Automatic sampler for collecting water sample at regular time

Abstract

The automatic sampler comprises a supporting seat, and further comprises a sealing box, a sampling shell, a lifting mechanism, a water inlet mechanism and an emptying mechanism, the sealing box is fixedly arranged on the supporting seat, the sampling shell is arranged on one side of the supporting seat, a sampling opening is formed in the inner bottom wall of the sampling shell, a first control valve is arranged in the sampling opening, and a second control valve is arranged in the lifting mechanism. The lifting mechanism is arranged between the supporting seat and the sampling shell and used for adjusting the sampling depth of the sampling shell, the water inlet mechanism is arranged in the sealing box and can feed water into the sealing box through the sampling shell, and the emptying mechanism is arranged in the sealing box and used for emptying water in the sampling shell. The automatic sampler for regularly collecting the water sample solves the problem that the subsequent sampling accuracy can be influenced by water remained in a sampling tube in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of sampler technology, specifically to an automatic sampler for collecting water samples at regular intervals. Background Technology

[0002] Automatic water samplers play a crucial role in many fields such as environmental monitoring and water quality analysis. They can automatically collect water samples at preset time intervals, greatly improving sampling efficiency and accuracy while reducing errors and labor intensity associated with manual sampling.

[0003] However, current automatic samplers on the market have a significant problem in practical applications. After the sampling process is completed, water from the previous sample often remains inside the sampling tube. This is because the residual water cannot be completely emptied after the sampling tube stops working. When sampling is performed again, the residual water mixes with the newly collected water sample, thus affecting the accuracy of the next sampling.

[0004] For example, in scenarios involving long-term water quality monitoring to analyze trends in pollutant concentrations, if the sampling tube contains residual water samples from previous high-concentration pollutants, newly collected water samples will be contaminated, leading to biased test results that fail to accurately reflect the current state of the water body. In some scientific experiments with extremely stringent water quality requirements, interference from residual water samples may even render the entire experimental result meaningless, preventing the drawing of accurate scientific conclusions. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides an automatic water sampler for timed water sampling, thereby solving the problem mentioned in the background art that water remaining in the sampling tube can affect the accuracy of subsequent sampling.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: an automatic water sampler for timed water sampling, comprising a support base, a sealed box, a sampling housing, a lifting mechanism, a water inlet mechanism, and a draining mechanism. The sealed box is fixedly mounted on the support base, and the sampling housing is disposed on one side of the support base. A sampling port is provided on the inner bottom wall of the sampling housing, and a first control valve is built into the sampling port. The lifting mechanism is disposed between the support base and the sampling housing for adjusting the sampling depth of the sampling housing. The water inlet mechanism is disposed inside the sealed box and can allow water to enter the sealed box through the sampling housing. The draining mechanism is disposed inside the sealed box for draining the water inside the sampling housing.

[0009] Preferably, the lifting mechanism includes:

[0010] A support frame is fixedly mounted on a support base, and the support base has a lifting port.

[0011] A traction wheel is rotatably mounted inside the support frame, and a traction rope is wound around the traction wheel. The end of the traction rope away from the traction wheel is fixedly connected to the sampling housing.

[0012] A first motor is mounted on the support frame, and its output end is fixedly connected to the traction wheel.

[0013] Furthermore, the water inlet mechanism includes:

[0014] A first spiral tube is connected to the side wall of the sampling housing, and the end of the first spiral tube away from the sampling housing extends into the sealed box;

[0015] A three-way valve is fixedly installed inside the sealed box, and one port of the three-way valve is fixedly connected to the first spiral tube;

[0016] A receiving plate is rotatably mounted on the inner bottom wall of the sealed box. The receiving plate has multiple receiving grooves, and receiving cups are placed in the receiving grooves.

[0017] A negative pressure pump is mounted on the support base, and the input end of the negative pressure pump is connected to the sealed box.

[0018] Furthermore, it also includes a microcontroller and a second motor. The microcontroller is mounted on the support base, and the second motor is mounted on the support base. The output end of the second motor is fixedly connected to the receiving plate. The microcontroller is electrically connected to both the second motor and the negative pressure pump.

[0019] Furthermore, the venting mechanism includes:

[0020] A fan is mounted on the support base, with its input end connected to the external environment and its output end connected to the three-way valve.

[0021] The second spiral tube passes through and is fixedly mounted on the support base, and is connected to the sampling housing.

[0022] Based on the above scheme, a filter screen is installed at the input end of the fan.

[0023] (III) Beneficial Effects

[0024] Compared with the prior art, this utility model provides an automatic water sampler for timed water sampling, which has the following advantages:

[0025] 1. In this utility model, the microcontroller has a built-in timer module that can be programmed to set the sampling time interval. The software program of the automatic sampler will set the sampling time interval, such as sampling once per hour or sampling at a specific time each day. When the timer reaches the set time value, it will trigger the corresponding interrupt program, thereby controlling the various components of the sampler to start working and realizing the function of collecting water samples at regular intervals.

[0026] 2. In this utility model, by setting up a negative pressure pump and a second spiral tube, the operator closes the port of the three-way valve connected to the ventilation fan. Then, the operation of the negative pressure pump can generate negative pressure in the sealed box, so that the water sample can be sucked into the receiving cup through the sampling port and the first spiral tube for storage, thereby completing the water sample collection. After a single sampling is completed, the operation of the second motor can drive the receiving plate to rotate, so that the new receiving cup can be moved to the bottom of the three-way valve to receive the water sample, thus facilitating multiple water sample collection processes.

[0027] 3. In this utility model, by setting up an evacuation mechanism, after closing the port connecting the first control valve and the three-way valve to the sealed box, the water in the first spiral tube and the sampling housing can be purged with compressed air by the operation of the fan, thereby facilitating the evacuation of residual water through the second spiral tube, thus avoiding the problem that water remaining in the sampling tube will affect the accuracy of subsequent sampling. Attached Figure Description

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

[0029] Figure 2 This is a schematic diagram of the structure from another perspective of this application;

[0030] Figure 3 This is a schematic diagram of the cross-sectional structure of this application;

[0031] Figure 4 This is a cross-sectional view of the sample housing in this application.

[0032] In the diagram: 1. Support base; 2. Sealing box; 3. Sampling shell; 4. Sampling port; 5. Support frame; 6. Traction wheel; 7. Traction rope; 8. First motor; 9. First spiral tube; 10. Three-way valve; 11. Receiving plate; 12. Receiving cup; 13. Negative pressure pump; 14. Second motor; 15. Fan; 16. Second spiral tube. Detailed Implementation

[0033] 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.

[0034] Please see Figures 1-4 An automatic water sampler for timed water sampling includes a support base 1 fixed to one side of a water body, a sealed box 2, a sampling housing 3, a lifting mechanism, a water inlet mechanism, and a draining mechanism. The sealed box 2 is fixedly mounted on the support base 1, and the sampling housing 3 is mounted on one side of the support base 1. A sampling port 4 is provided on the inner bottom wall of the sampling housing 3, and a first control valve is built into the sampling port 4. The lifting mechanism is located between the support base 1 and the sampling housing 3 and is used to adjust the sampling depth of the sampling housing 3. The water inlet mechanism is located inside the sealed box 2 and can allow water to enter the sealed box 2 through the sampling housing 3. The draining mechanism is located inside the sealed box 2 and is used to drain the water in the sampling housing 3.

[0035] Reference Figures 1-3 The lifting mechanism includes a support frame 5, a traction wheel 6, and a first motor 8. The support frame 5 is fixedly mounted on a support base 1, and the support base 1 has a lifting port. The traction wheel 6 is rotatably mounted inside the support frame 5, and a traction rope 7 is wound around the traction wheel 6. The end of the traction rope 7 away from the traction wheel 6 is fixedly connected to the sampling housing 3. The first motor 8 is mounted on the support frame 5, and the output end of the first motor 8 is fixedly connected to the traction wheel 6. Specifically, the first motor 8 is a servo motor. The operation of the first motor 8 can drive the traction wheel 6 to rotate, thereby adjusting the height of the sampling housing 3 through the traction rope 7, which facilitates the sampling of water samples at different depths.

[0036] Reference Figures 1-4The water inlet mechanism includes a first spiral tube 9, a three-way valve 10, a receiving plate 11, and a negative pressure pump 13. The first spiral tube 9 is connected to the side wall of the sampling housing 3, and one end of the first spiral tube 9 away from the sampling housing 3 extends into the sealed box 2. The three-way valve 10 is fixedly installed inside the sealed box 2, and one port of the three-way valve 10 is fixedly connected to the first spiral tube 9. The receiving plate 11 is rotatably installed on the inner bottom wall of the sealed box 2. The receiving plate 11 has multiple receiving grooves, and receiving cups 12 are placed in the receiving grooves. The negative pressure pump 13 is installed on the support base 1. The input of the negative pressure pump 13 is... The end is connected to the sealed box 2, and also includes a microcontroller and a second motor 14. The microcontroller is mounted on the support base 1, and the second motor 14 is mounted on the support base 1. The output end of the second motor 14 is fixedly connected to the receiving plate 11. The microcontroller is electrically connected to the second motor 14 and the negative pressure pump 13. Specifically, the microcontroller model is AT89C51. The microcontroller has a timer module inside, and the timing time can be set by programming. The sampling time interval will be set in the software program of the automatic sampler, such as sampling once per hour or sampling at a specific time every day. When the timer reaches the set time value, the corresponding interrupt program will be triggered, thereby controlling the negative pressure pump 13 to work. At this time, the port connecting the three-way valve 10 and the fan 15 can be closed. The operation of the negative pressure pump 13 can generate negative pressure in the sealed box 2, so that the water sample can be sucked into the receiving cup 12 for storage through the sampling port 4 and the first spiral tube 9, thereby completing the water sample collection. After a single sampling is completed, the second motor 14 can drive the receiving plate 11 to rotate, so that the new receiving cup 12 can move to the bottom of the three-way valve 10 to receive the water sample, thus facilitating multiple water sample collection processes.

[0037] Among them, the control valves on each port of the three-way valve are electronically controlled valves.

