A T-type branch connector for high voltage coaxial power cable

Abstract

The present invention discloses a T-type branch connector for a high-voltage coaxial power cable, which is used for simultaneously connecting a single-core cable and a coaxial cable provided with an inner conductor and an outer conductor, and comprises a branch connector main body component, two high-voltage coaxial power cable plug-ins and two high-voltage branch power cable plug-ins. The T-type branch connector for a high-voltage coaxial power cable according to the present invention can realize the connection of two coaxial cables, and realize the connection of a coaxial cable with a single-core cable, so that when connecting two coaxial cables with different cross-sectional areas, two single-core cables with different cross-sectional areas can be connected through two high-voltage branch power cable plug-ins, and the two single-core cables with different cross-sectional areas are respectively connected to the inner conductor and the outer conductor of the coaxial cable to perform current shunting, thereby ensuring the stable flow of current.

Description

Technical Field

[0001] The invention relates to the field of cable accessory products, and in particular to a T-type branch connector for a high-voltage coaxial power cable. Background Art

[0002] With the continuous development of science and technology and the continuous progress of society, the demand for electricity is also increasing. At present, cable power supply is the main power supply method, and power transmission has very high requirements for cables. Stable and reliable cables not only ensure the stability and reliability of power transmission, but also have important significance for the stability of production and life and people's safety. Single-core ordinary cables are the main type of cables at present, but when transmitting large currents, single-core ordinary cables have many problems such as safety and efficiency. Summary of the invention

[0003] 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 T-type branch connector for a high-voltage coaxial power cable.

[0004] A T-type branch connector for a high-voltage coaxial power cable according to an embodiment of the present invention is used for simultaneously connecting a single-core cable and a coaxial cable provided with an inner conductor and an outer conductor, and includes: a branch connector main body component, provided with a first conductive contact seat, a second conductive contact seat, two third conductive contact seats and a connecting cylinder, the connecting cylinder being a cylinder body penetrating the middle and having two bypass holes arranged on the circumference, the open end of the connecting cylinder being used for connecting a cable plug-in head; two high-voltage coaxial power cable plug-ins, respectively plugged into the upper and lower ends of the connecting cylinder, for fixing the two coaxial cables, provided with an inner conductor connecting device and an outer conductor connecting device, the inner conductor connecting device being used for fixing the inner conductor and electrically connecting the inner conductor to the first conductive contact seat, the outer conductor connecting device being used for fixing the outer conductor and electrically connecting the outer conductor to the second conductive contact seat; two high-voltage branch power cable plug-ins, respectively plugged into the two bypass holes of the connecting cylinder, for fixing the two single-core cables and electrically connecting the two single-core cables to the two third conductive contact seats, respectively, the two third conductive contact seats being electrically connected to the inner conductor and the outer conductor, respectively.

[0005] The T-type branch connector for high-voltage coaxial power cable according to the embodiment of the present invention has at least the following technical effects: by providing a connecting cylinder with a bypass hole, a high-voltage coaxial power cable plug-in head is inserted into the upper and lower ends of the connecting cylinder, and a high-voltage branch power cable plug-in head is inserted into the bypass hole, so that the connection between the two coaxial cables is realized, and the connection between the coaxial cable and the single-core cable is realized at the same time, so that when connecting two coaxial cables with different cross-sectional areas, the two single-core cables with different cross-sectional areas can be connected through the two high-voltage branch power cable plug-in heads, and the two single-core cables with different cross-sectional areas are respectively connected to the inner conductor and the outer conductor of the coaxial cable to perform current diversion, thereby ensuring the stable flow of current.

[0006] According to some embodiments of the present invention, the inner conductor connecting device includes an inner conductor connecting hardware, an internal stress cone, an inner conductor stopping device and an internal clamping device, wherein the inner conductor connecting hardware is used to electrically connect the inner conductor to the first conductive contact seat; the internal stress cone is arranged below the inner conductor connecting hardware and is sleeved on the outside of the inner conductor; the inner conductor stopping device is sleeved on the inner conductor between the inner conductor connecting hardware and the internal stress cone, and is used to limit the insertion depth of the inner conductor and prevent the inner conductor from retreating; the internal clamping device is used to pre-tighten the internal stress cone.

