A device for manufacturing and forming prefabricated insulation sheath for power grid

Abstract

The present invention belongs to the technical field of electric power equipment, and specifically relates to a device for manufacturing and forming a prefabricated insulating sheath for a power grid, comprising a base plate, an extrusion mechanism installed on the base plate, and a cooling mechanism and a cutting mechanism installed in sequence behind the extrusion mechanism on the base plate. After the extrusion mechanism of the present invention extrude the raw material in a molten state, the raw material will not be directly formed, but will form a ring-shaped extrudate with protrusions at the edge. The present invention uses a cooling mechanism to quickly cool the extrudate so that the extrudate maintains a fixed shape, and finally uses a cutting mechanism to cut the protruding position at the edge of the extrudate. Since the cut position has been cooled and shaped during the cutting process, the buckle structure formed after cutting will not be deformed, thereby ensuring the stable buckle of the buckle structure and improving the performance of the insulating sheath. The cooling mechanism of the present invention realizes the recycling of cooling water in the process of cooling the extrudate by cooling water and improves the speed of shaping the extrudate.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment, and in particular relates to a device for manufacturing and forming a prefabricated insulating sheath of a power grid. Background Art

[0002] Insulation sheaths are essential insulating safety protection devices for the wiring terminals of power equipment such as transformers, lightning arresters, and outdoor switches. The materials used can be divided into three categories: rubber-plastic insulation, heat-shrink insulation, and silicone insulation. Silicone insulation is made by high-temperature vulcanization of synthetic silicone rubber. It inherits the excellent properties of rubber itself, such as insulation, flexibility, hydrophobicity, high and low temperature resistance, and UV aging resistance. The vulcanization process also gives it advantages such as the ability to fix its shape as required, increased flame retardancy, and increased color change, thus making silicone insulation materials more widely applicable. The snap-on structure used in silicone insulation sheaths allows them to be installed without disassembling the equipment, and can be reassembled and re-used when needed.

[0003] Currently, in the production process of silicone insulating sheaths, the raw materials are usually directly extruded into shape, and then the formed insulating sheaths are cooled. Due to the presence of a buckle structure in the insulating sheath, its edge shape is relatively complex. The shape of the insulating sheath is easily deformed after direct extrusion, which makes it difficult for the buckle structures at both ends of the insulating sheath to achieve a stable buckle connection, which has an adverse effect on the performance of the insulating sheath. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a prefabricated insulating sheath production and molding device for a power grid, comprising a base plate, an extrusion mechanism installed on the base plate, the extrusion mechanism comprising a plurality of legs fixedly mounted on the base plate, a storage box installed on the top of the plurality of legs, a feed pipe installed on the top of the storage box, and an extrusion block fixedly mounted on the rear end surface of the storage box; a cooling mechanism and a cutting mechanism are sequentially installed on the base plate behind the extrusion mechanism.

[0005] The cooling mechanism includes a first water tank fixedly mounted on the base plate, the top of the first water tank is open, and a plurality of brackets are mounted on the base plate, and a first mounting bracket located above the first water tank is commonly mounted on the ends of the plurality of brackets, a horizontal second water tank is mounted on the first mounting bracket, and a plurality of water outlets connected to the interior of the second water tank are evenly fixedly mounted on the bottom of the second water tank along the front-to-back direction; a plurality of second mounting brackets are evenly fixedly mounted on the base plate on one side of the first water tank along the front-to-back direction, a pipe sleeve and a water pump are fixedly mounted on each second mounting bracket, an inverted L-shaped pipe is fixedly mounted on the pipe sleeve, and both ends of the L-shaped pipe are respectively connected to the first water tank and the corresponding water pump, and the water pump is used to supply water to the second water tank.

[0006] The cutting mechanism includes a forming frame fixedly mounted on the base plate, a cutting support plate fixedly mounted on the base plate at a position behind the forming frame, a knife holder arranged in the front-to-back direction is horizontally fixedly mounted on the front end surface of the cutting support plate, and a cutting blade is fixedly mounted on the front end surface of the knife holder; a vertical plate arranged in the front-to-back direction is fixedly mounted on the front end surface of the cutting support plate, and internal support components are mounted on the top and bottom surfaces of the vertical plate; the cutting mechanism also includes a pulling component for pulling the insulating sheath after cutting.

