CN214367831U

CN214367831U - Eccentric butterfly valve

Info

Publication number: CN214367831U
Application number: CN202023342795.4U
Authority: CN
Inventors: 王展波; 白维岭
Original assignee: Tianjin Tanggu Twt Valve Co ltd
Current assignee: Tianjin Tanggu Twt Valve Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-10-08
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses an eccentric butterfly valve, which comprises a valve body; a valve plate is arranged in the valve cavity of the valve body and connected with a valve shaft; the valve plate is provided with a valve plate sealing ring through a sealing pressure ring, and a rigid valve body sealing ring is embedded on a sealing seat of the valve body; and each compression ring monomer is connected with the valve plate through a fastening bolt and compresses the valve plate sealing ring. Because the utility model discloses a concatenation formula clamping ring structure can realize concrete adjustment and maintenance change, need adjust a plurality of housing screws's loaded down with trivial details operation simultaneously when having saved the integral clamping ring of adjustment in addition, has simplified operation process, has improved maintenance efficiency, prolongs the change cycle of valve plate sealing washer simultaneously.

Description

Eccentric butterfly valve

Technical Field

The utility model belongs to the technical field of the valve, especially, relate to an eccentric butterfly valve.

Background

Butterfly valves are known to be simple, small, lightweight and composed of a few parts. And the valve can be quickly opened and closed only by rotating 90 degrees, the operation is simple, and meanwhile, the valve has good fluid control characteristics. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is 0-90 degrees, and when the disc-shaped butterfly plate rotates to 90 degrees, the valve is in a full-open state. When the flange butterfly valve is in a fully open position, the thickness of the butterfly plate is the only resistance when a medium flows through the valve body, so that the pressure drop generated by the valve is small, and the flange butterfly valve has a good flow passing characteristic.

The sealing pressure ring on the valve plate of the existing butterfly valve adopts an integral structure, and because the pressure ring is a quick-wear part, the leakage problem can be caused once the pressure ring is damaged, the traditional method needs to replace the new pressure ring again, and the whole pressure ring needs to be replaced when replaced, so that the use cost is improved; in addition, the existing butterfly valves with different calibers need to be provided with pressure rings with different sizes and specifications, and the pressure rings do not have interchangeability and universality. Therefore, the utility model designs an eccentric butterfly valve with a splicing type pressure ring,

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model provides a solve current whole clamping ring structure, cause the maintenance to change, intensity of labour is big, the maintenance cost is high has the eccentric butterfly valve of concatenation formula clamping ring.

The utility model is realized in such a way that an eccentric butterfly valve comprises a valve body; a valve plate is arranged in the valve cavity of the valve body and connected with a valve shaft; the valve plate is provided with a valve plate sealing ring through a sealing pressure ring, and a rigid valve body sealing ring is embedded on a sealing seat of the valve body; and each compression ring monomer is connected with the valve plate through a fastening bolt and compresses the valve plate sealing ring.

Preferably, in the technical scheme, the compression ring monomer is an arc-shaped structure body, one end of the compression ring monomer is provided with a buckling protrusion, the other end of the compression ring monomer is provided with a buckling notch matched with the buckling protrusion, the compression ring body is provided with two mounting holes, one mounting hole is a pre-tightening hole, the other mounting hole is a pre-tightening adjusting hole, the aperture of the pre-tightening adjusting hole is larger than that of the pre-tightening hole, and the pre-tightening hole and the pre-tightening adjusting hole are located on the same reference circle; and a sealing groove concentric with the pressing ring monomer is arranged on the rear side surface of the pressing ring body.

Preferably, the outer surface of the buckling protrusion part is composed of an outer side inclined surface positioned on the outer side and an inner side inclined surface positioned on the inner side, and a joint part of the outer side inclined surface and the inner side inclined surface is formed by circular arc transition enclosing, wherein the outer side inclined surface and the inner side inclined surface form a mirror symmetry structure; the matching surface of the buckling notch part and the outer surface of the buckling bulge part consists of an outer side inclined surface and an inner side inclined surface, wherein the outer side inclined surface and the inner side inclined surface are in a mirror symmetry structure; the included angle between the outer side inclined surface and the inner side inclined surface of the buckling and pressing convex part is smaller than the included angle between the outer side inclined surface and the inner side inclined surface of the buckling and pressing notch part.

Above-mentioned technical scheme is preferred, the contained angle between the outside inclined plane of above-mentioned withholding bulge and the inboard inclined plane is less than withholding 5 ~ 15 degrees of contained angle between the outside inclined plane and the inboard inclined plane of notch portion.

According to the preferable technical scheme, the arc at the corner of the sealing groove is in smooth transition.

The utility model has the advantages that because the utility model adopts the splicing type compression ring structure, each compression ring monomer is pressed mutually to ensure the stability of the installation of the valve plate sealing ring; the utility model discloses a withhold and be equipped with the cooperation angular difference between bulge and the withhold notch part to can realize using same clamping ring monomer in the butterfly valve that the bore differs greatly, different bores only adopt the clamping ring monomer to be quantity difference, can not bring the change of parts such as valve plate, valve plate sealing washer, and then the clamping ring has the commonality; during assembly, the compression amount of the sealing ring can be effectively adjusted through the independently adjusted compression bolt, so that the optimal sealing performance is ensured; when the valve is used for a period of time, the problem of local leakage occurs, and the problem of local sealing leakage is solved by checking that the sealing leakage is not caused by the damage of a valve plate sealing ring and then adjusting a compression screw for local adjustment; the complicated operation that a plurality of compression screws need to be adjusted simultaneously when the integral compression ring is adjusted is omitted, the operation process is simplified, the maintenance efficiency is improved, and meanwhile, the replacement period of the valve plate sealing ring is prolonged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is an enlarged view of section I of FIG. 2;

FIG. 4 is a schematic diagram of DN1400 sealing ring structure;

FIG. 5 is a schematic view of a pressure ring monomer configuration;

FIG. 6 is a rear view of FIG. 5;

FIG. 7 is a cross-sectional view A-A of FIG. 5;

FIG. 8 is a schematic perspective view of a pressure ring monomer;

fig. 9 is DN1200 eccentric butterfly valve;

fig. 10 is DN1000 eccentric butterfly valve.

In the figure, 1, a valve body; 2. a valve plate; 3. a valve shaft; 4. a valve plate seal ring; 5. a rigid valve body seal ring; 6. Sealing the pressure ring; 6-1, pressing a ring monomer; 6-10, buckling the convex part; 6-101 parts of an outer inclined surface; 6-102, inner inclined surface; 6-103, arc transition; 6-11, buckling the notch part; 6-110 parts of outer inclined surface; 6-111, inner inclined plane; 6-12, pre-tightening holes; 6-13, pre-tightening the adjusting hole; 6-14, sealing the groove; 7. and fastening the bolt.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following 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.

Referring to fig. 1 to 8, an eccentric butterfly valve includes a valve body 1; a valve plate 2 is arranged in the valve cavity of the valve body and is connected with a valve shaft 3; a valve plate sealing ring 4 is arranged on the valve plate through a sealing pressure ring 6, a rigid valve body sealing ring 5 is embedded on a sealing seat of the valve body, and the sealing pressure ring adopts a split structure and is formed by sequentially splicing a plurality of pressure ring monomers 6-1; and each pressure ring monomer is connected with the valve plate through a fastening bolt 7 and compresses the valve plate sealing ring.

Preferably, in the technical scheme, the pressure ring monomer 6-1 is an arc-shaped structural body, one end of the pressure ring monomer is provided with a buckling convex part 6-10, the other end of the pressure ring monomer is provided with a buckling concave part 6-11 matched with the buckling convex part, the pressure ring body is provided with two mounting holes, one mounting hole is a pre-tightening hole 6-12, the other mounting hole is a pre-tightening adjusting hole 6-13, the aperture of the pre-tightening adjusting hole is larger than that of the pre-tightening hole, the pre-tightening hole and the pre-tightening adjusting hole are located on the same graduated circle, when adjustment is needed, the opposite sides of the pressure ring monomer are adjusted by taking a fastening bolt in the pre-tightening hole as the center of a circle, and the inner diameter of the pre-tightening adjusting hole is larger than the outer diameter of the fastening bolt, so that the inclination angle of the pressure ring monomer relative to valve plates with different diameters can be met; and the rear side surface of the pressure ring body is provided with sealing grooves 6-14 which are concentric with the pressure ring monomer.

Preferably, the outer surface of the buckling bulge 6-10 is composed of an outer side inclined surface 6-101 positioned on the outer side and an inner side inclined surface 6-102 positioned on the inner side, and the joint of the outer side inclined surface and the inner side inclined surface is enclosed by an arc transition 6-103, wherein the outer side inclined surface and the inner side inclined surface are in a mirror symmetry structure; the matching surface of the buckling notch part 6-11 and the outer surface of the buckling bulge part consists of an outer side inclined surface 6-110 positioned on the inner side and an inner side inclined surface 6-111 positioned on the inner side, and the outer side inclined surface and the inner side inclined surface form a mirror symmetry structure; the above-mentioned contained angle of withholding between the outside inclined plane of bulge and the inboard inclined plane is less than withholding the contained angle between the outside inclined plane of notch portion and the inboard inclined plane, so adopt different contained angle designs, do benefit to the regulation between the adjacent clamping ring monomer, avoid taking place to interfere, also further enlarge the angle of adjustment between the adjacent clamping ring monomer simultaneously, satisfy the valve use of more bores.

Above-mentioned technical scheme is preferred, sealed recess corner circular arc smooth transition reduces the damage to the turn-ups sealing washer, especially can produce a comparatively obvious extrusion to the valve plate sealing washer when local adjustment, if there is feather angle or closed angle in the corner will damage the valve plate sealing washer.

The butterfly valve in the above embodiment with the DN1400 specification adopts 23 pressure ring monomers, and can also be applied to a valve with a small nominal diameter, specifically referring to fig. 9, where 20 same pressure ring monomers are required for a DN1200 pressure ring; referring to fig. 10 in particular, the pressure ring shown in fig. 10 is formed by splicing 16 same pressure ring monomers in DN 1000.

In conclusion, the splicing type pressure ring structure is adopted, and the pressure ring monomers are pressed together to ensure the stability of the installation of the valve plate sealing ring; the utility model discloses a withhold and be equipped with the cooperation angular difference between bulge and the withhold notch part to can realize using same clamping ring monomer in the butterfly valve that the bore differs greatly, different bores only adopt the clamping ring monomer to be quantity difference, can not bring the change of parts such as valve plate, valve plate sealing washer, and then the clamping ring has the commonality; during assembly, the compression amount of the sealing ring can be effectively adjusted through the independently adjusted compression bolt, so that the optimal sealing performance is ensured; when the valve is used for a period of time, the problem of local leakage occurs, and the problem of local sealing leakage is solved by checking that the sealing leakage is not caused by the damage of a valve plate sealing ring and then adjusting a compression screw for local adjustment; the complicated operation that a plurality of compression screws need to be adjusted simultaneously when the integral compression ring is adjusted is omitted, the operation process is simplified, the maintenance efficiency is improved, and meanwhile, the replacement period of the valve plate sealing ring is prolonged.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. An eccentric butterfly valve, comprising a valve body; a valve plate is arranged in the valve cavity of the valve body and connected with a valve shaft; the valve plate is provided with a valve plate sealing ring through a sealing pressure ring, and a rigid valve body sealing ring is embedded on a sealing seat of the valve body; and each compression ring monomer is connected with the valve plate through a fastening bolt and compresses the valve plate sealing ring.

2. The eccentric butterfly valve of claim 1, wherein: the compression ring single body is an arc-shaped structure body, one end of the compression ring single body is provided with a buckling protrusion part, the other end of the compression ring single body is provided with a buckling notch part matched with the buckling protrusion part, two mounting holes are arranged on the compression ring body, one mounting hole is a pre-tightening hole, the other mounting hole is a pre-tightening adjusting hole, the aperture of the pre-tightening adjusting hole is larger than that of the pre-tightening hole, and the pre-tightening hole and the pre-tightening adjusting hole are positioned on the same reference circle; and a sealing groove concentric with the pressing ring monomer is arranged on the rear side surface of the pressing ring body.

3. The eccentric butterfly valve of claim 2, wherein: the outer surface of the buckling and pressing convex part is composed of an outer side inclined plane positioned on the outer side and an inner side inclined plane positioned on the inner side, and the joint part of the outer side inclined plane and the inner side inclined plane is formed by circular arc transition enclosure, wherein the outer side inclined plane and the inner side inclined plane form a mirror symmetry structure;

the matching surface of the buckling notch part and the outer surface of the buckling bulge part consists of an outer side inclined surface and an inner side inclined surface, wherein the outer side inclined surface and the inner side inclined surface are in a mirror symmetry structure;

the included angle between the outer side inclined surface and the inner side inclined surface of the buckling and pressing convex part is smaller than the included angle between the outer side inclined surface and the inner side inclined surface of the buckling and pressing notch part.

4. The eccentric butterfly valve of claim 2, wherein: the included angle between the outer side inclined plane and the inner side inclined plane of the buckling and pressing protruding part is smaller than the included angle between the outer side inclined plane and the inner side inclined plane of the buckling and pressing notch part by 5-15 degrees.

5. The eccentric butterfly valve of claim 2, wherein: and the arc at the corner of the sealing groove is in smooth transition.