Ceramic fire-resistant sheath material medium-voltage fire-resistant cable

Abstract

The invention discloses a ceramic fire-resistant sheath material medium-voltage fire-resistant cable, which comprises a front sheath and a rear sheath which are internally provided with cavities, the cavities are internally provided with wire clamp limiting frames and branch wire grooves, the wire clamp limiting frames are internally provided with puncture wire clamps, and the puncture wire clamps are used for installing a main cable; the branch wire groove is used for installing branch cables. Half-thread bushings are arranged on the front sheath and the rear sheath at the positions through which the main cable and the branch cable penetrate; the front sheath and the rear sheath can form a complete threaded sleeve after being folded, two pairs of symmetrically arranged spring pieces are arranged in the threaded sleeve, and the spring pieces clamp the cable after being screwed through locking bolts. According to the invention, the sheath is internally provided with the puncture wire clamp limiting frame, the main cable and the branch cable are installed on the wire clamp, and the main cable and the branch cable are clamped through the spring pieces, so that the puncture part can be prevented from being broken due to stress concentration; meanwhile, the branch cables are arranged on the two sides of the supporting rod in a scattered mode, one side of each branch cable is tightened through a tightening belt, and when the branch cables are pressed or pulled, cable connectors can be prevented from falling off.

Description

Technical Field

[0001] The invention relates to the technical field of cable sheaths and cables, and in particular to a medium-voltage fire-resistant cable with a ceramic fire-resistant sheath material. Background Art

[0002] Cables are everywhere in today's digital age, whether it is power transmission or signal transmission. Cable laying usually involves joints, and the common problem of joints is that they are easy to loosen and fall off.

[0003] The existing joint connection method is to wrap it, then fix it with a wire clamp, and finally pour the resin through the sheath. This operation method is still not stable enough. In the hot summer, the conductor in the sheath is prone to thermal expansion and contraction and be pulled off. In the snowy winter, the conductor in the sheath is easy to be pressed off. Summary of the invention

[0004] The main purpose of the present invention is to provide a medium-voltage fire-resistant cable with a ceramic fire-resistant sheath material, aiming to solve the technical problem that the medium-voltage fire-resistant cable in the prior art is easily pressed or pulled out in the sheath.

[0005] To achieve the above object, the present invention provides a medium-voltage fire-resistant cable with a ceramic fire-resistant sheath material, comprising: a front sheath, the front sheath being rotatably connected to a rear sheath; The front and rear sheaths are both provided with cavities, and the cavities are both fixed with wire clamp limit frames, the wire clamp limit frames are provided with puncture wire clamps, and the puncture wire clamps are provided with branch wire grooves; The piercing wire clamp is used to install the main cable; the branch cable trough is used to install the branch cable; The front sheath and the rear sheath are provided with semi-threaded sleeves at the places where the main cable and the branch cable penetrate through them; The front sheath and the rear sheath can form a complete threaded sleeve when they are closed together. Two pairs of symmetrically arranged spring sheets are arranged in the threaded sleeve. The spring sheets clamp the cable after being tightened by locking bolts.

[0006] Furthermore, the puncture wire clamp comprises a base, on which a clamp cover is rotatably mounted; The base and the clamping cover are both provided with a clamping opening, and the clamping opening is provided with a puncture for installing the main cable; The base is rotatably provided with a T-bolt; The clamping cover is provided with a U-shaped hole corresponding to the T-shaped bolt, and the clamping cover fastens the main cable to the base through the U-shaped opening and the T-shaped bolt.

[0007] Furthermore, a branch line slot is fixed on the puncture wire clamp, and a branch line connection hole and a screw hole are provided on the branch line slot, and the branch line connection hole and the screw hole are arranged perpendicular to each other; The branch cable is embedded in the branch line connection hole and fixed in the screw hole by screws.

