A kind of relaxation screen segmented movable beam amplitude adjustment device

Abstract

The invention discloses an amplitude adjusting device of a flip-flow screen sectional type walking beam. The amplitude adjusting device comprises an upper supporting base, a lower supporting base, rubber assemblies, walking beam connection plates and pretightening force adjustors. The upper supporting base and the lower supporting base are connected with a screen box side plate through ring-grooved lock bolts. The rubber assemblies comprise upper connection plates, shear rubber, lower connection plates and wear-resisting inserting sleeves. The upper connection plates make contact with the pretightening force adjusters. The upper connection plates, the lower connection plates and the shear rubber are fixedly connected through powerful glue. The lower connection plates are connected with the walking beam connection plates. The wear-resisting inserting sleeves are fixedly connected with the connection plates. The pretightening force adjusters are composed of fixed limiting stoppers, anti-loosening elastic pads and locking nuts. The fixed limiting stoppers are located among the upper supporting bases, the lower supporting bases and the connection plates. The locking nuts are arranged above the anti-loosening elastic pads. By means of the pretightening force adjusters, the pretightening force of the shear rubber can be independently adjusted, and the amplitude adjusting device can broaden the amplitude range of the walking beam and has the advantages of being high in adaptability, easy to adjust, convenient to mount and the like.

Description

technical field [0001] The invention relates to the field of vibrating screening equipment, in particular to a segmental movable beam amplitude adjustment device for a relaxation screen, which can realize segmental independent adjustment of the amplitude of a movable beam on a relaxation screen. Background technique [0002] The relaxation screen is a new type of screening machine developed from the traditional circular vibrating screen in the early 1980s. The screen is made of stretchable polyurethane rubber material. When working, the screen is alternately tensioned and loosened to make the material move forward and bounce, which can prevent the material from sticking to the screen and blocking the screen holes. At the same time, due to the use of flexible sieve plates, the projectile acceleration can reach 30-50 times the acceleration of gravity, and the maximum amplitude of the sieve plate can reach 40mm, so the sieve holes are not only not easy to be blocked, but also t...

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Problems solved by technology

Chinese existing patents have also proposed some active beam connection design schemes of the relaxation screen, such as the Chinese patent application number 97235985.0, which proposes a suspension type bilateral drive relaxation screen, which is rigidly connected except for the screen, which is not conducive to extending The service life of the relaxation screen, the outer screen frame and the inner frame are both integrally designed, and the quality of the outer screen frame and the inner frame is required to be equal, the size of the screen holes is arranged according to the law of the probability of passing through the screen, and the requirements for manufacturing accuracy are high; the application number is The Chinese patent of 201310574957.2 discloses a relaxation vibrating screen in which evenly distributed shears are respectively installed on the upper and lower joint surfaces between the polyurethane screen and the resonant frame, and there is no clear installation and adjustment device. Placed under the screen frame, it occupies a large working space, and the position of the excitation center and the center of mass is quite different, which is not conducive to the stability of the work; the Chinese patents with application numbers 201220392205.5, 201220390817.0, and 201220390809.6 respectively proposed Ori The single-layer, double-layer and three-layer relaxation screens designed by (Tianjin) Technology Co., Ltd., the Chinese patents with application numbers 201320019829.7, 201320019702.5, 201320019852.6, and 201320019957.1 proposed the single-layer and double-layer screens designed by Qinhuangdao Yogma Industrial Technology Co., Ltd. The main part of these designs is similar, and the number of layers of polyurethane screens is increased on the basis of the original single layer, but the movable beams are rigidly connected by integral movable beam connecting plates. All movable beams can only produce forced vibration as a whole, and the preload of the shear rubber is not adjustable

Therefore, the vibration amplitude of the existing relaxation sieve moving beam not only cannot be adjusted in sections according to the actual working conditions, but also has a small adjustment range, which cannot meet the needs of the actual working conditions of the screening, and has poor adaptability

To sum up, all the movable beams in the existing relaxation screen are connected as a whole, which consumes a lot of energy in operation; the pre-tightening force of the shear rubber cannot be adjusted and it is inconvenient to disassemble and assemble, and cannot adapt to many working conditions and multi-section Amplitude requirements, amplitude adjustment range is small

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