CN117489832A

CN117489832A - Pipeline backflow preventer and method thereof

Info

Publication number: CN117489832A
Application number: CN202311396130.7A
Authority: CN
Inventors: 魏代刚; 孙倩
Original assignee: Weilong Valve Co ltd
Current assignee: Weilong Valve Co ltd
Priority date: 2023-10-26
Filing date: 2023-10-26
Publication date: 2024-02-02

Abstract

The invention discloses a pipeline backflow preventer and a method thereof, wherein the pipeline backflow preventer comprises a preventer main body, the preventer main body is provided with a water inlet cavity and a water discharge cavity, a first valve and a second valve which can move back and forth are arranged in the preventer main body, a rotatable adjusting ring plate is arranged on the inner wall of the input end of the water discharge cavity, a plurality of telescopic cleaning mechanisms are arranged on the outer side of the adjusting ring plate, each cleaning mechanism comprises a first adjusting plate and a second adjusting plate, the first adjusting plate and the second valve synchronously move back and forth, a first cleaning plate is arranged on the first adjusting plate, the second adjusting plate is positioned at the input end of the water discharge cavity, and a second cleaning plate is arranged on the second adjusting plate. The automatic cleaning of the inside of the main body of the preventer can be realized, and the condition that the sealing is not tight due to excessive impurities at the joint of the second valve and the input end of the drainage cavity is effectively prevented; the design of first regulating plate and second regulating plate can be better hide, does not influence holistic use.

Description

Pipeline backflow preventer and method thereof

Technical Field

The invention belongs to the technical field of pipeline backflow preventers, and particularly relates to a pipeline backflow preventer and a pipeline backflow preventer method.

Background

The pipeline backflow preventer is a device which is composed of non-return parts and can prevent water flow in a water supply pipeline from flowing backwards; the hydraulic control combined device which is developed under the condition that the backflow pollution of the domestic drinking water pipeline is serious and the backflow pollution preventing device is not available, can strictly limit the water in the pipeline to flow unidirectionally, and has the function of preventing the medium in the pipeline from flowing backwards under any working condition so as to achieve the purpose of avoiding backflow pollution. At present, the backflow preventer is mainly divided into a low-resistance backflow preventer and a decompression type backflow preventer, wherein the head loss of the low-resistance backflow preventer is less than 3 meters according to the national standard, and the head loss of the decompression type backflow preventer is less than 7 meters. The low resistance backflow preventer consists of two independent spring-assisted elastic sealing check valves and one independent hydraulic differential water draining valve inside the middle decompression cavity. The pressure chamber of the water drain valve is connected with the upstream water supply pressure, and the three internal valves are not mechanically connected except for the common valve body (namely, the common related mechanical faults cannot occur at the same time), and the independent actions of the three internal valves are ensured, so that the pressure water in the pipeline is strictly limited to flow in one direction.

The inventor finds that after the existing pipeline backflow preventer is used for a long time, the existing pipeline backflow preventer can be accumulated too much due to impurities in a pipeline, the condition that the valve is not tightly sealed occurs, the interior of the existing pipeline backflow preventer needs to be cleaned manually, and the traditional cleaning mode is that the pipeline backflow preventer is manually cleaned after being disassembled and then installed, so that the pipeline backflow preventer is very troublesome, and pipeline circulation at two ends needs to be cut off, so that the original pipeline conveying efficiency is affected.

Accordingly, the inventor has the problem of providing a backflow preventer for pipes and a method thereof, which are expected to achieve a more practical value, by keeping the experience of design development and practical production in the related industry for many years and researching and improving the existing structure and the defects.

Disclosure of Invention

In view of at least one problem in the prior art, an object of the present invention is to provide a backflow preventer for a pipe and a method thereof.

In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:

the utility model provides a pipeline backflow preventer, includes the preventer main part, preventer main part one end is equipped with the intake chamber, and the preventer main part other end is equipped with the drainage chamber, and the preventer main part middle part is equipped with the air seal chamber, the air seal chamber communicates with intake chamber and drainage chamber respectively, the intake chamber output is equipped with but the first valve of round trip movement, the drainage chamber input is equipped with but the second valve of round trip movement, the air seal chamber below is equipped with the emptier, be equipped with rotatable regulation crown block on the drainage chamber input inner wall, the regulation crown block outside all is equipped with a plurality of telescopic movement's clearance mechanism, clearance mechanism includes first regulating plate and second regulating plate, first regulating plate and the synchronous round trip movement of second valve, be equipped with rotatable and be used for clearing up the first clearance plate of second valve edge impurity on the first regulating plate, the second regulating plate is located the drainage chamber input, and is equipped with the second clearance plate that is used for clearing up drainage chamber input edge impurity on the second regulating plate.

Preferably, the water inlet cavity middle part is equipped with fixed connection's first dead lever, first dead lever activity and sealing connection pass first valve middle part, and be equipped with the first spring that is used for driving first valve automatic closure on the first dead lever, the drainage cavity middle part is equipped with fixed connection's second dead lever, second dead lever activity and sealing connection pass second valve middle part, and be equipped with the second spring that is used for driving second valve automatic closure on the second dead lever, second dead lever middle part is equipped with the rotatory crown block that rotates the connection, be equipped with a plurality of fixed connection's impeller on the rotatory crown block, impeller outside and regulation crown block fixed connection.

Preferably, the first regulating plate and the second regulating plate are respectively provided with a corresponding sliding groove, a sliding rod is arranged between the first regulating plate and the second regulating plate, the sliding rod and the sliding grooves are in sliding and sealing connection, the second valve is provided with a limiting ring groove with a convex section, a limiting lug which is in sliding and sealing connection is arranged in the limiting ring groove, and the limiting lug is fixedly connected with the first regulating plate.

Preferably, the first adjusting plate is provided with a first adjusting groove, a first connecting shaft which is connected in a rotating way is arranged between the first cleaning plate and the first adjusting groove, the second adjusting plate is provided with a second adjusting groove, a second connecting shaft which is connected in a rotating way is arranged between the second cleaning plate and the second adjusting groove, supporting grooves are formed in the inner walls of the first adjusting groove and the second adjusting groove, supporting rods capable of moving back and forth are arranged in the supporting grooves, limiting grooves with convex cross sections are formed in the first cleaning plate and the second cleaning plate, limiting blocks in sliding connection are arranged in the limiting grooves, and the end parts of the supporting rods are connected with the limiting blocks in a rotating way.

Preferably, the first regulating plate and the second regulating plate are internally provided with driving grooves, the driving grooves are communicated with the sliding grooves, driving blocks which are in sliding and sealing connection are arranged in the driving grooves, the driving blocks are fixedly connected with the sliding rods, and one side of each driving groove is provided with a drainage groove communicated with the supporting groove.

Preferably, a plurality of recovery grooves are formed in the adjusting ring plate, the second adjusting plate is in sliding and sealing connection with the recovery grooves, symmetrically distributed clamping grooves are formed in the side walls of the recovery grooves, and telescopic clamping rods used for clamping and connecting the clamping grooves are arranged on the second adjusting plate.

Preferably, the second regulating plate is provided with symmetrically distributed positioning grooves, the clamping rods are slidably connected in the positioning grooves, the inner wall of each positioning groove is provided with a reset groove, the reset grooves are internally provided with reset blocks in sliding connection, the reset blocks are fixedly connected with the clamping rods, reset springs used for driving the clamping rods to automatically pop out are arranged in the reset grooves, the positioning grooves are communicated with the sliding grooves, the adjacent clamping rods are provided with connecting pieces which are connected and flexible, and the clamping rods are provided with driving rods which are telescopic and used for being stirred by the connecting pieces.

Preferably, the slide bar tip is equipped with the roof groove, be equipped with sliding connection's ejector pin in the roof groove, slide bar one side is equipped with hiding the groove, is equipped with sliding connection's hiding the pole in the hiding the groove, it is connected to hide unidirectional rotation between pole tip and the driving lever, it is equipped with the ejecting spring that is used for driving hiding the pole automatic pop-up to hide the inslot, and hide and be equipped with the synchronization groove that is linked together between groove and the roof groove, be equipped with flexible synchronizing piece in the synchronization groove, synchronizing piece one end and ejector pin fixed connection, and synchronizing piece other end and hiding pole fixed connection.

