CN2310906Y - Spring direct acting safety valve with external balance mechanism - Google Patents
Spring direct acting safety valve with external balance mechanism Download PDFInfo
- Publication number
- CN2310906Y CN2310906Y CN 97210687 CN97210687U CN2310906Y CN 2310906 Y CN2310906 Y CN 2310906Y CN 97210687 CN97210687 CN 97210687 CN 97210687 U CN97210687 U CN 97210687U CN 2310906 Y CN2310906 Y CN 2310906Y
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- spring
- relief valve
- valve
- operated relief
- cylinder body
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- Expired - Fee Related
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Abstract
The utility model relates to a spring direct acting safety valve with an external balance mechanism, which comprises common safety valve assembly 11 to 19 whose appearances are altered a little, a connecting sleeve 2, balance assembly 31 to 37, driving assembly 41 to 45, regulating assembly 51 to 54, discharge valve assembly 61 to 68, and throttling elements 71, 72. The utility model overcomes the disadvantage that a common spring direct acting safety valve causes the leakage of working medium because of insufficient sealing, can be reliably used in a pressure system or a nuclear steam supply system which uses toxic objects and inflammable objects as the working medium. Then, the utility model can be used for protecting a military pressure safety system, an industrial pressure safety system, a civil pressure safety system, etc.
Description
A kind of spring direct-operated relief valve that has external balanced controls that is used for the pressurized container overvoltage protection.
Existing spring direct-operated relief valve (being designated hereinafter simply as common safety valve) mostly is made up of spring, flap, valve seat and push rod, its working principle is: when working medium pressure in the system during greater than the impacting force of flap that is produced by spring and valve base chamber, working medium backs down flap and overflows from flap and valve base chamber, relieving pressure, thereby the safety of assurance pressurized container.It is simple in structure, and discharging is reliable, adopts for people for a long time.But its obvious deficiency is: before reaching discharge pressure, will inevitably successively decrease with the increase of pressure medium by spring force (being positive sealing force) and pressure medium (promptly negative sealing force) the formed sealing force of superposition, final less than the required minimum sealing force of safety valve (it depends on material, geometric accuracy and the quality of processing of sealing pair), thereby cause the improper leakage of working medium.The improper leakage of common safety valve is a universal phenomenon.
The purpose of this utility model is external cover balanced controls on the basis of common safety valve, so that outside positive sealing force one spring force, utilize additional positive sealing force of working medium pressure regeneration, and this additional positive sealing force is when working medium pressure reaches the safety valve discharge pressure, can disappear owing to the effect of balanced controls, thereby both increased the sealing force under the normal condition, suppress effectively to leak, do not change discharge pressure value again, more reliable when guaranteeing safety.
Main composition of the present utility model comprises common relief valve assembly 11～19, joint sleeve 2, balanced component 31～37, driven unit 41～45, adjusting part 51～54, bleed valve assembly 61～68 and the throttle element 71,72 that profile is changed a little.
Concrete formation of the present utility model is to link to each other with joint sleeve 2 with bolt pair 110 with flange by the rim of the mouth in the upper end of common safety valve valve body 11 with basic principle, and balance spring bottom race 31, balance spring 32, balance spring top race 34 are equipped with along axis in joint sleeve 2 inside.And the upper end of joint sleeve 2 is spirally connected with the lower end of compensating cylinder cylinder body 35 again.Bellows 36, balancing pole 33 are equipped with along axis in compensating cylinder cylinder body 35 inside.Balancing pole 33 passes joint sleeve 2 and leaves certain working clearance with flap push rod 15 upper ends in the safety valve valve body 11.There is the interface 37 of pipeline 10 compensating cylinder cylinder body 35 upper ends.Drive cylinder cylinder body 41 is fixed on the overhanging last auricle of joint sleeve 2, and bellows 42, driveshaft 43 are equipped with along axis in its inside; Drive cylinder cylinder body 41 tops respectively have a working medium ingress interface 44 and a working medium discharge coupling 45 that is connected with pipeline 10 with the side.Escape cock valve body 64 is fixed on the overhanging following auricle of joint sleeve 2, bellows 61, drain lever 62, escape cock valve seat 65, seal ring 66, escape cock end cap 67 are equipped with along axis in inside, have the interface 68 that links to each other with pipeline 10 on it, escape cock valve body 64 sides have the interface 63 that communicates with the pipeline 9 of releasing.Between the overhanging upper and lower auricle of joint sleeve 2 with drive cylinder cylinder body 41 and escape cock valve body 64 coaxial lines Regulation spring 52, Regulation spring top race 51, Regulation spring bottom race 53 and adjusting nut 54 be housed, driveshaft 43 passes Regulation spring 52 along axis, leaves certain working clearance with drain lever 62 upper ends.Rotation adjusting nut 54 can change the size of the driving force that driveshaft 43 moves up and down along axis, promptly changes the moment of the additional positive sealing load of external balanced controls removal.The pressure of working medium advances in people's drive cylinder cylinder body 41 by the interface 44 on throttle element 71, drive