Composite insulator core rod pre-drying device

Abstract

The invention discloses a composite insulator core rod pre-drying device, and relates to the related technical field of composite insulator core rods, the composite insulator core rod pre-drying device comprises a pre-drying oven main body and a door curtain assembly, the door curtain assembly comprises an arc-shaped groove and a liftable baffle, a sliding block is welded to the side edge of the outer wall of the liftable baffle, the sliding block is embedded in a guide rail groove, and the arc-shaped groove is formed in the side edge of the arc-shaped groove. The liftable baffle is slidably connected to the edge of the inlet and outlet of the pre-drying oven body through a guide rail, and the top end of the liftable baffle is rigidly connected with the end of a piston rod of the air cylinder through a connecting plate. The lifting baffle is driven by the air cylinder and provided with the arc-shaped groove, so that the pre-drying device is rapidly started and stopped, the problems of poor sealing performance and heat loss caused by shape mismatching of the baffle are solved, the heat preservation performance of the pre-drying oven is improved, and meanwhile, the positioning precision and operation convenience of core rod placement are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite insulator core rods, and specifically to a pre-baking device for composite insulator core rods. Background Technique

[0002] The composite insulator core rod is the core component of the composite insulator, usually made of glass fiber reinforced resin-based composite material. The core rod may absorb moisture during storage or production, and needs to be preheated to avoid generating bubbles or reducing the material strength during subsequent curing. At the same time, it can activate the activity of the adhesive and enhance the interfacial adhesion. However, at present, it is difficult for the hot air circulation oven to achieve temperature uniformity in the axial and radial directions of the core rod, resulting in stress or inconsistent curing degree inside the material due to temperature difference, directly affecting the mechanical performance stability of the insulator. Moreover, most production lines still adopt manual loading and unloading or off-line preheating modes, restricting the improvement of production efficiency.

[0003] Therefore, it is very necessary to propose a pre-baking device for composite insulator core rods in this application to solve the problems in the background.

[0004] Patent CN104036890B discloses a composite insulator heating and injection integrated system. The above patent realizes direct injection of the core rod after preheating, which can minimize heat loss and improve the adhesion between the core rod and the umbrella skirt.

[0005] In the above patent, through the design of direct injection after preheating of the core rod, heat loss is effectively reduced, and the adhesion between the core rod and the umbrella skirt is significantly improved. At the same time, with the continuous upgrading of the industry's demand for production refinement and automation, there is still room for technical improvement in aspects such as equipment structure optimization, heat preservation performance deepening, and automation control accuracy in the pre-baking link.

[0006] Therefore, this application proposes a pre-baking device for composite insulator core rods that can realize a liftable baffle driven by a cylinder with an arc-shaped groove, and the controller is linked with the upper cover and the hinge structure to enhance the sealing performance and the core rod positioning accuracy while quickly opening and closing the device. Summary of the Invention

[0007] The purpose of the present invention is to provide a pre-baking device for composite insulator core rods to solve the technical problems in the above background technique that it is difficult for the hot air circulation oven to achieve temperature uniformity in the axial and radial directions of the core rod, resulting in stress or inconsistent curing degree inside the material due to temperature difference, directly affecting the mechanical performance stability of the insulator, and most production lines still adopt manual loading and unloading or off-line preheating modes, restricting the improvement of production efficiency.

[0008] To achieve the above object, the present invention provides the following technical solution: a pre-baking device for a composite insulator core rod, comprising a pre-baking oven main body and a curtain assembly. The curtain assemblies are respectively arranged on both sides of the outer wall of the pre-baking oven main body. The two ends of a guide rail are vertically and fixedly installed at the edge of the inlet and outlet of the pre-baking oven main body through bolts; The curtain assembly includes an arc-shaped groove and a liftable baffle. The arc-shaped groove is opened at the bottom of the liftable baffle. A sliding block is welded to the outer wall side edge of the liftable baffle. The sliding block is embedded in the guide rail groove. The liftable baffle is slidably connected to the edge of the inlet and outlet of the pre-baking oven main body through the guide rail. The top end of the liftable baffle is rigidly connected to the piston rod end of a cylinder through a connecting plate.

[0009] Preferably, a heating cavity is arranged inside the pre-baking oven main body. A metal support is arranged at the bottom of the heating cavity. Parallel distributed heating tubes are arranged at the top of the outer wall of the metal support. A perforated metal plate is arranged at the top of the heating tubes. The perforated metal plate is welded to both sides of the inner wall of the pre-baking oven main body; An air duct is formed between the perforated metal plate and the bottom of the heating cavity. The air duct communicates with the outside of the pre-baking oven main body.

