CN2063686U - Magnetic control differential pressure switch - Google Patents
Magnetic control differential pressure switch Download PDFInfo
- Publication number
- CN2063686U CN2063686U CN 90210225 CN90210225U CN2063686U CN 2063686 U CN2063686 U CN 2063686U CN 90210225 CN90210225 CN 90210225 CN 90210225 U CN90210225 U CN 90210225U CN 2063686 U CN2063686 U CN 2063686U
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- utility
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- differential pressure
- housing
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Abstract
The utility model provides an improved magnetic control differential pressure switch. The key point of the structure is that a sealed casing is made of permeability magnetic material, and a permanent magnet is fixed on a glue diaphragm on one side of the positive pressure cavity. A reed switch is fixed on the casing on one side of the positive pressure cavity. Compared with the existing similar products, the utility model has the advantages of simple structure, less parts, low cost, and easy construction. The utility model can be applied to the fire-fighting protection device of an industrial boiler and the equipment controlling pressure in chemical, petroleum and coal industry.
Description
The utility model belongs to a kind of differential pressure switch, particularly a kind of industrial boiler safe operation, magnetic control differential pressure switch of realization flame failure protection of being used for.
Industrial boiler causes combustion instability easily under the changeable situation of fuel coal, and produces deflagration phenomenon, so that cause the damage in boilers accident, need install the boiler extinguishment protective device additional for addressing this problem, to guarantee the normal operation of boiler.Key original paper--differential pressure switch in this device receives the boiler working state signal, passes to the boiler extinguishment protective device then and carries out operate as normal.Present U.S. 1640-10 type product; its structure mainly is made up of pressure spring, glue film, push rod and electric switch contact chip, and during work, the glue film center promotes push rod; push rod passes housing and promotes the electric switch contact chip again, makes its electrical signal conversion pass to the boiler extinguishment protective device.The subject matter that it exists is that the push rod diameter has only φ 0.75mm, and difficulty of processing is big, and push rod passes housing, sealing be difficult for to guarantee, service time, the length phenomenon that can leak air can cause controlled pressure inaccurate, the electric switch contact chip can produce spark in transfer process simultaneously, is unfavorable for safety in production.Part is more, and cost is higher.
The purpose of this utility model is at the problems referred to above, and a kind of improved differential pressure switch is provided, and it has simple in structure, part is less, is easy to construction, good airproof performance, advantages such as the fax sensing unit does not produce electric spark, and serviceability and fail safe all are better than existing product, and cost is lower.
The purpose of this utility model is achieved in that its structure comprises the housing of the sealing made from non-magnet material, and the glue film that is assembled in the housing is divided into malleation chamber and negative pressure cavity with the housing inner chamber, and two chambeies are communicated with the gas access respectively.Be assembled with pressure spring in negative pressure cavity, pressure spring withstands on the glue film central part.Improved technical essential is: one side is fixed with permanent magnet in the malleation chamber of glue film, is fixed with tongue tube on the housing of malleation chamber one side.
The utility model has the advantages that: simple in structure, part is few, and construction is easy, and cost is lower, and serviceability, sealing and fail safe all are better than existing product.
Below in conjunction with accompanying drawing the utility model embodiment is further described:
Fig. 1 is the utility model structural representation.
Fig. 2 is an another kind of structural representation of the present utility model.
Shown in the figure: 1 pressure spring, 2 glue films, 3 housings, 4 intermediate plates, 5 connectors, 6 permanent magnets, 7 seal covers, 8 tongue tubes, 9 malleation chambeies, 10 malleation chambeies inlet, 11 negative pressure cavities inlet, 12 negative pressure cavities, 13 regulator bolts.
See Fig. 1, the housing 3 of sealing is made by non-magnet material, glue film 2 is divided into malleation chamber 9 and negative pressure cavity 11 with housing 3 inner chambers, the central part of glue film 2 is fixed with intermediate plate 4, connector 5 riveted and fixed are on it, be fixed with permanent magnet 6 on the connector 5, on the housing 3 of malleation chamber one side, be fixed with tongue tube 8.
See Fig. 2, housing 3 of the present utility model can be taked second kind of structure: on the housing 3 that is positioned at malleation chamber one side opening is arranged, fixedly be assembled with the seal cover 7 that non-magnet material is made on opening, tongue tube 8 fixedly is assembled on the seal cover 7, and other structure as previously mentioned.
Operation principle: the definite value of positive negative pressure is adjusted by pressure spring 1 and is provided; during operate as normal; pressure spring 1 jack-up glue film 2 makes permanent magnet 6 contact housing 3(or seal covers 7), the normal opened contact of tongue tube 8 is by permanent magnet 6 adhesives, when the pressure in malleation chamber 9 increases and negative pressure cavity 12 pressure when reducing; the differential pressure that produces promotes glue film and moves down; permanent magnet 6 also moves down thereupon, and this moment, tongue tube 8 interior normal opened contacts disconnected, and normally closed point is connected; the output signal of telecommunication passes to the boiler extinguishment protective device.
The utility model also can be applicable to chemical industry, oil, coal etc. to be needed on the equipment of controlled pressure, and also has security reliability on inflammable and explosive field boundary ground.
Claims (2)
1, a kind of magnetic control differential pressure switch, the housing that comprises sealing, glue film is divided into malleation chamber and negative pressure cavity with the housing inner chamber, and pressure spring is housed in the negative pressure cavity, it is characterized in that: one side is fixed with permanent magnet in the malleation chamber of glue film, is fixed with tongue tube on the housing of malleation chamber one side.
2, differential pressure switch according to claim 1 is characterized in that: being positioned on the housing of malleation chamber one side has opening, fixedly is assembled with seal cover on the opening, and tongue tube fixedly is assembled on the seal cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90210225 CN2063686U (en) | 1990-03-10 | 1990-03-10 | Magnetic control differential pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90210225 CN2063686U (en) | 1990-03-10 | 1990-03-10 | Magnetic control differential pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2063686U true CN2063686U (en) | 1990-10-10 |
Family
ID=4890150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90210225 Withdrawn CN2063686U (en) | 1990-03-10 | 1990-03-10 | Magnetic control differential pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2063686U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103646821A (en) * | 2013-12-04 | 2014-03-19 | 佛山市顺德区奇林电气有限公司 | Magnetic reed pipe conductive wind-pressure switch |
| CN103700540A (en) * | 2013-12-12 | 2014-04-02 | 佟勇华 | Water flow inductive switch |
| CN104242891A (en) * | 2014-09-26 | 2014-12-24 | 思达文电器（深圳）有限公司 | Electronic wind pressure switch and gas appliance |
-
1990
- 1990-03-10 CN CN 90210225 patent/CN2063686U/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103646821A (en) * | 2013-12-04 | 2014-03-19 | 佛山市顺德区奇林电气有限公司 | Magnetic reed pipe conductive wind-pressure switch |
| CN103646821B (en) * | 2013-12-04 | 2016-08-17 | 佛山市顺德区奇林电气有限公司 | A kind of blast switch of magnetic tongue tube conduction |
| CN103700540A (en) * | 2013-12-12 | 2014-04-02 | 佟勇华 | Water flow inductive switch |
| CN103700540B (en) * | 2013-12-12 | 2016-06-22 | 佟勇华 | Current inductive switch |
| CN104242891A (en) * | 2014-09-26 | 2014-12-24 | 思达文电器（深圳）有限公司 | Electronic wind pressure switch and gas appliance |
| CN104242891B (en) * | 2014-09-26 | 2017-12-01 | 思达文电器（深圳）有限公司 | Electronics blast switch and gas utensil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |