Flange structure for quick alignment connection of air ducts

Abstract

The utility model discloses a kind of flange structures for air duct quick alignment connection, belong to air duct flange technical field, solve the technical problem of alignment difficult, unable to pre-fixing, installation cumbersome when existing air duct butt joint. Its technical scheme main point includes: already assembled air duct, air duct to be assembled and the flange assembly fixed in the end of both respectively, flange assembly is formed by four flange profiles by corner connecting piece insertion, and flange profile is equipped with insertion port and air duct connection;Positioning assembly is installed on the flange profile of already assembled air duct top, the connecting column of positioning assembly is cooperated with the V-shaped positioning groove of air duct to be assembled top and realizes quick alignment, rotating rod body is inserted after through insertion hole and is overturned to limit, cooperation limiting seat prevents loosening;Lower and both sides flange profile are fixed by fastening assembly I, and the flange profile of top is fixed by fastening assembly II. The utility model realizes air duct quick accurate alignment and pre-fixing, installation is convenient to disassemble, connection is stable and reliable sealing.

Description

Technical Field

[0001] This utility model belongs to the field of air duct flange technology, and in particular relates to a flange structure for quick alignment and connection of air ducts. Background Technology

[0002] As an important functional system in modern buildings, the volume of air duct systems in civil and public buildings is increasing. As an emerging technology in recent years, air duct lifting machines have begun to be used in engineering projects. However, when using air duct lifting machines to lift air ducts, due to the large lifting error of the air duct lifting machine, there is a large deviation between the lifted air duct and the installed air duct. The connection is time-consuming and laborious, and the deviation is not easy to adjust, which can easily exceed the requirements of the specifications.

[0003] Plug-in flanges form a frame structure by plugging in flange strips and angle brackets, and are then fixed with the aid of clips or bolts. Although this type of structure has strong adaptability, it is difficult to achieve quick and accurate alignment during docking, and pre-fixing is not possible. Therefore, we propose a flange structure for quick alignment connection of air ducts to solve the above-mentioned problems. Summary of the Invention

[0004] In view of this, in order to solve the above problems, this utility model provides a flange structure for quick alignment and connection of air ducts.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a flange structure for quick alignment and connection of air ducts, comprising a flange assembly fixedly installed at the opposite ends of an assembled air duct and an air duct to be assembled, and a positioning component disposed on one of the flange assemblies. The flange assembly includes four flange profiles, with two adjacent flange profiles being inserted together by corner connectors. One side of each flange profile is bent to form an insertion port for inserting and fixing the air duct. The positioning component is located on the flange profile at the top of the assembled air duct. The positioning component includes a connecting column and an abutting rib fixed to one end of the connecting column. A V-shaped positioning groove for the connecting column to be inserted is provided on the flange profile at the top of the air duct to be assembled. A guide slope is provided on the side of the abutting rib near the flange profile. When the connecting column is inserted into the V-shaped positioning groove, the centering effect of the V-shaped structure automatically calibrates the central axis of the two air ducts. The guide slope assists in docking guidance. The two corresponding flange profiles located at the bottom and sides are fixed by fastening assembly I, and the two corresponding flange profiles located at the top are fixed by another fastening assembly II.

[0006] As a further improvement to the above technical solution: The positioning component also includes a rectangular opening at one end of the connecting column and two rotating rods rotatably disposed within the rectangular opening. A plug-in hole is provided at one end of the flange profile located at the top of the assembled air duct, and the two rotating rods can pass through the plug-in hole. After positioning, the rotating rod is turned outward to rotate it to be perpendicular to the connecting column, thereby limiting the position of the connecting column.

[0007] The top of both the assembled air duct and the air duct to be assembled are fixed with a limiting seat. The limiting seat includes a supporting base plate and an arc-shaped limiting base plate welded to the top of the supporting base plate. The supporting base plate is located between the two rotating rods. When the rotating rod moves outward, the arc-shaped limiting plate limits the rotating rod.

[0008] The top of both the rotating rod and the connecting column has a limiting plane. The inner wall shape of the insertion hole is adapted to the limiting plane on the connecting column and the rotating rod to prevent the connecting column and the rotating rod from rotating within the insertion hole.

