CN103498963B - A kind of filter tap - Google Patents
A kind of filter tap Download PDFInfo
- Publication number
- CN103498963B CN103498963B CN201310513714.8A CN201310513714A CN103498963B CN 103498963 B CN103498963 B CN 103498963B CN 201310513714 A CN201310513714 A CN 201310513714A CN 103498963 B CN103498963 B CN 103498963B
- Authority
- CN
- China
- Prior art keywords
- valve body
- diaphragm
- filter tap
- positioning seat
- baffle plate
- 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
Links
- 238000001914 filtration Methods 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 4
- 239000000356 contaminant Substances 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 21
- 230000008859 change Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
- B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Fluid-Driven Valves (AREA)
- Details Of Valves (AREA)
Abstract
The invention provides a kind of filter tap, belong to field of mechanical technique.It solve the problem that existing filter tap contaminant filter is unclean, filter screen is easily bad.This filter tap comprises the inner valve body for cavity, the two ends, left and right of described valve body are respectively feed-water end and waterexit end, described valve body internal fixtion has the filtration spring perpendicular with water (flow) direction and is positioned at the diaphragm filtered above spring, stressed member is fixed with bottom described diaphragm, the two ends of described filtration spring lean respectively on the inwall of stressed member and valve body, valve body is separated into control chamber and filtering cavity by described diaphragm, feed-water end and the waterexit end of described filtering cavity and valve body are connected, and described valve body upper end sidepiece is also connected with the pilot communicated with control chamber and takes over.This filter tap there is good filtration effect and filtering function not by advantages such as variation in water pressure affect.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of filter tap.
Background technique
Filter tap is also known as filter; that one carries out filtering pretreated device; it is the indispensable a kind of device of tubing of fed sheet of a media; it is installed on the entrance point of the equipment such as irrigation control valve, reduction valve, Valve for keeping constant water level usually; be used for eliminating the impurity in medium; prevent graininess impurity inlet passage, with the accessory on proterctive equipment pipeline from wearing and tearing and blocking.
Filter tap is widely used in industrial production and daily life, uses filter tap the most general to be the inner filter tap adopting filter net type at present, namely arranges one deck filter screen at the body cavity of filter tap and filter impurity.As Chinese patent discloses a kind of filter tap [application number: 201020300385.0; Notification number: CN201599489U], it comprises valve body, valve body has a blow down branch communicated with body cavity, a filtration core is provided with in blow down branch, the valve gap that one presses filtration core is provided with in the port of blow down branch, valve gap has a sewage draining exit, sewage draining exit place is provided with a Sealing.This filter tap utilizes filtration core to filter medium, and can carry out blowdown by being taken off by Sealing easily and clean filtration core.
The filtration core used in above-mentioned filter tap is identical with traditional filter tap, is all the filter screen of plane type, and therefore come with some shortcomings part.First, the filter area of filter screen is little, and the size of each mesh is identical on filter screen, just requirement is had to the size of impurity when therefore filtering, the impurity particle that the mesh of volume ratio filter screen is large can be filtered, the impurity that volume is less than filter screen mesh then can not be filtered, and therefore use value is not high.In addition, when velocity of medium is very fast, impurity can cause larger impact to filter screen surface, and generally adopts steel wire to make due to filter screen, after so long-time shock, filter screen easily deforms and loses filtering effect, often changes the waste that filter screen can cause again resource.
Summary of the invention
The object of the invention is for prior art exist the problems referred to above, propose a kind of good filtration effect and filtering function not by the filter tap that variation in water pressure affects.
Object of the present invention realizes by following technical proposal: a kind of filter tap, comprise the inner valve body for cavity, the two ends, left and right of described valve body are respectively feed-water end and waterexit end, it is characterized in that, described valve body internal fixtion has the filtration spring perpendicular with water (flow) direction and is positioned at the diaphragm filtered above spring, stressed member is fixed with bottom described diaphragm, the two ends of described filtration spring lean respectively on the inwall of stressed member and valve body, valve body is separated into control chamber and filtering cavity by described diaphragm, feed-water end and the waterexit end of described filtering cavity and valve body are connected, described valve body upper end sidepiece is also connected with the pilot communicated with control chamber and takes over.
When practical application, the valve body of filter tap is arranged in controlled pipe-line system, and the end that pilot is taken over is connected with controlled pipe-line system front end.When assembling, the quantity of the filtration spring in filter tap valve body can set according to the size of impurity, the compression clearance of filter tap is utilized to filter impurity, the filtration spring of some quantity can form the filtration of multilayer stereo formula, not only improve filtering effect well, and not yielding owing to filtering spring, therefore long service life.
In addition, when intake pressure becomes large, because pilot adapter is connected with controlled pipe-line system front end, therefore the pressure increase in the control chamber of valve body can be made by pilot adapter, under the effect of hydraulic pressure, make diaphragm drive stressed member overcome the elastic force effect of filtration spring and move down, stressed member compresses filtration spring downwards, filter spring and caused gap smaller by compressing, thus the impurity in water cannot be passed through, this ensures that there the filtration spring when hydraulic pressure changes and still can effectively filter.
In above-mentioned filter tap, described valve body upper end is fixed with the lower positioning seat communicated with body cavity, described lower positioning seat has been threaded upper positioning seat, and the edge of described diaphragm to be clamped between positioning seat and lower positioning seat and to form above-mentioned control chamber between diaphragm and upper positioning seat.The upper and lower positioning seat be mutually threaded is connected to valve body upper end, just the edge of diaphragm can be clamped by cooperatively interacting of upper and lower positioning seat like this.
In above-mentioned filter tap, described lower positioning seat has annular positioning groove, the edge bottom of described diaphragm has the annular flange flange matched with annular positioning groove.Cooperatively interacted by the annular positioning groove in the annular flange flange of the edge bottom of diaphragm and lower positioning seat, diaphragm edge can be fixed between upper and lower positioning seat better.
In above-mentioned filter tap, described valve body internal fixtion has the connecting rod perpendicular with water (flow) direction, the upper end of described connecting rod is arranged with baffle plate one and its lower end is fixed with baffle plate two, the face that described baffle plate one and baffle plate two face has the positioning hole one and positioning hole two that face setting mutually respectively, and the two ends of described filtration spring are individually fixed in positioning hole one and positioning hole two.Utilize the positioning hole one on baffle plate one and baffle plate two and positioning hole two to be fixed in valve body by filtration spring, this spline filter spring is just not easy the impact being subject to current pressure change.
In above-mentioned filter tap, described stressed member comprises the adjustable lever be arranged between baffle plate one and diaphragm and the Regulation spring being sheathed on adjustable lever lower end, the two ends of Regulation spring lean respectively on baffle plate one and adjustable lever, adjustable lever stretch between positioning seat and lower positioning seat, adjustable lever upper end is fixed in the center of described diaphragm, described adjustable lever lower end has the attachment hole that internal diameter is greater than small end external diameter, and the upper end of described connecting rod is stretched in the attachment hole of adjustable lever lower end.
When intake pressure becomes large, the elastic force effect that diaphragm drives adjustable lever to overcome Regulation spring downwards moves down, adjustable lever lower end applies downforce to baffle plate one, because baffle plate one is sheathed on connecting rod, and small end stretches in the attachment hole of adjustable lever lower end, therefore, when adjustable lever presses down, baffle plate one moves downward along small end and compresses and filters spring, thus makes the gap smaller of filtering spring.
In above-mentioned filter tap, the center of described diaphragm is sheathed on adjustable lever upper end, described adjustable lever upper end be also arranged with clamping panel and lower clamping panel and diaphragm between upper clamping panel and lower clamping panel, described adjustable lever upper end has also been threaded locking nut, and described locking nut is resisted against on clamping panel.
When mounted, lower clamping panel, diaphragm and upper clamping panel are set on adjustable lever successively, then the upper end of locking nut from adjustable lever is screwed, locking nut thus upper clamping panel is pressed down and finally makes the center of diaphragm be clamped between upper clamping panel and lower clamping panel.
In above-mentioned filter tap, as another kind of situation, described stressed member is the stressed plate be connected in bottom diaphragm, and described baffle plate one leans the base plate at stressed plate under the elastic force effect of filtering spring.
In above-mentioned filter tap, described upper positioning seat sidepiece offers pilot port, and described pilot adapter is threadedly connected to pilot port place.
In use, pilot adapter is used for being connected with the pipeline of controlled pipe-line system front end, when the water in pipeline flows into the filtering cavity in filter tap valve body, a part can flow in the control chamber of valve body through pilot adapter, when the flow velocity of current becomes large, the pressure increase in filtering cavity, diaphragm moves down thus spring is filtered in compression downwards, filter spring and compressed its gap smaller rear, thus make impurity be difficult to pass through.
In above-mentioned filter tap, described valve body lower end is opening-like and be fixed with base at opening, and the port of described valve body lower end has gear edge, described baffle plate two gear along and base between, described baffle plate one leans with the inwall of valve body.Utilize gear along being fixed by baffle plate two with base, such position shelf just can be fixed in valve body.
