Automatic temperature control energy-saving cable

Abstract

The invention relates to the technical field of cables, in particular to an automatic temperature control energy-saving cable. The cable at least comprises a cable main body and a conduction ventilation source, the cable main body is sequentially provided with a plurality of inner cores, an insulating heat-conducting moisture-proof sheath and an outer sheath from inside to outside, a plurality of stagnation guide cavities are arranged between the insulating heat-conducting moisture-proof sheath and the outer sheath, and buffer separation assemblies are arranged in the stagnation guide cavities. A V-shaped structure is formed through the buffer separation assembly to be movably connected with the inner wall of the outer sheath in a buffer mode, and an annular channel is formed between the buffer separation assembly and the stagnation guide cavity. According to the invention, ventilation type heat dissipation can be performed on the required position of the cable in a targeted manner, the service life is prolonged, the annular channel prolongs the time that the heat dissipation heat of the inner core is exported by air flow, the heat dissipation effect is improved, and the V-shaped buffer separation assembly surrounds the outer walls of the inner core and the insulating heat-conducting moisture-proof sheath, so that the strength of the outer wall of the cable main body is improved, and the service life of the cable is prolonged. The service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of cables, in particular to a self-temperature-controlling energy-saving cable. Background Art

[0002] Cables are wires made of one or more mutually insulated conductors and an outer insulating protective layer. They can be seen everywhere in the production and life fields of today's society. However, with the development of science and technology, more and more high-power devices are constantly being born and put into use. These devices need to conduct high-voltage electrical energy when in use, and a large amount of heat will be generated during the process of conducting electrical energy and equipment operation. However, the existing technology has the following defects when controlling the temperature and dissipating the heat for cables:

[0003] First, when the cable is used on high-power equipment, due to the long size of the cable, the connection between the cable and the equipment and the power supply will generate heat due to the influence of the heat in the power supply and the equipment, and the ambient temperature and ventilation conditions around the cable will also affect the heat dissipation efficiency. Therefore, the location where the heat is generated on the cable is variable. When the current cable dissipates heat, not only is the heat dissipation efficiency limited, but the heat dissipation location cannot be adjusted, which makes it inconvenient to control the temperature and dissipate heat at the location that really needs heat dissipation;

[0004] Secondly, as high-power equipment is moved and adjusted, the surface of the cable is easily squeezed, causing the cable to be damaged by impact. In addition, the cable is exposed to the outside and is easily stepped on, causing the inner core of the cable to deform and affect the transmission of power. In view of this, we propose a self-controlling temperature and energy-saving cable. Summary of the invention

[0005] The object of the present invention is to provide a self-temperature-controlling energy-saving cable to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides a self-temperature-controlling energy-saving cable, comprising at least:

[0007] A cable body, wherein the cable body is provided with a plurality of inner cores, an insulating heat-conducting moisture-proof sheath and an outer sheath in sequence from the inside to the outside, a plurality of stagnation guide cavities are provided between the insulating heat-conducting moisture-proof sheath and the outer sheath, a buffer partition component is provided inside the stagnation guide cavity, a "V"-shaped structure is formed by the buffer partition component to be movably buffered and connected to the inner wall of the outer sheath, and an annular channel is formed between the buffer partition component and the stagnation guide cavity;

[0008] Two conduction ventilation sources are used for blowing and sucking airflow respectively. The conduction ventilation sources are connected and inserted inside the outer sheath and guide the airflow along the annular channel.

[0009] As a further improvement of the technical solution, the stagnation guide cavity includes a flow cavity and a stagnation cavity formed between the insulating heat-conducting moisture-proof sheath, an air inlet hole is provided between the upper flow cavity and the lower stagnation cavity, and an air outlet hole is provided between the lower flow cavity and the upper stagnation cavity;

[0010] The conduction ventilation source is in communication with the flow cavity.

[0011] As a further improvement of the technical solution, the buffer partition assembly at least includes a plurality of partitions located inside the stagnant chamber, two adjacent partitions are distributed in a "V"-shaped ring between the insulating heat-conducting moisture-proof jacket and the outer jacket, and a plurality of holes are opened on the surface of the partition;

[0012] The holes enable the airflow entering from the air inlet to flow in an annular manner along the inner cavity of the stagnant cavity and be guided to the air outlet.

