CN111017886A - Air compression nitrogen making device - Google Patents
Air compression nitrogen making device Download PDFInfo
- Publication number
- CN111017886A CN111017886A CN201911277752.1A CN201911277752A CN111017886A CN 111017886 A CN111017886 A CN 111017886A CN 201911277752 A CN201911277752 A CN 201911277752A CN 111017886 A CN111017886 A CN 111017886A
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- China
- Prior art keywords
- compression
- air
- nitrogen
- sleeve
- sides
- 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.)
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 72
- 230000006835 compression Effects 0.000 title claims abstract description 55
- 238000007906 compression Methods 0.000 title claims abstract description 55
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 36
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000000926 separation method Methods 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 238000012423 maintenance Methods 0.000 abstract description 8
- 230000000712 assembly Effects 0.000 abstract 3
- 238000000429 assembly Methods 0.000 abstract 3
- 230000000694 effects Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B21/00—Nitrogen; Compounds thereof
- C01B21/04—Purification or separation of nitrogen
- C01B21/0405—Purification or separation processes
- C01B21/0433—Physical processing only
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/50—Joints or other connecting parts
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C9/00—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes
- E06C9/06—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted
- E06C9/08—Ladders characterised by being permanently attached to fixed structures, e.g. fire escapes movably mounted with rigid longitudinal members
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses an air compression nitrogen making device, which belongs to the field of air compression nitrogen making and comprises a device main body, wherein compression tanks are arranged on two sides of the device main body, air compression mechanisms are arranged at the top ends of one sides of the compression tanks, sliding assemblies are arranged at the bottom ends of the outer sides of two groups of the compression tanks, sleeving assemblies are arranged on two sides of the tops of the two groups of the sliding assemblies, a mounting frame is arranged on one adjacent side of the two groups of the compression tanks, a nitrogen-oxygen separation tank is arranged at the top of the mounting frame, and an air pump is arranged at one end of the nitrogen-oxygen separation tank. According to the invention, the escalator slides on the outer side of the compression tank under the combined action of the first connecting rod, the second connecting rod and the sliding block through the first sliding chute and the second sliding chute, and does circular motion on the outer side along with the cylindrical structure of the tank body of the compression tank, so that the escalator can be slid according to the specific position required, and the difficulty of subsequent maintenance is reduced.
Description
Technical Field
The invention relates to the field of air compression nitrogen production, in particular to an air compression nitrogen production device.
Background
The nitrogen generator is a device which takes air as a raw material and obtains nitrogen by separating oxygen and nitrogen in the air by a physical method. Nitrogen generators industrially used can be classified into three types according to the classification method, i.e., a cryogenic air separation method, a molecular sieve air separation method (PSA), and a membrane air separation method.
However, in the existing nitrogen making machine, for the convenience of use and the convenience of maintenance, a corresponding escalator is generally arranged outside the tank body, but the escalator on the existing nitrogen making machine cannot rotate by taking the nitrogen making machine as a base point according to actual conditions, so that certain inconvenience is caused for subsequent maintenance, the height of the escalator in the existing nitrogen making machine is not easy to adjust, the difficulty of use is increased, and the utilization rate is reduced.
Disclosure of Invention
The invention aims to: in order to solve in the current nitrogen making machine for convenient to use and maintenance of being convenient for, generally set up corresponding staircase in the outside of jar body, however the staircase on the current nitrogen making machine can not use the nitrogen making machine to rotate as the basic point according to actual conditions to certain inconvenience has been caused for subsequent maintenance, and the staircase in the current nitrogen making machine is highly difficult for adjusting, thereby has increased the degree of difficulty of using, and has reduced the problem of rate of utilization, provides a pneumatics nitrogen making device.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an air compression nitrogen making device, includes the device main part, the both sides of device main part all are provided with the compression jar, air compression mechanism is all installed on the top of compression jar one side, and is two sets of the bottom in the compression jar outside all is provided with the sliding assembly, and is two sets of the both sides at sliding assembly top all are provided with cup joints the subassembly, and are two sets of one side that the compression jar is adjacent is provided with the mounting bracket, the nitrogen oxygen knockout drum is installed at the top of mounting bracket, the air pump is installed to the one end of nitrogen oxygen knockout drum, the input of air pump all is provided with the air duct that runs through to the inside one side of compression jar, the output of air pump is provided with the.
