Rigid mineral insulated fire resistant cable and process for manufacturing same

Abstract

The application discloses a kind of rigid mineral insulation fireproof cable and manufacturing process thereof, it is related to fireproof cable technical field, including the following steps: S1, conductor and copper band are sent into transverse bending frame inside from the top end of continuous conveying frame respectively, and are sent by bending conveying roller clamping, copper band is bent into U shape, S2, using blanking connection passage, uniform conveying pipe and feeding arc-shaped plate cooperate, in the process of bending conveying, magnesium oxide powder is sent between conductor and copper band, S3, then make conductor pass through from the inside of positioning clamping cylinder, the application structure scientific and reasonable, use safe and convenient, set up continuous bending and filling mechanism, copper band and conductor are separated by tightening support spring, concave shaft seat, lamination clamping roller and positioning clamping cylinder cooperation, and using the cooperation of rotary adjusting ring, driven friction wheel, lifting push rod, clamping push block and rotary support plate, according to need, push along with clamping positioning vertical frame and slide along clamping adjusting frame outside.

Description

Technical Field

[0001] This invention relates to the field of fire-resistant cable technology, specifically to a rigid mineral-insulated fire-resistant cable and its manufacturing process. Background Technology

[0002] Rigid mineral-insulated fireproof cable is a top-tier fireproof cable designed for extreme conditions. Its core feature is the use of inorganic mineral magnesium oxide as insulation material and a seamless copper tube as sheath for the power supply. For example, a production line for a mineral-insulated fireproof cable is disclosed, application number CN201821349086.9. This patent uses two different direct-pull machines to pull the cable, which can be applied to semi-finished cables with different radii and pulling forces.

[0003] However, during the production of existing mineral-insulated fire-resistant cables, it is inconvenient to position the conductor and copper strip and uniformly fill magnesium oxide powder, which affects the cable production effect. At the same time, blockage and spillage are prone to occur, resulting in waste. Therefore, in order to avoid the above-mentioned technical problems, it is indeed necessary to provide a rigid mineral-insulated fire-resistant cable and its manufacturing process to overcome the defects in the existing technology. Summary of the Invention

[0004] This invention provides a rigid mineral-insulated fireproof cable and its manufacturing process, which can effectively solve the problems mentioned in the background art, such as the inconvenience of positioning the conductor and copper strip and uniformly filling magnesium oxide powder, which affects the cable production effect and easily causes blockage and spillage, resulting in waste.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a manufacturing process for a rigid mineral-insulated fire-resistant cable, comprising the following steps:

[0006] S1. The conductor and copper strip are fed into the transverse bending frame from the top of the continuous conveyor frame, and are clamped and conveyed by the bending conveyor rollers to bend the copper strip into a U-shape.

[0007] S2. By using the material feeding connection channel, uniform conveying pipe and feeding arc plate in combination, magnesium oxide powder is fed between the conductor and copper strip during the bending and conveying process.

[0008] S3. Then, the conductor passes through the inside of the positioning clamping cylinder, and the copper strip passes through the outside of the positioning clamping cylinder and is clamped and positioned. Then, it is clamped between the bending cylinder wheels, bent to form a copper tube, and the gap is welded by a high-frequency argon arc welding head.

[0009] S4. The welded copper strip passes through the grinding and impurity removal box, and the welded protrusions are ground by the cooperation of a high-efficiency grinding motor, an inner cross shaft, a cross support rod and a polishing wheel.

[0010] S5. Using the cooperation of the traction conveyor wheel and the traction drive motor, the formed cable is clamped and conveyed, and then the swinging rotating top block pushes the swinging paddle, the swinging rotating shaft and the swinging hammer rod to rotate and open.

[0011] According to the above technical solution, the bending angle of the copper strip in S1 is controlled between 80° and 120°;

[0012] The filling rate of the S2 magnesium oxide powder is 1.0 to 2.5 kg / min. During the filling process, the conductor temperature is kept below 60°C, and the magnesium oxide powder is used after being dried at 150°C to 200°C.

[0013] The welding current for the S3 high-frequency argon arc welding is controlled at 180–220A, and the welding speed is 8–12 m / min to ensure a dense weld and minimal welding stress.

[0014] According to the above technical solution, the linear speed of the S5 traction conveyor wheel is 5-10 m / min, and the traction tension is maintained at 40-60 N;

[0015] The frequency of the oscillating hammering is controlled at 100–300 times / min, and the hammering angle is 15°–30°. According to the above technical solution, the linear speed of the S5 traction conveyor wheel is 5–10 m / min, and the traction tension is maintained at 40–60 N to ensure continuous and stable cable forming.

[0016] The frequency of oscillating hammering is controlled at 100 to 300 times / min, and the hammering angle is 15° to 30°, thereby achieving high density filling of magnesium oxide powder.

[0017] According to the above technical solution, the inner wall of the continuous conveyor is equipped with a vertical mounting plate, and the continuous conveyor is provided with a continuous bending and filling mechanism, which includes a positioning and anti-deviation frame.

[0018] The continuous conveyor frame is equidistantly fitted with positioning anti-deviation frames on its inner wall, and a positioning clamping cylinder is fitted inside one of the positioning anti-deviation frames. A clamping adjustment frame is fitted inside the inner wall of the positioning clamping cylinder. A lifting push rod is connected inside the clamping adjustment frame. A clamping push block is symmetrically sleeved on the outside of the lifting push rod. A rotating support plate is connected to both ends of the clamping push block.

[0019] A clamping and positioning vertical frame is movably connected to the outside of the clamping and adjusting frame; a driven friction wheel is snapped into the top of the lifting push rod, and a rotating adjusting ring is connected to the top of the positioning clamping cylinder;

[0020] Another of the aforementioned positioning anti-deviation frames has a packing anti-leakage cylinder internally engaged.

[0021] According to the above technical solution, both of the positioning anti-deviation frames are movably connected to concave shaft seats, and the concave shaft seats are rotatably connected to fitting clamping rollers. Furthermore, tensioning support springs are equidistantly engaged between the concave shaft seats and the positioning anti-deviation frames.

