Combined high-frequency fine screen

Abstract

The utility model relates to a combined high-frequency fine screen, and belongs to the technical field of fine particle material grading. According to the technical scheme, the screening machine comprises a machine frame (8), linear screens, a front-stage screen and a middle partition plate (13), the two linear screens are arranged on the lower portion of the machine frame (8), the front-stage screen is arranged on the upper portion of the machine frame (8), the two linear screens are arranged, the middle partition plate is arranged at a discharging port of the front-stage screen, and the discharging port of the front-stage screen is divided into two parts which are matched with feeding ports of the two linear screens respectively. The utility model has the beneficial effects that the preceding-stage screen on the upper layer is used for concentrating low-concentration material flow into high-concentration material flow, and the high-concentration material flow is fed into the linear screen on the lower layer for deep dehydration and press drying. A linear sieve is divided into two parts, the width of the sieve surface of each linear sieve is only half of the original width, the two linear sieves are matched with a preceding-stage sieve, the thickness of a material layer on the linear sieve is increased, the uniformity is good, and the moisture of a fine-fraction material after dehydration is reduced.

Description

Technical Field

[0001] The utility model relates to a combined high-frequency fine screen, belonging to the technical field of fine particle material classification. Background Art

[0002] Linear screens and electromagnetic screens are both commonly used vibrating screens, which are widely used in product grading in mining, building materials, transportation, energy, chemical and other industries. Combining the front-stage screen (electromagnetic screen) with the linear screen can reduce the ash content, achieve good dehydration effect, and save energy and protect the environment. For example, the Chinese utility model patents of the applicant CN 201621366693.7 are named "combined high-frequency fine screen" and CN201720255319.8 are named "a double-feed high-frequency combined fine screen" and so on; the front-stage screen is a grading device in which the single screen body does not participate in the vibration of the screen surface, and the linear screen is a grading device in which the screen body and the screen surface vibrate together. However, the existing technology is a combined screen composed of one or two electromagnetic screens located on the upper layer and a linear screen located on the lower layer. The above configuration requires that the screen surface width of the linear screen is relatively large. For the dehydration of fine-grained materials, the wider the screen surface of the linear screen that bears the main dehydration function, the thinner the distribution of the screen surface material, and it is easy to reduce the uniformity of the thickness of the material layer on the screen, resulting in a high moisture content of the fine-grained material after dehydration. Utility Model Content

[0003] The utility model aims to provide a combined high-frequency fine screen, which splits a linear screen into two parts, the screen surface width of each linear screen is only half of the original one, the two linear screens are matched with a front-stage screen, the material layer thickness on the linear screen is increased and uniform, the moisture content of the fine-grained material after dehydration is reduced, and the above-mentioned problems existing in the background technology are solved.

[0004] The technical solution of the utility model is:

[0005] A combined high-frequency fine screen comprises a frame, a linear screen, a front-stage screen and a middle partition. Two linear screens are arranged at the lower part of the frame, and a front-stage screen is arranged at the upper part of the frame. The two linear screens are arranged in parallel. A middle partition is arranged at the discharge port of the front-stage screen to divide the discharge port of the front-stage screen into two, which are matched with the feed ports of the two linear screens respectively.

[0006] The middle partition is fixed on the side wall of the front-stage screening outlet through a plurality of connecting rods.

[0007] The connecting rod is arranged vertically to the middle partition, and the connecting rod consists of a left connecting rod and a right connecting rod arranged in pairs, and the left connecting rod and the right connecting rod are respectively arranged on the left and right sides of the middle partition, one end of the left connecting rod on the left side of the middle partition is fixed on the middle partition, and the other end is fixed on the side wall on the left side of the front-stage screen outlet; one end of the right connecting rod on the right side of the middle partition is fixed on the middle partition, and the other end is fixed on the side wall on the right side of the front-stage screen outlet.

[0008] The connecting rods are in pairs and arranged in parallel with each other.

[0009] The front-stage screen is an electromagnetic screen.

[0010] The utility model has the following beneficial effects: the front-stage screen on the upper layer concentrates the low-concentration material flow into a higher-concentration material flow, and sends it to the linear screen on the lower layer for deep dehydration and pressing. A linear screen is split into two parts, and the screen width of each linear screen is only half of the original. Two linear screens are matched with a front-stage screen, and the material layer thickness on the linear screen is increased and uniform, and the moisture content of the fine-grained material after dehydration is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0012] Figure 2 It is a schematic side view of the structure of an embodiment of the utility model;

[0013] Figure 3 It is a schematic top view of the structure of an embodiment of the utility model;

[0014] In the figure: feeding box 1, electromagnetic screen body 2, rocker arm 3, electromagnetic screen driver 4, beater 5, flexible screen 6, net hook 7, frame 8, linear screen body 9, linear screen drive device 10, electromagnetic screen support 11, connecting rod 12, middle partition 13, receiving plate 14, linear screen plate 15, linear screen support spring 16, cross beam 17, side wall 18, feed inlet 19, and discharge port 20. DETAILED DESCRIPTION

[0015] The present invention will be further described below through embodiments in conjunction with the accompanying drawings.

