CN208770957U - Pressure limiting classified filtering device can be backwashed - Google Patents

Abstract

One kind can backwash pressure limiting classified filtering device, be related to oil field well water injection filter field.Shell including tubular, the side of shell is provided with water inlet pipe, one end of shell is provided with water outlet, filter core is provided in shell, water enters in shell from water inlet pipe and is discharged by water outlet after filter element filtering, realizes filtering, is provided with outer filter core mounting base, outer filter core, inner filter core mounting base, inner filter core in the shell, valve body is provided on the inside of inner filter core mounting base right end, inner filter core, valve inner is equipped with spool.The utility model is mounted with pressure limiting valve among filter core, after generation builds the pressure, when build the pressure reach 7MPa when, pressure limiting valve opening damages filter core to prevent from building the pressure.Inner filter core mounting base is rotated, is backwashed using bottom pressure after being rotated in place, after the completion of backwash, i.e., rotatable inner filter core mounting base makes its reset, goes into operation again, and use is very convenient, and the service life of filter core is also extended.

Description

Pressure limiting classified filtering device can be backwashed

Technical field

The utility model, which belongs to oil field well water injection filter field more particularly to one kind, can backwash pressure limiting and be classified Filter device.

Background technique

In order to make oil field Sustainable high yield stable yields, oil field ultimate recovery is improved, needs to come using the method to oil-bearing stratum flooding Strata pressure is kept, to improve oil well recovery ratio.Oil-field flooding water quality has certain standard, in order to reach standard, needs to note Enter water to be filtered.The water injection filter filter core that oil field uses at present mostly uses stainless steel cloth package carbon steel bracket composition, this Although the filter core of sample can reach certain filter effect, after filtering a period of time, strainer is easy fouling blockage, usually Cause filter to build the pressure, in addition strainer suppressed it is bad, so that filter effect cannot be generated.However replacement filter core is again cumbersome, needs Stop well, termination of pumping, not only influences yield, but also very waste of time.So need it is a kind of will not only build the pressure but also do not need through The often filter of replacement filter core.

Utility model content

To solve the problems, such as that filter builds the pressure and replace filter core inconvenience in background technique, the utility model provides one kind can be anti- Pressure limiting classified filtering device is rinsed, the utility model, which has, not to build the pressure, is not required to the characteristics of frequently replacing filter core.

Technical solution provided by the utility model is: one kind can backwash pressure limiting classified filtering device, the shell including tubular Body, the side of shell are provided with water inlet pipe, and one end of shell is provided with water outlet, are provided with filter core in shell, and water is from water inlet pipe It is discharged in into shell and after filter element filtering by water outlet, realizes filtering, outer filter core installation is provided in the shell Seat, outer filter core, inner filter core mounting base, inner filter core, one end of inside and outside two filter cores be respectively fixedly connected in inner filter core mounting base and In outer filter core mounting base, the other end of inside and outside two filter cores is inserted into shell and surveys in seam allowance, and inner filter core mounting base is located at outer On the inside of filter core mounting base, inner filter core is located at the inside of outer filter core, connector that outer filter core mounting base and outer filter core form and interior The connector of filter core mounting base and inner filter core composition passes through a pressure cap and is encapsulated in shell, and pressure cap is threadedly attached in shell On body, there are annular space A between outer filter core mounting base outer wall right end and shell, and there are annular empty between outer filter core and inner walls Between B, inner filter core mounting base can generate axial displacement, the left and right of inner filter core mounting base relative to pressure cap and shell by helical rotation Two sides offer axial blind hole and radial through-hole, and the axial blind hole in left side is connected to form drain outlet with radial through-hole, right side Axial blind hole be connected to form A sections of overflow ducts with radial through-hole, in the outer filter core mounting base and corresponding to annular space A Position is provided with water hole A corresponding with radial through-hole in inner filter core mounting base, in inner filter core mounting base right end, inner filter core Side is provided with valve body, and there are annular space C, the valve body left side and the overflow ducts A between inner filter core and valve body Section is correspondingly arranged on through-hole, and valve inner is equipped with spool, and spool left end is provided with axial blind hole and radial through-hole, the axial blind hole and Radial through-hole is connected to form B sections of overflow ducts, and shape is docked in A sections and overflow ducts B sections of the overflow ducts through holes in valve end At complete overflow ducts, the side of the valve body is correspondingly arranged on water hole B with overflow ducts B sections, and valve body right end passes through It is threaded with silk plug, spring is provided between spool and silk plug；

The water inlet pipe outer wall bypass has sampling valve, is communicated with pressure gauge in sampling valve.

The filter of sequence is provided on the side wall of clearance fit between the inner filter core and outer filter core, inner filter core and outer filter core Water hole, the outer diameter of inner filter core are identical with the reference dimension of the internal diameter of outer filter core.

The utility model has the following beneficial effects: the utility model is mounted with pressure limiting valve among filter core, when being mixed with for filter core Matter is excessive, after generation builds the pressure, when build the pressure reach 7MPa when, pressure limiting valve opening, the pressure of package unit is stablized in 7MPa, passes through When pressure gauge observes this case, illustrates that impurity is excessive between filter core, need to backwash.When backwash, water main valve is closed Backwash outlet (i.e. the left end of inner filter core mounting base) is connected corresponding recyclable device by door, rotates inner filter core mounting base, rotation It is backwashed afterwards using bottom pressure in place, after the completion of backwash, i.e., rotatable inner filter core mounting base makes its reset, weight New to go into operation, use is very convenient, and the service life of filter core is also extended.

Detailed description of the invention

The structural schematic diagram of the utility model when Fig. 1 is normal filtration.

Fig. 2 is the A direction view of Fig. 1.

The structural schematic diagram of the utility model when Fig. 3 is backwash.

In figure: the drain outlet 1-, 2- pressure cap, 3- inner filter core mounting base, the outer filter core mounting base of 4-, A sections of 5- overflow ducts, 6- B sections of overflow ducts, 7- water inlet pipe, 8- shell, the outer filter core of 9-, 10- inner filter core, 11- silk plug, 12- filtration hole, 13- spring, 14- Spool, 15- water hole B, 16- water hole A, 17- pressure gauge, 18- sampling valve, 19- water outlet, 20- backwash outlet, 21- ring Shape space A, 22- annular space B, 23- valve body, 24- annular space C.

Specific embodiment

The utility model is described further below in conjunction with attached drawing:

The present embodiment includes the shell 8 of tubular, and the side of shell 8 is provided with water inlet pipe 7, and one end of shell 8 is provided with out The mouth of a river 19, is provided with filter core in shell 8, and water enters in shell 8 from water inlet pipe 7 and after filter element filtering by 19 row of water outlet Out, it realizes filtering, is provided with outer filter core mounting base 4, outer filter core 9, inner filter core mounting base 3, inner filter core 10 in the shell 8, One end of inside and outside two filter cores is respectively fixedly connected in inner filter core mounting base 3 and outer filter core mounting base 4, inside and outside two filter cores The other end is inserted into 8 inside seam allowance of shell, and inner filter core mounting base 3 is located at outer 4 inside of filter core mounting base, and inner filter core 10 is located at The connector and inner filter core mounting base 3 and inner filter core 10 that the inside of outer filter core 9, outer filter core mounting base 4 and outer filter core 9 form The connector of composition passes through a pressure cap 2 and is encapsulated in shell 8, and pressure cap 2 is threadedly attached on shell 8, outer filter core peace It fills between 4 outer wall right end of seat and shell 8 there are annular space A21, there are annular space B22 between 8 inner wall of outer filter core 9 and shell, Inner filter core mounting base 3 can generate axial displacement, the left and right of inner filter core mounting base 3 relative to pressure cap 2 and shell 8 by helical rotation Two sides offer axial blind hole and radial through-hole, and the axial blind hole in left side is connected to form drain outlet 1, right side with radial through-hole Axial blind hole be connected to form overflow ducts A section 5 with radial through-hole, it is right with annular space A21 institute in the outer filter core mounting base 4 The position answered is provided with water hole A16 corresponding with radial through-hole in inner filter core mounting base 3, in 3 right end of inner filter core mounting base, interior The inside of filter core 10 is provided with valve body 23, and there are annular space C24,23 left ends of valve body between inner filter core 10 and valve body 23 Face and the overflow ducts A section 5 are correspondingly arranged on through-hole, are equipped with spool 14 inside valve body 23,14 left end of spool is provided with axial direction Blind hole and radial through-hole, the axial blind hole are connected to form overflow ducts B section 6 with radial through-hole, and overflow ducts A section 5 and overflow are logical Road B section 6 docks to form complete overflow ducts in the through hole of 23 end of valve body, the side of the valve body 23 and overflow ducts B section 6 is correspondingly arranged on water hole B15, and 23 right end of valve body has been connected through a screw thread silk plug 11, has been arranged between spool 14 and silk plug 11 There is spring 13；

The filter of sequence is provided on the side wall of clearance fit between inner filter core 10 and outer filter core 9, inner filter core 10 and outer filter core 9 Water hole 12；

7 outer wall of the water inlet pipe bypass has sampling valve 18, and pressure gauge 17 is communicated in sampling valve 18.

