CN208816761U - A kind of pressure vessel pressure relief device of step self-opening type - Google Patents
A kind of pressure vessel pressure relief device of step self-opening type Download PDFInfo
- Publication number
- CN208816761U CN208816761U CN201821520062.5U CN201821520062U CN208816761U CN 208816761 U CN208816761 U CN 208816761U CN 201821520062 U CN201821520062 U CN 201821520062U CN 208816761 U CN208816761 U CN 208816761U
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- China
- Prior art keywords
- relief valve
- pressure
- pressure vessel
- capacity
- opening type
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- 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
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- Safety Valves (AREA)
- Pressure Vessels And Lids Thereof (AREA)
Abstract
The utility model discloses a kind of pressure vessel pressure relief devices of step self-opening type, it is characterised in that: is provided with steam supplying device and steam plant on pressure vessel, safety relief valve is provided between steam supplying device and steam plant；Safety relief valve includes low capacity safety relief valve and capacity safe relief valve, low capacity safety relief valve and capacity safe relief valve use the complete opening type safety relief valve of spring direct action type, set gradually low capacity safety relief valve and capacity safe relief valve along the direction that fluid in pressure vessel flows.The low capacity safety relief valve and capacity safe relief valve that the utility model passes through the different discharge amounts of setting, it ensure that superpressure is not run pressure vessel, reduce the number of starts of capacity safe relief valve, capacity safe relief valve chatter is avoided to damage sealing surface, the security reliability for improving pressure vessel operation, reduces the use cost of pressure relief device.
Description
Technical field
The utility model relates to a kind of pressure vessel pressure release fields, and in particular to a kind of pressure vessel of step self-opening type is let out
Pressure device.
Background technique
Safety relief valve is a kind of automatic valve, which is not arranged by external force using the power of medium itself
A certain number of fluids out are more than scheduled safe pressure numerical value to prevent locking system internal pressure, i.e. safety relief valve is to avoid
Cause the safety component of the great serious accident of equipment.For in thermal power plant auxiliary steam header, oxygen-eliminating device, heater with
And the pressure vessels such as temperature-decreased pressure reducer, maximum pressure release operating condition type selecting, safety relief valve used are pressed when safety relief valve is arranged
Bore is larger, and discharge amount is excessive, and to easily lead to the decline of pressure vessel local pressure too fast, and there are one for the decline of the pressure of whole system
There is chatter phenomenon in fixed lag, safety relief valve, and valve chatter can make safety relief valve sealing surface accelerated ageing, substantially reduce
Safety relief valve bulk life time causes to leak, while also will cause system pipeline vibration, and considerable safety thing can be caused when serious
Therefore.
Most of pressure vessel within the scope of power plant at present, on auxiliary steam header, heat supply header and temperature-decreased pressure reducer
The safety relief valve of setting substantially presses the design maximum flow type selecting that force container is likely to occur, configures by a fortune one,
Use cost is caused to increase；And since safety relief valve specification is normalized, the through-flow energy for the safety relief valve often taken
Power be much larger than design discharge, power plant safety relief valve occur chatter and sealing surface damage happen occasionally.
Utility model content
It is unreasonable for above-mentioned pressure vessel safety relief valve type selecting, cause safety relief valve chatter, sealing surface aging from
And the problem of causing safety relief valve to leak, the utility model provide a kind of pressure vessel pressure relief device of step self-opening type.
The utility model uses the following technical solution.
A kind of pressure vessel pressure relief device of step self-opening type, including pressure vessel, safety relief valve, the pressure vessel
One end be provided with steam supplying device, the other end of pressure vessel is provided with steam plant, sets between steam supplying device and steam plant
It is equipped with safety relief valve；The safety relief valve includes low capacity safety relief valve and capacity safe relief valve, along pressure
The direction that fluid flows in container sets gradually low capacity safety relief valve and capacity safe relief valve.
Preferably, the discharge amount of the low capacity safety relief valve be set greater than 90% and pressure above container normally transport
The rate-of flow of row operating condition.
Preferably, the set-pressure value of the low capacity safety relief valve is set greater than equal to 0.97 times pressure vessel
Design pressure.
Preferably, the discharge amount of the capacity safe relief valve is set greater than Jie of pressure vessel accidental conditions
Mass flow amount.
Preferably, the set-pressure value of the capacity safe relief valve is set as no more than design of pressure vessels pressure
1.06 times.
Preferably, the low capacity safety relief valve and capacity safe relief valve are all made of the complete of spring direct action type
Opening type safety relief valve.
Preferably, the steam supplying device is set as a no less than steam supplying device.
Compared with prior art, the utility model has the following beneficial effects: the utility model is by being arranged different discharge amounts
Low capacity safety relief valve and capacity safe relief valve, low capacity safety relief valve and capacity safe relief valve use spring
The complete opening type safety relief valve of direct acting type does the specification type selecting of low capacity safety relief valve and capacity safe relief valve
It is certain to require, guarantee that superpressure is not run pressure vessel, reduces the number of starts of capacity safe relief valve, large capacity is avoided to pacify
Full relief valve chatter damages sealing surface, improves the security reliability of pressure vessel operation；Select low capacity safety relief valve and
The combining form of capacity safe relief valve reduces by a capacity safe relief valve, reduces the use cost of pressure relief device.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
In figure, 1 is low capacity safety relief valve, and 2 be capacity safe relief valve, and 3 be pressure vessel, and 4 be steam supplying device
A, 5 be steam supplying device B, and 6 be steam plant.
Specific embodiment
In conjunction with following accompanying drawings, the technical solution of the utility model is described in further detail.
As shown in Figure 1, a kind of pressure vessel pressure relief device of step self-opening type, pressure vessel 3 is that power plant commonly assists
The equipment such as steam header, oxygen-eliminating device, heat supply header and temperature-decreased pressure reducer；One end of pressure vessel 3 is provided with steam supplying device A4
It is that pressure vessel 3 provides gas source with steam supplying device B5, steam supplying device A4 and steam supplying device B5；The other end of pressure vessel 3 is arranged
There is steam plant 6, low capacity safety relief valve 1 and capacity safe pressure release are provided between steam supplying device B5 and steam plant 6
Valve 2, low capacity safety relief valve 1 and capacity safe relief valve 2 are all made of the complete opening type safety relief of spring direct action type
Valve sets gradually low capacity safety relief valve 1 and capacity safe relief valve 2 along the direction that fluid in pressure vessel 3 flows.
The discharge amount of low capacity safety relief valve 1 is set greater than Jie of 90% and 3 accidental conditions of pressure above container
Mass flow amount, the set-pressure value of low capacity safety relief valve 1 are set greater than the design pressure equal to 0.97 times of pressure vessel 3
Power.
The discharge amount of capacity safe relief valve 2 is set greater than the rate-of flow of 3 accidental conditions of pressure vessel, greatly
The set-pressure value of capacity relief relief valve 2 is set as 1.06 times of the design pressure no more than pressure vessel 3.
The working principle of the utility model are as follows: since ± 3% set-pressure is not to be exceeded in safety relief valve set-pressure deviation
Or the larger value of ± 0.015MPa, consider that this part deviation, the set-pressure value of low capacity safety relief valve 1 are greater than 0.97
The design pressure of times pressure vessel 3 and the design pressure for being less than pressure vessel 3.
When 3 superpressure of pressure vessel, with higher sensitivity low capacity safety relief valve 1 is first opened, and is carried out to pressure vessel 3
Pressure release, if pressure drops to the set-pressure of low capacity safety relief valve 1 or less in pressure vessel 3, low capacity safety relief valve 1
It closes, is accidental conditions in pressure vessel 3.
If pressure continues to increase in pressure vessel 3, capacity safe relief valve 2 is opened, and is continued to 3 pressure release of pressure vessel,
When below the set-pressure that the pressure in pressure vessel 3 drops to capacity safe relief valve 2, capacity safe relief valve 2
It closes, low capacity safety relief valve 1 continues to 3 pressure release of pressure vessel at this time, until the pressure in pressure vessel 3 drops to low capacity
When below the set-pressure of safety relief valve 1, low capacity safety relief valve 1 is closed.
