Connecting bolts, cable connectors and high-voltage switchgear

Abstract

The present application relates to a connecting bolt, a cable connector and a high-voltage switch cabinet. A first connecting thread and a second connecting thread are formed on the outer wall of the connecting bolt, and the connecting bolt includes a copper split and a steel split. The peripheral wall of the copper split is provided with a first external thread and a second external thread, and the cross section of the copper split is fan-shaped; the steel split is plugged into the copper split, and the peripheral wall of the steel split is provided with a third external thread and a fourth external thread; the third external thread is used to engage with the first external thread when the steel split is plugged into the copper split, so that the first external thread and the third external thread together constitute the first connecting thread; the connecting bolt is composed of a structure of two different materials, steel and copper, which changes the single material structure of the traditional connecting bolt, which not only takes into account the strength of the connecting bolt but also increases the flow capacity of the connecting bolt, reduces the heat generation of the connecting bolt, and solves the problem of serious heat generation of the connecting bolt during use.

Description

Technical Field

[0001] The present application relates to the technical field of cable connection, and in particular to a connecting bolt, a cable connector and a high-voltage switch cabinet. Background Art

[0002] The cable connector of the traditional enclosed high-voltage switchgear includes a straight-through conductive rod, one end of which extends into the interior of the cabinet for conductive connection, and the other end of the conductive rod is provided with a common connecting bolt. One end of the connecting bolt is connected to the end of the conductive rod, and the other end passes through the mounting hole of the terminal to achieve conductive connection between the conductive rod and the terminal, so that the conductive rod is connected to the external cable through the terminal.

[0003] However, the connecting bolts of traditional cable connectors are made of stainless steel, which has poor overcurrent capacity, causing the connecting bolts to heat up severely during use. Since metal has good thermal conductivity, the heat will be transferred to the insulation layer of the cable connector, causing the insulation layer to age and reducing the service life of the cable connector. If the connecting bolts are made of pure copper, the overcurrent capacity will be greatly increased, which can solve the problem of bolt heating, but the strength of this type of connecting bolt is poor, causing the cable connector to easily loosen and deform. Summary of the invention

[0004] Based on this, it is necessary to provide a connecting bolt, a cable connector and a high-voltage switch cabinet to address the problems of low service life, easy loosening and deformation of the cable connector.

[0005] A connecting bolt, wherein a first connecting thread and a second connecting thread are formed on an outer wall of the connecting bolt, and the connecting bolt comprises:

[0006] A copper split body, wherein a first external thread and a second external thread are arranged on a peripheral wall of the copper split body, and the cross section of the copper split body is fan-shaped;

[0007] A steel split, the steel split is plugged into the copper split, and a third external thread and a fourth external thread are provided on the peripheral wall of the steel split; the third external thread is used to engage with the first external thread when the steel split is plugged into the copper split, so that the first external thread and the third external thread together constitute the first connecting thread; the fourth external thread is used to engage with the second external thread when the steel split is plugged into the copper split, so that the second external thread and the fourth external thread together constitute the second connecting thread; the cross-section of the steel split is fan-shaped.

[0008] In one of the embodiments, the copper split body is provided with a protrusion, and the steel split body is provided with a groove, and the protrusion is inserted into the groove so that the copper split body and the steel split body are plugged into each other.

[0009] In one of the embodiments, the protrusion extends along the axial direction of the copper split, and the groove is opened along the axial direction of the steel split, so that the steel split can be quickly plugged into the copper split, and the connecting bolts after plugging are not easy to separate from each other during the screw assembly process.

[0010] In one of the embodiments, the cross-section of the protrusion is bent, so that the steel split can be reliably plugged into the copper split; when the connecting bolt rotates, the rotation plane of the connecting bolt is parallel to the cross-section of the protrusion. Since the cross-section of the protrusion is bent, the copper split and the steel split will not separate from each other, so that the steel split and the copper split always rotate synchronously.

[0011] In one of the embodiments, the copper split body and the steel split body are both long strip structures, so that the copper split body and the steel split body form a long strip stud structure after being plugged in.

[0012] In one embodiment, the first external thread and the second external thread are respectively arranged at the two ends of the copper split, and the third external thread and the fourth external thread are respectively arranged at the two ends of the steel split, so that the two ends of the connecting stud after assembly are respectively formed with the first connecting thread and the second connecting thread.

[0013] In one embodiment, the copper split body is provided with a first abutment platform, which is located between the first external thread and the second external thread; the steel split body is provided with a second abutment platform, which is located between the third external thread and the fourth external thread, and the second abutment platform corresponds to the first abutment platform, so that the connecting bolt after plug-in assembly forms a boss structure for abutting against the terminal, so as to increase the contact area between the connecting bolt and the terminal and improve the current carrying capacity of the connecting bolt.

[0014] A cable connector comprises the connecting bolt described in any one of the above embodiments.

[0015] In one embodiment, the cable connector also includes a conductive rod, a terminal and an anti-loosening member, the conductive rod is provided with a first threaded hole, the first connecting thread is located in the first threaded hole and is threadedly connected to the conductive rod, the terminal is provided with a through hole, the connecting bolt is passed through the through hole, the anti-loosening member is provided with a second threaded hole, the second connecting thread is located in the second threaded hole and is threadedly connected to the anti-loosening member, the connecting bolt is passed through the terminal, and the connecting bolt is threadedly connected to the conductive rod and the anti-loosening member respectively, so that the terminal is electrically connected to the conductive rod through the connecting bolt.

[0016] A high-voltage switch cabinet comprises a cabinet body and the above-mentioned cable connector.

