CN203384437U - Protection device of fuel gas valve - Google Patents
Protection device of fuel gas valve Download PDFInfo
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- CN203384437U CN203384437U CN201320414723.7U CN201320414723U CN203384437U CN 203384437 U CN203384437 U CN 203384437U CN 201320414723 U CN201320414723 U CN 201320414723U CN 203384437 U CN203384437 U CN 203384437U
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- spring
- axle sleeve
- protective gear
- seal
- gasket
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Abstract
The utility model provides a protection device of a fuel gas valve, belongs to the technical field of machinery, and solves the problems of lower safety performance and the like of a conventional fuel gas valve. According to the protection device of the fuel gas valve, the fuel gas valve comprises a valve body provided with a gas inlet pipe and a gas outlet pipe, a valve rod and a valve core located in the valve body, wherein one end of the valve rod is connected with the valve core, and the other end penetrates out of the valve body; and the protection device is fixed in the valve body and comprises a shaft sleeve, a sealing shaft, a sealing gasket and a spring, the shaft sleeve is fixed in the valve body, the sealing shaft is arranged in the axial direction of the shaft sleeve and glidingly penetrates through the shaft sleeve, the sealing gasket is arranged at one end of the sealing shaft, the sealing shaft is sleeved with the spring, one end of the spring is butted against the sealing gasket, the other end of the spring is butted against the shaft sleeve, and the sealing gasket and the shaft sleeve can form sealing to stop fuel gas circulation when the spring is compressed. The protection device of the fuel gas valve has the advantages of simple structure, good safety performance, long service life and the like.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of protective gear, particularly a kind of protective gear of gas valve.
Background technique
At present, combustion gas acts as a fuel, and has been deep into huge numbers of families, particularly big and medium-sized cities, and pipeline gas has been installed to kitchen, and wherein gas valve is very important parts, by the switching of controlling gas valve, opens or block pipeline gas.When using pipeline gas, particularly to cook while cooking, gaseous-pressure may make positive utensil extinguish while surpassing certain pressure, and at this moment people just can't learn because pipeline gas air pressure is too high that cause or because the problem of burner own causes.
In order to overcome the above problems, people's model utility of all kindsly there is the gas valve that detects the combustion gas air pressure function, for example the Chinese patent literature data discloses the gas valve [application number: 200810120670.1 with pressure-detecting device; Notice of authorization number: CN101354097B], it comprises valve body, the valve rod with suction tude and steam outlet pipe and the spool that is positioned at valve body, one end and the spool of valve rod link, the other end passes valve body, have pressure tap on suction tude, be provided with pressure-detecting device in the suction tude outside, suction tude is provided with and is axially fixed on suction tude and the valve pocket that can circumferentially rotate, form sealing between valve pocket and suction tude, move into when tracheae circumferentially rotates the annular groove that can make pressure tap be connected with pressure-detecting device all the time when valve pocket being provided with between valve pocket and suction tude.
The gas valve of this kind of structure, valve pocket is be axially fixed on suction tude and can circumferentially rotate, no matter how this gas pipeline is laid, and only needs to rotate valve pocket and just can make pressure valve in best test position, easy to detect.But the gas valve of this kind of structure in use; when gas flow is crossed gas valve; when the flow of combustion gas, pressure surpass normal pressure; the perhaps situation such as the damaged leakage of sebific duct; gas valve due to this kind of structure; itself does not have safety protection device, can't alleviate in time and even discharge dangerous situation, and Safety performance is lower.
Summary of the invention
The purpose of this utility model is for the above-mentioned problems in the prior art, and a kind of protective gear of simple in structure, gas valve that Safety performance is good is provided.
The purpose of this utility model can realize by following technical proposal: a kind of protective gear of gas valve, gas valve comprises the valve body with suction tude and steam outlet pipe, valve rod and the spool that is positioned at valve body, one end of described valve rod is connected with spool, the other end passes valve body, it is characterized in that, described protective gear is fixed in valve body, described protective gear comprises axle sleeve, seal shaft, gasket seal and spring, described axle sleeve is fixed in valve body, described seal shaft is located in axle sleeve along axial setting and the slip of axle sleeve, one end of described seal shaft is provided with described gasket seal, described spring housing is on seal shaft, one end of described spring is resisted against on gasket seal, the other end is resisted against on axle sleeve, when described spring is compressed, above-mentioned gasket seal can form sealing blocking-up gas circulation with axle sleeve.
