CN204267817U - Pressure relief safety valve - Google Patents
Pressure relief safety valve Download PDFInfo
- Publication number
- CN204267817U CN204267817U CN201420719944.XU CN201420719944U CN204267817U CN 204267817 U CN204267817 U CN 204267817U CN 201420719944 U CN201420719944 U CN 201420719944U CN 204267817 U CN204267817 U CN 204267817U
- Authority
- CN
- China
- Prior art keywords
- pressure
- spring
- safety valve
- sealing plate
- pressure relief
- Prior art date
- 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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Abstract
The utility model discloses a kind of pressure relief safety valve, comprise valve body, valve body has influent stream mouth and goes out head piece, influent stream mouth and go out head piece and cut off by sideboard, sideboard is connected to one end of the first spring, and valve body offers function mouth, is provided with sealing plate in function mouth, spring abuts relative to the other end of the first mobile plate and sealing plate, and sealing plate abuts relative to the other end of the first spring pressure alarm mechanism.The purpose of this utility model is to provide a kind of when Direct spring loaded safety valve finds pressure release, can carry out the pressure relief safety valve of the timely pressure release of warning reminding staff.
Description
Technical field
The utility model relates to a kind of safety valve valve technology field, and more particularly, it relates to a kind of safety valve.
Background technique
Safety valve is in normally off under open-shut device is subject to External Force Acting, when the pressure medium in equipment or pipeline increases to over specified value, exceedes the Special valve of specified value by preventing pressure medium in pipeline or equipment to discharge medium outside system.Safety valve belongs to self-acting valve class, and be mainly used on boiler, pressure vessels and pipes, pilot pressure is no more than specified value, has run important protective action to personal safety and equipment.
Further, Direct spring loaded safety valve refer to rely on spring elastic pressure and by Sealing lockings such as the valve of valve or plungers, once the high pressure produced after the pressure anomaly of pressurized container will overcome the spring pressure of safety valve, so blocking device is backed down, define a pressure release passage, high voltage relief is fallen.Be divided into again according to flap Lift difference and complete play formula and micro-formula two kinds.A full formula amount of releasing is large, and spring-back force is good, is applicable to liquids and gases medium, and micro-formula only should be used for liquid medium.
In general, when there is pressure release in the safety valve of micro-formula, staff not easily discovers.Therefore, due to other reasons cause channel inner pressure excessive time, although safety valve can play self-relieving effect, be difficult to the effect playing prompting.
Simultaneously, due to the structural feature of spring type safety, when safety valve conducting, spring directly can contact with flowing medium, if flowing medium itself has corrosivity or strong oxidizing property, spring can be caused to corrode or be oxidized and then lose its elasticity kinetic energy, the pressure release conducting of safety valve impacts.
Model utility content
For the deficiency that prior art exists, the purpose of this utility model is to provide a kind of when Direct spring loaded safety valve finds pressure release, can carry out the pressure relief safety valve of the timely pressure release of warning reminding staff.
For achieving the above object, the utility model provides following technological scheme:
A kind of pressure relief safety valve, comprise valve body, described valve body has influent stream mouth and goes out head piece, described influent stream mouth and go out head piece and cut off by sideboard, described sideboard is connected to one end of the first spring, and described valve body offers function mouth, is provided with sealing plate in described function mouth, described spring abuts relative to the other end of the first mobile plate and sealing plate, and described sealing plate abuts relative to the other end of the first spring pressure alarm mechanism.
The utility model setting further, described pressure alarm mechanism comprises the mechanism shell be communicated with function mouth, has pressure-strain sheet, detection unit and alarm unit in described mechanism shell, and described pressure-strain sheet is connected between sealing plate and mechanism shell;
Described detection unit and pressure-strain sheet couple, and with the change in resistance of detected pressures foil gauge, and export a pressure signal,
Described alarm unit couples the output terminal of detection unit, to open and close an alarm element according to this pressure signal.
Preferably, described pressure-strain sheet with abutted the second spring between sealing plate.
In addition, described mechanism shell detachably has outer housing cover, and described pressure-strain sheet abuts with outer housing cover relative to the other end of the second spring.
In addition, described mechanism shell is tubular, and offers watch window along the axis of this mechanism shell.
