Cable butt joint method

Abstract

The invention discloses a butt joint method of a cable, and the method comprises the steps: enabling a connector body to be configured to be an I-shaped structure in a combined connection process of the connector body and an inner cone terminal carrying the cable, enabling the inner cone terminals at the two ends of the connector body to achieve the waterproof isolation, and preventing the water from entering the inner cone terminal at the other end from being affected after the water enters the inner cone terminal at one end. The inner cone terminal carrying the cable at the position is damaged due to water inflow and causes loss, only the damaged inner cone terminal needs to be replaced while maintenance is carried out, and in the replacement mode, due to the fact that the connector body has the effect of communicating the two cables in the application process, only the cable needs to be replaced when the inner cone terminal is not damaged, replacement can be completed, cost is saved, and the replacement efficiency is improved. In addition, in the cable butt joint method of the scheme, waterproof sealing is carried out on the connecting gap between the connector body and the inner cone terminal, and the waterproof effect is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of cables, and in particular to a method for connecting cables. Background Art

[0002] In power and electrified railway systems, cables are often connected by intermediate joints, which have many years of operating experience, are widely used, and have relatively low costs. However, statistics on power accidents show that most cable accidents occur on cable accessories, especially intermediate joints.

[0003] In the prior art, intermediate joints are generally used to connect cables with the same or similar cross-sections. Intermediate joint products cannot solve the problem of large cable cross-section spans. Moreover, once an intermediate joint product has an accident, the joint needs to be sawed off, resulting in insufficient cable length and inability to restore the line. The most common solution is to add a section of cable and make a set of joints to achieve line connection, which invisibly increases costs and increases safety hazards. In addition, the huge amount of work makes it impossible to quickly repair and restore the line.

[0004] Based on the above problems, after adopting the intermediate joint product, the waterproof problem is especially designed. The publication number in China is CN11541195A: A cable docking process, which uses a connecting nut to dock the core wires, and wraps them with conductive tape, and then wraps them with heat shrink tubing and metal shielding net. This docking process cannot effectively waterproof and has poor watertightness; the publication number is CN109245022A: A cable wrapping intermediate joint and its manufacturing process, which uses a binding layer, a cable metal shielding tape, a cable waterproof layer, and a cable armor layer for manufacturing. The process is relatively complicated and the watertightness is poor; and the above schemes cannot prevent water from entering the other side of the cable.

[0005] Therefore, for the above problems, continue with the solution. Summary of the invention

[0006] The object of the present invention is to provide a method for connecting cables, which realizes the functions of rapid installation and disassembly by adopting an embedded detachable structure between the inner cone terminal and the connector body, and at the same time, an intermediate partition is applied in the connector body to block the insulation damage caused by water ingress into the cable, so as to facilitate the disassembly and replacement of the cable on the damaged side.

[0007] In order to achieve the above object, the technical solutions of the present invention are:

[0008] A method for connecting cables, comprising:

[0009] Step S1, providing two cables to be connected and a connector body with an I-shaped cross section, one end of the two cables to be connected respectively has an inner cone terminal, and the inner cone terminal carrying the cable is connected to the connector body by inserting one end of the connector;

[0010] Step S2, positioning grooves and through grooves connected to the positioning grooves are constructed at both ends of the connector body, and elastically retractable positioning pins are constructed on the inner cone terminal. During the insertion of the inner cone terminal carrying the cable, the positioning pins constructed on the inner cone terminal are aligned with the through grooves and contracted until they enter the positioning grooves and reset and extend out, and then the inner cone terminal is rotated to dislocate the positioning pins and the through grooves, so that the inner cone terminal and the connector body are combined and positioned;

[0011] Step S3: constructing first sealing grooves at both ends of the joint body, and filling the first sealing grooves with first sealing rings to form a first water blocking process.

[0012] Furthermore, in step S1, the connector body is composed of a metal conductor, a silicone rubber shielding sleeve, a silicone rubber insulating sleeve, a rubber insulating part and a metal shell, the metal conductor is covered with a silicone rubber shielding sleeve, the silicone rubber shielding sleeve is covered with a silicone rubber insulating sleeve, the silicone rubber shielding sleeve is covered with a silicone rubber insulating sleeve, the silicone rubber insulating sleeve is covered with a rubber insulating part, and the rubber insulating part is covered with a metal shell.

[0013] Furthermore, the metal conductor has a docking cavity and a metal partition inside the metal conductor;

[0014] The docking cavity is evenly divided by the metal partition to form a left docking cavity and a right docking cavity, and the left docking cavity and the right docking cavity are used for installation with the corresponding inner cone terminal.

[0015] Furthermore, the outer surface of the metal conductor is frosted.

[0016] Furthermore, in step S1:

[0017] Metal flanges are arranged at both ends of the joint body, and the metal flanges are used to locally position the inner cone terminal.

[0018] Furthermore, in step S1:

[0019] The inner cone terminal has a cable insulation sleeve and a contact ring. The contact ring is arranged above the cable insulation sleeve, and a screw hole for installing the positioning pin is opened on the outer periphery of the contact ring.

[0020] Furthermore, in step S1:

[0021] After the inner cone terminal and the joint body are assembled and docked, a load-bearing ring installed on the cable insulation sleeve is used. The load-bearing ring abuts against the two ends of the joint body after installation.

[0022] Furthermore, after step S3, step S4 is also included:

[0023] A second sealing groove is provided in the bearing ring. After the bearing ring is installed on the cable insulation sleeve, a second sealing ring is formed between the bearing ring and the cable insulation sleeve. A second sealing ring is filled in the second sealing ring to form a second water blocking process.

[0024] The beneficial effect of the present invention is that, in the process of combined connection between the connector body and the inner cone terminal carrying the cable, by configuring the connector body into an "I"-shaped structure, the inner cone terminals at both ends of the connector body are waterproofed, and after water enters the inner cone terminal at one end, it is avoided that the inner cone terminal at the other end is affected by water ingress, thereby preventing the inner cone terminal carrying the cable at that place from being damaged by water ingress and causing losses. During maintenance, only the damaged inner cone terminal needs to be replaced, and in terms of replacement method, since the connector body has the function of connecting the two cables during application, when the inner cone terminal is not damaged, only the cable needs to be replaced to complete the replacement, thereby saving costs. In addition, in the cable docking method of the present scheme, the connection gap between the connector body and the inner cone terminal is waterproofly sealed to further improve the waterproof effect.

[0025] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a flowchart of the steps of a cable docking method in this embodiment;

[0027] Figure 2 is a flowchart of the steps of a cable docking method in this embodiment;

[0028] Figure 3 is a schematic diagram of the structure of cables being butted together after a method for butting together cables in this embodiment is applied;

[0029] Figure 4 It is a structural schematic diagram of an indicating connector body when the cables are butted together after a method for butting together the cables in this embodiment is applied;

[0030] Figure 5 It is a structural schematic diagram indicating the inner cone terminal during cable docking after the application of a cable docking method in this embodiment. DETAILED DESCRIPTION

[0031] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0032] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0033] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0034] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0035] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0036] As a preferred embodiment of the present application, Figure 1 to Figure 2 As shown, a method for connecting cables is provided, comprising:

[0037] Step S1, providing two cables to be connected and a connector body 1 with an I-shaped cross section, one end of the two cables to be connected respectively has an inner cone terminal 2, and the inner cone terminal 2 carrying the cable is connected to the connector body 1 by inserting one end of the connector;

[0038] First, combine Figure 3 and Figure 4As shown, the connector body 1 is composed of a metal conductor 11, a silicone rubber shielding sleeve 12, a silicone rubber insulating sleeve 13, a rubber insulating part 13, a semi-conductive outer skin 14 and a metal shell 15. The metal conductor 11 is covered with the silicone rubber shielding sleeve 12, the silicone rubber shielding sleeve 12 is covered with the silicone rubber insulating sleeve 13, the silicone rubber shielding sleeve 12 is covered with the silicone rubber insulating sleeve 13, the silicone rubber insulating sleeve 13 is covered with the rubber insulating part 13, the rubber insulating part 13 is covered with the semi-conductive outer skin 14, and the semi-conductive outer skin 14 is covered with the metal shell 15.

[0039] In application, the metal conductor 11 is bonded to the silicone rubber shielding sleeve 12 as a whole, and the size and shape design of the silicone rubber shielding sleeve 12 provide a high voltage shielding function; the semi-conductive outer skin 14 achieves a grounding shielding function. The silicone rubber insulating member 13 is made of high-hardness insulating silicone rubber material, and the hardness of the high-hardness material is close to that of epoxy, which can make the relative resistance of the connector body 1 and the inner cone terminal 2 silicone rubber assembly smaller, more convenient and quicker; and the material has excellent electrical properties, anti-electrical tracking performance, corrosion resistance, and good waterproof performance. In addition, the metal shell 15 is put on the outside of the combined prefabricated connector body 1 when in use, and the two are interference fit. The metal shell 15 can provide sufficient clamping force, thereby increasing the interface pressure of the connector body 1 to achieve better waterproof capability.

[0040] The surface of the metal conductor 11 is frosted to increase the adsorption and adhesion ability with the semi-conductive outer skin 14. The additional role of the metal conductor 11 is to give the joint body 1 a combined structural stability and other functional effects. Specifically, a silicone rubber shielding layer is cast on the surface of the semi-conductive outer skin 14. The presence of the semi-conductive outer skin 14 can effectively solve the problem of cracking caused by the loose adhesion between the metal conductor 11 and the semi-conductive outer skin 14. The two ends of the silicone rubber shielding layer are not designed to be rounded and are raised a certain distance, thereby effectively solving the sudden change of field intensity and improving the electric field distribution. In addition, the presence of the semi-conductive outer skin 14 and the silicone rubber shielding layer structure on the metal surface can improve the electric field, inhibit the growth of tree branches, and act as a thermal barrier. That is, when the metal temperature rises, the semi-conductive shielding layer will play a temperature distribution role due to its own thermal resistance, preventing the insulation layer from suddenly rising in temperature and causing insulation breakdown.

[0041] The metal conductor 11 has a docking cavity 10 therein and a metal partition 100 therein. The metal partition 10 is used to divide the docking cavity 10 into a left docking cavity 10 and a right docking cavity 10. The left docking cavity 10 and the right docking cavity 10 are used to be installed with the corresponding inner cone terminal 2, which can effectively cut off the water from entering the opposite side cable.

[0042] Metal flanges are arranged at both ends of the joint body 1. The metal flanges are annular and adapted to the shape of the joint body 1. The metal flanges are used for locally positioning the inner cone terminal 2.

[0043] Secondly, as shown in Figure 5 The inner cone terminal 2 has a cable insulating sleeve 21 and a contact ring 22. The contact ring 22 is arranged above the cable insulating sleeve 21, and a screw hole for installing the positioning pin 23 is provided on the outer periphery of the contact ring 22. After the combination and docking between the inner cone terminal 2 and the joint body 1 are completed, a bearing ring 24 installed on the cable insulating sleeve 21 abuts against both ends of the joint body 1 after installation.

[0044] The inside of the bearing ring 24 is designed into a stepped structure, which cooperates with the step of the inner cone terminal 2. After the cable insulation is cut and becomes smaller, it passes through the inner hole of the bearing ring 24. The bearing ring 24 is used to externally seal the gap between the inner cone terminal 2 and the joint body 1 to prevent water from entering the joint body 1.

[0045] In addition, the contact ring is a cylindrical structure with a variable diameter. The position with a smaller diameter on the contact ring is used for the circumferential pressure of the cable core to achieve current transmission; the position with a larger diameter on the contact ring is used for grooving to install a spring watch chain to realize the connection between the cable conductor and the metal conductor of the combined prefabricated joint, and the positioning pin is installed at the position with a larger diameter on the contact ring.

