Electric butterfly valve capable of overload protection

Abstract

The utility model discloses an electric butterfly valve capable of overload protection, which effectively achieves the effect of prolonging the service life of the device, and comprises a valve body, the middle part of the valve body is rotatably connected with a valve shaft, the lower part of the valve shaft is fixedly connected with a valve plate, and the upper side of the valve body is fixedly connected with a control box. A control box is arranged in the valve shaft, a rotatable power gear is arranged in the control box, an overload protection mechanism is arranged between the power gear and the valve shaft, a detection mechanism used for detecting the rotating position of the valve shaft is arranged in the control box, a circuit board is arranged in the control box, and supporting blocks are arranged on the front side and the rear side of the circuit board. The device is simple in structure, ingenious in conception and easy and convenient to operate, workers can effectively and conveniently install the device, the better overload protection effect is achieved, assembly and installation are facilitated, the function of detecting the rotating position of the valve plate is added, and the probability that a circuit board is damaged in the using process is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of electric butterfly valve technology, and relates to an electric butterfly valve with overload protection. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. A butterfly valve is characterized by a disc-shaped closing element (valve disc or butterfly plate) that rotates around a valve shaft to open and close. It can control the flow of various types of fluids, including air, water, steam, various corrosive media, slurry, oil, liquid metals, and radioactive media. In pipelines, it primarily functions as a shut-off and throttling device. The butterfly valve's opening and closing element is a disc-shaped butterfly plate that rotates around its own axis within the valve body to achieve opening, closing, or regulation. In the use of existing electric butterfly valves, which are powered by electricity, the valve lacks overload protection. Under excessive force, the valve disc is easily damaged, reducing the valve's service life. Utility Model Content

[0003] To address the aforementioned problems, this utility model proposes an electric butterfly valve with overload protection, which effectively solves the problems in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] An overload-protected electric butterfly valve includes a valve body, a valve shaft rotatably connected to the middle of the valve body, a valve plate fixedly connected to the lower part of the valve shaft, a control box fixedly connected to the upper side of the valve body, a rotatable power gear inside the control box, an overload protection mechanism between the power gear and the valve shaft, a detection mechanism for detecting the rotational position of the valve shaft inside the control box, a circuit board inside the control box, and support blocks fixedly connected to the control box on both the front and rear sides of the circuit board.

[0006] Preferably, a partition plate is fixedly connected inside the control box, dividing the interior of the control box into a control chamber and a power chamber. The support block is fixedly connected to the side wall of the control chamber, and the power gear is rotatably connected to the power chamber.

[0007] Preferably, a motor is fixedly connected inside the power chamber, and a connecting gear is fixedly connected to the upper side of the motor, with the front side of the connecting gear meshing with the power gear.

[0008] Preferably, the overload protection mechanism includes a torque sensor and an electromagnetic clutch. The torque sensor is fixedly connected to the lower side of the power gear, the detection end of the torque sensor is connected to the valve shaft, the rotation end of the electromagnetic clutch is fixedly connected to the middle of the valve shaft, and the fixed end of the electromagnetic clutch is fixedly connected to the control box.

[0009] Preferably, the detection end of the torque sensor is fixedly connected to a connector, and a connecting groove adapted to the connector is provided on the upper side of the valve shaft.

[0010] Preferably, the detection mechanism includes a moving rod, a fixed rod, and a pressure sensor. The moving rod is fixedly connected to the outside of the valve shaft, the fixed rod is fixedly connected to the inner bottom wall of the control box, and the pressure sensor is disposed on the side of the fixed rod near the moving rod.

[0011] Preferably, the side of each support block closest to the circuit board is arc-shaped.

[0012] Preferably, the inner bottom wall of the control room is fixedly connected with a plurality of first support columns, and the circuit board is provided with a fixing groove corresponding to the first support columns one by one. Each first support column is threaded with a T-shaped block on its upper side, and a buffer ring is provided between each T-shaped block and the first support column. The bottom of each buffer ring abuts against the upper side of the circuit board.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model has an overload protection mechanism. During the power transmission process, the overload protection mechanism will detect the torque delivered to the valve shaft by the power gear in real time. When the valve shaft drives the valve plate to rotate and jamming occurs, the overload protection mechanism can detect the increase in the torque output by the power gear to the valve shaft. At this time, the power gear can be stopped from rotating, thereby reducing the probability of the valve plate being damaged due to overload caused by the power gear driving the valve plate through the valve shaft.

