Double-layer circular spiral heat-preservation fire-resistant air pipe

Abstract

The utility model discloses a double-layer circular spiral heat preservation fire-resistant air pipe which comprises a connector, an outer ring air pipe and an inner ring air pipe, fire-resistant materials are arranged between the outer ring air pipe and the inner ring air pipe, L-shaped fixing plates are arranged on the two sides of the connector, longitudinal supporting plates are arranged on the outer sides of the L-shaped fixing plates, and the longitudinal supporting plates are arranged on the outer sides of the L-shaped fixing plates. A transverse supporting plate is arranged above the longitudinal supporting plate, an adjusting screw rod is inserted into the center of the transverse supporting plate, a locking screw hole is formed in the top of the connector, a locking screw rod is rotationally installed in the locking screw hole, the surface of the locking screw rod is sleeved with a pressing block, and the pressing block is located on the outer side of the outer ring air pipe. According to the double-layer circular spiral heat-preservation fire-resistant air pipe, through the double-layer design, the inner layer and the outer layer are connected through the connector and are not in contact, and the fireproof material is filled between the inner layer and the outer layer, so that heat transfer between the inner layer and the outer layer is reduced, and certain heat-insulation and fire-resistant effects are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a double-layer circular spiral heat-insulating fire-resistant air duct. Background Art

[0002] The air duct is mainly used to connect two places to achieve air circulation between the two places and play a ventilation role. Existing air ducts are mostly rectangular and circular, and are mostly made of galvanized thin iron sheets. For example, the prior art: CN220479770U, an adjustable spiral air duct equipment, including a spiral air duct machine and a receiving platform arranged on one side of the spiral air duct machine for receiving the spiral air duct, the receiving platform includes a base frame and two sets of guide frames with adjustable spacing, and the receiving platform is also provided with a forming mechanism for processing the circular air duct, the forming mechanism includes a stretching component slidably mounted on the base frame and an extrusion component symmetrically arranged on one side of the outer ends of the two sets of guide frames.

[0003] There are other existing technologies:

[0004] CN216137914U, a fully automatic rolling stainless steel spiral duct machine;

[0005] CN215823957U, a welding interface type spiral duct machine.

[0006] The double-layer circular spiral heat-insulating fire-resistant air duct mentioned in the above-mentioned prior art often does not have fire-resistant properties, and is easily deformed due to its single-layer structure. Utility Model Content

[0007] The utility model aims to provide a double-layer circular spiral heat-insulating fire-resistant air duct to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer circular spiral heat-insulating refractory air duct, comprising a connector, an outer ring air duct and an inner ring air duct, characterized in that: a refractory material is arranged between the outer ring air duct and the inner ring air duct, L-shaped fixing plates are arranged on both sides of the connector, a longitudinal support plate is arranged on the outer side of the L-shaped fixing plate, a transverse support plate is arranged above the longitudinal support plate, an adjusting screw is inserted in the center of the transverse support plate, a locking screw hole is opened on the top of the connector, a locking screw is rotatably installed inside the locking screw hole, a pressure block is sleeved on the surface of the locking screw, and the pressure block is located on the outer side of the outer ring air duct.

[0009] Preferably, an arc cushion is provided on the top of the L-shaped fixing plate.

[0010] Preferably, reserved holes are provided at both ends of the inner circle air duct, and the width of the reserved holes is the same as the width of the connector.

[0011] Preferably, the bottom of the pressing block is arc-shaped.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The double-layer circular spiral heat-insulating refractory air duct has a double-layer design. The inner and outer layers are connected by connectors without contact, and refractory materials are filled between the two, thereby reducing the transfer of heat between the inner and outer sides and achieving a certain heat-insulating and refractory effect.

[0014] 2. The double-layer circular spiral heat-insulating fire-resistant air duct has multiple inner ring air ducts connected and fixed by connectors, and the outer ring air duct passes through the pressing block and is fixed inside by locking screws, so that the whole structure is simple to assemble and disassemble, the specifications of the air duct can be adjusted arbitrarily, and the application range is wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the inner ring air duct of the utility model structure;

[0017] Figure 3 This is a cross-sectional view of the structure of the utility model;

[0018] Figure 4 for Figure 3 The enlarged view of point A is shown;

[0019] Figure 5 This is a schematic diagram of the structural connector of the utility model.

[0020] In the figure: 1. Connector; 2. Outer ring air duct; 3. Inner ring air duct; 4. Refractory material; 101. Longitudinal support plate; 102. Transverse support plate; 103. Adjusting screw; 104. L-shaped fixing plate; 105. Arc cushion; 106. Locking screw hole; 107. Locking screw; 108. Pressing block; 301. Reserved hole. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example: See Figure 1 The utility model provides a technical solution: a double-layer circular spiral heat-insulating fire-resistant air duct.

[0023] Among them, a refractory material 4 is arranged between the outer circle air duct 2 and the inner circle air duct 3, L-shaped fixing plates 104 are arranged on both sides of the connector 1, a longitudinal support plate 101 is arranged on the outer side of the L-shaped fixing plate 104, a transverse support plate 102 is arranged above the longitudinal support plate 101, an adjusting screw 103 is inserted in the center of the transverse support plate 102, a locking screw hole 106 is opened on the top of the connector 1, a locking screw 107 is rotatably installed inside the locking screw hole 106, a pressure block 108 is sleeved on the surface of the locking screw 107, and the pressure block 108 is located on the outside of the outer circle air duct 2.

[0024] In this embodiment, the edge of the inner circle air duct 3 fits between the longitudinal support plate 101 of the connector 1 and the lower half of the L-shaped fixing plate 104, the adjusting screw 103 passes through the transverse support plate 102, the longitudinal support plate 101 and the L-shaped fixing plate 104 in sequence, the nut is screwed into the bottom of the L-shaped fixing plate 104, the head of the adjusting screw 103 is pressed on the transverse support plate 102, and the transverse support plate 102 is pressed on the longitudinal support plate 101, with the rotation of the adjusting screw 103, the L-shaped fixing plate 104 is driven to move up, the distance between the L-shaped fixing plate 104 and the longitudinal support plate 101 is reduced, the corresponding position is inserted into the edge of the inner circle air duct 3, so that the L-shaped fixing plate 104 cooperates with the longitudinal support plate 101 The inner circle air duct 3 is clamped and fixed. The connector 1 is symmetrical on the left and right. The two inner circle air ducts 3 are clamped at both ends of the four connectors 1 to connect the two inner circle air ducts 3, and the outer circle air duct 2 is sleeved on the outer circle. The inner diameter of the outer circle air duct 2 is larger than the inner circle air duct 3, and a radius of the height of the connector 1 is reserved to prevent the top of the connector 1 from rubbing against the inner side of the outer circle air duct 2. Finally, holes are punched at the corresponding positions of the outer circle air duct 2 and the locking screws 107 and the pressing block 108 are passed through. The pressing block 108 is pressed against the surface of the outer circle air duct 2, so that the outer circle air duct 2 and the inner circle air duct 3 are fixed to each other, and refractory material 4 is filled between the outer circle air duct 2 and the inner circle air duct 3 to reduce the transfer of heat between the two air ducts.

[0025] A circular arc cushion 105 is arranged on the top of the L-shaped fixing plate 104 .

[0026] In this embodiment, the arc cushion 105 enables the bottom of the L-shaped fixing plate 104 to fit the inner side of the inner circle air duct 3, and the clamping between the longitudinal support plate 101 and the L-shaped fixing plate 104 fixes the inner circle air duct more firmly.

[0027] Wherein, reserved holes 301 are opened at both ends of the inner circle air duct 3 , and the width of the reserved holes 301 is the same as the width of the connector 1 .

[0028] In this embodiment, the two inner circle air ducts 3 are butt-jointed, the reserved holes 301 are combined and aligned, the connector 1 is inserted into the reserved hole 301 in advance, and the L-shaped fixing plate 104 fixes the inner circle air duct 3 outside the reserved hole 301, so that the inner circle air duct 3 aligned by the connector 1 can fit together to avoid gaps at the joints.

[0029] The bottom of the pressing block 108 is arc-shaped.

[0030] In this embodiment, the pressing block 108 and the arc cushion 105 have similar functions. The arc cushion 105 is a convex arc shape, which fits the inner side of the inner circle air duct 3, while the bottom of the pressing block 108 is a concave arc shape, which fits the outer side of the outer circle air duct 3, so that the fitting area between the pressing block 108 and the outer circle air duct 3 is larger and the compression is tighter.

[0031] Working principle: The adjusting screw 103 is passed through the horizontal support plate 102, the vertical support plate 101 and the L-shaped fixing plate 104 in sequence, the nut is screwed into the bottom of the L-shaped fixing plate 104, the head of the adjusting screw 103 is pressed on the horizontal support plate 102, and the horizontal support plate 102 is pressed on the vertical support plate 101, the L-shaped fixing plate 104 fits the center column of the connector 1, both sides of the connector 1 are installed, the L-shaped fixing plate 104 is inserted into the reserved hole 301, and the adjusting screw 103 is rotated to drive the L-shaped Move the fixing plate 104 upward, so that the L-shaped fixing plate 104 cooperates with the longitudinal support plate 101 to clamp the inner circle air duct 3 and fix it. The inner circle air duct 3 is installed on both ends of the left and right ends of the connector 1 to connect the two inner circle air ducts 3. Then, the outer circle air duct 2 is put on the outer circle. The holes on the outer circle air duct 2 are aligned with the locking screw holes 106 on the connector 1, and the pressure blocks 108 and locking screws 107 are put on to fix the outer circle air duct 2 and the inner circle air duct 3. Finally, fill the refractory material 4 between the inner circle air duct 3 and the outer circle air duct 2.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A double-layer circular spiral heat-insulating fire-resistant air duct, comprising a connector (1), an outer ring air duct (2) and an inner ring air duct (3), characterized in that: A refractory material (4) is arranged between the outer ring air duct (2) and the inner ring air duct (3); L-shaped fixing plates (104) are arranged on both sides of the connector (1); a longitudinal support plate (101) is arranged on the outer side of the L-shaped fixing plate (104); a transverse support plate (102) is arranged above the longitudinal support plate (101); an adjusting screw (103) is inserted into the center of the transverse support plate (102); a locking screw hole (106) is opened at the top of the connector (1); a locking screw (107) is rotatably installed inside the locking screw hole (106); a pressure block (108) is sleeved on the surface of the locking screw (107); and the pressure block (108) is located on the outer side of the outer ring air duct (2).

2. A double-layer circular spiral heat-insulating fire-resistant air duct according to claim 1, characterized in that: A circular arc cushion (105) is arranged on the top of the L-shaped fixing plate (104).

3. The double-layer circular spiral heat-insulating fire-resistant air duct according to claim 1, characterized in that: Reserved holes (301) are provided at both ends of the inner ring air duct (3), and the width of the reserved holes (301) is the same as the width of the connector (1).

4. The double-layer circular spiral heat-insulating fire-resistant air duct according to claim 1, characterized in that: The bottom of the pressing block (108) is in an arc shape.

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