CN102628254A - Lifting mechanism for railway T-shaped girder bridge erecting machine - Google Patents
Lifting mechanism for railway T-shaped girder bridge erecting machine Download PDFInfo
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- CN102628254A CN102628254A CN2012101064891A CN201210106489A CN102628254A CN 102628254 A CN102628254 A CN 102628254A CN 2012101064891 A CN2012101064891 A CN 2012101064891A CN 201210106489 A CN201210106489 A CN 201210106489A CN 102628254 A CN102628254 A CN 102628254A
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Abstract
The invention discloses a girder lifting trolley of a lifting mechanism for a railway T-shaped girder bridge erecting machine. The girder lifting trolley comprises at least one set of lifting winch system. According to the lifting mechanism for the railway T-shaped girder bridge erecting machine, a double-helix mechanical rope arrangement device is additionally arranged in a constrained space, so that the disorder of ropes in the winding of a plurality of layers of steel wire ropes on a winding drum body is avoided, and the service lives of the steel wire ropes are prolonged; final braking devices are additionally arranged in the constrained space to realize automatic braking when planetary gear winches overrun and prevent the slip of T-shaped girder pieces, so that the safety performance of the bridge erecting machine is improved; and moreover, a monitoring device is additionally arranged, each final braking device realizes braking when any winch stalls, a main hoist motor is powered off and braked, and a monitoring system displays the winch which stalls, so that failure judgment is facilitated, and overhauling time is shortened.
Description
Technical field
The technical field of the lifting mechanism that the present invention relates to relates in particular to a kind of railway T beam bridge formation machine lifting mechanism.
Background technology
At present; Newly-built and the old line of China transform 200 kilometers of speed per hours and below passenger-cargo conllinear T type beam (logical bridge 2201 types; 2101 types), the single armed railway T beam bridge formation machine that uses in the construction of 32 meters on railway and following concrete beam surpasses 150, and, along with the demand of domestic pulling domestic demand; And the railway construction further propelling of aspect such as go abroad, the quantity of bridge formation machine also will increase considerably.And setting up of single, double line T beam is a high risk job, and safety issue is the emphasis of paying close attention in the industry always.
Railway T beam bridge formation machine is a main construction machinery of building the China railways bridge at present, owing to receive the restriction of railway transportation (Railway Freight Transportation rule) and construction environment (track clearance in the tunnel), the contour structure size design of bridge formation machine is very compact; The arrangement space of its hanging beam dolly is narrow and small especially, and existing railway T beam bridge formation machine is owing to receive the restriction of technical condition, and its lifting mechanism does not have wire rope rope guide and hoist engine final stage check mechanism; The disorder cable phenomenon often takes place during bridge formation frame bridge construction, cause wire rope extremely short application life, average life span is 40 hole beams only; It is frequent to cause wire rope to change rope; Waste greatlyyer, have potential safety hazard simultaneously, influence construction speed; The hoist engine that hoists in addition has only level braking (motor side braking) at a high speed; When bridge formation machine hanging beam is constructed, if brake breaks down or transmission system breaks down and cause the high speed shaft off-axis, when hoist engine self can't be braked; The beam sheet will landing, causes great security incident.
For overcoming these defectives; Existing 900 tons of box beam bridge formation machines adopt the shaft coupling+planet reel of motor+band brake wheel as lifting mechanism; Speed end adopts block brake to act on the shaft coupling of band brake wheel and brakes; The planet reel of low speed end adopts the hydraulic safe brake to act on the reel edge of a wing and brakes, but this bridge formation machine requisite space is bigger, only is applicable to the situation that does not have spatial constraints.
So there is following defective in the prior art:
1. have the hoisting system that hoists when railway T beam bridge formation machine is built bridge construction now the disorder cable phenomenon often takes place, cause wire rope extremely short application life, average life span is 40 hole beams only; It is frequent to cause wire rope to change rope, waste bigger, the cost height; Simultaneously also there is potential safety hazard, influences construction speed.Some engineering construction unit is in order to reduce the turnover rate of wire rope in addition, when unloaded in the vehicle frame outside of hoisting mechanism the row of setting up rope workman, carry out manual work row rope, this processing mode danger greatly, treatment effect is also bad; When load,, be difficult to carry out manual work row rope because pull of steel wire is excessive.
