Gas-water integrated annular spraying device for roadheader

Abstract

The invention belongs to the technical field of fully-mechanized excavating equipment, and relates to a gas-water integrated annular spraying device for a fully-mechanized excavating machine, which mainly comprises a water inlet joint, a gas inlet joint, a gas-water sleeve, a gas-water nozzle, a connecting sheet, an arc-shaped connecting plate and an arc-shaped baffle. The two arc-shaped spraying devices are connected into a ring and are fixed at the end part of the cutting arm of the heading machine, so that a cutting dust production source is covered in a full range. According to the air-water integrated design, compressed air and supplied water of a driving working face are used as air-water sources, enter the corresponding air-water chambers through the air inlet connector and the water inlet connector and then are in threaded connection with the air-water nozzles through the air-water sleeves to form the air-water integrated spraying device. Water is changed into atomized particles through the liquid cavity, meanwhile, the high-pressure gas is mixed with the atomized particles under the action of the air distribution opening, and conical water mist is sprayed out. The dust suppression device is simple in structure, convenient to install, remarkable in dust suppression effect, capable of improving the safety and the environmental protection property of tunneling operation and suitable for being used by various fully-mechanized excavating machines.

Description

Technical Field

[0001] The invention belongs to the technical field of comprehensive excavation equipment and relates to an air-water integrated ring-mounted spray device used on a comprehensive excavation machine. Background Art

[0002] Dust reduction in the excavation face has always been the focus of underground work, and tunnel excavation is the main dust source in the mine. The dust generated in the comprehensive excavation face mainly comes from the contact between the cutting teeth of the tunneling machine and the coal wall. In the process of penetrating into the coal wall, as the cutting teeth leave the coal wall, the dense core is broken into powder to form coal powder, that is, the coal rock is crushed and rubbed by the cutting teeth to produce dust, accounting for more than 80% of the total dust generation. There is also dust generated by the collision between the machine and the ground when the coal block collapses, and the loading process and machine handling can also generate dust. Coal powder flies with the rotation of the cutting drum, which will cause the coal powder to diffuse and flow in the air. The ventilation of the working face, the rotation of the cutting head and the wind flow formed by the falling coal will also generate dust. If the dust is not removed at the source, the dust will spread throughout the tunnel with the diffusion of the wind flow of the working face, and the tunnel of the entire excavation face will be polluted. This will not only threaten the health of workers, but more seriously, when the diameter of the coal dust is less than 0.75mm and reaches a certain concentration, it will cause an explosion accident.

[0003] The current roadheader spray dust reduction methods and dust reduction equipment generally have low dust reduction efficiency. Traditional roadheader external spray mainly uses pressure-type nozzles, which are arranged in a straight line on the upper side of the end of the blaster head rocker arm, resulting in poor nozzle atomization effect and a small coverage range. In addition, the pressure-type nozzle generally uses a high-pressure water pump to generate high-pressure water. The required booster device is relatively large in size and heavy in weight, and is not convenient to operate, which affects the dust reduction effect of high-pressure spray. In addition, although the increase in spray flow caused by high water pressure can improve the dust reduction rate, it will increase the moisture content of the coal and affect the quality of the coal, causing deformation of the tunnel and slipping of the transport belt. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an air-water integrated ring-mounted spray device for a multi-purpose excavator to solve the existing problems.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an integrated air-water ring-mounted spray device for a comprehensive tunneling machine, comprising two arc-shaped spray devices connected in a ring and fixed to the end of the cutting arm of the tunneling machine, each arc-shaped spray device comprising an arc-shaped air-water casing, and a plurality of air-water nozzles evenly distributed on the pipe along the air-water casing; an arc-shaped connecting plate is also provided on the inner side of the air-water casing, and a mounting hole is provided on the arc-shaped connecting plate for mounting and fixing on the end of the cutting arm of the tunneling machine.

[0006] Optionally, an arc-shaped baffle plate semi-wrapping the air-water nozzle is further provided above the air-water casing, and a through hole for injection is provided at the top of the arc-shaped baffle plate at a position corresponding to the air-water nozzle.

[0007] Optionally, the ends of the arc-shaped spray devices are correspondingly provided with connecting pieces and connecting holes for connecting two arc-shaped spray devices into a ring.

[0008] Optionally, the air-water casing includes a water inlet arc chamber and an air inlet arc chamber, which are respectively connected to a water inlet joint and an air inlet joint provided on the air-water casing.

[0009] Optionally, the air-water nozzle is connected to the water pipe internal thread and air pipe external thread of the air-water sleeve through the internal thread and external thread of the air-water sleeve to form an integrated air-water spray device.

[0010] Optionally, a liquid cavity, an air chamber, an air outlet, an atomizing cavity and a nozzle are provided inside the air-water nozzle. Water passes through the liquid cavity and is transformed into small atomized particles through the water outlet. At the same time, high-pressure gas passes through the air chamber and is mixed with the atomized particles in the atomizing cavity under the action of the air outlet, and is ejected from the nozzle to form a conical water mist.

[0011] Optionally, the water outlet is arranged in a circle, and the air outlet includes an air outlet arranged in a circle outside the water outlet and an air outlet arranged in a central position of the circle of the water outlet.

[0012] The beneficial effects of the present invention are as follows: the air-water integrated ring-mounted spray device for a comprehensive excavation machine uses the compressed air of the excavation working face as the power, mixes with the water flow and sprays it out in an atomized form, sprays all-round coverage of the upper and lower parts of the cutting drum, ensures that the atomization range covers the dust source of the excavation machine cutting while reducing the amount of water used. During the spraying process, the nozzle is protected by the annular cover to prevent the roof from breaking and frequently falling off to damage the nozzle, thereby improving the dust reduction efficiency.

[0013] 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

[0014] 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:

[0015] Figure 1 It is a schematic diagram of the structure of the spray device of the present invention after being connected into a ring;

[0016] Figure 2 It is the installation schematic diagram of the present invention;

[0017] Figure 3 It is a schematic diagram of the spray device of the present invention;

[0018] Figure 4 for Figure 3 A top view of

[0019] Figure 5 for Figure 4 GG cross-sectional view;

[0020] Figure 6 for Figure 5 A magnified image of ;

[0021] Figure 7 It is a schematic diagram of the air-water nozzle;

[0022] Figure 8 for Figure 7 AA section view;

[0023] Fig. 9 for Figure 7 BB cross-sectional view.

[0024] Figure markings: water inlet joint 1, air inlet joint 2, air-water sleeve 3, air-water nozzle 4, connecting piece 5, arc-shaped connecting plate 6, arc-shaped baffle 7, water inlet arc-shaped chamber 3-1, air inlet arc-shaped chamber 3-2, internal pipe thread 3-3, external pipe thread 3-4, internal water pipe thread 4-1, external air pipe thread 4-2, liquid chamber 4-3, air chamber 4-4, air outlet 4-5, water outlet 4-6, atomizing chamber 4-7, nozzle 4-8, connecting hole 5-1, mounting hole 6-1. DETAILED DESCRIPTION

[0025] 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 features in the embodiments can be combined with each other without conflict.

[0026] 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.

[0027] 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.

[0028] See also Figures 1 to 9 , is an integrated air-water ring-mounted spray device for a comprehensive excavation machine, comprising two arc-shaped spray devices connected to form a ring and fixed to the end of the cutting arm of the excavator, each arc-shaped spray device comprising an arc-shaped air-water casing 3, and a plurality of air-water nozzles 4 uniformly distributed on the pipe along the air-water casing 3; an arc-shaped connecting plate 6 is also provided on the inner side of the air-water casing 3, and a mounting hole 6-1 for mounting and fixing on the end of the cutting arm of the excavator is opened on the arc-shaped connecting plate 6, and an arc-shaped baffle 7 semi-wrapped The air-water nozzle 4 is also arranged above the air-water casing 3, and a through hole for injection is opened at the top of the arc-shaped baffle 7 at the corresponding position of the air-water nozzle 4, and the end of the arc-shaped spray device is correspondingly provided with a connecting piece 5 and a connecting hole 5-1, which are used to connect the two arc-shaped spray devices into a ring, and the air-water casing 3 comprises a water inlet arc chamber 3-1 and an air inlet arc chamber 3-2, respectively connected with a water inlet joint 1 and an air inlet joint 2 arranged on the air-water sleeve 3, the air-water nozzle 4 is connected with the water pipe internal thread 4-1 and the air pipe external thread 4-2 of the air-water sleeve 3 through the internal pipe thread 3-3 and the external pipe thread 3-4 of the air-water sleeve 3, to form an air-water integrated spray device, the air-water nozzle 4 is provided with a liquid cavity 4-3, an air chamber 4-4, an air outlet 4-5, an atomizing cavity 4-7 and a nozzle 4-8, water passes through the liquid cavity 4-3 and is converted into small atomized particles through the water outlet 4-6, and at the same time, high-pressure gas passes through the air chamber 4-4 and is mixed with the atomized particles in the atomizing cavity 4-7 under the action of the air outlet 4-5, and is ejected from the nozzle 4-8 to form a conical water mist, the water outlet 4-6 is provided with a circle, and the air outlet 4-5 includes a circle arranged on the periphery of the water outlet 4-6, and a center position arranged on the circle of the water outlet 4-6.

