Universal pressure sensor calibration tool

Abstract

The utility model discloses a universal pressure sensor calibration tool, which comprises a calibration table and a gas pipeline, and is characterized in that the gas pipeline is fixedly arranged on one side of the calibration table and extends into an inner cavity of the calibration table; one end of the gas pipeline extends out of one side of the calibration table and is fixedly provided with an exhaust valve; the calibration measurement assembly is arranged on one side of the top end of the calibration table. The pressure adjusting mechanism is arranged on the other side of the top end of the calibration table; the pressure display is fixedly arranged on the rear side of the top of the calibration table. According to the universal pressure sensor calibration tool, the connection sealing performance of the pressure sensor and the calibration table can be improved by arranging the calibration measurement assembly, the pipe cap can be replaced through the flange set and the switching valve, and the situation that the sealing effect is affected due to abrasion and aging of the pipe cap after long-time use is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure sensors, in particular to a universal pressure sensor calibration tool. Background Art

[0002] It is a very important step to calibrate the pressure sensor before leaving the factory. The calibration process is to ensure that the signal output by the sensor can accurately reflect the actual pressure value. This process usually includes the following aspects:

[0003] Accuracy calibration: Testing the sensor with a known standard pressure source to verify that its readings are accurate;

[0004] Linearity adjustment: ensure that the sensor has good linear response in the entire working range;

[0005] Zero and full-scale adjustment: ensure that the output of the sensor under no pressure or maximum design pressure is as expected;

[0006] Repeatability and stability test: Check the consistency of the sensor when measuring the same pressure over a long period of time and multiple times.

[0007] By following these steps, manufacturers can ensure that each sensor can provide reliable and accurate data, which is critical for many applications. For example, in industrial control, aerospace, medical equipment and other fields, accurate pressure measurement is extremely important for the normal operation and safety of the system.

[0008] The sealed connection between the calibration device and the pressure sensor is an important step in calibrating the pressure sensor. The existing sealing connection effect is poor, and the pressure sensor interface connection may wear or age during long-term use, which seriously affects the sealing effect and causes the pressure measurement calibration to be inaccurate. This is unacceptable for the calibration of high-precision pressure sensors. When performing secondary adjustments to a certain pressure source, it is also easy to cause the pressure source to be inaccurate, affecting multiple pressure value calibrations and making pressure regulation complicated. Utility Model Content

[0009] The purpose of the utility model is to provide a universal pressure sensor calibration tool to solve the problems in the prior art that the sealing connection effect is poor and the pressure sensor interface connection may wear or age during long-term use, thereby seriously affecting the sealing effect. When a certain pressure source is adjusted secondary, it is easy to cause the pressure source to be inaccurate.

[0010] To achieve the above objectives, the present invention provides the following technical solutions: a universal pressure sensor calibration tool, comprising:

[0011] Calibration platform;

[0012] A gas pipeline is fixedly arranged on one side of the calibration platform, and the gas pipeline extends into the inner cavity of the calibration platform;

[0013] An exhaust valve, one end of the gas pipeline extends out of one side of the calibration platform and is fixedly provided with an exhaust valve;

[0014] A calibration and measurement component is arranged on one side of the top of the calibration platform;

[0015] A pressure regulating mechanism is provided on the other side of the top of the calibration platform;

[0016] The pressure display is fixedly arranged on the rear side of the top end of the calibration platform.

[0017] Preferably, the calibration measurement assembly includes: a support tube, fixedly arranged at the top end of the outer wall of the gas pipeline, and the support tube is communicated with the inner cavity of the gas pipeline; a switching valve, the top end of the support tube extends out of the top end of the calibration platform and is fixedly provided with a switching valve; a flange group, the top end of the switching valve is fixedly provided with a flange group; a connecting tube, fixedly arranged at the top end of the flange group, and the connecting tube is communicated with the inner cavity of the switching valve; a pipe cap, which is sleeved with the top end of the outer wall of the connecting tube; a pressure sensor, the bottom end of the pressure sensor is screwed to the pipe cap; and a first combination gasket, which is arranged between the connecting tube and the pressure sensor.

[0018] Preferably, the top end of the connecting pipe is in a T-shape, and a second combined gasket is provided between the bottom end of the connecting pipe and the pipe cap.

[0019] Preferably, annular friction stripes are provided on the top end of the connecting pipe and on the upper and lower sides of the first combined pad.

[0020] Preferably, the pressure regulating mechanism includes: a gas cylinder, which is fixedly arranged at the top end of the outer wall of the gas pipeline, and the gas cylinder extends out of the upper surface of the calibration platform; a piston, which is adapted to be plugged into the inner cavity of the gas cylinder; a screw, which is rotatably arranged at the top end of the piston through a bearing, and the screw is threadedly connected to the top end of the gas cylinder; a rotating handle, which extends out of the upper surface of the gas cylinder and is fixedly provided with a rotating handle; a rotating column, which is rotatably arranged at the top end of the outer wall of the screw through a bearing; a measuring rod, which is fixedly arranged on one side of the bottom end of the rotating column, and the bottom end of the measuring rod is adapted to be plugged into the top end of the gas cylinder.

