CN114352775A - Double-side guiding check valve - Google Patents
Double-side guiding check valve Download PDFInfo
- Publication number
- CN114352775A CN114352775A CN202210250092.3A CN202210250092A CN114352775A CN 114352775 A CN114352775 A CN 114352775A CN 202210250092 A CN202210250092 A CN 202210250092A CN 114352775 A CN114352775 A CN 114352775A
- Authority
- CN
- China
- Prior art keywords
- oil
- pipe
- check valve
- double
- wall
- 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.)
- Pending
Links
- 238000006243 chemical reaction Methods 0.000 claims description 26
- 238000007790 scraping Methods 0.000 claims description 7
- 239000012535 impurity Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Images
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
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/06—Check valves with guided rigid valve members with guided stems
- F16K15/063—Check valves with guided rigid valve members with guided stems the valve being loaded by a spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
- B01D29/03—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements self-supporting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
-
- 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
-
- 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
- F16K27/0209—Check valves or pivoted valves
Abstract
The invention belongs to the technical field of check valves, in particular to a double-sided guide check valve, which aims at the problem that the existing check valve has a single structure when in use, only can play the role of a valve, and impurities in the valve are easy to silt up due to long-time use, so that the blockage phenomenon is caused. The invention has simple operation and convenient use, can prevent the backflow of oil, can filter the oil passing through and clean the filtered impurities.
Description
Technical Field
The invention relates to the technical field of check valves, in particular to a double-sided guide check valve.
Background
The check valve is mainly used for preventing media from flowing backwards and preventing a pump and a driving motor from reversing in a pipeline system, and is widely applied, particularly, the check valve is a valve frequently used in the petroleum industry.
The existing check valve has a single structure when in use, can only play the role of a valve, and can easily cause the deposition of impurities in the valve and the blockage phenomenon after long-time use.
Disclosure of Invention
The invention aims to solve the defects that the existing check valve has a single structure and can only play the role of a valve when in use, and impurities in the valve are easy to deposit and cause blockage after long-time use, and the double-sided guide check valve is provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
two-sided direction single current valve, including advancing oil pipe and going out oil pipe, advance oil pipe and go out oil pipe between be equipped with the conversion box, go out oil pipe and conversion box fixed connection, the bottom threaded connection of conversion box has the collection box, collects the box and advances oil pipe and be connected, fixed mounting has the connecting pipe on the bottom inner wall of collection box, the connecting pipe with advance oil pipe threaded connection, fixed mounting has the fixing base on the inner wall of conversion box, is equipped with on the fixing base and leads the oilhole, it leads oily mechanism to be equipped with in the oilhole to lead, the bottom fixed mounting of fixing base has the wedge baffle, fixed mounting has the filter on the inner wall of conversion box, be equipped with on the wedge baffle and scrape the material mechanism, scrape material mechanism and filter and mutually support.
Preferably, lead oily mechanism including leading oil pipe, lead oil pipe and the inner wall sliding connection who leads the oilhole, lead the through-hole of seting up two symmetry settings on the oil pipe, the through-hole is mutually supported with leading the oilhole, fixed mounting has the locating lever on the inner wall of conversion box, sliding connection has the ejector pin on the locating lever, the bottom fixed mounting of two ejector pins has same push pedal, the push pedal with lead oil pipe fixed connection, the top fixed mounting of push pedal has the supporting spring that two symmetries set up, supporting spring's top and locating lever fixed connection, and the top fixed mounting of ejector pin has the baffle, lead and all seted up the spacing groove on the both sides inner wall of oilhole, sliding connection has the stopper in the spacing groove, stopper and the corresponding oil pipe fixed connection that leads, supporting spring is at the effect roof pressure push pedal of locating lever, make the push pedal block up leading the oilhole, prevent the backward flow.
Preferably, the scraper mechanism includes the scraper blade, the inboard fixed mounting of wedge baffle has the dead lever, it has the pivot to rotate on the dead lever, the bottom sliding connection of pivot has the connecting rod, scraper blade and connecting rod fixed connection, and scraper blade and filter are mutually supported, the top fixed mounting of pivot has the propeller, the propeller is mutually supported with the wedge baffle, the sliding tray has been seted up on the top of connecting rod, sliding tray and pivot sliding connection, the movable groove has all been seted up to the both sides of pivot, sliding connection has the locating piece on the inner wall of movable groove, the bottom fixed mounting of locating piece has the top spring, the bottom of top spring and the bottom inner wall fixed connection of movable groove, the fluid that advances oil pipe and get into increases the velocity of flow of fluid under the effect of wedge baffle, thereby drive the pivot through the effect with the propeller and rotate, and then drive the scraper blade and scrape the material to the filter.
