A nozzle and dust washing device

Abstract

The present application discloses a nozzle and dust washing device, the nozzle comprises a nozzle body, a first extension, a second extension and an expansion assembly, the nozzle body has an inlet and an outlet, the first extension and the second extension are connected with the nozzle body and located on the side of the outlet, the first extension and the second extension are arranged in the thickness direction of the nozzle body, the expansion assembly is connected with the nozzle body, the expansion assembly comprises a first swing part and a second swing part, the first swing part and the second swing part are arranged in the width direction of the nozzle body, the first swing part, the first extension, the second extension and the second swing part enclose an expansion area, in a first position, the cross-sectional area of the expansion area remains unchanged along the direction from the inlet to the outlet, in a second position, the cross-sectional area of the expansion area remains gradually increased along the direction from the inlet to the outlet. The nozzle of the embodiment of the present application is convenient to operate and has a wide spraying range.

Description

Technical Field

[0001] This invention relates to the field of mine dust removal technology, specifically to a nozzle and a dust removal device. Background Technology

[0002] Coal mines generate large amounts of dust during production at various work sites. The unique properties of coal mine dust determine its significant hazards: on the one hand, dust-polluted work environments seriously endanger workers' health and can cause lung diseases. On the other hand, excessively high dust concentrations pose a potential explosion risk, and suspended coal dust is one of the main causes of coal mine dust explosions.

[0003] In related technologies, high-pressure hoses are generally used for dust washing in mines. However, the high pressure of the hoses results in significant water loss due to direct rebound during dust washing, leading to poor dust washing effect, wasted water resources, and an inability to achieve satisfactory dust washing results. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art. To this end, embodiments of the present invention provide a nozzle that has the advantages of convenient adjustment and a wide spraying range.

[0005] The embodiments of the present invention provide a dust washing device that has the advantage of good dust washing effect.

[0006] The nozzle of this embodiment of the invention includes:

[0007] A nozzle body having an inlet and an outlet in its extending direction, wherein in a plane orthogonal to the extending direction of the nozzle body, the cross-sectional area of ​​the nozzle gradually increases along the direction from the inlet to the outlet, and the dimension of the inlet in the thickness direction of the nozzle body is greater than the dimension of the outlet in the thickness direction of the nozzle body.

[0008] A first extension and a second extension, both of which are connected to the nozzle body and located on the outlet side, are arranged at intervals in the thickness direction of the nozzle body.

[0009] An extension assembly, connected to the nozzle body, includes a first swing portion and a second swing portion. The first and second swing portions are positioned on the outlet side and are spaced apart in the width direction of the nozzle body. The first and second swing portions are movable between a first position and a second position. The first swing portion, the first extension portion, the second extension portion, and the second swing portion form an extension area.

[0010] In the first position, in a plane orthogonal to the extension direction of the nozzle body, the cross-sectional area of ​​the extended region remains unchanged along the direction from the inlet to the outlet;

[0011] In the second position, in a plane orthogonal to the extension direction of the nozzle body, the cross-sectional area of ​​the extended region gradually increases along the direction from the inlet to the outlet.

[0012] The nozzle of this invention can adjust the drainage space on the outlet side by means of the extension component. That is, by changing the position of the first swing part and the second swing part, the first swing part and the second swing part are changed from the first position to the second position, thereby increasing the extension area. As a result, the water flow through the nozzle forms a larger "water barrier" so as to cover more dust-generating areas. It is easy to operate and has a wide spray range.

[0013] In some embodiments of the present invention, the nozzle further includes a waterproof shell connected to the nozzle body, the waterproof shell having a waterproof cavity, and the extension assembly further includes a drive member connected to the first swing portion and the second swing portion and located within the waterproof cavity.

[0014] In some embodiments, the extension component further includes a first connector and a second connector, a first end of the first connector being connected to the drive member, a second end of the first connector being connected to the first swing portion, the first swing portion having a first clearance groove, at least a portion of the second end of the first connector engaging within the first clearance groove, so that the first swing portion can move between the first position and the second position, and at least a portion of the second end of the first connector being movable relative to the first clearance groove.

[0015] The first end of the second connector is connected to the drive member, and the second end of the second connector is connected to the second swing part. The second swing part has a second clearance groove. At least a portion of the second end of the second connector is fitted into the second clearance groove so that the second swing part can move between the first position and the second position. At least a portion of the second end of the second connector is movable relative to the second clearance groove.

[0016] In some embodiments, the driving member includes a driving body and a driving portion, the driving portion cooperating with the driving body, the driving portion being connected to both the first connecting member and the second connecting member, the driving body being movable along a first axial direction and rotatable about the first axial direction, and the driving body having a locked position and a rotating position.

[0017] In the locked position, the drive body is movable along the extension direction of the first axial direction;

[0018] In the rotational position, the driving member is movable along the extension direction of the first axial direction and is rotatable along the first axial direction so as to drive the first swing part and the second swing part to move through the first connecting member and the second connecting member.

[0019] In some embodiments, the extension component further includes a first elastic element, a first end of which is connected to the nozzle body, a second end of which is connected to the drive body, and the extension direction of the first elastic element is consistent with the first axial direction. In the rotational position, the first elastic element is in a compressed state.

[0020] In some embodiments, the extension component further includes a locking member connected to the drive body and movable along an axis orthogonal to the first axis.

[0021] In the locked position, the locking member abuts against at least one of the first connecting member and the second connecting member to restrict movement of the first connecting member and the second connecting member.

[0022] In the rotational position, the drive body moves the locking member so that the locking member disengages from at least one of the first connector and the second connector, thereby enabling the first connector and the second connector to move relative to the drive body.

[0023] In some embodiments, the extension component further includes a second elastic element, one end of which is connected to the nozzle body and the second end of which is connected to the locking element. In the rotational position, the second elastic element is in a compressed state.

[0024] In some embodiments, the extension component further includes a locking groove formed on at least one of the first connector and the second connector. In the locked position, at least a portion of the locking member is placed within the locking groove. There are multiple locking grooves, which are spaced apart along the extension direction of the first connector.

[0025] In some embodiments, the locking groove includes a mating section and an expansion section connected in sequence, at least a portion of the locking member is placed within the mating section, and the cross-sectional area of ​​the expansion section gradually increases in the direction from the mating section to the expansion section, and the edge spacing dimension of the expansion section is zero in two adjacent locking grooves.

[0026] The dust removal device of this invention includes a water tank, a water pump and a nozzle connected in sequence by pipes, wherein the nozzle is the nozzle according to any one of the above embodiments. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the nozzle structure according to an embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional (partial) structural schematic diagram of the nozzle according to an embodiment of the present invention.

[0029] Figure 3 yes Figure 2 An enlarged schematic diagram of A shown in the figure.

[0030] Figure 4 This is a schematic diagram of the nozzle structure according to an embodiment of the present invention.

[0031] Figure 5 yes Figure 4 The diagram shows a three-dimensional cross-sectional view of BB.

[0032] Figure 6 yes Figure 5 An enlarged schematic diagram of C shown in the figure.

[0033] Figure 7 This is a schematic diagram of the locking groove of the nozzle in an embodiment of the present invention.

[0034] Figure label:

[0035] 1. Nozzle body; 11. Inlet; 12. Outlet.

[0036] 21. First extension; 22. Second extension.

[0037] 3. Extension components; 311. First swinging part; 312. Second swinging part; 32. Driving component; 321. Driving body; 322. Driving part; 331. First connecting component; 332. Second connecting component; 341. First elastic component; 342. Second elastic component; 35. Locking component; 351. Inclined platform; 36. Locking groove; 361. Mating section; 362. Expansion section; 371. First clearance groove; 372. Second clearance groove; 38. Expansion area; 39. Annular protrusion.

[0038] 4. Waterproof casing. Detailed Implementation

[0039] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0040] The nozzle of an embodiment of the present invention will now be described with reference to the accompanying drawings.

[0041] like Figures 1-7As shown, the nozzle of this embodiment of the invention includes: a nozzle body 1, a first extension 21, a second extension 22, and an extension component 3.

[0042] The nozzle body 1 has in its extending direction (e.g. Figure 1 The inlet 11 and outlet 12 are located in the front-to-back direction of the nozzle body 1. In a plane orthogonal to the extension direction of the nozzle body 1, the cross-sectional area of ​​the nozzle gradually increases along the direction from the inlet 11 to the outlet 12, and the inlet 11 is located in the thickness direction of the nozzle body 1 (e.g., in the front-to-back direction). Figure 1 The dimension of the nozzle body 1 in the vertical direction is greater than the dimension of the outlet 12 in the thickness direction. The first extension 21 and the second extension 22 are both connected to the nozzle body 1 and located on the side of the outlet 12. The first extension 21 and the second extension 22 are arranged at intervals in the thickness direction of the nozzle body 1.

