CN108962672A - A kind of compact pressure switch of explosion-proof type and its application method - Google Patents
A kind of compact pressure switch of explosion-proof type and its application method Download PDFInfo
- Publication number
- CN108962672A CN108962672A CN201811208087.6A CN201811208087A CN108962672A CN 108962672 A CN108962672 A CN 108962672A CN 201811208087 A CN201811208087 A CN 201811208087A CN 108962672 A CN108962672 A CN 108962672A
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- Prior art keywords
- shell
- explosion
- switch
- piston boit
- electrical connector
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 37
- 101100532451 Rattus norvegicus Slc22a17 gene Proteins 0.000 claims abstract description 39
- 238000007789 sealing Methods 0.000 claims description 14
- 230000001960 triggered effect Effects 0.000 claims description 6
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000004880 explosion Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000010892 electric spark Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- H01H35/26—Details
-
- 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
- H01H35/38—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by piston and cylinder
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/02—Bases, casings, or covers
- H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
- H01H9/042—Explosion-proof cases
Landscapes
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of compact pressure switch of explosion-proof type and its application methods, it is characterized by comprising shells, electrical connector and process adapter, shell is the internal cuboid for being equipped with cylindrical cavity, shell left end is connect with process adapter, on the right side of process adapter, enclosure interior is equipped with piston boit, axle sleeve is cased on the outside of piston boit, mandril is equipped on the right side of piston boit, gasket and spring are cased on the outside of mandril, shell right end grafting electrical connector is simultaneously located on the right side of the spring, rivet cover is equipped on the right side of electrical connector, it is fixedly connected with the casing by rivet, switch element is equipped in electrical connector, switch element connecting wire is simultaneously drawn from electrical connector right end, piston boit pushes mandril to move horizontally in shell and compressed and discharged to spring under pressure, mandril is pushed to compress bullet to the right when the pressure that piston boit is subject to reaches switching threshold Spring and closure switch element.The hydraulic or pneumatic system that the present invention is suitable for having flame proof requirement has compact-sized reasonable, safe and reliable advantage.
Description
Technical field
The present invention relates to industrial field of switches, in particular to the compact pressure switch of a kind of explosion-proof type and its application method.
Background technique
Pressure switch is widely used in the fields such as petroleum, chemical industry, metallurgy, electric power, water supply, can be according to the pressure of gas or liquid
Force parameter variation, output alarm or control signal, there is important purposes in industrial circle.Explosive gas atmosphere is used
Electrical equipment, be usually constructed with hydraulic and pneumatic system, since common pressure switch does not have a flameproof enclosure, explosive gas is met
Explosion can be generated when to electric spark, if the explosion is transmitted to entire explosive gas atmosphere, serious safe thing will be caused
Therefore therefore, it is necessary to design can the pressure in monitoring system there is the pressure switch of explosion prevention function again.And pressure switch makes
Very wide with range, line service amount is big, it is desirable to be able to switch state locally be explicitly indicated, and reporting the position of the switch automatically
With the pressure switch of status information, to simplify maintenance work, raising efficiency and safety.
Summary of the invention
It is an object of the invention to: a kind of with explosion prevention function, compact-sized pressure switch and its user are provided
Method generates explosion time when explosive gas encounters electric spark inside electrical equipment using Explosion-proof Design, can prevent its biography
Be delivered to outside, effectively avoid the generation of serious safety accident, at the same have can adjust pressure threshold, display report switch state
The characteristics of.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of compact pressure switch of explosion-proof type, including shell, electrical connector and process adapter, it is characterised in that: the shell
Body is cuboid, and inside is equipped with cylindrical cavity, the shell left end and the process adapter screw thread for connecting pressure source
The sealing of the second sealing ring is connected and passes through, the process adapter right side, the enclosure interior are equipped with cylindrical piston boit, described
It is equipped with axle sleeve on the outside of piston boit, third sealing ring, the axle sleeve and the work are equipped between the axle sleeve and the process adapter
It is equipped with this spy's envelope between stick harness, cylindrical mandril is equipped on the right side of the piston boit, is cased with gasket and spring on the outside of the mandril, institute
It states electrical connector described in shell right end grafting and is located on the right side of the spring, the rivet of circular ring shape is equipped on the right side of the electrical connector
Lid, is fixedly connected by rivet with the shell, and the first sealing ring, the electricity are equipped between the electrical connector and the shell
Switch element is equipped in device connector, the switch element outside is equipped with fixing sleeve and solid by positioning clamping pin and the electrical connector
Fixed connection, the switch element connecting wire are simultaneously drawn from the electrical connector right end, and the piston boit under pressure can
Enough push the mandril to move horizontally in the shell and the spring is compressed and discharged, when the piston boit by
Pressure the mandril can be pushed to compress the spring to the right and be closed the switch element when reaching switching threshold.
