An easy-to-use liquid sampling device

Abstract

This utility model relates to the technical field of liquid sampling equipment, and in particular to an easy-to-operate liquid sampling device that solves the problems of easy sample contamination, unstable sampling posture, easy leakage during sample transfer, and difficulty in adapting to complex liquid sampling needs in the prior art. An easy-to-operate liquid sampling device includes a sampling cup with a top cover fixedly installed at the top, and a dustproof flip cover movably installed at the top of the top cover. The bottom of the sampling cup has an opening, and an adsorption structure is installed at the bottom of the sampling cup corresponding to the opening. This utility model isolates external impurities through the double-sealing design of the dustproof flip cover, maintains the vertical posture of the sampling cup with the help of a counterweight base, and achieves bidirectional and efficient liquid intake by balancing air pressure with a vent pipe. After sampling, the sample is sealed by the sealing suction cup and the dustproof flip cover, effectively improving the convenience, accuracy, and reliability of the sampling operation, and adapting to various liquid types and sampling scenarios.

Description

Technical Field

[0001] This utility model relates to the field of liquid sampling equipment technology, and in particular to a liquid sampling device that is easy to operate. Background Technology

[0002] In the production and testing processes of chemical, food, and pharmaceutical industries, liquid sampling is a crucial step in obtaining material characteristics and monitoring product quality. Its core requirements focus on ease of operation, sampling accuracy, sample contamination prevention, and adaptability to various scenarios. As the industry's demands for testing accuracy and operational safety increase, traditional liquid sampling methods are gradually revealing their shortcomings: for example, some sampling devices rely on manual handheld insertion into containers, which is not only difficult to adapt to deep storage tanks or reaction vessels but also poses safety risks due to direct contact between operators and liquids (such as burns from corrosive liquids or scalds from high-temperature liquids); while some simple sampling cups have a simple structure, they suffer from unstable posture during sampling, susceptibility to external dust contamination, and low liquid inlet efficiency. Especially when handling viscous liquids or liquids containing a small amount of particles, insufficient sample volume or sample stratification can easily occur, failing to meet the representativeness requirements of subsequent testing.

[0003] In existing technologies, some improvements have been proposed to address the sampling challenges. For example, a liquid sampler structure is proposed in Chinese patent CN222353579U. This patent solves the problems of difficult sampling at deeper locations and avoiding steam burns by setting up a sampling cup, a sampling rod, and a tilting component. The sampling rod extends the sampling depth, and the tilting component allows the sampling cup to be tilted and poured, thus solving the problems of difficult sampling at deeper locations and avoiding steam burns. At the same time, the detachable connection of the extension rod adapts to containers of different depths, improving the convenience and safety of sampling to a certain extent. However, the aforementioned patent only addresses the core pain points of "deep sampling" and "post-sampling pouring," without optimizing for sample contamination prevention, liquid inlet efficiency, and compatibility with complex liquids during the sampling process. Its sampling cup lacks a dustproof and impurity-proof structure, making it easy for external dust to fall into the cup and contaminate the sample during idle periods or sampling. Sampling relies solely on a single opening for liquid inlet, without considering pressure balance design. This results in slow liquid inlet speed when handling viscous liquids, and the lack of an active stabilization structure for the sampling posture makes the sampling cup prone to tilting due to liquid flow within the container, affecting sampling accuracy. Furthermore, the patent does not address post-sampling sample sealing design, making it easy for samples to spill during lifting, thus failing to guarantee sample integrity before transfer to the testing stage.

[0004] Therefore, we propose an easy-to-operate liquid sampling device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an easy-to-operate liquid sampling device that solves the problems of easy sample contamination, unstable sampling posture, easy leakage during sample transfer, and difficulty in adapting to complex liquid sampling needs in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A user-friendly liquid sampling device includes a sampling cup, with a set of hanging rings fixedly installed on both sides near the top of the sampling cup, and a vent tube fixedly connected to the side of the sampling cup near the bottom, the vent tube communicating with the interior of the sampling cup. The device also includes:

[0008] The top of the sampling cup is fixedly fitted with a top cover, and the top of the top cover is movably fitted with a dustproof flip cover.

[0009] The sampling cup has an opening at the bottom, and an adsorption structure is installed at the bottom of the sampling cup corresponding to the opening.

[0010] Preferably, the top cover has an opening in the middle and rounded ends, and two sets of slots are provided on both sides of the middle of the top cover;

[0011] The top cover has a groove near the inside of the sampling cup at one of its arc-shaped ends, and the top of the other arc-shaped end of the top cover also has a groove.

[0012] Preferably, the dustproof flip cover includes a first flip plate, a second flip plate, and a pin, with the first flip plate and the second flip plate respectively rotatably installed on the two arc-shaped sides of the top cover;

[0013] The first and second flaps are fixedly installed with the same number of pins at the slots on both sides of the upper cover, and the first and second flaps are rotatably installed inside the dustproof flap through the pins.

[0014] Preferably, the first flap has a slot at the groove near the inside of the sampling cup on the corresponding upper cover, and the second flap has a slot at the groove at the top of the corresponding upper cover.

[0015] The first and second flaps are connected in a stepped manner.

[0016] Preferably, the dustproof flip cover also includes a first base, a second base, and a connecting arm. The first base is fixedly installed on the top of the first flip plate, and the second base is fixedly installed on the top of the second flip plate.

[0017] The height of the first base in the first flip plate is longer than that of the second base, and a connecting arm is hinged between the first base and the second base.

[0018] The connecting arm is arc-shaped.

[0019] Preferably, the adsorption structure includes a counterweight base, a sliding sleeve, and a sealing suction cup. The counterweight base is fixedly installed on the side of the sampling cup near the opening, and the counterweight base is cross-shaped.

[0020] A sliding sleeve is fixedly installed in the middle of the counterweight base, and a sealing suction cup is sleeved on the bottom end of the sliding sleeve;

[0021] The size of the sealing suction cup is larger than the opening at the bottom of the sampling cup.

[0022] This utility model has at least the following beneficial effects:

[0023] With strong sample protection and cleanliness, the device is suitable for sampling needs in multiple scenarios: The "double sealing" design of the dustproof flip cover can effectively isolate external dust and moisture, ensuring that the sample is not contaminated before and after sampling. It is especially suitable for sampling scenarios with high requirements for idleness, transportation and cleanliness. At the same time, the dustproof flip cover can be opened and closed from both sides. Combined with the hanging ring on the top of the sampling cup and the sampling rope, it can flexibly sample in narrow containers and maintain the vertical posture of the sampling cup through the cross-shaped counterweight base, avoiding the sampling operation affected by the depth and space of the container. It is suitable for a variety of liquid storage containers.

[0024] This utility model also has the following beneficial effects:

[0025] Highly efficient liquid inlet and reliable sealing after sampling, with outstanding ease of operation: During sampling, liquid can enter bidirectionally through the opening in the middle of the top cover and the opening at the bottom of the sampling cup. The air tube balances the air pressure inside and outside the cup, reducing resistance to liquid inflow, preventing liquid splashing, and ensuring sufficient sample volume. After sampling, the sealing suction cup returns to its original position along the sliding sleeve due to the decrease in liquid pressure. The size of the suction cup, which is larger than the bottom opening, achieves a reliable seal. At the same time, the dustproof flip cover can be closed and protected by operating it in reverse. The double sealing design prevents sample leakage. The entire process does not require complicated tools. Sampling can be completed simply by lowering / pulling the sampling rope and operating the flip cover base. The independent design of the flip plate facilitates maintenance, greatly reducing the difficulty of operation and maintenance costs. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the unfolded structure of the dustproof flip cover of this utility model;

[0029] Figure 3 This is a schematic diagram of the upper cover structure of this utility model;

[0030] Figure 4 This is a schematic diagram of the disassembled structure of the dustproof flip cover of this utility model;

[0031] Figure 5 This is a three-dimensional sectional view of the present invention.

[0032] In the diagram: 1. Sampling cup; 2. Top cover; 3. Dustproof flip cover; 4. Hanging ring; 5. Vent pipe; 6. First flip plate; 7. Second flip plate; 8. First base; 9. Second base; 10. Connecting arm; 11. Pin; 12. Counterweight base; 13. Sliding sleeve; 14. Sealing suction cup. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] Reference Figure 1-5 A user-friendly liquid sampling device includes a sampling cup 1, with a set of hanging rings 4 fixedly installed on both sides near the top of the sampling cup 1, and a vent pipe 5 fixedly connected to the side of the sampling cup 1 near the bottom, the vent pipe 5 communicating with the interior of the sampling cup 1. The device also includes:

[0035] The top of the sampling cup 1 is fixedly installed with a top cover 2, and the top of the top cover 2 is movably installed with a dustproof flip cover 3;

[0036] The bottom of the sampling cup 1 is provided with an opening, and an adsorption structure is installed at the bottom of the sampling cup 1 corresponding to the opening.

