Mining foam dust settling system and coal mining device

Abstract

The invention discloses a mining foam dust fall system and a coal mining device, the foam dust fall system comprises: a storage box, a storage cavity for storing a foaming agent is defined in the storage box, the storage box is provided with a first compressed air inlet, a charging port and a discharging port, and the first compressed air inlet is suitable for being connected with a high-pressure air source; a mixing cavity is defined in the mixer, the mixer is provided with a water inlet, a feeding port, a second compressed air inlet and a mixing outlet, the water inlet is suitable for being connected with a water source, the feeding port is connected with the discharging port, and the second compressed air inlet is suitable for being connected with a high-pressure air source; the foaming device is connected between the mixed outlet and the spray head assembly. According to the foam dust suppression system, mixing and conveying of the foaming agent and the water are driven by the high-pressure air source, water pressure driving is not needed, so that the requirement for the water pressure is reduced, pressurization equipment such as a water pump does not need to be used for pressurization during construction, the construction cost is reduced, and the safety risk in the construction process is reduced.

Description

Technical Field

[0001] This invention relates to the field of foam dust suppression technology, and in particular to a foam dust suppression system for mining and a coal mining device having the foam dust suppression system. Background Technology

[0002] As is well known, coal mining machines generate a large amount of dust during the mining process, which poses a significant threat to workers' health, coal mine production safety, and even the surrounding ecological environment. To reduce the hazards caused by dust during coal mining, it is essential to implement effective dust suppression measures, among which foam dust suppression is a widely used method.

[0003] Existing mining foam dust suppression systems generally require high water pressure. In some cases, water pressure injection is needed to generate a negative pressure siphon effect, thereby drawing the foaming agent into the pipeline and mixing it with the high-pressure water flow to form a mixed foaming liquid. In other cases, water pressure is needed to transport water or the mixed foaming liquid from the body of the coal mining machine to the rocker arm.

[0004] However, due to the unstable water pressure in the underground water supply network, the water supply pressure is usually higher in lower-lying areas, which can generally meet the above requirements; however, the water supply pressure is usually lower in higher-lying areas, which cannot directly meet the above requirements. In this case, it is necessary to use booster equipment such as water pumps to increase the water pressure, which increases construction costs and also exacerbates safety risks during construction. Summary of the Invention

[0005] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this invention is to provide a foam dust suppression system for mining, in which the mixing and transportation of the foaming agent and water are driven by a high-pressure air source, eliminating the need for water pressure. This reduces the requirement for water pressure and eliminates the need for pressurization equipment such as water pumps during construction, thereby reducing both construction costs and safety risks during construction.

[0006] The present invention also provides a coal mining device.

[0007] According to a first aspect of the present invention, a mining foam dust suppression system includes: a storage tank adapted to be mounted on the body of a coal mining machine, the storage tank defining a storage cavity for storing a foaming agent, the storage tank having a first compressed air inlet, a feeding port, and a discharging port communicating with the storage cavity, the first compressed air inlet being adapted to be connected to a high-pressure air source; a mixer adapted to be mounted on the body, the mixer defining a mixing cavity, the mixer having a water inlet, a feeding port, a second compressed air inlet, and a mixing outlet communicating with the mixing cavity, the water inlet being adapted to be connected to a water source, the feeding port being connected to the discharging port, the second compressed air inlet being adapted to be connected to a high-pressure air source; a foaming device and a nozzle assembly, the foaming device and the nozzle assembly both being mounted on the rocker arm of the coal mining machine, and the foaming device being connected between the mixing outlet and the nozzle assembly.

[0008] In addition, the mining foam dust suppression system according to embodiments of the present invention may also have the following additional technical features: Optionally, the mixer includes: an outer shell defining a mixing chamber within the outer shell, the feed inlet and the second compressed air inlet both being disposed on the side peripheral wall of the outer shell and spaced apart from each other, and a mixing outlet being disposed at one axial end of the outer shell; and an inner cylinder extending axially along the outer shell, at least a portion of the inner cylinder being located within the mixing chamber, the inner cylinder defining an inner cavity, a water inlet being disposed at one axial end of the inner cylinder away from the mixing outlet and communicating with the inner cavity, the other axial end of the inner cylinder being located within the mixing chamber and having a water outlet communicating with the inner cavity, the water outlet being spaced apart from the mixing outlet, and the feed inlet and the second compressed air inlet both being directly opposite the inner cylinder along the radial direction of the inner cylinder.

[0009] Optionally, the side peripheral wall of the outer casing includes a first side peripheral wall segment and a second side peripheral wall segment connected to each other. The mixing outlet is located at one axial end of the outer casing away from the first side peripheral wall segment. The axial cross-sectional area of ​​the second side peripheral wall segment decreases in the direction from the inlet to the mixing outlet. The outlet is located inside the first side peripheral wall segment, and the ratio D of the distance D between the outlet and the end of the first side peripheral wall segment connected to the second side peripheral wall segment to the length L of the first side peripheral wall segment is in the range of 0.25 to 0.35.

[0010] Optionally, the second compressed air inlet is located on the side of the feed inlet away from the mixing outlet.

[0011] Optionally, the nozzle assembly includes: a nozzle holder defining a receiving cavity, the nozzle holder having an inlet and an outlet communicating with the receiving cavity, the outlet being connected to a nozzle, and the inlet being connected to the foaming device; and a mounting base adapted to be connected to the rocker arm, the nozzle holder being stacked on the mounting base, and an adjustment guide structure and a position locking structure being provided between the nozzle holder and the mounting base. The position locking structure has an unlocked state and a locked state. When the position locking structure is in the unlocked state, the nozzle holder can rotate relative to the mounting base about a rotation axis under the guidance of the adjustment guide structure to adjust the orientation of the outlet. When the position locking structure is in the locked state, the relative position between the nozzle holder and the mounting base is fixed.

[0012] Optionally, the adjustment guide structure includes a pivot connector extending along the rotation axis, a first pivot hole on the nozzle holder, and a second pivot hole on the mounting base. A portion of the pivot connector is fitted into the first pivot hole, and a portion of the pivot connector is fitted into the second pivot hole.

[0013] Optionally, the position locking structure includes a locking connector, a first locking positioning hole, and a plurality of second locking positioning holes spaced apart from each other. The first locking positioning hole is disposed on the nozzle holder, and the plurality of second locking positioning holes are disposed on the mounting base. The central axis of the first locking positioning hole and the central axis of each of the second locking positioning holes are parallel to and spaced apart from the rotation axis, and the distance between the central axis of the first locking positioning hole and the rotation axis and the distance between the central axis of each of the second locking positioning holes and the rotation axis are equal. In the locked state, a portion of the locking connector is fitted into the first locking positioning hole, and a portion of the locking connector may optionally be fitted into one of the plurality of second locking positioning holes.

[0014] Optionally, the nozzle holder includes a body portion, the receiving cavity includes a body cavity formed within the body portion, and the nozzle outlet includes a plurality of first nozzle outlets disposed on the body portion and communicating with the body cavity. The plurality of first nozzle outlets are arranged sequentially at intervals along the length direction of the body portion, and the plurality of first nozzle outlets all penetrate a first side wall surface of the body portion. The two ends of the length direction of the body portion are a first end and a second end, respectively. In the direction from the first end to the second end, the angle α between the central axis of the first nozzle outlet and the perpendicular line of the first side wall surface gradually increases.

[0015] Optionally, the nozzle holder further includes an extension connected to the second end of the body portion. The receiving cavity includes an extension cavity formed within the extension and communicating with the body cavity. The nozzle outlet includes a plurality of second nozzle outlets disposed on the extension and communicating with the extension cavity. The extension extends obliquely in a direction from the first end to the second end toward a plane away from the first sidewall. The plurality of second nozzle outlets are sequentially spaced along the length of the extension, and each of the plurality of second nozzle outlets penetrates the second sidewall of the extension opposite to the plane of the first sidewall. The central axis of each of the second nozzle outlets is perpendicular to the plane of the second sidewall. The angle β between the plane of the second sidewall and the plane of the first sidewall is greater than or equal to the maximum value of the plurality of angles α.

[0016] According to a second aspect of the present invention, a coal mining apparatus includes: a coal mining machine, the coal mining machine including a body, a rocker arm and a cutting drum, one end of the rocker arm being connected to the body and the other end of the rocker arm being connected to the cutting drum; and a mining foam dust suppression system according to the first aspect of the present invention, wherein the storage tank and the mixer are disposed on the body, and the foaming device and the nozzle assembly are disposed on the rocker arm.

[0017] Compared with the prior art, the mining foam dust suppression system of the first aspect of the present invention has at least the following advantages: According to the embodiment of the present invention, the mixing and transportation of foaming agent and water in the mining foam dust suppression system are driven by a high-pressure air source (compressed air), without the need for water pressure. Therefore, the water pressure requirement is reduced, and there is no need to use water pumps or other pressurizing equipment to pressurize during construction. This not only reduces construction costs but also reduces safety risks during construction.

[0018] According to a second aspect embodiment of the present invention, the coal mining apparatus, by providing the mining foam dust suppression system of the first aspect embodiment of the present invention, thereby enabling the coal mining apparatus to possess all the advantages of the mining foam dust suppression system of the first aspect embodiment, which will not be repeated here.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a coal mining device according to an embodiment of the present invention; Figure 2 yes Figure 1 The diagram shown is a structural schematic of a mining foam dust suppression system. Figure 3 yes Figure 2 A partial structural schematic diagram of a mining foam dust suppression system is shown. Figure 4 yes Figure 3 The diagram shows the structure of the mixer. Figure 5 yes Figure 4 The mixer shown is a cross-sectional view along line AA; Figure 6 yes Figure 1 A partial structural schematic diagram of the coal mining device shown; Figure 7 yes Figure 6 The diagram shows the structure of the nozzle assembly, in which the nozzle holder is located in a first position relative to the mounting base; Figure 8 yes Figure 7 A schematic diagram of the nozzle assembly from another angle; Figure 9 yes Figure 8 An exploded view of the nozzle assembly shown; Figure 10 yes Figure 9 A partial structural schematic diagram of the nozzle assembly shown; Figure 11 yes Figure 10 Exploded view of the structure shown; Figure 12 yes Figure 11 The front view of the nozzle holder shown; Figure 13 yes Figure 12 The nozzle holder shown is a cross-sectional view along line BB; Figure 14 yes Figure 12 An exploded view of the nozzle mount shown; Figure 15 This is a schematic diagram of the nozzle assembly structure according to an embodiment of the present invention, wherein the nozzle holder is located at a second position relative to the mounting base; Figure 16 yes Figure 15 The exploded view of the nozzle assembly shown.

