Butterfly valve rotation torque testing device and method

Abstract

The invention discloses a rotating torque testing device and method for a butterfly valve, and is applied to the rotating torque testing of the butterfly valve, and the butterfly valve comprises a valve body, a valve shaft and a valve plate. The first end of the valve shaft extends into the valve body, and the second end of the valve shaft extends out of the valve body and is configured to rotate along the axis of the valve shaft; the valve plate is arranged in the valve body, fixedly connected with the valve shaft and configured to rotate along with the valve shaft; the rotation torque testing device comprises a first vacuum cover, wherein the first vacuum cover and the valve body are enclosed to form a first space; a second space is defined by the second vacuum cover and the valve body; the vacuumizing module is used for vacuumizing the first space and / or the second space, so that a pressure difference is formed between the first space and the second space; and the torque sensing module is configured to be connected with the second end of the valve shaft to test torque values of the butterfly valve under different pressure differences. According to the invention, the torque values of the butterfly valve under different pressure differences can be obtained, and the torque dynamic curve of the butterfly valve can be measured.

Description

Technical Field

[0001] This application relates to the technical field of torque testing, and particularly to a device and method for testing the rotational torque of a butterfly valve. Background Art

[0002] As a regulating valve, a butterfly valve has the characteristics of simple structure, small size, light weight, low material consumption, small installation size, rapid switching, 90° reciprocating rotation, and small driving torque. It is used to cut off, connect, and regulate the medium in the pipeline, and has good fluid control characteristics and closing and sealing performance. The use of butterfly valves is becoming more and more common. With the rapid development of society and industry, it is necessary to continuously improve various performances of butterfly valves to better adapt to the industrial environment and promote the positive development of society and industry.

[0003] In the existing testing of the torque of a butterfly valve, the test can only be carried out when there is no vacuum pressure difference between the valve plates of the butterfly valve or the pressure difference on both sides of the valve plate is fixed. The test results are single and cannot meet the test requirements for the butterfly valve under various working conditions. Summary of the Invention

[0004] In order to solve the deficiencies of the existing technology, the following technical solutions are adopted in this application: In a first aspect, a device for testing the rotational torque of a butterfly valve provided in this application is applied to the testing of the rotational torque of a butterfly valve. The butterfly valve includes: A valve body; A valve shaft, the first end of the valve shaft extends into the interior of the valve body, and the second end of the valve shaft extends out of the valve body and is configured to be rotatable along the axis of the valve shaft; A valve plate, the valve plate is arranged in the valve body, fixedly connected to the valve shaft, and is configured to rotate following the valve shaft; The device for testing the rotational torque includes: A first vacuum cover, configured to be connected to one side of the valve body and enclose a first space with the valve body; a second vacuum cover, configured to be connected to the other side of the valve body and enclose a second space with the valve body; when the valve plate is in a first state, the first space is communicated with the second space, and when the valve plate is in a second state, the first space is isolated from the second space; A vacuum pumping module, the vacuum pumping module is used to pump vacuum on the first space and / or the second space to form a pressure difference between the first space and the second space; A torque sensing module, configured to be connected to the second end of the valve shaft and used to test the torque value of the butterfly valve under different pressure differences.

[0005] In summary, a rotational torque testing device for a butterfly valve provided by the present application independently controls the vacuum degrees of two regions of the butterfly valve through a vacuum pumping module, forms different differential pressure combinations from high vacuum degree to low vacuum degree on both sides of the valve plate, accurately simulates different vacuum differential pressure conditions that the butterfly valve may encounter in actual working conditions, and meets diverse testing requirements. By simulating different differential pressure conditions, the torque values of the butterfly valve under different pressure differences are measured, thereby generating a torque dynamic curve of the butterfly valve, evaluating the torque characteristics of the butterfly valve under different working conditions, and providing data support for testing the quality of the butterfly valve or optimizing the design of the butterfly valve.

[0006] Further, the vacuum pumping module includes a vacuum pump, the vacuum pump is connected to the first space, and the vacuum pump is configured to evacuate the first space and the second space when the valve plate is in the first state, and evacuate the first space when the valve plate is in the second state.

[0007] Further, the rotational torque testing device further includes: A pressure regulating module, the pressure regulating module is configured to adjust the vacuum degrees of the first space and / or the second space by supplying gas to the first space and / or the second space.

[0008] Further, the pressure regulating module includes: An air tank, the air tank is communicated with the first space or the second space through a pipeline; An air intake control unit, which is communicated with the air tank through a pipeline and is configured to control the air intake amount into the first space or the second space.