2. the hoisting system that hoists of existing railway T beam bridge formation machine has only level braking (motor side braking) at a high speed; In bridge formation machine hanging beam dolly lifting mechanism hanging beam work progress, brake breaks down or transmission system breaks down and cause the high speed shaft off-axis, when hoist engine self can't be braked; The beam sheet will landing; Gently then bridge pier and T beam are impaired, and be heavy then there is serious potential safety hazard in the fatal crass.
3. the hoisting system that hoists of existing railway T beam bridge formation machine does not have supervising device, and in a single day this hoisting system that hoists goes wrong, and operating personnel can't know correlation circumstance, the stall conditions of the more uncontrollable hoisting system that hoists.
In view of the foregoing, in order to reduce the replacing frequency of wire rope, practice thrift cost; Eliminate safe hidden trouble, improve the safety of equipment, designer of the present invention is because above-mentioned defective; Through concentrating on studies and designing; Comprehensive experience and the achievement of being engaged in related industry for a long time for many years, research and design goes out a kind of railway T beam bridge formation machine lifting mechanism, to overcome above-mentioned defective.
Summary of the invention
The object of the present invention is to provide a kind of railway T beam bridge formation machine lifting mechanism; It is simple in structure, and is easy to operate, can not only effectively reduce the replacing frequency of wire rope; Reduce the replacing number of times of wire rope; Reduce cost and working strength of workers, and can further eliminate safe hidden trouble, improve the safety of equipment.
For realizing above-mentioned purpose; The invention discloses a kind of hanging beam dolly of railway T beam bridge formation machine lifting mechanism; This hanging beam dolly comprises at least one cover hoisting system that hoists; This hoisting system that hoists comprises power set, planetary gear cord winder, double helix machinery rope guide and control system at least, it is characterized in that:
These power set comprise elevator motor and dynamic retarding mechanism; This planetary gear cord winder comprises planetary gear, planet carrier, sun gear shaft, gear ring and spool body; One end of this sun gear shaft links to each other with dynamic retarding mechanism output shaft through the internal spline adapter sleeve; The rotation of elevator motor-driven dynamic retarding mechanism, thus drive the spool body rotation through planetary gear; The other end of this sun gear shaft is connected to mechanical rope guide through sprocket chain device;
This machinery rope guide comprises a two-way screw rod and a sheave; This reverse-flighted screw is provided with the thread groove of left and right sides both direction and laterally arranges with spool shaft; Mutual transition forms the loop of sealing to the thread groove of this left and right sides both direction at two of this double threaded screw; This sheave comprises two and is oppositely arranged with the guide wheel of clamped wire rope and embeds the shuttle pieces in the thread groove of reverse-flighted screw, thereby when reverse-flighted screw rotated, this sheave can axially moving around along this reverse-flighted screw;, spool body drives the distance that move axially a wirerope diameter of sheave when rotating a circle along screw rod; Thereby when wire rope when intact one deck arrives the spool body end, the shuttle piece also carries out the transition on the screw thread of other direction at the screw thread of reverse-flighted screw head from a direction simultaneously, realizes wire rope multilayer row rope and disorder cable not;
Rotary encoder on the sprocket wheel that the control system comprises with spool body links to each other and controller.
Wherein, the gearratio of chain wheel actuator is 3.
Wherein also comprise the final stage check mechanism; This final stage check mechanism comprises braked wheel, brake band, connector, hydraulic cylinder and pumping plant; This braked wheel and spool body are wholely set together rotation; This brake band is around the circumference of braked wheel, and the one of which end is fixed, and the other end is connected to the drive end of hydraulic cylinder through connector.
Wherein, Be surrounded by wearing layer on the circumference of this braked wheel, this brake band is the steel band on 5/6ths circumference of braked wheel, and this connector comprises fixed cover and the rotatable cylindrical body that passes fixed cover; One end of cylindrical body is provided with the little cam of the drive end that is articulated to hydraulic cylinder; The other end is provided with the big cam of the other end that is connected to brake band, because the leverage principle of big or small cam produces bigger brake force.
Wherein, This final stage check mechanism also includes the Hynautio-steering of controlling hydraulic cylinder; This Hynautio-steering comprises oil suction cleaner, motor M, oil pump, overflow valve, one way valve, pressure switch, electromagnetic valve, one-way throttle valve, accumulator, oil cylinder and manual pump, and an end of oil pump is connected to fuel tank through the oil suction cleaner, and oil pump is controlled by motor M; The other end of oil pump is connected to the inlet of overflow valve and one way valve; The outlet of overflow valve is connected to fuel tank through a cleaner, and the outlet of one way valve is connected to inlet and the pressure switch and the accumulator of electromagnetic valve and one-way throttle valve, and the outlet of electromagnetic valve is connected to fuel tank through this cleaner equally; The outlet of one-way throttle valve is connected to oil cylinder and manual pump, and the other end of this manual pump is connected to fuel tank through another cleaner.
Wherein, Also comprise the final stage check mechanism; This final stage check mechanism comprises with opening two shoe type shoe brakes in the braking brake drum of the affixed rotation of spool body, two, is connected to form an interior two shoe brake with the compression spring through brake cylinder between the two braking shoe plates.
Wherein, This final stage check mechanism also includes the Hynautio-steering of controlling hydraulic cylinder; This Hynautio-steering comprises oil suction cleaner, motor M, oil pump, overflow valve, one way valve, pressure switch, electromagnetic valve, one-way throttle valve, accumulator, oil cylinder and manual pump, and an end of oil pump is connected to fuel tank through the oil suction cleaner, and oil pump is controlled by motor M; The other end of oil pump is connected to the inlet of overflow valve and one way valve; The outlet of overflow valve is connected to fuel tank through a cleaner, and the outlet of one way valve is connected to inlet and the pressure switch and the accumulator of electromagnetic valve and one-way throttle valve, and the outlet of electromagnetic valve is connected to fuel tank through this cleaner equally; The outlet of one-way throttle valve is connected to oil cylinder and manual pump, and the other end of this manual pump is connected to fuel tank through another cleaner.
Through said structure, railway T beam bridge formation machine lifting mechanism of the present invention can be realized following technique effect:
(1) increase double helix machinery rope guide at small space, disorder cable not when guaranteeing that the multilayer wire rope twines on the spool body prolongs wire rope application life.
(2) in small space, increase the final stage check mechanism, automatic brake when realizing the hoist engine hypervelocity prevents the landing of T type beam sheet, improves the security performance of bridge formation machine.
(3) increase supervising device, when arbitrary hoist engine stall, each is the braking of level check mechanism not, while master winch motor power-off brake, and, be convenient to fault judgement by monitoring system demonstration stall hoist engine, shorten the repair time.
The present invention will further describe in detail through following specific embodiment, and further combine right
The explanation of accompanying drawing will obtain clear more and tangible understanding.
Description of drawings
Fig. 1 has shown the structural representation of the hanging beam dolly of railway T beam bridge formation machine lifting mechanism of the present invention.
Fig. 2 has shown the phantom of hanging beam dolly shown in Figure 1.
Fig. 3 has shown the hydraulic system sketch map of railway T beam bridge formation machine lifting mechanism of the present invention.
Fig. 4 has shown the sketch map of another embodiment of final stage check mechanism of the present invention.
The specific embodiment
Referring to Fig. 1 and Fig. 2, shown the structural representation of the hanging beam dolly of railway T beam bridge formation machine lifting mechanism of the present invention, railway T beam bridge formation machine lifting mechanism of the present invention comprises at least one hanging beam dolly shown in Figure 1; Preferably comprise two hanging beam dollies, this hanging beam dolly comprises at least one cover hoisting system that hoists, and is preferably as shown in the figure; Include the symmetrically arranged hoisting system that hoists of two covers; Promptly preferred, can have the quadruplet hoisting system that hoists, so that the elevator that hoists of four wire rope to be provided.
This hoisting system that hoists comprises power set, planetary gear cord winder, double helix machinery rope guide, final stage check mechanism, Hydraulic Station 3 and control system at least.