[0021] Figure label: Foam dust suppression system 1000; Nozzle assembly 100; Rotation axis 101; Nozzle holder 10; Body part 11; Body cavity 111; First nozzle outlet 1111; First side wall 112; First end 113; Second end 114; Extension 12; Extension cavity 121; Second nozzle 1211; Second side wall 122; Receiving cavity 10a; Inlet 10a1; Spray outlet 10a2; Mounting base 20; nozzle 30; connector 40; Pivot connector 51; First pivot hole 52; Second pivot hole 53; Locking connector 61; first locking positioning hole 62; second locking positioning hole 63; Protective cover plate 70; pivot clearance hole 71; locking clearance hole 72; Fastening connector 81; First fastening fixing hole 82; Second fastening fixing hole 83; Storage bin 200; First compressed air inlet 201; Feeding port 202; Discharge port 203; Mixer 300; Mixing chamber 301; Water inlet 3011; Feed inlet 3012; Second compressed air inlet 3013; Mixing outlet 3014; Outer shell 302; First side peripheral wall section 3021; ​​Second side peripheral wall section 3022; Inner cylinder 303; Inner cavity 3031; Water outlet 30311; Foaming device 400; material supply control valve 500; water supply control valve 600; first compressed air control valve 700; second compressed air control valve 800; three-way connector 900; first interface 901; second interface 902; third interface 903; Coal mining machine 2000; machine body 2001; rocker arm 2002; cutting drum 2003. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Please see Figures 1-3 According to an embodiment of the present invention, a coal mining apparatus includes a coal mining machine 2000 and a mining foam dust suppression system 1000. The coal mining machine 2000 includes a body 2001, a rocker arm 2002, and a cutting drum 2003. One end of the rocker arm 2002 is connected to the body 2001, and the other end of the rocker arm 2002 is connected to the cutting drum 2003. When the coal mining machine is working, the cutting drum 2003 cuts the coal body, thereby generating a large amount of coal dust. The foam dust suppression system 1000 is used to automatically spray foam dust suppressant towards the coal dust area, thereby achieving the purpose of dust suppression.

[0024] The foam dust suppression system 1000 includes a storage tank 200, a mixer 300, a foaming device 400, and a nozzle assembly 100. The storage tank 200 and the mixer 300 are both mounted on the body 2001, and the foaming device 400 and the nozzle assembly 100 are both mounted on the rocker arm 2002.

[0025] The storage tank 200 defines a storage cavity for storing the foaming agent. The storage tank 200 is equipped with a first compressed air inlet 201, a feeding port 202, and a discharging port 203, all communicating with the storage cavity. The first compressed air inlet 201 is adapted to connect to a high-pressure air source. It should be noted that, in this application, the "high-pressure air source" can be provided through an underground compressed air pipeline network; that is, in this case, the first compressed air inlet 201 is connected to the underground compressed air pipeline network. Furthermore, the "high-pressure air source" mentioned in this application refers to gas with a pressure not lower than 0.2 MPa.

[0026] Optionally, please refer to Figure 3 The feeding port 202 and the first compressed air inlet 201 are spaced apart on the top wall of the storage tank 200, and the discharge port 203 is located on the side wall of the storage tank 200 near the bottom wall. Of course, this application is not limited to this, and the discharge port 203 may also be located on the bottom wall of the storage tank 200.

[0027] The feeding port 202 is used to add foaming agent for dust suppression into the storage chamber, and the first compressed air inlet 201 is used to introduce compressed air into the storage chamber. The foaming agent in the storage chamber can be discharged from the storage box 200 through the discharge port 203 under the drive of compressed air.

[0028] The mixer 300 defines a mixing chamber 301. The mixer 300 is provided with a water inlet 3011, a feed inlet 3012, a second compressed air inlet 3013, and a mixing outlet 3014, all communicating with the mixing chamber 301. The water inlet 3011 is adapted to connect to a water source, i.e., the water inlet 3011 is used to introduce water into the mixing chamber 301. In this application, the "water source" can be provided through an underground water supply network.

[0029] The feed inlet 3012 is connected to the discharge outlet 203, allowing the foaming agent discharged from the discharge outlet 203 of the storage tank 200 to enter the mixing chamber 301 through the feed inlet 3012. The second compressed air inlet 3013 is suitable for connecting to a high-pressure air source. Similarly, the second compressed air inlet 3013 can be connected to the underground compressed air pipeline network to achieve the connection between the second compressed air inlet 3013 and the high-pressure air source. In other words, the second compressed air inlet 3013 is used to introduce compressed air into the mixing chamber 301.

[0030] Both the foaming device 400 and the nozzle assembly 100 are mounted on the rocker arm 2002 of the coal mining machine 2000, with the foaming device 400 connected between the mixing outlet 3014 and the nozzle assembly 100. Specifically, water entering the mixing chamber 301 through the water inlet 3011 and foaming agent entering the mixing chamber 301 through the feed inlet 3012 mix to form a mixed foaming liquid. Driven by compressed air introduced into the mixing chamber 301 through the second compressed air inlet 3013, the mixed foaming liquid is discharged from the mixer 300 through the mixing outlet 3014 and transported to the foaming device 400 located on the rocker arm 2002. After foaming in the foaming device 400, the mixed foaming liquid is sprayed onto the desired dust suppression area through the nozzle assembly 100.

[0031] Obviously, in the foam dust suppression system 1000 of this application embodiment, when in operation, the foaming agent is transported from the storage tank 200 to the mixer 300 under the drive of compressed air introduced through the first compressed air inlet 201, and mixed with water in the mixer 300 to form a mixed foaming liquid. That is, the mixing process of foaming agent and water is completed under the drive of compressed air, and there is no requirement for water pressure. The mixing of foaming agent and water can be achieved regardless of whether the underground terrain is low and the water pressure is high or high.

[0032] Furthermore, the mixed foaming liquid formed in the mixer 300 is transported by compressed air introduced through the second compressed air inlet 3013 from the mixer 300 located at the body 2001 of the coal mining machine 2000 to the foaming device 400 located at the rocker arm 2002 of the coal mining machine 2000 for foaming. That is, the transportation process of the mixed foaming liquid is also completed under the drive of compressed air. Similarly, this process still does not require high water pressure; the transportation of the mixed foaming liquid can be achieved regardless of whether the underground terrain is low and the water pressure is high or low.

[0033] Understandably, the water supply pressure in underground water supply networks is unstable. In lower-lying areas, the water supply pressure is typically higher, while in higher-lying areas, the pressure is typically lower. However, the air supply pressure in underground compressed air networks is relatively stable and unaffected by the elevation of the working location. Therefore, in the foam dust suppression system 1000 of this application, the mixing of the foaming agent and water, as well as the delivery of the mixed foaming liquid, are all carried out under compressed air drive, unaffected by water pressure fluctuations. During dust suppression operations, there is no need to use pumps or other pressurizing equipment to increase the water pressure.

[0034] According to the embodiment of the present invention, the mixing and transportation of foaming agent and water in the mining foam dust suppression system 1000 are driven by a high-pressure air source (compressed air), without the need for water pressure. Therefore, the water pressure requirement is reduced, and there is no need to use water pumps or other pressurizing equipment to pressurize during construction. This not only reduces construction costs but also reduces safety risks during construction.

[0035] Please see Figures 2-6 The foaming device 400 is mounted on the rocker arm 2002 of the coal mining machine 2000 and located near the nozzle assembly 100. There is no need for a conveying pipe to connect the foaming device 400 and the nozzle assembly 100. This allows the foam formed within the foaming device 400 to be transported to the nozzle assembly 100 over a shorter distance and sprayed onto the desired dust suppression area, resulting in a larger volume of foam sprayed by the nozzle assembly 100 and better dust suppression. The foaming device 400 and the nozzle assembly 100 can be connected by a plug-in connection. Optionally, the foaming device 400 and the nozzle assembly 100 can be connected by a connecting joint 40.

[0036] Please see Figures 3-5 The mixer 300 includes an outer shell 302 and an inner cylinder 303. The outer shell 302 defines a mixing chamber 301. The feed inlet 3012 and the second compressed air inlet 3013 are both located on the side wall of the outer shell 302 and are spaced apart from each other. The mixing outlet 3014 is located at one axial end of the outer shell 302. The inner cylinder 303 extends axially along the outer shell 302. At least a portion of the inner cylinder 303 is located within the mixing chamber 301, which defines an inner cavity 3031. An inlet 3011 is located at one axial end of the inner cylinder 303 away from the mixing outlet 3014 and communicates with the inner cavity 3031. The other axial end of the inner cylinder 303 is located within the mixing chamber 301 and has an outlet 30311 communicating with the inner cavity 3031. The outlet 30311 is spaced apart from the mixing outlet 3014. The feed inlet 3012 and the second compressed air inlet 3013 are both directly opposite the inner cylinder 303 along its radial direction. That is, axially, both the second compressed air inlet 3013 and the feed inlet 3012 are located on the side of the outlet 30311 away from the mixing outlet 3014 in the mixing chamber 301.

[0037] In this way, compressed air and foaming agent are radially conveyed into the mixing chamber 301, while water is axially conveyed into the mixing chamber 301 through the inner cylinder 303. Furthermore, in the axial direction of the mixing chamber 301, the second compressed air inlet 3013 and the feed inlet 3012 are both located on the side of the water outlet 30311 away from the mixing outlet 3014, thus preventing the mixing chamber 301 from being filled with water, which would prevent the compressed air and foaming agent from entering the mixing chamber 301. Water and foaming agent mix in the mixing chamber 301 near the mixing outlet 3014 to form a mixed foaming liquid, which is then conveyed through the mixing outlet 3014 to the foaming device 400 located at the rocker arm 2002 under the drive of compressed air.

[0038] For further information, please refer to [link / reference]. Figures 3-5 In the axial direction of the mixing chamber 301, the second compressed air inlet 3013 is located on the side of the feed inlet 3012 away from the mixing outlet 3014. In this way, after the foaming agent enters the mixing chamber 301 through the feed inlet 3012, it flows axially towards the mixing outlet 3014 under the action of compressed air and mixes with water to form a foaming mixture, so as to meet the water-material ratio requirements.

[0039] Please continue reading. Figures 3-5 The outer casing 302 has sidewalls comprising a first sidewall segment 3021 and a second sidewall segment 3022 connected to each other. A mixing outlet 3014 is located at the axial end of the outer casing 302 away from the first sidewall segment 3021. The axial cross-sectional area of ​​the second sidewall segment 3022 decreases in the direction from the inlet 3011 to the mixing outlet 3014. In this way, the second sidewall segment 3022 not only serves as a guide, directing the water and material towards the mixing outlet 3014, but also ensures a more uniform and thorough mixing of water and foaming agent.