[0009] Further, the pressure regulating module includes: A first air tank, the first air tank is communicated with the first space through a pipeline; A first air intake control unit, which is communicated with the first air tank through a pipeline and is configured to control the air intake amount into the first space.

[0010] A second air tank, the second air tank is communicated with the second space through a pipeline; A second air intake control unit, which is communicated with the second air tank through a pipeline and is configured to control the air intake amount into the second space; Further, the rotational torque testing device further includes a first vacuum gauge and a second vacuum gauge, the first vacuum gauge is configured to detect the vacuum degree of the first space, and the second vacuum gauge is configured to detect the vacuum degree of the second space.

[0011] Further, the torque sensing module includes a torque sensor, one end of the torque sensor is used for driving connection with the valve shaft, and the other end of the torque sensor is used for connecting with the transmission shaft of the driving motor through a coupling.

[0012] Further, the rotational torque testing device includes a base, The base includes: A load fixing device part, configured to fixedly install the butterfly valve; A torque sensing module fixing part, adjacent to the load fixing device part, configured to fixedly install the torque sensing module; A motor fixing device part, adjacent to the torque sensing module fixing part, configured to fixedly install the driving motor.

[0013] Further, the motor fixing device part includes a moving workbench, and the moving workbench is configured to control the driving motor to move in one or more of the following directions: up and down direction, left and right direction, front and back direction.

[0014] In a second aspect, the present application further provides a method for testing the rotational torque of a butterfly valve. The rotational torque testing method applies the above-mentioned rotational torque testing device, and the rotational torque testing method includes the following steps: Vacuumize the first space and / or the second space to form a pressure difference between the first space and the second space, Test the torque value of the butterfly valve under different pressure differences. Description of the Drawings

[0015] Figure 1 Is a three-dimensional schematic diagram of a rotational torque testing device for a butterfly valve provided by an embodiment of the present application; Figure 2 Is an internal structure schematic diagram of the butterfly valve being tested in a rotational torque testing device for a butterfly valve provided by an embodiment of the present application; Figure 3 Is a three-dimensional schematic diagram of a rotational torque testing device for a butterfly valve provided by an embodiment of the present application including a pressure regulating module; Figure 4 Is a three-dimensional schematic diagram of a rotational torque testing device for a butterfly valve provided by an embodiment of the present application including a plurality of gas cylinders, an intake control unit and a vacuum gauge; Figure 5 Is a three-dimensional schematic diagram of a torque sensing module and a base in a rotational torque testing device for a butterfly valve provided by an embodiment of the present application; Figure 6 Is a flow schematic diagram of generating different pressure differences on both sides of the butterfly valve plate in a rotational torque testing method for a butterfly valve provided by an embodiment of the present application. Specific Embodiments

[0016] The following will describe the present application in detail in conjunction with the specific embodiments shown in the drawings. However, these embodiments do not limit the present application, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present application.

[0017] To solve the deficiencies of the prior art, the present application provides a device and method for testing the rotational torque of a butterfly valve, which is applied to the rotational torque test of a butterfly valve. As Figure 1 shown, the rotational torque test device 100 includes a first vacuum chamber 11, a second vacuum chamber 12, a vacuum pumping module 13, and a torque sensing module 14. As Figure 2 shown, the butterfly valve 200 includes a valve body 21, a valve shaft 22, and a valve plate 23.

[0018] As Figure 3 shown, the first end of the valve shaft 22 of the butterfly valve 200 extends into the interior of the valve body 21, and the first end of the valve shaft 22 is fixedly connected to the valve plate 23; the second end of the valve shaft 22 extends out of the valve body 21 and is movably connected to the rotational torque test device 100. The valve shaft 22 is configured to rotate along the axis of the valve shaft 22, thereby driving the valve plate 23 to rotate. Further, a sealing structure is provided at the connection between the valve shaft 22 and the valve body 21 to prevent gas leakage.

