CN202239140U - Bending equipment for urea class stainless steel tubes - Google Patents
Bending equipment for urea class stainless steel tubes Download PDFInfo
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- CN202239140U CN202239140U CN2011203578195U CN201120357819U CN202239140U CN 202239140 U CN202239140 U CN 202239140U CN 2011203578195 U CN2011203578195 U CN 2011203578195U CN 201120357819 U CN201120357819 U CN 201120357819U CN 202239140 U CN202239140 U CN 202239140U
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- main shaft
- wire rope
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Abstract
The utility model relates to bending equipment for urea class stainless steel tubes and a bending method thereof. The bending equipment comprises a pushing part A, a bending part B and a pulling part C which are arranged on a steel plate of a reinforced concrete foundation, and a device for shaping the end part of a formed elbow pipe, wherein an oil cylinder of the pushing part A is butted against the tail end of a bent steel pipe inserted into the bending part B and pushes the bent steel pipe to move forwards; the pulling part C controls a wire rope to pull a turntable and an elbow pipe die to rotate through a windlass, to bend the clamped bent steel pipe; and the pushing part A and the pulling part C synchronously work to conduct push-and-pull type bending operation, or only the pulling part C is actuated to conduct pull type bending operation. The bending method comprises the following steps: (1) testing incoming materials; (2) preparing before bending; (3) bending the pipe; (4) taking out of the die, and testing; (5) shaping the end part of the elbow pipe; (6) machining with an elbow pipe beveling machine; (7) testing; (8) carrying out acid washing and passivation; and (9) packaging and warehousing. The bending equipment provided by the utility model can replace the bending equipment imported from overseas, so as to shorten purchasing cycle and reduce cost.
Description
Technical field
The utility model relates to petrochemical industry urea plant 316Lmod pipeline process equipment, refers in particular to a kind of curving apparatus of urea class stainless steel pipe.
Background technology
316Lmod urea level super-low carbon stainless steel is a 316L modified form material, the petrochemical industry urea plant high pressure line material of doing commonly used.Urea plant has high temperature, high pressure, characteristics such as inflammable, explosive, perishable, and maximum working pressure reaches 15 MPa, and maximum operating temperature reaches 385 ℃, and its groundwork medium is highly corrosive materials such as methylamine, urine, liquefied ammonia.The medium that wherein corrosivity is the strongest is the first ammonium salt solution under the HTHP, and stainless steel is had very strong intercrystalline corrosion ability.When phosphorus content is lower than 0.03% super-low carbon stainless steel (316lmod) because carbon content is extremely low; The stainless steel chromium carbide Cr23C6 that (austenitic stainless steel sensitizing temperature scope is 450-850 ℃) separates out at intergranular when the sensitization state is obviously reduced, and have good anti intercrystalline corrosion ability.The balance of austenite former of this material conduit and piping component and welding material (Ni, C, N, Mn etc.) and ferrite former (Cr, Mo, Si etc.) should make and can obtain complete austenite structure at postwelding that maximum ferrite content is 0.6%.The 316Lmod pipeline that uses in China's urea stripper plant is that external import standard component, elbow and accessory are formed all, and cost is very high.
Summary of the invention
The purpose of the utility model is to improve and innovate to the shortcoming that exists in the background technology and problem, and a kind of curving apparatus of urea class stainless steel pipe is provided.
The comprising propulsive units A on the steel plate that is arranged on reinforced concrete foundation, bend part B and pull portion structure C of the utility model, and moulding bend pipe end apparatus for shaping, wherein:
Propulsive units A comprises the oil cylinder seat that is fixed on the steel plate, is arranged on the oil cylinder on the oil cylinder seat;
Bend part B and comprise that the bottom is fixed on the main shaft in the reinforced concrete foundation; Be sleeved on the main shaft and around the rotating disk and the bending die of main axis rotation; Be arranged on bending die top and be fixed on the upper cover plate on the steel plate through the cover plate support column; Wherein a side of bending die is provided with stopping means, and chuck and take-up housing before corresponding opposite side is provided with bend in the slide block of steel pipe insertion take-up housing and are stretched between bending die and the preceding chuck;
Pull portion structure C comprises hoist engine and the steel wire rope of winding on rotating disk that is fixedly installed on the steel plate, and wherein steel wire rope one end is connected with hoist engine through main rope, and the other end is connected with hoist engine through secondary steel wire rope;
Moulding bend pipe end apparatus for shaping comprises press bed; Be arranged on the following sizing die on the press bed; Be arranged on down the last sizing die on the sizing die; And being arranged on the press pressure head on the sizing die, the bend pipe that wherein bends moulding inserts in the shaping hole that sizing die and last sizing die form down and carries out the end shaping;
The oil cylinder of described propulsive units A withstands on and bends the curved steel pipe tail end of quilt that part B goes up insertion, and promotes to be travelled forward by curved steel pipe; Pull portion structure C bends the curved steel pipe of the quilt that inserts and puts through hoist engine control steel wire rope pulling rotating disk and bending die rotation; And propulsive units A and pull portion structure C synchronous working are carried out the plug-type operation that bends, and perhaps only start pull portion structure C and carry out the pure pull-type operation that bends.
Advantage of the utility model and beneficial effect:
The utility model is exactly anti intercrystalline corrosion ability, the ferrite content index of material with the most basic requirement of 316lmod pipeline; Ferrite content detects with the ferrite measuring instrument; Need reach maximum ferrite content and be 0.6% standard, underproof pipeline of ferrite content and piping component and welding material are forbidden to come into operation.The 316Lmod pipeline that uses in China's urea stripper plant is that external import standard component, elbow and accessory are formed all, and cost is very high, and procurement cycle is shortened in the alternative external import of 316lmod pipeline that the utility model is made, and reduces cost.
Description of drawings
Fig. 1 is the utility model curving apparatus plan structure sketch map.
Fig. 2 is the moulding bend pipe end apparatus for shaping structural representation of the utility model curving apparatus.
Fig. 3 be the utility model curving apparatus bend the part-structure sketch map.
Fig. 4 is Fig. 3 A-A cross-sectional view.
The specific embodiment
The utility model comprises propulsive units A on the steel plate 17 that is arranged on reinforced concrete foundation 1, bends part B and pull portion structure C, and moulding bend pipe end apparatus for shaping, wherein:
Propulsive units A comprises the oil cylinder seat 20 that is fixed on the steel plate 17, is arranged on the oil cylinder 21 on the oil cylinder seat 20;
Bend part B and comprise that the bottom is fixed on the main shaft 16 in the reinforced concrete foundation 1; Be sleeved on the main shaft 16 and around the rotating disk 10 and the bending die 9 of main shaft 16 rotations; Be arranged on bending die 9 tops and be fixed on the upper cover plate 5 on the steel plate 17 through cover plate support column 2; Wherein a side of bending die 9 is provided with stopping means 36, and chuck 28 and take-up housing 6 before corresponding opposite side is provided with bend in the slide block 19 of steel pipe 22 insertion take-up housings 6 and are stretched between bending die 9 and the preceding chuck 28; Said take-up housing 6 connects clamping part 29 through pin 30, and through the curved steel pipe 22 of quilt between clamping part 29 adjustment and clamping bending die 9 and the preceding chuck 28;
Pull portion structure C comprises hoist engine 24 and the steel wire rope 11 of winding on rotating disk 10 that is fixedly installed on the steel plate 17, and wherein steel wire rope 11 1 ends are connected with hoist engine 24 through main rope 27, and the other end is connected with hoist engine 24 through secondary steel wire rope 23;
Moulding bend pipe end apparatus for shaping comprises press bed 31; Be arranged on the following sizing die 32 on the press bed 31; Be arranged on down the last sizing die 34 on the sizing die 32; And being arranged on the press pressure head 35 on the sizing die 34, the bend pipe that wherein bends moulding inserts in the shaping hole 33 that sizing die 32 and last sizing die 34 form down and carries out the end shaping;
The oil cylinder 21 of described propulsive units A withstands on and bends curved steel pipe 22 tail ends of quilt that part B goes up insertion, and promotes to be travelled forward by curved steel pipe 22; Pull portion structure C bends the curved steel pipe 22 of the quilt that inserts and puts through hoist engine 24 control steel wire ropes, 11 pulling rotating disks 10 and bending die 9 rotations; And propulsive units A and pull portion structure C synchronous working are carried out the plug-type operation that bends, and perhaps only start pull portion structure C and carry out the pure pull-type operation that bends.
