Flow guide device for screening machine

Abstract

A flow guide device for a screening machine is characterized by comprising a screening machine middle frame and a flow guide strip, the screening machine middle frame is cylindrical and installed on the upper portion of a screen, the flow guide strip is spirally arranged in the screening machine middle frame, the bottom of the flow guide strip abuts against the screen in a sealed mode, and the center position of the flow guide strip corresponds to a powder inlet. And the tail end position of the flow guide strip corresponds to the powder outlet of the screening machine middle frame. The flow guiding device is simple and reasonable in structure and convenient to operate, the running path of powder on the screen is effectively prolonged through the spiral flow guiding strips, the effective screening area of the screen is increased, the screening efficiency is improved, and the flow guiding device can be used for screening of a single-layer screen and can also be used for screening of a multi-layer screen.

Description

Technical Field

[0001] The utility model relates to a screening machine, in particular to a diversion device for a screening machine. Background Art

[0002] In the powder making industry, it is necessary to screen powders according to the particle size of the powder particles. When using a three - element vibration screen for screening, the running track of the particles on the screen is short, the effective screening area of the screen is small, the screening efficiency is low, and the screen waste is serious.

[0003] At present, the screening of the three - element vibration screen mainly depends on adjusting the angle of the eccentric block at the bottom of the screening machine to increase the running path of the material on the screen as much as possible, so as to increase the effective screening area of the screen and improve the screening efficiency. However, since the running path of the material on the screen is affected not only by the angle of the eccentric block but also by the height of the screening machine, it is difficult to ensure that the running path of each layer of powder is long when using a multi - layer screen. Even when using a single - layer screen and adjusting the eccentric position to the best, its running path is still short, and the effective screening area of the screen is not high. Therefore, there are problems of low screening efficiency and serious screen waste.

[0004] Therefore, it is necessary to design a device that can improve the screening efficiency to solve the problems of low current screening efficiency and serious screen waste. Summary of the Invention

[0005] The technical problem to be solved by the utility model is to provide a diversion device for a screening machine with simple and reasonable structure and convenient operation aiming at the above - mentioned technical status, which can increase the effective screening area of the screen and improve the screening efficiency.

[0006] The technical solution adopted by the utility model to solve the above - mentioned technical problem is as follows: a diversion device for a screening machine, characterized in that: it includes a middle frame of the screening machine and diversion strips. The middle frame of the screening machine is cylindrical and is installed above the screen. The diversion strips are arranged in a spiral shape inside the middle frame of the screening machine. The bottom of the diversion strips abuts against the screen for sealing. The central position of the diversion strips corresponds to the powder inlet, and the end position of the diversion strips corresponds to the powder outlet of the middle frame of the screening machine.

[0007] As an improvement, the diversion strips and the middle frame of the screening machine are connected and fixed through fixing ribs. The bottom of the diversion strips is wrapped with silica gel strips, and the bottom of the diversion strips abuts against the screen for sealing through the silica gel strips.

[0008] Furthermore, the longitudinal section of the diversion strips is trapezoidal in reverse. The height of the diversion strips is lower than the height of the middle frame of the screening machine. The lower end surface of the silica gel strip is flush with the lower end surface of the middle frame of the screening machine. One end of the fixing rib is fixed on the inner wall of the middle frame of the screening machine, and the other end is fixed to the outermost circle of the diversion strips.

[0009] Furthermore, the height of the flow guide bar is 1 / 3 to 1 / 2 of the height of the middle frame of the sieve machine, and there are three to five fixing ribs, which are evenly spaced along the outermost circle of the flow guide bar.

[0010] Finally, the flow guide bar is eccentrically arranged within the middle frame of the sieve machine.

[0011] Compared with the prior art, the advantages of the present utility model are as follows: A spiral flow guide bar is provided, and the forced flow guiding method is adopted, so that the powder entering from the powder inlet runs according to the shape of the flow guide bar, greatly increasing the running path of the powder on the sieve mesh, increasing the effective screening area of the sieve mesh, and improving the screening efficiency; The bottom of the flow guide bar is wrapped with a silica gel strip, and the flow guide bar and the sieve mesh are sealed through the silica gel strip to prevent the powder from passing through the bottom of the flow guide bar; The flow guide bar is fixed to the middle frame of the sieve machine through fixing ribs to prevent the flow guide bar from vibrating with the sieve machine. The flow guide bar is eccentrically arranged, and there is no need to repeatedly adjust the angle of the eccentric block, making the operation simpler. The structure of the present utility model is simple and reasonable, the operation is convenient, the running path of the powder on the sieve mesh is effectively extended, the effective screening area of the sieve mesh is increased, and the screening efficiency is improved. The flow guiding device of the present utility model can be used for single-layer sieve mesh screening and also for multi-layer sieve mesh screening. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an embodiment of the present utility model;

[0013] Figure 2 is Figure 1 a cross-sectional view along line A-A. Detailed Embodiments

[0014] The present utility model will be further described in detail below in conjunction with the embodiments of the drawings.

[0015] As Figure 1 , 2 shown, a flow guiding device for a screening machine includes a middle frame 1 of the sieve machine and a flow guide bar 2. The middle frame 1 of the sieve machine is cylindrical and is installed above the sieve mesh. The flow guide bar 2 is arranged in a spiral shape within the middle frame 1 of the sieve machine. The bottom of the flow guide bar 2 abuts against the sieve mesh for sealing. The central position of the flow guide bar 2 corresponds to the powder inlet a, and the end position of the flow guide bar 2 corresponds to the powder outlet b of the middle frame 1 of the sieve machine.

[0016] The specific structure is as follows: the screen middle frame 1 is a part of the screen shell, which is installed on the upper part of the screen to prevent the powder from overflowing, and also plays the role of fixing the screen and the guide strip 2. The guide strip 2 is connected and fixed to the screen middle frame 1 by a fixing rib 3, and the bottom of the guide strip 2 is wrapped with a silicone strip 4. The bottom of the guide strip 2 is sealed against the screen by the silicone strip 4. The silicone strip 4 is set to prevent the powder from passing through the bottom of the guide strip 2. The longitudinal section of the guide strip 2 of this embodiment is an inverted trapezoid. The height of the guide strip 2 is lower than the height of the screen middle frame 1, which is about 1 / 3 to 1 / 2 of the height of the screen middle frame 1. The lower end surface of the silicone strip 4 is flush with the lower end surface of the screen middle frame 1. One end of the fixing rib 3 is fixed to the inner wall of the screen middle frame 1, and the other end is fixed to the outermost circle of the guide strip 2. In this embodiment, there are four fixed ribs 3, which are evenly spaced along the outermost circle of the guide bar 2. The function of the fixed ribs 3 is to fix the guide bar 2 and the screen middle frame 1 together to prevent the guide bar 2 from vibrating with the screen. The guide bar 2 is eccentrically arranged in the screen middle frame 1, and the eccentric direction is toward the powder outlet b of the screen middle frame 1, so that there is no need to repeatedly adjust the eccentric block angle, and the operation is simple.

[0017] During operation, the powder enters the center of the guide bar 2 from the powder inlet a of the screen machine. Under the action of the eccentric block of the screen machine, the powder gradually passes along the inner edge of the guide bar 2 and finally flows out from the powder outlet b of the screen machine middle frame 1.

[0018] Since the spiral guide strip 2 is provided and a forced guide method is adopted, the running path of the powder on the screen is effectively extended, the effective screening area of the screen is increased, and the screening efficiency is improved.

[0019] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A diversion device for a screening machine, characterized in that: It includes the middle frame of the screening machine and the diversion strip. The middle frame of the screening machine is cylindrical and is installed on the upper part of the screen. The diversion strip is arranged in a spiral shape inside the middle frame of the screening machine. The bottom of the diversion strip abuts against and seals the screen. The central position of the diversion strip corresponds to the powder inlet, and the end position of the diversion strip corresponds to the powder outlet of the middle frame of the screening machine.

2. The diversion device for a screening machine according to claim 1, characterized in that: The diversion strip and the middle frame of the screening machine are fixedly connected through fixing ribs. The bottom of the diversion strip is wrapped with a silica gel strip, and the bottom of the diversion strip abuts against and seals the screen through the silica gel strip.

3. The diversion device for a screening machine according to claim 2, characterized in that: The longitudinal section of the diversion strip is trapezoidal in reverse. The height of the diversion strip is lower than the height of the middle frame of the screening machine. The lower end surface of the silica gel strip is flush with the lower end surface of the middle frame of the screening machine. One end of the fixing rib is fixed on the inner wall of the middle frame of the screening machine, and the other end is fixed to the outermost circle of the diversion strip.

4. The diversion device for a screening machine according to claim 3, characterized in that: The height of the diversion strip is 1 / 3 to 1 / 2 of the height of the middle frame of the screening machine. There are three to five fixing ribs, which are evenly spaced along the outermost circle of the diversion strip.

5. The diversion device for a screening machine according to any one of claims 1 to 4, characterized in that: The diversion strip is eccentrically arranged inside the middle frame of the screening machine.

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