CN201719884U

CN201719884U - Ultrahigh-pressure backwashing filter element

Info

Publication number: CN201719884U
Application number: CN2010202057800U
Authority: CN
Inventors: 应永华
Original assignee: Ningbo Long Wall Fluid Kinetic Sci Tech Co Ltd
Current assignee: Ningbo Long Wall Fluid Kinetic Sci Tech Co Ltd
Priority date: 2010-05-27
Filing date: 2010-05-27
Publication date: 2011-01-26
Anticipated expiration: 2020-05-27

Abstract

The utility model discloses an ultrahigh-pressure backwashing filter element which comprises an upper end cover, a lower end cover, an inner frame and a filter screen drum, wherein the upper end cover and the lower end cover are respectively welded at the upper end and the lower end of the inner frame; the filter screen drum is wrapped on the outer peripheral wall of the inner frame, and the upper end and the lower end thereof are respectively welded with the upper end cover and the lower end cover; and the ultrahigh-pressure backwashing filter element also comprises a threaded sleeve and a supporting spring, wherein the threaded sleeve is positioned in the inner frame and connected with the upper end cover by threads, the threaded sleeve is welded with the upper end cover, and the supporting spring is propped between the threaded sleeve and the lower end cover and tightly clings to the inner wall of the inner frame. In a condition of guaranteeing good filtering performance, the ultrahigh-pressure backwashing filter element can not only enable the inner frame to be stressed uniformly and not to deform easily, but also can prevent the upper end cover from falling off due to overhigh backwashing pressure.

Description

Filter core of ultrahigh-pressure back-flushing filter

Technical field:

The utility model relates to a kind of parts that can hold back impurity in the liquid, specifically is a kind of filter core of ultrahigh-pressure back-flushing filter.

Background technology:

Filter core is very important parts in the filter, at present, conventional filter core of ultrahigh-pressure back-flushing filter, as shown in Figure 1, one comprises upper end cover 1, bottom end cover 7, inner frame 8, screen tube 3, outer skeleton 2 and support ring 4, upper end cover 1 and bottom end cover 7 are welded on inner frame 8 upper/lower terminals respectively, weld with upper end cover 1 and bottom end cover 7 respectively outer skeleton 2 top and bottom, screen tube 3 outside between skeleton 2 and the inner frame 8, be connected with sealing ring 5 and back-up ring 6 on the bottom end cover 7, support ring 4 outer walls and the welding of inner frame 8 inwalls.Because the support ring limited amount, in other words, the contact-making surface between support ring and the inner frame inwall is fewer, therefore causes the inner frame discontinuity, and makes the inner frame distortion easily, and when backwashing pressure is excessive, also causes upper end cover to come off easily.For fear of the inner frame discontinuity, the prior art filter core of ultrahigh-pressure back-flushing filter has increased outer skeleton in the periphery of screen tube again, yet the filter core of this moment is owing to be subjected to the parcel of outer skeleton, thereby the filter area of filter core is reduced greatly, had a strong impact on the strainability of filter core.

The utility model content:

The technical problems to be solved in the utility model is, provide a kind of under the situation that guarantees good strainability, can either make inner frame stressed evenly and not yielding, can prevent the filter core of ultrahigh-pressure back-flushing filter that causes upper end cover to come off because of backwashing pressure is excessive again.

Technical solution of the present utility model is, provide a kind of filter core of ultrahigh-pressure back-flushing filter: comprise upper end cover with following structure, bottom end cover, inner frame and screen tube, upper end cover and bottom end cover are welded on the inner frame respectively, following two ends, screen tube be wrapped on the inner frame outer circumferential walls and on, weld with upper end cover and bottom end cover respectively at following two ends, wherein: also comprise swivel nut and support spring, swivel nut is positioned at inner frame and is threaded with upper end cover, swivel nut and upper end cover welding, support spring withstands between swivel nut and the bottom end cover, and is close to the inner frame inwall.

A kind of filter core of ultrahigh-pressure back-flushing filter described in the utility model, wherein, the filter screen on the screen tube can adopt six layers of structure sintering net.

After adopting above structure, compared with prior art, the utility model filter core of ultrahigh-pressure back-flushing filter has the following advantages: increasing the purpose that withstands on the support spring between swivel nut and the bottom end cover in inner frame is the contact-making surface that can increase between spring and the inner frame inwall, thereby make inner frame can be stressed evenly, not yielding, and, not only there is the welding relation between swivel nut in the utility model and the upper end cover, but also combine the combination that is threaded, thereby overcome the defective that upper end cover comes off because of backwashing pressure is excessive; Meanwhile, because utility model filter core of ultrahigh-pressure back-flushing filter skeleton outside the outside of screen tube does not connect, therefore having guaranteed the utlity model has enough filter areas reaches good strainability.

Description of drawings:

Fig. 1 is the structural representation of prior art filter core of ultrahigh-pressure back-flushing filter,

Fig. 2 is the structural representation of the utility model filter core of ultrahigh-pressure back-flushing filter.

The specific embodiment:

Below in conjunction with the drawings and specific embodiments the utility model filter core of ultrahigh-pressure back-flushing filter is described in further detail:

As shown in Figure 2, in this specific embodiment, the utility model filter core of ultrahigh-pressure back-flushing filter comprises upper end cover 1, bottom end cover 7, inner frame 8, screen tube 3, swivel nut 9 and support spring 10, upper end cover 1 and bottom end cover 7 are welded on respectively on the inner frame 8, following two ends, screen tube 3 be wrapped on inner frame 8 outer circumferential walls and on, weld with upper end cover 1 and bottom end cover 7 respectively at following two ends, be connected with sealing ring 5 and back-up ring 6 on the bottom end cover 7, swivel nut 9 is positioned at inner frame 8 and is threaded with upper end cover 1, swivel nut 9 and upper end cover 1 welding, support spring 10 withstands between swivel nut 9 and the bottom end cover 9, and be close to inner frame 8 inwalls, what the filter screen on the screen tube 3 adopted is six layers of structure sintering net, this six layers of structure sintering net are a kind of prior aries, so do not give unnecessary details at this, it is the intensity that strengthens filter core of ultrahigh-pressure back-flushing filter for further that the utility model adopts the purpose of six layers of structure sintering net, thereby guarantees that further the utility model does not deform.

Claims

1. filter core of ultrahigh-pressure back-flushing filter, comprise upper end cover (1), bottom end cover (7), inner frame (8) and screen tube (3), upper end cover (1) and bottom end cover (7) are welded on respectively on the inner frame (8), following two ends, screen tube (3) be wrapped on inner frame (8) outer circumferential walls and on, weld with upper end cover (1) and bottom end cover (7) respectively at following two ends, it is characterized in that: also comprise swivel nut (9) and support spring (10), swivel nut (9) is positioned at inner frame (8) and is threaded with upper end cover (1), swivel nut (9) and upper end cover (1) welding, support spring (10) withstands between swivel nut (9) and the bottom end cover (7), and is close to inner frame (8) inwall.

2. filter core of ultrahigh-pressure back-flushing filter according to claim 1 is characterized in that: the filter screen on the described screen tube (3) adopts six layers of structure sintering net.