CN204083284U - A kind of switch valve dust cover device of gas ratio valve - Google Patents
A kind of switch valve dust cover device of gas ratio valve Download PDFInfo
- Publication number
- CN204083284U CN204083284U CN201420547726.2U CN201420547726U CN204083284U CN 204083284 U CN204083284 U CN 204083284U CN 201420547726 U CN201420547726 U CN 201420547726U CN 204083284 U CN204083284 U CN 204083284U
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- China
- Prior art keywords
- dust
- valve
- switch valve
- spool
- proof cover
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Abstract
The utility model provides a kind of switch valve dust cover device of gas ratio valve, belong to the technical field of gas ratio valve, solve the problem that the spool of switch valve is easily stuck, it is characterized in that: between described copper sheathing A and described plugging plate A, be provided with dust-proof cover A, one end of described dust-proof cover A is fixed between described spring seat A and described plugging plate A, the other end of described dust-proof cover A is fixed on dust guard holder A, and described dust guard holder A is positioned at the joint of described copper sheathing A and described spool; Switch valve B is also provided with between described Proportional valve A and described Proportional valve.The utility model apparatus structure is simple and be easy to industrialization promotion, effectively prevents metallic dust or impurity etc. in combustion gas from entering spool or valve body gap, there will not be the stuck phenomenon because of spool adhesion metal powder or impurity blocking; Dust-proof cover is that sulfurized nitrile rubber makes bellow-shaped simultaneously, has stretchability, can not affect spring return function and the switching manipulation of switch valve.
Description
Technical field
The utility model belongs to the technical field of gas ratio valve, especially a kind of switch valve dust cover device of gas ratio valve.
Background technique
Gas ratio valve is the core component be used on fast constant temperature formula water heater, its major function is the supply meeting the large a small amount of of combustion gas according to the instruction of set water temperature, and overcome because air pressure height changes and supply the instability brought to flow, namely the function of voltage stabilizing and constant current is had, simultaneously due to Proportional valve specific position in thermostatic type water heater, be therefore functionally endowed the controlling functions that it has combustion gas break-make.
A large amount of impurity is there is owing to retaining to have in a large amount of metallic dusts or combustion gas in fuel gas pipeline, when switch operationally its magnetic core band be magnetic, metallic dust in pipeline or impurity enter switch valve passage with combustion gas and are adsorbed on magnetic core or are attached in gap, in this case, cannot return under the action of the spring when accumulation causes magnetic core and copper sheathing gap to block the switch valve power-off made day by day, close valve (as Fig. 1), thus cause part water heater, because the break-make of rock gas can not get effectively controlling, " dry combustion method " occurs, the catastrophic accident such as even on fire, existing market Small And Medium Capacity water heater is well received, but because the inside small space structure of small capacity miniaturization brings many problems also to the utilization of Proportional valve, its be mainly manifested in that the volume restriction due to the assembly of comparative example valve makes its switch valve and a Proportional valve (as Fig. 1) can only be installed, but control the break-make of gas circuit with single switch valve and allow the tightness of combustion gas can not get effective guarantee because of chance failures such as switch valve are stuck.
Model utility content
The purpose of this utility model is the problems referred to above existed for existing technology, provides a kind of switch valve dust cover device of gas ratio valve, and the utility model solves the easily stuck problem of the spool of switch valve, the tightness of effective guarantee combustion gas.
For this reason, the technical solution that the utility model is taked is:
A kind of switch valve dust cover device of gas ratio valve, comprise switch valve A, Proportional valve, Proportional valve valve seat, combustion gas gas circuit, described Proportional valve A is made up of copper sheathing A, spool A, spring seat A, plugging plate A, dust-proof cover A is provided with between described copper sheathing A and described plugging plate A, one end of described dust-proof cover A is fixed between described spring seat A and described plugging plate A, the other end of described dust-proof cover A is fixed on dust guard holder A, and described dust guard holder A is positioned at the joint of described copper sheathing A and described spool; Switch valve B is also provided with between described Proportional valve A and described Proportional valve.
