Diaphragm valve diaphragm life testing device

Abstract

The invention relates to the technical field of diaphragm testing, in particular to a diaphragm valve diaphragm life testing device which comprises a box body and further comprises a first pipeline, a second pipeline, a water pump, a middle pipeline, a first testing part and a control part, one end of the second pipeline is communicated with the upper end of the first pipeline, and the other end of the second pipeline is communicated with the middle pipeline; the water pump is connected to the second pipeline in series. The first testing part comprises a testing pipeline, one end of the testing pipeline is communicated with the middle pipeline, the other end of the testing pipeline is located in the box body, an opening is formed in the testing pipeline, a clamping piece is arranged on the periphery of the opening and used for installing a diaphragm, a circular ring is arranged on the periphery of the clamping piece, and a water-sensitive sensor is arranged in the circular ring; a driving part is arranged above the test pipeline, the driving part is in transmission connection with a tension sensor, and a connecting rod is arranged at the bottom of the tension sensor. According to the invention, the deformation life and the rupture life of the diaphragm can be detected at the same time, and the comprehensiveness of diaphragm detection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm testing, and 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 component 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] The patent with 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 lever inserted into the cam groove of the flat groove cam is installed on the guide rod.

[0004] The inventors have found that the above device has some shortcomings. 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 test 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 box body, a first pipeline, a second pipeline, a water pump, an intermediate pipeline, a first test unit and a control unit, wherein: The first pipe is vertically arranged at one side of the box body, 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; The water pump is connected in series to the second pipeline; The first test part includes a test pipe, one end of which is connected to the middle pipe, and the other end of which is located inside the box. The test pipe has an opening, and a clamp is provided around the opening. The clamp is used to install a diaphragm, and a ring is provided around the clamp, and a water-sensitive sensor is provided inside the ring. A driving part is provided above the test pipe, and the driving part is connected to a tension sensor in a transmission manner. 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. 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 driving unit. 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. The driving 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 a predetermined value. The control unit outputs the first number of times the driving 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 driving unit drives the tension sensor to rise and fall.

[0007] Optionally, the testing device further includes a pressure regulating unit, which is disposed on the testing pipe and is used to regulate the pressure of water in the testing pipe.

[0008] 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.

[0009] Optionally, the testing device further includes a heating unit, which is disposed in the box and is used to heat water.

[0010] Optionally, the heating unit includes a heating wire arranged in the box body and a temperature sensor arranged in the box body, and the heating wire and the temperature sensor are both electrically connected to the control unit. By setting the numerical range of the temperature sensor, the control unit 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.

[0011] 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.

[0012] 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 mobilize the middle part of the diaphragm to rise or fall, 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. After a predetermined time, the control unit controls the working states of the two groups of driving units to be reversed.

[0013] The water pump pumps water into the middle pipe, and then the water flows into the two test pipes through the middle pipe. When the control unit controls one group of drive units to mobilize the middle part of the diaphragm to rise or fall, the control unit controls the other group of drive units to make the diaphragm in a closed state. When one group 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 a closed state will change. Therefore, it is possible to simulate 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 drive units to be reversed. In this way, the service life of the diaphragm after the impact of different pressures for a predetermined period of time can be simulated, further improving the comprehensiveness of the test.

[0014] 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.

[0015] When using this test device for testing, the diaphragm is installed at the opening with the clamping piece, and a proper 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, and 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 a predetermined value, it means that the diaphragm has exceeded a predetermined deformation amount, and the diaphragm no longer applies sufficient tension 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 diaphragm deformation 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.

[0016] From the above, it can be seen that the testing device can simultaneously detect the deformation life and rupture life of the diaphragm, thereby improving the comprehensiveness of the diaphragm detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a testing device according to an embodiment of the present invention; Figure 2 for Figure 1 The enlarged view of point A in the middle; Figure 3 This is a layout diagram of a pressure regulating unit and a heating unit according to an embodiment of the present invention; Figure 4 This is a top view of two test pipes arranged side by side according to an embodiment of the present invention.

[0019] The numbers in the figure are: 1. Box body; 2. First pipeline; 3. Second pipeline; 4. Water pump; 5. Intermediate pipeline; 6. Test pipeline; 7. Connector; 8. Diaphragm; 9. Ring; 10. Water sensitive sensor; 11. Tension sensor; 12. Connecting rod; 13. Automatic pressure relief valve; 14. Heating wire; 15. Temperature sensor; 16. Electric cylinder. DETAILED DESCRIPTION

[0020] 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 in conjunction with specific embodiments.