[0043] Specifically, such as Figures 1-5 As shown, the cross-sectional profile of inlet 11 is circular, and the cross-sectional profile of outlet 12 is rectangular. The radial dimension of inlet 11 is greater than the height dimension of outlet 12, so that after inlet 11 is connected to the drainage pipe, the water flow through the nozzle will form a water curtain. The first extension 21 and the second extension 22 are both connected to the edge of outlet 12.

[0044] The extension assembly 3 is connected to the nozzle body 1. The extension assembly 3 includes a first swing portion 311 and a second swing portion 312. The first swing portion 311 and the second swing portion 312 are located on one side of the outlet 12, and the first swing portion 311 and the second swing portion 312 are in the width direction of the nozzle body 1 (e.g., Figure 1 The first swing portion 311 and the second swing portion 312 are arranged at intervals in the left and right directions. The first swing portion 311, the first extension portion 21, the second extension portion 22 and the second swing portion 312 are movable between the first position and the second position. The first swing portion 311, the first extension portion 21, the second extension portion 22 and the second swing portion 312 form an extension region 38. In the first position, in the plane orthogonal to the extension direction of the nozzle body 1, the cross-sectional area of ​​the extension region 38 remains unchanged in the direction from the inlet 11 to the outlet 12. In the second position, in the plane orthogonal to the extension direction of the nozzle body 1, the cross-sectional area of ​​the extension region 38 gradually increases in the direction from the inlet 11 to the outlet 12.

[0045] Specifically, such as Figures 1-4 As shown, the first swing part 311 is located on the right side of the outlet 12, and the second swing part 312 is located on the left side of the outlet 12. The first swing part 311 and the second swing part 312 are movable between the first position and the second position, including moving and rotating, that is, the first swing part 311 and the second swing part 312 can move in the left and right direction relative to the outlet 12; or, the first swing part 311 and the second swing part 312 swing left and right relative to the outlet 12.

[0046] Preferably, such as Figure 1 As shown, the first swing part 311 and the second swing part 312 are both provided with a rotating shaft, and the nozzle body 1 is provided with a shaft hole that matches the rotating shaft. The first swing part 311 and the second swing part 312 respectively cooperate with the shaft hole through the rotating shaft to realize left and right swing.

[0047] Optionally, a first folding portion is provided between the first swing portion 311 and the first extension portion 21 and the second extension portion 22, and a second folding portion is provided between the second swing portion 312 and the first extension portion 21 and the second extension portion 22. Both the first folding portion and the second folding portion are fan-shaped structures. That is, after the first swing portion 311 and the second swing portion 312 change from the first position to the second position, the first folding portion and the second folding portion are in the open state. When the first swing portion 311 and the second swing portion 312 are in the first position, the first folding portion and the second folding portion are in the folded state.

[0048] It is understandable that when the first swing part 311 and the second swing part 312 are in the second position, the cross-sectional area of ​​the extended region 38 gradually increases in the direction from front to back, thereby increasing the area of ​​the water curtain formed after the water is discharged through the outlet 12, which can cover more dust-generating space.

[0049] In other words, the nozzle of this embodiment of the invention can adjust the drainage space on one side of the outlet 12 by means of the extension component 3. That is, by changing the position of the first swing part 311 and the second swing part 312, the first swing part 311 and the second swing part 312 are changed from the first position to the second position, thereby making the extension area 38 larger. Thus, the water flow through the nozzle forms a larger "water barrier" so as to cover more dusty areas. It is easy to operate and has a wide spraying range.

[0050] In some embodiments, the nozzle of the present invention further includes a waterproof shell 4, which is connected to the nozzle body 1 and has a waterproof cavity. The extension assembly 3 further includes a drive member 32, which is connected to the first swing part 311 and the second swing part 312 and is located inside the waterproof cavity.

[0051] Specifically, such as Figure 1 As shown, the waterproof shell 4 is located on top of the nozzle body 1, and the drive component 32 is located inside the waterproof cavity to prevent the drive component 32 from being affected by water vapor and malfunctioning after long-term use of the nozzle, thereby improving the service life of the nozzle.

[0052] In some embodiments, the extension component 3 further includes a first connector 331 and a second connector 332. A first end of the first connector 331 is connected to a drive member 32, and a second end of the first connector 331 is connected to a first swing portion 311. The first swing portion 311 has a first clearance groove 371. At least a portion of the second end of the first connector 331 fits into the first clearance groove 371 to allow the first swing portion 311 to move between a first position and a second position. At least a portion of the second end of the first connector 331 is movable relative to the first clearance groove 371. A first end of the second connector 332 is connected to the drive member 32, and a second end of the second connector 332 is connected to a second swing portion 312. The second swing portion 312 has a second clearance groove 372, and at least a portion of the second end of the second connector 332 fits into the second clearance groove 372 to allow the second swing portion 312 to move between a first position and a second position. At least a portion of the second end of the second connector 332 is movable relative to the second clearance groove 372.

[0053] Specifically, such as Figure 1 and Figure 2 As shown, the right end of the first connector 331 penetrates the waterproof shell 4, and the first connector 331 is movable relative to the waterproof shell 4. The contact parts between the first connector 331 and the waterproof shell 4 are all sealed connections, that is, a sealing ring can be used to fit the first connector 331 to achieve a seal. Similarly, the left end of the second connector 332 penetrates the waterproof shell 4, and a sealing ring can be used to seal between the second connector 332 and the waterproof shell 4.

[0054] It is understandable that both the first connector 331 and the second connector 332 can move in the left and right directions. Taking the first connector 331 as an example, when the first connector 331 moves from right to left, it drives the first swing part 311 to rotate. Since the right end of the first connector 331 cooperates with the first clearance groove 371 on the first swing part 311, the right end of the first connector 331 slides in the first clearance groove 371, thereby realizing the rotation function of the first swing part 311.

[0055] In some embodiments, the driving member 32 includes a driving body 321 and a driving part 322. The driving part 322 cooperates with the driving body 321 and is connected to both the first connecting member 331 and the second connecting member 332. The driving body 321 is movable along a first axial direction and rotatable about the first axial direction. The driving body 321 has a locked position and a rotating position. In the locked position, the driving body 321 is rotatable along the extending direction of the first axial direction (i.e., Figure 1 The drive member 32 is movable in the vertical direction; in the rotating position, the drive member 32 is movable in the extension direction of the first axis and is rotatable in the first axis so as to drive the first swing part 311 and the second swing part 312 to move through the first connector 331 and the second connector 332.

[0056] Specifically, the drive body 321 penetrates the top wall of the waterproof shell 4 in the vertical direction, and the drive body 321 is rotatable relative to the waterproof shell 4. The extension direction of the center line of the drive body 321 is the first axial direction. In the locked position, the drive part 322 can only move in the vertical direction and cannot rotate; in the rotating position, the drive part 322 can move in both the vertical direction and rotate.

[0057] Preferably, such as Figures 1-6 As shown, the drive unit 322 is a gear, the drive body 321 is a gear shaft, and the left end of the first connector 331 and the right end of the second connector 332 are both racks that mesh with the gear. Therefore, when the drive body 321 rotates in the rotation position, it can drive the first connector 331 and the second connector 332 to move.

[0058] In some embodiments, the extension component 3 further includes a first elastic element 341, the first end of the first elastic element 341 being connected to the nozzle body 1, the second end of the first elastic element 341 being connected to the drive body 321, and the extension direction of the first elastic element 341 being consistent with the first axial direction. In the rotational position, the first elastic element 341 is in a compressed state.

[0059] Specifically, such as Figures 1-6 As shown, the first elastic element 341 is connected between the drive body 321 and the nozzle body 1. In the locked position, pressure is applied to the drive body 322, causing the drive body 321 to move downwards, which is hindered by the first elastic element 341. That is, the drive body 321 can be subjected to an upward elastic force until the drive body 321 moves to the rotation position. After the drive body 321 rotates by the angle, the pressure is released, and the drive body 321 will change from the rotation position to the locked position under the elastic force of the first elastic element 341.

[0060] It should be noted that the first elastic element 341 can be a spring or a part made of other elastic materials, such as rubber.

[0061] In some embodiments, the extension component 3 further includes a locking member 35, which is connected to the drive body 321 and is movable along an orthogonal axis. In the locked position, the locking member 35 abuts against at least one of the first connector 331 and the second connector 332 to restrict the movement of the first connector 331 and the second connector 332. In the rotated position, the drive body 321 drives the locking member 35 to move so that the locking member 35 disengages from at least one of the first connector 331 and the second connector 332, so that the first connector 331 and the second connector 332 can move relative to the drive body 321.

