A rapid positioning device and method for a steel formwork of a ballastless track

Abstract

The present application relates to the field of rail transit, and discloses a rapid positioning device and method for a steel formwork of a ballastless track. The rapid positioning device for the steel formwork of the ballastless track comprises a base, a main frame body and a formwork contact mechanism. The main frame body is slidably arranged on the base. The formwork contact mechanism comprises a support frame body, two lateral sliding bodies, a longitudinal spacing adjustment assembly, a lateral spacing adjustment assembly and an inclination adjustment assembly. The compact design of the main frame body, the base and the formwork contact mechanism reduces the volume of the positioning device to adapt to narrow construction spaces such as tunnels and bridge guardrails. Meanwhile, the positioning device integrates the functions of synchronous high-precision adjustment of lateral spacing, longitudinal spacing and inclination angle, overcomes the installation limitations and positioning deviation defects caused by the single adjustment function of the prior art due to the large structure, and realizes rapid, accurate and stable positioning of the steel formwork under complex working conditions.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, and more specifically, to a rapid positioning device and method for ballastless track steel formwork. Background Technology

[0002] Ballastless track is a modern railway track structure whose core feature is the replacement of the traditional crushed stone ballast layer with a reinforced concrete monolithic track bed. It firmly fixes the rails, fasteners, and sleepers (or precast track slabs) to a cast-in-place or precast concrete (or asphalt concrete) foundation, forming a continuous, stable, and high-precision rigid track structure. This design greatly improves the track's smoothness, stability, and durability, significantly reducing subsequent maintenance workload. It is particularly suitable for high-speed railways, urban rail transit, and other line types with extremely high requirements for track geometry, and is one of the key technologies for achieving high-speed, smooth, and safe train operation.

[0003] In the process of ballastless track casting, multiple steel formworks need to be installed at the casting positions according to a preset method to form a specific casting mold before concrete pouring. Existing technologies, such as the positioning device disclosed in CN116837674A, use a ray adjustment unit, a formwork docking device, and a support device to position the steel formwork. However, this device has a large overall structure, making it difficult to install and operate in narrow spaces such as viaducts or tunnels, thus limiting its applicability. While CN119243533A features a compact mounting structure to adapt to narrow spaces, its adjustment function is limited, failing to achieve multi-directional precise adjustment of the steel formwork (such as lateral / longitudinal spacing and tilt adjustment), resulting in insufficient positioning accuracy. Therefore, there is an urgent need for a ballastless track steel formwork positioning device that can adapt to narrow construction spaces and achieve multi-dimensional precise adjustment, to solve the technical problem of the inability to simultaneously achieve spatial adaptability and adjustment accuracy in existing technologies. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid positioning device and method for ballastless track steel formwork to solve the aforementioned technical problems.

[0005] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0006] This invention provides a rapid positioning device for ballastless track steel formwork, comprising:

[0007] Base, main frame, and template contact mechanism;

[0008] The main frame is slidably mounted on the base;

[0009] The template contact mechanism includes: a support frame, two transverse sliding bodies, a longitudinal spacing adjustment component, a transverse spacing adjustment component, and an inclination adjustment component;

[0010] The support frame is rotatably mounted on one side of the main frame, and the two transverse sliding bodies slide symmetrically on the support frame. Each transverse sliding body is provided with two contact bodies that are symmetrically distributed vertically.

[0011] The longitudinal spacing adjustment assembly includes a drive unit on the main frame and two transmission units that are connected to the drive unit. The two transmission units are respectively located on the transverse sliding body and are connected to two contact bodies at corresponding positions. Driven by the drive unit, the two transmission units adjust the spacing between the two contact bodies by the same displacement adjustment amount.

[0012] The lateral spacing adjustment component is mounted on the support frame and is used to adjust the spacing between the two lateral sliding bodies;

[0013] The tilt adjustment component is located on the support frame and is used to adjust the tilt angle of the support frame.

[0014] Preferably, the contact body includes an L-shaped contact plate and a connecting plate detachably connected to the contact plate, the two right-angled sides of the contact plate are provided with protective pads, and the end of the connecting plate slides with the transverse sliding body.

