Spray head assembly and coal mining device

Abstract

The utility model discloses a kind of nozzle assembly and coal mining device, the nozzle assembly includes: nozzle;First connecting piece, the first connecting piece is equipped with the first connecting part and the second connecting part connected with each other, the first connecting part is rotatably connected around first axis with the nozzle, the second connecting part is suitable for rotatably connected around second axis with the base body for installing the nozzle assembly, the first axis and the second axis are perpendicular to each other.The nozzle assembly according to the utility model embodiment, the azimuth of nozzle nozzle is adjusted flexibly, conveniently, and nozzle assembly structure is simple.

Description

Technical Field

[0001] This utility model relates to the field of nozzle technology, and in particular to a nozzle assembly and a coal mining device having the nozzle assembly. Background Technology

[0002] Sprinklers are used in various technical fields such as dust control, cooling, and fire suppression. By aligning the nozzle of the sprinkler with the relevant area, dust control, cooling, or fire suppression materials are atomized and sprayed onto the area to achieve the desired purpose. However, existing sprinkler technologies suffer from problems such as inconvenient nozzle orientation adjustment and complex sprinkler structure. Utility Model Content

[0003] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model discloses a nozzle assembly, the nozzle assembly comprising: a nozzle; a first connector, the first connector having a first connecting portion and a second connecting portion connected to each other, the first connecting portion being rotatably connected to the nozzle about a first axis, and the second connecting portion being adapted to be rotatably connected to a base for mounting the nozzle assembly about a second axis, the first axis and the second axis being perpendicular to each other.

[0004] Furthermore, the first connecting part includes a first stop block and a first connecting post. The first connecting post extends along the extension direction of the first axis. One end of the first connecting post is connected to the first stop block. A fixing member is connected to the first connecting post. The nozzle is rotatably sleeved on the first connecting post and sandwiched between the first stop block and the fixing member.

[0005] Furthermore, the first connecting post is threadedly connected to the fixing member.

[0006] Furthermore, a first anti-vibration and anti-loosening component is provided between the fixing component and the nozzle; and / or a first self-locking and anti-loosening component is provided between the first stop block and the nozzle.

[0007] Furthermore, the nozzle includes a base and a connecting lug. The base defines a liquid-containing cavity, and the base is provided with an inlet and an outlet communicating with the liquid-containing cavity. The connecting lug is connected to the side of the base opposite to the outlet. The connecting lug is rotatably fitted onto the first connecting post and sandwiched between the first stop block and the fixing member.

[0008] Furthermore, the substrate is provided with a connection hole, and the nozzle assembly further includes a second connector. The second connector includes a second stop block and a second connecting post. The second connecting post extends along the extension direction of the second axis. One end of the second connecting post is connected to the second stop block, and the other end of the second connecting post is connected to the connection hole. The second connecting part is rotatably sleeved on the second connecting post and sandwiched between the second stop block and the substrate.

[0009] Furthermore, the second connecting post is threaded into the connecting hole.

[0010] Furthermore, a second anti-vibration and anti-loosening component is provided between the second stop block and the second connecting part; and / or a second self-locking and anti-loosening component is provided between the second connecting part and the base.

[0011] This utility model also discloses a coal mining device, which includes: a hydraulic support; and a nozzle assembly according to any of the above embodiments of this utility model, wherein the second connecting part is rotatably connected to the hydraulic support about the second axis, so that the nozzle of the nozzle can be adjusted to face the area where the residual coal behind the hydraulic support is located.

[0012] Furthermore, the front connecting rod of the hydraulic support is provided with a mounting base, and the second connecting part is rotatably connected to the mounting base.

[0013] Compared with the prior art, the coal mining device of this utility model has at least the following beneficial effects: By rotatably connecting the first connecting part of the first connector to the nozzle around a first axis, and rotatably connecting the second connecting part of the first connector to the front connecting rod of the hydraulic support around a second axis, with the first and second axes perpendicular, the nozzle, after being connected to the front connecting rod of the hydraulic support via the first connector, allows for omnidirectional adjustment of the nozzle orientation by rotating the nozzle relative to the first connector around the first axis and by rotating the first connector relative to the front connecting rod of the hydraulic support around the second axis. This enables the nozzle to be adjusted to face the area of ​​residual coal behind the hydraulic support without requiring repeated disassembly and reassembly of the nozzle to adjust its orientation. The nozzle assembly of this embodiment has a simple structure, and the nozzle orientation adjustment is flexible and convenient.

[0014] The coal mining device of this utility model, by including the nozzle assembly of any of the above embodiments, enables the coal mining device to have all the advantages of the above nozzle assembly, which will not be repeated here.

[0015] Additional aspects and advantages of this 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

[0016] The above and / or additional aspects and advantages of this utility model 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 structural schematic diagram of a coal mining device according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of a coal mining device according to an embodiment of the present utility model; Figure 3 This is a structural schematic diagram of a coal mining device according to an embodiment of the present utility model; Figure 4 This is a structural schematic diagram of a coal mining device according to an embodiment of the present utility model; Figure 5 This is a partially enlarged view of the nozzle assembly installed on the front connecting rod of the hydraulic support according to an embodiment of the present utility model; Figure 6 yes Figure 5 A plan view of the nozzle assembly shown; Figure 7 yes Figure 5 An exploded view of a portion of the nozzle assembly shown in the diagram; Figure 8 yes Figure 5 The three-dimensional view of the nozzle assembly shown indicates that the nozzle of the nozzle is facing a first orientation; Figure 9 yes Figure 5 The perspective view of the nozzle assembly shown shows the nozzle of the nozzle facing a second orientation; Figure 10 yes Figure 5 The diagram shows a perspective view of the nozzle assembly, with the nozzle of the nozzle facing a third position.

[0017] Figure label: Nozzle assembly 100; First axis 101; Second axis 102; Nozzle 10; Base 11; Liquid chamber 111; Liquid inlet 1111; Liquid outlet 1112; Connecting ear 12; Connecting connector 13; Nozzle 14; First connector 20; first connecting part 21; first stop block 211; first connecting post 212; Second connecting part 22; Fastener 23; First anti-vibration and anti-loosening component 24; First self-locking and anti-loosening component 25; Second connector 30; second stop block 31; second connecting post 32; second anti-vibration and anti-loosening component 33; second self-locking and anti-loosening component 34; Hydraulic support 200; base 201; front scraper conveyor 202; rear scraper conveyor 203; top beam 204; shield beam 205; tail beam 206; tail beam insert mechanism 207; column 208; front connecting rod 209; rear connecting rod 210; tail beam jack 2101; mounting base 2102; Coal mining machine 300; Coal mining face 1001; goaf 1002; residual coal 1003; coal block 1004; gangue 1005. Detailed Implementation

[0018] The embodiments of this utility model 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 this utility model, and should not be construed as limiting this utility model.

[0019] Please see Figures 1-4 This utility model discloses a coal mining device, which includes a coal mining machine 300, a hydraulic support 200, a front scraper conveyor 202, and a rear scraper conveyor 203. The hydraulic support 200 is located between the coal mining face 1001 and the goaf 1002, and includes a base 201, a top beam 204, a shield beam 205, a tail beam 206, a column 208, a front connecting rod 209, and a rear connecting rod 210. The front scraper conveyor 202 is located at the front of the base 201 and can push forward, while the rear scraper conveyor 203 is located at the rear of the base 201 and can pull towards the base 201.

[0020] One end of the protective beam 205 is hinged to the rear end of the top beam 204, and the other end of the protective beam 205 is hinged to the tail beam 206. The rear scraper conveyor 203 is located at the rear of the base 201 and below the tail beam 206. The column 208 is hinged between the top beam 204 and the base 201. The front connecting rod 209 and the rear connecting rod 210 are both hinged between the base 201 and the protective beam 205, with the front connecting rod 209 located in front of the rear connecting rod 210. The hydraulic support 200 also includes a tail beam jack 2101, one end of which is hinged to the protective beam 205, and the other end of which is hinged to the tail beam 206. The function of the tail beam jack 2101 is to provide support force for the tail beam 206 and to drive the tail beam 206 to swing. The tail beam 206 is internally equipped with a tail beam insert plate mechanism 207. The tail beam insert plate mechanism 207 extends to block the coal and gangue that collapses above the hydraulic support 200. The tail beam insert plate mechanism 207 retracts to release coal, so that the coal and gangue that collapses above the hydraulic support 200 falls onto the rear scraper conveyor 203.

[0021] Specifically, the coal mining machine 300 operates at the set low-end coal cutting height, and the front scraper conveyor 202 transports the coal out of the working face. During the system's backfilling and pushing (moving the support and pushing the front scraper conveyor 202), the remaining coal above the coal cut by the coal mining machine 300 will be induced to collapse, and the broken coal blocks 1004 will fall onto the deployed tail beam 206 (see [reference]). Figure 1 Tail beam jack 2101 drives tail beam 206 to swing toward base 201 and tail beam insert mechanism 207 retracts into tail beam 206 (see [link]). Figure 2 When the coal discharge window is opened, the broken coal chunks 1004 above the hydraulic support 200 fall onto the rear scraper conveyor 203, which then transports the coal out of the working face.

[0022] When the content of gangue 1005 in the crushed coal gangue to be released above the hydraulic support 200 exceeds a certain limit, the tail beam 206 swings away from the base 201 and the tail beam insert mechanism 207 extends (see [reference]). Figure 3 That is, the coal discharge window is closed, thereby preventing the coal and gangue above the hydraulic support 200 from falling. After the coal discharge window is closed, the rear scraper conveyor 203 is pulled toward the hydraulic support 200 (see [link]). Figure 4 The production process of the 1001 coal mining face usually follows the cycle of coal cutting: 300 coal mining machine inclined cutting → coal cutting → frame shifting → pushing forward scraper conveyor 202 → top coal caving → pulling back scraper conveyor 203.

[0023] Understandably, please continue reading. Figure 4 When the rear scraper conveyor 203 is pulled toward the hydraulic support 200, the remaining coal chunks 1004 above the hydraulic support 200 will fall under the action of gravity, thus forming "residual coal 1003 after the support" below the tail beam 206.

[0024] In coal mining, goaf fires have always been a major hidden danger threatening mine safety. Especially for the 1001 coal face, which employs longwall top-coal caving mining, the residual coal at the 200th hydraulic support erection becomes a significant contributing factor to goaf fires. Therefore, fire prevention and extinguishing measures for the residual coal at the 200th hydraulic support erection are crucial for preventing goaf fires.

[0025] Fire prevention and extinguishing of the residual coal 1003 behind the 200 hydraulic supports typically involves spraying fire-retardant materials (such as water-based gel fire-retardant materials) onto the residual coal 1003 using nozzles 10. This forms an oxygen-barrier, heat-absorbing, and cooling protective layer on the surface of the residual coal 1003. Understandably, to ensure the fire-retardant material is accurately sprayed onto the residual coal 1003 area, the nozzle 14 of the nozzle 10 needs to be adjusted to align with the area. In other words, adjusting the orientation of the nozzle 14 of the nozzle 10 is crucial. However, existing nozzles 10 suffer from inconvenient nozzle orientation adjustment and complex structure.

[0026] To resolve the above technical issues, please refer to Figures 5-10 This utility model discloses a nozzle assembly 100, which includes a nozzle 10 and a first connector 20. The first connector 20 is provided with a first connecting part 21 and a second connecting part 22 connected to each other. The first connecting part 21 is rotatably connected to the nozzle 10 about a first axis 101, and the second connecting part 22 is adapted to be rotatably connected to a base for mounting the nozzle assembly 100 about a second axis 102. The first axis 101 and the second axis 102 are perpendicular to each other.

[0027] Optionally, please refer to Figures 1-4 The base for mounting the nozzle assembly 100 can be the front connecting rod 209 of the hydraulic support 200, in which case the nozzle assembly 100 is mounted and fixed on the front connecting rod 209 of the hydraulic support 200. However, this application is not limited to this; the base for mounting the nozzle assembly 100 can also be the shield beam 205 or the rear connecting rod 210 of the hydraulic support 200, etc., in which case the nozzle assembly 100 is mounted and fixed on the shield beam 205 or the rear connecting rod 210 of the hydraulic support 200. In the following description of this application, the front connecting rod 209 of the hydraulic support 200 is used as an example for mounting and fixing the nozzle assembly 100, but this should not be construed as a limitation of this application.

[0028] By rotatably connecting the first connecting part 21 to the nozzle 10 about the first axis 101, the nozzle 10 can rotate relative to the first connecting member 20 about the first axis 101. By rotatably connecting the second connecting part 22 to the front connecting rod 209 about the second axis 102, the first connecting member 20 can rotate relative to the front connecting rod 209 about the second axis 102. Thus, after the nozzle 10 is connected to the front connecting rod 209 of the hydraulic support 200 via the first connecting member 20, by rotating the nozzle 10 relative to the first connecting member 20 about the first axis 101 and by rotating the first connecting member 20 relative to the front connecting rod 209 about the second axis 102, the orientation of the nozzle 14 of the nozzle 10 can be universally adjusted (see [reference]). Figures 8-10This allows the nozzle 14 of the nozzle 10 to be adjusted toward the area where the residual coal 1003 behind the hydraulic support 200 is located, without having to adjust the orientation of the nozzle 14 by repeatedly disassembling and assembling the nozzle 10.

[0029] According to the nozzle assembly 100 of this utility model embodiment, by rotatably connecting the first connecting portion 21 of the first connecting member 20 to the nozzle 10 around the first axis 101, and rotatably connecting the second connecting portion 22 of the first connecting member 20 to the front connecting rod 209 of the hydraulic support 200 around the second axis 102, and with the first axis 101 and the second axis 102 being perpendicular, after the nozzle 10 is connected to the front connecting rod 209 of the hydraulic support 200 through the first connecting member 20, by rotating the nozzle 10 relative to the first connecting member 20 around the first axis 101 and by rotating the first connecting member 20 relative to the front connecting rod 209 of the hydraulic support 200 around the second axis 102, the orientation of the nozzle 14 of the nozzle 10 can be universally adjusted, so that the nozzle 14 of the nozzle 10 can be adjusted to face the area where the residual coal 1003 behind the hydraulic support 200 is located, without having to adjust the orientation of the nozzle 14 by repeatedly disassembling and assembling the nozzle 10. The nozzle assembly 100 of this utility model embodiment has a simple structure, and the orientation adjustment of the nozzle 14 of the nozzle 10 is flexible and convenient.

[0030] Please see Figures 6-7 The first connecting portion 21 includes a first stop block 211 and a first connecting post 212. The first connecting post 212 extends along the extension direction of the first axis 101. One end of the first connecting post 212 is connected to the first stop block 211. A fixing member 23 is connected to the first connecting post 212. The nozzle 10 is rotatably fitted onto the first connecting post 212 and sandwiched between the first stop block 211 and the fixing member 23. By rotating the nozzle 10 relative to the first connecting post 212, the nozzle 10 can rotate relative to the first connecting member 20 about the first axis 101. By clamping the nozzle 10 between the first stop block 211 and the fixing member 23, the nozzle 10 can be positioned on the first connecting post 212. That is, after the nozzle 10 rotates and adjusts the position of the nozzle 14 of the nozzle 10 relative to the first connecting post 212, the nozzle 10 is clamped between the first stop block 211 and the fixing member 23 by tightening the fixing member 23, thereby fixing the connection position between the nozzle 10 and the first connecting member 20.

[0031] Optionally, the first connecting post 212 is threadedly connected to the fixing member 23. In this case, the first connecting post 212 can be a stud and the fixing member 23 can be a nut. By making the first connecting post 212 and the fixing member 23 threadedly connected, the connection between the first connecting post 212 and the fixing member 23 is stable and not easy to loosen. At the same time, the fixing member 23 is easy to install and remove.

[0032] Please see Figure 6A first anti-vibration and anti-loosening component 24 is provided between the fixing component 23 and the nozzle 10, and a first self-locking anti-loosening component 25 is provided between the first stop block 211 and the nozzle 10. Optionally, the first anti-vibration and anti-loosening component 24 can be a spring washer, and the first self-locking anti-loosening component 25 can be a double-layered self-locking anti-loosening washer. By providing the first anti-vibration and anti-loosening component 24, the connection between the fixing component 23 and the first connecting column 212 can be prevented from loosening due to vibration after the nozzle assembly 100 is installed on the front connecting rod 209 of the hydraulic support 200. By providing the first self-locking anti-loosening component 25, the nozzle 10 and the first stop block 211 can be prevented from loosening after the nozzle 10 has adjusted the orientation of its nozzle 14, which would cause the nozzle 10 to rotate relative to the first connecting column 212 and thus change the orientation of the nozzle 14, making it impossible to accurately aim at the area to be sprayed.

[0033] In some examples, only the fastener 23 and the nozzle 10 are provided with a first anti-vibration and anti-loosening component 24, and no first self-locking anti-loosening component 25 is provided between the first stop block 211 and the nozzle 10211; in other examples, no first anti-vibration and anti-loosening component 24 is provided between the fastener 23 and the nozzle 10, and only the first self-locking anti-loosening component 25 is provided between the first stop block 211 and the nozzle 10.

[0034] Please see Figures 6-7 The nozzle 10 includes a base 11 and a connecting lug 12. The base 11 defines a liquid-containing chamber 111. The base 11 has an inlet 1111 and an outlet 1112 communicating with the liquid-containing chamber 111. The inlet 1111 is connected to a slurry delivery pipe, allowing fire-extinguishing slurry to enter the liquid-containing chamber 111. Optionally, the inlet 1111 can be connected to a connecting joint 13, which connects the inlet 1111 to the slurry delivery pipe, thus making the connection between the slurry delivery pipe and the inlet 1111 flexible and convenient. The outlet 1112 is connected to a nozzle 14, allowing the slurry to enter the liquid-containing chamber 111 and be sprayed onto the desired spraying area through the nozzle 14. Optionally, both the connecting joint 13 and the nozzle 14 are threadedly connected to the nozzle 10.

[0035] The connecting ear 12 is connected to the side of the base 11 opposite to the liquid outlet 1112. The connecting ear 12 is rotatably fitted onto the first connecting post 212 and clamped between the first stop block 211 and the fixing member 23. That is to say, the nozzle 10 is connected to the first connecting member 20 through the connecting ear 12, which is convenient. At the same time, by connecting the connecting ear 12 to the side of the base 11 opposite to the liquid outlet 1112, the orientation adjustment of the nozzle 14 is made more convenient.

[0036] Please continue reading. Figures 6-7The front connecting rod 209 is provided with a connection hole. The nozzle assembly 100 also includes a second connecting member 30, which includes a second stop block 31 and a second connecting post 32. The second connecting post 32 extends along the extension direction of the second axis 102. One end of the second connecting post 32 is connected to the second stop block 31, and the other end of the second connecting post 32 is connected to the connection hole. The second connecting part 22 is rotatably sleeved on the second connecting post 32 and clamped between the second stop block 31 and the front connecting rod 209. By rotating the second connecting part 22 of the first connecting member 20 relative to the second connecting post 32, the first connecting member 20 can rotate relative to the front connecting rod 209 of the hydraulic support 200 relative to the second axis 102. By clamping the second connecting part 22 between the second stop block 31 and the front connecting rod 209, the second connecting part 22 of the first connecting member 20 can be positioned on the second connecting post 32.

[0037] Optionally, the second connecting post 32 is threaded into the connecting hole, thereby ensuring a stable connection between the second connecting post 32 and the front connecting rod 209, preventing loosening, and facilitating easy assembly and disassembly. The second connecting piece 30 can be a bolt, the second stop block 31 can be the nut portion of the bolt, and the second connecting post 32 can be the threaded portion of the bolt.

[0038] Please see Figure 6 A second anti-vibration and anti-loosening component 33 is provided between the second stop block 31 and the second connecting part 22, and a second self-locking anti-loosening component 34 is provided between the second connecting part 22 and the front connecting rod 209. Optionally, the second anti-vibration and anti-loosening component 33 can be a spring washer, and the second self-locking anti-loosening component 34 can be a double-layered self-locking anti-loosening washer.

[0039] By providing the second anti-vibration and anti-loosening component 33, the second stop block 31 and the second connecting part 22 can be prevented from becoming loose due to vibration after the nozzle assembly 100 is installed on the front connecting rod 209 of the hydraulic support 200. By providing the second self-locking anti-loosening component 34, it is possible to prevent the second connecting part 22 and the front connecting rod 209 from becoming loose after the nozzle 10 has adjusted the orientation of its nozzle 14, which would cause the second connecting part 22 to rotate relative to the second connecting post 32 and thus change the orientation of the nozzle 14, making it impossible to accurately aim at the area to be sprayed.

[0040] In some examples, the second anti-vibration and anti-loosening component 33 is provided only between the second stop block 31 and the second connecting part 22, and the second self-locking anti-loosening component 34 is not provided between the second connecting part 22 and the front connecting rod 209; in other examples, the second anti-vibration and anti-loosening component 33 is not provided between the second stop block 31 and the second connecting part 22, and the second self-locking anti-loosening component 34 is provided only between the second connecting part 22 and the front connecting rod 209.

[0041] Optionally, please refer to Figures 5-6The front connecting rod 209 of the hydraulic support 200 is provided with a mounting base 2102. The second connecting part 22 is rotatably connected to the mounting base 2102 around the second axis 102. At this time, the connecting hole mentioned above is formed on the mounting base 2102. That is to say, the second connecting part 22 of the first connecting member 20 is connected to the front connecting rod 209 of the hydraulic support 200 through the mounting base 2102, thereby making the connection between the first connecting member 20 and the front connecting rod 209 of the hydraulic support 200 more flexible.

[0042] It should be noted that in the above description of this utility model, the purpose of using the nozzle assembly 100 to spray fire prevention and extinguishing materials towards the residual coal 1003 behind the frame in longwall top coal caving mining to control fire in the goaf 1002 is described as an example. However, this application is not limited to this. The nozzle assembly 100 of this utility model embodiment can also be used for dust control or cooling treatment in coal mining or other application fields. In this case, the substrate used to install the nozzle assembly 100 is selected according to the actual application needs.

[0043] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 utility model according to the specific circumstances.

[0044] In the description of this utility model, 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 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 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.

[0045] 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 present 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.

[0046] Although embodiments of the present 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 present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A nozzle assembly, characterized in that, include: spray nozzle; A first connector has a first connecting portion and a second connecting portion connected to each other. The first connecting portion is rotatably connected to the nozzle about a first axis, and the second connecting portion is adapted to be rotatably connected to a base for mounting the nozzle assembly about a second axis. The first axis and the second axis are perpendicular to each other.

2. The nozzle assembly according to claim 1, characterized in that, The first connecting part includes a first stop block and a first connecting post. The first connecting post extends along the extension direction of the first axis. One end of the first connecting post is connected to the first stop block. A fixing member is connected to the first connecting post. The nozzle is rotatably sleeved on the first connecting post and sandwiched between the first stop block and the fixing member.

3. The nozzle assembly according to claim 2, characterized in that, The first connecting post is threadedly connected to the fixing member.

4. The nozzle assembly according to claim 2, characterized in that, A first anti-vibration and anti-loosening component is provided between the fixing member and the nozzle; and / or A first self-locking anti-loosening component is provided between the first stop block and the nozzle.

5. The nozzle assembly according to claim 2, characterized in that, The nozzle includes a base and a connecting lug. The base defines a liquid-containing cavity. The base is provided with an inlet and an outlet that communicate with the liquid-containing cavity. The connecting lug is connected to the side of the base opposite to the outlet. The connecting lug is rotatably fitted onto the first connecting post and sandwiched between the first stop block and the fixing member.

6. The nozzle assembly according to claim 1, characterized in that, The substrate is provided with a connection hole. The nozzle assembly also includes a second connector. The second connector includes a second stop block and a second connecting post. The second connecting post extends along the extension direction of the second axis. One end of the second connecting post is connected to the second stop block. The other end of the second connecting post is connected to the connection hole. The second connecting part is rotatably sleeved on the second connecting post and sandwiched between the second stop block and the substrate.

7. The nozzle assembly according to claim 6, characterized in that, The second connecting post is threaded into the connecting hole.

8. The nozzle assembly according to claim 6, characterized in that, A second anti-vibration and anti-loosening component is provided between the second stop block and the second connecting part; and / or A second self-locking anti-loosening component is provided between the second connecting part and the base.

9. A coal mining device, characterized in that, include: Hydraulic supports; According to any one of claims 1-8, the second connecting portion is rotatably connected to the hydraulic support about the second axis, so that the nozzle of the nozzle can be adjusted to face the area of ​​residual coal behind the hydraulic support.

10. The coal mining apparatus according to claim 9, characterized in that, The front connecting rod of the hydraulic support is provided with a mounting base, and the second connecting part is rotatably connected to the mounting base.

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