CN219459323U - Electric tracing device - Google Patents
Electric tracing device Download PDFInfo
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- CN219459323U CN219459323U CN202222846242.5U CN202222846242U CN219459323U CN 219459323 U CN219459323 U CN 219459323U CN 202222846242 U CN202222846242 U CN 202222846242U CN 219459323 U CN219459323 U CN 219459323U
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- electric heating
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- 238000009413 insulation Methods 0.000 claims abstract description 56
- 238000005485 electric heating Methods 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 26
- 230000002787 reinforcement Effects 0.000 claims abstract description 18
- 239000010410 layer Substances 0.000 claims description 142
- 239000011241 protective layer Substances 0.000 claims description 16
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 8
- 239000004964 aerogel Substances 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000002041 carbon nanotube Substances 0.000 claims description 5
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 5
- 238000007731 hot pressing Methods 0.000 claims description 5
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- 239000011248 coating agent Substances 0.000 claims description 4
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- 238000007493 shaping process Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 239000002238 carbon nanotube film Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000000835 fiber Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract description 21
- 230000008901 benefit Effects 0.000 abstract description 10
- 238000004321 preservation Methods 0.000 description 12
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- 238000009833 condensation Methods 0.000 description 5
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
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- 230000008014 freezing Effects 0.000 description 3
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- 239000000843 powder Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 2
- 229910021389 graphene Inorganic materials 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
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- 239000000428 dust Substances 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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Classifications
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
Landscapes
- Surface Heating Bodies (AREA)
Abstract
The utility model relates to the field of electric heating, and discloses an electric tracing device which comprises a heat insulation layer, an electric heating layer and an insulating layer; wherein, the heat insulation layer, the electric heating layer and the insulating layer are all flexible materials, and are overlapped in sequence and reinforced and clasped by the pricking pin; the shapes of the heat insulation layer, the electric heating layer and the insulating layer after reinforcement and cohesion are determined according to the shape of the heated device. The electric heating layer of the electric tracing device adopts the planar electric heating material, and the planar electric heating material has the advantage of uniform temperature during heating, so that the problems of nonuniform heating and easy fusing of the traditional electric heating wire mode can be effectively avoided.
Description
Technical Field
The utility model relates to the field of electric heating, in particular to an electric tracing device.
Background
The heat tracing is based on the heat transfer principle, and the heat loss of the heat tracing object is supplemented by using a high-temperature and high-energy medium, so that the heat tracing works in an effective temperature range. The electric tracing refers to converting electric energy into heat, and compensating the heat dissipated by a heat tracing object through direct or indirect heat exchange, so as to meet the working requirements of heat preservation, condensation prevention and freezing prevention.
The application of electric tracing mainly comprises the following aspects: 1. and (3) heat preservation: in some places with strict requirements on temperature, the temperature value is constant within a certain range, the temperature is prevented from changing up and down, and when the heat preservation layer cannot meet the requirements, the aim can be well achieved by applying electric tracing. 2. Anti-condensation: in some pipeline transportation processes, due to the reduction of the temperature of the external environment, heat loss of medium heat in the pipeline can lead the temperature of the medium to be lower than the condensation point of the medium so as to generate a condensation phenomenon, and the medium can be kept above the condensation point by utilizing electric tracing. 3. Antifreezing: in the outdoor pipeline transportation process, especially in northern winter cold areas, the efficacy of the heat preservation layer is gradually reduced along with the reduction of temperature and the time extension, and the temperature of liquid media such as water, milk and the like can be reduced to the freezing point, so that the temperature of the liquid media can be kept at a safe temperature above the freezing point by electric tracing.