Preferably, air compressor mechanism's bottom all is provided with the mount, and the mount passes through the bolt and can dismantle with the compression jar and be connected, air compressor is all installed at the top of mount, air compressor's inlet end all is provided with the intake pipe, the filter layer is all installed to one side that air compressor was kept away from to the intake pipe, the top of filter layer all is provided with the air inlet.
Preferably, the bottom of sliding component all is provided with first spout, one side of sliding component all is provided with the staircase, the intermediate position department in the compression jar outside all is provided with the second spout, the staircase is close to the both sides of first spout one side bottom and all is provided with the head rod, the top of head rod all is provided with the second connecting rod.
Preferably, the top of cup jointing the subassembly all is provided with the sleeve, the top of staircase all extends to the inside top of sleeve, the top of staircase all is provided with the limiting plate, the one end of staircase all is provided with the rack, the bottom of sleeve one side all is provided with the pull rod that runs through to the inside one side of sleeve, one side of pull rod is provided with the handle, and the handle is located the telescopic outside, the outside of pull rod all be provided with rack assorted gear, one side that the handle was kept away from to the pull rod all is provided with the fixture block.
Preferably, one end of the nitrogen-oxygen separation tank is provided with a storage tank, and the nitrogen-oxygen separation tank and the storage tank are communicated through a communicating pipe.
Preferably, one side of the handle is kept away from to telescopic inside is provided with the draw-in groove with fixture block assorted, and the pull rod all can dismantle with the sleeve through mutually supporting of fixture block and draw-in groove and be connected.
Preferably, the outside of handle all is provided with the cushion, and the outside of cushion evenly is provided with multiunit friction line.
Preferably, the gear is intermeshed with the rack and the gear is located inside the sleeve.
Preferably, the first connecting rod and the second connecting rod are provided with sliding blocks matched with the first sliding groove and the second sliding groove on one sides far away from the escalator.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the escalator slides on the outer side of the compression tank under the combined action of the first connecting rod, the second connecting rod and the sliding block through the first sliding chute and the second sliding chute, and does circular motion on the outer side along with the cylindrical structure of the tank body of the compression tank, so that the escalator can be slid according to the specific position required, and the difficulty of subsequent maintenance is reduced;
2. according to the invention, the pull rod is slightly pulled outwards, so that the fixture block on the pull rod is separated from the position of the clamping groove, then the handle is rotated, the handle drives the gear to rotate, and therefore, the gear and the rack are meshed with each other, the sleeve slowly slides upwards on the outer side of the rack, when the sleeve slides to a proper position, the pull rod is pressed towards one side inside the sleeve, the fixture block is driven by the pull rod to be in contact with the position of the clamping groove and clamped, so that the top of the escalator is prolonged, the height of the escalator is simpler to adjust, the use difficulty is reduced, and the use rate is improved.
Drawings
FIG. 1 is a front view of the present invention;
fig. 2 is a schematic structural view of the escalator of the present invention;
FIG. 3 is a schematic structural view of the first sliding chute of the present invention;
FIG. 4 is a partial schematic view of the present invention;
fig. 5 is an enlarged view of the present invention a.
In the figure: 1. a device main body; 2. a compression tank; 3. an air compression mechanism; 301. an air compressor; 302. a filter layer; 303. an air inlet pipe; 304. an air inlet; 305. a fixed mount; 4. a nitrogen-oxygen separation tank; 5. a communicating pipe; 6. a sliding assembly; 601. a first chute; 602. a first connecting rod; 603. a second chute; 604. an escalator; 605. a second connecting rod; 606. a slider; 7. a socket component; 701. a sleeve; 702. a rack; 703. a limiting plate; 704. a handle; 705. a pull rod; 706. a clamping block; 707. a gear; 8. a mounting frame; 9. an air pump; 10. an air duct; 11. a conduit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The air pump (model: VP0125) and the air compressor (model: W-65) can be obtained by market or private ordering.
