Raymond mill

Abstract

The utility model discloses a Raymond mill which comprises a rack, a main machine arranged on the rack, and an analyzer arranged at the upper end of the main machine, the main machine comprises a shell, a main shaft rotationally mounted on the rack, a bracket fixedly connected to the main shaft, a grinding roller assembly mounted on the bracket, a driving mechanism for driving the main shaft, and a scraper knife fixedly connected to the main shaft through a rod body; the cover body assembly comprises a mounting seat fixedly connected to the upper end of the main shaft, a sleeve body rotationally arranged on the mounting seat in a sleeving manner, a cover body fixedly connected to the upper end of the mounting seat, and a plurality of guide plates which are arranged along the axis of the main shaft in a circular array manner and are fixedly connected with the sleeve body; the two sides of the end, fixedly connected with the sleeve body, of the guide plate are inclined, and the lower side of the guide plate is provided with a flange extending upwards. And the projection sides of the adjacent guide plates are mutually overlapped. The Raymond mill has the advantage of effectively solving the problem that coarse particles generated in the grinding process of the traditional Raymond mill are easy to accumulate at the upper end of the bracket.

Description

Technical Field

[0001] The utility model relates to the technical field of crushing equipment, in particular to a Raymond mill. Background Art

[0002] The Raymond mill is a commonly used industrial grinding machine, widely used in the chemical, building materials, and mining industries to grind non-flammable and non-explosive materials with a Mohs hardness of 9.3 or less. Rotating rollers apply crushing pressure to the material contained within the grinding ring, pulverizing it into a fine powder. Raymond mills are widely popular in domestic and international markets for their rational structure, reliable operation, easy maintenance, and cost-effectiveness. Existing Raymond mills feature an analyzer mounted above the main unit. The analyzer is typically driven by a motor, which rotates the internal rotor at a constant speed. When the material enters the analyzer with the airflow, it is blocked by the rotor blades. Fine powder that meets the required fineness can pass through the gaps between the blades and enter the subsequent collection system with the airflow. Coarser particles, unable to pass through the gaps between the blades, naturally settle and continue to be ground. As these coarse particles settle, some accumulate on the upper end of the support, preventing them from being crushed, resulting in low grinding efficiency. Furthermore, the particles accumulated on the upper end of the support increase the weight of the support, increasing the operating burden of the equipment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a Raymond mill.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A Raymond mill comprises a frame, a main machine mounted on the frame, and an analyzer mounted on the upper end of the main machine; the main machine comprises an outer shell, a main shaft rotatably mounted on the frame, a bracket fixedly connected to the main shaft, a grinding roller assembly mounted on the bracket, a driving mechanism for driving the main shaft, and a scraper fixedly connected to the main shaft through a rod; it also comprises a cover assembly, the cover assembly comprises a mounting seat fixedly connected to the upper end of the main shaft, a sleeve rotatably sleeved on the mounting seat, a cover fixedly connected to the upper end of the mounting seat, and a plurality of guide plates arranged in a circular array along the axis of the main shaft and fixed to the sleeve; both sides of the guide plate at one end fixedly connected to the sleeve are inclined, and the lower side has a rib extending upward; the projected sides of adjacent guide plates overlap each other.

[0006] Preferably, the mounting seat includes a ring sleeve mounted on the upper end of the main shaft, a connecting portion arranged at the upper end of the ring sleeve, a bearing portion arranged at the upper end of the connecting portion, and a pivot portion arranged at the upper end of the bearing portion, and the sleeve is rotatably mounted on the pivot portion.

[0007] Preferably, the cover body includes a top cover and a stud arranged at the lower end of the top cover; and a screw hole matching the stud is provided at the upper end of the mounting seat.

[0008] Preferably, there are eight guide plates.

[0009] Preferably, a frustum-shaped collecting cover is provided on the main shaft near the bottom of the shell.

[0010] Preferably, the driving mechanism includes a motor fixedly connected to the frame, and a pulley mechanism connected to the output end of the motor and the main shaft driving.

[0011] The above technical solution has the following advantages:

[0012] By adding a cover assembly to the upper end of the main shaft, this new design effectively addresses the problem of coarser particles easily accumulating on the upper end of the support during the grinding process in traditional Raymond mills. The cover assembly allows settled particles to be smoothly guided to the grinding ring, ensuring that particles that fail to reach the specified fineness are further ground, significantly improving overall grinding efficiency. Furthermore, the cover assembly acts as an airflow regulator, somewhat weakening the upward airflow from below. This helps coarser particles settle, making them more easily captured and returned to the grinding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a partial sectional front view of the utility model;

[0014] Figure 2 This is the main view of the cover assembly, and it is enlarged;

[0015] Figure 3 for Figure 2 A top view of

[0016] Figure 4 for Figure 2 Stereoscopic image of

[0017] Figure 5 for Figure 2 Exploded diagram;

[0018] Figure 6 This is an enlarged three-dimensional view of the mounting base;

[0019] In the picture:

[0020] 1-frame, 2-host, 3-analyzer, 4-housing, 5-spindle, 6-bracket, 7-grinding roller assembly, 8-driving mechanism, 9-rod body, 10-shovel, 11-cover assembly, 12-mounting seat, 13-sleeve, 14-cover, 15-guide plate, 16-rib, 17-ring, 18-connecting part, 19-bearing part, 20-pivot part, 21-top cover, 22-stud, 23-screw hole, 24-collecting cover, 25-motor, 26-pulley mechanism, 27-grinding ring. DETAILED DESCRIPTION

[0021] The following further describes specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the descriptions of these embodiments are intended to aid understanding of the present invention and do not constitute limitations on the present invention. Furthermore, the technical features involved in the various embodiments of the present invention described below may be combined with one another as long as they do not conflict with one another.

[0022] As shown in the accompanying drawings, a Raymond mill comprises a frame 1, a main machine 2 mounted on the frame 1, and an analyzer 3 mounted on the upper end of the main machine 2; the main machine 2 comprises a housing 4, a main shaft 5 rotatably mounted on the frame 1, a bracket 6 fixedly connected to the main shaft 5, a grinding roller assembly 7 mounted on the bracket 6, a driving mechanism 8 for driving the main shaft 5, and a scraper 10 fixedly connected to the main shaft 5 through a rod 9; it also comprises a cover assembly 11, the cover assembly 11 comprises a mounting seat 12 fixedly connected to the upper end of the main shaft 5, a sleeve 13 rotatably sleeved on the mounting seat 12, a cover 14 fixedly connected to the upper end of the mounting seat 12, and eight The guide plates 15 are arranged in a circular array along the axis of the main shaft 5 and are fixed to the sleeve 13; the two sides of the guide plate 15 at one end fixed to the sleeve 13 are inclined, and the lower side has an upwardly extending retaining edge 16, and the two sides of the guide plate 15 are inclined with one side high and the other side low, which can realize the movement of the material to the lower side and finally guide it to the grinding roller assembly 7 through the retaining edge 16. This kind of inclined guide plate 15 with one side high and the other side low can create gaps between adjacent guide plates 15, which is convenient for the rise of airflow; the projected sides of adjacent guide plates 15 overlap with each other to ensure that the settled particles are effectively received by the cover assembly 11.

[0023] As a specific technical solution of this embodiment, the mounting seat 12 includes a ring sleeve 17 that fits over the upper end of the main shaft 5, a connecting portion 18 disposed at the upper end of the ring sleeve 17, a bearing portion 19 disposed at the upper end of the connecting portion 18, and a pivot portion 20 disposed at the upper end of the bearing portion 19. The sleeve 13 is rotatably fitted over the pivot portion 20. The sleeve 13 and the pivot portion 20 can be mounted using sealed bearings. Obviously, other low-resistance rotating connectors can be used to reduce operating power consumption. The ring sleeve 17 can be fixedly connected to the upper end of the main shaft 5 by a locking screw, or by welding or other methods.

