Butterfly valve for preventing dirt winding

Abstract

The utility model provides a prevent dirt to entwine's butterfly valve, including valve body, valve stem, butterfly plate, valve stem protection casing, control rod, eccentric cam, jacks and scraper, butterfly plate installs inside valve body, and valve stem passes through valve body top and is fixedly connected with butterfly plate, valve stem protection casing sets up on butterfly plate, and eccentric cam sets up inside valve stem protection casing, and control rod passes through valve body top and valve stem protection casing top and is fixedly connected with eccentric cam, and eccentric cam sets up on the plane which is perpendicular with butterfly plate horizontally, and can swing in the plane under the drive of control rod, one end of jacks and the side wall of eccentric cam slide connection, and the other end passes through the side wall of valve stem protection casing and is fixedly connected with one side of scraper, and scraper sets up in parallel with butterfly plate, and the side wall of jacks and the surface of butterfly plate slide connection. The valve of this butterfly valve still can scrape off the entanglement in the use state, need not to disassemble, avoided frequent stoppage of work disassembly and cleaning, radically solved the problem of blockage.

Description

Technical Field

[0001] This utility model belongs to the field of butterfly valve technology, and specifically a butterfly valve that prevents dirt from getting tangled. Background Technology

[0002] Butterfly valves, as common pipeline fluid control devices, are widely used in pipeline systems containing large amounts of impurities, such as municipal sewage and industrial wastewater. However, it has been found that soft impurities such as plastic bags and rags carried in the water flow easily become entangled on the valve plate. This entanglement can prevent the valve from closing completely when emergency water flow needs to be cut off, causing continuous internal leakage. In emergencies such as pipeline rupture or equipment maintenance, a valve that cannot close tightly will lead to the expansion of the accident area, the spread of pollution, or the inability to carry out maintenance work, posing serious safety and environmental hazards. In addition, cleaning these entangled materials usually requires the entire valve to be removed from the pipeline, a process that requires the system to shut down and its operation to be interrupted, which is not only difficult to operate but also results in significant economic and time losses.

[0003] Therefore, there is an urgent need for a new butterfly valve design that can effectively remove entangled materials without disassembling the valve, ensuring reliable sealing and stable operation of the valve. Utility Model Content

[0004] Purpose of the utility model: In order to solve the problems existing in the prior art, this utility model provides a butterfly valve that prevents dirt from getting tangled, effectively solving the problem that butterfly valves in sewage pipes are easily tangled with dirt, and dirt can be cleaned without disassembling the valve.

[0005] Technical solution: To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A butterfly valve for preventing dirt entanglement includes a valve body, a valve stem, a butterfly plate, a valve stem cover, a control rod, an eccentric cam, a push rod, and a scraper. The butterfly plate is installed inside the valve body. The valve stem passes vertically through the top of the valve body and is fixedly connected to the butterfly plate. The valve stem can rotate to cause the butterfly plate to flip, opening or closing the internal passage of the valve body. The valve stem cover is set on the butterfly plate. The eccentric cam is set inside the valve stem cover. The control rod passes vertically through the top of the valve body and the top of the valve stem cover and is fixedly connected to the eccentric cam. The eccentric cam is horizontally set on a plane perpendicular to the butterfly plate and can swing within the plane under the action of the control rod. One end of the push rod is slidably connected to the side wall of the eccentric cam, and the other end passes through the side wall of the valve stem cover and is fixedly connected to one side of the scraper. The scraper is set parallel to the butterfly plate. The side wall of the push rod is slidably connected to the surface of the butterfly plate. The swinging of the eccentric cam can cause the push rod to slide on the surface of the butterfly plate along the direction in which it is inserted into the valve stem cover.

[0007] As a specific implementation, the part of the valve stem cover where the eccentric cam is set has space for the eccentric cam to swing, and this space is perpendicular to the surface of the butterfly plate.

[0008] As a specific implementation, the valve stem guard and the butterfly plate are designed as an integrated unit, or the outer wall of the valve stem guard is sealed to the butterfly plate to ensure that the internal passage of the valve body is closed when the butterfly plate is closed.

