CN111140559B - Multi-section-arm sequential telescopic hydraulic system - Google Patents
Multi-section-arm sequential telescopic hydraulic system Download PDFInfo
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- CN111140559B CN111140559B CN202010018039.1A CN202010018039A CN111140559B CN 111140559 B CN111140559 B CN 111140559B CN 202010018039 A CN202010018039 A CN 202010018039A CN 111140559 B CN111140559 B CN 111140559B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/20—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members
- F15B11/205—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors controlling several interacting or sequentially-operating members the position of the actuator controlling the fluid flow to the subsequent actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
Abstract
The invention discloses a multi-arm sequential telescopic hydraulic system, which belongs to the technical field of cranes and comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder and a fifth hydraulic cylinder which have the same structure and are respectively provided with 1 two-position two-way manual reversing valve on a hydraulic cylinder cover, wherein different sixth hydraulic cylinders are arranged; the first hydraulic cylinder is connected with the three-position four-way reversing valve through an oil pipe; the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder and the sixth hydraulic cylinder are sequentially connected through oil pipes. The invention can realize the following by skillfully designing the cylinder body structure and the whole hydraulic system: when the suspension arm extends out, the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder and the sixth hydraulic cylinder extend out in sequence; when the suspension arm retracts, the sixth hydraulic cylinder, the fifth hydraulic cylinder, the fourth hydraulic cylinder, the third hydraulic cylinder, the second hydraulic cylinder and the first hydraulic cylinder sequentially retract.
Description
Technical Field
The invention relates to the technical field of cranes, in particular to a multi-section-arm sequential telescopic hydraulic system.
Background
The lorry-mounted crane is a multiple combined action hoisting machine which is installed on a chassis of a large transport vehicle and can realize horizontal transportation and vertical hoisting of objects within a certain range, is also called a lorry-mounted crane, and is novel efficient hoisting and transporting equipment integrating comprehensive hoisting and transportation. In recent years, the lorry-mounted crane has the characteristics of rapidness, convenience and integrated transportation, loading and unloading functions, and is gradually accepted and accepted by a large number of users. At present, lorry-mounted cranes are widely used in the fields of transportation, civil engineering and the like during cargo loading and unloading and short-distance transfer, and the improved products have wider application range after various additional devices are added. The telescopic mode of the suspension arm of the lorry-mounted crane can be divided into the following modes according to the principle: the sequential telescopic hydraulic control system has the advantages and disadvantages of a sequential telescopic mechanism, a synchronous telescopic mechanism, an independent telescopic mechanism and a combined telescopic mechanism, the four mechanisms have good and bad advantages and application ranges, the number of the booms of the lorry-mounted crane with medium and large tonnage is generally more than 5, and the sequential telescopic mechanism has great advantages in medium and large tonnage equipment, so that the research on the sequential telescopic hydraulic control system has great significance for improving the performance of the lorry-mounted crane.