[0008] Furthermore, the front and rear sheaths are both provided with support rods; An alignment axis is provided on the strut in the front sheath; An alignment hole adapted to the alignment shaft is provided on the support rod in the rear sleeve, and the alignment shaft is embedded in the alignment hole after the front sleeve and the rear sleeve are closed; There are at least two cable cores of the branch cable. After the branch cable is installed, the cable cores are dispersed on both sides of the support rod, and the cable cores close to one side of the branch trough are fastened by a cable tie.

[0009] Furthermore, the spring sheet is in the shape of a hollow truncated cone, and a U-shaped groove is provided on the spring sheet, and the notch of the U-shaped groove faces the axis; When the spring sheet is squeezed, the cable can be clamped.

[0010] Further, the locking bolt comprises a tightening section and a threaded section; The tightening section has a regular hexagonal or regular quadrilateral cross section; The thread provided on the threaded segment is adapted to the semi-threaded sleeve; The locking bolt is an open bolt and is provided with a round hole adapted to the cable inside.

[0011] Furthermore, the wire clamp limiting frame is provided with an adaptive wire clamp groove, a wire groove and a limiting groove.

[0012] Furthermore, the front and rear protective covers are both covered with sealing strips; The top of the front sheath is provided with a grease injection port, and the grease injection port is covered with a screw cap.

[0013] Furthermore, the front cover and the rear cover are connected by a hinge; The front and rear shields are both provided with bolt ears, and the front and rear shields are fastened by bolts penetrating the bolt ears.

[0014] The beneficial effects of the present invention are embodied in: In the present invention, a puncture wire clamp limit frame is arranged in the sheath, the main cable and the branch cable are installed on the wire clamp, and the main cable and the branch cable are clamped by a spring sheet, which can prevent the puncture point from breaking due to stress concentration; At the same time, the supporting cables are dispersedly arranged on both sides of the support pole, and one side is tightened by a tightening belt. When the supporting cables are compressed or pulled, the tension or pressure is borne by the support pole, which can prevent the cable connector from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 There is no front sheath structure schematic diagram; Figure 3 for Figure 2 Schematic diagram of the decomposition structure; Figure 4 It is a schematic diagram of the cable installation and rotation structure of the present invention; Figure 5 for Figure 4 Schematic diagram of the decomposition structure; Figure 6 This is a schematic diagram of the structure of the puncture wire clamp and branch wire slot of the present invention; Figure 7 It is a schematic diagram of the spring sheet structure of the present invention; Figure 8 It is a schematic diagram of the front sheath structure of the present invention; Fig. 9 It is a schematic diagram of the locking bolt structure of the present invention.

[0016] Description of reference numerals: 1. Front sheath, 2. Rear sheath, 2a. Half-threaded sleeve, 2b. Bolt ear, 3. Main cable, 4. Branch cable, 5. Piercing wire clamp, 5a. Base, 5b. Clamp cover, 5c. Wire clamp mouth, 5d. Piercing, 5e. U-shaped mouth, 6. Wire clamp limit frame, 6a. Wire clamp groove, 6b. Wire groove, 6c. Limit groove, 7. Support rod, 7a. Alignment hole, 7b. Alignment axis, 8. Spring sheet, 8a. U-shaped groove, 9. Locking bolt, 9a. Tightening section, 9b. Threaded section, 10. Branch line groove, 10a. Branch line connection hole, 10b. Screw hole, 11. T-bolt, 12. Screw, 13. Cable tie, 14. Hinge, 15. Sealing strip, 16. Grease injection port, 17. Screw cap. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0018] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0019] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that A and B meet at the same time. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist.

[0020] See also Figures 1 to 9 The present invention discloses a medium-voltage fire-resistant cable with a ceramic fire-resistant sheath material, characterized in that it comprises: a front sheath 1, wherein the front sheath 1 is rotatably connected to a rear sheath 2; The front sheath 1 and the rear sheath 2 are both provided with cavities, and a wire clamp limiting frame 6 is fixed in the cavities. A puncture wire clamp 5 is installed in the wire clamp limiting frame 6, and a branch wire groove 10 is provided on the puncture wire clamp 5. The piercing clamp 5 is used to install the main cable 3; the branch cable duct 10 is used to install the branch cable 4; The front sheath 1 and the rear sheath 2 are provided with a semi-threaded sleeve 2a at the places where the main cable 3 and the branch cable 4 penetrate; The front sheath 1 and the rear sheath 2 can form a complete threaded sleeve when they are closed together. Two pairs of symmetrically arranged spring leaves 8 are installed in the threaded sleeve. The spring leaves 8 clamp the cable after being tightened by the locking bolts 9.

[0021] In the present invention, the puncture wire in the sheath is used to install the main cable and the branch cable. The main cable and the branch cable are clamped by the spring sheet in the sheath to prevent the puncture point or the joint from breaking due to stress concentration. At the same time, the branch cable is dispersedly arranged on both sides of the support rod, and one side is tightened by a cable tie. When the branch cable is compressed or pulled, the tension or pressure is borne by the support rod, which can prevent the cable joint from falling off. The cable tie can tighten the dispersed cables and can be a nylon cable tie, a magic cable tie, etc.

[0022] In some embodiments, see Figure 5 and 6 As shown, the puncture wire clamp 5 comprises a base 5a, on which a clamp cover 5b is rotatably mounted; The base 5a, the clamp cover 5b are provided with a clamp line port 5c, the clamp line port 5c are provided with a puncture 5d for installing the main cable 3; The base 5a is rotatably provided with a T-bolt 11; The clamping cover 5 b is provided with a U-shaped hole 5 e corresponding to the T-shaped bolt 11 , and the clamping cover 5 b fastens the main cable 3 to the base 5 a through the U-shaped hole 5 e and the T-shaped bolt 11 .

[0023] In some embodiments, see Figure 5 and 6 As shown, a branch line slot 10 is fixed on the puncture line clamp 5, and a branch line connection hole 10a and a screw hole 10b are provided on the branch line slot 10, and the branch line connection hole 10a and the screw hole 10b are arranged perpendicular to each other; The branch cable 4 is embedded in the branch line connection hole 10a and fixed in the screw hole 10b by means of screws 12.

[0024] In some embodiments, see Figure 2 and 5 As shown, the front sheath 1 and the rear sheath 2 are both provided with support rods 7; The support rod 7 in the front sheath 1 is provided with an alignment axis 7b; The support rod 7 in the rear cover 2 is provided with an alignment hole 7a adapted to the alignment shaft 7b, and the alignment shaft 7b is embedded in the alignment hole 7a after the front cover 1 and the rear cover 2 are closed; The branch cable 4 has at least two cable cores. After the branch cable 4 is installed, the cable cores are dispersed on both sides of the support rod 7 , and the cable cores near one side of the branch duct 10 are fastened by a cable tie 13 .

[0025] In some embodiments, see Figure 2 and 7 As shown, the spring sheet 8 is a hollow truncated cone, and a U-shaped groove 8a is provided on the spring sheet 8, and the notch of the U-shaped groove 8a faces the axis; When the spring sheet 8 is squeezed, the cable can be clamped.

[0026] In some embodiments, see Fig. 9 As shown, the locking bolt 9 includes a tightening section 9a and a threaded section 9b; The tightening section 9a has a cross section of a regular hexagon or a regular quadrilateral; The thread provided on the threaded section 9b is adapted to the semi-threaded sleeve 2a; The locking bolt 9 is an open bolt, and a round hole adapted to the cable is provided inside.

[0027] In some embodiments, see Figure 3 and 8 As shown, the wire clamp limiting frame 6 is provided with a matching wire clamp groove 6a, a wire groove 6b, and a limiting groove 6c.

[0028] In some embodiments, see Figure 1As shown, the front cover 1 and the rear cover 2 are both covered with a sealing strip 15; The top of the front sheath 1 is provided with a grease injection port 16 , and the grease injection port 16 is covered with a screw cap 17 .

