CN114083490B - Hydraulic stretcher with intelligent calibration function and method thereof - Google Patents
Hydraulic stretcher with intelligent calibration function and method thereof Download PDFInfo
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- CN114083490B CN114083490B CN202210082859.6A CN202210082859A CN114083490B CN 114083490 B CN114083490 B CN 114083490B CN 202210082859 A CN202210082859 A CN 202210082859A CN 114083490 B CN114083490 B CN 114083490B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/143—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same for installing wire thread inserts or tubular threaded inserts
Abstract
The invention belongs to the technical field of hydraulic stretchers, in particular to a hydraulic stretcher with an intelligent calibration function and a method thereof, and aims to solve the problems in the prior art, the hydraulic stretcher comprises an oil cylinder, wherein an oil cavity is arranged in the oil cylinder, an oil cylinder cover is arranged at the top of the oil cylinder, bridges are fixedly connected to two sides of the outer wall of the bottom of the oil cylinder, a sleeve mechanism is arranged between the two bridges, a top shell is arranged above the oil cylinder, an outer ring groove is formed in the top of the top shell, a clamping mechanism is arranged in the outer ring groove, a jacking mechanism is arranged between the oil cylinder and the top shell, the sleeve mechanism comprises a rotary cylinder, and an annular groove with the same inner diameter as the outer diameter of the rotary cylinder is formed in the outer wall of one opposite side of the two bridges. When the bolt is stretched, the two half nuts can be clamped on the bolt through the power of hydraulic oil, and can be clamped on the nut at the bottom through the adjustable rotary cylinder mechanism, so that the workload of workers is reduced, and the cost is reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic stretchers, in particular to a hydraulic stretcher with an intelligent calibration function and a method thereof.
Background
The hydraulic bolt tensioner is called as a hydraulic tensioner for short, has the functions of fastening and dismounting bolts, can be widely applied to industries such as metallurgical mines, petrochemical industry, ship industry, electric power systems, rolling stock, heavy machinery and the like, can be used for fastening or dismounting the bolts by stretching the bolts in an elastic deformation area by using the elastic amplitude allowed by materials by virtue of hydraulic power provided by an ultrahigh pressure pump, can be used as a device for applying axial force by hydraulic interference connection for jacking and mounting, is particularly used in a working environment with serious pollution or limited space area, is difficult to replace by any other tool by adopting the hydraulic tensioner, and is ideal process equipment for assembling large and medium-sized mechanical products and maintaining equipment.
When current hydraulic stretcher is using, when needs are stretched the bolt, need prepare earlier with the roof pressure cap of bolt looks adaptation, when using, the staff need with the roof pressure cap soon to the bolt on, rethread hydraulic stretcher jack-up roof pressure cap just can stretch the bolt, and then lead to the procedure loaded down with trivial details, tensile inefficiency, the preparation of roof pressure cap consumes the cost very much simultaneously.
Disclosure of Invention
Based on the technical problems in the prior art, the invention provides a hydraulic stretcher with an intelligent calibration function and a method thereof.
The hydraulic stretcher with the intelligent calibration function comprises an oil cylinder, wherein an oil cavity is arranged inside the oil cylinder, an oil cylinder cover is arranged at the top of the oil cylinder, bridges are fixedly connected to two sides of the outer wall of the bottom of the oil cylinder, a sleeve mechanism is arranged between the two bridges, a top shell is arranged above the oil cylinder, an outer annular groove is formed in the top of the top shell, a clamping mechanism is arranged inside the outer annular groove, and a top pressing mechanism is arranged between the oil cylinder and the top shell.
Preferably, the sleeve mechanism comprises a rotary drum, annular grooves with the inner diameter the same as the outer diameter of the rotary drum are formed in the outer walls of the two bridges on the opposite sides, and the height of each annular groove is larger than that of the rotary drum.
