Valve electric driving device switch life test device

Abstract

The invention provides a valve electric driving device switch life test device, which comprises a machine body, an extension plate, a pressure sensor, a pressure guide column arranged right below the pressure sensor, and an upper end of the pressure guide column abuts against the pressure sensor; the control rotary pipe is coaxially arranged with the pressure guide column and rotationally connected with the extension plate, and an internal thread is formed in the inner peripheral side of the control rotary pipe; the position adjusting pipe is coaxially located in the control rotating pipe and supports the pressure guiding column, and external threads are formed in the peripheral face of the position adjusting pipe; the limiting column is axially arranged along the position adjusting pipe, one end of the limiting column is fixedly connected to the lower surface of the extension plate, and the other end of the limiting column penetrates through the position adjusting pipe and is slidably connected with the position adjusting pipe; the limiting sliding block is arranged on the upper end face of the control rotating pipe in a penetrating mode and slides towards the center of the control rotating pipe in the diameter direction of the section of the control rotating pipe; and a driving structure for driving the limiting slide block to slide back and forth towards the center direction of the control coil pipe is arranged between the limiting slide block and the extension plate. According to the technical scheme, the guide column is far away from the pressure sensor in a displacement limiting mode, and damage to the pressure sensor is avoided.

Description

Technical Field

[0001] The present invention generally relates to the field of test devices, and particularly to a switch life test device for a valve electric drive 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 the 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 a valve electric drive device" disclosed in the application number 201921925994.2. In this switch life test device for a valve electric drive 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. Springs II are arranged on the left and right sides of the top end of the middle plate. Magnets are fixedly connected to the upper and lower ends of the springs II, and the outer sides of the magnets 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 this 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 a valve electric drive device is provided, including: a body, an extension plate, one end of which is fixed to the side wall of the 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 rotationally connected with the extension plate around a 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 limit slider moves toward 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, an obliquely arranged guiding groove is coaxially formed in the region of the lower surface of the extension plate opposite to the upper end surface of the control swivel tube, and a plurality of the guiding grooves are provided and evenly distributed around the circumference of the pressure sensor; The limit slider is convexly provided with a guiding column located in the guiding groove on the side wall fitting with the extension plate. Thus, during the rotation of the control swivel tube, the limit slider is driven to move, and through the guiding cooperation between the guiding groove and the guiding column, the limit slider is driven to move toward the center direction of the control swivel tube, so that the end of the limit slider is located on the stroke of the pressure guiding column, restricting the contact between the cross section of the pressure guiding column and the pressure sensor.

[0008] In some embodiments, it further includes: a limit 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, and at least two limit sliding rods, which are arranged on the outer peripheral side of the control swivel tube and are located in the limit sliding groove and are slidably connected with the inner wall of the limit sliding groove. Thus, through the sliding of a plurality of limit sliding rods in the limit 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 limit slider.

[0009] In some embodiments, a limit ring is fixedly connected to the outer peripheral side of the pressure guiding column, and the limit ring supports on the upper end surface of the displacement tube. Thus, the limit 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.

[0010] In some embodiments, at least two limit sliders are provided. Thus, by providing a plurality of limit sliders, the contact area between the pressure guiding column and the limit slider 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.

[0011] In some embodiments, at least two limit columns are provided. Thus, the limit columns play a role in limiting the rotation of the displacement tube. If a single limit column is broken or damaged, the displacement tube and the control swivel tube will rotate synchronously, making the pressure guiding column unable to move; therefore, the provision of a plurality of limit columns plays a double insurance role, and at the same time, the pressure received by each limit column is more balanced.

[0012] 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. Thus, the overall support 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.

[0013] In some embodiments, on the side of the end of the position-limiting slider facing the center of the control rotary tube and towards the pressure guiding column, an inclined plane is provided. Thus, due to the setting of the inclined plane, the end of the position-limiting slider is made thinner, enabling it to penetrate into small gaps, thereby limiting the displacement of the pressure guiding column.

[0014] 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 rotary tube. Thus, the lower end surface of the pressure guiding column is prevented from coming into contact with the external environment, reducing the direct impact of the external environment on the pressure guiding column.

[0015] It should be understood that the content described in the summary of the invention is not intended to define 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 readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Shows an overall structural schematic diagram of a switch life test device for a valve electric drive device according to an embodiment of the present invention; Figure 2 Shows a partial structural cross-sectional view of a switch life test device for a valve electric drive device; Figure 3 Shows a schematic diagram of the connection structure between a pressure guiding column and a position-adjusting tube in a switch life test device for a valve electric drive device Figure 4 Shows a schematic diagram of the structure embodying a position-limiting slider in a switch life test device for a valve electric drive device Figure 5 Shows a schematic diagram of the structure of a guiding groove in a switch life test device for a valve electric drive device Figure 6 Shows a schematic diagram of the installation state of a cover body in a switch life test device for a valve electric drive device.

