CN2165911Y - Rotary filtering net with pressure water reverse flushing mechanism - Google Patents

Abstract

The utility model relates to a rotary filtering net with a pressure water reverse flushing mechanism for filtering sundries in water. The utility model is characterized in that the center of a net core is provided with a hollow shaft, and the hollow shaft and a pressure water pipe outside the filtering net are mutually connected. A transverse pipe is connected with the hollow shaft, and one end of the transverse pipe is provided with a water spraying device. The water spraying device is composed of a short pipe, a nozzle on the short pipe or a slit, a pinhole, etc. The hollow shaft is stationary and the net core is rotated around the hollow shaft or the net is stationary and the hollow shaft rotates. When reverse flushing is carried out, pressure water from an outer part flows to the transverse pipe through the hollow shaft, and then the pressure water is ejected outside toward a net surface through the water spraying device. Reverse washing is carried out to the net surface, and accordingly, the utility model reaches the purpose of cleaning the sundries on the net surface.

Description

Rotary filtering net with pressure water reverse flushing mechanism

The utility model is that the rotation of the band press water backwash mechanism of filtered water filters net, a large amount of cooling waters of each industrial department such as chemical industry, metallurgy, papermaking, and these cooling waters are mostly from great river, lake, sea.Many local agriculturals, civilian these water of also using, the place of every these water of usefulness, all handy filtration net, because contain a large amount of various foreign material in these water, if do not filter, the very fast inlet with equipment of these foreign material stops up, and water can't normally be circulated, have a strong impact on the normal operation of equipment, even cause the accident.So each department such as industrial, agriculture, civilian uses the filtration net of all size, various types in a large number.

The common feature of the various filter screens that use is at present, is drilled with many apertures on metallic plate, leans on these apertures water filtration.These disadvantage that filter net are, in case these apertures have been become problem by the cleaning that foreign material stop up itself.The fixed filtration net of installing as present pump entrance, in case mesh blocked after, have to stop pump, open and filter the net square, take out web-roll core, carry out hand sweeping time-consuming, take a lot of work, take can, influence the normal operation of equipment.

A large amount of waters in the modern thermal power plant for purifying these water, are often established the 2-3 road and are filtered net, turbine condenser inlet cooling water secondary net particularly, and its work is cherished well, is directly connected to the safety and economic operation of whole generating factory.Water purification and the cleaning performance of people in order to improve this secondary net carried out great deal of experimental work, invented the filtration net of some patterns, tangentially filters net etc. as negative pressure backpulsing, Hough butterfly valve type.Even but more welcome negative pressure backpulsing filters net, when containing more foreign material in the water, also be difficult to competent at a jobly, because that wire side can not clean up the contamination district is bigger, have to take away secondary net etc.Facts have proved in a large number, resemble eddy flow and the backwash of depending merely on water the present various filtration nets and be difficult to keep filtering the net surface cleaning, be difficult to adapt to the more occasion of foreign material in the water.

The purpose of this utility model is exactly to solve existing these shortcomings that filter net, guarantee to filter the purifying water effect of net, keep the wire side cleaning, accomplish and do not stop equipment, not hand sweeping, simple to operate, easy to maintenance in order to realize its purpose, the utility model changes in traditional filtration net, depends merely on the negative pressure recoil of cooling water itself or method that eddy flow is removed foreign material on the wire side and carries out backwash by means of external press water and have one to overlap pressure water backwashing mechanism.Its concrete structure is such: there is an axle in the central authorities at the metal net core of garden tubular, and axle is hollow, and its penstocks outer with filtering net is connected, and web-roll core is around air-cored axis's rotation and air-cored axis does not change, the perhaps motionless air-cored axis of web-roll core rotation.Air-cored axis can be made by the metal tube of sufficient intensity and rigidity, picks out transverse tube in the air-cored axis, and an end of transverse tube has water injector, and it is made up of short tube and nozzle or slit, aperture.Net external press water and arrive transverse tube, from water injector, spray then, wire side is washed through air-cored axis, the outlet of water injector is over against wire side and blowdown chamber, so the foreign material that wire side got off clearly when rotating concentrate on the blowdown chamber, at this time one begin to rehearse dirtyly, just foreign material are discharged to outside the net.Also can make web-roll core according to the pattern of considering net and not rotate, and air-cored axis rotates.Rotate web-roll core or air-cored axis can with electronic, surge also available manually, see the web-roll core size and decide.

Characteristics of the present utility model are: it is effective to remove contamination, the disadvantage of existing filtration net is the weak effect of removing contamination, it is to carry out backwash by the eddy flow of the current of cooling water own or the about pressure reduction of wire side, because the low pressure reduction of water speed is little, be difficult to clean up, the wire side contamination is many as a result, causes the distortion of wire side bite, has to split out secondary net etc. sometimes.In the utility model, because a cover pressure water backwashing mechanism is arranged, utilize elevated pressures water to carry out backwash, improved the effect of removing contamination greatly, accomplish the wire side cleaning, no contamination district rotates flexibly, not bite distortion.Accompanying drawing is an embodiment schematic diagram of the present utility model.It comprises (1) shell (2) penstocks (3) blowdown chambers (4) air-cored axis (5) web-roll cores (6) inlet tubes (7) transverse tubes (8) outlets (9) sewage doors (10) water injectors (11) tumbler.The direction of current is from outside to inside, and the web-roll core rotation direction is clockwise.

Claims (3)

1, a kind of rotation with press water backwash mechanism filters net, it comprises inlet tube (7), outlet (9), shell (1) rotating mechanism (11), blowdown chamber (3), sewage door (9), web-roll core (5) etc., it is characterized in that, it is the hollow shaft (5) that is connected by with external pressure water pipe (2), the water injector compositions such as (10) on transverse tube that is connected with hollow shaft (7) and transverse tube one end.

2, the rotation of band press water backwash according to claim 1 mechanism filters net, it is characterized in that, web-roll core be around hollow shaft rotate and hollow shaft be do not rotate or hollow shaft rotate and web-roll core does not rotate.

3, the rotation of band press water backwash according to claim 1 mechanism filters net, it is characterized in that, water injector is made up of the nozzle on short tube and the short tube or slit, aperture, and its Way out is to face toward wire side.