CN116358301A

CN116358301A - Furnace cover and sintering furnace feeding system

Info

Publication number: CN116358301A
Application number: CN202310347478.0A
Authority: CN
Inventors: 李强; 郭延春; 许德光; 赵云飞; 虞军
Original assignee: Inner Mongolia Beike Jiaotong University Robot Co ltd
Current assignee: Inner Mongolia Beike Jiaotong University Robot Co ltd
Priority date: 2023-04-04
Filing date: 2023-04-04
Publication date: 2023-06-30

Abstract

The application discloses a feeding system of a furnace cover and a sintering furnace, which comprises the furnace cover and a furnace hearth, wherein a feeding furnace mouth of the furnace hearth is connected with the furnace cover; a feeding platform is arranged on the hearth, a feeding port is arranged on the feeding platform, and the feeding port is opposite to the feeding furnace port; the lifting assembly is fixed on the feeding platform, and the adjusting mechanism connected with the lifting assembly is arranged on the feeding platform; the invention solves the problem that the prior art needs to manually complete the operations of uncovering and closing the cover for a plurality of times when the material is injected into the sintering furnace.

Description

Furnace cover and sintering furnace feeding system

Technical Field

The invention relates to the technical field of furnace body feeding equipment, in particular to a furnace cover and a sintering furnace feeding system.

Background

As is well known, sintering furnaces are widely used in the preparation and research of new materials such as nano catalysts, glass, ceramics, steel, cement and the like.

At present, in the feeding process of the traditional sintering furnace, a mode of combining manual operation and mechanical equipment is generally adopted, and referring to fig. 1, a feeding use diagram of the traditional sintering furnace is shown, and when feeding is shown in the diagram, a worker fills a ton bag with raw materials at first; then connecting the ton bags to the crown block under the cooperation of manpower of a worker, starting the crown block, and hanging and carrying the ton bags filled with raw materials to a platform of a sintering furnace; and finally, opening the furnace cover under the artificial action of a worker, lifting and moving the crown block, and pouring the raw materials in the ton bag into the sintering furnace by matching with manpower.

The sintering furnaces in the workshop are usually multiple, and the feeding interval of a single furnace is short (usually about 10 h), so that in the process of injecting the sintering materials, workers are required to complete repeated uncovering and closing operations on the sintering furnaces in a high-temperature environment, and scalding of the workers and fatigue of the workers are easily caused.

Disclosure of Invention

Therefore, the invention aims to provide a furnace cover and a feeding system of a sintering furnace, which solve the problem that the prior art needs to manually complete multiple cover opening and closing operations when feeding materials into the sintering furnace.

In a first aspect, the invention discloses a furnace cover, which comprises a cover body assembly and a frame body assembly, wherein the frame body assembly is used for being connected to a feed port of a sintering furnace and communicated with the feed port; the cover body component is used for being connected to the frame body component and blocking a channel of the frame body component; the lifting assembly is used for moving the cover body assembly onto the frame body assembly.

As a further limitation to the cover body assembly, the cover body assembly comprises a baffle body, a first adsorption area is formed on one side of the baffle body, the first adsorption area is used for being mutually adsorbed with an adsorption block, and the adsorption block is connected to the output end of the lifting assembly; at least two moving feet are arranged on the other side of the baffle body and are used for being connected with the grooves of the frame body component; the baffle body is provided with a locking mechanism which is used for locking with a locking groove of the frame body component.

As a further limitation to the frame assembly, the frame assembly comprises a cylinder, one end of the cylinder is used for being communicated with a feeding furnace mouth on the hearth, the other end of the cylinder is connected with a frame, a circle of channels are formed at the inner side edges of the frame, at least two openings are formed on the channels, and the openings correspond to the movable pins one by one; the frame is connected with a locking groove.

As further optimization of the application, one end of the baffle body is provided with a second adsorption area, a third adsorption area is arranged in the ditch, and the adsorption force generated between the second adsorption area and the third adsorption area is larger than the adsorption force generated between the adsorption block and the first adsorption area; after the second adsorption area and the third adsorption area are close to each other, the locking mechanism and the locking groove are locked.

As a further limitation of the locking mechanism, the locking mechanism comprises a bending shaft, one end of the bending shaft is used for locking with the locking groove, the other end of the bending shaft is connected with a pipe body, and the pipe body is concentrically connected with the gear; a pin shaft is connected in the pipe body in a switching way, a pawl is arranged on the pin shaft, and one end of the pin shaft is fixed with the baffle body; a ratchet wheel is arranged in the pipe body, the ratchet wheel and the pawl form a ratchet wheel mechanism together, and the ratchet wheel mechanism allows the pipe body to rotate towards the locking groove; an elastic component is connected between the gears and the baffle; the toothed plate is arranged on the ditch, and the gear is meshed and linked with the corresponding toothed plate.

The application still includes release mechanism, and wherein, release mechanism includes the floodgate hand, is connected with the floodgate line on the floodgate hand, and the free end and the pawl of floodgate line are connected.

The device comprises a base body, a screw rod, a guide rail driving mechanism and a guide rail driving mechanism, wherein the guide rail is connected with the guide rail in a sliding mode; the seat body is connected with a pin column in a switching way, a ring frame is arranged on the pin column, and the ring frame is connected with the lifting assembly; the base is provided with a servo motor for driving the screw rod.

In a second aspect, the invention discloses a feeding system of a sintering furnace, which comprises a furnace cover and a furnace hearth, wherein a feeding furnace mouth of the furnace hearth is connected with the furnace cover; a feeding platform is arranged on the hearth, a feeding port is arranged on the feeding platform, and the feeding port is opposite to the feeding furnace port; the lifting component is fixed on the feeding platform, and the adjusting mechanism connected with the lifting component is arranged on the feeding platform.

Further, a standby movable hopper assembly is further arranged on the hearth, the standby movable hopper assembly comprises a hopper body, the hopper body is in sliding connection with a vertical rail, a first screw shaft is connected to the hopper body in a threaded manner, the first screw shaft extends vertically and is in rotary connection with the vertical rail, and a motor for driving the first screw shaft is arranged on the vertical rail; the vertical rail is in sliding connection in the horizontal rail, and threaded connection has the second screw shaft on the horizontal rail, and first screw shaft extends along the horizontal direction and rotates with the both ends of horizontal rail and be connected.

The beneficial effects of the invention are as follows:

firstly, the blocking body can be locked on the feeding furnace mouth by combining the locking mechanism and the locking groove; according to the quick separation and closing device, the adsorption force between the adsorption block and the first adsorption area and the lifting assembly are combined, so that quick separation and closing between the baffle body and the feeding furnace mouth can be realized; according to the locking device, the adsorption force between the second adsorption area and the third adsorption area is combined, so that the locking mechanism and the locking groove can be quickly locked, and the working efficiency is improved; compared with the prior art, the automatic cover opening and closing device can automatically open and close the cover without depending on manpower, and can avoid scalding of workers and avoid fatigue of the workers.

Drawings

Fig. 1 is a charging usage diagram of a conventional sintering furnace.

Fig. 2 is an overall view showing the furnace cover.

Fig. 3 is a schematic perspective view of a cover assembly.

Fig. 4 is a schematic perspective view of a frame assembly.

Fig. 5 is a schematic view of an assembled structure of the locking mechanism.

Fig. 6 is a state diagram of the use of the locking mechanism.

FIG. 7 is a view showing the state of use of the brake cable and brake lever.

Fig. 8 is a schematic view of the mounting structure of the adjustment mechanism.

FIG. 9 is a schematic diagram of the overall structure of the feeding system of the sintering furnace.

Fig. 10 is a schematic view of the mounting structure of the spare mobile hopper assembly.

In the figure, a baffle 1, a first adsorption area 2, a moving foot 3, an adsorption block 4, a locking mechanism 5, a bending shaft 501, a pipe body 502, a gear 503, a pin shaft 504, a ratchet 505, a pawl 506, a frame assembly 6, a cylinder body 601, a frame 602, a ditch 603, an opening 604, a locking groove 605, a spring 7, a toothed plate 8, a brake lever 9, a brake cable 10, an adjusting mechanism 11, a sliding rail 1101, a seat 1102, a screw 1103, a pin 1104, a ring frame 1105, an electric telescopic bar 12, a hearth 13, a feeding platform 14, a standby movable hopper assembly 15, a hopper 1501, a vertical rail 1502, a first screw shaft 1503, a transverse rail 1504, a second screw shaft 1505 and a ton package 16.

