Direct burial heat supply pipe with anti-leakage monitoring device

Abstract

The utility model discloses a direct burial heat supply pipe with a leakproof monitoring device in the technical field of leakproof monitoring, which comprises a heat supply inner pipe and a support outer pipe, the support outer pipe is sleeved outside the heat supply inner pipe, the heat supply inner pipe is formed by welding and splicing a plurality of groups of heat insulation pipe bodies end to end, and the heat insulation pipe bodies are sleeved outside the support outer pipe. The welding joint of the two sets of heat preservation pipe bodies is sleeved with a heat preservation sealing ring, the supporting outer pipe comprises a metal pipe body, the metal pipe body is internally sleeved with a leakage monitoring pipe fitting, the leakage monitoring pipe fitting comprises a heat conduction pipe body for heat preservation pipe body leakage prevention monitoring and a leakage detection assembly, and the leakage detection assembly is installed in the middle of one side of the heat conduction pipe body. A first flange is arranged at one end of the heat conduction pipe body, a second flange is further connected to the end, away from the first flange, of the heat conduction pipe body, and the anti-leakage monitoring device designed in the scheme provides real-time leakage monitoring and early warning, so that risks and consequences possibly caused by leakage processing delay are greatly reduced; therefore, the management personnel can accurately position the leakage source in the shortest time.

Description

Technical Field

[0001] The utility model relates to the technical field of leakage prevention monitoring, in particular to a directly buried heating pipe with a leakage prevention monitoring device. Background Art

[0002] The heating pipe system is a set of facilities specially designed to deliver heat energy to buildings or facilities. They are usually connected to a centralized heat source, such as a boiler, geothermal system or thermal power plant, and are responsible for transferring heat to the destination that needs to be heated. These pipes can not only provide heating, but also supply hot water or steam to ensure that the indoor temperature is suitable and create a comfortable living or working environment for people. Whether in cities or rural areas, heating pipes are an important part of the infrastructure of modern society, and they play an irreplaceable role in maintaining people's quality of life.

[0003] In order to improve the transmission efficiency and reasonable distribution of heat energy, heating pipes are usually designed to be concealed underground or inside buildings. Such a layout helps to hide the pipes and reduce the occupation of ground space. However, this installation method also brings some challenges, especially when the pipes need maintenance or leaks, the concealment of underground pipes makes monitoring and early warning difficult. Once a leak occurs, it may not be detected and handled in time, which will not only delay maintenance work, but also threaten the safe operation of the entire heating system.

[0004] Based on this, we propose a direct buried heating pipe with an anti-leakage monitoring device to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] Therefore, the purpose of the utility model is to provide a directly buried heating pipe with an anti-leakage monitoring device, which can solve the monitoring and early warning difficulties caused by concealed installation of heating pipes underground or inside buildings, as well as the problems of difficulty in timely detection and handling of leaks.

[0007] In order to solve the above technical problems, the utility model provides a direct buried heating pipe with an anti-leakage monitoring device, which adopts the following technical scheme: comprising a heating inner pipe and a supporting outer pipe, the supporting outer pipe is sleeved and installed on the outside of the heating inner pipe, the heating inner pipe is composed of multiple groups of insulation pipe bodies welded end to end, and the welding connection of two groups of insulation pipe bodies is sleeved with insulation sealing rings on the outside;

[0008] The supporting outer tube comprises a metal tube body, and a leakage monitoring pipe fitting is sleeved inside the metal tube body;

[0009] The leakage monitoring pipe fitting includes a heat-conducting pipe body for leak-proof monitoring of the insulation pipe body and a leakage detection component, wherein the leakage detection component is installed in the middle of one side of the heat-conducting pipe body, a first flange is provided at one end of the heat-conducting pipe body, and a second flange is also connected to the end of the heat-conducting pipe body away from the first flange.