[0007] According to some embodiments of the present invention, the outer conductor connecting device includes an outer conductor connecting fitting, an external stress cone, an outer conductor stopping device and an external clamping device; the outer conductor connecting fitting is arranged below the inner conductor connecting device, and is used to electrically connect the outer conductor with the second conductive contact seat; the external stress cone is arranged below the outer conductor connecting fitting and is sleeved on the outside of the outer conductor; the outer conductor stopping device is sleeved on the outer conductor between the outer conductor connecting fitting and the external stress cone, and is used to limit the insertion depth of the outer conductor and prevent the outer conductor from retreating; the external clamping device is used to pre-tighten the external stress cone.

[0008] According to some embodiments of the present invention, the inner holding device is a first spring, and two ends of the first spring respectively abut against the inner stress cone and the outer conductor connecting device.

[0009] According to some embodiments of the present invention, the external support device includes a second spring and a tail pipe, two ends of the second spring respectively abut against the external stress cone and the tail pipe, and the tail pipe is fixed to the branch joint main body assembly.

[0010] According to some embodiments of the present invention, a sealing gasket is provided at the connection between the tail pipe and the branch joint main body assembly.

[0011] According to some embodiments of the present invention, the branch joint body assembly is further provided with an insulating body, and the insulating body is arranged outside the first conductive contact seat, the second conductive contact seat and the connecting cylinder.

[0012] According to some embodiments of the present invention, a metal protective shell is further provided outside the insulating body.

[0013] According to some embodiments of the present invention, a semi-conductive epoxy resin is further provided between the insulating body and the metal protective shell.

[0014] 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

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0016] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0017] Figure 2 It is an enlarged view of part of the structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0018] 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.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying 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 cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "sleeved on", "set on", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] Reference below Figure 1 and Figure 2 A T-type branch connector for a high-voltage coaxial power cable according to an embodiment of the present invention is described.

[0022] like Figure 1 As shown, the T-type branch connector for high-voltage coaxial power cable according to the embodiment of the present invention is used to simultaneously connect a single-core cable 104 and a coaxial cable 103 provided with an inner conductor 101 and an outer conductor 102, and includes a branch connector main body assembly 100, two high-voltage coaxial power cable plugs 200, and a high-voltage branch power cable plug 300. It can be imagined that an inner insulating layer 105 is provided outside the inner conductor 101, and an outer insulating layer 106 is provided outside the outer conductor 102. The inner conductor 101 and the outer conductor 102 are coaxially arranged, and from the axis to the outside, they are the inner conductor 101, the inner insulating layer 105, the outer conductor 102, and the outer insulating layer 106.

[0023] The branch connector main body assembly 100 is provided with a first conductive contact seat 110, a second conductive contact seat 120, two third conductive contact seats 130 and a connecting tube 140. The connecting tube 140 is a cylinder with a central portion and two bypass holes are provided on the peripheral side. The open end of the connecting tube 140 is used to connect a cable plug.

[0024] Two high-voltage coaxial power cable plugs 200 are respectively plugged into the upper and lower ends of the connecting barrel 140, and are used to fix the two coaxial cables 103. An inner conductor connecting device 210 and an outer conductor connecting device 220 are provided. The inner conductor connecting device 210 is used to fix the inner conductor 101 and electrically connect the inner conductor 101 to the first conductive contact seat 110, and the outer conductor connecting device 220 is used to fix the outer conductor 102 and electrically connect the outer conductor 102 to the second conductive contact seat 120. It can be imagined that the first conductive contact seat 110 is cylindrical and is arranged in the connecting barrel 140, and is used to connect the inner conductors 101 of the two coaxial cables 103; the second conductive contact seat 120 is divided into upper and lower parts, and the connecting barrel 140 is located between the upper and lower parts of the second conductive contact seat 120 and electrically connects the two parts of the second conductive contact seat 120, thereby connecting the outer conductors 102 of the two coaxial cables 103.