Please refer to fig. 1-5, an air compression nitrogen making device, including device main part 1, device main part 1's both sides all are provided with compression tank 2, air compression mechanism 3 is all installed on the top of compression tank 2 one side, the bottom in the 2 outsides of two sets of compression tanks all is provided with sliding assembly 6, the both sides at 6 tops of two sets of sliding assembly all are provided with cup joints subassembly 7, the adjacent one side of two sets of compression tanks 2 is provided with mounting bracket 8, nitrogen oxygen knockout drum 4 is installed at the top of mounting bracket 8, air pump 9 is installed to the one end of nitrogen oxygen knockout drum 4, the input of air pump 9 all is provided with the air duct 10 that runs through to the inside one side of compression tank 2, the output of air pump 9 is provided with the pipe 11 that runs through to.
According to the invention, the handle 704 is rotated, so that the handle 704 drives the gear 707 to rotate, the gear 707 and the rack 702 are meshed with each other, the sleeve 701 slides upwards slowly on the outer side of the rack 702, when the sleeve 701 slides to a proper position, the pull rod 705 is pressed towards one side inside the sleeve 701, the pull rod drives the fixture block 706 to be in contact with the position of the fixture groove and clamped, and therefore the top of the escalator 604 is prolonged, the height adjustment of the escalator 604 is simpler, the use difficulty is reduced, and the use rate is improved.
Please refer to fig. 1, the bottom of the air compressing mechanism 3 is provided with a fixing frame 305, the fixing frame 305 is detachably connected with the compressing tank 2 through bolts, the top of the fixing frame 305 is provided with an air compressor 301, the air inlet end of the air compressor 301 is provided with an air inlet pipe 303, one side of the air inlet pipe 303 far away from the air compressor 301 is provided with a filtering layer 302, and the top of the filtering layer 302 is provided with an air inlet 304.
This kind of air compression nitrogen making device sets up the filter layer through the contact jaw at air compressor 301 and air, and the filter layer includes activated carbon layer, filter screen and adsorbed layer, adsorbs dust and steam that carry in the air current to make the air current purity of leading-in compression tank 2 inside higher.
Please refer to fig. 1, 2, 3 and 5, the bottom of the sliding assembly 6 is provided with a first sliding chute 601, one side of the sliding assembly 6 is provided with a staircase 604, the middle position of the outer side of the compression tank 2 is provided with a second sliding chute 603, two sides of the bottom end of the staircase 604 near the first sliding chute 601 are provided with a first connecting rod 602, and a second connecting rod 605 is arranged above the first connecting rod 602.
According to the air compression nitrogen making device, the escalator 604 can conveniently slide on the periphery of the compression tank 2 through the first sliding groove 601 and the second sliding groove 603, so that the position of the escalator 604 can be conveniently adjusted, the use difficulty is reduced, and convenience is brought to follow-up maintenance.
Please refer to fig. 1, 2 and 4, the top of the sleeving assembly 7 is provided with a sleeve 701, the top of the staircase 604 extends to the top end of the inside of the sleeve 701, the top of the staircase 604 is provided with a limit plate 703, one end of the staircase 604 is provided with a rack 702, the bottom end of one side of the sleeve 701 is provided with a pull rod 705 penetrating to one side of the inside of the sleeve 701, one side of the pull rod 705 is provided with a handle 704, the handle 704 is located outside the sleeve 701, the outside of the pull rod 705 is provided with a gear 707 matched with the rack 702, and one side of the pull rod 705 away from the handle 704 is provided with a fixture block 706.
According to the air compression nitrogen making device, the rack 702 and the gear 707 are matched with each other, when the gear 707 rotates, the rack 702 generates opposite acting force on the gear 707, so that the gear 707 drives the sleeve 701 to extend upwards while rotating, and the height of the escalator 604 is adjusted.
Please refer to fig. 4, a storage tank is disposed at one end of the nitrogen-oxygen separation tank 4, the nitrogen-oxygen separation tank 4 is communicated with the storage tank through a communication pipe 5, a clamping groove matched with the clamping block 706 is disposed at one side of the interior of the sleeve 701 far away from the handle 704, and the pull rod 705 is detachably connected with the sleeve 701 through the mutual matching of the clamping block 706 and the clamping groove.
