CN202065512U - Spring-type safety valve for pressure stabilizer - Google Patents
Spring-type safety valve for pressure stabilizer Download PDFInfo
- Publication number
- CN202065512U CN202065512U CN2011201771338U CN201120177133U CN202065512U CN 202065512 U CN202065512 U CN 202065512U CN 2011201771338 U CN2011201771338 U CN 2011201771338U CN 201120177133 U CN201120177133 U CN 201120177133U CN 202065512 U CN202065512 U CN 202065512U
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- Prior art keywords
- valve
- guide sleeve
- spring
- pressure
- clack
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- 239000003381 stabilizer Substances 0.000 title claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 6
- 239000000428 dust Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 2
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 230000013011 mating Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a spring-type safety valve for a pressure stabilizer. The spring-type safety valve for the pressure stabilizer comprises a valve body, a valve base arranged in a pressure inlet of the valve body, a valve cover connected at the upper end of the valve body, a valve clack arranged in the flow passage of the valve body, a valve rod connected at the upper end of the valve clack, and a regulating screw rod fixed at the upper end of the valve cover and sleeved on the valve rod in a sliding way, wherein a set of pressure-regulating spring on the valve rod is arranged in the inner cavity of the valve cover; the valve clack is connected with the valve rod through a valve clack base combined component; the valve clack base combined component comprises a valve clack base, a guide sleeve, a corrugated pipe, a piston guide sleeve and a piston; the lower end of the valve clack base is connected with the upper end of the valve clack; the guide sleeve is sleeved on the outer wall of the valve clack base in a sliding way and is fixed on the valve body; the corrugated pipe is arranged in the inner cavity of the guide sleeve and connected at the upper end of the valve clack base; the piston guide sleeve is fixed between the lower end of the valve cover and the upper end of the guide sleeve; and the piston is sleeved on the valve rod and arranged in the inner cavity of the piston guide sleeve and is in sliding sealed contact with the wall of the inner cavity of the piston guide sleeve.
Description
Technical Field
The utility model relates to a valve, concretely relates to spring stabiliser relief valve.
Background
The safety valve of the voltage stabilizer is a very key overpressure protection device of a reactor coolant system of a nuclear power plant (a nuclear power plant, a nuclear submarine and the like), and is also a last overpressure protection barrier of the reactor coolant system. When the safety valve is installed on a voltage stabilizer, the opening pressure (setting pressure) needs to be adjusted to a very accurate value, and the deviation value is only +/-1%. The reactor coolant system is at a normal operating pressure lower than the cracking pressure of the pressurizer safety valve. When the system is abnormally operated, the pressure of the reactor coolant rises and reaches the opening pressure of the safety valve, the safety valve must be immediately opened, and therefore the pressure relief function is completed. When the system is depressurized to a specified pressure, the safety valve must be closed immediately, so that the system can recover to normal operation. The whole action process of the safety valve automatically completes the function of the safety valve while receiving the pressure signal of the system.
At present, all safety valves of spring type voltage stabilizers depend on inlets.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, provide a spring stabiliser relief valve, it can improve the fail safe nature of relief valve.
The technical scheme for realizing the purpose is as follows: a spring type pressure stabilizer safety valve comprises a valve body with a pressure inlet and a pressure outlet, a valve seat arranged in the pressure inlet of the valve body, a valve cover connected with the upper end of the valve body, a valve clack arranged in a flow passage of the valve body, a valve rod connected with the upper end of the valve clack and provided with a first-stage step surface on the outer wall, and an adjusting screw rod fixed at the upper end of the valve cover and sleeved on the valve rod in a sliding manner, wherein a pressure adjusting spring sleeved on the valve rod is arranged in an inner cavity of,
the valve clack is connected with the valve rod through a valve clack seat assembly, and the valve clack seat assembly comprises a valve clack seat, a guide sleeve, a corrugated pipe, a piston guide sleeve and a piston;
the lower end of the valve clack seat is connected with the upper end of the valve clack;
the guide sleeve is slidably sleeved on the outer wall of the valve flap seat and fixed on the valve body;
the corrugated pipe is arranged in the inner cavity of the guide sleeve and connected to the upper end of the valve flap seat;
the piston guide sleeve is fixed between the lower end of the valve cover and the upper end of the guide sleeve;
the piston is sleeved on the valve rod and arranged in the inner cavity of the piston guide sleeve, and the outer wall of the piston is sleeved with the sealing ring, so that the outer wall of the sealing ring can movably contact with the inner cavity wall of the piston guide sleeve in a sealing manner.
The spring type pressure stabilizer safety valve is characterized in that two pressure outlets are arranged on the valve body in a bilaterally symmetrical mode; the pressure inlet is arranged between the two pressure outlets and is vertical to the two pressure outlets.
In the spring type pressure stabilizer safety valve, two ends of the pressure regulating spring are respectively arranged in the inner cavity of the valve cover through the upper spring seat and the lower spring seat, the upper end surface of the upper spring seat is abutted against the lower end surface of the adjusting screw rod, and the lower end surface of the lower spring seat is abutted against the step surface of the valve rod.
In the spring type safety valve for the voltage stabilizer, the valve clack seat assembly further comprises a cushion block arranged in a groove in the upper end face of the valve clack seat, so that the valve rod is connected with the valve clack through the cushion block.
In the spring type safety valve for the voltage stabilizer, an upper adjusting ring is sleeved on the outer wall of the lower part of the guide sleeve; and a lower adjusting ring is sleeved on the outer wall of the upper part of the valve seat.
In the spring type safety valve for the voltage stabilizer, the upper end of the valve cover is sequentially connected with a protective cover and a dust cover, and a microswitch connected with the valve rod is arranged in the protective cover.
In the spring type safety valve for the voltage stabilizer, the lower end of the valve body is further connected with an inlet mating flange, and the safety valve is connected with the voltage stabilizer through the inlet mating flange.
The technical scheme of the spring type voltage stabilizer safety valve of the utility model adopts the corrugated pipe valve clack seat assembly, namely the valve clack is connected with the valve rod through the valve clack seat assembly, and the influence of valve back pressure on the opening pressure can be eliminated through the action of the corrugated pipe, and the medium can be prevented from leaking outside, thereby improving the safety and reliability of the voltage stabilizer safety valve; in addition, the valve body adopts a structure of single steam inlet and double steam exhaust, so that the influence of the reaction force of the steam exhaust can be balanced, and the dynamic load of the safety valve is reduced.
Drawings
Fig. 1 is the structure schematic diagram of the spring type voltage stabilizer safety valve of the utility model.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific embodiments with reference to the accompanying drawings:
referring to fig. 1, the spring type safety valve for voltage stabilizer of the present invention comprises a valve body 1 having a pressure inlet and a pressure outlet, a valve seat 3 installed in the pressure inlet of the valve body 1, a valve cover 20 connected to the upper end of the valve body 1, a valve clack 8 installed in the flow passage of the valve body 1, a valve rod 19 connected to the upper end of the valve clack 8 and having a step surface on the outer wall thereof, and an adjusting screw 21 fixed to the upper end of the valve cover 20 by a locking nut 22 and sliding on the valve rod 19. Wherein,
the upper end of the valve cover 20 is also connected with a protective cover 23 and a dust cover 24 in sequence, and a microswitch 25 connected with the valve rod 19 is arranged in the protective cover 23.
