CN203615949U - Explosion-proof eddy current sensor - Google Patents
Explosion-proof eddy current sensor Download PDFInfo
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- CN203615949U CN203615949U CN201320806269.XU CN201320806269U CN203615949U CN 203615949 U CN203615949 U CN 203615949U CN 201320806269 U CN201320806269 U CN 201320806269U CN 203615949 U CN203615949 U CN 203615949U
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Abstract
The utility model discloses an explosion-proof eddy current sensor. The explosion-proof eddy current sensor comprises an explosion-proof probe, an explosion-proof cable and a proximitor. The proximitor is arranged in a cast aluminum explosion-proof housing. One end of the explosion-proof cable is connected with the explosion-proof probe, and the other end is connected with the proximitor. The explosion-proof probe comprises a stainless steel probe explosion-proof shell. An epoxy resin glue block is arranged in the probe explosion-proof shell. A probe coil is embedded in the epoxy resin glue block. The cast aluminum explosion-proof housing comprises an upper shell body and a lower shell body. The upper shell body comprises an end cap. A connection cylinder is arranged on the lower end face of the end cap. The annular part between the outer ring of the connection cylinder and the outer ring of the end cap is a pressing surface. The outer cylinder wall of the connection cylinder is equipped with screw threads, and the inner wall of the lower shell body is equipped with screw threads cooperatively. The upper shell body and the lower shell body are fixed in a screw connection and form a screw thread explosion-proof surface. The pressing surface of the upper shell body and the upper end face of the lower shell body are in a tight fitting connection. A lead wire device hole and a plug hole are arranged in the side wall of the lower shell body. A lead wire device and a plug are fixed with the lower shell body through screw thread structures, and form screw thread explosion-proof surfaces respectively.
Description
Technical field
The utility model relates to a kind of sensor, relates in particular to a kind of for containing the anti-explosion electric eddy current sensor in explosion danger gas place.
Background technology
At present, in some places of containing explosion danger gas such as electric power, oil, chemical industry, metallurgy, for the Measurement accuracy of the radial vibration of the large rotating machinery axles such as steam turbine, the hydraulic turbine, fan blower, compressor, axial displacement, axle rotating speed, bias etc., adopting traditionally stops measures or adopts the instrument cubicle earthmeters such as speed pickup, it is not high that measurement result is subject to various factors to affect confidence level, meanwhile, parking detects and brings very large inconvenience to work.At present, on market, sell and have current vortex sensor, the distance of metal conductor measured apart from detecting head surface measured on the ground noncontact of current vortex sensor energy Static and dynamic, high linearity, high resolution ground, and current vortex sensor is a kind of non-contacting linearization metering outfit.Between current vortex sensor energy Measurement accuracy measured body (must be metallic conductor) and probe end face, the relative displacement of Static and dynamic changes.Although current vortex sensor can be measured the motion conditions of large rotating machinery axle well, but in the time that the place in containing explosion danger gas is used, the electric spark producing due to inside is easy to the hazardous gas of igniting, and causes unnecessary casualties and economic loss.
Utility model content
The purpose of this utility model is to provide a kind of explosion-proof type current vortex sensor, can effectively prevent explosive place because of use current vortex sensor explode, avoid unnecessary casualties and economic loss.
The technical solution adopted in the utility model is:
A kind of explosion-proof type current vortex sensor, comprise explosion-proof probe, anti-explosion cable and fore-lying device, fore-lying device is located in cast aluminium explosion-proof casing, anti-explosion cable one end connects explosion-proof probe, the other end connects fore-lying device, described explosion-proof probe comprises stainless steel probe explosion-proof shell, in probe explosion-proof shell, is provided with epoxy resin blob of viscose, the embedded probe coil that is provided with of epoxy resin blob of viscose, anti-explosion cable adopts rubber sheath flexible cable or the neoprene sheath soft cable without node, described cast aluminium explosion-proof casing comprises upper shell and lower house, upper shell comprises end cap, the lower surface of end cap is provided with connecting cylinder, the annular section of the outer distance of round end cap cylindrical of connecting cylinder is stitching surface, connecting cylinder outer tube wall is provided with screw thread, and the cooperation of lower house inwall is provided with screw thread, upper shell and lower house are spirally connected fixing, form threaded flame-proof type face, the stitching surface of upper shell fits tightly and is connected with lower house upper surface, on lower house sidewall, be provided with thread guide devices hole and plug hole, thread guide devices and plug are fixed by helicitic texture and lower house, form respectively threaded flame-proof type face, anti-explosion cable connects fore-lying device by thread guide devices.
