Concrete pouring device for ultrahigh steel stand column and construction method

Abstract

The concrete pouring device comprises a winch, a support, a semicircular steel tank, a buffering mechanism and a vibrating mechanism, the winch is arranged at the top of the steel stand column, and a plurality of feeding ports distributed in the length direction of the steel stand column at intervals are formed in the side wall of the steel stand column; the support is located in the steel stand column, the winch is connected with the support through a lifting rope, the semicircular steel tank is obliquely fixed to the support, a tank opening of the semicircular steel tank faces the feeding port, the buffering mechanism is arranged in the semicircular steel tank, the vibrating mechanism is arranged on the support, and the lifting rope is arranged on the lifting rope. And a vibrating rod of the vibrating mechanism extends out of the bottom of the bracket. The device can avoid segregation caused by high-throwing concrete, is simple in structure, and improves the construction quality.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a concrete pouring device for an ultra-high steel column and a construction method. Background Art

[0002] In factories in the fields of metallurgy, electricity, etc., due to their large structural span, high columns, large longitudinal column spacing, large lifting weight of factory cranes and high frequency of use, the requirements for columns are relatively high. It is necessary to select appropriate column types to achieve a balance between reliability and economy of the structure. Ordinary concrete columns can no longer meet the actual needs of the project, so high-performance columns are required. Steel tube concrete columns were gradually proposed in China, and led by relevant research institutes, many units and universities carried out research. Later, steel tube concrete was included in the national scientific plan and was widely used in the domestic construction industry.

[0003] Concrete-filled steel tube columns are square or round steel columns filled with concrete, which effectively improves the compressive capacity of concrete, so as to reduce the size and material consumption of the column. When this type of column is under load and pressure, the outer shell of the steel column provides annular constraints, that is, it provides considerable lateral constraint pressure, forming a composite force form of three-way compression, which significantly improves the compressive strength of the composite column. Existing steel column concrete pouring generally adopts direct pouring or pumping jacking method. The direct pouring method is to set up a pouring hole on the top of the steel column and pour concrete from the top of the pouring hole to the bottom. This process requires the construction platform to be set up, the amount of high-altitude work is large, and the safety risk is high; at the same time, pouring concrete from a high place to the bottom, that is, high-throw concrete, is very easy to produce segregation, and the quality cannot be guaranteed. It is not suitable for the concrete pouring of ultra-high steel columns. The pumping jacking method uses a concrete pump to pump concrete from bottom to top, but the pouring of concrete for ultra-high steel columns requires a higher pumping pressure, which places extremely high demands on the quality of the pump and feed port interface, and has high mechanical costs. At the same time, the higher pumping pressure can easily lead to pressure seepage of the concrete, resulting in the strength not meeting the requirements, and the quality cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a concrete pouring device and construction method for ultra-high steel columns which can avoid segregation caused by high-throw concrete, have a simple structure and improve construction quality.

[0005] The present invention is achieved through the following technical solutions: a device for pouring concrete for super-high steel columns, comprising a winch, a bracket, a semicircular steel trough, a buffer mechanism, and a vibrating mechanism, wherein the winch is arranged at the top of the steel column, the side wall of the steel column is provided with a plurality of feed ports spaced apart along its length direction, the bracket is located inside the steel column, the winch is connected to the bracket through a suspension rope, the semicircular steel trough is obliquely fixed on the bracket, the notch of the semicircular steel trough faces the feed port, the buffer mechanism is arranged in the semicircular steel trough, the vibrating mechanism is arranged on the bracket, and the vibrating rod of the vibrating mechanism extends out of the bottom of the bracket.

[0006] Furthermore: the distance between two adjacent feed ports is 10m-20m.

[0007] Furthermore: the buffer mechanism includes a baffle, a transmission rod, a bidirectional motor, and a pressure sensor. There are multiple baffles, and the pressure sensor is arranged on the inner side of the top wall of each baffle. The multiple baffles are spaced apart along the length direction of the semicircular steel groove. Two adjacent baffles are connected by the transmission rod, and the top end of the transmission rod is hinged to the outer end of the baffle located on the upper layer, and the bottom end of the transmission rod is hinged to the inner end of the baffle located on the lower layer. An installation groove is opened on the baffle located on the uppermost layer, and the bidirectional motor is located in the installation groove. The output shaft of the bidirectional motor is fixed to the groove wall of the installation groove, and the outer shell of the bidirectional motor is fixed to the inner wall of the semicircular steel groove.

[0008] Furthermore: a semicircular cover plate is arranged on the installation groove, and the semicircular cover plate is used to protect the bidirectional motor.

[0009] Furthermore: two vibrating rods are provided, both of which extend out of the bottom of the bracket, each of the vibrating rods is connected to a vibrating motor via a soft rubber tube, and the vibrating motor is fixed to the bracket via a shock-absorbing structure.

[0010] Furthermore: the length of the vibrating rod extending out of the bottom of the bracket is 0.7m-2m.

[0011] Furthermore: the bracket is composed of a back frame and a tripod, two tripods are provided, and the two tripods are symmetrically arranged at the bottom of the back frame, the top of the semicircular steel groove is fixed to the top of the back frame, and the bottom of the semicircular steel groove is fixed to the two tripods.

[0012] Furthermore: the back frame and the tripod are made of steel trusses.

[0013] A construction method for a super-high steel column concrete pouring device comprises the following steps:

[0014] S1. A plurality of feed ports are formed by segmented openings on the steel column, and the plurality of feed ports are numbered as the first feed port, the second feed port, ... the nth feed port in the direction from the bottom end of the steel column to the top end thereof;

[0015] S2. Weld a mounting frame on the top of the steel column and fix the winch on the mounting frame;

[0016] S3. Before installing the steel column, install the bracket together with the vibrating mechanism, the semicircular steel trough and the buffer mechanism installed on the semicircular steel trough in the steel column, and connect the bracket to the winch through the lifting rope, and set a temporary support at the bottom of the steel column to prevent the bracket from sliding when the steel column is placed vertically;

[0017] S4. Install and fix steel columns;

[0018] S5. Connect the pouring hopper to the first feed port, pour concrete into the steel column through the pouring hopper from the first feed port, and the concrete slides down from top to bottom to the bottom of the steel column through the buffer mechanism. At the same time, the winch gradually lifts the bracket through the rope control and starts the vibrating mechanism;

[0019] S6. When the pouring surface is slightly lower than the first feed inlet, the pouring is suspended, and the pouring hopper is transferred to the second feed inlet. At the same time, the first feed inlet is closed with an annular closed steel member;

[0020] S7. Repeat steps S5 and S6. After pouring the nth feed port, inject concrete from the top of the steel column until it is full and seal it with a column cap. When pouring the top of the steel column, use a crane to lift and hoist out the bracket, buffer mechanism, and vibrating mechanism.

[0021] Further: the plurality of baffles of the buffer mechanism are numbered in order from top to bottom as the first baffle, the second baffle, the third baffle, the fourth baffle, ... the nth baffle, initially, the baffles with odd numbers are in a closed state, and the baffles with even numbers are in an open state, and when the concrete slides down from top to bottom to the bottom of the steel column through the action of the buffer mechanism, the following steps are included:

[0022] S51. Concrete falls from the feed port onto the first baffle, and the accumulated weight of concrete on the first baffle is monitored by the pressure sensor on the first baffle;

[0023] S52. When the weight of the concrete on the first baffle reaches the preset upper limit, the bidirectional motor rotates forward, controls the first baffle to rotate to the open state, and the second baffle to rotate to the closed state, and the concrete slides down from the first baffle to the second baffle;

[0024] S53. The pressure sensor on the second baffle monitors the weight of the concrete on the second baffle. When the weight of the concrete on the second baffle reaches the preset upper limit, the bidirectional motor reverses to control the first baffle to rotate to the closed state. At this time, the second baffle is opened and the third baffle is closed, and the concrete on the second baffle slides down to the third baffle;

