CN210586788U

CN210586788U - Pipe contracting equipment

Info

Publication number: CN210586788U
Application number: CN201921590782.3U
Authority: CN
Inventors: 曹厚婷; 罗勋
Original assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Current assignee: Hefei Hualing Co Ltd; Midea Group Co Ltd; Hefei Midea Refrigerator Co Ltd
Priority date: 2019-09-23
Filing date: 2019-09-23
Publication date: 2020-05-22
Anticipated expiration: 2029-09-23

Abstract

The utility model discloses a pipe contracting equipment, wherein, pipe contracting equipment includes stator module, rotor subassembly and anchor clamps subassembly, stator module includes that collar and interval inlay a plurality of stators on locating the lateral wall of collar, the rotor subassembly is including the pivot that has the activity groove and press from both sides the piece of knocking of locating in the activity groove, the piece of knocking is close to collar one end and is the arcwall face, and the border of arcwall face is equipped with the step of dodging the stator, anchor clamps subassembly sets up in the activity groove, when the rotatory axle center to the stator of rotor subassembly, the axle center of collar and the exogenic center of arcwall face are on same straight line, the piece of knocking is close to the one end and the stator butt of collar, the piece of knocking is close to the one end and the anchor clamps subassembly butt of anchor clamps subassembly, thereby the pressfitting anchor clamps subassembly, so that the clamp is. The utility model provides a draw the phenomenon that the pipe fitting takes place to hinge the pipe in the course of working can be avoided to the pipe equipment, improves the processing product qualification rate.

Description

Pipe contracting equipment

Technical Field

The utility model relates to a refrigeration plant accessory processing technology field especially relates to a draw equipment.

Background

In the production process of refrigeration appliances such as refrigerators (cabinets), air conditioners and the like, a refrigeration pipeline is an indispensable key component. In the production process, the connection of pipelines is an important process, and before the connection, the pipelines need to be correspondingly contracted so as to meet the process requirements, ensure the normal production and ensure the product quality. Pipe-reducing is a forming process in which a cylindrical member or pipe is reduced in diameter at its mouth by a pipe-reducing die. The required parts are obtained by pipe reducing processing, so that the working procedure can be shortened, and the material can be saved.

The working principle of the pipe reducing equipment is as follows: when the rotor and the fixture assembly do rotary motion together, the rotor continuously performs knocking motion with a plurality of stators arranged around the rotor to press fit the fixture assembly arranged in the rotor, so that pipe shrinking operation can be performed on pipe fittings which are arranged in the fixture assembly and continuously advance towards the inner end of the fixture assembly. At present, the pipe reducing equipment generally has the following technical defects: under normal conditions, the pipe fitting does not rotate along with the clamp assembly when the pipe shrinking operation is carried out, but the contact between the rotor and the stator is surface contact in the rotating process, so that the contact area is too large, the contact time between the pipe fitting and the clamp assembly is long, the pipe fitting is driven to rotate by the clamp assembly, and the pipe twisting phenomenon is caused; secondly, due to the fact that the size of the pipe fitting to be machined is uneven, when the size of the pipe fitting to be machined is too small, when the rotor and the stator are staggered, the gap between the clamp assemblies is too large, the pipe fitting to be machined is not contracted in a progressive state, but is directly abutted to the innermost end of the clamp assemblies, extrusion forming of the pipe fitting to be machined by the clamp assemblies is insufficient, when the rotor is abutted to the stator, the friction force of the pipe fitting to be machined can be increased due to the fact that the diameter of the pipe fitting to be machined is larger than the diameter of a clamping die cavity of the clamp assemblies, and vertical strip scratches occur on the pipe fitting to be machined; thirdly, because the throat shape of anchor clamps subassembly is circular, and treat the in-process that the processing pipe fitting was marching to the inner end of anchor clamps, the diameter of treating the processing pipe fitting is greater than the diameter that the anchor clamps subassembly carried out the throat all the time, and the throat of anchor clamps subassembly is formed by two anchor clamps concrete cooperations, when strikeing promptly at every turn, the R angle of two anchor clamps concrete laminating departments can be treated the processing pipe fitting and apply radial force, increase R angle and the frictional force of treating between the processing pipe fitting, thereby lead to treating the position that the processing subassembly corresponds two anchor clamps concrete laminating departments and can appear the mar.

In view of the above, there is a need for a pipe reducing apparatus which overcomes or alleviates at least one of the above-mentioned disadvantages of the prior art.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a draw equipment aims at solving current draw equipment and leads to the technical problem that the pipe fitting appears the hinge pipe phenomenon because rotor and stator contact surface are too big when carrying out the draw to the pipe fitting.

In order to achieve the purpose, the utility model provides a pipe reducing device, which comprises a frame, a rotary driving piece arranged on the frame and a pipe reducing device, wherein the pipe reducing device comprises a stator assembly, a rotor assembly and a clamp assembly, the stator assembly comprises an installation ring arranged on the frame and a plurality of stators embedded on the side wall of the installation ring at intervals; the rotor assembly is used for being connected with the rotary driving piece and comprises a rotating shaft with a movable groove and a knocking piece clamped in the movable groove, the rotating shaft is sleeved in the mounting ring and is coaxially arranged with the mounting ring, the stators are arranged on the same circumference around the rotating shaft, one end, close to the mounting ring, of the knocking piece is an arc-shaped surface, one end, close to the rotating shaft, of each stator is arranged in a protruding mode on the side wall and used for being abutted to the arc-shaped surface, and an avoiding step for avoiding the stators is arranged on the edge of the arc-shaped surface; the clamp assembly is arranged in the movable groove, when the axis of the stator, the axis of the mounting ring and the outer center of the arc-shaped surface are on the same straight line, the knocking piece is used for pressing the clamp assembly, so that the pipe to be processed clamped in the clamp assembly is extruded and deformed.

In an embodiment, the knocking part comprises an installation part arranged in the movable groove and a knocking part which is close to the installation part and extends out of the installation ring and is arranged in the movable groove, and one end of the knocking part, which is close to the installation ring, forms the arc-shaped surface.

In one embodiment, the installation part comprises two abutting surfaces abutted to the rotating shaft, a knocking surface and an installation surface, wherein the knocking surface and the installation surface are respectively connected with the two abutting surfaces, the knocking surface and the clamp assembly are oppositely arranged, the installation surface and the installation ring are oppositely arranged, the knocking portion is connected with the installation surface, and the avoiding step is formed between the edge of the arc-shaped surface and the installation surface.

In one embodiment, the stator comprises an embedded portion embedded in the side wall and a protruding portion connected with the embedded portion, the protruding portion protrudes out of the inner wall surface of the side wall, and the protruding portion is used for being abutted to the knocking portion.

In one embodiment, the rotating shaft comprises two clamping pieces which are arranged at intervals oppositely, the movable groove is formed between the two clamping pieces, the number of the knocking pieces is two, the two knocking pieces are arranged at intervals oppositely, and the clamp assembly is clamped in a containing space which is formed by the two clamping pieces and the two knocking pieces in a surrounding mode.

In an embodiment, the rotor assembly further includes two limiting parts accommodated in the movable groove, two of the limiting parts are respectively clamped with two of the clamping parts, two of the limiting parts are respectively abutted against two opposite sides of the knocking part, the limiting parts include limiting plates clamped on the clamping parts and bosses arranged on the limiting plates, and grooves matched with the bosses are arranged on the knocking part.

In an embodiment, the limiting plate includes the setting the clamping piece with the riser between the piece of strikeing, and divide and locate first diaphragm and the second diaphragm at riser both ends, first diaphragm, the second diaphragm with the riser form with the draw-in groove of clamping piece block.

In an embodiment, the clamp assembly includes a first clamp body and a second clamp body, the first clamp body and the second clamp body cooperate to form a clamping die cavity with an opening at one end, the clamping die cavity is used for clamping the pipe to be machined, and the two knocking pieces are respectively used for abutting against the first clamp body and the second clamp body so as to press the clamp assembly.

In one embodiment, the cross section of the clamping cavity is oval in a direction perpendicular to the feeding direction of the pipe to be processed.

In an embodiment, the clamping die cavity comprises a first tapered section, a second tapered section, a flat section and a divergent section which are connected in sequence, and the first tapered section is formed with the opening.

In the technical proposal of the utility model, as the pipe contracting device comprises a stator component, a rotor component and a clamp component, the stator component comprises a mounting ring arranged on the frame and a plurality of stators embedded on the side wall of the mounting ring at intervals, the rotor component comprises a rotating shaft with a movable groove and a knocking piece clamped in the movable groove, one end of the knocking piece close to the mounting ring is an arc-shaped surface, and the edge of the arc surface is provided with an avoiding step for avoiding the stator, the clamp assembly is arranged in the movable groove, namely, the knocking piece can avoid contacting with the stator part through the avoiding step, so that when the rotor assembly rotates until the axis of the stator, the axis of the mounting ring and the outer center of the arc-shaped surface are on the same straight line, the arc-shaped surface of one end, close to the mounting ring, of the knocking piece is abutted against the stator, and the other end of the knocking piece is pressed on the clamp assembly, so that the pipe to be processed clamped in the clamp assembly is extruded and deformed; the rotor assembly continues to rotate, and in the process that the knocking piece is far away from the last abutted stator and moves towards the next stator, because the arc-shaped surface of one end, close to the mounting ring, of the knocking piece is not abutted to the stator any more, the knocking piece slightly moves towards the mounting ring under the action of the rotating centrifugal force, so that the clamp assemblies cannot be pressed, gaps are formed among the clamp assemblies, and the pipe fitting to be machined in the clamp assemblies cannot be extruded and deformed; when the rotor assembly rotates to the axis of the next stator, the axis of the mounting ring and the outer center of the arc-shaped surface on the same straight line again, the knocking action is repeated so as to finish the pipe reducing operation of the pipe reducing equipment on the pipe to be processed. The utility model discloses in, dodge the step through the setting, with reduce the stator and strike area of contact between the piece, make only when the rotatory axle center to the stator of rotor subassembly, the axle center of collar and the exogenic center of arcwall face when on same straight line, strike the piece and accomplish the action of strikeing with the stator butt, shorten the contact time between anchor clamps subassembly and the pipe fitting of waiting to process, thereby can avoid appearing waiting to process the pipe fitting and follow the rotatory phenomenon that appears the hinge pipe of anchor clamps subassembly, improve the qualification rate of waiting to process pipe fitting draw processing.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of a pipe contracting apparatus of the present invention;

fig. 2 is another schematic structural view of the pipe contracting device of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a schematic structural view of the knocking member of the present invention;

fig. 5 is a schematic structural view of a limiting member in the present invention;

fig. 6 is a schematic structural view of the clamp assembly of the present invention.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

The reference numbers illustrate:

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 4, according to an aspect of the present invention, there is provided a pipe reducing apparatus, the pipe reducing apparatus includes a frame (not shown), a rotary driving member (not shown) disposed on the frame, and a pipe reducing device, wherein the pipe reducing device includes a stator assembly 1, a rotor assembly 2, and a clamp assembly 3, the stator assembly 1 includes a mounting ring 11 disposed on the frame, and a plurality of stators 12 embedded at intervals on a side wall (not shown) of the mounting ring 11, the rotor assembly 2 is configured to be connected to the rotary driving member, the rotor assembly 2 includes a rotating shaft (not shown) having a movable groove (not shown) and a knocking member 22 clamped in the movable groove, the rotating shaft is sleeved in the mounting ring 11 and is disposed coaxially with the mounting ring 11, the plurality of stators 12 are disposed on a same circumference around the rotating shaft, one end of the knocking member 22 close to the mounting ring 11 is an arc surface 224, one end of the stators 12 close to the rotating shaft protrudes from the, the edge of the arc-shaped surface 224 is provided with an avoiding step (not marked) avoiding the stator 12, the clamp assembly 3 is arranged in the movable groove, and when the axis of the stator 12, the axis of the mounting ring 11 and the outer center of the arc-shaped surface 224 are on the same straight line, the knocking piece 22 is used for pressing the clamp assembly 3, so that the assembly to be processed clamped in the clamp assembly 3 is extruded and deformed. The utility model discloses in, what need explain very much is that the material hardness of anchor clamps subassembly 3 should be greater than the material hardness of waiting to process the pipe fitting, and it can be the aluminum product pipe fitting to wait to process the pipe fitting, and of course other suitable materials also can.

