CN101982399B - Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system - Google Patents

Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system Download PDF

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Publication number
CN101982399B
CN101982399B CN 201010271263 CN201010271263A CN101982399B CN 101982399 B CN101982399 B CN 101982399B CN 201010271263 CN201010271263 CN 201010271263 CN 201010271263 A CN201010271263 A CN 201010271263A CN 101982399 B CN101982399 B CN 101982399B
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CN
China
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valve
pressure
position
back
circuit
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CN 201010271263
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Chinese (zh)
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CN101982399A (en
Inventor
赵新民
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安徽天康(集团)股份有限公司
赵新民
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Publication of CN101982399A publication Critical patent/CN101982399A/en
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Publication of CN101982399B publication Critical patent/CN101982399B/en

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Abstract

The invention discloses a hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system. The system comprises a pressure-regulating circuit, a throttling circuit, an actuating mechanism back-pressure circuit and a differential back-pressure superposition circuit, wherein the actuating mechanism back-pressure circuit contains a hydraulic oil cylinder and sequence valves which are connected with the front and back cavities of the hydraulic oil cylinder; the differential back-pressure superposition circuit contains a manual bi-position three-way valve and a check valve; the reset position of the manual bi-position three-way valve is communicated with the front cavity of the hydraulic oil cylinder, the differential position of the manual bi-position three-way valve is communicated with the check valve; and the check valve is connected with the sequence valve of the back cavity of the hydraulic oil cylinder. By adopting the invention, the technical level of the current hydraulic lift iron tower rod hydraulic system can be increased and the new energy construction in China can be promoted; and the invention has a positive meaning to the progresss of the electric power circuit and the construction of the communication line.

Description

Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system

Technical field

The present invention relates to the hydraulic lifting independent iron tower pole technical field, specifically belong to hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system.

Background technology

Along with China's new forms of energy are built, electric power circuit is built, the quick step development that traffic and communication are built, the requirement of the large-scale independent iron tower pole that association area is required is increasing, and large-scale self iron tower pole is strong with its rigidity, and floor area is little, the advances such as easy care are used more and more, the independent iron tower pole of aerogenerator for example, ultra-high-tension power transmission line independent iron tower pole, iron tower pole that the relay communication of railway and express highway is used etc.The manufacturing technology of these independent iron tower poles is ripe, and at present in the unapproachable mountain area of large-scale lifting machinery, the island is these tens meters highly easily, and the independent iron tower pole of weight number ton is installed the existing hydraulic lifting technology that adopts and carried out; Solve lifting in the most employings of present known hydraulic lifting system circuit technology chamber access sequence valve composition backpressure circuit before and after actuating unit and close up the collision of generation and the safety of falling, but system increased resistance when chamber access sequence valve was set up back pressure and also brought lifting before and after the actuating unit simply, cause system effectiveness to descend, this also runs counter to the original intention of large-scale iron tower pole hydraulic lifting energy-saving and emission-reduction.

Summary of the invention

The purpose of this invention is to provide a kind of hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system, the actuating unit that after front/back cavity access sequence valve is set up back pressure, the brings resistance that moves ahead, the technical bottleneck that causes system effectiveness to descend, simultaneously in actuating unit ante-chamber stack back pressure, stability when raising tower bar closes up, to promoting the technical merit of present hydraulic lifting iron tower pole hydraulic efficiency pressure system, promote the new forms of energy construction of China, the progress of electric power circuit and communication line construction has positive effect.

Technical scheme of the present invention is as follows:

Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system, include pressure-control circuit, throttle circuit, actuating unit backpressure circuit and differential back pressure stack loop, the front/back cavity that described actuating unit backpressure circuit includes hydraulic ram and hydraulic ram all is connected with sequence valve, sequence valve is connecting change-over valve, change-over valve is connecting flow regulating valve, the check valve in the throttle circuit, throttle circuit is connected to fuel tank, be provided with pressure-control circuit between throttle circuit and the fuel tank, pressure-control circuit includes by pass valve, compression indicator; Described differential back pressure stack loop includes manual two-position three-way valve, check valve, manually the reset position of two-position three-way valve is connected the ante-chamber of hydraulic ram, manually the differential position of two-position three-way valve and check valve are connected, and check valve is connected to the sequence valve of the back cavity of hydraulic ram.

Described sequence valve includes pressure regulating valve, check valve in parallel.

Described change-over valve is the 3-position 4-way hand change over valve.

Beneficial effect of the present invention is as follows:

The present invention can be applied to 20m-40m height aerogenerator independent iron tower pole, transmission line of electricity independent iron tower pole, hydraulic efficiency pressure system is installed in the lifting of the large-scale independent iron tower pole of traffic communication, after hydraulic system applications has been installed in lifting, the efficient of system, system reliability and safety will obtain the assurance of essence, and the technical merit of system also is improved thus; The present invention is the backcountry, the island, the unapproachable area of the large-scale self-propelled lifting appliance such as Hills is installed and is established the hydraulic efficiency pressure system that large-scale independent iron tower pole has been started fool proof, reliable, economic advanced technology, the energy construction of the present invention to promoting that these are regional, the economic development of the aspects such as electric power, traffic, communication construction has great meaning.

The objective of the invention is breaking through the existing actuating unit that after chamber, front and back access sequence valve is set up back pressure, the brings resistance that moves ahead, the technical bottleneck that causes system effectiveness to descend, simultaneously in actuating unit ante-chamber stack back pressure, the stability when improving the tower bar and closing up.Use of the present invention promotes the new forms of energy construction of China to promoting the technical merit of present hydraulic lifting iron tower pole hydraulic efficiency pressure system, and the progress of electric power circuit and communication line construction has positive effect.

Description of drawings

Fig. 1 is hydraulic system principle figure of the present invention.

Number in the figure: hydraulic ram 1, piston rod 2,3-position 4-way hand change over valve 3, high-pressure oil pump 4, fuel tank 5, by pass valve 6, flow regulating valve 7, check valve 8, pressure meter switch 9, compression indicator 10, check valve 11, pressure regulating valve 12, pressure regulating valve 13, check valve 14, two-position three-way hand change valve 15, check valve 16.

The specific embodiment

Referring to accompanying drawing, hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system, include pressure-control circuit, throttle circuit, actuating unit backpressure circuit and differential back pressure stack loop, the actuating unit backpressure circuit include hydraulic ram 1 and hydraulic ram before, back cavity all is connected with sequence valve, the sequence valve that is connected with ante-chamber includes pressure regulating valve 13 in parallel, check valve 14, the sequence valve that is connected with back cavity includes pressure regulating valve 12 in parallel, check valve 11, sequence valve is connecting 3-position 4-way hand change over valve 3,3-position 4-way hand change over valve 3 is connecting the flow regulating valve 7 in the throttle circuit, check valve 8, throttle circuit is connected respectively to high-pressure oil pump 4, fuel tank 5, be provided with pressure-control circuit between throttle circuit and the fuel tank, pressure-control circuit includes by pass valve 6, pressure meter switch 9, compression indicator 10; Differential back pressure stack loop includes manual two-position three-way valve, check valve, manually the reset position of two-position three-way valve is connected the ante-chamber of hydraulic ram, manually the differential position of two-position three-way valve and check valve are connected, check valve is connected to the sequence valve of the back cavity of hydraulic ram, after the ante-chamber of hydraulic ram 1 enters pressure oil, piston rod 2 moves ahead, promote tower bar B fulcrum C, piston rod 2 also rise to rotate with the tower bar, the tower bar is made circular path around hinge-point D by arrow and is risen, the tower bar rises to perpendicular to the ground, and lifting work is finished;

Ante-chamber reset position B1 with the hydraulic ram of a manual two-position three-way valve connects the ante-chamber oil return, make the back cavity oil-feed of hydraulic ram promote the back pressure that the tower bar has been eliminated sequence valve when up, making spill pressure is 0, and the hydraulic ram resistance that moves ahead is 0, and system effectiveness is improved; When the c position, when manually two-position three-way valve replaces to B2, system pressure oil check valve 16 enters the hydraulic ram ante-chamber, front/back cavity advances pressure oil simultaneously, forms differential circuit, and ante-chamber also forms new back pressure because entering pressure oil, the ante-chamber of hydraulic ram forms differential stack back pressure like this, the ante-chamber back pressure been significantly enhanced, and the tower bar simultaneously Speed Reduction that moves ahead closes up stability and is guaranteed; By pass valve 6 forms the system pressure regulating loop for by pass valve, and check valve 8 and flow regulating valve 7 form system's speed control loop, and pressure regulating valve 13 is hand-operated three-position, forms system's commutation loop;

3-position 4-way hand change over valve 3 guiding valves move on to the C2 position among the figure, the unidirectional valve member 11 of pressure oil in sequence valve, and hydraulic ram 1 back cavity oil-feed pushing piston bar 2 is up, and working substance B rises; Hydraulic ram 1 ante-chamber oil avoids being connected to the sequence valve of ante-chamber, through two-position three-way hand change valve 15 two-position three ways (B1 position) change-over valve oil sump tank, this moment, the pressure oil of two-position three-way hand change valve 15 oil sump tanks was 0 pressure, because the resistance that hydraulic ram 1 piston moves ahead and forms without back pressure, system effectiveness has obtained maximum raising;

3-position 4-way hand change over valve 3 guiding valves remain on the C2 position, tower bar B rises along with the over the ground increasing of level angle, systemic effect pressure is reducing, when tower bar B is lifted to more than 75 °, systemic effect pressure will significantly reduce, the deadweight of tower bar will have the tendency that breaks away from actuating unit, and at this moment the collision of line direction must arrange back pressure to the ante-chamber of actuating unit before occuring; Manual two-position three-way hand change valve 15 guiding valves are moved to the B2 chamber, this moment, the oil return of part A oil cylinder ante-chamber must diverted via pressure regulating valve 13 balance cocks, because the effect of balance cock, ante-chamber builds up back pressure, simultaneously two-position three-way hand change valve 15 cuts off the oil returns of oil cylinder A ante-chamber, simultaneously again with the pressure oil of oil cylinder A back cavity; Through check valve 16 access ante-chambers, form differential back pressure, thereby make ante-chamber form the stack back pressure, make the oil cylinder piston gait of march slack-off, tower bar B its deadweight when approaching closing up is subjected to the back pressure bracketing, close up slowly and stablize, eliminated the collision that the tower bar that produces because tower bar deadweight (five or six tons are at least picked up several two ten tons at most) closes up generation fully;

The operator should note observing compression indicator, and when system pressure was down to 5Mpa, the three-position valve invariant position of right-hand operated, left hand promoted two-position three-way hand change valve 15 and change the position to B2.

D. the tower bar falls after rise: left hand unclamps two-position three-way hand change valve 15 handles, and two-position three-way hand change valve 15 guiding valves are reset to the B1 position under the effect of spring.3 guiding valves of change-over valve among the figure are moved on to the C1 position, the check valve 14 of pressure oil in two-position three-way hand change valve 15 and sequence valve enters part hydraulic ram 1 ante-chamber, hydraulic cylinder piston rod is descending, working substance falls, this moment is because pressure regulating valve 12 has been passed through in the oil return of hydraulic ram back cavity, falling speed determined by the given pressure of pressure regulating valve 12 fully, and this given pressure is exactly the back pressure that the tower bar falls, and makes working substance fall to being controlled at safety speed.

Claims (2)

1. hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system, include pressure-control circuit, throttle circuit, actuating unit backpressure circuit and differential back pressure stack loop, the front/back cavity that described actuating unit backpressure circuit includes hydraulic ram and hydraulic ram all is connected with sequence valve, and described sequence valve includes pressure regulating valve, check valve in parallel; The sequence valve that described front/back cavity is connecting is connecting change-over valve jointly, change-over valve is connecting flow regulating valve, the first check valve in the throttle circuit, throttle circuit is connected to fuel tank, is provided with pressure-control circuit between throttle circuit and the fuel tank, and pressure-control circuit includes by pass valve, compression indicator; It is characterized in that: described differential back pressure stack loop includes manual two-position three-way valve, the second check valve, manually the reset position of two-position three-way valve is connected the ante-chamber of hydraulic ram, manually the differential position of two-position three-way valve and the second check valve are connected, and the second check valve is connected to the sequence valve of the back cavity of hydraulic ram.
2. hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system according to claim 1, its feature exists: described change-over valve is the 3-position 4-way hand change over valve.
CN 201010271263 2010-09-01 2010-09-01 Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system CN101982399B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010271263 CN101982399B (en) 2010-09-01 2010-09-01 Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system

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Application Number Priority Date Filing Date Title
CN 201010271263 CN101982399B (en) 2010-09-01 2010-09-01 Hydraulic lift independent iron tower rod differential superposition back-pressure hydraulic system

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CN101982399B true CN101982399B (en) 2013-02-20

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103047216A (en) * 2012-12-25 2013-04-17 华菱星马汽车(集团)股份有限公司 Pressure induction regeneration balance valve device for crane telescopic boom cylinder
CN103267041B (en) * 2013-05-31 2016-02-03 潍坊亿宏重工机械有限公司 Constant pressure oil cylinder
CN104314892A (en) * 2014-09-18 2015-01-28 芜湖高昌液压机电技术有限公司 Bypass throttling governing loop for lifting machine
CN105645324A (en) * 2016-04-18 2016-06-08 湖南五新隧道智能装备股份有限公司 Cantilever crane motion hydraulic system and tunnel lagging jack operating vehicle
CN110255460A (en) * 2019-07-07 2019-09-20 中科聚信洁能热锻装备研发股份有限公司 A kind of fluid power system and its control method of weight roll-over table

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002317801A (en) * 2001-04-20 2002-10-31 Kawasaki Heavy Ind Ltd Hydraulic differential gear
JP2007247701A (en) * 2006-03-14 2007-09-27 Yanmar Co Ltd Hydraulic device
CN101135326A (en) * 2007-09-26 2008-03-05 中南大学 Giant-scale hydraulic press synchronous balancing hydraulic circuit
CN101315088A (en) * 2008-07-17 2008-12-03 江苏科行环境工程技术有限公司 Horizontal roller hydraulic circuit system with pressure-relief protection function
CN101718284A (en) * 2009-12-09 2010-06-02 中国重型机械研究院有限公司 Composite control hydraulic system for frame beam

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002317801A (en) * 2001-04-20 2002-10-31 Kawasaki Heavy Ind Ltd Hydraulic differential gear
JP2007247701A (en) * 2006-03-14 2007-09-27 Yanmar Co Ltd Hydraulic device
CN101135326A (en) * 2007-09-26 2008-03-05 中南大学 Giant-scale hydraulic press synchronous balancing hydraulic circuit
CN101315088A (en) * 2008-07-17 2008-12-03 江苏科行环境工程技术有限公司 Horizontal roller hydraulic circuit system with pressure-relief protection function
CN101718284A (en) * 2009-12-09 2010-06-02 中国重型机械研究院有限公司 Composite control hydraulic system for frame beam

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