CN104048081B - A kind of rock gas safety valve - Google Patents
A kind of rock gas safety valve Download PDFInfo
- Publication number
- CN104048081B CN104048081B CN201410234774.0A CN201410234774A CN104048081B CN 104048081 B CN104048081 B CN 104048081B CN 201410234774 A CN201410234774 A CN 201410234774A CN 104048081 B CN104048081 B CN 104048081B
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- sensitive switch
- core assembly
- end surface
- valve
- mangetic core
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/34—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
Abstract
The invention provides a kind of rock gas safety valve, comprise valve body, valve gap, air inlet conversion adapter, support, baffle plate and sensitive switch, wherein: described air inlet conversion adapter is connected with valve body, valve body is connected with valve gap, support is connected by screw with valve gap, and described baffle plate, sensitive switch and support are fixed by screw-nut; Described valve body and valve gap form cavity, are placed with mangetic core assembly in described cavity; When the pressure medium in gas burning system pipeline exceedes normal value, under the effect of pressure medium, mangetic core assembly, to sensitive switch generation axial displacement, touches sensitive switch and cuts off circuit; Be provided with Returnning spring between described mangetic core assembly upper-end surface and the lower end surface of described valve gap, when pressure medium recovers normal value, under the effect of Returnning spring, mangetic core assembly, away from sensitive switch generation axial displacement, connects circuit to make sensitive switch.Structure of the present invention is simple, and assembling is quick, and be active in one's movements, control accuracy is high, can be widely used in Gas Industry.
Description
Technical field
The present invention relates to safety valve technical field, be specifically related to a kind of rock gas safety valve, be applicable to the safety protection in rock gas and explosive gas delivery pipeline system.
Background technique
As clean energy resource; natural gas applications is more and more general; the development of compressed natural gas production, conveying, application technology; drive the development of Pipeline transport control unit; current safety valve adopts the mode stable system pressure of direct pressure release mostly; this traditional safety valve often there will be unfavorable factors such as trembling, chatter, Reseating pressure of a safety valve are low, control accuracy is low, causes the waste of the energy.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of rock gas safety valve, in order to automatic shutdown circuit in the superpressure situation that occurs at gas burning system, to ensure the safe and reliable of gas burning system.
To achieve these goals, the invention provides a kind of rock gas safety valve, comprise valve body, valve gap, air inlet conversion adapter, support, baffle plate and sensitive switch, wherein:
Described air inlet conversion adapter is connected with described valve body, and described valve body is connected with described valve gap, and described support is connected by screw with described valve gap, and described baffle plate, described sensitive switch and described support are fixed by screw-nut;
Described valve body and valve gap form cavity, are placed with mangetic core assembly in described cavity;
When the pressure medium in gas burning system pipeline exceedes normal value, under the effect of pressure medium, mangetic core assembly, to sensitive switch generation axial displacement, touches sensitive switch and cuts off circuit;
Be provided with Returnning spring between described mangetic core assembly upper-end surface and the lower end surface of described valve gap, when pressure medium recovers normal value, under the effect of Returnning spring, mangetic core assembly, away from sensitive switch generation axial displacement, connects circuit to make sensitive switch.
Further, described mangetic core assembly comprises spool, liner, locking nut, diaphragm and sealing gasket, wherein:
One deck liner, diaphragm and another layer of liner stack formation three-decker successively;
Described sealing gasket, described three-decker and described locking nut are installed on described spool successively, and described locking nut is for being locked at described spool by described three-decker and described sealing gasket;
By realizing sealing to the extruding of diaphragm between described valve body and valve gap;
Described diaphragm with under the effect of the pressure medium of part in gas burning system pipeline of other form touch does not produce deformation, is subjected to displacement band movable valve plug and moves, thus control the break-make of sensitive switch.
Further, an adjusting nut is equipped with between described mangetic core assembly and described sensitive switch, by the distance of locking nut upper-end surface in adjustment adjusting nut adjustable adjusting nut lower end surface and mangetic core assembly, thus regulate the stroke of described mangetic core assembly, to ensure that mangetic core assembly touches the reliability of sensitive switch.
Further, at the pressing position of described valve body and diaphragm, valve body faying surface has opened twice annular recess, groove is to ensure the reliability sealed.
Further, described locknut, adjusting nut and sensitive switch composition position-limit mechanism, described locknut is used for locking adjusting nut after described adjusting nut regulates stroke;
Described position-limit mechanism starts assembling after valve body, valve gap, Returnning spring, mangetic core assembly have assembled;
Described spool lower end surface with step surface in valve body for support, now spool is in the spacing state in lower end, gently the adjusting nut of position-limit mechanism is screwed in the tapped hole on valve gap, stop the rotation when position-limit mechanism lower end surface contacts with the locking nut on mangetic core assembly, measure position-limit mechanism upper-end surface and valve gap upper-end surface distance H1;
Slowly screw out position-limit mechanism after measurement completes, then record position-limit mechanism upper-end surface and valve gap upper-end surface distance H2, H2-H1 is now the maximum displacement of spool movement;
When spool moves to maximum displacement, fit in mangetic core assembly upper-end surface and position-limit mechanism lower end surface, mangetic core assembly is limited, realizes limit function thus.
Further, described support adopts right-angle structure, its one end is fixed by screws on valve gap, sensitive switch is fixed on the opposite side at support right angle, on support, the installation dimension of fixed hole need ensure that lower end surface, sensitive switch contact and gap, spool upper-end surface are 0.5mm, and the axis of spool aligns with the contact center lines of sensitive switch.
Further, described valve body has throttle orifice, enter in the cavity that valve body and diaphragm formed, to the impact that diaphragm causes to be reduced in emergency circumstances gas through switching device.
Further, add two-layer epoxy glass cloth laminated board in the both sides of described sensitive switch, to protect sensitive switch.
Preferably, be connected by screw thread between described valve body with described valve gap, be convenient to assembling.
Preferably, the stroke of described sensitive switch is 2.5mm.
Compared with prior art, the present invention has following beneficial effect:
1, the invention provides a kind of novel natural gas safety valve, when the pressure medium in gas burning system pipeline is abnormal, under the effect of pressure medium, mangetic core assembly starts action, spool is made to produce axial displacement, touch sensitive switch, automatic cutting system circuit, has run important protective action to personal safety and equipment;
2, rock gas relief valve design provided by the present invention adopts mangetic core assembly structure, valve is inner with spool position-limit mechanism, utilize spring and act on the effective control of equilibrium of forces realization to connecting and disconnecting of the circuit on diaphragm, adopt diaphragm actuating mechanism, can regulating spool displacement amount accurately, make product effectively realize safety protection function in the entire system;
3, the present invention adopts the break-make of sensitive switch control circuit, and this safety valve has also carried out the mechanism design at switch position, carries out structure optimization, achieves the reliable control to sensitive switch;
4, structure of the present invention is simple, assembling is quick, be active in one's movements, easy to use, control accuracy is high, reliability is high, Gas Industry can be widely used in, be particularly useful in the gas control system that space is little, control accuracy is high, highly sensitive, can realize the function of safety protection in natural gas system, anti-locking system is because pressure anomaly causes security incident.
Accompanying drawing explanation
Fig. 1 is the internal structure schematic diagram of rock gas safety valve of the present invention;
Fig. 2 is the mangetic core assembly structural representation of rock gas safety valve of the present invention;
Fig. 3 is the appearance schematic diagram of rock gas safety valve of the present invention;
Fig. 4 is vent schematic diagram in the spool of rock gas safety valve of the present invention;
In all of the figs, identical reference character is used for representing identical element or structure, wherein:
1-sealing gasket 2-valve body 3-mangetic core assembly 4-Returnning spring 5-adjusting nut 6-support 7-sensitive switch 8-baffle plate 9-screw 10-nut 11-locknut 12-valve gap 13-air inlet conversion adapter 101-spool 102-liner 103-locking nut 104-diaphragm 105-sealing gasket.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.In addition, if below in described each mode of execution of the present invention involved technical characteristics do not form conflict each other and just can mutually combine.
