CN203617213U - Explosion-proof pressure switch capable of limiting spark energy - Google Patents
Explosion-proof pressure switch capable of limiting spark energy Download PDFInfo
- Publication number
- CN203617213U CN203617213U CN201320776744.3U CN201320776744U CN203617213U CN 203617213 U CN203617213 U CN 203617213U CN 201320776744 U CN201320776744 U CN 201320776744U CN 203617213 U CN203617213 U CN 203617213U
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- explosion
- box body
- pressure
- shaft shoulder
- proof box
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Abstract
The utility model discloses an explosion-proof pressure switch capable of limiting spark energy. The explosion-proof pressure switch comprises an explosion-proof box body, the box body is provided with an explosion-proof box cover, the explosion-proof box body is provided with cable introducing devices, a pressure regulating device used for adjusting petroleum pipeline pressure, a fixed plate and a microswitch are disposed in the explosion-proof box body, and the microswitch and the fixed plate are horizontally disposed in the explosion-proof box body. Oil pressure in a liquid oil way in a system is monitored in real time by using the pressure regulating device formed by a pressure spring, a torsion spring, a screw shaft and a corrugated spring tube, when the liquid oil pressure value is greater than a set value, a driving rod of the microswitch is triggered by displacement movement of the threaded rod, so that a power circuit is turned off timely, large-energy current spark is prevented, spark energy limitation is further achieved, and requirements of a safe explosion-proof pressure switch are met.
Description
Technical field
The utility model relates to a kind of flame-proof switch technical field, relates in particular to a kind of anti-explosion pressure switch that limits spark energy.
Background technology
The electric equipment that there is explosive gas atmosphere and use, conventionally there are hydraulic pressure and pneumatic system, and whether hydraulic pressure and pneumatic intrasystem fluid pressure meet electric equipment requirement, it is the important technology index of electric equipment security performance, so the pressure switch that conventionally needs installation to have explosion prevention function is carried out the pressure size in supervisory control system.And common flame-proof switch does not all have explosion-resistant enclosure, or on explosion-resistant enclosure, all there is wind-tunnel, so when pressure switch is in the time being switched on or switched off, switch contact can produce arc spark, may there is the danger of lighting explosive gas mixture in this spark, if and this blast is delivered in whole explosive gas atmosphere, will cause serious security incident.
Utility model content
The purpose of this utility model is to provide a kind of anti-explosion pressure switch that limits spark energy, and the pressure in can real-time monitoring system can source switch when exceeding that set point disconnects automatically, avoids occurring serious peril.
The utility model adopts following technical proposals:
A kind of anti-explosion pressure switch that limits spark energy, comprise explosion-proof box body, on box body, be provided with explosion-proof lid, on described explosion-proof box body, be provided with cable entry, in explosion-proof box body, be provided with pressure controlling device, fixed head and sensitive switch for regulating petroleum pipeline pressure, sensitive switch and fixed head are horizontally set in explosion-proof box body, and described pressure controlling device is connected with outside fluid pipeline by pipe joint; Described pressure controlling device is made up of knob, screw shaft and ripple bourdon tube from top to bottom successively, described screw shaft is through fixed head setting, and the side near knob in fixed head both sides is provided with first shaft shoulder, opposite side is provided with second, third shaft shoulder, on screw shaft between first shaft shoulder and explosion-proof box body, be socketed with torsion spring, between second shaft shoulder and the 3rd shaft shoulder, be provided with the drive rod of sensitive switch; The take-off lever end of ripple bourdon tube is provided with the 4th shaft shoulder, on the take-off lever between the 4th shaft shoulder and explosion-proof box body, is socketed with the first stage clip, is also provided with the reset combination unit for sensitive switch is resetted between the second described shaft shoulder and the 3rd shaft shoulder.
Described reset combination unit comprises loop bar and turncap, described loop bar one end is provided with the 5th shaft shoulder, between the 5th shaft shoulder and explosion-proof box body, is socketed with the second stage clip, and the other end is arranged on armored cassette external body, and be fixed by turncap, the 5th shaft shoulder and screw shaft are adjacent to setting.
Described cable entry comprises rubber seal, metal washer and clamp nut.
The hardness of described rubber seal is 45 degree-55 degree.
Described reset combination unit and pressure controlling device and explosion-proof box body joint are provided with rubber seal, metal washer.
The drive rod of described sensitive switch is insulating bar.
On described pressure controlling device, be also provided with pressure scale.
