A safety valve pressure measurement system

Abstract

This application discloses a safety valve pressure measurement system, which relates to the field of safety valve technology. The system comprises a test bench, an inflation seat, a fixture, a pressure gauge, and an air source mechanism. The air source mechanism comprises an inflation component and an air extraction component, each of which is connected to the inflation seat via an air pipe. The inflation seat includes a cleaning mechanism for cleaning the inner wall of the safety valve. This application improves the accuracy of the pressure measurement system's monitoring results of the safety valve's allowable pressure value.

Description

Technical Field

[0001] The present application relates to the technical field of safety valves, and in particular to a safety valve pressure measurement system. Background Art

[0002] Safety valves are critical protective devices for boilers, pressure vessels, pipelines, and other pressurized equipment. They prevent pressure in pressurized equipment from exceeding the design allowable value, thereby protecting the equipment and its operators. Safety valve status modes include normally closed, tripped, reseated, and faulty. Prolonged opening, leakage, and improper reseating of safety valves can lead to the release of flammable and explosive gases, placing the plant, employees, and equipment at risk. Therefore, regular safety valve pressure measurements are necessary.

[0003] Reference Figure 1 The instrument used to test the safety valve is a pressure tester, which includes a test bench and an air filling seat, a fixture, a pressure gauge, and an air source mechanism located on the test bench. The fixture fixes the air inlet of the safety valve to the air filling seat. The air source mechanism and the pressure gauge are connected to the air filling seat through an air pipe. The air source mechanism injects gas into the safety valve through the air filling seat, and the pressure gauge monitors the air pressure in the safety valve through the air filling seat. When the air pressure in the safety valve exceeds its design allowable value, the spring in the safety valve is compressed, and the air outlet of the safety valve is opened, allowing the gas to be discharged from the air outlet of the safety valve. As the gas is discharged, the pressure in the safety valve drops to within the design allowable value. At this time, the spring resets and blocks the air outlet of the safety valve, thereby maintaining the pressure in the safety valve stable, so that the pressure gauge can detect the pressure allowable value of the safety valve.

[0004] Regarding the above-mentioned related technologies, since the area near the air inlet of the safety valve is easily contaminated with dust, and the inner wall of the air inlet of the safety valve is easily corroded and produces rust debris, when the air source mechanism and the inflation seat are used to inflate the safety valve, dust, debris, etc. are easily followed by the air flow into the safety valve and attached to the spring or the inner wall of the safety valve, which hinders the expansion and contraction of the spring, thereby affecting the stable expansion and contraction of the spring, and at the same time affecting the monitoring results of the pressure detector on the allowable pressure value of the safety valve. Summary of the Invention

[0005] In order to improve the problem that the presence of impurities at the air inlet of the safety valve affects the monitoring results of the pressure detector on the allowable pressure value of the safety valve, the present application provides a safety valve pressure measurement system.

[0006] The present application provides a safety valve pressure measurement system that adopts the following technical solutions:

[0007] A safety valve pressure measurement system includes a testing platform, an inflation seat, a fixture, a pressure gauge and an air source mechanism. The air source mechanism includes an inflation component and an air extraction component. The inflation component and the air extraction component are respectively connected to the inflation seat through air pipes. A cleaning mechanism for cleaning the inner wall of the safety valve is movably provided in the inflation seat.

[0008] By adopting the above technical solution, the safety valve is placed on the inflation seat and positioned on the inflation seat using a fixture. At this time, outside air can enter the inflation seat through the gap between the safety valve and the inflation seat. Before testing the safety valve, the exhaust assembly and cleaning mechanism are activated. The cleaning mechanism cleans the inner wall of the safety valve, while the exhaust assembly simultaneously exhausts the safety valve. The impurities removed by the exhaust assembly are then removed through the air pipe, improving the cleanliness of the safety valve. Then, use a clamp to press the safety valve against the inflation seat, start the inflation assembly, and the inflation assembly injects gas into the inflation seat through the air pipe. The gas enters the safety valve through the inflation seat without loss, causing the air pressure in the safety valve to increase. When the air pressure in the safety valve exceeds its design allowable value, the spring in the safety valve is compressed, and the air outlet of the safety valve is opened, allowing the gas to be discharged from the air outlet of the safety valve. As the gas is discharged, the air pressure in the safety valve drops to within the design allowable value. At this time, the spring resets and blocks the air outlet of the safety valve, thereby maintaining the pressure in the safety valve stable. At this time, the pressure gauge can detect the allowable pressure value of the safety valve. The safety valve pressure measurement system with the above-mentioned structural design cleans the safety valve in advance to reduce the impact of impurities at the air inlet of the safety valve, thereby affecting the accuracy of the monitoring results of the pressure measurement system on the allowable pressure value of the safety valve.

