CN212760740U - Hydraulic pipe expanding device - Google Patents

Abstract

The utility model provides a hydraulic pressure expand tube device. The utility model provides a hydraulic pressure expand tube device, wherein, includes hydro-cylinder, fixing base, guide pin bushing and expand tube part, expand tube part includes toper top core and establishes two at least toper sliders on the toper top core circumference outer wall, the hydro-cylinder passes through hydro-cylinder pull rod fixed connection in fixing base one end, the guide pin bushing with fixing base other end fixed connection, the microcephaly end of toper top core passes the guide pin bushing stretches into inside the fixing base with the hydro-cylinder hub connection, the toper slider is close to the one end of toper top core microcephaly end stretches into in the guide pin bushing and with the guide pin bushing passes through elastic component and guide part and is connected. The utility model discloses can frequently carry out the expand tube processing, long service life does not need often to change the part, has improved production efficiency, and use cost is low.

Description

Hydraulic pipe expanding device

Technical Field

The utility model relates to a hydraulic pressure expand tube technical field, more specifically relates to a hydraulic pressure expand tube device.

Background

The lining plastic and plastic coated steel pipe needs to be pressed at the port when adopting the clamp connection, the inner lining or the inner coating can generate the separation phenomenon when pressing the groove to influence the product performance and the appearance, the pressing groove can eliminate the phenomenon after the stainless steel sleeve is arranged on the pipe orifice, and the pipe orifice needs to be expanded by a pipe expander to enable the stainless steel sleeve to be attached to the plastic layer before the stainless steel sleeve pressing groove is arranged on the pipe orifice to prevent the sliding and loosening when the pressing groove is formed. The existing liquid bag type hydraulic tube expander adopts pressure oil to be directly pressed into an elastic rubber cavity so as to enable the outer diameter of the elastic rubber to be expanded and expand a stainless steel sleeve to be attached to the inner wall of a steel-plastic tube, so that the elastic rubber is easy to age and lose efficacy in the using process and needs to be frequently replaced, and meanwhile, due to different specifications of processed steel tubes, spare parts of the elastic rubber with various specifications are needed, so that the production efficiency is low and the cost is high; when the liquid bag type hydraulic pipe expander is used for processing, pressure fluctuation is unstable, the influence on the production process is large, oil leakage can be generated due to overhigh pressure, the next process is influenced, and the hydraulic pipe expander cannot expand tightly due to insufficient pressure.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome current liquid pocket type hydraulic pressure expand tube and need frequently change the elasticity and glue, the pressure oscillation influences the shortcoming of production process, provides a hydraulic pressure type expand tube device. The utility model discloses can frequently carry out the expand tube processing, long service life does not need often to change the part, has improved production efficiency, and use cost is low.

In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a hydraulic pressure expand tube device, wherein, includes hydro-cylinder, fixing base, guide pin bushing and expand tube part, expand tube part includes toper top core and establishes two at least toper sliders on the toper top core circumference outer wall, the hydro-cylinder passes through hydro-cylinder pull rod fixed connection in fixing base one end, the guide pin bushing with fixing base other end fixed connection, the microcephaly end of toper top core passes the guide pin bushing stretches into inside the fixing base with the hydro-cylinder hub connection, the toper slider is close to the one end of toper top core microcephaly end stretches into in the guide pin bushing and with the guide pin bushing passes through elastic component and guide part and is connected. When the oil cylinder piston moves outwards, the oil cylinder shaft drives the end with the large diameter of the conical ejection core to extend out of the conical sliding block, the conical sliding block performs centripetal motion under the matching of the elastic piece and the guide piece of the guide sleeve to change the diameter of the end, which is wrapped with the small diameter of the conical ejection core, and the outer wall of the conical sliding block is sleeved with a stainless steel sleeve to be expanded; when the oil pressure of the oil cylinder continues to rise to reach the set pressure, the oil cylinder resets, the piston moves towards the inside of the oil cylinder, the oil cylinder shaft drives the conical ejection core to move towards the fixed seat, one end with the small diameter of the conical ejection core extends into the fixed seat, the conical sliding block performs centrifugal motion under the cooperation of the elastic piece and the guide piece of the guide sleeve to change the diameter of the conical ejection core and wrap the end with the large diameter of the conical ejection core, and meanwhile, the stainless steel sleeve on the outer wall of the conical sliding block can expand and cling to the inner wall of the plastic lining pipe along with the conical sliding block; the technical scheme does not adopt the traditional elastic glue for pipe expansion, can be frequently used and has long service life; the oil pressure is too high and oil leakage is not generated, the oil cylinder resets when the oil cylinder continues to rise to reach the set pressure, the pipe expansion component performs centripetal shrinkage to process the next plastic lining pipe, and the production and processing efficiency is improved.

Furthermore, one end of the guide sleeve, which is close to the fixed seat, is provided with guide pieces, the number of which is the same as that of the conical sliding blocks, each guide piece comprises a guide screw, and the guide screws penetrate through the guide sleeve and are in threaded connection with the conical sliding blocks. One end, far away from the fixing seat, of the guide sleeve is provided with through holes, the number of the through holes is the same as that of the conical sliding blocks, the elastic pieces are arranged in the through holes and comprise springs and screws, one ends of the springs are connected with the outer walls of the conical sliding blocks, and the other ends of the springs are connected with the screws. Be connected through spring and guide screw between toper slider and the guide pin bushing, guide screw and guide pin bushing do not have fixed connection, so the relative position of toper slider and guide pin bushing circumference has only been fixed in the setting of guide screw, do not restrict toper slider and guide pin bushing radial distance, so toper apical core when toper slider is inside to be removed, because toper apical core different positions have different diameters, when toper slider wraps up the toper slider that removes, carry out centrifugation or centripetal movement under the cooperation of spring and guide screw according to the difference of the diameter of parcel toper core, change toper slider's external diameter, thereby can expand the stainless steel sleeve and hug closely in lining plastic tubing inner wall.

Further, the gap between the conical top core and the conical sliding block ranges from 0.12 mm to 0.2 mm. The clearance is set within the range of 0.12-0.2mm, so that the conical top core can slide flexibly in the conical sliding block and cannot be loosened.

Furthermore, the conical sliding block, the guide sleeve and the fixed seat are all made of 20CrMnTi materials, the conical sliding block, the guide sleeve and the fixed seat are subjected to surface quenching, the hardness is controlled to be 58-61 Rockwell, and the surface fine grinding roughness hardness reaches 0.2. The material of 20CrMnTi is adopted for quenching, the hardness is high, and the service life of the conical sliding block, the guide sleeve and the fixed seat is long.

Further, the conical top core is made of Cr13 material, the conical top core is subjected to surface quenching, the hardness is controlled to be 58-61 Rockwell, the surface fine grinding roughness reaches 0.2, and the conical surface angle of the conical top core is 8 degrees.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model replaces the elastic glue used in the existing tube expander to expand through the matching of the conical surface slide block and the conical top core, and has long service life and low cost; the conical sliding block, the guide sleeve and the fixed seat are made of 20CrMnTi materials and are quenched, so that the hardness is high, the generated expansion force is large, and the phenomenon of slipping caused by insufficient expansion force during processing is avoided; through the cooperation of the oil cylinder and the fixed seat, oil leakage can not be generated when the oil pressure is too high, the oil cylinder resets when the oil cylinder continues to rise to reach the set pressure, the pipe expansion component performs centripetal contraction to process the next plastic lining pipe, and the production and processing efficiency is improved.

Drawings

Fig. 1 is the utility model discloses a reset state structure schematic diagram of hydraulic pressure expand tube device.

Fig. 2 is the structural schematic diagram of the expansion state of the hydraulic tube expansion device of the present invention.

The graphic symbols are illustrated as follows:

1-a fixed seat, 2-a conical top core, 3-a guide sleeve, 4-a conical sliding block, 5-a screw, 6-an oil cylinder, 7-an oil cylinder pull rod, 8-a pull rod nut, 9-a screw, 10-a guide screw, 11-a spring, 12-a piston, 13-a stainless steel sleeve and 14-a lining plastic steel pipe.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

First embodiment

Fig. 1 to fig. 2 show a first embodiment of a hydraulic pipe expanding device according to the present invention. A hydraulic pipe expanding device comprises an oil cylinder 6, a guide sleeve 3, a fixed seat 1 and a pipe expanding component, wherein an oil cylinder pull rod 7 is arranged outside the oil cylinder 6, the oil cylinder pull rod 7 is connected with the fixed seat 1, and the pipe expanding component is connected with the oil cylinder 6 inside the fixed seat 1.

Wherein, the inside piston 12 and the hydro-cylinder axle that are equipped with of hydro-cylinder 6, the expand tube part includes toper slider 4 and toper plunger 2, toper plunger 2 passes the inside of toper slider 4, fixing base 1 carries out fastening connection through location step screw 5 with guide pin bushing 3, the hydro-cylinder axle carries out fixed connection in fixing base 1 and guide pin bushing 3 with the little one end of toper plunger 2 diameter, when piston 12 is inside the removal of hydro-cylinder 6, the piston axle drives toper plunger 2 and removes in fixing base 1, the inside of guide pin bushing 3 and toper slider 4, hydro-cylinder pull rod 7 is connected with fixing base 1.

