CN214146626U

CN214146626U - Floating valve seat structure of bidirectional soft sealing butterfly valve

Info

Publication number: CN214146626U
Application number: CN202022899893.1U
Authority: CN
Inventors: 王志坚; 朱绍艺; 王伟杰; 朱志强
Original assignee: Tianjin Krs Valve Co ltd
Current assignee: Tianjin Krs Valve Co ltd
Priority date: 2020-12-03
Filing date: 2020-12-03
Publication date: 2021-09-07
Anticipated expiration: 2030-12-03

Abstract

The utility model provides a floating valve seat structure of a bidirectional soft seal butterfly valve, which comprises a floating valve seat, wherein the floating valve seat is sealed and pressed in a valve body through a seal press ring, the inner side of the valve body is provided with a flange matched with the floating valve seat, the flange is arranged at one side away from the seal press ring, a gap is left between the floating valve seat and the flange of the valve body, one end of the floating valve seat close to the valve body is provided with a trapezoidal groove, a first seal ring is arranged in the trapezoidal groove, and one side of the floating valve seat close to the seal press ring is provided with a second seal ring; a valve plate matched with the floating valve seat is arranged in the valve body, and the end face of the valve plate, close to one side of the floating valve seat, is of a spherical structure; the utility model discloses a butterfly valve both way seal can be realized to the cooperation form of soft disk seat and the O type sealing washer of floating, and is wear-resisting, the leakproofness is stable.

Description

Floating valve seat structure of bidirectional soft sealing butterfly valve

Technical Field

The utility model belongs to the valve field especially relates to a floating valve seat structure of two-way soft sealing butterfly valve.

Background

The butterfly valve has the excellent characteristics of convenient and rapid opening and closing, labor saving, small fluid resistance, small opening and closing moment and the like, and is widely used for controlling the flow of various types of fluids such as slurry, water and various corrosive media;

the soft sealing valve seat used in the butterfly valve is made of a non-metallic material with certain strength, hardness and good temperature resistance, has better sealing performance compared with a hard sealing valve seat, and has the problems of easy abrasion, poor mechanical performance and the like.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims at providing a floating valve seat structure of two-way soft sealing butterfly valve to solve easy wearing and tearing, the poor problem of sealed effect that the soft sealing valve seat exists.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a floating valve seat structure of a bidirectional soft sealing butterfly valve comprises a floating valve seat, wherein the floating valve seat is pressed and fixed in a valve body in a sealing mode through a sealing press ring, a flange matched with the floating valve seat is arranged on the inner side of the valve body, the flange is arranged on one side far away from the sealing press ring, a gap is reserved between the floating valve seat and the flange of the valve body, a trapezoidal groove is formed in one end, close to the valve body, of the floating valve seat, a first sealing ring is arranged in the trapezoidal groove, and a second sealing ring is arranged on one side, close to the sealing press ring, of the floating valve seat;

the valve body is internally provided with a valve plate matched with the floating valve seat, and the end face of the valve plate close to one side of the floating valve seat is of a spherical structure.

Furthermore, the end part of one end of the sealing compression ring, which is close to the floating valve seat, is inwards provided with a step, the step comprises a first-stage step and a second-stage step, the second-stage step is fixedly arranged on the end face of the first-stage step, and the second sealing ring is arranged between the second-stage step and the valve body.

Further, the first-stage step and the second-stage step are both rectangular structures, the height of the first-stage step is larger than that of the second-stage step, a groove for arranging the first sealing ring is formed between the top end of the first-stage step and the valve body, and the floating valve seat is correspondingly arranged on the step.

Furthermore, the sealing press ring, the first-stage step and the second-stage step are integrally formed.

Further, an upper valve shaft and a lower valve shaft are arranged on the inner side of the valve body, the upper valve shaft and the lower valve shaft are respectively arranged at two ends of the valve plate, and an upper shaft sleeve, a packing pad, a third sealing ring and a packing gland are sequentially arranged between the outer surface of the upper valve shaft and the valve body from bottom to top;

the upper shaft sleeve is annularly arranged around the upper valve shaft, the number of the third sealing rings is multiple, multi-stage sealing is realized, and the packing gland is fixed on the valve body through a bolt.

