QUICK CONNECTION CLAMPING HOOP
A quick connection clamping hoop, including an upper clamping hoop body and a lower clamping hoop body that are both in a semi-annular shape; where the upper clamping hoop body and the lower clamping hoop body each have one end as a plug connecting end and the other end as a connecting end; connecting ends of the upper clamping hoop body and the lower clamping hoop body each are provided with a lug, and the connecting ends of the two are connected together via a bolt passing through lugs; plug connecting ends of the two are connected together via a plug connecting mechanism disposed at the plug connecting ends of the two. A clamping hoop in this structure is assembled and connected to a pipe quickly, and is convenient for use, which can greatly improve production efficiency of the clamping hoop and efficiency of pipe connection.
This application is a continuation of International Application No. PCT/CN2019/124153, filed on Dec. 10, 2019, which claims priority to Chinese Patent Application No. 201811535029.4, filed on Dec. 14, 2018. The disclosures of the aforementioned applications are hereby incorporated by reference in their entireties.
TECHNICAL FIELDThe present application relates to a clamping hoop for pipe connection, and in particular, to a quick connection clamping hoop.
BACKGROUNDAt present, a quick connection clamping hoop is widely used for pipe connection due to its convenient use and fast connection speed. An existing quick connection clamping hoop includes an upper clamping hoop body and a lower clamping hoop body that are both in a semi-annular shape, two upper convex ribs are disposed on an inner annular face of the upper clamping hoop body at intervals, the two upper convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and an upper sealing ring groove located between the upper convex ribs is disposed on the inner annular face; two lower convex ribs are disposed on an inner annular face of the lower clamping hoop body at intervals, the two lower convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and a lower sealing ring groove located between the lower convex ribs is disposed on the inner annular face; two end parts of the upper clamping hoop body and the lower clamping hoop body each are provided with a lug, the upper clamping hoop body and the lower clamping hoop body are connected together via bolts passing through lugs after end-to-end connections, and a sealing ring installed in the upper and lower sealing ring grooves is disposed between the upper clamping hoop body and the lower clamping hoop body.
The quick connection clamping hoop in the foregoing structure mainly has the following defects: first, connections at two ends are performed with the bolts, and when the upper clamping hoop body and the lower clamping hoop body are assembled and when the clamping hoop is connected to a pipe, two bolts need to be rotated, thereby reducing assembly efficiency and efficiency of connection and fastening with the pipe. Second, a distance between a groove bottom of the upper sealing ring groove and an inner annular face of an upper convex rib is an upper groove depth, and the upper groove depth is the same from a middle part of the upper clamping hoop body to two end parts; and a distance between a groove bottom of the lower sealing ring groove and an inner annular face of a lower convex rib is a lower groove depth, and the lower groove depth is the same from a middle part of the lower clamping hoop body to two end parts. Since an outer circumference of the sealing ring of the quick connection clamping hoop is greater than a sum of lengths of the upper and lower sealing ring grooves, after the upper clamping hoop body and the lower clamping hoop body are assembled together, a gap occurs at an end part of the quick connection clamping hoop, and when the clamping hoop is sleeved on the pipe for fastening, the sealing ring is deformed under pressure to protrude from the gap, which easily causes poor contact between a segment corresponding to a protruding part of the sealing ring and the pipe, so as to result in sealing failure. Third, a body of the sealing ring is connected with a retaining ring, since the retaining ring is firmly connected to the body of the sealing ring integrally, the retaining ring hinders free contraction of the sealing ring when the clamping hoop is tightly locked, which causes the sealing ring and the retaining ring to form corrugated uneveness, and as aging of the sealing ring, the retaining ring drives the sealing ring to contract inward, so that the body of the sealing ring and a ring lip are bonded together, thereby losing a self-sealing function and causing sealing failure.
