CN214442501U - U-shaped pipe bending part shrink-proof device for pipe expander and pipe expander - Google Patents

Abstract

The utility model relates to a U-shaped pipe flexion shrinker and electric tube expander for electric tube expander, wherein, the U-shaped pipe flexion shrinker includes: a shank including a first end for receiving the bend of the U-tube, a second end for connecting to a main body of the tube expander, and an extension connecting the first and second ends; the swinging hook is hinged in the handle body and comprises a hook section arranged in the first end part of the handle body; and the push-pull mechanism is arranged in the handle body and is used for being connected with the main body of the pipe expander, and the push-pull mechanism can drive the swinging hook to swing and enable the swinging hook to hook the bending part of the U-shaped pipe through the hook section. The utility model discloses a more problem of part quantity that the ware is prevented contracting by U-shaped pipe flexion can be solved to the ware is prevented contracting by U-shaped pipe flexion to simplify the process flow, reduction in production cost, and allow the ware is prevented contracting by U-shaped pipe flexion to reduce the volume and be suitable for in more constrictive space.

Description

U-shaped pipe bending part shrink-proof device for pipe expander and pipe expander

Technical Field

The utility model belongs to the technical field of the expand tube equipment, concretely relates to U-shaped pipe flexion shrinker and expand tube machine for expand tube machine.

Background

When the tube expander is used for expanding the tube of a heat exchanger (such as an air conditioning condenser), the U-shaped tube bending part shrink preventer is used for clamping the bending part of the U-shaped tube of the heat exchanger so as to limit the bending part of the U-shaped tube, and the bending part of the U-shaped tube is prevented from shrinking in the tube expanding process. The existing U-shaped pipe bending part shrink-proof device mainly comprises a handle body connected with a main body of a pipe expander, a clamping assembly arranged in the handle body and a push-pull mechanism connected with the clamping assembly. The clamping assembly comprises two clamping parts, and the push-pull assembly can drive the two clamping parts of the clamping assembly to be mutually combined or separated under the operation of the main body of the pipe expander so as to enable the two clamping parts to clamp or release the bent part of the U-shaped pipe.

However, the inventor of the present application has diligently made his efforts to perfect and found that, although the U-shaped pipe bending portion shrinkproof device can reliably limit the U-shaped pipe, the number of parts required is large, which results in a complicated process flow and a high production cost. Also, because the conventional U-shaped pipe bending portion shrinkproof device has a large volume, it cannot be used in a narrow space, and there is still much room for improvement.

SUMMERY OF THE UTILITY MODEL

In order to solve the above-mentioned whole or partial problem, the utility model aims to provide a U-shaped pipe flexion shrinkproof ware and electric tube expander for solve the more problem of part quantity of U-shaped pipe flexion shrinkproof ware, thereby simplify the manufacturing procedure, reduction in production cost, and allow the U-shaped pipe flexion shrinkproof ware to reduce the volume and be suitable for in more constrictive space.

According to the utility model discloses a first aspect provides a U-shaped pipe flexion shrinkproof ware for electric tube expander, include: a shank comprising a first end for receiving the bend of a U-tube, a second end for connecting the main body of the tube expander, and an extension connecting the first and second ends; the swinging hook is hinged in the handle body and comprises a hook section arranged in the first end part of the handle body; and the push-pull mechanism is arranged in the handle body, is used for being connected with the main body of the pipe expander and can drive the swinging hook to swing and enable the swinging hook to hook the bent part of the U-shaped pipe through the hook section.

Further, the first end of the handle body include with the first arc surface that the flexion of U-shaped pipe contacted, the swing couple include with the second arc surface that the flexion of U-shaped pipe contacted, first arc surface and second arc surface are in the hook section catches the concatenation each other during the flexion of U-shaped pipe, the sum of the radian of first arc surface and second arc surface when the concatenation is 1.5 pi-1.6 pi.

Further, the swing hook includes a hinge section connected with the hook section and hinged in the extension portion of the handle body, and a manipulation section connected with the hinge section and closer to the second end of the handle body than the hinge section.

