Automatic spray dust-settling device for mine equipment

CN122644213BActive Publication Date: 2026-09-25TAIZHOU LIANSHENG METALLURGICAL MASCH CO LTD
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Patent Information

Application Number
CN202611151296.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-07-31
Publication Date
2026-09-25
Estimated Expiration
2046-07-31

AI Technical Summary

Technical Problem

[0005]本发明的目的在于:为了解决现有的矿山设备用喷雾降尘装置通常采用单个喷头或者多个固定方向喷头进行喷雾,喷雾范围较为集中,难以对设备周围区域形成连续覆盖的降尘空间,当粉尘从不同方向扩散时,容易出现部分区域无法被水雾覆盖的问题,而提出的一种矿山设备用自动喷雾降尘装置

Benefits of technology

1、本发明中,通过设置环形喷雾装置,当需要对矿山设备周围进行降尘时,水流经输水管进入增压箱内,增压箱对水流进行增压后,通过多个连接管分别输送至对应水枪内,并由多个喷头沿环形方向同步喷出水雾,使多个方向喷出的水雾在设备外围形成环形覆盖区域,进而形成一个环形的雨雾罩,使粉尘在扩散过程中受到水雾阻挡和吸附,避免灰尘进入该区域,解决现有技术中单个方向喷雾导致覆盖范围不足、降尘效果不佳的问题。

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Abstract

The application discloses a kind of automatic spray dust-settling device for mine equipment, belong to spray dust-settling technical field, including box and top cover, annular spray device, adaptive device, auxiliary device and closure device are equipped in the box;The annular spray device includes moving ring, hose, water pipe, booster tank, support rod, mounting bracket, connecting pipe, water gun and spray head;The adaptive device is used to drive moving ring to move along vertical direction, to drive annular spray device whole lifting.This application, by multiple connecting pipes respectively transported to corresponding water gun, and by multiple spray heads along annular direction synchronous spray water mist, make multiple direction spray water mist form annular coverage area in the periphery of equipment, and then form a ring-shaped rain mist cover, so that dust is blocked and adsorbed by water mist during diffusion, avoid dust into the area, solve the problem of insufficient coverage range and poor dust-settling effect caused by single direction spray in prior art.
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Description

Technical Field

[0001] This invention belongs to the field of spray dust suppression technology, and particularly relates to an automatic spray dust suppression device for mining equipment. Background Technology

[0002] Mining equipment generates a large amount of dust during operations such as mining, crushing, and conveying. This dust not only reduces air quality in the work area but also affects the health of workers. Therefore, existing technologies typically employ spray dust suppression devices to treat dusty areas by spraying water mist. The water mist combines with the dust, causing it to settle and thus achieving the purpose of dust suppression.

[0003] Existing dust suppression spray devices for mining equipment typically use a single nozzle or multiple nozzles with fixed directions for spraying. The spray range is relatively concentrated, making it difficult to form a continuous dust suppression space covering the area around the equipment. When dust spreads from different directions, some areas may not be covered by the water mist, resulting in a reduction in dust suppression effectiveness. At the same time, the nozzle angles in existing spray devices are usually fixed, making it difficult to adjust the spray coverage area according to the equipment height and dust range, thus reducing the device's adaptability to different operating environments.

[0004] Based on this, the present invention designs an automatic spray dust suppression device for mining equipment to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to address the problem that existing dust suppression spray devices for mining equipment typically use a single nozzle or multiple nozzles with fixed directions, resulting in a concentrated spray range that makes it difficult to create a continuous dust suppression space around the equipment. Furthermore, when dust spreads from different directions, some areas may not be covered by the water mist. Therefore, this invention proposes an automatic dust suppression spray device for mining equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An automatic spray dust suppression device for mining equipment includes a housing and a top cover. The housing contains an annular spray device, an adapter, an auxiliary device, and a sealing device. The annular spray device includes a moving ring, a hose, a water supply pipe, a pressurization box, a support rod, a mounting bracket, a connecting pipe, a water gun, and a nozzle. The adapter is used to drive the moving ring to move vertically, thereby raising and lowering the annular spray device as a whole. The auxiliary device is used to adjust the spray posture of the nozzle in conjunction with the water gun. The sealing device is used to seal the guide groove inside the housing when the annular spray device descends.

[0007] As a further description of the above technical solution: A water supply pipe is installed below the booster box, and a flexible hose is installed below the water supply pipe. Several connecting pipes are installed above the booster box, with a water gun installed at one end of each connecting pipe and a nozzle installed at the other end of each water gun. The mounting bracket is installed above the booster box, and the support rod is fixedly connected between the moving ring and the booster box.

[0008] As a further description of the above technical solution: The adapter includes a nut, a threaded rod, a cross plate, a first wedge, and a second wedge. The nut is connected through the housing, the threaded rod is threadedly connected to the nut, and the cross plate is mounted on one end of the threaded rod via a bearing.

[0009] As a further description of the above technical solution: The first wedge is symmetrically installed on one side of the horizontal plate, and the second wedge is respectively attached to the top of the first wedge. The two second wedges together support the moving ring, and the moving ring drives the support rod and the pressure box to rise and fall synchronously.

[0010] As a further description of the above technical solution: The adapter also includes a mounting slot, a crossbar, a collar, a locking block, a swivel, a rotating plate, a locking rod, and a rotating ball. Several mounting slots are formed in the mounting frame, the crossbar is installed in the mounting slot, and the collar is rotatably connected to the outside of the crossbar and fixedly connected to the top of the water gun.

[0011] As a further description of the above technical solution: The locking block is fixedly connected to the inner wall of the housing, the rotating seat is rotatably connected to the locking block, the rotating plate is installed above the rotating seat, the locking rod is fixedly connected to the rotating plate, the rotating ball is rotatably connected to the locking rod, and the water gun is slidably connected to the rotating ball to adjust the spray angle of the nozzle when the annular spray device is raised and lowered.

[0012] As a further description of the above technical solution: The auxiliary device includes a spherical connector, a swing tube, a return spring, and a compression plate. The spherical connector is rotatably connected inside the water gun, and the swing tube is installed inside the spherical connector.

[0013] As a further description of the above technical solution: The reset spring is sleeved on the outside of the swing tube. One end of the reset spring is fixedly connected to the inside of the water gun, and the other end is fixedly connected to the inside of the nozzle. Several extrusion plates are evenly distributed on the outer wall of the box.

[0014] As a further description of the above technical solution: The enclosure includes a baffle, a rope, a chute, a sliding sleeve, a fixed pulley, a pull plate, and a guide groove. The baffle is slidably connected to the chute. The rope is installed above the baffle and wrapped around the outside of the fixed pulley. The sliding sleeve is slidably connected to the outside of the rope. The pull plate is fixedly connected to the top of the mounting frame.

[0015] As a further description of the above technical solution: Several guide grooves are evenly distributed inside the box. The number of extrusion plates is half the number of guide grooves. The extrusion plates and guide grooves are arranged alternately. During the lifting and lowering of the annular spray device, the water gun corresponding to the extrusion plate is squeezed and swings, which drives the corresponding nozzle to change the spray direction so that the spray trajectory of the corresponding nozzle intersects with the spray trajectory of the unextruded nozzle.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. In this invention, by setting up a ring-shaped spray device, when it is necessary to reduce dust around mining equipment, water flows into the pressurization box through the water supply pipe. After the pressurization box pressurizes the water flow, it is delivered to the corresponding water guns through multiple connecting pipes. Multiple nozzles simultaneously spray water mist in a ring direction, so that the water mist sprayed from multiple directions forms a ring-shaped coverage area around the equipment, thereby forming a ring-shaped rain and mist cover. This prevents dust from entering the area by being blocked and adsorbed by the water mist during the diffusion process, thus solving the problem of insufficient coverage and poor dust reduction effect caused by single-direction spraying in the prior art.

[0017] 2. In this invention, by setting up an adapter, when it is necessary to adjust the coverage of the rain and fog cover, rotating the nut drives the threaded rod to move, causing the threaded rod to push the horizontal plate to move. The horizontal plate drives the first wedge block to move, and by utilizing the inclined surface cooperation between the first and second wedge blocks, the second wedge block drives the moving ring to move in the vertical direction. The moving ring drives the pressurization box to rise and fall as a whole through the support rod, and at the same time drives the water gun to rotate along the corresponding structure, so that the spray angle of the nozzle is adjusted with the height, thereby changing the coverage of the rain and fog cover and improving the adaptability of the device to different dust areas.