Power set wherein comprise elevator motor 11 and reducing gear; The planetary gear cord winder comprises planetary gear, planet carrier, sun gear shaft, gear ring and spool body; Basic identical in its structure and the prior art; Be not described in detail at this, an end of this sun gear shaft links to each other with dynamic retarding mechanism output shaft through the internal spline adapter sleeve, and elevator motor 11 drives dynamic retarding mechanisms and rotates; Dynamic retarding mechanism output shaft links to each other with sun gear shaft, thereby drives the spool body rotation through planetary gear; The other end is connected with sprocket chain device 8 through spool body; Sprocket chain device 8 is connected to double helix machinery rope guide; This double helix machinery rope guide comprises reverse-flighted screw 2 and sheave 1, and this reverse-flighted screw 2 is provided with the thread groove of left and right sides both direction and laterally arranges with the reel axon, and mutual transition forms the loop of sealing to the thread groove of this left and right sides both direction at two of this double threaded screw; This sheave 1 comprises two shuttle pieces that are oppositely arranged in guide wheel of restricting with clamped wire and the thread groove that embeds reverse-flighted screw 2; Thereby when reverse-flighted screw 2 rotation, this sheave 1 can be along axially the moving around of this reverse-flighted screw 2, when spool body rotates a circle; Make reverse-flighted screw 2 rotations; Cause the shuttle piece relative to axially the moving of screw rod, drive sheave 1 and just in time move the distance of a wirerope diameter along axially (both same relative volume cylindrical shell axially) of screw rod, thereby when wire rope during around intact one deck arrival spool body end; The shuttle piece also carries out the transition on the screw thread of other direction at the screw thread of reverse-flighted screw head from a direction simultaneously, realizes wire rope multilayer row rope and disorder cable not.
For realizing the distance that axially just in time move a wirerope diameter of sheave 1 along screw rod; Slot pitch that can thread groove is set to equal the diameter of wire rope; To be set to gearratio be 1 to the chain sprocket device simultaneously; Reverse-flighted screw 2 was rotated a circle equally, and sheave 1 realizes moving the purpose of a wirerope diameter along the slot pitch of a thread groove of screw axial at this moment; Slot pitch that also can thread groove is set to equal the twice of the diameter of wire rope, and to be set to gearratio be 2 to the chain sprocket device simultaneously, both when spool body rotates a circle, made reverse-flighted screw 2 rotation half cycles; Sheave 1 is along the slot pitch of half thread groove of screw axial at this moment, and the purpose of a wirerope diameter is moved in same realization, by that analogy; Thus, can pass through this machinery rope guide, avoid the disorder cable phenomenon that when the wire rope multi-lay winding, takes place; Improve rope service-life; Reduce the wire rope loss, reduce cost, improve construction speed.
Final stage check mechanism wherein comprises braked wheel 7, brake band 6, connector 5 and hydraulic cylinder 4, and this braked wheel 7 is wholely set with together rotation with spool body 10, and this brake band 6 is around the circumference of braked wheel 7; The one of which end is fixing different, and the other end is connected to the drive end of hydraulic cylinder 4 through connector 5, preferably; Be surrounded by wearing layer on the circumference of this braked wheel 7; This brake band 6 is the steel band on 5/6ths circumference of braked wheel, and this connector 5 comprises fixed cover and the rotatable cylindrical body that passes fixed cover, and an end of cylindrical body is provided with the little cam of the drive end that is articulated to hydraulic cylinder 4; The other end is provided with the big cam of the other end that is connected to brake band 6; Through the big or small cam setting at cylindrical body two ends, when the drive end of hydraulic cylinder 4 bounces back, little cam driven cylindrical body rotation; Drive big cam revolution simultaneously, thus brake band 6 encase braked wheel 7 periphery so that the braking of spool body 10 to be provided.Because the leverage principle of big or small cam, the bigger pulling force of position generation in that big cam is connected with brake band 6 can better produce brake force thus, and wearing layer further frictional force and the braking effect of having improved be set.
