Stirring device for feeding pipe of cement grinding mill

Abstract

The utility model discloses a cement mill feed pipe stirring device which comprises a stock bin and a feed pipe obliquely arranged at the bottom of the stock bin, the upper end of the feed pipe is connected and communicated with the bottom of the stock bin, a flange plate fixedly connected with the feed pipe is arranged on the side wall of the feed pipe in a sleeved mode, and a plurality of bearing seats are arranged on the front end face of the flange plate in the circumferential direction. A rotating shaft is rotationally arranged on each bearing seat, a first gear is coaxially arranged on each rotating shaft, an inner gear is arranged on the feeding pipe in a sleeving manner, inner teeth of the inner gear are in meshing transmission fit with outer teeth of the gears, and one rotating shaft penetrates through the flange plate and is connected with a driving mechanism arranged on the feeding pipe; a first positioning rod fixedly connected with the inner gear is arranged on the outer side of the feeding pipe, an adjusting shaft is arranged in the feeding pipe, a scraper is arranged on the adjusting shaft, and one end of the adjusting shaft extends out of a discharging opening of the feeding pipe and is connected with a second positioning rod through the first positioning rod. The anti-blocking device can effectively solve the problem that the feeding pipe of the cement grinding mill is blocked, and is good in anti-blocking effect.

Description

Technical Field

[0001] This utility model relates to the field of cement production equipment technology, and in particular to a cement mill feed pipe mixing device. Background Technology

[0002] Cement mills are widely used in cement plants. Commonly used mills include ball mills, tube mills, and ball mills, which account for approximately two-thirds of the total electricity consumption of a cement plant. Mills play a crucial role in cement production; the correct design of the mill's transmission system, the quality of its manufacturing process, and the quality of its installation, inspection, and maintenance all significantly impact its normal operation and electricity consumption.

[0003] Currently, due to the high water content of desulfurized gypsum, cement mill feed inlets frequently experience clumping and blockage, resulting in material return and ash spraying from the mill head. In order to maintain continuous production, operators have to increase the speed of the mill tail fan, which leads to insufficient ventilation and increased pressure inside the mill. This directly affects the changes in process parameters inside the mill, causing a reduction in cement quality and failing to solve the blockage problem. It is necessary to frequently clean the feed pipe manually, which is time-consuming and labor-intensive. Utility Model Content

[0004] This utility model provides a cement mill feed pipe mixing device, which solves the problems of easy clumping and blockage at the feed inlet of the traditional cement mill feed pipe, resulting in material return and dust spraying from the mill head, and time-consuming and labor-intensive manual cleaning.

[0005] This utility model provides a cement mill feed pipe mixing device, including a silo and a feed pipe inclinedly disposed at the bottom of the silo. The upper end of the feed pipe is connected to the bottom of the silo. A flange fixedly connected to the side wall of the feed pipe is sleeved on it. Multiple bearing seats are disposed along the circumferential direction on the front end face of the flange. A rotating shaft is rotatably disposed on each bearing seat. A first gear is coaxially disposed on each rotating shaft. An internal gear is sleeved on the feed pipe. The internal teeth of the internal gear mesh with the external teeth of each of the first gears. One of the rotating shafts passes through the flange and is connected to a drive mechanism disposed on the feed pipe. A first positioning rod is disposed on the outside of the feed pipe and fixedly connected to the internal gear. An adjusting shaft is disposed inside the feed pipe. A scraper is disposed on the adjusting shaft. One end of the adjusting shaft extends out of the discharge port of the feed pipe and is connected to a second positioning rod through the first positioning rod.

[0006] Furthermore, two limiting plates are symmetrically arranged on both sides of the internal gear and are fixedly connected to the outer wall of the feed pipe.

[0007] Furthermore, the first positioning rod is parallel to the axis of the feed tube.

[0008] Furthermore, the second positioning rod is a telescopic rod, which is located at the outlet of the feed pipe and distributed radially.

[0009] Furthermore, the second positioning rod includes a fixed tube, a guide tube, and an adjusting screw. One end of the fixed tube is fixedly connected to the first positioning rod, and the other end is partially inserted into one end of the guide tube. A threaded hole communicating with the inner cavity of the guide tube is provided on the side wall of the guide tube. An adjusting screw is provided in the threaded hole to position and fix the fixed tube and the guide tube. An installation hole is provided on the side wall of the other end of the guide tube, and the adjusting shaft is inserted into the installation hole and positioned and fixedly connected by an adjusting nut.

