CN101532518B - Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device - Google Patents

Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device Download PDF

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Publication number
CN101532518B
CN101532518B CN2009101166075A CN200910116607A CN101532518B CN 101532518 B CN101532518 B CN 101532518B CN 2009101166075 A CN2009101166075 A CN 2009101166075A CN 200910116607 A CN200910116607 A CN 200910116607A CN 101532518 B CN101532518 B CN 101532518B
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cover
plate type
valve
type cartridge
cartridge valve
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CN2009101166075A
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CN101532518A (en
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陆远望
钱家忠
余正茂
朱保江
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安徽星马汽车股份有限公司
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Abstract

The invention provides a concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device, which belongs to hydraulic device, and is characterized in that a accessory valve block with built-in oil way and corresponding interface is arranged on a oil way between a main valve block and a main oil cylinder I and a main oil cylinder II, namely on a main hydraulic pipeline I and a main hydraulic pipeline II, two two-position four-way electromagnetic directional valves and six cover plate type cartridge valves are arranged on the accessory valve block and are respectively connected through oil way, the six cover plate type cartridge valves are respectively connected with the main oil cylinder I, the main oil cylinder II and the main hydraulic pipeline through oil way, on-off state of the six cover plate type cartridge valves is controlled by the on-off of the two two-position four-way electromagnetic directional valves, thereby realizing equidirectional telescoping and automatic high-low pressure switching of pumping double-main oil cylinder. The invention has advantages of reasonable structure, convenient operation, on-linen switching, no system leakage, convenient inspection, and labor-saving and time-saving for changing concrete piston.

Description

The automatic high low pressure of the two master cylinders of concrete pump truck pumping switches and telescoping hydraulic device in the same way
Technical field
The invention belongs to hydraulic pressure installation, relate in particular to a kind of pumps hydraulic device of concrete mixer.
Background technique
At present, the concrete pump truck pumping hydraulic system is typically equipped with high-low voltage switching device, but it is high, switching between the low pressure pumping is realized by the hand operating mechanism hydraulic valve block, promptly pull down the screw on the hydraulic valve block, rotary machine switches cover plate, finish height, switch between the low pressure pumping, this device is when switching, on the one hand that main frame is flame-out, length consuming time on the other hand, and also have hydraulic oil to drop down from junction plane, if pressure has not been let out, also easily the sealing O shape of junction plane circle is damaged, can't realize also that in addition two master cylinders of pumps hydraulic system are flexible in the same way, this debugging and concrete piston to the pumps hydraulic system is checked and the concrete piston, the pumping master cylinder, the replacing of concrete cylinder brings great inconvenience.
Summary of the invention
The purpose of this invention is to provide that the automatic high low pressure of the two master cylinders of a kind of concrete pump truck pumping switches and telescoping hydraulic device in the same way, can easily switch between pumping system low pressure, high pressure conditions, need not stop main frame, the time is short, and system does not have any leakage; The concrete mixer master cylinder is flexible in the same way, can check or change concrete piston, saving of work and time easily; Make that simultaneously whole hydraulic system is more perfect, need of work is satisfied in hommization better.
The object of the present invention is achieved like this: the automatic high low pressure of the two master cylinders of a kind of concrete pump truck pumping switches and telescoping hydraulic device in the same way, by in hydraulic system, setting up two two four-way electromagnetic reversing valves, six cover-plate type cartridge valves, by two two four-way electromagnetic reversing valves, dead electricity, and then control the keying state of six cover-plate type cartridge valves, realize two master cylinders of pumps hydraulic system flexible in the same way and automatically high low pressure switch.