As preferred further, described Proportional valve A is consistent with the structure of described switch valve B.
As preferred further, is provided with hole in the middle of described dust guard holder A, described spool A root is positioned at described hole, and the spring of described spool A is fixed on described hole along upper.
As preferred further, described spring seat A is fixed on described spool A, and described plugging plate A is threaded connection on described spool A, and described spring seat A and described plugging plate A forms clamping structure.
As preferred further, described dust-proof cover A is that sulfurized nitrile rubber is made.
As preferred further, described dust-proof cover A is bellow-shaped.
As preferred further, the thickness of described dust-proof cover A is 0.2mm ~ 0.4mm.
The beneficial effect of technique scheme is:
The utility model is provided with dust-proof cover A between described copper sheathing A and described plugging plate A, the space such as spool or gap and combustion gas gas circuit can be isolated, metallic dust or impurity etc. in combustion gas is prevented to enter spool or valve body gap, there will not be the stuck phenomenon because of spool adhesion metal powder or impurity blocking, and the dry combustion method phenomenon therefore brought or fire equivalent risk; The utility model adopts two switch valves, and when switch valve generation stuck phenomenon, the tightness of effective guarantee combustion gas gas circuit, achieves bubble-tight dual fail-safe, stops the problems such as the dry combustion method brought because of stuck phenomenon further; Dust-proof cover of the present utility model is that sulfurized nitrile rubber makes bellow-shaped, has stretchability, can not affect spring return function and the switching manipulation of switch valve; The utility model structure is simple and be convenient to industrialization promotion.
Accompanying drawing explanation
Fig. 1 is the structural representation of the switch valve of gas ratio valve in prior art.
Fig. 2 is the structural representation of the switch valve dust cover device of gas ratio valve of the present utility model.
In figure: 1, switch valve A; 2, switch valve B; 3, Proportional valve; 4, Proportional valve valve seat; 5, combustion gas gas circuit; 101, copper sheathing A; 102, spool A; 103, dust-proof cover A; 104, spring seat A; 105, dust guard holder A; 106, plugging plate A; 201, copper sheathing B; 202, spool B; 203, dust-proof cover B; 204, spring seat B; 205, dust guard holder B; 206, plugging plate B; 401, gas inlet; 402, gas outlet; 403, filter screen; 404, valve port A; 405, valve port B.
Embodiment
For making feature of the present utility model and advantage clearly, be described below in conjunction with specific embodiment.
As depicted in figs. 1 and 2, a kind of switch valve dust cover device of gas ratio valve, comprise switch valve A1, Proportional valve 3, Proportional valve valve seat 4, combustion gas gas circuit 5, described Proportional valve A1 is by copper sheathing A101, spool A102, spring seat A104, plugging plate A106 is formed, dust-proof cover A103 is provided with between described copper sheathing A101 and described plugging plate A106, one end of described dust-proof cover A103 is fixed between described spring seat A104 and described plugging plate A106, the other end of described dust-proof cover A103 is fixed on dust guard holder A105, described dust guard holder A105 is positioned at the joint of described copper sheathing A101 and described spool, switch valve B2 is also provided with between described Proportional valve A1 and described Proportional valve 3.
In the present embodiment, described Proportional valve A1 is consistent with the structure of described switch valve B2, and when switch valve generation stuck phenomenon, the tightness of effective guarantee combustion gas gas circuit 5, achieves bubble-tight dual fail-safe, stops the problems such as the dry combustion method brought because of stuck phenomenon further.
In the present embodiment, be provided with hole in the middle of described dust guard holder A105, described spool A102 root is positioned at described hole, and the spring of described spool A102 is fixed on described hole along upper, makes the easy return of spool, can better fix dust-proof cover and sealing simultaneously.
