Descent control device for high-fall concrete conveying
By designing the lowering device for reinforcement plates, sealing sections and buffer sections, the problems of easy wear, breakdown and easy blockage of pipes in the existing lowering device are solved, and the stable transport of concrete is achieved, and construction efficiency and project quality are improved.
Patent Information
- Application Number
- CN202422173078.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-05
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-05
AI Technical Summary
The existing droppers are prone to wear, breakdown and easy to block pipes during the high drop conveying process of concrete, resulting in low construction efficiency and poor project quality.
A downswinger including feed pipe, discharge pipe and through-feeding channel is designed. Through the setting of reinforcement plate, closed section and buffer section, the discharge pipe is prevented from being broken down, the concrete flow rate is reduced, the pipe blockage is reduced, and the inspection is facilitated through the remote monitoring and maintenance window of the speedometer.
Effectively prevent the discharge pipe from being broken down, reduce the pipe blockage, improve the stability and construction efficiency of concrete, extend the service life of the equipment, and improve construction quality and safety.
Smart Images
Figure CN222991523U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of underground engineering construction, and particularly relates to a slow - down device for high - drop concrete transportation. Background Art
[0002] In modern underground engineering, especially during the construction of the shaft walls of deep large - diameter vertical shafts and inclined shafts with a height difference greater than 20m, the high - drop transportation of concrete has always been a technical problem to be solved urgently. Traditional concrete transportation methods such as bucket transportation and conveyor belt transportation have too slow transportation speeds and are difficult to meet the requirements of a tight construction period. In contrast, the use of a chute pipe to transport concrete has advantages such as high speed and continuous pouring. While ensuring the support quality, it improves the construction speed and shortens the construction period. It is one of the methods for quickly transporting concrete in high - vertical - distance building construction at present. However, during the high - drop transportation process, problems such as segregation, bleeding, and excessive impact force of concrete are likely to occur, which are quality and safety issues. With the wide application of slip - form construction technology, the requirements for the quality of concrete pouring are becoming more and more strict. How to effectively control the stability and uniformity of concrete during transportation has become the key to improving construction efficiency and ensuring project quality.
[0003] When existing slow - down devices deal with these technical problems, they face some significant deficiencies. Due to the high abrasiveness of concrete, these slow - down devices are easily worn out or even penetrated, resulting in a shortened service life of the equipment and thus affecting the continuity of construction. In addition, during the use of the slow - down device, the phenomenon of pipe blockage is likely to occur. Once blockage occurs, locating and solving the problem often requires a large amount of time and manpower, seriously affecting the construction progress.
[0004] In summary, there is an urgent need for a slow - down device with high wear resistance, anti - penetration, and anti - pipe - blockage to solve the problems existing in the prior art. Content of the Utility Model
[0005] The purpose of the utility model is to provide a slow - down device for high - drop concrete transportation to solve the technical problems of easy wear and easy pipe blockage of the slow - down device in the prior art. The specific technical solution is as follows:
[0006] The utility model provides a slow - down device for high - drop concrete transportation, which includes a feed pipe, a discharge pipe, and a material - passing channel. The material - passing channel is connected between the feed pipe and the discharge pipe. The first end of the feed pipe is connected to a chute pipe. The second end of the feed pipe extends through the material - passing channel to form a closed section, and the closed section is filled with buffer material. The first end of the discharge pipe extends through the material - passing channel to form a buffer section. The second end of the discharge pipe is connected to a chute pipe. The end of the buffer section is sealed and provided with an exhaust hole. A reinforcement plate is provided on the discharge pipe at a position opposite to the material - passing channel.
[0007] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that the material passing channel is vertically connected between the feed pipe and the discharge pipe.
[0008] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that a maintenance window is provided at the position of the feed pipe opposite to the material passing channel, and the feed pipe is connected with a cover plate covering the maintenance window.
[0009] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that the discharge pipe is a square pipe, the area of the reinforcement plate is larger than the cross-sectional area of the discharge pipe, and the area of the maintenance window is equal to the cross-sectional area of the discharge pipe.
[0010] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that a speedometer is inserted at one end of the discharge pipe far from the buffer section.
[0011] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that a first flange is provided at the first end of the feed pipe, and the feed pipe is connected to the chute pipe through the first flange.
[0012] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that a second flange is provided at the second end of the discharge pipe, and the discharge pipe is connected to the chute pipe through the second flange.
[0013] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that the buffer material is sand and gravel filler, and the height of the sand and gravel filler is between one-third and one-half of the length of the buffer section.
[0014] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that the material of the reinforcement plate is steel.
[0015] A further improvement of the shock absorber for high-drop concrete conveying of the present utility model lies in that the diameter of the exhaust hole is between 18 and 22 mm.
[0016] Applying the technical solution of the present utility model has the following beneficial effects:
[0017] The utility model relates to a descender for high-drop concrete conveying. The arrangement of the reinforcing plate can prevent the discharge pipe from being penetrated. Through the arrangement of the closed section and the buffer section, the flow rate of the concrete at the discharge end can be reduced, the situation of pipe blockage can be reduced, the segregation of the concrete can be inhibited, the stability of the concrete can be improved, and the construction efficiency and construction quality can be ensured, solving the technical problems of easy wear and easy pipe blockage of the descender in the prior art. The passing condition of the concrete in the pipeline can be remotely monitored by a speedometer, and when the pipe blockage phenomenon occurs, it can respond in time, reducing the time cost required for maintenance. The maintenance window is easy to maintain, has strong durability, improves the impact resistance, improves the reliability and safety, and extends its service life.
[0018] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings to further elaborate on the utility model in detail. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The drawings forming a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model. In the drawings:
[0020] Figure 1 is a longitudinal sectional view of a descender for high-drop concrete conveying according to the utility model;
[0021] Figure 2 is a three-dimensional perspective view of a descender for high-drop concrete conveying according to the utility model.
[0022] Among them, 1, the first flange; 2, the feed pipe; 3, the closed section; 4, the material passing channel; 5, the buffer section; 6, the discharge pipe; 7, the exhaust hole; 8, the maintenance window; 9, the buffer material; 10, the reinforcing plate; 11, the speedometer; 12, the bolt; 13, the chute pipeline. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] The following will elaborate on the embodiments of the utility model in detail with reference to the drawings.
[0024] See Figures 1 to 2 As shown, a descender for high-drop concrete conveying includes a feed pipe 2, a discharge pipe 6 and a material passing channel 4. The material passing channel 4 is communicated between the feed pipe 2 and the discharge pipe 6. The first end of the feed pipe 2 is connected to the chute pipeline 13, and the second end of the feed pipe 2 extends out of the material passing channel 4 to form a closed section 3. The closed section 3 is filled with buffer material 9. The first end of the discharge pipe 6 extends out of the material passing channel 4 to form a buffer section 5. The second end of the discharge pipe 6 is connected to the chute pipeline 13. The end of the buffer section 5 is sealed and provided with an exhaust hole 7. A reinforcing plate 10 is provided on the discharge pipe 6 at a position corresponding to the material passing channel 4.
[0025] In this embodiment, both the feed pipe 2 and the discharge pipe 6 are circular pipes. The width of the material passing channel 4 is equal to the diameters of the feed pipe 2 and the discharge pipe 6. The material passing channel 4 is 200 mm long and 200 mm high. During installation, multiple shock absorbers are arranged at equal intervals on the chute pipe 13, and the distance between two adjacent shock absorbers is 5 m to 7 m, preferably 6 m. If the distance between the bottom outlet end of the chute pipe 13 and the nearest shock absorber is greater than two meters, a shock absorber needs to be installed at the outlet end of the chute pipe 13; otherwise, the lowermost chute pipe 13 should be inclined to place the shock absorber, and the inclination angle is not less than 45°. By arranging this device at intervals in the chute pipe 13, while solving the problem of concrete segregation during vertical transportation, the kinetic energy accumulated during the falling process of the concrete is gradually eliminated, avoiding the safety hazard of the pipe wall being penetrated caused by the continuous impact of the concrete on the shock absorber. In addition, the problem of pipe blockage in the concrete chute system can be processed in time by monitoring the data of the speedometer 11.
[0026] Preferably, the material passing channel 4 is vertically connected between the feed pipe 2 and the discharge pipe 6, so as to realize the turning during concrete transportation, and then reduce the transportation speed.
[0027] Preferably, a maintenance window 8 is provided at the position of the feed pipe 2 opposite to the material passing channel 4, and the feed pipe 2 is connected with a cover plate covering the maintenance window 8. The cover plate is connected to the feed pipe 2 through a bolt. When maintenance is required, the cover plate is opened through the bolt 12, and maintenance operations are carried out through the maintenance window 8. After the maintenance is completed, the cover plate is covered on the maintenance window 8 through the bolt 12 again.
[0028] Preferably, the discharge pipe 6 is a square pipe. The area of the reinforcement plate 10 is larger than the cross-sectional area of the discharge pipe 6, and the area of the maintenance window 8 is equal to the cross-sectional area of the discharge pipe 6. The reinforcement plate 10 is 400 mm long, 200 mm high, and 5 mm thick, and the bottom of the reinforcement plate 10 is 50 mm lower than the bottom plate height of the material passing channel 4.
[0029] Preferably, a speedometer 11 is inserted at one end of the discharge pipe 6 away from the buffer section 5. The speedometer 11 uses an inserted ultrasonic speedometer to measure the flow rate of the concrete at the position of the discharge pipe 6. The speedometer 11 is wirelessly connected to the terminal controller, so as to remotely understand the flow rate of the concrete at the corresponding position. In this embodiment, the speedometer 11 is installed 150 mm away from the bottom of the discharge pipe 6.
[0030] Preferably, a first flange 1 is provided at the first end of the feed pipe 2, and the feed pipe 2 is connected to the chute pipe 13 through the first flange 1.
[0031] Preferably, the second end of the discharge pipe 6 is provided with a second flange, and the discharge pipe 6 is connected to the chute pipe 13 through the second flange. The feeding circular pipe and the discharge circular pipe have the same height, the same diameter, and the same thickness. In this embodiment, the length of the closed section 3 is 300 mm. A square through-hole is opened on the side wall of the feeding pipe 2 and connected to the material passing channel 4. The distance between the square through-hole and the top of the material passing channel 4 from the top of the feeding pipe 2 is 250 mm.
[0032] Preferably, the buffer material 9 is sand and gravel filler, and the height of the sand and gravel filler is between one-third and one-half of the length of the buffer section 5. In this embodiment, the height of the sand and gravel filler is about 100 mm, so as to buffer the passing concrete.
[0033] Preferably, the material of the reinforcement plate 10 is steel. In this embodiment, the reinforcement plate 10 adopts Q345B high-strength low-alloy structural steel. The steel plate is 400 mm long, 200 mm high, and 5 mm thick. The bottom height of the reinforcement plate 10 is 50 mm lower than the bottom height of the material passing channel 4, so that the reinforcement plate 10 at this position can completely cover the worn part of the discharge circular pipe.
[0034] Furthermore, the diameter of the exhaust hole 7 is between 18 and 22 mm, preferably 20 mm, and the exhaust hole 7 is opened on the side close to the material passing channel 4, so as to prevent the concrete from overflowing from the ventilation hole.
[0035] In the lining construction of the shaft with a digging depth of 114.1 m of the present utility model, in order to reduce the generation of construction joints, the slip form process is adopted for concrete pouring. The feeding method is selected to be transported by the chute pipe 13, and a multi-section descender is configured to inhibit the segregation of concrete during the high-drop transportation process and reduce the impact damage to the transportation pipeline.
[0036] The feeding pipe 2 and the discharge pipe 6 of the descender adopt steel pipes with an inner diameter of φ219 mm and a wall thickness of 5 mm. The position of the exhaust hole 7 is fixed with an exhaust steel pipe with an inner diameter of 20 mm, which is made and processed with a 20 mm thick steel plate. Square notches with side lengths of 200 mm×200 mm are respectively cut at one ends of two steel pipes with a length of 750 mm and a diameter of φ219 mm, and they are placed side by side with a distance of 200 mm between them. The notches are aligned and welded into a square material passing channel 4 with a 5 mm thick Q345B low-alloy high-strength steel plate. The top of the discharge pipe 6 is sealed and opened with a hole and welded with a steel pipe with a diameter of 20 mm as the exhaust hole 7. A small hole is opened 150 mm above the opening of the discharge pipe 6 to install an insertion type ultrasonic speedometer. In this embodiment, the installation position of the speedometer should be on the pipe wall on the side facing the material passing channel. A square hole with side lengths of 200 mm×200 mm is opened on the side of the feeding circular pipe to install a bolt type inspection door, and the inspection door faces the material passing channel, which is convenient for timely inspection and cleaning of the inner cavity in case of blockage.
[0037] The descender is flange-connected to the chute pipe 13 and locked to the shaft wall using fixing devices such as collars and bolts. During installation, adjacent descenders are alternately connected by rotating 180° in the vertical direction to reduce the occupation of vertical space. According to the numerical simulation results and actual engineering experience, multiple descenders should be arranged at equal intervals of 6 m. After the concrete passes through more than three descenders, the flow velocity at the outlet end of the descender is about 3.41 m / s, which prevents the segregation of the concrete while dissipating energy and reducing pressure, ensuring the quality of the concrete entering the bin.
[0038] In the present utility model, the arrangement of the reinforcement plate 10 can prevent the discharge pipe 6 from being penetrated. Through the arrangement of the closed section 3 and the buffer section 5, the flow velocity of the concrete at the discharge end can be reduced, the situation of pipe blockage can be reduced, and the segregation of the concrete can be inhibited, improving the stability of the concrete. At the same time, the construction efficiency and construction quality are ensured, and the technical problems of easy wear and easy pipe blockage of the descender in the prior art are solved. The passing situation of the concrete in the pipe can be remotely monitored by the speedometer 11, and when the pipe blockage phenomenon occurs, it can respond in time, reducing the time cost required for maintenance. The inspection window 8 is easy to maintain, has strong durability, improves the impact resistance, improves the reliability and safety, and extends its service life.
[0039] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A descender for high-drop concrete transportation, characterized in that: The invention comprises a feed pipe (2), a discharge pipe (6) and a feed passage (4), wherein the feed passage (4) is connected between the feed pipe (2) and the discharge pipe (6), the first end of the feed pipe (2) is connected to a conveying pipe (13), the second end of the feed pipe (2) extends out of the feed passage (4) to form a closed section (3), the closed section (3) is filled with a buffer material (9), the first end of the discharge pipe (6) extends out of the feed passage (4) to form a buffer section (5), the second end of the discharge pipe (6) is connected to the conveying pipe (13), the end of the buffer section (5) is sealed and provided with an exhaust hole (7), and a reinforcing plate (10) is provided on the discharge pipe (6) at a position corresponding to the feed passage (4).
2. The descender for high-drop concrete transportation according to claim 1, characterized in that: The material transfer channel (4) is vertically connected between the feed pipe (2) and the discharge pipe (6).
3. The descender for high-drop concrete transportation according to claim 1, characterized in that: An inspection window (8) is provided on the feed pipe (2) at a position directly opposite to the feed passage (4), and the feed pipe (2) is connected to a cover plate covering the inspection window (8).
4. The descender for high-drop concrete transportation according to claim 3, characterized in that: The discharge pipe (6) is a square pipe, the area of the reinforcing plate (10) is larger than the cross-sectional area of the discharge pipe (6), and the area of the inspection window (8) is equal to the cross-sectional area of the discharge pipe (6).
5. The descender for high-drop concrete transportation according to claim 1, characterized in that: A tachometer (11) is inserted into one end of the discharge pipe (6) away from the buffer section (5).
6. The descender for high-drop concrete transportation according to claim 1, characterized in that: A first flange (1) is provided at the first end of the feed pipe (2), and the feed pipe (2) is connected to the conveying pipe (13) via the first flange (1).
7. The descender for high-drop concrete transportation according to claim 1, characterized in that: The second end of the discharge pipe (6) is provided with a second flange, and the discharge pipe (6) is connected to the conveying pipeline (13) via the second flange.
8. The descender for high-drop concrete transportation according to claim 1, characterized in that: The buffer material (9) is a sand and gravel filler, and the height of the sand and gravel filler is between one third and one half of the length of the buffer section (5).
9. The descender for high-drop concrete transportation according to claim 1, characterized in that: The material of the reinforcing plate (10) is steel.
10. The descender for high-drop concrete transportation according to claim 1, characterized in that: The diameter of the exhaust hole (7) is between 18 and 22 mm.