CN216951716U - Two-way butterfly valve - Google Patents

Abstract

The utility model discloses a bidirectional butterfly valve, which adopts the technical scheme that the bidirectional butterfly valve comprises a valve body, a valve rod inserted in the valve body, a valve plate positioned on the valve rod, a valve seat positioned in the valve body and a pressing ring used for pushing the valve seat to the valve plate to form sealing, wherein the valve seat comprises an outer valve seat ring fixedly connected with the inner wall of the valve body, an inner valve seat ring which can be sleeved outside the valve plate and is coaxially arranged with the outer valve seat ring and a sealing ring positioned between the outer valve seat ring and the inner valve seat ring, the inner hole of the outer valve seat ring is a countersunk hole, the inner valve seat ring is positioned in a hole with a large diameter of the outer valve seat ring, the inner valve seat ring comprises an integrally formed conical surface ring and a circular ring connected on the end surface with a small diameter of the conical surface ring, the sealing ring is sleeved outside the circular ring, the joint of the inner wall of the conical surface ring and the inner wall of the circular ring is attached to the peripheral wall of the valve plate, the pressing ring extends into one end of the valve body, the outer wall of the conical surface ring and the inner wall of the outer valve seat ring are both attached to the sealing ring, the problem of prior art can only one-way logical liquid and seal structure life-span end is solved.

Description

Two-way butterfly valve

Technical Field

The utility model relates to the field of valves, in particular to a bidirectional butterfly valve.

Background

At present, the types of industrial valves are various, and the large-caliber valve is mainly applied to tap water pipelines, sewage pipelines, gas pipelines and the like of water plants and mainly plays a role in regulating and stopping the flow of fluid and gas media. However, the existing butterfly valve is usually a one-way sealing type butterfly valve, and as the traditional butterfly valve with double eccentric flanges cannot realize two-way sealing, only one-way pressure bearing is realized, although a two-way metal sealing butterfly valve has been designed in the prior art, the sealing degree of the sealing pair structure is reduced due to the compression deformation of the sealing ring after the sealing pair structure is used for a period of time, and even the sealing ring is compressed and dislocated, so that the service life of the sealing pair structure is directly influenced.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a bidirectional butterfly valve which is more reasonable in sealing structure, better in sealing performance, long in service life and capable of bearing bidirectional pressure of media.

In order to realize the purpose, the utility model provides the following technical scheme: the utility model provides a two-way butterfly valve, includes the valve body, alternates in the valve body valve rod, be located the valve plate on the valve rod, be located the disk seat in the valve body and be used for pushing the disk seat to the valve plate and form sealed clamping ring, the disk seat is including the outer disk seat ring with valve body inner wall fixed connection, can overlap locate the valve plate outside and with the coaxial interior disk seat ring that sets up of outer disk seat ring and be located the sealing washer between outer disk seat ring and the interior disk seat ring, the hole of outer disk seat ring is the counter sink, interior disk seat ring is located the downthehole that outer disk seat ring diameter is big, interior disk seat ring is including integrated into one piece's conical surface ring and the ring that links up on the terminal surface that conical surface ring diameter is little, outside the ring is located to the sealing washer cover, the terminal surface that conical surface ring diameter is big pushes up with the ladder face of outer disk seat ring and touches mutually, the junction of conical surface ring inner wall and ring inner wall is laminated with the perisporium of valve plate, one end that the clamping ring stretches into the valve body, The outer wall of the conical surface ring and the inner wall of the outer valve seat ring are both attached to the sealing ring.

As a further improvement of the utility model, the peripheral wall of the valve plate is a circular table surface.

As a further improvement of the utility model, the end part of the pressure ring, which is adjacent to the port of the valve body flow channel, is provided with a connecting ring with the diameter larger than that of the pressure ring, the connecting ring is fixedly connected with the valve body through a bolt, and a gap arranged along the axial direction of the valve body flow channel exists between the connecting ring and the valve body.

As a further improvement of the utility model, the valve rod is of an eccentric structure, the axial eccentricity is C, and the radial eccentricity is C.

As a further improvement of the utility model, the peripheral wall of the valve plate is provided with a wear-resistant layer which is attached to the joint of the inner wall of the conical surface ring and the inner wall of the circular ring.

The utility model has the beneficial effects that: the valve seat consists of an outer valve seat ring, an inner valve seat ring and a sealing ring, the inner valve seat ring and the valve plate form hard sealing, and the outer valve seat ring, the inner valve seat ring and the pressing ring form soft sealing with the sealing ring; the peripheral wall of the valve plate is designed into a circular table top, and compared with the design of a cylindrical surface in the prior art, the hard seal effect is better; the design of the gap can recover the sealing between the valve seat and the valve plate under the condition of not removing the compression ring, thereby effectively prolonging the service life of the valve seat and indirectly prolonging the service life of the utility model.

Drawings

FIG. 1 is a front view of the present invention

FIG. 2 is a right side elevation view of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Reference numerals: 1. a valve body; 2. a valve stem; 3. a valve plate; 4. a valve seat; 41. an outer valve seat ring; 42. an inner valve seat ring; 43. a seal ring; 44. a conical surface ring; 45. a circular ring; 5. pressing a ring; 6. a wear layer; 7. a connecting ring; 8. a void.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 3, a two-way butterfly valve of the present embodiment includes a valve body 1, a valve rod 2 inserted into the valve body 1, a valve plate 3 positioned on the valve rod 2, a valve seat 4 positioned in the valve body 1, and a pressing ring 5 for pushing the valve seat 4 toward the valve plate 3 to form a seal;

based on the prior art, the valve rod 2 is of an eccentric structure, the axial eccentricity is C, the radial eccentricity is C, and the selection of the eccentricity is determined by calculation according to the size of the caliber of the valve; the valve seat 4 comprises an outer valve seat ring 41, an inner valve seat ring 42 and a sealing ring 43, the outer wall of the outer valve seat ring 41 is attached to the inner wall of the internal flow passage of the valve body 1 and is welded to enable the outer valve seat ring 41 to be fixedly connected into the valve body 1, the valve plate 3 is positioned in the inner hole of the outer valve seat ring 41, the peripheral wall of the valve plate 3 is a circular table surface, the large end of the outer valve seat ring 41 faces the valve rod 2, the inner hole of the outer valve seat ring 41 is a countersunk hole, the small end of the outer valve seat ring 41 faces the valve rod 2, the inner valve seat ring 42 comprises an integrally formed conical surface ring 44 and a circular ring 45 connected to the end surface of the conical surface ring 44 with the small diameter, the circular ring 45 and the conical surface ring 44 are coaxially arranged, the large end of the conical surface ring 44 moves towards the step surface of the outer valve seat ring 41 until the joint of the inner wall of the conical surface ring 44 and the inner wall of the circular ring 45 is in contact with the peripheral wall of the valve plate 3, an O-shaped sealing ring 43 is arranged in the outer valve seat ring 41 and sleeved outside the circular ring 45, the distance between the inner wall of the large end of the outer valve seat ring 41 is the same as the diameter of the sealing ring 43, the end part of the pressure ring 5 adjacent to the flow channel port of the valve body 1 is integrally formed with a connecting ring 7 with a diameter larger than the major diameter of the pressure ring 5, the connecting ring 7 is provided with a plurality of through holes, the major diameter of the pressure ring 5 is the same as the major diameter of the outer valve seat ring 41, the pressure ring 5 extends into the flow channel of the valve body 1 and presses against the sealing ring 43, a plurality of bolts respectively penetrate through the plurality of through holes on the connecting ring 7 and are in threaded connection with the valve body 1, in the rotating process of the bolts, the pressure ring 5 pushes the sealing ring 43, the sealing ring 43 is attached to the outer wall of the conical surface ring 44 and pushes the conical surface ring 44 to move towards the step surface of the outer valve seat ring 41, the joint of the inner wall of the conical surface ring 44 and the inner wall of the circular ring 45 is tightly attached to the peripheral wall of the valve plate 3 to form a hard seal, the inner valve seat ring 42 keeps static along with the continuous movement of the pressure ring 5, the sealing ring 43 is elastically deformed, and one end of the pressure ring 5 extending into the valve body 1, the outer wall of the conical surface ring 44 and the inner wall of the outer valve seat ring 41 are attached to form a soft seal, stopping rotating the bolt, wherein a gap 8 arranged along the axial direction of a flow passage of the valve body 1 exists between the connecting ring 7 and the valve body 1, and in the use process, because the peripheral wall of the valve plate 3 and the inner wall of the inner valve seat ring 42 are abraded, the sealing ring 43 pushes the inner valve seat ring 42 to the step surface of the outer valve seat ring 41 through the elasticity of the sealing ring 43 to ensure that the peripheral wall of the valve plate 3 and the inner wall of the inner valve seat ring 42 can still form hard sealing, when leakage occurs, the bolt is continuously rotated to recover the sealing effect, the gap 8 is reduced until the large end of the conical surface ring 44 is attached to the step surface of the outer valve seat ring 41, and if leakage occurs again later, the inner valve seat ring 42, the sealing ring 43 or the valve plate 3 needs to be replaced;

compared with the prior art, the design can realize bidirectional liquid communication, the hard seal between the valve plate 3 and the inner valve seat ring 42 and the soft seal at the sealing ring 43 form double seal together and prevent liquid leakage, and the sealing structure is stable and has good sealing effect; the peripheral wall of the valve plate 3 is designed into a circular table top, and compared with the design of making a cylindrical surface in the prior art, the hard seal effect is better; the design of the gap 8 can recover the sealing between the valve seat 2 and the valve plate 3 under the condition of not removing the press ring 5, thereby effectively prolonging the service life of the valve seat 2 and indirectly prolonging the service life of the utility model.

As a specific embodiment of the improvement, referring to fig. 3, a wear-resistant layer 6 attached to a joint between an inner wall of the conical ring 44 and an inner wall of the circular ring 45 is disposed on a peripheral wall of the valve plate 3, and the wear-resistant layer 6 may be made of oxide ceramic with strong wear resistance and good stability and welded to the peripheral wall of the valve plate 3.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims (5)

1. The utility model provides a two-way butterfly valve, includes valve body (1), alternates valve rod (2) in valve body (1), valve plate (3) of being located on valve rod (2), be located disk seat (4) in valve body (1) and be used for pushing disk seat (4) to valve plate (3) and form sealed clamping ring (5), its characterized in that: the valve seat (4) comprises an outer valve seat ring (41) fixedly connected with the inner wall of the valve body (1), an inner valve seat ring (42) which is coaxially arranged with the outer valve seat ring (41) and a sealing ring (43) which is positioned between the outer valve seat ring (41) and the inner valve seat ring (42) can be sleeved outside the valve plate (3), the inner valve seat ring (42) is positioned in a hole with a large diameter of the outer valve seat ring (41), the inner valve seat ring (42) comprises an integrally formed conical surface ring (44) and a circular ring (45) which is connected on the end surface with a small diameter of the conical surface ring (44), the sealing ring (43) is sleeved outside the circular ring (45), the end surface with a large diameter of the conical surface ring (44) can be in contact with the step surface of the outer valve seat ring (41), and the connection part of the inner wall of the conical surface ring (44) and the inner wall of the circular ring (45) is attached to the peripheral wall of the valve plate (3), one end of the pressing ring (5) extending into the valve body (1), the outer wall of the conical surface ring (44) and the inner wall of the outer valve seat ring (41) are attached to the sealing ring (43).

2. The two-way butterfly valve of claim 1, wherein: the peripheral wall of the valve plate (3) is a circular table surface.

3. The bidirectional butterfly valve of claim 1 or 2, wherein: the tip that neighbouring valve body (1) runner port department in clamping ring (5) is provided with go-between (7) that the diameter is greater than clamping ring (5) diameter, go-between (7) are through bolt and valve body (1) fixed connection, there is space (8) of arranging along valve body (1) runner axis direction between go-between (7) and valve body (1).

4. The bidirectional butterfly valve of claim 1 or 2, wherein: the valve rod (2) is of an eccentric structure, the axial eccentricity is C, and the radial eccentricity is C.

5. The bidirectional butterfly valve of claim 1 or 2, wherein: and a wear-resistant layer (6) attached to the joint of the inner wall of the conical ring (44) and the inner wall of the circular ring (45) is arranged on the peripheral wall of the valve plate (3).

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