A reliability testing device for pressure reducer

Abstract

The present invention discloses a pressure reducer reliability test device, which belongs to the technical field of pressure reducer detection, and includes a visual inspection module and a test bench equipped with pneumatic elements, wherein a temperature difference simulation seat is provided on the test bench, a refrigeration device and a heating device are provided on the temperature difference simulation seat, and the temperature difference simulation seat is used to adjust the temperature of the pressure reducer, and the temperature difference simulation seat is connected to a test disk through an intermittent driving device, and a plurality of test slots are provided on the test disk, and a mounting limiter for mounting the pressure reducer is connected inside the test slot through a support. The present invention changes the temperature of the pressure reducer under test by providing a heating device and a refrigeration device in the temperature difference simulation seat, adjusting the temperature regularly by rotating the test disk, frequently controlling the temperature difference change, controlling the airflow of the pressure reducer by a high-pressure solenoid valve and a low-pressure solenoid valve, and obtaining data on the influence of the temperature difference on the reliability of the pressure reducer by reading the pressure gauge of the pressure reducer through the visual inspection module.

Description

Technical Field

[0001] The invention relates to the technical field of pressure reducer detection, and in particular to a pressure reducer reliability testing device. Background Art

[0002] A pressure reducer is a regulating device that reduces high-pressure gas to low-pressure gas and keeps the pressure and flow of the output gas stable. It is divided into many types of pressure reducers according to different types of gases.

[0003] The function of the pressure reducer is to reduce the pressure and transmit it at a constant pressure. The gas in the tank is usually in liquid form. In the process of converting liquid gas into gaseous gas, it absorbs heat, which makes the surface temperature of the pressure reducer very low when it is performing pressure reduction work. In severe cases, frost will accumulate on the surface. When it is not working, it will gradually return to room temperature, and there is a large temperature difference. The elastic film device inside the pressure reducer is mainly made of rubber. Under long-term use, frequent temperature changes will affect its use effect. The elastic film device has leakage and inaccurate pressure regulation. In order to explore the impact of frequent temperature differences on the performance of the pressure reducer, a reliability test device for a pressure reducer is proposed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the elastic film device inside the pressure reducer is mainly made of rubber material, and frequent temperature changes will affect its use effect under long-term use, and the elastic film device has leakage and inaccurate pressure regulation. A pressure reducer reliability testing device is proposed.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A pressure reducer reliability test device, comprising a visual inspection module and a test bench equipped with pneumatic elements, wherein the test bench is provided with a temperature difference simulation seat, the temperature difference simulation seat is provided with a refrigeration device and a heating device for adjusting the temperature of the pressure reducer, the temperature difference simulation seat is connected with a test disk through an intermittent drive device, the test disk is provided with a plurality of test slots, the inside of the test slots is connected with an installation limiter for installing the pressure reducer through a support, and the installation limiter is provided with an adjustable automatic rotating member for controlling the rotation of a control valve stem of the pressure reducer;

[0007] A controllable solenoid valve is arranged in the test slot, and the controllable solenoid valve includes a high-pressure solenoid valve and a low-pressure solenoid valve, and the high-pressure solenoid valve and the low-pressure solenoid valve are both provided with connectors, and the connectors located on the high-pressure solenoid valve and the low-pressure solenoid valve are respectively connected to the high-pressure end and the low-pressure end of the pressure reducer, and the controllable solenoid valve is provided with an induction switch, and the temperature difference simulation seat is provided with an induction annular groove used in conjunction with the induction switch;

[0008] The experimental test bench is provided with a support frame, the support frame is connected to a test cover plate through a rotary control component, and the visual inspection module is installed on the bottom of the test cover plate.

[0009] Preferably, the temperature difference simulation seat is provided with two fan-shaped heat exchange ports adapted to the test slots, and the refrigeration device and the heating device are both connected with output heat exchange devices, and the two output heat exchange devices are respectively arranged in the fan-shaped heat exchange ports on both sides.

[0010] Preferably, the intermittent driving device comprises a servo motor arranged on the temperature difference simulation seat, and the output end of the servo motor is fixedly connected with a driving gear;

[0011] The temperature difference simulation seat is rotatably connected to the test disc via a connecting ring, and the outer side wall of the test disc is fixedly connected to a driving gear ring meshing with a driving gear.

[0012] Preferably, the installation limit member includes a limit base ring, which is threadably connected to a limit cover, and a plurality of positioning slots are provided on the limit base ring for fixing the pressure reducer. The limit base ring is hollowed out to facilitate rapid temperature replacement.

[0013] Preferably, the adjustable automatic rotating member comprises a rotating collar rotatably arranged on the limit cover, and an inner side wall of the rotating collar is provided with an adaptable rubber sleeve for increasing the friction with the control valve stem.

[0014] Preferably, a tightening gear and a loosening gear are fixedly provided on the outer side wall of the rotating sleeve, an outer ring body meshingly connected to the tightening gear is fixedly connected to the bottom of the test cover plate, and an inner ring body meshingly connected to the loosening gear is fixedly connected, and a plurality of meshing tooth layers are provided on the outer ring body and the inner ring body.

[0015] Preferably, a trigger for triggering an inductive switch is arranged on the inner wall of the inductive annular groove, and the inductive switch is arranged at the bottom of the controllable solenoid valve, which is inside the inductive annular groove.

[0016] Preferably, the rotary control assembly comprises a rotating nut ring rotatably arranged on a support frame, an inner side wall of the rotating nut ring is threadedly connected with an adjusting stud, and a bottom of the adjusting stud is fixedly connected to a top of a test cover plate.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention detects the influence of large temperature difference before and after the operation of the pressure reducer on the reliability of the pressure reducer itself. A heating device and a cooling device are arranged in a temperature difference simulation seat to change the temperature of the pressure reducer under test, and the temperature difference change is frequently controlled by rotating the test disk. The airflow of the pressure reducer is controlled by a high-pressure solenoid valve and a low-pressure solenoid valve. The reading of the pressure gauge of the pressure reducer is measured by a visual detection module to obtain data on the influence of the temperature difference on the reliability of the pressure reducer.

[0019] 2. The present invention changes the position of the pressure reducer by rotating the test disk, and during the rotation process, drives the rotating ring connected to the control valve body on the pressure reducer to revolve, and under the action of the outer ring body and the inner ring body, respectively realizes the rotation of the tightening gear and the loosening gear, realizes the automatic switching of the pressure reducer valve body, and controls the airflow through the high-pressure solenoid valve and the low-pressure solenoid valve, so as to achieve simultaneous multiple tests of the pressure reducer, and realize fast and effective reliability testing of the pressure reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main assembly structure of a pressure reducer reliability testing device proposed by the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 3 A schematic diagram of the three-dimensional structure of a pressure reducer reliability testing device proposed by the present invention;

[0023] Figure 4 This is a schematic structural diagram of the connection relationship between the installation limiter and the adjustable automatic rotating member in a pressure reducer reliability testing device proposed by the present invention;

[0024] Figure 5 It is a structural schematic diagram of an adjustable automatic rotating part in a pressure reducer reliability testing device proposed by the present invention;

[0025] Figure 6 It is a schematic cross-sectional structure diagram of a temperature difference simulation seat in a pressure reducer reliability testing device proposed by the present invention;

[0026] Figure 7 for Figure 6 A schematic diagram of the enlarged structure at B in the middle;

[0027] Figure 8 This is a schematic structural diagram of a controllable solenoid valve in a pressure reducer reliability testing device proposed by the present invention;

[0028] Fig. 9 The pneumatic pipeline connection diagram of the pressure reducer in the present invention.

[0029] In the figure: 1. Test bench; 2. Temperature difference simulation seat; 3. Refrigeration device; 4. Heating device; 5. Test plate; 6. Test slot; 7. Support; 8. High-pressure solenoid valve; 9. Low-pressure solenoid valve; 10. Connector; 11. Induction switch; 12. Induction annular groove; 13. Support frame; 14. Test cover; 15. Visual inspection module; 16. Fan-shaped heat exchange port; 17. Output heat exchange device; 18. Servo motor; 19. Drive gear; 20. Connecting ring; 21. Drive gear ring; 22. Limit base ring; 23. Limit cover; 24. Positioning slot; 25. Rotating sleeve; 26. Adapter rubber sleeve; 27. Tighten the gear; 28. Loosen the gear; 29. ​​Outer ring; 30. Inner ring; 31. Trigger; 32. Adjustment stud. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described 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 the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Example, see Figures 1 to 9A pressure reducer reliability test device includes a visual inspection module 15 and a test bench 1 with pneumatic components installed, a temperature difference simulation seat 2 is provided on the test bench 1, a refrigeration device 3 and a heating device 4 are provided on the temperature difference simulation seat 2, and are used to adjust the temperature of the pressure reducer, wherein the pneumatic components, the refrigeration device 3 and the heating device 4 are all prior arts, and will not be described in detail here;

[0034] It is worth noting that the pneumatic components include a high-pressure air pump and its pipeline, wherein the pipeline of the high-pressure air pump extends upward from the center of the test bench 1, and passes through the temperature difference simulation seat 2 to be effectively connected with a plurality of high-pressure solenoid valves 8 arranged on the test plate 5;

[0035] Furthermore, two fan-shaped heat exchange ports 16 adapted to the test slots 6 are provided on the temperature difference simulation seat 2, and both the refrigeration device 3 and the heating device 4 are connected to output heat exchange devices 17, and the two output heat exchange devices 17 are respectively arranged in the fan-shaped heat exchange ports 16 on both sides.

[0036] The temperature difference simulation seat 2 is connected to the test plate 5 through an intermittent driving device. Further, the intermittent driving device includes a servo motor 18 arranged on the temperature difference simulation seat 2, and the output end of the servo motor 18 is fixedly connected to a driving gear 19;

[0037] The temperature difference simulation seat 2 is rotatably connected to the test disc 5 via a connecting ring 20 , and a driving gear ring 21 meshingly connected to the driving gear 19 is fixedly connected to the outer side wall of the test disc 5 .

[0038] It is worth noting that the servo motor 18 is driven intermittently, and its output end controls the rotation of the driving gear 19, thereby driving the driving gear ring 21 meshing with it to rotate, which will cause the test disk 5 connected to the driving gear ring 21 to be driven to rotate, wherein the rotation of the test disk 5 is 1 / 4 turn and then stops, providing time for staged heat exchange.

[0039] The test plate 5 is provided with a plurality of test slots 6, and the inside of the test slots 6 is connected with a mounting limiter for mounting a pressure reducer through a support member 7, wherein the support member 7 is hollowed out to facilitate rapid heat exchange;

[0040] Furthermore, the installation limiter includes a limit base ring 22, which is threadably connected to a limit cover 23, and a plurality of positioning slots 24 are provided on the limit base ring 22 for fixing the pressure reducer. The limit base ring 22 is hollowed out to facilitate rapid temperature replacement.

[0041] It is worth noting that the number of the positioning slots 24 provided on the limit base ring 22 is determined according to the number of pipelines connected to the valve body of the pressure reducer. When installing, the valve body is placed on the limit base ring 22. By rotating the limit cover 23, the pressure reducer installed on the limit base ring 22 is effectively fixed by the threaded limit cover 23. During the fixing process, the control valve stem on the pressure reducer is effectively fixed to the rotating ring 25 provided on the limit cover 23, so that the control valve stem is driven by the rotation of the rotating ring 25 to perform the switching action of the pressure reducer valve body.

[0042] The installation limiter is provided with an adjustable automatic rotating member for controlling the control valve stem of the pressure reducer to rotate;

[0043] Furthermore, the adjustable automatic rotating member includes a rotating collar 25 rotatably disposed on the limiting cover 23 , and an adaptable rubber sleeve 26 for increasing the friction force with the control valve stem is disposed on the inner side wall of the rotating collar 25 .

[0044] The setting of the adaptive rubber sleeve 26, under the premise of increasing the friction between the control valve stem of the pressure reducer, can also realize the relative rotation between the rotating ring 25 and the control valve stem when a large torque is applied by the limit cover 23, thereby satisfying the requirements of tightening the valve body of the pressure reducer while avoiding damage to the valve body caused by over-tightening.

[0045] Furthermore, a tightening gear 27 and a loosening gear 28 are fixedly provided on the outer wall of the rotating ring 25, and an outer ring body 29 meshingly connected to the tightening gear 27 is fixedly connected to the bottom of the test cover 14, and an inner ring body 30 meshingly connected to the loosening gear 28 is fixedly connected, and multiple meshing tooth layers are provided on the outer ring body 29 and the inner ring body 30.

[0046] When it is necessary to rotate the tightening gear 27 and the loosening gear 28, it is only necessary to set the meshing tooth layer at the corresponding position. When the test disk 5 is rotating, it will drive the rotating ring 25 to rotate around the test disk 5. During the revolution, the tightening gear 27 and the loosening gear 28 will contact the meshing tooth layer and will be driven to rotate, thereby achieving the effect of forward and reverse rotation of the control valve stem of the pressure reducer.