The automatic high low pressure of the two master cylinders of a kind of concrete pump truck pumping switches and telescoping hydraulic device in the same way, mainly by hydraulic oil container, main oil pump, the main valve piece, main hydraulic pipe line I, main hydraulic pipe line II, master cylinder I, master cylinder II and return filter are formed, it is characterized in that: at main valve piece and master cylinder I, on the oil circuit between the master cylinder II, promptly on main hydraulic pipe line I and main hydraulic pipe line II, set up inside and offer oil circuit and the corresponding secondary valve piece that interface is set, the board-like cartridge valve I of mounting cover successively from left to right at the middle part on secondary valve piece surface, cover-plate type cartridge valve II, cover-plate type cartridge valve III and cover-plate type cartridge valve IV, board-like cartridge valve V of mounting cover and cover-plate type cartridge valve VI successively from the bottom to top on the top on secondary valve piece surface install two four-way electromagnetic reversing valve I and two four-way electromagnetic reversing valve II respectively on the left side and the right side of the bottom on secondary valve piece surface; The control port of the A mouth of two four-way electromagnetic reversing valve I and cover-plate type cartridge valve I links to each other by the oil circuit of secondary valve piece inside, and the control port of the B mouth of two four-way electromagnetic reversing valve I and cover-plate type cartridge valve II, cover-plate type cartridge valve V links to each other by the oil circuit of secondary valve piece inside; The A mouth of two four-way electromagnetic reversing valve II and cover-plate type cartridge valve IV, the control port of cover-plate type cartridge valve VI links to each other by the oil circuit of secondary valve piece inside, the control port of the B mouth of two four-way electromagnetic reversing valve II and cover-plate type cartridge valve III links to each other by the oil circuit of secondary valve piece inside, the P mouth of two four-way electromagnetic reversing valve I and two four-way electromagnetic reversing valve II links to each other with main hydraulic pipe line II and system pressure hydraulic pipe line with main hydraulic pipe line I by one-way valve is corresponding respectively, returns hydraulic oil container after two four-way electromagnetic reversing valve I link to each other with the T mouth of two four-way electromagnetic reversing valve II; In secondary valve piece left side, the rod chamber of master cylinder I links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve I and the left side hydraulic fluid port of cover-plate type cartridge valve V with hydraulic pipe line IV, the rodless cavity of master cylinder I links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve III and the upside hydraulic fluid port of cover-plate type cartridge valve VI with hydraulic pipe line III, on secondary valve piece right side, the rod chamber of master cylinder II links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve IV and the upside hydraulic fluid port of cover-plate type cartridge valve V with hydraulic pipe line VI, and the rodless cavity of master cylinder II links to each other with cover-plate type cartridge valve VI left side hydraulic fluid port with cover-plate type cartridge valve II upside hydraulic fluid port with hydraulic pipe line V; Main hydraulic pipe line I links to each other with the right side hydraulic fluid port of cover-plate type cartridge valve I and the left side hydraulic fluid port of cover-plate type cartridge valve II, and main hydraulic pipe line II links to each other with the right side hydraulic fluid port of cover-plate type cartridge valve III and the left side hydraulic fluid port of cover-plate type cartridge valve IV.
During work, when the electromagnet of two four-way electromagnetic reversing valve I and two four-way electromagnetic reversing valve II all must not electricity, cover-plate type cartridge valve I, cover-plate type cartridge valve IV and cover-plate type cartridge valve VI open, cover-plate type cartridge valve II, cover-plate type cartridge valve III, cover-plate type cartridge valve V closes, the pressure oil of system is successively through main hydraulic pipe line I, cover-plate type cartridge valve I, hydraulic pipe line IV enters the rod chamber of master cylinder I, the hydraulic oil of master cylinder I rodless cavity is successively through hydraulic pipe line III, cover-plate type cartridge valve VI, hydraulic pipe line V enters the rodless cavity of master cylinder II, the hydraulic oil of the rod chamber of master cylinder II is successively through hydraulic pipe line VI, cover-plate type cartridge valve IV, main hydraulic pipe line II flows back to fuel tank by main valve piece 3, and this kind state is called the low pressure pumping; When the electromagnet of two four-way electromagnetic reversing valve I and two four-way electromagnetic reversing valve II all gets when electric, cover-plate type cartridge valve II, cover-plate type cartridge valve III, cover-plate type cartridge valve V opens, cover-plate type cartridge valve I, cover-plate type cartridge valve IV, cover-plate type cartridge valve VI closes, the pressure oil of system is successively through main hydraulic pipe line I, cover-plate type cartridge valve II, hydraulic pipe line V enters the rodless cavity of master cylinder II, the hydraulic oil of master cylinder II rod chamber is through hydraulic pipe line VI, cover-plate type cartridge valve V, hydraulic pipe line IV enters the rod chamber of master cylinder I, the hydraulic oil of the rodless cavity of master cylinder I is successively through hydraulic pipe line III, cover-plate type cartridge valve III, main hydraulic pipe line II flows back to fuel tank by main valve piece 3, and this kind state is called the high pressure pumping; The high low pressure state of concrete pump truck pumping system: the rodless cavity of two master cylinders is communicated with, and rod chamber oil-feed, oil return are called the low pressure pumping; The rod chamber of two master cylinders is communicated with, and rodless cavity oil-feed, oil return are called the high pressure pumping; When two four-way electromagnetic reversing valve I get, two four-way electromagnetic reversing valve II must not, cover-plate type cartridge valve II, cover-plate type cartridge valve IV, cover-plate type cartridge valve V, cover-plate type cartridge valve VI open, cover-plate type cartridge valve I, cover-plate type cartridge valve III close, and pressure oil enters the rodless cavity of master cylinder I and master cylinder II successively simultaneously through main hydraulic pipe line I, cover-plate type cartridge valve II, cover-plate type cartridge valve VI; The hydraulic oil of the rod chamber of master cylinder I and master cylinder II flows back to hydraulic oil container through the main valve piece to reply again through hydraulic pipe line IV, cover-plate type cartridge valve V, hydraulic pipe line VI, cover-plate type cartridge valve IV and main hydraulic pipe line II, and master cylinder I and master cylinder II stretch out in the same way; Enter the rod chamber of master cylinder I and master cylinder II simultaneously through main hydraulic pipe line II, cover-plate type cartridge valve IV, cover-plate type cartridge valve V, hydraulic pipe line IV, hydraulic pipe line VI when the pressure oil correspondence, the hydraulic oil correspondence of the rodless cavity of master cylinder I and master cylinder II flows back to hydraulic oil container through hydraulic pipe line III, hydraulic pipe line V, cover-plate type cartridge valve VI, cover-plate type cartridge valve II and main hydraulic pipe line I through the main valve piece, and master cylinder I and master cylinder II withdraw in the same way; Operation main valve piece, main hydraulic pipe line I, main hydraulic pipe line II are alternately into and out of oil.
The automatic high low pressure of the two master cylinders of concrete pump truck pumping proposed by the invention switches and telescoping hydraulic device is rational in infrastructure in the same way, and is easy to operate, can easily switch between pumping system low pressure, high pressure conditions, need not stop main frame, and the time is short, and system does not have any leakage; The concrete mixer master cylinder is flexible in the same way, can check, change concrete piston, saving of work and time easily; Make that in the same way whole hydraulic system is more perfect, need of work is satisfied in hommization better.
The automatic high low pressure of the two master cylinders of concrete pump truck pumping that the present invention is proposed below in conjunction with drawings and Examples switch and in the same way telescoping hydraulic device be described further.
Description of drawings
Fig. 1 is that the automatic high low pressure of the two master cylinders of concrete pump truck pumping proposed by the invention switches and the hydraulic schematic diagram of telescoping hydraulic device in the same way.
Among Fig. 1: 1, hydraulic oil container 2, main oil pump 3, main valve piece 4, main hydraulic pipe line I5, secondary valve piece 6, master cylinder I 7, master cylinder II 8, main hydraulic pipe line II 9, two four-way electromagnetic reversing valve I 10, two four-way electromagnetic reversing valve II 11, cover-plate type cartridge valve I 12, cover-plate type cartridge valve II 13, cover-plate type cartridge valve III 14, cover-plate type cartridge valve IV 15, cover-plate type cartridge valve V 16, cover-plate type cartridge valve VI 17, hydraulic pipe line III18, hydraulic pipe line IV 19, hydraulic pipe line V 20, hydraulic pipe line VI 21, return filter
Embodiment
As can be seen from Figure 1: the automatic high low pressure of the two master cylinders of a kind of concrete pump truck pumping switches and telescoping hydraulic device in the same way, mainly by hydraulic oil container 1, main oil pump 2, main valve piece 3, main hydraulic pipe line I 4, main hydraulic pipe line II 8, master cylinder I 6, master cylinder II 7 and return filter 21 are formed, it is characterized in that: at main valve piece 3 and master cylinder I 6, promptly on main hydraulic pipe line I 4 and main hydraulic pipe line II 8, set up inside on the oil circuit between the master cylinder II 7 and offered oil circuit and the corresponding secondary valve piece 5 that is provided with interface, cover-plate type cartridge valve I 11 has been installed at middle part on secondary valve piece 5 surfaces from left to right successively, cover-plate type cartridge valve II 12, cover-plate type cartridge valve III 13 and cover-plate type cartridge valve IV 14, board-like cartridge valve V 15 of mounting cover and cover-plate type cartridge valve VI 16 successively from the bottom to top on the top on secondary valve piece 5 surfaces install two four-way electromagnetic reversing valve I 9 and two four-way electromagnetic reversing valve II 10 respectively on the left side and the right side of the bottom on secondary valve piece 5 surfaces; Oil circuit by secondary valve piece 5 inside between the control port of the A mouth of two four-way electromagnetic reversing valve I 9 and cover-plate type cartridge valve I 11 links to each other, oil circuit by secondary valve piece 5 inside between the control port of the B mouth of two four-way electromagnetic reversing valve I 9 and cover-plate type cartridge valve II 12 and the control port of cover-plate type cartridge valve V 15 links to each other, oil circuit by secondary valve piece 5 inside between the control port of the A mouth of two four-way electromagnetic reversing valve II 10 and cover-plate type cartridge valve IV 14 and the control port of cover-plate type cartridge valve VI 16 links to each other, oil circuit by secondary valve piece 5 inside between the control port of the B mouth of two four-way electromagnetic reversing valve II 10 and cover-plate type cartridge valve III 13 links to each other, two four-way electromagnetic reversing valve I 9, the P mouth of two four-way electromagnetic reversing valve II 10 is corresponding respectively and main hydraulic pipe line I 4 by one-way valve, main hydraulic pipe line II 8 and system pressure hydraulic pipe line link to each other, this one-way valve plays the dual fail-safe effect on control oil channel, return hydraulic oil container 1 after the T mouth of two four-way electromagnetic reversing valve I 9 and two four-way electromagnetic reversing valve II 10 links to each other; In secondary valve piece 5 left sides, the rod chamber of master cylinder I 6 links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve I 11 and the left side hydraulic fluid port of cover-plate type cartridge valve V 15 with hydraulic pipe line IV 18, the rodless cavity of master cylinder I 6 links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve III 13 and the upside hydraulic fluid port of cover-plate type cartridge valve VI 16 with hydraulic pipe line III 17, on secondary valve piece 5 right sides, the rod chamber of master cylinder II 7 links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve IV 14 and the upside hydraulic fluid port of cover-plate type cartridge valve V15 with hydraulic pipe line VI 20, and the rodless cavity of master cylinder II 7 links to each other with cover-plate type cartridge valve VI 16 left side hydraulic fluid ports with cover-plate type cartridge valve II12 upside hydraulic fluid port with hydraulic pipe line V 19; Main hydraulic pipe line I 4 links to each other with the right side hydraulic fluid port of cover-plate type cartridge valve I 11 and the left side hydraulic fluid port of cover-plate type cartridge valve II 12, and main hydraulic pipe line II 8 links to each other with the right side hydraulic fluid port of cover-plate type cartridge valve III 13 and the left side hydraulic fluid port of cover-plate type cartridge valve IV 14.
During work, when the electromagnet of two four-way electromagnetic reversing valve I 9 and two four-way electromagnetic reversing valve II 10 all must not electricity, the P of two four-way electromagnetic reversing valve I 9 leads to B, A leads to T, the P of two four-way electromagnetic reversing valve II 10 leads to B, A leads to T, and the control oil of cover-plate type cartridge valve I 11, cover-plate type cartridge valve IV 14, cover-plate type cartridge valve VI 16 takes back fuel tank, and cover-plate type cartridge valve I 11, cover-plate type cartridge valve IV 14 and cover-plate type cartridge valve VI 16 open; Cover-plate type cartridge valve II 12, the control oil welding system pressure oil of cover-plate type cartridge valve III 13 and cover-plate type cartridge valve V 15, cover-plate type cartridge valve II 12, cover-plate type cartridge valve III 13, cover-plate type cartridge valve V 15 closes, the pressure oil of system is successively through main hydraulic pipe line I 4, the right side hydraulic fluid port of cover-plate type cartridge valve I11 is to the upside hydraulic fluid port, hydraulic pipe line IV 18 enters the rod chamber of master cylinder I 6, and the hydraulic oil of master cylinder I 6 rodless cavities is through hydraulic pipe line III 17, the upside hydraulic fluid port of cover-plate type cartridge valve VI 16 enters the rodless cavity of master cylinder II 7 through hydraulic pipe line V 19 to the left side hydraulic fluid port; The hydraulic oil of the rod chamber of master cylinder II 7 again by main valve piece 3 flows back to hydraulic oil container 1 to the left side hydraulic fluid port through main hydraulic pipe line II 8 through the upside hydraulic fluid port through hydraulic pipe line VI 20, cover-plate type cartridge valve IV 14, and this kind state is called the low pressure pumping; When the electromagnet of two four-way electromagnetic reversing valve I 9 and two four-way electromagnetic reversing valve II 10 all gets when electric, the P of two four-way electromagnetic reversing valve I 9 leads to A, B leads to T, the P of two four-way electromagnetic reversing valve II 10 leads to A, B leads to T, the control oil of cover-plate type cartridge valve II 12, cover-plate type cartridge valve III 13, cover-plate type cartridge valve V 15 takes back fuel tank, and cover-plate type cartridge valve II 12, cover-plate type cartridge valve III 13, cover-plate type cartridge valve V 15 open; Cover-plate type cartridge valve I 11, cover-plate type cartridge valve IV 14, the control oil welding system pressure oil of cover-plate type cartridge valve VI 16, cover-plate type cartridge valve I 11, cover-plate type cartridge valve IV 14, cover-plate type cartridge valve VI 16 closes, the pressure oil of system is successively through main hydraulic pipe line I 4, the left side hydraulic fluid port of cover-plate type cartridge valve II 12 is to the upside hydraulic fluid port, hydraulic pipe line V 19 enters the rodless cavity of master cylinder II 7, the hydraulic oil of master cylinder II 7 rod chambers is successively through hydraulic pipe line VI 20, the upside hydraulic fluid port of cover-plate type cartridge valve V 15 is to the left side hydraulic fluid port, hydraulic pipe line IV 18 enters the rod chamber of master cylinder I 6, the hydraulic oil of the rodless cavity of master cylinder I 6 is successively through hydraulic pipe line III 17, the upside hydraulic fluid port of cover-plate type cartridge valve III 13 is to the right side hydraulic fluid port, main hydraulic pipe line II 8 flows back to hydraulic oil container 1 by main valve piece 3 again, and this kind state is called the high pressure pumping; The high low pressure state of concrete pump truck pumping system: the rodless cavity of two master cylinders is communicated with, and rod chamber oil-feed, oil return are called the low pressure pumping; The rod chamber of two master cylinders is communicated with, and rodless cavity oil-feed, oil return are called the high pressure pumping; When two four-way electromagnetic reversing valve I 9 get, when two four-way electromagnetic reversing valve II 10 must not electricity, the P of two four-way electromagnetic reversing valve I 9 leads to A, B leads to T, the P of two four-way electromagnetic reversing valve II 10 leads to B, A leads to T, and the control oil of cover-plate type cartridge valve II 12, cover-plate type cartridge valve IV 14, cover-plate type cartridge valve V 15, cover-plate type cartridge valve VI 16 takes back fuel tank; Cover-plate type cartridge valve II 12, cover-plate type cartridge valve IV 14, cover-plate type cartridge valve V 15, cover-plate type cartridge valve VI 16 open, and cover-plate type cartridge valve I 11, cover-plate type cartridge valve III 13 close; Pressure oil is successively through main hydraulic pipe line I 4, the left side hydraulic fluid port of cover-plate type cartridge valve II 12 is to the upside hydraulic fluid port, the left side hydraulic fluid port of cover-plate type cartridge valve VI 16 is to the upside hydraulic fluid port, through hydraulic pipe line III17, V 19 enters the rodless cavity of master cylinder I 6 and master cylinder II 7 simultaneously, the hydraulic oil correspondence of the rod chamber of master cylinder I 6 and master cylinder II 7 is through hydraulic pipe line IV 18, the left side hydraulic fluid port of cover-plate type cartridge valve V 15 is to the upside hydraulic fluid port, hydraulic pipe line VI20, the upside hydraulic fluid port of cover-plate type cartridge valve IV 14 is to the left side hydraulic fluid port, main hydraulic pipe line II 8 flows back to hydraulic oil container 1 through main valve piece 3 again, and master cylinder I 6 and master cylinder II 7 stretch out in the same way; The pressure oil correspondence enters the rod chamber of master cylinder I 6 and master cylinder II 7 simultaneously to left side hydraulic fluid port, hydraulic pipe line IV 18, hydraulic pipe line VI20 to the upside hydraulic fluid port of upside hydraulic fluid port, cover-plate type cartridge valve V 15 through the left side hydraulic fluid port of main hydraulic pipe line II 8, cover-plate type cartridge valve IV 14; The hydraulic oil of the rodless cavity of master cylinder I 6 and master cylinder II 7 again through main valve piece 3 flows back to hydraulic oil container 1 to the upside hydraulic fluid port of left side hydraulic fluid port, cover-plate type cartridge valve II 12 to left side hydraulic fluid port, main hydraulic pipe line I 4 through the upside hydraulic fluid port of hydraulic pipe line III 17, hydraulic pipe line V19, cover-plate type cartridge valve VI 16, finishes master cylinder I6 and master cylinder II 7 and withdraws in the same way.

Claims (1)

1. the automatic high low pressure of the two master cylinders of a concrete pump truck pumping switches and telescoping hydraulic device in the same way, mainly form, it is characterized in that by hydraulic oil container (1), main oil pump (2), main valve piece (3), main hydraulic pipe line I (4), main hydraulic pipe line II (8), master cylinder I (6), master cylinder II (7) and return filter (21):
A, at main valve piece (3) and master cylinder I (6), promptly on main hydraulic pipe line I (4) and main hydraulic pipe line II (8), set up inside on the oil circuit between the master cylinder II (7) and offered oil circuit and the corresponding secondary valve piece (5) that is provided with interface, cover-plate type cartridge valve I (11) has been installed at middle part on secondary valve piece (5) surface from left to right successively, cover-plate type cartridge valve II (12), cover-plate type cartridge valve III (13) and cover-plate type cartridge valve IV (14), the board-like cartridge valve V of mounting cover (15) and cover-plate type cartridge valve VI (16) successively from the bottom to top on the top on secondary valve piece (5) surface install two four-way electromagnetic reversing valve I (9) and two four-way electromagnetic reversing valve II (10) respectively on the left side and the right side of the surperficial bottom of secondary valve piece (5);
B, link to each other by the inner oil circuit of secondary valve piece (5) between the control port of the A mouth of two four-way electromagnetic reversing valve I (9) and cover-plate type cartridge valve I (11), link to each other by the inner oil circuit of secondary valve piece (5) between the control port of the B mouth of two four-way electromagnetic reversing valve I (9) and cover-plate type cartridge valve II (12) and the control port of cover-plate type cartridge valve V (15), link to each other by the inner oil circuit of secondary valve piece (5) between the control port of the A mouth of two four-way electromagnetic reversing valve II (10) and cover-plate type cartridge valve IV (14) and cover-plate type cartridge valve VI (16), link to each other by the inner oil circuit of secondary valve piece (5) between the control port of the B mouth of two four-way electromagnetic reversing valve II (10) and cover-plate type cartridge valve III (13), two four-way electromagnetic reversing valve I (9), the P mouth of two four-way electromagnetic reversing valve II (10) is corresponding respectively and main hydraulic pipe line I (4) by one-way valve, main hydraulic pipe line II (8) and system pressure hydraulic pipe line link to each other, and return hydraulic oil container (1) after the T mouth of two four-way electromagnetic reversing valve I (9) and two four-way electromagnetic reversing valve II (10) links to each other;
C, in secondary valve piece (5) left side, the rod chamber of master cylinder I (6) links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve I (11) and the left side hydraulic fluid port of cover-plate type cartridge valve V (15) with hydraulic pipe line IV (18), the rodless cavity of master cylinder I (6) links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve III (13) and the upside hydraulic fluid port of cover-plate type cartridge valve VI (16) with hydraulic pipe line III (17), on secondary valve piece (5) right side, the rod chamber of master cylinder II (7) links to each other with the upside hydraulic fluid port of cover-plate type cartridge valve IV (14) and the upside hydraulic fluid port of cover-plate type cartridge valve V (15) with hydraulic pipe line VI (20), and the rodless cavity of master cylinder II (7) links to each other with cover-plate type cartridge valve VI (16) left side hydraulic fluid port with cover-plate type cartridge valve II (12) upside hydraulic fluid port with hydraulic pipe line V (19);
D, main hydraulic pipe line I (4) link to each other with the right side hydraulic fluid port of cover-plate type cartridge valve I (11) and the left side hydraulic fluid port of cover-plate type cartridge valve II (12), and main hydraulic pipe line II (8) links to each other with the right side hydraulic fluid port of cover-plate type cartridge valve III (13) and the left side hydraulic fluid port of cover-plate type cartridge valve IV (14).
CN2009101166075A 2009-04-18 2009-04-18 Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device CN101532518B (en)

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Application Number Priority Date Filing Date Title
CN2009101166075A CN101532518B (en) 2009-04-18 2009-04-18 Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device

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Application Number Priority Date Filing Date Title
CN2009101166075A CN101532518B (en) 2009-04-18 2009-04-18 Concrete pump truck pumping double-main oil cylinder automatic high-low pressure switching and equidirectional telescoping hydraulic device

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CN101532518B true CN101532518B (en) 2011-02-16

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102465934B (en) * 2010-11-12 2014-04-16 北汽福田汽车股份有限公司 Hydraulic system
CN102478031B (en) * 2010-11-22 2015-09-09 北汽福田汽车股份有限公司 Switching valve and pumping system
CN102094864A (en) * 2011-03-23 2011-06-15 李新桥 Hydraulic valve for pile pressing control for pile pressing machine
CN102410185B (en) * 2011-09-15 2015-06-17 北京市三一重机有限公司 Plunger type high-pressure water pump system and high and low-pressure mode switching method thereof
CN102705226B (en) * 2012-07-05 2015-08-19 中联重科股份有限公司 Pumping installations and comprise the pumping equipment of this pumping installations
CN103557196B (en) * 2013-11-14 2015-09-02 山推楚天工程机械有限公司 The two-way converging valve group of a kind of double pump for concrete arm support pumper and application
CN103836020B (en) * 2014-03-21 2016-09-14 徐州徐工施维英机械有限公司 The high-low pressure switching system of a kind of concrete pump and concrete pump
CN104088839B (en) * 2014-05-26 2019-07-02 飞翼股份有限公司 A kind of pressure difference transmitting device, closed type hydraulic system and mining conveyer for emptying warehouse
CN104154061A (en) * 2014-07-10 2014-11-19 厦门理工学院 Novel concrete pumping mechanism

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