TWI576179B - Expander structure - Google Patents

Description

Expander structure

The invention relates to the technical field of a pipe expanding hand tool, in particular to a pipe expanding device capable of repairing different pipe diameters and damaged components by means of replacing components.

According to many pipeline projects, expansion equipment such as construction engineering and hydropower piping engineering are required. In the conventional pipe expanding device, the working piece of the pipe expanding device is connected to a hydraulic device, and the working member is driven by the hydraulic device to further expand the pipe. Therefore, in addition to the complicated equipment, it is impossible to provide users with them.

In addition, in the practice of repairing and replacing the pipe fittings, the pipe of the damaged part is generally removed, and then the pipe expanding operation is carried out at the cut end of the pipe through the pipe expanding device, so that the new pipe is joined to the cut end of the old pipe; the conventional pipe expander is referred to China. Patent Application No. 95207250, "Expander Construction", which mainly comprises a body, the body is provided with a handle for operation, a sleeve portion is arranged on the top side, and a expansion tube is pivotally connected to the sleeve portion. a front end position, the expansion tube holder is sleeved with a set of expansion collet having a tube expansion cone, and an operation rod shaft is disposed at a rear end position of the sleeve portion, and forms a pressing cam portion and a retracting cam portion. a pipe expanding punch is sleeved on the sleeve portion, and a front end position is provided with a conical expansion pipe portion, and can be pushed forward by the pressing cam portion of the operating rod, and the expansion tube of the expansion tube seat is extended Clamping the action of expanding the tube To provide a pipe expander with more expansion capacity and convenient operation.

However, when the pipe expander of the previous case is used, it is usually necessary to heat the metal pipe to a moldable temperature, so that the pipe port can be easily opened, but the metal pipe is likely to cause surface blackening during heating and annealing. It is possible that the surface is contaminated by other substances. It is necessary to further remove and cover the stain through sand cloth or syrup treatment, and the tube opening is prone to tube embrittlement or uneven material after being opened to annealing. In this case, the deformation of the expansion pipe is missing.

In view of the above problems and deficiencies of the prior art, it is an object of the present invention that the structure of the structure is such that the related components can be replaced by different sizes of tubes and shapes.

According to the above object of the present invention, a pipe expander structure is provided, comprising a pinch mechanism and a shaping mechanism; wherein the pinch mechanism comprises a pipe expansion seat, a pair of fittings placed on the expansion pipe base, and a lower module And a locking bolt in the expansion tube seat and pressing the upper and lower modules. The shaping mechanism comprises a expansion pipe bolt and a first and second shaping cap sleeves which are sleeved on the expansion pipe bolt. Through the composition of the above-mentioned components, the replacement of the components formed by the pinch mechanism and the shaping mechanism can be used according to the pipe materials of different pipe diameters, and can realize the expansion of different profiles, and can be damaged through the replacement of the components. The demander of the component.

100‧‧‧Clamping mechanism

11‧‧‧Expanding tube

111‧‧‧Geometry slot

112‧‧‧feed trough

113‧‧‧ side screw hole

114‧‧‧Resting screw holes

115‧‧‧ gripping department

12‧‧‧Impressive bolts

13‧‧‧Handle

14‧‧‧First magnetic parts

15‧‧‧Second magnetic parts

16‧‧‧Upper module

161‧‧‧ Upper half conical tunnel

1611‧‧‧ Taper

162‧‧‧Upper semi-circular hole

163‧‧‧Tips

17‧‧‧Next module

171‧‧‧ Lower half cone tunnel

1711‧‧‧ Taper

172‧‧‧ lower semi-circular hole

173‧‧‧Tips

200‧‧‧Shaping mechanism

21‧‧‧Expanding bolts

211‧‧‧ first diameter contraction

212‧‧‧Second diameter reduction section

213‧‧‧Path expansion

214‧‧‧Abutment end face

215‧‧‧ socket

216‧‧‧Sleeve convex

23‧‧‧First shaped cap

231‧‧‧ mouth

232‧‧‧Molding Department

233‧‧‧Bump

24‧‧‧Second shaped cap

241‧‧‧ mouth

242‧‧‧Molding Department

243‧‧‧Bump

40‧‧‧ pipes

50‧‧‧Vise

Fig. 1 is a perspective view showing the pinching mechanism of the expander of the present invention.

Fig. 2 is an exploded perspective view of the embodiment shown in Fig. 1.

Fig. 3 is a schematic exploded view of a portion of the embodiment shown in Fig. 2.

Fig. 4 is a schematic exploded view of the shaping mechanism of the expander of the present invention.

Fig. 5 is a schematic view (1) of the operation of the expander of the present invention.

Figure 6 is a schematic cross-sectional view of the expander of the present invention (1).

Figure 7 is a schematic diagram of the operation of the expander of the present invention (2).

Figure 8 is a schematic cross-sectional view of the expander of the present invention (2).

Figure 9 is a schematic view of the operation of the expander of the present invention (3).

Figure 10 is a schematic cross-sectional view of the expander of the present invention (3).

Figure 11 is a schematic view of a second embodiment of the present invention.

In the following, the embodiment of the expander of the present invention will be further described with reference to the accompanying drawings. For the sake of understanding the embodiments of the present invention, the same components are denoted by the same reference numerals.

Referring to FIGS. 1 to 6, the expander structure includes a pinch mechanism 100 and a shaping mechanism 200. The pinch mechanism 100 includes a tube expander 11, a tension bolt 12, and a grip. The handle 13, a first and second magnetic members 14, 15 and an upper and lower modules 16, 17. The shaping mechanism 200 includes a expansion bolt 21, a third magnetic element 22, and at least one first and second shaping caps 23, 24. Through the composition of the above-mentioned members, through the pinch mechanism 100 and the shaping mechanism 200, the pipes of different pipe diameters can be used, and different contours can be achieved. The shape of the pipe is expanded, and through the replacement of the components, the convenience of repairing the damaged member can be achieved.

The expansion base 11 has a geometric groove 111, a feed groove 112, a side screw hole 113, a pressing screw hole 114, and a clamping portion 115. The geometric groove 111 is formed on the front end surface of the expansion tube seat 11 and is open toward the front. The feeding groove 112 and the side screw hole 113 communicate with the geometric groove 111 and the outside of the expansion pipe seat 11, and are respectively formed on opposite sides of the expansion pipe base 11. The pressing screw hole 114 communicates with the geometric groove 111 and the outside of the expansion pipe base 11 and is formed at the top end of the expansion pipe base 11 to provide the above-mentioned tightening bolt 12 to be threaded and extended to the geometric groove 111. The clamping portion 115 is formed on the rear end surface of the expansion tube base 11. The clamping portion 115 can be selectively omitted when implemented.

The handle 13 is an axially extending tube (column) and is screwed at one end to the clamping portion 115 (the expansion tube 11) for providing a user's grip. The handle 13 can be selectively omitted when implemented.

The first magnetic member 14 is embedded in the front end surface of the pressing bolt 12, and can be selectively omitted when it is implemented.

The second magnetic member 15 is embedded in the bottom end surface of the plurality of slots 111 and can be selectively omitted during implementation.

The upper and lower modules 16 and 17 are vertically and vertically symmetrical and overlapped and received by the geometric groove 111, and can be magnetically positioned with the first and second magnetic elements 14 and 15. The upper and lower modules 16, 17 respectively have at least one upper and lower semi-conical holes 161, 171, at least one upper and lower semi-circular holes 162, 172, and One less prompt is marked 163, 173. Each of the upper and lower semi-conical holes 161 and 171 is formed to match the end faces of the upper and lower modules 16 and 17, and at least one of the upper and lower semi-conical holes 161 and 171 is formed with a taper 1611 and 1711. Each of the upper and lower semi-circular holes 162, 172 is formed on the outer end faces of the upper and lower modules 16, 17, corresponding to the upper ends of the upper and lower semi-conical holes 161, 171, and connects the upper and lower semi-conical holes 161, 171 and the outside. Each of the prompt indications 163, 173 is formed on the outer end faces of the upper and lower modules 16, 17 and adjacent to the upper and lower semi-conical holes 161, 171 (upper and lower semi-circular holes 162, 172) for indicating the adjacent The lower half of the tapered channel 161, 171 is suitable for the pipe diameter or specification (US or European). In implementation, each of the upper and lower semi-conical bores 161, 171 are combined to have different bore diameters, and the tubing 40 of different diameters is provided for penetration.

The expansion pipe bolt 21 (shown in FIG. 4) has integrally formed first and second diameter reduction sections 211, 212, a diameter expansion section 213, an abutment end surface 214, a set of joint grooves 215 and a set of joints. Convex 216.

The first and second diameter reducing sections 211 and 212 are respectively formed at opposite ends of the expansion bolt 21, and the outer surfaces thereof have external threads matched with the side screw holes 113. And the first and second diameter reducing sections 211, 212 respectively have a predetermined axial length.

The diameter expansion section 213 is formed by connecting the respective diameter reduction sections 211 and 212 to the expansion pipe bolt 21, and the outer surface thereof has a polygonal shape.