Furthermore, a lower shaft sleeve is arranged between the outer surface of the lower valve shaft and the valve body, and a sealing plug is further arranged on the lower valve shaft and used for sealing the lower valve shaft.

Furthermore, the first sealing ring, the second sealing ring and the third sealing ring are all O-shaped sealing rings.

Compared with the prior art, a two-way soft sealing butterfly valve's disk seat structure that floats have following advantage:

(1) the floating valve seat structure of the bidirectional soft sealing butterfly valve adopts the matching form of the soft floating valve seat and the O-shaped sealing ring, can realize bidirectional sealing of the butterfly valve, and has the outstanding characteristics of wear resistance, stable sealing performance, smaller technical difficulty and the like;

(2) a two-way soft seal butterfly valve's adaptable wear-resisting harsh operating mode of disk seat structure that floats, the life-span is longer.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural view of a floating valve seat of a bidirectional soft seal butterfly valve according to an embodiment of the present invention;

fig. 2 is a schematic view of a floating valve seat structure of a bidirectional soft seal butterfly valve according to an embodiment of the present invention.

Description of reference numerals:

1-a valve body; 2-upper valve shaft; 3-lower valve shaft; 4-a valve plate; 5-a floating valve seat; 6, sealing the pressure ring; 601-a first step; 602-a secondary step; 7-upper shaft sleeve; 8-a filler mat; 9-a packing gland; 10-a first sealing ring; 11-a second sealing ring; 12-a third sealing ring; 13-lower shaft sleeve; 14-sealing the stopper.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 and 2, a floating valve seat structure of a bidirectional soft seal butterfly valve comprises a floating valve seat 5, the floating valve seat 5 is pressed and fixed in a valve body 1 in a sealing manner through a sealing press ring 6, a flange matched with the floating valve seat 5 is arranged on the inner side of the valve body 1, the flange is arranged on one side far away from the sealing press ring 6, a gap is reserved between the floating valve seat 5 and the flange of the valve body 1, the gap is used for the movement allowance of the floating valve seat, a trapezoidal groove is arranged at one end, close to the valve body 1, of the floating valve seat 5, the trapezoidal groove is used for reducing the pressing elastic quantity of the floating valve seat 5 and is easy to assemble, a first seal ring 10 is arranged in the trapezoidal groove, a second seal ring 11 is arranged at one side, close to the sealing press ring 6, of the floating valve seat 5, the first seal ring 10 and the second seal ring 11 are, the service life is long;

the valve body 1 is internally provided with a valve plate 4 matched with the floating valve seat 5, and the end surface of one side, close to the floating valve seat 5, of the valve plate 4 is of a spherical structure.

The one end tip that sealing ring 6 is close to unsteady disk seat 5 inwards is equipped with the step, the step includes one-level step 601 and second grade step 602, second grade step 602 sets firmly on the terminal surface of one-level step 601, second sealing washer 11 sets up between second grade step 602 and valve body 1.

The first-stage step 601 and the second-stage step 602 are both rectangular structures, the height of the first-stage step 601 is larger than that of the second-stage step 602, a groove for arranging the first sealing ring 10 is formed between the top end of the first-stage step 601 and the valve body 1, and the floating valve seat 5 is correspondingly arranged on the steps.

The sealing press ring 6, the first-stage step 601 and the second-stage step 602 are integrally formed.

An upper valve shaft 2 and a lower valve shaft 3 are arranged on the inner side of the valve body 1, the upper valve shaft 2 and the lower valve shaft 3 are respectively arranged at two ends of the valve plate 4, an upper shaft sleeve 7, a packing pad 8, a third sealing ring 12 and a packing gland 9 are sequentially arranged between the outer surface of the upper valve shaft 2 and the valve body 1 from bottom to top, and multi-stage sealing can be realized;

the upper shaft sleeve 7 is annularly arranged around the upper valve shaft 2, the number of the third sealing rings 12 is multiple, the sealing effect is obvious, and the packing gland 9 is fixed on the valve body 1 through bolts.

