A cable insulation layer polishing and conical surface forming mechanism

Abstract

The present application relates to the technical field of cable processing, and particularly relates to a cable insulation layer polishing and taper surface forming mechanism. The mechanism comprises a shell, a rotating frame rotatably connected to the inner side of the shell, convex strips circumferentially and interval connected to the inner wall of the rotating frame, a mounting frame slidingly connected to the inner side of the rotating frame, and a one-groove circumferentially and interval provided on the mounting frame, wherein the convex strips are located in the one-groove, polishing blocks circumferentially and interval slidingly connected to the inner side of the mounting frame, a top block circumferentially and interval slidingly connected to the inner side of the mounting frame, and the top block is in contact with the polishing blocks, and a first spring with two ends respectively connected to the top block and the mounting frame. The rotating assembly drives the rotating frame and the mounting frame to rotate synchronously, and then drives the circumferentially arranged polishing blocks to uniformly cut and polish the end part of the cable insulation layer. The mechanism can replace the traditional manual operation, realize automatic taper surface forming, ensure the geometric consistency of the taper length and angle, and significantly improve the processing precision and operation efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of cable processing, and in particular to a mechanism for grinding and conical forming of cable insulation layers. Background Technology

[0002] In the fabrication of intermediate joints for 35kV and below power cables, the quality of the treatment of the cable insulation layer ends has a decisive impact on the electrical performance and long-term operational reliability of the entire joint. According to the current specifications for cable injection molding fusion splicing joints, the main insulation end must be precisely shaped into a "pencil tip" cone with a length of approximately 40mm, ensuring that the insulation surface is smooth, free of knife marks, and free of residual semi-conductive particles, while achieving a smooth transition between the outer semi-conductive layer and the insulation layer.

[0003] The aforementioned process requirements aim to prevent electric field concentration caused by geometric abrupt changes or surface defects, which could lead to partial discharge or even insulation breakdown. They are also crucial steps in ensuring the electrical equivalence of the insulation recovery layer after welding with the original cable structure. However, under current technological conditions, the aforementioned insulation layer conical forming and surface grinding processes primarily rely on manual operation. Workers typically use hand tools or simple grinding tools, which is not only labor-intensive and inefficient but also makes it difficult to guarantee the consistency of the conical geometry and the stability of the surface finish. Especially in space-constrained on-site environments or engineering scenarios with high process standards, manual operation is highly prone to problems such as insulation layer damage, semi-conductive layer residue, conical asymmetry, or uneven transitions, severely affecting the insulation performance and service life of the joint. Summary of the Invention

[0004] In view of this, the present invention provides a cable insulation layer grinding and conical surface forming mechanism, which can overcome the shortcomings of existing cable insulation layer grinding and conical surface forming that rely on manual operation, resulting in low efficiency, poor precision, unstable surface quality, easy damage to the insulation layer, and difficulty in ensuring the geometric consistency of the conical surface.

[0005] The technical implementation of the present invention is as follows: a cable insulation layer grinding and conical surface forming mechanism, comprising: a housing; a rotating frame rotatably connected to the inner side of the housing; a convex strip circumferentially spaced and connected to the inner wall of the rotating frame; a mounting frame slidably connected to the inner side of the rotating frame, and the mounting frame having a slot circumferentially spaced, with the convex strip located in the slot; a grinding block circumferentially spaced and slidably connected to the inner side of the mounting frame; a top block circumferentially spaced and slidably connected to the inner side of the mounting frame, and the top block and the grinding block engaging in contact; a first spring, with its two ends respectively connected to the top block and the mounting frame; a fixing component disposed on the mounting frame for fixing the mounting frame to the rotating frame; and a rotating component disposed on the housing for driving the rotating frame to rotate.

[0006] Furthermore, the fixing component includes: a connecting block, symmetrically connected to the side of the mounting frame; a locking plate, slidably connected to the connecting block, with evenly spaced slots on the protrusions, the end of the locking plate being locked in the slots; and a second spring, with its two ends connected to the locking plate and the connecting block respectively.

[0007] Furthermore, the rotating assembly includes: a drive motor mounted on the outer wall of the housing; a drive gear connected to the output shaft of the drive motor; and a driven gear rotatably connected to the housing, the driven gear meshing with the drive gear, and toothed holes spaced apart circumferentially on the outer wall of the rotating frame, the driven gear meshing with the toothed holes.

