Dust suppression vertical curtain system for busy station renovation project

Abstract

The invention relates to the field of building protection, in particular to a busy station modification project dust suppression vertical curtain system which comprises a base and a mounting seat arranged above the base, the base and the mounting seat are connected through a supporting mechanism, a dust suppression mechanism is arranged on the base and comprises a dust suppression vertical curtain and a sliding plate, and the top of the dust suppression vertical curtain is fixedly connected with the sliding plate. The bottom of the dust suppression vertical curtain is fixedly connected with the base, a driving mechanism used for driving the sliding plate to ascend and descend is installed between the base and the installation base, and a guide mechanism used for limiting the dust suppression vertical curtain is installed between the base and the installation base. According to the invention, the problem of influence on the health of surrounding people is solved.

Description

Technical Field

[0001] The present invention relates to the field of building protection, in particular to a dust suppression curtain system for a busy station renovation project. Background Art

[0002] With the continuous increase in passenger volume and travel demands at stations, transport organization and safe production at busy stations are becoming increasingly important. However, large-scale construction and renovation work within station waiting rooms generates significant amounts of dust, impacting the passenger environment and the health of station staff. To effectively control and reduce dust pollution during construction, improve air quality in station waiting rooms, and ensure passenger comfort and safety, multiple curtain walls are typically used to enclose the construction site, thereby blocking the dust.

[0003] In the related technology, the building protective curtain wall includes a base, on which a curtain wall body is rotatably installed, and a threaded barrel is rotatably installed on the base, a screw is passed through the threaded barrel, and the end of the screw away from the threaded barrel is rotatably connected to the curtain wall body, and the threaded barrel is rotated, and the threaded barrel drives the screw to move, and the screw drives the curtain wall body to flip, so that the inclination angle of the curtain wall body can be adjusted, and a water spray pipe is fixedly connected to the top of the curtain wall body, and a plurality of nozzles are provided on the water spray pipe, and the water spray pipe is connected to an external water outlet pipe, and the water mist sprayed by the water spray pipe can further block the dust, and a fixing plate is provided on one side of the curtain wall body, and a fixing groove is provided on the other side of the curtain wall body, and the fixing plate can be inserted into the adjacent fixing groove, thereby connecting two adjacent curtain wall bodies.

[0004] Regarding the above-mentioned related technologies, when using building curtain walls to block dust, if the construction site is located in a limited indoor height or in a relatively open outdoor area, the building curtain wall cannot adjust its own height according to the use environment and cannot block the dust well, which may easily affect the health of surrounding personnel. Summary of the Invention

[0005] In order to solve the problem of impact on the health of surrounding personnel, the present invention provides a dust suppression curtain system for busy station renovation projects.

[0006] The present invention provides a dust suppression curtain system for busy station renovation projects, which adopts the following technical solutions: A dust suppression curtain system for a busy station renovation project includes a base and a mounting seat arranged above the base, the base and the mounting seat are connected by a supporting mechanism, a dust suppression mechanism is arranged on the base, the dust suppression mechanism includes a dust suppression curtain and a slide, the top of the dust suppression curtain is fixedly connected to the slide, and the bottom of the dust suppression curtain is fixedly connected to the base, a driving mechanism for driving the slide to rise and fall is installed between the base and the mounting seat, and a guide mechanism for limiting the dust suppression curtain is installed between the base and the mounting seat.

[0007] Preferably, the dust suppression curtain includes multiple first curtains and multiple second curtains, the multiple first curtains and multiple second curtains are staggered, the multiple first curtains and multiple second curtains are connected end to end, the first curtain at the top is connected to the skateboard through a third curtain, and the first curtain at the bottom is connected to the base through a fourth curtain, and support plates are fixedly connected to both sides of the first curtain, and the length of the support plates is the same as the width of the first curtain.

[0008] Preferably, a fixing seat is fixedly connected to the base, and the driving mechanism includes a driving shaft rotatably mounted on the fixing seat and a driven shaft rotatably mounted on the mounting seat. The driving shaft and the driven shaft are both fixedly connected to conveying wheels, and conveying chains are sleeved on the two conveying wheels. The conveying chains are fixedly connected to the slide, and a handwheel is fixedly connected to the driving shaft.