Preferably, the side outer wall of a section of thick bamboo of revolving is opened has eight annular evenly distributed's wrong hole, and revolves the side inner wall of a section of thick bamboo and open the briquetting groove that has two annular symmetric distributions, and the briquetting groove is located one side that wherein two were twisted the hole, and the side inner wall sliding connection in briquetting groove has the briquetting, and the side outer wall of briquetting is opened has the regulation hole, and the side inner wall of twisting the hole rotates and is connected with adjusting screw, and adjusting screw's side outer wall passes through threaded connection in the side inner wall of regulation hole.
Preferably, the clamping mechanism comprises two semicircular blocks which are connected to the inner wall of the bottom of the outer ring groove in a sliding mode, inner hexagonal grooves are formed in the tops of the two semicircular blocks, the cross sections of the inner hexagonal grooves in the two semicircular blocks form a regular hexagon, a semicircular pressing plate is arranged above the semicircular blocks, guide rods are fixedly connected to two sides of the outer wall of the bottom of the pressing plate, and guide holes matched with the guide rods are formed in the outer wall of the top of the semicircular block.
Preferably, the outer wall of the top of the semicircular block is provided with a compression hole, the outer wall of the top of the compression plate is provided with a through hole corresponding to the compression hole, the inner wall of the side surface of the through hole is slidably connected with a compression nut matched with the compression hole through threads, the inner wall of each side surface of the inner hexagonal groove is connected with a pressing screw through threads, and a half nut is arranged inside the inner hexagonal groove.
Preferably, the top pressure mechanism includes sliding connection in the piston ring of oil pocket side inner wall, and the top outer wall of piston ring opens the through hole that is located the semicircular block below that has two annular symmetric distributions, the side inner wall fixedly connected with top tube of through hole, top tube is bottom open-ended pole tubular structure, the top of top tube extends to one side of semicircular block, the side of semicircular block is slope inclined plane structure down, the top fixedly connected with of top tube and the wedge of semicircular block side looks adaptation, the side outer wall of wedge and the side outer wall sliding connection of semicircular block.
Preferably, the side inner wall sliding connection of a top section of thick bamboo has the piston piece, and fixedly connected with spring between the top outer wall of piston piece and the top inner wall of a top section of thick bamboo, the bottom outer wall fixedly connected with of piston piece extends to the inside connecting rod of oil pocket, the same annular even plate of bottom fixedly connected with of two connecting rods, the top outer wall fixedly connected with of annular even distribution's of even plate ejector pin at least, the top of ejector pin extends to the top of tank cap, the same roof of top fixedly connected with of ejector pin.
The use method of the hydraulic stretcher with the intelligent calibration function comprises the following steps:
s1, taking a nut corresponding to the bolt needing to be stretched in batch, placing the nut inside the rotary cylinder, and screwing the adjusting screw by using a screwdriver so that the two pressing blocks are symmetrically pressed on the two surfaces of the nut;
s2, removing the nut in the S1, and cutting the nut into two halves along two opposite corners to form two half nuts;
s3, placing the two half nuts in the two inner hexagonal grooves respectively and adjusting the abutting screws, enabling the central axes of the half nuts to coincide with the central axis of the semi-ring block when the side faces of the half nuts are pressed on the abutting screws, pressing the compression plate and screwing the compression nut to fix the half nuts.
S4, externally connecting an oil supply system to the oil inlet joint, pressing the rotary cylinder into a nut of the bolt to be stretched, and supplying hydraulic oil into the oil cavity by the oil supply system;
s5, hydraulic oil jacks up the piston ring, the wedge block is jacked up through the jacking cylinder, the wedge block moves upwards and extrudes the semi-annular block to move, the two semi-annular blocks move to drive the semi-nuts to press on the surfaces of the bolts, then the hydraulic oil extrudes the piston block to move upwards, the piston block moves upwards to drive the top plate to move upwards through the annular connecting plate, the top shell is driven to move upwards, the semi-nuts pull the bolts to move upwards, and the tilting rod is inserted into the screwing hole to rotate the rotating cylinder to screw the nuts.
