CN113007397A - Self-discharge type low-resistance backflow preventer - Google Patents
Self-discharge type low-resistance backflow preventer Download PDFInfo
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- CN113007397A CN113007397A CN202110136455.6A CN202110136455A CN113007397A CN 113007397 A CN113007397 A CN 113007397A CN 202110136455 A CN202110136455 A CN 202110136455A CN 113007397 A CN113007397 A CN 113007397A
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- backflow preventer
- filter screen
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- wall
- self
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- 239000000463 material Substances 0.000 claims abstract description 11
- 238000003825 pressing Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000005096 rolling process Methods 0.000 claims description 5
- 238000007790 scraping Methods 0.000 claims description 5
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 210000002421 cell wall Anatomy 0.000 claims description 3
- 238000013022 venting Methods 0.000 claims 1
- 238000007599 discharging Methods 0.000 abstract description 20
- 239000012535 impurity Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 210000000476 body water Anatomy 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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
-
- 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
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention relates to the technical field of backflow preventers, and discloses a self-discharging type low-resistance backflow preventer, which comprises a backflow preventer and a filter screen, wherein the filter screen is positioned inside the backflow preventer, the filter screen is fixedly connected with the right side of the inner surface of the backflow preventer, a through groove is formed in the bottom of the inner surface of the backflow preventer and is positioned on the right side below the filter screen, the upper end of the through groove is in a conical shape, a discharging pipe is fixedly sleeved at the lower end of the wall of the through groove, the lower end of the pipe wall of the discharging pipe penetrates through the backflow preventer and extends to the outside, a material receiving box is sleeved at the lower end of the pipe wall of the discharging pipe in a sliding mode, two slots are formed in two sides of the lower end of the pipe wall of the discharging pipe. This from letting out formula low resistance backflow preventer can carry out convenient clearance to the inside filter screen that is equipped with of backflow preventer, prevents that impurity from excessively causing the jam of filter screen.
Description
Technical Field
The invention relates to the technical field of backflow preventers, in particular to a self-discharge type low-resistance backflow preventer.
Background
The backflow preventer is a hydraulic control combination device which strictly limits the unidirectional flow of water in a pipeline, and has the function of preventing media in the pipeline from flowing backwards under any working condition so as to achieve the purpose of avoiding backflow pollution.
Wherein patent number is CN101852302B discloses a low resistance is from letting out formula backflow preventer, current backflow preventer job stabilization is solved to this backflow preventer, the security performance is poor, energy loss is big, the problem of structure complicacy, comprising a valve body, the setting is at the valve gap of valve body water inlet one end, its valve body middle part is equipped with the outlet, valve body core at the outlet position is equipped with the sleeve, the sleeve is equipped with circular sword limit and spring holder towards the one end of valve body water inlet, be equipped with the third spring between the internal diameter of sleeve external diameter and valve body, the valve gap core is equipped with first check valve, the one end and the sleeve cooperation of first check valve, the sleeve is equipped with the second check valve towards the one end of valve body delivery port, nevertheless this backflow preventer has certain defect when using:
this backflow preventer is inside to be equipped with the filter screen when using and is used for filtering flowing medium, but filter screen filter time is certain back, and the filter screen surface can attach to more impurity, can make the filter screen take place to block up under the condition that can not obtain timely processing to influenced the flow of medium, reduced backflow preventer's result of use.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the self-discharge type low-resistance backflow preventer, which has the advantages that the filter screen arranged in the backflow preventer can be conveniently cleaned, the filter screen is prevented from being blocked due to excessive impurities, and the medium flows more smoothly, so that the problem that the flow of the medium is influenced because more impurities are attached to the surface of the filter screen after the filter screen is filtered for a certain time and the filter screen is blocked under the condition that the impurities cannot be timely treated is solved.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a self-discharging type low-resistance backflow preventer comprises a backflow preventer and a filter screen, wherein the filter screen is positioned inside the backflow preventer, the filter screen is fixedly connected with the right side of the inner surface of the backflow preventer, a through groove is formed in the bottom of the inner surface of the backflow preventer and positioned on the right side of the lower part of the filter screen, the upper end of the through groove is in a conical arrangement, a discharging pipe is fixedly sleeved at the lower end of the groove wall of the through groove, the lower end of the pipe wall of the discharging pipe penetrates through the backflow preventer and extends to the outside, a material receiving box is slidably sleeved at the lower end of the pipe wall of the discharging pipe, two slots are formed in two sides of the lower end of the pipe wall of the discharging pipe, the two slots are positioned on the same horizontal line and are in a symmetrical arrangement, the two slots are connected with the top of the material receiving box through, two the equal contact of internal surface in spacing hole is connected with the stopper, two the stopper is close to one side mutually and passes spacing hole to the fixed connecting rod that is equipped with, two be equipped with the riser between the connecting rod, the cavity has been seted up to the inside of riser, two the connecting rod is close to one end mutually and all passes the both ends of riser to inside extending to the cavity, two the connecting rod is close to one end mutually and is located the cavity inside and connects through pressing mechanism, the fixed turning block that is equipped with in left side of riser, the turning block is cylindrical setting, the fixed scraper blade that is equipped with two symmetries setting in left side of turning block, two the scraper blade is the arc setting, two one side that the riser was kept away from to the scraper blade all is connected with the right side contact of filter screen.
