Independent valve detection tool

Abstract

The utility model discloses an independent valve detection tool, which solves the problem that the structural design and the detection process of a tool for detecting the opening torque and the power consumption of a valve in the prior art are relatively complicated, and comprises a bottom plate, two jacking cylinders are arranged on the bottom plate and are connected with an air inlet pipe and an exhaust pipe, and the air inlet pipe and the exhaust pipe are connected with an air outlet pipe. An actuator is installed on the bottom plate and located between the two jacking cylinders, a valve rod of a tested valve is connected with the actuator, and ports in the two sides of the tested valve are connected with the two jacking cylinders. According to the utility model, the torque and power consumption when the valve is opened can be simply, conveniently and directly detected, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve torque detection technology, specifically providing an independent valve testing fixture. Background Technology

[0002] Valves are the most important equipment in fluid control and are widely used in water and gas transmission pipelines. Water and gas transmission pipelines often carry operating pressure, so valve operation must meet the requirements of a pressurized working environment. Otherwise, a large pressure difference will cause the torque of the electric valve to increase sharply and the power consumption to rise significantly during opening, severely shortening the conventionally calculated lifespan of the valve. Therefore, a device is needed to detect the torque and power consumption of a pressurized electric valve during opening.

[0003] Existing methods for detecting the torque of electric valves include torque sensor methods, strain gauge methods, force sensor methods, and electrical parameter methods. For example, a "Comprehensive Testing Device for Rotary Valve Electric Actuator" disclosed in Chinese patent literature (publication number CN110579345A) connects a movable friction disc and a torque sensor to the valve via a coupling. Two cylinders alternately output thrust to the movable friction disc, generating varying pressure, which causes the fixed friction disc to produce varying frictional force on the movable friction disc, thus subjecting the valve to different torques. The torque sensor measures the changes in actuator torque. However, the structural design of this testing fixture and the testing process are relatively complex, and it cannot easily and directly detect the torque and power consumption when the valve is opening. Utility Model Content

[0004] To address the problem that the existing fixtures for detecting valve opening torque and power consumption are complex in both structure and process, this invention provides an independent valve detection fixture that can easily and directly detect the torque and power consumption when the valve is opening, thereby improving detection efficiency.

[0005] The specific solution of this utility model is as follows.

[0006] An independent valve testing fixture includes a base plate on which two clamping cylinders are mounted. Each clamping cylinder is connected to an air inlet pipe and an air outlet pipe. An actuator is mounted on the base plate between the two clamping cylinders. The valve stem of the valve under test is connected to the actuator, and the two side ports of the valve under test are connected to the two clamping cylinders.

[0007] The two clamping cylinders are connected to the ports of the valve under test, and the actuator can drive the valve to open and close. When the two clamping cylinders are not inlet or outlet air, the pressure at both ports of the valve under test is the same, and there is no pressure difference. In this case, the actuator drives the valve to open and close, and the operating current of the actuator in the no-pressure mode is obtained. When one clamping cylinder is supplied with a set pressurized air and the other clamping cylinder does not operate, the pressure at both ports of the valve under test is different, creating a pressure difference. In this case, the actuator drives the valve to open and close, and the operating current of the actuator in the pressurized mode is obtained. Based on the measured operating current, the torque and power consumption when the valve is opened, as well as the lifespan of the dry cell battery, can be accurately calculated. This invention provides a simple and direct solution for detecting the torque and power consumption when a valve is opened.

[0008] Preferably, the clamping cylinder includes a clamping tube and two quick connectors. The clamping tube is retractable on the clamping cylinder. The valve under test is placed between the two clamping cylinders. The clamping tube presses against the two ports of the valve under test. The two quick connectors are respectively connected to the air inlet pipe and the air outlet pipe.

[0009] The two clamping cylinders are located at both ends of the base plate. They clamp and hold the valve under test at both ends via clamping tubes, thus fixing the valve and simultaneously connecting it to the valve's ports to create a pressure difference across the valve. The quick-connect fittings can accommodate different pressures and reduce the possibility of leakage.

[0010] Preferably, the end of the clamping cylinder that contacts the base plate has a clamping cylinder through hole, and a corresponding clamping cylinder fixing hole is provided on the base plate. Fastening screws pass through the clamping cylinder through hole and the clamping cylinder fixing hole in sequence to fix the clamping cylinder to the base plate. The end of the clamping cylinder that contacts the base plate has a connecting lug, and the clamping cylinder through hole is located on the connecting lug.

[0011] Preferably, the actuator includes a flat-plate shaft connected to the valve stem of the valve under test, thereby connecting the actuator to the valve under test. At the same time, the two ports of the valve under test are aligned with the clamping tubes of the two clamping cylinders, so that the clamping tubes can clamp and press against the two ports of the valve under test.

[0012] Preferably, the actuator drives the flat shaft to open or close the valve under test, thereby obtaining the operating current of the actuator.

[0013] When there is no pressure difference across the valve under test, the operating current of the actuator in no-pressure mode is obtained; when there is a pressure difference across the valve under test, the operating current of the actuator in pressurized mode is obtained. Based on the measured operating current, the torque and power consumption when the valve is opened, as well as the lifespan of the dry cell battery, can be calculated.

[0014] Preferably, the base plate has irregularly shaped holes that match the shape of the actuator, the actuator has an actuator through hole at the contact point with the base plate, and the base plate has an actuator fixing hole at a corresponding position. Fastening screws pass through the actuator through hole and the actuator fixing hole in sequence to fix the actuator on the base plate.

[0015] Preferably, two fixing blocks are also installed on the base plate. The fixing blocks are in the shape of a "Z". The fixing blocks have a fixing edge and a guide angle at the contact end with the valve being tested. The fixing edge contacts the positioning edge of the valve being tested.

[0016] When installing the valve under test on the testing fixture, the valve is placed upside down on the actuator along the guide angle, so that the flat shaft is connected to the valve stem of the valve under test, and the positioning edge of the valve under test is in close contact with the fixing edge of the fixing block for positioning the valve under test. The valve under test is placed upside down in a simple, foolproof manner, without the need for complicated positioning operations, and the positioning and fixing of the valve under test can be achieved with one hand.

[0017] Preferably, the end of the fixing block that contacts the base plate is provided with a fixing block through hole, and a fixing block fixing hole is provided at a corresponding position on the base plate. The fastening screw passes through the fixing block through hole and the fixing block fixing hole in sequence to fix the fixing block on the base plate.

[0018] Preferably, the end of the fixing block that contacts the base plate and the side of the bend are provided with blunt edges. The blunt edge design helps guide the fixing block into the correct position, reducing adjustment time during assembly and thus improving assembly speed.

[0019] Preferably, the four corners of the base plate are set as obtuse angles. The obtuse angles reduce the risk of accidental injury to operators and also reduce the likelihood of damage due to collisions.

[0020] Therefore, this utility model has the following beneficial effects:

[0021] (1) By pressing the two ports of the valve under test against the pressing tubes on the two pressing cylinders, the valve under test is fixed and a pressure difference is generated on both sides of the valve under test.

[0022] (2) The valve is opened and closed by the actuator, and the working current of the actuator in both pressure and no-pressure modes is obtained, so as to realize the accurate calculation of the torque and power consumption when the valve is opened and closed, as well as the service life of the dry cell battery;

[0023] (3) The valve under test is placed upside down in a simple way, without the need for complicated positioning operations. The valve under test can be positioned and fixed with one hand.

[0024] (4) Using gaseous fluid instead of water fluid for detection results in environmentally friendly detection conditions, readily available sources, and simple input / output structure;

[0025] This invention enables a simple and direct detection of the torque and power consumption when a valve is opened, thereby improving detection efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an independent valve testing fixture according to the present invention.

