Composite air pipe connecting structure

Abstract

The utility model discloses a composite air pipe connecting structure which comprises two composite plates in right-angle butt joint, a blocking bending portion is arranged on a butt joint port of the composite plates, an embedded section bar is fixed through the blocking bending portion, a dovetail sliding groove is formed in the embedded section bar, and the dovetail sliding groove is connected with the dovetail sliding groove. The clamping strips are inserted and fixed together through the dovetail sliding grooves of the embedded profiles on the two adjacent composite boards which are arranged in a right-angle butt joint mode; and an inner side plugging strip and an outer side plugging strip are arranged at the edge of the butt joint of the two composite plates. According to the utility model, the composite boards of the right-angle butt joint structure are connected into an integral structure by adopting the insertion structure of the dovetail chutes and the clamping strips, and the inside and the outside are sealed by the inner side plugging strips and the outer side plugging strips, so that the phenomena of cold bridge, surface dew formation, air leakage and the like at the right-angle joints of the composite boards can be effectively avoided; the compactness, fire resistance, heat insulation performance and fire resistance limit of the right-angle joint of the composite heat preservation air pipe or the air conditioner box are improved, and efficient operation of a ventilation and air conditioning system is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation and air conditioning systems, and in particular relates to a composite air duct connection structure. Background Art

[0002] Traditional ventilation and air-conditioning system composite panels mostly adopt a sandwich structure, that is, the outer walls of two layers of composite panels are covered with metal or refractory composite panels of a certain thickness, and the middle is filled with thermal insulation materials such as rock wool, glass wool, polyurethane, etc., and are processed and fixed into an integrated sandwich structure by bonding or molding technology; double-sided color steel plate composite insulation panels are the main raw materials for air ducts and air-conditioning boxes. They mostly use F-type, I-type, pound-type, angle-type and other flange or snap-on profiles, supplemented by bolts or rivets to connect and fix the composite panels into a sealed air-conditioning box or air duct body.

[0003] During the construction process of connecting the profile or flange with the composite board, the right-angle joints of the air duct or air-conditioning box are prone to quality problems such as debonding, falling off, and collapse of the thermal insulation material in the board, causing condensation, air leakage, and cold bridge phenomena on the surface of the air duct or air-conditioning box. In the event of a fire, this area is a structural weak point, which is prone to reduce the heat resistance and thermal insulation performance of the composite board due to leakage, thereby reducing the fire resistance limit of the air duct or box.

[0004] In view of the drawbacks of the existing technology, as a ventilation and air-conditioning system design, production and construction unit, it is very necessary to design a composite plate air duct or air-conditioning box connection structure, the purpose of which is to adopt a stable connection structure that can achieve connection and fixation at the right-angle joints of the composite insulation air duct or air-conditioning box. Through this connection structure, condensation, air leakage and cold bridge phenomena on the surface of the air duct or air-conditioning box can be overcome, and the fire resistance limit value of the air duct or box can be achieved and extended. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a composite air duct connection structure, which adopts a rivet-free and bite-free card strip plug-in connection structure, and embeds insulating and fire-resistant hollow profiles on the top, side and bottom surfaces on both sides of the right-angle connection of the air duct or air-conditioning box; adopts a cross-shaped dovetail slide card strip connection structure to connect the double-sided color steel composite insulation board materials on both sides of the right angle of the air duct or air-conditioning box into an integrated closed structure, so as to effectively avoid the occurrence of cold bridges, surface condensation, air leakage and the like at the right-angle connection, and improve the fire insulation and fire resistance of the composite air duct.

[0006] The solution described in the utility model is described as follows: a composite air duct connection structure, which includes two composite plates butted at right angles, a blocking bending portion is provided on the butt port of the composite plate, an embedded profile is fixed through the blocking bending portion, a dovetail groove is provided on the embedded profile, and the dovetail grooves of the embedded profile on the two adjacent composite plates butted at right angles jointly realize the plug-in fixation of the card strip; an inner sealing strip and an outer sealing strip are provided at the edges of the butt joint of the two composite plates.

[0007] The blocking bending portion forms an outer blocking groove, and the embedded profile is provided with a convex rib facing the outer blocking groove, and the convex rib is plug-fitted with the outer blocking groove.

[0008] The clamping strip is a cross clamping strip, which includes a dovetail clamping strip and a flat clamping strip. The dovetail clamping strip is inserted and fixed in the dovetail slide groove, and the end of the flat clamping strip is fixed on the vertical edge of the blocking bending part.

[0009] The right-angle connection structure of the two composite plates is a rivet-free riveting or bite-free connection structure.

[0010] The embedded profile is arranged in the middle heat insulation layer between the inner metal layer and the outer metal layer of the composite plate. The center line direction of the dovetail chute of the embedded profile is arranged along the length direction of the composite plate.

[0011] The inner metal layer and the outer metal layer of the composite plate wrap, compress and fix the convex ribs of the embedded profile along the center line direction of the dovetail slide and fix them firmly.

[0012] Preferably, the embedded profile is molded or pultruded using flame-retardant and heat-insulating materials such as plastic, ABS, fiberglass, rubber, and carbon fiber.

[0013] Preferably, the clip strip is molded or pultruded using flame-retardant and heat-insulating materials such as plastic, ABS, fiberglass, rubber, and carbon fiber.

[0014] Preferably, the width of the embedded profile is matched with the thickness of the composite board, and the cross-sectional width of the embedded profile is 1-2 mm smaller than the thickness of the composite board, so as to facilitate the embedded concave profile to be wrapped and firmly pressed by the inner and outer metal steel plates of the composite board.

[0015] Preferably, the dovetail groove depth or trapezoidal height of the embedded profile is 5 to 10 mm.

[0016] Preferably, the width of the trapezoidal upper base of the dovetail groove of the embedded profile is 5 to 8 mm; the width of the trapezoidal lower base of the dovetail groove of the embedded profile is 8 to 12 mm.

[0017] Preferably, the angles between the two waists of the dovetail groove of the embedded profile and the bottom edge are 60-80°; the angles between the two waists of the dovetail clip on the matching cross clip and the bottom edge are 60-80°.

[0018] Preferably, the height of the rib of the embedded profile is 2 to 3 mm.

[0019] Preferably, the inner sealing strip and the outer sealing strip are made of flame-retardant and heat-insulating materials such as heat-insulating and flame-retardant plastics, ABS, fiberglass, rubber, and carbon fiber, and are molded or pultruded.

[0020] The utility model discloses a composite air duct connection structure, which includes two composite plates butted at right angles, a blocking bending portion is arranged on the butt joint port of the composite plates, an embedded profile is fixed through the blocking bending portion, a dovetail groove is arranged on the embedded profile, and the dovetail grooves of the embedded profile on the two adjacent composite plates butted at right angles jointly realize the plug-in fixation of the card strip; an inner sealing strip and an outer sealing strip are arranged at the edges of the butt joint of the two composite plates.

[0021] The utility model connects the composite panels of the right-angle butt joint structure into an integrated structure by adopting the plug-in structure of a dovetail slide groove and a card strip, and seals the inside and outside by an inner sealing strip and an outer sealing strip, which can effectively avoid the occurrence of cold bridges, surface condensation, air leakage and the like at the right-angle connection of the composite panels, improve the density, fire resistance, heat insulation performance and fire resistance limit of the right-angle connection of the composite insulation air duct or the air-conditioning box, and ensure the efficient operation of the ventilation and air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the overall connection structure of the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the partially enlarged structure;

[0025] In the attached drawings, 1, bottom plate, 2, bottom embedded profile, 21, lower convex rib, 3, clamping strip, 31, dovetail clamping strip, 32, flat clamping strip, 4, outer blocking strip, 5, side embedded profile, 51, upper convex rib, 52, dovetail slide groove, 6, side plate, 61, outer metal layer, 62, middle thermal insulation layer, 63, inner metal layer, 64, outer blocking groove, 7, inner sealing strip. DETAILED DESCRIPTION

[0026] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] This embodiment discloses a composite air duct connection structure, which can be applied to the right-angle connection structure of the air duct, and can also be extended to the connection structure of the air conditioner box.

[0028] In the following embodiments, a composite air duct connection structure is specifically described. As shown in the attached drawings, it includes two composite plates butted at right angles. This composite plate can be used as a bottom plate 1, a side plate 6, and a top plate. Figure 1 In the figure, the right-angle connection structure between the bottom plate 1 and the side plate 6 is described in detail.

[0029] The composite panel adopts a sandwich structure, and includes an inner metal layer 63, an outer metal layer 61 and an intermediate heat insulation layer 62 on the side plate 6 and the bottom plate 1. The inner metal layer 63 and the outer metal layer 61 are made of color steel plates. The inner metal layer 63 and the outer metal layer 61 are provided with a blocking bend on the docking port, and this blocking bend forms an outer blocking groove 64. On the side plate 6, a side embedded profile 5 is fixed through the outer blocking groove 64; with the same structural setting, an outer blocking groove 64 is also provided on the bottom plate 1 toward the side plate 6, and a bottom embedded profile 2 is fixed toward the side plate 6 through the outer blocking groove 64.

[0030] The side embedded profile 5 is provided with a dovetail slot 52, and the dovetail slots 52 of the adjacent right-angled side panels 6 and the bottom embedded profile 2 on the bottom panel 1 jointly realize the insertion and fixation of the clip strip 3; the clip strip 3 is a cross clip strip, which includes a dovetail clip strip 31 and a flat clip strip 32 arranged up and down, the dovetail clip strip 31 is inserted and fixed in the dovetail slot 52, and the end of the flat clip strip 32 is fixed on the vertical edge of the outer blocking groove 64. After the above structural setting, the edge of the joint of the side panel 6 and the bottom panel 1 is also provided with an inner blocking strip 7 and an outer blocking strip 4, and the stable sealing of the inner and outer corner gaps of the side panel 6 and the bottom panel 1 is achieved through such blocking strips.

[0031] Furthermore, the utility model also provides upper ribs 51 and lower ribs 21 on the side embedded profile 5 and the bottom embedded profile 2 facing the outer blocking groove 64, and the upper ribs 51 and the lower ribs 21 are plugged and matched with the outer blocking groove 64, further improving the assembly strength and stability. Preferably, the design height of the upper ribs 51 and the lower ribs 21 is 2 to 3 mm.

[0032] The above structure realizes that the right-angle connection structure of the side plate 6 and the bottom plate 1 is a rivet-free or bite-free connection structure. Such a rivet-free and bite-free structure will not damage the profile and the structure of the inner metal layer 63 and the outer metal layer 61, and will not cause liquid leakage.

[0033] On the basis of the above structural arrangement, the utility model can also be further extended or constrained technically, with the aim of making the utility model have a better appearance after assembly, a higher assembly strength, and better sealing and moisture-proof performance. The embedded profile is arranged in the middle insulation layer 62 between the inner metal layer 63 and the outer metal layer 61 of the composite panel. The center line direction of the dovetail groove 52 of the embedded profile is arranged along the length direction of the composite panel. The inner metal layer 63 and the outer metal layer 61 of the composite panel wrap, press, and fix the ribs of the embedded profile along the center line direction of the dovetail groove 52, and fix them firmly. The above-mentioned embedded profile and composite panel include a side embedded profile 5, a bottom embedded profile 2, a side panel 6, and a bottom panel 1.

[0034] Preferably, the side embedded profile 5 and the bottom embedded profile 2 are molded or pultruded using flame retardant and heat insulating materials such as plastic, ABS, fiberglass, rubber, and carbon fiber.

[0035] Preferably, the clip strip 3 is molded or pultruded using flame-retardant and heat-insulating materials such as plastic, ABS, fiberglass, rubber, and carbon fiber.

[0036] Preferably, the width of the side embedded profile 5 and the bottom embedded profile 2 is matched with the thickness of the side panel 6 or the bottom panel 1, and the cross-sectional width of the side embedded profile 5 and the bottom embedded profile 2 is 1 to 2 mm smaller than the thickness of the side panel 6 or the bottom panel 1, in order to facilitate the embedded profile to be wrapped and firmly pressed by the inner and outer metal layers of the composite panel.

[0037] Preferably, the dovetail groove depth or trapezoidal height of the side embedded profile 5 and the bottom embedded profile 2 is 5 to 10 mm.

[0038] Preferably, the width of the trapezoidal upper bottom of the dovetail groove of the side embedded profile 5 and the bottom embedded profile 2 is 5 to 8 mm; the width of the trapezoidal lower bottom of the dovetail groove of the side embedded profile 5 and the bottom embedded profile 2 is 8 to 12 mm.

[0039] Preferably, the angles between the two waists of the dovetail grooves 52 of the side embedded profiles 5 and the bottom embedded profiles 2 and the bottom edge are 60-80°; the angles between the two waists of the dovetail clips 31 on the clips 3 matched therewith and the bottom edge are 60-80°.

[0040] Preferably, the inner blocking strip 7 and the outer blocking strip 4 are made of flame-retardant and heat-insulating materials such as heat-insulating and flame-retardant plastics, ABS, fiberglass, rubber, and carbon fiber, and are molded or pultruded.

[0041] To sum up, after the utility model adopts the above structural design, the inner metal layer 63 and the outer metal layer 61 on both sides of the right angle of the composite insulation board air duct or the air-conditioning box are connected into an integrated structure by adopting the structure of the dovetail groove 52 and the card strip plug-in, and are tightly sealed by the inner sealing strip 7 and the outer sealing strip 4, which can effectively avoid the occurrence of cold bridges, surface condensation, air leakage and other phenomena at the right-angle connection of the air duct, improve the density, fire resistance, heat insulation performance and fire resistance limit of the right-angle connection of the composite insulation air duct or the air-conditioning box, and ensure the efficient operation of the ventilation and air-conditioning system.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A composite air duct connection structure, characterized in that: It includes two composite panels butted at right angles, a blocking bending portion is provided on the butt joint port of the composite panels, an embedded profile is fixed through the blocking bending portion, the embedded profile is provided with a dovetail groove, and the dovetail grooves of the embedded profiles on the two adjacent composite panels butted at right angles jointly realize the plug-in fixation of the card strip; an inner sealing strip and an outer sealing strip are provided at the edges of the butt joint of the two composite panels.

2. The composite air duct connection structure according to claim 1, characterized in that: The blocking bending portion forms an outer blocking groove, and the embedded profile is provided with a convex rib facing the outer blocking groove, and the convex rib is plug-fitted with the outer blocking groove.

3. The composite air duct connection structure according to claim 1, characterized in that: The clamping strip is a cross clamping strip, which includes a dovetail clamping strip and a flat clamping strip. The dovetail clamping strip is inserted and fixed in the dovetail slide groove, and the end of the flat clamping strip is fixed on the vertical edge of the blocking bending part.

4. The composite air duct connection structure according to claim 1, characterized in that: The embedded profile is arranged in the middle heat insulation layer between the inner metal layer and the outer metal layer of the composite plate.

5. The composite air duct connection structure according to claim 4, characterized in that: The inner metal layer and the outer metal layer of the composite plate wrap, compress and fix the convex ribs of the embedded profile along the center line direction of the dovetail slide and fix them firmly.

6. The composite air duct connection structure according to claim 1, characterized in that: The embedded profile is made of any one of plastic, ABS, fiberglass, rubber and carbon fiber.

7. The composite air duct connection structure according to claim 1, characterized in that: The clamping strip is made of any one of plastic, ABS, fiberglass, rubber and carbon fiber.

8. The composite air duct connection structure according to claim 1, characterized in that: The width of the embedded profile is matched with the thickness of the composite board, and the cross-sectional width of the embedded profile is 1-2 mm smaller than the thickness of the composite board.

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