CN110900506A - High-precision hydraulic stretcher - Google Patents
High-precision hydraulic stretcher Download PDFInfo
- Publication number
- CN110900506A CN110900506A CN201911155289.3A CN201911155289A CN110900506A CN 110900506 A CN110900506 A CN 110900506A CN 201911155289 A CN201911155289 A CN 201911155289A CN 110900506 A CN110900506 A CN 110900506A
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- hydraulic
- drive plate
- sleeve
- digital
- nut
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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
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- Mechanical Engineering (AREA)
- Hand Tools For Fitting Together And Separating, Or Other Hand Tools (AREA)
Abstract
The invention discloses a high-precision hydraulic stretcher, wherein a sleeve support is sleeved at the upper end of a support seat, the upper end of a stretching nut is provided with a flange, the lower end of the stretching nut extends into the sleeve and the support seat and can be matched with a bolt, the sleeve is provided with a hydraulic channel, the outlet of the hydraulic channel is in sliding fit with a piston, the inlet of the hydraulic channel is connected with a digital hydraulic pump through a quick connector, the flange can be pushed upwards when the piston works, a constant torque assembly comprises a knob arranged on the support seat and a drive plate which can be matched and sleeved on, the digital hydraulic pump is digitally controlled and can detect, display and adjust hydraulic pressure, and the network control terminal can be connected with the digital hydraulic pumps of a plurality of the stretchers in a networking mode, controls the digital hydraulic pumps to synchronously work and display and adjust the hydraulic pressure. The invention realizes constant force pre-tightening and high-precision synchronous equivalent pressurization, and improves the disassembly and assembly precision and the disassembly and assembly efficiency.
Description
Technical Field
The invention relates to a high-precision hydraulic stretcher.
Background
The hydraulic stretcher is a large-diameter bolt pre-tightening and disassembling tool, and the principle is that through hydraulic power, the bolt is stretched in an elastic deformation area by using the elastic amplitude allowed by materials, so that the purpose of pre-tightening or disassembling is achieved. The operation is simple, the use is convenient, and the safety is high, so the method is widely applied to industries such as metallurgical mines, petrochemical industry, ship industry, electric power systems, rolling stock, heavy machinery and the like.
The existing hydraulic stretcher cannot perform high-precision equivalent pressurization on a bolt and perform constant-force pre-tightening on a nut, and therefore assembly precision and use convenience are affected.
Disclosure of Invention
The invention aims to provide a high-precision hydraulic stretcher, which realizes the constant force pre-tightening of nuts and the high-precision equivalent pressurization of bolts, can adapt to nuts and bolts of different specifications, and has the advantages of convenient operation and good synchronization effect.
The technical scheme adopted by the invention is as follows:
a high-precision hydraulic stretcher comprises a supporting seat, a sleeve, a stretching nut, an annular piston, a digital hydraulic pump, a constant-torque assembly and a network control terminal; the support seat can be sleeved outside the nut, the sleeve is supported by the sleeve and sleeved on the upper end of the support seat, the upper end of the stretching nut is provided with a flange, the lower end of the stretching nut extends into the sleeve and the support seat and can be matched with the bolt, a hydraulic channel is arranged on the sleeve, an inlet of the hydraulic channel is positioned on the side surface of the sleeve, an outlet of the hydraulic channel is positioned on the top surface of the sleeve and is annular, the outlet of the hydraulic channel is in sliding fit with the piston, the inlet of the hydraulic channel is connected with the digital hydraulic pump through a quick connector, the flange can be pushed up when the piston works, the constant torque component comprises a knob arranged on the support seat, a drive plate capable of being sleeved on the nut in a matching mode, a ratchet wheel matched with the outer ring of the drive plate and a drive plate fixed with the ratchet wheel, the operating end of the knob is positioned outside the support seat, the working end, Can control each digital hydraulic pump to work in sequence or synchronously and display and adjust the hydraulic pressure.
Furthermore, the digital hydraulic pump comprises a hydraulic pump, a hydraulic sensor for detecting hydraulic pressure, a feedback control and digital display unit, a network front end for establishing connection with the network control terminal, and a power supply module for supplying power.
Further, the network control terminal is connected with the digital hydraulic pump in a wireless networking mode.
Further, the network control terminal can control the digital hydraulic pump to stop when the hydraulic pressure exceeds the early warning value.
Furthermore, the outer ring of the drive plate is a fixed drive plate, the inner ring of the drive plate is a replaceable drive plate, the replaceable drive plate selects the corresponding size according to the size of the nut, and the fixed drive plate and the replaceable drive plate can not rotate relatively after being sleeved together.
The invention has the beneficial effects that:
when the bolt is stretched, a stretching nut is selected and matched according to the bolt, a drive plate is selected and matched according to the nut, a ratchet wheel is adjusted to a certain torsion according to the torsion required by the nut, then a support seat, a sleeve, the stretching nut, a fixed torsion component and a digital hydraulic pump are installed, then the digital hydraulic pump inputs corresponding hydraulic pressure according to the required pretightening force, the bolt is stretched in a fixed force mode through a piston and the stretching nut, then a knob is rotated, a drive plate drives the ratchet wheel to rotate, the drive plate is stirred by the ratchet wheel to rotate, the nut is screwed until the set torsion value is reached, the ratchet wheel sends a 'click' slip sound to prompt an operator that the nut is pre-tightened in a fixed force mode, if the nut needs to be stretched for multiple times, the operations of the fixed force stretching and the fixed force; because a plurality of bolts are stretched synchronously, the network control terminal is additionally arranged, the operation is convenient, the efficiency is high, and the synchronization effect is good.
The invention changes the process that the traditional manual driving lever dials the driving plate and then screws the nut into a ' rotating knob ', drives the ratchet wheel to rotate through the driving plate, and the ratchet wheel dials the driving plate to rotate and screws the nut ', realizes the constant force pre-tightening of the nut, performs constant force stretching on the bolt through the digital hydraulic pump controlled digitally, realizes the high-precision equivalent pressurization of the bolt, can adapt to the nuts and bolts with different specifications, and improves the screw dismounting precision, efficiency and convenience of major equipment by additionally arranging a network control terminal.
Drawings
Fig. 1 is a schematic structural diagram of a single high-precision hydraulic stretcher (without a network control terminal) in the embodiment of the invention.
Fig. 2 is a top view of a torsion determining assembly in an embodiment of the present invention.
Fig. 3 is a perspective view of fig. 2.
Fig. 4 is a partially enlarged view of fig. 2.
Fig. 5 is a schematic diagram of the connection between the network control terminal and the high-precision hydraulic stretcher in the embodiment of the invention.
In the figure: 1-a support seat; 2-a knob; 3-a transmission disc; 4-ratchet wheel; 5-fixing the drive plate; 6-replaceable dial; 7-a quick coupling; 8-stretching the nut; 9-a piston; 10-digital hydraulic pump; 11-a sleeve; 12-a hydraulic channel; 13-a feedback control and digital display unit; 14-network front end; 15-a power supply module; 16-a hydraulic pump; 17-hydraulic pressure sensor.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in fig. 1, a high-precision hydraulic stretcher comprises a supporting seat 1, a sleeve 11, a stretching nut 8, an annular piston 9, a digital hydraulic pump 10, a constant-torque assembly and a network control terminal; the support seat 1 can be sleeved outside a nut, the sleeve 11 supports the upper end of the support seat 1, the upper end of a stretching nut 8 is provided with a flange, the lower end of the stretching nut extends into the sleeve 11 and the support seat 1 and can be matched with a bolt (in threaded connection), the sleeve 11 is provided with a hydraulic channel 12, an inlet of the hydraulic channel 12 is positioned on the side surface of the sleeve 11, an outlet of the hydraulic channel 12 is positioned on the top surface of the sleeve 11 and is annular, the outlet of the hydraulic channel 12 is in sliding fit with a piston 9, the inlet is connected with a digital hydraulic pump 10 through a quick connector 7, the piston 9 can push up the flange when working, a torsion fixing component comprises a knob 2 arranged on the support seat 1, a drive plate capable of being matched with the nut, a ratchet 4 matched with the outer ring of the drive plate and a drive plate 3 fixed with the ratchet 4, an operation end of the knob 2 is positioned outside the support seat 1, a, And the network control terminal can be simultaneously connected with the digital hydraulic pumps 10 of the plurality of high-precision hydraulic stretchers in a networking manner, controls the digital hydraulic pumps 10 to work sequentially or synchronously and displays and adjusts the hydraulic pressure.
When the bolt is stretched, a stretching nut 8 is selected and matched according to the bolt, a drive plate is selected and matched according to the nut, a ratchet 4 is adjusted to a certain torsion according to the torsion required by the nut, a support seat 1, a sleeve 11, the stretching nut 8, a constant torsion component and a digital hydraulic pump 10 are installed, then the digital hydraulic pump 10 inputs corresponding hydraulic pressure according to the required pretightening force, the bolt is stretched in a constant force mode through a piston 9 and the stretching nut 8, a knob 2 is rotated, the drive plate 3 drives the ratchet 4 to rotate, the drive plate is pulled by the ratchet 4 to rotate, the nut is screwed until the set torsion value is reached, the ratchet 4 gives out a 'click' slip sound to prompt an operator that the nut is pre-tightened in a constant force mode, if the nut needs to be stretched for multiple times, the operations of constant force stretching and constant force pre-tightening are sequentially repeated; because a plurality of bolts are stretched synchronously, the network control terminal is additionally arranged, the operation is convenient, the precision and the efficiency are high, and the synchronization effect is good.
The process that the traditional manual driving lever toggles the driving plate and then screws the nut is changed into a process of turning the knob 2, the driving plate 3 drives the ratchet wheel 4 to rotate, the ratchet wheel 4 toggles the driving plate to rotate and screws the nut, constant-force pre-tightening of the nut is realized, constant-force stretching is carried out on the bolt through the digital hydraulic pump 10 which is digitally controlled, high-precision equivalent pressurization of the bolt is realized, the nut and the bolt which are different in specification can be adapted, and by additionally arranging the network control terminal, the operation is convenient, the precision and the efficiency are high, and the synchronization effect is good.
As shown in fig. 2 to 4, in the present embodiment, the outer ring of the dial is a fixed dial 5, the inner ring is an exchangeable dial 6, the exchangeable dial 6 has a corresponding size according to the size of the nut, and the fixed dial 5 and the exchangeable dial 6 cannot rotate relative to each other after being sleeved together. The replaceable dial 6 can be replaced according to the size of the nut without replacing the entire dial.
As shown in fig. 5, in the present embodiment, the digital hydraulic pump 10 includes a hydraulic pump 16, a hydraulic sensor 17 for detecting hydraulic pressure, a feedback control and digital display unit 13, a network front end 14 for establishing connection with a network control terminal, and a power supply module 15 for supplying power. The feedback control and digital display unit 13 quantifies the mechanical dial into specific numerical values, and reduces various errors.
As shown in fig. 5, in the present embodiment, the network control terminal is wirelessly connected to the digital hydraulic pump 10 (e.g., bluetooth connection). And a wireless connection mode is adopted, so that the operation is convenient and safe.
In this embodiment, the network control terminal can control the digital hydraulic pump 10 to stop when the hydraulic pressure exceeds the warning value. And corresponding early warning values are set according to different conditions, so that the damage to the bolts and equipment is prevented.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (5)
1. A high accuracy hydraulic stretcher which characterized in that: the device comprises a supporting seat, a sleeve, a stretching nut, an annular piston, a digital hydraulic pump, a constant torque component and a network control terminal; the support seat can be sleeved outside the nut, the sleeve is supported and sleeved on the upper end of the support seat, the upper end of the stretching nut is provided with a flange, the lower end of the stretching nut extends into the sleeve and the support seat and can be matched with the bolt, a hydraulic channel is arranged on the sleeve, an inlet of the hydraulic channel is positioned on the side surface of the sleeve, an outlet of the hydraulic channel is positioned on the top surface of the sleeve and is annular, the outlet of the hydraulic channel is in sliding fit with the piston, the inlet of the hydraulic channel is connected with the digital hydraulic pump through a quick connector, the flange can be pushed up when the piston works, the constant torque component comprises a knob arranged on the support seat, a drive plate which can be sleeved on the nut in a matching mode, a ratchet wheel matched with the outer ring of the drive plate and a drive plate fixed with the ratchet wheel, the operating end of the knob is positioned outside the support seat, the working end of the drive, And controlling the digital hydraulic pumps to work synchronously and displaying and adjusting the hydraulic pressure.
2. The high precision hydraulic tensioner as set forth in claim 1, wherein: the digital hydraulic pump comprises a hydraulic pump, a hydraulic sensor for detecting hydraulic pressure, a feedback control and digital display unit, a network front end for establishing connection with a network control terminal, and a power supply module for supplying power.
3. The high precision hydraulic tensioner as claimed in claim 1 or 2, wherein: and the network control terminal is connected with the digital hydraulic pump in a wireless networking manner.
4. The high precision hydraulic tensioner as set forth in claim 1, wherein: the network control terminal can control the digital hydraulic pump to stop when the hydraulic pressure exceeds the early warning value.
5. The high precision hydraulic tensioner as set forth in claim 1, wherein: the outer ring of the drive plate is a fixed drive plate, the inner ring of the drive plate is a replaceable drive plate, the replaceable drive plate selects a corresponding size according to the size of the nut, and the fixed drive plate and the replaceable drive plate are sleeved together and cannot rotate relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911155289.3A CN110900506B (en) | 2019-11-22 | 2019-11-22 | High-precision hydraulic stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911155289.3A CN110900506B (en) | 2019-11-22 | 2019-11-22 | High-precision hydraulic stretcher |
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| Publication Number | Publication Date |
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| CN110900506A true CN110900506A (en) | 2020-03-24 |
| CN110900506B CN110900506B (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911155289.3A Active CN110900506B (en) | 2019-11-22 | 2019-11-22 | High-precision hydraulic stretcher |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076205A (en) * | 2022-06-22 | 2022-09-20 | 东方电气风电股份有限公司 | Novel bolt anti-loosening method applied to oil immersion environment of wind generating set |
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| CN201102227Y (en) * | 2007-08-23 | 2008-08-20 | 上海电机学院 | Integral hydraulic drawing device |
| CN201128128Y (en) * | 2007-12-28 | 2008-10-08 | 中铁二局股份有限公司 | Quick-speed torque wrench |
| CN201524901U (en) * | 2009-09-24 | 2010-07-14 | 大连交通大学 | Novel bolt stretching machine |
| CN104916210A (en) * | 2015-05-25 | 2015-09-16 | 中广核核电运营有限公司 | Bolt fastening demonstration apparatus and bolt fastening parameter display method |
| CN104959441A (en) * | 2015-07-03 | 2015-10-07 | 成都海光核电技术服务有限公司 | Combined type integrated drawing machine of king bolt reactor pressure vessel and use method thereof |
| CN206677855U (en) * | 2017-04-12 | 2017-11-28 | 内蒙古久和能源装备有限公司 | Can automatic locking nut hydraulic elongator |
| DE102016008087A1 (en) * | 2016-07-01 | 2018-01-04 | Wolfgang Baron | Device combination for the metered forwarding of a coupling medium in a coupling medium contact chamber, an ultrasound generating screwing tool, for prestressing force controlled screwing in series production |
| DE102016113196A1 (en) * | 2016-07-18 | 2018-01-18 | Frank Hohmann | Digital thread engagement measurement |
| CN109421015A (en) * | 2017-08-28 | 2019-03-05 | 约尔格·霍曼 | The method of make-up or fastening for having been recorded to threaded connector |
| WO2019197431A1 (en) * | 2018-04-13 | 2019-10-17 | Cma Cgm | Manual tightening/loosening tool having a toothed pinion and pawls for a stretching screw |
-
2019
- 2019-11-22 CN CN201911155289.3A patent/CN110900506B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201102227Y (en) * | 2007-08-23 | 2008-08-20 | 上海电机学院 | Integral hydraulic drawing device |
| CN201128128Y (en) * | 2007-12-28 | 2008-10-08 | 中铁二局股份有限公司 | Quick-speed torque wrench |
| CN201524901U (en) * | 2009-09-24 | 2010-07-14 | 大连交通大学 | Novel bolt stretching machine |
| CN104916210A (en) * | 2015-05-25 | 2015-09-16 | 中广核核电运营有限公司 | Bolt fastening demonstration apparatus and bolt fastening parameter display method |
| CN104959441A (en) * | 2015-07-03 | 2015-10-07 | 成都海光核电技术服务有限公司 | Combined type integrated drawing machine of king bolt reactor pressure vessel and use method thereof |
| DE102016008087A1 (en) * | 2016-07-01 | 2018-01-04 | Wolfgang Baron | Device combination for the metered forwarding of a coupling medium in a coupling medium contact chamber, an ultrasound generating screwing tool, for prestressing force controlled screwing in series production |
| DE102016113196A1 (en) * | 2016-07-18 | 2018-01-18 | Frank Hohmann | Digital thread engagement measurement |
| CN206677855U (en) * | 2017-04-12 | 2017-11-28 | 内蒙古久和能源装备有限公司 | Can automatic locking nut hydraulic elongator |
| CN109421015A (en) * | 2017-08-28 | 2019-03-05 | 约尔格·霍曼 | The method of make-up or fastening for having been recorded to threaded connector |
| WO2019197431A1 (en) * | 2018-04-13 | 2019-10-17 | Cma Cgm | Manual tightening/loosening tool having a toothed pinion and pawls for a stretching screw |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076205A (en) * | 2022-06-22 | 2022-09-20 | 东方电气风电股份有限公司 | Novel bolt anti-loosening method applied to oil immersion environment of wind generating set |
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| Publication number | Publication date |
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| CN110900506B (en) | 2021-05-18 |
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