A belt transfer point spray mechanism and a continuous loading coal excavator based on the mechanism

Abstract

The present invention relates to a belt transfer point spray mechanism, which is used for spray dust reduction at the belt transfer point formed by a primary belt and a secondary belt; the spray mechanism includes a top support airbag arranged under the belt surface of the secondary belt feed end and a ring spray assembly arranged on the belt surface of the primary belt discharge end; the ring spray assembly includes a plurality of spray nozzles evenly arranged in a ring shape and facing the feed end of the secondary belt and an air ring assembly radially linked with the plurality of spray nozzles, the air ring assembly is connected to the top support airbag through an air pipe adapted thereto; the present invention also relates to a continuous loading coal excavator, including a belt transfer point spray mechanism as described above. The spray mechanism of the present invention can significantly reduce the dust concentration at the belt transfer point, improve the working environment, reduce the harm of dust to the health of workers, and is also conducive to ensuring production safety and avoiding safety hazards such as explosions caused by dust accumulation.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining spray dust reduction, and in particular relates to a belt transfer point spray mechanism and a continuous charging coal excavator based on the mechanism. Background Art

[0002] Coal diggers (backhoe loaders) are heavy machinery designed for underground mining such as coal mines. They integrate digging and loading functions and are mainly used for tunneling in coal tunnels and semi-coal tunnels. They can also be used for tunnel mucking. If there is gangue or hard coal, they can be crushed before tunneling. The equipment is easy to disassemble and assemble, has a large slope, and has few wearing parts. It is an excellent alternative to traditional tunneling machines.

[0003] When an existing coal excavator is operating in a coal mine tunnel, it generally transfers the excavated coal or coal gangue and other materials to the second conveyor belt hung at its tail through the first conveyor belt, and then unloads them into the rear mine car through the second conveyor belt; however, a large amount of dust is easily generated when dropping materials at the transfer point where the first conveyor belt and the second conveyor belt intersect, affecting the working environment and personnel health. Therefore, it is necessary to install a spray dust reduction mechanism at the transfer point. The mechanism converts water into water mist through a high-pressure water pump and a spray nozzle, and sprays it into the air to combine with dust particles to make them wet and settle, which can effectively reduce the dust concentration in the air, improve the working environment, and protect the health of workers and production safety.

[0004] However, the traditional transfer point spray dust reduction mechanism generally sets up multiple spray nozzles distributed in a straight line on a conveyor belt for spray dust reduction. Not only is the coverage range not wide enough, but the spray angle is mostly not adjustable. It is impossible to automatically adjust the spray dust reduction range according to the actual amount of material falling at the transfer point (the amount of material falling is proportional to the dust). The intelligent spray dust reduction equipment on the market is expensive, with high use and maintenance costs, which increases the cost of coal mining and cannot be used on a large scale. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a belt transfer point spray mechanism and a continuous charging coal excavator based on the mechanism. The specific technical scheme is as follows:

[0006] The present invention provides a belt transfer point spray mechanism, which is used for spraying and dust reduction at a belt transfer point formed by a primary conveyor belt and a secondary conveyor belt;

[0007] The spray mechanism comprises a top-supporting airbag arranged under the belt surface of the feeding end of the second conveyor belt and a ring-spraying assembly arranged on the belt surface of the discharging end of the first conveyor belt; the ring-spraying assembly comprises a plurality of spray nozzles evenly arranged in a ring shape and facing the feeding end of the second conveyor belt, and an air ring assembly radially linked with the plurality of the spray nozzles, the air ring assembly and the top-supporting airbag are connected through an air pipe adapted thereto;

[0008] The supporting airbag can be divided into a natural state and a pressurized state. When in the natural state, the multiple spray nozzles are circumferentially arranged parallel to each other; when in the pressurized state, part of the high-pressure gas in the supporting airbag enters the air ring assembly through the air pipe to force the air ring assembly to expand radially inward, and simultaneously drive the multiple spray nozzles to expand outward in a trumpet shape, and the expansion amplitude is proportional to the pressure on the supporting airbag.

[0009] As a preferred technical solution of the present invention, the annular spray assembly includes support plates vertically arranged on both sides of the belt surface of the discharge end of the conveyor belt, a ring support plate with a circular ring structure is obliquely arranged between the two support plates, and a plurality of U-shaped frames are installed on the inner wall of the ring support plate at equal intervals in the circumferential direction, and a suspension rod with an obtuse-angled structure is arranged in the U-shaped frame, and the straight portion of the suspension rod is connected to the corresponding U-shaped frame pivot through a rotating shaft vertically symmetrically connected to the side surface of its outer end, and the spray nozzle is detachably installed in parallel on the bottom surface of its outer end; the outer ends of the inclined portions of the plurality of suspension rods are radially linked with the air ring assembly.