Compared with the prior art, the invention has the advantages that:
(1) according to the scheme, the wedge-shaped guide plate and the oil guide hole are arranged to act, so that the flow speed and impact force of oil can be increased, and the oil can be quickly led out through the oil guide hole;
(2) because the through hole is matched with the oil guide hole, and the top spring and the push plate act on the oil guide pipe, oil liquid flows when oil is fed from bottom to top in the conversion box, and the oil guide hole can be sealed by the push plate when oil flows back;
(3) because the mutually supporting of propeller and wedge baffle, and the mutually supporting of scraper blade and filter for fluid that flows is with higher speed when passing through the wedge baffle through the flow, thereby can drive the pivot and rotate, and then drives the impurity of scraper blade on to the filter through the connecting rod and cleans.
The invention has simple operation and convenient use, can prevent the backflow of oil, can filter the oil passing through and clean the filtered impurities.
Drawings
Fig. 1 is a schematic structural diagram of a double-sided pilot check valve according to the present invention;
FIG. 2 is a schematic view of a three-dimensional structure of an oil conduit of the double-sided guide check valve provided by the invention;
FIG. 3 is a schematic perspective view of a rotating shaft and a propeller of the double-sided pilot check valve according to the present invention;
FIG. 4 is a schematic structural diagram of part A of a double-sided pilot check valve according to the present invention;
fig. 5 is a schematic structural diagram of part B of the double-sided pilot check valve according to the present invention.
In the figure: 1. an oil inlet pipe; 2. a switch box; 3. an oil outlet pipe; 4. a collection box; 5. a connecting pipe; 6. a fixed seat; 7. an oil guide hole; 8. an oil guide pipe; 9. a through hole; 10. a limiting groove; 11. a limiting block; 12. pushing the plate; 13. positioning a rod; 14. a top rod; 15. a support spring; 16. a baffle plate; 17. a wedge-shaped guide plate; 18. fixing the rod; 19. a filter plate; 20. a rotating shaft; 21. a propeller; 22. a squeegee; 23. a sliding groove; 24. a movable groove; 25. positioning blocks; 26. a spring is supported; 27. a connecting rod; 29. a wedge-shaped groove; 30. and (7) a rubber pad.
Detailed Description
The technical solutions in the embodiments will be described clearly and completely with reference to the drawings in the embodiments, and it is obvious that the described embodiments are only a part of the embodiments, but not all embodiments.
Example one
Referring to fig. 1-5, two-sided direction single current valve, including advancing oil pipe 1 and going out oil pipe 3, it is equipped with conversion box 2 to advance between oil pipe 1 and the play oil pipe 3, go out oil pipe 3 and conversion box 2 fixed connection, the bottom threaded connection of conversion box 2 has collection box 4, it is connected with advancing oil pipe 1 to collect box 4, fixed mounting has connecting pipe 5 on the bottom inner wall of collection box 4, connecting pipe 5 and advancing oil pipe 1 threaded connection, fixed mounting has fixing base 6 on the inner wall of conversion box 2, be equipped with on the fixing base 6 and lead oilhole 7, be equipped with in leading the oilhole 7 and lead oily mechanism, the bottom fixed mounting of fixing base 6 has wedge baffle 17, fixed mounting has filter 19 on the inner wall of conversion box 2, be equipped with on the wedge baffle 17 and scrape the material mechanism, scrape material mechanism and mutually support with filter 19.
In the embodiment, the oil guiding mechanism comprises an oil guiding pipe 8, the oil guiding pipe 8 is slidably connected with the inner wall of the oil guiding hole 7, two through holes 9 symmetrically arranged are formed in the oil guiding pipe 8, the through holes 9 are matched with the oil guiding hole 7, a positioning rod 13 is fixedly installed on the inner wall of the conversion box 2, ejector rods 14 are slidably connected with the positioning rod 13, the bottom ends of the two ejector rods 14 are fixedly provided with the same push plate 12, the push plate 12 is fixedly connected with the oil guiding pipe 8, the top of the push plate 12 is fixedly provided with two symmetrically arranged supporting springs 15, the top ends of the supporting springs 15 are fixedly connected with the positioning rod 13, the top end of the ejector rod 14 is fixedly provided with a baffle 16, the inner walls of the two sides of the oil guiding hole 7 are respectively provided with a limiting groove 10, a limiting block 11 is slidably connected with the limiting groove 10, the limiting block 11 is fixedly connected with the corresponding oil guiding pipe 8, the supporting springs 15 press the push plate 12 under the action of the positioning rod 13, so that the push plate 12 blocks the oil guide hole 7 to prevent backflow.