Itself has elastic force spring, and the value of elastic of spring is certain, and the flow of combustion gas, pressure, when normal state, have the passage for gas circulation between the effect lower seal pad of spring force and axle sleeve, and combustion gas is normally circulated; Flow once combustion gas surpasses normal flow rate or paranormal pressure, produce the thrust that is greater than spring force during fuel gas flow, combustion gas promotes the gasket seal Compress Spring, seal shaft moves axially along axle sleeve, makes gasket seal abut against a side of axle sleeve, between gasket seal and axle sleeve, forms airtight, the circulation of blocking-up combustion gas, combustion gas can not revealed, and gas accidents can not occur, and Safety performance is good; While by spring, gasket seal, seal shaft and axle sleeve, just realizing the super stream of combustion gas, superpressure, the purpose of blocking-up pipeline gas, simple in structure.
In the protective gear of above-mentioned a kind of gas valve; described protective gear also comprises adjusting nut; described adjusting nut and seal shaft are connected by screw thread, and described adjusting nut is positioned at the outside of gasket seal, and described gasket seal and seal shaft are slidably connected.By precession or back-out adjusting nut, adjust the decrement of spring, thereby change the elastic force of spring, make the value of elastic of spring reach default value, regulate simple.
In the protective gear of above-mentioned a kind of gas valve, described gasket seal comprises hard gasket and soft sealing gasket, and described hard gasket and soft sealing gasket are connected by stickup.Can excessive deformation when hard gasket makes soft sealing gasket move left and right along seal shaft, play the effect of support, soft sealing gasket is rubber gasket, produces certain deformation during sealing, good sealing effect.
In the protective gear of above-mentioned a kind of gas valve, the edge of described soft sealing gasket sidepiece has the convex annular ball, has the annular slope be complementary with the convex annular ball on described axle sleeve.When gasket seal and axle sleeve formation sealing, the convex annular ball is embedded on annular slope and forms sealing, increases sealing area, good sealing effect.
In the protective gear of above-mentioned a kind of gas valve; the center of described soft sealing gasket sidepiece has annular projection; the external diameter of described annular projection and the internal diameter of spring are complementary, and described spring housing is in the outside of annular projection, and an end of spring is resisted against on soft sealing gasket.The annular projection plays the effect of retaining spring, makes the spring can double swerve, the spring good stability, and it is constant that the spring force value just keeps, and the spring force precision is high, makes the protection of this protective gear effective.
In the protective gear of above-mentioned a kind of gas valve, the center of described axle sleeve is fixed with guide cylinder, and described seal shaft is located in guide cylinder, and the other end of described seal shaft has annular shoulder block.Guide cylinder play the guiding role, the internal diameter of guide cylinder and the external diameter of seal shaft are complementary, while making seal shaft along the axial left and right translation of axle sleeve, can not rock, thereby make spring keep stable, the spring force precision is high, the annular shoulder block can not come off because of the elastic force of spring seal shaft in guide cylinder, simple in structure.
In the protective gear of above-mentioned a kind of gas valve, described guide cylinder is connected by fastener rings mutually with axle sleeve.Join strength is high.
In the protective gear of above-mentioned a kind of gas valve, the external diameter of described guide cylinder and the internal diameter of spring are complementary, and described spring housing is located at the outside of guide cylinder, and the other end of spring is resisted against on fastener rings.Guide cylinder plays the effect of retaining spring, makes the spring can double swerve, the spring good stability, and it is constant that the spring force value just keeps, and the spring force precision is high, makes the protection of this protective gear effective.
In the protective gear of above-mentioned a kind of gas valve; one end of described axle sleeve is fixed with the air inlet cover by screw thread; described air inlet puts has inlet hole, and the cross-section area of described inlet hole is slightly less than the cross-section area of gasket seal, and described adjusting nut, gasket seal all are positioned at the air inlet cover.Inlet hole and gasket seal are over against setting, and air inlet cover steering flow flows into and all focuses on gasket seal from inlet hole, makes the gasket seal front bear flow velocity and the pressure of combustion gas, and the thrust of generation is passed to spring accurately.
