CN211820779U - Valve seat and butt-clamping butterfly valve comprising same - Google Patents

Abstract

The utility model discloses a valve seat and a butt-clamping butterfly valve comprising the same, relating to the technical field of valves, wherein the valve seat comprises an annular hard framework and a rubber sealing ring, the hard framework is arranged outside the sealing ring, the side walls of the hard framework and the sealing ring are symmetrically provided with shaft holes matched with a valve rod, and the central line of the shaft holes is vertical to the central line of the sealing ring; the hard framework is arranged in the groove of the U-shaped sealing ring, and the annular convex eaves at the two ends of the sealing ring extend to the outside of the end surface of the hard framework, so that the defects that the valve seat is easy to buckle and deform and lock the valve plate are overcome; the butt-clamping butterfly valve with the valve seat further comprises a valve body and a valve rod with a valve plate, wherein the valve body comprises an upper valve body and a lower valve body, the valve rod penetrates through shaft holes of the upper valve body and the valve seat from top to bottom, and the lower end of the valve rod is in rotating fit with a shaft end hole in the inner wall of the lower valve body; the hard framework is fixedly wrapped on the upper valve body and the lower valve body which are fixed through the connecting pieces, the end faces of the convex eaves at the two ends of the sealing ring protrude out of the two end faces of the valve body, a press-fitting process is not needed, the valve can be disassembled and maintained on site, and the maintenance cost is reduced.

Description

Valve seat and butt-clamping butterfly valve comprising same

Technical Field

The utility model relates to the technical field of valves, especially, relate to a disk seat and contain butt clamp butterfly valve of this disk seat.

Background

At present, the valve seat of the existing center line butt-clamping butterfly valve generally has the following structures: firstly, contain the rubber valve seat of stereoplasm skeleton, the sealed face in disk seat both ends is the narrowband, requires that the ring flange of installing can not use the flat welding ring flange, and the internal diameter size requirement to the ring flange is very strict. Secondly, the broadband rubber sealing valve seat without the hard framework can use a flat welding flange, the requirement on the inner diameter of the flange is not strict, but the deadly defects that the rubber valve seat is easily buckled and deformed and the valve plate is locked by the valve seat exist. Thirdly, the broadside rubber seal valve seat directly vulcanized on the valve body, although the structure avoids the defects of the first valve seat and the second valve seat, the manufacturing cost is high, and the valve seat cannot be maintained and replaced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a valve seat, which can solve the structure and installation defects existing in the prior rubber valve seat of the butt-clamping butterfly valve, and thoroughly solve the fatal defects that the valve seat is easy to be buckled, deformed and locked; the butt-clamping butterfly valve with the valve seat can overcome the defects that the center line butt-clamping butterfly valve has strict requirements on the shape selection of the matched flange plate type, the size of the inner cavity of the flange plate and the installation experience of installation personnel.

In order to solve the technical problem, the utility model discloses the technical scheme who takes is:

a valve seat comprises an annular hard framework and a rubber sealing ring, wherein the hard framework is arranged outside the sealing ring, shaft holes matched with a valve rod are symmetrically formed in the side wall of the sealing ring, mounting holes are correspondingly formed in the side wall of the hard framework, and the center lines of the shaft holes and the mounting holes are superposed and perpendicular to the center lines of the sealing ring and the hard framework; the cross-section of sealing washer is the U-shaped, the U-shaped inslot of sealing washer is arranged in to the stereoplasm skeleton, the both ends annular eaves of sealing washer extends to the terminal surface outside of stereoplasm skeleton.

Preferably, the outer end faces of the convex eaves at the two ends protrude out of the end face of the inner hole of the sealing ring, the outer diameter of the convex eaves is larger than that of the hard skeleton, and a truncated cone with the same outer diameter as that of the hard skeleton is arranged on the inner side end face of the outer circular face of the convex eaves.

Preferably, the shaft hole is a stepped hole with a large outer part and a small inner part, and the outer blind hole of the shaft hole can accommodate a framework sealing ring sleeved on the valve rod.

Preferably, the hard framework and the sealing ring are tightly matched or vulcanized into a whole.

Preferably, the hard framework is made of phenolic resin, glass fiber reinforced plastic, plastic or aluminum alloy.

