Valve stop structure

Abstract

The utility model discloses a valve cut-off structure which comprises a valve body and a valve cover, and belongs to the technical field of valve equipment. An opening is formed in the center of the valve body and the center of the valve deck, a driving disc and a plurality of valve clacks are arranged between the valve body and the valve deck, the driving disc is rotationally connected with the valve deck, the valve clacks are slidably connected with the valve body, and a transmission structure is arranged between the driving disc and the valve clacks. When the driving disc rotates, the driving disc can drive the valve clacks to move through the transmission structure so that the valve clacks can open and close the opening. Wherein sealing parts are arranged on the two faces of the driving disc respectively, the sealing parts abut against the opposite sides of the valve body and the valve deck in a sliding mode, and sealing pieces are arranged between the sealing parts and the valve body and between the sealing parts and the valve deck. The sealing performance of the valve can be improved, and the liquid leakage risk is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of valve equipment, and in particular to a valve cut-off structure. Background Art

[0002] Common valves used for shutoff functions include ball valves, butterfly valves, globe valves, and gate valves. A ball valve contains a sphere with one or more channels. As the ball rotates, the channels align or shift with the valve's inlet and outlet, thereby controlling the flow of fluid. A butterfly valve operates by opening or closing a fluid channel through the rotation of a disc-shaped disc. Butterfly valves offer a simple structure, are compact, and lightweight, making them suitable for large-diameter pipes. A globe valve is one of the most common valve types, featuring a straight-through channel and a fully closing disc. While globe valves can be used to control flow, they require significant force to open and close. A gate valve typically has a disc. When the disc is perpendicular to the flow direction, the valve closes; when the disc is parallel to the flow direction, the valve opens. Gate valves are suitable for controlling larger flows, but are larger and require more space for installation.

[0003] In the related art, patent publication number CN112228579A discloses an iris-type variable diameter valve, comprising a valve housing, a control disc disposed within the inner cavity of the valve housing, N blades, and a drive gear. The valve housing comprises a base and an end cap. The base body is annular and has a first protrusion integrally formed therewith on its outer circumference. The end cap body is annular and has a second protrusion integrally formed therewith on its outer circumference. The control disc is annular and coaxial with the base body or the end cap body. The N blades are disposed between the base and the control disc, and the control disc is pressed against the inner surface of the end cap. The drive gear is disposed between the first protrusion and the second protrusion and meshes with a gear structure on the control disc. The advantage of the present invention is that, under the action of an external drive device, the control disc cooperates with the first key to cause each blade to slide synchronously along a linear groove, thereby gradually covering or revealing the hollow circle in the control disc, thereby changing the flow-cutting area of ​​the pipeline.

[0004] With respect to the above-mentioned related technologies, the blades and the chassis slide relative to each other, and there is a risk that liquid may leak out of the valve from between the blades and the chassis. Utility Model Content

[0005] In order to improve the sealing performance, the present application provides a valve cut-off structure.

[0006] The valve cut-off structure provided in this application adopts the following technical solution:

[0007] A valve stop structure includes a valve body and a valve cover, wherein the valve body and the valve cover have openings in their centers, a driving disk and a plurality of valve flaps are arranged between the valve body and the valve cover, the driving disk is rotatably connected to the valve cover, and the plurality of valve flaps are slidably connected to the valve body, a transmission structure is provided between the driving disk and the valve flaps, and when the driving disk rotates, the plurality of valve flaps can be driven to move through the transmission structure so that the plurality of valve flaps can open and close the opening; wherein, sealing portions are respectively provided on both sides of the driving disk, the sealing portions are in sliding contact with the opposite sides of the valve body and the valve cover, and a sealing member is provided between the sealing portion, the valve body and the valve cover.

[0008] By adopting the above technical solution, even if the liquid can overflow from between the drive disc and the valve disc, the double sealing design of the sealing part and the sealing element can effectively seal the liquid within the drive disc, the valve body and the valve cover, thereby reducing the risk of liquid overflowing from the valve and improving the sealing of the valve.

[0009] Optionally, the side of the sealing portion facing away from the center of the driving disc is in sliding contact with the inner walls of the valve body and the valve cover.

[0010] By adopting the above technical solution, the sealing area is increased, a continuous and effective seal is formed, and the reliability of the seal is further improved.

[0011] Optionally, the sealing member is arranged between a side of the sealing portion facing away from the center of the driving disc and the inner walls of the valve body and the valve cover.

