Seal head fitting for a damper blade

Abstract

The utility model discloses a sealing sleeve head accessory of air valve blade, specifically relates to the field of ventilation and air conditioning equipment, including air valve outer frame, and the inside wall of air valve outer frame longitudinal both sides is equipped with side seal subassembly, and the inside of air valve outer frame is evenly arranged with a plurality of valve blades, side seal subassembly includes fixed bolster, and the outside of fixed bolster swing is equipped with arc spring plate, and the inside wall of blade sleeve head spare and blade main part brim is equipped with soft quality elastic sealing pad, the utility model discloses through rigid seal shell A and B form the even sealing surface, and cooperate the arc spring plate of side seal subassembly realizes the surface contact of continuous even, eliminates the gap of leakable wind, effectively eliminates the tiny leakage channel between blade end and valve frame, has improved the sealing performance, reduced the leakage channel, strengthened the sealing reliability under the closed state, and soft quality elastic sealing pad makes up the defect such as the unevenness of blade length, the burrs on blade and the unneatness of the end head after the forming of reinforcing rib, ensures the air valve tightness.

Description

Technical Field

[0001] This utility model relates to the field of ventilation and air conditioning equipment technology, and more specifically, to sealing sleeve accessories for air valve blades. Background Technology

[0002] Multi-blade dampers are key components in ventilation, air conditioning, and fire smoke exhaust systems for subways, tunnels, large public buildings, and industrial plants. Their core function is to precisely control airflow and ensure good sealing when closed to meet environmental control, energy conservation, and fire protection requirements.

[0003] The current mainstream multi-blade damper structure mainly includes a valve frame, blades, shaft, linkage mechanism and sealing elements. Its manufacturing process usually involves shearing and bending sheet metal and then riveting it with corner pieces to form the valve frame; the blades are made by riveting two sheared and bent sheet metal pieces together. During this process, reinforcing ribs and sealing strip interlocking structures are pressed out to improve the overall strength.

[0004] To achieve sealing, existing technologies generally employ two strategies: one is to install elastic sealing strips (such as rubber) at the contact edges of adjacent blades, relying on the compression deformation when the blades are closed to achieve sealing between them; the other is to assemble arc-shaped elastic springs (metal or non-metallic) on the valve frame support, so that when the valve is closed, the blade ends press against the surface of the springs, attempting to seal the gap between the blade ends and the valve frame. However, these methods have inherent defects that are difficult to overcome. Due to the inevitable length deviations and squareness errors that occur during the shearing, bending, and riveting processes of the blades, the ends of the entire row of blades cannot remain flush; at the same time, the bending process of the blade reinforcing ribs will form irregular recesses or openings (often appearing as multiple "square holes") at the ends, causing the blade ends to lose their flat sealing surface characteristics. Therefore, when the blade ends contact the arc-shaped springs, only point-like or localized linear contact can be formed, failing to achieve continuous and uniform surface contact, thus creating a large number of tiny leakage channels. In addition, the burrs at the blade tips can easily scratch the reeds, and after long-term operation, the contact condition will deteriorate further, the sealing performance will continue to decline, and it will be difficult to consistently meet the stringent requirements of medium or high sealing levels. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a sealing sleeve accessory for the wind valve blade. The technical problem to be solved by the present invention is: how to overcome the defects of the prior art, such as poor sealing at the end of the wind valve blade and sensitivity to manufacturing errors.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sealing sleeve accessory for a damper blade, including a damper outer frame, side sealing components provided on the inner walls of both longitudinal sides of the damper outer frame, and multiple valve blades evenly arranged inside the damper outer frame;

[0007] The side sealing assembly includes a fixed bracket, and an arc-shaped spring plate is movably provided on the outside of the fixed bracket;

[0008] The valve blade includes a blade body, a steering shaft is fixedly provided in the middle of the blade body, a blade sleeve is fixedly provided on the outer side of the blade body, and a soft elastic sealing gasket is provided on the inner wall of the blade sleeve and the edge of the blade body.

[0009] The blade body has mounting grooves at both ends. A rigid sealing shell A is installed in the mounting groove at one end, and a rigid sealing shell B is installed in the mounting groove at the other end.

[0010] In a preferred embodiment, the rigid sealing shell A section is configured as a circular ring plus a T-shaped mounting seat, the T-shaped mounting seat being loaded in a mounting groove;

[0011] The rigid sealing shell B has an "Ω" shaped cross section and is formed by stamping and bending metal sheet. The widths of both the rigid sealing shell A and the rigid sealing shell B are equal to the width of the blade body.

[0012] In a preferred embodiment, the outer frame of the air valve, the side sealing assembly, and the valve blades are all made of lightweight alloy material by bending and pressing, and the entire assembly is made of metal material, which is fireproof;

[0013] The blade body is composed of two bent plates assembled into a core-shaped structure with hexagonal and rhomboid cavities. The two bent plates are symmetrically distributed and welded together. The inner wall of the blade sleeve is welded to the high-convex part of the blade body.

[0014] In a preferred embodiment, the blade sleeve includes a sleeve shell, both ends of which are provided with inner folding plates. The included angle of the inner folding of the sleeve shell is set to 20-35°. Both the soft elastic sealing gasket and the connection between the sleeve shell and the steering shaft are provided with through holes. The soft elastic sealing gasket is a silicone gasket, a ceramic fiber gasket, or a rubber gasket. The soft elastic sealing gasket increases the tightness of contact between the inner wall of the sleeve shell and the side roughness of the blade body.

[0015] In a preferred embodiment, the fixed bracket is fixedly welded to the inner wall of the outer frame of the air valve, and multiple turning holes are evenly opened on the fixed bracket, and the valve blade is rotatably installed in the turning hole through the turning shaft.

[0016] In a preferred embodiment, the arc-shaped spring plate includes a sealing spring plate, which has a mounting hole adapted to the outer diameter of the steering shaft;

[0017] The mounting hole penetrates the sealing spring plate, and the width of the sealing spring plate is greater than the width of the fixed bracket.

[0018] In a preferred embodiment, a drive shaft is provided on one side of the steering shaft corresponding to the set of valve blades, the drive shaft passes through the side wall of the outer frame of the air valve, and a coupling is fixed between the drive shaft and the steering shaft. The drive shaft is externally connected to a handwheel, an electric, pneumatic or hydraulic drive device.

[0019] In a preferred embodiment, the steering shafts corresponding to adjacent valve blades are connected by a linkage structure or a variable pitch rod to achieve synchronous rotation of each valve blade.

[0020] The technical effects and advantages of this utility model are as follows:

[0021] This invention achieves a smooth sealing surface by setting rigid sealing shells A and B, which, together with the arc-shaped spring plate of the side sealing assembly and the blade sleeve, achieve continuous and uniform surface contact, eliminating air-leaking gaps and effectively eliminating tiny leakage channels between the blade tip and the valve frame. This improves sealing performance, reduces leakage channels, and enhances sealing reliability in the closed state. The blade body edge is wrapped by the blade sleeve, and the soft elastic sealing gasket compensates for defects such as uneven blade width and length, burrs on the blade, and uneven ends of the reinforcing ribs, further ensuring the stability of the valve's sealing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a side view of the overall structure of this utility model.

[0024] Figure 3 For the present utility model Figure 2 Enlarged view of the structure of section A in the middle.

[0025] Figure 4 This is a schematic diagram of the arc-shaped spring plate structure of this utility model.

[0026] Figure 5 This is a schematic diagram of the valve blade structure of this utility model.

[0027] Figure 6 This is a schematic diagram of the blade sleeve structure of this utility model.

[0028] The attached diagram is labeled as follows: 1. Outer frame of the damper; 2. Side sealing assembly; 3. Valve blade; 4. Drive shaft; 5. Coupling.

[0029] 21 Fixed bracket, 22 Arc-shaped spring plate;

[0030] 221 Sealing spring plate, 222 Mounting hole;

[0031] 31 Blade sleeve, 32 Steering shaft, 33 Blade body, 34 Mounting groove, 35 Rigid sealing shell A, 36 Rigid sealing shell B;

[0032] 311 Head shell, 312 Inner folding plate, 313 Soft elastic sealing gasket. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] This utility model provides, for example Figure 1 The sealing sleeve fitting for the air valve blade shown includes an air valve outer frame 1, with side sealing components 2 provided on the inner walls of both longitudinal sides of the air valve outer frame 1, and multiple valve blades 3 evenly arranged inside the air valve outer frame 1.

[0035] like Figure 2 By integrating the drive shaft 4, coupling 5, and synchronous linkage mechanism, the asynchronous rotation of the blades caused by manufacturing errors is effectively solved. The steering shaft 32 forms a mechanical connection through a linkage structure or a pitch rod, ensuring that all valve blades 3 maintain strict motion consistency during rotation. The side sealing assembly 2 can be understood as a structure used to achieve a seal between the end of the valve blade and the outer frame of the valve, which can be achieved in various ways. The fixed bracket 21 can be made of metal and fixed to the inner wall of the outer frame 1 of the valve by bolts, clips, or other connection methods. The movable setting of the arc-shaped spring plate 22 can be achieved through sliding fit, elastic snap-fit, etc., providing elastic deformation capability to adapt to small gaps.

[0036] like Figure 3-4 The side sealing assembly 2 includes a fixed bracket 21, and an arc-shaped spring plate 22 is movably provided on the outer side of the fixed bracket 21;

[0037] The sealing spring plate 221 is made of metal plates with elasticity and sealing function, such as stainless steel and aluminum alloy. It achieves a tight fit between the blade tip and the valve frame through elastic deformation, thereby improving the sealing effect. The sealing spring plate 221 is mechanically linked to the steering shaft 32 through the mounting hole 222, which ensures that the sealing spring plate 221 can rotate synchronously with the steering shaft 32 and be accurately positioned during the operation of the air valve. The sealing spring plate 221 has a certain floating ability in the axial direction to adapt to the slight irregular shape of the blade tip caused by manufacturing error, avoid stress concentration caused by rigid fixation, and thus maintain a stable sealing effect.

[0038] like Figure 5-6The valve blade 3 includes a blade body 33, a steering shaft 32 fixedly mounted in the middle of the blade body 33, and a blade sleeve 31 fixedly mounted on the outer side of the blade body 33. Both ends of the blade body 33 are provided with mounting grooves 34. A rigid sealing shell A 35 is installed in one mounting groove 34, and a rigid sealing shell B 36 is installed in the other mounting groove 34. The rigid sealing shell A 35 and the rigid sealing shell B 36 can be understood as components used to improve the sealing performance of the blade end, and are placed in the mounting groove 34 by an embedded installation method. The rigid sealing shell B 36 can be made of stamped metal and is also placed in the mounting groove 34 by embedded installation. When the valve blade 3 is closed, the rigid sealing shells A 35 and B 36 corresponding to the adjacent valve blade 3 come into contact, causing the rigid sealing shell B 36 to deform and shrink into the mounting groove 34, forming a flexible seal between the adjacent valve blades 3. During this period, the mounting groove 34 and the inner folding plate 312 are deformed by the change in the position of the rigid sealing shell B 36, generating a push force on the rigid sealing shell B 36, forming a rigid contact between the valve blades 3. The blade sleeve 31 enhances the overall rigidity of the blade body 33 and is fixed to the outside of the blade body 33 by welding.

[0039] Multiple valve blades 3, evenly arranged inside the outer frame 1 of the air valve, control airflow. Each valve blade 3 has mounting grooves 34 at both ends of its blade body 33. A rigid sealing shell A 35 is embedded in one mounting groove 34, and a rigid sealing shell B 36 is embedded in the other. The design of the rigid sealing shells A 35 and B 36 creates regular, flat sealing surfaces at both ends of the blade body 33, overcoming the defects of recesses or openings at the blade ends caused by the manufacturing process, and avoiding point contact or partial line contact problems. A fixed steering shaft 32 in the middle of the blade body 33 is used to achieve precise rotation control of the blade. When the air valve is closed, the flat surfaces of the rigid sealing shells A 35 and B 36 form continuous surface contact with the arc-shaped spring plate 22, effectively eliminating micro-leakage channels. Through the synergistic effect of the rigid sealing shells and the arc-shaped spring plate, the sealing failure problem caused by blade manufacturing errors and irregular ends is solved, achieving a highly efficient sealing effect at the air valve blade ends.

[0040] The T-shaped mounting base of the rigid sealing shell A 35 is designed to ensure the stability of the sealing shell A 35 within the mounting groove 34, preventing loosening due to vibration or impact. The "Ω"-shaped cross-section design of the rigid sealing shell B 36 provides moderate elastic deformation capability. This is achieved by using metal sheets of different thicknesses combined with stamping and bending processes, allowing it to actively fill end gaps and openings when the blade is closed. This significantly improves resistance to burr scratches and long-term durability, effectively solving the problem of incomplete sealing at the blade ends caused by manufacturing errors and structural defects. The fact that the widths of both rigid sealing shells A 35 and B 36 are equal to the width of the blade body 33 ensures that the seal covers the entire width of the blade, eliminating the risk of leakage caused by edge gaps. Simultaneously, it works in conjunction with the side sealing assembly 2 of the damper outer frame 1 to form a complete sealing loop, fundamentally improving the airtightness of the damper when closed.

[0041] The blade body 33 is constructed using bending and pressing techniques with aluminum alloy, magnesium alloy, or titanium alloy, avoiding dimensional deviations and surface burrs caused by traditional riveting processes. The hexagonal and rhomboid cavity structure is a reinforced structure designed based on the principle of geometric stress dispersion. The two symmetrically distributed bending plates are fixed by welding, effectively eliminating local stress concentration and ensuring balanced force distribution. The blade body 33 also employs a hexagonal and rhomboid cavity structure, abandoning the traditional method of local bending of reinforcing ribs, resulting in no recesses or openings at the ends and forming a continuous, flat sealing surface. The welding design between the blade sleeve 31 and the high-convex portion of the blade body 33 enhances the overall structural strength while maintaining the original flatness of the ends, allowing the blade to form a uniform surface contact with the arc-shaped spring plate 22 in the side sealing assembly 2, rather than point contact, effectively blocking leakage channels.

[0042] The inward bending of both ends of the sleeve shell 311 forms the inner folded plate 312, which enhances the sealing performance and adaptability of the blade tip. This allows the blade tip to dynamically adapt to the curvature change of the arc-shaped spring plate 22 when the air valve is closed, thereby achieving continuous and stable surface contact between the blade tip and the arc-shaped spring plate 22. A soft elastic sealing gasket 313 ensures tight contact between the sleeve shell 311 and the edge of the blade body 33, compensating for uneven blade widths and lengths, burrs on the blade, and unevenness at the end of the reinforcing rib.

[0043] The steering hole refers to the through-hole structure that provides a rotation fulcrum for the valve blade 3, so that the steering shaft 32 of each valve blade 3 can maintain strict geometric consistency.

[0044] By integrating a rigid sealing shell structure at the tip of the damper blade, combined with the elastic contact design of the side sealing assembly, the sealing failure caused by blade manufacturing errors and irregular tips is effectively addressed. Compared to existing technologies that rely on elastic sealing strips or curved springs, this method avoids point contact or localized line contact caused by blade tip recesses or opening defects, thus eliminating micro-leakage channels. Simultaneously, the elastic properties of the curved spring plate 22 compensate for blade length and squareness errors, ensuring a more uniform and reliable sealing effect.

[0045] Working principle: The outer frame 1 of the damper serves as the supporting foundation of the overall structure. The side sealing components 2 installed on the inner walls of its longitudinal sides are used to achieve the sealing function of the blade ends. The fixed bracket 21 in the side sealing component 2 is firmly connected to the inner wall of the outer frame 1 of the damper by welding, providing a mounting base for the arc-shaped spring plate 22. The arc-shaped spring plate 22 is movably set on the outside of the fixed bracket 21, and can generate elastic deformation when the blades are closed to adapt to the small gaps caused by manufacturing errors, thereby ensuring the continuity of the sealing contact.

[0046] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0047] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0048] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sealing sleeve fitting for a damper blade, comprising a damper outer frame (1), characterized in that: The outer frame (1) of the air valve is provided with side sealing components (2) on both longitudinal inner walls, and multiple valve blades (3) are evenly arranged inside the outer frame (1); The side sealing assembly (2) includes a fixed bracket (21), and an arc-shaped spring plate (22) is movably provided on the outside of the fixed bracket (21); The valve blade (3) includes a blade body (33), a steering shaft (32) is fixedly provided in the middle of the blade body (33), a blade sleeve (31) is fixedly provided on the outer side of the blade body (33), and a soft elastic sealing gasket (313) is provided on the inner wall of the blade sleeve (31) and the edge of the blade body (33). The blade body (33) has mounting grooves (34) at both ends. A rigid sealing shell A (35) is installed in one mounting groove (34), and a rigid sealing shell B (36) is installed in the other mounting groove (34).

2. The sealing sleeve fitting for the damper blade according to claim 1, characterized in that: The rigid sealing shell A (35) has a cross-section of a circular ring plus a T-shaped mounting seat, which is loaded in the mounting groove (34).

3. The sealing sleeve fitting for the damper blade according to claim 1, characterized in that: The outer frame (1), side sealing assembly (2), and valve blade (3) of the air valve are all made of lightweight alloy material by bending and pressing.

4. The sealing sleeve fitting for the damper blade according to claim 3, characterized in that: The blade sleeve assembly (31) includes a sleeve shell (311), both ends of which are provided with inner folding plates (312). The included angle of the inner folding of the sleeve shell (311) is set to 20-35°. The soft elastic sealing gasket (313) and the connection between the sleeve shell (311) and the steering shaft (32) are both provided with through holes. The soft elastic sealing gasket (313) is provided as a silicone gasket, a ceramic fiber gasket, or a rubber gasket.

5. The sealing sleeve fitting for the damper blade according to claim 1, characterized in that: The fixed bracket (21) is fixedly welded to the inner wall of the outer frame (1) of the air valve, and multiple turning holes are evenly opened on the fixed bracket (21). The valve blade (3) is rotatably installed in the turning hole through the turning shaft (32).

6. The sealing sleeve fitting for the damper blade according to claim 5, characterized in that: The arc-shaped spring plate (22) includes a sealing spring plate (221), on which a mounting hole (222) adapted to the outer diameter of the steering shaft (32) is provided; the mounting hole (222) penetrates the sealing spring plate (221), and the width of the sealing spring plate (221) is greater than the width of the fixed bracket (21).

7. The sealing sleeve fitting for the damper blade according to claim 1, characterized in that: A drive shaft (4) is provided on one side of the steering shaft (32) corresponding to a set of valve blades (3). The side wall of the outer frame (1) of the air valve is penetrated by the drive shaft (4), and a coupling (5) is fixed between the drive shaft (4) and the steering shaft (32).

8. The sealing sleeve fitting for the damper blade according to claim 1, characterized in that: The steering shafts (32) corresponding to adjacent valve blades (3) are connected by a linkage structure or a pitch rod.

9. The sealing sleeve fitting for the damper blade according to claim 2, characterized in that: The rigid sealing shell B (36) has an "Ω" shaped cross section and is formed by stamping and bending of metal sheet. The widths of the rigid sealing shell A (35) and the rigid sealing shell B (36) are equal to the width of the blade body (33).

10. The sealing sleeve fitting for the damper blade according to claim 3, characterized in that: The blade body (33) is composed of two bent plates forming a hexagonal and rhomboid cavity core. The two bent plates are symmetrically distributed and welded together. The inner wall of the blade sleeve (31) is welded to the high protrusion of the blade body (33).

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