CN219673305U

CN219673305U - Stop valve

Info

Publication number: CN219673305U
Application number: CN202320997218.3U
Authority: CN
Inventors: 章海滨; 李科瑶; 杨荣
Original assignee: Ningbo Jklong Precision Work Co ltd
Current assignee: Ningbo Jklong Precision Work 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 stop valve, comprising: valve body subassembly, valve rod and valve clack subassembly, have import and export on the valve body subassembly, be equipped with in the valve body subassembly with the lower cavity of import intercommunication, with the last cavity of export intercommunication, go up the cavity with go up through-hole intercommunication between the cavity down, the valve rod rotates to be located on the valve body subassembly, just the bottom of valve rod extends to in the last cavity, the valve clack subassembly is located in the last cavity, the top slip of valve clack subassembly is located in the valve body subassembly to the thread bush is established the outside of valve rod, the bottom of valve clack subassembly with the shutoff of through-hole cooperates, when the valve rod rotates, the valve clack subassembly is along vertical slip, so that the bottom of valve clack subassembly is opened or the shutoff the through-hole. The utility model not only has higher plugging effect, but also is convenient to disassemble and maintain.

Description

Stop valve

Technical Field

The utility model relates to the technical field of valves, in particular to a stop valve.

Background

The valve plays an important role in cutting off and throttling media in a pipeline where the valve is located, wherein the cut-off valve is used as an extremely important cut-off valve, and the sealing is realized by applying torque to the valve rod, and the valve rod applies pressure to the valve clack in the axial direction, so that the sealing surface of the valve clack is tightly attached to the sealing surface of the valve seat, and medium circulation is prevented.

The stop valve in the industry now, valve clack top is assembled in the valve rod hole, the valve rod bottom adopts the binding off technology, make valve clack activity location in the valve rod hole, this mode is through the slight loosening of valve clack, can realize sealed compensation, but this mode also has the problem, valve rod binding off department gets into impurity easily, after the valve clack is blocked by impurity, lead to the valve clack slope, can't realize stopping sealing, simultaneously, the valve rod is nut connection with the rigid coupling mode of valve clack main part, there is the risk of leaking, in addition, the valve rod adopts plastics filler with the sealing of valve gap, there is the torsion of opening and close greatly, the expansion with heat and contraction with cold warp scheduling problem.

Disclosure of Invention

Aiming at the problems of the prior stop valve, the stop valve with good stop effect, high stability, convenient disassembly and assembly and high sealing performance is provided.

The specific technical scheme is as follows:

a shut-off valve, comprising:

the valve body assembly is provided with an inlet and an outlet, a lower cavity communicated with the inlet and an upper cavity communicated with the outlet are arranged in the valve body assembly, and the upper cavity is communicated with the lower cavity through a through hole;

the valve rod is rotationally arranged on the valve body assembly, and the bottom of the valve rod extends into the upper cavity;

the valve clack assembly is located in the upper cavity, the top of the valve clack assembly is slidably arranged in the valve body assembly, the valve clack assembly is sleeved with threads on the outer portion of the valve rod, the bottom of the valve clack assembly is matched with the through hole in a plugging mode, and when the valve rod rotates, the valve clack assembly slides longitudinally, so that the bottom of the valve clack assembly is opened or plugged.

As a further improvement and optimization of the scheme, the valve clack assembly comprises a core part and a lining part, wherein the top of the core part is slidably arranged in the valve body assembly, and the lining part is coated at the bottom of the core part and is in plugging fit with the through hole.

As a further improvement and optimization of the scheme, the lining part is made of rubber material and is coated on the bottom of the core part by one-time vulcanization molding.

As a further improvement and optimization of the scheme, the bottom of the bushing part is provided with annular protrusions, the annular protrusions are coaxially distributed with the through holes, and the bottoms of the annular protrusions are of cambered surface structures and are in sealing fit with the opening end faces of the through holes.