[0016] A combined high-frequency fine screen comprises a frame 8, a linear screen, a front-stage screen and a middle partition 13. Two linear screens are arranged at the bottom of the frame 8, and a front-stage screen is arranged at the top of the frame 8. The two linear screens are arranged in parallel. A middle partition is arranged at the discharge port of the front-stage screen to divide the discharge port of the front-stage screen into two, which are matched with the feed ports of the two linear screens respectively.

[0017] The middle partition plate 13 is fixed to the side wall 18 of the front-stage screening outlet through a plurality of connecting rods 12 .

[0018] The connecting rod 12 is arranged perpendicularly to the middle partition 13, and the connecting rod consists of a left connecting rod and a right connecting rod arranged in pairs, and the left connecting rod and the right connecting rod are respectively arranged on the left and right sides of the middle partition 13, one end of the left connecting rod on the left side of the middle partition 13 is fixed to the middle partition 13, and the other end is fixed to the side wall on the left side of the front-stage screen outlet; one end of the right connecting rod on the right side of the middle partition 13 is fixed to the middle partition 13, and the other end is fixed to the side wall on the right side of the front-stage screen outlet.

[0019] The connecting rods 12 are provided in pairs and arranged in parallel with each other.

[0020] The front-stage screen is an electromagnetic screen, comprising a feed box 1, an electromagnetic screen body 2, a swing rod 3, an electromagnetic screen driver 4, a beater 5, a flexible screen 6 and a net-pulling hook 7. The electromagnetic screen body 2 is arranged obliquely on the upper part of the frame, the upper part of the electromagnetic screen body 2 is provided with a feed box 1, the lower part of the electromagnetic screen body 2 is a discharge port, and the discharge port matches the linear screen feed port at the lower part of the frame; the flexible screen 6 is arranged in the electromagnetic screen body 2 through the net-pulling hook 7; the side wall of the electromagnetic screen body 2 is provided with an electromagnetic screen driver 4, the electromagnetic screen driver 4 is connected to the beater 5 through the swing rod 3, and the beater 5 hits the flexible screen 6.

[0021] The rear end of the electromagnetic sieve body 2 is a discharge port 20 of the electromagnetic sieve, and a receiving plate 14 is provided at the discharge port 20. Two feeding boxes 1 are arranged at the front end of the electromagnetic sieve body 2 to feed materials to the electromagnetic sieve body 2 at the same time.

[0022] The linear screen comprises a linear screen body 9, a linear screen driving device 10, a linear screen plate 15 and a linear screen supporting spring 16. The linear screen body 9 is arranged horizontally, and the front part is a feed inlet 19 of the linear screen. The linear screen body 9 is provided with a linear screen plate 15. The linear screen driving device 10 is arranged above the linear screen plate 15 to drive the linear screen plate 15 to vibrate. The linear screen body 9 is arranged on the frame 8 through the linear screen supporting spring 16.

[0023] A crossbeam 17 is provided at the bottom of the frame, and the linear screen body 9 is arranged on the crossbeam 17 through the linear screen support spring 16.

[0024] The lower end of the tilted electromagnetic screen body 2 is hinged on the frame 8 through the electromagnetic screen support 11; the upper end of the electromagnetic screen body 2 is arranged on the frame 8 through a lifting support.

[0025] The material enters the electromagnetic screen body 2 through the feed box 1, and the electromagnetic screen driver 4 drives the beater 5 to hit the flexible screen 6 for vibration screening. The material on the screen is divided into two by the middle partition 13 through the discharge port 20 of the electromagnetic screen, and the material enters the feed port 19 of the two linear screens arranged at the lower part of the frame. The linear screen drive device 10 drives the linear screen plate 15 to vibrate, and the material on the linear screen plate 15 is vibrated and screened.

Claims

1. A combined high-frequency fine screen, characterized in that: The invention comprises a frame (8), a linear screen, a front-stage screen and a middle partition (13), wherein two linear screens are arranged at the bottom of the frame (8), and a front-stage screen is arranged at the top of the frame (8), the two linear screens are arranged in parallel, and a middle partition is arranged at the discharge port of the front-stage screen, so as to divide the discharge port of the front-stage screen into two, which are matched with the feed ports of the two linear screens respectively.

2. A combined high-frequency fine screen according to claim 1, characterized in that: The middle partition plate (13) is fixed to the side wall (18) of the front-stage screening outlet via a plurality of connecting rods (12).

3. A combined high-frequency fine screen according to claim 2, characterized in that: The connecting rod (12) is arranged perpendicularly to the middle partition (13), and is composed of a left connecting rod and a right connecting rod arranged in pairs. The left connecting rod and the right connecting rod are respectively arranged on the left and right sides of the middle partition (13). One end of the left connecting rod on the left side of the middle partition (13) is fixed to the middle partition (13), and the other end is fixed to the side wall on the left side of the front-stage screen outlet; one end of the right connecting rod on the right side of the middle partition (13) is fixed to the middle partition (13), and the other end is fixed to the side wall on the right side of the front-stage screen outlet.

4. A combined high-frequency fine screen according to claim 1 or 2, characterized in that: The front-stage screen is an electromagnetic screen.

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