Anti-collapse supporting device for tunnel construction

Abstract

The anti-collapse supporting device for tunnel construction is characterized in that two cross beam rods are arranged, the four corners of the side walls of the bottoms of the two cross beam rods are each fixedly connected with a supporting column, a placement base is arranged at the bottoms of the supporting columns and is of a trapezoidal structure, and the side wall of the side, away from the supporting columns, of the placement base is fixedly connected with an anti-skid damping rubber pad; the device has the following advantages that when the ground is uneven, the corresponding rotating disc is rotated according to the inclined direction, the supporting column is driven to ascend and descend according to the threaded connection principle, and therefore the whole device is adjusted to be in the horizontal state; in this way, it can be guaranteed that the top of the tunnel is effectively supported, the situation that the supporting effect is affected by uneven stress caused by inclination is avoided, adjustment can be achieved by rotating the adjusting studs, cutting or welding extension does not need to be conducted on equipment, the application flexibility of the equipment is greatly improved, and the time needed for building is shortened.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel safety support structures, and in particular to an anti-collapse support device for tunnel construction. Background Art

[0002] Tunnels are one of the current ways of road construction. As long as a passage is dug in the mountain to allow the road to be paved, there is no need to go around the mountain. This can greatly shorten the mileage of the road and reduce certain road construction resources and money. With the increasing maturity of tunnel excavation technology and equipment, the speed of tunnel excavation can be further increased and the cost can be reduced.

[0003] After all, tunnels are holes dug in the mountain, so they need to be supported during the construction process to prevent the tunnel from collapsing due to pressure. The use of current support devices requires a flat ground. Any inclination requires cutting or welding of the support equipment, which will increase the time for support installation and increase safety risks. For this reason, a collapse-proof support device for tunnel construction is established. Summary of the invention

[0004] The technical solution adopted by the present invention to solve the technical problem is: a collapse prevention support device for tunnel construction, including a cross beam, wherein the cross beam is provided with two parts, and a support column is fixedly connected to the four corners of the bottom side walls of the two cross beams, and a placement base is provided at the bottom of the support column. The placement base is a trapezoidal structure, and a side wall of the placement base away from the support column is fixedly connected with a non-slip shock-absorbing rubber pad, and the side wall of the support column opposite to the placement base is connected with an adjusting stud through the internal thread, and a limit plate is provided on both sides of the adjusting stud.

[0005] As a preferred technical solution of the present invention, a rotation groove is provided on the side wall at the top of the placing base and opposite to the adjusting stud, and a side groove is provided on the inner circle wall of the rotation groove. The bottom end of the adjusting stud is fixedly connected with a rotating disk, and the rotating disk is a T-shaped structure. The rotating disk is rotatably connected in the rotation groove, and one end of the two limit plates is fixedly connected to the top side wall of the placing base, and the end of the limit plate away from the placing base is telescopically inserted in the support column, and an arc-shaped diagonal support plate is fixedly connected between the support column and the corners of the crossbeam.

[0006] Preferably, the adjusting stud can be driven to rotate by rotating the rotating disk, and the supporting column can be driven to be raised and lowered via the threaded connection, so that the equipment can be adjusted to a horizontal state without the need for cutting or welding extension, which can effectively improve the flexibility and convenience of equipment application.

[0007] As a preferred technical solution of the present invention, displacement grooves are provided on the top side walls of the two cross beams near the middle position, and a conical support plate is set above each of the displacement grooves. A supporting cross plate is fixedly connected to the top of the conical support plate, and the top side wall of the supporting cross plate is detachably connected to the main telescopic rod. An arc-shaped supporting plate is set above the main telescopic rod, and the top of the main telescopic rod is detachably connected to the middle of the bottom side wall of the arc-shaped supporting plate.

[0008] Preferably, the displacement grooves provided enable the crossbeam to be smoothly moved and adjusted laterally without changing the position of the conical support plate, thereby making corresponding adjustments according to the size of the tunnel top, ensuring uniform support for the tunnel, thereby ensuring the stability of the tunnel and improving the support capacity of the equipment.

