Expanding device and method

Abstract

A flaring device and method for flaring a copper tube, comprising a bracket assembly and a flaring assembly mounted on the bracket assembly, the flaring device further comprising a pressure assembly and a fixing assembly, the pressure assembly being slidably mounted on the bracket assembly and abutting against the flaring assembly to apply pressure to the flaring assembly, the fixing assembly being slidably mounted on the bracket assembly to fix the copper tube and sleeve the copper tube on the flaring assembly. The flaring device and method flare a plurality of the copper tubes simultaneously, effectively improving production efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of air-conditioning manufacturing, and in particular to a flaring device and method. Background Art

[0002] In the production and manufacturing of air conditioners, in order to facilitate the connection between copper pipes and / or parts, the copper pipes need to be expanded. In the existing copper pipe expanding technology, the copper pipe mouth is generally manually aligned with the conical head of the expander to squeeze the copper pipe mouth into a trumpet. Only one copper pipe can be operated at a time, and the expanding process is extremely cumbersome. At the same time, manual expansion is also prone to expansion failure due to strength and accuracy problems, resulting in the scrapping of the copper pipe. The above reasons cause the copper pipe expansion to be time-consuming and inefficient. And after the copper pipe is expanded, it is also necessary to test the air tightness of the copper pipe expansion. In the existing copper pipe processing, the expanded copper pipe needs to be transferred to the testing equipment for testing, and the production efficiency is low. Summary of the invention

[0003] In view of this, it is necessary to provide a flaring device and method that can improve production efficiency.

[0004] In one embodiment of the present application, a expanding device is provided for expanding a copper tube, comprising a bracket assembly and a expanding assembly installed on the bracket assembly. The expanding device also includes a pressure-applying assembly and a fixing assembly. The pressure-applying assembly is slidably installed on the bracket assembly and abuts against the expanding assembly to apply pressure to the expanding assembly. The fixing assembly is slidably installed on the bracket assembly to fix the copper tube and sleeve the copper tube on the expanding assembly.

[0005] In some embodiments of the present application, the bracket assembly includes a support frame and a bearing plate, the bearing plate is fixed between the support frames, and the expansion assembly is installed on the bearing plate.

[0006] In some embodiments of the present application, the expansion assembly includes an expansion head, which includes a base and a petal assembly, the base is mounted on the supporting plate, one end of the petal assembly is clamped in the base, and the other end is located outside the base and facing the fixed assembly.

[0007] In some embodiments of the present application, a conical cavity is provided at the end of the petal assembly, the petal assembly includes a plurality of expansion tube petals evenly arranged along the axis of the petal assembly, and the pressure-applying assembly is slidably arranged in the conical cavity.

[0008] In some embodiments of the present application, the pressure assembly includes a first sliding plate and a flaring pin, wherein both ends of the first sliding plate are slidably connected between the support frames, and the flaring pin is installed on the first sliding plate, and each of the flaring pins passes through the supporting plate and is slidably disposed in the conical cavity.

[0009] In some embodiments of the present application, the fixing assembly includes a second sliding plate and a fixing tube, both ends of the second sliding plate are slidably connected between the support frames, the fixing tube is installed on the second sliding plate, and the fixing tube is coaxially arranged with the petal assembly.

[0010] In some embodiments of the present application, the expansion device also includes a detection component installed in the fixed component, the detection component includes an air pipe and a pressure sensor, one end of the air pipe is connected to the fixed pipe, and a control valve is provided on the air pipe to adjust the air supply or sealing of the air pipe, and the pressure sensor is installed on the wall of the fixed pipe.

[0011] In some embodiments of the present application, the expansion device further includes a buffer pad, which is respectively arranged on a side of the base facing the petal assembly and a side of the second sliding plate facing the fixed tube.

[0012] In some embodiments of the present application, a sealing ring is provided between the flaring pin and the bearing plate.

[0013] In one embodiment of the present application, a flaring method is provided, using the above-mentioned flaring device, comprising:

[0014] Connecting a plurality of copper tubes to the fixed tube in sequence;

[0015] The second sliding plate is driven to move toward the bearing plate, and the copper tube is fixed between the second sliding plate and the tube expansion head;

[0016] The first sliding plate is driven to move so that the expansion pin applies pressure to the petal assembly, and the plurality of expanded petals are separated radially along the petal assembly, and the copper tube sleeved on the petal assembly is expanded;

[0017] After a quantitative test gas is delivered into the copper tube through the gas pipe, the seal of the control valve is adjusted and the change of the air pressure in the copper tube is detected by the pressure sensor to determine whether the test gas in the copper tube escapes to detect the sealing of the copper tube.

[0018] In the above-mentioned expanding device and method, the expanding component, the pressure-applying component and the fixing component are used to expand a plurality of copper tubes at the same time, thereby effectively improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of a widening device in one embodiment of the present application.

[0020] Figure 2 It is a schematic structural diagram of a flaring assembly in one embodiment of the present application.

[0021] Figure 3 It is a schematic flow chart of a flaring method in one embodiment of the present application.

[0022] Main component symbols

[0023]

[0024]

[0025] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present application, the present application is described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the features in the implementation methods of the present application can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the present application. The described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the embodiments of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the technical field of the embodiments of the present application. The terms used in the specification of the present application are only for the purpose of describing specific implementation methods and are not intended to limit the embodiments of the present application.

[0029] An embodiment of the present application provides a expanding device for expanding a copper tube, comprising a bracket assembly and a expanding assembly installed on the bracket assembly. The expanding device also includes a pressure-applying assembly and a fixing assembly. The pressure-applying assembly is slidably installed on the bracket assembly and abuts against the expanding assembly to apply pressure to the expanding assembly. The fixing assembly is slidably installed on the bracket assembly to fix the copper tube and sleeve the copper tube on the expanding assembly.

[0030] The embodiment of the present application provides a flaring method, using the above-mentioned flaring device, comprising:

[0031] Connecting a plurality of copper tubes to the fixed tube in sequence;

[0032] The second sliding plate is driven to move toward the bearing plate, and the copper tube is fixed between the second sliding plate and the tube expansion head;

[0033] The first sliding plate is driven to move so that the expansion pin applies pressure to the petal assembly, and the plurality of expanded petals are separated radially along the petal assembly, and the copper tube sleeved on the petal assembly is expanded;

[0034] After a quantitative test gas is delivered into the copper tube through the gas pipe, the seal of the control valve is adjusted and the change of the air pressure in the copper tube is detected by the pressure sensor to determine whether the test gas in the copper tube escapes to detect the sealing of the copper tube.

[0035] In the above-mentioned expanding device and method, the multiple copper tubes are expanded simultaneously by the expanding component, the pressure component and the fixing component, and then the copper tubes are sealed and tested simultaneously by the detection component, thereby avoiding the circulation process of the copper tubes and effectively improving the production efficiency.

[0036] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] See also Figure 1 A flaring device 100 is used for flaring a copper tube 90. It is understandable that the flaring device 100 can also flare pipes of other materials. The flaring device 100 includes a bracket assembly 10, a flaring assembly 20, a pressure assembly 30, a fixing assembly 40 and a detection assembly 50. The flaring assembly 20 is mounted on the bracket assembly 10. The pressure assembly 30 is slidably mounted on one side of the flaring assembly 20 and abuts against the flaring assembly 20 to apply pressure to the flaring assembly 20 to flare the copper tube 90. The fixing assembly 40 is slidably mounted on the bracket assembly 10 and faces the flaring assembly 20 to fix the copper tube 90. The detection assembly 50 is installed in the fixing assembly 40 to detect the sealing of the copper tube 90.

[0038] The bracket assembly 10 includes a support frame 11 and a bearing plate 12. The support frames 11 are arranged opposite to each other, and the bearing plate 12 is fixed between the support frames 11 to install the flaring assembly 20. Specifically, the bearing plate 12 is perpendicular to the length direction of the support frame 11. The pressure assembly 30 is slidably installed on one side of the bearing plate 12 and abuts against the flaring assembly 20 to apply pressure to the flaring assembly 20 by sliding. The fixing assembly 40 is slidably installed on the side of the bearing plate 12 away from the pressure assembly 30 to fix the copper tube 90 on the flaring assembly 20.

[0039] In one embodiment, both ends of the pressure assembly 30 and the fixing assembly 40 are slidably connected between the support frames 11 through slide rails 13. In other embodiments, both ends of the pressure assembly 30 and the fixing assembly 40 can be slidably connected between the support frames 11 through slide grooves or guide wheels. The expansion assembly 20 is mounted on the supporting plate 12 to expand the copper tube 90.

[0040] Please also read Figure 1 and Figure 2 The expansion assembly 20 includes an expansion head 21, which is sequentially installed on the carrier plate 12 along the length direction of the carrier plate 12 to expand multiple copper tubes 90 at the same time, thereby improving production efficiency. The expansion head 21 includes a base 211 and a petal assembly 212, and the base 211 is sequentially installed on the carrier plate 12. One end of the petal assembly 212 is clamped in the base 211, and the other end is located outside the base 211 and faces the fixed assembly 40. A conical cavity 213 is provided at the end of the petal assembly 212 away from the fixed assembly 40, and the petal assembly 212 includes a plurality of expansion petals 2121 evenly arranged along the axis of the petal assembly 212. One end of the pressure-applying assembly 30 is slidably disposed in the conical cavity 213, and the pressure-applying assembly 30 applies pressure to the petal assembly 212, so that the plurality of expansion petals 2121 are separated radially along the petal assembly 212, so as to expand the copper tube 90 sleeved on the petal assembly 212. In one embodiment, the number of the expansion heads 21 is three, so as to expand three copper tubes 90 at the same time.

[0041] The pressure-applying assembly 30 includes a first sliding plate 31, a flaring pin 32 and a first cylinder 33. The two ends of the first sliding plate 31 are slidably connected between the support frames 11 through the slide rails 13. The flaring pins 32 are mounted on the first sliding plate 31, and each of the flaring pins 32 passes through the bearing plate 12 and is slidably disposed in the conical cavity 213. By moving the first sliding plate 31, the flaring pins 32 apply pressure to the corresponding petal assembly 212, thereby causing a plurality of expanded tube petals 2121 to be radially separated along the petal assembly 212. One end of the flaring pin 32 facing the conical cavity 213 is a conical surface, so that the petal assembly 212 is subjected to uniform force when pressure is applied.

[0042] The first cylinder 33 is installed on the support frame 11 , and the piston rod of the first cylinder 33 is connected to the first sliding plate 31 to drive the first sliding plate 31 to move, thereby controlling the flaring pin 32 to apply pressure to the petal assembly 212 .

[0043] The fixing assembly 40 includes a second sliding plate 41, a fixing pipe 42 and a second cylinder 43. The two ends of the second sliding plate 41 are slidably connected between the support frames 11 through the slide rails 13. The fixing pipe 42 is installed on the second sliding plate 41, and one end of the fixing pipe 42 extends to the corresponding petal assembly 212. The fixing pipe 42 is coaxially arranged with the petal assembly 212 to sleeve and fix the copper tube 90. The copper tube 90 is fixed between the second sliding plate 41 and the petal assembly 212 by moving the second sliding plate 41, so that the petal assembly 212 expands the copper tube 90 and avoids bending due to the force on the two ends of the copper tube 90.

[0044] The second cylinder 43 is installed on the support frame 11 , and the piston rod of the second cylinder 43 is connected to the second sliding plate 41 to drive the second sliding plate 41 to move, thereby fixing the copper tube 90 between the second sliding plate 41 and the petal assembly 212 .

[0045] The detection component 50 includes a gas pipe 51, a pressure sensor 52, an indicator light 53 and a controller (not shown). One end of the gas pipe 51 is connected to the fixed pipe 42, and the other end is connected to the gas delivery device to deliver the detection gas to the fixed pipe 42. A control valve (not shown) is provided on the gas pipe 51 to adjust the gas delivery or sealing of the gas pipe 51. The pressure sensor 52 is installed on the wall of the fixed pipe 42 to detect the pressure value in the copper tube 90 fixed between the second sliding plate 41 and the petal assembly 212. Specifically, the pressure sensor 52 is installed on the wall of the fixed pipe 42 away from the end of the second sliding plate 41. The pressure sensor 52 is also electrically connected to the controller to analyze the sealing of the copper tube 90 through the pressure in the copper tube 90.

[0046] The indicator lights 53 are installed on the second sliding plate 41, and each indicator light 53 corresponds to one fixed tube 42. The indicator lights 53 are also electrically connected to the controller. When the controller analyzes that the sealing of the copper tube 90 is abnormal, the corresponding indicator light 53 changes color or flashes to alert the staff.

[0047] When the detection component 50 is detecting, the openings at both ends of the copper tube 90 are respectively in contact with the expansion head 21 and the second sliding plate 41, and are in a sealed state. After a quantitative detection gas is delivered to the copper tube 90 through the gas delivery pipe 51, the seal of the control valve is adjusted, and the pressure sensor 52 is used to detect the change in the air pressure in the copper tube 90, so as to determine whether the detection gas in the copper tube 90 escapes to detect the sealing of the copper tube 90. Specifically, if the pressure sensor 52 detects that the air pressure in the copper tube 90 decreases, it means that the detection gas escapes, and further indicates that the sealing of the copper tube 90 is unqualified. If the pressure sensor 52 detects that the air pressure in the copper tube 90 remains unchanged, it means that no detection gas escapes, and further indicates that the sealing of the copper tube 90 is qualified.

[0048] It is understandable that when the openings at both ends of the copper tube 90 abut against the expansion head 21 and the second sliding plate 41 respectively and the sealing effect cannot be ensured, the sealing of the copper tube 90 can be judged by detecting the speed of the air pressure reduction in the copper tube 90. Specifically, if the pressure sensor 52 detects that the change range of the air pressure reduction speed in the copper tube 90 is small, it means that the sealing of the copper tube 90 is qualified. If the pressure sensor 52 detects that the change range of the air pressure reduction speed in the copper tube 90 is large, it means that the detection gas escapes, and further indicates that the sealing of the copper tube 90 is unqualified.

[0049] The expansion device 100 further includes a buffer pad 60, which is respectively arranged on a side of the base 211 facing the petal assembly 212 and a side of the second sliding plate 41 facing the fixed tube 42, so as to buffer and seal the openings at both ends of the copper tube 90 fixed between the second sliding plate 41 and the petal assembly 212, so as to facilitate the pressure sensor 52 to measure the pressure value in the copper tube 90. A sealing ring 14 is arranged between the expansion pin 32 and the bearing plate 12 to prevent the detection gas from escaping from the expansion head 21, so as to facilitate the pressure sensor 52 to measure the pressure value in the copper tube 90. In one embodiment, the buffer pad 60 and the sealing ring 14 are made of rubber material.

[0050] Please also read Figure 3 The present application also provides a method for expanding a mouth using the expanding device 100, comprising the following steps:

[0051] S1, sleeve a plurality of copper tubes 90 onto the fixed tube 42 in sequence;

[0052] Specifically in one embodiment, the diameters of the fixing tubes 42 may be different so as to fix the copper tubes 90 of different diameters.

[0053] S2, driving the second sliding plate 41 to move toward the bearing plate 12, fixing the copper tube 90 between the second sliding plate 41 and the expansion head 21;

[0054] Specifically, in one embodiment, the second cylinder 43 is used to drive the second sliding plate 41 to move, so that the openings at both ends of the copper tube 90 are respectively abutted against the expansion head 21 and the buffer pad 60 on the second sliding plate 41, and the buffer pad 60 can effectively buffer and seal the openings at both ends of the copper tube 90.

[0055] S3, driving the first sliding plate 31 to move so that the expansion pin applies pressure to the petal assembly 212, and the plurality of expansion petals 2121 are separated radially along the petal assembly 212, and the copper tube 90 sleeved on the petal assembly 212 is expanded;

[0056] S4, after a quantitative detection gas is delivered into the copper tube 90 through the gas delivery pipe 51, the control valve seal is adjusted, and the change of the air pressure in the copper tube 90 is detected by the pressure sensor 52, so as to determine whether the detection gas in the copper tube 90 escapes to detect the sealing of the copper tube 90.

[0057] In one specific embodiment, if the pressure sensor 52 detects that the air pressure in the copper tube 90 decreases, it means that the detection gas escapes, and further indicates that the sealing of the copper tube 90 is unqualified. If the pressure sensor 52 detects that the air pressure in the copper tube 90 remains unchanged, it means that no detection gas escapes, and further indicates that the sealing of the copper tube 90 is qualified. When the controller analyzes that the sealing of the copper tube 90 is abnormal, the corresponding indicator light 53 changes color or flashes to prompt the staff.

[0058] In the above-mentioned expanding device 100 and method, the multiple copper tubes 90 are expanded simultaneously through the expanding component 20, the pressure component 30 and the fixing component 40, and then the copper tubes 90 are sealed and tested at the same time through the detection component 50, thereby avoiding the circulation process of the copper tubes and effectively improving the production efficiency.

[0059] The above implementation modes are only used to illustrate the technical solutions of the embodiments of the present application and are not intended to limit the present application. Although the embodiments of the present application are described in detail with reference to the above preferred implementation modes, those skilled in the art should understand that the technical solutions of the embodiments of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A flaring device for flaring a copper tube, comprising a bracket assembly and a flaring assembly mounted on the bracket assembly, characterized in that: The expansion device further comprises a pressure component and a fixing component, wherein the pressure component is slidably mounted on the bracket component and abuts against the expansion component to apply pressure to the expansion component, and the fixing component is slidably mounted on the bracket component to fix the copper tube and sleeve the copper tube onto the expansion component; The bracket assembly includes a support frame and a bearing plate, the bearing plate is fixed between the support frames, and the flaring assembly is mounted on the bearing plate; The flaring assembly includes an expansion head, which includes a base and a petal assembly, wherein the base is mounted on the bearing plate, one end of the petal assembly is clamped in the base, and the other end is located outside the base and faces the fixing assembly; The fixing assembly includes a second sliding plate and a fixing tube, the two ends of the second sliding plate are slidably connected between the support frames, the fixing tube is installed on the second sliding plate, the fixing tube is coaxially arranged with the petal assembly, the second sliding plate and the expansion head respectively abut against the openings at the two ends of the copper tube, so that the copper tube is in a sealed state; The expanding device also includes a detection component installed in the fixed component, the detection component includes an air pipe and a pressure sensor, one end of the air pipe is connected to the fixed pipe, a control valve is provided on the air pipe to adjust the air supply or sealing of the air pipe, and the pressure sensor is installed on the wall of the fixed pipe.

2. The expansion device according to claim 1, characterized in that: A conical cavity is provided at the end of the petal assembly. The petal assembly comprises a plurality of expansion tube petals evenly arranged along the axis of the petal assembly. The pressure-applying assembly is slidably arranged in the conical cavity.

3. The expansion device according to claim 2, characterized in that: The pressure-applying assembly includes a first sliding plate and a flaring pin. Both ends of the first sliding plate are slidably connected between the support frames. The flaring pin is mounted on the first sliding plate. Each flaring pin passes through the bearing plate and is slidably disposed in the conical cavity.

4. The expansion device according to claim 3, characterized in that: The expansion device further comprises a buffer pad, which is respectively arranged on a side of the base facing the petal assembly and a side of the second sliding plate facing the fixed pipe.

5. The expansion device according to claim 4, characterized in that: A sealing ring is provided between the flaring pin and the bearing plate.

6. A method for expanding a mouth, using the expanding device as claimed in any one of claims 3 to 5, characterized in that: include: Connecting a plurality of copper tubes to the fixed tube in sequence; The second sliding plate is driven to move toward the bearing plate, and the copper tube is fixed between the second sliding plate and the tube expansion head; The first sliding plate is driven to move so that the expansion pin applies pressure to the petal assembly, and the plurality of expanded petals are separated radially along the petal assembly, and the copper tube sleeved on the petal assembly is expanded; After a quantitative test gas is delivered into the copper tube through the gas pipe, the seal of the control valve is adjusted and the change of the air pressure in the copper tube is detected by the pressure sensor to determine whether the test gas in the copper tube escapes to detect the sealing of the copper tube.

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