CN214334075U - Structure of temperature measuring cable in ground temperature monitoring system of soil source ground source heat pump - Google Patents
Structure of temperature measuring cable in ground temperature monitoring system of soil source ground source heat pump Download PDFInfo
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- CN214334075U CN214334075U CN202120546498.7U CN202120546498U CN214334075U CN 214334075 U CN214334075 U CN 214334075U CN 202120546498 U CN202120546498 U CN 202120546498U CN 214334075 U CN214334075 U CN 214334075U
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Abstract
The utility model discloses a temperature measuring cable structure in a soil source ground source heat pump ground temperature monitoring system, which comprises a lower vertical sleeve mechanism, a horizontal sleeve mechanism, an upper vertical sleeve mechanism and a temperature measuring cable; the lower vertical sleeve mechanism comprises a PE single U head, a plurality of first vertical PE sleeves and a plurality of second vertical PE sleeves, the horizontal sleeve mechanism comprises a plurality of first horizontal PE sleeves and a plurality of second horizontal PE sleeves, the first horizontal PE sleeves and the second horizontal PE sleeves are sequentially connected, the upper vertical sleeve mechanism comprises a first upper vertical sleeve and a second upper vertical sleeve, leads are arranged in the second vertical PE sleeves, the second horizontal PE sleeves and the second upper vertical sleeves, and the temperature measuring cable is located in the first vertical PE sleeves, the first horizontal PE sleeves and the first upper vertical sleeves. The utility model discloses simple structure can increase substantially work efficiency, and the temperature measurement cable of convenient change or maintenance damage.
Description
Technical Field
The utility model belongs to the technical field of ground source heat pump ground temperature monitoring system, especially, relate to a structure of temperature measurement cable among ground source heat pump ground temperature monitoring system.
Background
At present, with the improvement of living standard of people, building energy consumption is increasing day by day, and in some cities of China, energy consumed by refrigeration in summer and heating in winter accounts for about half of total energy consumption of buildings, so that the finding of an energy-saving technology which can reduce primary energy consumption and has high efficiency is particularly important. The ground source heat pump system is a high-efficiency energy-saving air conditioning system which utilizes shallow geothermal energy resources, has the advantages of sustainable utilization, high efficiency, energy conservation, low operation cost and the like, can supply heat and refrigerate, and is rapidly applied in recent years; the soil source ground source heat pump system is mainly used, and the main direction for developing and utilizing shallow layer ground temperature energy is provided. However, the original temperature field of the soil is caused by imbalance of heat release and heat absorption of a geothermal energy heat exchange system in the soil source ground source heat pump system, so that the system efficiency is reduced, a long-acting ground temperature monitoring system is established, the soil temperature change rule is monitored, the attenuation of the soil heat exchange capacity is controlled by adopting reasonable measures, and the long-term high-efficiency operation of the soil source ground source heat pump system is ensured.
The structure of the temperature measuring cable in the existing ground source heat pump ground temperature monitoring system basically has two types: one is to bind the temperature measuring cable outside the heat exchange tube and embed it; the other is to arrange the temperature measuring cable in a sleeve by only arranging a single vertical sleeve. The former cannot ensure that the temperature measuring cable from the vertical shaft to the inspection opening and the temperature measuring cable in the equipment room are continuous and uninterrupted and cannot be replaced when the construction is carried out in stages; although the protection sleeve is arranged on the temperature measurement cable, the temperature measurement cable can be replaced, but the temperature measurement cable cannot be replaced when the horizontal pipe sleeve is buried for a long distance.
