Chain lifting single-spiral classifier

Abstract

According to the chain lifting single-spiral classifier, two large chain wheels are installed at the lower end of a spiral shaft, the large chain wheels and the spiral shaft are connected into a whole through flat keys, and a chain wheel lifting support, a chain wheel lifting trolley and an electric hoist are installed at the lower end of a U-shaped groove of the classifier. Small chain wheels at the two ends of the chain lifting trolley are connected with the two large chain wheels through two chains with the same length respectively, four wheels at the two ends of the chain lifting trolley make rolling contact along four rails on the two sides of the lifting support, and under the action of the electric hoist, the chain lifting trolley achieves lifting of the spiral shaft through the two chains and the two large chain wheels. The problem that a bearing at the lower end is abraded by ore particles in an original classifier is solved, cost and maintenance workload are reduced, meanwhile, the problem that a U-shaped groove is abraded by a spiral blade due to the fact that a spiral shaft sinks due to abrasion of the bearing of the original classifier is solved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The invention patent relates to a classifier for mineral processing equipment, a chain-lifting single-screw classifier. Background Art

[0002] At present, the lower end of the spiral shaft of the classifier used in domestic mineral processing is installed with a bearing or nylon sleeve. The horizontal positioning of the bearing seat or nylon is roughly positioned by the positioning plates on the left and right sides. The lower end of the spiral shaft is lifted and lowered by a screw rod or an electric hoist to lift the bearing seat or nylon seat. It has the following problems:

[0003] 1. After the tiny mineral particles ground by the ball mill enter the classifier, the bearings, nylon seats and shaft heads at the lower end of the spiral shaft are severely worn and need to be replaced frequently, which increases the cost of accessories and the maintenance workload, and affects the normal mineral processing operations.

[0004] 2. The bearing, nylon seat and shaft head at the lower end of the spiral shaft are seriously worn, making the position of the lower end of the spiral shaft uncertain. If the lower end of the spiral shaft drops too much, the spiral blades will wear the bottom of the U-shaped groove, reducing the life of the equipment; if the lower end of the spiral shaft swings too much left and right, it will also reduce the working efficiency of the classifier. Summary of the invention

[0005] In order to solve the problems existing in the current classifiers used in mineral processing, the present invention patent designs a chain-lifting single-spiral classifier. Two large sprockets are installed at the lower end of the spiral shaft of the classifier. The large sprockets rotate with the spiral shaft through a flat key. The two large sprockets are connected to the small sprockets at both ends of the lifting trolley through two chains of equal length, which can ensure that the lower end of the spiral shaft will not be worn by tiny mineral particles and the position will remain fixed, thereby reducing the cost of accessories, reducing the number of shutdowns for maintenance, reducing the impact of maintenance on mineral processing production, and increasing the service life of the equipment.

[0006] The chain-lifting single spiral classifier is composed of a U-shaped groove, a bracket, a power mechanism, an articulated shaft, a spiral shaft, a spiral blade and a chain lifting system. The bracket is installed below the U-shaped groove and the power mechanism. The driving shaft of the power mechanism rotates with the spiral shaft. The power mechanism and the spiral shaft are hinged to the bracket through the articulated shaft. Two large sprockets are installed at the lower end of the spiral shaft. The chain lifting system is composed of a lifting bracket, a lifting trolley, an electric hoist and two chains of equal length.

[0007] Two large sprockets of the same model and three sets of scraping mechanisms are installed at the lower end of the spiral shaft of the chain-lifting single spiral classifier. The three sets of scraping mechanisms are installed in the middle and on both sides of the two large sprockets. The two large sprockets and the three sets of scraping mechanisms are all installed at the lower end of the spiral shaft through flat keys and rotate with the spiral shaft. Each set of scraping mechanisms is composed of a scraper sleeve and a plurality of scrapers welded together.

[0008] The chain lifting system of the chain lifting single spiral classifier consists of a lifting bracket, a lifting trolley, an electric hoist and two chains of equal length. The lifting bracket is installed on the outer side of the lower end of the U-shaped groove, the lifting trolley is installed between the two guide rails of the lifting bracket, and the two small sprockets at both ends of the lifting trolley are respectively connected to the two large sprockets through two chains of equal length. The lifting wheels at both ends of the lifting trolley are in rolling contact with the guide rails. The electric hoist is hung in the middle position of the upper crossbeam of the lifting bracket, and the lower end of the electric hoist chain is hung in the middle position of the horizontal beam of the lifting trolley.

