CN102213211A - Gas-sampling diaphragm pump - Google Patents
Gas-sampling diaphragm pump Download PDFInfo
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- CN102213211A CN102213211A CN2011101576965A CN201110157696A CN102213211A CN 102213211 A CN102213211 A CN 102213211A CN 2011101576965 A CN2011101576965 A CN 2011101576965A CN 201110157696 A CN201110157696 A CN 201110157696A CN 102213211 A CN102213211 A CN 102213211A
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- hole
- pump
- shroud
- cover plate
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- Reciprocating Pumps (AREA)
Abstract
The invention relates to a gas-sampling diaphragm pump. A rear cover plate is fixedly installed on the side wall of a pump base, a front cover plate is fixed on the side wall of the rear cover plate, a gas source mouthpiece and a sampling mouthpiece are installed on the rear cover plate, and a pump diaphragm is arranged between the rear cover plate and the front cover plate; and a first rear through hole and a second rear through hole are arranged in the rear cover plate, and a first front through hole and a second front through hole are arranged in the front cover plate; a bowl-shaped leather sheath is hermetically sleeved and connected with the rear cover plate and the front cover plate and defines a communication cavity with the front cover plate; an oscillating arm is hinged on the pump base; the diameter of the rear end part of the first front through hole is larger than that of the front end part of the first rear through hole, and the diameter of the rear end part of the second front through hole is smaller than that of the front end part of the second rear through hole; the width of the pump diaphragm at the rear end part of the first front through hole is slightly larger than that of the rear end part of the first front through hole, and the width of the pump diaphragm at the front end part of the second rear through hole is slightly larger than that of the front end part of the second rear through hole. According to the gas-sampling diaphragm pump provided by the invention, sampled gas cannot be polluted, and no electric spark is generated, therefore, the pump can be used in explosion-proof and hazardous areas.
Description
Technical field
The present invention relates to a kind of sampling apparatus of long-range pipeline gas, especially a kind of barrier film gas samping pump.
Background technique
Current a lot of oil, chemical industry, for the safety of producing, all gas leakage detection instrument is being installed, but some emphasis check point, safe place, personnel can't reach, instrument can't be installed, such as oil tank slit, the medium place of trench, apparatus of the present invention can be delivered to detected gas in the measuring instrument fast fast and analyze, handle, and make the staff monitor test environment away from the hazardous location and take necessary emergency measure.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of can contamination sampling gas, sampling Safety performance height, can use barrier film gas samping pump in explosion-proof deathtrap.
According to technological scheme provided by the invention, described barrier film gas samping pump, be included in hard-wired back shroud on the sidewall of pump seat, sidewall at back shroud is installed with front shroud, gas source interface pipe and sampling mouthpiece are installed on back shroud, between back shroud and front shroud, be provided with pump diaphragm, on back shroud, offer the first back through hole and the second back through hole, the gas source interface pipe is communicated with the first back through hole, the sampling mouthpiece is communicated with the second back through hole, through hole before the through hole and second before on front shroud, offering first, the first preceding through hole and the first back through hole selectivity are communicated with, and the second preceding through hole and the second back through hole selectivity are communicated with; Be connected to bowl-shape leather sheath at back shroud and front shroud outer seal sleeve, bowl-shape leather sheath and front shroud surround communicated cavity, are hinged with swing arm on pump seat, and swing arm links to each other with bowl-shape leather sheath; And the rearward end diameter of through hole is greater than the front end diameter of the first back through hole before first, and the rearward end diameter of the second preceding through hole is less than the front end diameter of the second back through hole; The pump diaphragm width of through hole back-end portion is slightly larger than the diameter of through hole back-end portion before first before first, is slightly larger than the diameter of the second back through hole front end at the pump diaphragm width of the second back through hole front end.
Bottom in swing arm is equipped with magnet piece.Between pump seat and back shroud, be provided with packing ring.
The present invention compares with the traditional sampling device, and it has overcome in the conventional apparatus pump housing will use oil lubrication, and lubricant oil volatilizees easily, and sample gas is polluted, and can influence the judgement of back surface detector instrument.Device of the present invention, it adopts the device of diaphragm can not produce volatilization.Apparatus of the present invention are to-and-fro motion under the effect of electromagnetic force, can not produce electrical spark, can use in explosion-proof deathtrap.