In the present embodiment, described spring seat A104 is fixed on described spool A102, and described plugging plate A106 is threaded connection on described spool A102, and described spring seat A104 and described plugging plate A106 forms clamping structure, better can clamp dust-proof cover, and assembling is simple.
In the present embodiment, described dust-proof cover A103 is that sulfurized nitrile rubber is made, described dust-proof cover A103 is bellow-shaped, the thickness of described dust-proof cover A103 is 0.2mm ~ 0.4mm, the gap of spool and copper sheathing thereof and combustion gas gas circuit can isolate by dust-proof cover, prevent the metallic dust in combustion gas or impurity to be attached in spool and valve body gap, there will not be the stuck phenomenon because of spool adhesion metal powder or impurity blocking; Dust-proof cover is bellow-shaped, has stretchability, can not affect spring return function and the switching manipulation of switch valve.
During use, dust guard holder A105 is fixed on copper sheathing A101, fixing spring, fixing dust-proof cover A103 root, installs plugging plate A106 and fixes dust-proof cover end, then switch valve A is fixed on Proportional valve valve seat 4, complete assembling, switch valve B2 is consistent with switch valve A1 structure, and mounting type is also consistent, set up dust-proof cover, achieve the isolation to combustion gas metallic dust or impurity.
In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop in protection domain of the present utility model.
Claims (7)
1. the switch valve dust cover device of a gas ratio valve, comprise switch valve A, Proportional valve, Proportional valve valve seat, combustion gas gas circuit, described Proportional valve A is made up of copper sheathing A, spool A, spring seat A, plugging plate A, it is characterized in that: between described copper sheathing A and described plugging plate A, be provided with dust-proof cover A, one end of described dust-proof cover A is fixed between described spring seat A and described plugging plate A, the other end of described dust-proof cover A is fixed on dust guard holder A, and described dust guard holder A is positioned at the joint of described copper sheathing A and described spool; Switch valve B is also provided with between described Proportional valve A and described Proportional valve.
2. the switch valve dust cover device of gas ratio valve according to claim 1, is characterized in that: described Proportional valve A is consistent with the structure of described switch valve B.
3. the switch valve dust cover device of gas ratio valve according to claim 1, is characterized in that: be provided with hole in the middle of described dust guard holder A, described spool A root is positioned at described hole, and the spring of described spool A is fixed on described hole along upper.
4. the switch valve dust cover device of gas ratio valve according to claim 1, it is characterized in that: described spring seat A is fixed on described spool A, described plugging plate A is threaded connection on described spool A, and described spring seat A and described plugging plate A forms clamping structure.
5. the switch valve dust cover device of gas ratio valve according to claim 1, is characterized in that: described dust-proof cover A is that sulfurized nitrile rubber is made.
6. the switch valve dust cover device of gas ratio valve according to claim 1, is characterized in that: described dust-proof cover A is bellow-shaped.
7. the switch valve dust cover device of gas ratio valve according to claim 1, is characterized in that: the thickness of described dust-proof cover A is 0.2mm ~ 0.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420547726.2U CN204083284U (en) | 2014-09-23 | 2014-09-23 | A kind of switch valve dust cover device of gas ratio valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420547726.2U CN204083284U (en) | 2014-09-23 | 2014-09-23 | A kind of switch valve dust cover device of gas ratio valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204083284U true CN204083284U (en) | 2015-01-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420547726.2U Expired - Fee Related CN204083284U (en) | 2014-09-23 | 2014-09-23 | A kind of switch valve dust cover device of gas ratio valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204083284U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105011973A (en) * | 2015-05-11 | 2015-11-04 | 桐庐精锐医疗器械有限公司 | Constant-temperature variable-flow gas insufflator |
-
2014
- 2014-09-23 CN CN201420547726.2U patent/CN204083284U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105011973A (en) * | 2015-05-11 | 2015-11-04 | 桐庐精锐医疗器械有限公司 | Constant-temperature variable-flow gas insufflator |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20200923 |