Large longitudinal slope inclined shaft low-slump concrete transport vehicle

Abstract

The utility model belongs to a kind of big longitudinal slope inclined shaft low-slump concrete transport vehicle, including traction device, frame body and track wheel. Four track wheels are equipped in the lower end shaft of bottom frame, frame body is equipped in the upper end of bottom frame, hopper is equipped in frame body, pull-out type material door is equipped in the middle of hopper bottom, the bottom frame of hopper lower end and extend to frame body front end are equipped with conveyor belt support, the rear part of conveyor belt support is parallel with the upper end of bottom frame, the front part of conveyor belt support is located in the outer frame body front part and is inclined upward, the one end shaft of conveyor belt support in frame body is equipped with second rotary roller. The utility model can transport concrete to working face in big longitudinal slope inclined shaft, improve the transport efficiency of concrete, with the advantages of simple structure, high construction efficiency and good use effect.

Description

Technical Field

[0001] This utility model relates to a low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes. Background Technology

[0002] When constructing tunnels with steep longitudinal slopes (over 12%), traditional concrete mixer trucks cannot descend the slope in inclined shafts, preventing concrete from being transported to the designated work area. Currently, chutes and high-pressure pumps are commonly used for concrete transport in inclined shafts with steep longitudinal slopes. However, when using chutes, the concrete is prone to segregation due to gravity during transport, and low-slump concrete (slump < 120mm) lacks fluidity, easily causing blockages in the chute and hindering transport. While high-pressure pumps are feasible for short distances, they are prone to pipe blockages over distances exceeding 150m. Both of these traditional transport methods have drawbacks in inclined shafts with steep longitudinal slopes, affecting concrete construction progress and reducing construction efficiency. Summary of the Invention

[0003] The purpose of this invention is to design a low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes, which can transport concrete to the working face in inclined shafts with large longitudinal slopes, thereby improving the transportation efficiency of concrete. It has the advantages of simple structure, high construction efficiency and good performance.

[0004] Therefore, a low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes includes a traction device, a frame, and rail wheels. Four rail wheels are mounted on the lower axle of the undercarriage frame. The frame is located on the upper part of the undercarriage frame, and a hopper is located inside the frame. A pull-out material gate is located in the middle of the bottom of the hopper. A conveyor belt support is located on the undercarriage frame at the lower end of the hopper and extending to the front end of the frame. The rear part of the conveyor belt support is parallel to the upper end of the undercarriage frame, and the front part of the conveyor belt support is located outside the front of the frame and inclined upwards. A second rotary roller is mounted on one end of the conveyor belt support inside the frame, and a first rotary roller is mounted on the top of the conveyor belt support outside the frame. Several support rollers are mounted on the upper axle of the conveyor belt support between the first and second rotary rollers. A conveyor belt rotating between the first and second rotary rollers is mounted on the first, second, and support rollers. A traction hook is located in the middle of the rear side of the undercarriage frame, and one end of a steel wire rope is connected to the traction device.

[0005] As a preferred technical solution of this utility model, the traction device consists of a winch, a winch motor and a base. The winch motor is provided on the upper end of the base. The winch motor drives the winch wheel of the winch to rotate. One end of the wire rope is fixed on the winch wheel.

[0006] As a preferred embodiment of this utility model, the upper end of the frame is open, the hopper is inverted trapezoidal, the front of the upper end of the hopper is closed with a sealing plate, and the rear of the upper end of the hopper is open.

[0007] As a preferred technical solution of this utility model, a top pressure wheel frame is provided between the front side of the frame and the conveyor belt, and two top pressure wheels are provided on the front shaft of the top pressure wheel frame, with the two top pressure wheels respectively supporting the upper end face of the conveyor belt on both sides.

[0008] In a preferred embodiment of this utility model, the included angle between the upwardly inclined conveyor belt support located outside the frame and the upper surface of the undercarriage frame is 25°. 0 ~35°.

[0009] As a preferred embodiment of this utility model, a support rod is provided between the conveyor belt support located outside the frame body and the frame body.

[0010] As a preferred technical solution of this utility model, a motor is provided on the base frame corresponding to the second rotary roller, and the motor drives the second rotary roller to rotate through the motor shaft.

[0011] Compared with the prior art, the beneficial effects that this utility model can achieve are: (1) This utility model can be operated in a steep longitudinal slope inclined shaft, and can quickly and effectively transport concrete to the working face, thereby improving the transportation efficiency of concrete and thus improving the overall construction progress of the tunnel.

[0012] (2) This utility model reduces the segregation and spillage of concrete, improves construction quality, saves construction costs, and has the advantages of simple structure, high construction efficiency and good use effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model in use. Detailed Implementation Plan

[0014] The present invention will be further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of the present invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of the present invention. Unless otherwise specified, the materials, reagents, etc., used in the following embodiments are commercially available. Furthermore, unless otherwise explicitly stated and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0015] like Figures 1 to 2 As shown, a low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes includes a traction device, a frame 1, and rail wheels 9. A track 21 extending from the tunnel entrance to the working face is provided inside the tunnel 16. Four rail wheels 9 are mounted on the lower axle of the undercarriage frame 10, allowing the undercarriage frame to run on the track via these four rail wheels. The frame 1 is located at the upper end of the undercarriage frame 10, and a hopper 2 is located inside the frame. A pull-out material gate 3 is located in the middle of the bottom of the hopper. The upper end of the frame is open, and the hopper 2 is inverted trapezoidal. The front of the upper end of the hopper is sealed with a sealing plate 14 to prevent material from overflowing from the upper end of the hopper when it tilts forward. The rear of the upper end of the hopper is open, serving as the loading port.

[0016] A conveyor belt support 5 is installed on the bottom frame at the lower end of the hopper and extends to the front end of the frame. The rear part of the conveyor belt support 5 is parallel to the upper end of the bottom frame, and the front part of the conveyor belt support is located outside the front of the frame and inclined upwards. The angle between the upwardly inclined conveyor belt support outside the frame and the upper end face of the bottom frame is 25 degrees. 0 ~35°, optimal is 30° 0 A support rod 15 is provided between the conveyor belt support outside the frame and the frame body to strengthen the front end of the conveyor belt support.

[0017] A second rotary roller 11 is mounted on one end of the conveyor belt support within the frame, while a first rotary roller 4 is mounted on the top of the conveyor belt support outside the frame. Several support rollers 7 are mounted on the upper shaft of the conveyor belt support between the first and second rotary rollers 11 and the second rotary roller 4. A conveyor belt 6 rotates between the first and second rotary rollers on the first, second, and support rollers. A motor 12 is mounted on the undercarriage corresponding to the second rotary roller. The motor drives the second rotary roller to rotate via its motor shaft. The rotation of the second rotary roller, in turn, drives the first rotary roller and all support rollers to rotate clockwise via the conveyor belt. A pressure roller frame is located between the front of the frame and the conveyor belt at an angle. Two pressure rollers 8 are mounted on the front shaft of the pressure roller frame. These two pressure rollers 8 support the upper surface of the conveyor belt on both sides, guiding the conveyor belt without affecting the passage of concrete material between the two pressure rollers. The pressure rollers also prevent the conveyor belt from fluctuating during use, improving the stability of the conveyor belt operation.

[0018] A towing hook 13 is located at the center of the rear side of the undercarriage frame. One end of the towing hook is connected to a wire rope 17, and the other end of the wire rope is connected to the towing device. The towing device consists of a winch 20, a winch motor 19, and a base 18. The base 18 is fixed at the tunnel entrance, and the winch motor is located on the upper part of the base. The winch motor drives the winch wheel to rotate, and one end of the wire rope is fixed to the winch wheel.

[0019] In use, the transport vehicle of this invention is positioned on the track at the tunnel entrance. The pull-out material gate 3 of the hopper is closed, concrete is loaded into the hopper, and the winch motor is started to rotate the winch wheel clockwise. The wire rope is lowered and lowered from the winch wheel. Under the action of gravity, the transport vehicle of this invention slides along the track from the tunnel entrance to the designated working face inside the tunnel. Then, the winch motor is turned off. During construction, the pull-out material gate is pulled to open the hopper, and at the same time, the motor is started to drive the second rotary roller to rotate clockwise. The concrete falls along the hopper onto the conveyor belt and is transported to the designated location to complete the subsequent concrete construction work. Afterward, the winch motor is started to rotate the winch wheel counterclockwise, and the wire rope is retracted onto the winch wheel. The other end of the wire rope pulls the transport vehicle of this invention back to the track at the tunnel entrance for reloading.

[0020] Through theoretical calculations and simulation experiments, the optimal inclination angle range of the conveyor belt support was precisely determined. Within this range, the component of gravity acting on the concrete along the conveyor belt direction is balanced with the internal friction force of the concrete, ensuring sufficient stability of the concrete on the conveyor belt, effectively suppressing material slippage, while also maintaining transportation efficiency.

[0021] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes, comprising a traction device, a frame, and rail wheels, characterized in that: The lower end of the undercarriage frame has four rail wheels, and the upper end of the undercarriage frame has a frame body. Inside the frame body is a hopper, and the bottom center of the hopper has a pull-out material gate. The undercarriage frame at the lower end of the hopper and the front end of the frame body are equipped with a conveyor belt support. The rear part of the conveyor belt support is parallel to the upper end of the undercarriage frame, and the front part of the conveyor belt support is located outside the front of the frame body and is inclined upward. One end of the conveyor belt support inside the frame body is equipped with a second rotary roller, and the top of the conveyor belt support outside the frame body is equipped with a first rotary roller. Several support rollers are installed on the upper shaft of the conveyor belt support between the first and second rotary rollers. The first and second rotary rollers and the support rollers are equipped with a conveyor belt that rotates between the first and second rotary rollers. A traction hook is located in the middle of the rear side of the undercarriage frame. The traction hook is connected to one end of a steel wire rope, and the other end of the steel wire rope is connected to a traction device.

2. The low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes according to claim 1, characterized in that: The traction device consists of a winch, a winch motor, and a base. The winch motor is located on the upper part of the base. The winch motor drives the winch wheel to rotate, and one end of the wire rope is fixed to the winch wheel.

3. The low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes according to claim 1, characterized in that: The frame has an open top, the hopper is an inverted trapezoid, the front of the upper end of the hopper is sealed with a sealing plate, and the rear of the upper end of the hopper is open.

4. The low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes according to claim 1, characterized in that: A top pressure wheel frame is provided between the front side of the frame and the angle between the frame and the conveyor belt. The front shaft of the top pressure wheel frame is provided with two top pressure wheels, which respectively support the upper surface of the conveyor belt on both sides.

5. A low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes according to claim 1, characterized in that: The angle between the conveyor belt support, which is located outside the frame and tilted upwards, and the upper end face of the undercarriage frame is 25° to 35°.

6. A low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes according to claim 1, characterized in that: The conveyor belt support located outside the frame body is provided with a support rod between itself and the frame body.

7. A low-slump concrete transport vehicle for inclined shafts with large longitudinal slopes according to claim 1, characterized in that: A motor is installed on the base frame corresponding to the second rotary roller, and the motor drives the second rotary roller to rotate through the motor shaft.

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