Quantitative sampling device

Abstract

The utility model discloses a sampling device for realizing quantification, which relates to the technical field of sampling and comprises a sampling tube, a pull rod is slidably connected in the sampling tube, a piston plate is fixedly mounted at one end, extending into the sampling tube, of the pull rod, and a fixing block is fixedly mounted on the surface of the sampling tube. A sliding rod is slidably connected in the fixed block, a limiting sliding plate fixedly sleeves the sliding rod, the limiting sliding plate is slidably connected in the fixed block, a reset spring movably sleeves the sliding rod, and the upper end of the reset spring is fixedly connected with the limiting sliding plate, so that the sealing cover is not in contact with the suction inlet of the sampling tube, and the sampling tube is further opened; when the sliding rod is not pressed, the sliding rod is reset through the elastic force of the reset spring, so that the sliding rod is reset, the suction inlet of the sampling tube is sealed by the sealing cover, external impurities are prevented from entering the sampling tube when the sampling tube is not used, the protection on the sampling tube is improved, and the sealing performance of the sampling tube is ensured.

Description

Technical Field

[0001] This utility model relates to the field of sampling technology, and in particular to a sampling device for achieving quantitative sampling. Background Technology

[0002] Propionyl chloride handling precautions: Operate in a closed system with adequate local exhaust ventilation. Operators must be specially trained and strictly adhere to operating procedures. It is recommended that operators wear self-priming filter respirators (full face mask), rubberized protective clothing, and oil-resistant rubber gloves. Keep away from sources of ignition and heat; smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Avoid generating fumes. Prevent the release of fumes and vapors into the workplace air. Avoid contact with oxidizers, alcohols, and alkalis. Pay particular attention to avoiding contact with water. Handle with care to prevent damage to packaging and containers. Provide appropriate types and quantities of fire-fighting equipment and spill response equipment. Empty containers may contain hazardous residues.

[0003] A search revealed a Chinese patent publication number: CN202022852617.X, which discloses a propionyl chloride sampling device. This patent uses an air bladder on the outside of the sampling cylinder to seal the gap between the sampling cylinder and the opening during sampling, thus preventing material volatilization and leakage. The scale on the cylinder wall records the sampling depth, ensuring sample accuracy. The piston, combined with the one-way valve on the discharge pipe, makes the sampling process faster and more convenient. The sample is never exposed to air, reducing material volatilization.

[0004] Although the aforementioned patent can prevent material volatilization and leakage, the aforementioned propionyl chloride sampling device still has the following problem: when not in use, the opening of the sampling tube cannot be sealed, which can easily cause external impurities to enter the interior of the sampling tube.

[0005] To address the aforementioned problems, a quantitative sampling device is proposed. Utility Model Content

[0006] The purpose of this invention is to solve at least one of the technical problems existing in the prior art, and to provide a sampling device that can achieve quantitative sampling and solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a sampling device for quantitative sampling, comprising a sampling tube, a pull rod slidably connected inside the sampling tube, a piston plate fixedly installed at one end of the pull rod extending into the sampling tube, a fixing block fixedly installed on the surface of the sampling tube, a slide rod slidably connected inside the fixing block, a limiting slide plate fixedly sleeved on the slide rod, the limiting slide plate slidably connected inside the fixing block, a return spring movably sleeved on the slide rod, the upper end of the return spring fixedly connected to the limiting slide plate, the lower end of the return spring fixedly connected to the inner wall of the fixing block, and a sealing cap fixedly installed at the lower end of the slide rod.

[0008] Preferably, the sampling tube is provided with a scale.

[0009] Preferably, the upper end of the slide bar is hemispherical.

[0010] Preferably, the top of the fixing block is provided with a slide rail, and a slider is slidably connected inside the slide rail.

[0011] Preferably, a limiting guide rod is fixedly installed inside the slide rail, the surface of the limiting guide rod is slidably connected to the inside of the slider, and a spring is movably sleeved on the surface of the limiting guide rod. The end of the spring near the slider is fixedly connected to the slider, and the end of the spring away from the slider is fixedly connected to the slide rail.

[0012] Preferably, a compression block is fixedly installed on the top of the slider.

[0013] Preferably, one side of the extrusion block is inclined, the extrusion block contacts the upper end of the slide rod, and a drive groove is provided on one side of the pull rod. The drive groove is inclined, and one end of the extrusion block slides inside the drive groove.

[0014] Preferably, a rotating wheel is rotatably connected to one end of the extrusion block located inside the drive groove, and the rotating wheel is rolled inside the drive groove.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] (1) The sampling device that achieves quantitative sampling prevents the sealing cap from contacting the inlet of the sampling tube, thereby opening the sampling tube. When the sliding rod is not pressed, the sliding rod is reset by the elastic force of the reset spring, thereby resetting the sliding rod and sealing the inlet of the sampling tube with the sealing cap, thereby preventing external impurities from entering the inside of the sampling tube when it is not in use, improving the protection of the sampling tube and ensuring the sealing performance of the sampling tube.

[0017] (2) The sampling device that achieves quantitative sampling makes the inclined surface of the drive groove squeeze the extrusion block and the rotating wheel, thereby making the slider slide inside the slide and on the surface of the limiting guide rod, and then making the slider squeeze the spring spring. When the extrusion block moves, it will squeeze the slide rod, thereby making the slide rod move downward, and then opening the lower end of the sampling tube, which is convenient for controlling the sealing cover, and thus convenient for automatically opening the sealing cover, improving the convenience of opening the sealing cover. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0019] Figure 1 This is a schematic diagram of the structure of a sampling device for achieving quantitative sampling according to the present invention;

[0020] Figure 2 This is a schematic diagram of the extrusion block of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the sampling tube of this utility model;

[0022] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This utility model Figure 3 Enlarged diagram of point B in the middle.

[0024] Reference numerals in the attached drawings: 1. Sampling tube; 2. Fixing block; 3. Sealing cap; 4. Slide rod; 5. Pull rod; 6. Squeezing block; 7. Rotating wheel; 8. Piston plate; 9. Return spring; 10. Restricting slide plate; 11. Drive groove; 12. Slide track; 13. Slider; 14. Elastic spring; 15. Restricting guide rod. Detailed Implementation

[0025] 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.

[0026] To further understand the content of this utility model, a detailed description of this utility model will be provided in conjunction with the accompanying drawings.

[0027] Please see Figure 1-5This utility model provides a technical solution: a sampling device for achieving quantitative sampling, including a sampling tube 1, a pull rod 5 slidably connected inside the sampling tube 1, a piston plate 8 fixedly installed at one end of the pull rod 5 extending into the sampling tube 1, and a scale provided on the sampling tube 1.

[0028] When sampling propionyl chloride, the sampling tube 1 is inserted into the container, and then the lever 5 is pulled, causing the piston plate 8 to slide inside the lever 5, thereby drawing the propionyl chloride solution into the sampling tube 1, thus completing the sampling. The sampling is quantitatively measured through the scale on the sampling tube 1, thereby improving the accuracy of the sampling.

[0029] A fixing block 2 is fixedly installed on the surface of the sampling tube 1. A sliding rod 4 is slidably connected inside the fixing block 2. The upper end of the sliding rod 4 is hemispherical. A limiting slide plate 10 is fixedly sleeved on the sliding rod 4. The limiting slide plate 10 is slidably connected inside the fixing block 2. A return spring 9 is movably sleeved on the sliding rod 4. The upper end of the return spring 9 is fixedly connected to the limiting slide plate 10. The lower end of the return spring 9 is fixedly connected to the inner wall of the fixing block 2. A sealing cover 3 is fixedly installed at the lower end of the sliding rod 4.

[0030] Pressing the slide bar 4 causes it to slide inside the fixed block 2, which in turn causes the limiting slide plate 10 to press against the return spring 9, thus preventing the sealing cover 3 from contacting the inlet of the sampling tube 1 and opening the sampling tube 1. When the slide bar 4 is not pressed, it returns to its original position by the elastic force of the return spring 9, thus sealing the inlet of the sampling tube 1 with the sealing cover 3. This prevents external impurities from entering the interior of the sampling tube 1 when it is not in use, improving the protection of the sampling tube 1 and ensuring its airtightness.

[0031] A slide rail 12 is provided on the top of the fixed block 2. A slider 13 is slidably connected inside the slide rail 12. A limiting guide rod 15 is fixedly installed inside the slide rail 12. The surface of the limiting guide rod 15 is slidably connected to the inside of the slider 13. A spring spring 14 is movably sleeved on the surface of the limiting guide rod 15. The end of the spring spring 14 near the slider 13 is fixedly connected to the slider 13, and the end of the spring spring 14 away from the slider 13 is fixedly connected to the slide rail 12. A pressing block 6 is fixedly installed on the top of the slider 13. One side of the pressing block 6 is inclined. The pressing block 6 contacts the upper end of the slide rod 4. A drive groove 11 is provided on one side of the pull rod 5. The drive groove 11 is inclined. One end of the pressing block 6 slides inside the drive groove 11. A rotating wheel 7 is rotatably connected to the end of the pressing block 6 inside the drive groove 11. The rotating wheel 7 rolls inside the drive groove 11.

[0032] Pulling the lever 5 upwards will cause the inclined surface of the drive groove 11 to press against the extrusion block 6 and the rotating wheel 7, thereby causing the slider 13 to slide inside the slide rail 12 and on the surface of the limiting guide rod 15, which in turn causes the slider 13 to press against the spring spring 14. When the extrusion block 6 moves, it will press against the slide rod 4, which will cause the slide rod 4 to move downwards, thereby opening the lower end of the sampling tube 1, making it easier to control the sealing cover 3, and thus making it easier to automatically open the sealing cover 3, improving the convenience of opening the sealing cover 3.

[0033] Working principle:

[0034] Pulling the lever 5 upwards will cause the inclined surface of the drive groove 11 to press against the extrusion block 6 and the rotating wheel 7, thereby causing the slider 13 to slide inside the slide rail 12 and on the surface of the limiting guide rod 15, which in turn causes the slider 13 to press against the spring spring 14. When the extrusion block 6 moves, it will press against the slide rod 4, causing the slide rod 4 to move downwards, which in turn causes the slide rod 4 to slide inside the fixed block 2, which in turn causes the limiting slide plate 10 to press against the return spring 9, thereby preventing the sealing cover 3 from contacting the inlet of the sampling tube 1, thus opening the sampling tube 1. When the slide rod 4 is not pressed, the slide rod 4 will return to its original position due to the elastic force of the return spring 9, thus resetting the slide rod 4 and sealing the inlet of the sampling tube 1 with the sealing cover 3, thereby preventing external impurities from entering the interior of the sampling tube 1 when it is not in use.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sampling device for achieving quantitative sampling, comprising a sampling tube (1), characterized in that: The sampling tube (1) is internally connected to a pull rod (5), and a piston plate (8) is fixedly installed at one end of the pull rod (5) extending into the sampling tube (1). A fixing block (2) is fixedly installed on the surface of the sampling tube (1). A slide rod (4) is internally connected to the fixing block (2). A limiting slide plate (10) is fixedly sleeved on the slide rod (4). The limiting slide plate (10) is internally connected to the fixing block (2). A return spring (9) is movably sleeved on the slide rod (4). The upper end of the return spring (9) is fixedly connected to the limiting slide plate (10). The lower end of the return spring (9) is fixedly connected to the inner wall of the fixing block (2). A sealing cap (3) is fixedly installed at the lower end of the slide rod (4).

2. The sampling device for achieving quantitative sampling according to claim 1, characterized in that: The sampling tube (1) is equipped with a scale.

3. The sampling device for achieving quantitative sampling according to claim 2, characterized in that: The upper end of the slide bar (4) is hemispherical.

4. A sampling device for achieving quantitative sampling according to claim 3, characterized in that: The top of the fixed block (2) is provided with a slide (12), and a slider (13) is slidably connected inside the slide (12).

5. A sampling device for achieving quantitative sampling according to claim 4, characterized in that: A limiting guide rod (15) is fixedly installed inside the slide rail (12). The surface of the limiting guide rod (15) is slidably connected to the inside of the slider (13). A spring spring (14) is movably sleeved on the surface of the limiting guide rod (15). The end of the spring spring (14) close to the slider (13) is fixedly connected to the slider (13), and the end of the spring spring (14) away from the slider (13) is fixedly connected to the slide rail (12).

6. A sampling device for achieving quantitative sampling according to claim 5, characterized in that: A compression block (6) is fixedly installed on the top of the slider (13).

7. A sampling device for achieving quantitative sampling according to claim 6, characterized in that: The extrusion block (6) has an inclined shape on one side. The extrusion block (6) is in contact with the upper end of the slide bar (4). A drive groove (11) is provided on one side of the pull rod (5). The drive groove (11) is set in an inclined shape. One end of the extrusion block (6) slides inside the drive groove (11).

8. A sampling device for achieving quantitative sampling according to claim 7, characterized in that: The extrusion block (6) is rotatably connected to a rotating wheel (7) at one end inside the drive groove (11), and the rotating wheel (7) is rolled inside the drive groove (11).

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