[0022] A storage drying cylinder is clamped at one side of the top of the continuous conveyor frame, a feeding connection channel is clamped at the bottom of the storage drying cylinder, a uniform conveying pipe is clamped at the other end of the feeding connection channel, and a feeding arc plate is clamped at the other end of the uniform conveying pipe corresponding to the positioning clamping cylinder.

[0023] Both the inner wall of the feeding connection channel and the inner wall of the uniform conveying pipe are fitted with cross-shaped fixing frames. Both the inside of the cross-shaped fixing frames on the feeding connection channel and the inside of the cross-shaped fixing frames on the uniform conveying pipe are rotatably connected with power transmission rods. Both adjacent ends of the two power transmission rods are fitted with conical transmission gears. The top of the storage drying cylinder is connected to a packing conveying motor by bolts.

[0024] A protective sealing cylinder is provided between the two cross-shaped fixing frames at the outer position of the corresponding power transmission rod, and a spiral feeding plate is fixedly sleeved at the bottom position of the power transmission rod on the outer side of the uniform conveying pipe.

[0025] According to the above technical solution, the top of the inner wall of the continuous conveying frame is equidistantly clamped with a transverse bending frame, and the inner wall of the continuous conveying frame is clamped with a transverse bending frame at the position corresponding to the installation of the vertical pad plate. Both ends of the transverse bending frame are rotatably connected with a bidirectional adjusting screw. The outer side of the bidirectional adjusting screw is symmetrically sleeved with a sliding adjusting shaft seat through a thread, and a bending conveying roller is rotatably connected between the two opposite sliding adjusting shaft seats.

[0026] One end of the mounting vertical pad is symmetrically and equidistantly connected to a bent cylindrical wheel, and one end of the continuous conveyor frame is clamped to a spliced ​​welding frame, with a high-frequency argon arc welding head installed inside the spliced ​​welding frame.

[0027] According to the above technical solution, there are three transverse bending frames. The threads at both ends of the bidirectional adjusting screw rotate in opposite directions. The two bending conveying rollers inside the transverse bending frame above the positioning anti-deviation frame have unequal thicknesses. The two bending conveying rollers inside the transverse bending frame on the mounting vertical pad have equal thicknesses. The high-frequency argon arc welding head is powered by an external power source.

[0028] According to the above technical solution, a polishing and traction vibration mechanism is provided at the bottom of the inner wall of the continuous conveyor frame, and the polishing and traction vibration mechanism includes a grinding and impurity removal box;

[0029] A grinding and impurity removal box is snapped into the bottom position of one end of the mounting vertical pad, and an inner cross shaft is rotatably connected to one end of the grinding and impurity removal box at equal intervals.

[0030] A high-efficiency grinding motor is installed at one end of the grinding and impurity removal box. Power transmission gears are fixedly sleeved on the outer side of the output shaft and the outer side of the inner cross shaft of the high-efficiency grinding motor.

[0031] The two inner cross shafts are movably connected to a cross support rod. The other end of the cross support rod is engaged with a polishing wheel. One end of the polishing wheel and the inner wall of the grinding and impurity removal box are rotatably connected to an annular rotating pad. A tensioning push spring is engaged between the two annular rotating pads.

[0032] Both ends of the grinding and impurity removal box are fitted with slag discharge channels;

[0033] A traction bracket is snapped into the inner wall of the continuous conveyor frame at the position corresponding to the bottom of the grinding and impurity removal box. One end of the traction bracket is connected to a traction drive motor by bolts.

[0034] The other end of the traction bracket is symmetrically rotatably connected to a traction rod, and a traction conveying wheel is fixedly sleeved on the outer side of each of the two traction rods, and a synchronous transmission gear is fixedly sleeved on the outer side of each of the two traction rods.

[0035] The top of the traction bracket is fitted with an L-shaped positioning plate, one end of which is symmetrically connected to a swing rotation shaft, one end of which is fitted with a swing hammer rod, and the bottom end of the swing hammer rod is fitted with a counterweight hammer ball.

[0036] The traction lever is equidistantly engaged with a swinging rotating top block at the position corresponding to the synchronous transmission gear on the outer side, and swinging paddles are engaged at the bottom ends of both swinging rotating shafts.

[0037] According to the above technical solution, one end of the inner cross shaft is embedded inside the grinding and impurity removal box, and the high-efficiency grinding motor is powered by an external power source.

[0038] The output shaft of the traction drive motor is connected to one end of a traction lever. The traction drive motor is powered by an external power source. A rubber ring is fitted around the outside of the traction conveyor wheel. The swing rotating top block and the swing lever are located on the same vertical plane.

[0039] According to the above technical solution, a rigid mineral-insulated fireproof cable, and a rigid mineral-insulated fireproof cable manufactured according to a rigid mineral-insulated fireproof cable manufacturing process, wherein a flame-retardant inner sheath is sleeved on the outside of the conductor body, a copper strip body is sleeved on the outside of the conductor body, a flame-retardant outer sheath is sleeved on the inner wall of the copper strip body, and a reinforcing wire frame is snapped onto the inner wall of the flame-retardant outer sheath and the outside of the flame-retardant inner sheath.

[0040] A magnesium oxide powder filling layer is filled between the flame-retardant inner sheath and the flame-retardant outer sheath.

[0041] Both ends of the outer side of the conductor body are movably fitted with external threaded sleeves. An internal threaded cylinder is threadedly connected to the outer side of the external threaded sleeve, and the internal threaded cylinder is connected with a sealing and waterproof ring. Sealing wrapping tape is wound around the outer side of the conductor body corresponding to the position of the external threaded sleeve.

[0042] Compared with the prior art, the beneficial effects of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use.

[0043] 1. A continuous bending and filling mechanism is set up. Through the cooperation of tension support spring, concave shaft seat, fitting clamping roller and positioning clamping cylinder, the copper strip and conductor are separated. By using the cooperation of rotating adjustment ring, driven friction wheel, lifting push rod, clamping push block and rotating support plate, the clamping positioning vertical frame is pushed to slide along the outside of the clamping adjustment frame as needed to adjust the clamping diameter. It can clamp and position conductors of different sizes, forcing the conductor to be centered with the inside of the copper strip, ensuring the uniformity of subsequent magnesium oxide powder filling, preventing conductor displacement, and preventing the subsequent magnesium oxide powder filling from being too thin or too thick.

[0044] Through the cooperation of the power transmission rod and the conical transmission gear, the filling conveying motor drives the spiral feeding plate to rotate, so as to uniformly convey the magnesium oxide powder, preventing the filling from being too large at one time, which could cause blockage and spillage. Guided by the feeding arc plate, the powder enters between the copper strip and the conductor, and falls along the filling anti-leakage cylinder. Before the copper strip is formed into the cylinder, the magnesium oxide powder is blocked to prevent it from scattering, thus ensuring the filling effect.

[0045] By cooperating with the bidirectional adjusting screw, sliding adjusting shaft seat and bending conveyor roller, the copper strip and conductor passing through the transverse bending frame are clamped and conveyed. During the conveying process, the copper strip body is bent into a U-shape. Then, with the cooperation of the bending cylinder wheel, the filled U-shaped copper strip body is bent into a cylinder, completing the wrapping of the conductor by the copper strip. At the same time, magnesium oxide powder is continuously filled, which improves the convenience of processing rigid mineral insulated fireproof cables.

[0046] 2. A polishing and traction vibration mechanism is set up. Through the transmission of power transmission gears, the high-efficiency grinding motor drives the two inner cross shafts, the cross support rod and the polishing wheel to rotate together to grind and polish the welded joints of the cable, thereby removing the protrusions after welding and ensuring the smoothness of the outer side of the cable. At the same time, during grinding and polishing, the tension push spring pushes the annular rotating pad, the cross support rod and the polishing wheel to move, ensuring the fit with the outer side of the cable and improving the grinding and polishing effect.

[0047] The cable is clamped and positioned by using a traction rod and a traction conveyor wheel. At the same time, the synchronous transmission gears facilitate the traction drive motor to drive the two traction rods and the traction conveyor wheel to rotate synchronously relative to each other, clamping and pulling the formed cable, while ensuring the stability of the cable and reducing shaking during grinding and polishing.

[0048] The rotation of the traction rod and traction conveyor wheel drives the oscillating rotating block to rotate, which in turn intermittently pushes the oscillating lever and oscillating rotating shaft to rotate. This causes the oscillating hammer rod and counterweight hammer to rotate and open. Then, through the weight of the counterweight hammer hitting the ball, the oscillating hammer rod and oscillating rotating shaft rotate back to their original position, generating inertia to strike the cable. This cycle repeats continuously and intermittently, striking the cable during the cable traction process, causing it to vibrate. This, in turn, causes the magnesium oxide powder inside to vibrate, preventing blockage and facilitating the filling of gaps, thus improving the filling effect.

[0049] 3. A flame-retardant inner sheath, a flame-retardant outer sheath, and a reinforcing wire frame are provided. These allow for processing and filling between the copper strip body and the conductor body, further improving the cable's strength and preventing the magnesium oxide powder filling layer from becoming loose. The combination of the external threaded sleeve and the internal threaded cylinder facilitates the installation of a sealing and waterproof ring between the conductor body and the copper strip body, sealing and protecting the magnesium oxide powder filling layer from moisture and ensuring its dryness. In addition, sealing tape can be used to easily wrap and fix the external threaded sleeve, improving its stability.

[0050] In summary, by coordinating continuous bending and filling mechanisms with polishing and traction vibration mechanisms, magnesium oxide powder is simultaneously filled during the bending and conveying of copper strips and conductors. This improves production continuity and increases production efficiency. Furthermore, the filled cables can be vibrated to ensure the magnesium oxide powder is packed more tightly, preventing voids. This creates a highly efficient, continuous, and automated integrated manufacturing device for rigid mineral-insulated fire-resistant cables, eliminating the need for segmented operations and reducing human intervention. Attached Figure Description

[0051] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0052] In the attached diagram:

[0053] Figure 1 This is a flowchart of the manufacturing process of the fireproof cable of this invention;

[0054] Figure 2 This is a schematic diagram of the installation structure of the vertical mounting plate of the present invention;

[0055] Figure 3 This is a schematic diagram of the installation structure of the positioning clamping cylinder of the present invention;

[0056] Figure 4 This is a schematic diagram of the installation structure of the clamping adjustment frame of the present invention;

[0057] Figure 5 This is a schematic diagram of the installation structure of the clamping and pushing block of the present invention;

[0058] Figure 6 This is a schematic diagram of the continuous bending and filling mechanism of the present invention;

[0059] Figure 7 This is a schematic diagram of the installation structure of the bending conveyor roller of the present invention;

[0060] Figure 8 This is a schematic diagram of the installation structure of the slag discharge slide of the present invention;

[0061] Figure 9 This is a schematic diagram of the installation structure of the cross support rod of the present invention;

[0062] Figure 10 This is a schematic diagram of the polishing and traction vibration compaction mechanism of the present invention;

[0063] Figure 11 This is a schematic diagram of the installation structure of the oscillating paddle of the present invention;

[0064] Figure 12 This is a schematic diagram of the installation structure of the sealing and waterproof ring of the present invention.

