Spray head assembly and coal mining device

Abstract

The utility model discloses a kind of nozzle assembly and coal mining device, nozzle assembly includes: nozzle frame, it is defined into containing cavity in nozzle frame, nozzle frame is equipped with with containing cavity intercommunication import and nozzle outlet, nozzle outlet is suitable for connecting nozzle, import is suitable for connecting spraying medium source;Mounting seat, mounting seat is suitable for being connected on installation base body, nozzle frame is stacked on mounting seat, and position locking structure and position guide structure are equipped between nozzle frame and mounting seat, position locking structure has unlocking state and locking state, when position locking structure is in unlocking state, nozzle frame can be rotated around rotating axis relative to mounting seat under the guidance of position guide structure to adjust the orientation of nozzle outlet;When position locking structure is in locking state, the relative position between nozzle frame and mounting seat is fixed.Nozzle assembly according to the utility model, the positioning angle of nozzle frame relative to installation base body can be flexibly adjusted, and the versatility of nozzle frame is good, and nozzle spraying precision is high.

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 widely used in industrial dust suppression, cooling and other technical fields. Sprinklers are usually mounted and supported on the mounting base by a sprinkler frame. For example, when sprinklers are used for dust suppression in coal mining faces, the sprinklers are mounted and fixed on the rocker arm of the coal mining machine by a sprinkler frame.

[0003] The existing nozzle holders have a relatively simple positioning angle on the mounting base, which cannot flexibly adjust the orientation of the nozzles according to actual needs. Therefore, the nozzle holders have poor versatility and the nozzles have low spraying accuracy. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a nozzle assembly in which the positioning angle of the nozzle holder relative to the mounting base can be flexibly adjusted, the nozzle holder has good versatility, and the nozzle spraying accuracy is high.

[0005] A nozzle assembly according to an embodiment of the present invention includes: a nozzle holder, wherein a receiving cavity is defined within the nozzle holder, the nozzle holder has an inlet and an outlet communicating with the receiving cavity, the outlet being adapted to connect a nozzle, and the inlet being adapted to connect a spray medium source; and a mounting base, wherein the mounting base is adapted to connect to a mounting substrate, 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 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.

[0006] According to the nozzle assembly of this utility model embodiment, by mounting the nozzle frame onto the mounting base via a mounting seat, and by providing an adjustment guide structure and a position locking structure between the nozzle frame and the mounting base, the orientation of the nozzle frame fixed on the mounting base can be flexibly adjusted in practical applications, thereby allowing the nozzle orientation to be precisely aimed at the desired dust suppression area. The nozzle assembly of this utility model embodiment features a versatile nozzle frame and high nozzle spraying accuracy.

[0007] In addition, the nozzle assembly according to the embodiments of this utility model may also have the following additional technical features: According to some embodiments of the present invention, the rotation axis is perpendicular to the central axis of the nozzle.

[0008] According to some embodiments of the present invention, the adjustment guide structure includes a pivot shaft and a pivot hole extending along the rotation axis. One of the pivot shaft and the pivot hole is disposed on the nozzle frame, and the other of the pivot shaft and the pivot hole is disposed on the mounting base. The pivot shaft is fitted into the pivot hole.

[0009] According to some embodiments of the present invention, the adjustment guide structure includes a pivot connector extending along the rotation axis, a first pivot hole provided on the nozzle frame, and a second pivot hole provided 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.

[0010] According to some embodiments of the present invention, 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 frame, 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 selectively fit into one of the plurality of second locking positioning holes.

[0011] According to some embodiments of the present invention, the position locking structure includes two, and the two position locking structures are symmetrical about the rotation axis.

[0012] According to some embodiments of the present invention, 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.

[0013] According to some embodiments of the present invention, the nozzle holder further includes an extension portion connected to the second end of the body portion. The receiving cavity includes an extension cavity formed within the extension portion and communicating with the body cavity. The nozzle outlet includes a plurality of second nozzle outlets disposed on the extension portion and communicating with the extension cavity. The extension portion 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 direction of the extension portion, and each of the plurality of second nozzle outlets penetrates the second sidewall of the extension portion 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 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.

[0014] According to some embodiments of the present invention, the nozzle assembly further includes a protective cover plate, which is disposed on the side of the nozzle frame away from the mounting base to cover the nozzle.

[0015] A coal mining apparatus according to a second aspect of the present invention includes: a coal mining machine, the coal mining machine including a machine body, a rocker arm and a cutting drum, one end of the rocker arm being connected to the machine body and the other end of the rocker arm being connected to the cutting drum; and a nozzle assembly according to the first aspect of the present invention, wherein the mounting base is connected to the rocker arm and the nozzle outlet faces the cutting drum.

[0016] The coal mining device according to the embodiments of the present invention, by providing the nozzle assembly according to the first aspect of the present invention, enables the coal mining device to have all the advantages of the nozzle assembly of the first aspect of the present invention, which will not be repeated here.

[0017] 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

[0018] 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 schematic diagram of the nozzle assembly structure according to an embodiment of the present utility model, wherein the nozzle bracket is located at a first position relative to the mounting base; Figure 2 yes Figure 1 A schematic diagram of the nozzle assembly from another angle; Figure 3 yes Figure 2An exploded view of the nozzle assembly shown; Figure 4 yes Figure 3 A partial structural schematic diagram of the nozzle assembly shown; Figure 5 yes Figure 4 Exploded view of the structure shown; Figure 6 yes Figure 5 The front view of the nozzle holder shown; Figure 7 yes Figure 6 The nozzle holder shown is a cross-sectional view along line AA; Figure 8 yes Figure 6 An exploded view of the nozzle mount shown; Figure 9 This is a schematic diagram of the nozzle assembly structure according to an embodiment of the present utility model, wherein the nozzle bracket is located at a second position relative to the mounting base; Figure 10 yes Figure 9 An exploded view of the nozzle assembly shown; Figure 11 This is a structural schematic diagram of a coal mining device according to an embodiment of the present utility model; Figure 12 yes Figure 11 The diagram shows a partial structural schematic of the coal mining device.

[0019] Figure label: 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; pipe connection 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 70; pivot clearance hole 71; locking clearance hole 72; Fastening connector 81; First fastening fixing hole 82; Second fastening fixing hole 83; Coal mining machine 200; machine body 201; rocker arm 202; cutting drum 203. Detailed Implementation

[0020] 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.

[0021] The following is for reference. Figures 1-10 This invention describes a nozzle assembly 100 according to a first aspect embodiment of the present invention. It should be noted that the spraying medium that the nozzle assembly 100 can use can be selected according to actual needs. For example, it can be used to spray water, or a mixed medium formed by mixing water with dust suppressing, cooling, or other materials. Furthermore, the nozzle assembly 100 can be used not only to spray liquid media, but also to spray foamy media. In the following description of the present invention, the example given is the use of the nozzle assembly 100 to spray foamed dust suppressant for dust suppression in coal mining faces; however, this should not be construed as a limitation of this application.

[0022] refer to Figures 1-7 As shown, the nozzle assembly 100 according to an embodiment of the present invention includes: a nozzle holder 10, a nozzle 30, and a mounting base 20.

[0023] 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 a nozzle 30, and the inlet 10a1 is adapted to connect to a spraying medium source (e.g., foam dust suppressant). The spraying medium source enters the receiving cavity 10a through the inlet 10a1, and is then sprayed to the desired dust suppression area through the nozzle 30 connected to the outlet 10a2.

[0024] The mounting base 20 is adapted to be connected to a mounting base. It should be noted that the mounting base described in this application is an object used to mount and fix the nozzle assembly 100. For example, when the nozzle assembly 100 is used to spray foam dust suppressant for dust suppression in coal mining faces, the mounting base can be the rocker arm 202 of the coal mining machine 200 (e.g.,...). Figure 11 and Figure 12 That is, at this time, the mounting base 20 can be installed and fixed on the rocker arm 202 of the coal mining machine 200.

[0025] The nozzle holder 10 is stacked on the mounting base 20, and an adjustment guide structure and a position locking structure are provided between the nozzle holder 10 and the 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, the nozzle holder 10 can rotate relative to the mounting base 20 about the rotation axis 101 under the guidance of the adjustment guide structure to adjust the orientation of the nozzle outlet 10a2; when the position locking structure is in the locked state, the relative position between the nozzle holder 10 and the mounting base 20 is fixed.

[0026] In other words, the mounting base 20 is connected to the mounting base, and the nozzle holder 10 is connected to the mounting base 20, thus allowing the nozzle holder 10 to be fixedly mounted on the mounting base. 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.

[0027] 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.

[0028] According to the nozzle assembly 100 of this utility model embodiment, by mounting the nozzle holder 10 to the mounting base via the mounting seat 20, and by providing an adjustment guide structure and a position locking structure between the nozzle holder 10 and the mounting seat 20, the orientation of the nozzle holder 10 fixed to the mounting base can be flexibly adjusted in practical applications, thereby adjusting the orientation of the nozzle 30 to precisely align it with the desired dust suppression area. The nozzle assembly 100 of this utility model embodiment features good versatility of the nozzle holder 10 and high spraying accuracy of the nozzle 30.

[0029] Optionally, please refer to Figures 3-7 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.

[0030] In one embodiment of this utility model, the adjustment 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 adjustment guide structure is simple in structure and easy to manufacture.