In the technical scheme of the utility model, because the pipe reducing device comprises a stator assembly 1, a rotor assembly 2 and a clamp assembly 3, and the stator assembly 1 comprises a mounting ring 11 arranged on the frame and a plurality of stators 12 embedded on the side wall of the mounting ring 11 at intervals, the rotor assembly 2 comprises a rotating shaft with a movable groove and a knocking piece 22 clamped in the movable groove, one end of the knocking piece 22 close to the mounting ring 11 is an arc surface 224, and the edge of the arc surface 224 is provided with an avoiding step avoiding the stators 12, the clamp assembly 3 is arranged in the movable groove, namely, the knocking piece 22 can avoid partial contact with the stators 12 by avoiding the step, so that when the rotor assembly 2 rotates to the axis of the stators 12, the axis of the mounting ring 11 and the outer center of the arc surface 224 are on the same straight line, the arc surface 224 close to one end of the mounting ring 11 abuts against the stators 12, the other end of the knocking piece 22 presses the clamp assembly 3, so that the pipe to be processed clamped in the clamp assembly 3 is extruded and deformed; the rotor assembly 2 continues to rotate, and in the process that the knocking piece 22 is far away from the last abutted stator 12 and moves towards the next stator 12, because the arc-shaped surface 224 of one end, close to the mounting ring 11, of the knocking piece 22 is not abutted to the stator 12 any more, the knocking piece 22 moves slightly towards the mounting ring 11 under the action of the rotating centrifugal force, so that the clamp assemblies 3 cannot be pressed, gaps are formed among the clamp assemblies 3, and the pipe fittings to be processed in the clamp assemblies 3 cannot be extruded and deformed; when the rotor assembly 2 rotates again until the axis of the next stator 12, the axis of the mounting ring 11 and the outer center of the arc-shaped surface 224 are on the same straight line, the knocking action is repeated so as to complete the pipe reducing operation of the pipe reducing equipment on the pipe to be processed. The utility model discloses in, dodge the step through the setting, with the area of contact who reduces stator 12 and strikes a 22, make only when the rotatory axle center to stator 12 of rotor subassembly 2, the axle center of collar 11 and the exogenic center of arcwall face 224 are on same straight line, strike a 22 and accomplish with stator 12 butt and strike the action, shorten anchor clamps subassembly 3 and wait to process the contact time between the pipe fitting, thereby can avoid appearing waiting to process the pipe fitting and follow anchor clamps subassembly 3 rotatory and the phenomenon of hinge pipe appears, the qualification rate of waiting to process pipe fitting shrink processing is improved.

Further, the knocking member 22 includes a mounting portion 221 disposed in the movable groove near the clamp assembly 3, and a knocking portion 222 protruding from the mounting portion 221 to be disposed in the movable groove near the mounting ring 11, and an end of the knocking portion 222 near the mounting ring 11 forms an arc-shaped surface 224. The surface of the end of the mounting part 221 close to the clamp assembly 3 can be completely attached to the surface of the end of the clamp assembly 3 close to the mounting part 221, so that when the clamp assembly 3 is abutted, the pipe to be processed in the clamp assembly 3 is fully extruded and deformed. One end of the knocking portion 222 close to the mounting ring 11 is an arc-shaped surface 224, that is, when the knocking member 22 rotates until the axial center of the stator 12, the axial center of the mounting ring 11 and the outer center of the arc-shaped surface 224 are aligned, the arc-shaped surface 224 of the knocking portion 222 contacts with the stator 12, so as to reduce the contact area between the knocking member 22 and the stator 12 during the rotation.

Specifically, the mounting portion 221 includes two abutting surfaces 225 abutting against the rotating shaft, a knocking surface 226 and a mounting surface 227, wherein the knocking surface 226 and the mounting surface 227 are respectively connected with the two abutting surfaces 225, the knocking surface 226 is arranged opposite to the clamp assembly 3, the mounting surface 227 is arranged opposite to the mounting ring 11, the knocking portion 222 is connected with the mounting surface 227, and an avoiding step is formed between the edge of the arc-shaped surface 224 and the mounting surface 227. In this embodiment, the mounting surface 227 is smoothly connected with the edge of the arc surface 224, and the surface avoiding the step is a curved surface; in another embodiment, the mounting surface 227 and the arcuate surface 224 form a fold therebetween at an angle to one another. By providing the relief step, the contact area between the arc-shaped surface 224 and the stator 12 is reduced as much as possible without reducing the width of the mounting portion 221. The length of the mounting part 221 is consistent with the depth of the movable groove, that is, consistent with the feeding and discharging direction of the pipe to be processed, and the width of the mounting part is consistent with the width of the movable groove.

Meanwhile, the stator 12 includes an embedded portion 121 embedded in the side wall and a protruding portion 122 connected to the embedded portion 121, the protruding portion 122 protrudes from the inner wall surface of the mounting ring 11, and the protruding portion 122 is used for abutting against the knocking portion 222, so that the mounting portion 221 presses the fixture assembly 3. More specifically, the stator 12 may be a cylinder or a semi-cylinder embedded in the mounting ring 11, and the surface of the protrusion 122 protruding from the inner wall surface of the mounting ring 11 is an arc surface, that is, the contact between the striking piece and the stator is the line contact between the arc surface of the protrusion 122 and the arc surface 224 of the striking part 222. In this embodiment, the mounting ring is tubular surrounded by sidewalls.

In one embodiment, the rotating shaft comprises two clamping pieces 21 which are oppositely arranged at intervals, a movable groove is formed between the two clamping pieces 21, the number of the knocking pieces 22 is two, the two knocking pieces 22 are oppositely arranged at intervals, and the clamp assembly 3 is clamped in a containing space defined by the two clamping pieces 21 and the two knocking pieces 22. Namely, the pipe can be knocked in two directions while knocking action is carried out once, so that the pipe shrinking processing efficiency is improved.

Specifically, the rotor assembly 2 further includes two limiting members 4 accommodated in the movable groove, the two limiting members 4 are respectively engaged with the two clamping members 21, the two limiting members 4 are respectively abutted against two opposite sides of the knocking member 22, the limiting members 4 include a limiting plate 41 clamped on the clamping member 21 and a boss 42 arranged on the limiting plate 41, and the knocking member 22 is provided with a groove 223 engaged with the boss 42. In an embodiment, the two limiting members 4 are respectively disposed on two sides of the two knocking members 22, the number of the bosses 42 may be two, and the two bosses 42 may be disposed on the same limiting plate 41 to respectively correspond to the grooves 223 respectively formed on the two knocking members 22; in another embodiment, the number of the bosses 42 may be four, two bosses 42 are respectively disposed on each limiting plate 41, and the two bosses 42 on the same limiting plate 41 are respectively matched with the grooves 223 respectively disposed on the two knocking elements 22. In addition, a gap of 0.5mm can exist when the groove 223 and the boss 42 are matched, so that when the knocking part 22 is abutted to the stator 12, the knocking part 22 and the clamp assembly 3 are in a gapless state, the pipe wall of a pipe fitting to be processed can be clamped, and the purpose of deformation is achieved; and when knocking piece 22 is far away from stator 12, the clearance between the clamp assemblies 3 is kept within the range of 1mm, thereby avoiding that the clearance between pipe fitting undersize and the clamp assemblies 3 is too big when waiting to process, leading to the disposable distance of marcing to the clamp assemblies 3 of pipe fitting of waiting to process too big, the diameter of the pipe fitting of waiting to process of the inner end of the clamp assemblies 3 is greater than the reducing pipe diameter of the clamp assemblies 3, thereby increasing the friction force between the clamp assemblies 3 and the pipe fitting of waiting to process, and the phenomenon that the pipe wall fish tail appears in the pipe fitting of waiting to process.

Further, referring to fig. 4, the position limiting plate 41 includes a vertical plate 411 disposed between the clamping member 21 and the striking member 22, and a first transverse plate 412 and a second transverse plate 413 disposed at both ends of the vertical plate 411, the first transverse plate 412, the second transverse plate 413, and the vertical plate 411 forming a catching groove for catching the clamping member 21. So that the limiting member 4 can be clamped on the clamping member 21, and the stability of the limiting member 4 rotating along with the clamping member 21 is ensured.

In an embodiment, the clamp assembly 3 includes a first clamp body 31 and a second clamp body 32, the first clamp body 31 and the second clamp body 32 cooperate to form a clamping cavity 33 having an opening at one end, the clamping cavity 33 is used for clamping a pipe to be processed, and the two knocking members 22 are respectively used for abutting against the first clamp body 31 and the second clamp body 32 to press the clamp assembly 3. More specifically, the clamping cavity 33 may have an oval cross-section perpendicular to the direction of feed of the pipe to be worked. The number of stators 12 may be 12, and 12 stators 12 are evenly spaced on the same circumference of the mounting ring 11. When the knocking piece 22 and the stator 12 are knocked for the first time, the pipe to be processed extending into the clamping cavity 33 is extruded and deformed into an oval shape consistent with the clamping cavity 33, when the pipe to be processed continues to extend into the clamping cavity 33 for knocking for the second time, the pipe to be processed does not rotate along with the clamp assembly 3, namely, when the pipe is knocked for the second time, the long axis endpoint of the oval clamping cavity 33 can rotate by 30 degrees, and is staggered with the long axis endpoint of the oval pipe to be processed, the long axis endpoint of the clamping cavity 33 is just the R angle of the superposition position of the first clamp body 31 and the second clamp body 32, at the moment, when the clamp assembly 3 extrudes and deforms the pipe to be processed again, the oval surface of the pipe to be processed is kept away from the R angle of the superposition position of the first clamp body 31 and the second clamp body 32, and therefore the scratch caused by the contact of the R angle and the. And then strike at every turn, the R angle of the coincidence department of first anchor clamps 31 and second anchor clamps 32 can not contact with the pipe fitting of waiting to process to can promote the qualification rate of waiting to process the pipe fitting reducing processing.

In an embodiment, the clamp cavity 33 may include a first tapered section 34, a second tapered section 35, a flat section 36, and a diverging section 37 connected in series, the first tapered section 34 being formed with an opening. First tapered section 34 may taper from a first diameter R1 to a second diameter R2, first diameter R1 may be 6mm, second diameter R2 may be 3.75mm, and first tapered section 34 may be 8mm in length to facilitate insertion of the pipe to be worked into clamp cavity 33 by a human employee; the second tapered section 35 may be tapered from the second diameter R2 to a third diameter R3, the third diameter R3 may be 2.5mm, and the length of the second tapered section 35 may be 50mm, the second tapered section 35 is mainly used to complete a reducing pipe; the flat section 36 is stable to be third diameter R3, and the length of flat section 36 can be 3mm, the stability of throat size can effectively be guaranteed to flat section 36 promptly, divergent section 37 can be by third diameter R3 divergent fourth diameter R4, fourth diameter R4 can be 3mm, and divergent section 37's length can be 34mm, divergent section 37 can play the guide effect, and the rear end of waiting to process the pipe fitting when avoiding strikeing shakes the increase friction from top to bottom with anchor clamps subassembly 3, lead to waiting to process the pipe wall production mar of pipe fitting.

The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a draw pipe equipment, draw pipe equipment includes the frame, sets up rotatory driving piece and draw the pipe device in the frame, its characterized in that, draw the pipe device and include:

the stator assembly comprises a mounting ring arranged on the rack and a plurality of stators embedded on the side wall of the mounting ring at intervals;

the rotor assembly is used for being connected with the rotary driving piece and comprises a rotating shaft with a movable groove and a knocking piece clamped in the movable groove, the rotating shaft is sleeved in the mounting ring and is coaxially arranged with the mounting ring, the stators are arranged on the same circumference around the rotating shaft, one end, close to the mounting ring, of the knocking piece is an arc-shaped surface, one end, close to the rotating shaft, of each stator protrudes out of the side wall and is used for abutting against the arc-shaped surface, and an avoiding step for avoiding the stator is arranged on the edge of the arc-shaped surface;

the clamp assembly is arranged in the movable groove, when the axis of the stator, the axis of the mounting ring and the outer center of the arc-shaped surface are on the same straight line, the knocking piece is used for pressing the clamp assembly, so that the pipe to be processed in the clamp assembly is clamped and deformed in an extrusion mode.

2. A pipe contracting apparatus according to claim 1, wherein the striking member includes an installation portion disposed in the movable groove and a striking portion extending from the installation portion to a position close to the installation ring and disposed in the movable groove, the striking portion forming the arc-shaped surface near one end of the installation ring.

3. A pipe contracting apparatus according to claim 2, wherein the mounting portion includes two abutting surfaces abutting against the rotating shaft, a striking surface and a mounting surface respectively connecting the two abutting surfaces, the striking surface is disposed opposite to the clamp assembly, the mounting surface is disposed opposite to the mounting ring, the striking portion is connected to the mounting surface, and the avoiding step is formed between the edge of the arc-shaped surface and the mounting surface.

4. A pipe contracting apparatus according to claim 2, wherein the stator includes an embedding portion embedded in the side wall and a protruding portion connected to the embedding portion, the protruding portion protruding from an inner wall surface of the side wall, the protruding portion being adapted to abut against the striking portion.

5. A pipe contracting device according to any one of claims 1 to 4, wherein the rotating shaft comprises two clamping members which are oppositely arranged at intervals, the movable groove is formed between the two clamping members, the number of the knocking members is two, the two knocking members are oppositely arranged at intervals, and the clamp assembly is clamped in a containing space which is surrounded by the two clamping members and the two knocking members.

6. A pipe contracting equipment according to claim 5, wherein the rotor assembly further comprises two limiting parts accommodated in the movable groove, the two limiting parts are respectively clamped with the two clamping parts, the two limiting parts are respectively abutted against the two opposite sides of the knocking part, the limiting parts comprise limiting plates clamped on the clamping parts and bosses arranged on the limiting plates, and grooves matched with the bosses are arranged on the knocking part.

7. A pipe contracting equipment according to claim 6, wherein the limiting plate comprises a vertical plate arranged between the clamping piece and the knocking piece, and a first transverse plate and a second transverse plate which are respectively arranged at two ends of the vertical plate, and the first transverse plate, the second transverse plate and the vertical plate form clamping grooves clamped with the clamping piece.

8. The pipe contracting equipment according to claim 5, wherein the clamp assembly comprises a first clamp body and a second clamp body, the first clamp body and the second clamp body are matched to form a clamping die cavity with an opening at one end, the clamping die cavity is used for clamping the pipe fitting to be processed, and the two knocking pieces are respectively used for abutting against the first clamp body and the second clamp body so as to press the clamp assembly.

9. A pipe shrinking apparatus according to claim 8, wherein said clamping cavity has an elliptical cross-section in a direction perpendicular to a feeding direction of said pipe to be processed.

10. A pipe reducing apparatus according to claim 8, wherein said clamp cavity comprises a first tapered section, a second tapered section, a flat section and a diverging section connected in series, said first tapered section forming said opening.