CN202084473U - Anti-explosion pressure switch - Google Patents
Anti-explosion pressure switch Download PDFInfo
- Publication number
- CN202084473U CN202084473U CN2011201926451U CN201120192645U CN202084473U CN 202084473 U CN202084473 U CN 202084473U CN 2011201926451 U CN2011201926451 U CN 2011201926451U CN 201120192645 U CN201120192645 U CN 201120192645U CN 202084473 U CN202084473 U CN 202084473U
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- Prior art keywords
- pressure
- switch
- cover plate
- pressure sensor
- explosion
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Abstract
The utility model discloses an anti-explosion pressure switch including a shell. A cover plate is arranged above the shell. The cover plate is provided with a wire outlet hole. A pressure joint is disposed in a lower part of the shell. A pressure sensor, a transmission rod, a micro-switch and a wire are arranged successively above the pressure joint. A pressure film is arranged in an upper end of the pressure sensor to contact with the transmission rod. The periphery of the pressure film is welded with the pressure sensor to form an explosion separating combined surface. The wire extends outward through the wire outlet hole in the cover plate. A fixed joint is also installed on the transmission rod in a sleeving manner. A port is arranged in an upper end of the fixed joint. The fixed joint goes through the port and connects with the micro-switch through a switch bolt. A sealed explosion separating combined part is formed between the shell, the cover plate and the pressure joint through welding connection. In the utility model, timely feedback of abnormal pressure is realized by utilizing the cooperation between the pressure sensor and the micro-switch through a reasonable structure.
Description
Technical field
The utility model relates to a kind of industrial switch, and particularly a kind of can have the pressure switch of explosion prevention function again by the interior pressure of supervisory control system.
Background technology
The electric equipment of using for explosive gas atmosphere, hydraulic pressure and pneumatic system are all arranged usually, and whether hydraulic pressure and pneumatic intrasystem fluid pressure meet the safety requirements of electric equipment, be the important technology index of electric equipment security performance, come the interior pressure of supervisory control system so all need to install pressure switch usually with explosion prevention function.Because common pressure switch does not have flameproof enclosure, when running into electric spark, damp can produce blast, if this blast is delivered to whole explosive gas atmosphere, will cause serious security incident, therefore, be necessary to design and have the pressure switch of explosion prevention function again by the interior pressure of supervisory control system.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides a kind of can have the pressure switch of explosion prevention function again by the interior pressure of supervisory control system.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of explosion-proof pressure switch, comprise housing, the housing top is provided with cover plate, wire hole is arranged on the cover plate, described housing lower end is provided with compression fittings, be disposed with pressure sensor on this compression fittings, drive link, sensitive switch, lead, there is the pressure-sensitive diaphragm that contacts with drive link wherein said pressure sensor upper end, this pressure-sensitive diaphragm edge and pressure sensor form the flame proof faying face by being welded to connect, lead is protruding by the wire hole on the cover plate, also be set with permanent joint on the drive link, the upper end of this permanent joint is provided with interface, permanent joint passes interface by the switch screw and is connected with sensitive switch, described housing and cover plate, form airtight flame proof joint portion by being welded to connect between the compression fittings, when the explosion time that damp produces when enclosure interior runs into electric spark, can stop it to be delivered to outside whole explosive gas atmosphere, can effectively avoid serious security incident.
In order to make the wire hole place tightr, and make things convenient for lead to stretch out, and described wire hole also is provided with the card wire terminal of built-in sealing ring, and this card wire terminal is by being threaded in wire hole, sealing ring plays the effect that compresses lead, thereby guarantees to form airtight relatively flame proof binder course.
More convenient and firm for the installation that makes compression fittings, described compression fittings upside is provided with the joint internal thread of the conical surface, and the downside of pressure sensor is provided with and joint internal thread corresponding sensor external screw thread.
In order to make internal structure further compact, be set with the installation nut that is connected with compression fittings on described pressure sensor and the permanent joint, the nut lower end wherein to be installed to be threaded with compression fittings, the upper end of installation nut is threaded with permanent joint.
The adjustment of sensitive switch position for convenience, described interface is set to the T type groove of upper end open, by unscrewing and tightening the switch screw, can regulate the axial location of sensitive switch.
