Metal duct pre-installation structure

Abstract

This application discloses a prefabricated installation structure for metal ducts, belonging to the technical field of pipe connection structures. It provides a prefabricated installation structure for ducts with better connection flatness, including a bridging component connecting adjacent ducts. The bridging component includes an inner frame and an outer frame. A narrowing frame is provided between the outer wall of the inner frame and the inner wall of the outer frame. Embedded grooves are formed between the two end faces of the narrowing frame and the outer walls of the inner and outer frames. A pressing component is fixedly connected to a pair of opposing outer sides of the outer frame. The duct has an outwardly extending side plate on the side perpendicular to the pressing component. A snap-fit ​​component is fixedly connected to the outer frame on the side perpendicular to the pressing component. This invention, by providing a pressing component structure on opposing sides and applying pre-pressure, can better keep adjacent ducts in the same extension direction. Combined with the bridging component embedded in the duct end structure, the connection ends of the duct units can be kept flush, effectively reducing the light transmission probability at the connection point and effectively improving airtightness.

Description

Technical Field

[0001] This application relates to the field of pipe connection structure technology, and in particular to a prefabricated installation structure for metal air ducts. Background Technology

[0002] Air ducts serve to maintain fresh air, achieve ventilation, reduce indoor temperature, and reduce environmental pollution. Therefore, for buildings with a large depth, the internal installation of air ducts is very important. Long and large air ducts are difficult to transport, so metal air ducts are usually divided into multiple small sections and then connected using installation structures. However, due to the large end faces of the air ducts, although existing installation structures can achieve the connection, pre-fabricated air ducts are not easy to align during connection for various reasons. This may result in unevenness of the duct unit in the extension direction, leading to poor light leakage and air tightness. Furthermore, the traditional connection method uses connectors to directly connect the ends of the air duct unit, which can easily damage the structural integrity of the end of the air duct unit. Once the end of the air duct unit is damaged, its air tightness will be greatly reduced, affecting the air supply efficiency. Summary of the Invention

[0003] The purpose of this application is to provide a prefabricated installation structure for metal ducts with better connection flatness.

[0004] To achieve the above objectives, this application provides a prefabricated installation structure for metal ducts: including a bridging component connecting adjacent duct bodies, the bridging component including an inner frame and an outer frame, a narrowing frame between the outer wall of the inner frame and the inner wall of the outer frame, an embedded groove formed between the two end faces of the narrowing frame and the outer wall of the inner frame and the inner wall of the outer frame, the end of the duct body having an embedded edge adapted to be embedded in the embedded groove, the outer frame having a pressing component fixedly connected to a pair of opposite outer sides, adapted to press tightly against the outer surface of the duct body, the duct body having an outwardly extending side clamping plate on the side perpendicular to the pressing component, the outer frame having a snap-fit ​​component fixedly connected to the side clamping plate on the side perpendicular to the pressing component, adapted to restrict the adjacent side clamping plates and prevent the connected duct bodies from being pulled off.

[0005] As a preferred embodiment, the inner frame has an arc-shaped cross-section, with a flat outer wall and an arc-shaped inner wall. The thickness of the inner frame gradually decreases from the middle to both ends to reduce turbulence inside the tank, thereby reducing flow resistance and noise.

[0006] As a preferred embodiment, the distance between the two ends of the inner frame is greater than the distance between the two ends of the outer frame, and the thickness of the material at both ends of the inner frame is zero, so that the gas can pass smoothly through the inner wall of the inner frame.

[0007] As a preferred embodiment, the bridging member has insert plates in opposite recesses, the two recesses are located on symmetrical sides of the tube end, and the tube end has a relief groove between the two recesses, adapted to fit with the insert plates, further improving the engagement of the connection surfaces.

[0008] As a preferred embodiment, the end of the tube has an end flange that transitions from the inner edge to the relief groove. The end face of the end flange is flush with the end face of the inner edge, and is suitable for embedding into the inner groove portion parallel to the insert plate, thereby improving the frame deformation capability of the tube end.

[0009] As a preferred embodiment, the side plate is located on the edge of the relief groove and is formed by cutting and stamping the material at the relief groove, which is simple to process and has good material uniformity and stability.

[0010] As a preferred embodiment, the crimping component includes a buckle plate, and the buckle plate has a pair of pressure plates on the same side, which are adapted to be tightly attached to the front and rear end faces of the outer frame respectively. The outer side of the outer frame is provided with a first blind hole, and the buckle plate is provided with a first through hole corresponding to the first blind hole. The buckle plate is fixedly connected to the outer frame by a first bolt passing through the first through hole and engaging with the first blind hole, which ensures the pressure applied by the crimping component to the tube body and makes it easier to keep the tube bodies flush.

[0011] As a preferred embodiment, the buckle plate has a reinforcing frame on the side facing away from the pressure plate, and all the first through holes are located within the reinforcing frame. The pressure plate has a friction pad on the side facing the tube body to prevent the pressing component from making hard contact with the tube body, which is also made of metal, and to a certain extent, it can suppress movement and absorb vibration.

[0012] As a preferred embodiment, the snap-fit ​​component includes a slide plate, on the same side of which has a pair of inner snap plates adapted to be tightly fitted to the front and rear end faces of the outer frame respectively. On the same side of the slide plate, there is also an outer snap plate that frames the two inner snap plates. A groove is formed between the outer snap plate, the inner snap plates and the slide plate, adapted to fit with the side snap plates, suppressing the relative displacement of adjacent side snap plates, and absorbing and dispersing the bending stress that the side snap plates may be subjected to.

[0013] As a preferred embodiment, the outer side of the outer frame is provided with a second blind hole, and the slide plate is provided with a second through hole corresponding to the second blind hole. The slide plate is fixedly connected to the outer frame by a second bolt passing through the second through hole and engaging with the second blind hole. The two ends of the slide plate have ribs facing away from the slide groove, which improves the slide plate's resistance to bending deformation.

[0014] Compared with the prior art, the beneficial effects of this application are as follows:

[0015] (1) By setting a crimping structure on the opposite side, the pre-pressure applied can better keep the connected adjacent pipes in the same extension direction. With the bridging component embedded in the pipe end, the connection end of the pipe unit can be kept flush, the light transmission probability at the connection is effectively reduced, and the airtightness is effectively improved.

[0016] (2) By setting a snap-fit ​​structure on the other side, the stress on the pipe fitting connection unit at the connection end can be effectively dispersed. Compared with using the connector directly at the end of the duct unit, this method can effectively avoid stress concentration in the duct connection part and better maintain the structural stability of the metal duct. Attached Figure Description

[0017] Figure 1 A three-dimensional structural diagram of the assembled state of the prefabricated metal duct installation structure;

[0018] Figure 2 A three-dimensional sectional view of the assembled structure of the prefabricated metal duct;

[0019] Figure 3 For the prefabricated installation structure of the metal duct Figure 2 A magnified view of part A;

[0020] Figure 4 A three-dimensional sectional view of the connection between the two pipe bodies in the prefabricated installation structure of the metal duct;

[0021] Figure 5 For the prefabricated installation structure of the metal duct Figure 4 A magnified view of section B;

[0022] Figure 6 A three-dimensional structural diagram of the prefabricated installation structure of the metal duct, showing the connection at one end of the duct body.

[0023] Figure 7 A cross-sectional view of the connection status of the crimping and snap-fit ​​components of the prefabricated metal duct installation structure on the bridging component;

[0024] Figure 8 A cross-sectional view showing the configuration of the crimping and snap-fit ​​components of the prefabricated metal duct installation structure on the bridging component;

[0025] Figure 9 For the prefabricated installation structure of the metal duct Figure 8 A magnified view of a portion at point C;

[0026] Figure 10 For the prefabricated installation structure of the metal duct Figure 8 A magnified view of a portion at point D;

[0027] Figure 11A three-dimensional structural diagram of the bridging component for the prefabricated installation structure of the metal duct;

[0028] Figure 12 A three-dimensional sectional view of the bridging component of the prefabricated installation structure of the metal duct;

[0029] Figure 13 For the prefabricated installation structure of the metal duct Figure 12 A magnified view of a portion at point E;

[0030] Figure 14 First perspective view of the three-dimensional structure of the crimping component of the prefabricated installation structure of the metal duct;

[0031] Figure 15 A second perspective view of the crimping component of the prefabricated metal duct installation structure;

[0032] Figure 16 A three-dimensional structural diagram of the snap-fit ​​components for the prefabricated installation structure of the metal duct;

[0033] Figure 17 A three-dimensional sectional view of the snap-fit ​​components of the prefabricated installation structure of the metal duct;

[0034] Figure 18 This is a three-dimensional sectional view of the duct body of the prefabricated metal duct installation structure.

[0035] In the diagram: 1. Tube body; 101. Inner flange; 102. End flange; 103. Relief groove; 104. Side retaining plate; 2. Bridging component; 201. Inner frame; 202. Outer frame; 203. Narrowing frame; 204. Inner groove; 205. First blind hole; 206. Second blind hole; 207. Insert plate; 3. Pressing component; 301. Buckle plate; 302. Pressure plate; 303. Reinforcing frame; 304. First through hole; 305. Friction pad; 4. Snap-fit ​​component; 401. Slide plate; 402. Inner retaining plate; 403. Outer retaining plate; 404. Slide groove; 405. Rib plate; 406. Second through hole; 5. First bolt; 6. Second bolt. Detailed Implementation

[0036] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0037] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0038] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0039] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0040] like Figure 1-18The prefabricated metal duct installation structure shown includes a bridging component 2 connecting adjacent duct bodies 1. The adjacent duct bodies 1 connected by the bridging component 2 are typically cuboid in shape; therefore, the bridging component 2 is also rectangular, specifically a rectangular frame. The bridging component 2 includes an inner frame 201 and an outer frame 202. The cross-section of the inner frame 201 is arc-shaped, with a flat outer wall and an arc-shaped inner wall. In essence, the thickness of the inner frame 201 gradually decreases from the middle to both ends along an arc. In this embodiment, the inner frame 201 is designed to be at an extreme, with zero thickness at both ends. This effectively reduces turbulence generated when fluid flows through the inner wall of the inner frame 201, thereby reducing fluid transport resistance and noise. The distance between the two ends of the inner frame 201 needs to be greater than the distance between the two ends of the outer frame 202; that is, the width of the inner frame 201 along the fluid flow direction must be greater than the width of the outer frame 202 along the fluid flow direction. The width of the fluid flow direction, and in order to ensure that the bridging component 2 has no directional difference during installation, the bridging component 2 also needs to have a symmetrical structure, that is, the outer frame 202 is located in the center of the inner frame 201 in the front-back direction. There is a narrowing frame 203 between the outer wall of the inner frame 201 and the inner wall of the outer frame 202. The distance between the front and back ends of the narrowing frame 203 is smaller than that of the outer frame 202. It mainly serves to support the inner frame 201 and the outer frame 202 and maintain the distance between them. At the same time, the bridging component 2 has an I-shaped structure in cross section, thereby effectively improving its structural strength and resisting deformation. There are two embedded grooves 204 between the two ends of the narrowing frame 203 and the outer wall of the inner frame 201 and the inner wall of the outer frame 202. There are two embedded grooves 204, which are symmetrically arranged front and back. The end of the pipe body 1 has an embedded edge 101, which is embedded into the embedded groove 204, thereby achieving pre-connection.

[0041] The bridging component 2 has insert plates 207 in opposite recesses 204. The insert plates 207 can protrude from the end face of the outer frame 202, but must not exceed the end edge of the inner frame 201. Two recessed edges 101 are located on symmetrical sides of the end of the tube body 1, either vertically or horizontally symmetrical, and only one of them can be symmetrical. The end of the tube body 1 has a relief groove 103 located between the two recessed edges 101, the direction of which must correspond to the insert plate 207 to ensure a proper fit and a continuous connection structure. The end of the tube body 1 has an end flange 102 that transitions from the recessed edge 101 to the relief groove 103. 02 is perpendicular to the inner edge 101 and is the part of the inner edge 101 that extends vertically. Therefore, the end face of the end vertical edge 102 is naturally flush with the end face of the inner edge 101 and fits into the inner groove 204 that is parallel to the insert plate 207. The inner edge 101 and the end vertical edge 102 provide mutual support, thereby ensuring the ability of the end of the tube body 1 to resist bending deformation. The side clamping plate 104 is located on the side of the relief groove 103. In fact, it is made by cutting and stamping the material at the relief groove 103. Therefore, the entire tube body 1 is an integral structure, which is convenient for processing and forming, and the material is uniform and the structure is stable.

[0042] The outer frame 202 has a pair of pressing pieces 3 fixedly connected to its opposite outer surfaces. These pressing pieces 3 are used to press the outer surface of the tube body 1 tightly against the outer wall of the inner frame 201. The pressing piece 3 has a flat snap plate 301. On the same side of the snap plate 301, there is a pair of pressure plates 302, which can be pressed against the front and rear end faces of the outer frame 202 respectively. The outer surface of the outer frame 202 has a first blind hole 205. The snap plate 301 has a first through hole 304 corresponding to the first blind hole 205. There are several first through holes 304 and first blind holes 205, which are evenly arranged. The snap plate 301 passes through the first through hole 304 and cooperates with the first blind hole 205. The first bolt 5 is fixedly connected to the outer frame 202. The side of the buckle plate 301 facing away from the pressure plate 302 has a reinforcing frame 303, which can improve the bending resistance of the buckle plate 301. All the first through holes 304 are located inside the reinforcing frame 303. After tightening, the upper end face of the first bolt 5 can be flush with the end face of the reinforcing frame 303. In order to facilitate the rotation of the first bolt 5, the first bolt 5 is usually an internal hex bolt. The pressure plate 302 is provided with a friction pad 305 on the side facing the tube 1. The friction pad 305 is supported by a soft and elastic rubber material, which takes into account both high wear resistance and friction coefficient, and can effectively suppress the possible shaking and movement of the end of the connected tube 1.

[0043] The tube body 1 has an outwardly extending side clamping plate 104 on the side perpendicular to the crimping member 3. The outer frame 202 is fixedly connected to a clamping member 4 on the side perpendicular to the crimping member 3 to limit the distance between adjacent side clamping plates 104, preventing the connected tube body 1 from being separated by tensile force along the extension direction. Furthermore, the long, straight side clamping plate 104 can disperse lateral bending stress, thus improving the structural strength and stability of the tube body 1 connection. The clamping member 4 specifically includes a sliding plate 401. On the same side of the sliding plate 401, there is a pair of inner clamping plates 402. The two inner clamping plates 402 are parallel to each other and are used to respectively adhere to the front and rear end faces of the outer frame 202. On the same side of the sliding plate 401, there is also an outer clamping plate 403 that frames the two inner clamping plates 402. The side of the outer clamping plate 403 facing the outside of the tube body 1 is flush with the inner clamping plates 402. A connection is formed between the outer clamping plate 403, the inner clamping plates 402, and the sliding plate 401. There is a groove 404 that fits perfectly with the side plate 104. There will be a certain gap between the inner wall and the groove to provide buffer space for thermal expansion and contraction. However, the gap is very small and will not affect the stability of the tube body 1 after connection. Similarly, the outer side of the outer frame 202 is also provided with a second blind hole 206, but it will not be provided on the side where the first blind hole 205 is provided. The slide plate 401 will also be provided with a second through hole 406 corresponding to the second blind hole 206. The number is not limited, but at least one is required. Moreover, no matter how many there are, it is best to arrange them evenly and symmetrically. The slide plate 401 is fixedly connected to the outer frame 202 by the second bolt 6 that passes through the second through hole 406 and cooperates with the second blind hole 206. Under normal circumstances, the two ends of the slide plate 401 have ribs 405 facing away from the groove 404. This makes the straight slide plate 401 less likely to bend due to force in the length and width directions.

[0044] Working principle: Before installation, first determine whether the duct is subjected to more vertical or horizontal swaying forces in the installation environment. If the vertical swaying force is greater, the side clamping plate 104 of the duct body 1 needs to be in a vertical position to share the vertical swaying bending stress. If the horizontal swaying force is greater, the side clamping plate 104 of the duct body 1 needs to be in a horizontal position to share the horizontal swaying bending stress. During installation, first fix one pipe body 1. Take the bridging component 2 and use the embedded groove 204 to fasten it onto the inner edge 101 of the exposed end of the pipe body 1. The insert plate 207 in the embedded groove 204 naturally fits into the relief groove 103 of the pipe body 1. Then take another pipe body 1 and fasten it onto the other open end of the bridging component 2. Use the snap fastener 4 to constrain the adjacent side snap plates 104 of the two pipe bodies 1 together and use the second bolt 6 for pre-fixing. Then the other opposite side is also fixed using the side snap plates 104. Finally, use the first bolt 5 to fix the crimping component 3 to the bridging component 2 in the vertical direction. The symmetrical pressure plate 302 can use the elastic friction pad 305 to press the two pipe bodies 1 very flat. Therefore, with the embedded structure, this prefabricated installation structure can make the metal duct have a high sealing performance at the connection and can easily pass the light transmission test.

[0045] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A prefabricated installation structure for metal ducts, characterized in that: The system includes a bridging component (2) connecting adjacent pipe bodies (1). The bridging component (2) includes an inner frame (201) and an outer frame (202). A narrowing frame (203) is provided between the outer wall of the inner frame (201) and the inner wall of the outer frame (202). An embedded groove (204) is formed between the two end faces of the narrowing frame (203) and the outer wall of the inner frame (201) and the inner wall of the outer frame (202). The end of the pipe body (1) has an embedded edge (101) suitable for embedding into the embedded edge. Inside the groove (204), the outer frame (202) is fixedly connected to a pair of opposing outer surfaces with pressing members (3), which are suitable for pressing the outer surface of the tube body (1). The pressing member (3) includes a buckle plate (301). The buckle plate (301) has a pair of pressure plates (302) on the same side, which are suitable for respectively sticking to the front and rear end faces of the outer frame (202). The outer surface of the outer frame (202) is provided with a first blind hole (205). The buckle plate (301) is provided with a corresponding hole. (205) Corresponding to the first through hole (304), the buckle plate (301) is fixedly connected to the outer frame (202) by a first bolt (5) passing through the first through hole (304) and cooperating with the first blind hole (205); the tube body (1) has an outwardly extending side plate (104) on the side perpendicular to the crimping member (3), and the outer frame (202) is fixedly connected to a snap-fit ​​member (4) on the side perpendicular to the crimping member (3), which is suitable for restricting the adjacent side plates ( 104), the snap-fit ​​component (4) includes a slide plate (401), the slide plate (401) has a pair of inner snap plates (402) on the same side, which are adapted to be close to the front and rear end faces of the outer frame (202) respectively, and the slide plate (401) also has an outer snap plate (403) on the same side to frame the two inner snap plates (402), and a groove (404) is formed between the outer snap plate (403), the inner snap plates (402) and the slide plate (401), which is adapted to fit with the side snap plate (104).

2. The prefabricated installation structure for metal ducts as described in claim 1, characterized in that: The cross-section of the inner frame (201) is arc-shaped. The outer wall of the inner frame (201) is flat and the inner wall is curved. The thickness of the inner frame (201) gradually decreases from the middle to both ends.

3. The prefabricated installation structure for metal ducts as described in claim 2, characterized in that: The distance between the two ends of the inner frame (201) is greater than the distance between the two ends of the outer frame (202), and the thickness of the material at both ends of the inner frame (201) is zero.

4. The prefabricated installation structure for metal ducts as described in claim 3, characterized in that: The bridging member (2) has insert plates (207) in opposite recesses (204), the two recesses (101) are located on symmetrical sides of the end of the tube (1), and the end of the tube (1) has a relief groove (103) located between the two recesses (101) for fitting with the insert plates (207).

5. The prefabricated installation structure for metal ducts as described in claim 4, characterized in that: The end of the tube (1) has an end flange (102) that transitions from the inner edge (101) to the relief groove (103), the end face of the end flange (102) being flush with the end face of the inner edge (101) and suitable for being inserted into the portion of the inner groove (204) parallel to the insert plate (207).

6. The prefabricated installation structure for metal ducts as described in claim 5, characterized in that: The side plate (104) is located on the side of the relief groove (103) and is formed by cutting and stamping the material at the relief groove (103).

7. The prefabricated installation structure for metal ducts as described in any one of claims 1 to 6, characterized in that: The buckle plate (301) has a reinforcing frame (303) on the side facing away from the pressure plate (302), and all the first through holes (304) are located inside the reinforcing frame (303). The pressure plate (302) has a friction pad (305) on the side facing the tube body (1).

8. The prefabricated installation structure for metal ducts as described in any one of claims 1 to 6, characterized in that: The outer frame (202) has a second blind hole (206) on its outer side, and the slide plate (401) has a second through hole (406) corresponding to the second blind hole (206). The slide plate (401) is fixedly connected to the outer frame (202) by a second bolt (6) that passes through the second through hole (406) and cooperates with the second blind hole (206). The two ends of the slide plate (401) have ribs (405) facing away from the slide groove (404).

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