CN202916136U - Airtight sampling device - Google Patents
Airtight sampling device Download PDFInfo
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- CN202916136U CN202916136U CN 201220548805 CN201220548805U CN202916136U CN 202916136 U CN202916136 U CN 202916136U CN 201220548805 CN201220548805 CN 201220548805 CN 201220548805 U CN201220548805 U CN 201220548805U CN 202916136 U CN202916136 U CN 202916136U
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Abstract
The utility model discloses an airtight sampling device. The airtight sampling device comprises an airtight sampler and a sampling injector, wherein the airtight sampler comprises a sampler main body (1), a gas conduit (2) and a cut-off valve (3), wherein the sampling injector is inserted into the sampler main body (1) for sampling; the sampler main body (1) is connected with a gas conveying pipeline (5) through the gas conduit (2); the cut-off valve (3) is arranged on the gas conduit (2); the sampling injector is an airtight gas sampling injector (4) and comprises a needle cylinder (41), a piston (42), a needle head (43) and a piston limiter; the piston (42) is inserted into an opening in one end of the needle cylinder (41); the piston limiter is arranged in the opening; and a gas inlet is formed in the other end of the needle cylinder (41) and allows the needle head (43) to be inserted. The airtight sampling device disclosed by the utility model has the advantages of simple structure, long service life, low possibility of damage and favorable safety.
Description
Technical field
The utility model relates to sampling apparatus in a kind of oil, the chemical industry, and particularly, the utility model relates to the murder by poisoning medium enclosed sampling device in a kind of low pressure production system.
Background technology
Sampling apparatus is widespread use in petroleum chemical industry, be divided into high pressure production system sampling apparatus and low pressure production system sampling apparatus according to the different production operation pressure that it was suitable for, usually will be applicable to the sampling apparatus that production operation pressure is lower than 0.1Mpa and be called low pressure production system sampling apparatus, in the prior art, modal low pressure production system comprises gas extraction system and sulfur recovery system etc. in refinery solvent regeneration system, the sewage.Above-mentioned low pressure production system sampling apparatus generally is divided into two classes: non-closed sampler and closed sampler, though non-closed sampler is simple in structure but leakproofness is poor, unavoidably can produce loss of material and leakage, to the healthy generation harm of operating personnel, cause security threat simultaneously; Existing closed sampler uses the sampling rubber cushion to carry out airtight usually, its serviceable life is short easily causes leakage, and above-mentioned closed sampler uses with the sampling syringe usually, and sampling cylinder piston and syringe needle easily come off, and causes the situation generations such as toxic gas leakage and sample collector poisoning.In addition, existing closed sampler structure is too complicated, not only cost is high, running program is loaded down with trivial details, and the more and easy leakage of seal point, its seal member needs often to change, maintenance management and use operation are all pretty troublesome, such as the disclosed a kind of needle cylinder airtight sampler of Chinese utility model patent CN201749043U, its by with the threeway of thief hatch and sampling valve with the low pressure gas system, the sample export pipeline is connected with the sample inlet pipeline, but the complex structure of above-mentioned closed sampler, the sampling operation program is loaded down with trivial details, valve member seals point is many, easily leaks; Sampling thief seals by seal gasket, and aging the leakage easily occurs rubber cushion, needs periodic replacement, and maintenance workload is larger.
In addition, existing needle cylinder airtight sampler mainly adopts the syringe of simple glass material; the position limitation protection structure is not set, and the piston of syringe easily ejects, and syringe needle easily blocks the pin obscission; and the glass material syringe is easily pulverized, thereby causes toxic gas leakage.
In sum, existing closed sampler complex structure, the sampling operation program is loaded down with trivial details, leakage and material easily occurs frangible, and the healthy of operating personnel damaged, and can't satisfy the production requirement of modern enterprise increasingly stringent aspect safety and environmental protection.
The utility model content
The defectives such as in order to solve existing closed sampler complex structure, the sampling operation program is loaded down with trivial details, and easy generation leakage and material are frangible, the utility model provides a kind of enclosed sampling device, and it is simple in structure, can effectively prevent the medium leakage, long service life, cracky not, security is good.