[0021] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be 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 described object changes, the relative positional relationship may also change accordingly.

[0022] like Figure 1-Figure 2As shown, a diaphragm life test device for a diaphragm valve includes a box body 1, a first pipeline 2, a second pipeline 3, a water pump 4, an intermediate pipeline 5, a first test unit and a control unit, wherein: The first pipe 2 is vertically arranged at 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; The water pump 4 is connected in series to the second pipeline 3; The first test part includes a test pipe 6, one end of which is connected to the middle pipe 5, and the other end of which is located inside the box 1. The test 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-sensitive sensor 10 is provided inside the ring 9. A driving part is provided above the test pipe 6, and a tension sensor 11 is connected to the driving part in a transmission manner. 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 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. The control unit outputs the first number of times the drive unit drives the tension sensor 11 to rise and fall. When the water sensitive 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.

[0023] When using the 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 liquids are 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, and when it rises to the highest position When the diaphragm 8 is set, under normal circumstances, the diaphragm 8 will apply a pulling force to the tension sensor 11. When the tension sensor 11 detects that the pulling force is less than a 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.

[0024] It can be seen from the above that the testing device can simultaneously detect the deformation life of the diaphragm 8 and the rupture life of the diaphragm 8, thereby improving the comprehensiveness of the detection of the diaphragm 8.

[0025] like Figure 3 As shown, in some embodiments, the test device further includes a pressure regulating unit, which is disposed on the test pipe 6 and is used to regulate the pressure of water in the test pipe 6. The life of the diaphragm 8 is different under different pressures. In order to further improve the comprehensiveness of the detection, a pressure regulating unit is further provided in this embodiment.

[0026] 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 real-time data detected by the pressure sensor, so that the water pressure is maintained within the numerical range set by the pressure sensor.

[0027] 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.

[0028] In some embodiments, the testing device further comprises a heating unit, which is arranged in the box 1 and is used to heat water. The temperature of the medium also affects the life of the diaphragm 8. In order to detect the service life of the diaphragm 8 at different temperatures, the present invention further provides a heating unit.

[0029] like Figure 3 As shown, optionally, the heating unit 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 unit. By setting the numerical range of the temperature sensor 15, the control unit 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.

[0030] 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 raising 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.

[0031] 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 test efficiency.

[0032] like Figure 1 , Figure 2 and Figure 4As shown, in some embodiments, 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 mobilize the middle part of the diaphragm 8 to rise or fall, and the control unit controls the other group of driving units to make the diaphragm 8 in a closed state, simulating the diaphragm 8 in a 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.

[0033] In this embodiment, the water pump 4 works to pump water into the middle pipe 5, and then the water flows into the two test pipes 6 through the middle 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 middle 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 period of time can be simulated, thereby further improving the comprehensiveness of the test.

[0034] In some embodiments, the driving unit includes an electric cylinder 16, which 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. The control unit controls the extension or contraction of the electric cylinder 16 to drive the middle part of the diaphragm 8 to rise or fall.

[0035] 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. Under the concept 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.

[0036] 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 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); The water pump (4) is connected in series to the second pipeline (3); The first testing part comprises 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 piece (7) is provided on the periphery of the opening. The clamping piece (7) is used to install a diaphragm (8). A circular ring (9) is provided on the periphery of the clamping piece (7), and a water-sensitive sensor (10) is provided inside the circular ring (9). A driving part is provided above the testing pipe (6), and the driving part 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); 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 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-sensitive 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 test device according to claim 1, characterized in that: The testing device further comprises a pressure regulating unit, 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 test 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 a 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. A diaphragm valve diaphragm life test device according to claim 1, characterized in that: The testing device further comprises a heating unit, which is arranged in the box (1) and is used to heat water.

5. A diaphragm valve diaphragm life test device according to claim 4, characterized in that: The heating unit 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 unit; by setting a numerical range of the temperature sensor (15), the control unit controls the heating wire (14) to start 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. A diaphragm valve diaphragm life test device 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 test 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 mobilize the middle part of the diaphragm (8) to rise or fall, and the control unit controls the other group of driving units to make the diaphragm (8) in a closed state, simulating the diaphragm (8) in a 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. A diaphragm valve diaphragm life test device 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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