Cable lead sheath cooling device

Abstract

The utility model discloses a cable lead sheath cooling device, which relates to the technical field of lead extrusion equipment and comprises an outer cooling cylinder, an inner cooling cylinder and an elastic locking mechanism, the inner cooling cylinder is sleeved in the outer cooling cylinder, the outer cooling cylinder and the inner cooling cylinder are both provided with interlayer water cavities, an outer nozzle communicated with the interlayer water cavities is fixed at the front end of the outer cooling cylinder, and an inner nozzle communicated with the interlayer water cavities is fixed at the rear end of the outer cooling cylinder. An inner nozzle communicated with the interlayer water cavity is fixed at the front end of the inner cooling cylinder; the elastic locking mechanism is arranged between the outer cooling cylinder and the inner cooling cylinder; the inner cooling cylinder has a locking state and an unlocking state which can be mutually switched through rotation, and the cooling device can respectively adopt the inner cooling cylinder or the outer cooling cylinder to cool and solidify a lead protection layer of the cable by controlling the state switching of the inner cooling cylinder. According to the cooling device, the cooling cylinders with different inner diameters can be switched according to needs to cool and solidify cables with different specifications and lead protection layer thicknesses, and the problems that an existing water cooling device of the lead extruding machine is low in utilization rate and complex in replacement procedure and affects production efficiency are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lead extruding equipment technical field, concretely relates to a cable lead sheath cooling device. BACKGROUND

[0002] The continuous lead extruding machine is one of the equipment for producing electric wire and cable, and is used for covering lead sheath on the cable. Figure 12 As shown in the figure, the continuous lead extruding machine usually comprises a die seat body 1, and the die seat body 1 is usually provided with a lead extruding device 2 comprising a front screw sleeve, a pressure equalizing ring, a flow guide die core, a die cover, a die adjusting cover ring, an adjusting screw rod and the like, in addition, the die seat body 1 is further fixed with a water cooling device 32 for water cooling the lead sheath. In actual use, the continuous lead extruding machine uniformly covers the lead liquid on the cable through the lead extruding device 2, and then cools the covered lead sheath through the water cooling device 32, so that the lead sheath is solidified and formed, thereby obtaining a lead-covered cable. The continuous lead extruding machine is widely used by cable manufacturers due to its high efficiency and good quality in covering lead sheath.

[0003] As known from Figure 11 , the existing water cooling device 32 usually fixes a cooling sleeve 33 with a sandwiched water cavity on the die seat body, and sets a water spraying hole 34 communicating with the sandwiched water cavity at the end of the cooling sleeve 33. When the cable covered with lead sheath is output from the lead extruding device, water is sprayed to the cable through the water spraying hole 34, so that the lead sheath is quickly cooled and solidified. However, the applicant found through careful analysis that the existing continuous lead extruding machine can cover lead sheaths of different thicknesses on cables of different specifications by adjusting the positions and distances of the components in the lead extruding device. However, due to the water cooling structure, it can only cool cables of a certain constant specification and constant lead sheath thickness. When cables of different specifications and different lead sheath thicknesses need to be produced, the continuous lead extruding machine needs to be replaced, or the entire water cooling structure needs to be replaced, resulting in the technical problems of low utilization rate of the continuous lead extruding machine, complex replacement process and influence on cable production efficiency. SUMMARY

[0004] The utility model aims at overcoming the above technical problems existing in the prior art, and provides a cable lead sheath cooling device. The cooling device adopts cooling cylinders with different inner diameters and can be quickly switched. In actual use, different inner diameter cooling cylinders can be switched according to needs to cool and solidify cables of different specifications and lead sheath thicknesses, solving the technical problems of low utilization rate of the existing lead extruding machine water cooling device, complex replacement process and influence on production efficiency.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a cable lead sheath cooling device, including outer cooling cylinder, inner cooling cylinder and elastic locking mechanism, the inner cooling cylinder is sleeved in outer cooling cylinder, both outer cooling cylinder and inner cooling cylinder are equipped with interlayer water cavity, and the front end of outer cooling cylinder is fixed with the outer nozzle that interlayer water cavity communicates, and the front end of inner cooling cylinder is fixed with the inner nozzle that interlayer water cavity communicates, and the elastic locking mechanism is arranged between outer cooling cylinder and inner cooling cylinder, the inner cooling cylinder has the locking state and the unlocking state that can be switched with each other by rotating, and the inner cooling cylinder can move axially in the unlocking state, and the inner cooling cylinder is limited by elastic locking mechanism and cannot move in the locking state, the cooling device can adopt inner cooling cylinder or outer cooling cylinder to cool and solidify the lead sheath of cable by controlling the state switching of inner cooling cylinder.

[0007] The outer nozzle and the inner nozzle are both provided with spray holes inclined towards the cable lead sheath, and the inclination angle of the spray hole on the inner nozzle is 30 degrees, and the inclination angle of the spray hole on the outer nozzle is 45 degrees.

[0008] When the inner cooling cylinder is in the locking state, the outer nozzle of the outer cooling cylinder is blocked by the inner cooling cylinder.

[0009] The elastic locking mechanism comprises a small hand wheel, a locking ring, elastic components and a locking block, the locking block is fixed to the outer surface of the rear part of the inner cooling cylinder, the small hand wheel is fixed to the rear end of the outer cooling cylinder, the locking ring is connected to the rear side of the small hand wheel through a plurality of elastic components, the inner diameter of the small hand wheel is larger than the inner diameter of the outer cooling cylinder, the inner diameter of the locking ring is between the outer diameter of the inner cooling cylinder and the inner diameter of the small hand wheel, there is a locking gap between the locking ring and the small hand wheel, the locking ring is provided with a gap notch for the locking block to pass through, and the locking block can move to the front side of the locking ring through the gap notch, in the locking state, the locking block is dislocated from the gap notch, the locking block is located in the locking gap and is blocked by the locking ring, and the inner cooling cylinder cannot move, and in the unlocking state, the locking block is located in the gap notch, the locking block is separated from the locking gap, and the inner cooling cylinder can move axially.

[0010] The elastic components comprise positioning screws, spacer nuts, gaskets and springs, the gaskets and the spacer nuts are respectively located on both sides of the locking ring, the positioning screws are fixed to the small hand wheel in sequence after passing through the gaskets, the locking ring and the spacer nuts, the springs are sleeved on the positioning screws and located between the gaskets and the locking ring, and the locking ring can be compressed elastically under stress and increase the locking gap.

[0011] The rear end of the outer cooling cylinder is internally provided with a diameter expansion section communicating with the locking gap, the locking block comprises a locking part and a positioning part respectively matched with the locking gap and the diameter expansion section, the locking part is integrally formed at the rear end of the positioning part and protrudes from the outer surface of the positioning part, and the elastic locking mechanism fixes the inner cooling cylinder through the locking ring and the locking part.

[0012] The locking part is provided with an extrusion inclined surface for extruding into the locking gap and a locking flat surface for cooperating with the locking ring.

[0013] The outer surface of the rear part of the inner cooling cylinder is fixed with positioning blocks, and the locking ring is provided with positioning notches matched with the positioning blocks, and the positioning blocks enter into the expanding section through the positioning notches.

[0014] The number of the locking blocks and the positioning blocks is two, and the two locking blocks and the two positioning blocks are symmetrically arranged, and the adjacent locking block and the positioning block are distributed at 90 degrees.

[0015] The rear end of the outer cooling cylinder and the rear end of the inner cooling cylinder are fixed with water inlet pipes communicated with the interlayer water cavity.

[0016] The utility model discloses the advantages lie in:

[0017] 1, the key improvement point of the utility model lies in setting the elastic locking mechanism between the inner cooling cylinder and the outer cooling cylinder with different inner diameters, so that the elastic locking mechanism can be used to quickly realize the dismounting and mounting of the inner cooling cylinder, and the inner cooling cylinder or the outer cooling cylinder can be conveniently and quickly switched in actual use, thereby being favorable for cooling and solidifying the cable of different specifications and lead sheath thickness, not only improves the utilization rate and production efficiency of the continuous lead extruding machine, but also makes the replacement process of the inner cooling cylinder more simple and convenient, and the practicality is stronger, and the innovation is higher.

[0018] 2, the utility model discloses the inclination angle of the spraying hole on the inner nozzle and the outer nozzle is respectively different 30 degrees and 45 degrees, and the cable of different specifications and lead sheath thickness can be better cooled.

[0019] 3, the utility model discloses the outer nozzle of the outer cooling cylinder is set to be blocked by the inner cooling cylinder, and when the inner cooling cylinder is used for cooling, the outer cooling cylinder is prevented from being accidentally opened and affecting the cooling effect of the cable.

[0020] 4, the elastic component of the utility model has the advantages of simple structure, good locking effect of the inner cooling cylinder and convenient quick dismounting of the inner cooling cylinder.

[0021] 5, the positioning part on the locking block can increase the contact area between the locking block and the inner cooling cylinder, which is favorable for improving the stability and reliability of the locking block on the inner cooling cylinder, and is also favorable for improving the stability and reliability of the inner cooling cylinder fixed in the outer cooling cylinder.

[0022] 6, the locking plane cooperates with the extruding inclined surface, and the locking block can be rotated into the locking gap for locking by using smaller force.

[0023] 7. The utility model discloses a positioning gap and positioning block cooperation, is favorable to accurately guiding the inner cooling cylinder to enter into the outer cooling cylinder, and can use the positioning block to the inner cooling cylinder positioning to make the inner cooling cylinder can with the outer cooling cylinder keep the axis line coincidence, is favorable to improving the uniformity of cable cooling.

[0024] 8. The utility model discloses two symmetrical locking blocks and two symmetrical positioning blocks cooperation, is favorable to further promote the stable reliability of inner cooling cylinder fixed. DRAWINGS

[0025] Figure 1 It is the transverse section structure schematic drawing of the utility model;

[0026] Figure 2 It is Figure 1 It is the enlarged structure schematic drawing of the place M in;

[0027] Figure 3 It is the assembly structure schematic drawing of the utility model;

[0028] Figure 4 It is the transverse section structure schematic drawing of the outer cooling cylinder;

[0029] Figure 5 It is the transverse section structure schematic drawing of the inner cooling cylinder;

[0030] Figure 6 It is Figure 5 It is the A-A section structure schematic drawing of;

[0031] Figure 7 It is the three-dimensional structure schematic drawing of the inner cooling cylinder;

[0032] Figure 8 It is the plane structure schematic drawing of the utility model installed on a continuous extrusion machine;

[0033] Figure 9 It is Figure 8 It is the enlarged structure schematic drawing of the place N in;

[0034] Figure 10 It is Figure 8 It is the transverse section structure schematic drawing of;

[0035] Figure 11 It is Figure 8 It is the three-dimensional structure schematic drawing of;

[0036] Figure 12 It is the transverse section structure schematic drawing of the existing continuous extrusion machine.

[0037] The markings in the diagram are as follows: 1. Mold base body, 2. Lead extrusion device, 3. Sleeve, 4. Front threaded sleeve, 5. Guide block, 6. Pressing outer threaded sleeve, 7. Pressing inner threaded sleeve, 8. Elastic locking mechanism, 9. Outer cooling cylinder, 10. Inner cooling cylinder, 11. Jacketed water cavity, 12. Outer nozzle, 13. Inner nozzle, 14. Small handwheel, 15. Locking ring, 16. Elastic component, 17. Locking block, 18. Locking gap, 19. Relief notch, 20. Water inlet pipe, 21. Positioning screw, 22. Spacer nut, 23. Washer, 24. Spring, 25. Locking part, 26. Positioning part, 27. Extrusion ramp, 28. Locking plane, 29. Large handwheel, 30. Positioning notch, 31. Positioning block, 32. Water cooling structure, 33. Cooling sleeve, 34. Water spray hole. Detailed Implementation

[0038] Firstly, this utility model provides a cable lead sheath cooling device, which is mainly used in continuous lead extrusion machines. For example... Figures 1-7 As shown, the cooling device includes an outer cooling cylinder 9 and an inner cooling cylinder 10. The inner cooling cylinder 10 is fitted inside the outer cooling cylinder 9, with its rear end located outside the outer cooling cylinder 9. The inner cooling cylinder 10 can rotate within the outer cooling cylinder 9 without external constraint. Both the outer cooling cylinder 9 and the inner cooling cylinder 10 are provided with a jacketed water cavity 11. A water inlet pipe 20 communicating with the jacketed water cavity 11 is fixed to the rear end of both the outer cooling cylinder 9 and the inner cooling cylinder 10. An outer nozzle 12 communicating with the jacketed water cavity 11 is fixed to the front end of the outer cooling cylinder 9, and an inner nozzle 13 communicating with the jacketed water cavity 11 is fixed to the front end of the inner cooling cylinder 10. Both the outer nozzle 12 and the inner nozzle 13 face the cable to be cooled.

