CN211924901U - Self-sealing stop valve - Google Patents
Self-sealing stop valve Download PDFInfo
- Publication number
- CN211924901U CN211924901U CN202020410292.7U CN202020410292U CN211924901U CN 211924901 U CN211924901 U CN 211924901U CN 202020410292 U CN202020410292 U CN 202020410292U CN 211924901 U CN211924901 U CN 211924901U
- Authority
- CN
- China
- Prior art keywords
- valve
- pressure medium
- valve rod
- sealing
- mounting part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 31
- 238000012856 packing Methods 0.000 claims description 5
- 210000004907 gland Anatomy 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 4
- 239000010865 sewage Substances 0.000 description 8
- 239000000945 filler Substances 0.000 description 5
- 241000283216 Phocidae Species 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
A self-sealing stop valve comprises a valve body, a valve cover (1), a valve rod (2) and a valve clack (3), wherein the valve body is formed by combining a high-pressure medium inlet pipeline (4), a valve rod mounting part (5) and a low-pressure medium outlet pipeline (6), the bottom of the valve rod mounting part (5) is a valve seat (7) and is provided with a high-pressure medium inlet, the top of the valve rod mounting part (5) is provided with a connecting flange, the outer wall of the valve rod mounting part (5) is provided with a low-pressure medium outlet, and the outlet end of the high-pressure medium inlet pipeline (4) is fixedly arranged on the lower part of the valve rod mounting part (5) and the pipe wall of the; the advantages are that: the force for closing the valve is small, the diameter of the valve rod can be correspondingly reduced, and the sealing performance of the valve clack is good under the pressure action of the fluid medium.
Description
Technical Field
The utility model relates to a valve field, concretely relates to self sealss stop valve.
Background
Currently, the shut-off valve is a positive seal type valve, so when the valve is closed, pressure must be applied to the valve flap to force the sealing surface not to leak. When a medium enters the valve from the lower part of the valve clack, the resistance required to be overcome by the operating force is the thrust generated by the friction force between the valve rod and the packing and the pressure of the medium, and the force for closing the valve is larger than the force for opening the valve, so the diameter of the valve rod of the existing stop valve is larger, otherwise, the valve rod buckling fault occurs, and the defect that the existing stop valve is not tight in sealing easily occurs after long-time use is overcome.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a self sealss stop valve to the aforesaid is not enough.
The utility model comprises a valve body, a valve cover, a valve rod and a valve clack,
the valve body is formed by combining a high-pressure medium inlet pipeline, a valve rod mounting part and a low-pressure medium outlet pipeline, the bottom of the valve rod mounting part is a valve seat and is provided with a high-pressure medium inlet, the top of the valve rod mounting part is provided with a connecting flange, the outer wall of the valve rod mounting part is provided with a low-pressure medium outlet,
the outlet end of the high-pressure medium inlet pipeline is fixedly arranged on the lower part of the valve rod mounting part and the pipe wall of the low-pressure medium discharge pipeline, the low-pressure medium outlet of the high-pressure medium inlet pipeline is communicated with the high-pressure medium inlet of the valve rod mounting part, the bottom of the high-pressure medium inlet pipeline protrudes downwards to form a valve clack opening accommodating area, the valve cover is in sealing connection with a flange at the top of the valve rod mounting part, the top of the valve rod is provided with a hand wheel, the valve rod is movably and hermetically arranged in the valve cover,
the valve clack is movably installed at the bottom end of the valve rod and located in the valve clack opening and containing area, the top surface of the valve clack is a sealing surface, and the valve rod drives the valve clack to be tightly pressed on the valve seat through rotating the hand wheel.
The valve cover is filled with sealing filler, and the filler gland is in sealing connection with the flange at the top of the valve cover and compresses the sealing filler; the top of valve gap is provided with a pair of valve-stem nut support frame, and the top of a pair of valve-stem nut support frame is provided with the valve-stem nut who uses with the valve rod cooperation.
The handwheel may also be a pneumatic actuator or an electric actuator.
The central line of the inlet end of the high-pressure medium inlet pipeline and the central line of the outlet end of the low-pressure medium outlet pipeline are positioned on the same horizontal plane.
The bottom of the high-pressure medium inlet pipeline is provided with a sewage discharge screw mounting hole, and the sewage discharge screw is hermetically mounted in the sewage discharge screw mounting hole through a sealing ring.
The utility model has the advantages that: the force for closing the valve is small, the diameter of the valve rod can be correspondingly reduced, and the sealing performance of the valve clack is good under the pressure action of the fluid medium.
Description of the drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic sectional view of the present invention.
Detailed Description
As shown in the attached drawings, the utility model comprises a valve body, a valve cover 1, a valve rod 2 and a valve clack 3,
the valve body is formed by combining a high-pressure medium inlet pipeline 4, a valve rod mounting part 5 and a low-pressure medium outlet pipeline 6, the bottom of the valve rod mounting part 5 is a valve seat 7 and is provided with a high-pressure medium inlet, the top of the valve rod mounting part 5 is provided with a connecting flange, the outer wall of the valve rod mounting part 5 is provided with a low-pressure medium outlet,
the outlet end of a high-pressure medium inlet pipeline 4 is fixedly arranged on the lower part of a valve rod mounting part 5 and the pipe wall of a low-pressure medium discharge pipeline 6, the low-pressure medium outlet of the high-pressure medium inlet pipeline 4 is communicated with the high-pressure medium inlet of the valve rod mounting part 5, the bottom of the high-pressure medium inlet pipeline 4 protrudes downwards to form a valve clack opening accommodating area 8, a valve cover 1 is connected with the top of the valve rod mounting part 5 in a sealing way, a hand wheel 9 is arranged at the top of a valve rod 2, the valve rod 2 is movably and hermetically arranged in the valve cover 1, the bottom of,
The valve cover 1 is filled with sealing filler, and the packing gland 10 is in flange sealing connection with the top of the valve cover 1 and compresses the sealing filler; the top of valve gap 1 is provided with a pair of valve-stem nut support frame, and the top of a pair of valve-stem nut support frame is provided with the valve-stem nut who uses with valve rod 2 cooperation.
The hand wheel 9 may also be a pneumatic actuator or an electric actuator.
The central line of the inlet end of the high-pressure medium inlet pipeline 4 and the central line of the outlet end of the low-pressure medium outlet pipeline 6 are positioned on the same horizontal plane.
The sewage draining device is also provided with a sewage draining screw 11, the bottom of the high-pressure medium inlet pipeline 4 is provided with a sewage draining screw mounting hole, and the sewage draining screw 11 is hermetically mounted in the sewage draining screw mounting hole through a sealing ring.
The working mode and principle are as follows: fluid medium enters through the inlet end of the high-pressure medium inlet pipeline 4, a worker rotates the hand wheel 9 forward to enable the valve rod 2 to drive the valve clack 3 to move downwards, the high-pressure medium inlet at the bottom of the valve rod mounting portion 5 is opened, the fluid medium is filled into the valve rod mounting portion 5 through the high-pressure medium inlet, is discharged into the low-pressure medium discharge pipeline 6 through the low-pressure medium outlet on the outer wall of the valve rod mounting portion 5, and is finally output through the low-pressure medium outlet of the low-pressure medium discharge pipeline 6.
When a pipeline needs to be cut off, a worker reversely rotates the hand wheel 9 to enable the valve rod 2 to drive the valve clack 3 to move upwards, the top sealing surface of the valve clack 3 is pressed on the end surface of the valve seat 7, the high-pressure medium inlet at the bottom of the valve rod mounting portion 5 is sealed, and medium circulation in the pipeline can be cut off. The medium pressure in the pipeline acts on the bottom surface of the valve clack 3, so that the sealing performance of the valve clack 3 is better.
When the stop valve needs to be subjected to pollution discharge, the lower pollution discharge screw 11 is twisted.
Claims (5)
1. A self-sealing stop valve is characterized by comprising a valve body, a valve cover (1), a valve rod (2) and a valve clack (3),
the valve body is formed by combining a high-pressure medium inlet pipeline (4), a valve rod mounting part (5) and a low-pressure medium outlet pipeline (6), the bottom of the valve rod mounting part (5) is a valve seat (7) and is provided with a high-pressure medium inlet, the top of the valve rod mounting part (5) is provided with a connecting flange, the outer wall of the valve rod mounting part (5) is provided with a low-pressure medium outlet,
the outlet end of a high-pressure medium inlet pipeline (4) is fixedly arranged on the lower part of a valve rod mounting part (5) and the pipe wall of a low-pressure medium discharge pipeline (6), the low-pressure medium outlet of the high-pressure medium inlet pipeline (4) is communicated with the high-pressure medium inlet of the valve rod mounting part (5), the bottom of the high-pressure medium inlet pipeline (4) protrudes downwards to form a valve clack opening and accommodating area (8), a valve cover (1) is connected with a flange at the top of the valve rod mounting part (5) in a sealing way, a hand wheel (9) is arranged at the top of a valve rod (2), the valve rod (2) is movably and hermetically arranged in the valve cover (1), the bottom of the valve rod,
the valve clack (3) is movably mounted at the bottom end of the valve rod (2) and is located in the valve clack opening and accommodating area (8), the top surface of the valve clack (3) is a sealing surface, and the valve rod (2) drives the valve clack (3) to be pressed on the valve seat (7) through rotating the hand wheel (9).
2. The self-sealing stop valve according to claim 1, characterized in that the valve cover (1) is filled with sealing packing, and the packing gland (10) is connected with the top flange of the valve cover (1) in a sealing way and compresses the sealing packing; the top of valve gap (1) is provided with a pair of valve-stem nut support frame, and the top of a pair of valve-stem nut support frame is provided with the valve-stem nut who uses with valve rod (2) cooperation.
3. A self-sealing shut-off valve according to claim 1, characterised in that the hand wheel (9) may also be a pneumatic or electric actuator.
4. A self-sealing stop valve according to claim 1, characterised in that the centre line of the inlet end of the high pressure medium inlet conduit (4) is level with the centre line of the outlet end of the low pressure medium outlet conduit (6).
5. The self-sealing stop valve according to claim 1, characterized in that it further comprises a drain screw (11), a drain screw mounting hole is formed at the bottom of the high-pressure medium inlet pipe (4), and the drain screw (11) is hermetically mounted in the drain screw mounting hole through a sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020410292.7U CN211924901U (en) | 2020-03-27 | 2020-03-27 | Self-sealing stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020410292.7U CN211924901U (en) | 2020-03-27 | 2020-03-27 | Self-sealing stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211924901U true CN211924901U (en) | 2020-11-13 |
Family
ID=73349368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020410292.7U Expired - Fee Related CN211924901U (en) | 2020-03-27 | 2020-03-27 | Self-sealing stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211924901U (en) |
-
2020
- 2020-03-27 CN CN202020410292.7U patent/CN211924901U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201113 |