[0065] Labels in the diagram: 1. Continuous conveyor frame; 2. Mounting vertical pad;

[0066] 3. Continuous bending and filling mechanism; 301. Positioning and anti-deviation frame; 302. Clamping and adjusting frame; 303. Lifting push rod; 304. Clamping and pushing block; 305. Rotating support plate; 306. Clamping and positioning vertical frame; 307. Driven friction wheel; 308. Rotating adjusting ring; 309. Filler leak-proof cylinder; 310. Concave shaft seat; 311. Adhesive clamping roller; 312. Tensioning support spring; 313. Material storage and drying cylinder; 314. Discharge connecting channel; 315. Uniform 316. Conveying pipe; 317. Feeding arc plate; 318. Cross-shaped fixing frame; 319. Power transmission rod; 320. Convex transmission gear; 321. Packing conveyor motor; 322. Protective sealing cylinder; 323. Spiral feeding plate; 324. Transverse bending frame; 325. Bidirectional adjusting screw; 326. Sliding adjusting shaft seat; 327. Bending conveyor roller; 328. Bending into cylinder wheel; 329. Spliced ​​welding frame; 330. High-frequency argon arc welding head; 340. Positioning clamping cylinder;

[0067] 4. Polishing and traction vibration compaction mechanism; 401. Grinding and impurity removal box; 402. Inner cross shaft; 403. High-efficiency grinding motor; 404. Power transmission gear; 405. Cross support rod; 406. Polishing wheel; 407. Annular rotating pad; 408. Tensioning push spring; 409. Slag discharge slide; 410. Traction bracket; 411. Traction drive motor; 412. Traction rotating rod; 413. Traction conveying wheel; 414. Synchronous transmission gear; 415. L-shaped positioning plate; 416. Swinging rotating shaft; 417. Swinging hammer rod; 418. Counterweight hammer striking ball; 419. Swinging rotating top block; 420. Swinging paddle;

[0068] 5. Conductor body; 6. Flame-retardant inner sheath; 7. Copper strip body; 8. Flame-retardant outer sheath; 9. Reinforcing wire frame; 10. Magnesium oxide powder filling layer; 11. External threaded sleeve; 12. Internal threaded cylinder; 13. Sealing waterproof ring; 14. Sealing wrapping tape. Detailed Implementation

[0069] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0070] Example: Figure 1-11 As shown, the present invention provides a technical solution, a manufacturing process for a rigid mineral-insulated fire-resistant cable, comprising the following steps:

[0071] S1. The conductor and copper strip are fed from the top of the continuous conveyor frame 1 into the transverse bending frame 323, and are clamped and conveyed by the bending conveyor roller 326 to bend the copper strip into a U-shape.

[0072] S2. By using the material feeding connection channel 314, the uniform conveying pipe 315 and the feeding arc plate 316 in combination, magnesium oxide powder is fed between the conductor and the copper strip during the bending and conveying process.

[0073] S3. Then, the conductor passes through the inside of the positioning clamping cylinder 330, and the copper strip passes through the outside of the positioning clamping cylinder 330 and is clamped and positioned. Then, it is clamped between the bending cylinder wheels 327, bent to form a copper tube, and the gap is welded by the high-frequency argon arc welding head 329.

[0074] S4. The welded copper strip passes through the grinding and impurity removal box 401. Through the cooperation of the high-efficiency grinding motor 403, the inner cross shaft 402, the cross support rod 405 and the polishing wheel 406, the welded protrusions are ground.

[0075] S5. By using the cooperation of the traction conveyor wheel 413 and the traction drive motor 411, the formed cable is clamped and conveyed. Then, the swing rotating top block 419 pushes the swinging paddle 420, the swing rotating shaft 416 and the swinging hammer rod 417 to rotate and open, so as to facilitate the hammering of the formed cable and make the internal magnesium oxide powder fill more tightly.

[0076] According to the above technical solution, the bending angle of the copper strip in S1 is controlled between 80° and 120° to ensure the roundness of the copper tube formed by subsequent welding.

[0077] The filling rate of S2 magnesium oxide powder is 1.0 to 2.5 kg / min. During the filling process, the conductor temperature should be kept below 60°C to prevent the powder from getting damp and clumping. The magnesium oxide powder is used after being dried at 150°C to 200°C.

[0078] The welding current for S3 high-frequency argon arc welding is controlled at 180–220A, and the welding speed is 8–12 m / min to ensure a dense weld and minimal welding stress.

[0079] According to the above technical solution, the linear speed of the S5 traction conveyor wheel is 5-10 m / min, and the traction tension is maintained at 40-60 N to ensure continuous and stable cable forming.

[0080] The frequency of oscillating hammering is controlled at 100 to 300 times / min, and the hammering angle is 15° to 30°, thereby achieving high density filling of magnesium oxide powder.

[0081] The inner wall of the continuous conveyor frame 1 is equipped with a vertical mounting plate 2, and the continuous conveyor frame 1 is equipped with a continuous bending and filling mechanism 3.

[0082] The continuous bending and filling mechanism 3 includes a positioning anti-deviation frame 301, a clamping adjustment frame 302, a lifting push rod 303, a clamping push block 304, a rotating support plate 305, a clamping positioning vertical frame 306, a driven friction wheel 307, a rotating adjustment ring 308, a filling leak-proof cylinder 309, a concave shaft seat 310, a fitting clamping roller 311, a tensioning support spring 312, a storage drying cylinder 313, a material discharge connecting channel 314, a uniform conveying pipe 315, a feeding arc plate 316, a cross fixing frame 317, a power transmission rod 318, a conical transmission gear 319, a filling conveying motor 320, a protective sealing cylinder 321, a spiral feeding plate 322, a transverse bending frame 323, a bidirectional adjusting screw 324, a sliding adjusting shaft seat 325, a bending conveying roller 326, a bending cylinder wheel 327, a spliced ​​welding frame 328, and a high-frequency argon arc welding head 329.

[0083] The inner wall of the continuous conveyor frame 1 is equidistantly fitted with positioning anti-deviation frames 301, and a positioning clamping cylinder 330 is fitted inside one of the positioning anti-deviation frames 301. A clamping adjustment frame 302 is fitted inside the inner wall of the positioning clamping cylinder 330. A lifting push rod 303 is connected inside the clamping adjustment frame 302. A clamping push block 304 is symmetrically sleeved on the outside of the lifting push rod 303. A rotating support plate 305 is connected to both ends of the clamping push block 304.

[0084] A clamping and positioning vertical frame 306 is movably connected to the outside of the clamping and adjusting frame 302; a driven friction wheel 307 is snapped onto the top of the lifting push rod 303; and a rotating adjusting ring 308 is connected to the top of the positioning clamping cylinder 330.