Be provided with collar bush 15 between the bottom of the described main shaft 16 of the utility model and the reinforced concrete foundation 1, the top of main shaft 16 and upper cover plate 5 junctions are provided with main shaft support cover 7, and main shaft 16 rotatablely moves in collar bush 15 and main shaft support cover 7.Be provided with copper sheathing 14 between described rotating disk 10 endoporus and the main shaft 16, the inboard of rotating disk 10 bottoms and the outside also are respectively arranged with rotary disk basement 13, the support roller 12 of the support and the power of reducing friction.Described bending die 9 removable being set on the main shaft 16, and link into an integrated entity through stop latch 8 and rotating disk 10.Described take-up housing 6 the inners are provided with the slide block 19 of band semi arch groove, bent steel pipe 22 and insert in the groove, and slide block 19 slides in take-up housing 6 through the roller 18 that is provided with.Described upper cover plate 5 is fixed into one with cover plate support column 2 through cover plate alignment pin 4.Described steel wire rope 11 two ends are connected with secondary steel wire rope 23 with main rope 27 through assembly pulley 26 respectively, and the other end of main rope 27 and secondary steel wire rope 23 is connected with hoist engine 24 through anchoring pile 25.
The structural principle of the utility model curving apparatus:
The bending method of the utility model may further comprise the steps:
1) Incoming Quality Control: check whether preprocessing tubing is the model of required processing by the sign on the curved steel pipe, and whether measure pipe length, external diameter, wall thickness etc. qualified, check, detect errorless back and get into next step;
2) bend preceding preparation:
A, adopted bag to isolate the mode and carbon steel isolation of cloth by curved steel tubing, and carry out prefabricated to tubing by the drawing required size to preprocessing;
B, the needs utilization is prolonged the tubing that pipe bends; Needing will be integrally welded by curved steel tubing and carbon steel pipe through butt welding; The curved steel tubing of quilt is processed the curved eventually point of bend pipe and is at least 100mm apart from welding seam distance during welding, and the splash in the welding process must not contact with the curved steel tubing of quilt;
C, adjustment curving apparatus: selected bending die also installs, and whether each parts of inspection curving apparatus put in place, confirm that the mode that bends is plug-type bending, and perhaps is pure pull-type bending;
3) tubing bends, and can adopt any one of following two kinds of modes:
A, plug-type bending: will be placed between slide block and bending die and the preceding chuck by curved steel pipe, will be clamped by curved steel pipe, and adjust through stopping means and to bend angle through clamping part and preceding chuck; Oil cylinder is withstood on by the tail end of curved steel pipe; Open oil cylinder and promote to be travelled forward by curved steel pipe, open hoist engine simultaneously, steel wire rope drives dial rotation; Bending die and rotating disk fuse and rotate with same angular speed; Drive by curved steel pipe and bend forward, and speed that hoist engine draws in the course of work and the speed synchronization that oil cylinder pushes away, promptly bent bending of steel pipe tubing with plug-type the completion;
B, pure pull-type bending: will be placed between slide block and bending die and the preceding chuck by curved steel pipe, will be clamped by curved steel pipe, and adjust through stopping means and to bend angle through clamping part and preceding chuck; Open hoist engine, steel wire rope drives dial rotation, and bending die and rotating disk fuse and with same angular speed rotation, drive the curved steel pipe of quilt and bend forward, promptly with pure pull-type the bending by curved steel pipe tubing of accomplishing;
4) go out modulo n check, will take off from curving apparatus, and whether inspection bends angle and meet the requirements through the bend pipe that the last step bends moulding; Bend pipe ovality≤6%, bend pipe angle of bend Deviation Control are in ± 0.5 °, and the back reduction is 6.5% of the tube wall thickness that provides at most; The inboard wave degree of bend pipe≤2%; The bending radius deviation≤± 3mm, center to end size deviation≤± 2mm, the tube end ovality is controlled at 1%; To carry out next step operation, should reserve allowance when line, blanking to satisfactory bend pipe line, blanking;
5) bend pipe end shaping: the shaping hole of bend pipe end apparatus for shaping is put in the bend pipe end that will pass through the step making, starts press, and the press pressure head compresses sizing die and following sizing die, makes the ovality of bend pipe end reach requirement;