[0029] The working principle of the present invention is as follows:

[0030] Gas-water mixing and atomization: Water enters the water inlet arc chamber 3-1 through the water inlet joint 1, passes through the liquid chamber 4-3, and finally becomes small atomized particles through the water outlet 4-6. At the same time, high-pressure gas enters the air inlet arc chamber 3-2 through the air inlet joint 2, passes through the air chamber 4-4, and becomes multiple extremely strong airflows under the action of the air outlet 4-5. These extremely strong airflows are mixed with the atomized particles injected into the atomization chamber 4-7 to form a mixed airflow.

[0031] Spray formation and output: The mixed airflow is ejected through nozzles 4-8 to form a conical water mist. The conical water mist covers the dust source cut by the tunnel boring machine, effectively suppressing the flying of dust.

[0032] Protection and fixation: The arc-shaped baffle 7 protects the output end of the spray device to prevent the spray from being directly sprayed onto unnecessary areas or equipment. The arc-shaped connecting plate 6 and the mounting holes 6-1 thereon ensure that the spray device is firmly fixed to the end of the cutting arm of the tunnel boring machine, ensuring the stability and reliability of the spray device during the tunneling process.

[0033] In summary, the air-water integrated ring-mounted spray device achieves effective dust suppression on the dust source produced by cutting of the tunnel boring machine through its ingenious structural design and working principle, thereby improving the safety and environmental protection of tunnel boring operations.

[0034] 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-water integrated ring-mounted spray device for a fully-mechanized excavator, characterized in that: It comprises two arc-shaped spray devices connected to form a ring and fixed to the end of the cutting arm of the tunnel boring machine, each arc-shaped spray device comprises an arc-shaped air-water casing and a plurality of air-water nozzles uniformly distributed on the pipe along the air-water casing; An arc-shaped connecting plate is also arranged inside the air-water casing, and a mounting hole for mounting and fixing on the end of the cutting arm of the tunnel boring machine is opened on the arc-shaped connecting plate.

2. The air-water integrated ring-mounted spray device for a fully-mechanized excavator according to claim 1, characterized in that: An arc-shaped baffle plate which half-wraps the air-water nozzle is also arranged above the air-water casing, and a through hole for spraying is opened at the top of the arc-shaped baffle plate at a corresponding position of the air-water nozzle.

3. The air-water integrated ring-mounted spray device for a fully-mechanized excavator according to claim 1, characterized in that: The ends of the arc-shaped spray devices are correspondingly provided with connecting pieces and connecting holes, which are used for connecting two arc-shaped spray devices into a ring.

4. The air-water integrated ring-mounted spray device for a fully-mechanized excavator according to claim 1, characterized in that: The air-water casing comprises a water inlet arc chamber and an air inlet arc chamber, which are respectively connected with a water inlet joint and an air inlet joint arranged on the air-water casing.

5. The air-water integrated ring-mounted spray device for a fully-mechanized excavator according to claim 4, characterized in that: The air-water nozzle is connected with the water pipe internal thread and the air pipe external thread of the air-water sleeve through the pipe internal thread and the pipe external thread of the air-water sleeve to form an air-water integrated spray device.

6. The air-water integrated ring-mounted spray device for a fully-mechanized excavator according to claim 5, characterized in that: The air-water nozzle is equipped with a liquid cavity, an air chamber, an air outlet, an atomizing cavity and a nozzle. Water passes through the liquid cavity and becomes small atomized particles through the water outlet. At the same time, high-pressure gas passes through the air chamber and is mixed with the atomized particles in the atomizing cavity under the action of the air outlet, and is ejected from the nozzle to form a conical water mist.

7. The air-water integrated ring-mounted spray device for a fully-mechanized excavator according to claim 6, characterized in that: The water outlet is arranged in a circle, and the air outlets include one arranged in a circle outside the water outlet and one arranged in a central position of the circle of the water outlet.

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