Anti-explosion electric butterfly valve

Abstract

The utility model discloses an anti-explosion electric butterfly valve, and relates to the technical field of mechanical structure design. Comprising a valve body, a main butterfly plate is movably arranged in the valve body, a hollow part is fixedly arranged in the main butterfly plate, an auxiliary butterfly plate is movably connected to the front face of the main butterfly plate, an auxiliary valve rod is arranged in the auxiliary butterfly plate in a penetrating mode, and a second motor is fixedly arranged at the top of the auxiliary valve rod; the right-hand threads are arranged on the upper half portion of the auxiliary valve rod, the left-hand threads are arranged on the lower half portion of the auxiliary valve rod, when the motor drives the auxiliary valve rod to rotate, the opposite threads on the auxiliary valve rod can drive the upper auxiliary butterfly plate and the lower auxiliary butterfly plate to move vertically upwards and vertically downwards respectively, and therefore a tiny gap between the upper auxiliary butterfly plate and the lower auxiliary butterfly plate can be accurately controlled; the explosion-proof electric butterfly valve has a small-flow linear adjusting function, fills up the application blank of a traditional butterfly valve in the high-end industrial field, and has remarkable market competitiveness and innovation value.

Description

Technical Field

[0001] This utility model relates to the field of mechanical structure design technology, specifically to an explosion-proof electric butterfly valve. Background Technology

[0002] Explosion-proof electric butterfly valves are valve devices that combine explosion-proof functionality with electric actuation. They control the rotation of the butterfly plate via an electric actuator to achieve the on / off switching or flow regulation of fluid within the pipeline. They feature a compact structure, rapid opening and closing, low operating torque, excellent sealing performance, corrosion resistance, and remote automated control, offering high operational safety and convenience.

[0003] Chinese utility model patent CN215258394U discloses a mine-use explosion-proof electric butterfly valve, relating to the technical field of electric butterfly valves. This mine-use explosion-proof electric butterfly valve includes a valve body, a control device fixedly connected to the top of the valve body, fixed frames on both sides of the valve body, and racks fixedly connected to one side of each of the two fixed frames. The racks are connected to the valve body via a transmission component. An air bladder ring is fixedly connected to the inner wall of each fixed frame, and a connecting frame is fixedly connected to the outer side of the valve body. In this mine-use explosion-proof electric butterfly valve, a fixed plate drives a push rod to move, causing the push rod to push a push plate to slide inside the connecting frame. Air inside the connecting frame is forced through a connecting pipe into the air bladder ring fixedly connected to the outer side of the fixed frame. This inflated air bladder ring encloses the connection between the valve body and the outer connecting pipe, significantly improving the airtightness of the valve body and the outer connecting pipe.

[0004] However, the aforementioned explosion-proof electric butterfly valves do not have the function of linear adjustment for small flow rates. When the opening and closing degree reaches 10%-30%, the flow rate of the medium passing through has already reached 20%-70% of the total flow rate, which is difficult to control precisely and cannot meet the needs of fine chemical, gas mixing and other scenarios. The valve needs to be opened and closed frequently to adjust the small flow rate, which directly increases the wear of the sealing surface and may even lead to fatigue fracture of the valve stem, thus shortening the service life of the overall equipment. Summary of the Invention

[0005] This invention provides an explosion-proof electric butterfly valve to solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an explosion-proof electric butterfly valve, comprising a valve body, a control device fixedly connected to the top of the valve body, a main butterfly plate movably disposed inside the valve body, a secondary butterfly plate movably connected to the front of the main butterfly plate, a main valve stem penetrating through the interior of the main butterfly plate, the top of the main valve stem penetrating through the bottom of the control device and extending into the interior of the control device, a first motor fixedly disposed inside the control device, and the output end of the first motor fixedly connected to the top of the main valve stem, a hollow portion fixedly disposed inside the main butterfly plate, a first T-shaped groove fixedly disposed on the front of the main butterfly plate, and a second T-shaped groove fixedly disposed on the front of the main butterfly plate;