Description of drawings
Fig. 1 is an overall structure schematic representation of the present invention.
Embodiment
The invention will be further described below in conjunction with concrete drawings and Examples.
As shown in the figure: this barrier film gas samping pump, be included in hard-wired back shroud 7 on the sidewall of pump seat 1, sidewall at back shroud 7 is installed with front shroud 4, gas source interface pipe 10 and sampling mouthpiece 11 are installed on back shroud 7, between back shroud 7 and front shroud 4, be provided with pump diaphragm 5, on back shroud 7, offer the first back through hole 7.1 and the second back through hole 7.2, gas source interface pipe 10 is communicated with the first back through hole 7.1, sampling mouthpiece 11 is communicated with the second back through hole 7.2, through hole 4.2 before the through hole 4.1 and second before on front shroud 4, offering first, through hole 4.1 is communicated with first back through hole 7.1 selectivity before first, and the second preceding through hole 4.2 and second back through hole 7.2 selectivity are communicated with; Be connected to bowl-shape leather sheath 3 by band 6 stuffing box glands outside back shroud 7 and front shroud 4, bowl-shape leather sheath 3 surrounds communicated cavity 12 with front shroud 4, is hinged with swing arm 2 on pump seat 1, and swing arm 2 links to each other with bowl-shape leather sheath 3; And the rearward end diameter of through hole 4.1 is greater than the front end diameter of the first back through hole 7.1 before first, and the rearward end diameter of the second preceding through hole 4.2 is less than the front end diameter of the second back through hole 7.2; Pump diaphragm 5 width of through hole 4.1 rearward end are slightly larger than the diameter of through hole 4.1 rearward end before first before first, are slightly larger than the diameter of second back through hole 7.2 front ends at pump diaphragm 5 width of second back through hole 7.2 front ends.
In the bottom of swing arm 2 magnet piece 13 is installed, the swing arm 2 that adds magnet piece 13 under the electromagnetic field effect that constantly changes, swing.Between pump seat 1 and back shroud 7, be provided with packing ring 8.
Pump diaphragm 5 width of through hole 4.1 rearward end are slightly larger than the diameter of through hole 4.1 rearward end before first before first, make when swing arm 2 is swung forward, pump diaphragm 5 deformation and before first through hole 4.1 rearward end projecting inward, through hole 4.1 afterwards can be communicated with between the through hole 7.1 with first before first; When swing arm 2 is swung backward, before partly recovering to make and win, pump diaphragm 5 deformation are not communicated with between the through hole 7.1 behind the through hole 4.1 and first.
Be slightly larger than the diameter of second back through hole 7.2 front ends at pump diaphragm 5 width of second back through hole 7.2 front ends, make when swing arm 2 is swung backward, pump diaphragm 5 deformation are also projecting inward to second back through hole 7.2 front ends, can be communicated with between the second preceding through hole 4.2 and the second back through hole 7.2; When swing arm 2 was swung forward, pump diaphragm 5 deformation partly recovered to make and are not communicated with between the second preceding through hole 4.2 and the second back through hole 7.2.
During work, gas source interface pipe 10 inserts gas source pipe, sampling mouthpiece 11 inserts sampling conduit, when swing arm 2 is swung forward, it is big that communicated cavity 12 spaces become, air pressure reduces, make pump diaphragm 5 deformation and before first through hole 4.1 rearward end projecting inward, be communicated with between the through hole 7.1 behind the through hole 4.1 and first before first, and be not communicated with between the through hole 7.2 behind the through hole 4.2 and second before second, this moment, source of the gas gas can enter in the communicated cavity 12 by gas source interface pipe 10, the first back through hole, 7.1, the first preceding through hole 4.1; When making that swing arm 2 is swung backward, communicated cavity 12 spaces diminish, air pressure falls greatly, make pump diaphragm 5 deformation and projecting inward to second back through hole 7.2 front ends, be communicated with between the through hole 7.2 behind the through hole 4.2 and second before second, and be not communicated with between the through hole 7.1 behind the through hole 4.1 and first before first, the gas that enters communicated cavity 12 enters in the sampling mouthpiece 11 by the second preceding through hole 4.2, the second back through hole 7.2, realizes gas sampling.
