Glass tank blowing machine tool

Abstract

The utility model discloses a glass tank blowing machine tool, which relates to the technical field of glass product processing and comprises a left chuck and a right chuck which can rotate synchronously, the distance between the left chuck and the right chuck is adjustable, an air blowing pipe is arranged in the center of one chuck, and liftable graphite wheels are arranged on the upper side and the lower side of the middle position between the chucks. Two long-distance multi-fire-head combustion mechanisms which can ascend and descend and can automatically swing left and right are symmetrically arranged on the two sides of the lower portion of the middle position between the chucks in a splayed mode, and two arc-shaped graphite plates which are provided with opposite openings and can ascend and descend are arranged between the graphite wheels on the upper side and the lower side and the two chucks respectively. According to the utility model, the blowing applicability of the glass tank body is improved, the wall thickness uniformity and the strength are greatly improved, and finally, the blowing efficiency and the blowing effect are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of glass product processing, in particular to a glass tank body blowing machine tool. Background Art

[0002] The traditional manufacturing method of glass tanks (such as the tanks of glass reactors, etc.) is to melt the glass liquid in a small open glass electric melting furnace of less than 5 tons, and then manually select the materials and blow them into metal molds of different sizes. This method is not only labor-intensive and requires high technical mastery of workers, but also has limited product size and low output. There are also problems such as low utilization rate of glass raw materials, uneven wall thickness, poor strength, bubbles and sand.

[0003] The related research in the prior art on devices that can be used for blowing glass jar bodies, such as patent application CN111439922A, a glass tube shaping machine, etc., can control the diameter of the finished product by setting a graphite wheel with an adjustable upper and lower height distance on the basis of being provided with two left and right chucks that can rotate synchronously and move closer to or farther from each other, and realize heating and softening of the blank under rotating operation and control the position of heating and softening by coordinating the fire head combustion component that can move left and right. Ultimately, it not only effectively reduces the labor intensity and the technical mastery requirements of the workers, improves the utilization rate of glass raw materials, but also realizes the semi-automatic mechanized blowing of large-diameter finished products, solves the problem of bubbles and sand on the surface, and makes the wall thickness more uniform to a certain extent, improves the strength, and ultimately improves the blowing efficiency and blowing effect.

[0004] However, the heating area of ​​the burner components in the prior art is mostly small, and the left and right movement during heating mostly relies on frequent manual assistance, which affects the heating efficiency and heating uniformity, so that the improvement of wall thickness uniformity and even strength is still limited, and the improvement of blowing efficiency and blowing effect is still limited. At the same time, the graphite wheel in the prior art is mostly unidirectional, and its limiting effect is general. In the subsequent extrusion, shrinkage, and stacking operations, it is very easy to further affect the wall thickness uniformity, strength and even blowing effect; in addition, the applicability of the prior art to the blowing of glass can bodies is mostly general. For example, even if a heating gun is equipped in the prior art, additional auxiliary devices are still required to realize the press molding of the end of the can body, which makes the operation more cumbersome and the blowing efficiency is further affected.

[0005] Therefore, a new technical solution is needed to solve the above technical problems. Utility Model Content

[0006] The purpose of the utility model is to provide a glass can body blowing machine to solve the technical problems that the prior art proposed in the above background technology is mostly limited in applicability to the blowing of glass can bodies, at the same time, the heating efficiency and heating uniformity of the flame combustion component in the prior art are general, and the limiting effect of the graphite wheel in the prior art is also general. Finally, the improvement of the uniformity of the wall thickness and even the strength is still limited, and the improvement of the blowing efficiency and the blowing effect is still limited.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A glass can body blowing machine tool comprises two left and right chucks, the two chucks can rotate synchronously and the distance between each other is adjustable, one of the chucks is also provided with a blowing pipe in the center, two long-distance multi-fire head combustion mechanisms that can be lifted and lowered and can automatically swing left and right are respectively provided on both sides below the middle position between the chucks, the two multi-fire head combustion mechanisms are symmetrically arranged in an eight-shaped shape, and graphite wheels that can be lifted and lowered are provided on both upper and lower sides of the middle position between the chucks, and the graphite wheels on the upper and lower sides are also provided with two openings facing each other and liftable arcuate graphite plates between the two chucks, three graphite wheels are provided, one of the graphite wheels is arranged directly above the middle position between the two multi-fire head combustion mechanisms and is lifted and lowered synchronously with one of the arcuate graphite plates, another arcuate graphite plate is provided with a pneumatic pump for driving the lifting thereof, the pneumatic pump is arranged obliquely toward the blank of the glass can body, the remaining two graphite wheels are arranged side by side and spaced below the middle position between the two multi-fire head combustion mechanisms, and the chuck, graphite wheel and arcuate graphite plate are enclosed together to form a limit station that matches the blank of the glass can body.