[0009] The top of the rotating rod is provided with a clearance groove. After positioning, the arc-shaped limiting plate corresponds to the clearance groove, providing clearance space for the rotating rod to flip.

[0010] Both the fastening assembly I and the fastening assembly II include an L-shaped clamp, a bolt that passes through and is threaded to one side of the clamp, and a bent portion formed by bending the other end of the clamp. The two flange profiles located at the top and the rotating rod are clamped between the bolts and the bends on the fastening assembly II, while the other two corresponding flange profiles are clamped between the bolts and the bends on the fastening assembly I.

[0011] A boss corresponding to the rotating rod is stamped on one side of the flange profile located at the top of the assembled air duct, and an abutting surface that cooperates with the boss is opened on the outer side of the rotating rod.

[0012] The clamp is made of stainless steel, and the end of the bolt is welded with an anti-slip pad.

[0013] The embodiments of this utility model have the following beneficial effects: 1. By using the V-shaped positioning groove of the positioning component to cooperate with the connecting column, the centering effect of the V-shaped structure can be used to quickly calibrate the center axis of the assembled air duct and the air duct to be assembled, avoiding the tedious operation of repeated adjustments when connecting traditional flanges; the guide slope of the contact rib further assists in the docking guidance, reducing jamming, and with the quick limit design of the rotating rod, the assembly time is significantly shortened, which is suitable for the high-efficiency construction needs of industrial ventilation, building air conditioning and other scenarios. 2. The rotating rod is limited by the arc-shaped limiting plate of the limiting seat. Combined with the fit between the boss and the contact surface, it can effectively prevent the rotating rod from deflecting or falling out due to vibration during the operation of the air duct, ensuring positioning stability. After the rotating rod rotates, it can cooperate with the contact rib to pre-fix the two flange profiles above. 3. The L-shaped clamps of the fastening components are used in conjunction with bolts to clamp the flange profile. The preload is applied evenly to the flange profile, reducing airflow leakage. The connection parts can adapt to normal working pressure and vibration environment, and the locking force remains stable to meet the needs of long-term use.

[0014] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a three-dimensional structural diagram of a flange structure for quick alignment and connection of air ducts according to the present invention. Figure 2 This is an exploded view of a flange assembly for a flange structure used for quick alignment and connection of air ducts according to the present invention. Figure 3 This is a schematic diagram of the flange profile and positioning component installation structure of a flange structure for quick alignment connection of air ducts according to this utility model; Figure 4 This is a schematic diagram of a fastening assembly structure for a flange structure used for quick alignment and connection of air ducts according to the present invention. Figure 5 for Figure 1 Enlarged structural diagram of section A in the middle; Figure 6 This is a schematic diagram of the limiting seat structure.

[0016] In the diagram: 1. Assembled air duct; 2. Air duct to be assembled; 3. Flange assembly; 31. Flange profile; 311. Insertion hole; 312. Boss; 32. Insertion port; 33. V-shaped positioning groove; 34. Corner connector; 4. Positioning assembly; 41. Connecting column; 42. Rectangular opening; 43. Abutting rib; 44. Guide slope; 45. Rotating rod; 46. Limiting plane; 47. Abutting plane; 48. Clearance groove; 5. Fastening assembly I; 6. Fastening assembly II; 7. Limiting seat; 71. Support base plate; 72. Arc-shaped limiting base plate; 8. Clamp; 9. Bolt; 10. Bending section. Detailed Implementation

[0017] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] Example 1: Please refer to Figures 1-6 This embodiment provides a flange structure for quick alignment and connection of air ducts, which is suitable for air duct docking scenarios in industrial ventilation, building air conditioning and other fields, such as ventilation duct assembly in factory workshops and air duct splicing in office building central air conditioning. It can realize quick positioning and stable connection between the assembled air duct 1 and the air duct 2 to be assembled, effectively improving installation efficiency and ensuring connection sealing.

