CN110146656B - Explosion-proof breathing device of gas detector - Google Patents
Explosion-proof breathing device of gas detector Download PDFInfo
- Publication number
- CN110146656B CN110146656B CN201910486850.XA CN201910486850A CN110146656B CN 110146656 B CN110146656 B CN 110146656B CN 201910486850 A CN201910486850 A CN 201910486850A CN 110146656 B CN110146656 B CN 110146656B
- Authority
- CN
- China
- Prior art keywords
- explosion
- hole
- rear end
- proof
- cover
- 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.)
- Active
Links
- 230000029058 respiratory gaseous exchange Effects 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 13
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 125000003003 spiro group Chemical group 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Fire-Detection Mechanisms (AREA)
Abstract
The invention relates to an explosion-proof breathing device of a gas detector, which comprises a head cover, a rear end cover and a front end cover which are sequentially arranged from top to bottom, wherein a cavity is formed in the rear end cover and the front end cover; the inner wall of the lower part of the stepped hole is provided with a lug for positioning the head cover, and an explosion-proof sheet is arranged between the head cover and the lug. The explosion-proof piece fixing device is simple in structure and easy to operate, adopts an interference press fit mode to fix the explosion-proof piece and considers the ventilation time and the explosion-proof index.
Description
Technical Field
The invention relates to a flame-proof breathing device, in particular to a flame-proof breathing device of a gas detector.
Background
At present, a burst disc in a safety detection instrument mainly has two matching modes, wherein the burst disc is loaded from the lower side of a rear end cover, the burst disc is directly pressed into the rear end cover through the burst disc, and the burst disc is matched with the rear end cover in a small interference manner; another matching mode is an improved version on the existing basis, the explosion-proof sheet and the rear end cover are matched in a small clearance mode, then a locking ring structure is added behind the explosion-proof sheet to lock the explosion-proof sheet, and further the explosion-proof requirement is met.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the explosion-proof breathing device of the gas detector, which is simple in structure and easy to operate, adopts an interference press fit mode to fix the explosion-proof sheet, and considers the ventilation time and the explosion-proof index.
According to the technical scheme provided by the invention: a flame-proof breathing device of a gas detector comprises a head cover, a rear end cover and a front end cover which are sequentially arranged from top to bottom, wherein a cavity is formed in the rear end cover and the front end cover, a first through hole is formed in the head cover, an air inlet channel communicated with the cavity is formed by the first through hole, a step hole is formed in the upper portion of the rear end cover, and the head cover is connected with the step hole in an interference fit manner; the inner wall of the lower part of the stepped hole is provided with a lug for positioning the head cover, and an explosion-proof sheet is arranged between the head cover and the lug.
Further, the inner wall surface of the stepped hole is a smooth surface.
Furthermore, an O-shaped ring used for sealing the joint of the rear end cover and the front end cover is arranged at the joint of the rear end cover and the front end cover.
Furthermore, a guide angle is arranged at the opening of the stepped hole.
Furthermore, a chamfer is arranged at the upper part of the first through hole.
Further, the distance between the end part of the inner end of the lug and the inner wall of the step hole is more than or equal to 3.5 mm.
Furthermore, a second through hole is formed in the bump, and the aperture of the first through hole is equal to that of the second through hole.
Furthermore, a sensor assembly and a circuit board assembly are arranged in the cavity, and a sponge gasket is arranged between the sensor assembly and the rear end cover.
Further, the upper surface of hood is equipped with the screw thread, rain-proof cover subassembly and hood upper portion spiro union.
Furthermore, the surface of the middle part of the rear end cover is provided with knurled straight anti-slip lines.
Compared with the prior art, the invention has the following advantages:
the explosion-proof sheet press-fit structure can increase the size of the explosion-proof sheet distribution hole on the basis of the original structure, so that the size of the explosion-proof sheet is increased, the phenomenon that the instrument is ventilated too slowly due to the fact that the vent hole is too small is solved, and the requirement of ventilation time is met; in addition, the phenomenon that the explosion-proof piece is damaged due to operation errors when an operator assembles the explosion-proof piece is solved, the production loss is reduced, and the production efficiency is improved; the most important of course has solved the fixed problem of flame proof piece, compares with traditional fixed mode, has convenient assembling, simple structure, and processing is convenient, compresses tightly the flame proof piece through hood and the little interference fit of rear end cap, has avoided adopting traditional mode can not make the absolute fastening's of flame proof piece phenomenon.
