Simple valve opening position detection device

Abstract

The utility model discloses a simple valve opening position detection device, and belongs to the technical field of valve detection. The simple valve opening position detection device comprises a valve main body used for controlling pipeline circulation and a mounting bracket arranged on the valve main body, a pointer dial plate is arranged at the top end of the valve body. According to the simple valve opening position detection device, the firing pin is fixed to the center of the rotating shaft of the pointer on the pointer dial plate, the firing pin can achieve synchronous rotation of the pointer and the firing pin through the rotating pointer of the pointer dial plate, and a roller type limiting switch on the installation support is matched; the connecting block pushes the rotating wheel to move, the rolling wheel type limiting switch can send out a signal after sensing rotation of the rotating rod, detection of an opening signal is achieved, an original valve body can be modified, and the device has the advantages of being simple in structure, low in cost, convenient to maintain and free of disassembly and reassembly.

Description

Technical Field

[0001] The utility model relates to the technical field of valve detection, in particular to a simple valve opening position detection device. Background Art

[0002] Valves are pipe accessories used to open and close pipelines, control flow direction, and regulate and control the parameters (temperature, pressure, and flow) of the conveyed medium. They have functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, flow diversion, or overflow pressure relief. Valves used in fluid control systems come in a wide variety of types and specifications, from the simplest shut-off valve to the most complex valves used in automatic control systems.

[0003] For example, Chinese patent publication number CN201589004U describes a valve position detection device, comprising a hydraulic lubrication pipeline, a valve positioner, a manual valve, and a proximity switch. The manual valve is secured to the pipeline using the positioner, and the proximity switch is mounted on the positioner. Advantages include: effectively limiting valve opening; preventing human error in valve operation; and preventing valve vibration from causing loss of proximity switch signals for valve position detection, which could trip hydraulic and lubrication system pump stations and cause emergency shutdowns of regional equipment. This device completely eliminates the problems of pipeline valve opening errors and false signals from valve position detection proximity switches, ensuring stable equipment operation.

[0004] A disc valve on an existing 5-meter hydraulic pipeline does not have a limit detection device. As a result, when the valve is opened, the automatic control system cannot collect the valve opening signal, making it impossible for remote operators to understand the valve status in real time. Once the valve opening and closing status does not meet the working conditions, it will cause damage to the pump group, pipeline, and even the terminal actuator, which is likely to cause safety hazards in normal production and subsequent maintenance. Moreover, since this disc valve has its own switch, when using the above method, the switch also needs to be disassembled and replaced, which is more troublesome and costly to replace. Utility Model Content

[0005] In response to the above problems in the prior art, the present invention provides a simple valve opening detection device which has the technical effect of not requiring the replacement of a switch and is simple and does not require high costs.

[0006] In order to solve the above technical problems and achieve the above technical effects, the present invention is implemented through the following technical solutions:

[0007] The technical solution of the present utility model is: a simple valve opening detection device, comprising a valve body for controlling pipeline circulation and a mounting bracket arranged on the valve body; a pointer dial is provided on the top of the valve body, a striker that can rotate with the pointer is provided on the pointer dial, and a roller limit switch that can detect the switching state of the valve body is fixedly installed on the front of the mounting bracket, and the roller limit switch is connected to the signal of the automatic control system; when the valve body is in a closed state, the striker does not apply force to the roller limit switch under the drive of the pointer of the pointer dial, and the roller limit switch is in an untriggered state; when the valve body is in an open state, the striker applies force to the roller limit switch under the drive of the pointer of the pointer dial, and the roller limit switch is in a triggered state.

[0008] Furthermore, the pointer of the pointer dial and the striker are both arranged on the pointer shaft of the pointer dial, the striker is located above the pointer, and the striker and the pointer point in the same direction.

[0009] Furthermore, the firing pin is a Z-shaped structure, and is composed of an upper horizontal portion located on the outside, a vertical portion located in the middle, and a lower horizontal portion located on the inside.

[0010] Furthermore, the roller limit switch includes a rotating rod and a rotating plate, the rotating rod is rotatably arranged on the roller limit switch, and the roller limit switch is provided with a contact adapted to the rotating rod, the rotating plate is detachably arranged vertically on the surface of the rotating rod, the top of the rotating plate is provided with a rotating wheel capable of contacting the striker, and the surface of the rotating rod is provided with a reset torsion spring capable of restoring the position of the rotating plate.