Technical ProblemOne of the technical problems to be solved by the present application is to provide a quick connection clamping hoop that is faster and convenient when the clamping hoop itself is assembled and connected to a pipe with respect to the first defect in the foregoing background.
Technical SolutionsTo solve the foregoing technical problem, the present application provides a quick connection clamping hoop in the following structure, including an upper clamping hoop body and a lower clamping hoop body that are both in a semi-annular shape, two upper convex ribs being disposed on an inner annular face of the upper clamping hoop body at intervals, the two upper convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and an upper sealing ring groove located between the upper convex ribs being disposed on the inner annular face; and two lower convex ribs being disposed on an inner annular face of the lower clamping hoop body at intervals, the two lower convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and a lower sealing ring groove located between the lower convex ribs being disposed on the inner annular face; where structural features of the quick connection clamping hoop lie in: the upper clamping hoop body and the lower clamping hoop body each have one end as a plug connecting end and the other end as a connecting end; connecting ends of the upper clamping hoop body and the lower clamping hoop body each are provided with a lug, and the connecting ends of the two are connected together via a bolt passing through lugs; plug connecting ends of the upper clamping hoop body and the lower clamping hoop body are connected together via a plug connecting mechanism disposed at the plug connecting ends of the two; and after end-to-end connections, the upper clamping hoop body and the lower clamping hoop body are capable of enclosing central space for receiving a pipe, and a sealing ring installed in the upper and lower sealing ring grooves is disposed in the central space.
The plug connecting mechanism includes two connecting blocks connected to the plug connecting end of the upper clamping hoop body, the connecting blocks are connected with a connecting post, and the connecting blocks, the connecting post and the upper clamping hoop body enclose an inserting hole; the plug connecting end of the lower clamping hoop body is connected with a connecting arm whose outer end is a hook; and the hook of the connecting arm is capable of being hooked on the connecting post after the connecting arm is inserted into the inserting hole, so as to achieve an inserting connection of the plug connecting ends of the upper clamping hoop body and the lower clamping hoop body.
A face of the hook in contact with the connecting post and a face of the connecting post in contact with the hook are both arc faces.
The plug connecting mechanism includes a connecting plate connected to the plug connecting end of the upper clamping hoop body, the connecting plate is connected with a plug connecting post, and an inserting gap is disposed between the plug connecting post and the upper clamping hoop body; the plug connecting end of the lower clamping hoop body is connected with a plug connecting arm whose outer end is a hook; and the hook of the plug connecting arm is capable of being hooked on the plug connecting post after the plug connecting arm is inserted into the inserting gap, so as to achieve an inserting connection of the plug connecting ends of the upper clamping hoop body and the lower clamping hoop body.
A face of the hook in contact with the plug connecting post and a face of the plug connecting post in contact with the hook are both arc faces.
According to the present application, to solve the second defect in the foregoing background, the following improvements are made on the basis of the foregoing technical solution.
A distance between a groove bottom of the upper sealing ring groove of the upper clamping hoop body and an inner annular face of an upper convex rib is an upper groove depth; the upper groove depth is the greatest at a middle part of the upper clamping hoop body and the smallest at an end part of the upper clamping hoop body; a distance between a groove bottom of the lower sealing ring groove of the lower clamping hoop body and an inner annular face of a lower convex rib is a lower groove depth; and the lower groove depth is the greatest at a middle part of the lower clamping hoop body and the smallest at an end part of the lower clamping hoop body.
The upper groove depth gradually decreases from the middle part of the upper clamping hoop body to two end parts; and the lower groove depth gradually decreases from the middle part of the lower clamping hoop body to two end parts.
A groove bottom face of the upper sealing ring groove is an arc face in an elliptical arc shape, and the inner annular face of the upper convex rib is an arc face in an elliptical arc shape; and a groove bottom face of the lower sealing ring groove is an arc face in an elliptical arc shape, and the inner annular face of the lower convex rib is an arc face in an elliptical arc shape.