A kind of enclosed sampling device that the utility model provides, it comprises closed sampler and sampling injector, described enclosed sampling device is characterised in that:
Described closed sampler comprises sampling thief main body 1, gas conduit 2, stop valve 3, described sampling injector inserts described sampling thief main body 1 with sampling, described gas conduit 2 is connected described sampling thief main body 1 with gas transmission pipeline 5, described stop valve 3 is arranged on the described gas conduit 2.
Described sampling injector is closed type gas sample syringe 4, it comprises syringe 41, piston 42, syringe needle 43, piston limit device, one end opening of described syringe 41 is to insert described piston 42 and the piston limit device is set, and the other end arranges air intake opening to insert syringe needle 43.
Described piston 42 comprises push rod 44, described piston limit device comprises bonnet 45, described bonnet 45 is set in the piston 42 insert ports outside of described syringe 41 and fixes by screw thread and syringe 41, and these bonnet 45 interior diameter holes identical with push rod 44 external diameters that arrange are to insert push rod 44 and spacing to piston 42.Described push rod 44 passes and can freely push or pull out from this hole, but the sectional area of piston 42 is larger, owing to bonnet 45 stops, can't eject, and can prevent from coming off.
Described closed type gas sample syringe 4 also comprises needle head fixer, and described needle head fixer comprises protecgulum 46, and it is set in outside the air intake opening of described syringe 41, and this protecgulum 46 is fixed by screw thread and this air intake opening, and the inside of described protecgulum 46 arranges pad 47.
Sheathed three sealing rings 48 of being made by the tetrafluoroethene material outside the end that described piston 42 inserts in the syringe 41 can keep the syringe good seal performance.
Described sampling thief main body 1 comprises base 11, gland 12 and rubber blanket 13.Rubber blanket 13 adopts proprietary material, such as special silicagel pad, compares with rubber cushion of the prior art, and its pliability is strong, and elasticity is high, and voltage endurance capability and sealing property are better, and be anti-aging, and long service life can repeatedly be used.After tested, adopt pin to do puncture experiment 100 times after, this rubber blanket 13 still can keep good seal performance at 0.5MPa pressure.Existing rubber cushion is easily aging under high temperature Exposure to Sunlight condition, and sample region is through repeatedly easily leaking after the acupuncture treatment.
One side opening of described base 11, it is inner to be the gas sampling space, its entrance and exit is connected with gas transmission pipeline 5 by gas conduit 2 respectively; Described rubber blanket 13 is positioned at described gland 12, and this rubber blanket 13 and this gland 12 are installed on described base 11 openings jointly with its sealing; Described sampling injector forms thieff hatch at this gland 12 and this rubber blanket 13 after passing described gland 12 and the described base 11 of described rubber blanket 13 insertions, screws in sealing screw 15 to seal above-mentioned thieff hatch.
The internal diameter of the external diameter of described rubber blanket 13 and described gland 12 is complementary to insert in this gland 12, to ensure the excellent sealing of poisonous gas sample space; Described gland 12 is connected by dismountable screw 16 with described base 11, to form airtight sample region.
Described sampling injector can repeatedly be sampled with identical or different thieff hatch on described sampling thief main body 1, can use respectively each thieff hatch, usually available sealing screw 15 carries out shutoff when this thieff hatch repeated puncture and after losing efficacy, and enable new thieff hatch, thereby prolong the life cycle of whole rubber blanket 13, reduce the frequency of changing this dangerous operation of rubber blanket.