[0009] In a specific implementation, the valve stem passes vertically through the top of the valve body and the top of the valve stem cover, and is fixedly connected to the inner wall of the valve stem cover. When the valve stem rotates, it can drive the butterfly plate to flip through the valve stem cover. The top of the valve body and the top of the valve stem cover, and the parts through which the valve stem passes, are sealed.

[0010] As a specific implementation, the eccentric cam has a pear-shaped profile, and the connection position between the control rod and the eccentric cam is located near the edge of the eccentric cam surface, so that when the eccentric cam swings around the connection position as an axis, it can generate a pushing and pulling effect on the push rod.

[0011] As a specific implementation, the side wall of the eccentric cam is provided with a groove, and a ball that can slide inside the groove is provided. One end of the push rod is slidably connected to the side wall of the eccentric cam through the ball.

[0012] As a specific implementation, a sleeve is fixedly connected to the surface of the butterfly plate, and the push rod passes through the sleeve and can slide inside the sleeve to achieve a sliding connection between the side wall and the surface of the butterfly plate.

[0013] As a specific implementation, a rubber pad is also provided on the inner wall of the valve body; the top of the valve body and the top of the valve stem cover, and the parts through which the control rod passes are sealed.

[0014] As a specific implementation, the top of the valve stem is provided with a handle that can control the rotation of the valve stem.

[0015] As a specific implementation, the top of the control lever is provided with a scraper switch that can control the rotation of the control lever; the rotation range of the control lever is 45 to 135°.

[0016] Beneficial effects: Compared with existing technologies, the butterfly valve of this utility model can still scrape off entangled materials while in use, without disassembly, avoiding frequent downtime for disassembly and cleaning, significantly reducing maintenance workload and production costs, and fundamentally solving the blockage problem. Furthermore, cleaning is achieved using the mechanical power of the rotating control lever, requiring no additional power or air supply, making it energy-efficient and reliable. Attached Figure Description

[0017] Figure 1 This is a front view of the butterfly valve of this utility model in the closed state.

[0018] Figure 2 This is a side view of the butterfly valve of this utility model in the closed state.

[0019] Figure 3 This is a top view of the connection state between the eccentric cam and the push rod when the scraper is retracted in the butterfly valve of this utility model.

[0020] Figure 4 This is a top view of the connection state between the eccentric cam and the push rod when the scraper is working in the butterfly valve of this utility model.

[0021] Figure 5 This is a three-dimensional schematic diagram of the eccentric cam in the butterfly valve of this utility model.

[0022] The following labels are used in the attached figures: 1-valve body; 101-rubber pad; 2-valve stem; 201-handle; 3-butterfly plate; 301-sleeve; 4-valve stem cover; 5-control lever; 501-scraper switch; 6-eccentric cam; 601-groove; 602-ball bearing; 7-top rod; 8-scraper. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings.

[0024] In the description of this utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "top", "bottom", "inner", "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent.

[0025] Example

[0026] A butterfly valve that prevents dirt from getting tangled, such as Figures 1-5 As shown, it includes valve body 1, valve stem 2, butterfly plate 3, valve stem cover 4, control rod 5, eccentric cam 6, push rod 7, and scraper 8.

[0027] The butterfly plate 3 is installed inside the valve body 1. The valve stem 2 passes vertically through the top of the valve body 1 and is fixedly connected to the butterfly plate 3. The valve stem 2 can rotate to drive the butterfly plate 3 to flip, opening or closing the internal passage of the valve body 1.

