High and low temperature valve detection mechanism

Abstract

The utility model discloses a high and low temperature valve detection mechanism, which belongs to the technical field of valve detection and comprises a gas source main gas circuit, a high temperature test gas circuit, a low temperature test gas circuit, a detection gas output pipeline and a heat dissipation device. The high-temperature testing gas circuit and the low-temperature testing gas circuit are connected in parallel, the temperature of gas in the high-temperature testing gas circuit is higher than that of gas in the low-temperature testing gas circuit, the two ends of the high-temperature testing gas circuit and the two ends of the low-temperature testing gas circuit are connected with the gas source main gas circuit and the to-be-tested valve respectively, and the end, away from the gas source main gas circuit, of the to-be-tested valve is connected with the detection gas output pipeline. And the heat dissipation device is arranged on the detection gas output pipeline. According to the high and low temperature valve detection mechanism disclosed by the utility model, through the high temperature test gas circuit and the low temperature test gas circuit which are arranged in parallel, high temperature detection or low temperature detection of the valve can be realized, different detection requirements are met, the application range is wide, and the flexibility is strong.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a high and low temperature valve testing mechanism. Background Technology

[0002] As a shut-off device, valves are subjected to repeated high-temperature shocks during use. Therefore, testing the lifespan of valves is an essential part of quality control.

[0003] Currently, the test benches for valve life testing have limited functionality, only capable of conducting life tests under normal temperature and static pressure conditions. They cannot perform life tests on valves that require operation in high temperature and high pressure environments, failing to meet the high temperature testing requirements of valves and exhibiting poor applicability. Utility Model Content

[0004] This invention provides a high and low temperature valve testing mechanism to overcome the above-mentioned problems.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A high and low temperature valve testing mechanism includes a main gas source circuit, a high temperature test gas circuit, a low temperature test gas circuit, a test gas output pipeline, and a heat dissipation device;

[0007] The high-temperature test gas path and the low-temperature test gas path are connected in parallel. The gas temperature in the high-temperature test gas path is higher than that in the low-temperature test gas path. The two ends of the high-temperature test gas path and the low-temperature test gas path are respectively connected to the main gas source path and the valve under test. The end of the valve under test that is away from the main gas source path is connected to the detection gas output pipeline. The heat dissipation device is provided on the detection gas output pipeline.

[0008] Furthermore, the high-temperature test gas path includes a first pneumatic diaphragm valve and a heater connected to the first pneumatic diaphragm valve. The end of the first pneumatic diaphragm valve away from the heater is connected to the main gas source path, and the end of the heater away from the first pneumatic diaphragm valve is connected to the valve under test through a high-temperature pipeline.

[0009] Furthermore, the low-temperature test gas path includes a low-temperature pipeline and a second pneumatic diaphragm valve disposed on the low-temperature pipeline. One end of the low-temperature pipeline is connected to the main gas source pipeline, and the other end of the low-temperature pipeline is connected to the high-temperature pipeline.

[0010] Furthermore, it also includes a first pressure sensor and a second pressure sensor located on both sides of the valve to be tested, with the first pressure sensor located on the high-temperature pipeline and the second pressure sensor located on the detection gas output pipeline.

[0011] Furthermore, a first temperature sensor is provided between the heater and the first pressure sensor, and a second temperature sensor is provided on the side of the second pressure sensor away from the valve to be tested.

[0012] Furthermore, the heat dissipation device includes a heat sink, a third temperature sensor, and a discharge valve arranged sequentially from the air inlet of the detection gas output pipeline to the air outlet of the detection gas output pipeline. The heat sink is located on the side of the second temperature sensor away from the second pressure sensor.

[0013] Furthermore, it also includes the instrument air circuit;

[0014] The instrument air circuit includes an instrument air inlet pipe and a first ball valve, a pressure regulating valve, and a three-way solenoid valve sequentially disposed on the instrument air inlet pipe. The three-way solenoid valve is connected to the first pneumatic diaphragm valve and the second pneumatic diaphragm valve, respectively.

[0015] Furthermore, it also includes an experimental frame, on which the main gas source path, the high-temperature test gas path, the low-temperature test gas path, the detection gas output pipeline, and the heat dissipation device are all mounted.

[0016] Furthermore, it also includes a controller for controlling the temperature of the heater and the switching status and switching time of the first pneumatic diaphragm valve, the second pneumatic diaphragm valve and the discharge valve, the controller being electrically connected to the heater, the first pneumatic diaphragm valve, the second pneumatic diaphragm valve, the discharge valve, the three-way solenoid valve, the first temperature sensor, the second temperature sensor, the third temperature sensor, the first pressure sensor and the second pressure sensor, respectively;

[0017] The controller is located on the experimental rack.