The technological scheme that the present invention takes is: a kind of novel natural gas safety valve; when the pressure medium in gas burning system pipeline is abnormal; under the effect of pressure medium; mangetic core assembly 3 starts action; mangetic core assembly 3 is made to produce axial displacement; touch sensitive switch 7, automatic cutting system circuit, has run important protective action to personal safety and equipment.Because this rock gas Safety valve body 2 volume is little, compact structure, control accuracy requires high, and have requirement of explosion proof, in the design through taking into full account, innovative design is carried out in interiors of products structure, the part being in relative sliding all adopts metal to coordinate with non-metallic material, avoid in friction process, produce spark to set off an explosion, the design of this valve adopts mangetic core assembly 3 structure, valve is inner with spool position-limit mechanism, utilizes Returnning spring 4 and acts on the effective control of equilibrium of forces realization to connecting and disconnecting of the circuit on diaphragm.Adopt diaphragm actuating mechanism; can regulating spool displacement amount accurately, make product effectively realize safety protection function in the entire system, this safety valve has also carried out the mechanism design at switch position in addition; carry out structure optimization, achieve the reliable control to sensitive switch 7.Its beneficial effect is the safety protection achieving gas burning system, prevents system overpressure from causing security incident, is particularly useful in the gas control system that space is little, control accuracy is high, highly sensitive.It can in system overpressure situation automatic shutdown circuit, work on after System recover is normal, energy free is wasted, highly sensitive, safe and reliable.
The invention provides a kind of rock gas safety valve, mainly comprise valve body 2, valve gap 12, air inlet conversion adapter 13, support 6, baffle plate 8 and sensitive switch 7, air inlet conversion adapter 13 is connected by screw thread with valve body 2, valve body 2 is connected by screw thread with valve gap 12, and support 6 is connected by screw with valve gap 12, and baffle plate 8, support 6 and sensitive switch 7 are fixed together by screw and nut.Mangetic core assembly 3 is placed in the cavity that valve body 2 is formed with valve gap 12.When the pressure medium in gas burning system pipeline exceedes normal value, under the effect of pressure medium, there is axial displacement to sensitive switch 7 in mangetic core assembly 3, touches sensitive switch 7 and cut off circuit;
Between described mangetic core assembly 3 upper-end surface and the lower end surface of described valve gap 12, Returnning spring 4 is installed, when pressure medium recovers normal value, under the effect of Returnning spring 4, there is axial displacement away from sensitive switch 7 in mangetic core assembly 3, connects circuit to make sensitive switch 7.
Described mangetic core assembly 3 comprises spool 101, liner 102, locking nut 103, diaphragm 104 and sealing gasket 105, wherein:
One deck liner 102, diaphragm 104 stack formation three-decker successively with another layer of liner 102;
Described sealing gasket 105, described three-decker and described locking nut 103 are installed on described spool 101 successively, and described locking nut 103 is for being locked at described spool 101 by described three-decker and described sealing gasket 105;
By realizing sealing to the extruding of diaphragm 104 between described valve body 22 and valve gap 12;
Described diaphragm 104 with under the effect of the pressure medium of part in gas burning system pipeline of other form touch does not produce deformation, is subjected to displacement band movable valve plug 101 and moves, thus control the break-make of sensitive switch 7.
An adjusting nut 5 is equipped with between described mangetic core assembly 3 and described sensitive switch 7, by the distance of locking nut 103 upper-end surface in adjustment adjusting nut 5 adjustable adjusting nut 5 lower end surface and mangetic core assembly 3, thus regulate the stroke of described mangetic core assembly 3, to ensure that mangetic core assembly 3 touches the reliability of sensitive switch 7.
V-type groove is had in sealing place valve body 2 one end; ensure that sealing is reliable; by the stroke of adjustment adjusting nut 5 adjustable valve core assembly 3; the micro-displacement band movable valve plug of diaphragm is utilized to move; the break-make of sensitive switch 7 is controlled with this; ensure that it touches the reliability of sensitive switch 7, realize safety protection function.Because medium is rock gas, be inflammable and explosive gas, therefore consider explosion-proof factor in design, the part being in relative sliding all adopts metal to coordinate with non-metallic material, avoids in friction process, produce spark and sets off an explosion.
In case of emergency; gas enters in the cavity that valve body 2 and diaphragm formed through switching device; valve body 2 has throttle orifice; effectively reduce the impact of gas pressure to diaphragm; liner, locking nut, the mangetic core assembly 3 of diaphragm, rubber pad and spool composition is with movable valve plug to move up under the effect of gas pressure, and spool touches sensitive switch 7 in upper process of moving; cut off circuit, important protective action has been run to personal safety and equipment.
Valve body of safety valve 2 adopts with valve gap 12 form that is threaded, be convenient to assembling, in order to ensure the sealing reliability of safety valve, at the pressing position of valve body 2 with diaphragm, valve body 2 faying surface has opened twice annular recess, groove depth 0.4mm, channel section is equilateral triangle, well ensure that the reliability of sealing.This safety valve requires that medium air pressure starts action when 0.03MPa, and open completely during 0.05MPa, control accuracy is high, and it is 0-1MPa that this valve adapts to pressure range.
Due to sensitive switch 7, to trigger stroke shorter, be only 2.5mm, in order to ensure spool trigger sensitive switch 7 process in accurately and reliably, avoid causing damage to sensitive switch 7, therefore in product structure design, carried out the design of position-limit mechanism, position-limit mechanism is primarily of mangetic core assembly 3, adjusting nut 5, locknut 11 and sensitive switch 7 form, when valve body 2, valve gap 12, spring, after mangetic core assembly 3 etc. has assembled, start to assemble position-limit mechanism, because spool lower end surface with step surface in valve body 2 for support, so spool 101 is now in the spacing state in lower end, gently position-limit mechanism is screwed in the tapped hole on valve gap 12, when being screwed into position-limit mechanism lower end surface and just contacting with the locking nut on mangetic core assembly 3, stop the rotation, measure position-limit mechanism upper-end surface and valve gap 12 upper-end surface distance H1, slowly position-limit mechanism is screwed out after measurement completes, record position-limit mechanism upper-end surface and valve gap 12 upper-end surface distance H2 again, ensure H2-H1=3mm, 3mm is now the maximum displacement of mangetic core assembly 3 movement, when mangetic core assembly 3 moves to maximum displacement, fit in mangetic core assembly 3 upper-end surface and position-limit mechanism lower end surface, mangetic core assembly 3 is limited, thus achieve limit function, this structural design not only ensure that the reliability of control, and it is simple and easy to do in debugging.
In order to ensure sensitive switch 7 accuracy of action and reliability, the design adopts support 6 structural type to be fixed sensitive switch 7, support 6 adopts right-angle structure form, one end is fixed by screws on valve gap 12, sensitive switch 7 is fixed on the opposite side at support 6 right angle, by calculating, determine the installation dimension of fixed hole on support 6, ensure that lower end surface, sensitive switch 7 contact and gap, mangetic core assembly 3 upper-end surface are 0.5mm, spool 101 axis aligns with contact center lines, in order to protect sensitive switch 7, install two-layer epoxy glass cloth laminated board additional to protect in the both sides of sensitive switch 7, this support 6 structure can well ensure the break-make reliability of sensitive switch 7 and the protection safety of sensitive switch 7.
Particularly, as depicted in figs. 1 and 2, the invention provides a kind of novel natural gas safety valve, air inlet conversion adapter 13 and valve body 2 are threaded connection, valve body 2 and valve gap 12 are together by a threaded connection, support 6 is fixed by screws on valve gap 12 upper-end surface, and baffle plate 8 is fixed on the frame 6 by screw 9 and nut 10 together with sensitive switch 7; Sealed by sealing gasket 1 between air inlet conversion adapter 13 and valve body 2, valve body 2 has
throttle orifice, at the pressing position of valve body 2 with diaphragm 104, valve body 2 faying surface has opened twice annular recess, groove depth 0.4mm, and channel section is equilateral triangle, ensures that sealing is reliable.As shown in Figure 3, be the schematic appearance of rock gas safety valve of the present invention.
