Sand washing drainage device

Abstract

The utility model belongs to the technical field of pipeline drainage / drainage, and particularly discloses a sand washing drainage device which comprises a main drainage pipe and a throttling drainage pipe. The main water drainage pipe is used for being communicated with a low-concave node of a water conveying and distributing pipeline to form a main water drainage channel, and a water drainage opening of the main water drainage pipe is provided with a tail end switching device used for opening and closing the water drainage opening; the throttling water drainage pipe is connected to the periphery of the downstream of the main water drainage pipe in a bypass mode to form a branch water drainage channel, the pipe diameter of the throttling water drainage pipe is smaller than that of the main water drainage pipe, and the throttling water drainage pipe is connected with an adjusting valve used for adjusting the water drainage flow of the branch water drainage channel in series. And a filter is connected in series in the main water drain pipe or the throttling water drain pipe and is positioned at the upstream of the regulating valve. According to the sand washing drainage device, pipeline drainage / drainage can be safely and stably carried out under the condition of high pressure difference.

Description

Technical Field

[0001] The present application belongs to the technical field of pipeline drainage, and more specifically, relates to a sand flushing and drainage device. Background Art

[0002] At present, in long-distance water distribution pipelines, isolation valves / inspection valves are often installed in sections of the pipelines, air valves are installed at the high convex parts of the pipelines, and drain pipes / drain pipes / drain pipes are installed at the low concave nodes of the pipelines, and the drain pipes are opened and cut off by inspection valves. When the pipeline needs to drain / drain water, the isolation valves at both ends of the inspection section are closed to isolate a limited length of the inspection pipeline section, and then the inspection valve at the drain pipe of the section is opened to drain the water in the inspection section.

[0003] In the related art, the drainage time required for the isolated maintenance pipe section is basically determined by the total water volume and drainage flow rate in the maintenance pipe. Usually, the diameter of the maintenance valve at the concave node is set to 1 / 3-1 / 5 of the diameter of the main pipe of the pipe section. However, the result of such a design may be: in the case of large pressure difference, since the opening of the maintenance valve has little effect on the drainage flow rate, after opening the maintenance valve, the drainage flow rate will be too large, and the flow rate may reach the point where the air valve on the high convex node of the isolated section has insufficient air suction capacity; and excessive drainage flow may cause drastic pressure fluctuations in the pipe section, and insufficient air suction may cause serious negative pressure, and even affect the structural stability of the local pipe section. In addition, high-pressure drainage without energy dissipation is also prone to cause severe scouring of the downstream receiving water body, which urgently needs to be improved. Utility Model Content

[0004] In response to the defects or improvement needs of the prior art, the present application provides a sand flushing and drainage device, which aims to solve the problem that it is difficult to drain water from the pipeline safely and stably under high pressure difference conditions.

[0005] The present application provides a sand flushing and drainage device, which specifically includes a main drainage pipe and a throttling drainage pipe;

[0006] The main drain pipe is used to communicate with the concave node of the water supply and distribution pipeline to form a main drain channel, and the drain port of the main drain pipe is provided with an end switch device for opening and closing the drain port;

[0007] The throttling drain pipe is connected to the downstream of the main drain pipe to form a branch drain channel. The diameter of the throttling drain pipe is smaller than the diameter of the main drain pipe. The throttling drain pipe is connected in series with a regulating valve for regulating the drain flow of the branch drain channel.

[0008] A filter is connected in series in the main drain pipe or the throttling drain pipe, and the filter is located upstream of the regulating valve.

[0009] Through the above technical scheme conceived by the present application, compared with the prior art, the present device adopts a combined design of a main drain pipe and a bypass throttling drain pipe, as well as a matching regulating valve and filter, to achieve the integration and coordinated operation of controllable drainage (throttling drainage), pressure relief, impurity filtering and sand flushing functions, and can safely and stably drain pipeline water / drainage under high pressure difference conditions.

[0010] When the water discharge section is under high pressure difference condition, the throttling type slow water discharge / release can be realized through the bypass throttling water discharge pipe with smaller diameter and its regulating valve, so that the water discharge flow is controlled to be slightly less than the suction capacity of the air valve on the high convex node of the isolation pipe section, so that the pressure fluctuation amplitude inside the water discharge pipe section is minimized, and the purpose of safe and appropriate speed water discharge is achieved. After the bypass energy dissipation water discharge regulating valve releases the pressure to a sufficiently low residual pressure of the pipe section, the main water discharge pipe can be used to carry out dredging or sand flushing of the water distribution pipeline. In the process of water discharge, when the water flow carries impurities to the filter, the impurities are intercepted by the filter, which is conducive to the centralized collection of impurities in the isolation section of the water distribution pipeline, and can effectively prevent the regulating valve from being blocked.

[0011] As a further preference, the ends of the main drain pipe and / or the throttling drain pipe are arranged horizontally or inclined.

[0012] As further preferred, the sand flushing and drainage device also includes an energy dissipation pool, and the ends of the main drainage pipe and / or the throttling drainage pipe are bent downward and extend into the energy dissipation pool.

[0013] As a further preferred embodiment, an energy dissipation pipe is connected in series at the end of the throttling drain pipe, and the energy dissipation pipe has a plurality of energy dissipation holes.

[0014] As a further preference, the regulating valve is any one of a piston-type flow and pressure regulating valve, a conical drain valve, a sleeve-type flow and pressure regulating valve, a V-type ball valve and a knife gate valve.

[0015] As a further preference, the diameter of the throttling drain pipe is 1 / 4 to 4 / 5 of the diameter of the main drain pipe.

[0016] As a further preference, the sand flushing and drainage device also includes a front-end switch device connected in series at the water inlet of the main drainage pipe.

[0017] As a further preference, the sand flushing and drainage device also includes a cleaning device for cleaning siltation downstream of the main drainage pipe.

[0018] As a further preference, the sand flushing and drainage device further comprises an overload protection mechanism and / or a pressure monitoring mechanism bypassed around the main drainage pipe, and the overload protection mechanism and / or the pressure monitoring mechanism are located upstream of the regulating valve.

[0019] As a further preference, the overload protection mechanism includes a plurality of water hammer relief valves or overpressure relief valves or safety valves.

[0020] In general, the above technical solutions conceived by this application have the following technical advantages compared with the prior art:

[0021] 1. The sand flushing and drainage device adopts a combined design of the main drain pipe and the side-connected throttling drain pipe, as well as matching adjustable energy dissipation accessories, to achieve unified operation of multiple functions such as adjustable throttling drainage, pressure relief, energy dissipation and silt removal / sand flushing, improve the comprehensive performance and operation efficiency of the pipeline system, and can safely and stably drain / release water from the pipeline under high pressure difference conditions.

[0022] 2. The sand flushing and drainage device controls the drainage flow rate through a regulating valve, realizing throttling drainage under different pressure conditions, thereby effectively reducing the pressure fluctuation inside the pipeline and protecting the safe operation of the pipeline system.

[0023] 3. The sand flushing and drainage device is designed with energy dissipation pools and energy dissipation holes to consume excess energy, reduce the impact of water flow on the pipeline and the surrounding environment, and improve the stability and safety of the pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a first composition scheme of the sand flushing and drainage device provided in an embodiment of the present application;

[0025] Figure 2 It is a structural schematic diagram of a second composition scheme of the sand flushing and drainage device provided in an embodiment of the present application;

[0026] Figure 3 It is a structural schematic diagram of a third composition scheme of the sand flushing and drainage device provided in an embodiment of the present application;

[0027] Figure 4 It is a schematic diagram of the connection structure of the cleaning device in the sand flushing and drainage device provided in an embodiment of the present application.

[0028] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0029] 1. Main drain pipe; 2. Throttling drain pipe; 3. Terminal switch device; 4. Regulating valve; 5. Filter; 6. Water supply and distribution pipeline; 7. Energy dissipation pipe; 8. Front switch device; 9. Energy dissipation pool; 10. Overload protection mechanism; 11. Water tap; 12. Hose; 13. Ball valve. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The present application embodiment discloses a sand flushing and drainage device. Figure 1-4 The sand flushing and drainage device comprises a main drainage pipe 1 and a throttling drainage pipe 2. The main drainage pipe 1 is used to communicate with the concave node of the water supply and distribution pipeline 6 to form a main drainage channel; the main drainage pipe 1 has a drainage port, and the drainage port of the main drainage pipe 1 is provided with an end switch device 3 for opening and closing the drainage port. The throttling drainage pipe 2 is connected around the downstream of the main drainage pipe 1 to form a branch drainage channel; the diameter of the throttling drainage pipe 2 is smaller than the diameter of the main drainage pipe 1, and the throttling drainage pipe 2 is connected in series with a regulating valve 4 for adjusting the drainage flow of the branch drainage channel; a filter 5 is connected in series in the main drainage pipe 1 or the throttling drainage pipe 2, and the filter 5 is located upstream of the regulating valve 4.

[0033] When using the sand flushing and drainage device to drain water from the pipeline, the main drain pipe 1 and the throttling drain pipe 2 form a hydraulic interconnection structure that is both (first) connected in series and (later) connected in parallel. Under high pressure difference conditions, the throttling drain pipe 2 with a smaller diameter and its regulating valve 4 can achieve throttling slow water discharge / release, so that the water discharge flow is controlled to a level slightly smaller than the air intake capacity of the air valve on the high convex node of the isolation pipe section in the water distribution pipeline 6, so that the pressure fluctuation amplitude inside the drain pipe section is minimized, and the purpose of safe and appropriate speed water discharge is achieved. After the regulating valve 4 releases the pressure to a sufficiently low residual pressure in the pipe section, the low-pressure silt removal or sand flushing of the main drain pipe 1 is implemented.

[0034] Furthermore, the diameter of the main drain pipe 1 is preferably 1 / 3 to 1 / 5 of the diameter of the water distribution pipeline 6, and the end of the main drain pipe 1 can be set horizontally, bent downward, or inclined; and the throttling drain pipe 2 can be composed of multiple pipe sections connected in series, and the diameter of the throttling drain pipe 2 is preferably 1 / 4 to 4 / 5 of the diameter of the main drain pipe 1, and the end of the throttling drain pipe 2 can be set horizontally, bent downward, or inclined.

[0035] Furthermore, in some embodiments, in order to reduce the impact of water flow on the pipeline and the surrounding environment, the sand flushing and drainage device includes an energy dissipation pool 9 for collecting the outflow water flow of the main drain pipe 1 and / or the throttling drain pipe 2. The energy dissipation pool 9 should have sufficient volume, reasonable structure and outlet channel to absorb and disperse the drainage energy and flow.

[0036] In the main drain pipe 1, the end of the main drain pipe 1 can be long or short. For example, when the main drain pipe 1 is short, its end can be horizontally arranged to discharge water directly and quickly into the atmosphere; when the main drain pipe 1 is long, it can be horizontally extended to a convenient and safe drainage place far from the pipeline foundation, and then discharge water facing the atmosphere. When the sand flushing and drainage device includes an energy dissipation pool 9, and the energy dissipation pool 9 is in a suitable position, the outflow of the main drain pipe 1 can be discharged into the energy dissipation pool 9.

[0037] In some embodiments, a regulating valve 4 may be directly installed at the end of the throttling drain pipe 2 so that the water outlet of the regulating valve 4 directly faces the atmosphere.

[0038] In some embodiments, the throttling drain pipe 2 further has a series of short pipes or long pipes after the valve port of the regulating valve 4; when the pipe section after the valve port is a short pipe, the short pipe can be a series of straight-through open short pipes, or a series of energy dissipation pipes 7 with energy dissipation holes. When the pipe section after the valve port is a long pipe, the long pipe can be horizontally extended to a convenient and safe drainage place far away from the pipeline foundation, and directly discharge water to the atmosphere.

[0039] In some embodiments, when the sand flushing and drainage device includes an energy dissipation pool 9, the end of the throttling drain pipe 2 is preferably bent downward, and the end is connected in series with an energy dissipation pipe 7 extending into the energy dissipation pool 9. The number of energy dissipation pipes 7 connected in series can be one or more, and the energy dissipation holes can be opened in a local area or the entire area of ​​the outer surface of the energy dissipation pipe 7, and can also be opened on the end cover plate that the energy dissipation pipe 7 may have, and the energy dissipation hole is preferably in the shape of a nozzle.

[0040] For ease of understanding, this embodiment Figure 1 , Figure 2 and Figure 3 Three preferred composition schemes of the sand flushing and drainage device are shown, and various arrangements of the main drainage pipe 1, the throttling drainage pipe 2 and other accessories are shown.

[0041] like Figure 1 In the first composition scheme shown, two sections of energy dissipation pipes 7 are connected in series at the end of the throttling drain pipe 2, and a plurality of energy dissipation holes are opened on the upper end of the energy dissipation pipe 7 near the throttling drain pipe 2; the energy dissipation pipe 7 far away from the throttling drain pipe 2 is shorter, and the energy dissipation pipe 7 is densely covered with a plurality of energy dissipation holes, and the energy dissipation pipe 7 can be completely submerged under the water surface of the energy dissipation pool 9. The main drain pipe 1 is arranged horizontally, and its end is shorter. In this scheme, the filter 5 is connected in series in the main drain pipe 1.

[0042] like Figure 2In the second composition scheme shown, the end of the throttling drain pipe 2 is only connected in series with a section of energy dissipation pipe 7, the energy dissipation holes of the energy dissipation pipe 7 are densely distributed in the lower part of the pipe body, and the lower end energy dissipation holes of the energy dissipation pipe 7 can be submerged under the water surface of the energy dissipation pool 9. The main drain pipe 1 is bent downward and extends to the water surface of the energy dissipation pool 9. By opening the end switch device 3 at its end, water can be discharged to the energy dissipation pool 9. In this scheme, the filter 5 is connected in series in the main drain pipe 1.

[0043] like Figure 3 The third composition scheme shown in FIG. 1 is a scheme in which the end of the throttling drain pipe 2 is arranged in the same manner as in FIG. Figure 1 The end arrangement scheme of the throttling drain pipe 2 shown is the same, but the main drain pipe 1 is arranged horizontally, and its end is longer. When the end switch device 3 is opened, the water flow discharged from the main drain pipe 1 can fall into the energy dissipation pool 9 in a nearly parabolic shape under a small pressure difference condition. In this scheme, the filter 5 is connected in series in the throttling drain pipe 2.

[0044] It should be noted that in the above three implementation schemes, the end switch device 3 at the end of the main drain pipe 1 is a blind plate, which is fixed to the drain port at the end of the main drain pipe 1 by bolts, and is watertightly sealed by sealing structures such as sealing gaskets and sealing rings. In other embodiments, the end switch device 3 can be a valve or other structure, as long as it can realize the switch adjustment of the drain port.

[0045] Furthermore, in the sand flushing and drainage device, the regulating valve 4 is used to accurately control / adjust the drainage flow rate, and can achieve slow drainage / drainage under high pressure difference conditions to reduce the pressure fluctuation inside the pipeline. The regulating valve 4 can specifically adopt any one of a piston-type flow regulating and pressure regulating valve, a conical drain valve, a sleeve-type flow regulating valve, a V-type ball valve, and a knife gate valve. When a knife gate valve is selected, the knife gate valve can preferably be a diamond knife gate valve.

[0046] Furthermore, to facilitate the inspection, maintenance and adjustment of the sand flushing and drainage device, the sand drainage device also includes a front-end switch device 8 connected in series at the water inlet of the main drainage pipe 1. The front-end switch device 8 is preferably a maintenance valve, and the front-end switch device 8 is located upstream of the filter 5.

[0047] Furthermore, in some embodiments, the sand flushing and drainage device also includes a cleaning device for cleaning the downstream siltation of the main drainage pipe 1, and the cleaning device may include a high-pressure water flow device or a mechanical brushing device or other applicable silt removal / sand flushing equipment.

[0048] For example, Figure 4As shown, the cleaning device includes a water intake valve, a water diversion pipe and a switch valve. A water intake point is provided at the upper end of the concave node of the water supply and distribution pipeline 6. The water intake point is preferably DN15-50, and the top cover of the filter 5 is provided with a connection port. Under this setting, the water intake valve is connected to the water supply and distribution pipeline 6 at the water intake point to draw out the water in the water supply and distribution pipeline 6. The water intake valve is preferably a water intake tap 11; the switch valve is connected to the filter 5 at the connection port, and the water intake valve and the switch valve are connected by the water diversion pipe to form a switchable water diversion channel, wherein the switch valve is preferably a ball valve 12, and the water diversion pipe is preferably a hose 13. When in use, by opening the water intake valve and the switch valve, impurities deposited downstream of the main drain pipe 1 can be flushed.

[0049] Furthermore, in some embodiments, in order to make the sand flushing and drainage device have good safety protection measures, the sand flushing and drainage device also includes an overload protection mechanism 10 and / or a pressure monitoring mechanism connected around the main drainage pipe 1, and the overload protection mechanism 10 and / or the pressure monitoring mechanism are located upstream of the regulating valve 4. For example, the overload protection mechanism 10 can be a water hammer relief valve or an overpressure relief valve or a safety valve, and the water hammer relief valve or the overpressure relief valve or the safety valve can automatically release water and reduce pressure to protect the safety of the pipe system. The water hammer relief valve or the overpressure relief valve or the safety valve can be set to one or more, and when it is set to multiple, the respective pressure setting values ​​are different. The pressure monitoring mechanism preferably includes a pressure sensor / transmission.

[0050] For example, Figure 3 In one embodiment shown, two water hammer relief valves are connected around the main drain pipe 1; one of the water hammer relief valves is directly connected to the peripheral side of the main drain pipe 1 through a short pipe; the other water hammer relief valve is installed on the throttling drain pipe 2 through a multi-way joint, and the water hammer relief valve is located upstream of the filter 5; at the same time, the two water hammer relief valves are also distributed on both sides of the main drain pipe 1 along the radial direction of the main drain pipe 1, and can perform automatic water discharge and pressure reduction work in sequence under the premise that the set drain pressures are staggered by 1-5m from each other.

[0051] It should be noted that the sand flushing and drainage device is preferably made of corrosion-resistant, high-pressure-resistant and wear-resistant materials to ensure the long-term stable operation of the device in harsh environments.

[0052] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations or constituent elements, and do not limit one or more additional functions, operations and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating specific characteristics, numbers, operations, constituent elements, components or combinations thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components or combinations thereof.

[0053] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0055] 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, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0056] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A sand flushing and drainage device, characterized in that: It comprises a main drain pipe (1) and a throttling drain pipe (2); The main drainage pipe (1) is used to communicate with the concave node of the water supply and distribution pipeline (6) to form a main drainage channel, and the drainage port of the main drainage pipe (1) is provided with an end switch device (3) for opening and closing the drainage port; The throttling drain pipe (2) is connected to the downstream of the main drain pipe (1) to form a branch drain channel. The diameter of the throttling drain pipe (2) is smaller than the diameter of the main drain pipe (1). The throttling drain pipe (2) is connected in series with a regulating valve (4) for regulating the drain flow rate of the branch drain channel. A filter (5) is connected in series in the main drain pipe (1) or the throttling drain pipe (2), and the filter (5) is located upstream of the regulating valve (4).

2. The sand flushing and drainage device according to claim 1, characterized in that: The ends of the main drain pipe (1) and / or the throttling drain pipe (2) are arranged horizontally or inclined.

3. The sand flushing and drainage device according to claim 1, characterized in that: The sand flushing and drainage device further comprises an energy dissipation pool (9), and the ends of the main drainage pipe (1) and / or the throttling drainage pipe (2) are bent downward and extend into the energy dissipation pool (9).

4. The sand flushing and drainage device according to claim 3, characterized in that: An energy dissipation pipe (7) is connected in series to the end of the throttling drain pipe (2), and the energy dissipation pipe (7) has a plurality of energy dissipation holes.

5. The sand flushing and drainage device according to claim 1, characterized in that: The regulating valve (4) is any one of a piston-type flow regulating and pressure regulating valve, a conical drain valve, a sleeve-type flow regulating and pressure regulating valve, a V-shaped ball valve and a knife gate valve.

6. The sand flushing and drainage device according to claim 1, characterized in that: The diameter of the throttling drain pipe (2) is 1 / 4 to 4 / 5 of the diameter of the main drain pipe (1).

7. The sand flushing and drainage device according to any one of claims 1 to 6, characterized in that: The sand flushing and drainage device further comprises a front switch device (8) connected in series at the water inlet of the main drainage pipe (1).

8. The sand flushing and drainage device according to any one of claims 1 to 6, characterized in that: The sand flushing and drainage device also includes a cleaning device for cleaning the siltation downstream of the main drainage pipe (1).

9. The sand flushing and drainage device according to any one of claims 1 to 6, characterized in that: The sand flushing and drainage device further comprises an overload protection mechanism (10) and / or a pressure monitoring mechanism connected around the main drainage pipe (1), and the overload protection mechanism (10) and / or the pressure monitoring mechanism are located upstream of the regulating valve (4).

10. The sand flushing and drainage device according to claim 9, characterized in that: The overload protection mechanism (10) comprises a plurality of water hammer relief valves or overpressure relief valves or safety valves.

Images