Automatic sampling device for sludge storage tank

Abstract

The utility model discloses an automatic sampling device for a sludge storage pool, which comprises a platform arranged at the upper part of the sludge storage pool, a sampling tank arranged on the platform, the upper part of the sampling tank is connected with an external vacuum pump unit through a negative pressure exhaust pipe, a sampling pipe is arranged on the sampling tank, and a feeding end at the lower part of the sampling pipe extends into the sludge storage pool. A discharge pipe is mounted at the bottom of the sampling tank, and a discharge valve is mounted on the discharge pipe. The sampling device has the beneficial effects that the inner wall of the sampling tank and components in the sampling tank can be flushed by arranging the water conveying pipe, the flushing disc and the spray head, so that sludge is prevented from being remained in the sampling tank, and meanwhile, the water conveying pipe is connected with the sampling pipe, so that the sampling pipe can be backwashed, and sludge is prevented from being remained in the sampling pipe; therefore, the sludge material sampled next time is not polluted, and the accuracy of the subsequent sludge detection result is ensured.

Description

Technical Field

[0001] This utility model relates to the field of sludge sampling technology, and in particular to an automatic sampling device for sludge storage ponds. Background Technology

[0002] Sludge storage tanks are an indispensable transitional link in the sludge treatment process. Their main functions include collecting sludge from different treatment units such as primary sedimentation tanks, secondary sedimentation tanks, and digestion tanks, preventing sludge accumulation or system blockage caused by the intermittent operation of subsequent treatment equipment (such as dewatering machines and digestion tanks), regulating fluctuations in sludge volume to ensure the continuous and stable operation of subsequent treatment equipment (such as centrifuges and belt filter presses), and ensuring the stable operation of the sludge treatment system through storage, mixing, and buffering, while also taking into account environmental protection and operational safety.

[0003] In order to effectively monitor the properties of sludge in sludge storage tanks, it is necessary to regularly sample and analyze the sludge in the sludge storage tanks. Some existing sludge storage tank sampling tanks mainly extract sludge from the sludge storage tanks by negative pressure. Since sludge has a certain degree of viscosity, it is easy to stick and remain on the inner wall of the sampling tank, causing contamination for the next sludge sampling and affecting the subsequent sludge sampling and analysis results. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing sludge sampling tanks, which mainly extract sludge from the sludge tank through negative pressure. Because the sludge has a certain viscosity, it is easy to stick and remain on the inner wall of the sampling tank, causing pollution to the next sludge sampling and affecting the subsequent sludge sampling and analysis results. This invention provides an automatic sampling device for sludge tanks.

[0005] The purpose of this utility model is achieved through the following technical solution: an automatic sampling device for a sludge storage tank, including a platform installed on the upper part of the sludge storage tank, a sampling tank installed on the platform, the upper part of the sampling tank being connected to an external vacuum pump unit through a negative pressure suction pipe, a sampling pipe installed on the sampling tank, the feed end of the lower part of the sampling pipe extending into the interior of the sludge storage tank, a discharge pipe installed at the bottom of the sampling tank, and a discharge valve installed on the discharge pipe;

[0006] The sampling tank has a rinsing plate installed on its inner top wall, with multiple spray nozzles. A water supply pipe is installed on the sampling tank, with its outlet connected to the sampling pipe and the rinsing plate, and its inlet connected to an external water supply device. A water valve is installed on the water supply pipe. By setting up the water supply pipe, rinsing plate, and spray nozzles, the inner wall of the sampling tank and the components inside the sampling tank can be rinsed, thereby preventing sludge residue from remaining in the sampling tank. At the same time, the connection between the water supply pipe and the sampling pipe allows for backwashing of the sampling pipe to prevent sludge residue from remaining in the sampling pipe, thus ensuring that the sludge sample taken next is not contaminated and guaranteeing the accuracy of subsequent sludge test results.

[0007] The external vacuum pump unit, discharge valve, and water valve are all connected to an external PLC control terminal. By setting up an external PLC control terminal connected to the external vacuum pump unit, discharge valve, and water valve, remote control of sampling and rinsing of the sampling tank can be achieved, improving equipment automation, increasing sampling efficiency, and effectively saving manpower.