[0028] Figure 2 This is a cross-sectional schematic diagram of an independent valve testing fixture according to the present invention.

[0029] Figure 3 This is an isometric view of the base plate of this utility model.

[0030] Figure 4 This is an isometric view of the fixing block of this utility model.

[0031] In the diagram: 1. Base plate; 11. Irregular hole; 12. Tightening cylinder fixing hole; 13. Actuator fixing hole; 14. Fixing block fixing hole; 15. Obtuse angle; 2. Tightening cylinder; 21. Tightening tube; 22. Quick connector; 3. Actuator; 31. Flat platform shaft; 32. Actuator through hole; 4. Fixing block; 41. Fixing edge; 42. Guide angle; 43. Fixing block through hole; 44. Obtuse edge; 5. Valve under test; 51. Positioning edge; 6. Fastening screw. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0033] like Figure 1The diagram shows the overall structure of an independent valve testing fixture according to this invention. The fixture consists of a base plate 1, two clamping cylinders 2, an actuator 3, and a fixing block 4. The two clamping cylinders 2 are mounted at both ends of the base plate 1, forming a cuboid shape. During operation, the valve 5 to be tested is installed in the middle position between the two clamping cylinders 2. Two quick connectors 22 are arranged side-by-side on one side of each clamping cylinder 2, connecting to an inlet pipe and an outlet pipe respectively. The quick connectors 22 are designed to accommodate different pressures and reduce the possibility of leakage. Pressurized air can be input into the clamping cylinder 2 through the connected inlet pipe, adjusting the internal air pressure to the desired level. Air can be discharged from the clamping cylinder 2 through the outlet pipe. Alternatively, the fixture can remain inactive, neither inputting nor outputting air, with the internal air pressure matching the external atmospheric pressure. Clamping pipes 21 are provided on the opposite surfaces of the two clamping cylinders 2, and these pipes are extendable and retractable. When the valve under test 5 is installed on the testing fixture, the valve under test 5 is placed between the two clamping tubes 21, and the two side ports of the valve under test 5 are aligned with the two clamping tubes 21. Then the two clamping tubes 21 are extended and clamped to the two side ports of the valve under test 5, so that the clamping cylinder 2 is connected to the two side ports of the valve under test 5, thereby generating a set pressure difference at both ends of the valve under test 5, and also fixing the valve under test 5 without the need for an additional fixing device for fixing the valve under test 5.

[0034] Figure 1 The two clamping cylinders 2 are arranged in opposite directions, and the quick connectors 22 on the two clamping cylinders 2 are not located on the same side. Only one clamping cylinder 2 needs to be supplied with the set pressurized air through the air inlet pipe, while the other clamping cylinder 2 does not operate, so that a set pressure difference can be generated on both sides of the valve under test 5. At this time, the valve under test 5 is under pressure. When neither clamping cylinder 2 operates, the air pressure on both sides of the valve under test 5 is the same. At this time, there is no pressure difference on both sides of the valve under test 5, and it is under no pressure.

[0035] Two connecting ears are symmetrically arranged on both sides of the bottom of the clamping cylinder 2. The edges of the connecting ears are aligned with the edges of the base plate 1. Each connecting ear has two clamping cylinder through holes, which are smooth holes. Figure 3 The figure shown is an isometric view of the base plate of this utility model. A clamping cylinder fixing hole 12 is provided on the base plate 1 at a position corresponding to the clamping cylinder through hole. The clamping cylinder fixing hole 12 is a threaded hole structure. The clamping cylinder 2 is fixed on the base plate 1 by passing the fastening screw 6 through the clamping cylinder through hole and the clamping cylinder fixing hole 12 in sequence and tightening it.