Drawings
Fig. 1 is a schematic view of the working state of the present invention.
Fig. 2 is a schematic structural diagram of the rear end cap.
FIG. 3 is a schematic view of the construction of the hood.
Description of reference numerals: 1-rain cover component, 2-head cover, 3-explosion-proof sheet, 4-sponge gasket, 5-rear end cover, 6-sensor component, 7-O-shaped ring, 8-first through hole, 9-front end cover, 10-step hole, 11-lug, 12-second through hole, 13-guide angle, 14-chamfer and 15-circuit board component.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
As shown in fig. 1, 2 and 3, the explosion-proof breathing apparatus of a gas detector comprises a head cover 2, a rear end cover 5 and a front end cover 9 which are sequentially arranged from top to bottom, wherein a cavity is formed in the rear end cover 5 and the front end cover 9, a first through hole 8 is arranged on the head cover 2, an air inlet channel communicated with the cavity is formed by the first through hole 8, a step hole 10 is arranged at the upper part of the rear end cover 5, and the head cover 2 is connected with the step hole 10 in an interference fit manner; the inner wall of the lower part of the stepped hole 10 is provided with a bump 11 for positioning the head cover 2, and an explosion-proof sheet 3 is arranged between the head cover 2 and the bump 11.
The inner wall surface of the stepped hole 10 is a smooth surface.
And an O-shaped ring 7 for sealing the joint of the rear end cover 5 and the front end cover 9 is arranged at the joint of the rear end cover 5 and the front end cover 9.
Preferably, a guide angle 13 is arranged at an opening of the stepped hole 10, and a chamfer 14 is arranged at the upper part of the first through hole 8.
The distance between the end part of the inner end of the bump 11 and the inner wall of the stepped hole 10 is more than or equal to 3.5 mm.
A second through hole 12 is formed in the bump 11, and the first through hole 8 and the second through hole 12 have the same aperture.
A sensor assembly 6 and a circuit board assembly 15 are arranged in the cavity, and a sponge gasket 4 is arranged between the sensor assembly 6 and the rear end cover 5 to play a role in buffering.
The upper surface of hood 2 is equipped with the screw thread, rain-proof cover subassembly 1 and 2 upper portion spiro union of hood.
And the surface of the middle part of the rear end cover 5 is provided with knurled straight anti-slip lines.
The rain cover comprises a head cover 2, wherein the threads of the upper half part of the excircle of the head cover are used for being connected with a rain cover component 1, and the lower half part of the excircle of the head cover is used for being connected with a rear end cover 5 in a matched mode. Compress tightly explosion-proof piece 3 through hood 2 and the little excessive cooperation of rear end cap 5, avoided adopting traditional mode can not make the absolute fastening's of explosion-proof piece phenomenon. The middle first through hole 8 is used for ventilation, and a chamfer 14 at the upper end of the first through hole 8 plays a role in guiding an air inlet interface; rear end housing 5 upper end step hole 10 is used for installing explosion-proof piece 3 and hood 2, and middle cavity part is used for installing sensor subassembly 6 and sponge packing ring 4, and the screw on the rear end housing 5 is used for connecting the front end housing subassembly, and rear end housing 5 sets up holding screw hole to be connected rear end housing 5 and front end housing 9 through holding screw 8, the outer peripheral face of rear end housing 5 is equipped with anti-skidding line in addition, and anti-skidding line adopts the straight stripe of annular knurl.
The working principle and the working process of the invention are as follows: as shown in fig. 1, when a gas test is performed, the rain cover assembly 1 needs to be detached, then gas is introduced, and the gas enters the cavity of the rear end cover 5 through the explosion-proof piece 3, wherein the size of the first through hole 8 of the head cover 2 determines the flow rate of the gas flow entering in unit time, so that the gas time for filling the cavity is influenced, on the basis of the original structure, the size of the through hole of the head cover 2 is enlarged as much as possible under the condition that the size of one side of the bump 11 of the rear end cover 5 is larger than 3.5mm, the excircle size of the explosion-proof piece 3 is improved, and enough gas inflow in unit time is ensured, so that the cavity of the rear end cover 5 can be filled in a very short time, and the explosion-proof requirement is met; meanwhile, when the gas in the cavity of the rear end cover 5 is detonated, the other side of the explosion-proof sheet 3 is tightly matched with the head cover 2, so that the explosion-proof requirement can be met, and the explosion-proof cover is safer to use.