[0008] A further technical solution involves installing a liquid level sensor inside the sampling tank, which is connected to an external PLC control terminal. By setting the liquid level sensor connected to the external PLC control terminal, the feed rate for negative pressure sampling inside the sampling tank can be controlled. When the specified liquid level is reached, the liquid level sensor sends a signal to the external PLC control terminal, thereby causing the external PLC control terminal to stop the external vacuum pump unit from operating, thus achieving accurate control of the sampling amount and avoiding insufficient sampling or overflow.

[0009] A further technical solution involves installing a motor on the sampling tank, with a rotating shaft installed on the power end of the motor. The rotating shaft extends into the sampling tank and is equipped with a scraper that contacts the inner wall of the sampling tank. The motor is connected to an external PLC control terminal. By setting the motor to drive the scraper to clean the inner wall of the sampling tank, the cleaning effect of the sludge on the inner wall of the sampling tank can be further improved, avoiding the contamination of subsequent sampling by sludge residue in the sampling tank.

[0010] A further technical solution is to install spiral blades at the bottom of the rotating shaft that correspond to the discharge pipe. By setting the spiral blades, the sludge at the discharge pipe can be discharged in a spiral-assisted manner, avoiding sludge blockage at the discharge pipe and improving the sludge discharge efficiency.

[0011] A further technical solution is that the rinsing plate is circular, corresponding to the inner top wall of the sampling tank, and multiple sets of nozzles are installed in a circumferential array on the rinsing plate. By setting multiple sets of nozzles in a circumferential array on the rinsing plate, the nozzles can be evenly distributed on the rinsing plate, thereby cleaning the sampling tank more effectively.

[0012] A further technical solution involves a sludge discharge trough on the platform corresponding to the discharge pipe, located below the discharge pipe. A chute is formed on one side of the sludge discharge trough, within which a sliding support plate is installed. A hydraulic cylinder is mounted on the platform, with its extension end connected to the support plate. The support plate is responsible for opening or closing the sludge discharge trough. The hydraulic cylinder drives the support plate to slide within the chute, thus opening or closing the sludge discharge trough. During sampling and discharge from the discharge pipe, the support plate closes the sludge discharge trough to support the sampling container. After sampling, when cleaning the sampling tank, the sludge discharge trough is opened to discharge the sludge and cleaning water into the sludge storage tank below, effectively saving manpower and improving equipment operating efficiency.

[0013] This invention has the following advantages: By setting up a water supply pipe, a rinsing plate, and a nozzle, the inner wall of the sampling tank and the components inside the sampling tank can be rinsed, thereby preventing sludge residue from remaining in the sampling tank. At the same time, the water supply pipe is connected to the sampling pipe, which can backwash the sampling pipe to prevent sludge residue from remaining in the sampling pipe, thus ensuring that the sludge material sampled next time is not contaminated and ensuring the accuracy of subsequent sludge test results. The external PLC control terminal connected to the external vacuum pump unit, discharge valve, and water valve can realize remote control of sampling and rinsing of the sampling tank, improve the automation of the equipment, increase sampling efficiency, and effectively save manpower. Attached Figure Description

[0014] Figure 1 This is a cross-sectional view of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the rinsing tray structure of this utility model;

[0016] In the diagram, 1. Platform; 2. Sampling tank; 3. Negative pressure suction pipe; 4. Sampling pipe; 5. Discharge pipe; 6. Discharge valve; 7. Washing plate; 8. Water supply pipe; 9. Liquid level sensor; 10. Motor; 11. Scraper; 12. Nozzle; 13. Water valve; 14. Spiral blade; 15. Hydraulic cylinder; 16. Support plate; 17. Slide chute. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only used for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figures 1-2 As shown, an automatic sampling device for a sludge storage tank includes a platform 1 installed on the upper part of the sludge storage tank, a sampling tank 2 installed on the platform 1, the upper part of the sampling tank 2 being connected to an external vacuum pump unit through a negative pressure suction pipe 3, a sampling pipe 4 installed on the sampling tank 2, the feed end of the lower part of the sampling pipe 4 extending into the interior of the sludge storage tank, a discharge pipe 5 installed at the bottom of the sampling tank 2, and a discharge valve 6 installed on the discharge pipe 5.

[0024] The sampling tank 2 has a rinsing plate 7 installed on its inner top wall. Multiple sets of nozzles 12 are installed on the rinsing plate 7. A water supply pipe 8 is installed on the sampling tank 2. The outlet of the water supply pipe 8 is connected to the sampling pipe 4 and the rinsing plate 7 respectively. The inlet of the water supply pipe 8 is connected to an external water supply device. A water valve 13 is installed on the water supply pipe 8. By setting up the water supply pipe 8, the rinsing plate 7 and the nozzles 12, the inner wall of the sampling tank 2 and the internal components of the sampling tank 2 can be rinsed, thereby avoiding sludge residue in the sampling tank 2. At the same time, the connection between the water supply pipe 8 and the sampling pipe 4 can backwash the sampling pipe 4 to avoid sludge residue in the sampling pipe 4, so that the sludge material sampled next time will not be contaminated, and the accuracy of the subsequent sludge test results can be guaranteed.

[0025] The external vacuum pump unit, discharge valve 6, and water valve 13 are all connected to an external PLC control terminal. By setting an external PLC control terminal connected to the external vacuum pump unit, discharge valve 6, and water valve 13, remote control of sampling and rinsing of sampling tank 2 can be achieved, improving equipment automation, increasing sampling efficiency, and effectively saving manpower.

[0026] A liquid level sensor 9 is installed inside the sampling tank 2. The liquid level sensor 9 is connected to an external PLC control terminal. By setting the liquid level sensor 9 connected to the external PLC control terminal, the feed rate of the negative pressure sampling in the sampling tank 2 can be controlled. When the specified liquid level is reached, the liquid level sensor 9 sends a signal to the external PLC control terminal, thereby causing the external PLC control terminal to control the external vacuum pump unit to stop working, thus completing the accurate control of the sampling amount and avoiding insufficient sampling or overflow.

[0027] A motor 10 is installed on the sampling tank 2. The power end of the motor 10 is equipped with a rotating shaft, which extends into the sampling tank 2 and is equipped with a scraper 11 that contacts the inner wall of the sampling tank 2. The motor 10 is connected to an external PLC control terminal. By setting the motor 10 to drive the scraper 11 to clean the inner wall of the sampling tank 2, the cleaning effect of the sludge on the inner wall of the sampling tank 2 can be further improved, and the sludge residue in the sampling tank 2 can be avoided from causing pollution to subsequent sampling.

[0028] The bottom of the rotating shaft is equipped with a spiral blade 14 corresponding to the discharge pipe 5. By setting the spiral blade 14, the sludge at the discharge pipe 5 can be discharged with spiral assistance, avoiding sludge blockage at the discharge pipe 5 and improving the sludge discharge efficiency.

[0029] The rinsing plate 7 is circular, corresponding to the inner top wall of the sampling tank 2. Multiple sets of nozzles 12 are installed in a circumferential array on the rinsing plate 7. By setting multiple sets of nozzles 12 in a circumferential array on the rinsing plate 7, the nozzles 12 can be evenly distributed on the rinsing plate 7, thereby cleaning the sampling tank 2 more effectively.

[0030] Platform 1 is equipped with a sludge discharge trough corresponding to the discharge pipe 5. The sludge discharge trough is located below the discharge pipe 5. A chute 17 is opened on one side of the sludge discharge trough, and a sliding support plate 16 is installed in the chute 17. A hydraulic cylinder 15 is installed on platform 1. The telescopic end of the hydraulic cylinder 15 is connected to the support plate 16. The support plate 16 is responsible for opening or closing the sludge discharge trough. The hydraulic cylinder 15 drives the support plate 16 to slide in the chute 17 to open or close the sludge discharge trough. During the sampling and discharge process of the discharge pipe 5, the support plate 16 can close the sludge discharge trough to support the sampling container. After sampling, when cleaning the sampling tank 2, the sludge discharge trough is opened to discharge the sludge and cleaning water into the sludge storage tank below, thereby effectively saving manpower and improving the operating efficiency of the equipment.

[0031] The working process of this utility model is as follows: When sampling sludge from the sludge storage tank, the external vacuum pump unit connected to the negative pressure suction pipe 3 first operates to generate negative pressure in the sampling tank 2, thereby causing the sampling pipe 4 to draw the sludge from the sludge storage tank into the sampling tank 2. When the liquid level sensor 9 reaches the set liquid level, the liquid level sensor 9 sends a signal to the external PLC control terminal, and the external PLC control terminal controls the external vacuum pump unit to stop. The sampling container is then placed on the support plate 16 located below the discharge pipe 5, and the discharge valve 6 is opened to discharge the sampled sludge into the discharge pipe 5. In the sampling container, the external PLC control terminal controls the motor 10 to drive the scraper 11 and the spiral blade 14 to rotate, so that the sludge in the sampling tank 2 does not stick to the sampling tank 2, and improves the discharge efficiency of the discharge pipe 5. After sampling is completed, the sampling container is removed from the support plate 16 for testing and analysis. The hydraulic cylinder 15 is controlled to retract the support plate 16 into the slide 17 and open the sewage discharge trough on the platform 1. At this time, the water valve 13 is controlled to open to backwash the sampling tank 2 and the sampling pipe 4. The clean water from the backwash can be directly discharged into the sludge storage tank.

[0032] Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. An automatic sampling device for a lagoon, comprising a platform (1) mounted on the upper part of the lagoon, characterized in that: The platform (1) is provided with a sampling tank (2), the upper part of the sampling tank (2) is connected with an external vacuum pump unit through a negative pressure air exhaust pipe (3), the sampling tank (2) is provided with a sampling pipe (4), the lower part of the sampling pipe (4) extends to the inside of the sludge storage tank, the bottom of the sampling tank (2) is provided with a discharge pipe (5), the discharge pipe (5) is provided with a discharge valve (6); The inner top wall of the sampling tank (2) is provided with a flushing disc (7), the flushing disc (7) is provided with a plurality of groups of spray heads (12), the sampling tank (2) is provided with a water delivery pipe (8), the water outlet end of the water delivery pipe (8) is connected with the sampling pipe (4) and the flushing disc (7) respectively, the water inlet end of the water delivery pipe (8) is connected with an external water supply device, and the water delivery pipe (8) is provided with a water valve (13); The external vacuum pump unit, the discharge valve (6) and the water valve (13) are connected with an external PLC control end.

2. An automatic sampling device for a lagoon as defined in claim 1, wherein: The sampling tank (2) is provided with a liquid level sensor (9), and the liquid level sensor (9) is connected with an external PLC control end.

3. An automatic sampling device for a lagoon according to claim 1 or 2, characterized in that: The sampling tank (2) is provided with a motor (10), the power end of the motor (10) is provided with a rotating shaft, the rotating shaft extends into the sampling tank (2) and is provided with a scraper (11) in contact with the inner wall of the sampling tank (2), and the motor (10) is connected with an external PLC control end.

4. An automatic sampling device for a lagoon as defined in claim 3, wherein: The bottom of the rotating shaft is provided with a spiral blade (14) corresponding to the discharge pipe (5).

5. An automatic sampling device for lagoons according to claim 1, characterized in that: The flushing disc (7) is circular corresponding to the inner top wall of the sampling tank (2), and a plurality of groups of the spray heads (12) are arranged in a circular array on the flushing disc (7).

6. An automatic sampling device for lagoons according to claim 1, characterized in that: The platform (1) is provided with a blowdown tank corresponding to the discharge pipe (5), the blowdown tank is arranged below the discharge pipe (5), a sliding groove (17) is formed in one side of the blowdown tank, a load-bearing plate (16) is arranged in the sliding groove (17) and can slide, a hydraulic cylinder (15) is arranged on the platform (1), the telescopic end of the hydraulic cylinder (15) is connected with the load-bearing plate (16), and the load-bearing plate (16) is responsible for opening or closing the blowdown tank.

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