A concrete pouring trolley for construction of a train pit and an operation method thereof

Abstract

The application discloses a concrete pouring trolley for train maintenance pit construction and an operation method thereof, and relates to the field of construction machinery, in particular to a concrete pouring trolley for train maintenance pit construction. The trolley comprises a travelling part and a pouring part. The travelling part comprises a chassis, a wheel assembly installed on the chassis and a travelling control system. The pouring part comprises a concrete bin which is arranged on the chassis, and a stirring device is arranged in the bin. A discharge control system is arranged at the bottom of the bin. The wheel assembly comprises at least four wheels which are arranged in pairs and oppositely, and the wheels are track-adhering wheels, so that the trolley can run on a steel rail. The travelling control system is used for controlling the speed and running of the trolley. The discharge control system is used for adjusting the discharge angle and the discharge amount of the concrete. In the construction process, the pouring speed of the concrete is controlled by the cooperation of the discharge control system and the travelling control system, so that the pouring quality is ensured, the cost of measuring equipment is saved, the structural precision of pouring meets the design requirements, and the trolley has good practical value and application prospect.

Description

Technical Field

[0001] This invention relates to rail transit, specifically to a concrete pouring trolley for constructing train maintenance pits and its operation method. Background Technology

[0002] In recent years, my country's high-speed rail construction has developed rapidly, leading to a surge in the number of high-speed trains. Consequently, high-speed train maintenance depots, serving as "high-speed train 4S shops," have sprung up like mushrooms after rain. These depots primarily undertake the daily operational inspection and maintenance work of trains. Due to the long length, heavy weight, and evenly distributed structure of train bodies, wall-mounted and column-mounted maintenance pits are commonly used in their design to meet the needs of train maintenance.

[0003] The train maintenance pit consists of a maintenance trench, track supports, and rails. The rails are fixed to the track supports with fasteners. The maintenance trench is located on both sides of the track, forming a continuous trench foundation. Hidden columns are added at corresponding positions on the track supports to create a safe and reliable dedicated passage for train maintenance. The construction of the train maintenance pit typically involves first laying the track supports and rails, and then pouring the column-type inspection pit and wall-type maintenance pit according to the construction plan. The construction quality directly affects the subsequent train maintenance work. The pouring of the sidewalls is a crucial step in the construction of the trench sidewalls. Therefore, a series of measures and equipment are needed to ensure the quality of the train maintenance pit pouring. For example, precisely controlling the concrete mix ratio, pouring temperature, and vibration intensity are essential to ensure the strength and density of the sidewalls. Simultaneously, advanced measurement technology and equipment are required to ensure that the geometric dimensions and positional accuracy of the sidewalls meet design requirements. Only in this way can a solid foundation be laid for the high-quality construction of the train maintenance depot.

[0004] However, due to the complex terrain and limited space in the construction area, large machinery cannot enter the work site, and the pouring of concrete for the train maintenance pit often faces some thorny problems, especially the inconvenience of concrete transportation. To ensure the smooth progress of the pouring work, the concrete for the train maintenance pit is currently mainly transported by handcarts or by pumps. However, these two methods have the following main drawbacks: 1) Low construction efficiency. Relying on manual labor to transport concrete using wheelbarrows results in a limited amount of concrete that can be transported each time. The transportation speed is slow, and there are many round trips. This not only requires a lot of labor and is hard work, but also results in low transportation efficiency, which affects the progress of the pouring construction.

[0005] 2) High construction costs. Due to the high precision requirements for the construction of train maintenance pits, even if concrete is transported by pumping, high-precision measuring equipment and professional technicians are needed to operate and monitor the process to ensure the quality of the pouring. These devices are expensive, and the cost of technical personnel is high, resulting in high construction costs. When concrete can only be transported manually, labor costs will increase further, leading to an overall increase in construction costs.

[0006] 3) Poor construction quality. Strict control of the concrete pouring speed is crucial during the construction of the train maintenance pit to ensure quality. The pouring speed must be neither too fast nor too slow. Pouring too quickly can easily lead to voids or unevenness, while pouring too slowly can cause the previously poured concrete to begin setting, resulting in cold joints between the old and new concrete when later pours combine, affecting subsequent train maintenance work. When using pumps to transport concrete, the long, narrow sidewalls of the pit require even pumping, making speed control difficult. Manually transporting concrete using wheelbarrows makes timely supply challenging. Furthermore, concrete cannot be mixed during transport and pouring using wheelbarrows, leading to segregation and hardening of the concrete mix, resulting in reduced structural strength, poor performance, and compromised construction quality.

[0007] Therefore, how to ensure the smooth and high-quality construction of the train maintenance pit, while reducing construction costs and ensuring the quality of the pouring, remains an urgent problem to be solved in the construction of the train maintenance pit. Summary of the Invention

[0008] To address the aforementioned problems in the construction of train maintenance pits, this invention provides a concrete pouring trolley for train maintenance pit construction and its operation method. This trolley can replace manual pushing and pumping methods for conveying concrete, improving construction efficiency and significantly reducing construction costs. Simultaneously, the trolley runs close to the rail and is equipped with a speed control system and a material discharge control system to control the concrete pouring speed and angle, ensuring construction quality. The specific technical solution is as follows: First, this invention provides a concrete pouring trolley for train maintenance pit construction, comprising a traveling section and a pouring section; the traveling section includes a chassis, wheel assemblies mounted on the chassis, and a traveling control system; the pouring section includes a concrete silo, which is set on the chassis, with a mixing device inside and a discharge control system at the bottom; the wheel assembly includes at least four wheels arranged in pairs facing each other, these wheels are rail-mounted wheels, enabling the trolley to run on the rails; the traveling control system is used to control the trolley's speed and movement; the discharge control system is used to adjust the concrete discharge angle and the concrete discharge amount; during construction, the discharge control system cooperates with the traveling control system to control the concrete pouring speed of the train maintenance pit.

[0009] The aforementioned concrete pouring trolley for train maintenance pit construction includes a wheel assembly that further comprises at least four bearing sleeves fixedly arranged in pairs on the underside of the chassis, at least two axles corresponding to the bearing sleeves, and the track-attaching wheels installed at both ends of the axles.

[0010] The aforementioned concrete pouring trolley used for train maintenance pit construction includes a driving control system comprising a driving motor, a controller, a battery, a control lever, and a braking assembly. The driving motor, controller, and battery are all mounted under the chassis and connected in series. The driving motor drives the wheels to travel along the rails, and the controller controls the driving status. The control lever is mounted on the chassis and includes a speed control handle, a gear selector knob, and a cruise control button. The speed control handle adjusts the speed at any gear. The cruise control button controls the trolley to cruise at a specified speed. The braking assembly, used to slow down or stop the trolley, includes a brake disc and a disc brake, as well as a brake lever and a brake button mounted on the control lever. The brake disc is mounted on the axle and close to the wheel. When the brake lever is pulled, the disc brake clamps the brake disc, and simultaneously, the brake lever presses the brake button to disconnect the battery, stop the driving motor, and slow down the trolley.

[0011] The aforementioned concrete pouring trolley used for train maintenance pit construction has a gear selector knob with 0-speed, 1-speed, 2-speed, and reverse gear. In 0-speed gear, the trolley is off. In 1-speed gear, the trolley's maximum allowable speed meets the requirements for concrete pouring in the train maintenance pit. In 2-speed gear, the trolley can reach its maximum speed. In reverse gear, the trolley travels backward. In any gear, the speed can be adjusted using the speed control handle, and the trolley can maintain a constant speed at the speed indicated by pressing the cruise control button and releasing the speed control handle. When traveling at a constant speed, rotating the speed control handle, rotating the gear selector knob, or engaging the brake lever can all interrupt the constant speed travel.

[0012] The aforementioned concrete pouring trolley used for train maintenance pit construction has a concrete silo outlet located on the silo floor. The discharge control system includes a guide channel surrounding the concrete silo outlet and a traction assembly for controlling the opening and closing of the guide channel and adjusting the guide angle. The guide channel includes a straight guide section and an inclined guide section. The straight guide section is sleeve-shaped, with its upper end tightly attached to the bottom of the concrete silo and surrounding the concrete silo outlet for smooth concrete discharge. The inclined guide section connects to the lower end of the straight guide section and includes a straight wall extending from the straight guide section and a guide plate hinged to one side of the lower end of the straight guide section. A trolley outlet is located on the side opposite the guide plate. The guide plate is used to change the flow direction of the concrete, directing it towards the trolley outlet. The traction assembly is used to pull and adjust the guide plate closer to or further away from the lower end of the straight guide section, thereby controlling the concrete discharge volume and adjusting the discharge angle.

[0013] The aforementioned concrete pouring trolley used for train maintenance pit construction has a guide plate with an area not less than the concrete silo outlet area. A leak-proof soft plate is affixed to the joint where it is hinged to the straight diversion section. Leak-proof sealing rings are provided on the two sides adjacent to the hinge edge, and a traction hole is provided on the side away from the hinge edge. An extension plate is attached to the back of the guide plate, with a width equal to the guide plate, which can be pushed forward from the back of the guide plate to adjust the concrete pouring position. The traction assembly includes an adjusting crossbar connected to the gearbox output shaft, an adjusting handle connected to the gearbox input shaft, and a traction rope. The adjusting crossbar is positioned higher than the lower end of the straight diversion section. One end of the traction rope passes through the traction hole in the guide plate, and the other end is fixed to the adjusting crossbar. By shaking the adjusting handle to rotate the gear inside the gearbox, the adjusting crossbar rotates around its axis, causing the traction rope to wind up or unwind, adjusting the hinge angle between the guide plate and the straight diversion section, thereby adjusting the concrete discharge rate and angle or stopping the discharge.