In above-mentioned filter tap, described described positioning hole two runs through and is arranged on baffle plate two, and the bottom of described base has cavity, is provided with seal ring between described base and valve body lower end, and the place of bottom centre of described base has been threaded blowdown valve.
Positioning hole two runs through and is arranged on baffle plate two, impurity so after filtration after spring filtration can be deposited in the cavity of base through positioning hole two, after blowdown valve is opened, just the impurity be deposited in base can be discharged, the seal ring between valve body and base then can prevent from producing leakage between the two.
In above-mentioned filter tap, between described adjustable lever upper end and upper positioning seat, be provided with Returnning spring, between the two ends of described Returnning spring are shunk respectively inside locking nut and upper positioning seat.Returnning spring is used for reset response, when after the pressure recover balance in pilot chamber, under the effect of Returnning spring, diaphragm is resetted.
Compared with prior art, this filter tap has the following advantages:
1, this filter tap utilizes the compression clearance amount of filtering spring to filter magazine, if the filtration spring of individual quantity forms the filtration of multilayer stereo formula in valve body, not only increases filter area, and also improves filtering effect;
2, this filter tap utilize pilot to take over and diaphragm is engaged in intake pressure change time automatically can adjust and filter the decrement of spring, when guaranteeing high flow rate, impurity also cannot pass through, and use value is higher, and Applicable scope is wider;
3, the quantity of the filtration spring of this filter tap can set according to the size being filtered impurity, not only good filtration effect, and it is not yielding to filter spring, long service life and not fragile, can ensure normal work for a long time.
Accompanying drawing explanation
Fig. 1 is the sectional view of this filter tap.
Fig. 2 is the structural representation under this filter tap between positioning seat and upper positioning seat.
Fig. 3 is the structural representation of position shelf in this filter tap.
In figure, 1, valve body; 2, feed-water end; 3, waterexit end; 4, spring is filtered; 5, diaphragm; 6, control chamber; 7, filtering cavity; 8, lower positioning seat; 9, upper positioning seat; 10, annular positioning groove; 11, annular flange flange; 12, connecting rod; 13, baffle plate one; 14, baffle plate two; 15, positioning hole one; 16, positioning hole two; 17, adjustable lever; 18, Regulation spring; 19, attachment hole; 20, upper clamping panel; 21, lower clamping panel; 22, locking nut; 23, pilot adapter; 24, base; 25, seal ring; 26, blowdown valve; 27, Returnning spring.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment one
As shown in figures 1 and 3, a kind of filter tap, comprise the inner valve body 1 for cavity, the two ends, left and right of valve body 1 are respectively feed-water end 2 and waterexit end 3, valve body 1 internal fixtion has the connecting rod 12 perpendicular with water (flow) direction, the upper end of connecting rod 12 is arranged with baffle plate 1 and the lower end of connecting rod 12 is fixed with baffle plate 2 14, is connected with some filtration springs 4 between baffle plate 1 and baffle plate 2 14, and the two ends of filtering spring 4 lean respectively on baffle plate 1 and baffle plate 2 14.The face that baffle plate 1 is relative with baffle plate 2 14 has respectively positioning hole 1 and the positioning hole 2 16 of setting facing each other, the two ends of filtering spring 4 are individually fixed in positioning hole 1 and positioning hole 2 16.
As depicted in figs. 1 and 2, valve body 1 internal fixtion has diaphragm 5, and valve body 1 is separated into control chamber 6 and filtering cavity 7 by diaphragm 5, and feed-water end 2 and the waterexit end 3 of filtering cavity 7 and valve body 1 are connected.Valve body 1 upper end is fixed with the lower positioning seat 8 communicated with valve body 1 inner chamber, lower positioning seat 8 has annular positioning groove 10, the edge bottom of diaphragm 5 has the annular flange flange 11 matched with annular positioning groove 10, lower positioning seat 8 has been threaded upper positioning seat 9, and the edge of diaphragm 5 to be clamped between positioning seat 9 and lower positioning seat 8 and formation control chamber 6 between diaphragm 5 and upper positioning seat 9.Valve body 1 is also provided with the pilot adapter 23 all communicated with controlled pipe-line system front end and control chamber 6, upper positioning seat 9 sidepiece offers pilot port, and pilot adapter 23 is threadedly connected to pilot port place.
Stressed member is fixed with bottom diaphragm 5, stressed member comprises the adjustable lever 17 be arranged between baffle plate 1 and diaphragm 5 and the Regulation spring 18 being sheathed on adjustable lever 17 lower end, have the shoulder block of protrusion in the middle part of adjustable lever 17, the two ends of Regulation spring 18 lean respectively on the shoulder block of baffle plate 1 and adjustable lever 17.Adjustable lever 17 upper end is stretched between positioning seat 9 and lower positioning seat 8, and adjustable lever 17 lower end has the attachment hole 19 that internal diameter is greater than connecting rod 12 upper end external diameter, and connecting rod 12 upper end is stretched in attachment hole 19.
The center of diaphragm 5 is sheathed on adjustable lever 17 upper end, adjustable lever 17 upper end be also arranged with clamping panel 20 and lower clamping panel 21 and diaphragm 5 between upper clamping panel 20 and lower clamping panel 21, adjustable lever 17 upper end portion has been threaded locking nut 22, and locking nut 22 is resisted against on clamping panel 20.Returnning spring 27 is provided with, between the two ends of Returnning spring 27 are shunk respectively inside locking nut 22 and upper positioning seat 9 between adjustable lever 17 upper end and upper positioning seat 9.
Valve body 1 lower end is opening-like and be fixed with base 24 at opening, and be provided with seal ring 25 between base 24 and valve body 1 lower end, the port of valve body 1 lower end has gear edge, baffle plate 2 14 gear along and base 24 between, baffle plate 1 leans with the inwall of valve body 1.Positioning hole 2 16 runs through and is arranged on baffle plate 2 14, and the bottom of base 24 has cavity, and the blowdown valve 26 that has been threaded at the place of bottom centre of base 24.
During installation, the valve body 1 of this filter tap is installed in controlled pipe-line system, and is connected in the pilot port and controlled pipe-line system front end that are arranged at upper positioning seat 9 sidepiece.This filter tap utilizes between the compression of the some filtration springs 4 be fixed in valve body 1 and filters the impurity in current, the quantity of filtering spring 4 can be exchanged according to the size of impurity in current, each filtration spring 4 forms multi-level three-dimensional filtration, can well by contaminant filter, and impurity sedimentation after filtering bottom valve body 1 after, by opening blowdown valve 26, in time impurity can be discharged, avoiding impurities accumulation too much to affect filtering function.
In order to adapt to the change of intake pressure in controlled pipe-line system, this filter tap has also possessed can change the function of filtering spring 4 decrement according to intake pressure change automatically.Its detailed process is such: during water inlet, water can enter in filtering cavity 7 through the feed-water end 2 of valve body 1, also some water can enter in control chamber 6 through pilot adapter 23 simultaneously, when intake pressure becomes large, hydraulic pressure in control chamber 6 also correspondingly increases, now hydraulic pressure will force diaphragm 5 overcome the elastic force effect of Regulation spring 185 and move down, downward press filtration spring 4 while diaphragm 5 moves down, filter spring 4 compressed thus make gap smaller, the impurity be so blended in high flow rate just can be filtered spring 4 well to be stopped and cannot pass through.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. a filter tap, comprise the inner valve body (1) for cavity, the two ends, left and right of described valve body (1) are respectively feed-water end (2) and waterexit end (3), it is characterized in that, described valve body (1) internal fixtion has the filtration spring (4) perpendicular with water (flow) direction and is positioned at the diaphragm (5) filtering spring (4) top, described diaphragm (5) bottom is fixed with stressed member, the two ends of described filtration spring (4) lean respectively on the inwall of stressed member and valve body (1), valve body (1) is separated into control chamber (6) and filtering cavity (7) by described diaphragm (5), feed-water end (2) and waterexit end (3) of described filtering cavity (7) and valve body (1) are connected, described valve body (1) upper end sidepiece is also connected with the pilot communicated with control chamber (6) and takes over (23), described valve body (1) internal fixtion has the connecting rod (12) perpendicular with water (flow) direction, the upper end of described connecting rod (12) is arranged with baffle plate one (13) and its lower end is fixed with baffle plate two (14), the face that described baffle plate one (13) and baffle plate two (14) face have the positioning hole one (15) and positioning hole two (16) that face setting mutually respectively, the two ends of described filtration spring (4) are individually fixed in positioning hole one (15) and positioning hole two (16).
2. filter tap according to claim 1, it is characterized in that, described valve body (1) upper end is fixed with the lower positioning seat (8) communicated with valve body (1) inner chamber, described lower positioning seat (8) has been threaded upper positioning seat (9), and the edge of described diaphragm (5) to be clamped between positioning seat (9) and lower positioning seat (8) and to form above-mentioned control chamber (6) between diaphragm (5) and upper positioning seat (9).
3. filter tap according to claim 2, it is characterized in that, described lower positioning seat (8) has annular positioning groove (10), and the edge bottom of described diaphragm (5) has the annular flange flange (11) matched with annular positioning groove (10).