[0013] As a further improvement of the technical solution, a cavity is formed between two adjacent partitions, the air inlet and the air outlet are respectively aligned with one cavity, and the two aligned cavities are separated into closed cavities by a partition without holes.

[0014] As a further improvement of the present technical solution, a movable fork is provided on the inner wall of the stagnation chamber, a rotating block is provided at the end of the partition, the end of the rotating block is rotatably arranged inside the movable fork, the partition seal is movable in the stagnation chamber, and the end of the partition away from the movable fork is fixedly connected to the outer sheath.

[0015] As a further improvement of the technical solution, a groove is provided at the connection between the movable fork and the rotating block, and a coil spring is fixedly connected between the rotating block and the end of the inner cavity of the groove.

[0016] As a further improvement of the present technical solution, the outer wall of the outer sleeve is provided with a plurality of mounting grooves, and the plurality of mounting grooves respectively correspond to the plurality of circulation cavities, and the conduction ventilation source comprises at least a sealing plug plate inserted inside the mounting groove, and the sealing plug plate is located on the outer wall of the inner cavity of the circulation cavity and is connected to a plurality of air nozzles, and the sealing plug plate is connected to a fitting limit body away from the outer wall of the circulation cavity, and a ventilation fan for accelerating the air flow is provided inside the fitting limit body.

[0017] As a further improvement of the technical solution, the inner wall of the fitting limiter is sealingly adapted to the outer wall of the outer sheath, and binding belts are provided at both ends of the fitting limiter, and the fitting limiter is tightly fitted to the outer wall of the outer sheath through the two binding belts.

[0018] As a further improvement of the present technical solution, a slide groove connected to the mounting groove is provided on the inner wall of the outer sheath, a seal is slidably provided inside the slide groove, an elastic member is fixedly connected between the end of the seal and the slide groove, and the seal is driven to seal inside the mounting groove under the elastic force of the elastic member's reset.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In the self-controlling temperature and energy-saving cable, an annular channel is formed between the buffer separation component and the stagnant guide cavity, so that two conductive ventilation sources are installed in a section of the cable with high heat. The two conductive ventilation sources blow and suck airflow respectively, and the airflow flows through the annular channel, which is conducive to targeted ventilation heat dissipation of the cable and improves the service life. At the same time, the annular channel prolongs the time for the airflow to extract the heat from the inner core and improves the heat dissipation effect.

[0021] 2. In the self-controlling temperature and energy-saving cable, the buffer separator component is movably connected between the outer sheath and the insulating heat-conducting moisture-proof sheath through a buffer separator component. When the outer wall of the cable body is squeezed or bent by external objects, the "V"-shaped buffer separator component is driven to open outward, generating a rebound force to buffer the damage to the inner core caused by the impact. In addition, the "V"-shaped buffer separator component surrounds the inner core and the outer wall of the insulating heat-conducting moisture-proof sheath, thereby increasing the strength of the outer wall of the cable body and improving its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure assembly of the present invention;

[0023] Figure 2 It is a partial schematic diagram of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of assembling the stagnation guide cavity and the buffer partition assembly of the present invention;

[0025] Figure 4 A demonstration diagram of the buffer partition assembly of the present invention;

[0026] Figure 5 A demonstration diagram of the stagnation guide cavity of the present invention;

[0027] Figure 6 It is an exploded schematic diagram of the buffer partition assembly of the present invention;

[0028] Figure 7 It is a schematic diagram of the structural assembly of the outer sheath and the conductive ventilation source of the present invention;

[0029] Figure 8 It is a partial exploded schematic diagram of the outer sheath and the conductive ventilation source of the present invention.

[0030] The meaning of each number in the figure is:

[0031] 100, cable body; 101, inner core; 102, insulating heat-conducting moisture-proof sheath; 110, stagnation guide cavity; 111, flow cavity; 112, stagnation cavity; 113, movable fork; 114, air inlet; 115, air outlet; 120, outer sheath; 121, mounting groove; 122, slide groove; 123, sealing member; 124, elastic member; 130, buffer separation assembly; 131, partition; 132, hole; 133, rotating block; 134, spiral spring;

[0032] 200, conduction ventilation source; 210, sealing plug plate; 211, air nozzle; 220, fitting limiter; 221, ventilation fan; 230, binding belt. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Cables are wires made of one or more mutually insulated conductors and an outer insulating protective layer. They can be seen everywhere in the production and life fields of today's society. However, with the development of science and technology, more and more high-power devices are constantly being born and put into use. These devices need to conduct high-voltage electrical energy when in use, and a lot of heat will be generated in the process of conducting electrical energy and working of the equipment. Therefore, please refer to Figure 1-Figure 8 As shown, this embodiment provides a self-temperature-controlling energy-saving cable, comprising at least:

[0035] A cable body 100, wherein the cable body 100 is provided with a plurality of inner cores 101, an insulating heat-conducting moisture-proof sheath 102 and an outer sheath 120 in sequence from the inside to the outside, a plurality of stagnation guide cavities 110 are provided between the insulating heat-conducting moisture-proof sheath 102 and the outer sheath 120, a buffer partition component 130 is provided inside the stagnation guide cavity 110, a "V"-shaped structure is formed by the buffer partition component 130 to be movably buffer-connected to the inner wall of the outer sheath 120, and an annular channel is formed between the buffer partition component 130 and the stagnation guide cavity 110;

[0036] Two conductive ventilation sources 200 are respectively used for blowing and sucking airflows. The conductive ventilation sources 200 are connected and inserted inside the outer sheath 120 and guide the airflow along the annular channel.

[0037] like Figure 1-3As shown, the present invention takes into account that when the cable is used on a high-power device, due to the long size of the cable, the connection between the cable and the device and the power supply are affected by the heat in the power supply and the device to generate heat, and the ambient temperature and ventilation conditions around the cable will also affect the heat dissipation efficiency. Therefore, the location of heat generation on the cable is variable. When the current cable dissipates heat, not only is the heat dissipation efficiency limited, but the heat dissipation location cannot be adjusted, resulting in inconvenience in temperature control and heat dissipation at the location that really needs heat dissipation. Therefore, an annular channel is formed between the buffer partition component 130 and the stagnant guide cavity 110, so that two conductive ventilation sources 200 are installed in a section of the cable with high heat, so that the two conductive ventilation sources 200 blow and suck airflow respectively, so that the airflow flows through the annular channel, which is conducive to targeted ventilation heat dissipation of the cable and improves the service life. At the same time, the annular channel prolongs the time for the airflow to extract the heat from the inner core 101, thereby improving the heat dissipation effect;

[0038] As high-power equipment is frequently moved and adjusted, the surface of the cable is easily squeezed, causing the cable to be damaged by impact. In addition, the cable is exposed to the outside and is easily stepped on, causing the inner core of the cable to deform and affecting the transmission of electric energy. Therefore, the buffer separation component 130 is movably connected between the outer sheath 120 and the insulating heat-conductive moisture-proof sheath 102 in a buffering manner. When the outer wall of the cable body 100 is squeezed and bent by external objects, the "V"-shaped buffer separation component 130 is driven to open outward, generating a rebound force to buffer the damage to the inner core 101 caused by the impact. In addition, the "V"-shaped buffer separation component 130 surrounds the inner core 101 and the outer wall of the insulating heat-conductive moisture-proof sheath 102, thereby increasing the strength of the outer wall of the cable body 100 and improving its service life.

[0039] In addition, the modified PVDF polymer is made into an insulating heat-conducting moisture-proof sheath 102, which can significantly reduce the electric field strength inside the cable and reduce the electrocaloric effect. The modified PVDF polymer is added as a filling material to other materials of the cable to improve the thermal conductivity of the material and dissipate heat more effectively. As for the modified PVDF polymer:

[0040] The polyvinylidene fluoride multi-polymer solution is reacted with an organic base to obtain a double-bond-modified polyvinylidene fluoride-based ferroelectric polymer, thereby improving the electrocaloric effect under a low electric field;

[0041] Such modified polymers show reduced correlation between polarization domains, reduced grain size, and unchanged or increased overall concentration of polarization domains, i.e., total crystallinity, thereby showing a significant improvement in the electrocaloric effect under a low electric field. The present invention produces double bonds by chemically modifying a polyvinylidene fluoride copolymer containing chlorine elements, and has the advantages of simple process, short preparation cycle, mild reaction conditions and low cost. The prepared polymer film has good uniformity and density, and can achieve an adiabatic temperature change of more than 6K due to the electrocaloric effect under a low electric field of 50MV / m, and ensure long-life stable operation, thereby meeting the needs of the industrialization of electrocaloric refrigeration materials and related refrigeration system applications.

[0042] On the basis of the above, the specific structure needs to be disclosed in detail:

[0043] First, to achieve that the stagnation guide cavity 110 can guide the airflow blown by the conduction ventilation source 200 to another conduction ventilation source 200 to bring the heat generated by the inner core 101 out of the outer sheath 120, the structure of the stagnation guide cavity 110 is further disclosed, please refer to Figure 3 and Figure 5 As shown, the stagnation guide cavity 110 includes a flow cavity 111 and a stagnation cavity 112 formed between the insulating heat-conducting moisture-proof sheath 102, an air inlet 114 is provided between the upper flow cavity 111 and the lower stagnation cavity 112, and an air outlet 115 is provided between the lower flow cavity 111 and the upper stagnation cavity 112;

[0044] The conductive ventilation source 200 is connected to the flow cavity 111. The airflow output by one of the conductive ventilation sources 200 enters from the air inlet 114, passes through the stagnant cavity 112, and is discharged into another flow cavity 111 from the air outlet 115 until it enters another conductive ventilation source 200 and is discharged, thereby completing the airflow guiding effect, which is beneficial to ventilation and heat dissipation of the cable body 100.

[0045] Then, when the airflow enters the stagnant chamber 112 from the circulation chamber 111, the airflow can fully remove the heat from the outer wall of the inner core 101, so that the airflow flows in the stagnant chamber 112 in a circular manner. The circular channel needs to be described in detail. Figure 4 As shown, a buffer partition assembly 130 is further disclosed, so that the buffer partition assembly 130 at least includes a plurality of partitions 131 located inside the stagnant chamber 112, two adjacent partitions 131 are distributed in a "V" shape between the insulating heat-conducting moisture-proof jacket 102 and the outer jacket 120, and a plurality of holes 132 are opened on the surface of the partition 131;

[0046] The airflow entering from the air inlet 114 is guided to the air outlet 115 along the inner cavity of the stagnation cavity 112 through the hole 132 in a circular flow, which is beneficial to ensure that the airflow generated by the conductive ventilation source 200 does not directly enter the stagnation cavity 112 after entering from the air inlet 114, and the airflow flows in a circular flow along the outer side of the inner core 101 and the insulating heat-conducting moisture-proof sheath 102, which is beneficial to fully remove the heat and improve the ventilation efficiency.

[0047] Specifically, the annular channel is further defined so that a cavity is formed between two adjacent partitions 131, the air inlet 114 and the air outlet 115 are respectively aligned with one cavity, and the two aligned cavities are separated into a closed cavity by a partition 131 without a hole 132, so that the two adjacent cavities of the closed cavity are connected to the air inlet 114 and the air outlet 115 respectively. After the air flow enters the cavity on one side of the closed cavity, it can only flow in the opposite direction of the position of the closed cavity until it flows into the cavity on the other side of the closed cavity and flows out of the stagnant cavity 112 from the air outlet 115, ensuring that the air flow is guided along the annular channel.

[0048] Next, two adjacent partitions 131 form a "V" shape to buffer external impact, such as Figure 4-Figure 6 As shown, a movable fork 113 is provided on the inner wall of the stagnation chamber 112, a rotating block 133 is provided at the end of the partition 131, and the end of the rotating block 133 is rotatably set inside the movable fork 113, the partition 131 is sealed and movable in the stagnation chamber 112, and the end of the partition 131 away from the movable fork 113 is fixedly connected to the outer sheath 120, and a "V" structure is formed by two partitions 131, which is supported between the outer sheath 120 and the insulating, heat-conductive, moisture-proof sheath 102. When impacted, a triangular support structure is formed between the two partitions 131 and the outer sheath 120 to improve the strength of bearing impact.

[0049] In addition, a groove is provided at the connection between the movable fork 113 and the rotating block 133, and a coil spring 134 is fixedly connected between the rotating block 133 and the inner end of the groove. When the outer sheath 120 receives an impact force, the impact force acts between the two partitions 131 through the coil spring 134, pressing the outer sheath 120. On the basis that the outer sheath 120 is made of elastic plastic material, an elastic force is generated to deform and pull the partition 131 to rotate, so that the coil spring 134 rotates and twists to generate a rebound force, thereby buffering the damage to the inner core 101 caused by the impact force and improving the service life.

[0050] Furthermore, to achieve the conduction ventilation source 200, the air flow can be accelerated so that the air flow can remove the generated heat. Figure 7-Figure 8, further discloses a conduction ventilation source 200, a plurality of mounting grooves 121 are opened on the outer wall of the outer sheath 120, and the plurality of mounting grooves 121 correspond to the plurality of flow chambers 111 respectively. The conduction ventilation source 200 at least includes a sealing plug plate 210 inserted in the mounting groove 121, the sealing plug plate 210 is located at the outer wall of the inner cavity of the flow chamber 111 and is connected to a plurality of air nozzles 211, the sealing plug plate 210 is connected to a fitting limiter 220 away from the outer wall of the flow chamber 111, and a ventilation fan 221 for accelerating the air flow is arranged inside the fitting limiter 220, when the ventilation fan 221 is energized, the motor drives the fan inside it to rotate, and airflow is generated, when the fan rotates forward, a blowing force is generated, and when the fan rotates reversely, a suction force is generated, and the airflow enters the flow chamber 111 through the blowing force to ensure the structural integrity.

[0051] In addition, in order to improve the connection effect between the installation groove 121 and the sealing plug plate 210, the inner wall of the fitting limit body 220 is sealed and adapted to the outer wall of the outer sheath 120, and binding belts 230 are provided at both ends of the fitting limit body 220. The two binding belts 230 cooperate with the fitting limit body 220 to fit tightly on the outer wall of the outer sheath 120. The two binding belts 230 can be tied to the outer wall of the outer sheath 120, or the sub-Velcro and the mother Velcro are sewn on the outer walls of the two binding belts 230 respectively to achieve the adhesion and fixation of the two, so that the fitting limit body 220 fits tightly to the outer sheath 120, and the outer wall of the installation groove 121 is completely closed, the leakage of airflow is reduced, and the ventilation effect is ensured.

[0052] In addition, the cable body 100 section to be ventilated and heat-dissipated can be independently selected, which is beneficial for centralized heat dissipation and ventilation at locations with higher heat, and avoids the waste of resources caused by installing conduction ventilation sources 200 in all installation slots 121. A slide slot 122 connected to the installation slot 121 is provided on the inner wall of the outer sheath 120, and a sealing member 123 is slidably provided inside the slide slot 122. An elastic member 124 is fixedly connected between the end of the sealing member 123 and the slide slot 122. Under the elastic force of the elastic member 124 returning to its original position, the sealing member 123 is in a closed position. , driving the seal 123 to seal inside the mounting groove 121, so that when the mounting groove 121 is not installed with the conduction ventilation source 200, the seal 123 is located inside the mounting groove 121 for sealing, thereby avoiding airflow leakage and affecting the ventilation effect of the long section; conversely, when the sealing plug plate 210 is inserted into the mounting groove 121, the seal 123 is pushed to slide into the circulation cavity 111, and the elastic member 124 is compressed. Under the elastic force of the elastic member 124, the seal plug plate 210 is tightly attached, so that the airflow flows from the air nozzle 211.

[0053] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A self-temperature-controlling energy-saving cable, characterized in that: At least: A cable body (100), wherein the cable body (100) is provided with a plurality of inner cores (101), an insulating heat-conducting moisture-proof sheath (102) and an outer sheath (120) in sequence from the inside to the outside, a plurality of stagnation guide cavities (110) are provided between the insulating heat-conducting moisture-proof sheath (102) and the outer sheath (120), a buffer separation component (130) is provided inside the stagnation guide cavity (110), a "V"-shaped structure is formed by the buffer separation component (130) to be movably buffer-connected to the inner wall of the outer sheath (120), and an annular channel is formed between the buffer separation component (130) and the stagnation guide cavity (110); Two conduction ventilation sources (200) are respectively used for blowing and sucking airflows. The conduction ventilation sources (200) are connected and inserted inside the outer sheath (120) and guide the airflow along the annular channel.

2. The self-temperature-controlling energy-saving cable according to claim 1, characterized in that: The stagnation guide cavity (110) comprises a flow cavity (111) and a stagnation cavity (112) formed between the insulating heat-conducting moisture-proof sheath (102), an air inlet (114) being connected between the upper flow cavity (111) and the lower stagnation cavity (112), and an air outlet (115) being connected between the lower flow cavity (111) and the upper stagnation cavity (112); The conduction ventilation source (200) is in communication with the flow cavity (111).

3. The self-temperature-controlling energy-saving cable according to claim 2 is characterized in that: The buffer partition assembly (130) at least comprises a plurality of partitions (131) located inside the stagnant chamber (112), two adjacent partitions (131) are distributed in a "V"-shaped ring between the insulating heat-conducting moisture-proof jacket (102) and the outer jacket (120), and a plurality of holes (132) are provided on the surface of the partition (131); The holes (132) enable the airflow entering from the air inlet (114) to flow in an annular manner along the inner cavity of the stagnant cavity (112) and be guided to the air outlet (115).

4. The self-temperature-controlling energy-saving cable according to claim 3 is characterized in that: A cavity is formed between two adjacent partitions (131), the air inlet (114) and the air outlet (115) are respectively aligned with one cavity, and the two aligned cavities are separated into a closed cavity by a partition (131) without a hole (132).

5. The self-temperature-controlling energy-saving cable according to claim 4 is characterized in that: A movable fork (113) is provided on the inner wall of the stagnation chamber (112); a rotating block (133) is provided at the end of the partition (131); the end of the rotating block (133) is rotatably arranged inside the movable fork (113); the partition (131) is sealingly movable in the stagnation chamber (112); and the end of the partition (131) away from the movable fork (113) is fixedly connected to the outer sheath (120).

6. The self-temperature-controlling energy-saving cable according to claim 5, characterized in that: A groove is provided at the connection between the movable fork (113) and the rotating block (133), and a coil spring (134) is fixedly connected between the rotating block (133) and the inner end of the groove.

7. The self-temperature-controlling energy-saving cable according to claim 6, characterized in that: The outer wall of the outer sleeve (120) is provided with a plurality of mounting grooves (121), and the plurality of mounting grooves (121) respectively correspond to the plurality of circulation chambers (111); the conductive ventilation source (200) comprises at least a sealing plug plate (210) inserted into the mounting groove (121); the sealing plug plate (210) is located at the outer wall of the inner cavity of the circulation chamber (111) and is connected to a plurality of air nozzles (211); the sealing plug plate (210) is connected to a fitting limiter (220) away from the outer wall of the circulation chamber (111); a ventilation fan (221) for accelerating air flow is provided inside the fitting limiter (220).

8. The self-temperature-controlling energy-saving cable according to claim 7, characterized in that: The inner wall of the fitting limiter (220) is sealingly adapted to the outer wall of the outer sheath (120), and binding belts (230) are provided at both ends of the fitting limiter (220), and the fitting limiter (220) is tightly fitted to the outer wall of the outer sheath (120) through the two binding belts (230).

9. The self-temperature-controlling energy-saving cable according to claim 8, characterized in that: The inner wall of the outer sheath (120) is provided with a slide groove (122) connected to the installation groove (121); a sealing member (123) is slidably provided inside the slide groove (122); an elastic member (124) is fixedly connected between the end of the sealing member (123) and the slide groove (122); under the elastic force of the elastic member (124) returning to its original position, the sealing member (123) is driven to seal inside the installation groove (121).

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