Compared with prior art, feature of the present utility model is, when there is pressure release, sideboard, the first spring and sealing plate three can be regarded as an entirety, and together pressure being applied to pressure alarm mechanism, worker safety's valve generation pressure release, being subject to will providing warning when reaching predeterminable level from the pressure of three, is reminded by pressure alarm mechanism, timely check pressure producing cause, improves the efficiency safeguarded, overhaul.
Accompanying drawing explanation
Fig. 1 is the parts drawing of the utility model pressure relief safety valve embodiment;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the A face sectional view of Fig. 2;
Fig. 4 is the structural drawing of the utility model pressure relief safety valve embodiment;
Fig. 5 is the circuit diagram of the utility model pressure relief safety valve embodiment.
Accompanying drawing marks: 1, valve body; 2, the first spring; 3, sideboard; 4, the second spring; 51, mechanism shell; 52, outer housing cover; 6, sealing plate; 7, pressure-strain sheet; 8, light emitting diode; 91, detection unit; 92, alarm unit.
Embodiment
Referring to figs. 1 through Fig. 5, the utility model safety valve embodiment is described further.
A kind of pressure relief safety valve, comprises the valve body 1 in column, offers influent stream mouth and offer out head piece at it at its sidewall in the bottom of valve body 1; Axis along valve body 1 is provided with the sideboard 3 that can move up and down in the below going out head piece.Further, sideboard 3 by influent stream mouth and go out head piece cut off.The top of valve body 1 offers function mouth, and is provided with the sealing plate 6 identical with its bore in function mouth.Further, between sealing plate 6 and sideboard 3, abutting has the first spring 2.Meanwhile, the top of sealing plate 6 abuts and has pressure alarm mechanism.By above-mentioned setting, under normal circumstances, when safety valve internal pressure occurring being excessive, sideboard 3 upwards pushes the first spring 2, first spring 2 also can push the second stir yourself baffle plate in the process of compression, and now sideboard 3 is to top offset, be communicated with influent stream mouth and go out head piece, realizing pressure release.Now, because the first spring has certain [coefficient of, and the active force of both ends of the spring is identical, and therefore sealing plate can apply pressure to pressure alarm circuit, and pressure alarm circuit is reported to the police based on the pressure be subject to.
Preferably, pressure alarm unit 92 is using pressure-strain sheet 7 as the base components of detected pressures and suitable detection unit 91 and alarm unit 92 for the present embodiment.Pressure-strain sheet 7 to be subject to from sealing plate after pressure, can change based on its resistance of piezoresistive effect.Carry out detection to produce a pressure signal in the resistance by a detection unit 91 pairs of pressure-strain sheets 7, trigger an alarm element and report to the police being inputed to alarm unit 92 by pressure signal.
Preferably, detection unit 91 comprises resistance R1, resistance R2 and resistance R3, and above-mentioned three resistance are connected successively with pressure-strain sheet 7, and forms node A, Node B, node C and node D.Wherein Node B and node D are connected to the two ends of an input voltage Uo, and node A and node C is coupled to the forward and reverse input end of LM324 amplifier respectively, and the output terminal of LM324 amplifier is by a resistance R4 ground connection.
Preferably, alarm unit 92 comprises the triode Q1 coupled with the output terminal of LM324; The collector electrode of triode Q1 connects a VDC by resistance R5, and its emitter is successively by ground connection after a light emitting diode 8D1 and resistance R6.
By above-mentioned setting, when the pressure-strain sheet 7 that can realize between node C and node D is under pressure and produces change in resistance, the difference inputing to LM324 two input end changes, LM324 exports a pressure signal to triode Q1 according to this difference, to open triode Q1, be light emitting diode 8 conducting then.The connection of the input end of LM324 herein and the type of triode Q1 coordinate, therefore are not construed as limiting.
In addition, the valve body 1 of the present embodiment is communicated with mechanism shell 51 by function mouth, and the one end being provided with the second spring 4, second spring 4 in mechanism shell 51 abuts with sealing plate 6, and it is inner that the other end is connected to mechanism shell 51.The present embodiment is by supreme bottom valve body 1, and be sideboard 3, first spring 2, sealing plate 6 and the second spring 4 successively, its in the vertical direction achieves the series connection of spring.It should be noted that herein, spring series connection can be that every root both ends of the spring is stressed equal, equivalent stiffness COEFFICIENT K meets K=(K1*K2)/(K1+K2), total [coefficient of is reduced, make when the first spring 2 and the second spring 4 are all normal, its entirety is more accurate, and safety valve reaction is sensitiveer.Wherein K1 is the [coefficient of of the first spring 2, and K2 is the [coefficient of of the second spring 4.
In addition, mechanism shell 51 detachably has outer housing cover 52, and the second spring 4 is connected between pressure-strain sheet 7 and sealing plate 6, and pressure-strain sheet 7 abuts with outer housing cover 52 further.Therefore can change the second spring 4 by opening outer housing cover 52.Ensure, after the second spring 4 lost efficacy, to change the second spring 4, safety valve still can be used.
In addition, mechanism shell 51 is arranged in cylindrical body, offers the inner passage be communicated with function mouth bottom it.On the surface of mechanism shell 51 along cylinder axis to offering the watch window being communicated with this inner passage, be convenient to the decrement that observer observes the second spring 4.Grasp the working state of safety valve.
The above is only preferred implementation of the present utility model, protection domain of the present utility model be not only confined to above-described embodiment, and all technological schemes belonged under the utility model thinking all belong to protection domain of the present utility model.It should be pointed out that for those skilled in the art, do not departing from the some improvements and modifications under the utility model principle prerequisite, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (5)
1. a pressure relief safety valve, comprise valve body, described valve body has influent stream mouth and goes out head piece, described influent stream mouth and go out head piece and cut off by sideboard, described sideboard is connected to one end of the first spring, it is characterized in that: described valve body offers function mouth, is provided with sealing plate in described function mouth, described spring abuts relative to the other end of the first mobile plate and sealing plate, and described sealing plate abuts relative to the other end of the first spring pressure alarm mechanism.
2. pressure relief safety valve according to claim 1, it is characterized in that: described pressure alarm mechanism comprises the mechanism shell be communicated with function mouth, have pressure-strain sheet, detection unit and alarm unit in described mechanism shell, described pressure-strain sheet is connected between sealing plate and mechanism shell;
Described detection unit and pressure-strain sheet couple, and with the change in resistance of detected pressures foil gauge, and export a pressure signal,
Described alarm unit couples the output terminal of detection unit, to open and close an alarm element according to this pressure signal.
3. the pressure relief safety valve according to claim 2, is characterized in that: described pressure-strain sheet with abutted the second spring between sealing plate.
4. the pressure relief safety valve according to claim 3, is characterized in that: described mechanism shell detachably has outer housing cover, and described pressure-strain sheet abuts with outer housing cover relative to the other end of the second spring.
5. the pressure relief safety valve according to claim 2, is characterized in that: described mechanism shell is tubular, and offers watch window along the axis of this mechanism shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719944.XU CN204267817U (en) | 2014-11-25 | 2014-11-25 | Pressure relief safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420719944.XU CN204267817U (en) | 2014-11-25 | 2014-11-25 | Pressure relief safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204267817U true CN204267817U (en) | 2015-04-15 |
Family
ID=52802687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420719944.XU Expired - Fee Related CN204267817U (en) | 2014-11-25 | 2014-11-25 | Pressure relief safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204267817U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930227A (en) * | 2015-06-09 | 2015-09-23 | 李华良 | Safe exhaust valve |
| CN106197838A (en) * | 2016-07-29 | 2016-12-07 | 广东惠利普路桥信息工程有限公司 | A kind of instrument of energy automatic alarm |
| CN106979364A (en) * | 2017-05-18 | 2017-07-25 | 盐城欧润石化设备制造有限公司 | A kind of deadweight safety valve on oil storage tank |
-
2014
- 2014-11-25 CN CN201420719944.XU patent/CN204267817U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104930227A (en) * | 2015-06-09 | 2015-09-23 | 李华良 | Safe exhaust valve |
| CN106197838A (en) * | 2016-07-29 | 2016-12-07 | 广东惠利普路桥信息工程有限公司 | A kind of instrument of energy automatic alarm |
| CN106979364A (en) * | 2017-05-18 | 2017-07-25 | 盐城欧润石化设备制造有限公司 | A kind of deadweight safety valve on oil storage tank |
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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 |
Granted publication date: 20150415 Termination date: 20161125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |