Automatic sample injection control valve

Abstract

The utility model relates to the technical field of human body breath detection, and discloses an automatic sample injection control valve which comprises a valve body and a protective cap, a clamping connector is arranged at one end of the valve body, the protective cap is arranged on the clamping connector in a sleeved mode, the other end of the valve body is fixedly connected with a first valve element, a second valve element is arranged on the side wall of the first valve element, and the second valve element is fixedly connected with the protective cap. A first channel is formed in the first valve element, a second channel is formed in the second valve element, an output connector is arranged at the other end of the first valve element, a second nut is installed at the output connector, an annular groove is formed between the second nut and the output connector, and a rubber ring is installed in the annular groove. The device is simple in structure, high in precision and low in maintenance cost.

Description

Technical Field

[0001] The utility model relates to the technical field of human breath detection, and particularly relates to an automatic sampling control valve. Background Art

[0002] In the fields of clinical medicine, health monitoring, environmental science, etc., human breath detection has become an important non-invasive diagnostic method. By analyzing the components of the exhaled gas of the human body, information on various aspects such as the individual's metabolic state, disease markers, and environmental pollution exposure can be obtained. However, most traditional human breath detection methods rely on manual operation, which is not only time-consuming and laborious, but also easily affected by human factors, resulting in poor accuracy and reproducibility of the detection results; in order to overcome the above disadvantages, automatic sampling systems have gradually been introduced into the field of human breath detection. The automatic sampling system realizes the automatic collection, sampling, and analysis of gas samples through precise mechanical structures and electronic control units, greatly improving the detection efficiency and accuracy. However, in the automatic sampling system, as one of the key components, the performance of the sampling control valve directly affects the stability of the entire system and the reliability of the detection results.

[0003] For example, Chinese Patent Application No.: CN202210495888.5 discloses a flow control valve for regulating the exhalation flow rate of a subject, including a valve sleeve and a valve core. The valve sleeve has a sleeve structure, on which a fluid inlet and a fluid outlet are provided, and a baffle is provided on the inner wall along the radial direction. The baffle is located between the fluid inlet and the fluid outlet, and a through throttle hole is provided on the baffle; the valve core has a rod-shaped structure, including a first throttle part and a second throttle part. The first throttle part and the second throttle part have coaxial frustum structures. When the first throttle part is moved in the throttle hole, the subject is guided to exhale at a pressure of 5 cm H2O to 20 cm H2O, and the exhalation flow rate of the subject can be adjusted to 180 to 220 mL / s; when the second throttle part is moved in the throttle hole, the subject is guided to exhale at a pressure of 5 cm H2O to 20 cm H2O, and the exhalation flow rate of the subject can be adjusted to 45 to 55 mL / s. This regulating valve has a complex structure, high maintenance costs; poor sealing performance, easy to cause gas leakage; and low intelligence level, making it difficult to achieve seamless docking with other detection devices. Summary of the Utility Model

[0004] (I) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides an automatic sampling control valve, which has the advantages of realizing automatic control of the sampling process through optimized design, improving work efficiency and precision, and reducing maintenance costs at the same time, and solves the problems that the existing sampling control valves often have complex structures, cumbersome operations, and are difficult to achieve precise automatic control, affecting work efficiency and experimental precision.

[0006] (2) Technical Solution

[0007] To achieve the above object of realizing the automatic control of the sample injection process through optimized design, improving work efficiency and precision, and reducing maintenance costs at the same time, the present utility model provides the following technical solution: An automatic sample injection control valve, comprising a valve body and a protective cap. One end of the valve body is provided with a clamping joint, and the protective cap is sleeved on the clamping joint. The other end of the valve body is fixedly connected with a first valve core. A second valve core is arranged on the side wall of the first valve core. A first channel is opened in the first valve core, and a second channel is opened in the second valve core. The other end of the first valve core is provided with an output joint, and a second nut is installed at the output joint. An annular groove is opened between the second nut and the output joint, and a rubber ring is installed in the annular groove.

[0008] Preferably, the protective cap includes a brim and a cap platform arranged on one side of the brim. A through groove for sleeving the clamping joint is opened in the middle of the cap platform.

[0009] Preferably, eight skirt edges are annularly arranged on the side wall of the cap platform, which is convenient for disassembly and installation.

[0010] Preferably, a first nut is arranged on the first valve core near the protective cap end.

[0011] Preferably, a groove is opened on the side wall of the first valve core.

[0012] Preferably, a limiting boss is arranged on the second valve core, and a third nut is installed on the side wall of the limiting boss.

[0013] Preferably, an input joint is arranged at the end of the second valve core.

[0014] (3) Beneficial Effects

[0015] Compared with the prior art, the present utility model provides an automatic sample injection control valve, which has the following beneficial effects:

[0016] The structure of the automatic sample injection control valve is simple. Through optimized design, the automatic control of the sample injection process is realized, the work efficiency and precision are improved, and the maintenance cost is reduced at the same time. Description of the Drawings

[0017] Figure 1 is the overall structure schematic diagram of the present utility model;

[0018] Figure 2 is the partial structure schematic diagram of the present utility model;

[0019] Figure 3 is the structure schematic diagram of the protective cap of the present utility model.

[0020] In the figure: 1. Valve body; 11. First nut; 12. Second nut; 13. First channel; 14. First valve core; 15. Card connector; 16. Groove; 17. Output connector; 18. Rubber ring; 2. Second valve core; 21. Limit boss; 22. Input connector; 23. Third nut; 24. Second channel; 3. Protective cap; 31. Cap brim; 32. Cap platform; 33. Through groove. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] As Figures 1 - 3As shown in the figure, an automatic sampling control valve includes a valve body 1 and a protective cap 3. One end of the valve body 1 is provided with a clamping joint 15, and the protective cap 3 is sleeved on the clamping joint 15. The other end of the valve body 1 is fixedly connected with a first valve core 14. A second valve core 2 is arranged on the side wall of the first valve core 14. A first channel 13 is opened in the first valve core 14, and a second channel 24 is opened in the second valve core 2. The other end of the first valve core 14 is provided with an output joint 17. A second nut 12 is installed at the output joint 17. An annular groove is opened between the second nut 12 and the output joint 17, and a rubber ring 18 is installed in the annular groove; The valve body 1 is the main structure of the entire control valve, and the valve body 1 is responsible for carrying and connecting other key components. It must be strong enough to withstand the pressure of the internal fluid and the challenges of the external environment; The clamping joint 15 is arranged at one end of the valve body 1 and is used for connecting with other equipment or pipelines. The design of the clamping joint 15 should ensure the tightness and sealing performance of the connection to prevent fluid leakage; The protective cap 3 is sleeved on the clamping joint 15, and its main function is to protect the clamping joint 15 from external pollution, mechanical damage or corrosion. The existence of the protective cap 3 extends the service life of the valve body 1 and simplifies the maintenance process; The first valve core 14 is fixedly connected to the other end of the valve body 1 and is the core component for controlling fluid flow. By changing the position or state of the first valve core 14, the opening, closing or adjustment of the fluid passage can be achieved; The second valve core 2 is arranged on the side wall of the first valve core 14 and jointly constitutes a complex fluid control mechanism with the first valve core 14. The second channel 24 opened in the second valve core 2 may intersect or be parallel to the first channel 13 in the first valve core 14 to achieve different fluid control functions; The first channel 13 and the second channel 24 are respectively opened inside the first valve core 14 and the second valve core 2 and are used to guide the flow of the fluid. The design of these two channels determines the path and flow rate of the fluid passing through the valve body 1 and is the key to achieving precise control; The output joint 17 is located at the other end of the first valve core 14 and is used to output the controlled fluid to the target equipment or pipeline. The design of the output joint 17 also needs to ensure the tightness and sealing performance of the connection; The second nut 12 is installed on the output joint 17 and is used to fix and seal the connection between the output joint 17 and other components. By tightening or loosening the second nut 12, the position of the output joint 17 can be easily installed, disassembled or adjusted; The rubber ring 18 is installed in the annular groove opened between the second nut 12 and the output joint 17, and this is the key component for achieving sealing. The rubber ring 18 has good elasticity and sealing performance and can closely fit on the contact surface under pressure to prevent fluid leakage. At the same time, the rubber ring 18 also has certain wear resistance and corrosion resistance and can adapt to different working environments and fluid media.

[0023] As Figure 3As shown in the figure, the protective cap 3 includes a brim 31 and a cap base 32 provided on one side of the brim 31. A through groove 33 for sleeving the clamping joint 15 is provided in the middle of the cap base 32; the through groove 33 provided in the middle of the cap base 32 can be accurately sleeved on the clamping joint 15 of the valve body 1 to ensure the stable connection between the protective cap 3 and the valve body 1; the through groove 33 not only provides a sleeving space but also plays a positioning role to prevent the protective cap 3 from shifting or being misaligned during installation; the protective cap 3 can effectively isolate pollutants such as dust and moisture in the external environment, preventing them from contacting the clamping joint 15, thereby keeping the clamping joint 15 clean and dry; during transportation, installation or use, the protective cap 3 can absorb or disperse external impacts and vibrations, preventing the clamping joint 15 from being mechanically damaged; in some designs, a sealing material (such as the rubber ring 18) may be used between the protective cap 3 and the clamping joint 15 for sealing to enhance the sealing performance of the entire valve; through the tight sleeving of the protective cap 3 and the possible sealing design, fluid leakage from the clamping joint 15 can be further prevented.

[0024] As Figure 3 shown in the figure, eight skirt edges are annularly provided on the side wall of the cap base 32, which is convenient for disassembly and installation; the eight skirt edges provide more holding points for the operator, so that when the protective cap 3 needs to be disassembled, force can be more easily applied, avoiding damage caused by hand slipping or uneven force; the design of the skirt edges may reduce the contact area between the protective cap 3 and the surrounding environment, thereby reducing the frictional resistance during disassembly and making the disassembly process smoother.

[0025] As Figure 1 and Figure 2 shown in the figure, a first nut 11 is provided at the end of the first valve core 14 close to the protective cap 3; the first nut 11 is firmly fixed at a specified position by being screwed onto the valve body 1 or related components. This fixing function ensures the stability and reliability of the valve core during the fluid control process, preventing loosening or displacement caused by vibration or impact; a sealing element such as a sealing washer can be used between the first nut 11 and the valve body 1 or the valve core. By screwing the first nut 11 tightly, the sealing washer can be compressed, thereby forming a tight seal between the valve core and the valve body 1 to prevent fluid leakage; the first nut 11 can also be used as a fine-tuning element. By fine-tuning its tightness, the position of the first valve core 14 can be finely adjusted to meet specific fluid control requirements.

[0026] As Figure 2 shown in the figure, a groove 16 is provided on the side wall of the first valve core 14; the valve core may be subjected to a large pressure and is prone to deformation or even jamming. The existence of the groove 16 can increase the structural strength of the valve core, disperse the pressure of the fluid on the valve core, prevent the valve core from deforming or jamming under high pressure, and ensure the normal operation of the valve.

[0027] As Figure 1 andFigure 2 As shown, a limiting boss 21 is provided on the second valve core 2, and a third nut 23 is installed on the side wall of the limiting boss 21. The design of the limiting boss 21 is mainly to limit the movement range of the second valve core 2 and prevent it from exceeding the predetermined safety limit during movement. This helps protect the valve structure from damage and ensures that the valve can work properly according to the design requirements. By adjusting the tightness of the third nut 23, the limiting effect of the limiting boss 21 on the second valve core 2 can be further accurately controlled, realizing the precise adjustment of the opening and closing positions of the valve. The combination of the limiting boss 21 and the third nut 23 can also be used as a positioning device for the second valve core 2. When the valve is closed or opened, the limiting boss 21 can ensure that the second valve core 2 accurately stays at the predetermined position, thus ensuring the sealing performance and flow control accuracy of the valve.

[0028] As Figure 1 and Figure 2 shown, an input joint 22 is provided at the end of the second valve core 2. The input joint 22 serves as the connection point between the second valve core 2 and an external system (such as a fluid source, a control system, etc.), realizing the effective connection between the valve and a fluid pipeline or other equipment. This connection ensures that the fluid can smoothly enter the valve and flow along the predetermined path under the control of the valve core. The input joint 22 not only realizes the physical connection but also undertakes the task of transmitting the fluid.

[0029] Working principle: During the operation of the valve, the automatic sampling control valve can be installed on the sampling pipeline of a laboratory or a production line. The input joint 22 is connected to the control unit. The sensors in the control unit continuously monitor the flow rate and pressure information and feed the data back to the control unit. According to the preset parameters and algorithms, the position of the valve core is automatically adjusted to ensure the stability and accuracy of the sampling process. The fluid enters the valve through the input joint 22, and after being adjusted and controlled by the valve core, it then flows to the output joint 17 and enters the actuator.

[0030] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the element.

[0031] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic injection control valve, comprising a valve body (1) and a protective cap (3), characterized in that: A clamping joint (15) is provided at one end of the valve body (1), the protective cap (3) is sleeved on the clamping joint (15), the other end of the valve body (1) is fixedly connected to a first valve core (14), a second valve core (2) is provided on a side wall of the first valve core (14), a first passage (13) is provided in the first valve core (14), a second passage (24) is provided in the second valve core (2), an output joint (17) is provided at the other end of the first valve core (14), a second nut (12) is installed at the output joint (17), an annular groove is provided between the second nut (12) and the output joint (17), a rubber ring (18) is installed in the annular groove.

2. The automatic injection control valve according to claim 1, characterized in that: The protective cap (3) comprises a brim (31) and a cap platform (32) arranged on one side of the brim (31); a through slot (33) for sleeve-mounting a clamping joint (15) is provided in the middle of the cap platform (32).

3. The automatic injection control valve according to claim 2, characterized in that: The side wall of the cap platform (32) is surrounded by eight skirt edges for easy disassembly and installation.

4. The automatic injection control valve according to claim 1, characterized in that: A first nut (11) is provided on the first valve core (14) at an end close to the protective cap (3).

5. The automatic injection control valve according to claim 4, characterized in that: A groove (16) is provided on the side wall of the first valve core (14).

6. The automatic injection control valve according to claim 1, characterized in that: A limiting boss (21) is provided on the second valve core (2), and a third nut (23) is mounted on the side wall of the limiting boss (21).

7. The automatic injection control valve according to claim 6, characterized in that: An input connector (22) is provided at the end of the second valve core (2).

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