A cleaning mechanism for ball mill

Abstract

The present invention discloses a cleaning mechanism for a ball mill. A water spray device of the cleaning mechanism is installed in the ball mill and is provided with a water spray assembly, which sprays water to the inner wall surface of the ball mill under the action of centrifugal force; various special-shaped cleaning devices are installed on the water spray device and located inside the ball mill, and are pressed against the inner wall surface of the ball mill under the action of centrifugal force for cleaning; the bottom wall cleaning device is installed at the end of the water spray device and is used for cleaning the inner end surface of the ball mill. The present invention realizes a fully automated design and has a wider cleaning coverage range and better cleaning effect. The automatic expansion cleaning of the special-shaped cleaning plate ensures that there are no dead angles in the cleaning, and there is no need to use other auxiliary tools to remove residual impurities. Dirt is more effectively removed by physical wiping, ensuring thorough cleaning and improving cleaning efficiency. In combination with the arc-shaped water spray block, a wide range of spray cleaning coverage and all-round cleaning are achieved to ensure a cleaning effect without omissions. The mechanism is easy to operate and has a high degree of automation, which greatly improves the efficiency of the production line.

Description

Technical Field

[0001] The invention relates to a cleaning mechanism, in particular to a cleaning mechanism used for a ball mill. Background Art

[0002] Ball mill is an important crushing equipment widely used in mining, building materials, chemical industry and other fields. During the operation of the ball mill, due to the grinding effect of the material, a large amount of dust, impurities and residual material particles will be generated inside the mill. If these substances are not cleaned in time, they will have many adverse effects on the working efficiency and product quality of the ball mill. Therefore, a special cleaning mechanism is needed to clean the ball mill.

[0003] In the prior art, the cleaning mechanism of the ball mill usually relies on manual or semi-automatic operation to remove residual impurities. At present, a ball mill cleaning device that performs physical contact cleaning through a scraper ring and a scraper shovel has been proposed. However, there are the following defects: 1. The cleaning effect is poor and the efficiency is low, especially when dealing with stubborn dry materials, and it is difficult to fully cover the complex inner wall of the ball mill, resulting in cleaning dead corners. 2. The mechanical friction caused by cleaning with a scraper ring and a scraper shovel causes serious equipment wear and increases maintenance costs. 3. It relies on a complex mechanical transmission system of a hydraulic cylinder for operation, with a low degree of automation. The cleaning operation still requires a lot of manual intervention, which cannot meet the needs of modern industry for efficient and automated cleaning. Summary of the invention

[0004] In order to solve the problems existing in the background technology, the present invention provides a cleaning mechanism for a ball mill. The present invention aims to solve the problems of low cleaning efficiency, manual assistance and incomplete cleaning in the existing ball mill cleaning system, and achieves an automated and efficient cleaning effect by setting a special-shaped cleaning mechanism, a water spray mechanism and a bottom wall cleaning mechanism.

[0005] The technical solution adopted by the present invention is:

[0006] 1. A cleaning mechanism for a ball mill, comprising:

[0007] The water spray device is coaxially installed at the center of the horizontally arranged ball mill and is provided with a plurality of water spray components located inside the ball mill. Each water spray component sprays water evenly onto the entire inner wall surface of the ball mill under the action of centrifugal force.

[0008] A plurality of special-shaped cleaning devices are installed at intervals on the water spray device and are located inside the ball mill. Each special-shaped cleaning device is pressed against the inner wall of the ball mill under the action of centrifugal force to perform rotational cleaning and to remove impurities.

[0009] The bottom wall cleaning device is coaxially installed at the end of the water spray device and is located between the water spray device and the inner end surface of the ball mill. The outer peripheral end of the bottom wall cleaning device is pressed against the inner end side wall surface of the ball mill for rotational cleaning and isolation of impurities.

[0010] The base of the ball mill is horizontally installed at a fixed position, the outer peripheral surface of the bottom end of the drum of the ball mill is installed on the base through a support seat and a support column and is covered with a gear ring, the body of the first motor is installed on the base, the rotating shaft of the first motor is horizontally and synchronously connected to the center of the gear through a reducer, the rotating shaft of the first motor is parallel to the center of the drum of the ball mill, and the gear and the gear ring are meshed with each other; start the first motor to make the ball mill run, and when the ball mill needs to be cleaned, turn off the first motor to make the ball mill stationary.

[0011] The water spray device comprises a rectangular bottom plate, a support plate, a sealing cover, a hollow pipe, a sewage collecting tank, a water inlet assembly and a plurality of water spray assemblies. The rectangular bottom plate is horizontally installed at a fixed position. The outer peripheral surface of the opening at one end of the drum of the ball mill is installed on the rectangular bottom plate through the support plate. The sealing cover is sealingly installed at the opening at one end of the drum of the ball mill. The hollow pipe is coaxially installed inside the ball mill and the opening at one end passes through the center of the sealing cover and is connected to the outside. The water inlet assembly is installed on the side of the sealing cover and is respectively connected to the opening at one end of the hollow pipe and the external water tank. The sewage collecting tank is installed on the rectangular bottom plate and is located below the sealing cover. The bottom of the sealing cover is connected to the sewage collecting tank below through a pipeline. Each water spray assembly is evenly spaced along the length direction and circumferential direction of the hollow pipe and is connected to the inside of the hollow pipe. Each special-shaped cleaning device is evenly spaced between the outer peripheral surface of the hollow pipe and the inner wall surface of the drum of the ball mill. Each special-shaped cleaning device is evenly spaced and hinged to the central outer peripheral surface of the hollow pipe near the center of one side of the hollow pipe.

[0012] The outer diameter r of the hollow tube is r=(0.2~0.4)R, where R is the inner diameter of the drum of the ball mill.

[0013] The special-shaped cleaning device comprises a hinge, a special-shaped cleaning plate and cleaning cotton. The special-shaped cleaning plate is in the shape of a spiral strip. The hinge comprises a first connecting block, a first connecting rod, a second connecting rod, a second connecting block and an intermediate connecting block. The first connecting blocks of the hinges of each special-shaped cleaning device are evenly installed along the central outer peripheral surface of the hollow tube, the two ends of the first connecting rod are respectively hinged to the first connecting block and the intermediate connecting block, the second connecting block is installed at the center of a side surface of the special-shaped cleaning plate facing the hollow tube, and the two ends of the second connecting rod are respectively hinged to the intermediate connecting block and the second connecting block; the cleaning cotton and the special-shaped cleaning plate have the same length and are installed on a side surface of the special-shaped cleaning plate away from the hollow tube; under the action of centrifugal force, the hinge straightens so that the special-shaped cleaning plate moves toward the ball mill until the cleaning cotton completely fits the inner wall of the drum of the ball mill.