Mangetic core assembly 3 is placed in the cavity that valve body 2 forms with valve gap 12, mangetic core assembly 3 is by spool 101, liner 102, locking nut 103, diaphragm 104 and sealing gasket 105 form, as shown in Figure 4, in spool 101, symmetry has 4 vents, distance between spool 101 upper-end surface and sensitive switch 7 lower end surface is 0.5mm, mangetic core assembly 3 is positioned by the step surface on valve body 2, Returnning spring 4 is housed between mangetic core assembly 3 and valve gap 12, by regulating the distance of locking nut upper-end surface in adjusting nut 5 adjustable adjusting nut 5 lower end surface and mangetic core assembly 3, and then can the stroke of regulating spool assembly 3, regulating spool assembly 3 stroke is 3mm, after adjusting stroke, lock with locknut 1111 pairs of adjusting nuts 5, it is 2.5mm that sensitive switch 7 triggers stroke shorter, when system pressure is abnormal, mangetic core assembly 3 starts action when 0.03MPa, open completely during 0.05MPa, touch sensitive switch 7, cut off circuit, protective system, after normal to pressure recover, under the effect of Returnning spring 4, mangetic core assembly 3 gets back to initial position, sensitive switch 7 resets, system worked well.This safety valve control accuracy is high, and maximum service pressure can reach 1.5MPa.
Present invention achieves the safety protection function of gas burning system, simple and convenient, prevent system pressure from extremely causing security incident, be particularly useful in the gas control system that space is little, control accuracy is high, highly sensitive.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a rock gas safety valve, is characterized in that, comprises valve body (2), valve gap (12), air inlet conversion adapter (13), support (6), baffle plate (8) and sensitive switch (7), wherein:
Described air inlet conversion adapter (13) is connected with described valve body (2), described valve body (2) is connected with described valve gap (12), described support (6) is connected by screw with described valve gap (12), and described baffle plate (8), described sensitive switch (7) and described support (6) are fixed by screw and nut;
Described valve body (2) and valve gap (12) form cavity, are placed with mangetic core assembly (3) in described cavity;
When the pressure medium in gas burning system pipeline exceedes normal value, under the effect of pressure medium, there is axial displacement to sensitive switch (7) in mangetic core assembly (3), touches sensitive switch (7) and cut off circuit;
Returnning spring (4) is installed between the lower end surface of described mangetic core assembly (3) upper-end surface and described valve gap (12), when pressure medium recovers normal value, under the effect of Returnning spring (4), there is axial displacement away from sensitive switch (7) in mangetic core assembly (3), connects circuit to make sensitive switch (7);
Wherein, described mangetic core assembly (3) comprises spool (101), liner (102), locking nut (103), diaphragm (104) and sealing gasket (105), wherein:
One deck liner (102), diaphragm (104) and another layer of liner (102) stack formation three-decker successively;
Described sealing gasket (105), described three-decker and described locking nut (103) are installed on described spool (101) successively, and described locking nut (103) is for being locked at described spool (101) by described three-decker and described sealing gasket (105);
By realizing sealing to the extruding of diaphragm (104) between described valve body (2) and valve gap (12);
Described diaphragm (104) with under the effect of the pressure medium of part in gas burning system pipeline of other form touch does not produce deformation, is subjected to displacement band movable valve plug (101) mobile, thus controls the break-make of sensitive switch (7).
2. rock gas safety valve as claimed in claim 1, it is characterized in that, an adjusting nut (5) is equipped with between described mangetic core assembly (3) and described sensitive switch (7), by the distance of locking nut (103) upper-end surface in adjustment adjusting nut (5) adjustable adjusting nut (5) lower end surface and mangetic core assembly (3), thus regulate the stroke of described mangetic core assembly (3), to ensure that mangetic core assembly (3) touches the reliability of sensitive switch.
3. rock gas safety valve as claimed in claim 1 or 2, it is characterized in that, at the pressing position of described valve body (2) with diaphragm (104), valve body (2) faying surface has opened twice annular recess, groove is to ensure the reliability sealed.
