Water quality multi-component detection device
By designing an auxiliary injection mechanism on the gas chromatograph and utilizing an electric push rod and screw structure, the problem of sample residue caused by misaligned syringe injection was solved, achieving stable sample injection and efficient detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI YUNPEIQUAN E-COMMERCE CO LTD
- Filing Date
- 2025-09-03
- Publication Date
- 2026-08-04
AI Technical Summary
In existing gas chromatographs, the syringe is prone to misalignment during manual injection, resulting in incomplete injection of the sample into the liner, causing residual contamination and affecting the detection results.
A multi-component water quality detection device was designed, employing an auxiliary sample injection mechanism, including an electric push rod, a moving plate, and a screw structure. This ensures that the syringe needle is always vertically aligned with the center of the sample injection liner, avoiding oblique insertion. Through the cooperation of the electric push rod and the screw, stable sample injection and withdrawal of the syringe are achieved.
This improves sample detection efficiency, reduces the possibility of sample splashing onto the liner sidewall, ensures that the sample completely enters the liner, and enhances the accuracy and reliability of detection.
Smart Images
Figure CN224594585U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water quality testing technology, specifically a multi-component water quality testing device. Background Technology
[0002] Water quality testing is the process of monitoring and analyzing the physical, chemical, and microbiological indicators of water bodies using scientific methods. Its aim is to assess water quality and ensure water safety. Key indicators include temperature, turbidity, pH, dissolved oxygen, heavy metals, and total bacterial count, reflecting the degree of pollution, acid-base balance, toxicity risk, and microbiological safety of the water body. Detection methods include chemical titration, spectrophotometry, and gas chromatography-mass spectrometry, enabling precise quantification of different pollutants. From sampling and preservation to pretreatment and analysis, each step must follow standardized procedures (such as the "Standard Examination Methods for Drinking Water"). This technology is widely used in scenarios such as drinking water plant monitoring, industrial wastewater discharge detection, and river and lake water quality early warning, serving as a crucial line of defense for preventing water pollution and protecting the ecological environment and public health.
[0003] When testing water quality, it is necessary to perform qualitative or quantitative analysis on various physical, chemical, and microbiological indicators in the water body to assess the overall water quality status. Currently, gas chromatography is used to detect and analyze water components when conducting multi-component testing. However, when adding water samples to the gas chromatograph, staff need to manually insert a syringe quickly into the inlet and then quickly withdraw it after injecting the sample. If the syringe is inserted incorrectly due to visual deviation or hand tremors during manual injection, the sample may not be completely injected into the liner and may instead be sprayed onto the outside of the liner or the inner wall of the inlet, causing residual contamination, affecting subsequent sample analysis, and impacting the water quality testing results. Utility Model Content
[0004] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a multi-component water quality detection device. This device solves the problem that when adding water samples to a gas chromatograph, operators must manually use a syringe to add the sample. This requires the operator to quickly insert the syringe into the inlet and then quickly remove it after injection. If the syringe is misaligned during manual injection, the sample may not be fully injected into the liner during subsequent injections, instead spraying onto the outside of the liner or the inner wall of the inlet, causing residual contamination and affecting subsequent sample analysis and the effectiveness of water quality detection.
[0005] (II) Technical Solution To achieve the above objectives, the present invention provides the following technical solution: a multi-component water quality detection device, comprising a gas chromatograph body, an injection liner fixedly installed on the upper surface of the gas chromatograph body, an installation plate fixedly installed on the left surface of the gas chromatograph body, a rotating rod rotatably installed on the upper end of the inner side of the installation plate, and the upper end of the rotating rod rotatably extending through to the top of the installation plate. An auxiliary injection mechanism is mounted on a rotating rod and includes an electric push rod and a moving plate. A mounting block is fixedly installed at the upper end of the rotating rod, and a rectangular groove is opened at the right end of the mounting block. A rectangular plate is slidably installed inside the rectangular groove. The electric push rod is fixedly installed at the right end of the rectangular plate, and the moving plate is fixedly installed on the telescopic end of the electric push rod. An L-shaped plate is fixedly connected to the right end of the upper surface of the moving plate. Both the moving plate and the L-shaped plate have circular holes at their right ends, which are arranged vertically and are located above the injection liner.
[0006] Preferably, the auxiliary injection mechanism further includes two first screws, which are respectively threaded onto the right ends of the movable plate and the L-shaped plate, and the left ends of the two first screws are respectively threaded through the circular holes on the movable plate and the L-shaped plate.
[0007] Preferably, a guide rod is fixedly installed on the left end of the lower surface of the rectangular plate, and the left end of the movable plate slides in contact with the outer surface of the guide rod.
[0008] Preferably, a second screw is rotatably mounted on the left end of the mounting block, and the right end of the second screw rotatably penetrates into the interior of the rectangular groove, with the second screw being threadedly connected to the interior of the rectangular plate.
[0009] Preferably, a limiting groove is formed on the upper inner wall of the rectangular groove, and a limiting plate is slidably installed inside the limiting groove, with the limiting plate fixedly connected to the rectangular plate.
[0010] Preferably, a motor is fixedly installed inside the mounting plate, and the output end of the motor is fixedly connected to the rotating rod.
[0011] (III) Beneficial Effects Compared with the prior art, this utility model provides a water quality multi-component detection device, which has the following beneficial effects: 1. This multi-component water quality detection device, through the setting of the moving plate and L-shaped plate, cooperates with the first screw to ensure that the needle is always vertically aligned with the center of the sample inlet liner, avoiding oblique insertion that would cause the sample to not be completely injected into the liner, so that the sample is always injected from the central axis of the liner, reducing the possibility of sample splashing to the side wall of the liner, thereby improving the detection efficiency of the sample. Attached Figure Description
[0012] Figure 1 This is a top view schematic diagram of the overall structure of the water quality multi-component detection device of this utility model; Figure 2 This is a cross-sectional view of the auxiliary sample introduction mechanism of this utility model; Figure 3 This is a cross-sectional front view of the internal structure of the auxiliary sample introduction mechanism of this utility model; Figure 4 This is a cross-sectional view of the movable plate of this utility model.
[0013] In the diagram: 1. Gas chromatograph body; 2. Injection liner; 3. Mounting plate; 4. Rotating rod; 5. Electric push rod; 6. Moving plate; 7. Mounting block; 8. Rectangular groove; 9. Rectangular plate; 10. L-shaped plate; 11. First screw; 12. Guide rod; 13. Second screw; 14. Limiting groove; 15. Limiting plate; 16. Motor. Detailed Implementation
[0014] 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.
[0015] Please see Figure 1-4 This utility model provides a new technical solution: a water quality multi-component detection device, including a gas chromatograph body 1, an injection liner 2 fixedly installed on the upper surface of the gas chromatograph body 1, an installation plate 3 fixedly installed on the left surface of the gas chromatograph body 1, a rotating rod 4 rotatably installed on the upper end of the inner side of the installation plate 3, and the upper end of the rotating rod 4 rotatably extends through to the top of the installation plate 3. An auxiliary injection mechanism is mounted on the rotating rod 4. The auxiliary injection mechanism includes an electric push rod 5 and a moving plate 6. An installation block 7 is fixedly installed on the upper end of the rotating rod 4. A rectangular groove 8 is opened on the right end of the installation block 7. A rectangular plate 9 is slidably installed inside the rectangular groove 8. The electric push rod 5 is fixedly installed on the right end of the rectangular plate 9. The moving plate 6 is fixedly installed on the telescopic end of the electric push rod 5. An L-shaped plate 10 is fixedly connected to the right end of the upper surface of the moving plate 6. Both the moving plate 6 and the L-shaped plate 10 have circular holes on their right ends. The two circular holes are arranged vertically and are located above the injection liner 2.
[0016] Furthermore, by setting the movable plate 6 and the L-shaped plate 10 in conjunction with the first screw 11, it is ensured that the needle is always vertically aligned with the center of the sample injection liner 2, avoiding oblique insertion that would result in the sample not being fully injected into the liner, and ensuring that the sample is always injected from the central axis of the liner, reducing the possibility of sample splashing onto the side wall of the liner, thereby improving the efficiency of sample detection.