[0014] The horizontal length L of the special-shaped cleaning plate is approximately equal to the drum length of the ball mill; the cross-sectional shape of the special-shaped cleaning plate is a rectangle with a length of a and a width of b, a=(0.1~0.12)R, b=(0.06~0.08)R, R is the inner diameter of the drum of the ball mill, the pitch P of the special-shaped cleaning plate is approximately equal to twice the horizontal length L of the special-shaped cleaning plate, and the mid-diameter D0 of the helix of the special-shaped cleaning plate is D0=(1.7~1.9)R; the angle α between the cross-section of the special-shaped cleaning plate and the horizontal direction is 20°~25°; the length L1 of the first connecting rod and the length L2 of the second connecting rod of the hinge satisfy: L1+L2≥(Rr) / 2, L1=(1.5~2)L2.

[0015] The wall of the hollow tube is provided with a plurality of rectangular grooves for spraying water and installing water spray components at even intervals along its length direction and circumferential direction. A water outlet hole connected to the inside of the hollow tube is provided at the bottom of one side of the rectangular groove. Each water spray component is installed in its own rectangular groove and its root end is directly opposite to the water outlet hole. The water spray component comprises a rotating shaft and an arc-shaped water spray block. The rotating shaft is horizontally installed in the rectangular groove along the length direction of the hollow tube. The root end of the arc-shaped water spray block is installed in the rectangular groove and hinged to the rotating shaft. The inner arc surface of the arc-shaped water spray block is provided with a water spray groove along its length direction and is connected to the inside of the hollow tube through the water outlet hole. When each water spray component is not unfolded, the whole is located in the rectangular groove. Under the action of centrifugal force, the arc-shaped water spray block unfolds in the same direction. The water inlet component sprays water through the inside of the hollow tube, the water outlet hole and the water spray groove of the arc-shaped water spray block to the inner wall surface of the drum of the ball mill.

[0016] The water inlet assembly includes a plurality of third connecting rods, a connecting shaft, a circular sleeve, a water inlet pipe, a second motor and a motor sleeve. A limiting ring is provided on the outer peripheral surface of an opening at one end of the hollow tube. One end face of the connecting shaft is coaxially connected to the outside of an opening at one end of the hollow tube through each third connecting rod. A limiting ring is provided on the outer peripheral surface of the connecting shaft. Trapezoidal rotation grooves are provided on the inner side surfaces at both ends of the circular sleeve. The circular sleeve is respectively mounted on the limiting rings of the water inlet pipe and the connecting shaft through the trapezoidal rotation groove sealing sleeves at both ends. Each third connecting rod is located inside the circular sleeve; the motor sleeve is mounted on the sealing cover, the body of the second motor is mounted on the motor sleeve, and the output shaft of the second motor is horizontally and synchronously connected to the center of the other end face of the connecting shaft through a coupling; the interior of the circular sleeve is connected to the external water tank through the water inlet pipe, and then the water passes through the water inlet pipe and the circular sleeve in turn and flows into the hollow tube.

[0017] The described bottom wall cleaning device includes a telescopic component and several cleaning components. The telescopic component includes a connecting plate and a conical block. The connecting plate is integrally formed by multiple strip-shaped branch plates, and each strip-shaped branch plate is evenly spaced around the center of the connecting plate. The connecting plate is a hollow structure. The center of one side surface of the connecting plate is coaxially installed at the center of the other end of the hollow tube. A first circular groove is opened at the center of the other side surface of the connecting plate. A second circular groove communicating with the first circular groove is opened along the length direction of the center of each branch plate of the connecting plate; the conical block is coaxially and movably installed in the first circular groove with the inclined surface located inside the first circular groove. Rectangular sliding grooves are opened along the length direction of the hollow tube on the outer side surfaces of the bending positions at the center of the connecting plate. A number of U-shaped limiting rods are evenly spaced along the circumference on the side surface of the end with the largest diameter of the conical block. The U-shaped side of each U-shaped limiting rod is slidably installed in one of the rectangular sliding grooves; each cleaning component is respectively slidably installed in the second circular groove of each branch plate of the connecting plate, and the root end abuts against the inclined surface of the conical block.

[0018] The described cleaning component includes a fourth connecting rod, a trapezoidal adapter block, a sector-shaped cleaning plate, two rectangular support plates, two telescopic rods, and two springs. The fourth connecting rod is slidably installed in the second circular groove of the branch plate of the connecting plate. The trapezoidal adapter block is installed at one end of the fourth connecting rod and abuts against the inclined surface of the conical block. The other end of the fourth connecting rod is connected to the center of the inner ring of the sector-shaped cleaning plate. Two rectangular support plates are symmetrically installed on the outer side surface of the branch plate of the connecting plate. Two telescopic rods are respectively connected to both sides of the center of the inner ring of the two rectangular support plates and the sector-shaped cleaning plate. The two telescopic rods are parallel and spaced on both sides of the symmetry of the fourth connecting rod, and each is sleeved with a spring.

[0019] II. A cleaning method for a cleaning mechanism of a ball mill, including:

[0020] When the ball mill is to be cleaned, the drum of the ball mill is first controlled to stop rotating, and the water spray device and the cleaning assembly are coaxially installed from the drum mouth of the ball mill to the inside of the drum. When the end face of the conical block abuts the inner end face of the ball mill, the conical block is pushed into the first circular groove, and the inclined surface of the conical block pushes each trapezoidal adapter block so that each fourth connecting rod pushes the fan-shaped cleaning plate to move until the outer ring abuts the inner wall of the drum of the ball mill; the second motor is started to drive the rotation along its own central axis, and water is introduced into the hollow tube through the water inlet pipe of the water inlet assembly. Under the action of centrifugal force, water is sequentially sprayed onto the inner wall of the drum of the ball mill through the inside of the hollow tube, the water outlet and the water spray slot of the arc-shaped water spray block. Each special-shaped cleaning device The cleaning plate moves until the cleaning cotton completely fits the inner wall of the drum of the ball mill, thereby cleaning the inner wall of the ball mill during rotation, and the cleaned water flows out from the water pipe on the sealing cover to the sewage collection tank; after flushing, the second motor is turned off, and when the hollow tube stops rotating completely, the special-shaped cleaning plate loses the effect of centrifugal force. At this time, the special-shaped cleaning plates located above move closer to the hollow tube under the action of gravity, and the special-shaped cleaning plates located below contact with the inner wall of the ball mill. The impurities generated by cleaning in the ball mill are located on the inner wall of the bottom of the ball mill under the action of gravity, and the water spray device is pulled out from the length direction of the ball mill, and the impurities at the bottom are brought out through the special-shaped cleaning plates located below, and finally the cleaning is completed.

[0021] The beneficial effects of the present invention are:

[0022] 1. Fully automated design: The present invention realizes the automatic expansion and cleaning function of the special-shaped cleaning plate, uses centrifugal force to drive the special-shaped cleaning plate to expand and cooperates with the multi-stage mechanical structure of the connecting rod to achieve automatic physical wiping of the inner wall of the ball mill. The angle and expansion degree of the special-shaped cleaning plate are automatically adjusted to ensure that there are no dead angles in the cleaning, and the residual impurities can be concentrated and cleaned to the bottom of the ball mill, and automatically discharged through the bottom wall cleaning mechanism, completely avoiding the need for manual intervention.

[0023] 2. Wider cleaning coverage: The arc-shaped water spray block designed by the present invention is combined with the special-shaped cleaning plate to achieve a wide range of spray cleaning coverage, including the deep inner wall of the ball mill, which is easy to form a cleaning dead corner, and can effectively remove the stubborn dirt in the ball mill. It can achieve all-round cleaning and ensure a clean effect without omissions.

[0024] 3. Optimization of cleaning effect: The physical wiping function of the special-shaped cleaning plate of the present invention can more effectively remove various dirt on the inner wall of the ball mill, whether it is impurities with strong adhesion or stains that are difficult to wash off, ensuring thorough cleaning and improving cleaning efficiency.

[0025] 4. Easy to operate: The cleaning mechanism of the present invention is easy to operate, and the installation and startup process is highly automated. The operator does not need to perform complicated adjustments and maintenance work, which greatly improves the efficiency of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of the special-shaped cleaning plate of the present invention;

[0028] Figure 3 It is a schematic diagram of the front sectional structure of the mechanism of the present invention;

[0029] Figure 4 It is a partial structural schematic diagram of the special-shaped cleaning mechanism of the present invention;

[0030] Figure 5 It is a partial structural schematic diagram of the bottom wall cleaning mechanism of the present invention;

[0031] Figure 6 It is an enlarged structural schematic diagram of the A position in the special-shaped cleaning mechanism of the present invention;

[0032] Figure 7 It is an enlarged structural schematic diagram of point B in the front side cross-sectional structure of the mechanism of the present invention;

[0033] Figure 8 It is an enlarged structural schematic diagram of the bottom wall cleaning mechanism at C of the present invention;

[0034] Fig. 9 It is a schematic diagram of the enlarged structure at D in the front side cross-sectional structure of the mechanism of the present invention;

[0035] Fig.10 It is a schematic diagram of the enlarged structure of the front side cross-sectional structure of the mechanism of the present invention at position E;

[0036] Fig.11 It is a schematic diagram of the local structure of the ball mill of the present invention;

[0037] In the figure: 1. Ball mill, 111. Base, 112. First motor, 113. Reducer, 114. Central rotating shaft, 115. Gear, 116. Tooth ring, 117. Support seat, 118. Support column, 2. Special-shaped cleaning device, 201. First connecting block, 202. First connecting rod, 203. Second connecting rod, 204. Second connecting block, 205. Special-shaped cleaning plate, 206. Cleaning cotton, 3. Water spraying device, 301. Rectangular bottom plate, 302. Support plate, 303. Sealing cover, 304. Hollow pipe, 305. Sewage collection pool, 31. Water inlet assembly, 311. Third connecting rod, 312. Connecting shaft, 313. Circular sleeve, 314. Trapezoidal rotating groove, 315. Limit ring, 316. Water inlet pipe, 317. Second motor, 318. Motor sleeve, 32. Water spraying assembly, 320. Rectangular groove, 321. Rotating shaft, 322. Arc-shaped water spraying block, 323. Water outlet hole, 324. Water spraying groove, 4. Bottom wall cleaning device, 41. Telescopic assembly, 411. Connecting plate, 412. First circular groove, 413. Tapered block, 414. Rectangular sliding groove, 415. C-shaped limiting rod, 416. Second circular groove, 42. Cleaning assembly, 421. Fourth connecting rod, 422. Trapezoidal adapter block, 423. Sector-shaped cleaning plate, 424. Rectangular support plate, 425. Telescopic rod, 426. Spring. Detailed implementation mode

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0039] As Figure 1 and Figure 5 shown, the cleaning mechanism for a ball mill of the present invention includes a water spraying device 3, three special-shaped cleaning devices 2 and a bottom wall cleaning device 4. The water spraying device 3 is coaxially installed at the center of the horizontally arranged ball mill 1 and is provided with twelve water spraying assemblies 32 located inside the ball mill 1. Each water spraying assembly 32 evenly sprays water onto the entire inner side wall surface of the ball mill 1 under the action of centrifugal force; each special-shaped cleaning device 2 is installed on the water spraying device 3 at intervals and is located inside the ball mill 1. Each special-shaped cleaning device 2 is pressed against the inner side wall surface of the ball mill 1 under the action of centrifugal force for rotary cleaning and is used to carry out impurities; the bottom wall cleaning device 4 is coaxially installed at the end of the water spraying device 3 and is located between the water spraying device 3 and the inner end surface of the ball mill 1. The outer peripheral end of the bottom wall cleaning device 4 is pressed against the inner end side wall surface of the ball mill 1 for rotary cleaning and is used for the isolation of impurities.

