A steel formwork turnover structure for power plant chimney and a using method thereof

Abstract

The present application relates to steel formwork turning plate technical field, especially to a kind of steel formwork turning plate structure for power plant chimney and use method.It includes fixed seat, the fixed seat is provided with symmetric and evenly distributed through-hole, the fixed seat is fixed with first hydraulic rod, the fixed seat is slidably connected with mounting seat, the mounting seat is slidably connected with first steel plate, the first steel plate is provided with symmetric and evenly distributed through-hole, the mounting seat is fixed with second hydraulic rod, the first steel plate is rotatably connected with symmetric distribution second steel plate, the first steel plate is hinged with symmetric distribution first fixed shell, symmetric distribution the first fixed shell is slidably connected with first sliding rod on opposite side.The first sliding rod of the present application pushes adjacent second steel plate to produce rotation, so as to change the overall arc of the device, so that the device can adapt to the construction of various diameter chimneys, reduce the formwork cost when chimney is built.

Description

Technical Field

[0001] This invention relates to the field of steel formwork flip-up technology, and in particular to a steel formwork flip-up structure and its application method for power plant chimneys. Background Technology

[0002] The steel formwork flip-plate structure used in power plant chimney construction is a highly efficient construction technology, mainly used in the concrete pouring process of the chimney body. The steel formwork flip-plate, also known as a slipform or sliding formwork, is a formwork system that can be raised upwards as the chimney height increases. It typically consists of multiple steel formwork sections, which are interconnected by special connectors to form a ring composed of inner and outer steel formwork sections. Reinforcing bars are installed in the annular cavity between the two rings formed by several steel formwork sections, and concrete is poured in. As the concrete is poured and solidified layer by layer, once a layer of concrete reaches sufficient strength, the entire formwork system is lifted upwards along the outer wall of the chimney by hydraulic jacks or other lifting devices, making room for the pouring of the next layer of concrete. This process is repeated until the chimney reaches its designed height.

[0003] Most existing steel formwork is of fixed specifications, designed according to the dimensions of the chimney. This means that new steel formwork needs to be produced whenever a chimney of a different size is built, which significantly increases the cost of steel formwork during chimney construction and results in low economic efficiency. Summary of the Invention

[0004] In order to overcome the shortcomings mentioned in the background art, the present invention provides a steel formwork flap structure for power plant chimneys and a method of using it.

[0005] The technical solution of the present invention is: a steel formwork flap structure for a power plant chimney, comprising a fixed base, the fixed base having symmetrically and evenly distributed through holes, a first hydraulic rod fixedly connected to the fixed base, an mounting base slidably connected to the fixed base, the telescopic end of the first hydraulic rod being fixedly connected to the mounting base, a first steel plate slidably connected to the mounting base, the first steel plate having symmetrically and evenly distributed through holes, the symmetrically and evenly distributed through holes on the first steel plate corresponding one-to-one with the symmetrically and evenly distributed through holes on the fixed base, a second hydraulic rod fixedly connected to the mounting base, the first steel plate being fixedly connected to the telescopic end of the second hydraulic rod, a symmetrically distributed second steel plate being rotatably connected to the first steel plate, a symmetrically distributed first fixed shell being hinged to the first steel plate, and a first sliding rod being slidably connected to the opposite sides of the symmetrically distributed first fixed shell, the first sliding rod being hinged to the adjacent second steel plate.

[0006] Preferably, the first steel plate is fixedly connected to symmetrically distributed second fixed shells, the second fixed shells are slidably connected to second sliding rods, liquid is injected between the second sliding rods and adjacent second fixed shells, liquid is injected between the first sliding rods and adjacent first fixed shells, the second fixed shells and adjacent first fixed shells are connected by hoses, the first steel plate is fixedly connected to a first threaded sleeve, the first threaded sleeve is threadedly connected to a first threaded rod, the symmetrically distributed second sliding rods are jointly fixedly connected to a connecting frame, and the first threaded rod is rotatably connected to the connecting frame.

[0007] Preferably, the first steel plate is composed of a No. 1 plate and symmetrically distributed No. 2 plates, all of which are slidably connected to the No. 1 plate. The second steel plate is composed of a No. 3 plate and a No. 4 plate, which are slidably connected. The No. 3 plate is rotatably connected to the adjacent No. 2 plate. The first fixed shell is hinged to the adjacent No. 2 plate, and the first sliding rod is hinged to the adjacent No. 3 plate.

[0008] Preferably, the length of the first steel plate is twice the length of the second steel plate, so as to form a uniform cavity in the device.

[0009] Preferably, the first plate is fixedly connected to a centrally symmetrically distributed third fixed shell, the third fixed shell is slidably connected to a third sliding rod fixedly connected to the adjacent second plate, and liquid is injected between the third sliding rod and the adjacent third fixed shell. The first plate is fixedly connected to a symmetrically distributed fourth fixed shell, the fourth fixed shell is slidably connected to a fourth sliding rod fixedly connected to the connecting frame, and liquid is injected between the fourth sliding rod and the adjacent fourth fixed shell. The fourth fixed shell is connected to the adjacent third fixed shell via a hose. The third plate is fixedly connected to a fifth fixed shell, the fifth fixed shell is slidably connected to a fifth fixed rod fixedly connected to the adjacent fourth plate, and liquid is injected between the fifth fixed rod and the adjacent fifth fixed shell. The first plate is fixedly connected to a centrally symmetrically distributed sixth fixed shell, the sixth fixed shell is slidably connected to a sixth fixed rod fixedly connected to the connecting frame, and liquid is injected between the sixth fixed rod and the adjacent sixth fixed shell. The sixth fixed shell is connected to the adjacent fifth fixed shell via a hose.

[0010] Preferably, the sixth fixed shell is the same as the fourth fixed shell, the fifth fixed shell is the same as the third fixed shell, the fifth fixed rod is the same as the third sliding rod, the sixth fixed rod is the same as the fourth sliding rod, and the relative sliding range between the fourth plate and the third plate is equal to the relative sliding range between the second plate and the first plate.

[0011] Preferably, the fourth plate on one side is rotatably connected to symmetrically distributed second threaded rods, and the second threaded rods are threadedly connected to second threaded sleeves. The fourth plate on the other side is fixedly connected to symmetrically and evenly distributed fixing plates, and the evenly distributed fixing plates are press-fitted with the corresponding second threaded sleeves.

[0012] Preferably, it further includes symmetrically distributed first connecting rods, which are detachably installed in adjacent through holes of the first plate. The first plate is detachably installed with symmetrically distributed second connecting rods, which are located in adjacent through holes of the first plate. The first connecting rods are slidably connected to circumferentially evenly distributed locking pins. The second connecting rods are provided with circumferentially evenly distributed grooves. The locking pins are limited to the adjacent grooves on the second connecting rods. The first connecting rods are provided with cavities, and liquid is filled in the cavities of the first connecting rods and slidably connected to injection rods.

[0013] Preferably, the first connecting rod is slidably connected to a limiting rod, a spring is provided between the limiting rod and the adjacent first connecting rod, and the injection rod is provided with a groove that limits and cooperates with the adjacent limiting rod.

[0014] Preferably, a method for using a steel formwork flap structure for a power plant chimney, based on the above-mentioned steel formwork flap structure for a power plant chimney, includes the following steps:

[0015] S1: First, adjust the angle between the first steel plate and the symmetrically distributed second steel plates according to the diameter of the construction chimney. When adjusting the angle, rotate the first threaded rod so that the first threaded rod drives the connecting frame to move. The connecting frame drives the adjacent first sliding rod to move, and the first sliding rod pushes the adjacent second steel plate to rotate.

[0016] S2: While the second steel plate rotates, the connecting frame pushes the symmetrically distributed fourth sliding rod and the centrally symmetrically distributed sixth fixed rod to move. The fourth sliding rod and the sixth fixed rod respectively drive the adjacent third sliding rod and the fifth fixed rod to move. The third sliding rod and the fifth fixed rod respectively push the adjacent second plate and the fourth plate to move.

[0017] S3: After adjustment, separate the first steel plate from the mounting base and the second hydraulic rod, and then use several adjusted upper parts of the device to form two rings for pouring the first layer of concrete.

[0018] S4: After the two rings of this device are placed, the corresponding first steel plates are fixed together by long bolts and nuts. The two adjacent devices are fixed together by turning the second threaded sleeve so that the second threaded rod on one device is located between the adjacent and evenly distributed fixed plates on the other adjacent device. Then the second threaded sleeve is rotated so that the second threaded sleeve presses against the adjacent and evenly distributed fixed plates on the adjacent devices for fixing.

[0019] S5: After the two rings of this device are installed, steel bars and concrete are placed in the cavity between the two rings of this device to form the chimney body. After the concrete reaches a certain strength, the two rings of this device are removed. Then, the fixing seat is fixed on the hole left in the first layer of concrete. Then, the first steel plate is reconnected to the mounting seat and the second hydraulic rod to pour the second layer.

[0020] S6: After the second layer is poured and reaches a certain strength, the second hydraulic rod drives the first steel plate to move, thereby separating the first steel plate and the symmetrically distributed second steel plates from the concrete. Then, the first hydraulic rod is activated, and the first hydraulic rod extends to push the mounting base and the first steel plate upward to pour the third layer of concrete.

[0021] S7: After the third layer of concrete is poured, the fixing seat is separated from the first layer of concrete. Then the first hydraulic rod is activated, the first hydraulic rod is shortened and drives the fixing seat to move upward. Then the fixing seat is fixed at the hole left in the second layer of concrete. After that, the first steel plate is separated from the third layer of concrete and moved upward to pour the fourth layer.

[0022] S8: The above process is repeated alternately until the entire chimney is poured. After the chimney is poured, the device is removed from the chimney and recycled.