[0029] In some embodiments, see Figure 2 As shown, the front cover 1 and the rear cover 2 are connected by a hinge 14; The front sheath 1 and the rear sheath 2 are both provided with bolt ears 2b, and the front sheath 1 and the rear sheath 2 are fastened by bolts penetrating the bolt ears 2b.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material, characterized in that , comprising: a front sheath (1), the front sheath (1) being rotatably connected to a rear sheath (2); The front sheath (1) and the rear sheath (2) are both provided with cavities, and a wire clamp limiting frame (6) is fixed in each of the cavities. A puncture wire clamp (5) is installed in the wire clamp limiting frame (6), and a branch wire groove (10) is provided on the puncture wire clamp (5); The piercing wire clamp (5) is used to install the main cable (3); the branch cable duct (10) is used to install the branch cable (4); A semi-threaded sleeve (2a) is provided at the locations where the front sheath (1) and the rear sheath (2) are penetrated by the main cable (3) and the branch cable (4); The front sheath (1) and the rear sheath (2) can form a complete threaded sleeve when they are closed together. Two pairs of symmetrically arranged spring leaves (8) are installed in the threaded sleeve. The spring leaves (8) can clamp the cable when tightened by locking bolts (9).

2. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 1, characterized in that: The puncture wire clamp (5) comprises a base (5a), on which a clamp cover (5b) is rotatably mounted; The base (5a) and the clamp cover (5b) are provided with a wire clamping opening (5c), and the wire clamping opening (5c) is provided with a puncture (5d) for installing the main cable (3); The base (5a) is rotatably provided with a T-bolt (11); The clamping cover (5b) is provided with a U-shaped hole (5e) corresponding to the T-shaped bolt (11), and the clamping cover (5b) fastens the main cable (3) to the base (5a) through the U-shaped opening (5e) and the T-shaped bolt (11).

3. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 2, characterized in that: A branch line slot (10) is fixed on the puncture line clamp (5), and a branch line connection hole (10a) and a screw hole (10b) are provided on the branch line slot (10), and the branch line connection hole (10a) and the screw hole (10b) are arranged perpendicular to each other; The branch cable (4) is embedded in the branch line connection hole (10a) and fixed in the screw hole (10b) by means of a screw (12).

4. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 1, characterized in that: The front protective cover (1) and the rear protective cover (2) are both provided with support rods (7); An alignment axis (7b) is provided on the support rod (7) in the front protective sleeve (1); An alignment hole (7a) adapted to the alignment shaft (7b) is provided on the support rod (7) in the rear shield (2); the alignment shaft (7b) is embedded in the alignment hole (7a) after the front shield (1) and the rear shield (2) are closed; The branch cable (4) has at least two cable cores. After the branch cable (4) is installed, the cable cores are dispersed on both sides of the support rod (7), and the cable cores near one side of the branch duct (10) are fastened by a cable tie (13).

5. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 1, characterized in that: The spring sheet (8) is in the shape of a hollow truncated cone, and a U-shaped groove (8a) is provided on the spring sheet (8), wherein the notch of the U-shaped groove (8a) faces the axis; When the spring sheet (8) is squeezed, the cable can be clamped.

6. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 1, characterized in that: The locking bolt (9) comprises a tightening section (9a) and a threaded section (9b); The tightening section (9a) has a cross section of a regular hexagon or a regular quadrilateral; The thread provided on the threaded section (9b) is adapted to the semi-threaded sleeve (2a); The locking bolt (9) is an open bolt and is provided with a round hole inside that is adapted to the cable.

7. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 1, characterized in that: The wire clamp limiting frame (6) is provided with a matching wire clamp groove (6a), a wire groove (6b), and a limiting groove (6c).

8. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 4, characterized in that: The front protective cover (1) and the rear protective cover (2) are both provided with sealing strips (15) at the covering positions; The top of the front protective sleeve (1) is provided with a grease injection port (16), and the grease injection port (16) is covered with a screw cap (17).

9. A medium voltage fire-resistant cable with ceramic fire-resistant sheath material as claimed in claim 8, characterized in that: The front cover (1) and the rear cover (2) are connected via a hinge (14); The front sleeve (1) and the rear sleeve (2) are both provided with bolt ears (2b), and the front sleeve (1) and the rear sleeve (2) are fastened by bolts penetrating the bolt ears (2b).

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