[0010] As a preferred technical solution of the present invention, the air ring assembly includes a ring support groove of a circular ring structure, and the outer peripheral wall of the ring support groove and the outer peripheral wall of the ring support plate are coaxially detachably suspended and connected through a plurality of L-shaped rods adapted thereto; a telescopic airbag is sleeved and matched in the ring support groove, and the telescopic airbag is connected to the top support airbag through the air pipe; an H-shaped connecting rod is bridged between the telescopic airbag and the plurality of suspension rods, one end of the H-shaped connecting rod is pivotally connected to a hinge seat one correspondingly arranged on the outer end of the inclined portion of the suspension rod, and the other end is pivotally connected to a hinge seat two correspondingly arranged on the inner wall of the telescopic portion of the telescopic airbag;

[0011] The telescopic airbag can be divided into a contracted state and an expanded state. When in the contracted state, the telescopic portion of the telescopic airbag shrinks to the edge of the annular support groove, and the straight portions of the plurality of suspension rods are circumferentially arranged in parallel with each other; when in the expanded state, the telescopic portion of the telescopic airbag expands radially inward, and synchronously presses the inclined portion of the suspension rod through the H-shaped connecting rod, causing the straight portions of the plurality of suspension rods to expand outward in a trumpet shape around the rotating shaft.

[0012] As a preferred technical solution of the present invention, the top support airbag is a hollow rectangular structure, the bottom of one end face of which is connected to the air pipe via a valve, the bottom face of which is integrally connected to a rubber pad, the bottom face of which is fitted with a mounting plate, the rubber pad and the mounting plate are fixed at their four corners by symmetrically arranged locking bolts; the mounting plate is detachably fixed to the frame of the secondary transport belt.

[0013] As a preferred technical solution of the present invention, a plurality of annular grooves are longitudinally formed at equal intervals on the outer facade of the top support airbag.

[0014] As a preferred technical solution of the present invention, the plurality of spray nozzles are supplied with water through a water pipe assembly sleeved on the outer peripheral wall of the ring support plate;

[0015] The water pipe assembly includes a hard ring tube axially sleeved on the inner end of the outer peripheral wall of the ring support plate, and the inner side surface of the hard ring tube is circumferentially evenly spaced with a plurality of hoses respectively connected to the water inlets at the tail ends of the corresponding spray nozzles, and the hoses pass through rectangular holes opened on the straight parts of the corresponding suspension rods; the bottom of the hard ring tube is connected with a water supply pipe connected to an external high-pressure water pump.

[0016] As a preferred technical solution of the present invention, a clamp assembly is provided on the vertical portion of the L-shaped rod, and the clamp assembly includes an ear plate 1 vertically arranged at the bottom end of the vertical portion of the L-shaped rod, and a rotating shaft 2 is vertically rotatably connected between the two ear plates 1, and a C-shaped clamping ring that is axially fixedly sleeved in the middle of the rotating shaft 2 and is clamped with the hard ring tube, and torsion springs are axially symmetrically sleeved on both ends of the rotating shaft 2, and one end of the torsion spring is connected to the C-shaped clamping ring, and the other end thereof is connected to the corresponding ear plate 1.

[0017] As a preferred technical solution of the present invention, the support plates are rotatably connected to the corresponding support plates through support shafts radially symmetrically connected to the outer peripheral walls of the support plates, and the outer ends of the support shafts are connected to the rotating components arranged on the corresponding support plates;

[0018] The fixing assembly includes a block seat vertically fixed to the corresponding outer facade of the support plate, the outer end gap of the support shaft passes through the middle of the block seat, and the end face is axially and vertically fixed with a positioning column, and the outer peripheral wall of the positioning column is circumferentially and evenly spaced with a plurality of slots; the top surface of the block seat is vertically and symmetrically connected with an ear plate 2 along its center line, and a pressing arm with a spoon-shaped structure is suspended between the two ear plates 2, and a semicircular structure The protrusion is integrally connected to the bending part of the bottom surface of the pressing arm is pivotally connected to the two ear plates 2; a card block is vertically connected to the bottom surface of the front end of the pressing arm, and the card block can be radially engaged with the corresponding card slot rotated to the bottom thereof; the bottom surface of the rear end of the pressing arm and the top surface of the block seat are elastically connected by a top spring matched thereto.

[0019] As a preferred technical solution of the present invention, the outer end surface of the positioning column is axially integrated with a rotating cap, the outer diameter of the rotating cap is larger than the outer diameter of the positioning column, and the outer peripheral wall of the rotating cap is provided with anti-slip patterns.

[0020] The present invention also provides a continuous charging coal shearing machine, which comprises a belt transfer point spraying mechanism as described above;

[0021] The first transport belt is arranged obliquely upward in the middle of the coal mining machine, and the second transport belt is hung at its tail, and the tail of the second transport belt is rollingly supported by supporting legs with walking wheels which are longitudinally symmetrically arranged; a mine car group for transporting coal can be allowed to pass between the two supporting legs.

[0022] The beneficial effects of the present invention are:

[0023] The annular spray assembly provided in the spray mechanism of the present invention enables multiple spray nozzles to be evenly and annularly distributed at the discharge end of a conveyor belt. Compared with the conventional linearly distributed spray nozzles, the spray range is wider and more uniform, and the dust area generated at the transfer point can be more fully covered, thereby improving the dust reduction efficiency.