This kind of nitrogen device is pressed to air pressure passes through mutually supporting of fixture block 706 and draw-in groove, makes pull rod 705 sleeve 701 can dismantle the connection to make the fixed effect between pull rod 705 and the sleeve 701 better, and be convenient for rotate the gear 707 of in-process and play fixed effect, and the one end that handle 704 was kept away from to fixture block 706 is "U" shape structure, thereby makes its fixed effect better, and fixed more firm.
Please refer to fig. 1, 2 and 4, the outer sides of the handles 704 are provided with cushions, the outer sides of the cushions are uniformly provided with a plurality of sets of friction lines, the gears 707 are engaged with the racks 702, the gears 707 are located inside the sleeves 701, and the sides of the first connecting rod 602 and the second connecting rod 605 away from the escalator 604 are provided with sliding blocks 606 matched with the first sliding chute 601 and the second sliding chute 603.
This kind of nitrogen device is pressed to air pressure makes the result of use of handle 704 better through the cushion and the friction line that set up, and through mutually supporting of gear 707 and rack 702, makes pull rod 705 can drive gear 707 when rotating and rotate to highly adjusting sleeve 701.
The working principle is as follows: when the device is used, a power supply is switched on, external air is respectively led into the two groups of compression tanks 2 through the air inlet 304, the filter layer 302 and the air inlet pipe 303 by the two groups of air compressors 301, so that the working efficiency is improved to a certain extent, compressed air entering the compression tanks 2 is uniformly led into the nitrogen-oxygen separation tank 4 through the air guide pipe 10 and the guide pipe 11 by the air pump, so that nitrogen-oxygen separation is carried out on the air flow passing through the nitrogen-oxygen separation tank 4, and the separated nitrogen is led into the storage tank through the communication pipe 5 for storage (wherein, the specific operation of the compression tanks 2 and the nitrogen-oxygen separation tank 4 belongs to the prior art category and is not described in detail herein), when the compression tanks 2 need to be maintained, the staircase 604 is manually slid to enable the staircase 604 to slide outside the compression tanks 2 under the mutual matching of the sliding blocks 606, the first sliding chutes 601 and the second sliding chutes 603, therefore, the position of the escalator 604 can be manually adjusted, the escalator 604 can be slid according to the specific position required, and the difficulty of subsequent maintenance is reduced; when the top of the compression tank 2 needs to be reached and the length of the escalator 604 needs to be extended, the pull rod 705 is pulled outwards slightly to separate the fixture block 706 from the position of the fixture groove on the pull rod 705, then the handle 704 is rotated to drive the gear 707 to rotate, so that the gear 707 and the rack 702 are meshed with each other, the sleeve 701 slides upwards slowly on the outer side of the rack 702, when the sleeve 701 slides to a proper position, the pull rod 705 is pressed towards one side inside the sleeve 701 to drive the fixture block 706 to be in contact with the position of the fixture groove and clamped tightly, the top of the escalator 604 is extended, the height of the escalator 604 is adjusted more simply, the use difficulty is reduced, and the use rate is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. A device for making nitrogen by air compression, comprising a device body (1), characterized in that: the both sides of device main part (1) all are provided with compression jar (2), air compression mechanism (3) are all installed on the top of compression jar (2) one side, and are two sets of the bottom in compression jar (2) outside all is provided with sliding component (6), and is two sets of the both sides at sliding component (6) top all are provided with cup joints subassembly (7), and are two sets of one side that compression jar (2) are adjacent is provided with mounting bracket (8), nitrogen oxygen knockout drum (4) are installed at the top of mounting bracket (8), air pump (9) are installed to the one end of nitrogen oxygen knockout drum (4), the input of air pump (9) all is provided with air duct (10) that run through to compression jar (2) inside one side, the output of air pump (9) is provided with pipe (11) that run through to nitrogen oxygen knockout drum (4) inside one end.
2. A compressed air nitrogen plant as claimed in claim 1, wherein: the bottom of air compression mechanism (3) all is provided with mount (305), and can dismantle with compression jar (2) through the bolt in mount (305) and be connected, air compressor (301) are all installed at the top of mount (305), the inlet end of air compressor (301) all is provided with intake pipe (303), filter layer (302) are all installed to one side that air compressor (301) were kept away from in intake pipe (303), the top of filter layer (302) all is provided with air inlet (304).