Description of the embodiments

For a clear understanding of the technical solution of the present application, a furnace cover and a feeding system of a sintering furnace provided in the present application will be described in detail below with reference to specific embodiments and accompanying drawings.

The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification of this application and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in the various embodiments herein below, "at least one", "one or more" means one, two or more than two.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in various places throughout this specification are not necessarily all referring to the same embodiment, but mean "one or more, but not all, embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.

Examples

The embodiment provides a furnace cover, referring to fig. 2, which shows an overall display view of the furnace cover, and can be seen from the figure, the furnace cover comprises a cover body assembly and a frame body assembly 6, wherein the frame body assembly 6 is used for being connected to a feed port of a sintering furnace, and the frame body assembly 6 is communicated with the feed port and used for passing raw materials; the cover assembly is used for being connected to the frame assembly 6 and for blocking a channel of the frame assembly 6.

Specifically, referring to fig. 3, a schematic perspective view of a cover assembly is shown, and as shown in the figure, the cover assembly includes a baffle 1, a first adsorption area 2 is formed on the back of the upper side of the baffle 1, a shielding part is formed on the lower side of the baffle 1, and moving feet 3 are respectively formed on 4 corners of the shielding part; a lifting assembly is arranged above the first adsorption area 2, an adsorption block 4 is connected to the output end of the lifting assembly, the lifting assembly is used for driving the adsorption block 4 to approach the first adsorption area 2, and the adsorption block 4 and the first adsorption area 2 generate mutual attraction when approaching; the upper surface of the right end of the baffle body 1 is provided with a locking mechanism 5.

Specifically, referring to fig. 4, a schematic perspective view of a frame assembly 6 is shown, where the frame assembly 6 includes a cylinder 601, one end of the cylinder 601 is used to communicate with a feeding port on the furnace 13, the other end of the cylinder 601 is connected with a frame 602, a circle of channels 603 is formed at the inner edge of the frame 602, and 2 openings 604 are formed at the front and rear sides of the upper end of the channels 603; a locking groove 605 is connected to the outer edge of the right side of the rim 602.

Specifically, the outer end surface on the right side of the baffle 1 is a second adsorption area, the inner wall surface on the right side of the trench 603 is a third adsorption area, the second adsorption area and the third adsorption area generate mutual attraction when being close to each other, and the adsorption force generated between the second adsorption area and the third adsorption area is larger than the adsorption force generated between the adsorption block 4 and the first adsorption area 2. And (3) injection: the adsorption forces generated on the adsorption block 4, the first adsorption area 2, the second adsorption area and the third adsorption area are all generated by electromagnets, which are common prior art in the market and are not shown in the drawings.

Referring to fig. 2, after the cover assembly and the frame assembly 6 are combined together, the 4 moving pins 3 of the blocking body 1 are respectively in one-to-one correspondence with the 4 openings 604 on the trench 603; when the 4 moving pins 3 are placed in the 4 openings 604, a gap exists between the right end surface of the right moving pin 3 and the inner wall surface on the right side of the ditch 603; after the 4 moving legs 3 are placed in the 4 openings 604, the right side of the ditch 603 adsorbs the moving legs 3 to approach to the right side of the ditch because the adsorption force generated between the adsorption block 4 and the first adsorption area 2 is different from the adsorption force generated between the second adsorption area and the third adsorption area; when the second adsorption area on the right side of the moving leg 3 approaches to the third adsorption area of the ditch 603, the locking mechanism 5 on the baffle 1 gradually turns over to the locking groove 605 side; after the second suction area on the right side of the moving foot 3 approaches the third suction area of the trench 603, the lock mechanism 5 is locked with the lock groove 605. After the locking mechanism 5 and the locking groove 605 are locked, the electromagnet can be powered off, and no continuous adsorption force is required between the adsorption block 4 and the first adsorption area 2 and between the second adsorption area and the third adsorption area. When the cover is opened, only the locking mechanism 5 and the locking groove 605 need to be unlocked.

As a further limitation of the locking mechanism 5, referring to fig. 5, there is shown a schematic diagram of an assembly structure of the locking mechanism 5, in which it can be seen that the locking mechanism 5 includes a bending shaft 501, a transverse shaft of the bending shaft 501 is adapted to fit in a locking groove 605, a vertical shaft end of the bending shaft 501 is connected to a tube body 502, the tube body 502 is perpendicular to a vertical shaft of the bending shaft 501, and one end of the tube body 502 is concentrically connected to a gear 503; a pin shaft 504 is rotationally connected to the pipe body 502, one end of the pin shaft 504 is fixed on the baffle body 1, a ratchet wheel 505 is arranged in the pipe body 502, a pawl 506 is arranged on the pin shaft 504, the ratchet wheel 505 and the pawl 506 jointly form a ratchet mechanism, and the ratchet mechanism allows the pipe body 502 to rotate towards the direction of the locking groove 605; an elastic component (such as a spring 7) is sleeved on the pin shaft 504, and two ends of the spring 7 are respectively connected with the gear 503 and the baffle 1; the front and rear sides of the trench 603 are respectively formed with toothed plates 8, and the gear 503 is engaged with the corresponding toothed plate 8.

The principle of operation of the locking mechanism 5: referring to fig. 6, a state diagram of the use of the locking mechanism 5 is shown, from which it can be seen: in the first case, when the cover is to be closed, under the action of magnetic attraction force, the blocking body 1 approaches to the adjacent edge of the frame 602 (along the direction a), and when the blocking body 1 moves along the direction a, the gear 503 is correspondingly driven to move; under the combined limiting action of the baffle 1 and the toothed plate 8, the gear 503 turns over towards the locking groove 605 (along the direction b); until the movable leg 3 below the baffle 1 is attached to the adjacent trench 603, the locking groove 605 is used for locking the transverse axis of the bending shaft 501; and finally, powering off the electromagnets acting on the second adsorption area and the third adsorption area. In the second case, when the cover is opened, the pawl 506 is unlocked to the ratchet 505, and the spring 7 pulls the gear 503 to return; the gear 503 correspondingly moves on the toothed plate 8 along the opposite direction of the a direction, and the bending shaft 501 correspondingly turns and moves towards the opposite direction of the a direction; finally, the transverse axis of bending shaft 501 is disengaged from locking groove 605, block 1 and moving foot 3 on block 1 are moved back to the original position, moving foot 3 is re-opposed to corresponding opening 604 on trench 603; at this time, the lifting assembly is started for the second time to place the adsorption block 4 at the first adsorption area 2 again, and the electromagnet is utilized to enable the adsorption block 4 and the first adsorption area 2 to generate magnetic attraction for mutual adsorption, so that the lifting assembly is started to lift the baffle body 1.

The baffle body 1 can be locked on the charging furnace mouth by combining the locking mechanism 5 and the locking groove 605; according to the quick separation and closing device, the adsorption force between the adsorption block 4 and the first adsorption area 2 and the lifting assembly are combined, so that the separation body 1 and the feeding furnace mouth can be quickly separated and closed; by combining the adsorption force between the second adsorption area and the third adsorption area, the quick locking action between the locking mechanism 5 and the locking groove 605 can be completed, and the working efficiency is improved; compared with the prior art, the automatic cover opening and closing device can automatically open and close the cover without depending on manpower, and can avoid scalding of workers and avoid fatigue of the workers.

Further, in order to ensure that unlocking can be smoothly realized between the pawl 506 and the ratchet 505, an unlocking mechanism is designed in the application; specifically, as shown in fig. 7, a state diagram of the use of the brake cable 10 and the brake lever 9 is shown, and as can be seen from the figure, the unlocking mechanism comprises the brake lever 9, the brake cable 10 is connected to the brake lever 9, and the free end of the brake cable 10 is connected to the pawl 506. When unlocking is needed, the pressing rod on the brake lever 9 is pressed along the direction c, so that the brake cable 10 is retracted into the cavity of the brake lever 9, and the brake cable 10 correspondingly pulls the pawl 506 to be out of contact with the ratchet wheel 505.

