Automatically adjustable chemical raw material grinding device

Abstract

The invention relates to the technical field of chemical processing, in particular to a chemical raw material grinding device capable of being automatically adjusted. Comprising a rack and a grinding tank, a grinding cavity vertically penetrating through the grinding tank is formed in the grinding tank, a grinding column as high as the grinding tank is arranged in the grinding cavity, the diameter of the grinding column is smaller than the inner diameter of the grinding cavity, an upper sealing cover is arranged at the top end of the grinding tank, and a lower sealing box is arranged at the bottom of the grinding tank; the grinding column is inserted into the upper sealing cover through a connecting screw rod to keep the grinding column and the upper sealing cover on the same axis; a grinding column is arranged in the grinding cavity, an inner mounting hole extending in the radial direction of the grinding column is formed in the peripheral side of the top end of the grinding column, a laser distance measuring sensor is mounted in the inner mounting hole, and a driving unit is arranged on the rack. The large materials can be gradually ground into small particles in the grinding process, and the difficulty of directly grinding the large materials into the small particles with the standard size is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical processing, and specifically relates to a grinding device for chemical raw materials that can be automatically adjusted. Background Art

[0002] With the development of chemical synthesis technology, more and more chemically synthesized materials have emerged. These chemically synthesized materials often have good properties. During the manufacturing process of such synthetic materials, it is necessary to mix and heat multiple materials through reactions to produce the final product raw materials. Before the materials are mixed, in order to ensure that the materials can better mix and contact each other to obtain the best reaction degree and reaction speed, it is necessary to grind the materials through a grinding device according to different material grinding requirements.

[0003] Grinding devices usually have the function of adjusting the grinding accuracy, and most of the adjustment methods adopt the method of adjusting the gap between the grinding roller and the grinding disc. After the gap between the grinding roller and the grinding disc is fixed, larger materials will come into contact with the grinding roller first. It is difficult for the grinding roller to directly grind the larger materials into small particles of qualified size, and it is relatively complicated to adjust the gap between the grinding roller and the grinding disc each time. Summary of the Invention

[0004] In view of the above problems, it is necessary to provide a grinding device for chemical raw materials that can be automatically adjusted for the problems of the prior art.

[0005] To solve the problems of the prior art, the technical solution adopted by the present invention is: A grinding device for chemical raw materials that can be automatically adjusted, including a frame, and a grinding tank installed on the frame. The grinding tank is arranged vertically. A grinding cavity vertically penetrating the grinding tank is arranged inside the grinding tank. A grinding column with the same height as the grinding tank is arranged inside the grinding cavity. The diameter of the grinding column is smaller than the inner diameter of the grinding cavity. An upper cover is arranged at the top of the grinding tank, and a lower plugging box is arranged at the bottom of the grinding tank. The diameters of the upper cover and the lower plugging box are larger than the outer diameter of the grinding tank to block the upper and lower ends of the grinding cavity. A vertical connecting screw is arranged at the top of the grinding column, and a locking nut is spirally installed on the connecting screw. The grinding column is inserted on the upper cover through the connecting screw to keep the grinding column and the upper cover on the same axis; an inner installation hole extending radially along the grinding column is arranged on the circumferential side of the top of the grinding column, and a laser distance sensor is installed in the inner installation hole. The laser distance sensor detects the distance between the outer wall of the grinding column and the inner wall of the grinding cavity. A driving unit is arranged on the frame. The laser distance sensor is signal-connected to the driving unit through a controller. While the driving unit drives the grinding column and the upper cover to rotate around the axis of the grinding cavity, the outer wall of the grinding column gradually approaches the inside of the grinding cavity.

[0006] Preferably, a connecting seat is provided on the upper cover. The connecting seat is located on one side of the axis of the upper cover. A first hinge seat is provided on the connecting seat, and the axis of the first hinge seat is horizontally arranged perpendicular to the axis of the upper cover. The machine frame is provided with a top plate above the grinding tank. The driving unit includes a rotary driver fixedly installed on the top plate and a rotary seat rotatably installed on the top plate. The axis of the rotary seat is on the same straight line as the axis of the grinding tank. A spline shaft is coaxially arranged at the bottom of the rotary seat, and the spline shaft extends vertically downward. A spline sleeve is rotatably installed on the spline shaft. A second hinge seat is provided on the circumferential side of the spline sleeve, and the hinge axis of the second hinge seat is parallel to the axis of the first hinge seat. One end of a hinge arm is hinged at the second hinge seat, and the other end of the hinge arm is hinged to the first hinge seat. A connecting disk is coaxially arranged at the top of the spline sleeve, and the connecting disk is rotatably installed on the first lifting plate. The first lifting plate is slidably installed on the machine frame, and the first lifting plate is fixedly installed on the working end of the first linear driver. The first linear driver is fixedly installed on the top plate of the machine frame. The first linear driver drives the first lifting plate to drive the spline sleeve to move up and down along the axis of the spline shaft, and the hinge arm pushes the upper cover and the grinding column to move radially along the grinding tank.

