Automatic sampling system with liquid discharge function
By using an automated sampling system and the linkage control of switching modules and anti-drip devices, the risks and contamination problems in the sampling process of chemical experiments have been solved, realizing automated sampling and drainage functions, and improving sampling accuracy and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG HONGLIU TECHNOLOGY CO LTD
- Filing Date
- 2025-06-21
- Publication Date
- 2026-07-24
AI Technical Summary
In chemical experiments, the sampling process of synthesized products relies on manual control, which poses risks to the accuracy of sampling data, operational complexity and safety, as well as the possibility of secondary contamination of samples.
An automatic sampling system was designed. Through the linkage control of the switching module and the anti-drip device, the automatic movement of the sampling needle and the switching of the liquid flow direction are realized. Combined with the XYZ axis servo motor and programmable controller, the automatic sampling and liquid discharge functions are realized.
The sampling process has been automated, reducing operational risks and the possibility of sample contamination, and improving the accuracy and security of sampling data.
Smart Images
Figure CN224552803U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of chemical experimental equipment, and in particular to an automatic sampling system with a liquid drainage function. Background Technology
[0002] Currently, in the chemical industry, the sampling of synthesized products during experimental verification is done manually. This involves several issues: the sampling intervals are controlled by the sampling personnel, who typically oversee the entire laboratory simultaneously, leading to multiple priorities and potentially affecting the accuracy of the sampling data; furthermore, the sampling process requires personnel to control the switching of the experimental apparatus's drain outlets, which is complex and carries risks of misoperation, safety hazards, and secondary contamination of the samples. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic sampling system for sampling synthetic products, which has the functions of draining and cleaning, preventing dripping and coordinate positioning.
[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an automatic sampling system with a drainage function, wherein a sampling pipe and a collection pipe are connected to a switching module via different pipes; wherein the sampling pipe includes a sampling needle connected to the bottom of the pipe and an anti-drip device for preventing liquid from dripping from the sampling needle; the switching module switches the liquid flow to the sampling pipe or the collection pipe, and after switching to the sampling pipe, the switching module and the anti-drip device can control the sampling pipe to drain or sample through the opening or closing linkage.
[0005] Preferably, the drainage is configured such that the sampling needle can move to the waste cleaning area, and by switching to the sampling pipe, opening the switching module and simultaneously closing the anti-drip device, waste liquid for a preset time can be discharged.
[0006] Preferably, the sampling is configured such that the sampling needle can move from the waste cleaning area to above the sampling bottle and insert downwards, injecting liquid by opening the switching module while simultaneously closing the anti-drip device.
[0007] Preferably, the sampling needle can be moved from the waste discharge cleaning area to above the sampling bottle by turning off the switching module and turning on the anti-drip device, in order to prevent liquid from dripping.
[0008] Preferably, the switching module is a three-way valve with normally open and normally closed ports, and is configured to switch the passage in response to a control signal.
[0009] Preferably, it includes a control module for a programmable controller; used to receive timing signals, switching signals or communication interface signals, and simultaneously issue control signals, capable of controlling the linkage opening or closing of the switching module and the anti-drip device.
[0010] Preferably, it includes an execution module; the execution module includes an X-axis servo motor, a Y-axis servo motor and a Z-axis servo motor, which are respectively used to drive the sampling needle to move on the X, Y and Z axes in response to control signals.
[0011] Preferably, it includes a sampling bottle holder for placing the sampling bottle and is capable of configuring the X-axis and Y-axis coordinates corresponding to the sampling bottle for accurate movement of the sampling needle.
[0012] Preferably, it also includes a tripping mechanism for driving the sampling needle to insert into or detach from the sampling bottle.
[0013] Preferably, it includes an instrument module and a collection container; the instrument module is connected upstream of the switching module, the collection container is connected to the collection pipe, and the instrument module is used for holding and reacting liquid materials.
[0014] The beneficial effects of this utility model are: firstly, pollution prevention and control, the mechanical linkage between the switching module and the anti-drip device prevents residual droplets in the sampling needle from entering; secondly, the independent space design of the waste discharge and cleaning area avoids waste liquid from contacting the sampling bottle; and thirdly, the execution module drives the sampling needle to move, eliminating the risk of manual intervention. Attached Figure Description
[0015] Figure 1 This is a structural connection diagram of the automatic sampling system with drainage function described in this utility model;
[0016] Figure 2 This is a schematic diagram of the principle structure of the automatic sampling system with drainage function described in this utility model.
[0017] Figure 3 This is a schematic diagram of the structure of the execution module described in this utility model;
[0018] Figure 4 This is a schematic diagram of the waste discharge and cleaning area described in this utility model. Detailed Implementation
[0019] 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. The described embodiments are some, but not all, of the embodiments of this utility model.
[0020] Example 1
[0021] Reference Figure 1-4 As illustrated, this embodiment proposes an automatic sampling system with a drainage function, including a sampling pipe 100, a collection pipe 200, a switching module 300, a control module 400, an execution module 500, an instrument module 600, and a collection container 700. The sampling pipe 100 and the collection pipe 200 are connected to the downstream of the switching module 300 via different pipes, and are connected in parallel. The instrument module 600 is connected upstream of the switching module 300, and the collection container 700 is connected to the collection pipe 200. The instrument module 600 is used for holding and reacting liquid materials. The liquid material of the target experiment is input into the instrument module 600, reacts, and produces the liquid to be sampled. When the switching module 300 switches to the collection pipe 200, the liquid flows from the collection pipe 200 into the collection container 700 for collection.
[0022] Specifically, the sampling conduit 100 includes a sampling needle 101 connected to the bottom of the conduit, an anti-drip device 102 for preventing liquid from dripping from the sampling needle 101, and a sampling bottle 103 for sampling.
[0023] The switching module 300 can switch the liquid flow to the sampling pipe 100 or the collection pipe 200. After switching to the sampling pipe 100, the switching module 300 and the anti-drip device 102 can control the sampling pipe 100 to drain or sample.
[0024] This embodiment includes both the drainage state and the sampling state:
[0025] The drainage configuration allows the sampling needle 101 to move to the waste cleaning area, and by switching to the sampling pipe 100, opening the switching module 300, and simultaneously closing the anti-drip device 102, waste liquid can be discharged for a preset time. The sampling configuration allows the sampling needle 101 to move from the waste cleaning area to above the sampling bottle 103 and insert downwards, injecting liquid by opening the switching module 300 and simultaneously closing the anti-drip device 102.
[0026] During the process of moving from the waste cleaning area to above the sampling bottle 103, the sampling needle 101 simultaneously activates the anti-drip device 102 by closing the switching module 300, which can prevent liquid from dripping. This embodiment also includes a tripping mechanism for driving the sampling needle 101 to insert into or detach from the sampling bottle 103.
[0027] In one embodiment, the switching module 300 is a three-way valve with normally open and normally closed positions, configured to switch the flow path in response to a control signal. The control signal is generated by the control module 400, which is a programmable controller. The three-way valve responds to the electrical signal from the control module 400 by switching the liquid flow direction through valve core displacement, and also has the function of opening and closing the pipeline.
[0028] When the three-way valve is energized, it controls the liquid flow state of the sampling pipe 100 in conjunction with the anti-drip device 102. In this embodiment, the anti-drip device 102 can be a solenoid valve, which forms a negative pressure in the pipe to hold the liquid in place, thereby counteracting gravity and preventing it from dripping.
[0029] In one embodiment, the anti-drip device 102 can also be a pneumatic clamp valve covering the inlet hose of the sampling needle 101, with a built-in spring reset mechanism. When the switching module 300 is closed, the clamping force of the clamp will block the hose channel. When the switching module 300 is closed, its air path will be synchronously inflated to perform clamping.
[0030] Furthermore, the execution module 500 includes an X-axis servo motor 501, a Y-axis servo motor 502, and a Z-axis servo motor 503, which are used to drive the sampling needle 101 to move along the X, Y, and Z axes in response to control signals. This embodiment also includes a sampling bottle bracket for placing the sampling bottle 103 and can configure the X-axis and Y-axis coordinates of the sampling bottle 103 for accurate movement of the sampling needle 101. By setting the coordinates, the execution module 500 drives the sampling needle 101 to move to the target coordinate position according to the configured coordinate information. This is a mature existing control technology and will not be described in detail here.
[0031] In this embodiment, the control module 400 is a programmable controller, which is used to receive timing signals, switch signals or communication interface signals, and simultaneously issue control signals. It can control the linkage opening or closing of the switching module 300 and the anti-drip device 102, and control the execution module 500 to drive the sampling needle 101 to move accurately according to the target coordinates.
[0032] It should be noted that this utility model aims to solve existing problems by building an automated system or a structural system for connecting devices. The devices involved in the automated system are all existing mature technologies. For example, the control module 400 is an industrial PLC module (physical entity). Its programming, control signal reception, processing, and transmission are all existing mature technologies and do not involve any improvement of the technology itself. For example, the specific principle of how to control the execution module 500 to drive the sampling needle 101 to move, and how the control module 400 controls the switching module 300 and the anti-drip device 102 to open and close, etc. This embodiment aims to use the above-mentioned existing mature automation technologies to combine the devices into an automated system. It aims to build the framework of the system structure, rather than the automation technology itself. It is a non-essential technical feature of this application and therefore will not be described in detail.
[0033] More specifically, the automated sampling system with drainage function in this embodiment replaces human sampling personnel and automatically completes the sampling process at fixed times and cycles. The entire sampling process is fully automated, eliminating the need for human intervention and reducing operational risks and the possibility of secondary sample contamination.
[0034] The device uses a programmable logic controller (PLC) as the control system and an XYZ three-axis stepper motor with a synchronous belt as the execution module 500. The system's status detection and control can be achieved through a human-machine interface as the interactive window.
[0035] The specific workflow in actual application is as follows:
[0036] Preparation steps:
[0037] When the device receives a sampling trigger signal, such as a timing signal, a switch signal, or a communication interface signal, it places the sampling bottle 103 onto the sampling bottle holder and sets the corresponding X-axis and Y-axis coordinates of the sampling bottle 103; and selects the sampling signal triggering method (timing signal, switch signal, communication interface signal, etc.).
[0038] Operation process:
[0039] When the sampling equipment is not in the sampling process, the product flows to the collection container 700 through the normally open outlet of the three-way valve. When the experimental instrument sends a sampling signal to the sampling equipment, the sampling equipment performs the action.
[0040] 1. Move the sampling needle 101 of the device to the waste discharge and cleaning area (skip this step if it is in the current position);
[0041] 2. Open the three-way valve to switch the liquid to sampling pipe 100;
[0042] 3. Drain the liquid at the waste discharge and cleaning point for a certain period of time; the time can be set according to actual needs.
[0043] 3. Close the three-way valve, and at the same time, the anti-drip device 102 starts to operate;
[0044] 4. Move the sampling needle 101 above the sampling bottle 103 (headspace bottle), and then insert it downwards into the sampling bottle 103;
[0045] 5. Open the three-way valve to inject the liquid into the headspace bottle. The injection time can be set according to actual needs.
[0046] 6. Close the three-way valve, and the anti-drip device 102 will start operating simultaneously;
[0047] 7. The tripping mechanism is activated, and sampling needle 101 moves upward to return to its original position;
[0048] 8. Sampling needle 101 moves to the waste discharge and cleaning area;
[0049] 9. The anti-drip device 102 stops operating;
[0050] 10. Sampling action completed, sampling quantity incremented by 1, and waiting for the next sampling trigger signal.
[0051] This embodiment can automatically sample at regular intervals and in quantitative quantities, automatically switch the liquid path with a three-way valve, and eliminate contamination by combining an anti-drip device, thus eliminating the risks of manual operation and sample contamination.
[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit the scope of protection of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description and ideas. It is neither necessary nor possible to exhaustively describe all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the technical solution of this utility model should be covered within the scope of protection of the claims of this utility model.
Claims
1. An automatic sampling system with a drainage function, characterized in that: The sampling pipe (100) and the collection pipe (200) are connected behind the switching module (300) by different pipes; The sampling pipe (100) includes a sampling needle (101) connected to the bottom of the pipe and an anti-drip device (102) for preventing liquid from dripping from the sampling needle (101). The switching module (300) switches the liquid flow to the sampling pipe (100) or the collection pipe (200). After switching to the sampling pipe (100), the switching module (300) and the anti-drip device (102) can control the sampling pipe (100) to drain or sample through the opening or closing linkage.
2. The automatic sampling system with drainage function according to claim 1, characterized in that: The drainage is configured such that the sampling needle (101) can move to the waste cleaning area, and by switching to the sampling pipe (100), opening the switching module (300), and simultaneously closing the anti-drip device (102), waste liquid of a preset duration can be discharged.
3. The automatic sampling system with drainage function according to claim 2, characterized in that: The sampling is configured such that the sampling needle (101) can move from the waste cleaning area to above the sampling bottle (103) and insert downwards, injecting liquid by opening the switching module (300) and simultaneously closing the anti-drip device (102).
4. The automatic sampling system with drainage function according to claim 3, characterized in that: The sampling needle (101) can move from the waste cleaning area to above the sampling bottle (103) by turning off the switching module (300) and turning on the anti-drip device (102) to prevent liquid from dripping.
5. The automatic sampling system with drainage function according to claim 1, characterized in that: The switching module (300) is a three-way valve with normally open and normally closed ports, and is configured to switch the passage in response to a control signal.
6. The automatic sampling system with drainage function according to claim 1, characterized in that: Includes a control module (400) for a programmable controller; It is used to receive timing signals, switch signals or communication interface signals, and at the same time send control signals, and can control the linkage opening or closing of the switching module (300) and the anti-drip device (102).
7. The automatic sampling system with drainage function according to claim 1, characterized in that: Includes execution module (500); The execution module (500) includes an X-axis servo motor (501), a Y-axis servo motor (502), and a Z-axis servo motor (503), which are used to drive the sampling needle (101) to move on the X, Y, and Z axes in response to control signals.
8. The automatic sampling system with drainage function according to claim 3, characterized in that: It includes a sampling bottle holder for placing the sampling bottle (103) and is capable of configuring the X-axis and Y-axis coordinates of the sampling bottle (103) for accurate movement of the sampling needle (101).
9. The automatic sampling system with drainage function according to claim 3, characterized in that: It also includes a tripping mechanism for driving the sampling needle (101) to insert into or detach from the sampling bottle (103).
10. The automatic sampling system with drainage function according to claim 1, characterized in that: Includes an instrument module (600) and a collection container (700); The instrument module (600) is connected upstream of the switching module (300), the collection container (700) is connected to the collection pipe (200), and the instrument module (600) is used for the holding and reaction of liquid materials.