Anti-tearing and overlapping protection device for belt conveyor

Abstract

The utility model discloses a belt conveyor anti -tear overlapping protection device, it includes the suspension beam, sliding ring, first steel wire rope, second steel wire rope, telescopic device, the sliding ring is sleeved with the sliding ring of the outer wall sliding of suspension beam, and the bottom of sliding ring is fixed with first steel wire rope, and the bottom of first steel wire rope is fixed with fixed disc, the both ends of telescopic device are fixed with the support plate of vertical setting respectively, and the fixed connection of two support plates has the stretch spring, the bottom of support plate is fixed with the support, and the drum is rotatably connected with the support, and two drums are located respectively in the both sides of the belt of belt conveyor, and with the outside edge of belt movable contact, and the top of support plate is fixedly connected with fixed disc through second steel wire rope, and the inside of telescopic device is equipped with alarm trigger device. Advantage: under the action of suspension beam, sliding ring, first steel wire rope, when the belt deviation, can make telescopic device with belt left and right movement, can adjust according to deviation, realize automatic adaptation, reduce false alarm, solve the problem of false report.

Description

Technical Field

[0001] This utility model relates to the field of coal conveying technology, specifically to a protective device for preventing tearing and overlapping of belt conveyors. Background Technology

[0002] A coal mine belt conveyor is a device specifically designed for transporting materials such as coal in mining environments. This type of conveyor typically uses a belt as the transport medium, moving materials like coal from one location to another for efficient material transport. However, during material transport, the conveyor belt may tear due to factors such as excessive material weight, material properties, and ambient temperature, leading to wear and breakage. Longitudinal tearing is particularly common. Currently, most existing longitudinal tear protection systems rely on alarms triggered by falling material after a tear. However, due to the strong tension of the belt's counterweight, the tear may overlap at the point of breakage. Therefore, detecting overlap at the tear point is necessary for comprehensive identification of longitudinal tears.

[0003] Existing patent CN200820234085.X discloses an overlapping belt tear detection device, which includes at least one pair of detection switches. The detection switches are respectively located on the edges of the back side of a U-shaped belt via fixed brackets. When the belt tears at a certain position, both detection switches will simultaneously fail to detect the steel wires in the belt. At this time, the detection switches will send a signal to stop the belt from running.

[0004] The technical problem with this patent is that when there is overlap in the longitudinal tearing of the belt and the belt runs off to one side, there is still a situation where one detection switch can detect the steel wires in the belt, but the other detection switch cannot detect the steel wires in the belt. At this time, the detection switch cannot send a signal to stop the belt from running, and the longitudinal tearing of the belt cannot be detected in time. Utility Model Content

[0005] The purpose of this invention is to provide a protective device for belt conveyors to prevent tearing and overlapping.

[0006] This utility model is implemented by the following technical solution: a protective device for preventing tearing and overlapping of belt conveyors, which includes a suspension beam, a slip ring, a first steel wire rope, a second steel wire rope, and a telescopic device;

[0007] The outer wall of the suspension beam is slidably fitted with the slip ring, the bottom end of the slip ring is fixed with the first steel wire rope, and the bottom end of the first steel wire rope is fixed with a fixing disc.

[0008] The telescopic device has vertically arranged support plates fixed at both ends, and a tension spring is fixedly connected between the two support plates; a bracket is fixed at the bottom of the support plate, and a roller is rotatably connected to the bracket; the two rollers are located on both sides of the belt of the conveyor belt and are in movable contact with the outer edge of the belt; the top of the support plate is fixedly connected to the fixed plate through a second steel wire rope.

[0009] The telescopic device is equipped with an alarm triggering device inside.

[0010] Furthermore, the telescopic device is a telescopic rod, which includes a rod portion and a sleeve portion. The rod portion is slidably disposed inside the sleeve portion, and the end of the rod portion extends to the outside of the sleeve portion.

[0011] Furthermore, the alarm triggering device includes a proximity switch and a sensing element. The proximity switch is fixedly connected to the outer wall of the sleeve portion and is perpendicular to the sleeve portion. The trigger end of the proximity switch extends through the sleeve portion into the interior of the sleeve portion. The sensing element is fixedly connected to the end of a rod portion placed inside the sleeve portion and is in movable contact with the trigger end of the proximity switch.

[0012] Furthermore, it also includes a belt conveyor control circuit, which includes a belt conveyor running branch, an alarm sensing branch, an indicator branch, and a trigger branch.

[0013] Furthermore, a third steel wire rope is connected between the bottom end of the bracket and the frame of the belt conveyor.

[0014] Furthermore, the belt conveyor running branch includes a stop switch SB1, a start switch SB2, a normally closed contact of a second intermediate relay KA2, and a coil of a belt conveyor contactor KM, which are connected in series. The start switch SB2 is connected in parallel with a normally open contact of the belt conveyor contactor KM.

[0015] The alarm sensing branch of the belt conveyor includes a proximity switch SQ and the coil of the first intermediate relay KA1 connected in series, and the coil of the first intermediate relay KA1 is connected in parallel with the coil of the time relay KT.

[0016] The indicator branch includes a normally open contact of a first intermediate relay KA1 connected in series and an alarm light HL;

[0017] The triggering branch includes the energized delay closing contact of the time relay KT and the coil of the second intermediate relay KA2, which are connected in series.

[0018] Advantages of this utility model:

[0019] Under the action of the suspension beam, slip ring, and first wire rope, when the belt deviates, the telescopic device can move left and right with the belt. It can be adjusted according to the deviation, realize automatic adaptation, reduce false alarms, and solve the problem of false alarms.

[0020] The telescopic device is equipped with an alarm triggering device. When the belt tears during operation, the proximity switch is triggered in conjunction with the tension spring and the telescopic device. When the proximity switch is triggered, the belt conveyor stops for maintenance under the action of the belt conveyor control circuit. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a circuit diagram of the belt conveyor control circuit in this utility model;

[0024] In the diagram: 1. Suspension beam; 2. Slip ring; 3. First wire rope; 4. Fixed disc; 5. Telescopic device; 5.1. Telescopic rod; 5.1.1. Sleeve section; 5.1.2. Support plate; 6. Tension spring; 7. Bracket; 8. Roller; 9. Belt; 10. Second wire rope; 11. Alarm triggering device; 12. Proximity switch; 12.1. Induction plate; 12.2. Third wire rope; 13. Belt conveyor control circuit; 14. Belt conveyor running branch; 14.1. Alarm sensing branch; 14.2. Indicator branch; 14.3. Trigger branch; 14.4. Stop switch SB1; Start switch SB2; Second intermediate relay KA2; Belt conveyor contactor KM; Proximity switch SQ; First intermediate relay KA1; Time relay KT. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] like Figure 1-2 As shown, the anti-tear and anti-overlap protection device for the belt conveyor includes a suspension beam 1, a slip ring 2, a first wire rope 3, a second wire rope 11, and a telescopic device 5.

[0027] A sliding ring 2 is provided on the outer wall of the suspension beam 1. A first steel wire rope 3 is fixed to the bottom end of the sliding ring 2. A fixing plate 4 is fixed to the bottom end of the first steel wire rope 3.

[0028] Vertically arranged support plates 6 are fixed at both ends of the telescopic device 5, and a tension spring 7 is fixedly connected between the two support plates 6. A bracket 8 is fixed at the bottom of the support plate 6, and a roller 9 is rotatably connected to the bracket 8. The two rollers 9 are located on both sides of the belt 10 of the conveyor belt and are in movable contact with the outer edge of the belt 10. The top of the support plate 6 is fixedly connected to the fixed plate 4 through the second steel wire rope 11. Under the action of the second steel wire rope 11, an inverted Y-shaped connection structure is formed, which provides stability to the telescopic device 5.

[0029] Under the action of suspension beam 1, slip ring 2, and first wire rope 3, when belt 10 deviates, telescopic device 5 can move left and right with belt 10, reducing false alarms.

[0030] The telescopic device 5 is equipped with an alarm triggering device 12. When the belt 10 tears during operation, the alarm triggering device 12 will sound an alarm in cooperation with the tension spring 7 and the telescopic device 5.

[0031] The telescopic device 5 is a telescopic rod 5.1, which includes a rod part 5.1.1 and a sleeve part 5.1.2. The rod part 5.1.1 is slidably provided inside the sleeve part 5.1.2, and the end of the rod part 5.1.1 extends to the outside of the sleeve part 5.1.2.

[0032] The alarm triggering device 12 includes a proximity switch 12.1 and a sensing element 12.2. The proximity switch 12.1 is fixedly connected to the outer wall of the sleeve portion 5.1.2 and is perpendicular to the sleeve portion 5.1.2. The trigger end of the proximity switch 12.1 extends through the sleeve portion 5.1.2 and into the interior of the sleeve portion 5.1.2. The sensing element 12.2 is fixedly connected to the end of the rod portion 5.1.1 located inside the sleeve portion 5.1.2. The sensing element 12.2 is in movable contact with the trigger end of the proximity switch 12.1. When the belt 10 is torn, the rod portion 5.1.1 moves toward the sleeve portion 5.1.2, causing the sensing element 12.2 to contact the proximity switch 12.1 and triggering the proximity switch 12.1.

[0033] A third steel wire rope 13 is connected between the bottom end of the support 8 and the frame of the belt conveyor. The function of the third steel wire rope 13 is to limit the movement of the protective device and prevent it from moving forward with the belt 10.

[0034] It also includes a belt conveyor control circuit 14, which includes a belt conveyor running branch 14.1, an alarm sensing branch 14.2, an indicator branch 14.3, and a trigger branch 14.4. When the proximity switch 12.1 is triggered, the belt conveyor stops for maintenance under the action of the belt conveyor control circuit 14.

[0035] The belt conveyor running branch 14.1 includes a stop switch SB1, a start switch SB2, a normally closed contact of the second intermediate relay KA2, and a coil of the belt conveyor contactor KM, which are connected in series. The start switch SB2 is connected in parallel with a normally open contact of the belt conveyor contactor KM.

[0036] The alarm sensing branch 14.2 of the belt conveyor includes a proximity switch 12.1SQ and the coil of the first intermediate relay KA1 connected in series. The coil of the first intermediate relay KA1 is connected in parallel with the coil of the time relay KT.

[0037] The indicator branch 14.3 includes a normally open contact of the first intermediate relay KA1 connected in series and an alarm light HL; the trigger branch 14.4 includes a time delay closing contact of the time relay KT connected in series and a coil of the second intermediate relay KA2. The time relay KT can be set with an alarm time. After the proximity switch 12.1SQ is triggered, the power supply of the belt conveyor will be turned off only after the set time of the time relay KT, reducing the triggering of the proximity switch 12.1SQ caused by errors.

[0038] The specific operation process of this embodiment is as follows:

[0039] The suspension beam 1 is specifically a trestle support frame, which allows the telescopic device 5 to be in a flexible swinging state. The belt 10 and deviation will not affect the protection device. The function of setting rollers 9 on both sides of the belt 10 is to prevent the belt 10 from being damaged by friction.

[0040] The function of the third wire rope 13 is to limit the movement of the protection device. A proximity switch 12.1 is installed on the telescopic device 5. When the belt 10 is torn and overlaps, the belt 10 will become narrower. In this way, the protection device shortens the length of the telescopic device 5 by the tension of the tension spring 7. The rod part 5.1.1 of the telescopic device 5 moves towards the sleeve part 5.1.2, so that the sensing plate 12.2 touches the proximity switch 12.1. Under the action of the belt conveyor control circuit 14, the alarm light HL is used to sound an alarm. When the preset time of the time relay k is reached, the power supply of the belt conveyor is disconnected and the machine is stopped for maintenance.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A protective device for preventing tearing and overlapping of belt conveyors, characterized in that, It includes a suspension beam, slip rings, a first wire rope, a second wire rope, and a telescopic device; The outer wall of the suspension beam is slidably fitted with the slip ring, the bottom end of the slip ring is fixed with the first steel wire rope, and the bottom end of the first steel wire rope is fixed with a fixing disc. The telescopic device has vertically arranged support plates fixed at both ends, and a tension spring is fixedly connected between the two support plates; a bracket is fixed at the bottom of the support plate, and a roller is rotatably connected to the bracket; the two rollers are located on both sides of the belt of the conveyor belt and are in movable contact with the outer edge of the belt; the top of the support plate is fixedly connected to the fixed plate through a second steel wire rope. The telescopic device is equipped with an alarm triggering device inside.

2. The belt conveyor anti-tear and anti-overlap protection device according to claim 1, characterized in that, The telescopic device is a telescopic rod, which includes a rod portion and a sleeve portion. The rod portion is slidably disposed inside the sleeve portion, and the end of the rod portion extends to the outside of the sleeve portion.

3. The belt conveyor anti-tear and anti-overlap protection device according to claim 2, characterized in that, The alarm triggering device includes a proximity switch and a sensing element. The proximity switch is fixedly connected to the outer wall of the sleeve portion and is perpendicular to the sleeve portion. The trigger end of the proximity switch extends through the sleeve portion into the interior of the sleeve portion. The sensing element is fixedly connected to the end of a rod portion placed inside the sleeve portion and is in movable contact with the trigger end of the proximity switch.

4. The belt conveyor anti-tear overlap protection device according to claim 3, characterized in that, A third steel wire rope connects the bottom end of the support to the frame of the belt conveyor.

5. The belt conveyor anti-tear overlap protection device according to claim 4, characterized in that, It also includes a belt conveyor control circuit, which includes a belt conveyor running branch, an alarm sensing branch, an indicator branch, and a trigger branch.

6. The belt conveyor anti-tear overlap protection device according to claim 5, characterized in that, The belt conveyor running branch includes a stop switch SB1, a start switch SB2, a normally closed contact of a second intermediate relay KA2, and a coil of a belt conveyor contactor KM, which are connected in series. The start switch SB2 is connected in parallel with a normally open contact of the belt conveyor contactor KM. The alarm sensing branch of the belt conveyor includes a proximity switch SQ and the coil of the first intermediate relay KA1 connected in series, and the coil of the first intermediate relay KA1 is connected in parallel with the coil of the time relay KT. The indicator branch includes a normally open contact of a first intermediate relay KA1 connected in series and an alarm light HL; The triggering branch includes the energized delay closing contact of the time relay KT and the coil of the second intermediate relay KA2, which are connected in series.

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