In addition, the present embodiment is provided with four conical sliding blocks 4, each conical sliding block 4 performs a limitation on a circumferential position with the guide sleeve 3 through a guide screw 10, the guide screw 10 is not fastened with the guide sleeve 3, the guide screw 10 only limits circumferential movement of the conical sliding block 4 in the guide sleeve 3 and does not limit radial movement thereof, the outer wall of the guide sleeve 3 is further provided with four threaded holes penetrating therethrough, four grooves are all provided on the outer walls of the four conical sliding blocks 4, the threaded holes are provided with a screw 9 and a spring 11, one end of the spring 11 is connected with the screw 9, and the other end of the spring 11 is connected with the groove correspondingly connected with the outer wall of the conical sliding block 4.

In addition, the clearance between the conical slide block 4 and the conical top core 2 is set to be 0.17mm, so that the conical top core 2 is ensured to move in the conical slide block 4 and not to be loosened completely.

In addition, the conical sliding block 4, the guide sleeve 3 and the fixed seat 1 are all made of 20CrMnTi, the conical sliding block 4, the guide sleeve 3 and the fixed seat 1 are all subjected to surface quenching, the hardness is controlled to be Rockwell 60, and the surface fine grinding roughness reaches 0.2. The conical ejecting core 2 is made of Cr13 material, the conical ejecting core 2 is subjected to surface quenching, the hardness is controlled at Rockwell 60, the surface fine grinding roughness reaches 0.2, and the conical surface angle of the conical ejecting core 2 is 8 degrees.

The working principle of this embodiment is as follows: in fig. 1, in the embodiment, in a reset state, a piston 12 in an oil cylinder 6 moves to an outlet close to the oil cylinder, one end with a large diameter of a conical plunger 2 extends out of a conical slide block 4, the conical slide block 4 clamps a part with a small diameter of the conical plunger 2, a stainless steel sleeve 13 is sleeved on the outer wall of the conical slide block 4, the whole tube expansion component extends into a processing end of a lining plastic steel tube 14, the piston 12 moves towards the bottom of the oil cylinder 6 to drive an oil cylinder shaft to move, the oil pressure in the oil cylinder 6 is increased, the conical plunger 2 connected with the oil cylinder shaft also moves along with the inside of an oil cylinder shaft fixing seat, one end with a large diameter of the conical plunger 2 slides into the conical slide block 4, because the conical slide block 4 is matched with a guide sleeve 3 through a spring 11 and a guide screw 10, the conical slide block 4 performs centrifugal expansion movement in the guide sleeve 3, the outer diameter of the conical slide block 4 is expanded, so, the oil pressure continues to rise, when the set pressure is reached, the oil cylinder 6 resets, the conical ejection core 2 moves outwards, and the conical sliding block moves centripetally to reduce the diameter of the conical sliding block, so that the next expansion pipe is processed continuously.

Second embodiment

This embodiment is similar to the first embodiment except that the gap between the tapered top core 2 and the tapered slider 4 in this embodiment is 0.19 mm.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (6)

1. A hydraulic pipe expanding device is characterized in that: the oil cylinder is fixedly connected with one end of the fixing seat through an oil cylinder pull rod, the guide sleeve is fixedly connected with the other end of the fixing seat, the small end of the conical ejection core penetrates through the guide sleeve and stretches into the fixing seat, the oil cylinder is connected with the oil cylinder shaft, and one end, close to the small end of the conical ejection core, of the conical ejection core stretches into the guide sleeve and is connected with the guide sleeve through an elastic piece and a guide piece.

2. A hydraulic tube expansion device according to claim 1, wherein: one end of the guide sleeve, which is close to the fixed seat, is provided with guide pieces, the number of which is the same as that of the conical sliding blocks, each guide piece comprises a guide screw, and the guide screws penetrate through the guide sleeve and are in threaded connection with the conical sliding blocks.

3. A hydraulic tube expansion device according to claim 2, wherein: one end, far away from the fixing seat, of the guide sleeve is provided with through holes, the number of the through holes is the same as that of the conical sliding blocks, the elastic pieces are arranged in the through holes and comprise springs and screws, one ends of the springs are connected with the outer walls of the conical sliding blocks, and the other ends of the springs are connected with the screws.

4. A hydraulic tube expansion device according to claim 1, wherein: the clearance range between the conical top core and the conical sliding block is 0.12-0.2 mm.

5. A hydraulic tube expansion device according to claim 4, wherein: the conical sliding block, the guide sleeve and the fixed seat are all made of 20CrMnTi materials, the conical sliding block, the guide sleeve and the fixed seat are subjected to surface quenching, and the hardness is controlled to be 58-61 Rockwell.

6. A hydraulic tube expansion device according to claim 5, wherein: the conical ejecting core is made of Cr13 material, the conical ejecting core is subjected to surface quenching, the hardness is controlled to be Rockwell 58-61, the surface fine grinding roughness reaches 0.2, and the conical surface angle of the conical ejecting core is 8 degrees.

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