[0009] Preferably, the second curtain is made of a flexible material, and is provided with a plurality of ventilation holes, which are evenly distributed along the length direction of the second curtain.

[0010] Preferably, the guide mechanism includes a guide steel rope fixedly connected between the base and the mounting seat, a rotating rod fixedly connected between the two support plates, a limiting rod is installed on the rotating rod, and the guide steel rope passes through multiple limiting rods in sequence.

[0011] Preferably, the rotating rod is rotatably connected to the limiting rod, and a torsion spring is sleeved on the rotating rod, one end of the torsion spring is fixedly connected to the rotating rod, and the other end of the torsion spring is fixedly connected to the limiting rod. When the first curtain is opened, the bottom of the first curtain located above is lower than the top of the first curtain located below.

[0012] Preferably, a wetting mechanism is installed between the base and the mounting seat, and the wetting mechanism includes a water-absorbing elastic line, which is serpentine and passes through the top and bottom of multiple first curtains in sequence. A plug is fixedly connected to the slide, and one end of the water-absorbing elastic line is connected to the plug. A water tank is fixedly connected to the mounting seat, and a water outlet is provided at the bottom of the water tank. The plug can be inserted into the water outlet, and a closure for sealing the water outlet is installed on the water tank.

[0013] Preferably, the closure member includes a plurality of elastic sheets fixedly connected to the inner wall of the water outlet, the plurality of elastic sheets are all triangular, and the plurality of elastic sheets can form a complete circle.

[0014] Preferably, the supporting mechanism includes a folding arm, one end of the folding arm is rotatably connected to the fixing seat, the other end of the folding arm is rotatably connected to the mounting seat, a rotating drum is rotatably mounted on the base, a rotating rod is threadedly connected in the rotating drum, and the rotating rod is rotatably connected to the folding arm.

[0015] Preferably, the folding arm includes a first connecting plate, a second connecting plate, a third connecting plate, a fourth connecting plate and a fixed plate, the first connecting plate and the second connecting plate are parallel to each other, the third connecting plate and the fourth connecting plate are parallel to each other, the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are all rotatably connected to the fixed plate, the first connecting plate and the second connecting plate are rotatably connected to the fixed seat at one end away from the fixed plate, the third connecting plate and the fourth connecting plate are rotatably connected to the mounting seat at one end away from the fixed plate, the rotating rod is rotatably connected to the first connecting plate, the second connecting plate is fixedly connected to a first gear, and the third connecting plate is rotatably mounted with a second gear that meshes with the first gear.

[0016] In summary, the present invention includes at least the following beneficial technical effects: 1. When dust needs to be blocked, start the driving mechanism, which drives the slide to move upward, and the slide drives the dust suppression curtain to rise. The dust suppression curtain can adjust its height according to the use environment, which can effectively block the dust and solve the problem of affecting the health of surrounding personnel; 2. When the wind is weak, the force exerted by the airflow is weak, and the first curtain can block the airflow, preventing the dust in the airflow from passing through the vents. When the wind is strong, the force exerted by the airflow is strong, and the airflow can pass through the vents, avoiding damage to the dust suppression curtain; 3. When the slide moves to the top, the slide drives the insert pipe to be inserted into the water outlet. The water flow in the water tank can soak the water-absorbing elastic line through the insert pipe, and then soak the first curtain through the water-absorbing elastic line. The soaked first curtain can not only effectively adhere to the dust, but also increase its own weight, thereby improving the stability of the dust suppression curtain during use. The dust on the first curtain moves to the bottom with the water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the dust suppression curtain system for a busy station renovation project according to an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the folding structure of the dust suppression curtain according to an embodiment of the present invention.

[0019] Figure 3 Schematic diagram of the structure of the dust suppression mechanism of the embodiment of the present invention.

[0020] Figure 4 2 is a schematic structural diagram of a driving mechanism according to an embodiment of the present invention.

[0021] Figure 5 2 is a schematic structural diagram of a mounting base according to an embodiment of the present invention.

[0022] Figure 6 Schematic diagram of the structure of the soaking mechanism according to the embodiment of the present invention.

[0023] Figure 7 2 is a schematic structural diagram of a first curtain according to an embodiment of the present invention.

[0024] Figure 8 This invention Figure 6 Schematic diagram of the enlarged structure of part A.