Described gas conduit 2 comprises sampling thief induction pipe 21 and sampling thief outlet 22, and above-mentioned pipeline all adopts the stainless steel metal material to make; One end of described sampling thief induction pipe 21 is connected with the entrance of the base 11 of described sampling thief main body 1, its other end is connected with sample tap 14 in being installed on gas transmission pipeline 5, described sample tap 14 is positioned at gas transmission pipeline 5 centers, and this place's gas flow rate is very fast; One end of described sampling thief outlet 22 is connected with the outlet of the base 11 of described sampling thief main body 1, its other end inserts in the tube wall of gas transmission pipeline 5, the port that inserts is positioned at position, tube wall inside edge, apart from the about 5mm place of tube wall, gas flow rate is minimum herein, be beneficial to sampling thief internal bypass gas flow, and can form pressure reduction with sample tap 14, form certain bypass gas continuous flow at sampling thief.Described sampling thief induction pipe 21 be connected sampling thief outlet 22 and described sampling thief main body 1 base 11 be connected gas transmission pipeline 5 and adopt welding manners to be connected.
Described stop valve 3 is the DN15 stainless steel ball valve.The anglec of rotation is little, good seal performance, and switch is flexible, is convenient to control, and material corrosion resistance is difficult for getting rusty.Specification DN15 is the valve inside nominal diameter.
Described syringe 41 adopts pmma materials to make, and its outside semi-surrounding metal coating shell prevents from that syringe from colliding with to break poison gas into pieces and leak outside the accident that the sample collector is poisoned.
Identical with ordinary syringe, described air intake opening and described syringe 41 are the integral type structure, described syringe needle 43 inserts the air intake opening of described syringe 41 and passes protecgulum and is threaded to realize lock sealing with this air intake opening employing, avoid when sampling finishes rear withdrawal of needle operation, syringe needle comes off and causes poisoning dielectric leakage, causes the sample collector to poison.
A kind of enclosed sampling device provided by the utility model, it has following beneficial effect:
One, sampling thief adopts differential pressure sampling pin configuration, and institute's collected specimens is accurate, and is representative;
Two, the sampling rubber blanket is anti-aging, long service life, and good seal performance can repeatedly be used;
Three, sampling injector cylinder piston design position limiting structure prevents that piston push rod from ejecting, and syringe needle adopts the screwed connection form, can prevent effectively that it from coming off;
Four, sampling injector adopts the organic glass material, and the strength of materials is high, cracky not, and security is good.
Description of drawings
Fig. 1 is the schematic diagram of the closed sampler of enclosed sampling device of the present utility model, and the direction of arrow represents the media flow direction among the figure.
Fig. 2 is the schematic diagram of the gland of enclosed sampling device of the present utility model.
Fig. 3 is the schematic diagram of the closed type gas sample syringe of enclosed sampling device of the present utility model.
Fig. 4 is the schematic diagram of enclosed sampling device of the present utility model.
Description of reference numerals: 1-sampling thief, 2-gas conduit, 3-stop valve, 4-closed type gas sample syringe, 5-gas transmission pipeline, 11-base, 12-gland, 13-rubber blanket, 14-sample tap, 15-sealing screw, 16-screw, 21-sampling thief induction pipe, 22-sampling thief outlet, 41-syringe, 42-piston, 43-syringe needle, 44-push rod, 45-bonnet, 46-protecgulum, 47-pad, 48-sealing ring.
Embodiment
Below in conjunction with embodiment, further specify the utility model.
A kind of enclosed sampling device, it comprises closed sampler and sampling injector, described closed sampler comprises sampling thief main body 1, gas conduit 2, stop valve 3, described sampling injector inserts described sampling thief main body 1 with sampling, described gas conduit 2 is connected described sampling thief main body 1 with gas transmission pipeline 5, described stop valve 3 is arranged on the described gas conduit 2.
Described sampling injector is closed type gas sample syringe 4, it comprises syringe 41, piston 42, syringe needle 43, piston limit device, one end opening of described syringe 41 is to insert described piston 42 and the piston limit device is set, and the other end arranges air intake opening to insert syringe needle 43.
Described piston 42 comprises push rod 44, described piston limit device comprises bonnet 45, described bonnet 45 is set in the piston 42 insert ports outside of described syringe 41 and fixes by screw thread and syringe 41, and these bonnet 45 interior diameter holes identical with push rod 44 external diameters that arrange are to insert push rod 44 and spacing to piston 42.
Described closed type gas sample syringe 4 also comprises needle head fixer, and described needle head fixer comprises protecgulum 46, and it is set in outside the air intake opening of described syringe 41, and this protecgulum 46 is fixed by screw thread and this air intake opening, and the inside of described protecgulum 46 arranges pad 47.
Sheathed three sealing rings 48 of being made by the tetrafluoroethene material outside the end that described piston 42 inserts in the syringe 41 can keep the syringe good seal performance.
Described sampling thief main body 1 comprises base 11, gland 12 and rubber blanket 13.Rubber blanket 13 adopts proprietary material, such as special silicagel pad.
One side opening of described base 11, it is inner to be the gas sampling space, its entrance and exit is connected with gas transmission pipeline 5 by gas conduit 2 respectively; Described rubber blanket 13 is positioned at described gland 12, and this rubber blanket 13 and this gland 12 are installed on described base 11 openings jointly with its sealing; Described sampling injector forms thieff hatch at this gland 12 and this rubber blanket 13 after passing described gland 12 and the described base 11 of described rubber blanket 13 insertions, screws in sealing screw 15 to seal above-mentioned thieff hatch.
The internal diameter of the external diameter of described rubber blanket 13 and described gland 12 is complementary to insert in this gland 12, to ensure the excellent sealing of poisonous gas sample space; Described gland 12 is connected by dismountable screw 16 with described base 11, to form airtight sample region.
Described gas conduit 2 comprises sampling thief induction pipe 21 and sampling thief outlet 22, and above-mentioned pipeline all adopts the stainless steel metal material to make; One end of described sampling thief induction pipe 21 is connected with the entrance of the base 11 of described sampling thief main body 1, its other end is connected with sample tap 14 in being installed on gas transmission pipeline 5, described sample tap 14 is positioned at gas transmission pipeline 5 centers, and this place's gas flow rate is very fast; One end of described sampling thief outlet 22 is connected with the outlet of the base 11 of described sampling thief main body 1, its other end inserts in the tube wall of gas transmission pipeline 5, the port that inserts is positioned at position, tube wall inside edge, apart from the about 5mm place of tube wall, gas flow rate is minimum herein, be beneficial to sampling thief internal bypass gas flow, and can form pressure reduction with sample tap 14, form certain bypass gas continuous flow at sampling thief.Described sampling thief induction pipe 21 be connected sampling thief outlet 22 and described sampling thief main body 1 base 11 be connected gas transmission pipeline 5 and adopt welding manners to be connected.
Described stop valve 3 is the DN15 stainless steel ball valve.Described syringe 41 adopts pmma materials to make, and its outside semi-surrounding metal coating shell prevents from that syringe from colliding with to break poison gas into pieces and leak outside the accident that the sample collector is poisoned.Described air intake opening and described syringe 41 are the integral type structure, and described syringe needle 43 inserts the air intake opening of described syringe 41 and passes protecgulum and is threaded to realize lock sealing with this air intake opening employing.
Claims (10)
1. enclosed sampling device, it comprises closed sampler and sampling injector, described enclosed sampling device is characterised in that:
Described closed sampler comprises sampling thief main body (1), gas conduit (2), stop valve (3), described sampling injector inserts described sampling thief main body (1) with sampling, described gas conduit (2) is connected described sampling thief main body (1) with gas transmission pipeline (5), described stop valve (3) is arranged on the described gas conduit (2);
Described sampling injector is closed type gas sample syringe (4), it comprises syringe (41), piston (42), syringe needle (43), piston limit device, one end opening of described syringe (41) is to insert described piston (42) and the piston limit device is set, and the other end arranges air intake opening to insert syringe needle (43).
2. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described piston (42) comprises push rod (44), described piston limit device comprises bonnet (45), described bonnet (45) is set in piston (42) the insert port outside of described syringe (41) and fixes by screw thread and syringe (41), the diameter hole identical with push rod (44) external diameter is set to insert push rod (44) and spacing to piston (42) in this bonnet (45).
3. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described closed type gas sample syringe (4) also comprises needle head fixer, described needle head fixer comprises protecgulum (46), it is set in outside the air intake opening of described syringe (41), and this protecgulum (46) is fixed by screw thread and this air intake opening, and the inside of described protecgulum (46) arranges pad (47).
4. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described piston (42) inserts sheathed three sealing rings of being made by the tetrafluoroethene material (48) outside the interior end of syringe (41).
5. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described sampling thief main body (1) comprises base (11), gland (12) and rubber blanket (13);
One side opening of described base (11), it is inner to be the gas sampling space, its entrance and exit is connected with gas transmission pipeline (5) by gas conduit (2) respectively;
Described rubber blanket (13) is positioned at described gland (12), and this rubber blanket (13) and this gland (12) are installed on described base (11) opening jointly with its sealing;
Described sampling injector passes described gland (12) and described rubber blanket (13) inserts described base (11) afterwards at this gland (12) and this rubber blanket (13) formation thieff hatch, screws in sealing screw (15) to seal above-mentioned thieff hatch.
6. a kind of enclosed sampling device according to claim 5 is characterized in that:
The internal diameter of the external diameter of described rubber blanket (13) and described gland (12) is complementary to insert in this gland (12);
Described gland (12) is connected by dismountable screw (16) with described base (11).
7. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described gas conduit (2) comprises sampling thief induction pipe (21) and sampling thief outlet (22), and above-mentioned pipeline all adopts the stainless steel metal material to make;
One end of described sampling thief induction pipe (21) is connected with the entrance of the base (11) of described sampling thief main body (1), its other end sample tap (14) interior with being installed on gas transmission pipeline (5) is connected, and described sample tap (14) is positioned at gas transmission pipeline (5) center;
One end of described sampling thief outlet (22) is connected with the outlet of the base (11) of described sampling thief main body (1), and its other end inserts in the tube wall of gas transmission pipeline (5);
Described sampling thief induction pipe (21) be connected sampling thief outlet (22) and described sampling thief main body (1) base (11) be connected gas transmission pipeline (5) and adopt welding manner to be connected.
8. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described stop valve (3) is the DN15 stainless steel ball valve.
9. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described syringe (41) adopts pmma material to make, its outside semi-surrounding metal coating shell;
Described air intake opening and described syringe (41) are the integral type structure, and described syringe needle (43) inserts the air intake opening of described syringe (41) and passes protecgulum and is threaded with this air intake opening employing.
10. a kind of enclosed sampling device according to claim 1 is characterized in that:
Described piston (42) comprises push rod (44), described piston limit device comprises bonnet (45), described bonnet (45) is set in piston (42) the insert port outside of described syringe (41) and fixes by screw thread and syringe (41), the diameter hole identical with push rod (44) external diameter is set to insert push rod (44) and spacing to piston (42) in this bonnet (45);
Described closed type gas sample syringe (4) also comprises needle head fixer, described needle head fixer comprises protecgulum (46), it is set in outside the air intake opening of described syringe (41), and this protecgulum (46) is fixed by screw thread and this air intake opening, and the inside of described protecgulum (46) arranges pad (47);
Described piston (42) inserts sheathed three sealing rings of being made by the tetrafluoroethene material (48) outside the interior end of syringe (41);
Described sampling thief main body (1) comprises base (11), gland (12) and rubber blanket (13);
One side opening of described base (11), it is inner to be the gas sampling space, its entrance and exit is connected with gas transmission pipeline (5) by gas conduit (2) respectively;
Described rubber blanket (13) is positioned at described gland (12), and this rubber blanket (13) and this gland (12) are installed on described base (11) opening jointly with its sealing;
Described sampling injector passes described gland (12) and described rubber blanket (13) inserts described base (11) afterwards at this gland (12) and this rubber blanket (13) formation thieff hatch, screws in sealing screw (15) to seal above-mentioned thieff hatch;
The internal diameter of the external diameter of described rubber blanket (13) and described gland (12) is complementary to insert in this gland (12);
Described gland (12) is connected by dismountable screw (16) with described base (11);
Described gas conduit (2) comprises sampling thief induction pipe (21) and sampling thief outlet (22), and above-mentioned pipeline all adopts the stainless steel metal material to make;
One end of described sampling thief induction pipe (21) is connected with the entrance of the base (11) of described sampling thief main body (1), its other end sample tap (14) interior with being installed on gas transmission pipeline (5) is connected, and described sample tap (14) is positioned at gas transmission pipeline (5) center;
One end of described sampling thief outlet (22) is connected with the outlet of the base (11) of described sampling thief main body (1), and its other end inserts in the tube wall of gas transmission pipeline (5), and the port of insertion is apart from tube wall 5mm;
Described sampling thief induction pipe (21) be connected sampling thief outlet (22) and described sampling thief main body (1) base (11) be connected gas transmission pipeline (5) and adopt welding manner to be connected;
Described stop valve (3) is the DN15 stainless steel ball valve;
Described syringe (41) adopts pmma material to make, its outside semi-surrounding metal coating shell;
Described air intake opening and described syringe (41) are the integral type structure, and described syringe needle (43) inserts the air intake opening of described syringe (41) and passes protecgulum and is threaded with this air intake opening employing.
