A cavity-type fan foundation formwork support system

Abstract

The present invention discloses a cavity-type fan foundation formwork support system in the technical field of fan installation, which includes a plurality of inner formworks and a plurality of outer formworks. The plurality of inner formworks and the plurality of outer formworks together form a complete annular cavity; the first fixing mechanism is coaxial with the annular cavity and is located inside the annular cavity. The first fixing mechanism is used to support and fix each inner formwork in a spliced state to complete the demolding of the inner formwork; the second demolding mechanism is located above the outer formwork and is used to remove the outer formwork in a spliced state after pouring to complete the demolding of the outer formwork; the driving mechanism is located above the inner formwork and provides driving force for the first fixing mechanism, the second fixing mechanism, the first demolding mechanism and the second demolding mechanism; the device is simple to operate and convenient to use, can quickly complete the fixed installation of a plurality of inner formworks and a plurality of outer formworks, and can automatically complete the disassembly of a plurality of inner formworks and a plurality of outer formworks without the need for external force.

Description

Technical Field

[0001] The present invention relates to the technical field of fan installation, and specifically relates to a cavity-type fan foundation formwork support system. Background Art

[0002] When installing a cavity-type fan, a fan foundation is required as its installation foundation. Therefore, the fan foundation needs to be poured before installing the fan; before pouring the existing fan foundation, the formwork needs to be erected first. After the formwork is erected, each formwork also needs to be fixed one by one. When fixing, fixing devices such as support frames or support rods usually need to be additionally installed on the ground to fix the formwork; when removing the formwork after the fan foundation solidifies, the worker needs to first remove the fixing parts of each formwork in sequence, and then the formwork needs to be removed by applying external force to the formwork. The operations of fixing and removing the formwork are cumbersome, time-consuming and laborious. Summary of the Invention

[0003] The purpose of the present invention is to provide a cavity-type fan foundation formwork support system to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A cavity-type fan foundation formwork support system includes a plurality of inner formworks and a plurality of outer formworks.

[0005] The plurality of inner formworks and the plurality of outer formworks together form a complete annular cavity.

[0006] A first fixing mechanism, coaxial with the annular cavity and located inside the annular cavity, the first fixing mechanism is used to support and fix each inner formwork in a spliced state.

[0007] A second fixing mechanism, coaxial with the annular cavity and located outside the annular cavity, the second fixing mechanism is used to support and fix each outer formwork in a spliced state.

[0008] A first demolding mechanism, located inside the inner formwork, is used to remove the inner formwork in a spliced state after pouring is completed, and complete the demolding of the inner formwork.

[0009] A second demolding mechanism, located above the outer formwork, is used to remove the outer formwork in a spliced state after pouring is completed, and complete the demolding of the outer formwork.

[0010] A driving mechanism, located above the inner formwork, provides driving force for the first fixing mechanism, the second fixing mechanism, the first demolding mechanism and the second demolding mechanism.

[0011] Preferably, the first fixing mechanism includes a plurality of partition plates. The number of the partition plates is equal to the number of the inner molds, and the partition plates and the inner molds are distributed at intervals. The partition plates are in close contact with two adjacent inner molds. The thickness of the partition plates is equal to the thickness of the inner molds. The inner side length of the partition plates is greater than the outer side length. The inner side length of the inner molds is less than the outer side length.

[0012] Preferably, the first demolding mechanism includes a bidirectional threaded rod. The bidirectional threaded rod is located at the central axis position of the ring formed by a plurality of inner molds and a plurality of partition plates, and the bidirectional threaded rod has self-locking property. Symmetrically threaded connections are arranged on the upper and lower sides of the bidirectional threaded rod with first driving blocks. Four first link rods are arranged on each first driving block, and one ends of the four first link rods are rotatably connected thereto. The other ends of the four first link rods are respectively rotatably connected to four partition plates. A third demolding mechanism is arranged on the bidirectional threaded rod. The third demolding mechanism is used for driving the four inner molds to be separated from the fan foundation after the four partition plates are separated from the fan foundation.