As further improvement and optimization of this scheme, the core includes guiding portion and shutoff portion, the top slip of guiding portion is located in the valve body subassembly, the top terminal surface of guiding portion is equipped with the screw hole, the bottom screw thread of valve rod is installed threaded hole, the shutoff portion is located the bottom of guiding portion, just the cladding of bush portion is in the outside of shutoff portion.

As a further improvement and optimization of the present solution, the valve body assembly includes:

the valve body is provided with an inlet at one end and an outlet at the other end, the valve body is internally provided with an upper cavity and a lower cavity, the valve body is internally provided with a valve seat, the through hole is arranged on the valve seat, and the top of the valve body is provided with a mounting port communicated with the upper cavity;

the valve cover is installed by threads at the installation opening, a valve cover cavity is arranged in the valve cover, a sliding hole communicated with the valve cover cavity is formed in the bottom of the valve cover, the sliding hole is of a non-circular hole structure, the horizontal cross section of the guide part is matched with the sliding hole, and the guide part is longitudinally matched with the sliding hole in a sliding manner.

As a further improvement and optimization of the scheme, the top of the valve cover is provided with a sealing plane, the sealing plane is arranged on the periphery of the through hole in a surrounding mode, and the annular protrusion is in sealing fit with the sealing plane.

As a further improvement and optimization of the scheme, the top of the valve cover is provided with a convex neck, the valve rod is rotationally arranged in the convex neck, and the top of the valve rod extends out to the convex neck and is fixedly provided with a handle.

As a further improvement and optimization of the scheme, at least two O-shaped rings are arranged between the valve rod and the inner wall of the convex neck, and the two O-shaped rings are distributed along the axial direction of the valve rod.

As a further improvement and optimization of the scheme, the valve rod, the valve clack assembly and the through hole are coaxially arranged.

Compared with the prior art, the technical scheme has the following positive effects:

(1) According to the utility model, the valve rod and the valve clack assembly are designed in a split type, and the valve rod and the valve clack assembly are connected in a threaded manner, so that when the valve rod is rotated, the valve clack assembly only moves longitudinally but does not rotate, the valve clack assembly can open or seal the through hole, the sealing stability of the valve is improved when the valve is closed, and the valve clack assembly is convenient to detach and maintain.

(2) The bushing part and the core part of the valve clack assembly are formed by one-time vulcanization, so that compared with the existing assembly form of the sealing gasket and the nut, the valve core leakage point is reduced, and the closing effect of the valve is improved.

(3) The bottom of the bushing part is provided with the annular bulge, the bottom of the annular bulge is contacted with the opening end face of the through hole through the cambered surface structure, and the linear surface seal is formed, so that the through hole is plugged, and compared with the plane extrusion seal, the sealing device has better sealing performance.

(4) The valve rod and the convex neck are sealed by adopting the double O-shaped rings, the double sealing ring structure is adopted, and the rubber material of the O-shaped rings is utilized.

Drawings

FIG. 1 is a schematic diagram of a shut-off valve according to the present utility model;

FIG. 2 is a cross-sectional view of a valve flap assembly of a shut-off valve according to the present utility model;

FIG. 3 is a top view of a flap assembly of a stop valve of the present utility model;

FIG. 4 is a cross-sectional view of a valve cover of a shut-off valve according to the present utility model;

in the accompanying drawings: 1. a valve body assembly; 2. a valve flap assembly; 3. a valve stem; 4. a handle; 5. an O-ring; 11. a valve body; 12. a valve seat; 13. a valve cover; 111. an inlet; 112. a lower cavity; 113. an outlet; 114. an upper cavity; 121. a through hole; 122. a sealing plane; 21. a core; 22. a bushing portion; 211. a threaded hole; 221. an annular protrusion; 131. a valve cap cavity; 132. a slide hole; 133. and (5) protruding the neck.

Detailed Description

The utility model is further described below with reference to the drawings and specific examples, which are not intended to be limiting.