Therefore, the structure of the temperature measuring cable in the soil source ground source heat pump ground temperature monitoring system is lacked, the structure is simple, the design is reasonable, and the damaged temperature measuring cable is convenient to replace or maintain.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that not enough among the above-mentioned prior art is directed against, provide a temperature measurement cable's among soil source ground source heat pump ground temperature monitoring system structure, its simple structure, reasonable in design, the temperature measurement cable of convenient change or maintenance damage, the practicality is strong.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a structure of temperature measurement cable among ground source heat pump ground temperature monitoring system which characterized in that: the temperature measuring device comprises a lower vertical sleeve mechanism, a horizontal sleeve mechanism and an upper vertical sleeve mechanism which are buried underground, and temperature measuring cables which penetrate through the lower vertical sleeve mechanism, the horizontal sleeve mechanism and the upper vertical sleeve mechanism;
the lower vertical sleeve mechanism comprises a PE single U head, a first vertical PE sleeve connected with one end of the PE single U head and a second vertical PE sleeve connected with the other end of the PE single U head, wherein the number of the first vertical PE sleeves is multiple, and the number of the second vertical PE sleeves is multiple;
the horizontal sleeve mechanism comprises a plurality of first horizontal PE sleeves and a plurality of second horizontal PE sleeves which are sequentially connected;
the upper vertical sleeve mechanism comprises a first upper vertical sleeve and a second upper vertical sleeve, the first upper vertical sleeve penetrates out of a first inspection hole on the ground, the second upper vertical sleeve penetrates out of a second inspection hole on the ground, the first vertical PE sleeve, the first horizontal PE sleeve and the first upper vertical sleeve are sequentially communicated, the second vertical PE sleeve, the second horizontal PE sleeve and the second upper vertical sleeve are sequentially communicated, the second vertical PE sleeve, the second horizontal PE sleeve and the second upper vertical sleeve are provided with lead wires, the temperature measuring cable is positioned in the first vertical PE sleeve, the first horizontal PE sleeve and the first upper vertical sleeve, and one end of the lead wire and the temperature measuring probe at the bottom end of the temperature measuring cable are bound through a rope clamp, the other end of the lead wire extends out of the second upper vertical sleeve, and the top end of the temperature measuring cable extends out of the second upper vertical sleeve.
The structure of the temperature measuring cable in the soil source ground source heat pump ground temperature monitoring system is characterized in that: two adjacent first vertical PE sleeves are connected through a first vertical PE movable joint, and each first vertical PE movable joint comprises a first PE outer wire joint arranged on one first vertical PE sleeve and a first PE inner wire joint arranged on the other first vertical PE sleeve;
two adjacent vertical PE sleeve pipes of second pass through the connection of the vertical PE loose joint of second, the vertical PE loose joint of second is including setting up the outer silk joint of second PE on a vertical PE sleeve pipe of second and setting up the interior silk joint of second PE on another vertical PE sleeve pipe of second.
The structure of the temperature measuring cable in the soil source ground source heat pump ground temperature monitoring system is characterized in that: two adjacent first horizontal PE sleeves are connected through a first horizontal PE movable joint, and each first horizontal PE movable joint comprises a first PE outer wire joint arranged on one first horizontal PE sleeve and a first PE inner wire joint arranged on the other first horizontal PE sleeve;
two adjacent second horizontal PE sleeves are connected through a second horizontal PE movable joint, and the second horizontal PE movable joint comprises a second PE outer wire joint arranged on one second horizontal PE sleeve and a second PE inner wire joint arranged on the other second horizontal PE sleeve.
The structure of the temperature measuring cable in the soil source ground source heat pump ground temperature monitoring system is characterized in that: the first vertical PE casing pipe at the uppermost end is connected with the first horizontal PE casing pipe through a first lower elbow, the second vertical PE casing pipe at the uppermost end is connected with the second horizontal PE casing pipe through a second lower elbow, the first horizontal PE casing pipe is connected with the first upper vertical casing pipe through a first upper elbow, and the second horizontal PE casing pipe is connected with the second upper vertical casing pipe through a second upper elbow.
The structure of the temperature measuring cable in the soil source ground source heat pump ground temperature monitoring system is characterized in that: the first vertical PE casing pipe and the second vertical PE casing pipe are symmetrically arranged, and the horizontal distance between the first horizontal PE casing pipe and the second horizontal PE casing pipe is 0-30 mm;
the top end of the first upper vertical sleeve is 10-20 cm higher than the top end of the first inspection hole, and the top end of the second upper vertical sleeve is 10-20 cm higher than the top end of the second inspection hole.
