Gob-side entry retaining self-moving concrete pump

Abstract

The utility model relates to the technical field of mine gob-side entry retaining equipment, in particular to a gob-side entry retaining self-moving concrete pump which comprises a crawler chassis, two sets of crawler frames are arranged on the two sides of the crawler chassis respectively, and two sets of driving wheels driven by crawler motors are arranged on the two sets of crawler frames respectively. The pumping assembly is connected above the crawler chassis, and the pumping assembly is provided with a liftable hopper at the tail part of the crawler chassis; the hydraulic assembly comprises a hydraulic oil tank, an explosion-proof motor and a hydraulic pump set which is driven by the explosion-proof motor to provide power for action parts; according to the device, the function of automatic walking or automatic pumping control can be achieved by remotely sending an instruction through the remote control transmitter, the reliability of underground walking and operation is guaranteed through cooperation of the radar, the camera, the distance measuring instrument and the like, the height position of the lifting type hopper can be adjusted, and the device is convenient to use. And the discharge port can be in butt joint with various devices, so that the universality is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of mine goaf retention equipment, and in particular to a self-moving concrete pump for goaf retention. Background Technology

[0002] To improve coal recovery rates and roadway maintenance, the state actively promotes pillarless mining. The pillarless roadway support method, known as gob-side retention, offers numerous technical and economic advantages. Currently, the main support structure for gob-side retention is flexible formwork pumped concrete support. Concrete is pumped into pre-fixed fiber-reinforced flexible formwork on the roadway sidewalls. Reinforcing bars are installed at the top and bottom of the flexible formwork, making the supporting concrete an integral part of the roadway roof and floor, sharing the roadway pressure. However, most concrete pumps currently available on the market are towed structures. Due to their large size, relocation requires a support vehicle, necessitating multi-departmental collaboration and lengthy preparation time. Furthermore, the start-up, stopping, mixing, and pumping operations of existing concrete pumps are mostly manually controlled, resulting in low levels of automation. It is understood that during the implementation of flexible formwork gob-side retention projects, concrete pumps typically need to be moved every 10-15 days. Such frequent repetitive labor significantly reduces production efficiency, and the large workload and personnel required often exceed the maximum number of workers per shift, posing a significant safety hazard.

[0003] Chinese invention patent application CN114941538 discloses an intelligent concrete pump for coal mines, including a walking mechanism with a frame mounted on it. A support mechanism is located at the lower end of the frame, and a drive mechanism, a pumping mechanism, a mixing mechanism, a first valve, a second valve, a third valve, and a fourth valve are located on the upper side of the frame. The feed inlet of the pumping mechanism is connected to the discharge outlet of the mixing mechanism. A remote control controls the walking mechanism via the first valve, the support mechanism via the second valve, the mixing mechanism via the third valve, and the pumping mechanism via the fourth valve. The above-disclosed solution enables continuous pumping, self-movement, and remote control operation. This application discloses a different technical solution, making the equipment self-moving and pumping safer and more reliable. Utility Model Content

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, this utility model provides a self-moving concrete pump for leaving a roadway along the goaf.

[0005] Technical solution: To achieve the above objectives, this utility model discloses a self-propelled concrete pump for roadway retention along the goaf, comprising:

[0006] A tracked chassis, wherein a set of track frames is provided on each side of the tracked chassis, and a set of drive wheels driven by a track motor is provided on each of the two sets of track frames;

[0007] A pumping assembly is connected above the tracked chassis, and the pumping assembly has a liftable hopper at the rear of the tracked chassis;

[0008] A hydraulic assembly, comprising a hydraulic tank, an explosion-proof motor, and a hydraulic pump assembly driven by the explosion-proof motor to provide power to the moving parts;

[0009] And control components that enable remote control of self-propelled movement and pumping.

[0010] Preferably, a set of outrigger cylinders is provided on each of the left and right sides of the bottom of the tracked chassis, and a reducer is also provided on the drive wheel.

[0011] Preferably, the pumping assembly further includes a water tank communicating with the hopper, and a set of bearings is provided on each of the left and right sides of the water tank, with the bearing seats outside the bearings fixed on the track chassis.

[0012] Preferably, a set of fixed seats is provided on each side of the hopper, the fixed seats are connected to one end of the lifting cylinder through a first pin, the other end of the lifting cylinder is connected to the track chassis through a second pin, and a displacement sensor is provided inside the lifting cylinder.

[0013] Preferably, the hydraulic pump assembly includes a plunger pump connected to the explosion-proof motor and a triple gear pump connected in series with the plunger pump, and the explosion-proof motor is electrically connected to the bottom power supply via a cable on a cable reel.

[0014] Preferably, the hydraulic assembly is further provided with a radiator on the return oil line before the hydraulic oil tank.

[0015] Preferably, the control components include a camera, a laser rangefinder, a radar, an encoder located on the drive wheel, and a remote control transmitter for sending commands. The camera is located on the upper part of the front and rear ends of the vehicle body, the laser rangefinder is located on the lower part of the front end of the vehicle body, and the radar includes a lidar located on the top of the vehicle body and millimeter-wave radars located on both sides of the vehicle body and near the center.

[0016] The beneficial effects of this utility model are:

[0017] 1. This device can achieve automatic walking or automatic pumping by remotely sending commands through a remote control transmitter. The whole vehicle uses an explosion-proof motor as a power source to improve the safety of underground operations and achieve zero exhaust emissions. The reliability of underground walking and operation is ensured by the cooperation of radar, camera, rangefinder, etc. The height of the lifting hopper is adjustable, and its discharge port can be connected to various equipment, making it more versatile.

[0018] 2. Tracked chassis structures have greater traction and are characterized by strong adaptability, good passability, strong load-bearing capacity, and good durability in underground mining operations. At the same time, the elasticity of the tracks can effectively reduce the impact of vibration and shock on the machinery, which helps to extend the service life of the equipment. Attached Figure Description

[0019] Figure 1 This is a front view of the overall structure of this utility model;

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

[0021] Figure 3 This is a perspective view of the track frame in this utility model;

[0022] Figure 4 This is a perspective view of the pumping component in this utility model;

[0023] Figure 5 Appendix to this utility model Figure 4 A magnified view of a portion of region A in the middle;

[0024] Figure 6 Appendix to this utility model Figure 2 A magnified view of a portion of region B in the middle;

[0025] Figure 7 This is a schematic diagram of the control principle of the control component in this utility model.

[0026] In the diagram, 1. Tracked chassis; 101. Track frame; 102. Drive wheel; 103. Track motor; 104. Reducer; 2. Pumping assembly; 201. Hopper; 202. Water tank; 203. Bearing; 204. Bearing housing; 205. Fixed base; 206. First pin; 207. Lifting cylinder; 208. Second pin; 3. Hydraulic assembly; 301. Hydraulic oil tank; 302. Explosion-proof motor; 303. Hydraulic pump set; 304. Piston pump; 305. Triple gear pump; 4. Camera; 5. Outrigger cylinder; 6. Cable reel; 7. Laser rangefinder; 8. Radar; 9. Encoder; 10. Millimeter-wave radar; 11. LiDAR; 12. Radiator. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0028] A self-propelled concrete pump with a goaf-keeping feature, such as... Figure 1 — Figure 2As shown, it includes a tracked chassis 1, a pumping assembly 2, a hydraulic assembly 3, and a control assembly for remote control of self-propelled movement and pumping.

[0029] like Figure 3 As shown, each side of the tracked chassis 1 is provided with a set of track frames 101. The track frames 101 on the left and right sides are welded to the frame of the tracked chassis 1. Each of the two sets of track frames 101 is provided with a set of drive wheels 102 driven by a track motor 103. In addition, the track frames 101 are also equipped with track rollers, tracks, track chains, guide wheels and tension spring devices that are well known to those skilled in the art, which will not be described in detail here. In order to improve the traction of the tracked chassis, a reducer 104 is also provided on the drive wheel 102. The track motor 103 drives the reducer 104 to achieve speed reduction and torque increase, so that a greater traction force is applied to the drive wheel 102. The tracked chassis 1 has the characteristics of strong adaptability, good passability, strong load-bearing capacity and good durability in mines. At the same time, the elasticity of the tracks can effectively reduce the impact of vibration and impact on the machinery, which helps to extend the service life of the equipment. To facilitate the maintenance of the tracks, a set of outrigger cylinders 5 are provided on each of the left and right sides of the bottom of the track chassis 1. The track chassis 1 can be lifted by raising the outrigger cylinders 5, making it convenient to replace the tracks.

[0030] like Figure 4 — Figure 5 As shown, the pumping assembly 2 is connected above the tracked chassis 1. The pumping assembly 2 has a liftable hopper 201 at the rear of the tracked chassis 1. Each side of the hopper 201 has a set of fixed seats 205. The fixed seats 205 are connected to one end of a lifting cylinder 207 via a first pin 206. The other end of the lifting cylinder 207 is connected to the tracked chassis 1 via a second pin 208. A displacement sensor is installed inside the lifting cylinder 207 to precisely control the extension and retraction length of the cylinder rod, thereby accurately controlling the height of the hopper 201. The pumping assembly 2 also includes a water tank 202 connected to the hopper 201. Each side of the water tank 202 has a set of bearings 203. The bearing seats 204 outside the bearings 203 are fixed to the tracked chassis 1. When the cylinder rod of the lifting cylinder 207 extends and retracts, the hopper 201 can shift its angle around the center of the bearing 203, achieving position adjustment in the height direction. This allows the outlet of the hopper 201 to better connect with other equipment, broadening its applicability.

[0031] like Figure 6As shown, the hydraulic assembly 3 includes a hydraulic oil tank 301, an explosion-proof motor 302, and a hydraulic pump assembly 303 driven by the explosion-proof motor 302 to provide power to the moving parts. To prevent the hydraulic oil temperature from becoming too high when returning to the hydraulic oil tank 301, the hydraulic assembly 3 is also equipped with a motor-driven radiator 12 on the return oil pipeline before the hydraulic oil tank 301. The hydraulic pump assembly 303 includes a plunger pump 304 connected to the explosion-proof motor 302 and a triple gear pump 305 connected in series with the plunger pump 304. The explosion-proof motor 302 is electrically connected to the bottom power supply via a cable on the cable reel 6. The explosion-proof motor 302 serves as the power source to drive the hydraulic pump assembly 303. The plunger pump 304 of the hydraulic pump assembly 303 is controlled by a solenoid valve to switch between self-propelled and pumping modes. The triple gear pump 305 controls the actions of the cable reel 6, hopper 201, outrigger cylinder 5, stirring and lubrication motor, etc. The hydraulic oil in the hydraulic system is cooled by the radiator 12 and finally returns to the hydraulic oil tank 301.

[0032] like Figure 7 As shown, the control components include a camera 4, a laser rangefinder 7, a radar 8, an encoder 9 located on the drive wheel 102, and a remote control transmitter for sending commands. It also includes control boxes, starters, base station power supplies, and communication base stations well known in the art. To ensure the safety of the device when it is moving on its own, the camera 4 is located on the upper part of the front and rear of the vehicle body, the laser rangefinder 7 is located on the lower part of the front of the vehicle body, and the radar 8 includes a laser radar 11 located on the top of the vehicle body and millimeter-wave radars 10 located on both sides of the vehicle body and near the middle.

[0033] The working principle of this device is as follows: A remote transmitter sends commands for self-propelled movement or pumping, activating the explosion-proof motor 302. The plunger pump 304 of the hydraulic pump unit 303 switches between self-propelled movement and automatic pumping control via a solenoid valve. This device enables one-button start, fault self-diagnosis, and emergency stop via the remote transmitter. Simultaneously, it intelligently regulates the pumping speed, achieving stepless speed adjustment and improving pumping quality. It also automatically adjusts the discharge height of the hopper 201 for better integration with other equipment. Components such as the camera 4, laser rangefinder 7, radar 8, and encoder 9 installed on the device provide real-time monitoring and feedback on the device's operating status, increasing the safety of equipment operation and personnel.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-advancing concrete pump for gob-side entry retaining, characterized in that: Comprising a crawler chassis (1) provided with a set of crawler frames (101) on each side, a set of drive wheels (102) driven by crawler motors (103) on each set of crawler frames (101); a pumping assembly (2) connected above the crawler chassis (1), the pumping assembly (2) being provided with a liftable hopper (201) at the tail of the crawler chassis (1); a hydraulic assembly (3) including a hydraulic oil tank (301), an explosion-proof motor (302), and a hydraulic pump group (303) driven by the explosion-proof motor (302) to provide power for moving parts; and a control assembly for realizing remote control self-walking and pumping.

2. The self-advancing concrete pump for gob-side entry retaining of claim 1, wherein: The crawler chassis (1) is provided with a set of supporting leg oil cylinders (5) on the bottom of each side, and a speed reducer (104) is further provided on the drive wheel (102).

3. The self-advancing concrete pump for gob-side entry retaining of claim 1, wherein: The pumping assembly (2) further includes a water tank (202) in communication with the hopper (201), and a set of bearings (203) are provided on each side of the water tank (202), and the bearing seat (204) outside the bearing (203) is fixedly arranged on the crawler chassis (1).

4. The gob- side entry retaining self-advancing concrete pump of claim 3, wherein: A set of fixing seats (205) are arranged on each side of the hopper (201), the fixing seat (205) is connected with one end of the lifting oil cylinder (207) through the first pin shaft (206), the other end of the lifting oil cylinder (207) is connected with the crawler chassis (1) through the second pin shaft (208), and the displacement sensor is arranged in the lifting oil cylinder (207).

5. The gob- side entry retaining self- advancing concrete pump of claim 1, wherein: The hydraulic pump group (303) includes a plunger pump (304) coupled with the explosion-proof motor (302) and a three-gear pump (305) connected in series with the plunger pump (304), and the explosion-proof motor (302) is electrically connected with the downhole power supply through the cable on the cable drum (6).

6. The gob- side entry retaining self- advancing concrete pump of claim 1, wherein: The hydraulic assembly (3) is further provided with a radiator (12) on the oil return pipeline in front of the hydraulic oil tank (301).

7. The gob- side entry retaining self- advancing concrete pump of claim 1, wherein: The control assembly includes a camera (4), a laser range finder (7), a radar (8), an encoder (9) located on the drive wheel (102), and a remote control transmitter for sending instructions, the camera (4) is located on the upper part of the front end and the rear end of the vehicle body respectively, the laser range finder (7) is located on the lower part of the front end of the vehicle body, and the radar (8) includes a laser radar (11) located on the top of the vehicle body and a millimeter wave radar (10) located on both sides of the vehicle body and close to the middle part.

Images