CN2889445Y

CN2889445Y - Back flush filter

Info

Publication number: CN2889445Y
Application number: CN 200620012426
Authority: CN
Inventors: 高希民
Original assignee: Chinacoal Beijing Coal Mining Machinery Co Ltd
Current assignee: Chinacoal Beijing Coal Mining Machinery Co Ltd
Priority date: 2006-04-17
Filing date: 2006-04-17
Publication date: 2007-04-18
Anticipated expiration: 2016-04-17

Abstract

The utility model provides a backwashing filter. The backwashing filter comprises a filter main body, on which is provided with a liquid inlet and a liquid outlet, the external side of the liquid inlet is equipped with a joint connected with the pipeline of the hydraulic pressure system, wherein the filter main body is equipped with a first filter chamber and a second filter chamber, a first filter element is fixed inside the first filter chamber, and a second filter element is fixed inside the second filter chamber; a first backwashing switch is installed between the first filter chamber and the liquid inlet, a second backwashing switch is installed between the second filter chamber and second filter chamber, the first backwashing switch is used to open and close a first communication opening, which makes the liquid inlet communicate with the first filter chamber, and the second backwashing switch is used to open and close a second communication opening, which makes the liquid inlet communicate with second filter chamber. The backwashing filter element in the utility model can be cleaned without disassembly and conducted without transporting to the repair workshop, thus saving time and labor, as well as greatly enhancing work efficiency.

Description

Backwash filter

Technical field

The utility model relates to filter, particularly colliery comprehensive mining support apparatus---and a kind of hydraulic system filter that adopts in the hydraulic support, this filter can carry out back flush.

Background technology

Filter is very important parts in the hydraulic support, is to be used for keeping hydraulic system to clean, prevent that contamination particle from entering the element of liquid-supplying system, and it can guarantee the normal operation of Hydraulic Elements and system.The filter that adopts adopts the structure of establishing screen pack along the cross-wise direction of pipeline mostly at present, and there is following deficiency in such filter: 1) because filter area is little, it is little to cross flow quantity, can not satisfy the demand of jumbo hydraulic support; 2) if screen pack is too fine and closely woven, then easily stifled match can't be satisfied the requirement of flow, if too sparse then filtering accuracy is low, contamination particle enters hydraulic system easily, damages Hydraulic Elements, and the system that influences normally moves; 3) pressure reduction of screen pack both sides is big, and screen pack damages easily, in case screen pack damages, gently then needs the repair and replacement influence to produce, and is heavy then damage Hydraulic Elements, causes the damage of hydraulic test.4) after filter core is contaminated, cleaning needs can carry out after the dismounting, and then assembles, because the working environment of down-hole can't satisfy the needs of cleaning, so need integral replacing, wastes time and energy.In view of above deficiency, designer of the present utility model has designed a kind of novel filter.

Summary of the invention

The purpose of this utility model is to provide a kind of novel backwash filter, and this backwash filter not only can overcome above-mentioned deficiency, accomplishes that flow is big, filtering accuracy is high, and long service life, changes easily.

Backwash filter of the present utility model comprises a filter body 1, on this filter body 1, be provided with inlet A and liquid outlet C, be provided with the interface 12 that the pipeline with hydraulic system joins in the outside of inlet A, it is characterized in that, on described filter body, also be provided with first filter chamber 2 and second filter chamber 2 ', in first filter chamber, be fixed with first filter core 3, in second filter chamber, be fixed with second filter core 3 '.

Another feature of backwash filter of the present utility model is, between described first filter chamber 2 and described inlet A, be provided with the first backwash switch 4, between second filter chamber 2 ' and second filter chamber, establish the second backwash switch 4 ', the first backwash switch is used for opening and closing the first mouth B1 of UNICOM that the inlet A and first filter chamber 2 are linked, and the second backwash switch is used for opening and closing the second mouth B2 of UNICOM that makes the inlet A and the second filter chamber UNICOM.

Because backwash filter of the present utility model is provided with two filter chambers and is provided with the switch that opens and closes inlet and filter chamber respectively between two filter chambers and inlet, so, can be when a side filter core be contaminated, close the switch between this filter chamber and the inlet, make liquid from another filter chamber reverse flow to this filter chamber, flushing is arranged in the filter core of this filter chamber, thereby avoids dismantling this filter element.Equally, when the opposing party's filter core is contaminated, close this opposing party's switch, make liquid wash this opposing party's filter core from opposite direction.Therefore, it is the filter core that is polluted capable of washing that backwash filter of the present utility model need not to dismantle, not only cleaning filter core need not to transport to the outer repair workshop of well and carries out, can operate at the scene, down-hole, save time, laborsaving, greatly improve operating efficiency, and, owing to can clean filter core at any time, not only improved the service life of filter core greatly, and the life-span that can improve whole hydraulic system.

Another feature of backwash filter of the present utility model is, described filter core 3,3 ' comprising: core print 24,24 ' is provided with through hole 25,25 ' in this core print 24, a side of 24 ', this through hole 25,25 ' is connected with liquid outlet C, be provided with screw thread in this core print 24,24 ' end, this screw thread is used for filter core 3,3 ' is fixed on filter chamber; Screen pack 21,21 ', this screen pack is a tubular, be provided with along filter chamber 2,2 ' chamber wall direction, the one end is fixed on the end that core print 24,24 ' is arranged in filter chamber, the other end is fixed on the core tail 22,22 ' of filter core, filtrate can enter this screen pack 21,21 ' through the first mouth B1 of UNICOM or the second mouth B2 of UNICOM from inlet, flow in the above-mentioned filter chamber through this screen pack then, and described filter chamber is connected with the circulation line of hydraulic system by liquid outlet C.

Because filter element of the present utility model is provided with the screen pack that is provided with along filter chamber chamber wall direction, this has not only increased the area of screen pack greatly, and, because the end at screen pack is provided with the shutoff that is approximately perpendicular to circulation line, so can effectively reduce the pressure reduction of screen pack both sides, filtrate is fully filtered in filter chamber, improved the service life of Hydraulic Elements greatly.And, owing to the area of screen pack increases greatly, so effectively reduce because the mechanical breakdown that the obstruction of screen pack causes has improved production efficiency greatly.

Figure of description

Fig. 1 is the structural representation of backwash filter of the present utility model.

Fig. 2 is the handle schematic diagram of the backwash switch of backwash filter of the present utility model.

The specific embodiment

Followingly be elaborated with reference to the specific embodiment of accompanying drawing to backwash filter of the present utility model.

Fig. 1 is the structural representation of backwash filter of the present utility model.Fig. 2 is the handle schematic diagram of the backwash switch of backwash filter of the present utility model.1 is filter body, on this filter body 1, be provided with inlet A and liquid outlet C, be provided with the interface 12 that the pipeline with hydraulic system joins in the outside of inlet A, wherein, on described filter body 1, also be provided with first filter chamber 2 and second filter chamber 2 ', in first filter chamber, be fixed with first filter core 3, in second filter chamber, be fixed with second filter core 3 '.

Between described first filter chamber 2 and described inlet A, be provided with the first backwash switch 4, between second filter chamber 2 ' and second filter chamber, establish the second backwash switch 4 ', the first backwash switch is used for opening and closing the first mouth B1 of UNICOM that the inlet A and first filter chamber 2 are linked, and the second backwash switch is used for opening and closing the second mouth B2 of UNICOM that makes the inlet A and the second filter chamber UNICOM.During operate as normal, highly pressurised liquid divides two-way to flow out from liquid outlet C behind first filter core and second filter element filtering from inlet A, flows to the circulation line of hydraulic system.When needs clean first filter core 21, rotate handle 90 degree of the first backwash switch 4, the inlet A and the first mouth B1 of UNICOM are closed, highly pressurised liquid through inlet A to the second mouth B2 of UNICOM, again through second filter chamber 2 ' to liquid outlet C, from inside to outside flow to the first mouth B1 of UNICOM again by first filter core 21, make first filter core 21 obtain cleaning, in like manner, when needs clean second filter core 21 ', rotate handle 90 degree of the second backwash switch 4 ', the inlet A and the second mouth B2 of UNICOM are closed, and highly pressurised liquid to the first mouth B1 of UNICOM, arrives liquid outlet C through first filter chamber 2 through inlet A again, from inside to outside flow to the second mouth B2 of UNICOM again, make second filter core 21 ' obtain cleaning by second filter core 21 '.In addition, must guarantee that the handle of the first backwash switch 4 and second backwash 4 ' can not rotate simultaneously.

The filter core 3,3 ' of stating of backwash filter of the present utility model comprises: core print 24,24 ' is provided with through hole 25,25 ' in this core print 24, a side of 24 ', this through hole 25,25 ' is connected with liquid outlet C, be provided with screw thread in this core print 24,24 ' end, this screw thread is used for filter core 3,3 ' is fixed on filter chamber; Screen pack 21,21 ', this screen pack is a tubular, be provided with along filter chamber 2,2 ' chamber wall direction, the one end is fixed on the end that core print 24,24 ' is arranged in filter chamber, the other end is fixed on the core tail 22,22 ' of filter core, filtrate can enter this screen pack 21,21 ' through the first mouth B1 of UNICOM or the second mouth B2 of UNICOM from inlet, flow in the above-mentioned filter chamber through this screen pack then, and described filter chamber is connected with the circulation line of hydraulic system by liquid outlet C.

Claims

1, a kind of backwash filter, comprise a filter body (1), on this filter body (1), be provided with inlet (A) and liquid outlet (C), be provided with the interface (12) that the pipeline with hydraulic system joins in the outside of inlet (A), it is characterized in that, on described filter body, also be provided with first filter chamber (2) and second filter chamber (2 '), in first filter chamber, be fixed with first filter core (3), in second filter chamber, be fixed with second filter core (3 ').

2, backwash filter as claimed in claim 1, it is characterized in that, between described first filter chamber (2) and described inlet (A), be provided with the first backwash switch (4), between second filter chamber (2 ') and second filter chamber, establish the second backwash switch (4 '), the first backwash switch is used for opening and closing first UNICOM's mouth (B1) that inlet (A) and first filter chamber (2) are linked, and the second backwash switch is used for opening and closing the second UNICOM's mouth (B2) that makes the inlet (A) and the second filter chamber UNICOM.

3, as claim 1 or the described backwash filter of claim 2, it is characterized in that, described filter core (3,3 ') comprising: core print (24,24 '), side at this core print (24,24 ') is provided with a through hole (25,25 '), this through hole (25,25 ') is connected with liquid outlet (C), end at this core print (24,24 ') is provided with screw thread, and this screw thread is used for filter core (3,3 ') is fixed on filter chamber; Screen pack (21,21 '), this screen pack is a tubular, be provided with along filter chamber (2,2 ') chamber wall direction, the one end is fixed on the end that core print (24,24 ') is arranged in filter chamber, the other end is fixed on the core tail (22,22 ') of filter core, filtrate can enter this screen pack (21,21 ') through first UNICOM's mouth (B1) or second UNICOM's mouth (B2) from inlet, flow in the above-mentioned filter chamber through this screen pack then, described filter chamber is connected with the circulation line of hydraulic system by liquid outlet C.