CN113029711A - Automatic gas sampling device - Google Patents
Automatic gas sampling device Download PDFInfo
- Publication number
- CN113029711A CN113029711A CN202110331348.9A CN202110331348A CN113029711A CN 113029711 A CN113029711 A CN 113029711A CN 202110331348 A CN202110331348 A CN 202110331348A CN 113029711 A CN113029711 A CN 113029711A
- Authority
- CN
- China
- Prior art keywords
- sample bag
- guide slot
- wheel set
- traction transmission
- transmission wheel
- 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.)
- Pending
Links
- 238000005070 sampling Methods 0.000 title claims abstract description 30
- 238000005520 cutting process Methods 0.000 claims abstract description 58
- 239000000178 monomer Substances 0.000 claims abstract description 39
- 238000000926 separation method Methods 0.000 claims abstract description 18
- 239000004816 latex Substances 0.000 claims abstract description 13
- 229920000126 latex Polymers 0.000 claims abstract description 13
- 238000005507 spraying Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims description 37
- 239000012943 hotmelt Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000007789 gas Substances 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004868 gas analysis Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 102100025490 Slit homolog 1 protein Human genes 0.000 description 1
- 101710123186 Slit homolog 1 protein Proteins 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an automatic gas sampling device, which comprises a sample bag belt and a collecting device, wherein the sample bag belt is formed by connecting a plurality of sample bag monomers end to end; a separation cutting knife is arranged above the second guide slot, a first photoelectric positioner and an opening cutting knife are arranged at the second guide slot, and a second photoelectric positioner and a spraying head are arranged at the third guide slot; the suction sampling clamp comprises an upper clamp body and a lower clamp body, a micropore latex plate is arranged on the clamping surface of the upper clamp body and the clamping surface of the lower clamp body, a cavity communicated with micropores is formed in the micropore latex plate, and the cavity is communicated with the air pump. The device simple structure can supply power with modes such as photovoltaic, wind-force, battery, uses in the open air for a long time.
Description
Technical Field
The invention belongs to the technical field of agriculture and forestry production and scientific research equipment, and particularly relates to an automatic gas sampling device.
Background
Gas is one of the most common states ubiquitous in our productive life. For production research needs, the analysis of the composition of gases in specific areas is a common basic task. In agriculture and forestry production, gas sampling and analysis work is common in both fields and greenhouses. The basic information that we need to know includes the gas composition at the determined time point of the determined region, the gas composition change of the determined region over a period of time, etc. In fact, the gas analysis instruments meeting the above work are very many, the technology is mature, and the application popularization degree is high. However, the existing equipment has some disadvantages, such as high equipment cost and unsuitability for long-term outdoor use. For example, personnel participation is needed, and the automation degree is low. In addition, the gas analysis equipment with automated sampling is often very costly, is only suitable for scientific research work, and cannot be generally used in conventional production. Therefore, economic benefits of production are influenced to a certain extent, and effective investigation and evidence obtaining work cannot be carried out after accidents (such as serious air pollution, accidental dangerous gas leakage and the like) occur.
Disclosure of Invention
The invention provides an automatic gas sampling device which is suitable for outdoor use and well solves the problems in the background technology.
