CN2650842Y

CN2650842Y - Reverse-flushing self-cleaning filter

Info

Publication number: CN2650842Y
Application number: CN 200320110448
Authority: CN
Inventors: 薛新宇; 傅锡敏; 戴奋奋; 周立新; 龚艳
Original assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Current assignee: Nanjing Research Institute for Agricultural Mechanization Ministry of Agriculture
Priority date: 2003-10-28
Filing date: 2003-10-28
Publication date: 2004-10-27
Anticipated expiration: 2013-10-28

Abstract

The utility model relates to a filter that is used on the liquid inlet of a sprayer, and pertains to the technical field of fluid purification facilities. A filtering body is fixed on the top of the filter base, a filter element is fixed in the middle of the filter base, and a blow-down valve is mounted on the drain port on the bottom of the filter base. The top port of the filter element is open to the liquid inlet, and the bottom port of the filter element is open to the drain port on the bottom of the filter base; the cavity between the filter base and the filter element is open to the liquid outlet. In addition, a shortcut channel mounted with a back-flush valve is arranged between the liquid inlet and liquid outlet on the filter body. When the back-flush valve is opened, the shortcut channel will be opened; when the top port on the filter element is closed, the liquid that flows into the liquid inlet will flow through the shortcut channel into the cavity between the filter base and the filter element, and then pass through the filter element in reverse direction, to wash off small foreign matters on the filter surface and drain out through the drain port. The utility model implements automatic cleaning of filter element with a simple and smart structure, and is easy to operate and delivers good cleaning effect.

Description

Backwashing self-cleaning formula filter

Technical field

The utility model relates to a kind of filter, and especially a kind of filter that is applied in the injection line belongs to fluid purification facility technology field.

Background technology

Filter is one of critical piece in the liquid pipeline system, is installed in the entrance point of injecting-unit usually.Its effect is the particulate contamination in the filtering liquid pipeline system, avoids pipeline blockage, and guarantees the normal use of injecting-unit.

Understand according to the applicant, existing the middle part fixedly mounted filter core through improving the filter with self-cleaning function is shaped on inlet and liquid outlet usually in the filtering base upper end fixed installation of tubular filtering bodies, and the sewage draining exit of bottom is installed blowoff valve.The upper port of crossing filter core is communicated with inlet, and lower port is communicated with the sewage draining exit of filtering base bottom, and filtering base is communicated with liquid outlet with the chamber of crossing between the filter core.When liquid behind the inlet inflow filter, will be through filter element filtering, see through and flow out from liquid outlet after liquid enters chamber.The impurity of being detained in crossing filter core can be opened blowoff valve cleaning discharge.

The filtering surface that above-mentioned existing filter is in use crossed filter core is stopped up by tiny impurity easily, thereby influences the filter efficiency of filter.In order to guarantee the operate as normal of filter, have to often take out filter core and clean or change.

Summary of the invention

The purpose of this utility model is: the shortcoming at above prior art exists proposes a kind of backwashing self-cleaning formula filter that filter core can be finished its cleaning automatically that can need not to take out.

In order to reach above purpose, the filtering base upper end fixed installation of backwashing self-cleaning formula filter of the present utility model is shaped on the filtering bodies of inlet and liquid outlet, and the middle part fixedly mounted filter core, and the sewage draining exit of bottom is installed blowoff valve.The upper port of crossing filter core is communicated with inlet, and lower port is communicated with the sewage draining exit of filtering base bottom, and filtering base is communicated with liquid outlet with the chamber of crossing between the filter core.In addition, between the inlet of filtering bodies and liquid outlet, be shaped on short-channel, and be equipped with at this short-channel and the recoil valve of crossing filter core upper port switching controls.

When recoil valve cuts out, when short-channel is blocked, crosses the upper port of filter core and open filter normal filtration of the present utility model; When recoil valve is opened, short-channel opens, cross the filter core upper port when being closed, external valve closing, the blowoff valve of liquid outlet opened, the liquid that flows into inlet will pass through short-channel, enter the chamber between filtering base and the mistake filter core, then oppositely saw through filter core, the fine impurities that sticks to filtering surface was washed out, discharged by sewage draining exit.

Obviously, the utility model has realized crossing the automatic cleaning of filter core with structure simply cleverly, and easy and simple to handle, and cleaning performance is good.

Description of drawings

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

Fig. 1---Fig. 3 is respectively duty, cleaning state and the anti-view of cleaning of an embodiment of the utility model.

The specific embodiment

Embodiment one

The backwashing self-cleaning formula filter of present embodiment as shown in Figure 1, in filtering base 1 upper end of tubular by being threaded, fixed installation is shaped on the filtering bodies 2 of horizontal inlet 2-1 and liquid outlet 2-1, middle part fixed installation tubular filter core 3, and the sewage draining exit 1-1 of bottom installs blowoff valve 4.The upper port of crossing filter core 3 is communicated with inlet 2-1, and lower port is communicated with the sewage draining exit 1-1 of filtering base 1 bottom.Filtering base 1 is communicated with liquid outlet 2-2 with the tubular chambers 1-2 that crosses between the filter core 2.Between the inlet 2-1 of filtering bodies 2 and liquid outlet 2-2, be shaped on short-channel 2-3, recoil valve 5 is equipped with in the upper end of filtering bodies 2, and the middle part of this recoil valve 5 and bottom are fixed with control short-channel 2-3 respectively and cross the middle valve gap 5-1 and the bottom flange 5-2 of filter core 3 upper port break-makes.

When as shown in Figure 1, recoil valve (5) is in upper, short-channel (2-3) by in valve gap (5-1) blocking-up, blowoff valve (4) crosses the upper port of filter core (3) and opens when cutting out, the filter of present embodiment is in running order, finishes normal filtration work.

When as shown in Figure 2, recoil valve (5) still is in upper, and blowoff valve (4) is when opening, and the filter of present embodiment is in the cleaning state, and the liquid that inlet (2-1) flows into will be crossed in the filter core (3) filter impurity down by blowoff valve (4) discharge.

When as shown in Figure 3, recoil valve (5) is in the next, short-channel (2-3) opens, cross filter core (3) upper port by bottom flange (5-2) when closing, the external valve closing of liquid outlet (2-2), the filter of present embodiment is in the backwash state, blowoff valve (4) is opened, the liquid that flows into inlet (2-1) will be by short-channel (2-3), enter the chamber between filtering base (1) and the mistake filter core (3), then oppositely saw through filter core (3), the fine impurities that sticks to filtering surface is washed out, discharged by blowoff valve (4).

This shows that the backwashing self-cleaning formula filter of present embodiment can be realized the automatic cleaning of filter core, thereby keep filter to be in good working order all the time, its good manufacturability is used easy and simple to handle.

In addition to the implementation, the utility model can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.

Claims

1. a backwashing self-cleaning formula filter comprises filtering base, crosses filter core and filtering bodies; The upper end fixed installation of described filtering base is shaped on the filtering bodies of inlet and liquid outlet, and the middle part fixedly mounted filter core, and the sewage draining exit of bottom is installed blowoff valve; The described upper port of crossing filter core is communicated with described inlet, and lower port is communicated with described sewage draining exit; Described filtering base is communicated with liquid outlet with the chamber of crossing between the filter core, it is characterized in that: be shaped on short-channel between the inlet of described filtering bodies and the liquid outlet, in the described short-channel recoil valve be housed.

2. according to the described shape backwashing self-cleaning of claim 1 formula filter, it is characterized in that: described filtering base is tubular, and the upper end is shaped on the filtering bodies of horizontal inlet and liquid outlet by the fixed installation that is threaded.

3. according to the described shape backwashing self-cleaning of claim 2 formula filter, it is characterized in that: the middle part of described recoil valve and bottom are fixed with the control short-channel respectively and cross the middle valve gap and the bottom flange of filter core upper port break-make.