[0007] A first T-shaped slider is fixedly connected to the back of the secondary butterfly plate, and a second T-shaped slider is fixedly connected to the back of the secondary butterfly plate. A double-threaded secondary valve stem is disposed through the interior of the secondary butterfly plate. The upper half of the secondary butterfly plate is designated as an upper secondary butterfly plate, and the lower half of the secondary butterfly plate is designated as a lower secondary butterfly plate. The upper half of the double-threaded secondary valve stem is designated as a right-hand threaded upper secondary valve stem, and the lower half of the double-threaded secondary valve stem is designated as a left-hand threaded lower secondary valve stem. The right-hand threaded upper secondary valve stem is disposed through the interior of the upper secondary butterfly plate, and the left-hand threaded lower secondary valve stem is disposed through the interior of the lower secondary butterfly plate. A second motor is fixedly disposed at the top of the double-threaded secondary valve stem, and the second motor is electrically connected to the control device.

[0008] Furthermore, a first T-shaped slider is slidably connected inside the first T-shaped groove, and a second T-shaped slider is slidably connected inside the second T-shaped groove.

[0009] Furthermore, a first limiting plate is fixedly installed inside the first T-shaped groove.

[0010] Furthermore, a second limiting plate is fixedly installed inside the second T-shaped groove.

[0011] Furthermore, an anti-static rubber gasket is fixedly installed between the main butterfly plate and the valve body.

[0012] Furthermore, the main valve stem and the double-threaded auxiliary valve stem are made of 316L stainless steel.

[0013] Compared with the prior art, this utility model provides an explosion-proof electric butterfly valve, which has the following advantages:

[0014] 1. This explosion-proof electric butterfly valve, by setting a second motor, an auxiliary butterfly plate, and a double-threaded auxiliary valve stem, features a right-hand thread on the upper half and a left-hand thread on the lower half. When the motor drives the double-threaded auxiliary valve stem to rotate, the opposite threads on it can respectively drive the upper and lower auxiliary butterfly plates to move vertically upward and vertically downward, respectively. This allows for precise control of the minute gap between the upper and lower auxiliary butterfly plates, enabling the explosion-proof electric butterfly valve to have a small flow linear regulation function. This fills the application gap of traditional butterfly valves in high-end industrial fields, giving it significant market competitiveness and innovative value.

[0015] 2. The explosion-proof electric butterfly valve, by setting a first T-shaped slide groove, a second T-shaped slide groove, a first T-shaped slider and a second T-shaped slider, allows the upper and lower auxiliary butterfly plates to be removed from the main butterfly plate respectively through the first T-shaped slider and the second T-shaped slider fixedly connected thereon, which facilitates the cleaning, maintenance and replacement of some of the components. Attached Figure Description

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

[0017] Figure 2 This is a schematic diagram of the main butterfly plate structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the secondary butterfly plate structure of this utility model;

[0019] Figure 4 This is an exploded view of the main and auxiliary butterfly plate structure of this utility model;

[0020] Figure 5 This is an enlarged structural diagram of part A of this utility model.

[0021] Figure 6 This is an enlarged structural diagram of part B of this utility model.

[0022] Figure 7 This is an enlarged structural diagram of part C of this utility model.

[0023] In the diagram: 1. Valve body; 2. Control device; 3. Main butterfly plate; 301. Main valve stem; 302. First motor; 303. Hollowed-out part; 304. First T-shaped slide groove; 305. Second T-shaped slide groove; 306. First limiting plate; 307. Second limiting plate; 308. First T-shaped slider; 309. Second T-shaped slider; 4. Secondary butterfly plate; 401. Upper secondary butterfly plate; 402. Lower secondary butterfly plate; 403. Double-threaded secondary valve stem; 404. Right-hand threaded upper secondary valve stem; 405. Left-hand threaded lower secondary valve stem; 406. Second motor. Detailed Implementation

[0024] 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.

[0025] Please see Figure 1-7 This utility model discloses an explosion-proof electric butterfly valve, which includes a valve body 1. A control device 2 is fixedly connected to the top of the valve body 1. A main butterfly plate 3 is movably arranged inside the valve body 1. A secondary butterfly plate 4 is movably connected to the front of the main butterfly plate 3. A main valve stem 301 is disposed through the inside of the main butterfly plate 3. The top of the main valve stem 301 passes through the bottom of the control device 2 and extends into the inside of the control device 2. A first motor 302 is fixedly arranged inside the control device 2, and the output end of the first motor 302 is fixedly connected to the top of the main valve stem 301. A hollow part 303 is fixedly arranged inside the main butterfly plate 3. A first T-shaped groove 304 and a second T-shaped groove 305 are fixedly arranged on the front of the main butterfly plate 3.