[0062] Specifically, such as Figure 6As shown, the nozzle body 1 also includes an annular protrusion 39. The lower end of the drive body 321 fits into the annular protrusion 39. One end of the locking member 35 adjacent to the drive body 321 is placed in the inner cavity of the annular protrusion 39. The locking member 35 has a ramp 351, which is placed in the inner cavity of the annular protrusion 39, and the ramp surface of the ramp 351 is inclined and arranged upward. When the drive body 321 moves downward, the peripheral wall of the drive body 321 can contact the ramp 351. The downward movement of the drive body 321 can drive the ramp 351 to move closer to the drive body 321, thereby driving the locking member 35 to move towards the drive body 321, so that the locking member 35 disengages from one of the first connecting member 331 or the second connecting member 332, thereby releasing the function of the locking member 35 in restricting one of the first connecting member 331 or the second connecting member 332.

[0063] Preferably, such as Figure 5 and Figure 6 As shown, there are two locking members 35. In the locked position, the two locking members 35 abut against the first connecting member 331 and the second connecting member 332 respectively.

[0064] In some embodiments, the extension component 3 further includes a second elastic member 342, one end of which is connected to the nozzle body 1, and the second end of which is connected to the locking member 35. In the rotational position, the second elastic member 342 is in a compressed state.

[0065] Specifically, such as Figures 1-6 As shown, in the locked position, the locking member 35 is obstructed by the second elastic member 342, causing the locking member 35 to abut against the first connecting member 331 and the second connecting member 332. As the driving body 321 moves from top to bottom, that is, from the locked position to the rotating position, the locking member 35 can overcome the elastic force of the second elastic member 342 and move closer to the driving body 321. Therefore, until the driving body 321 moves to the rotating position, the second elastic member 342 is in a compressed state, and when the driving body 321 moves to the rotating position, the second elastic member 342 is in its maximum compressed state.

[0066] Understandably, when the drive body 321 is in the locked position, the locking member 35 abuts against the first connecting member 331 and the second connecting member 332 (i.e., the movement of the first connecting member 331 and the second connecting member 332 is restricted by the friction between the locking member 35 and the first connecting member 331 and the second connecting member 332). Since the drive part 322 is engaged with both the first connecting member 331 and the second connecting member 332, the rotation of the drive part 322 is also restricted. When the drive body 321 is in the rotating position, the locking member 35 disengages from the first connecting member 331 and the second connecting member 332. Therefore, rotating the drive body 321 can drive the first connecting member 331 and the second connecting member 332 to move via the drive part 322, thereby realizing the rotation of the first swing part 311 and the second swing part 312.

[0067] Preferably, the extension component 3 further includes a locking groove 36, which is formed on at least one of the first connector 331 and the second connector 332. In the locked position, at least a portion of the locking member 35 is placed in the locking groove 36. There are multiple locking grooves 36, which are spaced apart along the extension direction of the first connector 331.

[0068] Specifically, such as Figure 6 and Figure 7 As shown, the locking groove 36 extends in the front-back direction (i.e., in the same direction as the extension of the locking member 35). In the locked position, the end of the locking member 35 away from the drive body 321 is placed in the locking groove 36. That is, the locking member 35 is connected to the first connector 331 and the second connector 332 by plugging in, so as to further restrict the movement of the first connector 331 and the second connector 332 in the locked position.

[0069] In some embodiments, the locking groove 36 includes a mating section 361 and an expansion section 362 connected in sequence. At least a portion of the locking member 35 is placed in the mating section 361. In the direction from the mating section 361 to the expansion section 362, the cross-sectional area of ​​the expansion section 362 gradually increases. In two adjacent locking grooves 36, the edge spacing dimension of the expansion section 362 is zero.

[0070] Understandably, the gap between the edges of the expansion sections 362 in two adjacent locking grooves 36 is zero, which allows the locking member 35 to move more precisely toward the mating section 361 when it contacts the wall of either expansion section 362, so that the locking member 35 can be inserted into the mating section 361 more quickly, thereby restricting the movement of the first connecting member 331 and the second connecting member 332.

[0071] The dust washing device of this invention includes a water tank (not shown in the figure), a water pump (not shown in the figure), and a nozzle connected in sequence by pipes, wherein the nozzle is a nozzle according to any of the above embodiments.

[0072] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0073] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between them; 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, 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," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0076] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. 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.

[0077] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A nozzle, characterized in that, include: A nozzle body having an inlet and an outlet in its extending direction, wherein in a plane orthogonal to the extending direction of the nozzle body, the cross-sectional area of ​​the nozzle gradually increases along the direction from the inlet to the outlet, and the dimension of the inlet in the thickness direction of the nozzle body is greater than the dimension of the outlet in the thickness direction of the nozzle body. A first extension and a second extension, both of which are connected to the nozzle body and located on the outlet side, are arranged at intervals in the thickness direction of the nozzle body. An extension assembly, connected to the nozzle body, includes a first swing portion and a second swing portion. The first and second swing portions are positioned on the outlet side and are spaced apart in the width direction of the nozzle body. The first and second swing portions are movable between a first position and a second position. The first swing portion, the first extension portion, the second extension portion, and the second swing portion form an extension area. In the first position, in a plane orthogonal to the extension direction of the nozzle body, the cross-sectional area of ​​the extended region remains unchanged along the direction from the inlet to the outlet; In the second position, in a plane orthogonal to the extension direction of the nozzle body, the cross-sectional area of ​​the extended region gradually increases along the direction from the inlet to the outlet.

2. The nozzle according to claim 1, characterized in that, It also includes a waterproof shell connected to the nozzle body, the waterproof shell having a waterproof cavity, and the extension assembly further includes a drive member connected to the first swing part and the second swing part and located within the waterproof cavity.

3. The nozzle according to claim 2, characterized in that, The extension component further includes a first connector and a second connector. A first end of the first connector is connected to the drive member, and a second end of the first connector is connected to the first swing part. The first swing part has a first clearance groove. At least a portion of the second end of the first connector fits into the first clearance groove so that the first swing part can move between the first position and the second position. At least a portion of the second end of the first connector is movable relative to the first clearance groove. The first end of the second connector is connected to the drive member, and the second end of the second connector is connected to the second swing part. The second swing part has a second clearance groove. At least a portion of the second end of the second connector is fitted into the second clearance groove so that the second swing part can move between the first position and the second position. At least a portion of the second end of the second connector is movable relative to the second clearance groove.

4. The nozzle according to claim 3, characterized in that, The driving component includes a driving body and a driving part. The driving part cooperates with the driving body and is connected to both the first connecting member and the second connecting member. The driving body is movable along a first axial direction and rotatable about the first axial direction. The driving body has a locked position and a rotating position. In the locked position, the drive body is movable along the extension direction of the first axial direction; In the rotational position, the driving member is movable along the extension direction of the first axial direction and is rotatable along the first axial direction so as to drive the first swing part and the second swing part to move through the first connecting member and the second connecting member.

5. The nozzle according to claim 4, characterized in that, The extension component further includes a first elastic element, a first end of which is connected to the nozzle body, a second end of which is connected to the drive body, and the extension direction of the first elastic element is consistent with the first axial direction. In the rotation position, the first elastic element is in a compressed state.

6. The nozzle according to claim 5, characterized in that, The extension component further includes a locking element connected to the drive body and movable along an axis orthogonal to the first axis. In the locked position, the locking member abuts against at least one of the first connecting member and the second connecting member to restrict movement of the first connecting member and the second connecting member. In the rotational position, the drive body moves the locking member so that the locking member disengages from at least one of the first connector and the second connector, thereby enabling the first connector and the second connector to move relative to the drive body.

7. The nozzle according to claim 6, characterized in that, The extension component also includes a second elastic element, one end of which is connected to the nozzle body and the second end of which is connected to the locking element. In the rotational position, the second elastic element is in a compressed state.

8. The nozzle according to claim 7, characterized in that, The extension component further includes a locking groove, which is formed on at least one of the first connector and the second connector. In the locked position, at least a portion of the locking member is placed in the locking groove. There are multiple locking grooves, which are spaced apart along the extension direction of the first connector.

9. The nozzle according to claim 8, characterized in that, The locking groove includes a mating section and an expansion section connected in sequence. At least a portion of the locking member is placed in the mating section. In the direction from the mating section to the expansion section, the cross-sectional area of ​​the expansion section gradually increases. In two adjacent locking grooves, the edge spacing of the expansion section is zero.

10. A dust washing device, characterized in that, It includes a water tank, a water pump, and a nozzle connected in sequence by pipes, wherein the nozzle is the nozzle according to any one of claims 1-9.

Images