[0021] Preferably, a pressure detection value is provided on one side of the measuring rod.

[0022] Compared with the prior art, the beneficial effects of the present invention are: the universal pressure sensor calibration tooling can improve the connection sealing between the pressure sensor and the calibration platform by providing a calibration measurement component, and can replace the pipe cap through the flange group and the switching valve to avoid the pipe cap from being worn and aged for a long time and affecting the sealing effect; by providing a pressure regulating mechanism, the pressure value in the gas pipeline can be manually fine-tuned to facilitate measurement and calibration of the pressure sensor, and the adjustment is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This is a front cross-sectional view of the pipe cap of the utility model;

[0025] Figure 3 This is a schematic diagram of the assembly structure of the connecting pipe of the utility model;

[0026] Figure 4 It is a front cross-sectional view of the gas cylinder of the present utility model.

[0027] In the figure: 1. Calibration table, 2. Gas pipeline, 3. Exhaust valve, 4. Calibration measurement assembly, 41. Support tube, 42. Switching valve, 43. Flange group, 44. Connecting pipe, 45. Pipe cap, 46. Pressure sensor, 47. First combination pad, 48. Second combination pad, 49. Friction stripes, 5. Pressure regulating mechanism, 51. Gas cylinder, 52. Piston, 53. Screw, 54. Turning handle, 55. Turning column, 56. Measuring rod, 6. Pressure display. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figure 1-4 The utility model provides a technical solution: a universal pressure sensor calibration tool, comprising: a calibration platform 1, a gas pipeline 2, an exhaust valve 3, a calibration measurement component 4, a pressure regulating mechanism 5 and a pressure display 6;

[0030] The gas pipeline 2 is fixedly arranged on one side of the calibration platform 1, and the gas pipeline 2 extends into the inner cavity of the calibration platform 1. One end of the gas pipeline 2 extends out of one side of the calibration platform 1 and is fixedly provided with an exhaust valve 3. The calibration measurement component 4 is arranged on one side of the top of the calibration platform 1, and the pressure regulating mechanism 5 is arranged on the other side of the top of the calibration platform 1. The pressure display 6 is fixedly arranged on the rear side of the top of the calibration platform 1 and can display the pressure.

[0031] As a preferred solution, further, the calibration measurement assembly 4 includes: a support tube 41, a switching valve 42, a flange assembly 43, a connecting tube 44, a pipe cap 45, a pressure sensor 46, a first combination pad 47, a second combination pad 48 and friction stripes 49;

[0032] In order to be able to connect the pressure sensor 46, the support tube 41 is fixedly set at the top of the outer wall of the gas pipeline 2, and the support tube 41 is communicated with the inner cavity of the gas pipeline 2. The top of the support tube 41 extends out of the top of the calibration platform 1 and is fixedly provided with a switching valve 42. The top of the switching valve 42 is fixedly provided with a flange group 43. By providing the switching valve 42, the gas in the gas pipeline 2 can be sealed. The connecting tube 44 is fixedly set at the top of the flange group 43, and the connecting tube 44 is communicated with the inner cavity of the switching valve 42. The pipe cap 45 is socketed with the top of the outer wall of the connecting tube 44. The bottom end of the pressure sensor 46 is screwed to the pipe cap 45. The first combination pad 47 is arranged between the connecting tube 44 and the pressure sensor 46. Rotating the pipe cap 45 can avoid directly rotating the pressure sensor 46 to avoid the rotation direction of the pressure sensor 46 from being offset.

[0033] In order to further improve the sealing effect between the tube cap 45 and the pressure sensor 46 , the top end of the connecting tube 44 is T-shaped, and a second combination gasket 48 is provided between the bottom end of the connecting tube 44 and the tube cap 45 .

[0034] As a preferred solution, further, annular friction stripes 49 are provided on the top of the connecting tube 44 and the upper and lower sides of the first combined pad 47 to improve the sealing effect between the connecting tube 44 and the first combined pad 47.

[0035] As a preferred solution, further, the pressure regulating mechanism 5 includes: a gas cylinder 51, a piston 52, a screw 53, a rotating handle 54, a rotating column 55 and a measuring rod 56;

[0036] In order to be able to regulate the gas in the gas cylinder 51, the gas cylinder 51 is fixedly installed at the top of the outer wall of the gas pipeline 2, and the gas cylinder 51 extends out of the upper surface of the calibration platform 1. The piston 52 is adapted to be plugged into the inner cavity of the gas cylinder 51. The screw 53 is rotatably arranged on the top of the piston 52 through a bearing, and the screw 53 is screwed to the top of the gas cylinder 51. The screw 53 extends out of the upper surface of the gas cylinder 51 and is fixed with a handle 54.

[0037] In order to measure the movement of the screw 53, the rotating column 55 is rotatably set at the top of the outer wall of the screw 53 through the bearing, and the measuring rod 56 is fixedly set on one side of the bottom end of the rotating column 55, and the bottom end of the measuring rod 56 is adapted to be plugged into the top end of the gas cylinder 51.