[0037] Furthermore, the top cover 2 has an opening in the middle and rounded ends, and two sets of slots are respectively provided on both sides of the middle of the top cover 2.

[0038] The upper cover 2 has a groove at one end near the inside of the sampling cup 1, and the other end of the upper cover 2 also has a groove at the top. The opening in the middle of the upper cover 2 can be directly used as the liquid inlet. Combined with the rounded shape at both ends, it can reduce the resistance when the liquid flows in and avoid the liquid splashing due to impact. At the same time, the rounded edge can reduce the risk of hand scratches during operation and improve the safety of use. The slots on both sides provide positioning for the rotation installation of the dustproof flip cover 3, ensuring the assembly stability of the dustproof flip cover 3 and the upper cover 2, preventing the flip cover from shifting or loosening during sampling, and ensuring the reliability of the opening and closing function. The slots at both ends provide the movement space for the rotation of the first flip plate 6 and the second flip plate 7, so that the flip plate can smoothly fit the rounded contour of the upper cover 2 to open and close. It does not occupy extra space and ensures the sealing between the flip plate and the upper cover 2 when the flip plate is closed, preventing external dust and impurities from entering the sampling cup 1 through the gaps and contaminating the sample.

[0039] Furthermore, the dustproof flip cover 3 includes a first flip plate 6, a second flip plate 7 and a pin 11. The first flip plate 6 and the second flip plate 7 are respectively rotatably installed on the two sets of arc-shaped sides of the upper cover 2.

[0040] The first flap 6 and the second flap 7 are fixedly installed with the same number of pins 11 at the slots on both sides of the upper cover 2. The first flap 6 and the second flap 7 are rotatably installed inside the dustproof flap 3 through the pins 11, thus splitting the dustproof flap 3 into two independent flaps, which are rotatably installed through the slots on the upper cover 2 through the pins 11. This allows the flap to be opened and closed from both sides. Compared with the one-piece flap, the operation is more flexible. When sampling, it is possible to choose to open it from one side or both sides according to the liquid level and the size of the sampling environment, especially in narrow containers. When sampling from within, the entire flip cover can be opened completely due to space limitations. The engagement structure between the pin 11 and the slot ensures the coaxiality of the first flip plate 6 and the second flip plate 7 when they rotate, reducing flip plate wobbling. At the same time, the fixed installation method of the pin 11 can improve the load-bearing capacity of the flip cover and prevent the flip plates from falling off due to long-term use or liquid impact. The independent design of the two flip plates facilitates individual maintenance. If one flip plate is worn or deformed, only the corresponding flip plate needs to be replaced, without the need to replace the entire dust cover 3, thus reducing maintenance costs.

[0041] Furthermore, the first flap 6 has a slot at the opening near the inside of the sampling cup 1 on the corresponding upper cover 2, and the second flap 7 has a slot at the opening at the top of the corresponding upper cover 2.

[0042] The first flap 6 and the second flap 7 are connected in a stepped engagement. The first flap 6 has a slot inside the upper cover 2, and the second flap 7 has a slot at the top of the upper cover 2. The slots can fit against the edge of the slots in the upper cover 2 to form a "double-seal contact". This prevents dust and moisture from entering the sampling cup 1 through the gap between the flap and the upper cover 2. Especially when the device is not in use or during transportation, it can protect the cleanliness of the inside of the sampling cup 1. The stepped engagement design at the connection of the two flaps ensures that the flaps are seamlessly connected when closed. This prevents liquid from seeping in or out from the gap between the two flaps and also prevents the flaps from deforming due to mutual squeezing, thus extending the service life of the flaps. At the same time, the stepped structure can help with positioning, ensuring that the two flaps are aligned every time they are closed, improving the ease of operation.

[0043] Furthermore, the dustproof flip cover 3 also includes a first base 8, a second base 9 and a connecting arm 10. The first base 8 is fixedly installed on the top of the first flip plate 6, and the second base 9 is fixedly installed on the top of the second flip plate 7.

[0044] The height of the first base 8 in the first flip plate 6 is longer than that of the second base 9, and a connecting arm 10 is hinged between the first base 8 and the second base 9.

[0045] The connecting arm 10 is arc-shaped, and the design of the first base 8 being longer than the second base 9, combined with the hinged installation of the arc-shaped connecting arm 10, allows the two bases to adapt to the rotation angle of the flip plate through the arc trajectory of the connecting arm 10 when driving the flip plate to rotate. This ensures that the first flip plate 6 and the second flip plate 7 open and close synchronously, avoiding sample stratification caused by the flip plate opening or closing first on one side. Compared with straight rod connections, the arc-shaped connecting arm 10 reduces jamming during rotation, making the flip plate open and close more smoothly. At the same time, the arc structure can distribute the force, preventing the connection part from breaking due to long-term rotation, thus improving the durability of the device. The presence of the connecting arm 10 can limit the maximum opening and closing angle of the flip plate, preventing excessive rotation of the flip plate from causing excessive force on the pin 11 and further ensuring the safety of the device.

[0046] Furthermore, the adsorption structure includes a counterweight base 12, a sliding sleeve 13, and a sealing suction cup 14. The counterweight base 12 is fixedly installed on one side of the sampling cup 1 near the opening, and the counterweight base 12 is in the shape of a cross.

[0047] A sliding sleeve 13 is fixedly installed in the middle of the counterweight base 12, and a sealing suction cup 14 is sleeved on the bottom end of the sliding sleeve 13.

[0048] The size of the sealing suction cup 14 is larger than the opening at the bottom of the sampling cup 1. The cross-shaped counterweight base 12 is fixed inside the bottom opening of the sampling cup 1. The cross structure ensures uniform counterweight, keeping the cup mouth facing downwards when the sampling cup 1 falls into the liquid, avoiding tilting of the sample due to the shift of the center of gravity, and reducing obstruction to the flow of liquid. Combined with the bottom opening of the sampling cup 1, it ensures that the liquid can enter smoothly from the bottom. The sleeve 13 and the sealing suction cup 14 are connected, allowing the height of the sealing suction cup 14 to be flexibly adjusted to meet the sampling needs of different depths. At the same time, the sleeve 13 can limit the lateral displacement of the sealing suction cup 14, ensuring the positioning of the suction cup during adsorption. The size of the sealing suction cup 14 is larger than the bottom opening of the sampling cup 1, so it can completely cover the edge of the opening during adsorption, forming a reliable seal.

[0049] In summary:

[0050] Before sampling, the dustproof flip cover 3 is in a closed state: the first flip plate 6 and the second flip plate 7 are engaged by a stepped structure at the connection point. The slot of the first flip plate 6 fits against the groove edge of the upper cover 2 near the inside of the sampling cup 1, and the slot of the second flip plate 7 fits against the groove edge at the top of the upper cover 2, forming a "double sealing contact". At the same time, the pin 11 is engaged in the slot of the upper cover 2, ensuring that the dustproof flip cover 3 and the upper cover 2 are stably assembled, preventing dust and impurities from entering the inside of the sampling cup 1, and achieving the cleaning and protection of the sampling cup 1. Then, the sampling rope is hung on the hanging rings 4 on both sides of the top of the sampling cup 1 to complete the pre-fixation of the device and the sampling rope. During sampling, the sampling rope is lowered, causing the hanging ring 4 to move downwards synchronously, thereby pulling the sampling cup 1 into the liquid. During this process, the cross-shaped counterweight base 12 at the bottom of the sampling cup 1 maintains a vertical posture due to its uniform weight distribution, preventing the sampling cup 1 from tilting due to a shift in the center of gravity. This ensures that the sampling cup 1 always moves downwards in a stable state with its opening facing down. As the sampling cup 1 continues to move downwards into the liquid, the liquid exerts pressure on the sealing suction cup 14, pushing it upwards along the sliding sleeve 13, gradually opening the opening at the bottom of the sampling cup 1. Simultaneously, the air inside the sampling cup 1... Gas is released outward through the vent pipe 5 on one side of the bottom of the surface, balancing the air pressure inside and outside the sampling cup 1 and preventing the liquid from flowing in due to the air pressure inside the cup. At this time, the liquid flows in from both the opening at the bottom of the sampling cup 1 and the opening in the middle of the top cover 2, achieving bidirectional liquid inlet and ensuring sufficient sampling volume. After sampling, the sampling rope is pulled upward, causing the hanging ring 4 to move upward synchronously with the sampling cup 1. During this process, the pressure of the liquid on the sealing suction cup 14 gradually decreases, and the sealing suction cup 14 returns to its original position along the sliding sleeve 13. Because the size of the sealing suction cup 14 is larger than the opening at the bottom of the sampling cup 1, it can completely cover the bottom after returning to its original position. The opening edge seals the bottom opening of the sampling cup 1 to prevent sample leakage. At the same time, the first base 8 or the second base 9 of the dustproof flip cover 3 can be operated in reverse. With the design of the first base 8 being longer than the second base 9 and the hinge transmission of the arc-shaped connecting arm 10, the connecting arm 10 is driven to rotate along the arc-shaped trajectory, thereby pulling the first flip plate 6 and the second flip plate 7 to rotate in the opposite direction around the pin 11. This allows the two flip plates to re-engage through the stepped structure and the slot to fit against the groove edge of the upper cover 2, thus closing the dustproof flip cover 3. This prevents external impurities from contaminating the sample during the lifting process, and finally completes the sampling and obtains a sealed and clean liquid sample.

[0051] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid sampling device that is easy to operate, comprising a sampling cup (1), wherein a set of hanging rings (4) are fixedly installed on both sides near the top of the sampling cup (1), and a vent pipe (5) is fixedly connected to the side of the sampling cup (1) near the bottom, and the vent pipe (5) communicates with the interior of the sampling cup (1), characterized in that, Also includes: The top of the sampling cup (1) is fixedly installed with a top cover (2), and the top of the top cover (2) is movably installed with a dustproof flip cover (3); The sampling cup (1) has an opening at its bottom end, and an adsorption structure is installed at the bottom end of the sampling cup (1) corresponding to the opening.

2. The easy-to-operate liquid sampling device according to claim 1, characterized in that, The upper cover (2) has an opening in the middle and rounded ends, and two sets of slots are respectively provided on both sides of the middle of the upper cover (2); The upper cover (2) has a groove at one end near the inside of the sampling cup (1), and the other end of the upper cover (2) also has a groove at the top of the arc shape.

3. The easy-to-operate liquid sampling device according to claim 1, characterized in that, The dustproof flip cover (3) includes a first flip plate (6), a second flip plate (7) and a pin (11). The first flip plate (6) and the second flip plate (7) are rotatably installed on the two arc-shaped sides of the upper cover (2). The first flap (6) and the second flap (7) are fixedly installed with the same number of pins (11) at the slots on both sides of the upper cover (2), and the first flap (6) and the second flap (7) are rotatably installed inside the dustproof flap (3) through the pins (11).

4. The easy-to-operate liquid sampling device according to claim 3, characterized in that, The first flip plate (6) has a slot at the corresponding top cover (2) near the inside of the sampling cup (1), and the second flip plate (7) has a slot at the corresponding top of the top cover (2). The first flap (6) and the second flap (7) are engaged together in a stepped manner at the connection point.

5. The easy-to-operate liquid sampling device according to claim 4, characterized in that, The dustproof flip cover (3) also includes a first base (8), a second base (9) and a connecting arm (10). The first base (8) is fixedly installed on the top of the first flip plate (6), and the second base (9) is fixedly installed on the top of the second flip plate (7). The height of the first base (8) in the first flip plate (6) is longer than that of the second base (9), and a connecting arm (10) is hinged between the first base (8) and the second base (9); The connecting arm (10) is arc-shaped.

6. The easy-to-operate liquid sampling device according to claim 1, characterized in that, The adsorption structure includes a counterweight base (12), a sliding sleeve (13), and a sealing suction cup (14). The counterweight base (12) is fixedly installed on one side of the sampling cup (1) near the opening, and the counterweight base (12) is cross-shaped. A sliding sleeve (13) is fixedly installed in the middle of the counterweight base (12), and a sealing suction cup (14) is sleeved at the bottom end of the sliding sleeve (13). The size of the sealing suction cup (14) is larger than the opening at the bottom of the sampling cup (1).

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