[0024] The spray mechanism utilizes the change in the pressure state of the top support airbag arranged under the belt surface at the feed end of the secondary conveyor belt, and realizes the automatic expansion and contraction of the spray nozzle through the linkage of the air pipe and the air ring assembly; when the amount of falling material at the transfer point increases, the amount of dust generated also increases accordingly, at this time, the top support airbag is impacted by the falling material and enters a pressure state, and part of the high-pressure gas inside it is pressed into the air ring assembly, causing it to expand radially and drive the spray nozzle to expand outward, forming a wider spray coverage range, thereby more effectively capturing and settling dust; conversely, when the amount of falling material decreases, the spray range automatically shrinks, realizing accurate and efficient spray dust reduction; at the same time, the cushioning effect of the top support airbag itself can reduce the impact force on the belt surface at the feed end of the secondary conveyor belt during falling material, thereby extending its service life;

[0025] The spray mechanism can significantly reduce the dust concentration at the belt transfer point, improve the working environment, reduce the harm of dust to workers' health, and also help ensure production safety and avoid safety hazards such as explosions caused by dust accumulation;

[0026] The spray mechanism achieves intelligent adjustment through reasonable mechanical structure and pneumatic transmission principle, without the need for complex electronic control systems and expensive sensors. Therefore, the manufacturing and maintenance costs are relatively low, making it suitable for promotion and application in large-scale operating environments such as coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The overall structural schematic diagram of the present invention is shown;

[0028] Figure 2 The schematic diagram of the structure of the spray mechanism in the present invention is shown;

[0029] Figure 3 A schematic diagram of the structure of the top support airbag in the present invention is shown;

[0030] Figure 4 The schematic diagram of the structure of the ring spray assembly in the present invention is shown;

[0031] Figure 5 The schematic diagram of the structure of the ring support plate and the water pipe assembly during assembly in the present invention is shown;

[0032] Figure 6 The schematic diagram of the structure of the suspension rod in the present invention is shown;

[0033] Figure 7 The schematic diagram of the structure of the ring support plate and the suspension rod when assembled in the present invention is shown;

[0034] Figure 8 The schematic diagram of the structure of the ring support plate and the gas ring assembly during assembly in the present invention is shown;

[0035] Fig. 9 Shows Figure 8 A magnified view of the structure of the middle A part;

[0036] Fig.10 Shows Figure 8 A magnified view of the structure of the middle B area;

[0037] Fig.11 A partial structural schematic diagram of the assembly of the fixing assembly and the support plate in the present invention is shown;

[0038] Fig.12 Shows Fig.11 A magnified view of the structure of the middle C part;

[0039] Fig.13 Another structural schematic diagram of the spray mechanism of the present invention is shown.

[0040] As shown in the figure: 1. Coal excavator; 11. First conveyor belt; 2. Second conveyor belt; 21. Outrigger; 3. Spray mechanism; 31. Top support airbag; 311. Valve; 312. Rubber pad; 313. Mounting plate; 314. Locking bolt; 315. Annular groove; 32. Air pipe; 33. Ring spray assembly; 331. Support plate; 332. Ring support plate; 3321. Support shaft; 3322. U-shaped frame; 333. Suspension rod; 3331. Rotating shaft 1; 3332. Rectangular hole; 3333. Hinge seat 1; 3334. H-shaped connecting rod; 3335. Hinge seat 2; 334. Spray nozzle; 33 5. Air ring assembly; 3351. Ring support groove; 3352. Telescopic airbag; 336. L-shaped rod; 3361. Ear plate one; 3362. Rotating shaft two; 3363. C-shaped clamp ring; 3364. Torsion spring; 337. Water pipe assembly; 3371. Hard ring pipe; 3372. Hose; 3373. Water supply pipe; 338. Fixing assembly; 3381. Block seat; 3382. Positioning column; 33821. Clamping groove; 3383. Rotating cap; 3384. Pressing arm; 33841. Protrusion; 33842. Block; 3385. Ear plate two; 3386. Top spring; 4. Mine car assembly. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0042] Embodiment 1

[0043] In order to solve the technical problems in the background technology, a belt transfer point spray mechanism is provided as follows:

[0044] Combination Figure 1 , Figure 2 as well as Fig.13 As shown, a belt transfer point spray mechanism, the spray mechanism 3 is used for spraying dust reduction at the belt transfer point formed by the first transport belt 11 and the second transport belt 2;

[0045] The spray mechanism 3 includes a supporting airbag 31 arranged under the feeding end of the second conveyor belt 2 and an annular spray assembly 33 arranged on the discharging end of the first conveyor belt 11; the annular spray assembly 33 includes a plurality of spray nozzles 334 evenly arranged in an annular shape and facing the feeding end of the second conveyor belt 2, and an air ring assembly 335 radially linked with the plurality of spray nozzles 334, and the air ring assembly 335 is connected to the supporting airbag 31 through an air pipe 32 adapted thereto;

[0046] The supporting airbag 31 can be divided into a natural state and a pressurized state. When in the natural state, the multiple spray nozzles 334 are circumferentially arranged in parallel with each other; when in the pressurized state, part of the high-pressure gas in the supporting airbag 31 enters the air ring assembly 335 through the air pipe 32 to force the air ring assembly 335 to expand radially inward, and simultaneously drive the multiple spray nozzles 334 to expand outward in a trumpet shape, and the expansion amplitude is proportional to the pressure on the supporting airbag 31.

[0047] By adopting the above technical solution, the annular spray assembly 33 provided in the spray mechanism enables multiple spray nozzles 334 to be evenly and annularly distributed at the discharge end of a conveyor belt 11. Compared with the traditional linearly distributed spray nozzles 334, the spray range is wider and more uniform, and the dust area generated at the transfer point can be more comprehensively covered, thereby improving the dust reduction efficiency.

