CN105090574A - Pressure induction switch suitable for high-temperature gas - Google Patents
Pressure induction switch suitable for high-temperature gas Download PDFInfo
- Publication number
- CN105090574A CN105090574A CN201510520451.2A CN201510520451A CN105090574A CN 105090574 A CN105090574 A CN 105090574A CN 201510520451 A CN201510520451 A CN 201510520451A CN 105090574 A CN105090574 A CN 105090574A
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- CN
- China
- Prior art keywords
- pressure
- sensitive switch
- push rod
- spool
- spring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/003—Safety valves; Equalising valves, e.g. pressure relief valves reacting to pressure and temperature
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
- Temperature-Responsive Valves (AREA)
Abstract
The invention discloses a pressure induction switch suitable for high-temperature gas and belongs to the field of sensors (control). In the prior art, the difficulty in design, machining and improvement of a mechanical pressure reducer used for achieving a pressure reduction function under the high temperature is large, but pressure reduction is easy to achieve through a pressure reduction system with a pressure induction signal switch. The pressure induction switch comprises a valve body (1), a valve core (4), a bonnet (5), an ejection rod (6), a spring (8), an upper cover (9), a support (10) and a microswitch (11). By means of the pressure induction switch, induction of pressure change of high-temperature gas is achieved, a signal source is provided for an automatic control system, and the pressure induction switch has the characteristics of being simple in structure, easy to assemble and disassemble, small in size, low in weight, wide in adaptability and the like.
Description
Technical field
The invention belongs to sensor (control) field, more specifically, relate to a kind of pressure-sensitive switch being adapted to high-temperature gas.
Background technique
In high-temperature gas appearance control techniques field, relative to traditional posture control system, tolerating 1000 DEG C of high temperature becomes the maximum difficult problem of all component.The pressure-reducing function of normal temperature posture control system has been come by mechanical type decompressor, and mechanical decompressor complex structure, at high temperature realize pressure-reducing function, design, processing improve difficulty larger, therefore depressurized system is adopted to reduce design and difficulty of processing, realize high-temperature gas decompression, high-temperature pressure-reduction system needs the pressure-sensitive switch responding to high-temperature gas as the control signal source automatically controlled.
Summary of the invention
For problems of the prior art, the application provides a kind of pressure-sensitive switch being adapted to high-temperature gas, wherein by studying the concrete structure of valve body, spool and sensitive switch and set-up mode thereof and relate to, mutually should be able to realize pressure sensitive on more compact structure, be easier to as automatic control system provides signal source with existing product, possess the advantages such as volume is little, quality is light simultaneously, be thus particularly useful for the application of high-temperature gas.
For achieving the above object, according to one aspect of the present invention, provide a kind of pressure-sensitive switch being adapted to high-temperature gas, it is characterized in that, described switch comprises valve body (1), spool (4), valve gap (5), push rod (6), spring (8), upper cover (9), support (10), sensitive switch (11);
Described spool (4) is contained in the piston cylinder and hot channel that described valve body (1) and described valve gap (5) form, described spool (4) one end is with piston head, the piston head of described spool 4 is contained in described piston cylinder, the other end of described spool (4) docks with described push rod (6), and described spring (8) is enclosed within described push rod (6);
Described support (10) is arranged on described upper cover (9), and described sensitive switch (11) is fixed on described support (10).
Preferably, described piston cylinder and described piston head are by size Control, and carry out spacing with the described valve gap (5) after assembling to the stroke of piston, what prevent excessive forces is delivered to sensitive switch, damage switch.
Preferably, the other end of described spool (4) is bulb, and the capable globulate docking of spherical arc of the major diameter end face of described bulb and described push rod (6), forms automatic capturing function.
Preferably, the bulb of described spool (4), the major diameter end face of described push rod (6), be enclosed within the thermal insulating pad (7) of the major diameter end face laminating of described push rod (6) and described push rod (6), be enclosed within the described spring (8) that described push rod (6) is pressed on thermal insulating pad and be contained in the installation cavity of described valve gap (5).
Preferably, the preferred refractory alloy of material of described valve body (1), described valve gap (5), described spool (4) or titanium master alloy, the preferred refractory alloy of spring material; The preferred high silica phenolic resin of described thermal insulating pad (7) material.
Preferably, the centre pilot hole that described push rod (6) small-diameter sized one end is reserved through described upper cover (9), immediately below the contact being fixed on the described sensitive switch (11) on described support (10).
In general, according to above-mentioned technical conceive of the present invention compared with prior art, following technological merit is mainly possessed:
1, high-temperature gas pressure-sensitive switch of the present invention achieves and at high temperature responds to gas pressure, simultaneously for automatic control system provides signal source;
2, high-temperature gas pressure-sensitive switch of the present invention can adapt to the pressure sensitive of high-temperature gas under different pressures by the diameter dimension changing piston cylinder and piston head, has general adaptability.
3, high-temperature gas pressure-sensitive switch of the present invention has structure and is simple and easy to assembly and disassembly, and the feature such as volume is little, lightweight, high temperature resistant.
Accompanying drawing explanation
Fig. 1 is the high-temperature gas pressure-sensitive switch overall structure sectional view constructed by the preferred embodiment of the present invention.
In all of the figs, identical reference character is used for representing identical element or structure, wherein: 1-valve body, 2-dynamic seal ring, 3-sealing gasket, 4-spool, 5-valve gap, 6-push rod, 7-thermal insulating pad, 8-spring, 9-upper cover, 10-support, 11-sensitive switch, 12-protection apron δ-piston stroke Φ-piston diameter A-locating groove B-spherical docking F
1-gas pressure F
2-initial tension of spring P-gas pressure △ P-gas pressure change.
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.
As shown in Figure 1, high-temperature gas pressure-sensitive switch provided by the invention comprises valve body 1, dynamic seal ring 2, sealing gasket 3, spool 4, valve gap 5, push rod 6, thermal insulating pad 7, spring 8, upper cover 9, support 10, sensitive switch 11, protection apron 12.
Valve body 1 one end is with piston cylinder and positioning groove, and the other end is threaded import interface; Valve gap 5 one end plane is with positioning boss and have flange connecting hole, and the other end is with cylindrical installation cavity, and centre is the tubular radiator with radiating groove; Valve body 1 and valve gap 5, by groove and boss location, couple together with flange; Flexible graphite sealing pad 3 is lined with between groove and boss.Have two seals groove, spool 4 piston head installing twice dynamic seal ring 2 is contained in the piston cylinder of valve body 1; The valve rod of spool 4 then at valve gap 5 with in the tubular radiator of radiating groove; The other end of spool 4 is bulbs, is formed spherically dock B with the spherical arc of push rod 6 major diameter end face; High silica phenolic resin thermal insulating pad 7 is enclosed within push rod 6 and the laminating of push rod 6 major diameter end face, and spring 8 is enclosed within push rod 6 and thermal insulating pad 7 is fitted; The bulb of spool 4, push rod 6, thermal insulating pad 7, spring 8 are contained in the cylindrical installation cavity of valve gap 5; Upper cover 9 is connected by the cylindrical installation cavity one end of screw thread and valve gap 5, and the inner face of upper cover 9 is pressed on spring 8, makes spring 8 produce pretightening force F2; Support 10 is screwed on upper cover 9, both sides are with the sensitive switch 11 of protection apron 12, be fixed on support by bolt, nut, make the contact of sensitive switch 11 pass directly over the center of push rod 6 small-diameter sized one end in upper cover 9 centre pilot hole by adjustment bolt position; The collaborative change of described piston diameter and initial tension of spring, can make this switch adapt to the change of gas with various pressure.
The working principle of example of the present invention is: after high-temperature gas pressure-sensitive switch connecting system, when system pressure P increases, when exceeding upper limit set value (P+ △ P), and gas pressure F
1increase, gas pressure F
1be greater than spring 8 pretightening force F
2promote spool 4 to move, and then promotion push rod 6 moves, until push rod 6 small size diameter end top is to the contact of sensitive switch 11, produce trigger signal, the cooperation at valve gap 5 and valve body 1 place simultaneously forms the spacing of piston stroke δ, prevents the excessive pressure F1 of gas to be delivered to sensitive switch 11, damages sensitive switch 11; When gas pressure P reduces, during lower than lower limit set value (P-△ P), gas pressure reduces, gas pressure F
1be less than initial tension of spring F
2, at spring force F
2under effect, promote push rod 6 and spool 4, until the contact of push rod 6 and sensitive switch 11 departs from, former trigger signal disappears; By trigger signal and triggering disappearance of signal, provide automatic control signal source to automatic control system.
Controlled by the fit tolerance of the axially locating draw-in groove A formed the groove of valve body 1 and the boss of valve gap 5 in example of the present invention, guarantee that the central coaxial of solid of rotation valve gap 5 and valve body 1 is better, and then ensure that solid of rotation spool 4 is better coaxial with the two.
Be designed at the position that spool 4 contacts with push rod 6 in example of the present invention spherically dock B to the spherical of ball watt, the valve rod realizing push rod 6 and spool 5 automatic capturing center when transmitting force under axial long size, guarantees that force and motion all carries out at axis direction.
When the groove of valve body 1 and the boss of valve gap 5 are installed in example of the present invention, flexible graphite sealing pad 3 is housed therebetween, realizes high temperature lower seal dust-proof.
In example of the present invention, the piston head of spool 4 and the piston cylinder Seal Design of valve body 1 are dual motive sealing, dynamic seal ring 2 material preferred flexible graphite, guarantee that motive sealing is reliable, can play simultaneously centering with.
By the piston cylinder degree of depth of control valve body 1 and the piston head length of spool 4 in example of the present invention, form the stroke δ of spool 4, carry out spacing with the lower end surface of the valve gap 5 be arranged on valve body 1, the trip δ can ensure that spool 4 moves, and then promote the contact that push rod 6 can promote sensitive switch 11 when moving, produce trigger signal, can guarantee again because of air pressure P increase time, excessive thrust gas can not be delivered to the contact of sensitive switch 11, damages sensitive switch 11..
In example of the present invention, the long-neck sleeve pipe Thermal packer design of valve gap 5 can be dispelled the heat preferably, the high-temperature gas heat reducing valve body 1 piston cylinder transmits, and lower thermal conductivity thermal insulating pad 7 uses, further retarding heat transmission, guarantee that the heat being delivered to spring 8 place is less, temperature is lower, reduces high temperature to the impact of spring 8 elastic force, improves induction precision, the application of support 10 and protection apron 12, further heat radiation and thermal resistance, make the temperature at sensitive switch 11 place close to normal temperature, increases the range of choice of sensitive switch 11.
The piston head diameter Φ of spool 4 and spring 8 pretightening force F in example of the present invention
2collaborative change, can adapt to the use of gas with various pressure P.Its dependency relation is as follows:
Wherein: F
1=Π φ
2p/4
F
2＝F
20+Kδ
When pressure is (P+ △ P), F
1=Π φ
2(P+ △ P)/4 > F
2=F
20+ K δ, produces trigger signal;
When pressure is (P-△ P), F
1=Π φ
2(P-△ P)/4 > F
2=F
20, disconnect starting signal.
Installation process of the present invention is as follows:
(1) check, clean all parts;
(2) dynamic seal ring 2 is put in the seal groove of piston head of spool 4, spool 4 is put in the piston cylinder of valve body 1, sealing gasket 3 is put in the groove of valve body 1, valve gap 5 is enclosed within the valve rod of spool 4, located by the groove of boss and valve body 1, connect with bolt, nut;
(3) spherical arc one end and the docking of spool 4 bulb of having the push rod 6 of thermal insulating pad 7 and spring 8 will be overlapped successively, and be placed in the installation cavity of valve gap 5, upper cover 9 and valve gap 5 are screwed, holddown spring 8, produce pretightening force F
20;
(4) support 10 is screwed on upper cover 9, sensitive switch 11 both sides are placed on two protection aprons 12, with bolt, nut, three is fixed over the mount 10, guarantee that the contact of sensitive switch 11 is directly over the center of push rod 6 by adjustment bolt position.
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 (6)
1. one kind is adapted to the pressure-sensitive switch of high-temperature gas, it is characterized in that, described switch comprises valve body (1), spool (4), valve gap (5), push rod (6), spring (8), upper cover (9), support (10), sensitive switch (11);
Described spool (4) is contained in the piston cylinder and hot channel that described valve body (1) and described valve gap (5) form, described spool (4) one end is with piston head, the piston head of described spool 4 is contained in described piston cylinder, the other end of described spool (4) docks with described push rod (6), described spring (8) is enclosed within described push rod (6), and the inner face of described upper cover (9) is pressed on described spring (8);
Described support (10) is arranged on described upper cover (9), and described sensitive switch (11) is fixed on described support (10).
2. pressure-sensitive switch as claimed in claim 1, it is characterized in that, described valve gap (5) has hot channel, can dispel the heat preferably; Described pressure-sensitive switch also comprises thermal insulating pad (7), and described thermal insulating pad (7) has good heat-shielding performance, and make high temperature less on spring impact, high temperature not easily passes to sensitive switch, can respond to the pressure change of high-temperature gas; Described piston cylinder and described piston head pass through size Control.