The number of starts for reducing capacity safe relief valve 2 during this avoids capacity safe relief valve 2 from frequently rising
It jumps, guarantees the sealing performance of 2 sealing surface of capacity safe relief valve.
Low capacity safety relief valve 1 and capacity safe relief valve 2 are all made of the complete opening type safety relief of spring direct-type
Valve, during the entire process of 3 pressure release of pressure vessel, the action process of low capacity safety relief valve 1 and capacity safe relief valve 2
It is mechanical action, is not necessarily to manual operation, pressure vessel 3 can realizes step self-opening type decompression function.
Other technologies are referring to the prior art.
The above is only preferred embodiments of the present invention, is not the limit to technical solutions of the utility model
It is fixed, it is noted that those skilled in the art, under the premise of being or else detached from technical solutions of the utility model, can also make into
The improvement and change of one step, these improve and change, should all cover in the protection scope of this field.
Claims (7)
1. a kind of pressure vessel pressure relief device of step self-opening type, including pressure vessel (3), safety relief valve, it is characterised in that:
One end of the pressure vessel (3) is provided with steam supplying device, and the other end of pressure vessel (3) is provided with steam plant (6), steam supply
Safety relief valve is provided between device and steam plant (6)；The safety relief valve include low capacity safety relief valve (1) and
Capacity safe relief valve (2) sets gradually low capacity safety relief valve along the direction of the interior fluid flowing of pressure vessel (3)
(1) and capacity safe relief valve (2).
2. the pressure vessel pressure relief device of step self-opening type according to claim 1, it is characterised in that: the low capacity peace
The discharge amount of full relief valve (1) is set greater than the rate-of flow of 90% and pressure above container (3) accidental conditions.
3. the pressure vessel pressure relief device of step self-opening type according to claim 2, it is characterised in that: the low capacity peace
The set-pressure value of full relief valve (1) is set greater than the design pressure of equal to 0.97 times pressure vessel (3).
4. the pressure vessel pressure relief device of step self-opening type according to claim 3, it is characterised in that: the large capacity peace
The discharge amount of full relief valve (2) is set greater than the rate-of flow of pressure vessel (3) accidental conditions.
5. the pressure vessel pressure relief device of step self-opening type according to claim 4, it is characterised in that: the large capacity peace
The set-pressure value of full relief valve (2) is set as 1.06 times of the design pressure no more than pressure vessel (3).
6. the pressure vessel pressure relief device of step self-opening type according to claim 1, it is characterised in that: the low capacity peace
Full relief valve (1) and capacity safe relief valve (2) are all made of the complete opening type safety relief valve of spring direct action type.
7. the pressure vessel pressure relief device of step self-opening type according to claim 1, it is characterised in that: the steam supplying device
It is set as a no less than steam supplying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821520062.5U CN208816761U (en) | 2018-09-18 | 2018-09-18 | A kind of pressure vessel pressure relief device of step self-opening type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821520062.5U CN208816761U (en) | 2018-09-18 | 2018-09-18 | A kind of pressure vessel pressure relief device of step self-opening type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208816761U true CN208816761U (en) | 2019-05-03 |
Family
ID=66277535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821520062.5U Expired - Fee Related CN208816761U (en) | 2018-09-18 | 2018-09-18 | A kind of pressure vessel pressure relief device of step self-opening type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208816761U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027347A (en) * | 2018-09-18 | 2018-12-18 | 中国电建集团河南省电力勘测设计院有限公司 | A kind of pressure vessel pressure relief device of step self-opening type |
-
2018
- 2018-09-18 CN CN201821520062.5U patent/CN208816761U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109027347A (en) * | 2018-09-18 | 2018-12-18 | 中国电建集团河南省电力勘测设计院有限公司 | A kind of pressure vessel pressure relief device of step self-opening type |
| CN109027347B (en) * | 2018-09-18 | 2024-05-28 | 中国电建集团河南省电力勘测设计院有限公司 | Pressure vessel pressure relief device with step self-opening |
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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: 20190503 |