Preferably, the deflector rod is provided with a groove for placing the connecting piece, a hinge connected in a rotating way is arranged between the hidden rod and the deflector rod, the hinge is arranged on one side of the groove, and the hinge is provided with a torsion spring for driving the deflector rod to automatically rotate.

A backflow prevention method of a pipeline backflow preventer, which adopts the pipeline backflow preventer, comprises the following steps:

when the liquid in the S1 pipeline passes through the water inlet cavity, the first valve is propped open, so that the liquid enters the air sealing cavity, and after the air sealing cavity is filled with the liquid, the second valve is propped open, and the liquid is discharged from the water discharge cavity;

s2, when liquid in the drainage cavity flows back, the second valve can be extruded to seal the input end of the drainage cavity, the liquid is prevented from flowing back, the first valve seals the output end of the water inlet cavity, and the liquid in the air sealing cavity is discharged through the emptying device, so that air sealing is formed in the air sealing cavity;

s3, when the second valve needs to be cleaned, the adjusting ring plate is rotated only when the second valve is opened, the first adjusting plate and the second adjusting plate are extended, then the first cleaning plate and the second cleaning plate are controlled to be opened in a rotating mode, and the rotating first cleaning plate and the second cleaning plate are used for automatically cleaning the connecting edges of the second valve and the input end of the drainage cavity respectively.

Compared with the prior art, the invention has the following technical effects:

the design of the adjusting ring plate, the first cleaning plate and the second cleaning plate can drive the first cleaning plate and the second cleaning plate to rotate through the rotation of the adjusting ring plate, so that the first cleaning plate and the second cleaning plate can automatically clean the joint of the second valve and the input end of the drainage cavity, excessive impurities at the joint of the second valve and the input end of the drainage cavity are effectively prevented, the tightness of the second valve is reduced, and the condition of loose sealing occurs; the design of the first adjusting plate and the second adjusting plate can realize that the first cleaning plate and the second cleaning plate can be better hidden when not used, the integral use is not influenced, and the use is more convenient and quicker;

the design of the impeller can enable the impeller to be impacted and rotated in the process of utilizing water flow to pass through the water discharge cavity, so that the automatic rotation of the adjusting ring plate is realized, and the automatic rotary cleaning of the first cleaning plate and the second cleaning plate is realized;

the design of clamping rod and draw-in groove can make the second regulating plate outwards move the back, can realize through the mode of clamping rod and draw-in groove block that the second regulating plate is at the automatic fixation after stretching out, like this when the in-process of retrieving, when extrusion first regulating plate and second regulating plate are close to each other, the second regulating plate can not be towards retrieving the inslot motion, has guaranteed the stability when first regulating plate and second regulating plate retrieve.

Specific embodiments of the invention are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not limited in scope thereby.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic diagram of a three-dimensional structure of the second valve provided by the invention when opened.

Fig. 3 is a schematic perspective view of a second valve and cleaning mechanism according to the present invention.

Fig. 4 is a schematic diagram of a cross-sectional connection structure of a first adjusting plate, a second adjusting plate and a sliding rod provided by the invention.

Fig. 5 is a schematic diagram of a cross-sectional connection structure of a clamping rod, a sliding chute and a sliding rod provided by the invention.

FIG. 6 is a schematic diagram of a sectional connection structure of a push rod, a slide rod and a deflector rod according to the present invention.

