CN213748912U - Large-diameter stop valve sealing performance test device - Google Patents
Large-diameter stop valve sealing performance test device Download PDFInfo
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- CN213748912U CN213748912U CN202022597691.1U CN202022597691U CN213748912U CN 213748912 U CN213748912 U CN 213748912U CN 202022597691 U CN202022597691 U CN 202022597691U CN 213748912 U CN213748912 U CN 213748912U
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Abstract
The utility model relates to a mechanical seal technical field specifically discloses a heavy-calibre stop valve leakproofness test device, and wherein export sealing device locates import sealing device's top, and the stop valve is located between export sealing device and the import sealing device. The utility model discloses the device is applicable to the experimental work of heavy-calibre stop valve leakproofness, and the device is small, easy operation, with low costs, the practicality is high.
Description
Technical Field
The utility model belongs to the technical field of mechanical seal, concretely relates to heavy-calibre stop valve leakproofness test device.
Background
Before the stop valve is actually used on site, the sealing test is required to be carried out on the stop valve, the test comprises a shell strength test and a tightness test, the valve quality is checked, and the valve can be ensured to be used on site.
In nuclear power plant, generally no specialized tool is purchased to carry out the stop valve leakproofness test, and because the both ends interface form of heavy-calibre stop valve is the groove, can't form effective seal with test platform in the testing process to cause the inaccurate, the not high problem of efficiency of leakproofness test, even have the casualties risk under the large pressure platform.
Therefore, a special tool needs to be processed to ensure the sealing between the valve and the test platform for the sealing test of the large-diameter stop valve.
Disclosure of Invention
An object of the utility model is to provide a heavy-calibre stop valve leakproofness test device to the inaccurate, the inefficiency of solution test problem.
The technical scheme of the utility model as follows:
a large-caliber stop valve tightness test device comprises an inlet sealing device and an outlet sealing device;
the outlet sealing device consists of a reinforcing ring, a conical seal and an O-shaped ring;
the vertical height of the conical groove of the conical seal is higher than that of the cut-off valve groove, so that the cut-off valve groove can be completely arranged in the conical seal;
the conical opening surface of the conical seal is in contact fit with the starting position of the groove of the stop valve;
an annular groove is processed on the conical top surface of the conical seal;
the O-shaped ring is arranged in the annular groove;
a convex circular truncated cone is processed at the center of the conical top surface of the conical seal;
the reinforcing ring is sleeved on the outer side of the conical seal;
the inlet sealing device and the outlet sealing device are different only in the conical sealing structure; a through hole is formed in the middle of the conical sealing convex circular truncated cone of the inlet sealing device and used for checking that a medium enters the stop valve;
the outlet sealing device is arranged above the inlet sealing device, and the stop valve is arranged between the outlet sealing device and the inlet sealing device.
The taper of the taper seal is 2-5 degrees smaller than that of the groove of the stop valve.
The height of both ends of the reinforcing ring is lower than that of both ends of the conical seal, so that the conical seal is prevented from being broken under the action of clamping force.
The reinforcing ring and the conical seal are in interference fit.
Two concentric annular grooves are processed on the conical top surface of the conical seal, and an O-shaped ring I and an O-shaped ring II are respectively arranged in the two annular grooves.
The conical seal is made of nylon.
The reinforcing ring is made of stainless steel.
The raised circular truncated cone of the inlet sealing device is arranged at an air inlet of the safety valve checking platform, a groove at the inlet of the stop valve is aligned with a tapered sealing groove of the inlet sealing device, a tapered sealing groove of the outlet sealing device is aligned with a groove at the outlet of the stop valve, and the raised circular truncated cone of the outlet sealing device is aligned with an upper support of the safety valve checking platform.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses the device is applicable to the experimental work of heavy-calibre stop valve leakproofness, and the device is small, easy operation, with low costs, the practicality is high.
(2) The utility model discloses the device does not rely on special test platform, utilizes current relief valve check-up platform can accomplish the heavy-calibre stop valve leakproofness test.
(3) In the leakproofness test process, adopt the utility model discloses the device can form effectively sealed between stop valve and check-up platform, guarantees that the leakproofness is experimental to go on smoothly, has improved experimental accuracy and efficiency.
(4) With the help of the utility model discloses the device, nuclear power plant has examined out that 60 not satisfied sealed requirements of platform valve, economic and unit thermal efficiency and the safety loss that arouse after having avoided the valve installation.
(5) The utility model discloses the device all has reference meaning to other types of valve seal nature test work, and scalability is strong.
Drawings
FIG. 1 is a schematic view of the construction of an outlet seal;
FIG. 2 is a schematic view of a conical seal of the inlet seal assembly;
FIG. 3 is a schematic view of a safety valve verification platform;
FIG. 4 is a schematic structural diagram of a large-caliber stop valve;
FIG. 5 is a schematic view of an inlet seal seating verification platform;
FIG. 6 is a schematic view of a check valve positioned on a safety valve verification platform;
fig. 7 is a schematic view of the sealing test.
In the figure: 1. a reinforcement ring; 2. conical sealing; 3, O-shaped ring I; and 4, an O-shaped ring II.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A large-caliber stop valve tightness test device comprises an inlet sealing device and an outlet sealing device. The outlet sealing device is arranged above the inlet sealing device, and the stop valve is arranged between the outlet sealing device and the inlet sealing device.
As shown in FIG. 1, the outlet sealing device is composed of a reinforcing ring 1, a conical seal 2, an O-ring I3 and an O-ring II 4.
The conical seal 2 is made of nylon, and the taper of the conical seal is 2-5 degrees smaller than that of the groove of the stop valve.
The vertical height of the cone groove of the cone seal 2 is 20mm higher than that of the stop valve groove, and the stop valve groove can be completely arranged in the cone seal 2.
The taper surface of the conical seal 2 is in contact fit with the starting position of the groove of the stop valve, and the groove of the stop valve and the conical seal 2 form effective seal under the clamping force action of the safety valve checking platform.
Two concentric annular grooves are processed on the conical top surface of the conical seal 2, the O-shaped ring I3 and the O-shaped ring II4 are respectively installed in the two annular grooves, and the conical seal 2 and the safety valve checking platform form effective sealing under the action of clamping force.
And a raised circular truncated cone is processed at the center of the conical top surface of the conical seal 2 and is used for positioning and centering with a safety valve checking platform.
The height of the protruding round platform is 15 mm.
The reinforcing ring 1 is made of stainless steel materials, is sleeved on the outer side of the conical seal 2 and is in interference fit with the conical seal 2.
The height of the two ends of the reinforcing ring 1 is 2mm lower than that of the two ends of the conical seal 2 respectively so as to prevent the conical seal 2 from being broken under the clamping force.
The inlet sealing device and the outlet sealing device are different only in the conical sealing structure. As shown in fig. 2, a through hole is formed in the middle of the conical sealing convex circular truncated cone of the inlet sealing device and is used for checking that a medium enters the stop valve.
As shown in fig. 3-7, the raised circular truncated cone of the inlet sealing device is arranged at the air inlet of the safety valve checking platform, and the groove at the inlet of the stop valve is aligned with the tapered sealing groove of the inlet sealing device;
the conical sealing groove of the outlet sealing device is aligned with the groove at the outlet of the stop valve, and the convex circular truncated cone of the outlet sealing device is aligned with the upper support of the safety valve checking platform.
Claims (8)
1. The utility model provides a heavy-calibre stop valve leakproofness test device which characterized in that: comprises an inlet sealing device and an outlet sealing device;
the outlet sealing device consists of a reinforcing ring (1), a conical seal (2) and an O-shaped ring;
the vertical height of the conical groove of the conical seal (2) is higher than that of the cut-off valve groove, so that the cut-off valve groove can be completely arranged in the conical seal (2);
the conical opening surface of the conical seal (2) is in contact fit with the starting position of the cut-off valve groove;
an annular groove is processed on the conical top surface of the conical seal (2), and an O-shaped ring is arranged in the annular groove;
a convex circular truncated cone is processed at the center of the conical top surface of the conical seal (2);
the reinforcing ring (1) is sleeved outside the conical seal (2);
the inlet sealing device and the outlet sealing device are different only in the conical sealing structure; a through hole is formed in the middle of the conical sealing convex circular truncated cone of the inlet sealing device and used for checking that a medium enters the stop valve;
the outlet sealing device is arranged above the inlet sealing device, and the stop valve is arranged between the outlet sealing device and the inlet sealing device.
2. The large-caliber stop valve tightness test device according to claim 1, wherein: the taper of the tapered seal (2) is 2-5 degrees smaller than that of the groove of the stop valve.
3. The large-caliber stop valve tightness test device according to claim 1, wherein: the heights of both ends of the reinforcing ring (1) are lower than those of both ends of the conical seal (2) so as to prevent the conical seal (2) from being broken under the action of clamping force.
4. The large-caliber stop valve tightness test device according to claim 1, wherein: the reinforcing ring (1) is in interference fit with the conical seal (2).
5. The large-caliber stop valve tightness test device according to claim 1, wherein: two concentric annular grooves are processed on the conical top surface of the conical seal (2), and an O-shaped ring I (3) and an O-shaped ring II (4) are respectively arranged in the two annular grooves.
6. The large-caliber stop valve tightness test device according to claim 1, wherein: the conical seal (2) is made of nylon.
7. The large-caliber stop valve tightness test device according to claim 1, wherein: the reinforcing ring (1) is made of stainless steel.
8. The large-caliber stop valve tightness test device according to any one of claims 1 to 7, wherein: the raised circular truncated cone of the inlet sealing device is arranged at an air inlet of the safety valve checking platform, a groove at the inlet of the stop valve is aligned with a tapered sealing groove of the inlet sealing device, a tapered sealing groove of the outlet sealing device is aligned with a groove at the outlet of the stop valve, and the raised circular truncated cone of the outlet sealing device is aligned with an upper support of the safety valve checking platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022597691.1U CN213748912U (en) | 2020-11-11 | 2020-11-11 | Large-diameter stop valve sealing performance test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022597691.1U CN213748912U (en) | 2020-11-11 | 2020-11-11 | Large-diameter stop valve sealing performance test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213748912U true CN213748912U (en) | 2021-07-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022597691.1U Active CN213748912U (en) | 2020-11-11 | 2020-11-11 | Large-diameter stop valve sealing performance test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213748912U (en) |
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2020
- 2020-11-11 CN CN202022597691.1U patent/CN213748912U/en active Active
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