[0046] In the application of this embodiment, the upper end of the contact ring has a larger diameter, and the lower end of the contact ring has a smaller diameter. The lower end of the contact ring is used to realize the connection with the cable insulating sleeve, and a waterproof sealant structure 26 in the shape of "丄" is wrapped around the gap between the cable insulating sleeve and the contact ring at this position.

[0047] Step S2: A positioning groove 31 and a through groove 32 communicating with the positioning groove 31 are configured at both ends of the joint body 1, and an elastically telescopic positioning pin 23 is configured on the inner cone terminal 2. During the insertion of the inner cone terminal 2 carrying the cable, the positioning pin 23 configured on the inner cone terminal 2 is aligned with the through groove 32 and contracts until it enters the positioning groove 31 and resets and extends. Then, the inner cone terminal 2 is rotated to make the positioning pin 23 and the through groove 32 misaligned, so as to realize the combined positioning between the inner cone terminal 2 and the joint body 1.

[0048] Specifically, as shown in Figure 4 A positioning groove 31 is machined in the metal conductor 11. The positioning groove 31 is used to cooperate with the spring positioning pin 23 of the inner cone terminal 2 to effectively position the cable, so as to avoid insulation creepage and insulation breakdown problems caused by the cable moving backward; a through groove 32 is machined on the side of the positioning groove 31, and the positioning pin 23 can be withdrawn from the through groove 32 by adjusting the angle of installing the cable, so as to realize the repeated plugging and unplugging of the cable.

[0049] Step S3: Provide first sealing grooves 111 at both ends of the joint body 1, and fill the first sealing grooves 111 with first sealing rings to form the first water-blocking process.

[0050] As can be summarized from the above, the docking cavity 10 inside the joint body 1 is an insulating inner cavity. After the first sealing grooves 111 are provided, a first sealing ring is formed between the inner cone terminal 2 and the joint body 1 through the first sealing grooves 111. The first sealing ring is filled with a first sealing ring to realize the first water-blocking process. The first water-blocking process is used to prevent water from entering the insulating inner cavity through the circumferential side of the inner cone terminal 2.

[0051] Step S4: Provide second sealing grooves 25 in the bearing ring 24. After the bearing ring 24 is installed on the cable insulating sleeve 21, a second sealing ring is formed between the bearing ring 24 and the cable insulating sleeve 21, and a second sealing ring is filled in the second sealing ring to form the second water-blocking process.

[0052] Combined Figure 5 As shown, second sealing grooves 25 are provided in the inner hole of the bearing ring 24 to install second sealing rings, which are matched with the insulating dimensions after the cable is cut to realize a sealing structure, so as to prevent the water entering the cable core from spreading to the insulating inner cavity, and form the second water-blocking process.

[0053] Based on the setting process in step S1, the lower end of the contact ring is used to realize the connection with the cable insulating sleeve, and a waterproof sealing glue structure in the shape of "丄" is wrapped around the gap between the cable insulating sleeve and the contact ring at this position. Combined with the second water-blocking process realized by the second sealing grooves and second sealing rings on the bearing ring, the waterproof sealing of the inner cone terminal itself is realized. That is, when water enters the cable core, it will be sealed by this structure and will not spread to the inner cone terminal and the combined prefabricated joint.

[0054] Based on the waterproof application in the above cable connection method, by applying a joint body in the shape of "工", a waterproof barrier is provided when two inner cone terminals carrying cables are connected. Waterproofing between the inner cone terminal and the joint body is obtained through the first sealing grooves. By providing second sealing grooves in the bearing ring of the inner cone terminal and filling waterproof sealing glue between the contact ring and the cable insulating part, a comprehensive waterproof application is realized.

[0055] In actual applications, the cable has a process of alternating hot and cold during operation. The cable connection structure is equivalent to a water pump system. During the process of cooling and contracting after heating and expansion, external moisture will enter the docking cavity through the gap of the inner cone terminal or the gap between the inner cone terminal and the connector body, and then diffuse to each cable to damage the product. The "I"-shaped connector body used in the present invention divides the water supply pump system into two relatively independent ones. The inner cone terminals connected at both ends of the connector body independently guide their respective water pump systems without affecting each other. Under the condition that the inner cone terminal itself has good waterproof conditions, it will not interfere with their respective applications.