Further, after the lifting assembly takes down the baffle body 1 from the feeding furnace mouth, the lifting assembly and the baffle body 1 need to be adjusted to other proper positions for placement at the moment so as to avoid the cover body from shielding the blanking; for this purpose, the present application proposes an adjustment mechanism 11; specifically, as shown in fig. 8, a schematic diagram of an installation structure of the adjusting mechanism 11 is shown, and as can be seen from the figure, the adjusting mechanism 11 includes a sliding rail 1101, a seat body 1102 is slidably connected in a sliding way of the sliding rail 1101, a screw hole is formed at the bottom of the seat body 1102, a screw 1103 is assembled in the screw hole in a threaded manner, and two ends of the screw 1103 are connected to two ends of the sliding rail 1101 in a switching manner; the seat 1102 is rotatably connected with a pin 1104, and the pin 1104 is connected with a ring frame 1105 for holding the lifting assembly; the base 1102 is bolted with a servo motor, an output shaft of the servo motor is connected with the pin 1104 through a belt, and power generated by the servo motor is transmitted to the pin 1104 through the belt.

The lifting assembly may directly select the electric telescopic bar 12, and the electric telescopic bar 12 is a common prior art in the market, which is not described herein.

Examples

The embodiment provides a feeding system of a sintering furnace, referring to fig. 9, which shows a schematic overall structure of the feeding system of the sintering furnace, and as shown in the figure, the feeding system further comprises a furnace chamber 13, and a furnace cover is connected to a feeding furnace mouth of the furnace chamber 13, besides the furnace cover in the embodiment 1; a feeding platform 14 is arranged on the hearth 13, a feeding port is arranged on the feeding platform 14, and the feeding port is opposite to the feeding furnace port; the feeding platform 14 is provided with a lifting component, and an adjusting mechanism 11 connected with the lifting component is arranged on the feeding platform 14.

Further, if the feeding of the material into the feeding port of the furnace 13 is required, the discharge port of the material bin is required to correspond to the feeding port, but the discharge port of the material bin is inevitably influenced by the cover opening and closing of the furnace cover; in order to solve the above-mentioned problems, as shown in fig. 10, the present application further designs a spare movable hopper assembly 15, which includes a hopper body 1501, wherein the hopper body 1501 is slidably connected to a vertical rail 1502, a first screw shaft 1503 is screwed to the hopper body 1501, the first screw shaft 1503 extends vertically (y direction) and is rotatably connected to two ends of the vertical rail 1502, and a motor (not shown in the figure) for driving the first screw shaft 1503 to rotate is provided on the vertical rail 1502; the vertical rail 1502 is slidably connected within the transverse rail 1504, the bottom of the transverse rail 1504 is threaded with a second screw shaft 1505, and the first screw shaft 1503 extends in the horizontal direction (x-direction) and is rotatably connected to both ends of the transverse rail 1504. When the feeding furnace mouth is required to be fed, the hopper body 1501 is moved to the upper part of the feeding furnace mouth by continuously adjusting the first screw shaft 1503 of the vertical rail 1502 and the second screw shaft 1505 of the transverse rail 1504, the feeding mouth of the hopper body 1501 is opposite to the discharging mouth of the stock bin, and the discharging mouth of the hopper body 1501 is opposite to the feeding furnace mouth; when the blanking is not needed, the bucket body 1501 is adjusted through the vertical rail 1502, the first screw shaft 1503, the horizontal rail 1504 and the second screw shaft 1505, the bucket body 1501 is far away from the feeding furnace mouth, and the influence on the uncovering and closing of the furnace cover is avoided.

Claims

1. The utility model provides a bell, includes lid subassembly, framework subassembly (6), its characterized in that: the frame body component (6) is used for being connected to the feeding hole of the sintering furnace and communicated with the feeding furnace hole; the cover body component is used for being connected to the frame body component (6) and blocking a channel of the frame body component (6); the lifting assembly is used for moving the cover body assembly to the frame body assembly (6).

2. The furnace cover according to claim 1, wherein: the cover body assembly comprises a baffle body (1), a first adsorption area (2) is formed on one side of the baffle body (1), the first adsorption area (2) is used for being mutually adsorbed with the adsorption block (4), and the adsorption block (4) is connected to the output end of the lifting assembly; at least two moving feet (3) are arranged on the other side of the baffle body (1), and the moving feet (3) are used for being connected with grooves of the frame body assembly (6); the baffle body (1) is provided with a locking mechanism (5), and the locking mechanism (5) is used for locking with a locking groove (605) of the frame body assembly (6).

