Dust source tracking, spraying and dust settling system

Abstract

The utility model belongs to the technical field of dust falling, and particularly relates to a dust source tracking spraying dust falling system which comprises a plurality of hydraulic supports arranged continuously, the hydraulic supports cooperatively work with a coal mining machine, an emitter is fixedly installed at one end of the coal mining machine, and receiving extension sets are fixedly installed on the outer sides of the hydraulic supports. The receiving extensions are used for receiving signals sent by the transmitters, the receiving extensions transmit data in a wireless relay mode and are in wireless connection with the electric control host, a plurality of spraying devices are arranged on the upper side of the moving range of the coal mining machine, and the electric control host controls the spraying devices to conduct spraying operation at the position where the coal mining machine is located. The transmitter determines the signal coverage range according to the length of the coal mining machine, transmission is carried out in a wireless relay mode through the multiple receiving extensions, and due to the fact that the distance between every two adjacent receiving extensions is short, the device is not affected by underground shielding, pedestrians, light, heat and other environments, and the defect that infrared type frequent error signals exist is overcome.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust suppression, and in particular relates to a dust source tracking and spraying dust suppression system. Background Art

[0002] During underground coal mining, affected by coal hardness, geological structure, shearer type, mining speed and ventilation conditions, the dust concentration at the mining face can reach hundreds or even thousands of milligrams per cubic meter. Dust is extremely harmful to the health of miners and may cause occupational diseases such as pneumoconiosis. It also affects the visibility of the working environment and the normal operation of equipment. Currently, the shearers used in coal mines are generally equipped with a spray system to reduce the dust concentration at the working face. However, the spray system configured on the general shearer has poor dust reduction effect and cannot effectively reduce dust. Utility Model Content

[0003] In order to solve the problems raised in the above background technology, the utility model provides a dust source tracking spraying dust reduction system, which has the characteristics of a transmitter determining the signal coverage range according to the length of the coal mining machine, thereby better realizing the tracking spraying work by controlling different spraying devices according to the movement of the coal mining machine.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a dust source tracking spraying dust reduction system, comprising a plurality of continuously arranged hydraulic supports, the hydraulic supports working in conjunction with a coal mining machine, a transmitter fixedly installed at one end of the coal mining machine, and receiving extensions fixedly installed on the outsides of the plurality of hydraulic supports, the receiving extensions being used to receive signals sent by the transmitter, data being wirelessly relayed between the plurality of receiving extensions and wirelessly connected to an electronic control host, a plurality of spraying devices being arranged on the upper side of the moving range of the coal mining machine, the electronic control host controlling the plurality of spraying devices to perform spraying operations at the location of the coal mining machine, and the transmitter determining the signal coverage range according to the length of the coal mining machine.

[0005] As a preferred embodiment of the dust source tracking and spraying dust reduction system of the present invention, the sector coverage range of the transmitter signal is determined according to the distance between the transmitter and the receiving extension and the distance between a plurality of receiving extensions.

[0006] As a preferred embodiment of the dust source tracking and spraying dust reduction system of the present invention, the transmission range of the wireless signal of the receiving extension is greater than the distance between two adjacent receiving extensions.

[0007] As a preferred embodiment of the dust source tracking and spraying dust reduction system of the present invention, when the receiving extension fails, the target spraying device is forcibly opened through the electronic control host.

[0008] As a preferred embodiment of the dust source tracking spraying dust reduction system of the present invention, several additional spraying devices are opened on the downwind side of the coal mining machine to perform follow-up spraying work.

[0009] As a preferred embodiment of the dust source tracking spraying dust reduction system of the present invention, the electronic control host controls the number of additional spraying devices opened on the downwind side of the coal mining machine by remote control.

[0010] As a preferred embodiment of the dust source tracking and spraying dust reduction system of the present invention, the electronic control host forces the opening of several spraying devices by remote control.

[0011] As a preferred embodiment of the dust source tracking and spraying dust reduction system of the present invention, the electronic control host has an online networking function.

