Air curtain isolation device for forming space of driver cab of heading machine

Abstract

The invention belongs to the technical field of mine dust treatment equipment, and relates to an air curtain isolation device for forming a heading machine driver cab space, which integrates an air inlet column, air curtain generation, air flow injection air gathering and air flow guiding, and is equipped with a fresh air supply system. The air inlet columns supply air stably, the air curtain generating device converts transverse air flow into longitudinal air flow through unique guide blades, and a continuous air curtain is formed. The airflow injection gas gathering device accelerates airflow through shunting and diffusion, a low-pressure area is generated, and isolation is enhanced. The airflow guiding device is used for shunting, reversing and reducing the speed of airflow, so that reentrainment of dust is prevented. The fresh air supply system introduces fresh air through an air inlet, a chamber and an air supply opening, a micro-positive pressure area is formed, dust is prevented from entering, and negative pressure is used for discharging. Air flow control and fresh air are combined, dust isolation and air purification of the cab are achieved, the health and working comfort of a driver are guaranteed, the device is suitable for severe environments such as a heading machine, mine dust is effectively treated, and a good working environment is created for the driver.

Description

Technical Field

[0001] The invention belongs to the technical field of mine dust control equipment and relates to an air curtain isolation device used for forming an air curtain in a cab space of a tunneling machine driver. Background Art

[0002] The tunneling roadway is one of the important underground production systems, and its dust production reaches 40%-60%, second only to the coal mining face. Dust is generated in each process of the tunneling machine cutting rock, loading, reloading, and transportation, resulting in an increasing dust concentration in the working environment of the tunneling face. With the continuous increase in the intensity of coal seam mining, especially the improvement of the mechanization level of tunneling and the increase in the number of rock tunnels, dust poses an increasingly serious threat to coal mine production safety and the health of workers. At the same time, with the progress of society and the development of the national economy, people's awareness of labor protection has been continuously enhanced, and the impact of underground dust on workers' health has received more and more attention. Therefore, the study of dust control in the tunneling face is not only an objective requirement of the production site, but also an inevitable trend of social civilization and progress. It is of great significance to achieve the green and sustainable development of my country's coal mines.

[0003] In current production, dust prevention and control at the tunneling driver is the key and difficult point in tunneling dust prevention work. Due to the huge size of the tunneling machine, vortices are formed in front of the driver and on both sides of the driver, making the dust concentration at the tunneling driver much higher than the average dust concentration in the tunnel. Furthermore, the ventilation and control process requires the necessary flow space to carry the dust into the dust suction port (or dust collector inlet) after it is generated. This necessary travel range is the limited space between the tunneling face and the tail of the tunneling machine. The tunneling machine driver active in this space is almost completely exposed to the entire journey of dust being carried by the airflow after it is generated. This problem has become the focus and difficulty of occupational disease prevention and control in the driver's position, and it is a difficult problem to be broken through in the dust prevention work of the entire chain of tunneling construction. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine. An air curtain generator generates an air curtain to prevent external dust-containing airflow from entering the driver's position space. At the same time, a fresh air flow supply device is arranged on the ceiling of the driver's position. Fresh air flow is continuously input into the micro-clean space of the driver's position through the air supply device to keep the driver's position in a clean space at all times.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an air curtain isolation device for forming an air curtain in the cab space of a tunnel boring machine driver, comprising air intake columns arranged around the cab, and an air curtain generating device, a wind flow injection and air gathering device and a wind flow guiding device arranged in sequence from high to low between adjacent air intake columns, an air intake port is arranged at the top of the air intake column, and the air intake column is connected to the air curtain generating device for air supply; the air curtain generating device comprises an air chamber, an air supply groove and a guide vane, and the guide vane is arranged in the air chamber to convert the horizontal wind flow into the longitudinal wind flow to form a continuous air curtain.

[0006] Optionally, the wind flow injection and gas concentration device includes a split jet device and a diffuser, wherein the diffuser is configured as a structure with a larger upper portion and a smaller lower portion, and the split jet device is disposed at the end with a larger opening and below the air supply slot of the air curtain generating device.

[0007] Optionally, the split jet device has a diamond-shaped structure.

[0008] Optionally, the wind flows into the diffuser from the air supply slot of the air curtain generating device, forms a high-speed jet after passing through the diverter jet device, and the high-speed jet is converted into pressure energy through the diffuser, and a low-pressure area is generated, which drives the airflow generated by the air curtain generating device to mix with the high-speed jet to form an air curtain.

[0009] Optionally, the wind flow guiding device includes a diverter device, a reversing plate, a baffle and a slow wind net. The air curtain generated by the wind flow injection and gas gathering device is divided into two air flows through the diverter device. The longitudinal diversion is converted into a transverse diversion through the reversing plate, and then the speed is reduced through the slow wind net to avoid secondary dust caused by high-speed air flow disturbance. The baffle is arranged on the same side as the slow wind net and is arranged on the top of the slow wind net.

[0010] Optionally, the cross-section of the diverter device is fan-shaped.

[0011] Optionally, it also includes an air inlet, a fresh air inlet chamber and a fresh air supply outlet. The air inlet is connected to the fresh air inlet chamber, and the fresh air inlet chamber is connected to the fresh air supply outlet. Fresh air enters the fresh air inlet chamber through the air inlet and is ejected from the fresh air supply outlet to form a slightly positive pressure area to prevent dust from escaping into the cab, and is absorbed into the dust-producing area outside the space through the negative pressure of the wind flow-inducing gas collection device.

[0012] Optionally, when fresh air is continuously injected and reaches a certain speed, the slightly positive pressure area formed in the space can effectively isolate dust and ensure the cleanliness of the air in the cab.

[0013] Optionally, the included angle between the guide vane and the inner side of the air supply slot is 45°, the included angle between the guide vane and the outer side is 87°, and the bending position is located in the middle of the air supply slot.

[0014] The beneficial effects of the present invention are: the present invention couples the isolation effect of the jet air curtain and the fresh air pressure relief effect, thereby realizing effective isolation of external high-concentration dust and continuous supply of internal fresh air, effectively isolating the high-concentration dust environment in the tunnel from the driver's operating space, preventing the dust-laden airflow from disturbing the driver while ensuring that the airflow generated by the device will not disrupt the fluid changes on the working surface and cause secondary dust.

[0015] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 It is an overall schematic diagram of an air curtain isolation device for forming an air curtain in the cab space of a roadheader driver according to the present invention;

[0018] Figure 2 for Figure 1 A cross-sectional view of

[0019] Figure 3 A schematic diagram of an air curtain generator for forming an air curtain isolation device for a cab space of a roadheader driver according to the present invention;

[0020] Figure 4 for Figure 3 A cross-sectional view of

[0021] Figure 5 A schematic diagram of a wind flow injection and air gathering device for forming an air curtain isolation device in the cab space of a roadheader driver according to the present invention;

[0022] Figure 6 This is a working schematic diagram of the wind flow injection and gas gathering device;

[0023] Figure 7 A schematic diagram of an airflow guide device for forming an air curtain isolation device in a cab space of a roadheader driver according to the present invention;

[0024] Figure 8 This is a working schematic diagram of the wind flow guiding device.

[0025] Figure numerals: air intake column 1, air curtain generator 2, wind flow guiding and air gathering device 3, wind flow guiding device 4, fresh air inlet 5, fresh air inlet chamber 6, fresh air supply port 7, sliding door 8; air chamber 2.1, guide vane 2.2, splitter jet device 3.1, diffuser 3.2, splitter device 4.1, reversing plate 4.2, baffle 4.3, wind slowing net 4.4. DETAILED DESCRIPTION

[0026] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and the features in the embodiments can be combined with each other without conflict.