[0007] As a preferred technical solution of the present invention, the second water tank is rotatably matched with the first mounting bracket, a rotating shaft passing through the first mounting bracket is fixedly installed at the end of the second water tank, a driven gear is fixedly installed at the end of the rotating shaft, and a torsion spring is installed between the driven gear and the first mounting bracket; a cooling motor is fixedly installed on the first mounting bracket through a motor seat, and a sector gear meshing with the driven gear is fixedly installed on the output shaft of the cooling motor.

[0008] As a preferred technical solution of the present invention, a third water tank is fixedly installed on the first mounting frame, and the bottom of the third water tank is connected to the second water tank through a hose; a water pump supplies water to the third water tank.

[0009] As a preferred technical solution of the present invention, a water inlet pipe is fixedly installed at the position corresponding to each water pump on the top of the third water tank, and the water inlet pipe is trumpet-shaped with a larger top and a smaller bottom; the second mounting bracket is fixedly installed with a third mounting bracket, and the third mounting bracket is fixedly installed with a hemispherical block corresponding to the water pump outlet position.

[0010] As a preferred technical solution of the present invention, a connecting plate is fixedly installed at the bottom of the first water tank, and an arc-shaped plate with an upward opening is fixedly installed on the top of the connecting plate. The arc-shaped plates are arranged along the front and rear directions and arc-shaped bars are fixedly installed at both front and rear ends of the arc-shaped plates.

[0011] As a preferred technical solution of the present invention, two water baffles are fixedly installed on the inner wall of the first water tank, a filter plate is fixedly installed between the two water baffles, and the bottom end of the L-shaped tube is located within the range surrounded by the filter plate, the two water baffles and the inner wall of the first water tank.

[0012] As a preferred technical solution of the present invention, the internal support assembly includes several internal support rods fixedly installed on the vertical plate, the several internal support rods are arranged along the front-to-back direction and the height of the internal support rods gradually increases from front to back; the internal support rods are round rods and the end edges of the internal support rods are rounded.

[0013] As a preferred technical solution of the present invention, a shaping block cooperating with the cutting blade is fixedly mounted on the front end surface of the cutting support plate via a plurality of connecting rods.

[0014] As a preferred technical solution of the present invention, the pulling assembly includes a pulling support plate vertically fixedly mounted on the base plate and located on one side of the vertical plate, and a roller frame is installed on the surface of the pulling support plate facing the vertical plate corresponding to the position of each inner support assembly, and a vertical pulling roller is rotatably installed on the roller frame; a pulling motor for driving the pulling roller to rotate is fixedly installed on one of the roller frames, and the upper and lower pulling rollers are connected together by a connecting shaft; a vertical driven roller is rotatably installed on the surface of the pulling support plate facing the vertical plate corresponding to the position of each pulling roller.

[0015] As a preferred technical solution of the present invention, a cross-shaped inner support frame is horizontally fixedly installed on the front end surface of the vertical plate.

[0016] The present invention has at least the following beneficial effects: (1) After the extrusion mechanism of the present invention extrude the soft raw material, the raw material will not directly become the shape of the insulating sheath, but will form a ring-shaped extrudate with protrusions at the edge. The present invention quickly cools the extrudate through the cooling mechanism so that the extrudate maintains a fixed shape, and finally cuts the protruding position at the edge of the extrudate through the cutting mechanism. Since the cut position has been cooled and shaped during the cutting process, the buckle structure formed after cutting will not be deformed, thereby ensuring the stable buckle of the buckle structure and improving the performance of the insulating sheath.

[0017] (2) The cooling mechanism of the present invention realizes the recycling of cooling water in the process of cooling the extrudate by cooling water, thereby saving water resources; during the cooling process, the second water tank drives the water outlet to swing back and forth, so that the cooling water can be evenly sprayed on the surface of the upper half of the extrudate, and the cooling water is collected by the cooperation of the arc plate and the arc strip, so that the cooling water can also contact the lower half of the extrudate, thereby cooling the surface of the lower half of the extrudate and improving the cooling effect; since the temperature of the cooling water itself will increase after contacting the extrudate, the present invention uses the blocking effect of the hemispherical block to allow the water sprayed by the water pump to diffuse to the surroundings, thereby increasing the contact time between the water and the air, thereby improving the heat dissipation effect of the water, ensuring that the water entering the second water tank is cooling water, and further ensuring the cooling effect on the extrudate and improving the speed of the extrudate shaping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and examples.

