Nozzle assembly and coal mining machine

Abstract

The utility model relates to the technical field of coal mining machines, in particular to a nozzle assembly and a coal mining machine. The nozzle assembly comprises a nozzle body provided with a first inner cavity and a second inner cavity which are communicated with each other, the first inner cavity can also be communicated with a water supply pipeline, and the second inner cavity is communicated with a nozzle; the valve element is adjustable along the axial position of the second inner cavity and is provided with a first position and a second position; when the valve element is located at the first position, the first end of the valve element blocks the nozzle, when the valve element is located at the second position, the first end of the valve element opens the nozzle, and liquid entering the second inner cavity from the first inner cavity drives the valve element to move from the first position to the second position. The reset piece is arranged in the second inner cavity and used for resetting the valve element to the first position from the second position. According to the nozzle assembly provided by the utility model, when mist is not sprayed or liquid pressure is insufficient, the reset piece is used for driving the valve core to block the nozzle, so that the nozzle is effectively prevented from being blocked, and the spraying dust falling efficiency of the nozzle assembly is further improved.

Description

Technical Field

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

[0002] In traditional coal mining machines, the nozzles of the spray dust suppression system are constantly exposed when the system is not spraying or when the water pressure is low. As a result, the nozzles are easily clogged by coal dust and other impurities when the coal mining machine is operating underground. This leads to a decrease in the spray efficiency of the spray dust suppression system and consequently affects the dust suppression efficiency. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, this utility model provides a nozzle assembly that can use a reset element to drive the valve core to seal the nozzle when there is no spray or insufficient liquid pressure, so as to effectively prevent the nozzle from becoming blocked.

[0005] This utility model also provides a coal mining machine including the above-mentioned nozzle assembly.

[0006] A nozzle assembly according to a first aspect of the present invention, applied to a coal mining machine, includes:

[0007] The nozzle body has a first inner cavity and a second inner cavity that are interconnected. The first inner cavity can also be connected to a water supply pipeline, and the second inner cavity is connected to the nozzle.

[0008] The valve core is axially adjustable along the second inner cavity and has a first position and a second position; when the valve core is in the first position, the first end of the valve core blocks the nozzle, and when the valve core is in the second position, the first end of the valve core opens the nozzle, and the liquid entering the second inner cavity from the first inner cavity can drive the valve core to move from the first position to the second position.

[0009] A reset element is disposed in the second inner cavity and abuts against the second end of the valve core. The reset element is used to reset the valve core from the second position to the first position.

[0010] Optionally, the valve core includes:

[0011] The plugging head is used to plug the nozzle when the valve core is in the first position;

[0012] The valve stem and the plug head are connected to the first end of the valve stem;

[0013] The boss is connected to the second end of the valve stem, and the side of the boss is slidably connected to the inner wall of the second inner cavity.

[0014] Optionally, the nozzle is a conical orifice, and the nozzle and the second inner cavity are coaxially arranged; the part of the sealing head used to seal the nozzle is conical, and the sealing head and the second inner cavity are coaxially arranged.

[0015] Optionally, there are at least two first cavities, and the axial direction of at least two first cavities is parallel to the axial direction of the second cavity; wherein, when the valve core is in the first position, the corresponding connecting hole of each first cavity and the second cavity is located above the boss.

[0016] Optionally, the boss is fitted with a high-pressure water seal, which is slidably sealed to the inner wall of the second inner cavity.

[0017] Optionally, the nozzle body is provided with a screw plug, and the screw plug is located on the side of the second inner cavity away from the nozzle. The screw plug, the second inner cavity and the second end of the valve core form a mounting cavity for installing the reset component.

[0018] Optionally, a sealing ring is provided on the contact surface between the screw plug and the nozzle body.

[0019] Optionally, the reset element is a leaf spring.

[0020] Optionally, the plate spring includes two arc-shaped spring plates, with the open ends of the two arc-shaped spring plates facing away from each other; wherein, the open end of one of the two arc-shaped spring plates faces the second end of the valve core.

[0021] A coal mining machine according to a second aspect of the present invention is characterized in that it includes the nozzle assembly of the first aspect and various embodiments.

[0022] One of the above technical solutions has at least the following advantages or beneficial effects:

[0023] In one embodiment of the present invention, a nozzle assembly is provided on the nozzle body, which is connected to a water supply pipeline and to a second inner cavity, which is connected to both the first inner cavity and the nozzle opening. A valve core is slidably disposed in the second inner cavity, having a first position and a second position. When the valve core is in the first position, it blocks the nozzle opening. As the hydraulic pressure in the second inner cavity gradually increases, it can push the valve core to move from the first position to the second position. When the valve core is in the second position, it opens the nozzle opening, allowing liquid to flow out and spray. A reset member abuts against the second end of the valve core, and the reset member can drive the valve core to move from the second position to the first position, thus blocking the nozzle opening. Therefore, the nozzle assembly provided by the present invention can effectively prevent nozzle blockage by using the reset member to drive the valve core to block the nozzle opening when there is no spray or insufficient liquid pressure, thereby improving the dust suppression efficiency of the nozzle assembly.

[0024] The coal mining machine provided in this embodiment of the utility model is equipped with the nozzle assembly described above. Since the nozzle assembly has the above-mentioned technical effects, the coal mining machine equipped with the nozzle assembly should also have the corresponding technical effects. Attached Figure Description

[0025] Figure 1 A schematic diagram of the nozzle assembly according to an embodiment of the present invention is shown;

[0026] Figure 2 A schematic diagram of the nozzle assembly according to another embodiment of the present invention is shown.

[0027] [Explanation of Labels in the Attached Image]

[0028] 1. Nozzle body; 101. First inner cavity; 102. Second inner cavity; 103. Nozzle; 104. Communicating hole;

[0029] 2. Valve core; 201. Plug head; 202. Valve stem; 203. Boss;

[0030] 3. Reset component, 301, arc-shaped spring sheet;

[0031] 4. High-pressure water seal;

[0032] 5. Screw plug;

[0033] 6. Sealing ring. Detailed Implementation

[0034] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] While some anti-clogging nozzles exist in the existing technology, most are ineffective, have complex structures, and high maintenance costs, making them difficult to meet practical application needs. For example, the patent with patent number [number missing], although it makes the nozzle anti-clogging by setting an anti-clogging device inside the nozzle, requires connecting the anti-clogging nozzle in series with the pipeline. Therefore, although this patent does not require water filtration, impurities entering the pipeline may cause blockage, thus affecting the nozzle's dust suppression efficiency.

[0036] Therefore, a nozzle that can effectively prevent nozzle clogging and has high dust suppression efficiency urgently needs to be studied.

[0037] To address at least one of the technical problems existing in the prior art or related technologies, this utility model provides a nozzle assembly comprising a nozzle body, a valve core, and a reset member. The nozzle body has a first inner cavity and a second inner cavity that are interconnected. The first inner cavity can also be connected to a water supply pipeline, and the second inner cavity is connected to a nozzle outlet. The valve core is axially adjustable along the second inner cavity and has a first position and a second position. When the valve core is in the first position, the first end of the valve core blocks the nozzle outlet. When the valve core is in the second position, the first end of the valve core opens the nozzle outlet, allowing liquid entering the second inner cavity from the first inner cavity to drive the valve core to move from the first position to the second position. The reset member is disposed in the second inner cavity and abuts against the second end of the valve core, and is used to reset the valve core from the second position to the first position. The nozzle assembly provided by this utility model can effectively prevent nozzle blockage by using the reset member to drive the valve core to block the nozzle outlet when there is no spray or insufficient liquid pressure, thereby improving the dust suppression efficiency of the nozzle assembly.

[0038] The following description, with reference to the accompanying drawings, describes nozzle assemblies and coal mining machines according to some embodiments provided by the present invention.

