Anti-tearing detection device for belt coal dropping pipe

Abstract

The utility model relates to an anti-tear detection device for a belt coal drop pipe, which comprises a box body, the box body is arranged on the side edge of a second upper coal drop pipe towards the coal drop transportation direction and used for accommodating and supporting the whole anti-tear detection device, the box body is communicated with the second upper coal drop pipe at the joint, and the box body is not provided with a bottom surface towards the belt direction. The box body is provided with three side walls in the vertical direction; the monitoring baffle is provided with two ends, the upper end of the monitoring baffle is rotatably installed on the side wall in the opposite direction of the box body, and the lower end of the monitoring baffle can freely rotate along with the upper end; and the limit switch is connected with the monitoring baffle plate. According to the anti-tearing detection device disclosed by the utility model, when a rod-shaped object including ironware and branches falls down from the coal falling opening of the belt, the rod-shaped object is clamped between the belt and the monitoring baffle plate, so that the monitoring baffle plate rotates under thrust, and the limiting switch is triggered, and further, foreign matters are monitored in an early stage, and the situation that the foreign matters jam and tear the belt for a long time is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of belt conveyors in thermal power plants, and particularly relates to a tear prevention detection device for a belt coal dropping pipe. Background Technique

[0002] Due to the advantages of large conveying capacity, simple structure, high efficiency, low cost, etc., belt conveyors are commonly used in thermal power plants to transport coal yard fuel to the furnace for combustion. Since foreign objects are carried in the pulverized coal, the conveying belt will be scratched, and over time, the belt will be torn. Once the belt tearing situation worsens and the maintenance personnel fail to detect it in time, the entire belt will be damaged, causing huge economic losses to the power plant.

[0003] At present, the belt tearing protection device of the belt conveyor mainly monitors the belt tearing state by installing a laser scanner, a longitudinal mechanical pull rope, an infrared camera, etc. under the upper belt. However, they can only make a judgment on the premise that the belt has been torn, and cannot predict the belt tearing, so as to fundamentally avoid the occurrence of belt tearing. After analyzing the operating conditions of the coal conveying belt and the occurrence of belt tearing, it is found that the vast majority of belt tearing is caused by the jamming of rod-shaped objects such as ironware and branches at the feeding port, and the long-term friction and scratching with the coal conveying belt result in belt tearing. Most tearing switches can only act after the conveyor belt is torn through, making the protective effect of the tearing switch very limited. The reliability and stability of many products are relatively poor, and many users simply give up installing tearing switches and rely on indirect means such as strengthening inspections and minimizing large debris in the material to reduce the possibility of tearing.

[0004] Therefore, it is urgent to develop a detection device that can timely detect whether there is a tearing hidden danger in the belt coal dropping pipe to prevent the belt coal dropping pipe from tearing. Summary of the Invention

[0005] The technical problem to be solved by the utility model is that the existing belt detection technology can only make a judgment on the premise that the belt has been torn, and cannot predict the belt tearing, so as to fundamentally avoid the occurrence of belt tearing.

[0006] To solve the above technical problems, the present utility model provides an anti-tearing detection device for a belt coal dropping pipe. The belt coal dropping pipe includes a first upper coal dropping pipe and a second upper coal dropping pipe which are arranged above the belt and from top to bottom. The belt for receiving and transporting the falling coal is horizontally arranged transversely. The anti-tearing detection device is arranged on the side of the second upper coal dropping pipe facing the direction in which the falling coal is transported. The anti-tearing detection device includes: a box body, which is arranged on the side of the second upper coal dropping pipe facing the direction in which the falling coal is transported, used to accommodate and support the entire anti-tearing detection device. The connection between the box body and the second upper coal dropping pipe is communicated. The box body has no bottom surface facing the belt direction and has three side walls in the vertical direction; a monitoring baffle, which has two ends. The upper end of the monitoring baffle is rotatably installed on the side walls in opposite directions of the box body, and the lower end can freely rotate with the upper end; a limit switch, which is installed and connected to the monitoring baffle. Among them, when a rod-shaped object including ironware and branches falls from the belt coal dropping port, the rod-shaped object is stuck between the belt and the monitoring baffle, causing the monitoring baffle to rotate under the thrust, thereby triggering the limit switch, and further realizing early monitoring of foreign objects and avoiding the belt from being torn due to long-term jamming of foreign objects.

[0007] According to an embodiment of the present utility model, the anti-tearing detection device for a belt coal dropping pipe may further include: a baffle crank arm, which has two ends. One end is fixedly connected to the upper end of the monitoring baffle, and the other end contacts the limit switch. When the monitoring baffle rotates, the baffle crank arm follows the monitoring baffle to rotate, and the other end of the baffle crank arm touches the limit switch.

[0008] According to an embodiment of the present utility model, the anti-tearing detection device for a belt coal dropping pipe may further include: a rotating shaft, and the monitoring baffle is connected in the box body through the rotating shaft. One end of the baffle crank arm is fixedly connected to the rotating shaft.

[0009] According to an embodiment of the present utility model, the anti-tearing detection device for a belt coal dropping pipe may further include: a maintenance manhole door, which is opened on the side wall of the box body for maintenance personnel to enter the box body for maintenance.

[0010] According to an embodiment of the present utility model, the rotating shaft may be arranged on the maintenance manhole door and the opposite side wall.

[0011] According to an embodiment of the present utility model, the anti-tearing detection device for a belt coal dropping pipe may further include: a control unit, which is used to detect whether the limit switch is touched and send out information that the limit switch is touched.

[0012] According to an embodiment of the present utility model, the anti-tearing detection device for a belt coal dropping pipe may further include: an alarm device, which is used to receive the information that the limit switch is touched sent by the control unit and send out an alarm signal.

[0013] According to an embodiment of the present utility model, the alarm signal may include: sound prompt or flashing light prompt.

[0014] According to an embodiment of the present utility model, the box body may be cuboid-shaped.

[0015] According to an embodiment of the present utility model, the monitoring baffle may be rectangular.

[0016] Compared with the prior art, the technical solution provided by the embodiment of the present utility model can at least achieve the following beneficial effects:

[0017] The anti-tearing monitoring device for the belt coal dropping pipe of the present utility model can detect the signal at the initial stage of foreign object jamming by setting a detection baffle and a limit switch at the hopper opening at the tail of the conveyor belt, so as to realize pre-judgment. Compared with the traditional belt tearing protection device, this device can give an early warning when a foreign object jams and rubs between the coal dropping pipe and the belt, so as to realize pre-judgment and prevent the occurrence of belt tearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present utility model and do not limit the present utility model.

[0019] Figure 1 is an exploded view of the anti-tearing detection device for the belt coal dropping pipe according to an embodiment of the present utility model;

[0020] Figure 2 is a schematic diagram of the anti-tearing detection device for the belt coal dropping pipe according to an embodiment of the present utility model;

[0021] Figure 3 is Figure 2 a partial enlarged view of;

[0022] Figure 4 is a schematic diagram of the back of the anti-tearing detection device for the belt coal dropping pipe according to an embodiment of the present utility model;

[0023] Figure 5 is Figure 4 a partial enlarged view of;

[0024] Figure 6 is a schematic diagram when a rod-shaped object falls into the belt coal dropping pipe;

[0025] Figure 7 is a schematic diagram when the anti-tearing detection device for the belt coal dropping pipe according to an embodiment of the present utility model detects a rod-shaped object. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0027] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings as understood by those of ordinary skill in the art to which the present utility model pertains. The "first", "second" and similar terms used in the description and claims of the patent application of the present utility model do not denote any order, quantity or importance, but are only used to distinguish different components. Similarly, the terms such as "a" or "one" do not denote a quantity limitation, but mean that there is at least one.

[0028] Figure 1 is an exploded view showing a tear prevention detection device for a belt coal dropping pipe according to an embodiment of the present utility model; Figure 2 is a schematic view showing a tear prevention detection device for a belt coal dropping pipe according to an embodiment of the present utility model; Figure 3 is Figure 2 a partial enlarged view of; Figure 4 is a schematic view showing the back of a tear prevention detection device for a belt coal dropping pipe according to an embodiment of the present utility model; Figure 5 is Figure 4 a partial enlarged view of.

[0029] The belt coal dropping pipe includes a first upper coal dropping pipe 1 and a second upper coal dropping pipe 2 which are arranged above the belt and from top to bottom. The belt for receiving and transporting the falling coal is horizontally arranged transversely. The tear prevention detection device is arranged on the side of the second upper coal dropping pipe 2 facing the direction in which the falling coal is transported.

[0030] As Figures 1 to 5 shown, the tear prevention detection device for the belt coal dropping pipe includes: a box body 4, a monitoring baffle 8 and a limit switch 6.

[0031] The box body 4 is arranged on the side of the second upper coal dropping pipe 2 facing the direction in which the falling coal is transported, and is used to accommodate and support the entire tear prevention detection device. The connection between the box body 4 and the second upper coal dropping pipe 2 is communicated. The box body 4 has no bottom surface facing the belt direction, and the box body 4 has three side walls in the vertical direction.

[0032] The monitoring baffle 8 has two ends. The upper end of the monitoring baffle 8 is rotatably installed on the side walls of the box body 4 in opposite directions, and the lower end can rotate freely with the upper end.

[0033] The limit switch 6 is connected to the monitoring baffle 8. When a rod-shaped object including ironware and branches falls at the coal dropping port of the belt, the rod-shaped object gets stuck between the belt and the monitoring baffle 8, causing the monitoring baffle 8 to rotate under the thrust, thereby triggering the limit switch 6, and then realizing early detection of foreign objects and avoiding long-term jamming and tearing of the belt by foreign objects.

[0034] The anti-tearing monitoring device for the coal dropping pipe of the belt in this utility model can detect signals at the initial stage of foreign object jamming by setting a detection baffle and a limit switch 6 at the hopper opening at the tail of the conveyor belt, so as to achieve pre-judgment. Compared with the traditional belt tearing protection device, this device can give an early warning when a foreign object jams and rubs between the coal dropping pipe and the belt, so as to achieve pre-judgment and prevent the occurrence of belt tearing.

[0035] According to one or some embodiments of the present utility model, the anti-tearing detection device for the coal dropping pipe of the belt further includes: a baffle crank arm 7. The baffle crank arm 7 has two ends, one end is fixedly connected to the upper end of the monitoring baffle 8, and the other end is in contact with the limit switch 6. When the monitoring baffle 8 rotates, the baffle crank arm 7 rotates following the monitoring baffle 8, and the other end of the baffle crank arm 7 touches the limit switch 6.

[0036] According to one or some embodiments of the present utility model, the anti-tearing detection device for the coal dropping pipe of the belt further includes: a rotating shaft 5. The monitoring baffle 8 is connected in the box body 4 through the rotating shaft 5, and one end of the baffle crank arm 7 is fixedly connected to the rotating shaft 5.

[0037] According to one or some embodiments of the present utility model, the anti-tearing detection device for the coal dropping pipe of the belt further includes: a maintenance manhole door 3. A maintenance manhole door 3 is opened on the side wall of the box body 4 for maintenance personnel to enter the box body 4.

[0038] According to one or some embodiments of the present utility model, the rotating shaft 5 is arranged on the maintenance manhole door 3 and the opposite side wall.

[0039] According to one or some embodiments of the present utility model, the anti-tearing detection device for the coal dropping pipe of the belt further includes: a control unit. The control unit is used to detect whether the limit switch 6 is touched and send out the information that the limit switch 6 is touched.

[0040] According to one or some embodiments of the present utility model, the anti-tearing detection device for the coal dropping pipe of the belt further includes: an alarm device. The alarm device is used to receive the information that the limit switch 6 is touched sent by the control unit and send out an alarm signal.

[0041] According to one or some embodiments of the present utility model, the alarm signal includes: a sound prompt or a flashing light prompt.

[0042] According to one or some embodiments of the present utility model, the box body 4 is rectangular.

[0043] According to one or some embodiments of the present utility model, the monitoring baffle 8 is rectangular.

