CN219643407U - Ventilation structure for box-type transformer substation - Google Patents
Ventilation structure for box-type transformer substation Download PDFInfo
- Publication number
- CN219643407U CN219643407U CN202320500511.4U CN202320500511U CN219643407U CN 219643407 U CN219643407 U CN 219643407U CN 202320500511 U CN202320500511 U CN 202320500511U CN 219643407 U CN219643407 U CN 219643407U
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- Prior art keywords
- transformer substation
- air inlet
- air
- ventilation
- assembly
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- 238000009423 ventilation Methods 0.000 title claims abstract description 76
- 238000010521 absorption reaction Methods 0.000 claims description 30
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 claims description 26
- 239000002274 desiccant Substances 0.000 claims description 17
- 229910001629 magnesium chloride Inorganic materials 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 9
- 238000001035 drying Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 8
- 238000005457 optimization Methods 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables
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- Drying Of Gases (AREA)
Abstract
The utility model discloses a ventilation structure for a box-type transformer substation, which belongs to the technical field of the box-type transformer substation and has the technical scheme that a ventilation assembly is arranged in the transformer substation, an air outlet assembly is arranged at the inner bottom of the ventilation assembly, moisture can be received when air is extracted and enters through the ventilation assembly, the air is dried, the internal equipment of the transformer substation, which is caused by excessive moisture in the transformer substation, is prevented from being corroded due to damp, meanwhile, the ventilation assembly can enable the dry air to slow down the quantity of the air inlet and increase the pressure of the air inlet in the drying process, the air can be discharged into the transformer substation through the air outlet assembly, the air can be accelerated when entering the transformer substation, the ventilation assembly can be fixed at the inner top of the transformer substation through a fixing assembly, the top of the transformer substation can not be corroded by rainwater through a rain shielding assembly, the rain shielding assembly can determine whether the transformer substation is installed or not according to whether the transformer substation is placed indoors or outdoors.
Description
Technical Field
The utility model relates to the technical field of box-type substations, in particular to a ventilation structure for a box-type substation.
Background
The utility model provides a box-type transformer substation, called prefabricated substation again or prefabricated substation, box-type transformer substation is applicable to residential district, public transformer in city, flourishing downtown, construction power etc. generally all builds a ground, then builds a protection casing on the ground, and protection casing internally mounted has a plurality of transformers and other electronic components, accomplishes the vary voltage operation through the cooperation between each components, because its compact structure, consequently ventilation heat dissipation condition is especially important, especially under adverse weather condition, if can not dispel the heat the cooling fast, just can not ensure equipment normal operating, even destroys the safety and stability of electric wire netting, causes very big economic loss.
The current announcements are: CN213196881U, chinese patent of utility model, disclose a ventilation structure for box-type substation, which comprises a base, both sides above the base are equipped with side plates, openings are all opened on the side plates, partition plates are all embedded in the openings, air inlet holes are uniformly opened on the partition plates, both ends of the openings are all longitudinally opened with sliding grooves, cover plates are all arranged in the sliding grooves, upper fixing plates are all arranged at the upper ends of the openings, lower fixing plates are all arranged at the lower ends of the openings, screw rods are all arranged between the upper fixing plates and the lower fixing plates, a first motor is arranged in the middle above the upper fixing plates and at the positions corresponding to the screw rods, a top plate is arranged above the side plates, a first ventilation box is arranged on one side above the top plate, a first ventilation opening is opened on one side above the top plate and at the positions corresponding to the first ventilation box, a first exhaust fan is arranged above the first ventilation opening, and a second motor is arranged above the first exhaust fan; when ventilation is needed to be carried out in the transformer substation, the first motor drives the screw rod to work so as to drive the cover plate to slide downwards along the sliding groove, and the air inlet hole is ensured to be used for air inlet.
Although the patent can prevent dust from entering when the transformer substation is not ventilated, the closed air inlet pipe cannot block the entry of humid gas, and the time of the transformer substation belongs to a ventilated state, so that the problems of ventilation in the transformer substation and heat dissipation of equipment in the transformer substation are not utilized.
Disclosure of Invention
1. Technical problem to be solved
The utility model provides a ventilation structure for a box-type transformer substation, and aims to solve the problems that an existing closed air inlet pipe cannot block the entry of humid air, and the time of the transformer substation belongs to a ventilation state, so that the ventilation structure is not used for ventilation in the transformer substation and heat dissipation of equipment in the transformer substation is affected.
2. Technical proposal
The utility model discloses a ventilation structure for a box-type transformer substation, which comprises a transformer substation, wherein a ventilation assembly is arranged in the transformer substation, an air outlet assembly is arranged at the inner bottom of the ventilation assembly, a fixing assembly is arranged at the bottom of the ventilation assembly, and a rain shielding assembly is arranged at the top of the transformer substation;
the ventilation assembly comprises an air inlet pipe, an air inlet fan, a moisture absorption plate and an air inlet hole, wherein the air inlet pipe is connected to the inner top of the transformer substation in a clamping mode, the air inlet fan is connected to one end of the air inlet pipe in a bolting mode, the moisture absorption plate is connected to the inner portion of the air inlet pipe in a clamping mode, and the air inlet hole is formed in the moisture absorption plate in a plurality of mode.
In order to enable the air entering the air inlet pipe to be discharged out of the air inlet pipe, as a ventilation structure for the box-type transformer substation, the air outlet assembly preferably comprises an air outlet fan, an air outlet plate and air outlet holes, wherein the air outlet fan is bolted to the inner bottom wall of the air inlet pipe, the air outlet plate is bolted to the bottom of the air outlet fan, the air outlet holes are formed in the bottom of the air outlet plate and are in a circumferential array, and the air outlet fan is positioned on one side of the moisture absorption plate.
In order to achieve the effect that the air inlet pipe can be fixed, as a ventilation structure for a box-type transformer substation, the fixing assembly preferably comprises a fixing plate, a fixing bolt and a fixing nut, wherein the fixing plate is arranged at the bottom of the air inlet pipe, the fixing bolt sequentially penetrates through the top of the fixing plate and the top of the transformer substation, and the fixing nut is in threaded connection with the top of the fixing bolt and is positioned at the top of the transformer substation.
In order to enable the top of the transformer substation to be rainproof, as a ventilation structure for a box-type transformer substation, the rain shielding assembly preferably comprises a rain shielding column and a rain shielding canopy, wherein the rain shielding column is welded to the top of the transformer substation, and the rain shielding column is bolted to the top of the rain shielding column.
In order to enable the air to absorb moisture through the moisture absorption plate, the ventilation structure for the box-type transformer substation is preferable in that a blocking rod is arranged in the top of the air inlet hole, a plurality of blocking rods are horizontally arrayed in the air inlet hole, and the cross section of the air inlet hole is elliptical.
In order to enable air in the transformer substation to be discharged out of the transformer substation and prevent dust from entering the transformer substation, as a ventilation structure for a box-type transformer substation, a ventilation fan is preferably bolted to one side of the transformer substation, the ventilation fan is located on one side of an air inlet pipe, and a filter screen is arranged at one end of the ventilation fan.
In order to make the moisture absorption performance of the moisture absorption plate stronger, the ventilation structure for the box-type transformer substation is preferably made of a magnesium chloride drying agent, wherein the magnesium chloride drying agent has chemical moisture absorption, and the magnesium chloride drying agent chemically reacts with moisture in the air to form another substance, and captures and absorbs the moisture.
In order to prevent dust from entering the air inlet pipe when the air inlet fan extracts air, the ventilation structure for the box-type transformer substation is preferable in the utility model, a dustproof net is bolted to one side of the air inlet fan, and the dustproof net is made of dustproof sponge.
3. Advantageous effects
Compared with the prior art, the utility model has the beneficial effects that:
this ventilation structure for box-type substation, through setting up ventilation unit, the air-out subassembly, fixed subassembly and hide rain subassembly, can receive moisture when making the air extraction get into through ventilation unit, make the air drying, prevent the too much substation internal equipment that leads to of transformer substation internal steam because of the corrosion that wets, ventilation unit also can make the dry air slow down the quantity of air inlet and the atmospheric pressure that the increase was admitted air in the drying process simultaneously, can make the exhaust of dry air increase atmospheric pressure advance transformer substation through the air-out subassembly, can accelerate when making the air get into the transformer substation, make ventilation unit can be fixed at the interior top of transformer substation through fixed subassembly, can make the top of transformer substation can not be erodeed by the rainwater through hiding the rain subassembly, accomplish the effect of keeping off the rain, hide the rain subassembly and can be according to placing indoor or outdoor and decide whether install.
Drawings
FIG. 1 is an overall block diagram of the present utility model;
FIG. 2 is a schematic view in left side perspective cross section of the present utility model;
FIG. 3 is a schematic view of a ventilation assembly and an air outlet assembly of the present utility model;
FIG. 4 is a schematic view of a mounting assembly of the present utility model;
FIG. 5 is a schematic view of a moisture absorbing sheet and blocking lever of the present utility model;
fig. 6 is a right-side view of the present utility model.
The reference numerals in the figures illustrate:
1. a transformer station; 2. a ventilation assembly; 3. an air outlet assembly; 4. a fixing assembly; 5. a rain shielding assembly; 6. a blocking lever; 7. a ventilation fan; 8. a filter screen; 201. an air inlet pipe; 202. an inlet fan; 203. a moisture absorption plate; 204. an air inlet hole; 301. a fan is arranged; 302. an air outlet plate; 303. an air outlet hole; 401. a fixing plate; 402. a fixing bolt; 403. a fixing nut; 501. rain shielding column; 502. rain shelter.
Detailed Description
The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, in the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1-6, the present utility model provides the following technical solutions: the utility model provides a ventilation structure for box-type substation, includes transformer substation 1, and the inside of transformer substation 1 is provided with ventilation subassembly 2, and ventilation subassembly 2's inner bottom is provided with air-out subassembly 3, and ventilation subassembly 2's bottom is provided with fixed subassembly 4, and transformer substation 1's top is provided with and hides rain subassembly 5;
the ventilation assembly 2 comprises an air inlet pipe 201, an air inlet fan 202, a moisture absorption plate 203 and an air inlet hole 204, wherein the air inlet pipe 201 is clamped at the inner top of the transformer substation 1, the air inlet fan 202 is bolted at one end of the air inlet pipe 201, the moisture absorption plate 203 is clamped inside the air inlet pipe 201, and a plurality of air inlet holes 204 are formed inside the moisture absorption plate 203.
In this embodiment: through setting up ventilation module 2, air-out subassembly 3, fixed subassembly 4 and rain shielding subassembly 5, can receive moisture when making the air extraction get in through ventilation module 2, make the air dry, prevent the inside equipment of transformer substation 1 that the excessive steam of transformer substation 1 leads to because of being wet corrosion, simultaneously ventilation module 2 also can make the dry air slow down the quantity of air inlet and increase the atmospheric pressure that admits air in the drying process, can make the exhaust of dry air increase atmospheric pressure enter transformer substation 1 through air-out subassembly 3, can accelerate when making the air get into transformer substation 1, make ventilation module 2 can be fixed in the interior top of transformer substation 1 through fixed subassembly 4, can make the top of transformer substation 1 can not be eroded by the rainwater through rain shielding subassembly 5, accomplish the effect of keeping off the rain, rain shielding subassembly 5 can be according to whether place indoor or outdoor and decide whether install; through setting up air-supply line 201, air inlet fan 202, moisture absorption board 203 and fresh air inlet 204, air inlet fan 202 extraction outside air gets into air-supply line 201, and the air passes through air-supply line 201 and gets into the moisture absorption hole in the moisture absorption board 203 this moment, and the drier inside moisture absorption board 203 absorbs the moisture in the air this moment, can not cause the inside corrosion of equipment because of the moisture is heavy when making the air get into transformer substation 1.
As a technical optimization scheme of the utility model, the air outlet assembly 3 comprises an air outlet fan 301, an air outlet plate 302 and an air outlet hole 303, wherein the air outlet fan 301 is bolted to the inner bottom wall of the air inlet pipe 201, the air outlet plate 302 is bolted to the bottom of the air outlet fan 301, the air outlet hole 303 is arranged at the bottom of the air outlet plate 302 and in a circumferential array, and the air outlet fan 301 is positioned at one side of the moisture absorbing plate 203.
In this embodiment: by providing the air outlet fan 301, the air outlet plate 302 and the air outlet holes 303, the air outlet fan 301 draws the dry air in the air inlet pipe 201, and when the dry air passes through the air outlet plate 302, the pressure is increased due to the narrow air outlet holes 303 and is rapidly discharged into the transformer substation 1.