[0019] The first vacuum chamber 11 is configured to be connected to one side of the valve body 21 of the butterfly valve 200, and the first vacuum chamber 11 and the valve body 21 enclose a first space 111; the second vacuum chamber 12 is configured to be connected to the other side of the valve body 21 of the butterfly valve 200, and the second vacuum chamber 12 and the valve body 21 enclose a second space 121, thereby forming an enclosed space on both sides of the valve plate 21 of the butterfly valve 200. And the first vacuum chamber 11 and / or the second vacuum chamber 12 are configured to be connected to the vacuum pumping module 13 to provide a basic condition for forming a pressure difference on both sides of the valve plate 23. When the valve plate 23 is in the first state, the first space 111 is communicated with the second space 121; when the valve plate 23 is in the second state, the first space 111 is isolated from the second space 121. It should be noted that, according to the connection requirements of the vacuum pumping module 13, the first vacuum chamber 11 and / or the second vacuum chamber 12 may be configured with flange interfaces, and the first vacuum chamber 11 and the second vacuum chamber 12 are connected to the vacuum pumping module 13 through pipelines.

[0020] Specifically, the valve shaft 22 drives the valve plate 23 to rotate by a certain angle, and the valve plate 23 disengages from the sealing surface of the inner wall of the valve body 21. At this time, the first space 111 and the second space 121 on both sides of the valve plate 23 communicate with each other, allowing fluid or gas to flow freely between the two spaces. The state of the valve plate 23 at this time is recorded as the first state. When the valve shaft 22 drives the valve plate 23 to rotate to the closed position of the butterfly valve 200, the valve plate 23 contacts the sealing surface of the inner wall of the valve body 21. At this time, the first space 111 and the second space 121 on both sides of the valve plate 23 are isolated, blocking the fluid or gas exchange between the two spaces. The state of the valve plate 23 at this time is recorded as the second state.

[0021] During the test, the butterfly valve 200 is firmly installed on the rotational torque testing device 100 to prevent vibration or displacement from interfering with the test results. The vacuum pumping module 13 of the rotational torque testing device 100 evacuates the first space 111 and / or the second space 121 to create a pressure difference between the first space 111 and the second space 121; the torque sensing module 14 is configured to be connected to the second end of the valve shaft 22 for testing the torque value of the butterfly valve 200 under different pressure differences.

[0022] Specifically, the vacuum pumping module 13 is connected to the butterfly valve 200 through a corrugated hose, and the vacuum pumping module 13 is used to create a controllable vacuum pressure difference environment on both sides of the valve plate 23 of the butterfly valve 200. Optionally, the vacuum pumping module 13 is connected to the first space 111. When the valve plate 23 of the butterfly valve 200 is opened, the vacuum pumping module 13 evacuates both the first space 111 and the second space 121 simultaneously; when the valve plate 23 of the butterfly valve 200 is closed, the vacuum pumping module 13 continues to evacuate the first space 111 alone, creating a pressure difference between the first space 111 and the second space 121. Alternatively, the vacuum pumping module 13 is connected to the second space 121. When the valve plate 23 of the butterfly valve 200 is opened, the vacuum pumping module 13 evacuates both the first space 111 and the second space 121 simultaneously; when the valve plate 23 of the butterfly valve 200 is closed, the vacuum pumping module 13 continues to evacuate the second space 121 alone, creating a pressure difference between the first space 111 and the second space 121. Further, the rotational torque testing device 100 provided in the present application includes a plurality of vacuum pumping modules 13, and the first space 111 and the second space 121 are respectively connected to a vacuum pumping module 13 to evacuate the first space 111 and the second space 121 respectively, so as to accurately control the pressure difference between the first space 111 and the second space 121.

[0023] The torque sensing module 14 is drivingly connected to the valve shaft 22 of the butterfly valve 200, and the torque sensing module 14 can dynamically measure the torque value of the butterfly valve 200. During the test, the resistance received by the valve plate 23 under different vacuum pressure differences is different, and the rotational resistance of the valve shaft 22 will change with the change of the pressure difference on both sides of the valve plate 23. The torque sensor 141 records the change of the rotational torque of the valve shaft 22, obtains the mechanical torque value of the butterfly valve 200 under different pressure differences, and generates a dynamic torque curve.

[0024] According to the above description, a rotational torque test device for a butterfly valve provided by the present application independently controls the vacuum degrees of the areas on both sides of the butterfly valve 200 through the vacuum pumping module 13, forms different pressure difference combinations from high vacuum degree to low vacuum degree on both sides of the valve plate 23, accurately simulates different vacuum pressure difference conditions that the butterfly valve 200 may encounter in actual working conditions, and meets diverse test requirements. By simulating different pressure difference conditions, the torque values of the butterfly valve 200 under different pressure differences are measured, thereby generating a dynamic torque curve of the butterfly valve 200, evaluating the torque characteristics of the butterfly valve 200 under different working conditions, and providing data support for testing the quality of the butterfly valve 200 or optimizing the design of the butterfly valve 200.

[0025] As an optional implementation manner, the vacuum pumping module 13 includes a vacuum pump. The vacuum pump is connected to the first space 111 and is configured to evacuate the first space 111 and the second space 121 when the valve plate 23 is in the first state, and evacuate the first space 111 when the valve plate 23 is in the second state.

[0026] Specifically, when the valve plate 23 is in the first state, the first space 111 is communicated with the second space 121, and the vacuum pump is connected to the first space 111 through a corrugated pipe. By utilizing the through - connection of the first space 111 and the second space 121 in the first state, the vacuum pump evacuates the first space 111 and the second space 121 simultaneously to quickly establish an initial vacuum environment inside the butterfly valve 200.

[0027] When the valve plate 23 is in the second state, the first space 111 is isolated from the second space 121, and the vacuum pump remains connected to the first space 111. At this time, the vacuum pump only performs an independent evacuation operation on the first space 111. Since there is no gas exchange path between the second space 121 and the first space 111, as the vacuum pump continuously evacuates the first space 111, the pressure exerted on the valve plate 23 by the first space 111 gradually decreases, while the pressure exerted on the valve plate 23 by the second space 121 remains unchanged. Thus, a vacuum pressure difference is formed on both sides of the valve plate 23. By adjusting the amount of air extraction of the vacuum pump for the first space 111, different pressure differences can be formed on both sides of the valve plate 23. Different pressure differences cause different forces to act on the valve plate 23, thereby generating different torques. The corresponding torque values are measured by the torque sensing module 14, providing important data for evaluating the performance of the butterfly valve 200.

[0028] Optionally, a vacuum pump may be connected to the second space 121. When the valve plate 23 of the butterfly valve 200 is in the first state, the vacuum pump evacuates the first space 111 and the second space 121. When the valve plate 23 of the butterfly valve 200 is in the second state, the vacuum pump evacuates the second space 121. Further, the evacuation module 13 may further include a plurality of vacuum pumps. The first space 111 and the second space 121 are respectively connected to a vacuum pump. When the valve plate 23 is in the second state, the first space 111 and the second space 121 are evacuated respectively to precisely control the pressure difference between the first space 111 and the second space 121.

[0029] As an optional implementation, as Figure 3 shown, the rotational torque testing device 100 further includes a pressure regulating module 15. The pressure regulating module 15 is configured to adjust the vacuum degree of the first space 111 and / or the second space 121 by ventilating the first space 111 and / or the second space 121.

[0030] Exemplarily, the pressure regulating module 15 is configured to ventilate the first space 111. When the valve plate 23 is in the first state, the evacuation module 13 evacuates the first space 111 and the second space 121 to a certain vacuum degree. The valve plate 23 is adjusted to the second state to isolate the first space 111 and the second space 121. The pressure regulating module 15 ventilates the first space 111 to reduce the vacuum degree of the first space 111, thereby forming a vacuum pressure difference on both sides of the valve plate 23. Optionally, the pressure regulating module 15 ventilates the second space 121 to change the vacuum degree of the second space 121 to adjust the pressure difference on both sides of the valve plate 23, thereby precisely controlling the pressure difference between the spaces on both sides of the valve plate 23. Further, the pressure regulating module 15 may also be configured to independently ventilate the first space 111 and the second space 121 respectively to precisely adjust the vacuum degrees of the first space 111 and the second space 121 and obtain a more accurate pressure difference.

[0031] By ventilating the first space 111 and / or the second space 121, the pressure regulating module 15 can flexibly adjust the vacuum degrees of the spaces on both sides of the valve plate 23 by precisely controlling the ventilation volume entering the butterfly valve 200, realize the dynamic adjustment of the pressure difference on both sides of the valve plate 23, simulate various pressure difference situations that the butterfly valve 200 may encounter under different working conditions, and cooperate with the torque sensing module 14 to realize the measurement of the torque value of the butterfly valve 200 under different vacuum degrees and pressure differences. Moreover, the pressure regulating module 15 adjusts the pressure values of the spaces on both sides of the valve plate 23 through controllable air replenishment operations, effectively avoiding pressure fluctuations caused by over-evacuation and improving the stability of the test environment.

[0032] As an alternative implementation, the pressure regulating module 15 includes a gas tank 151 and an intake control unit 152. The gas tank 151 is connected to the first space 111 or the second space 121 through a pipeline; the intake control unit 152 is connected to the gas tank 151 through a pipeline, and the intake control unit 152 is configured to control the intake air volume into the first space 111 or the second space 121.

[0033] Specifically, the gas tank 151 is connected to the first space 111 or the second space 121 through a pipeline. The gas tank 151 is used to maintain the pressure of the vacuum environment inside the butterfly valve 200 and prevent the vacuum degree inside the butterfly valve 200 from changing suddenly in a short time; the intake control unit 152 is connected to the gas tank 151 through a pipeline. The intake control unit 152 is used to accurately adjust the gas flow rate entering the first space 111 or the second space 121. The intake control unit 152 can dynamically control the gas volume injected from the external environment into the first space 111 or the second space 121 to achieve precise regulation of the vacuum degree of the first space 111 or the second space 121. Optionally, the intake control unit 152 can be a device such as a flow meter or a proportional valve to accurately control the gas flow rate entering the first space 111 or the second space 121. Further, the butterfly valve 200 is also connected to the external environment through a pipeline, and a pipeline valve 133 is provided on the pipeline. The pipeline valve 133 is used to control the on-off between the first space 111 or the second space 121 and the external environment. After the butterfly valve 200 completes the test, the pipeline valve 133 can be opened to quickly balance the internal and external air pressures of the butterfly valve 200. Optionally, the pipeline valve 133 can be set as a ball valve.

[0034] Exemplarily, the vacuum pumping module 13 is connected to the first space 111, and the gas tank 151 and the intake control unit 152 are connected to the second space 121 through pipelines. After the vacuum pumping module 13 pumps the first space 111 to the target vacuum degree, the butterfly valve 200 is closed, and the intake control unit 152 is opened to inject gas into the second space 121 to change the vacuum degree of the second space 121, so as to form a pressure difference on both sides of the valve plate 23. For example, when simulating the pressure difference test in the closed state of the butterfly valve 200, the second space 121 is slowly filled with gas to gradually increase its pressure value, while the first space 111 maintains a low vacuum state to achieve the regulation of the pressure difference on both sides of the valve plate 23 of the butterfly valve 200. Through the collaborative work of the gas tank 151 and the intake control unit 152, the pressure regulating module 15 can flexibly and accurately adjust the vacuum degree on both sides of the valve plate 23 of the butterfly valve 200, providing a highly controllable pressure difference environment for the torque test of the butterfly valve 200.

[0035] As an alternative implementation, such as Figure 4As shown in the figure, the pressure regulating module 15 includes a first gas tank 1511, a second gas tank 1512, a first air intake control unit 1521 and a second air intake control unit 1522. The first gas tank 1511 is connected to the first space 111 through a pipeline, and the first air intake control unit 1521 is connected to the first gas tank 1511 through a pipeline. The first gas tank 1511 is used to maintain the pressure of the first space 111, and the first air intake control unit 1521 is configured to control the air intake volume injected into the first space 111, and adjust the vacuum degree of the first space 111 by gas injection.

[0036] The second gas tank 1512 is connected to the second space 121 through a pipeline, and the second air intake control unit 1522 is connected to the second gas tank 1512 through a pipeline. The second gas tank 1512 is used to maintain the pressure of the second space 121, and the second air intake control unit 1522 is configured to control the air intake volume injected into the second space 121, and adjust the vacuum degree of the second space 121 by gas injection.

[0037] According to the above description, the vacuum pumping module 13 evacuates the first space 111 and / or the second space 121, and cooperates with the pressure regulating module 15 to supplement air to the first space 111 and the second space 121, so as to regulate the pressure difference on both sides of the valve plate 23. For the convenience of description, the vacuum degrees of the first space 111 and the second space 121 when the valve plate 23 is in the first state are denoted as V, the target vacuum degree of the first space 111 is denoted as V1, and the target vacuum degree of the second space 121 is denoted as V2.

[0038] Exemplarily, the vacuum pumping module 13 is connected to the first space 111. During the test, when the valve plate 23 of the butterfly valve 200 is in the first state, the vacuum pumping module 13 evacuates the first space 111 and the second space 121. When the vacuum degree V of the first space 111 and the second space 121 is greater than the target vacuum degree V2, the butterfly valve 200 and the vacuum pump are closed to stabilize the pressure on both sides of the valve plate 23 of the butterfly valve 200. At this time, the second air intake control unit 1522 is opened to inject gas into the second space 121. When the vacuum degree of the second space 121 reaches the target vacuum degree V2, the second air intake control unit 1522 is closed to stop gas transmission to the second space 121.

[0039] If the vacuum degree of the first space 111 is greater than the target vacuum degree V1 at this time, the first intake air control unit 1521 is opened to inject gas into the first space 111, so that the vacuum degree of the first space 111 is reduced to the target vacuum degree V1. If the vacuum degree of the first space 111 is less than the target vacuum degree V1 at this time, the vacuum pumping module 13 pumps the first space 111 again until the vacuum degree of the first space 111 is greater than the target vacuum degree V1, then stops pumping the first space 111, and at this time controls the first intake air control unit 1521 to be opened to inject gas into the first space 111, so that the vacuum degree of the first space 111 is reduced to the target vacuum degree V1. Thus, the vacuum degrees on both sides of the valve plate 23 are accurately regulated, and the pressure difference on both sides of the valve plate 23 under different working conditions of the butterfly valve 200 is accurately simulated.

[0040] Through the independent design of the two sets of gas storage tanks 151 and the intake air control unit 152, the test device 100 can flexibly meet diverse test requirements, such as simultaneously adjusting the pressures of the two side spaces or simulating different pressure difference conditions in stages, providing comprehensive data support for the performance evaluation of the butterfly valve 200.

[0041] As an alternative implementation, as Figure 4 shown, the rotational torque test device 100 further includes a first vacuum gauge 16 and a second vacuum gauge 17. The first vacuum gauge 16 is installed on a pipeline communicated with the first space 111. The first vacuum gauge 16 is configured to detect the vacuum degree of the first space 111. The first vacuum gauge 16 can accurately display the real-time value of the vacuum degree of the first space 111, facilitating the operator to precisely control the adjustment process and ensuring that the first space 111 reaches the required vacuum degree. Similarly, the second vacuum gauge 17 is installed on a pipeline communicated with the second space 121. The second vacuum gauge 17 is configured to detect the vacuum degree of the second space 121. The second vacuum gauge 17 can accurately display the real-time value of the vacuum degree of the second space 121, facilitating the operator to precisely control the adjustment process and ensuring that the second space 121 reaches the required vacuum degree.

[0042] As an alternative implementation, as Figure 5 shown, the torque sensing module 14 includes a torque sensor 141. One end of the torque sensor 141 is in transmission connection with the valve shaft 22, and the other end of the torque sensor 141 is connected to the transmission shaft of the driving motor 300 through a coupling 142.

[0043] Specifically, one end of the torque sensor 141 is in driving connection with the valve shaft 22. When the valve shaft 22 of the butterfly valve 200 rotates, the generated torque can be accurately transmitted to the torque sensor 141. The torque sensor 141 collects the torque of the valve shaft 22 of the butterfly valve 200 to form a torque curve of the butterfly valve 200. The other end of the torque sensor 141 is connected to the transmission shaft of the driving motor 300 through a coupling 142. The driving motor 300 provides power for the rotation of the valve shaft 22 of the butterfly valve 200. The coupling 142 can stably transmit the torque of the driving motor 300 to the valve shaft 22, and at the same time transmit the reaction torque generated by the rotation of the valve shaft 22 back to the torque sensor 141. The torque sensor 141 collects the torque value of the driving motor 300 through the coupling 142 to obtain the performance data of the butterfly valve 200.

[0044] As an alternative implementation, as Figure 5 shown, the rotational torque testing device 100 includes a base 18. The base 18 includes a load fixing device part 181, a torque sensing module fixing part 182, and a motor fixing device part 183. The load fixing device part 181 is configured to fixedly install the butterfly valve 200 to ensure that the butterfly valve 200 does not displace or shake during the test, thereby ensuring the accuracy of the test data. The torque sensing module fixing part 182 is adjacent to the load fixing device part 181. The torque sensing module fixing part 182 provides a stable and reliable installation position for the torque sensing module 14 to fixedly install the torque sensing module 14. The torque sensing module fixing part 182 is firmly connected to the base 18 by bolts or the like to prevent displacement due to vibration or external forces during the test. The motor fixing device part 183 is adjacent to the torque sensing module fixing part 182 and is configured to fixedly install the driving motor 300 and ensure that its output shaft is precisely aligned with the transmission axis of the torque sensor 141. Optionally, the motor fixing device part 183 realizes the firm fixation of the driving motor 300 by adjusting the mounting hole positions or using adjustable fixtures.

[0045] As an alternative implementation, the motor fixing device part 183 includes a moving workbench 1831, which is configured to control the driving motor 300 to move in one or more of the following directions: up and down direction, left and right direction, front and back direction, so as to ensure that the transmission axis of the output shaft of the driving motor 300, the torque sensor 141 and the valve shaft 22 of the butterfly valve 200 are strictly aligned, guarantee the coaxiality among the driving motor 300, the torque sensor 141 and the valve shaft 22 of the butterfly valve 200, and avoid measurement errors caused by installation deviations. The moving workbench 1831 can be composed of a high-precision mechanical structure (such as a screw lift, a cross slide or a linear guide rail), and the position of the driving motor 300 is adjusted manually or electrically to ensure that there is no additional bending moment or radial load when the coupling 142 transmits torque, thereby improving the accuracy of torque measurement. Through the coordinated adjustment of the moving workbench 1831, the testing device 100 can achieve high-precision and high-stability torque transmission, providing a reliable guarantee for the performance evaluation of the butterfly valve 200 under different vacuum pressure differences.

[0046] According to the above description, a rotational torque testing device for a butterfly valve provided by the present application independently controls the vacuum degrees of the two regions on both sides of the butterfly valve 200 through the vacuum pumping module 13, forms different pressure difference combinations from high vacuum degree to low vacuum degree on both sides of the valve plate 23, accurately simulates different vacuum pressure difference conditions that the butterfly valve 200 may encounter in actual working conditions, and meets diverse testing requirements. By simulating different pressure difference conditions, the torque values of the butterfly valve 200 and the driving motor 300 under different pressure differences are measured, so as to obtain the torque dynamic curve of the butterfly valve 200, evaluate the torque characteristics of the butterfly valve 200 under different working conditions, and provide data support for testing the quality of the butterfly valve 200 or optimizing the design of the butterfly valve 200. Moreover, the pressure regulating module 15 adjusts the pressure values in the spaces on both sides of the valve plate 23 of the butterfly valve 200 through controllable air supplementing operations, effectively avoids pressure fluctuations caused by over-pumping, and improves the stability of the testing environment.

[0047] In a second aspect, the present application also provides a rotational torque testing method for a butterfly valve. This rotational torque testing method applies the rotational torque testing device described above, and this rotational torque testing method includes the following steps: Step S11, evacuate the first space 111 and / or the second space 121 to form a pressure difference between the first space 111 and the second space 121.

[0048] Step S12, test the torque value of the butterfly valve 200 under different pressure differences.

[0049] Connect the vacuum pumping device to the first space 111, and denote the target vacuum degree of the first space 111 as V1, and the target vacuum degree of the first space 111 as V2. As Figure 6As shown in the figure, when evacuating the butterfly valve 200 with the valve plate 23 of the butterfly valve 200 in the first state, the first space 111 is communicated with the second space 121 at this time. When the vacuum degrees of the first space 111 and the second space 121 are greater than the target vacuum degree V2, turn off the vacuum pump and stabilize the pressures on both sides of the valve plate 23 of the butterfly valve 200. At this time, inject gas. When the vacuum degrees of the first space 111 and the second space 121 reach the target vacuum degree V2, stop gas transmission and close the butterfly valve 200. At this time, the vacuum degree of the second space 121 is the target vacuum degree V2.

[0050] Turn on the vacuum pump again to evacuate the first space 111. If the vacuum degree of the first space 111 is greater than the target vacuum degree V1, turn off the vacuum pump and stabilize the pressures on both sides of the valve plate 23 of the butterfly valve 200. At this time, inject gas into the first space 111. When the vacuum degree of the first space 111 is the target vacuum degree V1, stop gas transmission to the first space 111. Thus, a vacuum pressure difference is formed on both sides of the valve plate 23 of the butterfly valve 200, simulating the pressure difference environment of the butterfly valve 200 under different working conditions and improving the accuracy of test data.

[0051] A method for testing the rotational torque of a butterfly valve 200 provided by the present application can measure the torque value of the butterfly valve 200 and the torque value of the driving motor 300 under different pressure differences by simulating different pressure difference conditions, and obtain the torque dynamic curve of the butterfly valve 200.

[0052] It can be understood that the term "exemplary" used herein means "as an example, illustration, or explanation". Any embodiment described as "exemplary" is not necessarily preferred or superior to other embodiments and / or does not exclude combining the features of other embodiments. It should be understood that certain features of the present application described in the context of separate embodiments can also be provided in a single embodiment by combination. Conversely, various features of the present application described in the context of a single embodiment can also be provided separately or in any suitable combination or as any other described embodiment of the present application.

[0053] In the description of the present application, unless otherwise specified, " / " means "or". For example, A / B can represent A or B. The "and / or" herein is merely a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, "at least one" means one or more, and "a plurality" means two or more. The words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" do not necessarily limit being different.

[0054] The above-disclosed are only the preferred embodiments of the present application, but they are not intended to limit the scope of the rights of the present application. Those of ordinary skill in the art can understand that within the spirit and scope of the present application and the appended claims, changes, modifications, substitutions, combinations, and simplifications should all be equivalent replacement methods and still fall within the scope covered by the invention.

Claims

1. A rotation torque test device for a butterfly valve, applied to the rotation torque test of a butterfly valve, the butterfly valve comprising: Valve body; A valve shaft, a first end of the valve shaft extends into the interior of the valve body, a second end of the valve shaft extends out of the valve body, and is configured to rotate along the axis of the valve shaft; A valve plate, the valve plate is disposed in the valve body, fixedly connected to the valve shaft, and configured to rotate with the valve shaft; Characterized in that the rotation torque testing device comprises: a first vacuum cover configured to be connected to one side of the valve body and to enclose the valve body to form a first space; a second vacuum cover configured to be connected to the other side of the valve body and to enclose the valve body to form a second space; when the valve plate is in a first state, the first space is connected to the second space, and when the valve plate is in a second state, the first space is isolated from the second space; A vacuum pumping module, wherein the vacuum pumping module is used to vacuum the first space and / or the second space to form a pressure difference between the first space and the second space; The torque sensing module is configured to be connected to the second end of the valve shaft and is used to test the torque value of the butterfly valve under different pressure differences.

2. The rotation torque test device of a butterfly valve according to claim 1, characterized in that: The vacuum pump module includes a vacuum pump connected to the first space, and the vacuum pump is configured to vacuum the first space and the second space when the valve plate is in a first state, and to vacuum the first space when the valve plate is in a second state.

3. The rotation torque test device of a butterfly valve according to claim 1, characterized in that: The rotation torque testing device also includes: A pressure regulating module is configured to adjust the vacuum degree of the first space and / or the second space by ventilating the first space and / or the second space.

4. The rotation torque test device of a butterfly valve according to claim 3, characterized in that: The voltage regulating module comprises: a gas tank, the gas tank being connected to the first space or the second space through a pipeline; The air intake control unit is connected to the gas tank through a pipeline and is configured to control the amount of air intake into the first space or the second space.

5. The rotation torque test device of a butterfly valve according to claim 3, characterized in that: The voltage regulating module comprises: a first gas tank, the first gas tank being connected to the first space through a pipeline; a first air intake control unit, connected to the first air tank through a pipeline, and configured to control the amount of air intake into the first space; a second gas tank, the second gas tank being connected to the second space through a pipeline; The second air intake control unit is connected to the second air tank through a pipeline and is configured to control the amount of air intake into the second space.

6. The rotation torque test device of a butterfly valve according to claim 1, characterized in that: The rotation torque testing device further includes a first vacuum gauge and a second vacuum gauge. The first vacuum gauge is configured to detect the vacuum degree of the first space, and the second vacuum gauge is configured to detect the vacuum degree of the second space.

7. The rotation torque test device of a butterfly valve according to claim 1, characterized in that: The torque sensing module includes a torque sensor, one end of which is used for transmission connection with the valve shaft, and the other end of which is used for connection with the transmission shaft of the driving motor through a coupling.

8. The rotation torque testing device of a butterfly valve according to claim 7, characterized in that: The rotation torque testing device comprises a base, The base comprises: A load fixture portion configured to securely mount the butterfly valve; a torque sensing module fixing portion, adjacent to the load fixing device portion, configured to fix and install the torque sensing module; The motor fixing device part is adjacent to the torque sensing module fixing part and is configured to fix and install the driving motor.

9. The rotation torque test device of a butterfly valve according to claim 8, characterized in that: The motor fixing device part includes a moving workbench, and the moving workbench is configured to control the driving motor to move in one or more of the following directions: up and down direction, left and right direction, and front and back direction.

10. A method for testing the rotation torque of a butterfly valve, characterized in that: The rotation torque test method uses the rotation torque test device according to any one of claims 1 to 9, and the rotation torque test method comprises the following steps: The first space and / or the second space are evacuated to form a pressure difference between the first space and the second space. The torque value of the butterfly valve under different pressure differences was tested.

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