The technical scheme of the invention is as follows: an automatic gas sampling device comprises a sample bag belt formed by connecting a plurality of sample bag monomers end to end, wherein each sample bag monomer is provided with a positioning hole, the interior of the sample bag monomer is in a vacuum state, the head parts of the sample bag monomers are communicated and fixed with a gas guide pipe, and the end parts, far away from the sample bag monomer, of the gas guide pipes are closed; two parallel cutting seams are precut between any two adjacent sample bag monomers on the sample bag monomer belt, the two cutting seams penetrate through the sample bag monomer belt along the width direction, one cutting seam is an opening cutting seam, and the other cutting seam is a monomer separation cutting seam;
the device comprises a belt bin, a first traction transmission wheel set, a first guide slot, a second traction transmission wheel set, a second guide slot, a third traction transmission wheel set, a third guide slot, a fourth traction transmission wheel set and a suction sampling clamp which are sequentially arranged from left to right; the first traction transmission wheel set, the second traction transmission wheel set, the third traction transmission wheel set and the fourth traction transmission wheel set are identical in structure and transmission or guide direction and respectively comprise two guide wheels which are oppositely arranged up and down, wherein one guide wheel is a driving wheel, the other guide wheel is a driven wheel, wheel surfaces of the driving wheel and the driven wheel are attached to each other, the sample bag belt is clamped, and the sample bag belt is subjected to traction transmission from left to right in the rotating process; the first guide slot, the second guide slot and the third guide slot respectively comprise a channel through which a sample bag belt can pass and can limit the sample bag belt in shape;
a separating and cutting knife is arranged above the second guide slot, and the shape and the length of the separating and cutting knife are matched with those of the single separating and cutting slot; a first photoelectric positioner is arranged at the second guide slot, and the first photoelectric positioner is used for monitoring the positioning holes on the single body of the sample bag to judge whether the single body separation cutting seam is aligned with the separation cutting knife up and down;
an opening cutting knife is arranged above the third guide slot, and the shape and the length of the opening cutting knife are matched with those of an opening cutting seam; a second photoelectric positioner is arranged at the third guide crack, and the second photoelectric positioner is used for monitoring a positioning hole on the single sample bag body to judge whether the separation cutting crack of the single sample bag body is vertically aligned with the opening cutting knife or not; the third guide slot is also provided with a spray head, and the spray head is used for spraying codes on the sample bag monomer;
the suction sampling clamp comprises an upper clamp body and a lower clamp body, a micropore latex plate is arranged on the clamping surface of the upper clamp body and the lower clamp body, micropores are formed in the micropore latex plate, a cavity communicated with the micropores is formed in the micropore latex plate, and the cavity is communicated with an air pump.
Further: and a hot melting sealer is arranged at the suction sampling clamp and is used for carrying out hot melting sealing on the end part of the air guide pipe far away from the sample bag.
Further: the size of the micropores formed in the microporous latex plate is 0.2mm to 0.5 mm.
Has the advantages that: the scheme provides an automatic gas sampling device which is simple in structure, and only needs to complete sample bag belt loading and sample recovery in a sample bin manually; the electric energy consumption is low, the power can be supplied by photovoltaic, wind power, storage batteries and the like, and the solar photovoltaic solar storage battery can be used outdoors for a long time; the sample bag is provided with a code spraying mark, and the time sequence tracing analysis can be conveniently realized according to the code spraying.
Drawings
FIG. 1 is a schematic view of a sample strip of the present invention;
fig. 2 is a schematic diagram of the structure of the gas sampling device in the present invention.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
as shown in fig. 1 and 2, the invention discloses an automatic gas sampling device, which comprises a sample bag belt 2 formed by connecting a plurality of sample bag monomers 1a end to end, wherein each sample bag monomer 1a is provided with a positioning hole 1a-1, the interior of the sample bag monomer 1a is in a vacuum state, the head part of the sample bag monomer 1a is communicated and fixed with a gas guide tube 1b, and the end part of the gas guide tube 1b far away from the sample bag monomer 1a is closed; two parallel cutting seams are precut between any two adjacent sample bag monomers 1a on the sample bag belt 2, the two cutting seams penetrate along the width direction of the sample bag belt 2, one cutting seam is an opening cutting seam 1a, and the other cutting seam is a monomer separation cutting seam 2 b. It should be noted that: according to the connection state of the air duct 1b and the sample bag single body 1a, the single body separation cutting seam 2b is a straight line, but the opening cutting seam 1a is a bending line similar to a computer rectangular clock, and the specific shape is shown in fig. 1.
The device also comprises a collecting device, wherein the collecting device comprises a belt bin 3, a first traction transmission wheel set 41, a first guide slot 51, a second traction transmission wheel set 42, a second guide slot 52, a third traction transmission wheel set 43, a third guide slot 53, a fourth traction transmission wheel set 44 and a suction sampling clamp 9 which are sequentially arranged from left to right; the first traction transmission wheel set 41, the second traction transmission wheel set 42, the third traction transmission wheel set 43 and the fourth traction transmission wheel set 44 have the same structure and transmission or guide direction, and each traction transmission wheel set comprises two guide wheels which are oppositely arranged up and down, wherein one guide wheel is a driving wheel, the other guide wheel is a driven wheel, wheel surfaces of the driving wheel and the driven wheel are attached to clamp the sample bag belt 2, and the sample bag belt 2 is subjected to traction transmission from left to right in the rotating process; the first guide slot 51, the second guide slot 52 and the third guide slot 53 each comprise a passage through which the sample bag strip 2 can pass and which can limit the position and shape of the sample bag strip 2.