[0010] Preferably, an upper cover is fixedly installed at the top of the outer wall of the pre-baking oven main body. Grating sensors are symmetrically installed on both sides of the outer wall of the upper cover. A controller is fixedly installed at the front end of the outer wall of the pre-baking oven main body; The upper cover is rotatably connected to the pre-baking oven main body through a hinge. The grating sensors are electrically connected to the controller through data lines. The fixed end of the hinge is welded to the top edge of the pre-baking oven main body.

[0011] Preferably, the arc-shaped groove of the curtain assembly is arranged as a semi-circular groove. The radian of the arc-shaped groove is matched with the outer diameter of the composite insulator core rod. A sealing strip is fixedly installed at the bottom end of the outer wall of the liftable baffle. The sealing strip contacts the bottom end of the inner wall of the pre-baking oven main body to form a closed space; A slide rail groove is opened on the outer wall side of the liftable baffle. A ball bearing is arranged in cooperation with the slide rail groove. The cross section of the slide rail groove is a T-shaped structure. The ball bearing is embedded in the inner wall of the guide rail of the curtain assembly.

[0012] Preferably, a cylinder lifting mechanism is fixedly installed on one side of the outer wall of the pre-baking oven main body. The cylinder lifting mechanism includes a base, a vertical cylinder and a tray. A horizontal adjusting bolt is arranged at the top of the base. A rubber pad is arranged at the end of the horizontal adjusting bolt. The rubber pad contacts the ground to form an anti-slip support; The outer wall of the base is fixedly installed on the side of the outer wall of the pre-baking oven main body. The vertical cylinder is vertically and fixedly installed on the top of the outer wall of the base through bolts. The piston rod of the vertical cylinder extends upward in the vertical direction. An installation plate is arranged at the end of the piston rod. The tray is fixedly installed at the top of the piston rod through the installation plate. The tray is arranged as a circular plate. The central axis of the tray is on the same vertical axis as the axis of the arc-shaped groove of the curtain assembly.

[0013] Preferably, the outer surface of the tray is provided with anti-slip lines, and positioning bumps are fixedly installed on the four peripheral edges of the outer wall of the tray. The positioning bumps are connected to the end of the composite insulator core rod by snap connection.

[0014] Preferably, casters are movably installed at the four corners of the bottom of the outer wall of the pre-oven main body. The casters are detachably connected to the bottom plate of the pre-oven main body by bolts. The wheel bodies of the casters are of a universal wheel structure. A high-temperature resistant reflective coating is coated on the inner wall of the pre-oven main body, and the reflective coating covers the area facing the heating tube.

[0015] Preferably, diversion holes are evenly distributed on the surface of the perforated metal plate. The diameter of the diversion holes gradually increases along the air flow direction of the air duct. The axis of the diversion hole forms a 45° angle with the extension direction of the heating tube.

[0016] Preferably, the controller is fixedly installed on the right side of the outer wall of the pre-oven main body through a metal bracket. The display screen and operation buttons of the controller are embedded in the same panel, and a heat insulation layer is provided between the panel and the outer wall of the pre-oven main body.

[0017] Preferably, both ends of the heating tube are connected to the metal bracket by clamps. Heat dissipation fins are welded to the bottom of the metal bracket, and the heat dissipation fins extend to the outside of the inner wall bottom plate of the pre-oven main body.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, the liftable baffle is driven by a cylinder and the liftable baffle is provided with an arc-shaped groove, so as to realize the quick opening and closing of the pre-baking device, solve the problems of poor sealing and heat loss caused by the mismatched shape of the baffle, improve the heat preservation performance of the pre-oven, and at the same time improve the positioning accuracy and operation convenience of the core rod placement; 2. In the present invention, the controller is linked with the upper cover and the upper cover is hinged to the box body, so as to realize the automatic monitoring of the operation area and the timed automatic opening of the cover, solve the problem of the risk of mechanical misoperation of the equipment, effectively prevent personal injury caused by the accidental closing or opening of the upper cover, reduce the operation risk, and at the same time avoid the temperature fluctuation caused by human intervention; 3. In the present invention, the height of the tray is adjusted by a vertical cylinder to mechanically position the position of the core rod, solve the problems of poor sealing or uneven heating, improve the installation efficiency and position accuracy of the core rod, and reduce the manual adjustment time; 4. In the present invention, by setting tapered diversion holes on the surface of the perforated metal plate, the temperature uniformity in the box body is realized, the problems of local overheating or uneven temperature are solved, the preheating quality of the core rod is improved, and the risk of material performance deterioration caused by uneven heating is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of the present invention; Figure 2 Schematic cross-sectional structure diagram of the present invention; Figure 3 Schematic structure diagram of the curtain assembly of the present invention; Figure 4 Schematic structure diagram of the liftable baffle of the present invention; Figure 5 Schematic structure diagram of the arc groove of the present invention; Figure 6 Schematic structure diagram of the cylinder lifting mechanism of the present invention; Figure 7 Schematic structure diagram of the heating cavity of the present invention; Figure 8 Schematic structure diagram of the heating tube of the present invention.

[0020] In the figure: 1. Pre-oven main body; 2. Slide rail groove; 3. Heating tube; 4. Perforated metal plate; 5. Air duct; 6. Curtain assembly; 7. Cylinder; 8. Upper cover; 9. Grating sensor; 10. Controller; 11. Composite insulator core rod; 12. Cylinder lifting mechanism; 13. Caster; 14. Reflective coating; 15. Arc groove; 16. Liftable baffle; 17. Guide rail; 18. Sealing strip; 19. Base; 20. Vertical cylinder; 21. Tray; 22. Positioning lug; 23. Metal bracket; 24. Clamp; 25. Heat sink. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "equipped with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and 8 , an embodiment provided by the present invention: a pre-baking device for a composite insulator core rod, including a pre-baking oven main body 1 and a curtain assembly 6. The curtain assembly 6 is respectively arranged on both sides of the outer wall of the pre-baking oven main body 1. The two ends of a guide rail 17 are vertically and fixedly installed at the edge of the inlet and outlet of the pre-baking oven main body 1 through bolts; the curtain assembly 6 includes an arc-shaped groove 15 and a liftable baffle 16. The arc-shaped groove 15 is opened at the bottom of the liftable baffle 16. A sliding block is welded to the outer wall side edge of the liftable baffle 16. The sliding block is embedded in the groove of the guide rail 17. The liftable baffle 16 is slidably connected to the edge of the inlet and outlet of the pre-baking oven main body 1 through the guide rail 17. The top end of the liftable baffle 16 is rigidly connected to the piston rod end of a cylinder 7 through a connecting plate; Both ends of the heating tube 3 are connected to a metal bracket 23 through a clamp 24. A heat sink 25 is welded to the bottom of the metal bracket 23. The heat sink 25 extends to the outside of the inner wall bottom plate of the pre-baking oven main body 1; Further, first, the liftable baffle 16 forms a sliding pair with the T-shaped groove of the guide rail 17 through a T-shaped sliding block welded to the side edge. The piston rod of the cylinder 7 rigidly pulls the liftable baffle 16 to move vertically. When the liftable baffle 16 descends to the closed position, the bottom sealing strip 18 is pressed against the threshold of the pre-baking oven to form an elastic sealing interface. The sealing strip 18 is made of high-temperature resistant silica gel. The cross-section of the sealing strip 18 is a hollow corrugated structure to enhance the deformation compensation ability; when the baffle rises, an adaptive gap is formed between the arc-shaped groove 15 and the outer diameter of the core rod to reduce heat leakage; the guide rail 17 is vertically fixed along the edge of the inlet and outlet of the pre-baking oven main body 1. Casters 13 are installed at the bottom of the pre-baking oven main body 1. The universal wheel structure of the casters 13 can rotate flexibly. Check the connection of the inspection upper cover 8 to the pre-baking oven main body 1 through a hinge, the opening and closing of the upper cover 8, the electrical connection between the controller 10 and the grating sensor 9, and the horizontal adjustment bolts and rubber pads of the base 19 of the cylinder jacking mechanism 12; Then, place the composite insulator core rod 11 on the tray 21 of the cylinder lifting mechanism 12. Since the outer surface of the tray 21 has anti-slip patterns and the positioning bumps 22 on the four peripheral edges are connected to the end of the composite insulator core rod 11 by snap connection, the stable placement of the core rod can be ensured. Start the controller 10 and set the parameters for pre-drying, such as temperature, time, etc., through the operation buttons. Subsequently, the heating tubes 3 on the metal bracket 23 at the bottom of the heating cavity generate heat. The outside air enters from the air duct 5, and after being heated by the heating tubes 3, the hot air enters the pre-drying oven main body 1 through the diversion holes on the perforated metal plate 4 to pre-dry the composite insulator core rod 11. Since the diameter of the diversion holes gradually increases along the air flow direction of the air duct 5 and the axis forms a 45° angle with the extension direction of the heating tubes 3, the hot air is more evenly distributed in the pre-drying oven main body 1. At the same time, the piston rod of the cylinder 7 drives the liftable baffle 16 to descend along the guide rail 17, and the sealing strip 18 at the bottom end of the liftable baffle 16 contacts the inner wall bottom end of the pre-drying oven main body 1 to form a closed space, reducing heat dissipation. When a person or an object approaches the inlet and outlet of the pre-drying oven main body 1, the grating sensor 9 senses it and transmits the signal to the controller 10, and the controller 10 pauses heating or gives an alarm; Finally, the controller 10 issues a prompt signal indicating the completion of pre-drying. The piston rod of the cylinder 7 drives the liftable baffle 16 to rise, opening the inlet and outlet. The piston rod of the vertical cylinder 20 of the cylinder lifting mechanism 12 rises to eject the composite insulator core rod 11, and the equipment is shut down. The liftable baffle 16 is provided in three models. The first model has two arc-shaped slots 15 with a slot length of 160 mm and a center point spacing of 300 mm; the second model has two arc-shaped slots 15 with a slot length of 80 mm and a center point spacing of 300 mm; the third model has one arc-shaped slot 15 with a slot length of 370 mm.

[0025] Please refer to Figure 1 、 Figure 3 、 Figure 5 、 Figure 6 and Figure 7 For an embodiment provided by the present invention: a pre-drying device for a composite insulator core rod, a cylinder lifting mechanism 12 is fixedly installed on one side of the outer wall of the pre-drying oven main body 1. The cylinder lifting mechanism 12 includes a base 19, a vertical cylinder 20 and a tray 21. A horizontal adjustment bolt is provided at the top end of the base 19, and a rubber pad is provided at the end of the horizontal adjustment bolt. The rubber pad contacts the ground to form an anti-slip support; the outer wall of the base 19 is fixedly installed on the side surface of the outer wall of the pre-drying oven main body 1. The vertical cylinder 20 is vertically fixedly installed on the top end of the outer wall of the base 19 through bolts. The piston rod of the vertical cylinder 20 extends vertically upward, and an installation plate is provided at the end of the piston rod. The tray 21 is fixedly installed on the top end of the piston rod through the installation plate. The tray 21 is set as a circular plate, and the central axis of the tray 21 is on the same vertical axis as the axis of the arc-shaped slot 15 of the curtain assembly 6; The outer surface of the tray 21 is provided with anti-slip lines, and positioning bumps 22 are fixedly installed on the four peripheral edges of the outer wall of the tray 21. The positioning bumps 22 are connected to the end of the composite insulator core rod 11 by snap connection; Further, first, the universal wheels of the casters 13 allow multi-directional movement and are fixed by wheel brakes after reaching the position. Check the alignment state of the axis of the tray 21 of the curtain assembly 6 and the cylinder lifting mechanism 12: The liftable baffle 16 is driven by the cylinder 7 to vertically lift along the guide rail 17. At this time, it is only necessary that the T-shaped slide rail groove 2 embedded in the guide rail 17 cooperates smoothly with the ball bearing; Use a level to detect the levelness of the base 19 of the cylinder lifting mechanism 12, and rotate the horizontal adjustment bolt at the top of the base 19 to make the rubber pad closely contact the ground until the bubble is centered to form an anti-slip support. At this time, the axis of the arc groove 15 of the curtain assembly 6 and the central axis of the tray 21 are in the same vertical plane, and the semi-circular contour of the arc groove 15 matches the annular groove provided at the end of the composite insulator core rod 11; Then, for the core rod clamping, align the annular groove at the end of the composite insulator core rod 11 with the positioning bump 22 on the edge of the tray 21, and use the interference fit of the positioning bump 22 to achieve snap fixation. The anti-slip lines on the surface of the tray 21 increase the friction force to prevent the core rod from sliding. Start the vertical cylinder 20 through the controller 10. The piston rod of the vertical cylinder 20 drives the tray 21 to rise in the vertical direction. The core rod passes through the arc groove 15 of the curtain assembly 6 and enters the pre-oven main body 1. During this process, the grating sensor 9 real-time monitors the position of the top of the core rod. When it detects that the core rod completely enters the heating cavity, there is a photoelectric conversion circuit inside the grating sensor 9, and the converted electrical signal will be transmitted to the controller 10 through the cable. After receiving the signal, the controller 10 outputs a control signal according to the program logic to energize the coil of the solenoid valve, thereby changing the position of the valve core of the solenoid valve, allowing compressed air to enter the cylinder 7, thereby triggering the action of the cylinder 7. The cylinder 7 generates linear motion through the expansion and contraction of the piston rod, and then drives the liftable baffle 16 to move down along the guide rail 17, so that the sealing strip 18 is pressed against the bottom of the pre-oven main body 1 to form a closed space. At this time, the ball bearing in the slide rail groove 2 rolls in contact with the inner wall of the guide rail 17, making the baffle lift with low resistance and no jamming; Then, the heating tube 3 is energized to generate heat. The heat dissipation fins 25 at the bottom of the metal bracket 23 transfer and export the excess heat from the box body. The hot air forms a directional air flow through the diversion holes of the perforated metal plate 4. The diameter of the diversion holes gradually increases along the air flow direction of the air duct 5, and the axis of the holes is designed at a 45° angle with the heating tube 3, so that the hot air forms a spiral upward air flow to evenly wrap the surface of the core rod. The high-temperature reflective coating 14 reflects the heat radiated by the heating tube 3 to the core rod, improving the thermal efficiency; Finally, after pre-baking is completed, the controller 10 outputs a current signal to the solenoid valve. The switching of the working position of the solenoid valve changes the flow direction of the compressed air, causing the compressed air to enter the rodless chamber of the vertical cylinder 20, which is the side where the piston rod extends. At the same time, the gas in the rod chamber, which is the side where the piston rod is located, is discharged, thereby retracting the piston rod of the vertical cylinder 20. A limit switch is installed at the initial position of the vertical cylinder 20. The piston rod of the vertical cylinder 20 drives the mandrel to descend to the initial position through a coupling. Two connecting rods are respectively connected to the end of the piston rod of the vertical cylinder 20 and both sides of the liftable baffle 16. The connecting rods drive the liftable baffle 16 to move upward synchronously to open the channel, and then lubricating oil is applied to the surface of the positioning convex block 22 to release the clamping and remove the mandrel.

[0026] Please refer to Figure 1 and Figure 8 As shown in [relevant figures] and [relevant figures], an embodiment provided by the present invention is: a pre-baking device for a composite insulator mandrel. At the top end of the outer wall of the pre-baking oven main body 1, an upper cover 8 is fixedly installed. On both sides of the outer wall of the upper cover 8, grating sensors 9 are symmetrically installed. At the front end of the outer wall of the pre-baking oven main body 1, a controller 10 is fixedly installed; the upper cover 8 is rotatably connected to the pre-baking oven main body 1 through a hinge, and the grating sensors 9 are electrically connected to the controller 10 through data lines. The fixed end of the hinge is welded to the top edge of the pre-baking oven main body 1; The controller 10 is fixedly installed on the right side of the outer wall of the pre-baking oven main body 1 through a metal bracket 23. The display screen and operation buttons of the controller 10 are embedded in the same panel, and a heat insulation layer is provided between the panel and the outer wall of the pre-baking oven main body 1; Furthermore, first, an electromagnetic lock is fixedly installed at the closing position of the upper cover 8: the lock body of the electromagnetic lock is embedded in the inner edge of the upper cover 8, and a magnetic adsorption plate is provided corresponding to the top of the pre-baking oven main body 1. The electromagnetic lock is connected to the relay of the controller 10 through an independent circuit and is controlled by the program of the controller 10 to be powered on / off. A three-stage linkage protection logic program is embedded in the controller 10: first, cut off the power supply of the heating tube 3 to stop heating, second, pause the lifting action of the cylinder 7, and third, maintain the power supply of the electromagnetic lock to ensure that the upper cover 8 remains airtight; Then, set the pre-drying parameters on the touch screen of the controller 10. After starting, the heating tube 3 is energized and heated. The heat forms a 45° oblique airflow through the diversion holes of the perforated metal plate 4, and cooperates with the hot air circulation in the air duct 5. The high-temperature resistant reflective coating 14 concentrates and reflects the radiant heat to the mandrel area, and the heat sinks 25 at the bottom of the metal bracket 23 simultaneously dissipate heat. The tray 21 is clamped and fixed to the composite insulator mandrel 11 through the positioning bumps 22. The vertical cylinder 20 uses the pressure of compressed air to push the piston to move linearly to adjust the height of the mandrel, so that the axis of the mandrel is aligned with the arc-shaped groove 15 of the curtain assembly 6. When a person or an object approaches the entrance and exit, the grating sensor 9 senses it and transmits the signal to the controller 10. The controller 10 executes the three-stage linkage protection logic program to keep the electromagnetic lock energized and the upper cover 8 in the locked state. When the pre-drying time arrives and the grating sensor 9 is unobstructed, the controller 10 is powered off; Finally, the rotational motion of the motor is converted into the mechanical energy of the chain drive of the upper cover 8 to open the upper cover 8. The liftable baffle 16 is driven by the cylinder 7 to rise along the guide rail 17. The ball bearings in the T-shaped slide rail groove 2 ensure smooth lifting. After the tray 21 is lowered to the limit position by sending a control signal through the solenoid valve of the vertical cylinder 20, lubricating oil is applied to the surface of the positioning bump 22 to release the clamping and take out the pre-dried mandrel.

