A stretching device for air conditioner pipe reducing

Abstract

The utility model relates to a kind of stretching device for air conditioner pipe reducing, including bottom plate, movable clamping traction assembly is installed on the bottom plate upper surface, open-close type reducing die assembly and several plug-in type support anti-deformation components are sequentially installed on the bottom plate upper surface at movable clamping traction assembly side.The utility model integrates clamping, traction, reducing, supporting function in one, realizes automatic stretching by driving motor drive, improves processing efficiency and consistency;Anti-deformation ability is outstanding: inner support rod solves the local deformation problem of pipe end clamping;Multiple adjustable support points ensure the straightness and stability of long pipe material in whole processing;The open-close design of mould simplifies clamping process, and suitable mould can be conveniently replaced;The plug-in type design of support component is convenient for adjustment and layout.

Description

Technical Field

[0001] This utility model relates to the technical field of air conditioning pipe processing, and in particular to a stretching device for changing the diameter of air conditioning pipes. Background Technology

[0002] In the installation and production of air conditioning pipes, it is often necessary to reduce or expand the diameter of the ends of copper or aluminum pipes to accommodate different sizes of connecting valves or other pipe sections. Traditional methods of reducing diameter often involve manual hammering, stamping, or extrusion molding using simple molds. These methods are not only labor-intensive and inefficient, but also difficult to guarantee in terms of molding quality, easily leading to problems such as uneven pipe wall thickness, surface dents, wrinkles, and even cracks, which seriously affect the sealing performance and service life of the pipes.

[0003] To improve processing quality and efficiency, specialized pipe reducing equipment has emerged in the market. This equipment typically uses hydraulic or pneumatic drive, employing a die to press the fixedly clamped pipe end to achieve diameter reduction. However, this type of equipment has significant limitations: First, for localized diameter reductions of longer pipes, especially in areas far from the end, traditional fixed stamping dies struggle to apply force, and the pipe is prone to instability, bending, or deformation during stamping due to a lack of effective axial traction and support. Second, when the clamped pipe end is subjected to strong stretching or pushing, stress concentration at the clamping point can easily cause the pipe end to flatten or be damaged, creating potential problems for subsequent flaring and connection processes. Finally, existing equipment often uses integral molds, making pipe insertion and removal inconvenient and unsuitable for continuous or batch production. Utility Model Content

[0004] The present invention aims to address the shortcomings of the prior art by providing a tensioning device for changing the diameter of air conditioning pipes.

[0005] To achieve the above objectives, this utility model adopts the following technical solution:

[0006] A tensioning device for changing the diameter of an air conditioning pipe includes a base plate. A movable clamping and traction assembly is installed on the upper surface of the base plate. On one side of the movable clamping and traction assembly, an opening and closing diameter changing mold assembly and several plug-in support anti-deformation assemblies are sequentially installed on the upper surface of the base plate.

[0007] The movable clamping and traction assembly includes a groove on the upper surface of the base plate, a lead screw installed in the groove, a drive motor connected to the lead screw, a movable seat threaded on the lead screw, a clamping seat fixed on the movable seat, a clamping hole opened inward on one end of the clamping seat facing the opening and closing variable diameter mold assembly, and several clamping bolts circumferentially installed on the side wall of the clamping hole, the end of the air conditioning pipe to be stretched passes through the clamping hole and is clamped by the clamping bolts.

[0008] The other end of the clamping seat has a through hole facing inward. The through hole is connected to the clamping hole. An inner support rod is installed through the through hole and enters the air conditioning pipe. A sealing ring is provided between the outer wall of the inner support rod and the inner wall of the through hole.

[0009] A limiting rod is provided in the groove, and the limiting rod passes through the movable seat.

[0010] The opening and closing variable diameter mold assembly includes a lower mold and an upper mold. Both the lower mold and the upper mold have connecting plates on their connecting end faces, and the connecting plates are fixed by connecting bolts. A variable diameter hole is formed between the connecting end faces of the lower mold and the upper mold.

[0011] The bottom of the lower mold is equipped with a base, which is fixed to the base plate by fastening bolts.

[0012] The plug-in type anti-deformation support assembly includes a support base with a through support hole. The diameter of the support hole is the same as the diameter of the air conditioning pipe before the diameter reduction, and the air conditioning pipe passes through the support hole.

[0013] The bottom of the support base is equipped with a plug-in post, and the base plate is equipped with a plug-in hole. The plug-in post is inserted into the corresponding plug-in hole.

[0014] The beneficial effects of this utility model are as follows: This utility model integrates clamping, traction, diameter changing, and support functions into one unit, and achieves automated stretching through drive motor, improving processing efficiency and consistency; it has outstanding anti-deformation capabilities: the inner support rod solves the problem of local deformation at the pipe end clamping point; multiple adjustable support points ensure the straightness and stability of the long pipe throughout the entire processing; the opening and closing design of the mold simplifies the clamping process and makes it easy to change to a suitable mold; the plug-in design of the support components facilitates adjustment and layout. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the clamping and installation of the air conditioning pipe before stretching according to this utility model;

[0016] Figure 2 This is a schematic diagram of the air conditioning pipe of this utility model after it has been stretched a certain distance;

[0017] Figure 3 A schematic diagram of the components on the movable seat of the movable clamping and traction assembly;

[0018] Figure 4 This is a schematic diagram of an opening and closing variable diameter die assembly;

[0019] Figure 5 This is a schematic diagram of a plug-in support anti-deformation component;

[0020] In the diagram: 1-Base plate; 2-Moving clamping and traction assembly; 3-Opening and closing variable diameter mold assembly; 4-Plug-in support anti-deformation assembly; 5-Air conditioning pipe;

[0021] 21-Groove; 22-Lead screw; 23-Drive motor; 24-Moving seat; 25-Clamping seat; 26-Clamping hole; 27-Clamping bolt; 28-Through hole; 29-Inner support rod; 210-Sealing mounting ring; 211-Limit rod;

[0022] 31-Lower mold; 32-Upper mold; 33-Connecting plate; 34-Connecting bolt; 35-Reducing diameter hole; 36-Base; 37-Fastening bolt;

[0023] 41-Support base; 42-Support hole; 43-Plug-in post;

[0024] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0025] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0026] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0029] like Figures 1 to 5As shown, a tensioning device for changing the diameter of an air conditioning pipe includes a base plate 1. A movable clamping and traction assembly 2 is installed on the upper surface of the base plate 1. An opening and closing diameter changing mold assembly 3 and several plug-in support anti-deformation assemblies 4 are sequentially installed on one side of the movable clamping and traction assembly 2 on the upper surface of the base plate 1.

[0030] The movable clamping and traction assembly 2 is responsible for clamping and pulling the air conditioning pipe 5, providing the stretching power.

[0031] The opening and closing variable diameter mold assembly 3 is the core component for performing variable diameter forming.

[0032] The plug-in support anti-deformation component 4 is used to support the air conditioning pipe 5 during the stretching process to prevent it from bending, becoming unstable or deforming.

[0033] The movable clamping and traction assembly 2 includes a groove 21 formed on the upper surface of the base plate 1, a lead screw 22 installed in the groove 21, a drive motor 23 connected to the lead screw 22, a movable seat 24 threaded on the lead screw 22, a limiting rod 211 provided in the groove 21, and the limiting rod 211 passing through the movable seat 24.

[0034] A clamping seat 25 is fixed on the movable seat 24. The clamping seat 25 has a clamping hole 26 facing inward at one end facing the opening and closing variable diameter mold assembly 3. Several clamping bolts 27 are installed circumferentially on the side wall of the clamping hole 26. The end of the air conditioning pipe 5 to be stretched passes through the clamping hole 26 and is clamped by the clamping bolts 27.

[0035] The clamping seat 25 has a through hole 28 facing inward at the other end. The through hole 28 is connected to the clamping hole 26. An inner support rod 29 is installed through the through hole 28 and enters the air conditioning pipe 5. A sealing installation ring 210 is provided between the outer wall of the inner support rod 29 and the inner wall of the through hole 28.

[0036] Drive and transmission: The drive motor 23 drives the lead screw 22 to rotate, thereby driving the moving seat 24 to move linearly along the groove 21. The limit rod 211 ensures that the moving seat 24 moves smoothly and does not rotate.

[0037] Clamping mechanism: Multiple clamping bolts 27 are provided in the clamping hole 26 at the front end of the clamping seat 25. By tightening the clamping bolts 27, the end of the air conditioning pipe 5 is firmly clamped from all sides.

[0038] Internal support: A key improvement is the addition of an internal support rod 29 at the rear end of the clamping seat 25. The internal support rod 29 can be inserted into the air conditioning pipe 5, providing internal support during tension, effectively preventing the pipe opening from collapsing, flattening, or being damaged under strong tension, and also preventing the air conditioning pipe 5 from being flattened by the clamping bolt 27. A sealing mounting ring 210 is used to seal and secure the internal support rod 29.

[0039] As needed, appropriate sizes of inner support rods 29 and sealing rings 210 can be selected to fit air conditioning pipes 5 with different inner diameters. Clamping bolts 27 can clamp air conditioning pipes 5 with different diameters.

[0040] The opening and closing variable diameter mold assembly 3 includes a lower mold 31 and an upper mold 32. Both the lower mold 31 and the upper mold 32 are provided with connecting plates 33 and the connecting plates 33 are fixed by connecting bolts 34. A variable diameter hole 35 is formed between the connecting end faces of the lower mold 31 and the upper mold 32.

[0041] The bottom of the lower mold 31 is provided with a base 36, which is fixed to the base plate 1 by fastening bolts 37.

[0042] Split design: The mold consists of two parts, a lower mold 31 and an upper mold 32, which are closed and fixed by a connecting plate 33 and a connecting bolt 34. This open and close design makes it very convenient to insert the tube and remove the part without having to put it on from the end of the tube.

[0043] Forming core: After the lower mold 31 and the upper mold 32 are closed, their inner cavities together form the final diameter-changing hole 35. When the air conditioning pipe 5 passes through this hole, it is forcibly stretched or squeezed to the target diameter and shape.

[0044] The plug-in type anti-deformation support assembly 4 includes a support base 41 with a support hole 42 through it. The diameter of the support hole 42 is the same as the diameter of the air conditioning pipe 5 before the diameter change, and the air conditioning pipe 5 passes through the support hole 42.

[0045] The bottom of the support base 41 is provided with a plug post 43, and the base plate 1 is provided with a plug hole, and the plug post 43 is inserted into the corresponding plug hole.

[0046] The support hole 42 on the support base 41 provides sliding support for the original pipe without diameter change. During the stretching process of the long pipe, it prevents the pipe from bending or shaking due to its own weight or axial pressure, ensuring the stability of the stretching process and uniform diameter change.

[0047] Flexible arrangement: The support base 41 engages with the insertion hole on the base plate 1 via the insertion post 43 at the bottom. This insertion structure allows users to flexibly adjust the number and position of the support points according to the length and rigidity of the pipe.

[0048] When using this utility model, one end of the air conditioning pipe 5 is first processed to the required size and passed through the diameter change hole 35 of the opening and closing diameter change mold assembly 3, and then clamped and stretched to the required diameter by the movable clamping and traction assembly 2.

[0049] This utility model integrates clamping, traction, diameter changing and support functions into one unit, and realizes automated stretching through drive motor 23, thereby improving processing efficiency and consistency.

[0050] This utility model has outstanding anti-deformation capabilities: the inner support rod 29 solves the problem of local deformation at the pipe end clamping point; multiple adjustable support points ensure the straightness and stability of the long pipe throughout the entire processing.

[0051] This utility model is easy to operate: the opening and closing design of the mold simplifies the clamping process and makes it easy to change to a suitable mold.

[0052] The plug-in design of the support component of this utility model facilitates adjustment and layout.

[0053] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A tensioning device for reducing the diameter of an air conditioning pipe, characterized in that, Includes a base plate (1), on the upper surface of the base plate (1) a movable clamping and traction assembly (2), and on the upper surface of the base plate (1) on one side of the movable clamping and traction assembly (2) a hinged variable diameter mold assembly (3) and several plug-in support anti-deformation assemblies (4).

2. The tensioning device for reducing the diameter of an air conditioning pipe according to claim 1, characterized in that, The movable clamping and traction assembly (2) includes a groove (21) on the upper surface of the base plate (1), a lead screw (22) is installed in the groove (21), the lead screw (22) is connected to a drive motor (23), a movable seat (24) is threaded on the lead screw (22), a clamping seat (25) is fixed on the movable seat (24), and a clamping hole (26) is opened inward on one end of the clamping seat (25) facing the opening and closing variable diameter mold assembly (3). Several clamping bolts (27) are installed circumferentially on the side wall of the clamping hole (26), and the end of the air conditioning pipe (5) to be stretched passes through the clamping hole (26) and is clamped by the clamping bolts (27).

3. The tensioning device for changing the diameter of an air conditioning pipe according to claim 2, characterized in that, The clamping seat (25) has a through hole (28) facing inward at the other end. The through hole (28) is connected to the clamping hole (26). An inner support rod (29) is installed through the through hole (28). The inner support rod (29) is inserted into the air conditioning pipe (5). A sealing installation ring (210) is provided between the outer wall of the inner support rod (29) and the inner wall of the through hole (28).

4. The tensioning device for changing the diameter of an air conditioning pipe according to claim 3, characterized in that, A limiting rod (211) is provided in the groove (21), and the limiting rod (211) passes through the movable seat (24).

5. A tensioning device for changing the diameter of an air conditioning pipe according to claim 1, characterized in that, The opening and closing variable diameter mold assembly (3) includes a lower mold (31) and an upper mold (32). The connecting end faces of the lower mold (31) and the upper mold (32) are provided with connecting plates (33) and the connecting plates (33) are fixed by connecting bolts (34). A variable diameter hole (35) is formed between the connecting end faces of the lower mold (31) and the upper mold (32).

6. The tensioning device for changing the diameter of an air conditioning pipe according to claim 5, characterized in that, The bottom of the lower mold (31) is provided with a base (36), which is fixed to the base plate (1) by fastening bolts (37).

7. A tensioning device for changing the diameter of an air conditioning pipe according to claim 1, characterized in that, The plug-in support anti-deformation component (4) includes a support base (41), and a support hole (42) is provided through the support base (41). The diameter of the support hole (42) is the same as the diameter of the air conditioning pipe (5) before the diameter change, and the air conditioning pipe (5) is inserted into the support hole (42).

8. A tensioning device for changing the diameter of an air conditioning pipe according to claim 7, characterized in that, The bottom of the support base (41) is provided with a plug-in post (43), and the base plate (1) is provided with a plug-in hole. The plug-in post (43) is inserted into the corresponding plug-in hole.

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