[0009] Optionally, the fixture includes a plurality of columns, a supporting plate located on the columns, and a clamping assembly for locking and positioning the safety valve. The plurality of columns are adjustably mounted on the inspection platform, and the plurality of columns are arranged around the periphery of the inflatable seat. The inspection platform is provided with a fixing assembly for positioning the columns. The supporting plate is slidably arranged through the columns parallel to the direction of the inspection platform surface, and the supporting plate is located on the side of the inflatable seat away from the inspection platform surface.

[0010] When the inflation assembly is activated, the pressing assembly seals the air inlet of the safety valve against the inflation seat;

[0011] When the air extraction assembly is started, the pressing assembly presses the air inlet of the safety valve against the supporting plate.

[0012] By adopting the above technical solution, when cleaning the safety valve, first place the safety valve between multiple columns, and push multiple support plates toward the safety valve so that the air inlet end of the safety valve is placed on multiple support plates; then adjust the position of the safety valve and the columns so that the safety valve is coaxially placed above the inflation seat, and use a fixing assembly to fix the columns so that the horizontal position of the safety valve is limited; then use a clamping assembly to press the safety valve against the support plate so that the vertical position of the safety valve is limited. At this time, the safety valve is stably aligned and mounted on the inflation seat, and there is a gap between the safety valve and the inflation seat for air to enter. Start the exhaust assembly, which exhausts the inflation seat and the safety valve, so that a negative pressure is formed at the air inlet end of the safety valve, thereby driving impurities at the air inlet of the safety valve to be extracted from the safety valve, thereby improving the cleanliness of the interior of the safety valve.

[0013] After cleaning the safety valve, pull the support plate away from the safety valve and move the safety valve toward the inflation seat. Press the safety valve against the inflation seat through the clamping assembly and start the inflation assembly. The inflation assembly injects gas into the inflation seat through the air pipe. The gas enters the safety valve without loss through the inflation seat, thereby realizing accurate detection of the safety valve pressure.

[0014] Optionally, the cleaning mechanism includes a cleaning rod rotatably arranged in the inflation seat, a rotating assembly that drives the cleaning rod to rotate, and a reciprocating sliding assembly that drives the cleaning rod to move up and down and slide back and forth. The rotating assembly and the reciprocating sliding assembly are both located in the inflation seat, and the reciprocating sliding assembly drives the cleaning rod to be plugged in and out of the air inlet of the safety valve.

[0015] By adopting the above technical solution, when cleaning the inner wall of the safety valve, the rotating assembly and the reciprocating sliding assembly are started, and the reciprocating sliding assembly drives the cleaning rod to be inserted and pulled out at the air inlet of the safety valve, thereby cleaning the air inlet of the safety valve; at the same time, the rotating assembly drives the cleaning rod to rotate, thereby accelerating the cleaning of the inner wall of the safety valve air inlet by the cleaning rod.

[0016] Optionally, the reciprocating sliding assembly includes a rotating cylinder rotatably arranged in the inflation seat, a first blade group installed at the end of the rotating cylinder, a connecting block installed on the cleaning rod and a limit block installed on the inner wall of the inflation seat. A connecting groove is opened on the peripheral wall of the rotating cylinder, and the extension path of the connecting groove encloses an ellipse. The connecting block is slidingly connected to the peripheral wall of the rotating cylinder through the connecting groove, and the cleaning rod slides through the limit block setting along its sliding direction.

[0017] By adopting the above technical solution, when cleaning the safety valve, the vacuum assembly is first started, and the vacuum assembly vacuums the inflation seat and the safety valve, so that there is a rapid flow of air in the inflation seat; the flowing air drives the first blade group to rotate, and the first blade group drives the rotating cylinder to rotate; because the cleaning rod is slidably connected to the connecting groove on the peripheral wall of the rotating cylinder through the connecting block, and the extension path of the connecting groove encloses an elliptical shape, and the cleaning rod is slidably connected to the inflation seat through the limit block; when the rotating cylinder rotates, the connecting block slides in the connecting groove, thereby driving the cleaning rod to slide back and forth in the inflation seat; it is achieved that when the safety valve is vacuumed, the cleaning rod can also be driven to move by the flowing airflow, thereby completing the rapid cleaning of the safety valve.

