Front-mounted air distribution dust control system for continuous excavation face

Abstract

The utility model provides a front-mounted air distribution and dust control system for a continuous excavation face, and solves the problems that ventilation is difficult to carry out in time, a large amount of gas is easy to accumulate, and safety risks are caused in the deep mining process. The device comprises a continuous tunneling machine and a compressed air device which are located on a continuous tunneling working face, a dust removal fan is arranged in the side, away from the compressed air device, of the continuous tunneling machine, a dust concentration sensor and a gas concentration sensor are arranged at the untunneled right-angle corner of the continuous tunneling working face, and the compressed air device comprises a compressed air cylinder, an air limiter and an air flow scatterer which are sequentially connected. Air flow sequentially passes through the air pressing barrel, the air limiter and the air flow scatterer to be blown to a mining area, and then passes through the dust concentration sensor and the gas concentration sensor to enter the dust removal fan. According to the system, the size and direction of air flow are changed through the air limiter, the wall-attached air holes and the air flow scatterer, gas accumulation at corners and incapability of timely dust removal by the dust removal fan are avoided, and the risks of gas explosion and transportation of a large amount of dust to a rear operation area are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of continuous excavation work, in particular to a wind distribution dust control system in front of a continuous excavation work surface. Background Art

[0002] As mining depth increases, the safety issues of dust pollution and gas explosions also increase. High concentrations of dust and gas seriously affect the safe mining of coal mines. When they reach a certain concentration, serious explosion accidents are likely to occur when encountering open flames. At the same time, workers who work in a high-concentration dust environment for a long time are prone to pneumoconiosis, which has attracted great attention from the country and even society.

[0003] The coal cutting and excavation process of a continuous excavator is mainly divided into two steps: grooving and stacking. After the grooving step is completed, the continuous excavator retreats and adjusts to the other side of the tunnel to carry out the stacking step of cutting the remaining coal wall. During the period from the start of the grooving step to the completion of the stacking step, the edge of the coal wall that is not cut is difficult to ventilate in time because the coal wall blocks the wind flow, which can easily cause a large amount of gas accumulation and cause safety risks. It is urgent to propose an air distribution and dust control device with adjustable air flow and direction. Utility Model Content

[0004] The utility model aims to solve the above problems in the prior art and proposes a wind-dividing dust control system in front of a continuous excavation working surface.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a wind distribution dust control system in front of a continuous excavation working face, comprising a continuous excavator and an air pressure device located on one side of the continuous excavation working face, a dust removal fan is built-in on the side of the continuous excavator away from the air pressure device, a dust concentration sensor and a gas concentration sensor are arranged at the unexcavated right-angle corner of the continuous excavation working face, the air pressure device comprises an air pressure cylinder, an air limiter and an air flow scatterer connected in sequence, the air flow passes through the air pressure cylinder, the air limiter and the air flow scatterer in sequence and blows toward the mining area, and then passes through the dust concentration sensor and the gas concentration sensor into the dust removal fan.

[0006] In the above-mentioned wind-dividing dust control system facing the continuous excavation working face, the compressed air cylinder has an air inlet end and an air outlet end, and a plurality of wall-attached air holes are opened on the circumferential cylinder wall of the air outlet end, and the plurality of wall-attached air holes are arranged in a circular array.

[0007] In the above-mentioned wind-dividing dust control system facing the continuous excavation working face, the wind limiter is connected to the air outlet port of the compressed air cylinder, and the wind limiter includes a superimposed fixed plate and a sliding plate, and the fixed plate and the sliding plate are both provided with a plurality of arc-shaped air holes, and the arc-shaped air holes of the fixed plate and the arc-shaped air holes of the sliding plate are cross-distributed; a plurality of limiting columns are arranged in a circumferential ring array on the surface of the fixed plate, and a plurality of gears are evenly protruded around the circumference of the sliding plate, and the gears are correspondingly arranged between two adjacent limiting columns, and a magnetic fixing ring is supported on the end heads of the plurality of limiting columns, and the sliding plate is clamped between the fixed plate and the magnetic fixing ring to form a rotating connection.

[0008] When the sliding plate rotates relative to the fixed plate, the arc-shaped air holes of the fixed plate are connected to the arc-shaped air holes of the sliding plate. At this time, the air limiter provides radial airflow, and the ventilation volume of the radial airflow of the air limiter is controlled by adjusting the connection area. The angle range between every two adjacent limit columns is used to control the swing angle of the gear, that is, to limit the forward and reverse rotation angle of the sliding plate.

