CN102756266A - Hydraulic tensioner with safe pressure relief device - Google Patents
Hydraulic tensioner with safe pressure relief device Download PDFInfo
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- CN102756266A CN102756266A CN2011101052391A CN201110105239A CN102756266A CN 102756266 A CN102756266 A CN 102756266A CN 2011101052391 A CN2011101052391 A CN 2011101052391A CN 201110105239 A CN201110105239 A CN 201110105239A CN 102756266 A CN102756266 A CN 102756266A
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- line segment
- hydraulic
- pressure relief
- relief device
- hydraulic jack
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Abstract
The invention relates to a hydraulic tensioner with a safe pressure relief device, comprising a hydraulic oil cylinder, a piston, and a tensioning piece, wherein the piston is arranged in the hydraulic oil cylinder, the tensioning rod of the tensioning piece is arranged in a through hole at the centre of the piston, and is limited via a tensioning head. As one or more limit grooves are arranged on the inner wall close to the top, of the hydraulic oil cylinder, when the pressure in the hydraulic oil cylinder exceeds a set value, a second sealing ring on the piston is pushed to the limit groove, and high-pressure oil overflows via the limit groove, so that the pressure of the oil in the hydraulic oil cylinder is reduced and automatically relieved; and via the plurality of limit grooves, many times of the automatic pressure relief can be realized, so that the hydraulic tensioner is safer and more reliable.
Description
Technical field
The present invention relates to a kind of hydraulic elongator, particularly a kind of hydraulic elongator that has safe pressure relief device.
Background technology
The operation principle of hydraulic elongator is in hydraulic jack, to inject hydraulic oil promotion piston bolt is applied external force; The bolt of the power of being applied in is elongated in its elastic deformation area; Diameter of bolt micro-deformation, thus make nut be easy to become flexible, further realize the fastening of bolt or dismounting.In the course of work, hydraulic elongator itself and component of machine are produced harmful effect if the hydraulic jack internal pressure is crossed conference.
The patent No. is that 200720075108.2 Chinese utility model patent discloses a kind of hydraulic elongator that has overload protection arrangement; The major technique piston is provided with and is interconnected, connects macropore and following aperture on the piston upper and lower surfaces; In the last macropore of aperture upper end steel ball, the spring axis of guide, sliding sleeve, compression spring and hexagonal socket nut are set in order from the bottom to top under being close to and constitute overload protection arrangement; Said steel ball is sealed the said open upper end of aperture down; When the pressure in the hydraulic cylinder surpassed setting value, the steel ball by the compression spring compression in the overload protection arrangement was backed down by the hydraulic oil of over pressure value, and hydraulic oil overflows through the hole of sliding sleeve and hexagonal socket nut; Oil pressure in the hydraulic jack is descended, thereby pretension bolt is carried out overload protection.Since need be on piston separately the accurate micropore of processing dimension, with the screw thread of said hexagonal socket nut coupling, the making of steel ball, the spring axis of guide, sliding sleeve, compression spring and hexagonal socket nut in addition, also more complicated is installed, cost of manufacture is high.
Summary of the invention
In order to solve prior art complex structure, problem that cost of manufacture is high; The present invention provides a kind of simple in structure, easy to operate, the hydraulic elongator that has safe pressure relief device that can realize prompting manual pressure release and the multiple insurance function of releasing pressure automatically, and the technical scheme that is adopted is:
A kind of hydraulic elongator that has safe pressure relief device; Comprise hydraulic jack, piston, tensioning member; Said piston is arranged in the said hydraulic jack; The stretch of said tensioning member is arranged in the through hole of said centre, and spacing through stretching head, on the inwall of said hydraulic jack near the top one or more stopper slot is set.
Said stopper slot place scribbles luminous paint.
Said hydraulic jack is the ramp structure of an opening near the inwall at top.
Said stopper slot is positioned on the said slope, and said stopper slot is a ring-type, and the quantity of said stopper slot is 2.
The face adapted of the outer wall of said hydraulic jack inwall and the said piston curved-surface structure that to be a N shape multistage line obtain around the central shaft rotation of said hydraulic elongator; Said N shape multistage line comprise from the bottom to top be parallel to upwardly extending first line segment of said central shaft, perpendicular to the second outside line segment of said central shaft, with said central shaft be 5 °～45 ° angles downwards outward extending the 3rd line segment, perpendicular to outside the 4th line segment of said central shaft and be parallel to upwardly extending the 5th line segment of said central shaft; Said the 4th line segment upper extreme point is higher than the said first line segment upper extreme point, and said the 4th line segment lower extreme point is higher than the said first line segment lower extreme point.
The position of corresponding said the 5th the above the hydraulic jack inwall of line segment upper extreme point in said slope.
The corresponding said first line segment upper end of said hydraulic jack inwall is provided with annular oil groove; The corresponding said first line segment place below the said annular oil groove is stated the hydraulic jack inwall first hermetically-sealed construction is set, and corresponding said the 4th line segment place is stated piston outer wall second hermetically-sealed construction is set.
Said first hermetically-sealed construction is identical with said second hermetically-sealed construction, includes the support ring and the sealing ring that are provided with in groove and the groove.
Said support ring is L shaped; One end of the radial section respective slot opening of said L shaped support ring is a semicircular structure; Said sealing ring is the O RunddichtringO, and said sealing ring is arranged on the knuckle inboard of said L shaped support ring, and said sealing ring protrudes in said slot opening place.
Said hydraulic jack bottom is provided with an oil filler point, and a snap joint is installed in said oil filler point opening part.
Technique effect:
A kind of hydraulic elongator that has safe pressure relief device of the present invention comprises hydraulic jack, piston, tensioning member, and piston is arranged in the hydraulic jack, and the stretch of tensioning member is arranged in the through hole of centre, and spacing through stretching head.Wherein, Owing on the inwall of hydraulic jack, one or more stopper slot is set near the top; When the pressure in the hydraulic cylinder surpassed setting value, second sealing ring on the piston was carried out to the stopper slot place, and the stopper slot that hydraulic oil passes through overflows; Make the oil pressure in the hydraulic jack descend releasing pressure automatically; A plurality of stopper slots can be realized repeatedly releasing pressure automatically, and are more safe and reliable.
In addition, the stopper slot place scribbles the outstanding demonstration of luminous paint, constitutes safety instruction line and security warning line; When releasing pressure automatically lost efficacy, piston continued upwards to carry out, when safety instruction line or security warning line are capped; Prompting operation person's piston has walked to range, should in time carry out manual pressure release.
Hydraulic jack is the ramp structure of an opening near the inwall at top, is convenient to the state that the operator observes sealing ring, thereby infers piston stroke indirectly, and is easy to operate, safe and reliable when having guaranteed the operation of stretcher installing/dismounting.
The face adapted of the outer wall of hydraulic jack inwall and the piston curved-surface structure that to be a N shape multistage line obtain around the central shaft rotation of hydraulic elongator; N shape multistage line comprise from the bottom to top be parallel to upwardly extending first line segment of central shaft, perpendicular to the second outside line segment of central shaft, with central shaft be 5 °～45 ° angles downwards outward extending the 3rd line segment, perpendicular to outside the 4th line segment of central shaft and be parallel to upwardly extending the 5th line segment of central shaft; The 4th line segment upper extreme point is higher than the first line segment upper extreme point, and the 4th line segment lower extreme point is higher than the first line segment lower extreme point.Particular structure makes the overall structure of piston and hydraulic jack more stable, and the angle that can adapt to any direction 3 degree tilts, and can not cause the loss of pulling force.
The corresponding first line segment upper end of hydraulic jack inwall is provided with annular oil groove, and the corresponding first line segment place hydraulic jack inwall below the annular oil groove is provided with first hermetically-sealed construction, and corresponding the 4th line segment place piston outer wall is provided with second hermetically-sealed construction, guarantees the hydraulic oil sealing.
Because support ring is L shaped; One end of the radial section respective slot opening of L shaped support ring is a semicircular structure, and sealing ring is the O RunddichtringO, substitutes the plane with curved surface; Can reduce the frictional force between the contact-making surface, can prevent simultaneously sealing ring relative rolling, avoid the spiral shell morpheme to move; Sealing ring is arranged on the knuckle inboard of L shaped support ring, and sealing ring protrudes in the slot opening place, sealing ring antagonism compressional deformation sealed hydraulic oil zone.
