Worm gear flange type hard sealing butterfly valve

Abstract

The utility model provides a worm gear flange type hard sealing butterfly valve which comprises a valve plate rotationally arranged in a valve body, the valve plate comprises a bottom plate, a sealing seat, a supporting plate and a hoop, one end of the bottom plate is fixedly connected to the periphery of the valve seat in a sleeved mode through the hoop, the cross section of the bottom plate is of a T-shaped structure, and the supporting plate is arranged on the periphery of one end of the bottom plate. One end of the supporting plate is used for supporting the inner ring of the sealing seat, and the sealing seat is located between the supporting plate and the bottom plate. According to the worm gear flange type hard sealing butterfly valve, the supporting plate is installed on the periphery of the bottom plate of the T-shaped structure, the sealing seat is supported by the supporting plate, the sealing seat can be tightly attached to the inner ring of the valve body, and when the periphery of the sealing seat or the inner ring of the valve body is abraded, the sealing seat can not be damaged. The purpose of micro expansion of the outer diameter of the sealing seat can be achieved by adjusting the supporting plate to support the inner ring of the sealing seat, the service life of parts is prolonged, and the problem that the valve body is installed on a pipeline in a butt-clamped mode and is inconvenient to disassemble and difficult to maintain is solved.

Description

Technical Field

[0001] The utility model belongs to the field of butterfly valves, in particular to a worm gear flange type hard sealing butterfly valve. Background Art

[0002] The hard-sealed butterfly valve, also known as the flap valve, is a simple regulating valve that can also be used for the on-off control of low-pressure pipeline media. The hard-sealed butterfly valve mainly plays a role of cutting off and throttling on the pipeline. The butterfly valve opening and closing part is a disc-shaped butterfly plate that rotates around its own axis in the valve body to achieve the purpose of opening and closing or regulating. The hard-sealed butterfly valve is suitable for pipelines that transport various corrosive and non-corrosive fluid media in generators, coal gas, steam, natural gas, city gas, hot and cold air, chemical smelting projects, and power generation and environmental protection systems. It is used to regulate and cut off the flow of the medium. In the prior art, when the hard-sealed butterfly valve is used for a long time, the hard seal between the valve plate and the valve seat will wear, resulting in poor sealing effect. When disassembling the valve body to weld the seal, the operation is complicated, disassembly is difficult, and time-consuming. Utility Model Content

[0003] In view of this, the utility model aims to propose a worm gear flange type hard-sealed butterfly valve to solve the problem that the hard seal between the valve plate and the valve seat of the prior art hard-sealed butterfly valve wears out during long-term use, resulting in poor sealing effect and difficult maintenance.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] A worm gear flange type hard-sealed butterfly valve comprises a valve plate rotatably arranged in a valve body, the valve plate comprising a bottom plate, a sealing seat, a support plate and a clamp, one end of the bottom plate is fixedly sleeved to the periphery of the valve seat by a clamp, the cross section of the bottom plate is a T-shaped structure, a support plate is arranged on the periphery of one end of the bottom plate, one end of the support plate is used to support the inner ring of the sealing seat, and the sealing seat is located between the support plate and the bottom plate.

[0006] Furthermore, a top support platform is provided at one end of the support plate, and the top support platform is a hollow truncated cone structure.

[0007] Furthermore, the bottom plate, the sealing seat and the supporting plate are connected in sequence by bolts, an elliptical long hole is provided on the sealing seat, and the outer periphery of the bolt is located in the elliptical long hole.

[0008] Furthermore, a sealing rubber pad is arranged between the sealing seat and the support plate and around the periphery of the top support platform.

[0009] Furthermore, a sealing rubber ring is arranged on the periphery of the sealing seat.

[0010] Furthermore, an annular surfacing seal is provided on the inner ring of the valve body, and the periphery of the sealing seat can abut against the surfacing seal.

