Low flow gas detection device based on valve opening regulation

Abstract

The utility model belongs to gas detection technical field, concretely is small flow gas detection device based on valve opening degree regulation, including valve body, still include: gas detection subassembly, set up at valve body top, flow detection subassembly, set up in valve body outer wall and with its inside intercommunication, baffle, set up in valve body inner wall middle segment, and its top is provided with ladder hole, first limit frame, fixed setting in valve body inside bottom, sealing assembly, through setting on first limit frame, and its top cooperates with ladder hole, first sealing plate, set up in valve body one end, the utility model provides small flow gas detection device based on valve opening degree regulation, can carry out quick sealing to valve body when needing closing valve body in the emergency, relative to the speed of screw rod closed mode is faster, adapts the gas flow demand of quick change, especially in small flow gas detection, can realize more accurate control, simple structure simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a small-flow gas detection device based on valve opening adjustment. Background Technology

[0002] With the increasing demand for gas detection across various industries, especially in the detection of low-flow-rate gases, traditional methods face certain challenges. Low-flow-rate gas detection devices based on valve opening regulation, with their precise gas flow control capabilities, can provide higher detection accuracy and stability in multiple application areas. These devices, by optimizing gas flow regulation, can effectively handle situations with small variations in gas concentration, ensuring the reliability of detection results. In the future, with technological advancements, gas detection devices will continue to improve in terms of intelligence, automation, and multifunctionality, further meeting the needs of various complex environments.

[0003] However, in practical applications of existing technology, if an emergency requires valve closure, an external motor is needed to drive a lead screw to close the valve body. When the external motor pushes the lead screw to close the valve, there may be a certain mechanical delay or frictional resistance, which affects the closing speed and stability. Especially under low flow conditions, even small fluctuations in flow rate have a significant impact on gas detection devices, potentially causing the sensor to fail to respond promptly to drastic changes in gas flow, thus affecting the accuracy of the detection results. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the existing technology, the valve body is closed by an external motor driving a lead screw, which may have a certain mechanical delay or frictional resistance, affecting the closing speed and stability. The invention proposes a small flow gas detection device based on valve opening adjustment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A low-flow gas detection device based on valve opening regulation includes a valve body and also includes: The gas detection component is located on the top of the valve body; The flow detection component is located on the outer wall of the valve body and is connected to its interior. A baffle plate is installed in the middle section of the valve body, and a stepped hole is provided at its top; The first limiting bracket is fixedly installed at the bottom of the valve body; A sealing assembly is disposed through the first limiting frame, and its top mates with a stepped hole; The first sealing plate is located at one end of the valve body, and a pressure gauge connected to the inside of the valve body for detecting pressure is installed on its outer wall. The air rod is installed on the outer wall of the first sealing plate, and its output end passes through the valve body and is equipped with a drive component wheel for moving the sealing assembly to achieve closure.

[0006] Furthermore, the sealing assembly includes a helical toothed rod that passes through the first limiting frame, a second sealing plate disposed at the top of the helical toothed rod, a limiting ring fixedly connected to the outer side of the bottom of the helical toothed rod, and a spring sleeved on the outside of the helical toothed rod and disposed between the limiting ring and the first limiting frame.

[0007] Furthermore, the drive assembly includes a fixed frame fixedly connected to the end of the air rod, a helical gear meshing with the helical gear rod is provided on the inner side of the fixed frame, a drive motor whose output end is fixedly connected to the helical gear is also provided on the outer wall of the fixed frame, and an electrical isolation cover that cooperates with the drive motor is provided on the outer wall of the fixed frame.

[0008] Furthermore, a support frame for limiting the position of the limiting ring is fixedly connected to the inner side of the bottom of the valve body.

[0009] Furthermore, the gas detection assembly includes a sealing cover, which is fixedly connected to the top wall of the valve body. Gas composition analyzers are fixedly connected to both sides of the top of the sealing cover, and the detection end of the gas composition analyzer is connected to the inside of the valve body through the sealing cover.

[0010] Furthermore, the flow detection component includes two flow sensors, which are connected to the internal space of the valve body through the valve body.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. The small-flow gas detection device based on valve opening adjustment described in this utility model, when the valve body needs to be closed in an emergency, only requires the air rod to drive the helical gear away from the first limit frame via the fixed frame, thus canceling the engagement with the first limit frame and removing the support for the first limit frame. Then, the spring uses the first limit frame as the stress point to push the limit ring to the bottom, thereby driving the helical gear rod and the second sealing plate to move to the bottom simultaneously through the limit ring, so that the second sealing plate engages with the through hole on the partition, which can quickly seal the valve body. Compared with the screw sealing method, it is faster and adapts to rapidly changing gas flow requirements. Especially in the detection of small-flow gas, it can achieve more precise control, and the structure is simple.

[0012] 2. The small-flow gas detection device based on valve opening adjustment described in this utility model significantly improves detection accuracy and system reliability by incorporating multiple detection sensors and devices within the valve body. Multiple sensors work collaboratively to provide more comprehensive data, enhancing fault tolerance and ensuring stable system operation even if a single sensor fails. Data fusion enables adaptation to complex environments, optimizes gas flow control, and improves system flexibility and adaptability. Furthermore, accurate data monitoring allows for precise control of equipment operation, reducing the occurrence of operational errors. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 2 ; Figure 3 This is a schematic diagram of the three-dimensional structure of this utility model. Figure 3 ; Figure 4 This is a cross-sectional structural diagram of the valve body in this utility model; Figure 5 This is a partial three-dimensional structural diagram of the helical gear in this utility model; Figure 6 This is a partial three-dimensional structural diagram of the helical toothed rod in this utility model.

[0014] In the picture: 1. Valve body; 11. Sealing cover; 12. Gas composition analyzer; 13. Flow sensor; 14. First sealing plate; 15. Pressure gauge; 16. Partition plate; 2. First limiting frame; 21. Helical gear; 22. Limiting ring; 23. Spring; 24. Second sealing plate; 25. Support frame; 3. Gas rod; 31. Fixing frame; 32. Drive motor; 33. Electrical isolation cover; 34. Helical gear. Detailed Implementation

[0015] The technical solutions in the embodiments of this utility model will now be clearly and completely described in conjunction with the accompanying drawings.

[0016] Reference Figure 1-6A small-flow gas detection device based on valve opening adjustment includes a valve body 1. A gas detection component is installed on the top of the valve body 1, and the gas detection component is supported and fixed by the valve body 1. A flow detection component is installed on the outer wall of the valve body 1 and communicates with its interior, and the flow detection component detects the flow rate inside the valve body 1 through the valve body 1. A partition 16 is provided in the middle section of the inner wall of the valve body 1, and a stepped hole is opened on the top of the partition 16, which divides the internal space of the valve body 1. A first limiting frame 2 is fixedly installed on the bottom inner side of the valve body 1. A sealing component is installed through the first limiting frame 2, and its top cooperates with the stepped hole. Position frame 2 limits the sealing assembly; a first sealing plate 14 is provided at one end of the valve body 1, which seals and fixes one side of the valve body 1. A pressure gauge 15 connected to the inside of the valve body 1 is provided on its outer wall for detecting pressure. The pressure gauge 15 is supported and fixed by the valve body 1, and the pressure gauge 15 detects the pressure inside the valve body 1. An air rod 3 is provided on the outer wall of the first sealing plate 14, which is supported and fixed by the first sealing plate 14. Its output end passes through the valve body 1 and is provided with a drive assembly for moving the sealing assembly to achieve closure. The air rod 3 drives the drive assembly to move.

[0017] The sealing assembly includes a helical toothed rod 21 that passes through the first limiting frame 2, a second sealing plate 24 disposed at the top of the helical toothed rod 21, a limiting ring 22 fixedly connected to the outer side of the bottom of the helical toothed rod 21, and a spring 23 sleeved on the outside of the helical toothed rod 21 and disposed between the limiting ring 22 and the first limiting frame 2. The first limiting frame 2 limits the helical toothed rod 21, allowing the helical toothed rod 21 to move up and down inside the first limiting frame 2. At the same time, the spring 23 pushes the limiting ring 22 to the bottom with the first limiting frame 2 as the stress point. Simultaneously, the limiting ring 22 drives the helical toothed rod 21 to move synchronously, and the helical toothed rod 21 drives the second sealing plate 24 to move synchronously, thereby sealing the stepped hole on the partition 16 and closing the valve body 1.

[0018] The drive assembly includes a fixed frame 31 fixedly connected to the end of the pneumatic rod 3. A helical gear 34 meshing with the helical gear 21 is provided on the inner side of the fixed frame 31. The fixed frame 31 is driven by the pneumatic rod 3, and the fixed frame 31 is moved by the pneumatic rod 3. A drive motor 32 with its output end fixedly connected to the helical gear 34 is also provided on the outer wall of the fixed frame 31. The drive motor 32 is fixed by the fixed frame 31, and the helical gear 34 is rotated by the drive motor 32. An electrical isolation cover 33 that cooperates with the drive motor 32 is provided on the outer wall of the fixed frame 31 to electrically isolate the drive motor 32. A braking system is provided on the outside of the drive motor 32. After the helical gear 34 leaves the helical gear 21, the angle of the helical gear 34 can be fixed by the braking system (the braking system is prior art and will not be described) to achieve a self-locking function.

[0019] A support frame 25 for limiting the position of the limiting ring 22 is fixedly connected to the inner bottom of the valve body 1. The valve body 1 supports and fixes the support frame 25, and the support frame 25 supports the limiting ring 22, thereby reducing the stress on the spring 23 when it is not in use and extending its service life.

[0020] The gas detection assembly includes a sealing cover 11, which is fixedly connected to the top wall of the valve body 1. The valve body 1 supports and fixes the sealing cover 11. Gas composition analyzers 12 are fixedly connected to both sides of the top of the sealing cover 11. The sealing cover 11 supports and fixes the gas composition analyzers 12 on both sides. The detection end of the gas composition analyzer 12 is connected to the inside of the valve body 1 through the sealing cover 11, and the gas composition analyzer 12 analyzes the gas composition inside the valve body 1.

[0021] The flow detection assembly includes two flow sensors 13. The flow sensors 13 are connected to the internal space of the valve body 1 through the valve body 1. The flow sensors 13 are supported and fixed by the valve body 1, and the flow sensors 13 detect the flow inside the valve body 1.

[0022] Operating method: First, the drive motor 32 drives the helical gear 34 to rotate, which in turn drives the helical gear 21 to move upwards. Simultaneously, the helical gear 21 drives the limiting ring 22 and the second sealing plate 24 to move synchronously, thus releasing the engagement between the second sealing plate 24 and the through hole on the partition plate 16, allowing gas to flow inside the valve body 1. At the same time, the limiting ring 22 compresses the spring 23. The gas composition analyzer 12 analyzes the gas composition inside the valve body 1. During operation, the flow rate of the gas flowing inside the valve body 1 is monitored by the flow sensor 13, and the pressure gauge 15 monitors the internal pressure of the valve body 1 in real time. During the monitoring process, the gas composition analyzer 12, flow sensor 13, and pressure gauge 15 upload data to a remote location in real time, perform calculations, and store the data. When abnormal data occurs, the terminal controls the operation of the air rod 3. The air rod 3 moves away from the helical toothed rod 21 using the fixed frame 31, canceling the engagement with the helical toothed rod 21 and simultaneously canceling the support for the helical toothed rod 21. The spring 23 pushes the limiting ring 22 to the bottom with the first limiting frame 2 as the stress point. The limiting ring 22 drives the helical toothed rod 21 and the second sealing plate 24 to the bottom, so that the first limiting frame 2 engages with the through hole on the partition plate 16, completing the sealing of the valve body 1.

Claims

1. A small-flow gas detection device based on valve opening adjustment, comprising a valve body (1), characterized in that, Also includes: A gas detection assembly is located on top of the valve body (1); A flow detection component is installed on the outer wall of the valve body (1) and connected to its interior; A partition (16) is provided in the middle section of the inner wall of the valve body (1), and a stepped hole is provided on its top. The first limiting frame (2) is fixedly installed at the bottom inside the valve body (1); A sealing component is provided through the first limiting frame (2), and its top is matched with the stepped hole; The first sealing plate (14) is located at one end of the valve body (1), and a pressure gauge (15) connected to the inside of the valve body (1) is provided on its outer wall for detecting pressure. The air rod (3) is set on the outer wall of the first sealing plate (14), and its output end passes through the valve body (1) and is provided with a drive component for moving the sealing assembly to achieve closure.

2. The small-flow gas detection device based on valve opening adjustment according to claim 1, characterized in that, The sealing assembly includes a helical toothed rod (21) that passes through the first limiting frame (2), a second sealing plate (24) that is disposed on the top of the helical toothed rod (21), a limiting ring (22) that is fixedly connected to the outer side of the bottom of the helical toothed rod (21), and a spring (23) that is sleeved on the outside of the helical toothed rod (21) and disposed between the limiting ring (22) and the first limiting frame (2).

3. The small-flow gas detection device based on valve opening adjustment according to claim 1, characterized in that, The drive assembly includes a fixed frame (31) fixedly connected to the end of the air rod (3), a helical gear (34) meshing with the helical gear rod (21) is provided on the inner side of the fixed frame (31), a drive motor (32) whose output end is fixedly connected to the helical gear (34) is also provided on the outer wall of the fixed frame (31), and an electrical isolation cover (33) cooperating with the drive motor (32) is provided on the outer wall of the fixed frame (31).

4. The small-flow gas detection device based on valve opening adjustment according to claim 1, characterized in that, The valve body (1) has a support frame (25) fixedly connected to the bottom inner side for limiting the position of the limiting ring (22).

5. The small-flow gas detection device based on valve opening adjustment according to claim 1, characterized in that, The gas detection assembly includes a sealing cover (11), which is fixedly connected to the top wall of the valve body (1). Gas composition analyzers (12) are fixedly connected to both sides of the top of the sealing cover (11). The detection end of the gas composition analyzer (12) is connected to the inside of the valve body (1) through the sealing cover (11).

6. The small-flow gas detection device based on valve opening adjustment according to claim 1, characterized in that, The flow detection component includes two flow sensors (13), which are connected to the internal space of the valve body (1) through the valve body (1).

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