CN216479026U

CN216479026U - Sealing gasket structure and gate valve special for yellow river water

Info

Publication number: CN216479026U
Application number: CN202123100623.0U
Authority: CN
Inventors: 吴进武; 刘杰
Original assignee: Shanghai East Well Valve Co ltd
Current assignee: Shanghai East Well Valve Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-05-10
Anticipated expiration: 2031-12-10

Abstract

The utility model relates to a sealing gasket structure, which comprises a ring groove, a split ring, a sealing ring and a sealing ring pressing ring; the thickness of the splitting ring is smaller than the width of the ring groove, the splitting ring is installed at the groove bottom of the ring groove and is composed of multiple sections, and the splitting ring abuts against the groove wall of the ring groove. The groove wall against which the split ring abuts is provided with a limiting part for limiting the outward movement of the split ring; the sealing ring is abutted against the groove wall with the limiting part, the bottom of the sealing ring is abutted against the split ring, and the top of the sealing ring overflows from the notch of the ring groove; the two sides of the bottom of the sealing ring pressing ring are respectively abutted against the groove wall of the split ring and the groove wall far away from the limiting part, and the middle of the sealing ring pressing ring is pressed on the sealing ring and the split ring. In addition, a gate valve special for yellow river water is also provided. Above-mentioned sealed structure of filling up and yellow river water special gate valve cuts open the ring and the sealing washer clamping ring is fixed, makes the sealing washer can be firm installs in the disk seat annular to it is fixed through the spacing portion joint that is located the annular lateral wall, realizes sealed quick convenient dismouting of filling up structure, and use cost is low.

Description

Sealing gasket structure and gate valve special for yellow river water

Technical Field

The utility model relates to a gate valve sealing field especially relates to a sealed pad structure and special gate valve of yellow river.

Background

The opening and closing piece of the gate valve is a gate plate, the moving direction of the gate plate is perpendicular to the fluid direction, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate has two sealing surfaces and the most common mode is that the two sealing surfaces of the gate form a wedge shape, the wedge angle varying with the valve parameters, typically 5 degrees. The gate plate of the wedge gate valve can be made into a whole, which is called a rigid gate plate; the gate plate can also be made into a gate plate capable of generating micro deformation so as to improve the manufacturability of the gate plate and compensate the deviation of the angle of the sealing surface in the machining process, and the gate plate is called an elastic gate plate. When the gate valve is closed, the sealing surface can be sealed only by medium pressure, namely, the sealing surface of the gate plate is pressed to the valve seat on the other side by the medium pressure to ensure the sealing of the sealing surface, namely, the gate valve is self-sealed. Most gate valves are forcedly sealed, namely, when the valves are closed, the gate plates are forced to press the valve seats by external force so as to ensure the sealing performance of the sealing surfaces. The gate plate of the gate valve moves linearly along with the valve rod, and is called a lifting rod gate valve and a rising rod gate valve. Usually, the lifting rod is provided with trapezoidal threads, and the rotating motion is changed into the linear motion, namely the operation torque is changed into the operation thrust force through a nut at the top end of the valve and a guide groove on the valve body. When the valve is opened, when the lifting height of the flashboard is equal to the drift diameter of the valve, the passage of the fluid is completely unblocked.

A gate valve for silt particle quality of water operating mode has multiple pattern seal structure, is hard seal structure and soft seal structure commonly used. The sand grains that hard seal structure is detained when the flashboard is opened and close are at sealed face extrusion grinding, cause sealed face easy wearing and tearing and fish tail, need change whole valve during the maintenance, and use cost is higher. The other type is a soft seal flat gate valve, a soft seal valve seat and a hard surface flashboard are adopted, the valve seat is replaceable, the abrasion condition of a sealing surface is improved during use, but the flat gate valve has no abrasion compensation function, the valve seat still needs to be frequently replaced, and the use cost is still high. And the sealing surface of the wedge gate valve has a wear compensation function. Compared with a flat gate valve, the valve seat of the wedge gate valve is more difficult to install, fix and replace. There has been no wedge gate valve product that can replace the valve seat. The utility model discloses a fine solution of disk seat structure the disk seat installation of wedge gate valve, fixed and the difficult problem of change. The difficult problems that the inside of the wedge gate valve is difficult to drill and the valve seat is difficult to fix by screws are also solved.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide a gasket structure and a gate valve for yellow river water, which are easy to replace and low in use cost.

