A box beam template

Abstract

The present invention relates to the technical field of box girder formwork, and specifically to a box girder formwork, comprising a base, and a bottom formwork, a side formwork, an end formwork, an inner formwork and a moving vehicle installed on the base, wherein a plurality of side holes are arranged on both sides of the inner formwork, a forming tube is coaxially arranged in the side hole, a cavity is provided inside the forming tube, a sealing rod is arranged in the forming tube, the outer diameter of the sealing rod is the same as the inner diameter of the forming tube, and a driving unit for driving the forming tube to move along the axis of the side hole is arranged in the inner formwork; an inner plug hole which is in the same straight line as the axis of the side hole is arranged on the side of the side formwork facing the inner formwork, the inner diameter of the inner plug hole is the same as the outer diameter of the forming tube, a sealing block is slidably installed in the inner plug hole, and the sealing block is flush with the surface of the side formwork, and the technical scheme drives the forming tube to be inserted into the inner plug hole by a driving unit, and the forming tube is used for forming the ventilation hole of the box girder, and when the box girder needs to be demoulded, the forming tube can be driven by the driving unit to return to the inner formwork again, thereby reducing the difficulty of demoulding the box girder.

Description

Technical Field

[0001] The invention relates to the technical field of building box beam templates, in particular to a box beam template. Background Art

[0002] A type of beam in a box girder bridge project, which is hollow inside and has flanges on both sides of the upper part. It is named after its structure similar to a box body. It is mainly divided into single box and multiple boxes. The box beam of reinforced concrete structure is divided into prefabricated box beam and cast-in-place box beam. The existing prefabricated box beam formwork is generally divided into four parts: bottom formwork, side formwork, inner formwork, and end formwork. The side formwork is supported by hydraulic brackets, and the installation and demoulding of the inner formwork can also be operated by hydraulic rods. The bottom formwork is laid on the longitudinal beam, and the longitudinal beam is placed on the surface of the designed pedestal with sufficient rigidity.

[0003] Chinese patent CN111391082B discloses a box girder formwork for road and bridge construction, wherein the inner and outer molds of the formwork are provided with hollow rods for making vents, and a concrete vibrator is installed in the hollow rod to vibrate the concrete between the inner and outer molds again. However, the hollow rod and the vibrator of the device are fixed in position, which may cause impact to the concrete when pouring, and it is difficult to demould the box girder after it is formed. Summary of the invention

[0004] In view of the above problems, it is necessary to provide a box girder template for the existing technical problems.

[0005] In order to solve the problems of the prior art, the technical solution adopted by the present invention is:

[0006] A box girder formwork comprises a base, and a bottom formwork, a side formwork, an end formwork and an inner formwork installed on the base, the inner formwork is fixedly installed on a mobile vehicle, and the mobile vehicle is slidably installed on the base, a plurality of side holes are arranged on both sides of the inner formwork, a forming tube is coaxially arranged in the side hole, a cavity is provided inside the forming tube, a sealing rod is slidably arranged in the forming tube, the outer diameter of one end of the sealing rod close to the side formwork is the same as the inner diameter of the forming tube, and a driving unit for driving the forming tube to move along the axis of the side hole is arranged in the inner formwork; an inner plug hole which is in the same straight line as the axis of the side hole is arranged on the side of the side formwork facing the inner formwork, the inner diameter of the inner plug hole is the same as the outer diameter of the forming tube, the driving unit drives the forming tube to be inserted into the inner plug hole, and the forming tube is used for forming the vent hole of the box girder; a sealing block is slidably installed in the inner plug hole, the sealing block is flush with the surface of the side formwork, and the forming tube can press the sealing block to move along the axis of the inner plug hole into the inner plug hole.

[0007] Preferably, a center hole is provided at the axis of the blocking block, and a vibrating rod is provided at the center hole, and the vibrating rod can pass through the center hole and enter between the side mold and the inner mold; the side mold is installed on a mounting bracket, and a sliding frame is slidably installed on the mounting bracket, and a linear drive that drives the sliding frame to move along the axis direction of the inner hole, and the vibrating rod is fixedly installed on the sliding frame.

[0008] Preferably, a first spring is provided in the inner hole, and the first spring is provided between the inner wall of the inner hole and the blocking block, and the first spring applies elastic force to move the blocking block toward the inner mold; a limiting slide groove extending along the axis of the inner hole is provided at the bottom of the inner hole, and a limiting block is provided at the bottom end of the blocking block, and the limiting block is inserted in the limiting slide groove, and when the limiting block is attached to one end of the limiting slide groove toward the inner mold, the blocking block is flush with the surface of the side mold.

[0009] Preferably, the limiting slide groove is provided with a positioning hole extending downward at one end close to the inner mold, and a positioning block is slidably installed in the blocking block. When the limiting block is in contact with the end of the limiting slide groove facing the inner mold, the positioning block is inserted into the positioning hole under the action of gravity; an elastic pressure rod parallel to the axis of the insertion hole is slidably installed in the blocking block, and a second spring is sleeved on the elastic pressure rod. The elastic force of the second spring causes the elastic pressure rod to protrude from the side surface of the blocking block facing the inner mold, and an oblique insertion block is provided at the end of the elastic pressure rod away from the inner mold, and a first inclined surface is provided on the oblique insertion block, and the first inclined surface extends downwardly obliquely toward one end of the positioning block, and the positioning block is provided with an inclined slot on a side facing the oblique insertion block. When the elastic pressure rod moves toward the positioning block, the first inclined surface of the oblique insertion block moves in contact with the inclined slot and pushes the positioning block to move up and out of the positioning hole.

[0010] Preferably, an inner bracket is provided inside the inner mold, and a guide hole is provided on the inner bracket which is in the same straight line as the axis of the side hole. The forming tube and the sealing rod are inserted in the guide hole, and one end of the sealing rod located inside the inner mold extends to the outside of the forming tube and is fixedly mounted on the inner bracket.

[0011] Preferably, the driving unit includes clamping rollers arranged in parallel in groups of two, the clamping rollers are rotatably installed on the inner bracket along a horizontal direction perpendicular to the axis of the forming tube, the clamping rollers are located on the upper and lower sides of the outer wall of the forming tube to clamp the forming tube, and driving gears are coaxially installed at both ends of the clamping rollers, and the driving gears are meshed and connected to each other; the driving unit also includes a rotary driver fixedly installed on the inner bracket, and the rotary driver is transmission-connected to one end of one of the clamping rollers.

[0012] Preferably, a plurality of inner grooves are arranged on the circumference of the forming tube, the openings of the inner grooves are located on the surface of the forming tube, an elastic top block is slidably installed in the inner groove, a third spring is arranged in the elastic top block, the third spring elastically connects the bottom of the inner groove and the bottom of the elastic top block, the third spring exerts an elastic force on the elastic top block to protrude upward from the surface of the forming tube; a second inclined surface inclined toward the outer side of the inner mold is provided on the upper side of the elastic top block, the vertical side of the elastic top block fits against one side of the inner bracket so that the top end of the forming tube is flush with the surface of the inner mold, and when the second inclined surface of the elastic top block fits against the inner opening of the side hole, the elastic top block is pressed into the inner groove.

[0013] Preferably, a sealing ring is provided on the outer wall of the sealing rod, and the sealing ring is fitted to the inner wall of the molding tube.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] Firstly, the inner mold in the present invention is provided with side holes on both sides, which are blocked by the forming tube and the sealing rod inside the forming tube when pouring concrete, and the driving unit in the inner mold drives the forming tube to move toward the side mold, and the forming tube can form the vent holes of the box beam after the concrete solidifies. When the box beam needs to be demolded, the forming tube can return to the inner mold under the drive of the driving unit, thereby reducing the difficulty of demolding the box beam.

[0016] Secondly, the side mold in the present invention is provided with an inner hole which is in the same straight line as the axis of the side hole. The inner hole is usually blocked by a blocking block. The forming tube can be inserted into the inner hole to make the openings at both ends smooth after the vent hole is formed. The central hole of the blocking block can allow the vibrating rod to enter between the side mold and the inner mold to vibrate the concrete. The vibrating rod can perform multi-point vibration on the concrete in the template at the position where the vent hole of the box beam is formed, and can also be separated from the vent hole position of the box beam after the box beam is formed, so as to facilitate the demoulding of the box beam.

[0017] Thirdly, the positioning block in the present invention locks the position of the blocking block, and the pressure of the concrete in the template on the blocking block cannot push the blocking block to move in the inner hole. When the forming tube moves toward the blocking block, the position of the positioning block is moved by pressing the elastic pressure rod, so that the blocking block releases the position lock, and the forming tube is inserted into the inner hole to ensure the smoothness of the vent forming position. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of a box girder formwork in the first working state;

[0019] Figure 2 yes Figure 1 A local enlarged view of point A;

[0020] Figure 3 It is a top view of a box girder template in a first working state;

[0021] Figure 4 yes Figure 3 A cross-sectional view of the section at BB;

[0022] Figure 5 yes Figure 4 A partial enlarged view of point C;

[0023] Figure 6 yes Figure 4 A partial enlarged view of point D;

[0024] Figure 7 yes Figure 4 A local enlarged view of point E;

[0025] Figure 8It is a top view of a box girder formwork in the second working state;

[0026] Fig. 9 yes Figure 8 A cross-sectional view at FF of FIG.

[0027] Fig.10 yes Fig. 9 A partial enlarged view of point G.

[0028] The numbers in the figure are: 1, base; 2, bottom mold; 3, side mold; 31, inner plug hole; 311, first spring; 312, limit slide groove; 313, positioning hole; 32, blocking block; 321, center hole; 322, limit block; 323, positioning block; 324, elastic pressure rod; 325, second spring; 326, oblique plug block; 327, first inclined surface; 328, inclined surface slot; 33, vibrating rod; 34, mounting bracket; 3 41. Sliding frame; 342. Linear drive; 4. End mold; 5. Inner mold; 51. Side hole; 52. Forming tube; 521. Inner groove; 522. Elastic top block; 523. Third spring; 524. Second inclined surface; 53. Sealing rod; 531. Sealing ring; 54. Driving unit; 541. Clamping roller; 542. Driving gear; 543. Rotary drive; 55. Inner bracket; 551. Guide hole; 6. Moving vehicle. DETAILED DESCRIPTION

[0029] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Reference Figures 1 to 10 :

[0031] A box beam template comprises a base 1, and a bottom mold 2, a side mold 3, an end mold 4 and an inner mold 5 installed on the base 1. The inner mold 5 is fixedly installed on a moving vehicle 6, and the moving vehicle 6 is slidably installed on the base 1. A plurality of side holes 51 are arranged on both sides of the inner mold 5, and a forming tube 52 (such as Figure 5As shown), the forming tube 52 has a cavity inside, and a sealing rod 53 is slidably arranged inside the forming tube 52. The outer diameter of the sealing rod 53 at one end close to the side mold 3 is the same as the inner diameter of the forming tube 52. The inner mold 5 is provided with a driving unit 54 for driving the forming tube 52 to move along the axis of the side hole 51; the side mold 3 facing the inner mold 5 is provided with an inner plug hole 31 which is in the same straight line as the axis of the side hole 51, and the inner diameter of the inner plug hole 31 is the same as the outer diameter of the forming tube 52. The driving unit 54 drives the forming tube 52 to be inserted into the inner plug hole 31, and the forming tube 52 is used for forming the vent hole of the box beam; a sealing block 32 is slidably installed in the inner plug hole 31, and the sealing block 32 is flush with the surface of the side mold 3, and the forming tube 52 can press the sealing block 32 to move along the axis of the inner plug hole 31 to enter the inner plug hole 31.

[0032] When the box beam formwork of the present invention is in use, the staff assembles the bottom form 2, the side form 3 and the end form 4 on the base 1, and then moves the mobile car 6 horizontally. The mobile car 6 drives the inner form 5 to horizontally pass through the end form 4 and enter the side form 3. After the assembly is completed, concrete is poured into the formwork to form a box beam. In this embodiment, in order to allow ventilation holes to exist on the formed box beam, thereby preventing the box beam from being damaged by excessive temperature difference between the inside and the outside due to the hydration heat reaction of concrete or sudden change of external temperature, side holes 51 are provided on both sides of the inner form 5 in this embodiment. When pouring concrete, the side holes 51 are blocked by the forming tube 52 and the sealing rod 53 inside the forming tube 52 to ensure that the surface of the inner form 5 is smooth. When the concrete is poured, After completion, the driving unit 54 in the inner mold 5 drives the forming tube 52 to move toward the side mold 3. The side mold 3 is provided with an inner hole 31 which is in the same straight line as the side hole 51. The inner hole 31 is blocked by the blocking block 32 during concrete pouring to ensure that the surface of the side mold 3 is neat. When the forming tube 52 moves to the inner hole 31, the forming tube 52 can push the blocking block 32 to move into the inner hole 31, so that the forming tube 52 is inserted into the inner hole 31. The forming tube 52 can form the air vent of the box girder after the concrete solidifies, and the openings at both ends of the air vent are smooth after the formation. When the box girder needs to be demolded, the forming tube 52 can return to the inner mold 5 under the drive of the driving unit 54, thereby reducing the difficulty of demolding the box girder.

[0033] In order to solve the problem of how to vibrate the concrete in the formwork after pouring, the following features are specifically set:

[0034] A center hole 321 is provided at the axis of the blocking block 32, and a vibrating rod 33 is provided at the center hole 321. The vibrating rod 33 can pass through the center hole 321 and enter between the side mold 3 and the inner mold 5; the side mold 3 is installed on a mounting bracket 34, and a sliding frame 341 and a linear driver 342 that drives the sliding frame 341 to move along the axis direction of the inner socket 31 are slidably installed on the mounting bracket 34, and the vibrating rod 33 is fixedly installed on the sliding frame 341.

[0035] In this embodiment, a center hole 321 is provided at the center of the blocking block 32. The vibrating rod 33 can extend through the center hole 321 to between the side mold 3 and the inner mold 5 to vibrate the concrete. The vibrating rod 33 can cooperate with the rubber ring to seal the center hole 321 to prevent the concrete from passing through the center hole 321 and causing leakage. After the vibrating rod 33 is vibrated, the driving unit 54 drives the forming tube 52 to move into the inner plug hole 31, and the sealing rod 53 is guaranteed to be immovable, so that the inner cavity of the forming tube 52 can avoid the vibrating rod 33. After the forming tube 52 is inserted into the inner plug hole 31, the vibrating rod 33 is located in the inner cavity of the forming tube 52. When the box needs to be vibrated When the beam is demoulded, the linear drive 342 on the mounting bracket 34 is started. The linear drive 342 drives the sliding frame 341 connected to all the vibrating rods 33 to move along the axis of the center hole 321, so that the vibrating rods 33 enter the inside of the side mold 3, which is convenient for the subsequent demoulding of the box beam. The linear drive 342 in this embodiment can be a hydraulic cylinder, a pneumatic cylinder or an electric push rod, etc. The linear drive 342 drives the vibrating rod 33 to change its position to ensure that the vibrating rod 33 can perform multi-point vibration on the concrete in the template at the position where the vent holes of the box beam are formed, and can also be detached from the vent holes of the box beam after the box beam is formed, which is convenient for demoulding the box beam.

[0036] In order to solve the problem of how to ensure that the blocking block 32 is flush with the surface of the side mold 3 when blocking the inner insertion hole 31, the following features are specifically set:

[0037] A first spring 311 is arranged in the inner hole 31, and the first spring 311 elastically connects the inner wall of the inner hole 31 and the blocking block 32, and the first spring 311 applies elastic force to move the blocking block 32 toward the inner mold 5; a limiting groove 312 extending along the axis of the inner hole 31 is arranged at the bottom of the inner hole 31, and a limiting block 322 is arranged at the bottom of the blocking block 32, and the limiting block 322 is inserted in the limiting groove 312. When the limiting block 322 fits the limiting groove 312 toward one end of the inner mold 5, the blocking block 32 is flush with the surface of the side mold 3.

[0038] The blocking block 32 in this embodiment is moved toward the side close to the inner mold 5 by the elastic force of the first spring 311 in the inner hole 31. At this time, the limit block 322 at the bottom end of the blocking block 32 moves in the limit slide groove 312 below the inner hole 31 until the limit block 322 is fitted with one end of the limit slide groove 312. By setting the length of the limit slide groove 312, it can be ensured that when the limit block 322 is fitted with the limit slide groove 312, the surface of the blocking block 32 is flush with the surface of the side mold 3, ensuring that concrete will not accumulate at the joint between the inner hole 31 and the blocking block 32 after entering the template, and also ensuring the effect of vibration. After the forming tube 52 is fitted with the blocking block 32, it pushes the blocking block 32 into the inner hole 31. At this time, the first spring 311 is in a compressed state.

[0039] In order to solve the problem of how to prevent the pressure of concrete from causing the blocking block 32 to move into the inner insertion hole 31, the following features are specifically set:

[0040] The end of the limiting slide groove 312 close to the inner mold 5 is provided with a positioning hole 313 extending downward, and the blocking block 32 is slidably installed with a positioning block 323. When the limiting block 322 fits the limiting slide groove 312 toward the end of the inner mold 5, the positioning block 323 is inserted into the positioning hole 313 under the action of gravity; an elastic pressure rod 324 parallel to the axis of the insertion hole 31 is slidably installed in the blocking block 32, and a second spring 325 is sleeved on the elastic pressure rod 324. The elastic force of the second spring 325 makes the elastic pressure rod 324 protrude from the blocking block On one side surface of 32 facing the inner mold 5, an end of the elastic pressure rod 324 away from the inner mold 5 is provided with an inclined block 326, and a first inclined surface 327 is provided on the inclined block 326. The first inclined surface 327 extends downwardly toward one end of the positioning block 323, and the positioning block 323 is provided with an inclined surface groove 328 on the side facing the inclined block 326. When the elastic pressure rod 324 moves toward the positioning block 323, the first inclined surface 327 of the inclined block 326 moves in contact with the inclined surface groove 328 and pushes the positioning block 323 to move up and out of the positioning hole 313.

[0041] The positioning block 323 is slidably installed at the bottom of the blocking block 32 in this embodiment. The positioning block 323 is located in the hole inside the blocking block 32 when the blocking block 32 moves. When the limit block 322 of the blocking block 32 moves to one end of the limit slide groove 312, the positioning block 323 and the positioning hole 313 at one end of the limit slide groove 312 are in the same straight line. Then the positioning block 323 falls into the positioning hole 313 under the action of gravity. The positioning block 323 locks the position of the blocking block 32. The pressure of the concrete in the template on the blocking block 32 cannot push the blocking block 32 to move in the inner plug hole 31. When the forming tube 52 moves toward the blocking block 32, the top of the forming tube 52 preferentially contacts the elastic pressure rod 33 protruding from the surface of the blocking block 32 24. Before pushing the blocking block 32 to move, the forming tube 52 presses the elastic pressure rod 324 to move into the blocking block 32. When the elastic pressure rod 324 moves, it drives the oblique insertion block 326 at the other end to move. The first inclined surface 327 of the oblique insertion block 326 is located in the inclined surface groove 328 of the positioning block 323. When the first inclined surface 327 of the oblique insertion block 326 moves in contact with the inclined surface groove 328, the oblique insertion block 326 pushes the positioning block 323 to move up until it is out of the positioning hole 313. Then the forming tube 52 contacts the blocking block 32 again. At this time, the blocking block 32 releases the position lock and can move into the inner hole 31 with the movement of the forming tube 52, so that the forming tube 52 is inserted into the inner hole 31 to ensure the smoothness of the vent forming position.

[0042] In order to solve the problem of how to ensure that the sealing rod 53 remains in position when the forming tube 52 moves, the following features are specifically provided:

[0043] The inner mold 5 is provided with an inner support 55, and the inner support 55 is provided with a guide hole 551 (such as Figure 7 ), the forming tube 52 and the sealing rod 53 are inserted into the guide hole 551, and one end of the sealing rod 53 located inside the inner mold 5 extends to the outside of the forming tube 52 and is fixedly mounted on the inner bracket 55.

[0044] In this embodiment, an inner bracket 55 is provided inside the inner mold 5, and the inner mold 5 is installed on the moving vehicle 6 through the inner bracket 55. The inner bracket 55 is provided with a plurality of guide holes 551 which are in the same straight line with the side hole 51. The forming tube 52 and the sealing rod 53 inserted in the side hole 51 are also installed in the guide holes 551. One end of the sealing rod 53 extends to the outside of the forming tube 52 and is fixedly installed on the inner bracket 55 to ensure that the position of the sealing rod 53 is fixed. The forming tube 52 can move on the sealing rod 53, and the sealing rod 53 is always kept flush with the outer surface of the inner mold 5.

[0045] In order to solve the problem of how the driving unit 54 drives the forming tube 52 to move on the sealing rod 53, the following features are specifically set:

[0046] The driving unit 54 includes clamping rollers 541 arranged in parallel in groups of two. The clamping rollers 541 are rotatably installed on the inner bracket 55 along the horizontal direction perpendicular to the axis of the forming tube 52. The clamping rollers 541 are located on the upper and lower sides of the outer wall of the forming tube 52 to clamp the forming tube 52. Driving gears 542 are coaxially installed at both ends of the clamping rollers 541, and the driving gears 542 are meshed and connected with each other. The driving unit 54 also includes a rotating driver 543 fixedly installed on the inner bracket 55, and the rotating driver 543 is transmission-connected to one end of one of the clamping rollers 541.

[0047] The driving unit 54 in this embodiment clamps the outer wall of the forming tube 52 through a group of two clamping rollers 541. When the clamping rollers 541 rotate, the forming tube 52 can be moved along the axis of the side hole 51, so that the forming tube 52 is inserted into the concrete and moves toward the inner insertion hole 31 of the side mold 3, and the forming tube 52 moves in the opposite direction to be demolded. The two ends of the clamping rollers 541 rotate on the inner bracket 55. The conveying method of the clamping rollers 541 can realize the stable movement of a forming tube 52 of any length outside the sealing rod 53. The driving gears 542 coaxially connected at both ends of the clamping rollers 541 in this embodiment are meshed with each other, so that the clamping rollers 541 located on both sides of the forming tube 52 can rotate synchronously in the opposite direction, thereby realizing the movement of the forming tube 52. The driving unit 54 in this embodiment drives one of the two transmission-connected clamping rollers 541 to rotate through the rotating driver 543, and the rotating driver 543 can be a servo motor.

[0048] In order to solve the problem of how to remove the concrete that enters the forming tube 52 when the forming tube 52 moves toward the inner insertion hole 31, the following features are specifically provided:

[0049] The outer wall of the sealing rod 53 is provided with a sealing ring 531 , and the sealing ring 531 is attached to the inner wall of the molding tube 52 .

[0050] During the resetting process of the forming tube 52 in this embodiment, the outer wall of the sealing rod 53 moves in contact with the inner wall of the forming tube 52, and the sealing rod 53 discharges impurities that may be attached to the inner wall of the forming tube 52 into the forming tube 52. The sealing ring 531 arranged on the peripheral side of the outer wall of the sealing rod 53 ensures complete contact with the inner wall of the forming tube 52, thereby improving the cleaning effect.

[0051] In order to solve the problem of how to ensure that the top end of the forming tube 52 remains flush with the surface of the inner mold 5 after the driving unit 54 drives the forming tube 52 to reset, the following features are specifically set:

[0052] A plurality of inner grooves 521 are arranged on the circumference of the forming tube 52, and the openings of the inner grooves 521 are located on the surface of the forming tube 52. An elastic top block 522 is slidably installed in the inner groove 521, and a third spring 523 is arranged in the elastic top block 522. The third spring 523 elastically connects the bottom of the inner groove 521 and the bottom of the elastic top block 522, and the third spring 523 exerts an elastic force on the elastic top block 522 to protrude upward from the surface of the forming tube 52; a second inclined surface 524 inclined toward the outer side of the inner mold 5 is arranged on the upper side of the elastic top block 522, and the vertical side of the elastic top block 522 is in contact with one side of the inner bracket 55 so that the top end of the forming tube 52 is flush with the surface of the inner mold 5, and when the second inclined surface 524 of the elastic top block 522 is in contact with the inner opening of the side hole 51, the elastic top block 522 is pressed into the inner groove 521.

[0053] When the driving unit 54 drives the molding tube 52 to return to its original position, the elastic top block 522 can be compressed by the third spring 523 to enter the inner groove 521 to ensure the movement of the molding tube 52. When the driving unit 54 drives the molding tube 52 to return to its original position, the elastic top block 522 can be released from the guide hole 551 and can be reset to protrude from the surface of the molding tube 52 by the elastic force of the third spring 523, thereby restoring the positioning effect on the molding tube 52 in the subsequent movement.

[0054] Working principle: When in use, the staff assembles the bottom mold 2, the side mold 3 and the end mold 4 on the base 1, and then moves the mobile car 6 horizontally. The mobile car 6 drives the inner mold 5 to horizontally pass through the end mold 4 and enter the inside of the side mold 3. After the assembly is completed, concrete is poured into the mold. The side mold 3 is provided with an inner plug hole 31, and the inner plug hole 31 is blocked by the blocking block 32. The vibrating rod 33 extends through the central hole 321 of the blocking block 32 to between the side mold 3 and the inner mold 5 to vibrate the concrete. Side holes 51 are provided on both sides of the inner mold 5. When pouring concrete, the side holes 51 are connected by the forming tube 52 and the forming tube 53. The sealing rod 53 inside 52 is sealed. When the concrete is vibrated, the driving unit 54 in the inner mold 5 drives the forming tube 52 to move toward the side mold 3. When the forming tube 52 moves to the inner plug hole 31, it pushes the blocking block 32 to move into the inner plug hole 31, so that the forming tube 52 is inserted into the inner plug hole 31. The forming tube 52 can form the vent hole of the box beam after the concrete solidifies. When the box beam needs to be demolded, the forming tube 52 can return to the inner mold 5 under the drive of the driving unit 54, and the vibrating rod 33 is separated from the box beam under the drive of the linear drive 342, and the box beam is demolded.

Claims

1. A box beam formwork, comprising a base (1), and a bottom form (2), a side form (3), and an end form (4) mounted on the base (1), wherein an inner form (5) is fixedly mounted on a moving vehicle (6), and the moving vehicle (6) is slidably mounted on the base (1), characterized in that: A plurality of side holes (51) are provided on both sides of the inner mold (5), a forming tube (52) is coaxially provided in the side hole (51), the forming tube (52) has a cavity inside, a sealing rod (53) is slidably provided in the forming tube (52), the outer diameter of one end of the sealing rod (53) close to the side mold (3) is the same as the inner diameter of the forming tube (52), and a driving unit (54) is provided in the inner mold (5) for driving the forming tube (52) to move along the axis of the side hole (51); The side mold (3) facing the inner mold (5) is provided with an inner insertion hole (31) which is in the same straight line as the axis of the side hole (51); the inner diameter of the inner insertion hole (31) is the same as the outer diameter of the forming tube (52); the driving unit (54) drives the forming tube (52) to be inserted into the inner insertion hole (31); the forming tube (52) is used to form the vent holes of the box beam; A blocking block (32) is slidably mounted in the inner plug hole (31), the blocking block (32) being flush with the surface of the side mold (3), and the molding tube (52) can press the blocking block (32) to move along the axis of the inner plug hole (31) into the inner plug hole (31); A first spring (311) is arranged in the inner plug hole (31), and the first spring (311) is arranged between the inner wall of the inner plug hole (31) and the blocking block (32); The bottom of the inner plug hole (31) is provided with a limiting slide groove (312) extending along the axis of the inner plug hole (31), and the bottom end of the blocking block (32) is provided with a limiting block (322), and the limiting block (322) is inserted into the limiting slide groove (312). When the limiting block (322) is attached to one end of the limiting slide groove (312) facing the inner mold (5), the blocking block (32) is flush with the surface of the side mold (3); A positioning hole (313) extending downward is provided at one end of the limiting slide groove (312) close to the inner mold (5), and a positioning block (323) is slidably installed in the blocking block (32). When the limiting block (322) is attached to one end of the limiting slide groove (312) facing the inner mold (5), the positioning block (323) is inserted into the positioning hole (313) under the action of gravity; An elastic pressure rod (324) parallel to the axis of the insertion hole (31) is slidably installed in the blocking block (32), and a second spring (325) is sleeved on the elastic pressure rod (324). The elastic force of the second spring (325) causes the elastic pressure rod (324) to protrude from a side surface of the blocking block (32) facing the inner mold (5). An oblique insertion block (326) is provided at one end of the elastic pressure rod (324) away from the inner mold (5). The oblique insertion block (326) is provided with a first An inclined surface (327), wherein the first inclined surface (327) extends downwardly at an angle toward one end of the positioning block (323), and an inclined surface groove (328) is provided on one side of the positioning block (323) toward the oblique insertion block (326); when the elastic pressure rod (324) moves toward the positioning block (323), the first inclined surface (327) of the oblique insertion block (326) moves in contact with the inclined surface groove (328) and pushes the positioning block (323) to move upward and away from the positioning hole (313); An inner bracket (55) is provided inside the inner mold (5), and a guide hole (551) is provided on the inner bracket (55) and is in a straight line with the axis of the side hole (51). The molding tube (52) and the sealing rod (53) are inserted into the guide hole (551), and one end of the sealing rod (53) located inside the inner mold (5) extends to the outside of the molding tube (52) and is fixedly mounted on the inner bracket (55); The driving unit (54) comprises clamping rollers (541) arranged in parallel in groups of two, the clamping rollers (541) being rotatably mounted on the inner bracket (55) in a horizontal direction perpendicular to the axis of the forming tube (52), the clamping rollers (541) being located on the upper and lower sides of the outer wall of the forming tube (52) to clamp the forming tube (52), and drive gears (542) being coaxially mounted at both ends of the clamping rollers (541), and the drive gears (542) being meshed and connected with each other; The driving unit (54) further comprises a rotary driver (543) fixedly mounted on the inner bracket (55), wherein the rotary driver (543) is drivingly connected to one end of one of the clamping rollers (541).

2. A box beam formwork according to claim 1, characterized in that: The blocking block (32) is provided with a central hole (321) at the axis thereof, and a vibrating rod (33) is provided at the central hole (321), and the vibrating rod (33) can pass through the central hole (321) and enter between the side mold (3) and the inner mold (5); The side mold (3) is mounted on a mounting bracket (34), a sliding frame (341) and a linear driver (342) for driving the sliding frame (341) to move along the axis direction of the inner plug hole (31) are slidably mounted on the mounting bracket (34), and a vibrating rod (33) is fixedly mounted on the sliding frame (341).

3. A box beam formwork according to claim 1, characterized in that: A plurality of inner grooves (521) are arranged on the circumference of the forming tube (52), the openings of the inner grooves (521) are located on the surface of the forming tube (52), an elastic top block (522) is slidably installed in the inner grooves (521), a third spring (523) is arranged in the elastic top block (522), the third spring (523) elastically connects the bottom of the inner groove (521) and the bottom of the elastic top block (522), and the third spring (523) exerts an elastic force on the elastic top block (522) to protrude upward from the surface of the forming tube (52); The upper side of the elastic top block (522) is provided with a second inclined surface (524) inclined toward the outer side of the inner mold (5); the vertical side of the elastic top block (522) is in contact with one side of the inner bracket (55) so that the top end of the forming tube (52) is flush with the surface of the inner mold (5); when the second inclined surface (524) of the elastic top block (522) is in contact with the inner opening of the side hole (51), the elastic top block (522) is pressed into the inner groove (521).

4. A box beam formwork according to claim 1, characterized in that: The outer wall of the sealing rod (53) is provided with a sealing ring (531), and the sealing ring (531) is attached to the inner wall of the molding tube (52).

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