Self-regulating Raymond grinder scraper knife structure

Abstract

The invention provides a self-regulating Raymond grinder scraper knife structure which comprises a mounting frame and a scraper knife body, the mounting frame comprises a first mounting part and a second mounting part which are connected with each other, the first mounting part is connected with the bottom of a grinding roller mounting frame of a grinder, and the second mounting part is connected with the scraper knife body. The scraper knife body is made to be tightly attached to the grinding ring, the scraper knife body is of a vertical plate-shaped structure, and the scraper knife body is movably connected with the second installation part so that the scraper knife body can rotate within a certain range in the vertical direction; an adjusting assembly and a transmission assembly are further arranged on the mounting frame, and the adjusting assembly is in driving connection with the scraper knife body through the transmission assembly, so that the adjusting assembly can adjust the vertical rotating state of the scraper knife body according to the rotating speed of the adjusting assembly. The height of the bottom end of the scraper knife can be adjusted according to different working conditions of the grinding machine, abrasion of the scraper knife is reduced as much as possible while sufficient powder is shoveled, the frequency of maintenance and replacement is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinding equipment, in particular to a self-regulating Raymond grinder blade structure. Background Art

[0002] Raymond mill is the most common large-scale grinding equipment for fine powders. It is widely used in the fine powder processing of more than 280 materials in the mining, chemical, construction and other industries with a Mohs hardness of no more than 9.3 and a humidity of less than 6% such as barite, calcite, potassium feldspar, talc, marble, limestone, dolomite, fluorite, lime, activated clay, activated carbon, bentonite, kaolin, cement, phosphate rock, gypsum, glass, thermal insulation materials, etc. The finished particle size of the Raymond mill can be adjusted arbitrarily within the range of 80-325 mesh, and some materials can reach up to 600 mesh.

[0003] The Raymond mill primarily consists of a main unit, analyzer, fan, finished product cyclone separator, fine powder cyclone separator, and air duct. The main unit comprises a drive motor, frame, air inlet volute, scraper, grinding roller, grinding ring, and housing. During operation, material to be crushed is fed into the mill through a feed hopper on the side of the housing. The grinding roller, suspended from the main unit's plum blossom frame, revolves around its vertical axis while simultaneously rotating. Centrifugal force causes the grinding roller to swing outward, pressing against the grinding ring. The scraper, mounted at the bottom of the grinding roller, scoops up the material and delivers it between the grinding roller and the grinding ring. The rolling action of the grinding roller crushes the material.

[0004] However, there are still some problems with the current scraper structure, that is, the scraper body is a fixed structure, and the height of the powder accumulated on the edge of the grinding ring inside the main machine changes with the speed of the drive motor. Figure 1a It can be seen that when the driving motor rotates faster, the centrifugal force on the internal powder is greater, so it moves more toward the grinding ring, and accumulates higher along the inner wall of the grinding ring; Figure 1b It can be seen that when the drive motor rotates at a slow speed, the centrifugal force on the powder inside is smaller, causing it to move more slowly toward the grinding ring and, consequently, to accumulate lower along the inner wall of the grinding ring. When faced with different speeds under different operating conditions, if the bottom of the scraper is set lower, its overall height will be higher, the contact surface with the grinding ring will be larger, and it will be more susceptible to wear. If the bottom of the scraper is set higher, it may not be able to properly contact the lower accumulation of powder at low speeds, resulting in limited scooped powder and poor feeding effect. Therefore, a structure that can adjust the bottom position of the scraper to adapt to different grinding conditions is needed. Summary of the Invention

[0005] In response to the deficiencies in the prior art, the present invention provides a self-regulating Raymond grinder blade structure, which solves the problem in the prior art that the bottom end position of the blade cannot be adjusted with the rotation of the drive motor, resulting in either rapid blade wear or less shoveled powder.

[0006] According to an embodiment of the present invention, a self-regulating blade structure for a Raymond mill grinder includes a mounting frame and a blade body. The mounting frame includes a first mounting member and a second mounting member connected to each other, wherein the first mounting member is connected to the bottom of the grinding roller mounting frame of the grinder, and the second mounting member is connected to the blade body so that the blade body is closely attached to the grinding ring. The blade body is a vertical plate-shaped structure and is movably connected to the second mounting member so that the blade body can rotate within a certain range in the vertical direction.

[0007] The mounting frame is further provided with an adjusting assembly and a transmission assembly. The adjusting assembly is driven and connected to the blade body via the transmission assembly, so that the adjusting assembly can adjust the vertical rotation state of the blade body according to its rotation speed.