4. filter tap according to claim 1, it is characterized in that, described stressed member comprises the adjustable lever (17) be arranged between baffle plate one (13) and diaphragm (5) and the Regulation spring (18) being sheathed on adjustable lever (17) lower end, the two ends of Regulation spring (18) lean respectively on baffle plate one (13) and adjustable lever (17), adjustable lever (17) upper end is stretched between positioning seat (9) and lower positioning seat (8), adjustable lever (17) upper end is fixed in the center of described diaphragm (5), described adjustable lever (17) lower end has the attachment hole (19) that internal diameter is greater than connecting rod (12) upper end external diameter, the upper end of described connecting rod (12) is stretched in the attachment hole (19) of adjustable lever (17) lower end.
5. filter tap according to claim 4, it is characterized in that, the center of described diaphragm (5) is sheathed on adjustable lever (17) upper end, described adjustable lever (17) upper end is also arranged with clamping panel (20) and lower clamping panel (21) and diaphragm (5) is positioned between clamping panel (20) and lower clamping panel (21), described adjustable lever (17) upper end has also been threaded locking nut (22), and described locking nut (22) is resisted against on clamping panel (20).
6. filter tap according to claim 2, is characterized in that, described upper positioning seat (9) sidepiece offers pilot port, and described pilot adapter (23) is threadedly connected to pilot port place.
7. filter tap according to claim 1, it is characterized in that, described valve body (1) lower end is opening-like and be fixed with base (24) at opening, the port of described valve body (1) lower end has gear edge, described baffle plate two (14) is positioned between gear edge and base (24), and described baffle plate one (13) leans with the inwall of valve body (1).
8. filter tap according to claim 7, it is characterized in that, described positioning hole two (16) runs through and is arranged on baffle plate two (14), the bottom of described base (24) has cavity, be provided with seal ring (25) between described base (24) and valve body (1) lower end, the place of bottom centre of described base (24) has been threaded blowdown valve (26).
9. filter tap according to claim 4, it is characterized in that, be provided with Returnning spring (27) between described adjustable lever (17) upper end and upper positioning seat (9), the two ends of described Returnning spring (27) are shunk respectively between locking nut (22) and upper positioning seat (9) inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310513714.8A CN103498963B (en) | 2013-10-25 | 2013-10-25 | A kind of filter tap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310513714.8A CN103498963B (en) | 2013-10-25 | 2013-10-25 | A kind of filter tap |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103498963A CN103498963A (en) | 2014-01-08 |
| CN103498963B true CN103498963B (en) | 2015-12-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310513714.8A Expired - Fee Related CN103498963B (en) | 2013-10-25 | 2013-10-25 | A kind of filter tap |
Country Status (1)
| Country | Link |
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| CN (1) | CN103498963B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106669263A (en) * | 2016-11-23 | 2017-05-17 | 盐城市星火阀业制造有限公司 | Pressurized strainer valve |
| CN110812919A (en) * | 2019-12-01 | 2020-02-21 | 郑水芝 | Backwashing device for sewage treatment equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599353Y (en) * | 2003-01-24 | 2004-01-14 | 北京阀门四厂 | Double-stage pressure regulator |
| CN2659521Y (en) * | 2003-11-20 | 2004-12-01 | 张明亮 | Self-cleaning water filtering valve |
| US7121191B1 (en) * | 2005-09-01 | 2006-10-17 | Haldex Brake Corporation | Air-operated brake actuator with control valve |
| CN201855609U (en) * | 2010-10-14 | 2011-06-08 | 湖南力合科技发展有限公司 | Spring type disc filter system |
| CN203549107U (en) * | 2013-10-25 | 2014-04-16 | 卓旦春 | Filtering valve |
-
2013
- 2013-10-25 CN CN201310513714.8A patent/CN103498963B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2599353Y (en) * | 2003-01-24 | 2004-01-14 | 北京阀门四厂 | Double-stage pressure regulator |
| CN2659521Y (en) * | 2003-11-20 | 2004-12-01 | 张明亮 | Self-cleaning water filtering valve |
| US7121191B1 (en) * | 2005-09-01 | 2006-10-17 | Haldex Brake Corporation | Air-operated brake actuator with control valve |
| CN201855609U (en) * | 2010-10-14 | 2011-06-08 | 湖南力合科技发展有限公司 | Spring type disc filter system |
| CN203549107U (en) * | 2013-10-25 | 2014-04-16 | 卓旦春 | Filtering valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103498963A (en) | 2014-01-08 |
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Granted publication date: 20151230 Termination date: 20181025 |