Precast concrete slab paving truck for temporary road surface in underground coal mines

Abstract

The present invention provides a paving and transporting vehicle for temporary concrete precast slabs in underground coal mine lanes, belonging to the technical field of underground coal mine handling equipment. The vehicle comprises a front frame, a power mechanism, front wheels, a cab, a rear frame, rear wheels, and a gantry loading and unloading mechanism. The power mechanism, front wheels, and cab are all mounted on the front frame, and a control system is provided in the cab. The rear frame is connected to the front frame via vertical pins. The rear wheels and gantry loading and unloading mechanism are mounted on the rear frame. The gantry loading and unloading mechanism comprises a boom, a rotary reducer, a transmission tube, a load-bearing frame, a support sleeve, a barrel-type slide rail, a lead screw, a nut-type lifting ring, a lifting chain, a hydraulic motor, and a gantry oil cylinder. The paving and transporting vehicle enables efficient transportation, laying, and recovery of precast concrete slabs in underground coal mine lanes.

Description

Technical Field

[0001] The invention belongs to the technical field of underground coal mine transportation equipment, and particularly discloses a paving and transportation vehicle for prefabricated concrete slabs for temporary road surfaces of underground coal mine tunnels. Background Art

[0002] In recent years, large underground coal mines have widely adopted explosion-proof rubber-wheeled vehicles for transporting personnel, materials, and equipment. To facilitate safe and efficient vehicle operation, underground roadways must be hardened with concrete, with a thickness of approximately 0.2 to 0.3 meters. Compared to conventional pavement hardening, underground pavement hardening is labor-intensive, has low production efficiency, and requires a long maintenance cycle. With the exception of pit parking lots and auxiliary transport tunnels, the pavement in many tunnels only serves productive transportation within certain working faces, resulting in a short service life and significant resource waste. Currently, some advanced mines have used recyclable precast concrete slabs for trial paving of temporary roadway pavements. While the pavement strength meets vehicle traffic requirements, transporting and hoisting the precast concrete slabs within the narrow and long underground tunnels is extremely difficult due to a lack of specialized equipment.

[0003] Recyclable precast concrete slab pavements are widely used in surface areas and large-section highway tunnels. Due to the vast construction sites, they are typically transported by truck, with equipment such as truck-mounted cranes or forklifts performing the lifting, laying, and recycling, resulting in high construction efficiency. CN 109667609 A discloses a precast concrete slab paving and transport vehicle with a rotating tower and retractable boom. The vehicle is suitable for construction in large-section tunnels and general surface areas. However, due to the small cross-sectional dimensions of underground coal mine roadways, the space for tower rotation and boom extension is limited, making it unsuitable for use in underground coal mine roadways.

[0004] In order to solve the problem that precast concrete slabs are difficult to transport, lay and recycle safely and efficiently in underground coal mine tunnels, a precast concrete slab laying and transporting vehicle for temporary pavement in underground coal mine tunnels was developed. Summary of the Invention

[0005] The purpose of this invention is to address the current status and shortcomings of the background technology and, based on the actual needs of existing coal mine underground roadway pavement hardening, design a temporary coal mine underground roadway concrete precast slab paving and transportation vehicle to achieve efficient transportation, laying and recycling of concrete precast slabs in coal mine underground roadways.

[0006] To achieve the above-mentioned purpose, the present invention provides a coal mine underground tunnel temporary pavement concrete precast slab paving and transporting vehicle, comprising a front frame, a power mechanism, front wheels, a cab, a rear frame, rear wheels and a gantry loading and unloading mechanism; the power mechanism, front wheels and cab are all arranged on the front frame, and a control system is arranged in the cab; the rear frame is connected to the front frame through a vertical pin; the rear wheels and the gantry loading and unloading mechanism are arranged on the rear frame; the gantry loading and unloading mechanism comprises a boom, a rotary reducer, a transmission pipe, a load-bearing frame, a support sleeve, a barrel slide rail, a lead screw, a nut-type lifting ring, a lifting chain, a hydraulic motor and a gantry oil cylinder; the boom is located on both sides of the rear frame, and the bottom is connected to the tail of the rear frame through a lower horizontal pin; the rotary reducer is fixed to the tail of the rear frame, and is located on both sides The control system controls the side arms; the two ends of the transmission pipe are fixedly connected to the arm and the slewing reducer respectively; the load-bearing frame includes a side beam, the bottom of the side beam is connected to the top of the arm on both sides through an upper horizontal pin, and a mounting hole is provided on the top; the support sleeve is fixed in the mounting hole; the two ends of the barrel slide are fixedly sleeved outside the support sleeves on both sides; the two ends of the lead screw are rotatably inserted in the support sleeves on both sides; the nut part of the nut-type lifting ring is threadedly sleeved on the lead screw, and the lifting ring part extends from the slot on the barrel slide; the lifting chain is installed on the lifting ring part; the hydraulic motor is installed on the mounting hole and connected to the end of the lead screw, and the hydraulic motor is controlled by the control system to drive the lead screw to rotate; the two ends of the gantry cylinder are connected to the arm and the side beam respectively through horizontal pins and are controlled by the control system.

[0007] Furthermore, the load-bearing frame is a portal frame, the side beams are connected by a top beam, and the top beam is located above the tubular slide rail.

[0008] Furthermore, the hydraulic motor is connected to the lead screw via a spline sleeve.

[0009] Furthermore, the above-mentioned coal mine underground tunnel temporary road surface precast concrete slab paving and transportation vehicle also includes a horizontal pushing mechanism for pushing the precast concrete slabs in the rear frame forward and backward.

[0010] Furthermore, the push mechanism includes a slide, a guide wheel and a push cylinder; the slide is placed horizontally in the rear frame; the guide wheel is installed at the bottom of the slide and rolls along the wheel groove set in the rear frame; the two ends of the push cylinder are respectively connected to the rear frame and the slide through horizontal pins.

[0011] Furthermore, the above-mentioned coal mine underground tunnel temporary pavement precast concrete slab paving and transportation vehicle also includes an outrigger oil cylinder arranged at the tail end of the rear frame; the outrigger oil cylinder is controlled by a control system.

[0012] Furthermore, the power mechanism is a diesel engine.

[0013] Furthermore, a steering wheel is provided in the middle of the cab, and seats are provided on the front and rear sides of the cab.

[0014] Furthermore, steering cylinders are provided on both sides of the vertical pin; both ends of the steering cylinders are connected to the front frame and the rear frame respectively through side vertical pins, and the steering cylinders are controlled by a control system.

[0015] Compared with the prior art, the present invention has the following beneficial effects.

[0016] The coal mine underground tunnel temporary pavement precast concrete slab paving and transporting vehicle provided by the present invention integrates the loading, transportation, laying and recycling of precast concrete slabs. The precast concrete slabs are placed in the rear frame, and the front wheels on the front frame are driven to rotate by the power mechanism to drive the rear frame to move. When laying or recycling the precast concrete slabs, the paving and transporting vehicle stops moving, and the rotary reducer is started to drive the horizontal pin below the arm to swing as the center of the circle. The gantry cylinder is extended and retracted to drive the horizontal pin above the load-bearing frame to swing as the center of the circle, thereby realizing the vertical lifting of the lifting chain. The hydraulic motor is started to drive the screw to rotate. Under the restriction of the barrel slide rail, the nut-type lifting ring moves along the screw, thereby realizing the horizontal movement of the lifting chain. Through the horizontal and vertical movement of the lifting chain, the precast concrete slabs are laid on the tunnel or stacked in the rear frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A front view of a precast concrete slab paving and transporting vehicle for a temporary road surface in an underground coal mine provided in an embodiment;

[0019] Figure 2 for Figure 1 A top view of the paving vehicle shown;

[0020] Figure 3 for Figure 1 A left side view of the paving vehicle shown;

[0021] Figure 4 for Figure 1 An oblique view of the paving vehicle shown;

[0022] Figure 5 for Figure 1 A schematic diagram of the cab in the paving vehicle shown;

[0023] Figure 6 for Figure 1 The schematic diagram of the installation of the door-type loading and unloading mechanism in the paving vehicle shown;

[0024] Figure 7 for Figure 1 The schematic diagram of the installation of the horizontal push mechanism in the paving vehicle shown;

[0025] Figure 8 for Figure 1 The schematic diagram of the structure of the rear frame of the paving and transporting vehicle shown;

[0026] Figure 9 for Figure 1 The structural diagram of the load-bearing frame in the paving and transporting vehicle shown;

[0027] Figure 10 for Figure 2 Enlarged view of part A;

[0028] Figure 11 for Figure 7 Magnified view of part B.

[0029] In the figure: 1-front frame; 2-front wheel; 3-cab; 3.1-steering wheel; 3.2-seat; 4-rear frame; 4.1-wheel groove; 5-rear wheel; 6-gantry loading and unloading mechanism; 6.1-big arm; 6.2-rotary reducer; 6.3-transmission pipe; 6.4-load-bearing frame; 6.5-support sleeve; 6.6-cylinder slide rail; 6.7-screw; 6.8-nut-type lifting ring; 6.9-lifting chain; 6.10-hydraulic motor; 6.11-gantry cylinder; 6.12-mounting hole; 6.13-spline sleeve; 7-vertical pin; 8-lower horizontal pin; 9-upper horizontal pin; 10.1-slide; 10.2-guide wheel; 10.3-push cylinder; 11-outrigger cylinder; 12-diesel engine; 13-steering cylinder. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] The present embodiment provides a coal mine underground tunnel temporary road surface concrete precast slab paving and transporting vehicle, comprising a front frame 1, a power mechanism, front wheels 2, a cab 3, a rear frame 4, rear wheels 5 and a door-type loading and unloading mechanism 6; the power mechanism, front wheels 2 and cab 3 are all arranged on the front frame 1, and a control system is arranged in the cab 3; the rear frame 4 is connected to the front frame 1 through a vertical pin 7; the rear wheels 5 and the door-type loading and unloading mechanism 6 are arranged on the rear frame 4; the door-type loading and unloading mechanism 6 includes The boom 6.1, slewing reducer 6.2, transmission tube 6.3, load-bearing frame 6.4, support sleeve 6.5, barrel slide 6.6, lead screw 6.7, nut-type lifting ring 6.8, lifting chain 6.9, hydraulic motor 6.10 and mast cylinder 6.11; the boom 6.1 is located on both sides of the rear frame 4, and the bottom is connected to the rear end of the rear frame 4 through the lower horizontal pin 8; the slewing reducer 6.2 is fixed to the rear end of the rear frame 4, located between the two sides of the boom 6.1, Controlled by the control system; the two ends of the transmission tube 6.3 are fixedly connected to the boom 6.1 and the rotary reducer 6.2 respectively; the load-bearing frame 6.4 includes a side beam, the bottom of the side beam is connected to the top of the boom 6.1 on both sides through an upper horizontal pin 9, and a mounting hole 6.12 is provided on the top; the support sleeve 6.5 is fixed in the mounting hole 6.12; the two ends of the cylindrical slide rail 6.6 are fixedly sleeved outside the support sleeves 6.5 on both sides; the two ends of the lead screw 6.7 are rotatably inserted into the support sleeves 6.5 on both sides; the nut part of the nut-type lifting ring 6.8 is threadedly sleeved on the lead screw 6.7, and the lifting ring part extends from the slot on the cylindrical slide rail 6.6; the lifting chain 6.9 is installed on the lifting ring part; the hydraulic motor 6.10 is installed on the mounting hole and connected to the end of the lead screw 6.7. The hydraulic motor 6.10 is controlled by the control system to drive the lead screw to rotate; the two ends of the gantry cylinder 6.11 are connected to the boom 6.1 and the side beam respectively through horizontal pins and controlled by the control system.

[0032] The above-mentioned coal mine underground tunnel temporary pavement precast concrete slab paving vehicle integrates the loading, transportation, laying and recycling of concrete precast slabs. The concrete precast slabs are placed in the rear frame 4, and the front wheel 2 on the front frame 1 is driven to rotate by the power mechanism, driving the rear frame 4 to move. When laying or recycling the concrete precast slabs, the paving vehicle stops moving, the rotary reducer 6.2 is started, driving the horizontal pin 8 below the boom 6.1 to swing as the center of the circle, the gantry cylinder 6.11 is extended and retracted, driving the horizontal pin 9 above the load-bearing frame 6.4 to swing as the center of the circle, thereby realizing the vertical lifting of the lifting chain 6.9, the hydraulic motor 6.10 is started to drive the screw 6.7 to rotate, and under the restriction of the barrel slide rail 6.6, the nut-type lifting ring 6.8 moves along the screw 6.7, thereby realizing the horizontal movement of the lifting chain 6.9, and the concrete precast slabs fixed on the lifting chain 6.9 are laid on the tunnel or stacked in the rear frame 4.

[0033] Furthermore, the load-bearing frame 6.4 is a portal frame, and the side beams are connected by a top beam, and the top beam is located above the cylindrical slide rail 6.6 to protect the cylindrical slide rail 6.6.

[0034] Furthermore, the hydraulic motor 6.10 is connected to the lead screw 6.7 via a spline sleeve 6.13.

[0035] Furthermore, both ends of the transmission pipe 6.3 are fixedly connected to the boom 6.1 and the rotary reducer 6.2 through flanges respectively.

[0036] Furthermore, the above-mentioned coal mine underground tunnel temporary road surface precast concrete slab paving and transportation vehicle also includes a horizontal pushing mechanism for pushing the precast concrete slabs in the rear frame 4 forward and backward.

[0037] Furthermore, the push mechanism includes a slide 10.1, a guide wheel 10.2 and a push cylinder 10.3; the slide 10.1 is placed horizontally in the rear frame 4; the guide wheel 10.2 is installed at the bottom of the slide 10.1 and rolls along the wheel groove 4.1 set in the rear frame 4; the two ends of the push cylinder 10.3 are respectively connected to the rear frame 4 and the slide 10.1 through horizontal pins, and the push cylinder 10.3 is controlled by the control system.

[0038] Furthermore, the above-mentioned coal mine underground tunnel temporary roadway concrete precast slab paving vehicle further includes an outrigger cylinder 11 disposed at the rear of the rear frame 4; the outrigger cylinder 11 is controlled by a control system. When the vehicle is parked, the outrigger cylinder 11 rests on the paved road surface, reducing vehicle shaking and improving vehicle stability.

[0039] Furthermore, the power mechanism is a diesel engine 12 .

[0040] Furthermore, a steering wheel 3.1 is provided in the middle of the cab 3, and seats 3.2 are provided on the front and rear sides of the cab 3.

[0041] Furthermore, steering cylinders 13 are provided on either side of the vertical pins. The ends of the steering cylinders 13 are connected to the front frame 1 and rear frame 4, respectively, via side vertical pins. The steering cylinders 13 are controlled by a control system. Steering of the rear frame 4 is achieved by controlling the extension length of the pistons in the steering cylinders 13 on both sides.

[0042] The control system in this embodiment is a conventional technical means in the related field and will not be described in detail here.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A coal mine underground tunnel temporary roadway concrete prefabricated slab paving and transporting vehicle, characterized in that: It includes front frame, power mechanism, front wheels, cab, rear frame, rear wheels and door-type loading and unloading mechanism; The power mechanism, front wheels and cab are all arranged on the front frame, and a control system is arranged in the cab; The rear frame is connected to the front frame via a vertical pin; The rear wheels and the door-type loading and unloading mechanism are arranged on the rear frame; The gantry loading and unloading mechanism includes a large arm, a rotary reducer, a transmission pipe, a load-bearing frame, a support sleeve, a barrel slide rail, a lead screw, a nut-type lifting ring, a lifting chain, a hydraulic motor and a gantry oil cylinder; The big arms are located on both sides of the rear frame, and the bottom is connected to the tail of the rear frame through a lower horizontal pin; The slewing reducer is fixed to the tail of the rear frame, located between the two side arms, and is controlled by the control system; The two ends of the transmission pipe are fixedly connected to the big arm and the rotary reducer respectively; The load-bearing frame includes a side beam, the bottom of which is connected to the top of the two side arms through an upper horizontal pin, and a mounting hole is provided on the top; The support sleeve is fixed in the mounting hole; The fixing sleeves at both ends of the barrel slide are arranged outside the supporting sleeves on both sides; The two ends of the lead screw are rotatably inserted into the support sleeves on both sides; The nut portion of the nut-type lifting ring is threadedly sleeved on the lead screw, and the lifting ring portion extends from the slot on the barrel-type slide rail; The hanging chain is installed on the hanging ring part; The hydraulic motor is installed on the mounting hole and connected to the end of the lead screw. The hydraulic motor is controlled by the control system to drive the lead screw to rotate. The two ends of the mast oil cylinder are connected to the boom and side beam respectively through horizontal pins and are controlled by a control system; The coal mine underground tunnel temporary roadway concrete precast slab paving and transporting vehicle further includes a horizontal pushing mechanism for pushing the concrete precast slab in the rear frame forward and backward; The horizontal push mechanism includes a slide, a guide wheel and a horizontal push cylinder; The slide is placed flat inside the rear frame; The guide wheel is mounted on the bottom of the carriage and rolls along the wheel groove provided in the rear frame; The two ends of the push cylinder are connected to the rear frame and the slide respectively through horizontal pins; The precast concrete panels are placed in the rear frame, and the front wheels on the front frame are driven to rotate by the power mechanism, driving the rear frame to move. When laying or recovering the precast concrete panels, the paving and transporting vehicle stops moving, and the rotary reducer starts, driving the horizontal pin below the boom to swing as the center of the circle. The gantry oil cylinder extends and retracts, driving the horizontal pin above the load-bearing frame to swing as the center of the circle, thereby realizing the vertical lifting of the lifting chain. The hydraulic motor starts to drive the screw to rotate. Under the restriction of the barrel slide rail, the nut-type lifting ring moves along the screw, thereby realizing the horizontal movement of the lifting chain. Through the horizontal and vertical movement of the lifting chain, the precast concrete panels are laid on the roadway or stacked in the rear frame; The load-bearing frame is a portal frame, and the side beams are connected by a top beam, which is located above the barrel slide rail; The hydraulic motor is connected to the lead screw via a spline sleeve.

2. The coal mine underground tunnel temporary pavement precast concrete slab paving and transporting vehicle according to claim 1, characterized in that: It also includes an outrigger oil cylinder arranged at the tail end of the rear frame; The outrigger oil cylinder is controlled by a control system.

3. The coal mine underground tunnel temporary pavement precast concrete slab paving and transporting vehicle according to claim 1, characterized in that: The power mechanism is a diesel engine.

4. The coal mine underground tunnel temporary pavement precast concrete slab paving and transporting vehicle according to claim 1, characterized in that: A steering wheel is arranged in the middle of the cab, and seats are arranged on the front and rear sides of the cab.

5. The coal mine underground tunnel temporary pavement precast concrete slab paving and transporting vehicle according to claim 1, characterized in that: Steering cylinders are provided on both sides of the vertical pin; The two ends of the steering cylinder are respectively connected to the front frame and the rear frame through side vertical pins, and the steering cylinder is controlled by a control system.

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