Concrete backfilling vehicle for airport pipeline pre-burying construction

Abstract

The utility model belongs to the airport lamps construction technical field, concretely is a kind of concrete backfilling vehicle for airport pipeline pre-burying construction, including vehicle body, cab and hopper;Lifting hydraulic cylinder is equipped on vehicle body, and the telescopic end of lifting hydraulic cylinder is hinged with the front end bottom surface of hopper by second adapter shaft;The rear end of inner bottom surface of hopper is equipped with strip-shaped recess, and the bottom wall of strip-shaped recess is equipped with discharge port, and the guide tube that is communicated with discharge port is connected on hopper;Rotary shaft is rotatably connected in strip-shaped recess and is arranged along left and right direction, and the side wall of rotary shaft is equipped with helical vane, and helical vane is spirally extended from the end away from discharge port to the end close to discharge port, and the two helical vanes close to each other and the outside wall of rotary shaft enclose helical extension helical conveying channel, and helical conveying channel is communicated with discharge port;Further including the driving motor for driving rotary shaft rotation.Driving the vehicle along pre-backfilling line can complete pipeline trench backfilling operation, improve construction efficiency, save manpower.

Description

Technical Field

[0001] This utility model belongs to the field of airport lighting installation and construction technology, specifically relating to a concrete backfilling truck used for airport pipeline pre-embedding construction. Background Technology

[0002] Airport runway construction involves the installation of numerous navigation lights, communication equipment, fire-fighting equipment, and related pipelines. When pre-installing these pipelines, trenches are first reserved on the runway, and the pipelines are installed into these trenches according to design requirements. Concrete is then backfilled into the trenches, and finally, the pavement concrete is laid. Currently, there are two methods for backfilling concrete into the trenches: one is for construction workers to push wheelbarrows to the concrete mixer truck to collect the concrete, then push the wheelbarrows to the edge of the trench, and then use shovels to backfill the concrete into the trench; the other is to use a forklift to collect the concrete from the concrete mixer truck, drive it to the edge of the trench, and have workers pour the concrete into the trench using shovels. The wheelbarrows are typically small, commonly used on construction sites, with a small capacity, generally 0.2m. 3- 0.3m 3 Construction workers not only need to transport concrete back and forth multiple times, but also need to repeatedly swing shovels up and down to fill the trench with concrete from the cart. This not only results in high labor intensity and waste of manpower, but also low construction efficiency. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a concrete backfilling vehicle for airport pipeline pre-embedding construction, which improves the efficiency of concrete pouring and backfilling in airport pipeline trenches and saves manpower.

[0004] The technical solution adopted by this utility model to solve the technical problem is: a concrete backfilling truck for airport pipeline pre-embedding construction, including a vehicle body, wheels set at the lower part of the vehicle body, a driver's cab set at the front end of the vehicle body, and a hopper set at the rear end of the vehicle body; the rear end of the hopper is hinged to the vehicle body through a first adapter shaft, and a lifting hydraulic cylinder perpendicular to the ground is provided on the vehicle body below the front part of the hopper, and the telescopic end of the lifting hydraulic cylinder is hinged to the front bottom surface of the hopper through a second adapter shaft; the length direction of the first adapter shaft and the second adapter shaft are both arranged in the left-right direction; the rear end of the inner bottom surface of the hopper is provided with a strip-shaped groove with its length arranged in the left-right direction, and a discharge port is opened on the bottom wall of one end of the strip-shaped groove; a guide pipe connected to the discharge port is provided on the bottom wall of the hopper;

[0005] The strip-shaped groove is provided with a rotating shaft that is rotatably connected to the hopper. The length direction of the rotating shaft is arranged in the left-right direction. The side wall of the rotating shaft located in the strip-shaped groove is provided with a spiral blade that extends spirally from one end away from the discharge port to one end close to the discharge port. Two adjacent spiral blades and the outer side wall of the rotating shaft form a spirally extending spiral conveying channel, which is connected to the discharge port.

[0006] The vehicle body is also equipped with a drive motor for driving the rotating shaft to rotate, and the drive motor is connected to the rotating shaft in a transmission manner.

[0007] Furthermore, the bottom surface of the hopper is welded with multiple transverse reinforcing ribs and multiple longitudinal reinforcing ribs, both of which are parallel to the horizontal plane; both the transverse and longitudinal reinforcing ribs are rectangular steel pipes.

[0008] Furthermore, the inner bottom surface of the hopper is an inclined surface that slopes downwards from front to back.

[0009] Furthermore, the length of the projection of the guide tube on the horizontal plane is arranged in the left-right direction, and the guide tube is arranged inclined upward from the direction away from the discharge port to the direction closer to the discharge port.

[0010] The lower end of the guide pipe protrudes outward from the wheel and the hopper in the left-right direction, and the lower end of the guide pipe is spaced apart from the lowest point of the wheel.

[0011] Furthermore, the side wall of the feed tube is provided with a slot that connects the inner cavity of the feed tube and the external space. A throttling plate perpendicular to the side wall of the feed tube is inserted into the slot and the two are fitted with a clearance. One end of the throttling plate is located in the inner cavity of the feed tube, and the other end of the throttling plate is located outside the feed tube.

[0012] Furthermore, the drive motor has a drive shaft, on which a drive sprocket rotates synchronously; one end of the rotating shaft protrudes from the outer wall of the hopper and a driven sprocket that rotates synchronously is fitted and fixed thereon; the drive sprocket and the driven sprocket are connected by a transmission chain.

[0013] Furthermore, a dust cover is provided on the outside of the hopper, which covers the outside of the drive sprocket, driven sprocket and transmission chain.

[0014] Furthermore, it also includes a hydraulic station for driving and controlling the telescopic movement of the telescopic rod of the lifting hydraulic cylinder; the hydraulic station includes an oil tank, a hydraulic pump and a hydraulic pump distributor, the inlet of the hydraulic pump is connected to the outlet of the oil tank, and the inlet of the hydraulic pump distributor is connected to the outlet of the hydraulic pump.

[0015] The drive motor is a hydraulic motor; the inlet of the lifting hydraulic cylinder and the inlet of the hydraulic motor are both connected in parallel to the same outlet of the hydraulic pump through the hydraulic pump distributor, and the outlet of the lifting hydraulic cylinder and the outlet of the hydraulic motor are both connected in parallel to the same hydraulic return pipe of the hydraulic station through the hydraulic pump distributor.

[0016] Furthermore, the hydraulic pump is equipped with a first manual directional valve and a second manual directional valve; the first manual directional valve is used to control the flow direction of oil in the hydraulic circuit of the lifting hydraulic cylinder, and the second manual directional valve is used to control the flow direction of oil in the hydraulic circuit of the drive motor; the hydraulic pump is located behind the seat in the cab, and the adjustment handles on the first manual directional valve and the second manual directional valve are both arranged facing forward.

[0017] Furthermore, it also includes an oil cooler, the inlet of which is connected to the outlet of the hydraulic return oil pipe, and the outlet of which is connected to the inlet of the oil tank.

[0018] Compared with the prior art, the beneficial effects of this utility model are: it provides a concrete backfilling truck for airport pipeline pre-embedding construction, which allows operators to complete the concrete backfilling and pouring of pipeline trenches while driving the vehicle along the pre-backfilling line, thereby improving the efficiency of pipeline trench backfilling, reducing the labor intensity of operators, and saving manpower. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the axial structure of one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the rear view structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the left-side structure of this utility model;

[0022] Figure 4 This is a schematic diagram of the right-side structure of this utility model.

[0023] Figure 5 It is along Figure 2 A schematic diagram of the cross-sectional structure along the AA direction of the mid-section line of sight;

[0024] Figure 6 It is along Figure 2 Schematic diagram of the cross-sectional structure along the BB direction of the mid-section;

[0025] Figure 7 yes Figure 5 Enlarged structural diagram of section C;

[0026] Reference numerals: 1-Body; 11-Wheel; 12-Cab; 121-Transverse reinforcing rib; 122-Longitudinal reinforcing rib; 2-Hopper; 21-Strip groove; 22-Discharge port; 23-Left side plate; 24-Right side plate; 25-Dust cover; 3-Lifting hydraulic cylinder; 4-Guide pipe; 41-Throttle plate; 5-Rotating shaft; 51-Spiral blade; 52-Spiral conveying channel; 6-Drive motor; 61-Drive shaft; 62-Drive sprocket; 63-Driven sprocket; 64-Transmission chain; 8-Hydraulic pump; 91-Oil tank; 95-First manual directional valve; 96-Second manual directional valve; 97-Oil cooler. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] As attached Figure 1-7 As shown, a concrete backfilling truck for airport pipeline pre-embedding construction includes a vehicle body 1, wheels 11 located on the lower part of the vehicle body 1, a driver's cab 12 located at the front end of the vehicle body 1, and a hopper 2 located at the rear end of the vehicle body. The rear end of the hopper 2 is hinged to the vehicle body 1 via a first adapter shaft. A lifting hydraulic cylinder 3 perpendicular to the ground is provided on the vehicle body 1 below the front part of the hopper 2. The telescopic end of the lifting hydraulic cylinder 3 is hinged to the bottom surface of the front end of the hopper 2 via a second adapter shaft. The length direction of both the first adapter shaft and the second adapter shaft is arranged along the left-right direction. The rear end of the bottom surface of the hopper 2 has a strip-shaped groove 21 with its length arranged along the left-right direction. A discharge port 22 is opened on the bottom wall of one end of the strip-shaped groove 21. The bottom wall of the hopper 2 is provided with a guide pipe 4 that communicates with the discharge port 22; the strip groove 21 is provided with a rotating shaft 5 that is rotatably connected to the hopper 2, and the length direction of the rotating shaft 5 is arranged in the left-right direction; the side wall of the rotating shaft 5 located in the strip groove 21 is provided with a spiral blade 51 that spirally extends from one end away from the discharge port 22 to the end closer to the discharge port 22, and two adjacent spiral blades 51 and the outer side wall of the rotating shaft 5 form a spirally extending spiral conveying channel 52, which is connected to the discharge port 22; the vehicle body 1 is also provided with a drive motor 6 for driving the rotating shaft 5 to rotate, and the drive motor 6 is connected to the rotating shaft 5 in a transmission manner.

[0029] like Figure 1As shown, the front-to-back direction of this utility model is the X-direction, and the left-to-right direction is the Y-direction. This utility model can be modified based on existing agricultural tricycles, such as those from brands like Wuzheng and Shifeng. These tricycles have a larger hopper capacity than the single-wheeled carts commonly used on construction sites, and are smaller and more flexible than large trains. The agricultural tricycle includes a body 1, wheels 11, a cab 12, a hopper 2, a lifting hydraulic cylinder 3, and a hydraulic system for driving the lifting hydraulic cylinder 3. The outer edge of the spiral blade 51 is spaced apart from the groove wall of the strip groove 21, with the outer edge of the spiral blade 51 closer to the discharge port 22 than its inner edge. All spiral blades 51 are completely located within the strip groove 21.

[0030] Before concrete backfilling, the pipeline is installed in the pipeline trench as required. The hopper 2 and the strip-shaped groove 21 within the hopper 2 are filled with concrete of suitable fluidity. The operator drives the vehicle from the cab 12 to the pouring point, ensuring the lower end of the guide pipe 4 is directly above the pipeline trench. After this operation, the concrete backfilling of the pipeline trench begins. The concrete in the strip-shaped groove 21 enters the spiral conveying channel 52 formed by the spiral blades 51 and the rotating shaft 5. The drive motor 6 is started, driving the rotating shaft 5 to rotate. The rotating shaft 5 drives the spiral blades 51 to rotate synchronously. During the rotation of the spiral blades 51, the concrete in the spiral conveying channel 52 is continuously transported to the discharge port 22, then enters the guide pipe 4, and finally backfills into the pipeline trench through the lower end of the guide pipe 4. While the drive motor 6 is operating, the operator drives the vehicle along the backfilling line, causing the guide pipe 4 to move continuously above the line, backfilling the pipeline trench with concrete. When the amount of concrete in hopper 2 is low, to ensure that there is always concrete in the strip groove 21, the lifting hydraulic cylinder 3 lifts the front end of hopper 2, causing hopper 2 to rotate around the first transition shaft and then tilt downwards from front to back, thereby ensuring that the concrete in hopper 2 slides down into the strip groove 21. Using this invention to pour concrete into pipeline trenches not only improves the backfilling efficiency of pipeline trenches but also reduces the labor intensity of workers and saves manpower.

[0031] The hopper 2 is used to hold concrete. To prevent deformation of the bottom plate of the hopper 2 and to improve its strength, preferably, the bottom surface of the hopper 2 is welded with multiple transverse reinforcing ribs 121 and longitudinal reinforcing ribs 122. Both the transverse reinforcing ribs 121 and the longitudinal reinforcing ribs 122 are parallel to the horizontal plane and perpendicular to each other. The reinforcing ribs can be made of angle steel, steel plates, or steel pipes. Considering that rectangular steel pipes are lighter and have higher rigidity, rectangular steel pipes are generally preferred for the transverse reinforcing ribs 121 and the longitudinal reinforcing ribs 122.

[0032] The strip groove 21 is used to radially restrict the concrete within the spiral conveying channel 52, ensuring that the concrete is transported to the discharge port 22 under the rotation of the spiral blades 51. Additionally, it also allows the concrete above to slide down into it under gravity. The strip groove 21 can be a V-shaped groove, U-shaped groove, or other structures. In this invention, it is preferred that the cross-section of the strip groove 21 is an upward-opening arc-shaped structure, which is easy to process and ensures that the distance between the groove wall and the outer edge of the spiral blades is the same, making installation and alignment easier. The discharge port 22 can be a hole of any shape, such as a round hole or a square hole, penetrating the bottom surface of the hopper 2 in the vertical direction. During the pouring operation, to avoid insufficient concrete in the strip groove 21 of the hopper 2 without timely intervention by the operators, the tilt angle of the hopper 2 should be adjusted. Preferably, the inner bottom surface of the hopper 2 is an inclined surface arranged downwards from front to back. The inclined inner bottom surface of the hopper 2 will cause the concrete to slide down into the strip groove 21 under its own weight, ensuring that the amount of concrete backfilled into the trench is always sufficient, thus improving the reliability of this utility model.

[0033] The guide pipe 4 is used to guide the concrete flowing from the outlet 22 into the pipeline trench. Preferably, the length of the guide pipe 4's projection on the horizontal plane is arranged in the left-right direction, and the guide pipe 4 is arranged inclined upwards from the direction away from the outlet 22 towards the direction closer to the outlet 22; the lower end of the guide pipe 4 protrudes outwards from the wheel 11 and the hopper 2 in the left-right direction, and the lower end of the guide pipe 4 is spaced apart from the lowest point of the wheel 11. This avoids damage to the pipeline trench caused by the wheel being too close when the lower end of the guide pipe 4 is above the pipeline trench, preventing vehicle rollover and safety accidents, and also avoids damage to the guide pipe 4 from friction with the ground during vehicle operation. The guide pipe 4 can be a rubber hose, steel pipe, PVC pipe, etc.

[0034] Preferably, the side wall of the feed pipe 4 is provided with a slot connecting the inner cavity of the feed pipe 4 and the external space. A throttling plate 41 perpendicular to the side wall of the feed pipe 4 is inserted into the slot, and the two are in clearance fit. One end of the throttling plate 41 is located in the inner cavity of the feed pipe 4, and the other end of the throttling plate 41 is located outside the feed pipe 4. The throttling plate 41 is slidably fitted with the outer side wall of the slot. By adjusting the depth of the throttling plate 4 inserted into the feed pipe 4, the cross-sectional area of ​​the effective material channel of the feed pipe 4 can be adjusted, thereby controlling the backfilling speed of concrete. When the hopper 2 contains concrete or when the rotating shaft 5 stops rotating, the throttling plate 4 is also used to prevent concrete from continuing to flow out from the lower port of the feed pipe 4.

[0035] The rotating shaft 5 drives the spiral blades 51 on it to rotate synchronously. The left and right side plates of the hopper 2 are provided with through holes arranged along the left-right direction, allowing the rotating shaft 5 to be rotatably connected to the through holes on the left side plate 23 and right side plate 24 of the hopper 2 with a clearance fit. Specifically, both the left side plate 23 and right side plate 24 of the hopper 2 are provided with through holes extending from left to right, and the through holes on the left side plate 23 and right side plate 24 are coaxially arranged; both ends of the rotating shaft 5 are located within the through holes, and the rotating shaft 5 and the through holes are rotatably connected by rolling bearings.

[0036] The helical blade 51 is used to transport the concrete in the strip groove 21 to the discharge port 22. The helical blade 51 is generally welded to the outer wall of the rotating shaft 5 by full welding. In order to prevent concrete residue from solidifying at the end of the strip groove 21 away from the discharge port, the gap between the end face of the helical blade 51 and the end face of the strip groove 21 is less than 10mm.

[0037] The rotating shaft of the drive motor 6 can be connected to the rotating shaft 5 via gear transmission, synchronous belt transmission, chain transmission, etc. Given the high dust levels at the construction site and the need for significant load-bearing capacity to rotate the rotating shaft 5, preferably, the drive motor 6 has a drive shaft 61, on which a drive sprocket 62 rotates synchronously. One end of the rotating shaft 5 protrudes from the outer wall of the hopper 2, and a driven sprocket 63, rotating synchronously, is fitted and fixed thereon. The drive sprocket 62 and the driven sprocket 63 are connected by a transmission chain 64. When the drive motor 6 is started, its rotation drives the drive sprocket 62 to rotate synchronously. The drive sprocket 62, through the transmission chain 64, drives the driven sprocket 63 to rotate, which in turn drives the rotating shaft 5 to rotate. As a further preferred embodiment, a dust cover 25 is also provided on the outside of the hopper 2, covering the drive sprocket 62, the driven sprocket 63, and the transmission chain 64. This prevents dust at the construction site from affecting the transmission operation of the chain and sprockets. The dust cover can be installed on the outside of the hopper 2 by bolt connection.

[0038] The agricultural tricycle is equipped with a hydraulic station for controlling the lifting movement of the lifting hydraulic cylinder 3. This hydraulic station and the lifting hydraulic cylinder 3 form a double-acting hydraulic cylinder circuit. The hydraulic station generally includes an oil tank 91, a hydraulic pump connected to the outlet of the oil tank 91, and a reversing valve connected to the outlet of the hydraulic pump. The outlet of the hydraulic pump is connected to the rod chamber 31 and the rodless chamber 32 of the lifting hydraulic cylinder 3 through the reversing valve. By adjusting the reversing valve, the high-pressure oil drawn from the hydraulic oil tank 91 by the hydraulic pump can enter the rodless chamber of the lifting hydraulic cylinder 3, and the hydraulic oil entering the rodless chamber of the lifting hydraulic cylinder 3 pushes the extension rod of the lifting hydraulic cylinder 3 to extend. By adjusting the reversing valve in the opposite direction, the hydraulic pump can draw the high-pressure oil from the hydraulic oil tank 91 into the rod chamber of the lifting hydraulic cylinder 3, which then pushes the extension rod of the lifting hydraulic cylinder 3 to retract.

[0039] The drive motor 6 can be a hydraulic motor or an electric motor. Since most agricultural tricycles on the market are equipped with a hydraulic station to control the lifting operation of the lifting hydraulic cylinder 3, the drive motor 6 of this invention is preferably a hydraulic motor. Preferably, it also includes hydraulic power for driving and controlling the extension and retraction of the telescopic rod of the lifting hydraulic cylinder 3; the hydraulic station includes an oil tank 91, a hydraulic pump, and a hydraulic distributor 8, with the inlet of the hydraulic pump connected to the outlet of the oil tank 91. The inlet of the hydraulic distributor 8 is connected to the outlet of the hydraulic pump; the drive motor 6 is a hydraulic motor; the inlets of the lifting hydraulic cylinder 3 and the hydraulic motor are both connected in parallel to the same outlet of the hydraulic pump through the hydraulic distributor 8, and the outlets of the lifting hydraulic cylinder 3 and the hydraulic motor are both connected in parallel to the same hydraulic return pipe of the hydraulic station through the hydraulic distributor 8. The hydraulic pump 8 can distribute the high-pressure oil output from the hydraulic station to the lifting hydraulic cylinder 3 and the hydraulic motor according to the system requirements, ensuring that the lifting hydraulic cylinder 3 and the hydraulic motor can obtain the required pressure and flow, thereby achieving precise motion control of the two.

[0040] The hydraulic pump 8 is typically used in conjunction with a directional control valve to control the flow direction of hydraulic fluid. By changing the flow direction of the fluid, the direction of movement of the actuator can be controlled. Specifically, the hydraulic pump 8 is equipped with a first manual directional valve 95 and a second manual directional valve 96; the first manual directional valve 95 controls the flow direction of the fluid in the hydraulic circuit of the lifting hydraulic cylinder 3, and the second manual directional valve 96 controls the flow direction of the fluid in the hydraulic circuit of the drive motor 6; the hydraulic pump 8 is located behind the seat in the cab 12, and the adjustment handles on the first manual directional valve 95 and the second manual directional valve 96 are both arranged facing forward. While driving, the driver can directly operate the first manual directional valve 95 and the second manual directional valve 96 to control the start and stop of the hydraulic pump 8 and the drive motor 6, saving manpower and improving work efficiency.

[0041] Considering the increased number of hydraulic actuators on the vehicle, the simultaneous operation of the hydraulic motor and the lifting hydraulic cylinder 3 can cause a sharp rise in the temperature of the oil returning to the oil tank 91. Preferably, an oil cooler 97 is also included, with its inlet connected to the outlet of the hydraulic return pipe and its outlet connected to the inlet of the oil tank 91. The high-temperature oil returning to the oil tank 97 is cooled by the oil cooler 97 before returning to the oil tank 97, improving the cooling and heat dissipation performance of the oil circuit, preventing hydraulic actuator failure due to elevated oil temperature in the hydraulic circuit, and ensuring stable operation of the hydraulic equipment. The oil cooler is a commercially available oil cooling device.

[0042] In the description of this utility model, the terms "upper," "lower," "top," "bottom," "front," "rear," "left," "right," and "side" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figure. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe the positional relationship in the figure are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0043] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A concrete backfilling truck for airport pipeline pre-embedding construction, comprising a vehicle body (1), wheels (11) disposed on the lower part of the vehicle body (1), a cab (12) disposed at the front end of the vehicle body (1), and a hopper (2) disposed at the rear end of the vehicle body; the rear end of the hopper (2) is hinged to the vehicle body (1) via a first adapter shaft, and a lifting hydraulic cylinder (3) perpendicular to the ground is provided on the vehicle body (1) below the front part of the hopper (2), the telescopic end of the lifting hydraulic cylinder (3) being hinged to the bottom surface of the front end of the hopper (2) via a second adapter shaft; the length directions of the first adapter shaft and the second adapter shaft are both arranged along the left-right direction; characterized in that: The bottom surface of the hopper (2) is provided with a strip groove (21) with its length arranged in the left and right direction. A discharge port (22) is provided on the bottom wall of one end of the strip groove (21). A guide pipe (4) connected to the discharge port (22) is provided on the bottom wall of the hopper (2). The strip groove (21) is provided with a rotating shaft (5) that is rotatably connected to the hopper (2). The length direction of the rotating shaft (5) is arranged in the left-right direction. The side wall of the rotating shaft (5) located in the strip groove (21) is provided with a spiral blade (51) that spirally extends from one end away from the discharge port (22) to the end close to the discharge port (22). Two adjacent spiral blades (51) and the outer side wall of the rotating shaft (5) form a spirally extending spiral conveying channel (52). The spiral conveying channel (52) is connected to the discharge port (22). The vehicle body (1) is also provided with a drive motor (6) for driving the rotating shaft (5) to rotate, and the drive motor (6) is connected to the rotating shaft (5) in a transmission connection.

2. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 1, characterized in that: The bottom surface of the hopper (2) is welded with a plurality of transverse reinforcing ribs (121) and a plurality of longitudinal reinforcing ribs (122), both of which are parallel to the horizontal plane; both of which are rectangular steel pipes.

3. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 1, characterized in that: The inner bottom surface of the hopper (2) is an inclined surface that slopes downward from front to back.

4. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 1, characterized in that: The length of the projection of the guide tube (4) on the horizontal plane is arranged in the left-right direction, and the guide tube (4) is arranged inclined upward from the direction away from the discharge port (22) to the direction closer to the discharge port (22); The lower end of the guide pipe (4) protrudes outward from the wheel (11) and the hopper (2) in the left-right direction, and the lower end of the guide pipe (4) is arranged at a distance from the lowest point of the wheel (11).

5. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 4, characterized in that: The side wall of the feed tube (4) is provided with a slot that connects the inner cavity of the feed tube (4) and the external space. A throttling plate (41) perpendicular to the side wall of the feed tube (4) is inserted into the slot and the two are fitted with a clearance. One end of the throttling plate (41) is located in the inner cavity of the feed tube (4) and the other end of the throttling plate (41) is located outside the feed tube (4).

6. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 4, characterized in that: The drive motor (6) has a drive shaft (61), and the drive shaft (61) is provided with a drive sprocket (62) that rotates synchronously therewith; one end of the rotating shaft (5) protrudes from the outer wall of the hopper (2) and a driven sprocket (63) that rotates synchronously therewith is sleeved and fixed thereon; the drive sprocket (62) and the driven sprocket (63) are connected by a transmission chain (64).

7. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 6, characterized in that: The hopper (2) is also provided with a dust cover (25) on the outside, which covers the outside of the drive sprocket (62), the driven sprocket (63) and the transmission chain (64).

8. The concrete backfill truck for airport pipeline pre-embedding construction according to any one of claims 1-7, characterized in that: It also includes a hydraulic station for driving and controlling the telescopic movement of the telescopic rod of the lifting hydraulic cylinder (3); the hydraulic station includes an oil tank (91), a hydraulic pump and a hydraulic pump (8), the inlet of the hydraulic pump is connected to the outlet of the oil tank (91), and the inlet of the hydraulic pump (8) is connected to the outlet of the hydraulic pump. The drive motor (6) is a hydraulic motor; the inlet of the lifting hydraulic cylinder (3) and the inlet of the hydraulic motor are both connected in parallel to the same outlet of the hydraulic pump through the hydraulic pump (8), and the outlet of the lifting hydraulic cylinder (3) and the outlet of the hydraulic motor are both connected in parallel to the same hydraulic return pipe of the hydraulic station through the hydraulic pump (8).

9. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 8, characterized in that: The hydraulic pump (8) is equipped with a first manual directional valve (95) and a second manual directional valve (96); the first manual directional valve (95) is used to control the flow direction of oil in the hydraulic circuit of the lifting hydraulic cylinder (3), and the second manual directional valve (96) is used to control the flow direction of oil in the hydraulic circuit of the drive motor (6); the hydraulic pump (8) is located behind the seat in the cab (12), and the adjustment handles on the first manual directional valve (95) and the second manual directional valve (96) are both arranged facing forward.

10. The concrete backfill truck for airport pipeline pre-embedding construction according to claim 9, characterized in that: It also includes an oil cooler (97), the inlet of which is connected to the outlet of the hydraulic return oil pipe, and the outlet of which is connected to the inlet of the oil tank (91).

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