Rubber valve seat of elastic sealing butterfly valve

Abstract

The rubber valve seat of the elastic sealing butterfly valve comprises a main valve seat body and a valve plate, the surface of the main valve seat body is fixedly connected with a sealing ring, a sealing groove is correspondingly formed in the position, opposite to the sealing ring, of the surface of an auxiliary valve seat body, through holes are formed in the two ends of the main valve seat body and the two ends of the auxiliary valve seat body, and sealing layers are fixedly connected into the through holes. Meanwhile, the main valve seat is fixedly connected with the auxiliary valve seat through screws, the inner side faces of the main valve seat and the auxiliary valve seat are fixedly connected with limiting plates, the valve plate is movably connected into the main valve seat and the auxiliary valve seat through a valve rod, the valve rod is movably connected into a through hole, the outer side face of the valve plate is fixedly connected with a sealing ring, and the edge of the surface of the valve plate is fixedly connected with a positioning ring; and one side of the limiting plate opposite to the valve plate is fixedly connected with a sealing gasket. Through the cooperation of the main valve seat, the auxiliary valve seat, the limiting plate, the sealing gasket and the sealing ring, the disassembly efficiency of the valve seat can be enhanced, and the sealing performance between the valve seat and the valve plate can be enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a rubber valve seat of an elastic sealing butterfly valve. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure that can be used to control the flow of various types of fluids such as air, water and steam. When the butterfly valve is in use, the flap is driven to rotate by a rotating mechanism, and the opening and closing of the butterfly valve are controlled by the contact and separation of the valve plate and the valve seat; the butterfly valve seat is usually directly fixed in the butterfly valve. As the valve plate rotates, the outer side of the valve plate and the butterfly valve seat are constantly rubbed, which will cause the surface of the butterfly valve seat to wear. However, the valve seat of a traditional butterfly valve is mostly a single-layer sealing structure, which is very prone to leakage after wear, and then the switching function of the butterfly valve will gradually fail. After the traditional butterfly valve seat is worn, the butterfly valve is usually removed directly, and the valve seat is removed for corresponding component replacement or repair. However, the valve seat in the butterfly valve is difficult to remove conveniently due to the interaction between the valve plate and the valve stem, and multiple components need to be removed additionally, thereby reducing the efficiency of disassembly of the valve seat. Utility Model Content

[0003] In order to overcome the defects of the prior art, a rubber valve seat of an elastic sealing butterfly valve is provided to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, a rubber valve seat of an elastic sealing butterfly valve is provided, comprising: a main valve seat and a valve plate, wherein the surface of the main valve seat is fixedly connected to a sealing ring, and a sealing groove is provided on the surface of the auxiliary valve seat corresponding to the position of the sealing ring, and through holes are provided at both ends of the main valve seat and the auxiliary valve seat, and a sealing layer is fixedly connected in the through holes, and at the same time, the main valve seat is fixedly connected to the auxiliary valve seat by screws, and the inner sides of the main valve seat and the auxiliary valve seat are fixedly connected to a limit plate, and the valve plate is movably connected to the inside of the main valve seat and the auxiliary valve seat through a valve stem, and the valve stem is movably connected in the through hole, and the outer side of the valve plate is fixedly connected to the sealing ring, and the edge of the valve plate surface is fixedly connected to a positioning ring, and at the same time, the side of the limit plate opposite to the valve plate is fixedly connected to a sealing gasket.

[0005] Preferably, the main valve seat and the auxiliary valve seat are combined together to form the valve seat body, and the main valve seat and the auxiliary valve seat are both in a circular ring structure, and four groups of interlocking holes are symmetrically opened on the surface of the main valve seat, and the axial cross-section of the four groups of interlocking holes is in a convex structure, and screw holes are opened on the surface of the auxiliary valve seat corresponding to the positions of the interlocking holes, and the screws pass through the interlocking holes and are screwed in the screw holes.

[0006] Preferably, the main valve seat surface is symmetrically connected to two groups of sealing rings, both of which are fan-shaped structures, and the middle of the two groups of sealing ring surfaces are respectively fixedly connected to a group of positioning rods, which are cylindrical in structure, and the fitting holes pass through the corresponding positions of the sealing rings.

[0007] Preferably, the engaging groove provided on the surface of the auxiliary valve seat is in a circular ring structure, and the sizes of the engaging groove and the sealing ring are matched, and the screw hole is provided in the engaging groove, and a group of seals are fixedly connected to the side surfaces of the engaging groove respectively, and the two groups of seals are in a fan-shaped ring structure. At the same time, a positioning hole is provided in the engaging groove corresponding to the position relative to the positioning rod.

[0008] Preferably, the sealing layer is in a semicircular ring structure, the size of the inner side of the sealing layer matches the size of the valve stem, and a group of limit plates fixedly connected in the main valve seat and a group of limit plates fixedly connected in the auxiliary valve seat are distributed symmetrically around the center.

[0009] Preferably, the limit plate is in a fan-shaped ring structure, and the sealing gasket fixedly connected to the surface of the limit plate is in a fan-shaped ring structure, and the sizes of the limit plate and the sealing gasket are adapted, and the side of the sealing gasket away from the limit plate fits the surface of the valve plate.

[0010] Preferably, the valve plate has a circular structure, and the sealing ring fixedly connected to the arc surface of the valve plate has a circular ring structure, the outer diameter of the sealing ring and the inner diameter of the valve seat body are matched in size, and the axial cross-section of the sealing ring is a convex structure. At the same time, the two sets of positioning rings fixedly connected on both sides of the valve plate are both circular ring structures, and the cross-section of the positioning ring is a semicircular structure.

[0011] Compared with the prior art, the beneficial effects of the utility model are: through the cooperation of the limit plate, sealing gasket, positioning ring and sealing ring, the connection between the valve plate and the valve seat body has multiple sealing structures, and the sealing surface directions of each sealing structure are different, so the sealing effect of the valve seat body can be effectively enhanced. Even if a certain sealing structure is worn, leakage problems will not occur. At the same time, through the cooperation of the main valve seat, auxiliary valve seat, screws and sealing rings, when the valve seat body needs to be disassembled, the main valve seat and the auxiliary valve seat can be quickly removed from the two ends of the butterfly valve without disassembling other irrelevant components, thereby reducing the difficulty of disassembling the valve seat body and improving the efficiency of disassembling the valve seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a front view schematic diagram of an embodiment of the utility model.

[0013] Figure 2 It is a side view schematic diagram of an embodiment of the utility model.

[0014] Figure 3 It is a top view schematic diagram of an embodiment of the utility model.

[0015] Figure 4 It is a partial cross-sectional structural schematic diagram of an embodiment of the utility model.

[0016] In the figure: 1. main valve seat; 2. sealing ring; 3. sealing ring; 4. positioning ring; 5. valve plate; 6. positioning rod; 7. sealing gasket; 8. fitting hole; 9. sealing layer; 10. valve stem; 11. screw; 12. limit plate; 13. through hole; 14. auxiliary valve seat; 15. sealing groove. DETAILED DESCRIPTION

[0017] Reference Figures 1 to 4 As shown, the utility model provides a rubber valve seat of an elastic sealing butterfly valve, comprising: a main valve seat 1 and a valve plate 5, wherein the surface of the main valve seat 1 is fixedly connected to a sealing ring 2, and a sealing groove 15 is provided on the surface of the auxiliary valve seat 14 corresponding to the position of the sealing ring 2, and through holes 13 are provided at both ends of the main valve seat 1 and the auxiliary valve seat 14, and a sealing layer 9 is fixedly connected in the through hole 13, and the main valve seat 1 is fixedly connected to the auxiliary valve seat 14 by screws 11, and the inner sides of the main valve seat 1 and the auxiliary valve seat 14 are fixedly connected to a limit plate 12, the valve plate 5 is movably connected to the inside of the main valve seat 1 and the auxiliary valve seat 14 through a valve stem 10, and the valve stem 10 is movably connected in the through hole 13, and the outer side of the valve plate 5 is fixedly connected to the sealing ring 3, and the edge of the surface of the valve plate 5 is fixedly connected to the positioning ring 4, and at the same time, the side of the limit plate 12 opposite to the valve plate 5 is fixedly connected to the sealing gasket 7.

