One-way exhaust valve with drainage function

Abstract

The utility model relates to the technical field of hydraulic engineering, 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 utility model relates to the technical field of water conservancy projects, in particular to a one-way exhaust valve with a drainage function. Background Art

[0002] Building a plain reservoir is one of the important engineering measures to solve the production and domestic water use in plain areas with water shortage. Plain reservoirs generally utilize the topography and are built on low-lying lands. The strata in these places are generally formed by years of scouring and sediment deposition of ancient river channels, and their permeability coefficient is relatively large. Engineering measures need to be taken for anti-seepage so that the plain reservoir does not leak and can play its normal water storage function. Currently, there are two basic anti-seepage schemes: vertical anti-seepage and horizontal anti-seepage. Among them, horizontal anti-seepage is commonly used when there is no water-proof layer in the shallow layer of the foundation, and the way of laying anti-seepage membranes (usually plastic membranes) on the entire reservoir bottom and dam slope is adopted. However, due to reasons such as the change of the groundwater level and the compression of the foundation, gas will accumulate under the membrane. When the gas pressure exceeds the tensile capacity of the anti-seepage membrane, the anti-seepage membrane will rupture, forming a water leakage channel, resulting in the loss of water resources and the reservoir losing its water storage function. Moreover, the leakage of reservoir water will cause the groundwater level around the reservoir to rise, resulting in the marshland phenomenon of the surrounding land, which will further affect agricultural production and the living environment of local residents. To solve the harm caused by the gas under the membrane, a certain number of one-way valves are usually set on the anti-seepage membrane to release the gas pressure, thereby protecting the anti-seepage membrane from being damaged and enabling the project to operate safely.

[0003] The function of the one-way valve is to discharge the gas accumulated under the anti-seepage membrane after the reservoir is built and filled with water, maintain the pressure balance on both 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 closes under the action of water pressure to prevent water from entering the foundation through the one-way valve and forming leakage. During the process of laying the membrane in the reservoir, due to reasons such as the high groundwater level and the need for excavation in the reservoir area, the working surface where the anti-seepage membrane is located is generally below the groundwater level, so the dewatering process must be carried out to lower the groundwater level to a certain depth below the construction working surface to ensure the construction quality of the anti-seepage membrane and the cushion layer. However, the conventional dewatering methods mainly include open drainage, tube wells and light well points, etc. However, there are still great drawbacks in the actual construction process. The main reason is that the area of the plain reservoir is relatively large, and the dewatering equipment is under the already laid anti-seepage membrane to ensure that the groundwater level in the place where the anti-seepage membrane has been laid maintains the designed buried depth, so as to ensure that the part where the membrane laying construction has been completed is not damaged by the groundwater level. However, after the construction of the whole reservoir anti-seepage membrane is completed, it is difficult to deal with various dewatering facilities (such as dewatering wells, drainage pumps, etc.) under the membrane, and the quality of the treatment is difficult to control, which is very easy to form quality hidden dangers. If these dewatering facilities are not dealt with, these hidden facilities buried underground cannot be reused, which not only causes waste but also is a potential hidden danger, and once problems occur in the later stage, they will be impossible to handle. Content of the Utility Model

[0004] In order to make up for the deficiencies of the prior art, the utility model provides a one-way exhaust valve with a drainage function. Its structural design is reasonable and the operation is convenient. During the construction of the anti-seepage membrane in the plain reservoir, the precipitation process can be carried out to lower the groundwater level below the anti-seepage membrane, so as to ensure the smooth construction of the leveling layer, membrane laying, and weight pressing layer. After the precipitation process is completed, not only can the precipitation equipment be easily taken out, improving its reuse rate, but also the anti-seepage membrane will not be damaged, and the potential hidden danger caused by burying deep underground to the anti-seepage membrane is solved. At the same time, during the normal operation of the exhaust process after the construction is completed, the gas pressure is effectively prevented from being too large, which may cause the anti-seepage membrane to tear, ensuring the normal water storage function of the reservoir, thereby improving the construction quality and the operation safety in the later stage of the project, and solving the problems existing in the prior art.

[0005] The technical solution adopted by the utility model to solve the above technical problems is:

[0006] A one-way exhaust valve with a drainage function includes an upper riser and a one-way valve body provided at the top of the upper riser. At the bottom of the upper riser, there is an upper flange that abuts against the anti-seepage membrane. Below the anti-seepage membrane at the position corresponding to the upper riser, there is a lower riser. At the top of the lower riser, there is a lower flange. The upper flange is connected to the lower flange by a plurality of bolts. There is a through hole in the anti-seepage membrane at the position corresponding to the upper riser. There are a plurality of water-permeable holes on the side wall of the lower riser. Along the circumferential direction of the side wall of the lower riser, there are a plurality of lower branch pipes connected to it. Blind pipes are respectively clamped in each lower branch pipe. There is an upper branch pipe connected to the side wall of the upper riser. At the end of the upper branch pipe, there is a cover. A drainage mechanism is provided in the upper riser, upper branch pipe, and lower riser.

[0007] Optionally, the drainage mechanism includes a jet pump provided at the bottom inside the lower riser. The intake hose and the outlet hose connected to the jet pump extend outwards through the lower riser, upper riser, and upper branch pipe respectively.

[0008] Optionally, the jet pump includes a vertically arranged water outlet pipe. The water outlet pipe includes a diffusion section at the upper part, a throat section in the middle, and an inlet section at the lower part. The outlet hose is connected to the outer end of the diffusion section of the water outlet pipe. An intake pipe is provided on one side of the water outlet pipe. The intake pipe is connected to the throat section of the water outlet pipe through a connecting plate. The lower end of the intake pipe bends upwards and extends into the inlet section of the water outlet pipe. The intake hose is connected to the upper end of the intake pipe.

[0009] Optionally, a weight pressing 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.

[0010] Optionally, filter materials are filled in the leveling layer on the outside of the lower riser and on the outside of each blind pipe.

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

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

[0013] The utility model adopts the above technical solution, and has the following advantages: reasonable structural design, convenient operation, can carry out the precipitation process during the construction of the reservoir anti-seepage membrane, lower the groundwater level below the anti-seepage membrane, so as to ensure the smooth construction of the leveling cushion layer, membrane laying, and weight pressing layer; after the precipitation process is completed, not only can the precipitation equipment be easily taken out, improving its reuse rate, but also the anti-seepage membrane will not be damaged, and the potential hidden danger caused by burying deep underground to the anti-seepage membrane is solved; at the same time, after the construction is completed, the exhaust process is normally carried out, effectively preventing the anti-seepage membrane from being torn due to excessive gas pressure, ensuring the normal water storage function of the reservoir, thereby improving the construction quality and the operation safety in the later stage of the project. Brief Description of the Drawings

[0014] Figure 1 It is a sectional structural schematic diagram of the utility model;

[0015] Figure 2 It is a sectional structural schematic diagram of the ejector;

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

[0017] In the figure, 1, upper riser pipe; 2, one-way valve body; 3, anti-seepage membrane; 4, upper flange; 5, lower riser pipe; 6, lower flange; 7, bolt; 8, through hole; 9, permeable hole; 10, lower branch pipe; 11, blind pipe; 12, upper branch pipe; 13, cover; 14, ejector; 1401, water 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 pressing layer; 18, foundation; 19, leveling layer; 20, filter material; 21, filter net. Detailed Description of the Preferred Embodiments

[0018] In order to clearly illustrate the technical features of the present solution, the present utility model will be elaborated in detail below through specific embodiments in combination with the drawings. In the following description, many specific details are set forth in order to fully understand the present application. However, the present application may 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 orientation or positional relationship indicated by terms such as "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is 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. Therefore, it should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality" is two or more, unless otherwise specifically and clearly defined.

[0020] In the present application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances. In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions 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] As Figures 1-3 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 provided at the top of the upper riser 1. An upper flange 4 is provided at the bottom of the upper riser 1 and abuts against an anti-seepage membrane 3. A lower riser 5 is provided below the anti-seepage membrane 3 corresponding to the position of the upper riser 1. A lower flange 6 is provided 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 provided in the anti-seepage membrane 3 corresponding to the position of the upper riser 1. A plurality of water permeable holes 9 are provided on the side wall of the lower riser 5. A plurality of lower branch pipes 10 communicating with the lower riser 5 are provided along the circumferential direction of the side wall of the lower riser 5. A blind pipe 11 is respectively clamped in each lower branch pipe 10. An upper branch pipe 12 communicating with the upper riser 1 is provided on the side wall of the upper riser 1. A cover 13 is provided at the end of the upper branch pipe 12. A drainage mechanism is provided in the upper riser 1, the upper branch pipe 12 and the lower riser 5.

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

[0023] Optionally, the jet pump 14 includes a vertically disposed water outlet pipe 1401. The water outlet pipe 1401 includes a diffuser section 14011 at the upper part, a throat section 14012 in the middle and an inlet section 14013 at the lower part. The water outlet hose 16 is connected to the outer end of the diffuser section 14011 of the water outlet pipe 1401. An air inlet pipe 1402 is disposed 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 upwards and extends into the inlet section 14013 of the water outlet pipe 1401. The air inlet hose 15 is connected to the upper end of the air inlet pipe 1402.

[0024] Optionally, a weighting layer 17 is laid on the anti-seepage membrane 3 below the upper branch pipe 12; a leveling layer 19 is provided between the anti-seepage membrane 3 and the foundation 18. The weighting layer 17 presses on the anti-seepage membrane 3, which can further protect the anti-seepage membrane 3 and can also be called a protective layer; the leveling layer 19 is laid on the foundation 18. On the one hand, it can reduce the blockage of sediment in each water permeable hole 9 of the lower riser 5, and on the other hand, it improves the supporting effect of the foundation 18 on the anti-seepage membrane 3.

[0025] Optionally, filter materials 20 are filled in the leveling layer 19 outside the lower riser 5 and outside each blind pipe 11. The filter materials 20 can filter out the sediment mixed in the water, prevent the sediment from blocking the lower riser 5 and the blind pipes 11, improve the water collection function of the lower riser 5 and the blind pipes 11, and enable the groundwater to flow into the lower riser 5 more easily through the blind pipes 11 or the water permeable holes 9 of the lower riser 5.

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

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

[0028] Before using this device, open the cover 13 and connect the air intake hose 15 to the air compressor. During the construction of laying the anti-seepage membrane 3 in the plain reservoir, groundwater enters the lower vertical pipe 5 through the blind pipe 11 and the water permeable holes 9. Then start the air compressor, and the air compressor injects compressed air with a certain pressure into the air inlet pipe 1402 through the air intake hose 15. The compressed air is sprayed upward into the inlet section 14013 of the water outlet pipe 1401 from the lower end of the air inlet pipe 1402, and is discharged into the water outlet pipe 1401 through the throat section 14012 and the diffusion section 14011 in sequence, and finally is discharged outward through the water outlet hose 16. During this process, a negative pressure is formed in the inlet section 14013, forcing the inlet section 14013 to suck the groundwater in the lower vertical pipe 5 upward and discharge it into the throat section 14012, forming a gas-liquid two-phase flow, which is discharged outward through the water outlet hose 16 together. Finally, the purpose of smoothly discharging the groundwater outward is achieved. After the anti-seepage membrane 3 is laid, by pulling the air intake hose 15 and the water outlet hose 16, the ejector 14 can be taken out smoothly through the lower vertical pipe 5, the upper vertical pipe 1, and the upper branch pipe 12 in sequence. Then use the cover 13 to close the end of the upper limb pipe 12 for sealing treatment. Through the ejector 14, the smooth construction of the leveling cushion layer, the film laying, and the weight pressing layer can be ensured.

[0029] After the plain reservoir is built and stores water, the gas accumulated under the anti-seepage membrane 3 enters the lower vertical pipe 5 through the blind pipe 11 and the water permeable holes 9, and enters the upper vertical pipe 1 through the through hole 8 of the anti-seepage membrane 3. Finally, it is discharged outward through the one-way valve body 2, thus effectively maintaining the pressure balance on both sides of the anti-seepage membrane and ensuring that the anti-seepage membrane 3 is not torn to cause engineering accidents. When the gas is released, the one-way valve body 2 closes 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 different quantities of this device can be selected according to construction needs to meet the gas exhaust requirements of the reservoir. Its structural design is reasonable and the operation is convenient. It can carry out the precipitation process during the construction of the reservoir anti-seepage membrane, lower the groundwater level below the anti-seepage membrane, thus ensuring the smooth construction of the leveling layer, the film laying, and the weight pressing layer; after the precipitation process is completed, not only can the precipitation equipment be easily taken out, improving its reuse rate, but also the anti-seepage membrane will not be damaged, and the potential hidden danger caused by burying deep underground to the anti-seepage membrane is solved; at the same time, during the normal operation of the exhaust process after the construction is completed, it effectively prevents the anti-seepage membrane from being torn due to excessive gas pressure, ensuring the normal water storage function of the reservoir, thus improving the construction quality and the operation safety in the later stage 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 limiting it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention; for those skilled in the art of this technology, any alternative improvement or transformation made to the embodiments of the present invention falls within the protection scope of the present invention.

[0031] Those details not described in the present invention are all well-known technologies to those skilled in the art of this technology.

Claims

1. A one-way exhaust valve with a drainage function, characterized in that, It includes an upper riser pipe and a check valve body arranged at the top of the upper riser pipe. An upper flange abutted against the anti-seepage membrane is provided at the bottom of the upper riser pipe. A lower riser pipe is provided below the anti-seepage membrane at the position corresponding to the upper riser pipe. A lower flange is provided at the top of the lower riser pipe. The upper flange is connected to the lower flange by a plurality of bolts. A through hole is provided in the anti-seepage membrane at the position corresponding to the upper riser pipe. A plurality of water permeable holes are provided on the side wall of the lower riser pipe. A plurality of lower branch pipes communicating with it are provided on the side wall of the lower riser pipe along its circumferential direction. Blind pipes are respectively clamped in each lower branch pipe; an upper branch pipe communicating with it is provided on the side wall of the upper riser pipe. A cover is provided at the end of the upper branch pipe. A drainage mechanism is provided in the upper riser pipe, the upper branch pipe and the lower riser pipe.

2. The one-way exhaust valve with a drainage function according to claim 1, characterized in that, The drainage mechanism includes a jet pump arranged inside the bottom of the lower riser pipe. An air inlet hose and a water outlet hose connected to the jet pump extend outwards through the lower riser pipe, the upper riser pipe and the upper branch pipe respectively.

3. The one-way exhaust valve with a drainage function according to claim 2, characterized in that, The jet pump includes a vertically arranged water outlet pipe. The water outlet pipe includes a diffusion section at the upper part, a throat section in the middle and an inlet section at the lower part. 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 bends upwards 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. The one-way exhaust valve with a drainage function according to claim 1, characterized in that, A weighting 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. The one-way exhaust valve with a drainage function according to claim 4, characterized in that, Filter materials are filled in the leveling layer outside the lower riser pipe and outside each blind pipe.

6. The one-way exhaust valve with a drainage function according to claim 1, characterized in that, A filter net is wound around the outer wall of the lower riser pipe.

7. The one-way exhaust valve with a drainage function according to claim 1, characterized in that The outer end of the upper branch pipe is arranged to incline upwards.

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