CN108626415B - A kind of float-type lift valve in filter tank - Google Patents
A kind of float-type lift valve in filter tank Download PDFInfo
- Publication number
- CN108626415B CN108626415B CN201810247127.1A CN201810247127A CN108626415B CN 108626415 B CN108626415 B CN 108626415B CN 201810247127 A CN201810247127 A CN 201810247127A CN 108626415 B CN108626415 B CN 108626415B
- Authority
- CN
- China
- Prior art keywords
- filter tank
- floating drum
- water
- outlet
- float
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/38—Feed or discharge devices
- B01D24/42—Feed or discharge devices for discharging filtrate
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
- F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
- F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
A kind of float-type lift valve in filter tank, it is equipped with the inlet and outlet pipes for entering filter tank and backwashing water outflow filter tank for water to be filtered vertically in filter tank, valve seat is equipped in the upper port of the inlet and outlet pipes, the spool for moving up and down and being opened and closed with control valve can be driven by driving mechanism by being equipped with above valve seat, the floating drum that can be suspended in water is arranged in the upper end of inlet and outlet pipes, the open upper end of floating drum forms intake-outlet, the inner sidewall of floating drum and the lateral wall of inlet and outlet pipes are slidably and sealingly connected with, floating drum is set to float up and down with the variation of water level in filter tank along inlet and outlet pipes, to change the height of floating drum upper end intake-outlet.The height of intake-outlet also changes with liquid level and is changed, and is adapted always with filter tank liquid level in backwash drainage procedure, prevents drainage from outflowing with water.It backwashes more efficient, can reduce backwash number, shorten backwashing time, improve the service efficiency in filter tank.
Description
Technical field
It is specifically a kind of for filter tank water inlet to be filtered and backwash draining the present invention relates to a kind of filter tank valve
Water valve.
Background technique
In water-purifying process, filter is one of pith.In filter process, the impurity that is filtered out in water
It can constantly be accumulated in filter material layer, the excessive effluent quality that will lead to of accumulation is unqualified, makes to produce the reduction of water efficiency.Therefore it needs to pass through
The impurity accumulated in filter material layer is removed in backwash.In backwash process, water or air-flow reverse impact filter material layer make to sink in filter material layer
Long-pending impurity loosens, abjection suspends in water, and is discharged later with water to achieve the purpose that cleaning.Due to during the backwash process,
Impurity can not only be flushed out from filter material layer water, part filtrate can also suspend in water under impact, if backwash draining side
Formula is improper, will lead to filtrate and is discharged with water, so that filtrate be caused to lose.
Currently, the backwash discharge outlet in most of filter tanks is all to be fixedly mounted, and if installation site is excessively high, backwash row
The muddy water stayed in filter tank after water is more, then the number needs backwashed increase accordingly, if installation site is too low, suspends in water
Filtrate make a slip of the tongue closely from draining, in drainage procedure filtrate loss will increase.
In addition, due to the liquid level in drainage procedure in filter tank be it is continually changing, draining start when, liquid level be higher than draining
Mouthful, water and impurity can be discharged from discharge outlet, and when below the near discharge outlet of liquid level, then drain stopping.When initial draining
Liquid level determines the time of lasting draining, if initial stage liquid level is excessively high, the filtrate to suspend in water is easy and impurity one
With being discharged, filterins media run-off is caused to increase.If initial stage liquid level is too low, water discharge time is too short, it is difficult to sufficiently arrange impurity
Out, standard is not achieved in effluent characteristics, causes washing time and time to increase, cannot achieve the purpose that energy-saving and water-saving.
Summary of the invention
The technical problem to be solved by the present invention is to overcome existing filter tank draining open height to fix, filter tank liquid level is not adapted to
Variation, filtrate loses big problem when draining, provides a kind of float-type lift valve in filter tank.
Used technical solution is the present invention to solve above-mentioned technical problem: a kind of float-type lift valve in filter tank,
In filter tank vertically be equipped with one for water to be filtered enter filter tank and backwashing water outflow filter tank inlet and outlet pipes, it is described into
It is equipped with valve seat in the upper port of outlet pipe, is opened and closed above valve seat equipped with that can be moved up and down by driving mechanism drive with control valve
Spool, be arranged with the floating drum that can be suspended in water in the upper end of inlet and outlet pipes, the open upper end of floating drum forms disengaging
The mouth of a river, the inner sidewall of floating drum and the lateral wall of inlet and outlet pipes are slidably and sealingly connected with, and enable floating drum with the variation of water level in filter tank
And float up and down along inlet and outlet pipes, to change the height of floating drum upper end intake-outlet.
