CN215908470U - Backstop suitable for nuclear power station drainage - Google Patents
Backstop suitable for nuclear power station drainage Download PDFInfo
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- CN215908470U CN215908470U CN202122170162.8U CN202122170162U CN215908470U CN 215908470 U CN215908470 U CN 215908470U CN 202122170162 U CN202122170162 U CN 202122170162U CN 215908470 U CN215908470 U CN 215908470U
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- funnel
- valve body
- backstop
- cylinder
- connecting ring
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Abstract
The invention discloses a backstop suitable for nuclear power station drainage, which comprises a funnel, a first water inlet, a second water inlet and a first water outlet, wherein the funnel is arranged in the middle of the backstop; the bottom circle of the upper cylinder of the funnel is connected with the top circle of the lower cylinder of the funnel through a second connecting ring; a support plate is fixed on the upper surface of the second connecting ring, a valve body is fixed on the support plate, a valve rod penetrates through the valve body, and a spring is arranged around the valve rod; the bottom of the valve rod penetrates out of the valve body and is connected with the leakage receiver; the side wall of the leakage receiver surrounds the lower cylinder of the funnel, and a sealing ring is arranged at the top circle of the leakage receiver; the sealing ring is attached to the lower surface of the second connecting ring; the invention can effectively prevent sewer gas from rising into a room.
Description
Technical Field
The invention relates to a drainage system, in particular to a backstop suitable for drainage of a nuclear power station.
Background
When rooms in the nuclear power station are subjected to accidental leakage and need to be collected and removed, or process pipeline leakage and polluted fire-fighting water need to be drained and drained, not only the position needing to be drained but also the use environment of the nuclear power station need to be considered; the drainage device in the special working environment has better corrosion resistance, more reasonable strength and structure requirements and better drainage and drainage capacity.
The existing drainage device used in the nuclear power station meets the requirements, but the existing drainage device has a fatal defect: and is not sealed. After the water stored in the drainage device is evaporated, the waste gas in the pipeline connected with the drainage device rises to the interior of the nuclear power plant through the drainage device, and the waste gas harms human bodies. Therefore, a certain amount of water needs to be injected into the drainage device by workers regularly, but the number of the drainage devices in the nuclear power station is large, so that about one thousand drainage devices can be formed by one unit, the workload is huge, and the waste of manpower and material resources is caused. It is therefore important to design a backstop within the drainage device to prevent backflow of the exhaust gases.
Disclosure of Invention
The invention aims to solve the technical problem of providing a backstop suitable for nuclear power station drainage so as to solve the problems in the background art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a backstop suitable for nuclear power station drainage comprises a funnel, wherein the funnel comprises a larger funnel upper cylinder and a smaller funnel lower cylinder; the bottom circle of the upper cylinder of the funnel is connected with the top circle of the lower cylinder of the funnel through a horizontal second connecting ring; a supporting plate is horizontally fixed on the upper surface of the second connecting ring, a valve body is vertically fixed on the supporting plate, a valve rod vertically penetrates through the valve body in a sliding mode from bottom to top, and a spring storage cylinder is arranged in the valve body around the valve rod; a vertical spring surrounding the valve rod is arranged in the spring storage cylinder; the top of the valve rod is provided with a top spring seat, the bottom surface of the spring storage cylinder is provided with a bottom spring seat, and the spring is limited between the top spring seat and the bottom spring seat;
the bottom of the valve rod is connected with a leakage receiver after sliding out of the valve body; the leakage receiver comprises a base plate and a side wall vertically connected to the edge of the base plate, and the side wall surrounds the lower cylinder of the funnel; a sealing ring is arranged at the top circle of the side wall; the sealing ring is attached to the lower surface of the second connecting ring.
The top of the valve body is provided with a plug.
A third connecting ring extends outwards from the top circle of the cylinder on the funnel, and a bolt opening is formed in the third connecting ring.
A spherical cap is connected between the valve rod and the center of the chassis, and the diameter of the spherical cap is larger than that of the bottom opening of the valve body.
The metal materials of the shell part and the backstop part of the drainage device are all 06Cr18Ni11Ti and are subjected to solution treatment, and the corrosion resistance of the drainage device can be better exerted only because the stable austenitic stainless steel structure can be obtained only through the solution treatment.