Disclosure of Invention
The invention provides a multi-section boom sequential telescopic hydraulic system, and provides a hydraulic control system capable of realizing sequential telescopic of 6 sections of booms aiming at a boom telescopic hydraulic system.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a multi-arm sequential telescopic hydraulic system comprises a first hydraulic cylinder, a second hydraulic cylinder, a third hydraulic cylinder, a fourth hydraulic cylinder and a fifth hydraulic cylinder which have the same structure and are respectively provided with 1 two-position two-way manual reversing valve on a hydraulic cylinder cover, wherein different sixth hydraulic cylinders are arranged; an A1 oil port formed in the bottom of the first cylinder body on one side of a first rodless cavity of the first hydraulic cylinder is connected with one oil port of the three-position four-way reversing valve through an oil pipe, and a B1 oil port formed in the first cylinder cover on one side of the first rodless cavity is connected with the other oil port of the three-position four-way reversing valve through an oil pipe;
an A2 oil port formed in the bottom of the second cylinder body on one side of a second rodless cavity of the second hydraulic cylinder is connected with a C1 oil port formed in a first piston of the first hydraulic cylinder through a first core tube and an oil tube inside a first piston rod of the first hydraulic cylinder, a B2 oil port formed in a second cylinder cover on one side of a second rodless cavity of the second hydraulic cylinder is connected with a D1 oil port formed in the first piston rod of the first hydraulic cylinder through a first core tube and an oil tube inside the first piston rod of the first hydraulic cylinder, a B2 oil port formed in the second cylinder cover on one side of the second rodless cavity is also communicated with a second rodless cavity of the second hydraulic cylinder through a two-position manual reversing valve, a D2 oil port formed in the second piston rod is communicated with a B2 oil port on the second cylinder cover on one side of the second rodless cavity when the second piston rod is completely extended, a C2 oil port formed in the second piston is communicated with an F2 oil port in a second U-shaped tail hole groove of the second rodless cavity of the second hydraulic cylinder, which is close to the tail section, another E2 oil port in the second U-shaped hole groove is communicated with the second rodless cavity after the second piston rod is completely stretched out;
an A3 oil port formed in the bottom of a third cylinder body on one side of a third rodless cavity of the third hydraulic cylinder is connected with an oil C2 oil port formed in a second piston of the second hydraulic cylinder through a second core tube and an oil tube inside a second piston rod of the second hydraulic cylinder, an oil B3 oil port formed in a third cylinder cover on one side of a third rodless cavity of the third hydraulic cylinder is connected with an oil D2 oil port formed in the second piston rod of the second hydraulic cylinder through a second core tube and the oil tube inside the second piston rod of the second hydraulic cylinder, an oil B3 oil port formed in a third cylinder cover on one side of the third rodless cavity is also communicated with a third rodless cavity of the third hydraulic cylinder through a third two-position two-way manual reversing valve, an oil D3 oil port formed in the third piston rod is communicated with an oil B3 oil port formed in the third cylinder cover on one side close to the third rodless cavity when the third piston rod is completely extended, and an oil C3 oil port formed in the third piston is communicated with a U3F 3 oil port groove in a third rodless cavity close to the tail section of the third rodless cavity of the third hydraulic cylinder, another E3 oil port in the third U-shaped hole groove is communicated with the third rodless cavity after the third piston rod is completely stretched out;
an A4 oil port formed in the bottom of a fourth cylinder body on one side of a fourth rodless cavity of the fourth hydraulic cylinder is connected with a C3 oil port formed in a third piston of the third hydraulic cylinder through a first core tube III and an oil tube inside a third piston rod of the third hydraulic cylinder, a B4 oil port formed in a fourth cylinder cover on one side of a fourth rodless cavity of the fourth hydraulic cylinder is connected with a D3 oil port formed in the third piston rod of the third hydraulic cylinder through a second core tube III and an oil tube inside the third piston rod of the third hydraulic cylinder, a B4 oil port formed in a fourth cylinder cover on one side of a fourth rodless cavity is also communicated with a fourth rodless cavity of the fourth hydraulic cylinder through a fourth two-position manual reversing valve, a D4 oil port formed in the fourth piston rod is communicated with a B4 oil port formed in the fourth cylinder cover on one side close to the fourth rodless cavity when the fourth piston rod is completely extended, a C4 oil port formed in the fourth piston is communicated with a fourth U4 oil port groove in a fourth rodless cavity, which is close to the end section of the extended type oil port of the fourth rodless cavity, another E4 oil port in the fourth U-shaped hole groove is communicated with the fourth rodless cavity after the fourth piston rod is completely stretched out;
an A5 oil port formed in the bottom of a fifth cylinder body on one side of a fifth rodless cavity of the fifth hydraulic cylinder is connected with a C4 oil port formed in a fourth piston of the fourth hydraulic cylinder through a first core pipe and an oil pipe in the fourth piston rod of the fourth hydraulic cylinder; a B5 oil port formed in the fifth cylinder cover on one side of the fifth rod cavity is connected with a D4 oil port formed in the fourth piston rod of the fourth hydraulic cylinder through a second core tube IV and an oil pipe in the fourth piston rod of the fourth hydraulic cylinder, and a B5 oil port formed in the fifth cylinder cover on one side of the fifth rod cavity is also communicated with the fifth rod cavity of the fifth hydraulic cylinder through a fifth two-position two-way manual reversing valve; a D5 oil port formed in the fifth piston rod is communicated with a B5 oil port on the fifth cylinder cover close to one side of the fifth rod-containing cavity when the fifth piston rod is completely extended, a C5 oil port formed in the fifth piston is communicated with an F5 oil port in a fifth U-shaped hole groove of the fifth rodless cavity of the fifth hydraulic cylinder close to the extended tail section, and the other E5 oil port in the fifth U-shaped hole groove is communicated with the fifth rodless cavity after the fifth piston rod is completely extended;
an A6 oil port formed in the bottom of the sixth cylinder body on one side of a sixth rodless cavity of the sixth hydraulic cylinder is connected with a C6 oil port formed in the fifth piston of the fifth hydraulic cylinder through a first core tube five and an oil tube in the fifth piston rod of the fifth hydraulic cylinder, and a B6 oil port formed in the sixth cylinder cover on one side of the sixth rodless cavity is connected with a D5 oil port formed in the fifth piston rod of the fifth hydraulic cylinder through a second core tube five in the fifth piston rod of the fifth hydraulic cylinder and the oil tube.
The technical scheme of the invention is further improved as follows: the first hydraulic cylinder comprises a first cylinder body, a first cylinder cover, a first piston and a first piston rod, wherein the first cylinder body is divided into a first rodless cavity and a first rod cavity; an A1 oil port is formed in the bottom of the first cylinder body on one side of the first rodless cavity, a B1 oil port is formed in the first cylinder cover on one side of the first rod-containing cavity, and the A1 oil port and the B1 oil port are respectively connected with two oil ports of the three-position four-way reversing valve through oil pipes; an A1 oil port is directly connected to the first rodless cavity, a B1 oil port is divided into two through an oil way in the first cylinder cover, one oil port is connected with a D1 oil port on the first piston rod after the first cylinder cover is completely extended out, and the other oil port is connected to the first rodless cavity through a first two-position two-way manual reversing valve; an E1 oil port and an F1 oil port are formed in a first U-shaped hole groove of the first cylinder body, close to the extending tail section of the first piston, and the E1 oil port and the F1 oil port are communicated through an oil way in the first U-shaped hole groove; the E1 oil port is communicated with the first rodless cavity when the first piston rod is fully extended, and the F1 oil port is communicated with the C1 oil port formed on the first piston when the first piston rod is fully extended; the C1 oil port is connected to the A2 oil port located at the bottom of the second cylinder body of the second hydraulic cylinder through the first core tube I and the oil tube in the first piston rod of the first hydraulic cylinder, and the D1 oil port formed in the first piston rod is connected to the B2 oil port located on the second cylinder cover of the second hydraulic cylinder through the second core tube I and the oil tube in the first piston rod of the first hydraulic cylinder.
The technical scheme of the invention is further improved as follows: the second hydraulic cylinder comprises a second cylinder body, a second cylinder cover, a second piston and a second piston rod, wherein the second cylinder body is divided into a second rodless cavity and a second rod cavity; an A2 oil port is formed in the bottom of the second cylinder body on one side of the second rodless cavity, and a B2 oil port is formed in the second cylinder cover on one side of the second rod-containing cavity; an A2 oil port is directly connected to the second rodless cavity, a B2 oil port is divided into two through an oil way in the second cylinder cover, one oil port is connected with a D2 oil port on the second piston rod after the second cylinder cover is completely extended out, and the other oil port is connected to the second rodless cavity through a second two-position oil port and a manual reversing valve; an E2 oil port and an F2 oil port are formed in a second U-shaped hole groove, close to the extending tail section of the second piston, of the second cylinder body, the E2 oil port and the F2 oil port are communicated through an oil way in the second U-shaped hole groove, the E2 oil port is communicated with a second rodless cavity when the second piston rod extends completely, and the F2 oil port is communicated with a C2 oil port formed in the second piston when the second piston rod extends completely; the C2 oil port is connected to the A3 oil port located at the bottom of the third cylinder body of the third hydraulic cylinder through the second first core tube and the oil tube in the second piston rod of the second hydraulic cylinder, and the D2 oil port formed in the second piston rod is connected to the B3 oil port located on the third cylinder cover of the third hydraulic cylinder through the second core tube and the oil tube in the second piston rod of the second hydraulic cylinder.