[0008] Furthermore, it also includes: a slider, with grooves spaced apart on the housing, the slider being slidably connected to the grooves; a sliding square rod, slidably connected to the slider; an arc-shaped plate, connected to one end of the sliding square rod; and a moving component, disposed on the housing, for driving the sliding square rod to move.

[0009] Furthermore, the moving component includes: a rotating ring, sleeved on the outside of the housing, with arc-shaped holes spaced apart on the rotating ring; a short rod, connected to the other end of the sliding square rod, with the short rod located inside the arc-shaped holes; and a locking mechanism, disposed on the rotating ring, for locking the position of the rotating ring.

[0010] Furthermore, the locking mechanism includes: a locking rod, which is slidably connected to the rotating ring, and the outer wall of the housing is provided with locking grooves spaced apart, with the end of the locking rod being engaged in the locking groove; and a connecting spring, with its two ends connected to the locking rod and the rotating ring respectively.

[0011] Furthermore, the end face of the locking rod that is engaged in the locking groove is inclined, and the inner wall of the locking groove is also inclined.

[0012] Furthermore, it also includes: a protective shell connected to the outer wall of the shell, and the drive motor, the driving gear and the driven gear are all located inside the protective shell.

[0013] Furthermore, the protective shell has multiple ventilation holes spaced apart on its sides.

[0014] Furthermore, the inner wall of the mounting frame is conical in shape.

[0015] The present invention has the following advantages: 1. The present invention drives the rotating frame and the mounting frame to rotate synchronously through the rotating component, thereby driving the circumferentially arranged grinding blocks to uniformly cut and grind the ends of the cable insulation layer. This mechanism can replace traditional manual operation, realize automated conical surface forming, ensure the geometric consistency of the length and angle of the conical surface, and significantly improve processing accuracy and work efficiency.

[0016] 2. When the grinding block of the present invention comes into contact with the cable insulation layer, the grinding block can adaptively move outward with the outer diameter of the insulation layer and maintain constant pressure. This combination allows the grinding process to closely fit the surface of the insulation layer, achieving a smooth and scratch-free grinding effect, while avoiding damage to the insulation layer caused by excessive pressure or rigid contact of the tool, effectively ensuring the smoothness and integrity of the insulation surface.

[0017] 3. The present invention enables quick assembly and disassembly of the mounting frame on the rotating frame through the function of the fixing component, which facilitates the replacement of worn grinding blocks. At the same time, by controlling the rotation of the rotating ring, the three arc-shaped plates can be driven to move synchronously towards the center, clamping and centering the cable insulation layer, ensuring that the shell and the cable are coaxial, thereby avoiding displacement during subsequent grinding, ensuring the symmetry and smoothness of the conical surface forming, and improving the stability and reliability of the operation. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the separation structure of the rotating frame and the mounting frame of the present invention.

[0020] Figure 3 This is a cross-sectional view of the mounting frame of the present invention.

[0021] Figure 4 This is a schematic diagram of the installation of the fixing component of the present invention.

[0022] Figure 5 For the present invention Figure 4 Enlarged view of part A.

[0023] Figure 6 This is a schematic diagram of the installation of the rotating component of the present invention.

[0024] Figure 7 This is a schematic diagram showing the specific structure of the slider, sliding square rod, arc plate, and moving component of the present invention.

[0025] Figure 8 This is a schematic diagram of the specific structure of the locking groove on the housing of the present invention.

[0026] The meanings of the reference numerals in the figure are as follows: 1-Housing, 2-Rotating frame, 201-Raised strip, 3-Mounting frame, 301-Slot, 4-Grinding block, 5-Top block, 6-First spring, 7-Connecting block, 8-Clamping plate, 9-Second spring, 10-Clamping slot, 11-Drive motor, 12-Driving gear, 13-Driven gear, 14-Tooth hole, 15-Slide groove, 16-Slider, 17-Sliding square rod, 18-Arc plate, 19-Rotating ring, 1901-Arc hole, 20-Short rod, 21-Locking rod, 22-Connecting spring, 23-Locking groove, 24-Protective shell. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings.

