CN220227971U - Pressure self-sealing structure of double sealing rings - Google Patents
Pressure self-sealing structure of double sealing rings Download PDFInfo
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- CN220227971U CN220227971U CN202321547454.1U CN202321547454U CN220227971U CN 220227971 U CN220227971 U CN 220227971U CN 202321547454 U CN202321547454 U CN 202321547454U CN 220227971 U CN220227971 U CN 220227971U
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- sealing
- sealing ring
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- wedge
- double
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- 238000007789 sealing Methods 0.000 title claims abstract description 101
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 9
- 238000001125 extrusion Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Sealing Devices (AREA)
Abstract
The utility model discloses a pressure self-sealing structure of a double sealing ring, which is characterized in that the pressure self-sealing valve cover mechanism also comprises a double sealing structure arranged between a valve cover and a valve body; the double-sealing structure comprises a first sealing ring and a second sealing ring which are arranged among the valve cover, the valve body and the thrust backing ring. According to the utility model, through the arrangement of the double-sealing structure, under the normal use condition, the wedge-shaped sealing ring plays a normal sealing role, while the rectangular graphite sealing ring does not play a sealing role, but plays a role in conduction, and the extrusion force received by the thrust backing ring is transmitted to the wedge-shaped sealing ring so that the wedge-shaped sealing ring plays a sealing role; when the thermal expansion speeds of the valve body and the valve cover are different due to uneven heating, the medium leaked through the wedge-shaped sealing ring enters the upper part of the wedge-shaped sealing ring, and at the moment, the medium is blocked below the thrust backing ring through the good elastic compensation performance of the rectangular graphite sealing ring to realize secondary sealing, so that the medium is prevented from being leaked.
Description
Technical Field
The utility model relates to a valve, in particular to a pressure self-sealing structure of a double sealing ring.
Background
The pressure self-sealing structure type is widely applied to valve types such as gate valves, stop valves, check valves and the like, and particularly used in working condition environments with higher pressure grades.
As shown in figure 2 of the drawings of the specification, the valve cover is lifted by bolts and nuts to press the wedge-shaped sealing ring, and the wedge-shaped sealing ring is pressed after being blocked by the segment ring and the thrust backing ring to realize the pressing seal; when the valve is in operation, the pressure of medium in the valve body is increased, and the pressure acts on the valve cover, so that the valve cover has a trend of outwards moving in the axial direction, and the wedge-shaped sealing ring is tightly pressed, thereby achieving the effect of self-tightening sealing; the higher the pressure in the valve body, the greater the sealing force and the more reliable the seal.
However, because the field use environments are quite different, the valve sealing effect of some application working conditions is not ideal, and the leakage problem is easy to occur; for example: when the valve works in an environment with frequent medium temperature change, and the medium temperature rises rapidly, the valve body is heated and expands rapidly, the valve cover and the wedge-shaped sealing ring expand at a lower speed when being heated, and a small amount of leakage is easily caused; after the temperatures of the valve body, the valve cover and the like are converged, the leakage amount gradually decreases until the leakage amount disappears; after long-time operation, along with the increase of leakage times, leakage can produce the washing away at wedge sealing washer and valve body inner chamber, and especially wedge sealing washer generally adopts softer material, and the damage can be comparatively obvious, and the wedge sealing washer of damage can cause the outer condition of leaking of valve to appear. For this purpose, a pressure self-sealing structure of a double sealing ring is proposed.
Disclosure of Invention
The utility model aims to solve the problems and provides a pressure self-sealing structure of a double sealing ring.
In order to achieve the aim, the utility model provides a pressure self-sealing structure of a double sealing ring, which comprises a valve body and a pressure self-sealing valve cover mechanism arranged on the valve body, wherein the valve cover mechanism comprises a valve cover, a segmented ring arranged between the valve cover and the valve body and a thrust backing ring; the valve cover mechanism is characterized by also comprising a double sealing structure arranged between the valve cover and the valve body; the double-sealing structure comprises a first sealing ring and a second sealing ring which are arranged among the valve cover, the valve body and the thrust backing ring.
Further preferably, the first sealing ring is a wedge-shaped sealing ring, and the second sealing ring is a rectangular graphite sealing ring with elastic compensation performance.
According to the utility model, through the arrangement of the double-sealing structure, under the normal use condition, the wedge-shaped sealing ring plays a normal sealing role, while the rectangular graphite sealing ring does not play a sealing role, but plays a role in conduction, and the extrusion force received by the thrust backing ring is transmitted to the wedge-shaped sealing ring so that the wedge-shaped sealing ring plays a sealing role; when the thermal expansion speeds of the valve body and the valve cover are different due to uneven heating, the medium leaked through the wedge-shaped sealing ring enters the upper part of the wedge-shaped sealing ring, and at the moment, the medium is blocked below the thrust backing ring through the good elastic compensation performance of the rectangular graphite sealing ring to realize secondary sealing, so that the medium is prevented from being leaked.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
fig. 2 is a schematic diagram of the original structure in the background of the utility model.
Legend description: 1. a valve body; 2. a valve cover mechanism; 3. a valve cover; 4. a segment ring; 5. a thrust backing ring; 6. a double seal structure; 7. a first sealing ring; 8. and a second sealing ring.
Description of the embodiments
The following describes a pressure self-sealing structure of a double seal ring according to the present utility model with reference to the accompanying drawings.
Referring to fig. 1-2, a pressure self-sealing structure of a double sealing ring comprises a valve body 1 and a pressure self-sealing valve cover mechanism 2 arranged on the valve body 1, wherein the valve cover mechanism 2 comprises a valve cover 3, a segmented ring 4 arranged between the valve cover 3 and the valve body 1 and a thrust backing ring 5; the valve cover mechanism 2 is characterized by also comprising a double sealing structure 6 arranged between the valve cover 3 and the valve body 1; the double-sealing structure 6 comprises a first sealing ring 7 and a second sealing ring 8 which are arranged among the valve cover 3, the valve body 1 and the thrust washer 5;
the first sealing ring 7 is a wedge-shaped sealing ring, and the second sealing ring 8 is a rectangular graphite sealing ring with elastic compensation performance;
through the arrangement of the double sealing structure 6, under the normal use condition, the wedge-shaped sealing ring plays a normal sealing role, while the rectangular graphite sealing ring does not play a sealing role, but plays a role in conduction, and the extrusion force received by the thrust backing ring 5 is transmitted to the wedge-shaped sealing ring so that the wedge-shaped sealing ring plays a sealing role; when the thermal expansion speeds of the valve body 1 and the valve cover 3 are different due to uneven heating, the medium leaked through the wedge-shaped sealing ring enters the upper part of the wedge-shaped sealing ring, and at the moment, the medium is blocked below the thrust backing ring 5 through the good elastic compensation performance of the rectangular graphite sealing ring to realize secondary sealing, so that the medium is prevented from being leaked.
The scope of protection of the present utility model is not limited to the above embodiments and variations thereof. Conventional modifications and substitutions by those skilled in the art based on the content of the present embodiment fall within the protection scope of the present utility model.
Claims (2)
1. The pressure self-sealing structure of the double sealing ring comprises a valve body (1) and a pressure self-sealing valve cover mechanism (2) arranged on the valve body (1), wherein the valve cover mechanism (2) comprises a valve cover (3), a segmented ring (4) arranged between the valve cover (3) and the valve body (1) and a thrust backing ring (5); the valve cover mechanism (2) is characterized by also comprising a double sealing structure (6) arranged between the valve cover (3) and the valve body (1); the double-sealing structure (6) comprises a first sealing ring (7) and a second sealing ring (8) which are arranged among the valve cover (3), the valve body (1) and the thrust backing ring (5).
2. The pressure self-sealing structure of a double seal ring according to claim 1, wherein: the first sealing ring (7) is a wedge-shaped sealing ring, and the second sealing ring (8) is a rectangular graphite sealing ring with elastic compensation performance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321547454.1U CN220227971U (en) | 2023-06-16 | 2023-06-16 | Pressure self-sealing structure of double sealing rings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321547454.1U CN220227971U (en) | 2023-06-16 | 2023-06-16 | Pressure self-sealing structure of double sealing rings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227971U true CN220227971U (en) | 2023-12-22 |
Family
ID=89171673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321547454.1U Active CN220227971U (en) | 2023-06-16 | 2023-06-16 | Pressure self-sealing structure of double sealing rings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227971U (en) |
-
2023
- 2023-06-16 CN CN202321547454.1U patent/CN220227971U/en active Active
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