Sediment stratified sampling device and method

Abstract

The invention provides a sediment stratified sampling device and method. The sediment stratified sampling device comprises a stratified sampling unit; the layered collection unit comprises a plurality of collection layers, a collection partition plate is arranged between every two adjacent collection layers, and a sand and mud storage tank is defined by every two adjacent collection partition plates; water flow to be layered flows through an upstream pipe network water inlet port, the layered collection units and a downstream water outlet port of the inspection well in sequence and then flows out, and when the water flow flows through the layered collection units, sediments in the water flow are deposited to the sand and mud storage tanks of the corresponding collection layers. According to the sediment stratified sampling device, stratified sampling of sediments in water flow is achieved, the original deposition state of the sediments is reserved, and an accurate and sufficient original deposition state sample of the sediments is provided for obtaining the deposition rule of the sediments.

Description

Technical Field

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

[0002] In urban drainage systems, domestic sewage and rainwater pipes generally face the problem of pollutant accumulation, which not only leads to pipe blockage, but also the sediments may be resuspended under the action of water flow, forming endogenous pollution. At present, the systematic data collection on the sediment deposition law in drainage pipes is still insufficient, making it difficult to conduct in-depth research on the relevant deposition laws. Therefore, the physical bedding structure of the sediment is affected by the special configuration of the pipeline, and there is a small thickness of the sediment layer and the surface flocculent structure is easily destroyed due to shaking during the collection process. In addition, the traditional columnar sludge bedding collection device cannot meet the narrow space operation of the pipeline. How to achieve in-situ retention sampling of the sediment bedding structure and maintain the original state of the pipeline sediment to the greatest extent, so as to accurately obtain relevant data on the sediment deposition law, has become an urgent problem to be solved. Summary of the invention

[0003] The present application provides a sediment stratified sampling device and method, which are used to solve the technical problem of lack of sediment stratified sampling scheme in the prior art.

[0004] In the first aspect, an embodiment of the present application provides a sediment stratified sampling device, which includes a stratified sampling unit; the stratified sampling unit includes multiple sampling layers, and sampling partitions are arranged between adjacent sampling layers, and the adjacent sampling partitions enclose a sand and mud storage tank; the water flow to be stratified flows through the upstream pipe network water inlet port, the stratified sampling unit and the downstream water outlet port of the inspection well in sequence and then flows out, and when flowing through the stratified sampling unit, the sediment in the water flow is deposited in the sand and mud storage tank of the corresponding sampling layer.

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

[0006] In an implementation of the first aspect, the collection partition includes a sudden expansion partition and a sudden contraction partition, the sudden expansion partition and the sudden contraction partition protrude from the side wall of the layered collection unit, and the sizes of multiple sudden expansion partitions and multiple sudden contraction partitions are the same or different.

[0007] In an implementation of the first aspect, the stratified sampling unit further includes an outlet sludge interceptor, and the outlet sludge interceptor is used to resample the water flow.

[0008] In an implementation of the first aspect, the upstream pipe network water inlet port of the outlet sludge retainer is connected to the last sudden expansion baffle.

[0009] In an implementation of the first aspect, a plurality of retaining baffles are provided on the outlet sludge retainer, the plurality of retaining baffles are vertically arranged on the side wall of the outlet sludge retainer, and adjacent retaining baffles are arranged at preset intervals.

[0010] In an implementation of the first aspect, the device also includes: a forward mud transition section, located between the stratified collection unit and the water inlet port of the upstream pipe network, the forward mud transition section is provided with an inlet mud separator, and the inlet mud separator is used to perform preliminary sampling of the water flow; a water outlet transition section, located between the stratified collection unit and the downstream water outlet port of the inspection well, and is used to flow the water flow after stratified sampling to the downstream water outlet port of the inspection well.

[0011] In an implementation of the first aspect, a side surface of the forward mud transition section is an inverted trapezoidal structure to reduce a flow rate of the water flow passing through the forward mud transition section.

[0012] The sediment stratified sampling device provided in the embodiment of the present application includes: a stratified sampling unit; wherein the stratified sampling unit includes a plurality of sand and mud storage tanks for storing sediments in the water flow at different times, thereby realizing stratified sampling of sediments in the water flow, retaining the original deposition state of the sediments, and based on the sediments collected in layers, relevant data on the sediment deposition law can be accurately obtained.

[0013] In an implementation of the first aspect, the sediment stratification sampling device is applied to a drainage network to perform stratified treatment on sewage in the drainage network. The sludge is guided to simulate a vertical deposition process in the horizontal direction through the change in the horizontal stratified flow velocity of the sediment, thereby increasing the amount of sludge deposition collected.

[0014] In the second aspect, an embodiment of the present application provides a sediment stratified sampling method, which is applied to the sediment stratified sampling device described in any one of the first aspects, and the method includes: inputting the water flow to be stratified into the stratified collection unit through the upstream pipe network water inlet port; using the stratified collection unit to perform stratified sampling on the water flow to be stratified; and outputting the water flow after stratified sampling through the downstream water outlet port of the inspection well. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a structural diagram of a sediment stratified sampling device provided in one embodiment of the present application.

[0016] Figure 2 Shown is a structural diagram of another sediment stratified sampling device provided by an embodiment of the present application.

[0017] Figure 3 Shown is a structural diagram of an outlet sludge retainer provided in one embodiment of the present application.

[0018] Figure 4 Shown is a structural diagram of a stratified sampling unit provided in one embodiment of the present application.

[0019] Figure 5 Shown is a structural diagram of a downstream water outlet port of an inspection well provided in one embodiment of the present application.

[0020] Figure 6 Shown is a structural diagram of another sediment stratified sampling device provided by an embodiment of the present application.

[0021] Figure 7 Shown is a schematic diagram of the overall structure of a sediment stratified sampling device provided in one embodiment of the present application.

[0022] Figure 8 Shown is a flow chart of a method for stratified sampling of sediment in a drainage network provided in one embodiment of the present application.

[0023] Component number description

[0024] 11 Stratified sampling unit 111 Collection Layer 112 Collection partition 1121 Sudden expansion partition 1122 Shrinkage partition 113 Sand and mud storage tank 114 Outlet sludge trap 115 Retention partition 1151 silt 12 Upstream pipe network water inlet port 13 Inspection well downstream water outlet port 14 Forward mud transition section 140 Inlet guide vane 141 Imported base 142 Inlet guide vane elastic bridge rod 143 Semi-circular inlet port 15 Outlet transition section DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the form, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0027] A sediment stratified sampling device provided in an embodiment of the present application includes: a stratified sampling unit; the stratified sampling unit includes multiple sampling layers, and sampling partitions are arranged between adjacent sampling layers, and the adjacent sampling partitions enclose a sand and mud storage tank; the water flow to be stratified flows through the upstream pipe network water inlet port, the stratified sampling unit and the downstream water outlet port of the inspection well in sequence and then flows out, and when flowing through the stratified sampling unit, the sediment in the water flow is deposited in the sand and mud storage tank of the corresponding sampling layer. The sediment stratified sampling device can solve the technical problem of the lack of stratified sampling scheme for sediment in the prior art.

[0028] The technical solutions in the embodiments of the present application will be described in detail below in conjunction with the drawings in the embodiments of the present application.

[0029] Figure 1 The structure diagram of the sediment stratification sampling device provided by one embodiment of the present application is shown. Figure 1 As shown, the sediment stratified sampling device provided in the embodiment of the present application includes a stratified sampling unit 11. The stratified sampling unit includes a plurality of sampling layers 111, and a sampling partition 112 is provided between adjacent sampling layers, and the adjacent sampling partitions enclose a sand and mud storage tank 113. The water flow to be stratified flows through the upstream pipe network water inlet port 12, the stratified sampling unit 11 and the downstream water outlet port 13 of the inspection well in sequence and then flows out. When flowing through the stratified sampling unit 11, the sediment in the water flow is deposited in the sand and mud storage tank 113 of the corresponding sampling layer.

[0030] The layered collection unit 11 includes a plurality of collection baffles 112 and a plurality of sand and mud storage tanks 113 , and the plurality of sand and mud storage tanks 113 are used to deposit sediments of water flows at different times.

[0031] The sizes of the plurality of sand and mud storage tanks 113 are the same or different. The sand and mud storage tanks 113 of different sizes store different amounts of sediment.

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

[0033] The sediment stratified sampling device provided in the embodiment of the present application includes a stratified sampling unit 11; the stratified collection unit 11 includes multiple collection layers 111, and collection partitions 112 are arranged between adjacent collection layers 111, and adjacent collection partitions 112 enclose a sand and mud storage tank 113; the water flow to be stratified flows through the upstream pipe network water inlet port 12, the stratified collection unit 11 and the downstream water outlet port 13 of the inspection well in sequence and then flows out. When flowing through the stratified collection unit 11, the sediment in the water flow is deposited in the sand and mud storage tank 113 of the corresponding collection layer, thereby realizing stratified sampling of the sediment in the water flow, retaining the original sedimentation state of the sediment, and providing an accurate sediment sample for exploring the sedimentation law of the sediment.

[0034] Figure 2 The structure diagram of the sediment stratification sampling device provided by one embodiment of the present application is shown. Figure 2 As shown, the stratified sampling device is connected to the forward mud transition section 14. The forward 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 pipe network water inlet port 12. The forward mud transition section 14 is provided with an inlet guide vane 140, and the inlet guide vane 140 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 vane elastic bridging rod 142 for connecting and fixing therein. An inlet semi-annular flow port 143 is present between the inlet guide vane 140 and the inlet base 141. The inlet guide vane 140 is connected to the inlet guide vane 140 through the inlet guide vane elastic bridging rods 142 on both sides. The inlet guide vane 140 can rotate around the inlet guide vane elastic bridging rod 142 under the impact of water flow.

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

[0038] When the water flow to be stratified passes through the forward mud transition section 14, the flow cross section is narrowed and the flow velocity is slightly increased, which helps large-grained sand and gravel enter the inlet guide vane 140. Specifically, before the water flow to be stratified flows through the inlet guide vane 140 and enters the stratified collection unit, the inlet semi-annular flow port 143 at the front end of the inlet guide vane 140 can store a small amount of large-grained sediments, and the preliminary sampling of the sediments of the water flow to be stratified is achieved at the inlet semi-annular flow port 143.

[0039] Specifically, when the water flow is in a low flow rate state, the downward pressure of the fluid on the inlet guide vane 140 is limited, the inlet semi-annular flow port 143 is in an open state, and the inlet guide vane 140 guides the water flow to flow obliquely upward and backward to avoid directly impacting the sediment in the sand and mud storage tank 113 in the stratified sampling device.

[0040] When the water flow is in a high flow rate state, the fluid downward pressure on the inlet guide vane 140 is relatively large, the inlet semi-annular flow port 143 is in a closed state, and the inlet guide vane 140 guides the water flow to flow obliquely upward and rearward, and the upward inclination ratio is greater than that in a low flow rate state. In this case, the pipeline is in a suspended flow rate state, and the stratified sampling device does not collect sediment to avoid direct impact on the sediment in the sand and mud storage tank 113.

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

[0042] The water flow to be stratified continues forward and enters the stratified sampling unit 11, wherein the stratified sampling unit 11 includes a plurality of collection baffles 112 and a plurality of sand and mud storage tanks 113, wherein the collection baffles 112 include a sudden expansion baffle 1121 and a sudden contraction baffle 1122, the sudden expansion baffle 1121 and the sudden contraction baffle 1122 protrude from the side wall of the stratified collection unit 11, and the sizes of the plurality of sudden expansion baffles 1121 and the plurality of sudden contraction baffles 1122 are the same or different.

[0043] Specifically, the plurality of sudden expansion baffles 1121 and the plurality of sudden contraction baffles 1122 are arranged alternately, and the sand and mud storage tanks 113 are arranged alternately with the sudden expansion baffles 1121 or the sudden contraction baffles 1122 .

[0044] The cross-sectional shape of the sudden expansion baffle 1121 along the water flow direction is crescent-shaped, and the cross-sectional shape of the sudden contraction baffle 1122 along the water flow direction is annular. The crescent-shaped sudden expansion baffle 1121 and the annular sudden contraction baffle 1122 are arranged at intervals.

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

[0046] After the water flows through the sand and mud storage tank 113, it passes through the sudden expansion baffle 1121, and the flow cross-section of the water flow increases, the flow velocity decreases, and the sediment deposition above the sand and mud storage tank 113 following the sudden expansion baffle 1121 is strengthened. Therefore, by staggeredly arranging multiple crescent-shaped sudden expansion baffles 1121 and multiple annular sudden contraction baffles 1122, the deceleration of the water flow is intermittently achieved, and the sediment is deposited in the sequentially arranged sand and mud storage tanks 113 according to the law of specific gravity, forming a layered arrangement similar to traditional vertical deposition.

[0047] The stratified sampling unit 11 also includes an outlet sludge interceptor 114, the water inlet port of which is connected to the terminal sudden contraction baffle 1122. The outlet sludge interceptor 114 is used to store the terminal low density, and a plurality of interception baffles 115 are arranged on the outlet sludge interceptor 114 in a rotating distribution around the axis of the sewage pipeline, and the plurality of interception baffles 115 are vertically arranged on the side wall of the outlet sludge interceptor 114.

[0048] The preset intervals between adjacent retention partitions 115 are the same or arranged with fewer at the bottom and more at the top.

[0049] For example, the attached Figure 3 It can be seen that multiple retention baffles 115 form triangular areas with the side walls of the outlet silt retainer 114, and a single retention baffle 115 forms a certain angle with the side wall of the outlet silt retainer 114 to deposit finer silt and prevent the deposited silt from being washed away by the water flow, thereby achieving re-sampling of the stratified water flow.

[0050] Specifically, compared with the sediments deposited by the water flow in the stratified collection unit 11, the sediments (e.g., silt) deposited at the retention baffle 115 in the water flow have smaller particles. For example, the sediments deposited by the water flow passing through the stratified collection unit 11 are sand, and when the water flow passes through the retention baffle 115, the sediments at the retention baffle 115 are silt 1151 with a smaller density.

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

[0052] In one embodiment of the present application, the stratified sampling unit 11 includes a sand and sludge storage tank 113, a sudden expansion baffle 1121 and a sudden contraction baffle 1122, an outlet silt retainer 114, and a plurality of retention baffles 115 located on the side walls of the outlet silt retainer 114. After the plurality of sand and sludge storage tanks 113 in the stratified sampling unit sample the sediments in the water flow in turn, the retention baffle 115 on the outlet silt retainer 114 samples the water flow again, thereby increasing the number of sampling times of the sediment stratified sampling device on the sediments in the water flow, so as to obtain the sediments of the water flow at more times, and providing more sufficient sediment samples for the subsequent acquisition of relevant data on the sediment deposition law.

[0053] Figures 4 to 7 The detailed structures of the various structures in the sediment stratified sampling device in the present application at different angles and the overall structural diagram of the sediment stratified sampling device are shown respectively, wherein the connection relationship between the different structures in the sediment stratified sampling device and the functions in the above Figure 2 It has been described in detail in the present application and will not be repeated in detail.

[0054] Figure 8 The flowchart of the stratified sampling method of the drainage network sediment provided by one embodiment of the present application is shown. Figure 8 As shown, the stratified sampling method for drainage network sediments provided in the embodiment of the present application includes the following steps S81 to S83.

[0055] S81, inputting the water flow to be stratified into the stratification collection unit through the water inlet port of the upstream pipe network.

[0056] Exemplarily, the water flow to be stratified can be directly obtained from the outlet of a sewage pipe, or water flow from a wastewater treatment plant, a river, etc. can be collected.

[0057] In addition, when obtaining the water flow in the sewage pipe, the water flow can also be directly obtained through special sampling equipment for the sewage pipe.

[0058] S82, using the stratified sampling unit to perform stratified sampling on the water flow to be stratified.

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

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

[0061] As described above, the embodiment of the present application provides a stratified sampling method for sediments in a drainage network, wherein the water flow to be stratified is input into a stratified collection unit from an input port, the original sedimentation state of the sediment is retained in the stratified collection unit, and the sediments at different times in the water flow are collected, thereby realizing stratified sampling of sediments in the water flow. The sediments that retain the original sedimentation state after stratified sampling can be used for subsequent analysis of the sedimentation laws, thereby solving the technical problem of the lack of a stratified sampling scheme for sediments in the prior art.

[0062] The protection scope of the sediment stratified sampling device of the embodiment of the present application is not limited to the execution order of the steps listed in this embodiment. All solutions implemented by adding, reducing or replacing steps in the prior art based on the principles of the present application are included in the protection scope of the present application.

[0063] The descriptions of the processes or structures corresponding to the above-mentioned figures have different emphases. For parts that are not described in detail in a certain process or structure, please refer to the relevant descriptions of other processes or structures.

[0064] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A sediment stratified sampling device, characterized in that: The device comprises a stratified sampling unit; The layered collection unit includes a plurality of collection layers, and collection partitions are arranged between adjacent collection layers, and the adjacent collection partitions enclose a sand and mud storage tank; The water flow to be stratified flows through the water inlet port of the upstream pipe network, the stratified collection unit and the downstream water outlet port of the inspection well in sequence and then flows out. When flowing through the stratified collection unit, the sediment in the water flow is deposited in the sand and mud storage tank of the corresponding collection layer.

2. The sediment stratified sampling device according to claim 1, characterized in that: The stratified sampling unit further comprises an outlet silt interceptor, and the outlet silt interceptor is used for re-sampling the water flow.

3. The sediment stratified sampling device according to claim 2, characterized in that: The collection partitions include a sudden expansion partition and a sudden contraction partition, the sudden expansion partition and the sudden contraction partition protrude from the side wall of the layered collection unit, and the sizes of a plurality of the sudden expansion partitions and a plurality of the sudden contraction partitions are the same or different.

4. The sediment stratified sampling device according to claim 3, characterized in that: The upstream pipe network water inlet port of the outlet sludge retainer is connected to the last-most contraction partition.

5. The sediment stratified sampling device according to claim 4, characterized in that: The outlet sludge retainer is provided with a plurality of retaining baffles, which are vertically arranged on the side wall of the outlet sludge retainer, and adjacent retaining baffles are arranged at preset intervals.

6. The sediment stratified sampling device according to claim 1, characterized in that: The sizes of the plurality of sand and mud storage tanks are the same or different.

7. The sediment stratified sampling device according to claim 1, characterized in that: The device also includes: A forward mud transition section is located between the stratified collection unit and the water inlet port of the upstream pipe network, and the forward mud transition section is provided with an inlet mud separator, and the inlet mud separator is used to perform 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 flow the water flow after stratified sampling to the downstream water outlet port of the inspection well.

8. The sediment stratified sampling device according to claim 7, characterized in that: The side surface of the forward mud transition section is an inverted trapezoidal structure to reduce the flow rate of the water flow passing through the forward mud transition section.

9. The sediment stratified sampling device according to claim 1, characterized in that: It is applied to a drainage network to perform stratified treatment on sewage in the drainage network.

10. A stratified sampling method for sediment in a drainage network, characterized in that: Applicable to the sediment stratified sampling device according to any one of claims 1 to 8, the method comprising: Inputting the water flow to be stratified into the stratification collection unit through the water inlet port of the upstream pipe network; Using the stratified sampling unit to perform stratified sampling on the water flow to be stratified; The water flow after stratified sampling is output through the downstream water outlet port of the inspection well.

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