[0009] Furthermore, the multi-burner combustion mechanism includes a flame spraying assembly inclined toward the blank of the glass tank body, and the flame spraying assembly includes a long gas supply tube I, and a long gas supply tube II arranged obliquely below the outside of the long gas supply tube I and parallel to it, the length directions of the long gas supply tube II and the long gas supply tube I are parallel to the length direction of the blank of the glass tank body, and the long gas supply tube II and the long gas supply tube I are vertically connected to a plurality of evenly distributed short gas supply tubes I, and the side of the long gas supply tube II away from the short gas supply tube I is simultaneously connected to an oxygen tube and a natural gas tube, and the side of the long gas supply tube I away from the short gas supply tube I is vertically connected to a plurality of evenly distributed short gas supply tubes II, and each of the short gas supply tubes II is also connected to two upper and lower parallel flame heads at one end away from the long gas supply tube I, and a platform plate is provided below the long gas supply tube II, and the platform plate faces The side where the blank of the glass tank body is located is arranged obliquely upward, and a support rod is fixed between the bottom of the long air supply tube II and the upper surface of the platform plate. A platform frame is horizontally arranged below the platform plate. The platform frame is a rectangular frame structure and has two left and right parallel guide rails I fixed on the top. The guide rails I are both arranged obliquely upward toward the side where the blank of the glass tank body is located. Two sliders I are fixed at the bottom of the platform plate, and steel ropes are connected to the top of the platform plate. The sliders I slide on the guide rails I one by one through the steel ropes. A guide rail II is horizontally arranged below the platform frame, and the length direction of the guide rail II is perpendicular to the length direction of the guide rail I. A slider II is fixed at the bottom of the platform frame, and the platform frame is also provided with a swing driving mechanism matched therewith, and the slider II slides on the guide rail II through the swing driving mechanism.

[0010] Furthermore, the two steel ropes are jointly provided with a gear transmission mechanism for driving them, and the gear transmission mechanism includes a transmission motor, a transmission gear installed at the output end of the transmission motor, and a chain meshing with the transmission gear and connected to the ground at one end. The two steel ropes are connected to the other end of the chain at one end away from the platform plate after passing through two guide gears respectively. The swing drive mechanism includes a horizontally arranged swing motor and a transmission shaft in a U-shaped structure. One end of the transmission shaft is connected to the output end of the swing motor, and the other end of the transmission shaft is fixed to the side wall of the platform frame close to the output end of the swing motor.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model is provided with a graphite wheel, a multi-burner combustion mechanism, and two chucks that can rotate synchronously and have adjustable distances from each other, and a blowing pipe is provided at the center of one of the chucks, which can preliminarily realize the blowing of the glass jar body. By setting the two multi-burner combustion mechanisms to have a long distance and setting the two multi-burner combustion mechanisms to be symmetrically arranged in an eight-shaped shape and automatically swinging left and right, large-area, fast and uniform heating of the blank of the glass jar body is achieved without relying on frequent manual assistance, which greatly improves the heating efficiency and heating uniformity, and makes the blank of the glass jar body expand more evenly and faster in all directions, thereby greatly improving the uniformity and strength of the wall thickness, and improving the blowing efficiency and blowing effect. At the same time, the utility model The graphite wheel is distributed on both the upper and lower sides to achieve a bidirectional setting of the graphite wheel, which fully guarantees the limiting effect of the graphite wheel during the blowing process of the glass jar body, which further improves the uniformity of the wall thickness, the strength and even the blowing effect, and on this basis, the coordinated setting of the two arc-shaped graphite plates with openings facing each other in the utility model facilitates the end forming of the glass jar body through the direct contact and pressing between the arc-shaped graphite plates and the blank of the glass jar body, which greatly improves the applicability of the blowing of the glass jar body and further improves the blowing efficiency; in addition, the coordinated setting of the graphite wheel, the multi-burner combustion mechanism, and the liftable arc-shaped graphite plate in the utility model further improves the applicability of the blowing of the glass jar body, especially the applicability of the blowing of glass jar bodies of different diameters.

