Double-hoop type bent cap bottom die construction device

Abstract

The invention belongs to the technical field of bridge engineering capping beam construction, and particularly relates to a double-hoop type capping beam bottom die construction device which comprises a sand cylinder, the sand cylinder is located between an upper hoop and a lower hoop, and the sand cylinder comprises a cylindrical part and a columnar part; the columnar part is arranged in the barrel-shaped part in a sleeved mode, the columnar part can axially slide in the barrel-shaped part, the barrel-shaped part can be filled with sand to support the columnar part, and the columnar part can support the upper hoop; a discharging opening capable of being closed is formed in the bottom end of the columnar part, when the discharging opening is in a closed state, sand can be prevented from flowing out of the barrel-shaped part, and when the discharging opening is in an open state, the columnar part extrudes downwards to discharge the sand from the discharging opening. The construction method has the advantage that the construction safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pier cap construction in bridge engineering; specifically, the present invention relates to a double-hoop type pier cap bottom formwork construction device. Background Art

[0002] The pier cap is an important part of the lower structure of a bridge, connecting the bridge pier and supporting the upper beam body. As the load-bearing formwork for pouring pier cap concrete, the construction quality of the bottom formwork directly affects the geometric dimensions, elevation, and safety of the pier cap. The construction of the pier cap bottom formwork is the key and difficult point in bridge engineering construction, and whether its construction process can ensure quality and safety directly affects the construction progress of the entire bridge project.

[0003] The existing hoop type pier cap bottom formwork is a scaffold-free support technology. By installing high-strength steel hoops on the pier column and using friction to provide the support force, it is suitable for the construction of pier caps of circular piers. Its advantages are saving scaffold materials, fast construction, and strong adaptability, especially suitable for working conditions where it is not suitable to erect scaffolds across roads, rivers, etc. However, since the hoop is in direct contact with the formwork, it is necessary to first remove the formwork at a high place before the hoop can be removed, resulting in greater danger and inconvenience in high-altitude construction. Summary of the Invention

[0004] In view of this, the present invention provides a double-hoop type pier cap bottom formwork construction device, thereby solving or at least alleviating the above problems existing in the prior art.

[0005] To achieve the foregoing purpose, the present invention provides a double-hoop type pier cap bottom formwork construction device, including a sand cylinder, and the sand cylinder is located between the upper hoop and the lower hoop. The sand cylinder includes a cylindrical part and a columnar part;

[0006] The columnar part is sleeved inside the cylindrical part, and the columnar part can axially slide inside the cylindrical part. The inside of the cylindrical part can be filled with sand to support the columnar part, and the columnar part can support the upper hoop;

[0007] The bottom end of the columnar part is provided with a discharge opening that can be closed. When the discharge opening is in a closed state, it can prevent the sand from flowing out of the cylindrical part. When the discharge opening is in an open state, the columnar part presses downward to discharge the sand from the discharge opening.

[0008] In a double-hoop type pier cap bottom formwork construction device as described above, optionally, it further includes:

[0009] A suspension part, which can be suspended at the bolt of the upper hoop and descends synchronously with the upper hoop;

[0010] Two support arms are located below the suspension part and are connected to the suspension part. The two support arms are symmetrically distributed along the axial direction of the pier column. When the suspension part descends and the support arms are blocked, the support arms move synchronously until they abut against both sides of the upper hoop, so as to align the upper hoop with the pier column.

[0011] A stop block is provided on each of the opposite surfaces of the two support arms. The stop block can be telescoped within the support arm.

[0012] A U-shaped frame is connected to the cylindrical part and is located between two adjacent sand cylinders. Teeth are evenly installed on both sides of the opening of the U-shaped frame. The teeth are in an inverted trapezoid shape. When the stop block is in a contracted state, the stop block can be blocked by the top surface of the teeth, so that the two support arms can move synchronously. When the stop block is in an extended state, the stop block can fall off from the top surface of the teeth, so that the two support arms drop downward.

[0013] There are two core rods, which are respectively sleeved inside the two support arms. The core rod can slide in the length direction of the support arm. The top end of the core rod can abut against the side surface of the upper hoop. The bottom end of the core rod is in sliding fit with the stop block, so as to control the telescoping of the stop block.

[0014] A first spring is located between the support arm and the core rod, and is used to drive the core rod to drive the stop block to move to a contracted state when the support rod descends.

[0015] When the support arm is supported on the teeth by the stop block and the suspension part continues to descend, the two support arms can be driven to move synchronously until they abut against both sides of the upper hoop.

[0016] In a double-hoop type cover beam bottom form construction device as described above, optionally, the suspension part includes a hook, a swing rod and an upper moving rod. There are two hooks, and the two hooks are respectively arranged at both ends of the upper moving rod. The hook can be hung on the bolt of the upper hoop for hanging the support arm.

[0017] A swing rod is provided at each end of the upper moving rod. The top end of the swing rod is rotatably fitted with the upper moving rod, and the bottom end of the swing rod is rotatably fitted with the corresponding support arm.