The intake-outlet of the floating drum upper end is horn-like in expanding outwardly.
The floating body that can be swum on the water surface is fixed on the floating drum.
Floating body there are four being uniformly distributed on the circumferencial direction of the floating drum.
The buoyancy size of the floating drum floating in water makes the upper edge of floating drum upper end intake-outlet be in the water surface hereinafter, for example
5-the 15cm below the water surface.
The spool is driven by push-rod electric machine and is moved up and down.
The valve seat and spool has the conical seal (contact) face for sealing against each other cooperation.
The center in filter tank is arranged in the inlet and outlet pipes, and lower end is connected by pipeline with the interface of filter tank side wall.
The lower end of the floating drum is equipped with the limiting device for limiting its maximum lifting height.
The beneficial effects of the present invention are: cover inlet and outlet pipes upper end floating drum floatability in water, and can be in filter tank
The variation of water level and float up and down, so that the height of floating drum upper end intake-outlet is also changed with liquid level and is changed, drained in backwash
It is adapted always with filter tank liquid level in the process, prevents drainage from outflowing with water.The liquid level that filter back washing drains the initial stage can be with
A higher height is promoted to without worrying filtrate loss, thus backwash is more efficient, can reduce backwash number,
Shorten backwashing time, improves the service efficiency in filter tank.
It can adapt to liquid level variation automatically by the way of floating drum floating, setting can be remained between intake-outlet and liquid level
Difference in height.This self-reacting mode is not required to a series of by level gauging, control system calculating, driving mechanism movement etc.
Troublesome operation, thus, compared with through the method for driving mechanism active control, between the adjustment of intake-outlet height and liquid level variation
Almost without delay, not only precision is higher, and does not need complicated control system, and terseness and stability are all more preferable.
Detailed description of the invention
Fig. 1 is mounting structure schematic diagram of the float-type lift valve of the present invention in filter tank.
Fig. 2 is the schematic diagram of pontoon position variation behind filter tank water level decreasing shown in Fig. 1.
Fig. 3 is the embodiment schematic diagram that four floating bodies are arranged in floating drum.
Marked in the figure: 1, filter tank, 2, inlet and outlet pipes, 3, valve seat, 4, driving mechanism, 5, spool, 6, floating drum, 601, floating
Body, 7, intake-outlet, 8, filter material layer, 9, water purification outlet, 10, backwash tube.
Specific embodiment
Clear, complete explanation is carried out to technical solution of the present invention below in conjunction with the drawings and the specific embodiments.Below
Particular content listed by embodiment is not limited to skill necessary to the technical solution technical problems to be solved of claim record
Art feature.Meanwhile described enumerate be embodiment is only a part of the invention, rather than whole embodiments.
As shown in Figure 1, float-type lift valve of the invention is arranged in filter tank comprising an Inlet and outlet water being vertically arranged
Pipe 2, the inlet and outlet pipes 2 enter filter tank for water to be filtered, while being also used as drainpipe during the backwash process, for recoiling
Wash water flows out filter tank.Inlet and outlet pipes 2 are preferably provided at the center in filter tank 1, convenient for the impurity on liquid level when backwash draining in
Heart aggregation discharge.Certainly, it is also feasible by the position that inlet and outlet pipes are positioned away from center, such as is arranged in the one of filter tank
Side.It is discharged correspondingly, the impurity on liquid level needs to assemble to filter tank side.
The lower end of inlet and outlet pipes 2 is connected to outside filter tank by pipeline, such as is connected to the interface of filter tank side wall.It connects at this
Connect the supply line of water to be filtered and the discharge pipe line of backwash muddy water at mouthful with pipeline by corresponding valve.Filter tank is normal
When drainage, the valve of discharge pipe line is closed, and water to be filtered is passed through into filter tank by inlet and outlet pipes 2 from supply line.Filter tank
In backwash process, supply line is closed, and the impurity connected component water on the liquid level of filter tank passes to discharge pipe line row through inlet and outlet pipes 2
Out.