The additional project that the present invention further improves and implements is:
Look nut and voltage regulation component, the look nut and voltage regulation component socket are additionally provided in the enclosure interior
On the outside of the mandril and it is located on the right side of the spring, the position of the spring can be carried out by rotating the look nut
Limitation is provided with multiple holes, is equipped with jackscrew in hole to adjust the pressure threshold of triggering pressure switch on the look nut outer wall,
It is fixed for the position to the look nut, the cover board fixed by cover screw is equipped on rear side of the shell, is opened
The voltage regulation component and look nut can be adjusted in the cover board, and the housing bottom is equipped with ground wire screw and explosion-proof plug.
Flexible sheet is additionally provided in the process adapter, the flexible sheet side is in contact with pressure source medium, another
Side is in contact with the piston boit, and the flexible sheet can generate deformation under pressure and push the piston boit in institute
State horizontal movement in shell, the piston boit can push the mandril moved horizontally in the shell and to the spring into
Row compression and release, when the pressure being subject to reaches switching threshold, the piston boit can be pushed described in the mandril compresses to the right
Spring is simultaneously closed the switch element.
Switch state indicator light is additionally provided in the rivet cover, the switch state indicator light is electrically connected with the switch element
It connects, when switch element closure, the switch state indicator light is bright.
Long-distance alarm apparatus is additionally provided with above the shell, the long-distance alarm apparatus is equipped with big-dipper satellite short message and communicates mould
Block is preset the alarm short message comprising location information and switch state, and is triggered by the switch element, when the switch element
When closure, the long-distance alarm apparatus is triggered and sends alarm short message to preset alert receipt end.
The application method of the above-mentioned compact pressure switch of explosion-proof type of the present invention includes the following steps:
1) switching threshold of the compact pressure switch of explosion-proof type is debugged and is set, by the compact pressure switch of explosion-proof type with
Pressure testers are connected, and open the cover board, and the voltage regulation component and look nut are adjusted, and adjust and arrive required switch
Threshold value back spin presses closer silk and the look nut position is fixed, and is closed the cover board, screws cover screw；
2) process adapter of the compact pressure switch of explosion-proof type is connected with pressure source；
3) conducting wire that the electrical connector of the compact pressure switch of explosion-proof type is drawn is electrically connected with controlled device；
4) after completing step 3), the compact pressure switch of explosion-proof type enters normal operating conditions, when the medium pressure in pressure source
When power reaches the switching threshold of setting, the piston boit promotion mandril, which moves right, to be compressed the spring (12) and is closed institute
Switch element is stated, while triggering controlled device.
Beneficial effects of the present invention: a kind of compact pressure switch of explosion-proof type provided by the invention and its application method are applicable in
In the hydraulic or pneumatic system for having flame proof requirement, explosion is generated when explosive gas encounters electric spark inside electrical equipment
When, it can be prevented to be transmitted to outside, effectively avoid the generation of serious safety accident, it is compact-sized reasonable to have, and use is safe
Reliable advantage；And can be adjusted according to the needs the threshold value of pressure switch, when pressure value reaches the threshold value of setting, switching
State instruction can be locally being provided and management end distally issues the warning message with location information while movement, just
It found the abnormal situation in time in maintenance personnel, simplify system maintenance work.Meanwhile process adapter of the invention can assemble bullet
Property diaphragm, allow the invention to be suitable for pressure source medium there is corrosivity, the occasion of vicidity, application range is wider.
Detailed description of the invention
Fig. 1 is structure of the invention main view.
Fig. 2 is structure of the invention left view.
Fig. 3 is structure of the invention A-A cross-sectional view.
In figure, 1- shell；2- electrical connector；3- rivet cover；4- rivet；5- positioning clamping pin；6- switch element；7- is fixed
Set；The first sealing ring of 8-；9- voltage regulation component；10- jackscrew；11- look nut；12- spring；13- mandril；14- gasket；15- axis
Set；The second sealing ring of 16-；17- third sealing ring；The special envelope of 18- Si；19- piston boit；20- process adapter；21- ground wire screw；
22- cover screw；23- cover board；25- conducting wire.
Specific embodiment
Magnetic differential pressure gauge of the invention and its application method are described further with reference to the accompanying drawings and examples:
A kind of compact pressure switch of explosion-proof type, including shell 1, electrical connector 2 and process adapter 20, the shell 1 are length
Cube, inside are equipped with cylindrical cavity, and 1 left end of shell is threadedly coupled with the process adapter 20 for connecting pressure source
And sealed by the second sealing ring 16, it is equipped with cylindrical piston boit 19 inside 20 right side of process adapter, the shell 1,
It is equipped with axle sleeve 15 on the outside of the piston boit 19, third sealing ring 17 is equipped between the axle sleeve 15 and the process adapter, it is described
It is equipped with this spy's envelope 18 between axle sleeve 15 and the piston boit 19, is equipped with cylindrical mandril 13, the top on the right side of the piston boit 19
Gasket 14 and spring 12 are cased on the outside of bar 13, electrical connector 2 described in the 1 right end grafting of shell is simultaneously located at 12 right side of spring
Side is equipped with the rivet cover 3 of circular ring shape on the right side of the electrical connector 2, is fixedly connected by rivet 4 with the shell 1, the electric appliance
It is equipped with the first sealing ring 8 between connector 2 and the shell 1, is equipped with switch element 6, the switch element in the electrical connector 2
6 outsides are equipped with fixing sleeve 7 and are fixedly connected by positioning clamping pin 5 with the electrical connector 2,6 connecting wire of switch element
It 25 and is drawn from 2 right end of electrical connector, the piston boit 19 can push the mandril 13 described under pressure
It is moved horizontally in shell 1 and the spring 12 is compressed and discharged, when the pressure that the piston boit 19 is subject to reaches switch
The mandril 13 can be pushed to compress the spring 12 to the right when threshold value and be closed the switch element 6.
It is additionally provided with look nut 11 and voltage regulation component 9 inside the shell 1, convenient for according to specific needs to this explosion-proof type
The switching threshold of compact pressure switch is adjusted setting, keeps its use more flexible, the scope of application is wider；The look nut
11 and the voltage regulation component 9 be socketed in 13 outside of the mandril and be located at 12 right side of spring, pass through the rotation pressure regulation spiral shell
Mother 11 can limit the position of the spring 12, to adjust the pressure threshold of triggering pressure switch, the look nut
It is provided with multiple holes on 11 outer walls, is equipped with jackscrew 10 in hole, is fixed for the position to the look nut 11, prevents from switching
Threshold value changes in use after adjusting in place, influences the accuracy of threshold value setting；It is equipped on rear side of the shell 1 rectangular
Cover board 23, the cover board 23 are fixedly connected by cover screw 22 with the shell 1, and opening the cover board 23 can be to the shell
The voltage regulation component 9 and look nut 11 in 1 are adjusted, and setting cover board 23 can be convenient user's opening and be adjusted, and make
The compact pressure switch of this explosion-proof type using more convenient；1 bottom of shell is equipped with ground wire screw 21 and explosion-proof plug.
Flexible sheet is additionally provided in the process adapter 20, the flexible sheet side is in contact with pressure source medium, separately
Side is in contact with the piston boit 19, and the flexible sheet can generate deformation under pressure and push the piston boit
19 horizontal movements in the shell 1, the piston boit 19 can push the mandril 13 to move horizontally simultaneously in the shell 1
The spring 12 is compressed and discharged, the piston boit 19 can push described when the pressure being subject to reaches switching threshold
Mandril 13 compresses to the right the spring 12 and is closed the switch element 6.Flexible sheet is set in process adapter, so that this hair
The bright pressure source medium that can be suitable for has corrosivity, the occasion of vicidity, and application range is wider.
Switch state indicator light, 6 electricity of the switch state indicator light and the switch element are additionally provided in the rivet cover 3
Connection, when the switch element 6 closure, the switch state indicator light is bright, clear originally anti-in use convenient for user
The state of the quick-fried compact pressure switch of type.
Long-distance alarm apparatus is additionally provided with above the shell 1, the long-distance alarm apparatus is equipped with big-dipper satellite short message and communicates mould
Block is preset the alarm short message comprising location information and switch state, and is triggered by the switch element 6, when the switch member
When part 6 is closed, the long-distance alarm apparatus is triggered and sends alarm short message to preset alert receipt end.Long-distance alarm apparatus energy
Enough that the warning message for having position and status information is issued to preset distant place management end, personnel convenient for safeguarding note abnormalities in time
Situation simplifies the maintenance work of system.
The application method of the above-mentioned compact pressure switch of explosion-proof type of the present invention includes the following steps:
1) switching threshold of the compact pressure switch of explosion-proof type is debugged and is set, by the compact pressure switch of explosion-proof type with
Pressure testers are connected, and open the cover board, and the voltage regulation component and look nut are adjusted, and adjust and arrive required switch
Threshold value back spin presses closer silk and the look nut position is fixed, and is closed the cover board, screws cover screw；
2) process adapter of the compact pressure switch of explosion-proof type is connected with pressure source；
3) conducting wire that the electrical connector of the compact pressure switch of explosion-proof type is drawn is electrically connected with controlled device；
4) after completing step 3), the compact pressure switch of explosion-proof type enters normal operating conditions, when the medium pressure in pressure source
When power reaches the switching threshold of setting, the piston boit 19 pushes the mandril 13 to move right to compress the spring 12 and be closed
The switch element 6, while triggering controlled device.
In specific embodiments of the present invention, shell, process adapter, piston boit use 316SS stainless steel, and sealing ring uses
Fluorubber, switch element type include that single-pole double throw and double-pole pair are set, and flame proof grade is Exd IICT6, in petrochemical industry
It is applied in Gas Industry, achieves good application effect.
It should be pointed out that several improvement and change can also be made under the premise of not departing from basic structure of the present invention, these
The technical solution of similar improvement and change also should be regarded as the protection scope of this patent.
Claims (6)
1. a kind of compact pressure switch of explosion-proof type, including shell (1), electrical connector (2) and process adapter (20), feature exists
In: the shell (1) is cuboid, and inside is equipped with cylindrical cavity, shell (1) left end and the institute for connecting pressure source
Process adapter (20) are stated to be threadedly coupled and seal by the second sealing ring (16), on the right side of the process adapter (20), the shell
(1) internal to be equipped with cylindrical piston boit (19), it is cased with axle sleeve (15) on the outside of the piston boit (19), the axle sleeve (15) and institute
It states and is equipped with third sealing ring (17) between process adapter (20), it is special that this is equipped between the axle sleeve (15) and the piston boit (19)
It seals (18), cylindrical mandril (13) is equipped on the right side of the piston boit (19), is cased with gasket (14) and bullet on the outside of the mandril (13)
Spring (12), electrical connector (2) described in shell (1) the right end grafting are simultaneously located on the right side of the spring (12), the electrical connector
(2) right side be equipped with circular ring shape rivet cover (3), be fixedly connected by rivet (4) with the shell (1), the electrical connector (2) and
The first sealing ring (8) are equipped between the shell (1), are equipped with switch element (6) in the electrical connector (2), the switch member
It is cased with fixing sleeve (7) outside part (6) and is fixedly connected by positioning clamping pin (5) with the electrical connector (2), the switch element
(6) it connecting wire (25) and is drawn from the electrical connector (2) right end, the piston boit (19) can push under pressure
The mandril (13) moves horizontally in the shell (1) and the spring (12) is compressed and discharged, when the pressure being subject to
Power when reaching switching threshold the piston boit (19) mandril (13) can be pushed to compress the spring (12) to the right and be closed
The switch element (6).
2. the compact pressure switch of a kind of explosion-proof type according to claim 1, it is characterised in that: internal in the shell (1)
It is additionally provided with look nut (11) and voltage regulation component (9), the look nut (11) and voltage regulation component (9) are socketed in the mandril
(13) on the outside of and it is located on the right side of the spring (12), it can be to the position of the spring (12) by rotating the look nut (11)
It sets and is limited, be provided with multiple holes to adjust the pressure threshold of triggering pressure switch, on look nut (11) outer wall, in hole
Equipped with jackscrew (10), for the position of the look nut (11) to be fixed, it is equipped on rear side of the shell (1) and passes through cover board
The fixed cover board (23) of screw (22), the voltage regulation component (9) and look nut (11) can be carried out by opening the cover board (23)
It adjusts, shell (1) bottom is equipped with ground wire screw (21) and explosion-proof plug.
3. the compact pressure switch of a kind of explosion-proof type according to claim 2, it is characterised in that: in the process adapter (20)
It is additionally provided with flexible sheet, the flexible sheet side is in contact with pressure source medium, and the other side connects with the piston boit (19)
Touching, the flexible sheet can generate deformation under pressure and push the piston boit (19) in the shell (1) interior water
Flat movement, the piston boit (19) can push the mandril (13) to move horizontally and in the shell (1) to the spring
(12) it is compressed and is discharged, the piston boit (19) can push the mandril when the pressure being subject to reaches switching threshold
(13) spring (12) is compressed to the right and is closed the switch element (6).