[0039] See Figure 1 and Figure 2 This utility model provides a nozzle assembly according to one embodiment, applied to a coal mining machine. The nozzle assembly includes a nozzle body 1, a valve core 2, and a reset member 3. The nozzle body 1 has a first inner cavity 101 and a second inner cavity 102 that are interconnected. The first inner cavity 101 can also be connected to a water supply pipeline, and the second inner cavity 102 is connected to a nozzle 103. The valve core 2 is axially adjustable along the second inner cavity 102 and has a first position and a second position. When the valve core 2 is in the first position, the first end of the valve core 2 blocks the nozzle 103. When the valve core 2 is in the second position, the first end of the valve core 2 opens the nozzle 103, and the liquid entering the second inner cavity 102 from the first inner cavity 101 can drive the valve core 2 to move from the first position to the second position. The reset member 3 is disposed in the second inner cavity 102 and abuts against the second end of the valve core 2. The reset member 3 is used to reset the valve core 2 from the second position to the first position.

[0040] Here, the nozzle body 1 can be installed on the coal mining machine via external threads. After the nozzle body 1 is installed on the coal mining machine, the water supply pipeline on the coal mining machine is connected to the first inner cavity 101 so that the liquid in the water supply pipeline flows into the second inner cavity 102 through the first inner cavity 101 and is then sprayed out from the nozzle 103 connected to the second inner cavity 102.

[0041] It should be noted that, see Figure 1When valve core 2 is in the first position, it blocks nozzle 103. Liquid in the water supply pipeline enters the second inner cavity 102 through the first inner cavity 101 and fills the second inner cavity 102. Initially, valve core 2 has no displacement. However, as the hydraulic pressure in the second inner cavity 102 gradually increases and exceeds the first preload of the reset member 3, the liquid in the second inner cavity 102 begins to push valve core 2 from the first position to the second position. Simultaneously, the liquid in the second inner cavity 102 compresses the reset member 3. When the hydraulic pressure in the second inner cavity 102 exceeds the second preload of the reset member 3, see [link to relevant documentation]. Figure 2 When valve core 2 reaches the second position, it opens nozzle 103, allowing liquid in the second inner cavity 102 to flow out and spray. Here, reset member 3 is disposed within the second inner cavity 102 and abuts against the tail of valve core 2, enabling reset member 3 to drive valve core 2 from the second position to the first position. When the hydraulic pressure in the second inner cavity 102 is not greater than the first preload of reset member 3, valve core 2 moves to the first position and blocks nozzle 103.

[0042] In this embodiment, a first inner cavity 101 connected to the water supply pipeline and a second inner cavity 102 connected to both the first inner cavity 101 and the nozzle 103 are provided on the nozzle body 1. The valve core 2 is slidably disposed in the second inner cavity 102, having a first position and a second position. When the valve core 2 is in the first position, the valve core 2 blocks the nozzle 103. As the hydraulic pressure in the second inner cavity 102 gradually increases, it can push the valve core 2 to move from the first position to the second position. When the valve core 2 is in the second position, the valve core 2 opens the nozzle 103, and liquid can flow out from the nozzle 103 and spray. The reset member 3 abuts against the second end of the valve core 2. The reset member 3 can drive the valve core 2 to move from the second position to the first position, blocking the nozzle 103. Thus, the nozzle assembly provided in this embodiment can effectively prevent the nozzle 103 from clogging by using the reset member 3 to drive the valve core 2 to block the nozzle 103 when there is no spray or insufficient liquid pressure, thereby improving the spray dust reduction efficiency of the nozzle assembly.

[0043] In some possible embodiments, the valve core 2 includes a plug head 201, a valve stem 202, and a boss 203. When the valve core 2 is in the first position, the plug head 201 is used to plug the nozzle 103. The plug head 201 is connected to the first end of the valve stem 202. The boss 203 is connected to the second end of the valve stem 202, and the side of the boss 203 is slidably connected to the inner wall of the second inner cavity 102.