[0085] Another positioning anti-deviation frame 301 has a packing anti-leakage cylinder 309 inside. In order to facilitate the clamping of the conductor, the bottom end of the positioning clamping cylinder 330 is fixedly connected to the top end of the packing anti-leakage cylinder 309, and a feeding groove is opened at one end of the positioning clamping cylinder 330. The top and bottom threads of the outer side of the lifting push rod 303 rotate in opposite directions. The outer side of the lifting push rod 303 is connected to the inner wall of the clamping push block 304 by threads. The other end of the rotating support plate 305 is rotatably connected to one end of the clamping positioning vertical frame 306. Friction teeth protrusions are equidistantly arranged on the inner wall of the rotating adjustment ring 308.

[0086] Both positioning anti-deviation frames 301 are movably connected to concave bearing seats 310. The concave bearing seats 310 are rotatably connected to a clamping roller 311, and tensioning support springs 312 are equidistantly engaged between the concave bearing seats 310 and the positioning anti-deviation frames 301.

[0087] A storage drying cylinder 313 is clamped at one side of the top of the continuous conveyor frame 1. A feeding connection channel 314 is clamped at the bottom of the storage drying cylinder 313. A uniform conveying pipe 315 is clamped at the other end of the feeding connection channel 314. A feeding arc plate 316 is clamped inside the positioning clamping cylinder 330 at the other end of the uniform conveying pipe 315.

[0088] Both the inner wall of the material feeding connection channel 314 and the inner wall of the uniform conveying pipe 315 are fitted with cross-shaped fixing brackets 317. Both the inside of the cross-shaped fixing brackets 317 on the material feeding connection channel 314 and the inside of the cross-shaped fixing brackets 317 on the uniform conveying pipe 315 are rotatably connected with power transmission rods 318. Both adjacent ends of the two power transmission rods 318 are fitted with bevel transmission gears 319. The top of the material storage drying cylinder 313 is connected to the filler conveying motor 320 by bolts.

[0089] A protective sealing cylinder 321 is provided between the two cross-shaped fixing frames 317 at the outer position of the power transmission rod 318. A spiral feeding plate 322 is fixedly sleeved at the bottom position of the power transmission rod 318 on the uniform conveying pipe 315. In order to facilitate filling, both ends of the concave shaft seat 310 are slidably connected to the inner wall of the positioning anti-deviation frame 301. The bottom end of the feeding arc plate 316 is connected to the top end of the filling anti-leakage cylinder 309. The bottom end of the output end of the filling conveying motor 320 is connected to the top end of a power transmission rod 318, and the filling conveying motor 320 is powered by an external power source.

[0090] A transverse bending frame 323 is equidistantly clamped at the top of the inner wall of the continuous conveyor frame 1, and a transverse bending frame 323 is clamped at the corresponding position of the vertical pad 2 installed on the inner wall of the continuous conveyor frame 1. Both ends of the transverse bending frame 323 are rotatably connected to a bidirectional adjusting screw 324. A sliding adjusting shaft seat 325 is symmetrically sleeved on the outside of the bidirectional adjusting screw 324 through a thread, and a bending conveyor roller 326 is rotatably connected between the two opposite sliding adjusting shaft seats 325.

[0091] One end of the vertical mounting plate 2 is symmetrically and equidistantly connected to a bending cylinder wheel 327. One end of the continuous conveyor frame 1 is clamped to a splicing welding frame 328, and a high-frequency argon arc welding head 329 is installed inside the splicing welding frame 328. In order to facilitate bending the copper strip into a cylinder and wrapping the conductor, there are three transverse bending frames 323. The threads at both ends of the bidirectional adjusting screw 324 rotate in opposite directions. The two bending conveying rollers 326 inside the transverse bending frame 323 located above the positioning anti-deviation frame 301 have unequal thicknesses, while the two bending conveying rollers 326 inside the transverse bending frame 323 located on the vertical mounting plate 2 have equal thicknesses. The high-frequency argon arc welding head 329 is powered by an external power source.

[0092] A polishing and traction vibration mechanism 4 is provided at the bottom of one end of the mounting vertical pad 2.

[0093] The polishing and traction vibration compaction mechanism 4 includes a grinding and impurity removal box 401, an inner cross shaft 402, a high-efficiency grinding motor 403, a power transmission gear 404, a cross support rod 405, a polishing wheel 406, an annular rotating pad 407, a tensioning push spring 408, a slag discharge slide 409, a traction bracket 410, a traction drive motor 411, a traction rotating rod 412, a traction conveying wheel 413, a synchronous transmission gear 414, an L-shaped positioning plate 415, a swing rotating shaft 416, a swing hammer rod 417, a counterweight hammer ball 418, a swing rotating top block 419, and a swing paddle 420.

[0094] A grinding and impurity removal box 401 is snapped into the bottom of the inner wall of the continuous conveyor frame 1. An inner cross shaft 402 is rotatably connected to one end of the grinding and impurity removal box 401 at equal intervals.

[0095] A high-efficiency grinding motor 403 is installed at one end of the grinding and impurity removal box 401. Power transmission gears 404 are fixedly sleeved on the outer side of the output shaft of the high-efficiency grinding motor 403 and the outer side of the inner cross shaft 402. In order to facilitate grinding and polishing of the welded cable, one end of the inner cross shaft 402 is embedded in the grinding and impurity removal box 401. The high-efficiency grinding motor 403 is powered by an external power source.

[0096] Two inner cross shafts 402 are internally connected to cross support rods 405. The other end of the cross support rods 405 is engaged with a polishing wheel 406. One end of the polishing wheel 406 and the inner wall of the grinding and impurity removal box 401 are rotatably connected to annular rotating pads 407. Tensioning push springs 408 are engaged between the two annular rotating pads 407.

[0097] Both ends of the grinding and impurity removal box 401 are fitted with slag discharge channels 409;

[0098] A traction bracket 410 is snapped onto the inner wall of the continuous conveyor frame 1 at the bottom position of the grinding and impurity removal box 401. One end of the traction bracket 410 is connected to a traction drive motor 411 by bolts.