A separating cutting knife 61 is installed above the second guide slot 52, and the separating cutting knife 61 is matched with the single separating cutting seam 2b in shape and length; the second guide slot 52 is provided with a first photoelectric positioner 71, and the first photoelectric positioner 71 is used to monitor the positioning hole 1a-1 on the sample bag single body 1a to determine whether the single body separation cutting seam 2b is aligned with the separation cutting knife 61 up and down.
An opening cutting knife 62 is arranged above the third guide slot 53, and the opening cutting knife 62 is matched with the opening cutting slit 1a in shape and length; a second photoelectric positioner 72 is arranged at the third guide crack, and the second photoelectric positioner 72 is utilized to monitor the positioning hole 1a-1 on the single sample bag body so as to judge whether the separation cutting crack of the single sample bag body 1a is vertically aligned with the opening cutting knife 62; the third guide slot 53 is further provided with a spraying head 8, and the spraying head 8 is used for spraying codes on the sample bag single bodies 1 a.
The suction sampling clamp 9 comprises an upper clamp 9a and a lower clamp 9b, a microporous latex plate 10 is arranged on the clamping surface of the upper clamp 9a and the lower clamp 9b, micropores of 0.2mm to 0.5mm are formed in the microporous latex plate 10, a cavity communicated with the micropores is formed in the microporous latex plate 10, and the cavity is communicated with an air suction pump. And a hot-melt sealer 11 is arranged at the suction sampling clamp 9 and is used for carrying out hot-melt sealing on the end part of the air guide pipe 1b far away from the sample bag monomer 1a by utilizing the hot-melt sealer 11.
The sample bag monomer 1a is formed by pressing a polytetrafluoroethylene material film with the thickness of 0.05-0.5 mm. The length of the sample bag belt 2 is determined as required. The specific implementation mode is as follows: the first traction transmission wheel set 41 compresses the sample bag belt 2 and transmits the sample bag belt from left to right along the X-axis (horizontal) direction under the driving of the driving motor. The sample bag belt 2 is limited and restricted as necessary by the inherent shape of the first guide slot 51, preventing blocking, wandering and jamming. After the sample bag belt 2 has passed through the passage of the first guide slot 51, the second traction transport wheel set 42 continues to press the sample bag belt 2 and rotates at the same angle as the first traction transport wheel set 41, driving the sample bag belt 2 to continue its transport movement in the X-axis direction.
When the positioning hole 1a-1 on the sample bag monomer 1a is just in the unknown detection of the first photoelectric positioner 71, the separation cutting knife 61 and the monomer separation cutting line on the sample bag monomer 1a are overlapped up and down. At this time, the control system drives the separation cutting blade 61 to fall, and the separation of the sample bag monomer 1a from the sample bag belt 2 is completed. The separated and cut sample bag single body 1a is continuously conveyed from left to right along the X axis under the action of the second traction conveying wheel group 42. When the second photoelectric positioner 72 sends a signal after detecting the positioning hole 1a-1 on the sample bag single body 1a, the spraying head 8 sprays an identification code on the sample bag single body 1 a. At this time, the slit 1a coincides with the vertical position of the slit cutter 62. The control system drives the opening cutting knife 62 to complete the cutting along the opening cutting slit 1 a. The thick note is: the air duct 1b is still connected to the outside, but the sample bag unit 1a is still in a collapsed state.
Under the action of the fourth driving transmission wheel set, the single sample bag 1a reaches the clamping position of the suction sampling clamp 9. At this time, the upper and lower surfaces of the single sample bag 1a correspond to the upper and lower clamps 9a and 9b of the suction sampling clamp 9, respectively. The air pump works, and the air pump forms negative pressure with the cavity, so that the upper surface and the lower surface of the sample bag monomer 1a are sucked up and down simultaneously. Due to the microporous contact, the single body of the sample can be uniformly and maximally expanded. In the process of expanding the sample bag single body 1a, external air enters the sample bag single body 1a through the air duct 1b, and external air sampling is completed. When the designed suction amount is reached, the suction sampling clamp 9 stops acting, and the end part of the air guide pipe 1b is heated and closed by the hot melt sealing device 11 to realize hot melt sealing. After the end of the air duct 1b is closed, the air pump starts the reverse exhaust period, and the suction sampling clamp 9 is restored to the closed state. The closed sample bag unit 1a after sampling falls into the sample bin.