[0044] It should be noted that the plugging head 201, valve stem 202 and boss 203 are coaxially arranged, and the axis of valve core 2 and the axis of the second inner cavity 102 are on the same straight line; the maximum outer diameter of the plugging head 201 and the outer diameter of the boss 203 are both greater than the outer diameter of the valve stem 202, and the outer diameter of the boss 203 is greater than the maximum outer diameter of the plugging head 201.

[0045] In this embodiment, the valve core 2 is selected to include a sealing head 201, a valve stem 202, and a boss 203. Not only can the sealing head 201 block the nozzle 103 when the valve core 2 moves to the first position, but also, through the sliding connection between the boss 203 and the inner wall of the second inner cavity 102, the boss 203 can slide on the inner wall of the second inner cavity 102 under the hydraulic action of the liquid in the second inner cavity 102, so as to realize the movement of the valve core 2 from the first position to the second position under the hydraulic action of the liquid in the second inner cavity 102.

[0046] In some possible embodiments, the nozzle 103 is a tapered hole, and the nozzle 103 and the second inner cavity 102 are coaxially arranged; the portion of the sealing head 201 used to seal the nozzle 103 is tapered, and the sealing head 201 and the second inner cavity 102 are coaxially arranged.

[0047] Here, the radius of the nozzle 103 on the side closer to the second inner cavity 102 is greater than the radius on the side farther away from the second inner cavity 102.

[0048] In this embodiment, by selecting the nozzle 103 as a conical hole and the portion of the plugging head 201 used to plug the nozzle 103 as conical, and by setting both the nozzle 103 and the plugging head 201 coaxially with the second inner cavity 102, the plugging head 201 can plug the nozzle 103 when the valve core 2 moves to the first position.

[0049] In some possible embodiments, there are at least two first inner cavities 101, and the axial direction of at least two first inner cavities 101 is parallel to the axial direction of the second inner cavity 102; wherein, when the valve core 2 is in the first position, the corresponding connecting hole 104 of each first inner cavity 101 and the second inner cavity 102 is located above the boss 203.

[0050] It should be noted that at least two first inner cavities 101 are arranged with the central axis of the second inner cavity 102 as the center.

[0051] In this embodiment, by providing at least two first inner cavities 101 that communicate with the second inner cavity 102, and ensuring that when the valve core 2 is in the first position, the corresponding communication holes 104 of each first inner cavity 101 and the second inner cavity 102 are located above the boss 203, it is guaranteed that during the movement of the valve core 2 between the first position and the second position, the boss 203 can always maintain a sliding connection with the inner wall of the second inner cavity 102.

[0052] In some possible embodiments, the boss 203 is fitted with a high-pressure water seal 4, which is slidably sealed to the inner wall of the second inner cavity 102.

[0053] Here, a groove is provided on the side of the boss 203, and the high-pressure water seal 4 is installed in the groove to fix the high-pressure water seal 4 on the boss 203.

[0054] In this embodiment, by fitting a high-pressure water seal 4 on the boss 203, a sliding sealing connection can be achieved between the boss 203 and the inner wall of the second inner cavity 102, so as to prevent the liquid in the second inner cavity 102 from flowing to the second end of the valve core 2 through the boss 203, thereby preventing the reset member 3 located near the second end of the valve core 2 from being soaked in liquid.

[0055] In some possible embodiments, the nozzle body 1 is provided with a screw plug 5, and the screw plug 5 is located on the side of the second inner cavity 102 away from the nozzle 103. The screw plug 5, the second inner cavity 102 and the second end of the valve core 2 form a mounting cavity for mounting the reset member 3.

[0056] In this embodiment, by fixing the screw plug 5 to the side of the second inner cavity 102 away from the nozzle 103, the reset member 3 can be installed in the mounting cavity formed by the screw plug 5, the second inner cavity 102 and the second end of the valve core 2, so as to limit the position of the reset member 3.

[0057] In some possible embodiments, a sealing ring 6 is provided on the contact surface between the screw plug 5 and the nozzle body 1.