6) bend pipe beveling machine processing utilizes boring machine and stainless steel knife etc. that bend pipe is carried out groove processing, makes bevel angle reach standard-required;
7) check comprises:
A, bend pipe ovality≤6%; Bend pipe angle of bend Deviation Control is in ± 0.5 °; The back reduction is 6.5% of the tube wall thickness that provides at most, the inboard wave degree of bend pipe≤2%, and the bending radius deviation≤± 3mm; Center to end size deviation≤± 2mm, bend pipe end ovality is controlled in 1%;
B, ferrite content check, all position ferrite contents must not surpass 0.6%;
C, dye penetrant inspection check;
D, inspection bend pipe outer surface must not have defectives such as tangible impression, fold, cut;
8) pickling, passivation are carried out pickling, Passivation Treatment to the bend pipe outer surface that was up to the standards through the last step;
9) at last qualified bend pipe material, specification, angle are sprayed mark and promptly form qualified standard elbow, the packing warehouse-in gets final product.
The utility model is that Sichuan Meiqing Cyanamide Co., Ltd. produces the elbow-making in 300,000 tons of urea entry means of 200,000 tons of synthetic ammonia coproducings per year; Accomplish the production domesticization of 316Lmod urea gas device pipeline; This device drives to work well to meet design requirement at present for this reason, is highly commended by customers deeply.The utility model is that Dalian is transported great International Trading Company Ltd and processed a collection of 316Lmod winding pipe exit Burma.
The described embodiment of the utility model only is the description that the preferred implementation of the utility model is carried out; Be not that the utility model design and scope are limited; Under the prerequisite that does not break away from the utility model design philosophy, engineers and technicians make the technical scheme of the utility model in this area various modification and improvement all should fall into the protection domain of the utility model; The technology contents that the utility model is asked for protection all is documented in claims.
Claims (7)
1. the curving apparatus of a urea class stainless steel pipe is characterized in that comprising propulsive units (A) on the steel plate (17) that is arranged on reinforced concrete foundation (1), bends part (B) and pull portion structure (C), reaches moulding bend pipe end apparatus for shaping, wherein:
Propulsive units (A) comprises the oil cylinder seat (20) that is fixed on the steel plate (17), is arranged on the oil cylinder (21) on the oil cylinder seat (20);
Bend part (B) and comprise that the bottom is fixed on the main shaft (16) in the reinforced concrete foundation (1); Be sleeved on that main shaft (16) is gone up and around the rotating disk (10) and the bending die (9) of main shaft (16) rotation; Be arranged on bending die (9) top and be fixed on the upper cover plate (5) on the steel plate (17) through cover plate support column (2); Wherein a side of bending die (9) is provided with stopping means (36); Corresponding opposite side is provided with preceding chuck (28) and take-up housing (6), bend in the slide block (19) of steel pipe (22) insertion take-up housing (6) and stretches between bending die (9) and the preceding chuck (28);
Pull portion structure (C) comprises the hoist engine (24) that is fixedly installed on the steel plate (17); With the steel wire rope (11) of winding on rotating disk (10); Wherein steel wire rope (11) one ends are connected with hoist engine (24) through main rope (27), and the other end is connected with hoist engine (24) through secondary steel wire rope (23);
Moulding bend pipe end apparatus for shaping comprises press bed (31); Be arranged on the following sizing die (32) on the press bed (31); Be arranged on down the last sizing die (34) on the sizing die (32); And being arranged on the press pressure head (35) on the sizing die (34), the bend pipe that wherein bends moulding inserts in the shaping hole (33) of sizing die (32) and last sizing die (34) formation down and carries out the end shaping;
The oil cylinder (21) of described propulsive units (A) withstands on and bends curved steel pipe (22) tail end of quilt that part (B) goes up insertion, and promotes to be travelled forward by curved steel pipe (22); Pull portion structure (C) bends the curved steel pipe (22) of the quilt that inserts and puts through hoist engine (24) control steel wire rope (11) pulling rotating disk (10) and bending die (9) rotation; And propulsive units (A) and pull portion structure (C) synchronous working are carried out the plug-type operation that bends, and perhaps only start pull portion structure (C) and carry out the pure pull-type operation that bends.
2. the curving apparatus of urea class stainless steel pipe according to claim 1; It is characterized in that being provided with collar bush (15) between bottom and the reinforced concrete foundation (1) of described main shaft (16); The top of main shaft (16) and upper cover plate (5) junction are provided with main shaft support cover (7), and main shaft (16) rotatablely moves in collar bush (15) and main shaft support cover (7).
3. the curving apparatus of urea class stainless steel pipe according to claim 1; It is characterized in that being provided with copper sheathing (14) between described rotating disk (10) endoporus and the main shaft (16), the inboard of rotating disk (10) bottom and the outside also are respectively arranged with rotary disk basement (13), the support roller (12) of the support and the power of reducing friction.
4. the curving apparatus of urea class stainless steel pipe according to claim 1 is characterized in that described bending die (9) is removable to be set on the main shaft (16), and links into an integrated entity through stop latch (8) and rotating disk (10).
5. the curving apparatus of urea class stainless steel pipe according to claim 1; It is characterized in that described take-up housing (6) the inner is provided with the slide block (19) of band semi arch groove; Inserted in the groove by curved steel pipe (22), and slide block (19) slides in take-up housing (6) through the roller (18) that is provided with.
6. the curving apparatus of urea class stainless steel pipe according to claim 1 is characterized in that described upper cover plate (5) and cover plate support column (2) are fixed into one through cover plate alignment pin (4).
7. the curving apparatus of urea class stainless steel pipe according to claim 1; It is characterized in that described steel wire rope (11) two ends are connected with secondary steel wire rope (23) with main rope (27) through assembly pulley (26) respectively, the other end of main rope (27) and secondary steel wire rope (23) is connected with hoist engine (24) through anchoring pile (25).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203578195U CN202239140U (en) | 2011-09-23 | 2011-09-23 | Bending equipment for urea class stainless steel tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203578195U CN202239140U (en) | 2011-09-23 | 2011-09-23 | Bending equipment for urea class stainless steel tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202239140U true CN202239140U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203578195U Expired - Fee Related CN202239140U (en) | 2011-09-23 | 2011-09-23 | Bending equipment for urea class stainless steel tubes |
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|---|---|
| CN (1) | CN202239140U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380529A (en) * | 2011-09-23 | 2012-03-21 | 湖南四化建高压阀门管件有限公司 | Bending equipment of urea-level stainless steel pipe and bending method |
| CN112427514A (en) * | 2020-10-29 | 2021-03-02 | 中国石油天然气集团有限公司 | Large-caliber thick-wall medium-frequency heating bending elbow pipe shape online control system and method |
-
2011
- 2011-09-23 CN CN2011203578195U patent/CN202239140U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102380529A (en) * | 2011-09-23 | 2012-03-21 | 湖南四化建高压阀门管件有限公司 | Bending equipment of urea-level stainless steel pipe and bending method |
| CN112427514A (en) * | 2020-10-29 | 2021-03-02 | 中国石油天然气集团有限公司 | Large-caliber thick-wall medium-frequency heating bending elbow pipe shape online control system and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20150923 |
|
| EXPY | Termination of patent right or utility model |