[0015] 2. This utility model has a detection mechanism that can detect the rotation position of the valve plate when there is no jamming. When the valve plate is detected to be in the correct position, the rotation of the power gear is stopped. The detection sensitivity of the detection mechanism is greater than that of the overload protection mechanism, which can increase the service life of the device under normal use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the internal structure of the control box in this utility model.

[0018] Figure 3 This is a schematic diagram showing the position of the first support column in this utility model.

[0019] Figure 4 This is an exploded structural diagram of the torque sensor location in this utility model.

[0020] In the diagram: 1. Valve body; 2. Valve shaft; 3. Valve plate; 4. Control box; 5. Power gear; 6. Overload protection mechanism; 7. Detection mechanism; 8. Circuit board; 9. Support block; 10. Partition plate; 11. Control room; 12. Power room; 13. Motor; 14. Connecting gear; 15. Torque sensor; 16. Electromagnetic clutch; 17. Connector; 18. Connecting groove; 19. Moving rod; 20. Fixed rod; 21. Pressure sensor; 22. First support column; 23. Fixed groove; 24. T-block; 25. Buffer ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The following is in conjunction with the appendix Figures 1 to 4 The specific embodiments of this utility model will be described in further detail.

[0023] Depend on Figures 1 to 4 As shown, this utility model includes a valve body 1. To increase the service life of the device, a valve shaft 2 is rotatably connected to the middle of the valve body 1, a valve plate 3 is fixedly connected to the lower part of the valve shaft 2, and a control box 4 is fixedly connected to the upper side of the valve body 1. A rotatable power gear 5 is provided inside the control box 4, and an overload protection mechanism 6 is provided between the power gear 5 and the valve shaft 2. A detection mechanism 7 for detecting the rotational position of the valve shaft 2 is provided inside the control box 4. A circuit board 8 is provided inside the control box 4, and a support block 9 is fixedly connected to the control box 4 on each of the front and rear sides of the circuit board 8. The support block 9 is a high-density sponge support, which can deform and provide support force, reducing damage to the circuit when subjected to impact. Moreover, by setting the support block 9, the gap inside the control box 4 can be reduced, and the amount of glue used can be reduced when performing glue potting operation on the circuit board 8.

[0024] It should be noted that the circuit board 8 has an integrated controller for receiving and outputting signals, which will not be described in detail here; the controller is preferably a PLC microcontroller, specifically the PIC12F615-I / SN SOP8.

[0025] During use, under the signal output of the circuit board 8 inside the control box 4, the power gear 5 will be driven to rotate, which in turn will drive the valve shaft 2 to rotate. During the power transmission process, the overload protection mechanism 6 will detect the torque delivered by the power gear 5 to the valve shaft 2 in real time. When the valve shaft 2 drives the valve plate 3 to rotate and jamming occurs, the overload protection mechanism 6 can detect the increase in torque output by the power gear 5 to the valve shaft 2, and then transmit a signal to the circuit board 8 to stop the power gear 5 from rotating, thereby reducing the probability of the power gear 5 driving the valve plate 3 to overload and causing damage to the valve plate 3.

[0026] When there is no jamming, the detection mechanism 7 can detect the rotation position of the valve plate 3. When the valve plate 3 is detected to be in the correct position, the rotation of the power gear 5 is stopped. The detection sensitivity of the detection mechanism 7 is greater than that of the overload protection mechanism 6, which can increase the service life of the device under normal use. The support block 9 can support the circuit board 8, reducing the damage to the circuit board 8 caused by installation or vibration.

[0027] Furthermore, by Figures 1 to 4 As shown, in order to facilitate the installation of the device by the staff, a partition plate 10 is fixedly connected inside the control box 4. The partition plate 10 divides the inside of the control box 4 into a control chamber 11 and a power chamber 12. The support block 9 is fixedly connected to the side wall of the control chamber 11, and the power gear 5 is rotatably connected to the power chamber 12.

[0028] Furthermore, by Figures 1 to 4 As shown, in order to achieve better results, a motor 13 is fixedly connected inside the power chamber 12. A connecting gear 14 is fixedly connected to the upper side of the motor 13. The front side of the connecting gear 14 meshes with the power gear 5. The motor 13 is a servo motor 13, such as the servo motor 13 with model number HG-JR353, which is existing technology and will not be described in detail here. The motor 13 is electrically connected to the controller built into the circuit board 8. The controller controls the start, stop and rotation parameters of the motor 13.

[0029] When in use, after the motor 13 starts, it drives the power gear 5 to rotate through the connecting gear 14. By setting up the control room 11 and the power room 12, the installation of the device can be carried out in separate areas, which is convenient for the staff to install.

[0030] Furthermore, by Figures 1 to 4 As shown, in order to achieve better overload protection, the overload protection mechanism 6 includes a torque sensor 15 and an electromagnetic clutch 16. The torque sensor 15 is fixedly connected to the lower side of the power gear 5. The detection end of the torque sensor 15 is connected to the valve shaft 2. The rotating end of the electromagnetic clutch 16 is fixedly connected to the middle of the valve shaft 2. The fixed end of the electromagnetic clutch 16 is fixedly connected to the control box 4.

[0031] The torque sensor 15 is existing technology, such as the torque sensor 15 with model number LZ-N1, which is a static torque sensor 15 capable of transmitting torque, and will not be described in detail here; the electromagnetic clutch 16 is existing technology, such as the small clutch with model number TJ-cA, and will not be described in detail here.

[0032] In use, when the device is in operation and no jamming occurs, the torque of the power gear 5 is transmitted to the valve shaft 2 through the torque sensor 15, thereby driving the valve shaft 2 and the valve plate 3 to rotate. At this time, the rotating end of the electromagnetic clutch 16 is in a rotating state, and the valve shaft 2 can rotate freely relative to the electromagnetic clutch 16. After the detection mechanism 7 detects that the valve plate 3 has reached the correct rotation position, the motor 13 stops, and at the same time, the electromagnetic clutch 16 engages and locks, thereby preventing the valve shaft 2 from rotating. At this time, under the action of the electromagnetic clutch 16, the valve shaft 2 and the valve plate 3 can be prevented from loosening, and the probability of the torque sensor 15 being continuously stressed and its lifespan reduced can also be reduced.

[0033] Furthermore, by Figures 1 to 4 As shown, in order to facilitate assembly and installation, a connector 17 is fixedly connected to the detection end of the torque sensor 15, and a connecting groove 18 adapted to the connector 17 is provided on the upper side of the valve shaft 2.

[0034] When in use, the connector 17 and the connecting groove 18 cooperate to transmit rotational torque, which also makes it convenient for staff to install and assemble.

[0035] Furthermore, by Figures 1 to 4 As shown, in order to detect the rotational position of the valve plate 3, the detection mechanism 7 includes a moving rod 19, a fixed rod 20 and a pressure sensor 21. The moving rod 19 is fixedly connected to the outside of the valve shaft 2, the fixed rod 20 is fixedly connected to the inner bottom wall of the control box 4, and the pressure sensor 21 is set on the side of the fixed rod 20 close to the moving rod 19.

[0036] During use, as the valve shaft 2 rotates, the valve shaft 2 will rotate via the moving rod 19. After the valve shaft 2 rotates to its position, one side of the moving rod 19 will abut against the fixed rod 20. At this time, the pressure sensor 21 will detect the pressure. When the pressure reaches the preset value, the controller will send a signal to stop the motor 13 from rotating.

[0037] Furthermore, by Figures 1 to 4As shown, to reduce the probability of damage to the circuit board 8 during use, each support block 9 has an arc-shaped side near the circuit board 8; multiple first support columns 22 are fixedly connected to the inner bottom wall of the control chamber 11, and the circuit board 8 has fixing slots 23 corresponding to the first support columns 22. A T-shaped block 24 is threadedly connected to the upper side of each first support column 22, and a buffer ring 25 is provided between each T-shaped block 24 and the first support column 22. The bottom of each buffer ring 25 abuts against the upper side of the circuit board 8; the height of the first support column 22 and the support block 9 are...

[0038] It should be noted that the buffer ring 25 is made of rubber, and a support ring made of rubber is also provided on the upper side of the first support column 22. When the circuit board 8 is installed, the bottom of the circuit board 8 can be supported by the first support column 22 and the support ring. Then, each T-block 24 can be installed on the upper side of the first support column 22. At this time, under the action of the buffer ring 25, the circuit board 8 can be pressed down to the upper side of the first support column 22. The two support blocks 9 can support the front and rear sides of the circuit board 8.

[0039] It should be further explained that the torque sensor 15, electromagnetic clutch 16, pressure sensor 21, and motor 13 are all connected to the controller integrated inside the circuit board 8. In addition, this device also integrates a power module to supply power to the torque sensor 15, electromagnetic clutch 16, pressure sensor 21, motor 13, and the controller of the circuit board 8. This utility model does not improve the circuit structure of the circuit board 8 and the controller, or the control system.

[0040] When this utility model is in use, under the signal output of the circuit board 8 inside the control box 4, the power gear 5 will be driven to rotate, and then the valve shaft 2 will be driven to rotate. During the power transmission process, the overload protection mechanism 6 will detect the torque delivered by the power gear 5 to the valve shaft 2 in real time. When the valve shaft 2 drives the valve plate 3 to rotate and jamming occurs, the overload protection mechanism 6 can detect the increase in torque output by the power gear 5 to the valve shaft 2, and then transmit a signal to the circuit board 8 to stop the power gear 5 from rotating, thereby reducing the probability of the valve plate 3 being damaged due to overload caused by the power gear 5 driving the valve plate 3 through the valve shaft 2.

[0041] When there is no jamming, the detection mechanism 7 can detect the rotation position of the valve plate 3. When the valve plate 3 is detected to be in the correct position, the rotation of the power gear 5 is stopped. The detection sensitivity of the detection mechanism 7 is greater than that of the overload protection mechanism 6, which can increase the service life of the device under normal use. The support block 9 can support the circuit board 8, reducing the damage to the circuit board 8 caused by installation or vibration.

[0042] This utility model has a novel structure, ingenious design, and simple and convenient operation. Through this design, it can effectively increase the service life of the device, facilitate the installation of the device by the staff, achieve better overload protection, facilitate assembly and installation, add the function of detecting the rotation position of the valve plate 3, and reduce the probability of damage to the circuit board 8 during use.

[0043] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An overload-protected electric butterfly valve, comprising a valve body, characterized in that: A valve shaft is rotatably connected to the middle of the valve body, and a valve plate is fixedly connected to the lower part of the valve shaft. A control box is fixedly connected to the upper side of the valve body. A rotatable power gear is provided inside the control box. An overload protection mechanism is provided between the power gear and the valve shaft. A detection mechanism for detecting the rotation position of the valve shaft is provided inside the control box. A circuit board is provided inside the control box. Support blocks are fixedly connected to the control box on both the front and rear sides of the circuit board. The overload protection mechanism includes a torque sensor and an electromagnetic clutch. The torque sensor is fixedly connected to the lower side of the power gear, the detection end of the torque sensor is connected to the valve shaft, the rotation end of the electromagnetic clutch is fixedly connected to the middle of the valve shaft, and the fixed end of the electromagnetic clutch is fixedly connected to the control box.

2. The electric butterfly valve with overload protection according to claim 1, characterized in that: The control box is fixedly connected to a partition plate, which divides the interior of the control box into a control chamber and a power chamber. The support block is fixedly connected to the side wall of the control chamber, and the power gear is rotatably connected to the power chamber.

3. The electric butterfly valve with overload protection according to claim 2, characterized in that: A motor is fixedly connected inside the power chamber, and a connecting gear is fixedly connected to the upper side of the motor. The front side of the connecting gear meshes with the power gear.

4. The electric butterfly valve with overload protection according to claim 1, characterized in that: The detection end of the torque sensor is fixedly connected to a connector, and a connecting groove adapted to the connector is provided on the upper side of the valve shaft.

5. An overload-protected electric butterfly valve according to claim 1, characterized in that: The detection mechanism includes a moving rod, a fixed rod, and a pressure sensor. The moving rod is fixedly connected to the outside of the valve shaft, the fixed rod is fixedly connected to the inner bottom wall of the control box, and the pressure sensor is located on the side of the fixed rod near the moving rod.

6. The electric butterfly valve with overload protection according to claim 1, characterized in that: Each of the support blocks has an arc-shaped side near the circuit board.

7. An overload-protected electric butterfly valve according to claim 2, characterized in that: The inner bottom wall of the control room is fixedly connected with a plurality of first support columns. The circuit board has a fixing groove corresponding to each of the first support columns. Each first support column has a T-shaped block threadedly connected to its upper side. Each T-shaped block and the first support column are provided with a buffer ring. The bottom of each buffer ring abuts against the upper side of the circuit board.

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