The technical scheme of the invention is further improved as follows: the third hydraulic cylinder comprises a third cylinder body, a third cylinder cover, a third piston and a third piston rod, wherein the third cylinder body is divided into a third rodless cavity and a third rod cavity; the bottom of the third cylinder body at one side of the third rodless cavity is provided with an A3 oil port, and the third cylinder cover at one side of the third rod-containing cavity is provided with a B3 oil port; an A3 oil port is directly connected to a third rodless cavity, a B3 oil port is divided into two through an oil way in a third cylinder cover, one oil port is connected with a D3 port on a third piston rod which is completely extended out through the third cylinder cover, and the other oil port is connected to the third rodless cavity through a third two-position two-way manual reversing valve; an E3 oil port and an F3 oil port are formed in a third U-shaped hole groove, close to the extending tail section of the third piston, of the third cylinder body, and the E3 oil port and the F3 oil port are communicated through an oil way in the third U-shaped hole groove; the E3 oil port is communicated with the third rodless cavity when the third piston rod is fully extended, and the F3 oil port is communicated with the C3 oil port arranged on the third piston when the third piston rod is fully extended; the C3 oil port is connected to the A4 oil port located at the bottom of the fourth cylinder body of the fourth hydraulic cylinder through the third core tube inside the third piston rod of the third hydraulic cylinder and the oil pipe, and the D3 oil port formed in the third piston rod is connected to the B4 oil port located on the fourth cylinder cover of the fourth hydraulic cylinder through the third core tube inside the third piston rod of the third hydraulic cylinder and the oil pipe.
The technical scheme of the invention is further improved as follows: the fourth hydraulic cylinder comprises a fourth cylinder body, a fourth cylinder cover, a fourth piston and a fourth piston rod, wherein the fourth cylinder body is divided into a fourth rodless cavity and a fourth rod cavity; an A4 oil port is formed in the bottom of the fourth cylinder body on one side of the fourth rodless cavity, and a B4 oil port is formed in the fourth cylinder cover on one side of the fourth rod-containing cavity; an A4 oil port is directly connected to a fourth rodless cavity, a B4 oil port is divided into two through an oil way in a fourth cylinder cover, one oil port is connected with a D4 port on a fourth piston rod which is completely extended out through the fourth cylinder cover, the other oil port is connected to the fourth rodless cavity through a fourth two-position manual reversing valve, an E4 oil port and an F4 oil port are formed in a fourth U-shaped hole groove of the fourth cylinder body, which is close to the extending tail section of the fourth piston, and the E4 oil port and the F4 oil port are communicated through the oil way in the fourth U-shaped hole groove; the E4 oil port is communicated with the fourth rodless cavity when the fourth piston rod is fully extended, and the F4 oil port is communicated with the C4 oil port formed in the fourth piston when the fourth piston rod is fully extended; the C4 oil port is connected to the A5 oil port located at the bottom of the fifth cylinder body of the fifth hydraulic cylinder through the first core tube four and the oil pipe inside the fourth piston rod of the fourth hydraulic cylinder, and the D4 oil port formed in the fourth piston rod is connected to the B5 oil port located on the fifth cylinder cover of the fifth hydraulic cylinder through the second core tube four and the oil pipe inside the fourth piston rod of the fourth hydraulic cylinder.