[0040] For further information, please refer to [link / reference]. Figures 3-5 The outlet 30311 is located within the first side peripheral wall section 3021, and the ratio D / L of the distance D between the outlet 30311 and the end of the first side peripheral wall section 3021 connected to the second side peripheral wall section 3022 to the length L of the first side peripheral wall section 3021 ranges from 0.25 to 0.35. That is, the ratio D / L of the distance D between the outlet 30311 and the end of the first side peripheral wall section 3021 connected to the second side peripheral wall section 3022 to the length L of the first side peripheral wall section 3021 is greater than or equal to 0.25 and less than or equal to 0.35. For example, the ratio D / L can be 0.25, 0.26, 0.27, 0.28, 0.29, 0.30, 0.31, 0.32, 0.33, 0.34, or 0.35, etc. In this way, water, foaming agent, and compressed air can all enter the mixing chamber 301 smoothly, while ensuring that water and foaming agent can be mixed evenly and thoroughly.

[0041] Please see Figure 3 A feed control valve 500 can be provided between the discharge port 203 and the feed port 3012 to control the amount of foaming agent supplied into the mixer 300. Optionally, the feed control valve 500 can be a manual ball valve, which is low in cost and easy to operate. In addition, a flow meter can also be provided between the feed control valve 500 and the feed port 3012 to detect the flow rate of the foaming agent supplied into the mixer 300.

[0042] Please continue reading. Figure 3 A water supply control valve 600 can be installed between the water source (underground water supply network) and the inlet 3011 to control the amount of water supplied to the mixing chamber 301. Optionally, the water supply control valve 600 can also be a manual ball valve, which is low in cost and easy to operate. In addition, a flow meter can also be installed between the water supply control valve 600 and the inlet 3011 to detect the flow rate of water supplied to the mixer 300.

[0043] Please continue reading. Figure 3 A first compressed air control valve 700 can be installed between the high-pressure air source (underground compressed air pipeline) and the first compressed air inlet 201 to control the flow rate of compressed air delivered into the storage tank 200. Optionally, the first compressed air control valve 700 can be a manual ball valve, which is low in cost and easy to operate. Similarly, a second compressed air control valve 800 can be installed between the high-pressure air source (underground compressed air pipeline) and the second compressed air inlet 3013 to control the flow rate of compressed air delivered into the mixer 300. Optionally, the second compressed air control valve 800 can be a manual ball valve, which is low in cost and easy to operate.

[0044] Please continue reading. Figure 3 The foam dust suppression system 1000 may also include a three-way connector 900, which includes a first interface 901, a second interface 902, and a third interface 903 that are interconnected. The first interface 901 is connected to the first compressed air inlet 201, the second interface 902 is connected to the second compressed air inlet 3013, and the third interface 903 is connected to the high-pressure air source (underground compressed air pipeline). In this way, the three-way connector 900 can simultaneously connect the high-pressure air source to the first compressed air inlet 201 and the second compressed air inlet 3013, resulting in a simple connection structure and convenient connection.

[0045] Based on this, the first compressed air control valve 700 can be located between the first interface 901 and the first compressed air inlet 201, and the second compressed air control valve 800 can be located between the second interface 902 and the second compressed air inlet 3013.

[0046] Please see Figures 6-13The nozzle assembly 100 includes a nozzle holder 10, a nozzle 30, and a mounting base 20. The nozzle holder 10 defines a receiving cavity 10a. The nozzle holder 10 has an inlet 10a1 and an outlet 10a2 communicating with the receiving cavity 10a. The outlet 10a2 is adapted to connect to the nozzle 30, and the inlet 10a1 is connected to a foaming device 400. Foam formed in the foaming device 400 enters the receiving cavity 10a through the inlet 10a1, and is then sprayed onto the desired dust suppression area through the nozzle 30 connected to the outlet 10a2.

[0047] Mounting base 20 is adapted to be connected to rocker arm 2002 of coal mining machine 2000. Nozzle holder 10 is stacked on mounting base 20, and a positioning guide structure and a position locking structure are provided between nozzle holder 10 and mounting base 20. The position locking structure has an unlocked state and a locked state. When the position locking structure is in the unlocked state, nozzle holder 10 can rotate relative to mounting base 20 about rotation axis 101 under the guidance of positioning guide structure to adjust the orientation of nozzle outlet 10a2; when the position locking structure is in the locked state, the relative position between nozzle holder 10 and mounting base 20 is fixed.

[0048] In other words, the mounting base 20 is connected to the rocker arm 2002, and the nozzle holder 10 is connected to the mounting base 20, thus allowing the nozzle holder 10 to be mounted and fixed on the rocker arm 2002. When it is necessary to adjust the spray angle of the nozzle 30, the position locking structure can be unlocked, allowing the nozzle holder 10 to rotate relative to the mounting base 20 under the guidance of the adjustment guide structure, thereby adjusting the orientation of the spray outlet 10a2 and the nozzle 30. After the position of the nozzle holder 10 is adjusted, the position locking structure is locked again, thereby fixing the position of the nozzle holder 10 relative to the mounting base 20.

[0049] It should be noted that, in this application, the position locking structure being in an unlocked state refers to the state in which the position locking structure is in when the relative position of the nozzle holder 10 and the mounting base 20 is not fixed; conversely, the position locking structure being in a locked state refers to the state in which the position locking structure is in when the relative position of the nozzle holder 10 and the mounting base 20 is fixed.