[0009] In the above-mentioned wind-dividing dust control system for the continuous excavation working face, a mounting ring is fixedly arranged on the outer side of the fixed disk, a driving motor is fixedly arranged inside the mounting ring, a driving wheel is fixedly sleeved on the driving shaft of the driving motor, and a belt is sleeved between the driving wheel and the outer periphery of the gears. The driving motor is started to make the driving shaft rotate forward / reversely, and through the action of friction, the belt synchronously transmits the rotation to the gears, thereby realizing the synchronous forward / reverse operation of the sliding disk.

[0010] In the above-mentioned wind-dividing dust control system facing the continuous excavation working surface, the fitting formula of the rotation angle θ of the sliding disk and the dust concentration C and gas concentration W is:

[0011]

[0012] Through the angle range setting of two adjacent limit columns, the value range of the rotation angle θ is between 0° and 45°. When the value of the rotation angle θ is negative, the rotation angle θ is 0. The rotation angle θ calculated last time is 1 and the rotation angle θ calculated last time 2 , and the actual rotation angle θ is obtained 0 The calculation formula is:

[0013] θ 0 =θ 2 -θ 1 ;

[0014] Among them, θ 0 The positive and negative of θ represents the direction of rotation. 0 Positive means clockwise rotation, θ 0 Negative means counterclockwise rotation; θ 0 The value represents the actual rotation angle.

[0015] In the above-mentioned wind distribution and dust control system for the continuous excavation working surface, the magnetic fixing ring is magnetically connected to the wind flow diffuser.

[0016] In the above-mentioned wind distribution and dust control system facing the continuous excavation working face, the wind flow diffuser includes a supporting iron net, the supporting iron net is attracted to the magnetic fixing ring, and a wind dispersion cover is provided on the outer ring edge of the supporting iron net.

[0017] In the above-mentioned wind distribution and dust control system in front of the continuous excavation working face, the supporting iron net includes a plurality of supporting iron rods and connecting iron rings. The supporting iron rods and the connecting iron rings are cross-connected and fixedly connected to form a trumpet-shaped frame. The cross holes between the supporting iron rods and the connecting iron rings are hollow structures. The hollow structure is adopted to reduce the weight of the overall supporting iron net.

[0018] In the above-mentioned wind distribution and dust control system in front of the continuous excavation working face, the wind dispersion hood includes an arc-shaped cover shell with a hollow structure, a plurality of scattering wind holes are opened on the arc-shaped cover shell, large-diameter scattering wind holes are arranged on the arc-shaped cover shell close to the continuous excavator side, and small-diameter scattering wind holes are arranged on the side away from the continuous excavator. The circular edge of the arc-shaped cover shell is fixedly connected to the large-diameter opening of the trumpet-shaped frame supporting the iron net, the large-diameter opening of the trumpet-shaped frame faces the mining area, and the scattering wind holes on the arc-shaped cover shell face the mining area.

[0019] Compared with the existing technology, the wind-distributed dust control system in front of the continuous excavation working face has the following beneficial effects:

[0020] The utility model can cooperate with the air compressor, air limiter, wind flow scatterer and dust removal fan, and intelligently adjust the air volume of the radial air flow of the air compressor according to the feedback values ​​of the dust concentration sensor and the gas concentration sensor through the underground Wi-Fi network, so as to achieve effective treatment of dust and gas generated by coal cutting; the size and direction of the air flow are changed by the air limiter, the wall-attached air hole and the wind flow scatterer to avoid gas accumulation in the corners and the dust removal fan from being unable to control dust removal in time, thereby reducing the risk of gas explosion and large-scale migration of dust to the rear operating area.

[0021] The system can achieve uniform distribution of airflow on the excavation face, avoid gas accumulation, and ensure fresh airflow in the working area. The method is simple to operate and the equipment is easy to install. It has the advantages of safety, small workload, and broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a top view of the continuous excavation working surface in the utility model.

[0023] Figure 2 It is an axonometric view of the wind limiter in the utility model.

[0024] Figure 3It is an axonometric view of the fixed disk in the utility model.

[0025] Figure 4 It is an axonometric view of the sliding disk in the utility model.

[0026] Figure 5 It is a three-dimensional diagram of the wind diffuser cover in the utility model.

[0027] Figure 6 It is a side view of the wind flow diffuser in the utility model.

[0028] Among them, 1. continuous excavation working face; 2. continuous excavator; 3. dust removal fan; 4. air pressure cylinder; 4a. wall-attached air hole; 5. wind limiter; 5a. fixed plate; 5b. sliding plate; 5c. driving motor; 5d. belt; 5e. gear; 5f. arc-shaped air hole; 5g. limiting column; 5h. magnetic fixing ring; 6. wind diffuser; 6a. wind hood; 6b. scattering air hole; 6c. supporting iron rod; 6d. connecting iron ring; 7. dust concentration sensor; 8. gas concentration sensor. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 1-Figure 6 As shown, a front-end wind-distribution dust control system for a continuous excavation working face includes a dust removal fan 3, a pressure air cylinder 4, a wind limiter 5, a wind flow diffuser 6, a sensor 7, etc. A continuous excavation machine 2 and a pressure air cylinder 4 are provided in the continuous excavation working face 1. A dust removal fan 3 is built into the side of the continuous excavation machine 2 away from the pressure air cylinder 4. A wind limiter 5 is provided at the end of the pressure air cylinder 4. A wall-attached air hole 4a is provided at the front wind cylinder of the wind limiter 5. The wind limiter 5 can be magnetically connected to the wind flow diffuser 6 through a magnetic fixing ring 5h. A dust concentration sensor 7 and a gas concentration sensor 8 are provided at the right-angle corner where the continuous excavation working face 1 is not excavated.

[0031] Furthermore, Figure 2 As shown, the wind limiter 5 mainly includes a fixed plate 5a, a sliding plate 5b, a driving motor 5c and a belt 5d. The fixed plate 5a is closely fitted with the sliding plate 5b through a limiting column 5g and a magnetic fixing ring 5h; the side of the fixed plate 5a away from the continuous excavator 2 is fixedly connected to the driving motor 5c, and the driving motor 5c is connected to the sliding plate 5b through a belt 5d.

[0032] Furthermore, Figure 1-Figure 3As shown, the fixed plate 5a is evenly provided with 8 limit posts 5g along the edge of the bottom plate, and the limit posts 5g are used to limit the rotation angle of the sliding plate 5b, and further control the air volume of the radial air flow of the wind limiter 5. The top of the limit post 5g is connected to the magnetic fixing ring 5h, which is used to ensure the close fit between the sliding plate 5b and the bottom plate of the fixed plate 5a on the one hand, to avoid air leakage; on the other hand, the magnetic fixing ring 5h can realize the rapid installation of the wind diffuser 6 through the magnets arranged on the top surface.

[0033] Furthermore, Figure 2 and Figure 4 As shown, the sliding plate 5b has 8 protruding parts with gears 5e arranged on the edge, and each protruding part corresponds to each limiting column 5g in sequence. Through this design, the rotation angle of the sliding plate 5b can be controlled.

[0034] Furthermore, the drive motor 5c is connected to the underground Wi-Fi network. The drive motor 5c has a built-in PLC central processor chip. Through programming input instructions, it can intelligently calculate the required rotation angle θ of the sliding disk 5b according to the dust concentration and gas concentration data received by the underground Wi-Fi network. Due to the effect of the limit column 5g, the value range of the rotation angle θ is 0° to 45°. Therefore, for the programming input instructions of the PLC central processor chip, it should be set to realize the function of driving the belt to rotate clockwise or counterclockwise. For example, when the result of a calculation is 40°, the drive motor 5c should be able to drive the belt 5d to rotate clockwise by 40°; and when the result of another calculation is 10°, the drive motor 5c should be able to drive the belt 5d to rotate counterclockwise by 30° to achieve the desired purpose. According to the received dust concentration and gas concentration, the actual rotation time of the drive motor 5c is set to rotate once every 15 minutes. The whole process of real-time regulation of the radial air outlet of the compressed air cylinder 4 according to the dust concentration and gas concentration does not require human intervention, realizing automatic and intelligent operation.

[0035] Furthermore, Figure 2 As shown, the belt 5d connects the driving motor 5c and the gears 5e of the sliding plate 5b, and the gears 5e are arranged to fit with the belt 5d, and the driving motor 5c drives the belt 5d to realize the rotation of the sliding plate 5b.

[0036] Furthermore, Figure 2-Figure 4 As shown, the fixed plate 5a and the sliding plate 5b are both provided with arc-shaped air holes 5f, and the arc-shaped air holes 5f are used to provide radial airflow for the wind limiter 5. The arc-shaped air holes 5f of the fixed plate 5a and the sliding plate 5b are arranged to be cross-distributed, and the size of the ventilation area of ​​the arc-shaped air holes 5f can be adjusted by rotating the sliding plate 5b, thereby further controlling the ventilation volume of the radial airflow of the wind limiter 5.

[0037] Furthermore, Figure 1As shown, the continuous excavation working face 1 is provided with a dust concentration sensor 7 and a gas concentration sensor 8. The dust concentration sensor 7 and the gas concentration sensor 8 can be used to detect the concentration of dust or gas in the vicinity in real time, and transmit the dust or gas concentration to the drive motor 5c in real time through the underground Wi-Fi network. The drive motor 5c intelligently obtains the rotation angle θ of the sliding disk 5b through the built-in PLC central processor chip. For example, when the gas concentration sensor 8 transmits that the gas concentration is too high, the rotation angle θ of the sliding disk 5b should be calculated to be 0°, so that the ventilation area of ​​the arc-shaped air hole 5f is maximized to prevent the gas from continuing to accumulate; when the gas concentration sensor 8 shows that the gas concentration is low, and the dust concentration sensor 7 shows that the dust concentration is high, if the radial wind flow rate is increased at this time, the dust removal fan 3 will not be able to control the dust removal in time, and a large amount of dust will be blown to the rear. Therefore, the rotation angle θ of the sliding disk 5b should be expanded as much as possible, and the ventilation area of ​​the arc-shaped air hole 5f should be reduced, so that more airflow can flow out axially through the wall-attached air hole 4a, providing more fresh airflow for the rear staff. Therefore, at this time, the rotation angle θ of the sliding disk 5b should be calculated to be above 40°. The empirical fitting formula of the rotation angle θ of the sliding disk 5b and the dust concentration C and gas concentration W is:

[0038]

[0039] Due to the setting of the limit column 5g, the value range of θ is between 0° and 45°. (It is stipulated that when the value of θ is negative, θ is 0.) Therefore, the rotation angle θ calculated last time is 1 and the rotation angle θ calculated last time 2 , and the actual rotation angle θ is obtained 0 The calculation formula is

[0040] θ 0 =θ 2 -θ 1

[0041] θ 0 The positive and negative of θ represents the direction of rotation. 0 Positive means clockwise rotation, θ 0 Negative means counterclockwise rotation; θ 0 The value represents the actual rotation angle.

[0042] Furthermore, the wind diffuser 6 includes a supporting iron net, which is attracted to the magnetic fixing ring, and a wind diffuser 6a is provided on the outer edge of the supporting iron net. The supporting iron net includes a plurality of supporting iron rods 6c and connecting iron rings 6d, and the supporting iron rods 6c and connecting iron rings 6d are cross-connected to form a trumpet-shaped frame, and the cross holes between the supporting iron rods 6c and the connecting iron rings 6d are hollow structures, and the hollow structure is adopted to reduce the weight of the entire supporting iron net.

[0043] The wind dispersion hood 6a includes an arc-shaped cover shell with a hollow structure, and a plurality of scattering wind holes 6b are opened on the arc-shaped cover shell. Large-diameter scattering wind holes 6b are arranged on the arc-shaped cover shell close to the continuous excavator, and small-diameter scattering wind holes 6b are arranged on the side away from the continuous excavator. That is, the aperture of the scattering wind hole 6b on the side close to the side wall of the continuous excavation working face 1 is small, and the apertures are regularly distributed from large to small from the large-diameter scattering wind hole 6b to the small-diameter scattering wind hole 6b.

[0044] The circular edge of the arc-shaped cover shell is fixedly connected to the large diameter opening of the trumpet-shaped frame supporting the iron net, the large diameter opening of the trumpet-shaped frame faces the mining area, and the scattering air holes 6b on the arc-shaped cover shell face the mining area. One end of the supporting iron rod 6c is fixed to the connecting iron ring 6d, and the other end is connected to the scattering wind cover 6a. The wind flow can flow out from the gap of the supporting iron rod 6c to achieve partial wind flow out from the side. The connecting iron ring 6d can achieve a quick connection with the magnetic fixing ring 5h. The entire wind flow diffuser 6 is no more than 1.2m in length and is light in weight, so one operator can quickly install and disassemble it.

[0045] The specific embodiments described herein are merely examples of the spirit of the utility model. A person skilled in the art of the utility model may make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but will not deviate from the spirit of the utility model or exceed the defined scope. Although the utility model is described and described in detail in the drawings and the foregoing description, such descriptions and descriptions are considered to be illustrative or exemplary rather than restrictive. It should be understood that within the scope of the following claims, changes and modifications may be made by a person of ordinary skill. Specifically, the utility model covers additional embodiments having any combination of features from the above-mentioned different embodiments. In terms of the use of the expression "generally" or "substantially", this patent application should be understood to disclose that these features and values ​​are also fully satisfied, that is, there is no aforementioned characterization as "generally" or "substantially".

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A front-end wind-dividing dust control system for a continuous excavation working face, comprising a continuous excavator and an air pressure device located on one side of the continuous excavation working face, characterized in that: A dust removal fan is built into the continuous excavation machine on the side away from the compressed air device, and a dust concentration sensor and a gas concentration sensor are arranged at the unexcavated right-angle corners of the continuous excavation working face. The compressed air device includes a compressed air cylinder, an air limiter and an air flow scatterer connected in sequence. The airflow passes through the compressed air cylinder, the air limiter and the air flow scatterer in sequence and blows toward the mining area, and then passes through the dust concentration sensor and the gas concentration sensor and enters the dust removal fan.

2. The continuous excavation working face front wind distribution dust control system according to claim 1, characterized in that: The compressed air cylinder has an air inlet end and an air outlet end. A plurality of wall-attached air holes are opened on the circumferential cylinder wall of the air outlet end, and the plurality of wall-attached air holes are arranged in a circular array.

3. The front-end wind-distribution dust control system for continuous excavation working surface as claimed in claim 2, characterized in that: The wind limiter is connected to the air outlet port of the compressed air cylinder, and the wind limiter includes a superimposed fixed plate and a sliding plate, and the fixed plate and the sliding plate are both provided with a plurality of arc-shaped air holes, and the arc-shaped air holes of the fixed plate and the arc-shaped air holes of the sliding plate are cross-distributed; a plurality of limiting columns are arranged in a circumferential ring array on the disk surface of the fixed plate, and a plurality of gears are evenly protruded on the circumference of the sliding plate, and the gears are correspondingly arranged between two adjacent limiting columns, and a magnetic fixing ring is supported on the end heads of the plurality of limiting columns, and the sliding plate is clamped between the fixed plate and the magnetic fixing ring to form a rotating connection.

4. The front-end wind-distribution dust control system for continuous excavation working surface as claimed in claim 3 is characterized in that: A mounting ring is fixedly arranged on the outer side of the fixed disk, a driving motor is fixedly arranged in the mounting ring, a driving wheel is fixedly sleeved on the driving shaft of the driving motor, and a belt is sleeved between the driving wheel and the outer periphery of a plurality of the gears.

5. The front-end wind-distribution dust control system for continuous excavation working surface as claimed in claim 3, characterized in that: The fitting formula of the rotation angle θ of the sliding disk and the dust concentration C and gas concentration W is: Through the angle range setting of two adjacent limit columns, the value range of the rotation angle θ is between 0° and 45°. When the value of the rotation angle θ is negative, the rotation angle θ is 0. Through the previously calculated rotation angle θ1 and the next calculated rotation angle θ2, the actual rotation angle θ0 is calculated as follows: θ0=θ2-θ1; Among them, the positive or negative value of θ0 represents the rotation direction, positive θ0 represents clockwise rotation, and negative θ0 represents counterclockwise rotation; the value of θ0 represents the actual rotation angle.

6. The front-end wind-distribution dust control system for continuous excavation working surface as claimed in claim 3, characterized in that: The magnetic fixing ring is magnetically connected to the wind diffuser.

7. The continuous excavation working face front wind distribution dust control system according to claim 6, characterized in that: The wind flow diffuser comprises a supporting iron net, the supporting iron net is attracted to the magnetic fixing ring, and a wind diffuser is provided on the outer ring of the supporting iron net.

8. The front-end wind-distribution dust control system for continuous excavation working surface as claimed in claim 7, characterized in that: The supporting iron net comprises a plurality of supporting iron rods and connecting iron rings. The supporting iron rods and the connecting iron rings are cross-connected and fixedly connected to form a trumpet-shaped frame. The cross holes between the supporting iron rods and the connecting iron rings are hollow structures.

9. The continuous excavation working face front wind distribution dust control system as claimed in claim 8, characterized in that: The wind dispersion hood includes an arc-shaped cover shell with a hollow structure, a plurality of scattering wind holes are opened on the arc-shaped cover shell, large-diameter scattering wind holes are arranged on the arc-shaped cover shell close to the continuous excavator side, and small-diameter scattering wind holes are arranged on the arc-shaped cover shell away from the continuous excavator side, and the circular edge of the arc-shaped cover shell is fixedly connected to the large-diameter opening of the trumpet-shaped frame supporting the iron net.

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