[0028] A cable insulation layer grinding and conical surface forming mechanism, such as Figures 1-6 As shown, the assembly includes a housing 1, a rotating frame 2, protrusions 201, a mounting frame 3, a grinding block 4, a top block 5, a first spring 6, a fixing assembly, and a rotating assembly. The rotating frame 2 is rotatably connected to the inner right side of the housing 1. Multiple protrusions 201 are circumferentially spaced on the inner wall of the rotating frame 2. The mounting frame 3 is located inside the rotating frame 2, and slots 301 are circumferentially spaced on the mounting frame 3. The protrusions 201 are located within the slots 301, allowing the mounting frame 3 to move axially along the rotating frame 2, and the rotating frame 2 to drive the mounting frame 3. The mounting frame 3 rotates synchronously. The inner wall of the mounting frame 3 is conical. Multiple grinding blocks 4 are slidably installed on the inner side of the mounting frame 3 at intervals. The grinding blocks 4 are inclined and slightly protrude from the inner wall of the mounting frame 3. Multiple top blocks 5 are slidably connected to the inner side of the mounting frame 3 at intervals. The top blocks 5 correspond one-to-one with the grinding blocks 4 and are in contact with each other. A first spring 6 is connected between the top blocks 5 and the mounting frame 3. The mounting frame 3 is provided with a fixing component for fixing itself to the rotating frame 2. The housing 1 is provided with a rotating component for driving the rotating frame 2 to rotate.

[0029] like Figure 4 and Figure 5 As shown, the fixing component includes a connecting block 7, a clamping plate 8, and a second spring 9. Two sets of connecting blocks 7 are symmetrically connected front and back on the right side of the mounting frame 3. There are two connecting blocks 7 in each set. A clamping plate 8 is slidably connected between the two connecting blocks 7 in the same set. The clamping plate 8 is L-shaped, and a second spring 9 is connected between the clamping plate 8 and one of the connecting blocks 7. The right end of the protrusion 201 is provided with a slot 10 spaced apart, and the end of the clamping plate 8 is clamped in the slot 10.

[0030] like Figure 6 As shown, the rotating assembly includes a drive motor 11, a drive gear 12, and a driven gear 13. The drive motor 11 is mounted on the rear right side of the housing 1. The drive gear 12 is connected to the output shaft of the drive motor 11. The driven gear 13 is also rotatably connected to the rear right side of the housing 1. The driven gear 13 meshes with the drive gear 12. The outer left side of the rotating frame 2 has circumferentially spaced toothed holes 14, and the driven gear 13 meshes with the toothed holes 14.

[0031] When grinding is required on the end face of the cable insulation layer, the operator first places the housing 1 onto the end of the cable insulation layer, allowing the end of the cable insulation layer to pass through the inner side of the mounting frame 3. When the end of the cable insulation layer contacts the grinding block 4, the grinding block 4 is pressed outward, pushing the corresponding top block 5 outward, thus compressing the first spring 6. Under the elastic force of the first spring 6, the grinding block 4 can always remain in close contact with the surface of the cable insulation layer to be processed. Subsequently, the drive motor 11 is started, which drives the drive gear 12 to rotate. The drive gear 12 drives the driven gear meshing with it. The driven gear 13 rotates, driving the rotating frame 2 to rotate through the meshing toothed hole 14. The rotating frame 2 drives the mounting frame 3 to rotate synchronously through the engagement of the protrusion 201 on its inner wall with the slot 301 on the mounting frame 3. The mounting frame 3 drives the grinding blocks 4 arranged circumferentially on its inner side to rotate together, thereby grinding the end of the cable insulation layer. During the grinding process, the operator needs to continuously push the housing 1 along the cable axis towards the insulation layer until the end face of the cable insulation layer is processed into the specified conical shape. After the grinding is completed, the drive motor 11 is turned off, and then the housing 1 is pushed along the cable... The grinding block 4 is moved axially away from the insulation layer, causing it to disengage from the cable insulation layer. At this time, the first spring 6 returns to its original state, pushing the top block 5 to move inward and reset. The top block 5 then pushes the grinding block 4 back to its initial position. Because the grinding block 4 has a certain radial travel, even if it wears out due to long-term use, it can still maintain contact with the surface of the insulation layer under the action of the spring, thus ensuring the stability of the grinding effect. When the grinding block 4 needs to be replaced, the operator can press the clamping plates 8 on both sides towards the middle, causing the second spring 9 to be stretched. The end of the clamping plate 8 will then be pushed off the protrusion 201. The mounting frame 3 is released from the slot 10, thus releasing the axial fixation of the mounting frame 3. Then, the mounting frame 3 is pulled to the right, so that the protrusion 201 is removed from the slot 301, and the mounting frame 3 can be removed from the rotating frame 2. Then, the worn grinding block 4 can be replaced. After the replacement is completed, the mounting frame 3 is reinstalled into the rotating frame 2, ensuring that the protrusion 201 is aligned with the slot 301 and inserted into place. Then, the retaining plate 8 is released, the second spring 9 returns to its original state, and drives the retaining plates 8 on both sides to reset outward, so that the ends of the retaining plates 8 are re-engaged into the corresponding slots 10, thus achieving reliable fixation of the mounting frame 3 on the rotating frame 2.

[0032] like Figure 1 , Figure 7 and Figure 8As shown, it also includes a slider 16, a sliding square rod 17, an arc plate 18, and a moving assembly. Three grooves 15 are circumferentially spaced on the left side of the housing 1, and sliders 16 are slidably connected to each of the three grooves 15. Sliding square rods 17 are slidably connected to the sliders 16, and arc plates 18 are connected to the opposite ends of the three sliding square rods 17. A moving assembly for driving the sliding square rods 17 to move is provided on the housing 1. The moving assembly includes a rotating ring 19, a short rod 20, and a locking mechanism. A rotating ring 19 is fitted onto the outer left side of the housing 1, and the rotating ring 19 has three arc-shaped holes circumferentially spaced. 1901, each of the three sliding square rods 17 has a short rod 20 connected to one end facing away from the other, and the short rod 20 is located in the arc-shaped hole 1901. The rotating ring 19 is provided with a locking mechanism for locking its own position. The locking mechanism includes a locking rod 21 and a connecting spring 22. The upper part of the rotating ring 19 is slidably connected to the locking rod 21. The lower end of the locking rod 21 is inclined. The rear left side of the housing 1 is provided with multiple locking grooves 23 spaced apart. The front side of the inner wall of the locking groove 23 is inclined, and the lower end of the locking rod 21 is stuck in the locking groove 23. The locking rod 21 and the rotating ring 19 are connected by a connecting spring 22.

[0033] After the operator places the housing 1 onto the end of the cable insulation layer, the rotating ring 19 can be rotated counterclockwise around the axis of the housing 1. During its rotation, the arc-shaped hole 1901 on the rotating ring 19 pushes the short rod 20 towards the center (inner side) of the housing 1. The short rod 20 drives the connected sliding square rod 17 and the arc-shaped plate 18 installed at its end to move inward simultaneously. At the same time, the rotating ring 19 drives the locking rod 21 installed on it to rotate counterclockwise. When the lower inclined surface of the locking rod 21 contacts the corresponding inclined surface of the locking groove 23 opened on the outer wall of the housing 1, the locking rod 21 is pushed upward under the interaction of the inclined surfaces, and the connecting spring 22 is compressed accordingly. During this process, the inclined structure of the locking groove 23 allows the locking rod 21 to pass smoothly without affecting the continued counterclockwise rotation of the rotating ring 19. When the rotating ring 19 rotates until all three arc-shaped plates 18 are in contact with and clamped to the outer surface of the cable insulation layer, the arc-shaped plates 18 achieve the positioning and straightening function of the cable, assisting in the positioning and straightening of the cable. The housing 1 automatically maintains coaxiality with the cable insulation layer, thereby ensuring the positioning accuracy of subsequent grinding operations and preventing axial deviation. At this time, since the rotating ring 19 stops rotating, the locking rod 21 moves downward under the restoring force of the connecting spring 22, and its lower end is engaged in the corresponding locking groove 23. The vertical structure of the locking groove 23 can prevent the locking rod 21 from rotating clockwise, thereby locking the rotating ring 19 in the current position and effectively preventing it from accidentally reversing during operation. During the subsequent grinding process, the operator needs to continuously push the housing 1 along the cable axis towards the insulation layer. Since the three arc plates 18 are already in clamping contact with the outer surface of the cable insulation layer, the slider 16, the sliding square rod 17 and the arc plate 18 are stationary relative to the cable. The continued advancement of the housing 1 is achieved through the relative sliding of the sliding groove 15 and the slider 16. The slider 16 slides in the sliding groove 15, thereby ensuring that the axial feed movement of the housing 1 is not hindered by the positioning structure of the arc plate 18.

[0034] like Figure 1 As shown, it also includes a protective shell 24. The protective shell 24 is connected to the rear right side of the housing 1. The drive motor 11, the driving gear 12 and the driven gear 13 are all housed inside the protective shell 24. The protective shell 24 provides mechanical protection for the above-mentioned transmission components to prevent the intrusion of external foreign objects or accidental contact by operators.

[0035] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A mechanism for grinding and conical forming of cable insulation layer, characterized in that, include: Shell (1); Rotate frame (2), which is rotatably connected to the inside of housing (1); The convex strip (201) is circumferentially spaced and connected to the inner wall of the rotating frame (2); The mounting frame (3) is slidably connected to the inner side of the rotating frame (2), and the mounting frame (3) has a groove (301) spaced out in the circumferential direction, with the protrusion (201) located in the groove (301); The grinding block (4) is circumferentially spaced and slidably connected to the inside of the mounting frame (3); The top block (5) is circumferentially slidably connected to the inner side of the mounting frame (3), and the top block (5) is in contact with the grinding block (4); The first spring (6) is connected to the top block (5) and the mounting frame (3) at both ends respectively; A fixing component is provided on the mounting frame (3) for fixing the mounting frame (3) to the rotating frame (2); A rotating component is mounted on the housing (1) and is used to drive the rotating frame (2) to rotate.

2. The cable insulation layer grinding and conical surface forming mechanism according to claim 1, characterized in that, The fixed components include: Connecting blocks (7) are symmetrically connected to the sides of the mounting frame (3); The card plate (8) is slidably connected to the connecting block (7), and the protrusion (201) is evenly spaced with slots (10), and the end of the card plate (8) is locked in the slot (10); The second spring (9) is connected to the card plate (8) and the connecting block (7) at both ends respectively.

3. The cable insulation layer grinding and conical surface forming mechanism according to claim 1, characterized in that, The rotating assembly includes: A drive motor (11) is mounted on the outer wall of the housing (1); The drive gear (12) is connected to the output shaft of the drive motor (11); Driven gear (13) is rotatably connected to housing (1). Driven gear (13) meshes with driving gear (12). The outer wall of rotating frame (2) is circumferentially spaced with toothed holes (14). Driven gear (13) meshes with toothed holes (14).

4. The cable insulation layer grinding and conical surface forming mechanism according to claim 1, characterized in that, It also includes: The slider (16) has a groove (15) spaced apart on the housing (1), and the slider (16) is slidably connected in the groove (15); The sliding square rod (17) is slidably connected to the slider (16); An arc-shaped plate (18) is connected to one end of a sliding square rod (17); A movable component, mounted on the housing (1), is used to drive the sliding square rod (17) to move.

5. The cable insulation layer grinding and conical surface forming mechanism according to claim 4, characterized in that, The mobile components include: A rotating ring (19) is fitted on the outside of the housing (1), and an arc-shaped hole (1901) is spaced apart on the rotating ring (19). A short rod (20) is connected to the other end of the sliding square rod (17), and the short rod (20) is located inside the arc-shaped hole (1901); A locking mechanism is provided on the rotating ring (19) to lock the position of the rotating ring (19).

6. The cable insulation layer grinding and conical surface forming mechanism according to claim 5, characterized in that, The locking mechanism includes: The locking rod (21) is slidably connected to the rotating ring (19), and the outer wall of the housing (1) is provided with locking grooves (23) spaced apart, and the end of the locking rod (21) is stuck in the locking groove (23); Connecting spring (22), with locking rod (21) and rotating ring (19) connected to both ends respectively.

7. The cable insulation layer grinding and conical surface forming mechanism according to claim 6, characterized in that: The end face of the locking rod (21) that is stuck in the locking groove (23) is inclined, and the inner wall of the locking groove (23) is also inclined.

8. The cable insulation layer grinding and conical surface forming mechanism according to claim 3, characterized in that, It also includes: The protective shell (24) is connected to the outer wall of the housing (1), and the drive motor (11), the driving gear (12) and the driven gear (13) are all located inside the protective shell (24).

9. The cable insulation layer grinding and conical surface forming mechanism according to claim 8, characterized in that: The protective shell (24) has multiple heat dissipation holes spaced apart on its side.

10. The cable insulation layer grinding and conical surface forming mechanism according to claim 1, characterized in that: The inner wall of the mounting frame (3) is conical.

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