Hollow insulator assembling method

文档序号:36816 发布日期:2021-09-24 浏览:40次 中文

阅读说明:本技术 一种空心绝缘子装配方法 (Hollow insulator assembling method ) 是由 张德进 刘铁桥 张斌 张达武 纪福俊 章玉秀 朱勇飞 王丹丹 秦锦华 卢从丽 沈 于 2021-07-13 设计创作,主要内容包括:本发明涉及一种空心绝缘子装配方法,首先,准备好装配所需的带有硅橡胶伞套的绝缘芯棒内筒、端头法兰、连接螺杆、连接螺母、行车;将绝缘芯棒内筒的两侧的圆周外表面上刷上环氧树脂胶;将端头法兰和上好胶的绝缘芯棒内筒放置在专用的装配模具上等待装配;通过行车的配合实现空心绝缘子的初装配;再通过行车的配合将初装配好的空心绝缘子放入专用的烘干设备中进行烘干,从而得到了所需的装配好的空心绝缘子。本发明的优点在于:通过专用的装配模具的配合来对空心绝缘子进行预装配,以对两个端头法兰进行锁紧固定,直至烘干结束,确保整个过程中的两个端头法兰的位置的精准,也就确保了两个端头法兰上的连接孔位置的一一对应,避免出现偏差。(The invention relates to a hollow insulator assembling method, firstly, preparing an insulating core rod inner cylinder with a silicon rubber umbrella sleeve, an end flange, a connecting screw rod, a connecting nut and a traveling crane which are required by assembly; brushing epoxy resin glue on the circumferential outer surfaces of two sides of the inner cylinder of the insulating core rod; placing the end flange and the insulated core rod inner cylinder coated with glue on a special assembly mold for waiting assembly; the initial assembly of the hollow insulator is realized through the matching of a travelling crane; and then the hollow insulator which is assembled in the beginning is put into special drying equipment for drying through the matching of a travelling crane, so that the required assembled hollow insulator is obtained. The invention has the advantages that: the hollow insulator is preassembled through the matching of the special assembly mold, so that the two end flanges are locked and fixed until the drying is finished, the accuracy of the positions of the two end flanges in the whole process is ensured, the one-to-one correspondence of the positions of the connecting holes in the two end flanges is also ensured, and the occurrence of deviation is avoided.)

1. A hollow insulator assembling method is characterized in that: comprises the following steps

Preparation of S1 material: firstly, preparing an insulating core rod inner cylinder with a silicon rubber umbrella sleeve, an end flange, a connecting screw rod, a connecting nut and a traveling crane which are required for assembly;

s2 inner cylinder gluing: brushing epoxy resin glue on the circumferential outer surfaces of two sides of the inner cylinder of the insulating core rod;

s3 preparation for assembly: placing the end flange and the glued insulating core rod inner cylinder on a special assembly mold to be assembled, wherein the special assembly mold comprises

The assembly base is horizontally arranged and is of a cuboid structure;

the fixing plates are used for placing the two end flanges, each fixing plate is a rectangular plate, a central through hole is formed in the center of each fixing plate, first fixing holes which correspond to the connecting holes of the end flanges one by one are formed in the periphery of the central through hole in the fixing plates, and second fixing holes are formed in the four corners of each fixing plate;

the two end flanges are respectively fixed with the two fixing plates, when the two end flanges are fixed, after connecting holes in the end flanges are in one-to-one correspondence with first fixing holes in the fixing plates, the end flanges and the fixing plates are fixed by bolts sequentially penetrating through the first fixing holes and the connecting holes and then locking by nuts, and after the two fixing plates are fixed, the two fixing plates are horizontally placed on the assembly base, and the end flanges are positioned on the upper sides of the two fixing plates to wait for assembly;

s4 initial assembly: the insulating core rod inner cylinder is horizontally lifted by a travelling crane, then one side of each fixing plate is manually lifted, so that the fixing plates are changed from a horizontal state to a vertical state, then two sides of the insulating core rod inner cylinder are respectively inserted on end flanges, the two fixing plates are respectively positioned on two outer sides of the hollow insulator, then four connecting screw rods are taken, and each connecting screw rod penetrates through a second fixing hole on one fixing plate and then penetrates through a second fixing hole on the other fixing plate, and finally the connecting screw rods are connected and fixed by using a connecting nut to complete locking, so that the initial assembly of the hollow insulator is completed;

s5, drying: putting the initially assembled hollow insulator into a special drying device in cooperation with a travelling crane, wherein the special drying device comprises