[0027] Please refer to Figure 1 、 Figure 3 and Figure 6 As shown in FIG. Further, first, rotate the horizontal adjustment bolt so that the rubber pad of the base 19 touches the ground, and then start the controller 10 to set the pre-drying temperature parameter; Then, the vertical cylinder 20 drives the tray 21 to rise to the same axis height as the arc-shaped groove 15. The end of the mandrel is embedded in the card slot of the positioning bump 22, and the anti-slip pattern prevents displacement. The other end of the mandrel passes through the arc-shaped grooves 15 of the two side curtain assemblies 6 to form a horizontally suspended state. The controller 10 triggers the cylinder 7 to act, and the piston rod drives the liftable baffle 16 to move down along the guide rail 17 through the connecting plate. The ball bearings in the T-shaped slide rail groove 2 reduce the frictional resistance, and the sealing strip 18 at the bottom of the baffle is pressed against the bottom of the pre-drying oven to form a sealed cavity; Finally, the heating tube 3 is electrified to generate heat, and the heat is transferred to the surroundings through the metal bracket 23. The outside air enters the inside of the pre-oven main body 1 from the air duct 5. Since the air duct 5 is connected to the outside of the pre-oven main body 1, the end of the air duct 5 can also be connected to a centrifugal fan for forced air circulation. The air is heated into hot air when passing through the heating tube 3 during the entry process. The hot air enters the pre-oven main body 1 through the diversion holes on the perforated metal plate 4 to pre-dry the composite insulator core rod 11. Since the diameter of the diversion holes gradually increases along the air flow direction of the air duct 5 and the axis forms a 45° angle with the extension direction of the heating tube 3, the hot air is more evenly distributed in the pre-oven main body 1. At the same time, the high-temperature resistant reflective coating 14 coated on the inner wall of the pre-oven main body 1 can reflect part of the heat back into the pre-oven main body 1 to reduce heat loss.