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| CN 201220548805 CN202916136U (en) | 2012-10-24 | 2012-10-24 | Airtight sampling device |
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| CN 201220548805 CN202916136U (en) | 2012-10-24 | 2012-10-24 | Airtight sampling device |
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| CN103712833A (en) * | 2014-01-20 | 2014-04-09 | 北京大学 | Ordinary pressure sampling device suitable for lower pressure environments in high altitude areas |
| CN104198229A (en) * | 2014-09-03 | 2014-12-10 | 中国科学院植物研究所 | Gas sampling injector |
| CN104266883A (en) * | 2014-10-15 | 2015-01-07 | 李尚国 | Portable manual gas sampling cylinder |
| CN104777069A (en) * | 2015-03-17 | 2015-07-15 | 浙江理工大学 | Powdery substance processing device |
| CN104819909A (en) * | 2015-03-17 | 2015-08-05 | 浙江理工大学 | Equipment for metering medicinal powder heating mass loss rate |
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| CN104198229A (en) * | 2014-09-03 | 2014-12-10 | 中国科学院植物研究所 | Gas sampling injector |
| CN104266883A (en) * | 2014-10-15 | 2015-01-07 | 李尚国 | Portable manual gas sampling cylinder |
| CN104777069A (en) * | 2015-03-17 | 2015-07-15 | 浙江理工大学 | Powdery substance processing device |
| CN104819909A (en) * | 2015-03-17 | 2015-08-05 | 浙江理工大学 | Equipment for metering medicinal powder heating mass loss rate |
| CN108204910A (en) * | 2016-12-16 | 2018-06-26 | 中国石油化工股份有限公司 | A kind of water cooler sampler and sampling method |
| CN107824231B (en) * | 2017-09-22 | 2020-10-20 | 河南大学 | Experimental device for be used for saving liquid isotope trade sample |
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| CN108593370A (en) * | 2018-06-26 | 2018-09-28 | 中国科学院东北地理与农业生态研究所 | The bleeder sample bottle and its application process measured for carbon stable isotope in carbon dioxide |
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| CN110926873A (en) * | 2019-12-25 | 2020-03-27 | 中国航空工业集团公司西安飞机设计研究所 | Abnormal shape cavity sampling structure |
| CN110926873B (en) * | 2019-12-25 | 2022-09-20 | 中国航空工业集团公司西安飞机设计研究所 | Abnormal shape cavity sampling structure |
| CN111397975A (en) * | 2020-04-13 | 2020-07-10 | 山东省生态环境规划研究院 | Automatic butt-joint and sealing gas sampling device |
| CN111366423A (en) * | 2020-04-22 | 2020-07-03 | 济南大学 | Device for collecting soil breathing gas and gas collecting method |
| CN112729954A (en) * | 2020-12-30 | 2021-04-30 | 乔印亚 | Mid-course sampling detection device for white spirit fermentation and white spirit production process |
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