[0025] S54. The pressure sensor on the third baffle monitors the accumulated weight of concrete on the third baffle. When the accumulated weight of concrete on the third baffle reaches the preset upper limit, the bidirectional motor rotates forward, the third baffle opens, the fourth baffle closes, and the concrete on the third baffle slides down to the fourth baffle, and the cycle continues until the concrete slides to the bottom of the steel column.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] A plurality of feed ports are provided in sections on the steel column, the bracket is placed in the steel column, the buffer mechanism is arranged on the bracket through a semicircular steel groove, the vibrating mechanism is fixed on the bracket, and the bracket is lifted by a winch. When pouring concrete into the steel column, concrete is poured through the feed port, and the steel column can be poured in sections. Compared with the traditional pouring method from the top of the steel column, the segmented pouring of the present invention can avoid the quality problems such as high-throw segregation of concrete and pressure seepage, and the speed of concrete sliding can be effectively controlled by the buffer mechanism, further avoiding segregation caused by high-throw concrete, and cooperating with the vibrating mechanism to ensure the density of concrete and the construction quality. At the same time, mechanized construction can effectively reduce the input of personnel and the need to set up brackets, effectively saving construction period costs and reducing risks. The device has a simple structure, is easy to assemble, effectively reduces the difficulty of work, has a fast concrete pouring speed, and has controllable pouring quality. It can also be recycled to save resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 The structure of the buffer mechanism of the present invention is shown in FIG. Figure 1 ;

[0030] Figure 3 It is a structural schematic diagram of the vibrating mechanism of the present invention;

[0031] Figure 4 This is a schematic diagram of the structure of the semicircular steel trough and the bracket of the present invention;

[0032] Figure 5 The structure of the buffer mechanism of the present invention is shown in FIG. Figure 2 ;

[0033] Figure 6 It is a schematic diagram of the principle of the process of concrete sliding down through the buffer mechanism of the present invention.

[0034] Explanation of the reference numerals: 1-steel column, 2-winch, 3-bracket, 4-semicircular steel trough, 5-buffer mechanism, 6-vibration mechanism, 7-feeding port, 8-hanging rope, 9-vibration rod, 10-baffle, 11-transmission rod, 12-bidirectional motor, 13-pressure sensor, 14-installation groove, 15-semicircular cover plate, 16-soft rubber hose, 17-vibration motor, 18-shock-absorbing structure, 19-back frame, 20-foot frame, 21-pouring hopper, 22-concrete. DETAILED DESCRIPTION

[0035] Reference Figures 1 to 6 A device for pouring concrete 22 for a super-high steel column 1 includes a winch 2, a bracket 3, a semicircular steel trough 4, a buffer mechanism 5, and a vibrating mechanism 6. The winch 2 is arranged at the top of the steel column 1, and the side wall of the steel column 1 is provided with a plurality of feed ports 7 spaced apart along its length direction. The bracket 3 is located inside the steel column 1, and the winch 2 is connected to the bracket 3 through a suspension rope 8. The semicircular steel trough 4 is obliquely fixed on the bracket 3, and the notch of the semicircular steel trough 4 faces the feed port 7. The buffer mechanism 5 is arranged in the semicircular steel trough 4, and the vibrating mechanism 6 is arranged on the bracket 3, and the vibrating rod 9 of the vibrating mechanism 6 extends out of the bottom of the bracket 3.

[0036] The distance between two adjacent feed ports 7 is 10m-20m.

[0037] The buffer mechanism 5 includes a baffle 10, a transmission rod 11, a bidirectional motor 12, and a pressure sensor 13. There are multiple baffles 10, and a pressure sensor 13 is arranged on the inner side of the top wall of each baffle 10. The multiple baffles 10 are spaced apart along the length direction of the semicircular steel groove 4. Two adjacent baffles 10 are connected by a transmission rod 11, and the top end of the transmission rod 11 is hinged to the outer end of the baffle 10 located on the upper layer, and the bottom end of the transmission rod 11 is hinged to the inner end of the baffle 10 located on the lower layer. An installation groove 14 is opened on the baffle 10 located on the uppermost layer, and the bidirectional motor 12 is located in the installation groove 14. The output shaft of the bidirectional motor 12 is fixed to the groove wall of the installation groove 14, and the outer shell of the bidirectional motor 12 is fixed to the inner wall of the semicircular steel groove 4.

[0038] The plurality of baffles 10 are numbered in order from top to bottom as a first baffle, a second baffle, a third baffle, a fourth baffle, ... an nth baffle.

[0039] In the initial state, the first baffle plate, the third baffle plate, and other baffle plates 10 with odd numbers are in a vertical relationship with the inner wall of the semicircular steel groove 4. At this time, the baffle plates 10 with odd numbers are in a closed state, and the angles between the second baffle plate, the fourth baffle plate, and other baffle plates 10 with even numbers and the inner wall of the semicircular steel groove 4 are acute angles. At this time, the baffle plates 10 with even numbers are in an open state.