[0019] Figure 1 This is a first three-dimensional structural diagram of a device for forming a prefabricated insulating sheath for a power grid according to an embodiment of the present invention.

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of point A in the middle.

[0021] Figure 3This is a second three-dimensional structural diagram of the device for manufacturing and forming a prefabricated insulating sheath for a power grid according to an embodiment of the present invention.

[0022] Figure 4 for Figure 3 Enlarged schematic diagram of point B in the middle.

[0023] Figure 5 for Figure 3 Enlarged schematic diagram of point C in the middle.

[0024] Figure 6 Schematic diagram of the structure of the water pump outlet and the hemispherical block in an embodiment of the present invention.

[0025] Figure 7 Schematic diagram of the structure of the curved plate and the curved strip in an embodiment of the present invention.

[0026] In the figure: 1. Base plate; 2. Extrusion mechanism; 201. Storage box; 202. Feed pipe; 203. Extrusion block; 3. Cooling mechanism; 301. First water tank; 302. First mounting bracket; 303. Second water tank; 304. Water outlet; 305. Second mounting bracket; 306. Pipe sleeve; 307. Water pump; 308. L-shaped pipe; 309. Rotating shaft; 310. Driven gear; 311. Torsion spring; 312. Cooling motor; 313. Sector gear; 314. Third water tank; 315. Hose; 316. Water inlet pipe; 317 , the third mounting frame; 318, hemispherical block; 319, connecting plate; 320, curved plate; 321, curved strip; 322, water retaining plate; 323, filter plate; 4, cutting mechanism; 401, shaping frame; 402, cutting support plate; 403, knife holder; 404, cutting blade; 405, vertical plate; 406, inner support rod; 407, connecting rod; 408, shaping block; 409, pulling support plate; 410, roller frame; 411, pulling roller; 412, pulling motor; 413, connecting shaft; 414, driven roller; 415, inner support frame. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0028] like Figure 1As shown, this embodiment provides a prefabricated insulating sheath manufacturing and forming device for a power grid, comprising a base plate 1, an extrusion mechanism 2 is installed on the base plate 1, the extrusion mechanism 2 comprises a plurality of legs fixedly installed on the base plate 1, a storage box 201 is installed on the top of the plurality of legs, a feed pipe 202 is installed on the top of the storage box 201, and an extrusion block 203 is fixedly installed on the rear end face of the storage box 201; a cooling mechanism 3 and a cutting mechanism 4 are sequentially installed on the base plate 1 behind the extrusion mechanism 2; the soft raw material enters the storage box 201 through the feed pipe 202 and is extruded from the extrusion block 203, the extrudate is annular and there are protrusions on the surface of the extrudate; the extrudate is quickly cooled by the cooling mechanism 3 to shape the extrudate, and then the protrusions on the extrudate are cut by the cutting mechanism 4 to cut the extrudate into the shape of the insulating sheath.

[0029] See Figure 1 、 Figure 2 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7The cooling mechanism 3 includes a first water tank 301 fixedly mounted on the bottom plate 1. The top of the first water tank 301 is open. Several brackets are installed on the bottom plate 1. The ends of the several brackets are commonly installed with a first mounting frame 302 located above the first water tank 301. A horizontal second water tank 303 is installed on the first mounting frame 302. Several water outlets 304 communicating with the interior of the second water tank 303 are evenly fixedly mounted on the bottom of the second water tank 303 along the front-to-back direction; several second mounting frames 305 are evenly fixedly mounted on the bottom plate 1 on one side of the first water tank 301 along the front-to-back direction. Each second mounting frame 305 A pipe sleeve 306 and a water pump 307 are fixedly installed on each of them. An inverted L-shaped pipe 308 is fixedly installed on the pipe sleeve 306. The two ends of the L-shaped pipe 308 are respectively connected to the first water tank 301 and the corresponding water pump 307. The water pump 307 is used to supply water to the second water tank 303; the second water tank 303 is rotatably matched with the first mounting bracket 302. A rotating shaft 309 that passes through the first mounting bracket 302 is fixedly installed at the end of the second water tank 303. A driven gear 310 is fixedly installed at the end of the rotating shaft 309. A torsion spring 311 is installed between the driven gear 310 and the first mounting bracket 302. A cooling motor 312 is fixedly installed on the motor base, and a sector gear 313 meshing with the driven gear 310 is fixedly installed on the output shaft of the cooling motor 312; a third water tank 314 is fixedly installed on the first mounting bracket 302, and the bottom of the third water tank 314 is connected to the second water tank 303 through a hose 315; a water pump 307 supplies water to the third water tank 314; a water inlet pipe 316 is fixedly installed on the top of the third water tank 314 corresponding to the position of each water pump 307, and the water inlet pipe 316 is a trumpet-shaped one with a larger top and a smaller bottom; a third mounting bracket 317 is fixedly installed on the second mounting bracket 305, and the third mounting bracket 317 A hemispherical block 318 corresponding to the outlet position of the water pump 307 is fixedly installed on the top; a connecting plate 319 is fixedly installed on the bottom of the first water tank 301, and an arc-shaped plate 320 with an upward opening is fixedly installed on the top of the connecting plate 319. The arc-shaped plates 320 are arranged along the front-to-back direction and arc-shaped bars 321 are fixedly installed at the front and rear ends of the arc-shaped plates 320; two water baffles 322 are fixedly installed on the inner wall of the first water tank 301, and a filter plate 323 is fixedly installed between the two water baffles 322. The bottom ends of the L-shaped tubes 308 are located in the range surrounded by the filter plates 323, the two water baffles 322 and the inner wall of the first water tank 301.

[0030] During operation, cooling water is stored in the first water tank 301. The water is drawn from the first water tank 301 by the water pump 307 through the L-shaped tube 308. The water in the first water tank 301 contacts the hemispherical block 318 through the outlet of the water pump 307. Since an annular channel is formed between the hemispherical block 318 and the outlet of the water pump 307, the water is sprayed out from the annular channel. The water leaving the water pump 307 flows downward in an umbrella shape along the surface of the hemispherical block 318 and falls into the water inlet pipe 316. In this process, the water is fully in contact with the air, thereby The temperature of the water entering the water inlet pipe 316 is lower, which improves the cooling effect of water on the extrudate; the water in the water inlet pipe 316 enters the third water tank 314 and then enters the second water tank 303 through the hose 315, and finally falls from the water outlet 304. During the falling process, the water contacts the surface of the extrudate and flows downward along the surface of the extrudate to cool the extrudate; in the above process, the cooling motor 312 always drives the sector gear 313 to rotate continuously, and the sector gear 313 periodically meshes with the driven gear 310, and the driven gear Under the joint action of the sector gear 313 and the torsion spring 311, the rotating shaft 309, the second water tank 303 and the water outlet 304 are driven to swing back and forth, ensuring that the water falling from the water outlet 304 is in uniform contact with the surface of the extrudate, thereby improving the cooling effect; it should be noted that when the sector gear 313 is disengaged from the driven gear 310, the water outlet 304 is not in a vertical downward state, but is tilted to one side, thereby ensuring that the swing path of the water outlet 304 is symmetrical on the left and right, thereby improving the cooling effect. The uniformity of cooling is ensured; the water in contact with the surface of the extrudate flows along the surface of the upper half of the extrudate, separates from the extrudate and drips onto the curved plate 320. The curved plate 320 and the curved strip 321 jointly collect the dripping water, and the collected water gradually overflows and eventually falls into the first water tank 301. During the overflow process, the water contacts the lower half of the surface of the extrudate, further improving the cooling effect on the extrudate; during the process of the water in the first water tank 301 flowing toward the bottom end of the L-shaped tube 308, the filter plate 323 filters the water.