[0038] As a preferred solution, further, a pressure detection value is set on one side of the measuring rod 56, and the pressure value applied to the gas pipeline 2 by the gas cylinder 51 can be measured based on the pressure detection value on the measuring rod 56.

[0039] The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process. The specific operations are as follows.

[0040] Step 1: When calibrating the pressure sensor 46, rotate the pipe cap 45 to screw the bottom end of the pressure sensor 46 to the pipe cap 45, so that the first combination gasket 47 and the second combination gasket 48 are clamped on the upper and lower sides of one end of the connecting pipe 44. The friction stripes 49 improve the sealing effect between the connecting pipe 44 and the pressure sensor 46, and the pressure sensor 46 is electrically connected to the pressure display 6.

[0041] Step 2: By injecting standard pressure into the gas pipeline 2 to measure and calibrate the pressure sensor 46, and displaying the pressure on the pressure display 6, the handle 54 is rotated to drive the screw 53 to rotate, so that the screw 53 is screwed into the gas cylinder 51 to drive the piston 52 to move downward. Driven by the screw 53, the column 55 can drive the measuring rod 56 to move downward. Based on the pressure detection value on the measuring rod 56, the pressure value applied to the gas pipeline 2 by the gas cylinder 51 can be measured, so that the pressure value in the gas pipeline 2 can be manually fine-tuned to facilitate measurement and calibration of the pressure sensor 46;

[0042] Step 3: After the pipe cap 45 has been used for a period of time, the flange group 43 is loosened to separate the pipe cap 45 from the calibration platform 1, so that the flange connection part on the flange group 43 can be directly replaced, which makes it easier to replace the pipe cap 45 to avoid wear or aging during long-term use that affects the pressure measurement results, and the sealing is better to ensure the measurement calibration accuracy.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A universal pressure sensor calibration tool, characterized in that: include: Calibration platform (1); A gas pipeline (2) is fixedly arranged on one side of the calibration platform (1), and the gas pipeline (2) extends into the inner cavity of the calibration platform (1); An exhaust valve (3), one end of the gas pipeline (2) extends out of one side of the calibration platform (1) and is fixedly provided with an exhaust valve (3); A calibration measurement component (4) is arranged on one side of the top end of the calibration platform (1); A pressure regulating mechanism (5) is arranged on the other side of the top of the calibration platform (1); A pressure display (6) is fixedly arranged on the rear side of the top end of the calibration platform (1).

2. The universal pressure sensor calibration tool according to claim 1, characterized in that: The calibration measurement component (4) comprises: A support tube (41) is fixedly arranged on the top end of the outer wall of the gas pipeline (2), and the support tube (41) is in communication with the inner cavity of the gas pipeline (2); A switching valve (42), wherein the top end of the support tube (41) extends out of the top end of the calibration platform (1) and is fixedly provided with the switching valve (42); A flange assembly (43), wherein the top end of the switching valve (42) is fixedly provided with a flange assembly (43); A connecting pipe (44) is fixedly arranged at the top end of the flange assembly (43), and the connecting pipe (44) is in communication with the inner cavity of the switching valve (42); A pipe cap (45) is sleeved on the top end of the outer wall of the connecting pipe (44); a pressure sensor (46), wherein the bottom end of the pressure sensor (46) is screwed to the pipe cap (45); A first combined gasket (47) is provided between the connecting pipe (44) and the pressure sensor (46).

3. The universal pressure sensor calibration tool according to claim 2, characterized in that: The top end of the connecting tube (44) is in a T-shape, and a second combination gasket (48) is provided between the bottom end of the connecting tube (44) and the tube cap (45).

4. The universal pressure sensor calibration tool according to claim 3, characterized in that: Annular friction stripes (49) are provided on the top end of the connecting pipe (44) and on the upper and lower sides of the first combined pad (47).

5. The universal pressure sensor calibration tool according to claim 1, characterized in that: The pressure regulating mechanism (5) comprises: A gas cylinder (51) is fixedly arranged on the top end of the outer wall of the gas pipeline (2), and the gas cylinder (51) extends out of the upper surface of the calibration platform (1); A piston (52) adapted to be plugged into the inner cavity of the gas cylinder (51); A screw rod (53) is rotatably arranged on the top end of the piston (52) via a bearing, and the screw rod (53) is threadedly connected to the top end of the gas cylinder (51); A rotating handle (54), the screw (53) extending out of the upper surface of the gas cylinder (51) and fixedly provided with the rotating handle (54); A rotating column (55) is rotatably arranged on the top end of the outer wall of the screw (53) via a bearing; The measuring rod (56) is fixedly arranged on one side of the bottom end of the rotating column (55), and the bottom end of the measuring rod (56) is adapted to be plugged into the top end of the gas cylinder (51).

6. The universal pressure sensor calibration tool according to claim 5, characterized in that: A pressure detection value is provided on one side of the measuring rod (56).

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