There is O type circle 7 front end housing assembly 9 and 5 threaded fit junctions of rear end housing, mainly guarantee the gas tightness of assembly face, avoid the poison gas to leak, the straight line design of annular knurl of 5 excircles of rear end housing, conveniently control in order to operate, avoid skidding, the inseparable cooperation of front end housing assembly 9 and rear end housing 5 can be consolidated to the holding screw, in addition before packing into explosion-proof piece 3, need to scribble right amount AB glue at rear end housing 5 and 3 knecks of explosion-proof piece, fasten 3 back hours, then scribble right amount white grease on the inner wall of rear end housing 5 and hood 2 contact, make things convenient for two parts to carry out the crimping.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (7)
1. A flame-proof breathing device of a gas detector comprises a head cover (2), a rear end cover (5) and a front end cover (9) which are sequentially arranged from top to bottom, wherein a cavity is formed in the rear end cover (5) and the front end cover (9), a first through hole (8) is formed in the head cover (2), and the first through hole (8) forms an air inlet channel communicated with the cavity, and is characterized in that a step hole (10) is formed in the upper part of the rear end cover (5), and the head cover (2) is connected with the step hole (10) in an interference fit manner; a bump (11) used for positioning the hood (2) is arranged on the inner wall of the lower part of the stepped hole (10), and an explosion-proof sheet (3) is arranged between the hood (2) and the bump (11); the inner wall surface of the stepped hole (10) is a smooth surface; the distance between the end part of the inner end of the bump (11) and the inner wall of the stepped hole (10) is more than or equal to 3.5mm, a second through hole (12) is formed in the bump (11), and the aperture of the first through hole (8) is equal to that of the second through hole (12).
2. An explosion-proof breathing device of a gas detector according to claim 1, characterized in that the junction of the rear end cap (5) and the front end cap (9) is provided with an O-ring (7) for sealing the joint of the rear end cap (5) and the front end cap (9).
3. An explosion-proof breathing device of a gas detector according to claim 1, characterized in that a guide angle (13) is arranged at the opening of the stepped hole (10).
4. An explosion-proof breathing device of a gas detector according to claim 1, characterized in that the upper part of the first through hole (8) is provided with a chamfer (14).
5. An explosion-proof breathing device of a gas detector according to claim 1, wherein a sensor component (6) and a circuit board component (15) are arranged in the chamber, and a sponge gasket (4) is arranged between the sensor component (6) and the rear end cover (5).
6. An explosion-proof breathing device of a gas detector according to claim 1, characterized in that the upper surface of the head cover (2) is provided with threads, and the rain cover assembly (1) is screwed with the upper part of the head cover (2).
7. An explosion-proof breathing device of a gas detector according to claim 1, characterized in that the surface of the middle part of the rear end cover (5) is provided with knurled straight anti-slip lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486850.XA CN110146656B (en) | 2019-06-05 | 2019-06-05 | Explosion-proof breathing device of gas detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910486850.XA CN110146656B (en) | 2019-06-05 | 2019-06-05 | Explosion-proof breathing device of gas detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110146656A CN110146656A (en) | 2019-08-20 |
| CN110146656B true CN110146656B (en) | 2020-06-05 |
Family
ID=67590503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910486850.XA Active CN110146656B (en) | 2019-06-05 | 2019-06-05 | Explosion-proof breathing device of gas detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110146656B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2852113A1 (en) * | 1977-12-09 | 1979-06-13 | Boyd | FLAME AND WEATHER RESISTANT COATING FOR AN ELECTRICAL DEVICE |
