Hydroxyethyl cellulose product crushing and screening system

Abstract

The utility model discloses a hydroxyethyl cellulose product crushing and screening system which comprises a crushing mechanism, a flow control mechanism and a rotary vibration screen which are sequentially connected in the longitudinal direction, and the side portion of the rotary vibration screen is connected with the crushing mechanism through a backflow pipe. The flow control mechanism comprises a flow control shell, a plurality of sets of pore plates are installed in the flow control shell in the vertical direction, and each set of pore plates comprises two pore plates which are oppositely arranged. The spin vibration screen comprises a spin vibration shell, a screen is arranged in the spin vibration shell, an open hole connected with the bottom end of the backflow pipe is formed in the position, at the same height as the screen, of the side wall of the spin vibration shell, and an electromagnetic switch valve and an air blower are arranged at the position, close to the open hole, of the backflow pipe. According to the crushing and screening system provided by the utility model, the control on the powder flow can be realized, so that the rotary vibration screen exerts the maximum screening efficiency; screened large-particle materials can automatically flow back and then are crushed, the screened large-particle materials do not need to be manually treated, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a pulverizing and screening system for hydroxyethyl cellulose products, belonging to the field of hydroxyethyl cellulose production technology. Background Technology

[0002] Hydroxyethyl cellulose is a white or pale yellow, tasteless, and non-toxic fibrous or powdery solid. It is prepared by etherification of basic cellulose and ethylene oxide (or chloroethanol) and belongs to the non-ionic soluble cellulose ethers.

[0003] The production of hydroxyethyl cellulose powder requires a pulverizer and a vibrating screen. The material enters the vibrating screen after being pulverized. Currently, the feed velocity at the pulverizer's inlet is fixed and cannot be adjusted. During the screening process, an excessively fast feed velocity can cause powder accumulation, breakage, and failure to remove fine powder from the vibrating screen. Conversely, an excessively slow feed velocity can result in insufficient utilization of the vibrating screen's efficiency, leading to slow screening.

[0004] During the screening process, some large particles cannot pass through the screen. If not cleaned in time, they will accumulate and affect the screening speed. The existing technical measures are manual inspection and periodic cleaning, which are time-consuming, labor-intensive, unreliable, and can affect output if cleaning is not timely.

[0005] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] This invention addresses the shortcomings of the prior art by providing a hydroxyethyl cellulose product crushing and screening system. It can control the powder flow rate, maximizing the screening efficiency of the vibrating screen. It can also automatically return large particles from the screen for further crushing, eliminating the need for manual handling of these large particles and improving production efficiency.

[0007] To solve the above technical problems, the present invention adopts the following technical solution:

[0008] A hydroxyethyl cellulose product pulverizing and screening system includes a pulverizing mechanism, a flow control mechanism, and a vibrating screen connected in sequence along the longitudinal direction. The side of the vibrating screen is connected to the pulverizing mechanism through a return pipe.

[0009] The flow control mechanism includes a flow control housing, inside which multiple sets of orifice plates are installed in the vertical direction, each set of orifice plates including two orifice plates arranged in opposite directions;

[0010] The vibrating screen includes a vibrating shell, inside which is a screen. The side wall of the vibrating shell, at the same height as the screen, has an opening that connects to the bottom of the return pipe. An electromagnetic switch valve and a blower are installed near the opening in the return pipe.

[0011] Furthermore, the top of the flow control housing is connected to the discharge port of the crushing mechanism, and the bottom discharge port of the flow control housing is connected to the inlet of the vibrating screen.

[0012] Furthermore, adjacent sets of orifice plates are arranged at equal intervals, and the orifice plates penetrate the side wall of the flow control housing.

[0013] Furthermore, the two orifice plates are connected to pneumatic push rods on their opposite outer sides.

[0014] Furthermore, the pneumatic push rod is fixed horizontally above the bracket, which is fixed to the outer wall of the flow control housing.

[0015] Furthermore, the apertures of multiple sets of perforated plates along the vertical direction are successively reduced or increased.

[0016] Furthermore, the crushing mechanism is equipped with a feeding hopper.

[0017] Furthermore, the top end of the return pipe is provided with an extension pipe, which is inclinedly arranged on the inner wall of the feed hopper.

[0018] Furthermore, a discharge port is provided on one side of the bottom of the rotary vibrating housing.

[0019] Compared with the prior art, the present invention, by adopting the above technical solution, has the following advantages:

[0020] After being crushed by the crushing mechanism, the material enters the vibrating screen through the flow control mechanism. By controlling the pneumatic push rod, the orifice plates of different diameters are extended into the flow control housing. The flow rate of the powder is controlled by the orifice diameter. The larger the orifice diameter, the faster the flow rate, and the smaller the orifice diameter, the slower the flow rate. This avoids the problem of incomplete screening caused by excessively fast material flow rate and the problem of incomplete screening caused by powder accumulation on the screen, and avoids the problem of insufficient utilization of the vibrating screen efficiency caused by excessively slow material flow rate. This allows the vibrating screen to achieve the maximum screening efficiency.

[0021] The electromagnetic switch valve opens at a set time. Once opened, the blower can automatically return the large particles screened out to the feed hopper along the return pipe for re-crushing and screening. This eliminates the need for manual handling of the large particles screened out, thus improving production efficiency.

[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the flow control mechanism;

[0025] Figure 3 This is a schematic diagram of the connection between the vibrating screen and the return pipe.

[0026] In the diagram, 1-crushing mechanism, 11-feed hopper; 2-flow control mechanism, 21-flow control housing, 22-orifice plate, 23-pneumatic push rod, 24-bracket; 3-vibrating screen, 31-vibrating housing, 32-screen, 33-discharge port; 4-return pipe; 5-electromagnetic switch valve; 6-blower; 7-extension pipe. Detailed Implementation

[0027] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0028] like Figures 1-3 As shown in the figure, this utility model provides a hydroxyethyl cellulose product crushing and screening system, including a crushing mechanism 1, a flow control mechanism 2 and a vibrating screen 3 connected in sequence along the longitudinal direction. The side of the vibrating screen 3 is connected to the crushing mechanism 1 through a return pipe 4.

[0029] The crushing mechanism 1 is equipped with a feeding bin 11, through which materials enter the crushing mechanism 1 for crushing.

[0030] The flow control mechanism 2 includes a flow control shell 21. The top of the flow control shell 21 is connected to the discharge port of the crushing mechanism 1, and the bottom discharge port of the flow control shell 21 is connected to the inlet of the vibrating screen 3.

[0031] Multiple sets of orifice plates 22 are installed vertically inside the flow control housing 21. Adjacent sets of orifice plates 22 are arranged at equal intervals. Each set of orifice plates 22 includes two orifice plates 22 arranged facing each other. The orifice plates 22 penetrate the side wall of the flow control housing 21.

[0032] The two orifice plates 22 are connected to pneumatic push rods 23 on their opposite outer sides. The pneumatic push rods 23 are fixed horizontally above the bracket 24, which is fixed to the outer wall of the flow control housing 21. The extension and retraction of the pneumatic push rods 23 causes the two orifice plates 22 to move towards or away from each other.

[0033] The orifice diameters of multiple sets of orifice plates 22 along the vertical direction are successively reduced or increased. By extending orifice plates 22 with different orifice diameters into the flow control housing 21, the powder flow rate is controlled by the orifice diameter; the larger the orifice diameter, the faster the flow rate, and the smaller the orifice diameter, the slower the flow rate.

[0034] The vibrating screen 3 includes a vibrating shell 31, inside which a screen 32 is provided. The side wall of the vibrating shell 31 is provided at the same height as the screen 32, and an opening is provided to connect to the bottom end of the return pipe 4. An electromagnetic switch valve 5 and a blower 6 are installed near the opening in the return pipe 4.

[0035] The electromagnetic switch valve 5 opens at a set time. After it opens, the blower 6 can return large particles of material to the feed hopper 11 along the return pipe 4 for re-crushing.

[0036] The top end of the return pipe 4 is provided with an extension pipe 7, which is inclinedly set on the inner wall of the feed hopper 11. The airflow carrying large particles is blown out through the extension pipe 7. The extension pipe 7 is inclined downward, which can also provide power for the vertical flow of materials in the feed hopper 11.

[0037] The bottom side of the rotary vibrating housing 31 is provided with a discharge port 33.

[0038] The specific working principle of this utility model is as follows:

[0039] After being pulverized by the pulverizing mechanism 1, the hydroxyethyl cellulose product enters the vibrating screen 3 via the flow control mechanism 2. By controlling the pneumatic pusher 23, orifice plates 22 with different apertures are extended into the flow control housing 21. The flow rate of the powder is controlled by the aperture size; the larger the aperture, the faster the flow rate, and the smaller the aperture, the slower the flow rate. This avoids the problem of incomplete sieving caused by excessively fast feed flow rate leading to powder accumulation on the screen 32, and avoids the problem of insufficient utilization of the vibrating screen 3's efficiency by excessively slow feed flow rate, thus maximizing the sieving efficiency of the vibrating screen 3.

[0040] The electromagnetic switch valve 5 opens at a set time. After opening, the blower 6 can automatically return the large particles of material screened out to the feed hopper 11 along the return pipe 4 for re-crushing and screening. This eliminates the need for manual handling of the large particles screened out, thus improving production efficiency.

[0041] The above description provides examples of the preferred embodiments of this utility model. Any aspects not detailed herein are common knowledge to those skilled in the art. The scope of protection of this utility model is determined by the claims. Any equivalent modifications based on the technical teachings of this utility model are also within the scope of protection of this utility model.

Claims

1. A hydroxyethyl cellulose product comminution and classification system characterized by: The device comprises a crushing mechanism (1), a flow control mechanism (2) and a rotary vibrating screen (3) connected in sequence along the longitudinal direction, and the rotary vibrating screen (3) is connected with the crushing mechanism (1) through a backflow pipe (4); The flow control mechanism (2) comprises a flow control shell (21), and a plurality of groups of orifice plates (22) are mounted in the flow control shell (21) along the vertical direction; each group of orifice plates (22) comprises two orifice plates (22) arranged oppositely; The rotary vibrating screen (3) comprises a rotary vibrating shell (31), and a screen (32) is arranged in the rotary vibrating shell (31); an opening is arranged on the side wall of the rotary vibrating shell (31) at the same height as the screen (32) and is connected with the bottom end of the backflow pipe (4); an electromagnetic switch valve (5) and a blower (6) are arranged on the backflow pipe (4) close to the opening.

2. A hydroxyethyl cellulose product comminution and classification system as defined in claim 1, characterized in that: The top of the flow control shell (21) is connected with the discharge port of the crushing mechanism (1), and the bottom discharge port of the flow control shell (21) is connected with the inlet of the rotary vibrating screen (3).

3. A hydroxyethyl cellulose product comminution and classification system as defined in claim 1, wherein: The two groups of orifice plates (22) are arranged at equal intervals, and the orifice plates (22) are arranged through the side wall of the flow control shell (21).

4. A hydroxyethyl cellulose product comminution and classification system as defined in claim 1, wherein: The opposite outer sides of the two orifice plates (22) are respectively connected with pneumatic push rods (23).

5. A hydroxyethyl cellulose product comminution and classification system as defined in claim 4, wherein: The pneumatic push rods (23) are fixedly connected to the upper side of a bracket (24) along the horizontal direction, and the bracket (24) is fixedly connected to the outer wall of the flow control shell (21).

6. A hydroxyethyl cellulose product comminution and classification system as defined in claim 1, wherein: The orifice diameters of the plurality of groups of orifice plates (22) are gradually reduced or increased along the vertical direction.

7. A hydroxyethyl cellulose product comminution and classification system as defined in claim 1, wherein: The crushing mechanism (1) is provided with a feeding bin (11).

8. A hydroxyethyl cellulose product comminution and classification system as defined in claim 7, characterized by: The top end of the backflow pipe (4) is provided with an extension pipe (7), and the extension pipe (7) is arranged obliquely on the inner wall of the feeding bin (11).

9. A hydroxyethyl cellulose product comminution and classification system as defined in claim 1, wherein: The bottom side of the rotary vibrating shell (31) is provided with a discharge port (33).

Images