Alternating pulsation testing device of pressure sensing device

Abstract

The utility model discloses an alternating pulsation testing device of a pressure sensing device. The alternating pulsation testing device comprises an air storage tank, the gas storage tank is connected with a test gas pipe; the tail end of the test air pipe is provided with a test interface; a pressure regulation and control valve, a pneumatic control valve and a detection pressure transmitter are sequentially arranged on the test gas pipe between the gas storage tank and the test interface; the pneumatic control valve is connected with a low-pressure gas circuit, and an electric control valve is arranged on the low-pressure gas circuit; and the electric control valve is electrically connected with the control part. According to the utility model, through a simulation mode, an actual working environment when dynamic pressure alternately changes is realized, and a pressure sensing device is inspected and examined; and the automation degree is high, human intervention is little, working efficiency is high, and operation is labor-saving and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure monitoring and control, and relates to an alternating pulsation testing device for a pressure sensor device. Background Art

[0002] Pressure measurement sensors such as pressure switches and pressure transmitters are important components for safety protection in industrial process control. When the equipment is running, the working pressure of the equipment's fuel, lubricating oil, cooling water, and intake gas is detected by pressure switches and pressure transmitters as the basis for judging the normal operation of the equipment. Only when the pressure value measured by the pressure sensor is within the specified range can the equipment's lubrication system be well lubricated, the cooling system effectively dissipates heat and cools, the fuel system is supplied normally, and the intake system is fully supplied. When these pressure switches and transmitters cause erroneous measurements due to failures, it is impossible to timely and accurately measure and obtain the pressure data of each system on the equipment site, and it is impossible to accurately understand the operating status of the equipment on site, resulting in the equipment operation monitoring device being unable to play an effective protection and control function, which is not conducive to the long-term stable operation of the equipment.

[0003] In actual equipment use, the adjustment of the working speed due to working conditions will cause the pressure fluctuation of the related system of the equipment. This is because the driving power of most pumps comes from the equipment itself, that is, the so-called machine-driven pump. When the speed of the equipment itself changes, it will cause the speed of the pump driven by it to change, resulting in changes in the pumping pressure. And because the working principle of most pressure pumps determines the characteristics of the pump output pressure pulsation. These factors cause the pressure of the actual equipment to be in a fluctuating state. Too high or too low pressure is abnormal for the equipment system. For example, too low lubricating oil pressure will cause excessive wear of the moving pair due to ineffective lubrication. Too low cooling water pressure will cause the mechanical structure to fail due to overheating due to untimely heat dissipation. Too high pressure will cause overpressure of the seal and damage the sealing structure. Too high crankcase pressure of a diesel engine may mean abnormal wear of the moving parts, etc. These require high reliability requirements for pressure sensor devices when pressure pulsation changes, and can be verified and tested by some means.

[0004] The inspection and calibration of conventional pressure sensor devices are generally carried out through static pressure testing. The performance of the sensor is tested by manually operating a pressure clamp or a hand pump to perform a pressure test. The pressure during the test is expressed as static pressure. Obviously, this test method cannot fully reflect or detect the working conditions of pressure fluctuations in actual applications of pressure sensor devices. This requires a device that can provide continuous alternating pressure changes to simulate the actual operating conditions of the equipment in order to fully verify the measurement performance and continuous working reliability of the pressure sensor device. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the existing defects and provide an alternating pulsation test device for a pressure sensor device. The purpose is not only to realize the detection and calibration of the pressure sensor device under conventional static pressure, but also to realize the inspection and assessment of the pressure sensor device under alternating dynamic pressure changes through simulation, and to test the reliability of the pressure sensor device under repeated alternating pulsating pressure.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an alternating pulsation test device for a pressure sensor device, comprising a gas storage tank for storing high-pressure gas; the gas storage tank is connected to a test gas pipe; a test interface for connecting the pressure sensor device is provided at the end of the test gas pipe; a pressure regulating valve, a pneumatic control valve, and a detection pressure transmitter are provided in sequence on the test gas pipe between the gas storage tank and the test interface; the detection pressure transmitter is electrically connected to a control component and is used to send pressure data of the pressure sensor device during testing to the control component; the pneumatic control valve is used to control the switch of the test gas pipe so that the pressure sensor device is subjected to pulsating pressure, and the pressure regulating valve is used to control the pressure in the test gas pipe; the pneumatic control valve is connected to a low-pressure gas circuit, and an electric control valve is provided on the low-pressure gas circuit, which is used to control the switch of the pneumatic control valve through the switch of the electric control valve; the electric control valve is electrically connected to the control component and is used to control the switch of the electric control valve through the control component.