The structure of the temperature measuring cable in the soil source ground source heat pump ground temperature monitoring system is characterized in that: the top of the first upper vertical sleeve is provided with a first cover plate, the top of the second upper vertical sleeve is provided with a second cover plate, the first cover plate is provided with a first wire passing hole, and the second cover plate is provided with a second wire passing hole.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses set up down vertical sleeve pipe mechanism, horizontal sleeve pipe mechanism and last vertical sleeve pipe mechanism, be in order to improve the scope of laying of temperature measurement cable to soil source ground source heat pump ground temperature monitoring system's application range has been improved.
2. The utility model discloses set up vertical sleeve pipe mechanism includes the single U head of PE, the vertical PE sleeve pipe of first vertical PE sleeve pipe and second down, and horizontal sleeve pipe mechanism includes the vertical sleeve pipe in first upper portion and the vertical sleeve pipe in second upper portion, goes up vertical sleeve pipe mechanism and includes the vertical sleeve pipe in first upper portion and the vertical sleeve pipe in second upper portion, through the vertical PE sleeve pipe of first vertical PE sleeve pipe, the vertical sleeve pipe in first horizontal PE sleeve pipe, first upper portion communicate in proper order and realize wearing to establish of temperature measurement cable, through the vertical PE sleeve pipe of second, the horizontal PE sleeve pipe of second, the vertical sleeve pipe in second upper portion communicates in proper order and realizes wearing to establish of lead wire.
3. The utility model is provided with the lead wire, so that the other end of the lead wire extending out of the second upper vertical sleeve is pulled, so that the temperature probe at the bottom end of the temperature measurement cable moves along the first upper vertical sleeve, the first horizontal PE sleeve and the first vertical PE sleeve until the temperature probe at the bottom end of the temperature measurement cable is flush with the bottom end of the first vertical PE sleeve at the lowest end, thereby realizing the arrangement of the temperature measurement cable; on the contrary, when the temperature measurement cable needs to be replaced or maintained, the end part of the temperature measurement cable extending out of the first upper vertical sleeve is pulled until the temperature measurement cable is completely pulled out for replacement or maintenance, and the working efficiency can be greatly improved.
To sum up, the utility model discloses simple structure, reasonable in design can increase substantially work efficiency, and the temperature measurement cable of convenient change or maintenance damage, and the practicality is strong, convenient to popularize and use.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of reference numerals:
7-1-a first vertical PE sleeve; 7-2-a second vertical PE sleeve;
8-1 — a first horizontal PE sleeve; 8-2 — a second horizontal PE sleeve;
9-1 — a first upper vertical bushing; 9-2-a second upper vertical bushing;
10-1-a first PE external thread connector; 10-1-2-a first PE internal thread joint;
10-2-1-a second PE external thread connector; 10-2-a second PE internal thread joint;
11-PE single U head; 12-temperature measuring cable; 13-rope clip;
14-1 — a first cover plate; 14-2 — a second cover plate; 15-a first lower elbow;
16-a second lower elbow; 17-a first upper bend; 18-a second upper elbow;
19-a lead; 22 — a first inspection opening; 23-second inspection opening.
Detailed Description
As shown in fig. 1, the utility model comprises a lower vertical sleeve mechanism, a horizontal sleeve mechanism and an upper vertical sleeve mechanism which are embedded underground, and a temperature measuring cable 12 which is arranged in the lower vertical sleeve mechanism, the horizontal sleeve mechanism and the upper vertical sleeve mechanism in a penetrating way;
the lower vertical sleeve mechanism comprises a PE single U head 11, a first vertical PE sleeve 7-1 connected with one end of the PE single U head 11 and a second vertical PE sleeve 7-2 connected with the other end of the PE single U head 11, wherein the number of the first vertical PE sleeves 7-1 is multiple, and the number of the second vertical PE sleeves 7-2 is multiple;
the horizontal sleeve mechanism comprises a plurality of first horizontal PE sleeves 8-1 and a plurality of second horizontal PE sleeves 8-2 which are connected in sequence;
the upper vertical sleeve mechanism comprises a first upper vertical sleeve 9-1 and a second upper vertical sleeve 9-2, the first upper vertical sleeve 9-1 penetrates through a first inspection opening 22 on the ground, the second upper vertical sleeve 9-2 penetrates through a second inspection opening 23 on the ground, the first vertical PE sleeve 7-1, the first horizontal PE sleeve 8-1 and the first upper vertical sleeve 9-1 are sequentially communicated, the second vertical PE sleeve 7-2, the second horizontal PE sleeve 8-2 and the second upper vertical sleeve 9-2 are sequentially communicated, a lead 19 is arranged in the second vertical PE sleeve 7-2, the second horizontal PE sleeve 8-2 and the second upper vertical sleeve 9-2, the temperature measuring cable 12 is positioned in the first vertical PE sleeve 7-1, the first horizontal PE sleeve 8-1 and the first upper vertical sleeve 9-1, and one end of the lead wire 19 is bound with the temperature measuring probe at the bottom end of the temperature measuring cable 12 through the rope clamp 13, the other end of the lead wire 19 extends out of the second upper vertical sleeve 9-2, and the top end of the temperature measuring cable 12 extends out of the second upper vertical sleeve 9-2.