[0013] Preferably, the third demolding mechanism includes two second driving blocks which are symmetrically distributed on the upper and lower sides of the bidirectional threaded rod. The distance between the two second driving blocks is less than the distance between the two first driving blocks. A vertical sliding groove is formed on the surface of the bidirectional threaded rod. A rotating ring is rotatably connected to the inner side position of the second driving block, and the rotating ring is slidably connected to the sliding groove on the surface of the bidirectional threaded rod. Four second link rods are arranged on each second driving block, and one ends of the four second link rods are rotatably connected thereto. The other ends of the four second link rods are respectively rotatably connected to four inner molds. A first spring is arranged between the two second driving blocks, and two ends of the first spring are respectively fixedly connected to the two second driving blocks.

[0014] Preferably, the second fixing mechanism includes a plurality of hinges. The number of the hinges is equal to the number of the outer molds, and the plurality of hinges and the plurality of outer molds are distributed at intervals. The hinges are located at the bottom of the outer molds, and the hinges are hinged to two adjacent outer molds.

[0015] Preferably, the second demolding mechanism includes a fixed disk. Four fixing rods are fixedly connected above the fixed disk, and a lifting frame is arranged above the four fixing rods. The lifting frame is slidably connected to the four fixing rods, and a plurality of fourth link rods are rotatably connected to the lifting frame. A plurality of limiting rods are fixedly connected to the side of the fixed disk. The number of the limiting rods is equal to the number of the fourth link rods and the number of the outer molds. A sliding rod is slidably connected to the limiting rods, and the other end of the fourth link rod is rotatably connected to the sliding rod. A clamping block is fixedly connected to the bottom of the outer side end of the sliding rod. A clamping rod is arranged above the outer mold and is fixedly connected to the outer mold, and the clamping block is in clamping cooperation with the clamping rod.

[0016] Preferably, the driving mechanism includes a first motor, which is fixedly connected to the fixed disk, and a worm is fixedly connected to the output end of the first motor; a worm gear is rotatably connected to the fixed disk, the worm is engaged with the worm gear, and the worm gear is fixedly connected to the bidirectional threaded rod; a support disk is rotatably connected to the upper end of the worm gear, a first cylinder is fixedly connected above the support disk, and the upper end of the first cylinder is fixedly connected to the lifting frame.

[0017] Preferably, a fixing ring is provided between two adjacent sliding rods, and an electric clamp is slidably connected inside the fixing ring; a second cylinder is fixedly connected to the outer surface of the fixing ring, and the telescopic end of the second cylinder is fixedly connected to the electric clamp; telescopic shafts are fixedly connected to both ends of the fixing ring close to the two sliding rods, and the telescopic shafts are rotatably connected to the sliding rods; a universal joint is provided at the bottom of the sliding rod, and the universal joint is connected to the two telescopic shafts at the bottom of the sliding rod; a second motor is fixedly connected to several sliding rods, a first pulley is fixedly connected to the output end of the second motor, a second pulley is fixedly connected to the telescopic shaft at the bottom of the first pulley, and a belt is provided on the second pulley, and the belt is engaged with the first pulley and the second pulley at the same time.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. In the present invention, first, a plurality of inner molds are assembled into an annular shape, and then the plurality of inner molds are fixed by the first fixing mechanism. Then, a plurality of outer molds are assembled into a larger annular shape outside the inner molds, and then the plurality of outer molds can be quickly fixed at one time by the second fixing mechanism, without the need for an additional installation support frame, and the operation is relatively convenient.

[0020] 2. After the concrete solidifies, all the inner molds and all the outer molds need to be removed. By starting the driving mechanism, the first demolding mechanism and the second demolding mechanism can be driven to operate, and the first demolding mechanism and the second demolding mechanism can automatically remove all the inner molds and outer molds from the solidified fan foundation; the device can automatically and quickly complete the disassembly of a plurality of inner molds and a plurality of outer molds without the need for external force. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the bottom view structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the disassembled structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the driving mechanism in the present invention;

[0025] Figure 5 This is a schematic structural diagram of the second demolding mechanism in the present invention;

[0026] Figure 6 This is a schematic structural diagram of the first demolding mechanism in the present invention;

[0027] Figure 7 This is a schematic principle diagram of the first demolding mechanism in the present invention;

[0028] Figure 8 This is a schematic principle diagram of the third demolding mechanism in the present invention.

[0029] In the attached drawings, the components represented by each reference numeral are as follows:

[0030] 1. Inner mold; 2. Outer mold; 3. Partition board; 4. Bi-directional threaded rod; 5. First driving block; 6. First connecting rod; 7. Second driving block; 8. Rotating ring; 9. Second connecting rod; 10. First spring; 11. Hinge; 25. Fixed disk; 26. Fixed rod; 27. Lifting frame; 28. Fourth connecting rod; 29. Limiting rod; 30. Sliding rod; 31. Clamping block; 32. Clamping rod; 34. First motor; 35. Worm; 36. Worm gear; 37. Support disk; 38. First cylinder; 39. Fixed ring; 40. Electric clamp; 41. Second cylinder; 42. Telescopic shaft; 43. Universal joint; 44. Second motor; 45. First pulley; 46. Second pulley; 47. Belt. Detailed implementation manners

[0031] To further understand the content of the present invention, the present invention will be described in detail with reference to the attached drawings.

[0032] Please refer to Figures 1 - 8 , the present invention provides a technical solution: a cavity-type fan foundation formwork support system, including:

[0033] A plurality of inner molds 1 and a plurality of outer molds 2, and the plurality of inner molds 1 and the plurality of outer molds 2 together form a complete annular cavity;

[0034] A first fixing mechanism, coaxial with the annular cavity and located inside the annular cavity, and the first fixing mechanism is used to support and fix each inner mold 1 in a spliced state;

[0035] A second fixing mechanism, coaxial with the annular cavity and located outside the annular cavity, and the second fixing mechanism is used to support and fix each outer mold 2 in a spliced state;

[0036] A first demolding mechanism, located inside the inner mold 1, and is used to remove the inner mold 1 in a spliced state after pouring is completed, and complete the demolding of the inner mold 1;

[0037] The second demolding mechanism is located on the upper side of the outer mold 2 and is used to remove the outer mold 2 in a spliced state after pouring is completed, thereby completing the demolding of the outer mold 2.

[0038] The driving mechanism is located on the upper side of the inner mold 1 and provides driving force for the first fixing mechanism, the second fixing mechanism, the first demolding mechanism, and the second demolding mechanism.

[0039] During operation, when pouring the fan foundation of the fan, first assemble multiple inner molds 1 into an annular shape, then fix the multiple inner molds 1 through the first fixing mechanism. Next, assemble multiple outer molds 2 into a larger annular shape at the outer side position of the inner molds 1, and then fix the multiple outer molds 2 through the second fixing mechanism. At this time, concrete can be poured into the interlayer between the inner mold 1 and the outer mold 2, and wait for the concrete to solidify after pouring; after the concrete solidifies, all the inner molds 1 and all the outer molds 2 need to be removed at this time. By starting the driving mechanism, the first demolding mechanism and the second demolding mechanism can be driven to operate, and the first demolding mechanism and the second demolding mechanism can automatically disassemble all the inner molds 1 and all the outer molds 2 from the solidified fan foundation; this device is simple to operate and convenient to use, can quickly complete the fixed installation of multiple inner molds 1 and multiple outer molds 2, and can automatically complete the disassembly of multiple inner molds 1 and multiple outer molds 2 at the same time.

[0040] As Figures 2 - 3 shown, as a further solution of the present invention, the first fixing mechanism includes multiple partition plates 3. The number of partition plates 3 is equal to the number of inner molds 1, and the partition plates 3 are distributed at intervals with the inner molds 1, and the partition plates 3 are in close contact with two adjacent inner molds 1; the thickness of the partition plates 3 is equal to the thickness of the inner molds 1, the inner side length of the partition plates 3 is greater than the outer side length; the inner side length of the inner molds 1 is less than the outer side length.

[0041] During operation, by placing multiple partition plates 3 at intervals between two adjacent inner molds 1, at this time, the multiple partition plates 3 and the multiple inner molds 1 form an annular shape. The inner molds 1 cannot move inward under the extrusion of the partition plates 3. At the same time, since the outer part of the inner molds 1 is in contact with the fan foundation, the inner molds 1 cannot move outward either. Therefore, the inner molds 1 will be in a fixed state; when it is necessary to disassemble the inner molds 1, move the partition plates 3 inward to separate from the inner molds 1, and at this time, the inner molds 1 can move inward and separate from the fan foundation after losing the extrusion of the partition plates 3.

[0042] As Figures 6 - 8As shown in the figure, as a further solution of the present invention, the first demolding mechanism includes a bidirectional threaded rod 4, which is located at the central axis position of the ring formed by a plurality of inner molds 1 and a plurality of partition plates 3, and the bidirectional threaded rod 4 has self-locking property; symmetrically threaded connections are provided on the upper and lower sides of the bidirectional threaded rod 4 with first driving blocks 5, and four first link rods 6 are provided on the first driving blocks 5, with one end of each of the four first link rods 6 rotatably connected thereto, and the other ends of the four first link rods 6 are respectively rotatably connected to the four partition plates 3; a third demolding mechanism is provided on the bidirectional threaded rod 4, and the third demolding mechanism is used to drive the four inner molds 1 to separate from the fan foundation after the four partition plates 3 are separated from the fan foundation;

[0043] The third demolding mechanism includes two second driving blocks 7, and the two second driving blocks 7 are symmetrically distributed on the upper and lower sides of the bidirectional threaded rod 4; the distance between the two second driving blocks 7 is less than the distance between the two first driving blocks 5; vertical sliding grooves are formed on the surface of the bidirectional threaded rod 4, and a rotating ring 8 is rotatably connected to the inner side position of the second driving block 7, and the rotating ring 8 is slidably connected to the sliding groove on the surface of the bidirectional threaded rod 4; four second link rods 9 are provided on the second driving blocks 7, with one end of each of the four second link rods 9 rotatably connected thereto, and the other ends of the four second link rods 9 are respectively rotatably connected to the four inner molds 1; a first spring 10 is provided between the two second driving blocks 7, and both ends of the first spring 10 are fixedly connected to the two second driving blocks 7;

[0044] During operation, when the partition plate 3 is in contact with the inner mold 1, at this time, the first driving block 5 remains stationary under the action of the bidirectional threaded rod 4, and the first driving block 5 can ensure that the partition plate 3 is stably in contact with the inner mold 1 through the first link rod 6; when it is necessary to disassemble the inner mold 1, by driving the bidirectional threaded rod 4 to rotate, the bidirectional threaded rod 4 will drive the first driving blocks 5 on the upper and lower sides to move towards each other at the same time. At this time, when the two first driving blocks 5 move, they will pull the partition plate 3 to move inwards through the first link rod 6, and the partition plate 3 will gradually separate from the fan foundation and the inner mold 1; when the first driving block 5 moves a certain distance, it will contact the second driving block 7. As the bidirectional threaded rod 4 continues to rotate, the first driving block 5 will push the second driving block 7 to move, and the two second driving blocks 7 on the upper and lower sides will move towards each other at this time. When the two second driving blocks 7 move, they will pull the inner mold 1 to move inwards through the second link rod 9, and when the inner mold 1 moves, it will separate from the fan foundation.

[0045] As Figures 1 - 3 shown in the figure, as a further solution of the present invention, the second fixing mechanism includes a plurality of hinges 11, the number of hinges 11 is equal to the number of outer molds 2, and the plurality of hinges 11 and the plurality of outer molds 2 are spaced apart; the hinges 11 are located at the bottom of the outer mold 2 and the hinges 11 are hinged to two adjacent outer molds 2;

[0046] During operation, before pouring, the bottom sides of multiple outer molds 2 can be connected to each other through multiple hinges 11. At this time, just place the multiple outer molds 2 at the pouring position; the multiple hinges 11 can achieve the effect of connecting the multiple outer molds 2 together.

