A control device and control method for casting thickness of box beam bottom plate

Abstract

The present application relates to a control device for the pouring thickness of a box beam bottom plate and a control method thereof, and relates to the field of box beam manufacturing. A control device for the pouring thickness of a box beam bottom plate comprises a support frame, a clamping assembly and a pulling assembly, wherein the support frame is located at the top of an outer template and is fixedly connected to the outer template, the clamping assembly is arranged on the support frame and is detachably connected to the top of an inner template, the pulling assembly comprises a fiber bundle and a fixing part, a plurality of fiber bundles are arranged, and the plurality of fiber bundles are symmetrically arranged on both sides of the inner template, and the fiber bundles on one side of the inner template are alternately penetrated on the side walls of the inner template and the outer template, and a plurality of fixing parts are arranged, wherein every two fixing parts correspond to a fiber bundle, and the two fixing parts are respectively located at the two ends of the fiber bundle, and the fixing part is used to fix the fiber bundle and put the fiber bundle in a tensioned state. The present application has the effect of making the thickness of the bottom plate easy to control.

Description

Technical Field

[0001] The present application relates to the field of box girder manufacturing, and in particular to a control device and a control method for the casting thickness of a box girder bottom plate. Background Art

[0002] A box girder is a type of beam used in bridge engineering. It is hollow inside and has flanges on both sides of the upper part. The box girder is usually made of concrete cast in two steps. The first step is to cast the bottom plate and web plate, and the second step is to cast the top plate.

[0003] When pouring the box girder, an outer formwork and an inner formwork are used. The cross-sections of the inner and outer formworks along the length direction are both inverted trapezoidal. The inner formwork is located inside the outer formwork, and there is a gap between the inner and outer formworks. The inner formwork is fixedly connected to the top of the outer formwork through a support frame. The inner and outer formworks together constitute the pouring formwork of the box girder. When pouring, concrete is injected between the outer formwork and the inner formwork. The bottom plate is poured first, and then the web is poured. When pouring the web, the concrete at the web is squeezed toward the bottom plate. The inner formwork is supported by the support frame so that the thickness of the bottom plate is not easily affected by the concrete at the web.

[0004] Since the inner formwork of the box girder is usually a hollow structure, the concrete at the web is likely to cause the inner formwork to deform when it is squeezed onto the bottom plate, so that the thickness of the bottom plate is likely to exceed the set value. Summary of the invention

[0005] In order to make the thickness of the bottom plate easy to control, the present application provides a control device and a control method for the casting thickness of the box girder bottom plate.

[0006] In a first aspect, the present application provides a device for controlling the casting thickness of a box beam bottom plate, which adopts the following technical solution:

[0007] A device for controlling the pouring thickness of a box beam bottom plate, comprising:

[0008] A support frame, the support frame is located on the top of the outer template and is fixedly connected to the outer template;

[0009] A clamping assembly, which is disposed on the support frame and is detachably connected to the top of the inner template;

[0010] A pulling assembly, the pulling assembly comprising a fiber bundle and a fixing portion;

[0011] The fiber bundles are provided with a plurality of fiber bundles, the plurality of fiber bundles are symmetrically arranged on both sides of the inner template, and the fiber bundles on one side of the inner template are alternately penetrated on the side walls of the inner template and the outer template;

[0012] The fixing part is provided in plurality, wherein every two fixing parts correspond to one fiber bundle, and the two fixing parts are respectively located at two ends of the fiber bundle, and the fixing part is used to fix the fiber bundle and keep the fiber bundle in a tensioned state.

[0013] By adopting the above technical scheme, the inner formwork is connected to the support frame through the clamping assembly, and the clamping assembly makes the inner formwork in a stable state relative to the outer formwork, so that the inner formwork is not easy to float up when squeezed by the web concrete, thereby facilitating the control of the pouring thickness of the bottom plate; since the clamping assembly and the inner formwork are detachably connected, the connection between the support frame and the inner formwork is not easy to affect the pouring of the box girder top plate; the side walls of the inner formwork and the side walls of the outer formwork are tightened by the fiber bundle, and the fiber bundle is fixed by the fixing part, so that the side walls of the inner formwork and the side walls of the outer formwork are in a stressed state, so that the concrete of the web can offset the pulling force of the fiber bundle when squeezing the inner formwork, so that the concrete at the web is not easy to deform the inner formwork, reducing the influence of the pouring of the web concrete on the thickness of the bottom plate, thereby making the thickness of the bottom plate easy to control.

[0014] Optionally, the fixing portion is arranged on the outer wall of the outer template, and the fixing portion includes a bolt column and a fixing nut. The bolt column is annular and has a slot on one side. The fiber bundle is passed through the bolt column and the end is located in the slot. The fixing nut is threadedly connected to the bolt column. The end of the fiber bundle is located between the fixing nut and the outer wall of the outer template, and is tightly abutted against the fixing nut and the outer wall of the outer template.

[0015] By adopting the above technical solution, the fixing part is arranged on the outer side wall of the outer formwork, so that the fiber bundle is fixed conveniently and quickly; the fiber bundle is placed in the slot after being tightened, and the fixing nut is rotated, and the fixing nut moves on the bolt column through the thread until the fixing nut presses the fiber bundle tightly against the outer side wall of the outer formwork, so that the fiber bundle is easy to fix, thereby improving the construction efficiency of the box girder.

[0016] Optionally, a plurality of clamping holes are formed on the fixing nut, and the clamping holes penetrate through the outer side wall of the fixing nut, and the ends of the fiber bundle are inserted into the plurality of clamping holes.

[0017] By adopting the above technical solution, the fiber bundle is inserted into a plurality of clamping holes, and the fixing nut forms a limit on the fiber bundle through the plurality of clamping holes during the rotation process, so that the fiber bundle is further tightened, thereby making it easier for the fixing nut to further tighten the fiber bundle during the process of squeezing the fiber bundle, making it easier for the fiber bundle to be in a stable tensioned state.

[0018] Optionally, the fiber bundle is made of glass fiber filaments.

[0019] By adopting the above technical solution, since glass fiber yarns are low in price and have high tensile strength, glass fiber yarns are used to manufacture fiber bundles, thereby reducing the cost of the fiber bundles while ensuring the tensile capacity of the fiber bundles.

[0020] Optionally, the clamping assembly includes a hydraulic cylinder, an electromagnet and a clamping plate, the hydraulic cylinder is fixedly arranged on the support frame with the piston rod facing the inner template, the electromagnet is fixedly connected to the piston rod of the hydraulic cylinder, the clamping plate is fixedly embedded in the top surface of the inner template and corresponds to the electromagnet, the clamping plate is made of ferromagnetic material, and the electromagnet and the clamping plate are adsorbed on each other.

[0021] By adopting the above technical scheme, the piston rod of the hydraulic cylinder is adsorbed to the clamping plate on the inner formwork through the electromagnet, so that the inner formwork can be easily disconnected from the support frame by cutting off the power of the electromagnet, thereby making it easy to disassemble and assemble the inner formwork and the support frame; by retracting the piston rod of the hydraulic cylinder, it is easy to leave space for pouring the box girder top plate, so that the hydraulic cylinder drives the electromagnet to connect with the clamping plate, making it easy for the inner formwork to control the thickness of the bottom plate and not easily affect the pouring of the box girder top plate.

[0022] Optionally, the clamping plate passes through the top of the inner template, and a slide cylinder is fixedly connected to the side of the clamping plate close to the inner template, a magnetic block is slidably arranged in the slide cylinder, a sliding rod is fixedly connected to the side of the magnetic block away from the clamping plate, and the end of the sliding rod away from the magnetic block is fixedly connected to the first support plate.

[0023] By adopting the above technical scheme, when the electromagnet is adsorbed on the clamping plate, the electromagnet magnetizes the clamping plate made of ferromagnetic material. When the box girder is cast, the magnetic poles of the electromagnet and the magnetic block on the side close to each other are the same. The electromagnet pushes the magnetic block to move in the direction away from the clamping plate by magnetic force until the first support plate is tightly abutted against the bottom end of the inner formwork. The first support plate provides supporting force to the bottom end of the inner formwork, so that the bottom end of the inner formwork is not easily deformed due to the extrusion of concrete at the web. When the inner formwork is demoulded, the magnetic poles of the electromagnet and the magnetic block on the side close to each other are opposite. The electromagnet pulls the magnetic block to move in the direction close to the clamping plate by magnetic force. The magnetic block pulls the first support plate to move, thereby releasing the supporting force of the first support plate on the inner formwork, so that a gap is generated between the bottom end of the inner formwork and the concrete, thereby facilitating the demoulding of the inner formwork.

[0024] Optionally, a plurality of support rods are fixedly connected to the sliding rod, and the plurality of support rods are symmetrically arranged on both sides of the sliding rod, the support rods on both sides of the sliding rod correspond to the two sides of the inner template, and one end of the support rod away from the sliding rod is fixedly connected to a second support plate, and the second support plate is used to abut against the side wall of the inner template when the first support plate abuts against the bottom end of the inner template.

[0025] By adopting the above technical solution, the second support plate moves with the first support plate through the support rod. When the first support plate abuts against the bottom end of the inner formwork, the second support plate abuts against the side wall of the inner formwork. Therefore, the support of the side wall of the inner formwork by the second support plate makes it difficult for the side wall of the inner formwork to be deformed due to the extrusion of concrete at the web. At the same time, through the joint action of the sliding rod, the first support plate, the support rod and the second support plate, the cross-sectional stiffness of the hollow inner formwork is improved, making the inner formwork less likely to be deformed.

[0026] Optionally, a connecting rod is fixedly connected between two adjacent second support plates, and a third support plate is fixedly connected to the side of the connecting rod close to the inner template, and the third support plate is used to abut against the fiber bundle when the second support plate abuts against the side wall of the inner template.

[0027] By adopting the above technical solution, the third support plate moves with the second support plate through the connecting rod. When the second support plate abuts against the side wall of the inner template, the third support plate also abuts against the side wall of the inner template, thereby increasing the support points for the side wall of the inner template through the third support plate, further making the inner template less likely to deform; the third support plate abuts against the fiber bundle, making the connection between the fiber bundle in a tensioned state and the inner template more stable, and improving the tensioning effect of the fiber bundle on the inner template and the outer template.

[0028] Optionally, a rubber layer is fixedly connected to one side of the third support plate close to the inner template side wall.

[0029] By adopting the above technical solution and arranging a rubber layer on the third support plate, the squeezing effect of the third support plate on the fiber bundle is made more stable, and sliding between the third support plate and the fiber bundle is not likely to occur.

[0030] In a second aspect, the present application provides a control method for a device for controlling the casting thickness of a box girder bottom plate, which adopts the following technical solution:

[0031] A control method for a device for controlling the casting thickness of a box beam bottom plate, comprising the following steps:

[0032] Fixing the inner template: fixedly connecting the support frame to the outer template, detachably connecting the inner template to the support frame through the clamping assembly, so that the inner template is installed inside the outer template;

[0033] Pulling the inner template: alternately passing the fiber bundles through the side walls of the inner template and the outer template, and tightening the fiber bundles;

[0034] Fixing the fiber bundle: fixing the tensioned state of the fiber bundle through the fixing parts at both ends of the fiber bundle, so that the side walls of the inner template and the outer template are in a tensioned state.

[0035] By adopting the above technical scheme, the inner formwork is detachably connected to the support frame through the clamping assembly, so that the concrete at the web is not easy to cause the inner formwork to float up, and the pouring of the box beam top plate is not easily affected by the clamping assembly; the side walls of the inner formwork and the outer formwork are tightened by the fiber bundle, so that the side walls of the inner formwork and the outer formwork are in a mutually pulling stress state, so that the extrusion of the concrete at the web on the inner formwork is not easy to cause the hollow inner formwork to deform, and then the thickness of the box beam bottom plate is not easy to exceed the set value of the bottom plate thickness due to the extrusion of the web concrete, so that the thickness of the bottom plate is easy to control.

[0036] In summary, the present application includes at least one of the following beneficial technical effects:

[0037] 1. The fiber bundles are alternately inserted into the side walls of the inner and outer formworks, and the fiber bundles are kept in a tensioned state. The fiber bundles pull the inner formwork, so that the hollow inner formwork is not easily deformed due to the extrusion of concrete at the web, thereby making the thickness of the bottom plate easy to control;

[0038] 2. Insert the fiber bundle into a plurality of clamping holes, rotate the fixing nut, and the fixing nut tightens the fiber bundle through the clamping holes and squeezes the fiber bundle on the outer wall of the outer template, so that the tension of the fiber bundle on the inner template and the outer template is more stable, and the fixing of the fiber bundle and the outer wall of the outer template is more convenient and quick;

[0039] 3. The electromagnet drives the magnetic block and the magnetic block pushes the slide bar, so that the first support plate, the second support plate and the third support plate can provide support force to the inner template, making the inner template less likely to deform. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of an embodiment of the present application;

[0041] Figure 2 yes Figure 1 Magnified view at A in the middle;

[0042] Figure 3 It is a schematic diagram for explaining the structure of the fixing part;

[0043] Figure 4 is a cross-sectional view intended to illustrate a support assembly;

[0044] Figure 5 yes Figure 1 Magnified view at B.

[0045] Description of reference numerals:

[0046] 1. Support frame; 2. Clamping assembly; 21. Hydraulic cylinder; 22. Electromagnet; 23. Clamping plate; 3. Pulling assembly; 31. Fiber bundle; 32. Fixing part; 321. Bolt column; 3211. Slot; 322. Fixing nut; 3221. Hole; 4. Support assembly; 41. Slide cylinder; 42. Magnetic block; 43. Slide rod; 431. First support plate; 44. Support rod; 441. Second support plate; 5. Connecting rod; 51. Third support plate; 511. Rubber layer. DETAILED DESCRIPTION

[0047] The following is combined with Figure 1-5 This application is described in further detail.

[0048] The present application embodiment discloses a device for controlling the casting thickness of a box beam bottom plate. Figure 1 A device for controlling the pouring thickness of a box girder bottom plate comprises a support frame 1, a clamping assembly 2, a pulling assembly 3 and a support assembly 4. The support frame 1 is fixedly arranged on an outer formwork, the clamping assembly 2 is arranged on the support frame 1 and is used to make the inner formwork detachably connected to the support frame 1, the pulling assembly 3 is arranged on the side wall of the outer formwork and is used to make the side wall of the inner formwork and the side wall of the outer formwork in a tensioned state, and the support assembly 4 is arranged inside the inner formwork and is used to provide a supporting force to the inner formwork.

[0049] When in use, the clamping component 2 detachably connects the inner formwork to the support frame 1 and installs the inner formwork inside the outer formwork. The pulling component 3 tightens the side walls of the inner and outer formworks. The supporting component 4 provides supporting force to the inside of the inner formwork, so that the concrete poured on the web is not easily squeezed onto the bottom plate, and the squeezing of the concrete at the web on the inner formwork is not easy to cause the inner formwork to deform, thereby making the thickness of the bottom plate easy to control.

[0050] Reference Figure 1 The pulling component 3 includes a fiber bundle 31 and a fixing portion 32. The fiber bundle 31 is in a long strip shape and is made of glass fiber. Two fiber bundles 31 are provided. The two fiber bundles 31 are respectively located on both sides of the length direction of the outer template. The fiber bundles 31 are alternately penetrated on the side walls of the inner template and the outer template, and both ends are located on the side of the outer template away from the inner template. The fiber bundle 31 is slidably connected to the inner template and the outer template.

[0051] There are multiple fixing parts 32, and every two fixing parts 32 correspond to one fiber bundle 31. The two fixing parts 32 corresponding to one fiber bundle 31 are respectively located at two ends of the fiber bundle 31 and are both arranged on the outer side wall of the outer template.

[0052] Reference Figure 2 and Figure 3The fixing part 32 includes a bolt column 321 and a fixing nut 322. The bolt column 321 is in a circular column shape and is fixedly arranged on the outer wall of the outer template. The axial direction of the bolt column 321 is perpendicular to the plate surface of the outer wall of the outer template. A slot 3211 is provided on one side of the bolt column 321. The slot 3211 is rectangular and penetrates the wall thickness of the bolt column 321. The length direction of the slot 3211 is the same as the axial direction of the bolt column 321. The two ends of the length direction of the slot 3211 penetrate the two ends of the axial direction of the bolt column 321 respectively.

[0053] The fixing nut 322 is threadedly connected to the bolt column 321. Two clamping holes 3221 are provided on the side wall of the fixing nut 322. The clamping holes 3221 are circular and are respectively located on both sides of the axis direction of the bolt column 321. The two clamping holes 3221 are arranged in parallel. The clamping holes 3221 penetrate the side wall of the fixing nut 322 and do not pass through the interior of the fixing nut 322. The clamping holes 3221 are adapted to the fiber bundle 31.

[0054] The end of the fiber bundle 31 is located in the slot 3211 and is inserted into the two holes 3221. The end of the fiber bundle 31 is located between the fixing nut 322 and the outer wall of the outer template and is tightly abutted against the fixing nut 322 and the outer wall of the outer template. The fiber bundle 31 is in a tensioned state.

[0055] When in use, the fiber bundle 31 is alternately inserted between the outer formwork and the inner formwork, and both ends of the fiber bundle 31 are inserted into the bolt column 321, so that the end of the fiber bundle 31 is placed in the slot 3211, and the fixing nut 322 is rotated to move the fixing nut 322 to the end of the fixing nut 322 close to the outer wall of the outer formwork, and then the end of the fiber bundle 31 is inserted into the two holes 3221. The two holes 3221 limit the fiber bundle 31, and the fixing nut 322 is continued to be rotated. The fixing nut 322 further tightens the fiber bundle 31 and squeezes the fiber bundle 31 on the outer wall of the outer formwork, so that the inner formwork is not easily deformed through the pulling effect of the fiber bundle 31 on the inner and outer formworks, and then the extrusion of the web concrete on the inner formwork is not easy to affect the thickness of the bottom plate, so that the thickness of the bottom plate is easy to control.

[0056] Reference Figure 1 and Figure 4 There are multiple clamping assemblies 2, all of which are located between the support frame 1 and the top surface of the inner template. The multiple clamping assemblies 2 are arranged along the length direction of the inner template. The clamping assemblies 2 include a hydraulic cylinder 21, an electromagnet 22 and a clamping plate 23. The hydraulic cylinder 21 is vertically arranged and fixedly connected to the bottom surface of the top of the support frame 1, and the piston rod of the hydraulic cylinder 21 faces the inner template.

[0057] The electromagnet 22 is in the shape of a circular block and is fixedly arranged on the piston rod of the hydraulic cylinder 21; the clamping plate 23 is in the shape of a circular plate and is inserted through the top of the inner template. The clamping plate 23 is arranged horizontally and its top surface is flush with the outer surface of the top of the inner template. The thickness of the clamping plate 23 is equal to the wall thickness of the inner template. The center of the clamping plate 23 is located on the central axis of the inner template along the length direction. The clamping plate 23 is coaxially arranged with the electromagnet 22 and is made of ferromagnetic material. The hydraulic cylinder 21 is in the extended state, and the electromagnet 22 and the clamping plate 23 are mutually attracted.

[0058] When in use, the hydraulic cylinder 21 is fixedly connected to the clamping plate 23 through the electromagnet 22. When pouring the bottom plate and the web, the electromagnet 22 is energized and adsorbed with the clamping plate 23. The inner formwork is fixedly connected to the support frame 1 through the hydraulic cylinder 21. Under the support of the hydraulic cylinder 21, the concrete poured in the web is not easy to cause the inner formwork to float, so that the thickness of the bottom plate is easy to control; when pouring the top plate, the electromagnet 22 is de-energized, and the adsorption of the electromagnet 22 and the clamping plate 23 is released, so that the hydraulic cylinder 21 is retracted, and then when pouring the top plate, the connection between the inner formwork and the support frame 1 is not easy to affect the pouring of the top plate.

[0059] Reference Figure 4 , there are multiple support assemblies 4, which correspond to the clamping assemblies 2 one by one. The multiple support assemblies 4 are all located inside the inner template. The support assembly 4 includes a slide 41, a magnetic block 42, a slide rod 43 and a support rod 44. The slide 41 is in a circular cylindrical shape and is coaxially arranged with the clamping plate 23. The slide 41 is vertically arranged, and the top end is fixedly connected to the bottom surface of the clamping plate 23. The magnetic block 42 is in a circular block shape and is adapted to the slide 41. The magnetic block 42 is slidably arranged in the slide 41 and is coaxially arranged with the slide 41.

[0060] Reference Figure 1 and Figure 4 The slide bar 43 is in the shape of a long rod and is located at the end of the magnet block 42 away from the pressing plate 23. The slide bar 43 is vertically arranged and the top end is fixedly connected to the magnet block 42. The connection between the slide bar 43 and the magnet block 42 is located at the center of the circle of the magnet block 42. The end of the slide bar 43 away from the magnet block 42 is fixedly connected to a first support plate 431. The first support plate 431 is in the shape of a circular plate and is arranged horizontally. The first support plate 431 is coaxially arranged with the magnet block 42.

[0061] Reference Figure 1Two support rods 44 are provided, and the two support rods 44 are respectively located on both sides of the sliding rod 43, and the two support rods 44 respectively correspond to the two side walls of the inner template, and the support rod 44 is in the shape of a long rod and is perpendicularly arranged to the side wall of the inner template, and one end of the support rod 44 away from the side wall of the inner template is fixedly connected to the sliding rod 43, and one end close to the side wall of the inner template is fixedly connected to the second support plate 441, the second support plate 441 is in the shape of a circular plate, and the plate surface is perpendicularly arranged to the support rod 44, and the connection between the second support plate 441 and the support rod 44 is located at the center of the second support plate 441.

[0062] Reference Figure 5 A connecting rod 5 is fixedly connected between two adjacent second support plates 441. The connecting rod 5 is located on the side of the second support plate 441 close to the support rod 44. The connecting rod 5 is in the shape of a long rod, and its length direction is the same as the length direction of the inner template. A third support plate 51 is fixedly connected to the middle of the side of the connecting rod 5 close to the second support plate 441. The third support plate 51 is in the shape of a rectangular plate, and its length direction is the same as the length direction of the connecting rod 5. The third support plate 51 is arranged parallel to the second support plate 441. A rubber layer 511 is fixedly arranged on the side of the third support plate 51 away from the connecting rod 5.

[0063] Reference Figure 1 and Figure 5 When the first support plate 431 abuts against the bottom end of the inner template, the second support plate 441 abuts against the side wall of the inner template, and the rubber layer 511 on the third support plate 51 abuts against the side wall of the inner template and tightly abuts against the fiber bundle 31.

[0064] When in use, the magnetic poles of the electromagnet 22 and the magnetic block 42 on the side close to each other are the same, and the electromagnet 22 pushes the magnetic block 42 to slide in the direction away from the pressing plate 23 through the magnetic force, and the magnetic block 42 drives the slide bar 43 to move, and the slide bar 43 drives the first support plate 431 and the support rod 44 to move, and the support rod 44 drives the second support plate 441 to move, and the second support plate 441 drives the third support plate 51 to move through the connecting rod 5, until the first support plate 431 is tightly abutted against the bottom end of the inner template, and the second support plate 441 is tightly abutted against the side of the inner template. The inner template is tightly abutted against the rubber layer 511 of the third support plate 51 and the side wall of the inner template, so that the first support plate 431, the second support plate 441 and the third support plate 51 provide support for the inside of the inner template, so that the inner template is not easily deformed. At the same time, the rubber layer 511 of the third support plate 51 is tightly abutted against the fiber bundle 31, so that the influence of the concrete at the web on the bottom plate thickness is reduced through the pulling of the fiber bundle 31 and the support of the first support plate 431, the second support plate 441 and the third support plate 51.

[0065] The implementation principle of the control device for casting thickness of the bottom plate of a box beam of the present application is as follows: when in use, the fiber bundles 31 are alternately inserted into the side walls of the inner and outer templates, and the fiber bundles 31 are tightened, the ends of the fiber bundles 31 are inserted into the bolt column 321 and placed into the card slot 3211, and then the ends of the fiber bundles 31 are inserted into the two card holes 3221, and the fixing nuts 322 are rotated, and the fixing nuts 322 further tighten the fiber bundles 31 and press the fiber bundles 31 against the outer side wall of the outer template, so that the fiber bundles 31 is in a tensioned state, the hydraulic cylinder 21 adsorbs the electromagnet 22 on the clamping plate 23, and pushes the slide bar 43 to slide by magnetic force until the rubber layers 511 of the first support plate 431, the second support plate 441, and the third support plate 51 are all in contact with the inner template, thereby reducing the influence of the concrete at the web on the thickness of the bottom plate through the pulling of the fiber bundle 31, the adsorption of the electromagnet 22 on the clamping plate 23, and the support of the first support plate 431, the second support plate 441, and the third support plate 51, thereby making it easier to control the thickness of the bottom plate.

[0066] The present application also discloses a control method for a device for controlling the casting thickness of a box beam bottom plate, comprising the following steps:

[0067] Fix the inner template: the support frame 1 is fixedly connected to the outer template, the piston rod of the hydraulic cylinder 21 is extended, and the electromagnet 22 is adsorbed onto the clamping plate 23, and the hydraulic cylinder 21 fixes the inner template to the inside of the outer template through the electromagnet 22 and the clamping plate 23;

[0068] Pulling the inner template: alternately inserting the fiber bundles 31 on the side walls of the inner template and the outer template, and tightening the fiber bundles 31;

[0069] Fix the fiber bundle 31: insert the fiber bundle 31 into the bolt column 321, then place the end of the fiber bundle 31 into the clamping groove 3211, and insert the end of the fiber bundle 31 into the two clamping holes 3221, rotate the fixing nut 322, the fixing nut 322 tightens the fiber bundle 31, and presses the fiber bundle 31 against the outer side wall of the outer template, so that the side walls of the inner template and the outer template are in a tension state:

[0070] Support the inner template: make the magnetic poles of the electromagnet 22 and the magnetic block 42 close to each other the same, the electromagnet 22 pushes the magnetic block 42 to slide through the magnetic force, the magnetic block 42 drives the slide bar 43 and the support rod 44 to move, the slide bar 43 drives the first support plate 431 to closely abut against the bottom end of the inner template, the support rod 44 drives the second support plate 441 and the rubber layer 511 of the third support plate 51 to closely abut against the side wall of the inner template, and makes the rubber layer 511 of the third support plate 51 closely abut against the fiber bundle 31.

[0071] When the web of the box girder is poured, the concrete at the web produces an extrusion force on the inner formwork and has a tendency to move toward the bottom plate. The hydraulic cylinder 21 uses the electromagnet 22 and the clamping plate 23 to stably fix the inner formwork inside the outer formwork, so that the inner formwork is not easy to float up under the extrusion of the web concrete, making it easy to control the thickness of the bottom plate; the electromagnet 22 pushes the magnetic block 42 to move through the magnetic force, and the magnetic block 42 uses the sliding rod 43 and the supporting rod 44 to make the rubber layers 511 of the first supporting plate 431, the second supporting plate 441, and the third supporting plate 51 all tightly abut against the inner formwork, thereby By supporting the inside of the inner formwork, the rigidity of the inner formwork is improved, so that the extrusion pressure of the concrete at the web on the inner formwork is not easy to cause the inner formwork to deform, so that the thickness of the bottom plate is not easily affected by the extrusion of the concrete at the web; the fiber bundles 31 are alternately inserted into the side walls of the inner and outer formworks, and the fiber bundles 31 are tightened and pressed against the outer side walls of the outer formwork by fixing the nuts 322. The side walls of the inner and outer formworks are placed in a stressed state by the fiber bundles 31, thereby reducing the influence of the concrete at the web on the thickness of the bottom plate, making the thickness of the bottom plate easy to control.

[0072] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for controlling the casting thickness of a box beam bottom plate, characterized in that: include: A support frame (1), the support frame (1) being located on top of the outer formwork and fixedly connected to the outer formwork; A clamping assembly (2), the clamping assembly (2) being arranged on the support frame (1) and being detachably connected to the top of the inner template, the clamping assembly (2) comprising a hydraulic cylinder (21), an electromagnet (22) and a clamping plate (23), the hydraulic cylinder (21) being fixedly arranged on the support frame (1) and having its piston rod facing the inner template, the electromagnet (22) being fixedly connected to the piston rod of the hydraulic cylinder (21), the clamping plate (23) being fixedly embedded in the top surface of the inner template and corresponding to the electromagnet (22), the clamping assembly (21 ... The plate (23) is made of ferromagnetic material, and the electromagnet (22) and the clamping plate (23) are mutually attracted; the clamping plate (23) passes through the top end of the inner template, and a side of the clamping plate (23) close to the inner template is fixedly connected to a slide cylinder (41), a magnetic block (42) is slidably arranged in the slide cylinder (41), a side of the magnetic block (42) away from the clamping plate (23) is fixedly connected to a slide rod (43), and an end of the slide rod (43) away from the magnetic block (42) is fixedly connected to a first support plate (431); A pulling assembly (3), the pulling assembly (3) comprising a fiber bundle (31) and a fixing portion (32); The fiber bundles (31), wherein a plurality of the fiber bundles (31) are provided, and the plurality of the fiber bundles (31) are symmetrically arranged on both sides of the inner template, and the fiber bundles (31) on one side of the inner template are alternately arranged on the side walls of the inner template and the outer template; The fixing parts (32) are provided in plurality, wherein every two fixing parts (32) correspond to one fiber bundle (31), and the two fixing parts (32) are respectively located at two ends of the fiber bundle (31), and the fixing parts (32) are used to fix the fiber bundle (31) and to place the fiber bundle (31) in a tensioned state.

2. A device for controlling the casting thickness of a box beam bottom plate according to claim 1, characterized in that: The fixing portion (32) is arranged on the outer side wall of the outer template, and comprises a bolt column (321) and a fixing nut (322); the bolt column (321) is annular and has a slot (3211) on one side; the fiber bundle (31) is inserted into the bolt column (321) and an end portion is located in the slot (3211); the fixing nut (322) is threadedly connected to the bolt column (321); an end portion of the fiber bundle (31) is located between the fixing nut (322) and the outer side wall of the outer template, and is in tight contact with the fixing nut (322) and the outer side wall of the outer template.

3. A device for controlling the casting thickness of a box beam bottom plate according to claim 2, characterized in that: The fixing nut (322) is provided with a plurality of clamping holes (3221), the clamping holes (3221) passing through the outer side wall of the fixing nut (322), and the ends of the fiber bundle (31) are inserted into the plurality of clamping holes (3221).

4. A device for controlling the casting thickness of a box beam bottom plate according to claim 1, characterized in that: The fiber bundle (31) is made of glass fiber filaments.

5. The device for controlling the casting thickness of the box beam bottom plate according to claim 1, characterized in that: A plurality of support rods (44) are fixedly connected to the slide rod (43), and the plurality of support rods (44) are symmetrically arranged on both sides of the slide rod (43). The support rods (44) on both sides of the slide rod (43) correspond to the two sides of the inner template. One end of the support rod (44) away from the slide rod (43) is fixedly connected to a second support plate (441), and the second support plate (441) is used to abut against the side wall of the inner template when the first support plate (431) abuts against the bottom end of the inner template.

6. A device for controlling the casting thickness of a box beam bottom plate according to claim 5, characterized in that: A connecting rod (5) is fixedly connected between two adjacent second support plates (441), and a third support plate (51) is fixedly connected to a side of the connecting rod (5) close to the inner template, and the third support plate (51) is used to abut against the fiber bundle (31) when the second support plate (441) abuts against the side wall of the inner template.

7. A device for controlling the casting thickness of a box beam bottom plate according to claim 6, characterized in that: A rubber layer (511) is fixedly connected to one side of the third support plate (51) close to the inner template side wall.

8. The control method of the control device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Fixing the inner template: fixedly connecting the support frame (1) to the outer template, and detachably connecting the inner template to the support frame (1) via the clamping assembly (2), so that the inner template is installed inside the outer template; Pulling the inner template: alternately inserting the fiber bundles (31) into the side walls of the inner template and the outer template, and tightening the fiber bundles (31); Fixing the fiber bundle (31): fixing the tensioned state of the fiber bundle (31) through the fixing portions (32) at both ends of the fiber bundle (31), so that the side walls of the inner and outer templates are in a tensioned state.

Images