Described thread guide devices comprises gland nut, packing ring and O-ring seal, the thread guide devices hole inwall of lower house is provided with screw thread, and the lateral wall of the gland nut that is connected, form explosion suppresion surface, the bottom of gland nut connects O-ring seal by packing ring, and gland nut interior diameter, packing ring interior diameter and O-ring seal interior diameter are consistent with anti-explosion cable overall diameter.
The plug hole inwall of described lower house is provided with screw thread, and the lateral wall of the plug that is connected, and forms explosion suppresion surface.
The cross-sectional area of described anti-explosion cable is more than or equal to 6mm
2.
The connecting portion of stitching surface and connecting cylinder is provided with groove, is provided with O-ring seal in groove.
Described epoxy resin blob of viscose outer wall is more than or equal to 3mm apart from the thickness of probe coil, the surfacing of epoxy resin blob of viscose.
Above-mentioned explosion suppresion surface is all screw-threaded engagement structure, and effectively length of action is more than or equal to 8mm, and effectively joggle number is more than or equal to 5.
On the inner and outer wall of described lower house, be equipped with ground terminal, connection terminal is connected with ground wire, and the cross-sectional area of ground wire is more than or equal to 4mm
2.
The utility model utilizes the explosion-proof casing of explosion-proof probe, anti-explosion cable and fore-lying device, make device in the time that explosive environments uses, can not ignite gas, even the detonation of device own, also only can be in the inner detonation of explosion-proof casing, the design of explosion-proof probe, anti-explosion cable and explosion-proof casing meets explosion-proof equipment required standard, effectively reduces the explosion accident of explosive place, reduces harm.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is explosion-proof sonde configuration schematic diagram of the present utility model.
Embodiment
As shown in Figure 1, 2, the utility model comprises explosion-proof probe 1, anti-explosion cable 2 and fore-lying device 8, fore-lying device 8 is located in cast aluminium explosion-proof casing, anti-explosion cable 2 one end connect explosion-proof probe 1, the other end connects fore-lying device 8, described explosion-proof probe 1 comprises stainless steel probe explosion-proof shell 17, in probe explosion-proof shell 17, is provided with epoxy resin blob of viscose 18, is embedded with probe coil 16 in epoxy resin blob of viscose 18, anti-explosion cable 2 adopts without the rubber sheath flexible cable of node or neoprene sheath soft cable, and the cross-sectional area of anti-explosion cable 2 is more than or equal to 6mm
2, described cast aluminium explosion-proof casing comprises upper shell 19 and lower house 3, upper shell 19 comprises end cap 4, the lower surface of end cap 4 is provided with connecting cylinder 5, the annular section of outer distance of round end cap 4 cylindricals of connecting cylinder 5 is stitching surface 6, stitching surface 6 is provided with groove with the connecting portion of connecting cylinder 5, in groove, be provided with O-ring seal 7, connecting cylinder 5 excircles are provided with screw thread, and the cooperation of lower house inwall is provided with screw thread, upper shell 19 is spirally connected fixing with lower house 3, form threaded flame-proof type face 9, the stitching surface 6 of upper shell 19 fits tightly and is connected with lower house 3 upper surfaces, on lower house 3 sidewalls, be provided with thread guide devices hole and plug hole, thread guide devices comprises gland nut 10, packing ring 11 and O-ring seal 12, the thread guide devices hole inwall of lower house 3 is provided with screw thread, and the lateral wall of the gland nut 10 that is connected, form explosion suppresion surface 9, the bottom of gland nut 10 connects O-ring seal 12 by packing ring 11, gland nut 10 interior diameters, packing ring 11 interior diameters are consistent with anti-explosion cable 2 overall diameters with O-ring seal 12 interior diameters, anti-explosion cable 2 connects fore-lying device 8 by thread guide devices, the plug hole inwall of lower house 3 is provided with screw thread, and the lateral wall of the plug 13 that is connected, and forms explosion suppresion surface 9, above-mentioned explosion suppresion surface 9 is all screw-threaded engagement structure, effectively length of action is more than or equal to 8mm, and effectively joggle number is more than or equal to 5, is equipped with ground terminal 14,15 on the inner and outer wall of lower house 3, connection terminal 14,15 is connected with ground wire, and the cross-sectional area of ground wire is more than or equal to 4mm
2.
