Double worm gear driven butterfly valve

Abstract

The utility model relates to butterfly valve technical field especially relates to a double worm drive butterfly valve, including device body, the both ends of device body all are established with import and export, the top of import and export is fixedly connected with drive seat, the one side of drive seat is fixedly connected with alarm device, the bottom of drive seat is located in the inside rotation of import and export and is connected with butterfly plate, the upper and lower ends of butterfly plate are provided with monitoring assembly and limiting component respectively, the utility model discloses by setting by monitoring assembly, can when the valve stem axial or radial offset occurs, timely trigger contact action, and inductive probe will signal real -time transmission to control panel, and control system can immediately cut off rotating motor power, prevent the failure to expand, and through limiting component can reach the full open / close position after valve and when trouble, automatic starting, prevent the valve position drift because pipeline vibration, water hammer effect or external impact, ensure that the position keeps reliable, sealing durable effective.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a double worm gear driven butterfly valve. 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 that rotates around a valve shaft to open and close. These valves can control the flow of various types of fluids, including air, water, steam, corrosive media, mud, oil, liquid metals, and radioactive media. They primarily function as shut-off and throttling devices in pipelines. The butterfly valve's opening and closing element is a disc-shaped disc that rotates around its own axis within the valve body to achieve opening, closing, or regulation. In worm gear butterfly valves, a rotating handle is typically used, and the worm gear structure inside the valve rotates the disc, thus controlling the flow of pipeline media.

[0003] For example, patent number CN218625453U discloses a two-stage turbine butterfly valve, which is equipped with two sets of switching systems. When the first motor and the first rotating rod fail to open the valve, the device can be opened by the second motor and the second rotating rod, making the device more flexible and convenient to use. The bearings set at the upper and lower ends of the valve body make the transmission rod rotate more smoothly, reducing the wear between the transmission rod and the valve body and improving the service life of the device. The first connecting seat and the second connecting seat can effectively install the first fixed frame and the second fixed frame on the valve body, and make the replacement of the first fixed frame and the second fixed frame more convenient, which facilitates the inspection and maintenance of the device.

[0004] For example, patent number CN212616691U discloses a worm gear flange butterfly valve with a rotating scale. This valve features a scale mechanism on the right side of the worm gear box. The scale mechanism includes a first scale plate and a second scale plate, with mounting blocks fixedly connected to both sides of each plate. Grooves are formed on the upper and lower right side of the worm gear box, and mounting slots are formed on both sides of the inner walls of these grooves. One side of each scale plate is located inside one of the two grooves, and the surfaces of the four mounting blocks are located inside the four mounting slots. Rotating scales are engraved on the surfaces of both the first and second scale plates. A pointer is fixedly connected to the surface of the worm extending to the outside of the worm gear box. The rotating scales on the first and second scale plates allow the operator to effectively control the flow of the pipeline medium when closing the worm gear butterfly valve. Since the first and second scale plates can be disassembled and replaced on the worm gear box, wear and tear on the engraved scales after a period of use is avoided. This scale mechanism significantly improves the practicality of the worm gear butterfly valve.

[0005] However, existing worm gear butterfly valves cannot monitor the valve stem during use. If the valve stem deflects or the butterfly plate changes angle due to the impact of a substance, it cannot effectively achieve a sealing connection between the two ends, which can easily cause leakage. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a double worm gear driven butterfly valve, which solves the problem that existing worm gear butterfly valves cannot monitor the valve stem during use. If the valve stem deflects or the butterfly plate changes angle under the impact of materials, it cannot effectively achieve a sealing connection between the two ends, which can easily cause leakage.

[0007] The technical solution of this utility model is as follows: a double worm gear driven butterfly valve includes a device body, with inlets and outlets at both ends of the device body. A drive seat is fixedly connected to the top of the inlet and outlet, and an alarm device is fixedly connected to one side of the drive seat. A butterfly plate is rotatably connected to the bottom of the drive seat inside the inlet and outlet. A monitoring component and a limiting component are respectively provided at the upper and lower ends of the butterfly plate. The monitoring component includes a connecting seat, with a contact block B movably connected to one end of the connecting seat. The front end of the contact block B extends to the outside of the valve stem. A sensing probe is provided at the top of the front end face of the connecting seat behind the contact block B. When the valve stem rotates, if the valve stem deflects, one end of the valve stem contacts the front end of the contact block B, and the contact block B is subjected to force and contacts the front end of the sensing probe. The limiting component includes a servo motor, with a transmission rod fixedly connected to the output end of the servo motor. A lead screw A is rotatably connected to one end of the transmission rod. Both ends of the lead screw A are provided with locking blocks. When the servo motor drives the transmission rod to rotate, the transmission rod cooperates with the lead screw A to drive the locking blocks to engage with the outside of the valve stem.

[0008] Preferably, a rotary motor is provided on the inner side of the drive seat, the top of the valve stem extends to the output end of the bottom of the rotary motor, the rotary motor and the valve stem are connected by a coupling, and the valve stem and the butterfly plate are an integral structure.

[0009] Preferably, the alarm device has a built-in buzzer alarm, and a control panel is fixedly connected to the top of the device body. The control panel is electrically connected to the drive base, the sensor probe, the alarm device, and the servo motor. The drive base, the sensor probe, the alarm device, and the servo motor can be controlled separately through the control panel.

[0010] Preferably, a contact block A is provided on the outer side of the valve stem tip, and one end of the contact block A is provided with a contact groove on the inner side of the contact block B, and one end of the contact block A extends to the inner side of the contact groove.

[0011] Preferably, a connecting spring is fixedly connected to the intersection of the contact block B and the connecting seat on the surface of the connecting seat. The contact block B is movably connected to the connecting seat through the connecting spring. A guide groove is provided on one side of the connecting seat on the inner wall of the inlet and outlet. One side of the connecting seat extends to the inner side of the guide groove. The connecting seat is movably connected to the inlet and outlet through the guide groove.

[0012] Preferably, bevel gears are provided at the top of the transmission rod and on the outer side of the center position of the lead screw A. When the transmission rod rotates, the transmission rod drives the lead screw A to rotate through the bevel gears.

[0013] Preferably, the lead screw A is a double-threaded lead screw with symmetrical threads at both ends. When the lead screw A rotates, it drives two locking blocks to move relative to each other inside the inlet and outlet. A limit groove is provided at the bottom of the valve stem. When the two locking blocks move, one end of the locking block is engaged inside the limit groove.

[0014] The beneficial effects of this utility model are:

[0015] This dual worm gear driven butterfly valve, through the setting of a monitoring component consisting of contact block B and a sensing probe, can promptly trigger a contact action when the valve stem experiences axial or radial displacement. The sensing probe transmits the signal to the control panel in real time, and the control system can immediately cut off the power to the rotary motor to prevent the fault from escalating. Furthermore, through the servo motor driving the transmission rod and the double-ended threaded screw A working together with the locking block to form a mechanical rigid lock, this limit component can automatically activate after the valve reaches the fully open / closed position and in case of a fault, preventing the valve position from drifting due to pipeline vibration, water hammer effect, or external impact, ensuring reliable position maintenance and long-lasting effective sealing. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural representation of this utility model. Figure 1 ;

[0017] Figure 2 The diagram shown is a three-dimensional structural representation of this utility model. Figure 2 ;

[0018] Figure 3 The diagram shown is a structural schematic of the monitoring component of this utility model;

[0019] Figure 4 The diagram shown is a structural schematic of the limiting component of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Device body; 2. Inlet / outlet; 3. Control panel; 4. Drive base; 5. Butterfly plate; 6. Valve stem; 7. Connecting base; 8. Contact block A; 9. Contact block B; 10. Contact groove; 11. Connecting spring; 12. Sensor probe; 13. Alarm device; 14. Locking block; 15. Servo motor; 16. Transmission rod; 17. Lead screw A; 18. Limiting groove. 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] Please see Figures 1-4 This utility model provides an embodiment of a double worm gear driven butterfly valve, including a device body 1. Both ends of the device body 1 have inlets and outlets 2. The inner walls of the inlets and outlets 2 are provided with wear-resistant linings. The outer edge of the butterfly plate 5 is covered with a corrosion-resistant sealing rubber layer. When the butterfly plate 5 rotates to the closed position, the sealing rubber layer and the wear-resistant lining are tightly fitted to form a bidirectional sealing structure, ensuring zero leakage of the medium. A drive seat 4 is fixedly connected to the top of the inlet and outlet 2. An alarm device 13 is fixedly connected to one side of the drive seat 4. The bottom end of the drive seat 4 is rotatably connected to the butterfly plate 5 inside the inlet and outlet 2. Monitoring components and limit components are respectively provided at the upper and lower ends of the butterfly plate 5. The detection component includes a connecting seat 7. One end of the connecting seat 7 is movably connected to a contact block B9. The front end of the contact block B9 extends to the outside of the valve stem 6. A sensing probe is provided at the top of the front face of the connecting seat 7 behind the contact block B9. 12. When the valve stem 6 is rotating, if the valve stem 6 deflects, one end of the valve stem 6 contacts the front end of the contact block B9. The contact block B9 is subjected to force and contacts the front end of the sensing probe 12. The sensing probe 12 is a proximity switch or a miniature pressure sensor. When the contact block B9 moves forward due to the valve stem 6 deflection and contacts the sensing probe 12, the sensing probe 12 transmits a signal to the control panel 3. The control panel 3 judges the fault status and automatically cuts off the power supply of the rotary motor. At the same time, it starts the servo motor 15 to perform an emergency limit operation. The limit component includes the servo motor 15. The output end of the servo motor 15 is fixedly connected to the transmission rod 16. One end of the transmission rod 16 is rotatably connected to the lead screw A17. Both ends of the lead screw A17 are provided with locking blocks 14. When the servo motor 15 drives the transmission rod 16 to rotate, the transmission rod 16 cooperates with the lead screw A17 to drive the locking blocks 14 to engage with the outside of the valve stem 6.

[0023] Please see Figures 1-2In this embodiment, a rotary motor is provided on the inner side of the drive seat 4, and the top of the valve stem 6 extends to the output end of the bottom of the rotary motor. The rotary motor and the valve stem 6 are connected by a coupling. The valve stem 6 and the butterfly plate 5 are an integral structure. The alarm device 13 has a built-in buzzer alarm. The top of the device body 1 is fixedly connected to the control panel 3. The control panel 3 is electrically connected to the drive seat 4, the sensor probe 12, the alarm device 13 and the servo motor 15. The drive seat 4, the sensor probe 12, the alarm device 13 and the servo motor 15 can be controlled by the control panel 3 respectively.

[0024] Please see Figures 3-4 In this embodiment, a contact block A8 is provided on the outer side of the top end of the valve stem 6. One end of the contact block A8 is located inside the contact block B9 and has a contact groove 10. One end of the contact block A8 extends to the inner side of the contact groove 10. A connecting spring 11 is fixedly connected to the surface of the connecting seat 7 at the intersection of the contact block B9 and the connecting seat 7. The contact block B9 is movably connected to the connecting seat 7 through the connecting spring 11. A guide groove is provided on one side of the connecting seat 7 on the inner wall of the inlet and outlet 2. One side of the connecting seat 7 extends to the inner side of the guide groove. The connecting seat 7 is movably connected to the inlet and outlet 2 through the guide groove. A bevel gear is provided on the top end of the transmission rod 16 and the outer side of the center position of the lead screw A17. When the transmission rod 16 rotates, the transmission rod 1... 6. The lead screw A17 is driven to rotate by a bevel gear. The lead screw A17 is a double-threaded lead screw with symmetrical threads at both ends. When the lead screw A17 rotates, it drives two locking blocks 14 to move relative to each other inside the inlet and outlet 2. The bottom end of the valve stem 6 has a limit groove 18. When the two locking blocks 14 move, one end of the locking block 14 is locked into the inner side of the limit groove 18. The locking block 14 is an arc-shaped clamping block with anti-slip texture or elastic buffer layer on its inner surface. The opening and closing action of the locking block 14 is interlocked with the opening and closing state of the valve stem 6. When the butterfly plate 5 is in the fully closed or fully open position, the servo motor 15 starts automatically, driving the locking block 14 to lock into the limit groove 18 to achieve mechanical position locking.

[0025] During operation, the device body 1 is placed in a suitable position, and the inlet and outlet 2 at both ends of the device body 1 are connected to other equipment. Then, the power is turned on and the device is started. The drive base 4 has an internal double worm gear transmission mechanism, which includes two meshing worm gears and a worm that cooperates with them. The worm is driven by a rotary motor. The two worm gears are connected to the top two sides of the valve stem 6 through a transmission shaft, thereby applying force to both ends of the valve stem 6 simultaneously. When the valve stem 6 rotates, it seals the device body 1 by working with the butterfly plate 5. The inner wall of the inlet and outlet 2 is provided with a wear-resistant lining, and the outer edge of the butterfly plate 5 is covered with a corrosion-resistant sealing rubber layer. When the butterfly plate 5 rotates to the closed position, the sealing rubber layer and the wear-resistant lining are tightly bonded. A bidirectional sealing structure is formed to ensure zero leakage of the medium. When the valve stem 6 is rotating, if the valve stem 6 deflects, one end of the valve stem 6 contacts the front end of the contact block B9. The contact block B9 is subjected to force and contacts the front end of the sensing probe 12. The sensing probe 12 is a proximity switch or a miniature pressure sensor. When the contact block B9 moves forward due to the deflection of the valve stem 6 and contacts the sensing probe 12, the sensing probe 12 transmits a signal to the control panel 3. The control panel 3 judges the fault status and automatically cuts off the power supply of the rotating motor. At the same time, the sensing probe 12 triggers the alarm device 13 to remind the staff and starts the servo motor 15. The servo motor 15 drives the locking block 14 to engage with the limit groove 18 through the transmission rod 16 and the lead screw A17, thereby realizing mechanical position locking.

[0026] Compared to CN218625453U, a two-stage turbine butterfly valve features two switching systems. When the first motor and first rotating rod malfunction and fail to open the valve, a second motor and second rotating rod can open the valve, making the device more flexible and convenient to use. Bearings at both ends of the valve body ensure smoother rotation of the transmission rod, reducing wear between the transmission rod and the valve body and extending the device's lifespan. The first and second connecting seats effectively mount the first and second fixing brackets onto the valve body, facilitating their replacement and simplifying maintenance. This is in contrast to CN212616691U, a worm gear flange butterfly valve with a rotary scale, which utilizes… The rotating scales on the first and second scale plates allow operators to control the pipeline medium switch in a timely and effective manner when closing the worm gear butterfly valve. Since the first and second scale plates can be disassembled and replaced on the worm gear box, the wear of the scales on the turntable after a period of use is avoided. The scale mechanism greatly improves the practicality of the worm gear butterfly valve. This application, by setting a monitoring component, can immediately cut off the power to the rotary motor when the valve stem deviates axially or radially, preventing the fault from escalating. Furthermore, the limit component can automatically start after the valve reaches the fully open / closed position and in case of a fault, preventing valve position drift caused by pipeline vibration, water hammer effect, or external impact, ensuring reliable position maintenance and long-lasting effective sealing.

[0027] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dual worm gear driven butterfly valve, comprising a device body (1), characterized in that: Both ends of the device body (1) are provided with inlet and outlet (2). The top of the inlet and outlet (2) is fixedly connected to the drive seat (4). An alarm device (13) is fixedly connected to one side of the drive seat (4). The bottom of the drive seat (4) is located inside the inlet and outlet (2) and is rotatably connected to the butterfly plate (5). The upper and lower ends of the butterfly plate (5) are respectively provided with monitoring components and limit components. The detection assembly includes a connecting seat (7), one end of which is movably connected to a contact block B (9). The front end of the contact block B (9) extends to the outside of the valve stem (6). A sensing probe (12) is provided at the top of the front end face of the connecting seat (7) behind the contact block B (9). When the valve stem (6) is rotating, if the valve stem (6) deflects, one end of the valve stem (6) contacts the front end of the contact block B (9), and the contact block B (9) is subjected to force and contacts the front end of the sensing probe (12). The limiting component includes a servo motor (15), the output end of which is fixedly connected to a transmission rod (16), one end of which is rotatably connected to a lead screw A (17), and both ends of the lead screw A (17) are provided with locking blocks (14). When the servo motor (15) drives the transmission rod (16) to rotate, the transmission rod (16) cooperates with the lead screw A (17) to drive the locking blocks (14) to engage with the outside of the valve stem (6).

2. The double worm gear driven butterfly valve according to claim 1, characterized in that: The inner side of the drive seat (5) is provided with a double worm gear transmission mechanism. The double worm gear transmission mechanism includes two meshing worm wheels and a worm that cooperates with them. The worm is driven by a rotary motor. The two worm wheels are respectively connected to the top two sides of the valve stem (6) through the transmission shaft, so as to apply force to both ends of the valve stem (6) synchronously.

3. The double worm gear driven butterfly valve according to claim 1, characterized in that: The alarm device (13) has a built-in buzzer alarm. The top of the device body (1) is fixedly connected to the control panel (3). The control panel (3) is electrically connected to the drive base (4), the sensor probe (12), the alarm device (13) and the servo motor (15). The drive base (4), the sensor probe (12), the alarm device (13) and the servo motor (15) can be controlled by the control panel (3).

4. The double worm gear driven butterfly valve according to claim 1, characterized in that: A contact block A (8) is provided on the outer side of the top of the valve stem (6). One end of the contact block A (8) is located inside the contact block B (9) and a contact groove (10) is provided. One end of the contact block A (8) extends to the inner side of the contact groove (10).

5. A double worm gear driven butterfly valve according to claim 1, characterized in that: The intersection of contact block B (9) and connecting seat (7) is located on the surface of connecting seat (7) and a connecting spring (11) is fixedly connected. Contact block B (9) is movably connected to connecting seat (7) through connecting spring (11). One side of connecting seat (7) is provided with a guide groove on the inner wall of inlet and outlet (2). One side of connecting seat (1) extends to the inner side of the guide groove. Connecting seat (7) is movably connected to inlet and outlet (2) through guide groove.

6. A double worm gear driven butterfly valve according to claim 1, characterized in that: A bevel gear is provided at the top of the transmission rod (16) and on the outer side of the center position of the lead screw A (17). When the transmission rod (16) rotates, the transmission rod (16) drives the lead screw A (17) to rotate through the bevel gear.

7. A double worm gear driven butterfly valve according to claim 1, characterized in that: The lead screw A (17) is a double-threaded lead screw. The threads at both ends of the lead screw A (17) are symmetrical. When the lead screw A (17) rotates, the lead screw A (17) drives the two locking blocks (14) to move relative to each other inside the inlet and outlet (2). The bottom end of the valve stem (6) is provided with a limit groove (18). When the two locking blocks (14) move, one end of the locking block (14) is locked into the inner side of the limit groove (18).

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