Mechanical calibration table for pressure gauge

Abstract

The utility model discloses a mechanical calibration table for a pressure gauge, which relates to the technical field of pressure gauge calibration and comprises a bottom plate, a top plate, a scissor jack and a clamp. A top plate and a scissor jack are fixed to the bottom plate, the top plate is of an n-shaped structure, a U-shaped groove is formed in the upper surface of the top plate forwards, the scissor jack is located in the top plate, a clamp is detachably installed on the top of the scissor jack and located below the U-shaped groove, a circular groove is formed in the clamp, and a flow guide pipe is further arranged in the clamp. One end of the flow guide pipe is communicated with the center of the circular groove, and the other end of the flow guide pipe penetrates out of the clamp and is connected with the pressure output end of the manual hydraulic cylinder; the utility model has the advantages that the flange of the diaphragm pressure gauge is clamped between the clamp and the top plate through the scissor jack, and the isolation diaphragm of the diaphragm pressure gauge is pressurized by the manual hydraulic cylinder through the flow guide pipe to complete the verification process, and the whole process does not have a pressure relief process, so that the verification accuracy of the pressure gauge is realized, and the verification efficiency is improved. And the re-pressing verification is avoided.

Description

Technical Field: Figure 1 , ,

[0010]

[0001] The utility model relates to the technical field of pressure gauge calibration, and specifically relates to a mechanical calibration bench for pressure gauges. Background Art:

[0002] Before the existing pressure gauges are used, they must be calibrated. Taking diaphragm pressure gauges as an example, during calibration, the flange needs to be placed on the pressure gauge calibration bench for calibration. However, since there are many vulnerable parts such as air source connectors, oil circuit connectors, and ferrule sleeves on the pressure gauge calibration bench, problems such as oil leakage, air leakage, and pressure loss are likely to occur during use, resulting in poor sealing between the flange fixture and the calibration bench top seat, leading to a series of problems such as pressure source pressure loss, oil leakage, and inaccurate calibration. When these problems occur, it is necessary to recheck and tighten the fixture, troubleshoot the fixture power source failure, and also re-pressurize and calibrate. Content of the Utility Model:

[0003] The purpose of the utility model is to provide a mechanical calibration bench for pressure gauges to solve the problems raised in the above background art.

[0004] The utility model is implemented by the following technical solutions:

[0005] A mechanical calibration bench for pressure gauges includes a bottom plate, a top plate, a scissor jack, and a fixture; the top plate and the scissor jack are fixed on the bottom plate, the top plate is in a "冂" - shaped structure and has a U - shaped groove opened forward on its upper surface, the scissor jack is located inside the top plate, the top of the scissor jack is detachably installed with a fixture and is located below the U - shaped groove, a circular groove is opened in the fixture, and a diversion pipe is also provided in the fixture. One end of the diversion pipe is communicated with the center of the circular groove, and the other end of the diversion pipe penetrates out of the fixture and is connected with the pressure output end of a manual hydraulic cylinder.

[0006] Preferably, a rubber ring is fixed on the inner surface of the edge of the circular groove.

[0007] Preferably, the fixture is installed on the top of the scissor jack by threaded connection.

[0008] Preferably, the diameter of the circular groove is equal to the flange diameter of the diaphragm pressure gauge.

[0009] The advantages of the utility model: The flange of the diaphragm pressure gauge is clamped between the fixture and the top plate by the scissor jack, and then the manual hydraulic cylinder is used to pressurize the isolation diaphragm of the diaphragm pressure gauge through the diversion pipe to complete the calibration. There is no pressure relief process in the whole process, so as to achieve the calibration accuracy of the pressure gauge and avoid the process of re - pressurizing and calibrating. Description of the Drawings:

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 is Figure 1 the front view of