[0018] 3. In this invention, by setting an auxiliary device, when the nozzle is at a large spray angle and forms a large area of ​​rain and mist cover, during the movement of the annular spray device, some water guns come into contact with the corresponding squeezing plate, causing the water guns to be squeezed and swing, and driving the nozzle to change the spray direction. This causes the spray trajectory generated by the corresponding nozzle to intersect with the spray trajectory generated by the unsqueezed nozzle, thereby increasing the degree of overlap of water mist in space, making the formed rain and mist cover more uniform, and improving the dust capture effect.

[0019] 4. In this invention, by setting up a sealing device, when the device does not need to perform spraying work, the annular spraying device descends and resets, and the mounting frame synchronously drives the pull plate to move. The pull plate pulls the rope to move, and after the rope changes the direction of movement through the fixed pulley, it drives the baffle to move along the slide groove, so that the baffle seals the guide groove inside the box, reducing the entry of external dust into the guide groove, avoiding dust accumulation from affecting the operation of the moving structure, and improving the stability of the device during long-term use. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of an automatic spray dust suppression device for mining equipment proposed in this invention; Figure 2 This is a structural schematic diagram of the cross-sectional view of the housing of an automatic spray dust suppression device for mining equipment proposed in this invention; Figure 3 This is a schematic diagram of the structure of an annular spray device for an automatic dust suppression spray system for mining equipment proposed in this invention; Figure 4 This is a schematic diagram of the structure of an automatic spray dust suppression device water gun for mining equipment proposed in this invention; Figure 5 This invention proposes an automatic spray dust suppression device for mining equipment. Figure 4 Enlarged structural diagram of part A in the middle; Figure 6 This is a schematic diagram of the structure of an automatic spray dust suppression device nozzle for mining equipment proposed in this invention; Figure 7 This invention proposes an automatic spray dust suppression device for mining equipment. Figure 6 Enlarged structural diagram of section B; Figure 8 This is a schematic diagram of the structure of an automatic spray dust suppression device enclosure for mining equipment proposed in this invention; Figure 9 This invention proposes an automatic spray dust suppression device for mining equipment. Figure 8 An enlarged structural diagram of section C.

[0021] Legend: 1. Housing; 2. Top cover; 3. Annular spray device; 301. Moving ring; 302. Hose; 303. Water supply pipe; 304. Booster box; 305. Support rod; 306. Mounting bracket; 307. Connecting pipe; 308. Water gun; 309. Nozzle; 4. Adapter device; 401. Nut; 402. Threaded rod; 403. Horizontal plate; 404. First wedge; 405. Second wedge; 406. Mounting groove; 407. 408. Crossbar; 409. Collar; 410. Locking block; 411. Rotating seat; 412. Rotating plate; 413. Locking rod; 414. Rotating ball; 5. Auxiliary device; 501. Spherical joint; 502. Swing tube; 503. Return spring; 504. Pressing plate; 6. Sealing device; 601. Baffle; 602. Rope; 603. Slide groove; 604. Sliding sleeve; 605. Fixed pulley; 606. Pull plate; 607. Guide groove. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figures 1-9 This invention provides a technical solution comprising a housing 1 and a top cover 2. The housing 1 contains an annular spray device 3, an adapter 4, an auxiliary device 5, and a sealing device 6. The annular spray device 3 includes a moving ring 301, a hose 302, a water supply pipe 303, a booster box 304, a support rod 305, a mounting bracket 306, a connecting pipe 307, a water gun 308, and a nozzle 309. The adapter 4 drives the moving ring 301 to move vertically, thereby raising and lowering the annular spray device 3 as a whole. The auxiliary device 5 works with the water gun 308 to adjust the spray posture of the nozzle 309. The sealing device 6 seals the guide groove 607 inside the housing 1 when the annular spray device 3 descends.

[0024] Specifically, such as Figures 1-4 As shown, a water supply pipe 303 is installed below the pressure box 304, a flexible hose 302 is installed below the water supply pipe 303, several connecting pipes 307 are installed above the pressure box 304, a water gun 308 is installed at one end of the connecting pipe 307, a nozzle 309 is installed at one end of the water gun 308, a mounting bracket 306 is installed above the pressure box 304, and a support rod 305 is fixedly connected between the moving ring 301 and the pressure box 304.

[0025] Specifically, such as Figures 3-5As shown, the adapter device 4 includes a nut 401, a threaded rod 402, a horizontal plate 403, a first wedge 404, and a second wedge 405. The nut 401 is inserted into the housing 1. The threaded rod 402 is threadedly connected to the nut 401. The horizontal plate 403 is mounted on one end of the threaded rod 402 via a bearing. The first wedge 404 is symmetrically mounted on one side of the horizontal plate 403. The second wedges 405 are respectively attached to the top of the first wedges 404. The two second wedges 405 together support the moving ring 301. The moving ring 301 drives the support rod 305 and the pressure box 304 to rise and fall synchronously. The adapter device 4 also includes an installation groove 406, a horizontal rod 407, a collar 408, a locking block 409, and a rotating seat 41. 0. A rotating plate 411, a locking rod 412, and a rotating ball 413 are provided. Several mounting slots 406 are provided in the mounting frame 306. A crossbar 407 is installed in the mounting slot 406. A collar 408 is rotatably connected to the outside of the crossbar 407 and fixedly connected to the top of the water gun 308. A locking block 409 is fixedly connected to the inner wall of the housing 1. A rotating seat 410 is rotatably connected to the locking block 409. A rotating plate 411 is installed above the rotating seat 410. A locking rod 412 is fixedly connected to the rotating plate 411. A rotating ball 413 is rotatably connected to the locking rod 412. The water gun 308 is slidably connected to the rotating ball 413 to adjust the spray angle of the nozzle 309 when the annular spray device 3 is raised and lowered.

[0026] Specifically, the moving ring 301 and the second wedge 405 cooperate with each other. When the first wedge 404 is pushed horizontally by the horizontal plate 403, the inclined surface of the first wedge 404 presses the second wedge 405, causing the second wedge 405 to move vertically, thereby pushing the moving ring 301 to move up and down. Through this inclined surface transmission method, the horizontal adjustment movement of the threaded rod 402 is converted into the lifting movement of the annular spray device 3, so that the installation height of the nozzle 309 can be adjusted according to the actual dust suppression range. Specifically, such as Figures 6-7 As shown, the auxiliary device 5 includes a ball joint 501, a swing tube 502, a return spring 503, and a squeezing plate 504. The ball joint 501 is rotatably connected to the water gun 308. The swing tube 502 is installed inside the ball joint 501. The return spring 503 is sleeved on the outside of the swing tube 502. One end of the return spring 503 is fixedly connected to the water gun 308, and the other end is fixedly connected to the nozzle 309. Several squeezing plates 504 are evenly distributed on the outer wall of the housing 1.

[0027] Specifically, the water gun 308 and the rotating ball 413 cooperate with each other. The water gun 308 is inserted into the rotating ball 413. When the water gun 308 is raised or lowered by the moving ring 301 or squeezed by the squeezing plate 504, the water gun 308 can drive the rotating ball 413 to rotate within the locking rod 412, so that the water gun 308 can obtain multi-directional swing space, avoid the nozzle 309 from spraying only in a fixed direction, and improve the flexibility of spray direction adjustment. The swing tube 502 and the return spring 503 work together. When the swing tube 502 is subjected to the squeezing force and deflects, the swing tube 502 drives the return spring 503 to produce elastic deformation. The elastic force of the return spring 503 can apply a reverse force to the swing tube 502, so that the swing tube 502 automatically returns to the initial position after losing the external squeezing force, thereby ensuring that the nozzle 309 can repeatedly adjust the angle.