[0038] Reference Figure 2 and Figure 3 The venting mechanism includes a blower 15 and a second spiral tube 16. The blower 15 is mounted on the support base 1, with its input end connected to the external environment and its output end connected to a three-way valve 10. The second spiral tube 16 passes through and is fixedly mounted on the support base 1, and is connected to the sampling housing 3. A second control valve is installed on the second spiral tube 16. A filter screen is installed at the input end of the blower 15. Specifically, after closing the first control valve and the port of the three-way valve 10 connected to the sealed box 2, the blower 15 can use compressed air to purge the water in the first spiral tube 9 and the sampling housing 3, thereby facilitating the venting of residual water through the second spiral tube 16 and avoiding the problem that water remaining in the sampling tube will affect the accuracy of subsequent sampling.

[0039] In terms of working principle, the microcontroller has a timer module inside, and the timer can be set by programming. The sampling time interval will be set in the software program of the automatic sampler, such as sampling once per hour or sampling at a specific time every day. When the timer reaches the set time value, the corresponding interrupt program is triggered, which in turn controls the negative pressure pump 13 to work and closes the second control valve and the port connecting the three-way valve 10 and the fan 15. Then, the operation of the negative pressure pump 13 can generate negative pressure in the sealed box 2, so that the water sample can be sucked into the receiving cup 12 through the sampling port 4 and the first spiral tube 9 for storage, thereby completing the water sample collection. After the collection is completed, the microcontroller controls the port connecting the three-way valve 10 and the sealed box 2 to close, open the second control valve, close the first control valve, and operate the fan 15. At this time, the operation of the fan 15 can use compressed air to blow the water in the first spiral tube 9 and the sampling shell 3, so as to facilitate the drainage of residual water through the second spiral tube 16. After the drainage is completed, the operation of the second motor 14 can drive the receiving plate 11 to rotate, so that the new receiving cup 12 can move to the bottom of the three-way valve 10 to receive the water sample, thus facilitating multiple water sample collection processes.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic sampler for the timed collection of water samples comprising a support seat (1), characterized in that, Also include: Sealed box (2), the sealed box (2) is fixedly arranged on the support seat (1); Sampling shell (3), the sampling shell (3) is arranged on one side of the support seat (1), the inner bottom wall of the sampling shell (3) is provided with a sampling port (4), the sampling port (4) is provided with a first control valve; Lifting mechanism, the lifting mechanism is arranged between the support seat (1) and the sampling shell (3), for adjusting the sampling depth of the sampling shell (3); Water inlet mechanism, the water inlet mechanism is arranged in the sealed box (2), water can be introduced into the sealed box (2) through the sampling shell (3); The emptying mechanism is arranged in the sealed box (2), for emptying the water in the sampling shell (3).

2. The automatic water sampler of claim 1, wherein, The lifting mechanism comprises: Support frame (5), the support frame (5) is fixedly arranged on the support seat (1), and the lifting port is arranged on the support seat (1); Traction wheel (6), the traction wheel (6) is rotatably arranged in the support frame (5), the traction rope (7) is wound on the traction wheel (6), and one end of the traction rope (7) away from the traction wheel (6) is fixedly connected with the sampling shell (3); First motor (8), the first motor (8) is installed on the support frame (5), and the output end of the first motor (8) is fixedly connected with the traction wheel (6).

3. The automatic water sampler of claim 2, wherein, The water inlet mechanism comprises: First spiral pipe (9), the first spiral pipe (9) is communicated and arranged on the side wall of the sampling shell (3), and one end of the first spiral pipe (9) away from the sampling shell (3) extends into the sealed box (2); Three-way valve (10), the three-way valve (10) is fixedly arranged in the sealed box (2), and one port of the three-way valve (10) is fixedly connected with the first spiral pipe (9); Supporting plate (11), the supporting plate (11) is rotatably arranged on the inner bottom wall of the sealed box (2), a plurality of supporting grooves are arranged on the supporting plate (11), and supporting cups (12) are arranged in the supporting grooves; Negative pressure pump (13), the negative pressure pump (13) is installed on the support seat (1), and the input end of the negative pressure pump (13) is communicated with the sealed box (2).

4. The automatic water sampler of claim 3, wherein, It also includes a single-chip microcomputer and a second motor (14), the single-chip microcomputer is installed on the support seat (1), the second motor (14) is installed on the support seat (1), and the output end of the second motor (14) is fixedly connected with the supporting plate (11), wherein the single-chip microcomputer is electrically connected with the second motor (14) and the negative pressure pump (13) respectively.

5. The automatic water sampler of claim 4, wherein, The emptying mechanism comprises: Fan (15), the fan (15) is installed on the support seat (1), the input end of the fan (15) is communicated with the external environment, and the output end of the fan (15) is communicated with the three-way valve (10); Second spiral pipe (16), the second spiral pipe (16) penetrates and is fixedly arranged on the support seat (1), and the second spiral pipe (16) is communicated with the sampling shell (3).

6. The automatic water sampler of claim 5, wherein, The input end of the fan (15) is provided with a filter screen.

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