[0017] Furthermore, the auxiliary injection mechanism also includes two first screws 11, which are threadedly installed on the right ends of the moving plate 6 and the L-shaped plate 10, respectively, and the left ends of the two first screws 11 are threaded through the circular holes on the moving plate 6 and the L-shaped plate 10, respectively.
[0018] Furthermore, a guide rod 12 is fixedly installed on the left end of the lower surface of the rectangular plate 9, and the left end of the movable plate 6 slides in contact with the outer surface of the guide rod 12.
[0019] Furthermore, a second screw 13 is rotatably mounted on the left end of the mounting block 7, and the right end of the second screw 13 rotatably penetrates into the interior of the rectangular groove 8. The second screw 13 is threadedly connected to the interior of the rectangular plate 9.
[0020] Furthermore, a limiting groove 14 is provided on the upper inner wall of the rectangular groove 8, and a limiting plate 15 is slidably installed inside the limiting groove 14, and the limiting plate 15 is fixedly connected to the rectangular plate 9.
[0021] Furthermore, a motor 16 is fixedly installed inside the mounting plate 3, and the output end of the motor 16 is fixedly connected to the rotating rod 4.
[0022] Furthermore, when using this testing device to test water quality, firstly, insert the syringe containing the pretreated water sample into the circular hole at the right end of the moving plate 6 and the L-shaped plate 10. By rotating the two first screws 11, the threads at their left ends are pressed against the outer wall of the syringe, fixing the syringe in the center of the two circular holes. Then, rotate the second screw 13 at the left end of the mounting block 7, and through the threaded transmission, push the rectangular plate 9 to slide left and right in the rectangular groove 8, thereby precisely adjusting the alignment of the syringe needle with the center of the inlet of the injection liner 2. After confirming that the syringe position is correct, start the electric push rod 5, which pushes the moving plate 6 downward, so that the syringe needle vertically pierces the septum of the injection liner 2 until it reaches the preset depth. At this time, the operator can manually control the syringe push rod to inject the sample into the injection port of the gas chromatograph body 1. After the injection is completed, the electric push rod 5 retracts in the reverse direction, driving the syringe out of the injection liner 2, and entering the subsequent chromatographic separation and detection process. When the injection is not needed, the motor 16 can be started to drive the rotating rod 4 and the mounting block 7 to rotate away from the top of the injection liner 2.
[0023] Structural Description: Gas Chromatograph Body 1: Core equipment for multi-component water quality detection. It performs qualitative and quantitative analysis of various components in water samples through chromatographic separation and detection technology. The gas chromatograph is existing technology, and the specific model is Shimadzu GC-2010Plus. Injection liner 2: Connects to the gas chromatograph body 1, provides an injection channel for the syringe, and guides the water sample into the instrument for detection; Mounting plate 3: Fixed to the left surface of the gas chromatograph body 1, used to mount components such as rotating rod 4 and motor 16, and to provide mounting support for the auxiliary injection mechanism; Rotating rod 4: Rotatably mounted on mounting plate 3, it rotates by connecting to motor 16, driving the auxiliary injection mechanism to rotate as a whole, and adjusting the position of the auxiliary injection mechanism; Electric push rod 5: Installed on the right end of rectangular plate 9, with telescopic end connected to movable plate 6, which can control the movement of movable plate 6 to realize the advancement and retraction of syringe; Movable plate 6: Connected to the telescopic end of electric push rod 5, it drives the syringe to slide along guide rod 12 to ensure stable movement of the syringe during sample injection; Mounting block 7: Fixed to the upper end of the rotating rod 4, with a rectangular groove 8 inside for mounting the rectangular plate 9, realizing the integration and connection of the auxiliary sample injection mechanism components; Rectangular groove 8: It is located at the right end of the mounting block 7 to provide sliding space for the rectangular plate 9, and works with the second screw 13 to achieve lateral movement adjustment of the rectangular plate 9; Rectangular plate 9: slides within rectangular groove 8, carries electric push rod 5, connects to moving plate 6, transmits power and enables fine-tuning of syringe position; L-shaped plate 10: fixed to the right end of the upper surface of the movable plate 6, forming a syringe mounting space together with the movable plate 6, and clamping the syringe with the first screw 11. First screw 11: There are two screws in total. They are threaded on the right end of the movable plate 6 and the L-shaped plate 10. After rotation, they can press against the outer wall of the syringe and fix it in the center of the circular hole. Guide rod 12: Fixed to the left end of the lower surface of rectangular plate 9, it provides guidance for the movement of moving plate 6, ensuring smooth sliding of moving plate 6 and improving sample injection accuracy; The second screw 13 is rotatably installed on the left end of the mounting block 7 and threadedly connected to the rectangular plate 9. It can achieve lateral fine adjustment of the rectangular plate 9 in the rectangular groove 8 by rotating it. Limiting groove 14: It is formed on the inner wall of the rectangular groove 8 and cooperates with the limiting plate 15 to limit the movement range of the rectangular plate 9; Limiting plate 15: It is fixedly connected to the rectangular plate 9 and slides within the limiting groove 14 to limit the movement range of the rectangular plate 9; Motor 16: Installed inside mounting plate 3, with its output end connected to rotating rod 4, providing power to rotating rod 4 and controlling the rotation of auxiliary injection mechanism to facilitate injection and return to position.
[0024] 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. A multi-component water quality detection device, comprising a gas chromatograph body (1), wherein an injection liner (2) is fixedly installed on the upper surface of the gas chromatograph body (1), characterized in that: A mounting plate (3) is fixedly installed on the left surface of the gas chromatograph body (1). A rotating rod (4) is rotatably installed on the upper part of the mounting plate (3). The upper part of the rotating rod (4) rotates through to the top of the mounting plate (3). The auxiliary injection mechanism is set on the rotating rod (4). The auxiliary injection mechanism includes an electric push rod (5) and a moving plate (6). The upper end of the rotating rod (4) is fixedly installed with a mounting block (7). The right end of the mounting block (7) is provided with a rectangular groove (8). A rectangular plate (9) is slidably installed inside the rectangular groove (8). The electric push rod (5) is fixedly installed on the right end of the rectangular plate (9). The moving plate (6) is fixedly installed on the telescopic end of the electric push rod (5). The right end of the upper surface of the moving plate (6) is fixedly connected with an L-shaped plate (10). The right ends of the moving plate (6) and the L-shaped plate (10) are both provided with circular holes. The two circular holes are arranged vertically and vertically. Both circular holes are located above the injection liner (2).
2. The water quality multi-component detection device according to claim 1, characterized in that: The auxiliary injection mechanism also includes two first screws (11), which are threadedly installed on the right end of the moving plate (6) and the L-shaped plate (10), respectively, and the left end of the two first screws (11) is threaded through the circular holes on the moving plate (6) and the L-shaped plate (10), respectively.
3. The water quality multi-component detection device according to claim 1, characterized in that: A guide rod (12) is fixedly installed on the left end of the lower surface of the rectangular plate (9), and the left end of the movable plate (6) slides in contact with the outer surface of the guide rod (12).
4. The water quality multi-component detection device according to claim 1, characterized in that: The left end of the mounting block (7) is rotatably mounted with a second screw (13), and the right end of the second screw (13) rotatably penetrates into the interior of the rectangular groove (8). The second screw (13) is threadedly connected to the interior of the rectangular plate (9).
5. The water quality multi-component detection device according to claim 1, characterized in that: A limiting groove (14) is provided on the upper inner wall of the rectangular groove (8), and a limiting plate (15) is slidably installed inside the limiting groove (14). The limiting plate (15) is fixedly connected to the rectangular plate (9).
6. The water quality multi-component detection device according to claim 1, characterized in that: The motor (16) is fixedly installed inside the mounting plate (3), and the output end of the motor (16) is fixedly connected to the rotating rod (4).