[0012] As a preferred embodiment of the dust source tracking and spraying dust reduction system of the present invention, the spraying device sprays biological foam.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Transmission is carried out through wireless relay of several receiving extensions. Since the distance between two adjacent receiving extensions is short, it is not affected by underground obstructions, pedestrians, light, heat and other environmental factors, thus overcoming the disadvantage of frequent false signals of infrared type.

[0015] 2. The transmitter determines the signal coverage range according to the length of the coal mining machine, so as to better realize the tracking spraying work by controlling different spraying devices according to the movement of the coal mining machine;

[0016] 3. Adjust the sector coverage of the transmitter signal according to the distance between the transmitter and the receiving extension, and the distance between several receiving extensions, so as to better realize the tracking spraying work according to the movement of the coal mining machine and control different spraying devices;

[0017] 4. When some of the receiving extensions fail, the signal can still be transmitted to the host normally;

[0018] 5. When the receiving extension fails, the target spraying device will be forced to open through the electronic control host, so as to achieve normal operation of the dust reduction work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model from a first perspective;

[0021] Figure 2 This is a schematic diagram of the overall structure of the utility model from a second perspective;

[0022] Figure 3 It is a schematic diagram of a coal mine working face in the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the additionally opened spraying device in the present invention;

[0024] Figure 5 This is a schematic diagram of signal transmission when a receiving extension fails in the present invention;

[0025] Figure 6 This is a schematic diagram of spraying when the receiving extension fails in the present invention;

[0026] Figure 7 This is a schematic diagram of the control method when the receiving extension fails in the present invention;

[0027] In the picture:

[0028] 1. Hydraulic support; 2. Coal mining machine; 21. Walking support surface; 3. Transmitter; 4. Receiver extension; 5. Electronic control host; 6. Hose; 7. Water inlet pipe; 8. Solenoid valve; 9. Spraying device; 10. Goaf; 11. Area to be mined; 12. Tunnel; 13. Belt conveyor; 14. Equipment train. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 7 As shown:

