Doubling forming die for large-section split conductor

Abstract

The utility model discloses a doubling forming die for a large-section split conductor, belongs to the field of cable equipment, and solves the problems of low roundness and deviation of eccentricity of cabling during doubling cabling of multiple split strand blocks in the prior art. According to the invention, the tubular mold body is internally provided with a forming cavity penetrating through the mold body; the forming cavity comprises a round pipe section and a horn mouth section, and the horn mouth section is located at one end of the round pipe section and forms a continuous cavity. The inner diameter of the horn mouth section is gradually reduced from one end far away from the circular pipe section to one end close to the circular pipe section; the mold body comprises two half-pipe molds which are oppositely arranged, and the two half-pipe molds are in butt joint to form the mold body; the butt joint gap of the two half-pipe molds is parallel to the axis of the mold body; the two half pipe molds are symmetrically arranged along the butt joint gap. According to the doubling forming die, the roundness and eccentricity of the cable can be guaranteed, regular twisting of the cable is achieved, and therefore roundness of the cable is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of for large cross section split conductor parallel wire forming die, belong to cable equipment field. BACKGROUND

[0002] In order to reduce proximity effect and skin effect, when the conductor cross-sectional area exceeds 800mm2, split conductor form is used, split conductor generally has four-core, five-core, six-core split etc. several types, and five split is mostly used in China. The shape of split strand has fan shape, tile shape and circular shape in the middle. The fewer the split strands in the split conductor, the easier to realize twisting, compacting, cabling and other processes in production.

[0003] Conductor cabling process is completed by spooling machine, and the spooling machine needs several pay-off reels, one of which is used to accommodate circular compacted conductor as cabling core, and the rest are used to accommodate split strands. After the strands pass through the concentrated phase detection device and the distribution board, they are spliced with the cabling core to form a split conductor, which needs to be parallel and formed. In the prior art, after the parallel and forming of each split strand, the roundness is low, and due to the lack of constriction, the internal stress released during twisting and cabling of the split strands may cause deformation of each split strand, affecting the eccentricity quality of the cable. SUMMARY

[0004] The utility model provides a kind of for large cross section split conductor parallel wire forming die, guarantees cable roundness and eccentricity, realizes the regular twisting of cable, so as to realize the roundness of cable.

[0005] The technical scheme adopted by the utility model is a kind of for large cross section split conductor parallel wire forming die, including tubular mould body, and the mould body is internally provided with forming cavity penetrating the mould body;

[0006] The forming cavity includes a circular tube section (201) and a flared mouth section (202), and the flared mouth section (202) is located at one end of the circular tube section (201) and forms a continuous cavity;The inner diameter of the flared mouth section (202) gradually decreases from the end away from the circular tube section (201) to the end close to the circular tube section (201).

[0007] The mould body includes two oppositely arranged half-pipe moulds (1), and the two half-pipe moulds (1) are butt-jointed to form the mould body;The butt-joint gap of the two half-pipe moulds (1) is parallel to the axis of the mould body.

[0008] The two half-pipe moulds (1) are symmetrically arranged along the butt-joint gap.

[0009] Optimally, the above-mentioned for large cross section split conductor parallel wire forming die has a positioning portion at the butt-joint gap of the two half-pipe moulds (1), and the positioning portion includes a positioning protrusion (301) and a positioning groove (302).

[0010] The positioning groove (302) is arranged on the abutting surface of one of the half pipe molds (1), and the positioning protrusion (301) is arranged on the other half pipe mold (1) and is inserted into the positioning groove (302).

[0011] In the optimized large-section split conductor parallel-wiring forming mold, the positioning protrusion (301) is in the shape of a strip; the radial section of the positioning protrusion (301) is semicircular, and the axial direction of the positioning protrusion (301) is perpendicular to the axis of the mold body; and the shape of the positioning groove (302) is matched with the positioning protrusion (301).

[0012] There are a plurality of positioning protrusions (301), which are arranged at intervals along the length direction of the abutting surface of the half pipe mold (1); and the number and position of the positioning grooves (302) are matched with the positioning protrusions (301).

[0013] In the optimized large-section split conductor parallel-wiring forming mold, the end of the mold body matched with the horn section (202) is provided with a reinforced connecting part (101), the reinforced connecting part (101) is in the shape of a ring, and the reinforced connecting part (101) is sleeved on the end of the mold body and is fixed with the mold body.

[0014] In the optimized large-section split conductor parallel-wiring forming mold, the end of the half pipe mold (1) is provided with a semicircular protrusion, and the semicircular protrusions of the two half pipe molds (1) are abutted to form the reinforced connecting part (101).

[0015] The half pipe mold (1) is integrally formed by stainless steel.

[0016] The technical scheme of the application has the advantages that the parallel-wiring forming mold is used to constrain each split strand during stranding and cabling. The entry end of the parallel-wiring forming mold is in the shape of a horn, which ensures that the irregular split conductors are stranded into the mold at a certain angle according to the set cabling pitch and cabling direction. The exit end of the parallel-wiring forming mold is in the shape of a pipe with a tolerance size (+0.02-0.1) of the outer diameter of the conductor, which ensures that the split conductors are regularly stranded in the mold to form a circular compact structure, improves the roundness of the conductor, and thus ensures the roundness and eccentricity of the cable. Therefore, the parallel-wiring forming mold is used in the cabling process, which ensures that the split conductors are regularly stranded within one pitch range, and thus the cable is round. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 FIG. 1 is a structural schematic diagram of the application;

[0018] Figure 2 FIG. 2 is a structural schematic diagram of two half pipe molds separated in the application;

[0019] Figure 3The internal structure diagram of the half pipe mold in the application. DETAILED DESCRIPTION

[0020] The technical features of the utility model will be further described below in combination with the drawings and specific embodiments.

[0021] As shown in the drawings, the utility model is a large cross-section split conductor parallel wire forming mold, which comprises a tubular mold body, and the mold body has a forming cavity penetrating through the mold body. The mold body of this embodiment adopts the form of a thick-walled metal pipe. Each split strand passes through the forming cavity and is parallel-wired in the forming cavity.

[0022] The forming cavity comprises a pipe section (201) and a flared section (202), and the flared section (202) is located at one end of the pipe section (201) and forms a continuous cavity. The inner diameter of the flared section (202) gradually decreases from the end away from the pipe section (201) to the end close to the pipe section (201).

[0023] Since the parallel wire forming mold of the application is used for cabling of large cross-section split conductors, the opening end of the flared section (202) is used as the entry end, which is in the form of a flared mouth, ensuring that the irregularly split conductors are twisted into the mold at a certain angle according to the set cabling pitch and direction. The opening of the pipe section (201) is used as the exit end, which adopts a tubular structure with a tolerance size (+0.02-0.1) of the outer diameter of the conductor. The tolerance size is controlled within the range of +0.02-0.1 mm, which ensures that the split conductors are regularly twisted in the mold to form a circular compact structure, improves the roundness of the conductor, and thus ensures the roundness and eccentricity of the cable.

[0024] The mold body of the application adopts the form of butt joint forming of two oppositely arranged half pipe molds (1), which avoids the inconvenience of the cable split strands and guide ropes in the initial stage due to the overall design. The butt joint gap of the two half pipe molds (1) is parallel to the axis of the mold body, and the two half pipe molds (1) are symmetrically arranged along the butt joint gap. The half pipe mold (1) is integrally formed from stainless steel.

[0025] The butt joint gap of the two half pipe molds (1) has a positioning part, which can ensure the accuracy of the butt joint of the two half pipe molds (1) and prevent the inner wall of the forming cavity from being uneven due to butt joint deviation.

[0026] In this embodiment, the positioning part comprises a plurality of positioning protrusions (301) and a plurality of positioning grooves (302). The positioning grooves (302) are formed on the butt joint surface of one of the half pipe molds (1), and the positioning protrusions (301) are formed on the other half pipe mold (1) and are inserted into the positioning grooves (302) in a matching manner.

[0027] The positioning protrusion (301) is in strip shape. The radial section of the positioning protrusion (301) is in semicircular shape, and the axial direction of the positioning protrusion (301) is perpendicular to the axis of the mold body. The positioning groove (302) is in a shape matched with the positioning protrusion (301). The positioning protrusions (301) are arranged at intervals along the length direction of the abutting surface of the half-pipe mold (1), and the number and positions of the positioning grooves (302) are matched with the positioning protrusions (301).

[0028] The end of the mold body matched with the horn mouth section (202) is provided with a reinforced connecting part (101). The reinforced connecting part (101) is in ring shape, and is sleeved on the end of the mold body and fixed with the mold body. The end of the half-pipe mold (1) is provided with a half-ring-shaped protrusion. The half-ring-shaped protrusions of the two half-pipe molds (1) are abutted to form the reinforced connecting part (101).

[0029] In this embodiment, the mold body has a large length-diameter ratio. The length-diameter ratio of the mold body can reach 6-10. Due to the large length-diameter ratio, the overall length of the mold body is long enough to ensure that the split conductors are within one pitch range, so that the regular twisting of the cable is realized, and the cable is round.

[0030] Of course, the above description is not a limitation of the present application. The present application is not limited to the above examples. Within the scope of the present application, changes, modifications, additions or replacements made by those skilled in the art should be within the protection scope of the present application.

Claims

1. A large cross-section split conductor cabling forming die, comprising a tubular die body, the die body having a forming cavity extending through the die body; characterized in that: the forming cavity comprises a circular tube section (201) and a flared section (202), the flared section (202) being located at one end of the circular tube section (201) and forming a continuous cavity; the inner diameter of the flared section (202) gradually decreases from the end away from the circular tube section (201) to the end close to the circular tube section (201); the die body comprises two oppositely arranged half-pipe dies (1), the two half-pipe dies (1) being butted to form the die body; the butt joint gap of the two half-pipe dies (1) is parallel to the axis of the die body; the two half-pipe dies (1) are symmetrically arranged along the butt joint gap.

2. The large cross-section split conductor laying forming die according to claim 1, characterized in that: the butt joint gap of the two half-pipe dies (1) has a positioning portion, the positioning portion comprising positioning protrusions (301) and positioning grooves (302); the positioning grooves (302) are formed on the butt joint surface of one of the half-pipe dies (1), and the positioning protrusions (301) are formed on the other half-pipe die (1) and are inserted into the positioning grooves (302) in a mating manner.

3. The large cross-section split conductor laying forming die according to claim 2, characterized in that: the positioning protrusions (301) are in the shape of a strip; the radial cross-section of the positioning protrusions (301) is semicircular, and the axial direction of the positioning protrusions (301) is perpendicular to the axis of the die body; the positioning grooves (302) are configured to match the positioning protrusions (301); there are a plurality of positioning protrusions (301), which are arranged at intervals along the length direction of the butt joint surface of the half-pipe die (1); the number and position of the positioning grooves (302) are configured to match the positioning protrusions (301).

4. The large cross-section split conductor cabling forming die according to claim 1, characterized in that: the end of the die body that is configured to match the flared section (202) has a reinforcing connection portion (101), the reinforcing connection portion (101) is in the shape of a ring, and the reinforcing connection portion (101) is sleeved on the end of the die body and fixed thereto.

5. The large cross-section split conductor cabling forming die according to claim 1, characterized in that: the end of the half-pipe die (1) has a semicircular protrusion, and the semicircular protrusions of the two half-pipe dies (1) are butted to form the reinforcing connection portion (101); the half-pipe die (1) is integrally formed from stainless steel.

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