Four-arm drill carriage for coal mine

Abstract

The utility model provides a four-arm drill carriage for a coal mine, and belongs to the technical field of roadway supporting machinery. The machine is composed of a machine body part, a lifting part, a front drill arm part, an onboard jumbolter, a front support, a rear drill arm part, a sliding stair assembly, a guard plate part, a control part, an electrical system and a hydraulic system. The machine body part is installed below the lifting part, the front drill arm parts are installed on the left side and the right side of the lifting part in a bilateral symmetry mode, the onboard anchor rod drilling machines are installed at the front ends of the front drill arm parts respectively, the front supports are installed at the front end of the lifting part, the rear drill arm part is installed in the middle of the machine body part, and the protection plate part is installed on the rear side of the upper portion of the machine body part. The control part is placed below the front end of the guard plate part and fixed to the machine body part, the front end of the sliding stair assembly is fixed to the rear side above the front drill arm part, the rear end of the sliding stair assembly is fixed to the upper portion of the guard plate part, the electrical system is installed below the guard plate part, and the hydraulic system is installed at the rear end of the guard plate part. The utility model has the advantages that the anchor protection operation and the supporting efficiency are high, and the construction requirements of different roadway heights are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of roadway support machinery, and particularly relates to a four-arm drilling jumbo for coal mines. Background Art

[0002] In recent years, the demand for intelligent and automated tunneling equipment has become more urgent. Bolt support is a fast, safe, and economical roadway support method, which is the representative of the advanced technology of current roadway support and the development direction of coal mine roadway support technology. However, at present, most of the two-arm bolt drilling jumbos are used for the support of roof bolts and the support of high-position rib bolts; the low-position rib bolts are lagged and constructed manually using pneumatic bolt drilling rigs; this support process has high support efficiency and the labor organization is not overly concentrated under the condition of ensuring the front and rear support row spacing, and it maximally exerts the cooperation ability of people, equipment, and time. However, the operation of manually lagging and drilling low-position rib bolt holes is not only cumbersome, with a large operation intensity, but also has a low safety factor. Content of the Utility Model

[0003] The purpose of the utility model is to provide a four-arm drilling jumbo for coal mines to solve the problems such as the cumbersome process, large operation intensity, and low safety factor in the operation of manually lagging and drilling low-position rib bolt holes.

[0004] To solve the above technical problems, the technical solution adopted by the utility model is as follows:

[0005] A four-arm drilling jumbo for coal mines is composed of a body part, a lifting part, a front drilling arm part, an on-board bolt drilling rig, a front support, a rear drilling arm part, a sliding staircase assembly, a guard plate part, an operation part, an electrical system, and a hydraulic system;

[0006] The body part is installed below the lifting part. There are two sets of front drilling arm parts, which are symmetrically installed on the left and right sides of the lifting part. There are two on-board bolt drilling rigs, which are respectively installed at the front ends of the front drilling arm parts. The front support is installed at the front end of the lifting part. The rear drilling arm part is installed at the middle position of the body part. The guard plate part is installed at the upper rear position of the body part. The operation part is placed below the front end of the guard plate part and fixed on the body part. The front end of the sliding staircase assembly is fixed at the upper rear position of the front drilling arm part, and its rear end is fixed above the guard plate part. The electrical system is installed below the guard plate part, and the hydraulic system is installed at the rear end position of the guard plate part.

[0007] A further preferred solution is that the body part is composed of a shovel plate, a shovel plate oil cylinder, a shovel plate oil cylinder seat, a front connecting cross beam, a platform, a traveling assembly, a rear connecting cross beam, a drill pipe box, a switch fixing bracket, a water pressure reducing valve, and a double-circuit electric control box; one end of the shovel plate is hinged to the bottom of the front connecting cross beam, one end of the shovel plate oil cylinder seat is installed in the front mounting hole of the front connecting cross beam, there are two shovel plate oil cylinders, which are arranged symmetrically left and right, one end of the cylinder body of the shovel plate oil cylinder is hinged to the shovel plate oil cylinder seat, one end of the telescopic rod of the shovel plate oil cylinder is hinged to the connecting ear on the shovel plate, when the telescopic rod of the shovel plate oil cylinder extends, it drives the shovel plate to press down on the roadway floor, when the telescopic rod of the shovel plate oil cylinder retracts, it drives the shovel plate to lift upwards, the upper surface of the front connecting cross beam is connected to the front part of the bottom surface of the platform, the rear connecting cross beam is connected to the rear part of the bottom surface of the platform, the platform is installed on the front connecting cross beam and the rear connecting cross beam, there is a set of traveling assemblies, which are respectively installed on the left and right sides of the front connecting cross beam and the rear connecting cross beam, the drill pipe box is fixed on the corresponding mounting hole in the middle of the platform for placing spare drill pipes, the switch fixing bracket is installed at the lower right corner position on the platform, the water pressure reducing valve is fixed on the middle rear side panel of the switch fixing bracket, and the double-circuit electric control box is installed on the switch fixing bracket for facilitating the start and stop of the electrical system.

[0008] A further preferred solution is that the lifting part is composed of a rear lifting oil cylinder seat, a rear lifting oil cylinder, a lifting platform, a four-bar linkage mechanism, a front stabilizing mechanism, a front lifting oil cylinder top seat, a front lifting oil cylinder base, a front lifting oil cylinder, a swing oil cylinder I, a swing oil cylinder seat, a support oil cylinder seat, and a flap; there are four rear lifting oil cylinder seats, which are arranged in two groups symmetrically left and right, and their bottom ends are fixedly connected to the corresponding mounting holes in the middle of the platform, one end of the cylinder body of the rear lifting oil cylinder is hinged to the rear lifting oil cylinder seat, one end of the telescopic rod of the rear lifting oil cylinder is hinged to the rotary fixing seat of the front drill arm part, the bottom of the four-bar linkage mechanism is fixed to the platform, and its top end is hinged to the connecting ear of the lifting platform, there are two groups of front stabilizing mechanisms, which are arranged symmetrically left and right, their bottoms are fixed to the platform, and their top ends are hinged to the connecting ear in the middle of the bottom surface of the lifting platform, the front lifting oil cylinder top seat is fixed above the lifting platform, there are two front lifting oil cylinder bases, which are symmetrically installed on the platform left and right, one end of the cylinder body of the front lifting oil cylinder is hinged to the front lifting oil cylinder base, one end of the telescopic rod of the front lifting oil cylinder is hinged to the front lifting oil cylinder top seat, the telescopic rods of the rear lifting oil cylinder and the front lifting oil cylinder extend and retract, driving the four-bar linkage mechanism, the front stabilizing mechanism and the lifting platform to move up and down, meeting the requirements of mechanical drilling construction at different heights, there are two swing oil cylinder seats, which are arranged symmetrically left and right, the swing oil cylinder seats are fixed at the bottom surface position of the lifting platform, there are two swing oil cylinders I, which are arranged symmetrically left and right, the cylinder body of the swing oil cylinder I is fixedly connected to the swing oil cylinder seat, there are two flaps, which are arranged symmetrically left and right, the flaps are connected to the rotating shaft of the swing oil cylinder I, and the rotation of the rotating shaft of the swing oil cylinder I drives the flaps to move, realizing the actions of the flaps turning outwards and retracting inwards, and adjusting the flap position in real time according to different working positions of the front drill arm part, the support oil cylinder seat is installed at the front end of the lifting platform to provide support for the support oil cylinder for front support.