[0027] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] See also Figures 1 to 8, is an air curtain isolation device for forming an air curtain space in a cab of a tunnel boring machine driver, comprising an air intake column 1 arranged around the cab, and an air curtain generating device, a wind flow guiding and gathering device 3 and a wind flow guiding device 4 arranged in sequence from high to low between adjacent air intake columns 1, an air inlet is arranged at the top of the air intake column 1, and the air intake column 1 is connected with the air curtain generating device for air supply; the air curtain generating device comprises an air chamber 2.1, an air supply groove and a guide vane 2.2, the guide vane 2.2 is arranged in the air chamber 2.1, so that the horizontal wind flow is converted into a longitudinal wind flow to form a continuous air curtain, the wind flow guiding and gathering device 3 comprises a split jet device 3.1 and a diffuser 3.2, the diffuser 3.2 is arranged as a large upper and small lower structure, the split jet device 3.1 is arranged at the end with a larger opening and arranged below the air supply groove of the air curtain generating device, and the split jet device 3.1 is a diamond structure. , the wind flow enters the diffuser 3.2 from the air supply slot of the air curtain generating device, forms a high-speed jet after passing through the diverter jet device 3.1, and the high-speed jet is converted into pressure energy through the diffuser 3.2, and a low-pressure area is generated, driving the air flow generated by the air curtain generating device to mix with the high-speed jet to form an air curtain. The wind flow guiding device 4 includes a diverter device 4.1, a reversing plate 4.2, a baffle 4.3 and a slow wind net 4.4. The air curtain generated by the wind flow guiding and gathering device 3 is divided into two air flows through the diverter device 4.1, and the longitudinal diversion is converted into a lateral diversion through the reversing plate 4.2, and then the speed is reduced through the slow wind net 4.4 to avoid secondary dust caused by high-speed air flow disturbance; the baffle 4.3 and the slow wind net 4.4 are arranged on the same side and are arranged At the top of the slow wind net 4.4, the cross-section of the diversion device 4.1 is fan-shaped, and also includes an air inlet, a fresh air inlet chamber 6 and a fresh air supply port 7. The air inlet is connected to the fresh air inlet chamber 6, and the fresh air inlet chamber 6 is connected to the fresh air supply port 7. The fresh air enters the fresh air inlet chamber 6 through the air inlet, and is then ejected from the fresh air supply port 7 to form a slightly positive pressure area to prevent dust from escaping into the cab, and is absorbed into the dust-producing area outside the space through the negative pressure of the wind flow-inducing gas gathering device 3. When the fresh air is continuously injected and reaches a certain speed, the slightly positive pressure area formed in the space can effectively isolate the dust to ensure the cleanliness of the air in the cab. The angle between the guide vane 2.2 and the inner side of the air supply slot is 45°, and the angle between the outer side and the guide vane is 87°. The bending position is located in the middle of the air supply slot.

[0030] The working principle of the present invention is:

[0031] First, the air inlet column 1, as the main source of airflow, provides a stable airflow supply for the air curtain generating device 2 and the wind flow guiding and gathering device 3. After entering the air chamber 2.1 of the air curtain generating device 2, the airflow encounters the carefully designed guide vane 2.2. The special structure of the guide vane 2.2 (the inner angle is 45°, the outer angle is 87°, and the bending position is exactly located in the middle of the air supply slot) makes the original horizontal airflow be cleverly transformed into a longitudinal wind flow, thereby forming a continuous air curtain. This design not only improves the utilization rate of the airflow, but also enhances the isolation effect of the air curtain.

[0032] Subsequently, the airflow enters the wind flow injection and gas gathering device 3. Here, the wind flow first passes through the split jet device 3.1. Since the jet outlet is designed to be small, according to the principle of fluid dynamics, the fluid velocity will increase rapidly to form a high-speed jet. This high-speed jet then enters the diffuser 3.2, whose structural design of large top and small bottom allows the kinetic energy of the high-speed fluid to be effectively converted into pressure energy and produces a low-pressure area. This low-pressure area cleverly drives the airflow generated by the air curtain generator to mix with the high-speed jet, which not only reduces the diffusion of the airflow generated by the air curtain generator, but also increases the speed of the airflow ejected from the wind flow injection and gas gathering device, thereby forming a stronger air curtain.

