CN115492545A - Automatic hydraulic pipe drawing machine - Google Patents
Automatic hydraulic pipe drawing machine Download PDFInfo
- Publication number
- CN115492545A CN115492545A CN202211102832.5A CN202211102832A CN115492545A CN 115492545 A CN115492545 A CN 115492545A CN 202211102832 A CN202211102832 A CN 202211102832A CN 115492545 A CN115492545 A CN 115492545A
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- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 87
- 238000010276 construction Methods 0.000 description 3
- 238000000605 extraction Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
An automatic hydraulic pipe drawing machine comprises a hydraulic station and a host machine, wherein the host machine comprises two lifting oil cylinders which are arranged in parallel, piston rods of the two lifting oil cylinders face downwards, the lower ends of the piston rods of the two lifting oil cylinders are respectively connected with a base, a cross beam is connected between cylinder bodies of the two lifting oil cylinders, and a through hole and a clamping mechanism are arranged in the center of the cross beam; the clamping mechanism comprises clamping oil cylinders and guide blocks which are uniformly distributed on the cross beam along the circumferential direction, the upper ends of piston rods of the clamping oil cylinders are connected with an annular clamping connection disc, the parts, corresponding to the guide blocks, of the clamping connection disc are respectively connected with a slip seat through pin shafts, waist-shaped holes are formed in the slip seats, slips are respectively fixed on the inner sides of the waist-shaped holes, mutually-matched inclined planes are arranged between the lower parts of the outer sides of the slip seats and the corresponding guide blocks, and the inclined planes and the guide blocks are respectively connected in a matched mode through dovetail grooves and dovetail bosses which are respectively arranged on the inclined planes in a sliding fit mode. The beneficial effects are that: the lifting device is suitable for various field uneven ground operations, and has large lifting force, strong adaptability and flexible use; the chucking is firm, and work efficiency is high.
Description
Technical Field
The invention relates to the field of tube drawing machines, in particular to an automatic hydraulic tube drawing machine.
Background
The hydraulic tube drawing machines applied to pipeline maintenance in industries such as electric power, petrochemical industry, oil field and the like in the market at present have different tonnage and form. However, the method has respective defects, and the diameter range of the tube drawing of some main machines is small, so that the clamps need to be replaced frequently by hand, time and labor are wasted, and the cost is high; some clamping devices are not automatically lifted, manual operation is needed, after a section of pipe is pulled up each time, the clamping devices are manually operated, the automation degree is low, and the efficiency is low; and the number of the lifting oil cylinders of some main machines is three or four, so that the machine cannot adapt to the field operation terrain environment, and the flexibility and the adaptability of the pipe drawing machine are poor.
The publication No. CN210289679U discloses a drilling sleeve pipe extraction device, including hydraulic pressure tube extraction device and hydraulic power pump station, hydraulic pressure tube extraction device includes the bedplate and fixes two hydro-cylinders on the bedplate, the hydro-cylinder passes through hydraulic pressure oil pipe and links to each other with hydraulic power pump station, the surface of bedplate is provided with the through-hole, it is provided with movable cross beam to be located between two hydro-cylinders, be provided with the slide bar that stretches out and transversely runs through the hydro-cylinder respectively to two hydro-cylinder directions on the movable cross beam, slide bar and the hydro-cylinder between link to each other, movable cross beam's surface is provided with the through-hole that supplies the sleeve pipe to pass, the through-hole is mutually opposite with the through-hole, movable cross beam's both ends leave the distance respectively between two hydro-cylinders, be provided with the fixture that is used for the sleeve pipe centre gripping of passing the through-hole fixed on the movable cross beam, still be provided with the vibrations source on the movable cross beam.
Although the drill hole sleeve pipe pulling-out device has the advantages that the sleeve pipe is shaken before pipe pulling, so that the gap between the sleeve pipe and the soil layer is increased, the pulling-out force is reduced, and a better pulling-out effect is achieved. However, the following problems exist in the use of the method: 1. the two vertically arranged oil cylinders are respectively connected to two ends of the seat plate, when the device is used, the sleeve can be clamped through the clamping mechanism only by sitting on the flat ground through the seat plate, and the sleeve can be vertically pulled out through the two oil cylinders, so that the device has to be flat on the ground and is not suitable for uneven ground operation in the field; 2. the clamping mechanism pushes the clamping jaws through a hydraulic pushing device, so that the clamping jaws move oppositely to clamp the sleeve; the clamping mechanism has limited clamping force and poor clamping firmness, and the clamping jaw and the sleeve are easy to slip, so that the clamping mechanism needs to vibrate firstly before tube drawing and then draw the tube, thereby reducing the tube drawing efficiency.
Disclosure of Invention
The invention aims to solve the technical problem of providing an automatic hydraulic pipe drawing machine which is suitable for field uneven ground operation, firm in clamping and high in working efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an automatic hydraulic pressure drawbench, includes hydraulic pressure station and host computer, the host computer includes two parallel arrangement's lift cylinder, and its characterized in that: the piston rods of the two lifting oil cylinders are downward, the lower ends of the piston rods are respectively connected with a base, a cross beam is connected between the cylinder bodies of the two lifting oil cylinders, a through hole is formed in the center of the cross beam, and a clamping mechanism is arranged on the through hole and used for clamping a pipe to be pulled;
the clamping mechanism comprises clamping oil cylinders and guide blocks which are uniformly distributed on the cross beam along the circumferential direction, the clamping oil cylinders and the guide blocks are arranged at intervals, the upper end of a piston rod of each clamping oil cylinder is connected with an annular clamping tool connecting disc, the parts, corresponding to the guide blocks, on the clamping tool connecting disc are respectively connected with a slip seat through pin shafts, the parts, corresponding to the pin shafts, on the slip seats are provided with kidney-shaped holes, slips are respectively fixed on the inner sides of the slip seats, mutually matched inclined planes are arranged between the lower parts of the outer sides of the slip seats and the corresponding guide blocks, and the slip seats and the guide blocks are inserted in a sliding fit mode through dovetail grooves and dovetail bosses respectively arranged on the inclined planes;
the hydraulic station is respectively connected with the two lifting oil cylinders and the clamping oil cylinder through independent valve plates and is used for controlling the two lifting oil cylinders to independently or synchronously act and the clamping oil cylinder to synchronously act.
Preferably, the inner edge of the slip is arc-shaped, the inner edge of the slip is provided with saw-toothed teeth, and the tooth tip of each tooth inclines upwards.
Preferably, the included angle between the two tooth surfaces of each tooth of the inner edge of the slip is 70 degrees, the included angle between the upper tooth surface and the horizontal plane is 15 degrees, and the included angle between the lower tooth surface and the horizontal plane is 55 degrees.
As further preferred, be equipped with the rectangle recess at the slips seat inboard, be equipped with outside the slips with rectangle recess complex rectangle boss, the slips inserts respectively through the rectangle boss and is connected with the slips seat in the rectangle recess that corresponds and through the screw.
Preferably, the included angle between the central line of the waist-shaped hole and the horizontal plane is 17 degrees, and the included angle between the inclined plane on the outer side of the slip seat and the vertical plane is 15 degrees.
Preferably, a synchronous shunt motor is arranged on the cross beam, and a multi-way reversing valve of the hydraulic station is communicated with a rod cavity of each clamping oil cylinder through the synchronous shunt motor and is used for realizing synchronous retraction of the clamping oil cylinders.
Preferably, the hydraulic station comprises an engine, an oil pump, a multi-way reversing valve and an oil tank, wherein the output end of the engine is in transmission connection with the input end of the oil pump and is used for providing pressure oil for a hydraulic system; so as to facilitate field operation.
