A stratified sampling device for wastewater testing

Abstract

This utility model relates to the field of wastewater testing and sampling, and discloses a stratified sampling device for wastewater testing. It includes a wastewater sampling pool, with a sampling switching mechanism and a mixing mechanism at the top. The sampling switching mechanism includes a sampling cylinder, with a sampling tube fixedly connected to the inner wall of the sampling cylinder. A sealing lifting rod is slidably connected to the inner wall of the sampling tube, and a sealing ball is fixedly connected to the bottom end of the sealing lifting rod. A support plate is elastically connected to the top of the sampling tube via a spring. In this utility model, by setting up a sampling switching mechanism, the sampling tube is precisely delivered to the target stratification positions at different depths within the wastewater pool, ensuring that the obtained samples accurately correspond to each stratum within the wastewater pool. This greatly improves the accuracy of stratified sampling, avoids cross-contamination between samples from different strata, and allows for rapid collection of multi-layer wastewater samples, significantly improving the efficiency of stratified sampling while ensuring that each sample is independent and complete.

Description

Technical Field

[0001] This utility model relates to the field of wastewater testing and sampling, and in particular to a stratified sampling device for wastewater testing. Background Technology

[0002] Wastewater testing and sampling refers to a series of standardized operations conducted to obtain representative wastewater samples in order to scientifically analyze and test indicators such as water quality, pollutant composition, and concentration.

[0003] Wastewater stratification sampling is a sampling technique for water bodies exhibiting stratification. Appropriate tools and methods must be selected based on the characteristics of the water body. Its applications include water bodies with vertical stratification and wastewater with significant density differences. The core objective is to analyze the distribution of pollutants in different water layers and provide data support for stratified treatment. Existing technologies include manual stratification sampling tools such as simple stratification samplers, plexiglass water samplers, and stratification siphon samplers; automated stratification sampling technologies include multi-depth automated samplers and vertical profile sampling systems.

[0004] In the stratified sampling process for wastewater testing, traditional manual samplers require manual operation for positioning, making it difficult to accurately control the sampling tube to a specific depth in the wastewater tank. This results in the obtained samples not accurately corresponding to each layer, leading to significant errors. While automatic sampling equipment can achieve multi-depth sampling, it typically uses fixed points or fixed intervals for sampling, lacking a flexible and precise depth adjustment mechanism. When the stratification interface of the wastewater tank changes, it is easy to cause sample misalignment. Therefore, a stratified sampling device for wastewater testing is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a stratified sampling device for wastewater testing, which aims to solve the problems of inaccurate control of stratified sampling depth and easy cross-contamination of samples in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a stratified sampling device for wastewater testing, comprising a wastewater sampling pool, wherein a sampling switching mechanism and a mixing mechanism are provided at the top of the wastewater sampling pool, the sampling switching mechanism comprises a sampling cylinder, a sampling tube is fixedly connected to the inner wall of the sampling cylinder, a sealing lifting rod is slidably connected to the inner wall of the sampling tube, a sealing ball is fixedly connected to the bottom end of the sealing lifting rod, a support plate is elastically connected to the top of the sampling tube by a spring, a pressure-bearing protrusion is fixedly connected to the bottom of the support plate, a limiting rotating plate is rotatably connected to the top of the inner wall of the sampling cylinder, a rotating shaft is fixedly connected to the bottom of the limiting rotating plate, and a lifting protrusion is fixedly connected to the outer wall of the rotating shaft.

[0007] As a further description of the above technical solution:

[0008] The bottom end of the spring is fixedly connected to the top of the sampling tube, and the top end of the spring is fixedly connected to the bottom of the support plate.

[0009] As a further description of the above technical solution:

[0010] The sampling switching mechanism also includes a support partition, the outer wall of which is fixedly connected to the inner wall of the sampling cylinder, and a bidirectional motor is fixedly connected to the top of the support partition. The top of the output end of the bidirectional motor is fixedly connected to the bottom of the rotating shaft.

[0011] As a further description of the above technical solution:

[0012] The sampling switching mechanism also includes a limiting telescopic rod, the bottom of which is fixedly connected to the top of the sampling tube, and the top of the inner rod of which is fixedly connected to the bottom of the support plate.

[0013] As a further description of the above technical solution:

[0014] The sampling switching mechanism also includes a drain pipe, the outer wall of which is fixedly connected to the outer wall of the sampling pipe.

[0015] As a further description of the above technical solution:

[0016] The sampling switching mechanism also includes a support frame, the bottom of which is fixedly connected to the top of the sewage sampling tank, and a hydraulic rod is fixedly connected to the top of the support frame, with the bottom end of the inner rod of the hydraulic rod fixedly connected to the top of the sampling cylinder.

[0017] As a further description of the above technical solution:

[0018] The mixing mechanism includes a second rotating shaft, the top end of which is fixedly connected to the bottom end of the output end of a bidirectional motor.

[0019] As a further description of the above technical solution:

[0020] The mixing mechanism also includes a mixing rod, and the bottom end of the second rotating shaft is fixedly connected to the top of the mixing rod.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, by setting a sampling switching mechanism, the sampling tube is accurately delivered to the target layer position at different depths in the sewage tank, ensuring that the obtained sample can accurately correspond to each layer in the sewage tank, which greatly improves the accuracy of layer sampling, avoids cross-contamination of samples from different layers, can quickly complete the collection of multi-layer sewage samples, greatly improves the efficiency of layer sampling, and at the same time ensures that each layer sample is independent and complete.

[0023] 2. In this utility model, by setting a mixing mechanism, the mixing rod slightly mixes the local sewage before sampling, which can make the sample to be collected more uniform and ensure that the sample taken in the same layer can truly reflect the comprehensive characteristics of the sewage in that layer, thereby improving the sample quality. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the main structure of a stratified sampling device for wastewater testing proposed in this utility model;

[0025] Figure 2 This is a front view cross-sectional view of the sampling cylinder of a stratified sampling device for wastewater testing proposed in this utility model;

[0026] Figure 3 This is a top view of the sampling cylinder structure of a stratified sampling device for wastewater testing proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the cross-sectional structure of the sampling tube of a stratified sampling device for wastewater testing proposed in this utility model.

[0028] Legend:

[0029] 1. Wastewater sampling tank; 2. Sampling switching mechanism; 211. Sampling cylinder; 212. Sampling tube; 213. Sealing lifting rod; 214. Sealing ball; 215. Spring; 216. Support plate; 217. Pressure-bearing protrusion; 218. Limiting rotating plate; 219. Rotating shaft one; 220. Lifting protrusion; 221. Support partition; 222. Bidirectional motor; 223. Limiting telescopic rod; 224. Drainage pipe; 225. Support frame; 226. Hydraulic rod; 3. Mixing mechanism; 311. Rotating shaft two; 312. Mixing rod. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Reference Figure 1 , Figure 3 , Figure 4The present invention provides an embodiment of a stratified sampling device for wastewater testing, comprising a wastewater sampling tank 1. A sampling switching mechanism 2 and a mixing mechanism 3 are provided at the top of the wastewater sampling tank 1. The sampling switching mechanism 2 includes a sampling cylinder 211, with a sampling tube 212 fixedly connected to the inner wall of the sampling cylinder 211. The sampling tube 212 is used to carry wastewater samples. A sealing lifting rod 213 is slidably connected to the inner wall of the sampling tube 212. The sealing lifting rod 213, in conjunction with a sealing ball 214, controls the opening and closing of the sampling port. A sealing ball 214 is fixedly connected to the bottom end of the sealing lifting rod 213, and the sealing ball 214 can seal the bottom sampling port of the sampling tube 212 to prevent wastewater overflow or sample contamination. The top of the sampling tube 212 is elastically connected to a spring 215. The support plate 216 and spring 215 provide reset power for the sealing lifting rod 213. The bottom of the support plate 216 is fixedly connected to the pressure protrusion 217. The pressure protrusion 217 cooperates with the lifting protrusion 220 to realize the lifting drive of the sealing lifting rod 213. The top of the inner wall of the sampling tube 211 is rotatably connected to the limiting plate 218. The opening timing of the sampling tube 212 is controlled by the position of the notch. The bottom of the limiting plate 218 is fixedly connected to the rotating shaft 219. The rotating shaft 219 acts as a power transmission component to drive the limiting plate 218 and the lifting protrusion 220 to rotate. The outer wall of the rotating shaft 219 is fixedly connected to the lifting protrusion 220. The lifting protrusion 220 squeezes the pressure protrusion 217 to push the sealing lifting rod 213 up, thereby opening the sampling port.

[0032] Reference Figures 2-4 The bottom end of spring 215 is fixedly connected to the top of sampling tube 212, and the top end of spring 215 is fixedly connected to the bottom of support plate 216. Spring 215 provides stable elastic restoring force to ensure that sealing ball 214 is reset in time after sampling. Sampling switching mechanism 2 also includes support partition 221. The outer wall of support partition 221 is fixedly connected to the inner wall of sampling tube 211. Support partition 221 provides installation support for bidirectional motor 222 to ensure structural stability. Bidirectional motor 222 is fixedly connected to the top of support partition 221. Bidirectional motor 222 serves as the power source for sampling and mixing. The top end of output of bidirectional motor 222 is fixedly connected to the bottom end of rotating shaft 219. Sampling switching mechanism 2 also includes limiting telescopic rod 223. The bottom of the sampling tube 212 is fixedly connected to the top of the sampling tube 212. The top of the inner rod of the limiting telescopic rod 223 is fixedly connected to the bottom of the support plate 216. The limiting telescopic rod 223 guides and limits the lifting and lowering of the support plate 216 to prevent displacement. The sampling switching mechanism 2 also includes a drain pipe 224. The outer wall of the drain pipe 224 is fixedly connected to the outer wall of the sampling tube 212. The drain pipe 224 facilitates the discharge of the sampled sewage. The sampling switching mechanism 2 also includes a support frame 225. The bottom of the support frame 225 is fixedly connected to the top of the sewage sampling tank 1. A hydraulic rod 226 is fixedly connected to the top of the support frame 225. The hydraulic rod 226 provides lifting power for the sampling tube 211 to achieve layered sampling. The bottom of the inner rod of the hydraulic rod 226 is fixedly connected to the top of the sampling tube 211.

[0033] Reference Figure 1 , Figure 2 , Figure 4 The mixing mechanism 3 includes a second rotating shaft 311, the top end of which is fixedly connected to the bottom end of the output end of the bidirectional motor 222. The second rotating shaft 311 transmits power from the bidirectional motor 222 to the mixing rod 312. The mixing mechanism 3 also includes a mixing rod 312, the bottom end of which is fixedly connected to the top end of the mixing rod 312. The second rotating shaft 311 stirs and mixes the sewage.

[0034] Working principle: When it is necessary to sample sewage inside the sewage sampling tank 1, the hydraulic rod 226 fixedly connected to the top of the support frame 225 is activated. The inner rod of the hydraulic rod 226 pushes the sampling cylinder 211 to descend, so that the sampling cylinder 211 carries the sampling tube 212 into the sewage sampling tank 1. After descending to the designated height, the bidirectional motor 222 is activated, so that the output end of the bidirectional motor 222 drives the fixedly connected rotating shaft 219 and rotating shaft 311 to rotate. The rotating shaft 311 rotates, and the rotating shaft 311 drives the mixing rod 312 fixedly connected to the outer wall to rotate. The mixing rod 312 can slightly mix the sewage before sampling.

[0035] When the rotating shaft 219 rotates, it causes the lifting protrusion 220 and the limiting rotating plate 218, which are fixedly connected to the outer wall of the rotating shaft 219, to rotate. This causes the notch on the limiting rotating plate 218 to rotate to the top of the designated sampling tube 212, causing the lifting protrusion 220 to press against the lifting pressure protrusion 217. This causes the support plate 216 to drive the sealing lifting rod 213 to rise. The inner rod of the limiting telescopic rod 223 follows the support plate 216 in rising and falling, thereby limiting the rise and fall of the support plate 216. This causes the sealing lifting rod 213 to drive the sealing ball 214 to rise, so that the sealing ball 214 no longer presses against the sampling tube 212. 2. The sampling port at the bottom is sealed, causing the spring 215 to deform and stretch. After sampling, the lifting protrusion 220 can be moved so that the notch on the limiting plate 218 is no longer above the sampling tube 212. The rebound force of the spring 215 can drive the support plate 216, the sealing lifting rod 213 and the sealing ball 214 to reset, so that the sealing ball 214 seals the sampling tube 212 again, thus completing one sampling. Then, the hydraulic rod 226 can be activated again to lower the sampling tube 212 to the specified height by the sampling cylinder 211 to perform sampling again, thus enabling layered sampling.

[0036] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A stratified sampling device for wastewater testing, comprising a wastewater sampling tank (1), characterized in that: The top of the wastewater sampling tank (1) is equipped with a sampling switching mechanism (2) and a mixing mechanism (3); The sampling switching mechanism (2) includes a sampling cylinder (211), a sampling tube (212) is fixedly connected to the inner wall of the sampling cylinder (211), a sealing lifting rod (213) is slidably connected to the inner wall of the sampling tube (212), a sealing ball (214) is fixedly connected to the bottom end of the sealing lifting rod (213), a support plate (216) is elastically connected to the top of the sampling tube (212) by a spring (215), a pressure-bearing protrusion (217) is fixedly connected to the bottom of the support plate (216), a limiting rotating plate (218) is rotatably connected to the top of the inner wall of the sampling cylinder (211), a rotating shaft (219) is fixedly connected to the bottom of the limiting rotating plate (218), and a lifting protrusion (220) is fixedly connected to the outer wall of the rotating shaft (219).

2. The stratified sampling device for wastewater testing according to claim 1, characterized in that: The bottom end of the spring (215) is fixedly connected to the top of the sampling tube (212), and the top end of the spring (215) is fixedly connected to the bottom of the support plate (216).

3. The stratified sampling device for wastewater testing according to claim 1, characterized in that: The sampling switching mechanism (2) also includes a support partition (221). The outer wall of the support partition (221) is fixedly connected to the inner wall of the sampling cylinder (211). A bidirectional motor (222) is fixedly connected to the top of the support partition (221). The top end of the output end of the bidirectional motor (222) is fixedly connected to the bottom end of the rotating shaft (219).

4. The stratified sampling device for wastewater testing according to claim 1, characterized in that: The sampling switching mechanism (2) also includes a limiting telescopic rod (223), the bottom of which is fixedly connected to the top of the sampling tube (212), and the top of the inner rod of the limiting telescopic rod (223) is fixedly connected to the bottom of the support plate (216).

5. A stratified sampling device for wastewater testing according to claim 1, characterized in that: The sampling switching mechanism (2) also includes a drain pipe (224), the outer wall of which is fixedly connected to the outer wall of the sampling pipe (212).

6. The stratified sampling device for wastewater testing according to claim 1, characterized in that: The sampling switching mechanism (2) also includes a support frame (225), the bottom of which is fixedly connected to the top of the sewage sampling tank (1), and a hydraulic rod (226) is fixedly connected to the top of the support frame (225). The bottom end of the inner rod of the hydraulic rod (226) is fixedly connected to the top of the sampling cylinder (211).

7. A stratified sampling device for wastewater testing according to claim 1, characterized in that: The mixing mechanism (3) includes a second rotating shaft (311), the top end of which is fixedly connected to the bottom end of the output end of a bidirectional motor (222).

8. A stratified sampling device for wastewater testing according to claim 7, characterized in that: The mixing mechanism (3) also includes a mixing rod (312), and the bottom end of the rotating shaft (311) is fixedly connected to the top of the mixing rod (312).

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