[0010] By adopting the above technical scheme, the direct buried heating pipe with anti-leakage monitoring device designed in this scheme is based on a multi-level anti-leakage system. It is composed of an inner heating inner pipe and an outer supporting outer pipe. As the main channel for transferring heat, the heating inner pipe is welded end to end by multiple insulation pipe bodies, and an insulation sealing ring is used at the welding interface to further prevent heat loss. At the same time, the leakage monitoring pipe fittings sleeved in the metal pipe body are the key to the device. It is composed of a heat-conducting pipe body and a leakage detection component. It can not only detect and transmit temperature changes, but also monitor leakage through a leakage detection device equipped with a leakage detection head. The intelligence of the monitoring device lies in that when the water absorption layer of the heat-conducting pipe body contacts the leaked hot water, it can quickly sense the temperature change and determine whether there is a leakage by electrically connecting to the leakage detection head of the leakage detection device. Once a leakage is detected, the early warning transmitter will sound an alarm, so that the maintenance personnel can respond in time. In addition, through the internally set fixing screw hole, the first flange and the second flange threaded match, it is ensured that the entire monitoring device can be fixedly and stably installed in the pipeline system;

[0011] The direct buried heating pipe with anti-leakage monitoring device designed in this scheme is crucial to ensuring the safe and efficient operation of the heating system. First of all, the system provides real-time leakage monitoring and early warning, which greatly reduces the risks and consequences that may be caused by delayed treatment of leaks. Not only that, the high efficiency of the early warning system can also optimize the maintenance progress of the entire heating pipeline, allowing managers to accurately locate the source of the leak in the shortest time and take remedial measures quickly. In addition to leakage monitoring and early warning, the device also enhances the overall structural strength of the heating system, reduces the loss of heat during transmission, and improves thermal efficiency. Due to the presence of the monitoring device, the heating system can operate more stably, reduce the number of failures, and thus extend the service life of the pipeline system.

[0012] Optionally, the leakage detection component includes a water leakage detection device, a warning transmitter is installed on the top of the water leakage detection device, and a water leakage detection head is connected to the bottom of the water leakage detection device. The water leakage detection device is electrically connected to the warning transmitter and the water leakage detection head. The water leakage detection head and the end of the water leakage detection device close to the water leakage detection head are also provided with a fixed connection cover.

[0013] By adopting the above technical solution, when water leakage occurs at the welding connection of the two groups of insulation pipe bodies, the water leakage detection head will detect the leaking water. Since the water leakage detection head is electrically connected to the water leakage detection device and the early warning transmitter, the water leakage detection head will transmit the detected information to the water leakage detection device. The water leakage detection device will send a warning communication signal through the early warning transmitter on the top, so that relevant personnel can respond quickly and take corresponding maintenance or repair measures immediately.

[0014] Optionally, a water-absorbing layer is laid inside the heat-conducting pipe body, a fixing screw hole is opened in the middle of one side of the heat-conducting pipe body, and a connecting screw head is also provided at one end of the heat-conducting pipe body away from the first flange.

[0015] By adopting the above technical solution, this solution lays a water-absorbing layer inside the heat-conducting pipe body, which can quickly absorb moisture leaked from the welding connection between the two sets of insulation pipe bodies, and then can use the material of the heat-conducting pipe body to quickly conduct temperature changes. This temperature change is the key to detecting leaks because it can be quickly detected by the leak detection component, thereby triggering an early warning mechanism.

[0016] Optionally, the water absorbing layer and the thermal insulation sealing ring and the water leakage detection head are in contact fit, and the fixing screw hole and the fixed connection cover are in thread fit.

[0017] By adopting the above technical scheme, this scheme adopts a structural design of contact and cooperation between the water-absorbing layer and the thermal insulation sealing ring and the water leakage detection head, which means that there is close physical contact between the water-absorbing layer and the thermal insulation sealing ring and the water leakage detection head. This contact and cooperation ensures that once a leak occurs at the welding connection of the two sets of thermal insulation pipe bodies, the water-absorbing layer can quickly absorb the leaked liquid. This timely absorption effect combined with the subsequent heat conduction effect can timely transmit the leakage signal to the water leakage detection head, thereby triggering the leakage warning system. In addition, the addition of the thermal insulation sealing ring not only enhances the thermal insulation effect, but also provides a stable and suitable working environment for the water-absorbing layer and the water leakage detection head, so that they can more efficiently sense and respond to leakage events.