[0036] An actuator 3 is positioned between the two clamping cylinders 2. The actuator 3 is installed in the middle of the base plate 1, at the same distance from the clamping cylinders 2 on both the left and right sides. Figure 2The diagram shown is a cross-sectional view of an independent valve testing fixture according to this invention. A flat-plate shaft 31 is located at the center of the top of the actuator 3, for connecting to the valve stem of the valve under test 5. Starting the actuator 3 drives the valve under test 5 to open or close via the flat-plate shaft 31, simultaneously obtaining the operating current of the actuator 3. When there is no pressure difference across the valve under test 5, the operating current of the actuator 3 in no-pressure mode is obtained; when there is a pressure difference across the valve under test 5, the operating current of the actuator 3 in pressure mode is obtained. Based on the measured operating current, the torque and power consumption of the valve under test 5 during opening and closing, as well as the lifespan of the dry cell battery, can be calculated. When the valve stem of the valve under test 5 is connected to the flat-plate shaft 31 of the actuator 3, the clamping tubes 21 on the two clamping cylinders 2 are aligned with the two side ports of the valve under test 5, facilitating the fixation of the valve under test 5 via the two clamping tubes 21.

[0037] In such Figure 3 In the isometric view of the base plate shown, the base plate 1 has irregularly shaped holes 11 that match the shape of the actuator 3, forming a cross shape. The bottom of the actuator 3 passes through the irregularly shaped holes 11 on the base plate 1 and is located on the lower side of the base plate 1. The top of the actuator 3 has a square structure and is located on the upper side of the base plate 1, and is fixedly connected to the base plate 1. Actuator through holes 32 are provided at the four corners of the top of the actuator 3. These through holes 32 are smooth holes. Correspondingly, actuator fixing holes 13 are provided on the base plate 1. These fixing holes 13 are threaded holes and are evenly distributed around the irregularly shaped holes 11. The actuator 3 is fixed to the base plate 1 by passing fastening screws 6 sequentially through the actuator through holes 32 and the actuator fixing holes 13 and tightening them.

[0038] When neither of the two clamping cylinders 2 is in operation (intake or exhaust), the pressure at both ends of the tested valve 5 is the same, with no pressure difference. In this case, the actuator 3 is activated to open and close the tested valve 5, yielding the operating current of the actuator 3 in pressureless mode. When one clamping cylinder 2 is supplied with pressurized air while the other is not activated, the pressure at both ends of the tested valve 5 is different, creating a pressure difference. In this case, the actuator 3 is activated to open and close the tested valve 5, yielding the operating current of the actuator 3 in pressurized mode. Based on the measured operating current, the torque and power consumption when the tested valve 5 is opened, as well as the lifespan of the dry cell battery, can be accurately calculated. This invention provides a simple and direct method for detecting the torque and power consumption when a valve is opened.

[0039] In a preferred embodiment, two fixing blocks 4 are also installed on the base plate 1. The two fixing blocks 4 are symmetrically arranged on both sides of the actuator 3, and also on both sides of the valve under test 5. The line connecting the two fixing blocks 4 is perpendicular to the line connecting the two clamping cylinders 2. Figure 4The image shown is an isometric view of the fixing block of this invention. The fixing block 4 is Z-shaped, with its lower surface tightly attached to the base plate 1 and the actuator 3. The two fixing blocks 4 have fixing edges 41 and guide angles 42 on their opposite sides. The valve under test 5 has two positioning edges 51 on both sides. When the valve under test 5 is installed on the testing fixture, it is placed upside down on the actuator 3 along the guide angles 42, connecting the flat shaft 31 to the valve stem of the valve under test. The positioning edges 51 of the valve under test are tightly attached to the fixing edges 41 of the fixing blocks 4, for positioning the valve under test 5. The valve under test 5 can be placed upside down in a simple, intuitive manner, requiring no complex positioning operations; positioning and fixing of the valve under test 5 can be achieved with just one hand.