[0040] As Figure 1 and Fig.11As shown, the base 111 of the ball mill 1 is horizontally installed at a fixed position, the outer peripheral surface of the bottom end of the drum of the ball mill 1 is installed on the base 111 through a support seat 117 and a support column 118 and is provided with a gear ring 116, the body of the first motor 112 is installed on the base 111, the rotating shaft 114 of the first motor 112 is horizontally and synchronously connected to the center of the gear 115 through a reducer 113, the rotating shaft 114 of the first motor 112 is parallel to the center of the drum of the ball mill 1, and the gear 115 and the gear ring 116 are meshed with each other; the first motor 112 is started to make the ball mill 1 run, and when the ball mill 1 needs to be cleaned, the first motor 112 is turned off to make the ball mill stationary.

[0041] like Figure 3 , Figure 4 and Figure 5 As shown, the water spray device 3 includes a rectangular bottom plate 301, a support plate 302, a sealing cover 303, a hollow tube 304, a sewage collection tank 305, a water inlet assembly 31 and twelve water spray assemblies 32. The rectangular bottom plate 301 is horizontally installed at a fixed position. The outer peripheral surface of the opening at one end of the drum of the ball mill 1 is installed on the rectangular bottom plate 301 through the support plate 302. The sealing cover 303 is sealed and installed at the opening at one end of the drum of the ball mill 1. The hollow tube 304 is coaxially installed inside the ball mill 1 and the opening at one end passes through the center of the sealing cover 303 and is connected to the outside. The water inlet assembly 31 is installed on the side of the sealing cover 303 and is respectively connected to the opening at one end of the hollow tube 304 and the outside. The sewage collecting tank 305 is installed on the rectangular bottom plate 301 and is located below the sealing cover 303. The bottom of the sealing cover 303 is connected to the sewage collecting tank 305 below through a pipeline; each water spray component 32 is evenly spaced along the length direction and the circumferential direction of the hollow tube 304 and is connected to the inside of the hollow tube 304. Four water spray components 32 are arranged in the length direction and three water spray components 32 are arranged in the circumferential direction; each special-shaped cleaning device 2 is evenly spaced and installed between the outer peripheral surface of the hollow tube 304 and the inner wall surface of the drum of the ball mill 1. Each special-shaped cleaning device 2 is evenly spaced and hinged to the central outer peripheral surface of the hollow tube 304 at the center of one side surface close to the hollow tube 304.

[0042] like Figure 3 and Figure 4As shown, the special-shaped cleaning device 2 includes a hinge, a special-shaped cleaning plate 205 and a cleaning cotton 206. The special-shaped cleaning plate 205 is a spiral strip. The hinge includes a first connecting block 201, a first connecting rod 202, a second connecting rod 203, a second connecting block 204 and an intermediate connecting block. The first connecting blocks 201 of the hinges of each special-shaped cleaning device 2 are evenly installed along the central outer peripheral surface of the hollow tube 304. The two ends of the first connecting rod 202 are respectively hinged to the first connecting block 201 and the intermediate connecting block. The second connecting block 204 is installed at the center of a side surface of the special-shaped cleaning plate 205 facing the hollow tube 304, and the two ends of the second connecting rod 203 are respectively hinged to the middle connecting block and the second connecting block 204; the cleaning cotton 206 and the special-shaped cleaning plate 205 have the same length and are installed on the side surface of the special-shaped cleaning plate 205 away from the hollow tube 304; under the action of centrifugal force, the hinge straightens so that the special-shaped cleaning plate 205 moves toward the ball mill 1 until the cleaning cotton 206 is completely in contact with the inner wall of the drum of the ball mill 1.

[0043] like Figure 2 As shown, the special-shaped cleaning plate 205 is made of 316L stainless steel, has good corrosion resistance and wear resistance, and is suitable for the working environment inside the ball mill 1. The essence of its structure is a solid obtained by scanning the inner cylinder wall section of a specific ball mill 1 along the spiral line. In the specific implementation, the horizontal length L of the special-shaped cleaning plate 205 is set to 500mm. In order to ensure that it does not interfere with the bottom wall cleaning device 4, the value of L is approximately equal to the length of the drum of the ball mill 1. Assuming that the cross-sectional shape of the special-shaped cleaning plate 205 is a rectangle with a length of a and a width of b, under the premise of ensuring its rigidity, the special-shaped cleaning plate 205 should be made as lightweight as possible, and its cross-sectional size is designed based on the inner diameter of the ball mill 1. The preferred value range is: a=(0.1~0.12)R, b=(0.06~0.08)R, the inner diameter R of the ball mill 1 is 250mm, the length a is 25~30mm, preferably 30mm, and the width b is 15~20mm, preferably 20mm. In the specific implementation, the pitch P of the special-shaped cleaning plate 205 is set to 1000mm. In order to ensure the scraping efficiency, the pitch P should be as large as possible, with a value of P≈2L. Such a design can cover a larger area of ​​the inner wall of the ball mill 1 per rotation through the centrifugal force, thereby greatly improving the cleaning efficiency.

[0044] like Figure 2 As shown in the cross-sectional view, the outer diameter of the hollow tube 304 is r, wherein the preferred r=(0.2-0.4)R, the outer diameter r is 50~100mm, preferably 75mm. The middle diameter of the helix of the special-shaped cleaning plate 205 is set to D0, and the value of D0 should be less than 2R, wherein the preferred D0=(1.7-1.9)R, the middle diameter of the helix D0 is 425~475mm, preferably 450mm, and it is necessary to ensure that the circle of the middle diameter passes through the cross-sectional center of the special-shaped cleaning plate 205. Assume that the rotation angle of the helix is θ ,in θ ∈[0°,180°], preferably θ is 180°, and the parametric equation of the helix is ​​as follows:

[0045] x ( θ )=(D0·cos( θ )) / 2

[0046] y ( θ )=(D0·sin( θ )) / 2

[0047] z ( θ )=(P θ / 2π)

[0048] in, x ( θ ), y ( θ )and z ( θ ) represent the projections of the spiral line of the special-shaped cleaning plate 205 in the x-axis, y-axis and z-axis directions respectively.

[0049] During the rotation, the special-shaped cleaning plate 205 has a certain angle with the inner wall of the ball mill 1 to ensure that its edge can scrape off dirt. In the specific implementation, the angle α between the cross section of the special-shaped cleaning plate 205 and the horizontal direction is set to 20°~25°, preferably 25°. The value should not be too large, otherwise it will cause waste of inner wall space and materials, and should not be too small, otherwise the angle between the outer side of the special-shaped cleaning plate 205 and the inner wall of the ball mill 1 will be too small, or even close, increasing friction resistance and causing difficulty in starting. Through this design, the outer side of the cleaning cotton 206 can always maintain a surface contact rate of at least 80% with the inner wall of the ball mill 1, thereby ensuring that the cleaning effect during physical wiping is maximized. Based on this, z( θ ) is corrected by introducing a correction coefficient k, where the preferred k∈[0.8,1.2], preferably 1, that is, the parametric equation of the helix is ​​corrected to:

[0050] x ( θ )=(D0·cos( θ )) / 2

[0051] y ( θ )=(D0·sin( θ )) / 2

[0052] z ( θ )=(P θ / 2π)+k·tan(α)

[0053] The lengths of the first connecting rod 202 and the second connecting rod 203 are set to L1 and L2 respectively, to ensure that the special-shaped cleaning plate 205 can completely contact the inner wall of the ball mill 1 when the connecting rods 202 and 203 are unfolded and rotated. The lengths of the two connecting rods 202 and 203 should meet the following requirements:

[0054] L1+L2≥(Rr) / 2

[0055] The preferred L1=(1.5~2)L2, this ratio range can strike a balance between rigidity and flexibility according to specific design requirements, ensuring that the special-shaped cleaning plate 205 can be smoothly unfolded under the action of centrifugal force and reliably reset when stopped. In specific implementation, the length L1 of the connecting rod 202 is 37.5~80mm, preferably 50mm, and the length L2 of the connecting rod 203 is 25~40mm, preferably 25mm. In addition, in order to prevent the special-shaped cleaning plate 205 from being affected by uneven stress during rotation, the hinge connected to it should be located at 1 / 2 of the total length L of the special-shaped cleaning plate 205, and the three hinges are evenly distributed on the circumference of the hollow tube 304, and the angle between each hinge and the line connecting the center of the circle is 120°, that is, two adjacent hinges are arranged at equal distances on the circumference. Such a design ensures that the hinges are symmetrically distributed on the circumference, ensuring the stability of the structure and uniform force.

[0056] like Figure 5 and Figure 8 As shown, a plurality of rectangular grooves 320 for spraying water and installing the water spray assembly 32 are evenly spaced on the wall of the hollow tube 304 along its length direction and circumferential direction. A water outlet hole 323 communicating with the inside of the hollow tube 304 is opened at the bottom of one side of the rectangular groove 320. Each water spray assembly 32 is installed in a respective rectangular groove 320 with the root end facing the water outlet hole 323. The water spray assembly 32 includes a rotating shaft 321 and an arc-shaped water spray block 322. The rotating shaft 321 is horizontally installed in the rectangular groove 320 along the length direction of the hollow tube 304. The arc-shaped water spray block 322 The root end of the arc-shaped water spray block 322 is installed in the rectangular groove 320 and hinged to the rotating shaft 321. The inner arc surface of the arc-shaped water spray block 322 is provided with a water spray groove 324 along its length direction and is connected to the inside of the hollow tube 304 through the water outlet 323; when each water spray component 32 is not unfolded, it is located in the rectangular groove 320 as a whole. Under the action of centrifugal force, the arc-shaped water spray block 322 unfolds in the same direction, and the water inlet component 31 sprays water through the inside of the hollow tube 304, the water outlet 323 and the water spray groove 324 of the arc-shaped water spray block 322 to the inner wall surface of the drum of the ball mill 1.

[0057] like Figure 1 , Figure 3 , Figure 6 and Figure 7As shown in the figure, the water inlet assembly 31 includes several third connecting rods 311, a connecting shaft 312, a circular sleeve 313, a water inlet pipe 316, a second motor 317, and a motor sleeve 318. A limiting ring 315 is provided on the outer peripheral surface of one end opening of the hollow pipe 304. One end surface of the connecting shaft 312 is coaxially connected to the outside of one end opening of the hollow pipe 304 through each third connecting rod 311. A limiting ring 315 is provided on the outer peripheral surface of the connecting shaft 312. Trapezoidal rotating grooves 314 are provided on the inner side surfaces at both ends of the circular sleeve 313. The circular sleeve 313 is hermetically sleeved on the limiting rings 315 of the water inlet pipe 316 and the connecting shaft 312 respectively through the trapezoidal rotating grooves 314 at both ends. Each third connecting rod 311 is located inside the circular sleeve 313. The motor sleeve 318 is installed on the sealing cover 303. The body of the second motor 317 is installed on the motor sleeve 318. The output shaft of the second motor 317 is horizontally and synchronously connected to the center of the other end surface of the connecting shaft 312 through a coupling. The inside of the circular sleeve 313 is communicated with an external water tank through the water inlet pipe 316, and then water flows through the water inlet pipe 316 and the circular sleeve 313 in sequence and then flows into the hollow pipe 304.

[0058] As Figure 4 , Figure 5 and Fig. 9 shown in the figure, the bottom wall cleaning device 4 includes a telescopic assembly 41 and three cleaning assemblies 42. The telescopic assembly 41 includes a connecting plate 411 and a tapered block 413. The connecting plate 411 is integrally formed by a plurality of strip-shaped branch plates. Each strip-shaped branch plate is evenly spaced around the center of the connecting plate 411. The connecting plate 411 is a hollow structure. The center of one side surface of the connecting plate 411 is coaxially installed at the center of the other end of the hollow pipe 304. A first circular groove 412 is provided at the center of the other side surface of the connecting plate 411. Second circular grooves 416 communicating with the first circular groove 412 are provided along the length direction of the center of each branch plate of the connecting plate 411. The tapered block 413 is coaxially and movably installed in the first circular groove 412 and the inclined surface is located inside the first circular groove 412. Rectangular sliding grooves 414 are provided on the outer side surfaces of each bending position at the center of the connecting plate 411 along the length direction of the hollow pipe 304. A plurality of U-shaped limiting rods 415 are evenly spaced along the circumferential direction on the side surface of the end with the largest diameter of the tapered block 413. The U-shaped side of each U-shaped limiting rod 415 is slidably installed in one of the rectangular sliding grooves 414. Each cleaning assembly 42 is slidably installed in the second circular groove 416 of each branch plate of the connecting plate 411 and the root end abuts against the inclined surface of the tapered block 413.

