Elliptical air pipe external hoop forming device

Abstract

The utility model discloses an oval type air pipe external hoop forming device which comprises an outer ring hoop and an inner ring hoop, one end of the outer ring hoop and one end of the inner ring hoop are fixedly connected with connecting bases, a transverse shaft is installed in the center of each connecting base, a hanging ring is connected to the surface of each transverse shaft in a sleeved mode, one end of each hanging ring is fixedly connected with a threaded rod, and the other end of each hanging ring is fixedly connected with a threaded rod. A shell is arranged at the center positions of the two connecting seats, an inner cavity is formed in the shell, an adjusting wheel is installed at the center of the inner cavity, and two internal thread sleeves are installed at the center of the adjusting wheel; according to the oval air pipe external hoop forming device, the hoop is formed by combining the two sections, the hoop can be lengthened so that the overall radius of the hoop can be increased, the distance between the circle centers of the left arc and the right arc can be changed by adjusting the distance between the connecting bases, and therefore the oval air pipe external hoop forming device can adapt to oval air pipes of different sizes.

Description

Technical Field

[0001] The utility model relates to the technical field of clamps, in particular to an elliptical air duct external clamp forming device. Background Art

[0002] Spiral ducts are mainly used to connect two places, realize air circulation between the two places, and play a ventilation role. They are the most widely used HVAC ducts on the market. The length of a single spiral duct is limited, and multiple spiral ducts need to be connected. A clamp is required to connect the spiral ducts. For example, the prior art: CN208457391U: A duct quick-connect clamp, comprising: a clamp body, a connecting piece, and a tension adjustment piece; the clamp body is composed of a left hoop groove and a right hoop groove; one end of the left hoop groove is connected to one end of the right hoop groove by a connecting piece, and the other end of the left hoop groove is connected to the other end of the right hoop groove by a tension adjustment piece; the connecting piece is composed of a first connecting seat and a second connecting seat, and the first connecting seat and the second connecting seat are connected by a rotating shaft.

[0003] There is also existing technology:

[0004] CN214008390U: A clamp that facilitates the connection of spiral air ducts;

[0005] CN214008389U: A clamp for fastening an air duct.

[0006] The above-mentioned prior art mentions an elliptical air duct external clamp forming device, most of which are circular clamps. However, in actual use, corresponding elliptical air ducts appear, and conventional circular clamps are not suitable for elliptical pipes. Therefore, a clamp that can adjust the distance so that it can be used on elliptical pipes is needed. Utility Model Content

[0007] The purpose of the present utility model is to provide an elliptical air duct external clamp forming device to solve the problems raised in the above background technology.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an elliptical air duct external clamp forming device, comprising an outer ring clamp and an inner ring clamp, characterized in that: a groove is provided inside the outer ring clamp, an inner ring clamp is embedded and installed inside the groove, one end of the outer ring clamp and the inner ring clamp are fixedly connected to a connecting seat, a horizontal axis is installed at the center position of the connecting seat, a hanging ring is sleeved on the surface of the horizontal axis, one end of the hanging ring is fixedly connected to a threaded rod, an outer shell is provided at the center position of the two connecting seats, an inner cavity is provided inside the outer shell, an adjusting wheel is installed at the center of the inner cavity, two internal threaded sleeves are installed at the center of the adjusting wheel, the internal threaded sleeve is sleeved on the threaded rod, the two threaded rods pass through the outer shell, and teeth are provided inside the adjusting wheel and outside the internal threaded sleeve.

[0009] Preferably, a box cover is provided on the top of the shell, a rotating shaft is provided on the box cover and the back of the shell, and a lock is provided on the box cover and the front of the shell.

[0010] Preferably, an anti-slip device is provided on the surface of the adjusting wheel, and a stop block is provided inside the box cover.

[0011] Preferably, the arc radius of the outer embracing hoop and the inner embracing hoop is the same.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The oval-shaped duct external clamp forming device rotates the adjusting wheel to drive the two internal threaded sleeves to rotate through the gears. The threaded engagement causes the two threaded rods to move in opposite directions, thereby adjusting the distance between the symmetrical clamps. The change in the upper and lower distances adjusts the circular clamp into an oval shape to wrap the duct joint.

[0014] 2. The external clamp forming device of the oval air duct is composed of two sections. The clamp can be stretched to increase the overall radius of the clamp. The distance between the centers of the left and right arcs can be changed by adjusting the distance between the connecting seats, thereby coping with oval air ducts of different sizes. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 2 This is a schematic diagram of the structural connection seat of the utility model;

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

[0018] Figure 4 This is a cross-sectional view of the connection between the outer embracing hoop and the inner embracing hoop of the utility model structure.

[0019] In the figure: 1. Outer hoop; 2. Inner hoop; 3. Connecting seat; 4. Horizontal axis; 5. Hanging ring; 6. Threaded rod; 7. Internal threaded sleeve; 8. Adjusting wheel; 9. Outer shell; 10. Box cover; 11. Stop block; 12. Lock. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example: See Figure 1 The utility model provides a technical solution: an elliptical air duct external clamp forming device.

[0022] Among them, a groove is provided inside the outer annular hoop 1, and an inner annular hoop 2 is embedded in the groove. One end of the outer annular hoop 1 and the inner annular hoop 2 are fixedly connected to a connecting seat 3, a horizontal axis 4 is installed at the center of the connecting seat 3, a hanging ring 5 is sleeved on the surface of the horizontal axis 4, and a threaded rod 6 is fixedly connected to one end of the hanging ring 5. An outer shell 9 is provided at the center of the two connecting seats 3, an inner cavity is opened inside the outer shell 9, an adjusting wheel 8 is installed at the center of the inner cavity, two internal threaded sleeves 7 are installed at the center of the adjusting wheel 8, the internal threaded sleeve 7 is sleeved on the threaded rod 6, and the two threaded rods 6 pass through the outer shell 9, and teeth are provided inside the adjusting wheel 8 and outside the internal threaded sleeve 7.

[0023] In this embodiment, the groove is a T-slot, which is fixed by embedding the T-shaped boss of the inner hoop 2 in the outer hoop 1. A connecting seat 3 is provided at both ends, and the two internal threaded sleeves 7 installed in the outer shell 9 are symmetrical on the left and right, and are sleeved on the threaded rod 6 passing through the two sides of the outer shell 9. The threaded rod 6 is sleeved on the horizontal axis 4 in the center of the connecting seat 3 through the hanging ring 5 at one end. The two threaded rods 6 are facing oppositely and symmetrically. The adjusting wheel 8 in the outer shell 9 is rotated to allow the teeth on the inner side of the adjusting wheel 8 to engage with the outer ring teeth of the internal threaded sleeve 7, thereby driving the two internal threaded sleeves 7 to rotate in the same direction and allowing the internal threads to engage with the two threaded rods 6 facing oppositely, ultimately causing the threaded rods 6 to move in opposite directions, pushing or pulling the connecting seat 3, adjusting the distance between the symmetrical hoop, and changing the center distance of the left and right arcs, thereby coping with elliptical air ducts of different sizes.

[0024] A box cover 10 is provided on the top of the shell 9 , a rotating shaft is provided on the box cover 10 and the back of the shell 9 , and a lock buckle 12 is provided on the front of the box cover 10 and the shell 9 .

[0025] In this embodiment, the box cover 10 is connected and fixed to the shell 9 through a rotating shaft. The box cover 10 rotates around the rotating shaft and is buckled on the shell 9 to close the shell 9, thereby wrapping the adjusting wheel 8 to prevent accidental touch. An iron wire can be wrapped around the lock buckle 12 to lock it to prevent the shell 9 from opening.

[0026] The surface of the regulating wheel 8 is provided with an anti-slip device, and the interior of the box cover 10 is provided with a stop block 11 .

[0027] In this embodiment, the operator rotates the adjusting wheel 8 to adjust the distance between the connecting seats 3. The anti-slip device is a plurality of grooves on the surface to increase the friction between the hand and the adjusting wheel 8. The stop block 11 presses on the adjusting wheel 8 after closing the box cover 10 to prevent the adjusting wheel 8 from rotating and restrict the adjusting wheel 8.

[0028] The outer embracing hoop 1 and the inner embracing hoop 2 have the same arc radius.

[0029] In this embodiment, only two hoops with the same radius can fit together, and the inner hoop 2 can slide in the outer hoop 1 to greatly adjust the distance between the connecting seats 3, and then adjust the distance between the connecting seats 3 slightly through the adjusting wheel 8.

[0030] Working principle: first adjust the position of the inner hoop 2 in the outer hoop 1, adjust the distance between the connecting seats 3 that are close to each other, then open the box cover 10, rotate the adjusting wheel 8, and engage the teeth on the inner side of the adjusting wheel 8 with the outer ring teeth of the internal threaded sleeve 7, thereby driving the two internal threaded sleeves 7 to rotate in the same direction, and let the internal threads engage the two threaded rods 6 facing opposite directions, and finally make the threaded rods 6 move in opposite directions, pushing or pulling the connecting seat 3, so as to fine-tune the distance between the two hoops. The change in the upper and lower distances adjusts the circular hoop into an elliptical shape to wrap the air duct connection, and adjusts the distance according to the air ducts of different sizes to wrap the air duct as much as possible to fix it, and finally cover the box cover 10 and lock the lock buckle 12, and fix the adjusting wheel 8 with the stop block 11 to prevent it from loosening.

[0031] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elliptical air duct external hoop forming device, comprising an outer hoop (1) and an inner hoop (2), characterized in that: The outer embracing hoop (1) is provided with a groove inside, and the inner embracing hoop (2) is embedded and installed inside the groove. One end of the outer embracing hoop (1) and the inner embracing hoop (2) are fixedly connected to a connecting seat (3). A transverse axis (4) is installed at the center of the connecting seat (3). A hanging ring (5) is sleeved on the surface of the transverse axis (4). One end of the hanging ring (5) is fixedly connected to a threaded rod (6). An outer shell (9) is provided at the center of the two connecting seats (3). An inner cavity is provided inside the outer shell (9). An adjusting wheel (8) is installed at the center of the inner cavity. Two internal thread sleeves (7) are installed at the center of the adjusting wheel (8). The internal thread sleeves (7) are sleeved on the threaded rod (6). The two threaded rods (6) pass through the outer shell (9). Teeth are provided inside the adjusting wheel (8) and outside the internal thread sleeve (7).

2. The device for forming an elliptical air duct external clamp according to claim 1, characterized in that: A box cover (10) is arranged on the top of the shell (9), a rotating shaft is arranged on the back of the box cover (10) and the shell (9), a lock buckle (12) is arranged on the front of the box cover (10) and the shell (9), and a stop block (11) is arranged inside the box cover (10).

3. The device for forming an elliptical air duct external clamp according to claim 1, characterized in that: The surface of the regulating wheel (8) is provided with an anti-slip device.

4. The device for forming an elliptical air duct external clamp according to claim 1, characterized in that: The outer embracing hoop (1) and the inner embracing hoop (2) have the same arc radius.

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