[0015] Preferably, the transmission part is a first lead screw rotatably mounted on a transverse sliding body, the threads at the upper and lower ends of the first lead screw are in opposite directions, and the corresponding two contact bodies are threadedly connected to the upper and lower ends of the first lead screw.

[0016] Preferably, the drive unit includes a movable seat slidably disposed on the support frame, a driving pulley rotating on the movable seat, and two driven pulleys fixed to the first lead screw. The driving pulley is connected to the two driven pulleys through a transmission belt, and a return spring is connected between the movable seat and the support frame.

[0017] Preferably, the movable seat has an adjustment handle that rotates, a drive gear is fixed on the adjustment handle, and a driven gear that meshes with the drive gear is fixed on the drive pulley. The diameter of the driven gear is larger than the diameter of the drive gear.

[0018] Preferably, the tilt adjustment assembly includes a rotating rod that rotates on the main frame, a worm gear fixed on the rotating rod, a worm meshing with the worm gear, and a level fixed on the rotating rod, wherein the end of the rotating rod is fixed to the rotating end of the support frame.

[0019] Preferably, the lateral spacing adjustment assembly includes a second lead screw with double reverse threads, two lateral sliding bodies respectively threaded to both ends of the second lead screw, and adjustment knobs are provided at both ends of the second lead screw.

[0020] Preferably, the protective pad is a rubber pad with serrated surface, and the connecting plate and the contact plate are connected by bolts.

[0021] Preferably, the base includes a rectangular frame and a slide rail located on the top of the rectangular frame, and the bottom of the main frame is provided with a slide rail groove that matches the slide rail.

[0022] A method for rapid positioning of steel formwork includes the following steps:

[0023] S100, Fix the base in the preset position;

[0024] S200, Adjust the distance between the two horizontal sliding bodies to fit the steel template groove using the horizontal spacing adjustment component;

[0025] S300: The longitudinal spacing between two contacting bodies on the same transverse sliding body is simultaneously adjusted by the longitudinal spacing adjustment component;

[0026] S400, Make the groove of the steel template contact the contact body;

[0027] S500: Adjust the tilt angle of the support frame to the level indicated by the level gauge using the tilt adjustment component;

[0028] S600, slide the main frame to fine-tune the position of the steel formwork, and disassemble the device after fixing the steel formwork.

[0029] The beneficial effects of this invention are as follows:

[0030] This invention reduces the size of the positioning device through a compact design of the main frame, base, and formwork contact mechanism, making it suitable for narrow construction spaces such as tunnels and bridge railings. At the same time, it integrates synchronous high-precision adjustment functions for lateral spacing, longitudinal spacing, and tilt angle, overcoming the installation limitations caused by the large structure and the positioning deviation caused by the single adjustment function in the prior art. This allows it to flexibly adapt to different types of steel formwork, achieving rapid, accurate, and stable positioning of steel formwork under complex working conditions. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the rapid positioning device for ballastless track steel formwork provided by the present invention during use;

[0032] Figure 2 This is a schematic diagram of the connection between a rapid positioning device for ballastless track steel formwork and the steel formwork provided by the present invention;

[0033] Figure 3 This is a structural schematic diagram of a rapid positioning device for ballastless track steel formwork provided by the present invention;

[0034] Figure 4 This is a schematic diagram of the template contact mechanism in a rapid positioning device for ballastless track steel templates provided by the present invention;

[0035] Figure 5 This is a cross-sectional view of the drive unit in a rapid positioning device for ballastless track steel formwork provided by the present invention;

[0036] Figure 6 This is a schematic diagram of the structure between the lateral adjustment component and the support frame in a rapid positioning device for ballastless track steel formwork provided by the present invention;

[0037] Figure 7 This is a schematic diagram of the tilt adjustment component in a rapid positioning device for ballastless track steel formwork provided by the present invention.

