Cast-in-place bridge formwork dismounting device

Abstract

The invention provides a cast-in-place bridge formwork dismounting device. The cast-in-place bridge formwork dismounting device comprises an opening mechanism and a moving mechanism. The two opening mechanisms are arranged on the two opposite sides of the bridge pier so that a rectangular frame can be defined by the two opening mechanisms and the two formworks, the two ends of the opening mechanisms can be detachably installed on the two formworks correspondingly, and the opening mechanisms can apply opposite thrust to the two formworks so that the two formworks can be detached; each opening mechanism is provided with a moving mechanism, and each moving mechanism comprises a roller, a pushing piece and a driving piece; the rolling wheel is arranged on the side, close to the bridge pier, of the opening mechanism, the rolling wheel is installed on the opening mechanism through a pushing piece, and the opening mechanism can push the rolling wheel towards the bridge pier so that the rolling wheel can abut against the bridge pier; the driving piece can drive the roller to rotate. The opening mechanism is used for detaching the two templates; the rollers are controlled to rotate through the driving pieces, so that the rollers drive the two formworks to be detached from the bridge pier; therefore, the template does not need to be manually taken down, and only the opening mechanism needs to be detached from the template.

Description

Technical Field

[0001] The invention relates to the technical field of cast-in-place bridge formwork disassembly, and in particular to a cast-in-place bridge formwork disassembly device. Background Art

[0002] At present, most bridge piers are cubic columnar structures cast using steel formwork construction methods. Arc chamfers are set at the four vertical edges of the cube. The mold used usually uses four templates to splice into a hollow structure with a bridge pier. Two of the four templates used have exactly the same shape in relative positions, two of which are plane structures (referred to as surface templates), and the other two are structures with arc corners (referred to as end templates). After the pier concrete is poured, the concrete will squeeze the steel template. The two templates with plane structures are easier to remove, while the arc parts of the two templates with arc corner structures are squeezed by concrete, resulting in great difficulty in the removal of the two templates. In actual construction, the method of removing the two templates with arc corner structures is to manually remove the steel templates by hammering them with a hammer. However, this method has a slow construction speed when removing the steel templates.

[0003] The template disassembly device can also be used for disassembly. For example, the patent with the announcement number CN217078429U discloses a bridge pier column end template disassembly device, including a first bracket and a second bracket, the first bracket and the second bracket are respectively installed at the two ends of the opening mechanism, the opening mechanism is composed of a first multi-segment foldable rod and a second multi-segment foldable rod, the first multi-segment foldable rod and the second multi-segment foldable rod are hingedly connected by a plurality of pins, the first multi-segment foldable rod and the second multi-segment foldable rod are both provided with a plurality of rollers, and a retractable structure is installed between the first bracket and the second bracket. When the retractable structure is extended, the first bracket and the second bracket are separated from each other, so that the width of the opening mechanism is increased, and the opening of two bridge pier column end templates is realized. The device can dismantle two templates at the same time, avoiding damage to the surface of the bridge pier and affecting its aesthetics. The opening mechanism has multiple support points, the disassembly force applied is relatively uniform, and the disassembly efficiency is high.

[0004] However, when the end template is removed by using the template disassembly device, the template still needs to be manually dragged and removed, which is rather troublesome. Summary of the invention

[0005] In view of the above problems existing in the prior art, the technical problem to be solved by the present invention is that when removing the template, the existing template disassembly device still requires manual dragging and removal of the end template, which is quite troublesome.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solution: a cast-in-place bridge formwork disassembly device, comprising:

[0007] The expanding mechanism, with two said expanding mechanisms arranged on the opposite sides of the pier to form a rectangular frame with two templates. The two ends of the expanding mechanism can be detachably installed on the two templates respectively, and the expanding mechanism can apply an opposite thrust to the two templates to remove the two templates; and

[0008] The moving mechanism, with a moving mechanism installed on each said expanding mechanism. The moving mechanism includes: a roller, a pushing member, and a driving member; the roller is arranged on the side of the expanding mechanism close to the pier, the roller is installed on the expanding mechanism through the pushing member, the expanding mechanism can push the roller towards the pier to make the roller abut against the pier; the driving member can drive the roller to rotate.

[0009] Preferably, the expanding mechanism includes: a telescopic component and a clamping component; the two ends of the telescopic component are respectively installed with clamping components; the clamping components can clamp on the templates.

[0010] Preferably, the telescopic component includes: a cylinder body, a piston rod, and a pump body; the two piston rods are arranged along the length direction of the cylinder body and are located on the opposite sides in the length direction of the cylinder body; one end of the two piston rods is slidably inserted into the cylinder body in an opposite direction; the pump body is communicated with the cylinder body, and the communication part of the pump body is located between the two piston rods.

[0011] Preferably, the clamping component includes: a clamping seat, a clamping rod, a first clamping plate, and a second clamping plate; the clamping seat is provided with a first sliding channel, a second sliding channel, and a connecting channel; the first sliding channel and the second sliding channel are arranged parallel to each other; the connecting channel communicates the ends of the first sliding channel and the second sliding channel away from the telescopic component; the piston rod is inserted and matched with the first sliding channel, and the clamping rod is inserted and matched with the second sliding channel; the first clamping plate and the second clamping plate are arranged parallel to each other, and the first clamping plate is located on the side of the second clamping plate close to the telescopic component, the first clamping plate is fixedly installed on the clamping seat, and the second clamping plate is fixedly installed on the clamping rod; the expanding mechanism further includes a limiting component, and the limiting component can limit the piston rod from sliding in the first sliding channel.

[0012] Preferably, the limiting component includes: a one-way valve, a sealing plate, a rack, a gear, a rotating shaft, a pulling rope and a torsion spring; the one-way valve is slidably disposed in the connecting channel, and the one-way valve is slidably engaged with the connecting channel, and the one-way valve is in one-way communication with the second sliding channel; the connecting channel is perpendicular to the piston rod, and a limiting groove is formed on the piston rod for snap-fitting with one end of the one-way valve away from the second sliding channel; a plugging groove is formed at one end of the piston rod away from the cylinder block, and the plugging groove is arranged along the length direction of the piston rod; after one end of the piston rod away from the cylinder block abuts against the inner side wall of the first sliding channel, one end of the plugging groove communicates with the connecting channel through a first connection hole, and the other end of the plugging groove communicates with the outside through a second connection hole, and the one-way valve can slide into the limiting groove; the rack is arranged along the length direction of the plugging groove, and one end of the rack is fixedly installed on the inner side wall of the first sliding channel, and the other end of the rack extends into the plugging groove; the gear is coaxially and fixedly installed on the rotating shaft, the rotating shaft is rotatably installed on the piston rod, and the gear is engaged with the rack; a retaining edge is arranged on the inner side wall of the plugging groove; the sealing plate is arranged on one side of the retaining edge close to the rack, and one end of the sealing plate is hinged to the inner side wall of the plugging groove; the torsion spring applies a torsion force to the sealing plate to drive the other end of the sealing plate to abut against the retaining edge to close the plugging groove; one end of the pulling rope is fixedly installed on the rotating shaft, and the other end of the pulling rope is fixedly installed on the other end of the sealing plate to pull the sealing plate to open the plugging groove.

[0013] Preferably, a rubber pad is provided at the end of the sealing plate away from the hinge point.

[0014] Preferably, the pushing member includes: a sliding portion and a mounting portion, the sliding portion is perpendicular to the piston rod, one end of the sliding portion extends into the cylinder block and is slidably inserted into the cylinder block; the other end of the sliding portion is fixed with a mounting portion, and the roller is rotatably installed on the mounting portion.

[0015] Preferably, a plurality of rollers are arranged in parallel.

[0016] Compared with the prior art, the present invention has at least the following advantages:

[0017] 1. In the present invention, two spreading mechanisms are installed on two templates, so that the two spreading mechanisms and the two templates form a rectangular frame, and then the pushing member is controlled to move, so that the pushing member abuts the roller against the pier, and then the spreading mechanism is controlled to move, and the two spreading mechanisms apply a thrust to both sides of the template, so as to remove the two templates; and because the two rollers abut against the pier, the rectangular frame surrounded by the two spreading mechanisms and the two templates is clamped on the pier by two rollers; finally, the rollers are controlled to rotate by the driving member, so that the rollers drive the two templates to be removed from the pier; in this way, there is no need to remove the template manually, and only the spreading mechanism needs to be removed from the template.

[0018] 2. In the present invention, two clamping assemblies are respectively clamped on two templates to realize the detachability of the two ends of the propping mechanism; then the telescopic assembly is controlled to extend, so that a thrust can be applied to the template through the clamping assembly to remove the template from the bridge pier.

[0019] 3. In the present invention, by setting the clamping assembly, when the driving piston slides, the clamping assembly can be driven to clamp the template, and the template can be removed by applying a thrust to the template through the clamping assembly.

[0020] 4. In the present invention, after the pull rope is straightened, the pull rope overcomes the torsion of the torsion spring and drives the sealing plate to rotate; after the end away from the cylinder body abuts against the inner wall of the first sliding channel, the plug-in slot opens, so that the connecting channel is connected to the outside world through the first connecting hole, the plug-in slot, and the second connecting hole in sequence; in this way, the pressure of the one-way valve close to the first sliding channel is zero, because the one-way valve is closed in the direction of mocking the first sliding channel, therefore, under the action of the pressure in the second sliding channel, the one-way valve is pushed to slide toward the first sliding channel, so that the one-way valve slides and is engaged in the limit groove on the piston rod, thereby limiting the sliding of the piston rod.

[0021] 5. In the present invention, liquid or gas is introduced into the cylinder of the pump body, and under the action of pressure, the sliding part is pushed to slide outward, and then the roller is pushed to move toward the bridge pier through the mounting part, so that the roller abuts against the bridge pier; in this way, the action of the pump body can drive the piston rod to slide outward to push the template, while driving the roller to abut against the bridge pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation of the present invention, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 A schematic diagram of the installation of a cast-in-place bridge formwork disassembly device provided in an embodiment of the present invention.

[0024] Figure 2 Schematic three-dimensional view of a cast-in-place bridge formwork disassembly device provided in an embodiment of the present invention.

[0025] Figure 3 Schematic structural view of the clamping assembly and the limiting assembly provided in an embodiment of the present invention.

[0026] Figure 4 Schematic structural view of the moving mechanism provided in an embodiment of the present invention.

[0027] Reference numerals:

[0028] 1 - telescopic assembly, 11 - cylinder block, 12 - piston rod, 13 - insertion slot, 14 - first connection hole, 15 - second connection hole, 16 - retaining edge, 17 - limiting groove;

[0029] 2 - clamping assembly, 21 - clamping seat, 22 - clamping rod, 23 - first clamping plate, 24 - second clamping plate, 25 - first sliding channel, 26 - second sliding channel, 27 - connection channel;

[0030] 3 - limiting assembly, 31 - one-way valve, 32 - sealing plate, 33 - rack, 34 - gear, 35 - rotating shaft, 36 - pulling rope, 37 - rubber pad;

[0031] 4 - moving mechanism, 41 - roller, 42 - sliding part, 43 - mounting part;

[0032] 5 - bridge pier, 6 - formwork. Detailed implementation manners

[0033] Hereinafter, embodiments of the technical solutions of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and thus are only examples and should not be used to limit the protection scope of the present invention.