[0025] Figure 9 It is a schematic diagram of the folding structure of the support mechanism according to an embodiment of the present invention.

[0026] Explanation of the accompanying drawings: 1. Base; 11. Fixed seat; 2. Mounting seat; 3. Support mechanism; 31. Rotating drum; 32. Rotating rod; 33. First connecting plate; 34. Second connecting plate; 341. First gear; 35. Third connecting plate; 351. Second gear; 36. Fourth connecting plate; 37. Fixed plate; 4. Dust suppression mechanism; 41. Slide plate; 42. First curtain; 43. Second curtain; 431. Ventilation port; 44. Third curtain; 45. Fourth curtain; 46. Support plate; 5. Driving mechanism; 51. Driving shaft; 52. Driven shaft; 53. Conveying wheel; 54. Conveying chain; 55. Handwheel; 6. Guide mechanism; 61. Guide steel rope; 62. Rotating rod; 63. Limiting rod; 64. Torsion spring; 7. Soaking mechanism; 71. Water-absorbing elastic line; 72. Intubation tube; 73. Water tank; 74. Elastic sheet. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 -Attached Figure 9 The present invention is described in further detail.

[0028] The embodiment of the present invention discloses a dust suppression curtain system for busy station renovation projects. Figures 1 to 6The dust suppression curtain system of the busy station renovation project includes two bases 1 and a mounting base 2 arranged above the two bases 1. The two bases 1 and the mounting base 2 are connected by a supporting mechanism 3. A U-shaped hanging ear is installed on the top of the mounting base 2, and the U-shaped hanging ear can be connected to the crossbeam. A dust suppression mechanism 4 is provided on the base 1. The dust suppression mechanism 4 includes a dust suppression curtain and a slide plate 41. The top of the dust suppression curtain is fixedly connected to the slide plate 41, and the bottom of the dust suppression curtain is fixedly connected to the base 1. A driving mechanism 5 for driving the slide plate 41 to rise and fall is installed between the base 1 and the mounting base 2, and a guide mechanism 6 for limiting the dust suppression curtain is installed between the base 1 and the mounting base 2; when it is necessary to block the dust, the driving mechanism 5 is started, and the driving mechanism 5 drives the slide plate 41 to move upward, and the slide plate 41 drives the dust suppression curtain to rise. The dust suppression curtain can adjust its own height according to the use environment, can better block the dust, and solves the problem of affecting the health of surrounding personnel.

[0029] Reference Figures 3 to 6 The dust suppression curtain includes multiple first curtains 42 and multiple second curtains 43, and the multiple first curtains 42 and multiple second curtains 43 are arranged in an staggered manner. The multiple first curtains 42 and multiple second curtains 43 are connected end to end, and the first curtain 42 at the top is connected to the slide 41 through a third curtain 44, and the first curtain 42 at the bottom is connected to the base 1 through a fourth curtain 45. The third curtain 44 and the fourth curtain 45 are both flexible, and support plates 46 are fixedly connected to both sides of the first curtain 42, and the length of the support plate 46 is the same as the width of the first curtain 42; when the dust suppression curtain is in a closed state, the multiple first curtains 42 and the multiple second curtains 43 are stacked together, occupying less space. During the movement of the slide 41, the slide 41 drives the first curtain 42 and the second curtain 43 to rise upward, and the support plate 46 supports the first curtain 42, thereby improving the stability of the dust suppression curtain during use.

[0030] Reference Figures 3 to 5 The base 1 is fixedly connected to a fixing seat 11. The driving mechanism 5 includes a driving shaft 51 rotatably mounted on the fixing seat 11 and a driven shaft 52 rotatably mounted on the mounting seat 2. The driving shaft 51 and the driven shaft 52 are fixedly connected to a conveying wheel 53. A conveying chain 54 is sleeved on the two conveying wheels 53. The conveying chain 54 is fixedly connected to the slide 41. A handwheel 55 is fixedly connected to the driving shaft 51. A bolt is installed on the handwheel 55 to limit the handwheel 55. When the handwheel 55 is rotated, the handwheel 55 drives the driving shaft 51 to rotate, and the driving shaft 51 drives the conveying wheel 53 to rotate. The conveying wheel 53 drives the conveying chain 54 to move, and the conveying chain 54 drives the slide 41 to move, so that the dust suppression curtain can be raised, which is convenient for the staff to operate.