According to the present application, to solve the third defect in the foregoing background, the following improvements are made on the basis of the foregoing technical solutions.
The sealing ring includes a rubber ring body, two ends of the rubber ring body each are provided with an end wall that is integrally connected with the rubber ring body and is provided with an axial through hole in a central part, an inner edge of the end wall is axially inward convex to form a ring lip, and the sealing ring further includes a retaining ring not directly integrally connected with the rubber ring body.
The number of retaining rings are two, and the retaining rings are respectively connected to two ring lips.
A plurality of bumps are annularly disposed on an inner wall face of the rubber ring body, sockets are disposed on the bumps, and the retaining ring is inserted in the sockets.
An inner annular face of the retaining ring is connected with a guiding sleeve.
An annular connecting body is inserted between the rubber ring body and the ring lip, the annular connecting body is configured to be hollow to form a ring cavity, an opening is disposed on an outer annular face of the annular connecting body in a circumferential direction of the annular connecting body, and the retaining ring is connected to an inner annular face of the annular connecting body.
A plurality of liquid passage holes are annularly disposed on an inner annular face of the retaining ring, and the liquid passage holes are in communication with the ring cavity.
Beneficial Effects
According to the present application, an upper clamping hoop body and a lower clamping hoop body each have two ends respectively configured as a plug connecting end and a connecting end. Plug connecting ends are connected via a plug connecting mechanism, not only can a connection of the plug connecting ends of the upper clamping hoop body and the lower clamping hoop body be achieved quickly via the plug connecting structure, but also disassembly of them is achieved quickly. Connecting ends are connected via a bolt passing through lugs and a nut screwed onto the bolt. That is, when the upper clamping hoop body and the lower clamping hoop body are assembled, only one bolt and a nut need to be rotated relative to each other, and thus assembly of a clamping hoop is quick and convenient, which could greatly improve assembly efficiency. Similarly, when the clamping hoop is connected to a pipe, only one bolt and a nut need to be rotated relative to each other to achieve a fastening connection between the clamping hoop and the pipe, and thus efficiency of pipe connection could also be greatly improved.
According to the present application, a lower groove depth is set to be the greatest at a middle part of the lower clamping hoop body and to be the smallest at an end part of the lower clamping hoop body, and a upper groove depth is set to be the greatest at a middle part of the upper clamping hoop body and to be the smallest at an end part of the upper clamping hoop body. When the clamping hoop is fastened in this way, residual deformation of a sealing ring may be converged from the end parts of the upper and lower clamping hoop bodies to the middle parts of the upper and lower clamping hoop bodies after the sealing ring is deformed under pressure, which is not prone to a phenomenon that the sealing ring protrudes from the end parts of the upper and lower clamping hoop bodies after being deformed under pressure, may effectively ensure full contact between the sealing ring and the pipe, and could ensure a sealing effect.
According to the present application, a retaining ring is not directly integrally connected with a rubber ring body. The retaining ring not only plays a limiting role, but also does not hinder free contraction of the sealing ring when the clamping hoop is tightly locked, which does not cause the sealing ring and the retaining ring to form corrugated uneveness, and as aging of the sealing ring, the retaining ring does not drive the sealing ring to contract inward, which avoids that a body of the sealing ring and a ring lip are bonded together to lost a self-sealing function and cause sealing failure.
Specific embodiments of the present application will be further described below in detail with reference to the accompanying drawings.