[0040] The first baffle is the uppermost baffle 10, and the bidirectional motor 12 controls the rotation of the first baffle. When the bidirectional motor 12 rotates forward to control the first baffle to rotate to the open state, the first baffle drives the second baffle to close through the transmission rod 11, the second baffle drives the third baffle to open through the transmission rod 11, the third baffle drives the fourth baffle to close through the transmission rod 11, and so on. Conversely, when the bidirectional motor 12 rotates backward to control the first baffle to rotate to the closed state, the first baffle drives the second baffle to open through the transmission rod 11, the second baffle drives the third baffle to close through the transmission rod 11, the third baffle drives the fourth baffle to open through the transmission rod 11, and so on.

[0041] When pouring concrete 22, concrete 22 falls on the first baffle from the feed port 7. At this time, the baffle 10 with an odd number is in a closed state, and concrete 22 accumulates on the first baffle. The accumulated weight of concrete 22 is monitored by the pressure sensor 13 arranged on the first baffle. When the accumulated weight reaches a preset upper limit, the bidirectional motor 12 rotates forward to control the first baffle to rotate to an open state. At this time, the second baffle rotates to a closed state, so that the concrete 22 on the first baffle slides down to the second baffle. When the accumulated weight of concrete 22 on the second baffle reaches a preset upper limit, the bidirectional motor 12 reverses to control the first baffle to rotate to a closed state. At this time, the second baffle is opened and the third baffle is closed at the same time, and the concrete 22 on the second baffle slides down to the third baffle. When the accumulated weight of concrete 22 on the third baffle reaches a preset upper limit, the bidirectional motor 12 rotates forward to open the third baffle and close the fourth baffle at the same time, so that the concrete 22 on the third baffle slides down to the fourth baffle, and the cycle continues until the concrete 22 slides down to the steel column 1 (such as Figure 6 shown).

[0042] A semicircular cover plate 15 is provided on the installation groove 14 , and the semicircular cover plate 15 is used to protect the bidirectional motor 12 .

[0043] The semicircular cover plate 15 can prevent the bidirectional motor 12 from being contaminated by the concrete 22 .

[0044] Two vibrating rods 9 are provided, and both vibrating rods 9 extend out of the bottom of the bracket 3 . Each vibrating rod 9 is connected to a vibrating motor 17 via a soft rubber tube 16 , and the vibrating motor 17 is fixed to the bracket 3 via a shock absorbing structure 18 .

[0045] The shock absorbing structure 18 is a spring or shock-proof rubber.

[0046] When the concrete 22 slides down from the baffle 10 of the buffer mechanism 5 into the steel column 1 , the vibrating motor 17 drives the vibrating rod 9 to vibrate, and the concrete 22 is vibrated and compacted by the vibrating rod 9 .

[0047] The length of the vibrating rod 9 extending out of the bottom of the bracket 3 is 0.7m-2m.

[0048] The vibrating rod 9 is extended out of the bottom of the support 3 by 0.7m-2m to ensure the vibrating effect of the vibrating rod 9.

[0049] The bracket 3 is composed of a back frame 19 and a tripod 20. Two tripods 20 are provided. The two tripods 20 are symmetrically arranged at the bottom of the back frame 19. The top of the semicircular steel groove 4 is fixed to the top of the back frame 19, and the bottom of the semicircular steel groove 4 is fixed to the two tripods 20.

[0050] The back frame 19 and the foot frame 20 are made of steel trusses.

[0051] A construction method for a super-high steel column concrete pouring device comprises the following steps:

[0052] S1. A plurality of feed ports are formed by drilling holes in sections on the steel column. The plurality of feed ports are numbered as the first feed port, the second feed port, ... the nth feed port in sequence from the bottom end of the steel column to the top end thereof.

[0053] S2. Weld the mounting frame on the top of the steel column and fix the winch on the mounting frame.

[0054] S3. Before installing the steel column, install the bracket together with the vibrating mechanism, semicircular steel trough and buffer mechanism installed on the semicircular steel trough in the steel column, and connect the bracket with the lifting rope and winch. At the same time, set a temporary support at the bottom of the steel column to prevent the bracket from sliding when the steel column is placed vertically.

[0055] S4. Install and fix steel columns.

[0056] S5. Connect the pouring hopper to the first feed port, and pour concrete into the steel column through the pouring hopper from the first feed port. The concrete slides down from top to bottom to the bottom of the steel column through the buffer mechanism. At the same time, the winch controls the bracket to gradually rise through the suspension rope, and starts the vibrating mechanism.

[0057] S6. When the pouring surface is slightly lower than the first feed inlet, the pouring is stopped and the pouring hopper is transferred to the second feed inlet. At the same time, the first feed inlet is closed with an annular closed steel member.

[0058] S7. Repeat steps S5 and S6. After pouring the nth feed port, inject concrete from the top of the steel column until it is full and seal it with a column cap. When pouring the top of the steel column, use a crane to lift and hoist out the bracket, buffer mechanism, and vibrating mechanism.

[0059] Specifically, the plurality of baffles of the buffer mechanism are numbered as the first baffle, the second baffle, the third baffle, the fourth baffle, ... the nth baffle in order from top to bottom. Initially, the baffles with odd numbers are in a closed state, and the baffles with even numbers are in an open state. When the concrete slides down from top to bottom to the bottom of the steel column through the action of the buffer mechanism, the following steps are included:

[0060] S51. Concrete falls from the feed port onto the first baffle, and the accumulated weight of concrete on the first baffle is monitored by the pressure sensor on the first baffle;

[0061] S52. When the weight of the concrete on the first baffle reaches the preset upper limit, the bidirectional motor rotates forward, controls the first baffle to rotate to the open state, and the second baffle to rotate to the closed state, and the concrete slides down from the first baffle to the second baffle;

[0062] S53. The pressure sensor on the second baffle monitors the weight of the concrete on the second baffle. When the weight of the concrete on the second baffle reaches the preset upper limit, the bidirectional motor reverses to control the first baffle to rotate to the closed state. At this time, the second baffle is opened and the third baffle is closed, and the concrete on the second baffle slides down to the third baffle;

[0063] S54. The pressure sensor on the third baffle monitors the accumulated weight of concrete on the third baffle. When the accumulated weight of concrete on the third baffle reaches the preset upper limit, the bidirectional motor rotates forward, the third baffle opens, the fourth baffle closes, and the concrete on the third baffle slides down to the fourth baffle, and the cycle continues until the concrete slides to the bottom of the steel column.

[0064] The above detailed description is a specific description of a feasible embodiment of the present invention. The embodiment is not intended to limit the patent scope of the present invention. Any equivalent implementation or modification that does not deviate from the present invention should be included in the patent scope of this case.

Claims

1. A device for pouring concrete for super-high steel columns, characterized in that: It includes a winch, a bracket, a semicircular steel trough, a buffer mechanism, and a vibrating mechanism. The winch is arranged on the top of the steel column. The side wall of the steel column is provided with multiple feed ports spaced apart along the length direction thereof. The bracket is located inside the steel column. The winch is connected to the bracket through a suspension rope. The semicircular steel trough is obliquely fixed on the bracket. The notch of the semicircular steel trough faces the feed port. The buffer mechanism is arranged in the semicircular steel trough. The vibrating mechanism is arranged on the bracket, and the vibrating rod of the vibrating mechanism extends out of the bottom of the bracket.

2. A device for pouring concrete for super-high steel columns according to claim 1, characterized in that: The distance between two adjacent feed ports is 10m-20m.

3. The device for pouring concrete for super-high steel columns according to claim 1, characterized in that: The buffer mechanism includes a baffle, a transmission rod, a bidirectional motor, and a pressure sensor. There are multiple baffles, and the pressure sensor is arranged on the inner side of the top wall of each baffle. The multiple baffles are spaced apart along the length direction of the semicircular steel groove, and two adjacent baffles are connected by the transmission rod. The top end of the transmission rod is hinged to the outer end of the baffle located on the upper layer, and the bottom end of the transmission rod is hinged to the inner end of the baffle located on the lower layer. An installation groove is opened on the baffle located on the uppermost layer, and the bidirectional motor is located in the installation groove. The output shaft of the bidirectional motor is fixed to the groove wall of the installation groove, and the outer shell of the bidirectional motor is fixed to the inner wall of the semicircular steel groove.

4. The device for pouring concrete for super-high steel columns according to claim 3, characterized in that: A semicircular cover plate is arranged on the installation groove, and the semicircular cover plate is used to protect the bidirectional motor.

5. The device for pouring concrete for super-high steel columns according to claim 3, characterized in that: Two vibrating rods are provided, and both of the two vibrating rods extend out of the bottom of the bracket. Each of the vibrating rods is connected to a vibrating motor via a soft rubber tube, and the vibrating motor is fixed to the bracket via a shock-absorbing structure.

6. The device for pouring concrete for super-high steel columns according to claim 5, characterized in that: The length of the vibrating rod extending out of the bottom of the bracket is 0.7m-2m.

7. The device for pouring concrete for super-high steel columns according to claim 6, characterized in that: The bracket is composed of a back frame and a tripod. Two tripods are provided. The two tripods are symmetrically arranged at the bottom of the back frame. The top of the semicircular steel groove is fixed to the top of the back frame, and the bottom of the semicircular steel groove is fixed to the two tripods.

8. The device for pouring concrete for super-high steel columns according to claim 7, characterized in that: The back frame and the foot frame are made of steel trusses.

9. A construction method for a super-high steel column concrete pouring device, characterized in that: The following steps are included: S1. A plurality of feed ports are formed by segmented openings on the steel column, and the plurality of feed ports are numbered as the first feed port, the second feed port, ... the nth feed port in the direction from the bottom end of the steel column to the top end thereof; S2. Weld a mounting frame on the top of the steel column and fix the winch on the mounting frame; S3. Before installing the steel column, install the bracket together with the vibrating mechanism, the semicircular steel trough and the buffer mechanism installed on the semicircular steel trough in the steel column, and connect the bracket to the winch through the lifting rope, and set a temporary support at the bottom of the steel column to prevent the bracket from sliding when the steel column is placed vertically; S4. Install and fix steel columns; S5. Connect the pouring hopper to the first feed port, pour concrete into the steel column through the pouring hopper from the first feed port, and the concrete slides down from top to bottom to the bottom of the steel column through the buffer mechanism. At the same time, the winch gradually lifts the bracket through the rope control and starts the vibrating mechanism; S6. When the pouring surface is slightly lower than the first feed inlet, the pouring is suspended, and the pouring hopper is transferred to the second feed inlet. At the same time, the first feed inlet is closed with an annular closed steel member; S7. Repeat steps S5 and S6. After pouring the nth feed port, inject concrete from the top of the steel column until it is full and seal it with a column cap. When pouring the top of the steel column, use a crane to lift and hoist out the bracket, buffer mechanism, and vibrating mechanism.

10. The construction method of the ultra-high steel column concrete pouring device according to claim 9, characterized in that: The plurality of baffles of the buffer mechanism are numbered as the first baffle, the second baffle, the third baffle, the fourth baffle, ... the nth baffle in order from top to bottom. Initially, the baffles with odd numbers are in a closed state, and the baffles with even numbers are in an open state. When the concrete slides down from top to bottom to the bottom of the steel column through the action of the buffer mechanism, the following steps are included: S51. Concrete falls from the feed port onto the first baffle, and the accumulated weight of concrete on the first baffle is monitored by the pressure sensor on the first baffle; S52. When the weight of the concrete on the first baffle reaches the preset upper limit, the bidirectional motor rotates forward, controls the first baffle to rotate to the open state, and the second baffle to rotate to the closed state, and the concrete slides down from the first baffle to the second baffle; S53. The pressure sensor on the second baffle monitors the weight of the concrete on the second baffle. When the weight of the concrete on the second baffle reaches the preset upper limit, the bidirectional motor reverses to control the first baffle to rotate to the closed state. At this time, the second baffle is opened and the third baffle is closed, and the concrete on the second baffle slides down to the third baffle; S54. The pressure sensor on the third baffle monitors the accumulated weight of concrete on the third baffle. When the accumulated weight of concrete on the third baffle reaches the preset upper limit, the bidirectional motor rotates forward, the third baffle opens, the fourth baffle closes, and the concrete on the third baffle slides down to the fourth baffle, and the cycle continues until the concrete slides to the bottom of the steel column.

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