The above description is only exemplary of the present invention and should not be taken as limiting, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. An automatic gas sampling device, its characterized in that: the sample bag comprises a sample bag belt (2) formed by connecting a plurality of sample bag monomers (1a) end to end, wherein each sample bag monomer (1a) is provided with a positioning hole (1a-1), the interior of each sample bag monomer (1a) is in a vacuum state, the head parts of the sample bag monomers (1a) are communicated and fixed with an air guide pipe (1b), and the end parts, far away from the sample bag monomers (1a), of the air guide pipes (1b) are closed; two parallel cutting seams are precut between any two adjacent sample bag monomers (1a) on the sample bag monomer (1a), the two cutting seams penetrate through the sample bag monomer (1a) along the width direction of the sample bag monomer (1a), one cutting seam is an opening cutting seam (1a), and the other cutting seam is a monomer separation cutting seam (2 b);
the device also comprises a collecting device, wherein the collecting device comprises a belt bin (3), a first traction transmission wheel set (41), a first guide slot (51), a second traction transmission wheel set (42), a second guide slot (52), a third traction transmission wheel set (43), a third guide slot (53), a fourth traction transmission wheel set (44) and a suction sampling clamp (9) which are sequentially arranged from left to right; the structure and the transmission direction of the first traction transmission wheel set (41), the second traction transmission wheel set (42), the third traction transmission wheel set (43) and the fourth traction transmission wheel set (44) are the same, the first traction transmission wheel set, the second traction transmission wheel set, the third traction transmission wheel set and the fourth traction transmission wheel set respectively comprise two guide wheels which are oppositely arranged from top to bottom, one guide wheel is a driving wheel, the other guide wheel is a driven wheel, the wheel surfaces of the driving wheel and the driven wheel are attached to each other, the sample bag belt (2) is clamped tightly, and the sample bag belt (2) is subjected to traction transmission from left to right in; the first guide slot (51), the second guide slot (52) and the third guide slot (53) comprise channels through which the sample bag belt (2) can pass and can limit the position and shape of the sample bag belt (2);
a separating and cutting knife (61) is arranged above the second guide slot (52), and the shape and the length of the separating and cutting knife (61) are matched with those of the single separating and cutting seam (2 b); a first photoelectric positioner (71) is arranged at the second guide slot (52), and the first photoelectric positioner (71) is used for monitoring a positioning hole (1a-1) on the sample bag monomer (1a) to judge whether the monomer separation cutting seam (2b) is vertically aligned with the separation cutting knife (61);
an opening cutting knife (62) is arranged above the third guide slot (53), and the shape and the length of the opening cutting knife (62) are matched with those of the opening cutting seam (1 a); a second photoelectric positioner (72) is arranged at the third guide slit, and the second photoelectric positioner (72) is used for monitoring a positioning hole (1a-1) on the single sample to judge whether the single body separation cutting slit (2b) of the single sample bag body (1a) is vertically aligned with the opening cutting knife (62); the third guide slot (53) is also provided with a spraying head (8), and the spraying head (8) is used for spraying codes on the sample bag monomer (1 a);
the suction sampling clamp (9) comprises an upper clamp body (9a) and a lower clamp body (9b), a microporous latex plate (10) is arranged on the clamping face of the upper clamp body (9a) and the lower clamp body (9b), micropores are formed in the microporous latex plate (10), a cavity communicated with the micropores is formed in the microporous latex plate (10), and the cavity is communicated with an air suction pump.
2. An automated gas sampling assembly according to claim 1, wherein: and a hot-melt sealing device (11) is installed at the suction sampling clamp (9), and the end part of the air guide pipe (1b) far away from the sample bag monomer (1a) is subjected to hot-melt sealing by utilizing the hot-melt sealing device (11).