[0008] Furthermore, the first mounting member and the second mounting member are detachably connected, and the second mounting member and the blade body are detachably connected.

[0009] Furthermore, the first mounting member includes two mutually perpendicular mounting surfaces, wherein the vertical mounting surface is used to connect to the bottom of the grinding roller mounting frame of the grinder, and the horizontal mounting surface is connected to the second mounting member; the second mounting member includes a mutually perpendicular connecting plate and a mounting plate, wherein the connecting plate is connected to the horizontal mounting surface of the first mounting member, and the mounting plate is rotatably connected to the scraper body;

[0010] The mounting plate is also provided with a protruding blocking block, thereby limiting the maximum angle at which the blade body rotates downward under gravity.

[0011] Furthermore, the bottom of the blade body is horizontal, and the top gradually tilts downward in a concave arc shape from one side of the connecting seat toward the end, forming a tip structure facing away from the mounting frame.

[0012] Furthermore, the scraper body is an arc plate structure that matches the inner diameter of the grinding ring.

[0013] Furthermore, the adjustment component is arranged on the first mounting member, and the adjustment component includes a closed horizontal strip shell, and a partition plate is arranged inside the shell, thereby dividing the internal space of the shell into a accommodating chamber and a transmission chamber from the inside and the outside. The partition plate is perpendicular to the shell and is closed and slidably connected to the inner wall of the shell. Granular filler is arranged inside the accommodating chamber, and a power component connected to the partition plate is provided in the transmission chamber. The power component is driven and connected to the transmission assembly to convert the movement of the partition plate along the shell into power output to the shovel body.

[0014] Furthermore, the power part includes a screw rod parallel to the extension direction of the shell, one end of the screw rod is fixedly connected to the partition plate, and the other end is connected to a ball bearing. A shaft sleeve is provided on the outside of the ball bearing, and the shaft sleeve is fixedly connected to the inner wall of the shell so that the ball bearing can only rotate axially. A first gear is also coaxially provided at one end of the ball bearing.

[0015] Furthermore, the transmission assembly includes a horizontal transmission member and a vertical transmission member provided on the second mounting member, wherein a cover is provided on the outside of the horizontal transmission member and the vertical transmission member, and the horizontal transmission member includes a first transmission shaft extending horizontally through the shell to the interior of the transmission cavity, and a second gear and a third gear are coaxially provided at both ends of the first transmission shaft, wherein the second gear is drivingly connected to the first gear;

[0016] The vertical transmission member includes a vertically arranged second transmission shaft, and a fourth gear and a fifth gear are coaxially arranged at both ends of the second transmission shaft, wherein the fourth gear is drivingly connected to the third gear, and the fifth gear is located adjacent to the blade body.

[0017] Furthermore, it also includes a third transmission shaft which is arranged horizontally and passes through the second mounting member and the blade body at the same time. A sixth gear is provided at one end of the third transmission shaft and the other end is detachably connected to the blade body. The sixth gear is drivingly connected to the fifth gear.

[0018] Furthermore, the shaft sleeve is connected to the inner wall of the shell through a fixing rod, and a spring is provided between the fixing rod and the partition plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] In the present invention, the blade body is movably connected to the second mounting member, allowing the blade body to rotate vertically within a certain range. The mounting frame is also provided with an adjustment assembly and a transmission assembly. The adjustment assembly is driven by the blade body via the transmission assembly, allowing the adjustment assembly to adjust the vertical rotation state of the blade body according to its rotational speed. Therefore, when the grinding roller rotates rapidly, the adjustment assembly, through the transmission assembly, controls the blade to rotate upward. At this time, the powder accumulation is high, and the blade can scoop up the powder while maintaining a small contact surface with the grinding roller, reducing blade wear. When the grinding roller rotates slowly, the adjustment assembly controls the blade to rotate downward through the transmission assembly. At this time, the powder accumulation is low, allowing the blade to contact and scoop up a sufficient amount of powder, thereby maintaining a sufficient amount of powder for grinding. This allows the height of the blade's bottom end to be adjusted according to the different operating conditions of the grinder, minimizing blade wear while maintaining sufficient powder scooping, reducing the frequency of maintenance and replacement, and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1a This is a schematic diagram of powder accumulation when the driving motor rotates at a high speed.

[0022] Figure 1b This is a schematic diagram of powder accumulation when the driving motor speed is slow.