[0018] Optionally, the second flange includes a flange body, the flange body and the inner side of the middle part of the flange body are provided with connecting screw holes, the connecting screw holes and the connecting screw heads are threadedly matched, and positioning blocks are respectively installed on the outer sides of the flange body.

[0019] By adopting the above technical solution, the present solution adopts the structural design of threaded cooperation between the connecting screw hole and the connecting screw head, and the heat-conducting pipe body can disassemble, connect, repair and replace the second flange according to the usage situation.

[0020] Optionally, third flanges are respectively installed at both ends of the metal tube body, and a connecting groove is opened through the middle of one side of the metal tube body.

[0021] By adopting the above technical solution, the present solution uses a connection notch that is opened through the middle of one side of the metal tube body to assemble the leakage detection component and the heat-conducting tube body.

[0022] Optionally, one side of the two groups of third flanges is provided with an embedding groove, and the embedding groove matches the first flange and the second flange structure. A plurality of groups of flange holes distributed in a circumferential array are also provided around the embedding groove and the first flange and the second flange.

[0023] By adopting the above technical solution, the present solution can connect and fix the two ends of the heat-conducting pipe body sleeved and connected inside the metal pipe body through the flange holes respectively opened around the embedded groove and the first flange and the second flange, and the supporting outer pipe can also disassemble, connect, repair and replace the metal pipe body and the heat-conducting pipe body according to the usage.

[0024] Optionally, one group of the embedded grooves has positioning grooves around its inner wall, and the embedded grooves are also provided with positioning card grooves around their inner wall close to the positioning groove. The positioning card grooves are connected through each other, and the positioning card grooves, positioning grooves and positioning card block structures match each other.

[0025] By adopting the above technical solution, this solution can limit the connection of the flange body in the embedded groove of one of the third flanges through the structural design between the positioning slot, the positioning groove and the positioning block, which can effectively improve the stability of the connection between the metal pipe body and the heat conduction pipe body.

[0026] In summary, the present invention has at least one of the following beneficial effects:

[0027] 1. The direct buried heating pipe with anti-leakage monitoring device designed in this scheme is based on a multi-level anti-leakage system. It consists of an inner heating inner pipe and an outer supporting outer pipe. As the main channel for transferring heat, the heating inner pipe is welded end to end by multiple insulation pipe bodies, and an insulation sealing ring is used at the welding interface to further prevent heat loss. At the same time, the leakage monitoring pipe fittings sleeved in the metal pipe body are the key to the device. It is composed of a heat-conducting pipe body and a leakage detection component. It can not only detect and transmit temperature changes, but also monitor leakage through a leakage detection device equipped with a leakage detection head. The intelligence of the monitoring device lies in that when the water absorption layer of the heat-conducting pipe body contacts the leaked hot water, it can quickly sense the temperature change and determine whether there is a leakage through the leakage detection head electrically connected to the leakage detection device. Once a leakage is detected, the early warning transmitter will sound an alarm, so that the maintenance personnel can respond in time. In addition, through the internally set fixing screw holes, the first flange and the second flange threaded cooperation, it is ensured that the entire monitoring device can be fixedly and stably installed in the pipeline system;

[0028] 2. The direct buried heating pipe with anti-leakage monitoring device designed in this scheme is crucial to ensuring the safe operation and efficiency of the heating system. First of all, the system provides real-time leakage monitoring and early warning, which greatly reduces the risks and consequences that may be caused by delayed treatment of leaks. Not only that, the high efficiency of the early warning system can also optimize the maintenance progress of the entire heating pipeline, allowing managers to accurately locate the source of the leak in the shortest time and take remedial measures quickly. In addition to leakage monitoring and early warning, the device also enhances the overall structural strength of the heating system, reduces the loss of heat during transmission, and improves thermal efficiency. Due to the presence of the monitoring device, the heating system can operate more stably, reduce the number of failures, and thus extend the service life of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0031] Figure 2 This is a schematic diagram of the heating inner pipe structure of the utility model;

[0032] Figure 3 This is a schematic diagram of the supporting outer tube structure of the utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the leakage monitoring pipe fitting of the utility model;

[0034] Figure 5 This is a schematic diagram of the structure of the leakage detection component of the utility model;

[0035] Figure 6 This is a schematic diagram of the heat conduction pipe structure of the utility model;

[0036] Figure 7 This is a schematic diagram of the second flange structure of the utility model;

[0037] Figure 8 This is a schematic diagram of the metal tube structure of the utility model;

[0038] Fig. 9 This is a schematic diagram of the positioning groove structure of the utility model.