[0031] A dust source tracking spraying dust suppression system includes a plurality of hydraulic supports 1 arranged in series. The hydraulic supports 1 work in conjunction with a coal shearer 2. The coal shearer 2 and the hydraulic supports 1 cooperate to perform coal mining on the working surface. The coal shearer 2 moves on the walking support surface 21. When the coal shearer 2 finishes cutting a piece of coal, the hydraulic support 1 moves forward according to the set program to prepare for the next coal mining cycle. A certain safety distance is maintained between the coal shearer 2 and the hydraulic support 1, which ensures that the coal shearer 2 has sufficient working space and enables the hydraulic support 1 to effectively support the roof in time. At the same time, in mines with a high degree of automation, the coal shearer 2 and the hydraulic support 1 can achieve a certain degree of linkage through the control system to improve production efficiency and safety. A transmitter 3 is fixedly installed at one end, and a plurality of receiving extensions 4 are fixedly installed on the outside of the hydraulic supports 1. The receiving extensions 4 are used to receive signals sent by the transmitter 3. The plurality of receiving extensions 4 wirelessly relay data and are wirelessly connected to the electronic control host 5. A plurality of spraying devices 9 are provided on the upper side of the moving range of the front and rear rollers of the coal mining machine 2. The electronic control host 5 controls the plurality of spraying devices 9 to spray at the front and rear rollers of the coal mining machine 2. Under normal circumstances, the coal mining machine 2 performs coal cutting operations in front of the hydraulic support 1. As the coal mining machine 2 moves forward, the hydraulic support 1 supports the exposed roof in turn to prevent the roof from collapsing. The dust concentration of the coal mining working face is affected by the hardness of the coal, the geological structure, the type of coal mining machine 2, the mining speed and the ventilation conditions. It can reach hundreds or even thousands of milligrams per cubic meter. The dust is extremely harmful to the health of miners and may cause occupational diseases such as pneumoconiosis. It will also affect the visibility of the working environment and the normal operation of equipment. The coal mining machines 2 currently used in coal mines are generally equipped with a spray system to reduce the dust concentration on the working face. However, the spray system configured on the coal mining machine 2 is generally poor in dust reduction effect and cannot play an effective dust reduction effect. Therefore, an additional dust reduction system is generally equipped to further reduce the dust concentration in the air. At present, a better way is to install a spray device 9 on the hydraulic support 1 for dust reduction. The spray device 9 is generally located above the coal mining machine 2. In order to avoid waste of water resources and a large amount of water accumulation on the working face, the spray device 9 is only sprayed at the position of the coal mining machine 2. , and according to the movement of the coal mining machine 2, different spraying devices 9 are controlled to perform tracking spraying work. The implementation method is generally as follows: a transmitter 3 is installed on the coal mining machine 2, and a receiving extension 4 is installed on the hydraulic support 1. The signal transmission distance sent by the transmitter 3 is limited. Only the receiving extension 4 close to the position of the transmitter 3 can receive the signal. After the receiving extension 4 receives the signal, the receiving extension 4 controls the corresponding spraying device 9 to perform spraying. The spraying device 9 is connected to the hose 6 and is fixed. Each hose 6 is equipped with a solenoid valve 8 connected thereto. The spraying device 9, hose 6, solenoid valve 8 and receiving extension 4 form a spraying system. A spraying system can be installed on each hydraulic support 1, or a spraying system can be set at a certain interval according to demand.The hoses 6 on several spraying systems are all connected through a water inlet pipe 7, and the hose 6 and the water inlet pipe 7 are connected through a three-way valve. Since the lengths of different types of coal mining machines 2 are different, the distances between the front and rear rollers are also different. Therefore, the specific control of several spraying devices 9 to work requires adjusting the signal coverage range of the transmitter 3. The signal coverage range of the transmitter 3 should be greater than the length of the coal mining machine 2. The receiving extension 4 can receive the signal within the signal coverage range of the transmitter 3. After the receiving extension 4 receives the signal, several receiving extensions 4 transmit the signal by wireless relay transmission until the signal is transmitted to the electronic control host 5. The electronic control host 5 controls the electrical components in the spraying system where the receiving extension 4 that receives the signal from the transmitter 3 is located. Magnetic valve 8 opens. After solenoid valve 8 opens, water in water inlet pipe 7 passes through opened solenoid valve 8, hose 6, and spraying device 9 in sequence. Spraying device 9 sprays liquid, and then sprays dust at the location of coal mining machine 2. Therefore, transmitter 3 needs to determine the signal coverage range according to the length of coal mining machine 2. The sector signal coverage range of transmitter 3 can be adjusted by adjusting the angle of external reflector, using directional antenna, and taking advantage of obstacles for signal reflection and shielding. This can achieve adjustment of the sector signal coverage range of transmitter 3, thereby adapting to different types of coal mining machines 2, and adjusting the sector signal coverage range of transmitter 3 according to the distance between transmitter 3 and receiving extension 4, and the distance between several receiving extensions 4.

[0032] The transmission is carried out by wireless relay of several receiving extensions 4. Since the distance between two adjacent receiving extensions 4 is short, it is not affected by the underground obstruction, pedestrians, light, heat and other environmental factors, thus overcoming the disadvantage of frequent false signals of infrared type.

[0033] The electronic control host 5 has multiple communication signal ports and can be used for underground signal transmission in multiple ways. It can automatically detect the actual online extension operation status and operation number and display them in real time. It can also display the address number of the faulty extension. For example, the electronic control host 5 can display the working face length, coal machine length, extension number, extension operation status, extension number of the faulty extension and the current spraying mode. The working face length, coal machine length, extension number and spraying mode can be set on the electronic control host 5 via the remote control. The system parameters can be set according to the actual working face length of the coal mine, the length of the coal mining machine 2 and the operating speed.

[0034] All electrical equipment used in this solution is intrinsically safe and explosion-proof, ensuring safe and efficient coal mining operations;

[0035] like Figure 3As shown, in the coal mine, the tunnel 12 connects various areas. The tunnel 12 leads to the area to be mined 11 in preparation for mining. The goaf 10 is the area formed after the coal is mined. The tunnels 12 around it may need to strengthen support due to the influence of the goaf 10. The area to be mined 11 is connected to other areas through the tunnel 12. During mining, the tunnel 12 is relied on for transportation, ventilation and other operations. The belt conveyor 13 placed in the tunnel 12 is used to transport the coal mined from the coal mining face to the outside.