[0019] The assembled duct 1 and the duct to be assembled 2 are rectangular ducts of the same specification. Flange assemblies 3 are riveted to the edges of their adjacent ends, and a sealing gasket is sandwiched between the mating surfaces of the two flange assemblies 3. The flange assembly 3 is composed of four flange profiles 31 spliced ​​together. The flange profiles 31 are made of Q235B galvanized steel sheet, stamped and formed. The edges after stamping are ground to avoid burrs affecting assembly. One side is bent to form a plug-in port 32. The plug-in port 32 is tightly fitted to the outer wall of the duct end and fixed with rivets. The rivets are evenly distributed along the edge of the plug-in port 32 to ensure the firmness of the connection between the flange profile 31 and the duct, preventing loosening due to airflow impact. The ends of two adjacent flange profiles 31 are connected to the same corner connector 34. The corner connector 34 is an L-shaped structure, made of aluminum alloy in one piece, which is lightweight and high-strength. Its two right-angled sides are respectively inserted into the slots preset at the ends of the adjacent flange profiles 31. The inner wall of the slot is provided with fine anti-slip texture to enhance the fit between the corner connector 34 and the flange profile 31, so as to achieve precise splicing of the four flange profiles 31 and form a frame structure that is compatible with the end face of the air duct.

[0020] A positioning assembly 4 is installed on the flange profile 31 at the top of the assembled air duct 1. The core component of the positioning assembly 4 is the connecting column 41, which is a cylindrical structure made of No. 45 steel and machined. The surface is polished to make it smooth and reduce frictional resistance during assembly. An abutment rib 43 is welded to one end. The abutment rib 43 is a long strip of steel plate, which is set perpendicular to the connecting column 41. The weld joint is treated to ensure a strong weld and improve the connection strength. A guide slope 44 is machined on one side of the abutment rib 43, which can play a guiding role during the docking process to prevent the abutment rib 43 from getting stuck with the flange profile 31, making the docking process smoother. The flange profile 31 at the top of the air duct 2 to be assembled has a V-shaped positioning groove 33. The inner wall of the V-shaped positioning groove 33 is polished to reduce contact friction with the connecting column 41. The end of the connecting column 41 away from the abutting rib 43 can be embedded in the V-shaped positioning groove 33. Through the centering effect of the V-shaped structure, the central axis of the assembled air duct 1 and the air duct 2 to be assembled can be quickly aligned to achieve rapid alignment.

[0021] A rectangular opening 42 is provided at the end of the connecting column 41 away from the contacting rib 43. The rectangular opening 42 penetrates the side wall of the connecting column 41, and the edges of the opening are chamfered. Two rotating rods 45 are rotatably mounted inside the rectangular opening 42 via pins. The two ends of the pins are fixed by retaining springs to prevent the pins from falling off and affecting the rotation. The rotating rods 45 are semi-cylindrical steel rods that can rotate freely around the pins within the rectangular opening 42 without noticeable jamming during rotation. The flange profile 31 at the top of the assembled air duct 1 has a plug hole 311 at one end. The plug hole 311 is a through hole. When the two rotating rods 45 are brought together, they can pass smoothly through the plug hole 311. After the connecting column 41 is embedded in the V-shaped positioning groove 33 and completed the positioning, the rotating rod 45 is pulled outward to make it rotate around the pin. The end of the rotating rod 45 abuts against the side of the flange profile 31 to limit the connecting column 41 and prevent the connecting column 41 from coming out of the V-shaped positioning groove 33, thus ensuring the stability of the connection.

[0022] Both the assembled air duct 1 and the air duct 2 to be assembled have a limiting seat 7 fixed to their tops by welding. The limiting seat 7 includes a support base plate 71, which is a rectangular steel plate vertically welded to the top of the air duct and located between the two rotating rods 45. An arc-shaped limiting base plate 72 is welded to the top of the support base plate 71 using a full welding process to improve structural strength and prevent it from falling off due to vibration during air duct operation. The arc-shaped limiting base plate 72 has a semi-circular arc structure. When the rotating rod 45 rotates to the limiting position, the inner wall of the arc-shaped limiting base plate 72 fits tightly against the outer wall of the rotating rod 45, limiting the rotation of the rotating rod 45 and preventing it from rotating and affecting its movement within the insertion hole 311.

[0023] Both the top of the rotating rod 45 and the connecting column 41 are machined with limiting planes 46. The limiting planes 46 are flat planar structures, and the inner wall of the insertion hole 311 is a planar structure adapted to the limiting planes 46. When the rotating rod 45 is closed and inserted into the insertion hole 311, the limiting planes 46 and the inner wall of the insertion hole 311 fit tightly together, preventing the rotating rod 45 and the connecting column 41 from rotating within the insertion hole 311 and ensuring positioning accuracy. The top of the rotating rod 45 is also provided with a clearance groove 48, which corresponds to the arc-shaped limiting base plate 72. When it is necessary to flip the rotating rod 45 to unlock, the clearance groove 48 can provide sufficient clearance space for the arc-shaped limiting base plate 72, allowing the rotating rod 45 to rotate smoothly to the closed state, facilitating disassembly.

[0024] Two corresponding flange profiles 31 located below and on both sides of the assembled air duct 1 and the air duct 2 to be assembled are fixed by fastening assembly I5, and two corresponding flange profiles 31 at the top are fixed by fastening assembly II6. Fastening assemblies I5 and II6 have identical structures, both including clamps 8, bolts 9, and bends 10. Clamp 8 is an L-shaped steel plate made of stainless steel, which is corrosion-resistant and has high strength. It has a threaded hole on one side, through which bolts 9 are inserted. Anti-slip washers made of rubber are welded to the ends of bolts 9, which can increase friction and provide a certain degree of sealing. The other end of clamp 8 is bent to form bend 10, which forms an angle with the main body of clamp 8. Its end face is ground flat and fits tightly against the side of the flange profile 31. In use, the bent part 10 of the clamp 8 is attached to the outer wall of one flange profile 31, and the bolt 9 is rotated so that its end abuts against the outer wall of the other flange profile 31. Tightening the bolt 9 will clamp and fix the two flange profiles 31. For the two flange profiles 31 at the top, the bent part 10 of the clamp 8 and the bolt 9 are located on the outside of the two flange profiles 31 respectively, and the rotating rod 45 is located between the bolt 9 and the bent part 10. During the clamping process, the preload of the bolt 9 can act on the flange profile 31 and the rotating rod 45 at the same time, further improving the stability of the connection and preventing loosening caused by vibration.

[0025] A boss 312 is stamped on one side of the flange profile 31 located at the top of the assembled air duct 1. The one-time stamping process ensures dimensional consistency and structural strength. The outer side of the rotating rod 45 is machined with an abutment surface 47 that mates with the boss 312. The abutment surface 47 is flattened. When the rotating rod 45 rotates to the limit position, the abutment surface 47 abuts against the end face of the boss 312. The boss 312 allows a reasonable distance to be formed between the rotating rod 45 and the side wall of the flange profile 31 to form a lever, preventing the rotating rod 45 from being overly fitted with the flange profile 31, which would reduce the clamping effect on the upper flange profile 31.

[0026] The assembly process of this embodiment is as follows: First, four flange profiles 31 are spliced ​​together to form a flange assembly 3 using corner connectors 34. After the corner connectors 34 are inserted, they can be fixed by temporary clips to facilitate subsequent rivet fixing operations. Then, the flange assembly 3 is fixed to the ends of the assembled air duct 1 and the air duct 2 to be assembled respectively through the insertion ports 32. After the rotating rod 45 of the positioning component 4 is brought together, it is inserted into the insertion hole 311 of the top flange profile 31 of the assembled air duct 1. The air duct 2 to be assembled is pushed upward toward the assembled air duct 1, so that the connecting column 41 can be smoothly embedded into the V-shape of the top flange profile 31 of the air duct 2 to be assembled. Position the groove 33, then pull the connecting column 41 to one side. During this process, the guide slope 44 of the abutting rib 43 fits against the side wall of the flange profile 31 for guidance, achieving quick alignment. Move the rotating rod 45 outward to be perpendicular to the connecting column 41. At this time, the arc-shaped limiting plate 72 corresponds to the clearance groove 48 of the rotating rod 45. Flip the rotating rod 45 so that the abutting plane 47 abuts against the boss 312, forming a lever. Finally, put the clamps 8 of the fastening component I5 and the fastening component II6 on the outside of the two flange profiles 31 at the corresponding positions, and tighten the bolts 9 to achieve clamping and fixing.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A flange structure for quick alignment and connection of air ducts, characterized in that, It includes a flange assembly (3) fixedly installed at the opposite ends of the assembled air duct (1) and the air duct to be assembled (2) and a positioning assembly (4) provided on one of the flange assemblies (3). The flange assembly (3) includes four flange profiles (31), two adjacent flange profiles (31) are connected by corner connectors (34), and one side of the flange profile (31) is bent to form a plug-in port (32) for plugging and fixing the air duct. The positioning component (4) is located on the flange profile (31) at the top of the assembled air duct (1). The positioning component (4) includes a connecting column (41) and an abutting rib (43) fixed to one end of the connecting column (41). A V-shaped positioning groove (33) for the connecting column (41) to be inserted is provided on the flange profile (31) at the top of the air duct (2) to be assembled. A guide slope (44) is provided on the side of the abutting rib (43) near the flange profile (31). When the connecting column (41) is inserted into the V-shaped positioning groove (33), the center axis of the two air ducts is automatically calibrated by the centering effect of the V-shaped structure on the V-shaped positioning groove (33). The guide slope (44) assists in docking guidance. The two corresponding flange profiles (31) located below and on both sides are fixed by fastening assembly I (5), and the two corresponding flange profiles (31) located above are fixed by fastening assembly II (6).

2. The flange structure according to claim 1, characterized in that, The positioning component (4) also includes a rectangular opening (42) at one end of the connecting column (41) and two rotating rods (45) rotatably disposed in the rectangular opening (42). A plug hole (311) is provided at one end of the flange profile (31) located at the top of the assembled air duct (1), and the two rotating rods (45) can pass through the plug hole (311). After positioning, the rotating rod (45) is pulled outward to rotate it to be perpendicular to the connecting column (41) in order to limit the connecting column (41).

3. The flange structure according to claim 2, characterized in that, The top of both the assembled air duct (1) and the air duct to be assembled (2) are fixed with a limiting seat (7). The limiting seat (7) includes a supporting base plate (71) and an arc-shaped limiting base plate (72) welded to the top of the supporting base plate (71). The supporting base plate (71) is located between the two rotating rods (45). When the rotating rod (45) moves outward, the arc-shaped limiting plate (72) limits the rotating rod (45).

4. The flange structure according to claim 3, characterized in that, The top of both the rotating rod (45) and the connecting column (41) has a limiting plane (46). The inner wall shape of the insertion hole (311) is adapted to the limiting plane (46) on the connecting column (41) and the rotating rod (45) to prevent the connecting column (41) and the rotating rod (45) from rotating in the insertion hole (311).

5. The flange structure according to claim 3, characterized in that, The top of the rotating rod (45) is provided with a clearance groove (48). After positioning, the arc-shaped limiting base plate (72) corresponds to the clearance groove (48), providing clearance space for the rotating rod (45) to flip.

6. The flange structure according to claim 2, characterized in that, Both the fastening assembly I (5) and the fastening assembly II (6) include an L-shaped clamp (8), a bolt (9) that passes through and is threaded to one side of the clamp (8), and a bent portion (10) formed by bending the other end of the clamp (8). The two flange profiles (31) located above and the rotating rod (45) are clamped between the bolts (9) and the bend (10) on the fastening assembly II (6), and the other two corresponding flange profiles (31) are clamped between the bolts (9) and the bend (10) on the fastening assembly I (5).

7. The flange structure according to claim 6, characterized in that, A boss (312) corresponding to the rotating rod (45) is stamped on one side of the flange profile (31) at the top of the assembled air duct (1). A contact surface (47) that cooperates with the boss (312) is provided on the outer side of the rotating rod (45).

8. The flange structure according to claim 7, characterized in that, The clamp (8) is made of stainless steel, and the end of the bolt (9) is welded with an anti-slip pad.

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