The technical scheme of the invention is further improved as follows: the fifth hydraulic cylinder comprises a fifth cylinder body, a fifth cylinder cover, a fifth piston and a fifth piston rod, wherein the fifth cylinder body is divided into a fifth rodless cavity and a fifth rod cavity; an A5 oil port is formed in the bottom of the fifth cylinder body on one side of the fifth rodless cavity, and a B5 oil port is formed in the fifth cylinder cover on one side of the fifth rod-containing cavity; an A5 oil port is directly connected to a fifth rodless cavity, a B5 oil port is divided into two through an oil way in a fifth cylinder cover, one oil port is connected with a D5 oil port on a completely extended fifth piston rod through the fifth cylinder cover, and the other oil port is connected with the fifth rodless cavity through a fifth two-position oil port and a manual reversing valve; an E5 oil port and an F5 oil port are formed in a fifth U-shaped hole groove of the fifth cylinder body, which is close to the extending tail section of the fifth piston, and the E5 oil port and the F5 oil port are communicated through an oil way in the fifth U-shaped hole groove; the E5 oil port is communicated with the fifth rodless cavity when the fifth piston rod is fully extended, and the F5 oil port is communicated with the C5 oil port formed in the fifth piston when the fifth piston rod is fully extended; the C5 oil port is connected to the A6 oil port located at the bottom of the sixth cylinder body of the sixth hydraulic cylinder through the first core tube five inside the fifth piston rod of the fifth hydraulic cylinder and the oil pipe, and the D5 oil port formed in the fifth piston rod is connected to the B6 oil port located on the sixth cylinder cover of the sixth hydraulic cylinder through the second core tube five inside the fifth piston rod of the fifth hydraulic cylinder and the oil pipe.
The technical scheme of the invention is further improved as follows: the sixth hydraulic cylinder comprises a sixth cylinder body, a sixth cylinder cover, a sixth piston and a sixth piston rod, wherein the sixth cylinder body is divided into a sixth rodless cavity and a sixth rod cavity; an A6 oil port is formed in the bottom of the sixth cylinder body on the side of the sixth rodless cavity, and a B6 oil port is formed in the sixth cylinder cover on the side of the sixth rod cavity.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the invention can realize the following by skillfully designing the cylinder body structure and the whole hydraulic system: when the suspension arm extends out, the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder and the sixth hydraulic cylinder extend out in sequence; when the suspension arm retracts, the sixth hydraulic cylinder, the fifth hydraulic cylinder, the fourth hydraulic cylinder, the third hydraulic cylinder, the second hydraulic cylinder and the first hydraulic cylinder sequentially retract; when the telescopic arm is extended, the later arm can be extended only after each arm is fully extended, and when the telescopic arm is retracted, the former arm can be retracted only after each arm is fully retracted.
2. The invention can realize the sequential extension and retraction of the suspension arm from small to large, the extension sequence and the retraction sequence are fixed and stable, the phenomenon of disordered extension can not occur, and the extension and retraction sequence can not be changed along with the change of the load.
3. The invention can realize the sequential extension and retraction of a plurality of oil cylinders without additionally increasing the pressure of a hydraulic system, and has smaller realization difficulty and lower cost under the condition of more oil cylinders.
4. The invention can control the expansion sequence of the hydraulic cylinder without a complex oil circuit control system, and has simple structure and strong reliability.
Drawings
FIG. 1 is a schematic diagram of the sequential telescoping of the present invention;
FIG. 2 is an enlarged view of a portion of the first and second cylinders of the present invention;
FIG. 3 is an explanatory drawing of the extending operation of the present invention;
fig. 4 is a drawing explaining the retracting operation of the present invention.
The hydraulic control system comprises a hydraulic cylinder 1, a first hydraulic cylinder, a second hydraulic cylinder 2, a third hydraulic cylinder 3, a third hydraulic cylinder 4, a fourth hydraulic cylinder 5, a fifth hydraulic cylinder 6, a sixth hydraulic cylinder 7, a three-position four-way reversing valve 8-1, a first two-position two-way manual reversing valve 8-2, a second two-position two-way manual reversing valve 8-3, a third two-position two-way manual reversing valve 8-4, a fourth two-position two-way manual reversing valve 8-5 and a fifth two-position two-way manual reversing valve.
