CN111958953B

CN111958953B - Expansion joint forming device and machining process thereof

Info

Publication number: CN111958953B
Application number: CN202010805823.7A
Authority: CN
Inventors: 谢金山; 帅昱良; 蔡晓恒
Original assignee: YONGSHENG MACHINERY INDUSTRIAL (KUNSHAN) CO LTD
Current assignee: YONGSHENG MACHINERY INDUSTRIAL (KUNSHAN) CO LTD
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2022-06-03
Anticipated expiration: 2040-08-12
Also published as: CN111958953A

Abstract

The invention discloses an expansion joint forming device which comprises a base, a first split die, a second split die and an oil hydraulic cylinder, wherein the first split die and the second split die are sleeved on the base in an annular body, a colloid is arranged in the first split die and the second split die, fixed lantern rings with the same height are arranged on the outer sides of the annular bodies formed by the first split die and the second split die, the oil hydraulic cylinder is arranged above the base, a piston rod of the oil hydraulic cylinder is connected with a pressure head, and meanwhile, a processing technology for forming an expansion joint of a corrugated pipe is further provided. The beneficial effects of the invention are: the flexible deformation of the formed pipeline is realized through the colloid, the formed pipeline is in a required structure, the damage caused by extrusion and stretching of equipment or the pipeline due to creep deformation caused by thermal barrier cold contraction is avoided, and meanwhile, the structure is simple, the production and the processing are easy, the forming qualification rate of the formed pipeline is high, the cost is low, and the service life of the equipment is long.

Description

Expansion joint forming device and machining process thereof

Technical Field

The invention relates to the technical field of expansion joint forming, in particular to a device for forming an expansion joint and a processing technology thereof.

Background

The expansion joint as an elastic compensation element capable of freely stretching has the advantages of reliable work, good performance, compact structure and the like, and is widely applied to the fields of electric power, chemical industry, metallurgy, urban construction and the like. Common expansion joint forming methods include expansion and contraction processing forming and hydraulic extrusion forming, wherein the expansion and contraction processing forming needs to preheat a preformed piece to enable the preformed piece to reach a deformation condition, and then the preformed piece is formed into a required structural shape through extrusion or stretching, and the expansion joint forming method is complex in structure, multiple in equipment procedures and high in processing cost; the hydraulic extrusion molding is to extrude the preformed pieces through the die, the preformed pieces are directly extruded, the structure of the preformed pieces is easily broken and crushed, the preformed pieces cannot reach the expected shape, the requirement on equipment is high, and the molding qualified rate is low.

Disclosure of Invention

The present invention is directed to an expansion joint forming apparatus and a method for manufacturing the same, which solve the above problems of the related art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a be used for expansion joint forming device, includes base, first components of a whole that can function independently mould, second components of a whole that can function independently mould, oil hydraulic cylinder, first components of a whole that can function independently mould and second components of a whole that can function independently mould become a ring type body cover locate the base on, be equipped with the colloid in it, along the ring type body outside that first components of a whole that can function independently mould and second components of a whole that can function independently mould is equipped with the fixed lantern ring of co-altitude, the top of base is equipped with oil hydraulic cylinder, be connected with the pressure head on oil hydraulic cylinder's the piston rod.

Preferably, the middle of the base is provided with a raised circular step, and a circular base plate is arranged on the raised circular step.

Further preferably, a sealing ring is pressed below the base plate, and the diameter of the sealing ring is larger than that of the base plate.

Preferably, the first split die and the second split die are identical in structure, corrugated grooves are formed in the inner sides of the first split die and the second split die, and a plurality of exhaust holes which penetrate horizontally are formed in the circumferential direction of the grooves.

Further preferably, a plurality of through holes which penetrate horizontally are formed in the fixing lantern ring.

Further preferably, the through hole is connected with a detector.

Further preferably, the colloid is a rubber elastomer or a semi-fluid silica gel.

Further preferably, the fixing sleeve ring is provided with a locking device.

The invention also provides a processing technology for forming the expansion joint of the corrugated pipe, which comprises the following steps:

s1) sleeving the formed pipe on the circular step of the base, folding the first split die and the second split die, and wrapping the formed pipe in the middle;

s2) sleeving the fixing lantern ring on the outer sides of the first split die and the second split die and locking;

s3) putting the colloid into a pipeline of the formed pipe;

s4), starting the oil hydraulic cylinder, driving a pressure head to move downwards through a piston rod, and applying downward pressure on the colloid until the pressure head moves downwards to a set position;

s5) detecting whether the formed pipe is extruded in place through the through holes and the exhaust holes, and completely filling the corrugated grooves on the first split die and the second split die;

s6), after the forming pipe is determined to be formed in place, the pressure head is lifted through the piston rod, and then the fixed lantern ring is loosened and taken down;

s7) separating the first split die from the second split die, wherein the colloid is recovered, and the molded pipe which is completely molded is taken out.

Advantageous effects

The device for forming the expansion joint and the manufacturing method thereof realize the flexible deformation of the formed pipeline through the colloid, so that the formed pipeline is formed into a required structure, the damage caused by the extrusion and the stretching of equipment or the pipeline due to the creep deformation generated by thermal barrier cold contraction is avoided, meanwhile, the device has a simple structure, is easy to produce and process, and has high forming qualification rate of the formed pipeline, low cost and long service life of the equipment.

Drawings

FIG. 1 is a schematic illustration of an embodiment of the disclosed expansion joint forming apparatus without pressing;

FIG. 2 is a schematic view of a piston rod of the expansion joint forming device according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of the piston rod being lifted after the forming of the formed tube according to the embodiment of the present invention;

FIG. 4 is a schematic illustration of a mounting collar shown in an embodiment of the present invention;

fig. 5 is a schematic diagram of the first split mold and the second split mold separated according to the embodiment of the invention.

Reference numerals

1-a base, 2-a sealing ring, 3-colloid, 4-a fixed lantern ring, 5-an exhaust hole, 6-a first split mould, 7-a backing plate, 8-a through hole, 9-a second split mould, 10-a pressure head, 11-a piston rod, 12-an oil hydraulic cylinder and 13-a forming pipe.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Examples

As shown in fig. 1-5, a device for forming an expansion joint comprises a base 1, a first split mold 6, a second split mold 9, and an oil pressure cylinder 12, wherein the first split mold 6 and the second split mold 9 form a ring-shaped body sleeved on the base 1, a colloid 3 is arranged in the ring-shaped body, a fixed lantern ring 4 with the same height is arranged on the outer side of the ring-shaped body formed by the first split mold 6 and the second split mold 9, the oil pressure cylinder 12 is arranged above the base 1, and a piston rod 11 of the oil pressure cylinder 12 is connected with a pressure head 10.

Preferably, the middle of the base 1 is provided with a raised circular step, a circular base plate 7 is arranged on the raised circular step, the base plate 7 is a smooth light plate, so that the colloid 3 on the base plate is uniformly stressed, and the colloid 3 and the base 1 are prevented from being adhered together to cause the colloid 3 to be not well taken down.

Preferably, a sealing ring 2 is arranged below the base plate 7 in a pressing mode, the diameter of the sealing ring 2 is larger than that of the base plate 7, the sealing ring 2 can prevent the colloid 3 from flowing downwards and deforming when being deformed under stress, the colloid enters a gap between the forming pipe 13 and the base 1, and the forming pipe 13 and the base 1 are fixed to cause the forming pipe 13 and the base 1 to be fixed and cannot be taken down.

Preferably, the first split die 6 and the second split die 9 have the same structure, corrugated grooves are formed in the inner sides of the first split die and the second split die, and a plurality of exhaust holes 5 which horizontally penetrate through the grooves are formed in the circumferential direction of the grooves.

The corrugated grooves are used for expansion forming of the formed pipe 13, the shape of the corrugated grooves is the appearance of the formed pipe 13, and the size, the number and the shape of the corrugated grooves are determined by the corrugated grooves on the first split die 6 and the second split die 9. The exhaust holes 5 are used for exhausting air between the forming pipe 13 and the corrugated groove during forming, and air is prevented from obstructing the forming of the forming pipe 13.

Preferably, be equipped with a plurality of levels on the fixed lantern ring 4 and run through's through-hole 8, through-hole 8 corresponds the setting with exhaust hole 5 and communicates, the discharge of the air in the ripple recess of being convenient for, and check out test set permeable through-hole 8 and exhaust hole 5 monitor and inspect the forming state of shaping tubular product 13 simultaneously.

Preferably, the through hole 8 is connected with a detector for detecting whether the formed pipe 13 is formed in place, so that the formed pipe 13 is processed more accurately, and the qualified rate of forming is improved.

Preferably, the colloid 3 is a rubber elastomer or a semi-fluid silica gel, and can deform under the action of the pressure head 10 to force the side wall of the formed tube 13 to deform, so that the side wall deforms along the directions of the corrugated grooves on the first split mold 6 and the second split mold 9, and the formed tube 13 becomes a required structural shape. Meanwhile, the rubber 3 of the rubber elastomer or the semi-fluid silica gel does not damage the molded tube 13, and has a protection effect on the inside of the molded tube 13.

Preferably, the fixing collar 4 is provided with a locking means.

A processing technology for forming a corrugated pipe expansion joint comprises the following steps:

s1) sleeving the formed pipe 13 on the circular step of the base 1, folding the first split die 6 and the second split die 9, and wrapping the formed pipe 13 in the middle;

s2) sleeving the fixing lantern ring 4 on the outer sides of the first split die 6 and the second split die 9 and locking;

s3) putting the colloid 3 into the pipeline of the forming pipe 13;

s4), starting the oil hydraulic cylinder 12, driving the pressure head 10 to move downwards through the piston rod 11, and applying downward pressure on the colloid 3 until the pressure head 10 moves downwards to a set position;

s5) detecting whether the formed pipe 13 is extruded in place through the through hole 8 and the exhaust hole 5, and completely filling the corrugated grooves on the first split die 6 and the second split die 9;

s6), after the forming pipe 13 is formed in place, the pressure head 10 is lifted through the piston rod 11, and then the fixed lantern ring 4 is loosened and taken down;

s7) separating the first split mold 6 and the second split mold 9, and taking out the molded tube 13 that has been completely molded by the gel 3 being restored.

By the expansion joint forming device and the processing technology thereof, the phenomenon that the molecular structure of a formed pipe changes or the equipment is damaged due to the change of external natural environment factors can be avoided.

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 changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the content of the present invention within the scope of the protection of the present invention.

Claims

1. A be used for expansion joint forming device which characterized in that: including base (1), first branch phantom (6), second branch phantom (9), oil hydraulic cylinder (12), first branch phantom (6) and second branch phantom (9) constitute a ring type body cover and locate base (1), are equipped with colloid (3) in it, along the ring type outside that first branch phantom (6) and second branch phantom (9) are constituteed is equipped with the fixed lantern ring (4) of the same height, the top of base (1) is equipped with oil hydraulic cylinder (12), be connected with pressure head (10) on piston rod (11) of oil hydraulic cylinder (12), first branch phantom (6) and second branch phantom (9) structure are the same, and its inboard is equipped with the ripple recess, along the circumferencial direction of recess is equipped with exhaust hole (5) that a plurality of levels run through, colloid (3) are rubber elastomer or semi-flow silica gel.

2. A molding apparatus for an expansion joint according to claim 1, wherein: the middle of the base (1) is provided with a raised circular step, and a circular base plate (7) is arranged on the raised circular step.

3. A molding apparatus for an expansion joint according to claim 2, wherein: the sealing ring (2) is arranged below the backing plate (7) in a pressing mode, and the diameter of the sealing ring (2) is larger than that of the backing plate (7).

4. A molding apparatus for an expansion joint according to claim 1, wherein: the fixed lantern ring (4) is provided with a plurality of through holes (8) which penetrate horizontally.

5. An expansion joint forming apparatus according to claim 4, wherein: the through hole (8) is connected with a detector.

6. A molding apparatus for an expansion joint according to claim 1, wherein: the fixed lantern ring (4) is provided with a locking device.

7. A process for forming an expansion joint, wherein the apparatus for forming an expansion joint according to any one of claims 1 to 6 is used, comprising the steps of:

s1) sleeving the formed pipe (13) on the circular step of the base (1), folding the first split die (6) and the second split die (9), and wrapping the formed pipe (13) in the middle;

s2) sleeving the fixing lantern ring (4) on the outer sides of the first split die (6) and the second split die (9) and locking;

s3) putting the colloid (3) into a pipeline of a forming pipe (13);

s4), starting the oil hydraulic cylinder (12), driving the pressure head (10) to move downwards through the piston rod (11), and applying downward pressure on the colloid (3) until the pressure head (10) moves downwards to a set position;

s5), detecting whether the formed pipe (13) is extruded in place through the through hole (8) and the exhaust hole (5), and completely filling the corrugated grooves on the first split die (6) and the second split die (9);

s6), after the forming pipe (13) is formed in place, the pressure head (10) is lifted through the piston rod (11), and then the fixed lantern ring (4) is loosened and taken down;

s7) separating the first split die (6) and the second split die (9), wherein the colloid (3) is recovered, and the formed pipe (13) which is completely formed is taken out.