CN215981266U

CN215981266U - Sealing structure and ball valve with same

Info

Publication number: CN215981266U
Application number: CN202122388848.4U
Authority: CN
Inventors: 董天盛; 孙栓
Original assignee: Guangdong Liansu Technology Industrial Co Ltd
Current assignee: Guangdong Liansu Technology Industrial Co Ltd
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2022-03-08
Anticipated expiration: 2031-09-29

Abstract

The utility model belongs to the technical field of ball valves, and particularly relates to a sealing structure and a ball valve with the sealing structure, which comprise a main body and a gland connected with the main body, wherein one end of the gland, which is close to the main body, is provided with an external thread, the inner wall of the main body is provided with an internal thread which is matched with the external thread, one end of the main body, which is close to the gland, is provided with a mounting hole connected with the internal thread, the shapes of the external thread and the internal thread are both zigzag, the periphery of the gland is provided with an annular convex part which limits the main body to move, a groove is formed between the annular convex part and the external thread, a sealing ring which is extruded by the inner wall of the mounting hole is arranged in the groove, the type of the thread is adjusted from the original triangle to the zigzag by adopting the zigzag thread when the thread is connected, so that the included angle between the meshing surface of the main body and the gland and the axial line is increased when the thread is meshed, and the risk that the gland slips and retreats when the ball valve is subjected to external force is reduced, thereby increasing the connection strength thereof.

Description

Sealing structure and ball valve with same

Technical Field

The utility model belongs to the technical field of ball valves, and particularly relates to a sealing structure and a ball valve with the same.

Background

PVC-U single-handle ball valve in the existing market is because the handle is the metal, length is longer, switching torque is little, high durability and convenient use, more and more users like the use, each accessories in the single-handle ball valve needs the equipment, wherein ball valve main part and gland pass through ordinary threaded connection, the ball valve main part is connected with bearing strength and sealed requirement with the gland, must satisfy the index of performance "resistant internal pressure intensity" among the national standard, so scribble the adhesive in gland screw thread department and advance sealed, the internal thread of main part and the external screw thread bonding of gland are in the same place like this, intensity just can improve, can not deviate from during experimental test.

Chinese patent with application number CN202021158261.3 discloses a screwed joint with sealing ring and oil well pipe column, including interconnect's pin thread and box, wherein pin thread and box adopt threaded connection to install the sealing ring additional in the junction and promote sealing performance, nevertheless skid easily when seal structure one side receives external force and retreat, and then lead to connection structure's leakproofness to reduce.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a sealing structure and a ball valve with the same, and aims to solve the problems that the existing sealing structure is poor in sealing effect, one side of the sealing structure is easy to slip and retreat when being subjected to external force, the thread type is triangular thread, the thread connection strength is low, and the sealing performance is insufficient.

The utility model is realized in such a way that the sealing structure comprises a main body and a gland connected with the main body, wherein one end of the gland, which is close to the main body, is provided with an external thread, the inner wall of the main body is provided with an internal thread which is matched with the external thread, one end of the main body, which is close to the gland, is provided with a mounting hole connected with the internal thread, the shapes of the external thread and the internal thread are both zigzag, an annular convex part for limiting the main body to move is distributed on the periphery of the gland, a groove is formed between the annular convex part and the external thread, and a sealing ring extruded by the inner wall of the mounting hole is arranged in the groove.

According to the sealing structure, the sawtooth-shaped threads are adopted during threaded connection, and the type of the threads is adjusted from the original triangular shape to the sawtooth shape, so that the included angle between the meshing surface of the main body and the gland and the axis is increased during meshing of the threads, and the connection strength of the sealing structure is further increased; the sealing ring is convenient to seal in a radial extrusion mode by arranging the annular convex part and the groove, so that the sealing mode of a traditional thread part gluing adhesive is replaced, the risk that the gland of the ball valve slips and retreats when external force is applied is reduced, the sealing performance of the ball valve is improved when the threaded connection strength is increased, and the ball valve is more convenient and reliable to use.

Preferably, an angle between an occlusal surface formed by the external thread and the internal thread and the axis of the body is 80 to 90 degrees.

Preferably, the annular protrusion comprises a first protrusion and a second protrusion connected with each other, and the groove is opened between the external thread and the first protrusion.

Preferably, the diameter of the first protrusion is smaller than the inner diameter of the mounting hole, and the mounting hole is sleeved outside the first protrusion.

Preferably, the diameter of the second bulge is larger than that of the first bulge, and a gap is reserved between the second bulge and the end part of the main body.

Preferably, the axial width of the groove is larger than the section diameter of the sealing ring, and the radial length between the bottom surface of the groove and the inner wall of the mounting hole is smaller than the section diameter of the sealing ring.

The utility model also provides a ball valve, which comprises a valve core, a valve rod and the sealing structure according to any one of claims, wherein the valve core is arranged in the main body, the main body is provided with a positioning hole for installing the valve rod, one end of the valve rod penetrates through the positioning hole to be connected with the valve core, and the main body and the interior of the gland are both provided with sockets for connecting pipes.

According to the ball valve, the sealing structure is additionally arranged on the ball valve, so that the connection sealing between the main body and the gland is convenient to ensure, the use is more convenient by arranging the valve core and the valve rod, the risk of slipping caused by axial force on the main body is reduced by the aid of the additional arrangement of the sealing structure, and the sealing effect of the ball valve is further ensured.

Preferably, a first positioning member is arranged inside the gland, and a first gasket groove for installing a gasket is formed between the side surface of the first positioning member and the valve core.

Preferably, a second positioning part is arranged in the main body, a second gasket groove for installing a gasket is formed between the side surface of the second positioning part and the valve core, and the first gasket groove and the second gasket groove are symmetrically arranged on two sides of the valve core.

Preferably, the other end of the valve rod is connected with a handle.

Compared with the prior art, the utility model has the beneficial effects that: the zigzag threads are adopted during threaded connection processing, and the type of the threads is adjusted from the original triangle to zigzag, so that the included angle between the meshing surface of the main body and the gland and the axis is increased when the threads are meshed, the risk that the gland slips and retreats when the ball valve is subjected to external force is reduced, and the connection strength of the ball valve is further increased; the annular convex part and the groove are arranged, so that the sealing ring is sealed in a radial extrusion mode, the traditional sealing mode of gluing an adhesive at the thread part is replaced, the sealing performance of the ball valve is improved while the thread connection strength is increased, and the ball valve is more convenient and reliable to use.

Drawings

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

FIG. 2 is a schematic structural view of a main body of a sealing structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a gland of a sealing structure according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a ball valve according to an embodiment of the present invention;

fig. 5 provides an exploded view of a ball valve according to an embodiment of the present invention.

In the drawings: the valve comprises a main body 1, a gland 2, an external thread 3, an internal thread 4, an annular convex part 5, a first convex part 501, a second convex part 502, a groove 6, a sealing ring 7, a valve rod 8, a handle 9, a positioning hole 10, a first positioning part 11, a second positioning part 12, a first gasket groove 13, a second gasket groove 14, a round hole 15, a gasket 16, a valve core 17, a pipe body 18 and a biting surface 19.

Detailed Description

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

Specific implementations of the present invention are described in detail below with reference to specific embodiments.

Example 1

As shown in fig. 1-3, a structure diagram of a sealing structure provided for an embodiment of the present invention includes a main body 1 and a gland 2 connected to the main body 1, wherein an external thread 3 is formed at one end of the gland 2 close to the main body 1, an internal thread 4 matched with the external thread 3 is formed on an inner wall of the main body 1, a mounting hole 15 connected to the internal thread 4 is formed at one end of the main body 1 close to the gland 2, the external thread 3 and the internal thread 4 are both in a zigzag shape, an annular protrusion 5 for limiting the movement of the main body 1 is disposed on the outer periphery of the gland 2, a groove 6 is formed between the annular protrusion 5 and the external thread 3, and a sealing ring 7 extruded by the inner wall of the mounting hole 15 is mounted inside the groove 6.

In practical application, the zigzag threads are adopted during threaded connection, and the type of the threads is adjusted from the original triangle to zigzag, so that the included angle between the occlusal surface 19 of the main body 1 and the gland 2 and the axis is increased when the threads are occluded, the risk that the gland 2 slips and retreats when the ball valve is subjected to external force is reduced, and the connection strength of the ball valve is further increased; the annular convex part 5 and the groove 6 are arranged, so that the sealing ring 7 is sealed in a radial extrusion mode, the traditional sealing mode of gluing an adhesive at the thread part is replaced, the sealing performance of the ball valve is improved while the thread connection strength is increased, and the ball valve is more convenient and reliable to use.

Specifically, an angle between a meshing surface 19 formed by the external thread 3 and the internal thread 4 and the axis of the main body 1 is 80-90 degrees, the axial width of the groove 6 is larger than the section diameter of the sealing ring 7, and the radial length between the bottom surface of the groove 6 and the inner wall of the mounting hole 15 is smaller than the section diameter of the sealing ring 7.

This embodiment is when practical application, forms the angle between occlusal surface and the 1 axis of main part through increase external screw thread 3 and internal thread 4, and then the interlock intensity between the screw thread is stronger, guarantees gland 2 greatly and does not skid and back, is greater than through the axial length that sets up recess 6 sealing washer 7 cross-sectional diameter to guarantee that sealing washer 7 has sufficient space extrusion to extend when the pressurized, and then form radial sealed, further promoted the sealing performance of ball valve.

Further, the annular protrusion 5 includes a first protrusion 501 and a second protrusion 502 connected to each other, and the groove 6 is opened between the external thread 3 and the first protrusion 501.

Furthermore, the diameter of the first protrusion 501 is smaller than the inner diameter of the mounting hole 15, the mounting hole 15 is sleeved outside the first protrusion 501, the diameter of the second protrusion 502 is larger than the diameter of the first protrusion 501, and a gap is left between the second protrusion 502 and the end of the main body 1.

It can be known that, the internal diameter that is less than mounting hole 15 through the diameter of first arch 501 is convenient for guarantee that first arch 501 extrudes sealing washer 7 with the cooperation of main part 1, leaves the clearance through leaving between protruding 502 of second and the main part 1 tip simultaneously, has guaranteed that main part 1 receives axial force to produce when skidding and retreating, and sealing washer 7 still is in the inside of recess 6, has further guaranteed the sealed effect between main part 1 and the gland 2.

Example 2

As shown in fig. 4-5, this embodiment is an embodiment of a ball valve, and includes the sealing structure described in embodiment 1, the valve core 17 is disposed in the main body 1, the main body 1 is provided with a positioning hole 10 for installing the valve rod 8, one end of the valve rod 8 passes through the positioning hole 10 to be connected to the valve core 17, and sockets for connecting pipes are disposed inside the main body 1 and the gland 2.

Specifically, a first positioning member 11 is disposed inside the gland 2, a first gasket groove 13 for mounting a gasket 16 is formed between a side surface of the first positioning member 11 and the valve element 17, and the first gasket groove 13 is mounted inside the gland 2, so that a sealing member is conveniently mounted on the valve element 7, and the valve element is fixed by the first positioning member 11.

Further, a second positioning part 12 is arranged inside the main body 1, a second gasket groove 14 for installing a gasket 16 is formed between the side face of the second positioning part 12 and the valve core 17, the first gasket groove 13 and the second gasket groove 14 are symmetrically arranged on two sides of the valve core 17, the sealing ring 7 is conveniently extruded by arranging a round hole 15 on the inner wall of the main body 1, so that the sealing ring is fixed inside the groove 6, the sealing effect is further ensured, and the sealing part additionally arranged on the valve core 7 from the other side is conveniently fixed by additionally arranging the second positioning part 12 and the second gasket groove 14 inside the main body 1.

Further, the other end of the valve rod 8 is connected with a handle 9.

Exemplarily, first setting element 11 can be first location muscle, and second setting element 12 can be second location muscle or the holding ring, and its material can be selected as required to seal case 7, and then promoted the sealing performance of valve, set up the bellmouth through the inside at main part 1 and gland 2, be convenient for be connected with tubular product, use convenient and reliable more.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a seal structure, includes main part (1) and gland (2) that link to each other with main part (1), external screw thread (3) have been seted up to gland (2) one end that is close to main part (1), and internal thread (4) that set up with external screw thread (3) cooperation are seted up to the inner wall of main part (1), and mounting hole (15) that meet with internal thread (4) are seted up to the one end that main part (1) is close to gland (2), its characterized in that, the shape of external screw thread (3) and internal thread (4) is the zigzag, annular convex part (5) that restriction main part (1) removed are laid to the periphery of gland (2), form between annular convex part (5) and external screw thread (3) recess (6), the internally mounted of recess (6) has receiving mounting hole (15) inner wall extruded sealing washer (7).

2. A sealing arrangement according to claim 1, characterised in that the angle between the mating surface (19) formed by the external thread (3) and the internal thread (4) and the axis of the body (1) is 80-90 degrees.

3. A sealing arrangement according to claim 1, characterised in that the annular projection (5) comprises a first projection (501) and a second projection (502) which are connected to each other, the recess (6) opening between the external thread (3) and the first projection (501).

4. A sealing arrangement according to claim 3, characterised in that the diameter of the first projection (501) is smaller than the inner diameter of the mounting hole (15), the mounting hole (15) being arranged to fit over the outside of the first projection (501).

5. A sealing arrangement according to claim 3, characterised in that the diameter of the second projection (502) is larger than the diameter of the first projection (501), and that a gap is left between the second projection (502) and the end of the body (1).

6. A sealing arrangement according to claim 1, characterised in that the axial width of the groove (6) is greater than the cross-sectional diameter of the sealing ring (7), and the radial length between the bottom surface of the groove (6) and the inner wall of the mounting hole (15) is smaller than the cross-sectional diameter of the sealing ring (7).

7. A ball valve is characterized by comprising a valve core (17), a valve rod (8) and a sealing structure according to any one of claims 1 to 6, wherein the valve core (17) is arranged in a main body (1), a positioning hole (10) for installing the valve rod (8) is formed in the main body (1), one end of the valve rod (8) penetrates through the positioning hole (10) to be connected with the valve core (17), and sockets for connecting pipes are formed in the main body (1) and the gland (2).

8. A ball valve according to claim 7, characterized in that the interior of the gland (2) is provided with a first retainer (11), and a first gasket groove (13) for mounting a gasket (16) is formed between the side surface of the first retainer (11) and the spool (17).

9. The ball valve according to claim 8, wherein a second positioning member (12) is arranged inside the main body (1), a second gasket groove (14) for installing a gasket (16) is formed between the side surface of the second positioning member (12) and the valve core (17), and the first gasket groove (13) and the second gasket groove (14) are symmetrically arranged on two sides of the valve core (17).

10. A ball valve according to any one of claims 7 to 9, characterized in that a handle (9) is connected to the other end of the valve stem (8).