[0038] In the diagram: 1. Base; 2. Main frame; 3. Template contact mechanism; 31. Support frame; 32. Lateral sliding body; 33. Longitudinal spacing adjustment assembly; 331. First lead screw; 332. Moving seat; 333. Driving pulley; 334. Driven pulley; 335. Return spring; 336. Adjusting handle; 337. Driving gear; 338. Driven gear; 339. Transmission belt; 34. Lateral spacing adjustment assembly; 341. Second lead screw; 342. Adjusting knob; 35. Inclination adjustment assembly; 351. Rotating rod; 352. Worm gear; 353. Worm; 354. Level; 36. Contact body; 361. Contact plate; 362. Connecting plate; 4. Steel template. Detailed Implementation

[0039] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0040] Example 1

[0041] Please refer to the following: Figures 1 to 3 A rapid positioning device for ballastless track steel formwork includes: a base 1, a main frame 2, and a formwork contact mechanism 3. The base 1 is a rectangular frame welded from four square steel pipes, with multiple through holes for connecting to studs on the placement surface. Nuts are then threaded onto the studs to fix the base 1 to the placement surface. Slide rails are located on the left and right sides of the top of the base 1, and the left and right sides of the bottom of the main frame 2 slide along two slide rails respectively, allowing the main frame 2 to slide back and forth along the top of the base 1, achieving position adjustment in the forward and backward direction.

[0042] The template contact mechanism 3 includes: a support frame 31, two transverse sliding bodies 32, a longitudinal spacing adjustment component 33, a transverse spacing adjustment component 34, and an inclination adjustment component 35. The support frame 31 is rotatably mounted on one side of the main frame 2. The two transverse sliding bodies 32 slide symmetrically on the support frame 31. Each transverse sliding body 32 has two symmetrically distributed contact bodies 36, which are used to contact the outer groove of the steel template 4 to establish a connection between the positioning device and the steel template 4. The longitudinal spacing adjustment component 33 includes a drive unit mounted on the main frame 2 and two transmission units that are connected to the drive unit. The two transmission units are correspondingly mounted on the transverse sliding bodies 32 and are connected to the two contact bodies 36 at corresponding positions. Driven by the drive unit, the two transmission units adjust the spacing between the two contact bodies 36 by the same displacement adjustment amount. The lateral spacing adjustment component 34 is provided on the support frame 31 and is used to adjust the spacing between the two lateral sliding bodies 32; the tilt adjustment component 35 is provided on the support frame 31 and is used to adjust the tilt angle of the support frame 31.

[0043] When using the above-mentioned positioning device, first fix the positioning device in the preset position. Then, according to the size of the rectangular slot on the outer side of the steel template 4, adjust the distance between the two horizontal sliding bodies 32 to match the distance between the vertical surfaces of the two rectangular slots using the horizontal distance adjustment component 34. Then, adjust the distance between the two contact bodies 36 located on the same horizontal sliding body 32 to match the height of the rectangular slot using the vertical distance adjustment component 33. When adjusting the vertical adjustment component, by operating the drive unit, the two transmission units can be driven to move synchronously, so that the two transmission units adjust the distance between the two contact bodies 36 with the same displacement adjustment amount. In this way, the distance between the two sets of contact bodies 36 is adjusted synchronously and with high precision. Then, the rectangular slot on the outer side of the steel template 4 is brought into contact with the four contact bodies 36, and the steel template 4 is lifted into the air. Then, the distance can be adjusted. The component or longitudinal adjustment component further adjusts the position of the contact body 36, making the contact body 36 more tightly connected to the rectangular slot, thereby improving the connection stability with the steel template 4. Subsequently, by pushing the main frame 2 to move horizontally on the base 1, the front and rear position of the steel template 4 can be adjusted. If the steel template 4 is not in a standard horizontal posture, the tilt angle of the steel template 4 can be further adjusted by the tilt adjustment component 35. Through the above operations, the steel template 4 can be adjusted to a standard posture. Finally, the fixing structure is used to fix the steel template 4 to the preset installation position. At this time, the steel template 4 has been locked by the positioning device, and its position will not be offset when it is fixed, ensuring the installation accuracy of the steel template 4. There is no need to repeat the adjustment multiple times. After fixing, the positioning device can be disassembled from the steel template 4, and the above operation can be repeated to install the next steel template 4. By using this positioning device, the installation difficulty of the steel template 4 is greatly reduced, and through the multi-directional adjustment mechanism, it can flexibly adapt to different types of steel templates 4.

[0044] Please refer to the following: Figures 3 to 4 To improve the stability of the contact body 36 after it is connected to the steel template 4, the present invention defines the specific structure of the contact body 36. Specifically, the contact body 36 includes an L-shaped contact plate 361 and a connecting plate 362 detachably connected to the contact plate 361. The two right-angled sides of the L-shaped plate can be fitted to the right-angled slots of the rectangular slots of the steel template 4, allowing the contact body 36 and the steel template 4 to make tight contact and improve the stability of the contact. The two right-angled sides of the contact plate 361 are provided with protective pads, which can be rubber pads with serrated surfaces, which can not only increase the friction between the contact body and the steel template 4, but also reduce wear. The end of the connecting plate 362 slides with the transverse sliding body 32. The detachable connection between the contact plate 361 and the connecting plate 362 allows for easy replacement of the contact plate 361 to adapt to different usage requirements.

[0045] Please refer to the following: Figures 3 to 5To achieve rapid adjustment of the spacing between the contact bodies 36, this invention discloses an embodiment of a longitudinal spacing adjustment component 33. Specifically, the transmission unit is a first lead screw 331 rotatably mounted on a transverse sliding body 32. The threads at the upper and lower ends of the first lead screw 331 are in opposite directions, and the corresponding two contact bodies 36 are threadedly connected to the upper and lower ends of the first lead screw 331. The driving unit includes a movable seat 332 slidably mounted on a support frame 31, a driving pulley 333 rotatably mounted on the movable seat 332, and two driven pulleys 334 fixed to the first lead screw 331. The driving pulley 333 is connected to the two driven pulleys 334 via a transmission belt 339. A return spring 335 is connected between the movable seat 332 and the support frame 31.

[0046] When in use, the aforementioned longitudinal spacing component rotates by the active pulley 333, which drives the two passive pulleys 334 to rotate synchronously, thereby driving the two first lead screws 331 to rotate. Since the threads at the upper and lower ends of the first lead screws 331 are in opposite directions, and the contact bodies 36 are simultaneously limited by the sliding body 32, the rotation of the first lead screws 331 allows the two contact bodies 36 to slide synchronously towards each other, thus changing the spacing between the two contact bodies 36. When the spacing is adjusted to the desired position, the active pulley 333 stops rotating, and the first lead screws 331 stop rotating. Under the locking action of their threads, the two contact bodies 36 remain fixed. In this way, the function of synchronously adjusting the spacing between the two sets of contact bodies 36 is realized, eliminating the need for separate adjustments, making the adjustment operation more convenient and the adjustment accuracy higher.

[0047] Please refer to the following: Figures 4 to 5 In order to improve the adjustment accuracy of the longitudinal spacing and reduce the adjustment difficulty, making it more convenient and labor-saving to adjust, the present invention further improves the above solution, specifically: the movable seat 332 has an adjustment handle 336 that rotates, the adjustment handle 336 has a driving gear 337 fixed on it, and the driving pulley 333 has a driven gear 338 that meshes with the driving gear 337 fixed on it. The diameter of the driven gear 338 is larger than the diameter of the driving gear 337.

[0048] During adjustment, rotating the adjustment handle 336 causes the drive gear 337 to drive the driven gear 338 to rotate. Since the diameter of the drive gear 337 is small, a speed difference is formed between the drive gear 337 and the drive gear 338, causing the driven gear 338 to drive the drive pulley 333 to rotate at a low speed. This allows the first lead screw 331 to rotate at a low speed, shortening its adjustment displacement and improving the adjustment accuracy.

[0049] Please refer to the following: Figure 3 and Figure 7The tilt adjustment assembly 35 includes a rotating rod 351 that rotates on the main frame 2, a worm gear 352 fixed to the rotating rod 351, a worm 353 meshing with the worm gear 352, and a level 354 fixed to the rotating rod 351. One end of the rotating rod 351 is fixed to the rotating end of the support frame 31, and the other end extends laterally from one side of the crossbeam of the main frame 2 to the outside of the other side of the crossbeam. The worm gear 352 is fixedly fitted on the outside of the rotating rod 351 and hidden inside the crossbeam. The worm 353 rotates laterally inside the crossbeam of the main frame 2, maintaining a vertical posture with the rotating rod 351 in the horizontal direction. The level 354 is fixed at the end of the rotating rod 351 away from the support frame 31, located exactly outside the main frame 2. It is used to reflect the current level status of the support frame 31, making it convenient for workers to determine whether the steel formwork 4 needs adjustment.

[0050] When the staff finds that the level 354 is not in the standard horizontal position, it means that the steel formwork 4 is not in the standard horizontal posture. It is necessary to adjust it by using the tilt adjustment component 35. During adjustment, the worm gear 353 is rotated, which drives the worm wheel 352 and the rotating rod 351 to rotate together, thereby making the support frame 31 and the steel formwork 4 rotate together until the level 354 is in the standard horizontal position. Then the rotation of the worm gear 353 can be stopped. Under the locking action of the worm gear 353, the support frame 31 and the steel formwork 4 can be kept in a stationary state.

[0051] Please refer to the following: Figure 3 and Figure 6 The lateral spacing adjustment component 34 includes a second lead screw 341 that rotates on the support frame 31. The threads at both ends of the second lead screw 341 are in opposite directions. Both ends of the second lead screw 341 are fixed with adjustment knobs 342. By rotating the adjustment knobs 342, the second lead screw 341 can drive the two lateral sliding bodies 32 to slide laterally towards each other on the support frame 31. At the same time, under the elastic force of the return spring 335, the moving seat 332 can be driven to slide linearly along the top of the main frame 2 in sync, so as to ensure that the transmission belt 339, the driving pulley 333, and the two driven pulleys 334 are always in a taut state, so that the longitudinal spacing adjustment component 33 can be used normally.

[0052] Example 2

[0053] In addition, the present invention also provides a method for quickly positioning ballastless track steel formwork using the above-mentioned positioning device, comprising the following steps:

[0054] S100. Fix the base 1 in the preset position. The operator fastens the mounting plate of the base 1 to the preset position of the tunnel side wall or bridge railing with anchor bolts to ensure that the base slide rail 11 is parallel to the installation direction of the steel template 4.

[0055] S200. Adjust the distance between the two horizontal sliding bodies 32 by adjusting the horizontal distance adjustment component 34. Rotate the screw handwheel 341 of the horizontal distance adjustment component 34 to drive the two-way screw 342 to drive the two horizontal sliding bodies 32 to slide synchronously in the opposite direction along the horizontal slide groove 21 of the main frame 2. Observe the scale to make the distance accurately match the width of the slot of the steel template 4.

[0056] S300. The longitudinal spacing of the contact body 36 is adjusted synchronously by the longitudinal spacing adjustment component 33. The handwheel 331 is rotated in conjunction with the transmission belt 334 to drive the two sets of opposing lead screws 331a on the same transverse sliding body 32 to rotate synchronously, so that the two contact bodies 36 move towards each other or away from each other along the longitudinal guide rail 322 to the predetermined spacing.

[0057] S400. Make the slot of the steel template 4 contact the contact body 36, align the slot of the steel template 4 with the adjusted contact body 36, and push the steel template 4 so that the inner wall of its slot is tightly fitted with the rubber protective pad of the contact body 36.

[0058] S500. Adjust the tilt angle of the support frame 31 by adjusting the tilt angle component 35. Observe the level 354 at the top of the support frame 31. If it shows tilt, rotate the worm handle 351 to drive the worm wheel 352, which will drive the support frame shaft 31a to rotate until the bubble of the level 354 is centered. Use the self-locking characteristic of the worm wheel and worm to fix the tilt angle.

[0059] S600, the main frame 2 is slidable and the device is disassembled. The locking bolt 11a of the base 1 is loosened, and the main frame 2 is slid along the slide rail 11 to drive the steel template 4 to make a positional adjustment. After the steel template 4 is fixed, concrete is poured. After initial setting, the quick-release pin 362a of the contact body 36 is pulled out to remove the device.

[0060] The embodiments of this specific implementation have been described above. However, this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A rapid positioning device for ballastless track steel formwork, characterized in that, include: Base, main frame, and template contact mechanism; The main frame is slidably mounted on the base; The template contact mechanism includes: a support frame, two transverse sliding bodies, a longitudinal spacing adjustment component, a transverse spacing adjustment component, and an inclination adjustment component; The support frame is rotatably mounted on one side of the main frame, and the two transverse sliding bodies slide symmetrically on the support frame. Each transverse sliding body is provided with two contact bodies that are symmetrically distributed vertically. The longitudinal spacing adjustment assembly includes a drive unit on the main frame and two transmission units that are connected to the drive unit. The two transmission units are respectively located on the transverse sliding body and are connected to two contact bodies at corresponding positions. Driven by the drive unit, the two transmission units adjust the spacing between the two contact bodies by the same displacement adjustment amount. The lateral spacing adjustment component is mounted on the support frame and is used to adjust the spacing between the two lateral sliding bodies; The tilt adjustment component is located on the support frame and is used to adjust the tilt angle of the support frame.

2. The rapid positioning device for ballastless track steel formwork according to claim 1, characterized in that, The contact body includes an L-shaped contact plate and a connecting plate detachably connected to the contact plate. The two right-angled sides of the contact plate are provided with protective pads, and the end of the connecting plate slides with a transverse sliding body.

3. The rapid positioning device for ballastless track steel formwork according to claim 1, characterized in that, The transmission part is a first lead screw rotatably mounted on a transverse sliding body. The threads at the upper and lower ends of the first lead screw are in opposite directions, and the two corresponding contact bodies are threadedly connected to the upper and lower ends of the first lead screw.

4. The rapid positioning device for ballastless track steel formwork according to claim 3, characterized in that, The drive unit includes a movable seat slidably mounted on the support frame, a driving pulley rotating on the movable seat, and two driven pulleys fixed to the first lead screw. The driving pulley is connected to the two driven pulleys via a transmission belt. A return spring is connected between the movable seat and the support frame.

5. A rapid positioning device for ballastless track steel formwork according to claim 4, characterized in that, An adjustment handle is rotatable on the movable seat, a drive gear is fixed on the adjustment handle, and a driven gear that meshes with the drive gear is fixed on the drive pulley. The diameter of the driven gear is larger than the diameter of the drive gear.

6. The rapid positioning device for ballastless track steel formwork according to claim 1, characterized in that, The tilt adjustment assembly includes a rotating rod that rotates on the main frame, a worm gear fixed on the rotating rod, a worm meshing with the worm gear, and a level fixed on the rotating rod. The end of the rotating rod is fixed to the rotating end of the support frame.

7. The rapid positioning device for ballastless track steel formwork according to claim 1, characterized in that, The lateral spacing adjustment assembly includes a second lead screw with double reverse threads, two lateral sliding bodies respectively threaded to both ends of the second lead screw, and adjustment knobs are provided at both ends of the second lead screw.

8. A rapid positioning device for ballastless track steel formwork according to claim 2, characterized in that, The protective pad is a rubber pad with serrated surface, and the connecting plate and the contact plate are connected by bolts.

9. A rapid positioning device for ballastless track steel formwork according to claim 1, characterized in that, The base includes a rectangular frame and a slide rail located on the top of the rectangular frame, and the bottom of the main frame is provided with a slide rail groove that is adapted to the slide rail.

10. A method for rapidly positioning steel formwork using the positioning device as described in any one of claims 1-9, characterized in that, The following steps are included: S100, Fix the base in the preset position; S200, Adjust the distance between the two horizontal sliding bodies to fit the steel template groove using the horizontal spacing adjustment component; S300: The longitudinal spacing between two contacting bodies on the same transverse sliding body is simultaneously adjusted by the longitudinal spacing adjustment component; S400, Make the groove of the steel template contact the contact body; S500: Adjust the tilt angle of the support frame to the level indicated by the level gauge using the tilt adjustment component; S600, slide the main frame to fine-tune the position of the steel formwork, and disassemble the device after fixing the steel formwork.

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