CN106624760A - Overtravel alarming and resetting stretcher and stretching method thereof - Google Patents
Overtravel alarming and resetting stretcher and stretching method thereof Download PDFInfo
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- CN106624760A CN106624760A CN201611266929.4A CN201611266929A CN106624760A CN 106624760 A CN106624760 A CN 106624760A CN 201611266929 A CN201611266929 A CN 201611266929A CN 106624760 A CN106624760 A CN 106624760A
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- overtravel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P19/00—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes
- B23P19/04—Machines for simply fitting together or separating metal parts or objects, or metal and non-metal parts, whether or not involving some deformation; Tools or devices therefor so far as not provided for in other classes for assembling or disassembling parts
- B23P19/06—Screw or nut setting or loosening machines
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Abstract
The invention discloses an overtravel alarming and resetting stretcher and a stretching method of the overtravel alarming and resetting stretcher and belongs to the technical field of stretchers. The overtravel alarming and resetting stretcher comprises a base, a connector, an oil cylinder, a piston, a pull rod and an end cover. The base is located on the lower portion of the oil cylinder. The pull rod is arranged inside the oil cylinder. The piston is arranged in the radial direction of the oil cylinder and the pull rod and matched with the oil cylinder and the pull rod. The end cover is arranged on the upper surface of the oil cylinder. Springs are evenly arranged between the end cover and the piston. The connector communicates with the oil cylinder and located on the outer portion of the oil cylinder. The overtravel alarming and resetting stretcher further comprises an alarming switch, an elastic paster and a gearbox, wherein the alarming switch is located inside the end cover, the elastic paster is located on the lower surface of the end cover and located on the same straight line with the alarming switch, the gearbox is in contact with a pre-load nut in the base. The alarming switch comprises an LED lamp bead and a button cell, wherein the LED lamp bead, a buzzer, the button cell and the elastic paster are sequentially connected in series. The overtravel alarming and resetting stretcher aims to solve the problem that in the prior art, after a stretcher exceeds a travel, the stretcher is prone to damage, and the overtravel alarming and resetting stretcher can achieve overtravel reminding and is protected against damage caused by overtravel.
Description
Technical field
The present invention relates to nut pretension field, more particularly to a kind of overtravel ann reset stretcher and its method.
Background technology
Bolts and nuts are that mechanical field assembles indispensable parts, and the fixed form of bolts and nuts is more solid than other
Determine mode more firm, more reliable, thus become the most frequently used mode that two or more parts are fixed together.Due to
The bolt that some main equipments are adopted is thicker, and its pretightning force is very big, if what the fastening of bolt and dismounting were completed by manually
Words, labour intensity is very high.Further, since connection between part needs several, more than ten or even tens bolts to realize, manually
Bolt is fastened successively and dismantled, the stress distribution of each link position can be caused uneven, so as to affect connector
Intensity.
Hydraulic elongator has respective stroke range, if overtravel work, can cause seal and zero in stretcher
Parts damages.And the overtravel protection of stretcher at present is typically all that a warning line is carved on pull bar or piston, work as operative employee
When people sees warning line, just quit work.This quadrat method is bothered very much, needs workman to note warning line all the time,
And slightly do not notice that stretcher will overtravel in practical operation.Meanwhile, if multiple stage bolt tensioning jack works simultaneously, workman is very
Easily attend to one thing and lose sight of another, stretcher is easily damaged.
Chinese utility model patent, publication number：204935055U, publication date：2016-01-06, discloses a kind of overtravel
The stretcher of automatic protection, it includes base, joint, oil cylinder, piston, pull bar, end cap, and base and oil cylinder are vertically connected with, pull bar
It is arranged in oil cylinder, in the piston that is engaged with both of which of being radially arranged of oil cylinder and pull bar, pull bar and piston ladder is
Shape, is provided with warning-sign wire casing on pull bar, end cap is fixed in above oil cylinder, and it also includes overflow mechanism and big spring；End cap, drawing
Bar, piston, oil cylinder formed a closed cavity, in this cavity arrange one enclose big spring, any two big springs it
Between arrange an overflow mechanism.Wherein, overflow mechanism includes blocking, little spring, steel ball and push rod.It is disadvantageous in that, when
When stretching reaches design runlength, ejector pin contact has arrived end cap, produces a downward power and backs down steel ball, makes the oil spill in oil cylinder
Stream, piston is no longer moved upwards, because the stretcher commonly used is to separate design with pumping plant, after stretcher overtravel, again
Need pumping plant to pass through joint during using stretcher and pressurize oiling into stretcher again so that stretcher can be played stretches again
Effect, in view of pumping plant and stretcher are split-type designs, and pumping plant volume ratio is heavier, and again fuel feeding brings inconvenience,
And reduce operating efficiency.
The content of the invention
1. the invention technical problem to be solved
It is flimsy for there are problems that after the stretcher overtravel of prior art, the invention provides a kind of overtravel report
Alert reset stretcher and its method.It can realize that stretcher overtravel is reminded, and protect stretcher not damaged by overtravel.
2. technical scheme
To solve the above problems, the technical scheme that the present invention is provided is：
A kind of overtravel ann reset stretcher, including base, joint, oil cylinder, piston, pull bar and end cap, base is located at
Oil cylinder bottom, pull bar is arranged in oil cylinder, and in the piston that is engaged with both of which of being radially arranged of oil cylinder and pull bar, end cap exists
Oil cylinder upper surface, is uniformly provided with spring between end cap and piston, and joint is connected with oil cylinder, positioned at the outside of oil cylinder, is also included
Alarm switch and elastic patch, alarm switch is located in end cap, and elastic patch is electrically connected with alarm switch, positioned at cover internal table
On face, alarm switch, elastic patch and push rod one are on same straight line.Gear-box is contacted with the pre-load nut in base.
Preferably, described alarm switch include LED lamp bead, electronics, LED lamp bead, buzzer, electronics and elastic patch according to
Secondary series connection, the top of described elastic patch and push rod one is on same straight line.
Preferably, gear-box is located at the side of base, and described gear-box includes gear one, gear two and gear three, tooth
Wheel one, gear two and gear three are engaged successively, and the top of gear one is provided with bolt hole, and gear three connects with the pre-load nut in base
Touch.
Preferably, described end cap is provided with the through hole for accommodating alarm switch, and LED lamp bead, buzzer, electronics are from top to bottom
It is sequentially located in through hole, the top of LED lamp bead is higher than the top of end cap through hole.
Preferably, described elastic patch is made up of two panels flexure strip, original state, and two panels flexure strip is to separate up and down
State.
Preferably, the upper surface of piston is along the circumferential direction uniformly provided with groove, and spring one end is located in groove, and spring is another
End contacts with end cap.
Preferably, also including overflow mechanism, overflow mechanism includes blocking, spring one, steel ball and push rod one；Piston it is big straight
It is provided with the section of footpath in an axially disposed up-small and down-big ladder hole, macropore and is provided with blocking, spring one from the bottom up
And steel ball, push rod one is provided with aperture, the length of push rod one is slightly longer than the length of aperture.
A kind of drawing process of overtravel ann reset stretcher, comprises the following steps：
A, a kind of overtravel warning stretcher in accordance with the above, described alarm switch is sealed in the through hole of end cap
Interior, the bottom of pull bar is provided with the screwed hole matched with pretension bolt, and top and the end cap of pull bar match, which is provided with and hexagonal
The screw that track wrench matches, base is provided with the receiving space matched with pre-load nut；
B, pretension bolt pass through base, extend into the bottom of pull bar, and pre-load nut is placed in the receiving space of base,
Spanner with hex bolts is placed in the screw at the top of pull bar, and pretension bolt is screwed into rotary spanner the spiral shell of pull bar bottom
In pit；
C, joint is connected with pumping plant, after pumping plant is to the oil pressurization in fuel tank, is passed in oil cylinder, piston is under pressure work
With moving upwards；
D, piston pushing drawing rod are moved upwards, and pull bar pulls pretension bolt to move upwards；
E, according to the pressure dependence of the specification size and tensile force and piston of pre-load nut and pretension bolt, on observation pumping plant
Pressure gauge when reaching the pressure value matched with the specification size of pre-load nut and pretension bolt, that is, reach the stroke of design
Afterwards, stop being refueled into fuel tank, piston self-return under spring tension makes hydraulic oil be back in pumping plant；
F, due to maloperation, when pumping plant refuels excessive into fuel tank, i.e., piston to pull bar force it is excessive when, pull bar pull
Pretension bolt moves past upwards limit value, and the warning-sign wire casing on pull bar reaches end cap upper surface, and push rod one extend into end
Lid touches first elastic patch, and two flexure strips up and down of elastic patch contact so that elastic patch and alarm switch structure
Into series connection circuit ON, buzzer sounds the alarm, and LED lamp bead is glittering, reminds stretcher overtravel, stops pumping plant and fuel tank is added
Oil；
If G, pumping plant continue to refuel fuel tank, push rod one is subject to the drag effect of elastic patch, produce one it is downward
Power backs down steel ball, makes in the space that hydraulic oil overflow in oil cylinder formed to end cap and pull bar, and hydraulic oil pressure release, piston stops
Move upwards, piston self-return under spring tension makes hydraulic oil be back in pumping plant.
Preferably, the step of tightening pre-load nut in step C be：Spanner is placed in the bolt hole at the top of gear one,
Rotary spanner, gear one operates, and moves with the meshed gears two of gear one, moves with the meshed gears three of gear two, and then band
Pre-load nut motion in the dynamic base contacted with gear three.
A kind of installation method of stretcher, comprises the following steps：
A, a kind of stretcher in accordance with the above；
B, sealing ring is respectively charged on piston and oil cylinder using specific purpose tool；
C, piston is pressed in oil cylinder using uniform force；
D, pull bar is inserted in piston；
E, spring is respectively put in the groove of piston face；
F, end cap and oil cylinder are tightened using fixing screws；
G, by gear-box be arranged on pull bar bottom；Pulling sleeve is used to rotate pre-load nut；
H, by floor installation below oil cylinder.
3. beneficial effect
The technical scheme provided using the present invention, compared with prior art, is had the advantages that：
(1) a kind of stretcher of the invention, alarm switch is located in end cap, elastic patch be located at end cap lower surface, with
Alarm switch during stretching, after ejector pin contact to elastic patch, starts the buzzing of alarm switch on same straight line
Device and LED, LED is glittering, buzzer call, reminds operating personnel to note stretcher overtravel；
(2) a kind of stretcher of the invention, plays alarm function, from vision by the buzzer and LED of alarm switch
Acoustically remind operating personnel to note stretcher overtravel, further ensure that stretcher is not damaged by；
(3) a kind of stretcher of the invention, after alarm switch sends overtravel alarm, if continuing to operate, overflow dress
Put and play a part of overtravel reset, stretcher is played a protective role, prevent spring stress excessive, damage end cap；
(4) a kind of drawing process of stretcher of the invention, pull bar is played to drawing in the millet straw of stretching using three lines of defence
The effect of device overtravel position limitation protection is stretched, first with the warning function of warning line, then using the buzzer in alarm switch
Operating personnel are further reminded to note stretcher overtravel with LED lamp bead, finally using the overtravel reset function of overflow mechanism
Play the protective effect to stretcher.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the gear box structure schematic diagram of the present invention.
Label declaration in schematic diagram：
1st, base；2nd, joint；3rd, oil cylinder；4th, piston；5th, pull bar；6th, end cap；7th, spring.
Specific embodiment
To further appreciate that present disclosure, with reference to drawings and Examples, the present invention is described in detail.
