Sampling device for rainwater storage pond

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By designing a rainwater storage tank sampling device including floating components, limiting components, sampling ports, sampling tubes and counterweights, the problem of inability to monitor the liquid level changes of the storage tank in real time and accurately obtain rainwater on the upper surface in the prior art is solved, and efficient water quality monitoring and pollutant prevention of the rainwater storage tank is achieved.

CN223021616UActive Publication Date: 2025-06-24TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD

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Patent Information

Application Number: CN202421769511.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-07-25
Publication Date: 2025-06-24
Estimated Expiration: 2034-07-25

AI Technical Summary

Technical Problem

The water quality online monitoring equipment of existing rainwater storage tanks cannot monitor the liquid level changes of the storage tanks in real time, and the sampling device is difficult to accurately obtain rainwater on the upper surface that may overflow, which can easily lead to direct discharge of pollutants to the river channel without treatment.

Method used

A rainwater storage tank sampling device is designed, including a floating component, a limiting component, a sampling port, a sampling tube and a counterweight. Through the coordination of the floating component and a counterweight, the sampling position changes with the liquid level, ensuring accurate sampling, and cleaning the residual rainwater and impurities in the sampling tube through a two-way sampling pump.

Benefits of technology

Real-time water quality monitoring under the liquid level changes of the rainwater storage tank is realized, ensuring accurate sampling, avoiding pollutant emissions, reducing the risk of device blockage, and ensuring the cleanliness of water sample data.

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Abstract

The utility model relates to a sampling device for a rainwater storage pond. The sampling device comprises a floating assembly (1), a limiting assembly (2), a sampling opening (3), a sampling pipe (4) and a counter weight (5), the floating assembly (1) is connected with the limiting assembly (2), one end of the sampling port (3) is connected with the floating assembly (1), the other end of the sampling port (3) is connected with the counter weight (5), the sampling port (3) is in a hollow ball shape, part is provided with a hollow hole, and the other part without the hollow hole is connected with the sampling pipe (4). Compared with the prior art, the sampling position can be changed along with the change of the liquid level of the storage pond, and the surface rainwater can be monitored in real time.

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Description

Technical Field

[0001] The utility model relates to the technical field of rainwater storage on-line monitoring, in particular to a sampling device for a rainwater storage tank. Background Art

[0002] In response to the call for promoting the construction of sponge cities and minimizing the impact of urban development and construction on the ecological environment, measures such as infiltration, retention, storage, purification, utilization, and drainage are adopted to locally consume and utilize most of the rainfall, and the target of controlling the total runoff volume is achieved. All over the country, storage tanks have been built to detain and store rainwater. As a rainwater source storage structure itself, the storage tank stores a large amount of initial rainwater during the storage process. Since the initial rainwater contains various pollutants with high contents, it may cause that after the rainwater storage tank is full of water and overflows, the excessive pollutants may be directly discharged into the river without treatment, thus causing river pollution. At present, for the equipment of water quality on-line monitoring, most of its sampling points are fixedly installed, and only the water samples at a certain fixed position can be collected for monitoring. However, the water level of the storage tank will change continuously with the rainfall process, and the water samples that need to be monitored in the storage tank should be the upper surface rainwater that may overflow. In addition, after each sampling is completed, a small amount of rainwater and pollutants will remain in the sampling system. If not removed, it will block the sampling device and contaminate the samples for the next sampling. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a sampling device for a rainwater storage tank, which can change the sampling position along with the change of the liquid level of the storage tank.

[0004] The purpose of the utility model can be realized by the following technical solutions: A sampling device for a rainwater storage tank includes a floating component, a limiting component, a sampling port, a sampling pipe, and a counterweight;

[0005] The floating component is connected to the limiting component. One end of the sampling port is connected to the floating component, and the other end is connected to the counterweight. The sampling port is in a hollow spherical shape, and part of it is provided with hollow holes. The other part without hollow holes is connected to the sampling pipe.

[0006] Preferably, part of the sampling port is a stainless steel mesh, and the other part is a sealed stainless steel. The stainless steel mesh is provided with hollow holes, and the sealed stainless steel is connected to the sampling pipe.

[0007] More preferably, half of the sampling port is a stainless steel mesh, and the other half is a sealed stainless steel. The stainless steel mesh and the sealed stainless steel are respectively located on the left and right sides of the sampling port. The top end of the sampling port is connected to the floating component through a connecting rope, and the bottom end is connected to the counterweight.

[0008] More preferably, the diameter of the hollow holes is not more than 2 mm.

[0009] Preferably, the limiting component is a fixing rope, the top end of the fixing rope is fixed to the top of the rainwater storage tank, and the bottom end is connected to the floating component.

[0010] Further preferably, the fixing rope is a flexible steel wire.

[0011] Preferably, the sampling pipe is a hollow flexible hose, one end is connected to the sampling port, and the other end is connected to the sampling pump.

[0012] Further preferably, the sampling pump is a two-way pump.

[0013] Further preferably, the sampling pump is connected to an on-line water quality monitoring system.

[0014] Preferably, the floating component is a floating ball.

[0015] Preferably, the limiting component includes a floating rod and a limiting rod. The limiting rod is erected on the top of the rainwater storage tank and is provided with a limiting hole. The top end of the floating rod extends out of the limiting hole, and the bottom end is connected to the floating component.

[0016] Further preferably, a limiting boss for preventing the floating rod from detaching from the limiting rod is provided at the top end of the floating rod.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] 1. Through the cooperative setting of the floating component, the sampling port and the counterweight, the device can change the sampling position along with the change of the liquid level in the storage tank;

[0019] 2. The floating component of the utility model can drive the sampling port to change along with the change of the liquid level in the storage tank, and can sample the upper surface rainwater that may cause overflow. By setting the counterweight and the connecting rope, the sampling port can be located at a preset depth below the rainwater surface to achieve accurate sampling;

[0020] 3. Through the structural design of the sampling port, large particle impurities can be intercepted while ensuring sample injection, reducing the risk of device blockage;

[0021] 4. Through the design of the limiting component, the floating component can be prevented from driving the sampling port, the counterweight, etc. to drift out of the target sampling area, playing a certain limiting role;

[0022] 5. Through the design of the two-way sampling pump, the residual rainwater and impurities in the sampling pipe and the sampling port can be cleaned, preventing blockage and preventing pollution of the water sample used next time;

[0023] 6. The device of the utility model can change the sampling position along with the change of the liquid level in the storage tank, can monitor the surface rainwater in real time and can complete backwashing. Description of the Drawings

[0024] Figure 1 Schematic diagram of a rainwater storage tank sampling device of the present utility model under dry weather conditions;

[0025] Figure 2 Schematic diagram of a rainwater storage tank sampling device of the present utility model under rainfall conditions;

[0026] Figure 3 Schematic diagram of a rainwater storage tank sampling device of the present utility model under backwashing conditions;

[0027] Figure 4 Schematic structural diagram of a rainwater storage tank sampling device of the present utility model;

[0028] In the figure: 1 - floating assembly, 2 - limiting assembly, 3 - sampling port, 4 - sampling pipe, 5 - counterweight, 6 - connecting rope, 7 - sampling pump. Specific embodiments

[0029] The present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present utility model, and the detailed implementation manners and specific operation processes are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0030] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] Some embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0032] Embodiment 1

[0033] A rainwater storage tank sampling device includes a floating assembly 1, a limiting assembly 2, a sampling port 3, a sampling pipe 4, and a counterweight 5.

[0034] Among them, the floating assembly 1 is connected to the limiting assembly 2 and the sampling port 3. One end of the sampling port 3 is connected to the floating assembly 1, and the other end is connected to the counterweight 5. The sampling port 3 is in a hollow spherical shape, with half of it provided with hollow holes and the other half without hollow holes and connected to the sampling pipe 4.

[0035] Embodiment 2

[0036] A rainwater storage tank sampling device, the floating assembly 1 is a floating ball, the limiting assembly 2 is a fixing rope, the top of the sampling port 3 is connected to the floating ball through the connecting rope 6, and the bottom is connected to the counterweight 5. One end of the fixing rope is fixed to the top of the rainwater storage tank, and the other end is connected to the floating ball, which can prevent the floating ball from drifting out of the target area.

[0037] Moreover, in this embodiment, the sampling pipe 4 is a hollow flexible pipe, one end of which is connected to the sampling port 3, and the other end is connected to the sampling pump 7. The sampling pump 7 is a two-way pump, which can not only sample through the sampling port 3 and the sampling pipe 4, but also flush clean water in the reverse direction through the sampling port 3 and the sampling pipe 4 to clean the residual rainwater and impurities in the sampling pipe 4 and the sampling port 3, preventing blockage and preventing pollution of the water sample used next time. The rest is the same as that of Embodiment 1.

[0038] Embodiment 3

[0039] For a rainwater storage tank sampling device, the floating assembly 1 is a floating ball. The top end of the sampling port 3 is connected to the floating ball through a connecting rope 6, and the bottom end is connected to a counterweight 5.

[0040] As Figure 4 shown, the limiting assembly 2 includes a floating rod and a limiting rod. The limiting rod frame is installed on the top of the rainwater storage tank and is provided with a limiting hole. The top end of the floating rod extends out of the limiting hole and is provided with a limiting boss for preventing the floating rod from detaching from the limiting rod. The bottom end of the floating rod is connected to the floating ball. The sampling device is generally arranged near the pool wall of the storage tank. Through this design, the floating ball can float up and down, and the left and right offset of the floating ball can be minimized as much as possible, improving the stability of the sampled water quality, reducing the influence of the turbulence around the pool wall of the storage tank, and being beneficial to accurately sampling the water sample in the target area of the storage tank.

[0041] Moreover, in this embodiment, the sampling pipe 4 is a hollow flexible pipe, one end of which is connected to the sampling port 3, and the other end is connected to the sampling pump 7. The sampling pump 7 is a two-way pump, which can not only sample through the sampling port 3 and the sampling pipe 4, but also flush clean water in the reverse direction through the sampling port 3 and the sampling pipe 4 to clean the residual rainwater and impurities in the sampling pipe 4 and the sampling port 3, preventing blockage and preventing pollution of the water sample used next time. The rest is the same as that of Embodiment 1.

[0042] Embodiment 4

[0043] A rainwater storage tank surface liquid level sampling device and its online monitoring system. It includes a sampling port 3, a connecting rope 6, a counterweight 5, a floating ball (floating assembly 1); a fixing rope (limiting assembly 2), a sampling pipe 4, and a sampling pump 7 (two-way pump).

[0044] Introduction to the rainwater storage tank surface liquid level sampling device and its online monitoring system:

[0045] The sampling port 3 is spherical, half of which is made of stainless steel mesh with voids no larger than 2 mm, and half is sealed stainless steel. A connecting rope 6 is provided at the upper part, a counterweight 5 is provided at the lower part, and a sampling tube 4 is provided in the middle (sealed part). One end of the connecting rope 6 is connected to the sampling port 3, and the other end is connected to a floating ball. The length of the connecting rope 6 can be adjusted according to the sampling requirements. For example, if it is necessary to take water samples 10 cm - 20 cm below the liquid level of the storage tank, the length of the connecting rope 6 is set to 5 - 15 cm. One end of the floating ball is provided with the connecting rope 6, and the other end is provided with a fixing rope. The fixing rope is made of flexible steel wire, one end is connected to the floating ball, and the other end is fixed to the top of the storage tank. The length of the fixing rope is adjusted according to the operation (sedimentation) situation of the storage tank. Generally, the length is adjustable: the net height of the storage tank - the diameter of the floating ball - the length of the connecting rope - 30 - 100 cm (the sedimentation height of the storage tank). The sampling tube 4 is a hollow flexible hose, one end is connected to the sampling port 3, and the other end is connected to a sampling pump 7 (a two-way pump).

[0046] As Figure 1 shown, in the dry season condition: the storage tank is not in use, the system is stationary, and the sampling port 3 is 30 - 100 cm away from the bottom of the tank (determined by the length of the fixing rope).

[0047] As Figure 2 shown, in the rainfall condition: water enters the regulating tank, and the liquid level in the tank continuously rises and gradually exceeds the sampling port 3. When the liquid level reaches a certain height of the floating ball, the floating ball floats up as the liquid level rises. Due to the counterweight 5 and the connecting rope 6, the sampling port 3 is always 10 - 20 cm below the liquid level (determined by the length of the connecting rope 6). The sampling pump 7 starts to work. After the large - particle impurities on the surface rainwater of the storage tank are intercepted by the stainless steel mesh of the sampling port 3, it passes through the sampling port 3 and the sampling tube 4, and is transported by the sampling pump 7 to the water quality online monitoring system for real - time online monitoring of the water quality. When the liquid level height in the storage tank is close to the overflow liquid level, it is decided whether to close the inlet gate according to the online water quality data. If the water quality meets the river discharge standard, the gate is not closed, and the rainwater can overflow into the river. If the water quality does not meet the river discharge standard, the gate is closed, and the rainwater is temporarily stored in the storage tank, and the rainwater is lifted to the sewage pipe network by the sewage lift pump. Ensure that the surface rainwater of the storage tank is not discharged exceeding the standard.

[0048] As Figure 3 shown, in the backwashing condition: after the rainwater in the storage tank recedes, the fixing rope returns to the "taut" state, and the sampling pump 7 starts to rotate in reverse, and the clean water is transported in the reverse direction through the sampling tube 4 to the sampling port 3 for discharge, cleaning the residual rainwater and impurities in the sampling tube 4 and the sampling port 3 to prevent blockage and prevent pollution of the water samples for the next use.

[0049] Through this device, it is possible to realize real - time monitoring of the water quality of the surface rainwater in the storage tank, ensure that the rainwater in the storage tank does not overflow exceeding the standard, and at the same time, through the backwashing system, it can ensure that the online monitoring system is not blocked and the water sample data is not polluted.

[0050] The above description of the embodiments is to enable those of ordinary skill in the art to understand and use the utility model. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative efforts. Therefore, the utility model is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the utility model according to the disclosure of the utility model should be within the protection scope of the utility model.

Claims

1. A rainwater storage tank sampling device, characterized in that: It comprises a floating component (1), a limiting component (2), a sampling port (3), a sampling tube (4) and a counterweight (5); The floating component (1) is connected to the limiting component (2); one end of the sampling port (3) is connected to the floating component (1) and the other end is connected to the counterweight (5); the sampling port (3) is in the shape of a hollow sphere, part of which is provided with a hollow hole, and the other part without a hollow hole is connected to the sampling tube (4).

2. The rainwater storage tank sampling device according to claim 1, characterized in that: The sampling port (3) is partially made of a stainless steel mesh and the other part is made of sealed stainless steel. The stainless steel mesh is provided with hollow holes, and the sealed stainless steel is connected to the sampling tube (4).

3. The rainwater storage tank sampling device according to claim 2 is characterized in that: Half of the sampling port (3) is a stainless steel mesh and the other half is sealed stainless steel. The stainless steel mesh and the sealed stainless steel are respectively located on the left and right sides of the sampling port (3). The top of the sampling port (3) is connected to the floating assembly (1) via a connecting rope (6), and the bottom is connected to a counterweight (5).

4. The rainwater storage tank sampling device according to claim 1, characterized in that: The limiting component (2) is a fixed rope, the top end of which is fixed to the top of the rainwater storage tank and the bottom end of which is connected to the floating component (1).

5. The rainwater storage tank sampling device according to claim 4, characterized in that: The fixing rope is a flexible steel wire.

6. The rainwater storage tank sampling device according to claim 1, characterized in that: The sampling tube (4) is a hollow hose, one end of which is connected to the sampling port (3) and the other end of which is connected to the sampling pump (7).

7. The rainwater storage tank sampling device according to claim 6, characterized in that: The sampling pump (7) is a bidirectional pump, and the sampling pump (7) is connected to an online water quality monitoring system.

8. The rainwater storage tank sampling device according to claim 1, characterized in that: The floating component (1) is a floating ball.

9. The rainwater storage tank sampling device according to claim 1, characterized in that: The limit assembly (2) comprises a floating rod and a limit rod. The limit rod frame is arranged on the top of the rainwater storage tank and is provided with a limit hole. The top end of the floating rod extends out of the limit hole, and the bottom end is connected to the floating assembly (1).

10. The rainwater storage tank sampling device according to claim 9, characterized in that: The top end of the floating rod is provided with a limiting boss for preventing the floating rod from being separated from the limiting rod.