[0017] The above-mentioned connecting bolt, cable connector and high-voltage switch cabinet are provided with a first external thread and a second external thread on the peripheral wall of the copper split, and a third external thread and a fourth external thread on the peripheral wall of the steel split, and the steel split is plugged into the copper split, so that the third external thread is engaged with the first external thread, and the fourth external thread is engaged with the second external thread, so that the first connecting thread and the second connecting thread are formed on the outer wall of the connecting bolt; the connecting bolt includes a steel split and a copper split, and the cross-sections of the steel split and the copper split are both fan-shaped, so that the connecting bolt is composed of a structure of two different materials, steel and copper, that is, a structure combining steel and copper is adopted, which changes the single material structure of the traditional connecting bolt, which not only takes into account the strength of the connecting bolt but also increases the current capacity of the connecting bolt, reduces the heating of the connecting bolt, solves the problem of serious heating of the connecting bolt during use, prolongs the service life of the cable connector, and avoids the problem that the cable connector is easy to loosen and deform when the connecting bolt is made of pure copper. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the connection between a high-voltage switch cabinet and a cable according to an embodiment;

[0019] Figure 2 for Figure 1 A partial schematic diagram of a high voltage switchgear is shown;

[0020] Figure 3 for Figure 2 The schematic diagram of the connection between the cable connector and the cable of the high-voltage switch cabinet is shown;

[0021] Figure 4 for Figure 3 Exploded view of the cable connector shown;

[0022] Figure 5 for Figure 4 A schematic diagram of the conductive rod of the cable connector shown;

[0023] Figure 6 for Figure 5 A schematic diagram of another viewing angle of the conductive rod shown;

[0024] Figure 7 for Figure 4 A schematic diagram of the connecting bolts of the cable connector shown;

[0025] Figure 8 for Figure 7 Exploded view of the connecting bolts shown;

[0026] Fig. 9 for Figure 4 A schematic diagram of the wiring terminals of the cable connector shown;

[0027] Fig.10for Fig. 9 A cross-sectional view of the terminal block shown;

[0028] Fig.11 for Figure 4 A schematic diagram of the anti-loosening part of the cable connector shown;

[0029] Fig.12 for Figure 4 Schematic diagram of the nut of the cable connector shown. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the connection bolts, cable connectors and high-voltage switchgear will be described more comprehensively with reference to the relevant drawings. The preferred embodiments of the connection bolts, cable connectors and high-voltage switchgear are shown in the drawings. However, the connection bolts, cable connectors and high-voltage switchgear can be implemented in many different forms and are not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the connection bolts, cable connectors and high-voltage switchgear more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the connecting bolts, cable connectors and high-voltage switchgear herein are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0033] One embodiment is a connecting bolt, wherein a first connecting thread and a second connecting thread are formed on the outer wall of the connecting bolt, the connecting bolt includes a copper split and a steel split, the peripheral wall of the copper split is provided with a first external thread and a second external thread, and the cross-section of the copper split is fan-shaped; the steel split is plugged into the copper split, and the peripheral wall of the steel split is provided with a third external thread and a fourth external thread; the third external thread is used to engage with the first external thread when the steel split is plugged into the copper split, so that the first external thread and the third external thread together constitute the first connecting thread; the fourth external thread is used to engage with the second external thread when the steel split is plugged into the copper split, so that the second external thread and the fourth external thread together constitute the second connecting thread; the cross-section of the steel split is fan-shaped.

[0034] like Figure 1 As shown, a high-voltage switch cabinet 10 of an embodiment includes a cabinet body 100 and a cable connector 200. Figure 2 In one embodiment, the cable connector is electrically connected to the cabinet and the cable 20 respectively, so that the cable is electrically connected to the cabinet through the cable connector.

[0035] like Figure 3 and Figure 4 As shown, in one embodiment, the cable connector includes a connecting bolt 210. In one embodiment, the cable connector also includes a conductive rod 220, which is electrically connected to the cabinet. Figure 5 and Figure 6 As shown, in one embodiment, the conductive rod is provided with a first threaded hole 221 for threaded connection with the connecting bolt. In one embodiment, the conductive rod is plugged into the cabinet and electrically connected to the cabinet, so that the conductive rod is electrically connected to the cabinet.

[0036] In one embodiment, a first connecting thread and a second connecting thread are formed on the outer wall of the connecting bolt. Figure 7 and Figure 8As shown, the connecting bolt includes a copper split 213 and a copper split 215. The steel split is plugged into the copper split. In one embodiment, a first external thread 213a and a second external thread 213b are provided on the peripheral wall of the copper split. The cross section of the copper split is fan-shaped. A third external thread 215a and a fourth external thread 215b are provided on the peripheral wall of the steel split. The third external thread is used to engage with the first external thread when the steel split is plugged into the copper split, so that the first external thread and the third external thread together constitute the first connecting thread. In one embodiment, the fourth external thread is used to engage with the second external thread when the steel split is plugged into the copper split, so that the second external thread and the fourth external thread together constitute the second connecting thread. The cross section of the steel split is fan-shaped. In this embodiment, the cross section of the copper split is a cross section perpendicular to the axial direction of the copper split, and the cross section of the steel split is a cross section perpendicular to the axial direction of the steel split.