The reference numerals in the figures illustrate: 1. a preventer body; 11. a water inlet cavity; 111. a first valve; 112. a first fixing rod; 12. a drainage cavity; 121. a second fixing rod; 122. a second valve; 13. a fixing frame; 14. an adjusting ring plate; 141. an impeller; 142. rotating the ring plate; 143. connecting the annular plates; 15. an evacuator; 16. a cleaning mechanism; 161. a first adjustment plate; 1661. a first adjustment tank; 162. a second adjusting plate; 1621. a second regulating groove; 163. a first cleaning plate; 164. a second cleaning plate; 165. a slide bar; 1651. a chute; 1652. a driving block; 1653. a driving groove; 1654. a support groove; 1655. drainage grooves; 1656. a limiting block; 1657. a limit groove; 1658. a support rod; 166. cleaning sheets; 167. a clamping rod; 1671. a reset block; 1672. a reset groove; 1673. a return spring; 1674. a connecting piece; 168. a deflector rod; 1681. a push rod; 1682. hiding the rod; 1683. an ejector spring; 1684. a top groove; 1685. a synchronization groove; 1686. a synchronizing member; 1687. hiding the groove; 160. a limit bump; 17. the cavity is sealed with air.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, shall fall within the scope of the invention.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, 2 and 3, a backflow preventer for pipeline includes a main body 1, one end of the main body 1 is provided with a water inlet chamber 11, the other end of the main body 1 is provided with a water outlet chamber 12, the middle part of the main body 1 is provided with an air sealing chamber 17, the air sealing chamber 17 is respectively communicated with the water inlet chamber 11 and the water outlet chamber 12, the output end of the water inlet chamber 11 is provided with a first valve 111 capable of moving back and forth, the input end of the water outlet chamber 12 is provided with a second valve 122 capable of moving back and forth, an evacuator 15 is arranged below the air sealing chamber 17, the inner wall of the input end of the water outlet chamber 12 is provided with a rotatable adjusting ring plate 14, a plurality of cleaning mechanisms 16 capable of moving telescopically are arranged outside the adjusting ring plate 14, each cleaning mechanism 16 comprises a first adjusting plate 161 and a second adjusting plate 162, the first adjusting plate 161 and the second valve 122 are synchronously moved back and forth, the first adjusting plate 162 is provided with a first cleaning plate 163 capable of rotating and cleaning the edge impurities of the second valve 122, the second adjusting plate 162 is positioned at the input end of the water outlet chamber 12, and the second adjusting plate 162 is provided with a second cleaning plate 164 for cleaning the edge impurities at the edge of the water outlet chamber 12.

The design of the adjusting ring plate 14, the first cleaning plate 163 and the second cleaning plate 164 can drive the first cleaning plate 163 and the second cleaning plate 164 to rotate through the rotation of the adjusting ring plate 14, so that the connection part of the second valve and the input end of the drainage cavity 12 can be automatically cleaned by the first cleaning plate 163 and the second cleaning plate 164, excessive impurities at the connection part of the second valve and the input end of the drainage cavity 12 are effectively prevented, the tightness of the second valve 122 is reduced, and the condition of loose sealing occurs; the design of first regulating plate 161 and second regulating plate 162 can realize that first clearance board 163 and second clearance board 164 can be better hidden when not using, does not influence holistic use, also convenient and fast more when using.

In this embodiment, referring to fig. 1, 2 and 3, a first fixing rod 112 is fixedly connected in the middle of the water inlet cavity 11, the first fixing rod 112 movably and hermetically passes through the middle of the first valve 111, a first spring for driving the first valve 111 to automatically close is arranged on the first fixing rod 112, a second fixing rod 121 is fixedly connected in the middle of the water outlet cavity 12, the second fixing rod 121 movably and hermetically passes through the middle of the second valve 122, a second spring for driving the second valve 122 to automatically close is arranged on the second fixing rod 121, a rotating ring plate 142 is rotatably connected in the middle of the second fixing rod 121, a plurality of impellers 141 are fixedly connected on the rotating ring plate 142, the outer sides of the impellers 141 are fixedly connected with the adjusting ring plate 14, and a fixing frame 13 for fixing the first fixing rod 112 and the second fixing rod 121 is arranged in the preventer main body 1; the inner wall of the drainage cavity 12 is provided with a connecting ring groove with a convex cross section, a connecting ring plate 143 which is in sliding and sealing connection is arranged in the connecting ring groove, and the connecting ring plate 143 is fixedly connected with the adjusting ring plate 14.

The impeller 141 is designed to impact the impeller 141 and rotate the impeller 141 in the process of passing through the drainage cavity 12 by using water flow, thereby realizing automatic rotation of the adjusting ring plate 14 and automatic rotation cleaning of the first cleaning plate 163 and the second cleaning plate 164.

Referring to fig. 4, in the present embodiment, corresponding sliding grooves 1651 are disposed on the first adjusting plate 161 and the second adjusting plate 162, a sliding rod 165 is disposed between the first adjusting plate 161 and the second adjusting plate 162, the sliding rod 165 is slidably and sealingly connected with the sliding groove 1651, a limiting ring groove with a convex cross section is disposed on the second valve, a limiting bump 160 is disposed in the limiting ring groove and slidably and sealingly connected with the limiting ring groove, and the limiting bump 160 is fixedly connected with the first adjusting plate 161.