The drying box body is of a hollow cuboid structure with an opening at the upper end, a support bracket is arranged in the drying box body, the support bracket is of a rectangular frame type structure formed by a plurality of transverse rods and longitudinal rods, a gap is reserved between the support bracket and the inner wall of the bottom of the drying box body, and an electric heating pipe is also arranged in the gap between the bottom end of the support bracket and the drying box body;

the drying cover plate is matched with the drying box body and consists of a pair of cover plate main bodies which are arranged in a split mode, a semicircular opening is formed in the side end of each cover plate main body, the two semicircular openings are matched together to form a circular through hole for the silicon rubber umbrella cover to penetrate through after the two cover plate main bodies are combined, and waist-shaped openings for the connecting screw rods to penetrate through are formed in the two sides, located on the semicircular openings, of the side end of each cover plate main body;

in the drying process, the hollow insulator is lifted and is in a vertical state through the cooperation of a travelling crane, then the hollow insulator is vertically placed into a drying box body, the bottom end of the hollow insulator is supported on a supporting bracket, then two cover plate main bodies are inserted from two sides to seal the upper end of the drying box body, in the inserting process, the semicircular opening of the cover plate main body needs to be aligned to a silicon rubber umbrella sleeve, a waist-shaped opening is aligned to a connecting screw rod, after the sealing, a layer of rubber cushion is laid on the waist-shaped opening of the cover plate main body to seal the waist-shaped opening, then epoxy resin glue on an end flange on the lower side of the hollow insulator is dried and solidified, the drying temperature is between 113 ℃ and 125 ℃, the drying time is 3-5min, after the drying is finished, the cover plate main body is opened, the hollow insulator is rotated by 180 degrees through the cooperation of the travelling crane, drying and curing the epoxy resin adhesive on the end flange on the other side of the hollow insulator at the temperature of between 113 ℃ and 125 ℃ for 3-5 min;

s6 forming: after the epoxy resin glue on the end flanges on the two sides of the hollow insulator is dried, the hollow insulator is hung on the assembly base through a travelling crane, the connecting screw rods and the bolts are detached, and the two fixing plates are taken down from the end flanges, so that the required assembled hollow insulator is obtained.

2. The method of assembling a hollow insulator according to claim 1, wherein: in step S3, when the end flange and the fixing plate are fixed, a tapered pad is inserted into the connecting hole of the end flange in advance, and the tapered pad has a through hole for allowing a bolt to pass through.

3. The method of assembling a hollow insulator according to claim 1, wherein: in step S5, before the initially assembled hollow insulator is placed into a special drying device for drying, rubber seal caps are embedded into upper and lower sides of an inner cylinder of an insulating core rod of the hollow insulator, each seal cap includes a seal cap main body, the seal cap main body is of a hollow cylindrical structure, one side of the seal cap main body, which is far away from the inner cylinder of the insulating core rod, is opened, and a ring-shaped reinforcing rib plate is further connected to a middle position of an inner cavity of the seal cap main body, and is connected to an inner wall of the seal cap main body through a connecting rib plate.

4. The method of assembling a hollow insulator according to claim 1, wherein: in step S5, the drying cover plate and the drying box are matched with each other: the two sides of the drying box body are provided with a vertical upwards extending inserting section, the side surface of one side of the two mutually adjacent inserting sections is provided with a groove for inserting the cover plate main body, and the upper end surface of the cover plate main body is also connected with a handle.

Technical Field

The invention relates to the field of insulator assembly, in particular to a hollow insulator assembly method.

Background

The hollow composite insulator is composed of an insulating core rod inner cylinder, an end flange and a silicon rubber umbrella sleeve, wherein the silicon rubber umbrella sleeve is formed by connecting more than two silicon rubber umbrella sleeve sections, a connecting structure between two adjacent silicon rubber umbrella sleeve sections is a step type lap joint structure, namely, the tail part of the umbrella sleeve section processed at the previous time is a step type front section lap joint ring with the outer diameter smaller than that of the umbrella sleeve section, an adhesive is coated on the front section lap joint ring, the front section of the umbrella sleeve section processed at the next time is a rear section lap joint ring with the inner diameter matched with the lap joint ring, and the front section lap joint ring is bonded and connected with the rear section lap joint ring through the adhesive. The lapping structure increases the lapping bonding area, when the silicon rubber umbrella covers bear axial tension, the connection strength between the two umbrella covers is enhanced, and the phenomena of thinning and tearing are greatly reduced due to the shrinkage of the silicon rubber, so that the electrical performance of the hollow composite insulator is ensured, and the service life of the hollow composite insulator is prolonged.