[0009] A further preferred solution is that the front support is composed of a limit pin, a support outer sleeve, a support telescopic oil cylinder, a support inner sleeve, a support support oil cylinder, a support telescopic seat, a spring assembly, a top support telescopic oil cylinder, a top support inner sleeve, a support top beam, a side support top beam, and a support adjustment oil cylinder; the connecting block in the middle of the support outer sleeve is hinged to the front end of the lifting platform. The limit pin is of an inserted structure and is installed at the hinge joint between the rear connecting ear of the support outer sleeve and the connecting ear of the lifting platform. There are two support support oil cylinders, which are arranged symmetrically left and right. One end of the cylinder body of the support support oil cylinder is hinged to the support oil cylinder seat, and one end of the telescopic rod of the support support oil cylinder is hinged to the connecting block on the outside of the support outer sleeve. One end of the cylinder body of the support telescopic oil cylinder is hinged to the connecting block inside the support outer sleeve, and one end of the telescopic rod of the support telescopic oil cylinder is hinged to the connecting block inside the support inner sleeve. The support inner sleeve is nested inside the support outer sleeve. The support telescopic seat is of a front and rear sleeve structure and is hinged to the top of the support inner sleeve. There are two spring assemblies, which are arranged symmetrically left and right. One end of its connecting sleeve is fixed to the left and right sides of the bottom of the support telescopic seat, and one end of its positioning pin is fixed to the left and right sides of the top of the support inner sleeve. Its function is to enable the support top beam to make front-back and left-right adjustments within a certain angle. There are two top support inner sleeves, and one end of their square tubes is installed inside the square tube of the support telescopic seat respectively. There are two top support telescopic oil cylinders, and one is installed in each of the two top support inner sleeves. One end of the cylinder body of the top support telescopic oil cylinder is hinged to the connecting block inside the support telescopic seat, and one end of the telescopic rod of the top support telescopic oil cylinder is hinged to the connecting block inside the top support inner sleeve. There are three support top beams, two of which are hinged in the card slots at the top of the top support inner sleeves, and the other one is hinged in the card slot at the top of the support telescopic seat. There are cylindrical protrusions on it to facilitate the positioning of the anchor net. There are two side support top beams, which are arranged symmetrically left and right and are fixedly connected to the connecting block at the top of the top support inner sleeve. There are two support adjustment oil cylinders. One end of the cylinder body of the support adjustment oil cylinder is hinged to the connecting block below the top support inner sleeve, and one end of the telescopic rod of the support adjustment oil cylinder is hinged to the connecting block below the side support top beam.

[0010] A further preferred solution is that the rear drill arm part is composed of a rear drill arm connecting seat, a left rear drill, and a right rear drill; the rear drill arm connecting seat is installed above the rear of the platform of the machine body part, and the left rear drill and the right rear drill are symmetrically arranged on the rear drill arm connecting seat.

[0011] A further preferred solution is that the left rear drill consists of a slewing cylinder, a rear drill arm slewing base, a swing rod, a swing rod support cylinder, a swing cylinder II, a swing cylinder shield, a swing cylinder plate, and a rear-mounted rock bolt drill; the bottom of the rear drill arm slewing base is coaxially and fixedly installed with a connecting block in the middle of the rear drill arm connecting seat, one end of the cylinder body of the slewing cylinder is fixed on the connecting block on the side of the rear drill arm connecting seat, the telescopic rod of the slewing cylinder is hinged to the connecting ear below the rear drill arm slewing base, the square cylinder arc end of the swing rod is hinged to the connecting block in the middle of the rear drill arm slewing base, a swing cylinder II is installed on the surface of the other end of the swing rod, one end of the cylinder body of the swing rod support cylinder is hinged to the connecting block at the top of the rear drill arm slewing base, one end of the telescopic rod of the swing rod support cylinder is hinged to the connecting block at the top of the swing rod, the swing cylinder plate is fixedly connected to the outer side surface of the swing cylinder II, another swing cylinder II is installed above the swing cylinder plate, and the side is connected to the rear-mounted rock bolt drill. There are two swing cylinder shields, which are respectively fixed above the two swing cylinder IIs; the rear drill arm part adopts a cantilever slewing structure. The slewing cylinder drives the rear-mounted rock bolt drill to swing left and right. At the same time, the swing rod support cylinder drives the rear-mounted rock bolt drill to lift up and down to adjust the height, and the two swing cylinder IIs rotate to drive the rear-mounted rock bolt drill to rotate left and right to adjust the angle, so as to carry out the low-side rock bolt operation.

[0012] A further preferred solution is that the sliding staircase assembly consists of a connecting shield, a connecting seat, a sliding tread, a sliding seat, a guide wheel, and a guardrail; the connecting shield is fixed above the front drill arm part. There are two connecting seats, which are respectively fixed on the corresponding mounting holes above the connecting shield. The sliding seat is installed above the guard plate part. The connecting block at the front end of the sliding tread is hinged to the two connecting seats. There are two guide wheels, which are respectively fixed at the connecting blocks at the tail end of the sliding tread. The guide wheels on both sides are placed in the card slots inside the sliding seat. When the lifting part rises, it drives the front end of the sliding tread to lift, and its tail end slides forward along the card slot inside the sliding seat through the guide wheel, so that the sliding tread forms a slope. On the contrary, when the lifting part descends, the sliding tread will be flattened. There are two guardrails, which are symmetrically fixed on both sides of the sliding tread.

[0013] A further preferred solution is that the control part consists of a left control, a right control, a slideway, an inner sliding frame, and a sliding cylinder; the slideway is fixed in the middle of the platform. There are two inner sliding frames, which are symmetrically installed on the slideway left and right. The left and right sides of the inner sliding frame are placed in the long slots on both sides of the slideway, so that the slideway can guide the inner sliding frame. The left control and the right control are respectively installed at the corresponding mounting holes on the inner sliding frame. There are two sliding cylinders, which are arranged symmetrically left and right. One end of the cylinder body of the sliding cylinder is hinged to the connecting ear in the middle of the slideway, and one end of the telescopic rod of the sliding cylinder is hinged to the connecting ear inside the inner sliding frame. Under the action of the sliding cylinder, the left control and the right control can be driven to extend and retract to the left and right sides respectively.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] First, the jumbo is equipped with four sets of drill arm mechanisms. The front drill arm can rotate at different positions and angles, enabling all-round construction operations for roof, high-level sidewall, bolt, cable bolt, heading blast hole, and detection hole. The rear drill arm adopts a cantilever rotary structure for constructing low-level sidewall bolt holes. The front and rear drill arms cooperate to complete full-section bolt support, with high anchor support efficiency.

[0016] Second, the four groups of drill arms and drilling propulsion mechanisms of the jumbo are all controlled by a hydraulic system, and the four groups of drill arms and drilling propulsion mechanisms can operate independently and simultaneously, with high support efficiency.

[0017] Third, the front drill arm of the jumbo is provided with a liftable working platform, and the two drill arms can be lifted up and down with the working platform to meet the construction requirements of different roadway heights and facilitate the operation of the operators.

[0018] Fourth, the front drill arm of the jumbo is provided with a pedal device that can be flipped, extended, and heightened to meet the construction requirements of different roadway widths and facilitate the operation of the operators.

[0019] Fifth, the whole machine adopts solenoid valves plus remote control, enabling remote control.

[0020] Sixth, the jumbo is equipped with two sets of hydraulic pump stations, which respectively control the front drill arm and the rear drill arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a four-arm jumbo for coal mines of the utility model;

[0022] Figure 2 is Figure 1 a schematic structural diagram of the body part in

[0023] Figure 3 is Figure 1 a schematic structural diagram of the lifting part in

[0024] Figure 4 is Figure 3 a top view of the lifting part in

[0025] Figure 5 is Figure 1 a schematic structural diagram of the front support in

[0026] Figure 6 is Figure 5 a schematic top view structure diagram of the front support in

[0027] Figure 7 is Figure 1 a left view of the rear drill arm part in

[0028] Figure 8 is Figure 7 Schematic diagram of the structure of the left-rear drill in the middle

[0029] Figure 9 is Figure 1 Schematic diagram of the structure of the sliding staircase assembly in the middle

[0030] Figure 10 is Figure 1 Schematic diagram of the structure of the control part in the middle

[0031] Figure 11 is Figure 10 Top view of the control part in the middle Specific implementation manner

[0032] As Figure 1 shown, a four-arm drill rig for coal mines described in this embodiment is composed of a machine body part 1, a lifting part 2, a front drill arm part 3, an on-board anchor drill 4, a front support 5, a rear drill arm part 6, a sliding staircase assembly 7, a guard plate part 8, a control part 9, an electrical system 10 and a hydraulic system 11;

[0033] The machine body part 1 is installed below the lifting part 2. There are two sets of the front drill arm parts 3, which are symmetrically installed on the left and right sides of the lifting part 2. There are two on-board anchor drills 4, which are respectively installed at the front ends of the front drill arm parts 3. The front support 5 is installed at the front end of the lifting part 2. The rear drill arm part 6 is installed at the middle position of the machine body part 1. The guard plate part 8 is installed at the upper rear position of the machine body part 1. The control part 9 is placed below the front end of the guard plate part 8 and fixed on the machine body part 1. The front end of the sliding staircase assembly 7 is fixed at the upper rear position above the front drill arm part 3, and its rear end is fixed above the guard plate part 8. The electrical system 10 is installed below the guard plate part 8, and the hydraulic system 11 is installed at the rear end position of the guard plate part 8.

[0034] As Figure 2As shown in the figure, the body part 1 is composed of a shovel plate 1-1, a shovel plate oil cylinder 1-2, a shovel plate oil cylinder seat 1-3, a front connecting cross beam 1-4, a platform 1-5, a traveling assembly 1-6, a rear connecting cross beam 1-7, a drill pipe box 1-8, a switch fixing bracket 1-9, a water pressure reducing valve 1-10, and a double-circuit electric control box 1-11; one end of the shovel plate 1-1 is hinged to the bottom of the front connecting cross beam 1-4, one end of the shovel plate oil cylinder seat 1-3 is installed in the front mounting hole of the front connecting cross beam 1-4, there are two shovel plate oil cylinders 1-2, which are arranged symmetrically left and right. One end of the cylinder body of the shovel plate oil cylinder 1-2 is hinged to the shovel plate oil cylinder seat 1-3, and one end of the telescopic rod of the shovel plate oil cylinder 1-2 is hinged to the connecting ear on the shovel plate. When the telescopic rod of the shovel plate oil cylinder 1-2 extends, it drives the shovel plate 1-1 to press down tightly on the roadway floor. When the telescopic rod of the shovel plate oil cylinder 1-2 retracts, it drives the shovel plate 1-1 to lift upward. The upper surface of the front connecting cross beam 1-4 is connected to the front part of the bottom surface of the platform 1-5, and the rear connecting cross beam 1-7 is connected to the rear part of the bottom surface of the platform 1-5. The platform 1-5 is installed on the upper surfaces of the front connecting cross beam 1-4 and the rear connecting cross beam 1-7. There is a set of traveling assemblies 1-6, which are respectively installed on the left and right sides of the front connecting cross beam 1-4 and the rear connecting cross beam 1-7. The drill pipe box 1-8 is fixed on the corresponding mounting hole in the middle of the platform 1-5 to facilitate the placement of spare drill pipes. The switch fixing bracket 1-9 is installed at the lower right corner position on the platform 1-5. The water pressure reducing valve 1-10 is fixed on the middle rear side panel of the switch fixing bracket 1-9. The double-circuit electric control box 1-11 is installed on the switch fixing bracket 1-9 to facilitate the start and stop of the electrical system 10.

[0035] As Figure 3 , Figure 4As shown in the figure, the lifting part 2 is composed of a rear lifting oil cylinder seat 2-1, a rear lifting oil cylinder 2-2, a lifting platform 2-3, a four-bar linkage mechanism 2-4, a front stabilizing mechanism 2-5, a front lifting oil cylinder top seat 2-6, a front lifting oil cylinder base 2-7, a front lifting oil cylinder 2-8, a swing oil cylinder I 2-9, a swing oil cylinder seat 2-10, a support oil cylinder seat 2-11, and a flap 2-12. There are four rear lifting oil cylinder seats 2-1, which are arranged in two groups symmetrically left and right. The bottom ends thereof are fixedly connected to the corresponding mounting holes in the middle of the platform 1-5. One end of the cylinder body of the rear lifting oil cylinder 2-2 is hinged to the rear lifting oil cylinder seat 2-1, and one end of the telescopic rod of the rear lifting oil cylinder 2-2 is hinged to the rotary fixing seat of the front drill arm part 3. The bottom of the four-bar linkage mechanism 2-4 is fixed to the platform 1-5, and the top end thereof is hinged to the connecting ear of the lifting platform 2-3. There are two groups of front stabilizing mechanisms 2-5, which are arranged symmetrically left and right. The bottom ends thereof are fixed to the platform 1-5, and the top ends thereof are hinged to the connecting ear in the middle of the bottom surface of the lifting platform 2-3. The front lifting oil cylinder top seat 2-6 is fixed above the lifting platform 2-3. There are two front lifting oil cylinder bases 2-7, which are symmetrically installed left and right on the platform 1-5. One end of the cylinder body of the front lifting oil cylinder 2-8 is hinged to the front lifting oil cylinder base 2-7, and one end of the telescopic rod of the front lifting oil cylinder 2-8 is hinged to the front lifting oil cylinder top seat 2-6. The telescopic rods of the rear lifting oil cylinder 2-2 and the front lifting oil cylinder 2-8 stretch and drive the four-bar linkage mechanism 2-4, the front stabilizing mechanism 2-5, and the lifting platform 2-3 to move up and down, meeting the requirements of mechanical drilling construction at different heights. There are two swing oil cylinder seats 2-10, which are arranged symmetrically left and right. The swing oil cylinder seats 2-10 are fixed at the bottom surface position of the lifting platform 2-3. There are two swing oil cylinders I 2-9, which are arranged symmetrically left and right. The cylinder body of the swing oil cylinder I 2-9 is fixedly connected to the swing oil cylinder seat 2-10. There are two flaps 2-12, which are arranged symmetrically left and right. The flaps 2-12 are connected to the rotating shaft of the swing oil cylinder I 2-9. The rotation of the rotating shaft of the swing oil cylinder I 2-9 drives the flaps 2-12 to move, realizing the actions of the flaps 2-12 turning outwards and retracting inwards. According to different operating positions of the front drill arm part 3, the positions of the flaps 2-12 are adjusted in real time. The support oil cylinder seat 2-11 is installed at the front end of the lifting platform 2-3 to provide support for the support oil cylinder 5-5 of the front support 5.

[0036] The front drill arm part 3 has the structure of the patent with the patent number 201110207324.9 and the invention name of "A drill arm device with omnidirectional rotation". The front drill arm part 3 adopts a cantilever mechanism and is arranged on the lifting platform. By using a swing oil cylinder with a vertically installed axis and a swing oil cylinder with a horizontally installed axis, 360° spatial free rotation of the drill arm can be realized. At the same time, a secondary telescopic stroke is realized through a telescopic oil cylinder, and the drill arm can be moved up and down and back and forth left and right through a support oil cylinder and a rotary oil cylinder to perform the operations of top bolt and cable bolt and high-position side bolt drilling. It has the advantages of large adjustment angle, simple structure, convenient and flexible operation, etc.

[0037] The airborne bolt drill 4 has the structure of the patent with the patent number 202321202954.1 and the invention title of "An airborne drill device with a clamping function". The sliding assembly of the airborne bolt drill 4 is propelled by a sliding oil cylinder and guided by double guide columns, which is used for positioning during drilling, increasing the stability of the drill construction. Cooperating with the front-end gripper, it can quickly realize functions such as pre-drilling positioning, drill pipe support, and drill pipe disconnection and connection, greatly improving the drilling construction efficiency. The propulsion oil cylinder of the airborne bolt drill 4 is a two-stage propulsion structure, which can achieve a large working stroke. Moreover, the oil cylinders are located on both sides of the slideway, which is also convenient for maintenance and replacement, ensuring requirements in multiple aspects such as high strength, large thrust, and long stroke.

[0038] Such as Figure 5 , Figure 6As shown, the front support 5 is composed of a limit pin 5-1, a support outer sleeve 5-2, a support telescopic oil cylinder 5-3, a support inner sleeve 5-4, a support support oil cylinder 5-5, a support telescopic seat 5-6, a spring assembly 5-7, a top support telescopic oil cylinder 5-8, a top support inner sleeve 5-9, a support top beam 5-10, a side support top beam 5-11, and a support adjustment oil cylinder 5-12; the connecting block in the middle of the support outer sleeve 5-2 is hinged to the front end of the lifting platform 2-3. The limit pin 5-1 is of an inserted structure and is installed at the hinge joint between the rear connecting ear of the support outer sleeve 5-2 and the connecting ear of the lifting platform 2-3. Before the support operation, the connection here can be manually loosened. There are two support support oil cylinders 5-5, arranged symmetrically left and right. One end of the cylinder body of the support support oil cylinder 5-5 is hinged to the support oil cylinder seat 2-11, and one end of the telescopic rod of the support support oil cylinder 5-5 is hinged to the connecting block outside the support outer sleeve 5-2. One end of the cylinder body of the support telescopic oil cylinder 5-3 is hinged to the connecting block inside the support outer sleeve 5-2, and one end of the telescopic rod of the support telescopic oil cylinder 5-3 is hinged to the connecting block inside the support inner sleeve 5-4. The support inner sleeve 5-4 is nested inside the support outer sleeve 5-2. The support telescopic seat 5-6 is of a front and rear sleeve structure and is hinged to the top end of the support inner sleeve 5-4. There are two spring assemblies 5-7, arranged symmetrically left and right. One end of its connecting sleeve is fixed to the left and right sides at the bottom of the support telescopic seat 5-6, and one end of its positioning pin is fixed to the left and right sides at the top of the support inner sleeve 5-4. Its function is to make the support top beam 5-10 adjust in the front and rear and left and right directions within a certain angle to ensure that it can fit the roadway roof. There are two top support inner sleeves 5-9, and one end of its square tube is installed inside the square tube of the support telescopic seat 5-6 respectively. There are two top support telescopic oil cylinders 5-8, and one is installed in each of the two top support inner sleeves 5-9. One end of the cylinder body of the top support telescopic oil cylinder 5-8 is hinged to the connecting block inside the support telescopic seat 5-6, and one end of the telescopic rod of the top support telescopic oil cylinder 5-8 is hinged to the connecting block inside the top support inner sleeve 5-9. There are three support top beams 5-10, two of which are hinged in the card slots at the top ends of the top support inner sleeves 5-9, and the other one is hinged in the card slot at the top end of the support telescopic seat 5-6. There are cylindrical protrusions on it for convenient positioning of the anchor net. There are two side support top beams 5-11, arranged symmetrically left and right, and are fixedly connected to the connecting block at the top end of the top support inner sleeve 5-9. There are two support adjustment oil cylinders 5-12. One end of the cylinder body of the support adjustment oil cylinder 5-12 is hinged to the connecting block below the top support inner sleeve 5-9, and one end of the telescopic rod of the support adjustment oil cylinder 5-12 is hinged to the connecting block below the side support top beam 5-11;The front support 5 can be lifted upwards under the drive of the support telescopic oil cylinder 5-3 and the support support oil cylinder 5-5 to tightly press against the roadway roof, ensuring the stability during the operation of the jumbo, preventing the roof from collapsing, protecting the safety of the operator. The inner sleeve 5-9 of the top support can extend outwards by 650 mm at both left and right ends under the drive of the top support telescopic oil cylinder 5-8. At the same time, the side support top beam 5-11 can be lifted upwards under the drive of the support adjustment oil cylinder 5-12, and the support width can reach 2.9 m, greatly increasing the effective support area.

[0039] As Figure 7 , Figure 8 shown, the rear drill arm part 6 is composed of a rear drill arm connecting seat 6-1, a left rear drill 6-2, and a right rear drill 6-3. The rear drill arm connecting seat 6-1 is installed above the rear of the platform 1-5 of the machine body part 1. The left rear drill 6-2 and the right rear drill 6-3 are symmetrically arranged on the rear drill arm connecting seat 6-1.

[0040] The left rear drill 6-2 is composed of a slewing oil cylinder 6-2-1, a rear drill arm slewing seat 6-2-2, a swing rod 6-2-3, a swing rod support oil cylinder 6-2-4, a swing oil cylinder II 6-2-5, a swing oil cylinder guard 6-2-6, a swing oil cylinder plate 6-2-7, and a rear-mounted roof bolter 6-2-8. The bottom of the rear drill arm slewing seat 6-2-2 is coaxially and fixedly installed with the connecting block in the middle of the rear drill arm connecting seat 6-1. One end of the cylinder block of the slewing oil cylinder 6-2-1 is fixedly installed on the connecting block near the edge of the rear drill arm connecting seat 6-1. The telescopic rod of the slewing oil cylinder 6-2-1 is hinged to the connecting ear below the rear drill arm slewing seat 6-2-2. The square cylinder arc end of the swing rod 6-2-3 is hinged to the connecting block in the middle of the rear drill arm slewing seat 6-2-2. The other end surface of the swing rod 6-2-3 is installed with a swing oil cylinder II 6-2-5. One end of the cylinder block of the swing rod support oil cylinder 6-2-4 is hinged to the connecting block at the top of the rear drill arm slewing seat 6-2-2. One end of the telescopic rod of the swing rod support oil cylinder 6-2-4 is hinged to the connecting block at the top of the swing rod 6-2-3. The swing oil cylinder plate 6-2-7 is fixedly connected to the outer side surface of the swing oil cylinder II 6-2-5. Another swing oil cylinder II 6-2-5 is installed above the swing oil cylinder plate 6-2-7 and is connected to the rear-mounted roof bolter 6-2-8 on the side. There are two swing oil cylinder guards 6-2-6, which are respectively fixed above the two swing oil cylinders II 6-2-5. The rear drill arm part 6 adopts a cantilever slewing structure. The rear-mounted roof bolter 6-2-8 is driven by the slewing oil cylinder 6-2-1 to swing left and right. At the same time, the swing rod support oil cylinder 6-2-4 drives the rear-mounted roof bolter 6-2-8 to lift up and down to adjust the height, and the two swing oil cylinders II 6-2-5 rotate to drive the rear-mounted roof bolter 6-2-8 to rotate left and right to adjust the angle, so as to carry out the low-side roof bolting operation. The front and rear drill arms cooperate to complete the full-section roof bolting operation, giving full play to the cooperation ability of people, equipment, and time, and improving the efficiency of the support operation.

[0041] As Figure 9 shown, the sliding staircase assembly 7 is composed of a connecting shield 7-1, a connecting seat 7-2, a sliding tread 7-3, a sliding seat 7-4, a guide wheel 7-5, and a guardrail 7-6; the connecting shield 7-1 is fixed above the front drill arm part 3, there are two connecting seats 7-2, which are respectively fixed on the corresponding mounting holes above the connecting shield 7-1, the sliding seat 7-4 is installed above the guard plate part 8, the connecting block at the front end of the sliding tread 7-3 is hinged to the two connecting seats 7-2, there are two guide wheels 7-5, which are respectively fixed at the connecting blocks at the tail end of the sliding tread 7-3, and the two side guide wheels 7-5 are placed in the card slots inside the sliding seat 7-4. When the lifting part 2 rises, it drives the front end of the sliding tread 7-3 to rise, and its tail end slides forward along the card slot inside the sliding seat 7-4 through the guide wheel 7-5, so that the sliding tread 7-3 forms a slope. On the contrary, when the lifting part 2 descends, the sliding tread 7-3 will be flattened, and the standing surface of the sliding tread 7-3 is designed as an anti-slip alligator mouth steel plate. The overall mechanism is firm, the performance is stable, which is convenient for the operator to walk back and forth. There are two guardrails 7-6, which are symmetrically fixed on both sides of the sliding tread 7-3, used to prevent people from accidentally falling from the unit, and can also facilitate people to hold when going up and down the slope, protecting people's safety. It adopts an inserted structure, which is convenient for disassembly and assembly.

[0042] As Figure 10 、 Figure 11 shown, the operating part 9 is composed of a left-side operation 9-1, a right-side operation 9-2, a slideway 9-3, an inner sliding frame 9-4, and a sliding oil cylinder 9-5; the slideway 9-3 is fixed in the middle of the platform 1-5, there are two inner sliding frames 9-4, which are symmetrically installed on the slideway 9-3 left and right, and the left and right sides of the inner sliding frame 9-4 are placed in the long slots on both sides of the slideway 9-3, so that the slideway 9-3 can play a guiding role for the inner sliding frame 9-4. The left-side operation 9-1 and the right-side operation 9-2 are respectively installed at the corresponding mounting holes on the inner sliding frame 9-4. There are two sliding oil cylinders 9-5, which are symmetrically arranged left and right. One end of the cylinder body of the sliding oil cylinder 9-5 is hinged to the connecting ear in the middle of the slideway 9-3, and one end of the telescopic rod of the sliding oil cylinder 9-5 is hinged to the connecting ear inside the inner sliding frame 9-4. Under the action of the sliding oil cylinder 9-5, it can drive the left-side operation 9-1 and the right-side operation 9-2 to extend and retract to the left and right sides respectively, which is convenient for the operator to operate.

[0043] This jumbo operates alternately with the roadheader, integrating multiple functions such as temporary support, drilling bolt and cable holes in the roof and sidewalls. It allows parallel operation of the roof and sidewalls, effectively improving the roadway support efficiency. On this basis, it alleviates the current situation of tight connection and imbalance between roadway excavation and mining, and reduces the equipment investment in roadway construction to a certain extent. The jumbo is equipped with four independent boom mechanisms. The front boom adopts a cantilever mechanism and is arranged on the lifting platform. Through the overall lifting of the lifting platform, the rotation, lifting, telescoping of the boom and the 360° rotation of the on-board bolt drill, the operations of installing roof bolts and cables and drilling high-position sidewall bolt holes are carried out; the rear boom performs low-position sidewall bolt operations through the rotation of the boom. The front and rear booms cooperate to complete the full-section bolt support operation. The four drills can be independently operated in parallel without interference with each other. The jumbo uses an integrally lifting work platform to meet the drilling requirements at different working heights through platform lifting. At the same time, the work platform is equipped with a flip plate that can be flipped and unfolded, facilitating the standing and operation of the operators; the jumbo is equipped with an adjustable, telescoping and deployable front support device. This device has a large range of front and rear angle adjustments and can support the roadway roof or the heading face according to construction requirements, meeting the safety needs of drilling, bolting and probing construction and effectively ensuring the construction safety of the operators. The unit is equipped with two hydraulic pump stations to control the front and rear booms respectively.

[0044] The whole machine of this jumbo adopts solenoid valves plus remote control, and all the actuators of the whole machine adopt hydraulic drive mode, including key actions such as propulsion, rotation, and positioning. It can achieve precise and reliable remote operation, ensure strong power and rapid response, and at the same time meet the high-efficiency and safe operation requirements under complex working conditions.

[0045] This jumbo has greatly improved the roadway tunneling efficiency and the adaptability of the support equipment to roadway tunneling. It is a preferred equipment for realizing rapid, efficient and mechanized roadway tunneling support in China at present.

Claims

1. A four-boom drill jumbo for coal mines, characterized in that: It is composed of a body part (1), a lifting part (2), a front drill arm part (3), an airborne anchor drill (4), a front support (5), a rear drill arm part (6), a sliding staircase assembly (7), a guard plate part (8), an operating part (9), an electrical system (10) and a hydraulic system (11); The body part (1) is installed below the lifting part (2). There are two sets of the front drill arm parts (3), which are symmetrically installed on the left and right sides of the lifting part (2). There are two airborne anchor drills (4), which are respectively installed at the front ends of the front drill arm parts (3). The front support (5) is installed at the front end of the lifting part (2). The rear drill arm part (6) is installed at the middle position of the body part (1). The guard plate part (8) is installed at the upper rear position of the body part (1). The operating part (9) is placed below the front end of the guard plate part (8) and fixed on the body part (1). The front end of the sliding staircase assembly (7) is fixed at the upper rear position above the front drill arm part (3), and its rear end is fixed above the guard plate part (8). The electrical system (10) is installed below the guard plate part (8), and the hydraulic system (11) is installed at the rear end position of the guard plate part (8).

2. The four-arm drilling jumbo for coal mines according to claim 1, characterized in that: The body part (1) is composed of a scraper plate (1-1), a scraper plate oil cylinder (1-2), a scraper plate oil cylinder seat (1-3), a front connecting cross beam (1-4), a platform (1-5), a traveling assembly (1-6), a rear connecting cross beam (1-7), a drill pipe box (1-8), a switch fixing bracket (1-9), a water pressure reducing valve (1-10), and a double-circuit electric control box (1-11); One end of the scraper plate (1-1) is hinged to the bottom of the front connecting cross beam (1-4). One end of the scraper plate oil cylinder seat (1-3) is installed in the front mounting hole of the front connecting cross beam (1-4). There are two scraper plate oil cylinders (1-2), which are symmetrically arranged on the left and right. One end of the cylinder body of the scraper plate oil cylinder (1-2) is hinged to the scraper plate oil cylinder seat (1-3), and one end of the telescopic rod of the scraper plate oil cylinder (1-2) is hinged to the connecting ear on the scraper plate. When the telescopic rod of the scraper plate oil cylinder (1-2) extends, it drives the scraper plate (1-1) to press down on the roadway floor. When the telescopic rod of the scraper plate oil cylinder (1-2) retracts, it drives the scraper plate (1-1) to lift upward. The upper surface of the front connecting cross beam (1-4) is connected to the front part of the bottom surface of the platform (1-5), and the rear connecting cross beam (1-7) is connected to the rear part of the bottom surface of the platform (1-5). The platform (1-5) is installed on the front connecting cross beam (1-4) and the rear connecting cross beam (1-7). There is a set of traveling assemblies (1-6), which are respectively installed on the left and right sides of the front connecting cross beam (1-4) and the rear connecting cross beam (1-7). The drill pipe box (1-8) is fixed on the corresponding mounting hole in the middle of the platform (1-5) for facilitating the placement of spare drill pipes. The switch fixing bracket (1-9) is installed at the lower right corner position on the platform (1-5). The water pressure reducing valve (1-10) is fixed on the middle rear panel of the switch fixing bracket (1-9). The double-circuit electric control box (1-11) is installed on the switch fixing bracket (1-9) for facilitating the start and stop of the electrical system (10).

3. The four-arm drill rig for coal mines according to claim 1, characterized in that: The lifting part (2) is composed of a rear lifting oil cylinder seat (2-1), a rear lifting oil cylinder (2-2), a lifting platform (2-3), a four-bar linkage mechanism (2-4), a front stabilizing mechanism (2-5), a front lifting oil cylinder top seat (2-6), a front lifting oil cylinder bottom seat (2-7), a front lifting oil cylinder (2-8), a swing oil cylinder I (2-9), a swing oil cylinder seat (2-10), a support oil cylinder seat (2-11), and a flap (2-12); there are four rear lifting oil cylinder seats (2-1) in total, which are arranged symmetrically in two groups on the left and right. The bottom end of the rear lifting oil cylinder seat (2-1) is fixedly connected to the corresponding mounting hole in the middle of the platform (1-5). One end of the cylinder body of the rear lifting oil cylinder (2-2) is hinged to the rear lifting oil cylinder seat (2-1), and one end of the telescopic rod of the rear lifting oil cylinder (2-2) is hinged to the rotary fixed seat of the front drill arm part. The bottom of the four-bar linkage mechanism (2-4) is fixed to the platform (1-5), and the top of the four-bar linkage mechanism (2-4) is hinged to the connecting ear of the lifting platform (2-3). There are two groups of front stabilizing mechanisms (2-5) in total, which are arranged symmetrically on the left and right. The bottom of the front stabilizing mechanism (2-5) is fixed to the platform (1-5), and the top of the front stabilizing mechanism (2-5) is hinged to the connecting ear in the middle of the bottom surface of the lifting platform (2-3). The front lifting oil cylinder top seat (2-6) is fixed above the lifting platform (2-3). There are two front lifting oil cylinder bottom seats (2-7) in total, which are symmetrically installed on the left and right on the platform (1-5). One end of the cylinder body of the front lifting oil cylinder (2-8) is hinged to the front lifting oil cylinder bottom seat (2-7), and one end of the telescopic rod of the front lifting oil cylinder (2-8) is hinged to the front lifting oil cylinder top seat (2-6). The telescopic rods of the rear lifting oil cylinder (2-2) and the front lifting oil cylinder (2-8) stretch and drive the four-bar linkage mechanism (2-4), the front stabilizing mechanism (2-5), and the lifting platform (2-3) to lift up and down, meeting the requirements of mechanical drilling construction at different heights. There are two swing oil cylinder seats (2-10) in total, which are arranged symmetrically on the left and right. The swing oil cylinder seats (2-10) are fixed at the bottom surface position of the lifting platform (2-3). There are two swing oil cylinders I (2-9) in total, which are arranged symmetrically on the left and right. The cylinder body of the swing oil cylinder I (2-9) is fixedly connected to the swing oil cylinder seat (2-10). There are two flaps (2-12) in total, which are arranged symmetrically on the left and right. The flap (2-12) is connected to the rotating shaft of the swing oil cylinder I (2-9). The rotation of the rotating shaft of the swing oil cylinder I (2-9) drives the flap (2-12) to move, realizing the outward turning and inward retraction actions of the flap (2-12). According to different operating positions of the front drill arm part, the position of the flap (2-12) is adjusted in real time. The support oil cylinder seat (2-11) is installed at the front end of the lifting platform (2-3) to provide support for the support oil cylinder (5-5) of the front support (5).

4. The four-arm drilling jumbo for coal mines according to claim 1, characterized in that: The front support (5) is composed of a limit pin (5-1), a support outer sleeve (5-2), a support telescopic oil cylinder (5-3), a support inner sleeve (5-4), a support support oil cylinder (5-5), a support telescopic seat (5-6), a spring assembly (5-7), a top support telescopic oil cylinder (5-8), a top support inner sleeve (5-9), a support top beam (5-10), a side support top beam (5-11), and a support adjustment oil cylinder (5-12); the connecting block in the middle of the support outer sleeve (5-2) is hinged to the front end of the lifting platform (2-3), the limit pin (5-1) is an inserted structure, and the limit pin (5-1) is installed at the hinge joint between the rear connecting ear of the support outer sleeve (5-2) and the connecting ear of the lifting platform (2-3). There are two support support oil cylinders (5-5) arranged symmetrically left and right. One end of the cylinder body of the support support oil cylinder (5-5) is hinged to the support oil cylinder seat (2-11), and one end of the telescopic rod of the support support oil cylinder (5-5) is hinged to the connecting block on the outside of the support outer sleeve (5-2). One end of the cylinder body of the support telescopic oil cylinder (5-3) is hinged to the connecting block inside the support outer sleeve (5-2), and one end of the telescopic rod of the support telescopic oil cylinder (5-3) is hinged to the connecting block inside the support inner sleeve (5-4). The support inner sleeve (5-4) is nested inside the support outer sleeve (5-2). The support telescopic seat (5-6) is a front and rear sleeve structure and is hinged to the top of the support inner sleeve (5-4). There are two spring assemblies (5-7) arranged symmetrically left and right. One end of its connecting sleeve is fixed to the left and right sides of the bottom of the support telescopic seat (5-6), and one end of its positioning pin is fixed to the left and right sides of the top of the support inner sleeve (5-4). Its function is to enable the support top beam (5-10) to make front-back and left-right adjustments within a certain angle. There are two top support inner sleeves (5-9), and one end of its square tube is installed inside the square tube of the support telescopic seat (5-6). There are two top support telescopic oil cylinders (5-8), and one is installed in each of the two top support inner sleeves (5-9). One end of the cylinder body of the top support telescopic oil cylinder (5-8) is hinged to the connecting block inside the support telescopic seat (5-6), and one end of the telescopic rod of the top support telescopic oil cylinder (5-8) is hinged to the connecting block inside the top support inner sleeve (5-9). There are three support top beams (5-10), two of which are hinged in the card slots at the top of the top support inner sleeve (5-9), and the other one is hinged in the card slot at the top of the support telescopic seat (5-6). A cylindrical protrusion is provided on it for convenient positioning of the anchor net. There are two side support top beams (5-11) arranged symmetrically left and right and are fixedly connected to the connecting block at the top of the top support inner sleeve (5-9). There are two support adjustment oil cylinders (5-12). One end of the cylinder body of the support adjustment oil cylinder (5-12) is hinged to the connecting block below the top support inner sleeve (5-9), and one end of the telescopic rod of the support adjustment oil cylinder (5-12) is hinged to the connecting block below the side support top beam (5-11).

5. The four-arm drilling jumbo for coal mines according to claim 1, characterized in that: The rear drill arm part (6) is composed of a rear drill arm connecting seat (6-1), a left rear drill (6-2), and a right rear drill (6-3); the rear drill arm connecting seat (6-1) is installed above the rear of the platform (1-5) of the machine body part (1), and the left rear drill (6-2) and the right rear drill (6-3) are symmetrically arranged on the rear drill arm connecting seat (6-1).

6. The four-arm drilling jumbo for coal mines according to claim 5, characterized in that: The left rear drill (6-2) is composed of a slewing cylinder (6-2-1), a rear drill arm slewing seat (6-2-2), a swing rod (6-2-3), a swing rod support cylinder (6-2-4), a swing cylinder II (6-2-5), a swing cylinder guard (6-2-6), a swing cylinder plate (6-2-7), and a rear-mounted roof bolter (6-2-8); the bottom of the rear drill arm slewing seat (6-2-2) is coaxially and fixedly installed with the connecting block in the middle of the rear drill arm connecting seat (6-1), one end of the cylinder body of the slewing cylinder (6-2-1) is fixed on the connecting block near the edge of the rear drill arm connecting seat (6-1), the telescopic rod of the slewing cylinder (6-2-1) is hinged to the connecting ear below the rear drill arm slewing seat (6-2-2), the square cylinder arc end of the swing rod (6-2-3) is hinged to the connecting block in the middle of the rear drill arm slewing seat (6-2-2), the other end surface of the swing rod (6-2-3) is installed with a swing cylinder II (6-2-5), one end of the cylinder body of the swing rod support cylinder (6-2-4) is hinged to the connecting block at the top of the rear drill arm slewing seat (6-2-2), one end of the telescopic rod of the swing rod support cylinder (6-2-4) is hinged to the connecting block at the top of the swing rod (6-2-3), the swing cylinder plate (6-2-7) is fixedly connected to the outer side surface of the swing cylinder II (6-2-5), another swing cylinder II (6-2-5) is installed above the swing cylinder plate (6-2-7), and the side is connected to the rear-mounted roof bolter (6-2-8). There are two swing cylinder guards (6-2-6), which are respectively fixed above the two swing cylinders II (6-2-5); the rear drill arm part (6) adopts a cantilever slewing structure. The slewing cylinder (6-2-1) drives the rear-mounted roof bolter (6-2-8) to swing left and right. At the same time, the swing rod support cylinder (6-2-4) drives the rear-mounted roof bolter (6-2-8) to lift up and down to adjust the height, and the two swing cylinders II (6-2-5) rotate to drive the rear-mounted roof bolter (6-2-8) to rotate left and right to adjust the angle, so as to perform the low-side roof bolting operation.

7. The four-arm drill rig for coal mines according to claim 1, characterized in that: The sliding staircase assembly (7) consists of a connecting shield (7-1), a connecting seat (7-2), a sliding tread (7-3), a sliding seat (7-4), a guide wheel (7-5), and a guardrail (7-6); the connecting shield (7-1) is fixed above the front drill arm part (3), there are two connecting seats (7-2) respectively fixed on the corresponding mounting holes above the connecting shield (7-1), the sliding seat (7-4) is installed above the guard plate part (8), the connecting block at the front end of the sliding tread (7-3) is hinged to the two connecting seats (7-2), there are two guide wheels (7-5) respectively fixed at the connecting blocks at the tail end of the sliding tread (7-3), and the two side guide wheels (7-5) are placed in the card slots inside the sliding seat (7-4). When the lifting part (2) rises, it drives the front end of the sliding tread (7-3) to lift, and its tail end slides forward along the card slot inside the sliding seat (7-4) through the guide wheel (7-5), so that the sliding tread (7-3) forms a slope. On the contrary, when the lifting part (2) descends, the sliding tread (7-3) will be flattened. There are two guardrails (7-6) symmetrically fixed on both sides of the sliding tread (7-3).

8. The four-arm drilling jumbo for coal mines according to claim 1, characterized in that: The control part (9) consists of a left control (9-1), a right control (9-2), a slideway (9-3), an inner sliding frame (9-4), and a sliding oil cylinder (9-5); the slideway (9-3) is fixed in the middle of the platform (1-5), there are two inner sliding frames (9-4) symmetrically installed on the slideway (9-3), and the left and right sides of the inner sliding frame (9-4) are placed in the long slots on both sides of the slideway (9-3), so that the slideway (9-3) can play a guiding role for the inner sliding frame (9-4). The left control (9-1) and the right control (9-2) are respectively installed at the corresponding mounting holes on the inner sliding frame (9-4). There are two sliding oil cylinders (9-5) symmetrically arranged on the left and right. One end of the cylinder body of the sliding oil cylinder (9-5) is hinged to the connecting ear in the middle of the slideway (9-3), and one end of the telescopic rod of the sliding oil cylinder (9-5) is hinged to the connecting ear inside the inner sliding frame (9-4). Under the action of the sliding oil cylinder (9-5), it can drive the left control (9-1) and the right control (9-2) to extend and retract to the left and right sides respectively.

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