As a technical optimization scheme of the utility model, the fixing assembly 4 comprises a fixing plate 401, a fixing bolt 402 and a fixing nut 403, wherein the fixing plate 401 is arranged at the bottom of the air inlet pipe 201, the fixing bolt 402 sequentially penetrates through the top of the fixing plate 401 and the top of the transformer substation 1, and the fixing nut 403 is in threaded connection with the top of the fixing bolt 402 and is positioned at the top of the transformer substation 1.
In this embodiment: through setting up fixed plate 401, dead bolt 402 and fixation nut 403, pass fixed plate 401 and transformer substation 1 top in proper order through the fixing bolt, fixation nut 403 is twisted at the top of fixing bolt through transformer substation 1 top one end, and fixed plate 401 fixes the interior top of air-supply line 201 at transformer substation 1 this moment.
As a technical optimization scheme of the utility model, the rain shielding assembly 5 comprises a rain shielding column 501 and a rain shielding shed 502, wherein the rain shielding column 501 is welded at the top of the transformer substation 1, and the rain shielding column 501 is bolted at the top of the rain shielding column 501.
In this embodiment: by providing the rain post 501 and the canopy 502 such that rainwater does not fall to the top of the substation 1, the canopy 502 can be installed according to the need.
As a technical optimization scheme of the utility model, a blocking rod 6 is arranged in the top of the air inlet 204, a plurality of blocking rods 6 are horizontally arrayed in the air inlet 204, and the cross section of the air inlet 204 is elliptical.
In this embodiment: by providing the blocking lever 6, the air pressure is increased due to the small space in the moisture absorption hole when air enters the moisture absorption plate 203, and the contact area between the moisture absorption plate 203 and the air is also increased.
As a technical optimization scheme of the utility model, one side of the transformer substation 1 is bolted with the ventilation fan 7, the ventilation fan 7 is positioned on one side of the air inlet pipe 201, and one end of the ventilation fan 7 is provided with the filter screen 8.
In this embodiment: through setting up ventilation fan 7 and filter screen 8 to the air discharge body of transformer substation 1, accomplish the inside circulation of air of transformer substation 1 this moment.
As a technical optimization scheme of the utility model, the material of the moisture absorbing plate 203 is magnesium chloride drying agent, the magnesium chloride drying agent has chemical moisture absorption, and the magnesium chloride drying agent chemically reacts with moisture in the air to form another substance, and the magnesium chloride drying agent captures and absorbs the moisture.
In this embodiment: the moisture absorbing plate 203 provided with the magnesium chloride drying agent has better moisture absorbing effect, and the common adsorption silica gel drying agent and the mineral drying agent only temporarily store the moisture in the air in the micropores of the common adsorption silica gel drying agent and the mineral drying agent, so that the moisture can be reversely spit out when the air humidity is low. The magnesium chloride desiccant is a chemical hygroscopic material that chemically reacts with moisture in the air to form another substance, so that no anti-water-spouting phenomenon occurs. In addition, no matter how low the humidity of the air is, the magnesium chloride desiccant can capture and absorb the moisture as long as the moisture exists in the air, so that the magnesium chloride desiccant can create a dry environment and is a good choice for industries with strict requirements on the humidity.
As a technical optimization scheme of the utility model, one side of the air inlet fan 202 is bolted with the dustproof net 9, and the dustproof net 9 is made of dustproof sponge.
In this embodiment: the dustproof effect can be effectively achieved by arranging the dustproof net 9 made of dustproof sponge materials.
Working principle: firstly, the air inlet fan 202 draws outside air and enters the air inlet pipe 201, at this time, the air passes through the air inlet pipe 201 and enters the moisture absorption holes in the moisture absorption plate 203, at this time, the drying agent in the moisture absorption plate 203 absorbs moisture in the air, so that the inside of the equipment is not rusted due to heavy moisture when the air enters the transformer substation 1, the air outlet fan 301 draws dry air in the air inlet pipe 201, when the dry air passes through the air outlet plate 302, the pressure is quickly discharged into the inside of the transformer substation 1 in a narrow and increased manner for the air outlet holes 303, the fixing bolts sequentially pass through the fixing plate 401 and the top of the transformer substation 1, the fixing nuts 403 are screwed on the top of one end of the fixing bolts, at this time, the fixing plate 401 fixes the air inlet pipe 201 on the inner top of the transformer substation 1, the rain shielding post 501 and the rain shielding shed 502 are arranged, whether the rain shielding shed 502 is installed or not is determined according to requirements, the contact area between the air absorption plate 203 and the air filtering net is increased due to small space in the moisture absorption holes when the air enters the moisture absorption plate 203 is arranged, the air filtering net is arranged, the air is discharged out of the body of the transformer substation 1 through the ventilation fans 7 and 8, the ventilation effect of the air in the transformer substation 1 is achieved, and the ventilation effect of the magnesium chloride ventilation plate 203 is good.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.