[0047] As Figures 3 - 4 shown, as a further solution of the present invention, the second demolding mechanism includes a fixed disk 25. Four fixed rods 26 are fixedly connected above the fixed disk 25, and a lifting frame 27 is provided above the four fixed rods 26. The lifting frame 27 is slidably connected to the four fixed rods 26, and a number of fourth connecting rods 28 are rotatably connected to the lifting frame 27; a number of limiting rods 29 are fixedly connected to the side position of the fixed disk 25. The number of the limiting rods 29 is equal to the number of the fourth connecting rods 28 and the outer molds 2; a sliding rod 30 is slidably connected to the limiting rod 29. The other end of the fourth connecting rod 28 is rotatably connected to the sliding rod 30; a clamping block 31 is fixedly connected to the bottom position of the outer end of the sliding rod 30; a clamping rod 32 is provided above the outer mold 2 and is fixedly connected to the outer mold 2. The clamping block 31 is in clamping fit with the clamping rod 32;

[0048] During operation, when it is necessary to remove the outer mold 2, drive all the sliding rods 30 to slide outward. When the sliding rod 30 slides, it drives the clamping block 31 connected thereto to move. When the clamping block 31 moves, it will push the upper part of the outer mold 2 to expand outward through the clamping rod 32. When the upper part of the outer mold 2 expands outward, at this time, the outer mold 2 will be separated from the fan foundation to achieve the purpose of demolding.

[0049] As Figures 3 - 4 shown, as a further solution of the present invention, the driving mechanism includes a first motor 34. The first motor 34 is fixedly connected to the fixed disk 25, and a worm 35 is fixedly connected to the output end of the first motor 34; a worm gear 36 is rotatably connected to the middle position of the fixed disk 25. The worm 35 is meshed with the worm gear 36, and the worm gear 36 is fixedly connected to the bidirectional threaded rod 4; a support disk 37 is rotatably connected to the upper end of the worm gear 36. A first cylinder 38 is fixedly connected above the support disk 37. The upper end of the first cylinder 38 is fixedly connected to the lifting frame 27;

[0050] During operation, when the first motor 34 is started, the first motor 34 drives the worm 35 to rotate. When the worm 35 rotates, it drives the worm wheel 36 to rotate. The worm wheel 36 drives the bidirectional threaded rod 4 to rotate. When the bidirectional threaded rod 4 rotates, it drives the two first driving blocks 5 connected to it to move. Since the clamping block 31 is in a clamped state with the clamping rod 32 at this time, the fixed disk 25 is in a fixed state at this time. The bidirectional threaded rod 4 is arranged on the fixed disk 25, so the bidirectional threaded rod 4 will always remain in the central position inside the fan foundation unchanged. When the bidirectional threaded rod 4 drives the first driving block 5 to move, the first driving block 5 will pull the four partitions 3 towards the central position through the four first connecting rods 6. When the first driving block 5 pushes the second driving block 7 to move, the second driving block 7 will pull the four inner molds 1 towards the central position through the four second connecting rods 9 respectively, so that the demolding of the inner mold 1 and the partition 3 can be completed. The bidirectional threaded rod 4 is fixed in the middle position inside the fan foundation through the fixed disk 25, and the bidirectional threaded rod 4 can provide the force required for the demolding of the inner mold 1.

[0051] When all four partitions 3 and four inner molds 1 are separated from the fan foundation, start the first motor 34 to drive the worm 35 to rotate in the reverse direction, which can make the four inner molds 1 and the four partitions 3 successively abut against the inner wall of the fan foundation again. When the inner mold 1 and the partition 3 abut against the inner wall of the fan foundation, the bidirectional threaded rod 4 will be fixed in the middle position inside the fan foundation due to the inner mold 1. Then stop the first motor 34 and start the first cylinder 38 to drive the lifting frame 27 to move downward. When the lifting frame 27 moves downward, it will push the multiple sliding rods 30 to slide outward through the multiple fourth connecting rods 28 connected to the lifting frame 27. The sliding rod 30 pushes the clamping rod 32 to move outward through the clamping block 31, and the clamping rod 32 will drive the upper part of the outer mold 2 to expand outward, and the outer mold 2 will be separated from the fan foundation. Since the bidirectional threaded rod 4 is fixed in the middle position inside the fan foundation, the fixed disk 25 connected to the bidirectional threaded rod 4 will also be fixed in the middle position, so the force required for the demolding of the outer mold 2 can be provided.

[0052] As Figure 5As shown in the figure, as a further solution of the present invention, a fixed ring 39 is provided between adjacent two sliding rods 30. An electric clamp 40 is slidably connected inside the fixed ring 39. A second cylinder 41 is fixedly connected to the outer surface of the fixed ring 39, and the telescopic end of the second cylinder 41 is fixedly connected to the electric clamp 40. Fixed connection is made at both ends of the fixed ring 39 close to the two sliding rods 30 with telescopic shafts 42, and the telescopic shafts 42 are rotatably connected to the sliding rods 30. A universal joint 43 is provided at the bottom of the sliding rod 30, and the universal joint 43 is connected to the two telescopic shafts 42 at the bottom of the sliding rod 30. A second motor 44 is fixedly connected to several sliding rods 30, a first pulley 45 is fixedly connected to the output end of the second motor 44, a second pulley 46 is fixedly connected to the telescopic shaft 42 located at the bottom of the first pulley 45, and a belt 47 is provided on the second pulley 46, and the belt 47 is meshed with both the first pulley 45 and the second pulley 46 at the same time.

[0053] During operation, before starting to pour the fan foundation, insert multiple cable anchor sleeves into the electric clamp 40 and keep the top ends of the cable anchor sleeves located at the bottom side part of the electric clamp 40, and then clamp the cable anchor sleeves through the electric clamp 40. At this time, start several second motors 44 simultaneously according to the inclination angle required by the cable anchor sleeves. The second motors 44 drive the first pulleys 45 to rotate. The first pulleys 45 drive the second pulleys 46 to rotate through the belts 47. The second pulleys 46 will drive the telescopic shafts 42 connected to them to rotate. Multiple telescopic shafts 42 can drive all the fixed rings 39 to rotate through multiple universal joints 43. The fixed rings 39 will drive the cable anchor sleeves to rotate and incline through the electric clamps 40. When the cable anchor sleeves are inclined to a certain angle, stop the second motors 44 at this time and start pouring the fan foundation. When demoulding is required, first start the electric clamp 40 to loosen the cable anchor sleeves, and then start the second cylinder 41 to drive the electric clamp 40 to move upward to separate from the cable anchor sleeves.

Claims

1. A cavity type fan foundation template support system, comprising a plurality of inner molds (1) and a plurality of outer molds (2), characterized in that: The plurality of inner molds (1) and the plurality of outer molds (2) together form a complete annular cavity; A first fixing mechanism, coaxial with the annular cavity and located inside the annular cavity, the first fixing mechanism being used to support and fix each inner mold (1) in a spliced ​​state; A second fixing mechanism is coaxial with the annular cavity and is located outside the annular cavity, the second fixing mechanism being used to support and fix each outer mold (2) in a spliced ​​state; A first demoulding mechanism, located inside the inner mold (1), is used to remove the inner mold (1) after casting is completed and in a spliced ​​state, thereby completing demoulding of the inner mold (1); A second demoulding mechanism is located on the upper side of the outer mold (2) and is used to remove the outer mold (2) in a spliced ​​state after casting is completed, thereby completing the demoulding of the outer mold (2); A driving mechanism, located on the upper side of the inner mold (1), providing driving force to the first fixing mechanism, the second fixing mechanism, the first demoulding mechanism and the second demoulding mechanism; The second demoulding mechanism comprises a fixed plate (25), four fixed rods (26) are fixedly connected to the upper position of the fixed plate (25), and a lifting frame (27) is provided above the four fixed rods (26), the lifting frame (27) is slidably connected to the four fixed rods (26), and a plurality of fourth connecting rods (28) are rotatably connected to the lifting frame (27); a plurality of limiting rods (29) are fixedly connected to the side position of the fixed plate (25), and the number of the limiting rods (29) is equal to the number of the fourth connecting rods (28) and the outer mold (2); a sliding rod (30) is slidably connected to the limiting rod (29), and the other end of the fourth connecting rod (28) is rotatably connected to the sliding rod (30); a clamping block (31) is fixedly connected to the bottom position of one outer end of the sliding rod (30); a clamping rod (32) is provided above the outer mold (2), and the clamping rod (32) is fixedly connected to the outer mold (2), and the clamping block (31) is clamped and matched with the clamping rod (32); A fixing ring (39) is provided between two adjacent sliding rods (30), and an electric clamp (40) is slidably connected inside the fixing ring (39); a second cylinder (41) is fixedly connected to the outer surface of the fixing ring (39), and the telescopic end of the second cylinder (41) is fixedly connected to the electric clamp (40); the fixing ring (39) is fixedly connected to telescopic shafts (42) at both ends close to the two sliding rods (30), and the telescopic shaft (42) is rotatably connected to the sliding rod (30); a universal joint (42) is provided at the bottom of the sliding rod (30) 43), the universal joint (43) is connected to two telescopic shafts (42) at the bottom of the sliding rod (30); a second motor (44) is fixedly connected to a plurality of the sliding rods (30), the output end of the second motor (44) is fixedly connected to a first pulley (45), a second pulley (46) is fixedly connected to the telescopic shaft (42) at the bottom of the first pulley (45), and a belt (47) is provided on the second pulley (46), and the belt (47) is meshed with the first pulley (45) and the second pulley (46) at the same time.

2. According to claim 1, a cavity fan foundation formwork support system is characterized by: The first fixing mechanism comprises a plurality of partitions (3), the number of the partitions (3) being equal to the number of the inner moulds (1), the partitions (3) and the inner moulds (1) being spaced apart, the partitions (3) and the two adjacent inner moulds (1) being tightly fitted; the thickness of the partitions (3) being equal to the thickness of the inner moulds (1), the inner side length of the partitions (3) being greater than the outer side length; and the inner side length of the inner mould (1) being less than the outer side length.

3. A cavity type fan foundation formwork support system according to claim 2, characterized in that: The first demoulding mechanism comprises a bidirectional threaded rod (4), the bidirectional threaded rod (4) being located at the central axis position of a circular ring formed by the plurality of inner moulds (1) and the plurality of partitions (3), and the bidirectional threaded rod (4) is self-locking; the bidirectional threaded rod (4) is symmetrically threadedly connected to a first driving block (5) at upper and lower sides thereof, the first driving block (5) being provided with four first connecting rods (6) each having one end rotatably connected thereto, and the other ends of the four first connecting rods (6) are respectively rotatably connected to four partitions (3); the bidirectional threaded rod (4) is provided with a third demoulding mechanism, the third demoulding mechanism being used to drive the four inner moulds (1) to be detached from the fan base after the four partitions (3) are detached from the fan base.

4. A cavity type fan foundation formwork support system according to claim 3, characterized in that: The third demoulding mechanism comprises two second driving blocks (7), which are symmetrically distributed at the upper and lower sides of the bidirectional threaded rod (4); the distance between the two second driving blocks (7) is smaller than the distance between the two first driving blocks (5); a vertical sliding groove is provided on the surface of the bidirectional threaded rod (4), a rotating ring (8) is rotatably connected to the inner side of the second driving block (7), and the rotating ring (8) is slidably connected to the sliding groove on the surface of the bidirectional threaded rod (4); the second driving block (7) is provided with four second connecting rods (9) each of which is rotatably connected to the second driving block (7), and the other ends of the four second connecting rods (9) are rotatably connected to four inner molds (1) respectively; a first spring (10) is provided between the two second driving blocks (7), and the two ends of the first spring (10) are respectively fixedly connected to the two second driving blocks (7).

5. According to claim 1, a cavity type fan foundation formwork support system is characterized by: The second fixing mechanism comprises a plurality of hinges (11), the number of the hinges (11) being equal to the number of the outer moulds (2), and the plurality of hinges (11) and the plurality of outer moulds (2) being distributed at intervals; the hinge (11) is located at the bottom of the outer mould (2) and the hinge (11) is hingedly connected to two adjacent outer moulds (2).

6. The cavity type fan foundation formwork support system according to claim 1, characterized in that: The driving mechanism comprises a first motor (34), the first motor (34) being fixedly connected to a fixed disk (25), and a worm (35) being fixedly connected to an output end of the first motor (34); the fixed disk (25) being rotatably connected to a worm wheel (36), the worm (35) being meshed with the worm wheel (36), and the worm wheel (36) being fixedly connected to a bidirectional threaded rod (4); the upper end of the worm wheel (36) being rotatably connected to a support disk (37), the upper end of the support disk (37) being fixedly connected to a first cylinder (38), and the upper end of the first cylinder (38) being fixedly connected to a lifting frame (27).

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