Sediment sub-sampling device and method

Abstract

The application provides a sediment stratified sampling device and method, which comprises a stratified sampling unit; the stratified sampling unit comprises a plurality of sampling layers, and sampling partitions are arranged between adjacent sampling layers, and adjacent sampling partitions form sand and mud storage grooves; a water flow to be stratified flows out after sequentially flowing through an upstream pipe network water inlet port, the stratified sampling unit and a downstream water outlet port of a manhole, and when flowing through the stratified sampling unit, the sediment in the water flow is deposited into the sand and mud storage groove of the corresponding sampling layer. The sediment stratified sampling device realizes stratified sampling of the sediment in the water flow, retains the original deposition state of the sediment, and provides accurate and sufficient sediment original deposition state samples for obtaining the deposition rule of the sediment.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of sediment monitoring, and relates to a sediment layering sampling device, in particular to a sediment layering sampling device and method. BACKGROUND

[0002] In the urban drainage system, the pipe network of domestic sewage and rainwater generally faces the problem of pollutant accumulation, which not only causes pipe blockage, but also may cause internal source pollution under the scouring action of water flow. At present, systematic data collection on the sediment deposition law in the drainage pipe is still insufficient, which makes it difficult to further carry out the research on the related deposition law. Therefore, the sediment layer structure is affected by the special configuration of the pipe, and the sediment layer thickness is small, and the surface flocculent structure is easily damaged due to shaking in the collection process. In addition, the traditional columnar sludge layering collection device cannot meet the operation in the narrow space of the pipe. How to realize the in-situ preservation sampling of the sediment layer structure and maximize the preservation of the original state of the pipe sediment so as to accurately obtain the related data of the sediment deposition law has become a problem to be solved. SUMMARY

[0003] The present application provides a sediment layering sampling device and method, which solves the technical problem of lack of sediment layering sampling scheme in the prior art.

[0004] In a first aspect, an embodiment of the present application provides a sediment layering sampling device, which comprises a layering sampling unit; the layering sampling unit comprises a plurality of collection layers, and a collection partition plate is arranged between adjacent collection layers, and adjacent collection partition plates form a sand and sludge storage groove.

[0005] In an implementation manner of the first aspect, the sizes of the plurality of sand and sludge storage grooves are the same or different.

[0006] In an implementation manner of the first aspect, the collection partition plate comprises a bulging partition plate and a bulging partition plate, and the bulging partition plate and the bulging partition plate protrude from the side wall of the layering sampling unit, and the sizes of the plurality of bulging partition plates and the plurality of bulging partition plates are the same or different.

[0007] In an implementation manner of the first aspect, the layering sampling unit further comprises an outlet sludge interceptor, and the outlet sludge interceptor is used for resampling the water flow.

[0008] In one implementation of the first aspect, the upstream pipeline inlet of the outlet sludge interceptor is connected to the final expansion baffle.

[0009] In one implementation of the first aspect, the outlet sludge interceptor is provided with a plurality of interception baffles, the plurality of interception baffles being vertically arranged on the side wall of the outlet sludge interceptor, and adjacent interception baffles being arranged at a preset interval.

[0010] In one implementation of the first aspect, the device further includes: an advance mud transition section located between the stratified sampling unit and the upstream pipeline inlet port, the advance mud transition section being provided with an inlet mud separator for preliminary sampling of the water flow; and an outlet transition section located between the stratified sampling unit and the downstream outlet port of the inspection well for diverting the water flow after stratified sampling to the downstream outlet port of the inspection well.

[0011] In one implementation of the first aspect, the side of the advancing mud transition section is an inverted trapezoidal structure to reduce the flow velocity of the water flowing through the advancing mud transition section.

[0012] The sediment stratification sampling device provided in this embodiment includes a stratification sampling unit; wherein the stratification sampling unit includes multiple sand and mud storage tanks for storing sediments in the water flow at different times, realizing stratification sampling of sediments in the water flow, preserving the original sedimentation state of the sediments, and accurately obtaining relevant data on sediment deposition patterns based on the stratified sediments.

[0013] In one implementation of the first aspect, the sediment stratification sampling device is applied to a drainage network to perform stratified treatment of sewage in the network. By varying the horizontal stratification flow velocity of sediment, the device guides the sludge to simulate a vertical deposition process in the horizontal direction, thereby increasing the amount of sludge collected.

[0014] Secondly, embodiments of this application provide a sediment stratification sampling method, applied to the sediment stratification sampling device described in any one of the first aspects. The method includes: inputting the water flow to be stratified into the stratification acquisition unit through the upstream pipeline inlet port; performing stratification sampling on the water flow to be stratified using the stratification acquisition unit; and outputting the stratified water flow through the downstream outlet port of the inspection well. Attached Figure Description

[0015] Figure 1 The diagram shown is a structural diagram of a sediment stratification sampling device provided in an embodiment of this application.

[0016] Figure 2 The diagram shown is a structural diagram of another sediment stratification sampling device provided in an embodiment of this application.

[0017] Figure 3 The diagram shown is a structural diagram of an outlet sludge trap provided in an embodiment of this application.

[0018] Figure 4 The diagram shown is a structural diagram of a hierarchical sampling unit provided in an embodiment of this application.

[0019] Figure 5 The diagram shown is a structural diagram of the downstream outlet port of a manhole provided in an embodiment of this application.

[0020] Figure 6 The diagram shown is a structural diagram of another sediment stratification sampling device provided in an embodiment of this application.

[0021] Figure 7 The diagram shown is a schematic representation of the overall structure of a sediment stratification sampling device provided in an embodiment of this application.

[0022] Figure 8 The flowchart shown is a method for stratified sampling of sediments in a drainage network according to an embodiment of this application.

[0023] Component designation explanation

[0024] 11 Layered sampling unit 111 Collection layer 112 Collection baffle 1121 Rapid expansion baffle 1122 Rapid contraction baffle 113 Sand and mud storage tank 114 Outlet sludge trap 115 Trapping baffle 1151 Sludge 12 Upstream pipe network water inlet port 13 Inspection well downstream water outlet port 14 Forward mud transition section 140 Inlet guide vane 141 Inlet base 142 Inlet guide vane elastic bridge rod 143 Inlet semi-ring type flow passage 15 Water outlet transition section Detailed Implementation

[0025] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the shape, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0027] This application provides a sediment stratification sampling device comprising: a stratification sampling unit; the stratification sampling unit includes multiple sampling layers, with sampling partitions between adjacent sampling layers, and the adjacent sampling partitions forming a sand and mud storage tank; the water to be stratified flows sequentially through the upstream pipeline inlet port, the stratification sampling unit, and the downstream outlet port of the inspection well before flowing out; when flowing through the stratification sampling unit, the sediment in the water is deposited into the sand and mud storage tank of the corresponding sampling layer; this sediment stratification sampling device can solve the technical problem of the lack of sediment stratification sampling schemes in the prior art.

[0028] The technical solutions in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0029] Figure 1 The diagram shown illustrates the structure of a sediment stratification sampling apparatus provided in an embodiment of this application. Figure 1 As shown, the sediment stratification sampling device provided in this application embodiment includes a stratification sampling unit 11. The stratification sampling unit includes multiple sampling layers 111, and sampling partitions 112 are provided between adjacent sampling layers. The adjacent sampling partitions enclose a sand and mud storage tank 113. The water to be stratified flows sequentially through the upstream pipeline inlet port 12, the stratification sampling unit 11, and the downstream outlet port 13 of the inspection well before flowing out. When flowing through the stratification sampling unit 11, the sediment in the water is deposited into the sand and mud storage tank 113 of the corresponding sampling layer.

[0030] The layered collection unit 11 includes multiple collection partitions 112 and multiple sand and mud storage tanks 113, which are used to deposit sediments from water flows at different times.

[0031] The multiple sand and sediment storage tanks 113 may be the same or different in size. The amount of sediment stored in sand and sediment storage tanks 113 of different sizes is different.

[0032] Specifically, the cross-sectional shape of the sand and mud storage tank 113 is semi-circular.

[0033] The sediment stratification sampling device provided in this application embodiment includes a stratification sampling unit 11; the stratification sampling unit 11 includes multiple sampling layers 111, and sampling partitions 112 are provided between adjacent sampling layers 111, and adjacent sampling partitions 112 enclose a sand and mud storage tank 113; the water to be stratified flows sequentially through the upstream pipeline inlet port 12, the stratification sampling unit 11, and the downstream outlet port 13 of the inspection well before flowing out. When flowing through the stratification sampling unit 11, the sediment in the water is deposited into the sand and mud storage tank 113 of the corresponding sampling layer, realizing stratified sampling of sediment in the water flow, preserving the original sedimentary state of the sediment, and providing accurate sediment samples for exploring the sedimentary patterns of sediment.

[0034] Figure 2 The diagram shown illustrates the structure of a sediment stratification sampling apparatus provided in an embodiment of this application. Figure 2 As shown, the stratified sampling device is connected to the advance mud transition section 14. The advance mud transition section 14 is used to input the water flow to be stratified into the stratified sampling device.

[0035] The forward mud transition section 14 is located between the stratified collection unit 11 and the upstream pipeline inlet port 12. The forward mud transition section 14 is equipped with an inlet guide vane 140, which is used to perform preliminary sampling of the water flow.

[0036] The forward mud transition section 14 also includes an inlet base 141 and an inlet guide plate elastic bridging rod 142 for connection and fixation. There is an inlet semi-annular flow port 143 between the inlet guide plate 140 and the inlet base 141. The inlet guide plate 140 is connected to the inlet guide plate 142 on both sides. The inlet guide plate 140 can rotate around the inlet guide plate elastic bridging rod 142 under the impact of water flow.

[0037] The inlet base 141 has a trapezoidal cross section, and the front platform of the inlet base 141 can effectively prevent small stones from entering the interior of the stratified sampling device.

[0038] When the water flow to be stratified passes through the advance mud transition section 14, the cross-sectional area narrows and the flow velocity increases slightly, assisting large particles of sand and gravel to enter the inlet guide plate 140. Specifically, before the water flow to be stratified enters the stratification sampling unit after passing through the inlet guide plate 140, the inlet semi-annular inlet 143 at the front end of the inlet guide plate 140 can store a small amount of large-particle sediment, and preliminary sampling of the sediment of the water flow to be stratified is achieved at the inlet semi-annular inlet 143.

[0039] Specifically, when the water flow is at a low velocity, the downward pressure of the fluid on the inlet guide vane 140 is limited, the inlet semi-annular outlet 143 is in the open state, and the inlet guide vane 140 guides the water flow to flow obliquely upward and backward, avoiding direct impact on the sand and mud storage tank 113 in the stratified sampling device.

[0040] When the water flow is at a high velocity, the inlet guide vane 140 experiences a large downward pressure from the fluid. The inlet semi-annular outlet 143 is closed, and the inlet guide vane 140 guides the water flow to flow obliquely upward and backward. The upward inclination ratio is greater than that under low velocity conditions. In this case, the pipeline is in a suspended velocity state, and the stratified sampling device does not collect sediments to avoid directly impacting the silt in the sand and mud storage tank 113.

[0041] As the water flows from the advance mud transition section 14 into the stratified sampling unit 11, it flows obliquely upward under the action of the inlet narrowing section of the advance mud transition section 14. The heavier sand and gravel in the water will be deposited in the sand and mud storage tank 113 near the advance mud transition section 14 due to gravity, while the rest of the water continues to flow forward.

[0042] The water flow to be stratified continues to enter the stratified sampling unit 11, which includes multiple sampling baffles 112 and multiple sand and mud storage tanks 113. The sampling baffles 112 include expanding baffles 1121 and contracting baffles 1122, which protrude from the sidewall of the stratified sampling unit 11. The multiple expanding baffles 1121 and the multiple contracting baffles 1122 may have the same or different dimensions.

[0043] Specifically, the plurality of the expanding baffles 1121 and the plurality of contracting baffles 1122 are arranged alternately, and the sand and mud storage tank 113 is arranged alternately with the expanding baffles 1121 or the contracting baffles 1122.

[0044] The expansion baffle 1121 has a crescent-shaped cross-section along the water flow direction, and the contraction baffle 1122 has an annular cross-section along the water flow direction. The crescent-shaped expansion baffle 1121 and the annular contraction baffle 1122 are arranged alternately.

[0045] It should be noted that this application does not limit the number of expansion partitions 1121 and contraction partitions 1122. In practical applications, an appropriate number of expansion partitions 1121 and contraction partitions 1122 can be set based on the actual application scenario.

[0046] Subsequently, after the water flows through the sand and mud storage tank 113, it passes through the abrupt expansion baffle 1121, which increases the cross-sectional area of ​​the water flow and reduces the flow velocity, thus enhancing the sediment deposition above the sand and mud storage tank 113 following the abrupt expansion baffle 1121. Therefore, by intermittently setting multiple crescent-shaped abrupt expansion baffles 1121 and multiple annular abrupt contraction baffles 1122, the water flow is slowed down, and the sediment is deposited in the sequentially arranged sand and mud storage tank 113 according to the specific gravity, forming a layered arrangement similar to traditional vertical sedimentation.

[0047] The stratified sampling unit 11 also includes an outlet sludge interceptor 114, the inlet of which is connected to the final constriction baffle 1122. The outlet sludge interceptor 114 is used to retain low-density sludge at the end, and multiple interception baffles 115 are rotatably distributed around the axis of the sewage pipeline on it, with the multiple interception baffles 115 vertically arranged on the side wall of the outlet sludge interceptor 114.

[0048] The pre-set intervals between adjacent interception partitions 115 are the same, or the bottom has fewer and the top has more.

[0049] For example, by appendix Figure 3 It can be seen that multiple interception baffles 115 form triangular areas with the side walls of the outlet sludge interceptor 114, and a single interception baffle 115 forms a certain angle with the side walls of the outlet sludge interceptor 114, so as to deposit finer sludge and avoid the deposited sludge being washed away by the water flow, thereby achieving resampling of the water flow to be stratified.

[0050] Specifically, compared to the sediments deposited by the water flow in the stratified collection unit 11, the sediments (e.g., silt) deposited at the interception baffle 115 are smaller in particle size. For example, the sediments deposited by the water flow through the stratified collection unit 11 are sand, while the sediments at the interception baffle 115 are silt 1151 with a lower density when the water flow passes through the interception baffle 115.

[0051] The outlet sludge interceptor 114 of the stratified sampling device 11 is connected to the water outlet transition section 15. The water outlet transition section 15 is located between the stratified sampling unit 11 and the downstream water outlet port 13 of the inspection well, and is used to flow the water after stratified sampling to the downstream water outlet port 13 of the inspection well.

[0052] In one embodiment of this application, the stratified sampling unit 11 includes a sand and mud storage tank 113, a sudden expansion baffle 1121 and a sudden contraction baffle 1122, an outlet silt trap 114, and multiple trap baffles 115 located on the side wall of the outlet silt trap 114. After the multiple sand and mud storage tanks 113 in the stratified sampling unit sequentially sample the sediments in the water flow, the trap baffles 115 on the outlet silt trap 114 sample the water flow again, thereby increasing the number of times the sediment stratified sampling device samples the sediments in the water flow, so as to obtain sediments in the water flow at more times, and provide more sufficient sediment samples for subsequent acquisition of relevant data on sediment deposition patterns.

[0053] Figures 4 to 7 The detailed construction of each structure in the sediment stratification sampling device of this application from different angles and the overall structural schematic diagram of the sediment stratification sampling device are shown respectively, wherein the connection relationship between the different structures in the sediment stratification sampling device and their functions are shown. Figure 2 As already described in detail in the previous work, this application will not repeat it here.

[0054] Figure 8 The flowchart shown is a method for stratified sampling of sediments in a drainage network according to an embodiment of this application. Figure 8 As shown, the drainage pipe network sediment stratification sampling method provided in this application embodiment includes the following steps S81 to S83.

[0055] S81, the water flow to be stratified is input into the stratification acquisition unit through the upstream pipeline inlet port.

[0056] For example, the water flow to be stratified can be obtained directly from the outlet of a sewage pipe, or it can be collected from wastewater treatment plants, rivers, and other sources.

[0057] In addition, when obtaining water flow data from sewage pipes, the water flow can also be obtained directly using specialized sampling equipment for sewage pipes.

[0058] S82, the layered acquisition unit is used to perform layered sampling of the water flow to be layered.

[0059] Based on the stratified acquisition unit, sediments of the water flow to be collected at different times can be obtained.

[0060] S83, the water flow after stratified sampling is output through the downstream outlet port of the inspection well.

[0061] As described above, this application provides a method for stratified sampling of sediments in a drainage network. By inputting the water flow to be stratified into a stratified sampling unit from the input port, the original sedimentary state of the sediments is preserved in the stratified sampling unit. Sediments at different times in the water flow are collected, realizing stratified sampling of sediments in the water flow. The sediments that retain the original sedimentary state after stratified sampling can be used for subsequent analysis of sediment deposition patterns, solving the technical problem of the lack of stratified sampling schemes for sediments in the prior art.

[0062] The protection scope of the sediment stratification sampling device in this application is not limited to the execution order of the steps listed in this embodiment. Any solution implemented by adding, subtracting, or replacing steps in the prior art based on the principles of this application is included within the protection scope of this application.

[0063] The descriptions of the processes or structures corresponding to the above figures each have their own emphasis. For parts of a process or structure that are not described in detail, please refer to the relevant descriptions of other processes or structures.

[0064] The above embodiments are merely illustrative of the principles and effects of this application and are not intended to limit this application. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this application should still be covered by the claims of this application.

Claims

1. A sediment stratification sampling device, characterized in that, The device includes a layered acquisition unit; The layered acquisition unit includes multiple acquisition layers, and acquisition partitions are provided between adjacent acquisition layers. The adjacent acquisition partitions form a sand and mud storage tank. The stratified acquisition unit also includes an outlet sludge interceptor, which is used to resample the water flow; The upstream pipeline inlet of the outlet sludge interceptor is connected to the final constriction baffle. The outlet sludge interceptor is provided with multiple interception baffles, which are vertically arranged on the side wall of the outlet sludge interceptor, and adjacent interception baffles are arranged at a preset interval. The collection baffle includes a protruding expansion baffle and a protruding contraction baffle, which protrude from the sidewall of the layered collection unit. Multiple protruding expansion baffles and multiple protruding contraction baffles may have the same or different dimensions. The cross-sectional shape of the protruding expansion baffle along the water flow direction is crescent-shaped, and the cross-sectional shape of the protruding contraction baffle along the water flow direction is annular. The crescent-shaped protruding expansion baffle and the annular protruding contraction baffle are alternately arranged. Subsequently, after the water flows through the sand and mud storage tank, it passes through the protruding expansion baffle, increasing the cross-sectional area of ​​the water flow and reducing the flow velocity, thus enhancing the sediment deposition above the sand and mud storage tank following the protruding expansion baffle. Therefore, by alternately arranging multiple crescent-shaped protruding expansion baffles and multiple annular protruding contraction baffles, the water flow is intermittently slowed down, and the sediment, according to its specific gravity, is deposited in the sequentially arranged sand and mud storage tank, forming a layered arrangement similar to traditional vertical sedimentation. The water to be stratified flows sequentially through the upstream pipeline inlet port, the stratified collection unit, and the downstream outlet port of the inspection well before flowing out. When flowing through the stratified collection unit, the sediment in the water is deposited into the sand and mud storage tank corresponding to the collection layer.

2. The sediment stratification sampling device according to claim 1, characterized in that: The dimensions of the multiple sand and mud storage tanks may be the same or different.

3. The sediment stratification sampling device according to claim 1, characterized in that, The device further includes: The forward mud transition section is located between the layered collection unit and the upstream pipeline inlet port. The forward mud transition section is equipped with an inlet mud separator, which is used for preliminary sampling of the water flow. The water outlet transition section is located between the stratified sampling unit and the downstream water outlet port of the inspection well, and is used to direct the water flow after stratified sampling to the downstream water outlet port of the inspection well.

4. The sediment stratification sampling device according to claim 3, characterized in that, The side of the advance mud transition section has an inverted trapezoidal structure to reduce the flow velocity of the water flowing through the advance mud transition section.

5. The sediment stratification sampling device according to claim 1, characterized in that, It is applied to drainage pipe networks to perform stratified treatment of sewage in the drainage pipe networks.

6. A method for stratified sampling of sediments in a drainage pipe network, characterized in that, The method, applied to the sediment stratification sampling apparatus according to any one of claims 1 to 5, comprises: The water flow to be stratified is input into the stratified acquisition unit through the upstream pipeline inlet port; The layered sampling unit is used to perform layered sampling of the water flow to be layered; The water flow after stratified sampling is output through the downstream outlet port of the inspection well.

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