[0007] As a further optimization, the gas storage tank is also connected to an air supply pipeline, the end of the air supply pipeline is connected to an air compressor, and a gas supply shut-off valve is provided on the gas supply pipeline between the air compressor and the gas storage tank; and a gas storage tank shut-off valve is provided on the test air pipe between the gas storage tank and the pressure regulating valve.

[0008] As a further optimization, the gas storage tank is connected to a gas storage pressure transmitter, and the gas storage pressure transmitter is electrically connected to the control component for monitoring the pressure in the gas storage tank.

[0009] As a further optimization, the air compressor is electrically connected to a frequency converter, and the frequency converter is electrically connected to the control component, so as to control the operation of the air compressor through the control component.

[0010] As a further optimization, a diaphragm pressure gauge is connected to the test air pipe between the test interface and the detection pressure transmitter; and a digital pressure gauge is provided on the circuit between the detection pressure transmitter and the control component.

[0011] As a further optimization, the low-pressure air circuit includes a first pipeline and a second pipeline respectively connected to the electric control valve; the ends of the first pipeline and the second pipeline are connected to the pneumatic control valve; the electric control valve is connected to a third pipeline for obtaining a pressure air source.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model realizes the actual working environment when the dynamic pressure changes alternately by means of simulation, inspects and examines the pressure sensor device, and tests the reliability of the pressure sensor device under the repeated alternating pulsating pressure; it can truly reflect the accuracy, reliability and long-term working ability of the sensor device signal detection, and then judge whether the pressure sensor device to be tested can work reliably and effectively; and it has a high degree of automation, less human intervention, high work efficiency, and labor-saving and convenient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model.

[0015] The correspondence between the technical features and the reference numerals in the figure is: frequency converter 1; air compressor 2; air supply stop valve 3; air storage tank 4; air storage pressure transmitter 5; air storage tank stop valve 6; pressure regulating valve 7; pneumatic control valve 8; detection pressure transmitter 9; test interface 10; diaphragm pressure gauge 11; digital pressure gauge 12; electric control valve 13; test air pipe 14; control component 15; low-pressure air circuit 20; first pipeline 21; second pipeline 22; third pipeline 23; air supply pipeline 30. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] See also Figure 1The utility model provides a technical solution: an alternating pulsation test device for a pressure sensor device, comprising a gas storage tank 4 for storing high-pressure gas; the gas storage tank 4 is connected to a test gas pipe 14; the end of the test gas pipe 14 is provided with a test interface 10 for connecting the pressure sensor device; the test gas pipe 14 between the gas storage tank 4 and the test interface 10 is provided with a pressure regulating valve 7, a pneumatic control valve 8, and a detection pressure transmitter 9 in sequence; the detection pressure transmitter 9 is electrically connected to a control component 15, and is used to transmit the pressure data of the pressure sensor device during the test. sent to the control component 15; the pneumatic control valve 8 is used to control the switch of the test air pipe 14 so that the pressure sensor device is subjected to pulsating pressure, and the pressure regulating valve 7 is used to control the pressure in the test air pipe 14; the pneumatic control valve 8 is connected to a low-pressure air circuit 20, and an electric control valve 13 is provided on the low-pressure air circuit 20, which is used to control the switch of the pneumatic control valve 8 by the switch of the electric control valve 13; the electric control valve 13 is electrically connected to the control component 15, and is used to control the switch of the electric control valve 13 by the control component 15.

