An anti-rollover control system for mountain construction drilling rigs

Abstract

The present invention relates to the technical field of mountain construction drilling rig control systems, and in particular to an anti-rollover control system for mountain construction drilling rigs, the anti-rollover control system for mountain construction drilling rigs comprising a main frame, the lower ends of both sides of the main frame are symmetrically fixedly connected with angle cylinders, the lower ends of the angle cylinders are fixedly connected with cross beams, the rear side of the main frame is fixedly connected with a bracket, the upper end of the bracket is fixedly connected with a transmission shaft, one side of the transmission shaft is a transmission port that can be connected to an external power source, the lower end of the transmission shaft is fixedly connected with a transmission rod, the two sides and the rear side of the cross beam are symmetrically fixedly connected with rotating joints, the rotating joints are inverted L-shaped, the outer ends of the rotating joints are fixedly connected with supporting legs, and the upper ends of the supporting legs are fixedly connected to the cross beam through supporting leg cylinders. The anti-rollover control system for mountain construction drilling rigs provided by the present invention has the advantage of being able to monitor the stability of the construction drilling rig through an angular displacement sensor in cooperation with a pressure sensor, and then adjusting the balance of the drilling rig through the bracket cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of control systems for mountain construction drilling rigs, and in particular to an anti-rollover control system for mountain construction drilling rigs. Background Art

[0002] During the construction of power lines, anchor bolts are sometimes used to fix the foundation of the pole tower according to different geological conditions. At this time, a mountain construction drill is needed to perform drilling operations. During mountain construction, the terrain is complex and the ground is uneven. In some places, the foundation is relatively soft. When drilling, the outrigger mechanism is used to support the ground to improve the stability of the whole machine. However, as the drilling depth increases, the propulsion force of the whole machine increases, and the verticality of the drill hole will shift, resulting in uneven force on the four outriggers. For soft ground, the outriggers with large forces will gradually sink from the ground. When the outrigger mechanism exceeds the support range, the drilling rig is very likely to tip over, further increasing the risk factor for construction safety. In order to improve the safety of construction operations and protect the safety of construction personnel during operations, the existing technology adds counterweights to the drilling rig body to prevent the whole machine from tipping over, and lays steel plates at the bottom of the outriggers to prevent the soft ground from sinking during construction. This brings great inconvenience to mountain construction operations and is not suitable for large-scale operations. In addition, the upper end of the drill rod at the lower end of the existing mountain construction drilling rig control system is usually not equipped with a protective structure. When the drill rod drills into hard objects such as stones, it will pop out and damage the machine and pose a threat to the operator. After the drilling operation is completed, it is necessary to wait for the transmission shaft at the upper end of the drill rod to slow down before the machine can be moved, which greatly affects work efficiency.

[0003] Therefore, it is necessary to provide a new anti-rollover control system for mountain construction drilling rigs to solve the above-mentioned technical problems. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an anti-rollover control system for a mountain construction drilling rig.

[0005] The anti-rollover control system for a mountain construction drilling rig provided by the present invention comprises:

[0006] The main frame, the lower ends of both sides of the main frame are symmetrically fixedly connected with angle cylinders, the lower ends of the angle cylinders are fixedly connected with crossbeams, the rear side of the main frame is fixedly connected with a bracket, the upper end of the bracket is fixedly connected with a transmission shaft, one side of the transmission shaft is a transmission port that can be connected to an external power source, and the lower end of the transmission shaft is fixedly connected with a transmission rod;

[0007] The support cylinder, both sides and the rear side of the crossbeam are symmetrically fixedly connected to the rotating joint, the rotating joint is an inverted L-shaped, the outer end of the rotating joint is fixedly connected with a support foot, the upper end of the support foot is fixedly connected to the crossbeam through the support foot cylinder, and one side of the lower end of the crossbeam is fixedly connected with a single-chip control system;

[0008] The protection plate, the inner sides of both sides of the lower end of the crossbeam are symmetrically fixedly connected with spring rods, the lower ends of the spring rods are fixedly connected with the protection plate, and an opening is opened at the inner center of the protection plate, and the opening is surrounded by the outer side of the connecting plate;

[0009] A reduction wheel, a reduction frame is fixedly connected to the upper end of the main frame, reduction wheels are embedded in both sides of the reduction frame and are symmetrically rotatably connected, the inner edge of the reduction wheel is surrounded by the two side edges of the lower end of the transmission rod, the upper end of the reduction wheel passes through the reduction frame to the upper end where a brake shaft is fixedly connected, brakes are symmetrically fixedly connected to both sides of the upper end of the reduction frame, and the inner braking end of the brake is movably connected to the brake shaft.

[0010] Preferably, an adjustment shaft is movably connected at the center of the support leg, and multiple groups of fixing holes are opened from one side of the upper end of the support leg to the other side. The interior of the adjustment shaft is a bolt structure that passes through the fixing holes opened on the support leg. The length of the support leg can be adjusted by setting the adjustment shaft.

[0011] Preferably, a single-chip control system is fixedly connected to the lower end of the crossbeam, and each electronic component can be operated intuitively through the single-chip control system.

[0012] Preferably, a sound and light alarm is fixedly connected to one side of the upper end of the beam, and a warning can be issued by the sound and light alarm to remind the operator.

[0013] Preferably, the lower end of the transmission rod passes through the cross beam and is fixedly connected to a connecting plate at the lower end. The connecting plate is a quadrilateral plate with mounting holes at four diagonals, and the drill rod can be connected through the connecting plate.

[0014] Preferably, a drill rod is fixedly connected to the lower end of the connecting plate. The drill rod is a long cylindrical drill bit, and holes can be drilled into the ground through the provided drill rod.

[0015] Preferably, a cable is provided on one side of the upper end of the bracket, and the interior of the cable is a combination of multiple lines, and the multiple lines are connected to the controller on the outside through the provided cable.

[0016] Preferably, the angle cylinder, the support leg cylinder, the single-chip control system, the sound and light alarm, the brake, the pressure sensor and the angular displacement sensor are electrically connected through wires and cables, and the power and the controller can be transmitted to each electronic component through the provided wires.

[0017] Compared with the related art, the anti-rollover control system for mountain construction drilling rigs provided by the present invention has the following beneficial effects:

[0018] The present invention provides an anti-rollover control system for a mountain construction drilling rig;

[0019] 1. The present invention can monitor and operate the stability of the construction drill rig through the angular displacement sensor and the pressure sensor. When the mountain construction drill rig is fixed at the drilling position for drilling, the pressure on the support leg can be monitored by the pressure sensor, and the angle of the mountain construction drill rig can be detected by the angular displacement sensor. If the pressure and the angle of the mountain construction drill rig are offset, a control signal can be sent to the support leg cylinder and the angle cylinder through the single-chip control system. The support leg is extended to drive the support leg to adjust the height with the ground, and the angle cylinder is extended to drive the main frame to adjust the height with the beam. Angle and center of gravity, and sound and light alarms are issued through sound and light alarms. When the center of gravity and pressure return to normal, a control signal is sent to the support leg cylinder through the single-chip control system, and the support leg cylinder stops extending to fix the position of the mountain construction drill rig, thereby realizing the adjustment of the center of gravity and angle of the mountain construction drill rig to adapt to different terrain environments. If the mountain construction drill rig cannot adapt to the terrain through the support leg cylinder and the angle cylinder, when the center of gravity reaches the shutdown value, the drill rig shuts down the outer engine and stops operating, and the mountain construction drill rig is shut down urgently, thereby solving the risk of the whole machine tipping over during mountain construction.

[0020] 2. The present invention can drill holes in the ground through the provided drill rod. After the mountain construction drill rig is fixed at the drilling position, the power source outside can be controlled by operating the controller outside to drive the transmission shaft to rotate, drive the lower end of the transmission shaft to rotate synchronously, drive the rotating rod to rotate, drive the lower end of the rotating rod to pass through the cross beam to the connecting plate fixedly connected to the lower end to rotate, and drive the drill rod fixedly connected to the lower end of the connecting plate to drill holes in the ground;

[0021] 3. The present invention can protect the lower end of the mountain construction drill from damage by means of a protective plate. When the mountain construction drill is fixed at the drilling position for drilling, the protective plate fixedly connected to the lower end of the spring rod can be used to block stones splashed from the drill rod during the drilling operation, thereby preventing the lower end parts of the mountain construction drill from being damaged and the operator at the edge from being injured.

[0022] 4. The present invention can decelerate the rotating shaft by means of the arranged reduction wheel. When the mountain construction drilling rig is fixed at the drilling position and the drilling operation is completed, the inner braking end of the brake can be controlled by operating the outer controller to brake the brake shaft rotating at the upper end of the reduction wheel, thereby driving the reduction wheel to decelerate, and driving the transmission rod movably connected inside the reduction wheel to slow down the rotation speed, thereby achieving deceleration of the rotating rod to facilitate subsequent drilling operations at other positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram of the overall structure of the anti-rollover control system for a mountain construction drilling rig provided by the present invention;

[0024] Figure 2 for Figure 1 The enlarged structural schematic diagram of A shown;

[0025] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at B shown.

[0026] Numbers in the figure: 1. Main frame; 2. Angle cylinder; 3. Crossbeam; 4. Support leg cylinder; 5. Support leg; 6. Connecting plate; 7. Drill rod; 8. Spring rod; 9. Protective plate; 10. Wire; 11. Cable; 12. Adjusting shaft; 13. Bracket; 14. Transmission shaft; 15. Transmission rod; 16. Single-chip control system; 17. Sound and light alarm; 18. Rotating joint; 19. Speed ​​reduction frame; 20. Speed ​​reduction wheel; 21. Brake; 22. Brake shaft; 23. Pressure sensor; 24. Angular displacement sensor. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0029] See also Figures 1 to 3 The embodiment of the present invention provides an anti-rollover control system for a mountain construction drilling rig, and the anti-rollover control system for a mountain construction drilling rig includes:

[0030] The main frame 1 has an angle cylinder 2 symmetrically fixedly connected to the lower ends of both sides of the main frame 1, and a crossbeam 3 is fixedly connected to the lower ends of the angle cylinder 2. A bracket 13 is fixedly connected to the rear side of the main frame 1, and a transmission shaft 14 is fixedly connected to the upper end of the bracket 13. One side of the transmission shaft 14 is a transmission port that can be connected to an external power source, and a transmission rod 15 is fixedly connected to the lower end of the transmission shaft 14;

[0031] The support cylinder 4 is symmetrically fixedly connected to the rotating joint 18 on both sides and the rear side of the cross beam 3. The rotating joint 18 is an inverted L shape. The outer end of the rotating joint 18 is fixedly connected to the support leg 5. The upper end of the support leg 5 is fixedly connected to the cross beam 3 through the support leg cylinder 4. The lower end of the cross beam 3 is fixedly connected to the single-chip control system 16.

[0032] The protective plate 9, the inner sides of the lower ends of the two sides of the cross beam 3 are symmetrically fixedly connected with spring rods 8, the lower ends of the spring rods 8 are fixedly connected with the protective plate 9, and an opening is opened at the inner center of the protective plate 9, and the opening surrounds the outer side of the connecting plate 6;

[0033] The reduction wheel 20 is fixedly connected to the upper end of the main frame 1 with a reduction frame 19, and the reduction wheels 20 are embedded in both sides of the reduction frame 19 and are symmetrically rotatably connected. The inner edge of the reduction wheel 20 surrounds the two side edges of the lower end of the transmission rod 15, and the upper end of the reduction wheel 20 passes through the reduction frame 19 to the upper end where a brake shaft 22 is fixedly connected. The brakes 21 are symmetrically fixedly connected to both sides of the upper end of the reduction frame 19, and the inner braking end of the brake 21 is movably connected to the brake shaft 22.

[0034] It should be noted that: when the mountain construction drill rig is fixed at the drilling position for drilling operations, the pressure on the support leg 5 can be monitored by the pressure sensor, and the angular displacement sensor 24 can be used to detect whether the angle of the mountain construction drill rig is offset. If the pressure and the angle of the mountain construction drill rig are offset, a control signal can be sent to the support leg cylinder 4 and the angle cylinder 2 through the single-chip control system 16. The support leg cylinder 4 is extended to drive the support leg 5 to adjust the height with the ground, and the angle cylinder 2 is extended to drive the main frame 1 to adjust the angle and center of gravity with the beam 3, and through The sound and light alarm 17 sends out a sound and light alarm. When the center of gravity and pressure return to normal, a control signal will be sent to the support leg cylinder 4 through the single-chip control system 16. The support leg cylinder 4 stops extending and fixes the position of the mountain construction drill rig, thereby realizing the adjustment of the center of gravity and angle of the mountain construction drill rig to adapt to different terrain environments. If the mountain construction drill rig cannot adapt to the terrain through the support leg cylinder 4 and the angle cylinder 2, when the center of gravity reaches the shutdown value, the drill rig shuts down the outer engine and stops operating, and the mountain construction drill rig is shut down urgently, thereby solving the problem of mountain construction. In order to prevent the danger of the whole machine tipping over during the process, after the mountain construction drilling rig is fixed at the drilling position, the power source on the outside can be controlled by operating the controller on the outside to drive the transmission shaft 14 to rotate, drive the lower end of the transmission shaft 14 to rotate synchronously, drive the rotating rod 15 to rotate, drive the lower end of the rotating rod 15 to pass through the cross beam 3 to the connecting plate 6 fixedly connected at the lower end to rotate, drive the drill rod 7 fixedly connected to the lower end of the connecting plate 6 to drill a hole in the ground, and when the mountain construction drilling rig is fixed at the drilling position for drilling operations, the protective plate fixedly connected to the lower end of the spring 8 can be used. 9 blocks the stones splashed out by the drill rod 7 during the drilling operation, thereby preventing the lower end parts of the mountain construction drill rig from being damaged and the operator at the edge from being injured. After the drilling operation is completed when the mountain construction drill rig is fixed at the drilling position, the inner braking end of the brake 21 can be controlled by operating the outer controller to brake the brake shaft 22 rotating at the upper end of the reduction wheel 20, driving the reduction wheel 20 to slow down, and driving the transmission rod 15 movably connected to the inner side of the reduction wheel 20 to slow down the rotation speed, thereby achieving the deceleration of the rotating rod to facilitate subsequent drilling operations at other positions.

[0035] In the embodiments of the present invention, please refer to Figure 1 and Figure 3An adjusting shaft 12 is movably connected at the center of the supporting leg 5, and multiple sets of fixing holes are opened from one side to the other side of the upper end of the supporting leg 5. The interior of the adjusting shaft 12 is a bolt structure that penetrates the fixing holes opened on the supporting leg 5. The length of the supporting leg 5 can be adjusted by setting the adjusting shaft 12.

[0036] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 The lower end of the crossbeam 3 is fixedly connected with a single-chip control system 16, and each electronic component can be operated intuitively through the single-chip control system 16.

[0037] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 A sound and light alarm 17 is fixedly connected to one side of the upper end of the crossbeam 3, and the sound and light alarm 17 can issue a warning to remind the operator.

[0038] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 The lower end of the transmission rod 15 passes through the cross beam 3 and is fixedly connected to the lower end with a connecting plate 6. The connecting plate 6 is a quadrilateral plate with mounting holes at four diagonals. The drill rod 7 can be connected through the connecting plate 6.

[0039] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 The lower end of the connecting plate 6 is fixedly connected with a drill rod 7, which is a long cylindrical drill bit. The drill rod 7 can be used to drill holes in the ground.

[0040] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 A cable 11 is arranged on one side of the upper end of the bracket 13. The interior of the cable 11 is a combination of multiple lines. The multiple lines are connected to the controller outside through the arranged cable 11.

[0041] In the embodiments of the present invention, please refer to Figure 1 and Figure 3 , the angle cylinder 2, the support leg cylinder 4, the single-chip control system 16, the sound and light alarm 17, the brake 21, the pressure sensor 23 and the angular displacement sensor 24 are electrically connected through wires and cables, and the power and the controller can be transmitted to each electronic component through the set wires.

[0042] The working principle of the anti-rollover control system for mountain construction drilling rigs provided by the present invention is as follows:

[0043] When in use, first connect the external controller via cable 11. When the mountain construction drill is fixed at the drilling position for drilling, the pressure on the support leg 5 can be monitored by the pressure sensor, and the angle displacement sensor 24 can be used to detect whether the angle of the mountain construction drill is offset. The center of gravity calculation formula is: the center of gravity of the fixed part is G0 (X0, Y0), and the center of gravity of the moving part is G1 (X1, Y1). Then the center of gravity G (X, Y) of the whole vehicle is Among them, α is the lateral inclination angle of the drilling rig measured by the angle sensor, and β is the longitudinal inclination angle of the drilling rig measured by the angle sensor. f1, f2, f3, and f4 are the pressures on the front and rear legs measured by the pressure sensor. f5 is the pressure of the drill rod measured by the pressure sensor. After the single-chip computer system calculates the position of the center of gravity G (X, Y) of the drilling rig, it checks whether its center of gravity reaches the target threshold. and The first threshold is not reached. At this time, the center of gravity is stable and there is no danger. The drilling rig continues to operate normally. or and or When the first threshold is reached but the second threshold is not reached, the single-chip computer system issues a control command to further extend the outrigger cylinder of the mountain construction drilling rig to provide ground support, and issues an alarm signal (sound and light alarm) to remind the operator to pay attention and take necessary measures. or or or The second threshold has been reached, and the center of gravity has reached the shutdown value. The single-chip computer system issues a control command to shut down the engine and stop the operation, thereby ensuring the safety of the entire machine and preventing rollover accidents. In the formula, a is the distance between the front and rear legs; b is the distance between the left and right legs. After each threshold detection and feedback, the single-chip computer data is reset to zero to avoid affecting the next threshold detection. If the pressure and the angle of the mountain construction drilling rig are offset, a control signal can be sent to the support leg cylinder 4 and the angle cylinder 2 through the single-chip control system 16. The support leg cylinder 4 extends to drive the support leg 5 to adjust the height from the ground. The angle cylinder 2 is extended and retracted to drive the main frame 1 to adjust the angle and center of gravity with the crossbeam 3, and an audible and visual alarm is issued through the audible and visual alarm 17. When the center of gravity and pressure return to normal, a control signal will be sent to the support leg cylinder 4 through the single-chip control system 16, and the support leg cylinder 4 will stop extending to fix the position of the mountain construction drilling rig, thereby realizing the adjustment of the center of gravity and angle of the mountain construction drilling rig to adapt to different terrain environments. If the mountain construction drilling rig cannot adapt to the terrain through the support leg cylinder 4 and the angle cylinder 2, when the center of gravity reaches the shutdown value, the drilling rig will shut down the outer engine and stop operating, and the mountain construction drilling rig will be The emergency shutdown is performed, thereby solving the danger of the whole machine tipping over during mountain construction. After the mountain construction drilling rig is fixed at the drilling position, the outer power source can be controlled by operating the outer controller to drive the transmission shaft 14 to rotate, drive the lower end of the transmission shaft 14 to rotate synchronously, drive the rotating rod 15 to rotate, drive the lower end of the rotating rod 15 to penetrate the cross beam 3 to the lower end of the fixedly connected connecting plate 6 to rotate, drive the drill rod 7 fixedly connected to the lower end of the connecting plate 6 to drill the ground. When the mountain construction drilling rig is fixed at the drilling position for drilling operations, the spring 8 rod can be used to control the outer power source to drive the transmission shaft 14 to rotate synchronously, drive the lower end of the rotating rod 15 ... drill rod 7 fixedly connected to the lower end of the connecting plate 6 to drill the ground. The protective plate 9 fixedly connected at the lower end blocks the stones splashed by the drill rod 7 during the drilling operation, thereby preventing the lower end parts of the mountain construction drill rig from being damaged and the operator at the edge from being injured. After the drilling operation is completed when the mountain construction drill rig is fixed at the drilling position, the inner braking end of the brake 21 can be controlled by operating the outer controller to brake the brake shaft 22 rotating at the upper end of the reduction wheel 20, thereby driving the reduction wheel 20 to slow down, and driving the transmission rod 15 movably connected to the inner side of the reduction wheel 20 to slow down the rotation speed, thereby achieving deceleration of the rotating rod to facilitate subsequent drilling operations at other positions.

[0044] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An anti-rollover control system for a mountain construction drilling rig, characterized in that: include: A main frame (1), wherein the lower ends of both sides of the main frame (1) are symmetrically fixedly connected with angle cylinders (2), the lower ends of the angle cylinders (2) are fixedly connected with crossbeams (3), the rear side of the main frame (1) is fixedly connected with a bracket (13), the upper end of the bracket (13) is fixedly connected with a transmission shaft (14), one side of the transmission shaft (14) is a transmission port that can be connected to an external power source, and the lower end of the transmission shaft (14) is fixedly connected with a transmission rod (15); The support cylinder (4) is symmetrically fixedly connected to a rotating joint (18) on both sides and the rear side of the cross beam (3); the rotating joint (18) is in an inverted L shape; the outer end of the rotating joint (18) is fixedly connected to a support foot (5); the upper end of the support foot (5) is fixedly connected to the cross beam (3) through the support foot cylinder (4); and the lower end of the cross beam (3) is fixedly connected to a single-chip control system (16); A protection plate (9), wherein spring rods (8) are symmetrically fixedly connected to the inner sides of both sides of the lower end of the cross beam (3), and the lower ends of the spring rods (8) are fixedly connected to the protection plate (9), and an opening is opened at the inner center of the protection plate (9), and the opening surrounds the outer side of the connecting plate (6); A reduction wheel (20), the upper end of the main frame (1) is fixedly connected to a reduction frame (19), the two sides of the reduction frame (19) are embedded with reduction wheels (20) and symmetrically rotatably connected, the inner edge of the reduction wheel (20) surrounds the two side edges of the lower end of the transmission rod (15), the upper end of the reduction wheel (20) passes through the reduction frame (19) to the upper end fixedly connected to a brake shaft (22), the two sides of the upper end of the reduction frame (19) are symmetrically fixedly connected to brakes (21), and the inner braking end of the brake (21) is movably connected to the brake shaft (22).

2. The anti-rollover control system for a mountain construction drilling rig according to claim 1, characterized in that: An adjusting shaft (12) is movably connected at the center of the supporting foot (5), and a plurality of fixing holes are provided from one side of the upper end of the supporting foot (5) to the other side. The interior of the adjusting shaft (12) is a bolt structure penetrating the fixing holes provided on the supporting foot (5).

3. The anti-rollover control system for a mountain construction drilling rig according to claim 1, characterized in that: A pressure sensor (23) is fixedly connected to the center of the outer side of the support foot (5), and an angular displacement sensor (24) is fixedly connected to the other side of the lower end of the crossbeam (3).

4. The anti-rollover control system for a mountain construction drilling rig according to claim 1, characterized in that: An audible and visual alarm (17) is fixedly connected to one side of the upper end of the crossbeam (3).

5. The anti-rollover control system for a mountain construction drilling rig according to claim 1, characterized in that: The lower end of the transmission rod (15) passes through the cross beam (3) and is fixedly connected to a connecting plate (6) at the lower end. The connecting plate (6) is a quadrilateral plate with mounting holes at four diagonal angles.

6. The anti-rollover control system for a mountain construction drilling rig according to claim 5, characterized in that: The lower end of the connecting plate (6) is fixedly connected with a drill rod (7), and the drill rod (7) is a long cylindrical drill bit.

7. The anti-rollover control system for a mountain construction drilling rig according to claim 1, characterized in that: A cable (11) is arranged on one side of the upper end of the bracket (13), and the interior of the cable (11) is a combination of multiple lines.

8. The anti-rollover control system for a mountain construction drilling rig according to claim 7, characterized in that: The angle cylinder (2), the support leg cylinder (4), the single-chip control system (16), the sound and light alarm (17), the brake (21), the pressure sensor (23) and the angular displacement sensor (24) are electrically connected to the cable (11) via the wire (10).

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