Anti-out-of-control device for large-gradient downhill pulling rubber belt conveyor

Abstract

The anti-out-of-control device comprises a damping bed body, a control system and a telescopic oil cylinder, the damping bed body comprises a conical groove body connected through a damping plate, a supporting support is fixed to the bottom end of the conical groove body, the two sides of the supporting support are connected with the driving end of the telescopic oil cylinder respectively, and the driving end of the telescopic oil cylinder is connected with the control system. The two telescopic oil cylinders are fixed to a claw frame of the belt conveyor, and the damping bed body is located below a top belt. The control system comprises speed sensors, a relay and a PLC processor, the PLC processor is connected with the speed sensors and the relay, the speed sensors are arranged at the machine head and the machine tail of the belt conveyor, and the relay is connected with an electromagnetic pilot valve set of the telescopic oil cylinder and controls the telescopic oil cylinder to ascend and descend. A plurality of damping bed bodies are arranged on a downhill belt of the belt conveyor at intervals and stretch out and draw back along with lifting of the lifting oil cylinder. Loss of the belt is reduced, friction force of the belt is sharply increased, and the downhill speed of the belt of the belt conveyor is controlled.

Description

Technical Field

[0001] The utility model relates to the field of steep downhill pulling belt conveyors, in particular to an anti-runaway device for steep downhill pulling belt conveyors. Background Art

[0002] The underground geological environment of coal mines is complex, and the transportation tunnels are thousands of meters long. The average slope of some coal mines is more than ten degrees, and the maximum slope is 25 degrees. When the amount of coal increases during transportation, the belt will go down and the belt speed will increase, causing accidents such as coal piling up on the belt head, burying the head, and burning the inverter. The existing way to prevent the belt speed from getting out of control is to increase the roller bracket, increase the belt friction, and increase the belt support force at the slope change point, which can slow down the belt running speed, but the roller bracket has been rubbing against the belt, which reduces the life of the belt and roller. Utility Model Content

[0003] In order to fundamentally solve the problem in the prior art that the belt speed is out of control due to the increase in coal volume on a belt conveyor going downhill at a steep slope, the utility model proposes an anti-loss-of-control device for a belt conveyor going downhill at a steep slope.

[0004] The technical solution of the utility model is achieved in this way:

[0005] An anti-runaway device for a belt conveyor used for downhill transportation on a large slope, comprising: a damping bed, a control system and a telescopic oil cylinder, wherein the damping bed comprises a conical trough connected by a damping plate, a support bracket is fixed at the bottom end of the conical trough, and the two sides of the support bracket are respectively connected to the driving end of the telescopic oil cylinder, the two telescopic oil cylinders are fixed on the horn of the belt conveyor, and the damping bed is located below the top belt;

[0006] The control system includes a speed sensor and a PLC processor. The PLC processor is connected to the speed sensor. The speed sensor is arranged at the head and tail of the belt conveyor. The PLC processor is connected to the electromagnetic pilot valve group of the telescopic cylinder through a relay to control the lifting of the telescopic cylinder.

[0007] The downhill belt of the belt conveyor is provided with a plurality of damping beds at intervals, which are extended and retracted along with the lifting and lowering of the lifting cylinder.

[0008] Preferably, it also includes a warning light and an audible and visual alarm, which are installed outside the head operating chamber of the belt conveyor and are respectively connected to the PLC processor.

[0009] Preferably, it also includes a camera and a display screen, the camera is installed at the downhill belt of the belt conveyor, and the display screen is located in the head operating chamber of the belt conveyor.

[0010] Preferably, the PLC processor is connected to the frequency converter, working surface support light and alarm of the scraper conveyor.

[0011] The beneficial effects of the utility model are as follows: the anti-runaway device for the belt conveyor used for downhill transportation of a large slope, when the belt speed is monitored to exceed the expected speed, the control system is used to control the telescopic oil cylinder to raise the damping bed body at the downhill belt as a whole to hold up the top belt, sharply increase the friction of the top belt, and quickly reduce the speed of the belt. When the belt speed is monitored to be less than the expected speed, the control system is used to control the telescopic oil cylinder to lower the damping bed body at the downhill belt as a whole to separate from the top belt, and the belt conveyor operates normally, fundamentally controlling the speed of the belt conveyor. In addition, the friction with the top belt is increased only when the speed is reduced, reducing the friction loss to the top belt and extending the belt life of the belt conveyor. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a schematic diagram of the use of the anti-runaway device for pulling a belt conveyor down a steep slope according to the utility model;

[0014] Figure 2 It is a schematic diagram of the use of the damping bed and telescopic cylinder of the utility model on a belt conveyor;

[0015] Figure 3 for Figure 2 The structural schematic diagram of the damping bed and the telescopic cylinder is shown;

[0016] Figure 4 It is a structural schematic diagram of the control system of the utility model.

