Lifting alarm device

Abstract

The utility model discloses a lifting alarm device which comprises a lifting mechanism and a hydraulic system, the tail portion of the lifting mechanism is installed on a frame of a dumper in a rotating mode, a piston rod of the lifting mechanism is connected with a cargo compartment of the dumper in a rotating mode, one end of the cargo compartment is movably installed on the frame, and the other end of the cargo compartment is connected with the hydraulic system. The lifting mechanism is connected with the hydraulic system and controlled by the hydraulic system, a hydraulic pressure sensor is installed on a hydraulic pipeline of the hydraulic system and converts received pressure signals into electric signals, the electric signals are intrinsic safety signals, the intrinsic safety signals are input into the mining flameproof and intrinsic safety type control box, and the mining flameproof and intrinsic safety type control box is connected with the hydraulic system. And the mining explosion-proof and intrinsic safety type control box drives the encapsulated acousto-optic annunciator to give an alarm sound. By means of the mode, accurate and timely alarming is achieved when the dumper lifts a cargo compartment, and using is safer.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering vehicles, in particular to a lifting alarm device. Background Art

[0002] With the continuous development of the mining industry, the frequency of use of underground explosion-proof dump trucks has been increasing, and the safety of material loading and unloading has become an important concern of the industry. At present, when unloading underground explosion-proof dump trucks, the hydraulic lifting and lowering mechanism of the dump cargo box is mostly operated by the driver. Due to the small underground working environment and insufficient lighting, the goods loaded and unloaded by dump trucks are usually heavy objects such as sand, gravel, and cement. If no alarm is issued or the alarm is not timely during the unloading process, the driver and the people around him may relax their vigilance and fail to observe properly, causing the goods to hit and crush the staff; at the same time, if there is no accurate and timely alarm when the cargo box is lowered, it may also cause the cargo box to drive without being reset. When the dump truck is loaded with goods and encounters bad road conditions or climbing a slope, there is a safety hazard of vehicle rollover or backward rollover, which not only endangers the lives of the driver and surrounding staff, but also causes immeasurable losses to the goods.

[0003] Most of the existing dump truck lifting alarm devices are of the mechanical contact type. The mechanical switch has a small detection distance. When the detection components on the truck are deformed, the sound and light alarms may fail to serve as a warning, posing a safety hazard.

[0004] Based on the above defects and shortcomings, it is necessary to improve the existing technology and design a lifting alarm device to ensure accurate and timely alarm when the dump truck lifts the cargo box. Utility Model Content

[0005] The main technical problem solved by the utility model is to provide a lifting alarm device, which provides a safe and reliable alarm device when the dump truck lifts or lowers the lifting cylinder during unloading.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a lifting alarm device, which includes a lifting mechanism and a hydraulic system, the rear end of the lifting mechanism is rotatably installed on the frame of the dump truck, the piston rod of the lifting mechanism is rotatably connected to the cargo compartment of the dump truck, one end of the cargo compartment is movably installed on the frame, the lifting mechanism is connected to the hydraulic system and controlled by it, a hydraulic pressure sensor is installed on the hydraulic pipeline of the hydraulic system, the hydraulic pressure sensor converts the received pressure signal into an electrical signal, and this electrical signal is an intrinsically safe signal, which is input into a mine-use explosion-proof and intrinsically safe control box, and the mine-use explosion-proof and intrinsically safe control box drives the cast-in-place sound and light signal device to emit an alarm sound.

[0007] Preferably, the hydraulic system includes a hydraulic oil tank, a hydraulic pump, a lifting reversing valve, a hydraulic pressure sensor, a mine-use flameproof and intrinsically safe control box and a mine-use cast-in-place sound and light signal device. A hydraulic pump connected to the inside of the hydraulic oil tank is provided at the side end of the hydraulic oil tank. The hydraulic pump is connected to the lifting reversing valve through a hydraulic pipeline. The lifting reversing valve is connected to the lifting mechanism through a hydraulic pipeline. A hydraulic pressure sensor for measuring the hydraulic oil pressure is installed on the hydraulic pipeline between the lifting reversing valve and the lifting mechanism. The hydraulic pressure sensor is connected to the mine-use flameproof and intrinsically safe control box through an electrical signal. The mine-use flameproof and intrinsically safe control box controls the connection to the mine-use cast-in-place sound and light signal device.

[0008] Preferably, the lifting mechanism adopts an oil cylinder.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The alarm device is controlled by outputting an intrinsically safe signal through the hydraulic pressure sensor. Compared with mechanical switch control methods such as switches, this method does not rely on the position structure of the cargo box or cylinder, and avoids failure to alarm due to deformation of the frame or cargo box, or a small deviation to the left or right of the truck bed. This improves the accuracy of the lifting alarm and is safer and more reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is a structural schematic diagram of a lifting alarm device.