[0018] Optionally, the rotating assembly includes a mounting tube and a second blade group, the second blade group is fixedly mounted on the cleaning rod, the cleaning rod is rotatably mounted in the mounting tube, and the mounting tube slides through the limit block arrangement.

[0019] By adopting the above technical solution, when cleaning the safety valve, the vacuum assembly is first started, and the vacuum assembly vacuums the inflation seat and the safety valve, so that there is a rapid flow of air in the inflation seat; the flowing air drives the second blade group to rotate, and the second blade group drives the cleaning rod to rotate, so that the rotating cleaning rod can quickly complete the scraping and cleaning of the inner wall of the safety valve.

[0020] Optionally, the fixing assembly includes a plurality of guide rails installed on the surface of the inspection table, a slider for sliding the column onto the guide rails, a rotating disk rotatably installed on the inspection table, and a positioning assembly for locking and positioning the rotating disk. The rotating disk is located on the side of the inspection table surface away from the guide rails. The rotating disk is provided with an arc-shaped rail that is slidably connected to the slider, and one end of the arc-shaped rail points to the center of the rotating disk.

[0021] By adopting the above technical solution, the rotating disk is rotated, and the rotating disk drives the arc rail to rotate relative to the guide rail. Since the slider is not only slidably connected to the guide rail, but also connected to the arc rail; when the arc rail rotates relative to the guide rail, the slider drives the column to slide toward / away from the center of the rotating disk under the joint action of the guide rail and the arc rail; multiple columns are adjusted synchronously, thereby quickly pushing the safety valve to a position aligned with the inflation seat; finally, the rotating disk is locked on the inspection table using the positioning assembly. At this time, the slider is positioned on the inspection table under the joint restriction of the guide rail and the arc rail, and the horizontal movement of the safety valve is restricted under the blocking action of the slider and the column, thereby completing the horizontal position adjustment and locking of the safety valve.

[0022] Optionally, the inflation component is connected to the end of the inflation seat away from the ground through an air pipe, the vacuum component is connected to the end of the inflation seat close to the ground through an air pipe, the first blade group is located on the end of the rotating cylinder close to the ground, and the second blade group is located on the end of the cleaning rod close to the ground.

[0023] By adopting the above technical solution, the vacuum assembly is connected to the end of the inflation seat close to the ground through an air pipe, and the first blade group and the second blade group are both close to the bottom of the inflation seat. When the vacuum assembly is activated, the flowing airflow will drive the first blade group and the second blade group to rotate, thereby allowing the cleaning rod to quickly clean the safety valve. In addition, the flowing airflow will carry the cleaned impurities to the bottom of the inflation seat, reducing the lifting of impurities. The inflation assembly is connected to the end of the inflation seat away from the ground through an air pipe, so that when gas is injected into the safety valve, the gas will not blow up impurities at the bottom of the inflation seat, causing the impurities to re-enter the safety valve.

[0024] Optionally, a locking assembly for locking the cleaning rod is provided on the inflation seat.

[0025] By adopting the above technical solution, since the inflation component will inject gas into the inflation seat and the safety valve when the inflation component is started, the cleaning rod will be locked by the locking component at this time to avoid the movement of the cleaning rod when the gas is injected, thereby disturbing the impurities and causing the impurities to enter the safety valve again.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Before testing the safety valve, start the exhaust assembly and cleaning mechanism. The cleaning mechanism cleans the inner wall of the safety valve, and the exhaust assembly exhausts the safety valve at the same time, so that the cleaned impurities are sucked away by the exhaust assembly through the air pipe, thereby improving the cleanliness of the safety valve.

[0028] 2. When cleaning the inner wall of the safety valve, start the rotating assembly and the reciprocating sliding assembly. The reciprocating sliding assembly drives the cleaning rod to be inserted and pulled out at the air inlet of the safety valve to clean the air inlet of the safety valve; at the same time, the rotating assembly drives the cleaning rod to rotate, speeding up the cleaning of the inner wall of the safety valve air inlet by the cleaning rod;

[0029] 3. The inflation assembly is connected to the end of the inflation seat away from the ground through an air pipe, so that when gas is injected into the safety valve, the gas will not blow up impurities at the bottom of the inflation seat, causing the impurities to enter the safety valve again. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0031] Figure 2 It is a structural diagram of the detection platform, inflation seat, air source mechanism and fixing assembly in the embodiment of the present application.