[0039] like Figures 1-3 As shown, the cooling device also includes an elastic locking mechanism 8, which is disposed between the outer cooling cylinder 9 and the inner cooling cylinder 10. The inner cooling cylinder 10 is installed inside the outer cooling cylinder 9 via the elastic locking mechanism 8. Based on this elastic locking mechanism 8, the inner cooling cylinder 10 has a locked state and an unlocked state that can be switched between each other by rotation. That is, rotating the inner cooling cylinder 10 in the locked state switches the inner cooling cylinder 10 to the unlocked state, and rotating the inner cooling cylinder 10 in the unlocked state switches the inner cooling cylinder 10 to the locked state. In the locked state, the inner cooling cylinder 10 is restricted from movement by the elastic locking mechanism 8, and in the unlocked state, the inner cooling cylinder 10 can move axially. By controlling the state switching of the inner cooling cylinder 10, the cooling device can use either the inner cooling cylinder 10 or the outer cooling cylinder 9 to cool and solidify cables of different specifications and lead sheath thicknesses.

[0040] When the cable with small size and / or thin lead sheath needs to be produced, the water can be sprayed to the cable through the cooperation of the inner cooling cylinder 10 and the inner nozzle 13 for cooling and solidification. When the cable with larger size and / or thicker lead sheath needs to be produced, the inner cooling cylinder 10 is controlled to rotate first, so that the inner cooling cylinder 10 is switched from the locked state to the unlocked state, at this time, the inner cooling cylinder 10 can move axially in the outer cooling cylinder 9, and the inner cooling cylinder 10 is withdrawn backward (left) to switch to the working state of the outer cooling cylinder 9. The whole switching process only needs to rotate the inner cooling cylinder 10, and the operation is more simple and convenient.

[0041] In one specific embodiment, as shown in Figure 4 、 5 , the outer nozzle 12 and the inner nozzle 13 are both inclinedly provided with spray holes towards the lead sheath of the cable, and the inclination angle of the spray holes on the inner nozzle 13 is 30 degrees, and the inclination angle of the spray holes on the outer nozzle 12 is 45 degrees. In addition, when the inner cooling cylinder 10 is in the locked state, that is, after the inner cooling cylinder 10 is fixed in the outer cooling cylinder 9, the outer nozzle 12 of the outer cooling cylinder 9 is blocked by the inner cooling cylinder 10, preventing the outer cooling cylinder from being accidentally opened and affecting the cooling effect of the cable.

[0042] In one specific embodiment, as shown in Figures 1-3 , the elastic locking mechanism 8 includes a small hand wheel 14, a locking ring 15, a plurality of elastic components 16 and a locking block 17. The locking block 17 is fixed to the outer surface of the rear part of the inner cooling cylinder 10, the small hand wheel 14 is fixed to the rear end face of the outer cooling cylinder 9, the number of the elastic components 16 is multiple, in this embodiment, the number of the elastic components 16 is 3 and is evenly arranged, and the locking ring 15 is connected to the rear side of the small hand wheel 14 through the plurality of elastic components 16.

[0043] The inner diameter of the small hand wheel 14 is larger than the inner diameter of the outer cooling cylinder 9, the inner diameter of the locking ring 15 is between the outer diameter of the inner cooling cylinder 10 and the inner diameter of the small hand wheel 14, there is a locking gap 18 between the locking ring 15 and the small hand wheel 14, the locking ring 15 is provided with a gap notch 19 for the locking block 17 to pass through, and the locking block 17 can move to the front side of the locking ring 15 through the gap notch 19. When the locking ring 15 is subjected to a backward (left) force, the elastic components 16 can be compressed, so that the locking gap 18 is increased, and the locking block 17 is facilitated to enter the locking gap 18.