Preferably, pressing means includes connecting block, telescopic link and the spring that two symmetries set up, two the connecting block is with two one end fixed connection is kept away from mutually to the connecting rod, and all is connected with the internal surface contact of cavity, the fixed block that is equipped with of internal surface intermediate position of cavity, two telescopic link and spring are located the both sides of fixed block respectively, and cup joint each other, the both ends of telescopic link and spring are close to one side fixed connection with fixed block and connecting block respectively mutually.
Preferably, slewing mechanism includes montant, first bevel gear and second bevel gear, first bevel gear cup joints with the lateral wall of turning block is fixed, the pole wall upper end of montant is rotated through first rolling bearing and the top of refluence preventer and is connected, the pole wall lower extreme of montant just is located the inside fixed cup joint with second bevel gear of refluence preventer, first bevel gear and second bevel gear meshing.
Preferably, fixture includes the fixed plate that two symmetries set up, two the fixed plate with connect the top both ends fixed connection of workbin, two all rotate through the second rolling bearing between the fixed plate and be connected with two-way lead screw, the equal threaded connection in pole wall both ends of two-way lead screw has the slider, two the bottom of slider all is connected with the top contact that connects the workbin, two the front side of slider all is fixed and is equipped with the L shaped plate, two the other end of L shaped plate respectively with two the cell wall contact of slot is connected, the right-hand member of two-way lead screw passes the right side the fixed plate extends to the outside.
Preferably, the upper end of the vertical rod and the right end of the bidirectional screw rod are respectively and fixedly provided with a first knob and a second knob.
Preferably, the right side both ends of riser have all been seted up the bar and have been led to the groove, two the right side of connecting block is all fixed to be equipped with and presses the depression bar, two the right-hand member of pressing the depression bar passes two bars respectively and leads to the groove and extend to the outside of backflow preventer.
Preferably, the lower end of the right side of the material receiving box is communicated with an impurity removing pipe, and a discharge valve is fixedly sleeved on the pipe wall of the impurity removing pipe.
(III) advantageous effects
Compared with the prior art, the invention provides a self-leakage type low-resistance backflow preventer, which has the following beneficial effects:
1. this from low resistance backflow preventer of discharge formula leads to the groove, presses down lever, turning block, scraper blade, slewing mechanism and pressing mechanism through stopper, connecting rod, riser, the bar that is equipped with, can scrape the impurity on filter screen surface and get rid of, prevents that the filter screen from receiving adhering to of impurity and leading to blockking up.
2. This from low resistance backflow preventer of discharge formula, through discharging pipe, logical groove, the case that connects and fixture that are equipped with, can carry out the collection concentrated to the impurity that strikes off the clearance to can carry out subsequent centralized processing.
Drawings
FIG. 1 is a schematic view of a self-releasing type low resistance backflow preventer according to the present invention;
FIG. 2 is an enlarged view of a portion A of FIG. 1;
FIG. 3 is an enlarged view of a portion B of FIG. 1;
fig. 4 is a structural enlarged view of a portion C of fig. 1.
In the figure: the device comprises a cooling tower body 1, a fan 2, a water distributor 3, a ventilating pipe 4, a filter screen 5, a cover plate 6, a rotating shaft 7, a fixing block 8, a clamping block 9, a spring 10, a positioning block 11, a fixed pulley 12, a sliding rod 13, a 14U-shaped placing plate, a sliding block 15, a rope 16, a baffle 17, a bolt 18, a sealing ring 19, a damping layer 20 and a pressing block 21.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a self-discharging type low resistance backflow preventer comprises a backflow preventer 1 and a filter screen 2, wherein the filter screen 2 is positioned inside the backflow preventer 1, the filter screen 2 is fixedly connected with the right side of the inner surface of the backflow preventer 1, a through groove is formed in the bottom of the inner surface of the backflow preventer 1 and the right side of the lower part of the filter screen 2, the upper end of the through groove is in a conical shape, a discharging pipe 3 is fixedly sleeved at the lower end of the wall of the through groove, the lower end of the pipe wall of the discharging pipe 3 passes through the backflow preventer 1 and extends to the outside, a material receiving box 4 is slidably sleeved at the lower end of the pipe wall of the discharging pipe 3, two slots are formed in both sides of the lower end of the pipe wall of the discharging pipe 3, the two slots are positioned on the same horizontal line and are symmetrically arranged, the two slots are connected with the top of the material, the equal contact of internal surface in two spacing holes is connected with stopper 5, two stopper 5 are close to one side mutually and pass spacing hole, and fixed connecting rod 6 that is equipped with, be equipped with riser 7 between two connecting rod 6, the cavity has been seted up to riser 7's inside, two connecting rod 6 are close to one end mutually and all pass riser 7's both ends, and extend to inside the cavity, two connecting rod 6 are close to one end mutually and are located the cavity inside and connect through pressing mechanism, the fixed turning block 8 that is equipped with in left side of riser 7, turning block 8 is cylindrical setting, the fixed scraper blade 9 that is equipped with two symmetries and sets up in left side of turning block 8, two scraper blades 9 are the arc setting, one side that riser 7 was kept away from to two scraper blades 9 all is connected with the right side contact of filter screen 2, thereby can carry out quick striking off to.
Pressing means includes connecting block 10 that two symmetries set up, telescopic link 11 and spring 12, one end fixed connection is kept away from mutually with two connecting rods 6 to two connecting blocks 10, and all be connected with the internal surface contact of cavity, the fixed block 13 that is equipped with of internal surface intermediate position of cavity, two telescopic links 11 and spring 12 are located the both sides of fixed block 13 respectively, and cup joint each other, telescopic link 11 and spring 12's both ends are close to one side fixed connection with fixed block 13 and connecting block 10 respectively mutually.
The rotating mechanism comprises a vertical rod 14, a first bevel gear 15 and a second bevel gear 16, the first bevel gear 15 is fixedly sleeved with the outer side wall of the rotating block 8, the upper end of the rod wall of the vertical rod 14 is rotatably connected with the top of the backflow preventer 1 through a first rotating bearing, the lower end of the rod wall of the vertical rod 14 is fixedly sleeved with the second bevel gear 16 and is positioned inside the backflow preventer 1, and the first bevel gear 15 is meshed with the second bevel gear 16.
Fixture includes the fixed plate 17 that two symmetries set up, two fixed plates 17 and the top both ends fixed connection who connects workbin 4, all be connected with two-way lead screw 18 through the second rolling bearing rotation between two fixed plates 17, the equal threaded connection in pole wall both ends of two-way lead screw 18 has slider 19, the bottom of two slider 19 all is connected with the top contact that connects workbin 4, thereby it is spacing to the removal of slider 19, the equal fixed L shaped plate 20 that is equipped with in front side of two slider 19, the other end of two L shaped plates 20 is connected with the cell wall contact of two slots respectively, the right-hand member of two-way lead screw 18 passes right side fixed plate 17 and extends to the outside.
The upper end of the vertical rod 14 and the right end of the bidirectional screw rod 18 are respectively and fixedly provided with a first knob 21 and a second knob 22, so that the vertical rod 14 and the bidirectional screw rod 18 can be conveniently rotated.
The groove is led to the bar has all been seted up at the right side both ends of riser 7, and the right side of two connecting blocks 10 is all fixed to be equipped with and presses down pole 23, and two right-hand members that press down pole 23 pass two bars respectively and lead to the groove and extend to the outside of backflow preventer 1, are convenient for take out scraper blade 9 and riser 7 from backflow preventer 1 is inside.
Connect the right side lower extreme intercommunication of workbin 4 to be equipped with edulcoration pipe 24, the fixed bleeder valve 25 that has cup jointed of pipe wall of edulcoration pipe 24 guarantees that impurity can obtain concentrated processing.
In conclusion, when the self-release type low-resistance backflow preventer is used, two pressing rods are pressed, two connecting blocks drive a connecting rod and a limiting block to be close to each other, a telescopic rod and a spring are compressed, two scraping plates are rotated to the horizontal direction, two scraping plates and a vertical plate are inserted into the backflow preventer from the right side of the backflow preventer, a first bevel gear and a second bevel gear are meshed, the two pressing rods are loosened, the two connecting blocks are returned to the initial positions through elastic return of the telescopic rod and the spring, the limiting block is pushed by the two connecting rods to be in contact with the hole wall of a limiting hole, the position of the vertical plate is determined, a material receiving box is in sliding sleeve joint with a material discharging pipe, a second knob is rotated, the second knob drives a two-way screw rod to rotate, two sliding blocks on the rod wall of the two-way screw rod drive an L-shaped plate to be inserted into two slots when the two-way screw rod rotates, thereby the butt joint workbin is connected with the discharging pipe, rotatable first knob this moment, make first knob pivoted while second bevel gear drive first bevel gear and rotate, make the scraper blade scrape the filter screen and move the contact, scrape the impurity on filter screen surface and fall, and impurity falls to leading to inslot portion through self gravity, and flow to the material receiving box through the discharging pipe in, will connect workbin and discharging pipe separation after the definite time, and open edulcoration pipe and bleeder valve, with inside impurity get rid of can.
It is to be noted that the term "comprises," "comprising," or any other variation thereof is intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a from low resistance backflow preventer of let out formula, includes backflow preventer (1) and filter screen (2), its characterized in that: the filter screen (2) is located inside the backflow preventer (1), the filter screen (2) is fixedly connected with the right side of the inner surface of the backflow preventer (1), the bottom of the inner surface of the backflow preventer (1) is positioned on the right side of the lower part of the filter screen (2) and is provided with a through groove, the upper end of the through groove is in a conical shape, a discharge pipe (3) is fixedly sleeved at the lower end of the groove wall of the through groove, the lower end of the pipe wall of the discharge pipe (3) penetrates through the backflow preventer (1) and extends to the outside, a material receiving box (4) is sleeved at the lower end of the pipe wall of the discharge pipe (3) in a sliding manner, two slots are formed in both sides of the lower end of the pipe wall of the discharge pipe (3), the two slots are located on the same horizontal line and are symmetrically arranged, the two slots are connected with the top of the material, and the right side of the filter screen (2) is provided with a limiting hole, the inner surfaces of the two limiting holes are in contact connection with limiting blocks (5), the two limiting blocks (5) are close to one side and penetrate through the limiting hole, connecting rods (6) are fixedly arranged, a vertical plate (7) is arranged between the two connecting rods (6), the interior of the vertical plate (7) is provided with a cavity, the two connecting rods (6) are close to one end and penetrate through the two ends of the vertical plate (7) and extend into the cavity, the two connecting rods (6) are close to one end and are positioned in the cavity and are connected through a pressing mechanism, the left side of the vertical plate (7) is fixedly provided with a rotating block (8), the rotating block (8) is in a cylindrical arrangement, the left side of the rotating block (8) is fixedly provided with two symmetrically arranged scraping plates (9), the two scraping plates (9) are in an arc arrangement, one side of the two scraping plates (9) far away from the vertical plate (7, the outer side wall of the rotating block (8) is sleeved with a rotating mechanism.
2. A self-releasing low resistance backflow preventer as claimed in claim 1, wherein: pressing means includes connecting block (10), telescopic link (11) and spring (12), two that two symmetries set up connecting block (10) and two one end fixed connection is kept away from mutually in connecting rod (6), and all is connected with the internal surface contact of cavity, the fixed block (13) that is equipped with of internal surface intermediate position of cavity, two telescopic link (11) and spring (12) are located the both sides of fixed block (13) respectively, and cup joint each other, the both ends of telescopic link (11) and spring (12) are close to one side fixed connection with fixed block (13) and connecting block (10) respectively mutually.
3. A self-releasing low resistance backflow preventer as claimed in claim 1, wherein: slewing mechanism includes montant (14), first bevel gear (15) and second bevel gear (16), first bevel gear (15) and the fixed cover of lateral wall of turning block (8) are cup jointed, the pole wall upper end of montant (14) is rotated through first rolling bearing and the top of refluence preventer (1) and is connected, the pole wall lower extreme of montant (14) just is located the inside fixed cover of refluence preventer (1) and second bevel gear (16), first bevel gear (15) and second bevel gear (16) meshing.
4. A self-releasing low resistance backflow preventer as claimed in claim 1, wherein: fixture includes fixed plate (17) that two symmetries set up, two fixed plate (17) and the top both ends fixed connection who connects workbin (4), two all be connected with two-way lead screw (18) through the rotation of second rolling bearing between fixed plate (17), the equal threaded connection in pole wall both ends of two-way lead screw (18) has slider (19), two the bottom of slider (19) all is connected with the top contact that connects workbin (4), two the front side of slider (19) all is fixed and is equipped with L shaped plate (20), two the other end of L shaped plate (20) respectively with two the cell wall contact of slot is connected, the right-hand member of two-way lead screw (18) passes the right side fixed plate (17) extends to the outside.
5. A self-venting low drag backflow preventer as claimed in claim 3, wherein: the upper end of the vertical rod (14) and the right end of the bidirectional screw rod (18) are respectively and fixedly provided with a first knob (21) and a second knob (22).
6. A self-releasing low resistance backflow preventer as claimed in claim 2, wherein: the bar is led to the groove, two all has been seted up at the right side both ends of riser (7) the right side of connecting block (10) is all fixed to be equipped with and presses down depression bar (23), two the right-hand member of pressing down depression bar (23) passes two bars respectively and leads to the groove and extends to the outside of refluence preventer (1).
7. A self-releasing low resistance backflow preventer as claimed in claim 1, wherein: connect the right side lower extreme intercommunication of workbin (4) to be equipped with edulcoration pipe (24), the fixed bleeder valve (25) that has cup jointed of pipe wall of edulcoration pipe (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110136455.6A CN113007397A (en) | 2021-02-01 | 2021-02-01 | Self-discharge type low-resistance backflow preventer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110136455.6A CN113007397A (en) | 2021-02-01 | 2021-02-01 | Self-discharge type low-resistance backflow preventer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113007397A true CN113007397A (en) | 2021-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110136455.6A Pending CN113007397A (en) | 2021-02-01 | 2021-02-01 | Self-discharge type low-resistance backflow preventer |
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| Country | Link |
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| CN (1) | CN113007397A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249425A (en) * | 2021-12-28 | 2022-03-29 | 刘亮 | Constructed wetland denitrification sewage treatment device and sewage treatment method |
| CN115177989A (en) * | 2022-06-24 | 2022-10-14 | 安徽荣达阀门有限公司 | Pressure-reducing piston type backflow preventer |
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| CN101852302A (en) * | 2010-05-24 | 2010-10-06 | 杭州春江阀门有限公司 | Low-resistance self-discharge backflow preventer |
| CN107774640A (en) * | 2017-10-30 | 2018-03-09 | 湖南望隆企业管理咨询有限公司 | A kind of test tube cleaning device |
| CN209696384U (en) * | 2019-01-18 | 2019-11-29 | 刘波秋 | Hydraulic and hydroelectric engineering multi-functional lobby water sieve |
| CN209960463U (en) * | 2019-04-23 | 2020-01-17 | 胡凤玺 | Feed water flow control system of feed pump steam turbine of thermal power plant |
| CN210495458U (en) * | 2019-08-25 | 2020-05-12 | 南昌市湾里自来水有限责任公司 | Filter screen for water treatment convenient to dismantle |
| CN211724851U (en) * | 2019-12-30 | 2020-10-23 | 佛山市秀峰制冷设备有限公司 | Red copper filter that filtration efficiency is high |
| CN211978000U (en) * | 2020-06-23 | 2020-11-20 | 唐成江 | Runoff flow monitoring device for water conservation |
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2021
- 2021-02-01 CN CN202110136455.6A patent/CN113007397A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101852302A (en) * | 2010-05-24 | 2010-10-06 | 杭州春江阀门有限公司 | Low-resistance self-discharge backflow preventer |
| CN107774640A (en) * | 2017-10-30 | 2018-03-09 | 湖南望隆企业管理咨询有限公司 | A kind of test tube cleaning device |
| CN209696384U (en) * | 2019-01-18 | 2019-11-29 | 刘波秋 | Hydraulic and hydroelectric engineering multi-functional lobby water sieve |
| CN209960463U (en) * | 2019-04-23 | 2020-01-17 | 胡凤玺 | Feed water flow control system of feed pump steam turbine of thermal power plant |
| CN210495458U (en) * | 2019-08-25 | 2020-05-12 | 南昌市湾里自来水有限责任公司 | Filter screen for water treatment convenient to dismantle |
| CN211724851U (en) * | 2019-12-30 | 2020-10-23 | 佛山市秀峰制冷设备有限公司 | Red copper filter that filtration efficiency is high |
| CN211978000U (en) * | 2020-06-23 | 2020-11-20 | 唐成江 | Runoff flow monitoring device for water conservation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114249425A (en) * | 2021-12-28 | 2022-03-29 | 刘亮 | Constructed wetland denitrification sewage treatment device and sewage treatment method |
| CN115177989A (en) * | 2022-06-24 | 2022-10-14 | 安徽荣达阀门有限公司 | Pressure-reducing piston type backflow preventer |
| CN115177989B (en) * | 2022-06-24 | 2024-06-25 | 安徽荣达阀门有限公司 | Decompression piston type backflow preventer |
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