A kind of overtravel ann reset stretcher, including base 1, joint 2, oil cylinder 3, piston 4, pull bar 5 and end cap 6, bottom
Seat 1 is located at the bottom of oil cylinder 3, and pull bar 5 is arranged in oil cylinder 3, is engaged with both of which in oil cylinder 3 and being radially arranged for pull bar 5
Piston 4, end cap 6 is uniformly provided with spring 7 in the upper surface of oil cylinder 3, between end cap 6 and piston 4, and the upper surface of piston 4 is along circle
Circumferential direction is uniformly provided with groove, and the one end of spring 7 is located in groove, and the other end of spring 7 contacts with end cap 6.Joint 2 and oil cylinder 3
Connection, positioned at the outside of oil cylinder 3, also including alarm switch 61 and elastic patch 13, alarm switch 61 is located in end cap 6, elasticity
Paster 13 is electrically connected with alarm switch 61, in the interior surface of end cap 6, alarm switch 61, elastic patch 13 and push rod 1
On same straight line, gear-box 14 is contacted with the pre-load nut in base 1.
Alarm switch 61 includes LED lamp bead, electronics, and LED lamp bead, buzzer, electronics and elastic patch are sequentially connected in series, described
Elastic patch and push rod 1 top on same straight line.End cap 6 is provided with the through hole for accommodating alarm switch 61, LED
Lamp bead, buzzer, electronics and SR are sequentially located at from top to bottom in through hole, and the top of LED lamp bead is higher than the through hole of end cap 6
Top.
Gear-box 14 is located at the side of base 1, and described gear-box 14 includes gear 1, gear 2 142 and gear three
143, gear 1, gear 2 142 and gear 3 143 are engaged successively, and the top of gear 1 is provided with bolt hole, gear 3 143
Contact with the pre-load nut in base 1.
Described elastic patch 13 is made up of two panels flexure strip, original state, and two panels flexure strip is upper and lower released state,
Two panels flexure strip in described elastic patch 13 is separately positioned on the both sides of the lower surface of through hole, upper and lower two flexure strips point
From.
Also include overflow mechanism, overflow mechanism includes blocking 8, spring 1, steel ball 10 and push rod 1；Piston 4 it is big straight
It is provided with the section of footpath in an axially disposed up-small and down-big ladder hole, macropore and is provided with blocking 8, spring one from the bottom up
9 and steel ball 10, push rod 1 is provided with aperture, the length of push rod 1 is slightly longer than the length of aperture.
A kind of drawing process of overtravel ann reset stretcher, comprises the following steps：
A, a kind of overtravel ann reset stretcher in accordance with the above, described alarm switch 61 is sealed in end cap 6
Through hole in, the bottom of pull bar 5 is provided with the screwed hole matched with pretension bolt, and top and the end cap 6 of pull bar 5 match, thereon
The screw matched with hexagon bolt wrench is provided with, base 1 is provided with the receiving space matched with pre-load nut；
B, pretension bolt pass through base 1, extend into the bottom of pull bar 5, and pre-load nut is placed on into the receiving space of base 1
Interior, the spanner with hex bolts is placed in the screw at the top of pull bar 5, and rotary spanner is screwed into pretension bolt under pull bar 5
In the screwed hole in portion；
The step of tightening pre-load nut be：Spanner is placed in the bolt hole at the top of gear 1, rotary spanner, tooth
One 141 operatings are taken turns, is moved with one 141 meshed gears of gear 2 142, moved with 2 142 meshed gears of gear 3 143, entered
And drive pre-load nut motion in the base 1 contacted with gear 3 143.
C, joint 2 is connected with pumping plant, after pumping plant is to the oil pressurization in fuel tank, is passed in oil cylinder 3, piston 4 is pressed
Power effect is moved upwards；
D, the pushing drawing rod 5 of piston 4 are moved upwards, and pull bar 5 pulls pretension bolt to move upwards；
E, according to the pressure dependence of the specification size and tensile force and piston 4 of pre-load nut and pretension bolt, observe pumping plant
On pressure gauge when reaching the pressure value matched with the specification size of pre-load nut and pretension bolt, that is, reach the stroke of design
Afterwards, stop being refueled into fuel tank 3, the self-return under the tension force effect of spring 7 of piston 4 makes hydraulic oil be back in pumping plant；
F, due to maloperation, when pumping plant refuels excessive into fuel tank 3, i.e., piston 4 to pull bar 5 exert a force excessive when, pull bar 5
Pretension bolt is pulled to move past limit value upwards, the warning-sign wire casing 12 on pull bar 5 reaches the upper surface of end cap 6, push rod one
11 extend into end cap touches first elastic patch 13, and two flexure strips up and down of elastic patch 13 contact so that elasticity patch
Piece 13 constitutes series circuit and connects with alarm switch 61, and buzzer sounds the alarm, and LED lamp bead is glittering, reminds stretcher to be out of the line
Journey, stops pumping plant and fuel tank 3 is refueled；
If G, pumping plant continue fuel tank 3 is refueled, push rod 1 be subject to elastic patch 13 drag effect, produce one to
Under power back down steel ball 10, make in the space that hydraulic oil overflow in oil cylinder formed to end cap 6 and pull bar 5, hydraulic oil pressure release,
Piston 4 stops moving upwards, the self-return under the tension force effect of spring 7 of piston 4, hydraulic oil is back in pumping plant.
A kind of installation method of stretcher, comprises the following steps：
A, a kind of stretcher in accordance with the above；
B, sealing ring is respectively charged on piston 4 and oil cylinder 3 using specific purpose tool；
C, piston 4 is pressed in oil cylinder 3 using uniform force；
D, pull bar 5 is inserted in piston 4；
E, spring 7 is respectively put in the groove on the surface of piston 4；
F, end cap 6 is tightened with oil cylinder 3 using fixing screws；
G, by gear-box be arranged on the bottom of pull bar 5；
H, by base 1 be arranged on oil cylinder 3 below.
Embodiment 1
With reference to Fig. 1-2, a kind of overtravel ann reset stretcher, including base 1, joint 2, oil cylinder 3, piston 4, pull bar 5
With end cap 6, base 1 is located at the bottom of oil cylinder 3, and pull bar 5 is arranged in oil cylinder 3, in being radially arranged and two for oil cylinder 3 and pull bar 5
The piston 4 that person is engaged, end cap 6 is uniformly provided with spring 7 in the upper surface of oil cylinder 3, between end cap 6 and piston 4, piston 4
Upper surface is along the circumferential direction uniformly provided with groove, and the one end of spring 7 is located in groove, and the other end of spring 7 contacts with end cap 6.Connect
2 connect with oil cylinder 3, and positioned at the outside of oil cylinder 3, also including alarm switch 61 and elastic patch 13, alarm switch 61 is located at end
In lid 6, elastic patch 13 is electrically connected with alarm switch 61, in the interior surface of end cap 6, alarm switch 61, elastic patch 13
With push rod 1 on same straight line, gear-box 14 is contacted with the pre-load nut in base 1.
Embodiment 2
A kind of overtravel ann reset stretcher of the present embodiment, it is similar to Example 1, wherein, alarm switch 61 includes
LED lamp bead, electronics, LED lamp bead, buzzer, electronics and elastic patch are sequentially connected in series, described elastic patch and push rod 1
Top is on same straight line.End cap 6 is provided with the through hole for accommodating alarm switch 61, LED lamp bead, buzzer, electronics and reset
Button is sequentially located at from top to bottom in through hole, and the top of LED lamp bead is higher than the top of the through hole of end cap 6.
Gear-box 14 is located at the side of base 1, and described gear-box 14 includes gear 1, gear 2 142 and gear three
143, gear 1, gear 2 142 and gear 3 143 are engaged successively, and the top of gear 1 is provided with bolt hole, gear 3 143
Contact with the pre-load nut in base 1.
Described elastic patch 13 is made up of two panels flexure strip, original state, and two panels flexure strip is upper and lower released state,
Two panels flexure strip in described elastic patch 13 is separately positioned on the both sides of the lower surface of through hole, upper and lower two flexure strips point
From.
Also include overflow mechanism, overflow mechanism includes blocking 8, spring 1, steel ball 10 and push rod 1；Piston 4 it is big straight
It is provided with the section of footpath in an axially disposed up-small and down-big ladder hole, macropore and is provided with blocking 8, spring one from the bottom up
9 and steel ball 10, push rod 1 is provided with aperture, the length of push rod 1 is slightly longer than the length of aperture.
