CN219994980U - Hydrogen detector of wool making equipment - Google Patents
Hydrogen detector of wool making equipment Download PDFInfo
- Publication number
- CN219994980U CN219994980U CN202320862249.8U CN202320862249U CN219994980U CN 219994980 U CN219994980 U CN 219994980U CN 202320862249 U CN202320862249 U CN 202320862249U CN 219994980 U CN219994980 U CN 219994980U
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- Prior art keywords
- hydrogen detector
- magnetic attraction
- fixedly connected
- face
- blocks
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 239000001257 hydrogen Substances 0.000 title claims abstract description 91
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 91
- 210000002268 wool Anatomy 0.000 title claims abstract description 23
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052742 iron Inorganic materials 0.000 claims abstract description 25
- 230000001681 protective effect Effects 0.000 claims description 19
- 230000005389 magnetism Effects 0.000 claims description 9
- 230000001012 protector Effects 0.000 claims description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 12
- 238000000034 method Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 4
- 239000007795 chemical reaction product Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
The utility model discloses a hydrogen detector of a wool making device, which comprises a hydrogen detector, wherein a fixing mechanism and a protecting device are arranged on the hydrogen detector, the fixing mechanism comprises a plurality of magnetic attraction connecting columns and a plurality of fixing components, the magnetic attraction connecting columns are fixedly connected to one side end face of the hydrogen detector, the fixing components comprise limit buckles and magnetic attraction rings, a plurality of first iron sheets are fixedly connected in the magnetic attraction rings, the magnetic attraction connecting columns are fixedly connected with the first iron sheets in the magnetic attraction rings, the protecting device comprises a protecting shell, a plurality of buckles are fixedly connected to the magnetic attraction connecting columns, clamping grooves matched with the buckles are formed in the magnetic attraction rings, and the buckles are clamped in the clamping grooves. The utility model realizes that the hydrogen detector can be quickly installed when being installed on the top end face of the wool making equipment, has high working efficiency and high stability, is not easy to be interfered by air flow near the exhaust pipeline, and has high safety.
Description
Technical Field
The utility model relates to the technical field of photovoltaic cell production, in particular to a hydrogen detector of texturing equipment.
Background
The firing accidents of a plurality of texturing devices occur in the photovoltaic cell industry, and finally, the reason for checking is that the exhaust amount is too small.
Sodium hydroxide and related reaction products form salt crystals in an exhaust pipeline, the crystallization leads to unsmooth exhaust, the pipeline is easy to condense inflammable substances and oxygen combustion-supporting gas, and because the mixture of sodium hydroxide, sodium silicate and the like exists in the exhaust pipeline, static electricity can be generated and accumulated in the flowing process of the crystals and liquid drops in suspension air, and the static electricity discharge ignites the explosive mixture after reaching a certain value along with the continuous increase of the temperature in the pipeline.
Therefore, in the prior art, in order to prevent the condition that the negative pressure detection alarm device of the machine exhaust pipeline fails and the air exhaust quantity is small, a hydrogen detector is added, the concentration range of hydrogen detection is 0-10000ppm, the hydrogen detector is externally connected with a buzzer alarm, and the alarm is given after the hydrogen concentration is detected to be out of range. The concentration of hydrogen in the air reaches 40000 ppm-750000 ppm, the hydrogen can explode, and the hydrogen detector can detect the hydrogen before the explosion limit.
When the hydrogen detector is installed, a plurality of holes are generally directly drilled on the top end face of the wool making equipment, the hydrogen detector is fixed at the top by using the cooperation of bolts and nuts, the wool making equipment is large in use environment space, so that the installation method is troublesome, low in efficiency and unstable, especially when the hydrogen detector is installed near an exhaust pipeline, a large amount of air flow is generated near the exhaust pipeline, the hydrogen detector is often interfered by the air flow, the bolt and the hydrogen detector are loose at the fixed position, the falling is caused, and the safety is poor.
Disclosure of Invention
The utility model aims to provide a hydrogen detector of a wool making device, which can be quickly installed when being installed on the top end face of the wool making device, has high working efficiency and high stability, is not easy to be interfered by air flow near an exhaust pipeline, and has high safety.