In this embodiment, two adjacent first vertical PE sleeves 7-1 are connected by a first vertical PE loose joint, which includes a first PE outer wire joint 10-1-1 disposed on one first vertical PE sleeve 7-1 and a first PE inner wire joint 10-1-2 disposed on the other first vertical PE sleeve 7-1;
two adjacent second vertical PE sleeves 7-2 are connected through a second vertical PE movable joint, and the second vertical PE movable joint comprises a second PE outer wire joint 10-2-1 arranged on one second vertical PE sleeve 7-2 and a second PE inner wire joint 10-2-2 arranged on the other second vertical PE sleeve 7-2.
In this embodiment, two adjacent first horizontal PE sleeves 8-1 are connected by a first horizontal PE loose joint, which includes a first PE external thread joint disposed on one first horizontal PE sleeve 8-1 and a first PE internal thread joint disposed on the other first horizontal PE sleeve 8-1;
two adjacent second horizontal PE sleeves 8-2 are connected through a second horizontal PE movable joint, and the second horizontal PE movable joint comprises a second PE outer wire joint arranged on one second horizontal PE sleeve 8-2 and a second PE inner wire joint arranged on the other second horizontal PE sleeve 8-2.
In this embodiment, the uppermost first vertical PE bushing 7-1 is connected to the first horizontal PE bushing 8-1 through the first lower bend 15, the uppermost second vertical PE bushing 7-2 is connected to the second horizontal PE bushing 8-2 through the second lower bend 16, the first horizontal PE bushing 8-1 is connected to the first upper vertical bushing 9-1 through the first upper bend 17, and the second horizontal PE bushing 8-2 is connected to the second upper vertical bushing 9-2 through the second upper bend 18.
In the embodiment, the first vertical PE casing pipe 7-1 and the second vertical PE casing pipe 7-2 are symmetrically arranged, and the horizontal distance between the first horizontal PE casing pipe 8-1 and the second horizontal PE casing pipe 8-2 is 0-30 mm;
the top end of the first upper vertical sleeve 9-1 is 10-20 cm higher than the top end of the first inspection opening 22, and the top end of the second upper vertical sleeve 9-2 is 10-20 cm higher than the top end of the second inspection opening 23.
In this embodiment, a first cover plate 14-1 is disposed on the top of the first upper vertical sleeve 9-1, a second cover plate 14-2 is disposed on the top of the second upper vertical sleeve 9-2, a first wire passing hole is disposed on the first cover plate 14-1, and a second wire passing hole is disposed on the second cover plate 14-2.
In the embodiment, the lower vertical sleeve mechanism, the horizontal sleeve mechanism and the upper vertical sleeve mechanism are arranged to improve the arrangement range of the temperature measuring cables, so that the application range of the ground temperature monitoring system of the soil source ground source heat pump is improved.