The advantage of the invention over the prior art is that it can be used in nuclear power plants to collect and remove accidental leaks in the floor of a room, leaks in process piping and potentially contaminated fire-fighting water. The backstop of the invention is arranged in the drainage device, thus preventing the waste gas from flowing back. The invention has the advantages of high strength, large bearing pressure, high corrosion resistance, certain radiation resistance and good sealing property, greatly prolongs the service life of the drainage device and saves the cost. The circular design is also convenient to install in various models of drainage devices, and the sewage discharge area is increased. The invention has the advantages of rigorous structure, reasonable layout and convenient use, and simultaneously has the functions of corrosion resistance, deodorization, fire prevention and pressure resistance.
Drawings
FIG. 1 is a side cross-sectional view of a drainage device to which the backstop of the present invention is mounted;
FIG. 2 is a top view of a drainage device to which the backstop of the present invention is mounted;
FIG. 3 is a side cross-sectional view of a backstop according to the present invention;
fig. 4 is a top view of the support plate of the present invention.
In the figure, 1, an outer ring plate, 2, an inner ring plate, 3, a grating plate, 4, a graphite gasket, 5, a hexagon head bolt, 6, a backstop, 7, a main cylinder, 8, a drainage cylinder, 9, an annular connecting plate, 10 and a bracket;
61. funnel, 62, sealing washer, 63, leak receiver, 64, plug, 65, valve body, 66, backup pad, 67, spring, 68, spherical cap, 69, stop nut, 610, top spring seat, 611, valve rod.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 4, the non-return device for nuclear power plant water drainage of the present invention may be mounted on an external casing, and the external casing may be various, and only one example is given here.
The outer shell comprises a vertical main cylinder body 7, and the bottom of the main cylinder body 7 is communicated with a vertical drainage cylinder body 8 through a horizontal annular connecting plate 9; a first connecting ring extends outwards from the top circle of the main cylinder 7 horizontally, and a grating plate 3 is fixed on the first connecting ring through a fastener after being horizontally covered on the opening at the top of the drainage cylinder 8;
the backstop 6 fixed in the main cylinder 7 comprises a funnel 61, and the funnel 61 comprises a larger funnel upper cylinder and a smaller funnel lower cylinder; the bottom circle of the upper cylinder of the funnel is connected with the top circle of the lower cylinder of the funnel through a horizontal second connecting ring; a supporting plate 66 is horizontally fixed on the upper surface of the second connecting ring, a valve body 65 is vertically fixed on the supporting plate 66, a valve rod 611 vertically penetrates through the valve body 65 in a sliding mode from bottom to top, and a spring storage cylinder is arranged in the valve body 65 around the valve rod 611; a vertical spring 67 surrounding the valve rod 611 is arranged in the spring storage cylinder; the top of the valve rod 611 is provided with a top spring seat 610, the bottom surface of the spring storage cylinder is a bottom spring seat, and the spring 67 is limited between the top spring seat 610 and the bottom spring seat;
the bottom of the valve rod 611 is connected to a leak receiver 63 after sliding out of the valve body 65; the leak receiver 63 comprises a base plate and a side wall vertically connected to the edge of the base plate, wherein the side wall surrounds the lower cylinder of the funnel; a sealing ring 62 is arranged at the top circle of the side wall; the sealing ring 62 is attached to the lower surface of the second connecting ring.
The top of the valve body 65 is provided with a plug 64.
A third connecting ring extends outwards from the top circle of the cylinder on the funnel horizontally, and the third connecting ring is fixed on the upper surface of the first connecting ring through a fastener.
The third connection ring is disposed between the first connection ring and the grid plate 3.
A graphite gasket 4 is arranged between the third connecting ring and the first connecting ring.
A spherical cap 68 is connected between the valve stem 611 and the center of the chassis, and the diameter of the spherical cap 68 is larger than the diameter of the bottom opening of the valve body 65.
The outer wall of the main cylinder 7 is also connected with a bracket 10.
The invention can also be provided with an outer ring plate 1 and an inner ring plate 2 which play the roles of limiting and mounting. The graphite gasket 4 can also be a flexible graphite and metal composite gasket. The top view of the supporting plate 66 can be seen in fig. 4, and a circular hole is formed in the middle, and the valve body 65 is fixed at the position of the circular hole after passing through the circular hole. A limit nut 69 may also be threaded above top spring seat 610.
When the invention is used, a drainage device consisting of the backstop 6 and the outer shell is arranged at the inlet of the pipeline needing drainage. Under the condition that no water enters the backstop 6, the sealing ring 62 is tightly attached below the second connecting ring due to the elastic force of the spring 67, so that the smell of the sewer is prevented from entering the room from bottom to top. When water flows into the funnel 61 from top to bottom and further into the leak receiver 63, the spring 67 is compressed by the gravity of the water so that the sealing ring 62 is disengaged from the second connecting ring, and when the water level reaches a sufficient level, the water flows out from the gap between the sealing ring 62 and the second connecting ring to the drain cylinder 8 to be drained. When the water is drained, some water may remain in the leak receiver 63, and when the water is evaporated, the sealing ring 62 is attached to the second connection ring again to prevent the smell of the sewage from rising into the room. It may be provided that the sealing ring 62 is only separated from the second connecting ring when the water level in the leak receiver 63 reaches 1/5, which ensures a tight fit of the sealing ring 62 with the second connecting ring in the water-free state. It can be seen that the back stop 6 serves to primarily prevent the backflow of exhaust gas and that there are many options for the outer housing to which it is mounted.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (5)
1. The backstop suitable for nuclear power station drainage is characterized by comprising a funnel (61), wherein the funnel (61) comprises a larger funnel upper cylinder and a smaller funnel lower cylinder; the bottom circle of the upper cylinder of the funnel is connected with the top circle of the lower cylinder of the funnel through a horizontal second connecting ring; a supporting plate (66) is horizontally fixed on the upper surface of the second connecting ring, a valve body (65) is vertically fixed on the supporting plate (66), a valve rod (611) vertically slides through the valve body (65) from bottom to top, and a spring storage cylinder is arranged in the valve body (65) around the valve rod (611); a vertical spring (67) surrounding the valve rod (611) is arranged in the spring storage cylinder; a top spring seat (610) is arranged at the top of the valve rod (611), a bottom spring seat is arranged at the bottom surface of the spring storage cylinder, and the spring (67) is limited between the top spring seat (610) and the bottom spring seat;
the bottom of the valve rod (611) penetrates through the valve body (65) in a sliding mode and then is connected with a leakage receiver (63); the leakage receiver (63) comprises a bottom plate and a side wall vertically connected to the edge of the bottom plate, and the side wall surrounds the lower cylinder of the funnel; a sealing ring (62) is arranged at the top circle of the side wall; the sealing ring (62) is attached to the lower surface of the second connecting ring.
2. The backstop suitable for nuclear power plant water discharge according to claim 1, characterized in that the top of the valve body (65) is provided with a plug (64).
3. The backstop suitable for nuclear power station drainage according to claim 1, characterized in that a third connecting ring extends outwards horizontally from the top circle of the cylinder on the funnel.
4. The backstop suitable for nuclear power station drainage according to claim 3, characterized in that the third connecting ring is provided with a bolt port.
5. The non-return device for nuclear power plant water discharge according to claim 1, characterized in that a spherical cap (68) is connected between the valve stem (611) and the center of the chassis, the spherical cap (68) having a diameter greater than the diameter of the bottom opening of the valve body (65).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122170162.8U CN215908470U (en) | 2021-09-09 | 2021-09-09 | Backstop suitable for nuclear power station drainage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122170162.8U CN215908470U (en) | 2021-09-09 | 2021-09-09 | Backstop suitable for nuclear power station drainage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215908470U true CN215908470U (en) | 2022-02-25 |
Family
ID=80294425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122170162.8U Active CN215908470U (en) | 2021-09-09 | 2021-09-09 | Backstop suitable for nuclear power station drainage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215908470U (en) |
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2021
- 2021-09-09 CN CN202122170162.8U patent/CN215908470U/en active Active
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