[0018] The working principle includes that the high-pressure gas in the gas storage tank 4 is output through the pressure-limiting output of the pressure regulating valve 7, and the pressure sensor on the test interface 10 obtains a certain pressure, and the pneumatic control valve 8 is repeatedly opened and closed under the control of the electric control valve 13, so that the air pressure output by the test air pipe 14 is in a pulsating form, so that the working reliability of the pressure sensor under pulsating pressure can be tested. Among them, the pressure value obtained by the detection pressure transmitter 9 is the pressure obtained by the actual pressure sensor, and the pressure reference value preset by the pressure regulating valve 7 is compared and recorded by the control component 15. The low-pressure air circuit 20 is the working air circuit of the pneumatic control valve 8. The control component 15 sends an electrical signal instruction to control the switch of the electric control valve 13. When the electric control valve 13 is opened, the low-pressure air circuit 20 is connected, the pneumatic control valve 8 is opened, and the air pressure output by the test air pipe 14 is measured. When the control component 15 sends an electrical signal instruction to control the electric control valve 13 to be closed, the low-pressure air circuit 20 is closed, the pneumatic control valve 8 is closed, and the ventilation of the test air pipe 14 is interrupted, thereby obtaining pulsating air pressure. Among them, if Figure 1 As shown, there are four pipelines ABCD, A is the gas supply pipeline 30 of the gas storage tank, B is the test pipeline, i.e. the test gas pipe 14, C is the control gas pipeline, i.e. the low-pressure gas circuit 20, and D is the control circuit connecting line, i.e. the control circuit.

[0019] In order to ensure that the air tank 4 has sufficient air pressure for a long time, the air tank 4 is also connected to an air supply pipeline 30, and the end of the air supply pipeline 30 is connected to the air compressor 2; the air compressor 2 is opened when air replenishment is needed to replenish gas for the air tank 4 to increase the pressure; for the convenience of maintenance, a gas supply stop valve 3 is provided on the air supply pipeline 30 between the air compressor 2 and the air tank 4; when the gas supply stop valve 3 is closed, the air compressor 2 can be repaired. A gas tank 4 stop valve is provided on the test air pipe 14 between the gas tank 4 and the pressure regulating valve 7. When the device on the test pipeline needs to be repaired, the gas tank 4 stop valve is closed to improve the convenience of use.

[0020] In order to automatically select the gas replenishment timing of the gas storage tank 4, the gas storage tank 4 is connected to a gas storage pressure transmitter 5, which is electrically connected to the control component 15 and is used to monitor the pressure in the gas storage tank 4. When the pressure in the gas storage tank 4 is lower than a preset value, the gas storage pressure transmitter 5 sends a signal to the control component 15, and the control component 15 controls the air compressor 2 to start.

[0021] An exemplary control component 15 controls the air compressor 2 in a manner where the air compressor 2 is electrically connected to the frequency converter 1 , and the frequency converter 1 is electrically connected to the control component 15 , for controlling the operation of the air compressor 2 through the control component 15 .

[0022] In order to facilitate monitoring of the air pressure output by the test air pipe 14, a diaphragm pressure gauge 11 is connected to the test air pipe 14 between the test interface 10 and the detection pressure transmitter 9 to monitor the test gas pipeline pressure; a digital pressure gauge 12 is provided on the circuit between the detection pressure transmitter 9 and the control component 15 to intuitively display the test gas pipeline pressure and facilitate personnel monitoring.

[0023] In an exemplary embodiment of a low-pressure gas circuit, the low-pressure gas circuit 20 includes a first pipeline 21 and a second pipeline 22 respectively connected to the electric control valve 13; the ends of the first pipeline 21 and the second pipeline 22 are connected to the pneumatic control valve 8; the electric control valve 13 is connected to a third pipeline 23 for obtaining a pressure gas source.

[0024] When in use, the control component 15 outputs a signal to control the working state of the frequency converter 1, thereby controlling the air compressor 2 to inflate the gas tank 4. A pressure stop valve is installed at the outlet of the air compressor 2 so that the pressure in the gas tank 4 reaches the set value. The pressure in the gas tank 4 is detected by the gas pressure transmitter 5. When the detection value of the pressure transmitter reaches the preset value, the air compressor 2 is stopped by the frequency converter 1. The stop valve of the gas tank 4 is used to control the gas outlet in the gas tank, and the pressure regulating valve is used to adjust the test pressure at the outlet of the gas tank 4. Generally speaking, the pressure in the gas tank 4 is higher than the test pressure. The purpose of this is to leave sufficient pressure flow when performing frequent alternating pressure detection, and to ensure a stable supply of test pressure during frequent alternating pressure detection. The pressure gas in the gas tank 4 is adjusted by the pressure regulating valve to become the test gas and enter the test gas pipe 14. The electric control gas is a three-position five-way exhaust valve, and the pneumatic control valve 8 is a three-position five-way closed valve. The electric control gas valve receives the control signal output by the control component 15 to control the L and R electromagnetic coils of the electric control valve 13 respectively, and drives the valve core of the electric control valve 13 to move left and right. According to the left and right movement of the valve core, the electric control valve 13 is connected to the external constant pressure compressed air, and the external constant pressure compressed air is introduced into the pneumatic control valve 8 to drive its valve core to move left and right or discharge the external constant pressure compressed air, so as to form the control component 15 electrically controlling the electric control valve 13, the electric control valve 13 pneumatically controlling the pneumatic control valve 8, and the start control valve controls the test air pipe 14 to generate pulsating pressure. The test pressure outlet is used to connect the pressure sensor device to be tested to the outside. The external device to be tested is determined as needed, which can be a pressure switch, a pressure transmitter, etc. The detection pressure changer is used to monitor the test gas pressure, and its output detection signal is used for the reading of the digital pressure gauge 12. At the same time, it is also connected to the diaphragm pressure gauge 11 for mutual calibration of the test pressure.