In this embodiment, the lower vertical sleeving mechanism is provided to include a single PE U head 11, a first vertical PE sleeving 7-1 and a second vertical PE sleeving 7-2, the horizontal sleeving mechanism includes a first horizontal PE sleeving 8-1 and a second horizontal PE sleeving 8-2, the upper vertical sleeving mechanism includes a first upper vertical sleeving 9-1 and a second upper vertical sleeving 9-2, the temperature measuring cable 12 is arranged to penetrate through the first vertical PE sleeving 7-1, the first horizontal PE sleeving 8-1 and the first upper vertical sleeving 9-1 which are sequentially communicated, and the lead 19 is arranged to penetrate through the second vertical PE sleeving 7-2, the second horizontal PE sleeving 8-2 and the second upper vertical sleeving 9-2 which are sequentially communicated.
In this embodiment, the lead wire 19 is arranged to pull the other end of the lead wire 19 extending out of the second upper vertical sleeve 9-2, so that the temperature probe at the bottom end of the temperature measuring cable 12 moves along the first upper vertical sleeve 9-1, the first horizontal PE sleeve 8-1 and the first vertical PE sleeve 7-1 until the temperature probe at the bottom end of the temperature measuring cable 12 is flush with the bottom end of the first vertical PE sleeve 7-1 at the lowest end, thereby realizing the layout of the temperature measuring cable 12; on the contrary, when the temperature measuring cable 12 needs to be replaced or maintained, the end part of the temperature measuring cable 12 extending out of the first upper vertical sleeve 9-1 is pulled until the temperature measuring cable 12 is completely pulled out for replacement or maintenance, so that the working efficiency can be greatly improved.
In this embodiment, the threading wire 10 is a stainless steel cable or other cable with high corrosion resistance, wear resistance and strength.
In the embodiment, during actual use, the first cover plate 14-1 and the second cover plate 14-2 are arranged to seal the pipe orifice of the sleeve pipe, so that impurities are prevented from entering the sleeve pipe and blocking the sleeve pipe.
In this embodiment, in actual use, the length of the end of the lead wire 19 extending out of the first upper vertical sleeve 9-1 is 1m to 2m, and the length of the other end of the lead wire 19 extending out of the second upper vertical sleeve 9-2 is 1m to 2 m.
To sum up, the utility model discloses simple structure, reasonable in design can increase substantially work efficiency, and the temperature measurement cable of convenient change or maintenance damage, and the practicality is strong, convenient to popularize and use.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (6)
1. The utility model provides a structure of temperature measurement cable among ground source heat pump ground temperature monitoring system which characterized in that: the temperature measurement device comprises a lower vertical sleeve mechanism, a horizontal sleeve mechanism and an upper vertical sleeve mechanism which are buried underground, and temperature measurement cables (12) which are arranged in the lower vertical sleeve mechanism, the horizontal sleeve mechanism and the upper vertical sleeve mechanism in a penetrating manner;
the lower vertical sleeve mechanism comprises a PE single U head (11), a first vertical PE sleeve (7-1) connected with one end of the PE single U head (11) and a second vertical PE sleeve (7-2) connected with the other end of the PE single U head (11), the number of the first vertical PE sleeves (7-1) is multiple, and the number of the second vertical PE sleeves (7-2) is multiple;
the horizontal sleeve mechanism comprises a plurality of first horizontal PE sleeves (8-1) and a plurality of second horizontal PE sleeves (8-2) which are connected in sequence;
the upper vertical sleeve mechanism comprises a first upper vertical sleeve (9-1) and a second upper vertical sleeve (9-2), the first upper vertical sleeve (9-1) penetrates out of a first inspection opening (22) on the ground, the second upper vertical sleeve (9-2) penetrates out of a second inspection opening (23) on the ground, the first vertical PE sleeve (7-1), the first horizontal PE sleeve (8-1) and the first upper vertical sleeve (9-1) are sequentially communicated, the second vertical PE sleeve (7-2), the second horizontal PE sleeve (8-2) and the second upper vertical sleeve (9-2) are sequentially communicated, a lead (19) is arranged in the second vertical PE sleeve (7-2), the second horizontal PE sleeve (8-2) and the second upper vertical sleeve (9-2), the temperature measuring cable (12) is positioned in the first vertical PE sleeve (7-1), the first horizontal PE sleeve (8-1) and the first upper vertical sleeve (9-1), one end of the lead (19) is bound with the temperature measuring probe at the bottom end of the temperature measuring cable (12) through the rope clamp (13), the other end of the lead (19) extends out of the second upper vertical sleeve (9-2), and the top end of the temperature measuring cable (12) extends out of the second upper vertical sleeve (9-2).