In order to achieve the above purpose, the utility model provides a hydrogen detector of a wool making device, which comprises a hydrogen detector, wherein a fixing mechanism and a protecting device are arranged on the hydrogen detector, the fixing mechanism comprises a plurality of magnetic attraction connecting columns and a plurality of fixing components, the magnetic attraction connecting columns are fixedly connected to one side end face of the hydrogen detector, the fixing components comprise limit buckles and magnetic attraction rings, a plurality of first iron sheets are fixedly connected in the magnetic attraction rings, the magnetic attraction connecting columns are magnetically attracted to the first iron sheets in the magnetic attraction rings, and the protecting device comprises a protecting shell.
In one or more embodiments, a plurality of the magnetic connection posts are fixedly connected with buckles, a plurality of the magnetic connection posts are provided with clamping grooves matched with the buckles, and the buckles are clamped with the clamping grooves.
In one or more embodiments, the projection of the limit button on the horizontal plane is larger than the projection of the magnetic attraction ring on the horizontal plane.
In one or more embodiments, a plurality of second connecting lugs are fixedly connected to one side end face on the protective shell, a plurality of first connecting lugs are respectively connected to the second connecting lugs, and a plurality of first connecting lugs are respectively and fixedly connected to the magnetic attraction connecting column.
In one or more embodiments, a plurality of first magnetic blocks are fixedly connected to the second connecting lugs, a plurality of second limiting holes matched with the first magnetic blocks are formed in the first connecting lugs, a plurality of second iron sheets are fixedly connected in the second limiting holes, and the first magnetic blocks are magnetically connected with the second iron sheets in the second limiting holes.
In one or more embodiments, the inner wall end surface of the protective shell is matched with the outer end surface of the hydrogen detector, the protective shell is in super-hard fit with the outer end surface of the hydrogen detector, and the inner wall end surface of the protective shell is provided with an anti-slip pad.
In one or more embodiments, the bottom end surface of the protection device is provided with a sliding groove, a filter plate is connected in the sliding groove in a sliding way, the filter plate comprises a pair of sliding blocks, the pair of sliding blocks slide in the sliding groove, and a plurality of filter holes are formed in the filter plate.
In one or more embodiments, the filter plate is fixedly connected with a pair of second magnetic attraction blocks, the end surface of the protective shell, which is contacted with the second magnetic attraction blocks, is provided with a first limiting hole matched with the pair of second magnetic attraction blocks, a plurality of third iron sheets are fixedly connected in the first limiting hole, and the second magnetic attraction blocks are magnetically attracted to connect the third iron sheets in the first limiting hole.
In one or more embodiments, a pulling ring is fixedly connected to one side end surface of the bottom of the filter plate.
Compared with the prior art, the hydrogen detector of the wool making equipment can be quickly installed when being installed on the top end face of the wool making equipment, is high in working efficiency and stability, is not easy to be interfered by air flow near an exhaust pipeline, and is high in safety.
Drawings
Fig. 1 is a schematic structural view of a hydrogen detector of a texturing apparatus according to an embodiment of the present utility model.
Fig. 2 is an exploded view of a hydrogen detector of a texturing apparatus according to an embodiment of the present utility model.
Fig. 3 is a schematic view showing a first use state of the hydrogen detector of the texturing apparatus according to an embodiment of the present utility model.
Fig. 4 is an exploded view of a hydrogen detector of a texturing apparatus according to an embodiment of the present utility model.
Fig. 5 is a schematic view showing a second use state of the hydrogen detector of the texturing apparatus according to an embodiment of the present utility model.
Fig. 6 is a schematic structural diagram of the hydrogen gas detector 1.
Fig. 7 is a schematic structural view of the fixing member 4.
Fig. 8 is a schematic structural view of the filter plate 6.
The main reference numerals illustrate:
1-hydrogen detector, 2-fixed mechanism, 201-magnetic connection post, 202-buckle, 203-first connecting lug, 3-protector, 301-protective shell, 302-first spacing hole, 303-sliding groove, 304-second connecting lug, 305-first magnetic block, 4-fixed component, 401-joint groove, 402-spacing buckle, 403-magnetic ring, 5-second spacing hole, 6-filter, 601-second magnetic block, 602-pull ring, 603-sliding block, 7-top layer of the texturing equipment.
Detailed Description
The following detailed description of embodiments of the utility model is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the utility model is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
As shown in fig. 1, the hydrogen detector of the wool making device according to an embodiment of the utility model comprises a hydrogen detector 1, wherein the hydrogen detector 1 is externally connected with a buzzer alarm, so that the alarm is sent out after the hydrogen detector 1 detects that the concentration of hydrogen exceeds the range. Since the concentration of hydrogen in the air reaches 40000ppm to 750000ppm, the hydrogen detector 1 is required to monitor the concentration of hydrogen in real time, and the concentration is detected before the explosion limit of hydrogen.
The hydrogen detector 1 is provided with a fixing mechanism 2 and a protecting device 3, the fixing mechanism 2 comprises a plurality of magnetic attraction connecting columns 201 and a plurality of fixing components 4, the plurality of magnetic attraction connecting columns 201 are fixedly connected to one side end face of the hydrogen detector 1, the fixing components 4 comprise a limit buckle 402 and a magnetic attraction ring 403, and the magnetic attraction ring 403 is fixedly connected with the limit buckle 402.
The magnetic attraction ring 403 is fixedly connected with a plurality of first iron sheets, and the magnetic attraction connecting column 201 is magnetically connected with the first iron sheets in the magnetic attraction ring 403, so that the hydrogen detector 1 is fixed on the top end face of the top layer 7 of the wool making equipment.
As shown in fig. 5, specifically, after a plurality of limit grooves are drilled on the top end surface of the top layer 7 of the texturing device by using a tool, a limit button 402 is penetrated into the limit groove finished on the top layer 7 of the texturing device, and then enters the top layer 7 of the texturing device, a plurality of magnetic connection posts 201 on the hydrogen detector 1 are tightly attached to the limit button 402, and the magnetic connection posts 201 magnetically connect with a first iron sheet in a magnetic ring 403;
the method has the advantages that the hydrogen detector 1 is fixed on the top end face of the top layer 7 of the wool making equipment, the operation is simple, the stability is high, the method is different from the prior art that bolts and nuts are used for fixing in a matched mode, the operation is troublesome, the time consumption is long, the magnetic attraction fixing is only facilitated, and the method is simple and practical and has high working efficiency.
As shown in fig. 1 to 4, the projection of the limit button 402 on the horizontal plane is larger than the projection of the magnetic attraction ring 403 on the horizontal plane, so that the fixing component 4 is placed in the limit groove and cannot fall off, the magnetic attraction ring 403 is matched with the limit groove, the magnetic attraction ring 403 is excessively hard matched with the limit groove of the top layer 7 of the wool making device, and the stability is high, so that the hydrogen detector 1 is convenient to fix.
All fixedly connected with buckle 202 on the spliced pole 201 is inhaled to magnetism, all offered on a plurality of magnetism inhale ring 403 and buckle 202 assorted joint groove 401, buckle 202 joint groove 401 realizes the further enhancement of fixing on fixed subassembly 4 to hydrogen detector 1.
The protecting device 3 comprises a protecting shell 301 for protecting the outer end face of the hydrogen detector 1, and in the prior art, the entire reaction is strong acid and volatile in the process of wool making, so that air exhaust is needed;
the discharge plays an important role in the whole environment, so sodium hydroxide and related reaction products during the full-down making of the down making equipment can damage the hydrogen detector 1 and shorten the service life of the hydrogen detector 1, and therefore, the protection of the external end face of the hydrogen detector 1 can be achieved by arranging the protection device 3 on the hydrogen detector 1, and the outside of the hydrogen detector 1 is not easy to be corroded by the external environment
Preferably, the protecting device 3 is made of one of acid-resistant, alkali-resistant and corrosion-resistant materials such as plastic pipe and 304 stainless steel, so as to protect the hydrogen detector 1, and the end face of the protecting device 3, which is contacted with the liquid crystal display screen, is transparent, so that data can be conveniently watched at any time.
A plurality of second connecting lugs 304 are fixedly connected to one side end face of the protective shell 301, the plurality of second connecting lugs 304 are connected with first connecting lugs 203, and the plurality of first connecting lugs 203 are fixedly connected to the magnetic attraction connecting column 201.