[0037] Since the copper split body is provided with a first external thread and a second external thread on the peripheral wall, and the steel split body is provided with a third external thread and a fourth external thread on the peripheral wall, and the steel split body is plugged into the copper split body, so that the third external thread is engaged with the first external thread, and the fourth external thread is engaged with the second external thread, the first connecting thread and the second connecting thread are formed on the outer wall of the connecting bolt. The connecting bolt includes a steel split body and a copper split body, and the cross-sections of the steel split body and the copper split body are both fan-shaped, so that the connecting bolt is composed of a structure of two different materials, steel and copper, that is, a structure combining steel and copper is adopted, which changes the single material structure of the traditional connecting bolt, which not only takes into account the strength of the connecting bolt but also increases the flow capacity of the connecting bolt, reduces the heating of the connecting bolt, solves the problem of serious heating of the connecting bolt during use, prolongs the service life of the cable connector, and avoids the problem of easy loosening and deformation of the cable connector when the connecting bolt is made of pure copper.

[0038] like Figure 7 and Figure 8 As shown, in order to make the copper split body and the steel split body plug together, in one embodiment, the copper split body is provided with a protrusion 213c. The steel split body is provided with a groove 215c, and the protrusion is inserted into the groove to make the copper split body and the steel split body plug together. In this embodiment, the protrusion is provided on the side of the copper split body adjacent to the steel split body, and the groove is provided on the side of the steel split body adjacent to the copper split body. It can be understood that in other embodiments, the setting position of the protrusion is not limited to being located on the side of the copper split body adjacent to the steel split body, and accordingly, the opening position of the groove is not limited to being located on the side of the steel split body adjacent to the copper split body.

[0039] In one embodiment, the protrusion includes a first protrusion and a second protrusion, and the first protrusion and the second protrusion are symmetrically arranged on a side of the copper part adjacent to the steel part. The groove includes a first groove and a second groove, and the first protrusion is inserted into the first groove, and the second protrusion is inserted into the second groove, so that the copper part and the steel part can be plugged more reliably.

[0040] like Figure 8 As shown, in order to enable the steel split to be quickly plugged into the copper split, and the connecting bolts after plugging in are not easily separated from each other during the screw assembly process, in one embodiment, the protrusion 213c extends along the axial direction of the copper split, and the groove is opened along the axial direction of the steel split, so that the steel split can be quickly plugged into the copper split, and the connecting bolts after plugging in are not easily separated from each other during the screw assembly process.

[0041] like Figure 8 As shown, in one embodiment, the cross section of the protrusion 213c is bent, so that the steel split can be reliably plugged into the copper split. When the connecting bolt rotates, the rotation plane of the connecting bolt is parallel to the cross section of the protrusion. Since the cross section of the protrusion is bent, the copper split and the steel split will not separate from each other, so that the steel split and the copper split always keep synchronous rotation. In this embodiment, the cross section of the protrusion is L-shaped, and correspondingly, the cross section of the groove is L-shaped. When the copper split and the steel split need to be assembled or disassembled, they are plugged or separated along the axial direction of the copper split and the axial direction of the steel split. When the connecting bolt rotates in the screw connection, the protrusion and the groove will not separate from each other, so that the copper split and the steel split can be reliably plugged. In this embodiment, the cross section of the protrusion is a cross section perpendicular to the extension direction of the protrusion. The cross-sectional direction of the cross section of the groove is parallel to the cross-sectional direction of the cross section of the protrusion. In this embodiment, the cross-sections of the first protrusion and the second protrusion are both bent, and the bending directions of the first protrusion and the second protrusion are opposite, which completely avoids the problem of separation of the copper split and the steel split during the rotation of the connecting bolt, allowing the copper split and the steel split to be better plugged in.

[0042] It is understood that the copper split is not limited to being provided with protrusions. The steel split is not limited to being provided with grooves, that is, the positions of the protrusions and the grooves can be interchanged. In other embodiments, the copper split is provided with a groove, and the steel split is provided with a protrusion, and the protrusion is inserted into the groove, so that the copper split is plugged into the steel split.

[0043] like Figure 4 As shown, in one embodiment, the cable connector further includes a terminal 230 and a locking member 240. In one embodiment, in one embodiment, the first connecting thread is located in the first threaded hole and is threadedly connected to the conductive rod. Fig. 9 and Fig.10As shown, the wiring terminal is provided with a through hole 231, and the connecting bolt is passed through the through hole, so that the connecting bolt is passed through the wiring terminal. Fig.11 As shown, the anti-loosening member is provided with a second threaded hole 241, and the second connecting thread is located in the second threaded hole and is threadedly connected to the anti-loosening member. The connecting bolts are threadedly connected to the conductive rod and the anti-loosening member respectively, so that the terminal is electrically connected to the conductive rod through the connecting bolts.

[0044] See also Figure 7 , the connecting bolt includes a first screw-on portion 210a and a second screw-on portion 210c. The first connecting thread is formed on the first screw-on portion, and the second connecting thread is formed on the second screw-on portion. In the present embodiment, the first screw-on portion is located in the first threaded hole and is threadedly connected to the conductive rod. The second screw-on portion is inserted into the through hole. The second screw-on portion is located in the second threaded hole and is threadedly connected to the anti-loosening member, so that the connecting bolt is threadedly connected to the conductive rod and the anti-loosening member respectively, and the conductive rod is electrically connected to the cable through the connecting bolt and the terminal in turn. In the present embodiment, the first threaded portion and the second screw-on portion are respectively the two ends of the connecting bolt. The anti-loosening member abuts against the side of the terminal away from the connecting bolt. The terminal is used to be electrically connected to the cable. The connecting bolt is inserted into the terminal, and the connecting bolt is threadedly connected to the conductive rod and the anti-loosening member respectively, so that the terminal is electrically connected to the conductive rod through the connecting bolt.

[0045] Since both ends of the abutting portion are connected to the first screw connection portion and the second screw connection portion respectively, the first screw connection portion is located in the first threaded hole and is threadedly connected to the conductive rod, the second screw connection portion is inserted into the through hole, and the second screw connection portion is located in the second threaded hole and is threadedly connected to the anti-loosening member, and the terminal is electrically connected to the cable, so that the connecting bolts are threadedly connected to the conductive rod and the anti-loosening member respectively, and the conductive rod is electrically connected to the cable through the connecting bolts and the terminal in sequence. Since the conductive rod is electrically connected to the cabinet, the cable is electrically connected to the cabinet.

[0046] See again Figure 7 In one embodiment, the connecting bolt further comprises an abutment portion 210b, the two ends of which are respectively connected to the first threaded portion and the second threaded portion. In this embodiment, the abutment portion is located between the first threaded portion and the second threaded portion. In one embodiment, the abutment portion is provided with a first abutment surface and a second abutment surface connected to each other. Fig.10 As shown, the connection terminal is further provided with a positioning cavity 233 communicating with the through hole, the first abutting surface is located in the through hole and abuts against the connection terminal, and the second abutting surface is located in the positioning cavity and abuts against the connection terminal.

[0047] In one embodiment, there is an angle between the first abutting surface and the second abutting surface, that is, the first abutting surface and the second abutting surface are not coplanar, so that the contact area between the terminal and the conductive rod is larger, and the terminal is not easy to tilt during installation, which changes the problem of poor contact between the terminal and the conductive rod of the traditional cable connector, which is only a circular ring, thereby improving the service life of the cable connector. In this embodiment, the cross-sections of the through hole and the positioning cavity are both circular. Figure 7 As shown, correspondingly, the cross-sections of the first abutting surface 211 and the second abutting surface 212 are both circular, and the diameter of the first abutting surface is smaller than the diameter of the second abutting surface, which can better prevent the terminal from tilting during installation.

[0048] The first abutting surface is located in the through hole and abuts against the wiring terminal. Since the wiring terminal is provided with a positioning cavity connected to the through hole, the second abutting surface is located in the positioning cavity and abuts against the wiring terminal, so that the connecting bolt abuts against the wiring terminal through the first abutting surface and the second abutting surface at the same time. Since there is an angle between the first abutting surface and the second abutting surface, that is, the first abutting surface and the second abutting surface are not coplanar, the contact area between the connecting bolt and the wiring terminal is larger, thereby solving the problem of poor contact between the wiring terminal and the conductive rod and improving the service life of the cable connector.

[0049] In order to improve the flow capacity of the cable connector, in one embodiment, the second abutting surface is a conical inclined surface. The positioning cavity is a cavity structure adapted to the conical inclined surface, that is, the inner wall of the positioning cavity is formed with a conical fitting surface adapted to the second abutting surface, so that the second abutting surface is in close contact with the inner wall of the positioning cavity, effectively eliminating the hidden danger of relative tilt between the wiring terminal and the connecting bolt during the installation of the cable connector, increasing the contact area between the wiring terminal and the connecting bolt, thereby improving the flow capacity of the cable connector. In this embodiment, the second abutting surface is a frustum-shaped contour structure, so that the second abutting surface and the positioning cavity are better aligned and abutted.

[0050] In order to improve the current carrying capacity of the cable connector, in one embodiment, the tapered inclined surface is provided at the end of the abutting portion adjacent to the second threaded portion. When the connecting bolt is inserted into the sleeve hole, the first abutting surface and the second abutting surface can simultaneously abut against the inner wall of the terminal block, thereby improving the current carrying capacity of the cable connector. In one embodiment, the diameter of the cross section of the tapered inclined surface gradually decreases in the direction away from the conductive rod, which can better prevent the terminal block from swinging when installed on the connecting bolt.

[0051] In order to accurately align and abut the second abutting surface with the inner wall of the positioning cavity, and to make the abutment area between the second abutting surface and the inner wall of the positioning cavity larger, in one embodiment, the angle of the tapered inclined surface is 45° to 85°, so that the second abutting surface is accurately aligned and abutted with the inner wall of the positioning cavity, and the abutment area between the second abutting surface and the inner wall of the positioning cavity is larger. In this embodiment, the angle of the tapered inclined surface is 60°, so that the abutment area between the second abutting surface and the inner wall of the positioning cavity is larger and has better anti-tilt installation performance.

[0052] like Fig.12 As shown, in order to improve the flow capacity of the connecting bolt, in one embodiment, the cable connector further includes a nut 250, which is sleeved on the second threaded portion and threadedly connected to the second threaded portion. Fig.10 , the terminal is also provided with a receiving chamber 234 connected with the through hole, the nut is located in the receiving chamber and abuts against the terminal, so that the terminal is in close contact with the nut, so that the terminal can also be electrically connected to the connecting bolt through the nut, thereby improving the current carrying capacity of the connecting bolt. In this embodiment, the receiving chamber is formed on the end face of the terminal adjacent to the anti-loosening member. The nut is axially provided with a threaded hole 252 threadedly connected with the second threaded portion, so that the nut is sleeved on the second threaded portion and threadedly connected with the second threaded portion, and the nut has better strength. In other embodiments, the threaded hole may not be limited to being opened along the axial direction of the nut.