Fig. 1 is a schematic view showing the structure of a stop valve according to the present utility model, fig. 2 is a sectional view showing a valve flap assembly of a stop valve according to the present utility model, fig. 3 is a plan view showing a valve flap assembly of a stop valve according to the present utility model, and fig. 4 is a sectional view showing a valve cover of a stop valve according to the present utility model, as shown in fig. 1 to 4, showing a stop valve according to a preferred embodiment, comprising: the valve body assembly 1, the valve rod 3 and the valve clack subassembly 2, the import 111 and export 113 have on the valve body assembly 1, be equipped with in the valve body assembly 1 with import 111 intercommunication lower cavity 112, with export 113 intercommunication go up cavity 114, go up the cavity and pass through the through-hole 121 intercommunication between the cavity 112 down, valve rod 3 rotates and locates on the valve body assembly 1, and the bottom of valve rod 3 extends into upper cavity 114, valve clack subassembly 2 is located last cavity 114, valve clack subassembly 2's top slides locates in the valve body assembly 1, and the screw thread cover is established in the outside of valve rod 3, valve clack subassembly 2's bottom and the shutoff cooperation of through-hole 121, when valve rod 3 rotates, valve clack subassembly 2 slides along vertically, so that valve clack subassembly 2's bottom is opened or shutoff through-hole 121.

In this embodiment, the valve rod 3 and the valve clack assembly 2 are designed in a split type, and the valve rod 3 and the valve clack assembly 2 are in threaded connection, when the valve rod 3 is rotated, the valve clack assembly 2 only moves longitudinally but does not rotate, so that the valve clack assembly 2 can open or block the through hole 121, the blocking stability when the valve is closed is improved, and the valve clack assembly is convenient to detach and maintain.

Further, as a preferred embodiment, the clapper assembly 2 includes a core 21 and a bushing portion 22, wherein the top of the core 21 is slidably disposed in the valve body assembly 1, and the bushing portion 22 is wrapped around the bottom of the core 21 and is in sealing engagement with the through hole 121.

Further, as a preferred embodiment, the bushing portion 22 is made of rubber material and is covered on the bottom of the core 21 by one-time vulcanization molding.

In this embodiment, the bushing portion 22 and the core portion 21 of the valve clack assembly 2 are formed by one-time vulcanization, so that compared with the existing assembly form of a sealing gasket and a nut, the leakage point of the valve core is reduced, and the closing effect of the valve is improved.

Further, as a preferred embodiment, the bottom of the bushing portion 22 has an annular protrusion 221, the annular protrusion 221 is coaxially distributed with the through hole 121, and the bottom of the annular protrusion 221 is in a cambered surface structure and is in sealing fit with the opening end face of the through hole 121.

In this embodiment, the bottom of the bushing portion 22 has an annular protrusion 221, and the bottom of the annular protrusion 221 contacts the opening end surface of the through hole 121 through an arc surface structure and forms a line surface seal, so that the through hole 121 is plugged, and compared with a planar extrusion seal, the sealing has better sealing performance.

Further, as a preferred embodiment, the core 21 includes a guide portion and a plugging portion, the top of the guide portion is slidably disposed in the valve body assembly 1, a threaded hole 211 is disposed on the top end surface of the guide portion, the bottom of the valve rod 3 is threadedly mounted in the threaded hole 211, the plugging portion is disposed at the bottom of the guide portion, and the bushing portion 22 is wrapped outside the plugging portion.

Further, as a preferred embodiment, the valve body assembly 1 includes a valve body 11 and a valve cover 13, one end of the valve body 11 has an inlet 111, the other end has an outlet 113, an upper cavity 114 and a lower cavity 112 are provided in the valve body 11, a valve seat 12 is provided in the valve body 11, a through hole 121 is provided on the valve seat 12, a mounting opening communicated with the upper cavity 114 is provided at the top of the valve body 11, the valve cover 13 is threadedly mounted at the mounting opening, a valve cover cavity 131 is provided in the valve cover 13, a sliding hole 132 communicated with the valve cover 13 cavity is provided at the bottom of the valve cover 13, the sliding hole 132 is in a non-circular hole structure, the horizontal cross section of the guiding part is matched with the sliding hole 132, and the guiding part is longitudinally slidingly matched with the sliding hole 132.