[0018] In this embodiment, when the valve seat body is used, the valve plate 5 is first installed inside the butterfly valve housing through the valve stem 10, and then the main valve seat 1 and the auxiliary valve seat 14 are embedded from both ends of the butterfly valve housing, and the main valve seat 1 and the auxiliary valve seat 14 are rotated respectively, so that the through holes 13 opened in the main valve seat 1 and the auxiliary valve seat 14 can face the valve stem 10, so that the surface of the valve stem 10 can abut against the sealing layer 9 set in the through hole 13, thereby enhancing the sealing performance of the two sets of contact surfaces, and the sealing ring 2 will also be embedded in the sealing groove 1 synchronously. 5. When the screw 11 is inserted into the fitting hole 8 and threadedly connected to the threaded hole, the main valve seat 1 and the auxiliary valve seat 14 are fixedly connected. At this time, the limit plate 12 will abut the surface of the valve plate 5 through the sealing gasket 7, and the sealing ring 3 on the outer side of the valve plate 5 will abut the inner side of the valve seat body. At the same time, the positioning ring 4 will also synchronously squeeze the surface of the sealing gasket 7, so that a multiple sealing structure can be formed between the valve seat body and the valve plate 5, thereby enhancing the sealing effect of the valve seat body and also helping to improve the loading and unloading efficiency of the valve seat body.

[0019] As a preferred embodiment, the main valve seat 1 and the auxiliary valve seat 14 are combined together to form the valve seat body, and the main valve seat 1 and the auxiliary valve seat 14 are both in a circular ring structure, and four groups of embedding holes 8 are symmetrically opened on the surface of the main valve seat 1, and the axial cross-section of the four groups of embedding holes 8 is a convex structure, and screw holes are opened on the surface of the auxiliary valve seat 14 corresponding to the positions of the embedding holes 8, and the screws 11 pass through the embedding holes 8 and are screwed in the screw holes.

[0020] In this embodiment, if Figure 2 , Figure 3 and Figure 4 The provision of the fitting hole 8 and the screw hole enables convenient assembly and disassembly between the main valve seat 1 and the auxiliary valve seat 14, thereby improving the efficiency of assembling or disassembling the main valve seat 1 and the auxiliary valve seat 14 inside the butterfly valve housing.

[0021] As a preferred embodiment, two groups of sealing rings 2 are symmetrically connected to the surface of the main valve seat 1, and both groups of sealing rings 2 are fan-shaped structures, and a group of positioning rods 6 are fixedly connected to the middle of the surfaces of the two groups of sealing rings 2 respectively, and the positioning rods 6 are cylindrical in structure, and the mating holes 8 pass through the corresponding positions of the sealing rings 2.

[0022] In this embodiment, if Figure 2 and Figure 4 The setting of the sealing ring 2 can help enhance the sealing effect at the connection surface between the main valve seat 1 and the auxiliary valve seat 14, and the setting of the positioning rod 6 can help quickly complete the positioning between the main valve seat 1 and the auxiliary valve seat 14, thereby reducing the probability of misalignment between the main valve seat 1 and the auxiliary valve seat 14.

[0023] As a preferred embodiment, the mating groove opened on the surface of the auxiliary valve seat 14 is in a circular ring structure, and the sizes of the mating groove and the sealing ring 2 are matched, and the screw hole is opened in the mating groove, and a group of seals are fixedly connected to the side surfaces of the mating groove respectively, and the two groups of seals are in a fan-shaped structure. At the same time, a positioning hole is opened in the mating groove corresponding to the position relative to the positioning rod 6.

[0024] In this embodiment, if Figure 1 , Figure 2 and Figure 4 The sealing member is made of soft rubber material, which can help enhance the sealing performance of the connection between the main valve seat 1 and the auxiliary valve seat 14, and the axial cross-section of the sealing ring 2 is an isosceles trapezoidal structure, which can help reduce the difficulty of embedding the sealing ring 2 into the fitting groove.

[0025] As a preferred embodiment, the sealing layer 9 has a semicircular ring structure, and the size of the inner side of the sealing layer 9 is compatible with the size of the valve stem 10, and a group of limit plates 12 fixedly connected in the main valve seat 1 and a group of limit plates 12 fixedly connected in the auxiliary valve seat 14 are distributed symmetrically with the center.

[0026] In this embodiment, if Figure 1 , Figure 2 and Figure 4 The sealing layer 9 is made of soft rubber material, which can help enhance the sealing of the connection between the valve seat body and the valve stem 10. At the same time, the position distribution of the limit plate 12 can facilitate the rotation of the valve plate 5, limit the rotation range of the valve plate 5, and help enhance the sealing of the connection between the valve plate 5 and the valve seat body.

[0027] As a preferred embodiment, the limit plate 12 is in a fan-shaped ring structure, and the sealing gasket 7 fixedly connected to the surface of the limit plate 12 is in a fan-shaped ring structure, and the sizes of the limit plate 12 and the sealing gasket 7 are adapted, and the side of the sealing gasket 7 away from the limit plate 12 fits the surface of the valve plate 5.

[0028] In this embodiment, if Figure 1 , Figure 2 and Figure 3 The sealing gasket 7 is made of soft rubber material, which can help enhance the fit between the sealing gasket 7 and the surface of the valve plate 5, enhance the sealing effect between the valve plate 5 and the sealing gasket 7, and effectively reduce the probability of wear of the sealing gasket 7.

[0029] As a preferred embodiment, the valve plate 5 has a circular structure, and the sealing ring 3 fixedly connected to the arc surface of the valve plate 5 has a circular ring structure, the outer diameter of the sealing ring 3 is matched with the inner diameter of the valve seat body, and the axial cross-section of the sealing ring 3 is a convex structure. At the same time, the two sets of positioning rings 4 fixedly connected on both sides of the valve plate 5 are both circular ring structures, and the cross-section of the positioning ring 4 is a semicircular structure.

[0030] In this embodiment, if Figure 1 and Figure 3 The setting of the positioning ring 4 can further enhance the sealing performance of the connection between the valve plate 5 and the sealing gasket 7, and the sealing ring 3 is made of soft rubber material, which not only facilitates the rotation of the valve plate 5, but also can assist in enhancing the sealing effect of the connection between the valve plate 5 and the valve seat body.

[0031] The rubber valve seat of the elastic sealing butterfly valve of the utility model can enhance the disassembly efficiency of the valve seat and the sealing between the valve seat and the valve plate 5 through the cooperation of the main valve seat 1, the auxiliary valve seat 14, the limit plate 12, the sealing gasket 7 and the sealing ring 3, and through the setting of multiple sealing structures, the probability of leakage of the valve seat due to wear of a certain layer of the sealing structure can be effectively reduced.

