A Switch Life Test Device for a Valve Electric Drive Device

Abstract

The present invention provides a switch life test device for a valve electric drive device, comprising: a body, an extension plate, a pressure sensor, a pressure guiding column disposed directly below the pressure sensor, with its upper end abutting against the pressure sensor; a control rotating tube coaxially arranged with the pressure guiding column and rotatably connected to the extension plate, having an internal thread provided on its inner peripheral side; an adjustment tube coaxially located inside the control rotating tube and supporting the pressure guiding column, with an external thread provided on its outer peripheral surface; a limit column arranged along the axial direction of the adjustment tube, one end of which is fixedly connected to the lower surface of the extension plate, and the other end passes through the adjustment tube and is slidably connected to the adjustment tube; a limit slider which passes through the upper end surface of the control rotating tube and slides in the direction of the center of the control rotating tube along the cross-sectional diameter direction of the control rotating tube; a driving structure is provided between the limit slider and the extension plate to drive the limit slider to reciprocally slide in the direction of the center of the control rotating tube. By means of displacement limiting of the guiding column, this technical solution keeps away from the pressure sensor, avoiding damage to the pressure sensor.

Description

Technical Field

[0001] The present invention generally relates to the field of test devices, and particularly relates to a switch life test device for an electric valve driving device. Background Art

[0002] The operating torque of an electric valve is larger than that of an ordinary valve. The opening and closing speed of an electric valve can be adjusted. It has a simple structure and is easy to maintain. It can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media.

[0003] One of the life test devices, such as the "switch life test device for an electric valve driving device" disclosed in the application number 201921925994.2. In this switch life test device for an electric valve driving device, a pressure sensor is welded to the right side of the casing, and a support plate is welded to the middle of the bottom end of the pressure sensor. A middle plate is arranged at the bottom end of the support plate, and two springs are arranged on the left and right sides of the top end of the middle plate. Both the upper and lower ends of the two springs are fixedly connected with magnetic blocks, and the outer sides of the magnetic blocks are respectively embedded with the support plate and the middle plate. A pressure column is arranged through the middle of the support plate and the middle plate, and the top end of the pressure column is in contact with the pressure sensor.

[0004] The upper end of its pressure column is directly in contact with the pressure sensor. During transportation, there is no limiting structure for the pressure column, so that the vibration of the pressure column will cause deformation to the pressure sensor. If the sliding distance of the pressure column is large, it is very easy to damage the pressure sensor, thus affecting the test accuracy of the life test device. Summary of the Invention

[0005] In view of the problems existing in the above-mentioned prior art according to the present invention, a switch life test device for an electric valve driving device is provided, including: a machine body, an extension plate, one end of which is fixed to the side wall of the machine body and a pressure sensor is arranged inside it; a pressure guiding column, arranged directly below the pressure sensor, and its upper end abuts against the triggering end of the pressure sensor; a control rotating tube, coaxially arranged with the pressure guiding column, and its upper end surface is rotatably connected with the extension plate around the control rotation axis, and an internal thread is provided on its inner peripheral side; an adjustment tube, coaxially located inside the control rotating tube and supporting the pressure guiding column, and an external thread that is in threaded cooperation with the inner wall of the control rotating tube is provided on its outer peripheral surface; a limiting column, arranged along the axial direction of the adjustment tube, one end of which is fixedly connected to the lower surface of the extension plate, and the other end passes through the adjustment tube and is slidably connected with the adjustment tube; a limiting slider, which passes through the upper end surface of the control rotation and slides towards the center direction of the control rotating tube along the diameter direction of the cross section of the control rotating tube; a driving structure for driving the limiting slider to reciprocally slide towards the center direction of the control rotating tube is arranged between the limiting slider and the extension plate.

[0006] With the above technical features, by controlling the rotation of the swivel tube, the displacement tube is driven to move downward, so that the upper end surface of the pressure guiding column is separated from the contact with the pressure sensor; further, the limiting slider moves towards the center direction of the control swivel tube, thus restricting the direct contact between the upper end of the pressure guiding column and the pressure sensor, ensuring the safety of the triggering area of the pressure sensor and avoiding damage to the pressure sensor.

[0007] In some embodiments, on the relatively corresponding areas of the lower surface of the extension plate and the upper end surface of the control swivel tube, obliquely arranged guiding grooves are coaxially formed. There are a plurality of the guiding grooves and they are evenly distributed circumferentially around the pressure sensor.