[0011] Furthermore, the valve body is provided with a through hole, the outer periphery of the valve shaft is rotatably sleeved into the through hole, a bracket is installed on the valve body, a worm gear assembly is fixed on the bracket, one end of the valve shaft is connected to the output end of the worm gear assembly, and a handwheel is provided at the input end of the worm gear assembly.

[0012] Compared with the prior art, the worm gear flange type hard seal butterfly valve described in the utility model has the following beneficial effects:

[0013] (1) The worm gear flange type hard seal butterfly valve described in the utility model has a support plate installed on the periphery of the bottom plate of the T-shaped structure. The support plate supports the sealing seat, so that the sealing seat and the inner ring of the valve body can be tightly fitted. When there is wear on the periphery of the sealing seat or the inner ring of the valve body, the outer diameter of the sealing seat can be slightly expanded by adjusting the support plate to support the inner ring of the sealing seat, thereby improving the service life of the parts and preventing the valve body from being difficult to disassemble due to being clamped on the pipeline.

[0014] (2) The worm gear flange type hard seal butterfly valve described in the utility model has a top support platform of a hollow truncated cone structure. The wedge-shaped structure of the support platform can be used to stabilize the relative position of the sealing seat when adjusting the relative position of the support plate and the bottom plate. At the same time, the machining accuracy requirements of the inner ring of the sealing seat are reduced, and the versatility of the sealing seat can be improved.

[0015] (3) In the worm gear flange type hard seal butterfly valve described in the present invention, the outer periphery of the bolt is located in the elliptical long hole to prevent the bolt from interfering with the expansion of the sealing seat when the support platform supports the sealing seat. The elliptical long hole is a bolt avoidance structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0017] Figure 1 It is a front view structural schematic diagram of the worm gear flange type hard seal butterfly valve according to the embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the valve plate according to an embodiment of the utility model;

[0019] Figure 3 This is a schematic diagram of the explosion structure of the valve plate according to an embodiment of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the support plate according to an embodiment of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the sealing seat according to an embodiment of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the base plate described in an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1-valve body; 2-valve plate; 21-bottom plate; 22-sealing seat; 221-sealing rubber ring; 222-elliptical long hole; 23-support plate; 231-top support platform; 24-clamp; 25-sealing rubber pad; 26-bolt; 3-valve shaft; 4-valve seat; 5-bracket; 6-worm gear assembly; 7-handwheel. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0029] like Figure 1-Figure 6As shown, the worm gear flange type hard-sealed butterfly valve includes a valve plate 2 rotatably arranged in the valve body 1, the valve plate 2 includes a bottom plate 21, a sealing seat 22, a support plate 23 and a hoop 24, one end of the bottom plate 21 is fixedly sleeved to the periphery of the valve seat 4 through the hoop 24, the cross section of the bottom plate 21 is a T-shaped structure, a support plate 23 is arranged on the periphery of one end of the bottom plate 21, one end of the support plate 23 is used to support the inner ring of the sealing seat 22, and the sealing seat 22 is located between the support plate 23 and the bottom plate 21, the support plate 23 is installed on the periphery of the bottom plate 21 of the T-shaped structure, the sealing seat 22 is supported by the support plate 23, so that the sealing seat 22 can be closely fitted with the inner ring of the valve body 1, when there is wear on the periphery of the sealing seat 22 or the inner ring of the valve body 1, the outer diameter of the sealing seat 22 can be slightly expanded by adjusting the support plate 23 to support the inner ring of the sealing seat 22, thereby improving the service life of the parts and preventing the valve body 1 from being installed on the pipeline in a clamped manner and being inconvenient to disassemble, resulting in the problem of difficult maintenance.

[0030] A top support platform 231 is set at one end of the support plate 23, and the top support platform 231 is a hollow cone structure. When the relative position of the support plate 23 and the bottom plate 21 is adjusted through the wedge-shaped structure of the support platform, the purpose of stabilizing the relative position of the sealing seat 22 can be achieved. At the same time, the processing accuracy requirements of the inner ring of the sealing seat 22 are reduced, and the versatility of the sealing seat 22 can also be improved.

