Crimping device for BTTZ cable magnesium oxide filling core fixing pipe

Abstract

The utility model discloses a crimping device for a BTTZ cable magnesium oxide filling core fixing pipe, which comprises an inner mold ring, two ends of the inner mold ring are respectively provided with a limiting plate, and the middle part of the inner mold ring is provided with a plurality of annular pressing assemblies which are distributed in a central symmetry manner; the outer mold ring is rotatably installed outside the inner mold ring, a working cavity corresponding to the annular pressing assembly in position is formed in the middle of the outer mold ring, and a plurality of annular pressing protrusions and annular pressing grooves which are distributed in a central symmetry mode are formed in the inner wall of the working cavity; the two ends of the upper pressing shifting block are fixedly installed on the two limiting plates respectively. And the lower pressing shifting block is arranged on the outer mold ring. By means of the design, various different pipe diameters can be matched, the application range is wider, annular pressure stress is more uniform, and the crimping effect is better.

Description

Technical Field

[0001] The utility model relates to the field of cable production, in particular to a crimping device for a BTTZ cable magnesium oxide filling core tube. Background Art

[0002] BTTZ cable magnesium oxide filled centering tube is mainly used to guide the sliding of internal conductors during cable manufacturing. In order to accurately position, a centering head that fits closely with the conductor is generally set at the lower end of the centering tube. The existing centering tube and centering head are made of stainless steel. The centering head is generally welded to the lower end of the centering tube. The welding is difficult and not beautiful, so the crimping or ring pressing connection method is used instead.

[0003] The crimping device described in the utility model specifically refers to a ring pressing die, which is usually used in conjunction with a conversion head and a hydraulic mechanism. There is a relevant description in the utility model patent with patent number 202011120460X; the existing crimping device is a ring pressing die, and its ring pressing block is fixed and cannot be replaced, so the scope of application is relatively narrow. Generally, a ring pressing die is only suitable for one size of pipe fittings; in addition, the ring pressing force is not very uniform, especially when the movable module of the ring pressing block is closed, the ring pressing force is not directed to the center of the pipe fitting. Utility Model Content

[0004] The utility model aims to provide a crimping device for a BTTZ cable magnesium oxide filling core pipe which can match a variety of different pipe diameters, has a wider application range and is more uniform in ring pressure stress.

[0005] The purpose of the utility model is achieved as follows: a crimping device for a BTTZ cable magnesium oxide filling core tube, comprising an inner mold ring, two ends of the inner mold ring are respectively provided with a limit plate, and the middle part of the inner mold ring is provided with a plurality of centrally symmetrically distributed ring pressing components; an outer mold ring, the outer mold ring is rotatably mounted outside the inner mold ring, a working cavity is provided in the middle thereof, and a plurality of centrally symmetrically distributed ring pressing protrusions and ring pressing grooves are provided on the inner wall of the working cavity; an upper pressing block, the two ends of the upper pressing block are respectively fixedly mounted on two limit plates; a lower pressing block, the lower pressing block is arranged on the outer mold ring; each of the above-mentioned ring pressing components includes a sliding column, the sliding column is slidably mounted on the inner mold ring, and its outer end abuts against the inner wall of the working cavity; a positioning protrusion and a return spring are provided at the outer end of the sliding column, and the two ends of the return spring abut against the positioning protrusion and the inner mold ring respectively; a ring pressing block, the ring pressing block is detachably mounted on the inner end of the sliding column.

[0006] Compared with the prior art, the beneficial effects of the present invention are: the crimping device provided by the present invention can match a variety of different pipe diameters, has a wider range of applications, and the ring pressure force is more uniform, and the crimping effect is better; specifically, the ring pressing block provided by the present invention can be replaced with ring pressing blocks of various different thicknesses to adapt to different pipe diameters, so it has a wide range of applications; in addition, when the ring pressing assembly described in the present invention is working, multiple components work simultaneously, and all are aligned with the center of the pipe fitting and apply the ring pressing force at the same time, so that the ring pressing force is more uniform and the crimping effect is better.

[0007] Furthermore, the ring pressure block is provided with a docking groove, and the inner end of the sliding column is installed in the docking groove; the docking groove and the inner docking end of the sliding column are both provided with fixing holes with corresponding positions, the fixing hole in the docking groove is a threaded hole, and the fixing hole at the inner docking end of the sliding column is a through hole; the ring pressure assembly also includes a fixing screw that connects and fixes the sliding column and the ring pressure block together through the fixing hole. The docking structure of the ring pressure block and the sliding column designed in this way is simple, and the fixation is reliable and easy to disassemble and assemble.

[0008] Furthermore, a rotatable guide wheel is provided at the outer end of the sliding column. Such a design can reduce the wear of the sliding column, thereby extending the service life of the sliding column.

[0009] Furthermore, the inner side surfaces of the upper pressing and pulling block and the lower pressing and pulling block are both provided with disassembly grooves, so that the crimping device after ring pressing can be easily disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the core fixing tube described in the utility model.

[0011] Figure 2 It is a side structural schematic diagram of the utility model.

[0012] Figure 3 For along Figure 2 Schematic diagram of the cross-sectional structure along line AA.

[0013] Figure 4 It is a structural schematic diagram of the ring pressing assembly described in the utility model.

[0014] Figure 5 It is a schematic diagram of the internal structure of the utility model.

[0015] Among them, 1 is an inner mold ring, 2 is a limit plate, 3 is a sliding column, 3a is a positioning protrusion, 3b is a return spring, 3c is a guide wheel, 4 is a ring pressure block, 4a is a docking groove, 4b is a fixing screw, 5 is an outer mold ring, 6 is a working chamber, 6a is a ring pressure protrusion, 6b is a ring pressure groove, 7 is an upper pressing block, 8 is a lower pressing block, 9 is a disassembly groove, 10 is a core fixing tube, 11 is a core fixing head, and 12 is a sealing gasket. DETAILED DESCRIPTION

[0016] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0017] Combined with Figures 1 to 5 As shown, a crimping device for a BTTZ cable magnesium oxide filling core tube comprises an inner mold ring 1, wherein a limit plate 2 is respectively arranged at both ends of the inner mold ring 1, and a plurality of centrally symmetrically distributed ring pressing components are arranged in the middle of the inner mold ring 1; an outer mold ring 5, wherein the outer mold ring 5 is rotatably mounted outside the inner mold ring 1, wherein a working cavity 6 corresponding to the position of the ring pressing component is arranged in the middle thereof, and a plurality of centrally symmetrically distributed ring pressing protrusions 6a and ring pressing grooves 6b are arranged on the inner wall of the working cavity 6; an upper pressing block 7, wherein the upper pressing block 7 is provided with a plurality of centrally symmetrically distributed ring pressing protrusions 6a and ring pressing grooves 6b; and an upper pressing block 7. The two ends are fixedly mounted on the two limit plates 2 respectively; the lower pressing block 8, which is arranged on the outer mold ring 5; each of the above-mentioned ring pressing components includes a slide column 3, which is slidably mounted on the inner mold ring 1, and its outer end abuts against the inner wall of the working chamber 6; the outer end of the slide column 3 is provided with a positioning protrusion 3a and a return spring 3b, and the two ends of the return spring 3b abut against the positioning protrusion 3a and the inner mold ring 1 respectively; a ring pressing block 4, which is detachably mounted on the inner end of the slide column 3;

[0018] It should be noted that the annular pressing protrusions 6a and annular pressing grooves 6b are distributed at intervals and have a uniform transition with each other.

[0019] The above-mentioned ring pressure block 4 is provided with a docking groove 4a, and the inner end of the above-mentioned sliding column 3 is installed in the docking groove 4a; the above-mentioned docking groove 4a and the inner docking end of the sliding column 3 are both provided with fixing holes with corresponding positions, the fixing hole in the above-mentioned docking groove 4a is a threaded hole, and the fixing hole at the inner docking end of the above-mentioned sliding column 3 is a through hole; the above-mentioned ring pressure assembly also includes a fixing screw 4b that connects and fixes the sliding column and the ring pressure block together through the fixing hole.

[0020] A rotatable guide wheel 3c is provided at the outer end of the slide column 3.