Accompanying drawing
Accompanying drawing 1 has the structural representation of the hydraulic elongator of safe pressure relief device for the present invention.
Sign in the accompanying drawing is respectively:
The 100-hydraulic jack, 101-oil filler point, 102-first stopper slot, 103-second stopper slot, 104-first groove, 1041-first support ring; 1042-first sealing ring, 105-slope, 106-annular oil groove, 200-piston, 201-second groove, 2011-second support ring; 2012-second sealing ring, 300-tensioning member, 301-stretching head, 302-stretch, 400-supporting bridge; The 500-nut, the 600-bolt, 700-snap joint, the 800-ring, 900-is by joining work pieces.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 1; The hydraulic elongator that the present invention has safe pressure relief device comprises hydraulic jack 100, piston 200, tensioning member 300, supporting bridge 400, snap joint 700, ring 800; Supporting bridge 400 is arranged on by joining work pieces 900 surfaces, and hydraulic jack 100 is fixed on the supporting bridge 400.Piston 200 is socketed in the hydraulic jack 100, and the internal structure of the external structure of piston 200 and hydraulic jack 100 is complementary, and piston 200 centers are provided with through hole.The stretching head 301 of tensioning member 300 is arranged on the upper surface of piston 200, and stretch 302 is arranged in the through hole of piston 200, and the external diameter of the internal diameter of stretch 302 and bolt 600 is suitable, and tightly is enclosed within on the bolt 600 through screw thread.The bottom of hydraulic jack 100 is provided with oil filler point 101, and oil filler point 101 is a through hole, and snap joint 700 is installed in the outside of oil filler point 101.Ring 800 is arranged on the sidewall of supporting bridge 400, and the position is corresponding with the installation site of nut 500.
The face adapted of the outer wall of hydraulic jack 100 inwalls and piston 200 curved-surface structure that to be a N shape multistage line obtain around the central shaft rotation of hydraulic elongator; Said N shape multistage line comprise from the bottom to top be parallel to upwardly extending first line segment of said central shaft, perpendicular to the second outside line segment of said central shaft, with said central shaft be 5 °～45 ° angles downwards outward extending the 3rd line segment, perpendicular to outside the 4th line segment of said central shaft and be parallel to upwardly extending the 5th line segment of said central shaft; Said the 4th line segment upper extreme point is higher than the said first line segment upper extreme point, and said the 4th line segment lower extreme point is higher than the said first line segment lower extreme point.This unique design allows the hydraulic elongator inclination within 3 degree in any direction, and can not cause the loss of pulling force, and the overall structure that piston 200 and hydraulic jack 100 are agreed with is more stable.
Locating more than corresponding said the 5th line segment upper extreme point of inwall of hydraulic jack 100 near the top is slope 105 structures of an opening; Slope 105 is provided with two annular spacing grooves; Be followed successively by first stopper slot 102 and second stopper slot 103 from the bottom to top; First stopper slot, 102 places scribble luminous paint and form the first safety instruction line, and second stopper slot, 103 places also scribble luminous paint and constitute the second security warning line.
The corresponding said first line segment upper end of hydraulic jack 100 inwalls is provided with annular oil groove 106; Annular oil groove corresponding said first line segment place hydraulic jack 100 inwalls below 106 are provided with first hermetically-sealed construction, and corresponding said the 4th line segment place piston 200 outer walls are provided with second hermetically-sealed construction.
Said first hermetically-sealed construction comprises first support ring 1041 and first sealing ring 1042 that is provided with in first groove 104 and first groove 104; First support ring 1041 is L shaped; The knuckle of first support ring 1041 is close to the 104 inferior horn settings of first groove, and first sealing ring 1042 is arranged on the knuckle inboard of first pushing out ring 1041; Said second hermetically-sealed construction comprises second support ring 2011 and second sealing ring 2012 that is provided with in second groove 201 and second groove 201; Second support ring 2011 is L shaped; The knuckle of L shaped second support ring 2011 is close to angle setting on second groove 201, and second sealing ring 2012 is arranged on the knuckle inboard of second pushing out ring 2011.