[0007] Preferably, an extension cylinder is coaxially arranged below the spline sleeve. An outer sleeve is sleeved outside the extension cylinder. The extension cylinder and the outer sleeve are elastically connected by a first spring. The elastic force of the first spring makes the outer sleeve move downward to press the upper surface of the upper cover. A plurality of balls are rotatably installed on the bottom surface of the outer sleeve, and the balls are in contact with the surface of the upper cover.

[0008] Preferably, the inner diameter of the extension cylinder is larger than the outer diameter of the spline shaft.

[0009] Preferably, a positioning rod is slidably installed on the hinge arm. Plug rods are arranged on both sides of the bottom end of the positioning rod, and the axis of the plug rod is parallel to the axis of the second hinge seat. The plug rods are inserted into waist-shaped holes arranged on the surface of the hinge arm and extending along the length direction of the hinge arm. The width of the waist-shaped hole is equal to the diameter of the plug rod. The top end of the positioning rod is vertically inserted into a limiting hole arranged on the connecting disk. The limiting hole extends along the radial direction of the connecting disk. A positioning block is fixedly installed at one end of the limiting hole close to the axis of the connecting disk. A fitting block is arranged at the top end of the positioning rod and fits the upper surface of the connecting disk. When the fitting block fits the positioning block, the axes of the upper cover and the grinding column are on the same straight line as the axis of the grinding cavity.

[0010] Preferably, the driving unit further includes a lifting ring sleeved on the outer wall of the grinding tank. Side support feet are arranged on both sides of the lifting ring. First guide rods extending vertically upward are arranged on the side support feet. The first guide rods are inserted into the first lifting plate. A limiting head is arranged at the top end of the first guide rod, and the limiting head fits the upper side of the first lifting plate so that the lifting ring moves upward following the first lifting plate. When the lifting ring fits the bottom of the upper cover, it drives the upper cover to move upward to release the top opening of the grinding cavity.

[0011] Preferably, a first avoidance hole with an upward opening is provided at the axis of the grinding column, and a second avoidance hole is provided at the axis of the upper cover. The inner diameters of the first avoidance hole and the second avoidance hole are larger than the diameter of the spline shaft.

[0012] Preferably, a base is provided below the grinding tank on the frame. A guide sleeve is provided on the base and is in the same straight line as the grinding tank. A plug column is coaxially arranged inside the guide sleeve. The outer diameter of the plug column is the same as the outer diameter of the grinding column. An inner shaft hole with a downward opening is provided at the axis of the plug column. A second spring is arranged inside the inner shaft hole. The second spring elastically connects the plug column and the base. The elastic force of the second spring moves the plug column upward to fit the bottom of the grinding column.

[0013] Preferably, the lower plugging box is in a ring shape. The inner wall of the lower plugging box fits the outer wall of the plug column. Two vertically downward extending second guide rods are provided on both sides of the lower plugging box. The second guide rods are inserted into the base. The end of the second guide rod away from the lower plugging box is fixedly connected to a second lifting plate arranged below the base. A second linear driver is fixedly installed on the base. The working end of the second linear driver is fixedly connected to the second lifting plate. The second linear driver drives the second lifting plate and the lower plugging box to move in the vertical direction.

[0014] Preferably, a side baffle surrounding the circumference of the lower plugging box is provided on the upper side of the lower plugging box. A slot matching the side baffle is provided at the bottom of the grinding cavity.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: First, by precisely controlling the change of the gap between the grinding column and the inner wall of the grinding cavity, the present invention can gradually grind larger materials into small particles during the grinding process, reducing the difficulty of directly grinding larger materials into small particles of qualified size. The grinding column and the upper cover rotate around the axis of the grinding cavity, enabling the materials to be more evenly subjected to the grinding force during the grinding process, and avoiding the problems of excessive or insufficient local grinding.

[0016] Second, the present invention uses a laser distance sensor to detect the distance between the outer wall of the grinding column and the inner wall of the grinding cavity in real time, and feeds the data back to the controller. The controller then controls the drive unit to adjust the gap between the grinding column and the inner wall of the grinding cavity, realizing the automatic adjustment of the grinding accuracy. This automatic adjustment method avoids the cumbersome process of manually adjusting the gap every time in the traditional adjustment method, and improves the accuracy and efficiency of the adjustment.

[0017] Third, by arranging the plug column to fit the bottom of the grinding column and move up and down with the grinding column, the present invention effectively confines the materials entering the grinding cavity to the annular area between the outer wall of the grinding column and the inner wall of the grinding cavity. It ensures that the materials are always in the grinding position during the whole grinding process, improving the grinding efficiency and quality. Description of the Drawings

[0018] Figure 1 It is a perspective view of a chemical raw material grinding device with automatic adjustment; Figure 2 It is a side view of a chemical raw material grinding device with automatic adjustment; Figure 3 It is a cross-sectional view taken along A-A of a chemical raw material grinding device with automatic adjustment in the feeding state Figure 2 at the position indicated; Figure 4 It is Figure 3 a partial enlarged view at position B; Figure 5 It is a cross-sectional view taken along A-A of a chemical raw material grinding device with automatic adjustment in the grinding state Figure 2 at the position indicated; Figure 6 It is Figure 5 a partial enlarged view at position C; Figure 7 It is a perspective view of a chemical raw material grinding device with automatic adjustment in the discharging state Figure 1 ; Figure 8 It is Figure 7 a perspective cross-sectional view; Figure 9 It is Figure 8 a partial enlarged view at position D; Figure 10 It is a perspective view of a chemical raw material grinding device with automatic adjustment in the discharging state Figure 2 .