The utility model uses the size of oil pressure value in the liquid oil circuit in the pressure controlling device real-time monitoring system being made up of stage clip, torsion spring, screw shaft and ripple bourdon tube, thereby in the time that being greater than set point, liquid oil pressure value moves by the displacement of threaded rod the drive rod that touches sensitive switch, thereby interrupting power circuit in time, avoid producing macro-energy electric current spark, and then realize spark limit energy, meet the requirement of safety anti-explosive pressure switch.The utility model further arranges reset combination unit for after disconnecting when sensitive switch on pressure controlling device, when fixing a breakdown or pressure recovers hand-reset pressure controlling device afterwards, and then reset micro switch, make the anti-explosion pressure switch can be more safe and effective.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is side structure schematic diagram of the present utility model;
Fig. 3 is the structural representation before the utility model switch motion;
Fig. 4 is the structural representation after the utility model switch motion.
Embodiment
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of anti-explosion pressure switch that limits spark energy, comprise explosion-proof box body 3, on explosion-proof box body 3, be provided with explosion-proof lid 1, on described explosion-proof box body 3, be provided with cable entry 4, in explosion-proof box body 3, be provided with pressure controlling device 2, fixed head 20 and sensitive switch 5 for regulating petroleum pipeline pressure, sensitive switch 5 is horizontally set in explosion-proof box body 3 with fixed head 20, and described pressure controlling device 2 is connected with outside fluid pipeline 7 by pipe joint 8; Described pressure controlling device 2 is made up of knob 24, screw shaft 26 and ripple bourdon tube 9 from top to bottom successively, described screw shaft 26 arranges through fixed head 20, and the side near knob 24 in fixed head 20 both sides is provided with first shaft shoulder 21, opposite side is provided with second shaft shoulder 22, the 3rd shaft shoulder 23, on screw shaft 26 between first shaft shoulder 21 and explosion-proof box body 3, be socketed with the drive rod 30 that is provided with sensitive switch 5 between torsion spring 25, the second shaft shoulders 22 and the 3rd shaft shoulder 23; The take-off lever end of ripple bourdon tube 9 is provided with the 4th shaft shoulder 31, on take-off lever between the 4th shaft shoulder 31 and explosion-proof box body 3, be socketed with the first stage clip 32, between the second described shaft shoulder 22 and the 3rd shaft shoulder 23, be also provided with the reset combination unit 6 for sensitive switch 5 is resetted.
Described reset combination unit 6 comprises loop bar 12 and turncap 11, described loop bar 12 one end are provided with the 5th shaft shoulder 14, between the 5th shaft shoulder 14 and explosion-proof box body 3, be socketed with the second stage clip 13, the other end is arranged on explosion-proof box body 3 outsides, and be fixed by turncap 11, the 5th shaft shoulder 14 is adjacent to setting with screw shaft 26.
In order to make explosion-proof box body 3 better completely cut off explosion-proof spark under explosion-proof environment, described cable entry 4 comprises rubber seal, metal washer and clamp nut.Described reset combination unit 6 and pressure controlling device 2 are provided with rubber seal, metal washer with explosion-proof box body 3 joints.
The hardness of sealing ring is too low easily easily makes sealing ring high-temperature oxydation at high pressure-temperature gas in the time there is spark energy, and the much higher hard of sealing ring, also can cause the appearance of the situation such as poorly sealed; Preferably, the hardness of described sealing ring is 45 degree-55 degree.
The drive rod 30 of described sensitive switch 5 is insulating bar, avoids high-voltage breakdown ripple bourdon tube 9, and makes the monitorings such as oil circuit unsuccessfully cause power loss.
For the force value between knob 24 and torsion spring 25 is conveniently set, on described pressure controlling device 2, be provided with pressure scale 35, can observe intuitively rotation knob 24 time, the force value size of torsion spring 25, thereby the convenient value range of setting hydraulic pressure.
When the utility model work, under normal circumstances as shown in Figure 3, described torsion spring 25 strength are greater than the strength of the first stage clip 32, and screw shaft 26, in pressing down the position of drive rod for switch 30, is now normal condition, sensitive switch 5 closures.In the time that system internal pressure value variation and first pressure of stage clip 32 and the pressure of liquid are greater than the strength of torsion spring 25, as shown in Figure 4, ripple bourdon tube 9 presses on screw shaft 26 and moves, and drives drive rod 30 to move, and sensitive switch 5 is disconnected, thereby realize the protection of pressure; Now, under effect due to the second stage clip 13 in reset combination unit 6, in the middle of of loop bar 12 is just stuck between the second described shaft shoulder 22 of screw shaft 26 and the 3rd shaft shoulder 23, thereby while causing first pressure of stage clip 32 and the pressure of liquid to be less than the strength of torsion spring 25, screw shaft 26 can not move down, now only have and outwards extract reset combination unit, the spindle nose of loop bar 12 in combination unit 6 that makes to reset departs from the middle part of two shaft shoulders of screw shaft 26, screw shaft 26 just can move down, and pressure switch resets.Once this setting makes the utility model when occurring that pressure disconnects sensitive switch 5 after excessive, necessary operating personnel's hand-reset, gives the sufficient time thereby get rid of to operating personnel's fault, makes operation safer.
Claims (7)
1. one kind is limited the anti-explosion pressure switch of spark energy, comprise explosion-proof box body, on box body, be provided with explosion-proof lid, it is characterized in that: on described explosion-proof box body, be provided with cable entry, in explosion-proof box body, be provided with pressure controlling device, fixed head and sensitive switch for regulating petroleum pipeline pressure, sensitive switch and fixed head are horizontally set in explosion-proof box body, and described pressure controlling device is connected with outside fluid pipeline by pipe joint; Described pressure controlling device is made up of knob, screw shaft and ripple bourdon tube from top to bottom successively, described screw shaft is through fixed head setting, and the side near knob in fixed head both sides is provided with first shaft shoulder, opposite side is provided with second, third shaft shoulder, on screw shaft between first shaft shoulder and explosion-proof box body, be socketed with torsion spring, between second shaft shoulder and the 3rd shaft shoulder, be provided with the drive rod of sensitive switch; The take-off lever end of ripple bourdon tube is provided with the 4th shaft shoulder, on the take-off lever between the 4th shaft shoulder and explosion-proof box body, is socketed with the first stage clip, is also provided with the reset combination unit for sensitive switch is resetted between the second described shaft shoulder and the 3rd shaft shoulder.
2. the anti-explosion pressure switch of restriction spark energy according to claim 1, it is characterized in that: described reset combination unit comprises loop bar and turncap, described loop bar one end is provided with the 5th shaft shoulder, between the 5th shaft shoulder and explosion-proof box body, be socketed with the second stage clip, the other end is arranged on armored cassette external body, and be fixed by turncap, the 5th shaft shoulder and screw shaft are adjacent to setting.
3. the anti-explosion pressure switch of restriction spark energy according to claim 2, is characterized in that: described cable entry comprises rubber seal, metal washer and clamp nut.
4. the anti-explosion pressure switch of restriction spark energy according to claim 3, is characterized in that: the hardness of described rubber seal is 45 degree-55 degree.
5. the anti-explosion pressure switch of restriction spark energy according to claim 4, is characterized in that: described reset combination unit and pressure controlling device and explosion-proof box body joint are provided with rubber seal, metal washer.
6. the anti-explosion pressure switch of restriction spark energy according to claim 5, is characterized in that: the drive rod of described sensitive switch is insulating bar.
7. the anti-explosion pressure switch of restriction spark energy according to claim 6, is characterized in that: on described pressure controlling device, be also provided with pressure scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320776744.3U CN203617213U (en) | 2013-12-02 | 2013-12-02 | Explosion-proof pressure switch capable of limiting spark energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320776744.3U CN203617213U (en) | 2013-12-02 | 2013-12-02 | Explosion-proof pressure switch capable of limiting spark energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617213U true CN203617213U (en) | 2014-05-28 |
Family
ID=50769840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320776744.3U Expired - Fee Related CN203617213U (en) | 2013-12-02 | 2013-12-02 | Explosion-proof pressure switch capable of limiting spark energy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617213U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014954A (en) * | 2015-04-21 | 2016-10-12 | 黄小良 | Pressure switch for plunger pump of high-pressure airless spraying machine |
-
2013
- 2013-12-02 CN CN201320776744.3U patent/CN203617213U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014954A (en) * | 2015-04-21 | 2016-10-12 | 黄小良 | Pressure switch for plunger pump of high-pressure airless spraying machine |
| CN106050598A (en) * | 2015-04-21 | 2016-10-26 | 黄小良 | Plunger pump for high-pressure airless spraying machine |
| CN106014954B (en) * | 2015-04-21 | 2017-08-25 | 黄小良 | The pressure switch of plunger pump of high-pressure airless sprayer |
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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: 20140528 Termination date: 20201202 |