[0018] Furthermore, a second ball valve and a flow meter are provided on the main gas supply line.

[0019] The beneficial effects of this utility model are:

[0020] The high and low temperature valve testing mechanism disclosed in this utility model can achieve high temperature testing or low temperature testing of valves by means of a high temperature test gas path and a low temperature test gas path arranged in parallel, which can meet different testing needs, have a wide range of applications and strong flexibility. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a high and low temperature valve detection mechanism disclosed in an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Main gas supply line;

[0025] 2. High-temperature test gas circuit; 21. First pneumatic diaphragm valve; 22. Heater; 23. High-temperature pipeline;

[0026] 3. Low-temperature test gas circuit; 31. Low-temperature pipeline; 32. Second pneumatic diaphragm valve;

[0027] 4. Inspect the gas output pipeline;

[0028] 5. Heat dissipation device; 51. Heat sink; 52. Third temperature sensor; 53. Drain valve;

[0029] 6. The valve to be tested;

[0030] 7. First pressure sensor;

[0031] 8. Second pressure sensor;

[0032] 9. First temperature sensor;

[0033] 10. Second temperature sensor;

[0034] 11. Instrument air intake pipe;

[0035] 12. First ball valve;

[0036] 13. Pressure regulating valve;

[0037] 14. Three-way solenoid valve;

[0038] 15. Second ball valve;

[0039] 16. Flow meter. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] like Figure 1 The figure shown is a high and low temperature valve testing mechanism provided in this embodiment, including a main gas source line 1, a high temperature test gas line 2, a low temperature test gas line 3, a test gas output pipeline 4, and a heat dissipation device 5;

[0042] The high-temperature test gas path 2 and the low-temperature test gas path 3 are connected in parallel. The gas temperature in the high-temperature test gas path 2 is higher than the gas temperature in the low-temperature test gas path 3. The two ends of the high-temperature test gas path 2 and the low-temperature test gas path 3 are respectively connected to the main gas source path 1 and the valve under test 6. The end of the valve under test 6 away from the main gas source path 1 is connected to the detection gas output pipeline 4. The heat dissipation device 5 is provided on the detection gas output pipeline 4.

[0043] This utility model discloses a high and low temperature valve testing mechanism, which can realize high temperature testing or low temperature testing of valves by setting high temperature test gas path and low temperature test gas path in parallel, meeting different testing needs, with a wide range of applications and strong flexibility.

[0044] When using this testing mechanism for high-temperature testing, the controller adjusts the instrument air path to open the first pneumatic diaphragm valve and close the second pneumatic diaphragm valve. The test gas enters the valve under test 6 through the main air source path 1 and the high-temperature test air path 2, and high-temperature testing is performed at this time. When the controller adjusts the instrument air path to close the first pneumatic diaphragm valve and open the second pneumatic diaphragm valve, the test gas enters the valve under test 6 through the main air source path 1 and the low-temperature test air path 3, and low-temperature testing is performed at this time. This mechanism can detect different temperatures of valves with a single testing device, which is highly flexible and has a wider range of applications.

[0045] In a specific embodiment, the high-temperature test gas path 2 includes a first pneumatic diaphragm valve 21 and a heater 22 connected to the first pneumatic diaphragm valve 21. The end of the first pneumatic diaphragm valve 21 away from the heater 22 is connected to the main gas source path 1, and the end of the heater 22 away from the first pneumatic diaphragm valve 21 is connected to the valve under test 6 through a high-temperature pipeline 23. The heater 22 is used to heat the test gas so that the test gas reaches the required test temperature and then enters the valve under test, thereby performing high-temperature testing on the valve under test. The first pneumatic diaphragm valve 21 is used to control the opening or closing of the high-temperature test gas path. The first pneumatic diaphragm valve 21 cooperates with the second pneumatic diaphragm valve 32 to realize the switching between high-temperature and low-temperature testing.

[0046] In a specific embodiment, the low-temperature test gas path 3 includes a low-temperature pipeline 31 and a second pneumatic diaphragm valve 32 disposed on the low-temperature pipeline 31. One end of the low-temperature pipeline 31 is connected to the main gas source path 1, and the other end of the low-temperature pipeline 31 is connected to the high-temperature pipeline 23. The second pneumatic diaphragm valve 32 is used to control the opening or closing of the low-temperature pipeline 31, and cooperates with the first pneumatic diaphragm valve 21 to realize the switching between high-temperature and low-temperature testing. When the second pneumatic diaphragm valve 32 is opened, the detection gas enters from the main gas source path 1 and then enters the valve to be tested through the low-temperature pipeline 31, thereby realizing the low-temperature detection of it.