And this final stage check mechanism also includes the Hynautio-steering (referring to Fig. 3) of controlling hydraulic cylinder 4; This Hynautio-steering comprises oil suction cleaner 21, motor M 22, oil pump 23, overflow valve 24, one way valve 25, pressure switch 26, electromagnetic valve 27, one-way throttle valve 28, accumulator 29, oil cylinder 30 and manual pump 31; One end of oil pump 23 is connected to fuel tank through oil suction cleaner 21; Oil pump 23 is by motor M 22 controls, and the other end of oil pump 23 is connected to the inlet of overflow valve 24 and one way valve 25, and the outlet of overflow valve 24 is connected to fuel tank through a cleaner; The outlet of one way valve 25 is connected to inlet and the pressure switch 26 and accumulator 29 of electromagnetic valve 27 and one-way throttle valve 28; The outlet of electromagnetic valve 27 is connected to fuel tank through this cleaner equally, and the outlet of one-way throttle valve 28 is connected to oil cylinder 30 and manual pump 31, and the other end of this manual pump 31 is connected to fuel tank through another cleaner; And preferably, the import and export of this manual pump 31 are provided with one way valve.
Introduce the principle of this Hynautio-steering below, when operate as normal, system provides and opens a sluice gate signal to electrical control cubicles; Motor M 22 and electromagnetic valve 27 get electric, and pressure oil gets into brake oil cylinders 30 (corresponding to hydraulic cylinders 4) through one way valve 25, one-way throttle valve 28, and oil cylinder protracts and overcomes the effect of rod chamber spring force; Brake band discharges gradually; After brake band release put in place, the limit switch action was sent release signal and is given hoisting mechanism; Wherein each opens a sluice gate respectively corresponding each check mechanism of signal; Thereby realize the release of check mechanism, be convenient to hoisting system work.Brake is after release, and system pressure reaches the pressure switch contact action of pressure switch 26 setting values (for example 5MPA) back and breaks off motor M 22 stalls; Electromagnetic valve keep electricity condition, this moment, brake was in the packing state after the release, when pipeline has leakage; In case system pressure is lower than predetermined value (for example 4MPA), the action of pressure switch 26 contacts is closed, motor M 22; System's ftercompction, pressure are to setting value (like 5MPA), and motor cuts off the power supply; Do action like this, the constant pressure when keeping hoisting hoisting system work makes the hoisting system operate as normal that hoists.
Control system wherein comprises the rotary encoder 9 and the controller of the other end that is arranged at spool shaft; This controller can be PLC, and rotary encoder 9 is connected with the rotating speed with spool shaft with controller and passes to controller, when the spool body stall of the hoisting system that hoists; Rotary encoder 9 is given PLC with the transfer of data that detects; PLC will transmit the data and the setting value of coming and compare, and elevator motor 11, motor 22, electromagnetic valve 27 dead electricity are broken off when this is worth greater than setting value, and pressure oil is got back to fuel tank through one-way throttle valve 28, electromagnetic valve 27; Brake oil cylinder 30 resets under the active force of spring; The drive end of hydraulic cylinder 4 retraction causes brake band 6 brake sticking brakes wheel 7, the final stage braking function of the elevator of realizing hoisting.
When the encoder of the hoisting system that hoists detects the spool body hypervelocity of any hoisting system that hoists; Two Hydraulic Station electromagnetic valve 27 equal dead electricity, the brake hard simultaneously of four table brakes, indicator lamp shows the position of hoist hoisting system hypervelocity and hypervelocity spool body on the electric control box; And the feedback overspeed signal is given master control system; With elevator motor 11 power-off brakes, realize multistage brake simultaneously, improve the security performance of complete machine.
And final stage check mechanism of the present invention can be not limited to said structure; Referring to Fig. 4; As when the spatial shape size is enough big, this final stage check mechanism can comprise between the braking brake drum 41 of spool body 10 affixed rotations, interior two shoe type shoe brake 42, two braking shoe plates 42 and be connected with compression spring 44 through brake cylinder 43; Open two shoe brake in forming thus, when brake cylinder 43 shrinks, make compression spring 44 realize release function; Compression spring 44 return pushing tow shoe brakes are not realized braking function (its hydraulic pressure is controlled schematic diagram such as Fig. 2) when the rod chamber of brake cylinder 43 has pressure oil.
It is obvious that, and above description and record only are for example rather than in order to limit disclosure of the present invention, application or use.Though described and be described in the drawings embodiment in an embodiment; But the optimal mode that the present invention does not limit by the accompanying drawing example and the conduct of describing is in an embodiment thought at present is with the specific examples of the instruction of embodiment of the present invention, and scope of the present invention will comprise any embodiment of the manual that falls into the front and appended claim.
Claims (7)
1. the hanging beam dolly of a railway T beam bridge formation machine lifting mechanism; This hanging beam dolly comprises at least one cover hoisting system that hoists; This hoisting system that hoists comprises power set, planetary gear cord winder, double helix machinery rope guide and control system at least, it is characterized in that:
These power set comprise elevator motor and dynamic retarding mechanism; This planetary gear cord winder comprises planetary gear, planet carrier, sun gear shaft, gear ring and spool body; One end of this sun gear shaft links to each other with dynamic retarding mechanism output shaft through the internal spline adapter sleeve; The rotation of elevator motor-driven dynamic retarding mechanism, thus drive the spool body rotation through planetary gear; The other end of this sun gear shaft is connected to mechanical rope guide through sprocket chain device;
This machinery rope guide comprises a two-way screw rod and a sheave; This reverse-flighted screw is provided with the thread groove of left and right sides both direction and laterally arranges with spool shaft; Mutual transition forms the loop of sealing to the thread groove of this left and right sides both direction at two of this double threaded screw; This sheave comprises two and is oppositely arranged with the guide wheel of clamped wire rope and embeds the shuttle pieces in the thread groove of reverse-flighted screw, thereby when reverse-flighted screw rotated, this sheave can axially moving around along this reverse-flighted screw;, spool body drives the distance that move axially a wirerope diameter of sheave when rotating a circle along screw rod; Thereby when wire rope when intact one deck arrives the spool body end, the shuttle piece also carries out the transition on the screw thread of other direction at the screw thread of reverse-flighted screw head from a direction simultaneously, realizes wire rope multilayer row rope and disorder cable not;
Rotary encoder on the sprocket wheel that the control system comprises with spool body links to each other and controller.
2. hanging beam dolly as claimed in claim 1 is characterized in that, the gearratio of chain wheel actuator is 3.
3. according to claim 1 or claim 2 hanging beam dolly; It is characterized in that also comprising the final stage check mechanism; This final stage check mechanism comprises braked wheel, brake band, connector, hydraulic cylinder and pumping plant, and this braked wheel and spool body are wholely set together rotation, and this brake band is around the circumference of braked wheel; The one of which end is fixed, and the other end is connected to the drive end of hydraulic cylinder through connector.
4. hanging beam dolly as claimed in claim 3; It is characterized in that; Be surrounded by wearing layer on the circumference of this braked wheel, this brake band is the steel band on 5/6ths circumference of braked wheel, and this connector comprises fixed cover and the rotatable cylindrical body that passes fixed cover; One end of cylindrical body is provided with the little cam of the drive end that is articulated to hydraulic cylinder; The other end is provided with the big cam of the other end that is connected to brake band, because the leverage principle of big or small cam produces bigger brake force.
5. hanging beam dolly as claimed in claim 3; It is characterized in that; This final stage check mechanism also includes the Hynautio-steering of controlling hydraulic cylinder; This Hynautio-steering comprises oil suction cleaner, motor M, oil pump, overflow valve, one way valve, pressure switch, electromagnetic valve, one-way throttle valve, accumulator, oil cylinder and manual pump, and an end of oil pump is connected to fuel tank through the oil suction cleaner, and oil pump is controlled by motor M; The other end of oil pump is connected to the inlet of overflow valve and one way valve; The outlet of overflow valve is connected to fuel tank through a cleaner, and the outlet of one way valve is connected to inlet and the pressure switch and the accumulator of electromagnetic valve and one-way throttle valve, and the outlet of electromagnetic valve is connected to fuel tank through this cleaner equally; The outlet of one-way throttle valve is connected to oil cylinder and manual pump, and the other end of this manual pump is connected to fuel tank through another cleaner.