In this embodiment, since the sliding hole 132 is in a non-circular hole structure and the horizontal cross section of the guiding portion of the core 21 is matched with the sliding hole 132, when the valve rod 3 rotates, the guiding portion will not rotate synchronously with the valve rod 3, and under the threaded fit of the threaded hole 211 on the valve rod 3 and the guiding portion, the guiding portion is driven to slide longitudinally in the sliding hole 132, so that the annular protrusion 221 contacts with or separates from the opening end surface of the through hole 121, and further the opening and closing of the valve are realized.

Preferably, the slide hole 132 may be a polygonal hole such as a rectangular hole, a pentagonal hole, a hexagonal hole, or the like.

Further, as a preferred embodiment, the top of the valve cover 13 has a sealing plane 122, the sealing plane 122 is surrounded on the periphery of the through hole 121, and the annular protrusion 221 is in sealing engagement with the sealing plane 122.

Further, as a preferred embodiment, the top of the valve cover 13 has a convex neck 133, the valve rod 3 is rotatably disposed in the convex neck 133, and the top of the valve rod 3 extends out to the convex neck 133 and is fixed with the handle 4.

Further, as a preferred embodiment, at least two O-rings 5 are disposed between the valve stem 3 and the inner wall of the male neck 133, and the two O-rings 5 are distributed along the axial direction of the valve stem 3.

In the embodiment, the valve rod 3 and the convex neck 133 are sealed by adopting a double O-shaped ring 5, a double sealing ring structure is adopted, and rubber materials of the O-shaped ring 5 are utilized, so that compared with the existing plastic packing seal, the sealing structure is small in expansion coefficient, good in sealing performance and small in opening and closing torsion.

Further, as a preferred embodiment, the valve stem 3, the valve clack assembly 2 and the through hole 121 are coaxially arranged.

The foregoing description is only illustrative of the preferred embodiments of the present utility model and is not to be construed as limiting the scope of the utility model, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present utility model, and are intended to be included within the scope of the present utility model.

Claims

1. A shut-off valve, comprising:

2. The shut-off valve of claim 1, wherein the flap assembly includes a core portion slidably disposed within the valve body assembly at a top portion thereof and a sleeve portion wrapped around a bottom portion of the core portion and in sealing engagement with the through-hole.

3. The shut-off valve of claim 2 wherein the bushing portion is a rubber material and is over-molded to the bottom of the core portion with a one-time vulcanization molding.

4. A shut-off valve according to claim 3 wherein the bottom of the bushing portion has annular projections which are coaxially distributed with the through holes, and the bottom of the annular projections has a cambered surface structure and is in sealing engagement with the open end surfaces of the through holes.

5. The shut-off valve of claim 4 wherein the core comprises a guide portion and a plug portion, the top of the guide portion is slidably disposed in the valve body assembly, a threaded hole is formed in the top end surface of the guide portion, the bottom of the valve stem is threadedly mounted in the threaded hole, the plug portion is disposed at the bottom of the guide portion, and the bushing portion is wrapped around the plug portion.

6. The shut-off valve of claim 5, wherein the valve body assembly comprises:

7. The shut-off valve of claim 6 wherein the top of the valve cap has a sealing plane that surrounds the perimeter of the through bore and the annular projection sealingly engages the sealing plane.

8. The shut-off valve of claim 7 wherein the top of the valve cap has a male neck, the valve stem is rotatably disposed within the male neck, and the top of the valve stem extends out to the male neck and is secured with a handle.

9. The shut-off valve of claim 8 wherein at least two O-rings are disposed between the valve stem and the inner wall of the male neck, the two O-rings being axially distributed along the valve stem.

10. The shut-off valve of claim 9 wherein the valve stem, the valve flap assembly, and the through-hole are coaxially disposed.