[0025] The two high-voltage branch power cable plug heads 300 are respectively inserted into the two bypass holes of the connecting tube 140, and are used to fix the two single-core cables 104 and electrically connect the two single-core cables 104 to the two third conductive contact seats 130, respectively. The two third conductive contact seats 130 are electrically connected to the inner conductor 101 and the outer conductor 102, respectively. When connecting two coaxial cables with different cross-sectional areas, the two single-core cables with different cross-sectional areas can be connected through the two high-voltage branch power cable plug heads 300, and the two single-core cables with different cross-sectional areas are respectively connected to the inner conductor and outer conductor of the coaxial cable for current diversion, thereby ensuring the stable flow of current.

[0026] In some embodiments of the present invention, the inner conductor connecting device 210 includes an inner conductor connecting hardware 211, an internal stress cone 212, an inner conductor stopping device 213 and an inner clamping device 214. The inner conductor connecting hardware 211 is used to electrically connect the inner conductor 101 to the first conductive contact seat 110; the internal stress cone 212 is arranged below the inner conductor connecting hardware 211 and is sleeved on the outside of the inner conductor 101; the inner conductor stopping device 213 is sleeved on the inner conductor 101 between the inner conductor connecting hardware 211 and the internal stress cone 212, and is used to limit the insertion depth of the inner conductor 101 and prevent the inner conductor 101 from retreating; the inner clamping device 214 is used to pre-tighten the internal stress cone 212.

[0027] In some embodiments of the present invention, the outer conductor connecting device 220 includes an outer conductor connecting hardware 221, an external stress cone 222, an outer conductor stopping device 223 and an external clamping device 224. The outer conductor connecting hardware 221 is arranged below the inner conductor connecting device 210, and is used to electrically connect the outer conductor 102 to the second conductive contact seat 120; the external stress cone 222 is arranged below the outer conductor connecting hardware 221 and is sleeved on the outside of the outer conductor 102; the outer conductor stopping device 223 is sleeved on the outer conductor 102 between the outer conductor connecting hardware 221 and the external stress cone 222, and is used to limit the insertion depth of the outer conductor 102 and prevent the outer conductor 102 from retreating; the external clamping device 224 is used to pre-tighten the external stress cone 222.

[0028] It is conceivable that the inner conductor connecting fitting 200 is provided with a conductive sheet connected to the first conductive contact seat 110 , and the outer conductor connecting fitting 221 is provided with a conductive sheet connected to the second conductive contact seat 120 .

[0029] It can be imagined that both the inner stress cone 212 and the outer stress cone 222 are sleeves with an outer conical surface, which can effectively improve the electric field distribution at the cable break through the geometric electric stress control method. This is a conventional technology. For example, the patent with the publication number "CN207442419U" for a cable intermediate joint for rapid repair introduces the relevant structure of the stress cone. Figure 2 As shown, the internal stress cone 212 and the external stress cone 222 are in a cone-shaped fit with the insulating body 150 .

[0030] It can be imagined that the structural principle of the high-voltage branch power cable plug 300 used to fix the single-core cable 104 is common knowledge. For example, the patent with publication number "CN207442419U" mentioned above, which is a cable intermediate joint for rapid repair, describes the relevant structure.

[0031] In some embodiments of the present invention, Figure 2 As shown, the inner conductor stopper 213 and the outer conductor stopper 223 are both annular, the first conductive contact seat 110 and the second conductive contact seat 120 are respectively located above the inner conductor stopper 213 and above the outer conductor stopper 223, and are respectively provided with an inner hole 111 and an outer hole 121, the inner conductor 101 supports the inner conductor stopper 213, and the outer diameter of the inner conductor stopper 213 is larger than the inner diameter of the inner hole 111, so the inner conductor stopper 213 cannot be inserted The inner conductor 101 is inserted into the inner hole 111, and the inner conductor 101 abuts against the inner conductor stopper 213 and cannot go deeper, thereby preventing the inner conductor 101 from being inserted too deeply; the outer stress cone 222 supports the outer conductor stopper 223, and the outer diameter of the outer conductor stopper 223 is larger than the inner diameter of the outer hole 121, so the outer conductor stopper 223 cannot be inserted into the outer hole 121, and the outer conductor 102 abuts against the outer conductor stopper 223 and cannot go deeper, thereby preventing the outer conductor 102 from being inserted too deeply. It can be imagined that the inner conductor stopper 213 and the outer conductor stopper 223 are supported by the inner insulating layer 105 and the outer insulating layer 106, respectively.