The beneficial effects of the utility model are: this switch passes through rational structure, by compression fittings, housing, cover plate, sealing ring, reliable flameproof enclosure of the common composition of card wire terminal, and utilize pressure sensor to match and realize that thereby pressure signal is converted to the timely feedback of electric switch signal to pressure anomaly with sensitive switch, between housing and cover plate, the compression fittings by being welded to connect the better while of sealing explosion-proof effect that can make housing, reduced manufacturing procedure, have simple in structure, volume is small and exquisite, technology is simple, stable performance, characteristics such as with low cost; The T type groove design of this external tapping makes sensitive switch adjust according to the parts actual size, effectively protects sensitive switch, increases the service life.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is a scheme of installation of the present utility model;
Fig. 2 is the front view of the utility model permanent joint;
Fig. 3 is the vertical view of the utility model permanent joint.
Embodiment
With reference to Fig. 1.A kind of explosion-proof pressure switch comprises housing 1, and housing 1 top is provided with cover plate 2, and wire hole 21 is arranged on the cover plate 2, and described housing 1 lower end is provided with compression fittings 3, is disposed with pressure sensor 4, drive link 5, sensitive switch 6, lead 7 on this compression fittings 3.There is the pressure-sensitive diaphragm 41 that contacts with drive link 5 wherein said pressure sensor 4 upper ends, these pressure-sensitive diaphragm 41 edges and pressure sensor 4 form flame proof faying face 42 by being welded to connect, thereby pressure-sensitive diaphragm 41 can produce 5 displacements of deformation drive drive link along with pressure changes.Lead 7 is protruding by the wire hole 21 on the cover plate 2, also be set with permanent joint 8 on the drive link 5, drive link 5 can move axially along permanent joint 8, the upper end of this permanent joint 8 is provided with interface 81, permanent joint 8 passes interface 81 by switch screw 82 and is connected with sensitive switch 6, play the fixedly effect of sensitive switch 6, described housing 1 and cover plate 2, form airtight flame proof joint portion 11 by being welded to connect between the compression fittings 3, the explosion time that when enclosure interior runs into electric spark, produces when damp, can stop it to be delivered to outside whole explosive gas atmosphere, serious security incident can be effectively avoided, better flame proof effect can be played compared with original thread connecting mode.
In order to make wire hole 21 places tightr, and make things convenient for lead 7 to stretch out, described wire hole 21 also is provided with the card wire terminal 22 of built-in sealing ring 23, this card wire terminal 22 is by being threaded in wire hole 21, sealing ring 23 plays the effect that compresses lead 7, thereby guarantees to form airtight relatively flame proof binder course.
For the installation that makes compression fittings 3 more convenient and firm, described compression fittings 3 upsides are provided with the joint internal thread 31 of the conical surface, the downside of pressure sensor 4 is provided with and joint internal thread 31 corresponding sensor external screw threads 43, forms an airtight relatively flame proof binder course between compression fittings 3 and the pressure sensor 4 thereby make.
In order to make structure further compact, be set with the installation nut 9 that is connected with compression fittings 3 on described pressure sensor 4 and the permanent joint 8, nut 9 lower ends wherein to be installed to be threaded with compression fittings 3, the upper end of installation nut 9 is threaded with permanent joint 8.This installation nut 9 can play the effect of protection pressure sensor 4.
With reference to Fig. 2, Fig. 3.Because permanent joint 8 does not belong to the standard class part, size is difficult to guarantee accurately, but directly influence the installation site of sensitive switch 6, when the installation site of sensitive switch 6 is too leaned on last, can cause sensitive switch 6 and drive link 5 loose contacts easily, otherwise the installation site of working as sensitive switch 6 is too by following, sensitive switch 6 is broken, therefore the adjustment of sensitive switch 6 positions for convenience, described interface 81 is set to the T type groove of upper end open, makes the installation site of sensitive switch 6 can be by unscrewing and tightening switch screw 82 and adjust up and down along interface 81.
When real work, compression fittings 3 is connected with the penstock that needs to install, mesopore by compression fittings 3 imports fluid, 7 in lead is connected with control device, when unusual the rising appears in the fluid pressure that feeds compression fittings 3, pressure-sensitive diaphragm 41 on the pressure sensor 4 can produce deformation, drive the closing of contact or the disconnection of drive link 5 displacements up to sensitive switch 6,6 of sensitive switches pass through lead 7 and export the electrical control gears that the electric switch signals are given electric equipment synchronously, have realized that the high pressure conversion of signals is the function of electric switch signal; When pressure is replied just often, pressure-sensitive diaphragm 41 reinstatements, drive link 5 separates with sensitive switch 6, and 6 of sensitive switches are exported the electrical control gear that the electric switch signal is given electric equipment synchronously, realized that the low-pressure conversion of signals is the function of electric switch signal, represented that promptly pressure has recovered normal.
