CN203438523U

CN203438523U - Automatic screen replacer

Info

Publication number: CN203438523U
Application number: CN201320472806.1U
Authority: CN
Inventors: 刘璞; 张健; 林炳锵
Original assignee: ZHANGJIAGANG AMSTAR SANWA MACHINERY CO Ltd; SHANGHAI SHENJIA SANWA CO Ltd
Current assignee: ZHANGJIAGANG AMSTAR SANWA MACHINERY CO Ltd; SHANGHAI SHENJIA SANWA CO Ltd
Priority date: 2013-08-02
Filing date: 2013-08-02
Publication date: 2014-02-19
Anticipated expiration: 2023-08-02

Abstract

The utility model discloses an automatic screen replacer which comprises a screen replacement body, two electro-hydraulic push rods, an upper sliding column, a lower sliding column, a coarse screen, a fine screen and pressure sensors, wherein two axial through holes are formed in the screen replacement body; the upper sliding column and the lower sliding column are respectively arranged in the corresponding axial through holes and are provided with screen chambers; a material outlet and a material inlet are respectively formed in the centers of the left side surface and the right side surface of the screen replacement body and are respectively communicated with the screen chambers in the upper sliding column and the lower sliding column through two straight runners; the front ends of the upper sliding column and the lower sliding column are fixedly connected with piston rods of the corresponding electro-hydraulic push rods respectively; the coarse screen and the fine screen are arranged in the inner cavities of the screen chambers; each pressure sensor is arranged on the inner wall at the center of each axial through hole. The automatic screen replacer always keeps one channel smooth to realize non-stopping continuous and automatic screen replacement, can automatically detect channel pressure through the pressure sensors and quickly backwash dirty materials and is high in speed of replacing the coarse screen and the fine screen.

Description

Automatic net-changing device

Technical field

The automatic net-changing device of continuous class extruder when the utility model relates to a kind of plastifying material and flows through filter screen, foreign particle and contaminant filter being fallen.

Background technology

In plastics recovery production line, reclaim in prilling, for guaranteeing polymer pelletizing smoothly, the polymer of molten condition must be through strict filtration before passing through pattern hole, and the trade mark difference according to material, requires the sieve screen apertures order number of filtration also not identical.Because production polymer process is to produce continuously, it is front and long-pending many gradually that the result of continuous impurity screening makes large granular materials and foul be blocked in net, and of a specified duration can make mesh obstruction, and flow reduces and increased pressure, when affecting output, just must change screen cloth.

Existing filter plant exists draping speed slow, generally need to shut down the defects such as draping, and also have on the market at present automatic screen changer, but this device exists complex structure, and cost is high, and does not possess the shortcomings such as automatic detection draping function.

Summary of the invention

The purpose of this utility model, provides a kind of simple in structure exactly in order to address the above problem, remain that a passage is unimpeded, thereby realizes the automatic net-changing device of draping automatically that do not stop continuously.

The purpose of this utility model is achieved in that

A kind of automatic net-changing device of the present utility model, comprises draping body, two Electrohydraulic push rods, upper and lower traveller, wide-meshed screen, fine screen mesh and pressure sensors, wherein,

Described draping body is provided with two axially extending bores, and described upper and lower traveller is located at respectively in corresponding axially extending bore, and is equipped with solarium on described upper and lower traveller;

The arranged on left and right sides face of described draping body and be positioned at center position, has discharging opening and charging aperture, and discharging opening and charging aperture are directly communicated with the solarium on upper and lower traveller to runner by two respectively;

The front end of described upper and lower traveller is fixedly connected with the piston rod of corresponding Electrohydraulic push rod respectively;

Wide-meshed screen and fine screen mesh are installed in the inner chamber of described solarium from left to right successively;

Described two axially extending bores are positioned on the inwall of point midway and are respectively equipped with a pressure sensor.

Above-mentioned a kind of automatic net-changing device, wherein, described draping body rear end face is positioned at charging aperture one side and offers respectively the back washing passage being communicated with corresponding axially extending bore, described discharging opening is communicated with corresponding axially extending bore respectively by two oblique runners, and the back washing passage being communicated with same axially extending bore and oblique runner, the port that is positioned at this axial passage place is relative.

Above-mentioned a kind of automatic net-changing device, wherein, described automatic net-changing device also comprises support, dirty hopper and deflection cone, described draping body is fixed on described support, described dirty hopper is located on the rear end face of described draping body, described deflection cone is located in described charging aperture, and the edge of its bottom and described straight tangent to the port edge of runner.