Because of the great advantages of electric heat tracing, the electric heat tracing has become an implementation scheme for solving the heat tracing heat preservation problem in various industrial fields. However, the current electric tracing mode in the market is to directly wind an electric heating wire (belt) for heating and then wind glass fiber cloth for heat preservation. It still has a more prominent problem: firstly, the mode of winding the heating wire is easy to cause uneven temperature on the surface of a heated device, the higher the temperature required by operation is, the more obvious the temperature unevenness is, even when the working condition is more than 500 ℃, the temperature difference is larger, and normal work cannot be performed; secondly, the electric heating wire is longer in winding, and in the use process, hot spots are very easy to generate and fuse, so that the whole heating equipment stops working, no effective means is available at present to check out the hot spot positions, and therefore the whole heat tracing equipment needs to be paved again, the construction period is prolonged, and the cost is increased. Thirdly, the insulation layer and the electric heating layer are separately constructed, so that the energy consumption is increased due to poor insulation effect, and accidents caused by short circuit of the heating wire can be possibly caused when the insulation effect is serious. Fourth, compatibility with the anisotropic structure is poor, and there are disadvantages of poor expansibility, single function, and the like.
Disclosure of Invention
Aiming at the problems, the utility model aims to provide the electric tracing device which can effectively overcome the defects that the electric tracing device in the prior art has uneven heating temperature, cannot meet the middle-high temperature use working condition, does not have a heat preservation structure, has poor heating and heat preservation effects, is inconvenient to manage and maintain and lacks of heating protection on the connecting part of the opposite parts.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
an electric tracing device comprises a heat insulation layer 2, an electric heating layer 3 and an insulating layer 4; wherein,,
the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 are all flexible materials, and are overlapped in sequence and reinforced and clasped by the needles;
the shapes of the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after reinforcement and cohesion are determined according to the shape of the heated device.
In the above technical solution, the shapes of the heat insulation layer 2, the electrothermal layer 3 and the insulating layer 4 after the reinforcement and cohesion are determined according to the shape of the heated device, and the method includes:
the shapes of the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after the reinforcement and cohesion are determined by carrying out hot pressing shaping on the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after the reinforcement and cohesion of the impregnating resin in the die; wherein the mold is prepared according to the shape of the heated device.
In the above technical solution, the electrothermal layer 3 includes a temperature electrode 31, a conductive electrode 32, and a planar electrothermal film 33; wherein the temperature electrode 31 is used for detecting the real-time temperature of the planar electrothermal film 33; the conductive electrode 32 is used for providing electric energy for the planar electrothermal film 33; the planar electrothermal film 33 generates heat by the action of electric energy.
In the above technical solution, the planar electrothermal film 33 is made of any one of the following materials:
ITO conductive film, wire fiber woven planar resistance fabric, film made by coating dispersion slurry made of carbon nano tube, graphene, metal powder, conductive carbon powder and graphite powder on flexible substrate, pure carbon nano tube film and carbon nano tube polymer composite film.
In the above technical scheme, the heat insulation layer 2 is made of any one of the following materials:
dan Yingzhan alumina felt, aerogel material.
In the above technical scheme, the insulating layer 4 is glass fiber cloth coated with a coating with high infrared emission efficiency.
In the above technical scheme, the electric tracing device further comprises: a fastener 5;
the buckling piece 5 is used for installing the electric tracing device on a heated device.
In the above technical scheme, the electric tracing device further comprises: a waterproof wear-resistant protective layer 1;
the waterproof wear-resistant protective layer 1 is positioned outside the heat insulation layer 2 and used for protecting the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after reinforcement and cohesion.
In the above technical scheme, the electric tracing device further comprises: a waterproof wear-resistant protective layer 1;
the waterproof wear-resistant protective layer 1 is positioned outside the heat insulation layer 2 and used for protecting the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after reinforcement and cohesion.
In the above technical scheme, the waterproof wear-resistant protective layer 1 is a plastic shell, and a circuit connector port and a power connector are arranged on the plastic shell.