[0031] In another embodiment of this utility model, please refer to Figures 2-3 as well as Figures 9-10 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.

[0032] In one embodiment of this utility model, please refer to Figures 2-3 as well as Figures 9-10 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.

[0033] 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 2-3 and Figures 9-10In 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. Figure 2 (as shown) and second position (as shown) Figure 9 The location shown in the image.

[0034] 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.

[0035] 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.

[0036] Alternatively, please continue reading Figures 2-3 as well as Figures 9-10 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.

[0037] Please see Figures 4-8 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.

[0038] It should be noted that when the nozzle assembly 100 is mounted and fixed on the mounting base, the first end 113 is located on the side of the second end 114 furthest from the dust settling area. For example, please refer to... Figures 11-12When the nozzle assembly 100 is mounted on the rocker arm 202 of the coal mining machine 200, the first end 113 is located on the side of the second end 114 away from the cutting drum 203 of the coal mining machine 200. 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 203 of the coal mining machine 200, thereby making the dust suppression spray accuracy of the nozzle assembly 100 higher.

[0039] Please refer to the figures for further details. Figures 4-8 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.

[0040] 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.

[0041] 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.

[0042] Please see Figures 1-3 as well as Figures 9-10 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.

[0043] Please see Figures 3-5 The nozzle assembly 100 also includes a pipe connection connector 40, which is connected to the inlet 10a1 of the nozzle holder 10. The pipe conveying the spraying medium can be connected to the inlet 10a1 through the pipe connection connector 40, making it easier to connect the nozzle holder 10 to the pipe. Therefore, the protective cover 70 also serves to cover the pipe connection connector 40, thereby preventing it from being damaged.

[0044] Optionally, please refer to Figures 2-3 as well as Figures 9-10 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 1-3 as well as Figures 9-10 In the example shown, the fastening connector 81 may include five spaced apart from each other along the length of the nozzle holder 10.

[0045] Alternatively, please continue reading Figures 1-3 as well as Figures 9-10 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.

[0046] Alternatively, please continue reading Figures 1-3 as well as Figures 9-10 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.

[0047] See below. Figures 11-12The coal mining apparatus according to a second aspect embodiment of the present invention includes a coal mining machine 200 and a nozzle assembly 100. The coal mining machine 200 includes a body 201, a rocker arm 202, and a cutting drum 203. One end of the rocker arm 202 is connected to the body 201, and the other end of the rocker arm 202 is connected to the cutting drum 203. A mounting base 20 is connected to the rocker arm 202, and the nozzle outlet 10a2 faces the cutting drum 203. When the coal mining machine 200 is working, the cutting drum 203 will generate a large amount of coal dust as it cuts the coal. The nozzle assembly 100 is used to spray foam dust suppressant towards the coal dust area, thereby achieving the purpose of dust reduction.

[0048] The coal mining device according to the embodiment of the present utility model, by providing the nozzle assembly 100 according to the first aspect embodiment of the present utility model, enables the coal mining device to have all the advantages of the nozzle assembly 100 of the first aspect embodiment, which will not be repeated here.

[0049] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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: A nozzle holder, wherein a receiving cavity is defined within the nozzle holder, the nozzle holder is provided with an inlet and a spray outlet communicating with the receiving cavity, the spray outlet is connected to a nozzle, and the inlet is adapted to connect to a spraying medium source; A mounting base is provided, adapted to be connected to a mounting substrate. A 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.

2. The nozzle assembly according to claim 1, characterized in that, The rotation axis is perpendicular to the central axis of the nozzle.

3. The nozzle assembly according to claim 1, characterized in that, The adjustment guide structure includes a pivot shaft and a pivot hole extending along the rotation axis. One of the pivot shaft and the pivot hole is located on the nozzle holder, and the other of the pivot shaft and the pivot hole is located on the mounting base. The pivot shaft is fitted into the pivot hole.

4. The nozzle assembly according to claim 1, 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.

5. The nozzle assembly according to claim 1, 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.

6. The nozzle assembly according to claim 5, characterized in that, The position locking structure includes two structures, which are symmetrical about the rotation axis.

7. The nozzle assembly according to claim 1, 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.

8. The nozzle assembly according to claim 7, 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.

9. The nozzle assembly according to claim 1, characterized in that, It also includes a protective cover plate, which is placed on the side of the nozzle holder away from the mounting base to cover the nozzle.

10. A coal mining device, characterized in that, include: A coal mining machine, comprising a machine body, a rocker arm, and a cutting drum, wherein one end of the rocker arm is connected to the machine body, and the other end of the rocker arm is connected to the cutting drum; The nozzle assembly according to any one of claims 1 to 9, wherein the mounting base is connected to the rocker arm and the nozzle outlet faces the cutting roller.

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