阅读说明：本技术 一种铜管缺陷智能修复装置 (Intelligent copper pipe defect repairing device ) 是由 谢紫翔 吴小波 谭美红 樊元福 罗奇梁 肖文云 曾维强 冯锦剑 罗强 官正辉 王 于 2021-09-27 设计创作，主要内容包括：本发明提供一种铜管缺陷智能修复装置,属于铜管缺陷修复技术领域,包括工作台、圆铜管、打磨装置、打磨环和安装架构成,工作台的上表面固定连接有安装架,打磨装置位于工作台靠近安装架的一侧设置,工作台的一侧转动连接有打磨环,圆铜管位于工作台靠近打磨环的一侧卡设连接。本发明解决了目前现有大多铜管表面可能会出现凹槽等,需要借助其他工具将铜管表面修复,但现有铜管通常人工使用打磨砂纸进行打磨修复,增加使用者的工作量,耗费使用者大量的精力,同时需要招募大量员工进行操作,增加使用者的经济负担,人工打磨可能会造成,铜管不平滑,增加铜管的消耗,不利于设备正常使用,影响使用者的工作完成的问题。(The invention provides an intelligent copper pipe defect repairing device, which belongs to the technical field of copper pipe defect repairing and comprises a workbench, a round copper pipe, a polishing device, a polishing ring and a mounting frame, wherein the mounting frame is fixedly connected to the upper surface of the workbench, the polishing device is arranged on one side, close to the mounting frame, of the workbench, the polishing ring is rotatably connected to one side of the workbench, and the round copper pipe is clamped and connected to one side, close to the polishing ring, of the workbench. The invention solves the problems that grooves and the like may appear on the surface of most of the existing copper pipes at present, the surface of the copper pipe needs to be repaired by other tools, but the existing copper pipes are usually polished and repaired manually by polishing sand paper, so that the workload of a user is increased, a great deal of energy of the user is consumed, a great amount of staff needs to be recruited for operation, the economic burden of the user is increased, the manual polishing may cause unsmooth copper pipes, the consumption of the copper pipes is increased, the normal use of equipment is not facilitated, and the work completion of the user is influenced.)

1. The utility model provides a copper pipe defect intelligence prosthetic devices which characterized in that: the polishing device comprises a workbench (1), a round copper pipe (2), a polishing device, a polishing ring (4) and a mounting frame (10), wherein the upper surface of the workbench (1) is fixedly connected with the mounting frame (10), the polishing device is arranged on one side, close to the mounting frame (10), of the workbench (1), the polishing ring (4) is connected to one side of the workbench (1) in a rotating mode, the round copper pipe (2) is arranged on one side, close to the polishing ring (4), of the workbench (1) in a clamping mode, the polishing device comprises a clamping ring (3), a gear (5), a motor (7), a fixing rod (9) and a control console (6), the surface of the polishing ring (4) is fixedly connected with the clamping ring (3), one side, close to the polishing ring (4), of the mounting frame (10) is connected with the fixing rod (9) in a sliding mode, and one side, close to the clamping ring (3), of the fixing rod (9) is connected with the gear (5) in a rotating mode.

2. The intelligent repairing device for the defects of the copper pipes according to claim 1, which is characterized in that: one side fixedly connected with motor (7) that snap ring (3) were kept away from in gear (5), gear (5) are connected with snap ring (3) meshing, one side fixedly connected with control cabinet (6) that mounting bracket (10) are close to dead lever (9).

3. The intelligent repairing device for the defects of the copper pipes as claimed in claim 2, wherein: the console (6) is arranged in a U shape, the fixed rod (9) is connected with the console (6) in a sliding mode, and the side, close to the fixed rod (9), of the console (6) is connected with the sliding block (8) in a sliding mode.

4. A copper pipe defect intelligent repair device according to claim 3, characterized in that: slider (8) and dead lever (9) sliding connection, one side sliding connection that mounting bracket (10) are close to dead lever (9) has gag lever post (11), gag lever post (11) are "L" shape and set up.

5. The intelligent repairing device for the defects of the copper pipes as claimed in claim 4, wherein: one side of the fixed rod (9) close to the limiting rod (11) is provided with a groove, the limiting rod (11) is connected with the fixed rod (9) in a sliding mode, one side of the mounting rack (10) close to the limiting rod (11) is fixedly connected with a protection spring, and the limiting rod (11) and the protection spring are fixedly connected with one side of the mounting rack (10) away from the protection spring.

6. A copper pipe defect intelligent repair device according to claim 5, characterized in that: workstation (1) one side that is close to round copper pipe (2) be provided with fixing device, fixing device includes locating rack (12), drive belt (14) and spacing (13), one side rotation that workstation (1) is close to round copper pipe (2) is connected with drive belt (14), round copper pipe (2) and drive belt (14) sliding connection, workstation (1) one side fixedly connected with locating rack (12) that is close to round copper pipe (2), the last surface sliding connection of locating rack (12) has spacing (13), spacing (13) have two, two spacing (13) are mirror symmetry and set up.

7. The intelligent repairing device for the defects of the copper pipes as recited in claim 6, wherein: the limiting frame (13) is connected with the round copper pipe (2) in a sliding mode, and one side of the limiting frame (13) is fixedly connected with a pull rod (19).

8. A copper pipe defect intelligent repair device according to claim 7, characterized in that: one side sliding connection that locating rack (12) are close to pull rod (19) have inserted block (15), inserted block (15) and pull rod (19) sliding connection, inserted block (15) have two, two inserted blocks (15) are mirror symmetry and set up.

9. The intelligent repairing device for the defects of the copper pipes as recited in claim 8, wherein: one side of each insertion block (15) far away from the pull rod (19) is fixedly connected with a fixed spring (16), each fixed spring (16) is fixedly connected with the two insertion blocks (15), and one side of each positioning frame (12) close to the corresponding insertion block (15) is slidably connected with a stop block (17).

10. The intelligent repairing device for the defects of the copper pipes as recited in claim 9, wherein: the inserting block is characterized in that one side, close to the blocking block (17), of the inserting block (15) is provided with a slot, the blocking block (17) is connected with the inserting block (15) in a sliding mode, one side, close to the inserting block (15), of the pull rod (19) is connected with a stop block (18) in a sliding mode, one side, close to the stop block (18), of the inserting block (15) is provided with a sliding groove, and the stop block (18) is connected with the inserting block (15) in a sliding mode.

Technical Field

The invention belongs to the technical field of copper pipe defect repair, and particularly relates to an intelligent copper pipe defect repair device.

Background

The copper tube is also called copper tube. One type of non-ferrous metal pipe is a pressed and drawn seamless pipe. The copper pipe has the characteristics of good electrical conductivity and thermal conductivity, and the main materials of the conductive fittings and the heat dissipation fittings of electronic products are the first choice for modern contractors to install tap water pipelines, heat supply pipelines and refrigeration pipelines in all residential commodity rooms. The copper pipe is strong in corrosion resistance, not easy to oxidize, not easy to chemically react with some liquid substances, easy to be subjected to bright bending modeling, light in weight, good in heat conductivity and high in low-temperature strength. Are commonly used in the manufacture of heat exchange devices such as condensers and the like. And is also used for assembling a low-temperature pipeline in the oxygen production equipment. Copper tubing of small diameter is commonly used to convey pressurized fluids such as lubrication systems, oil hydraulic systems, and the like.

At present, recess etc. can appear in most present copper pipe surfaces, need be with copper pipe surface repair with the help of other instruments, but present copper pipe is usually artifical to use the abrasive paper of polishing to polish and is restoreed, increase user's work load, consume a large amount of efforts of user, need recruit a large amount of staff simultaneously and operate, increase user's economic burden, artifical polishing can cause, the copper pipe is not smooth, increase the consumption of copper pipe, be unfavorable for equipment normal use, the problem of user's work completion is influenced.

Disclosure of Invention

The invention aims to solve the defect that a groove of a copper pipe is not easy to repair in the prior art, and provides an intelligent repairing device for defects of the copper pipe.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a copper pipe defect intelligence prosthetic devices, includes workstation, round copper pipe, grinding device, ring and mounting bracket and constitutes, and the last fixed surface of workstation is connected with the mounting bracket, and grinding device is located the workstation and sets up near one side of mounting bracket, and one side of workstation is rotated and is connected with the ring of polishing, and round copper pipe is located one side card that the workstation is close to the ring of polishing and establishes the connection, grinding device include snap ring, gear, motor, dead lever and control cabinet, the fixed surface of ring of polishing is connected with the snap ring, and one side sliding connection that the mounting bracket is close to the ring of polishing has the dead lever, and one side that the dead lever is close to the snap ring is rotated and is connected with the gear.

Preferably, the gear keep away from one side fixedly connected with motor of snap ring, the gear is connected with the snap ring meshing, one side fixedly connected with control cabinet that the mounting bracket is close to the dead lever, the control cabinet is "U" shape setting, dead lever and control cabinet sliding connection, one side sliding connection that the control cabinet is close to the dead lever has the slider.

Preferably, the sliding block is connected with the fixed rod in a sliding mode, one side, close to the fixed rod, of the mounting frame is connected with the limiting rod in a sliding mode, and the limiting rod is arranged in an L shape.

Preferably, one side of the fixed rod, which is close to the limiting rod, is provided with a groove, the limiting rod is in sliding connection with the fixed rod, one side of the mounting frame, which is close to the limiting rod, is fixedly connected with a protection spring, and the limiting rod is fixedly connected with one side of the protection spring, which is far away from the mounting frame.

Preferably, one side of the workbench, which is close to the round copper pipe, is provided with a fixing device, the fixing device comprises a positioning frame, a transmission belt and a limiting frame, one side of the workbench, which is close to the round copper pipe, is rotatably connected with the transmission belt, and the round copper pipe is in sliding connection with the transmission belt.

Preferably, the workstation be close to one side fixedly connected with locating rack of round copper pipe, the upper surface sliding connection of locating rack has spacing, spacing has two, two spacing are mirror symmetry and set up, spacing and round copper pipe sliding connection, one side fixedly connected with pull rod of spacing.

Preferably, one side of the positioning frame close to the pull rod is connected with two insertion blocks in a sliding mode, the two insertion blocks are connected with the pull rod in a sliding mode, and the two insertion blocks are arranged in a mirror symmetry mode.

Preferably, one side of the insertion block, which is far away from the pull rod, is fixedly connected with a fixing spring, the fixing spring is respectively fixedly connected with the two insertion blocks, and one side of the positioning frame, which is close to the insertion blocks, is slidably connected with a stop block.

Preferably, one side of the insertion block, which is close to the blocking block, is provided with a slot, the blocking block is in sliding connection with the insertion block, one side of the pull rod, which is close to the insertion block, is in sliding connection with a stop block, one side of the insertion block, which is close to the stop block, is provided with a sliding groove, and the stop block is in sliding connection with the insertion block.

Compared with the prior art, the invention has the advantages and positive effects that,

1. in the invention, by arranging the polishing ring, when in use, the limiting rod is slid, the limiting rod is separated from the fixed rod immediately, the fixed rod is slid towards the direction of the clamping ring, when the fixed rod is abutted against a control console, the gear is meshed with the clamping ring, the sliding block is slid immediately to prevent the fixed rod from sliding, the motor is turned on immediately, the gear drives the clamping ring immediately, the clamping ring drives the polishing ring to rotate along the surface of the round copper pipe, the groove on the surface of the round copper pipe is repaired and polished smoothly, after the polishing ring is used up, the motor is turned off immediately, the sliding block is slid, the fixed rod is pulled upwards immediately, the fixed rod drives the gear to be separated from the clamping ring, the limiting rod is pulled, when the fixed rod reaches a preset position, the limiting rod is loosened immediately, the spring loses constraint to generate elasticity to pull the limiting rod to insert into the fixed rod, the fixed rod is convenient for next use, and the problem that grooves and the like possibly appear on the surface of most of the existing copper pipe at present is solved, need be with the help of other instruments with copper pipe surface repair, but present copper pipe is usually artifical to be used and is polished abrasive paper and polish the restoration, increases user's work load, consumes a large amount of efforts of user, need recruit a large amount of staff simultaneously and operate, increases user's economic burden, and artifical polishing may cause, and copper pipe is not smooth, increases the consumption of copper pipe, is unfavorable for equipment normal use, influences the problem that user's work was accomplished.

2. In the invention, by arranging the limiting frame, when in use, a round copper pipe is placed on the positioning frame, the limiting frame is immediately slid to clamp the round copper pipe, the pull rod slides along the limiting frame to pull the stop block, the fixing spring loses constraint to generate elasticity immediately, the insertion block is immediately pushed to be inserted into the pull rod, the stop block slides towards the direction of the insertion block, the stop block is inserted into the insertion block to immediately fix the limiting frame, the round copper pipe is constrained at the moment, the transmission belt is opened, the transmission belt immediately pushes the round copper pipe to slide towards the direction of the polishing ring to polish, the sliding stop block is separated from the insertion block, the insertion block is immediately pressed to reset, the stop block is pressed towards the direction of the insertion block, the stop block is inserted into the insertion block, the limiting frame is immediately slid to open, the problem that when most of the existing copper pipes are repaired, a user needs to manually put the copper pipe into a polishing machine to polish, the operation difficulty of the user is increased, and the manual operation can cause connection error between the copper pipe and the polishing machine, the copper pipe after polishing is not uniform, the appearance of the copper pipe is affected, the copper pipe is not beneficial to use, and the economic consumption of a user is increased.

Drawings

FIG. 1 is a schematic perspective view of an intelligent copper pipe defect repairing apparatus according to the present invention;

FIG. 2 is a schematic side view of the intelligent copper pipe defect repairing apparatus shown in FIG. 1;

FIG. 3 is a schematic structural diagram of a polishing ring in the intelligent copper pipe defect repairing apparatus shown in FIG. 1;

FIG. 4 is a schematic structural diagram of a position A in the intelligent copper pipe defect repairing apparatus shown in FIG. 3;

fig. 5 is a schematic structural view of a limiting frame in the intelligent copper pipe defect repairing apparatus shown in fig. 1.

Illustration of the drawings: 1. a work table; 2. a round copper pipe; 3. a snap ring; 4. grinding a ring; 5. a gear; 6. a console; 7. a motor; 8. a slider; 9. fixing the rod; 10. a mounting frame; 11. a limiting rod; 12. a positioning frame; 13. a limiting frame; 14. a transmission belt; 15. inserting a block; 16. fixing the spring; 17. blocking; 18. a stopper; 19. a pull rod.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be further described with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and thus the present invention is not limited to the specific embodiments of the present disclosure.

Embodiment 1, as shown in fig. 1-5, a copper pipe defect intelligent repair device, including workstation 1, round copper pipe 2, grinding device, polishing ring 4 and mounting bracket 10 constitution, the last fixed surface of workstation 1 is connected with mounting bracket 10, and grinding device is located one side setting that workstation 1 is close to mounting bracket 10, and one side of workstation 1 is rotated and is connected with polishing ring 4, and round copper pipe 2 is located one side card of workstation 1 that is close to polishing ring 4 and establishes the connection.

As shown in fig. 1 and 3, grinding device includes snap ring 3, gear 5, motor 7, dead lever 9 and control cabinet 6, the fixed surface of ring 4 that polishes is connected with snap ring 3, one side sliding connection that mounting bracket 10 is close to ring 4 that polishes has dead lever 9, one side that dead lever 9 is close to snap ring 3 is rotated and is connected with gear 5, it may appear recess etc. to have solved present most copper pipe surfaces now, need polish copper pipe surface restoration with the help of other instruments, but present copper pipe is usually artifical to use sand paper of polishing to polish and restores, increase user's work load, consume a large amount of efforts of users, need recruit a large amount of staff to operate simultaneously, increase user's economic burden, artifical polishing may cause, the copper pipe is not smooth, increase the consumption of copper pipe, be unfavorable for equipment normal use, the problem of user's work completion is influenced.

A motor 7 is fixedly connected to one side of the gear 5 far away from the snap ring 3, the gear 5 is meshed with the snap ring 3, a console 6 is fixedly connected to one side of the mounting frame 10 near a fixed rod 9, the console 6 is arranged in a U shape, the fixed rod 9 is slidably connected with the console 6, a slider 8 is slidably connected to one side of the console 6 near the fixed rod 9, the problem that grooves and the like possibly appear on the surface of most existing copper pipes at present is solved, the surface of the copper pipe needs to be repaired by other tools, however, the existing copper pipe is usually repaired by manual work using polishing sand paper, which increases the workload of users, consumes a great deal of energy of users, a large amount of staff need be recruited to operate simultaneously, increase user's economic burden, the manual work is polished and may be caused, and the copper pipe is unsmooth, increases the consumption of copper pipe, is unfavorable for equipment normal use, influences the problem that user's work was accomplished.