4. the compact pressure switch of a kind of explosion-proof type according to claim 2, it is characterised in that: on the rivet cover (3) also
Equipped with switch state indicator light, the switch state indicator light is electrically connected with the switch element (6), when the switch element
(6) when being closed, the switch state indicator light is bright.
5. the compact pressure switch of a kind of explosion-proof type according to claim 2, it is characterised in that: above the shell (1) also
Equipped with long-distance alarm apparatus, the long-distance alarm apparatus is equipped with big-dipper satellite short message communication module, presets comprising location information and opens
The alarm short message of off status, and triggered by the switch element (6), when the switch element (6) closure, the long-range report
Alert device is triggered and sends alarm short message to preset alert receipt end.
6. a kind of application method of the compact pressure switch of explosion-proof type according to claim 2, which is characterized in that the user
Method includes:
1) switching threshold of the compact pressure switch of explosion-proof type is debugged and is set, by the compact pressure switch of explosion-proof type and pressure
Tester is connected, and opens the cover board (23), the voltage regulation component (9) and look nut (11) is adjusted, adjusting is arrived
Required switching threshold back spin presses closer silk (10) and the position of the look nut (11) is fixed, and is closed the cover board
(23), the cover screw (22) are screwed；
2) process adapter (20) of the compact pressure switch of explosion-proof type is connected with pressure source；
3) conducting wire (25) that the electrical connector (2) of the compact pressure switch of explosion-proof type is drawn is electrically connected with controlled device；
4) after completing step 3), the compact pressure switch of explosion-proof type enters normal operating conditions, when the pressure medium in pressure source reaches
To setting switching threshold when, the piston boit (19) pushes the mandril (13) to move right to compress the spring (12) and close
The switch element (6) are closed, while triggering controlled device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811208087.6A CN108962672B (en) | 2018-10-17 | 2018-10-17 | Explosion-proof compact pressure switch and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811208087.6A CN108962672B (en) | 2018-10-17 | 2018-10-17 | Explosion-proof compact pressure switch and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108962672A true CN108962672A (en) | 2018-12-07 |
| CN108962672B CN108962672B (en) | 2024-04-09 |
Family
ID=64480802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811208087.6A Active CN108962672B (en) | 2018-10-17 | 2018-10-17 | Explosion-proof compact pressure switch and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108962672B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044536A (en) * | 2019-05-17 | 2019-07-23 | 大唐半导体科技有限公司 | A kind of gas-detecting device |
| CN110534364A (en) * | 2019-08-13 | 2019-12-03 | 六安一六八航空航天精密器件有限公司 | A kind of flexible membrane switch sensing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2919505Y (en) * | 2006-02-23 | 2007-07-04 | 侯耀淞 | Pressure switch |
| CN201315289Y (en) * | 2008-10-27 | 2009-09-23 | 常州澳丰机电制造有限公司 | Intrinsic safety pressure switch for mine |
| CN202084473U (en) * | 2011-06-09 | 2011-12-21 | 刘晓红 | Anti-explosion pressure switch |
| CN202855633U (en) * | 2012-10-23 | 2013-04-03 | 常州市天利控制器制造有限公司 | Pressure controller |
| CN208848824U (en) * | 2018-10-17 | 2019-05-10 | 河北领冠仪器仪表有限公司 | A kind of compact pressure switch of explosion-proof type |
-
2018
- 2018-10-17 CN CN201811208087.6A patent/CN108962672B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2919505Y (en) * | 2006-02-23 | 2007-07-04 | 侯耀淞 | Pressure switch |
| CN201315289Y (en) * | 2008-10-27 | 2009-09-23 | 常州澳丰机电制造有限公司 | Intrinsic safety pressure switch for mine |
| CN202084473U (en) * | 2011-06-09 | 2011-12-21 | 刘晓红 | Anti-explosion pressure switch |
| CN202855633U (en) * | 2012-10-23 | 2013-04-03 | 常州市天利控制器制造有限公司 | Pressure controller |
| CN208848824U (en) * | 2018-10-17 | 2019-05-10 | 河北领冠仪器仪表有限公司 | A kind of compact pressure switch of explosion-proof type |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110044536A (en) * | 2019-05-17 | 2019-07-23 | 大唐半导体科技有限公司 | A kind of gas-detecting device |
| CN110534364A (en) * | 2019-08-13 | 2019-12-03 | 六安一六八航空航天精密器件有限公司 | A kind of flexible membrane switch sensing device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108962672B (en) | 2024-04-09 |
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