Quick dismounting device for grinding unit of flour mill

Abstract

The application discloses a quick dismounting device for a grinding unit of a flour mill, and relates to the field of food processing equipment.The quick dismounting device comprises a flour mill body, a grinding unit arranged on the flour mill body, two grinding unit cross beams arranged side by side at the bottom of the grinding unit and connected with the flour mill body, one guide rail arranged side by side below each grinding unit cross beam and fixed on the flour mill body, and two eccentric displacement rolling units arranged at intervals along the length direction of each grinding unit cross beam.The grinding unit is lifted as a whole by the reaction force of the guide rail through the eccentric structure by rotating the displacement rolling unit, and is automatically positioned and kept in the lifted gap, which is equivalent to installing four wheels capable of lifting at the bottom of the grinding unit.The grinding unit is slid out or moved in along the guide rail by the rolling part of the displacement rolling unit, and the whole process is light, flexible, safe and reliable, and the dismounting efficiency of the grinding unit is greatly improved, and the continuous production of the flour mill can be ensured.

Description

Technical Field

[0001] This invention relates to the field of food processing equipment, and in particular to a quick disassembly and assembly device for a grinding unit of a pulverizer. Background Technology

[0002] The grinding unit is the core of the mill. The grinding unit crushes and shears wheat step by step through a pair of grinding rollers with different speeds and rotating inwards relative to each other. Due to wear and tear, the grinding rollers need to be replaced periodically (about 3 months) with new, reprocessed grinding rollers to ensure their performance. This requires periodic disassembly and assembly of the grinding unit.

[0003] There are two options for replacing the existing grinding unit:

[0004] Option 1 uses a hydraulic lifting vehicle, which has two support arms. When disassembling the grinding unit, the support arms are raised or lowered by the lifting mechanism of the vehicle. The support arms are cantilevered. The problem with this option is that, because the grinding unit weighs approximately 1 ton, the hydraulic lifting vehicle has a complex structure and weighs approximately 800 kg, making disassembly and assembly very laborious, especially considering its complex structure and relatively heavy weight (approximately 800 kg) required for safe and reliable assembly and disassembly.

[0005] Option 2 involves disassembling the grinding unit within the mill body. The grinding rollers requiring maintenance or replacement are removed one by one using a hydraulic lifting trolley. After replacing the old rollers, the grinding unit is reassembled back onto the machine body. This avoids the problem of excessive weight associated with replacing the entire grinding unit and reduces the overall strength requirements of the hydraulic lifting trolley. The drawback of this option is that, because the grinding unit is disassembled for maintenance, it cannot be replaced as a whole. Each maintenance session takes approximately 2 to 4 hours, significantly impacting online production and sometimes necessitating production line shutdowns, severely disrupting operations. Summary of the Invention

[0006] In view of the above problems, the purpose of this invention is to provide a quick disassembly and assembly device for the grinding unit of a grinding mill. The present invention adopts the following technical solution:

[0007] This invention provides a quick assembly and disassembly device for a grinding unit of a grinding mill, including a grinding mill body, on which a grinding unit is provided. The grinding unit is connected to the grinding mill body through two grinding unit crossbeams arranged side by side at the bottom. A guide rail is arranged side by side below each grinding unit crossbeam and the guide rail is fixed to the grinding mill body.

[0008] Each grinding unit beam is provided with two eccentric displacement rolling units spaced apart along its length. When the grinding unit beam is released from the fixed state of the grinding mill body, the two eccentric displacement rolling units are rotated. The eccentric structure of the eccentric displacement rolling units is used to achieve rolling contact between the eccentric displacement rolling units and the guide rail. The grinding unit is then raised as a whole by the reaction support force of the guide rail.

[0009] Preferably, the eccentric displacement rolling unit includes an eccentric rotating component and a limiting component, wherein the eccentric rotating component is limited after rotation by the limiting component;

[0010] The eccentric rotating component includes a support body, which is rotatably connected to the crossbeam of the grinding unit; a rotating body is eccentrically arranged on the support body, and the rotating body rolls in cooperation with the guide rail below the crossbeam of the grinding unit.

