A wastewater sampling device

Abstract

This utility model discloses a wastewater sampling device, including a sampling pump, a buffer assembly comprising a sealed tank and a vacuum pump. The top of the sealed tank is connected to the vacuum pump via a connecting pipe; the bottom of the sealed tank is connected to an inlet pipe and an outlet pipe, the outlet pipe being connected to the sampling pump; a filter assembly is disposed between the outlet pipe and the sampling pump for filtering the sampled wastewater. This utility model solves the problems of existing sampling devices easily clogging the sampling pipe, requiring repeated cleaning which is time-consuming, labor-intensive, and difficult. The sealed tank and vacuum pump allow the vacuum pump to quickly draw wastewater into the sealed tank, shortening the sampling time. The large volume of the sealed tank provides sufficient space to hold wastewater samples, continuously supplying samples for subsequent sampling pumps, reducing the frequency of wastewater extraction, and improving sampling efficiency. Workers can take multiple samples from the sealed tank containing wastewater samples anytime, anywhere, overcoming the geographical limitations of wastewater sampling.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a wastewater sampling device. Background Technology

[0002] Wastewater treatment is an essential task in the world today. Due to the scarcity of available water resources on Earth, the amount of water available to people is decreasing as it is consumed. If water resources are not conserved, it will have very serious consequences. Not only should water resources be conserved, but also the available water resources for recycling should be treated.

[0003] To treat water resources, we need to sample some wastewater. Most existing sampling equipment uses syringe-like products. Workers insert the sampling tube into the wastewater. However, due to the large amount of impurities in the wastewater, the sampling tube is easily blocked during the sampling process, affecting subsequent sampling. Workers often need to clean the sampling tube repeatedly to complete the task. In addition, if impurities directly enter the sampling tube, the internal structure of the sampling shell is relatively complex, which increases the difficulty of cleaning and reduces the cleaning effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sewage sampling device that solves the problem that existing sampling devices are prone to direct blockage of the sampling tube, requiring repeated cleaning which is time-consuming, labor-intensive, and difficult.

[0005] This utility model is achieved through the following technical solution:

[0006] A wastewater sampling device, comprising:

[0007] Sampling pump,

[0008] A buffer assembly includes a sealed container and a vacuum pump. The top of the sealed container is connected to the vacuum pump via a connecting pipe. The sealed container is connected to an inlet pipe and an outlet pipe, and the outlet pipe is connected to a sampling pump.

[0009] The filter assembly, located between the sample outlet pipe and the sampling pump, is used to filter the sampled wastewater.

[0010] As one of the preferred technical solutions, the filtration assembly includes an outer cylinder, a filter cylinder, and a cover plate. The cover plate is detachably installed on the top of the outer cylinder. The filter cylinder is disposed inside the outer cylinder and fixedly installed on the cover plate. The top of the cover plate has an inlet that communicates with the filter cylinder, and the sample outlet is connected to the inlet. One side of the outer cylinder is connected to a sampling pump.

[0011] As one of the preferred technical solutions, the filter cartridge is connected to a drive assembly, which includes a splined shaft, a splined sleeve, and a rotating brush.

[0012] The splined shaft is rotatably mounted inside the bottom of the outer cylinder;

[0013] The spline sleeve is connected to the bottom of the filter cylinder and engages with the spline shaft.

[0014] The rotating brush is rotatably mounted inside the filter cylinder and is fixedly connected to the spline sleeve.

[0015] As one of the preferred technical solutions, a drive motor is connected to one end of the spline shaft.

[0016] As one of the preferred technical solutions, a sealing strip is provided between the cover plate and the outer cylinder.

[0017] As one of the preferred technical solutions, the cover plate has an annular groove, the sealing strip is disposed in the annular groove, and the bottom of the outer cylinder is provided with an annular locking block that matches the annular groove.

[0018] As one of the preferred technical solutions, both the sample inlet tube and the sample outlet tube are equipped with one-way valves.

[0019] As one of the preferred technical solutions, an overflow valve is provided on the connecting pipe.

[0020] As one of the preferred technical solutions, a control component is provided on the upper side of the sealed tank to monitor the sewage level inside the sealed tank and control the operation of the vacuum pump.

[0021] As one of the preferred technical solutions, the control component includes a liquid level sensor and a controller. The liquid level sensor is disposed at the top inside the sealed container, and the controller is disposed on the outside side of the sealed container. The controller is connected to the liquid level sensor and the vacuum pump respectively, and is used to receive the signal from the liquid level sensor and control the vacuum pump to open or close.

[0022] Compared with the prior art, this utility model has the following advantages and beneficial effects:

[0023] 1. Using a sealed tank as a buffer device avoids direct contact between the sampling port, impeller, and shaft of the sampling pump and the sewage, preventing clogging or entanglement of residue or fibrous materials. In addition, a filter assembly is installed between the window of the sealed tank and the sampling pump to prevent impurities from entering the sampling port of the sampling pump and causing blockage, reducing cleaning difficulty and ensuring the normal operation of the sampling work.

[0024] 2. By setting up a sealed container and a vacuum pump, the vacuum pump removes air from the sealed container, creating a negative pressure environment where the internal pressure is lower than the external atmospheric pressure. This allows wastewater to be quickly drawn into the sealed container, shortening the sampling time. Furthermore, the sealed container combined with the vacuum pump enables remote automated sampling, eliminating the need for operators to directly contact wastewater or harmful gases.

[0025] 3. The sealed container has a large volume, so it has enough space to hold the sewage sample and can continuously supply the sampling pump for subsequent sampling, reducing the frequency of sewage extraction and improving the efficiency of sampling work.

[0026] 4. Staff can take multiple samples from the sealed container containing the wastewater sample at any time and place, overcoming the geographical limitations of wastewater sampling and providing greater convenience for the sampling work. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the exemplary embodiments of this utility model, the drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this utility model and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort. In the drawings:

[0028] Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Figure 2 This is a schematic diagram of the internal structure of the outer cylinder of this utility model;

[0030] Figure 3 This is a schematic diagram showing the fit between the cover plate and the outer cylinder of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the cover plate of this utility model;

[0032] Figure 5 This is a cross-sectional view of the sealing container of this utility model.

[0033] The attached diagram shows the markings and corresponding component names:

[0034] 1-Sampling pump, 2-Sealed container, 3-Vacuum pump, 4-Inlet pipe, 5-Outlet pipe, 6-Connecting pipe, 7-Filter assembly, 71-Outer cylinder, 72-Filter cylinder, 73-Liquid inlet, 8-Drive assembly, 81-Splined shaft, 82-Splined sleeve, 83-Rotating brush, 9-Drive motor, 10-Sealing strip, 11-Annular groove, 12-Annular retaining block, 13-One-way valve, 14-Overflow valve, 15-Control assembly, 151-Level sensor, 152-Controller, 16-Cover plate. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are for explanation only and are not intended to limit the scope of the utility model. The following specific examples illustrate the implementation of this utility model, and those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0036] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product size. It is understandable that some well-known structures and their descriptions in the drawings may be omitted in the drawings by those skilled in the art.

[0037] Example 1

[0038] Most existing sampling equipment uses syringe-like products. Workers insert the sampling tube into the sewage. However, due to the large amount of impurities in the sewage, the sampling tube is prone to blockage during the sampling process, affecting subsequent sampling. Workers often need to clean the sampling tube repeatedly to complete the task. In addition, if impurities directly enter the sampling tube, the internal structure of the sampling shell is relatively complex, which increases the difficulty of cleaning and reduces the cleaning effect.

[0039] To address the above problems, this utility model provides a wastewater sampling device, such as... Figure 1 As shown, it includes:

[0040] Sampling pump 1,

[0041] The buffer assembly includes a sealed container 2 and a vacuum pump 3. The top of the sealed container 2 is connected to the vacuum pump 3 via a connecting pipe 6. The sealed container 2 is connected to an inlet pipe 4 and an outlet pipe 5. The outlet pipe 5 is connected to a sampling pump 1.

[0042] The filter assembly 7 is located between the sample outlet pipe 5 and the sampling pump 1 and is used to filter the sampled wastewater.

[0043] In this embodiment, the inlet tube 4 is located at the bottom of the sealed container 2, and the outlet tube 5 is located at the lower right side of the sealed container 2. When the inlet tube 4 in the sealed container 2 is inserted into the sewage, the sewage and impurities can smoothly enter the sealed container 2 because the diameter of the inlet tube 4 is larger than that of the existing sampling tube. Additionally, this embodiment also includes a vacuum pump 3. The effect is as follows: when the vacuum pump 3 is activated and connected to the sealed container 2, the vacuum pump 3 extracts air from the sealed container 2, making the internal pressure of the sealed container 2 lower than the external atmospheric pressure, creating a negative pressure environment. Then, through the principle of vacuum adsorption, the sewage is lifted from the low-lying area to the sampling point, overcoming the limitations of gravity. Furthermore, the vacuum pump 3 has a fast pumping speed and strong flushing effect, which can quickly draw sewage into the sealed container 2, shortening the sampling time.

[0044] Finally, the wastewater and impurities enter the sealed container 2 together through the inlet pipe 4. The sampled wastewater and impurities are stored in the sealed container 2. When the staff needs to take samples, they turn on the sampling pump 1. The wastewater and impurities flow out through the outlet pipe 5 and are then filtered by the filter assembly 7. Finally, they enter the sampling port of the sampling pump 1 and flow into the sampling bottle for sampling.

[0045] Furthermore, it is known that existing samplers have small volumes, requiring frequent scooping, increasing sampling time, and reducing sampling efficiency. During scooping, manual valve opening or contact with sewage is necessary, posing a risk of infection. However, in this embodiment, the sewage sampling process involves collecting wastewater into a sealed tank 2, then sequentially passing it through a filter assembly 7, and finally sampling it through a sampling pump 1. It is known that the sealed tank 2 in this embodiment has a large volume, thus providing sufficient space to hold the sewage sample and continuously supplying the subsequent sampling pump 1, reducing the frequency of sewage extraction and improving sampling efficiency. In addition, the sealed tank 2, in conjunction with a vacuum pump 3, enables remote automated sampling, eliminating the need for operators to directly contact sewage or harmful gases.

[0046] As a buffer device, the sealed container 2 has two advantages: firstly, the large diameter of the inlet pipe 4 allows the sewage to enter smoothly into the sealed container 2; secondly, the sealed container 2 can seal and store large-volume sewage samples. Its function is that, currently, when staff collect sewage samples at different times, they need to collect samples at specific locations (sewage pools). However, after storing the sewage samples, staff can collect samples multiple times at any time from the sealed container 2 containing the sewage samples, overcoming the geographical limitations of sewage sampling and providing greater convenience for the sampling work.

[0047] Furthermore, both the inlet tube 4 and the outlet tube 5 are equipped with one-way valves 13. The one-way valve 13 uses a spring-return conical valve core, allowing wastewater to flow only from the inlet tube 4 into the sealed container 2. Additionally, the one-way valve 13 body is equipped with a breather hole and a hydrophobic filter membrane to balance the air pressure inside and outside the valve after sampling. This prevents wastewater from flowing out of the sealed container 2 under gravity and causing adverse effects after the vacuum pump 3 stops operating.

[0048] Example 2

[0049] Since the sealed tank 2 and the vacuum pump 3 are connected, when the sealed tank 2 is full of sewage, the continuous operation of the vacuum pump 3 may cause the sewage to be drawn into the vacuum pump 3, thus contaminating the vacuum pump 3. Based on Example 1, as... Figure 5 As shown, in this embodiment, a control component 15 is installed on the upper side of the sealed tank 2 to monitor the sewage level inside the sealed tank 2 and control the operation of the vacuum pump 3. Specifically, the control component 15 is used to ensure the safety of the vacuum pump 3 and prevent sewage from flowing into the vacuum pump 3 through the connecting pipe 6.

[0050] Furthermore, the control component 15 includes a liquid level sensor 151 and a controller 152. The liquid level sensor 151 is disposed at the top inside the sealed container 2, and the controller 152 is disposed on the outside side of the sealed container 2. The controller 152 is connected to the liquid level sensor 151 and the vacuum pump 3 respectively, and is used to receive the signal from the liquid level sensor 151 and control the vacuum pump 3 to open or close.

[0051] The working process of the control component 15 is as follows: The liquid level sensor 151 is an ultrasonic or capacitive liquid level sensor that monitors the liquid level in the sealed tank 2 in real time. When the liquid level reaches the preset threshold (such as 80%-90% of the tank volume), the controller 152 is triggered to shut down the vacuum pump 3 and lock the tank valve to avoid overload or overflow, and at the same time to avoid excessive vacuuming that could damage the equipment.

[0052] In addition, the ultrasonic level sensor is model DS200 or the capacitive level sensor is model FS-IR1902D, and the controller 152 is model Siemens S7-1200 series.

[0053] Furthermore, an overflow valve 14 is also provided on the connecting pipe 6. The overflow valve 14 can prevent sewage from entering the vacuum pump 3. When the liquid level sensor 151 fails, the overflow valve 14 acts as a second protection structure to protect the vacuum pump 3.

[0054] Example 3

[0055] Based on Example 1, such as Figure 2 and Figure 3 As shown, in this embodiment, the filter assembly 7 includes an outer cylinder 71, a filter cylinder 72, and a cover plate 16. The cover plate 16 is detachably installed on the top of the outer cylinder 71. The filter cylinder 72 is disposed inside the outer cylinder 71 and fixedly installed on the cover plate 16. The top of the cover plate 16 has an inlet 73 that communicates with the filter cylinder 72, and the sample outlet pipe 5 communicates with the inlet 73. One side of the outer cylinder 71 is connected to the sampling pump 1.

[0056] In this embodiment, the function of the filter assembly 7 is to achieve solid-liquid separation. When the wastewater from the sealed tank 2 is pumped out, it is filtered and then passed through the sampling pump 1, ultimately preventing the sampling port of the sampling pump 1 from becoming blocked to ensure the continuous operation of the sampling work.

[0057] The top of the filter cylinder 72 is open and corresponds to the position of the liquid inlet 73. The diameter of the filter cylinder 72 is not smaller than the diameter of the liquid inlet 73, so that the sewage in the sample outlet 5 can accurately enter the filter cylinder 72. In addition, multiple filter holes are evenly distributed on the side wall and bottom of the filter cylinder 72 for solid-liquid separation.

[0058] The specific process is as follows: Sampling pump 1 is started. When the sewage enters the filter cylinder 72, solid impurities are intercepted inside the filter cylinder 72, while the filtered sewage flows into the outer cylinder 71 space. The sewage flowing into the outer cylinder 71 reaches the sampling bottle for sampling via sampling pump 1.

[0059] During this process, a certain amount of solid impurities will accumulate inside the filter cartridge 72. If it is not cleaned for a long time, it will affect the flow of sewage. In order to facilitate the cleaning of the filter cartridge 72, the cover plate 16 and the outer cylinder 71 can be detached and installed. The cover plate 16 can be removed together with the filter cartridge 72. After removal, the impurities in the filter cartridge 72 are poured out from the liquid inlet 73 and cleaned.

[0060] It is known that existing sampling equipment often installs a filter screen in the sampling tube to prevent impurities from entering. Inevitably, when the sewage in the sealed tank 2 enters the filter cylinder 72, the solid impurities in the sewage are very likely to clog the filter cylinder 72. The clogging of the filter cylinder 72 is not conducive to the normal flow of sewage. If the sampling pump 1 is used directly for sampling, there may be a situation where the pump burns out.

[0061] Based on this, the filter cartridge 72 is connected to a drive assembly 8, which includes a splined shaft 81, a splined sleeve 82, and a rotating brush 83.

[0062] The splined shaft 81 is rotatably mounted inside the bottom of the outer cylinder 71;

[0063] The spline sleeve 82 is connected to the bottom of the filter cylinder 72 and is splined with the spline shaft 81;

[0064] The rotating brush 83 is rotatably disposed inside the filter cylinder 72 and is fixedly connected to the spline sleeve 82.

[0065] Specifically, the purpose of the drive component 8 is to achieve the rotation of the rotating brush 83. Simultaneously, the rotating brush 83 abuts against the inner wall of the filter cylinder 72. As the brush 83 rotates, it agitates the inner wall of the filter cylinder 72, accelerating the rate of solid-liquid separation of wastewater. Furthermore, the rotating brush 83 can scrape off solid impurities adhering to the filter cylinder 72, reducing the degree of clogging and further accelerating the flow rate of wastewater. It should be noted that the rotating brush 83 is a soft-bristled brush, which minimizes damage to the inner wall of the filter cylinder 72.

[0066] The working process of the drive component 8 is as follows: the spline shaft 81 rotates, driving the spline sleeve 82 that it mates with to rotate, which in turn drives the rotating brush 83 to rotate. The specific principle is as follows: multiple longitudinal teeth are distributed on the surface of the spline shaft 81. The shape of the longitudinal teeth can be rectangular, involute, or triangular. The inner wall of the spline sleeve 82 has corresponding grooves. The two are connected by the engagement of the teeth and grooves. The spline engagement of the spline shaft 81 and the spline sleeve 82 achieves torque transmission and precise positioning through multi-tooth engagement.

[0067] In addition, the purpose of setting the spline shaft 81 and spline sleeve 82 to cooperate is that, in subsequent processing, the filter cylinder 72 needs to be removed for cleaning. Since the keyway clearance allows the spline sleeve 82 to move axially while maintaining circumferential fixation, the spline sleeve 82 can be rotatably installed at the bottom of the filter cylinder 72 and fixedly connected to the rotating brush 83, and can be removed together with the filter cylinder 72 to the outer cylinder 71 for cleaning.

[0068] Furthermore, one end of the splined shaft 81 is connected to a drive motor 9. Specifically, the drive motor 9 drives the splined shaft 81 to rotate, providing power for the subsequent rotation of the rotating brush 83. It is understood that a protective box is provided at the bottom of the outer cylinder 71, and the drive motor 9 is housed inside the protective box, improving overall safety.

[0069] Furthermore, since the cover plate 16 and the outer cylinder 71 are detachable, frequent opening and closing over a long period will reduce the sealing performance of the outer cylinder 71. Therefore, in this embodiment, a sealing strip 10 is provided between the cover plate 16 and the outer cylinder 71. The sealing strip 10 fills the tiny gaps at the interface of the equipment through compression deformation, forming a molecular-level contact barrier. On the one hand, the sealing strip 10 prevents sewage leakage during transportation, thus avoiding environmental pollution; on the other hand, the sealing strip 10 increases the tightness of the connection between the cover plate 16 and the outer cylinder 71.

[0070] In addition, such as Figure 3 and Figure 4As shown, the cover plate 16 and the outer cylinder 71 are detachably installed as follows: the cover plate 16 has an annular groove 11, the sealing strip 10 is disposed in the annular groove 11, and the bottom of the outer cylinder 71 is provided with an annular locking block 12 that matches the annular groove 11. Specifically, the lower surface of the cover plate 16 is machined with a trapezoidal cross-section annular groove 11 with a depth of 3-5mm and a tolerance of ±0.05mm. The width of the groove bottom is 1.2-1.5 times wider than the groove opening, forming a self-locking wedge-shaped space.

[0071] The top of the outer cylinder 71 has an integrally formed annular locking block 12, which complements the tapered shape of the annular groove 11. The surface of the annular locking block 12 is rolled and strengthened (hardness HRC55-60), and it will generate 0.1-0.3mm of elastic deformation when inserted, forming an initial preload. In addition, three sets of circumferentially evenly distributed dovetail-shaped anti-shear bosses (height 2mm, slope 1:10) can be set on the outer edge of the annular locking block 12, which form a mechanical engagement with the corresponding grooves in the annular groove 11. This makes it difficult for the cover plate 16 to fall out of the outer cylinder 71.

[0072] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above description is only a specific embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sewage sampling apparatus, characterised in that, include: Sampling pump, The buffer assembly includes a sealed container and a vacuum pump, the top of which is connected to the vacuum pump via a connecting pipe; the sealed container is connected to an inlet pipe and an outlet pipe, and the outlet pipe is connected to a sampling pump; The filter assembly, located between the sample outlet pipe and the sampling pump, is used to filter the sampled wastewater.

2. The sewage sampling apparatus of claim 1, wherein, The filtration assembly includes an outer cylinder, a filter cylinder, and a cover plate. The cover plate is detachably installed on the top of the outer cylinder. The filter cylinder is disposed inside the outer cylinder and fixedly installed on the cover plate. The top of the cover plate has an inlet that communicates with the filter cylinder, and the sample outlet is connected to the inlet. One side of the outer cylinder is connected to a sampling pump.

3. The sewage sampling apparatus of claim 2, wherein, The filter cartridge is connected to a drive assembly, which includes a splined shaft, a splined sleeve, and a rotating brush. The splined shaft is rotatably mounted inside the bottom of the outer cylinder; The spline sleeve is connected to the bottom of the filter cylinder and engages with the spline shaft. The rotating brush is rotatably mounted inside the filter cylinder and is fixedly connected to the spline sleeve.

4. The sewage sampling apparatus of claim 3, wherein, One end of the splined shaft is connected to a drive motor.

5. The sewage sampling apparatus of claim 2, wherein, A sealing strip is provided between the cover plate and the outer cylinder.

6. The sewage sampling apparatus of claim 2, wherein, The cover plate has an annular groove, the sealing strip is set in the annular groove, and the bottom of the outer cylinder is provided with an annular locking block that matches the annular groove.

7. The sewage sampling apparatus of claim 1, wherein, Both the inlet and outlet tubes are equipped with one-way valves.

8. The sewage sampling apparatus of claim 1, wherein, An overflow valve is installed on the connecting pipe.

9. The sewage sampling apparatus of claim 1, wherein, A control component is installed on the upper side of the sealed tank to monitor the sewage level inside the sealed tank and control the operation of the vacuum pump.

10. The sewage sampling apparatus of claim 9, wherein, The control assembly includes a liquid level sensor and a controller. The liquid level sensor is located at the top inside the sealed container, and the controller is located on the outside of the sealed container. The controller is connected to both the liquid level sensor and the vacuum pump, and is used to receive signals from the liquid level sensor and control the vacuum pump to turn on or off.

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