[0031] The bottom plate 21, the sealing seat 22 and the support plate 23 are connected in sequence by bolts 26. An elliptical long hole 222 is provided on the sealing seat 22. The outer periphery of the bolt 26 is located in the elliptical long hole 222 to prevent the bolt 26 from interfering with the expansion of the sealing seat 22 when the support platform supports the sealing seat 22. The elliptical long hole 222 is an avoidance structure for the bolt 26.

[0032] A sealing rubber pad 25 is arranged between the sealing seat 22 and the support plate 23 and on the periphery of the top support platform 231 to fill the gap between the sealing seat 22 and the support plate 23 to prevent objects from falling therein. A sealing rubber ring 221 is arranged on the periphery of the sealing seat 22. The sealing rubber ring 221 is a supplementary seal for the hard seal between the sealing seat 22 and the valve body 1. In this embodiment, the hard seal between the sealing seat 22 and the valve body 1 is a ring-shaped surfacing seal arranged on the inner ring of the valve body 1, and the periphery of the sealing seat 22 can abut against the surfacing seal.

[0033] A through hole is provided on the valve body 1, and the outer periphery of the valve shaft 3 is rotatably sleeved into the through hole. A bracket 5 is installed on the valve body 1, and a worm gear assembly 6 is fixedly arranged on the bracket 5. One end of the valve shaft 3 is connected to the output end of the worm gear assembly 6, and a handwheel 7 is arranged at the input end of the worm gear assembly 6. The worm gear assembly 6 is the prior art.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Worm gear flange hard seal butterfly valve, characterized by: The invention comprises a valve plate (2) rotatably arranged in a valve body (1), the valve plate (2) comprising a bottom plate (21), a sealing seat (22), a support plate (23) and a clamp (24), one end of the bottom plate (21) is fixedly sleeved to the periphery of the valve seat (4) through the clamp (24), the cross section of the bottom plate (21) is a T-shaped structure, a support plate (23) is arranged on the periphery of one end of the bottom plate (21), one end of the support plate (23) is used to support the inner ring of the sealing seat (22), and the sealing seat (22) is located between the support plate (23) and the bottom plate (21).

2. The worm gear flange type hard seal butterfly valve according to claim 1 is characterized in that: A top support platform (231) is provided at one end of the support plate (23), and the top support platform (231) is a hollow truncated cone structure.

3. The worm gear flange type hard seal butterfly valve according to claim 1, characterized in that: The bottom plate (21), the sealing seat (22) and the supporting plate (23) are connected in sequence by bolts (26); an elliptical long hole is provided on the sealing seat (22), and the outer periphery of the bolt (26) is located in the elliptical long hole.

4. The worm gear flange type hard seal butterfly valve according to claim 2, characterized in that: A sealing rubber pad (25) is arranged between the sealing seat (22) and the supporting plate (23) and on the periphery of the top supporting platform (231).

5. The worm gear flange type hard seal butterfly valve according to claim 1, characterized in that: A sealing rubber ring (221) is arranged on the periphery of the sealing seat (22).

6. The worm gear flange type hard seal butterfly valve according to claim 1, characterized in that: An annular cladding seal is arranged on the inner ring of the valve body (1), and the outer periphery of the sealing seat (22) can abut against the cladding seal.

7. The worm gear flange type hard seal butterfly valve according to claim 1, characterized in that: A through hole is provided on the valve body (1), and the outer periphery of the valve shaft (3) is rotatably sleeved into the through hole. A bracket (5) is installed on the valve body (1), and a worm gear assembly (6) is fixedly arranged on the bracket (5). One end of the valve shaft (3) is connected to the output end of the worm gear assembly (6), and a hand wheel (7) is arranged at the input end of the worm gear assembly (6).

Images