[0009] The lifting bracket of the chain system of the chain lifting single spiral classifier is composed of four guide rails, two lower connecting rods, two upper connecting rods and an upper connecting beam. The four lifting guide rails are welded in parallel on both sides of the U-shaped groove and perpendicular to the U-shaped groove. Two guide rails form a group and are welded on one side of the U-shaped groove. The top of each group of guide rails is welded as a whole with an upper connecting rod, and the two guide rails of each group are connected as a whole with a lower connecting rod in the middle. The upper end connecting rods of the two groups of guide rails are connected as a whole with a connecting beam.

[0010] The lifting trolley of the lifting system of the chain-lifting single spiral classifier is composed of two completely identical small sprocket groups, a horizontal beam and four supporting plates, each small sprocket group is composed of two lifting wheels, a small sprocket, a sprocket shaft, a long locating sleeve, a short locating sleeve, a shaft end locating sleeve and a locating pin. The four supporting plates are divided into two groups and are respectively welded to the lower planes at both ends of the horizontal beam. At the same time, the lower end of one supporting plate in each group of supporting plates is welded as one with the long locating sleeve, and the lower end of the other supporting plate is welded as one with the short locating sleeve. A bearing is installed inside the small sprocket, and the long locating sleeve and the short locating sleeve in each small sprocket group are located on both sides of the small sprocket. The two lifting wheels are located on the outside of the long locating sleeve and the short locating sleeve. A bearing is installed inside each lifting wheel, and each lifting wheel has a wheel edge. Each sprocket shaft is installed in the small sprocket bearing hole, the two lifting wheel bearing holes, the long locating sleeve hole and the short locating sleeve hole. The shaft end locating sleeve is installed at one end of the sprocket shaft, and a locating pin is installed.

[0011] The beneficial effects of the present invention are:

[0012] 1. A sprocket is installed at the lower end of the spiral shaft, which overcomes the problems existing in the original bearing installation, eliminates the wear of the bearing, nylon seat and shaft head caused by ore particles, reduces the cost of accessories, and reduces the maintenance workload.

[0013] 2. Two chains of equal length are used to lift the spiral shaft obliquely upward, which stabilizes the lower end of the spiral shaft and helps improve the working efficiency of the classifier.

[0014] 3. The use of chain lifting mechanism is beneficial to improve the service life of the equipment.

[0015] BRIEF DESCRIPTION OF THE DRAWINGS The specific embodiments of the present invention are described below with reference to the accompanying drawings:

[0016] Figure 1 Schematic diagram of the longitudinal section structure of the chain-lifting single spiral classifier

[0017] Figure 2 Cross-sectional structural diagram of the lifting system of the chain-lifting single spiral classifier

[0018] Figure 3 Schematic diagram of the A-direction and B-direction structure of the chain-lifting single spiral classifier

[0019] Figure 4 Chain lifting single spiral classifier chain lifting system top view cross-sectional structure diagram

[0020] Among them, 1-U-shaped groove, 2-bracket, 3-articulated shaft, 4-power mechanism, 5-screw shaft, 6-screw blade, 7-scraping mechanism, 8-chain, 9-lifting trolley, 10-lifting bracket, 11-electric hoist, 12-large sprocket, 13-scraper sleeve, 14-scraper, 15-flat key, 16-lifting wheel, 17-small sprocket, 18-sprocket shaft, 19-small sprocket short positioning sleeve, 20-support plate, 21-lifting guide rail lower connecting rod, 22-lifting trolley horizontal beam, 23-lifting trolley guide rail, 24-lifting guide rail upper connecting rod, 25-lifting bracket upper connecting beam, 26-small sprocket long positioning sleeve, 27-shaft end positioning sleeve, 28-shaft end positioning pin, 29-chain lifting system, 30-small sprocket group DETAILED DESCRIPTION

[0021] 1. Start the power mechanism (4), the spiral shaft (5) and the spiral blade (6) start to rotate, and the large sprocket (12), the small sprocket (17), the scraping mechanism (7) and the chain (8) start to rotate.

[0022] 2. Start the electric hoist (11), slowly lower the lifting trolley (9), the lower ends of the spiral shaft (5) and the spiral blade (6) are synchronously lowered, and at the same time, the scraping mechanism (7) scrapes away the accumulated raw ore below the large sprocket (12), making it easier for the large sprocket (12) to descend. When the spiral shaft (5) and the spiral blade (6) are lowered to the lowest position, the electric hoist (11) is stopped, and at this time, the horizontal beam (22) of the lifting trolley (9) just contacts the lower connecting rod (21) of the lifting guide rail (23).

[0023] 3. When preparing to stop the machine, start the electric hoist (11) to lift the lifting trolley (9). Under the action of the chain (8), the lower ends of the screw shaft (5) and the screw blade (6) begin to rise. When they reach a certain height, stop the electric hoist (11).

[0024] 4. Stop the power mechanism (4) from working.

Claims

1. A chain-lifting single spiral classifier comprises a U-shaped groove (1), a bracket (2), a power mechanism (4), an articulated shaft (3), a spiral shaft (5), a spiral blade (6) and a chain-lifting system (29), wherein the bracket (2) is mounted below the U-shaped groove (1) and the power mechanism (4), the driving shaft of the power mechanism (4) and the spiral shaft (5) rotate together, the power mechanism (4) and the spiral shaft (5) are hinged to the bracket (2) through the articulated shaft (3), two large sprockets (12) are mounted at the lower end of the spiral shaft (5), and the chain-lifting system (29) comprises a lifting bracket (10), a lifting trolley (9), an electric hoist (11) and two chains (8) of equal length, and is characterized in that: A chain lifting system (29) is installed at the lower end of the U-shaped groove (1).

2. The chain-lifting single spiral classifier according to claim 1 is characterized in that: Two large sprockets (12) of the same model and three sets of scraping mechanisms (7) are installed at the lower end of the spiral shaft (5). The three sets of scraping mechanisms (7) are installed in the middle and on both sides of the two large sprockets (12). The two large sprockets (12) and the three sets of scraping mechanisms (7) are installed at the lower end of the spiral shaft (5) through a flat key (15) and rotate with the spiral shaft (5). Each set of scraping mechanisms (7) is composed of a scraper sleeve (13) and a plurality of scrapers (14) welded together.

3. The chain-lifting single spiral classifier according to claim 1 is characterized in that: The chain lifting system (29) is composed of a lifting bracket (10), a lifting trolley (9), an electric hoist (11) and two chains (8) of equal length. The lifting bracket (10) is installed on the outer side of the lower end of the U-shaped groove (1), the lifting trolley (9) is installed between two guide rails (23) of the lifting bracket (10), two small sprockets (17) at both ends of the lifting trolley (9) are respectively connected to two large sprockets (12) through two chains (8) of equal length, the lifting wheels (16) at both ends of the lifting trolley (9) are in rolling contact with the guide rails (23), the electric hoist (11) is hung at the middle position of the upper cross beam (25) of the lifting bracket (10), and the lower end of the chain of the electric hoist (11) is hung at the middle position of the horizontal beam (22) of the lifting trolley.

4. The chain-lifting single spiral classifier according to claim 1 is characterized in that: The lifting bracket (10) of the chain lifting system (29) is composed of four guide rails (23), two lower connecting rods (21), two upper connecting rods (24) and an upper connecting crossbeam (25). The four lifting guide rails (23) are welded in parallel on both sides of the U-shaped groove (1) and are perpendicular to the U-shaped groove. Two guide rails (23) form a group and are welded on one side of the U-shaped groove (1). The top of each group of guide rails (23) is welded into one body by an upper connecting rod (24), and the two guide rails (23) of each group are connected into one body by a lower connecting rod (21) in the middle. The upper end connecting rods (24) of the two groups of guide rails (23) are connected into one body by a connecting crossbeam (25).

5. The chain-lifting single spiral classifier according to claim 1 is characterized in that: The lifting trolley (9) of the lifting system (29) is composed of two identical small sprocket groups (30), a horizontal beam (22) and four support plates (20). Each small sprocket group (30) is composed of two lifting wheels (16), a small sprocket (17), a sprocket shaft (18), a long positioning sleeve (26), a short positioning sleeve (19), an axis end positioning sleeve (27) and a positioning pin (28). The four support plates (20) are divided into two groups and are respectively welded to the lower planes at both ends of the horizontal beam (22). At the same time, the lower end of one support plate (20) in each group of support plates (20) is welded to the long positioning sleeve (26) as a whole, and the lower end of the other support plate (20) is welded to the long positioning sleeve (26). The small sprocket (17) is welded to a whole with the short positioning sleeve (19), a bearing is installed inside the small sprocket (17), a long positioning sleeve (26) and a short positioning sleeve (19) in each small sprocket group (30) are located on both sides of the small sprocket (17), two lifting wheels (16) are located outside the long positioning sleeve (26) and the short positioning sleeve (19), a bearing is installed inside each lifting wheel (16), each lifting wheel (16) has a wheel edge, each sprocket shaft (18) is installed in the bearing hole of the small sprocket (17), the bearing holes of the two lifting wheels (16), the long positioning sleeve (26) hole and the short positioning sleeve (19) hole, the shaft end positioning sleeve (27) is installed at one end of the sprocket shaft (18), and a positioning pin (28) is installed.

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