Formwork trolley for box culvert pouring and control method

Abstract

The invention belongs to the field of formwork trolleys, and particularly relates to a formwork trolley for box culvert pouring and a control method. Comprising a walking frame, top plates arranged on the top and the two sides of the walking frame, fixed cylinders fixed to the top and the two side surfaces of the walking frame, movable discs movably inserted into inner cavities of the fixed cylinders, and second springs fixed to the ends, close to the walking frame, of the movable discs. The threaded telescopic cylinder is fixed to the end, away from the walking frame, of the movable disc, and the movable cooling mechanism acts on the second spring and is used for preventing the elastic modulus from being affected by too high temperature when the second spring continuously deforms; the air flow acts on the surface of the second spring through the movable cooling mechanism to cool the second spring, so that the situation that the elastic modulus of the second spring is reduced due to temperature rise is prevented, and the use effect of the second spring is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of formwork trolley, in particular to a formwork trolley for box culvert pouring and a control method. BACKGROUND

[0002] The formwork trolley for box culvert pouring is a mobile steel form trolley specially designed for concrete construction of box culvert structure, which has the characteristics of high efficiency, safety and good forming quality. When using the formwork trolley for pouring, the bottom is poured first, and guide rails are set up. The formwork trolley is installed on the guide rails, and is driven to move to the position to be poured. The inner layer formwork is formed at the position to be poured by using the formwork on the formwork trolley, and then the outer layer formwork is fixed to form a pouring space between the inner layer formwork and the outer layer formwork.

[0003] Although the formwork trolley for box culvert pouring in the prior art can adapt to the concrete construction design of box culvert structure of corresponding size, and the corresponding spring telescopic rod is arranged between the walking frame and the top and the support plates on both sides to reduce the vibration of the support plates during use, if the spring telescopic rod continuously deforms and resets, the internal spring will be repeatedly stretched or compressed. External work will be converted into molecular kinetic energy inside the spring material, causing temperature rise. The spring temperature rise easily reduces its elastic modulus, which shows that the deformation recovery speed becomes slow or requires more external force to maintain deformation, thereby affecting its anti-seismic performance, thereby making the use of the device have certain limitations.

[0004] Therefore, the present application provides a formwork trolley for box culvert pouring and a control method. SUMMARY

[0005] In order to make up for the shortcomings of the prior art and solve at least one technical problem raised in the background art.

[0006] The technical solution adopted by the present application to solve its technical problems is: a formwork trolley for box culvert pouring, comprising a walking frame, a top plate arranged on the top and both sides of the walking frame, a fixed cylinder fixed on the top and both sides of the walking frame, an activity disc movably inserted into the inner cavity of the fixed cylinder, a second spring fixed to one end of the activity disc close to the walking frame, a threaded telescopic cylinder fixed to the other end of the activity disc away from the walking frame, and an activity cooling mechanism acting on the second spring, for preventing the temperature of the second spring from being too high to affect the elastic modulus when the second spring continuously deforms. The second spring is fixed to the inner wall of the fixed cylinder near one end of the walking frame, and the movable cooling mechanism comprises a rotating pipe penetratingly inserted into the middle position of the movable disc, a piston rod slidingly inserted into the inner cavity of the rotating pipe, air inlet holes opened on the two side surfaces of the rotating pipe and communicated with the top of the inner cavity of the rotating pipe, and the rotating pipe is rotationally connected to the inner wall of the fixed cylinder and the walking frame.

[0007] Preferably, the driving assembly comprises a bracket fixed to the middle position of the inner cavity of the walking frame, a rotating disc rotationally connected to the middle position of the bracket, a first motor fixed to one side of the bracket, a circular gear fixedly sleeved on the output end of the first motor, and a gear ring fixedly sleeved on the outer circumferential surface of the rotating disc, and the circular gear and the gear ring are in meshing connection.

[0008] Preferably, the driving assembly further comprises a contact rod fixed to the two end surfaces of the rotating disc, a sleeve frame sleeved on the outer circumferential surface of the contact rod, a first moving frame fixed to the two sides of the sleeve frame, and a second moving frame fixed to the top of the sleeve frame, the first moving frame is fixed to the surface of the piston rod extending to the middle position of the walking frame at the adjacent position, and the second moving frame is fixed to the surface of the piston rod extending to the middle position of the walking frame at the adjacent position.

[0009] Preferably, the movable cooling mechanism further comprises a rotating assembly, the rotating assembly comprises a second motor fixed to the top of the walking frame on one side of the fixed cylinder, movable shafts rotationally connected to the top of the inner cavity surface of the walking frame on both sides, rotating shafts rotationally connected to the bottom of the movable shafts, movable rods rotationally connected to the inner cavity of the walking frame on both sides, two connecting rods rotationally connected to the middle position of the top of the inner cavity of the walking frame, and the rotating pipe fixedly sleeved on the outer circumferential surface of the horizontally arranged rotating pipe extending to the position of the inner cavity of the walking frame.

[0010] Preferably, the rotating assembly further comprises first bevel gears on the outer circumferential surfaces of the movable shafts and the connecting rods, a second motor output end fixedly sleeved on the outer circumferential surface of the vertically arranged rotating pipe extending to the position of the inner cavity of the walking frame, second bevel gears on the two ends of the outer circumferential surfaces of the rotating shafts and the movable rods, the second bevel gears are in meshing connection with the first bevel gears at the adjacent positions, and the output end of the second motor is in rotational connection with the inner wall of the walking frame.

[0011] Preferably, it further comprises a distance adjusting mechanism acting on the top plate, the distance adjusting mechanism comprises rod grooves opened on both ends of the top of the walking frame, a first threaded rod rotationally connected to the inner cavity of the rod groove, first threaded sleeves threadedly connected to the outer circumferential surfaces of the first threaded rod on both sides, and a support rod hingedly connected to the top of the first threaded sleeve, and the top of the support rod is hingedly connected to the surface of the bottom of one of the top plates.

[0012] Preferably, the distance adjusting mechanism further comprises a second threaded rod rotatably connected to the inner cavity of the walking frame at both ends, a second threaded sleeve threadedly connected to the outer circumferential surface of the second threaded rod at both sides, and a movable plate fixed to the second threaded sleeve at both ends in a U-shaped manner, the movable plate being slidably and insertingly connected to the inner wall of the walking frame at both sides, and one side of the movable plate penetrating the walking frame and being fixed to the surface of the adjacent top plate.

[0013] Preferably, the method further comprises a rotation providing assembly acting on the first threaded rod and the second threaded rod, the rotation providing assembly comprising a controller fixed to the walking frame at an intermediate position at one end, a pressure sensor movably inserted into the inner cavity of the surface of the top plate, a first spring fixed between the surface of the pressure sensor and the inner cavity surface of the top plate, a third motor fixed to one side of the walking frame, a rotating cylinder rotatably connected to one side of the walking frame close to the third motor, a rotating rod rotatably connected to one side of the walking frame at both upper and lower ends of the rotating cylinder, a connecting component acting on the rotating rod, a pulley fixedly sleeved to the position where the first threaded rod and the second threaded rod extend out of the inner cavity of the walking frame, a connecting belt sleeved between two adjacent pulleys, a third bevel gear fixedly sleeved to the output end of the third motor, the outer circumferential surface of the rotating cylinder and the rotating rod, and the outer circumferential surface of one of the first threaded rod and the second threaded rod at the position of one end of the pulley, the two adjacent third bevel gears being meshingly connected, and the pressure sensor and the third motor being electrically connected to the controller.

[0014] Preferably, the connecting component comprises a slot formed at one end of the rotating rod close to the rotating cylinder, a plug column movably inserted into the inner cavity of the rotating cylinder, a third threaded sleeve fixed to one side of the plug column, and a third threaded rod threadedly penetrating the intermediate position of the third threaded sleeve, both ends of the third threaded rod being rotatably connected to the surface of the rotating cylinder, and the third threaded sleeve being slidably connected to the inner cavity of the rotating cylinder.

[0015] A control method of a formwork trolley for box culvert pouring, the method using the formwork trolley for box culvert pouring described above, comprising the following steps: S1: moving the walking frame to the position to be constructed, connecting the rotating cylinder to the rotating rod located at the top thereof through the connecting component, driving the third motor to rotate through the controller, rotating the two first threaded rods to change the height of the top plate at the top of the walking frame, until the top plate abuts against the top of the inner wall of the box culvert, and closing the third motor under the action of the pressure sensor; S2: the rotating cylinder is connected with the rotating rod at the bottom thereof through the connecting component, and the third motor is driven to rotate through the controller, so that the two second threaded rods rotate to make the top plates on both sides of the walking frame move in the horizontal direction until the top plates abut against the two sides of the inner wall of the box culvert, and the third motor is turned off under the action of the pressure sensor; S3: after the spacing between the top plates and the walking frame is adjusted, the length of the threaded telescopic cylinder is adjusted by rotating the threaded telescopic cylinder, and the end of the threaded telescopic cylinder close to the adjacent top plate can be extended into the screw hole close to the surface of the top plate, so that the top plate can be connected with the adjacent movable disc; S4: the piston rod reciprocates in the inner cavity of the rotating pipe by starting the first motor, so that the air outlet can discharge the airflow to cool the second spring, and the rotating pipe is rotated by starting the second motor to make the airflow fully act on the second spring to improve the cooling effect.

[0016] The beneficial effects of the present application are as follows: 1. The present application can cool the surface of the second spring by the movable cooling mechanism, so as to prevent the decrease of the elastic modulus of the second spring due to the temperature rise, thereby ensuring the use effect of the second spring.

[0017] 2. The present application can control the independent rotation of the two first threaded rods and the second threaded rod through the spacing adjusting mechanism, and can stop the rotation when the top plate abuts against the top and both sides of the box culvert, thereby preventing the damage of the top plate caused by excessive abutment against the inner wall of the box culvert, thereby improving the applicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below with reference to the accompanying drawings.

[0019] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the partial structure of the present application in the side view; Figure 3 is a schematic diagram of the structure of the present application in the Figure 2 enlarged view of the structure at A in the present application; Figure 4 is a schematic diagram of the structure of the present application in the rotating rod and the rotating cylinder; Figure 5 is a schematic diagram of the partial structure of the present application in the top plate; Figure 6 is a schematic diagram of the partial structure of the present application in the walking frame; Figure 7 is a schematic diagram of the structure of the present application in the Figure 6 enlarged view of the structure at B in the present application; Figure 8 This is a three-dimensional structural diagram of the bracket in this invention; Figure 9 This is a schematic cross-sectional view of the fixed cylinder in this invention; Figure 10 This is a flowchart illustrating the control method in this invention.

[0020] In the diagram: 1. Walking frame; 2. Top plate; 3. Controller; 4. Rod groove; 5. First threaded rod; 6. First threaded sleeve; 7. Support rod; 8. Second threaded rod; 9. Second threaded sleeve; 10. Movable plate; 11. Pressure sensor; 12. First spring; 13. Fixed cylinder; 14. Movable disc; 15. Threaded telescopic cylinder; 16. Rotating tube; 17. Air inlet; 18. Air outlet; 19. Second spring; 20. Piston rod; 21. Bracket; 22. Rotating disc; 23. Sleeve frame; 24. Abutment rod 25. First motor; 26. Circular gear; 27. Gear ring; 28. First moving frame; 29. ​​Second moving frame; 30. Second motor; 31. Movable shaft; 32. Connecting rod; 33. Rotating shaft; 34. Movable rod; 35. First bevel gear; 36. Second bevel gear; 37. Third motor; 38. Rotating cylinder; 39. Rotating rod; 40. Third bevel gear; 41. Pulley; 42. Connecting belt; 43. Slot; 44. Insert post; 45. Third threaded sleeve; 46. Third threaded rod. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments. Example 1

[0022] like Figures 1 to 9 As shown, an embodiment of the present invention provides a template trolley for box culvert casting, comprising a traveling frame 1, a top plate 2 disposed on the top and sides of the traveling frame 1, a fixed cylinder 13 fixed to the top and sides of the traveling frame 1, a movable disc 14 movably inserted into the inner cavity of the fixed cylinder 13, a second spring 19 fixed to one end of the movable disc 14 near the traveling frame 1, a threaded telescopic cylinder 15 fixed to one end of the movable disc 14 away from the traveling frame 1, and a movable cooling mechanism acting on the second spring 19 to prevent its temperature from being too high and affecting its elastic modulus when the second spring 19 is continuously deformed. The second spring 19 is fixed at one end near the traveling frame 1 and at the other end of the inner wall of the fixed cylinder 13 near the traveling frame 1. The movable cooling mechanism includes a rotating tube 16 inserted through the middle of the movable plate 14, a piston rod 20 slidably inserted into the inner cavity of the rotating tube 16, and an air inlet 17 with an L-shape opened on both sides of the rotating tube 16 and connected to the top of the inner cavity of the rotating tube 16. The rotating tube 16 and the fixed cylinder 13 are rotatably connected to the inner wall of the traveling frame 1.

[0023] When the device is used in the box culvert structure, the top plate 2 will bear the load during the concrete pouring process. When the vibration occurs due to the external stress during the bearing process, the movable disc 14 will compress the second spring 19 to deform under the connecting action of the threaded telescopic cylinder 15, so that the vibration force is weakened under the elastic force of the second spring 19. The inside of the air inlet hole 17 and the air outlet 18 is provided with a one-way valve, so that the air outlet 18 can only be out of the inner cavity of the rotating pipe 16, and the air inlet hole 17 can only be inhaled by the outside to the inside of the air inlet hole 17. When the piston rod 20 moves towards the top plate 2, air can be discharged from the air outlet 18, and the airflow acting on the surface of the second spring 19 can cool it, thereby preventing the second spring 19 from reducing its elastic modulus due to temperature rise, thereby ensuring the use effect of the second spring 19. When the piston rod 20 moves towards the walking vehicle frame 1, the air pressure changes so that the outside air enters the inner cavity of the rotating pipe 16 through the air inlet hole 17.

[0024] As shown in Figures 1 to 9 , the movable cooling mechanism further comprises a driving assembly, the driving assembly comprises a support 21 fixed in the middle position of the inner cavity of the walking vehicle frame 1, a rotating disc 22 rotatably connected to the middle position of the support 21, a first motor 25 fixed to one side of the support 21, a circular gear 26 fixedly sleeved on the output end of the first motor 25, and a gear ring 27 fixedly sleeved on the outer circumferential surface of the rotating disc 22. The circular gear 26 and the gear ring 27 are in meshing connection. By starting the first motor 25, the circular gear 26 rotates, so that the rotating disc 22 can be in a rotating state under the meshing action between the circular gear 26 and the gear ring 27.

[0025] As shown in Figures 1 to 9 , the driving assembly further comprises a contact rod 24 fixed to the surfaces at both ends of the rotating disc 22, a sleeve frame 23 sleeved on the outer circumferential surface of the contact rod 24, a first moving frame 28 fixed to both sides of the sleeve frame 23, and a second moving frame 29 fixed to the top of the sleeve frame 23. The first moving frame 28 is fixed to the surface of the piston rod 20 adjacent to the position extending to the middle position of the walking vehicle frame 1, and the second moving frame 29 is fixed to the surface of the piston rod 20 adjacent to the position extending to the middle position of the walking vehicle frame 1. When the rotating disc 22 rotates, it can drive the two abutting rods 24 to move in a circle. Since two groups of piston rods 20 are limited by the adjacent rotating tube 16 to move only in the horizontal direction, one of the sleeve frames 23 and the first moving frame 28 can only move in the horizontal direction. Under the action of one of the abutting rods 24 abutting the inner cavity of the sleeve frame 23 connected to the first moving frame 28, the sleeve frame 23 can drive the first moving frame 28 to move in the horizontal direction, thereby driving the adjacent piston rod 20 to move in the horizontal direction. Since the other group of piston rods 20 is limited by the adjacent rotating tube 16 to move only in the vertical direction, the other sleeve frame 23 can only move in the active direction under the connecting action of the adjacent second moving frame 29. Under the action of the other abutting rod 24 abutting the sleeve frame 23 connected to the second moving frame 29 moving in the vertical direction, the second moving frame 29 and the adjacent piston rod 20 move in the vertical direction.

[0026] As shown in Figures 1 to 9 The movable cooling mechanism further includes a rotating assembly, which includes a second motor 30 fixed to the top of the walking vehicle frame 1 on one side of the fixed cylinder 13, a movable shaft 31 rotatably connected to the top of the inner cavity of the walking vehicle frame 1 on both sides, a rotating shaft 33 rotatably connected to the bottom of the movable shaft 31, a movable rod 34 rotatably connected to the inner cavity of the walking vehicle frame 1 on both sides, two connecting rods 32 rotatably connected to the top middle position of the inner cavity of the walking vehicle frame 1, a first bevel gear 35 fixedly sleeved on the outer circumferential surface of the horizontally arranged rotating tube 16 extending to the position of the inner cavity of the walking vehicle frame 1, the outer circumferential surface of the movable shaft 31 and the connecting rod 32 on both sides, a second bevel gear 36 fixedly sleeved on the outer circumferential surface of the vertically arranged rotating tube 16 extending to the position of the inner cavity of the walking vehicle frame 1, the output end of the second motor 30, the rotating shaft 33 and the outer circumferential surface of the movable rod 34 on both ends, the second bevel gear 36 and the first bevel gear 35 in the adjacent position are in meshing connection, and the output end of the second motor 30 is rotatably connected to the inner wall of the walking vehicle frame 1. When the second motor 30 is started, the meshing action between one of the second bevel gears 36 and the adjacent first bevel gears 35 causes one of the movable shafts 31 to rotate, which in turn causes one of the vertically arranged rotating tubes 16 to rotate under the meshing action of the two first bevel gears 35 and the second bevel gears 36 on the other side of the movable shaft 31. The meshing action of the first bevel gears 35 on both sides of the connecting rods 32 at the top middle position of the inner cavity of the walking vehicle frame 1 and the adjacent second bevel gears 36 causes the other two vertically arranged rotating tubes 16 to rotate, and the meshing action between the second bevel gears 36 on the outer circumferential surface of the vertically arranged rotating tube 16 away from the second motor 30 and the adjacent first bevel gears 35 causes the other movable shaft 31 to rotate. When the two movable shafts 31 rotate to drive the adjacent first bevel gears 35 to rotate, the rotation shafts 33 can rotate under the meshing action between the second bevel gears 36 on the surface of the adjacent rotation shafts 33 and the first bevel gears 35 on the surface of the adjacent rotation tubes 16, so that the rotation tubes 16 at the bottom of the two rotation shafts 33 can rotate under the meshing action between the first bevel gears 35 on the outer circumferential surface of the movable rods 34 and the adjacent second bevel gears 36 close to the first bevel gears 35, so that the movable rods 34 can rotate to drive the remaining rotation tubes 16 to rotate, thereby causing the plurality of rotation tubes 16 to rotate, so that the air outlet 18 can make a circular motion, so that the airflow discharged at the air outlet 18 can fully act on the adjacent second springs 19, improving the cooling effect of the second springs 19. Example Two

[0027] As Figures 1 to 9 shown, the comparative example one, wherein another embodiment of the present application is: Further comprising a distance adjusting mechanism acting on the top plate 2, the distance adjusting mechanism comprising a rod groove 4 opened at both ends of the top of the walking frame 1, a first threaded rod 5 rotationally connected to the inner cavity of the rod groove 4, a first threaded sleeve 6 threadedly connected to the outer circumferential surface of the first threaded rod 5 on both sides, and a support rod 7 hingedly connected to the top of the first threaded sleeve 6, the top of the support rod 7 is hingedly connected to the surface of the bottom of one of the top plates 2; Since the external thread structures on both sides of the outer circumferential surface of the first threaded rod 5 are oppositely arranged, and the rod groove 4 can resist and limit the first threaded sleeve 6, when the first threaded rod 5 rotates, the two adjacent first threaded sleeves 6 can move towards each other or away from each other under the cooperation of the threaded structures between the first threaded sleeve 6 and the first threaded rod 5, so that the height of one of the top plates 2 can be changed to adapt to the box culvert under different heights.

[0028] As Figures 1 to 9 shown, the distance adjusting mechanism further comprises a second threaded rod 8 rotationally connected to the inner cavity of the walking frame 1 at both ends, a second threaded sleeve 9 threadedly connected to the outer circumferential surface of the second threaded rod 8 on both sides, and a movable plate 10 fixed to the second threaded sleeve 9 at both ends in a U-shaped arrangement, the movable plate 10 is slidably and insertingly connected to the inner wall of the walking frame 1 on both sides, one side of the movable plate 10 passes through the walking frame 1 and is fixed to the surface of the adjacent top plate 2; Due to the outer thread structure on both sides of the outer circumferential surface of the second threaded rod 8 is reversely arranged, and the movable plate 10 is resisted by the inner wall of the walking frame 1, so that it can only move in the horizontal direction, thereby limiting the second threaded sleeve 9, so that when the two second threaded rods 8 rotate synchronously, the two adjacent second threaded sleeves 9 can move away from or close to each other under the cooperation of the threaded structure between the second threaded sleeve 9 and the second threaded rod 8, thereby adjusting the distance between the other two top plates 2 and the walking frame 1, to adapt to different width sizes of box culverts; The top plate 2 is provided with a plurality of screw holes matched with the threaded telescopic cylinder 15 on the surface of one end close to the walking frame 1. When the distance between the top plate 2 and the walking frame 1 is adjusted, the length of the threaded telescopic cylinder 15 is adjusted by rotating it, and the end of the threaded telescopic cylinder 15 close to the adjacent top plate 2 can extend into the screw hole close to the surface of the top plate 2, so that the top plate 2 can be connected with the adjacent movable disc 14, and the top plate 2 can be acted on by the second spring 19.

[0029] As shown in Figures 1 to 9 The supply rotation assembly acting on the first threaded rod 5 and the second threaded rod 8 includes a controller 3 fixed to the middle position of one end of the walking frame 1, a pressure sensor 11 movably inserted into the inner cavity of the surface of the top plate 2, a first spring 12 fixed between the surface of the pressure sensor 11 and the inner cavity of the top plate 2, a third motor 37 fixed to one side of the walking frame 1, a rotating cylinder 38 rotatably connected to one side of the walking frame 1 close to the third motor 37, a rotating rod 39 rotatably connected to one side of the walking frame 1 located at the upper and lower ends of the rotating cylinder 38, a connecting part acting on the rotating rod 39, a belt pulley 41 fixedly sleeved on the position where the first threaded rod 5 and the second threaded rod 8 extend out of the inner cavity of the walking frame 1, a connecting belt 42 sleeved between two adjacent belt pulleys 41, a third bevel gear 40 fixedly sleeved on the outer circumferential surface of the output end of the third motor 37, the rotating cylinder 38 and the rotating rod 39, one of the outer circumferential surfaces of the first threaded rod 5 and the second threaded rod 8 is located at one end of the belt pulley 41, and the two adjacent third bevel gears 40 are meshingly connected. The pressure sensor 11 and the third motor 37 are electrically connected to the controller 3; The third motor 37 can be controlled by the controller 3 to rotate, thereby rotating the rotating cylinder 38 under the meshing action between two adjacent third bevel gears 40, and the rotating cylinder 38 can drive one of the rotating rods 39 to rotate through the connecting component, thereby driving one of the first threaded rods 5 and the second threaded rods 8 to rotate, respectively. When one of the first threaded rods 5 and the second threaded rods 8 rotates, the other first threaded rods 5 and second threaded rods 8 can be driven to rotate under the connecting action of the pulleys 41 and the connecting belts 42, so that the distance between the top plate 2 on the top of the traveling frame 1 or the top plates 2 on both sides and the traveling frame 1 can be changed. When the top plate 2 abuts against the inner wall of the box culvert, the pressure sensor 11 can be pressed and abut against the first spring 12 to deform, so that the pressure sensor 11 is completely embedded in the inner cavity of the top plate 2, and the top plate 2 can transmit an electrical signal to the controller 3, so that the controller 3 turns off the third motor 37, thereby stopping the top plate 2 from abutting against the inner wall of the box culvert to prevent damage to the top plate 2. It should be noted that the pressure sensor 11 can be a piezoresistive pressure sensor with a model number of MPX5700AP. The piezoresistive pressure sensor converts pressure into resistance change through a piezoresistive effect, and then outputs an electrical signal to the control panel 4 through a Wheatstone bridge. This technology has been widely used in industrial control, and will not be described here.

[0030] As shown in Figures 1 to 9 , the connecting component includes a slot 43 formed in one end of the rotating rod 39 close to the rotating cylinder 38, a plug column 44 movably inserted into the inner cavity of the rotating cylinder 38, a third threaded sleeve 45 fixed to one side of the plug column 44, and a third threaded rod 46 penetratingly connected to the middle position of the third threaded sleeve 45. The two ends of the third threaded rod 46 are rotationally connected to the surface of the rotating cylinder 38, and the third threaded sleeve 45 is slidingly connected to the inner cavity of the rotating cylinder 38. Due to the connection of the third threaded sleeve 45 and the abutting limiting action of the inner wall of the rotating cylinder 38 on the plug column 44, the plug column 44 can only slide in the vertical direction, so that when the third threaded rod 46 is rotated, the third threaded sleeve 45 can drive the plug column 44 to move in the vertical direction under the cooperation of the threaded structure between the third threaded rod 46 and the third threaded sleeve 45, thereby enabling the plug column 44 to be embedded in one of the slots 43, so that when the rotating cylinder 38 rotates, the plug column 44 can control one of the rotating rods 39 to rotate under the abutting action of the plug column 44 and the inner wall of the slot 43, thereby enabling the two first threaded rods 5 and the second threaded rods 8 to rotate independently, facilitating the user to abut the top plate 2 against the top and both sides of the box culvert.

[0031] As shown in Figure 10 , a control method of a formwork trolley for box culvert pouring is provided, which adopts the formwork trolley for box culvert pouring described above, and includes the following steps: S1: the walking frame 1 is moved to the position to be constructed, the rotating cylinder 38 is connected with the rotating rod 39 at the top thereof through the connecting component, the third motor 37 is driven to rotate through the controller 3, the two first threaded rods 5 are rotated to change the height of the top plate 2 at the top of the walking frame 1, until the top plate 2 touches the top of the inner wall of the box culvert, and the third motor 37 is closed under the action of the pressure sensor 11; S2: the rotating cylinder 38 is connected with the rotating rod 39 at the bottom thereof through the connecting component, the third motor 37 is driven to rotate through the controller 3, the two second threaded rods 8 are rotated to make the top plates 2 on both sides of the walking frame 1 move in the horizontal direction, until the top plates 2 touch the two sides of the inner wall of the box culvert, and the third motor 37 is closed under the action of the pressure sensor 11; S3: after the spacing between the top plate 2 and the walking frame 1 is adjusted, the length of the threaded telescopic cylinder 15 is adjusted, and the end of the threaded telescopic cylinder 15 close to the adjacent top plate 2 can be extended into the screw hole close to the surface of the top plate 2, so that the top plate 2 can be connected with the adjacent movable disc 14; S4: the piston rod 20 reciprocates in the inner cavity of the rotating pipe 16 by starting the first motor 25, so that the air outlet 18 can discharge the airflow to cool the second spring 19, and the rotating pipe 16 is rotated by starting the second motor 30, so that the airflow can fully act on the second spring 19 to improve the cooling effect.

[0032] The above front, rear, left, right, up and down are based on the drawings in the specification Figure 1 As the standard of the human observation angle, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and the like.

[0033] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A formwork trolley for box culvert casting, comprising a traveling frame (1) and top plates (2) disposed on the top and sides of the traveling frame (1), characterized in that: It also includes a fixed cylinder (13) fixed to the top and side surfaces of the traveling frame (1), a movable disc (14) movably inserted into the inner cavity of the fixed cylinder (13), a second spring (19) fixed to one end of the movable disc (14) near the traveling frame (1), a threaded telescopic cylinder (15) fixed to one end of the movable disc (14) away from the traveling frame (1), and a movable cooling mechanism acting on the second spring (19) to prevent the temperature of the second spring (19) from being too high and affecting the elastic modulus when the second spring (19) continues to deform. The second spring (19) is fixed at one end near the walking frame (1) and at the other end of the inner wall of the fixed cylinder (13) near the walking frame (1). The movable cooling mechanism includes a rotating tube (16) inserted through the middle of the movable disc (14), a piston rod (20) slidably inserted into the inner cavity of the rotating tube (16), and air inlets (17) formed in an L-shape and opened on both sides of the rotating tube (16) and connected to the top of the inner cavity of the rotating tube (16). The rotating tube (16) and the fixed cylinder (13) are rotatably connected to the inner wall of the walking frame (1).

2. The formwork trolley for box culvert casting according to claim 1, characterized in that: The active cooling mechanism also includes a drive assembly, which includes a bracket (21) fixed at the middle position of the inner cavity of the walking frame (1), a rotating disk (22) rotatably connected to the middle position of the bracket (21), a first motor (25) fixed to one side of the bracket (21), a spur gear (26) fixedly sleeved on the output end of the first motor (25), and a gear ring (27) fixedly sleeved on the outer circumferential surface of the rotating disk (22). The spur gear (26) and the gear ring (27) are meshed together.

3. A formwork trolley for box culvert casting according to claim 2, characterized in that: The drive assembly also includes abutment rods (24) fixed to both ends of the rotating disk (22), a sleeve frame (23) sleeved on the outer periphery of the abutment rods (24), a first movable frame (28) fixed to both sides of the sleeve frame (23), and a second movable frame (29) fixed to the top of the sleeve frame (23). The first movable frame (28) is fixed to the surface of the piston rod (20) at one side extending to the middle position of the traveling frame (1), and the second movable frame (29) is fixed to the surface of the piston rod (20) at one end extending to the middle position of the traveling frame (1).

4. A formwork trolley for box culvert casting according to claim 3, characterized in that: The active cooling mechanism also includes a rotating component, which includes a second motor (30) fixed to the top of the walking frame (1) on one side of the fixed cylinder (13), a movable shaft (31) rotatably connected to both sides of the top of the inner cavity of the walking frame (1), a rotating shaft (33) rotatably connected to the bottom of the movable shaft (31), a movable rod (34) rotatably connected to both sides of the inner cavity of the walking frame (1), two connecting rods (32) rotatably connected to the middle position of the top of the inner cavity of the walking frame (1), and a fixed sleeve on the outer circumference of the horizontally set rotating tube (16) extending to the inner cavity of the walking frame (1).

5. A formwork trolley and control method for box culvert casting according to claim 4, characterized in that: The rotating assembly also includes a first bevel gear (35) on both sides of the outer peripheral surface of the movable shaft (31) and the connecting rod (32), a fixed sleeve on the outer peripheral surface of the vertically arranged rotating tube (16) extending to the inner cavity of the walking frame (1), the output end of the second motor (30), and the second bevel gear (36) at both ends of the outer peripheral surface of the rotating shaft (33) and the movable rod (34). The second bevel gear (36) is meshed with the first bevel gear (35) at the adjacent position, and the output end of the second motor (30) is rotatably connected to the inner wall of the walking frame (1).

6. A formwork trolley for box culvert casting according to claim 5, characterized in that: It also includes an adjustment mechanism acting on the top plate (2), the adjustment mechanism including rod grooves (4) opened at both ends of the top of the traveling frame (1), a first threaded rod (5) rotatably connected to the inner cavity of the rod groove (4), a first threaded sleeve (6) threadedly connected to both sides of the outer peripheral surface of the first threaded rod (5), and a support rod (7) hinged to the top of the first threaded sleeve (6), the top of the support rod (7) being hinged to the bottom surface of one of the top plates (2).

7. A formwork trolley for box culvert casting according to claim 6, characterized in that: The adjustment mechanism further includes a second threaded rod (8) rotatably connected to both ends of the inner cavity of the traveling frame (1), a second threaded sleeve (9) threadedly connected to both sides of the outer circumferential surface of the second threaded rod (8), and a movable plate (10) fixed at both ends of the second threaded sleeve (9) in a U-shape. The movable plate (10) is slidably inserted into both sides of the inner wall of the traveling frame (1). One side of the movable plate (10) passes through the traveling frame (1) and is fixed to the surface of the adjacent top plate (2).

8. A formwork trolley for box culvert casting according to claim 7, characterized in that: It also includes a screw-feeding assembly acting on the first threaded rod (5) and the second threaded rod (8). The screw-feeding assembly includes a controller (3) fixed at the middle position of one end of the traveling frame (1), a pressure sensor (11) movably inserted into the inner cavity of the surface of the top plate (2), a first spring (12) fixed between the surface of the pressure sensor (11) and the inner cavity surface of the top plate (2), a third motor (37) fixed on one side of the traveling frame (1), a rotating cylinder (38) rotatably connected to one side of the traveling frame (1) near the position of the third motor (37), a rotating rod (39) rotatably connected to one side of the traveling frame (1) at the upper and lower ends of the rotating cylinder (38), and a screw-feeding assembly acting on the rotating cylinder (8). The rod (39) has a connecting component, a pulley (41) fixedly sleeved on the first threaded rod (5) and the second threaded rod (8) extending out of the inner cavity of the vehicle frame (1), a connecting belt (42) sleeved between two adjacent pulleys (41), a fixed sleeved on the output end of the third motor (37), the outer circumference of the rotating cylinder (38) and the rotating rod (39), and a third bevel gear (40) on one of the outer circumferences of the first threaded rod (5) and the second threaded rod (8) located at one end of the pulley (41). The two adjacent third bevel gears (40) are meshed together. The pressure sensor (11) and the third motor (37) are electrically connected to the controller (3).

9. A formwork trolley for box culvert casting according to claim 8, characterized in that: The connecting component includes a slot (43) opened at one end of the rotating rod (39) near the rotating cylinder (38), a post (44) movably inserted into the inner cavity of the rotating cylinder (38), a third threaded sleeve (45) fixed to one side of the post (44), and a third threaded rod (46) threaded through and connected to the middle position of the third threaded sleeve (45). The two ends of the third threaded rod (46) are rotatably connected to the surface of the rotating cylinder (38), and the third threaded sleeve (45) is slidably connected to the inner cavity of the rotating cylinder (38).

10. A control method for a formwork trolley used in box culvert casting, the method employing the formwork trolley for box culvert casting as described in claim 9, comprising the following steps: S1: Move the traveling frame (1) to the construction position, connect the rotating cylinder (38) to the rotating rod (39) at its top through the connecting component, and drive the third motor (37) to rotate through the controller (3), so that the two first threaded rods (5) rotate and the height of the top plate (2) at the top of the traveling frame (1) changes until it touches the top of the inner wall of the box culvert, and the third motor (37) is turned off under the action of the pressure sensor (11); S2: The rotating cylinder (38) is connected to the rotating rod (39) at its bottom by the connecting component, and the third motor (37) is driven to rotate by the controller (3), so that the two second threaded rods (8) rotate and the top plates (2) on both sides of the traveling frame (1) move horizontally until they touch the sides of the inner wall of the box culvert, and the third motor (37) is turned off under the action of the pressure sensor (11). S3: After the distance between the top plate (2) and the traveling frame (1) is adjusted, the length of the threaded telescopic cylinder (15) is adjusted by rotating it, so that the end of the threaded telescopic cylinder (15) near the adjacent top plate (2) can extend into the screw hole near the surface of the top plate (2), so that the top plate (2) can be connected to the adjacent movable plate (14). S4: By starting the first motor (25), the piston rod (20) reciprocates in the inner cavity of the rotating tube (16), so that the air outlet (18) can discharge air to cool the second spring (19). By starting the second motor (30), the rotating tube (16) can rotate so that the air can fully act on the second spring (19) to improve the cooling effect.

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