[0019] The reference numerals in the figure are: 1, frame; 11, top plate; 12, base; 121, guide sleeve; 122, plugging column; 123, inner shaft hole; 124, second spring; 2, grinding tank; 21, grinding chamber; 211, slot; 22, grinding column; 221, connecting screw; 222, locking nut; 223, inner mounting hole; 224, laser distance sensor; 225, first avoidance hole; 23, upper cover; 231, connecting seat; 232, first hinge seat; 233, second avoidance hole; 24, lower plugging box; 241, second guide rod; 242, second lifting plate; 243, second linear driver; 244, side baffle; 3, drive unit; 31, rotary driver; 311, rotary seat; 312, spline shaft; 32, spline sleeve; 321, second hinge seat; 322, connecting plate; 323, extended cylinder; 324, outer sleeve; 325, first spring; 326, ball; 327, limit hole; 328, positioning block; 33, hinge arm; 331, positioning rod; 332, plug rod; 333, kidney-shaped hole; 334, fitting block; 34, first lifting plate; 341, first linear driver; 35, lifting ring; 351, side support leg; 352, first guide rod; 353, limit head. Detailed implementation manners

[0020] In order to further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0021] Refer to Figures 1 to 10 : An automatically adjustable chemical raw material grinding device, comprising a frame 1 and a grinding tank 2 installed on the frame 1. The grinding tank 2 is vertically arranged. A grinding cavity 21 vertically penetrating the grinding tank 2 is arranged inside the grinding tank 2. A grinding column 22 equal in height to the grinding tank 2 is arranged inside the grinding cavity 21. The diameter of the grinding column 22 is smaller than the inner diameter of the grinding cavity 21. An upper cover 23 is arranged at the top of the grinding tank 2, and a lower plugging box 24 is arranged at the bottom of the grinding tank 2. The diameters of the upper cover 23 and the lower plugging box 24 are larger than the outer diameter of the grinding tank 2 so as to block the upper and lower ends of the grinding cavity 21. A vertical connecting screw 221 is arranged at the top of the grinding column 22, and a locking nut 222 is spirally installed on the connecting screw 221. The grinding column 22 is inserted on the upper cover 23 through the connecting screw 221 to keep the grinding column 22 and the upper cover 23 on the same axis; an inner installation hole 223 extending radially along the grinding column 22 is arranged on the circumferential side of the top of the grinding column 22. A laser distance sensor 224 is installed inside the inner installation hole 223. The laser distance sensor 224 detects the distance between the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21. A driving unit 3 is arranged on the frame 1. The laser distance sensor 224 is signal-connected to the driving unit 3 through a controller. While driving the grinding column 22 and the upper cover 23 to rotate around the axis of the grinding cavity 21, the driving unit 3 gradually makes the outer wall of the grinding column 22 approach the inside of the grinding cavity 21.

[0022] When the present invention is in use, the staff adds the chemical raw materials to be ground into the grinding chamber 21 from the top opening of the grinding tank 2. At this time, the grinding column 22 is located at the center of the grinding chamber 21, and the lower sealing box 24 seals the lower end of the grinding chamber 21 respectively to prevent material leakage. The grinding column 22 is fixed on the upper cover 23 through the connecting screw 221 and the locking nut 222. The laser distance sensor 224 installed in the inner mounting hole 223 on the circumferential side of the top end of the grinding column 22 starts to work, and the distance between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21 is detected in real time, and the detected data is transmitted to the controller. The controller sends an instruction to the driving unit 3 according to the data fed back by the laser distance sensor 224. The driving unit 3 starts to work, driving the grinding column 22 and the upper cover 23 to rotate around the axis of the grinding chamber 21. During the rotation, the driving unit 3 simultaneously makes the outer wall of the grinding column 22 gradually approach the inner wall of the grinding chamber 21, thereby reducing the gap between the two until the distance between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21 reaches the minimum gap set by the staff. As the grinding column 22 rotates and the gap with the inner wall of the grinding chamber 21 decreases, the chemical raw materials added to the grinding chamber 21 and located on the side where the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21 are relatively close are subjected to forces such as extrusion, friction, and shear between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21, and are gradually ground into smaller particles, and the size of the particles is the distance between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21. The materials in the space with a larger distance on the other side are re-spread under the action of gravity and wait for the moving grinding column 22 to crush them again. When the materials reach the preset grinding accuracy for a period of time, the driving unit 3 stops working and the grinding process ends. At this time, the lower sealing box 24 can be opened to take out the ground materials from the grinding chamber 21. In this embodiment, the laser distance sensor 224 detects the distance between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21 in real time, and feeds the data back to the controller, and the controller then controls the driving unit 3 to adjust the gap between the grinding column 22 and the inner wall of the grinding chamber 21, realizing the automatic adjustment of the grinding accuracy. This automatic adjustment method avoids the cumbersome process of manually adjusting the gap every time in the traditional adjustment method, and improves the accuracy and efficiency of the adjustment. In this embodiment, since the grinding column 22 and the upper cover 23 rotate around the axis of the grinding chamber 21, the materials can be more evenly subjected to the grinding force during the grinding process, avoiding the problems of excessive or insufficient local grinding. At the same time, by precisely controlling the gap between the grinding column 22 and the inner wall of the grinding chamber 21, larger materials can be gradually ground into small particles during the grinding process, reducing the difficulty of directly grinding larger materials into small particles of qualified size, and improving the grinding efficiency and quality.

