Full-dry type high-voltage cable terminal

Abstract

The invention discloses a full-dry type high-voltage cable terminal, and relates to the technical field of cable terminals, the full-dry type high-voltage cable terminal comprises a sleeve, a wiring assembly, a supporting assembly and a cable, the sleeve is provided with a first end and a second end which are opposite to each other, a sleeve-shaped insulator is inserted into the inner side of the sleeve, a gap is reserved between the insulator and the sleeve, a sleeve-shaped semi-conductor is embedded into the inner side of the insulator, and the sleeve-shaped semi-conductor is connected with the wiring assembly. The through hole of the insulator and the through hole of the semi-conductor jointly form a wire passing channel, a filling layer is further arranged in the sleeve, the filling layer is located between the insulator and the sleeve to fill the gap, and the filling layer further extends towards the first end of the sleeve; the wiring assembly is arranged at the first end of the sleeve; the supporting assembly is arranged at the second end of the sleeve; the cable sequentially penetrates through the supporting assembly and the wire passing channel, and the cable is electrically connected with the wiring assembly. The full-dry type high-voltage cable terminal is provided with the solid insulating layer, the sleeve does not need to be filled with liquid silicone oil, and installation is easy and convenient and is not limited to vertical installation.

Description

Technical Field

[0001] The invention relates to the technical field of cable terminals, and in particular to a fully dry high-voltage cable terminal. Background Art

[0002] The cable terminal generally includes a cable and a sleeve that is sleeved on the outside of the cable. In order to facilitate the connection of the conductive terminal at the end of the cable, the insulation layer of the cable in the sleeve will be stripped, and at the same time, in order to restore the insulation capacity of the cable, an insulating material will be filled between the cable and the sleeve.

[0003] Commonly used insulating materials are liquid insulating agents, such as silicone oil, polyisobutylene, silicone gel, etc. The volume of these insulating materials is easily changed by temperature changes. Therefore, the space between the cable and the casing is not completely filled with insulating materials, but a cavity is reserved at a certain distance. Because of the existence of the cavity, the cable terminal is limited to vertical installation. If the cable terminal is set at an angle, the cavity may move to the stress cone, resulting in an increase in the electric field strength of the cable and concentration of electric field stress.

[0004] In addition, cable terminals using liquid insulating agents have high requirements for sealing. If the cable terminals are not properly maintained, the liquid insulating agent may easily leak out, and in the event of a failure, combustion, explosion and other hazards may occur. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a fully dry high-voltage cable terminal, which has a solid insulation layer, does not need to be filled with liquid silicone oil inside the bushing, is easy to install and is not limited to vertical installation.

[0006] According to an embodiment of the present invention, a fully dry high-voltage cable terminal comprises a bushing, wherein the bushing has a first end and a second end opposite to each other, a sleeve-shaped insulator is inserted inside the bushing, a gap is left between the insulator and the bushing, a sleeve-shaped semiconducting body is embedded inside the insulator, a through hole of the insulator and a through hole of the semiconducting body together constitute a wire-passing channel, a filling layer is further provided inside the bushing, the filling layer is located between the insulator and the bushing to fill the gap, and the filling layer also extends toward the first end of the bushing; A wiring assembly, the wiring assembly being disposed at the first end of the sleeve; a support assembly, the support assembly being disposed at the second end of the sleeve; The stripped cable passes through the support assembly and the wire passage in sequence, and the cable is electrically connected to the wiring assembly.

[0007] The fully dry high-voltage cable terminal according to the embodiment of the present invention has at least the following beneficial effects: the stripped cable passes through the sleeve, the semi-conductive shielding layer of the cable is at the position of the semi-conductor, the semi-conductor and the insulator form a stress cone, which is used to improve the electric field distribution of the cable and reduce the electric field stress; the solid filling layer is used to replace the original liquid silicone oil, which can further increase the insulation strength and prevent the high-voltage cable from creeping or breakdown; the solid filling layer will not flow, so the cable terminal is not limited to vertical installation, and when the installation position is limited, it can also be installed at an angle, and has a wider range of applications.