[0012] By adopting the above technical solution, the sealing effect is further enhanced.

[0013] Optionally, wear-resistant parts are provided between the valve body, the drive disc, the valve disc and the valve cover.

[0014] By adopting the above technical solution, direct contact and friction loss between components are reduced, protecting the key components of the valve. By adding wear-resistant parts, wear between components is reduced, thereby extending the service life of the valve.

[0015] Optionally, the wear-resistant part is a polytetrafluoroethylene strip.

[0016] By adopting the above technical solution, the PTFE strip has excellent wear resistance and self-lubricating properties, making it ideal for forming a lubricated isolation layer between valve components, thereby greatly reducing friction losses. By using PTFE strips and taking advantage of its unique material properties, friction losses are significantly reduced and the durability of the valve is enhanced.

[0017] Optionally, a groove is provided on one side of the valve flap, and a convex strip is provided on the other side, and the convex strip of one valve flap is slidably inserted into the groove of the adjacent valve flap.

[0018] By adopting the above technical solution, this structure can make the valve flaps fit more tightly together, reducing the possibility of fluid leakage.

[0019] Optionally, the transmission structure includes a transmission column, the driving disc is provided with an arc-shaped groove extending in an involute line, and the transmission column is inserted into the arc-shaped groove.

[0020] By adopting the above technical solution, this transmission structure can ensure that the driving disc can smoothly drive the valve disc to move when rotating, thereby realizing the opening and closing operation of the valve.

[0021] Optionally, a linear groove is provided on the inner wall of the valve body, the opening is a circular opening, the linear groove extends along the tangent direction of the circular opening, and a key-shaped boss and a cylindrical boss are provided on one side of the valve disc, and the key-shaped boss and the cylindrical boss are both slidably connected in the linear groove.

[0022] By adopting the above technical solution, this structure can make the valve disc more stable and reliable during movement.

[0023] Optionally, the key-shaped boss is located close to another adjacent valve flap, and the cylindrical boss is arranged at the center of the valve flap.

[0024] By adopting the above technical solution and reasonably setting the position of the boss, it can be ensured that the valve disc always maintains a stable posture during the movement process.

[0025] Optionally, a gear drive structure is provided in the valve body and the valve cover, a gear ring is provided on the peripheral side of the drive disc, and the gear drive structure is meshed with the gear ring.

[0026] By adopting the above technical solution, this structure can conveniently drive the driving disk to rotate through an external driving device, thereby realizing remote control of the valve.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The double sealing design of the sealing part and the sealing element can effectively seal the liquid within the drive disc, valve body and valve cover, reducing the risk of liquid overflowing from the valve and improving the valve sealing.

[0029] 2. The structural design of the grooves and ridges between the valve discs enables the valve discs to fit together more closely, thereby reducing the possibility of fluid leakage from the gaps between the valve discs; at the same time, it also enhances the overall structural strength and stability of the valve.

[0030] 3. Through reasonable transmission structure and component layout design, the entire valve shut-off structure is more compact and reasonable and easy to operate and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the structure of the valve body that is mainly displayed in this application.

[0032] Figure 2 It is a cross-sectional view of the overall structure of this application.

[0033] Figure 3 This application mainly shows the exploded schematic diagram of the valve disc and valve body.

[0034] Description of reference numerals:

[0035] 10. Valve body; 11. Linear groove; 20. Valve cover; 30. Opening; 40. Drive plate; 41. Sealing part; 42. Arc groove; 43. Ring gear; 50. Valve disc; 51. Groove; 52. Raised strip; 53. Transmission column; 54. Key-shaped boss; 55. Cylindrical boss; 60. Seal; 70. Wear-resistant part; 80. Gear drive structure. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-3 This application is described in further detail.

[0037] Reference Figure 1 and Figure 2 A valve shut-off structure provided in an embodiment of the present application includes a detachably connected valve body 10 and a valve cover 20. Optionally, the valve body 10 and the valve cover 20 are connected by bolts. An opening 30 is provided in the center of the valve body 10 and the valve cover 20 for fluid to pass through. A drive disc 40 and a plurality of valve flaps 50 are provided between the valve body 10 and the valve cover 20. The drive disc 40 is coaxially rotatably connected to the valve cover 20 so that the drive disc 40 can flexibly rotate between the valve body 10 and the valve cover 20. The plurality of valve flaps 50 are slidably connected to the valve body 10 so that the valve flaps 50 can perform corresponding sliding operations within the valve body 10. In other embodiments, the drive disc 40 may be rotatably connected to the valve body 10, and the plurality of valve flaps 50 may be slidably connected to the valve cover 20.

[0038] In order to realize the driving disk 40 driving the valve flap 50, a transmission structure is provided between the driving disk 40 and the valve flap 50. When the driving disk 40 is rotated, the transmission structure can drive the valve flap 50 to move accordingly, thereby realizing the opening or closing operation of the opening 30.

[0039] To enhance the valve's sealing properties, sealing portions 41 are provided on both sides of the drive disc 40. In this embodiment, the sealing portions 41 are integrally formed with the drive disc 40. These two sealing portions 41 slide against opposing sidewalls of the valve body 10 and the valve cover 20, respectively, ensuring a secure seal when the valve is closed. To further enhance the sealing effect, specialized sealing members 60 are provided between the sealing portions 41 and the valve body 10 and valve cover 20, effectively preventing fluid leakage between the valve body 10 and valve cover 20.

[0040] Specifically, the side of the sealing portion 41 facing away from the center of the drive disk 40 is designed to form a smooth sliding contact with the inner walls of the valve body 10 and the valve cover 20. This design increases the sealing area and ensures that the sealing portion 41 always fits tightly against the inner walls of the valve body 10 and the valve cover 20 during the rotation of the drive disk 40, thereby achieving efficient sealing. Furthermore, a sealing member 60 is installed between the sealing portion 41 and the inner walls of the valve body 10 and the valve cover 20.

[0041] In this embodiment, an annular groove is defined on the side of the sealing portion 41 facing away from the center of the drive disk 40, into which a sealing member 60 is embedded. The sealing member 60 is a sealing ring. In other embodiments, an annular groove may be defined on the side of the valve body 10 and valve cover 20 facing away from the center of the drive disk 40, into which the sealing member 60 is embedded. This allows the sealing member 60 to effectively fill any small gaps that may arise during the rotation of the drive disk 40, further enhancing sealing performance.

[0042] To reduce frictional damage between components, wear-resistant members 70 are installed on the contact surfaces between the valve body 10, drive plate 40, valve disc 50, and valve cover 20. These wear-resistant members 70 effectively reduce friction between components, thereby extending the service life of the valve. In a preferred embodiment, the wear-resistant members 70 are preferably polytetrafluoroethylene strips.

[0043] Specifically, mounting grooves may be provided on the contact surfaces between the valve body 10 , the drive plate 40 , the valve disc 50 and the valve cover 20 , and the polytetrafluoroethylene strips may be fixed by utilizing the mounting grooves.

[0044] Reference Figure 3 To enhance the overall structural strength and stability of the valve, a special mating structure is provided between the valve flaps 50. Each valve flap 50 has a groove 51 on one side and a ridge 52 on the other. In actual use, the ridge 52 of one valve flap 50 slides into the groove 51 of the adjacent valve flap 50. This design not only ensures a tight fit between the valve flaps 50, but also effectively reduces the risk of fluid leakage between the valve flaps 50.

[0045] Reference Figure 1 and Figure 3The transmission structure includes a transmission post 53, which is fixedly connected to the valve disc 50. The driving disc 40 is provided with an arcuate slot 42 extending in an involute shape, and the transmission post 53 is inserted into the arcuate slot 42. When the driving disc 40 rotates, the interaction between the arcuate slot 42 and the transmission post 53 can smoothly and effectively drive the valve disc 50 to move accordingly.

[0046] Regarding the connection design between the inner wall of the valve body 10 and the valve disc 50, a linear groove 11 is defined on the inner wall of the valve body 10, and the opening 30 is a circular opening. The linear groove 11 extends tangentially along the circular opening. A key-shaped boss 54 and a cylindrical boss 55 are provided on one side of the valve disc 50. Both bosses slide within their corresponding linear grooves 11. Preferably, the key-shaped boss 54 is positioned near the adjacent valve disc 50, while the cylindrical boss 55 is positioned at the center of the valve disc 50. This design ensures that the valve disc 50 remains stable during movement, further improving the operational stability and sealing performance of the valve.