[0031] like Figure 1 、 Figure 3 and Figure 4As shown, the cutting mechanism 4 includes a shaping frame 401 fixedly mounted on the base plate 1, a cutting support plate 402 is fixedly mounted on the base plate 1 at a position behind the shaping frame 401, a knife holder 403 arranged in the front-to-back direction is fixedly mounted horizontally on the front end surface of the cutting support plate 402, and a cutting blade 404 is fixedly mounted on the front end surface of the knife holder 403; a vertical plate 405 arranged in the front-to-back direction is fixedly mounted on the front end surface of the cutting support plate 402, an inner support assembly is mounted on the top and bottom surfaces of the vertical plate 405, and a cross-shaped inner support frame 415 is fixedly mounted horizontally on the front end surface of the vertical plate 405; the inner support assembly includes a plurality of inner support rods 406 fixedly mounted on the vertical plate 405, the plurality of inner support rods 406 are arranged in the front-to-back direction and the height of the inner support rods 406 gradually increases from front to back; the inner support rods 406 are round rods and the end edges of the inner support rods 406 are rounded; A shaping block 408 cooperating with the cutting blade 404 is fixedly installed on the front end surface of the cutting support plate 402 through several connecting rods 407; the cutting mechanism 4 also includes a pulling assembly for pulling the cut insulating sheath, and the pulling assembly includes a pulling support plate 409 vertically fixedly installed on the base plate 1 and located on one side of the vertical plate 405, and a roller frame 410 is installed on the surface of the pulling support plate 409 facing the vertical plate 405 corresponding to the position of each inner support assembly, and a vertical pulling roller 411 is rotatably installed on the roller frame 410; a pulling motor 412 for driving the pulling roller 411 to rotate is fixedly installed on one of the roller frames 410, and the upper and lower pulling rollers 411 are connected together by a connecting shaft 413; a vertical driven roller 414 is rotatably installed on the surface of the pulling support plate 409 facing the vertical plate 405 corresponding to the position of each pulling roller 411.

[0032] The extrudate cooled by the cooling mechanism 3 has been shaped, and the extrudate is supported by the shaping frame 401, which ensures that the extrudate will not be deformed during the cutting process, and also ensures that the extrudate remains in a horizontal state during the cooling process; the insulating sheath after cutting is pulled by the pulling component to drive the insulating sheath to move horizontally as a whole. During this process, the raised part of the surface of the extrudate enters the shaping block 408 and remains in a shaped state under the action of the shaping block 408. The cutting blade 404 cuts the raised part of the surface of the extrudate, and the annular extrudate is disconnected from the raised position after cutting. The raised position forms a mutually fitting buckle structure after cutting; during the cutting process, the inner support frame 415 supports the annular inner wall of the extrudate, further ensuring that the shape of the extrudate remains unchanged during cutting; the insulating sheath formed after cutting still remains annular until the inner wall of the insulating sheath is aligned with the The inner support rods 406 are in contact, and as the insulating sheath continues to move horizontally, each inner support rod 406 contacts the inner wall of the insulating sheath in turn and stretches the insulating sheath. The raised part of the insulating sheath separates from the shaping block 408 and then separates up and down along the cutting line; the gradually stretched insulating sheath enters between the pulling roller 411 and the driven roller 414 and is squeezed by the two. The pulling motor 412 provides power, and the connecting shaft 413 plays a synchronizing role, so that the two pulling rollers 411 rotate synchronously. During the rotation of the pulling roller 411, a horizontal force is applied to the insulating sheath, so that the insulating sheath continues to move in the horizontal direction; it should be noted that this embodiment is aimed at a continuous production process. In the initial state, it is necessary to manually insert the cut insulating sheath between the pulling roller 411 and the driven roller 414. After the processing starts, the pulling assembly can be used to transport the insulating sheath horizontally.

[0033] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A device for manufacturing and forming a prefabricated insulating sheath for a power grid, comprising a base plate, an extrusion mechanism mounted on the base plate, the extrusion mechanism comprising a plurality of legs fixedly mounted on the base plate, a material storage box mounted on top of the plurality of legs, a feed pipe mounted on top of the material storage box, and an extrusion block fixedly mounted on the rear end surface of the material storage box; characterized in that: A cooling mechanism and a cutting mechanism are sequentially installed on the bottom plate behind the extrusion mechanism; The cooling mechanism includes a first water tank fixedly mounted on the bottom plate, the top of the first water tank is open, a plurality of brackets are mounted on the bottom plate, a first mounting bracket located above the first water tank is commonly mounted on the ends of the plurality of brackets, a horizontal second water tank is mounted on the first mounting bracket, and a plurality of water outlets connected to the interior of the second water tank are evenly fixedly mounted on the bottom of the second water tank along the front-to-back direction; a plurality of second mounting brackets are evenly fixedly mounted on the bottom plate along the front-to-back direction on one side of the first water tank, a pipe sleeve and a water pump are fixedly mounted on each of the second mounting brackets, an inverted L-shaped pipe is fixedly mounted on the pipe sleeve, both ends of the L-shaped pipe are respectively connected to the first water tank and the corresponding water pump, and the water pump is used to supply water to the second water tank; The cutting mechanism includes a shaping frame fixedly mounted on a base plate, a cutting support plate fixedly mounted at a position behind the shaping frame on the base plate, a knife holder arranged in a front-to-back direction fixedly mounted horizontally on the front end surface of the cutting support plate, and a cutting blade fixedly mounted on the front end surface of the knife holder; a vertical plate arranged in a front-to-back direction fixedly mounted on the front end surface of the cutting support plate, and internal support assemblies mounted on the top and bottom surfaces of the vertical plate; the cutting mechanism also includes a pulling assembly for pulling the cut insulating sheath; The internal support assembly includes several internal support rods fixedly installed on the vertical plate, and the several internal support rods are arranged in the front-to-back direction and the height of the internal support rods gradually increases from the front to the back; the internal support rods are round rods and the edges of the end of the internal support rods are rounded. The inner wall of the insulating sheath contacts each internal support rod in turn and stretches the insulating sheath, so that the raised part of the insulating sheath is separated up and down along the cutting line.

2. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 1, characterized in that: The second water tank is rotatably matched with the first mounting bracket, and a rotating shaft passing through the first mounting bracket is fixedly installed at the end of the second water tank, a driven gear is fixedly installed at the end of the rotating shaft, and a torsion spring is installed between the driven gear and the first mounting bracket; a cooling motor is fixedly installed on the first mounting bracket through a motor seat, and a sector gear meshing with the driven gear is fixedly installed on the output shaft of the cooling motor.

3. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 2, characterized in that: A third water tank is fixedly mounted on the first mounting frame, and the bottom of the third water tank is connected to the second water tank through a hose; a water pump supplies water to the third water tank.

4. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 3, characterized in that: A water inlet pipe is fixedly installed on the top of the third water tank corresponding to the position of each water pump, and the water inlet pipe is trumpet-shaped with a larger top and a smaller bottom; the second mounting bracket is fixedly installed with a third mounting bracket, and the third mounting bracket is fixedly installed with a hemispherical block corresponding to the water pump outlet position.

5. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 2, characterized in that: A connecting plate is fixedly installed on the bottom of the first water tank, and an arc-shaped plate with an upward opening is fixedly installed on the top of the connecting plate. The arc-shaped plates are arranged along the front-to-back direction and arc-shaped bars are fixedly installed on the front and rear ends of the arc-shaped plates.

6. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 1, characterized in that: Two water baffles are fixedly installed on the inner wall of the first water tank, a filter plate is fixedly installed between the two water baffles, and the bottom end of the L-shaped pipe is located in the range surrounded by the filter plate, the two water baffles and the inner wall of the first water tank.

7. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 1, characterized in that: A shaping block cooperating with the cutting blade is fixedly mounted on the front end surface of the cutting support plate through a plurality of connecting rods.

8. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 1, characterized in that: The pulling assembly includes a pulling support plate vertically fixedly mounted on the base plate and located on one side of the vertical plate, a roller frame is installed on the surface of the pulling support plate facing the vertical plate corresponding to the position of each inner support assembly, and a vertical pulling roller is rotatably installed on the roller frame; a pulling motor for driving the pulling roller to rotate is fixedly mounted on one of the roller frames, and the upper and lower pulling rollers are connected together by a connecting shaft; a vertical driven roller is rotatably installed on the surface of the pulling support plate facing the vertical plate corresponding to the position of each pulling roller.

9. The device for manufacturing and forming a prefabricated insulating sheath for a power grid according to claim 1, characterized in that: A cross-shaped inner support frame is horizontally fixedly installed on the front end surface of the vertical plate.

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