The end that the radial section of L shaped first support ring 1041 contacts with piston 200 outer walls is a semicircular structure; First sealing ring 1042 is the O RunddichtringO; The end that the radial section of L shaped second support ring 2011 contacts with hydraulic jack 100 inwalls is a semicircular structure, and second sealing ring 2012 is the O RunddichtringO.This Seal Design not only can reduce the frictional force between hydraulic jack 100 and piston 200 lateral walls, can prevent that the relative hydraulic jack 100 of sealing ring from rolling, avoiding the spiral shell morpheme to move simultaneously.
First sealing ring 1042 protrudes in first groove, 104 opening parts, and second sealing ring 2012 protrudes in second groove, 201 opening parts.
Hydraulic jack 100 bottoms are provided with an oil filler point 101, one snap joints 700 and are installed in oil filler point 101 opening parts.
During work; Hydraulic oil single pass snap joint 700, oil filler point 101 inject the inner chamber of hydraulic jack 100; Promote piston 200 and move up, 302 pairs of bolts 600 apply active force upwards thereby piston 200 promotes stretching head 301 drive stretch, and bolt 600 is elongated; Make nut 500 and, be convenient to further stir ring 800 fastening or demounting bolts 600 by loosening relatively between the joining work pieces 900.
Along with the continuous injection of hydraulic oil, hydraulic jack 100 chamber pressures increase gradually, promote piston 200 and move up, and second sealing ring 2012 that is provided with on the piston 200 also moves up with respect to hydraulic jack 100 inwalls.When second sealing ring 2012 moves the lower limb that reaches slope 105; The operator can observe the deformation of second sealing ring 2012 through the angle of inclination on slope 105; Infer the stroke of piston 200 according to the deformation of second sealing ring 2012, easy to operate, safe and reliable when guaranteeing the hydraulic elongator operation.
When hydraulic jack 100 chamber pressures continuation increase, when second sealing ring 2012 was passed to first stopper slot, 102 places, hydraulic oil just overflowed through the space at first stopper slot, 102 places, carries out the releasing pressure automatically first time; First stopper slot, 102 places scribble eye-catching luminous paint, constitute the first safety instruction line, and when the releasing pressure automatically inefficacy first time, hydraulic oil did not have the first safety instruction line, and this moment, just prompting operation person carried out manual pressure release.When the first time releasing pressure automatically lost efficacy and operating personnel do not implement manual pressure release, when second sealing ring 2012 continued upwards to pass to second stopper slot, 103 places, hydraulic oil just overflowed through the space at second stopper slot, 103 places, carries out the releasing pressure automatically second time; Second stopper slot, 103 places scribble eye-catching luminous paint, constitute the second security warning line, and when the releasing pressure automatically inefficacy second time, hydraulic oil did not have the second security warning line, and just warn the operator and carry out manual pressure release this moment.The present invention has avoided taking place owing to hydraulic jack 100 internal pressures continue to increase the accident that causes through twice releasing pressure automatically, this quadruple insurance of the manual pressure release of twice prompting effectively.
Should be understood that; The above specific embodiment can make those skilled in the art more fully understand the invention; But do not limit the present invention in any way creation; All do not break away from the technical scheme and the improvement thereof of the spirit and the scope of the invention, and it all is encompassed in the middle of the protection domain of the invention patent.
Claims (10)
1. hydraulic elongator that has safe pressure relief device; Comprise hydraulic jack, piston, tensioning member; Said piston is arranged in the said hydraulic jack, and the stretch of said tensioning member is arranged in the through hole of said centre, and spacing through stretching head; It is characterized in that, on the inwall of said hydraulic jack near the top one or more stopper slot is set.
2. a kind of hydraulic elongator that has safe pressure relief device as claimed in claim 1 is characterized in that said stopper slot place scribbles luminous paint.
3. a kind of hydraulic elongator that has safe pressure relief device as claimed in claim 1 is characterized in that, said hydraulic jack is the ramp structure of an opening near the inwall at top.
4. a kind of hydraulic elongator that has safe pressure relief device as claimed in claim 3 is characterized in that said stopper slot is positioned on the said slope, and said stopper slot is a ring-type, and the quantity of said stopper slot is 2.
5. a kind of hydraulic elongator that has safe pressure relief device according to claim 1; It is characterized in that; The face adapted of the outer wall of said hydraulic jack inwall and the said piston curved-surface structure that to be a N shape multistage line obtain around the central shaft rotation of said hydraulic elongator; Said N shape multistage line comprise from the bottom to top be parallel to upwardly extending first line segment of said central shaft, perpendicular to the second outside line segment of said central shaft, with said central shaft be 5 °～45 ° angles downwards outward extending the 3rd line segment, perpendicular to outside the 4th line segment of said central shaft and be parallel to upwardly extending the 5th line segment of said central shaft; Said the 4th line segment upper extreme point is higher than the said first line segment upper extreme point, and said the 4th line segment lower extreme point is higher than the said first line segment lower extreme point.
6. according to claim 3 or 5 described a kind of hydraulic elongators that have safe pressure relief device, it is characterized in that the position of corresponding said the 5th the above the hydraulic jack inwall of line segment upper extreme point in said slope.
7. a kind of hydraulic elongator that has safe pressure relief device according to claim 5; It is characterized in that; The corresponding said first line segment upper end of said hydraulic jack inwall is provided with annular oil groove; The corresponding said first line segment place below the said annular oil groove is stated the hydraulic jack inwall first hermetically-sealed construction is set, and corresponding said the 4th line segment place is stated piston outer wall second hermetically-sealed construction is set.
8. a kind of hydraulic elongator that has safe pressure relief device according to claim 7 is characterized in that, said first hermetically-sealed construction is identical with said second hermetically-sealed construction, includes the support ring and the sealing ring that are provided with in groove and the groove.
9. a kind of hydraulic elongator that has safe pressure relief device according to claim 8; It is characterized in that; Said support ring is L shaped, and an end of the radial section respective slot opening of said L shaped support ring is a semicircular structure, and said sealing ring is the O RunddichtringO; Said sealing ring is arranged on the knuckle inboard of said L shaped support ring, and said sealing ring protrudes in said slot opening place.
10. a kind of hydraulic elongator that has safe pressure relief device as claimed in claim 1 is characterized in that, said hydraulic jack bottom is provided with an oil filler point, and a snap joint is installed in said oil filler point opening part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101052391A CN102756266A (en) | 2011-04-26 | 2011-04-26 | Hydraulic tensioner with safe pressure relief device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101052391A CN102756266A (en) | 2011-04-26 | 2011-04-26 | Hydraulic tensioner with safe pressure relief device |
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| Publication Number | Publication Date |
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| CN102756266A true CN102756266A (en) | 2012-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101052391A Pending CN102756266A (en) | 2011-04-26 | 2011-04-26 | Hydraulic tensioner with safe pressure relief device |
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| CN (1) | CN102756266A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107377650A (en) * | 2017-09-13 | 2017-11-24 | 大连康丰科技有限公司 | Continuous extruder hydraulic nut assembly with active safety protection |
| CN112045203A (en) * | 2020-08-25 | 2020-12-08 | 浙江斯特隆科技有限公司 | Transfer arm with angle modulation |
| 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 |
-
2011
- 2011-04-26 CN CN2011101052391A patent/CN102756266A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107377650A (en) * | 2017-09-13 | 2017-11-24 | 大连康丰科技有限公司 | Continuous extruder hydraulic nut assembly with active safety protection |
| CN112045203A (en) * | 2020-08-25 | 2020-12-08 | 浙江斯特隆科技有限公司 | Transfer arm with angle modulation |
| CN112045203B (en) * | 2020-08-25 | 2023-06-09 | 浙江斯特隆科技有限公司 | Mould moving arm with angle adjustment |
| 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 |
| CN113649977B (en) * | 2021-10-19 | 2021-12-14 | 江苏华恩机械科技有限公司 | Split type general type high accuracy hydraulic stretcher |
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Legal Events
| Date | Code | Title | Description |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121031 |