The beneficial effects of the invention are as follows: through setting up half nut and revolving a mechanism, half nut is formed through the nut cutting, revolves a mechanism and can adjust according to the size of nut, and then when carrying out the bolt drawing, can make two half nuts press from both sides tightly on the bolt through the power of hydraulic oil, revolves a mechanism through adjustable and can the centre gripping on the nut of bottom, has reduced staff's work load then, with the cost is reduced.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a hydraulic stretcher with an intelligent calibration function according to the present invention;
fig. 2 is a schematic diagram of an internal structure of a hydraulic stretcher with an intelligent calibration function according to the present invention;
fig. 3 is a schematic diagram of a rotary drum structure of a hydraulic stretcher with an intelligent calibration function according to the present invention;
FIG. 4 is a schematic diagram of an outer ring groove structure of a hydraulic tensioner with an intelligent calibration function according to the present invention;
fig. 5 is a schematic structural diagram of a plate nut of the hydraulic tensioner with an intelligent calibration function according to the present invention.
In the figure: 1. an oil cylinder; 2. an oil cylinder cover; 3. a top rod; 4. a compression nut; 5. a compression plate; 6. a half nut; 7. a top shell; 8. a top plate; 9. rotating the cylinder; 10. screwing holes; 11. a bridge frame; 12. briquetting; 13. an adjusting screw; 14. an oil chamber; 15. a ring-shaped connecting plate; 16. a spring; 17. a top cylinder; 18. a semi-annular block; 19. pressing the screw; 20. a wedge block; 21. a piston block; 22. a piston ring; 23. an oil inlet joint; 24. an annular groove; 25. a guide bar; 26. an outer ring groove; 27. an inner hexagonal groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-5, the hydraulic stretcher with the intelligent calibration function and the method thereof comprise an oil cylinder 1, an oil cavity 14 is arranged inside the oil cylinder 1, an oil cylinder cover 2 is arranged at the top of the oil cylinder 1, bridge frames 11 are fixedly connected to two sides of the outer wall of the bottom of the oil cylinder 1, a sleeve mechanism is arranged between the two bridge frames 11, a top shell 7 is arranged above the oil cylinder 1, an outer annular groove 26 is formed in the top of the top shell 7, a clamping mechanism is arranged inside the outer annular groove 26, and a top pressing mechanism is arranged between the oil cylinder 1 and the top shell 7.
The sleeve mechanism comprises a rotary cylinder 9, annular grooves 24 with the same inner diameter as the outer diameter of the rotary cylinder 9 are formed in the outer walls of the two opposite sides of the two bridges 11, and the height of each annular groove 24 is larger than that of the rotary cylinder 9.
Wherein, the side outer wall of turning a section of thick bamboo 9 is opened has eight annular evenly distributed's wrong hole 10, and the side inner wall of turning a section of thick bamboo 9 is opened has two annular symmetric distributions's briquetting groove, the briquetting groove is located one side of wherein two wrong holes 10, the side inner wall sliding connection in briquetting groove has briquetting 12, the side outer wall of briquetting 12 is opened has the regulation hole, the side inner wall of twisting hole 10 rotates and is connected with adjusting screw 13, adjusting screw 13's side outer wall passes through threaded connection in the side inner wall of regulation hole.
Wherein, clamping mechanism includes the semicircular block 18 of two semicircular sliding connection in the inner wall of outer annular groove 26 bottom, and the top of two semicircular blocks 18 has all been opened interior hexagonal groove 27, a regular hexagon is constituteed to the cross section of interior hexagonal groove 27 on two semicircular blocks 18, the top of semicircular block 18 is provided with semicircular pressure strip 5, the equal fixedly connected with guide bar 25 in bottom outer wall both sides of pressure strip 5, the guiding hole that has with guide bar 25 looks adaptation is opened to the top outer wall of semicircular block 18.
Wherein, the top outer wall of semicircular block 18 is opened and is pressed the hole, and the top outer wall of pressure strip 5 is opened and is had the through-hole that corresponds with the hole that compresses tightly, and the side inner wall sliding connection of through-hole has and compresses tightly hole through screw-thread fit's gland nut 4, and every side inner wall of interior hexagonal groove 27 all has through threaded connection to support pressure screw 19, and the inside of interior hexagonal groove 27 is provided with half nut 6.