2. The structure of the temperature measuring cable in the ground temperature monitoring system of the soil source ground source heat pump according to claim 1, characterized in that: two adjacent first vertical PE sleeves (7-1) are connected through a first vertical PE movable joint, and the first vertical PE movable joint comprises a first PE outer wire joint (10-1-1) arranged on one first vertical PE sleeve (7-1) and a first PE inner wire joint (10-1-2) arranged on the other first vertical PE sleeve (7-1);
two adjacent second vertical PE sleeves (7-2) are connected through a second vertical PE movable joint, and the second vertical PE movable joint comprises a second PE outer wire joint (10-2-1) arranged on one second vertical PE sleeve (7-2) and a second PE inner wire joint (10-2-2) arranged on the other second vertical PE sleeve (7-2).
3. The structure of the temperature measuring cable in the ground temperature monitoring system of the soil source ground source heat pump according to claim 1, characterized in that: two adjacent first horizontal PE sleeves (8-1) are connected through a first horizontal PE movable joint, and the first horizontal PE movable joint comprises a first PE outer wire joint arranged on one first horizontal PE sleeve (8-1) and a first PE inner wire joint arranged on the other first horizontal PE sleeve (8-1);
two adjacent second horizontal PE sleeves (8-2) are connected through a second horizontal PE movable joint, and the second horizontal PE movable joint comprises a second PE outer wire joint arranged on one second horizontal PE sleeve (8-2) and a second PE inner wire joint arranged on the other second horizontal PE sleeve (8-2).
4. The structure of the temperature measuring cable in the ground temperature monitoring system of the soil source ground source heat pump according to claim 1, characterized in that: the first vertical PE casing pipe (7-1) at the uppermost end is connected with the first horizontal PE casing pipe (8-1) through a first lower elbow (15), the second vertical PE casing pipe (7-2) at the uppermost end is connected with the second horizontal PE casing pipe (8-2) through a second lower elbow (16), the first horizontal PE casing pipe (8-1) is connected with the first upper vertical casing pipe (9-1) through a first upper elbow (17), and the second horizontal PE casing pipe (8-2) is connected with the second upper vertical casing pipe (9-2) through a second upper elbow (18).
5. The structure of the temperature measuring cable in the ground temperature monitoring system of the soil source ground source heat pump according to claim 1, characterized in that: the first vertical PE casing pipe (7-1) and the second vertical PE casing pipe (7-2) are symmetrically arranged, and the horizontal distance between the first horizontal PE casing pipe (8-1) and the second horizontal PE casing pipe (8-2) is 0-30 mm;
the top end of the first upper vertical sleeve (9-1) is 10-20 cm higher than the top end of the first inspection opening (22), and the top end of the second upper vertical sleeve (9-2) is 10-20 cm higher than the top end of the second inspection opening (23).
6. The structure of the temperature measuring cable in the ground temperature monitoring system of the soil source ground source heat pump according to claim 1, characterized in that: the top of the first upper vertical sleeve (9-1) is provided with a first cover plate (14-1), the top of the second upper vertical sleeve (9-2) is provided with a second cover plate (14-2), the first cover plate (14-1) is provided with a first wire passing hole, and the second cover plate (14-2) is provided with a second wire passing hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120546498.7U CN214334075U (en) | 2021-03-16 | 2021-03-16 | Structure of temperature measuring cable in ground temperature monitoring system of soil source ground source heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120546498.7U CN214334075U (en) | 2021-03-16 | 2021-03-16 | Structure of temperature measuring cable in ground temperature monitoring system of soil source ground source heat pump |
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| CN214334075U true CN214334075U (en) | 2021-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120546498.7U Active CN214334075U (en) | 2021-03-16 | 2021-03-16 | Structure of temperature measuring cable in ground temperature monitoring system of soil source ground source heat pump |
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| CN (1) | CN214334075U (en) |
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2021
- 2021-03-16 CN CN202120546498.7U patent/CN214334075U/en active Active
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