Detailed Description
The present invention will be further described in detail with reference to FIGS. 1 to 4 and the following embodiments:
as shown in fig. 1 and 2, a multi-arm sequential telescopic hydraulic system comprises a first hydraulic cylinder 1, a second hydraulic cylinder 2, a third hydraulic cylinder 3, a fourth hydraulic cylinder 4 and a fifth hydraulic cylinder 5 which have the same structure and are respectively provided with 1 two-position two-way manual directional valve on a hydraulic cylinder cover, different sixth hydraulic cylinders 6, a three-position four-way directional valve 7 arranged on an oil tank and an oil pipe used for conveying oil; an A1 oil port formed in the bottom of the first cylinder body on one side of a first rodless cavity of the first hydraulic cylinder 1 is connected with one oil port of the three-position four-way reversing valve 7 through an oil pipe, and a B1 oil port formed in the first cylinder cover on one side of the first rodless cavity is connected with the other oil port of the three-position four-way reversing valve 7 through an oil pipe;
an A2 oil port formed in the bottom of a second cylinder body on one side of a second rodless cavity of the second hydraulic cylinder 2 is connected with a C1 oil port formed in a first piston of the first hydraulic cylinder through a first core tube and an oil tube inside a first piston rod of the first hydraulic cylinder 1, a B2 oil port formed in a second cylinder cover on one side of a second rodless cavity is connected with a D1 oil port formed in the first piston rod of the first hydraulic cylinder through a second core tube and an oil tube inside the first piston rod of the first hydraulic cylinder 1, and a B2 oil port formed in the second cylinder cover on one side of a second rodless cavity is also communicated with a second rodless cavity of the second hydraulic cylinder through a second two-position two-way manual reversing valve 8-2; a D2 oil port formed in the second piston rod is communicated with a B2 oil port on the second cylinder cover close to one side of the second rod cavity when the second piston rod is completely extended, a C2 oil port formed in the second piston is communicated with an F2 oil port in a second U-shaped hole groove of the second rodless cavity of the second hydraulic cylinder close to the extending tail section, and the other E2 oil port in the second U-shaped hole groove is communicated with the second rodless cavity after the second piston rod is completely extended;
an A3 oil port formed in the bottom of a third cylinder body on one side of a third rodless cavity of the third hydraulic cylinder 3 is connected with a C2 oil port formed in a second piston of the second hydraulic cylinder through a second core tube and an oil tube inside a second piston rod of the second hydraulic cylinder 2, a B3 oil port formed in a third cylinder cover on one side of the third rodless cavity is connected with a D2 oil port formed in the second piston rod of the second hydraulic cylinder through a second core tube and an oil tube inside the second piston rod of the second hydraulic cylinder 2, and a B3 oil port formed in the third cylinder cover on one side of the third rodless cavity is also communicated with a third rodless cavity of the third hydraulic cylinder through a third two-position manual reversing valve 8-3; a D3 oil port formed in the third piston rod is communicated with a B3 oil port on a third cylinder cover close to one side of a third rod-containing cavity when the third piston rod is completely stretched out, a C3 oil port formed in the third piston is communicated with an F3 oil port in a third U-shaped hole groove of a third rodless cavity of the third hydraulic cylinder close to the stretching tail section, and the other E3 oil port in the third U-shaped hole groove is communicated with the third rodless cavity after the third piston rod is completely stretched out;
an A4 oil port formed in the bottom of a fourth cylinder body on one side of a fourth rodless cavity of the fourth hydraulic cylinder 4 is connected with a C3 oil port formed in a third piston of the third hydraulic cylinder through a first core tube III and an oil tube in the third piston rod of the third hydraulic cylinder 3, a B4 oil port formed in a fourth cylinder cover on one side of the fourth rodless cavity is connected with a D3 oil port formed in the third piston rod of the third hydraulic cylinder through a second core tube III and an oil tube in the third piston rod of the third hydraulic cylinder 3, and a B4 oil port formed in the fourth cylinder cover on one side of the fourth rodless cavity is also communicated with a fourth rodless cavity of the fourth hydraulic cylinder through a fourth two-position two-way manual reversing valve 8-4; a D4 oil port formed in the fourth piston rod is communicated with a B4 oil port on a fourth cylinder cover close to one side of a fourth rod-containing cavity when the fourth piston rod is completely extended, a C4 oil port formed in the fourth piston is communicated with an F4 oil port in a fourth U-shaped hole groove of a fourth rodless cavity of the fourth hydraulic cylinder close to the extending tail section, and the other E4 oil port in the fourth U-shaped hole groove is communicated with the fourth rodless cavity after the fourth piston rod is completely extended;
