Segmented heating device and segmented heating method for large-length composite insulator

Abstract

The invention belongs to the technical field of insulator processing, and relates to a segmented heating device and a segmented heating method for a large-length composite insulator. The segmented heating device comprises an upper drying oven capable of moving horizontally and vertically and a lower drying oven installed on a lower drying oven moving mechanism, the lower drying oven moving mechanism comprises a groove-shaped base, a plurality of jacking mechanism shells are installed in the length direction of the groove-shaped base, and jacking air cylinder push rods and limiting guide rods penetrate through jacking mechanism shell top covers. The lifting supporting plate is connected with the jacking air cylinder push rod and the limiting guide rod, and a groove is formed in the lifting supporting plate. The segmented heating method comprises the steps that the upper drying oven and the lower drying oven are moved to a to-be-heated section for mold closing and heating till the total length of the heating section is matched with the single injection molding length of injection molding equipment, the composite insulator is conveyed to the injection molding equipment for umbrella skirt injection molding, and the composite insulator is moved back to the segmented heating device for heating and umbrella skirt injection molding of other sections. The movable drying oven is adopted, manual carrying is not needed in the heating process of the composite insulator, and the heating efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of insulator processing technology, and particularly relates to a segmented heating device and segmented heating method for long-length composite insulators. Background Technology

[0002] Composite insulators are insulating components consisting of a core rod with silicone rubber skirts on the outside. The skirts are typically manufactured using injection molding. Before injection molding, an adhesion promoter is applied to the surface of the core rod. The core rod with the adhesion promoter is then heated in an oven, and subsequently placed into injection molding equipment for skirt injection molding. Composite insulators are usually quite long, especially ultra-high voltage composite insulators, which can reach lengths of over 12 meters. However, existing injection molding and heating equipment cannot process long composite insulators in one operation; they must be processed in sections.

[0003] Currently, there are the following problems with heating long composite insulators: In the composite insulator manufacturing workshop, heating of the composite insulators is all done manually. Several workers work together to place the section of the core rod to be heated into the heating device, while the unheated sections are supported by brackets. After the first section of the core rod is heated, it is moved forward manually to heat the second section. For long composite insulators, three to four people are needed to move the core rod, which is time-consuming, labor-intensive, and inefficient. In addition, there are a certain amount of volatile polymers from rubber, adhesives, etc., in the composite insulator workshop, which have a certain impact on the health of workers. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention discloses a segmented heating device and method for long-length composite insulators. The technical solution adopted by this invention is as follows: A segmented heating device for long-length composite insulators includes an upper oven and a lower oven. The upper oven is mounted on an upper oven moving mechanism, and the lower oven is mounted on a lower oven moving mechanism. The lower oven moving mechanism includes a slotted base with multiple vertical square holes drilled along its length. A lifting mechanism housing is installed inside the square holes. The cylinder body of a lifting cylinder is located inside the lifting mechanism housing. The push rod of the lifting cylinder and several limiting guide rods pass upward through the top cover of the lifting mechanism housing. The limiting guide rods are distributed around the push rod of the lifting cylinder. The bottom surface of a lifting pallet is connected to the top of the push rod of the lifting cylinder and the top of the limiting guide rods. The top surface of the lifting pallet has several grooves for placing composite insulators. The lower oven moving mechanism can drive the lower oven to move horizontally along the length of the slotted base, and the upper oven moving mechanism can also drive the upper oven to move horizontally along the length of the slotted base. Furthermore, the upper oven moving mechanism can drive the upper oven to move up and down.

[0005] Preferably, the trough base is a U-shaped trough structure fixedly installed on the ground, with lower sliding rails installed on both side plates of the trough base, and a lower sliding rack installed on one side plate of the trough base.

[0006] Preferably, a pair of L-shaped plate structure lower moving frames are fixedly installed on both sides of the lower oven. Multiple lower moving sliders are installed on the bottom outer side of each lower moving frame. The lower moving sliders are slidably connected to the lower moving slide rail. A lower moving motor is installed on the outer side of one of the lower moving frames. A gear three is installed on the shaft of the lower moving motor. The gear three is meshed with the lower moving rack for transmission.

