CN219257913U

CN219257913U - Case sealer that industrial oil processing was used

Info

Publication number: CN219257913U
Application number: CN202321298904.8U
Authority: CN
Inventors: 惠琴
Original assignee: Guangdong Yuancheng Chemical Co ltd
Current assignee: Guangdong Yuancheng Chemical Co ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-06-27
Anticipated expiration: 2033-05-26

Abstract

The utility model relates to the technical field of product packaging, in particular to a box sealing machine for industrial oil processing. The box sealing machine comprises two vertical plates, wherein the two vertical plates are arranged front and back along, a plurality of rotating rollers are rotationally connected between the two vertical plates, side transmission lines are arranged above the rotating rollers, the side transmission lines are totally two and can mutually approach or mutually separate from each other, an installing plate capable of moving up and down is arranged above the rotating rollers, an upper box sealing mechanism is fixed on the lower surface of the installing plate and is positioned between the two side transmission lines, limiting plates are respectively arranged on the front side and the rear side of the upper box sealing mechanism and have the function of synchronously moving along with the installing plate, each limiting plate can move in the front and rear directions and is positioned above the side transmission line, a lower box sealing mechanism is arranged under the upper box sealing mechanism, and the lower box sealing mechanism is fixed with the two vertical plates. The positions, close to the upper case sealing and the lower case sealing, of the case are limited through the two side transmission lines and the two limiting plates respectively, so that the alignment effect is better when the case is sealed, and the case sealing quality is improved.

Description

Case sealer that industrial oil processing was used

Technical Field

The utility model relates to the technical field of product packaging, in particular to a box sealing machine for industrial oil processing.

Background

At present, with the mass production of a plurality of enterprises, the enterprises commonly use a box sealing machine to seal a packing box in order to improve the production and packing efficiency; the industrial oil is inevitably used in production to a case sealer for sealing the bottled industrial oil in cases.

A box sealer disclosed in application number cn202123024787. X: the flat conveying assembly comprises a frame and a plurality of flat conveying rollers which are rotatably arranged on the frame, the clamping conveying assembly comprises two groups of vertical conveying parts which are arranged above the flat conveying rollers, a clamping conveying space is formed between the two groups of vertical conveying parts, and the cover assembly comprises two groups of cover plates which are symmetrically distributed at the inlet end of the vertical conveying parts so as to enable the packaging box to be in a closed state before packaging; the guiding packaging device comprises a guiding component and a packaging component which are matched, and the guiding component and the packaging component are sequentially arranged above the clamping and conveying space according to the conveying direction of the packaging box so as to sequentially smooth and seal the packaging box. This case sealer receives the power that send the portion immediately and the top receives the extension board at the case sealing in-process, and case top lid is with the time, because case top both sides do not receive external force, the gap appears when probably making case top seal the case, influences the case sealing quality.

A case sealer mechanism disclosed in application number CN 202222407428.0: including the frame, set up unloading transfer chain in the frame, be located unloading transfer chain top and set up the pressfitting subassembly that is used for the lid pressfitting around the carton and be used for the sealing tape subassembly that the case lid sealed in the frame, be fixed with the portal frame in the frame, vertical sliding connection has the crossbeam on the portal frame, still be provided with the drive assembly who is used for driving the longitudinal lift of crossbeam on the portal frame, pressfitting subassembly sets up in one side of crossbeam, sealing tape subassembly sets up the opposite side at the crossbeam. This box sealing mechanism receives the power of side drive belt and the top that the both sides that the case is close to the bottom receive the power of rubberizing tape holder at the box sealing in-process, and the top of case is when the case sealing, because the both sides of case top do not receive external force, appears the gap when probably making case top seal, influences the case sealing quality.

Disclosure of Invention

In order to solve the problems in the background technology, the utility model provides a box sealing machine for industrial oil processing.