[0032] Figure 3 1 is an exploded view of the clamp and fixing assembly in an embodiment of the present application.

[0033] Figure 4 It is a structural diagram of the inflation seat, inflation component and exhaust component in the embodiment of the present application.

[0034] Figure 5 It is a schematic cross-sectional view of the inflatable seat in the embodiment of the present application, mainly used to show the cleaning mechanism.

[0035] 1. The air pump of the embodiment of the present invention is as follows: 1. The air pump of the embodiment of the present invention is as follows: 2. The air pump of the embodiment of the present invention is as follows: 3. The air pump of the embodiment of the present invention is as follows: 4. The air pump of the embodiment of the present invention is as follows: 5. The air pump of the embodiment of the present invention is as follows: 6. The air pump of the embodiment of the present invention is as follows: 7. The air pump of the embodiment of the present invention is as follows: 8. The air pump of the embodiment of the present invention is as follows: 1. The air pump of the embodiment of the present invention is as follows: 2. The air pump of the embodiment of the present invention is as follows: 3. The air pump of the embodiment of the present invention is as follows: 4. The air pump of the embodiment of the present invention is as follows: 5. The air pump of the embodiment of the present invention is as follows: 1. The air pump of the embodiment of the present invention is as follows: 2. The air pump of the embodiment of the present invention is as follows: 3. The air pump of the embodiment of the present invention is as follows: 4. The air pump of the embodiment of the present invention is as follows: 5. The air pump of the embodiment of the present invention is as follows: DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-5 This application is described in further detail.

[0037] The embodiment of the present application discloses a safety valve pressure measurement system. Figure 1 and Figure 2 A safety valve pressure measurement system includes a test bench 1, an air-filling seat 2, a fixture 3, a pressure gauge 4, and an air source mechanism 5. The test bench 1 is hollow, and the air-filling seat 2 is cylindrical with one end closed. The open end of the air-filling seat 2 is bonded with a rubber flange ring. The air-filling seat 2 vertically passes through the surface of the test bench 1 and is fixedly welded to the surface of the test bench 1. The closed end of the air-filling seat 2 is located inside the test bench 1. The fixture 3 is located on the surface of the test bench 1. The fixture 3 is used to stably dock the feed end of the safety valve on the open end of the air-filling seat 2. The pressure gauge 4 is fixedly installed on the surface of the test bench 1, and the pressure gauge 4 is connected to the air-filling seat 2 through a conduit. The air source mechanism 5 is located inside the test bench 1. The air source mechanism 5 includes an air-filling component 51 and an air-exhausting component 52. The air-filling component 51 and the air-exhausting component 52 are respectively connected to the air-filling seat 2 through an air pipe 6. A cleaning mechanism 7 for cleaning the inner wall of the safety valve is movably provided in the air-filling seat 2.

[0038] Place the safety valve on the inflatable seat 2 and use the clamp 3 to position the safety valve on the inflatable seat 2. At this time, the outside air can enter the inflatable seat 2 through the gap between the safety valve and the inflatable seat 2. Before testing the safety valve, start the exhaust assembly 52 and the cleaning mechanism 7. The cleaning mechanism 7 cleans the inner wall of the safety valve, and the exhaust assembly 52 exhausts the safety valve at the same time. The cleaned impurities are then extracted by the exhaust assembly 52 through the air pipe 6, improving the cleanliness of the safety valve.

[0039] After the safety valve is cleaned, the pressure test of the safety valve can be started. At this time, the safety valve is pressed against the inflation seat 2 using the clamp 3 so that the outside air cannot enter through the gap between the safety valve and the inflation seat 2. The inflation component 51 is started, and the inflation component 51 injects gas into the inflation seat 2 through the air pipe 6. The gas enters the safety valve through the inflation seat 2 without loss, so that the air pressure in the safety valve increases. When the air pressure in the safety valve exceeds its design allowable value, the spring in the safety valve is compressed, and the air outlet of the safety valve is opened, so that the gas is discharged from the air outlet of the safety valve. As the gas is discharged, the air pressure in the safety valve drops to within the design allowable value. At this time, the spring resets and blocks the air outlet of the safety valve, thereby maintaining the pressure in the safety valve stable. At this time, the pressure gauge 4 can detect the pressure allowable value of the safety valve through the catheter.