With reference to
With reference to
With reference to
A groove bottom face of the upper sealing ring groove 4 is preferably designed as an arc face in an elliptical arc shape, and the inner annular face of the upper convex rib 3 is preferably designed as an arc face in an elliptical arc shape; that is, in an orthographic projection view of the clamping hoop body after being cut along a center line of gyration perpendicular to the upper clamping hoop body, that is, in
With reference to
A structural form of the foregoing sealing ring 11 is shown in
A second structural form of the sealing ring 11 is shown in
A fourth structural form of the sealing ring 11 is shown in
According to the present application, an upper clamping hoop body and a lower clamping hoop body each have two ends respectively configured as a plug connecting end and a connecting end. Plug connecting ends are connected via a plug connecting mechanism, not only can a connection of the plug connecting ends of the upper clamping hoop body and the lower clamping hoop body be achieved quickly via the plug connecting structure, but also disassembly of them is achieved quickly. Connecting ends are connected via a bolt passing through lugs and a nut screwed onto the bolt. That is, when the upper clamping hoop body and the lower clamping hoop body are assembled, only one bolt and a nut need to be rotated relative to each other, and thus assembly of a clamping hoop is quick and convenient, which could greatly improve assembly efficiency. Similarly, when the clamping hoop is connected to a pipe, only one bolt and a nut need to be rotated relative to each other to achieve a fastening connection between the clamping hoop and the pipe, and thus efficiency of pipe connection could also be greatly improved. According to the present application, a lower groove depth is set to be the greatest at a middle part of the lower clamping hoop body and to be the smallest at an end part of the lower clamping hoop body, and a upper groove depth is set to be the greatest at a middle part of the upper clamping hoop body and to be the smallest at an end part of the upper clamping hoop body. When the clamping hoop is fastened in this way, residual deformation of a sealing ring may be converged from the end parts of the upper and lower clamping hoop bodies to the middle parts of the upper and lower clamping hoop bodies after the sealing ring is deformed under pressure, which is not prone to a phenomenon that the sealing ring protrudes from the end parts of the upper and lower clamping hoop bodies after being deformed under pressure, may effectively ensure full contact between the sealing ring and the pipe, and could ensure a sealing effect. According to the present application, a retaining ring is not directly integrally connected with a rubber ring body. The retaining ring not only plays a limiting role, but also does not hinder free contraction of the sealing ring when the clamping hoop is tightly locked, which does not cause the sealing ring and the retaining ring to form corrugated uneveness, and as aging of the sealing ring, the retaining ring does not drive the sealing ring to contract inward, which avoids that a body of the sealing ring and a ring lip are bonded together to lost a self-sealing function and cause sealing failure.
Claims
1. A quick connection clamping hoop, comprising an upper clamping hoop body and a lower clamping hoop body that are both in a semi-annular shape, two upper convex ribs being disposed on an inner annular face of the upper clamping hoop body at intervals, the two upper convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and an upper sealing ring groove located between the upper convex ribs being disposed on the inner annular face; and two lower convex ribs being disposed on an inner annular face of the lower clamping hoop body at intervals, the two lower convex ribs being radially inward convex and extending in a circumferential direction of the inner annular face, and a lower sealing ring groove located between the lower convex ribs being disposed on the inner annular face; wherein the upper clamping hoop body and the lower clamping hoop body each have one end as a plug connecting end and the other end as a connecting end; connecting ends of the upper clamping hoop body and the lower clamping hoop body each are provided with a lug, and the connecting ends of the two are connected together via a bolt passing through lugs; plug connecting ends of the upper clamping hoop body and the lower clamping hoop body are connected together via a plug connecting mechanism disposed at the plug connecting ends of the two; and after end-to-end connections, the upper clamping hoop body and the lower clamping hoop body are capable of enclosing central space for receiving a pipe, and a sealing ring installed in the upper and lower sealing ring grooves is disposed in the central space.
2. The quick connection clamping hoop according to claim 1, wherein the plug connecting mechanism comprises two connecting blocks connected to the plug connecting end of the upper clamping hoop body, the connecting blocks are connected with a connecting post, and the connecting blocks, the connecting post and the upper clamping hoop body enclose an inserting hole; the plug connecting end of the lower clamping hoop body is connected with a connecting arm whose outer end is a hook; and the hook of the connecting arm is capable of being hooked on the connecting post after the connecting arm is inserted into the inserting hole, so as to achieve an inserting connection of the plug connecting ends of the upper clamping hoop body and the lower clamping hoop body.
