CN210475265U - Single-row type pipe expander - Google Patents

Abstract

The utility model relates to an expand tube machinery especially relates to a single row formula electric tube expander, which comprises a frame, be provided with in the frame and be used for pressing from both sides the double-layered pipe device of tightly waiting to expand tube, be used for treating the expand tube device that expand tube tip carried out the expand tube, simple structure, installation maintenance convenience, job stabilization nature are high.

Description

Single-row type pipe expander

Technical Field

The utility model relates to an expand tube machinery especially relates to a single row formula electric tube expander.

Background

The connection of the heat exchange tube and the tube plate mainly comprises expansion joint, welding, expansion welding and other methods, the expansion joint method can be divided into mechanical expansion joint, hydraulic expansion joint, rubber expansion joint, explosion expansion joint and other methods, the common methods at the present stage are mechanical expansion joint and hydraulic expansion joint, the hydraulic expansion joint has the characteristics of high stability and high working efficiency, but the hydraulic expansion joint has the characteristics of complex structure, large occupied space and troublesome maintenance, the tube expansion is carried out on the tube with thicker wall thickness through a hydraulic tube expander, the mechanical expansion joint is still widely selected for the tube with thinner wall thickness, the common method is to expand the end part of the tube firstly and then weld, and the connection stability is high.

The current single-row type electric tube expander mainly comprises a machine frame, be provided with in the frame and be used for pressing from both sides the double-layered pipe device of tight pipe expander, be used for treating the pipe expander that the pipe expander tip carried out the expand tube, like the portable electric tube expander that application number is 201821016421.3 discloses, can treat the pipe expander and carry out stable expand tube, however its installation adjustment is inconvenient, after the long-term work wearing and tearing of electric tube expander, inconvenient maintenance.

Disclosure of Invention

An object of the utility model is to overcome not enough among the prior art, provide a simple structure, installation and maintenance convenience, the high single-row formula electric tube expander of job stabilization nature.

The utility model discloses a realize through following technical scheme: a single-row type pipe expander comprises a rack, wherein a pipe clamping device for clamping a pipe to be expanded and a pipe expanding device for expanding the end part of the pipe to be expanded are arranged on the rack, the pipe clamping device comprises a plurality of groups of working clamping pieces arranged side by side outside the rack, a sliding sleeve for enabling the working clamping pieces to clamp the pipe to be expanded is sleeved outside any one group of working clamping pieces, a driving plate for simultaneously pushing each sliding sleeve to slide along the working clamping pieces is arranged on the rack, at least one end of the driving plate is connected with a pipe clamping driving device, the pipe expanding device comprises an expanding rod corresponding to the working clamping pieces, the expanding rod is connected with an expanding rod driving device for pushing the expanding rod to move and a guiding device for guiding the expanding rod, the rack comprises a rectangular bottom plate, two opposite side edges of the bottom plate are provided with upward supporting plates, and the two supporting plates are the same in shape, two backup pads pass through the bolt fastening on the bottom plate, expand the pole drive arrangement including setting up the drive roller between two backup pads, be provided with the driving tooth with the corresponding position department of expand bar on the drive roller, the expand bar sets up in the drive roller top, be provided with on the expand bar with driving tooth assorted driven rack, guider is including setting up the compression roller directly over the drive roller, be provided with the cross-section for curved annular slot with the corresponding position department of expand bar on the compression roller, the expand bar is the round pole, the diameter value of the cross-section place circle of slot is less than the diameter value of expand bar.

Further, there are two drive rollers, and two drive roller mounting height are the same, and the compression roller has two corresponding drive rollers.

Further, a hydraulic motor is connected to any one of the drive rollers.

Further, the drive teeth extend to both ends of the drive roller.

Further, be provided with ascending bedplate between two backup pads wherein one end, all through bolted connection between bedplate and bottom plate, the backup pad, be provided with the through-hole that is used for passing the expander roll with the corresponding position department of work clamping piece on the bedplate, arbitrary group work clamping piece encircles corresponding through-hole setting, the drive plate both ends all are connected with double-layered pipe drive arrangement, double-layered pipe drive arrangement is including setting up the actuating cylinder that drives at the backup pad lateral surface, the piston rod that drives actuating cylinder is fixed with the drive plate.

