Abstract: Provided is an electric valve, including a valve seat and a valve needle, and the valve needle is mounted in the valve seat; a valve core, which is mounted at an end of the valve seat, and the valve core forms a valve opening; a driving assembly, which drives the valve needle to axially move so as to open and close the valve opening; the valve core is made of a non-metal material, an inner wall or an end face of the valve core forms a sealing face, and the sealing face and an outer wall face of the valve needle form a soft sealing structure. Through the soft sealing structure composed of the valve core and the valve needle, the technical problem of poor sealing performance of the electric valve can be solved.

Abstract: An active control method and device for large deformation of a deep thin-bedded surrounding rock, the active control method includes: drill holes in the surrounding rock of a tunnel against a tunnel face, add the active control device containing a sleeve, a high-strength prestressed anchor bolt, a resin anchoring agent and a grouting device into drill holes, apply a preload to the anchor bolt when the resin anchoring agent has a certain strength, and carry out lag grouting in the surrounding rock through the grouting device after stress adjustment, and the high-strength prestressed anchor bolt and the grouting device are inserted in the sleeve with holes on the side. The active control device or method of the invention can effectively reduce the fracture depth and degree of a thin-bedded soft rock in deep engineering, and effectively inhibit the occurrence of large deformation disasters.

Abstract: A driver and a control valve are provided. The control valve includes a valve body, a first valve core and a second valve core. The valve body provided with a valve cavity. A side wall of the valve body is provided with a plurality of communicating holes, and the communicating hole penetrates through the side wall of the valve body and is in communicate with the valve cavity. The first valve core is rotatably disposed at one end of the valve cavity, the first valve core is provided with a plurality of first passages and a plurality of second passages on a circumferential side of the first valve core. The second valve core is rotatably disposed at the other end of the valve cavity, and the second valve core is coaxially disposed with the first valve core, and the second valve core is coaxially disposed with the first valve core.

Abstract: Disclosed are a thermoforming device and method for a flexible printed circuit board. The thermoforming device may include: a first forming mechanism provided with a first forming portion, the first forming portion being configured to carry the flexible printed circuit board to be processed; a second forming mechanism provided with a second forming portion which matches with the first forming portion, at least one of the first forming portion or the second forming portion is provided with a corresponding heating module configured for heat treatment of the flexible printed circuit board; a first driving mechanism configured to drive the first forming mechanism and the second forming mechanism to be displaced relative to each other in a first direction; a second driving mechanism configured to drive the second forming mechanism and the first forming mechanism to be displaced relative to each other in a second direction perpendicular to the first direction; and a controller.

Abstract: A check valve is provided. The check valve includes a valve body and a piston unit. The valve body includes a valve cavity and a valve port. The valve body is provided with an inlet and an outlet. The valve port is located between the inlet and the valve cavity. The outlet is in communication with the valve cavity. The piston unit is capable of moving in the valve cavity along an axis of the valve body to open/close the valve port. The valve cavity includes a flaring portion. Along the axis of the valve body, a flow area of a cross section of the flaring portion is greater than a flow area of a cross section of the valve port.

Abstract: A valve device is provided, including a valve body unit and a valve seat. The valve seat is provided with a mounting cavity, and an end of the valve body unit is mounted in the mounting cavity. The valve device further includes a limiting unit, an outer side wall of the valve seat is provided with a mounting hole in communication with the mounting cavity along a radial direction of the mounting cavity, a side wall of the mounting cavity is recessed to form a mounting groove corresponding to the mounting hole, an end of the limiting unit extends into the mounting cavity from the mounting hole and is inserted into the mounting groove, and the limiting unit that extends into the mounting cavity abuts against the valve body unit to perform limiting along an axial direction and a circumferential direction between the valve body unit and the valve seat.

Abstract: The present disclosure relates to the technical field of automobiles, and discloses a control method, a control apparatus, and an electronic expansion valve. The control method includes: collecting first jumping signals in real time and recording a first time of collecting each first jumping signal; collecting second jumping signals in real time and recording a second time of collecting each second jumping signal; calculating a difference value between the second time and a corresponding first time; if the difference value is a positive value, increasing or decreasing a counted number by a set value, and accordingly, if the difference value is a negative value, decreasing or increasing the counted number by the set value; and within a set period of time, when the counted number is not increased or decreased, determining that a stepper motor is blocked.

