CN213575985U

CN213575985U - Spiral steel pipe with self-lubricating pipe joint

Info

Publication number: CN213575985U
Application number: CN202022528833.9U
Authority: CN
Inventors: 陈术
Original assignee: Ningbo Shuangde Metal Pipe Co ltd
Current assignee: Ningbo Shuangde Metal Pipe Co ltd
Priority date: 2020-11-04
Filing date: 2020-11-04
Publication date: 2021-06-29
Anticipated expiration: 2030-11-04

Abstract

The utility model discloses a spiral steel pipe with a self-lubricating pipe joint, which comprises a first threaded pipe section, a middle unthreaded pipe section and a second threaded pipe section which are connected in sequence, wherein the outer peripheral walls of the first threaded pipe section and the second threaded pipe section are respectively provided with a thread groove; the one end of keeping away from middle unthreaded pipeline section of first screw thread pipeline section is equipped with the coupling, and the outer end of coupling is equipped with the internal thread, and the internal thread is gone up the stride and is equipped with along the horizontal lubrication groove that extends, and the extending direction of lubrication groove is parallel with spiral steel pipe's axial, and the groove depth of lubrication groove on the coupling inner wall is greater than the internal thread degree of depth, has placed solid lubricant in the lubrication groove. The groove depth of lubrication groove is greater than the internal thread degree of depth for behind the solid lubricating piece card income lubrication groove, can flush with internal thread line bottom, can not influence the threaded connection of coupling and thin wall water pipe, but can form better self-lubricating effect to threaded connection position.

Description

Spiral steel pipe with self-lubricating pipe joint

Technical Field

The utility model relates to a spiral steel pipe technical field, concretely relates to spiral steel pipe with self-lubricating coupling.

Background

The spiral steel pipe is made by rolling the low carbon structural steel or low alloy structural steel strip into pipe blank according to a certain spiral angle (also called forming angle), then welding the seam of pipe and supporting, its advantage is that it can use narrower strip steel to produce large diameter steel pipe.

Some spiral steel pipes are provided with threads on the outer surface in actual use, but the thread profile processed on the surface of the spiral steel pipe is changed and the thickness of the steel pipe is reduced, so that the pipe wall strength of the spiral steel pipe is reduced. In some scenes of supporting and quickly transferring heat by using the spiral steel pipe as the outer sleeve, the thin-wall water pipe is sleeved in the spiral steel pipe, the thin-wall water pipe is screwed at the pipe joint of the spiral steel pipe by virtue of the pipe joint integrally designed at one end of the spiral steel pipe, but after the spiral steel pipe and the thin-wall water pipe are screwed and connected by virtue of the internal threads of the pipe joint after long-time use, after inevitable slight corrosion occurs, the inner wall of the pipe joint is not lubricated, so that the thin-wall water pipe is difficult to unscrew and draw out from the spiral steel pipe.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical defects, the utility model adopts the technical scheme that a spiral steel pipe with a self-lubricating pipe joint is provided, which comprises a first threaded pipe section, a middle unthreaded pipe section and a second threaded pipe section which are connected in sequence, wherein the outer peripheral walls of the first threaded pipe section and the second threaded pipe section are respectively provided with a thread groove; the end, far away from the middle unthreaded pipe section, of the first threaded pipe section is provided with a pipe joint, the outer end of the pipe joint is provided with an internal thread, the internal thread is transversely provided with a lubricating groove extending horizontally in a crossing mode, the extending direction of the lubricating groove is parallel to the axial direction of the spiral steel pipe, the depth of the lubricating groove on the inner wall of the pipe joint is larger than that of the internal thread, and a solid lubricating block is placed in the lubricating groove.

Furthermore, the bottom of the lubricating groove is provided with a plurality of uniformly distributed contact pins, and the solid lubricating block is tightly inserted on the contact pins.

Further, the coaxial ring groove that is equipped with on the outer wall of middle unthreaded pipeline section, ring groove's tank bottom is equipped with the oil storage tank, the tank bottom of oil storage tank is equipped with the oilhole that crosses through middle unthreaded pipeline section, semi-solid lubricating grease has been placed in the oil storage tank, still be equipped with on the middle unthreaded pipeline section and be used for encircleing ring groove in order to seal the sealing strip of oil storage tank notch.

Furthermore, the sealing strip is long-strip-shaped, the middle section of the sealing strip is a rubber strip, the two ends of the sealing strip are textile fiber blocks, one end of the sealing strip is provided with a thread-gluing tape hair surface, the other end of the sealing strip is provided with a thread-gluing tape hook surface, and the thread-gluing tape hook surface is matched and bonded with the thread-gluing tape hair surface.

Furthermore, the groove depth of the annular clamping groove is 2-4mm, the oil storage groove is a circular hole groove, and the diameter of the oil storage groove is 7-9 mm.

Furthermore, a plurality of assembling blocks with insertion holes are arranged on the outer peripheral wall of the pipe joint at equal intervals.

Compared with the prior art the utility model discloses technical scheme's beneficial effect does:

the utility model provides a spiral steel pipe with self-lubricating pipe joint, through improving the structure of spiral steel pipe, set it into the first screw thread pipeline section, middle unthreaded pipeline section and the second screw thread pipeline section that connect gradually this three-section tubular structure, can promote the structural strength in the middle part of spiral steel pipe; the tip of first screw thread pipeline section is equipped with integrated coupling, is equipped with the lubrication groove of indent on the internal thread of coupling inner wall for place solid lubrication piece, because the groove depth of lubrication groove is greater than the internal thread degree of depth, make solid lubrication piece card go into behind the lubrication groove, can flush with internal screw thread line bottom, can not influence the threaded connection of coupling and thin wall water pipe, but can form better self-lubricating effect to the threaded connection position again.

Drawings

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

Fig. 1 is a perspective view of a spiral steel pipe with a self-lubricating pipe joint according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

fig. 4 is a schematic structural diagram of a thin-walled water pipe adapted to a spiral steel pipe with a self-lubricating pipe joint according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a sealing tape according to an embodiment of the present invention.

The reference numbers are as follows:

1. the pipe comprises a first threaded pipe section, a second threaded pipe section, a middle unthreaded pipe section, a third threaded pipe section, a fourth threaded pipe section, a pipe joint, a fifth threaded pipe section, a sixth threaded pipe section.

Detailed Description

The invention will be further explained with reference to the drawings and the specific embodiments.

Example 1

Referring to fig. 1-5, the spiral steel pipe with a self-lubricating pipe joint provided by the present invention includes a first threaded pipe section 1, a middle unthreaded pipe section 2 and a second threaded pipe section 3, which are connected in sequence, wherein the outer peripheral walls of the first threaded pipe section 1 and the second threaded pipe section 3 are respectively provided with a thread groove; the end of the first threaded pipe section 1, which is far away from the middle unthreaded pipe section 2, is provided with a pipe joint 4, the outer end of the pipe joint 4 is provided with internal threads 5, the internal threads 5 are transversely provided with a lubricating groove 6 extending along the horizontal direction in a crossing manner, the extending direction of the lubricating groove 6 is parallel to the axial direction of the spiral steel pipe, the depth of the lubricating groove 6 on the inner wall of the pipe joint 4 is larger than that of the internal threads 5, and a solid lubricating block (not shown in the figure) is placed in the lubricating groove. Wherein, the solid lubricating block is a rectangular block.

The structure strength of the middle part of the spiral steel pipe can be improved by improving the structure of the spiral steel pipe and arranging the spiral steel pipe into a three-section pipe structure of a first threaded pipe section 1, a middle unthreaded pipe section 2 and a second threaded pipe section 3 which are sequentially connected; the tip of first screw thread pipeline section 1 is equipped with integrated coupling 4, is equipped with the lubrication groove 6 of indent on the internal thread 5 of coupling 4 inner wall for place solid lubrication piece, because the groove depth of lubrication groove 6 is greater than the 5 degree of depth of internal thread, make solid lubrication piece card go into in the lubrication groove 6 after, can flush with the line bottom of internal thread 5, can not influence the threaded connection of coupling 4 and thin wall water pipe 13, but can form better self-lubricating effect to the threaded connection position. The thin-wall water pipe 13 may have threads on one side or both ends.

To facilitate the expansion connection of the spiral steel pipe, it is preferable that the outer circumferential wall of the pipe joint 4 is provided with a plurality of fitting blocks 12 with insertion holes at equal intervals. Specifically, the end of the second threaded pipe section 3 far away from the middle unthreaded pipe section 2 is also provided with a pipe joint 4, and a plurality of assembling blocks 12 with inserting holes are arranged on the outer peripheral wall of the pipe joint 4 at equal intervals.

In order to ensure the stabilizing effect of the solid lubricant block in the lubricant groove 6, as shown in fig. 2, preferably, the bottom of the lubricant groove 6 is provided with a plurality of pins 7 uniformly distributed, and the solid lubricant block is tightly inserted on the pins 7.

In order to ensure that the thin-walled water pipe 13 rotates or moves relatively smoothly in the spiral steel pipe, as shown in fig. 3, preferably, an annular clamping groove 8 is coaxially arranged on the outer wall of the middle unthreaded pipe section 2, an oil storage groove 9 is arranged at the bottom of the annular clamping groove 8, an oil through hole 10 penetrating through the middle unthreaded pipe section 2 is arranged at the bottom of the oil storage groove 9, semisolid lubricating grease 2 is placed in the oil storage groove 9, and a sealing strip 11 for surrounding the annular clamping groove 8 to seal the notch of the oil storage groove 9 is further arranged on the middle unthreaded pipe section 2. Lubricating grease can continuously and slowly seep between the middle inner wall of the spiral steel pipe and the outer wall of the thin-wall water pipe 13 through the oil passing hole 10 with small aperture, and the subsequent maintenance rotation or the drawing of the thin-wall water pipe 13 can be smoother.

Specifically, the groove depth of the annular clamping groove 8 is 2-4mm, the oil storage groove 9 is a circular hole groove, and the diameter of the oil storage groove 9 is 7-9 mm.

Preferably, the sealing tape 11 is in a long strip shape, the middle section of the sealing tape 11 is a rubber strip 11a, both ends of the sealing tape 11 are textile fiber blocks 11b, wherein a fastening tape hair surface 11c is arranged on the textile fiber block 11b at one end, a fastening tape hook surface 11d is arranged on the textile fiber block 11b at the other end, and the fastening tape hook surface 11d is matched and bonded with the fastening tape hair surface 11 c.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A spiral steel pipe with self-lubricating pipe joint which characterized in that: the pipe joint comprises a first threaded pipe section (1), a middle unthreaded pipe section (2) and a second threaded pipe section (3) which are sequentially connected, wherein the outer peripheral walls of the first threaded pipe section (1) and the second threaded pipe section (3) are respectively provided with a threaded groove; the end, far away from middle unthreaded pipe section (2), of first threaded pipe section (1) is equipped with coupling (4), the outer end of coupling (4) is equipped with internal thread (5), internal thread (5) are gone up the stride and are equipped with along horizontal extension's lubrication groove (6), the extending direction of lubrication groove (6) is parallel with spiral steel pipe's axial, the groove depth of lubrication groove (6) on coupling (4) inner wall is greater than the degree of depth of internal thread (5), solid lubricant piece has been placed in lubrication groove (6).

2. A spiral steel pipe with a self-lubricating pipe joint as claimed in claim 1, wherein: the bottom of the lubricating groove (6) is provided with a plurality of uniformly distributed contact pins (7), and the solid lubricating block is tightly inserted into the contact pins (7).

3. Spiral steel pipe with self-lubricating pipe joint according to claim 1 or 2, characterized in that: coaxial ring groove (8) that is equipped with on the outer wall of middle unthreaded pipeline section (2), the tank bottom of ring groove (8) is equipped with oil storage tank (9), the tank bottom of oil storage tank (9) is equipped with crosses oilhole (10) of running through middle unthreaded pipeline section (2), semisolid lubricating grease has been placed in oil storage tank (9), still be equipped with on middle unthreaded pipeline section (2) and be used for encircleing ring groove (8) with sealing band (11) of sealed oil storage tank (9) notch.

4. A spiral steel pipe with a self-lubricating pipe joint as claimed in claim 3, wherein: the sealing strip (11) is in a long strip shape, the middle section of the sealing strip (11) is a rubber strip (11a), the two ends of the sealing strip (11) are textile fiber blocks (11b), one end of the sealing strip is provided with a fastening tape hair surface (11c) on the textile fiber block (11b), the other end of the sealing strip is provided with a fastening tape hook surface (11d) on the textile fiber block (11b), and the fastening tape hook surface (11d) is matched and bonded with the fastening tape hair surface (11 c).

5. A spiral steel pipe with a self-lubricating pipe joint as claimed in claim 3, wherein: the groove depth of the ring-shaped clamping groove (8) is 2-4mm, the oil storage groove (9) is a circular hole groove, and the diameter of the oil storage groove (9) is 7-9 mm.

6. A spiral steel pipe with a self-lubricating pipe joint as claimed in claim 1, wherein: and a plurality of assembling blocks (12) with jacks are arranged on the peripheral wall of the pipe joint (4) at equal intervals.