[0011] Furthermore, the outer end of the striker is provided with a push block through a connecting block for increasing the contact area with the rotating wheel of the roller limit switch, and one side of the push block is provided with an arc groove adapted to the curvature of the rotating wheel surface.

[0012] Furthermore, one end of the reset torsion spring is fixedly mounted on the surface of the mounting bracket, and a reset plate in contact with the other end of the reset torsion spring is fixedly mounted on the back of the rotating plate.

[0013] Furthermore, an adjustment slot adapted to the rotating rod is provided inside the rotating plate, and a fixing seat is provided on the surface of the rotating rod and located between the rotating plate and the return torsion spring.

[0014] Furthermore, a thread is provided on the surface of the rotating rod, a nut is threadedly connected to the front end of the rotating rod, the nut and the fixing seat form a fixing assembly, and the rotating plate is installed on the rotating rod through the fixing assembly.

[0015] Furthermore, the valve body is a rotary disc valve, and a rotary disc capable of controlling the valve body to open or close is provided on one side of the valve body.

[0016] The beneficial technical effect of the present invention is that: by installing a striker on the pointer shaft of the pointer dial, there is no need to disassemble the switch on the original valve body, and the striker is fixed to the center of the rotating shaft of the pointer on the pointer dial. The striker can use the rotating pointer of the pointer dial itself to realize the synchronous rotation of the pointer and the striker, and, in conjunction with the roller limit switch on the mounting bracket, when the striker rotates to the specified position with the pointer, the connecting block pushes the rotating wheel to move, so that the rotating wheel drives the rotating rod to rotate through the rotating plate, and the roller limit switch can send a signal after sensing the rotation of the rotating rod, thereby realizing the detection of the open position signal. The device can be used to modify the original valve body, has a simple structure, low cost, and is easy to maintain without the need for disassembly and reinstallation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic front view cross-sectional diagram of the structure of the present utility model;

[0018] Figure 2 It is a front cross-sectional schematic diagram of the structure of the reset plate and the rotating rod of the utility model;

[0019] Figure 3 It is a schematic top view cross-sectional diagram of the structure of the firing pin and the mounting bracket of the utility model;

[0020] Figure 4 This utility model Figure 3 A schematic diagram of the structure at center A;

[0021] Figure 5 This is a side view of the structure of the valve body and the mounting bracket of the utility model;

[0022] Figure 6 This is a schematic side cross-sectional view of the structure of the adjustment slot and the fixing seat of the utility model;

[0023] Figure 7 It is a schematic top view of the structure of the present invention.

[0024] The numbers and letters in the figure represent the corresponding component names:

[0025] 1. Mounting bracket; 2. Valve body; 21. Pointer dial; 22. Pointer; 3. Pipe; 4. Strike pin; 5. Connecting block; 51. Push block; 6. Roller limit switch; 7. Rotating plate; 71. Reset plate; 72. Adjustment slot; 8. Rotating wheel; 9. Rotating rod; 91. Reset torsion spring; 92. Fixing seat; 93. Nut. DETAILED DESCRIPTION

[0026] In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0027] See attached Figure 1-7 As shown, a simple valve opening detection device of the first embodiment includes a valve body 2 for controlling the flow of a pipeline 3 and a mounting bracket 1 provided on the valve body 2 .

[0028] A pointer dial 21 is provided at the top of the valve body 2, and a striker 4 that can rotate with the pointer 22 is provided on the pointer dial 21. A roller limit switch 6 that can detect the switching state of the valve body 2 is fixedly installed on the front of the mounting bracket 1. The roller limit switch 6 is connected to the automatic control system signal.

[0029] One side of the roller limit switch 6 is connected to an external cable, and the limit signal is connected to the automatic control system through the cable. A corresponding display icon is added to the external HMI to achieve real-time monitoring of the open position.

[0030] When the valve body 2 is in the closed state, the striker 4 does not apply force to the roller limit switch 6 under the drive of the pointer 22 of the pointer dial 21, and the roller limit switch 6 is in an untriggered state; when the valve body 2 is in the open state, the striker 4 applies force to the roller limit switch 6 under the drive of the pointer 22 of the pointer dial 21, and the roller limit switch 6 is in a triggered state.