[0028] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 For an embodiment provided by the present invention: a pre-drying device for a composite insulator core rod, the arc-shaped groove 15 of the curtain assembly 6 is set as a semi-circular groove, and the radian of the arc-shaped groove 15 is matched with the outer diameter of the composite insulator core rod 11. A sealing strip 18 is fixedly installed at the bottom end of the outer wall of the liftable baffle 16, and the sealing strip 18 contacts the bottom end of the inner wall of the pre-oven main body 1 to form a closed space; a slide rail groove 2 is opened on the side surface of the outer wall of the liftable baffle 16, and a ball bearing is arranged in cooperation with the slide rail groove 2. The cross-section of the slide rail groove 2 is a T-shaped structure, and the ball bearing is embedded in the inner wall of the guide rail 17 of the curtain assembly 6; Four corners of the bottom of the outer wall of the pre-oven main body 1 are movably installed with casters 13. The casters 13 are detachably connected to the bottom plate of the pre-oven main body 1 by bolts. The wheel body of the casters 13 is set as a universal wheel structure. The inner wall of the pre-oven main body 1 is coated with a high-temperature resistant reflective coating 14, and the reflective coating 14 covers the area opposite to the heating tube 3; Further, first, the controller 10 starts the cylinder 7, and the piston rod contracts upward, driving the liftable baffle 16 to vertically rise along the guide rail 17. At this time, the ball bearing embedded in the slide rail groove 2 of the curtain assembly 6 ensures smooth sliding, and the T-shaped cross-section structure of the guide rail 17 prevents the baffle from shifting. After the liftable baffle 16 is completely raised, the inlet and outlet of the pre-oven main body 1 are completely opened; Then, the composite insulator core rod 11 is placed horizontally on the tray 21, and the anti-skid pattern on the surface of the tray is used to prevent sliding. The end of the core rod is embedded in the positioning protrusions 22 around the tray 21 to ensure axial alignment. Then, the vertical cylinder 20 is started by the controller 10, and the piston rod of the vertical cylinder 20 rises, and the height of the core rod is adjusted to coincide with the axis of the arc groove 15 of the door curtain assembly 6; the controller 10 controls the piston rod of the cylinder 7 to press down, and the lifting baffle 16 is lowered to the bottom along the guide rail 17, and the sealing strip 18 at the bottom end of the baffle is in close contact with the bottom end of the inner wall of the pre-oven body 1 to form a closed space; the controller 10 starts the heating tube 3, and the heat is conducted to the perforated metal plate 4 through the metal bracket 23, and the high-temperature resistant reflective coating 14 on the inner wall of the pre-oven reflects the heat to the surface of the core rod. During the heating process, the air duct 5 introduces airflow through an external air source, and the airflow is evenly diffused along the guide hole at an angle of 45°; Finally, the pre-baking is completed, and the controller 10 sends an electrical signal to the solenoid valve when the set time is over. The solenoid valve core turns to change the direction of the air path, and the compressed air enters the rodless chamber of the cylinder 7 through the solenoid valve, pushing the piston to move upward under the action of air pressure to raise the liftable baffle 16. The limit switch on the cylinder 7 sends an in-position signal to the controller 10. After receiving the in-position signal, the controller 10 cuts off the power supply of the solenoid valve, resets the solenoid valve, and stops the movement of the cylinder 7. The piston rod is directly fixed to the tray 21, pulling the tray 21 to drop synchronously.

[0029] Working principle: First, the height of the tray 21 is adjusted by the vertical cylinder 20 to align the axis of the composite insulator core rod 11 with the arc groove of the door curtain assembly 6. Then, the cylinder 7 drives the liftable baffle 16 of the door curtain assembly 6 to rise along the guide rail 17, and the core rod enters the pre-oven with the tray 21. After the door curtain is closed, a closed space is formed with the box body through the sealing strip 18 to reduce heat loss.

[0030] Then, the heating tube 3 inside the pre-oven is started, and the heat is evenly transferred to the heating cavity. At the same time, the air duct 5 cooperates with the perforated metal plate 4 to guide the airflow circulation by using the gradual aperture and inclination angle of the guide hole to make the temperature distribution in the box uniform. During the continuous heating process of the mandrel, the high temperature resistant reflective coating 14 further reduces the heat loss.

[0031] Finally, when the preset heating time is over, the controller 10 detects the external environment through the grating sensor 9. The grating sensor 9 forms an infrared light curtain on both sides of the upper cover 8. If no person approaches, the cylinder 7 drives the upper cover 8 to open automatically; if the infrared sensor is triggered, the operation is suspended to ensure safety; after preheating is completed, the cylinder lifting mechanism 12 lowers the core rod, the door curtain rises, and the operator takes out the core rod.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Thus, all changes that fall within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A composite insulator core rod pre-baking device, characterized in that: It comprises a pre-oven main body (1) and a door curtain assembly (6), wherein the door curtain assemblies (6) are respectively arranged on both sides of the outer wall of the pre-oven main body (1), and the two ends of the guide rails (17) are vertically fixed at the inlet and outlet edges of the pre-oven main body (1) by bolts; The door curtain assembly (6) comprises an arc groove (15) and a liftable baffle (16); the bottom of the liftable baffle (16) is provided with an arc groove (15); a sliding block is welded to the side edge of the outer wall of the liftable baffle (16); the sliding block is embedded in the groove of the guide rail (17); the liftable baffle (16) is slidably connected to the inlet and outlet edges of the pre-oven body (1) via the guide rail (17); and the top end of the liftable baffle (16) is rigidly connected to the piston rod end of the cylinder (7) via a connecting plate.

2. A composite insulator core rod pre-baking device according to claim 1, characterized in that: A heating cavity is arranged inside the pre-oven body (1), a metal bracket (23) is arranged at the bottom of the heating cavity, parallel heating tubes (3) are arranged at the top of the outer wall of the metal bracket (23), a perforated metal plate (4) is arranged at the top of the heating tube (3), and the perforated metal plate (4) is welded to both sides of the inner wall of the pre-oven body (1); An air duct (5) is formed between the perforated metal plate (4) and the bottom of the heating cavity, and the air duct (5) is connected to the outside of the pre-oven main body (1).

3. The composite insulator core rod pre-baking device according to claim 1, characterized in that: An upper cover (8) is fixedly mounted on the top of the outer wall of the pre-oven body (1), grating sensors (9) are symmetrically mounted on the edges of both sides of the outer wall of the upper cover (8), and a controller (10) is fixedly mounted on the front end of the outer wall of the pre-oven body (1); The upper cover (8) is rotatably connected to the pre-oven body (1) via a hinge, the grating sensor (9) is electrically connected to the controller (10) via a data line, and the fixed end of the hinge is welded to the top edge of the pre-oven body (1).

4. A composite insulator core rod pre-baking device according to claim 1, characterized in that: The arc groove (15) of the door curtain assembly (6) is configured as a semicircular groove, the curvature of the arc groove (15) matches the outer diameter of the composite insulator core rod (11), a sealing strip (18) is fixedly mounted on the bottom end of the outer wall of the liftable baffle (16), and the sealing strip (18) contacts the bottom end of the inner wall of the pre-oven body (1) to form a closed space; A slide rail groove (2) is provided on the side surface of the outer wall of the liftable baffle (16), and a ball bearing is provided in cooperation with the slide rail groove (2). The cross section of the slide rail groove (2) is a T-shaped structure, and the ball bearing is embedded in the inner wall of the guide rail (17) of the door curtain assembly (6).

5. The composite insulator core rod pre-baking device according to claim 1, characterized in that: A cylinder lifting mechanism (12) is fixedly mounted on one side of the outer wall of the pre-oven body (1), the cylinder lifting mechanism (12) comprising a base (19), a vertical cylinder (20) and a tray (21), a horizontal adjustment bolt is arranged at the top of the base (19), a rubber pad is arranged at the end of the horizontal adjustment bolt, and the rubber pad contacts the ground to form an anti-slip support; The outer wall of the base (19) is fixedly mounted on the outer wall side of the pre-oven body (1), and the vertical cylinder (20) is vertically fixedly mounted on the top of the outer wall of the base (19) by bolts. The piston rod of the vertical cylinder (20) extends upward in the vertical direction, and a mounting plate is provided at the end of the piston rod. The tray (21) is fixedly mounted on the top of the piston rod by the mounting plate. The tray (21) is configured to be a circular plate, and the central axis of the tray (21) and the axis of the arc groove (15) of the door curtain assembly (6) are on the same vertical axis.

6. A composite insulator core rod pre-baking device according to claim 5, characterized in that: The outer surface of the tray (21) is provided with anti-slip patterns, and positioning protrusions (22) are fixedly mounted on the edges of the outer wall of the tray (21), and the positioning protrusions (22) are connected to the end of the composite insulator core rod (11) by snapping.

7. The composite insulator core rod pre-baking device according to claim 1, characterized in that: Casters (13) are movably mounted at the four corners of the bottom of the outer wall of the pre-oven body (1); the casters (13) are detachably connected to the bottom plate of the pre-oven body (1) via bolts; the wheel body of the casters (13) is configured as a universal wheel structure; the inner wall of the pre-oven body (1) is coated with a high-temperature resistant reflective coating (14); the reflective coating (14) covers the area directly facing the heating tube (3).

8. The composite insulator core rod pre-baking device according to claim 2, characterized in that: The surface of the perforated metal plate (4) is evenly distributed with guide holes, the diameter of the guide holes gradually increases along the airflow direction of the air duct (5), and the axis of the guide holes forms an angle of 45° with the extension direction of the heating tube (3).

9. The composite insulator core rod pre-baking device according to claim 3, characterized in that: The controller (10) is fixedly mounted on the right side of the outer wall of the pre-oven body (1) via a metal bracket (23); a display screen and operation buttons of the controller (10) are embedded in the same panel; and a heat insulating layer is provided between the panel and the outer wall of the pre-oven body (1).

10. The composite insulator core rod pre-baking device according to claim 2, characterized in that: Both ends of the heating tube (3) are connected to the metal bracket (23) via clamps (24); a heat sink (25) is welded to the bottom of the metal bracket (23); the heat sink (25) extends to the outside of the inner wall bottom plate of the pre-oven body (1).

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