Dual warning arm-raising electric shovel and warning method

Abstract

The application provides a double early-warning big arm lifting electric shovel and an early-warning method, which comprises a displacement angle monitoring device, which comprises a fixed connecting rod, an upper end of which is connected with a rod body of a hinged ball and is fixed to a big arm; the big arm is installed on a side of a working chamber through a hinged shaft; a movable connecting rod, an upper end of which is connected with another rod body of the hinged ball and a lower end of which is connected with a sliding block; the sliding block penetrates through a fixed sliding rod; one end of the fixed sliding rod is a fixed part which is fixed to the hinged shaft; an angle sensor which is fixed to the fixed connecting rod; and a displacement sensor which is fixed on the fixed sliding rod and makes a measuring rod at a front end of the displacement sensor contact with the sliding block. The application can monitor the sudden condition of the big arm lifting when the electric shovel encounters a hard obstacle during tunneling, and can effectively detect the rotating angle and displacement of the big arm in real time.

Description

Technical Field

[0001] This invention belongs to the field of automatic protection of mechanical devices of electric shovels, specifically relating to a dual-warning boom-lifting electric shovel and a warning method. Background Technology

[0002] Electric shovels, also known as mechanical excavators, are one of the main pieces of equipment in open-pit coal mining, boasting advantages such as high production efficiency and ease of operation. However, during operation, when excavating into hard rock layers, the boom can lift under sustained pressure, potentially leading to accidents. Accurately monitoring and issuing early warnings about boom lifting, allowing operators to appropriately suspend operations, is a pressing issue that needs to be addressed. Summary of the Invention

[0003] The purpose of this invention is to provide a dual-warning boom-lifting electric shovel and a warning method, which can monitor the sudden situation of the boom lifting when the shovel encounters a hard obstacle during excavation, and can effectively detect the boom rotation angle and displacement in real time. To achieve the above objective, the technical solution adopted is as follows:

[0004] A dual-warning boom-lifting electric shovel includes: a displacement angle monitoring device 9, which includes:

[0005] The fixed connecting rod 11 is connected at its upper end to one of the rods of the hinge ball 12 and fixed to the upper arm; the upper arm is installed on the side of the working chamber 2 via a hinge shaft.

[0006] The upper end of the movable link 13 is connected to another rod of the hinge ball 12, and the lower end is connected to the slider 14;

[0007] The slider 14 passes through the fixed slide bar 15; one end of the fixed slide bar 15 is a fixed part 151, which is fixed to the hinge shaft.

[0008] Angle sensor 10 is fixed to the fixed connecting rod 11;

[0009] And displacement sensor 16, which is fixed on fixed slide bar 15 and makes the measuring rod at the front end of displacement sensor 16 contact slider 14.

[0010] Preferably, it further includes: boom structure 8, which includes: left boom 19, left rack boom connecting frame 20, left forearm 21, left pulley 22, right pulley 23, right forearm 24, right rack boom connecting frame 25 and right boom 26;

[0011] The left and right upper arms 19 and 26 are mounted on the side of the working chamber 2 via hinge shafts;

[0012] The left forearm 21 is connected to the middle part of the left upper arm 19 via the left rack arm connector 20; the right forearm 24 is connected to the middle part of the right upper arm 26 via the right rack arm connector 25.

[0013] The bucket 7 is connected to the left forearm 21 and the right forearm 24 via shaft holes.

[0014] Preferably, it further includes: a transmission structure, which includes a wire rope bracket A3, a wire rope bracket B4, a wire rope A5, and a wire rope B6;

[0015] One end of the wire rope A5 is fixed to the upper end of the boom, and the other end is connected to the wire rope bracket B4 and the rope is wound up and unwound by the internal winch.

[0016] One end of the wire rope B6 is fixed to the upper part of the bucket 7 and passes over the left pulley 22 and the right pulley 23. The other end is connected to the wire rope bracket A3 and the rope is wound up and released by the internal winch.

[0017] A dual early warning method includes the following steps:

[0018] When the bucket 7 encounters hard material, it will lift the left 19 and right 26 of the boom backward. When the displacement angle monitoring device 9 exceeds the warning value, the external terminal 17 will issue a warning and terminate the operation.

[0019] Among them, the upper arm is lifted upward and rotates around the hinge axis. The fixed link 11 rotates with the upper arm. The fixed link 11 drives the movable link 13 to rotate. The movable link 13 pulls the slider 14 to move horizontally on the fixed slide bar 15.

[0020] As the fixed connecting rod 11 rotates with the boom, the angle sensor 10 measures the angle rotated in real time.

[0021] Meanwhile, as the slider 14 moves horizontally toward the displacement sensor 16, the displacement sensor 16 sends a displacement signal in real time.

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] It can monitor sudden situations where the boom lifts up when the electric shovel encounters hard obstacles during excavation. It can effectively detect the boom rotation angle and displacement in real time, thereby monitoring whether the boom of the electric shovel deviates during operation and avoiding engineering accidents. Attached Figure Description

[0024] Figure 1 This is a structural diagram of a dual-warning boom-lifting electric shovel.

[0025] Figure 2 This is a structural diagram of the displacement angle detection device.

[0026] Figure 3 This is a schematic diagram of the boom structure.

[0027] Figure 4 This is a schematic diagram of the installation of the displacement angle detection device.

[0028] Figure 5 This is a schematic diagram of an electric shovel operation.

[0029] In the diagram: 1. Sprocket; 2. Working chamber; 3. Wire rope support A; 4. Wire rope support B; 5. Wire rope A; 6. Wire rope B;

[0030] 7. Bucket; 8. Boom structure;

[0031] 9. Displacement angle monitoring device;

[0032] 10. Angle sensor; 11. Fixed link; 12. Hinge ball; 13. Movable link; 14. Slider;

[0033] 15. Fixed slide bar; 151. Fixing part; 16. End displacement sensor; 17. Peripheral terminal; 18. Protective cover;

[0034] 19. Left side of the upper arm; 20. Left side of the rack and pinion arm connector; 21. Left side of the forearm; 22. Left side of the pulley;

[0035] 23. Right pulley; 24. Right forearm; 25. Right rack and pinion connector; 26. Right upper arm. Detailed Implementation

[0036] The dual-warning boom-lifting electric shovel and its warning method of the present invention will be described in more detail below with reference to the schematic diagrams, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0037] like Figures 1-5 The dual-warning boom-lifting electric shovel consists of a sprocket 1, a working chamber 2, a transmission structure, a displacement angle monitoring device 9, and a boom structure 8. Its arrangement is as follows: the working chamber is supported by two sprockets and a platform, while the bottom of the boom is hinged to the side of the working chamber.

[0038] The transmission structure includes: wire rope bracket A3, wire rope bracket B4, wire rope A5, and wire rope B6.

[0039] The boom structure 8 is existing technology and includes: left boom 19, left rack boom connecting frame 20, left forearm 21, left pulley 22, right pulley 23, right forearm 24, right rack boom connecting frame 25, and right boom 26.

[0040] Studio 2 is mounted on sprocket 1 via its bottom platform;

[0041] The left and right upper arms 19 and 26 are mounted on the side of the working chamber 2 via hinge shafts;

[0042] The left forearm 21 is connected to the middle part of the left upper arm 19 via the left rack arm connector 20; the right forearm 24 is connected to the middle part of the right upper arm 26 via the right rack arm connector 25. The left rack arm connector 20 and the right rack arm connector 25 are fixed to their respective upper arms.

[0043] Specifically, taking the left forearm 21 and the left rack arm connector 20 as an example: the left forearm 21 and the left rack arm connector 20 are connected by a gear and rack (a rack is installed on the lower surface of the left forearm 21, and a gear is rotatably installed inside the left rack arm connector 20).

[0044] The bucket 7 is connected to the left forearm 21 and the right forearm 24 via shaft holes;

[0045] One end of the wire rope A5 is fixed to the upper ends of the left 19 and right 26 of the boom, and the other end is connected to the wire rope bracket 4 and the rope is wound up and released by the internal winch.

[0046] One end of the wire rope B6 is fixed to the upper part of the bucket 7 and passes over the left pulley 22 and the right pulley 23. The other end is connected to the wire rope bracket A3 and the rope is wound up and released by the internal winch.

[0047] The displacement angle monitoring device 9 is fixed at the right bottom hinge of the boom and is isolated from the external sandy environment by the protective cover 18.

[0048] The displacement angle monitoring device 9 consists of: angle sensor 10, fixed connecting rod 11, hinge ball 12, movable connecting rod 13, slider 14, fixed sliding rod 15, displacement sensor 16, peripheral terminal 17, and protective cover 18.

[0049] like Figure 2 As shown, the angle sensor 10 is fixed to the fixed link 11. The upper end of the fixed link 11 is connected to the hinge ball 12 and fixed to the upper arm (upper arm left 19 or upper arm right 26) to maintain the same rotation angle with the upper arm.

[0050] The upper end of the movable link 13 is connected to the hinge ball 12, and the lower end is connected to the slider 14.

[0051] The slider 14 passes through the fixed slide bar 15 and can slide horizontally as the upper arm rotates.

[0052] One end of the fixed slide rod 15 is a fixed part 151, which is fixed to the hinge shaft on which the upper arm rotates around the working chamber, such as... Figure 4 As shown.

[0053] The displacement sensor 16 is fixed on the fixed slide bar 15 and the measuring rod at the front end of the displacement sensor 16 is in contact with the slider 14.

[0054] When the boom rotates around the hinge axis, the angle sensor 10 can measure the rotation angle and output it to the peripheral terminal 17.

[0055] When the slider 14 moves, the displacement sensor 16 can record the moving distance and output it to the peripheral terminal 17, thereby monitoring whether the boom of the electric shovel deviates during operation to avoid engineering accidents.

[0056] Working principle: When the electric shovel is working, wire ropes A5 and B6 are released, and the bucket 7 is lowered to the designated position. The sprocket 1 drives the whole vehicle forward. If the bucket 7 encounters hard material at this time, it will push the left boom 19 and right boom 26 backward. When the displacement angle monitoring device 9 exceeds the warning value, the external terminal 17 will issue a warning and stop the operation to avoid safety accidents.

[0057] Specifically, the working principle of the displacement angle monitoring device 9 is as follows: the main arm is lifted upward and rotates around the hinge axis. The fixed connecting rod 11 rotates with the main arm. The fixed connecting rod 11 drives the movable connecting rod 13 to rotate. The movable connecting rod 13 pulls the slider 14 to move horizontally on the fixed sliding rod 15.

[0058] As the fixed connecting rod 11 rotates with the boom, the angle sensor 10 measures the angle rotated in real time.

[0059] Meanwhile, as the slider 14 moves horizontally toward the displacement sensor 16, the measuring rod of the displacement sensor 16 retracts and sends a displacement signal in real time.

[0060] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the present invention. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and content disclosed in the present invention without departing from the scope of the present invention shall be deemed to have remained within the protection scope of the present invention.

Claims

1. A dual-warning boom-lifting electric shovel, characterized in that, include: Displacement angle monitoring device (9), comprising: The fixed connecting rod (11) is connected at its upper end to a rod of the hinge ball (12) and fixed to the upper arm; the upper arm is installed on the side of the working chamber (2) through the hinge shaft; The upper end of the movable link (13) is connected to another rod of the hinge ball (12), and the lower end is connected to the slider (14). The slider (14) passes through the fixed slide rod (15); one end of the fixed slide rod (15) is a fixed part (151), which is fixed to the hinge shaft; Angle sensor (10) is fixed to the fixed link (11); And a displacement sensor (16), which is fixed on a fixed slide bar (15) and the measuring rod at the front end of the displacement sensor (16) contacts the slider (14).

2. The dual-warning boom-lifting electric shovel according to claim 1, characterized in that, Also includes: The boom structure (8) includes: left boom (19), left rack boom connecting frame (20), left forearm (21), left pulley (22), right pulley (23), right forearm (24), right rack boom connecting frame (25), and right boom (26). The left (19) and right (26) upper arms are mounted on the side of the working chamber (2) via hinges; The left forearm (21) is connected to the middle part of the left upper arm (19) via the left rack arm connector (20); the right forearm (24) is connected to the middle part of the right upper arm (26) via the right rack arm connector (25); The bucket (7) is connected to the left (21) and right (24) of the forearm via shaft holes.

3. The dual-early warning boom-lifting electric shovel according to claim 2, characterized in that, Also includes: The transmission structure includes a wire rope support A (3), a wire rope support B (4), a wire rope A (5), and a wire rope B (6). One end of the wire rope A (5) is fixed to the upper end of the boom, and the other end is connected to the wire rope bracket B (4) and the rope is wound up and down by the internal winch. One end of the wire rope B (6) is fixed to the upper part of the bucket (7) and passes over the left (22) and right (23) pulleys, while the other end is connected to the wire rope bracket A (3) and the rope is wound up and down by the internal winch.

4. A dual early warning method, characterized in that, Includes the following steps: When the bucket (7) encounters hard material, it will push the left (19) and right (26) booms backward. When the displacement angle monitoring device (9) exceeds the warning value, the external terminal (17) will issue a warning and terminate the operation. Among them, the upper arm is lifted upward and rotates around the hinge axis. The fixed link (11) rotates with the upper arm. The fixed link (11) drives the movable link (13) to rotate. The movable link (13) pulls the slider (14) to move horizontally on the fixed slider (15). During the rotation of the fixed link (11) with the boom, the angle sensor (10) measures the angle rotated in real time; Meanwhile, as the slider (14) moves horizontally toward the displacement sensor (16), the displacement sensor (16) sends a displacement signal in real time.

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