CN2145079Y - Device for digging line pressure small-radius mid-frequency elbow - Google Patents
Device for digging line pressure small-radius mid-frequency elbow Download PDFInfo
- Publication number
- CN2145079Y CN2145079Y CN 92237741 CN92237741U CN2145079Y CN 2145079 Y CN2145079 Y CN 2145079Y CN 92237741 CN92237741 CN 92237741 CN 92237741 U CN92237741 U CN 92237741U CN 2145079 Y CN2145079 Y CN 2145079Y
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- pipe
- radius
- frequency
- hydraulic cylinder
- bending
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- Expired - Fee Related
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Abstract
The utility model discloses a device for digging line pressure small-radius mid-frequency elbow pipe. A hydraulic cylinder (1) used for applying pressing is arranged in a pushing force box (2) and is connected with the pushing force box (2) through a hinged supplementary (3). A pipe sleeve (5) is arranged in the center hole of the cover (4) of the pushing force box. Both ends of a bracing cable (6) can respectively be connected with the piston rod of the hydraulic cylinder (1) and an end cover (7). The utility model has the advantages of simple structure, easy fabrication, reliable use, etc. The device for digging line pressure small-radius mid-frequency elbow pipe can be matched with various conventional mid-frequency elbow pipe machines. A small-radius elbow pipe whose bend radius R is equal to 1.5-3D (D stands for the outer diameter of the pipe) can be bent and made.
Description
What the utility model belonged to metal tube does not have machining or process field, particularly electromagnetic induction heating minor radius pipe bending technique substantially.
As everyone knows, present conventional medium frequency bending of pipe machine (see figure 1) both domestic and external, because the bend pipe bending radius of its processing of processing is more little, bend pipe lateral wall reduction is big more, and the ovality in bend pipe cross section is also big more, and madial wall easily produces the undaform wrinkle, lateral wall is prone to intercrystalline crack, thereby seriously restricting the processing process range of this conventional bending machine, that is to say that conventional bending machine is difficult to bend the minor radius bend pipe.
In order to guarantee bending quality, countries such as China and U.S., day have all worked out standard to the operation of intermediate frequency bending machine, and promptly radius of curvature R 〉=3.5D(D is a tube outer diameter), lateral wall reduction ≯ 12.5%.
Along with the development of industries such as the expansion of fired power generating unit capacity and nuclear power station and shipbuilding, chemical industry, oil, need provide the bend pipe of small-bend radius (R/D=1.5～3) for it.Obviously, conventional medium frequency bending of pipe machine can't be realized.For this reason, since 1974, states such as Japan have obtained progress for exploitation intermediate frequency minor radius pipe bending technique has carried out a large amount of experimental studies, have manufactured and designed the compression-type small-radius pipe bender (Fig. 2) of the band countertorque of a series of rigid pivoted structures.Nineteen eighty-two, the Japan first high frequency industrial group manufactured and designed compression-type small-radius pipe bender HPB30(Fig. 3 of Flexible Rotating structure), this bending machine is advanced in the world at present minor radius medium frequency bending of pipe machine, can bend the minor radius bend pipe of bore D≤30 inch radius of curvature R=1.5D.
Rigid system is compared with common medium frequency bending of pipe machine, has set up a chain gear apparatus in rotating shaft, with oil cylinder it is produced pulling force.Bend pipe also bears compression stress except that bearing bending moment in bending forming process, thereby the bend pipe central core is moved outward, reaches the purpose that reduces outside attenuate amount.
Such lathe since the rear portion thrust device except that the output bending moment, also need overcome the countertorque that produces by pull action cylinder, and make its stressed increase more than 2 times.Because countertorque sprocket wheel and bend pipe be in same plane, the stressed genus of rotating shaft space concurrent force system, therefore the stressed labyrinth of whole lathe is huge, and such lathe can bend the minor radius bend pipe that wall thickness approaches.
The master cylinder that produces bending moment in the flexiblesystem is identical with pair its action direction of oil cylinder that produces countertorque, and the pressure that the deformed area bears is making a concerted effort of two oil cylinders, and bending moment also is the moment sums that two oil cylinders produce pipe.Thereby the master of such lathe, to pay oil cylinder load less, and lathe bed is also less.But,, must adopt electronic computer to control a large amount of hydraulic pressure, electric servomechanism because rotating shaft, induction coil and main paying between the oil cylinder are linked.Its machinery, hydraulic pressure, control system are very complicated, and cost is very expensive.And it is very little that it bends the radius adjusting range, only be applicable to bend the minor radius bend pipe of external diameter below 30 inches, thereby applicable surface is wideless.
It is a kind of simple in structure, easy to make that the purpose of this utility model is to provide, service-strong and can with the existing supporting use of conventional medium frequency bending of pipe machine, the pipe inhaul that bends the minor radius bend pipe minor radius swan neck system of exerting pressure.
The technical conceive of realizing the utility model purpose is, according to medium frequency bending of pipe yield zone ess-strain Mechanism analysis, the ratio R/Dm of radius R and average caliber Dm 〉=3.69 o'clock, just might make reduction be not more than 12.5%, make the minor radius bend pipe of R/Dm≤3.69 and reduction △ S≤12.5%, must in the bend pipe process, apply countertorque, to increase the axial compressive force of pipe yield zone, the distortion neutral line is moved outward, thicken the purpose that outside wall thickness reduction reduces thereby reach madial wall.
For above-mentioned technical conceive, the technical solution of the utility model is the hydraulic pressure device for exerting by the pipe rear portion of processed processing, pulling is set in the drag-line of pipe endoporus, the district applies compression stress to eddy-current heating, bend pipe distortion neutral line is moved outward, thereby reach the inboard wall thickness of bend pipe and increase the purpose that outside wall thickness reduction quantitative change is little.By adjusting the pulling force of device for exerting, can obtain the different lateral wall reductions that require.Simultaneously, also can manufacture and design special-purpose minor radius medium frequency bending of pipe machine according to the technical solution of the utility model.
Concrete structure of the present utility model is, it still has the device for exerting that comprises fuel tank, hydraulic pump, pipeline, valve, Pressure gauge and hydraulic cylinder, and said hydraulic cylinder is set in the thrust case, and be connected by hinged pair and thrust case, openend at the thrust case is provided with the thrust case lid, in the centre bore of thrust case lid, be provided with pipe box (this pipe box can be changed according to the ips of processed processing), one end of drag-line can be connected with the piston rod of hydraulic cylinder, and its other end can be connected with end cap (for quick mounting or dismounting are connected).Under operating mode, said drag-line is the endoporus by the pipe of processed processing, and is connected respectively with the end cap of the piston rod of hydraulic cylinder and the terminal that is located at pipe, and under non-operating mode, then can apportion.
Consider the hot operation situation, the said drag-line of the utility model is a chain.
The utility model is compared with prior art (the main small-radius pipe bender of this country in a few days), it is simple in structure, easy to make, the service-strong characteristics are conspicuous, and can with the supporting use of conventional medium frequency bending of pipe machine, then can significantly reduce the investment of bend pipe manufacturer, have tangible economical, societal benefits.
Below in conjunction with drawings and Examples the utility model is further described.
Accompanying drawing 1 is conventional medium frequency bending of pipe machine schematic diagram.
Accompanying drawing 2 is the compression-type minor radius medium frequency bending of pipe machine schematic diagram of the band countertorque of the rigid pivoted structure of Japan's development.
The compression-type minor radius medium frequency bending of pipe machine schematic diagram of the band countertorque of the Flexible Rotating structure that accompanying drawing 3 manufactures and designs for the Japanese first high frequency industrial group.
Accompanying drawing 4 is a kind of structural representation of the present utility model.
Referring to accompanying drawing 4, the hydraulic cylinder (1) that is in the device for exerting is set in the thrust case (2), and be connected by hinged pair (3) and thrust case (2), openend at thrust case (2) is provided with thrust case lid (4), be provided with pipe box (5) in the centre bore of thrust case lid (4), drag-line (6) two ends are connected with end cap (7) with the piston rod of hydraulic cylinder respectively.
In actual applications, the hydraulic cylinder of device for exerting of the present utility model (1), adopt a plurality of hydraulic jacks of single type, to obtain powerful and stable pulling force P2, by oil pump, pressure-control valve, the hydraulic circuit that fuel tank and oil cylinder etc. are formed, integral body is seated in thrust case (2) inside, links with mains cord and external lug, and is aided with controller implementation artificial regulatory.The appearance and size of thrust case (2) can be decided according to the structure of different medium frequency bending of pipe machines.Be located at pipe box (5) and thrust case lid (4) on the thrust casing (1) for movingly.The maximum outside diameter of pipe box (5) will adapt to the ips of various different sizes, can be made into various corresponding specifications, in the hope of changing.And the size of end cap (7) will adapt to the ips of various different sizes equally and makes series.Chain type drag-line (6) can be made into many, and its length can make up according to the tube length of processed processing.The chain type drag-line make circular arc with the tube wall contact position, in order to avoid weigh tube wall wounded.
Course of work when the utility model uses is as follows:
1,, calculates and bend required pulling force P2 according to the specification of relevant formula and tubing with bend parameter.
2, pipe (9) is loaded onto the medium frequency bending of pipe machine, be shelved on the roller (8), and preceding chuck (10) is clamped.
3, drag-line (6) is passed the endoporus of pipe (9).Adjust suitable length, and an end of drag-line (6) is connected with end cap (7), then end cap (7) is fitted in the end of pipe (9).
4, the thrust case (2) of will exerting pressure is loaded onto the medium frequency bending of pipe machine.
5, the piston rod of hydraulic cylinder (1) is protracted, the other end of drag-line (6) is connected with the piston rod of hydraulic cylinder (1).
6, contract after making the piston rod of hydraulic cylinder (1), traction cable (6) drives pipe (9) and moves to left (as shown in Figure 4), and the endoporus of pipe (9) and pipe box (5) are closed.
7, start device for exerting, make pulling force P2 reach predetermined value, and make the P2 value stabilization constant.
8, start medium frequency bending of pipe machine pipe bending (9), until reaching predefined curved angle.
9, bend end after, earlier device for exerting is unloaded, then with bend pipe (9) together with drag-line (6), unload the medium frequency bending of pipe machine together.
10, draw off drag-line (6), promptly make finished product minor radius bend pipe.
Use the utility model can bend all size, the lateral wall wall thickness reduction of radius of curvature R=1.5～3D is less than 12.5% minor radius bend pipe.
Claims (2)
1, a kind of pipe inhaul minor radius medium frequency bending of pipe device of exerting pressure with the device for exerting that comprises fuel tank, hydraulic pump, pipeline, valve, Pressure gauge and hydraulic cylinder (1), it is characterized in that, said hydraulic cylinder (1) is set in the thrust case (2), and be connected by hinged pair (3) and thrust case (2), openend at thrust case (2) is provided with thrust case lid (4), be provided with pipe box (5) in the centre bore of thrust case lid (4), drag-line (6) two ends can be connected with end cap (7) with the piston rod of hydraulic cylinder (1) respectively.
2, the pipe inhaul according to claim 1 minor radius medium frequency bending of pipe device of exerting pressure is characterized in that said drag-line (6) is a chain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92237741 CN2145079Y (en) | 1992-11-19 | 1992-11-19 | Device for digging line pressure small-radius mid-frequency elbow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92237741 CN2145079Y (en) | 1992-11-19 | 1992-11-19 | Device for digging line pressure small-radius mid-frequency elbow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2145079Y true CN2145079Y (en) | 1993-11-03 |
Family
ID=33778942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92237741 Expired - Fee Related CN2145079Y (en) | 1992-11-19 | 1992-11-19 | Device for digging line pressure small-radius mid-frequency elbow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2145079Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597916A (en) * | 2017-09-06 | 2018-01-19 | 渤海重工管道有限公司 | The low thinned bend pipe processing method of small-bend radius wall thickness and medium-frequency pipe bender |
| CN109092950A (en) * | 2018-08-15 | 2018-12-28 | 南昌航空大学 | It is a kind of that o ing apparatus and method are pushed away using the integrated bootstrap loading of pushing |
| CN109092951A (en) * | 2018-08-15 | 2018-12-28 | 南昌航空大学 | It is a kind of that o ing apparatus and method are pushed away using sliding integrated load |
-
1992
- 1992-11-19 CN CN 92237741 patent/CN2145079Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107597916A (en) * | 2017-09-06 | 2018-01-19 | 渤海重工管道有限公司 | The low thinned bend pipe processing method of small-bend radius wall thickness and medium-frequency pipe bender |
| CN109092950A (en) * | 2018-08-15 | 2018-12-28 | 南昌航空大学 | It is a kind of that o ing apparatus and method are pushed away using the integrated bootstrap loading of pushing |
| CN109092951A (en) * | 2018-08-15 | 2018-12-28 | 南昌航空大学 | It is a kind of that o ing apparatus and method are pushed away using sliding integrated load |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |