A diaphragm valve diaphragm life testing device

Abstract

The application relates to the technical field of diaphragm testing, in particular to a diaphragm valve diaphragm service life testing device which comprises a box body and further comprises a first pipeline, a second pipeline, a water pump, an intermediate pipeline, a first testing part and a control part, wherein: one end of the second pipeline is in communication with the upper end of the first pipeline, and the other end of the second pipeline is in communication with the intermediate pipeline; the water pump is connected in series on the second pipeline; the first testing part comprises a testing pipeline, one end of the testing pipeline is in communication with the intermediate pipeline, the other end of the testing pipeline is located in the interior of the box body, the testing pipeline is provided with an opening, a clamping piece is arranged on the periphery of the opening, the clamping piece is used for mounting a diaphragm, a circular ring is arranged on the periphery of the clamping piece, a water-sensitive sensor is arranged in the circular ring, a driving part is arranged above the testing pipeline, the driving part is drivingly connected with a tension sensor, and a connecting rod is arranged at the bottom of the tension sensor. The diaphragm deformation life and the diaphragm rupture life can be simultaneously detected, and the comprehensiveness of diaphragm detection is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of diaphragm testing, in particular to a diaphragm life testing device for a diaphragm valve. Background Art

[0002] The diaphragm valve is a stop valve that uses a diaphragm as an opening and closing member to close the flow channel, cut off the fluid, and separate the valve body cavity from the valve cover cavity. The diaphragm must be tested for life during the production process.

[0003] Patent application number 202322466941.1 discloses an anti-fatigue detection device for the diaphragm of a diaphragm valve, which includes a test box, a liquid storage barrel, an infusion pump and a pressure maintainer. The test box includes an upper box body and a lower box body clamped on both sides of the diaphragm. A solution cavity connected to the liquid storage barrel is formed between the diaphragm and the lower box body, and a breathing cavity is formed between the diaphragm and the upper box body; the piston of the pressure maintainer divides the cylinder body into a pressure cavity and a power cavity, the pressure cavity is connected to the solution cavity through an infusion tube, and a spring is installed in the power cavity; the inlet and outlet of the infusion pump are connected to the liquid storage barrel and the infusion tube respectively; a guide rod and a motor are installed on the upper box body, the lower end of the guide rod extends into the breathing cavity, a flat groove cam is installed on the output shaft of the motor, and a shift rod inserted into the cam groove of the flat groove cam is installed on the guide rod.

[0004] The inventors have discovered that the above device has some deficiencies. For example, the above device can only detect the rupture of the diaphragm but cannot detect the deformation of the diaphragm. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a diaphragm life testing device for a diaphragm valve, so as to solve the problem that the current device can only detect the rupture of the diaphragm but cannot detect the deformation of the diaphragm.

[0006] Based on the above purpose, the present invention provides a diaphragm life test device for a diaphragm valve, comprising a housing, a first pipe, a second pipe, a water pump, an intermediate pipe, a first test unit, and a control unit, wherein:

[0007] The first pipe is vertically arranged on one side of the interior of the box, one end of the second pipe is connected to the upper end of the first pipe, and the other end of the second pipe is connected to the middle pipe;

[0008] The water pump is connected in series to the second pipeline;

[0009] The first testing part includes a testing pipe, one end of which is connected to the intermediate pipe, and the other end of which is located inside the box. The testing pipe has an opening, and a clamping piece is provided on the periphery of the opening. The clamping piece is used to install a diaphragm. A circular ring is provided on the periphery of the clamping piece, and a water sensor is provided inside the circular ring. A driving part is provided above the testing pipe, and the driving part is transmission-connected to the tension sensor. A connecting rod is provided at the bottom of the tension sensor, and the lower end of the connecting rod is used to cooperate with the diaphragm.

[0010] The water pump works to pump the water in the box into the first pipe, and then passes through the second pipe, the middle pipe and the test pipe. The control unit is electrically connected to the drive unit. The drive unit drives the middle part of the diaphragm to rise or fall through the tension sensor and the connecting rod to achieve connection and disconnection at the opening. The drive unit drives the tension sensor to rise to the same height each time. When it rises to the highest position, the tension sensor detects that the tension is less than the predetermined value. The control unit outputs the first number of times the drive unit drives the tension sensor to rise and fall. When the water sensitive sensor detects the presence of liquid, the control unit outputs the second number of times the drive unit drives the tension sensor to rise and fall.

[0011] Optionally, the testing device further includes a pressure regulating unit, which is provided on the testing pipe and is used to regulate the pressure of water in the testing pipe.

[0012] Optionally, the pressure regulating unit includes a pressure sensor arranged in the test pipe and an automatic regulating pressure relief valve arranged on the test pipe and connected to the test pipe. The pressure sensor and the automatic regulating pressure relief valve are both electrically connected to the control unit. By setting the numerical range of the pressure sensor, the control unit controls the pressure relief size of the automatic regulating pressure relief valve based on real-time data detected by the pressure sensor, so that the water pressure is maintained within the numerical range set by the pressure sensor.

[0013] Optionally, the testing device further includes a heating unit, which is disposed in the box and is used to heat water.

[0014] Optionally, the heating part includes a heating wire arranged in the box and a temperature sensor arranged in the box, and the heating wire and the temperature sensor are both electrically connected to the control part. By setting the numerical range of the temperature sensor, the control part controls the heating wire to work or stop based on the real-time temperature of the temperature sensor, so that the water temperature is maintained within the numerical range set by the temperature sensor.

[0015] Optionally, the first test parts are provided in multiple groups, and the multiple groups of the first test parts are arranged side by side on the middle pipe.

[0016] Optionally, the first test unit is provided with two groups. When the water pump is working, the control unit controls one group of driving units to move the middle part of the diaphragm up or down, and the control unit controls the other group of driving units to make the diaphragm in a closed state, simulating the diaphragm in a closed state being impacted by different pressures. When the predetermined time is reached, the control unit controls the working states of the two groups of driving units to be reversed.

[0017] The water pump pumps water into the middle pipe, and then flows into the two test pipes through the middle pipe. When the control unit controls one set of drive units to mobilize the middle part of the diaphragm to rise or fall, the control unit controls the other set of drive units to make the diaphragm in a closed state. When one set of drive units mobilizes the middle part of the diaphragm to rise or fall, the water flow in the test pipe will change. Since the two test pipes are connected through the middle pipe, the water pressure in the closed test pipe where the diaphragm is in will change. Therefore, it can simulate the diaphragm in a closed state being impacted by different pressures. When the predetermined time is reached, the control unit controls the working state of the two sets of drive units to be reversed. In this way, the service life of the diaphragm after the impact of different pressures for a predetermined time period can be simulated, further improving the comprehensiveness of the test.

[0018] Optionally, the driving unit includes an electric cylinder, which is vertically arranged above the test pipe, and the upper end of the tension sensor is arranged on a telescopic rod of the electric cylinder.

[0019] When using this test device for testing, the diaphragm is installed at the opening with the clamping piece, and an appropriate amount of water is placed in the box. When working, the water pump works to pump the water in the box into the first pipe. The water then passes through the second pipe, the middle pipe and the test pipe, and flows back to the box from the test pipe. The control unit controls the operation of the driving unit, and the driving unit drives the middle part of the diaphragm to rise or fall through the tension sensor and the connecting rod to achieve connection and disconnection at the opening, thereby simulating the switch of the diaphragm valve and testing the service life of the diaphragm. The driving unit drives the tension sensor to rise to the same height each time. When it rises to the highest position, the diaphragm Under normal circumstances, a pulling force will be applied to the tension sensor. When the tension sensor detects that the pulling force is less than the predetermined value, it means that the deformation of the diaphragm exceeds the predetermined value, and the diaphragm no longer applies sufficient pulling force to the tension sensor. The control unit outputs the first number of times the driving unit drives the tension sensor to rise and fall. The first number is the number of switches when the deformation of the diaphragm exceeds the predetermined value. When the water-sensitive sensor detects liquid, it means that the diaphragm has ruptured and water has flowed out. The control unit outputs the second number of times the driving unit drives the tension sensor to rise and fall. The second number is the number of switches when the diaphragm ruptures.

[0020] From the above, it can be seen that the present testing device can simultaneously detect the deformation life and rupture life of the diaphragm, thereby improving the comprehensiveness of diaphragm testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 Schematic diagram of the structure of the test device according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0024] Figure 3 This is a layout diagram of the pressure regulating unit and the heating unit according to an embodiment of the present invention;

[0025] Figure 4 This is a top view of two test pipes arranged side by side according to an embodiment of the present invention.

[0026] The numbers in the figure are:

[0027] 1. Box body; 2. First pipe; 3. Second pipe; 4. Water pump; 5. Intermediate pipe; 6. Test pipe; 7. Connector; 8. Diaphragm; 9. Ring; 10. Water sensor; 11. Tension sensor; 12. Connecting rod; 13. Automatic pressure relief valve; 14. Heating wire; 15. Temperature sensor; 16. Electric cylinder. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] like Figure 1-Figure 2 As shown, a diaphragm life test device for a diaphragm valve includes a box body 1, a first pipe 2, a second pipe 3, a water pump 4, an intermediate pipe 5, a first test unit and a control unit, wherein:

[0031] The first pipe 2 is vertically arranged on one side of the box body 1, one end of the second pipe 3 is connected to the upper end of the first pipe 2, and the other end of the second pipe 3 is connected to the middle pipe 5;

[0032] The water pump 4 is connected in series to the second pipe 3;

[0033] The first testing part includes a testing pipe 6, one end of which is connected to the intermediate pipe 5, and the other end of which is located inside the box 1. The testing pipe 6 has an opening, and a clamping member 7 is provided on the periphery of the opening. The clamping member 7 is used to install a diaphragm 8. A ring 9 is provided on the periphery of the clamping member 7, and a water sensor 10 is provided inside the ring 9. A driving unit is provided above the testing pipe 6, and the driving unit is transmission-connected to a tension sensor 11. A connecting rod 12 is provided at the bottom of the tension sensor 11, and the lower end of the connecting rod 12 is used to cooperate with the diaphragm 8;

[0034] The water pump 4 works to pump the water in the box 1 into the first pipe 2, and then passes through the second pipe 3, the intermediate pipe 5 and the test pipe 6. The control unit is electrically connected to the drive unit. The drive unit drives the middle part of the diaphragm 8 to rise or fall through the tension sensor 11 and the connecting rod 12 to achieve connection and disconnection at the opening. The drive unit drives the tension sensor 11 to rise to the same height each time. When it rises to the highest position, the tension sensor 11 detects that the tension is less than the predetermined value. The control unit outputs the first number of times the drive unit drives the tension sensor 11 to rise and fall. When the water sensor 10 detects the presence of liquid, the control unit outputs the second number of times the drive unit drives the tension sensor 11 to rise and fall.

[0035] When using this test device for testing, the diaphragm 8 is installed at the opening by the clamping piece 7, and a proper amount of water or other liquid is placed in the box body 1. When working, the water pump 4 works to pump the water in the box body 1 into the first pipe 2, and the water then passes through the second pipe 3, the intermediate pipe 5 and the test pipe 6, and flows back to the box body 1 from the test pipe 6. The control unit controls the operation of the driving unit, and the driving unit drives the middle part of the diaphragm 8 to rise or fall through the tension sensor 11 and the connecting rod 12 to achieve connection and disconnection at the opening, thereby simulating the switch of the diaphragm 8 valve and testing the service life of the diaphragm 8. The driving unit drives the tension sensor 11 to rise to the same height each time. When it rises to the highest position, the tension sensor 11 rises ... When the diaphragm 8 is set, the diaphragm 8 will normally apply a pulling force to the tension sensor 11. When the tension sensor 11 detects that the pulling force is less than the predetermined value, it means that the diaphragm 8 has exceeded the predetermined deformation. The diaphragm 8 no longer applies sufficient pulling force to the tension sensor 11. The control unit outputs the first number of times the driving unit drives the tension sensor 11 to rise and fall. The first number is the number of switches when the deformation of the diaphragm 8 exceeds the predetermined value. When the water-sensitive sensor 10 detects liquid, it means that the diaphragm 8 has ruptured and water has flowed out. The control unit outputs the second number of times the driving unit drives the tension sensor 11 to rise and fall. The second number is the number of switches when the diaphragm 8 ruptures.

[0036] As can be seen from the above, the present testing device can simultaneously test the deformation life and rupture life of the diaphragm 8 , thereby improving the comprehensiveness of the testing of the diaphragm 8 .

[0037] like Figure 3 As shown, in some embodiments, the testing device further includes a pressure regulator, which is provided on the testing pipe 6 and is used to adjust the pressure of the water in the testing pipe 6. The lifespan of the diaphragm 8 varies under different pressures. To further enhance the comprehensiveness of the test, a pressure regulator is further provided in this embodiment.