In the protective gear of above-mentioned a kind of gas valve, described protective gear is fixed in spool, between described axle sleeve and spool, has seal ring., when closing, there is not potential safety hazard in gas valve, and now protective gear is positioned at spool, does not bear the impact of the out-of-date generation of gas flow, reduces the operating time of this protective gear, long service life; When gas valve is opened, this protective gear is simultaneously in running order, effectively avoids because of gas accidentses such as overpressure of gas, super stream and the damaged leakages of sebific duct; gap between seal ring sealing axle sleeve and spool; combustion gas can be from this gap seepage, good sealing effect, and the pressure sensitive precision is high.
In the protective gear of above-mentioned a kind of gas valve; described axle sleeve and spool drive fit are connected; have annular groove one on the madial wall of described spool, have annular groove two on the outer side wall of described axle sleeve, described seal ring is positioned at annular groove one and annular groove two.Axle sleeve and spool drive fit are connected, connect simple, annular groove one and annular groove two provide the mounting point of seal ring, seal ring is positioned at annular groove one and annular groove two, and the gap between sealing axle sleeve and spool can not oozed out combustion gas between axle sleeve and spool, good sealing effect, and seal ring makes axle sleeve all be positioned at this position, place of spool when location, during batch production, the high conformity of product.
The protective gear of the gas valve that compared with prior art, the utility model provides has the following advantages:
1, the protective gear of this gas valve is fixed in spool; when gas valve is closed; do not exist combustion gas to surpass the problems such as stream, hypervelocity; this protective gear is in off working state; when gas valve is opened, this protective gear plays a protective role in protective position, this kind of structure; effectively reduce the operating time of this protective gear, long service life.
2, the protective gear of this gas valve is adjusted the decrement of spring by adjusting nut, makes the elastic force of spring meet predefined value, regulates simple.
3, the protective gear spring housing of this gas valve is in the outside of seal shaft; one end of spring is enclosed within the outside of annular projection; the other end is enclosed within the outside of guide cylinder; the external diameter of annular projection and guide cylinder all is complementary with the internal diameter of spring, all spring is played the effect of location, and the phenomenon of skew can not occur spring; the spring good stability; the elastic constant of spring, the elastic force precision is high, and the protection of this protective gear is effective.
4, the protective gear of this gas valve is provided with the air inlet cover, and air inlet cover steering flow focuses on gasket seal, and the thrust that fuel gas flow produces is born in the gasket seal front, accurately the thrust of combustion gas is passed to spring, and transmitting accuracy is high.
5, the convex annular ball on the soft sealing gasket of the protective gear of this gas valve week outward side edge and the annular slope on the circumferential inner side edge of axle sleeve edge are complementary, and during sealing, the convex annular ball is close to and is combined on annular slope, good sealing effect.
The accompanying drawing explanation
Fig. 1 is this sectional view of overall structure with the protective gear gas valve.
Sectional view when Fig. 2 is the protective gear normal operating condition of this gas valve.
Sectional view when Fig. 3 is the super stream of the protective gear of this gas valve, superpressure cut-off.
Fig. 4 is the side view of the protective gear axle sleeve of this gas valve.
In figure, 1, valve body; 1a, suction tude; 1b, steam outlet pipe; 2, valve rod; 3, spool; 4, axle sleeve; 4a, annular slope; 5, seal shaft; 5a, annular shoulder block; 6, gasket seal; 6a, hard gasket; 6b, soft sealing gasket; 6b1, convex annular ball; 6b2, annular projection; 7, spring; 8, seal ring; 9, adjusting nut; 10, guide cylinder; 11, fastener rings; 12, air inlet cover; 12a, inlet hole.
Embodiment
Be below specific embodiment of the utility model by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
As shown in Figure 1, this gas valve comprises valve body 1, the valve rod 2 with suction tude 1a and steam outlet pipe 1b and the spool 3 that is positioned at valve body 1, one end of valve rod 2 is connected with spool 3, the other end passes outside valve body 1 and is connected with handle, there is pressure-detecting device on steam outlet pipe 1b, and this pressure-detecting device can lay out tracheae 1b rotation.This protective gear is fixed in spool 3, comprises axle sleeve 4, seal shaft 5, gasket seal 6, spring 7, adjusting nut 9, seal ring 8 and air inlet cover 12.