[0012] Figure 3 is Figure 2 the sectional view at position A in

[0013] In the figure: 1, bottom plate; 2, top plate; 2.1, U-shaped groove; 3, scissor jack; 4, fixture; 4.1, circular groove; 4.2, diversion pipe; 4.3, rubber ring; 5, diaphragm pressure gauge. Specific implementation manner:

[0014] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0015] Please refer to Figure 1-3 , the present invention provides a technical solution for a mechanical calibration bench for pressure gauges:

[0016] A mechanical calibration bench for pressure gauges includes a bottom plate 1, a top plate 2, a scissor jack 3 and a fixture 4; the bottom plate 1 is fixedly provided with the top plate 2 and the scissor jack 3. The top plate 2 has a "冂"-shaped structure and is provided with a U-shaped groove 2.1 on its front upper surface. The scissor jack 3 is located inside the top plate 2. The top of the scissor jack 3 is detachably installed with the fixture 4 and is located below the U-shaped groove 2.1. A circular groove 4.1 is provided inside the fixture 4. A diversion pipe 4.2 is also provided inside the fixture 4. One end of the diversion pipe 4.2 is communicated with the center of the circular groove 4.1, and the other end of the diversion pipe 4.2 penetrates out of the fixture 4 and is connected to the pressure output end of a manual hydraulic cylinder.

[0017] A rubber ring 4.3 is fixed on the inner surface of the edge of the circular groove 4.1 to increase the sealing performance and prevent pressure relief.

[0018] The fixture 4 is installed on the top of the scissor jack 3 by threaded connection. The diameter of the circular groove 4.1 is equal to the flange diameter of the diaphragm pressure gauge 5. Therefore, the fixture 4 can be replaced according to different models of the diaphragm pressure gauge 5.

[0019] The operating principle is as follows: the flange of the diaphragm pressure gauge 5 is placed in the circular groove 4.1 of the fixture 4, so that the isolation diaphragm at the bottom of the diaphragm pressure gauge 5 is located in the center of the circular groove 4.1. The flange of the diaphragm pressure gauge 5 is then clamped between the fixture 4 and the top plate 2 using the scissor jack 3. The isolation diaphragm of the diaphragm pressure gauge 5 is then pressurized through the guide tube 4.2 using a manual hydraulic cylinder, causing the pressure of the diaphragm pressure gauge 5 to change. When the reading on the diaphragm pressure gauge 5 matches the pressure gauge reading on the manual hydraulic cylinder, the calibration of the diaphragm pressure gauge 5 is complete. The entire process does not involve pressure relief, thereby ensuring the accuracy of the pressure gauge calibration and avoiding the need for re-pressurization and calibration.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pressure gauge mechanical calibration platform, characterized in that: It includes a bottom plate (1), a top plate (2), a scissor jack (3) and a clamp (4); the top plate (2) and the scissor jack (3) are fixed on the bottom plate (1), the top plate (2) has a "冂”-shaped structure and is provided with a U-shaped groove (2.1) on its front upper surface, the scissor jack (3) is located inside the top plate (2), the top of the scissor jack (3) is detachably installed with the clamp (4) and is located below the U-shaped groove (2.1), a circular groove (4.1) is provided inside the clamp (4), a diversion pipe (4.2) is further provided inside the clamp (4), one end of the diversion pipe (4.2) is communicated with the center of the circular groove (4.1), and the other end of the diversion pipe (4.2) penetrates out of the clamp (4) and is connected with the pressure output end of a manual hydraulic cylinder.

2. A pressure gauge mechanical calibration platform according to claim 1, characterized in that: A rubber ring (4.3) is fixed on the inner surface of the edge of the circular groove (4.1).

3. A pressure gauge mechanical calibration platform according to claim 1, characterized in that: The clamp (4) is installed at the top of the scissor jack (3) by threaded connection.

4. A pressure gauge mechanical calibration platform according to claim 1, characterized in that: The diameter of the circular groove (4.1) is equal to the flange diameter of the diaphragm pressure gauge (5).

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