[0008] On the side wall of the limiting slider that fits with the extension plate, a guiding column located in the guiding groove protrudes. Thus, during the rotation of the control swivel tube, the limiting slider is driven to move. Through the guiding cooperation between the guiding groove and the guiding column, the limiting slider is driven to move towards the center direction of the control swivel tube, so that the end of the limiting slider is on the stroke of the pressure guiding column, restricting the contact between the cross section of the pressure guiding column and the pressure sensor.

[0009] In some embodiments, it further includes: a limiting sliding groove, which is arranged in a ring shape and is formed on the outer peripheral side of the extension plate where the guiding groove is located; limiting sliding rods, at least two of which are arranged on the outer peripheral side of the control swivel tube and are located in the limiting sliding groove and are slidably connected to the inner wall of the limiting sliding groove. Thus, through the sliding of multiple limiting sliding rods in the limiting sliding groove, the rotation of the control swivel tube and the extension plate is ensured, and the upper end surface of the control swivel tube and the extension plate are mutually attached, ensuring the normal sliding of the limiting slider.

[0010] In some embodiments, a limiting ring is fixedly connected to the outer peripheral side of the pressure guiding column, and the limiting ring supports on the upper end surface of the displacement tube. Thus, the limiting ring abuts against the upper end surface of the displacement tube, which not only does not affect the pressure conduction between the pressure guiding column and the pressure sensor, but also restricts the position area of the upper end surface of the pressure guiding column, realizing the stability of pressure measurement.

[0011] In some embodiments, at least two limiting sliders are provided. Thus, by providing multiple limiting sliders, the contact area between the pressure guiding column and the limiting sliders is increased, making the force on the pressure guiding column more balanced and avoiding structural damage to the pressure guiding column due to relatively large local pressure.

[0012] In some embodiments, at least two limiting columns are provided. Thus, the limiting columns play a role in limiting the rotation of the displacement tube. If a single limiting column breaks and is damaged, it will cause the displacement tube and the control swivel tube to rotate synchronously, making the pressure guiding column unable to move; therefore, the setting of multiple limiting columns plays a dual - insurance role, and at the same time, the pressure received by each limiting column is more balanced.

[0013] In some embodiments, each of the position-limiting columns penetrates through the position-adjusting tube, and a receiving ring is fixedly connected to the ends of the position-limiting columns together. Thereby, the overall supporting strength of the position-limiting columns is improved, the stability of the displacement of the position-adjusting tube is ensured, and the displacement amount of the position-adjusting tube is also limited, avoiding the risk of damage to each structure.

[0014] In some embodiments, on the side of the end of the position-limiting slider facing the center of the control rotating tube and facing the pressure guiding column, there is an inclined surface. Thereby, due to the setting of the inclined surface, the end of the position-limiting slider is thinner, and it can penetrate into small gaps, thereby limiting the displacement of the pressure guiding column.

[0015] In some embodiments, a cover body that covers the lower end of the pressure guiding column is sleeved on the lower end of the control rotating tube. Thereby, the lower end surface of the pressure guiding column is prevented from contacting the external environment, and the direct impact of the external environment on the pressure guiding column is reduced.

[0016] It should be understood that the content described in the Summary of the Invention section is not intended to limit the key or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows the overall structural schematic diagram of a switch life test device for a valve electric drive device according to an embodiment of the present invention;

[0018] Figure 2 Shows a partial structural cross-sectional view of a switch life test device for a valve electric drive device;

[0019] Figure 3 Shows the connection structural schematic diagram of the pressure guiding column and the position-adjusting tube in a switch life test device for a valve electric drive device

[0020] Figure 4 Shows the structural schematic diagram of a position-limiting slider in a switch life test device for a valve electric drive device

[0021] Figure 5 Shows the structural schematic diagram of a guiding groove in a switch life test device for a valve electric drive device

[0022] Figure 6 Shows the schematic diagram of the installation state of the cover body in a switch life test device for a valve electric drive device.

[0023] SYMBOL DESCRIPTION

[0024] 1. Machine body; 11. Rotating drum; 12. Induction head; 13. Sensor; 14. Display screen; 15. Control button; 16. Actuator; 17. Extension plate; 171. Limit slide groove; 172. Guide groove; 18. Pressure sensor; 2. Pressure guide column; 21. Limit ring; 3. Control rotary tube; 31. Limit slide rod; 4. Adjusting tube; 41. Limit column; 42. Receiver ring; 5. Limit slide block; 51. Guide column; 6. Cover body. DETAILED DESCRIPTION

[0025] Hereinafter, preferred embodiments (or implementation modes) of the present invention will be described in detail with reference to the accompanying drawings.