Claims (3)
1. barrier film gas samping pump, it is characterized in that: be included in hard-wired back shroud (7) on the sidewall of pump seat (1), sidewall at back shroud (7) is installed with front shroud (4), gas source interface pipe (10) and sampling mouthpiece (11) are installed on back shroud (7), between back shroud (7) and front shroud (4), be provided with pump diaphragm (5), on back shroud (7), offer the first back through hole (7.1) and the second back through hole (7.2), gas source interface pipe (10) is communicated with the first back through hole (7.1), sampling mouthpiece (11) is communicated with the second back through hole (7.2), through hole (4.2) before the through hole (4.1) and second before on front shroud (4), offering first, through hole (4.1) is communicated with first back through hole (7.1) selectivity before first, and the second preceding through hole (4.2) and second back through hole (7.2) selectivity are communicated with; Be connected to bowl-shape leather sheath (3) at back shroud (7) and front shroud (4) outer seal sleeve, bowl-shape leather sheath (3) surrounds communicated cavity (12) with front shroud (4), is hinged with swing arm (2) on pump seat (1), and swing arm (2) links to each other with bowl-shape leather sheath (3); And the rearward end diameter of through hole (4.1) is greater than the front end diameter of the first back through hole (7.1) before first, and the rearward end diameter of the second preceding through hole (4.2) is less than the front end diameter of the second back through hole (7.2); Pump diaphragm (5) width of through hole before first (4.1) rearward end is slightly larger than the diameter of through hole (4.1) rearward end before first, is slightly larger than the diameter of second back through hole (7.2) front end at pump diaphragm (5) width of second back through hole (7.2) front end.
2. barrier film gas samping pump as claimed in claim 1 is characterized in that: in the bottom of swing arm (2) magnet piece (13) is installed.
3. barrier film gas samping pump as claimed in claim 1 is characterized in that: be provided with packing ring (8) between pump seat (1) and back shroud (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101576965A CN102213211A (en) | 2011-06-13 | 2011-06-13 | Gas-sampling diaphragm pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101576965A CN102213211A (en) | 2011-06-13 | 2011-06-13 | Gas-sampling diaphragm pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102213211A true CN102213211A (en) | 2011-10-12 |
Family
ID=44744674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101576965A Pending CN102213211A (en) | 2011-06-13 | 2011-06-13 | Gas-sampling diaphragm pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102213211A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2809589A (en) * | 1955-03-11 | 1957-10-15 | Chalmers H Randolph | Electro-magnetically operated pump |
| US3814552A (en) * | 1973-04-17 | 1974-06-04 | Atomic Energy Commission | Personal air sampling pump |
| CN87212875U (en) * | 1987-11-20 | 1988-10-05 | 核工业部辐射防护研究所 | Low flow diaphragm pump |
| JPH08233698A (en) * | 1995-02-23 | 1996-09-13 | Horiba Ltd | Sampling device for analyzer |
| CN2799901Y (en) * | 2005-06-20 | 2006-07-26 | 常熟市矿山机电器材有限公司 | Bidirectional diaphragm pump |
| CN101710035A (en) * | 2009-11-19 | 2010-05-19 | 武汉市天虹仪表有限责任公司 | Smoke dust sampling instrument |
| CN202176494U (en) * | 2011-06-13 | 2012-03-28 | 无锡格林通安全装备有限公司 | Diaphragm sampling pump |
-
2011
- 2011-06-13 CN CN2011101576965A patent/CN102213211A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2809589A (en) * | 1955-03-11 | 1957-10-15 | Chalmers H Randolph | Electro-magnetically operated pump |
| US3814552A (en) * | 1973-04-17 | 1974-06-04 | Atomic Energy Commission | Personal air sampling pump |
| CN87212875U (en) * | 1987-11-20 | 1988-10-05 | 核工业部辐射防护研究所 | Low flow diaphragm pump |
| JPH08233698A (en) * | 1995-02-23 | 1996-09-13 | Horiba Ltd | Sampling device for analyzer |
| CN2799901Y (en) * | 2005-06-20 | 2006-07-26 | 常熟市矿山机电器材有限公司 | Bidirectional diaphragm pump |
| CN101710035A (en) * | 2009-11-19 | 2010-05-19 | 武汉市天虹仪表有限责任公司 | Smoke dust sampling instrument |
| CN202176494U (en) * | 2011-06-13 | 2012-03-28 | 无锡格林通安全装备有限公司 | Diaphragm sampling pump |
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| PB01 | Publication | ||
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Application publication date: 20111012 |