A sealing gasket structure comprises a ring groove, a split ring, a sealing ring and a sealing ring pressing ring; the thickness of the split ring is smaller than the width of the annular groove, the split ring is installed at the groove bottom of the annular groove and consists of a plurality of sections, the split ring abuts against the groove wall of the annular groove, and the groove wall abutting against the split ring is provided with a limiting part used for limiting the outward movement of the split ring; the sealing ring is abutted against a groove wall with a limiting part, the bottom of the sealing ring is abutted against the dissecting ring, and the top of the sealing ring overflows from a notch of the ring groove; the two sides of the bottom of the sealing ring pressing ring respectively abut against the split ring and the groove wall far away from the limiting part, the middle part of the sealing ring pressing ring is pressed on the sealing ring and the split ring, and the top end of the sealing ring pressing ring is lower than the overflow end of the sealing ring; the sealing ring pressing ring is fixed on the split ring.

Furthermore, the split ring is composed of at least 3 sections, and adjacent sections are connected end to form a complete circular ring.

Furthermore, the limiting part is an annular inner flange.

Furthermore, the bottom of the sealing ring is clamped between the sealing ring pressing ring and the cutting ring.

Furthermore, the inner side of the bottom of the sealing ring is provided with a protruding part, and the sealing ring pressing ring is pressed on the protruding part.

Furthermore, the sealing ring pressing ring is fixed on the dissecting ring through a fastener.

Furthermore, the fastener is a fastening screw, and the sealing ring pressing ring is an annular sealing ring pressing ring.

Further, the notch outer edge of annular groove has heavy platform, the top of sealing washer has the annular outer flange that extends to the circle outward, annular outer flange bear in heavy bench is last.

The utility model provides a yellow river water special gate valve, includes disk seat and flashboard, still includes foretell sealed pad structure, the annular sets up on the sealed face of disk seat, when the flashboard was closed, the flashboard extrusion sealed pad structure completion is sealed.

Furthermore, the gate valve is a wedge gate valve, and the sealing surfaces on the two sides of the valve seat are provided with the gate valve sealing gasket structures.

The sealing gasket structure and the gate valve special for yellow river water are fixed by the split ring and the sealing ring pressing ring, so that the sealing ring can be firmly installed in the annular groove of the valve seat, and is clamped and fixed by the limiting part positioned on the side wall of the annular groove, the sealing gasket structure is quickly and conveniently disassembled, and the use cost is low.

Through adopting the sealing gasket structure that can be convenient for change as sealed, avoided adopting when sealed hard to change whole platform gate valve, reduced user's operation cost by a wide margin.

Wearing and tearing a little bit by a waterstone compensation function through the sealed face of wedge gate valve has prolonged the replacement cycle again.

Drawings

FIG. 1 is a schematic sectional view of a gate valve;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a cross-sectional view of fig. 2.

In the figure: 100. a valve seat; 110. a sealing surface; 120. a limiting part; 200. opening the ring; 300. a seal ring; 400. pressing a sealing ring; 500. a gate plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, 2 and 3, in one embodiment, a gasket structure includes a ring groove, a split ring 200, a sealing ring 300 and a sealing ring pressing ring 400; the thickness of the split ring 200 is smaller than the width of the ring groove, the split ring 200 is installed at the groove bottom of the ring groove and is composed of a plurality of sections, the split ring 200 abuts against the groove wall of the ring groove, and the groove wall abutting against the split ring 200 is provided with a limiting part 120 for limiting the outward movement of the split ring 200; the sealing ring 300 is abutted against the groove wall with the limiting part 120, the bottom of the sealing ring 300 is abutted against the open ring 200, and the top of the sealing ring overflows from the notch of the groove; two sides of the bottom of the sealing ring pressing ring 400 respectively abut against the dissecting ring 200 and the groove wall far away from the limiting part 120, the middle part of the sealing ring pressing ring 400 is pressed on the sealing ring 300 and the dissecting ring 200, and the top end is lower than the overflow end of the sealing ring 300; the seal ring pressing ring 400 is fixed on the split ring 200.

When the split ring 200 is used, the split ring 200 is arranged at the bottom of the ring groove and is clamped between the limiting part 120 and the bottom of the ring groove, the sealing ring 300 and the sealing ring pressing ring 400 are sequentially arranged in the ring groove, and then the sealing ring pressing ring 400 and the split ring 200 are fixed together.

The sealing gasket structure is characterized in that the cutting ring 200 and the sealing ring pressing ring 400 are fixed, so that the sealing ring 300 can be firmly installed in the annular groove of the valve seat and clamped and fixed by the limiting part 120 located on the side wall of the annular groove, the sealing gasket structure can be quickly and conveniently disassembled and assembled, and the use cost is low.

In this embodiment, the split ring 200 is composed of 3-5 segments, and the adjacent segments are connected end to form a complete ring. Considering that the split ring has certain rigidity, in order to facilitate smooth installation, the split ring 200 is divided into 3-5 sections, preferably 4 sections, and then the split ring is installed, and after installation, the adjacent sections are connected end to end, so that the split ring 200 is more stable.

In the present embodiment, the position-limiting portion 120 is an annular inner flange. The inner flange ensures that the split ring 200 or the seal ring 300 is tightly attached to the limiting part 120, and the installation is stable and accurate. The plurality of protrusions not only stabilize the installed split ring 200 or the seal ring 300, but also facilitate the disassembly of the split ring 200 or the seal ring 300.

In this embodiment, the bottom of the seal ring 300 is clamped between the seal ring pressing ring 400 and the cut-open ring 200. The inner side of the bottom of the packing 300 has a protrusion on which the packing pressing ring 400 is pressed. So that the sealing ring 300 is not easily loosened when being fixed in the ring groove.

In this embodiment, the end of the sealing ring 300 protruding out of the ring groove is set to be an arc surface or a corrugated arc surface, and both ends of the arc surface or the corrugated arc surface are located in the ring groove. Smooth movement of the external member when contacting the packing 300 is ensured, and the contact area of the packing 300 and the external member is increased.

In this embodiment, the packing follower 400 is secured to the split ring 200 by a fastener. The fastener is a fastening screw. The brake valve is convenient to disassemble and assemble, does not need to punch on the brake valve body, and is low in use cost. The 400 sealing ring pressing ring is an annular sealing ring pressing ring.

In this embodiment, the outer edge of the notch of the ring groove has a sunken platform, and the top of the sealing ring 300 has an external annular flange extending outward from the ring, and the external annular flange is supported on the sunken platform. The contact area of the seal ring 300 is increased, and the stability of the seal ring 300 is maintained.

On the basis of the above sealing gasket structure, the embodiment further provides a gate valve special for yellow river water, which comprises a valve seat 100 and a gate plate 500, and further comprises the above sealing gasket structure, wherein the ring groove is formed in the sealing surface 110 of the valve seat 100, and when the gate plate 500 is closed, the gate plate 500 extrudes the sealing gasket structure to complete sealing.

Above-mentioned yellow river water special gate valve adopts the sealed pad structure that can be convenient for change as sealed, has avoided adopting to change whole platform gate valve when sealing firmly, has reduced user's operation cost by a wide margin.

In this embodiment, the gate valve is a wedge gate valve, and the sealing surfaces 110 on both sides of the valve seat 100 are provided with gate valve sealing gaskets.

When the gate plate 500 is inserted into the flow passage, the flow passage is blocked, and the sealing ring 300 is attached to the gate plate 500 to seal the flow passage; when sealing washer 300 receives the wearing and tearing back, the position that the flashboard was located when originally sealing has been difficult to reach ideal sealed effect because of the sealing washer wearing and tearing, and the runner that originally is blocked can have the gap, can continue to impel flashboard 500 this moment, makes the thicker position of wedge flashboard replace original thinner position, and the flashboard further extrudees sealing washer 300, makes flashboard 500 laminate with sealing washer 300 again, forms resealing to the runner.

According to the gate valve, when the sealing ring 300 is worn, the gate plate 500 can continue to be pushed into the flow channel, so that the gate plate is attached to the sealing ring 300 again, and wear compensation is achieved. The service life is prolonged, after the compensation amount is used up, the sealing ring 300 can be replaced, and the valve seat 100 can be easily removed during replacement, so that the valve seat is very convenient.

The structure has the advantages that the valve seat 100 assembly can be firmly installed on the valve seat 100 only by turning a ring groove without drilling, tapping and screws in the valve seat 100. The common process can not drill holes mainly due to the limitation of the structure. Similarly, the valve seat 100 assembly can be disassembled simply and conveniently, and the valve seat 100 can be taken out for replacement only by loosening the screws.

Above-mentioned gate valve adopts the wedge structure, and cooperation sealing washer 300 has sealed wearing and tearing compensation function to make its replacement cycle than the plate valve longer. Meanwhile, the wedge gate valve is shorter than a flat gate valve, so that the wedge gate valve is more favorable for installation in a narrow space.

The arrangement of the wedge-shaped structure is mainly used for solving the problem that the difference of the flat plate structure cannot be compensated.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A sealing gasket structure is characterized by comprising a ring groove, a split ring, a sealing ring and a sealing ring pressing ring; the thickness of the split ring is smaller than the width of the annular groove, the split ring is installed at the groove bottom of the annular groove and consists of a plurality of sections, the split ring abuts against the groove wall of the annular groove, and the groove wall abutting against the split ring is provided with a limiting part used for limiting the outward movement of the split ring; the sealing ring is abutted against the groove wall with the limiting part, the bottom of the sealing ring is abutted against the split ring, and the top of the sealing ring overflows from the notch of the ring groove; the two sides of the bottom of the sealing ring pressing ring respectively abut against the split ring and the groove wall far away from the limiting part, the middle part of the sealing ring pressing ring is pressed on the sealing ring and the split ring, and the top end of the sealing ring pressing ring is lower than the overflow end of the sealing ring; the sealing ring pressing ring is fixed on the split ring.

2. The gasket structure of claim 1, wherein said split ring is comprised of at least 3 segments, with adjacent segments joined end to form a complete ring.

3. The gasket structure according to claim 1, wherein the stopper portion is an annular inner flange.

4. The gasket construction of claim 1 wherein the bottom portion of the gasket is captured between the gasket pressing ring and the split ring.

5. The gasket structure according to claim 4, wherein the gasket has a protrusion on an inner side of a bottom portion thereof, and the gasket pressing ring is pressed against the protrusion.

6. The gasket structure of claim 1, wherein the gasket pressing ring is fixed to the split ring by a fastener.

7. The gasket structure according to claim 6, wherein the fastening member is a fastening screw, and the pressing ring is annular.

8. The gasket construction of claim 4 wherein the outer edge of the groove of the ring groove has a counter-sunk surface, and the top of the gasket has an external annular flange extending outwardly of the ring, the external annular flange being carried on the counter-sunk surface.

9. A gate valve special for yellow river water, comprising a valve seat and a gate plate, and further comprising a sealing gasket structure according to any one of claims 1 to 8, wherein the annular groove is formed in a sealing surface of the valve seat, and when the gate plate is closed, the gate plate extrudes the sealing gasket structure to complete sealing.

10. The gate valve special for yellow river water according to claim 9, wherein the gate valve is a wedge gate valve, and sealing surfaces on two sides of the valve seat are provided with the gate valve sealing gasket structures.