[0031] Reference Figure 6 and Figure 7The second curtain 43 is made of flexible material and is provided with a plurality of vents 431, which are evenly distributed along the length of the second curtain 43; when the dust suppression curtain is subjected to strong wind force, the air flow can pass through the plurality of vents 431 through the dust suppression curtain, thereby preventing the strong wind force from causing damage to the dust suppression curtain.

[0032] Reference Figures 4 to 7 The guide mechanism 6 includes a guide steel rope 61 fixedly connected between the base 1 and the mounting seat 2, a rotating rod 62 fixedly connected between the two support plates 46, a limit rod 63 is installed on the rotating rod 62, and the guide steel rope 61 passes through multiple limit rods 63 in sequence; during the raising of the first curtain 42, the first curtain 42 drives the support plate 46 to move, the support plate 46 drives the rotating rod 62 to move, and the rotating rod 62 drives the limit rod 63 to slide along the guide steel rope 61. The guide steel rope 61 can limit the first curtain 42, further improving the stability of the dust suppression curtain during use.

[0033] Reference Figures 4 to 7 When the first curtain 42 is in use, the first curtain 42 is in a tilted state, the rotating rod 62 is located on one side of the first curtain 42 near the top, and the rotating rod 62 is rotatably connected to the limit rod 63. A torsion spring 64 is sleeved on the rotating rod 62, one end of the torsion spring 64 is fixedly connected to the rotating rod 62, and the other end of the torsion spring 64 is fixedly connected to the limit rod 63. When the first curtain 42 is opened, the bottom of the first curtain 42 located above is lower than the top of the first curtain 42 located below; the torsion spring 64 provides a continuous force to the rotating rod 62, and the rotating rod 62 exerts a force on the support plate 46, so that there can be a gap between the two adjacent first curtains 42 for air flow to pass through the vent 431. When the wind is weak, the force exerted by the air flow is weak, and the first curtain 42 can block the air flow to prevent dust in the air flow from passing through the vent 431. When the wind is strong, the force exerted by the air flow is strong, and the air flow can pass through the vent 431 to avoid damage to the dust suppression curtain.

[0034] Reference Figures 4 to 8A soaking mechanism 7 is installed between the base 1 and the mounting seat 2. The soaking mechanism 7 includes a water-absorbing elastic line 71. The water-absorbing elastic line 71 is serpentine and passes through the top and bottom of multiple first curtains 42 in sequence. A plug 72 is fixedly connected to the slide 41. One end of the water-absorbing elastic line 71 is connected to the plug 72. A water tank 73 is fixedly connected to the mounting seat 2. A water outlet is provided at the bottom of the water tank 73. The plug 72 can be inserted into the water outlet. The water tank 73 is equipped with a device for The water outlet is sealed with a closure member; when the slide plate 41 moves to the top, the slide plate 41 drives the insert pipe 72 to be inserted into the water outlet, and the water flow in the water tank 73 can soak the water-absorbing elastic line 71 through the insert pipe 72, and soak the first curtain 42 through the water-absorbing elastic line 71. The first curtain 42 after being soaked can not only effectively adhere to the dust, but also increase its own weight, thereby improving the stability of the dust suppression curtain during use, and the dust on the first curtain 42 moves to the bottom with the water flow.

[0035] Reference Figures 6 to 8 The closure member includes a plurality of elastic sheets 74 fixedly connected to the inner wall of the water outlet. The plurality of elastic sheets 74 are all triangular, and the plurality of elastic sheets 74 can form a complete circle. When the insert tube 72 is inserted into the water outlet, the insert tube 72 pushes the plurality of elastic sheets 74 to flip over, so that the water outlet is opened. When the insert tube 72 is separated from the elastic sheets 74, the plurality of elastic sheets 74 continue to seal the water outlet.

