A cantilever anchor mining machine and anchor support method

Abstract

The present invention provides a cantilever anchor digger and anchor support method, which belongs to the technical field of anchor diggers. The cantilever anchor digger includes a cutting part, a frame, a loading part, a scraper conveyor, a walking part, a temporary support mechanism, a hydraulic system and an electrical system; the cutting part is hinged with the turntable of the frame; the loading part is hinged with the front end of the frame; the scraper conveyor is located in the middle of the machine, the front end is hinged with the frame and the loading part, and the rear part is supported on the frame; the walking part is symmetrically arranged on both sides of the frame; the temporary support mechanism is installed on the upper part of the cutting part; an airborne drilling system is slidably arranged on the guard plate of the walking part, and the airborne drilling system is driven by the drilling propulsion mechanism to move back and forth in a straight line along the guard plate. The present invention is an anchor digger designed for the actual situation of underground excavation operations in coal mines, integrating cutting, temporary support, anchor protection and transportation functions, and can realize the simultaneous overhead and anchor support operations of four drill racks, effectively improving the efficiency of support operations.

Description

Technical Field

[0001] The invention belongs to the technical field of anchor digging machines, and specifically discloses a cantilever anchor digging machine and an anchor support method. Background Art

[0002] At present, the connection between mining and excavation in most mining areas is tight, and the commonly used tunneling, support and anchoring equipment can be roughly divided into two types:

[0003] 1. Under moderate geological conditions, the improved integrated digging and anchoring machine based on the continuous mining machine is used, with a monthly footage of about one kilometer;

[0004] 2. Under complex geological survey conditions, a cantilever anchor drill is used as the excavation equipment. The airborne drilling system is integrated on both sides of the fuselage. The airborne drilling system includes a top anchor drill and a side anchor drill.

[0005] The main problem with the above devices.

[0006] 1. The integrated mining and anchoring unit improved on the basis of the continuous mining machine has a large equipment investment, and its ability to mine high-hardness tunnels is limited. It can only mine rectangular tunnels of a certain size, and cannot meet the requirements of working in smaller empty top tunnels, and has poor safety. It cannot be well promoted and applied in mining areas with special-shaped tunnels, poor geological conditions, high rock hardness or poor roof conditions.

[0007] 2. Under complex geological survey conditions, "short excavation and short support" is generally adopted. After cutting 1-2 support row spacings, anchor support is required. In addition to the bottom anchor, the top and side anchors are required to follow the head support. With a cantilever anchor drill as the excavation equipment, the top anchor drill is located in front of the drill arm, and the side anchor drill is located behind the base. The distance between the top and side drills is too large, resulting in the side drill being far away from the head and unable to perform side anchor operations. The top anchor drill has a small support range due to structural limitations, and the adjustment time required for hitting the side anchor is too long, resulting in the inability to improve the efficiency of the work surface support operation. Summary of the invention

[0008] The purpose of the present invention is to provide a cantilever anchor digger, which is an anchor digging equipment designed for the actual situation of underground coal mine excavation operations. It integrates cutting, temporary support, anchoring and transportation functions. Two airborne drilling rig systems are symmetrically arranged on both sides of the fuselage, and each drill arm integrates two drilling rigs to meet the support requirements of "short excavation and short support" in tunnels under complex geological conditions. It can realize four drill frames to simultaneously face the top and help anchor support operations, effectively improve the support operation efficiency, and provide an anchor support method based on the above-mentioned cantilever anchor digger.

[0009] To achieve the above-mentioned purpose, the present invention provides a cantilever anchor miner, comprising a cutting part, a frame, a loading part, a scraper conveyor, a traveling part, a temporary support mechanism, a hydraulic system and an electrical system; the cutting part is hinged to the rotating table of the frame; the loading part is hinged to the front end of the frame; the scraper conveyor is located in the middle of the machine, the front end is hinged to the frame and the loading part, and the rear part is supported on the frame; the traveling part is symmetrically arranged on both sides of the frame; the temporary support mechanism is installed on the upper part of the cutting part; an airborne drilling system is slidably arranged on the guard plate of the traveling part, and the airborne drilling system is driven by the drilling propulsion mechanism to move back and forth in a straight line along the guard plate;