[0039] Description of reference numerals: 100, inner heating pipe; 101, heat-insulating pipe body; 102, heat-insulating sealing ring; 200, supporting outer pipe; 201, metal pipe body; 201a, third flange; 201a-1, embedding groove; 201a-1a, positioning groove; 201a-1b, positioning card slot; 201a-2, flange hole; 201b, connecting notch; 202, leakage monitoring pipe fitting; 202a, heat-conducting pipe body; 202a-1 , water absorbing layer; 202a-2, fixing screw hole; 202a-3, connecting screw head; 202b, leakage detection component; 202b-1, water leakage detection device; 202b-2, early warning transmitter; 202b-3, water leakage detection head; 202b-4, fixed connecting cover; 202c, first flange; 202d, second flange; 202d-1, flange body; 202d-2, connecting screw hole; 202d-3, positioning block. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-9 The utility model is described in further detail.

[0041] Embodiment 1, refer to Figure 1-5 The utility model discloses a direct buried heating pipe with an anti-leakage monitoring device.

[0042] It includes a heating inner tube 100 and a supporting outer tube 200. The supporting outer tube 200 is sleeved and installed on the outside of the heating inner tube 100. The heating inner tube 100 is composed of multiple groups of heat-insulating tube bodies 101 welded end to end. The welding connection of the two groups of heat-insulating tube bodies 101 is sleeved with a heat-insulating sealing ring 102.

[0043] The supporting outer tube 200 comprises a metal tube body 201, and a leakage monitoring pipe fitting 202 is sleeved inside the metal tube body 201;

[0044] The leakage monitoring pipe fitting 202 includes a heat-conducting pipe body 202a for anti-leakage monitoring of the insulation pipe body 101 and a leakage detection component 202b. The leakage detection component 202b is installed in the middle of one side of the heat-conducting pipe body 202a. A first flange 202c is provided at one end of the heat-conducting pipe body 202a, and a second flange 202d is also connected to the end of the heat-conducting pipe body 202a away from the first flange 202c.

[0045] The leakage detection assembly 202b includes a water leakage detection device 202b-1, a warning transmitter 202b-2 is installed on the top of the water leakage detection device 202b-1, and a water leakage detection head 202b-3 is connected to the bottom of the water leakage detection device 202b-1. The water leakage detection device 202b-1 and the warning transmitter 202b-2 and the water leakage detection head 202b-3 are all electrically connected. The water leakage detection head 202b-3 and the end of the water leakage detection device 202b-1 close to the water leakage detection head 202b-3 are also provided with a fixed connection cover 202b-4. When the two When water leaks at the welding connection of the group insulation pipe body 101, the water leakage detection head 202b-3 will detect the leaking water. Since the water leakage detection head 202b-3 is electrically connected to the water leakage detection device 202b-1 and the early warning transmitter 202b-2, the water leakage detection head 202b-3 will transmit the detected information to the water leakage detection device 202b-1. The water leakage detection device 202b-1 sends a warning communication signal through the early warning transmitter 202b-2 at the top, so that relevant personnel can respond quickly and take corresponding maintenance or repair measures immediately.

[0046] Example 2, refer to Figure 5-7 In this embodiment, in order to solve the problem of difficulty in monitoring and early warning caused by concealed installation of heating pipes underground or inside buildings, and difficulty in timely detection and treatment of leakage, based on the same concept as the above-mentioned embodiment 1, the direct buried heating pipe with anti-leakage monitoring device also includes:

[0047] A water-absorbing layer 202a-1 is laid inside the heat-conducting pipe body 202a, a fixing screw hole 202a-2 is opened in the middle of one side of the heat-conducting pipe body 202a, and a connecting screw head 202a-3 is also provided at the end of the heat-conducting pipe body 202a away from the first flange 202c. The water-absorbing layer 202a-1 laid inside the heat-conducting pipe body 202a can quickly absorb the moisture leaked from the welding connection between the two groups of insulation pipe bodies 101, and then the material of the heat-conducting pipe body 202a can be used to quickly conduct temperature changes. This temperature change is the key to detecting leakage because it can be quickly detected by the leakage detection component 202b, thereby activating the early warning mechanism.

[0048] The water absorbing layer 202a-1 is in contact with the heat preservation sealing ring 102 and the water leakage detection head 202b-3, and the fixing screw hole 202a-2 is in threaded contact with the fixing connection cover 202b-4. The structural design of the contact and cooperation between the water absorbing layer 202a-1, the heat preservation sealing ring 102 and the water leakage detection head 202b-3 means that there is close physical contact between the water absorbing layer 202a-1, the heat preservation sealing ring 102 and the water leakage detection head 202b-3. This contact and cooperation ensures that the two sets of heat preservation pipe bodies are Once water leakage occurs at the welding connection of 101, the water-absorbing layer 202a-1 can quickly absorb the leaked liquid. This timely absorption effect combined with the subsequent heat conduction effect can timely transmit the leakage signal to the water leakage detection head 202b-3, thereby triggering the leakage warning system. In addition, the addition of the thermal insulation sealing ring 102 not only enhances the thermal insulation effect, but also provides a stable and suitable working environment for the water-absorbing layer 202a-1 and the water leakage detection head 202b-3, so that they can more efficiently sense and respond to leakage events.

[0049] The second flange 202d includes a flange body 202d-1, and a connecting screw hole 202d-2 is opened on the inner side of the flange body 202d-1 and the middle part of the flange body 202d-1. The connecting screw hole 202d-2 and the connecting screw head 202a-3 are threadedly matched. Positioning blocks 202d-3 are also installed on the outer sides of the flange body 202d-1. Through the structural design of threaded matching between the connecting screw hole 202d-2 and the connecting screw head 202a-3, the heat-conducting pipe body 202a can disassemble, connect, repair and replace the second flange 202d according to the usage.

[0050] Example 3, refer to Figure 7-9 In this embodiment, in order to solve the problem of difficulty in monitoring and early warning caused by concealed installation of heating pipes underground or inside buildings, and difficulty in timely detection and treatment of leakage, based on the same concept as the above-mentioned embodiment 1, the direct buried heating pipe with anti-leakage monitoring device also includes:

[0051] A third flange 201a is installed at both ends of the metal tube body 201, and a connecting groove 201b is opened through the middle of one side of the metal tube body 201. The connecting groove 201b opened through the middle of one side of the metal tube body 201 is used for assembly between the leakage detection component 202b and the heat-conducting tube body 202a.

[0052] One side of the two groups of third flanges 201a is provided with an embedding groove 201a-1, and the embedding groove 201a-1 matches the structure of the first flange 202c and the second flange 202d. A plurality of groups of flange holes 201a-2 distributed in a circumferential array are respectively provided around the embedding groove 201a-1 and the first flange 202c and the second flange 202d. Through the flange holes 201a-2 respectively provided around the embedding groove 201a-1 and the first flange 202c and the second flange 202d, the two ends of the heat-conducting pipe body 202a sleeved and connected inside the metal pipe body 201 can be connected and fixed, and the supporting outer tube 200 can also disassemble, connect, repair and replace the metal pipe body 201 and the heat-conducting pipe body 202a according to the usage.

[0053] One group of embedded grooves 201a-1 is provided with positioning grooves 201a-1a around the inner wall, and the embedded groove 201a-1 is further provided with positioning grooves 201a-1b around the inner wall close to the positioning groove 201a-1a. The positioning groove 201a-1b and the positioning groove 201a-1a are through-connected, and the positioning groove 201a-1b, the positioning groove 201a-1a and the positioning block 202d-3 structure match each other. Through the structural design between the positioning groove 201a-1b, the positioning groove 201a-1a and the positioning block 202d-3, the flange body 202d-1 can be limitedly connected to the embedded groove 201a-1 of one group of the third flanges 201a, which can effectively improve the stability of the connection between the metal pipe body 201 and the heat-conducting pipe body 202a.

[0054] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A directly buried heating pipe with an anti-leakage monitoring device, comprising a heating inner pipe (100) and a supporting outer pipe (200), wherein the supporting outer pipe (200) is sleeved and installed outside the heating inner pipe (100), characterized in that: The heating inner pipe (100) is composed of a plurality of groups of heat-insulating pipe bodies (101) welded end to end, and a heat-insulating sealing ring (102) is provided outside the welded joints of two groups of heat-insulating pipe bodies (101); The supporting outer tube (200) comprises a metal tube body (201), and a leakage monitoring pipe fitting (202) is sleeved inside the metal tube body (201); The leakage monitoring pipe fitting (202) comprises a heat-conducting pipe body (202a) for leak-proof monitoring of the heat-insulating pipe body (101) and a leakage detection component (202b); the leakage detection component (202b) is installed in the middle of one side of the heat-conducting pipe body (202a); one end of the heat-conducting pipe body (202a) is provided with a first flange (202c); and one end of the heat-conducting pipe body (202a) away from the first flange (202c) is also connected to a second flange (202d).

2. The direct buried heating pipe with anti-leakage monitoring device according to claim 1 is characterized in that: The leakage detection assembly (202b) comprises a water leakage detection device (202b-1); a warning transmitter (202b-2) is installed on the top of the water leakage detection device (202b-1); a water leakage detection head (202b-3) is connected to the bottom of the water leakage detection device (202b-1); the water leakage detection device (202b-1) is electrically connected to the warning transmitter (202b-2) and the water leakage detection head (202b-3); and the water leakage detection head (202b-3) and one end of the water leakage detection device (202b-1) close to the water leakage detection head (202b-3) are also provided with a fixed connection cover (202b-4).

3. The direct buried heating pipe with anti-leakage monitoring device according to claim 2 is characterized in that: A water absorbing layer (202a-1) is laid inside the heat-conducting pipe body (202a), a fixing screw hole (202a-2) is provided in the middle of one side of the heat-conducting pipe body (202a), and a connecting screw head (202a-3) is also provided at one end of the heat-conducting pipe body (202a) away from the first flange (202c).

4. The direct buried heating pipe with anti-leakage monitoring device according to claim 3 is characterized in that: The water absorbing layer (202a-1) and the heat-insulating sealing ring (102) and the water leakage detection head (202b-3) are all in contact fit, and the fixing screw hole (202a-2) and the fixing connection cover (202b-4) are in thread fit.

5. The direct buried heating pipe with anti-leakage monitoring device according to claim 4 is characterized in that: The second flange (202d) comprises a flange body (202d-1), the flange body (202d-1) and a connecting screw hole (202d-2) are provided on the inner side of the middle part of the flange body (202d-1), the connecting screw hole (202d-2) and the connecting screw head (202a-3) are threadedly matched, and positioning blocks (202d-3) are respectively installed on the outer sides of the flange body (202d-1).

6. The direct buried heating pipe with anti-leakage monitoring device according to claim 1, characterized in that: A third flange (201a) is respectively installed at both ends of the metal tube body (201), and a connecting notch (201b) is provided through the middle of one side of the metal tube body (201).

7. The direct buried heating pipe with anti-leakage monitoring device according to claim 6 is characterized in that: One side of the two groups of third flanges (201a) is provided with an embedding groove (201a-1), the embedding groove (201a-1) matches the structure of the first flange (202c) and the second flange (202d), and a plurality of groups of flange holes (201a-2) distributed in a circumferential array are respectively provided around the embedding groove (201a-1) and the first flange (202c) and the second flange (202d).

8. The direct buried heating pipe with anti-leakage monitoring device according to claim 7, characterized in that: One group of the embedded grooves (201a-1) has positioning grooves (201a-1a) formed around its inner wall, and the embedded grooves (201a-1) have positioning card grooves (201a-1b) formed around its inner wall close to the positioning groove (201a-1a), the positioning card grooves (201a-1b) and the positioning grooves (201a-1a) are connected through each other, and the positioning card grooves (201a-1b), the positioning grooves (201a-1a) and the positioning card blocks (202d-3) are structurally matched.

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