[0048] The spray mechanism utilizes the change in the pressure state of the top support airbag 31 arranged under the feed end belt surface of the secondary transport belt 2, and realizes the automatic expansion and contraction of the spray nozzle 334 through the linkage effect of the air pipe 32 and the air ring component 335; when the amount of material falling at the transfer point increases, the amount of dust generated also increases accordingly, at this time, the top support airbag 31 is impacted by the falling material and enters a pressure state (the impact force of the falling material is proportional to the degree of pressure), and part of the high-pressure gas inside it is pressed into the air ring component 335, causing it to expand radially and drive the spray nozzle 334 to expand outward, forming a wider spray coverage range, thereby more effectively capturing and settling dust; conversely, when the amount of material falling decreases, the spray range is automatically reduced, achieving accurate and efficient spray dust reduction; at the same time, the top support airbag 31 itself has a shock-absorbing effect, which can reduce the impact force on the feed end belt surface of the secondary transport belt 2 during falling material, thereby extending its service life;

[0049] The spray mechanism can significantly reduce the dust concentration at the belt transfer point, improve the working environment, reduce the harm of dust to workers' health, and also help ensure production safety and avoid safety hazards such as explosions caused by dust accumulation;

[0050] The spray mechanism achieves intelligent adjustment through reasonable mechanical structure and pneumatic transmission principle, without the need for complex electronic control systems and expensive sensors. Therefore, the manufacturing and maintenance costs are relatively low, making it suitable for promotion and application in large-scale operating environments such as coal mines.

[0051] Embodiment 2

[0052] Combination Figure 2~Figure 8 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0053] In this embodiment, if Figure 4~Figure 7 As shown, the annular spray assembly 33 includes support plates 331 vertically arranged on both sides of the discharge end belt surface of the conveyor belt 11, and a circular ring support plate 332 with a circular ring structure is inclined between the two support plates 331. A plurality of U-shaped frames 3322 are installed on the inner wall of the annular support plate 332 at equal intervals in the circumferential direction, and a suspension rod 333 with an obtuse structure is arranged in the U-shaped frame 3322. The straight portion of the suspension rod 333 is pivotally connected to the corresponding U-shaped frame 3322 through a rotating shaft 3331 vertically symmetrically connected to the side surface of its outer end, and the spray nozzle 334 is detachably installed in parallel on the bottom surface of its outer end; the outer ends of the inclined portions of the plurality of suspension rods 333 are radially linked with the air ring assembly 335.

[0054] By adopting the above technical solution, the ring spray assembly 33 is provided with a stable support structure through the vertically opposite support plate 331 and the inclined ring support plate 332; the U-shaped frame 3322 on the inner wall of the ring support plate 332 provides a stable installation foundation for the suspension rod 333, and the suspension rod 333 enables each spray nozzle 334 to spray water mist at almost the same angle and distance toward the feed end of the second conveyor belt 2. This layout ensures the uniformity of spray coverage and improves the dust reduction effect; the suspension rod 333 is designed as an obtuse-angle structure, which can make the spray nozzle 334 more sensitive to expand outward with the rotating shaft 1 3331 as the axis during the inward radial expansion of the air ring assembly 335;

[0055] The spray nozzle 334 is detachably mounted on the bottom surface of the outer end of the suspension rod 333. This design facilitates quick replacement of the spray nozzle 334 when it is damaged or needs to be replaced, thereby reducing maintenance costs and time.

[0056] like Figure 8 As shown, the air ring assembly 335 includes a ring support groove 3351 of an annular structure, and the outer peripheral wall of the ring support groove 3351 is coaxially detachably suspended and connected with the outer peripheral wall of the ring support plate 332 through a plurality of L-shaped rods 336 adapted thereto; a telescopic airbag 3352 is sleeved and matched in the ring support groove 3351, and the telescopic airbag 3352 is connected to the top support airbag 31 through the air pipe 32; an H-shaped connecting rod 3334 is respectively bridged between the telescopic airbag 3352 and the plurality of suspension rods 333, one end of the H-shaped connecting rod 3334 is pivotally connected to a hinge seat 1 3333 correspondingly arranged on the outer end of the inclined portion of the suspension rod 333, and the other end thereof is pivotally connected to a hinge seat 2 3335 correspondingly arranged on the inner wall of the telescopic portion of the telescopic airbag 3352;

[0057] The telescopic airbag 3352 can be divided into a contracted state and an expanded state. When in the contracted state, the telescopic portion of the telescopic airbag 3352 shrinks to the edge of the annular support groove 3351, and the straight portions of the plurality of suspension rods 333 are circumferentially arranged in parallel with each other; when in the expanded state, the telescopic portion of the telescopic airbag 3352 expands radially inward, and synchronously presses the inclined portion of the suspension rod 333 through the H-shaped connecting rod 3334, causing the straight portions of the plurality of suspension rods 333 to expand outward in a trumpet shape around the rotating shaft 3331.

[0058] By adopting the above technical solution, the expansion and contraction of the telescopic airbag 3352 in the air ring assembly 335 realizes intelligent adjustment of the spray range of the spray nozzle 334; when the amount of material falling at the transfer point increases and the dust concentration rises, the supporting airbag 31 is pressurized to press part of its high-pressure gas into the telescopic airbag 3352, so that the telescopic airbag 3352 expands (under a natural state, the high-pressure gas in the supporting airbag 31 will not cause the expansion of the telescopic airbag 3352). During the expansion process, the telescopic airbag 3352 presses the inclined part of the suspension rod 333 through the H-shaped connecting rod 3334, so that the suspension rod 333 expands outward around the rotating shaft 3331, thereby driving the spray nozzle 334 to form a wider spray range, effectively covering and settling more dust particles;

[0059] The air ring assembly 335 adopts a ring support groove 3351 with a circular ring structure as a supporting base, and is suspended and connected to the ring support plate 332 through an L-shaped rod 336. The structure is compact and stable. At the same time, the telescopic airbag 3352, H-shaped connecting rod 3334 and other components are designed to be detachably connected, which is convenient for replacement or maintenance when necessary, reducing maintenance costs and time.

[0060] like Figure 2 and Figure 3 As shown, the top support airbag 31 is a hollow rectangular structure, and the bottom of one end face thereof is connected to the air pipe 32 via a valve 311, and the bottom face thereof is integrally connected with a rubber pad 312, and the bottom face of the rubber pad 312 is fitted with a mounting plate 313, and the rubber pad 312 and the mounting plate 313 are fixedly connected at their four corners by symmetrically arranged locking bolts 314; the mounting plate 313 is detachably fixed to the frame of the second transport belt 2.

[0061] By adopting the above technical solution, the top support airbag 31 adopts a hollow rectangular parallelepiped structure design, which is not only easy to install and fix, but also provides a stable and reliable support force for the feeding end belt surface of the second transport belt 2; its bottom surface is tightly fitted with the mounting plate 313 through the rubber pad 312, and is fixed by the locking bolt 314, ensuring the stability and reliability of the top support airbag 31 during the working process. This design enables the top support airbag 31 to withstand greater pressure and impact force, ensuring the long-term stable operation of the spray dust reduction mechanism;

[0062] The mounting plate 313 of the top support airbag 31 and the frame of the secondary transport belt 2 are detachably fixed to facilitate installation, removal or replacement when necessary, thereby reducing maintenance costs and time and improving the availability and economy of the equipment.

[0063] like Figure 3 As shown, a plurality of annular grooves 315 are longitudinally and evenly spaced on the outer surface of the supporting airbag 31 .

[0064] By adopting the above technical solution, the annular groove 315 can disperse the pressure on the supporting airbag 31 to a certain extent, making the pressure distribution more uniform, which helps to reduce the risk of rupture or damage of the supporting airbag 31 due to excessive local pressure and improve the service life of the entire spray dust reduction mechanism.

[0065] Embodiment 3

[0066] Combination Figure 5 , Figure 7 and Fig.10 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0067] In this embodiment, if Figure 5 and Figure 7 As shown, the plurality of spray nozzles 334 are supplied with water through a water pipe assembly 337 sleeved on the outer peripheral wall of the ring support plate 332;

[0068] The water pipe assembly 337 includes a hard ring tube 3371 axially sleeved on the inner end of the outer peripheral wall of the annular support plate 332, and the inner side surface of the hard ring tube 3371 is circumferentially evenly spaced with a plurality of hoses 3372 respectively connected to the water inlets at the tail ends of the corresponding spray nozzles 334, and the hoses 3372 pass through a rectangular hole 3332 opened on the straight portion corresponding to the suspension rod 333; the bottom of the hard ring tube 3371 is connected with a water supply pipe 3373 connected to an external high-pressure water pump.

[0069] By adopting the above technical solution, the water pipe assembly 337 is provided with a combination of a hard ring pipe 3371 and a soft pipe 3372. The hard ring pipe 3371 is used as the main water supply pipeline to ensure the stability and pressure of the water flow, while the soft pipe 3372 flexibly distributes the water flow to each spray nozzle 334. This design not only ensures the efficiency of water supply, but also realizes the uniform distribution of water flow.

[0070] The hose 3372 passes through the rectangular hole 3332 opened on the straight part of the suspension rod 333. This design allows the hose 3372 to be flexibly retracted and extended as the suspension rod 333 moves (the design length of the hose 3372 is redundant) and will not be restricted or damaged by the movement of the suspension rod 333.

[0071] The water pipe assembly 337 has a compact overall structure and is tightly integrated with the ring support plate 332, reducing the requirement for installation space. The bottom of the hard ring pipe 3371 is connected to a water supply pipe 3373 connected to an external high-pressure water pump. This design simplifies the complexity of the water supply system and enables the entire spray dust reduction mechanism to operate more efficiently.

[0072] like Fig.10As shown, a clamp assembly is provided on the vertical portion of the L-shaped rod 336, and the clamp assembly includes an ear plate 3361 vertically oppositely arranged at the bottom end of the vertical portion of the L-shaped rod 336, and a rotating shaft 3362 is vertically rotatably connected between the two ear plates 3361, and a C-shaped clamping ring 3363 that is clamped with the hard ring tube 3371 is axially fixedly sleeved in the middle part of the rotating shaft 3362, and torsion springs 3364 are axially symmetrically sleeved on both ends of the rotating shaft 3362, and one end of the torsion spring 3364 is connected to the C-shaped clamping ring 3363, and the other end thereof is connected to the corresponding ear plate 3361.

[0073] By adopting the above-mentioned technical scheme, the design of the C-shaped clamp 3363 in the clamp assembly allows it to be quickly clamped on the hard ring tube 3371 without the need for additional fasteners or tools. This design simplifies the installation process and improves work efficiency; the coordinated use of the second rotating shaft 3362 and the torsion spring 3364 not only realizes the flexible rotation of the C-shaped clamp 3363, but also ensures its stability in the clamped state; the elastic force of the torsion spring 3364 enables the C-shaped clamp 3363 to fit tightly on the hard ring tube 3371, effectively preventing it from falling off due to vibration or external force.

[0074] Embodiment 4

[0075] Combination Figure 5 , Figure 11~Figure 13 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0076] In this embodiment, if Figure 5 , Figure 11~Figure 13 As shown, the support plates 332 are rotatably connected to the corresponding support plates 331 through support shafts 3321 radially symmetrically connected to the outer peripheral wall of the support plates 332, and the outer ends of the support shafts 3321 are connected to the screw-on components 338 disposed on the corresponding support plates 331;

[0077] The screwing assembly 338 includes a block seat 3381 vertically fixed to the outer facade of the corresponding support plate 331, the outer end gap of the support shaft 3321 passes through the middle of the block seat 3381, and the end face is axially and vertically fixed with a positioning column 3382, and the outer peripheral wall of the positioning column 3382 is circumferentially and evenly spaced with a plurality of slots 33821; the top surface of the block seat 3381 is vertically and symmetrically connected to the second ear plate 3385 along the center line, and a pressing arm 338 of a spoon-shaped structure is suspended between the two second ear plates 3385 4. A semicircular raised portion 33841 is integrally connected to the bending portion of the bottom surface of the pressing arm 3384, and the raised portion 33841 is pivotally connected to the two ear plates 3385; a clamping block 33842 is vertically connected to the bottom surface of the front end of the pressing arm 3384, and the clamping block 33842 can be radially engaged with the corresponding clamping groove 33821 rotated to the bottom thereof; the bottom surface of the rear end of the pressing arm 3384 and the top surface of the block seat 3381 are elastically connected via a top spring 3386 matched thereto.

[0078] By adopting the above technical solution, the support shaft 3321 is matched with the rotating assembly 338, and the inclination angle of the ring support plate 332 can be adjusted to a certain extent to better improve the spray dust reduction effect at the transfer point;

[0079] The multiple card grooves 33821 on the outer peripheral wall of the positioning column 3382 in the set screw assembly 338 cooperate with the card block 33842 at the front end of the pressing arm 3384, allowing the user to manually operate the pressing arm 3384 to accurately adjust the inclination angle of the ring support plate 332 (and the spray nozzle 334). This design allows the spray angle to be flexibly adjusted according to the actual falling amount and dust distribution to achieve the best dust reduction effect;

[0080] The setting of the top spring 3386 enables the pressing arm 3384 to maintain a certain tension when no external force is applied, thereby ensuring a stable connection between the clamping block 33842 and the clamping groove 33821. This locking mechanism effectively prevents the ring support plate 332 from accidentally rotating during operation, thereby ensuring the stability and reliability of the spray position.

[0081] The spoon-shaped pressing arm 3384 design allows the user to adjust the spray angle with a simple pressing action. This design is not only easy to operate but also improves work efficiency. The pivot connection between the protrusion 33841 and the ear plate 2 3385 allows the pressing arm 3384 to rotate flexibly while maintaining the stability of the structure.

[0082] like Fig.11 As shown, the outer end surface of the positioning column 3382 is axially integrated with a rotating cap 3383, the outer diameter of the rotating cap 3383 is larger than the outer diameter of the positioning column 3382, and the outer peripheral wall of the rotating cap 3383 is provided with anti-slip textures.

[0083] By adopting the above technical solution, the rotating cap 3383 provided can facilitate the user to rotate the positioning column 3382, thereby adjusting the inclination angle of the ring support plate 332 (and the spray nozzle 334); the outer diameter of the rotating cap 3383 is larger than the outer diameter of the positioning column 3382, which is convenient for the user to grasp; the anti-slip texture provided on the outer peripheral wall of the rotating cap 3383 can increase the friction between the user's hand and the rotating cap, improve the safety of operation, and ensure that the user can stably and accurately adjust the spray angle.

[0084] Embodiment 5

[0085] Combination Figure 1 As shown, based on the above embodiment, this embodiment further provides the following contents:

[0086] In this embodiment, a continuous charging coal shearing machine 1 includes a belt transfer point spray mechanism as described above;

[0087] The first transport belt 11 is arranged obliquely upward in the middle of the coal mining machine 1, and the second transport belt 2 is hung at the tail thereof, and the tail of the second transport belt 2 is rollingly supported by a support leg 21 with walking wheels which is longitudinally symmetrically arranged; a mine car group 4 for transporting coal can be allowed to pass between the two support legs 21.

[0088] By adopting the above technical solution, the first conveyor belt 11 arranged upwardly and tilted in the middle of the coal mining machine 1 can continuously convey coal, coal gangue and other materials to the second conveyor belt 2 connected to the tail, and then unload them into the rear mine car group 4 by the second conveyor belt 2. This continuous loading design improves production efficiency and reduces manual intervention and downtime; the second conveyor belt 2 is supported by the supporting legs 21 with running wheels, and the mine car group 4 can pass between the two supporting legs 21. This design enables the mine car group 4 to easily approach the second conveyor belt 2 for continuous coal loading operations, further improving production efficiency;

[0089] The coal mining machine 1 is equipped with a spray mechanism 3 at the intersection of the first conveyor belt 11 and the second conveyor belt 2. The spray mechanism 3 converts water into water mist through a high-pressure water pump and a spray nozzle 334, and sprays it into the air to combine with dust particles to wet and settle them. This design effectively reduces the dust concentration in the air, significantly improves the working environment in the coal mine tunnel, and protects the health of workers.

[0090] The working principle and use process of the present invention:

[0091] When the present invention is used, first, when the coal mining machine 1 starts to work, the top support airbag 31 on the frame of the second conveyor belt 2 is in a natural state, and the spray nozzles 334 of the ring spray assembly 33 are parallel to each other in the circumferential direction and are not unfolded; as the material is transported from the first conveyor belt 11 to the second conveyor belt 2, the top support airbag 31 is pressurized, and part of the high-pressure gas is pressed into the telescopic airbag 3352 in the air ring assembly 335 through the air pipe 32 to expand it;

[0092] When the telescopic airbag 3352 expands, the H-shaped connecting rod 3334 pushes the inclined portion of the suspension rod 333, so that the straight portion of the suspension rod 333 expands outward in a trumpet shape around the rotating shaft 1 3331, and simultaneously drives the spray nozzle 334 to expand outward to form a wider spray range; the expansion range of the spray nozzle 334 is proportional to the pressure on the supporting airbag 31, so that the spray range is automatically adjusted according to the actual situation of material transportation;

[0093] At the same time, the external high-pressure water pump supplies water to the spray nozzle 334 through the water supply pipe 3373, the hard ring pipe 3371 and the hose 3372 to achieve spray dust reduction; the design of the water pipe assembly 337 ensures that the water flows smoothly, and the design of the hose 3372 facilitates the movement of the spray nozzle 334 as the suspension rod 333 is unfolded;

[0094] When the inclination angle of the annular spray assembly 33 needs to be adjusted, the rotatable cap 3383 can drive the positioning column 3382 to rotate, and the angle positioning and adjustment can be achieved through the cooperation of the card slot 33821 and the card block 33842; the design of the screw-on assembly 338 makes the inclination angle adjustment of the annular spray assembly 33 convenient and quick, and the positioning is accurate.

[0095] In addition, the clamp assembly ensures the stability of the water pipe assembly 337 through the clamping cooperation between the C-type clamp ring 3363 and the hard ring tube 3371. At the same time, the design of the torsion spring 3364 enables the C-type clamp ring 3363 to automatically reset after being loosened, which is convenient for disassembly and installation.

[0096] The entire spray mechanism 3 automatically adjusts the expansion amplitude and spray range of the spray nozzle 334 by changing the pressure state of the supporting airbag 31, thereby achieving effective dust reduction at the belt transfer point. At the same time, the structural design is reasonable, the operation is simple, and the work efficiency and dust reduction effect are improved.

[0097] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A belt transfer point spray mechanism, characterized in that: The spray mechanism (3) is used for spraying dust reduction at a belt transfer point formed by a first transport belt (11) and a second transport belt (2); The spray mechanism (3) comprises a supporting airbag (31) arranged under the feeding end belt surface of the secondary conveyor belt (2) and an annular spray assembly (33) arranged on the discharging end belt surface of the primary conveyor belt (11); the annular spray assembly (33) comprises a plurality of spray nozzles (334) uniformly arranged in an annular shape and facing the feeding end of the secondary conveyor belt (2) and an air ring assembly (335) radially linked to the plurality of spray nozzles (334); the air ring assembly (335) is connected to the supporting airbag (31) via an air pipe (32) adapted thereto; The supporting airbag (31) is divided into a natural state and a pressurized state. When in the natural state, the plurality of spray nozzles (334) are arranged parallel to each other in the circumferential direction. When in the pressurized state, part of the high-pressure gas in the supporting airbag (31) enters the air ring assembly (335) through the air pipe (32) to force the air ring assembly (335) to expand radially inward, and simultaneously drive the plurality of spray nozzles (334) to expand outward in a trumpet shape, and the expansion amplitude is proportional to the pressure on the supporting airbag (31).

2. A belt transfer point spray mechanism according to claim 1, characterized in that: The annular spray assembly (33) comprises support plates (331) vertically arranged on both sides of the discharge end belt surface of the conveyor belt (11), a circular ring support plate (332) is obliquely arranged between the two support plates (331), a plurality of U-shaped frames (3322) are circumferentially and evenly spaced on the inner wall of the annular support plate (332), a suspension rod (333) with an obtuse structure is arranged in the U-shaped frame (3322), the straight portion of the suspension rod (333) is pivotally connected to the corresponding U-shaped frame (3322) through a rotating shaft (3331) vertically and symmetrically connected to the side surface of its outer end, and the spray nozzle (334) is detachably installed in parallel on the bottom surface of its outer end; the outer ends of the inclined portions of the plurality of suspension rods (333) are radially linked to the air ring assembly (335).

3. A belt transfer point spray mechanism according to claim 2, characterized in that: The air ring assembly (335) comprises a ring support groove (3351) of a circular ring structure, wherein the outer peripheral wall of the ring support groove (3351) and the outer peripheral wall of the ring support plate (332) are coaxially detachably suspended and connected via a plurality of L-shaped rods (336) adapted thereto; a telescopic airbag (3352) is sleeved and fitted in the ring support groove (3351), and the telescopic airbag (3352) is connected to the top support airbag (31) via the air pipe (32); an H-shaped connecting rod (3334) is respectively bridged between the telescopic airbag (3352) and the plurality of suspension rods (333), one end of the H-shaped connecting rod (3334) being pivotally connected to a hinge seat 1 (3333) correspondingly arranged on the outer end of the inclined portion of the suspension rod (333), and the other end thereof being pivotally connected to a hinge seat 2 (3335) correspondingly arranged on the inner wall of the telescopic portion of the telescopic airbag (3352); The telescopic airbag (3352) can be divided into a contracted state and an expanded state. When in the contracted state, the telescopic portion of the telescopic airbag (3352) shrinks to the edge of the annular support groove (3351), and the straight portions of the plurality of suspension rods (333) are circumferentially arranged in parallel with each other; when in the expanded state, the telescopic portion of the telescopic airbag (3352) expands radially inward, and synchronously presses the inclined portion of the suspension rod (333) through the H-shaped connecting rod (3334), causing the straight portions of the plurality of suspension rods (333) to expand outward in a trumpet shape around the rotating shaft (3331).

4. A belt transfer point spray mechanism according to claim 3, characterized in that: The supporting airbag (31) is a hollow rectangular parallelepiped structure, the bottom of one end surface of which is connected to the air pipe (32) via an air valve (311), and the bottom surface of which is integrally connected to a rubber pad (312), the bottom surface of which is in contact with a mounting plate (313), and the four corners of the rubber pad (312) and the mounting plate (313) are fixedly connected by symmetrically arranged locking bolts (314); the mounting plate (313) is detachably fixedly connected to the frame of the secondary conveyor belt (2).

5. A belt transfer point spray mechanism according to claim 4, characterized in that: The outer facade of the supporting airbag (31) is provided with a plurality of annular grooves (315) at equal intervals in the longitudinal direction.

6. A belt transfer point spray mechanism according to claim 3, characterized in that: The plurality of spray nozzles (334) are supplied with water through a water pipe assembly (337) sleeved on the outer peripheral wall of the ring support plate (332); The water pipe assembly (337) comprises a hard ring tube (3371) axially sleeved on the inner end of the outer peripheral wall of the ring support plate (332); the inner side surface of the hard ring tube (3371) is provided with a plurality of hoses (3372) connected to the water inlets at the tail ends of the corresponding spray nozzles (334) at equal intervals in the circumferential direction, and the hoses (3372) pass through a rectangular hole (3332) provided on the straight portion of the corresponding suspension rod (333); the bottom of the hard ring tube (3371) is provided with a water supply pipe (3373) connected to an external high-pressure water pump.

7. A belt transfer point spray mechanism according to claim 6, characterized in that: A clamp assembly is arranged on the vertical portion of the L-shaped rod (336), and the clamp assembly includes an ear plate (3361) vertically arranged at the bottom end of the vertical portion of the L-shaped rod (336), and a rotating shaft (3362) is vertically rotatably connected between the two ear plates (3361), and a C-shaped clamping ring (3363) that is engaged with the hard ring tube (3371) is axially fixedly sleeved on the middle part of the rotating shaft (3362), and torsion springs (3364) are axially symmetrically sleeved on both ends of the rotating shaft (3362), and one end of the torsion spring (3364) is connected to the C-shaped clamping ring (3363), and the other end thereof is connected to the corresponding ear plate (3361).

8. The belt transfer point spray mechanism according to claim 2, characterized in that: The support plates (332) are rotatably connected to the corresponding support plates (331) through support shafts (3321) radially symmetrically connected to the outer peripheral walls of the support plates (332), and the outer ends of the support shafts (3321) are connected to the screw-on components (338) arranged on the corresponding support plates (331); The screw-on assembly (338) comprises a block seat (3381) vertically fixed to the outer facade of the corresponding support plate (331); the outer end gap of the support shaft (3321) passes through the middle of the block seat (3381), and the end face thereof is vertically fixed with a positioning column (3382); the outer peripheral wall of the positioning column (3382) is provided with a plurality of slots (33821) at equal intervals in the circumferential direction; the top surface of the block seat (3381) is vertically and symmetrically connected with a second ear plate (3385) along its center line; a pressing arm (3382) of a spoon-shaped structure is suspended between the two second ear plates (3385). 4), a semicircular protrusion (33841) is integrally connected to the bending part of the bottom surface of the pressing arm (3384), and the protrusion (33841) is pivotally connected to the two ear plates (3385); a clamping block (33842) is vertically connected to the bottom surface of the front end of the pressing arm (3384), and the clamping block (33842) can be radially engaged with the corresponding clamping groove (33821) rotated to the bottom thereof; the bottom surface of the rear end of the pressing arm (3384) and the top surface of the block seat (3381) are elastically connected via a top spring (3386) adapted thereto.

9. A belt transfer point spray mechanism according to claim 8, characterized in that: The outer end surface of the positioning column (3382) is axially integrated with a rotating cap (3383), the outer diameter of the rotating cap (3383) is larger than the outer diameter of the positioning column (3382), and the outer peripheral wall of the rotating cap (3383) is provided with anti-slip patterns.

10. A continuous charging coal shearing machine, characterized in that: The coal mining machine (1) comprises a belt transfer point spray mechanism as claimed in any one of claims 1 to 9; The coal mining machine (1) has a first transport belt (11) disposed obliquely upward in the middle, and the second transport belt (2) is hung at its tail, and the tail of the second transport belt (2) is rollingly supported by longitudinally symmetrically arranged legs (21) with running wheels; a mine car group (4) for transporting coal can pass between the two legs (21).

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