[0007] Preferably, the outer shell of the lifting mechanism is a square metal shell, and the lifting support plate is a metal upright plate.

[0008] Preferably, the upper oven moving mechanism includes a gantry frame, on which a transverse track frame is mounted. The transverse track frame is a square tube with both ends fixed at the middle position of the width direction above the gantry frame. The transverse track frame is provided with two transverse slide rails and one transverse rack. One transverse slide rail is located on the upper surface of the transverse track frame, and the other transverse slide rail is located on the side of the transverse track frame. The transverse rack is located on the side of the transverse track frame.

[0009] Preferably, the transverse connecting seat is slidably connected to the transverse track frame. The transverse connecting seat is a metal seat welded together from angle steel one and angle steel two. Angle steel one is located below angle steel two. The adjacent inner sides of the horizontal and vertical plates of angle steel one are each provided with a transverse sliding block that is slidably connected to the transverse sliding rail. A transverse moving motor is installed on the outer side of the vertical plate of angle steel one. A gear one is installed on the shaft of the transverse moving motor. The gear one is meshed and connected to the transverse rack for transmission.

[0010] Preferably, the vertical track frame is provided with a vertical slide rail and a vertical rack, a vertical slider is provided on angle steel one, a vertical moving motor is provided on angle steel two, the vertical slider is slidably connected to the vertical slide rail, and a gear two is installed on the shaft of the vertical moving motor, the gear two is meshed with the vertical rack for transmission.

[0011] Preferably, both the upper and lower ovens are equipped with electric heating devices, and each electric heating device has two semi-circular heating cavities.

[0012] A method for segmented heating of long-length composite insulators, employing the aforementioned segmented heating device for long-length composite insulators, includes the following steps: The composite insulator is placed in the groove position of several raised lifting plates. The upper oven moving mechanism and the lower oven moving mechanism drive the upper oven and the lower oven to move to the section to be heated, respectively. The upper oven descends and closes with the lower oven. The upper oven and the lower oven are started to continuously heat. After the current section is heated, the upper oven and the lower oven move to the next heating section. The above heating steps are repeated until the total length of the heating section matches the single injection length of the injection molding equipment. After the composite insulator is heated, it is transferred to the injection molding equipment for shed molding of the heated sections. After the shed molding is completed, the composite insulator is transferred back to the segmented heating device, and the other sections are heated and the sheds are molded one by one until the entire composite insulator is processed.

[0013] Preferably, if the moving path of the lower oven or the current section heating position of the composite insulator interferes with the lifting plate, the lifting plate causing the interference will be lowered to a low position before the lower oven moves. After the current section of the composite insulator is heated, the lower oven continues to move, and the previously lowered lifting plate is lifted back to a high position by the lifting cylinder to continue supporting the composite insulator.

[0014] The beneficial effects of this invention are: This invention employs movable upper and lower drying ovens, eliminating the need for manual handling during the heating process of the composite insulator. Heating of the core rod at different positions is achieved by moving the upper and lower drying ovens, thereby improving the heating efficiency of the core rod and avoiding the impact of volatile substances on workers' health. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of the segmented heating device according to Embodiment 1 of the present invention; Figure 2 This is a perspective view of the transverse connecting seat according to Embodiment 1 of the present invention; Figure 3 This is a front view of the transverse connecting seat according to Embodiment 1 of the present invention; Figure 4 This is a top view of the transverse connecting seat according to Embodiment 1 of the present invention; Figure 5 This is a perspective view of the split-type drying oven according to Embodiment 1 of the present invention; Figure 6 This is a perspective view of the lower oven according to Embodiment 1 of the present invention; Figure 7 This is a front view of the lower drying oven according to Embodiment 1 of the present invention; Figure 8This is a partial sectional view of the groove-shaped base according to Embodiment 1 of the present invention; Figure 9 This is a cross-sectional view of the lifting support mechanism according to Embodiment 1 of the present invention; Among them, 1 is the gantry frame, 2 is the transverse track frame, 3 is the transverse slide rail, 4 is the transverse rack, 5 is the transverse connecting seat, 6 is the transverse slider, 7 is the transverse moving motor, 8 is the vertical track frame, 9 is the vertical slide rail, 10 is the vertical rack, 11 is the vertical slider, 12 is the vertical moving motor, 13 is the upper oven, 14 is the lower oven, 15 is the composite insulator, 16 is the slotted base, 17 is the lower slide rail, 18 is the lower rack, 19 is the lower frame, 20 is the lower slider, 21 is the lower motor, 22 is the lifting pallet, 23 is the lifting cylinder, 24 is the limit guide rod, and 25 is the lifting mechanism housing. Detailed Implementation

[0016] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0017] Example 1:

[0018] like Figure 1-9 As shown, Embodiment 1 of the present invention discloses a segmented heating device for long-length composite insulators, including a split-type oven, an upper oven moving mechanism, a lower oven moving mechanism, and a lifting support mechanism.

[0019] The split-type drying oven includes an upper drying oven 13 and a lower drying oven 14. Both the upper drying oven 13 and the lower drying oven 14 are equipped with electric heating devices, each with two semi-circular heating cavities. When the upper drying oven 13 and the lower drying oven 14 are joined together, they form a cylindrical heating cavity. The electric heating devices are then activated to heat the core of the composite insulator 15 within the heating cavity. The split-type drying oven is a mature existing product in the field of insulator processing; its internal structure can be found in Chinese patent CN202839171U, and will not be described further here.

[0020] The upper oven moving mechanism includes a gantry frame 1, on which a transverse track frame 2 is mounted. The transverse track frame 2 is a square tube with both ends fixed at the middle position in the width direction of the gantry frame 1. The transverse track frame 2 is equipped with a transverse sliding rail 3 and a transverse sliding rack 4. A transverse connecting seat 5 is slidably connected to the transverse track frame 2. Specifically, there are two transverse sliding rails 3, one of which is located on the upper surface of the transverse track frame 2, and the other is located on the right side of the transverse track frame 2. There is one transverse sliding rack 4, which is located on the right side of the transverse track frame 2 and above the transverse track frame 2. The transverse connecting seat 5 is a T-shaped metal seat welded from angle steel one and angle steel two, with angle steel one located below angle steel two. A pair of transverse sliding blocks 6, adapted to and slidably connected to the transverse sliding rail 3, are fixedly mounted on adjacent inner surfaces of angle steel one. A transverse moving motor 7 is fixedly installed on the outer surface of the vertical plate of angle steel one. A gear one is mounted on the shaft of the transverse moving motor 7, and the gear one meshes with the transverse moving rack 4 for transmission. After the transverse moving motor 7 is started, it can drive the transverse connecting seat 5 to move horizontally.

[0021] The vertical track frame 8 is movably connected to the horizontal sliding connecting seat 5. The vertical track frame 8 can slide up and down along the horizontal sliding connecting seat 5. The vertical track frame 8 is a square tube that can move up and down relative to the horizontal sliding connecting seat 5. Specifically, the vertical track frame 8 is equipped with a vertical slide rail 9 and a vertical rack 10. A vertical slider 11 is installed on the first angle steel of the horizontal sliding connecting seat 5, and a vertical moving motor 12 is installed on the second angle steel of the horizontal sliding connecting seat 5. The vertical slider 11 is slidably engaged with the vertical slide rail 9. A gear 2 is installed on the shaft of the vertical moving motor 12, and the gear 2 is meshed with the vertical rack 10 for transmission. After the vertical moving motor 12 is started, it can drive the vertical track frame 8 to move vertically up and down. The top center of the upper oven 13 is fixedly connected to the lower end of the vertical track frame 8.