[0053] like Fig.12 As shown, in one embodiment, the outer wall of the nut is provided with a spherical convex surface 253. Fig.10 , the inner wall of the accommodating cavity is formed with a spherical concave surface 234a adapted to the spherical convex surface, so that the contact area between the nut and the inner wall of the accommodating cavity is larger, so that the contact between the terminal and the nut is closer, the contact area between the terminal and the connecting bolt is increased, and the current capacity of the cable connector is enhanced. In this embodiment, the spherical convex surface is arranged at one end of the nut, so that the spherical convex surface is better abutted against the inner wall of the accommodating cavity. In one embodiment, the outer wall of the nut is provided with a tightening portion, so that the tightening portion is screwed by a tool to tighten the nut to the second screw connection portion. In this embodiment, the tightening portion is an outer hexagonal prism structure, so that the tightening portion can be screwed by a wrench. In other embodiments, the tightening portion can also be a structure such as an inner hexagon or an inner spline hole. In this embodiment, the spherical concave surface is a concave arc inner cavity structure. The spherical convex surface is a convex arc fitting surface structure, so that the spherical convex surface is in close contact with the spherical concave surface.

[0054] In one of the embodiments, the area and thickness of the through hole of the terminal are increased, a conical inner cavity is set at the entrance of the through hole of the terminal, and a conical fitting surface matching the conical inner cavity is set on the conductive bolt. When connected, the conical fitting surface of the conductive bolt is in close contact with the conical inner cavity on the through hole of the terminal, which can effectively prevent the hidden danger of the terminal tilting relative to the conductive bolt during installation, and can increase the contact area between the terminal and the conductive bolt, thereby enhancing the current carrying capacity. In addition, a concave arc-shaped inner cavity is set at the outlet of the through hole of the terminal, and a convex arc-shaped nut matching the concave arc-shaped inner cavity is added to the conductive bolt. The convex arc-shaped nut is placed in the through hole of the terminal, and the convex arc-shaped fitting surface of the convex arc-shaped nut is in close contact with the concave arc-shaped inner cavity at the outlet of the terminal installation hole, further increasing the contact area between the terminal and the conductive bolt, thereby improving the current carrying capacity of the cable connector.

[0055] like Fig.11 As shown, in one embodiment, the end of the anti-loosening member adjacent to the terminal is provided with a first one-way anti-reverse helical gear ring 242. Fig. 9 The end of the connection terminal adjacent to the anti-loosening member is provided with a second one-way anti-reverse helical gear ring 235. The first one-way anti-reverse helical gear ring abuts against the second one-way anti-reverse helical gear ring.

[0056] When the anti-loosening member rotates relative to the second screw connection portion in a direction close to the wiring terminal, the first one-way anti-reverse helical gear ring and the second one-way anti-reverse helical gear ring slide relative to each other. When the anti-loosening member rotates relative to the second screw connection portion in a direction away from the wiring terminal, the first one-way anti-reverse helical gear ring and the second one-way anti-reverse helical gear ring are locked with each other, so that the anti-loosening member can only rotate in a direction close to the wiring terminal. Even if the anti-loosening member can only rotate in a direction to lock the wiring terminal, the anti-loosening member can be effectively prevented from loosening, so that the wiring terminal can be reliably connected to the connecting bolt. In this embodiment, matching one-way anti-reverse helical gear rings are respectively provided on the contact surface of the anti-loosening member and the wiring terminal to play a one-way anti-rotation role. Specifically, when the anti-loosening member rotates forward in the tightening direction, the one-way anti-reverse helical gear ring will not limit the rotation of the anti-loosening member. When the anti-loosening member rotates reversely in the loosening direction, the one-way anti-reverse helical gear ring limits the rotation of the anti-loosening member, thereby preventing the anti-loosening member from loosening after long-term use or vibration.

[0057] In one embodiment, the first one-way anti-reverse helical gear ring is arranged around the second threaded hole, and the second one-way anti-reverse helical gear ring is arranged around the through hole, so that the first one-way anti-reverse helical gear ring and the second one-way anti-reverse helical gear ring are better in contact with each other.

[0058] like Fig.11As shown, in one embodiment, the first one-way non-return helical gear ring is provided with a plurality of helical teeth 242a, and the plurality of helical teeth are distributed at intervals along the circumference of the second threaded hole. Each helical tooth is provided with a first inclined surface. In one embodiment, the second one-way non-return helical gear ring is provided with a plurality of helical tooth grooves 235a. In this embodiment, the inner wall of each helical tooth groove is provided with a second inclined surface, and the inclination angle of the second inclined surface is 3° to 8°. The second inclined surface of each helical tooth is adapted to abut against the corresponding first inclined surface, so that the first one-way non-return helical gear ring is in abutment with the second one-way non-return helical gear ring.

[0059] like Figure 4 As shown, in one embodiment, the cable connector also includes a plug 260, and the plug is provided with a third threaded hole 262. The second threaded portion is at least partially located in the third threaded hole and is threadedly connected to the plug. The plug abuts against the anti-loosening member, so that the plug limits the anti-loosening member on the second threaded portion to prevent the anti-loosening member from loosening on the second threaded portion, thereby preventing the anti-loosening member from loosening. In this embodiment, the plug is an insulating plug, so that the plug has insulation. In one embodiment, the plug abuts against the end of the anti-loosening member that is away from the terminal, so that the plug better abuts against the anti-loosening member. In this embodiment, the plug is an insulating plug, so that the plug has insulation, and the plug abuts against the side of the anti-loosening member that is away from the terminal, so as to avoid the situation of electric shock caused by directly touching the anti-loosening member during use.

[0060] like Figure 2 As shown, in one embodiment, the cable connector further includes a protective sleeve 270, which is respectively covered on the outer wall of the wiring terminal and the conductive rod, so that the wiring terminal and the conductive rod are located in the protective sleeve, thereby preventing the user from directly touching the wiring terminal and the conductive rod during use and posing the risk of electric shock. In this embodiment, part of the protective sleeve is also covered on the position where the wiring terminal is connected to the cable and on the cable, thereby improving the safety of the cable connector.

[0061] In one embodiment, the cable connector further includes a plug and a protective sleeve. The plug is an insulating plug. The plug is provided with a third threaded hole. The second threaded portion is at least partially located in the third threaded hole and is threadedly connected to the plug. The plug abuts against the anti-loosening member, so that the plug limits the anti-loosening member on the second threaded portion to prevent the anti-loosening member from loosening on the second threaded portion, thereby preventing the anti-loosening member from loosening. The protective sleeve is respectively coated on the outer walls of the wiring terminal, the conductive rod and the plug, so that the wiring terminal and the conductive rod are located in the protective sleeve, thereby preventing the user from directly touching the wiring terminal and the conductive rod during use and posing the risk of electric shock. The protective sleeve and the plug are jointly arranged on the cable connector to prevent the wiring terminal, the conductive rod and the connecting bolts from being directly exposed, thereby improving the safety of the cable connector.

[0062] In one embodiment, the first external thread and the second external thread are respectively disposed at two ends of the copper split body. In one embodiment, the third external thread and the fourth external thread are respectively disposed at two ends of the steel split body, so that the two ends of the connecting stud after assembly are respectively formed with the first connecting thread and the second connecting thread.

[0063] In one embodiment, the copper part and the steel part are both long strip structures, so that the connecting bolt forms a long strip stud structure after the copper part and the steel part are plugged in. In this embodiment, the first connecting thread and the second connecting thread are respectively formed at the two axial ends of the connecting bolt.

[0064] In this embodiment, the conductive bolt adopts a combination of a quarter copper part and a three-quarter steel part. In other embodiments, according to actual needs, a combination of a half copper part and a half steel part, or a combination of three-quarter copper part and a quarter steel part, or a combination of other proportions can also be adopted.

[0065] In one embodiment, the copper split body is provided with a first abutment platform, and the first abutment platform is located between the first external thread and the second external thread. The steel split body is provided with a second abutment platform, and the second abutment platform is located between the third external thread and the fourth external thread. The second abutment platform corresponds to the first abutment platform, so that the connecting bolt after plug-in assembly forms a boss structure for abutting against the terminal, so as to increase the contact area between the connecting bolt and the terminal, and improve the flow capacity of the connecting bolt. In this embodiment, the first abutment platform and the second abutment platform jointly form the abutment portion of the connecting bolt.

[0066] In one of the embodiments, the number of connecting bolts of the cable connector is two, and the conductive rod is electrically connected to the two connecting bolts respectively, so that the conductive rod is electrically connected to the corresponding cables through the two connecting bolts respectively, so that the conductive rod can be electrically connected to the two cables at the same time, so that each cable connector can be electrically connected to the two cables at the same time.

[0067] like Figure 5 As shown, in one embodiment, the conductive rod is T-shaped, so that the first end 220a of the conductive rod is electrically connected to the cabinet, the second end 220b is electrically connected to one of the cables, and the third end 220c is electrically connected to another cable. The connecting line between the second end and the third end is perpendicular to the extension direction of the first end. In this embodiment, the second end and the third end have the same structure and are both connected to the corresponding connecting bolts by threaded connection. In one embodiment, the conductive rod is electrically connected to the cabinet and the two connecting bolts respectively.

[0068] like Figure 5As shown, in one embodiment, the conductive rod includes an inserting portion 222, a connecting portion 223, a sleeve portion 224 and a conductive body 225. The inserting portion is plugged into the cabinet and electrically connected to the cabinet. The connecting portion is connected to the inserting portion, and the inserting portion and the connecting portion are coaxially arranged, so that the structure of the conductive rod is relatively simple and easy to manufacture and process.

[0069] like Figure 5 As shown, in one of the embodiments, the connecting portion is connected to the cabinet body so that the conductive rod is connected to the cabinet body. The sleeve portion is connected to the end of the connecting portion away from the insertion portion. The axial direction of the sleeve portion is perpendicular to the axial direction of the connecting portion. The sleeve portion is provided with a sleeve hole 224a in the axial direction. The conductive body is inserted into the sleeve hole and connected to the sleeve portion, and the two ends of the conductive body are electrically connected to the two connecting bolts respectively. In this embodiment, the two ends of the conductive body are respectively screwed with the corresponding connecting bolts, so that the two ends of the conductive body are respectively electrically connected to the two connecting bolts. In one of the embodiments, the two ends of the conductive body are respectively provided with a first threaded hole, so that the two ends of the conductive body can be screwed with the corresponding connecting bolts respectively.

[0070] In one of the embodiments, the area of ​​the cross section of the conductive body decreases from the axial end to the middle position, and the sleeve portion is sleeved at the middle position of the conductive body. Since the sleeve portion is sleeved at the middle position of the conductive body, the sleeve portion is connected to the middle position of the conductive body, so that the weight of the conductive body decreases from the axial end to the middle position, thereby improving the bending strength of the conductive body. In this embodiment, the axial direction of the conductive body is perpendicular to the cross-sectional direction of the cross section. The conductive body extends from one axial end to the other axial end in the axial direction. The middle position of the conductive body is located at the middle position of the conductive body extending in the axial direction. The cross-sectional shape of any cross section of the conductive body is circular, and the cross-sectional areas of the two axial ends of the conductive body are smaller than the cross-sectional area of ​​the middle position of the conductive body.