cylinder cylinder body 41 tops in the pressurized container, and act on driveshaft 43 and the bellows 42, last end interface 37 and the interface 68 on the escape cock end cap 67 by drive cylinder cylinder body 41 sidewall interfaces 45, throttle element 72, pipeline 10, compensating cylinder cylinder body 35 enters compensating cylinder the cylinder body 35 interior and escape cock end cap 67 interior lower ends that also act on balancing pole 33, bellows 36 and drain lever 62 respectively respectively simultaneously.Rotation adjusting nut 54 makes when the discharge pressure that working medium pressure in the system is determined less than common relief valve assembly 11-19, although driveshaft 43 moves and contacts to drain lever 62 directions vertically, also is not enough to push drain lever 62.On the other hand, select suitable bellows 36, the rigidity of balance spring 32 according to designing requirement, make when system pressure reaches a certain numerical value, pressure medium driven equilibrium bar 33 in the compensating cylinder cylinder body 35, and force flap push rod 15 flap 13 to be pressed against on the upper-end surface of flap seat 12, and then reach and utilize working medium to apply additional positive sealing force, effectively prevent the purpose of the improper leakage of medium.When working medium pressure in the system is equal to or greater than the safety valve discharge pressure, the working medium that enters in the drive cylinder cylinder body 41 through throttle element 71 and interface 44 forces driveshaft 43 to push drain lever 62, so the interfaces 63 of working medium on gap between interface 37, pipeline 10, interface 68, drain lever 62 and the escape cock valve seat 65 and escape cock valve body 64 sidewalls in the compensating cylinder cylinder body 35 enter towards the pipeline 9 of the container of releasing.Because the working medium in the compensating cylinder cylinder body 35 is released, pressure sharply descends, balancing pole 33 moves up at the effect lower edge axis of balance spring 32, bellows 36 restoring forces and leaves flap push rod 15, additional positive sealing force disappears immediately, safety valve flap 13 leaves flap seat 12 and opens under the pressure medium effect, by discharge pipe interface 19 pressure relief systems.When system pressure recovers normal, when promptly being lower than opening pressure of safety valve, the spring direct-operated relief valve with external balanced controls returns to aforementioned corresponding work state again.
Accompanying drawing has the spring direct-operated relief valve general structure sectional view of external balanced controls
Preferred embodiment of the utility model following (referring to accompanying drawing):
In the perforate of the upper end of common safety valve valve body 11, set up rim of the mouth and bead and also fuse with the following bead of bolt secondary 110 with joint sleeve 2; Along its axis balance spring bottom race 31, balance spring 32, balance spring top race 34 are housed in the joint sleeve 2, and the lower end of the upper end of joint sleeve 2 and compensating cylinder cylinder body 35 is spirally connected; Bellows 36, balancing pole 33 are equipped with along its axis in compensating cylinder cylinder body 35 inside.Balancing pole 33 passes joint sleeve 2 along its axis and leaves certain working clearance with flap push rod 15 upper ends in the safety valve valve body 11.There is the interface 37 of pipeline 10 compensating cylinder cylinder body 35 upper ends.Drive cylinder cylinder body 41 is screwed onto on the overhanging last auricle of joint sleeve 2; Bellows 42, driveshaft 43 are equipped with along its axis in drive cylinder cylinder body 41 inside; Drive cylinder cylinder body 41 tops have working medium ingress interface 44, and the side has the working medium discharge coupling 45 that is connected with pipeline 10.Escape cock valve body 64 is screwed onto on the overhanging following auricle of joint sleeve 2, and bellows 61, drain lever 62, escape cock valve seat 65, seal ring 66 and escape cock end cap 67 are equipped with along axis in its inside; Have the interface 68 that is connected with pipeline 10 on the escape cock end cap 67, the side of escape cock valve body 64 has the interface 63 that communicates with the pipeline 9 of releasing.Between the overhanging upper and lower auricle of joint sleeve 2 with drive cylinder cylinder body 41 and escape cock valve body 64 coaxial lines Regulation spring 52, Regulation spring top race 51, Regulation spring bottom race 53 and adjusting nut 54 driveshafts 43 be housed pass Regulation spring 52 along axis, be reserved with certain working clearance with drain lever 62 upper ends.Working medium end interface 44 on throttle element 71 and drive cylinder cylinder body 41 enters in the drive cylinder cylinder body 41 in the system, and the interface 68 on end interface 37, the escape cock end cap 67 enters respectively in compensating cylinder cylinder body 35 and the escape cock end cap 67 on the sidewall interface 45 of drive cylinder cylinder body 41, discharging throttle element 72 and pipeline 10, compensating cylinder cylinder body 35 again.The same with common safety valve, the flange of safety valve valve seat 12 links to each other with pressure vessel relief valve joint 8 by bolt pair 111.Safety valve flap 13 links to each other with the pipeline 9 of releasing by bolt pair 112 with body wall upper shed 19 between the valve seat 12.The above-mentioned spring direct-operated relief valve that has external balanced controls can increase sealing force effectively under the normal situation of system pressure, prevent that working medium from leaking, and can accurately discharge during system's overvoltage.Even external balanced controls accident is malfunctioning, it still can not have the same normal the playing a role of common safety valve of external balanced controls with other.
