A multifunctional dustproof equipment for initial support wet spraying in tunnels

Abstract

The utility model discloses a multifunctional dustproof equipment for wet spraying method for initial support in tunnels, aiming to provide a multifunctional dustproof equipment for wet spraying method for initial support in tunnels, which is easy to operate, improves efficiency and reduces dust inhalation. It includes a base, and the base is provided with a support plate, a mixing drum, an upper hopper and a movable plate. The support plate is vertically connected to the base, the movable plate is movably connected to the base, the upper hopper is movably connected to the support plate through the movable plate, the moving trajectory of the upper hopper is oblique movement, one end of the mixing drum is connected to the base, the upper hopper is connected to the other end of the mixing drum in an opening and closing manner, and the movable plate is rotatably connected with a dust shield plate. The beneficial effects of the utility model are: the equipment is easy to operate, the efficiency is improved, and the labor of construction personnel is reduced; dust inhalation is reduced to protect the body of construction personnel; the stability and accuracy of structural operation are improved; the operation fluency and mixing efficiency are improved; it is convenient for material discharge; the degree of automation is improved, and manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of mining tunnels, in particular to a multifunctional dustproof equipment used for an initial support wet spraying method in a tunnel. Background Art

[0002] Wet spraying machine is a device used for wet spraying concrete. It mixes aggregate, cement and water in the designed proportion, presses them to the nozzle with a wet spraying machine, and then adds an accelerator to the nozzle before spraying. The quality of wet spraying concrete is easy to control, and there is little dust and rebound during the spraying process. It is a spraying process that should be developed and applied, but it has high requirements for spraying machinery, and mechanical cleaning and troubleshooting are more troublesome. Compared with dry and wet spraying machines, it has significant advantages such as less operating dust, less spraying rebound, protection of the working environment, saving raw materials, and improving the quality of the spraying layer, and it is easy to operate and maintain.

[0003] China Patent Authorization Announcement Number: CN 211287716 U, Authorization Announcement Date: August 18, 2020. This utility model discloses a convenient wet spraying machine for tunnel support, including a bottom plate, a mixing barrel fixedly connected to one side of the top surface of the bottom plate, a sealing cover fixedly connected to the top of the mixing barrel by bolts, a water inlet opened on one side of the top surface of the sealing cover, a driving motor fixedly connected to the center of the top surface of the sealing cover, and a stirring rod fixedly connected to the output end of the driving motor. The shortcomings of this technical solution are: 1. It is laborious to put the raw material bag into the support bucket, and the support bucket is difficult to fix the raw material bag. When dumping, it needs to be deformed and requires more fixed operations, resulting in cumbersome operation and more dust inhalation; 2: The fit between the raw material bag opening and the feed hopper opening is loose during material discharge, resulting in dust leakage, and the construction personnel need to always lift the unloading handle, which is laborious, reduces operating efficiency and is easy to inhale dust.

[0004] In summary, wet spraying equipment has the disadvantages of being time-consuming and labor-intensive when adding raw materials during mixing, reducing operating efficiency, and easily inhaling dust, which harms the health of construction workers. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of wet spraying equipment in the prior art, such as time-consuming and labor-intensive process of adding raw materials during mixing, reduced operating efficiency and easy inhalation of dust that harms the health of construction workers. The utility model provides a multifunctional dust-proof equipment for wet spraying of initial support in tunnels, which is easy to operate, improves efficiency and reduces dust inhalation.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A multifunctional dustproof equipment for initial support wet spraying method in a tunnel comprises a base, wherein the base is provided with a support plate, a mixing drum, an upper hopper and a movable plate, wherein the support plate is vertically connected to the base, the movable plate is movably connected to the base, the upper hopper is movably connected to the support plate via the movable plate, the moving trajectory of the upper hopper is an oblique movement, one end of the mixing drum is connected to the base, the upper hopper is openably connected to the other end of the mixing drum, and the movable plate is rotatably connected to a dust shield plate.

[0008] One side of the base is vertically connected to the support plate, the mixing drum is connected to the front of the support plate and one side of the base, and the upper hopper is connected to the other side. The movable plate pushes the upper hopper through the movable connection with the support plate to make the upper hopper move obliquely on the support plate to the upper port of the mixing drum for low-position loading, and the pushing plate is moved to lift and transport and to open and close the mixing drum to unload materials when it reaches the position, so as to reduce the labor of lifting and carrying by manpower; the dust shielding plate is rotatably connected on the movable plate to block dust when discharging the upper hopper, and prevent the inhalation of a large amount of dust into the lungs when splashing and rising in the narrow space of the tunnel, causing pneumoconiosis and other diseases. The equipment is easy to operate, the efficiency is improved, and the labor of construction workers is reduced, and the inhalation of dust is reduced to protect the body of construction workers.

[0009] Preferably, the upper hopper is a hollow ring structure, the cavity of the upper hopper is set as a discharge cavity, a rotating plate and a support rod are provided in the discharge cavity, a rotating groove is provided in the cavity wall of the discharge cavity, the support rod is connected to the rotating plate, the end of the support rod is plugged into the rotating groove, and the rotating plate is rotatably connected to the upper hopper through the support rod. The upper hopper is an annular cavity structure and the cavity is set as a discharge cavity, a support rod is rotatably connected in the discharge cavity, the rotating plate and the discharge cavity form a space for holding raw materials, the rotating plate is connected to the support rod so that the upper hopper can reach the top of the mixing drum through the rotation of the support rod and release it into the mixing drum, so that the structure can discharge materials flexibly. At the same time, due to the limited shape and space of the gap opened during discharge and the partial obstruction by the rotating plate, the dust splashed in the mixing drum is reduced. It is easy to operate and further reduces the effect of dust inhalation.

[0010] Preferably, the support rod is placed on one side of the center of the discharge chamber and is eccentrically connected to the upper hopper. A locking slide rail is provided on the side of the upper hopper. The structural shape of the locking slide rail is L-shaped. The locking slide rail is placed on the side of the discharge chamber close to the support rod. A limit rod is provided in the locking slide rail. One end of the limit rod is slidably connected to the locking slide rail. The limit rod is placed above the rotating plate and is attached to the rotating plate. The other end of the limit rod is connected to the limit block. The support rod is eccentrically arranged in the discharge chamber, so that the support rod is connected to one side of the rotating plate, so that the rotating plate can naturally droop under the gravity of the other side, which is easier to control the discharge direction and position than the support rod connected to the central axis of the rotating plate; the locking slide rail is L-shaped and connects the inner and outer walls of the mixing drum, so that the limit rod can slide in an L-shaped track on the locking slide rail, which makes it easier for the limit rod to lock against the rotating plate to keep the rotating plate balanced. In addition, the limit rod slides upward along the locking slide rail to open the rotating plate to form a material discharge gap, and the locking slide rail controls the size of the gap to prevent dust from gushing out of the material discharge gap. In addition, material discharge through the limit rod is easy to operate quickly, so that the construction personnel can quickly move away after the material discharge starts, and the material discharge can continue automatically. The effect of further improving the convenience of operation and dust inhalation prevention is achieved.

[0011] Preferably, the support plate is provided with a guide rail, and the upper hopper is provided with a slide bar, one end of the slide bar is connected to the upper hopper, and the other end of the slide bar is plugged into the guide rail, and the slide bar extends out of the support plate and is connected to a limiting plate. The support plate is provided with a guide rail, so that the upper hopper can move obliquely along the guide rail through the slide bar, and the structural shape of the guide rail is a combination of oblique and horizontal transverse shapes, so that the upper hopper moves at a high place and then moves horizontally to the top of the mixing drum for unloading. The effect of improving the stability and accuracy of the structural operation is achieved.

[0012] Preferably, the mixing drum is provided with a rotating mechanism 1, a bracket and a stirring shaft. The rotating mechanism 1 is connected to the bracket. One end of the bracket is connected to the stirring shaft. The other end of the bracket is connected to the wall of the mixing drum. The stirring shaft is connected to the rotating mechanism 1. The stirring shaft is connected to a plurality of stirring blades. The stirring shaft is rotationally connected to the mixing drum through the rotating mechanism 1. The rotating mechanism 1 is fixed in the mixing drum by connecting the bracket. The stirring shaft is connected to the rotating end of the rotating mechanism 1 so that the stirring shaft can drive the stirring blades to rotate in the mixing drum to mix the materials. The bracket facilitates the raw materials to pass through the bracket and fall to the bottom of the drum when the hopper is unloaded. The upper end of the mixing drum can be closed by closing the rotating plate during mixing to perform closed mixing and prevent dust or mud from splashing out. This achieves the effect of improving the operation fluency and mixing efficiency.

[0013] Preferably, the movable plate is provided with a placement groove, the dust shield is embedded with the placement groove, the placement groove is provided with a movable groove, the movable groove is connected with a rotating rod, one end of the dust shield is connected with a rotating block, the rotating block is plugged with the movable groove, the rotating rod is plugged with the rotating block, and the other end of the dust shield is connected with a pull rope and a protrusion. The movable plate is embedded with the dust shield through the placement groove, so that the baffle can be stably stored when not in use so as not to hinder the lower hopper when pushing. In addition, when in use, the dust shield can be stably suspended above the upper hopper with a distance through the connection between the rotating block and the rotating rod and is restricted by the pull rope to be lowered, so that the dust shield can be stably suspended above the upper hopper with a distance, dustproof and does not hinder material discharge; the protrusion facilitates the removal of the rotating dust shield from the placement groove. The effect of improving structural connection, operation convenience and facilitating dust-proof material discharge is achieved.

[0014] Preferably, the support plate is provided with a movable guide rail, the movable plate is connected with a connecting plate, one end of the connecting plate is connected to the movable plate, the support plate is connected with a rotating mechanism 2 and a rotating rod, the rotating mechanism 2 is connected to the support plate, one end of the rotating rod is connected to the rotating mechanism 2, the other end of the rotating rod is threadedly connected to the other end of the connecting plate, and the connecting plate is slidably connected to the movable guide rail. The support plate is provided with a movable guide rail for inserting the connecting plate, so that the connecting plate can reciprocate on the rotating rod under the rotation of the rotating mechanism 2, thereby driving the movable plate to reciprocate on the base, so as to achieve the effect of improving the degree of automation, saving manpower and improving efficiency.

[0015] The beneficial effects of the utility model are: the equipment is easy to operate, the efficiency is improved and the labor of construction workers is reduced; dust inhalation is reduced to protect the health of construction workers; the stability and accuracy of structural operation are improved; the operation fluency and mixing efficiency are improved; the material discharge is convenient; the degree of automation is improved and manpower is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the utility model;

[0017] Figure 2 yes Figure 1 Dorsal view of;

[0018] Figure 3 yes Figure 1 A cross-sectional view of

[0019] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0020] Figure 5 It is a top view of the upper hopper.

[0021] In the figure: 1. base, 2. support plate, 3. mixing drum, 4. upper hopper, 5. movable plate, 6. dust shield, 7. discharge chamber, 8. rotating plate, 9. support rod, 10. locking slide rail, 11. limit rod, 12. limit block, 13. guide slide rail, 14. slide rod, 15. limit plate, 16. rotating mechanism 1, 17. bracket, 18. stirring shaft, 19. stirring blade, 20. placement groove, 21. movable groove, 22. rotating rod, 23. rotating block, 24. pull rope, 25. bump, 26. movable guide rail, 27. connecting rod, 28. rotating mechanism 2, 29. discharge door, 30. water inlet pipe, 31. buffer ring, 32. rotating rod, 33. guide hole, 34. stabilizing rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0023] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0024] Unless otherwise specified, the relative arrangement of the components, numerical expressions and numerical values ​​described in these embodiments do not limit the scope of the present application. For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" are used in the embodiments to illustrate the relationship between an element or feature shown in the figure and another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be fixed "on" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be fixed in other ways (rotated 90 degrees or located in other orientations), and the spatial relative description used here can be interpreted accordingly. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, process and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, process and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.It should be noted that similar reference numerals and letters denote similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0025] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0026] Embodiment 1:

[0027] like Figure 1 , 2 As shown in Figure 3, a multifunctional dust-proof equipment for wet spraying method for initial support in a tunnel comprises a base 1, the base 1 is provided with a support plate 2, a mixing drum 3, an upper hopper 4 and a movable plate 5, the support plate 2 is vertically connected to the base 1, the movable plate 5 is movably connected to the base 1, the upper hopper 4 is movably connected to the support plate 2 via the movable plate 5, the moving trajectory of the upper hopper 4 is oblique movement, one end of the mixing drum 3 is connected to the base 1, the upper hopper 4 is connected to the other end of the mixing drum 3 in an opening and closing manner, and the movable plate 5 is rotatably connected to a dust shield plate 6.

[0028] like Figure 1 , 3As shown, the upper hopper 4 is a hollow ring structure, and the cavity of the upper hopper 4 is set as a discharge cavity 7, and a rotating plate 8 and a support rod 9 are provided in the discharge cavity 7. The cavity wall of the discharge cavity 7 is provided with a rotating groove, the support rod 9 is connected to the rotating plate 8, and the end of the support rod 9 is plugged into the rotating groove. The rotating plate 8 is rotatably connected to the upper hopper 4 through the support rod 9.

[0029] like Figure 1 , 3 As shown in Figure 5, the support rod 9 is placed on one side of the center of the discharge chamber 7 and is eccentrically connected to the upper hopper 4. A locking slide rail 10 is provided on the side of the upper hopper 4. The structural shape of the locking slide rail 10 is L-shaped. The locking slide rail 10 is placed on one side of the discharge chamber 7 close to the support rod 9. A limiting rod 11 is provided in the locking slide rail 10. One end of the limiting rod 11 is slidably connected to the locking slide rail 10. The limiting rod 11 is placed above the rotating plate 8 and is attached to the rotating plate 8. The other end of the limiting rod 11 is connected to the limiting block 12.

[0030] like Figure 3 As shown, the support plate 2 is provided with a guide rail 13, and the upper hopper 4 is provided with a slide rod 14, one end of the slide rod 14 is connected to the upper hopper 4, and the other end of the slide rod 14 is plugged into the guide rail 13, and the slide rod 14 extends out of the support plate 2 and is connected to a limiting plate 15.

[0031] like Figure 3 As shown, the mixing drum 3 is provided with a rotating mechanism 16, a bracket 17 and a mixing shaft 18, the rotating mechanism 16 is connected to the bracket 17, one end of the bracket 17 is connected to the mixing shaft 18, the other end of the bracket 17 is connected to the wall of the mixing drum 3, the mixing shaft 18 is connected to the rotating mechanism 16, the mixing shaft 18 is connected to a plurality of mixing blades 19, and the mixing shaft 18 is rotatably connected to the mixing drum 3 through the rotating mechanism 16.

[0032] like Figure 3 , 4 As shown, the movable plate 5 is provided with a placement groove 20, the dust shield plate 6 is embedded in the placement groove 20, the placement groove 20 is provided with a movable groove 21, the movable groove 21 is connected to a rotating rod 22, one end of the dust shield plate 6 is connected to a rotating block 23, the rotating block 23 is plugged into the movable groove 21, the rotating rod 22 is plugged into the rotating block 23, and the other end of the dust shield plate 6 is connected to a pull rope 24 and a protrusion 25, and the pull rope 24 is connected to the placement groove 20.

[0033] like Figure 2 , 3 As shown, the support plate 2 is provided with a movable guide rail 26, the movable plate 5 is connected to a connecting plate 27, one end of the connecting plate 27 is connected to the movable plate 5, the support plate 2 is connected to a rotating mechanism 28 and a rotating rod 32, the rotating mechanism 28 is connected to the support plate 2, one end of the rotating rod 32 is connected to the rotating mechanism 28, the other end of the rotating rod 32 is threadedly connected to the other end of the connecting plate 27, and the connecting plate 27 is slidably connected to the movable guide rail 26.

[0034] like Figure 1-5 As shown, the mixing drum 3 is connected to a water inlet pipe 30, through which water is added into the mixing drum 3 for mixing. The mixing drum 3 is connected to a discharge gate 29, through which the material is discharged.

[0035] The support plate 2 is provided with a guide hole 33 , and the movable plate 5 is connected with a stabilizing rod 34 , and the stabilizing rod 34 is slidably connected with the guide hole 33 to improve the stability of the movable plate 5 when moving.

[0036] The rotating plate 8 is sleeved with a buffer ring 31, which is made of elastic rubber material to buffer the friction between the side of the rotating plate 8 and the inner wall of the upper hopper 4, while ensuring the sealing to prevent the material from falling prematurely.

[0037] The upper hopper 4 is connected to at least two slide bars 14 , and the moving track of the guide rail 13 is adapted to the slide bars 14 to prevent the upper hopper 4 from tilting during movement, thereby improving the stability of the structural operation.

[0038] When in use: put the open end of the raw material bag into the discharge cavity 7 of the upper hopper 4, pull out the dust shield 6 through the protrusion 25, so that the dust shield 6 is suspended above the raw material bag, hold the other end of the raw material bag and lift it up, so that the dry material in the raw material bag is poured into the discharge cavity 7 and built into the rotating plate 8, and the dust shield 6 blocks the raised dust to prevent the dust from floating up and being inhaled. After the dust settles, the rotating mechanism 28 is started to rotate the rotating rod 32, thereby making the connecting rod 27 move on the rotating rod 32 and drive the moving plate 5 to move synchronously. The upper hopper 4 is pushed by the moving plate 5 to move along the guide slide rail 13, and the slide bar 14 moves on the guide slide rail 13 until the upper hopper 4 is placed on the upper port of the mixing drum 3, and the lower end surface of the upper hopper 4 is close to the upper end surface of the mixing drum 3, and the limit rod 12 is moved, so that the limit rod 11 is translated on the L-shaped locking slide rail 10 and then moves upward, and then one end of the rotating plate 8 follows and moves upward, and the other end is more loaded and moves downward synchronously, thereby forming a gap, so that the raw material enters the mixing drum 3 from the gap. After all the raw materials are poured in, the limit rod 11 is reset to close the gap, and water is introduced through the water inlet pipe 30. After stopping adding water, the rotating mechanism 16 is started to make the stirring shaft 18 in the mixing drum 3 drive the stirring blade 19 to rotate, so that the dry material and the liquid are fully mixed to prepare the mud, and the completed mud is discharged from the discharge door 29. Equipment for wet spraying to prepare materials.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multifunctional dustproof equipment for initial support wet spraying in tunnels, characterized by: The utility model comprises a base (1), wherein the base (1) is provided with a support plate (2), a mixing drum (3), an upper hopper (4) and a movable plate (5), wherein the support plate (2) is vertically connected to the base (1), the movable plate (5) is movably connected to the base (1), the upper hopper (4) is movably connected to the support plate (2) via the movable plate (5), the moving track of the upper hopper (4) is an oblique movement, one end of the mixing drum (3) is connected to the base (1), the upper hopper (4) is openably connected to the other end of the mixing drum (3), and the movable plate (5) is rotatably connected to a dust shield plate (6).

2. The multifunctional dustproof equipment for initial support wet spraying in tunnels according to claim 1 is characterized in that: The upper hopper (4) is a hollow annular structure. The hollow cavity of the upper hopper (4) is set as a discharge cavity (7). A rotating plate (8) and a support rod (9) are provided in the discharge cavity (7). A rotating groove is provided on the cavity wall of the discharge cavity (7). The support rod (9) is connected to the rotating plate (8). The end of the support rod (9) is plugged into the rotating groove. The rotating plate (8) is rotatably connected to the upper hopper (4) through the support rod (9).

3. The multifunctional dustproof equipment for initial support wet spraying in tunnels according to claim 2 is characterized in that: The support rod (9) is arranged on one side of the center of the discharge cavity (7) and is eccentrically connected to the upper hopper (4); a locking slide rail (10) is arranged on the side of the upper hopper (4); the locking slide rail (10) has an L-shaped structure; the locking slide rail (10) is arranged on one side of the discharge cavity (7) close to the support rod (9); a limiting rod (11) is arranged inside the locking slide rail (10); one end of the limiting rod (11) is slidably connected to the locking slide rail (10); the limiting rod (11) is arranged above the rotating plate (8) and is in contact with the rotating plate (8); and the other end of the limiting rod (11) is connected to a limiting block (12).

4. The multifunctional dustproof equipment for initial support wet spraying in tunnels according to claim 3 is characterized in that: The support plate (2) is provided with a guide rail (13), and the upper hopper (4) is provided with a slide rod (14). One end of the slide rod (14) is connected to the upper hopper (4), and the other end of the slide rod (14) is plugged into the guide rail (13). The slide rod (14) extends out of the support plate (2) and is connected to a limiting plate (15).

5. The multifunctional dustproof equipment for initial support wet spraying in tunnels according to claim 4 is characterized in that: The mixing drum (3) is provided with a rotating mechanism (16), a bracket (17) and a mixing shaft (18); the rotating mechanism (16) is connected to the bracket (17); one end of the bracket (17) is connected to the mixing shaft (18); the other end of the bracket (17) is connected to the wall of the mixing drum (3); the mixing shaft (18) is connected to the rotating mechanism (16); the mixing shaft (18) is connected to a plurality of mixing blades (19); and the mixing shaft (18) is rotationally connected to the mixing drum (3) via the rotating mechanism (16).

6. A multifunctional dustproof equipment for initial support wet spraying in tunnels according to claim 1 or 5, characterized in that: The movable plate (5) is provided with a placement groove (20), the dust shield plate (6) is embedded in the placement groove (20), the placement groove (20) is provided with a movable groove (21), the movable groove (21) is connected to a rotating rod (22), one end of the dust shield plate (6) is connected to a rotating block (23), the rotating block (23) is plugged into the movable groove (21), the rotating rod (22) is plugged into the rotating block (23), the other end of the dust shield plate (6) is connected to a pull rope (24) and a protrusion (25), and the pull rope (24) is connected to the placement groove (20).

7. The multifunctional dustproof equipment for initial support wet spraying in tunnels according to claim 6 is characterized in that: The support plate (2) is provided with a movable guide rail (26), the movable plate (5) is connected to a connecting plate (27), one end of the connecting plate (27) is connected to the movable plate (5), the support plate (2) is connected to a second rotating mechanism (28) and a rotating rod (32), the second rotating mechanism (28) is connected to the support plate (2), one end of the rotating rod (32) is connected to the second rotating mechanism (28), the other end of the rotating rod (32) is threadedly connected to the other end of the connecting plate (27), and the connecting plate (27) is slidably connected to the movable guide rail (26).

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