This utility model is passed through rational structure, utilize pressure sensor 4 to match to realize timely feedback to pressure anomaly with sensitive switch 6, realize that pressure signal is converted to the electric switch signal, form reliable flameproof enclosure by being welded to connect between housing 1 and cover plate 2, the compression fittings 3, can make the sealing better while of explosion-proof effect, reduce assembly process.
Claims (5)
1. explosion-proof pressure switch, comprise housing (1), housing (1) top is provided with cover plate (2), wire hole (21) is arranged on the cover plate (2), it is characterized in that: described housing (1) lower end is provided with compression fittings (3), be disposed with pressure sensor (4) on this compression fittings (3), drive link (5), sensitive switch (6), lead (7), there is the pressure-sensitive diaphragm (41) that contacts with drive link (5) wherein said pressure sensor (4) upper end, this pressure-sensitive diaphragm (41) edge and pressure sensor (4) form flame proof faying face (42) by being welded to connect, lead (7) is protruding by the wire hole (21) on the cover plate (2), also be set with permanent joint (8) on the drive link (5), the upper end of this permanent joint (8) is provided with interface (81), permanent joint (8) passes interface (81) by switch screw (82) and is connected with sensitive switch (6), described housing (1) and cover plate (2), between the compression fittings (3) by being welded to connect.
2. a kind of explosion-proof pressure switch according to claim 1 is characterized in that: described wire hole (21) also is provided with the card wire terminal (22) of built-in sealing ring (23), and this card wire terminal (22) is by being threaded in wire hole (21).
3. a kind of explosion-proof pressure switch according to claim 1, it is characterized in that: described compression fittings (3) upside is provided with the joint internal thread (31) of the conical surface, and the downside of pressure sensor (4) is provided with and joint internal thread (31) corresponding sensor external screw thread (43).
4. a kind of explosion-proof pressure switch according to claim 1, it is characterized in that: be set with the installation nut (9) that is connected with compression fittings (3) on described pressure sensor (4) and the permanent joint (8), nut (9) lower end wherein is installed is threaded with compression fittings (3), the upper end that nut (9) is installed is threaded with permanent joint (8).
5. a kind of explosion-proof pressure switch according to claim 1 is characterized in that: described interface (81) is set to the T type groove of upper end open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201926451U CN202084473U (en) | 2011-06-09 | 2011-06-09 | Anti-explosion pressure switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201926451U CN202084473U (en) | 2011-06-09 | 2011-06-09 | Anti-explosion pressure switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202084473U true CN202084473U (en) | 2011-12-21 |
Family
ID=45345095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201926451U Expired - Lifetime CN202084473U (en) | 2011-06-09 | 2011-06-09 | Anti-explosion pressure switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202084473U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111768A (en) * | 2013-03-01 | 2013-05-22 | 无锡飞世龙机电有限公司 | Load switch anti-explosion cover plate welding method |
| CN108493049A (en) * | 2018-04-20 | 2018-09-04 | 浙江力夫自控技术股份有限公司 | Water circuit system pressure switch and assembly method |
| CN108962672A (en) * | 2018-10-17 | 2018-12-07 | 河北领冠仪器仪表有限公司 | A kind of compact pressure switch of explosion-proof type and its application method |
| CN112857653A (en) * | 2021-01-11 | 2021-05-28 | 三桥惠(佛山)新材料有限公司 | Contact type magnetic pressure sensor |
-
2011
- 2011-06-09 CN CN2011201926451U patent/CN202084473U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111768A (en) * | 2013-03-01 | 2013-05-22 | 无锡飞世龙机电有限公司 | Load switch anti-explosion cover plate welding method |
| CN108493049A (en) * | 2018-04-20 | 2018-09-04 | 浙江力夫自控技术股份有限公司 | Water circuit system pressure switch and assembly method |
| CN108493049B (en) * | 2018-04-20 | 2023-12-19 | 浙江力夫自控技术股份有限公司 | Pressure switch for waterway system and assembling method |
| CN108962672A (en) * | 2018-10-17 | 2018-12-07 | 河北领冠仪器仪表有限公司 | A kind of compact pressure switch of explosion-proof type and its application method |
| CN108962672B (en) * | 2018-10-17 | 2024-04-09 | 河北领冠仪器仪表有限公司 | Explosion-proof compact pressure switch and use method thereof |
| CN112857653A (en) * | 2021-01-11 | 2021-05-28 | 三桥惠(佛山)新材料有限公司 | Contact type magnetic pressure sensor |
| CN112857653B (en) * | 2021-01-11 | 2022-05-17 | 三桥惠(佛山)新材料有限公司 | Contact type magnetic pressure sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111221 |
|
| CX01 | Expiry of patent term |