Valve seat convenient to maintain

Abstract

The utility model discloses a valve seat convenient to maintain, relates to the technical field of valve seats, and solves the problems that an opening and closing plate in an existing valve seat rotates to be attached to the valve seat for blocking, but after repeated use and excessive contact frequency of the opening and closing plate and the valve seat, a butterfly seat is abraded, so that the sealing effect between the opening and closing plate and the butterfly seat becomes poor, and the service life of the valve seat is prolonged. The service life of the valve seat is shortened, and great troubles are brought to people. Comprising a valve seat body, sealing notches are formed in the two sides of the valve seat body, and sealing rubber rings are arranged in the sealing notches; the mounting block is arranged on the side face of the valve seat body, positioning studs are arranged at the four corners of the side face of the mounting block, and each positioning stud is connected with a fastening cylinder part; the inflation extrusion ring is arranged on the inner wall surface of the valve seat body; according to the valve seat, extrusion sealing can be achieved, meanwhile, abrasion of the valve seat body caused by too much contact frequency of the opening and closing plate and the valve seat is effectively avoided, and therefore the service life of the opening and closing plate and the service life of the valve seat body are prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve seats, and in particular relates to a valve seat which is easy to maintain. Background Art

[0002] The butterfly valve, also known as the flap valve, is a simple regulating valve 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 valve core is driven to rotate by the rotating mechanism, and the opening and closing of the butterfly valve is controlled by the contact and separation of the valve core and the valve seat.

[0003] According to the patent publication number CN202971970U, a utility model patent for a valve seat for a butterfly valve includes an annular base and a first flange and a second flange symmetrically arranged at both ends of the annular base. The annular base is provided with a valve stem mounting hole passing through its radial center position. Since the valve seat adopts an integral rubber injection molding structure, it can be installed and disassembled through its elastic deformation. The two flanges at both ends of the annular base cooperate with the corresponding structure on the valve body to form axial positioning, thereby realizing the firm installation of the valve seat.

[0004] Although the valve seat of the above-mentioned equipment has the characteristics of easy disassembly and assembly, time-saving and labor-saving, after the opening and closing plate is installed inside the existing valve seat, the opening and closing plate is rotated to fit with the valve seat for blocking. However, after repeated use, the frequency of contact between the opening and closing plate and the valve seat is too high, which will cause the butterfly seat to wear, thereby causing the sealing effect between the opening and closing plate and the butterfly seat to deteriorate, reducing the service life of the valve seat, and causing great trouble to people.

[0005] Therefore, based on the above problems, we designed a valve seat that is easy to maintain. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a valve seat that is easy to maintain, which solves the technical problem that the opening and closing plate inside the existing valve seat rotates to fit the valve seat for blocking, but after repeated use, the frequency of contact between the opening and closing plate and the valve seat is too high, which will cause the butterfly seat to wear, thereby causing the sealing effect between the opening and closing plate and the butterfly seat to deteriorate, reducing the service life of the valve seat, and causing great trouble to people.

[0007] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the utility model, a valve seat that is easy to maintain is provided, comprising a valve seat body, both sides of the valve seat body are provided with sealing notches, and a sealing rubber ring is provided in the sealing notch;

[0008] It also includes: a mounting block, which is arranged on the side of the valve seat body, and positioning studs are arranged at the four corners of the side of the mounting block, and each positioning stud is connected to a fastening cylinder;

[0009] The inflatable extrusion ring is arranged on the inner wall surface of the valve seat body, and the inflatable port of the inflatable extrusion ring is arranged on the valve seat body.

[0010] A further improvement is that the inner diameter of the sealing rubber ring after being placed in the sealing groove is the same as the inner diameter of the valve seat body.

[0011] A further improvement is that the inner wall surface of the sealing notch is provided with circularly distributed positioning and mounting holes, and the sealing rubber ring is provided with a positioning protrusion at a position corresponding to each positioning and mounting hole.

[0012] A further improvement is that an axial groove is provided through the mounting block, and a side surface of the axial groove extends out of the valve seat body.

[0013] A further improvement is that the inner wall surface of each fastening cylinder is provided with an internal thread, and each fastening cylinder is threaded onto the positioning stud.