[0008] According to some embodiments of the present invention, the semiconductor is coaxial with the insulator, one end of the semiconductor is embedded in the wall of the insulator, and the other end of the semiconductor extends to the inside of the insulator and fits against the inner wall of the insulator.

[0009] According to some embodiments of the present invention, a connecting piece is provided at the second end of the bushing, and the insulator and the semiconductor are both connected to the bushing via the connecting piece.

[0010] According to some embodiments of the present invention, the second end of the sleeve is provided with a first flange portion, the connecting piece is provided with a second flange portion, the first flange portion and the second flange portion are connected, and the insulator and the semiconductor are both connected to the connecting piece.

[0011] According to some embodiments of the present invention, a pouring channel is formed in the second flange portion, and the pouring channel is communicated with the spacing area between the insulator and the bushing.

[0012] According to some embodiments of the present invention, the wiring assembly includes a cover and a terminal, wherein the cover is disposed on the first end of the sleeve, the terminal is passed through the cover, and the terminal extends into the sleeve to be connected to the cable.

[0013] According to some embodiments of the present invention, an adjustment mechanism is provided between the terminal post and the cover, and the adjustment mechanism is used to drive the terminal post to move along the axial direction of the sleeve.

[0014] According to some embodiments of the present invention, the adjustment mechanism includes a tightening ring and an adjusting bolt, wherein the tightening ring is sleeved on the terminal post and fixed to the terminal post, the adjusting bolt is passed through the tightening ring, and the adjusting bolt is also connected to the covering cover, and the adjusting bolt is used to change the distance between the tightening ring and the covering cover.

[0015] According to some embodiments of the present invention, a pressure cover is further provided on one side surface of the cover facing the tight ring, the cover is provided with a sealing groove, the sealing groove is arranged around the terminal, the terminal is sleeved with a sealing ring, and the sealing ring is placed in the sealing groove, the pressure cover is covered in the sealing groove, the pressure cover is in contact with the sealing ring, and the adjusting bolt is connected to the pressure cover.

[0016] According to some embodiments of the present invention, the support assembly includes a flange and a plurality of insulators, wherein the flange is covered on the second end of the bushing, the plurality of insulators are disposed on the flange, and the plurality of insulators are distributed around the axis of the bushing.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic structural diagram of a fully dry high-voltage cable terminal according to an embodiment of the present invention; Figure 2 It is a structural schematic diagram of a sleeve according to an embodiment of the present invention; Figure 3 It is a schematic structural diagram of an insulator, a semiconducting body and a filling layer according to an embodiment of the present invention; Figure 4 A schematic diagram of the structure of a wiring assembly according to an embodiment of the present invention; Figure 5 is a schematic structural diagram of an adjustment mechanism according to an embodiment of the present invention; Figure 6 It is a schematic structural diagram of a support assembly according to an embodiment of the present invention.

[0019] Figure Number: The bushing 100, the first flange portion 101, the insulator 110, the semiconducting body 120, the filling layer 130, the connector 140, the second flange portion 141, the casting channel 142, the terminal assembly 200, the cover 210, the terminal post 220, the support assembly 300, the flange 310, the insulator 320, the cable 400, the conductor segment 410, the insulating segment 420, the semiconducting shielding layer 430, the adjusting mechanism 500, the tightening ring 510, the adjusting bolt 520, the gland 600, and the sealing ring 700. DETAILED DESCRIPTION

[0020] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0021] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0023] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0024] The cable terminal generally includes a cable and a sleeve that is sleeved on the outside of the cable. In order to facilitate the connection of the conductive terminal at the end of the cable, the insulation layer of the cable in the sleeve will be stripped, and at the same time, in order to restore the insulation capacity of the cable terminal, an insulating material will be filled between the cable and the sleeve.

[0025] Commonly used insulating materials are liquid insulating agents, such as silicone oil, polyisobutylene, silicone gel, etc., but the volume of these insulating materials is easily affected by temperature changes. Therefore, the above-mentioned insulating materials will not be completely filled between the cable and the casing, but a cavity of a certain distance will be reserved. The cavity is generally occupied by air, which can be compressed and can adapt to the volume change of the insulating material within a certain range. In addition, in order to prevent the leakage of insulating materials and to ensure that the insulating materials are not contaminated and the insulating properties are changed, the interior of the cable terminal is a closed structure, that is, the insulating material is filled between the cable and the casing, and the cable terminal is sealed. Therefore, cable terminals using liquid insulating agents have high requirements for sealing and require periodic and long-term maintenance. If the cable terminals are not properly maintained, the sealing is prone to failure, resulting in leakage of liquid insulating agents.

