CN202884074U - Non-active pressure balance system solving boiler effect of nuclear grade sluice valve - Google Patents
Non-active pressure balance system solving boiler effect of nuclear grade sluice valve Download PDFInfo
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- CN202884074U CN202884074U CN 201220462648 CN201220462648U CN202884074U CN 202884074 U CN202884074 U CN 202884074U CN 201220462648 CN201220462648 CN 201220462648 CN 201220462648 U CN201220462648 U CN 201220462648U CN 202884074 U CN202884074 U CN 202884074U
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- valve
- pipeline
- sluice valve
- boiler effect
- gate valve
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Abstract
The utility model relates to structural design of a sluice valve, in particular to a non-active pressure balance system solving a boiler effect of a nuclear grade sluice valve. The non-active pressure balance system solving the boiler effect of the nuclear grade sluice valve comprises a tee joint sub-pipeline system which is respectively communicated with a valve cavity of the sluice valve, an upstream pipeline of the sluice valve and a downstream pipeline of the sluice valve. A dissociating valve core is arranged in a T-shaped connecting pipe of the tee joint sub-pipeline system, moves under an action of differential pressure between the upstream pipeline and the downstream pipeline, and forms a sealing structure with the inner wall of the pipeline with low pressure. Pipelines on two sides of the T-shaped connecting pipe of the tee joint sub-pipeline system are respectively provided with a manual operation isolating valve. The non- active pressure balance system solving the boiler effect of the nuclear grade sluice valve completely solves the problem of the boiler effect of the sluice valve, meanwhile does not damage a flashboard structure of the sluice valve, and guarantees service life of the valve.
Description
Technical field
The utility model relates to the structural design of gate valve, is specifically related to a kind of non-active pressure balancing system that solves the Boiler effect of nuclear level gate valve.
Background technique
The problem such as the Boiler effect of gate valve can cause the valve pocket superpressure, can't normally open.So-called Boiler effect, namely thermal source can heat the medium in the gate valve upper valve cavity space that is in closed condition, and valve pocket pressure is raise.This abnormal pressure may be so that two flashboards abut against on the valve seat simultaneously; When gate valve was opened, its electric actuator must overcome frictional force and the valve pocket pressure of flashboard and valve seat simultaneously.But, in the unlatching moment design of gate valve, do not consider the pressure of valve pocket, final result will make gate valve can't move when needs are opened.If the gate valve that safety is relevant can't normally be opened after accident, will be catastrophic consequence to the safety of nuclear power plant.
In severe case, Boiler effect may make the valve pocket internal pressure exceed the design pressure of gate valve, destroys the distortion of valve body internal structure and causes gate valve can't guarantee sealing.Need to guarantee the valve that seals for those after accident, this impact will make it can't limit radioactive release after accident, and then environment is impacted.
As shown in Figure 1, present mainstream solution is towards a side (A side) boring 2 of high pressure, so, then to have formed the open circuit of valve pocket 3 to gate valve high pressure side pipeline on the flashboard of gate valve 1.When the valve pocket of gate valve owing to affected by Boiler effect to boost since valve pocket with high pressure side UNICOM, therefore the pressure that Boiler effect produces will be relaxed the high pressure side to gate valve.And because the sealing surface of low voltage side (B side) is affected by both sides pressure reduction still, keep being close to low voltage side, therefore the sealing of valve is unaffected.Yet present solution can only be processed the comparatively single Boiler effect of valve operating mode of living in.And changing (the Part load upstream pressure is high, and the Part load downstream pressure is high) according to operating mode for the high and low pressure lateral root of gate valve, present this scheme can't solve problems.In addition, hole at flashboard, can cause that stress is concentrated, and then affect the working life of valve.
The model utility content
The purpose of this utility model is the defective for prior art, provides a kind of and can adapt to various operating modes, thoroughly solves the non-active pressure balancing system of nuclear power station center level gate valve Boiler effect.
The technical solution of the utility model is as follows: a kind of non-active pressure balancing system that solves the Boiler effect of nuclear level gate valve, comprise the threeway sub-pipes system that a cover is communicated with valve pocket, upstream line and the downstream line of gate valve respectively, be provided with free spool in the T-shaped adapter of described threeway sub-pipes system, free spool is mobile under the differential pressure action of upstream and downstream pipeline, and a side pipe road inwall formation sealing configuration low with pressure.
Further, the non-active pressure balancing system of the Boiler effect of aforesaid solution nuclear level gate valve, wherein, the pipeline in the T-shaped adapter both sides of described threeway sub-pipes system is respectively equipped with manual separating valve.
The beneficial effects of the utility model are as follows: the utility model is by the setting of the threeway sub-pipes system of connection valve pocket, upstream line and downstream line, the pressure of gate valve valve pocket is unloaded the high pressure side that is depressed into pipeline, realize the low voltage side sealing by free spool, prevent from gate valve is caused bypass.The utility model has thoroughly solved the Boiler effect problem of gate valve, can the flashboard structure of gate valve not damaged simultaneously, has guaranteed the working life of valve.
Description of drawings
Fig. 1 is the technological scheme schematic diagram that solves the gate valve Boiler effect in the prior art;
Fig. 2 is system architecture schematic diagram of the present utility model.
Embodiment
The non-active pressure balancing system of the Boiler effect of solution nuclear level gate valve provided by the utility model, comprise the threeway sub-pipes system that a cover is communicated with valve pocket, upstream line and the downstream line of gate valve respectively, be provided with free spool in the T-shaped adapter of described threeway sub-pipes system, free spool is mobile under the differential pressure action of upstream and downstream pipeline, and a side pipe road inwall formation sealing configuration low with pressure.Pipeline in the T-shaped adapter both sides of described threeway sub-pipes system is respectively equipped with manual separating valve.Manually separating valve generally is held open state, only just closes when carrying out the seal tightness test of valve.
Below in conjunction with drawings and Examples the utility model is described in detail.
As shown in Figure 2, the non-active pressure balancing system of this nuclear level gate valve, with the stainless steel pipeline valve pocket 3 and upstream line 4 are connected with downstream line and are connected, the Stainless Steel Tube line forms a kind of threeway sub-pipes system, the centre is T-shaped adapter 6, the both sides pipeline of T-shaped adapter 6 is communicated with respectively upstream line 4 and downstream line 5, and intermediate line connects the valve pocket 3 of gate valve.Be separately installed with manual separating valve 8,9 at the both sides of T-shaped adapter 6 pipeline, form a cover bidirectional non-return valve group.
Be provided with spool 7 in the inside of T-shaped adapter 6, described spool 7 is free state, with periphery without linkage structure.Spool 7 moves according to valve pocket 3 and upstream and downstream pipeline 4,5 pressure reduction.If the pressure of upstream line 4 is high, then spool 7 moves to downstream line 5 directions, and the pipeline inner wall with downstream line 5 forms sealing configuration simultaneously, and the pressure reduction of upstream and downstream is larger, and sealing is better, and vice versa.Like this then can guarantee that the pressure of valve pocket 3 unloads the high pressure side that is depressed into gate valve all the time.Manually separating valve 8,9 generally is held open state, only uses when testing and keep in repair.
This spool 7 should be selected the lower materials such as stainless steel of hardness, is conducive to form sealing surface and bears the valve operating pressure.Its shape needs not to be the shape of rule, can be polygonal, and I shape, or even two side-prominent dumbbell shapes should be determined according to concrete flow channel shape, sealing surface cross section etc.
The utility model is by the design of above-mentioned parts, and the high pressure that both can effectively gate valve have been produced owing to Boiler effect unloads the high pressure side to connecting tube, can not cause bypass to gate valve again simultaneously.With respect to prior art, the utility model can not damage the flashboard of gate valve itself, has guaranteed the working life of valve and the security of operation of power plant.
Obviously, those skilled in the art can carry out various changes and modification to the utility model and not break away from spirit and scope of the present utility model.Like this, if of the present utility model these are revised and modification belongs within the scope of the utility model claim and equivalent technology thereof, then the utility model also is intended to comprise these changes and modification interior.
Claims (2)
1. non-active pressure balancing system that solves the Boiler effect of nuclear level gate valve, it is characterized in that: comprise the threeway sub-pipes system that a cover is communicated with valve pocket (3), upstream line (4) and the downstream line (5) of gate valve (1) respectively, be provided with free spool (7) in the T-shaped adapter (6) of described threeway sub-pipes system, free spool (7) is mobile under the differential pressure action of upstream and downstream pipeline, and a side pipe road inwall formation sealing configuration low with pressure.
2. the non-active pressure balancing system of the Boiler effect of solution as claimed in claim 1 nuclear level gate valve is characterized in that: the pipeline in T-shaped adapter (6) both sides of described threeway sub-pipes system is respectively equipped with manual separating valve (8,9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462648 CN202884074U (en) | 2012-09-11 | 2012-09-11 | Non-active pressure balance system solving boiler effect of nuclear grade sluice valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220462648 CN202884074U (en) | 2012-09-11 | 2012-09-11 | Non-active pressure balance system solving boiler effect of nuclear grade sluice valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202884074U true CN202884074U (en) | 2013-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220462648 Expired - Fee Related CN202884074U (en) | 2012-09-11 | 2012-09-11 | Non-active pressure balance system solving boiler effect of nuclear grade sluice valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202884074U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853096A (en) * | 2012-09-11 | 2013-01-02 | 中国核电工程有限公司 | Passive pressure balance system for solving boiler effect of core-grade sluice valve |
| CN111895173A (en) * | 2020-08-06 | 2020-11-06 | 武芳 | Gate valve |
| CN112963558A (en) * | 2021-03-26 | 2021-06-15 | 马鞍山钢铁股份有限公司 | Method for reducing double-gate valve faults of high-pressure steam-water system |
-
2012
- 2012-09-11 CN CN 201220462648 patent/CN202884074U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102853096A (en) * | 2012-09-11 | 2013-01-02 | 中国核电工程有限公司 | Passive pressure balance system for solving boiler effect of core-grade sluice valve |
| CN111895173A (en) * | 2020-08-06 | 2020-11-06 | 武芳 | Gate valve |
| CN112963558A (en) * | 2021-03-26 | 2021-06-15 | 马鞍山钢铁股份有限公司 | Method for reducing double-gate valve faults of high-pressure steam-water system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| 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: 20130417 Termination date: 20200911 |