Lifting sealing valve seat of eccentric semi-ball valve

Abstract

The utility model belongs to the field of valves, and particularly discloses an eccentric semi-ball valve lifting sealing valve seat which comprises a valve seat body and a supporting beam plate, the supporting beam plate is detachably connected to the valve seat body, the supporting beam plate is of a multi-section detachable connecting structure, and the two ends of the supporting beam plate are inserted into the inner wall of the valve seat body. According to the valve seat, the supporting beam plate on the valve seat body is of a multi-section detachable connecting structure, so that the supporting beam plate can be taken out in a segmented mode after being detached, interference between the supporting beam plate and the valve body is avoided during detachment, detachment is more convenient, and the detachment efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of valves, and more specifically, relates to a lifting and sealing valve seat for an eccentric semi-spherical valve. Background Art

[0002] Eccentric semi-spherical valves are commonly used in pipelines for transporting media such as liquids or gases to cut off, distribute, and change the flow rate and direction of the media. The closing member of an eccentric semi-spherical valve is a semi-spherical valve flap, and the valve is opened or closed by rotating the semi-spherical valve flap.

[0003] The utility model patent with the application number 202320972937.X discloses an eccentric semi-spherical valve, which includes a valve body, a valve shaft, and a semi-spherical valve flap. The semi-spherical valve flap is located in the valve cavity and is provided with a first seal on it; the valve shaft passes through the first valve port and is connected to the semi-spherical valve flap to drive the semi-spherical valve flap to rotate to open and close the eccentric semi-spherical valve; a valve cover is provided at the outer end of the second valve port, and a liftable sealing valve seat is provided inside it. The liftable sealing valve seat includes a support beam plate. After the eccentric semi-spherical valve is fully opened, the support beam plate is driven by a driving member to drive the entire liftable sealing valve seat to descend and abut against the outer side surface of the semi-spherical valve flap for sealing, thereby forming a sealed pressure chamber between the valve cover and the semi-spherical valve flap; there is no fluid medium in the sealed pressure chamber, and the first seal is located in this sealed pressure chamber, and the first seal can be removed from the opened sealed pressure chamber. During the disassembly process, the eccentric semi-spherical valve can still continue to work. However, when replacing the sealing ring of the first seal, it is necessary to first remove the support beam plate. The sealing valve seat and the support beam plate are connected by bolts. Due to the limited space inside the valve cavity, it is inconvenient to operate when disassembling and installing the support beam plate, and the support beam plate has a long structure and is prone to interference with the valve body, making it inconvenient to take out. Utility Model Content

[0004] Aiming at the defects of the prior art, this application provides a lifting and sealing valve seat for an eccentric semi-spherical valve, aiming to solve the problem that the support beam plate in the existing liftable sealing valve seat is inconvenient for disassembly and assembly.

[0005] A lifting and sealing valve seat for an eccentric semi-spherical valve provided by this application specifically includes a valve seat body and a support beam plate. The support beam plate is detachably connected to the valve seat body, and the support beam plate is a multi-section detachable connection structure, and both ends of the support beam plate are inserted into the inner wall of the valve seat body.

[0006] Through the above technical solutions conceived by this application, compared with the prior art, since the support beam plate on the valve seat body of the liftable sealing valve seat in this application adopts a multi-section detachable connection structure, the support beam plate can be disassembled and taken out in sections. After the middle section of the support beam plate is disassembled and taken out, its two ends can be directly taken out. After the support beam plate is divided into shorter small sections, there will be no interference with the valve body during disassembly and assembly, and the disassembly and assembly are more convenient, improving the disassembly and assembly efficiency.

[0007] As a further preference, the supporting beam plate includes a central connection block and two connection plates, and the two connection plates are respectively detachably connected to two ends of the central connection block.

[0008] By adopting the above technical solution, the two connection plates are symmetrically connected to two ends of the central connection block, so that the integrity of the supporting beam plate is better. When driving the central connection block, the two connection plates are uniformly stressed and can drive the valve seat body to move stably.

[0009] As a further preference, first clamping grooves are respectively formed on one sides of the two connection plates close to each other, second clamping grooves are respectively formed at two ends of the central connection block, and the first clamping grooves and the second clamping grooves are in clamping fit.

[0010] By adopting the above technical solution, after the central connection block and the two connection plates are connected, the second clamping grooves on the central connection block and the first clamping grooves are clamped with each other, thereby improving the installation stability between the central connection block and the connection plates.