| CN201107153Y (en) * | 2007-09-18 | 2008-08-27 | 天津索思仪表测控系统技术有限公司 | Sensor explosion proof apparatus |
| CN201171058Y (en) * | 2007-12-14 | 2008-12-24 | 山西汾西重工有限责任公司 | Flame proof respiration apparatus for flame-proof type accumulator case |
| CN104269004A (en) * | 2014-10-24 | 2015-01-07 | 无锡格林通安全装备有限公司 | Explosion-proof sound alarm |
| CN104931673A (en) * | 2015-06-28 | 2015-09-23 | 哈尔滨东方报警设备开发有限公司 | Explosion-proof steel mesh respirator |
| CN106025903A (en) * | 2016-06-28 | 2016-10-12 | 河南平芝高压开关有限公司 | Switch device and protector for explosion-proof film of switch device |
| CN206479512U (en) * | 2017-01-24 | 2017-09-08 | 北京惟泰安全设备有限公司 | A kind of flame-proof type gas detector |
-
2019
- 2019-06-05 CN CN201910486850.XA patent/CN110146656B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2852113A1 (en) * | 1977-12-09 | 1979-06-13 | Boyd | FLAME AND WEATHER RESISTANT COATING FOR AN ELECTRICAL DEVICE |
| CN201107153Y (en) * | 2007-09-18 | 2008-08-27 | 天津索思仪表测控系统技术有限公司 | Sensor explosion proof apparatus |
| CN201171058Y (en) * | 2007-12-14 | 2008-12-24 | 山西汾西重工有限责任公司 | Flame proof respiration apparatus for flame-proof type accumulator case |
| CN104269004A (en) * | 2014-10-24 | 2015-01-07 | 无锡格林通安全装备有限公司 | Explosion-proof sound alarm |
| CN104931673A (en) * | 2015-06-28 | 2015-09-23 | 哈尔滨东方报警设备开发有限公司 | Explosion-proof steel mesh respirator |
| CN106025903A (en) * | 2016-06-28 | 2016-10-12 | 河南平芝高压开关有限公司 | Switch device and protector for explosion-proof film of switch device |
| CN206479512U (en) * | 2017-01-24 | 2017-09-08 | 北京惟泰安全设备有限公司 | A kind of flame-proof type gas detector |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110146656A (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110230776B (en) | Intelligent control box for gas pipeline | |
| CN213275508U (en) | Intelligent gas sensor assembly with multiple sampling modes | |
| CN110146656B (en) | Explosion-proof breathing device of gas detector | |
| CN206582894U (en) | A kind of combustion gas of burner point device of air | |
| CN210499880U (en) | Sealing clamp for airspeed tube | |
| CN212585909U (en) | Double-circuit sensor with clamping structure | |
| CN208282171U (en) | Connection structure and gas-cooker | |
| CN221325773U (en) | Pressure transmitter verification connector | |
| CN217688414U (en) | Ventilation degree sensing device | |
| CN220603708U (en) | Adsorption radon measuring device | |
| CN212408240U (en) | Air tap sealing cover suitable for high-pressure air storage device | |
| CN214929668U (en) | Error-proofing and sealing structure for single-diaphragm brake chamber | |
| CN219013600U (en) | Manometer connecting pipe | |
| CN218774163U (en) | Pipe coupling assembling based on atomizer for aerosol treatment | |
| CN218097727U (en) | Mining ann's type altimeter | |
| CN221054480U (en) | Gas conveying pipeline connecting assembly and gas conveying pipeline | |
| CN219038256U (en) | Air inlet connecting mechanism of pressure sensor | |
| CN209762317U (en) | combined ball valve | |
| CN217123041U (en) | Dustproof mechanism and top cover press-fitting device | |
| CN219975701U (en) | Cutting ferrule connector device for needle valve | |
| CN214277275U (en) | Air inlet passage total pressure pipe | |
| CN220542328U (en) | Integrated braking vacuum degree pressure sensor | |
| CN218267917U (en) | Sealing structure of ore separator blowing device | |
| CN208366485U (en) | A kind of low-cost digital thermometer | |
| CN215809348U (en) | Water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Li Zhengze Inventor after: Liu Mingxiao Inventor after: Zhou Qian Inventor after: Liu Yi Inventor after: Wei Wei Inventor after: Wang Caijun Inventor after: Bu Siyuan Inventor after: Shang Chao Inventor after: Hou Hairong Inventor before: Li Zhengze Inventor before: Hou Hairong Inventor before: Liu Mingxiao Inventor before: Zhou Qian Inventor before: Hu Jie Inventor before: Liu Yi Inventor before: Wei Wei Inventor before: Wang Caijun Inventor before: Bu Siyuan Inventor before: Shang Chao |