Claims

1. A rubber valve seat for an elastic sealing butterfly valve, comprising: A main valve seat (1) and a valve plate (5), characterized in that: the surface of the main valve seat (1) is fixedly connected to a sealing ring (2), and a sealing groove (15) is provided on the surface of the auxiliary valve seat (14) corresponding to the position of the sealing ring (2), and through holes (13) are provided at both ends of the main valve seat (1) and the auxiliary valve seat (14), and a sealing layer (9) is fixedly connected in the through hole (13), and at the same time, the main valve seat (1) is fixedly connected to the auxiliary valve seat (14) by screws (11), and the main valve seat (1 ) and the inner side surfaces of the auxiliary valve seat (14) are fixedly connected to the limit plate (12), the valve plate (5) is movably connected to the inside of the main valve seat (1) and the auxiliary valve seat (14) through the valve stem (10), and the valve stem (10) is movably connected in the through hole (13), and the outer side surface of the valve plate (5) is fixedly connected to the sealing ring (3), and the edge of the surface of the valve plate (5) is fixedly connected to the positioning ring (4), and at the same time, the limit plate (12) is fixedly connected to the sealing gasket (7) on the side opposite to the valve plate (5).

2. The rubber valve seat of an elastic sealing butterfly valve according to claim 1, characterized in that: The main valve seat (1) and the auxiliary valve seat (14) are combined together to form a valve seat body, and the main valve seat (1) and the auxiliary valve seat (14) are both in an annular structure, and four groups of interlocking holes (8) are symmetrically provided on the surface of the main valve seat (1), and the axial cross-section of the four groups of interlocking holes (8) is in a convex-shaped structure, and screw holes are provided on the surface of the auxiliary valve seat (14) at positions corresponding to the interlocking holes (8), and the screws (11) pass through the interlocking holes (8) and are screwed in the screw holes.

3. The rubber valve seat of an elastic sealing butterfly valve according to claim 1, characterized in that: The surface of the main valve seat (1) is symmetrically connected to two groups of sealing rings (2), and both groups of sealing rings (2) are in a fan-shaped structure. The middle of the surface of the two groups of sealing rings (2) is respectively fixedly connected to a group of positioning rods (6), and the positioning rods (6) are in a cylindrical structure. The fitting holes (8) penetrate the corresponding positions of the sealing rings (2).

4. The rubber valve seat of an elastic sealing butterfly valve according to claim 1, characterized in that: The engaging groove provided on the surface of the auxiliary valve seat (14) is in the form of a circular ring structure, and the sizes of the engaging groove and the sealing ring (2) are matched, and the screw hole is provided in the engaging groove, and a group of sealing members are fixedly connected to the side surfaces of the engaging groove on both sides, and both groups of sealing members are in the form of a fan-shaped ring structure, and a positioning hole is provided in the engaging groove corresponding to the position relative to the positioning rod (6).

5. The rubber valve seat of an elastic sealing butterfly valve according to claim 1, characterized in that: The sealing layer (9) is in the form of a semicircular ring structure, the size of the inner side of the sealing layer (9) is matched with the size of the valve stem (10), and a group of limit plates (12) fixedly connected to the main valve seat (1) and a group of limit plates (12) fixedly connected to the auxiliary valve seat (14) are distributed symmetrically with respect to the center.

6. The rubber valve seat of an elastic sealing butterfly valve according to claim 1, characterized in that: The limit plate (12) is in the form of a fan-shaped ring structure, and the sealing gasket (7) fixedly connected to the surface of the limit plate (12) is in the form of a fan-shaped ring structure, and the sizes of the limit plate (12) and the sealing gasket (7) are adapted to each other, and the side of the sealing gasket (7) away from the limit plate (12) is in contact with the surface of the valve plate (5).

7. The rubber valve seat of an elastic sealing butterfly valve according to claim 1, characterized in that: The valve plate (5) is of circular structure, and the sealing ring (3) fixedly connected to the arc surface of the valve plate (5) is of an annular structure. The outer diameter of the sealing ring (3) is matched to the inner diameter of the valve seat body, and the axial cross section of the sealing ring (3) is of a convex structure. At the same time, the two sets of positioning rings (4) fixedly connected on both sides of the valve plate (5) are both of annular structure, and the cross section of the positioning ring (4) is of a semicircular structure.

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