CN214639719U

CN214639719U - Hydraulic pipe expanding machine

Info

Publication number: CN214639719U
Application number: CN202023124769.4U
Authority: CN
Inventors: 孙秋林
Original assignee: Shanxi Qinghui Shengkai Technology Co ltd
Current assignee: Shanxi Qinghui Shengkai Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-11-09
Anticipated expiration: 2030-12-22

Abstract

The utility model provides a hydraulic pipe expander, belonging to the technical field of pipe expanders; the purpose is to solve the problem that the middle part of a workpiece can not be expanded at present; the technical scheme is that the hydraulic cylinder comprises a cylinder body and a piston, wherein a hollow bulge is arranged at the front end of the cylinder body, a limiting hole is formed in the inner side of the front end of the bulge, a T-shaped guide sleeve is arranged in the limiting hole, a spring sleeve capable of expanding along the radial direction is arranged at one end, away from the cylinder body, of the guide sleeve, a nut is arranged on the outer side of the guide sleeve, the nut is in threaded connection with the outer side of the bulge, a push rod is movably connected in the guide sleeve, the front end of the push rod is provided with a taper, the rear end of the push rod is connected with the piston, and the length range of the push rod extending out of the nut is 130-160 mm; the technical effect does, the utility model discloses simple structure can satisfy the demand of the pipe that rises to the work piece mid portion to it is not high to the machining precision requirement, convenient processing also satisfies the intensity requirement simultaneously, has enlarged application range.

Description

Hydraulic pipe expanding machine

Technical Field

The utility model belongs to the technical field of the pipe expander, specifically be a hydraulic pressure pipe expander.

Background

The pipe expanding machine is characterized in that a taper is arranged at one end of a push rod of the pipe expanding machine, an expanding head capable of expanding along the radial direction is arranged at the outer side of the end with the taper of the push rod, a tapered hole matched with the push rod is arranged at the inner side of the expanding head, the push rod moves back and forth under the driving of external force to push the expanding head open, so that the inner diameter of a workpiece sleeved on the expanding head is enlarged, but the existing hydraulic pipe expanding machine can only expand a pipe on a part of the workpiece close to the end part and cannot meet the pipe expanding requirement on the middle part of the workpiece, if the existing hydraulic pipe expanding machine needs to expand the pipe on the middle part of the workpiece, the push rod needs to be lengthened, on one hand, the requirement on the machining precision of the push rod is high, the machining is difficult, on the other hand, the strength of the push rod is low, and the push rod is easy to damage.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes prior art's is not enough, provides a hydraulic pressure pipe expander, and the purpose is solved and is unable to expand the problem of pipe to the work piece mid portion at present, enlarges the range of application of pipe expander.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A hydraulic pipe expander comprises a cylinder body, a cylinder cover, a piston and an ejector rod, wherein the cylinder cover, the piston and the ejector rod are arranged at the rear end of the cylinder body, the piston is arranged in the cylinder body and can move horizontally along the cylinder body, the piston divides the cylinder body into a first cavity and a second cavity, the pipe expander further comprises an operating handle, the operating handle is detachably connected with the cylinder cover, an oil inlet channel is arranged on the operating handle and the cylinder cover in a communicated manner, the oil inlet channel is communicated with the first cavity, an oil return channel is arranged on the cylinder body in a vertical direction of the oil inlet channel, the oil return channel is communicated with the second cavity, a hollow bulge is arranged at the front end of the cylinder body, a boss is arranged at the front end of the piston, the boss extends to the hollow bulge, a limit hole is formed in the inner side of the front end of the bulge, and a T-shaped guide sleeve is arranged in the limit hole, the front end of uide bushing is provided with can be along radial expanding spring housing, the outside of uide bushing is provided with the nut, the nut with bellied outside threaded connection is in the same place, swing joint has in the uide bushing the ejector pin, the front end of ejector pin is provided with the tapering, and the rear end is connected with the piston, the inboard of spring housing be provided with the taper hole that the tapering suits, the ejector pin stretches out the length scope of nut is 130mm-160mm, be provided with the switch on the operating handle, the oil feed passageway with oil return passageway all is connected with the hydraulic pressure station through oil pipe, the oil feed passageway with oil return passageway all is provided with the solenoid valve.

Further, the operating handle is connected with the cylinder cover through a bolt.

The utility model discloses produced beneficial effect does for prior art, the utility model discloses simple structure can satisfy the demand of the pipe that rises to the work piece mid portion to it is not high to the machining precision requirement, convenient processing also satisfies the intensity requirement simultaneously, has enlarged application range.

Drawings

The present invention will be further explained with reference to the accompanying drawings;

fig. 1 is a schematic perspective view of a hydraulic pipe expander of the present invention;

fig. 2 is a schematic front view of the hydraulic pipe expander of the present invention;

FIG. 3 is a schematic sectional view A-A of FIG. 2;

wherein, 1 is the uide bushing, 2 is the nut, 3 is operating handle, 4 is the cylinder body, 5 is the cylinder cap, 6 is the ejector pin, 7 is the piston, 8 is the oil feed passageway, 9 is the oil return passageway, 10 is the switch, 11 is the spring housing.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. 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 solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

In the embodiment, as shown in fig. 1-3, the hydraulic pipe expander of the present invention comprises a cylinder body, a cylinder cover 5, a piston 7, a push rod 6, wherein the cylinder cover 5 is located at the rear end of the cylinder body and is connected with the cylinder body through a bolt, the piston 7 is disposed in the cylinder body and can horizontally move along the front and back of the cylinder body, the cylinder body is divided into a first chamber and a second chamber by the piston 7, the pipe expander further comprises an operating handle 3, the operating handle 3 is connected with the cylinder cover 5 through a bolt, an oil inlet channel 8 is disposed on the operating handle 3 and the cylinder cover 5 in a communicating manner, the oil inlet channel 8 is communicated with the first chamber, an oil return channel 9 is disposed on the cylinder body in a direction perpendicular to the oil inlet channel 8, the oil return channel 9 is communicated with the second chamber, a hollow protrusion is disposed at the front end of the cylinder body, a boss is disposed at the front end of the piston 7, the boss extends to the hollow portion of the protrusion, a limiting hole is disposed at the inner side of the front end of the protrusion, the T-shaped guide sleeve 1 is arranged in the limiting hole, a spring sleeve 11 capable of expanding along the radial direction is arranged at one end, away from the cylinder body, of the guide sleeve 1, a nut is arranged on the outer side of the guide sleeve 1 and is in threaded connection with the outer side of the protrusion, a push rod 6 is movably connected in the guide sleeve 1, the front end of the push rod 6 is provided with a taper, the rear end of the push rod 6 is connected with a piston 7, a tapered hole matched with the taper of the push rod 6 is formed in the inner side of the spring sleeve 11, a switch 10 is arranged on the operating handle 3, the oil inlet channel 8 and the oil return channel 9 are both connected with a hydraulic station (not shown in the figure) through oil pipes, electromagnetic valves are arranged on the oil inlet channel 8 and the oil return channel 9, and are electrically connected with the switch 10.

In this embodiment, the total length from the front end of the spring housing 11 to the rear end of the operating handle 3 is 469.1mm, the length from the front end of the spring housing 11 to the rear end of the leakage portion of the cylinder head 5 is 269.1mm, the length of the tapered portion of the front end of the lift pin 6 is 20.5mm, the diameter of the lift pin 6 is 8mm, the diameter of the guide sleeve 1 is 12mm, the diameter of the nut 2 is 64mm, the diameter of the cylinder 4 is 96mm, the diameter of the piston 7 is 70mm, and the length of the lift pin 6 extending out of the nut is 135 mm.

The working process is that the pipe expanding machine is inserted into a workpiece, a switch 10 on the pipe expanding machine is opened, an electromagnetic valve on an oil inlet channel 8 is opened, hydraulic oil is contacted with the end part of a piston 7 through the oil inlet channel 8, the hydraulic oil pushes the piston 7 to move forwards along with the increase of pressure, the piston 7 pushes a mandril 6 to move forwards, a spring sleeve 11 on the front section of a guide sleeve 1 is pushed open by utilizing a taper surface on the front section of the mandril 6 when the mandril 6 is pushed out, the diameter direction of the spring expanding sleeve can be changed by 0.3mm-0.6mm, so that the workpiece generates plastic deformation, the workpiece and parts sleeved outside the workpiece are tightly connected together in an interference fit manner and can not fall off, when the middle part of the workpiece needs to be subjected to pipe expanding, the working process can be repeated only by extending the pipe expanding machine to the position needing to expand the pipe, the pipe expanding machine of the utility model is provided with the guide sleeve 1, the guide sleeve 1 is connected with the cylinder body through the nut, so that the strength of the ejector rod 6 is guaranteed, the guide function of the guide sleeve 1 is achieved, the requirement on the precision of the ejector rod 6 is low, machining is convenient, the length range of the ejector rod 6 extending out of the nut is 130mm-160mm, the requirement of a conventional pipeline on pipe expansion of the middle part can be met, pipe expansion can be conducted on the end part of the pipeline, and the application range of the pipe expansion machine is expanded.

The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.

Claims

1. A hydraulic pipe expander comprises a cylinder body, a cylinder cover, a piston and an ejector rod, wherein the cylinder cover, the piston and the ejector rod are arranged at the rear end of the cylinder body, the piston is arranged in the cylinder body and can be horizontally moved along the cylinder body, the piston divides the cylinder body into a first cavity and a second cavity, the hydraulic pipe expander is characterized by further comprising an operating handle, the operating handle is detachably connected with the cylinder cover, an oil inlet channel is arranged on the operating handle and the cylinder cover in a communicated manner, the oil inlet channel is communicated with the first cavity, an oil return channel is arranged on the cylinder body in a vertical direction of the oil inlet channel, the oil return channel is communicated with the second cavity, a hollow bulge is arranged at the front end of the cylinder body, a boss is arranged at the front end of the piston, the boss extends to the hollow part of the bulge, and a limit hole is arranged on the inner side of the front end of the bulge, the limiting hole is internally provided with a T-shaped guide sleeve, the front end of the guide sleeve is provided with a spring sleeve capable of expanding along the radial direction, the outer side of the guide sleeve is provided with a nut, the nut is connected with the outer side of the protrusion in a threaded manner, the guide sleeve is internally and movably connected with an ejector rod, the front end of the ejector rod is provided with a taper, the rear end of the ejector rod is connected with a piston, the inner side of the spring sleeve is provided with a taper hole matched with the taper, the length range of the ejector rod extending out of the nut is 130mm-160mm, the operating handle is provided with a switch, the oil inlet channel is connected with the oil return channel through an oil pipe and a hydraulic station, and the oil inlet channel is provided with an electromagnetic valve.

2. The hydraulic pipe expander according to claim 1, wherein the operating handle and the cylinder head are bolted together.