Due to the adoption of the technical scheme, the utility model has the following advantages:
the electric heating layer of the electric tracing device adopts the planar electric heating material, and the planar electric heating material has the advantage of uniform temperature during heating, so that the problems of nonuniform heating and easy fusing of the traditional electric heating wire mode can be effectively avoided; according to the electric tracing device, the heat insulation layer, the electric heating layer and the insulating layer are reinforced and cohesive through the pricking pin, so that the electric heating layer and other two layers can be tightly connected, and the problems of poor heat insulation effect and easiness in causing short circuit of the heating wire caused by separation of the heat insulation layer and the electric heating layer in the prior art can be avoided; the electric tracing device can determine the shape of the device according to the shape of the heated device, realizes compatibility of opposite structures, and has the advantage of good expansibility.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic cross-sectional view of an electric tracing apparatus of the utility model in one embodiment;
fig. 2 is a schematic perspective view of an electric tracing apparatus of the utility model in one embodiment;
FIG. 3 is a schematic diagram of the structure of an electrothermal layer in the electric tracing device of the utility model;
fig. 4 is a schematic diagram of an electric tracing apparatus of the utility model in another embodiment.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The present utility model will be described in detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic cross-sectional view of an electric tracing apparatus according to an embodiment of the present utility model, and fig. 2 is a schematic perspective view of an electric tracing apparatus according to an embodiment of the present utility model, as shown in fig. 1 and 2, the electric tracing apparatus according to the present utility model includes: the heat insulation layer 2, the electrothermal layer 3 and the insulating layer 4; wherein,,
the heat insulation layer 2, the electrothermal layer 3 and the insulating layer 4 are all made of flexible materials, and are overlapped in sequence and reinforced and clasped through the pricking needles 6;
the shapes of the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after reinforcement and cohesion are determined according to the shape of the heated device.
The heat insulation layer 2 is made of flexible materials, and can realize heat insulation effect. The heat insulating layer 2 may be made of quartz felt, alumina felt, aerogel material, etc., and in this embodiment, aerogel material is preferable. The aerogel material has the advantages of thinner thickness and high heat insulation efficiency, and is more suitable for being used in areas with limited physical space. Although aerogel materials have the problem of powder falling during use, this problem can be well solved by needle reinforcement cohesion and the impregnation process described hereinafter.
The electrothermal layer 3 is a flexible planar heating material for converting electric energy into heat energy. Fig. 3 is a schematic structural view of an electrothermal layer in the electric tracing device of the utility model, referring to fig. 3, the electrothermal layer 3 includes a temperature electrode 31, a conductive electrode 32, and a planar electrothermal film 33; wherein the temperature electrode 31 is used for detecting the real-time temperature of the planar electrothermal film 33; the conductive electrode 32 is used for providing electric energy for the planar electrothermal film 33; the planar electrothermal film 33 generates heat by the action of electric energy.
The planar electrothermal film 33 may be made of any one of the following materials: ITO conductive film, wire fiber woven planar resistance fabric, film made by coating dispersion slurry made of carbon nano tube, graphene, metal powder, conductive carbon powder and graphite powder on flexible substrate, pure carbon nano tube film and carbon nano tube polymer composite film. The preparation of the above materials is common general knowledge to a person skilled in the art, and thus, a repetitive description thereof will not be made here. The planar electrothermal film 33 has the advantage of uniform temperature during heating, and can effectively avoid the problems of nonuniform heating and easy fusing of the traditional heating wire mode.
In the present embodiment, the planar electrothermal film 33 is preferably a carbon-based material. The resistivity of the carbon-based material is adjustable, the carbon-based material can be customized according to working conditions such as the working temperature, and the like, and meanwhile, the electric heating conversion efficiency is high, so that the energy loss is reduced.
The temperature electrode 31 and the conductive electrode 32 are common knowledge to those skilled in the art, and are not further described herein.
The insulating layer 4 is used to protect the inner sheath from mechanical damage and chemical corrosion, from moisture by contact with water vapor, and from electrical shock by contact conductors. The insulating layer 4 can be realized by glass fiber cloth. In this embodiment, a glass cloth coated with a coating layer of high infrared emission efficiency is preferable to improve the heat utilization efficiency.
The heat insulation layer 2, the electrothermal layer 3 and the insulating layer 4 are sequentially overlapped from outside to inside. In order to avoid the problems of poor heat preservation effect, easy short circuit and the like caused by the separation of a common heat preservation layer and an electric heating layer in the prior art, the three are reinforced and cohesive through a puncture needle in the embodiment to form a compact three-dimensional structure. This helps to improve the heat preservation effect and also avoids the problem of short circuits. Referring to fig. 2, there are a plurality of needles which penetrate through the insulating layer 2, the electrothermal layer 3 and the insulating layer 4, respectively, in a uniformly distributed manner.
The heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 in the electric tracing device are all made of flexible materials, so that the shape of the electric tracing device can be determined according to the shape of a heated device, and the effects of heat insulation and heating are better achieved. For example, if a certain heated device is in a sphere shape and the electric tracing device is in a cylindrical shape, part of the surface of the heated device cannot be covered by the electric tracing device, so that the heat preservation and heating of the heated device are affected. Thus, the electric tracing apparatus of the present utility model may be made in a hollow sphere shape so that it can completely cover the surface of the heated device.
Specifically, in this embodiment, a mold may be designed and prepared according to the shape of the heated device, then the heat insulation layer 2, the electrothermal layer 3 and the insulating layer 4 after the spike reinforcement and cohesion are put into the mold, and then the resin 7 is added into the mold, so that the heat insulation layer 2, the electrothermal layer 3 and the insulating layer 4 after the spike reinforcement and cohesion are all immersed in the resin 7; finally, the shapes of the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 are fixed through hot pressing shaping.
For example, the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 are rectangular initially, and are placed in a spherical mold after being reinforced and clasped by the needles, so that the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after being reinforced and clasped by the needles are spherical; and then adding resin into the mould, carrying out hot pressing shaping on the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after the needle is reinforced and cohesive by using the resin, and finally taking out the spherical heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after the needle is reinforced and cohesive from the mould.
The electric heating layer of the electric tracing device adopts the planar electric heating material, and the planar electric heating material has the advantage of uniform temperature during heating, so that the problems of nonuniform heating and easy fusing of the traditional electric heating wire mode can be effectively avoided; according to the electric tracing device, the heat insulation layer, the electric heating layer and the insulating layer are reinforced and cohesive through the pricking pin, so that the electric heating layer and other two layers can be tightly connected, and the problems of poor heat insulation effect and easiness in causing short circuit of the heating wire caused by separation of the heat insulation layer and the electric heating layer in the prior art can be avoided; the electric tracing device can determine the shape of the device according to the shape of the heated device, realizes compatibility of opposite structures, and has the advantage of good expansibility.
Based on any of the foregoing embodiments, in this embodiment, the electric tracing apparatus further includes: a fastener 5;
the buckling piece 5 is used for installing the electric tracing device on a heated device.
The heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 are reinforced and clasped by the needles and are hot-pressed and shaped, and then the heat insulation layer, the electric heating layer and the insulating layer can be arranged on a heated device. In order to ensure the close contact degree between the electric tracing device and the heated device, so that heat can be conducted rapidly, the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 which are fastened and bonded by the needles and subjected to hot pressing can be fixed together with the heated device by the buckling piece 5.
The shape and structure of the fastener 5 can be any known in the art, and is not further limited in the present utility model.
According to the electric tracing device, the electric tracing device and the heated device are fixed together through the buckling piece, so that heat generated by the electric tracing device can be rapidly conducted to the heated device, and the connection stability degree between the electric tracing device and the heated device is improved.
Based on any of the above embodiments, fig. 4 is a schematic diagram of an electric tracing apparatus according to another embodiment of the present utility model. As shown in fig. 4, in this embodiment, the electric tracing apparatus further includes: a waterproof wear-resistant protective layer 1;
the waterproof wear-resistant protective layer 1 is positioned outside the heat insulation layer 2 and used for protecting the heat insulation layer 2, the electric heating layer 3 and the insulating layer 4 after reinforcement and cohesion.
Because the working environment of the heated device may be severe, in this embodiment, a waterproof wear-resistant protective layer is further disposed outside the heat insulation layer. The waterproof wear-resistant protective layer can prevent water (such as rainwater, snow water, fog water and the like) in the external environment from invading the electric tracing device or the heated device on one hand, and can prevent sand, dust and the like in the external environment from invading the electric tracing device or the heated device on the other hand.
In this embodiment, the waterproof wear-resistant protective layer 1 is a plastic housing on which a line connector port and a power connector are mounted. In other embodiments, the waterproof wear-resistant protection layer 1 may be made of other materials, such as a stainless steel shell, etc.
The electric tracing device can prevent objects in the external environment from invading the electric tracing device or a heated device through the waterproof wear-resistant protective layer.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The electric tracing device is characterized by comprising a heat insulation layer (2), an electric heating layer (3) and an insulating layer (4); wherein,,
the heat insulation layer (2), the electric heating layer (3) and the insulating layer (4) are all flexible materials, and are overlapped in sequence and reinforced and clasped through the pricking needles;
the shapes of the heat insulation layer (2), the electric heating layer (3) and the insulating layer (4) after reinforcement and cohesion are determined according to the shape of the heated device.
2. The electric tracing apparatus according to claim 1, wherein the shape of said heat insulation layer (2), electric heating layer (3) and insulating layer (4) after said reinforcement and cohesion is determined according to the shape of the heated device, comprising:
the shapes of the heat insulation layer (2), the electric heating layer (3) and the insulating layer (4) after the reinforcement and cohesion are determined by carrying out hot pressing shaping on the heat insulation layer (2), the electric heating layer (3) and the insulating layer (4) after the reinforcement and cohesion of the impregnating resin in the die; wherein the mold is prepared according to the shape of the heated device.
3. The electric tracing apparatus according to claim 1, wherein said electrothermal layer (3) comprises a temperature electrode (31), a conductive electrode (32) and a planar electrothermal film (33); wherein the temperature electrode (31) is used for detecting the real-time temperature of the planar electrothermal film (33); the conductive electrode (32) is used for providing electric energy for the planar electrothermal film (33); the planar electrothermal film (33) heats under the action of electric energy.
4. An electric heating device according to claim 3, characterized in that the planar electrothermal film (33) is made of any one of the following materials:
IT0 conductive film, wire fiber woven planar resistance fabric, pure carbon nanotube film and carbon nanotube polymer composite film.
5. The electric tracing device according to claim 1, wherein the heat insulation layer (2) is made of any one of the following materials:
dan Yingzhan alumina felt, aerogel material.
6. The electric tracing apparatus according to claim 1, wherein the insulating layer (4) is a glass cloth coated with a coating of high infrared emission efficiency.
7. An electric tracing apparatus according to any one of claims 1 to 6, wherein said electric tracing apparatus further comprises: a fastener (5);
the buckling piece (5) is used for installing the electric tracing device on a heated device.
8. An electric tracing apparatus according to any one of claims 1 to 6, wherein said electric tracing apparatus further comprises: a waterproof wear-resistant protective layer (1);
the waterproof wear-resistant protective layer (1) is positioned outside the heat insulation layer (2) and used for protecting the heat insulation layer (2), the electric heating layer (3) and the insulating layer (4) after reinforcement and cohesion.
9. The electrical tracing apparatus of claim 7, wherein said electrical tracing apparatus further comprises: a waterproof wear-resistant protective layer (1);
the waterproof wear-resistant protective layer (1) is positioned outside the heat insulation layer (2) and used for protecting the heat insulation layer (2), the electric heating layer (3) and the insulating layer (4) after reinforcement and cohesion.
10. The electric tracing apparatus according to claim 9, wherein the waterproof wear-resistant protective layer (1) is a plastic housing, and the plastic housing is provided with a line connector port and a power connector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222846242.5U CN219459323U (en) | 2022-10-27 | 2022-10-27 | Electric tracing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222846242.5U CN219459323U (en) | 2022-10-27 | 2022-10-27 | Electric tracing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219459323U true CN219459323U (en) | 2023-08-01 |
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ID=87380847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222846242.5U Active CN219459323U (en) | 2022-10-27 | 2022-10-27 | Electric tracing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219459323U (en) |
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2022
- 2022-10-27 CN CN202222846242.5U patent/CN219459323U/en active Active
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