[0044] When the inner cooling cylinder 10 is in the locked state, the locking block 17 is misaligned with the clearance gap 19, the locking block 17 is located in the locking gap 18 and is blocked by the locking ring 15, the inner cooling cylinder 10 cannot move, at this time, the inner cooling cylinder 10 can be used to cool the cable with smaller size and / or thinner lead sheath. When the inner cooling cylinder 10 is in the unlocked state, the locking block 17 is located in the clearance gap 19, the locking block 17 is out of the locking gap 18, the inner cooling cylinder 10 can move axially, at this time, the inner cooling cylinder 10 can be pulled out of the outer cooling cylinder 9, and then the outer cooling cylinder 9 can be switched to cool the cable with larger size and / or thicker lead sheath.

[0045] In the embodiment, as shown in Figure 2 , the elastic assembly 16 includes a positioning screw 21, a spacer nut 22, a gasket 23 and a spring 24, the locking ring 15 is provided with a positioning hole, the gasket 23 and the spacer nut 22 in each set of elastic assembly 16 are located on the two sides of the locking ring 15, the positioning screw 21 in each set of elastic assembly 16 is fixed on the small hand wheel 14 after passing through the gasket 23, the positioning hole on the locking ring 15 and the spacer nut 22 in turn, the spring 24 is sleeved on the positioning screw 21 and located between the gasket 23 and the locking ring 15, under the action of the spring 24, the locking ring 15 is always located on the side close to the spacer nut 22, when the locking ring 15 is subjected to a backward force, the locking ring 15 will compress the spring 24 and increase the locking gap 18, so that the locking block 17 enters, making the disassembly and assembly of the cooling cylinder more simple and convenient.

[0046] It should be noted that, as shown in Figure 3 , the locking ring 15 is also provided with a through hole, the water inlet pipe 20 on the outer cooling cylinder 9 can pass through the locking ring 15 through the through hole, and the water inlet pipe 20 on the inner cooling cylinder 10 can be perpendicular to the inner cooling cylinder 10.

[0047] In a specific embodiment, as shown in Figure 1 , 2 , 7, the rear end of the outer cooling cylinder 9 is internally provided with a diameter expansion section which is communicated with the locking gap 18, and the inner diameter of the diameter expansion section is also smaller than the inner diameter of the small hand wheel 14. Correspondingly, the locking block 17 includes a locking part 25 which is matched with the locking gap 18 and a positioning part 26 which is matched with the diameter expansion section, the locking block 17 is welded and fixed on the inner cooling cylinder 10 through the positioning part 26, the locking part 25 is integrally formed at the rear end of the positioning part 26 and protrudes from the outer surface of the positioning part 26, and the elastic locking mechanism 8 enters the locking gap 18 through the locking part 25 and is blocked by the locking ring 15 to fix the inner cooling cylinder 10, so as to improve the stability and reliability of the inner cooling cylinder 10 fixed in the outer cooling cylinder 9.

[0048] In the embodiment, as shown in Figure 7As shown, the locking portion 25 is provided with an extrusion inclined surface 27 for extruding into the locking gap 18 and a locking flat surface 28 for cooperating with the locking ring 15, when the inner cooling cylinder 10 rotates, the extrusion inclined surface 27 enters the locking gap 18 first than the locking flat surface 28, so that the state switching of the inner cooling cylinder 10 is more smooth, and time and labor are saved.

[0049] In one specific embodiment, as shown in the drawings, Figure 3 As shown, the outer surface of the rear part of the inner cooling cylinder 10 is fixed with a positioning block 31, and the locking ring 15 is provided with a positioning notch 30 matched with the positioning block 31, and the positioning block 31 enters the expanded diameter section through the positioning notch 30.

[0050] Further, as shown in the drawings, Figures 5-7 As shown, the number of the locking blocks 17 and the positioning blocks 31 is two, and the two locking blocks 17 and the two positioning blocks 31 are symmetrically arranged, and the adjacent locking blocks 17 and the positioning blocks 31 are distributed at 90 degrees. In this way, the axis of the inner cooling cylinder 10 and the outer cooling cylinder 9 can be kept coincident, so as to further improve the stability and reliability of the fixed inner cooling cylinder 10 and the cooling effect on the cable.

[0051] In the second aspect, the utility model also provides a continuous lead extruding machine using the above-mentioned cable lead sheath cooling device, as shown in the drawings, Figures 8-11 As shown, the continuous lead extruding machine further comprises a die seat body 1, the die seat body 1 is fixed with an extruding device 2, the rear end of the die seat body 1 (the left end in the drawing direction) is fixed with a sleeve 3, and the die seat body 1 is connected with a detachable fixing assembly through the sleeve 3, the cooling device is installed on the die seat body 1 through the fixing assembly and the sleeve 3, the fixing assembly comprises a front screw sleeve 4, a guide block 5, a pressing outer screw sleeve 6 and a pressing inner screw sleeve 7, the front end of the front screw sleeve 4 is fixedly screwed in the sleeve 3, the front screw sleeve 4 is provided with a step, the pressing outer screw sleeve 6 is screwed on the rear end of the front screw sleeve 4, the pressing inner screw sleeve 7 is screwed in the pressing outer screw sleeve 6, and the guide block 5 is fixed at the step in the front screw sleeve 4 by the pressing outer screw sleeve 6 and the pressing inner screw sleeve 7. The outer cooling cylinder 9 is fixed in the front screw sleeve 4 through the guide block 5, the middle part of the outer cooling cylinder 9 is screw-connected with the guide block 5, the rear end of the outer cooling cylinder 9 is fixedly provided with a large hand wheel 29, the rotation of the outer cooling cylinder 9 is controlled through the large hand wheel 29, the outer cooling cylinder 9 can be axially moved in the front screw sleeve 4, so that the axial position of the outer cooling cylinder 9 in the front screw sleeve 4 is adjustable.

[0052] The working principle of the utility model is as follows:

[0053] In the initial state, the inner cooling cylinder 10 is in the locked state, the locking block 17 is out of position with the position-allowing notch 19, the locking block 17 is located in the locking gap 18 and is blocked by the locking ring 15, the inner cooling cylinder 10 cannot move in the outer cooling cylinder 9, and at this time, it is suitable for producing cables with smaller specifications and / or thinner lead sheaths. During production, no water is introduced into the outer cooling cylinder 9, only the inner cooling cylinder 10 is introduced into water, so that the water is sprayed to the cable for cooling and solidification through the cooperation of the inner cooling cylinder 10 and the inner nozzle 13.

[0054] When it is necessary to produce cables with larger specifications and / or thicker lead sheaths, the inner cooling cylinder 10 is first controlled to rotate, so that the inner cooling cylinder 10 is switched from the locked state to the unlocked state, at this time, the locking block 17 is located in the position-allowing notch 19, the locking block 17 is out of the locking gap 18, and the inner cooling cylinder 10 can move axially, and the inner cooling cylinder 10 can be pulled out of the outer cooling cylinder 9 by force, and then the outer cooling cylinder 9 is switched to be used to cool the cables with larger specifications and / or thicker lead sheaths.

[0055] In summary, the utility model can quickly realize the disassembly and installation of the inner cooling cylinder 10 by using the elastic locking mechanism 8, and in actual use, the inner cooling cylinder 10 or the outer cooling cylinder 9 can be switched and used quickly and conveniently, which is beneficial to cool and solidify cables with different specifications and lead sheath thicknesses, not only improves the utilization rate and production efficiency of the continuous lead extruding machine, but also makes the replacement process of the cooling cylinder more simple and convenient, and has stronger practicality and higher innovation.

[0056] The above is only a specific embodiment of the utility model, any feature disclosed in the specification can be replaced by other equivalent or similar purpose replacement features unless specifically described, and all features disclosed or steps in all methods or processes can be combined in any way except for mutually exclusive features and / or steps.

Claims

1. A cable lead sheath cooling device, characterized in that: The system includes an outer cooling cylinder (9), an inner cooling cylinder (10), and an elastic locking mechanism (8). The inner cooling cylinder (10) is fitted inside the outer cooling cylinder (9). Both the outer cooling cylinder (9) and the inner cooling cylinder (10) are provided with a jacketed water cavity (11). An outer nozzle (12) communicating with the jacketed water cavity (11) is fixed at the front end of the outer cooling cylinder (9), and an inner nozzle (13) communicating with the jacketed water cavity (11) is fixed at the front end of the inner cooling cylinder (10). The elastic locking mechanism (8) is provided with... Between the outer cooling cylinder (9) and the inner cooling cylinder (10); the inner cooling cylinder (10) has a locked state and an unlocked state that can be switched by rotation. In the unlocked state, the inner cooling cylinder (10) can move axially, and in the locked state, the inner cooling cylinder (10) is restricted from moving by the elastic locking mechanism (8); the cooling device can use the inner cooling cylinder (10) or the outer cooling cylinder (9) to cool and solidify the lead sheath of the cable by controlling the state switching of the inner cooling cylinder (10).