[0022] The lower drying oven 14 is connected to the lower drying oven moving mechanism, specifically: The lower oven moving mechanism includes a trough-shaped base 16, which is a U-shaped trough structure fixedly installed on the ground. The bottom of the trough-shaped base 16 has multiple vertically downward square holes drilled from front to back. The lifting mechanism housing 25 is fixedly installed in the square holes. A lower moving slide rail 17 is installed on the upper surface of each of the two side plates of the trough-shaped base 16. A lower moving rack 18 is also installed on the upper surface of one side plate of the trough-shaped base 16. The lower moving rack 18 is located outside the lower moving slide rail 17.

[0023] The lower moving frame 19 can slide back and forth on the grooved base 16. The upper part of the lower moving frame 19 is fixedly connected to the lower oven 14. Specifically, the lower moving frame 19 consists of a pair of L-shaped plates, which are welded to both sides of the lower oven 14. Two lower moving sliders 20 are installed on the bottom outer side of each lower moving frame 19, and the lower moving sliders 20 are slidably connected to the lower moving slide rail 17. A lower moving motor 21 is also fixedly installed on the outer side of one of the lower moving frames 19. The shaft of the lower moving motor 21 is equipped with a gear three, which meshes with the lower moving rack 18 for transmission.

[0024] After the lower moving motor 21 is started, it can drive the lower moving frame 19 and the lower drying box 14 to move to the section of the composite insulator 15 to be heated. After the horizontal moving motor 7 is started, it can drive the upper drying box 13 to move back and forth to above the section of the composite insulator 15 to be heated. Then the vertical moving motor 12 drives the upper drying box 13 to descend, and the upper drying box 13 and the lower drying box 14 close together, forming a surrounding heating of the core column of the composite insulator 15.

[0025] Long-length composite insulators 15 require multiple supports along their length; otherwise, they may be unstable if supported only at both ends, and the middle section of the composite insulator 15 may sag and bend due to its own weight. If a support structure is installed in the middle section of the composite insulator 15, it will obstruct the lower moving frame 19, preventing the lower drying oven 14 from moving via the moving support structure.

[0026] Therefore, in Embodiment 1 of the present invention, several lifting support mechanisms are provided. Each lifting support mechanism includes a lifting mechanism housing 25, which is a square metal shell located at the bottom of the slotted base 16. A lifting cylinder 23 and four limiting guide rods 24 are fixedly installed on the lifting mechanism housing 25. The cylinder body of the lifting cylinder 23 is located inside the lifting mechanism housing 25. The push rod of the lifting cylinder 23 and the four limiting guide rods 24 pass upward through the top cover of the lifting mechanism housing 25. The four limiting guide rods 24 are distributed around the push rod of the lifting cylinder 23. The lifting support plate 22 is a metal upright plate. The top surface of the lifting support plate 22 has a pair of grooves for placing the composite insulator 15. The bottom surface of the lifting support plate 22 is fixedly connected to the top end of the push rod of the lifting cylinder 23 and the top end of the limiting guide rods 24. The limiting guide rods 24 can slide vertically up and down to limit the push rod of the lifting cylinder 23, keeping the push rod of the lifting cylinder 23 vertically raised and lowered.

[0027] like Figure 7As shown, after the lifting plate 22 descends, it does not interfere with the lower oven 14 and the lower moving frame 19. During use, it is only necessary to control the lowering of the lifting plate 22 below the section to be heated, while simultaneously controlling the rising of the lifting plates 22 in other sections, to fully support the composite insulator 15, ensuring its stable placement and preventing bending deformation in the middle. The composite insulator 15 requires segmented heating and injection molding. The radius of the injection-molded skirt section is significantly different from that of the un-injected core rod section. Since the lifting plate 22 of this invention uses a cylinder for lifting, its height is controllable. Therefore, by simply making the lifting plate 22 supporting the core rod section slightly higher than the lifting plate 22 supporting the skirt section, the skirt section and core rod section of the composite insulator 15 can be evenly supported, keeping the composite insulator 15 horizontal.

[0028] Example 2:

[0029] Embodiment 2 of the present invention provides a method for segmented heating of long-length composite insulators, employing a segmented heating device for long-length composite insulators as described in Embodiment 1, and includes the following steps: In use, the composite insulator 15 is first placed in the groove position of the raised lifting plate 22 using hoisting or handling equipment. The upper oven moving mechanism and the lower oven moving mechanism drive the upper oven 13 and the lower oven 14 to move to the section to be heated, respectively. The upper oven 13 descends and closes with the lower oven 14. The electric heating device in the upper oven 13 and the lower oven 14 is started for continuous heating. After the current section is heated, the upper oven 13 and the lower oven 14 move forward to the next heating section. The above heating steps are repeated until the total length of the heating section matches the single injection length of the injection molding equipment.

[0030] If the moving path of the lower oven 14 or the heating position of the composite insulator 15 interferes with the lifting plate 22, the lifting plate 22 that may interfere will be lowered to a low position before the lower oven 14 moves. After the current section of the composite insulator 15 is heated, the lower oven 14 will continue to move forward, while the previously lowered lifting plate 22 will be lifted back to a high position by the lifting cylinder 23 to continue supporting the composite insulator 15.

[0031] After all sections matching the single injection length of the injection molding equipment have been heated, the upper oven 13 is raised, and the composite insulator 15 is transferred to the injection molding equipment using hoisting or transport equipment for skirt injection molding of the heated sections. After the skirt injection molding is completed, it is moved back to the segmented heating device, and the upper oven 13 and lower oven 14 move forward to the next heating section. The above heating steps are repeated to heat the next section of the composite insulator 15.

[0032] For example, if the injection molding equipment has a single injection length of 3 meters and the split-type oven has a single heating length of 1 meter, then the composite insulator 15 will be continuously heated in sections three times on the section heating device. After that, the composite insulator 15 will be moved into the injection molding equipment for one skirt injection. After the skirt is cured, it will be moved back to the section heating device for three more heatings. The above steps will be repeated until the entire composite insulator 15 is processed.

[0033] In the embodiments of the present invention, all technical features not described in detail are existing technologies or conventional technical means, and will not be repeated here.

[0034] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A segmented heating device for long-length composite insulators, comprising an upper oven (13) and a lower oven (14), characterized in that, The upper oven (13) is mounted on the upper oven moving mechanism, and the lower oven (14) is mounted on the lower oven moving mechanism. The lower oven moving mechanism includes a groove-shaped base (16), which has multiple vertical square holes drilled along its length. A lifting mechanism housing (25) is installed inside the square holes. The cylinder body of the lifting cylinder (23) is located inside the lifting mechanism housing (25). The push rod of the lifting cylinder (23) and several limiting guide rods (24) pass upward through the top cover of the lifting mechanism housing (25). The several limiting guide rods (24) lift the cylinder. The push rods of the cylinder (23) are centrally distributed. The bottom surface of the lifting plate (22) is connected to the top of the push rod of the lifting cylinder (23) and the top of the limiting guide rod (24). The top surface of the lifting plate (22) is provided with several grooves for placing the composite insulator (15). The lower oven moving mechanism can drive the lower oven (14) to move horizontally along the length direction of the slotted base (16). The upper oven moving mechanism can drive the upper oven (13) to move horizontally along the length direction of the slotted base (16). The upper oven moving mechanism can also drive the upper oven (13) to move up and down.

2. The segmented heating device for long-length composite insulators according to claim 1, characterized in that, The groove base (16) is a U-shaped groove structure that is fixedly installed on the ground. Lower sliding rails (17) are installed on both sides of the groove base (16), and a lower sliding rack (18) is installed on one side of the groove base (16).

3. The segmented heating device for long-length composite insulators according to claim 2, characterized in that, A pair of L-shaped plate structure lower moving frames (19) are fixedly installed on both sides of the lower oven (14). Multiple lower moving sliders (20) are installed on the bottom of the outer side of each lower moving frame (19). The lower moving sliders (20) are slidably connected to the lower moving slide rails (17). A lower moving motor (21) is installed on the outer side of one of the lower moving frames (19). A gear three is installed on the shaft of the lower moving motor (21). The gear three is meshed with the lower moving rack (18) for transmission.

4. The segmented heating device for long-length composite insulators according to claim 3, characterized in that, The outer shell (25) of the lifting mechanism is a square metal shell, and the lifting plate (22) is a metal upright plate.

5. A segmented heating device for long-length composite insulators according to claim 1, characterized in that, The upper oven moving mechanism includes a gantry frame (1), on which a transverse track frame (2) is mounted. The transverse track frame (2) is a square tube with both ends fixed at the middle position of the width direction above the gantry frame (1). The transverse track frame (2) is provided with two transverse slide rails (3) and a transverse rack (4). One transverse slide rail (3) is located on the upper surface of the transverse track frame (2), and the other transverse slide rail (3) is located on the side of the transverse track frame (2). The transverse rack (4) is located on the side of the transverse track frame (2).

6. A segmented heating device for long-length composite insulators according to claim 5, characterized in that, The transverse connecting seat (5) is slidably connected to the transverse track frame (2). The transverse connecting seat (5) is a metal seat welded from angle steel one and angle steel two. Angle steel one is located below angle steel two. The adjacent inner sides of the horizontal plate and vertical plate of angle steel one are provided with transverse sliding blocks (6) that are slidably connected to the transverse sliding rail (3). A transverse moving motor (7) is installed on the outer side of the vertical plate of angle steel one. The shaft of the transverse moving motor (7) is equipped with gear one. Gear one is meshed and connected to the transverse rack (4).

7. A segmented heating device for long-length composite insulators according to claim 6, characterized in that, The vertical track frame (8) is provided with a vertical slide rail (9) and a vertical rack (10). An angle steel one is provided with a vertical slider (11), and an angle steel two is provided with a vertical moving motor (12). The vertical slider (11) is slidably connected to the vertical slide rail (9). The shaft of the vertical moving motor (12) is equipped with a gear two, which meshes with the vertical rack (10) for transmission.

8. A segmented heating device for long-length composite insulators according to claim 1, characterized in that, Both the upper oven (13) and the lower oven (14) are equipped with electric heating devices, and the electric heating devices are provided with two semi-circular heating cavities.

9. A method for segmented heating of long-length composite insulators, characterized in that, The segmented heating device for long-length composite insulators as described in claim 1 includes the following steps: The composite insulator (15) is placed in the groove position of several raised lifting pallets (22). The upper oven moving mechanism and the lower oven moving mechanism drive the upper oven (13) and the lower oven (14) to move to the section to be heated, respectively. The upper oven (13) descends and closes with the lower oven (14). The upper oven (13) and the lower oven (14) are started to continuously heat. After the current section is heated, the upper oven (13) and the lower oven (14) move to the next heating section. The above heating steps are repeated until the total length of the heating section matches the single injection length of the injection molding equipment. After the composite insulator (15) is heated, it is transferred to the injection molding equipment to perform shed injection molding on the heated section. After the shed injection molding is completed, the composite insulator (15) is transferred back to the segmented heating device, and the other sections are segmented for heating and shed injection molding one by one until the entire composite insulator (15) is processed.

10. A method for segmented heating of a long-length composite insulator according to claim 9, characterized in that, If the movement path of the lower oven (14) or the current section heating position of the composite insulator (15) interferes with the lifting plate (22), the lifting plate (22) causing the interference will be lowered to a low position before the lower oven (14) moves. After the current section of the composite insulator (15) is heated, the lower oven (14) will continue to move, and the previously lowered lifting plate (22) will be lifted back to a high position by the lifting cylinder (23) to continue supporting the composite insulator (15).

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