[0099] The other end of the traction bracket 410 is symmetrically rotatably connected to a traction rod 412, and a traction conveyor wheel 413 is fixedly sleeved on the outer side of each of the two traction rods 412, and a synchronous transmission gear 414 is fixedly sleeved on the outer side of each of the two traction rods 412.

[0100] The top of the traction bracket 410 is fitted with an L-shaped positioning plate 415. One end of the L-shaped positioning plate 415 is symmetrically rotated and connected to a swing rotation shaft 416. One end of the swing rotation shaft 416 is fitted with a swing hammer rod 417. The bottom end of the swing hammer rod 417 is fitted with a counterweight hammer ball 418.

[0101] A swing rotating top block 419 is equidistantly engaged on the outer side of the traction rod 412, corresponding to the position of the synchronous transmission gear 414. A swing lever 420 is engaged at the bottom end of each of the two swing rotating shafts 416. In order to facilitate the traction and transportation of the cable, the output shaft of the traction drive motor 411 is connected to one end of a traction rod 412. The traction drive motor 411 is powered by an external power source. A rubber ring is sleeved on the outer side of the traction conveying wheel 413. The swing rotating top block 419 and the swing lever 420 are located on the same vertical plane.

[0102] like Figure 12 As shown, a rigid mineral-insulated fireproof cable includes a conductor body 5, a flame-retardant inner sheath 6 sleeved on the outside of the conductor body 5, a copper strip body 7 sleeved on the outside of the conductor body 5, a flame-retardant outer sheath 8 sleeved on the inner wall of the copper strip body 7, and a reinforcing wire frame 9 snapped onto the inner wall of the flame-retardant outer sheath 8 and the outside of the flame-retardant inner sheath 6.

[0103] A magnesium oxide powder filling layer 10 is filled between the flame-retardant inner sheath 6 and the flame-retardant outer sheath 8.

[0104] Both ends of the outer side of the conductor body 5 are movably fitted with external threaded sleeves 11. An internal threaded cylinder 12 is threadedly connected to the outer side of the external threaded sleeve 11, and the internal threaded cylinder 12 is connected to a sealing waterproof ring 13. A sealing wrapping tape 14 is wound around the outer side of the conductor body 5 on the side corresponding to the external threaded sleeve 11.

[0105] The working principle and usage process of this invention: By cooperating with the flame-retardant inner sheath 6, the flame-retardant outer sheath 8 and the reinforcing wire frame 9, the space between the copper strip body 7 and the conductor body 5 is processed and filled, thereby improving the stability of the magnesium oxide powder filling layer 10 and preventing the magnesium oxide powder filling layer 10 from becoming loose. At the same time, by cooperating with the external threaded sleeve 11 and the internal threaded cylinder 12, the sealing waterproof ring 13 is installed between the conductor body 5 and the copper strip body 7, thereby sealing and protecting the magnesium oxide powder filling layer 10, preventing moisture from occurring and ensuring the dryness of the inside of the magnesium oxide powder filling layer 10. In addition, the sealing wrapping tape 14 facilitates the wrapping and fixing of the external threaded sleeve 11, improving the stability of the external threaded sleeve 11.

[0106] Manufacturing process of rigid mineral insulated fireproof cable: The copper strip and conductor are conveyed together from the top of the continuous conveyor frame 1 into the transverse bending frame 323. At the same time, the bidirectional adjusting screw 324 is rotated to move the sliding adjusting shaft seat 325 synchronously relative to each other inside the transverse bending frame 323, changing the distance between the two bending conveyor rollers 326, bending the copper strip into a U-shape, and embedding the conductor into the copper strip, which facilitates the subsequent wrapping.

[0107] Then, the conductor passes through the inside of the positioning clamping cylinder 330, while the U-shaped copper strip passes through the outside of the positioning clamping cylinder 330. At the same time, the rotating adjustment ring 308 is rotated, and the power is transmitted through the cooperation of the friction tooth cam and the driven friction wheel 307, so that the three lifting push rods 303 rotate together, pushing the clamping push block 304 to move synchronously in opposite directions inside the clamping adjustment frame 302. Thus, through the cooperation of the rotating support plate 305, the clamping positioning vertical frame 306 is pushed to slide along the outside of the clamping adjustment frame 302, changing the distance between the three clamping adjustment frames 302, which facilitates the clamping of the conductor and improves the stability of the conductor.

[0108] At the same time, by utilizing the extension and retraction characteristics of the tension support spring 312, the concave shaft seat 310 is pushed to slide along the inner wall of the positioning anti-deviation frame 301, so that the clamping roller 311 clamps the U-shaped copper strip, ensuring the stability of the copper strip and forcing the axis of the conductor and the axis of the U-shaped copper strip to be on the same vertical line.

[0109] Next, the copper strip and conductor are passed through the bending drum 327, which facilitates the subsequent conveying process. The U-shaped copper strip is then bent into a copper tube, and the conductor is wrapped around the center of the copper tube to initially form a rigid mineral-insulated fireproof cable. The formed cable is then passed through the grinding and impurity removal box 401 and clamped and fixed by two traction conveying wheels 413. When the traction drive motor 411 is started, the synchronous transmission gear 414 is used to force the two traction rods 412 and the traction conveying wheel 413 to rotate synchronously relative to each other, thereby traction and conveying the formed cable, which is convenient for continuous production.

[0110] Next, while continuously conveying and bending the copper strip and conductor, the filler conveying motor 320 is started simultaneously. Through the cooperation of the power transmission rod 318 and the bevel transmission gear 319, the power is transmitted, causing the two power transmission rods 318 inside the feeding connection channel 314 and the uniform conveying pipe 315 to rotate together. In cooperation with the spiral feeding plate 322, the magnesium oxide powder inside the storage drying cylinder 313 is uniformly conveyed, so that it enters the U-shaped copper strip and conductor along the feeding arc plate 316. Then, the filler anti-leakage cylinder 309 is used to block the entering magnesium oxide powder and prevent the magnesium oxide powder from spilling out.

[0111] When the U-shaped copper strip is pulled through the bending wheel 327, it is bent into a cylinder, and the bent and fitted parts are welded and fixed by the high-frequency argon arc welding head 329, thus completing the wrapping of the conductor by the copper strip. During the wrapping process, magnesium oxide powder is continuously filled, which improves the convenience of processing rigid mineral insulated fireproof cables.

