Anti-tearing protection device for belt conveyor and belt conveyor

Abstract

The present invention discloses a belt conveyor tear-proof protection device, comprising a control system, a supporting beam and a connecting rod horizontally arranged above the return belt of the belt conveyor, the middle part of the connecting rod is hinged with the supporting beam, a magnet is arranged at the upper end of the connecting rod, a coal blocking plate is connected to the lower end, a magnetic sensor is arranged at a position corresponding to the magnet on the supporting beam, and the magnetic sensor is electrically connected to the control system. The belt conveyor tear-proof protection device can identify the coal condition on the return belt of the belt conveyor, and when a large amount of coal falls on the return belt, the belt conveyor can be stopped in time and an alarm is issued.

Description

Technical Field

[0001] The invention relates to the technical field of conveyor protection devices, and in particular to an anti-tearing protection device for a belt conveyor and a belt conveyor. Background Art

[0002] Belt conveyors are widely used in coal, metallurgy, power generation, medicine, food and other industries. Belt conveyors have strong continuous transportation capacity, high operating efficiency and are easy to realize automatic control. However, in the coal flow transportation system of coal mines, due to its complex operating environment, most of them are transported in inclined lanes. During the transportation of coal, coal is easy to fall onto the return belt. Since there is no post at the tail of the belt conveyor, timely and effective measures cannot be taken for abnormal conditions at the tail, which can easily cause damage to the belt. The current treatment method is to install a sweeper on the return belt to clean up the coal or foreign matter on the return belt, but this method is only effective when there is a small amount of coal or individual foreign matter on the return belt. When there are abnormal conditions such as large water coal, belt deviation or large pieces of coal gangue stuck, the return belt will drop a large amount of coal, which exceeds the capacity of the sweeper. At the least, a large amount of return coal will accumulate on the tail drum, and the belt conveyor will stop under heavy load. At the worst, the belt will be damaged or even torn, which will bring great economic losses and safety hazards. In view of the above problems, it is urgent to develop an anti-tear protection device for belt conveyor, which can issue a warning and stop the belt conveyor in time when there is a large amount of coal or foreign matter on the non-working surface of the belt to prevent damage to the belt. Summary of the invention

[0003] The purpose of the present invention is to provide a belt conveyor anti-tear protection device and a belt conveyor. The belt conveyor anti-tear protection device can identify the coal situation on the return belt of the belt conveyor. When a large amount of coal falls on the return belt, the belt conveyor can be stopped in time and an alarm can be issued.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A belt conveyor tear protection device comprises a control system, a supporting beam and a connecting rod horizontally arranged above the return belt of the belt conveyor, the middle part of the connecting rod is hinged to the supporting beam, the upper end of the connecting rod is provided with a magnet, and the lower end is connected to a coal blocking plate, a magnetic sensor is provided at a position corresponding to the magnet on the supporting beam, and the magnetic sensor is electrically connected to the control system.

[0006] Preferably, the middle portion of the connecting rod is hinged to the lower end of the middle portion of the supporting beam, and the lower end of the connecting rod is connected to the middle portion of the coal blocking plate.

[0007] Preferably, the coal blocking plate is provided with a buffer rubber layer for buffering the impact of coal falling from the return belt on the coal blocking plate.

[0008] Preferably, it also includes two T-shaped support seats, the support seats include a horizontal plate and a vertical plate, the support beam is fixedly connected between the vertical plates of the two support seats, and the horizontal plate of the support seat is fixedly connected to the frame of the belt conveyor.

[0009] Preferably, the supporting crossbeam is configured as a channel steel, the middle portion of the connecting rod is hinged to the lower end of the middle portion of one side of the groove of the supporting crossbeam, and the magnetic sensor is disposed in the groove of the supporting crossbeam.

[0010] Preferably, the magnet is a strong magnet, and the magnetic sensor is an explosion-proof magnetic sensor.

[0011] A belt conveyor comprises two belt conveyor anti-tear protection devices as described above, wherein two magnetic sensor output points in the two belt conveyor anti-tear protection devices are connected in series.

[0012] Preferably, the distance between the two belt conveyor anti-tear protection devices is set to the self-reset time of the belt conveyor anti-tear protection device multiplied by the belt speed of the belt conveyor.

[0013] Preferably, the two belt conveyor anti-tear protection devices are separated by a distance of 5 belt conveyor frames.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention provides an anti-tear protection device for a belt conveyor. The anti-tear protection device for a belt conveyor can identify the condition of coal on the return belt of the belt conveyor. When a large amount of coal falls on the return belt, the belt conveyor can be stopped in time and an alarm can be issued to prevent damage to the belt, thereby avoiding economic losses and improving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic structural diagram of the anti-tear protection device for a belt conveyor of the present invention.

[0018] Figure 2 It is a structural schematic diagram of the belt conveyor anti-tear protection device in the operating state of the present invention.

[0019] Figure 3This is a schematic diagram of the installation structure of the anti-tear protection device for a belt conveyor of the present invention.

[0020] In the figure: 11 - horizontal plate, 12 - vertical plate, 2 - supporting beam, 3 - connecting plate, 4 - coal retaining plate, 5 - strong magnet, 6 - magnetic sensor, 7 - frame. DETAILED DESCRIPTION

[0021] The core of the present invention is to provide a belt conveyor anti-tear protection device and a belt conveyor. The belt conveyor anti-tear protection device can identify the coal situation on the return belt of the belt conveyor. When a large amount of coal falls on the return belt, the belt conveyor can be stopped in time and an alarm can be issued.

[0022] In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application.

[0023] like Figure 1 , 2 As shown in and 3, the belt conveyor anti-tear protection device provided in this specific embodiment includes a control system, two T-shaped support seats, a support beam 2 and a connecting rod 3 horizontally arranged above the return belt of the belt conveyor, the support seat includes a horizontal plate 11 and a vertical plate 12, the support beam 2 is fixedly connected between the vertical plates 12 of the two support seats, the horizontal plate 11 of the support seat is fixedly connected to the frame 7 of the belt conveyor, the T-shaped support seat supports the support beam 2 above the return belt of the belt conveyor, the length of the support beam 2 can be adjusted according to different types of belt conveyors, so that the belt conveyor anti-tear protection device has a wide range of applications, and the support beam 2 is set to channel steel, the material is common, and it is easy to purchase.

[0024] The middle part of the connecting rod 3 is hinged to the lower end of the middle part of one side of the groove of the supporting beam 2. The supporting beam 2 limits the connecting rod 3. A strong magnet 5 is provided at the upper end of the connecting rod 3, and a coal blocking plate 4 is connected to the lower end. The coal blocking plate 4 is set to a rectangular structure. The lower end of the connecting rod 3 is connected to the middle part of the coal blocking plate 4. A buffer rubber layer is provided on the coal blocking plate 4 to buffer the impact of falling coal, foreign objects, etc. on the return belt on the coal blocking plate 4.

[0025] An explosion-proof magnetic sensor 6 is provided at a position on the supporting beam 2 corresponding to the strong magnet 5. The explosion-proof magnetic sensor 6 is provided in a groove of the supporting beam 2. The explosion-proof magnetic sensor 6 is electrically connected to the control system, and the explosion-proof magnetic sensor 6 transmits information to the control system.

[0026] When a small amount of coal or other foreign matter falls onto the return belt of the belt conveyor, a small amount of coal can pass through the coal blocking plate 4, and the coal blocking plate 4 drives the connecting rod 3 and the strong magnet 5 at the upper end of the connecting rod 3 to rotate around the hinge point between the connecting rod 3 and the supporting beam 2. At this time, the output point of the explosion-proof magnetic sensor 6 is closed. When a small amount of coal or other foreign matter passes through, the coal blocking plate 4 and the connecting rod 3 can quickly reset and self-lock by relying on the gravity of the coal blocking plate 4 and the strong magnet 5, and the output point of the explosion-proof magnetic sensor 6 is disconnected. Under this condition, the belt conveyor operates normally, and a small amount of coal or other foreign matter on the return belt of the belt conveyor can be cleaned by the sweeper provided on the belt conveyor; when a large amount of coal or other foreign matter falls on the return belt of the belt conveyor, a large amount of coal or other foreign matter prevents the coal blocking plate 4 and the connecting rod 3 from resetting.