In the production process of the hollow insulator, the silicone rubber umbrella cover is firstly molded on the circumferential outer wall of the inner cylinder of the insulating core rod in an injection molding mode, and then the two end flanges are respectively fixed with the inner cylinder of the insulating core rod. In the process of fixing the end flange and the insulating core rod inner cylinder, in order to enhance the connection stability between the end flange and the insulating core rod inner cylinder, epoxy resin is adopted for bonding and fixing between the end flange and the insulating core rod inner cylinder, in the process, the requirement of processing precision can be involved, the connecting holes on the two end flanges are required to be in one-to-one correspondence, in order to achieve the purpose, in the process of assembling, when an operator sleeves the end flange on the insulating core rod inner cylinder, the connecting holes on the two end flanges need to be aligned in advance, in the alignment process, the alignment process usually depends on a mode of visual observation of personnel, the alignment process needs to be adjusted for many times, and is very troublesome, and because the subsequent epoxy resin also needs to be dried and cured, namely, the insulator also needs to be moved, and the rotation phenomenon of the end flange can be easily caused in the process, affecting the alignment of the connection holes.

Disclosure of Invention

The invention aims to provide a hollow insulator assembling method which can ensure that connecting holes on two end flanges after assembling are in one-to-one correspondence.

In order to solve the technical problems, the technical scheme of the invention is as follows: the hollow insulator assembling method has the innovation points that: comprises the following steps

Preparation of S1 material: firstly, preparing an insulating core rod inner cylinder with a silicon rubber umbrella sleeve, an end flange, a connecting screw rod, a connecting nut and a traveling crane which are required for assembly;

s2 inner cylinder gluing: brushing epoxy resin glue on the circumferential outer surfaces of two sides of the inner cylinder of the insulating core rod;

s3 preparation for assembly: placing the end flange and the glued insulating core rod inner cylinder on a special assembly mold to be assembled, wherein the special assembly mold comprises

The assembly base is horizontally arranged and is of a cuboid structure;

the fixing plates are used for placing the two end flanges, each fixing plate is a rectangular plate, a central through hole is formed in the center of each fixing plate, first fixing holes which correspond to the connecting holes of the end flanges one by one are formed in the periphery of the central through hole in the fixing plates, and second fixing holes are formed in the four corners of each fixing plate;

the two end flanges are respectively fixed with the two fixing plates, when the two end flanges are fixed, after connecting holes in the end flanges are in one-to-one correspondence with first fixing holes in the fixing plates, the end flanges and the fixing plates are fixed by bolts sequentially penetrating through the first fixing holes and the connecting holes and then locking by nuts, and after the two fixing plates are fixed, the two fixing plates are horizontally placed on the assembly base, and the end flanges are positioned on the upper sides of the two fixing plates to wait for assembly;

s4 initial assembly: the insulating core rod inner cylinder is horizontally lifted by a travelling crane, then one side of each fixing plate is manually lifted, so that the fixing plates are changed from a horizontal state to a vertical state, then two sides of the insulating core rod inner cylinder are respectively inserted on end flanges, the two fixing plates are respectively positioned on two outer sides of the hollow insulator, then four connecting screw rods are taken, and each connecting screw rod penetrates through a second fixing hole on one fixing plate and then penetrates through a second fixing hole on the other fixing plate, and finally the connecting screw rods are connected and fixed by using a connecting nut to complete locking, so that the initial assembly of the hollow insulator is completed;

s5, drying: putting the initially assembled hollow insulator into a special drying device in cooperation with a travelling crane, wherein the special drying device comprises