Embodiment 3
A kind of overtravel ann reset stretcher of the present embodiment, any one technical scheme is similar with embodiment 1-2, its
In, gear-box 14 is located at the side of base 1, and described gear-box 14 includes gear 1, gear 2 142 and gear 3 143,
Gear 1, gear 2 142 and gear 3 143 are engaged successively, and the top of gear 1 is provided with bolt hole, gear 3 143 and bottom
Pre-load nut contact in seat 1.
Embodiment 4
A kind of overtravel ann reset stretcher of the present embodiment, it is similar to Example 1, wherein, a kind of overtravel is reported to the police
The drawing process of reset stretcher, it is adaptable to any one technical scheme in embodiment 1-3, comprises the following steps：
A, a kind of overtravel ann reset stretcher in accordance with the above, described alarm switch 61 is sealed in end cap 6
Through hole in, the bottom of pull bar 5 is provided with the screwed hole matched with pretension bolt, and top and the end cap 6 of pull bar 5 match, thereon
The screw matched with hexagon bolt wrench is provided with, base 1 is provided with the receiving space matched with pre-load nut；
B, pretension bolt pass through base 1, extend into the bottom of pull bar 5, and pre-load nut is placed on into the receiving space of base 1
Interior, the spanner with hex bolts is placed in the screw at the top of pull bar 5, and rotary spanner is screwed into pretension bolt under pull bar 5
In the screwed hole in portion；
The step of tightening pre-load nut be：Spanner is placed in the bolt hole at the top of gear 1, rotary spanner, tooth
One 141 operatings are taken turns, is moved with one 141 meshed gears of gear 2 142, moved with 2 142 meshed gears of gear 3 143, entered
And drive pre-load nut motion in the base 1 contacted with gear 3 143.
C, joint 2 is connected with pumping plant, after pumping plant is to the oil pressurization in fuel tank, is passed in oil cylinder 3, piston 4 is pressed
Power effect is moved upwards；
D, the pushing drawing rod 5 of piston 4 are moved upwards, and pull bar 5 pulls pretension bolt to move upwards；
E, according to the pressure dependence of the specification size and tensile force and piston 4 of pre-load nut and pretension bolt, observe pumping plant
On pressure gauge when reaching the pressure value matched with the specification size of pre-load nut and pretension bolt, that is, reach the stroke of design
Afterwards, stop being refueled into fuel tank 3, the self-return under the tension force effect of spring 7 of piston 4 makes hydraulic oil be back in pumping plant；
F, due to maloperation, when pumping plant refuels excessive into fuel tank 3, i.e., piston 4 to pull bar 5 exert a force excessive when, pull bar 5
Pretension bolt is pulled to move past limit value upwards, the warning-sign wire casing 12 on pull bar 5 reaches the upper surface of end cap 6, push rod one
11 extend into end cap touches first elastic patch 13, and two flexure strips up and down of elastic patch 13 contact so that elasticity patch
Piece 13 constitutes series circuit and connects with alarm switch 61, and buzzer sounds the alarm, and LED lamp bead is glittering, reminds stretcher to be out of the line
Journey, stops pumping plant and fuel tank 3 is refueled；
If G, pumping plant continue fuel tank 3 is refueled, push rod 1 be subject to elastic patch 13 drag effect, produce one to
Under power back down steel ball 10, make in the space that hydraulic oil overflow in oil cylinder formed to end cap 6 and pull bar 5, hydraulic oil pressure release,
Piston 4 stops moving upwards, the self-return under the tension force effect of spring 7 of piston 4, hydraulic oil is back in pumping plant.
Embodiment 5
A kind of overtravel ann reset stretcher of the present embodiment, it is similar to Example 1, wherein, a kind of overtravel is reported to the police
The installation method of reset stretcher, it is adaptable to any one technical scheme in embodiment 1-3, a kind of installation method of stretcher, bag
Include following steps：
A, a kind of stretcher in accordance with the above；
B, sealing ring is respectively charged on piston 4 and oil cylinder 3 using specific purpose tool；
C, piston 4 is pressed in oil cylinder 3 using uniform force；
D, pull bar 5 is inserted in piston 4；
E, spring 7 is respectively put in the groove on the surface of piston 4；
F, end cap 6 is tightened with oil cylinder 3 using fixing screws；
G, by gear-box be arranged on the bottom of pull bar 5；
H, by base 1 be arranged on oil cylinder 3 below.
Below schematically to the present invention and embodiments thereof be described, the description does not have restricted, institute in accompanying drawing
What is shown is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area
Art personnel enlightened by it, in the case of without departing from the invention objective, is designed and the technical scheme without creative
Similar frame mode and embodiment, all should belong to protection scope of the present invention.
Claims (10)
1. a kind of overtravel ann reset stretcher, including base (1), joint (2), oil cylinder (3), piston (4), pull bar (5) and
End cap (6), positioned at oil cylinder (3) bottom, pull bar (5) is arranged in oil cylinder (3), in oil cylinder (3) and the footpath of pull bar (5) base (1)
To being provided with the piston (4) that is engaged with both of which, end cap (6) in oil cylinder (3) upper surface, between end cap (6) and piston (4)
Spring (7) is uniformly provided with, joint (2) is connected with oil cylinder (3), positioned at the outside of oil cylinder (3), it is characterised in that also including warning
Switch (61) and elastic patch (13), alarm switch (61) is in end cap (6), and elastic patch (13) is electric with alarm switch (61)
Connection, in end cap (6) interior surface, alarm switch (61), elastic patch (13) are with push rod one (11) in same straight line
On, gear-box (14) is contacted with the pre-load nut in base (1).
2. a kind of overtravel ann reset stretcher according to claim 1, it is characterised in that described alarm switch
(61) including LED lamp bead and electronics, elastic patch (13), LED lamp bead, buzzer and electronics are sequentially connected in series, described elasticity patch
The top of piece (13) and push rod one (11) is on same straight line.
3. a kind of overtravel ann reset stretcher according to claim 1 and 2, it is characterised in that gear-box (14) position
In the side of base (1), described gear-box (14) is including gear one (141), gear two (142) and gear three (143), gear
One (141), gear two (142) and gear three (143) are engaged successively, and the top of gear one (141) is provided with bolt hole, gear three
(143) contact with the pre-load nut in base (1).
4. a kind of overtravel ann reset stretcher according to claim 1 and 2, it is characterised in that described end cap (6)
The through hole for accommodating alarm switch (61) is provided with, LED lamp bead, buzzer and electronics are sequentially located at from top to bottom in through hole, LED
Top of the top of pearl higher than end cap (6) through hole.
5. a kind of overtravel ann reset stretcher according to claim 4, it is characterised in that described elastic patch
(13) it is to be made up of two panels flexure strip, original state, two panels flexure strip is upper and lower released state.
6. a kind of overtravel ann reset stretcher according to claim 1, it is characterised in that the upper surface of piston (4)
Groove is along the circumferential direction uniformly provided with, spring (7) one end is located in groove, and spring (7) other end contacts with end cap (6).
7. a kind of overtravel ann reset stretcher according to claim 5, it is characterised in that also including overflow mechanism,
Overflow mechanism includes blocking (8), spring one (9), steel ball (10) and push rod one (11)；It is provided with the enlarged diameter section of piston (4)
Blocking (8), spring one (9) and steel ball are provided with from the bottom up in one axially disposed up-small and down-big ladder hole, macropore
(10) push rod one (11), is provided with aperture, the length of push rod one (11) is slightly longer than the length of aperture.