Preferably, the multi-way reversing valve is formed by connecting three valve plates in parallel, each valve plate is an O-shaped three-position six-way manual reversing valve, working ports A of the first valve plate and the second valve plate are respectively connected with rodless cavities of two lifting oil cylinders, and working ports B of the first valve plate and the second valve plate are respectively connected with rod cavities of the two lifting oil cylinders; the working port A of the third valve plate is communicated with the rod cavity of each clamping oil cylinder through the synchronous shunt motor, and the working port B of the third valve plate is communicated with the rodless cavity of each clamping oil cylinder.
The beneficial effects of the invention are as follows:
1. because the piston rods of the two lifting oil cylinders are downward and the lower ends of the piston rods are respectively connected with the base, and the hydraulic station is respectively connected with the two lifting oil cylinders through independent valve plates, the two lifting oil cylinders can be controlled to independently or synchronously act, the hydraulic lifting device can be suitable for various field uneven ground operations, and is large in lifting force, strong in adaptability and flexible to use.
2. The clamping mechanism comprises a clamping oil cylinder and guide blocks which are uniformly distributed on the circumference, the upper end of a piston rod of the clamping oil cylinder is connected with a clamping connection disc, slip seats are respectively connected to the clamping connection disc through pin shafts corresponding to the guide blocks, kidney-shaped holes are formed in the slip seats corresponding to the pin shafts, slips are respectively fixed on the inner sides of the slip seats, mutually matched inclined planes are arranged between the lower parts of the outer sides of the slip seats and the corresponding guide blocks, and the slip seats and the corresponding guide blocks are inserted and connected in a sliding fit mode through dovetail grooves and dovetail bosses which are respectively arranged on the inclined planes; through the expansion and contraction of the clamping oil cylinder, the slip seat and the slip can be driven to slide up and down along the guide block through the clamping connecting disc, so that the pipe to be pulled is attached or loosened, the slip is large in opening size, and the application range is wide; when the pipe is waiting to be pulled out in the slips chucking, drive shifting up of crossbeam through the lift cylinder, can make the slips chucking wait to pull out the pipe gradually, avoid appearing skidding, the chucking is firm, need not vibrations before pulling out the pipe, work efficiency is high.
Drawings
FIG. 1 is a schematic diagram of the structure of the host of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is a schematic diagram of the hydraulic station of the present invention;
fig. 4 is a hydraulic schematic of the present invention.
Fig. 5 is a schematic view of the construction of the chucking mechanism of the present invention.
Fig. 6 is a top view of fig. 5.
Fig. 7 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 6.
Figure 8 is a schematic view of the construction of the slip bowl of the present invention.
Fig. 9 is a sectional view B-B of fig. 8.
FIG. 10 is a schematic view of the slip construction of the present invention.
In the figure: the device comprises a lifting oil cylinder 1, a cross beam 2, a clamping oil cylinder 3, a slip seat 4, a clamping apparatus connecting disc 5, a synchronous shunt motor 6, a guide block 7, a base 8, a slip 9, a pin shaft 10, an engine 11, an oil pump 12, a multi-way reversing valve 14, an oil tank 13, a first valve plate 15, a second valve plate 16 and a third valve plate 17.
Detailed Description
The invention will be further explained with reference to the drawings.
As shown in fig. 1-10, the automatic hydraulic pipe drawing bench related to the invention comprises a hydraulic station and a main machine, wherein the main machine comprises two vertical and parallel lifting oil cylinders 1, piston rods of the two lifting oil cylinders 1 face downwards, the lower ends of the piston rods are respectively connected with a base 8 through threads, a cross beam 2 is connected between cylinder bodies of the two lifting oil cylinders 1 through bolts, a through hole is formed in the center of the cross beam 2, and a clamping mechanism is arranged on the through hole and used for penetrating and clamping a pipe to be drawn.
The clamping mechanism comprises clamping oil cylinders 3 and guide blocks 7 which are uniformly fixed on a cross beam 2 along the circumferential direction of a through hole, the clamping oil cylinders 3 and the guide blocks 7 are respectively three, the cylinder bodies of the clamping oil cylinders 3 are inserted into mounting holes formed in the cross beam and fixed on the cross beam 2 through bolts, the clamping oil cylinders 3 and the guide blocks 7 are arranged at intervals, the upper ends of piston rods of the clamping oil cylinders 3 are connected with an annular clamping tool connecting disc 5 through screws, pin shaft seats are welded at positions corresponding to the guide blocks 7 below the clamping tool connecting disc 5 respectively and connected with a slip seat 4 through pin shafts 10, kidney-shaped holes 401 are arranged at positions corresponding to the pin shafts 10 at the upper part of the slip seat 4 respectively, slips 9 are fixed at the lower part of the inner side of the slip seat 4 respectively, inclined planes matched with each other are arranged between the lower part of the outer side of the slip seat 4 and the corresponding guide blocks 7, dovetail grooves 402 are arranged in the middle of the inclined planes of the slip seat 4, dovetail bosses 701 matched with the dovetail grooves 402 in a sliding mode are arranged on the inclined planes of the guide blocks 7, and the dovetail bosses 701 in a sliding mode.
The inner edge of the slip 9 is arc-shaped, the inner edge of the slip 9 is provided with sawtooth-shaped teeth 901, and the tooth tips of all the teeth are inclined upwards. The included angle of the two tooth surfaces of each tooth on the inner edge of the slip 9 is 70 degrees, the included angle of the upper tooth surface and the horizontal plane is 15 degrees, and the included angle of the lower tooth surface and the horizontal plane is 55 degrees.
The inner sides of the slip seats 4 are respectively provided with a rectangular groove 403, the outer sides of the slips 9 are respectively provided with a rectangular boss 902 matched with the rectangular groove 403, and the slips 9 are respectively inserted into the corresponding rectangular grooves 403 through the rectangular bosses 902 and are connected with the slip seats 4 through two hexagon socket head cap screws arranged up and down.
The contained angle of waist type hole 401 and horizontal plane is 17 degrees and waist type hole 401's outer end downward sloping, the inclined plane in the slips seat 4 outside is 15 degrees with the contained angle of perpendicular, when making lifting cylinder 1 drive crossbeam 2 upwards promote, makes slips 9 can the chucking gradually wait to pull out the pipe.
The hydraulic station is respectively connected with the two lifting oil cylinders 1 and the clamping oil cylinder 3 through independent valve plates, oil pipes and quick connectors and is used for controlling the independent or synchronous action of the two lifting oil cylinders 1 and the synchronous action of the clamping oil cylinder 3. A synchronous shunt motor 6 is fixed on one side of the clamping mechanism on the cross beam 2, and a multi-way reversing valve 14 of the hydraulic station is communicated with a rod cavity of each clamping oil cylinder 3 through the synchronous shunt motor 6 and is used for realizing synchronous retraction of the clamping oil cylinders 3.
The hydraulic station comprises an engine 11, an oil pump 12, the multi-way directional valve 14 and an oil tank 13, wherein the engine 11 is preferably a diesel generator, the output end of the engine is in transmission connection with the input end of the oil pump 12, the oil outlet of the oil pump 12 is communicated with the oil inlet P of the multi-way directional valve 14 through an oil pipe, and the oil pipe is used for providing pressure oil for a hydraulic system so as to facilitate field operation. An oil return port T of the multi-way directional valve 14 is communicated with the oil tank 13.
The multi-way reversing valve 14 is formed by connecting three valve plates in parallel, each valve plate is an O-shaped three-position six-way manual reversing valve, working ports A of a first valve plate 15 and a second valve plate 16 are respectively connected with rodless cavities of two lifting oil cylinders 1, and working ports B of the first valve plate 15 and the second valve plate 16 are respectively connected with rod cavities of the two lifting oil cylinders 1; used for controlling the two lifting oil cylinders 1 to act independently or synchronously; the working port A of the third valve piece 17 is communicated with the rod cavity of each clamping cylinder 3 through the synchronous shunt motor 6, and the working port B of the third valve piece 17 is communicated with the rodless cavity of each clamping cylinder 3 and used for controlling the synchronous action of the three clamping cylinders 3.
When in use, the operation process is as follows:
1. two lifting oil cylinders 1 of a host are placed on two sides of a pipe to be pulled, a crane and other tools are used for adjusting the center of a through hole on a beam 2 to align to the center of the pipe to be pulled, and a bearing pad is padded under a base 8; starting an engine to drive an oil pump to rotate, operating the first valve plate 15 or the second valve plate 16 to change to a working port A for oil outlet according to the ground flatness condition after the engine speed is normal, allowing hydraulic oil to enter a rodless cavity of the lifting oil cylinder 1, extending a piston rod of the lifting oil cylinder 1 until the cross beam 2 reaches the level, and operating the first valve plate 15 or the second valve plate 16 to return to the middle position;
2. operating the third valve sheet 17 to enable the working port B to discharge oil, and enabling the piston rods of the three clamping oil cylinders 3 to synchronously extend out until the diameter of the bayonet of the slip 9 is larger than that of the pipe to be pulled; operating the third valve plate 17 to the neutral position;
3. operating the third valve piece 17 to enable the working port A to discharge oil, enabling the piston rods of the three clamping oil cylinders 3 to retract synchronously, and driving the slip seat 4 and the slips 9 to move downwards along the inclined angle of the inclined plane of the guide block 7 until the slips are tightly attached to the outer wall of the pipe to be pulled; the third valve plate 17 is operated to return to the middle position, and the hydraulic oil in the rodless cavities of the three clamping oil cylinders 3 is sealed;
4. slowly and simultaneously operating the first valve plate 15 and the second valve plate 16 to simultaneously discharge oil from the working ports A of the two valve plates to the rodless cavities of the two lifting oil cylinders 1, so that the piston rods of the two lifting oil cylinders 1 extend out simultaneously, and simultaneously, the cross beam 2 is driven to move upwards stably; along with the upward movement of the cross beam 2, the three slips 9 gradually clamp the pipe to be pulled under the action of the inclination angle of the inclined plane of the guide block 7 and the friction force of the inner edge teeth, and along with the extension of the piston rod of the lifting oil cylinder 1, the oil pressure gradually rises, so that the pipe to be pulled can be slowly pulled to the maximum stroke. And then simultaneously operating the first valve plate 15 and the second valve plate 16 to the neutral position. And operating the third valve piece 17 to discharge oil from the working opening B, enabling the hydraulic oil to enter a rodless cavity of the clamping oil cylinder 3, lifting the slip seat 4 to a certain height through the fixture connecting disc 5, enabling the slip 9 to loosen the pipe to be pulled, and operating the third valve piece 17 to a middle position. Then, the first valve plate and the second valve plate are operated simultaneously, so that the two working ports B discharge oil to rod cavities of the two lifting oil cylinders 1, the piston rods retract, and the cross beam 2 is driven to move downwards until the lowest point;
5. repeating the steps 3 and 4 until the pipe to be drawn is completely drawn out and moved out of the pipe drawing machine, operating a third valve plate 17 to a working port A for oil outlet, enabling the piston rods of the three clamping oil cylinders 3 to retract simultaneously, returning the slips 9, and operating the third valve plate 17 to a middle position;
then, operating the first valve plate and the second valve plate simultaneously to enable the working port B to feed oil to rod cavities of the two lifting oil cylinders 1 and control piston rods of the lifting oil cylinders 1 to return to the original positions; the engine is then turned off and the operation is finished.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides an automatic hydraulic pressure drawbench, includes hydraulic pressure station and host computer, the host computer includes two parallel arrangement's lift cylinder, characterized by: the piston rods of the two lifting oil cylinders are downward, the lower ends of the piston rods are respectively connected with a base, a cross beam is connected between the cylinder bodies of the two lifting oil cylinders, a through hole is formed in the center of the cross beam, and a clamping mechanism is arranged on the through hole and used for clamping a pipe to be pulled;
the clamping mechanism comprises a clamping oil cylinder and guide blocks which are uniformly distributed on the cross beam along the circumferential direction, the clamping oil cylinder and the guide blocks are arranged at intervals, the upper end of a piston rod of the clamping oil cylinder is connected with an annular clamping connecting disc, the clamping connecting disc is connected with a slip seat through a pin shaft at the position corresponding to each guide block, a kidney-shaped hole is formed in the slip seat corresponding to the pin shaft, slips are fixed on the inner sides of the slip seats respectively, mutually matched inclined planes are arranged between the lower part of the outer side of each slip seat and the corresponding guide block, and the slip seats and the guide blocks are inserted in a sliding fit mode through dovetail grooves and dovetail bosses which are arranged on the inclined planes respectively;
the hydraulic station is respectively connected with the two lifting oil cylinders and the clamping oil cylinder through independent valve plates and is used for controlling the independent or synchronous action of the two lifting oil cylinders and the synchronous action of the clamping oil cylinder.
2. The automatic hydraulic drawbench of claim 1, further comprising: the inner edge of the slip is arc-shaped, the inner edge of the slip is provided with sawtooth-shaped teeth, and the tooth tip of each tooth inclines upwards.
3. The automatic hydraulic drawbench of claim 2, further comprising: the included angle of two tooth surfaces of each tooth of the inner edge of the slip is 70 degrees, the included angle of the upper tooth surface and the horizontal plane is 15 degrees, and the included angle of the lower tooth surface and the horizontal plane is 55 degrees.
4. An automatic hydraulic drawbench as claimed in any one of claims 1-3, characterized by: the slip is characterized in that a rectangular groove is formed in the inner side of the slip seat, a rectangular boss matched with the rectangular groove is arranged on the outer side of the slip, and the slip is inserted into the corresponding rectangular groove through the rectangular boss and connected with the slip seat through a screw.
5. The automatic hydraulic drawbench of claim 4, wherein: the contained angle of the central line and the horizontal plane of waist type hole is 17 degrees, the inclined plane and the contained angle of perpendicular in the slip seat outside are 15 degrees.
6. The automatic hydraulic drawbench of claim 1 or 5, wherein: and a synchronous shunt motor is arranged on the cross beam, and a multi-way reversing valve of the hydraulic station is communicated with a rod cavity of each clamping oil cylinder through the synchronous shunt motor and is used for realizing synchronous retraction of the clamping oil cylinders.
7. The automatic hydraulic drawbench of claim 6, wherein: the hydraulic station comprises an engine, an oil pump, a multi-way reversing valve and an oil tank, wherein the output end of the engine is in transmission connection with the input end of the oil pump and is used for providing pressure oil for a hydraulic system; so as to facilitate field operation.
8. The automatic hydraulic drawbench of claim 7, further comprising: the multi-way reversing valve is formed by connecting three valve plates in parallel, each valve plate is an O-shaped three-position six-way manual reversing valve, the working ports A of the first valve plate and the second valve plate are respectively connected with rodless cavities of two lifting oil cylinders, and the working ports B of the first valve plate and the second valve plate are respectively connected with rod cavities of the two lifting oil cylinders; the working port A of the third valve plate is communicated with the rod cavity of each clamping oil cylinder through the synchronous shunt motor, and the working port B of the third valve plate is communicated with the rodless cavity of each clamping oil cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211102832.5A CN115492545A (en) | 2022-09-09 | 2022-09-09 | Automatic hydraulic pipe drawing machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211102832.5A CN115492545A (en) | 2022-09-09 | 2022-09-09 | Automatic hydraulic pipe drawing machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115492545A true CN115492545A (en) | 2022-12-20 |
Family
ID=84467742
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211102832.5A Pending CN115492545A (en) | 2022-09-09 | 2022-09-09 | Automatic hydraulic pipe drawing machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115492545A (en) |
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2022
- 2022-09-09 CN CN202211102832.5A patent/CN115492545A/en active Pending
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