[0026] Reference below Figures 1 - 6 A switch life test device for a valve electric drive device of the present invention is described.

[0027] Figure 1 The overall structure diagram of a valve electric drive device switch life test device according to an embodiment of the present invention is shown. Figure 1 As shown, a valve electric drive device switch life test device provided in this embodiment includes a body 1, an extension plate 17 is horizontally fixed to one side of the body 1, a pressure sensor 18 is arranged in the extension plate 17, a pressure guide column 2 is arranged below the pressure sensor 18 and is vertically slidably connected to the extension plate 17, and the upper end of the pressure guide column 2 abuts against the trigger end of the pressure sensor 18. A rotating drum 11 is arranged at the front end of the body 1, and the front end of the rotating drum 11 is open and is rotatably connected to the body 1 with its own center as the axis. A sensor head 12 is fixed to the inner wall of the rotating drum 11, and a fixed end fixedly connected to the body 1 is arranged on the bottom wall of the rotating drum 11, and a sensor 13 connected to the sensor 13 signal is fixed on the fixed end. A display screen 14, a control button 15, and an actuator 16 are also arranged at the front end of the body 1, and the display screen 14, the control button 15, the sensor 13 and the pressure sensor 18 are all electrically connected to the actuator 16 through wires. The sensor 13 is composed of a magnetoresistor, a signal processor and an oscillator structure, the induction head 12 rotates with the drum 11, and the pressure sensor 18 is composed of a thin sheet, a strain gauge and an elastic sensitive device, and the actuator 16 is composed of a single chip microcomputer, a reading device and a compilation chip structure.

[0028] When the life test device is applied, first place the body 1 at the designated position, and clamp the rotary drum 11 in the valve turntable of the valve electric drive device. Then connect the external power supply to the actuator 16. The user can operate the control button 15 to energize the sensor 13 and start the valve electric drive device at the same time, driving the valve to rotate. While the valve rotates, the turntable will follow the rotation, and the sensing head 12 will also rotate synchronously in the rotary drum 11. The sensor 13 senses the rotation speed of the sensing head 12, and transmits the data to the actuator 16 through the sensor 13. Then the actuator 16 obtains the data and presents it in digital form on the display screen 14.

[0029] After the user tests the rotation speed of the valve turntable of the valve electric drive device, the entire body 1 is repositioned, the pressure guide column 2 is clamped into the valve electric drive device, and then the valve electric drive device is started. When the valve electric drive device controls the drive device to open and close up and down, the pressure guide column 2 will be pressed by the drive device, and the top of the pressure guide column 2 presses on the pressure sensor 18. The pressure sensor 18 can test the pressure of the pressure guide column 2, thereby indirectly detecting the opening and closing pressure of the drive device. Again, the actuator 16 obtains the data and presents it in digital form on the display screen 14, thus realizing the detection operation of the relevant structural life of the valve electric drive device switch.

[0030] Since the pressure guide column 2 is exposed to the external environment, the displacement of the pressure guide column 2 is extremely likely to trigger the pressure sensor 18. Moreover, if the pressure guide column 2 is impacted or deformed greatly, it is extremely likely to cause damage to the pressure sensor 18, thus affecting the detection accuracy of the pressure sensor 18. Figure 2 Shows a partial structural cross-sectional view of a valve electric drive device switch life test device. Refer to Figure 2 As shown, a control rotating tube 3 is provided below the pressure sensor 18. The upper end surface of the control rotating tube 3 abuts against the lower surface of the extension plate 17, and the control rotating tube 3 is sleeved outside the pressure guide column 2 and is coaxially arranged with the pressure guide column 2. The control rotating tube 3 is also rotatably connected to the extension plate 17 with its own center as the axis.

[0031] At least three limiting slide bars 31 are provided on the circumferential side of the pressure guide column 2. The limiting slide bars 31 are evenly distributed around the pressure guide column 2 at intervals. The end of each limiting slide bar 31 is bent towards the extension plate 17 to form a limiting section. An annular limiting chute 171 is opened on the lower surface of the extension plate 17, and the limiting section of the limiting slide bar 31 is located in the limiting chute 171, thus realizing the coaxial rotation of the control rotating tube 3 and the pressure guide column 2.

[0032] An adjustment tube 4 is also coaxially arranged inside the control rotating tube 3. Internal threads are provided on the inner circumferential side of the control rotating tube 3, and external threads that are threadedly matched with the control rotating tube 3 are provided on the outer circumferential side of the adjustment tube 4, thus realizing the rotational connection between the control rotating tube 3 and the adjustment tube 4.