[0021] The upper pressing and shifting block 7 and the lower pressing and shifting block 8 are provided with disassembly grooves 9 on their inner sides;

[0022] It should be noted that after the ring pressing connection between the core fixing head 11 and the core fixing tube 10 is completed, the upper clamping block 7 and the lower clamping block 8 may still be pressed against each other. At this time, the crimping device cannot be removed. At this time, just insert a flat-blade screwdriver into the disassembly groove 9 and pry it appropriately to separate the upper clamping block 7 from the lower clamping block 8, thereby loosening the ring pressing assembly and enabling the crimping device to be removed; after the ring pressing state is released, the ring pressing block 4 can be appropriately pushed with a tool to loosen it. After it is loosened, it will open under the action of the reset spring 3b, thereby facilitating the disassembly of the crimping device.

[0023] When the core tube and the core head are connected by ring pressure,

[0024] First, a sealing gasket 12 is installed at an appropriate position on the butt end of the core fixing tube 10, and a core fixing head 11 is installed on the butt end of the core fixing tube 10;

[0025] Afterwards, directly insert the crimping device into the butt end of the core tube 10 and align it with the position of the sealing gasket 12;

[0026] After that, manually tighten the upper pressing block 7 and the lower pressing block 8 appropriately, so that the ring pressing assembly slowly contracts and initially clamps the butt end of the core fixing tube 10;

[0027] Finally, the upper pressing block 7 and the lower pressing block 8 are clamped against each other by means of the conversion head and the hydraulic mechanism, so that they are pressed against each other for a period of time;

[0028] It should be noted that as the upper clamping block 7 and the lower clamping block 8 are clamped together, the inner mold ring 1 and the outer mold ring 5 rotate relative to each other, and the abutment position of the outer end of the sliding column 3 gradually changes. When the ring pressing is performed, the abutment position gradually moves from the ring pressing groove 6b to the ring pressing protrusion 6a, and the ring pressing block 4 gradually shrinks inward to further tighten the butt end of the core tube 10.

[0029] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A crimping device for BTTZ cable magnesium oxide filling core tube, characterized in that: The crimping device comprises An inner mold ring (1), wherein a limit plate (2) is provided at each end of the inner mold ring (1), and a plurality of centrally symmetrically distributed ring pressing components are provided in the middle of the inner mold ring (1); An outer mold ring (5), the outer mold ring (5) is rotatably mounted outside the inner mold ring (1), a working cavity (6) is provided in the middle thereof and the position thereof corresponds to the ring pressing assembly, and a plurality of ring pressing protrusions (6a) and ring pressing grooves (6b) are provided on the inner wall of the working cavity (6) and are symmetrically distributed in the center; An upper pressing and shifting block (7), the two ends of which are respectively fixedly mounted on the two limit plates (2); A lower pressing and shifting block (8), wherein the lower pressing and shifting block (8) is arranged on the outer mold ring (5); Each of the ring pressing components comprises A slide column (3), the slide column (3) being slidably mounted on the inner mold ring (1), and the outer end of the slide column (3) being against the inner wall of the working chamber (6); a positioning protrusion (3a) and a return spring (3b) are provided on the outer end of the slide column (3), and two ends of the return spring (3b) are respectively against the positioning protrusion (3a) and the inner mold ring (1); A ring pressure block (4), wherein the ring pressure block (4) is detachably mounted on the inner end of the sliding column (3).

2. A crimping device for a BTTZ cable magnesium oxide filling core tube according to claim 1, characterized in that: The ring pressure block (4) is provided with a docking groove (4a), and the inner end of the sliding column (3) is installed in the docking groove (4a); the docking groove (4a) and the inner docking end of the sliding column (3) are both provided with fixing holes with corresponding positions, the fixing hole in the docking groove (4a) is a threaded hole, and the fixing hole at the inner docking end of the sliding column (3) is a through hole; the ring pressure assembly also includes a fixing screw (4b) that connects and fixes the sliding column and the ring pressure block together through the fixing hole.

3. A crimping device for a BTTZ cable magnesium oxide filling core tube according to claim 1 or 2, characterized in that: A rotatable guide wheel (3c) is provided at the outer end of the sliding column (3).

4. A crimping device for a BTTZ cable magnesium oxide filling core tube according to claim 1 or 2, characterized in that: The inner side surfaces of the upper pressing and shifting block (7) and the lower pressing and shifting block (8) are both provided with disassembly grooves (9).

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