The utility model also provides a butt clamp butterfly valve containing the valve seat, and further comprises a valve body and a valve rod with a valve plate, wherein the valve body is of a split structure and comprises an upper valve body and a lower valve body, the valve rod penetrates through the upper valve body and the valve seat from top to bottom, and the lower end of the valve rod is in running fit with a shaft end hole of the inner wall of the lower valve body; the upper valve body and the lower valve body are respectively provided with an arc groove with opposite concave surfaces, and the two ends of the arc of the upper valve body and the two ends of the arc of the lower valve body are fixedly connected through a connecting piece; the concave surfaces of the arc-shaped grooves of the upper valve body and the lower valve body are tightly attached to the outer circular surface of the hard framework, and the end surfaces of the convex eaves at the two ends of the sealing ring protrude out of the two end surfaces of the valve body.

Preferably, the outer edges of the two ends of the arc-shaped groove of the upper valve body and the outer edge of the two ends of the arc-shaped groove of the lower valve body are provided with seam allowances matched with the outer circle of the convex eaves.

Preferably, the connecting piece is two sets of bolt pairs, and the circular arc both ends of upper valve body and lower valve body all are equipped with the mounting hole with bolt complex.

Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: compared with the prior art, the utility model has the advantages that the hard framework is arranged outside the sealing ring, the sealing ring with the U-shaped section is adopted, and the hard framework is arranged in the U-shaped groove of the sealing ring, so that the annular convex eaves at the two ends of the sealing ring can extend to the outside of the end surface of the hard framework, and the defects that the valve seat is easy to buckle and deform and lock the valve plate are overcome; the butt-clamping butterfly valve adopting the valve seat overcomes the defects that the center line butt-clamping butterfly valve has harsh requirements on the type selection of the flange plate and the size of the inner cavity of the flange plate, and has no harsh requirements on the skill of installation workers. Utilize the utility model discloses can reduce production manufacturing cost, the production assembly is extremely easy, especially adapted automatic mass production, and the installation maintenance is extremely convenient, the utility model discloses product development prospect is wide.

Drawings

Fig. 1 is a schematic structural diagram of a valve seat according to an embodiment of the present invention;

FIG. 2 is a left side view of FIG. 1;

FIG. 3 is a cross-sectional view C-C of FIG. 2;

FIG. 4 is an A-direction view of FIG. 2;

FIG. 5 is a cross-sectional view B-B of FIG. 4;

FIG. 6 is a schematic structural view of the rigid skeleton of FIG. 1;

fig. 7 is a schematic view illustrating the matching between a valve body and a valve seat in a butt-clamping butterfly valve according to an embodiment of the present invention;

FIG. 8 is a left side view of FIG. 7;

FIG. 9 is a half-sectional view of FIG. 8;

FIG. 10 is an enlarged view of a portion of FIG. 9 at A;

in the figure: 1-a hard skeleton; 2-sealing ring, 20-convex brim; 3-shaft hole, 30-blind hole; 4-spacer bush; 5-valve body, 51-upper valve body, 52-lower valve body, 53-spigot; 6-connecting piece; 7-mounting holes; 8-shaft end hole; 9-skeleton sealing ring.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-6, the utility model provides a valve seat, including annular stereoplasm skeleton 1 and rubber seal 2, stereoplasm skeleton 1 sets up in the outside of sealing washer 2, the lateral wall symmetry of sealing washer 2 is equipped with the shaft hole 3 with valve rod complex, and the lateral wall correspondence of stereoplasm skeleton 1 is equipped with mounting hole 7, the central line coincidence of shaft hole 3 and mounting hole 7, and perpendicular to the central line of sealing washer 2 and stereoplasm skeleton 1; the cross-section of sealing washer 2 is the U-shaped, sealing washer 2's U-shaped inslot is arranged in to stereoplasm skeleton 1, the both ends annular eaves 20 of sealing washer 2 extends to the terminal surface outside of stereoplasm skeleton 1. The hard framework is embedded in the U-shaped sealing ring groove, so that the defects that the valve seat is easy to deform and lock the valve plate can be overcome, and the safety of the butt-clamping butterfly valve in the using process is ensured.

In a specific embodiment of the present invention, as shown in fig. 1 and 6, the inner hole of the sealing ring 2 is a stepped hole with two large ends and a small middle part, the middle part of the stepped hole is a straight hole, and the two ends of the straight hole are stepped holes; the inner hole of the hard framework 1 is a stepped hole matched with the inner hole of the sealing ring, and the excircle of the hard framework 1 is a cylindrical surface. By adopting the structure, the sealing tightness of the valve plate when closed can be ensured. When the hard framework and the sealing ring are of a split structure, the structure can ensure that the hard framework is tightly sleeved outside the sealing ring.

In a specific embodiment of the present invention, as shown in fig. 1 and 5, the edge of the shaft hole 3 on the side wall of the sealing ring 2 is provided with an annular spacer 4 extending outwards, and the outer wall of the annular spacer 4 is tightly attached to the mounting hole on the side wall of the hard skeleton 1. Utilize annular spacer sleeve firmly to hold the valve rod tightly, avoid stereoplasm skeleton and valve rod direct contact, reduced the resistance that the valve rod receives, also increased the sealed length of valve rod simultaneously, improved the leakproofness of valve. Wherein, the annular spacer bush and the sealing ring are integrally formed.

In an embodiment of the present invention, as shown in fig. 1 and 5, the outer end surface of the protruding eaves 20 at both ends protrudes out of the inner hole end surface of the sealing ring 2, the outer diameter of the protruding eaves 20 is greater than the outer diameter of the hard frame 1, and the inner end surface of the outer circular surface of the protruding eaves 20 is provided with a circular truncated cone 21 having the same outer diameter as the hard frame 1. Adopt this structure cooperation with the valve body when convenient to use, avoid the sealing washer to take place to shift.

As a preferred structure, as shown in fig. 1, 5, 9 and 10, the shaft hole 3 is a stepped hole with a large outside and a small inside, and the outer blind hole 30 of the shaft hole 3 can accommodate the framework oil seal 9 sleeved on the valve rod. When the valve rod is installed, the two limiting platforms at the upper part and the lower part of the valve rod are matched with the limiting grooves at the outer sides of the two shaft holes of the sealing ring, so that the valve rod is ensured to be installed reliably.

In a specific embodiment of the present invention, the hard frame 1 and the sealing ring 2 are tightly fitted or vulcanized together. The hard framework and the sealing ring are tightly combined into a whole through vulcanization or tight fit and assembly, and the nominal size is the same, so that the whole strength of the valve is improved, and the sealing effect is also improved.

Further optimizing the technical scheme, the hard framework 1 can be made of nonmetal such as phenolic resin, glass fiber reinforced plastic, plastic or aluminum alloy. The hard framework has a very simple structure, is easy to form, has no special requirement on material selection, and can be made of any material which can be formed by hard materials; can be manufactured by one-step molding or processing.

In addition, the sealing ring can be made of various rubber materials and is manufactured by adopting an injection molding or vulcanization process.

In a specific embodiment of the present invention, as shown in fig. 1 and 5, the inner wall of the shaft hole on the sealing ring 2 is provided with a sealing groove matched with the valve rod. By adopting the structure, the valve rod and the sealing ring can be ensured to be fixed relatively and firmly.

The utility model also provides a butt clamp butterfly valve, as shown in fig. 7-9, including disk seat, valve body 5 and the valve rod (not drawn in the picture) that has the valve plate of above-mentioned structure, all contain the butt clamp butterfly valve of above-mentioned disk seat and all be within the protection scope of the utility model. In the figure, the valve body 5 is a split structure and comprises an upper valve body 51 and a lower valve body 52, the valve rod penetrates through the upper valve body 51 and the side wall of the valve seat from top to bottom, and the lower end of the valve rod is in running fit with a shaft end hole 8 on the inner wall of the lower valve body 52; the upper valve body 51 and the lower valve body 52 are both provided with arc grooves with opposite concave surfaces, and the two ends of the arc of the upper valve body 51 and the two ends of the arc of the lower valve body 52 are fixedly connected through a connecting piece 6; the concave surfaces of the arc-shaped grooves of the upper valve body 51 and the lower valve body 52 are tightly attached to the outer circular surface of the hard framework 1, and the end surfaces of the convex eaves 20 at the two ends of the sealing ring 2 protrude out of the two end surfaces of the valve body 5, so that the sealing effect is ensured. The technical scheme solves the defects that the rubber valve seat of the center line butt-clamping butterfly valve has strict requirements on the type of the flange plate and the size of the inner cavity of the flange plate. Meanwhile, the production and manufacturing cost is greatly reduced, the current situation that the valve seat is difficult to replace on site at present is solved, the valve seat is extremely convenient to disassemble, assemble and maintain, and the purposes of replacing and maintaining the valve seat on site are achieved.

In a specific embodiment of the utility model, as shown in fig. 9, the outer edges of the two ends of the arc-shaped groove of the upper valve body 51 and the lower valve body 52 are provided with the seam allowance 53 matched with the outer circle of the convex eave 20, so that the sealing ring can be prevented from shifting in the installation and use process by means of the seam allowance, and the sealing effect is improved.

As shown in fig. 9 and 10, the skeletal seal ring 9 is pressed into the blind hole of the upper axial hole of the seal ring by the upper valve body 51 and the lower valve body 52, and the reliability of the axial seal is further improved by the skeletal seal ring.

The connecting piece 6 is two sets of bolt pairs, and mounting holes matched with the bolts are formed in the two ends of the circular arcs of the upper valve body 51 and the lower valve body 52. By adopting the structure, the installation and the disassembly are convenient, the labor intensity of workers is reduced, and the working efficiency is improved.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (8)

1. A valve seat comprises an annular hard framework and a rubber sealing ring, wherein the hard framework is arranged outside the sealing ring, shaft holes matched with a valve rod are symmetrically formed in the side wall of the sealing ring, mounting holes are correspondingly formed in the side wall of the hard framework, and the center lines of the shaft holes and the mounting holes are superposed and perpendicular to the center lines of the sealing ring and the hard framework; the method is characterized in that: the cross-section of sealing washer is the U-shaped, the U-shaped inslot of sealing washer is arranged in to the stereoplasm skeleton, the both ends annular eaves of sealing washer extends to the terminal surface outside of stereoplasm skeleton.

2. The valve seat of claim 1, wherein: the outer end faces of the convex eaves at the two ends protrude out of the end face of the inner hole of the sealing ring, the outer diameter of the convex eaves is larger than that of the hard framework, and a truncated cone with the same outer diameter as that of the hard framework is arranged on the inner side end face of the outer circular face of the convex eaves.

3. The valve seat of claim 1, wherein: the shaft hole is big-outside little step hole in the interior, the outside blind hole in shaft hole can hold the skeleton sealing washer that is used for the suit on the valve rod.

4. The valve seat of claim 1, wherein: the hard framework and the sealing ring are tightly matched or vulcanized into a whole.

5. The valve seat of claim 1, wherein: the hard framework is made of phenolic resin, glass fiber reinforced plastic, plastic or aluminum alloy.

6. The utility model provides a butt clamp butterfly valve which characterized in that: the valve comprises a valve body, a valve rod with a valve plate and a valve seat according to any one of claims 1 to 5, wherein the valve body is of a split structure and comprises an upper valve body and a lower valve body, the valve rod penetrates through the upper valve body and the valve seat from top to bottom, and the lower end of the valve rod is in rotating fit with a shaft end hole in the inner wall of the lower valve body; the upper valve body and the lower valve body are respectively provided with an arc groove with opposite concave surfaces, and the two ends of the arc of the upper valve body and the two ends of the arc of the lower valve body are fixedly connected through a connecting piece; the concave surfaces of the arc-shaped grooves of the upper valve body and the lower valve body are tightly attached to the outer circular surface of the hard framework, and the end surfaces of the convex eaves at the two ends of the sealing ring protrude out of the two end surfaces of the valve body.

7. The butt-clamping butterfly valve according to claim 6, wherein: and the outer edges of the two ends of the arc-shaped groove of the upper valve body and the lower valve body are provided with seam allowances matched with the outer circle of the convex brim.

8. The butt-clamping butterfly valve according to claim 6, wherein: the connecting piece is two sets of bolt pairs, and the circular arc both ends of upper valve body and lower valve body all are equipped with the mounting hole with bolt complex.

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