Pipe wall thinning mechanism

Abstract

The utility model discloses a pipe wall thinning mechanism which comprises a core rod and a collecting pipe, the collecting pipe is arranged on the outer side wall of a target processing pipe in a sleeved mode and moves in a reciprocating mode, and the core rod moves in a reciprocating mode in a pipeline of the target processing pipe. The core rod comprises a first protrusion protruding out of the outer side wall of the core rod, and a second protrusion extending in the direction close to the core rod is arranged on the inner side wall of the collecting pipe. At the first position, the first bulge extends into the pipeline by a target distance, the second bulge is opposite to the lower part of the first bulge, the first bulge and the second bulge are spaced by a first gap distance, and the first gap distance is smaller than the initial wall thickness of a target to-be-treated pipe; and when the pipe wall processing mechanism moves from the first position to the second position, the pipe wall processing mechanism extends by the target distance according to the size of the first gap distance, so that the initial wall thickness of the target to-be-processed pipe in the target distance range is extruded to the first gap distance, and the pipe wall can be thinned to be smaller than the initial wall thickness; and individual requirements of customers are met.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipe processing technical field, and specifically relates to a pipe wall thinning mechanism. BACKGROUND

[0002] In various industrial fields, such as petroleum, natural gas, chemical industry, etc., the use of pipes is very extensive. The thickness of the pipe is an important factor affecting its performance and service life. In some fields, the wall thickness of the pipe is formed by cold upsetting process, but after cold upsetting, the wall thickness after cold upsetting is thicker than the initial material wall thickness, but in some applications, it may be necessary to thin the wall thickness of the pipe to meet specific performance requirements, such as reducing weight, changing the inner and outer diameter ratio, or improving the flow characteristics of the fluid. Therefore, how to thin the wall thickness of the pipe is an urgent matter to be solved. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the utility model is to provide a pipe wall thinning mechanism, which solves the problem that the wall thickness of the pipe obtained after cold upsetting cannot be thinned in the prior art.

[0004] The purpose of the utility model can be realized by the following technical scheme. The present application provides a pipe wall thinning mechanism, which comprises a thinning assembly, the thinning assembly comprises a core rod and a pipe collecting device, the pipe collecting device is sleeved outside the core rod, a gap is provided between the core rod and the pipe collecting device, the pipe collecting device and the core rod move relative to each other, the pipe collecting device is reciprocally moved on the outer sidewall of the target pipe to be processed, and the core rod is reciprocally moved in the pipe of the target pipe to be processed; the core rod comprises a first protrusion protruding from the outer sidewall of the core rod, and a second protrusion extends towards the core rod on the inner sidewall of the pipe collecting device; when the first position is reached, the first protrusion extends into the pipe by a target distance, the second protrusion is opposite to the first protrusion below, a first gap distance is provided between the first protrusion and the second protrusion, and the first gap distance is smaller than the initial wall thickness of the target pipe to be processed; when the pipe wall thinning mechanism moves from the first position to the second position, the pipe wall thinning mechanism expands the target distance by the size of the first gap distance, so that the initial wall thickness of the target pipe to be processed in the target distance range is extruded to the first gap distance.

[0005] In some embodiments, the thinning assembly further comprises a spring seat, a spring and a spring stop seat, the other end of the spring stop seat is connected with the pipe collecting device, the spring is arranged between the spring seat and the spring stop seat, and the spring seat and the spring stop seat are both sleeved on the core rod.

[0006] In some embodiments, the core rod further comprises a punch, the punch is arranged at one end away from the spring punch seat, and the first protrusion is arranged close to the punch.

[0007] In some embodiments, the thinning assembly further comprises a spring sliding part, the spring sliding part is sleeved outside the core rod, the spring punch seat and the spring stop seat are sleeved on the spring sliding part, and the spring stop seat is arranged to slide relative to the spring sliding part.

[0008] In some embodiments, the spring punch seat is provided with a mounting groove, and one end of the spring sliding part is embedded in the mounting groove.

[0009] In some embodiments, the length of the core rod is greater than the length of the spring sliding part.

[0010] In some embodiments, the pipe wall thinning mechanism further comprises a clamping piece for clamping and fixing the target pipe to be processed, and the clamping piece is arranged at one end of the thinning assembly opposite to the spring punch seat.

[0011] In some embodiments, the spring stop seat is provided with a stop part and a first step, the stop part protrudes from the outer wall of the spring stop seat, the first step is arranged to extend from the inner wall of the spring stop seat to the direction of the core rod, the spring sliding part is provided with a second step, the second step is arranged to protrude from the outer wall of the spring sliding part, the first step and the second step are matched with each other, and the spring stop seat reciprocally slides between the spring punch seat and the second step.

[0012] The utility model includes but is not limited to the following beneficial effects: (1) the application can carry out wall thickness thinning treatment to the pipe after cold upsetting to adapt to different wall thickness demand, (2) the application can control the thinning degree of pipe wall thickness by controlling the gap between core rod and pipe, thereby meeting different performance requirements, (3) the design of spring punch seat, spring and spring stop seat makes the pipe wall thinning mechanism have better stability during movement, the spring can provide stable restoring force, guarantees the relative position and movement state of core rod and pipe, thereby improving the stability of thinning process, (4) the design of clamping piece makes the operator conveniently fix and process target pipe, improves the convenience of operation. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description.

[0014] Figure 1 It is the structure schematic diagram of the pipe wall thinning mechanism of the utility model embodiment.

[0015] Figure 2 is a sectional view of the pipe wall thinning mechanism in one state of the embodiment of the utility model;

[0016] Figure 3 is a sectional view of the pipe wall thinning mechanism in another state (at the first position) of the embodiment of the utility model;

[0017] Figure 4 is a sectional view of the pipe wall thinning mechanism in another state of the embodiment of the utility model;

[0018] Figure 5 is Figure 3 is an enlarged view of I in the figure;

[0019] Figure 6 is a schematic view of the thinned pipe wall of the embodiment of the utility model;

[0020] In the figure, 1-core rod, 11-first protrusion, 12-punch, 2-pipe receiver, 21-second protrusion, 3-target pipe to be processed, 4-spring punch seat, 5-spring, 6-spring stop seat, 61-stop portion, 7-spring sliding portion, 8-clamping piece. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] The application provides a pipe wall thinning mechanism, which comprises a thinning assembly, specifically, as shown in Figures 1 to 5 the thinning assembly comprises a core rod 1 and a pipe receiver 2, the pipe receiver 2 is sleeved outside the core rod 1, a gap is arranged between the core rod 1 and the pipe receiver 2, the pipe receiver 2 and the core rod 1 move relative to each other, the pipe receiver 2 reciprocates on the outer sidewall of a target pipe to be processed, and the core rod 1 reciprocates in the pipeline of the target pipe to be processed; the core rod 1 comprises a first protrusion 11 protruding from the outer sidewall of the core rod 1, and a second protrusion 21 extends on the inner sidewall of the pipe receiver 2 towards the direction close to the core rod 1; specifically, as shown in Figure 3 the first protrusion 11 extends into the pipeline by a target distance when the first position, the second protrusion 21 is opposite to the lower side of the first protrusion 11, a first gap distance is arranged between the first protrusion 11 and the second protrusion 21, and the first gap distance is smaller than the initial wall thickness of the target pipe to be processed 3; when the pipe wall thinning mechanism moves from the first position to the second position, the pipe wall thinning mechanism extends by the size of the first gap distance by the target distance, so that the initial wall thickness of the target pipe to be processed 3 in the target distance range is extruded to the first gap distance.

[0023] In an example, the first protrusion 11 is an arc structure, and the second protrusion 21 is an arc structure. The first gap distance is the distance between the first top of the first protrusion 11 and the second top of the second protrusion 21. The application can perform wall thinning processing on the cold upset pipe to adapt to different wall thickness requirements, and can control the thinning degree of the pipe wall by controlling the gap between the core rod 1 and the pipe receiving part 2, thereby meeting different performance requirements.

[0024] In some embodiments, the thinning assembly further comprises a spring seat 4, a spring 5, and a spring stop seat 6, the other end of the spring stop seat 6 is connected with the pipe receiving part 2, the spring 5 is arranged between the spring seat 4 and the spring stop seat 6, and the spring seat 4 and the spring stop seat 6 are both sleeved on the core rod 1. Specifically, at the first position, the spring 5 is in a compressed state. It can be understood that the design of the spring seat 4, the spring 5, and the spring stop seat 6 makes the pipe wall thinning mechanism have better stability during movement, and the spring 5 can provide stable restoring force to ensure the relative position and movement state of the core rod 1 and the pipe receiving part 2, thereby improving the stability of the thinning process.

[0025] In some embodiments, the core rod 1 further comprises a punch 12, the punch 12 is arranged at an end away from the spring seat 4, and the first protrusion 11 is arranged close to the punch 12.

[0026] In some embodiments, the thinning assembly further comprises a spring sliding part 7, the spring sliding part 7 is sleeved on the outside of the core rod 1, the spring seat 4 and the spring stop seat 6 are sleeved on the spring sliding part 7, and the spring stop seat 6 is arranged in sliding mode relative to the spring sliding part 7.

[0027] In some embodiments, the spring seat 4 is provided with a mounting groove, and one end of the spring sliding part 7 is embedded in the mounting groove.

[0028] In some embodiments, the length of the core rod 1 is greater than the length of the spring sliding part 7.

[0029] In some embodiments, the pipe wall thinning mechanism further comprises a clamping piece 8 for clamping and fixing the target pipe 3 to be processed, and the clamping piece 8 is arranged at an end opposite to the spring seat 4 of the thinning assembly.

[0030] In some embodiments, the spring stop seat 6 is provided with a stop part 61 and a first step, the stop part 61 protrudes from the outer side wall of the spring stop seat 6, and the first step is arranged in extension from the inner side wall of the spring stop seat 6 to the direction of the core rod 1, the spring sliding part 7 is provided with a second step, the second step is arranged in protrusion from the outer side wall of the spring sliding part 7, the first step and the second step cooperate with each other, and the spring stop seat 6 reciprocally slides between the spring seat 4 and the second step.

[0031] The following will be described in combination with Figures 2 to 4The working principle of the pipe wall thinning mechanism in this application is described below:

[0032] Specifically, such as Figure 2 As shown, the receiving tube 2 is to the right ( Figure 2 The core rod 1 moves to the vicinity of the clamping member 8 or to contact the clamping member 8. At this time, the spring returns to its original position, and the core rod 1 enters a small portion of the target tube 3. The first protrusion 11 and the second protrusion 21 are misaligned. Further, the core rod 1 continues to move to the right until... Figure 2 At this position, one end of the core rod 1 extends into a large portion of the target tube 3 to be processed, and the retractor 2 is correspondingly sleeved on the outer wall of the target tube 3 to be processed. At this time, the second protrusion 21 is located directly below the first protrusion 11, and the gap between the first protrusion 11 and the second protrusion 21 is less than the initial wall thickness of the target tube 3 to be processed. Subsequently, the thinning component is driven by the driving component to move from the first position to the second position, that is, the thinning component moves to the left, moving to... Figure 3 During the movement of the thinning component from the first position to the second position, because the first gap distance is smaller than the initial wall thickness of the target tube 3, the first protrusion 11 and the second protrusion 21 compress the target tube 3 during the movement of the thinning component to the second position, causing the initial wall thickness to be compressed and extended to match the first gap distance. Furthermore, the thinned target tube 3... Figure 6 As shown, the wall thickness on the left side is less than that on the right side.

[0033] This utility model includes, but is not limited to, the following beneficial effects: (1) This application can perform wall thickness reduction treatment on pipes after cold heading to adapt to different wall thickness requirements; (2) This application can control the degree of pipe wall thickness reduction by controlling the gap between the core rod 1 and the tube take-up 2, thereby meeting different performance requirements; (3) The design of the spring punch 4, the spring and the spring stop 6 makes the pipe wall thinning mechanism have better stability during the movement. The spring can provide a stable restoring force to ensure the relative position and movement state of the core rod 1 and the tube take-up 2, thereby improving the stability of the thinning process; (4) The design of the clamping part 8 makes it easy for operators to fix and handle the target pipe, improving the convenience of operation.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A tube wall thinning mechanism characterized by, The pipe wall thinning mechanism comprises a thinning assembly, the thinning assembly comprises a core rod (1) and a collecting pipe (2), the collecting pipe (2) is sleeved outside the core rod (1), a gap is arranged between the core rod (1) and the collecting pipe (2), the collecting pipe (2) and the core rod (1) are relatively moved, the collecting pipe (2) reciprocates on the outer sidewall of a target pipe (3) to be processed, and the core rod (1) reciprocates in the pipe of the target pipe (3) to be processed.

2. The tube wall thinning mechanism according to claim 1, characterized by, The core rod (1) comprises a first protrusion (11) protruding from the outer sidewall of the core rod (1), and a second protrusion (21) extending towards the core rod (1) on the inner sidewall of the collecting pipe (2); when the first position is reached, the first protrusion (11) extends into the pipe by a target distance, the second protrusion (21) is opposite to the first protrusion (11) below, a first gap distance is arranged between the first protrusion (11) and the second protrusion (21), and the first gap distance is smaller than the initial wall thickness of the target pipe (3) to be processed; when the pipe wall thinning mechanism moves from the first position to a second position, the pipe wall thinning mechanism expands the target distance by the size of the first gap distance, so that the initial wall thickness of the target pipe (3) to be processed in the target distance range is extruded to the first gap distance.

3. The tube wall thinning mechanism of claim 2, wherein The thinning assembly further comprises a spring impact seat (4), a spring (5) and a spring stop seat (6), one end of the spring stop seat (6) is connected with the collecting pipe (2), the spring (5) is arranged between the spring impact seat (4) and the spring stop seat (6), and the spring impact seat (4) and the spring stop seat (6) are sleeved on the core rod (1).

4. The tube wall thinning mechanism of claim 2, wherein The core rod (1) further comprises a punch (12), the punch (12) is arranged at one end away from the spring impact seat (4), and the first protrusion (11) is arranged close to the punch (12).

5. The tube wall thinning mechanism of claim 4, wherein, The thinning assembly further comprises a spring sliding part (7), the spring sliding part (7) is sleeved outside the core rod (1), the spring impact seat (4) and the spring stop seat (6) are sleeved on the spring sliding part (7), and the spring stop seat (6) is arranged in sliding mode relative to the spring sliding part (7).

6. The tube wall thinning mechanism of claim 4, wherein An installation groove is formed in the spring impact seat (4), and one end of the spring sliding part (7) is embedded in the installation groove.

7. The tube wall thinning mechanism of claim 2, wherein The length of the core rod (1) is greater than the length of the spring sliding part (7). The pipe wall thinning mechanism further comprises a clamping piece (8), the clamping piece (8) is used for clamping and fixing the target pipe (3) to be processed, and the clamping piece (8) is arranged at one end opposite to the spring impact seat (4) of the thinning assembly.

8. The tube wall thinning mechanism of claim 4, wherein, The spring stop seat (6) is provided with a stop portion (61) and a first step, the stop portion (61) protrudes from the outer side wall of the spring stop seat (6), the first step is arranged from the inner side wall of the spring stop seat (6) to the direction of the core rod (1), the spring sliding portion (7) is provided with a second step, the second step is arranged protruding from the outer side wall of the spring sliding portion (7), the first step and the second step are matched with each other, and the spring stop seat (6) reciprocally slides between the spring seat (4) and the second step.

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