TWI725708B - Pipe flaring device - Google Patents

Abstract

A pipe flaring device connects with a power to expand a caliber of a tube. The pipe flaring device has a box, a clamping tool, an expanding member, a feeding member and a connector. The box has a space and a hole. The clamping tool connects with the box and fixes the tube. The expanding member and the feeding member are provided in the space of the box. The expanding member has a main axle and an expanding tool. The main axle connects with the power. The connector is connected with the expanding member and the feeding member. When the connector connects with the expanding member and the feeding member, the expanding member would be moved by the feeding member. When the connector not connects with the expanding member and the feeding member, the expanding member would be rolled but would not be moved.

Description

Expanding device

The present invention relates to the technical field of a pipe expansion, in particular to a pipe expansion device.

Generally, the expansion device is generally used for air-conditioning installation. The air-conditioning installation is divided into internal and external unit installations, which are connected through a copper pipe to convey the air-conditioning. In order to ensure that the refrigerant does not leak at the joint of the bell mouth of the internal and external machines, the installer must use a pipe expansion device to expand the pipe mouth to ensure the tightness of the connected pipe mouth.

Generally, the pipe expanding device is performed manually, and the pipe expanding device is usually rotated manually to drive a pipe expanding unit to perform a pipe expanding action. The entire expansion process must be operated by personnel, and the force exerted is relatively large, which is not easy for women to operate.

In addition, there is also a kind of expansion device that is carried out by power input. After the expansion of the power pipe is completed, the power expansion device must be stopped by a person before the power expansion device is stopped. Personnel are required to keep an eye on the operation, and excessive pipe expansion may cause damage to the structure of the pipe body, which may result in a situation where the pipe body cannot be tightly connected when the pipe body is connected.

Therefore, most users choose the power expanding device to expand the pipe, but the power expanding device lacks an appropriate mechanism to stop its expanding effect. Furthermore, the top core group of the tube expansion unit is easily damaged due to excessive wear.

The object of the present invention is to provide a pipe expansion device, which has the effect of disconnecting the connection after the pipe expansion is completed, so as to stop the excessive expansion of the pipe.

A pipe expanding device is used to connect to a power source to expand the pipe diameter of a pipe fitting, comprising: a housing having a first end and a second end, and an accommodating space therein; wherein, the The housing has a hole at the first end; a clamp connected to the second end of the housing for fixing the pipe; a pipe expansion piece arranged in the accommodating space of the housing and has a main shaft and A tube expanding terminal; wherein the tube expanding terminal is arranged at one end of the main shaft and is adjacent to the clamp; one end of the main shaft is adjacent to the hole of the housing, and the power source is connected through the hole to be driven by the power source. Rotation; a feeding member, which is arranged in the housing space of the housing, can reciprocate within a predetermined distance; and a connector, which connects the expansion member and the feeding member in a separable manner; when the connection When the connector is connected to the pipe expanding piece and the feeding piece, the pipe expanding piece is driven by the feeding piece to move in the accommodating space, so that the pipe expanding terminal moves toward or away from the clamp; when the connector is not When connecting the pipe expanding piece and the feeding piece, the feeding piece is separated from the pipe expanding piece, and the pipe expanding piece rotates but does not move.

In one embodiment, the connector has a column and an elastic body; the column is movably disposed on the tube expansion member; the feeding member has a connecting hole corresponding to the column; the elastic body The column is elastically pushed, so that the column extends into the connecting hole in a normal state.

In one embodiment, the column is provided with a guide groove; a pin, one end of which passes through the tube expansion member and extends into the guide groove.

In one embodiment, the end of the column facing the connecting hole has an inclined surface; the inclined surface faces a rotation direction that drives the tube expanding terminal to move to the clamp.

In an embodiment, the feeding member is provided with an external thread, and the inner side of the housing is provided with an internal thread; the external thread is engaged with the internal thread, so that when the feeding member is connected to the expansion member through the connector , The feeding member will be driven by the tube expanding member to rotate and move in the accommodating space.

In one embodiment, the external thread further has a threaded area and a flat area; the threaded area is provided at an end adjacent to the feeding member farther from the clamp, and the flat area is provided at the other end adjacent to the feeding member .

In an embodiment, the feeding member is provided with a spring to elastically press against the tube expanding member.

In one embodiment, the feeding member has a groove with a perforation at the bottom end; the main shaft of the pipe expanding member passes through the groove and the perforation of the feeding member; the main shaft of the pipe expanding member has a wall, Facing the groove; the elastic piece is sleeved on the main shaft, and its two ends respectively abut against the bottom end of the groove and the wall of the main shaft.

In an embodiment, the main shaft of the pipe expansion member has a mounting portion, the feeding member has a connecting portion corresponding to the mounting portion, and the connector is located between the connecting portion and the mounting portion; the spring elasticity Pressing against the pipe expanding piece makes the mounting part abut against the connecting part in a normal state.

In an embodiment, the connector is not connected to the pipe expansion part and the feeding part, and the installation part is separated from the connection part.

The above-mentioned technical means can solve the problem of easy over-expansion of the conventional tube, and the effect of semi-automatically stopping the expansion of the tube can be achieved through the detachment structure, so as to avoid excessive expansion of the nozzle and damage to the tube body.

In accordance with the objectives and effects of the present invention, preferred embodiments are listed below and illustrated in detail in conjunction with the drawings.

10: Shell

11: shell

12: Ring

13: Connecting parts

14: first end

15: second end

16: accommodation space

17: Buffer

18: Internal thread

20: Fixture

30: Expanding pipe fittings

31: Pedestal

32: axis

33: Spindle

34: Expansion terminal

35: Installation Department

36: Gakibe

40: Infeed

41: External thread

410: threaded area

412: Flat Zone

42: spring

43: Groove

44: Piercing

45: connecting part

46: connecting hole

50: Connector

51: Cylinder

52: Elastomer

53: Guide groove

54: pin

55: Bevel

100: power source

200: pipe fittings

Figure 1 is a perspective view of a preferred embodiment of the present invention.

Figure 2 is an exploded view of a preferred embodiment of the present invention.

Figure 3 is a cross-sectional view of a preferred embodiment of the present invention.

Fig. 4 is a schematic diagram of the pipe expanding device connected to the power end to perform pipe expanding action according to a preferred embodiment of the present invention.

Figure 5 is a partial cross-sectional view of the connector of a preferred embodiment of the present invention, showing that the connector moves due to excessive resistance.

Figure 6 is another angle partial cross-sectional view of the connector according to a preferred embodiment of the present invention, showing that the connector leaves the connecting hole due to the continuous rotation of the tube expanding member.

Please refer to FIG. 1, the present invention discloses a pipe expanding device, which can expand the pipe diameter of a pipe 200 through an external power source 100. The pipe expanding device has a housing 10, a clamp 20, a pipe expanding piece 30, a feeding piece 40, and a connector 50.

Please refer to Figures 2 and 3, the housing 10 is composed of a shell 11, a ring 12 and a connecting member 13, which is generally an ellipsoid. The casing 10 further has a first end 14, a second end 15 and an accommodating space 16. The ring 12 is arranged on the inner side of the housing 11, and an internal thread 18 is provided on the inner side surface of the ring 12. One end of the connecting member 13 is located at the second end 15 of the housing 10 for connecting the clamp 20. The first end 14 of the casing 10 further has a hole. Wherein the hole is further provided with a buffer member 17, the buffer member 17 has A mounting portion is arranged in the hole by using the mounting portion, and a part of the buffer member 17 extends into the accommodating space 16 through the hole, and the buffer member 17 is flexible.

The clamp 20 is connected to the second end 15 of the housing 10 to fix the pipe 200. The clamp 20 is a conventional structure, and its structure and connection method are all conventional ones, and will not be repeated here.

The pipe expansion member 30 is disposed in the accommodating space 16 of the housing 10. The tube expansion member 30 has a base 31, a shaft 32, a main shaft 33 and a tube expansion terminal 34. The base 31 is connected to the power source 100 through the hole of the housing 10 to be driven by the power source 100 to rotate. The shaft 32 is connected to the base 31 and at the same time rotates due to the rotation of the base 31. The expanding terminal 34 is arranged at one end of the main shaft 33 and adjacent to the clamp 20. The main shaft 33 is further provided with an installation portion 35 and a wall portion 36.

The feeding member 40 is disposed in the accommodating space 16 of the housing 10 and can reciprocate within a predetermined distance. The feeding member 40 has an external thread 41, a spring 42 and a groove 43. The external thread 41 is provided on the outer side surface of the feeding member 40 to engage with the inner thread 18 of the housing 10. The feeding member 40 will be driven to rotate by the pipe expansion member 30, and will move in the accommodating space. Move in 16. In this embodiment, the external thread can be divided into a threaded area 410 and a flat area 412, and the flat area 412 is closer to the fixture 20 than the threaded area 410. The spring 42 is sleeved on the main shaft 33, and its two ends respectively abut against the bottom end of the groove 43 and the wall portion 36 of the main shaft 33, and the spring 42 is elastically pressed against the tube expansion member 30 to provide the expansion member 30-Elasticity. The groove 43 faces the wall portion 36 of the main shaft 33, and a through hole 44 is further formed at the bottom end of the groove 43, and the main shaft 33 of the tube expansion member 30 passes through the groove 43 and the through hole 44 of the feeding member 40. The feeding member 40 further has a connecting portion 45 corresponding to the mounting portion 35 of the main shaft 33. In particular, the spring 42 elastically presses the tube expansion member 30 to make the mounting portion 35 abut against the connecting portion 45 in a normal state. In this embodiment, the feeding member 40 further has a connecting hole 46.

The connector 50 has a column 51 and an elastic body 52, and connects the expansion member 30 and the feeding member 40 in a separable manner. The column 51 is movably disposed on the mounting portion 35 of the tube expansion member 30 relative to the connecting portion 45 of the feeding member 40. The column 51 further has a guide groove 53 (see FIG. 5) formed on the outer side of the column 51, and one end of a pin 54 passes through the tube expansion member 30 and extends into the guide groove 53. The elastic body 52 elastically pushes against the column 51 so that the column 51 penetrates into the connecting hole 46 of the feeding member 40 in a normal state. In particular, the end of the column 51 facing the connecting hole 46 has an inclined surface 55; the inclined surface 55 faces the rotation direction that drives the expanding terminal 34 to move to the clamp 20.

Please refer to FIG. 4, when the pipe expanding device is connected to the power source 100, the pipe expanding member 30 can rotate in a predetermined direction. When the pipe expansion member 30 rotates, the connector 50 connects the pipe expansion member 30 and the feeding member 40 to further drive the feeding member 40. When the feeding member 40 rotates, the outer thread 41 of the feeding member 40 engages the inner thread 18 of the housing 10 and simultaneously moves in the accommodating space 16 toward the clamp 20. When the expanding terminal 34 contacts the nozzle of the pipe 200, the expanding operation starts. When the nozzle of the pipe 200 is expanded to a predetermined diameter, the expansion device will continue to rotate in the predetermined direction due to the driving of the power source 100, and the expansion terminal 34 will continue to rub against the nozzle. When the resistance received by the tube expanding terminal 34 is greater, the connector 50 will move away from the clamp 20 and the tube expanding member 30 and the feeding member 40 are not connected.

Please refer to Figures 4 to 6, when the connector 50 is not connected to the pipe expanding piece 30 and the feeding piece 40, at the same time, the pipe expanding piece 30 of the pipe expanding device is still rotating, but no longer to the direction of the clamp 20 mobile. The connector 50 can leave the connecting portion 45 via the inclined surface 55. In order to achieve a semi-automatic stop of the continuous travel of the feeding member 40, the friction between the tube expanding terminal 34 and the tube member 200 is further stopped. It should be particularly noted here that the setting direction of the inclined surface 55 must face the rotation direction that drives the expansion terminal 34 to move to the clamp 20. At the same time, the guide groove 53 and the pin 54 must be used to fix the connecting member 13 so that the column 51 cannot rotate and change its position.

When the pipe expanding device continues to rotate to make the connecting member 13 pass through the connecting hole 46 again, the elastic body 52 of the connecting member 13 will push against the column 51 and move toward the bottom end of the connecting hole 46, but the connector 50 will still move and leave the connecting hole 46 due to excessive resistance. The operation will not stop until the user stops the power source 100.

When the user needs to use the expansion device next time, he must connect the expansion device to the power source 100 and operate in the opposite direction relative to the predetermined direction to reset the position of the feeding member 40 to the original position. And for next use. In particular, during the resetting process, when the feeding member 40 travels away from the clamp 20 to a predetermined position, the external thread 41 does not engage with the internal thread 18, and the flat area 412 is used in the The predetermined position rotates in place, and the feeding member 40 no longer moves the position. In addition, the buffer member 17 can utilize the flexibility of the buffer member 17 to provide a slight buffer distance when the tube expansion member 30 returns to its position.

The present invention provides a disengagement mechanism of a power expanding device, which can prevent the power expanding device from performing excessive pipe expansion, so as to achieve the effect of semi-automatically stopping the expansion of the pipe. The present invention also provides an innovative idea for the industry to further develop the industry. Follow-up industrial ideas can also work in this direction and jointly provide more innovative ideas for the industry.

The above-mentioned embodiments are merely illustrative of the technology and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with this technology can modify and change the above-mentioned embodiments without violating the technical principle and spirit of the present invention. Therefore, the scope of protection of the rights of the present invention should be listed in the scope of patent application described later. .

10: Shell

11: shell

12: Ring

13: Connecting parts

14: first end

15: second end

16: accommodation space

17: Buffer

18: Internal thread

20: Fixture

30: Expanding pipe fittings

31: Pedestal

32: axis

33: Spindle

34: Expansion terminal

35: Installation Department

36: Gakibe

40: Infeed

41: External thread

410: threaded area

412: Flat Zone

42: spring

43: Groove

44: Piercing

45: connecting part

46: connecting hole

50: Connector

51: Cylinder

52: Elastomer

Claims (10)

A pipe expanding device is used to connect to a power source to expand the pipe diameter of a pipe fitting, comprising: a housing having a first end and a second end, and an accommodating space therein; wherein, the The housing has a hole at the first end; a clamp connected to the second end of the housing for fixing the pipe; a pipe expansion piece arranged in the accommodating space of the housing and has a main shaft and A tube expanding terminal; wherein the tube expanding terminal is arranged at one end of the main shaft and is adjacent to the clamp; one end of the main shaft is adjacent to the hole of the housing, and the power source is connected through the hole to be driven by the power source. Rotation; a feeding member, which is arranged in the housing space of the housing, can reciprocate within a predetermined distance; and a connector, which connects the expansion member and the feeding member in a separable manner; when the connection When the connector is connected to the pipe expanding piece and the feeding piece, the pipe expanding piece is driven by the feeding piece to move in the accommodating space, so that the pipe expanding terminal moves toward or away from the clamp; when the connector is not When connecting the pipe expanding piece and the feeding piece, the feeding piece is separated from the pipe expanding piece, and the pipe expanding piece rotates but does not move. The pipe expanding device according to claim 1, wherein the connector has a column and an elastic body; the column is movably arranged on the pipe expanding member; the feeding member has a connecting hole corresponding to the column Body; the elastic body elastically pushes against the column, so that the column extends into the connecting hole under normal conditions. The pipe expanding device according to claim 2, wherein the column is provided with a guide groove; a pin, one end of which passes through the pipe expanding piece and extends into the guide groove. The tube expanding device according to claim 2, wherein the end of the cylinder facing the connecting hole has an inclined surface; the inclined surface faces a rotation direction that drives the tube expanding terminal to move the clamp. The pipe expanding device according to claim 1, wherein the feeding member is provided with an external thread, and the inner side of the housing is provided with an internal thread; the external thread is engaged with the internal thread, so that the feeding member is connected through the connector When reaching the pipe expanding piece, the feeding piece will be driven by the pipe expanding piece to rotate and move in the accommodating space. The pipe expanding device according to claim 5, wherein the external thread further has a threaded area and a flat area; the threaded area is provided adjacent to an end of the feeding member farther from the clamp, and the flat area is provided adjacent to the inlet Give the other end of the piece. The pipe expanding device according to claim 1, wherein the feeding member is provided with a spring to elastically press against the pipe expanding member. The pipe expanding device according to claim 7, wherein the feeding piece has a groove with a perforation at the bottom end; the main shaft of the pipe expanding piece passes through the groove and the perforation of the feeding piece; the main shaft of the pipe expanding piece It has a wall portion facing the groove; the spring is sleeved on the main shaft, and its two ends are respectively abutted against the bottom end of the groove and the wall portion of the main shaft. The pipe expanding device according to claim 7, wherein the main shaft of the pipe expanding member has a mounting portion, the feeding member has a connecting portion corresponding to the mounting portion, and the connector is located between the connecting portion and the mounting portion. Section; the spring elastically presses against the tube expansion piece, so that the mounting portion normally abuts against the connecting portion. The pipe expanding device according to claim 9, wherein the connector does not connect the pipe expanding piece and the feeding piece, and the mounting part is separated from the connecting part.

Images