Rotational molding double-layer flange

Abstract

The utility model discloses a rotational molding double-layer flange, which relates to the technical field of flanges, is used for solving the technical problem that a conventional connecting flange on the market cannot be connected with a double-layer air duct, and comprises a double-layer flange body which is provided with a double-layer structure, the double-layer structure comprises an outer layer and an inner layer, the two ends of the outer layer and the two ends of the inner layer are connected with each other, a cavity is formed between the outer layer and the inner layer, the section of the cavity is in a cross shape, and connecting plugs are arranged at the top and the bottom of the double-layer flange body and used for being matched with an air duct to be connected in an inserted mode. The connecting flange is suitable for multi-section connection of split type double-layer air ducts, the connecting strength of the inner air duct and the outer air duct is enhanced while the upper air duct and the lower air duct are connected, fixing bolts for original connection of the inner air duct and the outer air duct are omitted, use is convenient, the mounting strength is good, and the technical problem that a conventional connecting flange on the market cannot be connected with the double-layer air ducts is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flanges, in particular to a rotational molding double-layer flange. Background Art

[0002] In the existing livestock ventilation equipment industry, most of the roof fan air ducts are single-layer, and double-layer air ducts are rarely used. When connecting conventional single-layer air ducts, conventional single-layer flanges are generally used, that is, the common flanges on the market. When using double-layer air ducts, if a sandwich split-assembled double-layer air duct is adopted, the connecting flanges used for traditional single-layer air ducts cannot meet their connection functions and usage requirements.

[0003] Therefore, in view of the deficiencies of the above solutions in actual production and implementation, they are corrected and improved. Meanwhile, in the spirit of pursuing excellence and with the assistance of professional knowledge and experience, and after various ingenious ideas and tests, a rotational molding double-layer flange is provided to solve the technical problem that the conventional connecting flanges on the market cannot connect double-layer air ducts. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a rotational molding double-layer flange to solve the problems existing in the prior art.

[0005] The technical solution of the utility model is realized as follows:

[0006] A rotational molding double-layer flange includes a double-layer flange body. The double-layer flange body is provided with a double-layer structure, which includes an outer layer and an inner layer connected to each other at both ends. A cavity is arranged between the outer layer and the inner layer, and the cross-section of the cavity is in a cross shape. Plug connectors are respectively arranged at the top and bottom of the double-layer flange body, and the plug connectors are used for plugging with the air duct.

[0007] As a preferred implementation manner, the double-layer flange body is integrally processed by rotational molding.

[0008] When in use, the device is generally used in combination with self-tapping screws. By sequentially penetrating the outer cylinder of the air duct, the rotational molding double-layer flange, and the inner cylinder of the air duct with self-tapping screws, a firm fixed connection can be achieved.

[0009] Design and principle of the utility model: The cross-section of the double-layer flange body and the cavity is in a cross-shaped structure. The upper and lower sections of the cross structure (i.e., the top and bottom of the double-layer flange body) are inserted into the sandwich layer of the sandwich split-assembled double-layer air duct, and the space occupied by them is exactly the same as the reserved cavity of the sandwich layer, so as to achieve a tight fit. At this time, the end faces of the inner and outer cylinders of the upper and lower sections of the air duct are in contact with the protruding surfaces on the left and right of the flange cross structure.

[0010] The beneficial effects of the utility model are:

[0011] With the help of this rotational molding double-layer flange to connect the double-layer air duct, the connection strength of the air duct can be improved, and the roundness of the air duct can be improved. Self-tapping screws can penetrate the outer cylinder of the air duct, the rotational molding double-layer flange, and the inner cylinder of the air duct in sequence, so as to reduce the number of fixing parts without affecting the connection strength.

[0012] The utility model is suitable for multi-section connection of split double-layer air ducts. While connecting the upper and lower sections of the air ducts, it strengthens the connection strength between the inner and outer air ducts, and eliminates the fixing bolts for connecting the inner and outer cylinders. It is convenient to use and has good installation strength, solving the technical problem that the conventional connection flanges on the market cannot connect double-layer air ducts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0015] Figure 2 It is a partial cross-sectional schematic diagram of another embodiment of the present utility model;

[0016] Figure 3 It is a schematic diagram of the use state of the present utility model;

[0017] Figure 4 For Figure 3 an enlarged schematic diagram of part A in

[0018] In the figure, 1 - double-layer flange body; 2 - socket; 3 - cavity; 4 - outer layer; 5 - inner layer; 6 - first double-layer air duct; 7 - second double-layer air duct. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments.

[0020] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0021] In addition, the descriptions involving "first", "second", etc. in the present utility model are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0022] In the description of the embodiments, unless otherwise clearly specified and defined, terms such as "arranged", "connected", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or connected through an intermediate medium, or there may be a communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] As Figures 1 to 2 shown, a rotational molding double-layer flange includes a double-layer flange body 1. The double-layer flange body 1 is provided with a double-layer structure, and the double-layer structure includes an outer layer 4 and an inner layer 5 connected to each other at both ends. A cavity 3 is arranged between the outer layer 4 and the inner layer 5, and the cross-section of the cavity 3 is in a cross shape. Plug connectors 2 are respectively arranged at the top and bottom of the double-layer flange body 1, and the plug connectors 2 are used for mating with a wind tube for plugging.

[0024] The double-layer flange body 1 is integrally processed by rotational molding.

[0025] During use, this device is generally used in cooperation with self-tapping screws. By successively penetrating the outer cylinder of the wind tube, the rotational molding double-layer flange, and the inner cylinder of the wind tube with the self-tapping screws, a firm fixed connection can be achieved.

[0026] Figure 3 What is shown is a schematic diagram of the use state of the present utility model. The present utility model is used for connecting a double-layer wind tube. The upper wind tube is the Figure 3 first double-layer wind tube 6 in Figure 3 and the lower wind tube is the

[0027] second double-layer wind tube 7 in Figure 3 . The self-tapping screws horizontally penetrate along the

[0028] Design and principle of the utility model: The cross-section of the double-layer flange body 1 and the cavity 3 is a cross-shaped structure, and the upper and lower sections of the cross structure (i.e., the top and bottom of the double-layer flange body 1) are inserted into the sandwich layer of the sandwich split double-layer air duct and the space occupied by them is exactly consistent with the reserved cavity 3 of the sandwich layer, thereby achieving a tight fit. At this time, the inner and outer end faces of the upper and lower sections of the air duct are in contact with the convex surfaces on the left and right of the flange cross structure.

[0029] The beneficial effects of the utility model are:

[0030] The utility model has a simple structure, is easy to install, has high connection strength and is convenient for transportation. By connecting the double-layer wind tube with the rotational molded double-layer flange, the connection strength of the wind tube can be improved and the roundness of the wind tube can be improved. The self-tapping screws can be used to penetrate the outer tube of the wind tube, the rotational molded double-layer flange, and the inner tube of the wind tube in sequence, thereby reducing the number of fixings without affecting the connection strength.

[0031] The utility model is suitable for multi-section connection of split double-layer air ducts. When connecting the upper and lower sections of the air duct, the strength of the connection between the inner and outer air ducts is strengthened, and the original fixing bolts connecting the inner and outer ducts are omitted. It is easy to use and has good installation strength, and solves the technical problem that conventional connecting flanges on the market cannot be connected to double-layer air ducts.

[0032] The above is only a preferred embodiment of the utility model, and is not intended to limit the utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement; when the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the utility model.

Claims

1. A rotational molding double-layer flange, characterized in that, It includes a double-layer flange body, which is provided with a double-layer structure. The double-layer structure includes an outer layer and an inner layer which are interconnected at both ends. A cavity is provided between the outer layer and the inner layer. The cross-section of the cavity is cross-shaped. The top and bottom of the double-layer flange body are respectively provided with plug connectors, which are used to cooperate with the air duct for plugging.

2. The rotational molding double-layer flange according to claim 1, wherein The double-layer flange body is formed by rotational molding in one piece.

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