End pipe expanding device

Abstract

An end pipe expanding device comprises a bottom plate, a plurality of supporting rods are installed on the bottom plate, an upper plate is installed at the upper ends of the supporting rods, a hydraulic cylinder is installed on the upper plate, a lower pressing plate is installed at the lower end of the hydraulic cylinder, a plurality of installation discs are installed at the lower end of the lower pressing plate, inner columns are installed at the lower ends of the installation discs, conical columns are formed at the lower ends of the inner columns, and lower columns are arranged at the lower ends of the conical columns. A jacking mechanism is installed on the bottom plate, a middle plate is arranged at the upper end of the jacking mechanism, the supporting rod penetrates through the middle plate, holes are formed in the middle plate, the holes correspond to the conical columns one to one, a plurality of installation rings are installed on the middle plate, lower forming pieces are arranged on the installation rings, the lower forming pieces correspond to the holes one to one, upper holes are formed in the upper ends of the lower forming pieces, and the upper holes are communicated with the lower forming pieces. A taper hole is formed in the lower end of the upper hole, the lower end of the taper hole is a small end, and a lower hole is formed in the lower end of the taper hole. According to the pipe expanding device, pipe expanding operation of the copper pipe is facilitated, the copper pipe can be positioned during pipe expanding, and after pipe expanding is completed, the copper pipe can be taken out conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of heating tube forming, in particular to an end tube expanding device. Background Art

[0002] The heating tube is used in the natural gas water heater to receive heat and heat the water passing through it. When processing the heating tube, it is necessary to expand the end of the tube to facilitate the insertion and welding of the U-shaped tube. At present, when expanding the tube, the operator usually heats the end of the copper tube first, and then places it on the tube expansion device for expansion. After the expansion is completed, the copper tube is taken out. This method requires the operator to take and place during the expansion, and because the end of the copper tube is heated, it is easy to cause burns to the operator, and there is also the problem of inconvenience in taking out the copper tube. Utility Model Content

[0003] The utility model provides an end tube expansion device to solve the above-mentioned deficiencies of the prior art, facilitates the taking out of the copper tube and has strong practicality.

[0004] In order to achieve the purpose of this utility model, the following technologies are proposed:

[0005] A pipe expansion device at the end comprises a base plate, a plurality of support rods are installed on the base plate, an upper plate is installed on the upper end of the support rods, a hydraulic cylinder is installed on the upper plate, a lower pressure plate is installed on the lower end of the hydraulic cylinder, a plurality of mounting plates are installed on the lower end of the lower pressure plate, an inner column is installed on the lower end of the mounting plate, a conical column is formed at the lower end of the inner column, a lower column is provided at the lower end of the conical column, the lower end of the conical column is a small end, a jacking mechanism is installed on the base plate, a middle plate is provided on the upper end of the jacking mechanism, the support rods pass through the middle plate, a plurality of holes are opened on the middle plate, the holes and the conical columns are in a one-to-one correspondence, a plurality of mounting rings are installed on the middle plate, a lower molding is provided on the mounting ring, the lower molding is in a one-to-one correspondence with the holes, an upper end of the lower molding is opened on the upper end of the upper hole, a conical hole is formed at the lower end of the upper hole, the lower end of the conical hole is a small end, and a lower hole is formed at the lower end of the conical hole. The middle plate is supported by a lifting mechanism, and can be kept at a certain height when expanding the tube. After the expansion is completed, the middle plate can be moved downward to expose the upper end of the copper tube, which is convenient for the subsequent removal of the copper tube. The lower forming part is provided with a spiral coil on its outer side. When the coil is energized, the copper tube can be heated by the generated eddy current. After heating, the end of the copper tube can be expanded by the inner column, etc., and the above-mentioned components can be used to expand multiple copper tubes, thereby improving the efficiency of tube expansion.

[0006] Furthermore, a lower plate is installed on the bottom plate, and a positioning column is arranged on the lower plate. The positioning column and the hole are in a one-to-one correspondence. The positioning column plays a positioning role for the copper tube to ensure the accuracy of the tube expansion.

[0007] Furthermore, a base plate is installed on one side of the bottom plate, and end plates are installed at both ends of the base plate, and a pair of guide rods are arranged between the end plates, and a motor is installed on one of the end plates, and a screw is connected to the output shaft of the motor, and the threads at both ends of the screw are rotated in opposite directions, and movable blocks are arranged at both ends of the screw, and a protrusion is arranged on the movable block, and the protrusion is hinged with a connecting plate, and a downward extending protrusion is arranged at the other end of the connecting plate, and a mounting seat is installed at the upper end of the downward extending protrusion, and the mounting seat is installed on the middle plate. Through the synchronous movement of the two movable blocks, it is convenient to adjust the angle between the connecting plates, and then it is convenient to adjust the height of the middle plate, and this support method has strong stability, thereby providing strong support for the stamping operation during pipe expansion to ensure the pipe expansion effect.

[0008] The advantages of the above technical solution are:

[0009] The utility model facilitates the expansion operation of the copper tube, can position the copper tube during expansion, and is convenient for taking out the copper tube after the expansion is completed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0011] Figure 1 A three-dimensional structural diagram of one embodiment is shown.

[0012] Figure 2 The structural diagram of the positioning column and the lower molding is shown. DETAILED DESCRIPTION

[0013] like Figure 1~Figure 2 As shown, an end pipe expansion device includes a base plate 1, a plurality of support rods 2 are installed on the base plate 1, an upper plate 20 is installed on the upper end of the support rods 2, a hydraulic cylinder 21 is installed on the upper plate 20, a lower pressure plate 22 is installed on the lower end of the hydraulic cylinder 21, a plurality of mounting plates 23 are installed on the lower end of the lower pressure plate 22, an inner column 24 is installed on the lower end of the mounting plate 23, a conical column 25 is formed at the lower end of the inner column 24, a lower column 26 is provided at the lower end of the conical column 25, and the lower end of the conical column 25 is a small end. A lifting mechanism is installed on the bottom plate 1, and a middle plate 39 is provided at the upper end of the lifting mechanism. The support rod 2 passes through the middle plate 39, and a plurality of holes are provided on the middle plate 39, and the holes are in a one-to-one correspondence with the cone column 25. A plurality of mounting rings 4 are installed on the middle plate 39, and a lower molding 40 is provided on the mounting ring 4, and the lower molding 40 is in a one-to-one correspondence with the holes. An upper hole 41 is provided at the upper end of the lower molding 40, and a cone hole 42 is formed at the lower end of the upper hole 41, and the lower end of the cone hole 42 is a small end, and a lower hole 43 is formed at the lower end of the cone hole 42. In addition, a lower plate 10 is installed on the bottom plate 1, and a positioning column 11 is provided on the lower plate 10, and the positioning column 11 is in a one-to-one correspondence with the holes.

[0014] The lifting mechanism includes a base plate 3 arranged on the bottom plate 1, and end plates 30 are respectively installed at both ends of the base plate 3, and a pair of guide rods 31 are provided between the end plates 30. A motor 32 is installed on one of the end plates 30, and a screw rod 33 is connected to the output shaft of the motor 32. The threads at both ends of the screw rod 33 are rotated in opposite directions. Movable blocks 34 are respectively provided at both ends of the screw rod 33, and a protrusion 35 is provided on the movable block 34. The protrusion 35 is hinged with a connecting plate 36, and the other end of the connecting plate 36 is provided with a downward extending protrusion plate 37, and a mounting seat 38 is installed on the upper end of the downward extending protrusion plate 37, and the mounting seat 38 is installed on the middle plate 39.

[0015] When operating this embodiment, the operator adjusts the height of the middle plate 39 according to the length of the copper tube through the jacking mechanism. After the adjustment, the operator inserts the copper tube from the lower molded part 40 until the lower end of the copper tube is positioned by the positioning column 11. After positioning, the spiral coil is energized and the copper tube is heated. After heating for a period of time, the hydraulic cylinder 21 is started to move the cone column 25 and other components downward, and the copper tube is expanded through the cone column 25 and the inner column 24 thereon. After the expansion is completed, the jacking mechanism is started again to move the middle plate 39 downward, and then the copper tube is taken out of the middle plate 39.

[0016] When the lifting mechanism adjusts the height of the middle plate 39, the motor 32 is started, and the screw rod 33 is rotated under the drive of the motor 32. The rotation of the screw rod 33 will drive the two movable blocks 34 thereon to move relative to each other, and the movement of the movable blocks 34 will increase or decrease the angle between the two connecting plates 36. When the angle between the connecting plates 36 increases, the middle plate 39 will move downward, and when the angle between the connecting plates 36 decreases, the middle plate 39 will move upward.

[0017] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the utility model. Thus, if these modifications and variations of the utility model fall within the scope of the claims of the utility model and their equivalents, the utility model is also intended to include these modifications and variations.

Claims

1. An end expansion device, characterized in that: The invention comprises a bottom plate (1), a plurality of support rods (2) are mounted on the bottom plate (1), an upper plate (20) is mounted on the upper end of the support rods (2), a hydraulic cylinder (21) is mounted on the upper plate (20), a lower pressure plate (22) is mounted on the lower end of the hydraulic cylinder (21), a plurality of mounting plates (23) are mounted on the lower end of the lower pressure plate (22), an inner column (24) is mounted on the lower end of the mounting plate (23), a conical column (25) is formed at the lower end of the inner column (24), a lower column (26) is provided at the lower end of the conical column (25), and the lower end of the conical column (25) is a small end; A lifting mechanism is installed on the bottom plate (1), a middle plate (39) is provided at the upper end of the lifting mechanism, a support rod (2) passes through the middle plate (39), a plurality of holes are provided on the middle plate (39), and the holes are in a one-to-one correspondence with the cone columns (25), a plurality of mounting rings (4) are installed on the middle plate (39), a lower forming member (40) is provided on the mounting ring (4), and the lower forming member (40) is in a one-to-one correspondence with the holes, an upper hole (41) is provided at the upper end of the lower forming member (40), a cone hole (42) is formed at the lower end of the upper hole (41), the lower end of the cone hole (42) is a small end, and a lower hole (43) is formed at the lower end of the cone hole (42).

2. The end tube expansion device according to claim 1, characterized in that: A lower plate (10) is mounted on the bottom plate (1), and a positioning column (11) is provided on the lower plate (10). The positioning column (11) and the hole are in a one-to-one correspondence relationship.

3. The end tube expansion device according to claim 1, characterized in that: The lifting mechanism comprises a base plate (3) arranged on a bottom plate (1), end plates (30) are respectively installed at both ends of the base plate (3), a pair of guide rods (31) are arranged between the end plates (30), a motor (32) is installed on one of the end plates (30), a screw rod (33) is connected to the output shaft of the motor (32), the screw threads at both ends of the screw rod (33) are rotated in opposite directions, movable blocks (34) are respectively arranged at both ends of the screw rod (33), a protrusion (35) is arranged on the movable block (34), a connecting plate (36) is hingedly connected to the protrusion (35), a downward extending protrusion plate (37) is arranged at the other end of the connecting plate (36), a mounting seat (38) is installed at the upper end of the downward extending protrusion plate (37), and the mounting seat (38) is installed on the middle plate (39).

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