In order to achieve the above object, the present utility model provides the following technical solutions:

the utility model provides a case sealer that industrial oil processing was used, includes two risers, two the riser is arranged along the fore-and-aft direction, two it is connected with to rotate between the riser a plurality of axes along the commentaries on classics roller of fore-and-aft direction level setting, a plurality of the axis of commentaries on classics roller is located same horizontal plane, the top of commentaries on classics roller is provided with the side drive line, the side drive line is total two and just drives two through first drive structure the side drive line is towards each other or is kept away from the direction motion each other, first drive structure with riser fixed connection, it is provided with the mounting panel that has the up-and-down motion function to change the roller top, the lower surface fixedly connected with of mounting panel goes up the case sealer and is located two between the side drive line, it all is provided with a limiting plate to go up the front and back both sides of case sealer, every limiting plate all is located the top of side drive line, every limiting plate all drives its along fore-and-aft direction motion through the second drive structure, the second drive structure is connected with mounting panel, it has two case sealings under the connection.

Preferably, the first driving structure comprises first connecting plates, the first connecting plates are two in total, the upper surfaces of the first connecting plates, which are close to two ends, are respectively fixedly connected with the lower ends of the two different vertical plates, the two vertical plates are connected with connecting rods with axes horizontally arranged along the front-back direction in a rotating mode, the connecting rods are two in total and are respectively positioned right above the different first connecting plates, each connecting rod is provided with two sections of threaded sections with different rotation directions, each section of threaded section is provided with a second sliding plate in a threaded fit mode, the second sliding plates are four in total and are in sliding arrangement with the corresponding first connecting plates, the rear ends of the connecting rods are fixedly connected with a second belt wheel, the two second belt wheels are in transmission through second synchronous belts, the upper ends of the second sliding plates are fixedly connected with a third connecting plate, and the upper ends of the second sliding plates on the same connecting rod are fixedly connected with the lower ends of different side transmission lines.

Preferably, the vertical plate at the front side is rotatably connected with a crank, and the crank is fixedly connected with one end of one connecting rod.

Preferably, two equal fixedly connected with stand of one side that the riser kept away from each other, two T shape spouts that set up along vertical direction have been seted up to one side that the stand is relative, every all be provided with the second screw rod that an axis set up along vertical direction in the T shape spout, every the second screw rod all with corresponding the stand rotates to be connected, the both ends of mounting panel respectively with the difference second screw rod screw thread fit, the mounting panel is located part in the T shape spout with corresponding the stand slides and sets up.

Preferably, the upper ends of the two upright posts are fixedly connected with a transverse plate together, the interior of the transverse plate is of a cavity structure, the upper ends of the second screw rods penetrate through the upper ends of the corresponding upright posts and are located in the cavities, the upper ends of the second screw rods are fixedly connected with first belt wheels, two belt wheels are in transmission through a first synchronous belt, a motor is fixedly connected to the transverse plate, and the output end of the motor is fixedly connected with one end of one second screw rod.

Preferably, the second driving structure comprises second connecting plates, the second connecting plates are two in number and are respectively located at the positions of the front side and the rear side of the upper box sealing mechanism, the upper ends of the second connecting plates are fixedly connected with the lower surface of the mounting plate, the front side and the rear side of the upper box sealing mechanism are respectively and rotatably connected with first screw rods, an axis of each first screw rod is horizontally arranged along the front direction and the rear direction, the corresponding second connecting plates are respectively and rotatably connected with the first screw rods, one hand wheel is fixedly connected to one side, away from each first screw rod, of each first screw rod, a first sliding plate is in threaded fit with each first screw rod, each first sliding plate is slidably arranged on the lower surface of the mounting plate, and the lower ends of the two first sliding plates are fixedly connected with the corresponding limiting plates.

Preferably, the second driving structure comprises two telescopic rods with axes arranged along the vertical direction, the telescopic rods are respectively located at the front side and the rear side of the upper case sealing mechanism, the upper ends of the telescopic rods are connected with the lower surface of the mounting plate in a sliding mode, the lower ends of the telescopic rods are connected with the upper ends of the corresponding side transmission lines in a fixed mode, the telescopic rods are located at two sides, far away from each other, of the limiting plates, the uppermost rod section of each telescopic rod is respectively connected with the corresponding limiting plate in a fixed mode, and one side, opposite to each limiting plate, of each limiting plate is located at the same vertical plane, and one side, opposite to each side, of each corresponding side transmission line is located at the same vertical plane.

Compared with the prior art, the utility model has the following beneficial effects: the distance between the two side transmission lines and the distance between the two limiting plates are adjusted to limit the positions, close to the upper case sealing and the lower case sealing, of the case respectively, so that the alignment effect is better when the case is sealed, and the case sealing quality is improved.