The utility model reaches explosion-proof standard, can be applicable to hazardous area, be applicable to factory's existence and maybe may have II A, II B, II C class, explosion risk 1st district, 2 places, district that T1, T2, T3, T4, T5, T6 group inflammable gas, steam and air are mixed to form.Probe explosion-proof shell 17 adopts stainless steel material, and coil 16 is cores of probe, uses glue embedding in probe explosion-proof shell 17.Common sensor probe is inner generally lives coil by common rubber seal, as long as play the effect of fixed coil.And the glue of the utility model inside adopts epoxy resin 6101, and the minimum encapsulation thickness of coil 16 is not less than 3mm, encapsulation surfacing is without starved, without depression, flawless and bubble, and this encapsulation agent need meet the heat-resisting low temperature resistant test of GB3836.1 the 26.8th chapter and the 26.9th chapter regulation.
Anti-explosion cable 2 is for connecting the parts of explosion-proof probe 1 and fore-lying device 8, and general cable does not have explosion prevention function, and this device uses circular jacket, such as rubber sheath flexible cable, neoprene sheath soft cable etc., and these cables can bear dielectric strength and be not less than 2500VAC.The cable using in hazardous area can not have intermediate head, if hypertelorism need add wiring, needs to join anti-explosion terminal box two lines are coupled together, and anti-explosion cable 2 cross-sectional areas are not less than 6mm
2the sealing of the introducing device that enters fore-lying device explosion-proof casing is guaranteed.When installing, anti-explosion electric eddy current sensor should, according to the relevant regulations of GB3836.15-2000 " Electric Equipment in Explosive Gas Atmosphere the 15th part: the electric installation in hazardous area (except colliery) ", be responsible for installation by the professional of manufacturing plant.
The fore-lying device 8 of current vortex sensor is an E-signal processor, by 24V Power supply, on internal circuit board, comprise various electronic devices and components, the fore-lying device housing of common sensor is common metal or plastic casing, play the effect of common protection, can not use in dangerous place with a potential explosion, this device explosion-proof casing adopts flame-proof type flame-proof type housing.Like this; even if fore-lying device produces dangerous spark, cause explosion-proof casing internal explosion, can not propagate into outside initiation potential yet; play the regulation that explosion-proof provides the housing of explosive-proof protector must meet the corresponding clause of GB3836.1 and GB3836.2 for fore-lying device 8, this device specification is as follows:
The material of a, explosion-proof casing is cast aluminium, and thickness need be more than or equal to 5mm, cast aluminium material be not more than 7.5% containing magnesium and titanium amount.
Wiring place of b, explosion-proof casing need connect thread guide devices, cable lead device comprises gland nut 10, O-ring seal 12 and packing ring 11, O-ring seal 12 is used for clamping cables 2, gland nut 10 is used for packing washer 11 jam-packed O-ring seals 12, the place of connecting of cable lead device and explosion-proof casing need be metric thread, accuracy of thread is 6g/6H, and reach is not less than 8mm, and the number of threads is not less than 5 buttons.
C, explosion-proof casing are made up of two parts, upper shell 19 and lower house 3, and upper shell 19 and lower house 3 are fixed together by screw thread, faying face between upper shell 19 and lower house 3 is explosion-insulation surface, accuracy of thread is 6g/6H, and reach is not less than 8mm, and the number of threads is not less than 5 buttons.
The interior external ground of d, anti-explosion electric eddy current sensor is the important measures of guaranteeing its safe operation, ground terminal is located at respectively on the inwall, outer wall of lower house 3, and there is a ground connection sign board, if explosion-proof casing is charged, can import the earth by ground wire, prevent that people from getting an electric shock, the cross-sectional area of ground wire need be not less than 4mm
2.