[0018] A lower moving rod is provided between the bottom ends of the two support rods. The two support rods are respectively rotatably installed at both ends of the lower moving rod. The stop block includes an inclined block and a moving block. Both the inclined block and the moving block are sleeved outside the lower moving rod. The inclined block is rotatably connected to the moving block.

[0019] The bottom end of the core rod is provided with an inclined surface. The inclined surface of the core rod corresponds to the inclined surface of the inclined block, and the inclined block slides on the inclined surface. The moving block can contact the top surface of the teeth.

[0020] In a double-hoop type cover beam bottom form construction device as described above, optionally, it further includes:

[0021] A connecting pipe, located at the bottom ends of two adjacent cylindrical parts and communicating with the cylindrical parts, and a baffle is fixedly installed at the inner center of the connecting pipe;

[0022] A fixing sleeve, sleeved outside the U-shaped frame and fixedly connected with the cylindrical part, and the U-shaped frame can be slidably matched with the fixing sleeve in its length direction for connecting the U-shaped frame and the cylindrical part;

[0023] Two sealing plates, respectively slidably arranged inside the two ends of the connecting pipe, capable of controlling the opening and closing of the discharge port;

[0024] A moving plate, one is provided corresponding to each sealing plate, and the two moving plates are both arranged between the two sealing plates. The moving plate is connected with the sealing plate on its same side for driving the sealing plate to move;

[0025] A top block, one group is provided corresponding to each sealing plate. The top block is fixedly connected with the sealing plate on its same side. The opposite surfaces of the two groups of top blocks are both set as inclined surfaces. When the sealing plate is located in the middle area of the discharge port, the inclined surface of the top block can contact with the bottom end of the U-shaped frame.

[0026] In a double-hoop type bottom formwork construction device for a bent cap as described above, optionally, further comprising:

[0027] Two second springs, two are provided corresponding to the two sealing plates, and the two second springs are symmetrically distributed with respect to the midline of the sealing plate. The two ends of the second spring are respectively connected with the sealing plate and the moving plate, capable of providing a buffering stroke for the movement of the inclined block to realize the buffering of the U-shaped frame;

[0028] A limiting rod, one is provided corresponding to each of the two moving plates. The limiting rod is arranged at the center of the moving plate and faces the sealing plate on its same side for limiting the minimum distance between the sealing plate and the moving plate.

[0029] In a double-hoop type bottom formwork construction device for a bent cap as described above, optionally, further comprising:

[0030] A screw sleeve, one is provided corresponding to each of the two moving plates. The screw sleeve is located outside the connecting pipe, and the screw sleeve is fixedly connected with the corresponding moving plate for driving the moving plate to move;

[0031] A bidirectional threaded rod, rotatably arranged outside the connecting pipe, and the two ends of the bidirectional threaded rod are respectively threadedly connected with the two screw sleeves for driving the relative movement of the screw sleeves;

[0032] A rotating head, fixedly installed in the middle area of the bidirectional threaded rod for driving the bidirectional threaded rod to rotate.

[0033] In a double - hoop type cover beam bottom form construction device as described above, optionally, there are two U - shaped frames. Inverted L - shaped grooves are formed on both sides of the fixed sleeve, and the horizontal grooves of the two L - shaped grooves correspond to each other. A sliding block capable of sliding in the L - shaped groove is fixedly installed on the U - shaped frame. When the sliding block is located in the horizontal groove, the two U - shaped frames can support the stop block and hold the support arm in the highest position. When the sliding block is located in the vertical groove, the two U - shaped frames can form a channel for the stop block to fall. The stop block fits with the channel, and the U - shaped frame can slide in the length direction in cooperation with the fixed sleeve.

[0034] In a double - hoop type cover beam bottom form construction device as described above, optionally, the inclined block corresponds to the U - shaped frame on its different side. When the sealing plate is opened, the inclined block drives the sliding block to move from the end of the horizontal groove to the connection with the vertical groove.

[0035] In a double - hoop type cover beam bottom form construction device as described above, optionally, extension plates are fixedly installed on both sides of the top of the fixed sleeve. The moving block is T - shaped, and both ends of the moving block are in contact with the extension plates, which can maintain the stability when the support arm descends. The top of the moving block is provided with an inclined surface, which corresponds to the inclined surface of the tooth, so as to realize the insertion of the moving block between the upper and lower teeth.

[0036] The present invention has at least the following beneficial effects:

[0037] 1. By providing a sand cylinder between the upper hoop and the lower hoop, with sand filled inside the sand cylinder, and the columnar part of the sand cylinder abutting against the lower part of the upper hoop, it can provide a supporting force for the upper hoop when installing the upper hoop, facilitating the improvement of the installation accuracy of the upper hoop. And when disassembling, open the discharge port of the sand cylinder, then loosen the upper hoop, and leak the fine sand in the sand cylinder to control the falling speed of the cover beam bottom form, improving the construction safety.