[0014] A further improvement is that a mounting groove is provided on the side of the mounting block, a gasket is provided in the mounting groove, and the inner diameter of the mounting groove is larger than the outer diameter of the shaft groove.

[0015] A further improvement is that the inner wall of the valve seat body is provided with a groove for installing the inflation extrusion ring.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) The utility model can effectively improve the connection sealing performance of the pipeline flange and the pneumatic actuator respectively through the design of the sealing notch, the sealing rubber ring, the mounting groove and the gasket.

[0018] (2) The utility model designs an inflatable extrusion pad between the opening and closing plate and the valve seat body. When the opening and closing plate is installed in the valve seat body, a certain amount of gas can be filled into the inflatable extrusion ring to allow the inflatable extrusion ring to expand and contact the opening and closing plate. While achieving extrusion sealing, it can effectively avoid the wear of the valve seat body caused by excessive contact between the opening and closing plate and the valve seat, thereby extending the service life of the opening and closing plate and the valve seat body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the utility model from top view;

[0021] Figure 3 It is a side view structural schematic diagram of the utility model;

[0022] Figure 4 It is a schematic diagram of the cross-sectional top view of the structure of the utility model.

[0023] Markings in the figure:

[0024] 1. Valve seat body; 11. Sealing notch; 111. Positioning mounting hole; 112. Positioning convex block; 12. Shaft groove; 13. Sealing rubber ring; 2. Washer; 3. Mounting block; 31. Positioning stud; 32. Fastening cylinder; 33. Groove; 34. Mounting groove; 4. Inflating extrusion ring; 41. Inflating port. DETAILED DESCRIPTION

[0025] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1 As shown, a valve seat that is easy to maintain includes a valve seat body 1, both sides of the valve seat body 1 are provided with sealing notches 11, and sealing rubber rings 13 are provided in the sealing notches 11;

[0027] The inner diameter of the sealing rubber ring 13 after being placed in the sealing notch 11 is the same as the inner diameter of the valve seat body 1. The sealing rubber ring 13 is used to improve the sealing performance after the valve seat body 1 is connected to the pipeline.

[0028] The inner wall surface of the sealing notch 11 is provided with circularly distributed positioning and mounting holes 111, and the sealing rubber ring 13 is provided with positioning protrusions 112 at positions corresponding to each positioning and mounting hole 111, and the positioning and mounting holes 111 and the positioning protrusions 112 are used for convenient installation of the sealing rubber ring 13;

[0029] like Figure 2 and Figure 3 As shown, it also includes: a mounting block 3, which is arranged on the side of the valve seat body 1, and positioning studs 31 are arranged at the four corners of the side of the mounting block 3, each positioning stud 31 is connected to a fastening cylinder 32, and the inner wall surface of each fastening cylinder 32 is provided with an internal thread, and each fastening cylinder 32 is screwed on the positioning stud 31, and a threaded connection is adopted, which is convenient for disassembly and assembly;

[0030] The mounting block 3 is provided with an axis groove 12, and the side of the axis groove 12 extends out of the valve seat body 1. When installing, the valve shaft is inserted into the axis groove 12;

[0031] The side of the mounting block 3 is provided with a mounting groove 34, a washer 2 is provided in the mounting groove 34, and the inner diameter of the mounting groove 34 is larger than the outer diameter of the shaft groove 12;

[0032] like Figure 4As shown, it also includes: an inflatable extrusion ring 4, which is arranged on the inner wall surface of the valve seat body 1, and an inflatable port 41 of the inflatable extrusion ring 4 is arranged on the valve seat body 1;

[0033] Among them, the inner wall of the valve seat body 1 is provided with a groove 33 for installing the inflatable extrusion ring 4. When the opening and closing plate is installed in the valve seat body 1 for use, a certain amount of gas can be filled into the inflatable extrusion ring 4 to allow the inflatable extrusion ring 4 to expand and contact the opening and closing plate. While achieving extrusion sealing, it can effectively avoid the wear of the valve seat body 1 caused by excessive frequency of contact between the opening and closing plate and the valve seat.

[0034] like Figures 1 to 4 As shown, in this embodiment, it should be noted that the actual size of each component in the application document is selected according to the actual needs on site. The valve seat body 1 with holes is selected for installation before implementation. The valve seat in the application document is only one of the components of the butterfly valve. The inflatable extrusion ring 4 is used in conjunction with the opening and closing plate, which is a commercially available product of the prior art. In addition, based on the public documents, the application document only improves the shortcomings that the opening and closing plate inside the existing valve seat is rotated to fit with the valve seat for blocking, but after multiple uses, the frequency of contact between the opening and closing plate and the valve seat is too high, which will cause the butterfly seat to wear, thereby causing the sealing effect between the opening and closing plate and the butterfly seat to deteriorate, and does not involve other aspects; the working principle of this valve seat that is easy to maintain is introduced as follows:

[0035] During installation and use, the on-site personnel place the sealing rubber rings 13 in the sealing grooves 11 on both sides of the valve seat body 1, and let the positioning protrusions 112 of the sealing rubber ring 13 be stuck in the positioning installation holes 111, and then connect the flanges of the pipeline to the two sides of the valve seat body 1 respectively, so that the flanges are in close contact with the sealing rubber rings 13, thereby improving the sealing effect of the pipeline connection;

[0036] The on-site personnel insert the valve shaft into the shaft groove 12 of the mounting block 3, and then respectively sleeve the ends of the pneumatic actuator on the positioning studs 31, and then screw on the fastening cylinder 32 to assemble the pneumatic actuator, and connect the main shaft of the pneumatic actuator with the valve shaft, so that the side of the pneumatic actuator contacts the gasket 2, thereby achieving convenient disassembly and maintenance, and improving the sealing effect of the connection between the valve seat body 1 and the pneumatic actuator;

[0037] When the opening and closing plate is installed in the valve seat body 1 for use, a certain amount of gas can be filled into the inflatable extrusion ring 4 to allow the inflatable extrusion ring 4 to expand and contact the opening and closing plate. While achieving extrusion sealing, it can effectively avoid the wear of the valve seat body 1 caused by excessive contact between the opening and closing plate and the valve seat, thereby extending the service life of the opening and closing plate and the valve seat body 1; during maintenance, the flange on the pipeline and the bolts on the side of the valve seat body 1 are removed, the fastening cylinder 32 is unscrewed, the valve shaft and the opening and closing plate are pulled out, and the inflatable extrusion ring 4, the sealing rubber ring 13 and the gasket 2 in the valve seat body 1 can be removed for replacement.

[0038] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A valve seat that is easy to maintain, characterized in that: It comprises a valve seat body (1), both sides of the valve seat body (1) are provided with sealing notches (11), and a sealing rubber ring (13) is provided in the sealing notch (11); It also includes: a mounting block (3) arranged on the side of the valve seat body (1), wherein positioning studs (31) are arranged at the four corners of the side of the mounting block (3), and each positioning stud (31) is connected to a fastening cylinder (32); The inflatable extrusion ring (4) is arranged on the inner wall surface of the valve seat body (1), and the inflatable port (41) of the inflatable extrusion ring (4) is arranged on the valve seat body (1).

2. A valve seat easy to maintain according to claim 1, characterized in that: After the sealing rubber ring (13) is placed in the sealing groove (11), its inner diameter is the same as the inner diameter of the valve seat body (1).

3. A valve seat easy to maintain according to claim 1, characterized in that: The inner wall surface of the sealing notch (11) is provided with circularly distributed positioning and mounting holes (111), and the sealing rubber ring (13) is provided with a positioning protrusion (112) at a position corresponding to each positioning and mounting hole (111).

4. A valve seat easy to maintain according to claim 1, characterized in that: An axial groove (12) is provided through the mounting block (3), and a side surface of the axial groove (12) extends out of the valve seat body (1).

5. The valve seat easy to maintain according to claim 1, characterized in that: The inner wall surface of each fastening cylinder (32) is provided with an internal thread, and each fastening cylinder (32) is threadedly screwed onto the positioning stud (31).

6. A valve seat easy to maintain according to claim 4, characterized in that: A mounting groove (34) is provided on the side of the mounting block (3), a washer (2) is provided in the mounting groove (34), and the inner diameter of the mounting groove (34) is greater than the outer diameter of the shaft groove (12).

7. The valve seat for easy maintenance according to claim 1, characterized in that: The inner wall of the valve seat body (1) is provided with a groove (33) for installing the inflation extrusion ring (4).

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