[0012] Among them, 1. Hydraulic oil tank, 2. Hydraulic pump, 3. Lifting reversing valve, 4. Hydraulic pressure sensor, 5. Lifting mechanism, 6. Mining explosion-proof and intrinsically safe control box, 7. Mining cast-in-place sound and light signal device. DETAILED DESCRIPTION

[0013] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0014] See also Figure 1 , the utility model embodiment includes:

[0015] A lifting alarm device comprises a hydraulic oil tank 1, a hydraulic pump 2, a lifting reversing valve 3, a hydraulic pressure sensor 4, a lifting mechanism 5, a mine-use flameproof and intrinsically safe control box 6 and a mine-use cast-in-place sound and light signal device 7.

[0016] A hydraulic pump 2 connected to the inside of the hydraulic oil tank 1 is arranged at the side end thereof, the hydraulic pump 2 is connected to the lifting reversing valve 3 through a hydraulic pipeline, the lifting reversing valve 3 is connected to the lifting mechanism 5 through a hydraulic pipeline, a hydraulic pressure sensor 4 for measuring the hydraulic oil pressure is installed on the hydraulic pipeline between the lifting reversing valve 3 and the lifting mechanism 5, the hydraulic pressure sensor 4 is connected to the mine flameproof and intrinsically safe control box 6 through an electrical signal, the mine flameproof and intrinsically safe control box 6 controls the connection of the mine cast-in-place sound and light signal device 7, the hydraulic oil tank 1, the hydraulic pump 2, the lifting reversing valve 3, the hydraulic pressure sensor 4, the mine flameproof and intrinsically safe control box 6 and the mine cast-in-place sound and light signal device 7 constitute a hydraulic system, the hydraulic pressure sensor 4 converts the received pressure signal into an electrical signal, the electrical signal is an intrinsically safe signal, the intrinsically safe signal is input into the mine flameproof and intrinsically safe control box 6, the mine flameproof and intrinsically safe control box 6 drives the cast-in-place sound and light signal device 7 to emit an alarm sound.

[0017] The rear end of the lifting mechanism 5 is rotatably mounted on the frame of the dump truck, the piston rod of the lifting mechanism 5 is rotatably connected to the cargo compartment of the dump truck, one end of the cargo compartment is movably mounted on the frame, and the lifting mechanism 5 is connected to and controlled by the hydraulic system.

[0018] The lifting mechanism 5 adopts an oil cylinder.

[0019] When the utility model is a lifting alarm device, the hydraulic pump 2 pumps the oil in the hydraulic oil tank 1 into the hydraulic pipeline, and controls the action of the lifting mechanism 5 by controlling the lifting reversing valve 3. When the lifting mechanism 5 is lifted or lowered, hydraulic oil pressure will be generated in the hydraulic pipeline, and the hydraulic pressure sensor 4 will convert the received pressure signal into an electrical signal, which is an intrinsically safe signal. The intrinsically safe signal is input to the mine flameproof and intrinsically safe control box 6, and the mine flameproof and intrinsically safe control box 6 drives the mine cast-in-place sound and light signal device 7 to emit an alarm sound until the lifting mechanism 5 completes the action, no longer generates a pressure signal, and stops the alarm.

[0020] The utility model discloses a lifting alarm device, which ensures accurate and timely alarm when a dump truck lifts a cargo compartment, and is safer and more reliable to use.

[0021] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A lifting alarm device, characterized in that: It includes a lifting mechanism and a hydraulic system. The rear end of the lifting mechanism is rotatably installed on the frame of the dump truck. The piston rod of the lifting mechanism is rotatably connected to the cargo box of the dump truck. One end of the cargo box is movably installed on the frame. The lifting mechanism is connected to the hydraulic system and controlled by it. A hydraulic pressure sensor is installed on the hydraulic pipeline of the hydraulic system. The hydraulic pressure sensor converts the received pressure signal into an electrical signal, which is an intrinsically safe signal. The intrinsically safe signal is input into a mine-use flameproof and intrinsically safe control box, which drives the cast-in-place sound and light signal device to emit an alarm sound.

2. A lifting alarm device according to claim 1, characterized in that: The hydraulic system includes a hydraulic oil tank, a hydraulic pump, a lifting reversing valve, a hydraulic pressure sensor, a mine-use flameproof and intrinsically safe control box and a mine-use cast-in-place sound and light signal device. A hydraulic pump connected to the inside of the hydraulic oil tank is arranged at the side end of the hydraulic oil tank. The hydraulic pump is connected to the lifting reversing valve through a hydraulic pipeline. The lifting reversing valve is connected to the lifting mechanism through a hydraulic pipeline. A hydraulic pressure sensor for measuring the hydraulic oil pressure is installed on the hydraulic pipeline between the lifting reversing valve and the lifting mechanism. The hydraulic pressure sensor is connected to the mine-use flameproof and intrinsically safe control box through an electrical signal. The mine-use flameproof and intrinsically safe control box controls the connection of the mine-use cast-in-place sound and light signal device.

3. A lifting alarm device according to claim 1, characterized in that: The lifting mechanism adopts an oil cylinder.

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