[0034] In the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0035] In the present invention, unless otherwise clearly defined and limited, terms such as "installation", "connection", "attachment", "fixation" and the like shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] See Figures 1 - 4 , an embodiment provided by the present invention: a cast-in-place bridge formwork disassembly device, comprising: a spreading mechanism and a moving mechanism 4; two spreading mechanisms are arranged on opposite sides of the bridge pier 5 to form a rectangular frame with two formworks 6. Both ends of the spreading mechanism can be detachably installed on the two formworks 6 respectively, and the spreading mechanism can apply an opposite thrust to the two formworks 6 to remove the two formworks 6; a moving mechanism 4 is installed on each spreading mechanism. The moving mechanism 4 includes: rollers 41, a pushing member and a driving member; the rollers 41 are arranged on the side of the spreading mechanism close to the bridge pier 5, and the rollers 41 are installed on the spreading mechanism through the pushing member. The spreading mechanism can push the rollers 41 towards the bridge pier 5 to make the rollers 41 rollingly abut against the bridge pier 5; the driving member can drive the rollers 41 to rotate.

[0037] During specific implementation, the two spreading mechanisms are installed on the two formworks 6 so that the two spreading mechanisms and the two formworks 6 form a rectangular frame. Then, control the pushing member to act so that the pushing member abuts the rollers 41 against the bridge pier 5. Then, control the spreading mechanism to act, and the two spreading mechanisms apply a thrust to both sides of the formwork 6 to remove the two formworks 6 in this way; and because the two rollers are abutted against the bridge pier 5 in opposite directions, the rectangular frame formed by the two spreading mechanisms and the two formworks 6 is clamped on the bridge pier 5 through the two rollers 41 in opposite directions; finally, control the rollers 41 to rotate through the driving member so that the rollers 41 drive the two formworks 6 to be removed from the bridge pier 5; in this way, it is not necessary to manually remove the formwork 6, and only the spreading mechanism needs to be removed from the formwork 6.

[0038] See Figures 1 - 4 , in other embodiments, the spreading mechanism includes: a telescopic assembly 1 and a clamping assembly 2; clamping assemblies 2 are respectively installed at both ends of the telescopic assembly 1; the clamping assemblies 2 can clamp on the formwork 6. During specific implementation, the two clamping assemblies 2 respectively clamp on the two formworks 6 to achieve the detachable connection of both ends of the spreading mechanism; then control the telescopic assembly 1 to extend, and in this way, a thrust can be applied to the formwork 6 through the clamping assemblies 2 to remove the formwork 6 from the bridge pier 5 of the bridge.

[0039] See Figures 1 - 4In other embodiments, the telescopic assembly 1 includes: a cylinder 11, a piston rod 12 and a pump body; the two piston rods 12 are arranged along the length direction of the cylinder 11 and are arranged on opposite sides of the length direction of the cylinder 11; one end of the two piston rods 12 is inserted into the cylinder 11 by sliding in opposite directions; the pump body is connected to the cylinder 11, and the connection point of the pump body is located between the two piston rods 12. In specific implementation, the pump body can be a hydraulic pump or an air pump; the pump body is controlled to move, and the pump body passes liquid or gas into the cylinder 11, so as to push the two piston rods 12 to slide outward, and then a thrust can be applied to the template 6 through the clamping assembly 2, so as to remove the template 6 from the bridge pier 5.

[0040] See also Figures 1 - 4 In other embodiments, the clamping assembly 2 includes: a clamping seat 21, a clamping rod 22, a first clamping plate 23, and a second clamping plate 24; a first sliding channel 25, a second sliding channel 26 and a connecting channel 27 are provided on the clamping seat 21; the first sliding channel 25 and the second sliding channel 26 are arranged in parallel with each other; the connecting channel 27 connects the first sliding channel 25 and the second sliding channel 26 at one end away from the telescopic assembly 1; the piston rod 12 is plugged into the first sliding channel 25, and the clamping rod 22 is plugged into the second sliding channel 26; the first clamping plate 23 and the second clamping plate 24 are arranged in parallel with each other, and the first clamping plate 23 is located on the side of the second clamping plate 24 close to the telescopic assembly 1, the first clamping plate 23 is fixedly mounted on the clamping seat 21, and the second clamping plate 24 is fixedly mounted on the clamping rod 22; the expansion mechanism also includes a limit assembly 3, which can limit the piston rod 12 from sliding in the first sliding channel 25.

[0041] During specific implementation, liquid or gas is introduced into the cylinder body 11 by the pump body to push the two piston rods 12 to slide outward, and the piston rod 12 pushes the clamping seat 21 to move, and the clamping seat 21 drives the first clamping plate 23 to move, so that the first clamping plate 23 abuts against the side edge of the template 6; in this way, the clamping seat 21 can stop moving; the piston rod 12 continues to move, so that the piston rod 12 moves in the first sliding channel 25, so that the air in the first sliding channel 25 is pushed into the second sliding channel 26 through the connecting channel 27, so as to drive the clamping rod 22 to slide outward of the second sliding channel 26, and the clamping rod 22 pushes the second clamping plate 24 to move toward the first clamping plate 23, so that the second clamping plate 24 abuts against the other side of the bottom plate side; in this way, the template 6 can be clamped; and then the piston rod 12 is limited to slide in the first sliding channel 25 by the limiting mechanism, so that the piston rod 12 can apply a thrust to the template 6 through the clamping assembly 2, so that the template 6 can be removed. To this end, by setting the clamping assembly 2, when the driving piston slides, the clamping assembly 2 can be driven to clamp the template 6, and the template 6 can be removed by applying a thrust to the template 6 through the clamping assembly 2.

[0042] See Figures 1 - 4 , in other embodiments, the limiting component 3 includes: a one-way valve 31, a sealing plate 32, a rack 33, a gear 34, a rotating shaft 35, a pulling rope 36 and a torsion spring; the one-way valve 31 is slidably disposed in the connection channel 27, and the one-way valve 31 is slidably engaged with the connection channel 27, and the one-way valve 31 is unidirectionally communicated toward the second sliding channel 26; the connection channel 27 is perpendicular to the piston rod 12, and a limiting groove 17 is formed on the piston rod 12 for snap-fitting with one end of the one-way valve 31 away from the second sliding channel 26; a plugging groove 13 is formed at one end of the piston rod 12 away from the cylinder block 11, and the plugging groove 13 is arranged along the length direction of the piston rod 12; after one end of the piston rod 12 away from the cylinder block 11 abuts against the inner side wall of the first sliding channel 25, one end of the plugging groove 13 is communicated with the connection channel 27 through the first connection hole 14, and the other end of the plugging groove 13 is communicated with the outside through the second connection hole 15, and the one-way valve 31 can slide into the limiting groove 17; the rack 33 is arranged along the length direction of the plugging groove 13, and one end of the rack 33 is fixedly installed on the inner side wall of the first sliding channel 25, and the other end of the rack 33 extends into the plugging groove 13; the gear 34 is coaxially and fixedly installed on the rotating shaft 35, the rotating shaft 35 is rotatably installed on the piston rod 12, and the gear 34 is engaged with the rack 33; a stop edge 16 is arranged on the inner side wall of the plugging groove 13; the sealing plate 32 is arranged on one side of the stop edge 16 close to the rack 33, and one end of the sealing plate 32 is hinged to the inner side wall of the plugging groove 13; further, a rubber pad 37 is arranged at the end of the sealing plate 32 away from the hinge point; through the elastic deformation of the rubber pad 37, the plugging groove 13 can be more conveniently sealed, and when the sealing plate 32 rotates by a certain angle, through the elastic deformation of the rubber pad 37, the plugging groove 13 can also be sealed to a certain extent; the torsion spring applies a torsion force to the sealing plate 32 to drive the other end of the sealing plate 32 to abut against the stop edge 16 to seal the plugging groove 13; one end of the pulling rope 36 is fixedly installed on the rotating shaft 35, and the other end of the pulling rope 36 is fixedly installed on the other end of the sealing plate 32 to pull the sealing plate 32 to open the plugging groove 13.

[0043] During specific implementation, the piston rod 12 slides into the first sliding channel 25, so that the rack 33 slides into the plugging groove 13, the rack 33 drives the rotating shaft 35 to rotate through the gear 34, and the rotating shaft 35 drives the pulling rope 36 to wind around the rotating shaft 35. At this time, the head end of the plugging groove 13 is communicated with the connection channel 27, so that the plugging groove 13 is filled with pressure. In this way, under the action of the torsion spring, the sealing plate 32 abuts against the stop edge 16, and thus the plugging groove 13 can be sealed; and the gas in the first sliding channel 25 enters the second sliding channel 26 through the one-way valve 31 and the connection channel 27.

[0044] After the pull rope 36 is straightened, the pull rope 36 overcomes the torsion force of the torsion spring and drives the sealing plate 32 to rotate. After the end far from the cylinder block 11 abuts against the inner wall of the first sliding channel 25, the insertion slot 13 is opened, so that the connection channel 27 is communicated with the outside through the first connection hole 14, the insertion slot 13, and the second connection hole 15 in sequence. In this way, the pressure at one end of the one-way valve 31 close to the first sliding channel 25 is zero. Since the one-way valve 31 is closed in the direction of mocking the first sliding channel 25, under the action of the pressure in the second sliding channel 26, the one-way valve 31 is pushed to slide towards the first sliding channel 25, so that the one-way valve 31 slides and is clamped in the limiting slot 17 on the piston rod 12 to limit the sliding of the piston rod 12.

[0045] After the template 6 is disassembled, the one-way valve 31 can be reset by discharging the gas in the second sliding channel 26.

[0046] See Figures 1 - 4 , in another embodiment, the pushing member includes a sliding portion 42 and a mounting portion 43. The sliding portion 42 is arranged perpendicular to the piston rod 12. One end of the sliding portion 42 extends into the cylinder block 11 and is slidably inserted into the cylinder block 11. The other end of the sliding portion 42 is fixed with a mounting portion 43, and the roller 41 is rotatably mounted on the mounting portion 43. During specific implementation, the pump body is controlled to act, and the pump body injects liquid or gas into the cylinder block 11. Under the action of pressure, the sliding portion 42 is pushed to slide outwards, and then the roller 41 is pushed towards the bridge pier 5 through the mounting portion 43, so that the roller 41 abuts against the bridge pier 5. In this way, when the pump body acts to drive the piston rod 12 to slide outwards to push the template 6, the roller 41 can be driven to abut against the bridge pier 5 at the same time. Further, a plurality of rollers 41 are arranged in parallel. By abutting the plurality of rollers 41 against the bridge pier 5, the stability of the rectangular frame can be improved.

[0047] 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 foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. A cast-in-place bridge formwork disassembly device, characterized in that: include: The two spreading mechanisms are arranged on opposite sides of the pier to form a rectangular frame with the two templates. The two ends of the spreading mechanism can be detachably mounted on the two templates, and the spreading mechanism can apply an opposite thrust to the two templates to remove the two templates. and A moving mechanism is installed on each of the expansion mechanisms, and the moving mechanism includes: a roller, a pushing member and a driving member; the roller is arranged on the side of the expansion mechanism close to the bridge pier, and the roller is installed on the expansion mechanism through the pushing member, and the expansion mechanism can push the roller toward the bridge pier to make the roller abut against the bridge pier; the driving member can drive the roller to rotate.

2. A cast-in-place bridge formwork disassembly device according to claim 1, characterized in that: The expansion mechanism comprises: a telescopic component and a clamping component; the two ends of the telescopic component are respectively installed with clamping components; the clamping components can be clamped on the template.

3. A cast-in-place bridge formwork disassembly device according to claim 2, characterized in that: The telescopic assembly includes: a cylinder body, a piston rod and a pump body; the two piston rods are arranged along the length direction of the cylinder body and are arranged on opposite sides of the length direction of the cylinder body; one ends of the two piston rods are inserted into the cylinder body for opposite sliding movement; the pump body is connected to the cylinder body, and the connection point of the pump body is located between the two piston rods.

4. The cast-in-place bridge formwork disassembly device according to claim 3, characterized in that: The clamping assembly includes: a clamping seat, a clamping rod, a first clamping plate, and a second clamping plate; the clamping seat is provided with a first sliding channel, a second sliding channel and a connecting channel; the first sliding channel and the second sliding channel are arranged in parallel with each other; the connecting channel connects the first sliding channel and the second sliding channel at one end away from the telescopic assembly; the piston rod is plugged into the first sliding channel, and the clamping rod is plugged into the second sliding channel; the first clamping plate and the second clamping plate are arranged in parallel with each other, and the first clamping plate is located on the side of the second clamping plate close to the telescopic assembly, the first clamping plate is fixedly mounted on the clamping seat, and the second clamping plate is fixedly mounted on the clamping rod; the spreading mechanism also includes a limit assembly, and the limit assembly can limit the piston rod from sliding in the first sliding channel.

5. The cast-in-place bridge formwork disassembly device according to claim 4, characterized in that: The limit assembly includes: a one-way valve, a sealing plate, a rack, a gear, a rotating shaft, a pull rope and a torsion spring; the one-way valve is slidably arranged in the connecting channel, and the one-way valve and the connecting channel are slidably matched, and the one-way valve is unidirectionally connected toward the second sliding channel; the connecting channel and the piston rod are arranged perpendicular to each other, and the piston rod is provided with a limit groove which is snap-fitted with the end of the one-way valve away from the second sliding channel; the piston rod is provided with a plug-in groove at the end away from the cylinder body, and the plug-in groove is arranged along the length direction of the piston rod; after the end of the piston rod away from the cylinder body abuts against the inner side wall of the first sliding channel, one end of the plug-in groove is connected with the connecting channel through the first connecting hole, and the other end of the plug-in groove is connected with the outside world through the second connecting hole, and the one-way valve can slide to the limit groove The rack is arranged along the length direction of the plug-in slot, and one end of the rack is fixedly mounted on the inner side wall of the first sliding channel, and the other end of the rack extends into the plug-in slot; the gear is coaxially fixedly mounted on the rotating shaft, and the rotating shaft is rotatably mounted on the piston rod, and the gear is meshed with the rack; a stop edge is provided on the inner side wall of the plug-in slot; the sealing plate is arranged on the side of the stop edge close to the rack, and one end of the sealing plate is hinged to the inner side wall of the plug-in slot; the torsion spring applies a torsion force to the sealing plate to drive the other end of the sealing plate to abut against the stop edge to close the plug-in slot; one end of the pull rope is fixedly mounted on the rotating shaft, and the other end of the pull rope is fixedly mounted on the other end of the sealing plate to pull the sealing plate to open the plug-in slot.

6. The cast-in-place bridge formwork disassembly device according to claim 5, characterized in that: A rubber pad is arranged at one end of the sealing plate away from the hinge point.

7. The cast-in-place bridge formwork disassembly device according to claim 3, characterized in that: The push member includes: a sliding part and a mounting part, the sliding part and the piston rod are arranged perpendicular to each other, one end of the sliding part extends into the cylinder body and is slidably plugged with the cylinder body; the other end of the sliding part is fixed with a mounting part, and the roller is rotatably mounted on the mounting part.

8. The cast-in-place bridge formwork disassembly device according to claim 7, characterized in that: A plurality of rollers are arranged in parallel.

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