[0025] The advantages of this embodiment are that this embodiment realizes the actual working environment when the dynamic pressure changes alternately by simulation, inspects and evaluates the pressure sensor device, and tests the reliability of the pressure sensor device under repeated alternating pulsating pressure; it can truly reflect the accuracy, reliability, and long-term working ability of the sensor device signal detection, and then determine whether the pressure sensor device to be tested can work reliably and effectively; and it has a high degree of automation, less human intervention, high work efficiency, and labor-saving and convenient operation.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An alternating pulsation test device for a pressure sensor device, comprising a gas storage tank (4) for storing high-pressure gas; the gas storage tank (4) is connected to a test gas pipe (14); characterized in that: The end of the test air pipe (14) is provided with a test interface (10) for connecting the pressure sensor device; the test air pipe (14) between the gas storage tank (4) and the test interface (10) is provided with a pressure regulating valve (7), a pneumatic control valve (8), and a detection pressure transmitter (9) in sequence; the detection pressure transmitter (9) is electrically connected to a control component (15); The pneumatic control valve (8) is used to control the switch of the test air pipe (14) so ​​that the pressure sensor device is subjected to pulsating pressure, and the pressure regulating valve (7) is used to control the pressure in the test air pipe (14); The pneumatic control valve (8) is connected to a low-pressure gas circuit (20), and an electric control valve (13) is provided on the low-pressure gas circuit (20) for controlling the switch of the pneumatic control valve (8) by switching the electric control valve (13); the electric control valve (13) is electrically connected to the control component (15) for controlling the switch of the electric control valve (13) by the control component (15).

2. The alternating pulsation test device for a pressure sensor device according to claim 1, characterized in that: The gas storage tank (4) is also connected to an air supply pipeline (30), the end of which is connected to an air compressor (2), and an air supply stop valve (3) is provided on the gas supply pipeline (30) between the air compressor (2) and the gas storage tank (4); and an air storage tank (4) stop valve is provided on the test air pipe (14) between the gas storage tank (4) and the pressure regulating valve (7).

3. The alternating pulsation test device for a pressure sensor device according to claim 1, characterized in that: The gas storage tank (4) is connected to a gas storage pressure transmitter (5), and the gas storage pressure transmitter (5) is electrically connected to the control component (15) and is used to monitor the pressure in the gas storage tank (4).

4. The alternating pulsation test device for a pressure sensor device according to claim 2, characterized in that: The air compressor (2) is electrically connected to the frequency converter (1), and the frequency converter (1) is electrically connected to the control component (15) for controlling the operation of the air compressor (2) through the control component (15).

5. The alternating pulsation test device for a pressure sensor device according to claim 1, characterized in that: A diaphragm pressure gauge (11) is connected to the test air pipe (14) between the test interface (10) and the test pressure transmitter (9); and a digital pressure gauge (12) is provided on the circuit between the test pressure transmitter (9) and the control component (15).

6. The alternating pulsation test device for a pressure sensor device according to claim 1, characterized in that: The low-pressure gas circuit (20) comprises a first pipeline (21) and a second pipeline (22) respectively connected to the electric control valve (13); the ends of the first pipeline (21) and the second pipeline (22) are connected to the pneumatic control valve (8); and the electric control valve (13) is connected to a third pipeline (23) for obtaining a pressure gas source.

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