[0023] The present invention has the following advantages: by causing the first sliding rod to push the adjacent second steel plate to rotate, the present invention changes the overall curvature of the device, enabling the device to adapt to the construction of chimneys of various diameters and reducing the template cost during chimney construction.

[0024] By adjusting the positions of the adjacent second and fourth plates respectively using the third sliding rod and the fifth fixed rod, the length of the device changes synchronously after the curvature changes, so that the device can correspond one-to-one and form two uniform inner and outer rings when in use.

[0025] By pressing the second threaded sleeve against the adjacent fixed plates on the adjacent device, the rapid connection and disassembly of adjacent devices located in the same circle are achieved, thereby improving the efficiency of chimney construction.

[0026] By locking the corresponding first and second connecting rods with locking pins, the corresponding two first steel plates can be quickly fixed and removed, improving the efficiency of chimney construction. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a three-dimensional structural cross-sectional view of the fixing base of the present invention;

[0029] Figure 3 This is a three-dimensional sectional view of the second threaded sleeve of the present invention;

[0030] Figure 4 This is a three-dimensional structural diagram of the first threaded rod and the connecting frame of the present invention;

[0031] Figure 5 This is a three-dimensional structural cross-sectional view of the second fixing shell and the first threaded sleeve of the present invention;

[0032] Figure 6 This is a three-dimensional structural diagram showing the positions of the first connecting rod and the second connecting rod of the present invention;

[0033] Figure 7 This is a three-dimensional structural cross-sectional view of the first connecting rod and the second connecting rod of the present invention;

[0034] Figure 8 This is a three-dimensional structural cross-sectional view of the first connecting rod and locking pin of the present invention;

[0035] Figure 9 This is a three-dimensional structural cross-sectional view of the first connecting rod, injection rod, and limiting rod of the present invention.

[0036] In the attached diagram, the following labels are used: 1-fixed base, 2-first hydraulic rod, 3-mounting base, 4-first steel plate, 41-plate 1, 42-plate 2, 5-second hydraulic rod, 6-second steel plate, 61-plate 3, 62-plate 4, 7-first fixed shell, 8-first sliding rod, 9-second fixed shell, 10-second sliding rod, 11-first threaded sleeve, 12-first threaded rod, 13-connecting frame, 14-third fixed shell, 15-third sliding rod, 16-fourth fixed shell, 17-fourth sliding rod, 18-fifth fixed shell, 19-fifth fixed rod, 20-sixth fixed shell, 21-sixth fixed rod, 22-second threaded rod, 23-second threaded sleeve, 24-fixed plate, 25-first connecting rod, 26-second connecting rod, 27-locking pin, 28-injection rod, 29-limiting rod. Detailed Implementation

[0037] The technical solution will be preferably described below with reference to specific embodiments. It should be noted that the terms "up," "down," "left," and "right" used herein refer only to the position of the structure shown in the corresponding drawings. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and have no sequential or technical meaning. Unless otherwise specified, the term "connection" in this application includes both direct and indirect connections.

[0038] Most existing steel formwork is of fixed specifications, designed according to the dimensions of the chimney. This means that new steel formwork needs to be produced whenever a chimney of a different size is built, which significantly increases the cost of steel formwork during chimney construction and results in low economic efficiency.

[0039] Example 1: A steel formwork flap structure for a power plant chimney, such as... Figures 1-4 As shown, the device includes a fixed base 1 with four through holes symmetrically arranged vertically and evenly distributed horizontally for fixing the fixed base 1. A first hydraulic rod 2 is fixedly connected to the fixed base 1. A mounting base 3 that can move vertically is slidably connected to the fixed base 1. The telescopic end of the first hydraulic rod 2 is fixedly connected to the mounting base 3. A first steel plate 4 that can move back and forth is slidably connected to the rear side of the mounting base 3. The first steel plate 4 has four through holes symmetrically arranged vertically and evenly distributed horizontally for long bolts to pass through, thereby fixing two corresponding first steel plates 4 to prevent corresponding bolts from passing through. When cement is poured between the two first steel plates 4, they shift. The four through holes on the first steel plate 4 correspond one-to-one with the four through holes on the fixed seat 1. The mounting seat 3 is fixedly connected to the second hydraulic rod 5. The front side of the first steel plate 4 is fixedly connected to the telescopic end of the second hydraulic rod 5. The left and right sides of the first steel plate 4 are rotatably connected to the second steel plate 6. The first steel plate 4 is hinged to two first fixed shells 7 that are symmetrically distributed on the left and right sides through the hinge seat. The opposite sides of the two first fixed shells 7 are slidably connected to the first sliding rods 8. The first sliding rods 8 are hinged to the adjacent second steel plate 6 through the hinge seat.

[0040] like Figure 1 and Figures 3-5As shown, two second fixed shells 9 are symmetrically distributed on the left and right sides of the front side of the first steel plate 4. A second sliding rod 10 is slidably connected to the front side of the second fixed shell 9. Liquid is injected between the second sliding rod 10 and the adjacent second fixed shell 9. The liquid mentioned here and below is hydraulic oil used for transmission. Liquid is injected between the first sliding rod 8 and the adjacent first fixed shell 7. The second fixed shell 9 and the adjacent first fixed shell 7 are connected by a hose, so that the liquid between the first fixed shell 7 and the adjacent second fixed shell 9 can be interconnected. A first threaded sleeve 11 is fixed to the front side of the first steel plate 4. The first threaded sleeve 11 is located between the two second fixed shells 9. The first threaded sleeve 11 is threadedly connected to a first threaded rod 12. A handle is fixed to the front side of the first threaded rod 12. A connecting frame 13 is fixed to the front side of the two second sliding rods 10. The first threaded rod 12 is rotatably connected to the connecting frame 13. When the first threaded rod 12 is rotated, the first threaded rod 12 moves back and forth, and drives the two second sliding rods 10 to move through the connecting frame 13.

[0041] like Figure 1 , Figure 3 and Figure 4 As shown, the first steel plate 4 consists of a first plate 41 and two second plates 42 symmetrically distributed on the left and right. Both second plates 42 are slidably connected to the first plate 41. The second steel plate 6 consists of a third plate 61 and a fourth plate 62, which are slidably connected. The third plate 61 is rotatably connected to the adjacent second plate 42. The first fixed shell 7 is hinged to the adjacent second plate 42, and the first sliding rod 8 is hinged to the adjacent third plate 61. This allows the device to adjust its length according to changes in the degree of bending. The length of the first steel plate 4 is twice the length of the second steel plate 6, which is used to form a uniform cavity in the device. When two adjacent devices are connected, the two adjacent second steel plates 6 on the two devices are connected to each other. At this time, the length of the two second steel plates 6 is equal to the length of the first steel plate 4, so that several devices are connected to each other to form a uniform circle.

[0042] like Figure 1 and Figures 3-5As shown, plate 41 is fixedly connected to two centrally symmetrically distributed third fixed shells 14 via a mounting plate. Each third fixed shell 14 is slidably connected to a third sliding rod 15, which is fixedly connected to an adjacent plate 42 via a mounting plate. Liquid is injected between the third sliding rod 15 and the adjacent third fixed shell 14. Plate 41 is fixedly connected to two vertically symmetrically distributed fourth fixed shells 16. The front side of each fourth fixed shell 16 is slidably connected to a fourth sliding rod 17, which is fixedly connected to a connecting frame 13. Liquid is injected between the fourth sliding rod 17 and the adjacent fourth fixed shell 16. 16 is connected to the adjacent third fixed shell 14 via a hose. When the connecting frame 13 moves, the connecting frame 13 drives the two fourth sliding rods 17 to move, thereby allowing the liquid in the adjacent fourth fixed shell 16 to enter the adjacent third fixed shell 14 through the hose. The third plate 61 is fixedly connected to the fifth fixed shell 18 via a mounting plate. The fifth fixed shell 18 is slidably connected to the fifth fixed rod 19, which is fixedly connected to the adjacent fourth plate 62 via a mounting plate. Liquid is injected between the fifth fixed rod 19 and the adjacent fifth fixed shell 18. The first plate 41 is fixedly connected to a centrally symmetrical... The cloth has two sixth fixing shells 20. A sixth fixing rod 21, fixed to the connecting frame 13, is slidably connected to the front of each sixth fixing shell 20. Liquid is injected between the sixth fixing rod 21 and the adjacent sixth fixing shell 20. The sixth fixing shell 20 is connected to the adjacent fifth fixing shell 18 via a hose. When the connecting frame 13 moves, it drives the two sixth fixing rods 21 to move, allowing the liquid inside the adjacent sixth fixing shell 20 to enter the adjacent fifth fixing shell 18 through the hose. The sixth fixing shell 20 is identical to the fourth fixing shell 16. The fifth fixing... The fixed shell 18 is the same as the third fixed shell 14, the fifth fixed rod 19 is the same as the third sliding rod 15, the sixth fixed rod 21 is the same as the fourth sliding rod 17, and the relative sliding range between the fourth plate 62 and the third plate 61 is equal to the relative sliding range between the second plate 42 and the first plate 41. When the length of the first steel plate 4 increases, the length of the second steel plate 6 increases synchronously, but the distance the second steel plate 6 increases is half the distance the first steel plate 4 increases. At this time, the length of the two adjacent second steel plates 6 connected by this device will be equal to the length of the first steel plate 4.

[0043] like Figure 1 and Figure 3As shown, the fourth plate 62 on the left is rotatably connected to two second threaded rods 22 that are symmetrically distributed vertically via a hinge seat. The front side of the second threaded rod 22 is threadedly connected to a second threaded sleeve 23. The front side of the second threaded sleeve 23 is provided with two through holes that are symmetrically distributed vertically. These through holes are used to insert a lever to rotate the second threaded sleeve 23, thereby reducing the force required to rotate the second threaded sleeve 23. The fourth plate 62 on the right is fixedly connected to two sets of fixed plates 24 that are symmetrically distributed vertically. Each set contains two fixed plates 24 that are evenly distributed vertically. The two evenly distributed fixed plates 24 are pressed and fitted with the corresponding second threaded sleeves 23. The diameter of the second threaded sleeve 23 is larger than the length of the gap between the two evenly distributed fixed plates 24, thereby completing the connection between the two devices.

[0044] When using this device, first adjust the angle between the first steel plate 4 and the two second steel plates 6 according to the diameter of the construction chimney. During adjustment, the device on the outer ring rotates the first threaded rod 12, causing the connecting frame 13 to move backward. The connecting frame 13 then moves the two second fixed shells 9 backward. As the second fixed shells 9 move, they press the liquid inside the adjacent second sliding rod 10 into the adjacent first fixed shell 7 through a hose. This increases the amount of liquid in the first fixed shell 7, pushing the adjacent first sliding rod 8 outward. The movement of the first sliding rod 8 pushes the adjacent second steel plate 6 to rotate backward. As the connecting frame 13 moves backward, it pushes the two fourth sliding rods 17 and the two sixth fixed rods 21 backward. The backward movement of the fourth sliding rods 17 presses the liquid inside the adjacent fourth fixed shell 16 into the adjacent third fixed shell 14 through a hose. The increase in liquid in the third fixed shell 14 pushes the adjacent third sliding rod 15 to move outward. The third sliding rod 15 pushes the adjacent second plate 42 to move away from the first plate 41. The sixth fixed rod 21 moves backward, pressing the liquid in the adjacent sixth fixed shell 20 into the adjacent fifth fixed shell 18 through the hose. The increase in liquid in the fifth fixed shell 18 pushes the adjacent fifth fixed rod 19 to move outward. The fifth fixed rod 19 drives the adjacent fourth plate 62 to move away from the adjacent third plate 61. The adjustment angle of the device located in the inner circle is the opposite of the above. The device located in the inner circle rotates the first threaded rod 12 in the opposite direction, causing the first threaded rod 12 to drive the connecting frame 13 to move forward, thereby causing the connecting frame 13 to drive the second steel plate 6 to rotate forward. The second plate 42 moves closer to the first plate 41, and the fourth plate 62 moves closer to the adjacent third plate 61.

[0045] After adjustment, separate the first steel plate 4 from the mounting base 3 and the second hydraulic rod 5. Then, use several adjusted upper halves of the device (i.e., the parts containing the first steel plate 4) to form two rings for pouring the first layer of concrete. At this time, the devices in the inner ring and the devices in the outer ring correspond one-to-one, and the four through holes on the corresponding two devices' number one plates 41 are aligned. Use long bolts to pass through the corresponding through holes on the first steel plates 4 of the two corresponding devices, and then fix them with nuts. For devices in the same ring, turn the second threaded sleeve 23 so that the second threaded rod 22 is located on the two adjacent fixed parts of the adjacent devices. Between the fixed plates 24, rotate the second threaded sleeve 23 to press the two adjacent fixed plates 24 on the adjacent device, thereby completing the connection and fixation between adjacent devices in the same ring. Then, place steel bars and concrete in the cavity between the two rings to form the chimney body. After the first layer of concrete dries, remove the two rings of the device, then align the through hole on the fixed seat 1 with the hole left in the first layer of concrete for installation. Then, reconnect the first steel plate 4 to the mounting seat 3 and the second hydraulic rod 5. At this time, the lower side of the first steel plate 4 is lower than the upper side of the first layer of concrete. After the second layer is enclosed, pour the concrete. Once the second layer of concrete has dried completely, remove the long bolts and nuts fixing the two corresponding first steel plates 4 of this device. Then, activate the second hydraulic rod 5. The second hydraulic rod 5 shortens and moves the first steel plate 4 forward, thus separating the first steel plate 4 and the two second steel plates 6 from the concrete. Next, activate the first hydraulic rod 2. The first hydraulic rod 2 extends and pushes the mounting base 3 and the first steel plate 4 upward to facilitate the pouring of the third layer of concrete. When the first steel plate 4 reaches the height of the third layer, the first hydraulic rod 2 closes, and then the second hydraulic rod 5 extends and pushes... After moving the first steel plate 4 to the designated position, close it. When the third layer of concrete is completely dry, separate the fixing seat 1 from the first layer of concrete, and then start the first hydraulic rod 2. The first hydraulic rod 2 shortens and drives the fixing seat 1 to move upward. When the through hole on the fixing seat 1 is aligned with the hole left on the second layer of concrete, the first hydraulic rod 2 stops working. At this time, fix the fixing seat 1, and then separate the first steel plate 4 from the third layer of concrete and move it upward to pour the fourth layer. The above process is repeated alternately until the entire chimney is poured. After the chimney is poured, remove the device from the chimney and recycle it.

[0046] The existing steel formwork requires the use of long screws and nuts to fix two corresponding steel formworks together. This fixing method is inefficient and affects the construction speed of the chimney.