The drying box body is of a hollow cuboid structure with an opening at the upper end, a support bracket is arranged in the drying box body, the support bracket is of a rectangular frame type structure formed by a plurality of transverse rods and longitudinal rods, a gap is reserved between the support bracket and the inner wall of the bottom of the drying box body, and an electric heating pipe is also arranged in the gap between the bottom end of the support bracket and the drying box body;

the drying cover plate is matched with the drying box body and consists of a pair of cover plate main bodies which are arranged in a split mode, a semicircular opening is formed in the side end of each cover plate main body, the two semicircular openings are matched together to form a circular through hole for the silicon rubber umbrella cover to penetrate through after the two cover plate main bodies are combined, and waist-shaped openings for the connecting screw rods to penetrate through are formed in the two sides, located on the semicircular openings, of the side end of each cover plate main body;

in the drying process, the hollow insulator is lifted and is in a vertical state through the cooperation of a travelling crane, then the hollow insulator is vertically placed into a drying box body, the bottom end of the hollow insulator is supported on a supporting bracket, then two cover plate main bodies are inserted from two sides to seal the upper end of the drying box body, in the inserting process, the semicircular opening of the cover plate main body needs to be aligned to a silicon rubber umbrella sleeve, a waist-shaped opening is aligned to a connecting screw rod, after the sealing, a layer of rubber cushion is laid on the waist-shaped opening of the cover plate main body to seal the waist-shaped opening, then epoxy resin glue on an end flange on the lower side of the hollow insulator is dried and solidified, the drying temperature is between 113 ℃ and 125 ℃, the drying time is 3-5min, after the drying is finished, the cover plate main body is opened, the hollow insulator is rotated by 180 degrees through the cooperation of the travelling crane, drying and curing the epoxy resin adhesive on the end flange on the other side of the hollow insulator at the temperature of between 113 ℃ and 125 ℃ for 3-5 min;

s6 forming: after the epoxy resin glue on the end flanges on the two sides of the hollow insulator is dried, the hollow insulator is hung on the assembly base through a travelling crane, the connecting screw rods and the bolts are detached, and the two fixing plates are taken down from the end flanges, so that the required assembled hollow insulator is obtained.

Further, in step S3, when the end flange and the fixing plate are fixed, a tapered pad is inserted into the connecting hole of the end flange in advance, and the tapered pad has a through hole for allowing a bolt to pass through.

Further, in step S5, before the hollow insulator is placed into a special drying device for drying, rubber sealing caps are embedded into upper and lower sides of the inner insulating core rod cylinder of the hollow insulator, each sealing cap includes a sealing cap main body, the sealing cap main body is of a hollow cylinder structure, one side of the sealing cap main body, which is far away from the inner insulating core rod cylinder, is opened, and an annular reinforcing rib plate is further connected to a middle position of an inner cavity of the sealing cap main body, and is connected to an inner wall of the sealing cap main body through a connecting rib plate.

Further, in step S5, the cooperation between the drying cover plate and the drying box body is: the two sides of the drying box body are provided with a vertical upwards extending inserting section, the side surface of one side of the two mutually adjacent inserting sections is provided with a groove for inserting the cover plate main body, and the upper end surface of the cover plate main body is also connected with a handle.

The invention has the advantages that: according to the assembling method, the hollow insulator is preassembled through the matching of the special assembling die, so that the two end flanges are locked and fixed until the drying is finished, the accuracy of the positions of the two end flanges in the whole process is ensured, the one-to-one correspondence of the positions of the connecting holes on the two end flanges is also ensured, and the deviation is avoided.

In addition, through the cooperation of the special drying equipment, only the position at the end flange is dried, the required drying area is reduced, the corresponding drying efficiency is also improved, namely, the required drying time is greatly shortened, and the drying efficiency is effectively improved.

To the toper pad of filling in the connecting hole of end flange, then compensate the clearance between bolt and the first connecting hole through the cooperation of toper pad, ensure the accurate of hookup location between fixed plate and the end flange.

The design of the rubber sealing cover is to realize the plugging of the two sides of the inner cylinder of the insulating core rod, avoid the heat from being radiated outwards from the through hole in the middle of the inner cylinder of the insulating core rod, reduce the heat loss, ensure the heating temperature in the main body of the oven and ensure the drying and curing effect.

Drawings

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic view of an assembly base according to the present invention.

Fig. 2 is a schematic view of a fixing plate according to the present invention.

Fig. 3 is a schematic view of the drying cabinet of the present invention.

Fig. 4 is a schematic view of the drying cover plate of the present invention.

Fig. 5 is a schematic view of the closure of the present invention.

Fig. 6 is a schematic view showing the initial assembly state of the hollow insulator according to the present invention.

Detailed Description

The following examples are presented to enable one of ordinary skill in the art to more fully understand the present invention and are not intended to limit the scope of the embodiments described herein.

The hollow insulator assembling method is realized by the following steps:

preparation of S1 material: firstly, an insulating core rod inner cylinder 7 with a silicon rubber umbrella cover 73, an end flange 71, a connecting screw 72, a connecting nut and a traveling crane which are required by assembly are prepared.

S2 inner cylinder gluing: and brushing epoxy resin glue on the circumferential outer surfaces of the two sides of the inner cylinder of the insulating core rod.

S3 preparation for assembly: placing the end flange and the glued insulating core rod inner cylinder on a special assembly mold to be assembled, as can be seen from the schematic diagrams shown in fig. 1 and 2, the special assembly mold comprises

A horizontally arranged assembly base 1, wherein the assembly base 1 is a cuboid plate.

A pair of fixed plate 2 that is used for placing two end flanges, fixed plate 2 is a cuboid board, it has a central through-hole 21 to open at fixed plate 2 center, it has the first fixed orifices 22 with each connecting hole one-to-one of end flange to open around central through-hole 21 on fixed plate 2, it has second fixed orifices 23 still to open at four edges and corners of fixed plate 2, central through-hole 21, first fixed orifices 22, second fixed orifices 23 are the circular port, and central through-hole 21, second fixed orifices 23, the diameter of first fixed orifices 22 reduces in proper order.

With two end flanges respectively with two fixed plates 2 fixed mutually, when fixing, after the connecting hole on the end flange and the first fixed orifices 22 looks one-to-one on the fixed plate 2, pass first fixed orifices 22 through the bolt in proper order, utilize the nut locking behind the connecting hole on the end flange, thereby realize the fixing between end flange and the fixed plate 2, and after fixing, place two fixed plates 2 levels on assembly base 1, and the end flange is located the upside, wait for the assembly.

When the end flange is fixed to the fixing plate 2, a tapered pad is inserted in advance into the connecting hole of the end flange 71, and the tapered pad has a through hole for allowing a bolt to pass through. To the toper pad of filling in the connecting hole of end flange, then because at the in-process of selection bolt, the bolt has external screw thread structure, in order to guarantee to avoid the damage to the bolt, consequently, the bore of bolt can slightly be less than the size of the connecting hole of end flange 71, when connecting promptly, the bolt can leave certain clearance with the connecting hole of end flange 71 between, consequently, compensate the clearance between compensateing bolt and the first connecting hole through the toper pad, ensure the accurate of hookup location between fixed plate 2 and the end flange 71.

S4 initial assembly: the insulating core rod inner cylinder 7 is horizontally lifted by a travelling crane, then one side of each fixing plate 2 is manually lifted, so that the fixing plates 2 are changed into a vertical state from a horizontal state, then two sides of the insulating core rod inner cylinder 7 are respectively inserted into the end flange 71, the two fixing plates 2 are respectively positioned at two outer sides of the hollow insulator, then four connecting screw rods 72 are taken, and each connecting screw rod 72 firstly penetrates through the second fixing hole 23 on one fixing plate 2 and then penetrates through the second fixing hole 23 on the other fixing plate 2, and finally the connecting screw rods are connected and fixed by using a connecting nut to complete locking, so that the initial assembly of the hollow insulator is completed, and the state shown in figure 6 is formed.

S5, drying: the hollow insulator which is assembled in the beginning is put into a special drying device by the cooperation of a travelling crane, as can be seen from the schematic diagrams shown in fig. 3 and 4, the special drying device comprises

A drying box 3, this drying box 3 is a hollow cuboid structure with an open upper end, a support bracket 31 is installed in the drying box 3, this support bracket 31 is a rectangular frame structure composed of a plurality of horizontal rods and vertical rods, a gap is left between the support bracket 31 and the inner wall of the bottom of the drying box 3, and an electric heating pipe 32 is also installed in the gap between the bottom of the support bracket 31 and the drying box 3.