The jacking mechanism comprises a piston ring 22 which is connected to the inner wall of the side face of the oil cavity 14 in a sliding mode, a through hole which is symmetrically distributed in an annular mode and located below the semi-annular block 18 is formed in the outer wall of the top of the piston ring 22, a jacking cylinder 17 is fixedly connected to the inner wall of the side face of the through hole, the jacking cylinder 17 is of a rod cylinder structure with an opening in the bottom, the top end of the jacking cylinder 17 extends to one side of the semi-annular block 18, the side face of the semi-annular block 18 is of an inclined face structure with the inclined face facing downwards, a wedge block 20 which is matched with the side face of the semi-annular block 18 is fixedly connected to the top end of the jacking cylinder 17, and the outer wall of the side face of the wedge block 20 is connected with the outer wall of the side face of the semi-annular block 18 in a sliding mode.
Wherein, the side inner wall sliding connection of a top section of thick bamboo 17 has piston block 21, and fixedly connected with spring 16 between the top outer wall of piston block 21 and the top inner wall of a top section of thick bamboo 17, the bottom outer wall fixedly connected with of piston block 21 extends to the inside connecting rod of oil pocket 14, the same annular even plate 15 of bottom fixedly connected with of two connecting rods, the ejector pin 3 of four at least annular evenly distributed of top outer wall fixedly connected with of annular even plate 15, the top of ejector pin 3 extends to the top of tank cap 2, the same roof 8 of top fixedly connected with of ejector pin 3.
When the device is used, a nut corresponding to a bolt needing to be stretched in batches is taken, the nut is placed in the rotary cylinder 9, the adjusting screw 13 is screwed by using a screwdriver, the two pressing blocks 12 are symmetrically pressed on the two surfaces of the nut, then the nut is taken down, the nut is cut into two halves along two opposite angles to form two half nuts 6, the two half nuts 6 are respectively placed in the two inner hexagonal grooves 27, the abutting screw 19 is adjusted, the central axis of the half nut 6 is superposed with the central axis of the semi-annular block 18 when the side surface of the half nut 6 is pressed on the abutting screw 19, the pressing plate 5 is pressed, the pressing nut 4 is screwed to fix the half nut 6, the oil inlet connector 23 is externally connected with an oil supply system, the rotary cylinder 9 is pressed on the nut of the bolt needing to be stretched, the oil supply system supplies hydraulic oil into the oil cavity 14, the piston ring 22 is jacked up by the hydraulic oil, the wedge-shaped block 20 is jacked up by the jacking cylinder 17, wedge 20 moves upward and extrudes semi-ring block 18 to move, two semi-ring blocks 18 move to drive semi-nut 6 to press on the surface of the bolt, then hydraulic oil extrudes piston block 21 to move upward, piston block 21 moves upward and drives top plate 8 to move upward through annular connecting plate 15, and drives top shell 7 to move upward, bolt is pulled to move upward through semi-nut 6, the tilting rod is inserted into screwing hole 10, and rotary cylinder 9 is rotated to screw the nut.
Example 2
The use method of the hydraulic stretcher with the intelligent calibration function comprises the following steps:
s1, taking a nut corresponding to the bolt needing to be stretched in batch, placing the nut inside the rotary cylinder 9, screwing the adjusting screw 13 by using a screwdriver, and enabling the two pressing blocks 12 to be symmetrically pressed on two surfaces of the nut;
s2, taking down the nut in the S1, and cutting the nut into two halves along two opposite corners to form two half nuts 6;
s3, placing the two half nuts 6 in the two inner hexagonal grooves 27 respectively, adjusting the abutting screws 19 to enable the central axes of the half nuts 6 to coincide with the central axis of the semi-annular block 18 when the side faces of the half nuts 6 are pressed on the abutting screws 19, pressing the compression plate 5 on the half nuts 6, and screwing the compression nut 4 to fix the half nuts 6.
S4, externally connecting an oil supply system to the oil inlet joint 23, pressing the rotary cylinder 9 into a nut of a bolt to be stretched, and supplying hydraulic oil into the oil cavity 14 by the oil supply system;
s5, hydraulic oil jacks up the piston ring 22, the wedge block 20 is jacked up through the jacking cylinder 17, the wedge block 20 moves upwards and extrudes the semi-annular blocks 18 to move, the two semi-annular blocks 18 move to drive the semi-nuts 6 to press on the surfaces of the bolts, then the hydraulic oil extrudes the piston block 21 to move upwards, the piston block 21 moves upwards to drive the top plate 8 to move upwards through the annular connecting plate 15 and drive the top shell 7 to move upwards, the bolts are pulled to move upwards through the semi-nuts 6, and the tilting rods are inserted into the screwing holes 10 to rotate the rotary cylinders 9 to screw the nuts.
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 (2)
1. The hydraulic stretcher with the intelligent calibration function comprises an oil cylinder (1), wherein an oil cavity (14) is formed in the oil cylinder (1), and an oil cylinder cover (2) is arranged at the top of the oil cylinder (1), and is characterized in that bridge frames (11) are fixedly connected to two sides of the outer wall of the bottom of the oil cylinder (1), a sleeve mechanism is arranged between the two bridge frames (11), a top shell (7) is arranged above the oil cylinder (1), an outer annular groove (26) is formed in the top of the top shell (7), a clamping mechanism is arranged in the outer annular groove (26), and a jacking mechanism is arranged between the oil cylinder (1) and the top shell (7);
the sleeve mechanism comprises a rotary cylinder (9), annular grooves (24) with the inner diameter the same as the outer diameter of the rotary cylinder (9) are formed in the outer walls of the opposite sides of the two bridges (11), and the height of each annular groove (24) is larger than that of the rotary cylinder (9);
eight annular screwing holes (10) which are uniformly distributed are formed in the outer wall of the side face of the rotary cylinder (9), two pressing block grooves which are symmetrically distributed in an annular mode are formed in the inner wall of the side face of the rotary cylinder (9), the pressing block grooves are located on one side of the two screwing holes (10), pressing blocks (12) are connected to the inner wall of the side face of each pressing block groove in a sliding mode, adjusting holes are formed in the outer wall of the side face of each pressing block (12), adjusting screws (13) are rotatably connected to the inner wall of the side face of each screwing hole (10), and the outer wall of the side face of each adjusting screw (13) is connected to the inner wall of the side face of each adjusting hole through threads;
the clamping mechanism comprises two semi-annular blocks (18) which are connected to the inner wall of the bottom of an outer annular groove (26) in a sliding mode, inner hexagonal grooves (27) are formed in the tops of the two semi-annular blocks (18), the cross sections of the inner hexagonal grooves (27) in the two semi-annular blocks (18) form a regular hexagon, a semi-annular pressing plate (5) is arranged above the semi-annular blocks (18), guide rods (25) are fixedly connected to two sides of the outer wall of the bottom of the pressing plate (5), and guide holes matched with the guide rods (25) are formed in the outer wall of the top of each semi-annular block (18);
the outer wall of the top of the semi-annular block (18) is provided with a compression hole, the outer wall of the top of the compression plate (5) is provided with a through hole corresponding to the compression hole, the inner wall of the side surface of the through hole is connected with a compression nut (4) in a sliding manner, the compression nut is in threaded fit with the compression hole, the inner wall of each side surface of the inner hexagonal groove (27) is connected with a pressing screw (19) through threads, and a semi-nut (6) is arranged inside the inner hexagonal groove (27);
the jacking mechanism comprises a piston ring (22) which is slidably connected to the inner wall of the side face of the oil cavity (14), the outer wall of the top of the piston ring (22) is provided with two through holes which are symmetrically distributed in an annular manner and are positioned below the semi-annular block (18), the inner wall of the side face of each through hole is fixedly connected with a jacking cylinder (17), each jacking cylinder (17) is of a rod cylinder structure with an opening at the bottom, the top end of each jacking cylinder (17) extends to one side of the semi-annular block (18), the side face of each semi-annular block (18) is of an inclined face structure inclining downwards, the top end of each jacking cylinder (17) is fixedly connected with a wedge block (20) matched with the side face of each semi-annular block (18), and the outer wall of the side face of each wedge block (20) is slidably connected with the outer wall of the side face of each semi-annular block (18);
the side inner wall sliding connection of a top section of thick bamboo (17) has piston piece (21), and fixedly connected with spring (16) between the top outer wall of piston piece (21) and the top inner wall of a top section of thick bamboo (17), the bottom outer wall fixedly connected with of piston piece (21) extends to the inside connecting rod of oil pocket (14), the same annular even board (15) of bottom fixedly connected with of two connecting rods, the ejector pin (3) of four at least annular evenly distributed of top outer wall fixedly connected with of annular even distribution of even board (15), the top of ejector pin (3) extends to the top of tank cap (2), the same roof (8) of top fixedly connected with of ejector pin (3).