[0011] Preferably, the support body includes an outer cylindrical section and an inner cylindrical section, the outer cylindrical section and the inner cylindrical section are arranged coaxially, and an intermediate cylindrical section is eccentrically disposed between the outer cylindrical section and the inner cylindrical section.

[0012] The outer cylindrical section and the inner cylindrical section are rotatably connected to the crossbeam of the grinding unit, and the rotating body is fitted onto the middle cylindrical section.

[0013] Preferably, the outer cylindrical section has an operating part at its outer exposed end that facilitates the rotation of the support body.

[0014] Preferably, the operating part is a hexagonal prism.

[0015] Preferably, the limiting component includes a retaining ring and a limiting post; the retaining ring is fitted and fixed on the inner cylindrical section, and a limiting protrusion is provided on the outer cylindrical wall of the retaining ring;

[0016] The limiting post is fixed on the crossbeam of the grinding unit. After the support body drives the rotating body to rotate eccentrically and raise the grinding unit as a whole, the limiting protrusion abuts against the limiting post, so that the support body maintains its current state.

[0017] Preferably, a fixing post is provided on one side of the retaining ring, and a fixing hole is provided on the outer exposed end of the middle cylindrical section. After the retaining ring is fitted onto the inner cylindrical section, the fixing post is embedded in the fixing hole.

[0018] Preferably, the grinding unit crossbeam is provided with mounting holes that mate with the eccentric displacement rolling unit; the mounting holes include an outer circular groove, an inner circular hole, and a guide groove;

[0019] The outer circular groove and inner circular hole are both provided on the side of the grinding unit crossbeam, and the outer circular groove and inner circular hole are arranged coaxially; the guide groove is provided at the bottom of the grinding unit crossbeam, the guide groove is arranged along the length direction of the grinding unit crossbeam, and partially penetrates the outer circular groove; the connection between the guide groove and the outer circular groove forms a rotating body hole;

[0020] The outer cylindrical section is fitted into the outer circular groove, the inner cylindrical section is fitted into the inner circular hole, and the rotating body is fitted into the rotating body hole; the guide rail is disposed in the guide groove;

[0021] The limiting post is disposed on the inner end face of the outer circular groove.

[0022] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0023] This invention utilizes a rotating displacement rolling unit. By employing an eccentric structure and the reaction force of the guide rail, the grinding unit is lifted by 1-3mm and automatically positioned to maintain the lifting gap. This is equivalent to installing four liftable wheels at the bottom of the grinding unit. The rolling part of the displacement rolling unit allows the grinding unit to slide out or move in along the guide rail. The entire process is lightweight, flexible, safe, and reliable, greatly improving the efficiency of disassembly and assembly of the grinding unit. It enables online replacement of the grinding unit to ensure continuous production. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a front view schematic diagram of the grinding unit installed on the mill body in this invention;

[0026] Figure 2 This is an exploded structural diagram of the eccentric displacement rolling unit in this invention;

[0027] Figure 3 This is a schematic diagram of the support structure in this invention;

[0028] Figure 4 This is a schematic diagram of the installation of the support body and the retaining ring in this invention;

[0029] Figure 5 This is a schematic diagram of the assembly of the eccentric displacement rolling unit and the mounting hole in this invention.

[0030] Figure 6 This is an exploded view of the assembly structure of the eccentric displacement rolling unit and the mounting hole in this invention.

[0031] Figure 7 This is a side view of the assembly of the eccentric displacement rolling unit and the mounting hole in this invention;

[0032] Figure 8 This is a schematic diagram of the use of the eccentric displacement rolling unit in this invention.