[0040] In order to quickly connect the safety valve to the inflation seat 2, refer to Figure 2 and Figure 3 The fixture 3 includes a plurality of columns 31, a support plate 32 located on the columns 31, and a clamping assembly 33 for locking and positioning the safety valve. To achieve a lightweight design and improve the rapid and stable positioning of the safety valve, in the embodiment of the present application, three columns 31 are provided, and the three columns 31 are arranged around the side of the inflatable seat 2. The columns 31 are in an inverted L-shape, and the horizontal ends of the columns 31 point radially toward the inflatable seat 2. The three columns 31 are slidably mounted on the test platform 1 along the radial direction of the inflatable seat 2. The supporting plate 32 slides along the radial direction of the inflatable seat 2 and penetrates the vertical end of the column 31. The distances between the three supporting plates 32 and the surface of the testing table 1 are the same. At the same time, the three supporting plates 32 are all located on the side of the inflatable seat 2 away from the surface of the testing table 1; when the supporting plate 32 slides toward the inflatable seat 2, the side of the supporting plate 32 close to the surface of the testing table 1 slides and abuts against the side of the flange ring on the inflatable seat 2 away from the surface of the testing table 1.

[0041] When the safety valve needs to be cleaned, first place the safety valve between the three columns 31 so that the air inlet end of the safety valve is coaxially arranged with the inflation seat 2; and push the three supporting plates 32 toward the safety valve so that the air inlet end of the safety valve is placed on multiple supporting plates 32. At this time, there is a gap between the air inlet end of the safety valve and the inflation seat 2 for outside air to enter; then start the exhaust component 52, and the exhaust component 52 exhausts the inflation seat 2 and the safety valve, so that impurities in the safety valve are extracted from the safety valve.

[0042] After cleaning the safety valve, you can perform a pressure test on the safety valve. First, pull the support plate 32 away from the safety valve and move the safety valve toward the inflatable seat 2 so that the safety valve is firmly attached to the inflatable seat 2. Then, activate the inflatable assembly 51, which injects gas into the inflatable seat 2 through the air pipe 6. The gas enters the safety valve through the inflatable seat 2 without loss, thereby accurately testing the safety valve pressure.

[0043] To ensure that the safety valve is in a stable position when cleaning the inner wall of the safety valve or performing pressure testing; Figure 2 and Figure 3 The clamping assembly 33 is located on the horizontal end of the column 31, and the clamping assembly 33 can limit the position of the safety valve in the vertical direction. At the same time, a fixing assembly 8 for positioning the column 31 is provided on the detection platform 1, and the fixing assembly 8 can limit the position of the safety valve in the horizontal direction.

[0044] Reference Figure 2 and Figure 3 In the embodiment of the present application, the clamping assembly 33 includes a clamping screw and a rubber pad. The clamping screw is vertical and threaded through the horizontal end of the pillar 31. The rubber pad is adhesively fixed to the end of the clamping screw that is closest to the surface of the test bench 1. When the clamping screw is rotated, the clamping screw, through the rubber pad, clamps the flange at the air inlet end of the safety valve against the support plate 32 or the flange ring of the inflatable seat 2. In other embodiments, the clamping assembly 33 may be an electric push rod, a hydraulic cylinder, a pneumatic cylinder, etc.

[0045] In order to quickly position and fix the safety valve on the same axis as the inflation seat 2, refer to Figure 2 and Figure 3The fixing assembly 8 includes a plurality of guide rails 81 mounted on the surface of the testing platform 1, a slider 82 for sliding the column 31 onto the guide rail 81, a rotary disk 83 rotatably mounted on the testing platform 1, and a positioning assembly 84 for locking and positioning the rotary disk 83. There are three guide rails 81, and the three guide rails 81 are evenly distributed along the circumference of the inflatable seat 2. The three guide rails 81 are formed by three fan-shaped pieces, there is a gap between two adjacent fan-shaped pieces, and the gap between two adjacent fan-shaped pieces constitutes the guide rail 81. The length direction of the guide rail 81 is consistent with the radial direction of the inflatable seat 2, and the guide rail 81 is located on the side of the testing platform 1 surface away from the ground. A perforation is provided on the testing platform 1 surface at the guide rail 81, the width dimension of the perforation is larger than the width dimension of the guide rail 81, and the extension direction of the perforation is consistent with the extension direction of the guide rail 81.

[0046] Reference Figure 2 and Figure 3 The rotating disk 83 is rotatably mounted on the test platform 1 via a bearing. The rotating disk 83 is located on the side of the test platform 1 closest to the ground. The rotating disk 83 is coaxial with the inflatable seat 2, and the inflatable seat 2 is penetrated by the rotating disk 83. Three curved rails 10 are provided on the end surface of the rotating disk 83 close to the test platform 1. The three curved rails 10 are evenly distributed along the central axis of the rotating disk 83, and one end of the curved rail 10 points to the center of the rotating disk 83.

[0047] Reference Figure 2 and Figure 3 The slider 82 includes a T-block welded to the end of the column 31 and a slide rod fixed to the T-block. The T-block is slidably installed in the guide rail 81 and the through hole. The slide rod passes through the through hole and is slidably inserted into the arc rail 10.

[0048] Reference Figure 2 and Figure 3 The positioning assembly 84 includes an ear plate 841 mounted on the peripheral wall of the rotating disk 83 and a butterfly screw 842 threaded through the ear plate 841. Rotating the butterfly screw 842 causes it to move toward the surface of the testing table 1 and abut against it. The friction between the butterfly screw 842 and the surface of the testing table 1 quickly locks the rotating disk 83 to the surface of the testing table 1.

[0049] When the rotating disk 83 is rotated to make the arc rail 10 rotate relative to the guide rail 81, the slider 82 drives the column 31 to slide toward / away from the center of the rotating disk 83 under the joint action of the guide rail 81 and the arc rail 10; the three columns 31 are adjusted synchronously, thereby quickly pushing the safety valve to a position aligned with the inflation seat 2; finally, the positioning component 84 is used to lock the rotating disk 83 on the inspection table 1, so that the horizontal movement of the safety valve is restricted under the blocking action of the slider 82 and the column 31, thereby completing the horizontal position adjustment and locking of the safety valve.

[0050] After completing the positioning and locking of the safety valve, the cleaning mechanism 7 can be used to clean and pressure test the safety valve. In order to avoid interference between the cleaning process and the pressure test process, refer to Figure 4 and Figure 5 A two-way air pump 12 is also installed in the test bench 1. The inflation assembly 51 includes a first pipe 511 connected to the air outlet of the two-way air pump 12 and a first electric valve 512 located on the first pipe 511. The end of the first electric valve 512 away from the first pipe 511 is connected to the air pipe 6, and the end of the air pipe 6 away from the first electric valve 512 is connected to the side wall of the inflation seat 2 away from the ground. The exhaust assembly 52 includes a second pipe 521 connected to the air inlet of the two-way air pump 12 and a second electric valve 522 located on the second pipe 521. The end of the second electric valve 522 away from the second pipe 521 is connected to the air pipe 6, and the end of the air pipe 6 away from the second electric valve 522 is connected to the bottom wall of the inflation seat 2. When the safety valve is exhausted, impurities will accumulate at the bottom of the inflation seat 2. When the safety valve is inflated, impurities at the bottom of the inflation seat 2 are prevented from being flushed into the safety valve again as much as possible.

[0051] In order to improve the utilization of resources and improve the cleaning efficiency of safety valves, refer to Figure 5 The cleaning mechanism 7 includes a cleaning rod 71 rotatably mounted within the inflatable seat 2, a rotating assembly 72 that drives the cleaning rod 71 to rotate, and a reciprocating sliding assembly 73 that drives the cleaning rod 71 to move up and down. The cleaning rod 71 is configured as a rod with a brush at one end. Both the rotating assembly 72 and the reciprocating sliding assembly 73 are located within the inflatable seat 2. The reciprocating sliding assembly 73 drives the cleaning rod 71 to be inserted and removed from the air inlet of the safety valve.

[0052] Reference Figure 4 and Figure 5The reciprocating sliding assembly 73 includes a rotating cylinder 731 rotatably mounted within the inflatable seat 2, a first blade assembly 732 mounted on the end of the rotating cylinder 731 close to the ground, a connecting block 733 mounted on the cleaning rod 71, and a stop block 734 mounted on the inner wall of the inflatable seat 2. The rotating cylinder 731 is rotatably mounted on the inner wall of one side of the inflatable seat 2 via a rotating shaft, and the stop block 734 is bonded to the inner wall of the other side of the inflatable seat 2. The rotating axis of the rotating cylinder 731 is parallel to the central axis of the inflatable seat 2. A connecting groove 9 is provided on the outer peripheral wall of the rotating cylinder 731. The extending path of the connecting groove 9 encloses an elliptical shape, and the depth of the connecting groove 9 is the same at all locations. The plane where the connecting groove 9 is located forms an acute angle with the end face of the rotating cylinder 731.

[0053] Reference Figure 4 and Figure 5 The rotating assembly 72 includes a mounting tube 721 and a second blade group 722. The mounting tube 721 is slidably provided with a limit block 734, and the length direction of the mounting tube 721 and its sliding direction are consistent with the length direction of the central axis of the inflatable seat 2; at the same time, the mounting tube 721 is located on the central axis of the inflatable seat 2. One end of the connecting block 733 is welded and fixed to the side wall of the mounting tube 721, and the other end is slidably connected to the peripheral wall of the rotating tube 731 through the connecting groove 9. The end of the cleaning rod 71 away from its brush passes through the mounting tube 721 and points to the ground. At the same time, the cleaning rod 71 is rotatably installed in the mounting tube 721 through a bearing; the second blade group 722 is coaxially fixed to the end of the cleaning rod 71 close to the ground.

[0054] When the air extraction assembly 52 is activated, the flowing airflow drives the first blade assembly 732 and the second blade assembly 722 to rotate. The second blade assembly 722 drives the cleaning rod 71 to rotate, and the first blade assembly 732 drives the rotating cylinder 731 to rotate. When the rotating cylinder 731 rotates, the connecting block 733 slides in the connecting groove 9, thereby driving the cleaning rod 71 to slide back and forth in the inflation seat 2, so that the rotating cleaning rod 71 is inserted and removed from the air inlet of the safety valve, thereby quickly cleaning the inner wall of the safety valve.

[0055] Since it is necessary to inject gas into the safety valve through the inflation assembly 51 when the pressure of the safety valve is tested, in order to avoid the flow of gas driving the cleaning rod 71 to move in the inflation seat 2 as much as possible, Figure 4 and Figure 5 The inflatable seat 2 is provided with a locking assembly 11 for locking the cleaning rod 71. The locking assembly 11 includes two limit screws, which correspond to the rotating shaft of the rotating cylinder 731 and the rod body of the cleaning rod 71 respectively. The limit screws are threaded through the side wall of the inflatable seat 2 in the radial direction of the inflatable seat 2 and abut against the rotating shaft of the rotating cylinder 731 or the rod body of the cleaning rod 71, thereby limiting the lifting, sliding, and rotation of the cleaning rod 71.

[0056] The implementation principle of a safety valve pressure measurement system according to an embodiment of the present application is as follows: when the safety valve needs to be cleaned, the safety valve is first placed between the three columns 31 so that the air inlet end of the safety valve is coaxially arranged with the air-filling seat 2; and the three supporting plates 32 are pushed toward the safety valve; then the rotating disk 83 is rotated so that the three columns 31 drive the supporting plates 32 to adjust their positions toward the air-filling seat 2 simultaneously; so that the three columns 31 position the safety valve directly above the air-filling seat 2, and at the same time, the air inlet end of the safety valve is placed on the three supporting plates 32. At this time, there is a gap between the air inlet end of the safety valve and the air-filling seat 2 for the outside air to enter. The rotating disk 83 is then locked by the butterfly screw 842, and the flange of the air inlet end of the safety valve is pressed against the supporting plate 32 by the tightening screw.

[0057] The vacuum assembly 52 is then activated to vacuum the inflatable seat 2 and the safety valve. The flowing airflow drives the first blade assembly 732 and the second blade assembly 722 to rotate. The second blade assembly 722 drives the cleaning rod 71 to rotate, and the first blade assembly 732 drives the rotating cylinder 731 to rotate. When the rotating cylinder 731 rotates, the connecting block 733 slides in the connecting groove 9, thereby driving the cleaning rod 71 to slide back and forth in the inflatable seat 2, so that the rotating cleaning rod 71 is inserted and removed from the air inlet of the safety valve, thereby quickly cleaning the inner wall of the safety valve and also allowing impurities in the safety valve to be extracted from the safety valve.

[0058] After the safety valve is cleaned, the pressure test can be performed on the safety valve. At this time, the support plate 32 is first pulled away from the safety valve, and the safety valve is moved toward the inflation seat 2. The flange at the air inlet end of the safety valve is tightened and fixed to the flange ring of the inflation seat 2 by tightening the screws. Then the inflation assembly 51 is started. The inflation assembly 51 injects gas into the inflation seat 2 through the air pipe 6. The gas enters the safety valve through the inflation seat 2 without loss, causing the air pressure in the safety valve to increase. When the air pressure in the safety valve exceeds its design allowable value, the spring in the safety valve is compressed. At this time, the air outlet of the safety valve is opened, allowing the gas to be discharged from the air outlet of the safety valve. As the gas is discharged, the air pressure in the safety valve drops to within the design allowable value. At this time, the spring resets and blocks the air outlet of the safety valve, thereby maintaining the pressure in the safety valve stable. At this time, the pressure gauge 4 can detect the pressure allowable value of the safety valve.

[0059] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A safety valve pressure measurement system, comprising a test bench (1), an air filling seat (2), a fixture (3), a pressure gauge (4) and an air source mechanism (5), characterized in that: The air source mechanism (5) comprises an air filling component (51) and an air extraction component (52), the air filling component (51) and the air extraction component (52) are respectively connected to the air filling seat (2) via an air pipe (6), and a cleaning mechanism (7) for cleaning the inner wall of the safety valve is movably provided in the air filling seat (2); The fixture (3) includes a plurality of columns (31), a supporting plate (32) located on the columns (31) and a clamping assembly (33) for locking and positioning the safety valve, the plurality of columns (31) are adjustably mounted on the test bench (1), and the plurality of columns (31) are arranged around the periphery of the inflatable seat (2), the test bench (1) is provided with a fixing assembly (8) for positioning the columns (31), the supporting plate (32) is arranged to slide through the columns (31) in parallel with the surface of the test bench (1), and the supporting plate (32) is located on the side of the inflatable seat (2) away from the surface of the test bench (1); When the inflation component (51) is activated, the pressing component (33) seals the air inlet of the safety valve against the inflation seat (2); When the air extraction component (52) is activated, the pressing component (33) presses the air inlet of the safety valve against the supporting plate (32); The cleaning mechanism (7) includes a cleaning rod (71) rotatably arranged in the inflation seat (2), a rotating assembly (72) driving the cleaning rod (71) to rotate, and a reciprocating sliding assembly (73) driving the cleaning rod (71) to reciprocate, lift and slide. The rotating assembly (72) and the reciprocating sliding assembly (73) are both located in the inflation seat (2). The reciprocating sliding assembly (73) drives the cleaning rod (71) to be inserted and removed from the air inlet of the safety valve. The reciprocating sliding assembly (73) includes a rotating cylinder (731) rotatably arranged in the inflation seat (2), a first blade group (732) installed at the end of the rotating cylinder (731), a connecting block (733) installed on the cleaning rod (71), and a limit block (734) installed on the inner wall of the inflation seat (2); a connecting groove (9) is provided on the peripheral wall of the rotating cylinder (731); the extending path of the connecting groove (9) is enclosed to form an ellipse; the connecting block (733) is slidingly connected to the peripheral wall of the rotating cylinder (731) through the connecting groove (9); and the cleaning rod (71) slides along its sliding direction to pass through the limit block (734); The rotating assembly (72) comprises a mounting cylinder (721) and a second blade group (722), the second blade group (722) being fixedly mounted on the cleaning rod (71), the cleaning rod (71) being rotatably mounted in the mounting cylinder (721), and the mounting cylinder (721) being slidably mounted to penetrate the limit block (734); The fixing assembly (8) comprises a plurality of guide rails (81) mounted on the surface of the inspection table (1), a slider (82) for slidingly mounting the column (31) on the guide rails (81), a rotating disk (83) rotatably mounted on the inspection table (1), and a positioning assembly (84) for locking and positioning the rotating disk (83), wherein the rotating disk (83) is located on a side of the inspection table (1) surface away from the guide rails (81), and an arc-shaped rail (10) is provided on the rotating disk (83) and is slidably connected to the slider (82), and one end of the arc-shaped rail (10) points to the center of the rotating disk (83).

2. A safety valve pressure measurement system according to claim 1, characterized in that: The inflation component (51) is connected to the end of the inflation seat (2) away from the ground through the air pipe (6), and the exhaust component (52) is connected to the end of the inflation seat (2) close to the ground through the air pipe (6). The first blade group (732) is located on the end of the rotating cylinder (731) close to the ground, and the second blade group (722) is located on the end of the cleaning rod (71) close to the ground.

3. A safety valve pressure measurement system according to claim 1, characterized in that: The inflation seat (2) is provided with a locking assembly (11) for locking the cleaning rod (71).

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