3. pressure-sensitive switch as claimed in claim 1, is characterized in that, carry out spacing with the described valve gap (5) after assembling to the stroke of piston, what prevent excessive forces is delivered to sensitive switch, damages switch; The other end of described spool (4) is bulb, and the capable globulate docking of spherical arc of the major diameter end face of described bulb and described push rod (6), forms automatic capturing function.
4. pressure-sensitive switch as claimed in claim 1, it is characterized in that, the bulb of described spool (4), the major diameter end face of described push rod (6), be enclosed within the thermal insulating pad (7) of the major diameter end face laminating of described push rod (6) and described push rod (6), be enclosed within the described spring (8) that described push rod (6) is pressed on thermal insulating pad and be contained in the installation cavity of described valve gap (5).
5. pressure-sensitive switch as claimed in claim 1, is characterized in that, the preferred refractory alloy of material of described valve body (1), described valve gap (5), described spool (4) or titanium master alloy, the preferred refractory alloy of spring material; The preferred high silica phenolic resin of described thermal insulating pad (7) material.
6. pressure-sensitive switch as claimed in claim 1, it is characterized in that, the centre pilot hole that described push rod (6) small-diameter sized one end is reserved through described upper cover (9), immediately below the contact being fixed on the described sensitive switch (11) on described support (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520451.2A CN105090574B (en) | 2015-08-21 | 2015-08-21 | A kind of pressure-sensitive switch for being adapted to high-temperature gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510520451.2A CN105090574B (en) | 2015-08-21 | 2015-08-21 | A kind of pressure-sensitive switch for being adapted to high-temperature gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105090574A true CN105090574A (en) | 2015-11-25 |
| CN105090574B CN105090574B (en) | 2018-02-23 |
Family
ID=54571612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510520451.2A Active CN105090574B (en) | 2015-08-21 | 2015-08-21 | A kind of pressure-sensitive switch for being adapted to high-temperature gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105090574B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855444A (en) * | 2016-12-02 | 2017-06-16 | 武汉航空仪表有限责任公司 | A kind of low pressure signalling means |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6097232A (en) * | 1983-11-01 | 1985-05-31 | Nippon Denso Co Ltd | Pressure detector |
| CN85105826A (en) * | 1984-10-02 | 1986-03-10 | Tlv有限公司 | Pressure reducing valve with pressure automatic setting |
| CN87101799A (en) * | 1986-03-11 | 1987-09-23 | 法码通公司 | Hydraulic shock-absorber of beat and the application on valve part thereof |
| CN201043614Y (en) * | 2007-03-13 | 2008-04-02 | 辽宁良工阀门厂 | Pressure reducing and decompression regulating valve |
| CN103672143A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Safety valve pressure warning device |
| CN203500492U (en) * | 2013-10-12 | 2014-03-26 | 浙江盾安阀门有限公司 | Self-centering valve flap seal protection check valve |
| CN104048081A (en) * | 2014-05-29 | 2014-09-17 | 湖北三江航天红峰控制有限公司 | Natural gas safety valve |
-
2015
- 2015-08-21 CN CN201510520451.2A patent/CN105090574B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6097232A (en) * | 1983-11-01 | 1985-05-31 | Nippon Denso Co Ltd | Pressure detector |
| CN85105826A (en) * | 1984-10-02 | 1986-03-10 | Tlv有限公司 | Pressure reducing valve with pressure automatic setting |
| CN87101799A (en) * | 1986-03-11 | 1987-09-23 | 法码通公司 | Hydraulic shock-absorber of beat and the application on valve part thereof |
| CN201043614Y (en) * | 2007-03-13 | 2008-04-02 | 辽宁良工阀门厂 | Pressure reducing and decompression regulating valve |
| CN103672143A (en) * | 2012-09-21 | 2014-03-26 | 成都市思博睿科技有限公司 | Safety valve pressure warning device |
| CN203500492U (en) * | 2013-10-12 | 2014-03-26 | 浙江盾安阀门有限公司 | Self-centering valve flap seal protection check valve |
| CN104048081A (en) * | 2014-05-29 | 2014-09-17 | 湖北三江航天红峰控制有限公司 | Natural gas safety valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106855444A (en) * | 2016-12-02 | 2017-06-16 | 武汉航空仪表有限责任公司 | A kind of low pressure signalling means |
| CN106855444B (en) * | 2016-12-02 | 2019-06-28 | 武汉航空仪表有限责任公司 | A kind of low pressure signalling means |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105090574B (en) | 2018-02-23 |
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