Furthermore, any group of working clamping pieces consists of three working clamping pieces, the inner wall of the outer end of each working clamping piece is provided with an arc-shaped clamping block for clamping a pipe to be expanded, and the section of a channel surrounded by the three clamping blocks of any group of working clamping pieces is circular.

The beneficial effects of the utility model reside in that: set up and press from both sides a tub device, expand the pipe device, will treat that the expand tube spare presss from both sides tight back, carry out the expand tube through the expand tube device, wherein the frame passes through bolted connection by panel, simple to operate, and the expander roll device is installed between two backup pads, and the adjustment is convenient, and job stabilization nature is high, and the diameter value of the cross-section place circle of slot is less than the diameter value of expander roll, can be stable lead to the expander roll, guarantee the machining precision.

Drawings

FIG. 1 is a schematic view of the structure of example 1;

FIG. 2 is a schematic view of the structure of the tube expansion device;

FIG. 3 is a schematic view of the connection between the sliding sleeve and the working jaw;

FIG. 4 is a schematic cross-sectional view of the connection between the work clamp and the seat plate;

FIG. 5 is a schematic view of a construction of a press roll;

FIG. 6 is a schematic cross-sectional view of a connecting column;

wherein: 1-bottom plate, 2-supporting plate, 3-seat plate, 4-pressing plate, 5-driving cylinder, 6-connecting column, 7-driving plate, 8-sliding sleeve, 9-working clamping piece, 10-hydraulic motor, 11-driving roller, 12-pressing roller, 13-groove, 14-guiding sleeve, 15-connecting plate, 16-clamping block, 17-copper sleeve, 18-bolt hole, 19-fixing ring, 20-through hole, 21-expansion rod, 22-stud and 23-threaded hole.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in figures 1-6, a single-row type pipe expander comprises a frame, a pipe clamping device for clamping a pipe to be expanded and a pipe expanding device for expanding the end part of the pipe to be expanded are arranged on the frame, the frame comprises a rectangular bottom plate 1, two opposite side edges of the bottom plate are provided with upward supporting plates 2, the two supporting plates are in the same shape and are fixed on the bottom plate through bolts, a base plate 3 is arranged between one end of each supporting plate, the base plate is connected with the bottom plate and the supporting plates through bolts, a connecting plate 15 is arranged between the other ends of the two supporting plates, the pipe clamping device comprises a plurality of groups of working clamping pieces which are arranged on the outer end surface of the base plate side by side, any group of working clamping pieces consists of three working clamping pieces 9, the working clamping pieces are made of spring steel and have higher elastic modulus and fatigue strength, a fixing ring 19 is fixed on the mounting end of the working clamping, bolt holes 18 are processed at corresponding positions on the seat plate and the pressure plate, the seat plate and the pressure plate are detachably fixed through bolts, a fixing ring is clamped between the seat plate and the pressure plate, a sliding sleeve 8 for enabling the working clamping piece to clamp a pipe to be expanded is sleeved outside any group of working clamping pieces, a driving plate 7 for simultaneously pushing each sliding sleeve to slide along the working clamping piece is installed on the rack, pipe clamping driving devices are connected to two ends of the driving plate, in the embodiment, the driving device is a driving air cylinder 5, a piston rod of the driving air cylinder is connected with the driving plate through a connecting column 6, a threaded hole is processed on the end face of the piston rod of the driving air cylinder, the connecting column is connected with the piston rod of the driving air cylinder through a stud 22, the connecting column is connected with the driving plate through a threaded hole 23 and a bolt, through holes 20 for penetrating through expansion rods 21, the inner wall of the outer end of each working clamping piece is integrally formed with an arc-shaped clamping block 16 for clamping a pipe to be expanded, and the section of a channel defined by the three clamping blocks of any group of the working clamping pieces is circular.

The pipe expanding device comprises an expanding rod corresponding to the working clamping piece, the expanding rod is connected with an expanding rod driving device used for pushing the expanding rod to move and a guiding device used for guiding the expanding rod, the expanding rod driving device comprises a driving roller 11 arranged between two supporting plates, driving teeth are processed on the driving roller at the position corresponding to the expanding rod, the driving teeth extend to two ends of the driving roller for processing conveniently, the expanding rod is arranged above the driving roller, a driven rack matched with the driving teeth is processed on the expanding rod, the guiding device comprises a pressing roller 12 arranged right above the driving roller, an annular groove 13 with an arc-shaped cross section is processed on the pressing roller at the position corresponding to the expanding rod, the expanding rod is a round rod, the diameter value of the circle with the cross section of the groove is 2-3mm smaller than that of the expanding rod, the expanding rod is guaranteed to move along the groove without swinging left and right, copper sleeves 17 are sleeved at two ends of the pressing roller, the pressing roller, when the friction between the expansion rod and the compression roller is too large, the compression roller can overcome the action of friction force and rotate, the damage is avoided, and the service life is prolonged.

The driving roller has two, and two driving roller mounting height are the same, and the compression roller has two corresponding driving rollers, guarantees that the expander roll is level and smooth, and arbitrary driving roller is connected with a hydraulic motor 10, and two hydraulic motor are servo motor or step motor, and two hydraulic motor synchronous motion can guarantee that single hydraulic motor load is little, improves life, can guarantee the expand tube job stabilization simultaneously.

The connecting plate is detachably connected with the supporting plate and the bottom plate through bolts, and a guide sleeve 14 used for guiding the expansion rod is installed on the outer end face of the connecting plate.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims (6)

1. The utility model provides a single row formula electric tube expander, includes the frame, be provided with in the frame and be used for pressing from both sides the double-layered pipe device of tight pipe expander, be used for treating the pipe expander device that the pipe expander tip carried out the expand tube, its characterized in that: the pipe clamping device comprises a plurality of groups of working clamping pieces which are arranged outside a rack side by side, a sliding sleeve for clamping the working clamping pieces to pipes to be expanded is sleeved outside any one group of working clamping pieces, a driving plate for pushing the sliding sleeves to slide along the working clamping pieces is arranged on the rack, at least one end of the driving plate is connected with a pipe clamping driving device, the pipe expanding device comprises an expanding rod corresponding to the working clamping pieces, the expanding rod is connected with an expanding rod driving device for pushing the expanding rod to move and a guiding device for guiding the expanding rod, the rack comprises a rectangular bottom plate, two opposite side edges of the bottom plate are provided with upward supporting plates, two supporting plates are the same in shape, the two supporting plates are fixed on the bottom plate through bolts, the expanding rod driving device comprises a driving roller arranged between the two supporting plates, and driving teeth are arranged on the driving roller and correspond to the expanding rod, the utility model discloses a drive roller, including drive roller, expander roll, drive roller, guide device, expander roll.

2. The single gang tube expander of claim 1, wherein: the drive roller has two, and two drive roller mounting height are the same, the compression roller has two corresponding drive rollers.

3. The single gang tube expander of claim 2, wherein: a hydraulic motor is connected to either drive roller.

4. The single gang tube expander of claim 1, wherein: the drive teeth extend to both ends of the drive roller.

5. The single gang tube expander of claim 1, wherein: the novel expansion rod clamping device is characterized in that an upward seat plate is arranged between one end of each of the two supporting plates, the seat plate is connected with the bottom plate and the supporting plates through bolts, through holes used for penetrating through expansion rods are formed in the positions, corresponding to the working clamping pieces, of the seat plate, any group of working clamping pieces are arranged around the corresponding through holes, the two ends of each driving plate are connected with a pipe clamping driving device, each pipe clamping driving device comprises a driving cylinder arranged on the outer side surface of the corresponding supporting plate, and a piston rod of each driving cylinder is fixed to the corresponding.

6. The single gang tube expander of claim 1, wherein: any one group of working clamping pieces consists of three working clamping pieces, the inner wall of the outer end of each working clamping piece is provided with an arc-shaped clamping block for clamping a pipe to be expanded, and the section of a channel surrounded by the three clamping blocks of any one group of working clamping pieces is circular.

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