Cable joint with multi-functional grounding mode and grounding method of cable joint

Abstract

This invention discloses a cable connector with multiple grounding methods and a grounding method for the cable connector. The cable connector includes a prefabricated rubber component, a terminal block, and a protective shell. The prefabricated rubber component is sleeved on the outside of the insulation layer of two main cables, with both ends overlapping the outer shielding layer of the two main cables. The terminal block is connected to the grounding cable and the aluminum / copper wire shielding layers of the two main cables, respectively. The protective shell is sleeved on the outside of the terminal block and the prefabricated rubber component. The end of the protective shell has a main opening for the main cable to extend and a grounding opening for the grounding cable to extend. A waterproof sealant layer fills the inside of the protective shell. The cable connector with multiple grounding methods and the grounding method of this invention connect the grounding cable and the aluminum / copper wire shielding of the main cables through the terminal block. For different grounding cables, the connection can be changed only by changing the connection between the terminal blocks, which is flexible and versatile, and the installation process is simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of cable joint technology, and in particular to a cable joint with a multi-functional grounding method and a grounding method for the cable joint. Background Technology

[0002] The grounding connection of cable joints is a crucial component of the cable grounding system. Poor grounding or incorrect grounding methods can induce voltage in the shielding layer, causing it to overheat, resulting in significant energy loss and disrupting normal line operation. Furthermore, when the cable experiences a short circuit, lightning strike, or operational overvoltage, a very high induced voltage can form on the shielding, endangering personal safety and potentially even puncturing the cable sheath.

[0003] Currently, the grounding connection of the intermediate joint is achieved by connecting the metal shell to the grounding wire and the cable's metal shield, respectively. Different metal shell structures are required for different grounding cables (coaxial and single-core grounding cables). This grounding method has the following problems: 1) Changing the grounding method on-site is difficult, requiring replacement of the metal copper shell according to the specific grounding cable, increasing the construction period. 2) The connection between the metal shield and the copper shell uses lead sealing, making the grounding connection cumbersome; the quality of the lead sealing is closely related to the operator's skill. 3) The sealing performance between the copper / aluminum wire shielded cable and the metal shell is poor. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned shortcomings. This invention provides a cable connector with a multi-functional grounding method and a grounding method for the cable connector. The grounding cable and the aluminum / copper wire shield of the main cable are connected through a terminal block. For different grounding cables, the grounding can be achieved simply by changing the connection between the terminals. The installation process is simple and convenient.

[0005] The present invention provides a cable connector with a multi-functional grounding method, comprising a prefabricated rubber component, a terminal block, and a protective shell. The prefabricated rubber component is sleeved on the outside of the insulation layer of two main cables and overlaps the outer shielding layer of the two main cables at both ends. The terminal block is connected to the grounding cable and the aluminum / copper wire shielding layer of the two main cables respectively. The protective shell is sleeved on the outside of the terminal block and the prefabricated rubber component. The end of the protective shell has a main opening for the main cable to extend and a grounding opening for the grounding cable to extend. A waterproof sealant layer is filled inside the protective shell.

[0006] Furthermore, the grounding cable is a single-core grounding cable, with the terminal section connected to the conductor of the grounding cable and the aluminum / copper wire shielding layers of the two main cables, respectively.

[0007] Furthermore, the grounding cable is a coaxial grounding cable, and the terminal section has two terminal units. The two ends of one terminal unit are respectively connected to the aluminum / copper wire shielding layer of a main cable and the outer conductor of the grounding cable, and the two ends of the other terminal unit are respectively connected to the aluminum / copper wire shielding layer of another main cable and the inner conductor of the grounding cable.

[0008] Furthermore, it also includes a waterproof sealant layer that fills the inner cavity of the protective shell.

[0009] Furthermore, the protective shell is provided with a sealant filling port communicating with the inner cavity of the protective shell, an end cap covering the sealant filling port, and a sealing strip layer wrapped around the outside of the sealant filling port and the end cap.

[0010] Furthermore, the sealing tape layer is a PVC tape sealing layer.

[0011] Furthermore, the protective shell includes two opposing semi-shells, which are fixedly connected by bolts.

[0012] Furthermore, the protective shell is made of fiberglass.

[0013] Furthermore, it also includes a grounding waterproof sealant layer, which is wrapped around the outer wall of the grounding opening and the outside of the grounding cable.

[0014] Furthermore, it also includes a main waterproof sealant layer, which wraps around the outer wall of the main opening and the outer side of the main cable.