[0040] Two fixing block through holes 43 are symmetrically arranged at the end of the fixing block 4 that contacts the base plate 1. The fixing block through holes 43 are smooth holes. The base plate 1 has a fixing block fixing hole 14 at the corresponding position. The fixing block fixing hole 14 is a threaded hole. The fixing block 4 is fixed to the base plate 1 by passing the fixing block through holes 43 and fixing block fixing holes 14 through the fixing screws 6 in sequence and tightening them.

[0041] The outer edge of the fixing block 4 is aligned with the edge of the base plate 1. The two corners of the fixing block 4 at this point are set as blunt edges 44, and the top bend of the fixing block 4 is also set as a blunt edge 44. The design of the blunt edges 44 helps guide the fixing block 4 into the correct position, reducing the adjustment time during the assembly process and thus improving the assembly speed.

[0042] In a preferred embodiment, the four corners of the base plate 1 are obtuse angles of 15°. By setting the four corners of the base plate 1 to obtuse angles of 15°, the risk of accidental injury to operators during operation can be reduced, and the probability of the testing fixture being damaged by collision can also be reduced.

[0043] The assembly process of an independent valve testing fixture according to this utility model is as follows.

[0044] First, place two clamping cylinders 2 at both ends of the base plate 1. The clamping tubes 21 of the two clamping cylinders 2 are opposite and aligned. The clamping cylinder through holes on the clamping cylinders 2 are aligned with the corresponding clamping cylinder fixing holes 12 on the base plate 1. Pass the fastening screws 6 through the clamping cylinder through holes and clamping cylinder fixing holes 12 in sequence and tighten them to fix the clamping cylinders 2 on the base plate 1. Next, invert the actuator 3 and pass it through the irregular hole 11 on the base plate 1 until the surface of the actuator through hole 32 of the actuator 3 rests on the upper surface of the base plate 1. The actuator through hole 32 of the actuator 3 is aligned with the corresponding actuator fixing hole 13 on the base plate 1. Pass the fastening screws 6 through the actuator through hole 32 and actuator fixing hole 13 in sequence and tighten them to fix the actuator 3 on the base plate 1. Finally, place the fixing block 4 on the base plate 1, align the fixing block through hole 43 on the fixing block 4 with the corresponding fixing block fixing hole 14 on the base plate 1, pass the fastening screw 6 through the fixing block through hole 43 and the fixing block fixing hole 14 in sequence and tighten them, fix the fixing block 4 on the base plate 1, and complete the assembly of the independent valve testing fixture of this utility model.

[0045] The working process of the independent valve testing fixture of this utility model is as follows.

[0046] First, the valve under test 5 is placed upside down on the actuator 3 along the guide angle 42 on the fixing block 4, so that the flat platform shaft 31 is connected to the valve stem of the valve under test 5, and the positioning edge 51 of the valve under test 5 is pressed tightly against the fixing edge 41 on the fixing block 4, thus positioning the valve under test 5. Then, the clamping cylinders 2 on both sides extend the clamping tubes 21 to clamp and press against the two ports of the valve under test 5, completing the fixed installation of the valve under test 5. The valve under test 5 is placed upside down in a simple manner, without complicated positioning operations, and the positioning and fixing of the valve under test 5 can be achieved with one hand.

[0047] When the valve under test 5 is depressurized, the air pressure in the two clamping cylinders 2 is the same, that is, the air pressure at both ports of the valve under test 5 is the same. At this time, the actuator 3 is started, first driving the valve under test 5 to open, and the working current of the actuator 3 when the valve is open without pressure is recorded. Then the actuator 3 drives the valve under test 5 to close, and the working current of the actuator 3 when the valve is closed without pressure is recorded.

[0048] When the valve under test 5 is pressurized, that is, one end of the clamping cylinder 2 is supplied with pressurized air through the air inlet pipe, while the other end of the clamping cylinder 2 does not move, a pressure difference is generated at the two ports of the valve under test 5. The actuator 3 is started, first driving the valve under test 5 to open, and the operating current of the actuator 3 when the pressurized valve is opened is recorded. The actuator 3 then drives the valve under test 5 to close, and the operating current of the actuator 3 when the pressurized valve is closed is recorded.

[0049] Based on the measured operating current of actuator 3, the torque and power consumption of the valve 5 under test when it is opened and closed, as well as the service life of the dry cell battery, can be calculated.

[0050] This invention uses the clamping tubes 21 on two clamping cylinders 2 to clamp the two ports of the valve 5 under test, thus fixing the valve 5 and creating a pressure difference on both sides of the valve 5. The valve is opened and closed by the actuator 3, and the operating current of the actuator 3 in both pressurized and non-pressurized modes is obtained, enabling accurate calculation of the torque and power consumption when the valve is opened, as well as the lifespan of the dry cell battery. The valve 5 can be placed upside down without complex positioning operations, allowing for single-handed positioning and fixing. Using air instead of water for detection provides environmentally friendly testing conditions, readily available resources, and a simple input / output structure. This invention, through the above solution, can easily and directly detect the torque and power consumption when the valve is opened, improving testing efficiency.

[0051] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the present utility model. Any simple modifications, alterations, or equivalent structural transformations made to the above embodiments based on the technical essence of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An independent valve testing fixture, characterized in that, The device includes a base plate on which two clamping cylinders are mounted. Each clamping cylinder is connected to an air inlet pipe and an air outlet pipe. An actuator is mounted on the base plate between the two clamping cylinders. The valve stem of the valve under test is connected to the actuator, and the two side ports of the valve under test are connected to the two clamping cylinders.

2. The independent valve testing fixture according to claim 1, characterized in that, The clamping cylinder includes a clamping tube and two quick connectors. The clamping tube is retractable on the clamping cylinder. The valve under test is placed between the two clamping cylinders. The clamping tube presses against the two sides of the valve under test. The two quick connectors are respectively connected to the air inlet pipe and the air outlet pipe.

3. The independent valve testing fixture according to claim 2, characterized in that, The end of the clamping cylinder that contacts the base plate is provided with a clamping cylinder through hole, and a clamping cylinder fixing hole is provided at a corresponding position on the base plate. The fastening screw passes through the clamping cylinder through hole and the clamping cylinder fixing hole in sequence to fix the clamping cylinder to the base plate.

4. The independent valve testing fixture according to claim 1, characterized in that, The actuator includes a flat-plate shaft, which is connected to the valve stem of the valve being tested.

5. The independent valve testing fixture according to claim 4, characterized in that, The actuator drives the flat shaft to open or close the valve under test, and the operating current of the actuator is obtained.

6. The independent valve testing fixture according to claim 5, characterized in that, The base plate has irregularly shaped holes that match the shape of the actuator. The actuator has through holes at the contact point between the actuator and the base plate. The base plate has corresponding actuator fixing holes. Fastening screws pass through the actuator through holes and the actuator fixing holes in sequence to fix the actuator to the base plate.

7. The independent valve testing fixture according to claim 1, characterized in that, Two fixing blocks are also installed on the base plate. The fixing blocks are in the shape of a "Z". The fixing blocks have a fixing edge and a guide angle at the contact end with the valve being tested. The fixing edge contacts the positioning edge of the valve being tested.

8. The independent valve testing fixture according to claim 7, characterized in that, The fixing block has a fixing block through hole at the end that contacts the base plate, and a fixing block fixing hole is provided at the corresponding position on the base plate. The fastening screw passes through the fixing block through hole and the fixing block fixing hole in sequence to fix the fixing block on the base plate.

9. The independent valve testing fixture according to claim 8, characterized in that, The fixed block has a blunt edge at the end that contacts the base plate and at the bend.

10. An independent valve testing fixture according to any one of claims 1 to 9, characterized in that, The four corners of the base plate are set as obtuse angles.

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