Abstract: The present disclosure provides an arch bracket for a diaphragm pressure gauge, comprising a bottom, first windows, ribs, second windows and a top arranged in order, the first windows and the second windows being arranged alternately, taking one of the first windows as an example, two sides of the first window being respectively provided with a first fulcrum and a third fulcrum, and a middle of the first window being provided with a second fulcrum, the first fulcrum and the third fulcrum being used to connect the bottom and the ribs, and the second fulcrum being used to connecting the ribs and the top, and the second fulcrum being located on a vertical line between the first fulcrum and the third fulcrum. By setting the pre-punched notches on the pre-punched part, the first windows and the second windows on the formed part are formed by the pre-punched notches.

Abstract: The present disclosure provides a pressure measuring instrument which comprises a gauge body, a connecting component and a pushing component, the connecting component comprises a first connecting member and a positioning sleeve which are connected with each other to form a corotating relationship, and the first connecting member comprises a first external thread section and a second external thread section connected to each other, and the first external thread section is used for a pressure-measuring hole threaded with a pressure vessel, the second external thread section protrudes from the pressure-measuring hole, the positioning sleeve is rotatably screwed to the second external thread section, and the positioning sleeve is configured to provide a force to the pressure vessel, and the pushing component is configured to pass through the connecting component and be pushed by a fluid in the pressure-measuring hole to push against a pressurize unit of the gauge body.

Abstract: A diaphragm pressure gauge includes a base, an inner cover, a diaphragm, a movement assembly, a pointer assembly, a dial plate, and an outer cover. The movement assembly is disposed within the inner cover. The diaphragm is disposed at a bottom end of the inner cover. The pointer assembly is disposed above the inner cover and connected with the movement assembly. A pressing worm shaft connected to the movement assembly is disposed at a central portion of the diaphragm. The base includes a connecting portion defining therein a pressure chamber in which a piston is disposed. The base defines a piston hole for engaging with the piston. One end of the piston extends through the piston hole and presses against the pressing worm shaft. The diaphragm pressure gauge can effectively prevent corrosion and damage of components inside the pressure gauge and detect a pressure as high as 1000 kg/cm2.