Slider 8 and dead lever 9 sliding connection, one side sliding connection that mounting bracket 10 is close to dead lever 9 has gag lever post 11, gag lever post 11 is "L" shape setting, it can appear recess etc. to have solved present most copper pipe surfaces, need be with the help of other instruments with copper pipe surface repair, but present copper pipe is artifical generally and is used abrasive paper of polishing and polish the restoration, increase user's work load, consume a large amount of efforts of user, a large amount of staff need recruit simultaneously and operate, increase user's economic burden, artifical polishing can lead to the fact, the copper pipe is unsmooth, increase the consumption of copper pipe, be unfavorable for equipment normal use, influence the problem of user's work completion.

Dead lever 9 is close to one side of gag lever post 11 and has been seted up flutedly, gag lever post 11 and dead lever 9 sliding connection, one side fixedly connected with protection spring that mounting bracket 10 is close to gag lever post 11, one side fixed connection of mounting bracket 10 is kept away from with protection spring to gag lever post 11, it may appear recesses etc. to have solved present most copper pipe surface, need be with the help of other instruments with copper pipe resurfacing, but present copper pipe is usually artifical to use abrasive paper of polishing to polish and is restoreed, increase user's work load, consume a large amount of energy of user, a large amount of staff of need recruiting simultaneously operate, increase user's economic burden, artifical polishing may cause, the copper pipe is unsmooth, increase the consumption of copper pipe, be unfavorable for equipment normal use, influence the problem of user's work completion.

The upper section components are matched to achieve the effect that when the polishing ring 4 is arranged, when the polishing device is used, the limiting rod 11 is slid, the limiting rod 11 is separated from the fixing rod 9, the fixing rod 9 is slid towards the direction of the clamping ring 3, when the fixing rod 9 is abutted against the control console 6, the gear 5 is meshed with the clamping ring 3, the sliding block 8 is slid immediately, the fixing rod 9 is prevented from sliding, the motor 7 is opened immediately, the motor 7 rotates to drive the gear 5, the gear 5 pushes the clamping ring 3 immediately, the clamping ring 3 drives the polishing ring 4 to rotate along the surface of the circular copper pipe 2, the groove on the surface of the circular copper pipe 2 is repaired, polished smoothly, after the polishing device is used up, the motor 7 is closed immediately, the sliding block 8 slides immediately, the fixing rod 9 is pulled upwards, the fixing rod 9 drives the clamping ring 5 to be separated from the clamping ring 3, the limiting rod 11 is pulled, when the fixing rod 9 reaches a preset position, the limiting rod 11 is loosened immediately, the spring constraint generates elastic force to pull the limiting rod 11 to be inserted into the fixing rod 9, fixed dead lever 9 makes things convenient for next use, it can appear recess etc. to have solved present most copper pipe surface, need be with the help of other instruments with copper pipe surface repair, but present copper pipe is artifical use abrasive paper of polishing usually and is polished and repair, increase user's work load, consume a large amount of efforts of user, a large amount of staff need be recruited simultaneously and operate, increase user's economic burden, artifical polishing can cause, the copper pipe is not smooth, increase the consumption of copper pipe, be unfavorable for equipment normal use, the problem of user's work completion is influenced.

As shown in fig. 1 and 5, one side that workstation 1 is close to round copper pipe 2 is provided with fixing device, fixing device includes locating rack 12, drive belt 14 and spacing 13, one side that workstation 1 is close to round copper pipe 2 rotates and is connected with drive belt 14, round copper pipe 2 and 14 sliding connection of drive belt, when having solved present most copper pipe and restoreing, need the manual copper pipe of user to put into the polisher with the copper pipe and polish, increase user's the operation degree of difficulty, the manual work is operated simultaneously and may be leaded to being connected between copper pipe and the sander and make mistakes, lead to the copper pipe after polishing asymmetric, influence the outward appearance of copper pipe, be unfavorable for the copper pipe and use, increase user's economic consumption's problem.

One side fixedly connected with locating rack 12 that workstation 1 is close to round copper pipe 2, the last sliding surface of locating rack 12 is connected with spacing 13, spacing 13 has two, two spacing 13 are mirror symmetry and set up, spacing 13 and round copper pipe 2 sliding connection, one side fixedly connected with pull rod 19 of spacing 13, when having solved present current most copper pipe and restoreing, need the manual copper pipe of user to put into the polisher with the user and polish, increase user's the operation degree of difficulty, the manual work is operated simultaneously and probably leads to being connected between copper pipe and the sander and make mistakes, lead to the copper pipe after polishing asymmetric, influence the outward appearance of copper pipe, be unfavorable for the copper pipe and use, increase user's economic consumption's problem.

Locating rack 12 is close to one side sliding connection of pull rod 19 has inserted block 15, inserted block 15 and 19 sliding connection of pull rod, inserted block 15 has two, two inserted blocks 15 are mirror symmetry and set up, when having solved present the restoration of most copper pipes, need the manual copper pipe of user to put into the polisher into and polish, increase user's the operation degree of difficulty, the manual work is operated simultaneously and may be leaded to being connected between copper pipe and the sander and make mistakes, lead to the copper pipe after polishing asymmetric, influence the outward appearance of copper pipe, be unfavorable for the copper pipe to use, increase user's economic consumption's problem.

One side fixedly connected with fixed spring 16 that pull rod 19 was kept away from to inserted block 15, fixed spring 16 respectively with two 15 fixed connection of inserted block, one side sliding connection that locating rack 12 is close to inserted block 15 has the piece 17 that hinders, when having solved present current most copper pipe restoration, need the manual copper pipe of user to put into the polisher with the copper pipe and polish, increase user's the operation degree of difficulty, the manual work is operated simultaneously and may be leaded to being connected between copper pipe and the sander and make mistakes, lead to the copper pipe after polishing asymmetric, influence the outward appearance of copper pipe, be unfavorable for the copper pipe to use, increase user's economic consumption's problem.

Insert block 15 has been close to one side of block 17 and has been seted up the slot, block 17 and 15 sliding connection of insert block, one side sliding connection that pull rod 19 is close to insert block 15 has dog 18, insert block 15 is close to one side of dog 18 and has been seted up the spout, dog 18 and 15 sliding connection of insert block, when having solved present most copper pipes and restoreing, need the manual copper pipe of user to put into the polisher with the copper pipe and polish, increase user's the operation degree of difficulty, the manual work is operated simultaneously and may be leaded to being connected between copper pipe and the sander and make mistakes, lead to the copper pipe after polishing asymmetric, influence the outward appearance of copper pipe, be unfavorable for the copper pipe and use, increase user's economic consumption's problem.

The upper section components are matched to achieve the effect that when the copper pipe repairing machine is used, the round copper pipe 2 is placed on the positioning frame 12 through the arrangement of the limiting frame 13, the round copper pipe 2 is clamped by the limiting frame 13 which slides, the pull rod 19 slides along the limiting frame 13, the stop block 17 is pulled, the fixing spring 16 loses constraint to generate elasticity, the insertion block 15 is pushed to be inserted into the pull rod 19, the stop block 18 slides towards the insertion block 15, the stop block 18 is inserted into the insertion block 15 to fix the limiting frame 13, the round copper pipe 2 is constrained, the transmission belt 14 is opened, the transmission belt 14 pushes the round copper pipe 2 to slide towards the direction of the polishing ring 4 for polishing, the sliding stop block 18 is separated from the insertion block 15, the insertion block 15 is pressed to reset, the stop block 17 is pressed towards the direction of the insertion block 15, the limiting frame 13 can be opened immediately, and the problem that when most of existing copper pipes are repaired, a user needs to manually place the round copper pipes into a polishing machine for polishing is solved, increase user's the operation degree of difficulty, the manual work is operated simultaneously and may be leaded to being connected between copper pipe and the sander and makeing mistakes, leads to the copper pipe after polishing asymmetric, influences the outward appearance of copper pipe, is unfavorable for the copper pipe to use, increases user economic consumption's problem.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention in other forms, and any person skilled in the art may apply the above modifications or changes to the equivalent embodiments with equivalent changes, without departing from the technical spirit of the present invention, and any simple modification, equivalent change and change made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the technical spirit of the present invention.