3. An automated gas sampling assembly according to claim 1, wherein: the size of the micropores formed in the microporous latex plate (10) is 0.2mm to 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331348.9A CN113029711A (en) | 2021-03-26 | 2021-03-26 | Automatic gas sampling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110331348.9A CN113029711A (en) | 2021-03-26 | 2021-03-26 | Automatic gas sampling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113029711A true CN113029711A (en) | 2021-06-25 |
Family
ID=76474304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110331348.9A Pending CN113029711A (en) | 2021-03-26 | 2021-03-26 | Automatic gas sampling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113029711A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009107325A (en) * | 2008-05-30 | 2009-05-21 | Marutaka:Kk | Manufacturing method for packaging bag material with handhold part |
| JP2009250800A (en) * | 2008-04-07 | 2009-10-29 | Keisuke Uchimoto | Gas sampling bag member and its manufacturing method |
| CN204731069U (en) * | 2015-05-25 | 2015-10-28 | 张孟琦 | Anti-gas-leak sample body sampling bag |
| CN107226238A (en) * | 2017-07-21 | 2017-10-03 | 成泰昌包装制品(深圳)有限公司 | One kind inflation bag package machine and its packing method |
| CN109367131A (en) * | 2018-11-10 | 2019-02-22 | 青岛周氏塑料包装有限公司 | Barcode scanning refuse bag production equipment |
| CN208530914U (en) * | 2018-05-11 | 2019-02-22 | 沈阳康福食品有限公司 | Gas Flushing Machine |
| CN110455592A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | Based on self-priming gas production bag and its application |
-
2021
- 2021-03-26 CN CN202110331348.9A patent/CN113029711A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009250800A (en) * | 2008-04-07 | 2009-10-29 | Keisuke Uchimoto | Gas sampling bag member and its manufacturing method |
| JP2009107325A (en) * | 2008-05-30 | 2009-05-21 | Marutaka:Kk | Manufacturing method for packaging bag material with handhold part |
| CN204731069U (en) * | 2015-05-25 | 2015-10-28 | 张孟琦 | Anti-gas-leak sample body sampling bag |
| CN107226238A (en) * | 2017-07-21 | 2017-10-03 | 成泰昌包装制品(深圳)有限公司 | One kind inflation bag package machine and its packing method |
| CN110455592A (en) * | 2018-05-07 | 2019-11-15 | 中国石油化工股份有限公司 | Based on self-priming gas production bag and its application |
| CN208530914U (en) * | 2018-05-11 | 2019-02-22 | 沈阳康福食品有限公司 | Gas Flushing Machine |
| CN109367131A (en) * | 2018-11-10 | 2019-02-22 | 青岛周氏塑料包装有限公司 | Barcode scanning refuse bag production equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113029711A (en) | Automatic gas sampling device | |
| CN206920429U (en) | A kind of remote online water monitoring device | |
| CN107388649B (en) | gas-liquid separator for multi-connected heat pump and manufacturing method thereof | |
| CN204903096U (en) | Batteries of electric vehicle casing gas tightness detection device | |
| CN201716160U (en) | Mechanism using negative method to detect weld seam in geomemberane | |
| CN207197569U (en) | A kind of portable airborne dust monitoring device | |
| CN206661704U (en) | The length detecting systems of rubber | |
| CN205762865U (en) | Pneumatic movable dust absorbing air passage | |
| CN112066254A (en) | Helium recovery control method | |
| CN112897123A (en) | Mining automatic water spray dust collector | |
| CN206825570U (en) | Hydraulic cutter | |
| CN204666407U (en) | A kind of liquid sample instrument | |
| CN211799872U (en) | Waste gas collecting device of semi-blind flow plate-and-frame filter press | |
| CN205861406U (en) | Full automatic atmospheric keeps sample device | |
| CN210437979U (en) | Conveying belt deviation monitoring system | |
| CN211178796U (en) | Pump station ambient temperature detecting system | |
| CN211030899U (en) | Modular flue gas collection device is used in rubber processing | |
| CN111717383A (en) | Solar unmanned aerial vehicle with air quality detection | |
| CN220751743U (en) | Building carbon emission measures sampling device | |
| CN206132721U (en) | Remote control formaldehyde detects siren | |
| CN218725293U (en) | Cooling liquid pot lid valve body detection device | |
| CN219038535U (en) | Portable negative pressure system gas sampling device | |
| CN219152088U (en) | Remaining needle part assembling and detecting equipment | |
| CN217443300U (en) | Environment real-time monitoring and gas sampling device | |
| CN220153810U (en) | Air tightness detection device |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210625 |