[0036] Further,

[0037] In an optional embodiment, the transmission range of the wireless signal of the receiving extension 4 is greater than the distance between two adjacent receiving extensions 4 .

[0038] In this embodiment, the receiving extension 4 relays the signal transmission between them, has a built-in rechargeable battery, a red light flashes when the battery is low, and has a service life of not less than one year. The receiving extension 4 is fixed to the hydraulic support 1 through a card holder; the receiving extension 4 has a built-in binary address DIP switch, which means that the installation position is interchangeable, so that it can be used on different supports;

[0039] like Figure 5 As shown in the figure, the receiving extension 4 marked with X represents a fault or low battery and cannot work normally. When one of the receiving extensions 4 fails or has low battery, the receiving extension 4 cannot transmit signals to the adjacent receiving extension 4. Since the signal transmission range of the receiving extension 4 is greater than the distance between the two adjacent receiving extensions 4, the receiving extension 4 can pass through the faulty receiving extension 4 and wirelessly transmit signals to the next receiving extension 4. However, the wireless signal transmission distance of the receiving extension 4 cannot be too large, otherwise it will affect the battery life.

[0040] In an optional embodiment, when the receiving extension 4 fails, the target spraying device 9 is forcibly opened through the electronic control host 5.

[0041] In this embodiment: Figure 6 As shown in the figure, the receiving extension 4 marked with X represents that it cannot work normally. The fan-shaped range shown by the two arrows on the transmitter 3 is the coverage range of the transmitter 3 signal. Take the coal mining machine 2 moving to the left in the figure as an example for explanation. When there is a faulty receiving extension 4 within the coverage range of the transmitter 3, the extension address number of the receiving extension 4 cannot be transmitted to the electronic control host 5, which means that the electronic control host 5 cannot open the solenoid valve 8 in the spraying system where the faulty receiving extension 4 is located. At this time, the electronic control host 5 needs to calculate which specific receiving extension 4 has a fault according to the moving direction of the coal mining machine 2, the signal coverage range of the transmitter 3 and the extension address numbers of the receiving extensions 4 specifically received by the electronic control host 5, and force the electronic control host 5 to open the solenoid valve 8 in the spraying system where the receiving extension 4 is located, so as to achieve the continued operation of the dust reduction work;

[0042] Since each receiving extension 4 has its own extension address number, when the transmitter 3 moves with the coal mining machine 2, the electronic control host 5 will receive different extension address numbers in sequence, and similarly, it will disconnect from different receiving extensions 4 in sequence, thereby calculating the moving direction of the coal mining machine 2 according to the sequence of different extension address numbers received by the electronic control host 5;

[0043] When the launcher 3 moves with the coal mining machine 2, Figure 7 As shown in the figure, there are extension receivers 4 No. 52-55 within the coverage range of the transmitter 3. When the transmitter 3 moves to the left, the transmitter 3 is disconnected from the extension receiver 4 No. 52, and is just wirelessly connected to the extension receiver 4 No. 56. Assuming that the extension receiver 4 No. 56 is faulty at this time, according to the calculation of the electronic control host 5, when the transmitter 3 is disconnected from the extension receiver 4 No. 52, there should be an extension receiver 4 No. 56 that is wirelessly connected to the transmitter 3. However, at this time, the electronic control host 5 does not receive the extension address number of the extension receiver No. 56. It can be determined that the extension receiver 4 No. 56 is faulty at this time. At this time, the electronic control host 5 should forcibly open the solenoid valve 8 in the spraying system where the extension receiver No. 56 is located.

[0044] In an optional embodiment, several additional spraying devices 9 are opened on the downwind side of the coal mining machine 2 to perform follow-up spraying.

[0045] In this embodiment: there is always good ventilation in the fully-mechanized mining working face of the coal mine, and most of it is the wind provided by the wind shaft. The wind can blow out the gas in the fully-mechanized mining working face of the coal mine. Therefore, the wind direction in the fully-mechanized mining working face of the coal mine is fixed. Outside the signal coverage range of the transmitter 3, several additional spraying devices 9 are turned on to work, so that the dust escaping with the wind can be further reduced. According to the wind speed or actual needs, one or more additional spraying devices 9 are turned on, such as Figure 4 As shown, an additional spraying device 9 is represented as N+1 in the figure, and two additional spraying devices 9 are represented as N+2 in the figure. The additionally turned on spraying devices 9 are located on the leeward side of the coal mining machine 2, and the additionally turned on spraying devices 9 also work with the coal mining machine 2, but the receiving extension 4 corresponding to the additionally turned on spraying device 9 is not within the signal coverage range of the transmitter 3. The electronic control host 5 controls the number of additionally turned on spraying devices 9 in the leeward direction of the coal mining machine 2 by remote control, that is, the spraying mode has N+1, N+2 or N+several options.

[0046] In an optional embodiment, the electronic control host 5 forces several spraying devices 9 to open by remote control. In addition to selecting the N+1 and N+2 spraying modes by remote control, any one or more spraying devices 9 can also be forced to work by remote control.

[0047] In an optional embodiment, the electronically controlled host 5 has an online networking function. The electronically controlled host 5 not only has a remote control function, but can also be remotely controlled through networking, and can also remotely obtain operating parameters of the electronically controlled host 5.

[0048] In an optional embodiment, the spraying device 9 sprays biological foam, which can be a microbial foaming agent or a plant extract foaming agent. The biological foam has good coverage and high dust reduction efficiency. The biological foam dust reduction has the advantages of high efficiency, environmental protection, and low corrosion to equipment. It has gradually been valued and applied in coal mine dust reduction, and a foam dust reduction device is set on the equipment train 14.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A dust source tracking spraying dust suppression system, comprising a plurality of hydraulic supports (1) arranged in series, the hydraulic supports (1) working in conjunction with a coal mining machine (2), characterized in that: A transmitter (3) is fixedly installed at one end of the coal mining machine (2), and a plurality of receiving extensions (4) are fixedly installed on the outside of the plurality of hydraulic supports (1). The receiving extensions (4) are used to receive signals sent by the transmitter (3). The plurality of receiving extensions (4) wirelessly relay data and are wirelessly connected to the electric control host (5). A plurality of spraying devices (9) are arranged on the upper side of the moving range of the coal mining machine (2). The electric control host (5) controls the plurality of spraying devices (9) to perform spraying operations at the location of the coal mining machine (2). The transmitter (3) determines the signal coverage range according to the length of the coal mining machine (2).

2. The dust source tracking spraying dust suppression system according to claim 1 is characterized in that: The sector coverage range of the transmitter (3) signal is determined according to the distance between the transmitter (3) and the receiving extension (4) and the distance between a plurality of receiving extensions (4).

3. The dust source tracking spraying dust suppression system according to claim 1 or 2, characterized in that: The transmission range of the wireless signal of the receiving extension (4) is greater than the distance between two adjacent receiving extensions (4).

4. The dust source tracking spraying dust suppression system according to claim 3 is characterized in that: When the receiving extension (4) fails, the target spraying device (9) is forced to open through the electronic control host (5).

5. The dust source tracking spraying dust suppression system according to claim 4, characterized in that: Several additional spraying devices (9) are opened on the downwind side of the coal mining machine (2) to perform follow-up spraying work.

6. The dust source tracking spraying dust suppression system according to claim 5, characterized in that: The electric control host (5) controls the number of additional spraying devices (9) opened in the downwind direction of the coal mining machine (2) by remote control.

7. The dust source tracking spraying dust suppression system according to claim 5, characterized in that: The electric control host (5) forcibly opens a plurality of spraying devices (9) by remote control.

8. The dust source tracking spraying dust suppression system according to claim 1, characterized in that: The electronic control host (5) has an online networking function.

9. The dust source tracking spraying dust suppression system according to claim 1, characterized in that: The spraying device (9) sprays the biological foam.

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