Drawings

FIG. 1 is a schematic view showing the overall structure of embodiment 1 of the present utility model;

FIG. 2 is a right side view of embodiment 1 of the present utility model;

FIG. 3 is a schematic diagram of a side drive line drive configuration of the present utility model;

FIG. 4 is a schematic diagram of the drive structure of the mounting plate of the present utility model;

FIG. 5 is a schematic diagram of a driving structure of a limiting plate according to embodiment 1 of the present utility model;

FIG. 6 is a schematic overall structure of embodiment 2 of the present utility model;

FIG. 7 is a right side view of embodiment 2 of the present utility model;

fig. 8 is a schematic diagram of a driving structure of a limiting plate according to embodiment 2 of the present utility model.

In the figure: 1. a vertical plate; 2. a column; 3. a hand wheel; 4. a motor; 5. a first slide plate; 6. an upper box sealing mechanism; 7. a mounting plate; 8. a cross plate; 9. a first screw; 10. a limiting plate; 11. a side driving wire; 12. a lower box sealing mechanism; 13. a crank; 14. a first connection plate; 15. a second connecting plate; 16. a third connecting plate; 17. a second slide plate; 18. a connecting rod; 19. t-shaped sliding grooves; 20. a second screw; 21. a first pulley; 22. a first synchronization belt; 23. a telescopic rod; 24. a rotating roller; 25. a second pulley; 26. and a second synchronous belt.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model; it will be apparent that the described embodiments are only some, but not all, embodiments of the utility model; all other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to fig. 1-5, a box sealing machine for industrial oil processing includes two vertical plates 1, the two vertical plates 1 are arranged in tandem, a plurality of rotating rollers 24 with axes horizontally arranged along the front-rear direction are rotatably connected between the two vertical plates 1, and the axes of the rotating rollers 24 are located on the same horizontal plane.

Be provided with first drive structure between two risers 1, first drive structure includes first connecting plate 14, and first connecting plate 14 is total two, and the upper surface that every first connecting plate 14 is close to both ends respectively with two different risers 1's lower extreme fixed connection, rotate between two risers 1 and be connected with the axis along the connecting rod 18 of fore-and-aft direction level setting, connecting rod 18 total two just are located respectively directly over different first connecting plate 14, all are provided with two sections screw thread sections that revolve to different directions on every connecting rod 18, and equal screw thread fit has a second slide 17 on every section screw thread section, and second slide 17 is total four and with corresponding first connecting plate 14 slip setting. The rear end of each connecting rod 18 is fixedly connected with a second belt wheel 25, the two second belt wheels 25 are driven by a second synchronous belt 26, and the upper end of each second sliding plate 17 is fixedly connected with a third connecting plate 16. The upper ends of the two third connecting plates 16 positioned at the front side or the rear side are fixedly connected with a side driving wire 11, and the right ends of the two side driving wires 11, which are close to one another, are respectively provided with an inclined surface inclined towards the direction away from one another, so that the projection of the two inclined surfaces on the vertical plate 1 forms an opening right-eight-shaped structure, and the two side driving wires 11 are totally arranged above the rotating roller 24. The upper end of the second sliding plate 17 on the same connecting rod 18 is fixedly connected with the lower ends of different side transmission lines 11. The vertical plate 1 positioned at the front side is rotatably connected with a crank 13, and the crank 13 is fixedly connected with one end of one connecting rod 18. According to the size of the box, the crank 13 is rotated to drive the connecting rod 18 to enable the two side transmission lines 11 to move for adjustment, and the inclined surfaces on the two side transmission lines 11 facilitate the box to enter between the two side transmission lines 11.

One side that two risers 1 kept away from each other is equal fixedly connected with stand 2, T shape spout 19 along vertical setting has been seted up to the relative one side of two stands 2, all be provided with the second screw rod 20 that an axis set up along vertical setting in every T shape spout 19, every second screw rod 20 all rotates with corresponding stand 2 to be connected, be provided with mounting panel 7 between two stands 2, mounting panel 7's lower extreme fixedly connected with upper box sealing mechanism 6, upper box sealing mechanism 6 is located between two side drive lines 11, be provided with lower box sealing mechanism 12 under the upper box sealing mechanism 6, lower box sealing mechanism 12 and two risers 1 fixed connection. The two ends of the mounting plate 7 are respectively in threaded fit with different second screws 20, and the part of the mounting plate 7 positioned in the T-shaped sliding groove 19 is arranged in a sliding manner with the corresponding upright post 2. The upper ends of the two upright posts 2 are fixedly connected with a transverse plate 8, and the interior of the transverse plate 8 is of a cavity structure. The upper end of each second screw 20 passes through the upper end of the corresponding upright 2 and is located within the cavity. The upper end of each second screw rod 20 is fixedly connected with a first belt wheel 21, the two first belt wheels 21 are driven by a first synchronous belt 22, a motor 4 is fixedly connected to the transverse plate 8, and the output end of the motor 4 is fixedly connected with one end of one second screw rod 20. The mounting plate 7 is driven to move by the rotation of the motor 4 according to the size of the box, so that the height of the upper box sealing mechanism 6 is adjusted.

The side driving line 11 top is provided with second drive structure, second drive structure includes second connecting plate 15, second connecting plate 15 is total two and be located the front and back both sides of last case sealer mechanism 6 respectively, the upper end of every second connecting plate 15 all with the lower fixed surface of mounting panel 7 is connected, the front and back both sides of going up case sealer mechanism 6 all rotate and be connected with the first screw rod 9 that an axis set up along fore-and-aft direction level, every first screw rod 9 all rotates with corresponding second connecting plate 15 to be connected, one side that two first screw rods 9 keep away from each other is all fixedly connected with a hand wheel 3, equal screw fit has a first slide 5 on every first screw rod 9, every first slide 5 all slides the setting with the lower surface of mounting panel 7, the equal fixedly connected with limiting plate 10 of lower extreme of every first slide 5. The hand wheel 3 is turned to adjust the positions of the two limiting plates 10 according to the size of the box.

In summary, the utility model relates to a box sealer for industrial oil processing, which comprises: when the box is used, the crank 13 is rotated according to the size of the box, one connecting rod 18 is rotated by the rotated crank 13, one second belt pulley 25 is rotated, the other second belt pulley 25 is rotated under the action of the second synchronous belt 26, the other connecting rod 18 is rotated, the rotating connecting rod 18 enables the second sliding plate 17 to slide on the first connecting plate 14, the third connecting plate 16 moves, and the two side transmission lines 11 move towards each other. Then the output end of the motor 4 rotates, one of the second screws 20 rotates, one of the first pulleys 21 rotates, the other first pulley 21 rotates under the action of the first synchronous belt 22, the other second screw 20 rotates, the rotating second screw 20 enables the mounting plate 7 to move downwards, and the upper box sealing mechanism 6 moves downwards until the upper box sealing mechanism is attached to the upper part of the box. Then the first screw 9 is rotated by rotating the hand wheel 3, and the two limiting plates 10 move in directions approaching each other until being attached to the side surface of the box. The box sealing mechanism is the prior art and will not be described in detail here. The box with the sealing cover moving on the rotating roller 24 is limited on the side surface, close to the lower end, of the box by the two side transmission lines 11 in the box sealing process, and meanwhile, the side surface, close to the upper end, of the box is limited by the two limiting plates 10, so that the alignment effect of the box during sealing cover is better, and the box sealing quality is improved.

Example 2

Referring to fig. 6-8, a box sealing machine for industrial oil processing includes two vertical plates 1, the two vertical plates 1 are arranged along the front-rear direction, a plurality of rotating rollers 24 with axes horizontally arranged along the front-rear direction are rotatably connected between the two vertical plates 1, and the axes of the rotating rollers 24 are located on the same horizontal plane.

