Double-seal water inlet butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a double-seal water inlet butterfly valve which comprises a valve body, the inner wall of the valve body is rotatably connected with a valve rod, the outer wall of the valve rod is sleeved with a first valve plate and a second valve plate, the inner wall of the second valve plate is provided with a fixing assembly, the top of the valve rod is provided with a driving assembly, and the driving assembly is connected with the valve rod. The end of a transmission rod of the driving assembly is connected with a rotating disc, a limiting assembly is arranged on the outer wall of the rotating disc, the outer wall of the handle extrudes a limiting column by rotating the handle, the limiting column is stressed to be shrunk into the inner wall of the fixing frame and extrudes a reset spring, and the elastic potential energy of the reset spring is increased; when a clamping groove formed in the outer wall of the handle corresponds to a limiting column, elastic potential energy of a reset spring is used for pushing the limiting column to enter the inner wall of the handle to conduct limiting treatment on the handle, and when the device does not need to be used, the handle can be folded, accidental collision is prevented, and people can open and close the device conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a double-sealed water inlet butterfly valve. Background Art

[0002] The butterfly valve, also known as a flap valve or butterfly valve, is a simple regulating valve. With the advancement of industrial technology and the increasing demand for butterfly valve performance, butterfly valve design and manufacturing technology are also evolving. In the future, butterfly valves will develop in the direction of high temperature, high pressure, large diameter, high sealing performance, long life, and excellent regulating characteristics. At the same time, to meet the needs of different operating conditions, butterfly valve materials, sealing forms, and connection methods will also become more diverse.

[0003] The existing double-seal water inlet butterfly valve can refer to the Chinese utility model patent with authorization announcement number CN216382624U, which discloses a double-seal water inlet butterfly valve, "including a valve body, a valve seat, a drive assembly, a valve stem and a valve plate, two connecting seats are symmetrically fixedly connected at both ends of the valve body, and the connecting seat is provided with a sealing surface. The valve plate is provided with an annular groove and multiple sealing rings, and a receiving groove is provided in the connecting seat. Rubber rings are fixedly connected to both sides of the valve plate, one side of the rubber ring is exposed outside the valve plate, and a sealing block is fixedly connected to the side of the rubber ring close to the sealing surface, and the sealing block contacts the sealing surface. When the valve plate rotates with the valve stem, the multiple sealing rings fixedly connected to the annular groove of the valve plate rotate accordingly, and then a single sealing work is achieved through the mutual cooperation of the multiple sealing rings and the receiving groove on the connecting seat. The impact of the water flow causes the rubber ring on the valve plate to be deformed, and then the sealing block fixedly connected to the rubber ring squeezes the sealing surface on the connecting seat, thereby achieving a double sealing work."

[0004] When the above device is in use, the valve plate rotates with the valve stem, and the multiple sealing rings fixedly connected to the annular groove of the valve plate rotate accordingly, and then a single sealing operation is achieved through the mutual cooperation of the multiple sealing rings and the receiving grooves on the connecting seat. However, the above device is not convenient for the staff to rotate the valve stem, which reduces the practicality of the device. In addition, the above device will cause the rubber ring to wear during long-term use, making it inconvenient to replace the valve plate, thereby affecting the sealing performance of the device. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a double-seal water inlet butterfly valve, which has the advantages of making it easy for staff to rotate the valve stem, improving the practicality of the device, and facilitating the replacement of the valve plate, improving the sealing of the device, solving the problems raised by the above-mentioned background technology.

[0006] The utility model provides the following technical solution: a double-seal water inlet butterfly valve, comprising a valve body, the inner wall of the valve body being rotatably connected to a valve stem, the outer wall of the valve stem being sleeved with a first valve plate and a second valve plate, the inner wall of the second valve plate being provided with a fixing assembly, the top of the valve stem being provided with a driving assembly, the transmission rod end of the driving assembly being connected to a turntable, the outer wall of the turntable being provided with a limit assembly, and the inner wall of the limit assembly being rotatably connected to a handle;

[0007] The fixing assembly includes a pull rod and a clamping block, one end of the clamping block is inserted into the inner wall of the first valve plate to limit the first valve plate;

[0008] The limiting assembly includes a fixing frame and a limiting column. One end of the limiting column is inserted into the inner wall of the handle and is slidably connected to the inner wall of the handle.

[0009] As a preferred technical solution of the present invention, one end of the valve stem is inserted into the inner wall of the valve body and rotatably connected to the inner wall of the valve body, and the top of the valve body is connected to the transmission rod end of the drive assembly.

[0010] As a preferred technical solution of the present invention, the outer wall of the first valve plate is rotatably connected to the inner wall of the valve body, and a rubber pad is provided at the connection between the outer wall of the first valve plate and the valve body.

[0011] As a preferred technical solution of the present invention, the outer wall of the second valve plate is slidably connected to the inner wall of the valve body, and a rubber pad is provided at the connection between the outer wall of the second valve plate and the valve body.

[0012] As an optimal technical solution of the present invention, one end of the pull rod is inserted into the inner wall of the second valve plate, and the outer wall of the pull rod is slidingly connected to the inner wall of the second valve plate. The end of the pull rod located on the inner wall of the second valve plate is fixedly connected to the clamping block, and the end of the clamping block away from the pull rod is inserted into the inner wall of the first valve plate.

[0013] As a preferred technical solution of the present invention, a buffer spring is slidably sleeved on the outer wall of the pull rod, and a clamping block at one end of the buffer spring is fixedly connected.

[0014] As a preferred technical solution of the present invention, the fixing frame is fixed to the outer wall of the turntable, one end of the handle is rotatably connected to the inner wall of the fixing frame, the end of the limiting column away from the handle is fixedly connected to a connecting rod, the outer wall of the connecting rod is slidably connected to the inner wall of the fixing frame, and a return spring is slidably sleeved on the outer wall of the connecting rod.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The double-seal water inlet butterfly valve, by rotating the handle, causes the outer wall of the handle to squeeze the limit column, and the limit column is forced to retract into the inner wall of the fixing frame and squeeze the reset spring, so that the elastic potential energy of the reset spring increases. When the slot on the outer wall of the handle corresponds to the limit column, the elastic potential energy of the reset spring is used to push the limit column into the inner wall of the handle to limit the handle. When it is not needed, the handle can also be put away to prevent accidental contact, making it easier for personnel to open and close the device.

[0017] 2. The double-seal water inlet butterfly valve combines the first valve plate and the second valve plate together so that the outer wall of the first valve plate squeezes the block, and at the same time the block shrinks into the inner wall of the second valve plate and compresses the buffer spring, thereby increasing the elastic potential energy of the buffer spring. When the slot on the outer wall of the first valve plate corresponds to the block, the elastic potential energy of the buffer spring is utilized to push the block into the inner wall of the first valve plate, connecting the first valve plate and the second valve plate together, thereby facilitating the disassembly of the first valve plate and the second valve plate, and then facilitating the replacement of the first valve plate and the second valve plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 For this utility model Figure 2 A in the middle is an enlarged structural diagram;

[0021] Figure 4 This is a schematic diagram of the limiting structure of the utility model;

[0022] Figure 5 For this utility model Figure 4 Enlarged structural diagram at point B in the middle.

[0023] In the figure: 1. Valve body; 2. Valve stem; 3. First valve plate; 4. Second valve plate; 5. Fixing assembly; 501. Pull rod; 502. Block; 503. Buffer spring; 6. Driving assembly; 7. Turntable; 8. Limiting assembly; 801. Fixing bracket; 802. Connecting rod; 803. Limiting column; 804. Return spring; 9. Handle. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 5 A double-seal water inlet butterfly valve includes a valve body 1, the inner wall of the valve body 1 is rotatably connected to a valve stem 2, the outer wall of the valve stem 2 is sleeved with a first valve plate 3 and a second valve plate 4, the inner wall of the second valve plate 4 is provided with a fixing component 5, the top of the valve stem 2 is provided with a driving component 6, the transmission rod end of the driving component 6 is connected to a turntable 7, the outer wall of the turntable 7 is provided with a limit component 8, and the inner wall of the limit component 8 is rotatably connected to a handle 9;

[0026] The fixing assembly 5 includes a pull rod 501 and a block 502. One end of the block 502 is inserted into the inner wall of the first valve plate 3 to limit the first valve plate 3. One end of the pull rod 501 is inserted into the inner wall of the second valve plate 4, and the outer wall of the pull rod 501 is slidably connected to the inner wall of the second valve plate 4. The end of the pull rod 501 located on the inner wall of the second valve plate 4 is fixedly connected to the block 502. The end of the block 502 away from the pull rod 501 is inserted into the inner wall of the first valve plate 3. The outer wall of the pull rod 501 is slidably sleeved with a buffer spring 503, and one end of the buffer spring 503 is clamped to the block 502. Fixed connection, by merging the first valve plate 3 and the second valve plate 4 together, so that the outer wall of the first valve plate 3 squeezes the block 502, and at the same time the block 502 shrinks into the inner wall of the second valve plate 4 and compresses the buffer spring 503, so that the elastic potential energy of the buffer spring 503 increases. When the slot opened on the outer wall of the first valve plate 3 corresponds to the block 502, the elastic potential energy of the buffer spring 503 is used to push the block 502 into the inner wall of the first valve plate 3, and the first valve plate 3 and the second valve plate 4 are connected together, which facilitates the disassembly of the first valve plate 3 and the second valve plate 4.

[0027] The limiting assembly 8 includes a fixing frame 801 and a limiting column 803. One end of the limiting column 803 is inserted into the inner wall of the handle 9 and is slidably connected to the inner wall of the handle 9. The fixing frame 801 is fixed to the outer wall of the turntable 7, and one end of the handle 9 is rotatably connected to the inner wall of the fixing frame 801. The end of the limiting column 803 away from the handle 9 is fixedly connected to the connecting rod 802. The outer wall of the connecting rod 802 is slidably connected to the inner wall of the fixing frame 801, and a return spring 804 is slidably sleeved on the outer wall of the connecting rod 802. By rotating the handle 9, the outer wall of the handle 9 squeezes the limiting column 803, and the limiting column 803 is forced to retract into the inner wall of the fixing frame 801 and squeeze the return spring 804, so that the elastic potential energy of the return spring 804 increases. When the slot opened on the outer wall of the handle 9 corresponds to the limiting column 803, the elastic potential energy of the return spring 804 is used to push the limiting column 803 into the inner wall of the handle 9 to limit the handle 9.

[0028] One end of the valve stem 2 is inserted into the inner wall of the valve body 1 and is rotatably connected to the inner wall of the valve body 1 , and the top of the valve body 1 is connected to the transmission rod end of the drive assembly 6 .

[0029] The outer wall of the first valve plate 3 is rotatably connected to the inner wall of the valve body 1, and a rubber pad is provided at the connection between the outer wall of the first valve plate 3 and the valve body 1. The outer wall of the second valve plate 4 is slidably connected to the inner wall of the valve body 1, and a rubber pad is provided at the connection between the outer wall of the second valve plate 4 and the valve body 1.