[0024] As a specific technical solution of this embodiment, the cover 14 includes a top cover 21 and a stud 22 provided at the lower end of the top cover 21; the upper end of the mounting base 12 is provided with a screw hole 23 that cooperates with the stud 22. The cover 14 improves the sealing performance of the rotating connection of the sleeve 13.

[0025] As a technical solution for further improvement of this embodiment, a conical collecting cover 24 is provided on the main shaft 5, near the bottom of the outer shell 4. The collecting cover 24 can push the material toward the scraper 10 as much as possible, that is, the material is concentrated toward the outside and close to the scraper 10, and the scraper 10 scoops up the material to further improve the grinding efficiency.

[0026] As a specific technical solution of this embodiment, the driving mechanism 8 includes a motor 25 fixedly connected to the frame 1, and a pulley mechanism 26 drivingly connected between the output end of the motor 25 and the main shaft 5. Obviously, other common driving methods can also be used.

[0027] By adding a cover assembly 11 to the upper end of the main shaft 5, the present invention effectively solves the problem of coarser particles easily accumulating on the upper end of the bracket 6 during the grinding process of a conventional Raymond mill. After the settled particles fall onto the cover assembly 11 through the cover assembly 11, they can be smoothly guided to the grinding ring 27, ensuring that these particles that fail to reach the specified fineness can be further ground, thereby significantly improving the overall grinding efficiency of the material. In addition, the cover assembly 11 can also regulate the airflow, which can, to a certain extent, reduce the intensity of the rising airflow in the area above the cover assembly 11, which helps to settle the coarser particles, making them easier to capture and return to the grinding area.

[0028] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.

Claims

1. A Raymond mill, comprising a frame (1), a main machine (2) mounted on the frame (1), and an analyzer (3) mounted on the upper end of the main machine (2); the main machine (2) comprising a housing (4), a main shaft (5) rotatably mounted on the frame (1), a bracket (6) fixedly connected to the main shaft (5), a grinding roller assembly (7) mounted on the bracket (6), a driving mechanism (8) for driving the main shaft (5), and a scraper (10) fixedly connected to the main shaft (5) via a rod (9); characterized in that: The invention also includes a cover assembly (11), wherein the cover assembly (11) includes a mounting seat (12) fixedly connected to the upper end of the main shaft (5), a sleeve (13) rotatably mounted on the mounting seat (12), a cover (14) fixedly connected to the upper end of the mounting seat (12), and a plurality of guide plates (15) arranged in a circular array along the axis of the main shaft (5) and fixedly connected to the sleeve (13); both sides of one end of the guide plate (15) fixedly connected to the sleeve (13) are inclined, and the lower side has a retaining edge (16) extending upward; the projected sides of adjacent guide plates (15) overlap each other.

2. The Raymond mill according to claim 1, characterized in that: The mounting seat (12) comprises a ring sleeve (17) sleeved on the upper end of the main shaft (5), a connecting portion (18) arranged at the upper end of the ring sleeve (17), a bearing portion (19) arranged at the upper end of the connecting portion (18), and a pivot portion (20) arranged at the upper end of the bearing portion (19), and the sleeve body (13) is rotatably sleeved on the pivot portion (20).

3. The Raymond mill according to claim 1, characterized in that: The cover body (14) includes a top cover (21) and a stud (22) arranged at the lower end of the top cover (21); and a screw hole (23) matching with the stud (22) is arranged at the upper end of the mounting seat (12).

4. The Raymond mill according to claim 1, characterized in that: There are eight guide plates (15).

5. The Raymond mill according to claim 1, characterized in that: A frustum-shaped material collecting cover (24) is provided on the main shaft (5) near the bottom of the shell (4).

6. The Raymond mill according to claim 1, characterized in that: The driving mechanism (8) comprises a motor (25) fixedly connected to the frame (1), and a pulley mechanism (26) drivingly connected to the output end of the motor (25) and the main shaft (5).

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