It is equipped with valve seat 3 in the upper port of inlet and outlet pipes 2, is equipped with the spool 5 that can be moved up and down above valve seat 3.Valve seat 3
The valve being switched on or off with 5 composition control inlet and outlet pipes 2 of spool.The concrete form of valve seat 3 and spool 5 can according to need choosing
It selects, the present embodiment selects the form of Conical Valve, has the conical seal (contact) face for sealing against each other cooperation on valve seat 3 and spool 5.Shown in
Spool 5 is by driving mechanism 4, such as drives to move up and down by push-rod electric machine and be opened and closed with control valve.According to the valve specifically used
The drives such as hoist cable, screw rod up and down motion can also be used in form.
The present invention is arranged one in the upper end of inlet and outlet pipes 2 to solve the problems, such as that discharge outlet adapts to the variation of filter tank liquid level
The open upper end of the floating drum 6 that can be suspended in water, the floating drum 6 forms intake-outlet 7.The inner sidewall and inlet and outlet pipes 2 of floating drum 6
Lateral wall be directly slidable, and be sealing.Therefore, the inlet and outlet pipes 2 for being set with floating drum 6, which form upper end, to stretch
The form of contracting.Between floating drum 6 and inlet and outlet pipes 2 size of force of sliding friction should not hinder floating drum 6 under the buoyancy of water on
It rises, the decline of floating drum under the effect of gravity after equally should not also hindering liquid level to decline.Therefore, which is actually and is suspended in
In water, it can float up and down with the variation of water level in filter tank 1 along inlet and outlet pipes 2.With floating up and down for floating drum 6, thereon
The height also corresponding variation up and down of intake-outlet 7 is held, and the variation is adapted with the variation of liquid level always.
As shown in Figure 1, floating drum 6 rises to one along inlet and outlet pipes 2 under the buoyancy of water when water level increases in filter tank
A higher position.And with the discharge of dampening, as shown in Fig. 2, floating drum 6 is also accordingly along Inlet and outlet water when water level decreasing in filter tank
Pipe 2 declines.But intake-outlet 7 keeps a relatively fixed position with the water surface always.
Filter tank equipped with float-type lift valve of the present invention in normal work, the supply line and inlet and outlet pipes of water to be filtered
2 conductings, spool 5 rise under the drive of driving mechanism 4, open valve.Water to be filtered enters in filter tank from intake-outlet 7,
Water purification outlet discharge after the filter material layer filtering in filter tank, from the pool wall of filter material layer lower section.
With the progress of filtering, the impurity deposited in filter material layer gradually increases.When impurity excessively hinders filtering to lead to liquid level
The water purification of predetermined value or discharge is risen to after detection turbidity is greater than predetermined value, can determine whether to need to backwash for filter material layer.This
When, stop the water outlet with water inlet and the water purification for crossing drainage, driving mechanism 4 declines shutdown inlet and outlet pipes with movable valve plug 5.Starting recoil
Washing procedure carries out backwash gas punching using the backwash tube below filter material layer and/or water rushes.With the progress of backwash, impurity
It is rinsed out from filter material layer, the liquid level in filter tank is gradually increasing.Floating drum 6 also rises with it, make intake-outlet 7 always with water
Face keeps a relatively fixed position.After liquid level reaches the high point of setting, stop backwash gas punching and water punching.Driving mechanism
4 band movable valve plugs 5 rise, and opening valve makes muddy water enter inlet and outlet pipes 2 by 7 mouthfuls of intake-outlet, and is discharged through discharge pipe line.
In drainage procedure, since intake-outlet 7 and the relative position of the water surface are fixed always, and the relative position is through anti-
Rinse what experiment was accurately calculated according to the thickness of row's muddy water layer and the buoyancy of floating drum, the upper edge of intake-outlet 7 is in always
The water surface is with next suitable height.Therefore, liquid level and the difference in height on edge on intake-outlet 7 were both not too big, can prevent filtrate
Enter inlet and outlet pipes 2 with water flow and filtrate is caused to lose.Difference in height will not be too small simultaneously, it is ensured that the impurity energy on liquid level
It is enough to be smoothly discharged with water.
Intake-outlet 7 can be made to adapt to the variation of liquid level automatically by the way of floating drum floating, between intake-outlet and liquid level
It can remain the difference in height of setting.The liquid level of filter back washing draining initial stage can be promoted to a higher height and
Difference in height when without having to worry about draining between liquid level and intake-outlet 7 is excessive and filtrate is caused to lose, it is thus possible to reduce recoil
Number is washed, shortens backwashing time, improves the service efficiency in filter tank.This self-reacting mode be not required to by level gauging,
A series of troublesome operations such as control system calculates, driving mechanism acts, thus, with the method phase for passing through driving mechanism active control
Than almost without delay between the adjustment of intake-outlet height and liquid level variation, not only precision is higher, and does not need complicated control
System processed, terseness and stability are all more preferable.
The intake-outlet 7 of 6 upper end of floating drum is expanded outwardly in horn-like, and nozzle increases after extension, convenient on liquid level
Impurity collects discharge to it.
Floating drum 6 can be used material with larger buoyancy itself and make, and can suspend in water.Can also using than
The main body of the materials such as firmer but heavier metal production floating drum 6 itself, and in the fixed specific larger buoyancy in its periphery can
Swim in the floating body 601 on the water surface.The larger buoyancy of the floating body 601 can be brought by its material itself, can also be with
It is realized using frame mode, for example, by using hollow structure, such as hollow float.The setting quantity of floating body 601 and specific installation
Mode is set as needed.Such as it is directly anchored on the outer wall of cylindrical body, or be fixed on from cylindrical body to extension
In the connection support bar of stretching.In embodiment illustrated in fig. 3, fixed in the form of connection support bar there are four spherical floating bodies
601, four spherical float bodies 601 are uniformly distributed along the circumferencial direction of floating drum 6, to guarantee that 6 surrounding buoyancy of floating drum is uniform.
Limiting device is set in the lower end of floating drum 6,6 sets of floating drum can be kept in inlet and outlet pipes 2, and be unlikely to due to upper
It rises excessively high and is detached from, it is also possible to limit its maximum lifting height by limiting device.The concrete form of limiting device can be with
Using the form in the inwardly projecting convex block of 6 lower end inside of floating drum setting, with stop member fixed on the outside of 2 upper end of inlet and outlet pipes
It matches and plays position-limiting action.It can also be limited by way of setting guide groove and sliding block.It specifically can root using which kind of form
According to specifically needing to select.Equally, limiting device also can be set in the upper end of floating drum 6, for limiting the maximum that it is moved downward
Stroke, set-up mode are similar with the limiting device of lower end.
In backwash bleeding stage, intake-outlet 7 needs the water surface in filter tank hereinafter, to make the impurity on liquid level
It can be smoothly discharged.The height that intake-outlet 7 specifically suspends is determined by the buoyancy of floating drum 6 in water, and the buoyancy size of floating drum 6
It can be by selecting type, size, the quantity etc. of buoyant material to be adjusted.Pass through the fortune to filtrate in backwash process in water
Dynamic rule, thickness of water surface impurity layer etc. are studied, and being computed determination makes the upper edge of 6 upper end intake-outlet 7 of floating drum be in water
5-15cm below face are proper, and optimal is 10cm.Intake-outlet 7 can remain at liquid in backwash drainage procedure
Such position below face, can either be such that impurity is sufficiently discharged, and prevent filtrate to flow into inlet and outlet pipes 2 with water to greatest extent,
Reduce filtrate loss.
Technical concept and its core concept of the invention are merely used to help understand to the explanation of specific embodiment above,
Technical solution is described and illustrated although there is used herein specific preferred embodiments, should not be construed as to this hair
Itself bright limitation.Those skilled in the art, can be to it in form and carefully under the premise of not departing from the technology of the present invention design
It is made a variety of changes on section.These change or replacement readily occurred in should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of float-type lift valve in filter tank, it is characterised in that: be equipped with one vertically in filter tank (1) and be used for water to be filtered
Into the inlet and outlet pipes (2) in filter tank and backwashing water outflow filter tank, valve seat is equipped in the upper port of the inlet and outlet pipes (2)
(3), the spool (5) that moves up and down and be opened and closed with control valve can be driven by driving mechanism (4) by being equipped with above valve seat (3), into
The upper end of outlet pipe (2) is arranged with the floating drum (6) that can be suspended in water, and the open upper end of floating drum (6) forms Inlet and outlet water
Mouth (7), the inner sidewall of floating drum (6) and the lateral wall of inlet and outlet pipes (2) are slidably and sealingly connected with, and make floating drum (6) can be with filter tank (1)
The variation of interior water level and float up and down along inlet and outlet pipes (2), to change the height of floating drum (6) upper end intake-outlet (7), make to pass in and out
The mouth of a river keeps a relatively fixed position with the water surface always.
2. a kind of float-type lift valve in filter tank as described in claim 1, it is characterised in that: floating drum (6) upper end
Intake-outlet (7) is horn-like in expanding outwardly.
3. a kind of float-type lift valve in filter tank as described in claim 1, it is characterised in that: solid on the floating drum (6)
Surely there is the floating body (601) that can be swum on the water surface.
4. a kind of float-type lift valve in filter tank as claimed in claim 3, it is characterised in that: the circumference of the floating drum (6)
There are four being uniformly distributed on direction floating body (601).
5. such as a kind of described in any item float-type lift valves in filter tank of claim 1-4, it is characterised in that: the floating drum
(6) the buoyancy size of floating in water makes the upper edge of floating drum (6) upper end intake-outlet (7) be in the water surface or less.
6. such as a kind of described in any item float-type lift valves in filter tank of claim 5, it is characterised in that: the floating drum (6)
The buoyancy size of floating in water makes the upper edge of floating drum (6) upper end intake-outlet (7) be in 5-15cm of the water surface or less.
7. a kind of float-type lift valve in filter tank as described in claim 1, it is characterised in that: the spool (5) is by pushing away
Bar motor, which drives, to move up and down.
8. a kind of float-type lift valve in filter tank as claimed in claim 1 or 7, it is characterised in that: the valve seat (3) and
Spool (5) has the conical seal (contact) face for sealing against each other cooperation.
9. a kind of float-type lift valve in filter tank as described in claim 1, it is characterised in that: the inlet and outlet pipes (2)
Center in filter tank (1) is set, and lower end is connected by pipeline with the interface of filter tank side wall.
10. a kind of float-type lift valve in filter tank as described in claim 1, it is characterised in that: the lower end of the floating drum (6)
Equipped with the limiting device for limiting its maximum lifting height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247127.1A CN108626415B (en) | 2018-03-23 | 2018-03-23 | A kind of float-type lift valve in filter tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810247127.1A CN108626415B (en) | 2018-03-23 | 2018-03-23 | A kind of float-type lift valve in filter tank |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108626415A CN108626415A (en) | 2018-10-09 |
| CN108626415B true CN108626415B (en) | 2019-08-20 |
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ID=63696281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810247127.1A Expired - Fee Related CN108626415B (en) | 2018-03-23 | 2018-03-23 | A kind of float-type lift valve in filter tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108626415B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110347190B (en) * | 2019-07-11 | 2024-06-21 | 珠海横琴新区圣大环保科技有限公司 | Water body communication liquid level regulator and operation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080257802A1 (en) * | 2007-04-18 | 2008-10-23 | Friel Daniel D | Advanced household water purification means |
| CN202876460U (en) * | 2012-10-14 | 2013-04-17 | 青岛小川环保设备有限公司 | Adjustable backwashing water quantity sand filtering equipment |
| CN103073106B (en) * | 2013-02-07 | 2014-04-30 | 成都信息工程学院 | Buoyancy ascending-descending water decanter and implementation method thereof |
| CN203389383U (en) * | 2013-08-06 | 2014-01-15 | 深圳市比斯坦科技有限公司 | Oily wastewater filter |
| CN203678035U (en) * | 2014-01-26 | 2014-07-02 | 程继顺 | Double-layer filter material filter for treating oilfield produced water |
| CN204619462U (en) * | 2015-01-13 | 2015-09-09 | 马钢(集团)控股有限公司 | Filter tank water inlet automaton |
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2018
- 2018-03-23 CN CN201810247127.1A patent/CN108626415B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN108626415A (en) | 2018-10-09 |
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