CN201537421U

CN201537421U - Self-cleaning net filter

Info

Publication number: CN201537421U
Application number: CN200920154967XU
Authority: CN
Inventors: 李双全; 杨树新; 徐昭; 兰明; 邸红
Original assignee: Xinjiang Tianye Group Co Ltd
Current assignee: Xinjiang Tianye Group Co Ltd
Priority date: 2009-05-06
Filing date: 2009-05-06
Publication date: 2010-08-04
Anticipated expiration: 2019-05-06

Abstract

The utility model relates to a self-cleaning net filter comprising a filter shell, a net filtering core and a control device, wherein a water inlet and a water outlet are respectively arranged at both ends of the filter shell; a blow-off pipe is arranged at the side of the filter shell nearby the water outlet; one end of the blow-off pipe extending the filter shell is connected with a reducing joint through a bent pipe; the net filtering core is arranged in the filter shell; the control device is composed of a controller, a baffle plate, a central valve sheet and an arc valve sheet; the net filtering core is separated into two sections by the baffle plate; one side of each section is sheathed in a baffle plate groove, the other side of one section is sheathed in the reducing joint through a glue pad, and the other side of the other section is connected with a flange disk through a glue pad. Compared with the prior art, the arc valve sheet and the baffle plate are arranged on the control device. When the self-cleaning net filter works normally, the filtration of the net filtering core nearby the water inter is stopped to prevent impurities from stopping at the net filtering core, and thus the efficiency of back washing can be improved.

Description

The self-cleaning well strainer

Technical field

The utility model relates to a kind of self-cleaning well strainer that farm irrigation system is filtered.

Background technology

The current automatic backwash well strainer that is used for farm irrigation system generally all adopts a plurality of net formula filter elements to be used in combination, and must just can finish by means of the auxiliary of other unit the backwash of a certain unit.Adopt the well strainer of filter element self-cleaning exactly, also can make filter be in the filtration state for a long time near the position of water inlet, cause some fibre type impurity for a long time attached to herein, be difficult for being flushed away, if things go on like this, not only causing herein, the damage of filter screen increases cost, and the backwash effect of reduction filter, patent ZL 200420072366.1 disclosed a kind of differential full-automatic drain filters for example, it is by a columniform housing and set up thereon water inlet, delivery port and sewage draining exit to constitute simultaneously, is provided with screen pack in the described housing; Described water inlet and delivery port are respectively equipped with intake pressure and measure mouth and discharge pressure mensuration mouth, are linked by pressure controller between the two; Described sewage draining exit place and housing front end are respectively arranged with blowdown actuator and backwash actuator, and this blowdown actuator is connected with differential pressure controller respectively with the backwash actuator.Its weak point is that the filter screen between water inlet and the pressure-control valve is in the state of filter medium always, that is to say flinging of filter wash with two kinds of situations of backwash under, filter screen all is in the state of filtration herein, if things go on like this impurity of some fibre type is relatively easy to adhere on the filter screen, filter screen is herein stopped up, reduced the water amount of this filter screen, thereby reduced clear water amount, reduced the backwash efficient of filter the backwash of rearmounted filter screen.

Summary of the invention

The purpose of this utility model is to solve the obstruction of preposition filter screen in the existing self-cleaning well strainer, causes and reduces filter screen service life, increases use cost, and reduces the problem to rearmounted filter screen backwash efficient.And then provide a kind of low cost, the self-cleaning well strainer of high backwash efficiency.

Its basic system of the utility model mainly comprises housing, housing is provided with entery and delivery port and control device, be provided with homoaxial net formula filter core in the housing, net formula filter core links to each other with blow-off pipe by reducing joint, be provided with the center valve block in the net formula filter core, control device is made up of central shaft and controller, the center valve block links to each other with central shaft, its net formula filter core outer wall is socketed with dividing plate, dividing plate links to each other with housing, dividing plate both sides and inner walls gap are provided with the arc valve block that matches with it, and the arc valve block links to each other with central shaft.The central shaft of control device passes dividing plate, and center valve block and arc valve block are located on the central shaft, and the inner hole surface on center valve block and the dividing plate matches, and centre valve is unilateral and the unilateral space bit of arc valve is set to plumbness.

The utility model is provided with on the both sides of the center of control device valve block and unilateral two arc valve blocks and the dividing plate that becomes plumbness of centre valve, fling when washing state at filter, arc valve block and dividing plate match, stop water to flow out through delivery port by the filtration of preposition net formula filter core, main filtration this moment by rearmounted net formula filter core, when impurity acquires a certain degree, pressure constantly is increased to certain numerical value, controller is activated, closing center's valve block, opened the arc valve block on valve block both sides, center simultaneously, make the arc valve block separate, meanwhile open blowoff valve with dividing plate, thus the clear water of the preposition net formula filter element filtering of process, after rearmounted net formula filter core carried out backwash, addle was discharged through blow-off pipe.As seen the utility model has overcome preposition net formula filter core and has been in the filtration state for a long time, easily stop up and cause the damage of net formula filter core and reduce backwash efficient rearmounted net formula filter core, increased net formula filter core service life, reduced cost, improved the efficient of backwash.

Description of drawings

Accompanying drawing 1,2 is the structural representation of the utility model embodiment.

Among the figure, 1 is water inlet, and 2 is filter housings, and 3 is controller, and 4 is net formula filter core, and 5 are reducing joint, and 6 is delivery port, and 7 is the center valve block, and 8 is the arc valve block, and 9 is that central shaft, 10 is blow-off pipe, and 11 is dividing plate.

Specific embodiment

With reference to accompanying drawing 1,2, mainly comprise filter housings 2 in the present embodiment, water inlet 1 and delivery port 6 are located at the two ends of filter housings respectively, place at the close delivery port of filter head housings body side surface is provided with blow-off pipe 10, the end that blow-off pipe stretches in the housing is connected with reducing joint 5 by bend pipe, be provided with net formula filter core 4 in the filter housings, control device is made up of controller 3 and central shaft 9, net formula filter core controlled device is divided into two sections, one side of every section net formula filter core all is socketed in dividing plate 11 grooves of control device, one section opposite side is socketed in the reducing joint by rubber cushion, the opposite side of another section is by rubber cushion adpting flange lid, its central shaft passes dividing plate, center valve block 7 is located on the central shaft with arc valve block 8, inner hole surface on center valve block and the dividing plate matches, and centre valve is unilateral and the unilateral space bit of arc valve is set to plumbness.

Operation principle: sewage enters in the net formula filter core of filter through water inlet, this moment, the center valve block was in the state of opening, and the arc valve block on valve block both sides, center is in closed condition, make net formula filter core lose the ability of filtering sewage near that section net formula filter core of water inlet, can stop of the stop of the impurity of some fibre type like this at this section net formula filter core place, the filtration state that flings when washing is transferred on other one section net formula filter core fully, when being filled into certain degree, impurity constantly stops up back segment net formula filter core, reduce the discharge capacity of net formula filter core, pressure in the filter constantly rises, when pressure rises to a certain particular value, the controller of control set for adjusting, closing center's valve block, open the arc valve block on valve block both sides and the valve of blow-off pipe simultaneously, the clear water that utilizes leading portion net formula filter element filtering to cross carries out backwash to back segment net formula filter core, behind the flushing certain hour, controller starts once more, open the center valve block, close the arc valve block on valve block both sides simultaneously, and close the valve on the blow-off pipe, continue filtration sewage.

Claims

1. self-cleaning well strainer, comprise housing, housing is provided with entery and delivery port and control device, be provided with homoaxial net formula filter core in the housing, net formula filter core links to each other with blow-off pipe, be provided with the center valve block in the net formula filter core, control device is made up of central shaft and controller, the center valve block links to each other with central shaft, it is characterized in that net formula filter core outer wall is socketed with dividing plate, dividing plate links to each other with housing, and dividing plate both sides and inner walls gap are provided with the arc valve block that matches with it, and the arc valve block links to each other with central shaft.

2. self-cleaning well strainer as claimed in claim 1, the central shaft that it is characterized in that control device passes dividing plate, center valve block and arc valve block are located on the central shaft, and the inner hole surface on center valve block and the dividing plate matches, and centre valve is unilateral and the unilateral space bit of arc valve is set to plumbness.

3. self-cleaning well strainer as claimed in claim 1 or 2 is characterized in that dividing plate is divided into two sections of front and back with net formula filter core, and the both sides of dividing plate are provided with annular groove, in the inner groove that embeds on the dividing plate of net formula filter core.

4. self-cleaning well strainer as claimed in claim 3 is characterized in that the rear end of net formula filter core links to each other with blow-off pipe by reducing joint.