2. The cable lead sheath cooling device according to claim 1, characterized in that: Both the outer nozzle (12) and the inner nozzle (13) are provided with spray holes inclined toward the cable lead sheath, and the inclination angle of the spray hole on the inner nozzle (13) is 30 degrees, while the inclination angle of the spray hole on the outer nozzle (12) is 45 degrees.

3. The cable lead sheath cooling device according to claim 2, characterized in that: When the inner cooling cylinder (10) is in the locked state, the outer nozzle (12) of the outer cooling cylinder (9) is blocked by the inner cooling cylinder (10).

4. A cable lead sheath cooling device according to any one of claims 1-3, characterized in that: The elastic locking mechanism (8) includes a small handwheel (14), a locking ring (15), an elastic component (16), and a locking block (17). The locking block (17) is fixed to the outer surface of the rear of the inner cooling cylinder (10). The small handwheel (14) is fixed to the rear end of the outer cooling cylinder (9). The locking ring (15) is connected to the rear side of the small handwheel (14) through multiple sets of elastic components (16). The inner diameter of the small handwheel (14) is larger than the inner diameter of the outer cooling cylinder (9). The inner diameter of the locking ring (15) is located between the outer diameter of the inner cooling cylinder (10) and the inner diameter of the small handwheel (14). The locking ring (15) and the small handwheel (16) are connected to each other. 4) There is a locking gap (18) between them. The locking ring (15) is provided with a clearance notch (19) for the locking block (17) to pass through. The locking block (17) can move to the front of the locking ring (15) through the clearance notch (19). In the locked state, the locking block (17) and the clearance notch (19) are misaligned. The locking block (17) is located in the locking gap (18) and blocked by the locking ring (15). The inner cooling cylinder (10) cannot move. In the unlocked state, the locking block (17) is located in the clearance notch (19). The locking block (17) is disengaged from the locking gap (18). The inner cooling cylinder (10) can move axially.

5. A cable lead sheath cooling device according to claim 4, characterized in that: The elastic component (16) includes a positioning screw (21), a spacer nut (22), a washer (23), and a spring (24). The washer (23) and the spacer nut (22) are located on both sides of the locking ring (15). The positioning screw (21) passes through the washer (23), the locking ring (15), and the spacer nut (22) in sequence and is fixed on the small handwheel (14). The spring (24) is sleeved on the positioning screw (21) and located between the washer (23) and the locking ring (15). The locking ring (15) can be compressed and elastic under force, increasing the locking gap (18).

6. A cable lead sheath cooling device according to claim 4, characterized in that: The rear end of the outer cooling cylinder (9) is provided with an enlarged diameter section that communicates with the locking gap (18). The locking block (17) includes a locking part (25) and a positioning part (26) that are adapted to the locking gap (18) and the enlarged diameter section, respectively. The locking part (25) is integrally formed on the rear end of the positioning part (26) and protrudes from the outer surface of the positioning part (26). The elastic locking mechanism (8) fixes the inner cooling cylinder (10) through the locking ring (15) and the locking part (25).

7. A cable lead sheath cooling device according to claim 6, characterized in that: The locking part (25) is provided with an insertion ramp (27) for inserting into the locking gap (18) and a locking plane (28) for cooperating with the locking ring (15).

8. A cable lead sheath cooling device according to claim 4, characterized in that: A positioning block (31) is fixed on the outer surface of the rear part of the inner cooling cylinder (10). A positioning notch (30) adapted to the positioning block (31) is provided on the locking ring (15). The positioning block (31) enters the expansion section through the positioning notch (30).

9. A cable lead sheath cooling device according to claim 8, characterized in that: The number of locking blocks (17) and positioning blocks (31) are both two. The two locking blocks (17) and the two positioning blocks (31) are symmetrically arranged, and the adjacent locking blocks (17) and positioning blocks (31) are distributed at 90 degrees.

10. A cable lead sheath cooling device according to claim 1, characterized in that: The rear end of the outer cooling cylinder (9) and the rear end of the inner cooling cylinder (10) are both fixed with water inlet pipes (20) that communicate with the interlayer water cavity (11).

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