[0038] Optionally, the pressure regulating unit includes a pressure sensor arranged in the test pipe 6 and an automatic regulating pressure relief valve 13 arranged on the test pipe 6 and connected to the test pipe 6. The pressure sensor and the automatic regulating pressure relief valve 13 are both electrically connected to the control unit. By setting the numerical range of the pressure sensor, the control unit controls the pressure relief size of the automatic regulating pressure relief valve 13 based on the real-time data detected by the pressure sensor, so that the water pressure is maintained within the numerical range set by the pressure sensor.

[0039] During operation, by setting the numerical range of the pressure sensor, the pressure sensor detects the real-time data of the water pressure in the pipeline. When the real-time data exceeds the numerical range, it means that the water pressure exceeds the set maximum value. At this time, the control unit controls the valve of the automatic regulating pressure relief valve 13 to increase, thereby increasing the pressure relief capacity and reducing the water pressure. When the real-time data is less than the numerical range, it means that the water pressure is less than the set minimum value. At this time, the control unit controls the valve of the automatic regulating pressure relief valve 13 to decrease, thereby reducing the pressure relief capacity and increasing the water pressure. In this way, the water pressure is maintained within the numerical range set by the pressure sensor, thereby realizing the test of the service life of the diaphragm 8 under a specific water pressure.

[0040] In some embodiments, the testing device further includes a heating unit disposed within the housing 1 for heating the water. The temperature of the medium also affects the lifespan of the diaphragm 8. To test the lifespan of the diaphragm 8 at different temperatures, the present invention further includes a heating unit.

[0041] like Figure 3 As shown, optionally, the heating part includes a heating wire 14 arranged in the box body 1 and a temperature sensor 15 arranged in the box body 1, and the heating wire 14 and the temperature sensor 15 are both electrically connected to the control part. By setting the numerical range of the temperature sensor 15, the control part controls the heating wire 14 to work or stop based on the real-time temperature of the temperature sensor 15, so that the water temperature is maintained within the numerical range set by the temperature sensor 15.

[0042] During operation, by setting the numerical range of the temperature sensor 15, the temperature sensor 15 detects the real-time data of the water temperature in the box 1. When the real-time data exceeds the numerical range, it means that the water temperature exceeds the set maximum value. At this time, the control unit controls the heating wire 14 to stop working, thereby realizing automatic cooling. When the real-time data is less than the numerical range, it means that the water temperature is less than the set minimum value. At this time, the control unit controls the heating wire 14 to start working, thereby heating the water and increasing the water temperature. In this way, the water temperature is maintained within the numerical range set by the temperature sensor 15, thereby realizing the test of the service life of the diaphragm 8 at a specific temperature of the medium.

[0043] In some embodiments, the first test parts are provided in multiple groups, and the multiple groups of the first test parts are arranged side by side on the intermediate pipe 5. The design of multiple groups of the first test parts can test multiple diaphragms 8 at the same time, thereby improving the efficiency of the test.

[0044] like Figure 1 、 Figure 2 and Figure 4 As shown, in some embodiments, the first test part is provided with two groups. When the water pump 4 is working, the control part controls one group of driving parts to mobilize the middle part of the diaphragm 8 to rise or fall, and the control part controls the other group of driving parts to make the diaphragm 8 in a closed state, simulating the diaphragm 8 in a closed state being impacted by different pressures. When the predetermined time is reached, the control part controls the working states of the two groups of driving parts to be reversed.

[0045] In this embodiment, the water pump 4 works to pump water into the intermediate pipe 5, and then the water flows into the two test pipes 6 through the intermediate pipe 5. When the control unit controls one group of driving units to mobilize the middle part of the diaphragm 8 to rise or fall, the control unit controls the other group of driving units to make the diaphragm 8 in a closed state. When one group of driving units mobilizes the middle part of the diaphragm 8 to rise or fall, the water flow in the test pipe 6 will change. Since the two test pipes 6 are connected through the intermediate pipe 5, the water pressure in the closed test pipe 6 where the diaphragm 8 is in will change. Therefore, it is possible to simulate the diaphragm 8 in a closed state being impacted by different pressures. When the predetermined time is reached, the control unit controls the working state of the two groups of driving units to be reversed. In this way, the service life of the diaphragm 8 after the impact of different pressures for a predetermined time period can be simulated, thereby further improving the comprehensiveness of the test.

[0046] In some embodiments, the driving unit includes an electric cylinder 16, which is vertically disposed above the test pipe 6. The upper end of the tension sensor 11 is disposed on the telescopic rod of the electric cylinder 16. The control unit controls the extension or contraction of the electric cylinder 16 to drive the middle portion of the diaphragm 8 to rise or fall.