[0071] The above-mentioned conductive rod, cable connector and high-voltage switch cabinet, because the connecting part is connected to the insertion part and the sleeve part respectively, the connecting part and the insertion part are coaxially arranged, so that the sleeve part is connected to the insertion part through the connecting part, and because the insertion part is plugged into the cabinet and electrically connected to the cabinet, the sleeve part is connected to the cabinet through the connecting part and the inserting part in sequence, so that the sleeve part is electrically connected to the cabinet. Since the sleeve part is provided with a sleeve hole in the axial direction, the conductive body is inserted into the sleeve hole and connected to the sleeve part, so that the conductive body is installed along the axial direction of the sleeve part, and since the axial direction of the sleeve part is perpendicular to the axial direction of the connecting part, the conductive body occupies less space in the depth direction of the cable connector after being installed in the sleeve part, so that the cable connector is subjected to less bending moment after the conductive body is connected to the connecting bolt, so that the cable connector is not easily deformed or even damaged. Since the two ends of the conductive body are electrically connected to the two connecting bolts respectively, the conductive body can be electrically connected to the two connecting bolts at the same time, and connected to the corresponding wiring terminals through the two connecting bolts, so that the cable connector can be connected to the two wiring terminals at the same time, so as to be electrically connected to two different cables at the same time. The above-mentioned cable connector changes the defect that the traditional cable connector can only continue to connect the conductive rod in series along the direction in which the conductive rod is connected to the cabinet, and solves the problem of poor electrical contact of the cable.

[0072] In order to reliably connect the conductive body with the sleeve part, in one embodiment, the outer wall of the conductive body is formed with a first mounting thread. The inner wall of the sleeve hole is provided with a second mounting thread adapted to the first mounting thread, so that the conductive body and the sleeve part are threadedly connected, thereby reliably connecting the conductive body and the sleeve part.

[0073] It can be understood that in other embodiments, the conductive body is not limited to being connected to the inner wall of the sleeve hole by threaded connection. In one embodiment, the conductive body is snap-fitted to the inner wall of the sleeve hole to achieve quick assembly and disassembly of the conductive body and the sleeve portion. Of course, in order to firmly connect the conductive body and the sleeve portion, in one embodiment, the conductive body is also welded to the sleeve portion to firmly connect the conductive body and the sleeve portion.

[0074] In order to better insert the insertion part into the cabinet and facilitate the insertion of the insertion part into the cabinet, in one embodiment, the insertion part is a frustum structure, which allows the insertion part to be better inserted into the cabinet and facilitates the insertion of the insertion part into the cabinet.

[0075] In one embodiment, a first threaded hole is provided at the end of each conductive body, and the first threaded hole is used to be threadedly connected with the corresponding connecting bolt, so that the end of each conductive body is firmly connected with the corresponding connecting bolt. In this embodiment, the first threaded hole is a first threaded hole. In one embodiment, first threaded holes are respectively provided at both ends of the conductive body, so that the two ends of the conductive body can be threadedly connected with the corresponding connecting bolts respectively.

[0076] like Figure 5 and Figure 6 As shown, in one embodiment, the conductive body includes a conductive shell 225a, a first core 225b and a second core 225c. The conductive shell is inserted into the sleeve hole and connected to the sleeve portion. The two ends of the conductive shell are respectively provided with a first accommodating cavity 2252 and a second accommodating cavity 2253. The first core is located in the first accommodating cavity and connected to the conductive shell. The second core is located in the second accommodating cavity and connected to the conductive shell, so that the conductive shell is electrically connected to the first core and the second core respectively. The first core and the second core are used to be electrically connected to the two connecting bolts respectively, that is, the first core is electrically connected to one of the connecting bolts, and the second core is electrically connected to the other connecting bolt, so that the conductive shell is electrically connected to the two connecting bolts respectively, so that the two ends of the conductive body are electrically connected to the two connecting bolts respectively. In this embodiment, the first core and the second core are both provided with a first threaded hole. In this embodiment, a first threaded hole is formed at one end of the first core body away from the second core body, and a first threaded hole is formed at one end of the second core body away from the first core body, so that the first core body and the second core body are respectively threadedly connected with corresponding connecting bolts.

[0077] In one embodiment, the first accommodating cavity is connected to the second accommodating cavity, so that the weight of the conductive shell is relatively light. In order to improve the connection strength of the conductive shell, in one embodiment, a plurality of reinforcing ribs are provided on the inner wall of the conductive shell, so that the conductive shell has a good connection strength. In this embodiment, the plurality of reinforcing ribs are distributed at intervals along the circumference of the conductive shell, so that the connection strength of each position of the conductive shell is relatively uniform.

[0078] In one of the embodiments, the conductive shell is detachably connected to the first core and the second core, respectively. When the first core needs to be maintained or replaced, the first core can be removed from the conductive shell. Similarly, when the second core needs to be maintained or replaced, the second core can be removed from the conductive shell, which improves the convenience of using the conductive rod. Since the first core and the second core can be removed and replaced separately, the problem of high cost caused by the overall replacement of the conductive shell is avoided. In this embodiment, the conductive shell is plug-in connected to the first core and the second core, respectively. In one of the embodiments, the conductive shell is provided with a first slot and a second slot, the first slot is connected to the first accommodating cavity, and the second slot is connected to the second accommodating cavity. The first core is located in the first accommodating cavity and inserted into the first slot, so that the conductive shell is plug-in connected to the first core. The second core is located in the second accommodating cavity and inserted into the second slot, so that the conductive shell is plug-in connected to the second core.

[0079] It is understood that in other embodiments, the conductive housing is not limited to being plug-in connected to the first core and the second core, respectively. In one embodiment, the conductive housing is threadedly connected to the first core and the second core, respectively, so that the first core and the second core are both reliably connected to the conductive housing.

[0080] like Figure 6 As shown, in one embodiment, the high-voltage switch cabinet further includes a locking piece (not shown), the connecting portion is provided with a connecting hole 223a, the cabinet body is provided with a fixing hole, and the locking piece is respectively passed through the connecting hole and the fixing hole, so that the connecting portion is fixedly connected to the cabinet body through the locking piece.