[0026] Because of the existence of the cavity, the cable terminal using liquid insulating agent is limited to vertical installation, ensuring that the cavity is at the top of the cable terminal, which has little impact on the insulation performance. If the cable terminal is installed at an angle, the cavity may move to the stress cone of the cable terminal, affecting the normal operation of the stress cone, resulting in an increase in the electric field strength of the cable and concentration of electric field stress.

[0027] Reference Figure 1 As shown, a fully dry high-voltage cable terminal according to an embodiment of the present invention includes a bushing 100 , a wiring assembly 200 , a supporting assembly 300 and a cable 400 .

[0028] Reference Figure 2 As shown, the sleeve 100 has a first end and a second end opposite to each other, a sleeve-shaped insulator 110 is inserted into the inner side of the sleeve 100, a gap is left between the insulator 110 and the sleeve 100, a sleeve-shaped semiconducting body 120 is embedded in the inner side of the insulator 110, and the through hole of the insulator 110 and the through hole of the semiconducting body 120 together constitute a wire-passing channel, and a solid filling layer 130 is also provided in the sleeve 100, the filling layer 130 is located between the insulator 110 and the sleeve 100 to fill the gap, and the filling layer 130 also extends toward the first end of the sleeve 100.

[0029] The sleeve 100 can be made of silicone rubber or glass fiber impregnated with epoxy resin.

[0030] The insulator 110 and the semiconducting body 120 cooperate to form a stress cone structure. When the cable 400 is inserted into the casing 100, a specific part of the cable 400 is located at the semiconducting body 120. The stress cone structure is a device used to increase the diameter of the insulation shielding of the high-voltage cable. It is used to improve the electric field distribution of the cable, reduce the electric field strength at the edge of the metal sheath, and at the same time reduce the electric field stress and protect the insulating parts from damage. The insulator 110 can be cast by using a resin material, and the filling layer 130 can be cast by using a silicone rubber material. Of course, the resin material and the silicone rubber material are only the materials used in some embodiments or preferred embodiments. The insulator 110 can still be replaced by other materials, and the filling layer 130 can also be replaced by other materials, all of which are within the scope covered by the technical solution of the present invention. It should be understood that the filling layer 130 should be cast before the cable 400 is inserted.

[0031] The filling layer 130 is used to replace liquid insulating agents such as liquid silicone oil. Compared with liquid silicone oil cable terminals, the solid filling layer 130 can further increase the insulation strength of the cable and prevent creepage or breakdown of the high-voltage cable. The solid filling layer 130 will not flow, so the cable terminal is not limited to vertical installation. When the installation position is limited, it can also be installed at an angle, which has a wider range of applications.

[0032] Reference Figure 1 As shown, the wiring assembly 200 is arranged at the first end of the sleeve 100, the supporting assembly 300 is arranged at the second end of the sleeve 100, the stripped cable 400 passes through the supporting assembly 300 and the wire channel in sequence, and the cable 400 is electrically connected to the wiring assembly 200.

[0033] The wiring assembly 200 is used to connect the cable 400, and finally the wiring assembly 200 is connected with other electrical equipment. The support assembly 300 is used to connect the cable terminal with the installation platform, and plays a role in receiving and fixing the cable terminal.

[0034] The stripped cable 400 includes, from top to bottom, a conductor segment 410, an insulating segment 420, a semiconductive shielding layer 430, a metal layer, an outer sheath, etc. The cable 400 passes through the support assembly 300 and the wire passage in sequence, and the conductor segment 410 is electrically connected to the wiring assembly 200, and the semiconductive shielding layer 430 is maintained at the stress cone structure so that the semiconductive body 120 is in contact with the semiconductive shielding layer 430.

[0035] Preferably, the outer side wall of the bushing 100 may also be provided with an shed structure, and the shed structure may be arranged to have large and small sheds alternately distributed, so as to enhance creepage distance protection through the shed structure.

[0036] It can be understood that the semiconductor 120 is coaxial with the insulator 110 , and one end of the semiconductor 120 is embedded in the wall of the insulator 110 , and the other end of the semiconductor 120 extends to the inner side of the insulator 110 and fits against the inner wall of the insulator 110 .

[0037] The semiconducting body 120 is connected to the insulator 110 in an embedded manner, which can reduce the possibility of displacement of the semiconducting body 120 when the cable 400 passes through the wire passage, and can also prevent the semiconducting body 120 from being pulled out of the insulator 110 and becoming ineffective. The semiconducting body 120 is embedded in the wall of the insulator 110 and can be manufactured by casting.

[0038] For example, it can be understood that the second end of the bushing 100 is provided with a connecting piece 140 , and the insulator 110 and the semiconductor 120 are both connected to the bushing 100 via the connecting piece 140 .

[0039] Using the connector 140 as a basis, the connector 140 is set in the mold, and the semiconductor 120 is cast on the connector 140 in the first pouring operation. Further, the component consisting of the semiconductor 120 and the connector 140 is placed in the next mold, and the insulator 110 is poured on the connector 140 in the second pouring operation, and the insulator 110 covers one end of the semiconductor 120, that is, one end of the semiconductor 120 is embedded in the wall of the insulator 110. It should be understood that the above molding method is a preferred implementation method. If a one-time casting molding method or a multiple casting molding method is used, it should be understood as the technical solution of the present invention. Next, it is only necessary to connect the connector 140 to the sleeve 100, so that the insulator 110 and the semiconductor 120 can be placed in the sleeve 100.

[0040] In order to facilitate the connection and fixation between the connecting piece 140 and the sleeve 100, it can be understood that the second end of the sleeve 100 is provided with a first flange portion 101, the connecting piece 140 is provided with a second flange portion 141, the first flange portion 101 and the second flange portion 141 are connected, and the insulator 110 and the semiconductor 120 are both connected to the connecting piece 140.

[0041] It can be understood that the second flange portion 141 is provided with a pouring channel 142 , and the pouring channel 142 is communicated with the spacing area between the insulator 110 and the bushing 100 .

[0042] Reference Figure 3 As shown, the pouring channel 142 reserved on the second flange portion 141 is prepared for the pouring molding of the filling layer 130. After the connector 140 and the sleeve 100 are assembled, a gap is left between the insulator 110 and the inner wall of the sleeve 100, and the mold is placed in the sleeve 100. Silicone rubber is injected into the gap between the insulator 110 and the sleeve 100 through the pouring channel 142, and becomes the filling layer 130 after it is molded. Of course, other materials can also be used to cast and form the filling layer 130, all of which are within the technical scope of the present invention. The filling layer 130 should be poured before the cable 400 is inserted.

[0043] Reference Figure 4 As shown, it can be understood that the terminal assembly 200 includes a cover 210 and a terminal post 220 , the cover 210 is covered on the first end of the sleeve 100 , the terminal post 220 is passed through the cover 210 , and the terminal post 220 extends into the sleeve 100 to connect with the cable 400 .

[0044] The terminal 220 is used as a conductor to connect with the conductor segment 410 of the cable 400. The cover 210 is disposed on the first end of the sleeve 100 to seal the inside of the sleeve 100 and isolate the air to prevent the parts inside the sleeve 100 from getting wet.

[0045] It is understandable that an adjustment mechanism 500 is provided between the terminal post 220 and the cover 210 , and the adjustment mechanism 500 is used to drive the terminal post 220 to move along the axial direction of the sleeve 100 .

[0046] Since the filling layer 130 is used to replace the original liquid silicone oil, there is an interference fit between the cable 400 and the filling layer 130, and the bottom end of the cable 400 is fixed. In order to prevent the cable 400 from moving and causing the semi-conductive shielding layer 430 and the semi-conductive body 120 to be misaligned, an adjustment mechanism 500 is required to adjust the position of the cable 400 and limit the axial movement of the cable 400. Specifically, the adjustment mechanism 500 is used to drive the terminal 220 to move along the axial direction of the sleeve 100, and the terminal 220 is fixedly connected to the conductor segment 410, so the adjustment mechanism 500 can drive the cable 400 to move along the axial direction of the sleeve 100. It should be understood that the adjustment mechanism 500 is a small-range movement adjustment of the cable 400 to ensure that the semi-conductive shielding layer 430 of the cable 400 remains in contact with the semi-conductive body 120.

[0047] Reference Figure 5 As shown, it can be understood that the adjustment mechanism 500 includes a tightening ring 510 and an adjusting bolt 520. The tightening ring 510 is mounted on the terminal post 220, and the tightening ring 510 is fixed to the terminal post 220. The adjusting bolt 520 is passed through the tightening ring 510. The adjusting bolt 520 is also connected to the cover 210. The adjusting bolt 520 is used to change the distance between the tightening ring 510 and the cover 210.

[0048] After the cable 400 is installed by passing through the sleeve 100, the bottom end of the cable 400 is fixed. Since the cable 400 and the filling layer 130 are in an interference fit, and the bottom end of the cable 400 cannot move, the cable 400 has a tendency to move upward, or a slight displacement occurs upward. If the cable 400 has been displaced, it will inevitably cause the semi-conductive shielding layer 430 and the semi-conductive body 120 to be misaligned, affecting the effect of the semi-conductive body 120. At this time, the distance between the tightening ring 510 and the cover 210 can be shortened by adjusting the bolt 520, that is, the cable 400 is driven downward by the tightening ring 510, and the semi-conductive shielding layer 430 returns to the predetermined position. It should be understood that the tightening ring 510 is mounted on the terminal 220 and fixed to the terminal 220, and the tightening ring 510 can be connected to the terminal 220 by an interference fit.

[0049] It can be understood that a pressure cover 600 is further provided on the surface of the side of the cover 210 facing the tight ring 510, and the cover 210 is provided with a sealing groove, which is arranged around the terminal 220, and the terminal 220 is provided with a sealing ring 700, and the sealing ring 700 is placed in the sealing groove, and the pressure cover 600 is covered in the sealing groove, the pressure cover 600 is abutted against the sealing ring 700, and the adjusting bolt 520 is connected to the pressure cover 600.

[0050] The sealing ring 700 can further improve the sealing performance between the terminal 220 and the cover 210, and reduce the external air from entering the sleeve 100. The gland 600 is covered in the sealing groove, and the gland 600 is pressed against the sealing ring 700 to deform the sealing ring 700, thereby increasing the contact area between the sealing ring 700 and the sealing groove, and also increasing the contact area between the sealing ring 700 and the terminal 220, and the sealing performance is good. The gland 600 and the cover 210 can be fixedly connected by bolts. Preferably, the adjusting bolt 520 is connected to the gland 600, and the structure of the cover 210 is not destroyed, and the structural strength and sealing performance of the cover 210 are maintained. It should be understood that the adjusting bolt 520 is connected to the gland 600, and the gland 600 is fixed to the cover 210, that is, the adjusting bolt 520 is indirectly connected to the cover 210 through the gland 600, and it should also be understood that the adjusting bolt 520 is connected to the cover 210.

[0051] Reference Figure 6 As shown, it can be understood that the support assembly 300 includes a flange 310 and a plurality of insulators 320 , the flange 310 is covered on the second end of the bushing 100 , the plurality of insulators 320 are disposed on the flange 310 , and the plurality of insulators 320 are distributed around the axis of the bushing 100 .

[0052] The flange 310 is connected to the external bracket through the insulator 320. The insulator 320 plays the role of electrical isolation, and the flange 310 is used to support the cable terminal. Furthermore, a grounding terminal is also provided on the flange 310, and the metal sheath in the cable 400 is connected to the grounding terminal through a wire, and the grounding terminal is grounded at the same time to protect equipment and personnel. A tail tube is also provided between the flange 310 and the cable 400. After the cable 400 is inserted into the casing 100, the cable 400 needs to be corrected to ensure that the cable 400 is in the center of the tail tube. The tail tube is also used to protect the cable 400 and prevent water vapor or other contaminants outside the cable terminal from entering the inside of the casing 100 from the bottom.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fully dry high voltage cable terminal, characterized in that: include: A bushing (100), the bushing (100) having a first end and a second end opposite to each other, a sleeve-shaped insulator (110) inserted inside the bushing (100), a gap being left between the insulator (110) and the bushing (100), a sleeve-shaped semiconducting body (120) embedded inside the insulator (110), a through hole of the insulator (110) and a through hole of the semiconducting body (120) together forming a wire-passing channel, a solid filling layer (130) also being provided inside the bushing (100), the filling layer (130) being located between the insulator (110) and the bushing (100) to fill the gap, and the filling layer (130) also extending toward the first end of the bushing (100); A wiring assembly (200), the wiring assembly (200) being arranged at a first end of the sleeve (100); A support assembly (300), the support assembly (300) being arranged at the second end of the sleeve (100); The cable (400) is stripped and cut, and the cable (400) passes through the support assembly (300) and the wire passage in sequence, and the cable (400) is electrically connected to the wiring assembly (200).

2. The fully dry high-voltage cable terminal according to claim 1, characterized in that: The semiconducting body (120) is coaxial with the insulator (110), and one end of the semiconducting body (120) is embedded in the wall of the insulator (110), while the other end of the semiconducting body (120) extends to the inner side of the insulator (110) and fits with the inner wall of the insulator (110).

3. The fully dry high-voltage cable terminal according to claim 2, characterized in that: The second end of the bushing (100) is provided with a connecting piece (140), and the insulator (110) and the semiconductor (120) are both connected to the bushing (100) via the connecting piece (140).

4. The fully dry high-voltage cable terminal according to claim 3, characterized in that: The second end of the sleeve (100) is provided with a first flange portion (101), the connecting piece (140) is provided with a second flange portion (141), the first flange portion (101) and the second flange portion (141) are connected, and the insulator (110) and the semiconductor (120) are both connected to the connecting piece (140).

5. The fully dry high-voltage cable terminal according to claim 4, characterized in that: The second flange portion (141) is provided with a pouring channel (142), and the pouring channel (142) is communicated with the spacing area between the insulator (110) and the bushing (100).

6. The fully dry high-voltage cable terminal according to claim 1, characterized in that: The wiring assembly (200) comprises a cover (210) and a terminal (220), wherein the cover (210) is covered on the first end of the sleeve (100), the terminal (220) is passed through the cover (210), and the terminal (220) extends into the sleeve (100) to be connected to the cable (400).

7. The fully dry high-voltage cable terminal according to claim 6, characterized in that: An adjustment mechanism (500) is provided between the terminal post (220) and the cover (210), and the adjustment mechanism (500) is used to drive the terminal post (220) to move along the axial direction of the sleeve (100).

8. The fully dry high-voltage cable terminal according to claim 7, characterized in that: The adjustment mechanism (500) comprises a tightening ring (510) and an adjusting bolt (520); the tightening ring (510) is sleeved on the terminal (220), and the tightening ring (510) is fixed to the terminal (220); the adjusting bolt (520) is passed through the tightening ring (510), and the adjusting bolt (520) is also connected to the cover (210); the adjusting bolt (520) is used to change the distance between the tightening ring (510) and the cover (210).

9. The fully dry high-voltage cable terminal according to claim 8, characterized in that: A pressure cover (600) is also provided on a surface of the cover (210) on one side facing the tightening ring (510). The cover (210) is provided with a sealing groove, and the sealing groove is arranged around the terminal (220). The terminal (220) is sleeved with a sealing ring (700), and the sealing ring (700) is placed in the sealing groove. The pressure cover (600) is covered in the sealing groove, the pressure cover (600) is in contact with the sealing ring (700), and the adjusting bolt (520) is connected to the pressure cover (600).

10. The fully dry high voltage cable terminal according to claim 1, characterized in that: The support assembly (300) comprises a flange (310) and a plurality of insulators (320); the flange (310) is covered on the second end of the bushing (100); the plurality of insulators (320) are arranged on the flange (310), and the plurality of insulators (320) are distributed around the axis of the bushing (100).

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