And the drying cover plate is matched with the drying box body 3, the drying cover plate is formed by a pair of cover plate main bodies 4 which are arranged in a split mode, a semicircular opening 41 is formed in the side end of each cover plate main body 4, after the two cover plate main bodies 41 are combined, the two semicircular openings 41 are matched together to form a circular through hole for the silicon rubber umbrella cover 73 to penetrate through, and waist-shaped openings 42 for the connecting screw rods 72 to penetrate through are formed in the two sides, located on the semicircular openings 41, of the side end of each cover plate main body 4.

The cooperation between stoving apron and the stoving box 3 does: the two sides of the drying box body 3 are provided with a vertical upwards extending inserting section 33, the side surface of one side of the two mutually adjacent inserting sections 33 is provided with a groove 34 for inserting the cover plate main body 4, and the upper end surface of the cover plate main body 4 is also connected with a handle.

In the drying process, the hollow insulator is lifted and is in a vertical state through the cooperation of a traveling crane, then the hollow insulator is vertically placed into the drying box body 3, the bottom end of the hollow insulator is supported on the supporting bracket 31, then the two cover plate main bodies 4 are inserted into the grooves 34 from two sides, the upper end of the drying box body 3 is sealed, in the inserting process, the semicircular opening 31 of the cover plate main body 4 needs to be aligned to the silicon rubber umbrella sleeve 73, the waist-shaped opening 42 is aligned to the connecting screw rod 72, after the sealing, a layer of rubber gasket is laid on the waist-shaped opening 42 of the cover plate main body 4 to seal the waist-shaped opening 42, then the epoxy resin adhesive on the end flange at the lower side of the hollow insulator is dried and cured, the drying temperature is between 113 ℃ and 125 ℃, the drying time is 3-5min, and after the drying is finished, the cover plate main body 4 is opened, and rotating the hollow insulator by 180 degrees by matching with a travelling crane, and drying and curing the epoxy resin adhesive on the end flange at the other side of the hollow insulator at the temperature of 113-125 ℃ for 3-5 min.

Before the initially assembled hollow insulator is placed into a special drying device for drying, rubber seal caps are embedded into the upper side and the lower side of an insulating core rod inner cylinder 7 of the hollow insulator, as shown in a schematic diagram of fig. 5, each seal cap comprises a seal cap main body 5, the seal cap main body 5 is of a hollow cylinder structure, one side, away from the insulating core rod inner cylinder 7, of each seal cap main body 5 is open, the size of the circumferential outer wall of each seal cap main body 5 is identical to that of the inner wall of the insulating core rod inner cylinder 7 or slightly larger than that of the inner wall of the insulating core rod inner cylinder 7, an annular reinforcing rib plate 51 is further connected to the middle of the inner cavity of each seal cap main body 5, and each reinforcing rib plate 51 is connected with the inner wall of each seal cap main body 5 through a connecting rib plate 52. The design of rubber closing cap, then be in order to realize the shutoff to insulating plug inner tube 7 both sides, because insulating plug inner tube 7 is a hollow pipe, and when drying the solidification, and not all dry whole hollow insulator, only carry out local drying to end flange department, will lead to partial steam can outwards spill from insulating plug inner tube 7's central through-hole department like this, lead to thermal loss, it is corresponding, the inside temperature of oven main part 3 also can receive certain influence, consequently, come to carry out the shutoff to insulating plug inner tube's both sides through the rubber closing cap, avoid the heat outwards spill from insulating plug inner tube 7 middle through-hole department, reduce calorific loss, guarantee the heating temperature in the oven main part 3, guarantee the stoving solidification effect.

S6 forming: after the epoxy resin glue on the end flanges 71 on the two sides of the hollow insulator is dried, the hollow insulator is hung on the assembly base 1 through a travelling crane, the connecting screw rods 72 and the bolts are removed, and the two fixing plates 2 are taken down from the end flanges 71, so that the required assembled hollow insulator is obtained.

According to the assembling method, the hollow insulator is preassembled through the matching of the special assembling die, so that the two end flanges are locked and fixed until the drying is finished, the accuracy of the positions of the two end flanges in the whole process is ensured, the one-to-one correspondence of the positions of the connecting holes on the two end flanges is also ensured, and the deviation is avoided.

In addition, through the cooperation of the special drying equipment, only the position at the end flange is dried, the required drying area is reduced, the corresponding drying efficiency is also improved, namely, the required drying time is greatly shortened, and the drying efficiency is effectively improved.

It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

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