[0010] The airborne drilling rig system includes a first drilling rig, a second drilling rig, a first swing mechanism, a second swing mechanism, a connecting plate, a width adjustment mechanism, an operating platform, a leveling mechanism, a telescopic arm, a base arm, a lifting mechanism, a slewing mechanism, a base and a slide rail; the slide rail is slidably matched with the guard plate of the walking part; the base is slidably arranged on the slide rail, and is driven by the base propulsion mechanism to make a linear reciprocating movement along the slide rail; the rear end of the base arm is hinged to the base and can swing up and down and left and right, and a lifting mechanism and a slewing mechanism are installed between the base arm and the base, the lifting mechanism is used to control the up and down swing of the base arm, and the slewing mechanism is used to control the left and right swing of the base arm; the telescopic arm is inserted from the front end of the base arm, and the base arm and the telescopic arm are connected. A telescopic mechanism for controlling the extension and retraction of the telescopic arm is installed; the operating platform and the telescopic arm are hinged, and a leveling mechanism is installed between the operating platform and the telescopic arm, and the leveling mechanism is used to adjust the angle between the operating platform and the telescopic arm; the first swing mechanism is installed on the operating platform, and the swing interface is vertically connected to the second swing mechanism; the connecting plate is a T-shaped plate or an L-shaped plate rotated 90°; the swing interface of the second swing mechanism is connected to the horizontal plate of the connecting plate; the first drill rig is connected to the vertical plate of the connecting plate; the second drill rig is connected to the connecting plate through a width adjustment mechanism, and the width adjustment mechanism is used to adjust the distance between the second drill rig and the first drill rig; the first drill rig and the second drill rig are parallel to the operating platform.

[0011] Furthermore, a slide rail clamp is provided on the guard plate of the walking part and on the base, and the slide rail clamp cooperates with the slide rail.

[0012] Furthermore, the drilling rig propulsion mechanism is a propulsion cylinder; the base propulsion mechanism includes a motor arranged on the base, a reducer connected to the motor, a gear connected to the reducer, and a rack arranged on the slide rail; the gear is meshed with the rack.

[0013] Furthermore, the lifting mechanism is a lifting cylinder, and the rotating mechanism is a rotating cylinder; three groups of first articulated seats are arranged on the base, the first articulated seat is hinged to the second articulated seat through a vertical hinge shaft, and the second articulated seat is respectively articulated to the base arm, the cylinder body of the lifting cylinder and the cylinder body of the rotating cylinder through a horizontal hinge shaft; the piston of the lifting cylinder is articulated to the base arm through a horizontal hinge shaft; the piston of the rotating cylinder is articulated to the base arm through a horizontal hinge shaft.

[0014] Furthermore, the leveling mechanism is a leveling cylinder, and both ends of the leveling cylinder are respectively hinged to the operating platform and the telescopic arm through horizontal hinge shafts.

[0015] Furthermore, the first swing mechanism is a first swing cylinder, and the second swing mechanism is a second swing cylinder; the first swing cylinder is horizontally arranged, and the second swing cylinder is vertically arranged, and the first swing cylinder and the second swing cylinder are coaxially arranged.

[0016] Furthermore, the width-adjusting mechanism is a width-adjusting oil cylinder, and two ends of the width-adjusting oil cylinder are respectively connected to the second drilling rig and the connecting plate.

[0017] Furthermore, the pump station, oil tank and motor of the hydraulic system adopt an integrated design and are connected to the rear of the frame by high-strength bolts; the electric control box of the electrical system is arranged on the upper side of the oil tank.

[0018] The present invention also provides an anchor support method, which uses the above-mentioned cantilever anchor miner. When the cantilever anchor miner performs cutting operations, the base retreats to the rearmost end of the slide rail, the slewing mechanism rotates inward to close the base arm, the second swing mechanism rotates so that the first drilling frame and the second drilling frame are respectively located in front of and behind the second swing mechanism, and the airborne drilling rig system is located at the rear side of the slewing table;

[0019] When the cantilever bolter is performing support operations, the cutting blasting head lands in the middle and the temporary support mechanism is deployed;

[0020] First, the top anchor support operation is carried out. The lifting mechanism controls the base arm to rise, the slewing mechanism controls the base arm to swing outward, the base moves forward, the telescopic arm extends, the first drilling rig and the second drilling rig are moved to the head, the lifting mechanism, the first swing mechanism, and the second swing mechanism are adjusted, the first drilling rig and the second drilling rig are moved to the vicinity of the position requiring support, the width adjustment mechanism is adjusted so that the distance between the first drilling rig and the second drilling rig is the actual distance between the anchors in the well, the second swing mechanism and the leveling mechanism are adjusted so that the first drilling rig and the second drilling rig can be accurately positioned;

[0021] When performing the anchor bolt operation, adjust the lifting mechanism, the first swing mechanism, and the second swing mechanism, move the first drill rig and the second drill rig to the vicinity of the position requiring support, adjust the first swing mechanism, the second swing mechanism and the leveling mechanism, and allow the first drill rig and the second drill rig to accurately find the eye and position.

[0022] The cantilever anchor digger provided by the present invention is an anchor digger designed for the actual situation of underground coal mine excavation operations, and integrates cutting, temporary support, anchor protection, and transportation functions. Compared with the prior art, the present invention has the following beneficial effects:

[0023] The cantilever anchor miner has two symmetrically mounted airborne drilling systems on both sides of the fuselage. Each drilling arm integrates two drilling rigs, which can meet the "short excavation and short support" support requirements of tunnels under complex geological conditions. It can realize the top and auxiliary anchor support operations of four drilling frames at the same time, effectively improving the support operation efficiency.

[0024] The drill rig can be moved beyond the cutting blast head and contact the head-on surface, realizing the head-on support operation with "zero control top distance" of four drill rigs at the same time;

[0025] When anchoring, there is no need to move the entire machine. It is only necessary to control the onboard drilling rig system to determine the position of the corresponding anchor. The drilling rig's degree of freedom can meet the anchor support requirements at any position in the tunnel; the distance between drilling rigs is adjustable to meet the anchor spacing requirements of any tunnel. The operation is simple and reduces the labor intensity of underground workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the cantilever bolter digger;

[0027] Figure 2 This is the structural front view of the airborne drilling system;

[0028] Figure 3 The figure is a top view of the structure of the airborne drilling rig system;

[0029] Figure 4 Schematic diagram of a cantilever bolter miner performing cutting operations;

[0030] Figure 5 Front view of the cantilever bolter miner performing support operations;

[0031] Figure 6 A top view of a boom bolter miner performing support work.

[0032] In the figure: 1-cutting part, 2-frame, 3-loading part, 4-scraper conveyor, 5-travel part, 6-temporary support mechanism, 7-airborne drilling system, 8-hydraulic system, 9-electrical system

[0033] 10-first drilling rig, 11-second drilling rig, 12-first swing cylinder, 13-second swing cylinder, 14-connecting plate, 15-width adjustment cylinder, 16-operating platform, 17-leveling cylinder, 18-telescopic arm, 19-base arm, 20-lifting cylinder, 21-rotating cylinder, 22-base, 23-slide rail. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] Example 1

[0036] The present invention provides a cantilever anchor miner, comprising a cutting part 1, a frame 2, a loading part 3, a scraper conveyor 4, a traveling part 5, a temporary supporting mechanism 6, a hydraulic system 8 and an electrical system 9.

[0037] The frame 2 is the skeleton of the entire machine, bearing various loads of cutting, traveling and loading. All components in the cantilever anchor miner are connected to the frame 2 with bolts or pins; the cutting part 1 is hinged to the turntable of the frame 2 through the two motor ears of the cutting motor and the pin; the loading part 3 is hinged to the front end of the frame 2; the scraper conveyor 4 is located in the middle of the machine, with the front end hinged to the frame 2 and the loading part 3, and the rear part supported on the frame 2; the traveling part 5 is symmetrically arranged on both sides of the frame 2; the temporary support mechanism 6 is installed on the upper part of the cutting part 1, and is specifically connected to the base of the cutting motor by bolts; an onboard drilling system 7 is slidably arranged on the guard plate of the traveling part 5, and the onboard drilling system 7 is driven by the drilling propulsion mechanism to move back and forth in a straight line along the guard plate.

[0038] The main function of the airborne drilling system 7 is to move the drilling rig to a suitable drilling and anchoring position and realize the drilling and anchoring operation, including a first drilling frame 10, a second drilling frame 11, a first swing mechanism, a second swing mechanism, a connecting plate 14, a width adjustment mechanism, an operating platform 16, a leveling mechanism, a telescopic arm 18, a base arm 19, a lifting mechanism, a slewing mechanism, a base 22 and a slide rail 23; the slide rail 23 is slidably matched with the guard plate of the walking part 5; the base 22 is slidably set on the slide rail 23, and is driven by the base propulsion mechanism to move back and forth along the slide rail 23 in a straight line; the rear end of the base arm 19 is hinged to the base 22 and can swing up and down and left and right. A lifting mechanism and a slewing mechanism are installed between the base arm 19 and the base 22. The lifting mechanism is used to control the up and down swing of the base arm 19, and the slewing mechanism is used to control the left and right swing of the base arm 19; the telescopic arm 18 is moved from the base arm 19 The front end is inserted, and a telescopic mechanism for controlling the telescopic arm's extension and retraction is installed between the base arm 19 and the telescopic arm 18; the operating platform 16 and the telescopic arm 18 are hinged, and a leveling mechanism is installed between the operating platform 16 and the telescopic arm 18, and the leveling mechanism is used to adjust the angle between the operating platform 16 and the telescopic arm 18; the first swing mechanism is installed on the operating platform 16, and the swing interface is vertically connected to the second swing mechanism; the connecting plate 14 is a T-shaped plate or an L-shaped plate rotated 90°; the swing interface of the second swing mechanism is connected to the horizontal plate of the connecting plate 14; the first drilling rig 10 is connected to the vertical plate of the connecting plate 14; the second drilling rig 11 is connected to the connecting plate 14 through a width adjustment mechanism, and the width adjustment mechanism is used to adjust the distance between the second drilling rig 11 and the first drilling rig 10; the first drilling rig 10 and the second drilling rig 11 are parallel to the operating platform 16.

[0039] Furthermore, a slide rail clamp is provided on the guard plate of the walking part 5 and the base 22 , and the slide rail clamp cooperates with the slide rail 23 .

[0040] Furthermore, the drilling rig propulsion mechanism is a propulsion cylinder, both ends of which are respectively connected to the guard plate and the airborne drilling rig system 7; the base propulsion mechanism includes a motor arranged on the base, a reducer connected to the motor, a gear connected to the reducer, and a rack arranged on the slide rail; the gear is meshed with the rack.

[0041] Furthermore, the lifting mechanism is a lifting cylinder 20, and the rotating mechanism is a rotating cylinder 21; three groups of first articulated seats are arranged on the base 22, the first articulated seat is hinged to the second articulated seat through a vertical hinge shaft, and the second articulated seat is respectively articulated to the base arm 19, the cylinder body of the lifting cylinder 20 and the cylinder body of the rotating cylinder 21 through a horizontal hinge shaft; the piston of the lifting cylinder 20 is articulated to the base arm 19 through a horizontal hinge shaft; the piston of the rotating cylinder 21 is articulated to the base arm 19 through a horizontal hinge shaft.

[0042] Furthermore, the leveling mechanism is a leveling cylinder 17 , and both ends of the leveling cylinder 17 are respectively hinged to the operating platform 16 and the telescopic arm 18 through horizontal hinge shafts.

[0043] Furthermore, the first swing mechanism is the first swing cylinder 12, and the second swing mechanism is the second swing cylinder 13; the first swing cylinder 12 is horizontally arranged, and the second swing cylinder 13 is vertically arranged, and the first swing cylinder 12 and the second swing cylinder 13 are coaxially arranged.

[0044] Furthermore, the width adjustment mechanism is a width adjustment cylinder 15 , both ends of which are respectively connected to the second drilling rig 11 and the connecting plate 14 , and the piston side of the width adjustment cylinder 15 is vertically connected to the second drilling rig 11 .

[0045] Furthermore, the pump station, oil tank and motor of the hydraulic system 8 are of integrated design and connected to the rear of the frame 2 by high-strength bolts; the electric control box of the electrical system 9 is arranged on the upper side of the oil tank.

[0046] Example 2

[0047] This embodiment provides an anchor support method, using the above-mentioned cantilever anchor miner, when the cantilever anchor miner performs cutting operation, the base 22 retreats to the rearmost end of the slide rail 23, the slewing mechanism rotates inward to retract the base arm 19, the second swing mechanism rotates so that the first drilling frame 10 and the second drilling frame 11 are respectively located in front and behind the second swing mechanism, and the airborne drilling system 7 is located at the rear side of the slewing table;

[0048] When the cantilever bolter is performing support operations, the cutting blasting head is centered and landed, and the temporary support mechanism 6 is deployed;

[0049] First, the top anchor support operation is carried out. The lifting mechanism controls the base arm 19 to rise, the slewing mechanism controls the base arm 19 to swing outward, the base 22 moves forward, and the telescopic arm 18 extends. The first drilling rig 10 and the second drilling rig 11 are moved to the front, and the lifting mechanism, the first swing mechanism, and the second swing mechanism are adjusted to move the first drilling rig 10 and the second drilling rig 11 to the vicinity of the position where support is required. The width adjustment mechanism is adjusted to make the distance between the first drilling rig 10 and the second drilling rig 11 equal to the actual distance between the anchors in the well, and the second swing mechanism and the leveling mechanism are adjusted to make the first drilling rig 10 and the second drilling rig 11 to accurately locate the eye.

[0050] When performing the anchor bolt operation, adjust the lifting mechanism, the first swing mechanism, and the second swing mechanism to move the first drill rig 10 and the second drill rig 11 to the vicinity of the position requiring support, and adjust the first swing mechanism, the second swing mechanism and the leveling mechanism to enable the first drill rig 10 and the second drill rig 11 to accurately find the eye and position.

[0051] After the support operation is completed, adjust the leveling mechanism to make the operating platform 16 parallel to the base arm 19, control the retraction of the telescopic arm 18, the base 22, and the track 23, and retreat the airborne drilling system 7 to the rear side of the turntable. Finally, support the base arm 19 on the track 23, retract the temporary support mechanism 6, and complete the operation.

[0052] The control mode of the airborne drilling system 7 can be either electro-hydraulic control or manual control.

[0053] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned 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 cantilever anchor miner, comprising a cutting unit, a frame, a loading unit, a scraper conveyor, a traveling unit, a temporary support mechanism, a hydraulic system and an electrical system; The cutting part is hinged to the rotating table of the frame; The loading part is hinged to the front end of the frame; The scraper conveyor is located in the middle of the machine, with the front end hinged to the frame and the loading part, and the rear part supported on the frame; The walking parts are symmetrically arranged on both sides of the frame; The temporary support mechanism is installed on the upper part of the cutting part; It is characterized in that An airborne drilling system is slidably arranged on the guard plate of the walking part, and the airborne drilling system is driven by the drilling propulsion mechanism to move back and forth in a straight line along the guard plate; The airborne drilling rig system includes a first drilling frame, a second drilling frame, a first swing mechanism, a second swing mechanism, a connecting plate, a width adjustment mechanism, an operating platform, a leveling mechanism, a telescopic arm, a base arm, a lifting mechanism, a slewing mechanism, a base and a slide rail; The slide rail is slidably matched with the guard plate of the walking part; The base is slidably arranged on the slide rail and is driven by the base propulsion mechanism to move back and forth along the slide rail in a straight line; The rear end of the base arm is hinged to the base and can swing up and down and left and right. A lifting mechanism and a rotating mechanism are installed between the base arm and the base. The lifting mechanism is used to control the up and down swing of the base arm, and the rotating mechanism is used to control the left and right swing of the base arm. The telescopic arm is inserted from the front end of the base arm, and a telescopic mechanism for controlling the telescopic arm to be extended or retracted is installed between the base arm and the telescopic arm; The operating platform and the telescopic arm are hinged, and a leveling mechanism is installed between the operating platform and the telescopic arm, and the leveling mechanism is used to adjust the angle between the operating platform and the telescopic arm; The first swing mechanism is mounted on the operating platform, and the swing interface is vertically connected to the second swing mechanism; The connecting plate is a T-shaped plate or an L-shaped plate rotated by 90°; The swing interface of the second swing mechanism is connected to the horizontal plate of the connecting plate; The first drilling frame is connected to the vertical plate of the connecting plate; The second drill frame and the connecting plate are connected via a width adjustment mechanism, and the width adjustment mechanism is used to adjust the distance between the second drill frame and the first drill frame; The first drilling frame and the second drilling frame are parallel to the operating platform; When the cantilever anchor miner performs cutting operations, the base retreats to the rear end of the slide rail, the slewing mechanism rotates inward to close the base arm, the second swing mechanism rotates so that the first drilling rig and the second drilling rig are located in front of and behind the second swing mechanism respectively, and the airborne drilling rig system is located at the rear side of the slewing table; When the cantilever bolter is performing support operations, the cutting blasting head lands in the middle and the temporary support mechanism is deployed; First, the top anchor support operation is carried out. The lifting mechanism controls the base arm to rise, the slewing mechanism controls the base arm to swing outward, the base moves forward, the telescopic arm extends, the first drilling rig and the second drilling rig are moved to the head, the lifting mechanism, the first swing mechanism, and the second swing mechanism are adjusted, the first drilling rig and the second drilling rig are moved to the vicinity of the position requiring support, the width adjustment mechanism is adjusted so that the distance between the first drilling rig and the second drilling rig is the actual distance between the anchors in the well, the second swing mechanism and the leveling mechanism are adjusted so that the first drilling rig and the second drilling rig can be accurately positioned; When performing the anchor bolt operation, adjust the lifting mechanism, the first swing mechanism, and the second swing mechanism, move the first drill rig and the second drill rig to the vicinity of the position requiring support, adjust the first swing mechanism, the second swing mechanism and the leveling mechanism, and allow the first drill rig and the second drill rig to accurately find the eye and position.

2. The cantilever bolter miner according to claim 1, characterized in that: The guard plate of the walking part and the base are both provided with slide rail clamps, which cooperate with the slide rails.

3. The cantilever bolter miner according to claim 2, characterized in that: The drilling rig propulsion mechanism is a propulsion cylinder; The base propulsion mechanism comprises a motor arranged on the base, a reducer connected to the motor, a gear connected to the reducer, and a rack arranged on the slide rail; the gear is meshed with the rack.

4. The cantilever bolter miner according to claim 3, characterized in that: The lifting mechanism is a lifting cylinder, and the slewing mechanism is a slewing cylinder; Three groups of first articulated seats are arranged on the base, the first articulated seats are articulated with second articulated seats through vertical articulated shafts, and the second articulated seats are articulated with the base arm, the cylinder body of the lifting cylinder and the cylinder body of the rotary cylinder respectively through horizontal articulated shafts; The piston of the lifting cylinder is hinged to the base arm through a horizontal hinge shaft; The piston of the rotary cylinder is hinged to the base arm through a horizontal hinge shaft.

5. The cantilever bolter miner according to claim 4, characterized in that: The leveling mechanism is a leveling cylinder, and both ends of the leveling cylinder are respectively hinged to the operating platform and the telescopic arm through horizontal hinge shafts.

6. The cantilever bolter miner according to claim 5, characterized in that: The first swing mechanism is a first swing cylinder, and the second swing mechanism is a second swing cylinder; The first swing oil cylinder is arranged horizontally, the second swing oil cylinder is arranged vertically, and the first swing oil cylinder and the second swing oil cylinder are arranged coaxially.

7. The cantilever bolter miner according to claim 6, characterized in that: The width-adjusting mechanism is a width-adjusting oil cylinder, and two ends of the width-adjusting oil cylinder are respectively connected to the second drilling frame and the connecting plate.

8. The cantilever bolter miner according to claim 1, characterized in that: The pump station, oil tank and motor of the hydraulic system adopt an integrated design and are connected to the rear of the frame by high-strength bolts; the electric control box of the electrical system is arranged on the upper side of the oil tank.

Images