3. The furnace cover according to claim 2, wherein: the frame body assembly (6) comprises a cylinder body (601), one end of the cylinder body (601) is communicated with a feeding furnace mouth on the hearth (13), the other end of the cylinder body (601) is connected with a frame (602), a circle of channels (603) are formed at the inner side edges of the frame (602), at least two openings (604) are formed in the channels (603), and the openings (604) correspond to the movable pins (3) one by one; the frame (602) is connected with a locking groove (605).

4. The furnace cover according to claim 2, wherein: one end of the baffle body (1) is provided with a second adsorption area, a third adsorption area is arranged in the ditch (603), and the adsorption force generated between the second adsorption area and the third adsorption area is larger than that generated between the adsorption block (4) and the first adsorption area (2); after the second adsorption area and the third adsorption area are close to each other, the locking mechanism (5) and the locking groove (605) are locked.

5. The furnace cover according to claim 2, wherein: the locking mechanism (5) comprises a bending shaft (501), one end of the bending shaft (501) is used for locking with the locking groove (605), the other end of the bending shaft (501) is connected with a pipe body (502), and the pipe body (502) is concentrically connected with the gear (503); a pin shaft (504) is connected in the pipe body (502), a pawl (506) is arranged on the pin shaft (504), and one end of the pin shaft (504) is fixed with the baffle body (1); a ratchet wheel (505) is arranged in the pipe body (502), the ratchet wheel (505) and the pawl (506) form a ratchet mechanism together, and the ratchet mechanism allows the pipe body (502) to rotate towards the locking groove (605); an elastic component is connected between the gear (503) and the baffle body (1); the grooves (603) are provided with toothed plates (8), and the gears (503) are meshed and linked with the corresponding toothed plates (8).

6. The furnace cover of claim 5, wherein: the automatic unlocking device further comprises an unlocking mechanism, wherein the unlocking mechanism comprises a brake hand (9), a brake cable (10) is connected to the brake hand (9), and the free end of the brake cable (10) is connected with a pawl (506).

7. The furnace cover according to claim 1, wherein: the device further comprises an adjusting mechanism (11), wherein the adjusting mechanism (11) comprises a sliding rail (1101), a seat body (1102) is connected in a sliding manner in the sliding rail (1101), a screw (1103) is assembled on the seat body (1102) in a threaded manner, and the screw (1103) is connected to the sliding rail (1101) in a switching manner; the seat body (1102) is connected with a pin column (1104) in a switching way, a ring frame (1105) is arranged on the pin column (1104), and the ring frame (1105) is connected with the lifting assembly; a servo motor for driving the screw (1103) is arranged on the seat body (1102).

8. A sintering furnace feeding system, characterized in that: comprising the furnace cover according to any one of claims 1 to 7, further comprising a furnace chamber (13), a charging port of the furnace chamber (13) being connected to the furnace cover; a feeding platform (14) is arranged on the hearth (13), a feeding hole is arranged on the feeding platform (14), and the feeding hole is opposite to the feeding furnace hole; the lifting assembly is fixed on the feeding platform (14), and the adjusting mechanism (11) connected with the lifting assembly is arranged on the feeding platform (14).

9. The sintering furnace feed system of claim 8, wherein: the hearth (13) is also provided with a standby movable hopper assembly (15), wherein the standby movable hopper assembly (15) comprises a hopper body (1501), the hopper body (1501) is in sliding connection with a vertical rail (1502), a first screw shaft (1503) is connected to the hopper body (1501) in a threaded manner, the first screw shaft (1503) extends vertically and is in rotary connection with the vertical rail (1502), and a motor for driving the first screw shaft (1503) is arranged on the vertical rail (1502); the vertical rail (1502) is connected in the transverse rail (1504) in a sliding mode, a second screw shaft (1505) is connected to the transverse rail (1504) in a threaded mode, and the first screw shaft (1503) extends in the horizontal direction and is connected with two ends of the transverse rail (1504) in a rotating mode.