[0028] Specifically, such as Figures 8-9 As shown, the sealing device 6 includes a baffle 601, a rope 602, a chute 603, a sliding sleeve 604, a fixed pulley 605, a pull plate 606, and a guide groove 607. The baffle 601 is slidably connected to the chute 603. The rope 602 is installed above the baffle 601 and wrapped around the outside of the fixed pulley 605. The sliding sleeve 604 is slidably connected to the outside of the rope 602. The pull plate 606 is fixedly connected to the top of the mounting frame 306. Several guide grooves 607 are evenly distributed in the housing 1. The number of extrusion plates 504 is half the number of guide grooves 607, and the extrusion plates 504 and guide grooves 607 are arranged alternately to form an interlaced arrangement. During the lifting and lowering of the annular spray device 3, the water gun 308 corresponding to the extrusion plate 504 is squeezed and swings, which drives the corresponding nozzle 309 to change the spray direction so that the spray trajectory of the corresponding nozzle 309 intersects with the spray trajectory of the unextruded nozzle 309.

[0029] Specifically, the guide groove 607 and the extrusion plate 504 cooperate with each other. The guide groove 607 provides guidance for the lifting and lowering movement of the annular spray device 3. At the same time, by separating the extrusion plate 504 and the guide groove 607, some of the water guns 308 can pass through the position of the extrusion plate 504 and swing during the movement, so as to adjust the spray direction of different nozzles 309. The rope 602 and the fixed pulley 605 work together. The rope 602 is wrapped around the outside of the fixed pulley 605. The fixed pulley 605 changes the direction of movement of the rope 602, so that the lifting and lowering movement of the mounting frame 306 can be transmitted to the baffle 601. The baffle 601 can be moved synchronously without an additional power source, thus improving the structural linkage.

[0030] Working principle and usage: When the mining equipment generates a large amount of dust, the dust is first suppressed by the annular spray device 3. The external water source enters the pressurization box 304 through the water supply pipe 303 and the hose 302. After being pressurized by the pressurization box 304, the water flows through multiple connecting pipes 307 into the corresponding water guns 308, and is sprayed outward by multiple nozzles 309 arranged in a ring. This causes the water mist from multiple directions to form an annular rain and mist cover around the mining equipment. The annular cover blocks and suppresses dust in the area around the equipment, preventing the dust from spreading outward. When it is necessary to adjust the coverage area of ​​the rain and fog hood according to the size of the mining equipment or the dust range, the height of the annular spray device 3 is adjusted by the adapter device 4, and the nut 401 is rotated to drive the threaded rod 402 to move, so that the threaded rod 402 pushes the horizontal plate 403 and the first wedge 404 to move. Under the action of the inclined surfaces of the first wedge 404 and the second wedge 405, the second wedge 405 pushes the moving ring 301 to move in the vertical direction. The moving ring 301 drives the pressurization box 304 to rise and fall as a whole through the support rod 305, and at the same time drives the water gun 308 to rotate relative to the mounting frame 306, so that the spray angle of the nozzle 309 changes synchronously. When the annular spray device 3 is raised and the nozzle 309 is at a large spray angle, the auxiliary device 5 adjusts some of the nozzles 309 in a coordinated manner. During the movement, some of the water guns 308 come into contact with the corresponding squeezing plate 504, causing the water guns 308 to swing after being squeezed, and driving the corresponding nozzles 309 to change the spray direction. This causes the spray trajectory generated by the corresponding nozzles 309 to intersect with the spray trajectory generated by the unsqueezed nozzles 309, so that the water mist sprayed from multiple directions forms a more uniform overlapping area. When the mining equipment stops working or when dust suppression spraying is not required, the annular spray device 3 descends and resets. The mounting frame 306 synchronously drives the pull plate 606 to move. The pull plate 606 pulls the rope 602 to move. After the rope 602 changes its direction of movement through the fixed pulley 605, it drives the baffle 601 to move upward along the slide groove 603, so that the baffle 601 closes the guide groove 607 in the box 1.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic spray dust suppression device for mining equipment, comprising a housing (1) and a top cover (2), characterized in that: The housing (1) is equipped with an annular spray device (3), an adapter (4), an auxiliary device (5), and a sealing device (6); the annular spray device (3) includes a moving ring (301), a hose (302), a water supply pipe (303), a booster box (304), a support rod (305), a mounting bracket (306), a connecting pipe (307), a water gun (308), and a nozzle (309); the adapter (4) is used to drive the moving ring (301) to move vertically, so as to drive the annular spray device (3) to rise and fall as a whole; the auxiliary device (5) is used to cooperate with the water gun (308) to adjust the spray posture of the nozzle (309); the sealing device (6) is used to seal the guide groove (607) inside the housing (1) when the annular spray device (3) descends; The auxiliary device (5) includes a ball joint (501), a swing tube (502), a return spring (503) and a pressing plate (504). The ball joint (501) is rotatably connected to the water gun (308), and the swing tube (502) is installed inside the ball joint (501). The reset spring (503) is sleeved on the outside of the swing tube (502). One end of the reset spring (503) is fixedly connected to the water gun (308), and the other end is fixedly connected to the nozzle (309). Several extrusion plates (504) are evenly distributed on the outer wall of the box (1). The enclosing device (6) includes a baffle (601), a rope (602), a chute (603), a sleeve (604), a fixed pulley (605), a pull plate (606), and a guide groove (607). The baffle (601) is slidably connected to the chute (603). The rope (602) is installed above the baffle (601) and wrapped around the outside of the fixed pulley (605). The sleeve (604) is slidably connected to the outside of the rope (602). The pull plate (606) is fixedly connected to the top of the mounting frame (306). Several guide grooves (607) are evenly distributed in the box (1). The number of extrusion plates (504) is half the number of guide grooves (607). The extrusion plates (504) and guide grooves (607) are arranged in an interlaced manner. During the lifting and lowering process of the annular spray device (3), the water gun (308) corresponding to the extrusion plate (504) is squeezed and swings, which drives the corresponding nozzle (309) to change the spray direction so that the spray trajectory of the corresponding nozzle (309) intersects with the spray trajectory of the unextruded nozzle (309).

2. The automatic spray dust suppression device for mining equipment according to claim 1, characterized in that, A water supply pipe (303) is installed below the booster box (304), a flexible hose (302) is installed below the water supply pipe (303), a number of connecting pipes (307) are installed above the booster box (304), a water gun (308) is installed at one end of the connecting pipe (307), a nozzle (309) is installed at one end of the water gun (308), the mounting bracket (306) is installed above the booster box (304), and the support rod (305) is fixedly connected between the moving ring (301) and the booster box (304).

3. The automatic spray dust suppression device for mining equipment according to claim 1, characterized in that, The adapter (4) includes a nut (401), a threaded rod (402), a horizontal plate (403), a first wedge (404), and a second wedge (405). The nut (401) is connected through the box (1). The threaded rod (402) is threadedly connected to the nut (401). The horizontal plate (403) is mounted on one end of the threaded rod (402) by a bearing.

4. An automatic spray dust suppression device for mining equipment according to claim 3, characterized in that, The first wedge (404) is symmetrically installed on one side of the horizontal plate (403), and the second wedge (405) is attached to the top of the first wedge (404). The two second wedges (405) together support the moving ring (301), and the moving ring (301) drives the support rod (305) and the pressurization box (304) to rise and fall synchronously.

5. An automatic spray dust suppression device for mining equipment according to claim 1, characterized in that, The adapter (4) further includes a mounting groove (406), a crossbar (407), a collar (408), a locking block (409), a swivel seat (410), a rotating plate (411), a locking rod (412), and a rotating ball (413). Several mounting grooves (406) are opened in the mounting frame (306). The crossbar (407) is installed in the mounting groove (406). The collar (408) is rotatably connected to the outside of the crossbar (407) and fixedly connected to the top of the water gun (308).

6. An automatic spray dust suppression device for mining equipment according to claim 5, characterized in that, The locking block (409) is fixedly connected to the inner wall of the box (1), the rotating seat (410) is rotatably connected to the locking block (409), the rotating plate (411) is installed above the rotating seat (410), the locking rod (412) is fixedly connected to the rotating plate (411), the rotating ball (413) is rotatably connected to the locking rod (412), and the water gun (308) is slidably connected to the rotating ball (413) to adjust the spray angle of the nozzle (309) when the annular spray device (3) is raised and lowered.

Citation Information

Patent Citations

  • Dust falling device for civil engineering construction site

    CN120242632A

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