[0013] 2. The multi-flame combustion mechanism in the utility model includes a flame spray assembly inclined toward the blank of the glass tank body, and the flame spray assembly includes a long gas supply tube I, a long gas supply tube II, a short gas supply tube I, a short gas supply tube II, and a flame head. On this basis, in the utility model, the short gas supply tube I and the short gas supply tube II are evenly provided with multiple ones, and each short gas supply tube II is connected to two upper and lower parallel flame heads, which fully ensures the realization of long-distance and large-range uniform heating of the flame spray assembly, thereby further improving the heating efficiency and heating uniformity, and ultimately further improving the blowing efficiency and blowing effect.

[0014] 3. In the utility model, the gear transmission mechanism composed of a transmission motor, a transmission gear and a chain pulls the steel rope to ensure that the platform plate slides on the guide rail I on the top of the platform frame, so that the flame-spraying assembly can move along the length direction of the guide rail I. When the guide rails I are all arranged obliquely upward toward the side where the blank of the glass jar body is located, the lifting and lowering operation of the flame-spraying assembly is fully guaranteed. At the same time, in the utility model, the platform frame and the guide rail II below it slide in coordination under the action of a swing drive mechanism composed of a swing motor and a transmission shaft. When the platform frame and the guide rail II are both horizontally arranged and the length direction of the guide rail II is perpendicular to the length direction of the guide rail I, the left and right swing of the platform frame drives the left and right swing of the flame-spraying assembly, which ultimately further ensures the improvement of the blowing efficiency and the blowing effect.

[0015] 4. During the entire blowing process of the utility model, the blank of the glass jar body is limited or pressed only by the graphite wheel and the arc-shaped graphite plate, and no metal mold is used. This effectively solves the problem that the blowing effect is affected by the easy oxidation of the metal mold during long-term use, and the mold needs to be replaced frequently. This further ensures the applicability of the blowing of the glass jar body while further ensuring the blowing efficiency and blowing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the working principle of the utility model;

[0017] Figure 2 This is a schematic diagram of the working principle of the multi-burner combustion mechanism of the utility model;

[0018] Figure 3 This is a schematic diagram of the working principle of the fire head of the utility model;

[0019] Figure 4 This is a schematic diagram of the working principle of the gear transmission mechanism of the utility model;

[0020] In the figure: 1. left chuck, 2. right chuck, 3. air blowing pipe, 4. graphite wheel Ⅰ, 5. graphite wheel Ⅱ, 6. arc graphite plate Ⅰ, 7. arc graphite plate Ⅱ, 8. pneumatic pump, 9. long air supply pipe Ⅰ, 10. long air supply pipe Ⅱ, 11. short air supply pipe Ⅰ, 12. short air supply pipe Ⅱ, 13. fire head, 14. oxygen pipe, 15. natural gas pipe, 16. platform plate, 17. support rod, 18. platform frame, 19. guide rail Ⅰ, 20. slider Ⅰ, 21. guide rail Ⅱ, 22. slider Ⅱ, 23. swing motor, 24. transmission shaft, 25. steel rope, 26. transmission motor, 27. transmission gear, 28. chain, 29. guide gear. DETAILED DESCRIPTION

[0021] The following examples are used to further illustrate the content of the utility model, but do not limit the application of the utility model.

[0022] See also Figure 1 to Figure 4 , which shows a glass jar blowing machine, comprising a left chuck 1 arranged opposite to each other, and a right chuck 2 arranged opposite to the left chuck 1 and having a blowing pipe 3 in the center (the basic structures such as the frame, distribution box, and control mechanism of the existing glass machine are not described in detail here, but the function realization thereof should not be limited thereby), the left chuck 1 and the right chuck 2 can rotate synchronously and the distance between each other can be adjusted (the basic structures such as the speed regulating motor and the synchronous transmission mechanism used to drive the chucks to rotate synchronously and adjust the distance between the chucks in the normal glass machine are not described in detail here Description, but this should not limit its function realization. At the same time, in this embodiment, the claws of the left chuck 1 and the right chuck 2 are both long claws). A graphite wheel Ⅰ4 is rotatably provided just above the middle position of the left chuck 1 and the right chuck 2. An arcuate graphite plate Ⅰ6 is provided between the graphite wheel Ⅰ4 and the left chuck 1. The arcuate graphite plate Ⅰ6 and the graphite wheel Ⅰ4 are synchronously lifted and lowered (in this embodiment, the arcuate graphite plate Ⅰ6 and the graphite wheel Ⅰ4 can be connected to the output end of a lifting motor to achieve synchronous lifting, and the connection between the normal lifting motor and its action parts is set to It is well known in the art, so no further explanation is given here and it is not shown in the drawings). Two graphite wheels II5 are arranged side by side and spaced below the middle position of the left chuck 1 and the right chuck 2 (in this embodiment, the length directions of the graphite wheels I4 and II5 are parallel to the length direction of the blank of the glass jar body). The graphite wheel II5 can be lifted up and down (in this embodiment, the graphite wheel II5 can also be connected to the output end of a lifting motor to achieve lifting). An arc-shaped graphite plate II7 is arranged between the two graphite wheels II5 and the right chuck 2 (in this embodiment, the arc-shaped graphite plate II7 is arranged between the two graphite wheels II5 and the right chuck 2). The inner surfaces of the graphite plate Ⅰ6 and the curved graphite plate Ⅱ7 are both curved), the openings of the curved graphite plate Ⅱ7 and the curved graphite plate Ⅰ6 are arranged relatively to each other, and the curved graphite plate Ⅱ7 is provided with a pneumatic pump 8 for driving its lifting and lowering, and the pneumatic pump 8 is inclined toward the blank of the glass tank body. The left chuck 1, the right chuck 2, the graphite wheel Ⅰ4, the graphite wheel Ⅱ5, the curved graphite plate Ⅰ6 and the curved graphite plate Ⅱ7 are jointly enclosed to form a limit station that matches the blank of the glass tank body, and two long-distance multi-burner combustion mechanisms are symmetrically arranged in an eight-shaped shape at the lower sides of the limit station.

[0023] Furthermore, the multi-burner combustion mechanism includes a flame spray assembly inclined toward the blank of the glass tank body, and the flame spray assembly includes a long gas supply pipe II10, a short gas supply pipe I11, a long gas supply pipe I9 and a short gas supply pipe II12 connected in sequence (in this embodiment, the long gas supply pipe II10, the short gas supply pipe I11, the long gas supply pipe I9 and the short gas supply pipe II12 are all metal pipes), the long gas supply pipe II10 is arranged obliquely below the outside of the long gas supply pipe I9, and the length directions of the long gas supply pipes I9 and the long gas supply pipes II10 are parallel to the length direction of the blank of the glass tank body, and the short gas supply pipe I11 It is vertically connected between the long gas supply pipe I9 and the long gas supply pipe II10 and is evenly distributed in multiple numbers. The short gas supply pipe II12 is vertically connected to the side of the long gas supply pipe I9 away from the short gas supply pipe I11 and is evenly distributed in multiple numbers. The long gas supply pipe II10 is connected to an oxygen pipe 14 and a natural gas pipe 15 on the side away from the short gas supply pipe I11 (the basic components such as the regulating valve and the switch valve on the normal gas pipe are not described in detail here, but their functions should not be limited thereto). Each short gas supply pipe II12 is connected to two upper and lower parallel fire heads 13 at one end away from the long gas supply pipe I9.