[0047] Furthermore, a gear drive structure 80 is disposed within the valve body 10 and the valve cover 20. A ring gear 43 is disposed around the periphery of the drive plate 40, with which the gear drive structure 80 meshes. Optionally, the gear drive structure 80 has a double-tooth structure, wherein the drive teeth are connected to the drive source, and the transmission teeth mesh with the ring gear 43 and the drive teeth, respectively. The drive source drives the gear drive structure 80 to open and close the valve opening 30.

[0048] In this embodiment, when the valve flap 50 moves to the restricted position, the opening 30 is not completely closed. The purpose of this design is that other equipment, such as a pipeline, can be installed at the opening 30. That is, the space between the outer wall of the pipeline and the inner wall of the opening 30 is a liquid flow space, and the valve flap 50 can be used to open and close the liquid flow space.

[0049] In general, through reasonable design and optimization, the valve cut-off structure not only realizes the basic function of the valve, but also greatly improves the sealing, wear resistance and service life of the valve, meeting the high requirements for valve performance in industrial production.

[0050] The implementation principle of this embodiment is as follows: by providing a drive disc 40 with a sealing portion 41 and a valve flap 50 cooperating therewith, efficient sealing of the valve is achieved; wear-resistant parts 70 are used to reduce friction damage between components; the stability and reliability of the valve are ensured through the special matching structure between the valve flap 50 and the precise matching of the transmission structure and the drive disc 40; and the overall comprehensive performance and service life of the valve are improved.

[0051] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A valve cut-off structure, characterized in that: The valve body (10) and the valve cover (20) are provided with an opening (30) in the center of the valve body (10) and the valve cover (20); a driving disc (40) and a plurality of valve flaps (50) are provided between the valve body (10) and the valve cover (20); the driving disc (40) is rotatably connected to the valve cover (20); the plurality of valve flaps (50) are slidably connected to the valve body (10); a transmission structure is provided between the driving disc (40) and the valve flaps (50); when the driving disc (40) rotates, the plurality of valve flaps (50) can be driven to move via the transmission structure, so that the plurality of valve flaps (50) can open and close the opening (30); Wherein, sealing portions (41) are respectively provided on both sides of the driving disk (40), and the sealing portions (41) are in sliding contact with opposite sides of the valve body (10) and the valve cover (20), and a sealing member (60) is provided between the sealing portion (41), the valve body (10), and the valve cover (20).

2. A valve cut-off structure according to claim 1, characterized in that: The side of the sealing portion (41) facing away from the center of the driving disc (40) is in sliding contact with the inner walls of the valve body (10) and the valve cover (20).

3. A valve cut-off structure according to claim 2, characterized in that: The sealing member (60) is arranged between the side of the sealing portion (41) facing away from the center of the driving disc (40) and the inner wall of the valve body (10) and the valve cover (20).

4. A valve cut-off structure according to claim 1, characterized in that: A wear-resistant part (70) is provided between the valve body (10), the drive disc (40), the valve flap (50), and the valve cover (20).

5. A valve cut-off structure according to claim 4, characterized in that: The wear-resistant part (70) is a polytetrafluoroethylene strip.

6. The valve cut-off structure according to claim 1, characterized in that: A groove (51) is provided on one side of the valve flap (50), and a convex strip (52) is provided on the other side. The convex strip (52) of one valve flap (50) is slidably inserted into the groove (51) of the adjacent valve flap (50).

7. The valve cut-off structure according to claim 1, characterized in that: The transmission structure comprises a transmission column (53), the driving disc (40) is provided with an arc-shaped groove (42) extending in an involute, and the transmission column (53) is inserted into the arc-shaped groove (42).

8. The valve cut-off structure according to claim 1, characterized in that: The inner wall of the valve body (10) is provided with a linear groove (11), the opening (30) is a circular opening, the linear groove (11) extends along the tangential direction of the circular opening, and a side surface of the valve flap (50) is provided with a key-shaped boss (54) and a cylindrical boss (55), and the key-shaped boss (54) and the cylindrical boss (55) are both slidably connected in the linear groove (11).

9. The valve cut-off structure according to claim 8, characterized in that: The key-shaped boss (54) is located close to another adjacent valve flap (50), and the cylindrical boss (55) is arranged at the center of the valve flap (50).

10. The valve cut-off structure according to claim 1, characterized in that: A gear drive structure (80) is provided in the valve body (10) and the valve cover (20), a gear ring (43) is provided on the peripheral side of the drive disc (40), and the gear drive structure (80) is meshed with the gear ring (43).

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