The design of the sliding groove 1651 and the sliding rod 165 realizes that the first adjusting plate 161 and the second adjusting plate 162 are always kept in the same direction in a close and far way, and meanwhile, the combination of the limit lug 160 and the limit ring groove can realize synchronous movement of the first adjusting plate 161 and the second valve 122 without influencing the rotation of the first adjusting plate 161, so that the first cleaning plate 163 and the second cleaning plate 164 can better perform rotary cleaning.

As a possible implementation manner, referring to fig. 4, a first adjusting groove 1661 is formed on the first adjusting plate 161, a first connecting shaft rotationally connected between the first cleaning plate 163 and the first adjusting groove 1661 is formed on the second adjusting plate 162, a second adjusting groove 1621 is formed on the second adjusting plate 162, a second connecting shaft rotationally connected between the second cleaning plate 164 and the second adjusting groove 1621 is formed on the inner walls of the first adjusting groove 1661 and the second adjusting groove 1621, supporting grooves 1654 are formed on the inner walls of the first adjusting groove 1661 and the second adjusting groove 1621, supporting rods 1658 capable of moving back and forth are formed in the supporting grooves 1654, limiting grooves 1657 with convex cross sections are formed on the first cleaning plate 163 and the second cleaning plate 164, limiting blocks 1656 are formed in the limiting grooves 1657 in sliding connection, the end portions of the supporting rods 1658 are rotationally connected with the limiting blocks 1656, and cleaning sheets 166 are formed on the first cleaning plate 163 and the second cleaning plate 164.

The back and forth movement of the support rod 1658, and the combination of the limit groove 1657 and the limit block 1656 can realize the rotation opening and closing of the first cleaning plate 163 and the second cleaning plate 164, and the addition of the cleaning sheet 166 can be better surface laminating cleaning of the first cleaning plate 163 and the second cleaning plate 164 and cleaning of the surfaces needing cleaning, so that cleaning efficiency is improved.

Referring to fig. 4, in the present embodiment, the first adjusting plate 161 and the second adjusting plate 162 are respectively provided with a driving groove 1653, the driving grooves 1653 are respectively communicated with the sliding grooves 1651, driving blocks 1652 in sliding and sealing connection are respectively provided in the driving grooves 1653, the driving blocks 1652 are fixedly connected with the sliding rods 165, one side of the driving grooves 1653 is provided with a drainage groove 1655 communicated with the supporting groove 1654, and synchronization liquids are respectively provided in the driving grooves 1653, the drainage groove 1655 and the supporting groove 1654.

When the first adjusting plate 161 and the second adjusting plate 162 can be separated, the sliding rod 165 drives the driving block 1652 to move, so that the automatic rotation opening of the first cleaning plate and the second cleaning plate is realized through hydraulic transmission.

Referring to fig. 5, in the present embodiment, the adjusting ring plate 14 is provided with a plurality of recovery slots, the second adjusting plate 162 is slidably and sealingly connected with the recovery slots, the side walls of the recovery slots are provided with symmetrically distributed clamping slots, and the second adjusting plate 162 is provided with telescopic clamping rods 167 for clamping connection of the clamping slots.

The design of clamping lever 167 and draw-in groove can make the outward motion back of second regulating plate 162, can realize through the mode of clamping lever 167 and draw-in groove block that second regulating plate 162 is stretching out the automatic fixation after, when the in-process of retrieving, when extrusion first regulating plate 161 and second regulating plate 162 are close to each other, second regulating plate 162 can not be towards the interior motion of recovery groove like this, has guaranteed the stability when first regulating plate 161 and second regulating plate 162 retrieve.

In this embodiment, referring to fig. 5 and 6, the second adjusting plate 162 is provided with symmetrically distributed positioning slots, the clamping rods 167 are slidably connected in the positioning slots, the inner wall of each positioning slot is provided with a reset slot 1672, a reset block 1671 in sliding connection is provided in the reset slot 1672, the reset block 1671 is fixedly connected with the clamping rods 167, a reset spring 1673 for driving the clamping rods 167 to automatically pop out is provided in the reset slot 1672, the positioning slots are communicated with the sliding slots 1651, a connecting piece 1674 which is connected and bendable is provided between adjacent clamping rods 167, and a driving lever 168 which is telescopic and used for driving the connecting piece 1674 is provided on the clamping rods 167.

The design of the reset spring 1673 and the reset block 1671 can lead the clamping rod 167 to move to the clamping groove, the clamping rod 167 can automatically pop up under the action of the reset spring 1673 to realize the clamping fixation of the clamping rod 167 and the clamping groove, when the clamping rod is recovered, only the first regulating plate 161 and the second regulating plate 162 are close to each other, the driving rod 168 on the sliding rod 165 can stir the connecting piece 1674 at the moment, thereby driving the clamping rod 167 to synchronously recover, realizing the unlocking of the clamping rod 167, and along with the recovery of the second valve 122, the first regulating plate 161 and the second regulating plate 162 can be extruded to the recovery groove, thus realizing the automatic recovery of the first regulating plate 161 and the second regulating plate 162 without influencing the normal opening and closing of the second valve 122; meanwhile, when the first adjusting plate 161 and the second adjusting plate 162 are completely attached, the shift lever 168 is contracted, so that the shift lever 168 is separated from the connecting piece 1674, and the next automatic ejection of the clamp lever 167 is not affected.

Referring to fig. 5 and 6, in the present embodiment, a top slot 1684 is disposed at an end of the sliding rod 165, a push rod 1681 in sliding connection is disposed in the top slot 1684, a hidden slot 1687 is disposed at one side of the sliding rod 165, a hidden rod 1682 in sliding connection is disposed in the hidden slot 1687, a single-way rotation connection is disposed between an end of the hidden rod 1682 and the driving rod 168, an ejection spring 1683 for driving the hidden rod 1682 to automatically eject is disposed in the hidden slot 1687, a synchronization slot 1685 is disposed between the hidden slot 1687 and the top slot 1684, a flexible synchronization member 1686 is disposed in the synchronization slot 1685, one end of the synchronization member 1686 is fixedly connected with the push rod 1681, another end of the synchronization member 1686 is fixedly connected with the hidden rod 1682, a groove for placing the connection member 1674 is disposed on the driving rod 168, a hinge in rotating connection is disposed between the hidden rod 1682 and the driving rod 168, the hinge is disposed at one side of the groove, and a torsion spring for driving the driving rod 168 to automatically rotate is disposed on the hinge.

In this application, pipeline backflow preventer is when the clearance:

as the water pressure fully pushes the second valve 122 open, at this time, the second valve 122 drives the first adjusting plate 161 and the second adjusting plate 162 to be separated from the recovery tank, when the clamping rod 167 moves to the clamping tank, the elasticity of the return spring 1673 can drive the clamping rod 167 to automatically pop out and be clamped and fixed with the clamping tank, thereby automatically fixing the second adjusting plate 162, along with the continuous movement of the second valve 122, the first adjusting plate 161 and the second adjusting plate 162 can be moved to move outwards along the two ends of the slide rod 165, in the movement process, the driving block 1652 can be driven to move, thereby, through the way of hydraulic transmission, the supporting rod 1658 is extruded to move outwards, the supporting rod 1658 is used for synchronously rotating and extruding and opening the first cleaning plate 163 and the second cleaning plate 164, so that the cleaning plate 166 is attached to the corresponding cleaning surface required, and when water flows through the impeller 141, the impeller 141 can be driven to rotate, thereby rotating the adjusting ring plate 14, once the second valve 122 is fully opened, the first cleaning plate 163 and the second cleaning plate 164 can be driven to rotate along with the automatic cleaning plate 162, thereby effectively reducing the impurity accumulation on the second valve 122, and the second cleaning cavity 12 can be effectively prevented from being accumulated and accumulated on the second valve 14;

when the second valve 122 is closed, the second valve 122 firstly presses the first adjusting plate 161 towards the second adjusting plate 162, so that the first cleaning plate 163 and the second cleaning plate 164 can automatically rotate and retract into the corresponding first adjusting plate 161 and second adjusting plate 162 by means of hydraulic transmission driving, when the first cleaning plate 163 and the second cleaning plate 164 are completely retracted, along with the approach of the first adjusting plate 161 and the second adjusting plate 162, the deflector 168 on the slide bar 165 can squeeze the connecting piece 1674, thereby driving the clip bar 167 to automatically retract by the connecting piece 1674, automatically releasing the clip fixation of the clip bar 167 and the clip groove, and along with the continued movement of the slide bar 165, the push rod 1681 can be moved towards the end of the corresponding slide groove 1651, so that the push rod 1681 is extruded, the push rod 1681 can automatically retract into the hidden groove 1687 by the driving of the synchronous piece 1686, so that the shift lever 168 can be automatically recovered into the hidden slot 1687, the shift lever 168 and the connecting piece 1674 are automatically separated, the connecting piece 1674 moves to one side of the shift lever 168 under the action of the reset spring 1673, the one-way rotation connection between the shift lever 168 and the hidden lever 1682 and the design of the torsion spring can enable the shift lever 168 to drive the push rod 1681 and the shift lever 168 to automatically pop up under the action of the ejection spring 1683 when the first adjusting plate 161 is separated from the second adjusting plate 162, namely, the slide rod 165 is separated from the end part of the slide slot 1651, at the moment, when the shift lever 168 moves to the connecting piece 1674, the connecting piece 1674 can pass the shift lever 168 in a rotating way by extruding the shift lever 168, so that the integral operation is not influenced, and meanwhile, the addition of the torsion spring can enable the shift lever 168 to automatically rotate to restore the initial state after the connecting piece 168 passes the shift lever 168; the next automatic unlocking is convenient.

A backflow prevention method of a pipeline backflow preventer adopts the pipeline backflow preventer, and comprises the following steps:

when the liquid in the S1 pipeline passes through the water inlet cavity 11, the first valve 111 is propped open, so that the liquid enters the air sealing cavity 17, and after the air sealing cavity 17 is filled with the liquid, the second valve 122 is propped open and is discharged from the water discharge cavity 12;

s2, when the liquid in the drainage cavity 12 flows back, the second valve 122 can be extruded to seal the input end of the drainage cavity 12, the liquid is prevented from flowing back, the first valve 111 seals the output end of the water inlet cavity 11, the liquid in the air sealing cavity 17 is discharged through the emptier 15, and the air sealing cavity 17 is sealed by air;

s3, when the second valve 122 needs to be cleaned, only the adjusting ring plate 14 is required to be rotated when the second valve 122 is opened, the first adjusting plate 161 and the second adjusting plate 162 are extended simultaneously, and then the first cleaning plate 163 and the second cleaning plate 164 are controlled to be rotated and opened, so that the rotating first cleaning plate 163 and the second cleaning plate 164 can respectively and automatically clean the connecting edges of the second valve 122 and the input end of the drainage cavity 12.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional.

Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the application should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego such subject matter, nor should the inventors regard such subject matter as not be considered to be part of the disclosed subject matter.

Claims

1. The utility model provides a pipeline backflow preventer, includes the preventer main part, preventer main part one end is equipped with the intake chamber, and the preventer main part other end is equipped with the drainage chamber, and is equipped with the air seal chamber in the middle part of the preventer main part, the air seal chamber communicates with intake chamber and drainage chamber respectively, the intake chamber output is equipped with but the first valve of round trip movement, the drainage chamber input is equipped with but the second valve of round trip movement, the air seal chamber below is equipped with the emptier, its characterized in that: be equipped with rotatable adjusting ring board on the drainage chamber input inner wall, the adjusting ring board outside all is equipped with a plurality of telescopic movement's clearance mechanism, clearance mechanism includes first regulating plate and second regulating plate, synchronous back and forth movement of first regulating plate and second valve, be equipped with rotatable and be used for the first clearance board of clearance second valve edge impurity on the first regulating plate, the second regulating plate is located the drainage chamber input, and is equipped with the second clearance board that is used for clearing up drainage chamber input edge impurity on the second regulating plate.

2. The pipe backflow preventer of claim 1, wherein: the middle part of the water inlet cavity is provided with a first fixed rod which is fixedly connected, the first fixed rod movably and hermetically penetrates through the middle part of the first valve, the first fixed rod is provided with a first spring for driving the first valve to automatically close, the middle part of the water outlet cavity is provided with a second fixed rod which is fixedly connected, the second dead lever activity and sealing connection pass second valve middle part, and be equipped with the second spring that is used for driving second valve automatic closure on the second dead lever, second dead lever middle part is equipped with the rotatory crown block that rotates the connection, be equipped with a plurality of fixed connection's impeller on the rotatory crown block, impeller outside and regulation crown block fixed connection.

3. The pipe backflow preventer of claim 1, wherein: corresponding sliding grooves are formed in the first adjusting plate and the second adjusting plate, a sliding rod is arranged between the first adjusting plate and the second adjusting plate, the sliding rod and the sliding grooves are in sliding and sealing connection, a limiting ring groove with a convex profile is formed in the second valve, a limiting protruding block which is in sliding and sealing connection is arranged in the limiting ring groove, and the limiting protruding block is fixedly connected with the first adjusting plate.

4. A pipe backflow preventer according to claim 3 wherein: be equipped with first regulating groove on the first regulating plate, be equipped with the first connecting axle that rotates to be connected between first clearance board and the first regulating groove, be equipped with the second regulating groove on the second regulating plate, be equipped with the second connecting axle that rotates to be connected between second clearance board and the second regulating groove, all be equipped with the supporting groove on first regulating groove and the second regulating groove inner wall, but be equipped with the bracing piece of round trip movement in the supporting groove, all be equipped with the spacing groove that the section is convex on first clearance board and the second clearance board, be equipped with sliding connection's stopper in the spacing groove, the bracing piece tip rotates with the stopper to be connected.

5. The pipe backflow preventer of claim 4, wherein: the novel sliding guide device is characterized in that driving grooves are formed in the first adjusting plate and the second adjusting plate, the driving grooves are communicated with the sliding grooves, driving blocks which are in sliding and sealing connection are arranged in the driving grooves, the driving blocks are fixedly connected with the sliding rods, and drainage grooves communicated with the supporting grooves are formed in one side of each driving groove.

6. The pipe backflow preventer of claim 4, wherein: the adjustable ring plate is provided with a plurality of recovery grooves, the second adjustable plate is in sliding and sealing connection with the recovery grooves, clamping grooves which are symmetrically distributed are arranged on the side wall of the recovery grooves, and the second adjustable plate is provided with clamping rods which are telescopic and are used for clamping and connecting the clamping grooves.

7. The pipe backflow preventer of claim 6, wherein: the utility model discloses a clamping device, including the clamping rod, the clamping rod is equipped with the constant head tank, be equipped with the constant head tank of symmetric distribution on the second regulating plate, clamping rod sliding connection is in the constant head tank, be equipped with the reset piece of sliding connection on the constant head tank inner wall, reset piece and clamping rod fixed connection, be equipped with the reset spring that is used for driving clamping rod automatic pop-up in the reset groove, be linked together between constant head tank and the spout, it is adjacent be equipped with the connecting piece that is connected and flexible between the clamping rod, be equipped with the driving lever that scalable and be used for the connecting piece to stir on the clamping rod.

8. The pipe backflow preventer of claim 7, wherein: the ejector rod is characterized in that the end part of the sliding rod is provided with an ejector groove, a push rod in sliding connection is arranged in the ejector groove, a hidden groove is formed in one side of the sliding rod, a hidden rod in sliding connection is arranged in the hidden groove, the end part of the hidden rod is connected with the deflector rod in a unidirectional rotation mode, an ejection spring used for driving the hidden rod to automatically eject out is arranged in the hidden groove, a synchronous groove communicated with the ejector groove is formed between the hidden groove and the ejector groove, a bendable synchronous piece is arranged in the synchronous groove, one end of the synchronous piece is fixedly connected with the push rod, and the other end of the synchronous piece is fixedly connected with the hidden rod.

9. The pipe backflow preventer of claim 8, wherein: the connecting device is characterized in that a groove for placing the connecting piece is formed in the deflector rod, a hinge connected in a rotating mode is arranged between the hidden rod and the deflector rod, the hinge is arranged on one side of the groove, and a torsion spring for driving the deflector rod to automatically rotate is arranged on the hinge.

10. A backflow preventing method of a pipe backflow preventer, adopting the pipe backflow preventer of claim 1, comprising the steps of: