Hydraulic pipe expander for steel pipe machining

Abstract

The utility model discloses a hydraulic tube expander for steel tube processing, which relates to the technical field of steel tube processing and comprises a tube expander head and a frame, a flaring die is arranged in the tube expander head, a radial positioning seat is arranged at the front end of the tube expander head corresponding to the flaring die, and a steel tube supporting mechanism is arranged at the front end of the frame. The supporting height of the steel pipe supporting mechanism to the steel pipe is adjustable, the radial positioning seat comprises an outer sheath and a radial positioning wheel, and the steel pipe supporting mechanism comprises a supporting roller frame, a sliding groove frame and a height adjusting frame arranged on the sliding groove frame in a sliding mode. By arranging the radial positioning seat and the steel pipe supporting mechanism, supporting and auxiliary positioning are carried out on the outer side of the flaring end of the steel pipe through the radial positioning seat, the steel pipe supporting mechanism is adjusted to a proper material supporting height, operation is more convenient, large pipe fitting flaring is more stable, and the steel pipe flaring device is suitable for machining steel pipes with different pipe diameters; the problem that when a pipe expander conducts flaring machining on a steel pipe, auxiliary supporting and positioning are lacked is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing, and particularly relates to a hydraulic tube expanding machine for steel pipe processing. Background Art

[0002] A tube expanding machine is a device that applies a certain force to an expander through a hydraulic method to increase the diameter and expand the opening of a steel pipe, also known as a flaring machine. Steel pipe flaring is widely used in steel pipe connection and repair work in fields such as petroleum, natural gas, chemical industry, water treatment, and construction.

[0003] When in use, the tube expanding machine presses an expanding die into one end of the steel pipe to expand the opening. The expanding die specifically includes a cone and an outer surface component of the tube expander head. The outer surface component of the tube expander head is arranged on the outer circumference of the cone. The cone is axially pulled by a hydraulic cylinder. Thus, under the wedge action between the cone and the outer surface component of the tube expander head, the outer surface component of the tube expander head expands radially, and the steel pipe arranged on the outer circumference of the outer surface component of the tube expander head is expanded. After the flaring is completed, the steel pipe can be taken out.

[0004] Since the force exerted by the outer surface component of the tube expander head on the steel pipe flaring is radial, it is relatively easy to operate for steel pipes with small diameters and short lengths. During operation, the steel pipe is generally held steadily on the expanding die by hand; however, when flaring steel pipes with larger diameters and longer lengths, it is inconvenient to operate only by hand, and the adaptability is not high when assisted by an ordinary support frame, which is not conducive to the stable positioning of the steel pipe. Therefore, we provide a hydraulic tube expanding machine for steel pipe processing, which locally improves the existing hydraulic tube expanding machine and can assist in supporting during steel pipe flaring to achieve the positioning of the steel pipe. Content of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic tube expanding machine for steel pipe processing, which solves the problem of the lack of auxiliary support and positioning during the steel pipe flaring processing of the tube expanding machine.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A hydraulic tube expanding machine for steel pipe processing includes a tube expanding machine head and a frame. An expanding die is arranged inside the tube expanding machine head. A radial positioning seat is arranged at the front end of the tube expanding machine head corresponding to the expanding die. A steel pipe support mechanism is arranged at the front end of the frame, and the support height of the steel pipe support mechanism for the steel pipe is adjustable;

[0007] The radial positioning seat includes an outer sheath and a radial positioning wheel. The outer sheath is fixed at the front end of the tube expanding machine head, and the outer sheath is sleeved on the outer circumference of the expanding die. One end of the positioning wheel of the radial positioning wheel is located inside the outer sheath and corresponds to the expanding die along the radial direction of the outer sheath. The movable rod of the radial positioning wheel is slidably connected along the radial direction of the outer sheath, and the sliding of the movable rod of the radial positioning wheel is elastically supported by the spring support of the radial positioning wheel;

[0008] The steel pipe support mechanism includes a support roller frame, a chute frame, and a height adjustment frame slidably disposed on the chute frame. The chute frame is fixed to the front end of the machine frame. The chute of the chute frame is arranged along the direction parallel to the steel pipe. The support roller frame supports the steel pipe through rollers, and the support roller frame is fixed on the height adjustment frame.

[0009] Preferably, the spring of the spring support is sleeved on the movable rod. The bracket of the spring support is fixed outside the outer sheath, and both ends of the spring are respectively restricted between the movable rod and the bracket.

[0010] Preferably, the radial positioning wheels are circumferentially spaced on the outer sheath, and the positioning wheels contact the outer peripheral surface of the steel pipe and rotate along the direction of the steel pipe towards the flaring die.

[0011] Preferably, the height adjustment frame includes a cross plate, a movable screw rod, and a screw rod ejector. The cross plate is erected on the chute frame and slidably arranged along the chute. The movable screw rod penetrates the cross plate, and a nut is connected below the cross plate on the movable screw rod. The top of the screw rod fixes the support roller frame above the cross plate. The screw rod ejector is threadedly connected to the cross plate, and the top of the screw rod ejector abuts against the bottom of the support roller frame.

[0012] Preferably, the rollers of the support roller frame are arranged along the direction perpendicular to the steel pipe.

[0013] The utility model has the following beneficial effects:

[0014] By setting the radial positioning seat and the steel pipe support mechanism, the utility model supports and assists in positioning on the outside of the flared end of the steel pipe through the radial positioning seat, and adjusts to a suitable material supporting height through the steel pipe support mechanism to lift the rear end or the waist of the steel pipe, facilitating the flared end and the tail end of the steel pipe to be on the same horizontal line. The support at the two positions replaces manual holding of the steel pipe steady on the flaring die, making the operation more convenient, the flaring of large pipe fittings more stable, and adapting to the processing of steel pipes with different diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the utility model;

[0016] Figure 2 is a schematic structural view of the utility model at the position of the tube expanding head;

[0017] Figure 3 is an assembly drawing of the tube expanding head and the steel pipe of the utility model.

[0018] In the figure: 1. Tube expanding head; 11. Flaring die; 2. Machine frame; 3. Radial positioning seat; 31. Outer sheath; 32. Radial positioning wheel; 321. Positioning wheel; 322. Movable rod; 323. Spring support; 4. Steel pipe support mechanism; 41. Support roller frame; 42. Chute frame; 43. Height adjustment frame. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0020] As Figures 1-3 shown, the present utility model provides a technical solution: a hydraulic tube expanding machine for steel pipe processing, including a tube expanding head 1 and a frame 2. An expanding die 11 is arranged inside the tube expanding head 1, and the expanding die 11 includes a cone and an outer surface component of the tube expanding head. A radial positioning seat 3 is arranged at the front end of the tube expanding head 1 corresponding to the expanding die 11 to position the expanding end of the steel pipe. When the steel pipe is expanded by internal force, the radial positioning seat 3 plays a role of auxiliary support and positioning on the outer side of the steel pipe. A steel pipe support mechanism 4 is arranged at the front end of the frame 2 to lift the steel pipe to support the tail end or the waist of the steel pipe, facilitating the processing end and the tail end of the steel pipe to be on the same horizontal line. Since the diameters of steel pipes in different batches are different, the support height of the steel pipe support mechanism 4 for the steel pipe is adjustable to adapt to the material support of steel pipes with different diameters.

[0021] The radial positioning seat 3 includes an outer sheath 31 and radial positioning wheels 32. The outer wall of the outer sheath 31 is hexagonal for facilitating the fixed installation of the radial positioning wheels 32, and the inner wall is circular. The outer sheath 31 is fixed at the front end of the tube expanding head 1, and the outer sheath 31 is sleeved on the outer periphery of the expanding die 11. The radial positioning wheels 32 are circumferentially spaced on the outer sheath 31. One end of the positioning wheel 321 of the radial positioning wheel 32 is located inside the outer sheath 31 and radially corresponds to the expanding die 11 to play a role of radial support. When supporting, the positioning wheel 321 contacts the outer peripheral surface of the steel pipe and rotates along the direction of the steel pipe towards the expanding die 11. The movable rod 322 of the radial positioning wheel 32 slides radially along the outer sheath 31 as the steel pipe extends to adapt to the support of the steel pipe diameter. The sliding of the movable rod 322 of the radial positioning wheel 32 is elastically supported by the spring bracket 323 of the radial positioning wheel 32. The spring of the spring bracket 323 is sleeved on the movable rod 322, and the bracket of the spring bracket 323 is fixed outside the outer sheath 31. The two ends of the spring are respectively restricted between the movable rod 322 and the bracket, that is, the spring elastically expands and contracts synchronously with the sliding of the movable rod 322. The auxiliary support of the radial positioning wheel 32 on the outer side of the steel pipe is elastic support.

[0022] The steel pipe support mechanism 4 includes a support roller frame 41, a chute frame 42, and a height adjustment frame 43 slidably disposed on the chute frame 42. The chute frame 42 is fixed to the front end of the frame 2, and the chute of the chute frame 42 is arranged along the direction parallel to the steel pipe. The support roller frame 41 supports the steel pipe through rollers, and the rollers of the support roller frame 41 are arranged along the direction perpendicular to the steel pipe, and the support roller frame 41 is fixed on the height adjustment frame 43;

[0023] The height adjustment frame 43 includes a cross plate, a movable screw rod, and a screw rod ejector. The cross plate is erected on the chute frame 42 and slidably arranged along the chute to adjust the distance between the support roller frame 41 and the tube expanding head 1. The movable screw rod penetrates through the cross plate, and a nut is connected below the cross plate on the movable screw rod. The top of the screw rod fixes the support roller frame 41 above the cross plate. The screw rod ejector is threadedly connected to the cross plate, and the top of the screw rod ejector abuts against the bottom of the support roller frame 41. During height adjustment, adjust the height of the nut on the screw rod downward along the screw rod, and then turn the screw rod ejector upward to push the support roller frame 41 to the height limited by the nut, and the height adjustment of the support roller frame 41 can be completed.

[0024] It should be noted that in this article, terms such as "including", "comprising", or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article, or device.

[0025] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic tube expander for steel tube processing, comprising a tube expander head (1) and a frame (2), wherein an expansion die (11) is arranged in the tube expander head (1), characterized in that: A radial positioning seat (3) is arranged at the front end of the tube expander head (1) corresponding to the expanding die (11), and a steel pipe supporting mechanism (4) is arranged at the front end of the frame (2), wherein the support height of the steel pipe supporting mechanism (4) for the steel pipe is adjustable; The radial positioning seat (3) comprises an outer sleeve (31) and a radial positioning wheel (32); the outer sleeve (31) is fixed to the front end of the tube expander head (1), and the outer sleeve (31) is sleeved on the outer circumference of the expansion die (11); one end of the positioning wheel (321) of the radial positioning wheel (32) is located inside the outer sleeve (31) and corresponds to the expansion die (11) along the radial direction of the outer sleeve (31); the movable rod (322) of the radial positioning wheel (32) is slidably connected along the radial direction of the outer sleeve (31), and the sliding of the movable rod (322) of the radial positioning wheel (32) is elastically supported by a spring bracket (323) of the radial positioning wheel (32); The steel pipe support mechanism (4) comprises a support roller frame (41), a slide groove frame (42), and a height adjustment frame (43) slidably arranged on the slide groove frame (42); the slide groove frame (42) is fixed to the front end of the frame (2); the slide groove of the slide groove frame (42) is arranged in a direction parallel to the steel pipe; the support roller frame (41) supports the steel pipe through rollers, and the support roller frame (41) is fixed to the height adjustment frame (43).

2. A hydraulic tube expander for steel tube processing according to claim 1, characterized in that: The spring of the spring bracket (323) is sleeved on the movable rod (322), the bracket of the spring bracket (323) is fixed on the outside of the outer sheath (31), and the two ends of the spring are respectively restricted between the movable rod (322) and the bracket.

3. The hydraulic tube expander for steel tube processing according to claim 1, characterized in that: The radial positioning wheels (32) are distributed at circumferential intervals on the outer sleeve (31), and the positioning wheels (321) contact the outer circumferential surface of the steel pipe and rotate along the direction of the steel pipe toward the expanding die (11).

4. The hydraulic tube expander for steel tube processing according to claim 1, characterized in that: The height adjustment frame (43) comprises a transverse plate, a movable screw and a screw top rod, the transverse plate is mounted on the slide slot frame (42) and is slidably arranged along the slide slot, the movable screw passes through the transverse plate, a nut is connected to the movable screw below the transverse plate, and the top of the screw is fixed to the support roller frame (41) above the transverse plate, the screw top rod is threadedly connected to the transverse plate, and the top of the screw top rod is pressed against the bottom of the support roller frame (41).

5. The hydraulic tube expander for steel tube processing according to claim 1, characterized in that: The rollers of the supporting roller frame (41) are arranged in a direction perpendicular to the steel pipe.

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