A pressure regulating spring 18 sleeved on the valve rod 19 is arranged in the inner cavity of the valve cover 20, two ends of the pressure regulating spring 18 are respectively arranged in the inner cavity of the valve cover 20 through an upper spring seat 17 and a lower spring seat 16, the upper end surface of the upper spring seat 17 abuts against the lower end surface of the adjusting screw rod 21, and the lower end surface of the lower spring seat 16 abuts against the step surface of the valve rod 19;
two pressure outlets on the valve body 1 are arranged symmetrically left and right; a pressure inlet on the valve body 1 is arranged between the two pressure outlets and is vertical to the two pressure outlets;
a lower adjusting ring 4 is sleeved on the outer wall of the upper part of the valve seat 3, and a layer of hard alloy is welded on the upper end face of the valve seat 3 in a stacking mode and used for preventing the bottom face of the valve clack 8 from being abraded when the hard alloy is contacted with the bottom face of the valve clack 8;
the valve flap 8 is connected to the valve rod 19 by a valve flap seat assembly comprising a valve flap seat 10, a guide sleeve 11, a bellows 12, a piston guide sleeve 13, a piston 14 and a cushion block 15, wherein,
the lower end of the valve clack seat 10 is clamped with the upper end of the valve clack 8;
the guide sleeve 11 is slidably sleeved on the outer wall of the valve flap seat 10 and fixed on the valve body 1; a layer of hard alloy is overlaid on the inner wall of the guide sleeve 11 to prevent the valve clack seat 10 from being easily abraded due to moving contact between the same metal materials;
the corrugated pipe 12 is arranged in the inner cavity of the guide sleeve 12 and connected with the upper end of the valve flap seat 10;
the piston guide sleeve 13 is fixed between the lower end of the valve cover 20 and the upper end of the guide sleeve 11;
the piston 14 is sleeved on the valve rod 19 and arranged in the inner cavity of the piston guide sleeve 13, and a sealing ring is sleeved on the outer wall of the piston 14, so that when the piston 14 moves up and down along with the valve rod 19, the outer wall of the sealing ring can be movably in sealing contact with the inner cavity wall of the piston guide sleeve 13;
the cushion block 15 is arranged in a clamping groove on the upper end surface of the valve clack seat 10, so that the valve rod 19 is clamped with the valve clack 8 through the cushion block 15; hard alloy is also deposited on the lower end of the valve rod 19 in a surfacing mode so as to prevent the valve rod 19 from impacting and damaging the cushion block when the valve is closed;
an upper adjusting ring 9 is sleeved on the outer wall of the lower part of the guide sleeve 11;
the lower end of the valve body 1 is also connected with an inlet mating flange 2, and the safety valve is connected with the pressure stabilizer through the inlet mating flange 2.
The utility model discloses a working principle of spring stabiliser relief valve is:
after the inlet companion flange 2 is welded with the pressure stabilizer, pressurized fluid in the pressure stabilizer acts below the valve clack 8 through the inlet companion flange 2 and a flow channel in the valve seat 3, so that the valve clack 8 is pushed upwards, the medium acting force below the valve clack 8 is smaller than the pretightening force of the pressure regulating spring 18 when the system operates normally, and the valve is in a closed sealing state. When the medium pressure under the valve clack 8 is increased to be balanced with the acting force of the pressure regulating spring 18, the pressure is continuously increased, the valve is automatically opened, fluid enters the valve body 1 through the valve seat 3 and is discharged through the two pressure outlets on the valve body 1, the pressure in the pressure stabilizer is reduced at the moment, and the valve is closed again when the pressure is reduced to a certain specified pressure.
The bellows 12 in the valve clack seat subassembly plays the balanced back pressure when valve clack 8 receives ascending thrust and prevents the external leakage function, is one of the structural feature of the stabiliser relief valve of the utility model. In addition, the valve body 1 is designed to be a symmetrical double-steam-exhaust port, so that the reaction force of steam exhaust can be balanced, and the dynamic load of the safety valve can be reduced.
