CN219673320U

CN219673320U - Hard butterfly valve is bumped to hard

Info

Publication number: CN219673320U
Application number: CN202320995981.2U
Authority: CN
Inventors: 陈广晖; 陈洪
Original assignee: Wenzhou Yaheng Technology Co ltd
Current assignee: Wenzhou Yaheng Technology Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-09-12
Anticipated expiration: 2033-04-27

Abstract

The utility model discloses a hard-touch butterfly valve, which comprises a valve body, a first valve rod and a second valve rod, wherein the first valve rod and the second valve rod are rotatably arranged on the valve body; an elastic valve seat ring which is in butt joint and seal with the wear-resistant layer and a valve cover for pressing the elastic valve seat ring are arranged on the valve body, and a floating gap is formed between the outer peripheral surface of the elastic valve seat ring and the inner wall of the valve body; the valve cover is of an integrated structure; excessive elasticity compensation can avoid the excessive wear of the sealing surface, and the radial elastic acting force of the elastic valve seat ring is relied on for seal compensation in the specific dynamic seal adjusting process, so that the axial position does not need to be manually adjusted.

Description

Hard butterfly valve is bumped to hard

Technical Field

The utility model relates to the technical field of butterfly valves, in particular to a hard-touch butterfly valve.

Background

The rotary butterfly valve is a valve with a valve rod driving an opening and closing piece (a butterfly plate) and rotating around the axis of the ball valve, and the hard-touch hard-seal rotary butterfly valve is a rotary butterfly valve with a valve seat sealing surface and a butterfly plate sealing surface which are both hard sealing surfaces, wherein the valve seat with an inclined plane is usually adopted in the existing butterfly valve to be pushed by a thrust ring to float in the axial direction, so that the contact seal between the butterfly plate and the valve seat is ensured in the rotation process of the butterfly plate.

As disclosed in chinese patent CN108953629a, the disclosure date is 2018.12.07, and the butterfly valve specifically describes a structure comprising a valve body, a valve rod and a butterfly plate, wherein the outer circumference of the butterfly plate is provided with a butterfly plate sealing ring and a pressing plate matched with the butterfly plate for clamping and installing the butterfly plate sealing ring, the inner circumference of the valve body is provided with a floating valve seat matched with the butterfly plate sealing ring, the butterfly plate sealing ring adopts a three-dimensional oblique cone complex curved surface, and the inner circumference of the floating valve seat is a three-dimensional eccentric conical surface and is matched with the butterfly plate sealing ring; the floating valve seat can slide in a fixed range along the axial direction, an adjusting piece for adjusting the position of the floating valve seat is further arranged on the inner circumferential surface of the valve body, the adjusting piece is arranged on one side of the floating valve seat, a limiting step is arranged on the other side of the floating valve seat on the valve body, and the distance between the limiting step and the adjusting piece is the adjusting range of the floating valve seat.

In the above patent, after the floating valve seat and the thrust ring are matched, the floating valve seat and the thrust ring can be automatically adjusted to the optimal sealing position under the action of the medium pressure, but the axial direction is specifically adopted to adjust the position of the floating valve seat in an adjusting mode that loads such as a thrust ring structure and an adjusting screw are required to be added, and the relative position of the floating valve seat is required to be manually adjusted so as to ensure that the butterfly plate rotates within a certain range to keep sealing fit with the floating valve seat.

Disclosure of Invention

First technical problem

The utility model aims to provide a hard-touch butterfly valve, which solves the problem that the relative position of a floating valve seat is required to be manually adjusted in the prior art to keep sealing fit in the rotation process of a butterfly plate.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the hard-touch hard butterfly valve comprises a valve body, a first valve rod and a second valve rod which are rotatably arranged on the valve body, wherein the first valve rod and the second valve rod are arranged at intervals and are provided with butterfly plates, and the outer circumferences of the butterfly plates are provided with wear-resistant layers in a surfacing mode; an elastic valve seat ring which is in butt joint and seal with the wear-resistant layer and a valve cover for pressing the elastic valve seat ring are arranged on the valve body, and a floating gap is formed between the outer peripheral surface of the elastic valve seat ring and the inner wall of the valve body; the valve cover is of an integrated structure.

Preferably, the matching sealing surface of the wear-resistant layer and the elastic valve seat ring is a conical surface.

Preferably, the wear-resistant layer is made of SDL hard alloy.

Preferably, a connecting seat is fixedly installed on the valve body, the first valve rod penetrates through the connecting seat, and an invisible gland used for sealing a gap between the first valve rod and the connecting seat is arranged on the connecting seat.

Preferably, an actuator for driving the first valve rod to rotate is mounted on the connecting seat.

Preferably, a supporting seat for supporting the second valve rod is fixedly arranged on the valve body, and a supporting bearing in running fit with the second valve rod is arranged at the bottom of the supporting seat.

Preferably, the valve body is provided with a step structure for supporting the elastic valve seat ring, the step structure is provided with a sealing groove, and a sealing gasket is placed in the sealing groove.

Preferably, the sealing gasket is composed of a stainless steel sheet and a graphite gasket.

Preferably, the valve cover is provided with a matching step matched with the valve body, and the matching step is provided with an annular groove and a sealing ring sleeved in the annular groove.

Preferably, the valve cover is welded and fixed with the valve body, and a diversion inclined plane inclining from outside to inside is arranged on the valve cover.

(III) beneficial effects

The floating gap is formed between the elastic valve seat ring and the valve body, so that the elastic valve seat ring has certain elasticity in the rotation process of the butterfly plate and can avoid, and the dynamic compensation of the sealing surface and a good sealing state can be kept in the rotation process; after the butterfly plate rotates to the closing position, the sealing surface keeps a sealing state due to the reverse acting force of the elastic valve seat ring, so that good sealing performance can be kept in the rotation and closing states;

in addition, excessive abrasion of the sealing surface can be avoided through elastic compensation, and in the specific adjustment dynamic sealing process, the sealing compensation is carried out by means of radial elastic acting force of the elastic valve seat ring, the condition that the axial position is not required to be manually adjusted is avoided, and the device has adaptability to media with temperature change and pressure change under specific use conditions.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure at A in FIG. 1;

FIG. 3 is a schematic cross-sectional view of the structure of FIG. 1;

in fig. 1 to 3, the correspondence between the component names or lines and the drawing numbers is:

the valve comprises a valve body 1, a first valve rod 2, a second valve rod 3, a butterfly plate 4, a wear-resistant layer 5, an elastic valve seat ring 6, a valve cover 7, a floating gap 8, a connecting seat 9, an invisible gland 10, a supporting seat 11, a supporting bearing 12, a step structure 13, a sealing gasket 14, a matching step 15, an annular groove 16, a sealing ring 17 and a diversion inclined plane 18.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1-3, the embodiment of the utility model provides a hard-touch butterfly valve, which comprises a valve body, a first valve rod and a second valve rod rotatably arranged on the valve body, wherein the first valve rod and the second valve rod are arranged at intervals and are provided with butterfly plates, and the outer circumferences of the butterfly plates are provided with wear-resistant layers in a surfacing mode; the butterfly plate is rotationally installed through the first valve rod and the second valve rod, sealing is achieved through the wear-resisting layer in the process of rotating the butterfly plate, specifically, an elastic valve seat ring which is in butt joint with the wear-resisting layer and a valve cover used for pressing the elastic valve seat ring are installed on the valve body, a floating gap is formed between the outer peripheral surface of the elastic valve seat ring and the inner wall of the valve body, a sealing surface is formed by contact of the wear-resisting layer and the inner ring of the elastic valve seat, the sealing surface is a conical surface, the wear-resisting layer on the butterfly plate can be guaranteed to keep good sealing under the elastic avoidance action of the elastic valve seat ring after the angle of rotating the butterfly plate, the situation that friction force is large is avoided, and the elastic avoidance of the elastic valve seat ring is achieved through the floating gap. In order to ensure reliable compression of the valve cover to the elastic valve seat ring and to ensure the stability of the whole structure, the valve cover is of an integrated structure.

In order to improve the service life of the wear-resistant surface, the wear-resistant layer is made of SDL hard alloy, and the wear-resistant surface can be fixedly connected in a surfacing mode and then processed.