[0047] Example 2: Based on Example 1, as follows Figure 1 , Figure 3 , Figure 4 and Figures 6-8As shown, it also includes two first connecting rods 25 symmetrically distributed vertically. The two first connecting rods 25 are detachably installed in two through holes on the left side of the first plate 41. The first plate 41 is detachably installed with two second connecting rods 26 symmetrically distributed vertically. When the required thickness of the chimney wall is different, first connecting rods 25 and second connecting rods 26 of different lengths can be produced for use. The second connecting rods 26 are located in adjacent through holes on the right side of the first plate 41. Three circumferentially evenly distributed locking pins 27 are slidably connected to the rear side of the first connecting rods 25. The inner side of the second connecting rods 26 is provided with circumferentially evenly distributed... The three grooves, the locking pin 27 and the adjacent groove on the second connecting rod 26 are limited to fit together. When the locking pin 27 extends from the adjacent first connecting rod 25 and enters the adjacent groove on the corresponding second connecting rod 26, the first connecting rod 25 and the corresponding second connecting rod 26 are locked together, so that the two corresponding first steel plates 4 will not be squeezed and displaced by the concrete between them. The first connecting rod 25 is provided with a cavity, and the cavity of the first connecting rod 25 is filled with liquid and slidably connected with a pressure rod 28. When the pressure rod 28 is moved, the liquid in the cavity of the first connecting rod 25 drives the three adjacent locking pins 27 to move.

[0048] like Figure 9 As shown, a limiting rod 29 is slidably connected to the upper side of the front part of the first connecting rod 25. A spring is provided between the limiting rod 29 and the adjacent first connecting rod 25. The spring is used to insert the adjacent limiting rod 29 into the groove of the adjacent injection rod 28. The injection rod 28 is provided with a groove that is limited and matched with the adjacent limiting rod 29. When the limiting rod 29 is inserted into the groove of the adjacent injection rod 28, the injection rod 28 cannot move forward.

[0049] When fixing the two corresponding first steel plates 4 of this device, the first connecting rod 25 is inserted into the corresponding second connecting rod 26 of this device, and then the adjacent injection rod 28 is pushed backward. The injection rod 28 moves the three adjacent locking pins 27 by squeezing the liquid in the adjacent first connecting rod 25. The locking pins 27 are inserted into the grooves of the corresponding second connecting rod 26, thereby connecting the two corresponding first steel plates 4. When the injection rod 28 moves to the point where its groove is aligned with the adjacent limiting rod 29, the limiting rod 29 is inserted into the groove of the adjacent injection rod 28 under the action of the adjacent spring, thereby preventing the injection rod 28 from shifting and causing the locking pins 27 to reset. When it is necessary to separate the two corresponding first steel plates 4, the limiting rod 29 is moved upward. The limiting rod 29 moves upward and compresses the adjacent spring. At the same time, the limiting rod 29 releases the limiting of the adjacent injection rod 28, and then the injection rod 28 is moved forward to reset the three adjacent locking pins 27. At this time, the two corresponding first steel plates 4 can be separated.

[0050] Example 3: Based on Example 2, a method for using a steel formwork flap structure for a power plant chimney, based on the above-mentioned steel formwork flap structure for a power plant chimney, includes the following steps:

[0051] S1: First, adjust the angle between the first steel plate 4 and the symmetrically distributed second steel plates 6 according to the diameter of the construction chimney. When adjusting the angle, rotate the first threaded rod 12 so that the first threaded rod 12 drives the connecting frame 13 to move. The connecting frame 13 drives the adjacent first sliding rod 8 to move. The first sliding rod 8 pushes the adjacent second steel plate 6 to rotate.

[0052] S2: While the second steel plate 6 is rotating, the connecting frame 13 pushes the symmetrically distributed fourth sliding rod 17 and the centrally symmetrically distributed sixth fixed rod 21 to move. The fourth sliding rod 17 and the sixth fixed rod 21 respectively drive the adjacent third sliding rod 15 and the fifth fixed rod 19 to move. The third sliding rod 15 and the fifth fixed rod 19 respectively push the adjacent second plate 42 and fourth plate 62 to move.

[0053] S3: After adjustment, separate the first steel plate 4 from the mounting base 3 and the second hydraulic rod 5, and then use several adjusted upper parts of this device to form two rings for pouring the first layer of concrete.

[0054] S4: After the two rings of this device are placed, the corresponding first steel plates 4 are fixed together by long bolts and nuts. The two adjacent devices are fixed together by turning the second threaded sleeve 23 so that the second threaded rod 22 on one device is located between the adjacent evenly distributed fixed plates 24 on the other adjacent device. Then the second threaded sleeve 23 is rotated so that the second threaded sleeve 23 presses the adjacent evenly distributed fixed plates 24 on the adjacent devices to fix them.

[0055] S5: After the two rings of this device are installed, steel bars and concrete are placed in the cavity between the two rings of this device to form the chimney body. After the concrete reaches a certain strength, the two rings of this device are removed. Then, the fixing seat 1 is fixed on the hole left in the first layer of concrete. Then, the first steel plate 4 is reconnected to the mounting seat 3 and the second hydraulic rod 5 to pour the second layer.