[0031] The pointer 22 of the pointer dial 21 and the striker 4 are both arranged on the pointer shaft of the pointer dial 21 . The striker 4 is located above the pointer 22 , and the striker 4 and the pointer 22 point in the same direction.

[0032] The striker 4 points in the same direction as the pointer 22 , so that when the pointer 22 moves, the striker 4 moves synchronously.

[0033] Select an appropriate position on the valve body 2, install a mounting bracket 1, and fix the roller limit switch 6 on the mounting bracket 1. When the valve body 2 is opened, the pointer dial 21 causes the pointer shaft to drive the pointer 22 to rotate due to the change in pressure or flow in the pipeline 3. The rotating pointer shaft drives the paddle assembly to hit the rotating wheel 8 on the roller limit switch 6. When the rotating rod 9 rotates, the detector rotating rod 9 in the roller limit switch 6 is sensed to realize the detection of the opening signal.

[0034] The striker 4 has a Z-shaped structure, which consists of an upper horizontal part located on the outside, a vertical part located in the middle, and a lower horizontal part located on the inside. The bending part on the Z-shape of the striker 4 can just adapt to the height of the pointer dial 21 and the roller limit switch 6, so that when the pointer 22 drives the striker 4 to move, it will not be affected by the shape of the pointer dial 21 and the roller limit switch 6.

[0035] The roller limit switch 6 includes a rotating rod 9 and a rotating plate 7. The rotating rod 9 is rotatably arranged on the roller limit switch 6, and a contact adapted to the rotating rod 9 is arranged inside the roller limit switch 6. The rotating plate 7 is detachably arranged vertically on the surface of the rotating rod 9, and a rotating wheel 8 capable of contacting the striker 4 is arranged on the top of the rotating plate 7.

[0036] There are two contacts, namely normally closed contacts and normally open contacts, which are converted into switching outputs through the movement of the rotating rod 9. When the valve body 2 is in the open state, the pointer dial 21 can detect the flow or pressure inside the pipeline 3, so that the pointer 22 on the pointer dial 21 rotates. While displaying the actual value, the pointer 22 will drive the striker 4 to move, so that the striker 4 moves in contact with the rotating wheel 8, thereby rotating the rotating rod 9. When the rotating rod 9 contacts the normally closed contact and the normally open contact respectively, the roller limit switch 6 will send different signals for the staff to observe.

[0037] The surface of the rotating rod 9 is provided with a reset torsion spring 91 that can restore the position of the rotating plate 7. One end of the reset torsion spring 91 is fixedly installed on the surface of the mounting bracket 1, and the back of the rotating plate 7 is fixedly installed with a reset plate 71 that contacts the other end of the reset torsion spring 91. The surface of the rotating rod 9 is provided with a thread, and the front end of the rotating rod 9 is threadedly connected to a nut 93. The nut 93 and the fixing seat 92 constitute a fixing assembly, and the rotating plate 7 is installed on the rotating rod 9 through the fixing assembly.

[0038] By setting a reset torsion spring 91, when the striker 4 drives the connecting block 5 to release the contact with the rotating wheel 8, the reset torsion spring 91 can release the elastic force and push the rotating plate 7 to reset through the reset plate 71. By setting a nut 93 and a fixing seat 92, when the rotating plate 7 is installed, the rotating plate 7 can adjust the height of the rotating wheel 8 through the adjustment slot 72. After determining the height, the nut 93 is fixed to the rotating rod 9 through a thread, and the rotating plate 7 is fixed with the fixing seat 92.

[0039] The outer end of the striker 4 is provided with a push block 51 through the connecting block 5 for increasing the contact area with the rotating wheel 8 of the roller limit switch 6, and an arc groove is opened on one side of the push block 51 to match the curvature of the surface of the rotating wheel 8.

[0040] By setting an arc groove, when the pointer shaft drives the striker 4 to move, the striker 4 drives the push block 51 to fit onto the surface of the rotating wheel 8 through the connecting block 5, and the Z-shaped setting of the striker 4 makes one end of the striker 4 higher than the height of the mounting bracket 1. When the striker 4 rotates, the striker 4 can drive the connecting block 5 to push the rotating wheel 8 to move, so that the rotating plate 7 rotates with the rotating rod 9 as the center.