Abstract: The present disclosure provides an electric valve, including: a valve seat, the valve seat having an end surface and a slot; a valve body, a portion of the valve body penetrating in the valve seat, and another portion of the valve body protruding from the end surface; a coil portion sleeved over the valve body, the coil portion and the slot being respectively located on two sides of the end surface; and a connection portion, the connection portion including a connection member and a support member and a clamping member arranged on the connection member. The connection member is fixedly connected to the coil portion, the support member abuts against the end surface, and the clamping member is clamped with the slot.

Abstract: A valve device is provided. The valve device includes a valve body unit, a mounting seat and a valve seat. The valve device further includes a fastening member. The mounting seat is provided with a limiting step, and a side surface of the valve seat is provided with a connecting hole in communication with the mounting hole along a direction perpendicular to an axis of the mounting hole. And an end of the fastening member extends into the mounting hole from the connecting hole and abuts against the limiting step.

Abstract: An electromagnetic valve and an electromagnetic valve assembly are provided. The electromagnetic valve includes: a valve body, which at least includes a valve seat, the valve seat being mounted on a mounting base; a magnetic conductive frame, which is fixed to the valve seat; and an electromagnetic driving assembly, which is mounted in the magnetic conductive frame. The magnetic conductive frame is provided with a positioning member, and the positioning member cooperates with the mounting base so as to restrict the electromagnetic driving assembly from rotating relative to the mounting base.

Abstract: An electromagnetic valve and an electromagnetic valve assembly are provided. The electromagnetic valve includes a first elastic member. An end of the first mounting cavity proximal to the valve port is provided with a limiting portion integrated with the valve body, the first elastic member is sleeved on the plugging assembly. One end of the first elastic member abuts against the plugging assembly, the other end of the first elastic member abuts against the valve body, and an outer surface of the other end of the first elastic member abuts against the limiting portion.

Abstract: A rotor assembly and an electronic water pump are provided, and the rotor assembly includes an impeller cover, an impeller base and a rotor. One end of the impeller base is connected to the impeller cover, an outer wall of the other end of the impeller base is provided with a ring-shaped mounting recess, and the rotor is mounted in the mounting recess. The rotor comprises a rotor iron core, a sleeve and at least two end plates, the rotor iron core is sleeved on an outside of the impeller base and located in the mounting recess, the sleeve is sleeved on an outside of the rotor iron core to seal the rotor iron core in the mounting recess, the at least two end plates are located on both ends of the rotor iron core, respectively. And the at least two end plates are connected to the sleeve.

Abstract: A ventilation door device for a refrigerator comprises: a frame, having an end plate provided with an opening portion, and having a blocking plate assembly rotatably mounted on the end plate, wherein the blocking plate assembly can rotate between a closed position in which the opening portion is completely closed and an open position in which the opening portion is completely open; a housing, engaging with the frame, wherein a driving chamber is formed between the housing and the frame; and a driving module, wherein the driving module is at least partially held in the driving chamber, and drives the blocking plate assembly to rotate. The frame has a housing engagement portion located on a side edge of the end plate and extending substantially perpendicular to the end plate. The housing is connected to the housing engagement portion of the frame. The blocking plate assembly comprises a blocking plate mounted on the end plate and an elastic component provided on the blocking plate.

Abstract: The present disclosure provides a motor, a water divider, and a dishwasher with the water divider. The motor includes: a housing, accommodating a coil assembly; a lead portion, electrically connected to the coil assembly and configured to be electrically connected to an external connector; a terminal connecting device, connected to the housing and configured to receive the lead portion and the external connector and electrically connect the lead portion to the external connector; and an isolation component, fixed to the terminal connecting device and enclosing a live part of the lead portion together with the terminal connecting device, and the terminal connecting device and the isolation component are both made from a flame-retardant material.