RU2135052C1 - Device for mixing loose materials - Google Patents

Abstract

FIELD: agricultural production; production of building materials; pharmaceutical industry. SUBSTANCE: mixing assembly in device is made as plate positioned in jacket and coupled kinematically to vertical displacement mechanism. Plate carries brackets with rollers interacting successively with transverse flexible ribs mounted on conveyor belt. Rollers are installed at space increasing uniformly, total increment of roller space being less than space between ribs of conveyor belt. EFFECT: simplified construction higher efficiency. 5 dwg

Description

 The present invention is intended for use in agricultural production, the production of building materials, the pharmaceutical industry and in other fields.

 Known bitter-screw mixer continuous operation, comprising a housing, helical and blade shafts and drives [1]. The mixing of materials is carried out by rotating in one direction of the helical and blade shafts. Rotating at different speeds from individual drives, they ensure the movement of materials from the feed hopper to the discharge opening with a partial return of the mixture back to increase longitudinal mixing and uniformity of the mixture. A blade shaft rotating at a faster speed than a helical one throws the mixed mass onto the screw auger.

 The disadvantages of this mixer should include the complexity of its device. To obtain a mixture of good quality, you need a long time in the working area, for which the mixture must be passed through the device several times. The process of mixing bulk materials, differing in mass ratios of tens of times, is especially long. At the same time, the productivity of the process is sharply reduced.

 Known mixer bulk materials, taken as a prototype [2], containing a chain conveyor, a roller system, a tape and a drive.

 Mixing is carried out on a conveyor belt, making a movement like "traveling wave". To intensify the mixing processes, a chain conveyor, the rollers of which interact with the tape, makes a swinging motion relative to the axis of the drive sprockets. The disadvantages of this mixer include a complex design, and the wave-like movement of the tape leads to its rapid wear.

 In addition, the mixing efficiency is low, especially with respect to the starting materials, which differ by a tenfold cash ratio.

 The purpose of the invention is the creation of an aggregate for mixing bulk materials having a simple design and high quality mixing. This goal is achieved by the fact that in the device for mixing bulk materials containing dispensers, a mixing unit with a conveyor belt and a drive, the mixing unit is made in the form of a plate placed in a casing kinematically connected with a vertical movement mechanism. Brackets are mounted on the plate with rollers sequentially interacting with transverse elastic ribs mounted on the conveyor belt, while the rollers are mounted with a uniformly increasing pitch, and the total increase in the pitch of the rollers is less than the pitch of the edges of the conveyor belt.

 In FIG. 1 shows a device for mixing bulk materials.

 In FIG. 2 is a view of FIG. 1 along arrow A.

 In FIG. 3, 4, 5 — view of FIG. 2 along arrow B.

 The sequential operation of the elastic edges of the conveyor belt during its movement and the movement of the discarded particles of bulk material are shown.

 The unit contains drums 1 with a conveyor belt 2 provided with transverse elastic ribs 3. On the conveyor frame are installed: a drive 4, dispensers 5, 6 and a mixing unit 7. A drive roller 8 is installed behind the dispenser 5 above the tape to destroy the packed pieces of bulk material and at the same time smooth out its surface. At the outlet of the dispenser 6 there is a plate 9 for smoothing the surface of the bulk material supplied by the dispenser 6.

 The mixing unit 7 consists of a plate 10, on which guides 11 are mounted, mounted in a plain bearing 12. On the lower surface of the plate 10 are mounted brackets 13 with freely rotating rollers 14.

 The installation level of the plate 10 is adjusted using the handwheel 15 through a pair of bevel gears 16, an asterisk 17 and a chain 18 connected to the sprockets 19, interacting with the screws fixed to the plate 20. The mixing unit 7 is placed in the casing 21.

 The operation of the device.

 The components to be mixed (for example, peat, mineral fertilizers, etc.) from dispensers 5 and 6 are fed to the conveyor belt and laid out in layers on the tape. When passing under the drive roller 8, large pieces of bulk material are destroyed and their surface is smoothed.

 From the dispenser 6 with a low consumption of material, as a rule these are mineral fertilizers, a layer of the second bulk material is applied to the surface formed by the roller 8. Its surface is smoothed by a plate 9.

 Further, the conveyor belt with bulk material passes under the mixing unit 7. The rollers of the mixing unit are arranged in increments uniformly increasing by a constant amount. The total increment of the step of the rollers is less than the step of the edges of the tape. With this arrangement of the rollers of the mixing unit, for the course of the tape equal to the maximum pitch of the rollers, a group of elastic ribs of the conveyor belt is successively triggered in an amount equal to the number of rollers of the mixing unit. This involves the mixing of layers of bulk materials located in the gap adjacent to the working rib, and the sequential transfer of particles of bulk material from one cell between the ribs to the front edge of the next conveyor belt. In this case, intensive mixing of layers of bulk material occurs.

 In FIG. 3 shows the relative position of the edges of the conveyor belt and the rollers of the mixing unit at the beginning of one of the cycles. Rib 3 is in the maximum bent position. The mixture in cells 4-5, 5-6 and 6-7 was obtained in the previous cycle.

 In FIG. 4 shows the relative position of the edges of the conveyor belt and the rollers of the mixing unit at the moment of operation of the rib 3. The mixture is thrown forward along the belt and partially up. The jets hit the surface of the plate, are reflected at an angle downward, intersecting with each other and with the jets thrown forward, with a slight inclination upward. In this case, intensive mixing occurs.

 In FIG. 5 shows the same process as in FIG. 4, when working out the ribs 4 and so on until the number of ribs is equal to the number of rollers of the mixing unit.

 Sequential rather than simultaneous operation of the conveyor ribs reduces the load on the belt and reduces the required motor power.

 In addition, with successive operation of the conveyor ribs, along the belt, the mixture is partially thrown over the next rib and the space between the mixture and the rib formed during the rib bending is filled.

 To increase the efficiency of filling empty space, raising or lowering the slab 10 with the hand wheel 15 is provided. In addition, changing the height of the slab is used to set the maximum mixing efficiency.

 The device for mixing bulk materials, simple in design, provides high performance and mixing quality.

Sources of information:
1. Kunta G.M. The technology of processing and preparation of feed. M. Kolos, 260, 1978

 2. SU A.S. 1491733 A1, cl. B 28 C 5/34, 07/07/89.

Claims (1)

 A device for mixing bulk materials containing dispensers, a mixing unit with a conveyor belt and a drive, characterized in that the mixing unit is made in the form of a plate placed in a casing kinematically connected with a vertical movement mechanism, and brackets are fixed to the plate with rollers sequentially interacting with installed on the conveyor belt with transverse elastic ribs, while the rollers are installed with a uniformly increasing pitch, and the total increase in the pitch of the rollers is less than the pitch of the ribs of the tape sportera.

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