Claims (8)
1. an explosion-proof type current vortex sensor, it is characterized in that: comprise explosion-proof probe, anti-explosion cable and fore-lying device, fore-lying device is located in cast aluminium explosion-proof casing, anti-explosion cable one end connects explosion-proof probe, the other end connects fore-lying device, described explosion-proof probe comprises stainless steel probe explosion-proof shell, in probe explosion-proof shell, is provided with epoxy resin blob of viscose, the embedded probe coil that is provided with of epoxy resin blob of viscose, anti-explosion cable adopts rubber sheath flexible cable or the neoprene sheath soft cable without node, described cast aluminium explosion-proof casing comprises upper shell and lower house, upper shell comprises end cap, the lower surface of end cap is provided with connecting cylinder, the annular section of the outer distance of round end cap cylindrical of connecting cylinder is stitching surface, connecting cylinder outer tube wall is provided with screw thread, and the cooperation of lower house inwall is provided with screw thread, upper shell and lower house are spirally connected fixing, form threaded flame-proof type face, the stitching surface of upper shell fits tightly and is connected with lower house upper surface, on lower house sidewall, be provided with thread guide devices hole and plug hole, thread guide devices and plug are fixed by helicitic texture and lower house, form respectively threaded flame-proof type face, anti-explosion cable connects fore-lying device by thread guide devices.
2. explosion-proof type current vortex sensor according to claim 1, it is characterized in that: described thread guide devices comprises gland nut, packing ring and O-ring seal, the thread guide devices hole inwall of lower house is provided with screw thread, and the lateral wall of the gland nut that is connected, form explosion suppresion surface, the bottom of gland nut connects O-ring seal by packing ring, and gland nut interior diameter, packing ring interior diameter and O-ring seal interior diameter are consistent with anti-explosion cable overall diameter.
3. explosion-proof type current vortex sensor according to claim 2, is characterized in that: the plug hole inwall of described lower house is provided with screw thread, and the lateral wall of the plug that is connected, and forms explosion suppresion surface.
4. explosion-proof type current vortex sensor according to claim 3, is characterized in that: the cross-sectional area of described anti-explosion cable is more than or equal to 6mm
2.
5. explosion-proof type current vortex sensor according to claim 4, is characterized in that: the connecting portion of stitching surface and connecting cylinder is provided with groove, is provided with O-ring seal in groove.
6. explosion-proof type current vortex sensor according to claim 5, is characterized in that: described epoxy resin blob of viscose outer wall is more than or equal to 3mm apart from the thickness of probe coil, the surfacing of epoxy resin blob of viscose.
7. explosion-proof type current vortex sensor according to claim 6, is characterized in that: above-mentioned explosion suppresion surface is all screw-threaded engagement structure, and effectively length of action is more than or equal to 8mm, and effectively joggle number is more than or equal to 5.
8. explosion-proof type current vortex sensor according to claim 7, is characterized in that: on the inner and outer wall of described lower house, be equipped with ground terminal, connection terminal is connected with ground wire, the cross-sectional area of ground wire is more than or equal to 4mm
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806269.XU CN203615949U (en) | 2013-12-10 | 2013-12-10 | Explosion-proof eddy current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320806269.XU CN203615949U (en) | 2013-12-10 | 2013-12-10 | Explosion-proof eddy current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203615949U true CN203615949U (en) | 2014-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320806269.XU Expired - Fee Related CN203615949U (en) | 2013-12-10 | 2013-12-10 | Explosion-proof eddy current sensor |
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| Country | Link |
|---|---|
| CN (1) | CN203615949U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699362A (en) * | 2016-01-25 | 2016-06-22 | 潍坊学院 | Explosion-proof type hydrogen flame ionization detector |
| CN106841715A (en) * | 2017-03-03 | 2017-06-13 | 浙江佳力防爆专用车辆技术有限公司 | Explosion-proof voltameter |
| CN110935310A (en) * | 2019-11-18 | 2020-03-31 | 海湾环境科技（北京）股份有限公司 | Explosion-proof hydrocarbon remover |
-
2013
- 2013-12-10 CN CN201320806269.XU patent/CN203615949U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105699362A (en) * | 2016-01-25 | 2016-06-22 | 潍坊学院 | Explosion-proof type hydrogen flame ionization detector |
| CN105699362B (en) * | 2016-01-25 | 2018-09-28 | 潍坊学院 | A kind of explosion-proof type flame ionization ditector |
| CN106841715A (en) * | 2017-03-03 | 2017-06-13 | 浙江佳力防爆专用车辆技术有限公司 | Explosion-proof voltameter |
| CN110935310A (en) * | 2019-11-18 | 2020-03-31 | 海湾环境科技（北京）股份有限公司 | Explosion-proof hydrocarbon remover |
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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: 20201210 |