[0015] According to another aspect of the present invention, a grounding method for a cable joint is also provided. The main cable includes, from the inside out, a conductor core, an insulation layer, an outer shielding layer, an aluminum / copper wire shielding layer, and an outer sheath, comprising the following steps: Step 1, stripping the ends of the two main cables, sequentially stripping the outer sheath, aluminum / copper wire shielding layer, outer shielding layer, and insulation layer of the main cable ends to corresponding predetermined distances; Step 2, fitting a connecting tube onto the conductor cores of the two main cable ends, and fitting a pre-made rubber component onto the outside of the connecting tube, with both ends of the pre-made rubber component overlapping the outer shielding layer of the two main cable ends; Step 3, grounding the aluminum / copper wire shielding layer of the two main cable ends... The aluminum / copper wire shielding layer is connected to the grounding cable through a terminal block. When the grounding cable is a coaxial grounding cable, the outer sheath, outer conductor, and insulation layer at the end of the coaxial grounding cable are stripped in sequence. The aluminum / copper wire shielding layer at the end of one main cable is connected to the outer conductor of the coaxial grounding cable through a terminal block, and the aluminum / copper wire shielding layer at the end of the other main cable is connected to the inner conductor of the coaxial grounding cable through a terminal block. When the grounding cable is a single-core grounding cable, the outer sheath and insulation layer of the single-core grounding cable are stripped in sequence, and the aluminum / copper wire shielding layers at the ends of the two main cables are connected to the conductor of the single-core grounding cable through terminals respectively.

[0016] The beneficial effects of this invention are as follows: Compared with existing methods, the cable connector of this invention with a multi-functional grounding method does not require a metal copper shell and lead sealing process. The aluminum / copper wire shield of the grounding cable and the main cable are connected through the terminal block. For different grounding cables, it can be achieved by simply changing the connection between the terminal blocks, which is flexible and versatile, and the installation process is simple and convenient. Waterproof sealing is achieved through waterproof sealant and fiberglass shell, resulting in a good sealing effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a cable connector with a multi-functional grounding method in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of a cable connector with a multi-functional grounding method in another embodiment of the present invention.

[0019] In the diagram: 1. Coaxial grounding cable; 2. Fiberglass shell; 3. Terminal block; 4. Waterproof sealant layer; 5. Aluminum / copper wire shielding layer; 6. Outer conductor; 7. Inner conductor; 8. Prefabricated rubber parts; 9. Main cable; 10. Single-core grounding cable; 11. Conductor; 12. Sealant filling port. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Figure 1 This is a schematic diagram of the structure of a cable connector with a multi-functional grounding method in one embodiment of the present invention; Figure 2 This is a schematic diagram of a cable connector with a multi-functional grounding method in another embodiment of the present invention.

[0022] like Figure 1 and Figure 2 As shown, a cable connector with a multi-functional grounding method in this embodiment includes a prefabricated rubber part 8, a terminal part, a protective shell, a grounding waterproof sealant layer, a main waterproof sealant layer, and a waterproof sealant layer 4.

[0023] The prefabricated rubber component 8 is sleeved on the outside of the insulation layer of the two main cables 9 and overlaps the outer shielding layer of the two main cables 9 at both ends.

[0024] The terminal block is connected to the grounding cable and the aluminum / copper wire shielding layer 5 of the two main cables 9, respectively.

[0025] like Figure 1 As shown, according to one embodiment of the present invention, the grounding cable is a single-core grounding cable 10. The terminal section is connected to the conductor 11 of the grounding cable and the aluminum / copper wire shielding layer 5 of the two main cables 9, respectively. In this embodiment, the terminal section includes three terminals 3. The aluminum / copper wires of the aluminum / copper wire shielding layer 5 of the two main cables 9 and the conductor wires of the conductor 11 of the grounding cable are respectively crimped onto the three terminals 3, and the three terminals 3 are fixed by bolts after being plugged and unplugged.

[0026] like Figure 2 As shown, according to another embodiment of the present invention, the grounding cable is a coaxial grounding cable 1. The terminal block has two terminal block units. The two ends of one terminal block unit are respectively connected to the aluminum / copper wire shielding layer 5 of a main cable 9 and the outer conductor 6 of the grounding cable, and the two ends of the other terminal block unit are respectively connected to the aluminum / copper wire shielding layer 5 of another main cable 9 and the inner conductor 7 of the grounding cable. In this embodiment, the terminal block unit includes two terminals 3. The two terminals 3 of one terminal block unit are crimped to the aluminum / copper wire shielding layer 5 of a main cable 9 and the outer conductor 6 of the grounding cable, and the two terminals 3 are fixed by bolts after being plugged in and unplugged; the two terminals 3 of the other terminal block unit are crimped to the aluminum / copper wire shielding layer 5 of another main cable 9 and the inner conductor 7 of the grounding cable, and the two terminals 3 are fixed by bolts after being plugged in and unplugged.

[0027] The protective shell is a fiberglass shell 2, which is fitted over the grounding cable and the two main cables 9, with the prefabricated rubber parts 8 and the terminal blocks located inside the protective shell. This protective shell includes two opposing components (such as...). Figure 1 and Figure 2 The diagram shows two semi-shells (arranged opposite each other) that are fixedly connected by bolts. Each semi-shell has a sealant filling port 12 communicating with the inner cavity of the protective shell, an end cap covering the sealant filling port 12, and a sealing tape layer wrapped around the sealant filling port 12 and the end cap. This sealing tape layer is a PVC sealing layer. The ends of the protective shell have a grounding opening for the grounding cable to extend and two main openings for the two main cables 9 to extend. The number of grounding openings depends on the type of cable joint. When the cable joint is a straight-through joint, the number of grounding openings is 1; when the cable joint is an insulated joint and the grounding cable is a single-core grounding cable 10, the number of grounding openings is 2.

[0028] The number of grounding waterproof sealant layers is the same as the number of grounding openings and they are correspondingly installed. Each grounding waterproof sealant layer wraps around the outer wall of the grounding opening and the part of the main cable 9 that extends out of the grounding opening. Specifically, the grounding waterproof sealant layer wraps around the outer wall of the corresponding grounding opening and the outer side of the grounding cable on the corresponding side. The corresponding side refers to the side where the grounding opening is located. For example, the grounding waterproof sealant layer on the left wraps around the outer wall of the grounding opening on the left side and the outer protective sleeve of the grounding cable on the left side.

[0029] Two main waterproof sealant layers are located on the outer walls of the two main openings respectively. Each main waterproof sealant layer wraps around the outer wall of the main opening and the part of the main cable 9 that extends out of the main opening, specifically on the outer wall of the corresponding main opening and the outer side of the outer sheath of the main cable 9 on the corresponding side.

[0030] The waterproof sealant layer 4 is formed by filling the protective shell with waterproof sealant.

[0031] This embodiment also provides a grounding method for a cable joint. The main cable 9, from the inside out, includes a conductor core, an insulation layer, an outer shielding layer, an aluminum / copper wire shielding layer 5, and an outer sheath, and includes the following steps:

[0032] Step 1: Strip the ends of the two main cables, sequentially peeling off the outer sheath, aluminum / copper wire shielding layer, outer shielding layer, and insulation layer. Peel the insulation layer to a suitable distance to expose the conductor core, allowing the connecting tube to be fitted over the conductor core of the two main cables 9. Peel the outer shielding layer to a suitable distance so that when the prefabricated rubber component 8 is fitted over the ends of the two main cables 9, part of the outer shielding layer is inside the prefabricated rubber component. The peeling distances for the outer shielding layer and insulation layer are existing technologies and will not be elaborated here. Peel the aluminum / copper wire shielding layer 5 and the outer sheath to a suitable distance so that after the protective shell is finally fitted, the aluminum wire shielding layer is outside the prefabricated rubber component 8 and inside the protective shell, while part of the outer sheath is inside the protective shell. Fit the two half-shells onto the ends of the two main cables 9 respectively.

[0033] Step 2: Place the connecting tube on the conductor cores at the ends of the two main cables 9, and put the prefabricated rubber part on the outside of the connecting tube, with both ends of the prefabricated rubber part 8 overlapping the outer shielding layer at the ends of the two main cables 9.

[0034] Step 3: Connect the aluminum / copper wire shielding layers 5 at the ends of the two main cables 9 to the grounding cable through terminals. When the grounding cable is a coaxial grounding cable 1, peel off the outer sheath, outer conductor 6, and insulation layer of the coaxial grounding cable 1 in sequence to expose the outer conductor 6 and inner conductor 7. Connect the aluminum / copper wire shielding layer 5 at the end of one main cable 9 to the outer conductor 6 of the coaxial grounding cable 1 through terminals, and connect the aluminum / copper wire shielding layer 5 at the end of the other main cable 9 to the inner conductor 7 of the coaxial grounding cable 1 through terminals. When the grounding cable is a single-core grounding cable 10, peel off the outer sheath and insulation layer of the single-core grounding cable 10 in sequence to expose the conductor 11. Connect the aluminum / copper wire shielding layers 5 at the ends of the two main cables 9 to the conductor 11 of the single-core grounding cable 10 through terminals.

[0035] Step 4: Fasten the two half-shells together to form a protective shell that is fitted onto the ends of the two main cables and the grounding cable.

[0036] Step 5: Wrap the grounding waterproof sealant layer around the outer wall of the grounding opening and the outer sheath of the grounding cable, wrap the main waterproof sealant layer around the outer wall of the main opening and the outer side of the outer sheath of the main cable 9, and fill the waterproof sealant into the protective shell through the sealant filling port 12 on the protective shell.

[0037] The installation process of the multi-functional grounding cable connector in this embodiment is as follows: The two half-shells are respectively fitted onto the ends of the two main cables 9. A connecting tube is fitted onto the conductor cores at the ends of the two main cables 9, and a prefabricated rubber component 8 is fitted onto the outside of the connecting tube, with both ends overlapping the outer shielding layer of the two main cables 9 (the connecting tube, prefabricated rubber component 8, and their installation method are existing technologies and will not be described in detail here). Then, depending on the type of grounding cable (coaxial and single-core), the aluminum / copper wire shielding layer 5 of the two main cables 9 is connected to the grounding cable through the terminal block 3. For different grounding cables, this can be achieved simply by changing the connection between the terminal blocks 3. The two half-shells are then secured with bolts. Then, a grounding waterproof sealant layer is wrapped around the outer wall of the grounding opening and the outside of the grounding cable, and a main waterproof sealant layer is wrapped around the outer wall of the main opening and the outside of the outer sheath of the main cable 9. Waterproof sealant is then filled into the protective shell through the sealant filling port 12. Finally, an end cap is placed on the sealant filling port 12, and a layer of PVC tape is wrapped around it.

[0038] In summary, these are specific application examples of the present invention and do not limit the scope of protection of the present invention. All technical solutions using equivalent substitutions fall within the scope of protection of the present invention.

Claims

1. A cable connector with a multi-functional grounding method, characterized in that, The device includes a prefabricated rubber component, a terminal block, and a protective shell. The prefabricated rubber component is fitted over the outer side of the insulation layer of two main cables and overlaps the outer shielding layer of the two main cables at both ends. The terminal block is connected to the grounding cable and the aluminum / copper wire shielding layer of the two main cables, respectively. The protective shell is fitted over the terminal block and the prefabricated rubber component. The end of the protective shell has a main opening for the main cables to extend and a grounding opening for the grounding cable to extend. It also includes a waterproof sealant layer, which fills the inside of the protective shell. When the grounding cable is a single-core grounding cable, the terminal section is connected to the conductor of the grounding cable and the aluminum / copper wire shielding layers of the two main cables respectively; When the grounding cable is a coaxial grounding cable, the terminal section has two terminal units. The two ends of one terminal unit are respectively connected to the aluminum / copper wire shielding layer of a main cable and the outer conductor of the grounding cable. The two ends of the other terminal unit are respectively connected to the aluminum / copper wire shielding layer of another main cable and the inner conductor of the grounding cable.

2. A cable connector with a multi-functional grounding method according to claim 1, characterized in that, The waterproof sealant layer fills the inner cavity of the protective shell.

3. A cable connector with a multi-functional grounding method according to claim 2, characterized in that, The protective shell is provided with a sealant filling port communicating with the inner cavity of the protective shell, an end cap covering the sealant filling port, and a sealing strip layer wrapped around the outside of the sealant filling port and the end cap.

4. A cable connector with a multi-functional grounding method according to claim 3, characterized in that, The sealing strip layer is a PVC sealing strip.

5. A cable connector with a multi-functional grounding method according to claim 1, characterized in that, The protective shell includes two opposing semi-shells, which are fixedly connected by bolts.

6. A cable connector with a multi-functional grounding method according to claim 1, characterized in that, It also includes a grounding waterproof sealant layer, which wraps around the outer wall of the grounding opening and the outside of the grounding cable.

7. A cable connector with a multi-functional grounding method according to claim 1, characterized in that, It also includes a main waterproof sealant layer, which wraps around the outer wall of the main opening and the outside of the main cable.

8. A grounding method for a cable joint, wherein the main cable comprises, from the inside out, a conductor core, an insulation layer, an outer shielding layer, an aluminum / copper wire shielding layer, and an outer sheath, characterized in that, Includes the following steps: Step 1: Strip the ends of the two main cables, peeling off the outer sheath, aluminum / copper wire shielding layer, outer shielding layer and insulation layer of the main cable ends in sequence to the corresponding set distance; Step 2: Place the connecting tube on the conductor cores at the ends of the two main cables, and put the prefabricated rubber part on the outside of the connecting tube, with both ends of the prefabricated rubber part overlapping the outer shielding layer at the ends of the two main cables. Step 3: Connect the aluminum / copper wire shielding layers at the ends of the two main cables to the grounding cable via terminals. When the grounding cable is a coaxial grounding cable, peel off the outer sheath, outer conductor, and insulation layer at the ends of the coaxial grounding cable in sequence. Connect the aluminum / copper wire shielding layer at the end of one main cable to the outer conductor of the coaxial grounding cable via terminals, and connect the aluminum / copper wire shielding layer at the end of the other main cable to the inner conductor of the coaxial grounding cable via terminals. When the grounding cable is a single-core grounding cable, peel off the outer sheath and insulation layer of the single-core grounding cable in sequence, and connect the aluminum / copper wire shielding layers at the ends of the two main cables to the conductor of the single-core grounding cable via terminals.

Images