[0047] In a specific embodiment, a first pressure sensor 7 and a second pressure sensor 8 are also provided on both sides of the valve under test 6. The first pressure sensor 7 is provided on the high-temperature pipeline 23, and the second pressure sensor is provided on the detection gas output pipeline 4. The first pressure sensor 7 and the second pressure sensor 8 are used to monitor the pressure data on both sides of the valve under test in real time, and to detect the valve's sealing performance, pressure resistance and safety data.

[0048] In a specific embodiment, a first temperature sensor 9 is provided between the heater 22 and the first pressure sensor 7, and a second temperature sensor 10 is provided on the side of the second pressure sensor 8 away from the valve 6 under test. The first temperature sensor 9 is used to monitor the temperature of the gas under test after being heated by the heater in real time, so as to ensure that the temperature of the gas entering the valve under test meets the detection requirements. The second temperature sensor 10 is used to monitor the gas temperature at the output end of the valve 6 under test in real time and evaluate the impact of temperature on valve performance (sealing performance and structural safety).

[0049] In a specific embodiment, the heat dissipation device 5 includes a heat sink 51, a third temperature sensor 52, and an exhaust valve 53 arranged sequentially from the air inlet of the detection gas output pipeline 4 to the air outlet of the detection gas output pipeline 4. The heat sink 51 is located on the side of the second temperature sensor 10 away from the second pressure sensor 8. The air outlet of the detection gas output pipeline 4 is connected to the atmosphere. The exhaust valve 53 is a needle valve used to regulate the emission / non-emission state of the gas. The heat sink 51 is used to cool the detection gas after use. The third temperature sensor 52 is used to monitor the temperature of the detection gas after being cooled by the heat sink 51, and to provide real-time feedback on the working effect of the cooling device to ensure that the gas temperature drops to a safe threshold, ensuring compliance with the temperature limits of emission standards, and avoiding environmental safety hazards (such as the risk of burns) caused by high-temperature emissions.

[0050] In a specific embodiment, it also includes an instrument air circuit;

[0051] The instrument air circuit includes an instrument air inlet pipe 11 and a first ball valve 12, a pressure regulating valve 13, and a three-way solenoid valve 14 sequentially disposed on the instrument air inlet pipe 11. The three-way solenoid valve 14 is connected to the first pneumatic diaphragm valve 21 and the second pneumatic diaphragm valve 32, respectively. The instrument air inlet pipe 11 and the first ball valve 12, pressure regulating valve 13, and three-way solenoid valve 14 disposed thereon are used to regulate the opening or closing of the first pneumatic diaphragm valve 21 and the second pneumatic diaphragm valve 32, thereby controlling the opening or closing of the high-temperature test air circuit 2 and the low-temperature test air circuit 3, thus realizing flexible adjustment for high-temperature or low-temperature testing of the valve under test.

[0052] In a specific embodiment, the test rack is also included. The main gas supply line 1, the high-temperature test gas line 2, the low-temperature test gas line 3, the detection gas output line 4, and the heat dissipation device 5 are all mounted on the test rack. The test rack facilitates the overall movement of the testing mechanism and ensures the stability of the mechanism.

[0053] In a specific embodiment, it also includes a controller for controlling the temperature of the heater 22 and the switching status and switching time of the first pneumatic diaphragm valve 21, the second pneumatic diaphragm valve 32 and the discharge valve 53. The controller is electrically connected to the heater 22, the first pneumatic diaphragm valve 21, the second pneumatic diaphragm valve 32, the discharge valve 53, the three-way solenoid valve 14, the first temperature sensor 9, the second temperature sensor 10, the third temperature sensor 52, the first pressure sensor 7 and the second pressure sensor 8, respectively.

[0054] The controller is mounted on the experimental frame. The controller is a PLC. The PLC receives signals from various temperature and pressure sensors and controls the opening and closing of the first pneumatic diaphragm valve 21, the second pneumatic diaphragm valve 32, the discharge valve 53, and the three-way solenoid valve 14. It also adjusts the heating temperature of the heater 22 and the heat dissipation temperature of the heat sink 51. These processes are existing technologies, and their principles will not be elaborated here. The controller automates the opening and closing of valves and the temperature control of the heater and heat sink, improving the ease of use and control efficiency of this device.

[0055] In a specific embodiment, the main gas supply line 1 is equipped with a second ball valve 15 and a flow meter 16. The second ball valve 15 is used to control whether the detection gas is introduced into the detection mechanism, and the flow meter 16 is used to detect the gas flow rate into the detection mechanism to prevent the flow rate from being too low or too high, which would not meet the detection requirements and avoid the problem of reduced accuracy of the detection results.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high and low temperature valve testing mechanism, characterized in that, It includes a main gas supply line (1), a high-temperature test gas line (2), a low-temperature test gas line (3), a test gas output line (4), and a heat dissipation device (5); The high-temperature test gas path (2) and the low-temperature test gas path (3) are connected in parallel. The gas temperature in the high-temperature test gas path (2) is higher than the gas temperature in the low-temperature test gas path (3). The two ends of the high-temperature test gas path (2) and the low-temperature test gas path (3) are respectively connected to the main gas source path (1) and the valve to be tested (6). The end of the valve to be tested (6) away from the main gas source path (1) is connected to the detection gas output pipeline (4). The heat dissipation device (5) is installed on the detection gas output pipeline (4).

2. The high and low temperature valve testing mechanism according to claim 1, characterized in that, The high-temperature test gas path (2) includes a first pneumatic diaphragm valve (21) and a heater (22) connected to the first pneumatic diaphragm valve (21). The end of the first pneumatic diaphragm valve (21) away from the heater (22) is connected to the main gas path (1). The end of the heater (22) away from the first pneumatic diaphragm valve (21) is connected to the valve to be tested (6) through a high-temperature pipeline (23).

3. The high and low temperature valve testing mechanism according to claim 2, characterized in that, The low-temperature test gas path (3) includes a low-temperature pipeline (31) and a second pneumatic diaphragm valve (32) provided on the low-temperature pipeline (31). One end of the low-temperature pipeline (31) is connected to the main gas source path (1), and the other end of the low-temperature pipeline (31) is connected to the high-temperature pipeline (23).

4. The high and low temperature valve testing mechanism according to claim 3, characterized in that, It also includes a first pressure sensor (7) and a second pressure sensor (8) located on both sides of the valve to be tested (6). The first pressure sensor (7) is located on the high-temperature pipeline (23), and the second pressure sensor (8) is located on the detection gas output pipeline (4).

5. The high and low temperature valve testing mechanism according to claim 4, characterized in that, A first temperature sensor (9) is provided between the heater (22) and the first pressure sensor (7), and a second temperature sensor (10) is provided on the side of the second pressure sensor (8) away from the valve (6) to be tested.

6. The high and low temperature valve testing mechanism according to claim 5, characterized in that, The heat dissipation device (5) includes a heat sink (51), a third temperature sensor (52), and a discharge valve (53) arranged sequentially from the air inlet of the detection gas output pipe (4) to the air outlet of the detection gas output pipe (4). The heat sink (51) is located on the side of the second temperature sensor (10) away from the second pressure sensor (8).

7. The high and low temperature valve testing mechanism according to claim 6, characterized in that, It also includes the instrument air circuit; The instrument air circuit includes an instrument air inlet pipe (11) and a first ball valve (12), a pressure regulating valve (13) and a three-way solenoid valve (14) sequentially disposed on the instrument air inlet pipe (11). The three-way solenoid valve (14) is connected to the first pneumatic diaphragm valve (21) and the second pneumatic diaphragm valve (32) respectively.

8. The high and low temperature valve testing mechanism according to claim 7, characterized in that, It also includes an experimental frame, on which the main gas source (1), the high temperature test gas path (2), the low temperature test gas path (3), the detection gas output pipeline (4), and the heat dissipation device (5) are all installed.

9. A high and low temperature valve testing mechanism according to claim 8, characterized in that, It also includes controllers for controlling the temperature of the heater (22) and the switching states and switching times of the first pneumatic diaphragm valve (21), the second pneumatic diaphragm valve (32) and the discharge valve (53), the controllers being electrically connected to the heater (22), the first pneumatic diaphragm valve (21), the second pneumatic diaphragm valve (32), the discharge valve (53), the three-way solenoid valve (14), the first temperature sensor (9), the second temperature sensor (10), the third temperature sensor (52), the first pressure sensor (7) and the second pressure sensor (8), respectively; The controller is located on the experimental rack.

10. A high and low temperature valve testing mechanism according to claim 1, characterized in that, The main gas supply line (1) is equipped with a second ball valve (15) and a flow meter (16).

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