The utility model remains that a passage is unimpeded, thereby realize the draping automatically continuously of not stopping, and can pass through the automatic sense channel pressure of pressure sensor, back washing fast goes out dirty material, slightly, that fine screen mesh is changed speed is fast, have simple in structure, reliable operation, possesses automatic detection draping function, the advantage such as draping speed is fast.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the A-A cutaway view of Fig. 1;

Fig. 3 is the structural representation of draping body in the utility model;

Fig. 4 is the B-B cutaway view of Fig. 3;

Fig. 5 is back washing location state diagram;

Fig. 6 is draping location state diagram.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Refer to Fig. 1 and Fig. 2, there is shown the automatic net-changing device of the utility model, comprise draping body 3, two Electrohydraulic push rods 1, upper and lower traveller 2, wide-meshed screen 23, fine screen mesh 22, pressure sensor 9, support 5, dirty hopper 4 and deflection cones 6, wherein,

Draping body 3 is fixed on support 5, and dirty hopper 4 is located on the rear end face of draping body 3;

Draping body 3 is provided with two axially extending bores 31, and upper and lower traveller 2 is located at respectively in corresponding axially extending bore 31, and on upper and lower traveller 2, is equipped with the horizontal solarium 21 radially arranging;

The front end of upper and lower traveller 2 is fixedly connected with the piston rod of corresponding Electrohydraulic push rod 1 respectively;

Wide-meshed screen 23 and fine screen mesh 22 are installed in the inner chamber of solarium 21 from left to right successively;

Refer to Fig. 2 to Fig. 4, the arranged on left and right sides face of draping body 3 and be positioned at center position, has discharging opening 33 and charging aperture 32, and discharging opening 33 and charging aperture 32 are directly communicated with the solarium 21 on upper and lower traveller 2 to runner 34 by two respectively;

Deflection cone 6 is located in charging aperture 32, and as shown in Figure 3, the edge of deflection cone 6 bottoms is with straight tangent to the port edge of runner 34;

Two axially extending bores 31 are positioned on the inwall of point midway and are respectively equipped with a pressure sensor 9;

Draping body 3 rear end faces are positioned at charging aperture 32 1 sides and offer respectively the back washing passage 36 being communicated with corresponding axially extending bore 31, discharging opening 33 is communicated with corresponding axially extending bore 31 respectively by two oblique runners 35, and the back washing passage 36 and the oblique runner 35 that are communicated with same axially extending bore 31, the port that is positioned at these axial passage 31 places is relative.

The course of work of the present utility model is: when the utility model is during in normal operating conditions (as depicted in figs. 1 and 2), polymer masses is via charging aperture 32, along the outer wall of deflection cone 6 by directly enter the solarium 21 of upper traveller 2 to runner 34, after the wide-meshed screen 23 in solarium 21 and fine screen mesh 22 filters, through directly discharging to runner 34, discharging opening 33.Because production polymer process is to produce continuously, it is front and long-pending many gradually that the result of continuous impurity screening makes large granular materials and foul be blocked in screen cloth, the of a specified duration sieve screen apertures that can make is stopped up, flow reduces and increased pressure, when detecting pressure, pressure sensor 9 reaches when setting value, switch board is after receiving the signal of pressure sensor 9 transmissions, controlling Electrohydraulic push rod 1 moves rapidly, make the solarium 21 of traveller 2 connect back washing passages 36 and oblique runner 35(as shown in Figure 5), back washing goes out dirty material thus, dirty material is expelled in dirty hopper 4 by back washing passage 36, and then move to draping position (as shown in Figure 6), change wide-meshed screen 23, fine screen mesh 22.Electrohydraulic push rod 1 moves to duty position lower traveller 2 simultaneously.Remain that like this passage is unimpeded, thereby realize the draping automatically continuously of not stopping.

Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that not departing from spirit and scope of the present utility model, can also make various conversion or modification, therefore all technical schemes that are equal to also should belong to category of the present utility model, should be limited by each claim.

Claims

1. an automatic net-changing device, is characterized in that, comprises draping body, two Electrohydraulic push rods, upper and lower traveller, wide-meshed screen, fine screen mesh and pressure sensors, wherein,

2. a kind of automatic net-changing device as claimed in claim 1, it is characterized in that, described draping body rear end face is positioned at charging aperture one side and offers respectively the back washing passage being communicated with corresponding axially extending bore, described discharging opening is communicated with corresponding axially extending bore respectively by two oblique runners, and the back washing passage being communicated with same axially extending bore and oblique runner, the port that is positioned at this axial passage place is relative.

3. a kind of automatic net-changing device as claimed in claim 1, it is characterized in that, described automatic net-changing device also comprises support, dirty hopper and deflection cone, described draping body is fixed on described support, described dirty hopper is located on the rear end face of described draping body, described deflection cone is located in described charging aperture, and the edge of its bottom and described straight tangent to the port edge of runner.