3. The quick connection clamping hoop according to claim 2, wherein a face of the hook in contact with the connecting post and a face of the connecting post in contact with the hook are both arc faces.
4. The quick connection clamping hoop according to claim 1, wherein the plug connecting mechanism comprises a connecting plate connected to the plug connecting end of the upper clamping hoop body, the connecting plate is connected with a plug connecting post, and an inserting gap is disposed between the plug connecting post and the upper clamping hoop body; the plug connecting end of the lower clamping hoop body is connected with a plug connecting arm whose outer end is a hook; and the hook of the plug connecting arm is capable of being hooked on the plug connecting post after the plug connecting arm is inserted into the inserting gap, so as to achieve an inserting connection of the plug connecting ends of the upper clamping hoop body and the lower clamping hoop body.
5. The quick connection clamping hoop according to claim 4, wherein a face of the hook in contact with the plug connecting post and a face of the plug connecting post in contact with the hook are both arc faces.
6. The quick connection clamping hoop according to claim 1, wherein a distance between a groove bottom of the upper sealing ring groove of the upper clamping hoop body and an inner annular face of an upper convex rib is an upper groove depth; the upper groove depth is the greatest at a middle part of the upper clamping hoop body and the smallest at an end part of the upper clamping hoop body; a distance between a groove bottom of the lower sealing ring groove of the lower clamping hoop body and an inner annular face of a lower convex rib is a lower groove depth; and the lower groove depth is the greatest at a middle part of the lower clamping hoop body and the smallest at an end part of the lower clamping hoop body.
7. The quick connection clamping hoop according to claim 6, wherein the upper groove depth gradually decreases from the middle part of the upper clamping hoop body to two end parts; and the lower groove depth gradually decreases from the middle part of the lower clamping hoop body to two end parts.
8. The quick connection clamping hoop according to claim 6, wherein a groove bottom face of the upper sealing ring groove is an arc face in an elliptical arc shape, and the inner annular face of the upper convex rib is an arc face in an elliptical arc shape; and a groove bottom face of the lower sealing ring groove is an arc face in an elliptical arc shape, and the inner annular face of the lower convex rib is an arc face in an elliptical arc shape.
9. The quick connection clamping hoop according to claim 1, wherein the sealing ring comprises a rubber ring body, two ends of the rubber ring body each are provided with an end wall that is integrally connected with the rubber ring body and is provided with an axial through hole in a central part, an inner edge of the end wall is axially inward convex to form a ring lip, and the sealing ring further comprises a retaining ring not directly integrally connected with the rubber ring body.
10. The quick connection clamping hoop according to claim 9, wherein the number of retaining rings are two, and the retaining rings are respectively connected to two ring lips.
11. The quick connection clamping hoop according to claim 9, wherein a plurality of bumps are annularly disposed on an inner wall face of the rubber ring body, sockets are disposed on the bumps, and the retaining ring is inserted in the sockets.
12. The quick connection clamping hoop according to claim 11, wherein an inner annular face of the retaining ring is connected with a guiding sleeve.
13. The quick connection clamping hoop according to claim 9, wherein an annular connecting body is inserted between the rubber ring body and the ring lip, the annular connecting body is configured to be hollow to form a ring cavity, an opening is disposed on an outer annular face of the annular connecting body in a circumferential direction of the annular connecting body, and the retaining ring is connected to an inner annular face of the annular connecting body.
14. The quick connection clamping hoop according to claim 13, wherein a plurality of liquid passage holes are annularly disposed on an inner annular face of the retaining ring, and the liquid passage holes are in communication with the ring cavity.
Type: Application
Filed: May 11, 2021
Publication Date: Aug 26, 2021
Inventors: Tonghu ZHANG (Weifang), Chengfei PAN (Weifang), Ming LI (Weifang)
Application Number: 17/317,492