[0023] Figure 2 Schematic diagram of the structure of an embodiment of the present invention.

[0024] Figure 3 Schematic diagram of the rotation of the blade body relative to the second mounting member in an embodiment of the present invention.

[0025] Figure 4 Schematic top view of the cross section of the adjustment assembly and the horizontal transmission member in an embodiment of the present invention.

[0026] Figure 5 Schematic diagram of the interface between the horizontal transmission member, the vertical transmission assembly and the blade body in an embodiment of the present invention.

[0027] The above-mentioned Figure 2-5 In: 1. First mounting part; 2. Second mounting part; 3. Blade body; 4. Adjustment assembly; 5. Horizontal transmission part; 6. Vertical transmission part; 7. Cover; 11. Clamp; 12. Support plate; 21. Connecting plate; 22. Mounting plate; 41. Housing; 42. Partition plate; 43. Steel ball; 44. Screw; 45. Ball bearing; 46. Connecting ring; 47. First gear; 48. Spring; 49. Fixing rod; 51. Second gear; 52. First transmission rod; 53. Third gear; 61. Fourth gear; 62. Second transmission rod; 63. Fifth gear; 64. Sixth gear; 65. Third transmission rod.

[0028] Figure 1a and Figure 1bMiddle: A, grinding ring; B, grinding roller; C, powder. DETAILED DESCRIPTION

[0029] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0030] like Figure 2 As shown, an embodiment of the present invention provides a self-regulating Raymond mill blade structure, comprising a mounting frame and a blade body 3. The mounting frame comprises a first mounting member 1 and a second mounting member 2, interconnected with each other. The first mounting assembly is connected to the bottom of the mill's grinding roller mounting frame, while the second mounting assembly is connected to the blade body 3. The blade body 3 is suspended from the inner side of the grinding ring, with its top end contacting the grinding ring to scoop up powder. The blade body 3 is positioned forward of the grinding roller in its rotational direction, allowing the scooped powder to move backward between the grinding roller and the grinding ring, achieving a grinding effect.

[0031] In this embodiment, the first mounting member 1 includes two mutually perpendicular mounting surfaces, wherein the mounting surface in a vertical state is used to connect to the bottom of the grinding roller mounting frame of the grinder, and the horizontal mounting surface is connected to the second mounting member 2. Specifically, the first mounting member 1 includes two plywood plates 11 arranged in parallel, and the plywood plates 11 are bent vertically outward at one end corresponding to the grinding roller to form a vertical mounting surface, thereby being detachably connected to the bottom of the grinding roller mounting frame. A horizontal support plate 12 is provided at the bottom of the end of the plywood 11 corresponding to the grinding ring, serving as a horizontal mounting surface, thereby being connected to the second mounting member 2 via a screw and nut structure. Correspondingly, the second mounting member 2 includes a connecting plate and a mounting plate that are perpendicular to each other, wherein the connecting plate is horizontal and connected to the support plate 12 of the first mounting member 1, and the mounting plate is in a vertical state so as to be rotatably connected to the scraper body 3.

[0032] like Figure 3 As shown, it should be noted that in this embodiment, the top of the blade body 3 is rotatably connected to the mounting plate via a detachable rotating structure, allowing the blade body 3 to rotate vertically within a certain range. The mounting plate also features a protruding stopper located below and inward of the rotating shaft structure, thereby limiting the maximum downward rotation angle of the blade body 3 under the influence of gravity. Furthermore, because the first mounting member 1 and the second mounting member 2 are detachably connected, the second mounting member 2 and the blade body 3 are also detachably connected. If any components become damaged, they can be disassembled and replaced, eliminating the need for complete replacement, thereby reducing maintenance and operating costs.

[0033] Preferably, the bottom of the scraper body 3 is horizontal, and the top is gradually inclined downward in a concave arc shape from one side of the connecting seat toward the end, forming a tip structure facing away from the mounting frame. The tip structure enables it to have greater pressure when shoveling materials. Compared with the previous form of surface contact converted to point contact, it is not easy to leak materials due to gaps caused by slight deformation. This method can gradually shovel more materials through point contact, which has better working effect. At the same time, fewer contact surfaces also reduce wear. At the same time, it can also reduce the volume of the scraper body 3, saving production costs and replacement loss costs. In addition, the scraper body 3 and the side of the second mounting part 2 corresponding to the grinding ring are both arc plate structures that match the inner diameter of the grinding ring, so that they are parallel to the inner edge of the grinding ring. Therefore, wear can be reduced as much as possible during operation, thereby reducing the frequency of replacement and further reducing the production cost caused by replacement.

[0034] In this embodiment, the mounting frame is further provided with an adjustment assembly 4 and a transmission assembly. The adjustment assembly 4 is drivingly connected to the blade body 3 via the transmission assembly, allowing the adjustment assembly 4 to adjust the vertical rotational state of the blade body 3 according to its rotational speed. Specifically, the adjustment assembly 4 is mounted on the first mounting member 1 and includes a closed, horizontal, strip-shaped housing 41. The housing 41 is positioned in the space between the two clamping plates 11, with a portion of the housing 41 extending above the second mounting member 2 to connect to the transmission assembly.

[0035] like Figure 4 As shown, a partition plate 42 is disposed within the housing 41, thereby dividing the interior space of the housing 41 into a receiving chamber and a transmission chamber. The partition plate 42 is perpendicular to the housing 41 and is in closed sliding connection with the inner wall of the housing 41. The receiving chamber is filled with granular filler, which in this embodiment is steel balls 43. The transmission chamber is equipped with a power element connected to the partition plate 42. The power element is driven by the transmission assembly, converting the movement of the partition plate 42 along the housing 41 into power output to the blade body 3.

[0036] In the specific embodiment, the power element includes a screw 44 extending parallel to the direction of extension of the housing 41. One end of the screw 44 is fixedly connected to the partition plate 42, and the other end is connected to a ball bearing 45. A sleeve is provided on the outside of the ball bearing 45, and the sleeve is fixedly connected to the inner wall of the housing 41, so that the ball bearing 45 can only rotate axially. One end of the ball bearing 45 is also mounted with a first gear 47 via a connecting ring 46 sleeved on the outside of the screw 44. Obviously, when the steel ball rotates with the housing 41, it will be subjected to centrifugal force, which will exert pressure on the partition plate 42, thereby pushing the partition plate 42 and the screw 44 to move radially simultaneously. The faster the rotation speed and the greater the centrifugal force on the steel ball, the greater the pressure on the partition plate 42, the greater the distance the screw 44 is moved, and the greater the rotation amplitude of the first gear 47, ultimately transmitting more power to the blade body 3. Preferably, the sleeve is connected to the inner wall of the shell 41 through a fixing rod 49, and a spring 48 is provided between the fixing rod 49 and the partition plate 42. The spring 48 continuously applies elastic force toward the center of the grinder to the partition plate 42, so that the partition plate 42 can be reset when the pressure is small.

[0037] like Figure 5 As shown, the transmission assembly includes a horizontal transmission member 5 and a vertical transmission member 6 mounted on the second mounting member 2, wherein a cover 7 is provided on the exterior of each of the horizontal transmission member 5 and the vertical transmission member 6. The horizontal transmission member 5 includes a first transmission shaft extending horizontally through the housing 41 into the interior of the transmission chamber, with a second gear 51 and a third gear 53 coaxially disposed at both ends of the first transmission shaft, wherein the second gear 51 is drivingly connected to the first gear 47. The vertical transmission member 6 includes a second transmission shaft disposed vertically, with a fourth gear 61 and a fifth gear 63 coaxially disposed at both ends of the second transmission shaft, wherein the fourth gear 61 is drivingly connected to the third gear 53, and the fifth gear 63 is located adjacent to the blade body 3.

[0038] Furthermore, the third transmission shaft is horizontally arranged and extends through both the second mounting member 2 and the blade body 3. A sixth gear 64 is provided at one end of the third transmission shaft, and the other end is detachably connected to the blade body 3. The sixth gear 64 is drivingly connected to the fifth gear 63. Specifically, the connection between the third transmission shaft and the blade body 3 is a square rod and square hole structure, which enables axial detachability and rotational fixation. The portion of the third transmission shaft extending outside the blade body 3 is a threaded rod that, when engaged with a nut, provides limited position fixation of the blade body 3.