[0028] A valve stem cover 4 is mounted on the butterfly plate 3, and an eccentric cam 6 is mounted inside the valve stem cover 4. A control rod 5 vertically passes through the top of the valve body 1 and the top of the valve stem cover 4, and is fixedly connected to the eccentric cam 6. The eccentric cam 6 is horizontally mounted on a plane perpendicular to the butterfly plate 3 and can swing within this plane under the influence of the control rod 5. The portion of the valve stem cover 4 where the eccentric cam 6 is mounted provides space for its swing. This space is perpendicular to the surface of the butterfly plate 3 and must avoid the position of the valve stem 2 to prevent the valve stem 2 from affecting the swing of the eccentric cam 6. The valve stem cover 4 and the butterfly plate 3 can be an integrated design, or the outer wall of the valve stem cover 4 can be sealed to the butterfly plate 3 to ensure that the internal passage of the valve body 1 is closed when the butterfly plate 3 is closed.

[0029] One end of the push rod 7 is slidably connected to the side wall of the eccentric cam 6, and the other end passes through the side wall of the valve stem cover 4 and is fixedly connected to one side of the scraper 8. The scraper 8 is arranged parallel to the butterfly plate 3 (the shape of the other edge of the scraper 8 can match the shape of the edge of the butterfly plate 3 so that it can scrape off as much dirt as possible after protruding from the edge of the butterfly plate 3). The side wall of the push rod 7 is slidably connected to the surface of the butterfly plate 3. The swing of the eccentric cam 6 can drive the push rod 7 to slide on the surface of the butterfly plate 3 along the direction in which it is inserted into the valve stem cover 4. As one option, the eccentric cam 6 has a pear-shaped profile. The connection position between the control rod 5 and the eccentric cam 6 is located near the edge of the surface of the eccentric cam 6, so that when the eccentric cam 6 swings around the connection position as an axis, it can generate a pushing and pulling effect on the push rod 7, thereby enabling the push rod 7 to slide.

[0030] One end of the aforementioned push rod 7 is slidably connected to the side wall of the eccentric cam 6, which is achieved by the following scheme: the side wall of the eccentric cam 6 is provided with a groove 601, and a sliding ball 602 is provided inside the groove 601. One end of the push rod 7 is slidably connected to the side wall of the eccentric cam 6 through the connecting ball 602.

[0031] The side wall of the aforementioned push rod 7 is slidably connected to the surface of the butterfly plate 3 by the following scheme: a sleeve 301 is fixedly connected to the surface of the butterfly plate 3, the push rod 7 passes through the sleeve 301 and can slide inside the sleeve 301, thereby realizing the slidable connection between the side wall and the surface of the butterfly plate 3.

[0032] The valve stem 2 is vertically passed through the top of the valve body 1 and fixedly connected to the butterfly plate 3. This is achieved through the following scheme: the valve stem 2 vertically passes through the top of the valve body 1 and the top of the valve stem cover 4, and is fixedly connected to the inner wall of the valve stem cover 4. When the valve stem 2 rotates, it can drive the butterfly plate 3 to flip through the valve stem cover 4. The top of the valve body 1 and the top of the valve stem cover 4, and the part through which the valve stem 2 passes, are sealed, for example, with a rubber seal.

[0033] In addition, a rubber gasket 101 is provided on the inner wall of the valve body 1 to enhance the sealing effect when the butterfly plate 3 is closed; the top of the valve body 1 and the top of the valve stem cover 4, and the part through which the control rod 5 passes are sealed, for example, with rubber seals.

[0034] As another improvement, the top of the valve stem 2 is provided with a handle 201 that can control the rotation of the valve stem 2. The top of the control lever 5 is provided with a scraper switch 501 that can control the rotation of the control lever 5; the control lever 5 can be a square control lever, arranged from top to bottom, used only to control the opening and closing of the scraper, with a rotation range of 90°.

[0035] In the aforementioned butterfly valve, depending on the material of the butterfly plate 3, a sleeve 301 is attached to its surface by heat fusion or welding. For example, the entire valve can be made of UPVC, and the sleeve 301 is fixed to the surface of the butterfly plate 3 by heat fusion. The scraper 8 is made of high-strength, smooth, and corrosion-resistant sheet, such as 304 or 316 stainless steel, and the surface is polished or coated with Teflon.

[0036] When the butterfly valve is in operation, the scraper 8 is in close contact with the butterfly plate 3 when closed, with no protruding edges, thus not affecting the normal opening and closing of the valve. After the valve is opened, the push rod 7 and scraper 8 rotate synchronously with the butterfly plate 3. If debris gets tangled and prevents the valve from closing, the scraper switch 501 can be rotated, causing the eccentric cam 6 to rotate and push out the push rod 7 and scraper 8, lifting the dirt attached to the side of the scraper 8 and discharging it with the water flow. Repeat the operation until the dirt is removed and the valve can close tightly.

[0037] 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 butterfly valve for preventing dirt from entangled, characterized in that, The valve includes a valve body (1), a valve stem (2), a butterfly plate (3), a valve stem cover (4), a control rod (5), an eccentric cam (6), a push rod (7), and a scraper (8). The butterfly plate (3) is installed inside the valve body (1). The valve stem (2) passes vertically through the top of the valve body (1) and is fixedly connected to the butterfly plate (3). The valve stem (2) can rotate to drive the butterfly plate (3) to flip, opening or closing the internal passage of the valve body (1). The valve stem cover (4) is set on the butterfly plate (3), the eccentric cam (6) is set inside the valve stem cover (4), and the control rod (5) passes vertically through the top of the valve body (1) and the top of the valve stem cover (4). The eccentric cam (6) is fixedly connected to the eccentric cam (6), which is horizontally set on a plane perpendicular to the butterfly plate (3) and can swing in the plane under the drive of the control rod (5); one end of the push rod (7) is slidably connected to the side wall of the eccentric cam (6), and the other end passes through the side wall of the valve stem cover (4) and is fixedly connected to one side of the scraper (8). The scraper (8) is set parallel to the butterfly plate (3), and the side wall of the push rod (7) is slidably connected to the surface of the butterfly plate (3). The swing of the eccentric cam (6) can drive the push rod (7) to slide on the surface of the butterfly plate (3) along the direction in which it is inserted into the valve stem cover (4).

2. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The valve stem cover (4) has a portion where the eccentric cam (6) is located, and there is space for the eccentric cam (6) to swing. This space is perpendicular to the surface of the butterfly plate (3).

3. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The valve stem cover (4) and the butterfly plate (3) are designed as an integrated unit, or the outer wall of the valve stem cover (4) is sealed to the butterfly plate (3) to ensure that the internal passage of the valve body (1) is closed when the butterfly plate (3) is closed.

4. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The valve stem (2) passes vertically through the top of the valve body (1) and the top of the valve stem cover (4), and is fixedly connected to the inner wall of the valve stem cover (4). When the valve stem (2) rotates, it can drive the butterfly plate (3) to flip through the valve stem cover (4). The top of the valve body (1) and the top of the valve stem cover (4), and the part through which the valve stem (2) passes are sealed.

5. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The eccentric cam (6) has a pear-shaped profile. The connection position between the control rod (5) and the eccentric cam (6) is located near the edge of the eccentric cam (6) surface, so that when the eccentric cam (6) swings around the connection position as an axis, it can push and pull the push rod (7).

6. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The side wall of the eccentric cam (6) is provided with a groove (601), and a ball bearing (602) that can slide is provided inside the groove (601). One end of the push rod (7) is slidably connected to the side wall of the eccentric cam (6) through the ball bearing (602).

7. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, A sleeve (301) is fixedly connected to the surface of the butterfly plate (3). The push rod (7) passes through the sleeve (301) and can slide inside the sleeve (301) to achieve a sliding connection between the side wall and the surface of the butterfly plate (3).

8. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, A rubber pad (101) is also provided on the inner wall of the valve body (1); the top of the valve body (1) and the top of the valve stem cover (4), and the part through which the control rod (5) passes are sealed.

9. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The valve stem (2) is provided with a handle (201) at the top, which can control the rotation of the valve stem (2).

10. The butterfly valve for preventing dirt entanglement according to claim 1, characterized in that, The top of the control lever (5) is provided with a scraper switch (501) that can control the rotation of the control lever (5); the rotation range of the control lever (5) is 45 to 135°.

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