One-way exhaust valve with drainage function

Abstract

The invention relates to the technical field of water conservancy projects, in particular to a one-way exhaust valve with a drainage function. The one-way valve comprises an upper vertical pipe and a one-way valve body arranged at the top of the upper vertical pipe, an upper flange abutting against an impermeable film is arranged at the bottom of the upper vertical pipe, a lower vertical pipe is arranged below the impermeable film corresponding to the position of the upper vertical pipe, a lower flange is arranged at the top of the lower vertical pipe, and the upper flange is connected with the lower flange through a plurality of bolts. The device is reasonable in structural design, and can carry out a precipitation process during the construction period of the impermeable membrane of the plain reservoir, so that the underground water level is reduced to be below the impermeable membrane, and smooth construction of a leveling layer, a membrane paving layer and a ballasting layer is ensured; after the precipitation process is completed, the precipitation equipment can be easily taken out, the repeated utilization rate of the precipitation equipment is increased, the anti-seepage film cannot be damaged, potential hazards caused by deep burying underground to the anti-seepage film are avoided, and the problems existing in the prior art are solved.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy engineering, and in particular to a one-way exhaust valve with a drainage function. Background Art

[0002] The construction of plain reservoirs is one of the important engineering measures to solve the problem of water shortage in plain areas for production and living. Plain reservoirs are generally built on low-lying land using topography. The strata in these places are generally formed by years of scouring and sedimentation of ancient river channels. Their permeability coefficients are relatively large, and engineering measures must be taken to prevent seepage in order to prevent the plain reservoirs from leaking and to play their normal water storage function. At present, there are two basic anti-seepage schemes: vertical anti-seepage and horizontal anti-seepage. Among them, horizontal anti-seepage is often used in the absence of a water-proof layer in the shallow foundation layer, and an anti-seepage membrane (usually a plastic membrane) is laid on the entire reservoir bottom and dam slope. However, due to changes in groundwater levels and compression of the foundation, gas will gather under the membrane. When the gas pressure exceeds the tensile strength of the anti-seepage membrane, the anti-seepage membrane will rupture, forming a leakage channel, causing water resource loss and making the reservoir lose its water storage function. In addition, the leakage of reservoir water will cause the groundwater level around the reservoir to rise, causing the surrounding land to become swampy, which in turn affects agricultural production and the living environment of local residents. In order to solve the hazards caused by the gas under the membrane, it is usually necessary to install a certain number of one-way valves on the anti-seepage membrane to release the gas pressure, thereby protecting the anti-seepage membrane from damage and ensuring the safe operation of the project.

[0003] The function of the one-way valve is to discharge the gas gathered under the anti-seepage membrane after the reservoir is built and water is stored, maintain the pressure balance on the upper and lower sides of the anti-seepage membrane, so as to ensure that the anti-seepage membrane is not torn, and when the gas is released, the one-way valve is closed under the action of water pressure to prevent water from entering the foundation through the one-way valve and forming leakage. In the process of reservoir membrane laying construction, due to the high groundwater level and the need to excavate the reservoir area, the working surface where the anti-seepage membrane is located is generally below the groundwater level, so it is necessary to carry out a precipitation process to reduce the groundwater level to a certain depth below the construction working surface to ensure the construction quality of the anti-seepage membrane and cushion layer. However, conventional precipitation methods mainly include open drainage, pipe wells and light well points. However, there are still major drawbacks in the actual construction process. The main reason is that the area of ​​plain reservoirs is large, and the precipitation equipment is under the laid anti-seepage membrane to ensure that the groundwater level in the place where the anti-seepage membrane has been laid maintains the required buried depth, so as to ensure that the part where the membrane has been laid is not damaged by the groundwater level. However, after the construction of the whole reservoir anti-seepage membrane is completed, the various precipitation facilities under the membrane (such as precipitation wells, drainage pumps, etc.) are difficult to handle, and the quality of the treatment is difficult to control, which is very likely to cause quality risks. If these precipitation facilities are not handled, these hidden facilities buried underground cannot be reused, which not only causes waste, but also is a potential hidden danger. Once a problem occurs later, it will be impossible to deal with it. Summary of the invention

[0004] In order to make up for the deficiencies of the prior art, the present invention provides a one-way exhaust valve with a drainage function. The valve has a reasonable structural design and is easy to operate. It can perform a precipitation process during the construction of the anti-seepage membrane of a plain reservoir to lower the groundwater level to below the anti-seepage membrane, thereby ensuring the smooth construction of the leveling layer, membrane laying, and weighting layer. After the precipitation process is completed, not only can the precipitation equipment be easily taken out to improve its reuse rate, but the anti-seepage membrane will not be damaged, and the potential hidden dangers of the anti-seepage membrane caused by deep burial underground can be solved. At the same time, the exhaust process is operated normally after the construction is completed, which effectively prevents the anti-seepage membrane from being torn due to excessive gas pressure, thereby ensuring the normal water storage function of the reservoir, thereby improving the construction quality and the safety of the later operation of the project, and solving the problems existing in the prior art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] A one-way exhaust valve with a drainage function comprises an upper riser and a one-way valve body arranged on the top of the upper riser, an upper flange abutting against an impermeable membrane is arranged at the bottom of the upper riser, a lower riser is arranged below the impermeable membrane corresponding to the position of the upper riser, a lower flange is arranged at the top of the lower riser, the upper flange is connected to the lower flange by a plurality of bolts, a through hole is arranged on the impermeable membrane corresponding to the position of the upper riser, a plurality of water-permeable holes are arranged on the side wall of the lower riser, a plurality of lower branch pipes connected thereto are arranged on the side wall of the lower riser along the circumferential direction thereof, and a blind pipe is respectively arranged in each of the lower branch pipes; an upper branch pipe connected thereto is arranged on the side wall of the upper riser, a sealing cover is arranged at the end of the upper branch pipe, and a drainage mechanism is arranged in the upper riser, the upper branch pipe and the lower riser.

[0007] Optionally, the drainage mechanism includes an ejector arranged at the bottom of the lower vertical pipe, and the air inlet hose and the water outlet hose connected to the ejector extend outward through the lower vertical pipe, the upper vertical pipe and the upper branch pipe respectively.

[0008] Optionally, the ejector includes a vertically arranged water outlet pipe, the water outlet pipe includes an upper diffusion section, a middle throat section and a lower inlet section, the water outlet hose is connected to the outer end of the diffusion section of the water outlet pipe, an air inlet pipe is provided on one side of the water outlet pipe, the air inlet pipe is connected to the throat section of the water outlet pipe through a connecting plate, the lower end of the air inlet pipe is bent upward and extends into the inlet section of the water outlet pipe, and the air inlet hose is connected to the upper end of the air inlet pipe.

[0009] Optionally, a weight layer is laid on the anti-seepage membrane below the upper branch pipe; and a leveling layer is provided between the anti-seepage membrane and the foundation.

[0010] Optionally, filter material is filled in the leveling layer outside the lower riser and outside each blind pipe.

[0011] Optionally, a filter screen is wound around the outer wall of the lower riser.

[0012] Optionally, the outer end of the upper branch pipe is arranged to be inclined upward.

[0013] The present invention adopts the above technical scheme, which has the advantages of reasonable structural design and convenient operation. It can carry out the precipitation process during the construction of the reservoir anti-seepage membrane to lower the groundwater level to below the anti-seepage membrane, thereby ensuring the smooth construction of the leveling cushion layer, membrane laying and weight layer; after the precipitation process is completed, not only can the precipitation equipment be easily taken out to improve its reuse rate, but the anti-seepage membrane will not be damaged, and the potential hidden dangers of the anti-seepage membrane caused by deep burial underground are solved; at the same time, the exhaust process is operated normally after the construction is completed, which effectively prevents the tearing of the anti-seepage membrane due to excessive gas pressure, ensures the normal water storage function of the reservoir, and thus improves the construction quality and the safety of the later operation of the project. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0015] Figure 2 is a schematic diagram of the cross-sectional structure of the ejector;

[0016] Figure 3 It is the structural schematic diagram of the anti-seepage membrane;

[0017] In the figure, 1. upper riser; 2. one-way valve body; 3. anti-seepage membrane; 4. upper flange; 5. lower riser; 6. lower flange; 7. bolts; 8. through holes; 9. water holes; 10. lower branch pipe; 11. blind pipe; 12. upper branch pipe; 13. cover; 14. ejector; 1401. outlet pipe; 14011. diffusion section; 14012. throat section; 14013. inlet section; 1402. air inlet pipe; 1403. connector; 15. air inlet hose; 16. water outlet hose; 17. weight layer; 18. foundation; 19. leveling layer; 20. filter material; 21. filter screen. DETAILED DESCRIPTION

[0018] In order to clearly illustrate the technical features of the present solution, the present invention is described in detail below through specific implementation methods and in conjunction with the accompanying drawings. In the following description, many specific details are described to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0019] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0020] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, they can be fixedly connected, detachably connected, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0021] like Figure 1-3 As shown, in this embodiment, a one-way exhaust valve with a drainage function includes an upper riser 1 and a one-way valve body 2 arranged on the top of the upper riser 1, an upper flange 4 abutting against an impermeable membrane 3 is arranged at the bottom of the upper riser 1, a lower riser 5 is arranged below the impermeable membrane 3 corresponding to the position of the upper riser 1, a lower flange 6 is arranged at the top of the lower riser 5, the upper flange 4 is connected to the lower flange 6 by a plurality of bolts 7, a through hole 8 is arranged on the impermeable membrane 3 corresponding to the position of the upper riser 1, a plurality of water-permeable holes 9 are arranged on the side wall of the lower riser 5, a plurality of lower branch pipes 10 connected thereto are arranged on the side wall of the lower riser 5 along the circumferential direction thereof, and a blind pipe 11 is respectively clamped in each lower branch pipe 10; an upper branch pipe 12 connected thereto is arranged on the side wall of the upper riser 1, a sealing cover 13 is arranged at the end of the upper branch pipe 12, and a drainage mechanism is arranged in the upper riser 1, the upper branch pipe 12 and the lower riser 5.

[0022] Optionally, the drainage mechanism includes an ejector 14 disposed at the bottom of the lower riser 5, and an air inlet hose 15 and a water outlet hose 16 connected to the ejector 14 extend outward through the lower riser 5, the upper riser 1 and the upper branch pipe 12 respectively.

[0023] Optionally, the ejector 14 includes a vertically arranged water outlet pipe 1401, the water outlet pipe 1401 includes an upper diffusion section 14011, a middle throat section 14012 and a lower inlet section 14013, the water outlet hose 16 is connected to the outer end of the diffusion section 14011 of the water outlet pipe 1401, an air inlet pipe 1402 is provided on one side of the water outlet pipe 1401, the air inlet pipe 1402 is connected to the throat section 14012 of the water outlet pipe 1401 through a connecting plate 1403, the lower end of the air inlet pipe 1402 is bent upward and extends into the inlet section 14013 of the water outlet pipe 1401, and the air inlet hose 15 is connected to the upper end of the air inlet pipe 1402.

[0024] Optionally, a weight layer 17 is laid on the impermeable membrane 3 below the upper branch pipe 12; a leveling layer 19 is provided between the impermeable membrane 3 and the foundation 18. The weight layer 17 is pressed on the impermeable membrane 3, which can further protect the impermeable membrane 3, and can also be called a protective layer; the leveling layer 19 is laid on the foundation 18, which can reduce the clogging of the water permeable holes 9 of the lower riser 5 by sediment on the one hand, and improve the supporting effect of the foundation 18 on the impermeable membrane 3 on the other hand.

[0025] Optionally, filter material 20 is filled in the leveling layer 19 outside the lower riser 5 and outside each blind pipe 11. The filter material 20 can filter out the silt mixed in the water, prevent the silt from clogging the lower riser 5 and the blind pipe 11, improve the water collection function of the lower riser 5 and the blind pipe 11, and make the groundwater flow into the lower riser 5 more easily through the blind pipe 11 or the water permeable hole 9 of the lower riser 5.

[0026] Optionally, a filter screen 21 is wound around the outer wall of the lower riser 5. The filter screen 21 further filters impurities such as silt in the groundwater to prevent the silt from entering the lower riser 5.

[0027] Optionally, the outer end of the upper branch pipe 1 is arranged to be tilted upwards. The tilted upward angle setting is more conducive to the construction workers to conveniently take out the drainage mechanism.

[0028] Before using the device, the cover 13 is opened and the air intake hose 15 needs to be connected to the air compressor. During the construction of the impermeable membrane 3 in the plain reservoir, groundwater enters the lower riser 5 through the blind pipe 11 and the water permeable hole 9. When the air compressor is started again, the air compressor injects compressed air with a certain pressure into the air intake pipe 1402 through the air intake hose 15. The compressed air passes through the lower end of the air intake pipe 1402 and sprays upward into the inlet section 14013 of the outlet pipe 1401, and is discharged into the outlet pipe 1401 through the throat section 14012 and the diffusion section 14011 in turn, and finally discharged outward through the outlet hose 16. In this process, negative pressure is formed in the inlet section 14013, forcing the inlet section 14013 to suck the groundwater in the lower riser 5 upward and discharge it into the throat section 14012, forming a gas-liquid two-phase flow, and discharged outward from the outlet hose 16 together. Finally, the purpose of smoothly discharging groundwater to the outside is achieved. After the anti-seepage membrane 3 is laid, the air inlet hose 15 and the water outlet hose 16 are pulled to allow the ejector 14 to be taken out smoothly through the lower riser 5, the upper riser 1, and the upper branch pipe 12 in sequence, and then the cover 13 is closed on the end of the upper limb pipe 12 for sealing. The ejector 14 can ensure the smooth construction of the leveling cushion layer, membrane laying, and weight layer.

[0029] After the Pingyuan Reservoir is built and filled with water, the gas gathered under the impermeable membrane 3 enters the lower riser 5 through the blind pipe 11 and the water-permeable hole 9, and enters the upper riser 1 through the through hole 8 of the impermeable membrane 3, and finally, is discharged outward through the one-way valve body 2, thereby effectively maintaining the pressure balance on the upper and lower sides of the impermeable membrane, ensuring that the impermeable membrane 3 is not torn and causes engineering accidents. When the gas is released, the one-way valve body 2 is closed under the action of water pressure, and water cannot enter the foundation through the one-way valve body 2 to cause leakage. It should be noted that the device can be selected in different quantities according to construction needs to meet the needs of reservoir exhaust. It has a reasonable structural design and is easy to operate. It can carry out a precipitation process during the construction of the reservoir anti-seepage membrane to lower the groundwater level to below the anti-seepage membrane, thereby ensuring the smooth construction of the leveling layer, membrane laying, and weighting layer. After the precipitation process is completed, not only can the precipitation equipment be easily taken out to improve its reuse rate, but it will not damage the anti-seepage membrane and solves the potential hidden dangers of the anti-seepage membrane caused by deep burial underground. At the same time, after the construction is completed, the exhaust process is normally operated to effectively prevent the anti-seepage membrane from being torn due to excessive gas pressure, thereby ensuring the normal water storage function of the reservoir, thereby improving the construction quality and the safety of the later operation of the project, and solving the problems existing in the prior art.

[0030] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention. For those skilled in the art, any replacement, improvement or change made to the implementation mode of the present invention falls within the protection scope of the present invention.

[0031] The matters not described in detail in the present invention are all known technologies to those skilled in the art.

Claims

1. A one-way exhaust valve with drainage function, characterized in that: It comprises an upper riser and a one-way valve body arranged on the top of the upper riser, an upper flange abutting against an impermeable membrane is arranged at the bottom of the upper riser, a lower riser is arranged below the impermeable membrane corresponding to the position of the upper riser, a lower flange is arranged at the top of the lower riser, the upper flange is connected to the lower flange by a plurality of bolts, a through hole is arranged on the impermeable membrane corresponding to the position of the upper riser, a plurality of water-permeable holes are arranged on the side wall of the lower riser, a plurality of lower branch pipes connected thereto are arranged on the side wall of the lower riser along the circumferential direction thereof, and a blind pipe is respectively arranged in each of the lower branch pipes; an upper branch pipe connected thereto is arranged on the side wall of the upper riser, a sealing cover is arranged at the end of the upper branch pipe, and a drainage mechanism is arranged in the upper riser, the upper branch pipe and the lower riser.

2. A one-way exhaust valve with drainage function according to claim 1, characterized in that: The drainage mechanism comprises an ejector arranged at the bottom of the lower vertical pipe, and an air inlet hose and a water outlet hose connected to the ejector extend outwards through the lower vertical pipe, the upper vertical pipe and the upper branch pipe respectively.

3. A one-way exhaust valve with drainage function according to claim 2, characterized in that: The ejector includes a vertically arranged water outlet pipe, which includes an upper diffusion section, a middle throat section and a lower inlet section. The water outlet hose is connected to the outer end of the diffusion section of the water outlet pipe. An air inlet pipe is provided on one side of the water outlet pipe. The air inlet pipe is connected to the throat section of the water outlet pipe through a connecting plate. The lower end of the air inlet pipe is bent upward and extends into the inlet section of the water outlet pipe. The air inlet hose is connected to the upper end of the air inlet pipe.

4. A one-way exhaust valve with drainage function according to claim 1, characterized in that: A weight layer is laid on the anti-seepage membrane below the upper branch pipe; a leveling layer is provided between the anti-seepage membrane and the foundation.

5. A one-way exhaust valve with drainage function according to claim 4, characterized in that: The leveling layer on the outside of the lower riser and each blind pipe is filled with filter material.

6. A one-way exhaust valve with drainage function according to claim 1, characterized in that: Wind a filter screen around the outer wall of the lower vertical pipe.

7. A one-way exhaust valve with drainage function according to claim 1, characterized in that: The outer end of the upper branch pipe is arranged to be inclined upward.

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