One side that two risers 1 kept away from each other is equal fixedly connected with stand 2, T shape spout 19 along vertical setting has been seted up to the relative one side of two stands 2, all be provided with the second screw rod 20 that an axis set up along vertical setting in every T shape spout 19, every second screw rod 20 all rotates with corresponding stand 2 to be connected, be provided with mounting panel 7 between two stands 2, mounting panel 7's lower extreme fixedly connected with upper box sealing mechanism 6, upper box sealing mechanism 6 is located between two side drive lines 11, be provided with lower box sealing mechanism 12 under the upper box sealing mechanism 6, lower box sealing mechanism 12 and two risers 1 fixed connection. The two ends of the mounting plate 7 are respectively in threaded fit with different second screws 20, and the part of the mounting plate 7 positioned in the T-shaped sliding groove 19 is arranged in a sliding manner with the corresponding upright post 2. The upper ends of the two upright posts 2 are fixedly connected onto the same transverse plate 8, the interior of the transverse plate 8 is of a cavity structure, the upper end of each second screw rod 20 penetrates through the upper end of the corresponding upright post 2 and is located in the cavity, the upper end of each second screw rod 20 is fixedly connected with a first belt wheel 21, the two first belt wheels 21 are in transmission through a first synchronous belt 22, the transverse plate 8 is fixedly connected with a motor 4, and the output end of the motor 4 is fixedly connected with one end of one second screw rod 20. The mounting plate 7 is driven to move by the rotation of the motor 4 according to the size of the box, so that the height of the upper box sealing mechanism 6 is adjusted.

The side driving line 11 top is provided with the second drive structure, and the second drive structure includes telescopic link 23, and telescopic link 23 is total two and be located the position of the front and back both sides of last case sealer mechanism 6 respectively, and the upper end of every telescopic link 23 all with mounting panel 7's lower surface sliding connection, the lower extreme of two telescopic links 23 respectively with the upper end fixed connection of corresponding side driving line 11, two telescopic link 23 are located two limiting plates 10 one side that keep away from each other and two the pole section of telescopic link 23 top is fixedly connected with limiting plate 10 respectively, and two limiting plate 10 opposite one side and two corresponding side driving line 11 opposite one side are located same vertical plane respectively. The distance between the two limiting plates 10 is also adjusted by adjusting the distance between the two side driving wires 11.

In summary, the utility model relates to a box sealer for industrial oil processing, which comprises: when the box is used, according to the size of the box, the crank 13 is rotated, one connecting rod 18 is rotated by the rotated crank 13, one second belt pulley 25 is rotated, the other second belt pulley 25 is rotated under the action of the second synchronous belt 26, the other connecting rod 18 is rotated, the rotating connecting rod 18 enables the second sliding plate 17 to slide on the first connecting plate 14, the third connecting plate 16 moves, the two side transmission lines 11 move towards the direction close to each other and are attached to the side face of the box, the moving side transmission lines 11 drive the telescopic rods 23 to move towards the direction close to each other, the two limiting plates 10 move towards the direction close to each other, and at the moment, the opposite sides of the two limiting plates 10 can be attached to the opposite side faces of the box. Then the output end of the motor 4 rotates, one of the second screw rods 20 rotates, one of the first belt wheels 21 rotates, the other first belt wheel 21 rotates under the action of the first synchronous belt 22, the other second screw rod 20 rotates, the rotating second screw rod 20 enables the mounting plate 7 to move downwards, the upper box sealing mechanism 6 moves downwards until being attached to the upper part of the box, the telescopic rod 23 contracts, and at the moment, the opposite side of the two limiting plates 10 can be attached to the side face of the box close to the upper end just. The box sealing mechanism is the prior art and will not be described in detail here. The box with the sealing cover moving on the rotating roller 24 is limited on the side surface, close to the lower end, of the box by the two side transmission lines 11 in the box sealing process, and meanwhile, the side surface, close to the upper end, of the box is limited by the two limiting plates 10, so that the alignment effect of the box during sealing cover is better, and the box sealing quality is improved.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a case sealer that industrial oil processing was used, its characterized in that includes two riser (1), two riser (1) are arranged along the fore-and-aft direction, two rotate between riser (1) and be connected with a plurality of axes and follow the commentaries on classics roller (24) of fore-and-aft direction level setting, a plurality of the axis of commentaries on classics roller (24) is located same horizontal plane, the top of commentaries on classics roller (24) is provided with side driving wire (11), side driving wire (11) are total two and drive two through first drive structure side driving wire (11) to be close to each other or keep away from the direction motion each other, first drive structure with riser (1) fixed connection, the lower surface fixedly connected with of mounting panel (7) has upper seal case mechanism (6), upper seal case mechanism (6) are located two side driving wire (11), upper and lower both sides driving wire (10) are located two limit plate (10) and are located two limit structures (10) in the direction of the front and back of the case (1), and the upper seal case mechanism (6) is located two limit plate (10), the lower box sealing mechanism (12) is fixedly connected with the two vertical plates (1).

