Dam slope belt conveyor negative pressure chute concrete conveying device
By designing the negative pressure chute concrete conveying device of the dam slope belt machine, the bottleneck problem of concrete transportation and warehouse entry in dam construction is solved, the concrete pouring strength is improved, the construction difficulty and safety risks are reduced, and the construction cycle is shortened.
Patent Information
- Application Number
- CN202420942185.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-04-30
AI Technical Summary
During the dam construction process, when the dam height is more than half, the unloading method of the car entrance of the original temporary dam road is no longer economical, safe and practical, resulting in the inability to guarantee the construction quality of the rolling concrete, the casting strength is low, the construction cycle is long, and the construction difficulty and safety risk coefficient are high.
A negative pressure chute concrete conveying device for dam slope belt machine is designed, which is set on the crane bedrock surface through steel trusses. The belt machine conveying unit is connected to the negative pressure chute. The negative pressure chute and rubber groove are used to reduce the falling speed and amount of concrete, and a vibrator is installed on the outside of the hopper to ensure smooth transportation of concrete.
It effectively improves the pouring strength of rolled concrete, reduces construction difficulty and safety risk coefficient, shortens the construction cycle, and improves the recycling rate of materials.
Smart Images
Figure CN222573473U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of dam filling, and in particular relates to a negative pressure chute concrete conveying device of a dam slope belt conveyor. Background Art
[0002] The Hanyin Donghe Reservoir Dam is a RCC parabolic hyperbolic arch dam with a height of 65.5m and a maximum arc length of 264m. Due to the limitations of the construction site, the steep slopes on both sides of the dam and the lack of horse paths, when the dam height exceeded half, the original temporary road to the dam for car unloading was no longer economical, safe and practical. The amount of slag backfill on the dam road doubled, the slope was steep and long, the high slope was more suspended, and the risk of car transportation doubled. This led to problems such as the inability to guarantee the quality of RCC construction, low pouring strength, long construction period, high construction difficulty and safety risk factor. Summary of the invention
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a dam slope belt conveyor negative pressure chute concrete conveying device which improves the pouring strength of rolled concrete, reduces construction difficulty and safety risk factor, and shortens the construction period.
[0004] The technical solution adopted to solve the above technical problems is: a dam slope belt conveyor negative pressure chute concrete conveying device, at least one group of belt conveyor conveying units is arranged on the shoulder bedrock surface through a steel truss, a receiving hopper is arranged on the upper left of the belt conveyor conveying unit, and the dump truck pours concrete into the receiving hopper. The right end of the belt conveyor conveying unit is connected to the negative pressure chute through a first hopper trough, the negative pressure chute is fixed by a steel truss installed on the slope, and a guide chute is arranged at the free end of the negative pressure chute.
[0005] The utility model provides two groups of belt conveying units, the two groups of belt conveying units are connected by a second bucket groove, and an obtuse angle is formed between the two groups of belt conveying units, and the second bucket groove is an arc structure.
[0006] The utility model provides a vibrator on the outer side wall of the receiving hopper, a material blocking plate is provided at the lower part of the receiving hopper, and a guide hopper groove is provided between the lower end of the receiving hopper and the belt conveying unit.
[0007] The utility model comprises a belt conveying unit comprising: a plurality of brackets are arranged at intervals in the length direction of a steel truss, three groups of rollers are arranged on each group of brackets through a mounting shaft, the rollers can rotate relative to the mounting shaft, one group of rollers is horizontally arranged on the bracket, and the other two groups of rollers are symmetrically arranged about the length direction of the horizontally arranged rollers, and the two groups of rollers form an acute angle with the horizontal plane, the belt is arranged around the rollers and moves forward with the rotation of the rollers, and a roller is arranged under the belt.
[0008] The utility model provides two groups of belt guide mechanisms on the steel truss in the width direction, and the belt guide mechanisms are arranged between adjacent groups of brackets.
[0009] The belt guide mechanism of the utility model is composed of a guide wheel and a support rod. One end of the support rod is fixed on the steel truss, and the other end is provided with a guide wheel, and the guide wheel can rotate relative to the support rod.
[0010] The negative pressure chute of the utility model comprises: a plurality of sections of semicircular chute bodies connected end to end, connecting plates are arranged at both ends of the chute bodies, through holes are processed on the connecting plates, two adjacent sections of the chute bodies are fixedly connected by threaded fastening connectors installed in the through holes, and a rubber groove is arranged on the inner wall of the chute body.
[0011] The rubber trough of the utility model is provided with horizontal edges at both ends along the length direction, and angle irons are provided at both ends of the chute body along the length direction. The horizontal edges and the angle irons extend into the U-shaped bolt clamp, and a gasket is provided on the upper part of the horizontal edge in the U-shaped bolt clamp. The fastening bolt penetrates through one side wall of the U-shaped bolt clamp, and fixes the horizontal edge and the angle iron by pressing the gasket.
[0012] The inner wall of the chute body of the utility model is provided with steel bars at intervals along the length direction.
[0013] The distance between the lowest point of the chute body of the utility model and the lowest point of the rubber groove is 8 to 10 cm.
[0014] Since the utility model adopts one group of rollers in the belt conveying unit to be horizontally arranged on the bracket, and the other two groups of rollers are symmetrically arranged about the length direction of the horizontally arranged rollers, and the two groups of rollers are at an acute angle with the horizontal plane, this arrangement makes the belt bend at a certain angle to prevent concrete from overflowing sideways during transportation. In order to further limit the belt, two groups of belt guide mechanisms are arranged on the steel truss in the width direction, which improves the degree of mechanized operation and work efficiency, saves time, and arranges two groups of belt conveying units, and arranges an arc bucket groove between adjacent belt conveying units. While extending the concrete conveying path, the conveying direction is changed so that it is located on the left bank of the arch dam. Wear-resistant steel bars are installed in the negative pressure chute, which greatly reduces the wear of the chute caused by the concrete conveying process, reduces the maintenance of the chute, saves costs, and improves the recycling rate of materials. Rubber grooves are installed in the chute to change the contact area between the chute and the concrete, making it smaller, thereby reducing the amount and speed of concrete falling. A flat vibrator is installed on the outside of the receiving hopper to solve the problem of poor material discharge, ensure the continuous operation of rolled concrete, and ensure the construction quality of rolled concrete. This device effectively solves the bottleneck problems of concrete transportation and warehousing, not only improves the pouring strength of rolled concrete, but also reduces the construction difficulty and safety risk factor, and shortens the construction period. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of an embodiment of the utility model.
[0016] Figure 2 yes Figure 1 Schematic diagram of the structure of the middle belt conveyor unit 6.
[0017] Figure 3 yes Figure 1 Schematic diagram of the structure of the medium negative pressure chute 8.
[0018] Figure 4 It is a structural schematic diagram of another embodiment of the utility model.
[0019] Figure 5 yes Figure 4 Top view of the .
[0020] In the figure: 1. dump truck; 2. receiving hopper; 3. vibrator; 4. material baffle; 5. guide hopper; 6. belt conveyor unit; 7. first hopper; 8. negative pressure chute; 9. steel truss; 10. guide chute; 11. second hopper; 6-1. bracket; 6-2. guide wheel; 6-3. roller; 6-4. belt; 6-5. support rod; 6-6. roller; 8-1. U-bolt clamp; 8-2. fastening bolt; 8-3. gasket; 8-4. rubber groove; 8-5. chute body; 8-6. steel bar; 8-7. connecting plate; 8-8. through hole; 8-9. angle iron. DETAILED DESCRIPTION
[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to these embodiments.
[0022] Example 1
[0023] exist Figure 1 , 2 3, the utility model relates to a dam slope belt conveyor negative pressure chute concrete conveying device, at least one group of belt conveyor units 6 is arranged on the shoulder bedrock surface through a steel truss 9. In this embodiment, a group of belt conveyor units 6 is arranged, and a receiving hopper 2 is arranged on the upper left of the belt conveyor unit 6. The dump truck 1 pours concrete into the receiving hopper 2. In order to ensure smooth material feeding, a vibrator 3 is arranged on the outer wall of the receiving hopper 2. The vibrating force generated by the vibrator 3 is used to make the concrete in the receiving hopper 2 fall onto the belt conveyor unit 6 to prevent excessive accumulation of concrete in the receiving hopper 2 from being blocked. A baffle plate 4 is arranged at the lower part of the receiving hopper 2. The baffle plate 4 is arranged horizontally. By pulling and inserting the baffle plate 4, the size of the discharge port below the receiving hopper 2 is controlled to adjust the concrete flow rate. A guide bucket groove 5 is arranged between the lower end of the receiving hopper 2 and the belt conveyor unit 6 to prevent splashing of concrete during falling.
[0024] Furthermore, the belt conveyor unit 6 is composed of a bracket 6-1, a guide wheel 6-2, a roller 6-3, a belt 6-4, a support rod 6-5, and a roller 6-6. Several groups of brackets 6-1 are arranged at intervals in the length direction of the steel truss 9. Three groups of rollers 6-3 are arranged on each group of brackets 6-1 through a mounting shaft. The rollers 6-3 can rotate relative to the mounting shaft. One group of rollers 6-3 is horizontally arranged on the bracket 6-1, and the other two groups of rollers 6-3 are symmetrically arranged about the length direction of the horizontally arranged rollers 6-3, and the two groups of rollers are arranged symmetrically about the length direction of the horizontally arranged rollers 6-3. 6-3 is at an acute angle with the horizontal plane. This setting makes the belt 6-4 bend at a certain angle to prevent the concrete from spilling sideways during transportation. In order to further limit the belt 6-4, two groups of belt guide mechanisms are set on the steel truss 9 in the width direction. The belt guide mechanism is set between adjacent groups of brackets 6. The belt guide mechanism is composed of a guide wheel 6-2 and a support rod 6-5. One end of the support rod 6-5 is fixed to the steel truss 9, and the other end is provided with a guide wheel 6-2. The guide wheel 6-2 can rotate relative to the support rod 6-5. The belt 6-4 is set around the roller 6-3 and moves forward with the rotation of the roller 6-3. The roller 6-6 is set below the belt 6-4. The roller 6-6 is installed on the steel truss 9 to prevent the belt 6-4 from sagging.
[0025] The right end of the belt conveyor unit 6 is connected to the negative pressure chute 8 through the first bucket 7. The negative pressure chute 8 is fixed by the steel truss 9 installed on the slope. The free end of the negative pressure chute 8 is provided with a guide bucket 10 to flow concrete into the dam warehouse surface. Specifically, the negative pressure chute 8 is composed of a U-shaped bolt clamp 8-1, a fastening bolt 8-2, a gasket 8-3, a rubber groove 8-4, a chute body 8-5, a steel bar 8-6, a connecting plate 8-7, and an angle iron 8-9. Several sections of semicircular chute bodies 8-5 are connected end to end. Both ends of the chute body 8-5 are provided with connecting plates 8-7. The connecting plates 8-7 are processed with through holes 8-8. The adjacent two sections of the chute body 8-5 are fixedly connected by threaded fastening connectors installed in the through holes 8-8. In order to increase the wear resistance of the chute body 8-5, steel bars 8-6 are arranged at intervals along the length direction on the inner wall of the chute body 8-5, and rubber gaskets are arranged between adjacent chute bodies 8-5. The inner wall of the chute body 8-5 is provided with a rubber groove 8-4, which changes the contact area between the chute body 8-5 and the concrete, making it smaller, thereby reducing the amount and speed of concrete falling. In this embodiment, the distance between the lowest point of the chute body 8-5 and the lowest point of the rubber groove 8-4 is 8 to 10 cm. In order to ensure the stable connection between the rubber groove 8-4 and the chute body 8-5, horizontal edges are provided at both ends of the rubber groove 8-4 along the length direction, and angle irons 8-9 are provided at both ends of the chute body 8-5 along the length direction. One corner of the angle iron 8-9 is welded to the chute body 8-5, and the horizontal edge and the other corner of the angle iron 8-9 extend into the U-shaped bolt clamp 8-1. A gasket 8-3 is provided on the upper part of the horizontal edge in the U-shaped bolt clamp 8-1, and a fastening bolt 8-2 is provided through a side wall of the U-shaped bolt clamp 8-1, and the horizontal edge and the angle iron 8-9 are fixed by tightening the fastening bolt 8-2 and pressing the gasket 8-3.
[0026] In this device, in order to facilitate the installation, maintenance, and removal of the receiving hopper 2, belt conveyor unit 6, and negative pressure chute 8, I-beam maintenance passages are added on both sides of the above-mentioned components, and the passage ladder is fixedly installed on the steel truss 9. The steel truss 9 is fixed to the bedrock surface and slope surface of the dam shoulder through anchor rods and concrete foundations, and anti-overturning devices are provided on both sides.