[0059] As Fig.10As shown, the cleaning assembly 42 includes a fourth connecting rod 421, a trapezoidal adapter block 422, a fan-shaped cleaning plate 423, two rectangular support plates 424, two telescopic rods 425 and two springs 426. The fourth connecting rod 421 is slidably installed in the second circular groove 416 of the branch plate of the connecting plate 411. The trapezoidal adapter block 422 is installed at one end of the fourth connecting rod 421 and abuts the inclined surface of the conical block 413. The other end of the fourth connecting rod 421 is connected to the inner ring center of the fan-shaped cleaning plate 423. The two rectangular support plates 424 are symmetrically installed on the outer side surfaces of the branch plates of the connecting plate 411. The two telescopic rods 425 are respectively connected to the two rectangular support plates 424 and the fan-shaped cleaning plate 423 on both sides of the inner ring center. The two telescopic rods 425 are parallel and spaced apart and are located on both sides of the symmetrical side of the fourth connecting rod 421 and are each fitted with a spring 426.

[0060] The cleaning method of the cleaning mechanism for a ball mill of the present invention is specifically as follows:

[0061] When the ball mill 1 needs to be used, the first motor 112 can be started. The first motor 112 drives the gear 115 to rotate slowly through the rotating shaft 114 and the reducer 113. When the gear 115 rotates, it will drive the ball mill 1 to rotate slowly on the support column 118 on the support seat 117 under the action of the gear ring 116, so as to grind the material in the ball mill 1; when the ball mill 1 needs to be cleaned, the material and steel balls inside the ball mill 1 are taken out. The ball mill 1 is driven by a motor with a brake device, and the motor with a brake device has a clear self-locking function after stopping. Then, the cleaning mechanism device is placed on one side of the ball mill 1, the rectangular bottom plate 301 is pushed, and the sealing cover 303 is covered on the ball mill 1, so that the part of the mechanism located on the right side of the sealing cover 303 is The component is inserted into the ball mill 1. Before the insertion, each of the special-shaped cleaning plates 205 is in a state of being close to each other. During the insertion, the conical block 413 will first be restricted by the inner wall of the ball mill 1 and stop moving, while the mechanism continues to be inserted. At this time, the trapezoidal adapter block 422 will push the fan-shaped cleaning plate 423 on the fourth connecting rod 421 to expand in a direction away from the conical block 413 under the action of the conical block 413 until it is fully inserted. The fan-shaped cleaning plate 423 stops expanding, so that the expansion degree can be automatically adjusted according to the condition of the inner wall of the ball mill 1, which can ensure that the fan-shaped cleaning plate 423 is closely attached to the inner wall of the ball mill 1 after being fully inserted, avoiding scraping impurities on the inner wall deeper during the insertion process, and can more accurately clean the existing impurities on the inner wall of the ball mill 1. , which improves the accuracy of the cleaning effect and ensures that every impurity can be effectively treated, thereby improving product quality; after it is fully inserted, the second motor 317 on the motor sleeve 318 is started, and the second motor 317 drives the hollow tube 304 to rotate in the circular sleeve 313 under the action of the trapezoidal slide groove 314 and the limit ring 315 through the connecting shaft 312 and the third connecting rod 311. When the hollow tube 304 rotates, the arc-shaped water spray block 322 on the rotating shaft 321 will expand outward under the action of the centrifugal force generated by the rotation of the hollow tube 304 due to the centrifugal force. After fully expanded, the water spray groove 324 is connected to the water outlet hole 323. At this time, water is injected into the hollow tube 304 through the water inlet pipe 316, and the water injected into the hollow tube 304 will also pass through the water outlet hole 323 under the action of the centrifugal force. 23 and the water spraying slot 324 are thrown out, and the water spraying under the action of centrifugal force can cover a wider range. When the arc-shaped water spraying block 322 expands outwards and sprays water under the action of centrifugal force, the water will be thrown out to the surroundings at a higher speed, so that it can cover a larger area inside the ball mill, ensuring the effective cleaning of various stubborn stains and attachments on the inner wall of the ball mill 1, and reducing the dead corners of cleaning. When the arc-shaped water spraying block 322 is expanded, the special-shaped cleaning plate 205 on the second connecting block 204 will also expand outwards through the connection between the second connecting rod 203 and the first connecting rod 202 under the action of the centrifugal force generated by the rotation of the hollow tube 304, until the outer wall of the cleaning cotton 206 contacts the inner wall of the ball mill 1, so that the inner wall of the ball mill 1 is cleaned by the cleaning cotton 206;After the cleaning is completed, the motor 317 is turned off. When the hollow tube 304 stops rotating completely, the special-shaped cleaning plates 205 lose the effect of centrifugal force. The two special-shaped cleaning plates 205 located at the top will move closer to the hollow tube 304 under the action of gravity, and the special-shaped cleaning plates 205 located at the bottom will contact the bottom wall of the ball mill 1. The impurities generated by the cleaning in the ball mill 1 will be located at the bottom of the ball mill 1 under the action of gravity. The pulling mechanism will cause the special-shaped cleaning plates 205 located at the bottom to take out the impurities at the bottom of the ball mill 1. When the arc-shaped water spray block 322 is unfolded, the special-shaped cleaning plates 205 also expand outward, so that the cleaning cotton 206 and the ball mill 1 are in contact. The inner wall of the ball mill 1 can be physically wiped and cleaned while spraying water, so that various dirt on the inner wall of the ball mill 1 can be removed more effectively. Whether it is impurities with strong adhesion or stains that are difficult to wash off, they can be better processed, greatly improving the efficiency and quality of cleaning, and avoiding impurities from remaining in the ball mill 1, ensuring the thoroughness of cleaning, and reducing the difficulty and workload of manually cleaning impurities at the bottom, improving the convenience of cleaning operation. Since the motor driving the ball mill 1 has self-locking properties, when the device is used to clean the ball mill 1, the ball mill 1 will not rotate with the rotation of the device. ;

[0062] The present invention provides a special-shaped cleaning device 2. When the arc-shaped water spray block 322 is unfolded, the special-shaped cleaning plate 205 will expand outward through the connection between the first connecting rod 202 and the second connecting rod 203 under the action of the centrifugal force generated by the rotation of the hollow tube 304, until the outer wall of the cleaning cotton 206 contacts the inner wall of the ball mill 1, thereby cleaning the inner wall of the ball mill 1 through the cleaning cotton 206, and turning off the second motor 317 after flushing is completed.

[0063] The present invention sets a water spray device 3, after it is fully inserted, starts the second motor 317, and the second motor 317 drives the hollow tube 304 to rotate in the circular sleeve 313 under the action of the trapezoidal slide 314 and the limit ring 315 through the connecting shaft 312 and each third connecting rod 311. When the hollow tube 304 rotates, the arc-shaped water spray block 322 on the rotating shaft 321 will expand outward under the action of the centrifugal force generated by the rotation of the hollow tube 304. After fully expanded, the water spray groove 324 is connected to the water outlet 323. When water is injected into the hollow tube 304 through the water inlet pipe 316, the water injected into the hollow tube 304 will also be thrown out through the water outlet hole 323 and the water spraying groove 324 under the action of centrifugal force. The water spraying under the action of centrifugal force can cover a wider range. When the arc-shaped water spraying block 322 expands outward and sprays water under the action of centrifugal force, the water will be thrown out to the surroundings at a higher speed, so as to cover a larger area inside the ball mill 1, ensuring the effective cleaning of various stubborn stains and attachments on the inner wall of the ball mill 1 and reducing the dead corners of cleaning.

[0064] The present invention sets a bottom wall cleaning device 4. When inserting, the conical block 413 will first be restricted by the inner wall of the ball mill 1 and stop moving, while the device continues to be inserted. At this time, the trapezoidal adapter block 422 will push the fan-shaped cleaning plate 423 on the fourth connecting rod 421 to expand in the direction away from the conical block 413 under the action of the conical block 413 until it is fully inserted. The fan-shaped cleaning plate 423 stops expanding, so that the expansion degree can be automatically adjusted according to the situation of the inner wall of the ball mill 1. It can ensure that the fan-shaped cleaning plate 423 is tightly fitted with the inner wall of the ball mill 1 after being fully inserted, avoiding scraping impurities on the inner wall to deeper during the insertion process, and can more accurately clean the existing impurities on the inner wall of the ball mill 1, thereby improving the accuracy of the cleaning effect and ensuring that each impurity can be effectively processed, thereby improving product quality.

[0065] The above description of the embodiments is to facilitate the understanding and application of the present invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to the above embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention should be within the scope of protection of the present invention.

Claims

1. A cleaning mechanism for a ball mill, characterized in that: include: A water spray device (3) is coaxially mounted at the center of the horizontally arranged ball mill (1) and is provided with a plurality of water spray assemblies (32) located inside the ball mill (1), wherein each water spray assembly (32) sprays water uniformly onto the entire inner wall surface of the ball mill (1) under the action of centrifugal force; A plurality of special-shaped cleaning devices (2) are installed at intervals on the water spray device (3) and are located inside the ball mill (1), and each special-shaped cleaning device (2) is pressed against the inner wall surface of the ball mill (1) under the action of centrifugal force to perform rotational cleaning and remove impurities; A bottom wall cleaning device (4) is coaxially mounted on the end of the water spray device (3) and is located between the water spray device (3) and the inner end surface of the ball mill (1); the outer peripheral end of the bottom wall cleaning device (4) is pressed against the inner end side wall surface of the ball mill (1) for rotational cleaning and for isolating impurities; The water spray device (3) comprises a rectangular bottom plate (301), a support plate (302), a sealing cover (303), a hollow tube (304), a sewage collecting tank (305), a water inlet assembly (31) and a plurality of water spray assemblies (32). The rectangular bottom plate (301) is horizontally mounted at a fixed position. The outer peripheral surface of an opening at one end of the drum of the ball mill (1) is mounted on the rectangular bottom plate (301) through the support plate (302). The sealing cover (303) is sealingly mounted at an opening at one end of the drum of the ball mill (1). The hollow tube (304) is coaxially mounted inside the ball mill (1) and an opening at one end passes through the center of the sealing cover (303) and is connected to the outside. The water inlet assembly (31) is mounted on the side of the sealing cover (303). The rectangular bottom plate (301) and the sealing cover (303) are connected to the sewage collecting tank (305) below. The bottom of the sealing cover (303) is connected to the sewage collecting tank (305) below through a pipeline. The water spraying components (32) are evenly spaced along the length direction and the circumferential direction of the hollow tube (304) and are connected to the inside of the hollow tube (304). The special-shaped cleaning devices (2) are evenly spaced and installed between the outer peripheral surface of the hollow tube (304) and the inner wall surface of the drum of the ball mill (1). The special-shaped cleaning devices (2) are evenly spaced and hinged to the central outer peripheral surface of the hollow tube (304) near the center of one side surface of the hollow tube (304).

2. The cleaning mechanism for a ball mill according to claim 1, characterized in that: The outer diameter r of the hollow tube (304) is r=(0.2-0.4)R, where R is the inner diameter of the drum of the ball mill (1).

3. The cleaning mechanism for a ball mill according to claim 1, characterized in that: The special-shaped cleaning device (2) comprises a hinge, a special-shaped cleaning plate (205) and cleaning cotton (206); the special-shaped cleaning plate (205) is in the shape of a spiral strip; the hinge comprises a first connecting block (201), a first connecting rod (202), a second connecting rod (203), a second connecting block (204) and an intermediate connecting block; the first connecting blocks (201) of the hinges of each special-shaped cleaning device (2) are evenly spaced and installed along the central outer peripheral surface of the hollow tube (304); the two ends of the first connecting rod (202) are respectively hinged to the first connecting block (201) and the intermediate connecting block; The second connecting block (204) is mounted at the center of a side surface of the special-shaped cleaning plate (205) facing the hollow tube (304), and the two ends of the second connecting rod (203) are respectively hinged to the middle connecting block and the second connecting block (204); the cleaning cotton (206) and the special-shaped cleaning plate (205) have the same length and are mounted on a side surface of the special-shaped cleaning plate (205) away from the hollow tube (304); under the action of centrifugal force, the hinged member is straightened so that the special-shaped cleaning plate (205) moves toward the ball mill (1) until the cleaning cotton (206) completely fits the inner wall surface of the drum of the ball mill (1).

4. The cleaning mechanism for a ball mill according to claim 3, characterized in that: The horizontal length L of the special-shaped cleaning plate (205) is equal to the length of the drum of the ball mill (1); the cross-sectional shape of the special-shaped cleaning plate (205) is a rectangle with a length a and a width b, a=(0.1-0.12)R, b=(0.06-0.08)R, R is the inner diameter of the drum of the ball mill (1), and the pitch P of the special-shaped cleaning plate (205) is equal to twice the horizontal length L of the special-shaped cleaning plate (205). The spiral mid-diameter D0 of the special-shaped cleaning plate (205) is D0=(1.7~1.9)R; the angle α between the cross section of the special-shaped cleaning plate (205) and the horizontal direction is 20°~25°; the length L1 of the first connecting rod (202) of the hinge and the length L2 of the second connecting rod (203) satisfy: L1+L2≥(Rr) / 2, L1=(1.5~2)L2, r is the outer diameter of the hollow tube (304).

5. The cleaning mechanism for a ball mill according to claim 1, characterized in that: A plurality of rectangular grooves (320) for spraying water and installing the water spray assembly (32) are evenly spaced on the wall of the hollow tube (304) along its length direction and circumferential direction. A water outlet hole (323) communicating with the inside of the hollow tube (304) is provided at the bottom of one side of the rectangular groove (320). Each water spray assembly (32) is installed in a respective rectangular groove (320) with its root end facing the water outlet hole (323). The water spray assembly (32) comprises a rotating shaft (321) and an arc-shaped water spray block (322). The rotating shaft (321) is horizontally installed in the rectangular groove (320) along the length direction of the hollow tube (304). The arc-shaped water spray block (322) is provided at a position corresponding to the length of the hollow tube (304). The root end of the arc-shaped water spray block (322) is installed in the rectangular groove (320) and is hinged to the rotating shaft (321); the inner arc surface of the arc-shaped water spray block (322) is provided with a water spray groove (324) along its length direction and is connected to the inside of the hollow tube (304) through the water outlet hole (323); each water spray assembly (32) is located in the rectangular groove (320) as a whole when not deployed; under the action of centrifugal force, the arc-shaped water spray block (322) is deployed in the same direction, and the water inlet assembly (31) sprays water sequentially through the inside of the hollow tube (304), the water outlet hole (323) and the water spray groove (324) of the arc-shaped water spray block (322) onto the inner wall surface of the drum of the ball mill (1).

6. The cleaning mechanism for a ball mill according to claim 1, characterized in that: The water inlet assembly (31) comprises a plurality of third connecting rods (311), a connecting shaft (312), a circular sleeve (313), a water inlet pipe (316), a second motor (317) and a motor sleeve (318); a stop ring (315) is provided on the outer peripheral surface of an opening at one end of the hollow tube (304); an end surface of the connecting shaft (312) is coaxially connected to the outer peripheral surface of an opening at one end of the hollow tube (304) through each third connecting rod (311); a stop ring (315) is provided on the outer peripheral surface of the connecting shaft (312); trapezoidal rotation grooves (314) are provided on the inner side surfaces at both ends of the circular sleeve (313); and the circular sleeve (313) is respectively connected to the outer peripheral surface of the second motor (317) through the trapezoidal rotation grooves (314) at both ends. The sealing sleeve (314) is mounted on the water inlet pipe (316) and the limiting ring (315) of the connecting shaft (312), and each third connecting rod (311) is located inside the circular sleeve (313); the motor sleeve (318) is mounted on the sealing cover (303), the body of the second motor (317) is mounted on the motor sleeve (318), and the output shaft of the second motor (317) is horizontally and synchronously connected to the center of the other end surface of the connecting shaft (312) through a coupling; the interior of the circular sleeve (313) is connected to the external water tank through the water inlet pipe (316), and then the water passes through the water inlet pipe (316) and the circular sleeve (313) in sequence and then flows into the hollow tube (304).

7. The cleaning mechanism for a ball mill according to claim 1, characterized in that: The described bottom wall cleaning device (4) includes a telescopic assembly (41) and a plurality of cleaning assemblies (42). The telescopic assembly (41) includes a connecting plate (411) and a tapered block (413). The connecting plate (411) is integrally formed by a plurality of strip-shaped branch plates. Each strip-shaped branch plate is evenly spaced around the center of the connecting plate (411). The connecting plate (411) is a hollow structure. The center of one side surface of the connecting plate (411) is coaxially installed at the center of the other end of the hollow tube (304). A first circular groove (412) is opened at the center of the other side surface of the connecting plate (411). Second circular grooves (416) communicating with the first circular groove (412) are opened along the length direction of the center of each branch plate of the connecting plate (411). The tapered block (413) is coaxially and movably installed in the first circular groove (412) and the inclined surface is located inside the first circular groove (412). Rectangular sliding grooves (414) are opened along the length direction of the hollow tube (304) on the outer side surfaces of the bending positions at the center of the connecting plate (411). A plurality of U-shaped limiting rods (415) are evenly spaced along the circumferential direction on the side surface of the end with the largest diameter of the tapered block (413). The U-shaped side of each U-shaped limiting rod (415) is slidably installed in one of the rectangular sliding grooves (414). Each cleaning assembly (42) is slidably installed in the second circular groove (416) of each branch plate of the connecting plate (411) and the root end abuts against the inclined surface of the tapered block (413).

8. The cleaning mechanism for a ball mill according to claim 7, characterized in that: The described cleaning assembly (42) includes a fourth connecting rod (421), a trapezoidal adapter block (422), a sector-shaped cleaning plate (423), two rectangular support plates (424), two telescopic rods (425) and two springs (426). The fourth connecting rod (421) is slidably installed in the second circular groove (416) of the branch plate of the connecting plate (411). The trapezoidal adapter block (422) is installed at one end of the fourth connecting rod (421) and abuts against the inclined surface of the tapered block (413). The other end of the fourth connecting rod (421) is connected to the center of the inner ring of the sector-shaped cleaning plate (423). Two rectangular support plates (424) are symmetrically installed on the outer side surfaces of the branch plates of the connecting plate (411). Two telescopic rods (425) are respectively connected to both sides of the center of the inner ring of the two rectangular support plates (424) and the sector-shaped cleaning plate (423). The two telescopic rods (425) are parallel and spaced on both sides of the symmetry of the fourth connecting rod (421) and each is sleeved with a spring (426).

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