[0011] As a further preference, first mounting holes are respectively formed at two ends of the central connection block, second mounting holes corresponding to the first mounting holes are formed on the connection plates, and the central connection block and the connection plates are fixed by a threaded locking member passing through the first mounting holes and the second mounting holes.

[0012] By adopting the above technical solution, the central connection block and the connection plates at two ends are connected and fixed by a threaded locking member, and the structure is simple and the connection and installation are more convenient.

[0013] As a further preference, the threaded locking member includes a screw and a first nut which are in threaded connection and adapted, and the first nut is fixedly connected to the connection plate and is coaxially arranged with the second mounting hole.

[0014] By adopting the above technical solution, after the screw passes through the first mounting hole and the second mounting hole, it is in threaded connection with the first nut. Since the first nut is fixedly connected to the connection plate, the installation of the screw is more convenient.

[0015] As a further preference, a plug-in portion is fixedly connected to one end of the connection plate far away from the central connection block, and two plug-in grooves for plugging the plug-in portion are formed on the inner wall of the valve seat body.

[0016] By adopting the above technical solution, when the connection plate is installed, the plug-in portion is plugged into the plug-in groove on the valve seat body, thereby completing the connection between the connection plate and the valve seat body, and the installation efficiency is high and there is no interference with the valve body.

[0017] As a further preference, the minimum distance between the two plug-in grooves is less than the length of the supporting beam plate, and the maximum distance between the two plug-in grooves is not less than the length of the supporting beam plate.

[0018] By adopting the above technical solution, the length of the supporting beam plate can ensure that both ends thereof are located within the insertion slots, so that the valve seat body can be driven to move by the supporting beam plate, and the supporting beam plate and the valve seat body will not be separated from each other.

[0019] As a further preference, an installation groove for placing a second nut is formed on the central connection block, and the second nut cooperates with the valve rod to drive the central connection block and the connecting plate to drive the valve seat body to move.

[0020] By adopting the above technical solution, the second nut is installed in the installation groove, and the second nut cooperates with the valve rod to drive the central connection block and the connecting plate to drive the valve seat body to move, so that the cooperation between the second nut and the valve rod is more stable, and further it is convenient to drive the valve seat body to move through the valve rod.

[0021] As a further preference, reinforcing ribs are fixedly connected to both the central connection block and the two connecting plates.

[0022] By adopting the above technical solution, the arrangement of the reinforcing ribs improves the strength of the central connection block and the two connecting plates, and further improves the overall strength of the supporting beam plate, and can stably drive the valve seat body to move under the drive of the valve rod.

[0023] As a further preference, a plurality of insertion holes for inserting the positioning rods are arranged around the valve seat body in a surrounding manner, and the valve seat body cooperates with the positioning rods to move along its axial direction.

[0024] By adopting the above technical solution, the positioning rods on the valve body are inserted into the insertion holes on the valve seat body, so as to guide and limit the movement of the valve seat body and improve the stability of the movement of the valve seat body.

[0025] Generally speaking, compared with the prior art, the above technical solution conceived by the present application mainly has the following technical advantages:

[0026] 1. In the present application, the supporting beam plate on the valve seat body adopts a multi-section detachable connection structure, so that the supporting beam plate can be disassembled and taken out in sections. And since both ends of the supporting beam plate are inserted into the inner wall of the valve seat body, when the middle section of the supporting beam plate is disassembled and taken out, its two ends can be directly taken out, and sectional installation can also be adopted during installation. After the supporting beam plate is divided into shorter small sections, there will be no interference with the valve body during disassembly and assembly, and the disassembly and assembly are more convenient, improving the disassembly and assembly efficiency.

[0027] 2. After the central connection block and the two connecting plates are connected in the present application, the second card slot on the central connection block is mutually clamped with the first card slot, achieving the effect of mutual abutment, thereby improving the installation stability between the central connection block and the connecting plate.

[0028] 3. Pass the screw through the first mounting hole and the second mounting hole and then thread-connect it with the first nut to realize the connection and fixation between the connecting plate and the central connecting block. Since the first nut is fixedly connected to the connecting plate, it is more convenient to install the screw. Brief Description of the Drawings

[0029] Figure 1 is a schematic diagram of the overall structure of the lifting and sealing valve seat provided by the embodiment of the present application;

[0030] Figure 2 is Figure 1 a schematic cross-sectional view along line A-A;

[0031] Figure 3 is a schematic diagram of the unfolded structure of the support beam plate provided by the embodiment of the present application.

[0032] In all the drawings, the same reference numerals are used to represent the same elements or structures, where:

[0033] 1. Valve seat body; 11. Insertion groove; 12. Insertion hole; 2. Support beam plate; 21. Central connecting block; 211. Second card slot; 212. First mounting hole; 213. Mounting groove; 22. Connecting plate; 221. First card slot; 222. Second mounting hole; 223. Insertion part; 23. Thread locking part; 231. Screw; 232. First nut; 24. Reinforcing rib. Detailed Embodiment

[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] Refer to Figures 1-3 , an eccentric semi-spherical valve lifting and sealing valve seat disclosed in the present application is arranged in the valve body of the eccentric semi-spherical valve and can be lifted under the drive of the valve stem. When the semi-spherical valve flap of the eccentric semi-spherical valve rotates to fully open the valve, the valve stem drives the lifting and sealing valve seat to abut and seal with the semi-spherical valve flap, so as to facilitate the on-line replacement of the seal on the semi-spherical valve flap. It includes a valve seat body 1 and a support beam plate 2. The support beam plate 2 is detachably connected to the valve seat body 1. Before replacing the seal on the semi-spherical valve flap, the support beam plate 2 on the valve seat body 1 needs to be removed. In this embodiment, the support beam plate 2 is a multi-section detachable connection structure. The two ends of the support beam plate 2 are inserted into the inner wall of the valve seat body 1. Since the support beam plate 2 is divided into shorter sections, the support beam plate 2 will not interfere with the valve body during disassembly and assembly, and the disassembly and assembly are more convenient, improving the disassembly and assembly efficiency.

[0036] Specifically, a plurality of positioning rods are provided on the valve body of the eccentric semi-spherical valve. The positioning rods are in the same axial direction as the valve seat body 1. A plurality of insertion holes 12 for inserting the positioning rods are arranged around the valve seat body 1. The valve seat body 1 cooperates with the positioning rods to move along its axial direction, so that when the valve seat body 1 descends to the lowest position, it can abut and seal with the semi-spherical valve flap.

[0037] In this embodiment, the support beam plate 2 includes a central connection block 21 and two connection plates 22. The two connection plates 22 are respectively detachably connected to both ends of the central connection block 21. Reinforcing ribs 24 are fixedly connected to both the central connection block 21 and the two connection plates 22, thereby improving the overall structural strength of the support beam plate 2. To facilitate the connection between the connection plate 22 and the valve seat body 1, a plug-in portion 223 is fixedly connected to the end of the connection plate 22 away from the central connection block 21. Two plug-in slots 11 for inserting the plug-in portion 223 are provided on the inner wall of the valve seat body 1. The two plug-in slots 11 are symmetrically arranged with the axis of the valve seat body 1 as the symmetry line. The minimum distance between the two plug-in slots 11 is less than the length of the support beam plate 2, and the maximum distance between the two plug-in slots 11 is not less than the length of the support beam plate 2, so that both ends of the support beam plate 2 can be inserted into the two plug-in slots 11 respectively after installation; the two connection plates 22 are located on the same straight line after installation. When the central connection block 21 is disassembled, the two connection plates 22 are respectively removed to complete the disassembly of the support beam plate 2; when installing the support beam plate 2, first install the two connection plates 22, and then connect the central connection block 21 between the two connection plates 22.

[0038] Further, first card slots 221 are respectively provided above the sides of the two connection plates 22 close to each other, and second card slots 211 are respectively provided below both ends of the central connection block 21. The first card slots 221 are in snap-fit with the second card slots 211. The central connection block 21 is convenient to be installed between the two connection plates 22 from above, and the second card slots 211 on the central connection block 21 are snap-connected with the first card slots 221, thereby improving the installation stability between the central connection block 21 and the connection plate 22.

[0039] Furthermore, first installation holes 212 are respectively provided at both ends of the central connection block 21 in the vertical direction, and second installation holes 222 are provided on the connection plate 22 in the vertical direction and corresponding to the first installation holes 212. The central connection block 21 and the connection plate 22 are fixed by a threaded locking member 23 passing through the first installation hole 212 and the second installation hole 222. Specifically, the threaded locking member 23 includes a screw 231 and a first nut 232 that are threadedly connected and adapted. The first nut 232 is fixedly connected in the second installation hole 222 and is coaxially arranged with the second installation hole 222. The screw 231 passes through the first installation hole 212 and the second installation hole 222 and is threadedly connected to the first nut 232, and the screw 231 is more convenient to install.

[0040] In this embodiment, an installation groove 213 for placing a second nut is further formed in the middle of the central connection block 21. The second nut cooperates with the valve stem to drive the central connection block 21 and the connection plate 22 to drive the valve seat body 1 to move. Specifically, the valve stem is vertically arranged, passes through the second nut and the central connection block 21 and is threadedly connected to the second nut. By rotating the valve stem, the movement of the valve seat body 1 is realized.

[0041] It should be understood that expressions such as "including" and "may include" used in this application indicate the existence of disclosed functions, operations, or constituent elements, and do not limit the existence of one or more additional functions, operations, and constituent elements. In this application, terms such as "including" and / or "having" can be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or a combination thereof, but cannot be interpreted as excluding the existence or possibility of addition of one or more other characteristics, numbers, operations, constituent elements, components, or a combination thereof.

[0042] It should be understood that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to this application.

[0043] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, terms such as "install", "connect", "connection", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0045] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An eccentric hemispherical valve lifting sealing valve seat, characterized in that: It comprises a valve seat body (1) and a support beam plate (2), wherein the support beam plate (2) is detachably connected to the valve seat body (1), the support beam plate (2) is a multi-section detachable connection structure, and the two ends of the support beam plate (2) are plugged into the inner wall of the valve seat body (1).

2. The lifting sealing valve seat of an eccentric hemispherical valve according to claim 1, characterized in that: The supporting beam plate (2) comprises a central connecting block (21) and two connecting plates (22), wherein the two connecting plates (22) are respectively detachably connected to two ends of the central connecting block (21).

3. The lifting sealing valve seat of an eccentric hemispherical valve as claimed in claim 2, characterized in that: A first card slot (221) is provided on one side of the two connecting plates (22) close to each other, and a second card slot (211) is provided on both ends of the central connecting block (21), and the first card slot (221) is card-connected and adapted to the second card slot (211).

4. The lifting sealing valve seat of an eccentric hemispherical valve as claimed in claim 3, characterized in that: Both ends of the central connecting block (21) are provided with first mounting holes (212), and the connecting plate (22) is provided with second mounting holes (222) corresponding to the first mounting holes (212). A threaded locking member (23) passes through the first mounting holes (212) and the second mounting holes (222) to fix the central connecting block (21) and the connecting plate (22).

5. The lifting sealing valve seat of an eccentric hemispherical valve as claimed in claim 4, characterized in that: The threaded locking member (23) comprises a threadedly adapted screw (231) and a first nut (232); the first nut (232) is fixedly connected to the connecting plate (22) and is coaxially arranged with the second mounting hole (222).

6. The lifting sealing valve seat of an eccentric hemispherical valve as claimed in claim 2, characterized in that: An end of the connection plate (22) away from the central connection block (21) is fixedly connected with a plug-in portion (223), and the inner wall of the valve seat body (1) is provided with two plug-in grooves (11) for plugging the plug-in portion (223).

7. The lifting sealing valve seat of an eccentric hemispherical valve as claimed in claim 6, characterized in that: The minimum distance between the two plug-in slots (11) is less than the length of the support beam plate (2), and the maximum distance between the two plug-in slots (11) is not less than the length of the support beam plate (2).

8. An eccentric hemispherical valve lifting sealing valve seat as claimed in any one of claims 2 to 7, characterized in that: The central connecting block (21) is provided with a mounting groove (213) for accommodating a second nut, and the second nut cooperates with the valve stem to drive the central connecting block (21) and the connecting plate (22) to drive the valve seat body (1) to move.

9. An eccentric hemispherical valve lifting sealing valve seat as claimed in any one of claims 2 to 7, characterized in that: The central connecting block (21) and the two connecting plates (22) are both fixedly connected with reinforcing ribs (24).

10. An eccentric hemispherical valve lifting sealing valve seat according to any one of claims 1 to 7, characterized in that: The valve seat body (1) is surrounded by a plurality of insertion holes (12) for inserting the positioning rod, and the valve seat body (1) cooperates with the positioning rod to move along the axial direction thereof.

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