4. rock gas safety valve as claimed in claim 1, it is characterized in that, locknut (11), adjusting nut (5) and sensitive switch (7) composition position-limit mechanism, described locknut (11) for locking adjusting nut (5) after described adjusting nut (5) regulates stroke;
Described position-limit mechanism starts assembling at valve body (2), valve gap (12), Returnning spring (4), mangetic core assembly (3) after having assembled;
Described spool (101) lower end surface is support with valve body (2) interior step surface, now spool is in the spacing state in lower end, gently the adjusting nut (5) of position-limit mechanism is screwed in the tapped hole on valve gap (12), stop the rotation when position-limit mechanism lower end surface contacts with the locking nut (103) on mangetic core assembly (3), measure position-limit mechanism upper-end surface and valve gap upper-end surface distance H1;
Slowly screw out position-limit mechanism after measurement completes, then record the maximum displacement that position-limit mechanism upper-end surface and valve gap (12) upper-end surface distance H2, H2-H1 are now spool (101) movement;
When spool (101) moves to maximum displacement, fit in mangetic core assembly (3) upper-end surface and position-limit mechanism lower end surface, and mangetic core assembly (3) is limited, realizes limit function thus.
5. rock gas safety valve as claimed in claim 1, it is characterized in that, described support (6) adopts right-angle structure, its one end is fixed by screws on valve gap (12), sensitive switch (7) is fixed on the opposite side at support (6) right angle, the installation dimension of the upper fixed hole of support (6) need ensure that sensitive switch (7) lower end surface, contact and spool (101) gap, upper-end surface are 0.5mm, and the axis of spool (101) aligns with the contact center lines of sensitive switch (7).
6. rock gas safety valve as claimed in claim 1, it is characterized in that, (2) have throttle orifice to described valve body, enter in the cavity that valve body (2) and diaphragm (104) formed, to the impact that diaphragm causes to be reduced in emergency circumstances gas through switching device.
7. rock gas safety valve as claimed in claim 1, is characterized in that, add two-layer epoxy glass cloth laminated board in the both sides of described sensitive switch (7), to protect sensitive switch (7).
8. rock gas safety valve as claimed in claim 1, be is characterized in that, be connected between described valve body (2) with described valve gap (12) by screw thread, is convenient to assembling.
9. rock gas safety valve as claimed in claim 1, it is characterized in that, the stroke of described sensitive switch (7) is 2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234774.0A CN104048081B (en) | 2014-05-29 | 2014-05-29 | A kind of rock gas safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410234774.0A CN104048081B (en) | 2014-05-29 | 2014-05-29 | A kind of rock gas safety valve |
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| CN104048081A CN104048081A (en) | 2014-09-17 |
| CN104048081B true CN104048081B (en) | 2016-04-13 |
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| CN201410234774.0A Active CN104048081B (en) | 2014-05-29 | 2014-05-29 | A kind of rock gas safety valve |
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| CN105090574B (en) * | 2015-08-21 | 2018-02-23 | 湖北三江航天红峰控制有限公司 | A kind of pressure-sensitive switch for being adapted to high-temperature gas |
| CN107883050A (en) * | 2017-11-14 | 2018-04-06 | 国家电网公司 | A kind of general valve core of the electromagnetic valve action feedback device |
| CN110043702A (en) * | 2018-01-16 | 2019-07-23 | 广东科维机械设备有限公司 | Alarm pressure safety valve |
| CN108799525B (en) * | 2018-09-10 | 2024-02-23 | 陕西博菲特流体控制装备制造有限公司 | Needle type pressure reducing valve pressure reducing structure with double centering guide structures |
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| DE3321561A1 (en) * | 1983-06-15 | 1984-12-20 | Vdo Adolf Schindling Ag, 6000 Frankfurt | Switching device for a temperature switch or pressure switch |
| JPS6097232A (en) * | 1983-11-01 | 1985-05-31 | Nippon Denso Co Ltd | Pressure detector |
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| CN104048081A (en) | 2014-09-17 |
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