CN215033250U

CN215033250U - Inner core for producing threaded pipe

Info

Publication number: CN215033250U
Application number: CN202121477720.9U
Authority: CN
Inventors: 张旭辉; 罗应江; 张德志; 李玉林; 杨中辉
Original assignee: Chongqing Longyu Precise Copper Tube Co ltd
Current assignee: Chongqing Longyu Precise Copper Tube Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2021-12-07
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to a tubular metal resonator processing technology field specifically discloses inner core is used in screwed pipe production, including core bar, screw thread core and the core that moves about, screw thread core with move about the equal fixed connection of core on the core bar, the tip fixedly connected with ball spare of core bar, the ball spare can paste with the tubular product inner wall mutually, the ball spare is close to the core that moves about. This scheme is used for solving the unsmooth problem of disconnected pipe in the screwed pipe forming process who causes of tubular product inner wall among the prior art.

Description

Inner core for producing threaded pipe

Technical Field

The utility model relates to a tubular metal resonator processing technology field specifically is inner core is used in screwed pipe production.

Background

The method comprises the following steps that internal threads are sometimes required to be machined on some metal tubes with soft texture, such as copper tubes and aluminum tubes, so that the heat dissipation effect or the heat conduction effect of the metal tubes is enhanced, the machined tubes with the internal threads are called threaded tubes, the threaded tubes are generally formed by spinning, a spinning ring and an inner core are required during spinning, a steel ball is arranged on the spinning ring, and when the spinning ring rotates, the steel ball not only rotates but also revolves; the inner core is fixedly provided with a thread core head and a moving core head, and when the spinning ring rotates, the inner core integrally rotates; in the forming process, the pipe is reduced by a moving stretching die, then the pipe moves forwards to a position between a thread core print and a spinning ring, the steel ball on the spinning ring is used for extruding the outer wall of the pipe, and the metal on the pipe is rolled onto the tooth socket of the thread core print, so that the internal thread processing of the pipe is completed; the pipe is drawn by the traction equipment in the inner thread forming process, so that the inner thread processing of the inner wall of the pipe is completed in the moving process of the pipe.

However, in the process of processing the threaded pipe, because the pipe is continuously molded, the pipe to be molded is mostly coiled and rolled up in a disc shape, although the pipe to be processed needs to be straightened by straightening equipment, the pipe inevitably has the condition of crease in the straightening process because the pipe is soft in texture; furthermore, the pipe to be processed may present depressions in itself; the inner wall of the pipe is not completely smooth due to the problems, and the pipe is easily broken due to the fact that the pipe is drawn by the drawing device and the friction between the inner core and the spinning ring is generated in the inner thread forming process due to the non-smooth inner wall.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the intention is providing inner core for the screwed pipe production to solve the problem of the disconnected pipe in the screwed pipe forming process that the tubular product inner wall unsmooth caused among the prior art.

In order to achieve the above object, the basic scheme of the present invention is as follows:

inner core is used in screwed pipe production, including core bar, screw thread core and the core that moves about, screw thread core with move about the equal fixed connection of core on the core bar, the tip fixedly connected with ball spare of core bar, the ball spare can paste with the tubular product inner wall mutually, the ball spare is close to the core that moves about.

Compare the beneficial effect in prior art:

when this scheme of adoption, tubular product is at the forming process, and the whole continuous at the tubular product internal rotation of inner core, rotates the in-process, and the ball spare is used in on the tubular product inner wall, and then with the tubular product inner wall originally sunken place ejecting, has guaranteed the smoothness of tubular product inner wall, and then has reduced the probability of broken pipe in the screwed pipe forming process.

Furthermore, the round ball piece is in threaded connection with the core rod, the moving core head is in threaded connection with the core rod, and the round ball piece can enable the moving core head to be tightly abutted against the core rod.

Has the advantages that: the spherical piece can be used for smoothening the pipe and can also realize the fixation of the moving core head on the core rod; the threaded connection of the moving core head and the core rod facilitates the replacement of the damaged moving core head, and meanwhile, the replacement cost of the damaged inner core can be reduced.

Furthermore, two opposite flat surfaces are arranged on the round ball piece.

Has the advantages that: through the arrangement of the flat surface, a wrench can conveniently act on the flat surface, and the locking of the spherical piece on the core rod is realized.

Furthermore, a first gasket can be sleeved on the core rod, and the first gasket is positioned at the end part of the floating core head.

Has the advantages that: through the setting of first gasket, be favorable to the ball piece on the one hand to be in the core bar with the core print locking that moves about, on the other hand, the setting through first gasket can be adjusted the position of moving about on the core bar, reinforcing suitability.

Further, the outer diameter of the first gasket is smaller than or equal to the outer diameter of the floating core head.

Furthermore, a second gasket can be sleeved on the core rod and is positioned at the end part of the threaded core head, the threaded core head is in threaded connection with the core rod, and a locking piece for fixing the threaded core head on the core rod is arranged on the core rod.

Has the advantages that: through the arrangement of the second gasket, the locking piece is favorable for locking the threaded core print on the core rod, and on the other hand, the position of the threaded core print on the core rod can be adjusted through the arrangement of the second gasket, so that the applicability is enhanced; and the threaded connection of the thread core head and the core rod is convenient for replacing the damaged thread core head, and meanwhile, the replacement cost of the damaged inner core can be reduced.

Further, the locking piece adopts a hexagonal nut.

Has the advantages that: the hexagonal nut is simple in structure and easy to realize as a locking piece.

Further, the core bar comprises a middle section and two side sections, the two side sections are symmetrically arranged relative to the middle section, and the two side sections are respectively used for installing the moving core heads and the thread core heads.

Has the advantages that: the side sections of the core rod are symmetrically arranged relative to the middle section, so that the mounting difficulty of the core rod, the moving core head and the thread core head is reduced.

Drawings

Fig. 1 is an isometric view of a threaded pipe according to an embodiment of the present invention after the assembly of an inner core is completed;

FIG. 2 is a top view of FIG. 1;

fig. 3 is an exploded view of the inner core for a threaded pipe according to an embodiment of the present invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the core rod comprises a core rod 1, a middle section 11, a side section 12, a threaded core print 2, a moving core print 3, a round ball piece 4, a round ball section 41, a cylindrical section 42, a first gasket 5, a second gasket 6 and a locking piece 7.

Examples

The embodiment is basically as shown in the attached figures 1 to 3:

inner core is used in screwed pipe production, including core bar 1, screw thread core 2 and the core 3 that moves about, core bar 1 includes integrated into one piece's interlude 11 and limit section 12, and the quantity of limit section 12 is two, and limit section 12 sets up about 11 symmetries of interlude, is equipped with the screw thread on the limit section 12, and two limit sections 12 move about core 3 and screw thread core 2 through the screw thread installation respectively, and 2 upper surface integrated into one piece of screw thread core have a screw thread, and the external diameter of interlude 11 is greater than the external diameter of limit section 12.

The edge section 12 for mounting the floating core head 3 is connected with a spherical part 4 through threads, the spherical part 4 comprises a spherical part 41 and a cylindrical part 42 which are integrally formed, the outer diameter of the cylindrical part 42 is smaller than that of the spherical part 41, the spherical part 41 can be attached to the inner wall of a pipe, the cylindrical part 42 is provided with internal threads, and the cylindrical part 42 can be locked on the edge section 12 of the core rod 1 through threads; the ball piece 4 can tightly support the moving core head 3 on the core rod 1, and the cylindrical section 42 is integrally formed with two opposite flat surfaces which are convenient for a wrench to clamp the ball piece 4.

The first gasket 5 can be sleeved on the side section 12 of the core rod 1, the first gasket 5 is positioned at the end part of the floating core head 3, and in specific use, the first gasket 5 is increased or decreased according to actual use requirements.

The outer diameter of the first spacer 5 is not more than the outer diameter of the floating core 3.

A second gasket 6 can be sleeved on the side section 12 of the core rod 1, the second gasket 6 is positioned at the end part of the threaded core print 2, a locking part 7 for fixing the threaded core print 2 on the core rod 1 is arranged on the core rod 1, and the locking part 7 adopts a hexagon nut; in specific use, the second gasket 6 is added or reduced according to actual use requirements.

The specific implementation process is as follows:

when the inner core needs to be used, the threaded core head 2 and the moving core head 3 are screwed into the side section 12 of the core rod 1 respectively, whether the first gasket 5 and the second gasket 6 are installed or not is selected according to actual use requirements, finally, the spherical piece 4 is screwed on one side of the moving core head 3 of the core rod 1, the locking piece 7 is screwed on one side of the threaded core head 2 of the core rod 1, and the assembly of the inner core for producing the threaded pipe is completed.

The inner core of the embodiment is simple in structure, and is very simple to replace when the moving core head 3 and the thread core head 2 are damaged, so that the replacement cost of the inner core is reduced.

In addition, in this embodiment, tubular product is at the forming process, and the whole continuous at tubular product internal rotation of inner core, rotates the in-process, and ball 4 is used in the tubular product inner wall, and then with the tubular product inner wall originally sunken place ejecting, has guaranteed the smoothness of tubular product inner wall, and then has reduced the probability of broken pipe in the screwed pipe forming process.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. Inner core is used in screwed pipe production, including core bar, screw thread core and the core that moves about, screw thread core with move about the equal fixed connection of core on the core bar, its characterized in that: the end part of the core rod is fixedly connected with a round ball piece, the round ball piece can be attached to the inner wall of the pipe, and the round ball piece is close to the moving core head.

2. The threaded pipe production core according to claim 1, wherein: the round ball piece is in threaded connection with the core rod, the moving core head is in threaded connection with the core rod, and the round ball piece can enable the moving core head to be tightly abutted to the core rod.

3. The threaded pipe production core according to claim 2, wherein: two opposite flat surfaces are arranged on the round ball piece.

4. The threaded pipe production core according to claim 2, wherein: the core rod can be sleeved with a first gasket, and the first gasket is positioned at the end part of the floating core head.

5. The threaded pipe production core according to claim 4, wherein: the outer diameter of the first gasket is smaller than or equal to that of the floating core head.

6. The threaded pipe production core according to claim 1, wherein: the core rod can be sleeved with a second gasket, the second gasket is located at the end of the threaded core head, the threaded core head is in threaded connection with the core rod, and a locking piece for fixing the threaded core head on the core rod is arranged on the core rod.

7. The threaded pipe production core as claimed in claim 6, wherein: the locking piece adopts a hexagonal nut.

8. The threaded pipe production core according to claim 1, wherein: the core bar comprises a middle section and two side sections, the two side sections are symmetrically arranged relative to the middle section, and the two side sections are respectively used for installing the moving core head and the thread core head.