Claims (8)
1. The utility model provides a ventilation structure for box-type substation, includes transformer substation (1), its characterized in that: the intelligent transformer substation is characterized in that a ventilation assembly (2) is arranged in the transformer substation (1), an air outlet assembly (3) is arranged at the inner bottom of the ventilation assembly (2), a fixing assembly (4) is arranged at the bottom of the ventilation assembly (2), and a rain shielding assembly (5) is arranged at the top of the transformer substation (1);
the ventilation assembly (2) comprises an air inlet pipe (201), an air inlet fan (202), a moisture absorption plate (203) and an air inlet hole (204), wherein the air inlet pipe (201) is connected to the inner top of the transformer substation (1) in a clamping mode, the air inlet fan (202) is connected to one end of the air inlet pipe (201) in a bolting mode, the moisture absorption plate (203) is connected to the inner portion of the air inlet pipe (201) in a clamping mode, and the air inlet holes (204) are formed in the inner portion of the moisture absorption plate (203) in a clamping mode.
2. A ventilation structure for a box-type substation according to claim 1, characterized in that: the air outlet assembly (3) comprises an air outlet fan (301), an air outlet plate (302) and an air outlet hole (303), wherein the air outlet fan (301) is bolted to the inner bottom wall of the air inlet pipe (201), the air outlet plate (302) is bolted to the bottom of the air outlet fan (301), the air outlet hole (303) is formed in the bottom of the air outlet plate (302) and in a circumferential array, and the air outlet fan (301) is located on one side of the moisture absorption plate (203).
3. A ventilation structure for a box-type substation according to claim 1, characterized in that: the fixing assembly (4) comprises a fixing plate (401), a fixing bolt (402) and a fixing nut (403), wherein the fixing plate (401) is arranged at the bottom of the air inlet pipe (201), the fixing bolt (402) sequentially penetrates through the top of the fixing plate (401) and the top of the transformer substation (1), and the fixing nut (403) is in threaded connection with the top of the fixing bolt (402) and located at the top of the transformer substation (1).
4. A ventilation structure for a box-type substation according to claim 1, characterized in that: the rain shielding assembly (5) comprises a rain shielding column (501) and a rain shielding canopy (502), wherein the rain shielding column (501) is welded at the top of the transformer substation (1), and the rain shielding column (501) is bolted at the top of the rain shielding column (501).
5. A ventilation structure for a box-type substation according to claim 1, characterized in that: the top inside of the air inlet hole (204) is provided with a blocking rod (6), a plurality of blocking rods (6) are horizontally arrayed in the air inlet hole (204), and the cross section of the air inlet hole (204) is elliptical.
6. A ventilation structure for a box-type substation according to claim 1, characterized in that: one side bolt of transformer substation (1) has ventilation fan (7), ventilation fan (7) are located one side of air-supply line (201), one end of ventilation fan (7) is provided with filter screen (8).
7. A ventilation structure for a box-type substation according to claim 1, characterized in that: the moisture absorbing plate (203) is made of magnesium chloride drying agent.
8. A ventilation structure for a box-type substation according to claim 1, characterized in that: one side of the air inlet fan (202) is bolted with a dustproof net (9), and the dustproof net (9) is made of dustproof sponge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320500511.4U CN219643407U (en) | 2023-03-15 | 2023-03-15 | Ventilation structure for box-type transformer substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320500511.4U CN219643407U (en) | 2023-03-15 | 2023-03-15 | Ventilation structure for box-type transformer substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219643407U true CN219643407U (en) | 2023-09-05 |
Family
ID=87808970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320500511.4U Active CN219643407U (en) | 2023-03-15 | 2023-03-15 | Ventilation structure for box-type transformer substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219643407U (en) |
-
2023
- 2023-03-15 CN CN202320500511.4U patent/CN219643407U/en active Active
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