It will be appreciated by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as limitations of the present invention, and that changes and modifications to the above described embodiments will fall within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (7)
1. A spring type pressure stabilizer safety valve comprises a valve body with a pressure inlet and a pressure outlet, a valve seat arranged in the pressure inlet of the valve body, a valve cover connected with the upper end of the valve body, a valve clack arranged in a flow passage of the valve body, a valve rod connected with the upper end of the valve clack and provided with a first-stage step surface on the outer wall, and an adjusting screw rod fixed at the upper end of the valve cover and sleeved on the valve rod in a sliding manner, wherein a pressure adjusting spring sleeved on the valve rod is arranged in an inner cavity of the valve,
the valve clack is connected with the valve rod through a valve clack seat assembly, and the valve clack seat assembly comprises a valve clack seat, a guide sleeve, a corrugated pipe, a piston guide sleeve and a piston;
the lower end of the valve clack seat is connected with the upper end of the valve clack;
the guide sleeve is slidably sleeved on the outer wall of the valve flap seat and fixed on the valve body;
the corrugated pipe is arranged in the inner cavity of the guide sleeve and connected to the upper end of the valve flap seat;
the piston guide sleeve is fixed between the lower end of the valve cover and the upper end of the guide sleeve;
the piston is sleeved on the valve rod and arranged in the inner cavity of the piston guide sleeve, and the outer wall of the piston is sleeved with the sealing ring, so that the outer wall of the sealing ring can movably contact with the inner cavity wall of the piston guide sleeve in a sealing manner.
2. The spring regulator relief valve of claim 1, wherein the pressure outlets on the valve body are two and are arranged side-to-side symmetrically; the pressure inlet is arranged between the two pressure outlets and is vertical to the two pressure outlets.
3. The spring-loaded regulator relief valve of claim 1, wherein the pressure regulating spring is disposed at its two ends in the inner cavity of the bonnet via upper and lower spring seats, respectively, the upper end surface of the upper spring seat abutting against the lower end surface of the adjusting screw, and the lower end surface of the lower spring seat abutting against the step surface of the valve stem.
4. The spring regulator relief valve of claim 1, wherein the valve flap seat assembly further comprises a spacer disposed in a groove in an upper end surface of the valve flap seat such that the valve stem is coupled to the valve flap through the spacer.
5. The spring-loaded regulator relief valve of claim 1, wherein an upper adjustment ring is fitted over the lower outer wall of the guide sleeve; and a lower adjusting ring is sleeved on the outer wall of the upper part of the valve seat.
6. The spring-loaded regulator relief valve of claim 1, wherein the upper end of the bonnet is further connected in series with a protective cap and a dust cap, the protective cap having a microswitch therein that is connected to the valve stem.
7. The spring regulator safety valve of claim 1, wherein the lower end of the valve body is further coupled to an inlet companion flange through which the safety valve is coupled to the regulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201771338U CN202065512U (en) | 2011-05-30 | 2011-05-30 | Spring-type safety valve for pressure stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201771338U CN202065512U (en) | 2011-05-30 | 2011-05-30 | Spring-type safety valve for pressure stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202065512U true CN202065512U (en) | 2011-12-07 |
Family
ID=45059374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201771338U Expired - Lifetime CN202065512U (en) | 2011-05-30 | 2011-05-30 | Spring-type safety valve for pressure stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202065512U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207217A (en) * | 2011-05-30 | 2011-10-05 | 上海阀门厂有限公司 | Spring-type stabilizer safety valve |
| CN103542153A (en) * | 2013-10-30 | 2014-01-29 | 杭州春江阀门有限公司 | Overpressure prevention pressure-relief valve |
-
2011
- 2011-05-30 CN CN2011201771338U patent/CN202065512U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207217A (en) * | 2011-05-30 | 2011-10-05 | 上海阀门厂有限公司 | Spring-type stabilizer safety valve |
| CN103542153A (en) * | 2013-10-30 | 2014-01-29 | 杭州春江阀门有限公司 | Overpressure prevention pressure-relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201814 Shanghai public road, Jiading District, No. 111 Patentee after: Shanghai valve factory Limited by Share Ltd Address before: 201814 Shanghai public road, Jiading District, No. 111 Patentee before: Shanghai Valve Factory Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111207 |
|
| CX01 | Expiry of patent term |