2. The use method of the hydraulic stretcher with the intelligent calibration function, which is used for realizing the intelligent calibration function, is characterized by comprising the following steps:
s1, taking a nut corresponding to the bolt needing to be stretched in batch, placing the nut in the rotary cylinder (9), screwing the adjusting screw (13) by using a screwdriver, and enabling the two pressing blocks (12) to be symmetrically pressed on the two surfaces of the nut;
s2, removing the nut in the S1, and cutting the nut into two halves along two opposite corners to form two half nuts (6);
s3, placing the two half nuts (6) in the two inner hexagonal grooves (27) respectively and adjusting the abutting screws (19) to enable the central axes of the half nuts (6) to coincide with the central axis of the semi-annular block (18) when the side faces of the half nuts (6) are pressed on the abutting screws (19), pressing the compression plate (5) and screwing the compression nut (4) to fix the half nuts (6);
s4, externally connecting an oil supply system to the oil inlet joint (23), pressing the rotary cylinder (9) into a nut of a bolt to be stretched, and supplying hydraulic oil into the oil cavity (14) by the oil supply system;
s5, hydraulic oil jacks up a piston ring (22), a wedge block (20) is jacked up through a jacking cylinder (17), the wedge block (20) moves upwards and extrudes a semi-annular block (18) to move, two semi-annular blocks (18) move to drive a semi-nut (6) to press on the surface of a bolt, then hydraulic oil extrudes the piston block (21) to move upwards, the piston block (21) moves upwards to drive a top plate (8) to move upwards through an annular connecting plate (15) and drive a jacking shell (7) to move upwards, the bolt is pulled to move upwards through the semi-nut (6), and a tilting rod is inserted into a screwing hole (10) to rotate a screwing cylinder (9) to screw the nut.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210082859.6A CN114083490B (en) | 2022-01-25 | 2022-01-25 | Hydraulic stretcher with intelligent calibration function and method thereof |
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| CN202210082859.6A CN114083490B (en) | 2022-01-25 | 2022-01-25 | Hydraulic stretcher with intelligent calibration function and method thereof |
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| CN207824443U (en) * | 2018-01-08 | 2018-09-07 | 歌尔科技有限公司 | A kind of internal clamp system |
| CN207824799U (en) * | 2018-02-08 | 2018-09-07 | 大连泰凯工业有限公司 | The quick plug-in for being exclusively used in nuclear pressure container flange bolt stretcher stretches nut |
| CN112171541A (en) * | 2020-09-02 | 2021-01-05 | 慈兴集团有限公司 | Automatic clamping mechanism |
| CN112247544A (en) * | 2020-10-16 | 2021-01-22 | 韩俊满 | Portable integral type bolt stretcher |
| CN113649977A (en) * | 2021-10-19 | 2021-11-16 | 江苏华恩机械科技有限公司 | Split type general type high accuracy hydraulic stretcher |
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| CN114083490A (en) | 2022-02-25 |
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