[0112] Next, when the filled and welded cable passes through the grinding and impurity removal box 401, the high-efficiency grinding motor 403 is started, and the power is transmitted through the power transmission gear 404, which drives the inner cross shaft 402, cross support rod 405 and polishing wheel 406 to rotate, grinding and polishing the welded parts of the cable, removing the welded bumps, and ensuring the smoothness of the outer side of the cable. During grinding and polishing, the tension push spring 408 pushes the annular rotating pad 407, cross support rod 405 and polishing wheel 406 to move, ensuring the contact effect between the polishing wheel 406 and the outer side of the cable, and ensuring the grinding and polishing effect.

[0113] Finally, the cable is clamped and positioned using the traction conveyor wheel 413, ensuring stability during grinding and polishing. Simultaneously, continuous traction and conveying of the cable improves production continuity. As the traction lever 412 and traction conveyor wheel 413 rotate, they synchronously drive the swing rotating block 419 to rotate. This causes the swing rotating block 419 to intermittently push the swing paddle 420 and swing rotating shaft 416 to rotate, which in turn causes the swing hammer rod 417 and counterweight hammer ball 418 to rotate and open. After the swing rotating block 419 leaves, the counterweight hammer ball 418, through its own gravity, causes the swing hammer rod 417 and swing rotating shaft 416 to rotate and reset, generating inertia to strike the cable, thus producing vibration. This vibration causes the magnesium oxide powder between the copper strip and the conductor to vibrate, facilitating the filling of gaps and ensuring the filling effect.

[0114] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A rigid mineral-insulated fire-resistant cable manufacturing equipment, characterized in that: It includes a continuous conveyor frame (1), the inner wall of which is equipped with a vertical mounting plate (2), and the continuous conveyor frame (1) is provided with a continuous bending and filling mechanism (3), which includes a positioning anti-deviation frame (301). The continuous conveyor frame (1) is equidistantly fitted with positioning anti-deviation frames (301) on its inner wall, and a positioning clamping cylinder (330) is fitted inside one of the positioning anti-deviation frames (301). A clamping adjustment frame (302) is fitted inside the inner wall of the positioning clamping cylinder (330). A lifting push rod (303) is connected inside the clamping adjustment frame (302). A clamping push block (304) is symmetrically sleeved on the outside of the lifting push rod (303). A rotating support plate (305) is connected to both ends of the clamping push block (304). The clamping adjustment frame (302) is movably connected to the outside of the clamping positioning vertical frame (306); the top of the lifting push rod (303) is engaged with the driven friction wheel (307), and the top of the positioning clamping cylinder (330) is connected with the rotating adjustment ring (308). Another positioning anti-deviation frame (301) has a packing anti-leakage cylinder (309) internally engaged. Both of the positioning anti-deviation frames (301) are movably connected to concave bearings (310), and the concave bearings (310) are rotatably connected to clamping rollers (311), and tensioning support springs (312) are equidistantly engaged between the concave bearings (310) and the positioning anti-deviation frames (301). A storage drying cylinder (313) is attached to one side of the top of the continuous conveyor frame (1). A feeding connection channel (314) is attached to the bottom of the storage drying cylinder (313). A uniform conveying pipe (315) is attached to the other end of the feeding connection channel (314). A feeding arc plate (316) is attached to the other end of the uniform conveying pipe (315) inside the positioning clamping cylinder (330). The continuous conveyor frame (1) has transverse bending frames (323) equidistantly clamped at the top of its inner wall, and the transverse bending frames (323) are also clamped at the corresponding positions of the vertical pads (2) installed on the inner wall of the continuous conveyor frame (1). Both ends of the transverse bending frames (323) are rotatably connected to bidirectional adjusting screws (324). The outer side of the bidirectional adjusting screws (324) is symmetrically sleeved with sliding adjusting shaft seats (325) by threads, and bending conveyor rollers (326) are rotatably connected between the two opposite sliding adjusting shaft seats (325). There are three transverse bending frames (323). The threads at both ends of the bidirectional adjusting screw (324) rotate in opposite directions. The two bending conveyor rollers (326) inside the transverse bending frame (323) above the positioning anti-deviation frame (301) have unequal thicknesses. The two bending conveyor rollers (326) inside the transverse bending frame (323) on the mounting vertical pad (2) have equal thicknesses. A polishing and traction vibration mechanism (4) is provided at the bottom of the inner wall of the continuous conveyor (1), and the polishing and traction vibration mechanism (4) includes a grinding and impurity removal box (401). A grinding and impurity removal box (401) is snapped into the bottom of one end of the mounting vertical pad (2), and an inner cross shaft (402) is rotatably connected to one end of the grinding and impurity removal box (401) at equal intervals. A high-efficiency grinding motor (403) is installed at one end of the grinding and impurity removal box (401). A power transmission gear (404) is fixedly sleeved on the outer side of the output shaft and the outer side of the inner cross shaft (402) of the high-efficiency grinding motor (403). Two inner cross shafts (402) are movably connected to a cross support rod (405). The other end of the cross support rod (405) is engaged with a polishing wheel (406). One end of the polishing wheel (406) and the inner wall of the grinding and impurity removal box (401) are rotatably connected to an annular rotating pad (407). A tensioning push spring (408) is engaged between the two annular rotating pads (407). Both ends of the grinding and impurity removal box (401) are fitted with slag discharge channels (409). The inner wall of the continuous conveyor (1) is fitted with a traction bracket (410) at the bottom position of the grinding and impurity removal box (401), and one end of the traction bracket (410) is connected to a traction drive motor (411) by bolts. The other end of the traction bracket (410) is symmetrically rotatably connected to a traction rod (412), and a traction conveyor wheel (413) is fixedly sleeved on the outer side of each of the two traction rods (412), and a synchronous transmission gear (414) is fixedly sleeved on the outer side of each of the two traction rods (412).

2. The rigid mineral-insulated fire-resistant cable manufacturing equipment according to claim 1, characterized in that: The inner wall of the feeding connection channel (314) and the inner wall of the uniform conveying pipe (315) are both fitted with cross-shaped fixing brackets (317). The inside of the cross-shaped fixing brackets (317) on the feeding connection channel (314) and the inside of the cross-shaped fixing brackets (317) on the uniform conveying pipe (315) are rotatably connected with power transmission rods (318). The adjacent ends of the two power transmission rods (318) are fitted with bevel transmission gears (319). The top of the storage drying cylinder (313) is connected to a filler conveying motor (320) by bolts. A protective sealing cylinder (321) is provided between the two cross-shaped fixing frames (317) at the outer position of the corresponding power transmission rod (318), and a spiral feeding plate (322) is fixedly sleeved at the bottom position of the outer side of the power transmission rod (318) on the uniform conveying pipe (315).

3. The rigid mineral-insulated fire-resistant cable manufacturing equipment according to claim 2, characterized in that: The mounting vertical pad (2) is symmetrically and equidistantly connected to a bent cylindrical wheel (327) at one end, and the continuous conveying frame (1) is clamped to a spliced ​​welding frame (328) at one end, and a high-frequency argon arc welding head (329) is installed inside the spliced ​​welding frame (328).

4. The rigid mineral-insulated fire-resistant cable manufacturing equipment according to claim 3, characterized in that: The high-frequency argon arc welding head (329) is powered by an external power source.

5. The rigid mineral-insulated fire-resistant cable manufacturing equipment according to claim 1, characterized in that: The top of the traction bracket (410) is fitted with an L-shaped positioning plate (415), and one end of the L-shaped positioning plate (415) is symmetrically rotated and connected to a swing rotation shaft (416). One end of the swing rotation shaft (416) is fitted with a swing hammer rod (417), and the bottom end of the swing hammer rod (417) is fitted with a counterweight hammer ball (418). The traction lever (412) is equidistantly engaged with a swing rotating top block (419) on the side corresponding to the synchronous transmission gear (414) on the outside, and swing paddles (420) are engaged at the bottom ends of the two swing rotating shafts (416).

6. The rigid mineral-insulated fire-resistant cable manufacturing equipment according to claim 5, characterized in that: One end of the inner cross shaft (402) is embedded inside the grinding and impurity removal box (401), and the high-efficiency grinding motor (403) is powered by an external power source. The output shaft of the traction drive motor (411) is connected to one end of a traction rod (412). The traction drive motor (411) is powered by an external power source. A rubber ring is sleeved on the outside of the traction conveyor wheel (413). The swing rotating top block (419) and the swing lever (420) are located on the same vertical plane.

7. A manufacturing process for rigid mineral-insulated fire-resistant cables, wherein the process for manufacturing equipment for rigid mineral-insulated fire-resistant cables according to claim 6 is characterized in that: Includes the following steps: S1. The conductor body (5) and copper strip are fed from the top of the continuous conveyor (1) into the transverse bending frame (323), and are clamped and conveyed by the bending conveyor roller (326) to bend the copper strip into a U-shape. S2. By using the material feeding connection channel (314), uniform conveying pipe (315) and feeding arc plate (316) in combination, magnesium oxide powder is fed between the conductor and copper strip during the bending conveying process. S3. Then the conductor body (5) passes through the inside of the positioning clamping cylinder (330), the copper strip passes through the outside of the positioning clamping cylinder (330), and is clamped and positioned. Then it is clamped between the bending cylinder wheels (327), bent to form a copper tube, and the gap is welded by the high-frequency argon arc welding head (329). S4. The welded copper strip passes through the grinding and impurity removal box (401), and the welded protrusions are ground by the cooperation of the high-efficiency grinding motor (403), the inner cross shaft (402), the cross support rod (405) and the polishing wheel (406). S5. Using the cooperation of the traction conveyor wheel (413) and the traction drive motor (411), the formed cable is clamped and conveyed, and then the swing rotating top block (419) pushes the swing pawl (420), the swing rotating shaft (416) and the swing hammer rod (417) to rotate and open.

8. The manufacturing process of a rigid mineral-insulated fire-resistant cable according to claim 7, characterized in that: The bending angle of the copper strip in S1 is controlled between 80° and 120°. The filling rate of the S2 magnesium oxide powder is 1.0 to 2.5 kg / min. During the filling process, the conductor temperature is kept below 60°C, and the magnesium oxide powder is used after being dried at 150°C to 200°C. The welding current for the S3 high-frequency argon arc welding is controlled at 180–220A, and the welding speed is 8–12 m / min to ensure a dense weld and minimal welding stress.

9. The manufacturing process of a rigid mineral-insulated fire-resistant cable according to claim 8, characterized in that: The linear speed of the S5 traction conveyor wheel is 5-10 m / min, and the traction tension is maintained at 40-60 N. The frequency of swinging and hammering should be controlled at 100 to 300 times / min, and the hammering angle should be 15° to 30°.

10. A rigid mineral-insulated fire-resistant cable, the rigid mineral-insulated fire-resistant cable manufactured according to the manufacturing process of a rigid mineral-insulated fire-resistant cable according to claim 9, characterized in that: The outer side of the conductor body (5) is fitted with a flame-retardant inner sheath (6), the outer side of the conductor body (5) is fitted with a copper strip body (7), the inner wall of the copper strip body (7) is fitted with a flame-retardant outer sheath (8), and the inner wall of the flame-retardant outer sheath (8) and the outer side of the flame-retardant inner sheath (6) are both fitted with a reinforcing wire frame (9). A magnesium oxide powder filling layer (10) is filled between the flame-retardant inner sheath (6) and the flame-retardant outer sheath (8). Both ends of the outer side of the conductor body (5) are movably fitted with external threaded sleeves (11). An internal threaded cylinder (12) is threadedly fitted to the outer side of the external threaded sleeve (11), and a sealing waterproof ring (13) is connected to the internal threaded cylinder (12). A sealing wrapping tape (14) is wound around the outer side of the conductor body (5) on the side corresponding to the external threaded sleeve (11).

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