[0023] In order to solve the problem of how the driving unit 3 drives the grinding column 22 and the upper cover 23 to approach the inner wall of the grinding chamber 21 while rotating, the following features are specifically set: A connecting seat 231 is provided on the upper cover 23. The connecting seat 231 is located on one side of the axis of the upper cover 23. A first hinge seat 232 is provided on the connecting seat 231. The axis of the first hinge seat 232 is horizontally arranged perpendicular to the axis of the upper cover 23. The machine frame 1 is provided with a top plate 11 above the grinding tank 2. The driving unit 3 includes a rotary driver 31 fixedly installed on the top plate 11 and a rotary seat 311 rotatably installed on the top plate 11. The axis of the rotary seat 311 is on the same straight line as the axis of the grinding tank 2. A spline shaft 312 is coaxially arranged at the bottom of the rotary seat 311. The spline shaft 312 extends vertically downward. A spline sleeve 32 is rotatably installed on the spline shaft 312. A second hinge seat 321 is provided on the circumferential side of the spline sleeve 32. The hinge axis of the second hinge seat 321 is parallel to the axis of the first hinge seat 232. One end of a hinge arm 33 is hinged at the second hinge seat 321, and the other end of the hinge arm 33 is hinged to the first hinge seat 232. A connecting disk 322 is coaxially arranged at the top of the spline sleeve 32. The connecting disk 322 is rotatably installed on the first lifting plate 34. The first lifting plate 34 is slidably installed on the machine frame 1. The first lifting plate 34 is fixedly installed on the working end of a first linear driver 341. The first linear driver 341 is fixedly installed on the top plate 11 of the machine frame 1. The first linear driver 341 drives the first lifting plate 34 to drive the spline sleeve 32 to move up and down along the axis of the spline shaft 312, and the hinge arm 33 pushes the upper cover 23 and the grinding column 22 to move radially along the grinding tank 2.

[0024] In this embodiment, the rotary driver 31 of the driving unit 3 can be a servo motor. When the rotary driver 31 is started, it drives the rotary seat 311 to rotate around its axis. Since the spline shaft 312 is coaxially arranged at the bottom of the rotary seat 311, the spline shaft 312 rotates accordingly. The spline sleeve 32 is in spline fit with the spline shaft 312, and the rotation of the spline shaft 312 drives the spline sleeve 32 to rotate. Because the second hinge seat 321 on the circumferential side of the spline sleeve 32 is hinged to the first hinge seat 232 on the upper cover 23 through the hinge arm 33, the rotation of the spline sleeve 32 drives the upper cover 23 and the grinding column 22 to rotate around the axis of the grinding cavity 21 through the hinge arm 33. When it is necessary to make the grinding column 22 approach the inner wall of the grinding cavity 21 to further grind the material, the first linear driver 341 operates to drive the first lifting plate 34 to descend along the axis of the spline shaft 312. Since the spline sleeve 32 is rotatably mounted on the first lifting plate 34 through the connecting disk 322, the spline sleeve 32 descends with the first lifting plate 34. When the spline sleeve 32 descends, it pushes the upper cover 23 and the grinding column 22 to move radially towards the inner wall of the grinding cavity 21 along the grinding tank 2, thereby reducing the distance between the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21. The laser distance sensor 224 continuously detects the distance between the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21 and transmits the data to the controller to adjust the grinding accuracy and further grind and refine the material. When the distance between the grinding column 22 and the inner wall of the grinding cavity 21 reaches the set value, the controller sends an instruction to the first linear driver 341, and the working end of the first linear driver 341 stops moving. Until the grinding process ends, the lower plugging box 24 can be opened to take out the ground material from the grinding cavity 21. The first linear driver 341 can be a cylinder, an oil cylinder or an electric push rod, etc. Through the coordinated operation of the ingeniously designed components such as the rotary driver 31, the rotary seat 311, the spline shaft 312, the spline sleeve 32, the hinge arm 33, the first lifting plate 34 and the first linear driver 341 in this embodiment, the compound movement that the grinding column 22 and the upper cover 23 rotate around the axis of the grinding cavity 21 for grinding while approaching the inner wall of the grinding cavity 21 along the radial direction of the grinding tank 2 to adjust the grinding accuracy is successfully achieved. This compound movement mode can grind the material more effectively and improve the grinding efficiency and quality.

[0025] In order to ensure that the upper cover 23 fits and plugs the opening above the grinding tank 2 during the entire grinding process, the following features are specifically set: A lengthened cylinder 323 is coaxially arranged below the spline sleeve 32. An outer sleeve 324 is sleeved outside the lengthened cylinder 323. The lengthened cylinder 323 and the outer sleeve 324 are elastically connected by a first spring 325. The elastic force of the first spring 325 makes the outer sleeve 324 move downward to press the upper surface of the upper cover 23; several balls 326 are rotatably mounted on the bottom surface of the outer sleeve 324, and the balls 326 are in contact with the surface of the upper cover 23.

[0026] In this embodiment, the spline sleeve 32 is driven by the first linear driver 341 to move up and down along the axis of the spline shaft 312. Since the extension cylinder 323 is coaxially arranged and fixedly connected with the spline sleeve 32, the extension cylinder 323 will move together with the spline sleeve 32. Under the action of the elastic force of the first spring 325, the outer sleeve 324 always has a tendency to move downward, thereby pressing the upper surface of the upper cover 23 so that the upper cover 23 fits tightly over the upper opening of the grinding tank 2. A plurality of balls 326 rotatably mounted on the bottom surface of the outer sleeve 324 always fit on the surface of the upper cover 23. When the grinding column 22 and the upper cover 23 move radially along the grinding tank 2 under the push of the hinge arm 33, the balls 326 can roll on the surface of the upper cover 23, reducing the friction between the outer sleeve 324 and the upper cover 23, ensuring that the upper cover 23 can move smoothly, and at the same time better maintaining the pressing action on the upper cover 23, so that the upper cover 23 can closely fit over the upper opening of the grinding tank 2, effectively preventing the leakage of chemical raw materials during the grinding process, ensuring the sealing of the grinding environment, being beneficial to improving the grinding effect and product quality, and at the same time avoiding the pollution of chemical raw materials to the environment and the harm to the operators.

[0027] In order to prevent the extension cylinder 323 and the outer sleeve 324 from affecting the rotation of the spline shaft 312, the following features are specifically set: The inner diameter of the extension cylinder 323 is larger than the outer diameter of the spline shaft 312.

[0028] In this embodiment, since the inner diameter of the extension cylinder 323 is larger than the outer diameter of the spline shaft 312, the extension cylinder 323 and the outer sleeve 324 cannot contact the spline shaft 312 at any height, thereby avoiding affecting the rotation of the spline shaft 312.

[0029] In order to ensure that when the spline sleeve 32 moves up to the highest position, the axes of the upper cover 23 and the grinding column 22 are collinear with the grinding chamber 21, the following features are specifically set: A positioning rod 331 is slidably mounted on the hinge arm 33. Two sides of the bottom end of the positioning rod 331 are provided with insertion rods 332. The axis of the insertion rod 332 is parallel to the axis of the second hinge seat 321. The insertion rod 332 is inserted into a kidney-shaped hole 333 provided on the surface of the hinge arm 33 and extending along the length direction of the hinge arm 33. The width of the kidney-shaped hole 333 is equal to the diameter of the insertion rod 332; the top end of the positioning rod 331 is vertically inserted into a limit hole 327 provided on the connection disk 322. The limit hole 327 extends radially along the connection disk 322. A positioning block 328 is fixedly mounted at one end of the limit hole 327 close to the axis of the connection disk 322. A fitting block 334 that fits the upper surface of the connection disk 322 is provided at the top end of the positioning rod 331. When the fitting block 334 fits the positioning block 328, the axes of the upper cover 23 and the grinding column 22 are collinear with the axis of the grinding chamber 21.

[0030] In this embodiment, when the spline sleeve 32 moves upward under the drive of the first linear driver 341, the connecting plate 322, as a component connected to the spline sleeve 32, also rises synchronously. Since the top end of the positioning rod 331 is vertically inserted into the limiting hole 327 of the connecting plate 322, the positioning rod 331 will rise together with the connecting plate 322. During the rising process, the inserting rod 332 slides in the kidney-shaped hole 333. The kidney-shaped hole 333 allows the positioning rod 331 to adjust its position within a certain range along the length direction of the hinge arm 33 when rising with the spline sleeve 32, while restricting its offset in other directions. When the spline sleeve 32 moves upward, the fitting block 334 moves in the limiting hole 327 towards the positioning block 328. When the fitting block 334 fits with the positioning block 328, it can ensure that the upper cover 23 and the grinding column 22 are in the process of the spline sleeve 32 rising, and restrict the hinge arm 33 from further flipping, ensuring that the axes of the upper cover 23 and the grinding column 22 are kept on the same straight line as the axis of the grinding cavity 21, which is convenient for subsequent feeding and discharging.

[0031] In order to drive the upper cover 23 to move upward to release the opening above the grinding cavity 21 after the axes of the upper cover 23 and the grinding column 22 are aligned with the axis of the grinding cavity 21, the following features are specifically set: The driving unit 3 further includes a lifting ring 35 sleeved on the outer wall of the grinding tank 2. Side support feet 351 are arranged on both sides of the lifting ring 35. A first guiding rod 352 extending vertically upward is arranged on the side support feet 351. The first guiding rod 352 is inserted into the first lifting plate 34. A limiting head 353 is arranged at the top end of the first guiding rod 352. The limiting head 353 fits against the upper side of the first lifting plate 34 to make the lifting ring 35 move upward following the first lifting plate 34. When the lifting ring 35 fits against the bottom of the upper cover 23, it drives the upper cover 23 to move upward to release the top opening of the grinding cavity 21.