[0032] In some embodiments of the present invention, Figure 2 As shown, the inner conductor stopper 213 and the outer conductor stopper 223 are both annular, the inner stress cone 212 and the outer stress cone 222 support the inner conductor stopper 213 and the outer conductor stopper 223 respectively, the outer diameter of the inner conductor connection fitting 211 is larger than the inner diameter of the inner conductor stopper 213, and the outer diameter of the outer conductor connection fitting 221 is larger than the inner diameter of the outer conductor stopper 223, so the inner conductor connection fitting 211 cannot pass through the inner conductor stopper 213, and the outer conductor connection fitting 221 cannot pass through the outer conductor stopper 223, and the inner stress cone 212 and the outer stress cone 222 are respectively supported upward by the inner holding device 214 and the outer holding device 224, that is, effectively preventing the inner conductor 101 and the outer conductor 102 from falling out. In addition, as mentioned above, the patent with the publication number "CN207442419U" for a cable intermediate joint for rapid emergency repair also describes the relevant structure of the stopper.

[0033] In some embodiments of the present invention, Figure 2As shown, the internal clamping device 214 is a first spring, and the two ends of the first spring respectively abut against the internal stress cone 212 and the outer conductor connecting device 220, so as to squeeze the internal stress cone 212 to ensure that the pressure of the internal stress cone 212 is constant when the internal stress cone 212 ages, thereby preventing the internal stress cone 212 from loosening and affecting the performance.

[0034] In some embodiments of the present invention, the external tightening device 224 includes a second spring 225 and a tail pipe 226, and the two ends of the second spring 225 respectively abut the external stress cone 222 and the tail pipe 226, so as to squeeze the external stress cone 222 to ensure that the pressure of the external stress cone 222 is constant when the external stress cone 222 ages, thereby preventing the external stress cone 222 from loosening and affecting the performance; the tail pipe 226 is fixed on the branch joint main body assembly 100 to achieve sealing, dustproof and waterproof functions. It can be imagined that the tail pipe 226 can be fixedly connected to the branch joint main body assembly 100 by bolts.

[0035] In some embodiments of the present invention, a sealing gasket is provided at the connection between the tail pipe 226 and the branch joint main assembly 100 to ensure the sealing and dustproof and waterproof effects of the tail pipe 226 .

[0036] In some embodiments of the present invention, the inner conductor connecting fitting 211 and the outer conductor connecting fitting 221 are both connected to the connecting tube 140 in a mechanical crimp-free connection form to facilitate quick plugging and unplugging, which is simple and practical.

[0037] In some embodiments of the present invention, Figure 2 As shown, the branch joint main body assembly 100 is further provided with an insulating body 150, and the insulating body 150 is arranged outside the first conductive contact seat 110, the second conductive contact seat 120 and the connecting tube 150. It can be imagined that the insulating body 150 is formed by vacuum casting with epoxy resin material, and is cast into a whole with the first conductive contact seat 110, the second conductive contact seat 120 and the connecting tube 150, which is stable and reliable.

[0038] In some embodiments of the present invention, Figure 2 As shown, a metal protective shell 160 is further provided outside the insulating body 150 to achieve sealed mechanical protection for the internal components.

[0039] In some embodiments of the present invention, Figure 2 As shown, a semi-conductive epoxy resin 170 is further provided between the insulating body 150 and the metal protective shell 160 to eliminate the air gap between the metal protective shell 160 and the insulating body 150, thereby achieving a good electrical shielding effect.