The abutting end surface 214 is formed on the axial end surface of the first diameter reducing section 211, and is matched with the predetermined axial length of the first diameter reducing section 211 for abutting the adjusting pipe 40 (described later in detail).

The sleeve groove 215 is recessed on the axial end surface of the second diameter reducing section 212 to provide the third magnetic element 22 for receiving.

The sleeve protrusion 216 is annularly disposed along the sleeve groove 215 and protrudes from the axial end surface of the second diameter reducing section 212.

The first (two) shaping cap 23 (24) has a set of ports 231 (241), a molding portion 232 (242), and a stud 233 (243). The sleeve 231 (241) and the molding portion 232 (242) are respectively formed at two ends of the first (two) shaping cap 23 (24); the sleeve 231 (241) is matched with the contour of the sleeve projection 216 The molding portion 232 of the first shaping cap 23 has an oblique concave surface, and the molding portion 242 of the second molding cap 24 has a convex surface.

The stud 233 (243) is erected at the center of the molding portion 232 (242). In the implementation, the first and second shaping caps 23, 24 pass through the sleeve 231 (241), and are sleeved on the sleeve protrusions 216 of the second diameter reducing section 212, and are magnetically restricted by the third magnetic element 22.

Therefore, the above is a description of the components and assembly manners of the pipe expansion device according to a preferred embodiment of the present invention. The actuation features of the embodiments of the present invention are further described below.

Please refer to Figures 1 to 6. According to the pipe 40 of different pipe diameters, the user can first find the upper and lower modules 16, 17 corresponding to the pipe diameter of 40 and the required specifications (US or European regulations). The upper and lower semi-conical holes 161, 171 are used to clamp the outer circumference of the pipe 40, and the pipe 40 is inserted into the geometric groove 111 of the expansion pipe base 11 to allow the upper and lower cones of the pipe 40 to be clamped. Tunnel The two ends of the 161 and 171 are respectively located on the same axis as the feeding groove 112 and the side screw hole 113 (and the tapered surface 1611 is adjacent to the side screw hole 113). The tube 40 is further adjusted such that one end of the tube 40 projects into the side screw hole 113.

The tightening bolts 12 are then tightened to a predetermined extent (as shown in Figures 5 and 6) to force the upper and lower modules 16, 17 to hold the tubing 40 so that the tubing 40 can still be pushed by external forces. Slide along the upper and lower modules 16, 17 and the lower half of the tapered channels 161, 171. Further, the expansion bolt 21 of the shaping mechanism 200 is screwed to the side screw hole 113 of the expansion tube seat 11 so that the first diameter reducing section 211 of the expansion bolt 21 abuts the end surface 214. The pipe 40 protruding from the side screw hole 113 is retracted until the diameter expansion section 213 of the pipe expansion bolt 21 abuts against the pipe expansion base 11. Thereby, the length of the pipe 40 accommodated in the side screw hole 113 is adjusted by the predetermined length of the first diameter reducing section 211.

At this time, the tightening bolt 12 is further tightened (as shown in Figs. 7 to 8) until the upper and lower die holders 16, 17 and the clamped pipe 4 are completely unable to be moved by the external force. In addition, the expansion bolt 21 is retracted, and the second expansion bolt 212 of the expansion bolt 21 is screwed into the side screw hole 113.

<first shaping>

The first shaping cap 23 is obtained (the contour of the molding portion 232 is an oblique concave surface), and is sleeved on the top end of the second diameter reducing section 212, and the second diameter reducing section 212 and the side screw hole 113 of the expansion bolt 21 are screwed. Hehe. During the screwing process, the protrusion 233 of the first shaping cap 23 is inserted into the inner diameter surface of the tube 40, since the tube 40 only has the molding portion 232 (oblique surface) of the first shaping cap 23, with the upper and lower sides. Modules 16, 17 above and below The semi-conical bores 161, 171 (tapered faces 1611, 1711) have a radially expandable space.

Therefore, under the continuous screwing advancement of the expansion pipe bolt 21, the first shaping cap 23 urges the end surface of the pipe 40, so that the pipe 40 of the end is deformed radially outward along the expansion space, and is tapered by the upper and lower half. The 181, 171 (tapered surface 1611, 171) and the molding portion 232 (oblique and concave surface) of the first shaping cap 23 are shaped by an axial section, and the deformation of the end tube is symmetrically up and down. "Shape.

<Second shaping>

Referring to Figures 9 and 10, the expansion bolt 21 is again withdrawn from the side screw hole 113 of the expansion tube seat 11, and the first shaping cap 23 is replaced, and the second shaping cap 24 is modified. The contour of the 242 is a convex convex surface, and is sleeved on the top end of the second diameter reducing section 212, and then the second diameter reducing section 212 of the expansion bolt 21 is screwed with the side screw hole 113. During the screwing process, the protrusion 243 of the second shaping cap 24 is inserted into the inner diameter surface of the pipe 4, and cooperates with the molding portion 242 (oblique surface) of the second shaping cap 24 to urge the end edge of the pipe 40 (deformed end) Further, the inner diameter surface of the pipe 40 is bent, and the end profile of the pipe 40 is formed into a bell mouth to meet the needs of the pipe expansion.

Referring to FIG. 11 , in the second embodiment of the present invention, the expansion tube base 11 can be further inserted through the clamping portion 115 and clamped with the vise 50, so that the user can expand the tube 40 according to the above embodiment. operation.

The above description is only for the preferred embodiment of the present invention, and is intended to clarify the features of the present invention, and is not intended to limit the scope of the embodiments of the present invention. Modifications, as well as variations well known to those skilled in the art, are still within the scope of the invention.

100‧‧‧Clamping mechanism

11‧‧‧Expanding tube

112‧‧‧feed trough

115‧‧‧ gripping department

12‧‧‧Impressive bolts

13‧‧‧Handle

16‧‧‧Upper module

163‧‧‧Tips

17‧‧‧Next module

173‧‧‧Tips

Claims (9)

The pipe expander structure comprises a pinch mechanism and a shaping mechanism screwed to the pinch mechanism, wherein: the pinch mechanism comprises a pipe expansion seat, a pressing bolt, an upper module, and a lower module; The expansion tube has a geometric groove formed integrally, a feed slot, a screw hole, and a pressing screw hole; the geometric groove is formed on the front end surface of the expansion tube and is open toward the front; The feed slot communicates with the side screw hole and the geometric groove and the outside of the expansion tube are respectively formed on opposite sides of the expansion tube seat; the pressing screw hole communicates with the geometric groove and the outside of the expansion tube seat, Forming on the top end of the expansion tube; the tightening bolt is screwed to extend the pressing screw hole to the geometric groove; the upper and lower modules are mately disposed in the geometric groove, respectively having at least one upper a lower semi-conical hole, the upper and lower semi-cone holes are matched to each other to form an end face of the upper and lower semi-conical holes, and the upper and lower semi-cone holes are formed with a taper at least one end; the shaping mechanism comprises a a pipe expansion bolt and a wheel sleeve are sleeved on the pipe expansion bolt Shaping a first sleeve and a second cap shaped caps; the pipe expanding bolt having integrally molded a first one of the reduced diameter section, a first a second diameter constriction section, a diameter expansion section, an abutting end surface, and a set of convex portions; the first and second diameter constricted sections are respectively formed at opposite ends of the expansion pipe bolt, and the outer surfaces thereof have The side screw hole is matched with the external thread; the diameter expansion section is respectively connected to the first and second diameter reducing sections formed on the expansion pipe bolt; the abutting end surface is formed on the axial end face of the first diameter reduction section The sleeve protrusion is formed on an axial end surface of the second diameter reducing section; the first shaping cap has a set of mouth and a plastic formed on opposite ends of the first shaping cap a profile portion and a stud forming a center of the molding portion, wherein the molding portion has an oblique concave surface. The second shaping cap has a set of mouths and a molding portion formed at opposite ends of the second shaping cap, and a protrusion forming a center of the molding portion, wherein the molding portion is It is a convex surface. The pipe expanding device of claim 1, wherein the geometric groove has a contour selected from a circular arc or a polygonal shape. The pipe expansion device of claim 2, wherein the upper and lower modules further comprise a plurality of opposite ends of the upper and lower semi-conical holes, formed on the outer end faces of the upper and lower modules, and the lower semi-circular holes. The pipe expansion device according to claim 3, wherein the pipe expansion device is further The step has a clamping portion formed on the rear end surface of the expansion tube seat. The pipe expanding device of claim 4, wherein the pipe expanding base is further provided with a grip. The pipe expanding device of claim 5, wherein the end face of the sleeve projection is further recessed with a set of slots and a third magnetic component is received. The pipe expansion device of claim 6, wherein the front end face of the pressing bolt is further embedded with a first magnetic member. The pipe expanding device of claim 7, wherein the bottom end surface of the plurality of slots is further embedded with a second magnetic member. The expansion device according to any one of the preceding claims, wherein the outer end surface of the upper and lower modules further has at least one prompt mark adjacent to the upper and lower semi-cone holes for Indicate the diameter or size of the upper and lower half of the tapered channel.