Liquid sampling and metering detection device and detection method thereof

Abstract

The invention relates to the technical field of liquid sampling, in particular to a liquid sampling metering detection device and a detection method thereof. The device comprises a supporting plate fixed to the inner side of a bearing ring and a collecting cylinder fixed to the inner side of the supporting plate, a U-shaped support is fixed to the two ends of the top of the supporting plate, an auxiliary mechanism is assembled between the collecting cylinder and the U-shaped support, and the auxiliary mechanism comprises a U-shaped pulling and connecting rod, a force application rack, a force guiding gear, a shaft rod and a transmission part. Through the structural design of the auxiliary mechanism, the observation mechanism and the positioning mechanism, the device is convenient to sample liquid, and meanwhile, the liquid in the collection cylinder can be shunted into the sampling bottle, so that the amount of the liquid discharged after sampling by the sampling bottle is not influenced by liquid hanging beads or liquid overflow at the end part of the collection cylinder, and the working efficiency is improved; the efficiency and accuracy of the device are improved, and through implementation of the detection method, the accuracy and stability of sampling and metering are improved, personal errors are reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid sampling, and in particular to a liquid sampling metering and detection device and a detection method thereof. Background Art

[0002] As a key technology, liquid detection occupies a pivotal position in many fields, and its importance is self-evident. In the field of environmental protection, liquid detection is a key means to monitor water quality safety, assess the degree of water pollution and track pollution sources. It plays a vital role in protecting water resources, maintaining ecological balance and formulating effective environmental governance strategies. Through accurate detection of various pollutants, nutrients, heavy metals and microorganisms in water bodies, potential environmental risks can be discovered and responded to in a timely manner to ensure the health of humans and ecosystems.

[0003] In the field of food safety, liquid testing also plays a vital role. Whether it is drinking water, beverages or various liquid foods, their quality and safety are directly related to the health of consumers. Through liquid testing technology, harmful substances in food, such as bacteria, viruses, pesticide residues, excessive additives, etc., can be efficiently screened out, thereby ensuring the safety of the food supply chain and enhancing the public's confidence in food safety. In addition, this technology can also help food production companies improve their product quality control level and promote the healthy development of the food industry.

[0004] In the chemical industry, liquid detection is an indispensable part. The chemical production process involves a large number of liquid raw materials, intermediates and final products, whose composition is complex and changeable, and the requirements for detection technology are extremely high. Through advanced liquid detection technology, accurate analysis of chemical liquid products can be achieved to ensure that the products meet quality standards and safety regulations. At the same time, this technology can also help optimize production processes, improve production efficiency, reduce production costs, and promote the transformation, upgrading and sustainable development of the chemical industry.

[0005] Liquid detection plays an irreplaceable role in many fields such as environment, food, and chemical industry, and its importance is becoming increasingly prominent with the continuous development and progress of society. Before conducting liquid detection, a crucial step is to accurately sample the target object. This process not only requires the operator to have professional knowledge and skills, but also requires the use of a liquid sampling and metering detection device to take samples. In the current existing technology, after the sampling tube absorbs the liquid, although it can be temporarily stored in the sampling tube under the limitation of pressure, there will be liquid beads or liquid overflow at the bottom of the sampling tube, resulting in the sampling tube After the liquid is pipetted, the amount of liquid sampled will be greater than the displayed scale. There is room for improvement. For this reason, we propose a liquid sampling and metering detection device and a detection method thereof. Summary of the invention

[0006] The object of the present invention is to provide a liquid sampling and metering detection device and a detection method thereof to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A liquid sampling, metering and detection device comprises a support plate fixed on the inner side of a receiving ring, and a collecting tube fixed on the inner side of the support plate, wherein a U-shaped bracket is fixed at both ends of the top of the support plate, and an auxiliary mechanism is assembled between the collecting tube and the U-shaped bracket, and the auxiliary mechanism comprises a U-shaped pulling rod, a force rack, a force guide gear, an axle rod and a transmission member, the top of the U-shaped bracket is slidably connected with the U-shaped pulling rod, and both ends of the bottom of the U-shaped pulling rod are fixed with a force rack, one side of the force rack is meshedly connected with the force guide gear, one side of the force guide gear is fixed with a axle rod, and the end of the axle rod away from the force guide gear is rotatably connected with a mounting seat through a bearing, the mounting seat is fixed to the U-shaped bracket, and the outer side of the axle rod is assembled with a transmission member.

[0009] Preferably, the transmission member includes a linear cavity frame, a guide frame, a lifting plate, a piston rod and a piston plate. The outer side of the shaft rod is fixed with a linear cavity frame, the inner side of the linear cavity frame is slidably connected with a guide frame, a lifting plate is fixed to the top of the two guide frames, a piston rod is fixed to the bottom of the lifting plate, the piston rod is slidably connected to the top of the collection tube, the bottom of the piston rod is fixed with a piston plate, and the piston plate is interference fit with the inner side of the collection tube.

[0010] Preferably, the transmission component also includes a shunt tube, a valve and a sampling bottle, a shunt tube is fixed to the outside of the collecting tube, a valve is provided on the top of the shunt tube, a sampling bottle is fixed to the bottom of the shunt tube, and a scale is provided on the outside of the sampling bottle.

[0011] Preferably, a connecting spring is sleeved on the outer side of the U-shaped tie rod and below the U-shaped bracket, a fixing ring is fixed to the bottom of the connecting spring, and the top of the connecting spring is fixed to the U-shaped bracket.

[0012] Preferably, an observation mechanism is installed between the U-shaped tie rod and the U-shaped bracket.

[0013] Preferably, the observation mechanism includes a mounting ring, a side support rod, a scale bar, a pointer and a matching groove. A mounting ring is fixed in the middle of the top of the U-shaped bracket, side support rods are fixed at both ends of the inner side of the mounting ring, a scale bar is fixed between the two side support rods, a pointer is fixed on one side of the U-shaped pull rod, and a matching groove is opened on the inner side of the scale bar, and the matching groove is slidably connected to the pointer.

[0014] Preferably, L-shaped connecting plates are fixed to both ends of the receiving ring, an annular bearing body is fixed to the bottom of the two L-shaped connecting plates, and a positioning mechanism is installed on the inner side of the annular bearing body.

[0015] Preferably, the positioning mechanism includes an upper hollow disk, a linear groove, a force-guiding cylinder, an anti-slip plate, a lower hollow disk, a transmission rib, a bidirectional screw and a middle fixed hollow disk. The top of the annular carrier is rotatably connected to the upper hollow disk, and the bottom of the annular carrier is rotatably connected to the lower hollow disk. The tops of the upper hollow disk and the lower hollow disk are both provided with linear grooves, the inner sides of the linear grooves are slidably connected to force-guiding cylinders, the bottoms of the force-guiding cylinders are fixed with anti-slip plates, a middle fixed hollow disk is fixed to the middle part of the inner side of the annular carrier, the anti-slip plates are slidably connected to the middle fixed hollow disk, the sides of the upper hollow disk and the lower hollow disk that are away from each other are rotatably connected to the transmission ribs through pins, a bidirectional screw is threadedly connected between the two transmission ribs, and the two ends of the bidirectional screw have opposite thread rotation directions.

[0016] A liquid sampling metering detection method is applicable to a liquid sampling metering detection device, comprising the following steps:

[0017] S1: Sampling step, first select a sampling bottle of corresponding specifications, fix the receiving ring on the top of the liquid container through the positioning mechanism, and then the bottom of the collection tube is in contact with the liquid;

[0018] S2: metering step, then press the U-shaped pull rod to collect liquid in the tube and transfer it to the sampling bottle through the shunt tube. After the liquid sampling is completed, the volume or weight of the sampled liquid is accurately measured by the metering module, and the measurement result is transmitted to the control unit connected to the metering module for display and storage;

[0019] S3: a detection step, in which the detection module detects various physical and chemical properties or components of the sampled liquid, and transmits the detection data in real time to a control unit connected to the detection module for processing and display;

[0020] The control unit determines whether the liquid is qualified based on the test results and the preset standard value or range, and outputs the test results to the operator through the display screen.

[0021] It can be seen without a doubt that the above-mentioned technical solution of the present application can definitely solve the technical problem to be solved by the present application.

[0022] At the same time, through the above technical solutions, the present invention has at least the following beneficial effects:

[0023] The present invention facilitates the sampling of liquids through the structural design of the auxiliary mechanism, the observation mechanism and the positioning mechanism, and can simultaneously divert the liquid in the collection tube into the sampling bottle, so that the amount of liquid discharged from the sampling bottle after sampling is not affected by the liquid beads or liquid overflow at the end of the collection tube, thereby speeding up the work efficiency, improving the efficiency and accuracy of the present invention, and through the implementation of the detection method, improving the accuracy and stability of sampling and metering, reducing human errors, and improving the detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 It is a schematic diagram of the connection structure between the collection tube and the support plate of the present invention;

[0027] Figure 3 It is a schematic diagram of the connection structure between the U-shaped bracket and the support plate of the present invention;

[0028] Figure 4 For the present invention Figure 1 The enlarged schematic diagram at A in the middle;

[0029] Figure 5 It is a schematic diagram of the connection structure between the annular carrier and the upper hollow disk of the present invention;

[0030] Figure 6 It is a schematic diagram of the connection structure of the lower hollow disk and the transfer rib plate of the present invention.

[0031] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0032] In the figure: 1. receiving ring; 2. supporting plate; 3. collecting tube; 4. U-shaped bracket; 5. U-shaped pulling rod; 6. force rack; 7. force guiding gear; 8. shaft rod; 9. linear cavity frame; 10. guide frame; 11. lifting plate; 12. piston rod; 13. piston plate; 14. shunt pipe; 15. valve; 16. sampling bottle; 17. fixing ring; 18. connecting spring; 19. mounting ring; 20. side support rod; 21. scale bar; 22. pointer; 23. matching groove; 24. L-shaped connecting plate; 25. annular bearing body; 26. upper hollow disk; 27. linear groove; 28. force guiding cylinder; 29. ​​anti-slip plate; 30. lower hollow disk; 31. transmission rib plate; 32. bidirectional screw; 33. middle fixed hollow disk. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] Example 1

[0035] Reference Figure 1-6 A liquid sampling, metering and detection device comprises a support plate 2 fixed on the inner side of a receiving ring 1, and a collection tube 3 fixed on the inner side of the support plate 2. A U-shaped bracket 4 is fixed at both ends of the top of the support plate 2. An auxiliary mechanism is assembled between the collection tube 3 and the U-shaped bracket 4. The auxiliary mechanism comprises a U-shaped pulling rod 5, a force rack 6, a force guide gear 7, an axle rod 8 and a transmission member. The top of the U-shaped bracket 4 is slidably connected with a U-shaped pulling rod 5, and both ends of the bottom of the U-shaped pulling rod 5 are fixed with a force rack 6, one side of the force rack 6 is meshed with a force guide gear 7, one side of the force guide gear 7 is fixed with axle rod 8, and the end of the axle rod 8 away from the force guide gear 7 is rotatably connected with a mounting seat through a bearing, the mounting seat is fixed to the U-shaped bracket 4, and a transmission member is assembled on the outside of the axle rod 8.

[0036] The transmission parts include a linear cavity frame 9, a guide frame 10, a lifting plate 11, a piston rod 12 and a piston plate 13. The outer side of the shaft rod 8 is fixed with a linear cavity frame 9, and the inner side of the linear cavity frame 9 is slidably connected with a guide frame 10. A lifting plate 11 is fixed on the top of the two guide frames 10, and a piston rod 12 is fixed on the bottom of the lifting plate 11. The piston rod 12 is slidably connected to the top of the collection tube 3, and a piston plate 13 is fixed to the bottom of the piston rod 12. The piston plate 13 is interference fit with the inner side of the collection tube 3. When the piston rod 12 is subjected to vertical tension or pressure, it can drive the piston plate 13 to move inside the collection tube 3.

[0037] The transmission parts also include a shunt tube 14, a valve 15 and a sampling bottle 16. The shunt tube 14 is fixed to the outside of the collection tube 3, the valve 15 is arranged on the top of the shunt tube 14, the sampling bottle 16 is fixed to the bottom of the shunt tube 14, the outside of the sampling bottle 16 is arranged with a scale, the top of the sampling bottle 16 is threadedly connected with a bottle cap, the top of the bottle cap is provided with an air vent, and the bottle cap is threadedly connected to the shunt tube 14.

[0038] A connecting spring 18 is sleeved on the outside of the U-shaped pull rod 5 and at a position below the U-shaped bracket 4. A fixing ring 17 is fixed to the bottom of the connecting spring 18, and the top of the connecting spring 18 is fixed to the U-shaped bracket 4. When the U-shaped pull rod 5 is pressed, the U-shaped pull rod 5 stretches the connecting spring 18 to deform. When the U-shaped pull rod 5 is released, the elastic force generated by the connecting spring 18 pulls the fixing ring 17 to drive the U-shaped pull rod 5 to move and reset.

[0039] An observation mechanism is installed between the U-shaped tie rod 5 and the U-shaped bracket 4. The observation mechanism includes a mounting ring 19, a side support rod 20, a scale bar 21, a pointer 22 and a matching groove 23. A mounting ring 19 is fixed in the middle of the top of the U-shaped bracket 4, and side support rods 20 are fixed at both ends of the inner side of the mounting ring 19. A scale bar 21 is fixed between the two side support rods 20. A pointer 22 is fixed on one side of the U-shaped tie rod 5. A matching groove 23 is provided on the inner side of the scale bar 21. The matching groove 23 is slidably connected with the pointer 22. Through the setting of the matching groove 23, the pointer 22 can be driven to move synchronously when the U-shaped tie rod 5 moves vertically, which is convenient for the operator to observe the vertical movement distance.

[0040] L-shaped connecting plates 24 are fixed to both ends of the receiving ring 1 , an annular bearing body 25 is fixed to the bottom of the two L-shaped connecting plates 24 , and a positioning mechanism is installed inside the annular bearing body 25 .

[0041] The positioning mechanism includes an upper hollow disk 26, a linear groove 27, a force-guiding cylinder 28, an anti-slip plate 29, a lower hollow disk 30, a transmission rib 31, a bidirectional screw 32 and a middle fixed hollow disk 33. The top of the annular carrier 25 is rotatably connected to the upper hollow disk 26, and the bottom of the annular carrier 25 is rotatably connected to the lower hollow disk 30. The tops of the upper hollow disk 26 and the lower hollow disk 30 are both provided with linear grooves 27, and the inner sides of the linear grooves 27 are both slidably connected to the force-guiding cylinders 28. The bottoms of the force-guiding cylinders 28 are fixed with anti-slip plates 29. The inner sides of the annular carrier 25 are A middle fixed hollow disk 33 is fixed in the middle, and the anti-slip plates 29 are slidably connected to the middle fixed hollow disk 33. The upper hollow disk 26 and the lower hollow disk 30 are rotatably connected to the transfer ribs 31 on the sides away from each other through pins. A bidirectional screw 32 is threadedly connected between the two transfer ribs 31. The threads at both ends of the bidirectional screw 32 are rotated in opposite directions. By rotating and adjusting the bidirectional screw 32, the anti-slip plates 29 on the upper hollow disk 26 and the lower hollow disk 30 can be adapted to liquid containers of different shapes, so that the receiving ring 1 can be quickly fixed to the top of the liquid container.

[0042] Example 2

[0043] A liquid sampling metering detection method is applicable to a liquid sampling metering detection device, comprising the following steps:

[0044] S1: Sampling step, first select a sampling bottle 16 of corresponding specifications, fix the receiving ring 1 on the top of the liquid container through the positioning mechanism, and then the bottom of the collection tube 3 is in contact with the liquid;

[0045] The receiving ring 1 is accurately fixed on the top of the liquid container by the positioning mechanism to ensure the accuracy of the sampling position, thereby improving the accuracy and repeatability of the sampling and reducing human errors.

[0046] Automatic sampling of liquids can be achieved through a simple pressing operation, without the need for complicated operating steps or professional operating skills, which reduces the difficulty of sampling and improves work efficiency.

[0047] After sampling is completed, the volume or weight of the sampled liquid is accurately measured through the integrated metering module, and the measurement results are transmitted to the control unit in real time for display and storage, ensuring the accuracy and traceability of the metering results.

[0048] S2: Measuring step, then pressing the U-shaped pull rod 5, so that the liquid in the collection tube 3 is transferred to the sampling bottle 16 through the shunt tube 14. After the liquid sampling is completed, the volume or weight of the sampled liquid is accurately measured by the metering module, and the measurement result is transmitted to the control unit connected to the metering module for display and storage;

[0049] S3: Detection step, the detection module detects multiple physical and chemical properties or components of the sampled liquid, and transmits the detection data in real time to the control unit connected to the detection module for processing and display; the detection module can automatically detect multiple physical and chemical properties or components of the sampled liquid, expanding the detection range and improving the comprehensiveness and accuracy of the detection. At the same time, the detection data is transmitted to the control unit in real time for processing and display, so that the operator can understand the test results in time and make corresponding judgments.

[0050] The control unit determines whether the liquid is qualified based on the test results and the preset standard value or range, and outputs the test results to the operator through the display screen. It is suitable for a variety of liquid sampling, metering and detection scenarios. It only needs to replace the sampler of the corresponding specifications and adjust the preset parameters. It has strong versatility and flexibility. The control unit is not only responsible for receiving and displaying data, but also can automatically determine whether the liquid is qualified according to the preset standard value or range, and present the test results intuitively to the operator through the display screen, realizing the intelligence and automation of the detection process.

[0051] From the above, we can know that:

[0052] The present invention is directed to the technical problem that liquid detection plays an irreplaceable role in multiple fields such as environment, food, and chemical industry, and its importance is becoming increasingly prominent with the continuous development and progress of society. Before conducting liquid detection, a crucial step is to accurately sample the target detection object. This process not only requires the operator to have professional knowledge and skills, but also requires the use of a liquid sampling and metering detection device to take samples. In the current prior art, after the sampling tube absorbs the liquid, although it can be temporarily stored in the sampling tube under the limitation of pressure, there will be liquid beads or liquid overflow at the bottom of the sampling tube, resulting in the sampling tube After the liquid is pipetted, the amount of liquid sampled will be greater than the displayed scale, and there is room for improvement; the technical solutions of the above embodiments are adopted. At the same time, the implementation process of the above technical solution is:

[0053] During use, the upper hollow disk 26, the lower hollow disk 30 and the middle fixed hollow disk 33 are first sleeved on the outside of the liquid container. At this time, the bottom of the collection tube 3 is inserted into the liquid, and then the bidirectional screw 32 is rotated. Because the bidirectional screw 32 is threadedly connected with the transfer rib 31, the threads at both ends of the bidirectional screw 32 are rotated in opposite directions, and the upper hollow disk 26, the lower hollow disk 30 and the transfer rib 31 are rotatably connected by pins, the linear groove 27 and the force guiding cylinder 28 are slidably connected, the force guiding cylinder 28 is fixed with the anti-slip plate 29, and the anti-slip plate 29 is slidably connected with the middle fixed hollow disk 33, so that the upper hollow disk 26 and the lower hollow disk 30 can rotate relative to each other, so that the force guiding cylinder 28 is pushed by the linear groove 27, and the liquid container is clamped and fixed by multiple anti-slip plates 29, so that the positioning of the receiving ring 1 can be achieved;

[0054] Then, the U-shaped pull rod 5 is pressed according to the preset scale number, and the U-shaped pull rod 5 rotates by meshing the force rack 6 with the guide gear 7, so that the guide gear 7 drives the shaft rod 8 and the linear chamber frame 9 to rotate synchronously. Because the linear chamber frame 9 is slidably connected to the guide frame 10, and the guide frame 10 is fixed to the lifting plate 11, the lifting plate 11 can drive the piston rod 12 and the piston plate 13 upward, so that the liquid is pressed into the collection tube 3. When the piston plate 13 moves to above the shunt tube 14, the liquid flows into the sampling bottle 16 through the shunt tube 14 for sampling.

[0055] Through the above configuration, the present application can certainly solve the above technical problems and achieve the following technical effects:

[0056] The present invention facilitates the sampling of liquids by means of the structural design of the auxiliary mechanism, the observation mechanism and the positioning mechanism, and can simultaneously divert the liquid in the collection tube 3 to the sampling bottle 16, so that the amount of liquid discharged from the sampling bottle 16 after sampling is not affected by the liquid beads or liquid overflow at the end of the collection tube 3, thereby speeding up the working efficiency, improving the efficiency and accuracy of the present invention, and through the implementation of the detection method, improving the accuracy and stability of the sampling measurement, reducing human errors, and improving the detection efficiency.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A liquid sampling and measuring detection device, characterized in that: The invention comprises a support plate (2) fixed on the inner side of a receiving ring (1), and a collection tube (3) fixed on the inner side of the support plate (2); a U-shaped bracket (4) is fixed at both ends of the top of the support plate (2); an auxiliary mechanism is arranged between the collection tube (3) and the U-shaped bracket (4); the auxiliary mechanism comprises a U-shaped pull-connecting rod (5), a force-applying rack (6), a force-guiding gear (7), an axle rod (8) and a transmission member; the top of the U-shaped bracket (4) is slidably connected with the U-shaped pull-connecting rod (5); both ends of the bottom of the U-shaped pull-connecting rod (5) are fixed with a force-applying rack (6); one side of the force-applying rack (6) is meshingly connected with the force-guiding gear (7); one side of the force-guiding gear (7) is fixed with axle rod (8); one end of the axle rod (8) away from the force-guiding gear (7) is rotatably connected with a mounting seat through a bearing; the mounting seat is fixed to the U-shaped bracket (4); and a transmission member is arranged on the outer side of the axle rod (8).

2. A liquid sampling and measuring detection device according to claim 1, characterized in that: The transmission member comprises a linear cavity frame (9), a guide frame (10), a lifting plate (11), a piston rod (12) and a piston sheet (13); the outer side of the shaft rod (8) is fixed with a linear cavity frame (9); the inner side of the linear cavity frame (9) is slidably connected with a guide frame (10); a lifting plate (11) is fixed on the top of the two guide frames (10); the bottom of the lifting plate (11) is fixed with a piston rod (12); the piston rod (12) is slidably connected with the top of the collection tube (3); the bottom of the piston rod (12) is fixed with a piston sheet (13); the piston sheet (13) is interference fit with the inner side of the collection tube (3).

3. A liquid sampling and measuring detection device according to claim 2, characterized in that: The transmission member further comprises a shunt tube (14), a valve (15) and a sampling bottle (16); the shunt tube (14) is fixed to the outside of the collection tube (3); the top of the shunt tube (14) is provided with a valve (15); the bottom of the shunt tube (14) is fixed with a sampling bottle (16); and the outside of the sampling bottle (16) is provided with a scale.

4. A liquid sampling and measuring detection device according to claim 3, characterized in that: A connecting spring (18) is sleeved on the outer side of the U-shaped tie rod (5) and located below the U-shaped bracket (4), a fixing ring (17) is fixed to the bottom of the connecting spring (18), and the top of the connecting spring (18) is fixed to the U-shaped bracket (4).

5. A liquid sampling and measuring detection device according to claim 1, characterized in that: An observation mechanism is installed between the U-shaped tie rod (5) and the U-shaped bracket (4).

6. A liquid sampling and measuring detection device according to claim 5, characterized in that: The observation mechanism comprises a mounting ring (19), a side support rod (20), a scale bar (21), a pointer (22) and a matching groove (23); a mounting ring (19) is fixed in the middle of the top of the U-shaped bracket (4); side support rods (20) are fixed at both ends of the inner side of the mounting ring (19); a scale bar (21) is fixed between the two side support rods (20); a pointer (22) is fixed on one side of the U-shaped pull rod (5); a matching groove (23) is provided on the inner side of the scale bar (21); and the matching groove (23) is slidably connected to the pointer (22).

7. A liquid sampling and measuring detection device according to claim 1, characterized in that: L-shaped connecting plates (24) are fixed at both ends of the receiving ring (1), an annular bearing body (25) is fixed at the bottom of the two L-shaped connecting plates (24), and a positioning mechanism is installed inside the annular bearing body (25).

8. A liquid sampling and measuring detection device according to claim 7, characterized in that: The positioning mechanism comprises an upper hollow disk (26), a linear groove (27), a force-guiding cylinder (28), an anti-slip plate (29), a lower hollow disk (30), a transmission rib plate (31), a bidirectional screw (32) and a middle fixed hollow disk (33); the top of the annular carrier (25) is rotatably connected to the upper hollow disk (26); the bottom of the annular carrier (25) is rotatably connected to the lower hollow disk (30); the tops of the upper hollow disk (26) and the lower hollow disk (30) are both provided with linear grooves (27); the inner sides of the linear grooves (27) are both slidable. A force-guiding cylinder (28) is dynamically connected, and an anti-slip plate (29) is fixed to the bottom of the force-guiding cylinder (28). A middle fixed hollow disk (33) is fixed to the middle of the inner side of the annular carrier (25), and the anti-slip plate (29) is slidably connected to the middle fixed hollow disk (33). The upper hollow disk (26) and the lower hollow disk (30) are rotatably connected to a transmission rib (31) via a pin on the side away from each other. A bidirectional screw (32) is threadedly connected between the two transmission ribs (31), and the two ends of the bidirectional screw (32) have opposite thread rotation directions.

9. A liquid sampling and measuring detection method, applicable to a liquid sampling and measuring detection device according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1: Sampling step, first select a sampling bottle (16) of corresponding specifications, fix the receiving ring (1) on the top of the liquid container through the positioning mechanism, and then the bottom of the collection tube (3) is in contact with the liquid; S2: a metering step, in which the U-shaped pull rod (5) is pressed to collect the liquid in the collection tube (3) and transfer it to the sampling bottle (16) through the shunt tube (14). After the liquid sampling is completed, the volume or weight of the sampled liquid is accurately measured by the metering module, and the measurement result is transmitted to a control unit connected to the metering module for display and storage; S3: a detection step, in which the detection module detects various physical and chemical properties or components of the sampled liquid, and transmits the detection data in real time to a control unit connected to the detection module for processing and display; The control unit determines whether the liquid is qualified based on the test results and the preset standard value or range, and outputs the test results to the operator through the display screen.

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