[0026] A first T-shaped slider 308 is fixedly connected to the back of the secondary butterfly plate 4, and a second T-shaped slider 309 is fixedly connected to the back of the secondary butterfly plate 4. A double-threaded secondary valve stem 403 is provided through the interior of the secondary butterfly plate 4. The upper half of the secondary butterfly plate 4 is designated as an upper secondary butterfly plate 401, and the lower half of the secondary butterfly plate 4 is designated as a lower secondary butterfly plate 402. The upper half of the double-threaded secondary valve stem 403 is designated as a right-hand threaded upper secondary valve stem 404, and the lower half of the double-threaded secondary valve stem 403 is designated as a left-hand threaded lower secondary valve stem 405. The right-hand threaded upper secondary valve stem 404 is provided through the interior of the upper secondary butterfly plate 401, and the left-hand threaded lower secondary valve stem 405 is provided through the interior of the lower secondary butterfly plate 402. A second motor 406 is fixedly installed at the top of the double-threaded secondary valve stem 403, and the second motor 406 is electrically connected to the control device 2.

[0027] Specifically, a first T-shaped slider 308 is slidably connected inside the first T-shaped groove 304, and a second T-shaped slider 309 is slidably connected inside the second T-shaped groove 305.

[0028] In this embodiment, by slidably connecting a first T-shaped slider 308 inside the first T-shaped groove 304 and a second T-shaped slider 309 inside the second T-shaped groove 305, the upper sub-butterfly plate 401 and the lower sub-butterfly plate 402 can be guided when moving.

[0029] Specifically, a first limiting plate 306 is fixedly installed inside the first T-shaped slide 304.

[0030] In this embodiment, a first limiting plate 306 is fixedly installed at the top position of the inner wall of the first T-shaped slide 304, which can play a limiting role when the upper auxiliary butterfly plate 401 moves vertically upward.

[0031] Specifically, a second limiting plate 307 is fixedly installed inside the second T-shaped groove 305.

[0032] In this embodiment, a second limiting plate 307 is fixedly installed at the bottom of the inner wall of the second T-shaped slide 305, which can limit the movement of the lower sub-butterfly plate 402 vertically downward.

[0033] Specifically, an anti-static rubber gasket is fixedly installed between the main butterfly plate 3 and the valve body 1.

[0034] In this embodiment, an anti-static rubber gasket is fixedly installed between the main butterfly plate 3 and the valve body 1, which not only serves to prevent static electricity but also enhances the overall sealing performance of the valve.

[0035] Specifically, the main valve stem 301 and the double-threaded auxiliary valve stem 403 are made of 316L stainless steel.

[0036] In this embodiment, by setting the material of the main valve stem 301 and the double-threaded auxiliary valve stem 403 to 316L stainless steel, the corrosion resistance, mechanical properties and wear resistance of the explosion-proof electric butterfly valve can be significantly improved, while enabling the valve to operate stably for a long time in harsh media environments and extending its service life.

[0037] In operation, the first motor 302 drives the main valve stem 301 to rotate. The rotation of the main valve stem 301 causes the main butterfly plate 3 to rotate, which in turn drives the T-shaped slider and the auxiliary butterfly plate 4 to rotate, thus opening and closing the valve. When the valve is closed, the second motor 406 drives the double-threaded auxiliary valve stem 403 to rotate. The bidirectional threads on the double-threaded auxiliary valve stem 403 drive the upper auxiliary butterfly plate 401 and the lower auxiliary butterfly plate 402 to move vertically upwards and downwards, respectively. When the upper and lower auxiliary butterfly plates 401 and 402 move vertically upwards and downwards, respectively, a small gap is formed in the middle. At this time, the medium can flow out through the hollow part 303 of the main butterfly plate 3 and the small gap, allowing medium to flow without the need for opening and closing the entire valve. This reduces the workload and wear of the main butterfly plate 3 and extends the overall service life of the equipment.

[0038] In summary, this explosion-proof electric butterfly valve, by incorporating a second motor 406, a secondary butterfly plate 4, and a double-threaded secondary valve stem 403, with the upper half of the double-threaded secondary valve stem 403 being a right-handed thread and the lower half a left-handed thread, allows for precise control of the minute gap between the upper and lower secondary butterfly plates 401 and 402 when the motor drives the double-threaded secondary valve stem 403 to rotate. The opposing threads on the upper and lower secondary butterfly plates 401 and 402 respectively move vertically upwards and downwards, enabling precise control of the small gap between them. The linear flow regulation function fills the application gap of traditional butterfly valves in high-end industrial fields, giving it significant market competitiveness and innovative value. This explosion-proof electric butterfly valve, by setting a first T-shaped slide groove 304, a second T-shaped slide groove 305, a first T-shaped slider 308, and a second T-shaped slider 309, allows the upper auxiliary butterfly plate 401 and the lower auxiliary butterfly plate 402 to be detached from the main butterfly plate 3 respectively through the first T-shaped slider 308 and the second T-shaped slider 309 fixedly connected thereon, facilitating the cleaning, maintenance, and replacement of some components.

[0039] 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. An explosion-proof electric butterfly valve, comprising a valve body (1), characterized in that: A control device (2) is fixedly connected to the top of the valve body (1). A main butterfly plate (3) is movably arranged inside the valve body (1). A secondary butterfly plate (4) is movably connected to the front of the main butterfly plate (3). A main valve stem (301) is provided through the inside of the main butterfly plate (3). The top of the main valve stem (301) passes through the bottom of the control device (2) and extends into the inside of the control device (2). A first motor (302) is fixedly arranged inside the control device (2), and the output end of the first motor (302) is fixedly connected to the top of the main valve stem (301). A hollow part (303) is fixedly arranged inside the main butterfly plate (3). A first T-shaped groove (304) is fixedly arranged on the front of the main butterfly plate (3). A second T-shaped groove (305) is fixedly arranged on the front of the main butterfly plate (3). A first T-shaped slider (308) is fixedly connected to the back of the secondary butterfly plate (4), and a second T-shaped slider (309) is fixedly connected to the back of the secondary butterfly plate (4). A double-threaded secondary valve stem (403) is provided through the interior of the secondary butterfly plate (4). The upper half of the secondary butterfly plate (4) is configured as an upper secondary butterfly plate (401), and the lower half of the secondary butterfly plate (4) is configured as a lower secondary butterfly plate (402). The upper half of the double-threaded secondary valve stem (403) is configured as a right-hand threaded upper secondary valve stem (404). The lower half of the double-threaded auxiliary valve stem (403) is configured as a left-hand threaded lower auxiliary valve stem (405), and the right-hand threaded upper auxiliary valve stem (404) is disposed through the interior of the upper auxiliary butterfly plate (401). The left-hand threaded lower auxiliary valve stem (405) is disposed through the interior of the lower auxiliary butterfly plate (402). A second motor (406) is fixedly disposed on the top of the double-threaded auxiliary valve stem (403), and the second motor (406) is electrically connected to the control device (2).

2. The explosion-proof electric butterfly valve according to claim 1, characterized in that: The first T-shaped groove (304) is slidably connected to a first T-shaped slider (308), and the second T-shaped groove (305) is slidably connected to a second T-shaped slider (309).

3. The explosion-proof electric butterfly valve according to claim 1, characterized in that: A first limiting plate (306) is fixedly installed inside the first T-shaped groove (304).

4. The explosion-proof electric butterfly valve according to claim 1, characterized in that: The second T-shaped groove (305) is fixedly provided with a second limiting plate (307).

5. The explosion-proof electric butterfly valve according to claim 1, characterized in that: An anti-static rubber gasket is fixedly installed between the main butterfly plate (3) and the valve body (1).

6. The explosion-proof electric butterfly valve according to claim 1, characterized in that: The main valve stem (301) and the double-threaded auxiliary valve stem (403) are made of 316L stainless steel.

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