3. A compressed air nitrogen plant as claimed in claim 1, wherein: the bottom of sliding component (6) all is provided with first spout (601), one side of sliding component (6) all is provided with staircase (604), the intermediate position department in compression jar (2) outside all is provided with second spout (603), both sides that staircase (604) are close to first spout (601) one side bottom all are provided with head rod (602), the top of head rod (602) all is provided with second connecting rod (605).
4. A compressed air nitrogen plant according to claim 3, wherein: the top of cup jointing subassembly (7) all is provided with sleeve (701), the top of staircase (604) all extends to the inside top of sleeve (701), the top of staircase (604) all is provided with limiting plate (703), the one end of staircase (604) all is provided with rack (702), the bottom of sleeve (701) one side all is provided with pull rod (705) that run through to the inside one side of sleeve (701), one side of pull rod (705) is provided with handle (704), and handle (704) are located the outside of sleeve (701), the outside of pull rod (705) all is provided with and rack (702) assorted gear (707), one side that handle (704) were kept away from in pull rod (705) all is provided with fixture block (706).
5. A compressed air nitrogen plant as claimed in claim 1, wherein: one end of the nitrogen-oxygen separation tank (4) is provided with a storage tank, and the nitrogen-oxygen separation tank (4) is communicated with the storage tank through a communicating pipe (5).
6. A compressed air nitrogen plant according to claim 4, wherein: a clamping groove matched with the clamping block (706) is formed in one side, away from the handle (704), of the interior of the sleeve (701), and the pull rod (705) is detachably connected with the sleeve (701) through the mutual matching of the clamping block (706) and the clamping groove.
7. A compressed air nitrogen plant according to claim 4, wherein: the outside of handle (704) all is provided with the cushion, and the outside of cushion evenly is provided with multiunit friction line.
8. A compressed air nitrogen plant according to claim 4, wherein: the gear (707) is meshed with the rack (702), and the gear (707) is positioned inside the sleeve (701).
9. A compressed air nitrogen plant according to claim 3, wherein: and sliding blocks (606) matched with the first sliding groove (601) and the second sliding groove (603) are arranged on one sides of the first connecting rod (602) and the second connecting rod (605) far away from the escalator (604).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911277752.1A CN111017886A (en) | 2019-12-11 | 2019-12-11 | Air compression nitrogen making device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911277752.1A CN111017886A (en) | 2019-12-11 | 2019-12-11 | Air compression nitrogen making device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111017886A true CN111017886A (en) | 2020-04-17 |
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ID=70208388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911277752.1A Pending CN111017886A (en) | 2019-12-11 | 2019-12-11 | Air compression nitrogen making device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111017886A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6688426B1 (en) * | 2002-03-02 | 2004-02-10 | Harry Mikros | Wheel extension and lift device for ladders |
| CN202970421U (en) * | 2012-10-24 | 2013-06-05 | 深圳广田装饰集团股份有限公司 | Height-variable herringbone ladder |
| CN204184766U (en) * | 2014-10-16 | 2015-03-04 | 安徽达诺乳业有限公司 | A kind of container for storing milk being convenient to safeguard |
| CN207596295U (en) * | 2017-12-07 | 2018-07-10 | 杭州西奥电梯有限公司 | A kind of staircase and girder intermediate strutting device |
| CN209668768U (en) * | 2018-11-01 | 2019-11-22 | 南通腾龙化工科技有限公司 | A kind of novel nitrogen making machine |
-
2019
- 2019-12-11 CN CN201911277752.1A patent/CN111017886A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6688426B1 (en) * | 2002-03-02 | 2004-02-10 | Harry Mikros | Wheel extension and lift device for ladders |
| CN202970421U (en) * | 2012-10-24 | 2013-06-05 | 深圳广田装饰集团股份有限公司 | Height-variable herringbone ladder |
| CN204184766U (en) * | 2014-10-16 | 2015-03-04 | 安徽达诺乳业有限公司 | A kind of container for storing milk being convenient to safeguard |
| CN207596295U (en) * | 2017-12-07 | 2018-07-10 | 杭州西奥电梯有限公司 | A kind of staircase and girder intermediate strutting device |
| CN209668768U (en) * | 2018-11-01 | 2019-11-22 | 南通腾龙化工科技有限公司 | A kind of novel nitrogen making machine |
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Application publication date: 20200417 |
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