Cage stranding machine water-blocking cable oil filling device

Abstract

The present invention discloses an oil filling device for a cage twister water-blocking cable, comprising an oil filling mold and a gap-filling oil filling mold, wherein the gap-filling oil filling mold is located downstream of the oil filling mold; the oil filling mold has an oil filling cavity, and a sizing oil pressure cavity is provided at a small port of the oil filling cavity, the oil filling cavity is connected to an oil filling hole, and the oil filling hole is connected to an oil barrel through a first pipe and an oil grease pump, and multiple sub-unit wire cores enter the oil filling cavity after passing through a cage twister distribution disk, and then enter the sizing oil pressure cavity; the gap-filling oil filling mold has a supplementary oil cavity, and the supplementary oil cavity is connected to the oil barrel through a second pipe and an oil grease pump; the supplementary oil cavity has an inlet hole and an outlet hole, and multiple sub-unit wire cores coming out of the sizing oil pressure cavity enter the supplementary oil cavity from the inlet hole, and then pass through the outlet hole, thereby solving the problem of being unable to ensure that the water-blocking cable grease fills all the gap spaces of the cable, and solving the hidden dangers and quality problems of the oil-filled water-blocking cable.

Description

Technical Field

[0001] The invention relates to an oil filling device for a water-blocking cable of a cage stranding machine, which is used for filling oil paste into a plurality of sub-unit wire cores. Background Art

[0002] The principle and method of oil filling for twisting wires and cables in a cage stranding machine: Each subunit of the oil-filled cable is distributed in different stranding cages and cable frames of the cage stranding machine according to the structural requirements of the cable (different specifications occupy different numbers of cable frames). The subunits are arranged in a certain order through the cage stranding machine distribution disk according to the line sequence required by the process. Each wire core subunit is composed of two or more insulated single wires (usually 2 and 4). The twisted cable core then passes through the inside of the water-blocking oil-filling mold. When the twisted cable core passes through the inside of the oil-filling mold, the water-blocking cable grease is filled into the cable through the pressure applied by the oil filling pump. Since the water-blocking cable grease is filled into the twisted cable, the water-blocking cable grease is filled from the outside to the inside. Oil-filled water-blocking cable means filling all the gaps in the twisted cable core with water-blocking cable grease. However, since the water-blocking cable grease is filled from the outside inward, whether the center of the cable core is filled with water-blocking cable grease cannot be observed from the outside during the operation of the equipment. It is impossible to ensure that the water-blocking cable grease fills all the gaps in the cable, and the quality cannot be guaranteed.

[0003] The existing process method for producing water-blocking oil-filled cables using a cage stranding machine is as follows: all cable subunits are placed on the cradle of the cage stranding machine, and the cable subunits (wire groups) are arranged according to the process requirements of the cable specifications and models produced through the distribution disk at the head end of the cage stranding machine. All core subunits are arranged in a certain order inside the sizing die. Under the action of the rotation of the cage stranding machine and the die, the core units are twisted into a cable core according to a certain twisting pitch. The twisted cable core then passes through the water-blocking oil-filling mold to fill the cable with water-blocking cable grease. The oil-filled water-blocking cable is to fill the water-blocking cable grease into all the gaps in the twisted cable core. However, since the water-blocking cable grease is filled after the cable core is twisted, the water-blocking cable grease is filled from the outside to the inside. The viscosity of the water-blocking cable grease is relatively high. The higher the viscosity, the better the water-blocking effect. After the subunit cable cores are twisted into a cable, the contact surface gaps between the subunit cable cores are very fine. The viscosity of the water-blocking cable grease seriously hinders the passage of the water-blocking grease. Because the cable constantly passes through the oil-filling mold, the inlet and outlet cannot be sealed. The pressure from the oil pump is released at the unobstructed inlet and outlet, leaving insufficient filling capacity between the core subunits where resistance exists. This makes it impossible to determine whether the center of the cable core is fully filled with water-blocking cable grease. This is like passing a clenched fist through mud. The surface of the fist is covered with mud, but the palm may not be completely filled. Therefore, during operation, it is impossible to visually determine whether the center of the cable core is fully filled with water-blocking cable grease. This is because there may be some water-blocking cable grease on the surface, but not inside, or only partially. Furthermore, this cannot be detected in time during production, making it impossible to ensure that the water-blocking cable grease has fully filled all interstices in the cable, compromising quality.

[0004] The cable is partially lacking in water-blocking grease, which cannot guarantee product quality requirements and seriously affects the product qualification rate. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a cage stranding machine water-blocking cable oil filling device, which can realize the filling of cable grease from the inside to the outside of the cable core.

[0006] In order to solve the above technical problems, the cage stranding machine water-blocking cable oil filling device of the present invention includes an oil filling mold and a gap filling oil filling mold, and the gap filling oil filling mold is located downstream of the oil filling mold; the oil filling mold has a trumpet-shaped oil filling cavity, and the cone angle of the trumpet-shaped oil filling cavity is preferably 45°. A sizing oil pressure chamber is provided at the small end of the trumpet-shaped oil filling chamber, which is connected to the oil filling chamber. The oil filling hole is connected to the oil barrel through a first pipe and a first oil pump. The first oil pump fills the oil in the oil barrel into the oil filling chamber, and the multi-strand unit wire core passes through the cage twisting machine distribution disk and enters the oil filling chamber, and then enters the sizing oil pressure chamber; the gap filling oil filling mold has a supplementary oil chamber, and the supplementary oil chamber is connected to the oil barrel through a second pipe and a second oil pump. The second oil pump fills the oil in the oil barrel into the supplementary oil chamber; the supplementary oil chamber has an inlet hole and an outlet hole, and the multi-strand unit wire core coming out of the sizing oil pressure chamber enters the supplementary oil chamber from the inlet hole, and then passes through the outlet hole.

[0007] In order to adjust the distance between the oil-filled mold and the cage stranding machine distribution disk, the oil-filled mold is installed on a screw rod, and the movement of the screw rod adjusts the position of the oil-filled mold, thereby adjusting the distance between the oil-filled mold and the cage stranding machine distribution disk.

[0008] In order to recycle excess grease, a first excess grease recovery barrel is provided below the trumpet-shaped oil filling chamber. Furthermore, an oil receiving box is provided below the trumpet-shaped oil filling chamber, and the oil receiving box is connected to the first excess grease recovery barrel through a guide groove.

[0009] An oil scraper is provided downstream of the oil replenishment chamber. The oil scraper has an oil scraper hole. When the multiple sub-unit wire cores pass through the oil scraper hole, excess oil is scraped off. At the same time, a second excess oil recovery bucket is provided below the oil scraper.

[0010] Preferably, the sizing oil pressure cavity and the gap filling oil filling mold are on the same horizontal plane.

[0011] The principle is as follows: Multiple sub-unit cores are arranged according to cable core specifications via a stranding cage distribution drum and conductor pulley. Driven by the rotation and traction of the stranding cage, the sub-unit cores rotate and sequentially enter the oil filling cavity and sizing oil pressure cavity of the oil filling mold. Water-blocking cable grease is delivered to the filling cavity via a grease pump, grease delivery hose, and oil injection holes. The oil flow rate of the central oil filling mold is adjusted according to the diameter of the oil-filled cable being produced. The injected water-blocking cable grease is then carried by the rotating sub-unit cores from the center of the core distribution oil filling cavity to the tip (small end) of the tapered core distribution oil filling cavity, where it enters the sizing oil pressure cavity. During this process, the multiple sub-unit wire cores have not yet been bundled and twisted together within the core dispersion oil filling chamber and are still dispersed. Furthermore, the multiple sub-unit wire cores are close to the wall of the core dispersion oil filling chamber, so the introduced water-blocking cable grease will concentrate in the center of the multiple sub-unit wire cores. As the multiple sub-unit wire cores, carrying the water-blocking cable grease, gradually move toward the top (large end) of the core dispersion oil filling chamber and tighten the cable diameter before entering the sizing oil pressure chamber, the water-blocking cable grease, under the action of the squeezing force, will be squeezed outward from the center of the twisted cable core to fill the gaps between the multiple sub-unit wire cores from the inside out. The sizing oil pressure chamber of the oil filling mold controls the twisted cable diameter. During the production process, if too much water-blocking cable grease is injected, it will automatically overflow to the large end of the oil filling chamber and fall into the oil grease collection box below. The excess grease will be recovered by the oil grease collection box's guide groove and then recycled into the excess grease recovery bucket. When the amount of water-blocking cable grease injected is insufficient, the stranded cable core filled with water-blocking cable grease will have obvious signs of insufficient grease on its surface after exiting the central oil-filling mold outlet. At this point, open the grease flow valve of the gap-filling mold, and the water-blocking cable grease is injected into the oil replenishment cavity of the gap-filling oil-filling mold through the grease hose (pipeline), filling the surface of the stranded cable core that is not filled with grease with water-blocking cable grease. Use the oil scraper to scrape off the excess grease, which overflows from the gap-filling grease overflow cavity and falls into the grease recovery bucket below the mold. The entire oil-filling process can fully ensure that the water-blocking cable grease fills all gaps in the cable core.

[0012] The present invention fills the cable core with cable grease from the inside to the outside. First, the water-blocking grease is filled from the inside to the outside, and secondly, the outside is filled. When the oil filling is insufficient, the defect is manifested on the outside of the cable, and the production personnel can only observe it during the production process. Through the gap-filling oil filling tooling mold, the insufficient water-blocking cable grease on the cable surface is supplemented, so that all the gap spaces inside the oil-filled water-blocking cable are filled with water-blocking cable grease, which solves the problem of not being able to ensure that the water-blocking cable grease fills all the gap spaces of the cable, and solves the hidden dangers and quality problems of the oil-filled water-blocking cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 It is the front view of the present invention.

[0015] Figure 2 It is a top view of the present invention.

[0016] Figure 3 Schematic diagram of oil-filled mold.

[0017] Figure 4 Schematic diagram of the oil-filled mold.

[0018] Figure 5 Schematic diagram of oil filling. DETAILED DESCRIPTION

[0019] like Figure 1-5 As shown, the cage stranding machine water-blocking cable oil filling device includes an oil filling mold 18 and a gap filling oil filling mold. The gap filling oil filling mold is located downstream of the oil filling mold. The oil filling mold 18 (specifically the sizing oil pressure cavity 28) and the gap filling oil filling mold are on the same horizontal plane. The oil filling mold 18 has a mold clamping handle 4.

[0020] The oil-filling mold 18 has a trumpet-shaped oil-filling chamber 26 with a 45° taper angle. A sizing oil pressure chamber 28 is connected to the small end of the trumpet-shaped oil-filling chamber 26. The oil-filling chamber 26 is connected to an oil injection hole 27, which is connected to the oil barrel 15 via a first pipe 5 and a first oil pump. The first oil pump fills the oil in the oil barrel 15 into the oil-filling chamber 26. After passing through the cage stranding machine distribution reel 1, the multi-strand unit core 3 enters the oil-filling chamber 26 and then enters the sizing oil pressure chamber 28, forming the stranded multi-strand unit core 10.

[0021] Specifically, the oil-filling mold 18 is designed with a conical inner shape (i.e., the oil-filling chamber 26) and a cylindrical inner hole (i.e., the sizing oil pressure chamber 28) that matches the cable core. Its outer dimensions are designed as two cylindrical shapes, one large and one small, joined in a stepped pattern. The cone has an included angle of approximately 45° and a height of 120mm to 140mm. An oil-filling hole 27 is located approximately in the middle of the cone.

[0022] The oil-filling mold is mounted on the screw rod 7, which is mounted on the screw rod 7 via the fixture frame 6. The movement of the screw rod 7 adjusts the position of the oil-filling mold, thereby adjusting the distance between the oil-filling mold and the cage stranding machine distribution disk 1. The angle of the sub-unit core 3 is adjusted to about 40° by adjusting the screw rod 7. If the angle is less than 30°, the cable core sub-unit is misaligned, and if the angle is greater than 50°, the electrical indicators of the cable core sub-unit are likely to fail to meet the standards.

[0023] The gap filling oil filling mold has a supplementary oil chamber 9, which is connected to the oil barrel 15 through a second pipe 20 and a second oil pump. The second oil pump fills the oil in the oil barrel 15 into the supplementary oil chamber 9; the supplementary oil chamber 9 has an inlet hole and an outlet hole. The multi-strand unit wire core 3 coming out of the sizing oil pressure chamber 28 enters the supplementary oil chamber 9 from the inlet hole and then passes through the outlet hole.

[0024] The first grease pump and the second grease pump can be the same grease pump 8. In this case, the grease pump 8 is connected to the first pipeline 5 and the second pipeline 20 through a tee pipe. Valves 21, 22, and 23 are provided in three directions of the tee pipe.

[0025] In order to recycle excess grease, a first excess grease recovery barrel 13 is provided below the trumpet-shaped oil filling chamber 26. Furthermore, an oil receiving box 11 is provided below the trumpet-shaped oil filling chamber 26, and the oil receiving box 11 is connected to the first excess grease recovery barrel 13 through a guide groove 12.

[0026] An oil scraper 24 is provided downstream of the oil replenishment chamber 9. The oil scraper 24 has an oil scraping hole. When the multiple sub-unit cores 3 pass through the oil scraping hole, excess oil is scraped off and falls from the overflow chamber 25. At the same time, a second excess oil recovery bucket 17 is provided below the oil scraper 24.

[0027] The cable cabling process begins with the sub-unit cable cores 3 being placed in the cage stranding basket and passed through the cage stranding distribution reel 1. The sub-unit cores 3 are then arranged according to cable core specifications and passed through the oil-filled molds on the adjustable cage stranding center oil-filled mold frame 14. The angle of the sub-unit cores 3 is adjusted to approximately 40° by adjusting the screw 7.

[0028] The stranded cable core 3 passing through the oil filling mold 18 then passes through the gap filling mold, which is fixed on the gap filling mold frame 16, and the gap filling mold frame 16 is fixed on the gap filling mold fixed base plate 19. Adjust the centers of the gap filling mold and the oil filling mold 18 to the same center line.

[0029] Start the jelly pump 8, open the jelly flow valve 21 connected to the jelly pump 8, and open the oil filling mold valve 23 to fill the oil filling mold with oil. If it is found that the surface of the cable core exiting the oil filling mold 18 is not filled with enough jelly, open the oil filling mold jelly valve 22 to replenish water-blocking jelly. After completion, wrap the polyester tape around the cable core to secure it and then pull it onto the process drum.

[0030] The above embodiments do not limit the present invention in any way, and any technical solutions obtained by equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. Cage stranding machine water-blocking cable oil filling device, characterized by It includes an oil-filling mold and a gap-filling oil-filling mold, the gap-filling oil-filling mold is located downstream of the oil-filling mold, and there is a gap between the gap-filling oil-filling mold and the oil-filling mold; the oil-filling mold has a trumpet-shaped oil-filling cavity, and a sizing oil pressure cavity communicated with the trumpet-shaped oil-filling cavity at the small end thereof, the oil-filling cavity is connected with an oil filling hole, the oil filling hole is connected to the oil barrel through a first pipe and a first oil paste pump, the first oil paste pump fills the oil in the oil paste barrel into the oil-filling cavity, and the multiple sub-unit wire cores enter the oil-filling cavity after passing through the cage twisting machine distribution disk, and then enter the sizing oil pressure cavity; the gap-filling oil-filling mold has a supplementary oil cavity, the supplementary oil cavity is connected to the oil barrel through a second pipe and a second oil paste pump, and the second oil paste pump fills the oil in the oil paste barrel into the supplementary oil cavity; the supplementary oil cavity has an inlet hole and an outlet hole, and the multiple sub-unit wire cores coming out of the sizing oil pressure cavity enter the supplementary oil cavity from the inlet hole, and then pass through the outlet hole.

2. The cage stranding machine water-blocking cable oil filling device according to claim 1, characterized in that: The oil-filled mold is mounted on a screw rod, and the movement of the screw rod adjusts the position of the oil-filled mold.

3. The cage stranding machine water-blocking cable oil filling device according to claim 1, characterized in that: A first excess grease recovery bucket is provided below the trumpet-shaped oil filling cavity.

4. The oil filling device for water-blocking cables of a cage stranding machine according to claim 3, characterized in that: An oil receiving box is provided below the trumpet-shaped oil filling chamber, and the oil receiving box is connected to the first excess oil recovery barrel through a guide groove.

5. The oil filling device for water-blocking cables of a cage stranding machine according to claim 1, characterized in that: An oil scraper is provided downstream of the oil replenishing chamber. The oil scraper has an oil scraper hole. When the multiple sub-unit wire cores pass through the oil scraper hole, excess oil is scraped off.

6. The oil filling device for water-blocking cables of a cage stranding machine according to claim 5, characterized in that: A second excess grease recovery bucket is provided below the oil scraper.

7. The oil filling device for water-blocking cables of a cage stranding machine according to claim 1, characterized in that: The sizing oil pressure cavity and the gap filling oil filling die are on the same horizontal plane.

8. The oil filling device for water-blocking cables of a cage stranding machine according to claim 1, characterized in that: The cone angle of the trumpet-shaped oil-filled cavity is 45°.

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