Furthermore, a guide rail hole is formed in the control section, and the push-pull mechanism comprises a transmission rod which is arranged in the extension part of the handle body and is provided with a connecting pin hole, a connecting pin which can penetrate through the connecting pin hole and the guide rail hole and is used for connecting the swing hook with the transmission rod, and a push-pull rod which is inserted into the handle body from the second end part of the handle body and is connected with the transmission rod; when the push-pull rod is pulled to gradually withdraw from the handle body, the push-pull rod can drive the transmission rod to move towards the direction far away from the first end part of the handle body, and the transmission rod drives the connecting pin to slide in the guide rail hole, so that the swinging hook swings and the hook section of the swinging hook is forced to hook the bent part of the U-shaped pipe; when the push-pull rod is pushed to gradually enter the handle body, the push-pull rod drives the transmission rod to move towards the first end of the handle body so as to drive the connecting pin to slide in the guide rail hole through the transmission rod, so that the swinging hook swings and the hook section of the swinging hook is forced to be separated from the bent part of the U-shaped pipe.

Furthermore, the push-pull mechanism further comprises a return spring which is sleeved on the push-pull rod and is partially inserted into the second end part of the handle body, and an anti-falling flange which is arranged on the push-pull rod and is abutted against the return spring.

Furthermore, the transmission rod is in threaded connection with the push-pull rod.

Furthermore, an escape window is arranged on the handle body, and the escape window permits the hooking section of the swing hook to move in the escape window.

Furthermore, a first assembling window and a second assembling window which are symmetrically arranged are arranged on the extending portion of the handle body, the U-shaped pipe bending portion shrink-proof device further comprises a first sealing cover which is detachably connected with the handle body and used for sealing the first assembling window, and a second sealing cover which is detachably connected with the handle body and used for sealing the second assembling window, and the hinged section of the swing hook and the transmission rod are located between the first assembling window and the second assembling window.

Furthermore, the U-shaped pipe bending part shrink preventer further comprises a plurality of clamping pins fixedly arranged at the second end part of the handle body, and the plurality of clamping pins can be clamped in the main body of the pipe expander and can be used for installing the handle body on the main body of the pipe expander.

According to the utility model discloses a second aspect provides a pipe expander, include according to the utility model discloses the first aspect U-shaped pipe flexion shrinkproof ware.

According to the above technical scheme, the utility model discloses a U-shaped pipe flexion shrinkproof ware for electric tube expander will be revised as a swing couple by the centre gripping subassembly of two hold-in components, and when the swing took place for push-and-pull institution drive swing couple, this swing couple can be through the flexion that its hook section caught on the U-shaped pipe. The utility model discloses a U-shaped pipe flexion shrinkproof ware only needs just can implement firm reliable spacing to the U-shaped pipe with the help of a swing couple, and no longer need implement firm reliable spacing to the U-shaped pipe with the help of two clamping parts like prior art, compares in prior art, the utility model discloses a U-shaped pipe flexion shrinkproof ware for electric tube expander has reduced the quantity of part, has guaranteed that its process flow is simpler, and manufacturing cost is lower to it becomes in order to be suitable for in more constrictive space to allow its volume to become littleer.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:

fig. 1 is a schematic structural view of a U-shaped pipe bending portion shrinkproof device for a pipe expander according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the U-shaped pipe bend shrinkproof apparatus shown in FIG. 1;

FIG. 3 is a schematic structural view of a swing hook of the U-shaped tube bending portion shrinkproof device according to the embodiment of the present invention;

fig. 4 is a partial cross-sectional view of a U-shaped tube bending portion shrinkproof device according to an embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a U-shaped pipe bending portion shrink-proof device for a pipe expander according to an embodiment of the present invention. Fig. 2 is a sectional view of the U-shaped pipe bending portion shrinkproof device shown in fig. 1. As shown in fig. 1 and 2, a U-shaped pipe bending portion shrinkproof device 100 for a pipe expander according to an embodiment of the present invention mainly includes a handle body 1, a swing hook 2, and a push-pull mechanism 3. Wherein the shank body 1 comprises a first end 11 for receiving the bend of a U-shaped tube, a second end 12 for connecting the main body of the tube expander, and an extension 13 connecting the first end 11 and the second end 12. The oscillating hook 2 is articulated in the handle body 1 and comprises a hooking section 21 arranged in the first end 11 of the handle body 1. The push-pull mechanism 3 is arranged in the handle body 1 and is used for being connected with the main body of the pipe expander, and can drive the swing hook 2 to swing and enable the swing hook 2 to hook the bending part of the U-shaped pipe through the hook section 21.

