High air-tightness air volume regulating valve

Abstract

The utility model relates to a high air tightness air volume regulating valve belongs to the technical field of regulating valve, aiming at the problem that traditional regulating valve is poor in sealing, low in regulating precision and unstable in structure, the device forms multistage sealing structure through the resistance design of sealing baffle and fixed horizontal plate, combines elastic sealing strip, effectively reduces gas leakage rate, adopts the engagement design of positioning convex and positioning gap, fixes the rotation angle as discrete gear, each gear corresponds the explicit air volume change value, improves the regulating precision, and the brake assembly drives the limiting block vertical movement through the adjusting screw rod, cooperates with the horizontal locking of clamping rod and clamping groove, forms the longitudinal and horizontal bidirectional stable structure. The device is suitable for industrial ventilation system, realizes the comprehensive performance promotion of high air tightness, accurate regulation and long-term stable operation through structure optimization, and the horizontal locking of clamping rod and clamping groove further restricts the degree of freedom of rotary connecting plate, forms the longitudinal and horizontal bidirectional stable structure, and greatly prolongs the service life of equipment.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, and in particular to a high airtight air volume regulating valve. Background Technology

[0002] In industrial production and building ventilation systems, airflow regulating valves are key components for controlling airflow and adjusting ventilation efficiency. Existing airflow regulating valves typically employ louvered or butterfly valve structures, changing the cross-sectional area of ​​the airflow channel by rotating blades or valve plates. However, these structures have the following problems in practical applications:

[0003] Insufficient sealing performance: When traditional control valves are closed, there is a gap between the blades or valve plate and the valve body. Especially under high temperature or high pressure environments, the sealing material is prone to aging and deformation, resulting in excessive gas leakage and failing to meet the high airtightness requirements.

[0004] Limited adjustment precision: The rotation angle of the blades or valve plate has a non-linear relationship with the change in air volume, making it difficult to achieve precise air volume control. Especially in scenarios that require fine-tuning, the operation is difficult and the adjustment effect is unstable.

[0005] Poor structural stability: After long-term use, rotating parts are prone to loosening due to wear or vibration, causing the valve plate to shift position, which further aggravates sealing failure and airflow fluctuations.

[0006] To address the aforementioned issues, existing technologies have proposed improving performance by adding sealing gaskets or optimizing valve body structure, but these still cannot simultaneously meet the comprehensive requirements of sealing performance, adjustment accuracy, and structural stability. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies, such as insufficient structural sealing performance, limited adjustment accuracy, poor structural stability, and high operational complexity, and to propose a high airtightness airflow regulating valve.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A high airtight air volume regulating valve includes a connecting pipe, wherein an air inlet pipe is fixedly connected to one side of the top of the connecting pipe, and an air outlet is provided on the other side of the bottom of the connecting pipe.

[0010] A limiting plate is fixedly installed on the inner wall of one side of the connecting pipe;

[0011] A connecting shaft is rotatably mounted on one end of the limiting plate. A sealing baffle is rotatably fitted on the outer wall of the connecting shaft. A through hole corresponding to the exhaust port is opened on the sealing baffle.

[0012] An adjustment component, located on the other side of the connecting pipe, is used to drive the connecting shaft to rotate in order to adjust the angle of the sealing baffle.

[0013] A braking assembly, located at the top and bottom of the connecting pipe, is used to brake the sealing baffle after it has been adjusted to the target position.

[0014] In one possible design, the adjustment assembly includes a mounting block, a rotating connecting plate, and a fixing screw. The mounting block rotatably penetrates one side wall of the connecting pipe and engages with one end of the connecting shaft. One end of the mounting block has two symmetrically arranged positioning protrusions integrally formed, and one side of the sealing baffle has two symmetrically arranged positioning notches that engage with the positioning protrusions. The rotating connecting plate is fixedly sleeved on the outer wall of the mounting block, and the fixing screw is threaded through one end of the mounting block and threadedly connected to the connecting shaft.

[0015] In one possible design, the braking assembly includes a limiting block, a U-shaped plate, an adjusting screw, and a torsion block. The limiting block slides through the top and bottom of the connecting pipe. The U-shaped plate is fixedly installed at the top of the connecting pipe. The adjusting screw is threaded through the U-shaped plate, and one end is rotatably connected to the limiting block. The torsion block is fixedly installed at the other end of the adjusting screw. Rotating the torsion block drives the limiting block to move, thereby forming a mechanical block against the sealing baffle when it is closed.

[0016] In one possible design, a fixed sleeve is fixedly inserted through the other end of the rotating connecting plate, and a connecting rod slides through the inside of the fixed sleeve. An operating rotating plate is fixedly installed at one end of the connecting rod, and a locking rod is fixedly installed at the other end. A compression spring is provided between one side of the locking rod and one side of the inner wall of the fixed sleeve, and the two ends of the compression spring abut against the inner wall of the fixed sleeve and one side of the locking rod, respectively.

[0017] In one possible design, a fixed arc plate is fixedly installed on one side of the connecting pipe. The fixed arc plate has multiple slots inside, which engage with the locking rod. The slots are evenly spaced, which discretizes the rotation angle of the sealing baffle to improve the airflow adjustment accuracy.

[0018] In one possible design, a fixed horizontal plate is fixedly installed on both the top and bottom inner walls of the connecting pipe, and a sealing strip is provided on one side of the fixed horizontal plate; when the sealing baffle is in the closed state, its edge abuts against the sealing strip to form a sealing interface.

[0019] In one possible design, the engagement design of the positioning protrusion and the positioning notch allows the rotation angle of the sealing baffle to be fixed at multiple discrete levels, each level corresponding to a different overlap area between the through hole and the exhaust port, so as to achieve precise airflow control.

[0020] In this application, when it is necessary to adjust the air volume during use, the operating plate can be pulled first. The operating plate drives the connecting rod to move laterally, and the connecting rod drives the locking rod to move laterally. At this time, the compression spring is squeezed and the locking rod moves out of the slot. At this time, the braking state of the rotating connecting plate and the fixed arc plate can be released. After rotating the rotating connecting plate, the rotating connecting plate drives the connecting shaft to rotate, and the connecting shaft drives the sealing baffle to rotate, thereby changing the orientation of the sealing baffle and adjusting the air volume.

[0021] Furthermore, when the sealing baffle is adjusted to the closed state, it can also abut against the fixed horizontal plate, thereby improving the sealing performance of the device through the sealing strip. At this time, the torsion block can be rotated, which drives the adjusting screw to move down, and the adjusting screw drives the limiting block to move down. The limiting block penetrates into the interior of the connecting pipe and can then be moved to the other side of the sealing baffle to prevent the sealing baffle from shaking and further improve the stability of the device.

[0022] Beneficial effects:

[0023] Through the contact design between the sealing baffle and the fixed cross plate, combined with the elastic compensation effect of the sealing strip, a multi-stage sealing structure is formed when the valve is closed. Even under high pressure or temperature change environments, the deformation of the sealing strip can still fill tiny gaps, effectively reducing the gas leakage rate and meeting the stringent airtightness requirements of industrial ventilation systems.

[0024] The adjustment component uses a locking design between positioning protrusions and positioning notches to fix the rotation angle of the sealing baffle into discrete levels, each level corresponding to a specific airflow change value. Operators only need to rotate the connecting plate to switch levels, avoiding the accumulation of errors in continuous adjustment and significantly improving the accuracy and repeatability of airflow control.

[0025] The braking assembly uses an adjusting screw to drive the vertical movement of the limiting block. After the sealing baffle is adjusted to the target position, the limiting block can be embedded in its movement path to form a mechanical block, preventing the valve plate from shifting due to airflow impact or vibration. At the same time, the lateral locking of the locking rod and the locking groove further restricts the degree of freedom of the rotating connecting plate, forming a stable structure in both the longitudinal and transverse directions, which greatly extends the service life of the equipment.

[0026] The operating plate is linked to the locking lever via a compression spring, allowing it to be unlocked with a single hand pull. After adjusting by rotating the connecting plate, releasing the lever automatically resets the locking mechanism. This design simplifies the operation process, reduces the risk of human error, and ensures all moving parts are exposed outside the valve body for easy periodic inspection and lubrication maintenance. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural schematic diagram of a high airtightness airflow regulating valve proposed in this utility model.

[0028] Figure 2 A three-dimensional cross-sectional view of a high airtightness air volume regulating valve proposed in this utility model;

[0029] Figure 3 A three-dimensional view of the limiting block and the fixing cross plate in a high airtight air volume regulating valve proposed in this utility model;

[0030] Figure 4 This is an exploded view of the connecting shaft and sealing baffle in a high airtight air volume regulating valve proposed in this utility model.

[0031] Figure 5 This is an exploded view of the rotating connecting plate and connecting rod in a high airtightness air volume regulating valve proposed in this utility model.

[0032] In the diagram: 1. Connecting pipe; 2. Air inlet pipe; 3. Fixed arc plate; 4. Rotating connecting plate; 5. Fixed horizontal plate; 6. Exhaust port; 7. Sealing baffle; 8. Slot; 9. U-shaped plate; 10. Torsion block; 11. Adjusting screw; 12. Sealing strip; 13. Limiting block; 14. Connecting shaft; 15. Fixed sleeve; 16. Positioning notch; 17. Limiting plate; 18. Fixing screw; 19. Operating rotating plate; 20. Connecting rod; 21. Compression spring; 22. Locking rod; 23. Mounting block; 24. Positioning protrusion. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0034] In one embodiment: Refer to Figures 1-5 The specific implementation method of the regulating valve is as follows:

[0035] The regulating valve body consists of a connecting pipe 1, with an air inlet pipe 2 welded to one side of its top and a rectangular exhaust port 6 on the other side of its bottom. A limit plate 17 is bolted to the inner wall of the left side of the connecting pipe 1. A cylindrical connecting shaft 14 is rotatably connected to the end of the limit plate 17, and a sealing baffle 7 is slidably fitted on the outer wall of the connecting shaft 14. The sealing baffle 7 has a through hole of the same size corresponding to the exhaust port 6. When the two holes are aligned, the maximum ventilation volume is achieved; when they are completely misaligned, the valve is closed.

[0036] The adjustment component functions by rotating the mounting block 23, which penetrates the right side wall of the connecting pipe 1. The mounting block 23 is forged from 45# steel, and its inner hole and the end of the connecting shaft 14 are connected by a hexagonal snap-fit ​​structure. Two positioning protrusions 24 are integrally formed on the outer side of the mounting block 23, which engage with two positioning notches 16 on the side of the sealing baffle 7. A rotating connecting plate 4 is fixedly fitted onto the outer wall of the mounting block 23 via a flat key. A fixing screw 18 is threaded onto the end of the rotating connecting plate 4, passing through the end face of the mounting block 23 and locking into the threaded hole at the end of the connecting shaft 14 to ensure the overall rigidity of the component. A fixing sleeve 15 is welded to the other end of the rotating connecting plate 4, through which a connecting rod 20 slides. A locking rod 22 is welded to the end of the connecting rod 20, and a compression spring 21 is installed between the locking rod 22 and the inner wall of the fixing sleeve 15. The two ends of the spring abut against the inner wall of the fixing sleeve 15 and the side of the locking rod 22 via spring seats. An operating rotating plate 19 with anti-slip texture is welded to the outer end of the connecting rod 20. A fixed arc plate 3 is welded to the outer wall of the right side of the connecting pipe 1. The arc surface has multiple sets of equidistant slots 8, and the slots 8 and the locking rod 22 form a multi-position locking.

[0037] Working process: When airflow needs to be adjusted, the operator holds the operating rotary plate 19 and pulls it outward, causing the connecting rod 20 to move laterally. This compresses the clamping rod 22, disengaging the compression spring 21 from the slot 8 of the fixed arc plate 3. At this time, rotating the connecting plate 4 releases the locking state. Rotating the connecting plate 4 causes the mounting block 23 to rotate, which in turn causes the sealing baffle 7 to rotate synchronously via the connecting shaft 14. When the through hole of the sealing baffle 7 and the exhaust port 6 reach the required overlap area, the operating rotary plate 19 is released, and the compression spring 21 pushes the clamping rod 22 into the corresponding slot 8, achieving angle locking.

[0038] When the sealing baffle 7 is in the closed state, its edge and the sealing strip 12 of the fixed horizontal plate 5 form the first line of sealing defense. The wavy texture of the sealing strip 12 undergoes elastic deformation under pressure, filling the microscopic gaps. At this time, rotating the top torsion block 10 drives the adjusting screw 11 to move downward, causing the trapezoidal inclined surface of the limiting block 13 to gradually press against the edge of the sealing baffle 7, forming the second mechanical seal. The trapezoidal design of the limiting block 13 makes the contact pressure increase linearly with the downward movement distance, ensuring the sealing effect while avoiding excessive compression that could cause component deformation. When it is necessary to open the valve, rotating the torsion block 10 in the opposite direction causes the limiting block 13 to rise and disengage, allowing the airflow to be adjusted according to the aforementioned steps.

[0039] This application can be used in the field of control valves, or in other fields applicable to this application.

[0040] In another embodiment: Reference Figures 1-5 A high-airtightness airflow regulating valve is used in the field of regulating valves. The structure of this embodiment is basically the same as the previous embodiment, except that the braking components are distributed at the top and bottom of the connecting pipe 1: a U-shaped plate 9 is fixed to the top by bolts, and an adjusting screw 11 is threaded through its internal threads. A torsion block 10 is welded to the top of the adjusting screw 11, and the bottom is rotatably connected to the limiting block 13 through a thrust bearing. The limiting block 13 has a trapezoidal cross-section. When the adjusting screw 11 moves the limiting block 13 downward, the trapezoidal inclined surface makes progressive contact with the edge of the sealing baffle 7. The inner walls of the top and bottom of the connecting pipe 1 are fixed with bolts to a fixing cross plate 5, and a silicone rubber sealing strip 12 is embedded in the contact surface with the sealing baffle 7. The working surface of the sealing strip 12 is processed with a wavy pattern to enhance the sealing effect.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high airtightness airflow regulating valve, characterized in that, include: A connecting pipe (1) is fixedly connected to an air inlet pipe (2) on one side of the top of the connecting pipe (1), and an exhaust port (6) is opened on the other side of the bottom of the connecting pipe (1). A limiting plate (17) is fixedly installed on the inner wall of one side of the connecting pipe (1); A connecting shaft (14) is rotatably mounted on one end of the limiting plate (17). A sealing baffle (7) is rotatably fitted on the outer wall of the connecting shaft (14). A through hole corresponding to the exhaust port (6) is opened on the sealing baffle (7). An adjustment component, located on the other side of the connecting pipe (1), is used to drive the connecting shaft (14) to rotate in order to adjust the angle of the sealing baffle (7); A braking assembly is provided at the top and bottom of the connecting pipe (1) for braking the sealing baffle (7) after it has been adjusted to the target position.

2. The high airtightness airflow regulating valve according to claim 1, characterized in that, The adjustment assembly includes a mounting block (23), a rotating connecting plate (4), and a fixing screw (18). The mounting block (23) is rotatably inserted through one side wall of the connecting pipe (1) and is engaged with one end of the connecting shaft (14). One end of the mounting block (23) is integrally formed with two symmetrically arranged positioning protrusions (24). One side of the sealing baffle (7) is provided with two symmetrically arranged positioning notches (16), and the positioning notches (16) are engaged with the positioning protrusions (24). The rotating connecting plate (4) is fixedly sleeved on the outer wall of the mounting block (23), and the fixing screw (18) is threaded through one end of the mounting block (23) and threadedly connected to the connecting shaft (14).

3. The high airtightness airflow regulating valve according to claim 1, characterized in that, The braking assembly includes a limiting block (13), a U-shaped plate (9), an adjusting screw (11), and a torsion block (10). The limiting block (13) slides through the top and bottom of the connecting pipe (1). The U-shaped plate (9) is fixedly installed on the top of the connecting pipe (1). The adjusting screw (11) is threaded through the U-shaped plate (9) and one end is rotatably connected to the limiting block (13). The torsion block (10) is fixedly installed on the other end of the adjusting screw (11). The limiting block (13) is driven to move by rotating the torsion block (10) to form a mechanical block against the sealing baffle (7) when it is closed.

4. The high airtightness airflow regulating valve according to claim 2, characterized in that, The other end of the rotating connecting plate (4) is fixedly connected to a fixed sleeve (15). A connecting rod (20) slides through the inside of the fixed sleeve (15). An operating rotating plate (19) is fixedly installed at one end of the connecting rod (20), and a locking rod (22) is fixedly installed at the other end. A compression spring (21) is provided between one side of the locking rod (22) and one side of the inner wall of the fixed sleeve (15). The two ends of the compression spring (21) abut against the inner wall of the fixed sleeve (15) and one side of the locking rod (22), respectively.

5. The high airtightness airflow regulating valve according to claim 4, characterized in that, A fixed arc plate (3) is fixedly installed on one side of the connecting pipe (1). The fixed arc plate (3) has multiple slots (8) inside. The slots (8) engage with the clamping rod (22). The slots (8) are evenly spaced, so that the rotation angle of the sealing baffle (7) is discretized to improve the air volume adjustment accuracy.

6. The high airtightness airflow regulating valve according to claim 1, characterized in that, The top inner wall and bottom inner wall of the connecting pipe (1) are fixedly installed with a fixing plate (5), and a sealing strip (12) is provided on one side of the fixing plate (5).

7. The high airtightness airflow regulating valve according to claim 2, characterized in that, The engaging design of the positioning protrusion (24) and the positioning notch (16) allows the rotation angle of the sealing baffle (7) to be fixed at multiple discrete levels. Each level corresponds to a different overlap area between the through hole and the exhaust port (6) to achieve precise airflow control.

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