A lower shaft sleeve 13 is arranged between the outer surface of the lower valve shaft 3 and the valve body 1, and a sealing plug 14 is further arranged on the lower valve shaft 3 and used for sealing the lower valve shaft 3.

The first sealing ring 10, the second sealing ring 11 and the third sealing ring 12 are all O-shaped sealing rings.

Unsteady disk seat 5 adopts the unsteady disk seat 5 of PTFE + C material, and this patent application adopts the unsteady disk seat of PTFE + C material, can realize the effect that wear-resisting, sealed effect are stable.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a two-way soft seal butterfly valve's disk seat structure that floats which characterized in that: the floating valve comprises a floating valve seat (5), wherein the floating valve seat (5) is sealed and pressed in a valve body (1) through a sealing press ring (6), a flange which is matched with the floating valve seat (5) is arranged on the inner side of the valve body (1), the flange is arranged on one side away from the sealing press ring (6), a gap is reserved between the floating valve seat (5) and the flange of the valve body (1), a trapezoidal groove is formed in one end, close to the valve body (1), of the floating valve seat (5), a first sealing ring (10) is arranged in the trapezoidal groove, and a second sealing ring (11) is arranged on one side, close to the sealing press ring (6), of the floating valve seat (5);

the valve is characterized in that a valve plate (4) matched with the floating valve seat (5) is arranged in the valve body (1), and the end face of one side, close to the floating valve seat (5), of the valve plate (4) is of a spherical structure.

2. The floating valve seat structure of a bidirectional soft seal butterfly valve according to claim 1, wherein: the one end tip that sealing ring (6) are close to unsteady disk seat (5) inwards is equipped with the step, the step includes one-level step (601) and second grade step (602), second grade step (602) set firmly on the terminal surface of one-level step (601), second sealing washer (11) set up between second grade step (602) and valve body (1).

3. The floating valve seat structure of a bidirectional soft seal butterfly valve according to claim 2, wherein: one-level step (601) and second grade step (602) are the rectangle structure, the height that highly is greater than second grade step (602) of one-level step (601), form the recess that is used for setting up first sealing washer (10) between the top of one-level step (601) and valve body (1), unsteady valve seat (5) correspond the setting on the step.

4. The floating valve seat structure of a bidirectional soft seal butterfly valve according to claim 2, wherein: the sealing press ring (6), the first-stage step (601) and the second-stage step (602) are integrally formed.

5. The floating valve seat structure of a bidirectional soft seal butterfly valve according to claim 1, wherein: an upper valve shaft (2) and a lower valve shaft (3) are arranged on the inner side of the valve body (1), the upper valve shaft (2) and the lower valve shaft (3) are respectively arranged at two ends of the valve plate (4), and an upper shaft sleeve (7), a packing pad (8), a third sealing ring (12) and a packing gland (9) are sequentially arranged between the outer surface of the upper valve shaft (2) and the valve body (1) from bottom to top;

the upper shaft sleeve (7) is annularly arranged around the upper valve shaft (2), the number of the third sealing rings (12) is multiple, multi-stage sealing is achieved, and the packing gland (9) is fixed on the valve body (1) through bolts.

6. The floating valve seat structure of a bidirectional soft seal butterfly valve according to claim 5, wherein: a lower shaft sleeve (13) is arranged between the outer surface of the lower valve shaft (3) and the valve body (1), and a sealing plug (14) is further arranged on the lower valve shaft (3) and used for sealing the lower valve shaft (3).

7. The floating valve seat structure of a bidirectional soft seal butterfly valve according to claim 5, wherein: the first sealing ring (10), the second sealing ring (11) and the third sealing ring (12) are all O-shaped sealing rings.