The utility model discloses a U-shaped pipe flexion shrinkproof ware 100 for electric tube expander will be revised as a swing couple 2 by the centre gripping subassembly of two hold-in components, when 3 drive swing couples 2 of push-and-pull institution take place the swing, this swing couple 2 can be through the flexion that its hook section 21 caught on the U-shaped pipe, this makes the utility model discloses U-shaped pipe flexion shrinkproof ware 100 only need just can implement firm reliable spacing to the U-shaped pipe with the help of a swing couple 2. Compared with the prior art, the utility model discloses a U-shaped pipe flexion shrinkproof ware 100 for electric tube expander has reduced the quantity of part, has guaranteed that its process flow is simpler, and manufacturing cost is lower to allow its volume to become littleer in order being suitable for in narrower space.

In the present embodiment, as shown in fig. 3, the first end portion 11 of the shank 1 includes a first circular arc surface 11a that contacts the bent portion of the U-shaped pipe. The swing hook 2 includes a second arc surface 21a contacting the bent portion of the U-shaped pipe. The first arc surface 11a and the second arc surface 21a are spliced with each other when the hooking section 21 hooks the bent portion of the U-shaped pipe. The sum of the radians of the first arc surface 11a and the second arc surface 21a at the time of splicing is any value of 1.5 pi to 1.6 pi, as shown in fig. 4. After a large number of practices, it is proved that when the sum of the radians of the first arc surface 11a and the second arc surface 21a is any value between 1.5 pi and 1.6 pi during splicing, the U-shaped pipe bending portion shrink prevention device 100 can allow a U-shaped pipe to be smoothly placed between the first arc surface 11a and the second arc surface 21a, and can firmly and reliably limit the U-shaped pipe.

In the present embodiment, the oscillating clevis 2 comprises a hinging section 22 connected to the hooking section 21 and hinged inside the extension 13 of the shank 1, and a handling section 23 connected to the hinging section 22 and closer to the second end 12 of the shank 1 than the hinging section 22. The control section 23 is connected with the push-pull mechanism 3, can swing under the driving of the push-pull mechanism 3, and drives the hooking section 21 to swing around a hinged position by means of the hinged section 22, so that the swinging hook 2 is allowed to hook the bent part of the U-shaped pipe through the hooking section 21.

In the present embodiment, a guide hole 23a is provided in the manipulation section 23. The push-pull mechanism 3 includes a transmission rod 31 provided in the extension 13 of the handle body 1 and having a coupling pin hole, a coupling pin 32 capable of passing through the coupling pin hole and the guide rail hole 23a and coupling the swing hook 2 to the transmission rod 31, and a push-pull rod 33 inserted into the handle body 1 from the second end 12 of the handle body 1 to be coupled to the transmission rod 31. When the push-pull rod 33 is pulled to gradually withdraw from the handle body 1, the push-pull rod 33 can drive the transmission rod 31 to move away from the first end 11 of the handle body 1, and the transmission rod 31 drives the connecting pin 32 to slide in the guide rail hole 23a, so that the swing hook 2 swings and the hook section 21 of the swing hook is forced to hook the bent part of the U-shaped pipe. When the push-pull rod 33 is pushed gradually into the handle body 1, the push-pull rod 33 carries the transmission rod 31 towards the first end 11 of the handle body 1 to drive the connecting pin 32, via the transmission rod 31, to slide in the guide hole 23a, so as to cause the oscillating hook 2 to oscillate and force its hooking section 21 out of the bend of the U-shaped tube.

In this embodiment, the push-pull mechanism 3 further includes a return spring 34 that is fitted over the push-pull rod 33 and is partially inserted into the second end portion 12 of the handle body 1, and a retaining flange 33a that is provided on the push-pull rod 33 and abuts against the return spring 34. When the push-pull rod 33 is pushed, the return spring 34 can be compressed and allow the push-pull rod 33 to gradually enter the handle body 1 to move the transmission rod 31 toward the first end 11 of the handle body 1 and to drive the connecting pin 32 to slide in the guide rail hole 23a through the transmission rod 31 to swing the swing hook 2 and to force the hooking section 21 thereof to be disengaged from the bent portion of the U-shaped pipe. When the external force disappears, the return spring 34 can drive the push-pull rod 33 to gradually move out of the handle body 1 by its own elastic restoring force, so that the transmission rod 31 moves towards the direction away from the first end 11 of the handle body 1, and drives the connecting pin 32 to slide in the guide rail hole 23a through the transmission rod 31, so that the swing hook 2 swings and forces the hook section 21 thereof to hook the bent portion of the U-shaped pipe. The transmission rod 31 and the push-pull rod 33 may be of a split structure or an integrated structure. When the driving rod 31 and the push-pull rod 33 are chosen to be of a split structure, the connection between the two can be chosen to be one of riveted, clamped or bolted, but is preferably a strong and reliable threaded connection.

In the present embodiment, a bypass window 14 is provided on the handle body 1, and the bypass window 14 permits the hooking section 21 of the swing hook 2 to move therein, so that the hooking section 21 passes through the bypass window 14 and out of the handle body 1 when the swing hook 2 swings, so that a U-shaped pipe can be smoothly inserted between the first arc surface 11a and the second arc surface 21 a. This allows the range of motion of the swing hook 2 to be limited to the handle body 1, further allowing the handle body 1 to be made smaller in volume, thereby saving the space occupied by the U-shaped tube bend shrinkproof apparatus 100 and ensuring that the U-shaped tube bend shrinkproof apparatus 100 is more suitable for use in a narrower environment.

In this embodiment, the first fitting window and the second fitting window are symmetrically arranged on the extension portion 13 of the handle body 1, and the U-shaped pipe bending portion shrinkproof apparatus 100 further includes a first cover 12a detachably coupled to the handle body 1 for closing the first fitting window, and a second cover 12b detachably coupled to the handle body 1 for closing the second fitting window. The hinge section 22 of the swivel hook 2 and the transmission rod 31 are located between the first and the second fitting window. Wherein the first and second fitting windows can allow the connecting pin 32 to pass through and be fitted into the shank body 1 so as to pass through the connecting pin hole and the guide rail hole 23a, and can also allow the hinge shaft to pass through and pass into the hinge segment 22 of the swing hook 2 so as to hinge the hinge segment 22 with the shank body 1. The first cover 12a and the second cover 12b can be shielded at the first fitting window and the second fitting window and prevent the connecting pin 32 and the hinge shaft from being separated from the first fitting window and the second fitting window. The connection between each pair of the cover and the assembly window can be selected to be one of riveting, clamping or bolt connection. However, in the present embodiment, the first cover 12a and the second cover 12b are fixed to the first fitting window and the second fitting window by the first bolt and the second bolt that connect the first cover 12a and the second cover 12b and are screwed into the handle body 1.

In this embodiment, the hairpin bend shrinkproof apparatus 100 further comprises a bayonet 4 fixedly provided on the second end 12 of the shank body 1, the plurality of bayonet 4 being capable of being snapped into the main body of the pipe expander and mounting the shank body 1 thereon. The number of the clamping pins 4 can be one or more, and the more the clamping pins 4 are, the firmer the connection between the handle body 1 and the main body of the pipe expander is. In order to be able to securely and reliably mount the shank body 1 between the shank body 1 and the main body of the pipe expander without excessively increasing the cost of the U-tube bend shrinkproof 100, the number of the bayonet 4 is preferably two.

In an embodiment not shown, it concerns a body of a pipe expander comprising the above-described U-tube bend shrinkproof apparatus 100. The tube expander can inherit the effect of the U-shaped tube bending part shrink prevention device 100, namely, the using amount of parts of the U-shaped tube bending part shrink prevention device 100 is reduced, the processing flow is simpler, the production cost is lower, and therefore the volume of the tube expander is allowed to become smaller so as to be suitable for a narrower space.

In the description of the present application, it is to be understood that the terms "inside", "outside", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention, and such changes or variations should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A tube expander for use with a U-tube bend shrinkproof apparatus, comprising:

a shank comprising a first end for receiving the bend of a U-tube, a second end for connecting the main body of the tube expander, and an extension connecting the first and second ends;

the swinging hook is hinged in the handle body and comprises a hook section arranged in the first end part of the handle body;

and the push-pull mechanism is arranged in the handle body, is used for being connected with the main body of the pipe expander and can drive the swinging hook to swing and enable the swinging hook to hook the bent part of the U-shaped pipe through the hook section.

2. The U-shaped tube bend shrinkproof apparatus of claim 1, wherein the first end of the handle comprises a first arc surface in contact with the bend of the U-shaped tube, the swing hook comprises a second arc surface in contact with the bend of the U-shaped tube, the first arc surface and the second arc surface are spliced to each other when the hook section hooks the bend of the U-shaped tube, and the sum of the arcs of the first arc surface and the second arc surface when spliced is 1.5 pi to 1.6 pi.

3. The U-tube bend shrinkproof apparatus of claim 1 or 2, wherein the swing hook comprises a hinge section connected to the hook section and hinged within the extension of the handle body, and a manipulation section connected to the hinge section and closer to the second end of the handle body than the hinge section.

4. A hairpin tube bend shrinkproof apparatus of claim 3 wherein a guide rail hole is provided on the manipulation section, the push-pull mechanism includes a transmission rod provided in the extension of the shank body and having a connection pin hole, a connection pin capable of passing through the connection pin hole and the guide rail hole and connecting the swing hook and the transmission rod, and a push-pull rod inserted into the shank body from the second end portion of the shank body and connected to the transmission rod; when the push-pull rod is pulled to gradually withdraw from the handle body, the push-pull rod can drive the transmission rod to move towards the direction far away from the first end part of the handle body, and the transmission rod drives the connecting pin to slide in the guide rail hole, so that the swinging hook swings and the hook section of the swinging hook is forced to hook the bent part of the U-shaped pipe; when the push-pull rod is pushed to gradually enter the handle body, the push-pull rod drives the transmission rod to move towards the first end of the handle body so as to drive the connecting pin to slide in the guide rail hole through the transmission rod, so that the swinging hook swings and the hook section of the swinging hook is forced to be separated from the bent part of the U-shaped pipe.

5. The hairpin tube bend shrinkproof apparatus of claim 4 wherein the push-pull mechanism further comprises a return spring disposed over the push-pull rod and partially inserted into the second end of the handle body, and an anti-slip flange disposed over the push-pull rod and abutting the return spring.

6. The hairpin bend shrinkproof apparatus of claim 4 wherein the connection between the drive rod and the push-pull rod is a threaded connection.

7. The hairpin bend shrinkproof apparatus of claim 3 wherein an escape window is provided on the handle body permitting movement of the hooking section of the oscillating hook therein.

8. The U-shaped tube bend shrinkproof apparatus of claim 4, wherein a first fitting window and a second fitting window are symmetrically arranged on the extension portion of the handle body, the U-shaped tube bend shrinkproof apparatus further comprises a first cover detachably connected to the handle body for closing the first fitting window, and a second cover detachably connected to the handle body for closing the second fitting window, the hinge section of the swing hook and the transmission lever are located between the first fitting window and the second fitting window.

9. A hairpin bend shrinkproof apparatus of claim 1 or 2 further comprising a plurality of detents fixedly provided on the second end of the shank body, the plurality of detents being capable of being snapped into and mounting the shank body on the body of the tube expander.

10. A pipe expander comprising the U-tube bend shrinkproof apparatus according to any one of claims 1 to 9.

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