[0017] SYMBOL DESCRIPTION 1. Machine body; 11. Rotary drum; 12. Induction head; 13. Sensor; 14. Display screen; 15. Control button; 16. Actuator; 17. Extension plate; 171. Position-limiting sliding groove; 172. Guiding groove; 18. Pressure sensor; 2. Pressure guiding column; 21. Position-limiting ring; 3. Control rotary tube; 31. Position-limiting sliding rod; 4. Position-adjusting tube; 41. Position-limiting column; 42. Receiving ring; 5. Position-limiting slider; 51. Guiding column; 6. Cover body. Detailed implementation manners

[0018] Next, with reference to the accompanying drawings, the preferred embodiments (or implementation manners) of the present invention will be described in detail.

[0019] Next, refer to Figures 1 - 6 to describe a switch life test device for a valve electric drive device of the present invention.

[0020] Figure 1 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 is shown. Refer to Figure 1 As shown, a switch life test device for a valve electric drive device provided in this embodiment includes a machine body 1. A horizontal extension plate 17 is fixedly connected to one side of the machine body 1. A pressure sensor 18 is arranged inside the extension plate 17. Below the pressure sensor 18, a pressure guiding column 2 slidably connected to the extension plate 17 in the vertical direction is arranged. The upper end of the pressure guiding column 2 abuts against the trigger end of the pressure sensor 18. A rotating cylinder 11 is arranged at the front end of the machine body 1. The front end of the rotating cylinder 11 is open and is rotatably connected to the machine body 1 with its own center as the axis. Induction heads 12 are fixed on the circumferential side of the inner wall of the rotating cylinder 11. A fixed end fixedly connected to the machine body 1 is arranged on the bottom wall of the rotating cylinder 11. A sensor 13 signal-connected to the sensor 13 is fixed on the fixed end. A display screen 14, control buttons 15, and an actuator 16 are also arranged at the front end of the machine body 1. The display screen 14, control buttons 15, sensor 13, and pressure sensor 18 are all electrically connected to the actuator 16 through wires. The sensor 13 is composed of a magnetoresistive resistor, a signal processor, and an oscillator structure. The induction heads 12 rotate following the rotation of the rotating cylinder 11. The pressure sensor 18 is composed of a thin sheet, a strain gauge, and an elastic sensitive device. The actuator 16 is composed of a single-chip microcomputer, a reading device, and a compilation chip structure.

[0021] When the life test device is applied, first place the machine body 1 at a specified position, and clamp the rotating cylinder 11 in the valve turntable of the valve electric drive device. Then connect an external power supply to the actuator 16. The user can operate the control buttons 15 to energize the sensor 13. At the same time, start the valve electric drive device to drive the valve to rotate. When the valve rotates, the turntable will rotate accordingly, and the induction heads 12 will also rotate synchronously inside the rotating cylinder 11. The sensor 13 senses the rotation speed of the induction heads 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.

[0022] After the user tests the rotation speed of the valve turntable of the valve electric drive device, the whole body 1 is swapped in position, the pressure guide column 2 is snapped into the valve electric drive device, and then the valve electric drive device is started. When the drive device of the valve electric drive device controls the up and down opening and closing, 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, so as to indirectly detect the opening and closing pressure of the drive device. Again, data is obtained through the actuator 16 and presented 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.

[0023] 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 in a valve electric drive device switch life test device, refer to Figure 2 As shown, a control swivel tube 3 is arranged below the pressure sensor 18. The upper end face of the control swivel tube 3 abuts against the lower surface of the extension plate 17, and the control swivel tube 3 is sleeved outside the pressure guide column 2 and is coaxially arranged with the pressure guide column 2. The control swivel tube 3 is also rotationally connected to the extension plate 17 with its own center as the axis.

[0024] At least three limiting slide bars 31 are arranged on the peripheral 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 swivel tube 3 and the pressure guide column 2.

[0025] An adjusting tube 4 is also coaxially arranged inside the control swivel tube 3. Internal threads are provided on the inner peripheral side of the control swivel tube 3, and external threads that are threadedly matched with the control swivel tube 3 are provided on the outer peripheral side of the adjusting tube 4, thus realizing the rotational connection between the control swivel tube 3 and the adjusting tube 4.