Specifically, fixedly mounted has the connecting seat on the valve body, first valve rod passes the connecting seat, be equipped with on the connecting seat and be used for sealing first valve rod with the stealthy gland in gap between the connecting seat realizes sealing and keeps first valve rod can rotate through stealthy gland. It is to be noted that, after the first valve rod rotates and brings the butterfly plate to rotate, the second valve rod rotates and supports along with the butterfly plate, and because the interval sets up between the first valve rod and the second valve rod, can avoid causing the condition of butterfly plate deformation under the condition of different thermal expansion coefficients, keep sealed effect in effective state.

Specifically when carrying out the drive rotation to the butterfly plate, through install on the connecting seat be used for driving first valve rod pivoted executor, the executor adopt among the prior art product can, can adopt manual or automatic mode to carry out power input mainly through first valve rod.

In order to support the second valve rod and reduce the rotating friction force, a supporting seat for supporting the second valve rod is fixedly arranged on the valve body, a supporting bearing in running fit with the second valve rod is arranged at the bottom of the supporting seat, hard alloy can be adopted for the supporting bearing, and the contact part of the supporting bearing and the second valve rod is as smooth as possible to reduce the rotating friction force.

In order to ensure that the elastic valve seat ring keeps the sealing effect with the valve body in the elastic deformation range, the valve body is specifically provided with a step structure for supporting the elastic valve seat ring, the step structure is provided with a sealing groove, a sealing gasket is placed in the sealing groove, the sealing gasket is composed of a stainless steel sheet and a graphite gasket, the wear resistance is improved, the sliding friction force is reduced through the action of the graphite gasket, and a good sealing effect can be formed.

In order to reliably position the valve gap after installing the valve body be equipped with on the valve gap with valve body complex cooperation step, set up annular channel and cover on the cooperation step and establish sealing washer in the annular channel, through cooperation step and valve body cooperation back, realize sealedly under the effect of sealing washer, simultaneously the valve gap with welded fastening between the valve body, be equipped with the water conservancy diversion inclined plane that inclines from outside to inside on the valve gap, let the valve gap fix the relative position after the valve body and produce not deformation to can embrace pillow business turn over fluidic flow under the effect of water conservancy diversion inclined plane.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a hard butterfly valve is bumped to hard, its characterized in that: the valve comprises a valve body, a first valve rod and a second valve rod which are rotatably arranged on the valve body, wherein the first valve rod and the second valve rod are arranged at intervals and are provided with butterfly plates, and the outer circumferences of the butterfly plates are provided with wear-resistant layers in a surfacing mode;

an elastic valve seat ring which is in butt joint and seal with the wear-resistant layer and a valve cover for pressing the elastic valve seat ring are arranged on the valve body, and a floating gap is formed between the outer peripheral surface of the elastic valve seat ring and the inner wall of the valve body;

the valve cover is of an integrated structure.

2. The hard-on-hard butterfly valve of claim 1, wherein: the wear-resistant layer and the elastic valve seat ring matched sealing surface are conical surfaces.

3. A hard-touch butterfly valve according to claim 2, wherein: the wear-resistant layer is made of SDL hard alloy.

4. The hard-on-hard butterfly valve of claim 1, wherein: the valve body is fixedly provided with a connecting seat, the first valve rod penetrates through the connecting seat, and the connecting seat is provided with an invisible gland used for sealing a gap between the first valve rod and the connecting seat.

5. The hard-on-hard butterfly valve of claim 4, wherein: and an actuator for driving the first valve rod to rotate is arranged on the connecting seat.

6. The hard-on-hard butterfly valve of claim 5, wherein: the valve body is fixedly provided with a supporting seat for supporting the second valve rod, and the bottom of the supporting seat is provided with a supporting bearing in running fit with the second valve rod.

7. A hard-touch butterfly valve according to any one of claims 1-6, wherein: the valve body is provided with a step structure for supporting the elastic valve seat ring, the step structure is provided with a sealing groove, and a sealing gasket is placed in the sealing groove.

8. The hard-on-hard butterfly valve of claim 7, wherein: the sealing gasket is composed of a stainless steel sheet and a graphite gasket.

9. The hard-on-hard butterfly valve of claim 7, wherein: the valve cover is provided with a matching step matched with the valve body, and the matching step is provided with an annular groove and a sealing ring sleeved in the annular groove.

10. The hard-on-hard butterfly valve of claim 9, wherein: the valve cover is welded and fixed with the valve body, and a diversion inclined plane inclining from outside to inside is arranged on the valve cover.