[0014] Preferably, the concrete pouring trolley used for the construction of the aforementioned train maintenance pit has two concrete silo outlets, symmetrically arranged on the side of the silo bottom plate near the wheels; and the bottom plate of the concrete silo is symmetrically inclined towards the concrete silo outlets to facilitate the smooth flow of concrete from the outlets; there are two gearboxes, each located on the upper side of the trolley outlet; both gearboxes are 45-degree orthogonal gearboxes, one being the main gearbox and the other being the auxiliary gearbox; one output shaft of the main gearbox is connected to the input shaft of the auxiliary gearbox via an adjusting rod, and the discharge volume and discharge angle of the two trolley outlets are adjusted simultaneously by shaking the adjusting handle on the main gearbox.

[0015] The aforementioned concrete pouring trolley used for train maintenance pit construction has a pad layer between the concrete silo and the trolley chassis. This pad layer is a frame structure welded from square steel, which provides space for the installation of the discharge control system under the concrete silo. One end of the trolley chassis is also equipped with a steering wheel assembly, which includes two universal wheels connected to one end of the trolley chassis by support rods. The support rods are adjusting screws. During the pouring construction phase, the universal wheels are raised by adjusting the support rods, allowing the trolley to travel along the track. During the non-pouring construction phase, the universal wheels are lowered by adjusting the support rods, which is used to adjust the steering when the trolley is moved on the ground.

[0016] The concrete pouring trolley used for the construction of the aforementioned train maintenance pit includes a mixing device comprising a mixing column installed on the bottom plate of the concrete silo, a mixing motor built into the mixing column, mixing limbs sleeved on the mixing column, and mixing blades installed on the mixing limbs. The mixing motor is connected to a battery on the chassis of the trolley, and a mixing switch is provided on the control faucet to switch the mixing motor to drive the mixing limbs and mixing blades to rotate around the mixing column and mix the concrete.

[0017] Secondly, this invention provides a method for constructing a train maintenance pit, using the aforementioned trolley for concrete pouring; specifically, it includes the following steps: 1) Preparation: Set up the formwork for the train maintenance pit to be poured and prepare the concrete material for pouring; 2) Concrete loading: After the trolley is fully loaded with concrete, start the mixer and move it to one end of the rail; or move the empty trolley to one end of the rail and then pump the concrete into the trolley's concrete hopper, and then start the mixer (mixing rate is 15 r / min). 3) Pouring Construction: Rotate the gear knob to speed 1. At this time, the trolley speed range is 0-5km / h. Rotate the speed control handle to make the trolley reach the speed required for pouring (speed is 1-2km / h). Press the cruise button and release the speed control handle to make the trolley travel at a constant speed when the cruise button is pressed. When the trolley travels to one end of the set train maintenance pit template, shake the adjustment handle to lower the guide plate and adjust its hinge angle with the straight diversion section to control the concrete discharge volume and discharge angle to meet the pouring requirements. When the discharge angle is 45°, the discharge volume is about 2.5m³ / h. When the discharge angle is 60°, the discharge volume is about 3m³ / h. When it is necessary to fine-tune the discharge position, it can be achieved by adjusting the discharge angle. For the problem of the discharge speed change caused by changing the discharge angle, the overall pouring rate can be kept constant by adjusting the vehicle speed. For the change of the discharge port position caused by changing the discharge angle, it can be adjusted by adjusting the eye extension plate on the lower surface of the inclined guide plate. 4) Adding concrete: After the concrete in the trolley compartment is poured, turn the rotary gear knob to speed 2. The trolley will move forward or backward at maximum speed off the rails, refill with concrete, and then return to the pouring site. Alternatively, the trolley can be stopped in place by using the braking assembly, and concrete can be pumped in remotely before resuming pouring operation. If the trolley leaves the rails to add concrete, another trolley can take over the pouring work to improve the pouring progress. 5) Completion of pouring: After the train maintenance pit is poured, the trolley is driven off the rails and the trolley is transferred by adjusting the steering wheel assembly; then the poured structure is cured according to the corresponding concrete curing requirements, and the construction is completed.

[0018] The beneficial effects of this invention are as follows: 1) This trolley is designed for integrated pouring and mixing, mixing concrete simultaneously during transportation and pouring; it is also flexibly applicable to the construction scenario of pouring concrete in train maintenance pits, and uses electric operation to replace manual pushing, saving a lot of physical strength and improving construction efficiency; at the same time, the trolley's wheels are designed to be close to the rail and equipped with a vehicle speed control system and a material discharge control system, which can effectively control the pouring speed and angle to ensure the pouring quality. 2) The trolley has a simple structure and extremely low operating cost. It can effectively replace the pumping method of conveying concrete, solve the problem of inconvenient pump speed adjustment, and compared with the pumping method, it can save technicians' monitoring work to a certain extent, reduce the requirements for construction monitoring equipment, greatly save costs, and improve construction quality. It has good practical value and promotion prospects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the concrete pouring trolley structure used for the construction of train maintenance pits according to the present invention. Figure 2 This is a schematic diagram of the traveling section of the concrete pouring trolley used for the construction of the train maintenance pit according to the present invention. Figure 3 This is a schematic diagram of the concrete pouring section of the concrete pouring trolley used for the construction of train maintenance pits according to the present invention. Figure 4 This is a schematic diagram of the concrete pouring trolley mixing device for the construction of train maintenance pits according to the present invention. Figure 5 This is a schematic diagram of the concrete pouring trolley pad structure used for the construction of the train maintenance pit according to the present invention. Figure 6 This is a schematic diagram of the concrete pouring trolley discharge control system for the construction of train maintenance pits according to the present invention. Figure 7 This is a schematic diagram of the concrete pouring trolley guide channel structure used for the construction of train maintenance pits according to the present invention. Figure 8This is a schematic diagram of the extension plate structure of the concrete pouring trolley used for the construction of the train maintenance pit according to the present invention. Figure 9 This is a schematic diagram of the control head structure of the concrete pouring trolley used for the construction of train maintenance pits according to the present invention. Figure 10 This is a schematic diagram of the structure of the concrete pouring trolley brake assembly for the construction of the train maintenance pit according to the present invention. Figure 11 This is a schematic diagram of the scenario in which the trolley of the present invention is used to pour concrete for the side wall of a train maintenance pit; Figure 12 This is a scene diagram of the trolley used in this invention for pouring concrete for the side wall of a train maintenance pit; Figure 13 The trolley of this invention is used in the construction of the side wall of the train maintenance pit.

[0020] In the diagram: A. Train control section; B. Casting section; C. Rails; D. Train maintenance pit; 1. Chassis; 2. Wheel assembly; 21. Wheel; 22. Bearing sleeve; 23. Axle; 3. Driving control system; 31. Driving motor; 32. Controller; 33. Battery; 34. Control handle; 341. Speed ​​control handle; 342. Gear knob; 343. Cruise control button; 35. Brake assembly; 351. Brake disc; 352. Disc brake; 353. Brake lever; 354. Brake button; 4. Concrete silo; 41. Silo bottom plate; 42. Concrete silo outlet; 5. Mixing device; 51. Mixing column; 52. Mixing limb; 53. Mixing blade 54. Stirring switch; 6. Discharge control system; 61. Guide channel; 611. Straight diversion section; 612. Inclined diversion section; 62. Traction assembly; 621. Gear box; 6211. Main gear box; 6212. Secondary gear box; 622. Adjusting crossbar; 623. Adjusting handle; 624. Traction rope; 625. Adjusting vertical rod; 7. Guide plate; 71. Leak-proof slurry soft plate; 72. Leak-proof sealing ring; 73. Traction hole; 74. Extension plate; 8. Trolley discharge port; 9. Pad layer; 10. Steering wheel assembly; 101. Support rod; 102. Universal wheel. Detailed Implementation

[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are merely preferred embodiments of the present invention, and not all embodiments, nor are they intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications or equivalent variations based on the disclosed technical content. However, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention's technical solution shall still fall within the protection scope of the present invention's technical solution.

[0022] Example 1 This embodiment describes a concrete pouring trolley used for constructing train maintenance pits, such as... Figures 1 to 10 As shown, the system includes a traveling section A and a pouring section B. The traveling section A includes a chassis 1, wheel assemblies 2 mounted on the chassis 1, and a traveling control system 3. The pouring section B includes a concrete silo 4, which is located on the chassis 1. The silo is equipped with a mixing device 5, and a discharge control system 6 is located at the bottom of the silo. The wheel assembly 2 includes at least four wheels 21 arranged in pairs opposite each other. These wheels 21 are track-aligned wheels, allowing the trolley to run on the rail C. The traveling control system 3 is used to control the trolley's speed and movement. The discharge control system 6 is used to adjust the concrete discharge angle and the concrete discharge volume. During construction, the discharge control system 6 works in conjunction with the traveling control system 3 to control the pouring speed of the concrete in the train maintenance pit D, thereby ensuring the pouring quality. Furthermore, because the trolley travels along the rail, it remains straight with the track slab during the pouring process, saving on measurement equipment costs and ensuring that the geometric dimensions and positional accuracy of the sidewalls meet design requirements.

[0023] The concrete pouring trolley for train maintenance pit construction described in this embodiment has a chassis 1 preferably of steel frame structure. The wheel assembly 2 further includes at least four bearing sleeves 22 fixedly arranged in pairs under the chassis 1, preferably welded to the four corners of the bottom surface of the chassis 1, with wheel axles 23 corresponding to the bearing sleeves 22. The track-adhering wheels 21 are installed at both ends of the wheel axles 23. One end of the trolley chassis 1 may also preferably be provided with a steering wheel assembly 10, which includes two universal wheels 102 connected to the lower part of one end of the trolley chassis 1 by a support rod 101. The support rod 101 is an adjusting screw. During the pouring construction phase, the universal wheels 102 are raised by adjusting the support rod 101, allowing the trolley to travel along the track. During the non-pouring construction phase, the universal wheels 102 are lowered by adjusting the support rod 101, which is used to adjust the steering when the trolley is moved on the ground.

[0024] The concrete pouring trolley used for train maintenance pit construction described in this embodiment includes a driving control system 3 comprising a driving motor 31, a controller 32, a battery 33, a control knob 34, and a brake assembly 35. The driving motor 31, controller 32, and battery 33 are all mounted under the chassis 1. The driving motor 31 drives the wheels 21 to travel along the rail, and the controller 32 controls the driving status. The control knob 34 is mounted on the chassis 1 and includes a speed control handle 341, a gear selector knob 342, and a cruise control button 343. The speed control handle 341 is equivalent to an electric vehicle speed control handle 341, used to adjust the speed at any gear. The cruise control button 343 controls the trolley to cruise at a specified speed. The braking assembly 35 is used to slow down or stop the vehicle. It includes a brake disc 351, a disc brake 352, a brake lever 353, and a brake button 354 mounted on the control handle 34. The brake disc 351 is mounted on the axle 23 and close to the wheel 21. When the brake lever 353 is pulled, the disc brake 352 clamps the brake disc 351. At the same time, the brake lever 353 can press the brake button 354 to disconnect the battery 33, stop the drive motor 31, and slow down the vehicle. The drive motor, battery, controller, speed control lever, gear knob, and brake button are connected in series. The specific connection method can refer to the speed control method of existing electric vehicles, which will not be described in detail here.

[0025] In a preferred embodiment, the concrete pouring trolley for the aforementioned train maintenance pit construction has a gear selector knob 342 with a 0-speed gear, a 1-speed gear, a 2-speed gear, and a reverse gear. In the 0-speed gear, the trolley is off. In the 1-speed gear, the trolley's maximum permissible speed meets the requirements for concrete pouring in the train maintenance pit D. In the 2-speed gear, the trolley reaches its maximum speed. In the reverse gear, the trolley travels backward. In any gear, the speed can be adjusted via the speed control handle 341, and the trolley can maintain a constant speed at the speed indicated by pressing the cruise control button 343 and releasing the speed control handle 341, similar to the "cruise control" function in a car. The specific circuitry and control structure will not be detailed here. When traveling at a constant speed, rotating the speed control handle 341, rotating the gear selector knob 342, and engaging the brake handle 353 can all interrupt the constant speed travel.

[0026] The concrete pouring trolley used for train maintenance pit construction described in this embodiment has a concrete silo 4 with its discharge port located on the silo bottom plate 41. The discharge control system 6 includes a guide channel 61 surrounding the concrete silo discharge port 42, and a traction assembly 62 for controlling the opening and closing of the guide channel 61 and adjusting the guide angle. The guide channel 61 includes a straight guide section 611 and an inclined guide section 612. The straight guide section 611 is sleeve-shaped, with its upper end tightly attached to the bottom of the concrete silo 4 and surrounding the concrete silo discharge port 42, for... Concrete is successfully discharged from the container; the inclined diversion section 612 is connected to the lower port of the straight diversion section 611, and includes a straight wall extending from the straight diversion section 611 and a guide plate 7 hinged to one side of the lower port of the straight diversion section 611; a trolley discharge port 8 is provided on the side opposite to the guide plate 7, and the guide plate 7 is used to change the flow direction of the concrete, so that it flows out toward the trolley discharge port 8; the traction assembly 62 is used to pull and adjust the guide plate 7 to move closer to or away from the lower port of the straight diversion section 611, so as to control the discharge amount of concrete and adjust the discharge angle.

[0027] Furthermore, the area of ​​the guide plate 7 is not less than the area of ​​the concrete silo outlet 42; a leak-proof soft plate 71, preferably made of rubber or carbon fiber, is affixed to the joint where it is hinged to the straight flow section 611; two leak-proof sealing rings 72, preferably made of silicone, are provided on the two sides adjacent to the hinge side, which make the guide plate 7 make interference contact with the straight wall of the straight flow section 611 to prevent leakage during flow; a traction hole 73 is provided on the side away from the hinge side; an extension plate 74 is also attached to the back of the guide plate 7, the extension plate 74 having the same width as the guide plate, which can be pushed forward from the back of the guide plate 7 to adjust the position of concrete pouring. The length of the extension plate 74 can be set as needed, and its material can be wood, steel plate or other materials. The attachment method can be simple binding with thin rope, or connection can be achieved by setting matching snap-fit ​​slides and sliders on the contact surface of the back of the guide plate 7 and the extension plate 74.

[0028] When fine-tuning of the material feeding position is required, it can be achieved by adjusting the discharge angle. For the problem of changes in the discharge speed caused by changing the discharge angle, the overall pouring rate can be kept constant by adjusting the vehicle speed. The material feeding angle, mixing rate and vehicle speed are linked to control the material feeding speed. For the change in the discharge port position caused by changing the discharge angle, it can be solved by using an extension plate.

[0029] The traction assembly 62 includes an adjusting crossbar 622 connected to the output shaft of the gearbox 621, an adjusting handle 623 connected to the input shaft of the gearbox 621, and a traction rope 624. The adjusting crossbar 622 is positioned higher than the lower end of the straight diversion section 611. One end of the traction rope 624 passes through the traction hole 73 of the guide plate 7, and the other end is fixed to the adjusting crossbar 622. By shaking the adjusting handle 623 to rotate the gear inside the gearbox 621, the adjusting crossbar 622 is rotated around the axis to wind up or unwind the traction rope 624, thereby adjusting the hinge angle between the guide plate 7 and the straight diversion section 611, thus adjusting the concrete discharge rate and discharge angle or stopping the discharge.

[0030] To facilitate simultaneous pouring of concrete for the train maintenance pit, the concrete pouring trolley used in this embodiment has two concrete silo outlets 42, symmetrically positioned on the side of the silo bottom plate 42 near the wheel 21. The bottom plate 42 of the concrete silo 4 is symmetrically inclined towards the concrete silo outlets 42 to ensure smooth concrete flow. Two gear boxes 621 are respectively located on the upper side of the trolley outlet 8. Furthermore, to simultaneously control the discharge volume and angle of the two outlets, in this embodiment, both gear boxes 621 are 45-degree orthogonal gear boxes 621, one being the main gear box 6211 and the other the auxiliary gear box 6212. One output shaft of the main gear box 6211 is connected to the input shaft of the auxiliary gear box 6212 via an adjusting rod 625. By cranking the adjusting handle 623 on the main gear box 6211, the discharge volume and angle of the two trolley outlets 8 can be adjusted simultaneously. It should be noted that, in other embodiments where simultaneous pouring of the inspection pits on both sides is not required, only one trolley discharge port may be provided, or the traction adjustment components of the two trolley discharge ports may not be linked.

[0031] The concrete pouring trolley used for the construction of the train maintenance pit described in this embodiment includes a mixing device 5 comprising a mixing column 51 installed on the bottom plate 42 of the concrete silo 4, a mixing motor built into the mixing column 51, a mixing arm 52 sleeved on the mixing column 51, and a mixing blade 53 installed on the mixing arm 52. The mixing motor is connected to a battery 33 on the trolley chassis 1, and a mixing switch 54 is provided on the control faucet 34 to switch the mixing motor to drive the mixing arm 52 and the mixing blade 53 to rotate around the mixing column 51, thereby mixing the concrete and preventing sedimentation and solidification during transportation and pouring.

[0032] In addition, in this embodiment, the concrete pouring trolley used for the construction of the train maintenance pit has a pad 9 between the concrete silo 4 and the trolley chassis 1. This pad 9 is a frame structure welded from square steel, used to provide space for the installation of the discharge control system 6 under the concrete silo 4. Specifically, the pad 9 is divided into an upper pad and a lower pad. The lower pad can be composed of three vertical long strip steel pipes and four short strip steel pipes placed on the left and right sides. The upper pad can be composed of eight horizontal long strip steel pipes. The concrete silo is placed on the upper pad, and the guide channel is placed between the upper and lower pads. Between steel pipes No. 4 and No. 5 of the upper pad, a horizontal adjusting rod is installed on both the left and right sides. The same end of the two horizontal adjusting rods is connected to the vertical adjusting rod through an orthogonal gear steering box.

[0033] Example 2 This embodiment uses the trolley described in Embodiment 1 to perform concrete pouring construction on a train maintenance pit. Figures 11 to 13 As shown, the specific operation process is as follows: 1) Preparation: Set up the formwork for the train maintenance pit D to be poured, and prepare the concrete material for pouring; 2) Concrete loading: After the trolley is filled with concrete, start the mixer at a speed of 15 r / min and transfer it to one end of rail C; or transfer the empty trolley to one end of rail C and then pump the concrete into the concrete hopper 4 of the trolley before starting the mixer. 3) Pouring construction: Rotate the gear knob 342 to the 1st speed gear. In this gear, the speed range of the trolley is 0-5km / h. Rotate the speed control handle 341 to make the trolley reach the speed required for pouring, which is about 1.5km / h. Press the cruise button 343 and release the speed control handle 341 to make the trolley travel at a constant speed at the speed when the cruise button 343 is pressed. When the trolley reaches one end of the prepared train maintenance pit D formwork, crank the adjusting handle 623 to lower the guide plate 7 and adjust its hinge angle with the straight diversion section 611 to control the concrete discharge rate and discharge angle to meet the pouring requirements. The angle and discharge rate are controlled as follows: For the casting of column-type maintenance pits and the hidden column section in wall-type maintenance pits, the discharge angle is controlled at 45° and the discharge rate is controlled at approximately 2.5 m³ / h. In the section between each hidden column in the cast-in-place wall-type maintenance pit, the discharge angle is controlled at 60°, and the discharge rate is controlled at approximately 3m³ / h. 4) Adding concrete: After the concrete in the trolley compartment is poured, turn the gear knob 342 to the 2nd speed. The trolley will move forward or backward at maximum speed off the rail C, reload the concrete, and then enter the pouring site. Alternatively, the trolley can be stopped in place by using the brake assembly 35, and concrete can be pumped in remotely before resuming the pouring operation. If the trolley moves off the rail C to add concrete, another trolley can take over the pouring work to improve the pouring progress. 5) Completion of pouring: After the train maintenance pit D is poured, the trolley is driven off the rail C and the trolley is transferred by adjusting the steering wheel assembly 10; then the poured structure is cured according to the corresponding concrete curing requirements, and the construction is completed.

[0034] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and not restrictive in all respects. Furthermore, it should be understood that although this specification describes embodiments, it does not encompass only one technical solution. This descriptive method is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A concrete pouring trolley for constructing train maintenance pits, characterized in that: It includes the traveling section (A) and the casting section (B); The vehicle unit (A) includes a chassis (1), a wheel assembly (2) mounted on the chassis (1), and a vehicle control system (3). The pouring section (B) includes a concrete silo (4), which is set on a chassis (1), and is equipped with a mixing device (5) inside the silo and a discharge control system (6) at the bottom of the silo. The wheel assembly (2) includes at least four wheels (21) arranged in pairs opposite each other. These wheels (21) are track-mounted wheels (21) that enable the trolley to run on the rail (C). The driving control system (3) is used to control the speed and movement of the vehicle; The discharge control system (6) is used to adjust the concrete discharge angle and the concrete discharge amount; During construction, the concrete pouring speed of the train maintenance pit (D) is controlled by the material discharge control system (6) in conjunction with the train operation control system (3). The vehicle control system (3) includes a vehicle motor (31), a controller (32), a battery (33), a control knob (34), and a brake assembly (35). The vehicle motor (31), controller (32) and battery (33) are all installed under the chassis (1) and connected in series. The vehicle motor (31) is used to drive the wheels (21) to travel along the rail, and the controller (32) is used to control the driving status. The control knob (34) is mounted on the chassis (1), and is equipped with a speed control handle (341), a gear knob (342) and a cruise button (343). The speed control handle (341) is used to adjust the speed at any gear. The cruise button (343) is used to control the car to cruise at a specified speed at a constant speed; The brake assembly (35) is used to slow down the car or stop the car from running. It includes a brake disc (351) and a disc brake (352), as well as a brake lever (353) and a brake button (354) provided on the control auger (34). The brake disc (351) is mounted on the axle (23) and close to the wheel (21). When the brake lever (353) is pulled, the control disc brake (352) clamps the brake disc (351). At the same time, the brake lever (353) can press the brake button (354) to disconnect the battery (33), stop the drive motor (31) and slow down the car. The discharge port of the concrete silo (4) is located on the bottom plate (41) of the silo. The discharge control system (6) includes a guide channel (61) surrounding the discharge port (42) of the concrete silo, and a traction component (62) for controlling the opening and closing of the guide channel (61) and adjusting the guide angle. The guide channel (61) includes a straight guide section (611) and an inclined guide section (612). The direct flow section (611) is sleeve-shaped, with its upper end closely attached to the bottom of the concrete silo (4) and surrounding the concrete silo outlet (42) for smooth concrete discharge. The inclined diversion section (612) is connected to the lower port of the straight diversion section (611), and includes a straight wall extending from the straight diversion section (611) and a guide plate (7) hinged to one side of the lower port of the straight diversion section (611); a trolley discharge port (8) is provided on the side opposite to the guide plate (7), and the guide plate (7) is used to change the flow direction of the concrete and make it flow out toward the trolley discharge port (8); The traction component (62) is used to pull the adjusting guide plate (7) closer to or further away from the lower port of the direct diversion section (611) to control the discharge amount of concrete and adjust the discharge angle.

2. The concrete pouring trolley for train maintenance pit construction according to claim 1, characterized in that: The wheel assembly (2) also includes at least four bearing sleeves (22) which are fixedly arranged in pairs under the chassis (1), and at least two axles (23) are arranged corresponding to the bearing sleeves (22). The track-attached wheels (21) are installed at both ends of the axles (23).

3. The concrete pouring trolley for train maintenance pit construction according to claim 1, characterized in that: The gear selector knob (342) is equipped with a 0-speed gear, a 1-speed gear, a 2-speed gear, and a reverse gear; When in 0-speed gear, the car is powered off. When in first speed gear, the maximum permissible speed of the trolley is sufficient to meet the speed requirements for concrete pouring in the train maintenance pit (D). When in 2nd gear, the car can reach its maximum speed; When in reverse gear, the car travels backwards. In any gear, the speed can be adjusted by the speed control handle (341), and the speed control handle (341) can be released by pressing the cruise button (343) so that the car can travel at a constant speed when the cruise button (343) is pressed. When in a constant speed driving state, rotating the speed control handle (341), rotating the gear knob (342), and pulling the brake handle (353) can all interrupt the constant speed driving state.

4. The concrete pouring trolley for train maintenance pit construction according to claim 1, characterized in that: The area of ​​the guide plate (7) is not less than the area of ​​the concrete silo outlet (42); a leak-proof soft plate (71) is attached to the joint where it is hinged to the straight diversion section (611), and a leak-proof sealing ring (72) is wrapped on the two sides adjacent to the hinge side, and a traction hole (73) is provided on the side away from the hinge side. An extension plate (74) is attached to the back of the guide plate (7), the extension plate (74) having the same width as the guide plate, and can be pushed forward from the back of the guide plate (7) to adjust the position of the concrete pouring. The traction assembly (62) includes an adjusting crossbar (622) disposed in a gearbox (621) and connected to the output shaft of the gearbox (621), an adjusting handle (623) connected to the input shaft of the gearbox (621), and a traction rope (624). The position of the adjusting crossbar (622) is higher than the lower port of the straight drainage section (611). One end of the traction rope (624) passes through the traction hole (73) of the guide plate (7), and the other end is fixed on the adjusting crossbar (622). By shaking the adjustment handle (623) to rotate the gear in the gearbox (621), the adjustment bar (622) is rotated around the axis to wind up or unwind the traction rope (624), and the hinge angle between the guide plate (7) and the straight diversion section (611) is adjusted to adjust the discharge amount and discharge angle of the concrete or stop the discharge.

5. The concrete pouring trolley for train maintenance pit construction according to claim 4, characterized in that: There are two concrete silo outlets (42), which are symmetrically arranged on the side of the silo bottom plate (41) near the wheel (21); and the silo bottom plate (41) of the concrete silo (4) is symmetrically inclined towards the concrete silo outlet (42) so that the concrete can flow out smoothly from the outlet. There are two gear boxes (621), which are respectively located on the upper side of the trolley discharge port (8); Both gearboxes (621) are 45-degree orthogonal gearboxes (621), one of which is the main gearbox (6211) and the other is the auxiliary gearbox (6212). One output shaft of the main gearbox (6211) is connected to the input shaft of the auxiliary gearbox (6212) via an adjusting rod (625). By shaking the adjusting handle (623) on the main gearbox (6211), the discharge amount and discharge angle of the two trolley discharge ports (8) are adjusted simultaneously.

6. The concrete pouring trolley for train maintenance pit construction according to claim 1, characterized in that: A pad (9) is provided between the concrete silo (4) and the trolley chassis (1). The pad (9) is a frame structure welded from square steel, which is used to provide space for the installation of the discharge control system (6) under the concrete silo (4). The chassis (1) of the vehicle is also provided with a steering wheel assembly (10) at one end. The steering wheel assembly (10) includes two casters (102) connected to the bottom of one end of the chassis (1) by a support rod (101). The support rod (101) is an adjusting screw. During the pouring construction, the caster wheel (102) is raised by adjusting the support rod (101), and the trolley travels along the track; In the non-casting construction state, the caster wheel (102) is lowered by adjusting the support rod (101) to adjust the steering when the trolley is moved on the ground.

7. The concrete pouring trolley for train maintenance pit construction according to claim 1, characterized in that: The mixing device (5) includes a mixing column (51) installed on the bottom plate (41) of the concrete silo (4), a mixing motor built into the mixing column (51), a mixing arm (52) sleeved on the mixing column (51), and a mixing blade (53) installed on the mixing arm (52). The mixing motor is connected to the battery (33) on the chassis (1) of the trolley, and a mixing switch (54) is provided on the control faucet (34) to switch the mixing motor to drive the mixing limb (52) and mixing blade (53) to rotate around the mixing column (51) to mix concrete.

8. A method for constructing a train maintenance pit, characterized in that: Concrete pouring is performed using the trolley described in any one of claims 1-7; specifically, the following steps are included: 1) Preparation: Set up the formwork for the train maintenance pit (D) to be poured, and prepare the concrete material for pouring; 2) Concrete loading: After the trolley is filled with concrete, start the mixer and transfer it to one end of the rail (C); or transfer the empty trolley to one end of the rail (C) and then pump the concrete into the trolley's concrete hopper (4) and start the mixer. 3) Pouring construction: Rotate the gear knob (342) to the 1st speed gear, rotate the speed control handle (341) to make the trolley reach the speed required for pouring, press the cruise button (343) and release the speed control handle (341) so that the trolley can travel at a constant speed when the cruise button (343) is pressed; when the trolley travels to one end of the set train maintenance pit (D) template, shake the adjustment handle (623) to lower the guide plate (7) and adjust its hinge angle with the straight diversion section (611) to control the concrete discharge amount and discharge angle to meet the pouring requirements; 4) Add concrete: After the concrete in the trolley compartment is poured, turn the gear knob (342) to the 2nd speed. The trolley will move forward or backward at the maximum speed and exit the rail (C). After refilling the concrete, it will enter the pouring site again. Alternatively, the trolley can be stopped in place by the braking assembly (35), and concrete can be pumped in remotely to restart the pouring operation. If the trolley leaves the rail (C) to add concrete, another trolley can take over the pouring work to improve the pouring progress. 5) End of pouring: After the train maintenance pit (D) is poured, the trolley is driven off the rail (C) and the trolley is transferred by adjusting the steering wheel assembly (10); then the poured structure is cured according to the corresponding concrete curing requirements, and the construction is completed.

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