[0033] The displacement adjusting tube 4 plays a role in supporting and limiting the guiding pressure column 2 in the middle. Figure 3 The figure shows a schematic diagram of the connection structure between the guiding pressure column 2 and the displacement adjusting tube 4 in a switch life test device for a valve electric drive device. A circular limiting ring 21 is fixed on the circumferential side of the guiding pressure column 2. The limiting ring 21 is located at the upper end of the guiding pressure column 2. When the displacement adjusting tube 4 is sleeved outside the guiding pressure column 2, the lower surface of the limiting ring 21 supports on the upper surface of the displacement adjusting tube 4.

[0034] A limiting column 41 is further arranged on the lower surface of the extension plate 17. The limiting column 41 extends along the axial direction of the displacement adjusting tube 4. Its upper end is fixed on the lower surface of the extension plate 17, and the other end penetrates into the interior of the displacement adjusting tube 4. When the control rotating tube 3 is screwed, under the limitation of the limiting shaft, through the threaded connection between the displacement adjusting tube 4 and the control rotating tube 3, the displacement adjusting tube 4 is driven to displace in the direction away from the pressure sensor 18 along the direction of the limiting shaft, so that the upper end of the guiding pressure column 2 is separated from the contact with the triggering end of the pressure sensor 18, and when the guiding pressure column 2 is impacted, its upper end is not easily in contact with the pressure sensor 18.

[0035] In some embodiments, two limiting shafts are provided and are evenly distributed around the circumferential side of the guiding pressure column 2. Moreover, the lower ends of the limiting shafts penetrate through the lower end of the displacement adjusting tube 4, and an annular receiving ring 42 is arranged at the bottom. The receiving ring 42 is coaxially arranged with the displacement adjusting tube 4 and is fixedly connected to the lower ends of the two limiting shafts. On the one hand, the addition of multiple limiting shafts evenly distributes the rotational acting force of the displacement adjusting tube 4. On the other hand, the connection through the receiving tube increases the overall supporting strength of the limiting shafts, ensures the stability of the displacement of the displacement adjusting tube 4, and also plays a role in limiting the displacement of the displacement adjusting tube 4, ensuring the operation safety.

[0036] Figure 4 The figure shows a schematic diagram of the structure of the limiting slider 5 in a switch life test device for a valve electric drive device. Figure 5 The figure shows a schematic diagram of the structure of the guiding groove 172 in a switch life test device for a valve electric drive device. Refer to Figure 4 and Figure 5 As shown, a limiting slider 5 is penetrated through the upper end of the control rotating tube 3. The limiting slider 5 is arranged along the diameter direction of the end of the control rotating tube 3 and is slidably connected to the control rotating tube 3 along the diameter direction of the end of the control rotating tube 3. An obliquely arranged guiding groove 172 is formed in the circumferential side area of the lower surface of the extension plate 17 where the pressure sensor 18 is located. A plurality of the guiding grooves 172 are provided and are evenly distributed in a circle with the pressure sensor 18 as the center, so that the annular area formed by the plurality of guiding grooves 172 is coaxially arranged with the control rotating tube 3 and is located in the area opposite to the end of the control rotating tube 3; and a cylindrical guiding post 51 that can be received in the guiding groove 172 is convexly arranged on the upper surface of the limiting slider 5.

[0037] In the initial state, the upper end face of the pressure guiding column 2 abuts against the triggering end of the pressure sensor 18, while the end of the limiting slider 5 is located inside the control swivel tube 3. As the control swivel tube 3 rotates, it drives the position adjusting tube 4 to move downward, creating a gap between the upper end of the pressure guiding column 2 and the pressure sensor 18. During the rotation of the control swivel tube 3, it also drives the displacement of the limiting slider 5. Through the limiting cooperation between the guiding column 51 and the guiding groove 172, the end of the limiting slider 5 is driven to insert into the middle space of the control swivel tube 3 and is within the moving stroke of the pressure guiding column 2, avoiding the contact between the pressure guiding column 2 and the triggering end of the pressure sensor 18. During the rotation of the control swivel tube 3, its rotation stroke is limited, so that the rotation path of the limiting slider 5 will not interfere with the position of the limiting column 41.

[0038] In some embodiments, the positional relationship of the limiting slider 5 or the oblique angle of each line segment of the guiding groove 172 can be adjusted so that when the limiting slider 5 rotates to the limiting area, its side wall abuts against the circumferential side of the limiting column 41, thus not only limiting the sliding position of the limiting slider 5 but also restricting the rotation of the control swivel tube 3, improving the safety of the operation.

[0039] In some embodiments, the number of limiting sliders 5 can be set to two and arranged at intervals around the end face of the control swivel tube 3. Thus, when the pressure guiding column 2 slides, the contact area between the pressure guiding column 2 and the limiting sliders 5 is increased, improving the stability of the force on the pressure guiding column 2 and not easily causing damage to the structure of the pressure guiding column 2. Moreover, an inclined plane is provided at the end of each limiting slider 5 facing the center of the control swivel tube 3, and the inclined plane is located at the bottom of the limiting slider 5. While greatly reducing the end size of the limiting slider 5, it can adjust the initial position of the limiting slider 5, reduce the sliding amount of the limiting slider 5, and improve the driving efficiency of the limiting slider 5.

[0040] Figure 6 The figure shows a schematic diagram of the installation state of the cover body 6 in a switch life test device for a valve electric drive device. Refer to Figure 6 As shown, a cover body 6 is also inserted at the bottom of the control swivel tube 3, and the cover body 6 covers the outside of the pressure guiding column 2, thus restricting the direct contact between the pressure guiding column 2 and the external environment and indirectly protecting the pressure sensor 18.

[0041] In the description of this specification, terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A test device for the switching life of an electric drive device for a valve, characterized in that, include: Body (1), An extension plate (17), one end of which is fixed to the side wall of the machine body (1) and a pressure sensor (18) is arranged inside the extension plate; A pressure-guiding column (2) is arranged directly below the pressure sensor (18), and its upper end abuts against a trigger end of the pressure sensor (18); A control coil (3) is coaxially arranged with the pressure-guiding column (2), and is rotatably connected to the extension plate (17) around its own central axis, and has an internal thread on its inner circumference; A position adjustment tube (4) is coaxially located inside the control coil (3) and supports the pressure-guiding column (2), and its outer peripheral surface is provided with an external thread that matches the inner wall thread of the control coil (3); A limiting column (41) is arranged along the axial direction of the positioning tube (4), one end of which is fixedly connected to the lower surface of the extension plate (17), and the other end of which passes through the positioning tube (4) and is slidably connected to the positioning tube (4); A limit slider (5) is provided on the upper end surface of the control coil (3) and slides along the diameter direction of the cross section of the control coil (3) toward the center direction of the control coil (3); A driving structure is provided between the limit slider (5) and the extension plate (17) to drive the limit slider (5) to slide back and forth toward the center of the control coil (3); An obliquely arranged guide groove (172) is coaxially provided on the lower surface of the extension plate (17) and in an area opposite to the upper end surface of the control coil (3); a plurality of guide grooves (172) are arranged and are evenly distributed around the circumference of the pressure sensor (18); The limiting sliding block (5) is provided with a guide column (51) protruding from the side wall of the extending plate (17) and located in the guide groove (172).

2. The switch life test device for a valve electric drive device according to claim 1, characterized in that, Also includes: The limiting sliding groove (171) is arranged in an annular shape and is opened on the outer peripheral side of the extension plate (17) located at the guide groove (172). At least two limiting slide bars (31) are provided and are arranged on the outer peripheral side of the control coil (3), and are located in the limiting slide groove (171) and are slidably connected to the inner wall of the limiting slide groove (171).

3. A valve electric drive device switch life test device according to claim 1, characterized in that: A limiting ring (21) is fixedly connected to the outer peripheral side of the pressure-guiding column (2), and the limiting ring (21) is supported on the upper end surface of the position-adjusting tube (4).

4. A valve electric drive device switch life test device according to claim 1, characterized in that: At least two limit sliding blocks (5) are provided.

5. A valve electric drive device switch life test device according to claim 1, characterized in that: At least two limiting columns (41) are provided.

6. A valve electric drive device switch life test device according to claim 5, characterized in that: Each of the limiting columns (41) penetrates the position adjusting tube (4), and a receiving ring (42) is fixedly connected to the ends of the limiting columns (41).

7. A valve electric drive device switch life test device according to claim 1, characterized in that: One end of the limiting slider (5) facing the center of the control swivel tube (3) is provided with an inclined cutting surface on one side facing the pressure guiding column (2).

8. A switching life test device for a valve electric drive device according to claim 1, characterized in that, A cover body (6) that covers the lower end of the pressure guiding column (2) is sleeved on the lower end of the control swivel tube (3).

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