The utility model has overcome common spring direct-operated relief valve often because of sealing the shortcoming that deficiency causes refrigerant leakage, can work in more reliably with in poisonous, that fire good are the working medium pressure system or nuclear steam supply system.Thereby can be applicable to the protection of military affairs, industry, civilian equal pressure safety system.
Claims (7)
1. spring direct-operated relief valve that has external balanced controls, it comprises spring direct-operated relief valve valve body 11, and inside is equipped with valve seat 12, flap 13, flap push rod 15, spring lower seat circle 14, spring 16, spring top race 17, is adjusted nut 18 and discharge pipe interface 19 along its axis; The upper end that it is characterized in that spring direct-operated relief valve valve body 11 is opened wide and is fused by bead and the bolt secondary 110 following bead with joint sleeve 2; The lower end of the upper end of joint sleeve 2 and compensating cylinder cylinder body 35 is spirally connected; Drive cylinder cylinder body 41 is screwed onto on the overhanging last auricle of joint sleeve 2; Escape cock valve body 64 is screwed onto on the overhanging following auricle of joint sleeve 2, and adjusting nut 54, Regulation spring bottom race 53, Regulation spring 52, Regulation spring top race 51 are between the overhanging upper and lower auricle of joint sleeve 2.
2. the spring direct-operated relief valve that has external balanced controls as claimed in claim 1, it is characterized in that spring direct-operated relief valve valve body 11 upper ends open wide, the balancing pole 33 that is positioned at compensating cylinder cylinder body 35 and passes joint sleeve 2 inner chambers and flap push rod 15 are in this reservation working clearance.
3. the spring direct-operated relief valve that has external balanced controls as claimed in claim 1, it is characterized in that along its axis balance spring bottom race 31, balance spring 32, balance spring top race 34 being housed in the joint sleeve 2, balancing pole 33 passes said elements along its axis.
4. the spring direct-operated relief valve that has external balanced controls as claimed in claim 1 is characterized in that along its axis bellows 36, balancing pole 33 being housed in the compensating cylinder cylinder body 35, and there is the interface 37 of pipeline 10 compensating cylinder cylinder body 35 upper ends.
5. the spring direct-operated relief valve that has external balanced controls as claimed in claim 1 is characterized in that along its axis bellows 42, driveshaft 43 being housed in the drive cylinder cylinder body 41; A working medium ingress interface 44 and a working medium discharge coupling 45 are arranged on the drive cylinder cylinder body 41.
6. the spring direct-operated relief valve that has external balanced controls as claimed in claim 1 is characterized in that along its axis bellows 61, drain lever 62, escape cock valve seat 65, seal ring 66, escape cock end cap 67 being housed in the escape cock valve body 64; Reserve the working clearance between drain lever 62 upper ends and driveshaft 43 lower ends, escape cock valve body 64 sidewalls have towards releasing the interface 63 of container, the interface 68 that there is pipeline 10 escape cock end cap 67 centers.
7. the spring direct-operated relief valve that has external balanced controls as claimed in claim 1, it is characterized in that before the working medium ingress interface 44 of drive cylinder cylinder body 41 inlet restriction element 71 being housed, and discharging throttle element 72 is housed behind the working medium discharge coupling 45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97210687 CN2310906Y (en) | 1997-02-01 | 1997-02-01 | Spring direct acting safety valve with external balance mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97210687 CN2310906Y (en) | 1997-02-01 | 1997-02-01 | Spring direct acting safety valve with external balance mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2310906Y true CN2310906Y (en) | 1999-03-17 |
Family
ID=33929505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97210687 Expired - Fee Related CN2310906Y (en) | 1997-02-01 | 1997-02-01 | Spring direct acting safety valve with external balance mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2310906Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386547C (en) * | 2003-08-29 | 2008-05-07 | 赵文轩 | Safety valve for nuclear |
-
1997
- 1997-02-01 CN CN 97210687 patent/CN2310906Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100386547C (en) * | 2003-08-29 | 2008-05-07 | 赵文轩 | Safety valve for nuclear |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |