Electric double-eccentric butterfly valve

Abstract

The utility model relates to the technical field of electric double-eccentric butterfly valves, in particular to an electric double-eccentric butterfly valve which comprises a valve body and a sealing device, a shaft rod is rotatably connected to the inner wall of the valve body, a reduction gearbox is arranged above the valve body, a driving motor is arranged on one side of the reduction gearbox, and two connecting seats are fixedly connected to the surface of the shaft rod. The sealing device is arranged in the inner wall of the valve body, the sealing device comprises a groove formed in the inner wall of the valve body, the sealing device is arranged, gas in the box body is fed into a cavity between the sealing piece and the groove through the gas supply assembly, the sealing piece is arranged in the cavity, and the sealing piece is arranged in the cavity. The sealing element deforms and is tightly attached to the sealing ring on the surface of the valve plate, so that the sealing effect of the valve in a closed state can be greatly improved, the situation of sealing failure caused by deformation of a traditional sealing strip after long-time use is made up, normal operation of a pipeline system is guaranteed, waste caused by leakage of a working medium is reduced, and the service life of the valve is prolonged. The overall practicability of the equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric double eccentric butterfly valve technology, and in particular to an electric double eccentric butterfly valve. Background Technology

[0002] The electric double eccentric butterfly valve is a high-performance valve device. When the electric drive receives a control signal, it drives the valve shaft to rotate. The rotation of the valve shaft causes the valve plate to rotate around the center of the valve shaft, thereby realizing the opening and closing of the valve. During the opening process, the valve plate first rotates a certain angle to disengage the edge of the valve plate from the valve seat, and then continues to rotate until the valve is fully open. During the closing process, the valve plate moves in the opposite order and finally fits tightly with the valve seat to achieve a seal.

[0003] Existing technologies, such as the utility model with publication number CN213419920U, disclose an electric high-performance double eccentric butterfly valve, including a valve body, a valve plate, and a fixed seat. The valve body has a connecting seat on its upper middle side that communicates with the valve body's internal cavity. A rotating shaft is located in the middle of the connecting seat, and a worm gear is fixed to the upper end face of the rotating shaft. An upper seat housing is located at the upper port of the connecting seat, and an electric component that cooperates with the worm gear is located inside the upper seat housing. The valve plate is located within the valve body's internal cavity, and guide bolts are fixed to the side of the valve plate. The fixed seat is fixed to the rotating shaft. In the middle, side brackets are fixed to both sides of the fixed seat. The right side bracket has a slot in the middle, and the guide bolt slides into the slot. It also includes a gear and a tooth groove. The gear is fixed to the middle of the rotating shaft, and the tooth groove is located on the side of the valve plate. The gear meshes with the tooth groove. This electric high-performance double eccentric butterfly valve reduces the friction between the valve seat and the valve plate, ensures the sealing ability, and extends the overall service life. It solves the problem that the existing valve plate and valve seat still have unnecessary squeezing and scraping, which increases the resistance and wear shortens the life of the valve seat.

[0004] In daily work, it has been found that the sealing mechanism of existing electric double eccentric butterfly valves mainly relies on the sealing strip on the valve plate to achieve sealing. During long-term use, the sealing strip will deform, changing its original shape and size, making it unable to fit tightly with the valve seat, thus destroying the sealing effect of the valve plate. Fluid will then leak out from the gaps, affecting the normal operation of the electric double eccentric butterfly valve, and leading to the problem of single sealing and poor sealing performance of existing electric double eccentric butterfly valves. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of poor sealing performance in existing technologies by proposing an electric double eccentric butterfly valve.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an electric double eccentric butterfly valve, comprising a valve body and a sealing device, wherein a shaft is rotatably connected to the inner wall of the valve body, a reduction gearbox is disposed above the valve body, a drive motor is disposed on one side of the reduction gearbox, two connecting seats are fixedly connected to the surface of the shaft, a valve plate is disposed on one side of the connecting seats, the sealing device is disposed in the inner wall of the valve body, the sealing device includes a groove formed in the inner wall of the valve body, a sealing element is fixedly connected to the inner wall of the groove, a cavity is formed between the sealing element and the groove, and a sealing ring is fixedly connected to the surface of the valve plate. An air inlet pipe is fixedly connected to the outer surface of the valve body, and the air inlet pipe is connected to the inner wall of the cavity. A fixing seat is fixedly connected to the surface of the valve body, and a housing is fixedly connected to the surface of the fixing seat. A connecting pipe is fixedly connected to the surface of the housing, and the other end of the connecting pipe is connected to the air inlet pipe. An air supply assembly is provided on the inner wall of the housing. Through the above components, when the valve plate drives the sealing ring to close and seal, the gas in the housing can be input into the cavity through the connecting pipe and the air inlet pipe via the air supply assembly. The gas then squeezes the sealing element, and the sealing element can fit tightly with the sealing ring, thereby improving the overall sealing effect.

[0007] Preferably, the gas supply assembly includes a cylinder, which is fixedly connected to the lower surface of the housing. The output end of the cylinder extends into the inner wall of the housing and is fixedly connected to a push plate. Through the above components, when supplying gas, the cylinder can drive the push plate to move within the housing, thereby pushing the gas in the housing into the cavity.

[0008] Preferably, a sealing gasket is fixedly connected to the outer surface of the push plate. Through the above-mentioned components, the overall air supply sealing can be improved when the push plate moves in conjunction with the sealing gasket.

[0009] Preferably, the sealing element includes a deformable portion fixedly connected to the inner wall of the groove, and a thickened portion fixedly connected to the surface of the deformable portion. Through the above components, the deformable portion in the sealing element can be deformed by gas extrusion, and the thickened portion can improve the overall strength of the sealing element and make it less prone to breakage.

[0010] Preferably, an auxiliary device is provided between the connecting seat and the valve plate. The auxiliary device includes two inserts fixedly connected to the surface of the valve plate. The inserts are inserted into the inner wall of the connecting seat. The surface of the shaft is threaded, and two threaded sleeves are threadedly connected to the threaded part of the shaft. A fitting is rotatably connected to the surface of the threaded sleeve. The fitting is sleeved and connected to the shaft. An insert rod is fixedly connected to the surface of the fitting. The insert rod is inserted into the inner wall of the connecting seat and the inserts respectively. Through the above components, the threaded sleeves can drive the fitting and the insert rod to move, thereby removing the restraint on the inserts and facilitating the removal of the inserts from the connecting seat, realizing the disassembly of the valve plate and improving the overall usability.

[0011] Preferably, the surface of the threaded sleeve is fixedly connected with three protrusions. Through the above-mentioned components, the protrusions facilitate the operator to control the rotation of the threaded sleeve, thereby improving the overall ease of use.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, by setting a sealing device, the gas in the box is sent into the cavity between the sealing element and the groove through the gas supply component, so that the sealing element is deformed and tightly fits with the sealing ring on the surface of the valve plate. This can greatly improve the sealing effect of the valve in the closed state, thereby making up for the situation where the traditional sealing strip is deformed due to long-term use and the sealing fails. This ensures the normal operation of the pipeline system, reduces the waste of working medium due to leakage, and improves the overall practicality of the equipment.

[0014] 2. In this utility model, by setting an auxiliary device, the valve plate in the electric double eccentric butterfly valve can be quickly disassembled from the shaft, which facilitates subsequent maintenance and improves the overall usability of the equipment. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of an electric double eccentric butterfly valve is provided for this utility model;

[0016] Figure 2 This utility model provides a partial structural schematic diagram of an electric double eccentric butterfly valve;

[0017] Figure 3 A cross-sectional structural diagram of an electric double eccentric butterfly valve is provided for this utility model.

[0018] Figure 4 This utility model presents a cross-sectional structural diagram of an electric double eccentric butterfly valve from another perspective.

[0019] Figure 5 This utility model proposes an electric double eccentric butterfly valve. Figure 4 Schematic diagram of the structure at point A in the middle;

[0020] Figure 6 This invention presents an exploded structural diagram of an auxiliary device for an electric double eccentric butterfly valve.

[0021] Legend:

[0022] 1. Valve body; 2. Gearbox; 3. Drive motor; 4. Valve plate; 5. Shaft; 6. Sealing device; 61. Groove; 62. Seal; 621. Deformed part; 622. Thickened part; 63. Cavity; 64. Inlet pipe; 65. Fixing seat; 66. Housing; 67. Cylinder; 68. Push plate; 69. Connecting pipe; 610. Sealing gasket; 611. Sealing ring; 7. Auxiliary device; 71. Insert block; 72. Kit; 73. Insert rod; 74. Threaded sleeve; 75. Protrusion; 8. Connecting seat. Detailed Implementation

[0023] Please see Figures 1-6 This utility model provides a technical solution: an electric double eccentric butterfly valve, including a valve body 1 and a sealing device 6. A shaft 5 is rotatably connected to the inner wall of the valve body 1. A reduction gearbox 2 is provided above the valve body 1. A drive motor 3 is provided on one side of the reduction gearbox 2. Two connecting seats 8 are fixedly connected to the surface of the shaft 5. A valve plate 4 is provided on one side of the connecting seat 8. The sealing device 6 is provided in the inner wall of the valve body 1.

[0024] Specifically, the sealing device 6 includes a groove 61 formed in the inner wall of the valve body 1, a sealing element 62 fixedly connected to the inner wall of the groove 61, forming a cavity 63 between the sealing element 62 and the groove 61, a sealing ring 611 fixedly connected to the surface of the valve plate 4, an air inlet pipe 64 fixedly connected to the outer surface of the valve body 1, the air inlet pipe 64 communicating with the inner wall of the cavity 63, a fixing seat 65 fixedly connected to the surface of the valve body 1, a housing 66 fixedly connected to the surface of the fixing seat 65, a connecting pipe 69 fixedly connected to the surface of the housing 66, the other end of the connecting pipe 69 communicating with the air inlet pipe 64, and an air supply component provided on the inner wall of the housing 66.

[0025] In this implementation scheme: when the valve plate 4 drives the sealing ring 611 to close and seal, the gas in the housing 66 can be introduced into the cavity 63 through the connecting pipe 69 and the air inlet pipe 64 via the gas supply assembly. The gas then squeezes the sealing element 62, and the sealing element 62 can fit tightly with the sealing ring 611, thereby improving the overall sealing effect.

[0026] Specifically, the gas supply assembly includes a cylinder 67, which is fixedly connected to the lower surface of the housing 66. The output end of the cylinder 67 extends into the inner wall of the housing 66 and is fixedly connected to a push plate 68. When supplying gas, the cylinder 67 can drive the push plate 68 to move within the housing 66, thereby pushing the gas in the housing 66 into the cavity 63.

[0027] Specifically, a sealing gasket 610 is fixedly connected to the outer surface of the push plate 68.

[0028] In this implementation scheme: when the push plate 68 moves in conjunction with the sealing gasket 610, it can improve the overall air supply sealing performance.

[0029] Specifically, the sealing element 62 includes a deformable part 621 fixedly connected to the inner wall of the groove 61, and a thickened part 622 fixedly connected to the surface of the deformable part 621. The deformable part 621 in the sealing element 62 can be deformed by gas extrusion, and the thickened part 622 can improve the overall strength of the sealing element 62 and make it less prone to breakage.

[0030] Specifically, an auxiliary device 7 is provided between the connecting seat 8 and the valve plate 4. The auxiliary device 7 includes two inserts 71 that are fixedly connected to the surface of the valve plate 4. The inserts 71 are inserted into the inner wall of the connecting seat 8. The surface of the shaft 5 is threaded. Two threaded sleeves 74 are threadedly connected to the threaded part of the shaft 5. The surface of the threaded sleeves 74 is rotatably connected to the sleeves 74. The sleeves 72 are sleeved and connected to the shaft 5. The surface of the sleeves 72 is fixedly connected to the insert rod 73. The insert rod 73 is inserted into the inner wall of the connecting seat 8 and the inserts 71 respectively.

[0031] In this implementation scheme: the threaded sleeve 74 can drive the kit 72 and the insert rod 73 to move, thereby removing the restraint on the insert block 71, making it easier to remove the insert block 71 from the connecting seat 8, realizing the disassembly of the valve plate 4, and improving the overall ease of use.

[0032] Specifically, the threaded sleeve 74 has three protrusions 75 fixedly connected to its surface. The protrusions 75 facilitate the operator's control of the rotation of the threaded sleeve 74, improving the overall ease of use.

[0033] Working principle: When valve body 1 needs to be closed, drive motor 3, in conjunction with reduction gearbox 2, controls shaft 5 to rotate. Shaft 5 drives valve plate 4 to rotate via connecting seat 8. After valve plate 4 rotates and closes, cylinder 67 is opened. Cylinder 67 can drive push plate 68 and sealing gasket 610 to move within housing 66, thereby compressing the gas in housing 66. The gas is discharged into cavity 63 between seal 62 and groove 61 through connecting pipe 69 and inlet pipe 64. After entering, the gas compresses seal 62, causing deformation part 621 in seal 62 to deform and drive... After the thickened part 622 moves and deforms to a certain position, the thickened part 622 in the seal 62 can fit against the sealing ring 611 surface of the valve plate 4, thereby improving the overall sealing performance. When the valve plate 4 is damaged and needs to be disassembled, the threaded sleeve 74 can be rotated on the shaft 5 by the protrusion 75, and the thread on the shaft 5 can drive the kit 72 and the insert rod 73 to move. After moving to a certain position, the insert rod 73 can be removed from the inner wall of the connecting seat 8 and the insert block 71. Then the insert block 71 can be pulled out from the connecting seat 8, and the valve plate 4 can be removed for maintenance and replacement.

Claims

1. An electric double eccentric butterfly valve, comprising a valve body (1) and a sealing device (6), characterized in that: A shaft (5) is rotatably connected to the inner wall of the valve body (1). A reduction gearbox (2) is provided above the valve body (1). A drive motor (3) is provided on one side of the reduction gearbox (2). Two connecting seats (8) are fixedly connected to the surface of the shaft (5). A valve plate (4) is provided on one side of the connecting seat (8). A sealing device (6) is provided in the inner wall of the valve body (1). The sealing device (6) includes a groove (61) formed in the inner wall of the valve body (1). A sealing element (62) is fixedly connected to the inner wall of the groove (61). The sealing element (62) and the groove (61) are connected in a certain way. A cavity (63) is formed between the valve plate (4) and the valve body (1). A sealing ring (611) is fixedly connected to the surface of the valve plate (4). An air inlet pipe (64) is fixedly connected to the outer surface of the valve body (1). The air inlet pipe (64) is connected to the inner wall of the cavity (63). A fixing seat (65) is fixedly connected to the surface of the valve body (1). A housing (66) is fixedly connected to the surface of the fixing seat (65). A connecting pipe (69) is fixedly connected to the surface of the housing (66). The other end of the connecting pipe (69) is connected to the air inlet pipe (64). An air supply assembly is provided on the inner wall of the housing (66).

2. The electric double eccentric butterfly valve according to claim 1, characterized in that: The air supply assembly includes a cylinder (67), which is fixedly connected to the lower surface of the housing (66). The output end of the cylinder (67) extends into the inner wall of the housing (66) and is fixedly connected to a push plate (68).

3. The electric double eccentric butterfly valve according to claim 2, characterized in that: A sealing gasket (610) is fixedly connected to the outer surface of the push plate (68).

4. The electric double eccentric butterfly valve according to claim 1, characterized in that: The sealing element (62) includes a deformable part (621) fixedly connected to the inner wall of the groove (61), and a thickened part (622) fixedly connected to the surface of the deformable part (621).

5. The electric double eccentric butterfly valve according to claim 1, characterized in that: An auxiliary device (7) is provided between the connecting seat (8) and the valve plate (4). The auxiliary device (7) includes two inserts (71) that are fixedly connected to the surface of the valve plate (4). The inserts (71) are inserted into the inner wall of the connecting seat (8). The surface of the shaft (5) is threaded. Two threaded sleeves (74) are threadedly connected to the threaded part of the shaft (5). A fitting (72) is rotatably connected to the surface of the threaded sleeve (74). The fitting (72) is sleeved and connected to the shaft (5). A plug (73) is fixedly connected to the surface of the fitting (72). The plug (73) is inserted into the inner wall of the connecting seat (8) and the insert (71) respectively.

6. The electric double eccentric butterfly valve according to claim 5, characterized in that: The surface of the threaded sleeve (74) is fixedly connected with a protrusion (75), and there are three protrusions (75).

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