[0044] Figure 6 It is a schematic diagram showing a rod-shaped object falling into the belt coal chute; Figure 7 It is a schematic diagram showing that when the anti-tearing detection device for the belt coal chute according to the embodiment of the present utility model detects a rod-shaped object.

[0045] As Figure 6 and Figure 7 As shown, the belt moves in the right direction shown in the figure, and the anti-tearing detection device is installed in the coal chute prediction. During use, when a rod-shaped object such as an ironware or a branch falls from the coal outlet of the belt, the lower end of the rod-shaped object runs to the right along with the belt and is inclined. The rod-shaped object abuts against the monitoring baffle 8, causing the monitoring baffle 8 to rotate under the thrust, thereby triggering the limit switch 6, and then detecting that a foreign object is stuck, so early monitoring of foreign objects can be achieved, and the belt can be prevented from being torn due to long-term jamming of foreign objects.

[0046] The above description is only an exemplary embodiment of the present utility model and is not used to limit the protection scope of the present utility model. The protection scope of the present utility model is determined by the appended claims.

Claims

1. An anti-tear detection device for a belt coal drop pipe, characterized in that: The belt coal drop pipe comprises a first upper coal drop pipe and a second upper coal drop pipe which are arranged above the belt and arranged from top to bottom. The belt for receiving and transporting the fallen coal is arranged horizontally and transversely. The anti-tearing detection device is arranged on the side of the second upper coal drop pipe facing the direction in which the fallen coal is transported. The anti-tearing detection device comprises: A box body, which is arranged on the side of the second upper and lower coal pipe facing the direction in which the coal is transported, and is used to accommodate and support the entire anti-tearing detection device. The box body is in communication with the connection of the second upper and lower coal pipe. The box body has no bottom surface facing the belt direction, and has three vertical side walls; A monitoring baffle, the monitoring baffle having two ends, the upper end of the monitoring baffle being rotatably mounted on the side wall of the box in the opposite direction, and the lower end being freely rotatable with the upper end; A limit switch, wherein the limit switch is connected to the monitoring baffle. When a rod-like object such as an iron or a branch falls from the belt coal outlet, the rod-like object is stuck between the belt and the monitoring baffle, causing the monitoring baffle to rotate under thrust, thereby triggering the limit switch, thereby realizing early detection of foreign objects and preventing the belt from being stuck and torn for a long time. A control unit is used to detect whether the limit switch is touched and send out information that the limit switch is touched.

2. The anti-tear detection device for a belt coal dropping pipe according to claim 1, characterized in that: Also includes: The baffle arm has two ends, one end is fixedly connected to the upper end of the monitoring baffle, and the other end is in contact with the limit switch. When the monitoring baffle rotates, the baffle arm rotates with the monitoring baffle, and the other end of the baffle arm touches the limit switch.

3. The anti-tear detection device for a belt coal dropping pipe according to claim 2, characterized in that: Also includes: A rotating shaft, wherein the monitoring baffle is connected to the box body through the rotating shaft, and one end of the baffle arm is fixedly connected to the rotating shaft.

4. The anti-tear detection device for a belt coal dropping pipe according to claim 3, characterized in that: Also includes: A maintenance manhole door is provided on the side wall of the box body, and is used by maintenance personnel to enter the box body for maintenance.

5. The anti-tear detection device for a belt coal dropping pipe according to claim 4, characterized in that: The rotating shaft is arranged on the inspection manhole door and the opposite side wall.

6. The tear-proof detection device for a belt coal dropping pipe according to claim 5, characterized in that: Also includes: An alarm device is used to receive the information that the limit switch is triggered from the control unit and send out an alarm signal.

7. The anti-tear detection device for a belt coal dropping pipe according to claim 6, characterized in that: The alarm signal includes: sound prompt or flashing light prompt.

8. The tear-proof detection device for a belt coal dropping pipe according to claim 1, characterized in that: The box body is in the shape of a cuboid.

9. The anti-tear detection device for a belt coal dropping pipe according to claim 1, characterized in that: The monitoring baffle is rectangular.

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