The internal diameter of the external diameter of axle sleeve 4 and spool 3 is complementary, axle sleeve 4 is by being tightly fixed in spool 3, there is annular groove one on the madial wall of spool 3, there is annular groove two on the outer side wall of axle sleeve 4, seal ring 8 is arranged in annular groove one and annular groove two, the gap between seal shaft 5 covers 4 and spool 3, and the installation of axle sleeve 4 is played to the effect of location, in batch production, make each axle sleeve 4 be installed in the same position in spool 3.As shown in Figure 4, the center of axle sleeve 4 is fixed with guide cylinder 10 by fastener rings 11, the interior slip of guide cylinder 10 is equipped with seal shaft 5, seal shaft 5 is along the axial setting of guide cylinder 10, one end of seal shaft 5 is fixed with adjusting nut 9 by screw thread, the end that seal shaft 5 is positioned at the other end of guide cylinder 10 has annular shoulder block 5a, and adjusting nut 9 and annular shoulder block 5a can not come off seal shaft 5 in guide cylinder 10.The be slidably located in outside of seal shaft 5 of gasket seal 6, comprise hard gasket 6a and soft sealing gasket 6b, hard gasket 6a is made by metallic material, and soft sealing gasket 6b is made by rubber material, and both are connected by stickup, hard gasket 6a and adjusting nut 9 fit.The edge of soft sealing gasket 6b sidepiece has convex annular ball 6b1, has to the inside the annular slope 4a be complementary with convex annular ball 6b1 the week of axle sleeve 4.The center of soft sealing gasket 6b sidepiece has annular projection 6b2, the external diameter of annular projection 6b2 and the internal diameter of spring 7 are complementary, the external diameter of guide cylinder 10 also is complementary with the internal diameter of spring 7, spring 7 is set on seal shaft 5, one end of spring 7 is enclosed within the outside of annular projection 6b2, and be resisted against on soft sealing gasket 6b, the other end is enclosed within the outside of guide cylinder 10, and be resisted against on fastener rings 11, annular projection 6b2 and guide cylinder 10 all play the effect of location to spring 7, spring 7 can double swerve, the good stability of spring 7, elastic constant.One end of axle sleeve 4 is fixed with air inlet cover 12 by screw thread, there is inlet hole 12a on air inlet cover 12, when gas valve is opened, air inlet cover 12 is near the suction tude 1a of valve body 1, the cross-section area of inlet hole 12a is slightly less than the rank street area of gasket seal 6, and adjusting nut 9 and gasket seal 6 all are positioned at air inlet cover 12.
As shown in Figure 2; this kind of state is the state of this protective gear when normal the use; combustion gas enters in spool 3 from suction tude 1a; overlapping 12 guiding function by air inlet all concentrates and impacts gasket seal 6; fuel gas flow is impacted the elastic force that the thrust produced is less than or equals spring 7; state in opening between gasket seal 6 and axle sleeve 4, have the passage passed through for combustion gas between gasket seal 6 and axle sleeve 4.
As shown in Figure 3; this kind of state is the state of this protective gear in the protection cut-off; combustion gas is advanced as in spool 3 from suction tude 1a; overlapping 12 guiding function by air inlet all concentrates and impacts gasket seal 6; due to combustion gas in situations such as super stream, superpressures; the thrust that combustion gas impact gasket seal 6 produces is greater than the elastic force of spring 7; spring 7 is compressed; the interior formation of annular slope 4a that the convex annular ball 6b1 of soft sealing gasket 6b is resisted against axle sleeve 4 seals; the circulation of combustion gas in the cut-off gas valve; combustion gas can not revealed, and effectively avoids the generation of gas accidents.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although this paper has more been used the terms such as valve body 1, suction tude 1a, steam outlet pipe 1b, valve rod 2, spool 3, axle sleeve 4, annular slope 4a, seal shaft 5, annular shoulder block 5a, gasket seal 6, hard gasket 6a, soft sealing gasket 6b, convex annular ball 6b1, annular projection 6b2, spring 7, seal ring 8, adjusting nut 9, guide cylinder 10, fastener rings 11, air inlet cover 12, inlet hole 12a, do not get rid of the possibility of using other term.Using these terms is only in order to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.