[0024] Furthermore, a platform plate 16 and a platform frame 18 with a rectangular frame structure are sequentially arranged from top to bottom below the long gas supply tube II 10. The platform plate 16 is arranged obliquely upward toward the side where the blank of the glass tank body is located. A support rod 17 is welded between the bottom of the long gas supply tube II 10 and the upper surface of the platform plate 16 (in this embodiment, the support rod 17 is an iron support). The platform frame 18 is arranged horizontally. Two sliders I20 are fixed symmetrically at the bottom of the platform plate 16. Two guide rails I19 for the sliders I20 to slide are arranged obliquely on the top of the platform frame 18 (in this embodiment, the guide rails I19 are arranged obliquely on the top of the platform frame 18). In the embodiment, the slider Ⅰ20 can be mounted on the corresponding guide rail Ⅰ19), the two guide rails Ⅰ19 are parallel to each other and are both arranged obliquely upward toward the side where the blank of the glass jar body is located (in this embodiment, the inclination of the guide rail Ⅰ19 and the inclination of the platform plate 16 match each other), and the top of the platform plate 16 is also connected to a steel rope 25, and the platform plate 16 slides on the guide rail Ⅰ19 through the slider Ⅰ20 and the steel rope 25. The steel ropes 25 of the two multi-burner combustion mechanisms are jointly provided with a gear transmission mechanism for pulling them, and the gear transmission mechanism includes a transmission motor 26, and the transmission motor 2 The output end of the platform frame 18 is provided with a transmission gear 29, and the transmission gear 29 is meshed with a chain 28. One end of the chain 28 is connected to the ground, and the other end of the chain 28 is connected to two steel ropes 25 at the same time. The two steel ropes 25 are respectively arranged around two guide gears 29 (in this embodiment, the position of the guide gear 29 can be set as required). The bottom of the platform frame 18 is symmetrically fixed with a slider II 22, and a guide rail II 21 for the slider II 22 to slide is also horizontally arranged below the platform frame 18 (in this embodiment, the slider II 22 can be set on the corresponding guide rail II 2 1), the length direction of the guide rail II 21 is perpendicular to the length direction of the guide rail I 19, the platform frame 18 is also equipped with a transmission shaft 24 and a swing motor 23, the transmission shaft 24 is a U-shaped structure (in this embodiment, the transmission shaft 24 can be formed by connecting multiple shaft sections), the swing motor 23 is horizontally arranged and the output end is connected to one end of the transmission shaft 24, and the other end of the transmission shaft 24 is fixed to the side wall of the platform frame 18 near the output end of the swing motor 23. The platform frame 18 slides on the guide rail II 21 through the slider II 22, the transmission shaft 24 and the swing motor 23.

[0025] The working principle and workflow of the utility model are as follows:

[0026] First, the blank of the glass jar body (not shown, i.e., the glass tube, hereinafter directly referred to as the glass tube) is installed on the left chuck 1 and the right chuck 2 through the existing crane, so that its two ends are clamped by the left chuck 1 and the right chuck 2 respectively;

[0027] Next, while the left chuck 1 and the right chuck 2 are driven to rotate concentrically, the glass tube is first preheated by the burners 13 on both sides, and then the fire intensity of the burners 13 is adjusted to make the middle of the glass tube evenly heated, and then a hand-held heating gun (the functions and structures of conventional equipment such as cranes and heating guns are well known in the art, and the connection settings are also common knowledge, so no further explanation is given here, and no detailed illustration is shown in the attached drawings) is used to burn both ends of the glass tube so that the entire glass tube is evenly heated;

[0028] Then, the right chuck 2 is moved toward the left chuck 1, and the heated and softened glass tube is slowly squeezed to shrink the material. While shrinking the material, air is continuously delivered into the glass tube through the air blowing tube 3, so that the middle part of the glass tube is expanded, and then the two ends of the glass tube are directly contacted and pressed by the curved graphite plates I6 and II7 to shape the ends;

[0029] Finally, adjust the fire of the burner 13 and continue to burn the glass tube. After the annealing purpose is achieved, remove it.

[0030] During the whole process, the two multi-burner combustion mechanisms can be automatically swung left and right (swinging in a small amplitude) to improve the heating efficiency and heating uniformity and enhance the heating effect. Specifically, the swing motor 23 is started, and under the action of the transmission shaft 24, the platform frame 18 is driven to slide on the guide rail Ⅱ21 below it, and the flamethrower assembly is driven to move left and right along the direction of the guide rail Ⅱ21.

[0031] In addition, the diameter of the glass tube during centrifugal blowing after it is softened by heat can be limited by raising and lowering graphite wheel Ⅰ4 and graphite wheel Ⅱ5, and the glass tube can be further adapted to glass tubes of different diameters by raising and lowering arcuate graphite plate Ⅰ6 and arcuate graphite plate Ⅱ7. By raising and lowering the two multi-burner combustion mechanisms toward the glass tube (raising and lowering in a small range), the glass tube can be further adapted to glass tubes of different diameters. Specifically, the meshing of chain 28 and transmission gear 27 pulls the steel rope 25, which in turn pulls the platform plate 16 to slide on the guide rail Ⅰ19 on the top of the platform frame 18. At this time, the flamethrower assembly is also driven to rise and fall toward the glass tube.