[0009] As a preferred technical solution of the present invention, side grooves are provided on the opposite side walls in the displacement groove, a follower block is fixedly connected to the middle of the side wall at the bottom end of the conical support plate, and the follower block is slidably connected in the displacement groove, and a ball is fixedly connected to the side walls on both sides of the follower block that are away from each other and opposite to the side grooves, and the ball is slidably connected in the side groove, and three pairs of balls are evenly connected to the bottom side wall of the follower block away from the conical support plate, a rubber layer is fixed to the outer wall of the ball, and the ball is in contact with the bottom side wall in the displacement groove.

[0010] Preferably, the stability of the connection between the follower block and the displacement groove can be increased by establishing balls and side grooves, thereby ensuring the smoothness of the movement of the crossbeam. At the same time, the friction between the bottom of the follower block and the bottom of the displacement groove can be reduced by establishing a conical support plate that supports the cross plate, thereby improving the convenience of lateral movement adjustment of the crossbeam and reducing wear between components.

[0011] As a preferred technical solution of the present invention, a sliding groove is provided in the middle of the side walls at the top of the crossbeam and close to both ends, a screw rod is rotatably connected in the sliding groove, and the side walls at both ends of the crossbeam rod that are away from each other are rotatably connected with knobs, one end of the knob extends into the sliding groove and is detachably connected to one end of the screw rod, a slider is slidably connected in the sliding groove, and the slider is threadedly sleeved on the screw rod.

[0012] Preferably, turning the knob can drive the screw to rotate synchronously, and the threaded connection can be used to drive the slider along the slide slot to adjust the side telescopic rod to different inclination angles or change its position. In this way, the arc support plate can be driven to the specified position for support as needed, and because the inclination angle can be adjusted, sufficient force can be provided for the oblique support.

[0013] As a preferred technical solution of the present invention, the top end of the sliding block is detachably rotatably connected with a side telescopic rod, the arc-shaped support plate is opposite to the crossbeam and the side wall corresponding to the slide groove is provided with an arc-shaped groove, a moving block is slidably connected in the arc-shaped groove, side walls opposite to each other in the arc-shaped groove are provided with side grooves, and a clamping column is slidably connected in the side groove, the clamping column is fixedly connected to the side walls on both sides of the moving block, and the output end of the side telescopic rod is detachably connected to the bottom side wall of the moving block.

[0014] Preferably, an arc groove is opened on the arc support plate so that corresponding adjustments can be made according to the movement of the slider, and at the same time, the side telescopic rod can be smoothly moved to the appropriate position or adjusted to the required inclination angle in cooperation with the extension and retraction of the side telescopic rod, thereby avoiding motion interference through the cooperation of the arc groove and the slider.

[0015] As a preferred technical solution of the present invention, the side walls between the two pairs of support columns are fixedly connected with load-bearing rear baffles, the opposite side walls of the two load-bearing rear baffles are fixedly connected with diagonal support blocks, the top side walls of the diagonal support blocks are detachably connected with follower cross plates, the top side walls of the two adjacent ends of the follower cross plates are detachably connected with fixed hangers, and the fixed hangers are detachably connected to the bottom side walls of the crossbeam through their ends away from the follower cross plates.

[0016] Preferably, the force-bearing rear baffle and diagonal support block are established to evenly distribute the thrust, thereby ensuring that the corresponding support columns are pushed backward synchronously to achieve adjustment of the spacing between the crossbeams. The fixed suspension rod is established to ensure the stability of the follow-up cross plate itself, thereby ensuring smoothness of adjustment.

[0017] As a preferred technical solution of the present invention, a screw groove is opened in the middle of the follower cross plate, the threads in the two screw grooves are in opposite directions, a transverse screw is connected to the threads in the screw grooves, and the thread directions at both ends of the transverse screw correspond to the screw grooves, a rotating column is fixedly connected in the middle of the transverse screw, and the outer ring wall of the rotating column is evenly fixedly connected to the driving fan blade plate.

[0018] Preferably, the driving blade plate is fixed on the outer wall of the rotating column, which makes it easy to quickly and efficiently turn the rotating column, thereby driving the transverse screw to rotate quickly, and driving the two cross beams to adjust the spacing through the threaded connection.

[0019] The present invention has the following advantages: when the ground is uneven, the corresponding rotating disk is rotated according to the direction of inclination, and the supporting column is driven to perform lifting and lowering activities through the principle of threaded connection, so that the entire equipment is adjusted to a horizontal state, which can ensure effective support for the tunnel top and avoid the uneven force caused by inclination affecting the support effect, and the adjustment can be achieved by rotating the adjusting studs, without the need to cut or weld the equipment to extend it, which greatly increases the flexibility of equipment application and shortens the time required for construction, and can be adjusted at any time according to needs in the middle, thereby improving the convenience of equipment application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of a preferred embodiment of the present invention;

[0021] Figure 2 It is a schematic diagram of a partial three-dimensional structure of a support column of a preferred embodiment of the present invention;

[0022] Figure 3 It is a schematic diagram of a partial exploded structure of a crossbeam rod according to a preferred embodiment of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of a transverse screw in a preferred embodiment of the present invention;

[0024] Figure 5 It is a schematic diagram of the exploded structure of a conical support plate according to a preferred embodiment of the present invention.

[0025] Explanation of the reference numerals in the accompanying drawings: 1. crossbeam; 2. conical support plate; 3. receiving cross plate; 4. main telescopic rod; 5. slide groove; 6. slider; 7. wing telescopic rod; 8. moving block; 9. arc-shaped support plate; 10. arc-shaped groove; 11. support column; 12. adjustment stud; 13. rotating disk; 14. limit plate; 15. placement base; 16. rotating groove; 17. screw; 18. clamping column; 19. knob; 20. displacement groove; 21. force-bearing rear baffle; 22. diagonal support block; 23. follower cross plate; 24. transverse screw; 25. fixed suspension rod; 26. rotating column; 27. driving fan blade plate; 28. screw groove; 29. ​​side groove; 30. follower block; 31. ball bearing. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Please refer to Figure 1-25. The present invention provides an anti-collapse support device for tunnel construction, comprising a crossbeam 1, wherein the crossbeam 1 is provided with two pieces, and a support column 11 is fixedly connected to each of the four corners of the bottom side wall of the crossbeam 1, and a placement base 15 is provided at the bottom of the support column 11, and the placement base 15 is a trapezoidal structure, and a non-slip shock-absorbing rubber pad is fixedly connected to the side wall of the placement base 15 away from the support column 11, and an adjusting stud 12 is inserted and connected with the inner thread of the side wall opposite to the support column 11 and the placement base 15, and a limiting plate 14 is provided on both sides of the adjusting stud 12;

[0028] A rotating groove 16 is provided at the top of the placement base 15 and at the side wall opposite to the adjusting stud 12, and a side groove is provided at the inner ring wall of the rotating groove 16. A rotating disk 13 is fixedly connected to the bottom end of the adjusting stud 12. The rotating disk 13 is a T-shaped structure, and the rotating disk 13 is rotatably connected in the rotating groove 16. One end of the two limit plates 14 is fixedly connected to the top side wall of the placement base 15, and the end of the limit plate 14 away from the placement base 15 is telescopically inserted in the support column 11, and the corners between the support column 11 and the crossbeam 1 An arc-shaped diagonal brace plate is fixedly connected, and displacement grooves 20 are opened on the top side walls of the two cross beams 1 and near the middle position. A conical brace plate 2 is set above each displacement groove 20, and a receiving cross plate 3 is fixedly connected to the top of the conical brace plate 2. The top side wall of the receiving cross plate 3 is detachably connected to the main telescopic rod 4, and an arc-shaped supporting plate 9 is set above the main telescopic rod 4. The top of the main telescopic rod 4 is detachably connected to the middle of the bottom side wall of the arc-shaped supporting plate 9.

[0029] The technical effect of this solution is as follows: the equipment is placed at the specified position, and then the arc-shaped support plate 9 is lifted up through the main telescopic rod 4 and the side telescopic rod 7 to support the top of the tunnel. When encountering uneven ground, the corresponding rotating disk 13 is rotated to drive the adjusting stud 12 to rotate, and the support column 11 on the corresponding side is driven to rise and fall through the threaded connection, so that the equipment tilted to the ground is gradually adjusted to a horizontal state. In this way, it can be ensured that the arc-shaped support plate 9 provides sufficient supporting force for the top of the tunnel, avoiding the inability to fully and evenly distribute the supporting force on the top of the tunnel due to the tilt, resulting in a reduction in the supporting effect, and the horizontal adjustment can be achieved only by rotation, which can effectively improve the flexibility of equipment application, and because no welding and cutting operations are required, the convenience of equipment adjustment can be improved, the time for construction and adjustment can be reduced, and the efficiency of supporting equipment deployment can be improved.

[0030] Please refer to Figure 1 , 5The side walls opposite to each other in the displacement groove 20 are provided with side grooves 29, and a follower block 30 is fixedly connected in the middle of the bottom side wall of the conical support plate 2, and the follower block 30 is slidably connected in the displacement groove 20. The side walls of the follower block 30 that are away from each other and opposite to the side grooves 29 are fixedly connected with a ball 31, and the ball 31 is slidably connected in the side groove 29. The bottom side wall of the follower block 30 away from the conical support plate 2 is evenly connected with three pairs of balls 31 for rotation, and a rubber layer is fixed on the outer wall of the ball 31, and the ball 31 is in contact with the bottom side wall of the displacement groove 20.

[0031] The technical effect of this solution is as follows: because the displacement groove 20 is set up, the conical support plate 2 itself is different when the cross beam 1 moves, because the two conical support plates 2 are connected by the receiving cross plate 3, so that the two conical support plates 2 are pulled and positioned against each other. Therefore, when the two cross beams 1 are adjusted to move laterally, the conical support plate 2 itself is stationary, but is adjusted by sliding along the follower block 30 through the slide groove 5. This ensures that the main telescopic rod 4 and the arc-shaped support plate 9 connected thereto are always maintained in the middle position, and a complete support structure is formed by cooperating with the arc-shaped support plates 9 connected to the side telescopic rods 7 on both sides. Moreover, because it can be adjusted laterally, it can be adjusted in real time according to the actual transverse span of the tunnel, thereby ensuring the flexibility and convenience of equipment application and improving the support performance.

[0032] Please refer to Figure 1 , 3 A slide groove 5 is provided at the top of the crossbeam 1 and in the middle of the side walls near both ends, and a screw 17 is rotatably connected in the slide groove 5. The side walls of the two ends of the crossbeam 1 that are away from each other are rotatably connected with knobs 19, one end of the knob 19 extends into the slide groove 5 and is detachably connected to one end of the screw 17, a slider 6 is slidably connected in the slide groove 5, and the slider 6 is threadedly sleeved on the screw 17, and the top of the slider 6 is detachably rotatably connected to the side wing telescopic rod 7, the arc-shaped support plate 9 is opposite to the crossbeam 1 and is provided with an arc groove 10 on the side wall corresponding to the slide groove 5, a moving block 8 is slidably connected in the arc groove 10, side grooves are provided on the opposite side walls in the arc groove 10, and a card column 18 is slidably connected in the side groove, the card column 18 is fixedly connected to the side walls of the moving block 8, and the output end of the side wing telescopic rod 7 is detachably connected to the bottom side wall of the moving block 8.

[0033] The technical effect of this solution is as follows: because the top of the tunnel is an arc-shaped structure, if all the supports are vertically upward, there will inevitably be unstable positions. Therefore, the slide groove 5 and the slider 6 are set up. By moving the slider 6 and adjusting the extension length of the side telescopic rod 7 and the position of the moving block 8 at the same time, the function of adjusting the inclination angle of the side telescopic rod 7 is realized, so that the function of the diagonal support can be realized. Through the vertical lifting of the main telescopic rod 4 and the diagonal support of the two side telescopic rods 7, the top of the tunnel can be completely and evenly supported to ensure the stability of the support.

[0034] Please refer to Figure 1 , 4 The technical effect of this scheme is as follows: the side walls between the two pairs of support columns 11 are fixedly connected with the load-bearing rear baffles 21, the opposite side walls of the two load-bearing rear baffles 21 are fixedly connected with the diagonal support blocks 22, the top side walls of the diagonal support blocks 22 are detachably connected with the follower cross plate 23, the top side walls of the two adjacent ends of the follower cross plates 23 are detachably connected with the fixed suspension rods 25, the fixed suspension rods 25 are detachably connected to the bottom side wall of the crossbeam 1 through the end away from the follower cross plate 23, the thread directions in the two screw grooves 28 are opposite, a transverse screw rod 24 is threadedly connected to the screw groove 28, and the thread directions at both ends of the transverse screw rod 24 correspond to the screw groove 28, a rotating column 26 is fixedly connected in the middle of the transverse screw 24, and the outer ring wall of the rotating column 26 is evenly fixedly connected with the driving fan blade plate 27.

[0035] The technical effect of this solution is as follows: when adjustment is needed, the driving blade plate 27 is moved to drive the rotating column 26 to rotate by driving the blade plate 27. The driving blade plates 27 are set up in multiple pieces and are evenly connected to the surface of the rotating column 26. In this way, the rotating column 26 can be moved at a high speed, thereby increasing the rotation speed of the rotating column 26 and the transverse screw 24. The screw groove 28 is driven to move along the transverse screw 24 through the principle of threaded connection. During the movement of the screw groove 28, force will be applied to the diagonal support block 22 and the stressed rear baffle 21, thereby driving the corresponding support column 11 to move. To ensure smooth movement, a roller with a locking brake structure can be connected to the bottom side wall of the base 15. In this way, the two crossbeams 1 can also be driven to adjust the spacing, thereby moving the arc-shaped support plate 9 connected to the side wing telescopic rods 7 on both sides to a suitable position for support.

[0036] Specifically, when the present invention is used, the device is moved to a suitable position, and then the limit plate 14 is rotated as needed to adjust the height of the support column 11 until the device is adjusted to a horizontal state. The limit plate 14 is set up to limit the support column 11 to ensure the stability of its lifting activity, and then the main telescopic rod 4 and the side telescopic rod 7 are started to drive the arc-shaped support plate 9 to lift upward, so as to support the top of the tunnel, and the two side telescopic rods 7 can be adjusted to a suitable inclination angle as needed to achieve the effect of oblique support, and the cooperation of the two side telescopic rods 7 and the main telescopic rod 4 can evenly support the top of the tunnel, thereby increasing the support effect;

[0037] When lateral adjustment is required, the staff is lifted to the position of the rotating column 26 by lifting or scaffolding equipment, and the position of the rotating column 26 is adjusted according to the overall height of the supporting equipment to ensure that it is in the middle position of the support column 11. Then the staff turns the driving blade plate 27 to drive the rotating column 26 and the horizontal screw rod 24 to rotate, and drives the screw groove 28 to drive the support column 11 to move through the principle of threaded connection, and finally realizes the function of adjusting the distance between the two cross beams 1. The displacement groove 20 can ensure that the main telescopic rod 4 is in a different middle position without affecting the activity adjustment of the two cross beams 1.

[0038] In order to ensure stability after adjustment, a locking structure may be connected to the rotating column 26 to fix the rotating column 26 so as to avoid the stability of the device after adjustment being affected by accidental rotation of the rotating column 26 .

[0039] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

[0040] Other parts of the present invention not described in detail belong to the prior art and will not be described in detail here.

[0041] Finally, it should be noted that 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 they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tunnel construction anti-collapse support device, comprising a crossbeam (1), wherein the crossbeam (1) is provided with two pieces, and is characterized in that: A support column (11) is fixedly connected to each of the four corners of the bottom side walls of the two cross beams (1); a placement base (15) is provided at the bottom of the support column (11); the placement base (15) is a trapezoidal structure; a side wall of the placement base (15) away from the support column (11) is fixedly connected to a non-slip shock-absorbing rubber pad; an adjustment stud (12) is inserted and connected through an internal thread on the side wall opposite to the support column (11) and the placement base (15); and a limit plate (14) is provided on both sides of the adjustment stud (12).

2. The anti-collapse support device for tunnel construction according to claim 1, characterized in that: A rotating groove (16) is provided on the side wall of the top of the placing base (15) and opposite to the adjusting stud (12); a side groove is provided on the inner wall of the rotating groove (16); a rotating disk (13) is fixedly connected to the bottom end of the adjusting stud (12); the rotating disk (13) is a T-shaped structure; the rotating disk (13) is rotatably connected in the rotating groove (16); one end of the two limiting plates (14) is fixedly connected to the top side wall of the placing base (15); one end of the limiting plates (14) away from the placing base (15) is telescopically inserted in the supporting column (11); an arc-shaped diagonal support plate is fixedly connected between the supporting column (11) and the corners of the crossbeam (1).

3. The anti-collapse support device for tunnel construction according to claim 1, characterized in that: Displacement grooves (20) are provided on the top side walls of the two crossbeams (1) near the middle position, and a conical support plate (2) is provided above each displacement groove (20). A receiving cross plate (3) is fixedly connected to the top of the conical support plate (2), and a main telescopic rod (4) is detachably connected to the top side wall of the receiving cross plate (3). An arc-shaped supporting plate (9) is provided above the main telescopic rod (4), and the top end of the main telescopic rod (4) is detachably connected to the middle of the bottom side wall of the arc-shaped supporting plate (9).

4. The anti-collapse support device for tunnel construction according to claim 3, characterized in that: The displacement groove (20) has two side walls opposite to each other, and a follower block (30) is fixedly connected to the middle of the bottom side wall of the conical support plate (2). The follower block (30) is slidably connected to the displacement groove (20). The side walls of the follower block (30) that are away from each other and opposite to the side groove (29) are fixedly connected to a ball (31), and the ball (31) is slidably connected to the side groove (29). The bottom side wall of the follower block (30) away from the conical support plate (2) is evenly rotatably connected with three pairs of balls (31). A rubber layer is fixed to the outer wall of the ball (31), and the ball (31) is in contact with the bottom side wall of the displacement groove (20).

5. The anti-collapse support device for tunnel construction according to claim 1, characterized in that: A slide groove (5) is provided at the top of the cross beam (1) and in the middle of the side walls near both ends, a screw rod (17) is rotatably connected in the slide groove (5), and two side walls of the cross beam (1) that are away from each other are rotatably connected with knobs (19), one end of the knob (19) extends into the slide groove (5) and is detachably connected to one end of the screw rod (17), a slider (6) is slidably connected in the slide groove (5), and the slider (6) is threadedly sleeved on the screw rod (17).

6. The anti-collapse support device for tunnel construction according to claim 5, characterized in that: The top end of the slider (6) is detachably rotatably connected to a wing telescopic rod (7); a side wall of the arc-shaped support plate (9) opposite to the crossbeam (1) and corresponding to the slide groove (5) is provided with an arc-shaped groove (10); a moving block (8) is slidably connected in the arc-shaped groove (10); side walls opposite to each other in the arc-shaped groove (10) are provided with side grooves; and a clamping column (18) is slidably connected in the side groove; the clamping column (18) is fixedly connected to the side walls on both sides of the moving block (8); and the output end of the wing telescopic rod (7) is detachably connected to the bottom side wall of the moving block (8).

7. The anti-collapse support device for tunnel construction according to claim 1, characterized in that: The side walls between the two pairs of support columns (11) are fixedly connected with a load-bearing rear baffle (21), the opposite side walls of the two load-bearing rear baffles (21) are fixedly connected with a diagonal support block (22), the top side walls of the diagonal support block (22) are detachably connected with a follower cross plate (23), the top side walls of the two adjacent ends of the follower cross plates (23) are detachably connected with a fixed suspension rod (25), and the fixed suspension rod (25) is detachably connected to the bottom side wall of the crossbeam (1) through its end away from the follower cross plate (23).

8. The anti-collapse support device for tunnel construction according to claim 7, characterized in that: A screw groove (28) is provided in the middle of the follower transverse plate (23), the screw threads in the two screw grooves (28) are in opposite directions, a transverse screw rod (24) is threadedly connected to the screw groove (28), and the screw threads at both ends of the transverse screw rod (24) are in the same direction as the screw groove (28), a rotating column (26) is fixedly connected to the middle of the transverse screw rod (24), and the outer wall of the rotating column (26) is evenly fixedly connected to a driving fan blade plate (27).

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