[0056] S6: After the second layer is poured and reaches a certain strength, the second hydraulic rod 5 drives the first steel plate 4 to move, thereby separating the first steel plate 4 and the symmetrically distributed second steel plates 6 from the concrete. Then, the first hydraulic rod 2 is activated, and the first hydraulic rod 2 extends to push the mounting base 3 and the first steel plate 4 to move upward to pour the third layer of concrete.

[0057] S7: After the third layer of concrete is poured, the fixing seat 1 is separated from the first layer of concrete. Then the first hydraulic rod 2 is activated. The first hydraulic rod 2 is shortened and drives the fixing seat 1 to move upward. Then the fixing seat 1 is fixed at the hole left in the second layer of concrete. After that, the first steel plate 4 is separated from the third layer of concrete and moves upward to pour the fourth layer.

[0058] S8: The above process is repeated alternately until the entire chimney is poured. After the chimney is poured, the device is removed from the chimney and recycled.

[0059] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A steel formwork flap structure for a power plant chimney, comprising a fixed base (1), wherein the fixed base (1) is provided with symmetrically and evenly distributed through holes, a first hydraulic rod (2) is fixedly connected to the fixed base (1), and an mounting base (3) is slidably connected to the fixed base (1). The telescopic end of the first hydraulic rod (2) is fixedly connected to the mounting base (3), and a first steel plate (4) is slidably connected to the mounting base (3). The first steel plate (4) is provided with symmetrically and evenly distributed through holes, wherein the symmetrically and evenly distributed through holes on the first steel plate (4) correspond one-to-one with the symmetrically and evenly distributed through holes on the fixed base (1). A second hydraulic rod (5) is fixedly connected to the mounting base (3), and the telescopic end of the first steel plate (4) is fixedly connected to the second hydraulic rod (5). The structure is characterized in that: It also includes symmetrically distributed second steel plates (6), each of which is rotatably connected to the first steel plate (4). The first steel plate (4) is hinged to symmetrically distributed first fixed shells (7), and each of the opposite sides of the symmetrically distributed first fixed shells (7) is slidably connected to a first sliding rod (8). The first sliding rod (8) is hinged to the adjacent second steel plate (6). The first steel plate (4) is fixedly connected to a symmetrically distributed second fixed shell (9), the second fixed shell (9) is slidably connected to a second sliding rod (10), the second sliding rod (10) and the adjacent second fixed shell (9) are filled with liquid, the first sliding rod (8) and the adjacent first fixed shell (7) are filled with liquid, the second fixed shell (9) and the adjacent first fixed shell (7) are connected by a hose, the first steel plate (4) is fixedly connected to a first threaded sleeve (11), the first threaded sleeve (11) is threadedly connected to a first threaded rod (12), the symmetrically distributed second sliding rods (10) are jointly fixedly connected to a connecting frame (13), the first threaded rod (12) and the connecting frame (13) are rotatably connected; The first steel plate (4) is composed of a first plate (41) and symmetrically distributed second plates (42). The symmetrically distributed second plates (42) are all slidably connected to the first plate (41). The second steel plate (6) is composed of a third plate (61) and a fourth plate (62). The third plate (61) and the fourth plate (62) are slidably connected. The third plate (61) is rotatably connected to the adjacent second plate (42). The first fixed shell (7) is hinged to the adjacent second plate (42). The first sliding rod (8) is hinged to the adjacent third plate (61). The first plate (41) is fixedly connected to a centrally symmetrically distributed third fixed shell (14). The third fixed shell (14) is slidably connected to a third sliding rod (15) fixedly connected to the adjacent second plate (42). Liquid is injected between the third sliding rod (15) and the adjacent third fixed shell (14). The first plate (41) is fixedly connected to a symmetrically distributed fourth fixed shell (16). The fourth fixed shell (16) is slidably connected to a fourth sliding rod (17) fixedly connected to the connecting frame (13). Liquid is injected between the fourth sliding rod (17) and the adjacent fourth fixed shell (16). A hose connects the fourth fixed shell (16) and the adjacent third fixed shell (14). The third plate (61) is fixedly connected to a fifth fixed shell (18), the fifth fixed shell (18) is slidably connected to a fifth fixed rod (19) fixedly connected to the adjacent fourth plate (62), the fifth fixed rod (19) and the adjacent fifth fixed shell (18) are filled with liquid, the first plate (41) is fixedly connected to a centrally symmetrically distributed sixth fixed shell (20), the sixth fixed shell (20) is slidably connected to a sixth fixed rod (21) fixedly connected to the connecting frame (13), the sixth fixed rod (21) and the adjacent sixth fixed shell (20) are filled with liquid, the sixth fixed shell (20) and the adjacent fifth fixed shell (18) are connected by a hose.

2. The steel formwork flap structure for a power plant chimney according to claim 1, characterized in that: The length of the first steel plate (4) is twice the length of the second steel plate (6), which is used to make the device form a uniform cavity.

3. The steel formwork flap structure for a power plant chimney according to claim 2, characterized in that: The sixth fixed shell (20) is the same as the fourth fixed shell (16), the fifth fixed shell (18) is the same as the third fixed shell (14), the fifth fixed rod (19) is the same as the third sliding rod (15), the sixth fixed rod (21) is the same as the fourth sliding rod (17), and the relative sliding range between the fourth plate (62) and the third plate (61) is equal to the relative sliding range between the second plate (42) and the first plate (41).

4. The steel formwork flap structure for a power plant chimney according to claim 3, characterized in that: The fourth plate (62) on one side is rotatably connected to a symmetrically distributed second threaded rod (22), and the second threaded rod (22) is threadedly connected to a second threaded sleeve (23). The fourth plate (62) on the other side is fixedly connected to a symmetrically and evenly distributed fixing plate (24), and the evenly distributed fixing plate (24) is pressed into the corresponding second threaded sleeve (23).

5. The steel formwork flap structure for a power plant chimney according to claim 4, characterized in that: It also includes symmetrically distributed first connecting rods (25), which are detachably installed in adjacent through holes of the first plate (41). The first plate (41) is detachably installed with symmetrically distributed second connecting rods (26), which are located in adjacent through holes of the first plate (41). The first connecting rods (25) are slidably connected with circumferentially evenly distributed locking pins (27). The second connecting rods (26) are provided with circumferentially evenly distributed grooves. The locking pins (27) are limited to the adjacent grooves on the second connecting rods (26). The first connecting rods (25) are provided with cavities. Liquid is injected into the cavities of the first connecting rods (25), and a pressure injection rod (28) is slidably connected to them.

6. The steel formwork flap structure for a power plant chimney according to claim 5, characterized in that: The first connecting rod (25) is slidably connected to the limiting rod (29). A spring is provided between the limiting rod (29) and the adjacent first connecting rod (25). The injection rod (28) is provided with a groove that is limited and engaged with the adjacent limiting rod (29).

7. A method for using a steel formwork flap structure for a power plant chimney, characterized in that, The steel formwork flap structure for power plant chimneys according to claim 6 is used in the following specific way: S1: First, adjust the angle between the first steel plate (4) and the symmetrically distributed second steel plate (6) according to the diameter of the construction chimney. When adjusting the angle, rotate the first threaded rod (12) so that the first threaded rod (12) drives the connecting frame (13) to move. The connecting frame (13) drives the adjacent first sliding rod (8) to move. The first sliding rod (8) pushes the adjacent second steel plate (6) to rotate. S2: While the second steel plate (6) rotates, the connecting frame (13) pushes the symmetrically distributed fourth sliding rod (17) and the centrally symmetrically distributed sixth fixed rod (21) to move. The fourth sliding rod (17) and the sixth fixed rod (21) respectively drive the adjacent third sliding rod (15) and the fifth fixed rod (19) to move. The third sliding rod (15) and the fifth fixed rod (19) respectively push the adjacent second plate (42) and the fourth plate (62) to move. S3: After adjustment, separate the first steel plate (4) from the mounting base (3) and the second hydraulic rod (5), and then use several adjusted upper parts of the device to form two rings for pouring the first layer of concrete; S4: After the two rings of this device are placed, the corresponding first steel plates (4) are fixed together by long bolts and nuts. The two adjacent devices are fixed together by turning the second threaded sleeve (23) so that the second threaded rod (22) on one device is located between the adjacent and evenly distributed fixed plates (24) on the other adjacent device. Then the second threaded sleeve (23) is rotated so that the second threaded sleeve (23) presses the adjacent and evenly distributed fixed plates (24) on the adjacent devices to fix them. S5: After the two rings of this device are installed, steel bars and concrete are placed in the cavity between the two rings of this device to form the chimney body. When the concrete reaches a certain strength, the two rings of this device are removed. Then the fixing seat (1) is fixed on the hole left by the first layer of concrete. Then the first steel plate (4) is reconnected with the mounting seat (3) and the second hydraulic rod (5) to pour the second layer. S6: After the second layer is poured and reaches a certain strength, the second hydraulic rod (5) drives the first steel plate (4) to move, thereby separating the first steel plate (4) and the symmetrically distributed second steel plate (6) from the concrete. Then, the first hydraulic rod (2) is activated, and the first hydraulic rod (2) extends to push the mounting base (3) and the first steel plate (4) to move upward to pour the third layer of concrete. S7: After the third layer of concrete is poured, the fixed seat (1) is separated from the first layer of concrete. Then the first hydraulic rod (2) is started. The first hydraulic rod (2) is shortened and drives the fixed seat (1) to move upward. Then the fixed seat (1) is fixed at the hole left by the second layer of concrete. After that, the first steel plate (4) is separated from the third layer of concrete and moved upward to pour the fourth layer. S8: The above process is repeated alternately until the entire chimney is poured. After the chimney is poured, the device is removed from the chimney and recycled.

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