[0056] The beneficial effect of the present invention is that, in the process of combined connection between the connector body and the inner cone terminal carrying the cable, by configuring the connector body into an "I"-shaped structure, the inner cone terminals at both ends of the connector body are waterproofed, and after water enters the inner cone terminal at one end, it is avoided that the inner cone terminal at the other end is affected by water ingress, thereby preventing the inner cone terminal carrying the cable at that place from being damaged by water ingress and causing losses. During maintenance, only the damaged inner cone terminal needs to be replaced, and in terms of replacement method, since the connector body has the function of connecting the two cables during application, when the inner cone terminal is not damaged, only the cable needs to be replaced to complete the replacement, thereby saving costs. In addition, in the cable docking method of the present scheme, the connection gap between the connector body and the inner cone terminal is waterproofly sealed to further improve the waterproof effect.

[0057] According to the disclosure and teaching of the above description, those skilled in the art to which the present invention belongs may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the present invention.

Claims

1. A method for connecting cables, characterized in that: include: Step S1, providing two cables to be connected and a connector body with an "I"-shaped cross section, one end of the two cables to be connected respectively has an inner cone terminal, and the inner cone terminal carrying the cable is connected to the connector body by inserting one end of the connector; Step S2, positioning grooves and through grooves connected to the positioning grooves are constructed at both ends of the connector body, and elastically retractable positioning pins are constructed on the inner cone terminal. During the insertion of the inner cone terminal carrying the cable, the positioning pins constructed on the inner cone terminal are aligned with the through grooves and contracted until they enter the positioning grooves and reset and extend out, and then the inner cone terminal is rotated to dislocate the positioning pins and the through grooves, so that the inner cone terminal and the connector body are combined and positioned; Step S3: constructing first sealing grooves at both ends of the joint body, and filling the first sealing grooves with first sealing rings to form a first water blocking process.

2. The cable docking method according to claim 1, characterized in that: In step S1, the connector body is composed of a metal conductor, a silicone rubber shielding sleeve, a silicone rubber insulating sleeve, a rubber insulating part and a metal shell. The metal conductor is covered with a silicone rubber shielding sleeve, the silicone rubber shielding sleeve is covered with a silicone rubber insulating sleeve, the silicone rubber shielding sleeve is covered with a silicone rubber insulating sleeve, the silicone rubber insulating sleeve is covered with a rubber insulating part, and the rubber insulating part is covered with a metal shell.

3. The cable docking method according to claim 2, characterized in that: The metal conductor has a docking cavity therein and a metal partition therein; The docking cavity is evenly divided by the metal partition to form a left docking cavity and a right docking cavity, and the left docking cavity and the right docking cavity are used for installation with the corresponding inner cone terminal.

4. The cable docking method according to claim 2, characterized in that: The outer surface of the metal conductor is frosted.

5. The cable docking method according to claim 1, characterized in that: In step S1: Metal flanges are arranged at both ends of the joint body, and the metal flanges are used to locally position the inner cone terminal.

6. The cable docking method according to claim 1, characterized in that , in step S1: The inner cone terminal has a cable insulation sleeve and a contact ring. The contact ring is arranged above the cable insulation sleeve, and a screw hole for installing the positioning pin is opened on the outer periphery of the contact ring.

7. The cable docking structure according to claim 6, characterized in that: In step S1: After the inner cone terminal and the joint body are assembled and docked, a load-bearing ring installed on the cable insulation sleeve is used. The load-bearing ring abuts against the two ends of the joint body after installation.

8. The cable docking method according to claim 7, characterized in that: After step S3, the method further includes step S4: A second sealing groove is provided in the bearing ring. After the bearing ring is installed on the cable insulation sleeve, a second sealing ring is formed between the bearing ring and the cable insulation sleeve. A second sealing ring is filled in the second sealing ring to form a second water blocking process.

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