[0039] In this embodiment, gears 1 through 6 are all bevel gears that mesh sequentially. As the speed increases, the screw 44 moves axially, driving the first gear 47. Subsequently, the second gear 51, the third gear 53, and finally the sixth gear 64 rotate in a corresponding manner, thereby driving the third transmission shaft. The blade body 3 is fixedly connected to the third transmission shaft along the rotational direction, enabling upward rotation. As the speed decreases, the blade body 3 rotates downward under its own weight. Simultaneously, the force applied to the divider plate 42 by the steel ball 43 decreases, causing the spring 48 to drive the divider plate 42 and screw 44 in the opposite direction, further enabling downward rotation of the blade body 3.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A self-regulating Raymond mill blade structure, characterized by: The scraper body comprises a mounting frame and a scraper body, wherein the mounting frame comprises a first mounting member and a second mounting member connected to each other, wherein the first mounting member is connected to the bottom of the grinding roller mounting frame of the grinder, and the second mounting member is connected to the scraper body so that the scraper body is closely attached to the grinding ring. The scraper body is a vertical plate-shaped structure, and the scraper body is movably connected to the second mounting member so that the scraper body can rotate within a certain range in the vertical direction; The mounting frame is further provided with an adjusting assembly and a transmission assembly. The adjusting assembly is driven and connected to the blade body via the transmission assembly, so that the adjusting assembly can adjust the vertical rotation state of the blade body according to its rotation speed.

2. The self-regulating Raymond grinder blade structure according to claim 1, characterized in that: The first mounting member and the second mounting member are detachably connected, and the second mounting member and the blade body are detachably connected.

3. The self-regulating Raymond mill blade structure according to claim 1, characterized in that: The first mounting member includes two mutually perpendicular mounting surfaces, wherein the vertical mounting surface is used to connect to the bottom of the grinding roller mounting frame of the grinder, and the horizontal mounting surface is connected to the second mounting member; the second mounting member includes a mutually perpendicular connecting plate and a mounting plate, wherein the connecting plate is connected to the horizontal mounting surface of the first mounting member, and the mounting plate is rotatably connected to the scraper body; The mounting plate is also provided with a protruding blocking block, thereby limiting the maximum angle at which the blade body rotates downward under gravity.

4. The self-regulating Raymond mill blade structure according to claim 1, characterized in that: The bottom of the blade body is horizontal, and the top is gradually inclined downward from one side of the connecting seat toward the end in a concave arc shape, forming a tip structure away from the mounting frame.

5. The self-regulating Raymond mill blade structure according to claim 1, characterized in that: The scraper body is an arc plate structure that matches the inner diameter of the grinding ring.

6. The self-regulating Raymond mill blade structure according to claim 1, characterized in that: The adjustment assembly is arranged on the first mounting member, and the adjustment assembly includes a closed horizontal strip shell, and a partition plate is arranged inside the shell to divide the internal space of the shell into a accommodating chamber and a transmission chamber from the inside to the outside. The partition plate is perpendicular to the shell and is closed and slidably connected to the inner wall of the shell. Granular filler is arranged inside the accommodating chamber, and a power member connected to the partition plate is provided in the transmission chamber. The power member is driven and connected to the transmission assembly to convert the movement of the partition plate along the shell into power output to the shovel body.

7. The self-regulating Raymond grinder blade structure according to claim 6, characterized in that: The power part includes a screw rod parallel to the extension direction of the shell, one end of the screw rod is fixedly connected to the partition plate, and the other end is connected to a ball bearing. A shaft sleeve is provided on the outside of the ball bearing, and the shaft sleeve is fixedly connected to the inner wall of the shell so that the ball bearing can only rotate axially. A first gear is also coaxially provided at one end of the ball bearing.

8. The self-regulating Raymond grinder blade structure according to claim 7, characterized in that: The transmission assembly includes a horizontal transmission member and a vertical transmission member provided on the second mounting member, wherein a cover is provided on the outside of the horizontal transmission member and the vertical transmission member, and the horizontal transmission member includes a first transmission shaft extending horizontally through the shell to the interior of the transmission cavity, and a second gear and a third gear are coaxially provided at both ends of the first transmission shaft, wherein the second gear is drivingly connected to the first gear; The vertical transmission member includes a vertically arranged second transmission shaft, and a fourth gear and a fifth gear are coaxially arranged at both ends of the second transmission shaft, wherein the fourth gear is drivingly connected to the third gear, and the fifth gear is located adjacent to the blade body.

9. The self-regulating Raymond grinder blade structure according to claim 8, characterized in that: It also includes a third transmission shaft which is arranged horizontally and passes through the second mounting member and the blade body at the same time. A sixth gear is provided at one end of the third transmission shaft and the other end is detachably connected to the blade body. The sixth gear is drivingly connected to the fifth gear.

10. The self-regulating Raymond grinder blade structure according to claim 7, characterized in that: The shaft sleeve is connected to the inner wall of the shell through a fixing rod, and a spring is provided between the fixing rod and the partition plate.

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