Air curtain micro-flow control device

Abstract

The utility model provides a micro-flow control device for an air curtain. The micro-flow control device comprises a capillary tube, a fixed joint and a fixed seat, the capillary tube is arranged in the fixing connector in a penetrating mode, and the fixing connector is installed on the fixing base. A first opening is formed in the side wall of the fixed seat; the capillary tube penetrates through the fixed joint, one end of the capillary tube is connected with the first opening, and the other end of the capillary tube extends to the outer side of the fixed joint; the first opening is used for guiding in protective gas, and the capillary tube is used for guiding the protective gas to the position where an air curtain needs to be formed. According to the air curtain micro-flow control device, the capillary tube is used as a gas transmission path, a more efficient, economical and reliable solution is provided, and the air curtain micro-flow control device is used for protecting a sensitive element from being influenced by external pollution in various industrial and scientific research scenes.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental monitoring equipment, and particularly relates to an air curtain micro-flow control device. Background Art

[0002] Online instruments are usually equipped with sensor probes, which need to directly contact the measured environment to obtain accurate data. However, in many actual application scenarios, the measured environment may contain corrosive substances, pollutants or other harmful components, which may damage the sensor probes, thus affecting the measurement accuracy and the service life of the equipment.

[0003] Deficiencies of the prior art:

[0004] 1. Difficulty in micro-flow control: Traditionally, it is controlled by mechanical adjustment devices such as needle valves. Such methods are more effective for adjustments within a large flow range, but are inadequate when achieving extremely fine flow control, especially in application scenarios requiring extremely high precision.

[0005] 2. High cost: The price of high-precision regulating valves is often very expensive, and their complex structure also increases the maintenance and replacement costs, which is a significant obstacle for applications with limited budgets or cost sensitivity.

[0006] 3. Reliability issues: Due to the presence of internal moving parts, mechanical regulators are prone to wear or jamming over time, resulting in performance degradation or even failure, thus affecting the stable operation of the entire system.

[0007] 4. Low integration: Traditional air curtain control systems are usually composed of multiple independent components, with a complex installation process and are not easily integrated into a compact design, especially in situations where space is extremely limited.

[0008] Therefore, there are deficiencies in the prior art and further improvements are needed. Summary of the Utility Model

[0009] In view of the problems existing in the prior art, the utility model provides an air curtain micro-flow control device.

[0010] To achieve the above object, the specific scheme of the utility model is as follows:

[0011] The utility model provides an air curtain micro-flow control device, including:

[0012] A capillary tube, a fixed joint, and a fixed seat;

[0013] The capillary tube is inserted through the fixed joint, and the fixed joint is installed on the fixed seat;

[0014] A first opening is provided on the side wall of the fixed seat;

[0015] The capillary penetrates through the fixed joint, one end of the capillary is connected to the first opening and the other end extends outside the fixed joint;

[0016] The first opening is used to introduce a protective gas, and the capillary is used to direct the protective gas to the position where an air curtain needs to be formed.

[0017] Further, the fixed joint and the fixed seat are installed in a measurement cavity;

[0018] A second opening is also provided at a position on the measurement cavity corresponding to the first opening;

[0019] A first channel is also provided on the measurement cavity;

[0020] One end of the capillary is connected to the first channel and the other end is connected to the first opening, and is used to introduce the protective gas from the first opening into the first channel;

[0021] A window plate or a sensor (pressure sensor) is also provided in the first channel;

[0022] The window plate serves as a window of the optical system;

[0023] The window plate or the sensor is protected by an air curtain formed by the protective gas.

[0024] Further, a high-temperature sealant is provided between the outer wall of the capillary and the fixed joint.

[0025] Further, the fixed joint and the fixed seat are connected by threads.

[0026] Further, the capillary is made of quartz glass or stainless steel.

[0027] Further, the protective gas includes argon, nitrogen, and air.

[0028] Further, a first installation groove is provided on the end face of the side of the fixed joint facing the fixed seat, and a first sealing ring is provided therein for sealing between the fixed joint and the fixed seat.

[0029] Further, a second installation groove and a third installation groove are respectively provided on both sides of the first opening on the outer wall of the fixed seat;

[0030] A second sealing ring and a third sealing ring are respectively provided in the second installation groove and the third installation groove for sealing between the fixed seat and the measurement cavity, so as to realize the sealed butt joint between the second opening and the first opening.

[0031] Adopting the technical solution of the present utility model has the following beneficial effects:

[0032] 1. Precise micro-flow control: By using a capillary tube as the gas transmission path, the device can achieve precise control of the minute flow rate of the protective gas. The selection of the capillary tube can be adjusted according to the required flow rate, thus meeting the specific needs in different application scenarios.

[0033] 2. Enhanced sealing performance: A threaded connection is adopted between the fixed joint and the fixed seat, and a first sealing ring is provided between the two; in addition, second and third sealing rings are also provided between the fixed seat and the measurement cavity. These multiple sealing measures ensure good sealing of the entire system, prevent contaminants in the external environment from entering, and also avoid leakage of the protective gas, improving the reliability and stability of the system.

[0034] 3. Material durability: The capillary tube can be made of quartz glass or stainless steel. Both of these materials have good corrosion resistance and thermal stability, and are suitable for long-term use in harsh working environments without being easily damaged.

[0035] 4. Flexible application range: The protective gas can be selected from various types such as argon, nitrogen, or air, which makes the device applicable to a wide range of industrial and scientific application fields, including but not limited to optical system protection, pressure sensor protection, etc.

[0036] 5. Simplified structural design: Compared with the traditional regulating valve control system, the capillary-based air curtain control scheme reduces the number of mechanical components and simplifies the overall structure. Such a design not only reduces the manufacturing cost, but also facilitates installation and maintenance, while improving the compactness and integration of the system.

[0037] 6. Improved reliability: Due to the reduction of the complex mechanical adjustment part, this design reduces potential failure points and improves the stability and reliability during long-term operation.

[0038] 7. Easy integration: The design of the device allows it to be easily integrated into the existing measurement cavity or other equipment without major modification of the existing facilities, and has strong adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 is a cross-sectional view of the present utility model;

[0040] Figure 2 is a cross-sectional view of the present utility model after being installed in the measurement cavity.

[0041] In the figure:

[0042] 1. Capillary; 2. Fixed joint; 3. Fixed seat; 4. First opening; 5. Protection gas; 6. Air curtain; 7. Measurement cavity; 8. Second opening; 9. First channel; 10. First installation groove; 11. First sealing ring; 12. Second installation groove; 13. Third installation groove; 14. Second sealing ring; 15. Third sealing ring; 16. Window piece. Detailed implementation mode

[0043] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely used to explain the present utility model and do not limit the present utility model. Additionally, it should be noted that for the sake of convenience in description, only the parts related to the present utility model rather than all the structures are shown in the drawings.

[0044] In the description of the present utility model, unless otherwise clearly specified and defined, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0045] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above the", and "on the" second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is lower than that of the second feature.

[0046] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "front", "back", "left", and "right" are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0047] Combined with Figure 1 - Figure 2 As shown, the present utility model provides an air curtain micro-flow control device, including:

[0048] Capillary 1, fixed joint 2, fixed seat 3;

[0049] The capillary 1 is inserted into the fixed joint 2, and the fixed joint 2 is installed on the fixed seat 3;

[0050] A first opening 4 is provided on the side wall of the fixed seat 3;

[0051] The capillary 1 penetrates through the fixed joint 2, one end of the capillary 1 is connected to the first opening 4 and the other end extends outside the fixed joint 2;

[0052] The first opening 4 is used to introduce a protective gas 5, and the capillary 1 is used to direct the protective gas 5 to the position where an air curtain 6 needs to be formed.

[0053] The fixed joint 2 and the fixed seat 3 are installed in a measurement cavity 7;

[0054] A second opening 8 is also provided at a position on the measurement cavity 7 corresponding to the first opening 4;

[0055] A first channel 9 is also provided on the measurement cavity 7;

[0056] One end of the capillary 1 is connected to the first channel 9 and the other end is connected to the first opening 4, for introducing the protective gas 5 from the first opening 4 into the first channel 9;

[0057] A window piece 16 or a sensor (pressure sensor) is also provided in the first channel 9;

[0058] The window piece 16 serves as a window of the optical system;

[0059] The window piece 16 or the sensor is protected by the air curtain 6 formed by the protective gas 5.

[0060] A high-temperature sealant is provided between the outer wall of the capillary 1 and the fixed joint 2.

[0061] The fixed joint 2 and the fixed seat 3 are connected by threads.

[0062] The capillary 1 is made of quartz glass or stainless steel.

[0063] The protective gas 5 includes argon, nitrogen, air.

[0064] On the end face of the side of the fixed joint 2 facing the fixed seat 3, a first mounting groove 10 is provided, in which a first sealing ring 11 is provided for sealing between the fixed joint 2 and the fixed seat 3.

[0065] On the outer wall of the fixed seat 3, a second mounting groove 12 and a third mounting groove 13 are respectively provided on both sides of the first opening 4;

[0066] A second sealing ring 14 and a third sealing ring 15 are respectively arranged in the second installation groove 12 and the third installation groove 13 for sealing between the fixing base 3 and the measuring cavity 7, so as to realize the sealed butt joint between the second opening 8 and the first opening 4.

[0067] The principle of the present utility model is as follows:

[0068] The present utility model provides an air curtain 6 micro-flow control device, whose main purpose is to isolate and protect sensitive components (such as a window piece 16 or a sensor) from the influence of the external environment by forming a protective air curtain 6. The following is the working principle of this device:

[0069] Gas introduction:

[0070] The protective gas 5 (such as argon, nitrogen or air) is introduced from the first opening 4 on the side wall of the fixing base 3.

[0071] After the high-pressure and large-flow gas enters, it is transmitted through the capillary 1 arranged in the fixed joint 2.

[0072] Gas transmission and control:

[0073] One end of the capillary 1 is connected to the first opening 4, and the other end extends out of the fixed joint 2 to direct the protective gas 5 to the position where the air curtain 6 needs to be formed.

[0074] The design of the capillary 1 enables precise control of the micro-flow of the gas by changing the inner diameter or length of the capillary 1 to increase or decrease the resistance. This design is simpler and lower in cost compared with the traditional regulating valve.

[0075] The capillary 1 can be made of quartz glass or stainless steel to adapt to different working conditions, such as the requirements of high temperature resistance or corrosion resistance.

[0076] Sealing structure:

[0077] The fixed joint 2 and the fixing base 3 are connected by threads, and a first sealing ring 11 is arranged between the two to ensure good sealing performance.

[0078] The gap between the outer wall of the capillary 1 and the fixed joint 2 is filled with high-temperature sealant to further enhance the sealing effect.

[0079] When installed in the measuring cavity 7, second and third sealing rings 15 are also provided between the fixing base 3 and the measuring cavity 7 to ensure the sealing of the whole system.

[0080] Application example:

[0081] When the device is installed in a measurement cavity 7, there will be a second opening 8 corresponding to the first opening 4 on the measurement cavity 7, and a first channel 9 for placing the window piece 16 or the sensor.

[0082] The protective gas 5 is introduced into the first channel 9 through the capillary 1 from the first opening 4, and then forms a thin gas curtain 6 around the window piece 16 or the sensor.

[0083] This gas curtain 6 can effectively isolate external pollutants without affecting the normal operation of the optical system or the pressure sensor.

[0084] Integration and operation:

[0085] The device has a compact structure and is easy to be integrated into existing measurement equipment.

[0086] By selecting capillaries 1 with different diameters, the user can adjust the flow rate of the gas curtain 6 according to actual needs to achieve adaptive control.

[0087] In summary, the present utility model realizes fine-tuning control of the flow rate of the protective gas 5 through a delicate design, and at the same time provides reliable sealing performance, thereby providing an economical and effective protection solution for sensitive components.

[0088] The above are only the preferred embodiments of the present utility model, and do not limit the scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields, is included in the protection scope of the present utility model.

Claims

1. An air curtain micro-flow control device, characterized in that, Comprising: Capillary tube, fixed joint, fixed seat; The capillary tube is inserted into the fixed joint, and the fixed joint is installed on the fixed seat; A first opening is provided on the side wall of the fixed seat; The capillary tube penetrates through the fixed joint, one end of the capillary tube is connected to the first opening and the other end extends outside the fixed joint; The first opening is used to introduce a protective gas, and the capillary tube is used to direct the protective gas to the position where an air curtain needs to be formed.

2. The air curtain micro-flow control device according to claim 1, characterized in that The fixed joint and the fixed seat are installed in a measurement cavity; A second opening is also provided at a position on the measurement cavity corresponding to the first opening; A first channel is also provided on the measurement cavity; One end of the capillary tube is connected to the first channel and the other end is connected to the first opening, for introducing the protective gas from the first opening into the first channel; A window piece or a sensor is also provided in the first channel; The window piece serves as a window of the optical system; The window piece or the sensor is protected by an air curtain formed by the protective gas.

3. The air curtain micro-flow control device according to claim 1, characterized in that A high-temperature sealant is provided between the outer wall of the capillary tube and the fixed joint.

4. The air curtain micro-flow control device according to claim 1, characterized in that The fixed joint and the fixed seat are connected by threads.

5. The air curtain micro-flow control device according to claim 1, characterized in that The capillary tube is made of quartz glass or stainless steel.

6. The air curtain micro-flow control device according to claim 1, characterized in that The protective gas includes argon, nitrogen, air.

7. The air curtain micro-flow control device according to claim 1, characterized in that A first installation groove is provided on the end face of the side of the fixed joint facing the fixed seat, and a first sealing ring is provided therein for sealing between the fixed joint and the fixed seat.

8. The air curtain micro-flow control device according to claim 2, characterized in that Second installation grooves and third installation grooves are respectively provided on both sides of the first opening on the outer wall of the fixed seat; A second sealing ring and a third sealing ring are respectively provided in the second installation groove and the third installation groove for sealing between the fixed seat and the measurement cavity, so as to realize the sealed butt joint of the second opening and the first opening.

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