[0026] The adjusting tube 4 plays a role in supporting and limiting the pressure guide column 2 in the middle. Figure 3 Shows a schematic diagram of the connection structure between the pressure guide column 2 and the adjusting tube 4 in a valve electric drive device switch life test device. A circular limiting ring 21 is fixed on the peripheral side of the pressure guide column 2. The limiting ring 21 is located at the upper end of the pressure guide column 2. When the adjusting tube 4 is sleeved outside the pressure guide column 2, the lower surface of the limiting ring 21 supports on the upper surface of the adjusting tube 4.

[0027] The lower surface of the extension plate 17 is further provided with a limit post 41. The limit post 41 extends along the axial direction of the adjustment tube 4. Its upper end is fixed to the lower surface of the extension plate 17, and the other end passes through the inside of the adjustment tube 4. When the control screw tube 3 is screwed, under the restriction of the limit shaft, through the threaded connection between the adjustment tube 4 and the control screw tube 3, the adjustment tube 4 is driven to displace along the direction of the limit shaft away from the pressure sensor 18, so that the upper end of the pressure guiding post 2 is disengaged from the contact with the triggering end of the pressure sensor 18, and when the pressure guiding post 2 is impacted, its upper end is not easily in contact with the pressure sensor 18.

[0028] In some embodiments, there are two limit shafts, which are evenly distributed around the circumference of the pressure guiding post 2. Moreover, the lower ends of the limit shafts penetrate the lower end of the adjustment tube 4, and an annular receiving ring 42 is provided at the bottom. The receiving ring 42 is coaxially arranged with the adjustment tube 4 and is fixedly connected to the lower ends of the two limit shafts. On the one hand, the addition of multiple limit shafts evenly distributes the rotational acting force of the adjustment tube 4. On the other hand, the connection through the receiving tube increases the overall support strength of the limit shafts, ensures the stability of the displacement of the adjustment tube 4, and also plays a limiting role in the displacement of the adjustment tube 4, ensuring the operation safety.

[0029] Figure 4 The structural schematic diagram showing the limit slider 5 in a valve electric drive device switch life test device is shown. Figure 5 The structural schematic diagram showing the guide groove 172 in a valve electric drive device switch life test device is shown. Refer to Figure 4 and Figure 5 As shown, a limit slider 5 is sleeved on the upper end of the control screw tube 3. The limit slider 5 is arranged along the diameter direction of the end of the control screw tube 3 and is slidably connected to the control screw tube 3 along the diameter direction of the end of the control screw tube 3. An obliquely arranged guide 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 guide 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 guide grooves 172 is coaxially arranged with the control screw tube 3 and is located in the area opposite to the end of the control screw tube 3; and a cylindrical guide post 51 that can be received in the guide groove 172 is convexly provided on the upper surface of the limit slider 5.

[0030] 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 displacement 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 located 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.

[0031] 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. This not only limits the sliding position of the limiting slider 5 but also restricts the rotation of the control swivel tube 3, improving the safety of the operation.

[0032] 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 making it less likely to cause damage to the structure of the pressure guiding column 2. Moreover, an inclined cutting surface is provided at the end of each limiting slider 5 facing the center of the control swivel tube 3, and the inclined cutting surface 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.

[0033] 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, thereby restricting the direct contact between the pressure guiding column 2 and the external environment and indirectly protecting the pressure sensor 18.

[0034] In the description of this specification, terms such as "connection", "installation", and "fixation" 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.

[0035] 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 modifications and changes 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 valve electric drive device switch life test device, 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 rotary tube and slides along the cross-sectional diameter direction of the control rotary tube (3) toward the center direction of the control rotary tube (3); A driving structure is provided between the limit slider (5) and the extension plate (17) for driving the limit slider (5) to slide back and forth toward the center of the control coil (3).

2. A valve electric drive device switch life test device according to claim 1, characterized in that: Said An obliquely arranged guide groove (172) is coaxially provided in an area opposite to the upper end surface of the control coil (3) on the lower surface of the extension plate (17), and a plurality of guide grooves (172) are arranged and 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).

3. A valve electric drive device switch life test 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).

4. 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).

5. A valve electric drive device switch life test device according to claim 2, characterized in that: At least two limit sliding blocks (5) are provided.

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

7. A valve electric drive device switch life test device according to claim 6, 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).

8. A valve electric drive device switch life test device according to claim 1, characterized in that: The end of the limiting slider (5) facing the center of the control coil (3) is provided with a chamfered surface on one side facing the pressure guide column (2).

9. A valve electric drive device switch life test device according to claim 1, characterized in that: The lower end of the control coil (3) is sleeved with a cover body (6) which covers the lower end of the pressure-guiding column (2).

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