[0027] Example 2
[0028] In the above embodiment 1, Figure 4 , 5As shown, the belt conveyor unit 6 of this embodiment is provided with two groups, and the two groups of belt conveyor units 6 are connected by the second bucket 11, and an obtuse angle is formed between the two groups of belt conveyor units 6. The second bucket 11 is an arc structure. This setting changes the conveying direction while extending the concrete conveying path, so that it is located on the left bank of the arch dam. The remaining components and the connection relationship of the components are exactly the same as those of Example 1. The structure of this embodiment is actually applied in the roller compacted concrete hyperbolic arch dam of Hanyin Donghe Reservoir in Shaanxi Province, which meets the quality and progress requirements of engineering construction, has low cost and good effect.
Claims
1. A dam slope belt conveyor negative pressure chute concrete conveying device, at least one group of belt conveyor units (6) is arranged on the shoulder bedrock surface through a steel truss (9), a receiving hopper (2) is arranged on the upper left of the belt conveyor unit (6), a dump truck (1) pours concrete into the receiving hopper (2), the right end of the belt conveyor unit (6) is connected to the negative pressure chute (8) through a first hopper trough (7), the negative pressure chute (8) is fixed by a steel truss (9) installed on the slope, and a guide chute (10) is arranged at the free end of the negative pressure chute (8), characterized in that: The belt conveyor unit (6) comprises: a plurality of groups of brackets (6-1) are arranged at intervals in the length direction of the steel truss (9); three groups of rollers (6-3) are arranged on each group of brackets (6-1) via a mounting shaft; the rollers (6-3) can rotate relative to the mounting shaft; one group of rollers (6-3) is horizontally arranged on the bracket (6-1); the other two groups of rollers (6-3) are symmetrically arranged with respect to the length direction of the horizontally arranged rollers (6-3); the two groups of rollers (6-3) form an acute angle with the horizontal plane; the belt (6-4) is arranged around the rollers (6-3) and rotates and moves forward with the rollers (6-3); and a roller (6-6) is arranged below the belt (6-4); The negative pressure chute (8) is composed of a plurality of semicircular chute bodies (8-5) connected end to end, a connecting plate (8-7) is provided at both ends of the chute body (8-5), a through hole (8-8) is processed on the connecting plate (8-7), two adjacent chute bodies (8-5) are fixedly connected by a threaded fastening connector installed in the through hole (8-8), and a rubber groove (8-4) is provided on the inner wall of the chute body (8-5).
2. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 1 is characterized in that: The belt conveyor units (6) are provided in two groups, the two groups of belt conveyor units (6) are connected via a second bucket groove (11), and an obtuse angle is formed between the two groups of belt conveyor units (6), and the second bucket groove (11) is an arc-shaped structure.
3. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 1 is characterized in that: A vibrator (3) is provided on the outer wall of the receiving hopper (2), a material blocking plate (4) is provided at the lower part of the receiving hopper (2), and a guide hopper groove (5) is provided between the lower end of the receiving hopper (2) and the belt conveyor unit (6).
4. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 3 is characterized in that: Two groups of belt guide mechanisms are arranged on the steel truss (9) in the width direction, and the belt guide mechanisms are arranged between two adjacent groups of brackets (6-1).
5. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 4 is characterized in that: The belt guide mechanism is composed of a guide wheel (6-2) and a support rod (6-5) connected together. One end of the support rod (6-5) is fixed to the steel truss (9), and the other end is provided with a guide wheel (6-2). The guide wheel (6-2) can rotate relative to the support rod (6-5).
6. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 1 is characterized in that: The rubber groove (8-4) is provided with horizontal edges at both ends along the length direction, and the chute body (8-5) is provided with angle irons (8-9) at both ends along the length direction. The horizontal edges and the angle irons (8-9) extend into the U-shaped bolt clamp (8-1), and a gasket (8-3) is provided on the upper part of the horizontal edge in the U-shaped bolt clamp (8-1). The fastening bolt (8-2) penetrates through a side wall of the U-shaped bolt clamp (8-1) and fixes the horizontal edge and the angle iron (8-9) by pressing the gasket (8-3).
7. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 1 is characterized in that: Steel bars (8-6) are arranged at intervals along the length direction on the inner wall of the chute body (8-5).
8. The dam slope belt conveyor negative pressure chute concrete conveying device according to claim 1 is characterized in that: The distance between the lowest point of the chute body (8-5) and the lowest point of the rubber groove (8-4) is 8 to 10 cm.