[0017] In the figure:

[0018] 1. Damping bed; 2. Telescopic cylinder; 3. Control system; 4. Belt conveyor; 5. Warning light; 6. Sound and light alarm; 7. Camera; 8. Speed ​​sensor; 11. Damping plate; 12. Conical trough; 13. Support bracket. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example: Figures 1 to 3 The anti-runaway device for the belt conveyor for downhill transportation with a large slope shown in the figure comprises: a damping bed 1, a telescopic oil cylinder 2 and a control system 3. The damping bed 1 comprises a conical trough 12 connected by a damping plate 11. The bottom end of the conical trough 12 is fixed with a support bracket 13. The two sides of the support bracket 13 are respectively connected to the driving ends of the telescopic oil cylinder 2. The two telescopic oil cylinders 2 are fixed on the horn of the belt conveyor 4. The damping bed 1 is located below the top belt. There are several damping beds 1 at intervals at the downhill belt of the belt conveyor 4, which are telescopic with the lifting and lowering of the lifting oil cylinder 2. A warning light 5 and an audible and visual alarm 6 connected to the control system are installed outside the head operation chamber of the belt conveyor 4. The head operation chamber of the belt conveyor is also provided with a display screen, which is connected to a camera 7 installed at the downhill belt of the belt conveyor. Speed ​​sensors 8 are provided at the head and tail of the belt conveyor.

[0021] like Figure 4 As shown, the control system includes a speed sensor and a PLC processor. The PLC processor is connected to the speed sensor. The PLC processor is connected to the electromagnetic pilot valve group of the telescopic cylinder through a relay to control the lifting of the telescopic cylinder. The PLC processor is connected to the warning light, the sound and light alarm, the frequency converter of the scraper conveyor, the working surface bracket light, and the alarm at the working surface.

[0022] When the control system is applied, when the speed sensor detects that the speed of the belt conveyor is greater than or equal to 2.3m / s, the warning light will light up, the sound and light alarm will give a voice prompt to prevent people from approaching, and the PLC processor will control the telescopic cylinder to rise, the damping bed will rise, and the top belt of the belt conveyor will be lifted, greatly increasing the friction of the top belt and reducing the running speed of the belt conveyor. At the same time, the PLC processor controls the inverter frequency of the scraper conveyor to drop from 50Hz to 38Hz, and the working face support light will flash every 8s and keep for 3 minutes, giving a voice warning to remind the coal mining machine staff of the working face to intervene in the coal supply of the working face, and the downhill belt is going down, so the coal mining machine will be slowed down. When the speed sensor detects that the speed of the belt conveyor is less than 2.3m / s, the PLC processor controls the telescopic cylinder to drop, the damping bed will reset, the alarm and warning will stop, the inverter frequency of the scraper conveyor will be restored, and the speed of the coal mining machine will be restored.

[0023] The display screen on the belt conveyor monitors the running status of the downhill belt and the expansion and contraction status of the damping bed in real time. There is no need to arrange special staff for monitoring, which not only improves the accuracy of monitoring but also avoids accidental injuries to staff. The control system controls the inverter of the scraper conveyor and prompts the personnel of the fully mechanized working face, matching the coal delivery volume of the belt conveyor from the source of coal supply. The scraper conveyor and the fully mechanized working face cooperate with the belt conveyor at the same time, which not only matches the overall coal volume connection and maintains the consistency of the overall transportation, but also increases the safety of the staff's workplace. When the belt is under the string, the staff is reminded to stay away and pay attention to safety, reducing the accident rate underground.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-runaway device for a belt conveyor used for downhill transportation on a steep slope, characterized in that: include: A damping bed, a control system and a telescopic oil cylinder. The damping bed includes a conical trough connected by a damping plate. A support bracket is fixed at the bottom end of the conical trough. Both sides of the support bracket are respectively connected to the driving ends of the telescopic oil cylinder. The two telescopic oil cylinders are fixed on the horn of the belt conveyor. The damping bed is located below the top belt. The control system includes a speed sensor and a PLC processor. The PLC processor is connected to the speed sensor. The speed sensor is arranged at the head and tail of the belt conveyor. The PLC processor is connected to the electromagnetic pilot valve group of the telescopic cylinder through a relay to control the lifting of the telescopic cylinder. The downhill belt of the belt conveyor is provided with a plurality of damping beds at intervals, which are extended and retracted along with the lifting and lowering of the lifting cylinder.

2. The anti-runaway device for a belt conveyor used for downhill transportation on a large slope according to claim 1 is characterized in that: It also includes a warning light and an audible and visual alarm, which are installed outside the head operating chamber of the belt conveyor and are respectively connected to the PLC processor.

3. The anti-runaway device for a belt conveyor used for downhill transportation on a large slope according to claim 1 is characterized in that: It also includes a camera and a display screen. The camera is installed at the downhill belt of the belt conveyor, and the display screen is located in the head operating chamber of the belt conveyor.

4. The anti-runaway device for a belt conveyor used for downhill transportation on a steep slope according to claim 1 is characterized in that: The PLC processor is connected to the frequency converter, working surface support light and alarm of the scraper conveyor.

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