The first magnetic attraction blocks 305 are fixedly connected to the second connecting lugs 304, the second limiting holes 5 matched with the first magnetic attraction blocks 305 are formed in the first connecting lugs 203, the second iron sheets are fixedly connected to the second limiting holes 5, the first magnetic attraction blocks 305 are magnetically attracted to the second iron sheets in the second limiting holes 5, and the protection device 3 is fixed to the magnetic attraction connecting column 201 of the fixing mechanism 2.
Specifically, when the protector 3 is required to be used for protecting the hydrogen detector 1, the protector 3 is moved to a plurality of first magnetic attraction blocks 305 to magnetically attract the second iron sheets in the second limiting holes 5 on the plurality of first connecting lugs 203, so that the protector 3 is fixed on the magnetic attraction connecting column 201, the hydrogen detector 1 is protected, and the hydrogen detector 1 is prevented from being corroded by the external environment, and damage is caused.
Preferably, the number of the second connecting lugs 304 and the first connecting lugs 203 is 3, the second connecting lugs 304 are uniformly distributed on one side end surface of the protective shell 301, the first connecting lugs 203 are uniformly distributed on the magnetic attraction connecting column 201, and the positions of the second connecting lugs 304 and the magnetic attraction connecting column 201 are matched.
The inner wall end face of the protective shell 301 is matched with the outer end face of the hydrogen detector 1, and the protective shell 301 is excessively hard matched with the outer end face of the hydrogen detector 1 to fix the protective shell 301 on the outer end face of the hydrogen detector 1.
Preferably, the inner wall end surface of the protective shell 301 is provided with an anti-slip pad, so as to strengthen the fixation of the protective shell 301 on the outer side end surface of the hydrogen detector 1.
As shown in fig. 3 to 8, the bottom end face of the protecting device 3 is provided with a sliding groove 303, the sliding groove 303 is connected with a filter plate 6 in a sliding manner, a plurality of filtering holes are formed in the filter plate 6, dust and fragments in the air are filtered, dust and fragments in the air are not easy to enter the hydrogen detector 1, the blockage of the hydrogen detector 1 is affected, and the hydrogen detector 1 cannot be normally used.
Wherein the projection of the bottom end surface of the protecting device 3 on the horizontal plane is larger than the projection of the bottom end surface of the hydrogen detector 1 on the horizontal plane.
As shown in fig. 8, the filter plate 6 includes a pair of slide blocks 603, and the pair of slide blocks 603 slide in the slide grooves 303, so that the filter plate 6 can be taken out individually for cleaning when the filter plate 6 is clogged.
As shown in fig. 3 to 8, a pair of second magnetic attraction blocks 601 are fixedly connected to the filter plate 6, a first limiting hole 302 matched with the pair of second magnetic attraction blocks 601 is formed in the end face of the protective shell 301, which contacts with the second magnetic attraction blocks 601, a plurality of third iron sheets are fixedly connected in the first limiting hole 302, and the second magnetic attraction blocks 601 magnetically attract the third iron sheets in the first limiting hole 302, so that the filter plate 6 is detached and fixed.
A pulling ring 602 is fixedly connected to one side end surface of the bottom of the filter plate 6, so that the filter plate 6 can be conveniently pulled to move downwards for cleaning.
When the hydrogen detector 1 is used for a long time, as shown in fig. 3, when the filter plate 6 is easy to be blocked and needs to be cleaned, the filter plate 6 is taken out for cleaning by taking the pulling ring 602 and pulling the ring downwards;
after the cleaning is completed, the filter plate 6 is moved to the second magnetic attraction block 601 to magnetically attract the third iron sheet connected with the first limiting hole 302, so that the filter plate 6 is fixed on the bottom end face of the protective shell 301.
Referring to fig. 5, when the hydrogen detector 1 needs to be fixed on the top end surface of the top layer 7 of the wool making device, the fixing component 4 can penetrate into a limit groove drilled on the top layer 7 of the wool making device and then enter the top layer 7 of the wool making device, the magnetic attraction connecting column 201 on the hydrogen detector 1 is magnetically attracted to connect with the first iron sheet in the magnetic attraction ring 403, and the clamping buckle 202 is clamped with the clamping groove 401 on the magnetic attraction ring 403, so as to fix the hydrogen detector 1 on the top end surface of the top layer 7 of the wool making device;
and then the protecting device 3 is moved to the first magnetic attraction block 305 on the protecting device 3 to magnetically attract the second iron sheet in the second limiting hole 5 connected with the first connecting lug 203, the protecting device 3 is fixed on the hydrogen detector 1 to protect the hydrogen detector 1, and the hydrogen detector 1 is protected from being corroded by external environment, especially by sodium hydroxide in air and related reaction products.