Claims (10)
1. the protective gear of a gas valve, gas valve comprises the valve body (1) of have suction tude (1a) and steam outlet pipe (1b), valve rod (2) and be positioned at the spool (3) of valve body (1), one end of described valve rod (2) is connected with spool (3), the other end passes valve body (1), it is characterized in that, described protective gear is fixed in valve body (1), described protective gear comprises axle sleeve (4), seal shaft (5), gasket seal (6) and spring (7), described axle sleeve (4) is fixed in valve body (1), described seal shaft (5) is located in axle sleeve (4) along axial setting and the slip of axle sleeve (4), one end of described seal shaft (5) is provided with described gasket seal (6), described spring (7) is enclosed within on seal shaft (5), one end of described spring (7) is resisted against on gasket seal (6), the other end is resisted against on axle sleeve (4), when described spring (7) is compressed, above-mentioned gasket seal (6) can form sealing blocking-up gas circulation with axle sleeve (4).
2. the protective gear of a kind of gas valve according to claim 1; it is characterized in that; described protective gear also comprises adjusting nut (9); described adjusting nut (9) is connected by screw thread with seal shaft (5); and described adjusting nut (9) is positioned at the outside of gasket seal (6), described gasket seal (6) is slidably connected with seal shaft (5).
3. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; described gasket seal (6) comprises hard gasket (6a) and soft sealing gasket (6b), and described hard gasket (6a) and soft sealing gasket (6b) are connected by stickup.
4. the protective gear of a kind of gas valve according to claim 3; it is characterized in that; the edge of described soft sealing gasket (6b) sidepiece has convex annular ball (6b1), has the annular slope (4a) be complementary with convex annular ball (6b1) on described axle sleeve (4).
5. the protective gear of a kind of gas valve according to claim 3; it is characterized in that; the center of described soft sealing gasket (6b) sidepiece has annular projection (6b2); the internal diameter of the external diameter of described annular projection (6b2) and spring (7) is complementary; described spring (7) is enclosed within the outside of annular projection (6b2), and an end of spring (7) is resisted against on soft sealing gasket (6b).
6. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; the center of described axle sleeve (4) is fixed with guide cylinder (10), and described seal shaft (5) is located in guide cylinder (10), and the other end of described seal shaft (5) has annular shoulder block (5a).
7. the protective gear of a kind of gas valve according to claim 6, is characterized in that, described guide cylinder (10) is connected by fastener rings (11) mutually with axle sleeve (4).
8. the protective gear of a kind of gas valve according to claim 7; it is characterized in that; the internal diameter of the external diameter of described guide cylinder (10) and spring (7) is complementary, and described spring (7) is set in the outside of guide cylinder (10), and the other end of spring (7) is resisted against on fastener rings (11).
9. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; one end of described axle sleeve (4) is fixed with air inlet cover (12) by screw thread; there is inlet hole (12a) on described air inlet cover (12); the cross-section area of described inlet hole (12a) is slightly less than the cross-section area of gasket seal (6), and described adjusting nut (9), gasket seal (6) all are positioned at air inlet cover (12).
10. the protective gear of a kind of gas valve according to claim 1 and 2; it is characterized in that; described protective gear is fixed in spool (3); there is seal ring (8) between described axle sleeve (4) and spool (3); described axle sleeve (4) is connected with spool (3) drive fit; have annular groove one on the madial wall of described spool (3), on the outer side wall of described axle sleeve (4), have annular groove two, described seal ring (8) is positioned at annular groove one and annular groove two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320414723.7U CN203384437U (en) | 2013-07-10 | 2013-07-10 | Protection device of fuel gas valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320414723.7U CN203384437U (en) | 2013-07-10 | 2013-07-10 | Protection device of fuel gas valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203384437U true CN203384437U (en) | 2014-01-08 |
Family
ID=49872929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320414723.7U Withdrawn - After Issue CN203384437U (en) | 2013-07-10 | 2013-07-10 | Protection device of fuel gas valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203384437U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322257A (en) * | 2013-07-10 | 2013-09-25 | 玉环燃具实业有限公司 | Protection device of fuel gas valve |
-
2013
- 2013-07-10 CN CN201320414723.7U patent/CN203384437U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322257A (en) * | 2013-07-10 | 2013-09-25 | 玉环燃具实业有限公司 | Protection device of fuel gas valve |
| CN103322257B (en) * | 2013-07-10 | 2015-05-06 | 玉环燃具实业有限公司 | Protection device of fuel gas valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140108 Effective date of abandoning: 20150506 |
|
| RGAV | Abandon patent right to avoid regrant |