[0081] In order to enable the high-voltage switch cabinet to be electrically connected to multiple different cables at the same time and to make full use of the space in the cabinet, in one embodiment, there are multiple cable connectors, and each cable connector is staggered and arranged on the cabinet, so that the high-voltage switch cabinet can be electrically connected to multiple different cables at the same time and to make full use of the space in the cabinet.

[0082] The above cable connector has the following advantages compared with the traditional cable connector:

[0083] 1) The conductive rod of the cable connector adopts a T-shaped structure. One end of the conductive rod is connected to the inside of the high-voltage switch cabinet, and the other two ends are respectively connected to a terminal, thereby realizing one input and two outputs, that is, one cable connector can be connected to two terminals at the same time, without affecting the structural stability of the cable connector and increasing its occupied space in the depth direction.

[0084] 2) Change the structure of the connecting bolt and the terminal to increase the contact area and prevent the terminal from tilting during installation. Increase the area and thickness of one end of the terminal through hole, set a conical inner cavity at the entrance of the terminal through hole, set a conical fitting surface matching the conical inner cavity on the connecting bolt, and when connected, the conical fitting surface of the connecting bolt is in close contact with the conical inner cavity on the terminal through hole, which can effectively eliminate the hidden danger of the terminal tilting relative to the connecting bolt during installation, and can increase the contact area between the terminal and the connecting bolt, thereby enhancing the flow capacity. In addition, a concave arc-shaped inner cavity is set at the outlet of the terminal through hole, and a convex arc-shaped nut matching the concave arc-shaped inner cavity is added to the connecting bolt. The convex arc-shaped nut is placed in the through hole of the terminal, and the convex arc-shaped fitting surface of the convex arc-shaped nut is in close contact with the concave arc-shaped inner cavity at the outlet of the terminal through hole, which can further increase the contact area between the terminal and the connecting bolt, thereby enhancing the flow capacity of the cable connector.

[0085] 3) Change the material of the connecting bolts. The connecting bolts are made of a combination of copper and stainless steel, which not only takes into account the strength of the connecting bolts, but also increases the flow capacity of the connecting bolts and reduces heat generation.

[0086] 4) Matching one-way anti-reverse helical gear rings are provided on the contact surfaces of the anti-loosening part and the terminal. When the anti-loosening part rotates in the forward direction of tightening, the one-way anti-reverse helical gear ring will not restrict the rotation of the anti-loosening part. When the anti-loosening part rotates in the reverse direction of loosening, the one-way anti-reverse helical gear ring will restrict the rotation of the anti-loosening part, thereby preventing the anti-loosening part from loosening after long-term use or vibration.

[0087] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0088] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be noted that, for a person of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A connecting bolt, wherein a first connecting thread and a second connecting thread are formed on an outer wall of the connecting bolt, characterized in that: The connecting bolts include: A copper split body, wherein a first external thread and a second external thread are arranged on a peripheral wall of the copper split body, and the cross section of the copper split body is fan-shaped; A steel split body, the steel split body is plugged into the copper split body, and a third external thread and a fourth external thread are provided on the peripheral wall of the steel split body; the third external thread is used to engage with the first external thread when the steel split body is plugged into the copper split body, so that the first external thread and the third external thread together constitute the first connecting thread; the fourth external thread is used to engage with the second external thread when the steel split body is plugged into the copper split body, so that the second external thread and the fourth external thread together constitute the second connecting thread; the cross section of the steel split body is fan-shaped; The copper split body is provided with a first abutment platform, which is located between the first external thread and the second external thread; the steel split body is provided with a second abutment platform, which is located between the third external thread and the fourth external thread, and the second abutment platform corresponds to the first abutment platform, so that the connecting bolt after plug-in assembly forms a boss structure for abutting against the terminal.

2. The connecting bolt according to claim 1, characterized in that: The copper split body is provided with a protrusion, the steel split body is provided with a groove, and the protrusion is inserted into the groove.

3. The connecting bolt according to claim 2, characterized in that: The protrusion extends along the axial direction of the copper split body, and the groove is opened along the axial direction of the steel split body.

4. The connecting bolt according to claim 3, characterized in that: The cross section of the protrusion is bent.

5. The connecting bolt according to any one of claims 1 to 4, characterized in that: The copper body and the steel body are both long strip structures.

6. The connecting bolt according to any one of claims 1 to 4, characterized in that: The first external thread and the second external thread are respectively arranged at two ends of the copper split body, and the third external thread and the fourth external thread are respectively arranged at two ends of the steel split body.

7. The connecting bolt according to claim 1, characterized in that: The first abutment platform and the second abutment platform together form an abutment portion of the connecting bolt, and the abutment portion is provided with a first abutment surface and a second abutment surface connected to each other, and an angle is formed between the first abutment surface and the second abutment surface.

8. A cable connector, characterized in that: The invention comprises the connecting bolt according to any one of claims 1 to 7.

9. The cable connector according to claim 8, characterized in that: The cable connector also includes a conductive rod, a wiring terminal and an anti-loosening member, the conductive rod is provided with a first threaded hole, the first connecting thread is located in the first threaded hole and is threadedly connected to the conductive rod, the wiring terminal is provided with a through hole, the connecting bolt is passed through the through hole, the anti-loosening member is provided with a second threaded hole, the second connecting thread is located in the second threaded hole and is threadedly connected to the anti-loosening member.

10. A high voltage switch cabinet, characterized in that: It comprises a cabinet and the cable connector according to claim 8 or 9.

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