[0058] In this embodiment, by providing a sealing ring 6 on the contact surface between the screw plug 5 and the nozzle body 1, a seal can be achieved between the screw plug 5 and the second inner cavity 102, thereby preventing gas or liquid from entering the second inner cavity 102 through the gap between the screw plug 5 and the nozzle body 1.

[0059] In some possible embodiments, the reset element 3 is a leaf spring.

[0060] Here, the leaf spring can be made of an elastic material.

[0061] In this embodiment, by selecting a plate spring as the reset member 3, the valve core 2 can be stably reset from the second position to the first position.

[0062] In some possible embodiments, the plate spring includes two arc-shaped spring plates 301, with the open ends of the two arc-shaped spring plates 301 facing away from each other; wherein, the open end of one of the two arc-shaped spring plates 301 is positioned toward the second end of the valve core 2.

[0063] Here, both ends of the arc-shaped spring plate 301 with its open end facing the second end of the valve core 2 abut against the second end of the valve core 2, and both ends of another arc-shaped spring plate 301 arranged opposite to the arc-shaped spring plate 301 abut against the screw plug 5.

[0064] One embodiment of the present invention provides a coal mining machine, which includes a nozzle assembly as described in any of the above embodiments.

[0065] Since the coal mining machine of this embodiment includes any of the nozzle assemblies in the first aspect above, it has the beneficial effects of any of the above embodiments, which will not be repeated here.

[0066] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0067] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0068] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is 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 "beneath" the second feature can mean that the first feature is 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.

[0069] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "exemplary embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A nozzle assembly used in a coal mining machine, characterized in that, include: The nozzle body has a first inner cavity and a second inner cavity that are interconnected. The first inner cavity can also be connected to a water supply pipeline, and the second inner cavity is connected to a nozzle. The valve core is axially adjustable along the second inner cavity and has a first position and a second position; when the valve core is in the first position, the first end of the valve core blocks the nozzle, and when the valve core is in the second position, the first end of the valve core opens the nozzle, and the liquid entering the second inner cavity from the first inner cavity can drive the valve core to move from the first position to the second position; A reset member is disposed in the second inner cavity and abuts against the second end of the valve core. The reset member is used to reset the valve core from the second position to the first position.

2. The nozzle assembly according to claim 1, characterized in that, The valve core includes: A plugging head, used to plug the nozzle when the valve core is in the first position; Valve stem, the plug head is connected to the first end of the valve stem; A boss is connected to the second end of the valve stem, and the side of the boss is slidably connected to the inner wall of the second inner cavity.

3. The nozzle assembly according to claim 2, characterized in that, The nozzle is a conical hole, and the nozzle and the second inner cavity are coaxially arranged; the part of the sealing head used to seal the nozzle is conical, and the sealing head and the second inner cavity are coaxially arranged.

4. The nozzle assembly according to claim 2, characterized in that, The first inner cavity is at least two, and the axial direction of at least two of the first inner cavities is parallel to the axial direction of the second inner cavity; wherein, when the valve core is in the first position, the corresponding connecting hole of each of the first inner cavity and the second inner cavity is located above the boss.

5. The nozzle assembly according to claim 2, characterized in that, The boss is fitted with a high-pressure water seal, which is slidably sealed to the inner wall of the second inner cavity.

6. The nozzle assembly according to claim 1, characterized in that, The nozzle body is provided with a screw plug, and the screw plug is located on the side of the second inner cavity away from the nozzle. The screw plug, the second inner cavity and the second end of the valve core form a mounting cavity for installing the reset member.

7. The nozzle assembly according to claim 6, characterized in that, A sealing ring is provided on the contact surface between the screw plug and the nozzle body.

8. The nozzle assembly according to any one of claims 1 to 7, characterized in that, The reset component is a plate spring.

9. The nozzle assembly according to claim 8, characterized in that, The plate spring includes two arc-shaped spring plates, and the open ends of the two arc-shaped spring plates are arranged opposite to each other; wherein, the open end of one of the two arc-shaped spring plates is arranged facing the second end of the valve core.

10. A coal mining machine, characterized in that, Includes the nozzle assembly as described in any one of claims 1 to 9.

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