[0047] A controllable solenoid valve is arranged in the test slot 6, and the controllable solenoid valve includes a high-pressure solenoid valve 8 and a low-pressure solenoid valve 9. Both the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9 are provided with a connector 10. The connectors 10 located on the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9 are respectively connected to the high-pressure end and the low-pressure end of the pressure reducer. An induction switch 11 is arranged on the controllable solenoid valve, and an induction annular groove 12 used in conjunction with the induction switch 11 is provided on the temperature difference simulation seat 2. The specific position relationship can be referred to Figure 7 ;

[0048] Furthermore, a trigger 31 for triggering the sensing switch 11 is provided on the inner wall of the sensing annular groove 12. The sensing switch 11 is provided at the bottom of the controllable solenoid valve and is located inside the sensing annular groove 12. When the sensing switch 11 moves to the trigger 31, it controls the controllable solenoid valve to switch.

[0049] It should be noted that there are two types of triggers 31, which correspond to the induction switches 11 set on the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9 respectively. When the induction switch 11 set at the bottom of the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9 rotates to the trigger 31 in the induction annular groove 12, the corresponding induction will be realized, thereby controlling the switching of the controllable solenoid valve.

[0050] A support frame 13 is provided on the test bench 1, and the support frame 13 is connected to a test cover plate 14 through a rotary control assembly. A visual inspection module 15 is installed at the bottom of the test cover plate 14, wherein the visual inspection module 15 can recognize the positions indicated by the pointers on the high-pressure gauge and the low-pressure gauge on the pressure reducer. This is an existing visual inspection technology and will not be elaborated on here. It can accurately reflect the numerical changes of the pressure reducer.

[0051] Furthermore, the rotary control assembly includes a rotating nut ring rotatably set on the support frame 13, and the inner wall of the rotating nut ring is threadedly connected with an adjustment stud 32. The bottom of the adjustment stud 32 is fixedly connected to the top of the test cover 14 to achieve the change of the height of the test cover 14. In order to ensure the up and down movement of the test cover 14, a structure can be set to limit the rotation of the test cover 14.

[0052] In this solution, the position of the trigger 31 in the inductive annular groove 12 and the position of the meshing tooth layer on the outer ring body 29 and the inner ring body 30 can be adjusted according to actual needs.

[0053] refer to Fig. 9 When testing the pressure reducer, the present invention installs the pressure reducer with the front side facing upward, so that the visual detection module 15 can recognize and read the value of the pressure gauge on the pressure reducer, and the valve body of the pressure reducer is installed on the limit base ring 22. By rotating the limit cover 23, the pressure reducer is firmly installed on the limit base ring 22, and the connectors 10 on the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9 are respectively connected to the interfaces of the high-pressure end and the low-pressure end of the pressure reducer, so as to complete the effective installation of the pressure reducer, and realize the installation of multiple pressure reducers in the test slot 6 one by one, so as to realize the synchronous detection of multiple pressure reducers;

[0054] During the test, the two test slots 6 are heated and cooled respectively by the refrigeration device 3 and the heating device 4 arranged in the temperature difference simulation seat 2. At this time, the servo motor 18 is controlled to rotate the test disc 5 through the driving gear 19 and the driving gear ring 21, and the positions of the pressure reducers in different test slots 6 are changed one by one, thereby changing the temperature of the pressure reducer. During the continuous intermittent transmission process, the pressure reducer arranged on the test disc 5 will undergo frequent changes in the temperature difference between hot and cold, thereby simulating the influence of the temperature on the pressure reducer under long-term use;

[0055] During the test, the reliability of the pressure reducer will be tested synchronously. When the test disk 5 rotates, the rotating collar 25 connected to the mounting limiter will be driven to revolve. During the revolving process, the tightening gear 27 and the loosening gear 28 provided on the rotating collar 25 will respectively contact the meshing tooth layers provided on the outer ring body 29 and the inner ring body 30 during the revolving process. During the contacting process, the control valve stem of the pressure reducer will be rotated forward and reverse respectively, thereby realizing the switching effect of the valve body of the pressure reducer.

[0056] The switching effect of the pressure reducer valve body is synchronized with the opening and closing of the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9, so that multiple tests of the pressure reducer can be carried out simultaneously, which specifically includes the following processes:

[0057] The sealing performance of the pressure reducer is tested by combining the temperature difference simulation: the valve body of the pressure reducer is driven to close by tightening the rotation of the gear 27, the high-pressure solenoid valve 8 is opened, the air pump is turned on to supply air to the high-pressure solenoid valve 8, and then the air pump is stopped. By exploring whether the pointer of the high-pressure gauge moves, it can be concluded whether the pressure reducer is leaking;

[0058] When exploring the pressure load of the pressure reducer, the valve body of the pressure reducer can be opened by loosening the rotation of the gear 28, and the high-pressure solenoid valve 8 and the low-pressure solenoid valve 9 are opened synchronously. The gas is pressurized by the air pump to explore the reliability of the pressure reducing effect of the pressure reducer;

[0059] By applying changes in the size of the air pump pressure and opening the low-pressure solenoid valve 9 when the valve body of the pressure reducer is closed, the accuracy of the low-pressure gauge and the high-pressure gauge can be explored. The high-pressure gauge will adjust with the changes in the air pump pressure. When the low-pressure solenoid valve 9 is opened, the air in the low-pressure gauge will be discharged and the low-pressure gauge will return to zero, thereby exploring the reliability of the pressure reducer.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pressure reducer reliability testing device, comprising a visual inspection module (15) and a test bench (1) equipped with pneumatic components, characterized in that: The test bench (1) is provided with a temperature difference simulation seat (2), the temperature difference simulation seat (2) is provided with a refrigeration device (3) and a heating device (4) for adjusting the temperature of the pressure reducer, the temperature difference simulation seat (2) is connected to a test disk (5) via an intermittent drive device, the test disk (5) is provided with a plurality of test slots (6), the inside of the test slots (6) is connected to a mounting stopper for mounting the pressure reducer via a support member (7), and the mounting stopper is provided with an adjustable automatic rotating member for controlling the rotation of a control valve stem of the pressure reducer; A controllable solenoid valve is arranged in the test slot (6), the controllable solenoid valve comprising a high-pressure solenoid valve (8) and a low-pressure solenoid valve (9), the high-pressure solenoid valve (8) and the low-pressure solenoid valve (9) are both provided with a connector (10), the connector (10) located on the high-pressure solenoid valve (8) and the low-pressure solenoid valve (9) are respectively connected to the high-pressure end and the low-pressure end of the pressure reducer, the controllable solenoid valve is provided with an induction switch (11), and the temperature difference simulation seat (2) is provided with an induction annular groove (12) used in conjunction with the induction switch (11); A support frame (13) is provided on the test bench (1); the support frame (13) is connected to a test cover plate (14) via a rotary control assembly; and the visual inspection module (15) is installed at the bottom of the test cover plate (14).

2. A pressure reducer reliability testing device according to claim 1, characterized in that: The temperature difference simulation seat (2) is provided with two fan-shaped heat exchange ports (16) adapted to the test slots (6); the refrigeration device (3) and the heating device (4) are both connected to output heat exchange devices (17); the two output heat exchange devices (17) are respectively arranged in the fan-shaped heat exchange ports (16) on both sides.

3. A pressure reducer reliability testing device according to claim 1, characterized in that: The intermittent drive device comprises a servo motor (18) arranged on the temperature difference simulation seat (2), and the output end of the servo motor (18) is fixedly connected to a driving gear (19); The temperature difference simulation seat (2) is rotatably connected to the test disc (5) via a connecting ring (20), and a driving gear ring (21) meshingly connected to the driving gear (19) is fixedly connected to the outer side wall of the test disc (5).

4. A pressure reducer reliability testing device according to claim 1, characterized in that: The installation limiter comprises a limit base ring (22), the limit base ring (22) being threadably connected to a limit cover (23), a plurality of positioning slots (24) being provided on the limit base ring (22) for fixing the pressure reducer, and the limit base ring (22) being hollowed out to facilitate rapid temperature replacement.

5. A pressure reducer reliability testing device according to claim 4, characterized in that: The adjustable automatic rotating member comprises a rotating collar (25) rotatably arranged on a limit cover (23), and an inner side wall of the rotating collar (25) is provided with an adaptable rubber sleeve (26) for increasing friction with the control valve stem.

6. A pressure reducer reliability testing device according to claim 5, characterized in that: A tightening gear (27) and a loosening gear (28) are fixedly provided on the outer side wall of the rotating sleeve ring (25); an outer ring body (29) meshingly connected to the tightening gear (27) is fixedly connected to the bottom of the test cover plate (14); an inner ring body (30) meshingly connected to the loosening gear (28) is fixedly connected; and a plurality of meshing tooth layers are provided on the outer ring body (29) and the inner ring body (30).

7. A pressure reducer reliability testing device according to claim 1, characterized in that: A trigger (31) for triggering the induction switch (11) is arranged on the inner wall of the induction annular groove (12); the induction switch (11) is arranged at the bottom of the controllable electromagnetic valve and is located inside the induction annular groove (12).

8. A pressure reducer reliability testing device according to claim 1, characterized in that: The rotary control assembly comprises a rotary nut ring rotatably arranged on a support frame (13), an inner side wall of the rotary nut ring being threadedly connected with an adjustment stud (32), and a bottom of the adjustment stud (32) being fixedly connected to a top of a test cover plate (14).

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