When the protecting device 3 is not needed, the protecting device 3 can be directly pulled out, and the protecting device 3 is taken out from the hydrogen detector 1, so that the operation is simple.
The foregoing descriptions of specific exemplary embodiments of the present utility model are presented for purposes of illustration and description. It is not intended to limit the utility model to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the utility model and its practical application to thereby enable one skilled in the art to make and utilize the utility model in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the utility model be defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a wool making equipment hydrogen detector, includes the hydrogen detector, its characterized in that, be provided with fixed establishment and protector on the hydrogen detector, fixed establishment includes that a plurality of magnetism inhale spliced pole and a plurality of fixed subassembly, and is a plurality of the equal fixed connection of spliced pole is inhaled to the magnetism at one side terminal surface of hydrogen detector, fixed subassembly includes spacing knot and magnetism and inhale the ring, the magnetism is inhaled in the interior fixedly connected with a plurality of first iron sheets, the magnetism is inhaled the spliced pole magnetism and is inhaled the interior first iron sheet of connecting magnetism, protector includes the protecting crust.
2. The hydrogen detector of claim 1, wherein a plurality of said magnetic connection posts are fixedly connected with buckles, and a plurality of said magnetic rings are provided with clamping grooves matched with the buckles, and said buckles are clamped with the clamping grooves.
3. The hydrogen detector of the texturing device according to claim 1, wherein the projection of the limit button on the horizontal plane is larger than the projection of the magnetic attraction ring on the horizontal plane.
4. The hydrogen detector of claim 1, wherein a plurality of second connecting lugs are fixedly connected to an end face of one side of the protective shell, a plurality of second connecting lugs are connected with first connecting lugs, and a plurality of first connecting lugs are fixedly connected to the magnetic attraction connecting column.
5. The hydrogen detector of claim 4, wherein a plurality of first magnetic blocks are fixedly connected to the second connecting lugs, second limiting holes matched with the first magnetic blocks are formed in the first connecting lugs, a plurality of second iron sheets are fixedly connected in the second limiting holes, and the first magnetic blocks are magnetically connected with the second iron sheets in the second limiting holes.
6. The hydrogen detector of the wool making equipment according to claim 1, wherein the end face of the inner wall of the protective shell is matched with the end face of the outer side of the hydrogen detector, the protective shell is excessively hard matched with the end face of the outer side of the hydrogen detector, and the end face of the inner wall of the protective shell is provided with an anti-slip pad.
7. The hydrogen detector of claim 1, wherein the bottom end surface of the protecting device is provided with a sliding groove, a filter plate is slidably connected in the sliding groove, the filter plate comprises a pair of sliding blocks, the pair of sliding blocks slide in the sliding groove, and a plurality of filter holes are formed in the filter plate.
8. The hydrogen detector of claim 7, wherein the filter plate is fixedly connected with a pair of second magnetic attraction blocks, a first limiting hole matched with the pair of second magnetic attraction blocks is formed in the end face of the protective shell, which is contacted with the second magnetic attraction blocks, a plurality of third iron sheets are fixedly connected in the first limiting hole, and the second magnetic attraction blocks are magnetically attracted to connect the third iron sheets in the first limiting hole.
9. The hydrogen detector for a wool making apparatus according to claim 8, wherein a pulling ring is fixedly connected to an end surface of one side of the bottom of the filter plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320862249.8U CN219994980U (en) | 2023-04-18 | 2023-04-18 | Hydrogen detector of wool making equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320862249.8U CN219994980U (en) | 2023-04-18 | 2023-04-18 | Hydrogen detector of wool making equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219994980U true CN219994980U (en) | 2023-11-10 |
Family
ID=88620372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320862249.8U Active CN219994980U (en) | 2023-04-18 | 2023-04-18 | Hydrogen detector of wool making equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219994980U (en) |
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2023
- 2023-04-18 CN CN202320862249.8U patent/CN219994980U/en active Active
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