CN117489832A - Pipe backflow preventer and method thereof - Google Patents

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

Pipe backflow preventer and method thereof

Technical field

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

Background technique

The pipeline backflow preventer is a device composed of non-return components that can prevent the backflow of water in water supply pipelines. It is a strictly limited pipeline developed when the backflow pollution of domestic drinking water pipelines is serious and there is no effective device to prevent backflow pollution. A hydraulic control combination device where water can only flow in one direction. Its function is to prevent the medium in the pipeline from flowing back under any working conditions, so as to avoid backflow pollution. At present, backflow preventers are mainly divided into two categories: low-resistance backflow preventers and decompression-type backflow preventers. According to national standards, the water head loss of low-resistance backflow preventers is less than 3 meters, and the head loss of pressure-reducing backflow preventers is less than 7 meters. The low-resistance backflow preventer is composed of two independent spring-assisted elastic sealing check valves and an independent hydraulic differential drain valve in the intermediate pressure reducing chamber. The pressure chamber of the drain valve is connected to the upstream water supply pressure. Except for the common valve body, the three internal valves have no mechanical connection (that is, common related mechanical failures will not occur at the same time), and are guaranteed to operate independently, and the pipelines are strictly limited. The pressure water in the pump can only flow in one direction.

In the process of using the existing pipeline backflow preventer, the inventor found that after long-term use, the valve would not be tightly sealed due to excessive accumulation of impurities in the pipeline, requiring manual inspection. For internal cleaning, the traditional cleaning method is to disassemble the pipeline backflow preventer, clean it manually, and then install it again, which is very troublesome and requires cutting off the pipeline circulation at both ends, affecting the original pipeline transportation efficiency.

Therefore, in view of this, the inventor adheres to many years of rich experience in design, development and actual production in this related industry, researches and improves the existing structure and deficiencies, and provides a pipeline backflow preventer and method, in order to achieve a more practical value purpose.

Contents of the invention

To address at least one problem in the prior art, one object of the present invention is to provide a pipeline backflow preventer and a method thereof.

In order to achieve the above object, the present invention adopts the following technical solutions to achieve it:

A pipeline backflow preventer includes a preventer body, one end of the preventer body is provided with a water inlet cavity, the other end of the preventer body is provided with a drainage cavity, and the middle part of the preventer body is provided with an air sealing cavity, the air sealing cavity They are respectively connected with the water inlet chamber and the drainage chamber. The output end of the water inlet chamber is provided with a first valve that can move back and forth. The input end of the drainage chamber is provided with a second valve that can move back and forth. There is a valve located below the air seal chamber. There is an evacuation device, and a rotatable adjusting ring plate is provided on the inner wall of the input end of the drainage chamber. A plurality of telescopic cleaning mechanisms are provided on the outside of the adjusting ring plate. The cleaning mechanism includes a first adjusting plate and a The second adjusting plate moves back and forth synchronously with the second valve. The first adjusting plate is provided with a rotatable first cleaning plate for cleaning the edge impurities of the second valve. The second adjusting plate The plate is located at the input end of the drainage cavity, and the second adjustment plate is provided with a second cleaning plate for cleaning impurities at the edge of the input end of the drainage cavity.

Preferably, the middle part of the water inlet chamber is provided with a first fixed rod that is fixedly connected. The first fixed rod is movable and sealingly connected through the middle part of the first valve, and the first fixed rod is provided with a first fixed rod for driving the first valve. The first spring that automatically closes, the middle part of the drainage chamber is provided with a second fixed rod that is fixedly connected, the second fixed rod is movable and sealingly connected through the middle part of the second valve, and the second fixed rod is provided with a driving force The second spring for automatic closing of the second valve. The middle part of the second fixed rod is provided with a rotating ring plate that is rotationally connected. The rotating ring plate is provided with a plurality of fixedly connected impellers. The outside of the impeller is fixed to the adjusting ring plate. connect.

Preferably, the first adjustment plate and the second adjustment plate are each provided with corresponding slide grooves, and a slide bar is provided between the first adjustment plate and the second adjustment plate, between the slide bar and the slide groove Sliding and sealing connection, the second valve is provided with a limit ring groove with a convex cross-section, and a limit bump is provided with a sliding and seal connection in the limit ring groove, and the limit bump is connected with the third One adjustment plate is fixedly connected.

Preferably, the first adjustment plate is provided with a first adjustment groove, the first cleaning plate and the first adjustment groove are provided with a first connecting shaft for rotational connection, and the second adjustment plate is provided with a third Two adjustment grooves, a second connecting shaft for rotational connection is provided between the second cleaning plate and the second adjustment groove, a support groove is provided on the inner wall of the first adjustment groove and the second adjustment groove, and the support groove is There is a support rod that can move back and forth. The first cleaning plate and the second cleaning plate are both provided with limit grooves with a convex cross section. The limit grooves are provided with slidingly connected limit blocks, so The end of the support rod is rotationally connected to the limiting block.

Preferably, the first adjustment plate and the second adjustment plate are both provided with driving grooves, the driving grooves are connected with the chute, and the driving grooves are equipped with sliding and sealingly connected driving blocks. The driving blocks Fixedly connected to the sliding rod, a drainage groove connected to the support groove is provided on one side of the driving groove.

Preferably, the adjustment ring plate is provided with a plurality of recovery grooves, the second adjustment plate is slidably and sealingly connected with the recovery groove, and the side walls of the recovery groove are provided with symmetrically distributed card grooves. The board is provided with a retractable clamping rod for snapping connection with the slot.

Preferably, the second adjustment plate is provided with symmetrically distributed positioning grooves, the clamping rod is slidingly connected in the positioning groove, a reset groove is provided on the inner wall of the positioning groove, and a sliding connection is provided in the reset groove. The reset block is fixedly connected to the clamping rod. The reset groove is provided with a reset spring for driving the clamping rod to automatically pop up. The positioning groove and the chute are connected, and the adjacent clamping rods are connected to each other. There are connected and bendable connectors, and the clamping bar is provided with a telescopic lever for turning the connectors.

Preferably, the end of the sliding rod is provided with a top groove, the top groove is provided with a slidingly connected ejector rod, one side of the sliding rod is provided with a hidden groove, and the hidden groove is provided with a slidingly connected hidden rod, so There is a one-way rotational connection between the end of the hidden rod and the lever. The hidden groove is provided with an ejection spring for driving the hidden rod to automatically pop up, and a connected synchronization groove is provided between the hidden groove and the top groove, so A bendable synchronization piece is provided in the synchronization groove. One end of the synchronization piece is fixedly connected to the ejector rod, and the other end of the synchronization piece is fixedly connected to the hidden rod.

Preferably, the lever is provided with a groove for placing the connector, a hinge for rotational connection is provided between the hidden lever and the lever, the hinge is provided on one side of the groove, and the hinge is provided with a It is a torsion spring that drives the lever to rotate automatically.

A backflow prevention method of a pipeline backflow preventer, using the pipeline backflow preventer, includes the following steps:

When the liquid in the S1 pipe passes through the water inlet chamber, the first valve is pushed open, so that the liquid enters the air seal cavity. After the liquid fills the air seal cavity, the second valve is pushed open and discharged from the drainage cavity;

S2 When the liquid in the drainage cavity flows back, it can squeeze the second valve to seal the input end of the drainage cavity to prevent liquid from flowing back. The first valve seals the output end of the water inlet cavity, and the liquid in the air seal cavity is discharged through the evacuator. , forming an air seal in the air seal cavity;

When S3 needs to clean the second valve, you only need to turn the adjusting ring plate when the second valve is open, and extend the first adjusting plate and the second adjusting plate at the same time, and then control the first cleaning plate and the second The cleaning plate rotates and opens, so that the rotating first cleaning plate and the second cleaning plate automatically clean the connecting edge of the second valve and the input end of the drainage chamber respectively.

Compared with the existing technology, the present 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 by adjusting the rotation of the ring plate, so that the first cleaning plate and the second cleaning plate can clean the second cleaning plate. The connection between the second valve and the input end of the drainage cavity is automatically cleaned, which effectively prevents excessive impurities at the connection between the second valve and the input end of the drainage cavity, resulting in a decrease in the sealing performance of the second valve and lax sealing; the first adjustment The design of the plate and the second adjusting plate enables the first cleaning plate and the second cleaning plate to be better hidden when not in use, without affecting the overall use, and making them more convenient and faster to use;

The design of the impeller enables the water flow to pass through the drainage chamber to impact the impeller and rotate the impeller, thereby realizing the automatic rotation of the adjusting ring plate, thereby realizing the automatic rotation and cleaning of the first cleaning plate and the second cleaning plate;

The design of the clamping rod and the clamping slot enables the second adjusting plate to move outward and then the second adjusting plate can be automatically fixed after being extended through the engagement of the clamping rod and the clamping slot. In this way, during the recycling process When the first adjustment plate and the second adjustment plate are squeezed close to each other, the second adjustment plate will not move toward the recovery tank, ensuring the stability of the first adjustment plate and the second adjustment plate when they are recovered.

Referring to the following description and drawings, specific embodiments of the invention are disclosed in detail and the manner in which the principles of the invention may be employed is indicated. It should be understood that embodiments of the invention are not thereby limited in scope.

Features described and/or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, in combination with features in other embodiments, or in place of features in other embodiments .

It should be emphasized that the term "comprising" when used herein refers to the presence of features, integers, steps or components but does not exclude the presence or addition of one or more other features, integers, steps or components.

Description of the drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is a schematic three-dimensional structural diagram provided by the present invention.

Figure 2 is a schematic three-dimensional structural diagram of the second valve provided by the present invention when it is opened.

Figure 3 is a schematic three-dimensional structural diagram of the second valve and cleaning mechanism provided by the present invention.

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

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

Figure 6 is a schematic diagram of the cross-sectional connection structure of the push rod, sliding rod and lever provided by the present invention.

Description of numbers in the figure: 1. Preventer body; 11. Water inlet chamber; 111. First valve; 112. First fixed rod; 12. Drainage chamber; 121. Second fixed rod; 122. Second valve; 13. Fixed frame; 14. Adjusting ring plate; 141. Impeller; 142. Rotating ring plate; 143. Connecting ring plate; 15. Evacuator; 16. Cleaning mechanism; 161. First adjusting plate; 1661. First adjusting groove; 162. Second adjusting plate; 1621. Second adjusting slot; 163. First cleaning plate; 164. Second cleaning plate; 165. Slide rod; 1651. Chute; 1652. Driving block; 1653. Driving slot; 1654. Support groove; 1655, drainage groove; 1656, limit block; 1657, limit groove; 1658, support rod; 166, cleaning piece; 167, clamping rod; 1671, reset block; 1672, reset slot; 1673, return spring; 1674. Connecting piece; 168. Lever; 1681. Ejector rod; 1682. Hidden rod; 1683. Ejection spring; 1684. Ejection groove; 1685. Synchronization groove; 1686. Synchronization piece; 1687. Hidden groove; 160. Limit Bump; 17. Air sealing cavity.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts should fall within the scope of protection of the present invention.

It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or the other element may be interveningly present. When an element is said to be "connected" to another element, it can be directly connected to the other element or it may be present between the other element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

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

Embodiment 1, please refer to Figures 1, 2 and 3. A pipeline backflow preventer includes a preventer body 1. One end of the preventer body 1 is provided with a water inlet chamber 11, and the other end of the preventer body 1 is provided with a drainage chamber. 12, and there is an air sealing chamber 17 in the middle of the preventer body 1. The air sealing chamber 17 is connected with the water inlet chamber 11 and the drainage chamber 12 respectively. The output end of the water inlet chamber 11 is provided with a first valve 111 that can move back and forth. The drainage chamber The input end of 12 is provided with a second valve 122 that can move back and forth. An evacuator 15 is provided below the air sealing chamber 17. The inner wall of the input end of the drainage chamber 12 is provided with a rotatable adjusting ring plate 14. There are rotatable adjusting ring plates 14 on the outside of the adjusting ring plate 14. There are multiple retractable cleaning mechanisms 16. The cleaning mechanism 16 includes a first adjusting plate 161 and a second adjusting plate 162. The first adjusting plate 161 moves back and forth synchronously with the second valve 122. The first adjusting plate 161 is provided with a removable The first cleaning plate 163 rotates and is used to clean the impurities at the edge of the second valve 122. The second adjustment plate 162 is located at the input end of the drainage chamber 12, and the second adjustment plate 162 is provided with a first cleaning plate 163 for cleaning impurities at the edge of the input end of the drainage chamber 12. Second cleaning plate 164.

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, thereby causing the first cleaning plate 163 and the second cleaning plate 164 to rotate. The second cleaning plate 164 can automatically clean the connection between the second valve and the input end of the drainage cavity 12, effectively preventing excessive impurities at the connection between the second valve and the input end of the drainage cavity 12, resulting in a decrease in the sealing performance of the second valve 122. , the sealing is not tight; the design of the first adjustment plate 161 and the second adjustment plate 162 can realize that the first cleaning plate 163 and the second cleaning plate 164 can be better hidden when not in use, without affecting the The overall use is also more convenient and faster when using it.

In this embodiment, please refer to Figures 1, 2 and 3. A first fixed rod 112 is fixedly connected in the middle of the water inlet chamber 11. The first fixed rod 112 is movable and sealingly connected through the middle of the first valve 111. , and the first fixed rod 112 is provided with a first spring for driving the first valve 111 to automatically close, and a second fixed rod 121 is fixedly connected in the middle of the drainage chamber 12, and the second fixed rod 121 is movable and sealedly connected through The second fixed rod 122 is provided with a second spring in the middle to drive the second valve 122 to automatically close. The second fixed rod 121 is provided with a rotating ring plate 142 in the middle. The rotating ring plate 142 is provided with a second spring. There are a plurality of fixedly connected impellers 141, and the outside of the impeller 141 is fixedly connected to the adjusting ring plate 14. The preventer body 1 is provided with a fixing frame 13 for fixing the first fixing rod 112 and the second fixing rod 121; the inner wall of the drainage cavity 12 There is a connecting ring groove with a convex cross section, and a sliding and sealing connecting ring plate 143 is provided in the connecting ring groove. The connecting ring plate 143 is fixedly connected to the adjusting ring plate 14 .

The design of the impeller 141 enables the water flow to impact the impeller 141 during the process of passing through the drainage chamber 12, causing the impeller 141 to rotate, thereby realizing the automatic rotation of the adjusting ring plate 14, thereby realizing the first cleaning plate 163 and the second cleaning Automatic rotation cleaning of plate 164.

Please refer to Figure 4. In this embodiment, the first adjustment plate 161 and the second adjustment plate 162 are both provided with corresponding slide grooves 1651, and there is a slide groove between the first adjustment plate 161 and the second adjustment plate 162. The rod 165, the sliding rod 165 and the chute 1651 are slidingly and sealedly connected. The second valve is provided with a limit ring groove with a convex cross-section, and a limiter bump 160 is provided with a sliding and sealing connection in the limit ring groove. , the limiting bump 160 is fixedly connected to the first adjusting plate 161 .

The design of the slide groove 1651 and the sliding rod 165 realizes that the approach and distance between the first adjustment plate 161 and the second adjustment plate 162 are always in the same direction. At the same time, the combination of the limit bump 160 and the limit ring groove can realize The first adjusting plate 161 and the second valve 122 move synchronously without affecting the rotation of the first adjusting plate 161, so that the first cleaning plate 163 and the second cleaning plate 164 can perform rotational cleaning better.

As a possible implementation, please refer to Figure 4. The first adjustment plate 161 is provided with a first adjustment groove 1661, and a first connecting shaft is provided with a rotational connection between the first cleaning plate 163 and the first adjustment groove 1661. The second adjustment plate 162 is provided with a second adjustment groove 1621, and a second connecting shaft is provided with a rotational connection between the second cleaning plate 164 and the second adjustment groove 1621. The inner walls of the first adjustment groove 1661 and the second adjustment groove 1621 are Both are provided with a support groove 1654, and a support rod 1658 that can move back and forth is provided in the support groove 1654. The first cleaning plate 163 and the second cleaning plate 164 are both provided with a limiting groove 1657 with a convex cross section. The limiting groove 1657 There is a slidingly connected limit block 1656 inside. The end of the support rod 1658 is rotationally connected to the limit block 1656. The first cleaning plate 163 and the second cleaning plate 164 are both provided with cleaning pieces 166.

The back and forth movement of the support rod 1658 and the combination of the limiting groove 1657 and the limiting block 1656 can realize the rotation opening and closing of the first cleaning plate 163 and the second cleaning plate 164. The addition of the cleaning piece 166 can be the first The cleaning plate 163 and the second cleaning plate 164 can better clean the surface that needs to be cleaned, thereby improving the cleaning efficiency.

Please refer to Figure 4. In this embodiment, the first adjustment plate 161 and the second adjustment plate 162 are both provided with driving grooves 1653. The driving grooves 1653 are both connected with the chute 1651, and both the driving grooves 1653 are provided with sliding and The driving block 1652 is sealed and connected. The driving block 1652 is fixedly connected to the sliding rod 165. There is a drainage groove 1655 connected with the support groove 1654 on one side of the driving groove 1653. The driving groove 1653, the drainage groove 1655 and the support groove 1654 are all provided with Sync fluid.

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, thereby realizing automatic rotation and opening of the first cleaning plate and the second cleaning plate through hydraulic transmission.

Please refer to Figure 5. In this embodiment, the adjustment ring plate 14 is provided with a plurality of recovery grooves. The second adjustment plate 162 is slidably and sealingly connected with the recovery grooves. The side walls of the recovery grooves are provided with symmetrically distributed card grooves. The two adjustment plates 162 are provided with retractable clamping rods 167 for slot-locking connection.

The design of the clamping rod 167 and the clamping slot enables the second adjusting plate 162 to move outward, and then the second adjusting plate 162 can be automatically fixed after being extended through the engagement of the clamping rod 167 and the slot. In this way When the first adjusting plate 161 and the second adjusting plate 162 are squeezed close to each other during the recycling process, the second adjusting plate 162 will not move toward the recycling tank, ensuring that the first adjusting plate 161 and the second adjusting plate 162 Stability during recycling.

In this embodiment, please refer to Figures 5 and 6. The second adjustment plate 162 is provided with symmetrically distributed positioning grooves. The clamping rod 167 is slidingly connected in the positioning groove. The inner wall of the positioning groove is provided with a reset groove 1672. The reset groove 1672 is provided with a slidingly connected reset block 1671. The reset block 1671 is fixedly connected to the clamping rod 167. The reset groove 1672 is provided with a return spring 1673 for driving the clamping rod 167 to automatically pop up. The positioning groove and the chute 1651 are connected. Connected and flexible connectors 1674 are provided between adjacent clamping bars 167 , and a telescopic lever 168 is provided on the clamping bars 167 for turning the connecting member 1674 .

The design of the return spring 1673 and the reset block 1671 enables the clamping rod 167 to automatically pop up under the action of the return spring 1673 when the clamping rod 167 moves to the slot, thereby realizing the engagement and fixation of the clamping rod 167 and the clamping slot. When retracting, only when the first adjusting plate 161 and the second adjusting plate 162 are about to approach, the lever 168 on the sliding rod 165 can move the connecting piece 1674, thereby driving the clamping bar 167 to be synchronously recovered, realizing With the unlocking of the clamping rod 167 and the recovery of the second valve 122, the first adjustment plate 161 and the second adjustment plate 162 can be squeezed into the recovery groove, thereby realizing the first adjustment plate 161 and the second adjustment plate 162. It is automatically recovered and does not affect the normal opening and closing of the second valve 122; at the same time, when the first adjustment plate 161 and the second adjustment plate 162 are completely fitted, the lever 168 is contracted, so that the lever 168 can be connected to the connecting piece 1674 is separated, thereby not affecting the next automatic ejection of the clamping rod 167.

Please refer to Figures 5 and 6. In this embodiment, a top groove 1684 is provided at the end of the sliding rod 165. A slidingly connected top rod 1681 is provided in the top groove 1684. A hidden groove 1687 is provided on one side of the sliding rod 165. The groove 1687 is provided with a slidingly connected hidden rod 1682. The end of the hidden rod 1682 is connected to the lever 168 for one-way rotation. The hidden groove 1687 is provided with an ejection spring 1683 for driving the hidden rod 1682 to automatically pop up. There is a synchronization groove 1685 connected between 1687 and the top groove 1684. A flexible synchronization piece 1686 is provided in the synchronization groove 1685. One end of the synchronization piece 1686 is fixedly connected to the push rod 1681, and the other end of the synchronization piece 1686 is connected to the hidden rod 1682. Fixed connection, the lever 168 is provided with a groove for placing the connector 1674, a hinge for rotational connection is provided between the hidden lever 1682 and the lever 168, the hinge is arranged on one side of the groove, and there is a hinge for driving The lever 168 is a torsion spring that automatically rotates.

In this application, when cleaning the pipeline backflow preventer:

With the water pressure, the second valve 122 is completely pushed open. At this time, the second valve 122 drives the first adjustment plate 161 and the second adjustment plate 162 to separate from the recovery tank. When the clamping rod 167 moves to the slot, it is reset. The elasticity of the spring 1673 can drive the clamping rod 167 to automatically pop up and engage with the slot, thereby automatically fixing the second adjusting plate 162. With the continuous movement of the second valve 122, the first adjusting plate 161 and the second adjusting plate can be mobilized. The plates 162 are separated, and the first adjusting plate 161 and the second adjusting plate 162 move outward along the two ends of the sliding rod 165. During the movement, the driving block 1652 can be driven to move, thereby squeezing the support through hydraulic transmission. The rod 1658 moves outward, causing the support rod 1658 to synchronously rotate the first cleaning plate 163 and the second cleaning plate 164 outward and squeeze open, so that the cleaning piece 166 fits the corresponding surface that needs to be cleaned, and when the water flow passes through the impeller 141 , can drive the impeller 141 to rotate, thereby causing the adjusting ring plate 14 to rotate, so that once the second valve 122 is fully opened, the first cleaning plate 163 and the second cleaning plate 164 can automatically rotate with the rotation of the adjusting ring plate 14, so that Automatically clean the second valve 122 and the input end of the drainage chamber 12 to effectively prevent the accumulation of impurities and reduce the sealing effect of the second valve 122;

When the second valve 122 is closed, the second valve 122 first squeezes the first adjusting plate 161 toward the second adjusting plate 162, so that the first cleaning plate 163 and the second cleaning plate 163 are driven by hydraulic transmission. The cleaning plate 164 can automatically rotate and be recovered into the corresponding first adjusting plate 161 and the second adjusting plate 162. When the first cleaning plate 163 and the second cleaning plate 164 are completely recovered, as the first adjusting plate 161 and the second adjusting plate 164 are completely recovered, The approach of the plate 162 enables the lever 168 on the sliding rod 165 to squeeze the connecting piece 1674, thereby driving the clamping rod 167 to automatically retract through the connecting piece 1674, and automatically releasing the engagement and fixation between the clamping rod 167 and the slot. The continued movement of the sliding rod 165 can make the ejector rod 1681 move toward the corresponding end of the chute 1651, thereby squeezing the ejector rod 1681. The extrusion of the ejector rod 1681 can drive the hidden rod 1682 to automatically recover to the position through the synchronization piece 1686. In the hidden groove 1687, the lever 168 can be automatically recovered into the hidden groove 1687, so that the lever 168 and the connector 1674 are automatically separated. Under the action of the return spring 1673, the connector 1674 moves to one side of the lever 168. The one-way rotation connection between the lever 168 and the hidden lever 1682 and the design of the torsion spring can enable the first adjustment plate 161 to separate from the second adjustment plate 162, that is, when the sliding rod 165 separates from the end of the chute 1651. , the lever 168 can drive the ejector pin 1681 and the lever 168 to automatically pop up under the action of the ejection spring 1683. At this time, when the lever 168 moves to the connecting piece 1674, the connecting piece 1674 can rotate by squeezing the lever 168. Crossing the lever 168 will not affect the overall operation. At the same time, the addition of the torsion spring can enable the lever 168 to automatically rotate and return to the initial state after the connecting piece 1674 crosses the lever 168; thus facilitating automatic unlocking next time.

A method for preventing backflow of a pipeline backflow preventer. The pipeline backflow preventer used includes the following steps:

When the liquid in the S1 pipe passes through the water inlet chamber 11, the first valve 111 is pushed open, so that the liquid enters the air seal chamber 17. After the liquid fills the air seal chamber 17, the second valve 122 is pushed open to drain water. cavity 12 discharge;

S2 When the liquid in the drainage chamber 12 flows back, the second valve 122 can be squeezed to seal the input end of the drainage chamber 12 to prevent the liquid from flowing back. The first valve 111 seals the output end of the water inlet chamber 11, and the air in the air seal chamber 17 The liquid is discharged through the evacuator 15 to form an air seal in the air seal cavity 17;

S3 When the second valve 122 needs to be cleaned, it is only necessary to rotate the adjusting ring plate 14 when the second valve 122 is opened, and at the same time extend the first adjusting plate 161 and the second adjusting plate 162, and then control the first The cleaning plate 163 and the second cleaning plate 164 rotate and open, so that the rotating first cleaning plate 163 and the second cleaning plate 164 automatically clean the connecting edge of the second valve 122 and the input end of the drainage chamber 12 respectively.

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

Multiple elements, components, components or steps can be provided by a single integrated element, component, component or step. Alternatively, a single integrated element, component, component or step may be divided into separate multiple elements, components, components or steps. The word "a" or "an" used to describe an element, component, component or step is not intended to exclude other elements, components, components or steps.

It should be understood that the above description is for purposes of illustration rather than limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art from reading the above description. The scope of the application should, therefore, be determined not with reference to the foregoing description, but rather with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. For purposes of comprehensiveness, the disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not intended to be a disclaimer of that subject matter, nor should it be deemed that the inventors failed to consider such subject matter to be part of the disclosed inventive subject matter.

Claims (10)

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:

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.