[0027] The present invention also provides a belt conveyor, comprising two belt conveyor anti-tear protection devices as described in the embodiment, the two belt conveyor anti-tear protection devices are separated by a distance of 5 belt conveyor frames 7, the distance between the two belt conveyor anti-tear protection devices is calculated based on the self-reset time of the belt conveyor anti-tear protection device (multiple tests show that the average time is 2.83 seconds and the value is 3 seconds) × the belt speed of the belt conveyor, the installation interval distance is calculated, the normally closed point of the explosion-proof magnetic sensor 6 is used, the output point of the explosion-proof magnetic sensor 6 is disconnected in the normal position, the output points of the two explosion-proof magnetic sensors 6 in the two belt conveyor anti-tear protection devices are connected in series, when a small amount of foreign matter such as coal touches the first belt conveyor anti-tear protection device, the output point of the first explosion-proof magnetic sensor 6 is closed, when a small amount of foreign matter such as coal touches the second belt conveyor anti-tear protection device, the output point of the second explosion-proof magnetic sensor 6 is closed, because the first belt conveyor anti-tear protection device has been reset under the action of its own gravity and strong magnetism, it will not trigger a stop signal, and the belt conveyor operates normally. Only when there is a large amount of continuous coal on the return belt, the output points of the two explosion-proof magnetic sensors 6 are closed at the same time, triggering the stop signal, and the belt conveyor will stop running and issue an alarm.

[0028] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A belt conveyor, characterized in that: It comprises a belt conveyor tear-proof protection device, which comprises a control system, a supporting beam and a connecting rod horizontally arranged above the return belt of the belt conveyor, wherein the middle part of the connecting rod is hinged to the supporting beam, a magnet is arranged at the upper end of the connecting rod, and a coal blocking plate is connected to the lower end, a magnetic sensor is arranged at a position corresponding to the magnet on the supporting beam, and the magnetic sensor is electrically connected to the control system; A small amount of coal on the return belt of the belt conveyor is cleaned by a cleaner provided on the belt conveyor; when a large amount of coal falls on the return belt of the belt conveyor, the large amount of coal prevents the coal baffle plate and the connecting rod from being reset; There are two anti-tear protection devices for the belt conveyor. The two magnetic sensor output points in the two anti-tear protection devices for the belt conveyors are connected in series. When a small amount of coal touches the first anti-tear protection device for the belt conveyor, the output point of the first explosion-proof magnetic sensor is closed. When a small amount of coal touches the second anti-tear protection device for the belt conveyor, the output point of the second explosion-proof magnetic sensor is closed. Since the anti-tear protection device for the first belt conveyor has been reset under the action of its own gravity and strong magnetism, it will not trigger a stop signal and the belt conveyor will operate normally. The distance between the two belt conveyor tearing protection devices is set to the self-reset time of the belt conveyor tearing protection device multiplied by the belt speed of the belt conveyor; The middle part of the connecting rod is hinged to the lower end of the middle part of the supporting beam, and the lower end of the connecting rod is connected to the middle part of the coal blocking plate.

2. The belt conveyor according to claim 1, characterized in that: The coal blocking plate is provided with a buffer rubber layer for preventing the coal blocking plate from being impacted by falling coal.

3. The belt conveyor according to claim 1, characterized in that: It also includes two T-shaped support seats, which include a horizontal plate and a vertical plate. The support beam is fixedly connected between the vertical plates of the two support seats, and the horizontal plate of the support seat is fixedly connected to the frame of the belt conveyor.

4. The belt conveyor according to claim 1, characterized in that: The supporting crossbeam is configured as a channel steel, the middle portion of the connecting rod is hinged to the lower end of the middle portion of one side of the groove of the supporting crossbeam, and the magnetic sensor is disposed in the groove of the supporting crossbeam.

5. The belt conveyor according to claim 1, characterized in that: The magnet is a strong magnet, and the magnetic sensor is an explosion-proof magnetic sensor.

6. The belt conveyor according to claim 1, characterized in that: The two belt conveyor tear guards are spaced apart by a distance of 5 belt conveyor frames.

Images