2. The box sealer for industrial oil processing according to claim 1, wherein the first driving structure comprises a first connecting plate (14), the first connecting plates (14) are two in total, the upper surfaces of the first connecting plates (14) close to two ends are fixedly connected with the lower ends of the two different vertical plates (1) respectively, connecting rods (18) with axes horizontally arranged along the front-back direction are rotationally connected between the two vertical plates (1), the connecting rods (18) are two in total and are respectively located right above the different first connecting plates (14), two sections of threaded sections with different rotation directions are respectively arranged on each connecting rod (18), a second sliding plate (17) is matched on each section of threaded section in a threaded mode, the second sliding plates (17) are four in total and are slidably arranged with the corresponding first connecting plates (14), the rear ends of the connecting rods (18) are fixedly connected with a second belt wheel (25), the two second belt wheels (25) are connected with the upper ends of the second connecting plates (17) through the second belt wheels (26) in a synchronous mode, and the upper ends of the second belt wheels (17) are fixedly connected with the upper ends of the second connecting plates (17).

3. A box sealer for industrial oil processing according to claim 2, characterized in that a crank (13) is rotatably connected to the vertical plate (1) at the front side, and the crank (13) is fixedly connected to one end of one of the connecting rods (18).

4. The box sealer for industrial oil processing according to claim 1, wherein two vertical plates (1) are fixedly connected with one vertical post (2) on one side far away from each other, a T-shaped chute (19) arranged along the vertical direction is formed on one side opposite to the two vertical posts (2), a second screw (20) with an axis arranged along the vertical direction is arranged in each T-shaped chute (19), each second screw (20) is rotationally connected with the corresponding vertical post (2), two ends of the mounting plate (7) are respectively in threaded fit with different second screws (20), and parts of the mounting plate (7) located in the T-shaped chute (19) are slidably arranged with the corresponding vertical posts (2).

5. The box sealer for industrial oil processing according to claim 4, wherein the upper ends of the two upright posts (2) are fixedly connected with a transverse plate (8) together, the interior of the transverse plate (8) is of a cavity structure, the upper end of each second screw rod (20) penetrates through the upper end of the corresponding upright post (2) and is positioned in the cavity, the upper end of each second screw rod (20) is fixedly connected with a first belt wheel (21), the two first belt wheels (21) are driven by a first synchronous belt (22), the transverse plate (8) is fixedly connected with a motor (4), and the output end of the motor (4) is fixedly connected with one end of one second screw rod (20).

6. The box sealer for industrial oil processing according to claim 1, wherein the second driving structure comprises two second connecting plates (15), the second connecting plates (15) are respectively located at the front side and the rear side of the upper box sealing mechanism (6), the upper end of each second connecting plate (15) is fixedly connected with the lower surface of the mounting plate (7), the front side and the rear side of the upper box sealing mechanism (6) are respectively and rotatably connected with first screws (9) with axes horizontally arranged along the front and the rear direction, each first screw (9) is respectively and rotatably connected with the corresponding second connecting plate (15), one side, away from each other, of each first screw (9) is fixedly connected with a hand wheel (3), each first screw (9) is provided with a first sliding plate (5) in a threaded fit, each first sliding plate (5) is respectively and slidably arranged with the lower surface of the mounting plate (7), and the lower ends of the two first sliding plates (5) are respectively and fixedly connected with limit plates (10).

7. The box sealer for industrial oil processing according to claim 1, wherein the second driving structure comprises two telescopic rods (23) with axes arranged along a vertical direction, the telescopic rods (23) are respectively positioned at the front side and the rear side of the upper box sealing mechanism (6), the upper end of each telescopic rod (23) is slidably connected with the lower surface of the mounting plate (7), the lower ends of the two telescopic rods (23) are fixedly connected with the upper ends of the corresponding side transmission lines (11), the two telescopic rods (23) are positioned at one sides of the two limiting plates (10) which are far away from each other, the uppermost rod sections of the two telescopic rods (23) are respectively fixedly connected with the corresponding limiting plates (10), and the opposite sides of the two limiting plates (10) and the opposite sides of the corresponding two side transmission lines (11) are respectively positioned at the same vertical plane.