[0041] The valve body 2 is a rotary disc valve, and a rotary disc capable of controlling the valve body 2 to open or close is provided on one side of the valve body 2 .

[0042] When the device is working, when the liquid enters the valve body 2 through the pipe 3 and flows, the pointer dial 21 on the valve body 2 can rotate and display according to the pressure. At the same time, the pointer dial 21 is driven to rotate by the pointer 22, so that the striker 4 moves synchronously with the pointer 22 as the center, so that the striker 4 pushes the rotating wheel 8 to move through the connecting block 5, so that the rotating plate 7 drives the rotating rod 9 to rotate with the rotating rod 9 as the center, and then the contacts on the roller limit switch 6 generate induction, and transmit the signal to the automatic control system while sensing the switch state, and add the corresponding display icon on the external HMI, so as to realize the real-time monitoring function of the open position without the need to disassemble and replace the original valve body 2. The structure is simple and the cost is low.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A simple valve opening detection device, characterized in that: include: A valve body (2) for controlling the flow of a pipeline (3) and a mounting bracket (1) provided on the valve body (2); The top of the valve body (2) is provided with a pointer dial (21), and the pointer dial (21) is provided with a striker (4) that can rotate with the pointer (22). The front of the mounting bracket (1) is fixedly mounted with a roller limit switch (6) that can detect the switch state of the valve body (2), and the roller limit switch (6) is connected to the automatic control system signal. When the valve body (2) is in a closed state, the striker (4) does not apply force to the roller limit switch (6) under the drive of the pointer of the pointer dial (21), and the roller limit switch (6) is in an untriggered state; when the valve body (2) is in an open state, the striker (4) applies force to the roller limit switch (6) under the drive of the pointer of the pointer dial (21), and the roller limit switch (6) is in a triggered state.

2. The simple valve opening position detection device according to claim 1, characterized in that: The pointer (22) of the pointer dial (21) and the striker (4) are both arranged on the pointer shaft of the pointer dial (21), the striker (4) is located above the pointer (22), and the striker (4) and the pointer (22) point in the same direction.

3. The simple valve opening detection device according to claim 1, characterized in that: The striker (4) has a Z-shaped structure, and is composed of an upper horizontal portion located on the outside, a vertical portion located in the middle, and a lower horizontal portion located on the inside.

4. The simple valve opening position detection device according to claim 1, characterized in that: The roller limit switch (6) includes a rotating rod (9) and a rotating plate (7), wherein the rotating rod (9) is rotatably arranged on the roller limit switch (6), and a contact adapted to the rotating rod (9) is arranged inside the roller limit switch (6), the rotating plate (7) is detachably arranged vertically on the surface of the rotating rod (9), the top of the rotating plate (7) is provided with a rotating wheel (8) capable of contacting the striker (4), and the surface of the rotating rod (9) is provided with a reset torsion spring (91) capable of restoring the position of the rotating plate (7).

5. The simple valve opening position detection device according to claim 4, characterized in that: The outer end of the striker (4) is provided with a push block (51) for increasing the contact area with the rotating wheel (8) of the roller-type limit switch (6) through a connecting block (5), and an arc groove adapted to the surface curvature of the rotating wheel (8) is opened on one side of the push block (51).

6. The simple valve opening position detection device according to claim 4, characterized in that: One end of the return torsion spring (91) is fixedly mounted on the surface of the mounting bracket (1), and a return plate (71) in contact with the other end of the return torsion spring (91) is fixedly mounted on the back of the rotating plate (7).

7. The simple valve opening position detection device according to claim 6, characterized in that: An adjusting slot (72) adapted to the rotating rod (9) is provided inside the rotating plate (7), and a fixing seat (92) is provided on the surface of the rotating rod (9) and located between the rotating plate (7) and the return torsion spring (91).

8. The simple valve opening position detection device according to claim 7, characterized in that: The surface of the rotating rod (9) is provided with a thread, and the front end of the rotating rod (9) is threadedly connected to a nut (93), the nut (93) and the fixing seat (92) form a fixing assembly, and the rotating plate (7) is mounted on the rotating rod (9) through the fixing assembly.

9. The simple valve opening position detection device according to claim 1, characterized in that: The valve body (2) is a rotary disc valve, and a rotary disc capable of controlling the valve body (2) to open or close is provided on one side of the valve body (2).

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