Signal cable termination box and method

Abstract

The present disclosure provides a signal cable termination box and method, including a box body, a grounding terminal is arranged in the middle of the box body, and an extension portion is arranged on the box body, which has an angle with the extension direction of the box body, and a hole is arranged at the end of the extension portion; a sheath is arranged in the box body, and a plurality of clamps are arranged on the outside of the sheath, and the clamps are used to clamp the steel strip of the signal cable and the sheath, and the clamps are connected to the grounding terminal through a wire. The termination box provided by the present disclosure has a simple structure and is easy to use. When the termination box performs lightning protection and grounding of the signal cable, the setting position of the grounding terminal is horizontally set between two clamps, which can achieve the shortest connection of the grounding wire.

Description

Technical Field

[0001] The present invention belongs to the technical field of cable grounding, and in particular relates to a signal cable termination box and method. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] Signal cables are the transmission channels of railway signal control equipment and are widely used in railway and rail transit fields. In order to meet the requirements of lightning protection and anti-interference, signal cables need to have their metal sheaths and shielding layers reliably grounded before entering the cable room and conducting branch wiring. Traditional cable grounding is to connect the signal cable armored steel belt, aluminum sheath and shielding layer with a wire of not less than 1.5mm 2 Cable grounding is achieved by connecting the grounding wire to the nearest cable grounding bus. The welding parts of the cable grounding lead-out wires are protected by wrapping tape or filling rubber hoses with glue. Later, cable terminal boxes were used for grounding.

[0004] However, according to the inventors' understanding, the above methods all have the following problems:

[0005] a) The traditional grounding wire is too long, which affects the grounding effect.

[0006] b) When the traditional method of protection is to use tape wrapping, the life cycle of the protection point is short due to the life of the tape.

[0007] c) The rubber hose glue pouring protection method is used. Since this method has a semi-open structure, it is not convenient for glue pouring operations.

[0008] d) The old-style terminal box has problems such as poor sealing and poor contact of the internal connecting small hose clamp after being filled with glue. Summary of the invention

[0009] In order to solve the above problems, the present invention proposes a signal cable termination box and method. The cable grounding of the present invention adopts internal connection and terminal output mode, and directly realizes the shortest connection with the grounding bus, which solves various problems existing in the current cable grounding termination processing.

[0010] According to some embodiments, the present disclosure adopts the following technical solutions:

[0011] A signal cable termination box comprises a box body, a grounding terminal is arranged in the middle of the box body, and an extension portion is arranged on the box body, which has an angle with the extension direction of the box body, and a hole is arranged at the end of the extension portion;

[0012] A sheath is arranged in the box body, and a plurality of clamps are arranged outside the sheath. The clamps are used to clamp the steel strip of the signal cable disconnected from the sheath, and the clamps are connected to the grounding terminal through a wire.

[0013] As an optional embodiment, the box body includes two semi-cylinders, and the two semi-cylinders are clamped together.

[0014] As an optional embodiment, the two semi-cylinders include an upper semi-cylinder and a lower semi-cylinder, the upper semi-cylinder or the lower semi-cylinder is provided with a plurality of slots, and the other semi-cylinder is provided with a plurality of protrusions that match the slots one by one;

[0015] Alternatively, both of the two semi-cylinders are provided with a slot and a protrusion, and the slots of different semi-cylinders are staggered in position to match the protrusion of the other semi-cylinder.

[0016] As an optional implementation, screws are provided on the semi-cylinder.

[0017] As an optional embodiment, an extension portion is provided on one of the semi-cylinders, and the extension portion forms an angle of 30°-60° with the semi-cylinder.

[0018] Preferably, the extension portion and the semi-cylinder form an angle of 45° to meet the glue filling requirements of both horizontal and vertical installation methods of the end box.

[0019] As an optional embodiment, the clamp includes two, which are respectively arranged at the connection between the steel belt and the sheath, and on the sheath.

[0020] As an optional implementation, the ground terminal is disposed between two clamps in a horizontal direction.

[0021] As an optional embodiment, a plurality of convex points or protrusions are provided on the inner side of the clamp.

[0022] As an optional embodiment, the end of the extension portion is provided with a matching end cap.

[0023] As an optional embodiment, a sealing member is provided at the end of the box body.

[0024] Based on the working method of the above-mentioned signal cable termination box, when the cable is grounded for lightning protection, the outer sheath insulation layer is stripped off a certain length, and when the first termination is performed, the steel belt is disconnected, and the small clamp acts on the outer side of the steel belt breakpoint and the aluminum sheath respectively; when the second termination is performed, the steel belt and the sheath are connected with a clamp, and the inner shielding layer of the cable is connected to the grounding wire by winding;

[0025] After the above connection is completed, the box body is closed, and a sealing member is set at the port to form a closed space, and then filled with cold sealing glue.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The terminal box provided by the present invention has a simple structure and is easy to use. When the terminal box is used for lightning protection and grounding of the signal cable, the grounding terminal is set horizontally between two clamps to achieve the shortest connection of the grounding wire.

[0028] When the end of the terminal box is in use, a seal is set at the port to form a closed space, and cold sealing glue is filled to ensure a good seal without problems such as glue leakage. The structure is universal and can be widely used in railway signaling and rail transit industries. It can effectively improve the quality of cable lightning protection grounding, ensure the reliability of cable lightning protection grounding, and meet the quality standards of engineering construction.

[0029] The inner contact surface of the clamp of the terminal box is provided with multiple protrusions, which respectively clamp the outdoor steel belt and aluminum sheath at the disconnected part of the cable steel belt. After tightening, the contact at the protrusions is tight, and the contact resistance is not affected by factors such as glue filling, thus ensuring the reliability of cable grounding.

[0030] There is a certain angle between the extension part used for glue pouring and the box body structure of the terminal box, which can simultaneously meet the glue pouring needs of both horizontal and vertical installation modes of the terminal box. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure.

[0032] Figure 1 It is a schematic diagram of the structure of the present invention.

[0033] Among them, 1. Cable outlet; 2. Aluminum sheath; 3. Steel belt; 4. Lower semi-cylinder; 5. Sealing strip; 6. Clamp; 7. Grounding terminal; 8. Upper semi-cylinder; 9. Glue filling hole and end cover; 10. Fixing screw; 11. Cable entry. DETAILED DESCRIPTION

[0034] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present disclosure. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present disclosure belongs.

[0036] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure and should not be understood as limitations on the present disclosure.

[0038] In the present disclosure, terms such as "fixed connection", "connected", "connection", etc. should be understood in a broad sense, indicating that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present disclosure can be determined according to specific circumstances, and they cannot be understood as limitations on the present disclosure.

[0039] like Figure 1 As shown, the structure of the terminal box is a cylindrical structure to ensure sufficient space for loading cables. The structure is composed of two semi-cylinders made of plastic material, and the contact parts of the two semi-cylinders are provided with card slots and card engaging parts.

[0040] The two semi-cylinders include an upper semi-cylinder 8 and a lower semi-cylinder 4. A plurality of slots are provided on the upper semi-cylinder 8 or the lower semi-cylinder 4, and a plurality of engaging portions that match the slots one by one are provided on the other semi-cylinder.

[0041] Of course, in some embodiments, both half cylinders may be provided with a clamping groove and a clamping portion, and the positions of the clamping grooves of different half cylinders may be staggered to match the clamping portion of the other half cylinder.

[0042] In some embodiments, the two sides of the two semi-cylinders are crimped with a plurality of fixing screws 10 to ensure the sealing of the structure.

[0043] Of course, in this embodiment, plastic material is used because it is non-conductive, light in weight, and has a simple manufacturing process. In other embodiments, the material of the terminal box can be changed according to specific circumstances.

[0044] A grounding terminal is arranged in the middle of the semi-cylindrical structure on the upper part of the terminal box, and a grounding terminal 7 is arranged for primary termination and grounding termination of signal cables in the rail transit industry.

[0045] When used for secondary termination of cables, two grounding terminals 7 may be provided.

[0046] The top of the upper semi-cylinder 8 of the end box is provided with a glue filling part, the glue filling part is provided with glue filling holes, and is equipped with an end cover.

[0047] In this embodiment, the glue pouring portion forms an angle of 45° with the main body of the terminal box, which meets the glue pouring requirements of both horizontal and vertical installation modes of the terminal box.

[0048] In some other embodiments, the angle between the glue-filling portion and the main body can be changed.

[0049] Two clamps 6 are arranged inside the terminal box and connected to the grounding terminal 7 through a wire. The inner contact surface of the clamp 6 produces multiple convex points through a stamping process, which respectively clamp the outdoor steel belt 3 and the aluminum sheath 2 at the disconnected part of the cable steel belt 3. After tightening, the outdoor steel belt 3 and the aluminum sheath 2 at the convex points are in close contact, and the contact resistance is not affected by factors such as glue filling, thereby ensuring the reliability of cable grounding.

[0050] Of course, in other embodiments, the convex points may be replaced by protrusions, and the production process is not limited to the stamping process, and may be replaced by other methods such as integrated manufacturing.

[0051] The ends of the terminal box are provided with sealing strips 5 at the cable entry 11 and the cable exit 1.

[0052] In some embodiments, the sealing strip 5 can be replaced by other sealing components, such as a sealing tape, a rubber strip, etc.

[0053] When the cable is grounded for lightning protection, the outer sheath insulation layer is stripped off for a certain length. When the first termination is performed, the steel belt 3 needs to be disconnected, and the clamp 6 acts on the outer side of the steel belt 3 breakpoint room and the aluminum sheath 2 respectively; when the second termination is performed, the steel belt 3 and the aluminum sheath 2 are both disconnected and connected with the clamp 6, and the inner shielding layer of the cable is wound and connected with the grounding wire; when the signal cable in the rail transit industry is grounded, the steel belt 3 and the aluminum sheath 2 are disconnected and connected with the clamp 6 respectively. After the above connection is completed, the upper and lower semi-cylinders of the termination box are assembled and installed, and the sealing strips 5 are wound inside the two ports to form a closed space and then filled with cold sealing glue.

[0054] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

[0055] Although the above describes the specific implementation methods of the present disclosure in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present disclosure. Technical personnel in the relevant field should understand that on the basis of the technical solution of the present disclosure, various modifications or variations that can be made by those skilled in the art without creative work are still within the scope of protection of the present disclosure.

Claims

1. A signal cable termination box, characterized in that: It comprises a box body, a grounding terminal is arranged in the middle of the box body, an extension portion is arranged on the box body and has an angle with the extension direction of the box body, and a hole is arranged at the end of the extension portion; The box body is provided with a sheath, and a plurality of clamps are provided outside the sheath, the clamps are used to clamp the steel strip of the signal cable and the sheath at the disconnected part of the steel strip, and the clamps are connected to the grounding terminal through a wire; The clamps include two, which are respectively arranged at the connection between the steel belt and the sheath, and on the sheath; the setting position of the grounding terminal is arranged horizontally between the two clamps; a plurality of convex points or protrusions are arranged on the inner side of the clamp; after tightening, the outdoor steel belt at the convex points and the aluminum sheath are in close contact, the contact resistance is not affected by the glue injection, and the reliability of the cable grounding is ensured; The end of the box body is provided with a sealing member; the end of the terminal box is provided with sealing strips at the cable entry and cable exit.

2. A signal cable termination box as claimed in claim 1, characterized in that: The box body comprises two semi-cylinders, and the two semi-cylinders are clamped together.

3. A signal cable termination box as claimed in claim 2, characterized in that: The two semi-cylinders include an upper semi-cylinder and a lower semi-cylinder, wherein a plurality of slots are arranged on the upper semi-cylinder or the lower semi-cylinder, and a plurality of protrusions that match the slots one by one are arranged on the other semi-cylinder; Alternatively, the two semi-cylinders are both provided with a slot and a protrusion, and the slots of different semi-cylinders are staggered in position to match the protrusion of the other semi-cylinder.

4. A signal cable termination box as claimed in claim 3, characterized in that: The semi-cylinder is provided with screws.

5. A signal cable termination box as claimed in claim 2, characterized in that: One of them An extension portion is arranged on the semi-cylinder, and the extension portion forms an angle of 30°-60° with the semi-cylinder.

6. A signal cable termination box as claimed in claim 5, characterized in that: The extension portion and the semi-cylinder form an angle of 45°.

7. A signal cable termination box as claimed in claim 1, characterized in that: The end of the extension portion is provided with a matching end cap.

8. A working method of the signal cable termination box according to any one of claims 1 to 7, characterized in that: When the cable is grounded for lightning protection, the outer sheath insulation layer is stripped off to a certain length. When the cable is terminated once, the steel belt is disconnected, and the small clamps are applied to the outside of the steel belt breakpoint and the aluminum sheath respectively. When the cable is terminated twice, the steel belt and the sheath are connected with clamps, and the inner shielding layer of the cable is connected to the grounding wire by winding. After the above connection is completed, the box body is closed, and a sealing member is set at the port to form a closed space, and then filled with cold sealing glue.

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