[0030] Working principle: when in use, by rotating the handle 9, the outer wall of the handle 9 squeezes the limiting column 803, and the limiting column 803 is forced to retract into the inner wall of the fixing frame 801, and squeezes the return spring 804, so that the elastic potential energy of the return spring 804 increases. When the slot provided on the outer wall of the handle 9 corresponds to the limiting column 803, the elastic potential energy of the return spring 804 is used to push the limiting column 803 into the inner wall of the handle 9 to limit the handle 9. When it is not needed, the handle 9 can also be put away to prevent accidental contact, which is convenient for personnel to open and close the device. By 3 and the second valve plate 4 are merged together, so that the outer wall of the first valve plate 3 squeezes the block 502, and at the same time the block 502 shrinks into the inner wall of the second valve plate 4 and compresses the buffer spring 503, so that the elastic potential energy of the buffer spring 503 increases. When the slot on the outer wall of the first valve plate 3 corresponds to the block 502, the elastic potential energy of the buffer spring 503 is used to push the block 502 into the inner wall of the first valve plate 3, connecting the first valve plate 3 and the second valve plate 4 together, making it easy to disassemble the first valve plate 3 and the second valve plate 4, and then to replace the first valve plate 3 and the second valve plate 4.

[0031] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-seal water inlet butterfly valve, comprising a valve body (1), characterized in that: The inner wall of the valve body (1) is rotatably connected to a valve stem (2), the outer wall of the valve stem (2) is sleeved with a first valve plate (3) and a second valve plate (4), the inner wall of the second valve plate (4) is provided with a fixing assembly (5), the top of the valve stem (2) is provided with a driving assembly (6), the transmission rod end of the driving assembly (6) is connected to a turntable (7), the outer wall of the turntable (7) is provided with a limiting assembly (8), and the inner wall of the limiting assembly (8) is rotatably connected to a handle (9); The fixing assembly (5) comprises a pull rod (501) and a clamping block (502), one end of the clamping block (502) being inserted into the inner wall of the first valve plate (3) to limit the position of the first valve plate (3); The limiting assembly (8) comprises a fixing frame (801) and a limiting column (803), one end of the limiting column (803) is inserted into the inner wall of the handle (9) and is slidably connected to the inner wall of the handle (9).

2. A double-seal water inlet butterfly valve according to claim 1, characterized in that: One end of the valve stem (2) is inserted into the inner wall of the valve body (1) and is rotatably connected to the inner wall of the valve body (1), and the top of the valve body (1) is connected to the transmission rod end of the drive assembly (6).

3. The double-seal water inlet butterfly valve according to claim 1, characterized in that: The outer wall of the first valve plate (3) is rotatably connected to the inner wall of the valve body (1), and a rubber pad is provided at the connection between the outer wall of the first valve plate (3) and the valve body (1).

4. The double-seal water inlet butterfly valve according to claim 1, characterized in that: The outer wall of the second valve plate (4) is slidably connected to the inner wall of the valve body (1), and a rubber pad is provided at the connection between the outer wall of the second valve plate (4) and the valve body (1).

5. The double-seal water inlet butterfly valve according to claim 1, characterized in that: One end of the pull rod (501) is inserted into the inner wall of the second valve plate (4), and the outer wall of the pull rod (501) is slidably connected to the inner wall of the second valve plate (4). One end of the pull rod (501) located on the inner wall of the second valve plate (4) is fixedly connected to the clamping block (502), and the end of the clamping block (502) away from the pull rod (501) is inserted into the inner wall of the first valve plate (3).

6. The double-seal water inlet butterfly valve according to claim 1, characterized in that: The outer wall of the pull rod (501) is slidably sleeved with a buffer spring (503), and one end of the buffer spring (503) is fixedly connected with a clamping block (502).

7. The double-seal water inlet butterfly valve according to claim 1, characterized in that: The fixing frame (801) is fixed to the outer wall of the rotating disk (7), one end of the handle (9) is rotatably connected to the inner wall of the fixing frame (801), the end of the limiting column (803) away from the handle (9) is fixedly connected to the connecting rod (802), the outer wall of the connecting rod (802) is slidably connected to the inner wall of the fixing frame (801), and the outer wall of the connecting rod (802) is slidably sleeved with a reset spring (804).

Images