Polluted water source sampling device

Abstract

The utility model relates to the technical field of sewage sampling, in particular to a polluted water source sampling device which comprises a device shell, a sewage collecting cavity, a sampling spoon, an instantaneous sampling cavity and a mixed sampling cavity, the mixed sampling cavity is connected with the sewage collecting cavity through a water pipeline; the sampling spoon is arranged in the sewage collecting cavity, a flow guide pipe is arranged at a spoon handle of the sampling spoon, a spoon head and the flow guide pipe are integrally formed, and the sampling spoon is controlled by a motor to rotate to take sewage; a water receiving opening is designed in the wall surface of the instantaneous sampling cavity, a water receiving groove connected with the water receiving opening is designed in the wall surface of the sewage collecting cavity, a small automatic conveying device is arranged in the instantaneous sampling cavity and comprises an annular guide rail, and a plurality of sliding blocks for fixing sampling pipes and a waste water collecting box are arranged on the annular guide rail; and the sliding block is controlled by a sliding seat transmission system. According to the utility model, the technical problem that instantaneous sewage samples at various specific time points cannot be obtained in the time period of mixed sampling is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage sampling, in particular to a polluted water source sampling device. Background Art

[0002] The existing sewage sampling device can only adapt to fixed sampling requirements and cannot automatically collect mixed samples and instantaneous samples. Therefore, it is extremely important to solve the problem of automatically collecting instantaneous and mixed samples of sewage.

[0003] The currently published patent is named "A Water Quality Sampling Device" and is a Chinese utility model patent with publication number CN215985345U. This patent is equipped with an automatic sampling mechanism, a flow monitoring mechanism, an automatic water quality analysis mechanism, and a data control mechanism. It can automatically collect instantaneous water samples and mixed water samples, and has an automatic rinsing function. However, this utility model patent cannot perform instantaneous sampling and mixed sampling at the same time, that is, within the time period of mixed sampling, it cannot obtain instantaneous samples of sewage at each specific time point. Utility Model Content

[0004] The purpose of the present application is to provide a polluted water source sampling device, which solves the technical problem of not being able to obtain instantaneous sewage samples at each specific time point within the time period of mixed sampling.

[0005] In order to solve the above technical problems, the solution adopted by this application is as follows:

[0006] The utility model provides a polluted water source sampling device, comprising a device shell, which is provided with a water inlet, a water outlet, and a cleaning port; a sewage collecting chamber and a water pipe are provided inside the device; the sewage collecting chamber is respectively connected to the water inlet, the water outlet, and the cleaning port by water pipes; the water pipes are all provided with electromagnetic valves, which are controlled by relays; a microprocessor is provided inside the device, which is connected to the relay that controls the electromagnetic valve; the device is characterized in that it also includes a mixed sampling chamber, a collection device, and an instantaneous sampling chamber; the mixed sampling chamber is connected to the sewage collecting chamber by a water pipe provided with a solenoid valve; the collection device is provided inside the sewage collecting chamber, and the collection device collects sewage samples inside the sewage collecting chamber and collects the sewage samples into the instantaneous sampling chamber.

[0007] In some embodiments, the collection device includes a sampling spoon, which is arranged inside the sewage collection chamber, with one end of the sampling spoon being a spoon head and the other end being a spoon handle; a diversion tube is provided at the handle of the sampling spoon, which is connected to the spoon head, and the middle part of the sampling spoon is rotatably connected to the upper part of the sewage collection chamber via a rotating shaft, forming a lever structure; the rotating shaft of the sampling spoon is controlled to rotate by a motor, and the circuit where the motor is located is a sampling spoon motor drive circuit; the collection device also includes a water inlet and a water trough, the wall surface of the instantaneous sampling chamber is designed with a water inlet, and the wall surface of the sewage collection chamber is designed with a water trough connected to the water inlet;

[0008] When the sampling spoon collects sewage samples inside the sewage collection chamber, the spoon head is lower than the spoon handle and the spoon head is located in the sewage; when the sewage sample is collected into the instantaneous sampling chamber, the spoon handle is lower than the spoon head and the spoon handle is located above the water receiving trough.