In this embodiment, the scraping mechanism includes a scraper 22, a fixing rod 18 is fixedly installed on the inner side of the wedge-shaped guide plate 17, a rotating shaft 20 is rotatably connected to the fixing rod 18, a connecting rod 27 is slidably connected to the bottom end of the rotating shaft 20, the scraper 22 is fixedly connected to the connecting rod 27, the scraper 22 is matched with the filter plate 19, a propeller 21 is fixedly installed on the top end of the rotating shaft 20, the propeller 21 is matched with the wedge-shaped guide plate 17, a sliding groove 23 is formed in the top end of the connecting rod 27, the sliding groove 23 is slidably connected to the rotating shaft 20, movable grooves 24 are formed in both sides of the rotating shaft 20, a positioning block 25 is slidably connected to the inner wall of the movable groove 24, a top spring 26 is fixedly installed on the bottom of the positioning block 25, the bottom end of the top spring 26 is fixedly connected to the inner wall of the bottom of the movable groove 24, the oil entering from the oil inlet pipe 1 increases the flow velocity of the oil under the action of the wedge-shaped guide plate 17, thereby driving the rotating shaft 20 to rotate under the action of the propeller 21, thereby driving the scraper 22 to scrape the filter plate 19.
The working principle is that when in work, oil enters the conversion box 2 through the oil inlet pipe 1, the oil is filtered under the action of the filter plate 19, meanwhile, when the oil enters the wedge-shaped guide plate 17, the flow of the oil is reduced under the action of the wedge surface of the wedge-shaped guide plate 17, the flow speed of the oil is increased, the oil guide pipe 8 is pushed under the impact force of the oil, so that the supporting spring 15 is driven by the push plate 12 to be compressed, meanwhile, the oil guide pipe 8 drives the through hole 9 to move out of the oil guide hole 7, thereby derive fluid to discharge through oil pipe 3, fluid that flows simultaneously drives propeller 21 through mutually supporting with propeller 21, and pivoted propeller 21 drives connecting rod 27 through pivot 20 and rotates, and pivoted connecting rod 27 drives scraper blade 22 and filters the impurity of coming out on to filter 19 and cleans, and collects through collecting box 4.
Example two
Referring to fig. 1-5, a double-sided guiding check valve comprises an oil inlet pipe 1 and an oil outlet pipe 3, a conversion box 2 is arranged between the oil inlet pipe 1 and the oil outlet pipe 3, the oil outlet pipe 3 is fixedly connected with the conversion box 2, the bottom of the conversion box 2 is in threaded connection with a collection box 4, the collection box 4 is connected with the oil inlet pipe 1, the inner wall of the bottom of the collection box 4 is fixedly provided with a connection pipe 5, the connection pipe 5 is in threaded connection with the oil inlet pipe 1, the inner wall of the conversion box 2 is fixedly provided with a fixed seat 6, the fixed seat 6 is provided with an oil guide hole 7, the oil guide hole 7 is internally provided with an oil guide mechanism, the bottom of the fixed seat 6 is fixedly provided with a wedge-shaped guide plate 17, the inner wall of the conversion box 2 is fixedly provided with a filter plate 19, the wedge-shaped guide plate 17 is provided with a scraping mechanism, the scraping mechanism is matched with the filter plate 19, the top of the fixed seat 6 is provided with a wedge-shaped groove 29, and the wedge-shaped groove 29 is communicated with the oil guide hole 7, and a rubber pad 30 is fixedly arranged at the bottom of the push plate 12, and the rubber pad 30 is matched with the wedge-shaped groove 29.
In the embodiment, the oil guiding mechanism comprises an oil guiding pipe 8, the oil guiding pipe 8 is slidably connected with the inner wall of the oil guiding hole 7, two through holes 9 symmetrically arranged are formed in the oil guiding pipe 8, the through holes 9 are matched with the oil guiding hole 7, a positioning rod 13 is fixedly installed on the inner wall of the conversion box 2, ejector rods 14 are slidably connected with the positioning rod 13, the bottom ends of the two ejector rods 14 are fixedly provided with the same push plate 12, the push plate 12 is fixedly connected with the oil guiding pipe 8, the top of the push plate 12 is fixedly provided with two symmetrically arranged supporting springs 15, the top ends of the supporting springs 15 are fixedly connected with the positioning rod 13, the top end of the ejector rod 14 is fixedly provided with a baffle 16, the inner walls of the two sides of the oil guiding hole 7 are respectively provided with a limiting groove 10, a limiting block 11 is slidably connected with the limiting groove 10, the limiting block 11 is fixedly connected with the corresponding oil guiding pipe 8, the supporting springs 15 press the push plate 12 under the action of the positioning rod 13, so that the push plate 12 blocks the oil guide hole 7 to prevent backflow.