[0038] 2. By hanging a support arm on the upper hoop, and there is a U - shaped frame below the support arm, it can be realized that when the upper hoop descends, it drives the support arm to contact with the U - shaped frame, making the support arm move synchronously, centering the upper hoop with the pier column, preventing the upper hoop from rubbing against the pier column for a long time when it is eccentric. And by elastically installing a stop block on the support arm, when the support arm drives the upper hoop to be centered with the pier column, the stop block can fall from the U - shaped frame and be subjected to an elastic force, and can contact with the U - shape again, realizing the gradual descent of the upper hoop and improving the construction safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Referring to the attached drawings, the disclosure of the present invention will be more obvious. It should be understood that these drawings are only for the purpose of illustration and are not intended to limit the protection scope of the present invention. In the figures:

[0040] Figure 1Installation schematic diagram of Embodiment 1 of the present invention;

[0041] Figure 2 Installation schematic diagram of Embodiment 2 of the present invention;

[0042] Figure 3 Structural schematic diagram of Embodiment 2 of the present invention;

[0043] Figure 4 Internal structural schematic diagram of the connecting pipe of Embodiment 2 of the present invention;

[0044] Figure 5 Connecting structure schematic diagram of the suspension part, support arm, stop block and U-shaped frame of Embodiment 2 of the present invention;

[0045] Figure 6 Internal structural schematic diagram of the support arm of Embodiment 2 of the present invention;

[0046] Figure 7 Connecting structure schematic diagram of the inclined block and the moving block of Embodiment 2 of the present invention;

[0047] Figure 8 Connecting structure schematic diagram of the sealing plate, top block and U-shaped frame of Embodiment 2 of the present invention.

[0048] Reference numerals: 1, sand cylinder; 1-1, cylindrical part; 1-2, columnar part; 1-3, discharge port; 2, support arm; 2-1, lower moving rod; 3, suspension part; 3-1, hook; 3-2, swing rod; 3-3, upper moving rod; 4, stop block; 4-1, inclined block; 4-2, moving block; 5, U-shaped frame; 5-1, teeth; 5-2, sliding block; 6, core rod; 7, first spring; 8, connecting pipe; 8-1, baffle; 8-2, first chute; 8-3, second chute; 9, fixed sleeve; 9-1, L-shaped groove; 9-2, extension plate; 10, sealing plate; 10-1, connecting rod; 11, moving plate; 11-1, shielding plate; 12, top block; 13, second spring; 14, limiting rod; 15, screw sleeve; 16, bidirectional threaded rod; 16-1, rotating head. Detailed implementation manners

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0050] As Figure 1 shown, in Embodiment 1, a double-hoop type capping beam bottom formwork construction device includes a sand cylinder 1, and the sand cylinder 1 is located between the upper hoop and the lower hoop. The sand cylinder 1 includes a cylindrical part 1-1 and a columnar part 1-2;

[0051] The columnar part 1-2 is sleeved inside the cylindrical part 1-1, and the columnar part 1-2 can axially slide inside the cylindrical part 1-1. Sand can be filled inside the cylindrical part 1-1 to support the columnar part 1-2, and the columnar part 1-2 can support the upper hoop.

[0052] A discharge opening 1-3 that can be closed is provided at the bottom end of the columnar part 1-2. When the discharge opening 1-3 is in a closed state, it can prevent sand from flowing out of the cylindrical part 1-1. When the discharge opening 1-3 is in an open state, the columnar part 1-2 squeezes downward to discharge the sand from the discharge opening 1-3.

[0053] In a relatively specific embodiment for controlling the opening and closing of the discharge opening 1-3, a bolt is threadedly connected inside the discharge opening 1-3. When the bolt is inserted into the discharge opening 1-3, it can block the discharge opening 1-3 to prevent sand from flowing out. When the bolt disengages from the discharge opening 1-3, the sand flows out.

[0054] During actual use, during installation, a crane is used to fixedly install the lower hoop on the outer surface of the pier column, and the sand cylinder 1 is fixedly installed on the top ear of the lower hoop. The bolt is inserted into the discharge opening 1-3. At this time, sand is poured into the cylindrical part 1-1, and the columnar part 1-2 is inserted into the cylindrical part 1-1 and the sand is compacted. At this time, the top surface height of the columnar part 1-2 can be finely adjusted by adjusting the sand capacity inside the cylindrical part 1-1. When the top surface height of the columnar part 1-2 is adjusted to an appropriate height, the crane is used again to place the upper hoop on the top surface of the columnar part 1-2. At this time, the columnar part 1-2 is under the pressure of the upper hoop, and can press the sand inside the cylindrical part 1-1 more densely and support the upper hoop to assist in the installation of the upper hoop.

[0055] After the upper hoop is installed, the I-beams are installed on both sides of the top of the upper steel hoop, and another group of I-beams is welded vertically on the top of the already installed I-beams to form a cross beam. After safety inspection, the formwork and support system are installed on the cross beam, and the steel bar binding and concrete pouring operations are carried out.

[0056] During disassembly, after the concrete strength is greater than 80% of the design strength, first let the bolt fall off from the discharge opening 1-3 to leak the fine sand in the sand cylinder 1, then loosen the upper hoop to let it freely and slowly drop, so that the bottom formwork is separated from the concrete surface, and then the cross beam I-beams and longitudinal beam I-beams are removed. Finally, the upper hoop, lower hoop and sand cylinder 1 are removed to complete the operation.

[0057] As Figures 2 to 8 shown, in the second embodiment, the double-hoop type cover beam bottom formwork construction device further includes:

[0058] A suspension part 3 that can be suspended at the bolt of the upper hoop and descends synchronously with the upper hoop.

[0059] Two support arms 2 are located below the suspension part 3 and are connected to the suspension part 3. The two support arms 2 are symmetrically distributed along the axial direction of the pier column. When the suspension part 3 descends and the support arms 2 are blocked, the support arms 2 move synchronously to abut against both sides of the upper hooping, so as to center the upper hooping with the pier column.

[0060] A stop block 4 is provided on each of the opposite surfaces corresponding to the two support arms 2, and the stop block 4 can telescopically move within the support arm 2.

[0061] A U-shaped frame 5 is connected to the cylindrical part 1-1 and is located between two adjacent sand cylinders 1. Tooth teeth 5-1 are evenly installed on both sides of the opening of the U-shaped frame 5. The tooth teeth 5-1 are in an inverted trapezoidal shape. When the stop block 4 is in a contracted state, the stop block 4 can be blocked by the top surface of the tooth teeth 5-1 to realize synchronous movement of the two support arms 2. When the stop block 4 is in an extended state, the stop block 4 can fall off from the top surface of the tooth teeth 5-1 to realize downward dropping of the two support arms 2.

[0062] There are two core rods 6, which are respectively sleeved inside the two support arms 2. The core rods 6 can slide in the length direction of the support arms 2. The top ends of the core rods 6 can abut against the side surfaces of the upper hooping, and the bottom ends of the core rods 6 are in sliding fit with the stop block 4 to control the telescopic movement of the stop block 4.

[0063] A first spring 7 is located between the support arm 2 and the core rod 6 and is used to drive the core rod 6 to drive the stop block 4 to move to a contracted state when the support rod descends.

[0064] When the support arm 2 is supported on the tooth teeth 5-1 by the stop block 4, when the suspension part 3 continues to descend, it can drive the two support arms 2 to move synchronously to abut against both sides of the upper hooping.

[0065] During actual use, during installation, first fixedly install the lower hooping on the outer surface of the pier column, fixedly install the sand cylinder 1 on the top ear of the lower hooping, fill the cylindrical part 1-1 with sand, and fixedly install the upper hooping on the outer surface of the pier column. At this time, suspend the suspension part 3 on the bolt of the upper hooping.

[0066] During disassembly, open the discharge port 1-3 on the cylindrical part 1-1 and loosen the upper hooping so that it can fall, driving the suspension part 3 and the support arms 2 to fall. When the support arms 2 fall, drive the stop block 4 to contact the tooth teeth 5-1 of the U-shaped frame 5. At this time, when the suspension part 3 continues to fall, drive the two support arms 2 to move towards both sides of the upper hooping. The support arms 2 drive the core rods 6 to move to abut against both sides of the upper hooping, so as to continue to center the two upper hoopings with the pier column and prevent the upper hooping from rubbing against the pier column when it falls. The core rods 6 contract along the direction of the support arms 2 and compress the first spring 7. The contraction of the core rods 6 drives the stop block 4 to be in an extended state. At this time, the stop block 4 can fall off from the top surface of the tooth teeth 5-1, enabling the support arms 2 to continue to fall.

[0067] At this time, the block 4 loses the support of the teeth 5-1, and the first spring 7 is reset, driving the core rod 6 to extend and drive the block 4 to retract, so that the block 4 is within the range of the teeth 5-1 when moving, so that when the support rod falls, the block 4 contacts the teeth 5-1 on the U-shaped frame 5 again, so that the core rod 6 abuts against the side of the upper clamp again, so that the upper clamp gradually falls, and it will be aligned with the pier before falling, which has the function of preventing the upper clamp from falling all at once, and preventing the upper clamp from rubbing against the pier for a long time when it is in an eccentric state, resulting in wear of the pier and the upper clamp, thereby improving safety.

[0068] In a relatively specific embodiment in which the support arm 2 drives the core rod 6 to abut against the side of the upper hoop, the hanging part 3 includes a hook 3-1, a swing rod 3-2 and an upper moving rod 3-3. Two hooks 3-1 are provided, and the two hooks 3-1 are respectively arranged at both ends of the upper moving rod 3-3. The hooks 3-1 can be hung on the bolts of the upper hoop for hanging the support arm 2;

[0069] The swing rod 3-2 is provided at both ends corresponding to the upper moving rod 3-3. The top end of the swing rod 3-2 is rotationally matched with the upper moving rod 3-3, and the bottom end of the swing rod 3-2 is rotationally matched with the corresponding support arm 2.

[0070] A lower moving rod 2-1 is provided between the bottom ends of the two support rods, and the two support rods are rotatably mounted on the two ends of the lower moving rod 2-1 respectively. The stopper 4 includes an inclined block 4-1 and a moving block 4-2. The inclined block 4-1 and the moving block 4-2 are both sleeved on the outside of the lower moving rod 2-1, and the inclined block 4-1 is rotatably connected with the moving block 4-2.

[0071] The bottom end of the core rod 6 is set as an inclined surface, and the inclined surface of the core rod 6 corresponds to the inclined surface of the inclined block 4-1, and the inclined block 4-1 slides on the inclined surface, and the moving block 4-2 can contact the top surface of the tooth 5-1.

[0072] When installing the suspension part 3, move the hook 3-1 to a suitable height and pass the bolt through the hook 3-1. When the upper hoop falls, the hook 3-1 is driven down. If the moving block 4-2 contacts the tooth 5-1, the lower moving rod 2-1 is blocked by the tooth 5-1, and the hook 3-1 continues to fall, so that the distance between the upper moving rod 3-3 and the lower moving rod 2-1 becomes smaller, and the swing rod 3-2 drives the circumferential rotation of the lower moving rod 2-1 of the support arm 2, drives the core rod 6 to abut against the side of the upper hoop, and drives the inclined block 4-1 to rotate synchronously, and is guided by the inclined surface of the core rod 6, so that the moving block 4-2 can be extended and disengaged from the range of the tooth 5-1, allowing the support arm 2 to continue to fall. This embodiment has the function of being suitable for different spacings of the upper hoop, so that they can all be aligned, preventing the upper hoop from scratching the pier column for a long time.

[0073] In a relatively specific embodiment of the U-shaped frame 5, the double-hoop cap beam bottom formwork construction device also includes:

[0074] The connecting pipe 8 is located at the bottom ends of two adjacent cylindrical parts 1-1 and is communicated with the cylindrical parts 1-1. A baffle 8-1 is fixedly installed at the inner center of the connecting pipe 8;

[0075] The fixed sleeve 9 is sleeved outside the U-shaped frame 5 and is fixedly connected to the cylindrical part 1-1. The U-shaped frame 5 can be slidably matched with the fixed sleeve 9 in its length direction and is used to connect the U-shaped frame 5 and the cylindrical part 1-1;

[0076] Two sealing plates 10 are respectively slidably arranged inside the two ends of the connecting pipe 8 and can control the opening and closing of the discharge port 1-3;

[0077] A moving plate 11 is provided corresponding to each of the sealing plates 10. The two moving plates 11 are both arranged between the two sealing plates 10. The moving plate 11 is connected to the sealing plate 10 on its same side and is used to drive the sealing plate 10 to move;

[0078] A set of top blocks 12 is provided corresponding to each of the sealing plates 10. The top blocks 12 are fixedly connected to the sealing plates 10 on their same sides. The opposite surfaces of the two sets of top blocks 12 are both set as inclined surfaces. When the sealing plate 10 is located in the middle area of the discharge port 1-3, the inclined surface of the top block 12 can contact the bottom end of the U-shaped frame 5.

[0079] Specifically, one set of top blocks 12 on the left side is set as one, and one set of top blocks 12 on the right side is set as two, and the top block 12 on the left side can slide between the top blocks 12 on the right side;

[0080] During use, the moving plate 11 drives the sealing plate 10 to move to the middle area of the discharge port 1-3. At this time, the inclined block 4-1 can contact the bottom end of the U-shaped frame 5. When the support arm 2 drops, the moving block 4-2 will hit the tooth 5-1 and drive the U-shaped frame 5 to move downward, and push the top block 12 to move the sealing plate 10 in the direction of closing the discharge port 1-3. At this time, the sand in the sand cylinder 1 is under the pressure of the columnar part 1-2 and the upper hoop, and will squeeze the sealing plate 10, push the sealing plate 10 back to the state of opening the discharge port 1-3, and drive the inclined block 4-1 to reset and push the U-shaped frame 5 upward. The baffle 8-1 is provided to prevent the extrusion forces of the sand on both sides from interfering with each other, and has the effect of buffering the U-shaped frame 5 and protecting the tooth 5-1.

[0081] In a relatively specific embodiment of the moving plate 11 driving the sealing plate 10 to move, this double-hoop type capping beam bottom form construction device further includes:

[0082] Two second springs 13 are provided corresponding to each of the two sealing plates 10. The two second springs 13 are symmetrically distributed with respect to the midline of the sealing plate 10. The two ends of the second spring 13 are respectively connected to the sealing plate 10 and the moving plate 11, and can provide a buffer stroke for the movement of the inclined block 4-1 to realize the buffering of the U-shaped frame 5;

[0083] A limiting rod 14 is provided for each of the two moving plates 11. The limiting rod 14 is disposed at the center of the moving plate 11 and faces the sealing plate 10 on the same side as it, and is used to limit the minimum distance between the sealing plate 10 and the moving plate 11.

[0084] When the moving plate 11 drives the sealing plate 10 to move to the position where the discharge opening 1-3 is closed, the sealing plate 10 is squeezed by the sand, compresses the second spring 13, and moves to a state of contacting the limiting rod 14. When the moving plate 11 moves to the other end position, it drives the sealing plate 10 to move to the state of opening the discharge opening 1-3. At this time, the sealing plate 10 is located in the middle area of the discharge opening 1-3, and at the same time, the sealing plate 10 is separated from the limiting rod 14, and the second spring 13 resets, so that the sealing plate 10 has an elastic formation. When the U-shaped frame 5 descends, the second spring 13 will be stretched. By using the elastic force of the second spring 13 and the squeezing force of the sand, the buffering effect can be further increased, and the tooth 5-1 can be better protected.

[0085] In a relative embodiment of driving the relative movement of the moving plate 11, the double-hoop type capping beam bottom formwork construction device further includes:

[0086] A screw sleeve 15 is provided for each of the two moving plates 11. The screw sleeve 15 is located outside the connecting pipe 8, and the screw sleeve 15 is fixedly connected to the corresponding moving plate 11 and is used to drive the moving plate 11 to move;

[0087] A bidirectional threaded rod 16 is rotatably disposed outside the connecting pipe 8. The two ends of the bidirectional threaded rod 16 are respectively threadedly connected to the two screw sleeves 15 and are used to drive the relative movement of the screw sleeves 15;

[0088] A rotating head 16-1 is fixedly installed in the middle area of the bidirectional threaded rod 16 and is used to drive the bidirectional threaded rod 16 to rotate.

[0089] A wrench is clamped at the rotating head 16-1 and drives the rotating head 16-1 to rotate, so that the bidirectional threaded rod 16 rotates and drives the two screw sleeves 15 to have relative displacement, realizing the relative movement of the moving plate 11.

[0090] In a relatively specific embodiment for realizing the connection between the screw sleeve 15 and the moving plate 11, a first chute 8-2 is formed on one side of the connecting pipe 8 facing the bidirectional threaded rod 16. The screw sleeve 15 is slidably installed in the first chute 8-2. A baffle plate 11-1 is fixedly installed on the outer wall of the moving plate 11. The baffle plate 11-1 faces the sealing plate 10 on the same side as it. The width range of the baffle plate 11-1 is greater than the width range of the first chute 8-2, and the baffle plate 11-1 is embedded in the inner wall of the connecting pipe 8. When the moving plate 11 moves to the extreme position, the baffle plate 11-1 can completely block the first chute 8-2, preventing sand from flowing out of the first chute 8-2, resulting in a situation where the pressure of the sand is insufficient to push the sealing plate 10 to the open discharge port 1-3 state.

[0091] In a relatively specific embodiment for realizing the relative movement between the sealing plate 10 and the top block 12, a second chute 8-3 is formed on one side of the connecting pipe 8 facing the top block 12, and the second chute 8-3 is located in the middle area of the connecting pipe 8. The second chute 8-3 is not within the range of the discharge port 1-3. A connecting rod 10-1 is fixedly installed on the sealing plate 10, and the connecting rod 10-1 slides in the second chute 8-3 to realize the connection between the sewing plate and the top block 12.

[0092] In a relatively specific embodiment for realizing the dropping of the support frame, for this double-hoop type capping beam bottom form construction device, there are two U-shaped frames 5. Inverted L-shaped grooves 9-1 are formed on both sides of the fixed sleeve 9, and the transverse grooves of the two L-shaped grooves 9-1 correspond to each other. A sliding block 5-2 that can slide in the L-shaped groove 9-1 is fixedly installed on the U-shaped frame 5. When the sliding block 5-2 is located in the transverse groove, the two U-shaped frames 5 can support the stop block 4 and support the support arm 2 at the highest position. When the sliding block 5-2 is located in the longitudinal groove, the two U-shaped frames 5 can form a channel for the stop block 4 to drop, the stop block 4 fits with the channel, and the U-shaped frame 5 can slide in cooperation with the fixed sleeve 9 in its length direction;

[0093] The inclined block 4-1 corresponds to the U-shaped frame 5 on the different side from it. When the sealing plate 10 is opened, the inclined block 4-1 drives the sliding block 5-2 to move from the end of the transverse groove to the connection with the longitudinal groove.

[0094] During installation, first move the U-shaped frame 5 so that the sliding block 5-2 is located at the end of the transverse groove of the L-shaped groove 9-1. At this time, the opposite surfaces of the two U-shaped frames 5 are in contact, which can support the moving block 4-2, facilitating the bottom to be supported when hanging the hanging hook 3-1, achieving the effect of assisting installation;

[0095] When the two moving plates 11 move relative to each other, they can drive the two sets of inclined blocks 4-1 to move relative to each other and contact the U-shaped frame 5. The two moving plates 11 continue to move relative to each other, pushing the sliding blocks 5-2 on the two U-shaped frames 5 to the connection of the transverse groove and the longitudinal groove. At this time, the distance between the two U-shaped frames 5 forms a channel for the retaining block 4 to fall, enabling the support arm 2 to fall normally. Moreover, when the sliding block 5-2 on the U-shaped frame 5 slides in the longitudinal groove, it has a buffering effect.

[0096] In a relatively specific embodiment of the moving block 4-2 and the fixed sleeve 9, extension plates 9-2 are fixedly installed on both sides of the top of the fixed sleeve 9. The moving block 4-2 is T-shaped, and the two ends of the moving block 4-2 are in contact with the extension plates 9-2, which can maintain the stability of the support arm 2 when it descends. The top of the moving block 4-2 is provided with an inclined surface, which corresponds to the inclined surface of the tooth 5-1, so as to realize the insertion of the moving block 4-2 between the upper and lower teeth 5-1.

[0097] When the support arm 2 falls, the two ends of the moving block 4-2 can slide along the length direction of the extension plate 9-2, and the moving block 4-2 fits into the channel formed by the two U-shaped frames 5, enabling the U-shaped frame 5 to guide the moving block 4-2. When the support arm 2 falls, it can maintain stability. Moreover, when the support arm 2 gradually falls, the inclined surface of the moving block 4-2 can fit with the inclined surface of the tooth 5-1, enabling the moving block 4-2 to retract normally.

[0098] The technical scope of the present invention is not limited to the content in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present invention, and these deformations and modifications should all fall within the scope of the present invention.

Claims

1. A double-hoop type formwork construction device for the bottom of a capping beam, characterized in that It includes a sand cylinder (1), and the sand cylinder (1) is located between the upper hooping and the lower hooping. The sand cylinder (1) includes a cylindrical part (1-1) and a columnar part (1-2). The columnar part (1-2) is sleeved inside the cylindrical part (1-1), and the columnar part (1-2) can axially slide inside the cylindrical part (1-1). Sand can be filled inside the cylindrical part (1-1) to support the columnar part (1-2), and the columnar part (1-2) can support the upper hooping. A discharge opening (1-3) that can be closed is provided at the bottom end of the columnar part (1-2). When the discharge opening (1-3) is in a closed state, it can prevent sand from flowing out of the cylindrical part (1-1). When the discharge opening (1-3) is in an open state, the columnar part (1-2) squeezes downward to discharge sand from the discharge opening (1-3).

2. The double-hoop type pier cap bottom formwork construction device according to claim 1, characterized in that, It also includes: A suspension part (3) that can be suspended at the bolt of the upper hooping and descends synchronously with the upper hooping. Two support arms (2) are located below the suspension part (3) and are connected to the suspension part (3). The two support arms (2) are symmetrically distributed along the axial direction of the pier column. When the suspension part (3) descends and the support arms (2) are blocked, the support arms (2) are synchronously moved to abut against both sides of the upper hooping for centering the upper hooping and the pier column. A stop block (4) is provided on each of the opposite surfaces of the two support arms (2), and the stop block (4) can telescopically move inside the support arm (2). A U-shaped frame (5) is connected to the cylindrical part (1-1) and is located between adjacent sand cylinders (1). Teeth (5-1) are evenly installed on both sides of the opening of the U-shaped frame (5). The teeth (5-1) are in an inverted trapezoid shape. When the stop block (4) is in a contracted state, the stop block (4) can be blocked by the top surface of the teeth (5-1) to enable the two support arms (2) to move synchronously. When the stop block (4) is in an extended state, the stop block (4) can fall off from the top surface of the teeth (5-1) to enable the two support arms (2) to drop downward. There are two core rods (6), which are respectively sleeved inside the two support arms (2). The core rods (6) can slide in the length direction of the support arms (2). The top end of the core rod (6) can abut against the side surface of the upper hooping, and the bottom end of the core rod (6) is in sliding fit with the stop block (4) for controlling the telescopic movement of the stop block (4). A first spring (7) is located between the support arm (2) and the core rod (6) and is used for driving the core rod (6) to drive the stop block (4) to move to a contracted state when the support rod descends. When the support arm (2) is supported on the teeth (5-1) by the stop block (4) and the suspension part (3) continues to descend, it can drive the two support arms (2) to move synchronously to abut against both sides of the upper hooping.

3. The double-hoop type pier cap bottom formwork construction device according to claim 2, characterized in that The suspension part (3) includes a hook (3-1), a swing rod (3-2), and an upper moving rod (3-3). There are two hooks (3-1), and the two hooks (3-1) are respectively arranged at both ends of the upper moving rod (3-3). The hook (3-1) can be suspended on the bolt of the upper hooping for suspending the support arm (2). One swing rod (3-2) is provided at each of the two ends corresponding to the upper moving rod (3-3). The top end of the swing rod (3-2) is rotationally fitted with the upper moving rod (3-3), and the bottom end of the swing rod (3-2) is rotationally fitted with the corresponding support arm (2). A lower moving rod (2-1) is provided between the bottom ends of the two support rods. The two support rods are respectively rotatably installed at the two ends of the lower moving rod (2-1). The stopper (4) includes an inclined block (4-1) and a moving block (4-2). Both the inclined block (4-1) and the moving block (4-2) are sleeved outside the lower moving rod (2-1), and the inclined block (4-1) is rotatably connected to the moving block (4-2). The bottom end of the core rod (6) is provided with an inclined surface. The inclined surface of the core rod (6) corresponds to the inclined surface of the inclined block (4-1), and the inclined block (4-1) slides on the inclined surface. The moving block (4-2) can contact the top surface of the tooth (5-1).

4. A double-hoop type bottom formwork construction device for capping beams according to claim 2 or 3, characterized in that, It further includes: A connecting pipe (8) is located at the bottom ends of two adjacent cylindrical parts (1-1) and is communicated with the cylindrical parts (1-1). A baffle (8-1) is fixedly installed at the center inside the connecting pipe (8). A fixed sleeve (9) is sleeved outside the U-shaped frame (5) and is fixedly connected to the cylindrical part (1-1). The U-shaped frame (5) can slide in its length direction in cooperation with the fixed sleeve (9) for connecting the U-shaped frame (5) and the cylindrical part (1-1). Two sealing plates (10) are respectively slidably arranged inside the two ends of the connecting pipe (8) and can control the opening and closing of the discharge port (1-3). A moving plate (11) is provided corresponding to each of the sealing plates (10). The two moving plates (11) are both arranged between the two sealing plates (10). The moving plate (11) is connected to the sealing plate (10) on its same side and is used to drive the sealing plate (10) to move. A top block (12) is provided in a group corresponding to each of the sealing plates (10). The top block (12) is fixedly connected to the sealing plate (10) on its same side. The opposite surfaces of the two groups of top blocks (12) are both provided with inclined surfaces. When the sealing plate (10) is located in the middle area of the discharge port (1-3), the inclined surface of the top block (12) can contact the bottom end of the U-shaped frame (5).

5. The double-hoop type formwork construction device for the capping beam bottom as described in claim 4, wherein It further includes: Two second springs (13) are provided corresponding to the two sealing plates (10). The two second springs (13) are symmetrically distributed with respect to the midline of the sealing plate (10). The two ends of the second spring (13) are respectively connected to the sealing plate (10) and the moving plate (11), and can provide a buffer stroke for the movement of the inclined block (4-1) to realize the buffering of the U-shaped frame (5). A limiting rod (14) is provided corresponding to each of the two moving plates (11). The limiting rod (14) is arranged at the center of the moving plate (11) and faces the sealing plate (10) on its same side, and is used to limit the minimum distance between the sealing plate (10) and the moving plate (11).

6. The double-hoop type falsework construction device for the capping beam according to claim 5, characterized in that, It further includes: The screw sleeve (15) is provided with one corresponding to each of the two moving plates (11). The screw sleeve (15) is located outside the connecting pipe (8), and the screw sleeve (15) is fixedly connected to the corresponding moving plate (11) for driving the moving plate (11) to move; The bidirectional threaded rod (16) is rotatably arranged outside the connecting pipe (8). The two ends of the bidirectional threaded rod (16) are respectively threadedly connected to the two screw sleeves (15) for driving the relative movement of the screw sleeves (15); The rotating head (16-1) is fixedly installed in the middle area of the bidirectional threaded rod (16) for driving the bidirectional threaded rod (16) to rotate.

7. The double-hoop type bottom formwork construction device for a capping beam according to claim 4, characterized in that, There are two U-shaped frames (5). Inverted L-shaped grooves (9-1) are opened on both sides of the fixed sleeve (9). The transverse grooves of the two L-shaped grooves (9-1) correspond to each other. A sliding block (5-2) capable of sliding in the L-shaped groove (9-1) is fixedly installed on the U-shaped frame (5). When the sliding block (5-2) is located in the transverse groove, the two U-shaped frames (5) can support the stop block (4) and support the support arm (2) at the highest position. When the sliding block (5-2) is located in the longitudinal groove, the two U-shaped frames (5) can form a channel for the stop block (4) to fall. The stop block (4) fits with the channel, and the U-shaped frame (5) can slide in cooperation with the fixed sleeve (9) in its length direction.

8. The construction device for the bottom formwork of a double-hoop type bent cap according to claim 7, wherein, The inclined block (4-1) corresponds to the U-shaped frame (5) on the different side from it. When the sealing plate (10) is opened, the inclined block (4-1) drives the sliding block (5-2) to move from the end of the transverse groove to the connection with the longitudinal groove.

9. The construction device for the bottom formwork of a double-hoop type bent cap according to claim 3, wherein, Extension plates (9-2) are fixedly installed on both sides of the top of the fixed sleeve (9). The moving block (4-2) is T-shaped, and both ends of the moving block (4-2) are in contact with the extension plates (9-2) to maintain the stability when the support arm (2) descends. The top of the moving block (4-2) is provided with an inclined surface, which corresponds to the inclined surface of the tooth (5-1), so that the moving block (4-2) is inserted between the upper and lower teeth (5-1).

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