[0033] Explanation of reference numerals in the attached drawings: 1. Mill body; 2. Grinding unit; 3. Grinding unit crossbeam; 4. Guide rail; 5. Eccentric displacement rolling unit; 501. Eccentric rotating component; 501-1. Support body; 501-1-1. Outer cylindrical section; 501-1-2. Inner cylindrical section; 501-1-3. Intermediate cylindrical section; 501-1-4. Operating part; 501-2. Rotating body; 502. Limiting component; 502-1. Snap ring; 502-2. Limiting post; 502-3. Limiting protrusion; 502-4. Fixing post; 502-5. Fixing hole; 6. Mounting hole; 601. Outer groove; 602. Inner hole; 603. Guide groove; 604. Rotating body hole; 7. Transfer trolley. Detailed Implementation

[0034] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0037] like Figure 1As shown in the figure, this embodiment discloses a quick assembly and disassembly device for a grinding mill grinding unit, including a grinding mill body 1. A grinding unit 2 is disposed on the grinding mill body 1. The grinding unit 2 is connected to the grinding mill body 1 through two grinding unit crossbeams 3 arranged side by side at the bottom. The grinding unit 2 is fixed to the grinding unit crossbeams 3 by bolts, and the grinding unit crossbeams 3 are in turn fixed to the grinding mill body 1 by bolts. A guide rail 4 is arranged side by side below each grinding unit crossbeam 3, and the guide rail 4 is fixed to the grinding mill body 1.

[0038] Each grinding unit beam 3 is provided with two eccentric displacement rolling units 5 at intervals along its length. When the grinding unit beam 3 is released from the fixed state of the grinding mill body 1, the two eccentric displacement rolling units 5 are rotated. The eccentric structure of the eccentric displacement rolling units 5 is used to achieve rolling contact between the eccentric displacement rolling units 5 and the guide rail 4, and the grinding unit 2 is raised as a whole by the reaction support force of the guide rail 4.

[0039] like Figure 2 As shown, the eccentric displacement rolling unit 5 includes an eccentric rotating component 501 and a limiting component 502. The eccentric rotating component 501 is limited after rotation by the limiting component 502.

[0040] The eccentric rotating component 501 includes a support body 501-1, which is rotatably connected to the crossbeam 3 of the grinding unit; a rotating body 501-2 is eccentrically arranged on the support body 501-1, and the rotating body 501-2 is in rolling cooperation with the guide rail 4 below the crossbeam 3 of the grinding unit.

[0041] The limiting component 502 includes a retaining ring 502-1 and a limiting post 502-2. The retaining ring 502-1 is fitted and fixed on the inner cylindrical section 501-1-2, and a limiting protrusion 502-3 is provided on the outer cylindrical wall of the retaining ring 502-1. The limiting post 502-2 is fixed on the crossbeam 3 of the grinding unit. After the support body 501-1 drives the rotating body 501-2 to rotate eccentrically and raise the grinding unit 2 as a whole, the limiting protrusion 502-3 abuts against the limiting post 502-2, keeping the support body 501-1 in its current state. The rotating body 501-2 can use a bearing or a sliding sleeve, and the bearings include needle roller bearings, deep groove ball bearings, etc.

[0042] like Figure 3As shown, in this embodiment, the support 501-1 includes an outer cylindrical segment 501-1-1 and an inner cylindrical segment 501-1-2, which are coaxially arranged. An intermediate cylindrical segment 501-1-3 is eccentrically positioned between the outer and inner cylindrical segments 501-1-1 and 501-1-2. The diameters of the outer cylindrical segment 501-1-1, the intermediate cylindrical segment 501-1-3, and the inner cylindrical segment 501-1-2 decrease sequentially. The outer cylindrical segment 501-1-1 and the inner cylindrical segment 501-1-2 are rotatably connected to the grinding unit crossbeam 3, and the rotating body 501-2 is fitted onto the intermediate cylindrical segment 501-1-3.

[0043] An operating part 501-1-4 is provided at the outer exposed end of the outer cylindrical section 501-1-1 to facilitate the rotation of the support body 501-1. The operating part 501-1-4 can be driven by a tool. In this embodiment, the operating part 501-1-4 is a hexagon.

[0044] like Figure 4 As shown, in this embodiment, a structure is provided to secure the retaining ring 502-1 to the inner cylindrical segment 501-1-2. A fixing post 502-4 is provided on one side of the retaining ring 502-1, and a fixing hole 502-5 is provided at the exposed end of the middle cylindrical segment 501-1-3. After the retaining ring 502-1 is fitted onto the inner cylindrical segment 501-1-2, the fixing post 502-4 is embedded into the fixing hole 502-5. This achieves synchronous rotation between the retaining ring 502-1 and the support body 501-1.

[0045] like Figures 5 to 7 As shown, the grinding unit crossbeam 3 has mounting holes 6 that mate with the eccentric displacement rolling unit 5; the mounting holes 6 include an outer circular groove 601, an inner circular hole 602, and a guide groove 603. The outer circular groove 601 and the inner circular hole 602 are both located on the side of the grinding unit crossbeam 3, and are arranged coaxially; the guide groove 603 is located at the bottom of the grinding unit crossbeam 3, and is arranged along the length of the grinding unit crossbeam 3, and partially penetrates the outer circular groove 601; the connection between the guide groove 603 and the outer circular groove 601 forms a rotating body hole 604.

[0046] The outer cylindrical section 501-1-1 is fitted into the outer circular groove 601, the inner cylindrical section 501-1-2 is fitted into the inner circular hole 602, and the rotating body 501-2 is fitted into the rotating body hole 604; the guide rail 4 is set in the guide groove 603.

[0047] The limiting post 502-2 is set on the inner end face of the outer circular groove 601.

[0048] like Figure 8As shown, the operation process of the present invention is as follows:

[0049] Four sets of eccentric displacement rolling units 5 are respectively installed in the four mounting holes 6 on the crossbeam 3 of the grinding unit. The operating part 501-1-4 is rotated in a fixed direction using an operating tool. The operating part 501-1-4 drives the entire support body 501-1 to rotate. Since the rotating body 501-2 is installed on the eccentrically arranged middle cylindrical section 501-1-3, the support body 501-1 rotates while driving the rotating body 501-2 to eccentrically displace. After the eccentric displacement, the outer ring of the rotating body 501-2 abuts against the guide rail 4 in the guide groove 603. The reaction force of the guide rail 4 lifts the crossbeam 3 of the grinding unit together with the grinding unit 2, so that the crossbeam 3 of the grinding unit is separated from the mill body 1. After the grinding unit is lifted by 2-3mm, the support body 501-1 is kept in its current state by the limiting cooperation of the limiting post 502-2 and the limiting protrusion 502-3.

[0050] The four rotating bodies 501-2 in the four eccentric displacement rolling units 5 are equivalent to rollers. They roll outward along the guide rail 4, which allows the grinding unit 2 to be quickly slid out and disassembled from the mill body 1.

[0051] A transfer trolley 7 is set at the outer end of the guide rail 4. The top of the transfer trolley 7 is also covered with guide rail 4. The guide rail 4 on the transfer trolley 7 corresponds one-to-one with the guide rail 4 on the mill body 1. In this way, when the grinding unit 2 is slid out and disassembled, it is directly transferred to the transfer trolley 7.

[0052] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A quick assembly / disassembly device for a grinding unit of a pulverizer, comprising a pulverizer body (1), wherein a grinding unit (2) is provided on the pulverizer body (1), and the grinding unit (2) is connected to the pulverizer body (1) via two parallel grinding unit crossbeams (3) at the bottom, characterized in that: Below each of the grinding unit beams (3), there is a guide rail (4) arranged side by side, and the guide rail (4) is fixed on the mill body (1); Each grinding unit beam (3) is provided with two eccentric displacement rolling units (5) at intervals along its length. When the grinding unit beam (3) is released from the fixed state with the grinding mill body (1), the two eccentric displacement rolling units (5) are rotated. The eccentric structure of the eccentric displacement rolling units (5) is used to realize the rolling contact between the eccentric displacement rolling units (5) and the guide rail (4), and the grinding unit (2) is raised as a whole by the reaction support force of the guide rail (4). The eccentric displacement rolling unit (5) includes an eccentric rotating component (501) and a limiting component (502). The eccentric rotating component (501) is limited after rotation by the limiting component (502). The eccentric rotating component (501) includes a support body (501-1), which is rotatably connected to the crossbeam (3) of the grinding unit; a rotating body (501-2) is eccentrically arranged on the support body (501-1), and the rotating body (501-2) is in rolling cooperation with the guide rail (4) below the crossbeam (3) of the grinding unit.

