Limiting alarm device for raw coal unloading station

Abstract

A limiting alarm device of a raw coal unloading station comprises a laser distance measuring sensor installed above an unloading port of the raw coal unloading station and an audible and visual alarm installed outside the laser distance measuring sensor, two grooves are formed in the front end of the unloading port of the raw coal unloading station, wheel speed reducing assemblies are installed in the grooves, and deceleration strips are arranged at the front ends of the corresponding wheel speed reducing assemblies. A pressing trigger assembly is arranged in the deceleration strip. The wheel speed reduction assembly, the pressing trigger assembly and the automatic control system are installed in the raw coal unloading station, a series of problems caused by the fact that parking is not conducted in time are fundamentally solved, the risk that a cart falls into a pit opening is better prevented, the life and property safety of drivers and passengers is better guaranteed, and the safety of the drivers and the passengers is improved. And unnecessary economic expenditure of an enterprise is saved.

Description

Technical Field

[0001] The utility model relates to the field of unloading station safety, in particular to a raw coal unloading station limit alarm device. Background Art

[0002] When large trucks are reversing to unload coal, the driver's field of vision behind the vehicle is often limited, which results in great psychological pressure and blindness during operation, making personal injury or cargo damage accidents more likely to occur. Or when other objects appear in front of the driver, he needs to quickly determine whether to slow down, stop, or continue working. The driver is affected by factors such as construction pressure and heavy tasks, and may engage in dangerous behaviors such as slow processing or even incorrect processing. Since novice drivers have poor operating skills, large trucks often fall off the pit mouth, which may seriously endanger the driver's life and property safety, and also cause unnecessary economic expenses to the company. Utility Model Content

[0003] In order to solve the above-mentioned problems, the utility model provides a limit alarm device for a raw coal unloading station.

[0004] The utility model is realized through the following technical solutions:

[0005] A limit alarm device for a raw coal unloading station is characterized in that it includes a laser ranging sensor installed above the unloading port of the raw coal unloading station and an externally installed sound and light alarm, two grooves are provided at the front end of the unloading port of the raw coal unloading station, wheel deceleration assemblies are installed in the grooves, speed reduction belts are provided at the front end of the corresponding wheel deceleration assemblies, and a press trigger assembly is provided in the speed reduction belt.

[0006] Further optionally, the wheel reduction assembly includes a support box in the mounting groove, a cover plate that can slide on the slide rail through an electric cylinder is arranged on the upper part of the support box, and a plurality of one-way rollers are supported inside the support box.

[0007] Further optionally, the combined surface of the plurality of unidirectional rollers is designed to be an arc surface.

[0008] Further optionally, the telescopic rod of the electric cylinder is connected and fixed to the cover plate through a connecting rod.

[0009] Further optionally, the press trigger assembly includes a pressure block arranged in the middle of the speed bump and movably connected, a spring connected and fixed to the bottom surface of the speed bump is arranged at the lower part of the pressure block, a proximity switch is arranged on one side of the pressure block, and an induction iron sheet is arranged directly below the proximity switch.

[0010] Optionally, an automatic control system is also included, which includes a laser distance sensor sound and light alarm, a proximity switch and an electric cylinder, which are electrically connected to the PLC controller respectively.

[0011] Compared with the existing technology, the beneficial effects of the utility model are: the utility model fundamentally solves a series of problems caused by not stopping in time by installing a wheel deceleration component, a press trigger component and an automatic control system at the raw coal unloading station, better prevents the risk of large vehicles falling into the pit, better ensures the safety of life and property of drivers and passengers, and saves the company's unnecessary economic expenditure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 is a schematic cross-sectional view of a press trigger assembly;

[0014] Figure 3 is an enlarged schematic diagram of a wheel deceleration assembly;

[0015] Figure 4 This is a schematic diagram of the wheel deceleration assembly in use;

[0016] In the figure: raw coal unloading station 1, laser distance sensor 2, sound and light alarm 3, speed bump 4, groove 5, support box 51, spring 6, pressure block 7, proximity switch 8, induction iron sheet 81, cover plate 9, slide rail 10, electric cylinder 11, connecting rod 12, one-way roller 13, rotating shaft 14, PLC controller 15 DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods:

[0018] like Figure 1 As shown, a limit alarm device for a raw coal unloading station includes a laser ranging sensor 2 installed above the unloading port of the raw coal unloading station 1 and an externally installed sound and light alarm 3. Two grooves 5 are provided at the front end of the unloading port of the raw coal unloading station 1. Wheel deceleration assemblies are installed in the grooves 5. Speed ​​reduction belts 4 are provided at the front end of the corresponding wheel deceleration assemblies. A press trigger assembly is provided in the speed reduction belt 4.

[0019] like Figure 3 , 4 As shown, the wheel reduction assembly includes a support box 51 in the mounting groove 5, a cover plate 9 that can slide on the slide rail 10 through an electric cylinder 11 is arranged on the upper part of the support box 51, and a plurality of one-way rollers 13 are supported inside the support box 51.

[0020] like Figure 3 , 4 As shown, the combined surface of the plurality of one-way rollers 13 is designed to be an arc surface, which can better fit with the surface of the wheel, thereby achieving the effect of wheel slippage.

[0021] like Figure 3 , 4As shown, the telescopic rod of the electric cylinder 11 is connected and fixed to the cover plate 9 through a connecting rod 12.

[0022] like Figure 2 As shown, the press trigger assembly includes a pressure block 7 which is arranged in the middle of the speed bump 4 and is movably connected. A spring 6 which is connected and fixed to the bottom surface of the speed bump 4 is arranged at the lower part of the pressure block 7. A proximity switch 8 is arranged on one side of the pressure block 7. An induction iron sheet 81 is arranged directly below the proximity switch 8.

[0023] like Figure 1 As shown, it also includes an automatic control system, which includes a laser distance sensor 2, an audible and visual alarm 3, a proximity switch 8 and an electric cylinder 11, which are electrically connected to the PLC controller 15 respectively.

[0024] The implementation principle of a limit alarm device for a raw coal unloading station in the embodiment of the present application is:

[0025] When the coal loading car unloads coal at the raw coal unloading station 1, the coal loading car needs to reverse and stop 0.1-0.2 meters in front of the speed bump 4, and the rear trough is directly opposite to the unloading pit, and at the same time, the distance set by the laser ranging sensor 2 (the distance is set according to the on-site situation, and its position is parallel to the rear trough of the car to contact the alarm);

[0026] When the safe distance is reached and the vehicle continues to reverse, it will be less than the distance set by the triggering laser range finder 2, and at the same time, a signal will be transmitted to the PLC controller 15, and the PLC controller 15 will send a signal to the sound and light alarm 3, and the sound and light alarm 3 will be started to warn, thereby playing a reminder role;

[0027] If the vehicle continues to move backward, the rear tire of the vehicle will roll over the speed bump 4. When rolling over the speed bump 4, the pressure reducing block 7 will press down to make the proximity switch 8 and the induction iron sheet 81 contact each other. After contact, the proximity switch 8 will be triggered to send a signal to the PLC controller 15. At the same time, the PLC controller 15 sends a signal to the electric cylinder 11 to extend the piston rod. When the piston rod is extended, it will drive the cover plate 9 to slide in the track to open the support box 51. At the same time, if the truck continues to reverse, the tire will sink into the curved surface formed by the one-way roller 13. When the tire continues to rotate, it will drive the one-way roller to rotate with it, so that the tire loses its grip. At the same time, the tire will slip, which will force the truck to stop and prevent it from falling into the unloading pit, thereby better protecting the life and property safety of the driver and passengers.

[0028] The cover plate 9 is usually in a closed state to prevent people from falling into the support box 51 and causing injuries.

[0029] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A limit alarm device for a raw coal unloading station, characterized in that: The invention comprises a laser distance measuring sensor (2) installed above the discharge port of a raw coal unloading station (1) and an externally installed sound and light alarm (3), wherein two grooves (5) are provided at the front end of the discharge port of the raw coal unloading station (1), a wheel deceleration assembly is installed in the grooves (5), a deceleration belt (4) is provided at the front end of the wheel deceleration assembly, and a press trigger assembly is provided in the deceleration belt (4).

2. A raw coal unloading station limit alarm device according to claim 1, characterized in that: The wheel deceleration assembly comprises a support box (51) in a mounting groove (5), a cover plate (9) which can slide on a slide rail (10) via an electric cylinder (11) is arranged on the upper part of the support box (51), and a plurality of one-way rollers (13) are supported inside the support box (51).

3. A raw coal unloading station limit alarm device according to claim 2, characterized in that: The combined surface of the plurality of one-way rollers (13) is designed to be an arc surface.

4. A raw coal unloading station limit alarm device according to claim 2, characterized in that: The telescopic rod of the electric cylinder (11) is connected and fixed to the cover plate (9) via a connecting rod (12).

5. The limit alarm device for a raw coal unloading station according to claim 1 is characterized in that: The press trigger assembly comprises a pressure block (7) arranged in the middle of the speed bump (4) and movably connected, a spring (6) connected and fixed to the bottom surface of the speed bump (4) is arranged at the lower part of the pressure block (7), a proximity switch (8) is arranged on one side of the pressure block (7), and an induction iron sheet (81) is arranged directly below the proximity switch (8).

6. The limit alarm device for a raw coal unloading station according to claim 1 is characterized in that: It also includes an automatic control system, which includes a laser distance measuring sensor (2), an audible and visual alarm (3), a proximity switch (8) and an electric cylinder (11) which are electrically connected to a PLC controller (15) respectively.

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