Claims

1. A glass jar blowing machine, comprising two left and right chucks which can rotate synchronously and whose distance from each other is adjustable, wherein a blowing pipe is arranged at the center of one of the chucks, characterized in that: A liftable graphite wheel is provided on both upper and lower sides of the middle position between the chucks; two liftable and automatically swingable long-distance multi-burner combustion mechanisms are symmetrically provided in an "eight" shape on both sides below the middle position between the chucks; the graphite wheels on the upper and lower sides are also provided with two liftable arc-shaped graphite plates with openings facing each other between the two chucks.

2. A glass container blowing machine according to claim 1, characterized in that: The chuck, the graphite wheel and the arc-shaped graphite plate together enclose a limiting station that matches the blank of the glass can body.

3. A glass container blowing machine according to claim 1, characterized in that: There are three graphite wheels, one of which is arranged just above the middle position between two multi-burner combustion mechanisms, and the remaining two graphite wheels are arranged side by side and spaced apart below the middle position between the two multi-burner combustion mechanisms.

4. A glass container blowing machine according to claim 3, characterized in that: The graphite wheel above is synchronously lifted and lowered with one of the arcuate graphite plates, and the other arcuate graphite plate is provided with a pneumatic pump for driving its lifting and lowering, and the pneumatic pump is tilted toward the blank of the glass tank body.

5. A glass container blowing machine according to claim 3, characterized in that: The multi-burner combustion mechanism includes a flame spraying assembly inclined toward the blank of the glass tank body, and the flame spraying assembly includes a long gas supply tube I, and a long gas supply tube II arranged obliquely below the outside of the long gas supply tube I and parallel to it. The length directions of the long gas supply tube II and the long gas supply tube I are parallel to the length direction of the blank of the glass tank body. The long gas supply tube II and the long gas supply tube I are vertically connected to a plurality of evenly distributed short gas supply tubes I. The side of the long gas supply tube I away from the short gas supply tube I is vertically connected to a plurality of evenly distributed short gas supply tubes II, and each of the short gas supply tubes II is also connected to two upper and lower parallel flame heads at one end away from the long gas supply tube I.

6. A glass container blowing machine according to claim 5, characterized in that: The side of the long gas supply pipe II away from the short gas supply pipe I is connected with an oxygen pipe and a natural gas pipe at the same time.

7. A glass container blowing machine according to claim 5, characterized in that: A platform plate is provided below the long gas supply tube II. The platform plate is obliquely arranged upward toward the side where the blank of the glass tank body is located, and a support rod is fixed between the upper surface of the platform plate and the bottom of the long gas supply tube II. A platform frame with a rectangular frame structure is horizontally arranged below the platform plate.

8. A glass container blowing machine according to claim 7, characterized in that: The top of the platform frame is fixedly provided with two parallel guide rails I on the left and right, and the guide rails I are both arranged obliquely upward toward the side where the blank of the glass jar body is located. The bottom of the platform plate is fixed with a slider I that slides in a one-to-one correspondence with the guide rail I. A guide rail II is horizontally arranged below the platform frame, and the length direction of the guide rail II is perpendicular to the length direction of the guide rail I. The bottom of the platform frame is fixed with a slider II that slides in a one-to-one correspondence with the guide rail II.

9. A glass container blowing machine according to claim 8, characterized in that: The platform frames are all provided with a swing driving mechanism cooperating therewith, and the swing driving mechanism includes a horizontally arranged swing motor and a transmission shaft with a U-shaped structure, one end of the transmission shaft is connected to the output end of the swing motor, and the other end of the transmission shaft is fixed to the side wall of the platform frame close to the output end of the swing motor.

10. The glass container blowing machine according to claim 8, characterized in that: The top of each platform plate is connected with a steel rope for pulling it to slide on the corresponding guide rail I. The two steel ropes are jointly provided with a gear transmission mechanism for driving them. The gear transmission mechanism includes a transmission motor, a transmission gear installed on the output end of the transmission motor, and a chain meshing with the transmission gear and connected to the ground at one end. The ends of the two steel ropes away from the platform plate respectively pass around the two guide gears and are connected to the other end of the chain at the same time.

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