[0050] According to an embodiment of the present invention, the nozzle assembly 100 allows for flexible adjustment of the orientation of the nozzle frame 10 fixed to the rocker arm 2002 of the coal mining machine 2000 via the mounting base 20. Furthermore, by providing an adjustment guide structure and a position locking structure between the nozzle frame 10 and the mounting base 20, the orientation of the nozzle 30 can be adjusted to precisely align with the desired dust suppression area. For example, the nozzle 30 can be oriented towards the cutting drum 2003. The nozzle assembly 100 of this embodiment offers good versatility of the nozzle frame 10 and high spraying accuracy of the nozzle 30.

[0051] Optionally, please refer to Figures 9-11 The rotation axis 101 is perpendicular to the central axis of the nozzle 10a2. This allows for a wider range of orientation adjustment of the nozzle 10a2 when the nozzle holder 10 rotates relative to the mounting base 20.

[0052] In one embodiment of the present invention, the positioning guide structure includes a pivot shaft and a pivot hole extending along the rotation axis 101. One of the pivot shaft and the pivot hole is disposed on the nozzle holder 10, and the other is disposed on the mounting base 20. The pivot shaft fits into the pivot hole. That is, in some embodiments, the pivot hole is disposed on the mounting base 20, and the pivot shaft is disposed on the nozzle holder 10. Optionally, the pivot shaft and the nozzle holder 10 are integrally formed. In other embodiments, the pivot hole is disposed on the nozzle holder 10, and the pivot shaft is disposed on the mounting base 20. Optionally, the pivot shaft and the mounting base 20 are integrally formed. By rotating the pivot shaft within the pivot hole, the nozzle holder 10 is rotated relative to the mounting base 20 about the rotation axis 101. The positioning guide structure is simple in structure and easy to manufacture.

[0053] In another embodiment of the invention, please refer to Figures 7-9 The adjustment guide structure includes a pivot connector 51 extending along the rotation axis 101, a first pivot hole 52 on the nozzle holder 10, and a second pivot hole 53 on the mounting base 20. A portion of the pivot connector 51 fits into the first pivot hole 52, and a portion of the pivot connector 51 fits into the second pivot hole 53. Optionally, the pivot connector 51 can be a bolt, and the first pivot hole 52 and the second pivot hole 53 can be threaded holes.

[0054] In one embodiment of the present invention, please refer to Figures 7-9 The position locking structure includes a locking connector 61, a first locking positioning hole 62, and a plurality of second locking positioning holes 63 spaced apart from each other. The first locking positioning hole 62 is provided on the nozzle holder 10, and the plurality of second locking positioning holes 63 are provided on the mounting base 20. The central axis of the first locking positioning hole 62 and the central axis of each second locking positioning hole 63 are parallel to and spaced apart from the rotation axis 101, and the distance between the central axis of the first locking positioning hole 62 and the rotation axis 101 and the distance between the central axis of each second locking positioning hole 63 and the rotation axis 101 are equal. When the position locking structure is in the locked state, a part of the locking connector 61 fits into the first locking positioning hole 62, and a part of the locking connector 61 can be selectively fitted into one of the plurality of second locking positioning holes 63.

[0055] By providing a plurality of second locking positioning holes 63 on the mounting base 20, and allowing a portion of the locking connector 61 to selectively engage within one of the plurality of second locking positioning holes 63, positioning of the nozzle holder 10 relative to the mounting base 20 at multiple angles can be achieved. For example, in Figures 8-9 and Figures 15-16 In this process, the locking connector 61 engages within different second locking positioning holes 63, thereby achieving a first position (e.g., the nozzle holder 10 relative to the mounting base 20) of the first position. Figures 8-9 (as shown) and second position (as shown) Figures 15-16 The location shown in the image.

[0056] Understandably, when the locking connector 61 is separated from at least one of the first locking positioning hole 62 and the second locking positioning hole 63, the position locking structure is in the unlocked state. At this time, the nozzle holder 10 can rotate relative to the mounting base 20 about the rotation axis 101, thereby adjusting the spray angle of the nozzle 30. When the locking connector 61 is engaged with both the first locking positioning hole 62 and the second locking positioning hole 63, the position locking structure is in the locked state, and the relative positions of the nozzle holder 10 and the mounting base 20 are fixed.

[0057] Optionally, the locking connector 61 is a bolt, and the first locking positioning hole 62 and the second locking positioning hole 63 are both threaded holes.

[0058] Alternatively, please continue reading Figures 8-9 as well as Figures 15-16 The position locking structure includes two components, which are symmetrical about the rotation axis 101. This makes the nozzle holder 10 more securely positioned on the mounting base 20.

[0059] Please see Figures 10-14 The nozzle holder 10 includes a body portion 11, a receiving cavity 10a including a body cavity 111 formed within the body portion 11, and a nozzle outlet 10a2 including a plurality of first nozzle outlets 1111 disposed on the body portion 11 and communicating with the body cavity 111. The plurality of first nozzle outlets 1111 are arranged sequentially at intervals along the length direction of the body portion 11, and the plurality of first nozzle outlets 1111 all penetrate the first side wall surface 112 of the body portion 11. The two ends of the length direction of the body portion 11 are a first end 113 and a second end 114, respectively. In the direction from the first end 113 to the second end 114, the angle α between the central axis of the first nozzle outlet 1111 and the perpendicular line of the first side wall surface 112 gradually increases.

[0060] Please see Figure 6When the nozzle assembly 100 is mounted on the rocker arm 2002, the first end 113 is located on the side of the second end 114 away from the cutting drum 2003. In this way, by gradually increasing the angle α between the central axis of the first spray outlet 1111 and the perpendicular line of the first side wall 112 in the direction from the first end 113 to the second end 114, not only can the dust suppression spray range be increased, but also, by adjusting the position of the nozzle frame 10, the first spray outlet 1111 can be directed towards the location of the cutting drum 2003 of the coal mining machine 2000, thereby making the dust suppression spray accuracy of the nozzle assembly 100 higher.

[0061] For further information, please refer to [link / reference]. Figures 10-14 The nozzle holder 10 also includes an extension 12 connected to the second end 114 of the main body 11. The receiving cavity 10a includes an extension cavity 121 formed within the extension 12 and communicating with the main body cavity 111. The nozzle outlet 10a2 includes a plurality of second nozzle outlets 1211 disposed on the extension 12 and communicating with the extension cavity 121. The extension 12 extends obliquely in a direction from the first end 113 to the second end 114 toward the plane away from the first side wall 112. The plurality of second nozzle outlets 1211 are arranged sequentially at intervals along the length of the extension 12, and each of the plurality of second nozzle outlets 1211 penetrates the second side wall 122 of the extension 12 opposite to the plane of the first side wall 112. The central axis of each of the second nozzle outlets 1211 is perpendicular to the plane of the second side wall 122. The included angle β between the plane of the second side wall 122 and the plane of the first side wall 112 is greater than or equal to the maximum value of a plurality of included angles α.

[0062] By setting an inclined extension 12 and providing multiple second spray outlets 1211 on the extension 12, and making the central axis of each of the second spray outlets 1211 perpendicular to the plane where the second side wall 122 is located, and the included angle β between the plane where the second side wall 122 is located and the plane where the first side wall 112 is located is greater than or equal to the maximum value among the multiple included angles α, the spraying range and spraying accuracy of the nozzle assembly 100 can be further increased.

[0063] Optionally, the body portion 11 and the extension portion 12 can be integrally molded. That is, the body portion 11 and the extension portion 12 can be integrally machined, which can improve the connection strength between the body portion 11 and the extension portion 12 and simplify the manufacturing process of the nozzle holder 10. Of course, this application is not limited to this, the body portion 11 and the extension portion 12 can also be separately molded. That is, the body portion 11 and the extension portion 12 can be separately machined and then connected together by welding or other connection methods. This can simplify the production mold of the nozzle holder 10.

[0064] Please see Figures 7-9 as well as Figures 15-16 The nozzle assembly 100 also includes a protective cover plate 70, which is placed on the side of the nozzle holder 10 away from the mounting base 20 to cover the nozzle 30. By providing the protective cover plate 70, the nozzle 30 can be protected from being damaged by coal blocks or gangue during operation.

[0065] Please see Figures 8-9 The nozzle assembly 100 also includes a connecting joint 40, which is connected to the inlet 10a1 of the nozzle holder 10. The foaming device can be connected to the inlet 10a1 via the connecting joint 40, making it easier to connect the nozzle holder 10 and the foaming device. Therefore, the protective cover 70 also serves to cover the connecting joint 40, thus preventing it from being damaged.

[0066] Optionally, please refer to Figures 8-9 as well as Figures 15-16 The protective cover 70 and the nozzle holder 10 can be connected by a fastening connector 81. Specifically, the protective cover 70 has a first fastening positioning hole 82, and the nozzle holder 10 has a second fastening positioning hole 83. A portion of the fastening connector 81 fits into the first fastening positioning hole 82, and another portion fits into the second fastening positioning hole 83. Optionally, the fastening connector 81 can be a bolt, and both the first fastening positioning hole 82 and the second fastening positioning hole 83 are threaded holes. The fastening connector 81 can include a plurality of bolts spaced apart from each other along the length of the nozzle holder 10, for example, in... Figures 8-9 as well as Figures 15-16 In the example shown, the fastening connector 81 may include five spaced apart from each other along the length of the nozzle holder 10.

[0067] Alternatively, please continue reading Figures 8-9 as well as Figures 15-16 The protective cover 70 is provided with a pivot clearance hole 71 for avoiding the pivot connector 51. In this way, when disassembling or assembling the pivot connector 51, it is not necessary to first remove the protective cover 70 from the nozzle holder 10.

[0068] Alternatively, please continue reading Figures 8-9 as well as Figures 15-16 The protective cover 70 is provided with a locking clearance hole 72 for avoiding the locking connector 61. In this way, when installing or removing the locking connector 61, it is not necessary to first remove the protective cover 70 from the nozzle holder 10.

[0069] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0072] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A foam dust suppression system for mining, characterized in that, include: A storage box, which is suitable for being installed on the body of a coal mining machine, has a storage cavity defined inside the storage box for storing foaming agent, and is provided with a first compressed air inlet, a feeding port and a discharging port communicating with the storage cavity. The first compressed air inlet is suitable for connecting to a high-pressure air source. A mixer, which is adapted to be disposed on the machine body, defines a mixing chamber inside the mixer, and is provided with a water inlet, a feed inlet, a second compressed air inlet and a mixing outlet communicating with the mixing chamber. The water inlet is adapted to be connected to a water source, the feed inlet is connected to the feed outlet, and the second compressed air inlet is adapted to be connected to a high-pressure air source. A foaming device and a nozzle assembly, both adapted to be mounted on the rocker arm of the coal mining machine, wherein the foaming device is connected between the mixing outlet and the nozzle assembly.

2. The mining foam dust suppression system according to claim 1, characterized in that, The mixer includes: The outer shell defines the mixing chamber. The feed inlet and the second compressed air inlet are both located on the side peripheral wall of the outer shell and are spaced apart from each other. The mixing outlet is located at one axial end of the outer shell. An inner cylinder extends axially along the outer shell, at least a portion of which is located within the mixing chamber. An inner cavity is defined within the inner cylinder. A water inlet is located at one axial end of the inner cylinder away from the mixing outlet and communicates with the inner cavity. The other axial end of the inner cylinder is located within the mixing chamber and has a water outlet communicating with the inner cavity. The water outlet is spaced apart from the mixing outlet. The feed inlet and the second compressed air inlet are both directly opposite the inner cylinder along its radial direction.

3. The mining foam dust suppression system according to claim 2, characterized in that, The outer casing's sidewalls include a first sidewall segment and a second sidewall segment connected to each other. The mixing outlet is located at one axial end of the outer casing away from the first sidewall segment. The axial cross-sectional area of ​​the second sidewall segment decreases in the direction from the inlet to the mixing outlet. The outlet is located within the first side peripheral wall section, and the ratio D of the distance D between the outlet and the end of the first side peripheral wall section connected to the second side peripheral wall section to the length L of the first side peripheral wall section is in the range of 0.25~0.

35.

4. The mining foam dust suppression system according to claim 2, characterized in that, The second compressed air inlet is located on the side of the feed inlet away from the mixing outlet.

5. The mining foam dust suppression system according to claim 1, characterized in that, The nozzle assembly includes: A nozzle holder defines a receiving cavity, and the nozzle holder is provided with an inlet and an outlet communicating with the receiving cavity. The outlet is connected to the nozzle, and the inlet is connected to the foaming device. A mounting base is provided, adapted to be connected to the rocker arm. The nozzle holder is stacked on the mounting base, and an adjustment guide structure and a position locking structure are provided between the nozzle holder and the mounting base. The position locking structure has an unlocked state and a locked state. When the position locking structure is in the unlocked state, the nozzle holder can rotate relative to the mounting base about the rotation axis under the guidance of the adjustment guide structure to adjust the orientation of the nozzle outlet; When the position locking structure is in the locked state, the relative position between the nozzle holder and the mounting base is fixed.

6. The mining foam dust suppression system according to claim 5, characterized in that, The adjustment guide structure includes a pivot connector extending along the rotation axis, a first pivot hole on the nozzle frame, and a second pivot hole on the mounting base. A portion of the pivot connector fits into the first pivot hole, and a portion of the pivot connector fits into the second pivot hole.

7. The mining foam dust suppression system according to claim 5, characterized in that, The position locking structure includes a locking connector, a first locking positioning hole, and a plurality of spaced-apart second locking positioning holes. The first locking positioning hole is located on the nozzle holder, and the plurality of second locking positioning holes are located on the mounting base. The central axis of the first locking positioning hole and the central axis of each of the second locking positioning holes are parallel to and spaced apart from the rotation axis, and the distance between the central axis of the first locking positioning hole and the rotation axis and the distance between the central axis of each of the second locking positioning holes and the rotation axis are all equal. When the position locking structure is in the locked state, a portion of the locking connector engages within the first locking positioning hole, and a portion of the locking connector may optionally engage within one of a plurality of second locking positioning holes.

8. The mining foam dust suppression system according to claim 5, characterized in that, The nozzle holder includes a body portion, the receiving cavity includes a body cavity formed within the body portion, and the nozzle outlet includes a plurality of first nozzle outlets disposed on the body portion and communicating with the body cavity. The plurality of first nozzle outlets are arranged at intervals along the length direction of the body portion, and each of the plurality of first nozzle outlets penetrates a first side wall surface of the body portion. The two ends of the body part along its length are a first end and a second end, and in the direction from the first end to the second end, the angle α between the central axis of the first nozzle and the perpendicular line of the first side wall gradually increases.

9. The mining foam dust suppression system according to claim 8, characterized in that, The nozzle holder further includes an extension connected to the second end of the body portion. The receiving cavity includes an extension cavity formed within the extension and communicating with the body cavity. The nozzle outlet includes a plurality of second nozzle outlets disposed on the extension and communicating with the extension cavity. The extension extends obliquely in a direction from the first end to the second end toward the plane away from the first sidewall. A plurality of second nozzles are arranged at intervals along the length of the extension, and each of the plurality of second nozzles penetrates the second sidewall of the extension opposite to the plane of the first sidewall. The central axis of each of the second nozzles is perpendicular to the plane of the second sidewall. The included angle β between the plane of the second sidewall and the plane of the first sidewall is greater than or equal to the maximum value of the plurality of included angles α.

10. A coal mining device, characterized in that, include: A coal mining machine, comprising a body, a rocker arm, and a cutting drum, wherein one end of the rocker arm is connected to the body and the other end of the rocker arm is connected to the cutting drum; According to any one of claims 1 to 9, the mining foam dust suppression system is provided on the machine body, and the foaming device and the nozzle assembly are provided on the rocker arm.

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