6. according to claim 1 or claim 2 hanging beam dolly; It is characterized in that also comprising the final stage check mechanism; This final stage check mechanism comprises with opening two shoe type shoe brakes in the braking brake drum of the affixed rotation of spool body, two, is connected to form an interior two shoe brake with the compression spring through brake cylinder between the two braking shoe plates.
7. hanging beam dolly as claimed in claim 6; It is characterized in that; This final stage check mechanism also includes the Hynautio-steering of controlling hydraulic cylinder; This Hynautio-steering comprises oil suction cleaner, motor M, oil pump, overflow valve, one way valve, pressure switch, electromagnetic valve, one-way throttle valve, accumulator, oil cylinder and manual pump, and an end of oil pump is connected to fuel tank through the oil suction cleaner, and oil pump is controlled by motor M; The other end of oil pump is connected to the inlet of overflow valve and one way valve; The outlet of overflow valve is connected to fuel tank through a cleaner, and the outlet of one way valve is connected to inlet and the pressure switch and the accumulator of electromagnetic valve and one-way throttle valve, and the outlet of electromagnetic valve is connected to fuel tank through this cleaner equally; The outlet of one-way throttle valve is connected to oil cylinder and manual pump, and the other end of this manual pump is connected to fuel tank through another cleaner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106489.1A CN102628254B (en) | 2012-04-12 | 2012-04-12 | Lifting mechanism for railway T-shaped girder bridge erecting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210106489.1A CN102628254B (en) | 2012-04-12 | 2012-04-12 | Lifting mechanism for railway T-shaped girder bridge erecting machine |
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| CN102628254A true CN102628254A (en) | 2012-08-08 |
| CN102628254B CN102628254B (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032682A (en) * | 2014-06-13 | 2014-09-10 | 中铁重工有限公司 | Chain opening method for hydraulic gantry transfer crane |
| CN105621322A (en) * | 2016-02-24 | 2016-06-01 | 上海市闸北区物流工程技术研究所 | Full-hydraulic electric stacking forklift |
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| EP0469182A2 (en) * | 1990-07-30 | 1992-02-05 | Vulkan Engineering Gmbh | Device for lifting, lowering and the water carriage of heavy loads |
| CN2682053Y (en) * | 2003-12-23 | 2005-03-02 | 石世清 | Mechanical speed regulation hoisting winch |
| CN2784386Y (en) * | 2005-03-18 | 2006-05-31 | 胡申元 | Pin and grooved wheel-driven rope arrangement means with safety unit |
| CN1803568A (en) * | 2006-01-17 | 2006-07-19 | 太原理工大学 | Rope arranging automatically winch |
| CN101244795A (en) * | 2007-02-12 | 2008-08-20 | 索成将 | Counting and force-testing device for winch |
| CN202705901U (en) * | 2012-04-12 | 2013-01-30 | 中铁重工有限公司 | Hanging beam trolley of hoisting mechanism of railway T-shaped beam bridge girder erection machine |
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2012
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0469182A2 (en) * | 1990-07-30 | 1992-02-05 | Vulkan Engineering Gmbh | Device for lifting, lowering and the water carriage of heavy loads |
| CN2682053Y (en) * | 2003-12-23 | 2005-03-02 | 石世清 | Mechanical speed regulation hoisting winch |
| CN2784386Y (en) * | 2005-03-18 | 2006-05-31 | 胡申元 | Pin and grooved wheel-driven rope arrangement means with safety unit |
| CN1803568A (en) * | 2006-01-17 | 2006-07-19 | 太原理工大学 | Rope arranging automatically winch |
| CN101244795A (en) * | 2007-02-12 | 2008-08-20 | 索成将 | Counting and force-testing device for winch |
| CN202705901U (en) * | 2012-04-12 | 2013-01-30 | 中铁重工有限公司 | Hanging beam trolley of hoisting mechanism of railway T-shaped beam bridge girder erection machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032682A (en) * | 2014-06-13 | 2014-09-10 | 中铁重工有限公司 | Chain opening method for hydraulic gantry transfer crane |
| CN105621322A (en) * | 2016-02-24 | 2016-06-01 | 上海市闸北区物流工程技术研究所 | Full-hydraulic electric stacking forklift |
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| Publication number | Publication date |
|---|---|
| CN102628254B (en) | 2015-03-11 |
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