[0033] The mixed high-speed fluid passes through the flow diversion device 4.1 in the wind flow guide device 4 and is accurately divided into two air flows. Under the action of the reversing plate 4.2, the two air flows are transformed from longitudinal diversion to transverse diversion. Then, they are decelerated by the slow wind net 4.4, avoiding the secondary dust problem caused by the high-speed air flow disturbing the fluid change on the working surface.

[0034] At the same time, the device is also equipped with a fresh air supply system. The fresh air enters the fresh air intake chamber 6 through the air inlet 5, and is finally ejected from the fresh air supply port 7. With the continuous injection of fresh air, and when the fresh air reaches a certain speed, a large micro-positive pressure area will be formed in the cab space. The existence of this micro-positive pressure area makes it difficult for a small amount of dust escaping into the space to enter the cab due to the positive pressure in the space. At the same time, the negative pressure absorption effect of the wind flow injection and gas collection device 3 further attracts the dust airflow to the dust-producing area outside the space, thereby ensuring the cleanliness of the air in the cab.

[0035] In summary, the air curtain isolation device achieves effective isolation and air purification of the cab space of the tunnel boring machine driver through the joint operation of the air intake column 1, the air curtain generating device 2, the wind flow injection and air gathering device 3 and the wind flow guiding device 4, as well as the auxiliary cooperation of the fresh air supply system. This design not only improves the quality of the driver's working environment, but also ensures the driver's health.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. An air curtain isolation device for forming an air curtain in the cab space of a tunnel boring machine, characterized in that: It includes air intake columns arranged around the cab, and an air curtain generating device, a wind flow guiding and gathering device and a wind flow guiding device arranged in sequence between adjacent air intake columns from high to low. An air intake port is arranged on the top of the air intake column, and the air intake column is connected with the air curtain generating device for air supply; The air curtain generating device includes an air chamber, an air supply slot and a guide vane. The guide vane is arranged in the air chamber to convert the horizontal air flow into the longitudinal air flow to form a continuous air curtain.

2. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 1, characterized in that: The wind flow injection and air concentration device comprises a split jet device and a diffuser. The diffuser is arranged as a structure with a larger upper portion and a smaller lower portion. The split jet device is arranged at the end with a larger opening and is arranged below the air supply slot of the air curtain generating device.

3. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 2, characterized in that: The split-flow jet device has a diamond-shaped structure.

4. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 2, characterized in that: The wind flows into the diffuser from the air supply slot of the air curtain generating device, and forms a high-speed jet after passing through the split jet device. The high-speed jet is converted into pressure energy through the diffuser, and a low-pressure area is generated, which drives the airflow generated by the air curtain generating device to mix with the high-speed jet to form an air curtain.

5. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 1, characterized in that: The wind flow guiding device includes a diverter device, a reversing plate, a baffle and a slow wind net. The air curtain generated by the wind flow injection and gas gathering device is divided into two air flows through the diverter device. The longitudinal diversion is converted into lateral diversion through the reversing plate, and then the speed is reduced through the slow wind net to avoid secondary dust caused by high-speed air flow disturbance. The baffle is arranged on the same side as the slow wind net and is arranged on the top of the slow wind net.

6. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 5, characterized in that: The cross section of the diverter is fan-shaped.

7. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 1, characterized in that: It also includes an air inlet, a fresh air inlet chamber and a fresh air supply outlet. The air inlet is connected to the fresh air inlet chamber, and the fresh air inlet chamber is connected to the fresh air supply outlet. Fresh air enters the fresh air inlet chamber through the air inlet and is then ejected from the fresh air supply outlet to form a slightly positive pressure area, preventing dust from escaping into the cab and being absorbed into the dust-producing area outside the space through the negative pressure of the wind flow-inducing and air-gathering device.

8. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 1, characterized in that: When fresh air is continuously injected and reaches a certain speed, the slightly positive pressure area formed in the space can effectively isolate dust and ensure the cleanliness of the air in the cab.

9. The air curtain isolation device for forming an air curtain in the driver's cab space of a tunnel boring machine according to claim 1, characterized in that: The included angle between the guide vane and the inner side of the air supply slot is 45°, the included angle between the guide vane and the outer side is 87°, and the bending position is located in the middle of the air supply slot.

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