The outer diameter of the inner filter core 10 is identical with the reference dimension of the internal diameter of outer filter core 9, inner filter core 10 and outer filter core 9 Cooperation section is divided into identical three sections of length, and the fit tolerance of three sections is gradually increased from left to right.Described is outer The inner hole of filter core 9 uses the tolerance range of H7 (0~0.046), and the outside of the inner filter core 10 is segmented use-from left to right 0.05~-0.1, -0.1~-0.2 and -0.2~-0.3 tolerance range.

The utility model has been mounted with the valve mechanism of pressure limiting effect among filter core, when impurity is excessive between filter core, produces It is raw build the pressure after, build the pressure when reaching 7MPa, the pressure of pressure limiting valve opening, package unit is stablized in 7MPa, is seen by pressure gauge 17 When observing this case, illustrates that impurity is excessive between filter core, need to backwash.When backwash, water total valve is closed, will be recoiled It washes out mouth 20 and connects corresponding recyclable device, rotate inner filter core mounting base 3, carried out using bottom pressure after being rotated in place anti- It rinses, after the completion of backwash, i.e., rotatable inner filter core mounting base 3 makes its reset, goes into operation again, use is very convenient, filter core Service life is also extended.

Specific use process is as follows for the present apparatus:

1. when normal filtration process, rotating inner filter core mounting base 3, overflow ducts A section 5 being made to be aligned (such as Fig. 1 with water hole A It is shown), water is entered in annular space B22 and annular space A21 by water inlet pipe 7, on the one hand water passes through inside and outside two layers of filter core Between gap be filtered after from water outlet 19 flow out, on the other hand from overflow ducts arrive at spool 14 from,

Inner filter core 10 divides three sections different for tolerance, from left to right the fit tolerance between each section and outer filter core 9 Increase step by step, form three sections of different inside and outside filter core gaps, water passes sequentially through filtration hole 12 on outer filter core 9, inside and outside filter core gap And the filtration hole 12 on inner filter core 9 reaches 10 inside of inner filter core, impurity is stuck in inside and outside filter core gap, to realize It filters, under water injection well up to standard.When the gap accumulated impurity between inside and outside filter core reaches a certain level, when there is Severe blockage, water Can not be flowed out by gap, the situation to build the pressure can be generated, when build the pressure reach setting value when, hydraulic pressure pushes to the right spool 14, when When overflow ducts B section 6 is aligned with the water hole B15, water is directly injected into underground without filtering, so that reaching prevents from building the pressure Purpose.The present apparatus passes through the valve mechanism for having installed pressure limiting effect, and after pressure reaches limit value, valve is opened, and efficiently solves filter Core obstruction after-filter the problem of building the pressure, at the same avoid build the pressure caused by filter core damage.Pass through pressure gauge in observation sampling valve Reading whether reach setting pressure, can judge whether filter core has blocked, decide whether to backwash filter core.

2. in backwash process, closing inlet valve, corresponding recyclable device is connected on sewage draining exit 20 and (contains the appearance of sewage Device), inner filter core mounting base 3 is rotated, inner filter core mounting base 3 moves axially relative to pressure cap 2 under the action of helicitic texture, makes to arrange Dirty channel 1 is aligned with the water hole A16 to which annular space A21 to be connected to drain outlet 1, according to rushing from right to left Washing lotion flow direction, backwash water enter from apopore 19, and to filter core backwash from inside to outside, the sewage after backwash passes sequentially through annular space B22, annular space A21 and drain outlet 1 are flowed out, and are collected by recyclable device.During the backwash process, it appropriate can rotate Inner filter core mounting base 3, to change backwash water pressure, makes two layers of filter to change the connection area of drain outlet 1 Yu water hole A16 Impurity among core is washed out as far as possible.After backwash, inner filter core mounting base 3 is rotated backward, makes its reset, then opens Inlet valve is opened, filter is put into filtration again.

In order to make influent quality reach the requirement of standard, need to filter off the small part small particle impurity in intaking, a part Middle partial size impurity and most of big partial size impurity use between inner filter core and outer filter core and divide to realize better filter effect The inner hole of grade filter type, outer filter core uses interporal lacuna fit tolerance zone, and inner filter core is divided into three sections, from left to right three sections of inner filter cores Outer wall using shaft clearance fit tolerance zone incremental step by step, incremental clearance fit tolerance range, produces three Duan Butong step by step Outer filter core and inner filter core between fit tolerance, i.e., three sections different inside and outside filter core gaps in this way can be to three kinds of diameter sections Different impurity are filtered, and have thus achieved the effect that classified filtering, and the length of every section of inner filter core can meet flow surface Long-pending requirement, small particle impurity are stuck in first segment gap, and middle partial size impurity is stuck in second segment gap, and big partial size impurity is stuck in In third section gap, guarantee different segmentations for filtering different impurities particle size interval, the mode filter effect of classified filtering is more It is good.It should be noted that in the prior art, filter core quickly blocks in order to prevent, the filter hole on filter core allows small particle impurity Passing through, that is to say, that existing filter cannot filter out small particle impurity, and in the present invention, small particle impurity Although can still pass through from above-mentioned second segment gap and third section gap with middle partial size impurity, can be filtered in first segment gap Out, therefore, the utility model has certain filter effect to small particle impurity, and filters out sub-fraction small particle impurity to water The improvement of matter is also quite apparent.

Claims (2)

1. one kind can backwash pressure limiting classified filtering device, the shell (8) including tubular, the side of shell (8) is provided with into water It manages (7), one end of shell (8) is provided with water outlet (19), and filter core is provided in shell (8), and water enters shell from water inlet pipe (7) (8) it is discharged in and by water outlet (19) after filter element filtering, realizes filtering, it is characterised in that: setting in the shell (8) There are outer filter core mounting base (4), outer filter core (9), inner filter core mounting base (3), inner filter core (10), one end difference of inside and outside two filter cores It is fixedly connected in inner filter core mounting base (3) and outer filter core mounting base (4), the other end of inside and outside two filter cores is inserted into shell (8) in the seam allowance of inside, inner filter core mounting base (3) is located on the inside of outer filter core mounting base (4), and inner filter core (10) is located at outer filter core (9) Inside, the connector and inner filter core mounting base (3) and inner filter core (10) of outer filter core mounting base (4) and outer filter core (9) composition The connector of composition passes through a pressure cap (2) and is encapsulated in shell (8), and pressure cap (2) is threadedly attached on shell (8), There are annular space A (21), outer filter core (9) and shell (8) inner walls between outer filter core mounting base (4) outer wall right end and shell (8) Between there are annular space B (22), inner filter core mounting base (3) can generate axis relative to pressure cap (2) and shell (8) by helical rotation To displacement, the left and right sides of inner filter core mounting base (3) offers axial blind hole and radial through-hole, the axial blind hole and diameter in left side It is connected to be formed drain outlet (1) to through-hole, the axial blind hole on right side is connected to radial through-hole to form A sections of overflow ducts (5), described It is provided with and radial through-hole on inner filter core mounting base (3) on outer filter core mounting base (4) with position corresponding to annular space A (21) Corresponding water hole A (16) is provided with valve body (23), inner filter core on the inside of inner filter core mounting base (3) right end, inner filter core (10) (10) between valve body (23) there are annular space C (24), the valve body (23) left side with described A sections of overflow ducts (5) it is correspondingly arranged on through-hole, is equipped with spool (14) inside valve body (23), spool (14) left end is provided with axial blind hole and radial direction is logical Hole, the axial blind hole are connected to form B sections of overflow ducts (6), A sections of overflow ducts (5) and B sections of overflow ducts (6) with radial through-hole It docks to form complete overflow ducts in the through hole of valve body (23) end, the side of the valve body (23) and overflow ducts B Section (6) is correspondingly arranged on water hole B (15), and valve body (23) right end has been connected through a screw thread silk plug (11), spool (14) and silk plug (11) spring (13) are provided between；

Water inlet pipe (7) the outer wall bypass has sampling valve (18), and pressure gauge (17) are communicated in sampling valve (18).

2. one kind according to claim 1 can backwash pressure limiting classified filtering device, it is characterised in that: the inner filter core (10) filtration hole of sequence is provided on the side wall of the clearance fit between outer filter core (9), inner filter core (10) and outer filter core (9) (12), the outer diameter of inner filter core (10) is identical with the reference dimension of the internal diameter of outer filter core (9).