[0009] In some embodiments, the sampling spoon motor drive circuit includes a judgment circuit, a control circuit, an AND gate, and a working circuit. The judgment circuit is connected to the small automatic transmission device, and the small automatic transmission device sends a signal to the judgment circuit. After the judgment circuit completes the processing, it sends a signal to one input end of the AND gate and a microprocessor connected thereto respectively; the control circuit is connected to the microprocessor, and the microprocessor sends a signal to the judgment circuit. After the judgment circuit completes the processing, it sends a signal to the other input end of the AND gate connected thereto; after the AND gate receives the control signals from the judgment circuit and the control circuit at the same time, the output end of the AND gate outputs a signal to the working circuit connected thereto, and after the working circuit receives the signal, it drives the motor to rotate.

[0010] In some embodiments, a small automatic transport device is provided in the instantaneous sampling chamber, and the small automatic transport device includes an annular guide rail, on which are provided a plurality of sliders for placing sampling tubes and wastewater collection boxes.

[0011] In some embodiments, the slider is provided with a placement slot for placing a sampling tube and a wastewater collection box.

[0012] In some embodiments, the small automatic transport device further includes a slide transmission system, and the slider is controlled by the slide transmission system to move along the annular guide rail.

[0013] In some embodiments, the slider is provided with a pressure sensor and an infrared emitting tube.

[0014] In some embodiments, a water level sensor is further included. The water level sensor is disposed at the top of the sewage collection chamber and connected to the microprocessor. The water level sensor is an ultrasonic module.

[0015] In some embodiments, the solenoid valve includes solenoid valve 1, solenoid valve 2, solenoid valve 3, solenoid valve 4, and solenoid valve 5; the solenoid valve 1 is arranged on the water pipe near the water inlet; the solenoid valve 2 is arranged on the water pipe near the cleaning port; the solenoid valve 3 is arranged on the water pipe near the sewage collection chamber; the solenoid valve 4 is arranged on the water pipe near the drain outlet; the solenoid valve 5 is arranged on the water pipe near the mixed sampling chamber.

[0016] The technical solution of this application has at least the following advantages and beneficial effects:

[0017] The utility model is provided with an instantaneous sampling chamber, a mixed sampling chamber, and a sewage collection chamber. The sewage is first collected in the sewage collection chamber and then instantaneous collection and mixed collection are performed separately, so as to prevent the flowing water from interfering with the sample collection work, ensure that the sewage is collected in a static state, improve the accuracy of sampling, and solve the problem of not being able to obtain instantaneous sewage samples at each specific time point within the time period of mixed sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the internal structure of the utility model.

[0019] Figure 2 This is a top view of the instantaneous sampling cavity of the present utility model.

[0020] Figure 3 This is a circuit connection diagram of the pressure sensor and infrared emitting tube of the utility model.

[0021] Figure 4 This is the sampling spoon motor drive circuit diagram of the utility model.

[0022] In the figure: 1-water receiving trough, 2-mixing sampling chamber, 3-instantaneous sampling chamber, 4-water level sensor, 5-sampling spoon, 6-sewage collecting chamber, 7-manual valve, 8-water inlet, 9-annular guide rail, 10-water outlet, 11-sampling tube, 12-wastewater collection box, 13-water receiving port, 14-cleaning port, 151-solenoid valve 1, 152-solenoid valve 2, 153-solenoid valve 3, 154-solenoid valve 4, 155-solenoid valve 5. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following figures. Therefore, once an item is defined in one figure, it does not require further definition or explanation in subsequent figures. Terms such as "center," "upper," "lower," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the figures, or the positions or locations in which the product is typically placed when in use. These terms are used solely for ease of description and simplification of the present application. They do not indicate or imply that the device or component referred to must have a specific position, be constructed, or operate in a specific orientation, and are not to be construed as limiting the present application. It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "mounted," and "connected" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct connections or indirect connections through an intermediary; or internal connections between two components. Those skilled in the art will understand the specific meanings of these terms in this application in specific contexts.