[0040] In the description of this specification, the description with reference to the terms "example", "embodiment" or "some embodiments" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0041] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A T-shaped branch connector for a high-voltage coaxial power cable, used for simultaneously connecting a single-core cable (104) and a coaxial cable (103) having an inner conductor (101) and an outer conductor (102), characterized in that: include: A branch connector main body component (100) is provided with a first conductive contact seat (110), a second conductive contact seat (120), two third conductive contact seats (130) and a connecting tube (140). The connecting tube (140) is a cylinder body with a central portion penetrating therethrough and two bypass holes are provided on the circumference. The open end of the connecting tube (140) is used for connecting a cable plug-in connector. Two high-voltage coaxial power cable plugs (200) are respectively plugged into the upper and lower ends of the connecting tube (140) and used to fix the two coaxial cables (103). An inner conductor connecting device (210) and an outer conductor connecting device (220) are provided. The inner conductor connecting device (210) is used to fix the inner conductor (101) and electrically connect the inner conductor (101) to the first conductive contact seat (110). The outer conductor connecting device (220) is used to fix the outer conductor (102) and electrically connect the outer conductor (102) to the second conductive contact seat (120). Two high-voltage branch power cable plug-in heads (300) are respectively plugged into the two bypass holes of the connecting tube (140), and are used to fix the two single-core cables (104) and electrically connect the two single-core cables (104) to the two third conductive contact seats (130), respectively; and the two third conductive contact seats (130) are electrically connected to the inner conductor (101) and the outer conductor (102), respectively; The inner conductor connecting device (210) comprises an inner conductor connecting fitting (211), an inner stress cone (212), an inner conductor stopping device (213) and an inner clamping device (214); the inner conductor connecting fitting (211) is used to electrically connect the inner conductor (101) to the first conductive contact seat (110); the inner stress cone (212) is arranged below the inner conductor connecting fitting (211) and sleeved on the outside of the inner conductor (101); the inner conductor stopping device (213) is sleeved on the inner conductor (101) between the inner conductor connecting fitting (211) and the inner stress cone (212) and is used to limit the insertion depth of the inner conductor (101) and prevent the inner conductor (101) from retreating; the inner clamping device (214) is used to pre-tighten the inner stress cone (212).

2. The T-type branch connector for high-voltage coaxial power cable according to claim 1, characterized in that: The outer conductor connecting device (220) comprises an outer conductor connecting fitting (221), an outer stress cone (222), an outer conductor stopping device (223) and an outer clamping device (224); the outer conductor connecting fitting (221) is arranged below the inner conductor connecting device (210) and is used to electrically connect the outer conductor (102) to the second conductive contact seat (120); the outer stress cone (222) is arranged below the outer conductor connecting fitting (221) and is sleeved on the outside of the outer conductor (102); the outer conductor stopping device (223) is sleeved on the outer conductor (102) between the outer conductor connecting fitting (221) and the outer stress cone (222) and is used to limit the insertion depth of the outer conductor (102) and prevent the outer conductor (102) from retreating; the outer clamping device (224) is used to pre-tighten the outer stress cone (222).

3. The T-type branch connector for high-voltage coaxial power cable according to claim 1, characterized in that: The inner holding device (214) is a first spring, and two ends of the first spring respectively abut against the inner stress cone (212) and the outer conductor connecting device (220).

4. The T-type branch connector for high-voltage coaxial power cable according to claim 2, characterized in that: The external support device (224) comprises a second spring (225) and a tail pipe (226); two ends of the second spring (225) respectively abut against the external stress cone (222) and the tail pipe (226); and the tail pipe (226) is fixed on the branch joint main body assembly (100).

5. The T-type branch connector for high-voltage coaxial power cable according to claim 4, characterized in that: The tail pipe (226) is provided with a sealing gasket at the connection with the branch joint main body assembly (100).

6. The T-type branch connector for high-voltage coaxial power cable according to claim 1, characterized in that: The branch joint main body assembly (100) is also provided with an insulating body (150), and the insulating body (150) is arranged outside the first conductive contact seat (110), the second conductive contact seat (120) and the connecting cylinder (140).

7. The T-type branch connector for high-voltage coaxial power cable according to claim 6, characterized in that: A metal protective shell (160) is also provided outside the insulating body (150).

8. The T-type branch connector for high-voltage coaxial power cable according to claim 7, characterized in that: A semi-conductive epoxy resin (170) is also provided between the insulating body (150) and the metal protective shell (160).

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