In this embodiment, the scraping mechanism includes a scraper 22, a fixing rod 18 is fixedly installed on the inner side of the wedge-shaped guide plate 17, a rotating shaft 20 is rotatably connected to the fixing rod 18, a connecting rod 27 is slidably connected to the bottom end of the rotating shaft 20, the scraper 22 is fixedly connected to the connecting rod 27, the scraper 22 is matched with the filter plate 19, a propeller 21 is fixedly installed on the top end of the rotating shaft 20, the propeller 21 is matched with the wedge-shaped guide plate 17, a sliding groove 23 is formed in the top end of the connecting rod 27, the sliding groove 23 is slidably connected to the rotating shaft 20, movable grooves 24 are formed in both sides of the rotating shaft 20, a positioning block 25 is slidably connected to the inner wall of the movable groove 24, a top spring 26 is fixedly installed on the bottom of the positioning block 25, the bottom end of the top spring 26 is fixedly connected to the inner wall of the bottom of the movable groove 24, the oil entering from the oil inlet pipe 1 increases the flow velocity of the oil under the action of the wedge-shaped guide plate 17, thereby driving the rotating shaft 20 to rotate under the action of the propeller 21, thereby driving the scraper 22 to scrape the filter plate 19.
The working principle of the second embodiment is different from that of the first embodiment in that the rubber pad 30 is matched with the wedge-shaped groove 29, so that the oil guide hole 7 can be sealed, and the oil can be prevented from flowing back.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the inventive concepts of the present invention in the technical scope of the present invention.
Claims (8)
1. The double-sided guiding check valve comprises an oil inlet pipe (1) and an oil outlet pipe (3), and is characterized in that a conversion box (2) is arranged between the oil inlet pipe (1) and the oil outlet pipe (3), the oil outlet pipe (3) is fixedly connected with the conversion box (2), the bottom of the conversion box (2) is in threaded connection with a collection box (4), the collection box (4) is connected with the oil inlet pipe (1), a connecting pipe (5) is fixedly installed on the inner wall of the bottom of the collection box (4), the connecting pipe (5) is in threaded connection with the oil inlet pipe (1), a fixing seat (6) is fixedly installed on the inner wall of the conversion box (2), an oil guide hole (7) is formed in the fixing seat (6), an oil guide mechanism is arranged in the oil guide hole (7), a wedge-shaped guide plate (17) is fixedly installed at the bottom of the fixing seat (6), and a filter plate (19) is fixedly installed on the inner wall of the conversion box (2), the wedge-shaped guide plate (17) is provided with a scraping mechanism, and the scraping mechanism is matched with the filter plate (19).
2. The double-sided guide check valve according to claim 1, wherein the oil guide mechanism comprises an oil guide pipe (8), the oil guide pipe (8) is slidably connected with the inner wall of the oil guide hole (7), two through holes (9) are symmetrically formed in the oil guide pipe (8), and the through holes (9) are matched with the oil guide hole (7).
3. The double-sided guide check valve as recited in claim 1, wherein the scraping mechanism comprises a scraper (22), a fixed rod (18) is fixedly installed on the inner side of the wedge-shaped guide plate (17), a rotating shaft (20) is rotatably connected to the fixed rod (18), a connecting rod (27) is slidably connected to the bottom end of the rotating shaft (20), the scraper (22) is fixedly connected to the connecting rod (27), and the scraper (22) is matched with the filter plate (19).
4. A double-sided pilot check valve as claimed in claim 3, wherein the top end of the rotating shaft (20) is fixedly mounted with a propeller (21), the propeller (21) is engaged with the wedge-shaped guide plate (17).
5. The double-sided guide check valve as claimed in claim 3, wherein a sliding groove (23) is formed at the top end of the connecting rod (27), the sliding groove (23) is slidably connected with the rotating shaft (20), movable grooves (24) are formed at both sides of the rotating shaft (20), a positioning block (25) is slidably connected to the inner wall of each movable groove (24), a top spring (26) is fixedly installed at the bottom of each positioning block (25), and the bottom end of each top spring (26) is fixedly connected with the inner wall of the bottom of each movable groove (24).
6. The double-sided guide check valve as claimed in claim 1, wherein a positioning rod (13) is fixedly mounted on the inner wall of the conversion box (2), a top rod (14) is slidably connected to the positioning rod (13), the bottom ends of the two top rods (14) are fixedly mounted with the same push plate (12), and the push plate (12) is fixedly connected to the oil guide pipe (8).
7. The double-sided guide check valve as claimed in claim 6, wherein two symmetrically arranged supporting springs (15) are fixedly installed at the top of the push plate (12), the top ends of the supporting springs (15) are fixedly connected with the positioning rod (13), and the top end of the push rod (14) is fixedly installed with a baffle (16).
8. The double-sided guide check valve as claimed in claim 1, wherein the inner walls of both sides of the oil guide hole (7) are respectively provided with a limiting groove (10), a limiting block (11) is slidably connected in the limiting groove (10), and the limiting block (11) is fixedly connected with the corresponding oil guide pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210250092.3A CN114352775A (en) | 2022-03-15 | 2022-03-15 | Double-side guiding check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210250092.3A CN114352775A (en) | 2022-03-15 | 2022-03-15 | Double-side guiding check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114352775A true CN114352775A (en) | 2022-04-15 |
Family
ID=81094408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210250092.3A Pending CN114352775A (en) | 2022-03-15 | 2022-03-15 | Double-side guiding check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114352775A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008014352A (en) * | 2006-07-04 | 2008-01-24 | Maezawa Kyuso Industries Co Ltd | Check valve unit and filtering and straightening vane |
| CN204164436U (en) * | 2014-09-26 | 2015-02-18 | 浙江振兴石化机械有限公司 | The one-way valve that a kind of anti-back flow is effective |
| CN110005848A (en) * | 2018-01-04 | 2019-07-12 | 四川峰哲精密设备有限公司 | One kind is from brush backpulsing filter device |
| CN209115735U (en) * | 2018-11-27 | 2019-07-16 | 盐城宏瑞石化机械有限公司 | A kind of check-valves with filter device |
| CN111173941A (en) * | 2020-01-08 | 2020-05-19 | 陈志勇 | Valve with sewage filtering function and filtering method thereof |
| CN111467855A (en) * | 2020-06-02 | 2020-07-31 | 宁波水治环保科技有限公司 | A anti-clogging device for domestic wastewater handles |
| CN211145474U (en) * | 2019-11-30 | 2020-07-31 | 河南工业职业技术学院 | Conveying pipeline for waste gas treatment |
| CN112031707A (en) * | 2020-08-28 | 2020-12-04 | 王芹芬 | Anti-eccentric downhole oil pipe check valve |
| CN112728169A (en) * | 2020-12-16 | 2021-04-30 | 陈忠菊 | Check valve with adjusting function |
-
2022
- 2022-03-15 CN CN202210250092.3A patent/CN114352775A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008014352A (en) * | 2006-07-04 | 2008-01-24 | Maezawa Kyuso Industries Co Ltd | Check valve unit and filtering and straightening vane |
| CN204164436U (en) * | 2014-09-26 | 2015-02-18 | 浙江振兴石化机械有限公司 | The one-way valve that a kind of anti-back flow is effective |
| CN110005848A (en) * | 2018-01-04 | 2019-07-12 | 四川峰哲精密设备有限公司 | One kind is from brush backpulsing filter device |
| CN209115735U (en) * | 2018-11-27 | 2019-07-16 | 盐城宏瑞石化机械有限公司 | A kind of check-valves with filter device |
| CN211145474U (en) * | 2019-11-30 | 2020-07-31 | 河南工业职业技术学院 | Conveying pipeline for waste gas treatment |
| CN111173941A (en) * | 2020-01-08 | 2020-05-19 | 陈志勇 | Valve with sewage filtering function and filtering method thereof |
| CN111467855A (en) * | 2020-06-02 | 2020-07-31 | 宁波水治环保科技有限公司 | A anti-clogging device for domestic wastewater handles |
| CN112031707A (en) * | 2020-08-28 | 2020-12-04 | 王芹芬 | Anti-eccentric downhole oil pipe check valve |
| CN112728169A (en) * | 2020-12-16 | 2021-04-30 | 陈忠菊 | Check valve with adjusting function |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220415 |