[0025] Example 1

[0026] Please refer to Figures 1-4 The utility model provides a contaminated water source sampling device, which is the same as the prior art and includes a device shell, which is provided with a water inlet 8, a water outlet 10, and a cleaning port 14. The device is internally provided with a sewage collecting chamber 6, a water pipe, a mixed sampling chamber 2, and an instantaneous sampling chamber 3. The sewage collecting chamber 6 is respectively connected to the water inlet 8, the water outlet 10, and the cleaning port 14 by a water pipe. The water pipes are all provided with solenoid valves, which are controlled by relays; a microprocessor is provided inside the device, and the microprocessor is connected to the relay that controls the solenoid valve; the water inlet 8 and the water outlet 10 are connected to the sewage source, and a filter is provided at the water inlet 8 for filtering impurities; the cleaning port 14 is connected to an external water source for cleaning the internal cavity of the device. The device needs to be cleaned after each sampling to ensure that the new sample will not be contaminated when the sample is collected next time.

[0027] The wall of the instantaneous sampling chamber 3 is designed with a water inlet 13, and the wall of the sewage collection chamber 6 is designed with a water receiving trough 1 connected to the water inlet 13. The side of the instantaneous sampling chamber 3 is provided with an opening for taking the sampling tube 11 and the wastewater collection box 12, and the opening is hinged with a door panel; the mixed sampling chamber 2 is connected to the sewage collection chamber 6 by a water pipe, and the water pipe connecting the mixed sampling chamber 2 and the sewage collection chamber 6 is provided with a solenoid valve;

[0028] The solenoid valves include solenoid valve one 151, solenoid valve two 152, solenoid valve three 153, solenoid valve four 154, and solenoid valve five; solenoid valve one 151 is arranged on the water pipe near the water inlet; solenoid valve two 152 is arranged on the water pipe near the cleaning port; solenoid valve three 153 is arranged on the water pipe near the sewage collection chamber; solenoid valve four 154 is arranged on the water pipe near the drain outlet; solenoid valve five is arranged on the water pipe near the mixed sampling chamber.

[0029] A microprocessor is provided inside the device, and the microprocessor is connected to a relay that controls the solenoid valve;

[0030] The utility model also includes a micro water pump and a water level sensor 4; the micro water pump is controlled by a microprocessor and is arranged at a water inlet 8 connected to a sewage collection chamber 6 for extracting sewage; the water level sensor 4 is arranged at the top of the sewage collection chamber 6, and the water level sensor 4 is connected to the microprocessor for detecting the water level of the sewage collection chamber 6.

[0031] Preferably, the water level sensor 4 is an ultrasonic module, which can detect the water level in a non-contact manner and avoid wear or contamination of the water level sensor 4 due to contact; the model of the ultrasonic module is HC-SR04.

[0032] Unlike the prior art, the present invention also includes a small automatic transmission device and a sampling spoon 5. The small automatic transmission device is provided with a sampling tube 11 and a wastewater collection box 12. The small automatic transmission device moves the sampling tube 11 or the wastewater collection box 12 to the water inlet 13 to switch the positions of the two. The sampling spoon 5 is arranged inside the sewage collection chamber 6. The spoon handle of the sampling spoon 5 is provided with a guide tube. The spoon head and the guide tube are integrally formed. The middle part of the sampling spoon 5 is connected to the upper part of the sewage collection chamber via a rotating shaft to form a lever structure. The rotating shaft of the sampling spoon is controlled by a motor to rotate. After the sampling spoon head rotates to below the water level of the sewage collection chamber to collect sewage, the motor rotates to control the spoon head to be higher than the spoon handle, and the sewage flows out along the guide tube into the water receiving tank 1. The circuit where this motor is located is the sampling spoon motor drive circuit.

[0033] A small automatic transport device is provided in the instantaneous sampling chamber 3. The small automatic transport device includes an annular guide rail 9, on which are provided a plurality of sliders for placing sampling tubes 11 and wastewater collection boxes 12. Specifically, the sliders are provided with placement slots for placing the sampling tubes 11 and wastewater collection boxes 12.

[0034] The slider is controlled by the slide transmission system to move along the annular guide rail; the slider is provided with a pressure sensor and an infrared emitting tube, the infrared emitting tube is connected to the pressure sensor, and after the pressure sensor detects the pressure signal, the infrared emitting tube is controlled to stop emitting infrared light; the pressure sensor is connected to the judgment circuit in the sampling spoon motor drive circuit, and after the pressure sensor detects the pressure signal, it sends the signal to the judgment circuit for judgment.

[0035] Specifically, the pressure sensor is disposed in the placement tank to detect weight changes of the sampling tube 11 and the wastewater collection box 12 , thereby determining whether sewage exists in the sampling tube 11 and the wastewater collection box 12 .

[0036] The slide drive system incorporates an infrared receiver tube, located below the water inlet 13, in addition to existing technology. Upon receiving infrared light, the infrared receiver tube deactivates the slide drive system and stops the slider. This embodiment utilizes infrared technology to control the operation of the slide drive system, thereby controlling the relative positions of the sampling tube 11 and wastewater collection tank 12 within the instantaneous sampling chamber 3. These tubes are positioned directly below the water inlet 13, which is connected to the water tank 1.

[0037] The infrared emitting tube in the slider emits infrared light. When the infrared receiving tube receives the infrared light, the slider stops moving. At this time, the mouth of the sampling tube 11 is located directly below the water inlet 13. The sewage sample collected by the sampling spoon 5 passes through the water receiving trough 1 and the water inlet 13 in turn and flows into the collection tube 11; if the device is in the cleaning stage, the wastewater collection box 12 is moved and stays directly below the water inlet 13, and the cleaned wastewater flows into the wastewater collection box 12.

[0038] Preferably, in order to facilitate the distinction between the sampling tube 11 and the wastewater collection box 12 and prevent sewage samples from pouring into the wastewater collection box 12, two infrared receiving tubes are arranged on the lower side of the water inlet 13, two infrared emitting tubes are arranged in the wastewater collection box 12, and one infrared emitting tube is arranged in the sampling tube 11. When the two infrared receiving tubes receive infrared light at the same time, it indicates that the wastewater collection box 12 is parked directly below the water inlet 13.

[0039] Furthermore, if Figure 3As shown, the pressure sensor and infrared emitting tube circuit includes a comparator U3, a transistor Q4, a varistor U5, a sliding rheostat PR1, an infrared diode D2, a capacitor C1, and resistors R8, R9, R10, and R11. In this circuit, the resistor R11, one end of the sliding rheostat PR1, and pin 4 of the comparator U3 are connected and connected to the power supply. The other end of the resistor R11, one end of the resistor R10, and one end of the varistor U5 are connected. The other end of the resistor R10, pin 3 of the comparator U3, and one end of the capacitor C1 are connected. The middle pin of the sliding rheostat PR1 is connected to the comparator U3. The pin 2 of the comparator U3 is connected, the other end of the varistor U5, the other end of the sliding rheostat PR1, the other end of the capacitor C1, and the pin 5 of the comparator U3 are connected and grounded; the pin 1 of the comparator U3 is connected to one end of the resistor R9, and the connected part here is provided with an output end, which is referred to as the OUT1 output end for the convenience of description; the other end of the resistor R9 is connected to the base of the transistor Q4, the collector of the transistor Q4 is connected to the power supply, the emitter of the transistor Q4 is connected to one end of the resistor R8, the other end of the resistor R8 is connected to the positive electrode of the infrared diode D2, and the negative electrode of the infrared diode is grounded.

[0040] The sampling spoon motor drive circuit includes a judgment circuit, a control circuit, an AND gate, and a working circuit. The judgment circuit is connected to the pressure sensor circuit in the slider. When the pressure sensor detects a pressure signal, it sends a signal to the judgment circuit. The judgment circuit receives the signal and processes and judges it. After the judgment circuit completes the processing, it sends the signal to one input end of the AND gate connected to it and to the microprocessor. The control circuit is connected to the microprocessor. The microprocessor sends a signal to the judgment circuit. After the judgment circuit completes the processing, it sends a signal to the other input end of the AND gate connected to it. If the AND gate receives control signals from both the judgment circuit and the control circuit, the output end of the AND gate outputs a signal to the working circuit connected to it. After receiving the signal, the working circuit controls the motor in the circuit to operate, thereby driving the sampling spoon 5 to rotate.

[0041] It should be noted that the purpose of setting up the judgment circuit is to monitor whether all the sampling tubes 11 are in use. If all the sampling tubes 11 are in use, the judgment circuit will send a control signal to the microprocessor and stop sending a signal to the AND gate. After receiving this signal, the microprocessor will send a reminder message to the staff, reminding the staff to take the instantaneous sample in time. At this time, the sampling spoon motor drive circuit is cut off and the sampling spoon 5 in the device will not be driven.

[0042] Furthermore, if Figure 4As shown, the sampling spoon motor drive circuit includes an AND gate U1, an OR gate U2, NOT gates U6 and U7, a relay U3, an indicator LED1, a diode D1, transistors Q1, Q2, and Q3, an interface H1, and resistors R1, R2, R3, R4, R5, R6, and R7. The function of the diode D1 is to protect the motor and prevent damage to the motor caused by reverse current.

[0043] Furthermore, the judgment circuit includes an OR gate U2, NOT gates U6 and U7, an indicator light LED1, a transistor Q2, resistors R3, R4, R5, and R6; the control circuit includes a transistor Q3, resistors R7 and R8; and the working circuit includes a relay U3, an interface H1, a diode D1, a transistor Q1, and resistors R1 and R2.

[0044] Furthermore, in the sampling spoon motor drive circuit, one end of the resistor R7 is connected to the pin PA4 of the microprocessor, the other end of the resistor R7 is connected to the base of the transistor Q3, the collector of the transistor is connected to one end of the resistor R8, the other end of the resistor R8, one end of the resistor R4, the positive electrode of the indicator LED1, one end of the resistor R2, the negative electrode of the diode D1, and the pin 1 of the interface H1 are connected and connected to the power supply; the emitter of the transistor Q3 is connected to the pin 2 of the AND gate; the input end of the OR gate U2 is respectively connected to the OUT end of the different pressure sensor circuits. For the convenience of description, in this embodiment, the pin 1 of the OR gate U2 is called the OUT1 input end and the pin 2 is called the OUT2 input end; the pin 3 of the OR gate U2 is connected to the input end of the NOT gate U6, the output end of the NOT gate U6 is connected to one end of the resistor R6, and the other end of the resistor R6 is connected to the base of the transistor Q2. The electrodes are connected, the collector of the transistor Q2, the other end of the resistor R4, and the negative electrode of the indicator LED1 are connected; the emitter of the transistor Q2, the input end of the NOT gate U7, and one end of the resistor R5 are connected, and the output end of the NOT gate U7 is connected to pin 1 of the AND gate U1; the other end of the resistor R5 is connected to one end of the resistor R3, and an output end is set here, which is connected to pin PA5 of the microprocessor; pin 3 of the AND gate U1 is connected to pin 4 of the relay U3, pin 1 of the relay U3 is grounded, pin 5 is connected to the power supply, and pin 3 is suspended, pin 2 of the relay U3 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is connected to the other end of the resistor R3 and grounded; the collector of the transistor Q1, the other end of the resistor R2, the positive electrode of the diode D1, and the pin 2 of the interface H1 are connected.

[0045] For ease of understanding, the working process of the polluted water source collection device in this embodiment is as follows:

[0046] The instantaneous sampling described in this embodiment refers to the collection of sewage at a certain moment; mixed sampling refers to the mixing of sewage collected at multiple moments.

[0047] When the polluted water sampling device is started, the electromagnetic valve 151 and the electromagnetic valve 3 153 are opened, and the micro pump extracts sewage into the sewage collection chamber 6; the water level sensor 4 in the sewage collection chamber 6 monitors the water level of the sewage in the sewage collection chamber 6. When the water level reaches the specified level, the electromagnetic valve 151 and the electromagnetic valve 3 153 are closed, and the micro pump stops working;

[0048] After the micro-pump stops working, the sampling spoon 5 starts working. The sampling spoon 5 is controlled by the forward rotation of the motor. The spoon head of the sampling spoon 5 rotates to below the water level of the sewage collection chamber 6 to take sewage. Then the motor reverses to control the spoon head of the sampling spoon 5 to be higher than the spoon handle. The sewage flows out along the guide pipe to the water receiving trough, and then flows into the sampling tube 11 in the instantaneous sampling chamber 3 through the water receiving port 13, completing the instantaneous sampling of the sewage.

[0049] After the sampling tube 11 collects sewage, the slide transmission system controls the corresponding slide to move along the annular guide rail 9 until the empty collection tube moves to the water inlet 13; if all the sampling tubes 11 are used, the microprocessor sends a message to the staff to remind them to take the used sampling tubes 11 in time;

[0050] After the instantaneous sampling is completed, the electromagnetic valve 5 155 is opened, and the sewage flows from the sewage collection chamber 6 into the mixed sampling chamber 2, completing the collection of the mixed sample. When the process is performed multiple times, the samples at multiple times are mixed in the mixed sampling chamber;

[0051] The staff places the sampling tube at the water outlet where the manual valve 7 is located, opens the manual valve 7, and the mixed sewage inside the mixed sampling chamber 2 flows out, completing the mixed sewage sampling;

[0052] After the collection of the mixed sample is completed, the electromagnetic valve 5 155 is closed, the electromagnetic valve 4 154 is opened, and the remaining sewage in the sewage collection chamber 6 is discharged. After the sewage is discharged, the electromagnetic valve 4 154 is closed;

[0053] After the sewage is discharged, the electromagnetic valve 2 152 and the electromagnetic valve 3 153 are opened, and water flows from the cleaning port 14 into the sewage collecting chamber 6 for cleaning.

[0054] The cleaning process is similar to the wastewater sampling process, except that the sampling spoon 5 collects the cleaning liquid, which then flows through the water receiving trough into the wastewater collection tank 12 in the transient collection chamber. Solenoid valve 5 155 is not opened. The cleaning liquid cleans the sampling spoon and the water receiving trough, reducing data interference.

[0055] The above is a single working process of the contaminated water source collection device in this embodiment. In a complete working cycle, the contaminated water source collection device will cycle through the working process to obtain instantaneous samples in various time periods and mixed sewage samples.

[0056] Thus far, various embodiments of the present invention have been described in detail. To avoid obscuring the concept of the present invention, some details known in the art have been omitted. Based on the above description, those skilled in the art will fully understand how to implement the technical solutions of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A contaminated water sampling device, comprising a device housing, the device housing being provided with a water inlet (8), a water outlet (10), and a cleaning port (14); a sewage collecting chamber (6) and a water pipe being provided inside the device; the sewage collecting chamber (6) being connected to the water inlet (8), the water outlet (10), and the cleaning port (14) by water pipes, each of the water pipes being provided with a solenoid valve, the solenoid valve being controlled by a relay; a microprocessor being provided inside the device, the microprocessor being connected to a relay for controlling the solenoid valve; and characterized in that: The invention also comprises a mixed sampling chamber (2), a collection device, and an instantaneous sampling chamber (3); the mixed sampling chamber (2) is connected to the sewage collection chamber (6) by a water pipe provided with a solenoid valve; the collection device is arranged inside the sewage collection chamber (6), and the collection device collects sewage samples inside the sewage collection chamber (6) and collects the sewage samples into the instantaneous sampling chamber (3).

2. A polluted water source sampling device according to claim 1, characterized in that: The collection device comprises a sampling spoon (5), the sampling spoon (5) is arranged inside the sewage collection chamber (6), one end of the sampling spoon is a spoon head, and the other end is a spoon handle; a flow guide tube is provided at the spoon handle of the sampling spoon (5) and is connected to the spoon head, and the middle part of the sampling spoon (5) is rotatably connected to the upper part of the sewage collection chamber (6) through a rotating shaft to form a lever structure; the rotating shaft of the sampling spoon (5) is controlled to rotate by a motor, and the circuit where the motor is located is the sampling spoon (5) motor drive circuit; the collection device also comprises a water inlet (13) and a water receiving trough (1); the wall surface of the instantaneous sampling chamber (3) is designed with a water inlet (13), and the wall surface of the sewage collection chamber (6) is designed with a water receiving trough (1) connected to the water inlet (13); When the sampling spoon collects sewage samples inside the sewage collection chamber (6), the height of the spoon head is lower than the spoon handle, and the spoon head is located in the sewage; when the sewage sample is collected in the instantaneous sampling chamber (3), the height of the spoon handle is lower than the spoon head, and the spoon handle is located above the water receiving trough.

3. A polluted water source sampling device according to claim 1, characterized in that: A small automatic transmission device is provided in the instantaneous sampling chamber (3), and the small automatic transmission device comprises an annular guide rail (9), on which a plurality of slide blocks for placing sampling tubes (11) and wastewater collection boxes (12) are provided.

4. A polluted water source sampling device according to claim 2, characterized in that: The sampling spoon (5) motor drive circuit includes a judgment circuit, a control circuit, an AND gate, and a working circuit. The judgment circuit is connected to a small automatic transmission device, and the small automatic transmission device sends a signal to the judgment circuit. After the judgment circuit completes processing, the signal is sent to an input end of the AND gate and a microprocessor connected thereto respectively. The control circuit is connected to the microprocessor. The microprocessor sends a signal to the judgment circuit. After the judgment circuit completes processing, the signal is sent to another input end of the AND gate connected thereto. After the AND gate receives the control signals from the judgment circuit and the control circuit at the same time, the output end of the AND gate outputs a signal to the working circuit connected thereto. After the working circuit receives the signal, the motor is driven to rotate.

5. A polluted water source sampling device according to claim 4, characterized in that: The slide block is provided with a placement groove for placing a sampling tube (11) and a wastewater collection box (12).

6. A polluted water source sampling device according to claim 4, characterized in that: The small automatic transmission device also includes a slide transmission system, and the slider is controlled by the slide transmission system to move along the annular guide rail (9).

7. A polluted water source sampling device according to any one of claims 4 to 6, characterized in that: The slider is provided with a pressure sensor and an infrared emitting tube.

8. The polluted water source sampling device according to claim 1, characterized in that: It also includes a water level sensor (4), which is arranged on the top of the sewage collection chamber (6) and connected to the microprocessor; the water level sensor (4) is an ultrasonic module.

9. The polluted water source sampling device according to claim 1, characterized in that: The solenoid valves include solenoid valve 1 (151), solenoid valve 2 (152), solenoid valve 3 (153), solenoid valve 4 (154), and solenoid valve 5; the solenoid valve 1 (151) is arranged on a water conduit close to the water inlet (8); the solenoid valve 2 (152) is arranged on a water conduit close to the cleaning port (14); the solenoid valve 3 (153) is arranged on a water conduit close to the sewage collection chamber (6); the solenoid valve 4 (154) is arranged on a water conduit close to the drain port; and the solenoid valve 5 is arranged on a water conduit close to the mixed sampling chamber (2).

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