[0010] Furthermore, a scraper is provided between the scraper and the inner wall of the feed pipe, and one end of the scraper is fixedly connected to the second positioning rod.

[0011] As can be seen from the above technical solutions, this utility model provides a cement mill feed pipe mixing device.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention drives the rotating shaft and the first gear to rotate via a drive mechanism, which in turn causes the inner gear to rotate with the first gear. During the rotation of the inner gear, the first and second positioning rods drive the scraper to rotate circumferentially on the inner wall of the feed pipe to scrape material. The scraper and the hanging knife periodically clean the accumulated material on the inner wall of the feed pipe, resulting in high cleaning efficiency and improved operating efficiency of the feeding process. It can effectively improve the phenomenon of mill idling caused by material blockage in the grinding head and save on manual labor intensity. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the implementation examples will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of a cement mill feed pipe mixing device proposed in this utility model.

[0016] Figure 2 This is a partial structural schematic diagram of a cement mill feed pipe mixing device proposed in this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the feed pipe of a cement mill feed pipe mixing device proposed in this utility model.

[0018] Figure 4 This is a top view schematic diagram of the scraper structure of a cement mill feed pipe mixing device proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the internal gear installation structure of a cement mill feed pipe mixing device proposed in this utility model;

[0020] Figure 6 This is a schematic diagram showing the installation position of the limiting plate of the cement mill feed pipe mixing device proposed in this utility model.

[0021] In the picture:

[0022] 1-Hopper;

[0023] 2-Feed pipe; 21-Adjusting shaft; 22-Scraper; 23-Scraper blade; 211-Adjusting nut;

[0024] 3-Flange; 31-Bearing housing; 32-Limiting plate;

[0025] 4- Rotating shaft;

[0026] 5-First gear;

[0027] 6-Internal gear;

[0028] 7-Drive mechanism; 71-Motor; 72-Reducer;

[0029] 8-First positioning rod;

[0030] 9-Second positioning rod; 91-Fixing tube; 92-Guide tube; 93-Adjusting screw. Detailed Implementation

[0031] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0032] Example 1:

[0033] See Figure 1-6A cement mill feed pipe mixing device includes a hopper 1 and a feed pipe 2 inclinedly disposed at the bottom of the hopper 1. The upper end of the feed pipe 2 is connected to the discharge port at the bottom of the hopper 1. Part of the feed pipe 2 extends into the feed port of the cement mill to guide the material into the cement mill. A flange 3 is fitted onto the side wall of the feed pipe 2 and fixedly connected thereto. Multiple bearing seats 31 are arranged along the circumferential direction on the front end face of the flange 3. A rotating shaft 4 is disposed on each bearing seat 31. One end of the rotating shaft 4 is rotatably connected to the bearing seat 31, and the other end is suspended. The suspended end of each rotating shaft 4 is coaxially fixed. A first gear 5 is fixedly installed, and an internal gear 6 is sleeved on the outside of the feed pipe 2. The internal teeth of the internal gear 6 mesh with the external teeth of each of the first gears 5, so that the internal gear 6 is supported by each of the first gears 5 and can rotate coaxially along the feed pipe 2. The rear end of one of the rotating shafts 4 passes through the flange 3 and is connected to the drive mechanism 7 set on the side wall of the feed pipe 2. A first positioning rod 8 is set on the outside of the feed pipe 2 and is fixedly connected to the outer wall of the internal gear 6. An adjusting shaft 21 is set axially inside the feed pipe 2. The adjusting shaft 21 is installed close to the inner wall of the feed pipe 2. A scraper 22 is welded and fixed to the wall. The scraper 22 is a long strip plate, and its long side is the scraping part. The scraping part is machined with serrations. By abutting against the inner wall of the feed pipe 2, it scrapes off the material adhering to the inner wall of the feed pipe 2 during circumferential rotation, preventing material accumulation and blockage of the feed pipe 2. One end of the adjusting shaft 21 extends from the outlet of the feed pipe 2 to the discharge outlet of the feed pipe 2 and is fixedly connected to the second positioning rod 9 through the first positioning rod 8. The driving mechanism 7 drives one of the rotating shafts 4 and the first gear 5 to rotate, which can make the internal gear 6 follows the rotation of the first gear 5. During the rotation of the internal gear 6, the scraper 22 is driven to rotate in the circumferential direction on the inner wall of the feed pipe 2 through the first positioning rod 8 and the second positioning rod 9 to scrape the material. This keeps the drive mechanism 7, the first gear 5, and the gear 6 at a greater distance from the cement mill, preventing the dust generated by the cement mill from affecting the transmission accuracy of the drive mechanism 7, the first gear 5, and the gear 6. The scraper 22 periodically cleans the accumulated material on the inner wall of the feed pipe 2, improving the operating efficiency of the feeding process and effectively improving the phenomenon of the mill running idle due to the blockage of the grinding head.

[0034] In this embodiment, see Figure 2 , 3 Two limiting plates 32 are symmetrically arranged on both sides of the internal gear 6 and fixedly connected to the outer wall of the feed pipe 2. The two limiting plates 32 are respectively clearance-fitted with the front and rear end faces of the internal gear 6. The internal gear 6 is restricted to the outer teeth of each first gear 5 by the two limiting plates 32, so that the internal gear 6 will not disengage from the outer teeth of each first gear 5, thereby increasing the meshing transmission accuracy between the internal gear 6 and each first gear 5 and making the first positioning rod 8 perform stable circular motion.

[0035] In this embodiment, see Figure 2 , 3The first positioning rod 8 is parallel to the axis of the feed pipe 2. The first positioning rod 8 will not interfere with the feed pipe 2 during its circular motion outside the feed pipe 2. The second positioning rod 9 is a telescopic rod. By adjusting the length of the second positioning rod 9, it is easy to remove the scraper 22 from the feed pipe 2. The second positioning rod 9 is set at the outlet of the feed pipe 2 and distributed radially. By adjusting the gap between the scraper 22 and the inner wall of the feed pipe 2 radially by the second positioning rod 9, the scraping depth can be flexibly adjusted.

[0036] In this embodiment, see Figure 2 , 3 The second positioning rod 9 includes a fixed tube 91, a guide tube 92, and an adjusting screw 93. The guide tube 92 is a rectangular hollow tube. One end of the fixed tube 91 is fixedly connected to the first positioning rod 8, and the other end is inserted into the interior of one end of the guide tube 92. A threaded hole communicating with its inner cavity is provided on the side wall of the guide tube 92. An adjusting screw 93 is provided in the threaded hole to position and fix the fixed tube 91 and the guide tube 92. An installation hole is provided on the side wall of the other end of the guide tube 92. An adjusting shaft 21 is inserted into the installation hole and positioned and fixedly connected by an adjusting nut 211. The length of the second positioning rod 9 is adjusted by the adjusting nut 211 to facilitate the disassembly of the scraper 22.

[0037] In this embodiment, see Figure 2 , 4 A scraper 23 is provided between the scraper 22 and the inner wall of the feed pipe 2. The scraper 23 is a long strip with an isosceles triangle cross-section. The scraper 23 is parallel to the axis of the feed pipe 2. One end of the scraper 23 extends out of the feed pipe 2 and is vertically fixed to the second positioning rod 9. Both sides of the scraper 23 are machined with cutting edges, and both cutting edges of the scraper 23 abut against the inner wall of the feed pipe 2. During the rotation of the second positioning rod 9, the two cutting edges of the scraper 23 can play a scraping role in both clockwise and counterclockwise rotation, further scraping the material adhering to the feed pipe 2 and preventing the inner wall of the feed pipe 2 from being blocked. Optionally, the sides of the scraper 22 and the scraper 23 are covered with through holes to facilitate the passage of material and prevent material accumulation on the surface of the scraper 22 and the scraper 23.

[0038] In this embodiment, see Figure 1 The drive mechanism 7 includes a motor 71 and a reducer 72. The motor 71 and the reducer 72 are fixedly mounted on the side wall of the feed pipe 2. The motor 71 is a servo motor, which can precisely control the rotation direction of the scraper 22 and the scraper 23. The output shaft of the motor 71 is connected to the input end of the reducer 72, and the output end of the reducer 72 is connected to the corresponding rotating shaft 4. The motor 71 drives the reducer 72 to rotate the rotating shaft 4, providing a stable speed for the scraper 22 and the scraper 23.

[0039] As can be seen from the above technical solution, during use, the DCS controller controls the motor 71 to drive the reducer 72 to rotate the corresponding rotating shaft 4. During the rotation of the rotating shaft 4, the first gear 5 rotates. The rotation of the first gear 5, through the meshing of its external teeth with the internal teeth of the internal gear 6, drives the internal gear 6 to rotate outside the feed pipe 2. During the rotation of the internal gear 6, it is supported by the eight first gears 5. During the rotation of the internal gear 6, the first positioning rod 8 rotates. During the rotation of the first positioning rod 8, the second positioning rod 9 performs a circular motion. The second positioning rod 9 drives the adjusting shaft 21 and the scraper 22 on the adjusting shaft 21 to rotate counterclockwise on the inner wall of the feed pipe 2, performing preliminary scraping and cleaning of the material adhering to the inner wall of the feed pipe 2, preventing the material from accumulating on the inner wall of the feed pipe 2 for a long time and causing blockage. The second positioning rod 9 drives the scraper 23 to perform a circular motion along the inner wall of the feed pipe 2, thoroughly cleaning the material on the inner wall of the feed pipe 2, preventing the material adhering to the inner wall of the feed pipe 2 from causing blockage.

[0040] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope of the invention is indicated by the claims.

[0041] It should be understood that this utility model is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model.

Claims

1. A cement mill feed pipe agitator characterized by: The utility model relates to a kind of material feeding devices, including silo (1) and the inlet pipe (2) of the bottom of the silo (1) is arranged obliquely, the inlet pipe (2) upper end is connected with the bottom of the silo (1) communication, the side wall of the inlet pipe (2) is set with the flange plate (3) of fixed connection, the front end surface of the flange plate (3) is provided with multiple bearing seats (31) along the circumferential direction, each bearing seat (31) is rotatably arranged on the rotating shaft (4), each rotating shaft (4) is coaxially arranged on the first gear (5), the inlet pipe (2) is set with internal gear (6), the inner tooth of the internal gear (6) is engaged with the outer tooth of each first gear (5) transmission cooperation, one of the rotating shaft (4) is connected with the drive mechanism (7) arranged on the inlet pipe (2) and the flange plate (3) is penetrated, the first positioning rod (8) fixedly connected with the internal gear (6) is arranged on the outside of the inlet pipe (2), the adjusting shaft (21) is arranged in the inlet pipe (2), the adjusting shaft (21) is arranged on the scraper (22), one end of the adjusting shaft (21) is arranged in the discharge port of the inlet pipe (2) and is connected with the second positioning rod (9) by first positioning rod (8).

2. A cement mill feed pipe agitator according to claim 1, characterised in that, Two limiting plates (32) fixedly connected with the outer wall of the inlet pipe (2) are symmetrically arranged on the both sides of the internal gear (6).

3. A cement mill feed pipe agitator according to claim 1, wherein, The first positioning rod (8) is parallel to the axis of the inlet pipe (2).

4. A cement mill feed pipe agitator according to claim 1, wherein, The second positioning rod (9) is a telescopic rod, and the second positioning rod (9) is arranged at the discharge port of the inlet pipe (2) and distributed along the radial direction.

5. A cement mill feed pipe agitator according to claim 4, wherein, The second positioning rod (9) includes a fixed tube (91), a guide tube (92) and an adjusting screw (93), one end of the fixed tube (91) is fixedly connected with the first positioning rod (8), and the other end is partially inserted into the inner part of one end of the guide tube (92), a threaded hole is arranged on the side wall of the guide tube (92) and communicated with the inner cavity thereof, the adjusting screw (93) is arranged in the threaded hole to positionally and fixedly connect the fixed tube (91) and the guide tube (92), an installation hole is arranged on the other end side wall of the guide tube (92), the adjusting shaft (21) is inserted into the installation hole and is positionally and fixedly connected through an adjusting nut (211).

6. A cement mill feed pipe agitator according to claim 1, wherein, A scraper (23) is arranged between the scraper (22) and the inner wall of the inlet pipe (2), and the scraper (23) is fixedly connected with the second positioning rod (9).

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