8. a kind of drawing process of overtravel ann reset stretcher, comprises the following steps：
A, a kind of overtravel ann reset stretcher according to claim 1, described alarm switch (61) is sealed in end
In the through hole of lid (6), the bottom of pull bar (5) is provided with the screwed hole matched with pretension bolt, the top of pull bar (5) and end cap
(6) match, which is provided with the screw matched with hexagon bolt wrench, base (1) is provided with the appearance matched with pre-load nut
Receive space；
B, pretension bolt pass through base (1), extend into the bottom of pull bar (5), and the receiving that pre-load nut is placed on into base (1) is empty
Interior, the spanner with hex bolts is placed in the screw at the top of pull bar (5), and pretension bolt is screwed into pull bar by rotary spanner
(5) in the screwed hole of bottom；
C, joint (2) is connected with pumping plant, after pumping plant is to the oil pressurization in fuel tank, is passed in oil cylinder (3), piston (4) is subject to
Pressure effect is moved upwards；
D, piston (4) pushing drawing rod (5) are moved upwards, and pull bar (5) pulls pretension bolt to move upwards；
E, according to the pressure dependence of the specification size and tensile force and piston (4) of pre-load nut and pretension bolt, on observation pumping plant
Pressure gauge when reaching the pressure value matched with the specification size of pre-load nut and pretension bolt, that is, reach the stroke of design
Afterwards, stop being refueled into fuel tank (3), piston (4) self-return under the tension force effect of spring (7) makes hydraulic oil be back to pump
In standing；
F, due to maloperation, when pumping plant refuels excessive into fuel tank (3), i.e., piston (4) to pull bar (5) force it is excessive when, draw
Bar (5) pulls pretension bolt to move past limit value upwards, and the warning-sign wire casing (12) on pull bar (5) is reached on end cap (6)
Surface, push rod one (11) extend into end cap and touches elastic patch (13), two flexure strips up and down of elastic patch (13) first
Contact so that elastic patch (13) constitutes series circuit and connects with alarm switch (61), and buzzer sounds the alarm, LED
Pearl is glittering, reminds stretcher overtravel, stops pumping plant and fuel tank (3) is refueled；
If G, pumping plant continue to refuel fuel tank (3), push rod one (11) is produced one by the drag effect of elastic patch (13)
Downward power backs down steel ball (10), makes in the space that hydraulic oil overflow in oil cylinder formed to end cap (6) and pull bar (5), liquid
Force feed pressure release, piston (4) stops moving upwards, piston (4) self-return under the tension force effect of spring (7), returns hydraulic oil
In flowing pumping plant.
9. a kind of drawing process of overtravel ann reset stretcher according to claim 8, it is characterised in that step C
In be the step of tighten pre-load nut：Spanner is placed in the bolt hole at the top of gear one (141), rotary spanner, gear one
(141) operate, move with one (141) meshed gears of gear two (142), transport with two (142) meshed gears of gear three (143)
It is dynamic, and then drive the interior pre-load nut motion of the base (1) contacted with gear three (143).
10. a kind of installation method of overtravel ann reset stretcher, comprises the following steps：
A, a kind of overtravel ann reset stretcher according to claim 1；
B, sealing ring is respectively charged on piston (4) and oil cylinder (3) using specific purpose tool；
C, piston (4) is pressed in oil cylinder (3) using uniform force；
D, pull bar (5) is inserted in piston (4)；
E, spring (7) is respectively put in the groove on piston (4) surface；
F, end cap (6) is tightened with oil cylinder (3) using fixing screws；
G, by gear-box (14) installed in pull bar (5) bottom；
H, by base (1) below oil cylinder (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611266929.4A CN106624760A (en) | 2016-12-31 | 2016-12-31 | Overtravel alarming and resetting stretcher and stretching method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611266929.4A CN106624760A (en) | 2016-12-31 | 2016-12-31 | Overtravel alarming and resetting stretcher and stretching method thereof |
Publications (1)
| Publication Number | Publication Date |
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| CN106624760A true CN106624760A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611266929.4A Pending CN106624760A (en) | 2016-12-31 | 2016-12-31 | Overtravel alarming and resetting stretcher and stretching method thereof |
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| US4773146A (en) * | 1985-03-06 | 1988-09-27 | Pilgrim Engineering Developments, Ltd. | Multi-stud tensioners |
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| CN201397762Y (en) * | 2009-03-16 | 2010-02-03 | 上海超导传感器厂 | Durable mechanical diaphragm type pressure switch |
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| CN204935055U (en) * | 2015-09-14 | 2016-01-06 | 马鞍山市三江机械有限公司 | The stretcher that a kind of overtravel is protected automatically |
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Application publication date: 20170510 |