[0032] When this embodiment is in the grinding state, the lifting ring 35 is sleeved on the outer wall of the grinding tank 2, and the first guide rods 352 on the side support feet 351 on both sides of it have been inserted on the first lifting frame plate 34. The limit head 353 is located at the top of the first guide rod 352 and fits against the upper side of the first lifting frame plate 34. At this time, the upper cover 23 tightly seals the top opening of the grinding cavity 21, and the lifting ring 35 is in a lower position. When it is necessary to open the top opening of the grinding cavity 21, the first linear actuator 341 starts to work, driving the first lifting frame plate 34 and the spline sleeve 32 to move upward until the upper cover 23 and the grinding column 22 are reset to a position where their axes are collinear with the axis of the grinding cavity 21. Subsequently, when the upper surface of the lifting ring 35 fits against the bottom of the upper cover 23, the continuously rising lifting ring 35 will exert an upward thrust on the upper cover 23. Since the upper cover 23 and the grinding column 22 are connected by structures such as connecting screws 221, the upper cover 23 moves upward under the push of the lifting ring 35, gradually releasing the top opening of the grinding cavity 21 for subsequent operations. In this embodiment, only by controlling the first linear actuator 341 and using existing structures such as the first lifting frame plate 34 and the first guide rod 352, the upper cover 23 can be easily driven to move upward to open the top opening of the grinding cavity 21. There is no need for additional complex operations or a separate drive mechanism to control the opening of the upper cover 23.

[0033] To solve the problem of how to prevent the upper cover 23 and the grinding column 22 from moving upward and contacting the spline shaft 312, the following features are specifically set: A first avoidance hole 225 with an upward opening is provided at the axis of the grinding column 22, and a second avoidance hole 233 is provided at the axis of the upper cover 23. The inner diameters of the first avoidance hole 225 and the second avoidance hole 233 are larger than the diameter of the spline shaft 312.

[0034] In this embodiment, when it is necessary to open the top opening of the grinding cavity 21, the first linear actuator 341 drives the first lifting frame plate 34 to rise, driving a series of components such as the spline sleeve 32 and the articulated arm 33 to move, so that the upper cover 23 and the grinding column 22 move upward. Before this upward movement, the axes of the upper cover 23 and the grinding column 22 are already collinear with the axis of the grinding cavity 21, and the spline shaft 312 maintains its own rotation state. Due to the existence of the first avoidance hole 225 and the second avoidance hole 233 and their large enough inner diameters, the upper cover 23 and the grinding column 22 can move upward smoothly, and the spline shaft 312 can pass through the first avoidance hole 225 and the second avoidance hole 233, avoiding the collision and contact between the upper cover 23 and the grinding column 22 and the spline shaft 312, ensuring the smooth progress of the upward movement, and providing safety guarantee for the operation of opening the top opening of the grinding cavity 21.

[0035] To ensure that even when the grinding column 22 moves upward, the material entering the grinding chamber 21 remains in the position between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21 waiting to be ground, the following features are specifically set: The frame 1 is provided with a base 12 below the grinding tank 2. A guide sleeve 121 is arranged on the base 12 and is on the same straight line as the grinding tank 2. A plugging column 122 is coaxially arranged in the guide sleeve 121. The outer diameter of the plugging column 122 is the same as the outer diameter of the grinding column 22. An inner shaft hole 123 with an opening downward is arranged at the axis of the plugging column 122. A second spring 124 is arranged in the inner shaft hole 123. The second spring 124 elastically connects the plugging column 122 and the base 12. The elastic force of the second spring 124 causes the plugging column 122 to move upward to fit the bottom of the grinding column 22.

[0036] In this embodiment, before the operation of opening the cover and loading materials, the axes of the upper cover 23 and the grinding column 22 are already on the same straight line as the axis of the grinding chamber 21. Therefore, the axes of the grinding column 22 and the plugging column 122 are on the same straight line. When the first linear driver 341 drives the first lifting plate 34 to rise, driving the upper cover 23 and the grinding column 22 to move upward, the plugging column 122 will synchronously move upward with the upward movement of the grinding column 22 under the elastic force of the second spring 124. The material enters from the upper opening of the grinding chamber 21. Since the plugging column 122 closely fits the bottom of the grinding column 22, and the lower plugging box 24 cooperates with the plugging column 122 to block the bottom opening of the grinding chamber 21, the material will not fall from the lower opening of the grinding chamber 21, but naturally accumulates in the annular space between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21, ensuring that the material is in the predetermined waiting grinding position and preparing for the subsequent grinding work. In this embodiment, by setting the plugging column 122 to fit the bottom of the grinding column 22 and move up and down with the grinding column 22, the material entering the grinding chamber 21 is effectively limited in the annular area between the outer wall of the grinding column 22 and the inner wall of the grinding chamber 21. It ensures that the material is always in the grinding position throughout the grinding process, improving the grinding efficiency and grinding quality.

[0037] To solve the problem of how to release the bottom opening of the grinding chamber 21 for discharging materials, the following features are specifically set: The lower plugging box 24 is in a circular ring shape. The inner wall of the lower plugging box 24 fits the outer wall of the plugging column 122. Two vertical downward extending second guide rods 241 are arranged on both sides of the lower plugging box 24. The second guide rods 241 are inserted into the base 12. The end of the second guide rod 241 far from the lower plugging box 24 is fixedly connected to a second lifting plate 242 arranged below the base 12. A second linear driver 243 is fixedly installed on the base 12. The working end of the second linear driver 243 is fixedly connected to the second lifting plate 242. The second linear driver 243 drives the second lifting plate 242 and the lower plugging box 24 to move in the vertical direction.

[0038] On the upper side of the lower plugging box 24, there is a side baffle 244 surrounding the circumferential side of the lower plugging box 24, and at the bottom of the grinding cavity 21, there is a slot 211 matching the side baffle 244.

[0039] In this embodiment, the lower plugging box 24 is circular ring-shaped, and its inner wall closely fits the outer wall of the plugging column 122, closing the bottom opening of the grinding cavity 21. The side baffle 244 on the upper side of the lower plugging box 24 is embedded in the slot 211 at the bottom of the grinding cavity 21, further enhancing the closing effect and ensuring that the material is fully ground in the grinding cavity 21 without leaking from the bottom opening. When it is necessary to discharge the material after grinding is completed, the second linear driver 243 is activated. The second linear driver 243 can be a cylinder, an oil cylinder, an electric push rod, etc. When the second linear driver 243 works, it pushes the second lifting plate 242 to move downward. The lower plugging box 24 will move downward synchronously with the second lifting plate 242. During this process, the side baffle 244 gradually disengages from the slot 211, and the bottom opening of the grinding cavity 21 is completely released. At this time, the ground material falls downward through the bottom opening of the grinding cavity 21 under the action of gravity, realizing the discharging operation.

[0040] Working principle: During use, the staff adds the chemical raw materials to be ground into the grinding cavity 21 from the top opening of the grinding tank 2. At this time, the grinding column 22 is located at the center of the grinding cavity 21, and the lower plugging box 24 plugs the lower end of the grinding cavity 21 respectively. The laser distance sensor 224 installed in the inner mounting hole 223 on the circumferential side of the top end of the grinding column 22 starts to work, and in real time detects the distance between the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21. The driving unit 3 starts to work, driving the grinding column 22 and the upper cover 23 to rotate around the axis of the grinding cavity 21. During the rotation process, the driving unit 3 simultaneously makes the outer wall of the grinding column 22 gradually approach the inner wall of the grinding cavity 21, thereby reducing the gap between the two until the distance between the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21 reaches the minimum gap set by the staff. With the rotation of the grinding column 22 and the reduction of the gap between its outer wall and the inner wall of the grinding cavity 21, the chemical raw materials added to the grinding cavity 21 and located on the side where the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21 are relatively close are subjected to forces such as extrusion, friction, and shear between the outer wall of the grinding column 22 and the inner wall of the grinding cavity 21, and are gradually ground into smaller particles. When the material reaches the preset grinding accuracy for a period of time, the driving unit 3 stops working, and the grinding process ends. At this time, the lower plugging box 24 can be opened to take out the ground material from the grinding cavity 21.

[0041] The above embodiments merely represent one or several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. An automatically adjustable chemical raw material grinding device, comprising a frame and a grinding tank mounted on the frame, characterized in that, The grinding tank is vertically arranged. A grinding cavity vertically penetrating the grinding tank is arranged inside the grinding tank. A grinding column with the same height as the grinding tank is arranged inside the grinding cavity. The diameter of the grinding column is smaller than the inner diameter of the grinding cavity. An upper cover is arranged at the top of the grinding tank, and a lower plugging box is arranged at the bottom of the grinding tank. The diameters of the upper cover and the lower plugging box are larger than the outer diameter of the grinding tank so as to plug the upper and lower ends of the grinding cavity. A vertical connecting screw rod is arranged at the top of the grinding column, and a locking nut is spirally installed on the connecting screw rod. The grinding column is inserted on the upper cover through the connecting screw rod to keep the grinding column and the upper cover on the same axis; An inner installation hole extending radially along the grinding column is arranged on the circumferential side at the top of the grinding column. A laser distance sensor is installed in the inner installation hole. The laser distance sensor detects the distance between the outer wall of the grinding column and the inner wall of the grinding cavity. A driving unit is arranged on the frame. The laser distance sensor is signal-connected to the driving unit through a controller. While driving the grinding column and the upper cover to rotate around the axis of the grinding cavity, the driving unit makes the outer wall of the grinding column gradually approach the inside of the grinding cavity.

2. The automated adjustable chemical raw material grinding device according to claim 1, characterized in that, A connecting seat is arranged on the upper cover. The connecting seat is located on one side of the axis of the upper cover. A first hinge seat is arranged on the connecting seat. The axis of the first hinge seat is horizontally arranged perpendicular to the axis of the upper cover; A top plate is arranged on the frame above the grinding tank. The driving unit includes a rotary driver fixedly installed on the top plate and a rotary seat rotatably installed on the top plate. The axis of the rotary seat is on the same straight line as the axis of the grinding tank. A spline shaft is coaxially arranged at the bottom of the rotary seat. The spline shaft extends vertically downward. A spline sleeve is rotatably installed on the spline shaft. A second hinge seat is arranged on the circumferential side of the spline sleeve. The hinge axis of the second hinge seat is parallel to the axis of the first hinge seat. One end of a hinge arm is hinged at the second hinge seat, and the other end of the hinge arm is hinged to the first hinge seat; A connecting disk is coaxially arranged at the top of the spline sleeve. The connecting disk is rotatably installed on a first lifting plate. The first lifting plate is slidably installed on the frame. The first lifting plate is fixedly installed on the working end of a first linear driver. The first linear driver is fixedly installed on the top plate of the frame. The first linear driver drives the first lifting plate to drive the spline sleeve to lift along the axis of the spline shaft, and the hinge arm pushes the upper cover and the grinding column to move radially along the grinding tank.

3. An automated adjustable chemical raw material grinding device according to claim 2, characterized in that, An extension cylinder is coaxially arranged below the spline sleeve. An outer sleeve is sleeved outside the extension cylinder. The extension cylinder and the outer sleeve are elastically connected by a first spring. The elastic force of the first spring makes the outer sleeve move downward to press the upper surface of the upper cover; A plurality of balls are rotatably installed on the bottom surface of the outer sleeve. The balls are in contact with the surface of the upper cover.

4. An automated adjustable chemical raw material grinding device according to claim 3, characterized in that, The inner diameter of the extension cylinder is larger than the outer diameter of the spline shaft.

5. The automated adjustable chemical raw material grinding device according to claim 2, characterized in that, A positioning rod is slidably installed on the hinge arm. Plug rods are arranged on both sides of the bottom end of the positioning rod. The axis of the plug rod is parallel to the axis of the second hinge seat. The plug rod is inserted into a waist-shaped hole arranged on the surface of the hinge arm and extending along the length direction of the hinge arm. The width of the waist-shaped hole is equal to the diameter of the plug rod; The top end of the positioning rod is vertically inserted into the limiting hole provided on the connecting plate. The limiting hole extends along the radial direction of the connecting plate. A positioning block is fixedly installed at one end of the limiting hole close to the axis of the connecting plate. A fitting block that fits the upper surface of the connecting plate is provided at the top end of the positioning rod. When the fitting block fits the positioning block, the axes of the upper cover and the grinding column are collinear with the axis of the grinding cavity.

6. The automated adjustable chemical raw material grinding device according to claim 2, wherein The driving unit further includes a lifting ring sleeved on the outer wall of the grinding tank. Side support feet are provided on both sides of the lifting ring. First guiding rods extending vertically upward are provided on the side support feet. The first guiding rods are inserted into the first lifting plate. A limiting head is provided at the top end of the first guiding rod. The limiting head fits the upper side of the first lifting plate so that the lifting ring moves upward following the first lifting plate. When the lifting ring fits the bottom of the upper cover, it drives the upper cover to move upward to release the top opening of the grinding cavity.

7. An automated adjustable chemical raw material grinding device according to claim 6, characterized in that, A first avoidance hole with an upward opening is provided at the axis of the grinding column. A second avoidance hole is provided at the axis of the upper cover. The inner diameters of the first avoidance hole and the second avoidance hole are larger than the diameter of the spline shaft.

8. An automated adjustable chemical raw material grinding device according to claim 6, characterized in that, A base is provided below the grinding tank on the frame. A guiding sleeve coaxial with the grinding tank is provided on the base. A plugging column is coaxially arranged inside the guiding sleeve. The outer diameter of the plugging column is the same as the outer diameter of the grinding column. An inner shaft hole with a downward opening is provided at the axis of the plugging column. A second spring is arranged inside the inner shaft hole. The second spring elastically connects the plugging column and the base. The elastic force of the second spring makes the plugging column move upward to fit the bottom of the grinding column.

9. An automated adjustable chemical raw material grinding device according to claim 8, characterized in that, The lower plugging box is in a circular ring shape. The inner wall of the lower plugging box fits the outer wall of the plugging column. Second guiding rods extending vertically downward are provided on both sides of the lower plugging box. The second guiding rods are inserted into the base. One end of the second guiding rod far from the lower plugging box is fixedly connected to a second lifting plate arranged below the base. A second linear driver is fixedly installed on the base. The working end of the second linear driver is fixedly connected to the second lifting plate. The second linear driver drives the second lifting plate and the lower plugging box to move in the vertical direction.

10. An automated adjustable chemical raw material grinding device according to claim 9, characterized in that, A side baffle surrounding the circumference of the lower plugging box is provided on the upper side of the lower plugging box. A slot matching the side baffle is provided at the bottom of the grinding cavity.

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