CN112283586A

CN112283586A - Vacuum breaker for liquid conveying pipeline

Info

Publication number: CN112283586A
Application number: CN202011106628.1A
Authority: CN
Inventors: 陈希
Original assignee: Individual
Current assignee: Zhejiang Valogin Technology Co ltd
Priority date: 2020-10-16
Filing date: 2020-10-16
Publication date: 2021-01-29
Anticipated expiration: 2040-10-16
Also published as: CN112283586B

Abstract

The invention relates to the field of liquid conveying pipeline equipment, and discloses a vacuum breaker for a liquid conveying pipeline, which comprises a shell, wherein a limiting pipe is fixedly sleeved at the bottom of the shell, the bottom end of the limiting pipe is sleeved with the top of the water conveying pipeline in a threaded manner, a middle valve body is arranged in the middle of an inner cavity of the shell, a lower valve seat is arranged at the bottom of the middle valve body, a water storage chamber is reserved in the middle of the inner cavity of the middle valve body, and a positioning pipe is fixedly connected in the middle of the top end of the inner cavity of the shell. According to the vacuum breaker for the liquid conveying pipeline, due to the linkage design of the middle valve body, the first piston, the valve rod and the lower valve plate in the shell, when the backflow of terminal liquid is not caused due to insufficient under-pressure in the pipeline, the lower valve plate is still attached to the lower valve seat at the bottom of the middle valve body under the negative pressure suction force of the top of the inner cavity of the positioning pipe to the first piston, so that air is prevented from entering, and the problem that the conveying efficiency of the liquid is further reduced is solved.

Description

Vacuum breaker for liquid conveying pipeline

Technical Field

The invention relates to the field of liquid conveying pipeline equipment, in particular to a vacuum breaker for a liquid conveying pipeline.

Background

The vacuum breaker is widely applied to various systems which are easy to generate vacuum, such as liquid conveying pipelines in the fields of fire fighting, swimming pools, green land sprinkling irrigation, water supply and drainage, dock power plants, metallurgy, shipbuilding and the like, the vacuum breaker can be automatically started to break the vacuum effect when negative pressure is generated or the vacuum is gradually increased due to the running or the stopping of the system in the liquid conveying system to timely suck air into the air protection system, and the pipeline or the container can not be shriveled or dented to protect the safety of equipment

However, when the existing vacuum breaker for the liquid conveying pipeline is used, the backflow of terminal liquid is easily caused due to the fact that the internal pressure of the pipeline is insufficient, air enters the liquid conveying pipeline, the flowing volume of liquid is increased during liquid conveying, the relative flow rate of water and the closing is increased, namely, the friction water head loss is increased, and the problem that the conveying efficiency of the liquid is further reduced when the pressure supply is not changed is caused.

Disclosure of Invention

The invention provides a vacuum breaker for a liquid conveying pipeline, which has the advantage of high liquid conveying efficiency and solves the technical problems in the prior art.

In order to achieve the above purpose, the invention provides the following technical scheme to realize: a vacuum breaker for a liquid conveying pipeline comprises a shell, wherein a limiting pipe is fixedly sleeved at the bottom of the shell, the bottom end of the limiting pipe is sleeved with the top of the water conveying pipeline in a threaded manner, a middle valve body is arranged in the middle of an inner cavity of the shell, a lower valve seat is arranged at the bottom of the middle valve body, a water storage chamber is reserved in the middle of the inner cavity of the middle valve body, a positioning pipe is fixedly connected to the middle of the top end of the inner cavity of the shell, a first piston is movably sleeved in the positioning pipe, a valve rod is fixedly connected to the middle of the bottom end of the first piston, the bottom end of the first piston extends to the position below the lower valve seat at the bottom of the middle valve body and is fixedly connected with a lower valve plate, a floating ring positioned below the middle valve body is movably sleeved in the inner cavity of the shell, the inner ring of the floating, the height value of the floating ring is smaller than that of the lower valve seat, and the top of the outer side of the shell is provided with an air vent.

Preferably, the top of middle valve body still is equipped with the last disk seat of next disk seat symmetry, the top fixedly connected with of casing inner chamber is located the outside second piston of registration arm, and the both sides at registration arm top have all seted up logical groove, the equal fixedly connected with universal driving shaft in both sides of second piston bottom, two the equal fixedly connected with in bottom of universal driving shaft is located the last valve plate of last disk seat top, and the middle part and the valve rod activity of going up the valve plate cup joint, liquid oil is filled in spacing pipe and the communicating inner chamber in registration arm top.

Preferably, the bottom of registration arm, spacing pipe all fixed the cover and is equipped with, the surface seted up the bleeder vent, with first piston, two universal driving shaft equal activity cup joints, the middle part of upper valve plate is equipped with the sealing washer that cup joints with the valve rod activity.

Preferably, a plurality of notches are seted up in the outside of floating ring, and a plurality of notches are symmetrical with the axle center of floating ring, four L templates that pile up into the distribution of bottom fixedly connected with of floating ring, and the base of L template extends to the below and the fixedly connected with magnetic path of lower valve plate, the bottom of lower valve plate is equipped with the magnetic path that is located L template top, and the opposite face magnetic pole of lower valve plate bottom magnetic path and L template top magnetic path is the same.

The invention provides a vacuum breaker for a liquid conveying pipeline, which has the following beneficial effects:

1. this vacuum breaker for liquid conveying pipeline, through middle valve body in the casing, first piston, the linkage design of valve rod and next valve plate, when under-pressure is not enough to arouse terminal liquid backward flow in the pipeline, under the negative pressure suction of positioning tube inner chamber top to first piston, still make the next valve plate laminate with the next disk seat of middle valve body bottom, ensure that the air can not get into, avoided because of the short-term confession of liquid in the pipeline presses inadequately, and make the air get into in the liquid conveying pipeline, when liquid transport, make the liquid flow volume grow, water strengthens with the relative velocity of flow who closes, rub promptly and hinder the head loss increase, when leading to supplying the pressure unchangeable, the problem of the further reduction of the transport efficiency of liquid.

2. When negative pressure vacuum occurs in the conveying pipeline, the lower valve plate overcomes the negative pressure suction force of the top of the inner cavity of the positioning pipe to the first piston, so that the lower valve seat separated from the bottom of the middle valve body moves downwards, external air enters the shell and flows through the middle valve body and the limiting pipe into the pipeline, the vacuum negative pressure environment in the pipeline is damaged, the pipeline and other equipment are prevented from generating phenomena such as shriveling and concave cracking, the safety of the equipment is protected, and the damage of a liquid pressure supply system component is prevented.

3. This vacuum breaker for liquid conveying pipeline, after recovering liquid transportation and supplying pressure, because of the whole top of locating the pipeline of casing, therefore, along with the pipeline, the liquid level in the casing rises, the air is through limiting the pipe in the pipeline, the inner chamber of casing, middle valve body and ventilative mouthful discharge, until the floating ring, lower valve plate is under the buoyancy of liquid, rise to the top of middle valve body, make the moment that lower valve plate laminates the lower disk seat completely, partly water gets into the water storage chamber at middle part of the middle valve body, in order to ensure that air below the lower valve plate completely exhausts the end, avoid remaining air in the pipeline in the liquid transportation process, lead to the emergence of phenomenons such as water hammer, influence the normal transport problem of liquid.

4. This vacuum breaker for liquid conveying pipeline, through the last disk seat of middle valve body, the reservoir chamber design at next disk seat and inner chamber middle part, vacuum negative pressure problem resumes the back appears in the pipeline, the air thoroughly discharges in the air duct of being convenient for, prevent water hammer phenomenon scheduling problem from appearing, and through last disk seat, next disk seat respectively with last valve plate, the laminating of next valve plate, valve body middle part reservoir chamber and external environment in the middle of isolated, thereby avoid the liquid in the reservoir chamber to spill the outside of casing when the exhaust air, and simultaneously, avoided the long-time external air that communicates with each other of liquid in the reservoir chamber, it is rotten easily, when the pipeline backward flow next time, lead to the problem of liquid pollution in the pipeline.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the housing of the structure of FIG. 1 according to the present invention;

FIG. 3 is a schematic bottom view of the positioning tube of the structure of FIG. 1 in accordance with the present invention;

FIG. 4 is a bottom view of the floating ring of the structure of FIG. 1 according to the present invention.

In the figure: 1. a housing; 2. defining a tube; 3. an intermediate valve body; 4. a positioning tube; 401. a through groove; 5. a first piston; 6. a valve stem; 7. a lower valve plate; 8. a floating ring; 801. a notch; 802. an L-shaped plate; 9. a limiting pipe; 10. a second piston; 11. a linkage shaft; 12 an upper valve plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, a vacuum breaker for a liquid conveying pipeline comprises a housing 1, a limiting pipe 2 is fixedly sleeved at the bottom of the housing 1, the bottom end of the limiting pipe 2 is in threaded sleeve with the top of the water conveying pipeline, a middle valve body 3 is arranged in the middle of an inner cavity of the housing 1, a lower valve seat is arranged at the bottom of the middle valve body 3, a water storage chamber is reserved in the middle of the inner cavity of the middle valve body 3, a positioning pipe 4 is fixedly connected to the middle of the top end of the inner cavity of the housing 1, a first piston 5 is movably sleeved inside the positioning pipe 4, a valve rod 6 is fixedly connected to the middle of the bottom end of the first piston 5, the bottom end of the first piston 5 extends to the lower portion of the lower valve seat at the bottom of the middle valve body 3 and is fixedly connected with a lower valve plate 7, a floating ring 8 positioned below the middle valve body 3 is movably sleeved in the inner cavity of the housing 1, the inner, the height value of the floating ring 8 is smaller than that of the lower valve seat, the top of the outer side of the shell 1 is provided with a vent hole, when the liquid of the water pipeline is in a normal conveying pressure state, under the action of the buoyancy of the liquid, the floating ring 8 is positioned at the bottom of the middle valve body 3, the lower valve plate 7 is attached to the lower valve seat at the bottom of the middle valve body 3 and always keeps the state, when the conveying pressure of the liquid in the pipeline is insufficient and strong vacuum negative pressure is not generated, namely the internal under-pressure value of the pipeline is small at the moment and is not enough to cause terminal liquid backflow, at the moment, the floating ring 8 falls down, under the negative pressure suction force of the top of the inner cavity of the positioning pipe 4 to the first piston 5, the lower valve plate 7 is still attached to the lower valve seat at the bottom of the middle valve body 3, the air can not enter, the phenomenon that the air enters the liquid conveying pipeline due, the liquid flow volume is enlarged, the relative flow speed of water and closing is increased, namely the friction head loss is increased, and the liquid conveying efficiency is further reduced when the pressure supply is unchanged, when the liquid conveying in the pipeline is in a problem, and the liquid conveying position and the conveying pipeline are in negative pressure vacuum, under the action of negative pressure, the lower valve plate 7 overcomes the negative pressure suction force on the first piston 5 at the top of the inner cavity of the positioning pipe 4, so that the lower valve plate is moved downwards to be separated from the lower valve seat at the bottom of the middle valve body 3, and at the moment that the lower valve plate 7 is separated from the lower valve seat, the water in the water storage chamber in the inner cavity of the middle valve body 3 flows downwards to drive the lower valve plate 7 to further move downwards, so that the external air enters the shell 1 and flows through the middle valve body 3 and the limiting pipe 2 to enter the pipeline, the vacuum negative pressure environment in the pipeline is damaged, and the pipeline and other equipment, with the safety of protection equipment, prevent the damage of liquid pressure supply system subassembly, and after recovering liquid transportation pressure supply, because of the top of pipeline is located to casing 1 whole, therefore, along with the pipeline, the liquid level in the casing 1 rises, the interior air of pipeline is through injecing pipe 2, the inner chamber of casing 1, middle valve body 3 and ventilative mouthful discharge, until floating ring 8, lower valve plate 7 under the buoyancy of liquid, rise to the top of middle valve body 3, make the moment that lower valve plate 7 laminates the lower disk seat completely, partly water gets into the water storage chamber in middle part of middle valve body 3, in order to ensure that lower valve plate 7 below air completely exhausts the end, avoid the remaining air in the pipeline in the liquid transportation process, lead to the emergence of phenomenons such as water hammer, influence the normal transport problem of liquid.

Wherein, the top of the middle valve body 3 is also provided with an upper valve seat symmetrical to the lower valve seat, the top of the inner cavity of the shell 1 is fixedly connected with a second piston 10 positioned outside the positioning tube 4, both sides of the top of the positioning tube 4 are provided with through grooves 401, both sides of the bottom of the second piston 10 are fixedly connected with universal driving shafts 11, the bottom ends of the two universal driving shafts 11 are fixedly connected with an upper valve plate 12 positioned above the upper valve seat, the middle part of the upper valve plate 12 is movably sleeved with a valve rod 6, the inner cavity communicated with the top of the positioning tube 4 and the limiting tube 9 is filled with liquid oil, when liquid conveying in the pipeline has a problem, and negative pressure vacuum occurs in the liquid conveying part and the conveying pipeline, under the action of negative pressure, the lower valve plate 7 overcomes the negative pressure suction force of the top of the inner cavity of the positioning tube 4 to the first piston 5, thereby moving downwards, at the moment that the lower valve plate 7 is separated from the lower valve seat, the water in the water storage chamber in the inner cavity of the middle valve body 3 flows downwards to drive the lower valve plate 7 to further move downwards, and under the downward impact of the water on the lower valve plate 7, the valve rod 6 drives the first piston 5 to move downwards, so that the

second pistons

10 and 13 drive the upper valve plate 12 to move upwards, the upper valve plate 12 is separated from the upper valve seat at the top of the middle valve body 3, the upper valve seat and the lower valve seat of the middle valve body 3 are opened instantly, so that the air is supplemented into the pipeline at the first time, the influence of pipeline vacuum is eliminated, when the pressure supply of the liquid is recovered, the air is discharged along with the rising of the water level in the shell 1, the lower valve plate 7 is attached to the lower valve seat at the bottom of the middle valve body 3, and the floating ring 8 moves upwards to the bottom of the middle valve body 3, the air is completely discharged, behind the next disk seat of 3 bottoms of valve body in the middle of the laminating of next valve plate 7, last valve plate 12 and universal driving shaft 11, the whole that resets of second piston 10 moves down, valve body 3 top not yet the disk seat in the middle of until the laminating, thereby 3 middle part reservoir chambers and external environment of valve body in the middle of isolated, thereby avoid the liquid in the reservoir chamber outside of spill casing 1 when the exhaust air, and simultaneously, avoided the liquid in the reservoir chamber to communicate with each other with the outside air for a long time, it is rotten easily, when the pipeline backward flow next time, lead to the problem of liquid pollution in the pipeline.

Wherein, the registration arm 4, the equal fixed cover in bottom of spacing pipe 9 is equipped with 13, the bleeder vent has been seted up on the surface of 13, 13 and first piston 5, two universal driving shaft 11 equal activity cup joint, the middle part of upper valve plate 12 is equipped with the sealing washer that cup joints with the activity of valve rod 6, utilize 13 to universal driving shaft 11, the spacing of valve rod 6, ensure universal driving shaft 11 and valve rod 6 steady state when removing, and through the bleeder vent on 13 surfaces, do not influence second piston 10, the removal of first piston 5, make upper valve plate 12 in the middle of the laminating behind the not disk seat at 3 tops of valve body, the reservoir chamber at 3 inner chambers middle parts of valve body carries out effective seal through the sealing washer.

Wherein, the outer side of the floating ring 8 is provided with a plurality of notches 801, the notches 801 are symmetrical with the axis of the floating ring 8, the bottom of the floating ring 8 is fixedly connected with four L-shaped plates 802 which are piled up and distributed, the bottom edge of the L-shaped plate 802 extends to the lower part of the lower valve plate 7 and is fixedly connected with a magnetic block, the bottom of the lower valve plate 7 is provided with the magnetic block positioned above the L-shaped plate 802, and the magnetic poles of the opposite surfaces of the magnetic block at the bottom of the lower valve plate 7 and the magnetic block at the top of the L-shaped plate 802 are the same, so that in the process of rising the liquid level surface in the shell 1, the air above the liquid is upwards discharged through the gap between the notch 801 and the floating ring 8 and the lower valve plate 7, and after the floating ring 8 moves to the top of the middle valve body 3, the repulsive force of the magnetic blocks on the L-shaped plate 802 to the magnetic blocks at the bottom of the lower valve plate 7 is utilized to further improve the bonding strength of the lower valve plate 7 and the lower valve seat at the bottom of the middle valve body 3, so that the sealing effect in the pipeline is guaranteed.

When the vacuum breaker works, firstly, the vacuum breaker is fixedly installed at the top of a liquid conveying pipeline through the limiting pipe 2, when liquid in the water conveying pipeline is in a normal conveying pressure state, under the action of buoyancy of the liquid, the floating ring 8 is positioned at the bottom of the middle valve body 3, the lower valve plate 7 is attached to the lower valve seat at the bottom of the middle valve body 3 and is always kept in the state, when the conveying pressure of the liquid in the pipeline is insufficient and strong vacuum negative pressure is not generated, namely the internal underpressure value of the pipeline is small at the moment and is not enough to cause backflow of terminal liquid, at the moment, the floating ring 8 falls down, and under the negative pressure suction force of the top of the inner cavity of the positioning pipe 4 to the first piston 5, the lower valve plate 7 is still attached to the lower valve seat at the bottom of the middle valve; when a problem occurs in liquid conveying in a pipeline, and negative pressure vacuum occurs at a liquid conveying part and in a conveying pipeline, under the action of negative pressure, the lower valve plate 7 overcomes the negative pressure suction force on the first piston 5 at the top of the inner cavity of the positioning pipe 4, so that the lower valve plate moves downwards to be separated from the lower valve seat at the bottom of the middle valve body 3, and at the moment that the lower valve plate 7 is separated from the lower valve seat, water in the water storage chamber in the inner cavity of the middle valve body 3 flows downwards and impacts the lower valve plate 7 downwards under the action of the water, the valve rod 6 drives the first piston 5 to move downwards, the

second pistons

10 and 13 drive the upper valve plate 12 to move upwards, the upper valve plate 12 is separated from the upper valve seat at the top of the middle valve body 3, and the upper and lower valve seats of the middle valve body 3 are opened instantaneously; after the liquid conveying pressure supply is recovered, along with the rising of liquid level in the pipeline and the shell 1, air in the pipeline is discharged through the limiting pipe 2, the inner cavity of the shell 1, the middle valve body 3 and the ventilation port until the floating ring 8 and the lower valve plate 7 rise to the top of the middle valve body 3 under the buoyancy action of liquid, so that part of water enters the water storage chamber in the middle of the middle valve body 3 at the moment that the lower valve plate 7 is completely attached to the lower valve seat.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a liquid is vacuum breaker for pipeline, includes casing (1), and the bottom of casing (1) is fixed to be cup jointed and is limited tub (2), and the bottom of limiting tub (2) cup joints its characterized in that with the top screw thread of pipeline: the middle part of the inner cavity of the shell (1) is provided with a middle valve body (3), the bottom of the middle valve body (3) is provided with a lower valve seat, the middle part of the inner cavity of the middle valve body (3) is reserved with a water storage chamber, the middle part of the top end of the inner cavity of the shell (1) is fixedly connected with a positioning pipe (4), the inner part of the positioning pipe (4) is movably sleeved with a first piston (5), the middle part of the bottom end of the first piston (5) is fixedly connected with a valve rod (6), the bottom end of the first piston (5) extends to the lower part of the bottom of the middle valve body (3) and is fixedly connected with a lower valve plate (7), the inner cavity of the shell (1) is movably sleeved with a floating ring (8) positioned below the middle valve body (3), the inner ring of the floating ring (8) is not contacted with the inner ring of the lower valve plate (7), and the, the height value of the floating ring (8) is smaller than that of the lower valve seat, and the top of the outer side of the shell (1) is provided with an air vent.

2. The vacuum breaker for liquid conveying pipeline as claimed in claim 1, wherein: the top of middle valve body (3) still is equipped with the last disk seat of next disk seat symmetry, the top fixedly connected with of casing (1) inner chamber is located outside second piston (10) of registration arm (4), and the both sides at registration arm (4) top have all seted up logical groove (401), the equal fixedly connected with universal driving shaft (11) in both sides of second piston (10) bottom, two the equal fixedly connected with in bottom of universal driving shaft (11) is located last valve plate (12) of last disk seat top, and the middle part of last valve plate (12) cup joints with valve rod (6) activity, fill liquid oil in spacing pipe (9) and the communicating inner chamber in registration arm (4) top.

3. The vacuum breaker for liquid conveying pipeline as claimed in claim 2, wherein: the bottom of registration arm (4), spacing pipe (9) is all fixed the cover and is equipped with (13), the bleeder vent has been seted up on the surface of (13), (13) and first piston (5), two universal driving shafts (11) equal activity cup joint, the middle part of upper valve plate (12) is equipped with the sealing washer that cup joints with valve rod (6) activity.

4. The vacuum breaker for liquid conveying pipeline as claimed in claim 1, wherein: a plurality of notches (801) have been seted up in the outside of floating ring (8), and a plurality of notches (801) are symmetrical with the axle center of floating ring (8), four L template (802) of piling up the distribution of bottom fixedly connected with of floating ring (8), and the base of L template (802) extends to the below and the fixedly connected with magnetic path of lower valve plate (7), the bottom of lower valve plate (7) is equipped with the magnetic path that is located L template (802) top, and the opposite face magnetic pole of lower valve plate (7) bottom magnetic path and L template (802) top magnetic path is the same.