[0036] Reference Figures 1 to 9 The supporting mechanism 3 includes a folding arm, which can be set to multiple folding arms. One end of the folding arm is rotatably connected to the fixed seat 11, and the other end of the folding arm is rotatably connected to the mounting seat 2. A rotating drum 31 is rotatably installed on the base 1, and a rotating rod 32 is threadedly connected to the rotating drum 31, and the rotating rod 32 is rotatably connected to the folding arm; the rotating drum 31 is rotated, and the rotating drum 31 drives the rotating rod 32 to move, and the rotating rod 32 drives the folding arm to rise and fall, and the folding arm drives the mounting seat 2 to rise and fall, and can adjust the height of the mounting seat 2, which not only increases the scope of use of the dust suppression curtain, but also facilitates the staff to install and disassemble the water tank 73.

[0037] Reference Figures 4 to 9The folding arm includes a first connecting plate 33, a second connecting plate 34, a third connecting plate 35, a fourth connecting plate 36 and a fixed plate 37. The first connecting plate 33 and the second connecting plate 34 are parallel to each other, and the third connecting plate 35 and the fourth connecting plate 36 are parallel to each other. The first connecting plate 33, the second connecting plate 34, the third connecting plate 35 and the fourth connecting plate 36 are all rotatably connected to the fixed plate 37. The ends of the first connecting plate 33 and the second connecting plate 34 away from the fixed plate 37 are rotatably connected to the fixed seat 11, and the ends of the third connecting plate 35 and the fourth connecting plate 36 away from the fixed plate 37 are rotatably connected to the mounting seat 2. The rotating rod 32 is rotatably connected to the first connecting plate 33, the second connecting plate 34 is fixedly connected to the first gear 341, and the third connecting plate 35 is rotatably installed with the second gear 351 that meshes with the first gear 341; during the movement of the rotating rod 32, the rotating rod 32 drives the first connecting plate 33 to rotate, the first connecting plate 33 drives the fixed plate 37 to rotate, the fixed plate 37 drives the first gear 341 to rotate, the first gear 341 drives the second gear 351 to rotate, the second gear 351 drives the third connecting plate 35 to rotate, and the third connecting plate 35 drives the mounting base 2 to rise and fall.

[0038] The implementation principle of the dust suppression curtain system for a busy station renovation project in an embodiment of the present invention is as follows: when it is necessary to block dust, the hand wheel 55 is rotated, the hand wheel 55 drives the drive shaft 51 to rotate, the drive shaft 51 drives the conveying wheel 53 to rotate, the conveying wheel 53 drives the conveying chain 54 to move, the conveying chain 54 drives the slide 41 to move, the slide 41 drives multiple first curtains 42 and multiple second curtains 43 to rise, the dust suppression curtain can adjust its own height according to the use environment, when the slide 41 moves to the top, the slide 41 drives the intubation tube 72 to be inserted into the water outlet, and the water in the water tank 73 flows The water-absorbing elastic line 71 can be soaked through the intubation 72, and the first curtain 42 can be soaked through the water-absorbing elastic line 71. The soaked first curtain 42 can not only effectively adhere to the dust, but also increase its own weight, thereby improving the stability of the dust suppression curtain during use. The dust on the first curtain 42 moves to the bottom with the water flow; when the wind is small, the force exerted by the airflow is small, and the first curtain 42 can block the airflow to prevent the dust in the airflow from passing through the vent 431. When the wind is strong, the force exerted by the airflow is large, and the airflow can pass through the vent 431 to avoid damage to the dust suppression curtain.

[0039] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dust suppression curtain system for a busy station renovation project, comprising a base (1) and a mounting base (2) arranged above the base (1), characterized in that: The base (1) and the mounting seat (2) are connected via a supporting mechanism (3). A dust suppression mechanism (4) is provided on the base (1). The dust suppression mechanism (4) includes a dust suppression curtain and a slide plate (41). The top of the dust suppression curtain is fixedly connected to the slide plate (41), and the bottom of the dust suppression curtain is fixedly connected to the base (1). A driving mechanism (5) for driving the slide plate (41) to rise and fall is installed between the base (1) and the mounting seat (2). A dust suppression curtain is limited between the base (1) and the mounting seat (2). The guide mechanism (6) comprises a plurality of first curtains (42) and a plurality of second curtains (43), wherein the plurality of first curtains (42) and the plurality of second curtains (43) are arranged in an interlaced manner, and the plurality of first curtains (42) and the plurality of second curtains (43) are connected end to end, the first curtain (42) at the top is connected to the slide plate (41) via a third curtain (44), and the first curtain (42) at the bottom is connected to the base (1) via a fourth curtain (45), and both sides of the first curtain (42) are fixed. The first curtain (42) is fixedly connected to a support plate (46), the length of the support plate (46) being the same as the width of the first curtain (42); the second curtain (43) is made of a flexible material, and a plurality of vents (431) are provided on the second curtain (43), and the plurality of vents (431) are evenly distributed along the length direction of the second curtain (43); the guide mechanism (6) comprises a guide steel rope (61) fixedly connected between the base (1) and the mounting seat (2); a rotating rod (62) is fixedly connected between the two support plates (46), and the rotating rod A limiting rod (63) is installed on (62), and the guide steel rope (61) passes through multiple limiting rods (63) in sequence; the rotating rod (62) is rotatably connected to the limiting rod (63), and a torsion spring (64) is sleeved on the rotating rod (62), one end of the torsion spring (64) is fixedly connected to the rotating rod (62), and the other end of the torsion spring (64) is fixedly connected to the limiting rod (63). When the first curtain (42) is opened, the bottom of the first curtain (42) located above is lower than the top of the first curtain (42) located below.

2. The dust suppression curtain system for busy station renovation projects according to claim 1 is characterized by: The base (1) is fixedly connected to a fixing seat (11), and the driving mechanism (5) comprises a driving shaft (51) rotatably mounted on the fixing seat (11) and a driven shaft (52) rotatably mounted on the mounting seat (2). The driving shaft (51) and the driven shaft (52) are both fixedly connected to conveying wheels (53). Conveying chains (54) are sleeved on the two conveying wheels (53). The conveying chains (54) are fixedly connected to the slide plate (41). A hand wheel (55) is fixedly connected to the driving shaft (51).

3. The dust suppression curtain system for busy station renovation projects according to claim 1 is characterized by: A soaking mechanism (7) is installed between the base (1) and the mounting seat (2), and the soaking mechanism (7) includes a water-absorbing elastic line (71), the water-absorbing elastic line (71) is serpentine-shaped, and the water-absorbing elastic line (71) sequentially passes through the top and bottom of multiple first curtains (42). The slide plate (41) is fixedly connected to a plug (72), and one end of the water-absorbing elastic line (71) is connected to the plug (72). The mounting seat (2) is fixedly connected to a water tank (73), and a water outlet is provided at the bottom of the water tank (73). The plug (72) can be inserted into the water outlet, and a sealing member for blocking the water outlet is installed on the water tank (73).

4. The dust suppression curtain system for busy station renovation projects according to claim 3 is characterized by: The closure member comprises a plurality of elastic sheets (74) fixedly connected to the inner wall of the water outlet, wherein the plurality of elastic sheets (74) are all triangular in shape, and the plurality of elastic sheets (74) can be combined into a complete circle.

5. The dust suppression curtain system for busy station renovation projects according to claim 1 is characterized by: The support mechanism (3) comprises a folding arm, one end of the folding arm is rotatably connected to the fixing seat (11), and the other end of the folding arm is rotatably connected to the mounting seat (2). A rotating drum (31) is rotatably mounted on the base (1), a rotating rod (32) is threadedly connected to the rotating drum (31), and the rotating rod (32) is rotatably connected to the folding arm.

6. The dust suppression curtain system for busy station renovation projects according to claim 5 is characterized by: The folding arm comprises a first connecting plate (33), a second connecting plate (34), a third connecting plate (35), a fourth connecting plate (36) and a fixed plate (37), wherein the first connecting plate (33) and the second connecting plate (34) are parallel to each other, and the third connecting plate (35) and the fourth connecting plate (36) are parallel to each other, and the first connecting plate (33), the second connecting plate (34), the third connecting plate (35) and the fourth connecting plate (36) are all rotatably connected to the fixed plate (37), and the first connecting plate (33) and the second connecting plate (34) are parallel to each other. One end of the second connecting plate (34) away from the fixed plate (37) is rotatably connected to the fixed seat (11), one end of the third connecting plate (35) and the fourth connecting plate (36) away from the fixed plate (37) is rotatably connected to the mounting seat (2), the rotating rod (32) is rotatably connected to the first connecting plate (33), a first gear (341) is fixedly connected to the second connecting plate (34), and a second gear (351) meshing with the first gear (341) is rotatably mounted on the third connecting plate (35).

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