[0047] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the above aspects of the present invention, which are not provided in detail for the sake of simplicity.

[0048] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A diaphragm life test device for a diaphragm valve, comprising a housing (1), characterized in that: Also includes: A first pipeline (2), a second pipeline (3), a water pump (4), an intermediate pipeline (5), a first testing unit and a control unit, wherein: The first pipe (2) is vertically arranged on one side of the interior of the box (1); one end of the second pipe (3) is communicated with the upper end of the first pipe (2); and the other end of the second pipe (3) is communicated with the intermediate pipe (5); The water pump (4) is connected in series to the second pipe (3); The first test part comprises a test pipe (6), one end of the test pipe (6) is connected to the intermediate pipe (5), the other end of the test pipe (6) is located inside the box (1), the test pipe (6) has an opening, a clamping member (7) is provided on the periphery of the opening, the clamping member (7) is used to install the diaphragm (8), a ring (9) is provided on the periphery of the clamping member (7), a water sensor (10) is provided in the ring (9), a driving part is provided above the test pipe (6), the driving part is connected to the tension sensor (11), a connecting rod (12) is provided at the bottom of the tension sensor (11), and the lower end of the connecting rod (12) is used to cooperate with the diaphragm (8); The water pump (4) works to pump the water in the box (1) into the first pipe (2), and then passes through the second pipe (3), the intermediate pipe (5) and the test pipe (6). The control unit is electrically connected to the drive unit. The drive unit drives the middle part of the diaphragm (8) to rise or fall through the tension sensor (11) and the connecting rod (12), so as to achieve connection and disconnection at the opening. The drive unit drives the tension sensor (11) to rise to the same height each time. When it rises to the highest position, the tension sensor (11) detects that the tension is less than a predetermined value, and the control unit outputs the first number of times the drive unit drives the tension sensor (11) to rise and fall. When the water sensor (10) detects the presence of liquid, the control unit outputs the second number of times the drive unit drives the tension sensor (11) to rise and fall.

2. A diaphragm valve diaphragm life testing device according to claim 1, characterized in that: The testing device further comprises a pressure regulating portion, which is arranged on the testing pipe (6) and is used to regulate the pressure of water in the testing pipe (6).

3. A diaphragm valve diaphragm life testing device according to claim 2, characterized in that: The pressure regulating unit comprises a pressure sensor arranged in the test pipe (6) and an automatic regulating pressure relief valve (13) arranged on the test pipe (6) and connected to the test pipe (6); the pressure sensor and the automatic regulating pressure relief valve (13) are both electrically connected to the control unit; by setting the numerical range of the pressure sensor, the control unit controls the pressure relief size of the automatic regulating pressure relief valve (13) based on real-time data detected by the pressure sensor, so that the water pressure is maintained within the numerical range set by the pressure sensor.

4. The diaphragm life testing device for a diaphragm valve according to claim 1, characterized in that: The testing device further comprises a heating portion, which is arranged in the box (1) and is used to heat water.

5. The diaphragm life testing device for a diaphragm valve according to claim 4, characterized in that: The heating part comprises a heating wire (14) arranged in the box (1) and a temperature sensor (15) arranged in the box (1); the heating wire (14) and the temperature sensor (15) are both electrically connected to the control part; by setting the numerical range of the temperature sensor (15), the control part controls the heating wire (14) to work or stop based on the real-time temperature of the temperature sensor (15), so that the water temperature is maintained within the numerical range set by the temperature sensor (15).

6. The diaphragm life testing device for a diaphragm valve according to claim 1, characterized in that: The first test parts are provided in multiple groups, and the multiple groups of the first test parts are arranged side by side on the intermediate pipe (5).

7. A diaphragm valve diaphragm life testing device according to claim 6, characterized in that: The first test unit is provided with two groups. When the water pump (4) is working, the control unit controls one group of driving units to move the middle part of the diaphragm (8) up or down, and the control unit controls the other group of driving units to keep the diaphragm (8) in a closed state, simulating the diaphragm (8) in the closed state being impacted by different pressures. When a predetermined time is reached, the control unit controls the working states of the two groups of driving units to be reversed.

8. The diaphragm life testing device for a diaphragm valve according to claim 1, characterized in that: The driving part comprises an electric cylinder (16), the electric cylinder (16) is vertically arranged above the test pipe (6), and the upper end of the tension sensor (11) is arranged on the telescopic rod of the electric cylinder (16).

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