TWI583457B - Copper tube expander - Google Patents

Description

Copper tube fixture for refrigerant

The invention relates to a fixture, in particular to a copper tube fixture for a refrigerant for expanding a copper tube for a refrigerant.

In general, when a refrigerant piping project or the like is performed, a pipe expansion tool is generally used, and a copper pipe for a refrigerant is expanded to form a bell mouth, thereby performing a subsequent piping operation.

However, with the existing expansion tube, the bell mouth formed by expanding the copper tube for the refrigerant is likely to have burrs or scratches and the surface is rough and uneven, so that the bell mouth after the piping is prone to cracks and does not support. The high pressure of the refrigerant causes the leakage of refrigerant.

In view of this, the present inventors have been engaged in the development and design of related products for many years, and have been able to improve the above-mentioned defects. With great interest in research and cooperation with the use of academics, the present invention finally proposes a present invention which is reasonable in design and effective in improving the above-mentioned defects.

The main object of the present invention is to provide a copper pipe fixture for a refrigerant, which can make the bell mouth of the copper tube for the refrigerant after the pipe expansion has no rough surface, no burrs or scratches, and smoothness with high flatness. surface.

In order to achieve the above, the present invention provides a copper tube fixture for a refrigerant for expanding a tube, comprising: a body having a guide groove in a lower half thereof, the guide groove being laterally accessible to a pinch tube assembly And a drive shaft assembly screwed in from the upper half of the body, and a drive tube assembly extending into the guide groove and disposed eccentrically under the drive shaft assembly, the drive shaft assembly is configured to drive the expansion head Rotation; wherein the tube head There is a substrate and a diamond layer formed on the surface of the substrate, and the expansion tube is rotatably moved toward the tube assembly to perform a tube expansion operation.

The present invention has at least the following advantages: the present invention is provided with a boring head disposed below the drive shaft assembly and extending into the guide groove, and the expansion head has a base material and a diamond layer formed on the surface of the base material, so that the expansion The tube head has the characteristics of high hardness, high smoothness, high wear resistance, non-contamination, etc., so that the expansion tube does not contaminate the dust when the tube for expanding the copper tube is expanded, and the copper tube for the refrigerant is used. The contact surface (the bell mouth) formed after the pipe expansion does not have a rough surface, and there is no burr or scratch, but a smooth surface with a high flatness to improve the contact formed by the copper tube expansion of the conventional refrigerant. The surface is rough and prone to burrs or scratches.

10‧‧‧ Ontology

11‧‧‧ Guide slot

20‧‧‧Pinch assembly

21‧‧‧Pliers

22‧‧‧Brake tube for refrigerant

221‧‧‧Contact surface

30‧‧‧Drive shaft assembly

31‧‧‧ Drives

311‧‧‧Latch

312‧‧‧ Groove

32‧‧‧Connecting parts

321‧‧‧ jack

33‧‧‧ shaft parts

End of 331‧‧‧

332‧‧‧ head end

40‧‧‧Expanding head

41‧‧‧Substrate

42‧‧‧Diamond layer

421‧‧‧ bottom layer

422‧‧‧ middle layer

423‧‧‧Face

50‧‧‧ Positioning components

51‧‧‧ positioning screw

52‧‧‧ toggle lever

60‧‧‧Operating tools

Fig. 1 is a schematic view showing the state of the copper tube fixture for a refrigerant before use.

2 is a partial cross-sectional view showing a copper tube fixture for a refrigerant according to the present invention.

Fig. 3 is a partially enlarged schematic view showing an embodiment of a copper tube fixture for a refrigerant according to the present invention.

Fig. 4 is a partially enlarged schematic view showing another embodiment of the copper tube jig for a refrigerant according to the present invention.

Fig. 5 is a view showing the state of the copper tube jig for a refrigerant according to the present invention.

Fig. 6 is a schematic view showing the state of the copper tube jig for a refrigerant according to the present invention.

The following is a description of an embodiment of the present invention relating to a "copper tube fixture for a refrigerant", and the advantages and effects of the present invention can be understood by those skilled in the art from the disclosure of the present specification. The present invention may be carried out or applied in various other specific embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention. In addition, the drawings of the present invention are merely illustrative and are not to be construed in terms of actual dimensions. Therefore, all of the embodiments of the present invention are exemplified and are not intended to be limiting, and the present invention may be widely applied to other embodiments, and The invention is not limited to any embodiment, but should be based on the scope of the patent application and its equivalents.

Please refer to FIG. 1 to FIG. 6, which are a preferred embodiment of the present invention. As shown in FIG. 1 and FIG. 2, a copper tube fixture for a refrigerant for expanding a pipe mainly includes a body 10, a pinch tube assembly 20, a drive shaft assembly 30, and a pipe expansion head 40. .

The lower half of the body 10 has a guide channel 11 for the lateral placement of the pinch tube assembly 20. The drive shaft assembly 30 is screwed into the upper half of the body 10. The drive shaft assembly 30 is provided with a boring head 40 that can extend into the guide groove 11 and is eccentrically disposed. The expander head 40 has a base 41 and a base. The diamond layer 42 on the surface of the material 41 (Fig. 3), and the expansion tube head 40 is rotatably moved toward the pinch tube assembly 20 for the action of expanding the tube. The respective configurations of the pinch tube assembly 20, the drive shaft assembly 30, and the expansion tube head 40 will be described in more detail below, and the mutual relationship between them will be described as appropriate.

The pinch tube assembly 20 includes a pinch clamp 21 and a refrigerant copper pipe 22, and the pinch clamp 21 is provided with a circular hole of a different diameter to clamp the refrigerant copper pipe 22.

The drive shaft assembly 30 is configured to drive the expansion head 40 to rotate. The drive shaft assembly 30 can include a drive member 31, a connecting member 32, and a shaft member 33. The driving member 31 is detachably connected to the connecting member 32. The connecting member 32 is screwed into the body 10, and the shaft member 33 is disposed through the connecting member 32. The end 331 of the shaft member 33 is fixed to the driving member 31. The head end 332 of the shaft member 33 is coupled to the expansion head 40. Thereby, when the driving member 31 rotates, the connecting member 32 and the shaft member 33 can be rotated at the same time, thereby driving the expanding head 40 to rotate to expand the copper tube 22 for the refrigerant of the pinch tube assembly 20. In more detail, the driving member 31 and the connecting member 32 are detachably connected through the latch 311 and the jack 321 , and when the tube expansion is completed, the latch 311 can be elastically pushed by the end of the shaft member 33 to leave the jack. The driving member 31 and the connecting member 32 are connected to the pin 311 to form a idling, so that the connecting member 32 stops moving, so that the pipe expanding head 40 is no longer facing the pinch tube group. The member 30 is pressed forward to ensure that the refrigerant copper tube 22 is not deformed by excessive pressure. It is within the skill of the art to freely design the drive shaft assembly 30 to drive the expander head 40 to rotate. This embodiment does not limit the type of drive shaft assembly 30.

In addition, a copper tube fixture for a refrigerant further includes a positioning assembly 50 for positioning the pinch assembly 20, and the positioning assembly 50 can include a positioning screw 51 and a triggering rod 52, and the positioning screw 51. The utility model can be screwed into the body 10 and protrude into the guiding groove 11 to press the clamping clamp 21 into the guiding groove 11 (as shown in FIG. 5 ). The pulling rod 52 is connected to one end of the positioning screw 51 for pulling and positioning. Screw 51. A person skilled in the art can freely design the positioning assembly 50 to position the pinch assembly 20 in the channel 11. This embodiment does not limit the type of the positioning assembly 50.

Furthermore, a copper tube fixture for a refrigerant further includes an operating tool 60 for driving the drive shaft assembly 30 to rotate. The operating tool 60 can be a manual tool, such as a rotating handle, or of course electric. Tools such as electric screwdrivers. In detail, one of the driving members 31 is recessed with a recess 312, and the recess 312 is inserted into the operating tool 60 to drive the drive shaft assembly 30 to rotate through the operating tools 60. One of ordinary skill in the art is free to select any operating tool 60 to manually or automatically rotate the drive shaft assembly 30. This embodiment does not limit the type of the operating tool 60.

The pipe expanding head 40 of this embodiment has a base material 41 and a diamond layer 42 formed on the surface of the base material 41 (see Fig. 3). In detail, the substrate 41 may be a steel or an alloy material such as steel or stainless steel, but not limited thereto, and the diamond layer 42 may be a diamond coating layer or a diamond-like carbon layer (Diamond-like Carbon). Or a type of diamond-like coating formed on the surface of the substrate 41 by plating. Therefore, the diamond layer 42 is plated through the expansion pipe head 40, so that the pipe expansion head 40 has characteristics of high hardness, high smoothness, high wear resistance, non-staining, and the like, so that the pipe expansion head 40 is in the copper tube 22 for the refrigerant. When the pipe expansion operation is carried out, it will not be contaminated with dust and will be cold. The contact surface 221 formed by the expansion of the copper tube 22 (such as the bell mouth of FIG. 6) does not have a rough surface, and there is no burr or scratch, but a smooth surface with a high flatness, which effectively improves the conventional knowledge. The contact surface formed by the expansion of the copper tube with a refrigerant is a rough surface and is prone to burrs or scratches.

The tube expansion head 40 of another embodiment has a substrate 41 and a diamond layer 42 formed on the surface of the substrate 41 (see FIG. 4). The diamond layer 42 may be a composite layer including a bottom layer 421 and an intermediate layer 422. A surface layer 423, and the bottom layer 421 may be a diamond particle layer, the surface layer 423 may be a diamond film layer, and the intermediate layer 422 is sandwiched between the bottom layer 421 and the surface layer 423, and the intermediate layer 422 may be a metal film layer, which may make the bottom layer There is good bonding between 421 and surface layer 423. The through-diamond layer 42 is a composite layer capable of having higher hardness and high wear resistance.

In operation, as shown in FIGS. 1, 5 and 6, the refrigerant copper tube 22 is clamped by the pincers 21, placed in the guide groove 11 of the body 10, and the refrigerant copper tube 22 is aligned with the expanded tube head. 40, then rotating the positioning assembly 50 to force the positioning of the pinch clamp 21 into the guide groove 11, and inserting the operating tool 60 into the groove 312 of the driving member 4, that is, rotating the operating tool 60 to drive the driving shaft assembly 30 to rotate, Thereby, the expansion head 40 performs the operation of expanding the copper tube 22 for refrigerant. After the pipe expansion is completed, the operating tool 60 can be reversely rotated to drive the drive shaft assembly 30 to rotate in the reverse direction, so that the pipe expansion head 40 is moved upwardly away from the refrigerant copper pipe 22, and then the positioning assembly 50 is released, and then the pipe can be clamped. The copper tube 22 for refrigerant after the expansion is taken out from the nipper 21 to perform subsequent piping work.

In summary, the copper tube fixture for refrigerant of the present invention is provided with a tube expansion head 40 which is eccentrically disposed to extend into the guide groove 11 under the drive shaft assembly 30, and the expansion tube head 40 has a base material 41 and is formed on The diamond layer 42 on the surface of the substrate 41 has the characteristics that the expanded tube head 40 has high hardness, high smoothness, high wear resistance, and no staining, so that the expansion tube 40 expands the copper tube 22 for the refrigerant. When the dust is not contaminated, the contact surface 221 formed by expanding the copper tube 22 of the refrigerant does not have a rough surface. There is no burr or scratch, but a smooth surface with a high degree of flatness. It is effective to improve the contact surface formed by the copper tube expansion of the conventional refrigerant as a rough surface and easy to have burrs or scratches.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent variations and modifications of the scope of the invention are intended to be within the scope of the invention.

10‧‧‧ Ontology

11‧‧‧ Guide slot

30‧‧‧Drive shaft assembly

31‧‧‧ Drives

311‧‧‧Latch

312‧‧‧ Groove

32‧‧‧Connecting parts

321‧‧‧ jack

33‧‧‧ shaft parts

End of 331‧‧‧

332‧‧‧ head end

40‧‧‧Expanding head

50‧‧‧ Positioning components

51‧‧‧ positioning screw

52‧‧‧ toggle lever

60‧‧‧Operating tools

Claims (9)

A copper tube fixture for a refrigerant for expanding a pipe, comprising: a body having a guide groove in a lower half thereof, the guide groove being laterally inserted into a pinch tube assembly; and a drive shaft assembly The upper part of the body is screwed in, and a shaft expansion head extending into the guide groove and disposed eccentrically is disposed under the drive shaft assembly, the drive shaft assembly is configured to drive the expansion head to rotate; wherein the expansion head has a base And a diamond layer formed on the surface of the substrate, the diamond layer being a composite layer comprising a bottom layer, an intermediate layer and a surface layer, the intermediate layer being sandwiched between the bottom layer and the surface layer, wherein the bottom layer is a layer of diamond particles, the intermediate layer being a metal film layer, the surface layer being a diamond film layer; and the pipe expansion head is rotatably moved toward the pinch tube assembly for pipe expansion. The copper tube fixture for a refrigerant according to claim 1, wherein the pinch tube assembly comprises a pinch tube clamp and a copper tube for a refrigerant, and the pinch clamp is used for clamping the copper tube for the refrigerant. The copper tube fixture for a refrigerant according to claim 1, wherein the drive shaft assembly comprises a driving member, a connecting member, and a shaft member, the driving member is detachably connected to the connecting member, and the connecting member is rotated. The shaft member is inserted through the connecting member, and the end of the shaft is fixed to the driving member, and the head end of the shaft is connected to the expanding head. The copper tube fixture for a refrigerant according to claim 1, further comprising a positioning component for positioning the pinch tube assembly in the guide groove. The copper pipe fixture for refrigerant according to claim 1, further comprising an operating tool inserted into the drive shaft assembly to drive the drive shaft assembly turn. The copper tube fixture for a refrigerant according to claim 1, wherein the substrate is made of a steel material or an alloy material. The copper tube fixture for a refrigerant according to claim 1, wherein the diamond layer is a diamond coating layer. The copper tube fixture for a refrigerant according to claim 1, wherein the diamond layer is a type of diamond carbon film layer. The copper tube fixture for a refrigerant according to claim 1, wherein the diamond layer is a diamond coating layer.