2. The quick disassembly and assembly device for the grinding unit of the grinding mill according to claim 1, characterized in that: The support body (501-1) includes an outer cylindrical section (501-1-1) and an inner cylindrical section (501-1-2), the outer cylindrical section (501-1-1) and the inner cylindrical section (501-1-2) are arranged coaxially, and an intermediate cylindrical section (501-1-3) is eccentrically provided between the outer cylindrical section (501-1-1) and the inner cylindrical section (501-1-2). The outer cylindrical section (501-1-1) and the inner cylindrical section (501-1-2) are rotatably connected to the crossbeam (3) of the grinding unit, and the rotating body (501-2) is fitted onto the middle cylindrical section (501-1-3).

3. The quick disassembly and assembly device for the grinding unit of the grinding mill according to claim 2, characterized in that: The outer cylindrical section (501-1-1) is provided with an operating part (501-1-4) at its outer end to facilitate the rotation of the support (501-1).

4. The quick disassembly and assembly device for the grinding unit of the grinding mill according to claim 3, characterized in that: The operating part (501-1-4) is a hexagon.

5. The quick disassembly and assembly device for the grinding unit of the grinding mill according to claim 2, characterized in that: The limiting component (502) includes a retaining ring (502-1) and a limiting post (502-2); the retaining ring (502-1) is fitted and fixed on the inner cylindrical section (501-1-2), and a limiting protrusion (502-3) is provided on the outer cylindrical wall of the retaining ring (502-1). The limiting post (502-2) is fixed on the crossbeam (3) of the grinding unit. After the support body (501-1) drives the rotating body (501-2) to rotate eccentrically and raise the grinding unit (2) as a whole, the limiting protrusion (502-3) abuts against the limiting post (502-2) to keep the support body (501-1) in its current state.

6. The quick disassembly and assembly device for the grinding unit of a grinding mill according to claim 5, characterized in that: A fixing post (502-4) is provided on one side of the retaining ring (502-1), and a fixing hole (502-5) is provided on the outer exposed end of the middle cylindrical section (501-1-3). After the retaining ring (502-1) is fitted onto the inner cylindrical section (501-1-2), the fixing post (502-4) is embedded into the fixing hole (502-5).

7. The quick disassembly and assembly device for the grinding unit of a grinding mill according to claim 5, characterized in that: The grinding unit beam (3) is provided with mounting holes (6) that cooperate with the eccentric displacement rolling unit (5); the mounting holes (6) include an outer circular groove (601), an inner circular hole (602) and a guide groove (603). The outer circular groove (601) and the inner circular hole (602) are both provided on the side of the grinding unit crossbeam (3), and the outer circular groove (601) and the inner circular hole (602) are arranged coaxially; the guide groove (603) is provided at the bottom of the grinding unit crossbeam (3), the guide groove (603) is arranged along the length direction of the grinding unit crossbeam (3), and partially penetrates the outer circular groove (601); the connection between the guide groove (603) and the outer circular groove (601) forms a rotating body hole (604). The outer cylindrical section (501-1-1) is fitted into the outer circular groove (601), the inner cylindrical section (501-1-2) is fitted into the inner circular hole (602), and the rotating body (501-2) is fitted into the rotating body hole (604); the guide rail (4) is disposed in the guide groove (603); The limiting post (502-2) is disposed on the inner end face of the outer circular groove (601).

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