an A5 oil port formed in the bottom of a fifth cylinder body on one side of a fifth rodless cavity of the fifth hydraulic cylinder 5 is connected with a C4 oil port formed in a fourth piston of the fourth hydraulic cylinder through a first core tube four and an oil tube inside a fourth piston rod of the fourth hydraulic cylinder 4, a B5 oil port formed in a fifth cylinder cover on one side of a fifth rod cavity is connected with a D4 oil port formed in the fourth piston rod of the fourth hydraulic cylinder through a second core tube four and an oil tube inside the fourth piston rod of the fourth hydraulic cylinder 4, and a B5 oil port formed in the fifth cylinder cover on one side of the fifth rod cavity is also communicated with the fifth rod cavity of the fifth hydraulic cylinder through a fifth two-position manual reversing valve 8-5; a D5 oil port formed in the fifth piston rod is communicated with a B5 oil port on the fifth cylinder cover close to one side of the fifth rod-containing cavity when the fifth piston rod is completely extended, a C5 oil port formed in the fifth piston is communicated with an F5 oil port in a fifth U-shaped hole groove of the fifth rodless cavity of the fifth hydraulic cylinder close to the extended tail section, and the other E5 oil port in the fifth U-shaped hole groove is communicated with the fifth rodless cavity after the fifth piston rod is completely extended;
an A6 oil port formed in the bottom of the sixth cylinder body on one side of a sixth rodless cavity of the sixth hydraulic cylinder 6 is connected with a C5 oil port formed in the fifth piston of the fifth hydraulic cylinder 5 through a first core tube five and an oil tube inside the fifth piston rod of the fifth hydraulic cylinder 5, and a B6 oil port formed in the sixth cylinder cover on one side of the sixth rodless cavity is connected with a D6 oil port formed in the fifth piston rod of the fifth hydraulic cylinder 5 through a second core tube five and an oil tube inside the fifth piston rod of the fifth hydraulic cylinder 5.
The first hydraulic cylinder 1 comprises a first cylinder body, a first cylinder cover, a first piston and a first piston rod, wherein the first cylinder body is divided into a first rodless cavity and a first rod cavity; an A1 oil port is formed in the bottom of the first cylinder body on one side of the first rodless cavity, a B1 oil port is formed in the first cylinder cover on one side of the first rod-containing cavity, and the A1 oil port and the B1 oil port are respectively connected with two oil ports of the three-position four-way reversing valve 7 through oil pipes; an A1 oil port is directly connected to the first rodless cavity, a B1 oil port is divided into two through an oil way in the first cylinder cover, one oil port is connected with a D1 oil port on the first piston rod after the first cylinder cover is completely extended out, and the other oil port is connected to the first rod cavity through a first two-position two-way manual reversing valve 8-1; an E1 oil port and an F1 oil port are formed in a first U-shaped hole groove of the first cylinder body, close to the extending tail section of the first piston, and the E1 oil port and the F1 oil port are communicated through an oil way in the first U-shaped hole groove; the E1 oil port is communicated with the first rodless cavity when the first piston rod is fully extended, and the F1 oil port is communicated with the C1 oil port formed on the first piston when the first piston rod is fully extended; the C1 oil port is connected to the a2 oil port located at the bottom of the second cylinder body of the second hydraulic cylinder 2 through the first core tube and the oil tube inside the first piston rod of the first hydraulic cylinder 1, and the D1 oil port opened on the first piston rod is connected to the B2 oil port located on the second cylinder cover of the second hydraulic cylinder 2 through the second core tube and the oil tube inside the first piston rod of the first hydraulic cylinder 1. The first U-shaped hole groove is designed as long as the requirement that after the first piston extends to the bottom, an E1 port is exposed in the first rodless cavity, an F1 port is communicated with a C1 port, and the second U-shaped hole groove, the third U-shaped hole groove, the fourth U-shaped hole groove and the fifth U-shaped hole groove in other second hydraulic cylinders 2, third hydraulic cylinders 3, fourth hydraulic cylinders 4 and fifth hydraulic cylinders 5 are designed to be the same; the two-position two-way reversing valve can be arranged outside the cylinder cover, and two oil ways are arranged to be connected with the inside of the cylinder cover.
The second hydraulic cylinder 2 comprises a second cylinder body which is divided into a second rodless cavity and a second rod cavity, a second cylinder cover, a second piston and a second piston rod; an A2 oil port is formed in the bottom of the second cylinder body on one side of the second rodless cavity, and a B2 oil port is formed in the second cylinder cover on one side of the second rod-containing cavity; an A2 oil port is directly connected to the second rodless cavity, a B2 oil port is divided into two through an oil way in the second cylinder cover, one oil port is connected with a D2 oil port on the second piston rod after the second piston rod is completely extended out through the second cylinder cover, and the other oil port is connected to the second rodless cavity through a second two-position oil port and a manual reversing valve 8-2; an E2 oil port and an F2 oil port are formed in a second U-shaped hole groove, close to the extending tail section of the second piston, of the second cylinder body, the E2 oil port and the F2 oil port are communicated through an oil way in the second U-shaped hole groove, the E2 oil port is communicated with a second rodless cavity when the second piston rod extends completely, and the F2 oil port is communicated with a C2 oil port formed in the second piston when the second piston rod extends completely; the C2 oil port is connected to the A3 oil port located at the bottom of the third cylinder body of the third hydraulic cylinder 3 through the second first core tube and the oil tube inside the second piston rod of the second hydraulic cylinder 2, and the D2 oil port opened on the second piston rod is connected to the B3 oil port located on the third cylinder body of the third hydraulic cylinder 3 through the second core tube and the oil tube inside the second piston rod of the second hydraulic cylinder 2.
The third hydraulic cylinder 3 comprises a third cylinder body, a third cylinder cover, a third piston and a third piston rod, wherein the third cylinder body is divided into a third rodless cavity and a third rod cavity; the bottom of the third cylinder body at one side of the third rodless cavity is provided with an A3 oil port, and the third cylinder cover at one side of the third rod-containing cavity is provided with a B3 oil port; an A3 oil port is directly connected to a third rodless cavity, a B3 oil port is divided into two through an oil way in a third cylinder cover, one oil port is connected with a D3 oil port on a third piston rod which is completely extended out through the third cylinder cover, and the other oil port is connected to the third rodless cavity through a third two-position oil port and a second manual reversing valve 8-3; an E3 oil port and an F3 oil port are formed in a third U-shaped hole groove, close to the extending tail section of the third piston, of the third cylinder body, and the E3 oil port and the F3 oil port are communicated through an oil way in the third U-shaped hole groove; the E3 oil port is communicated with the third rodless cavity when the third piston rod is fully extended, and the F3 oil port is communicated with the C3 oil port arranged on the third piston when the third piston rod is fully extended; the C3 oil port is connected to the a4 oil port located at the bottom of the fourth cylinder body of the fourth hydraulic cylinder 4 through the third first core tube inside the third piston rod of the third hydraulic cylinder 3 and the oil pipe, and the D3 oil port opened on the third piston rod is connected to the B4 oil port located on the fourth cylinder head of the fourth hydraulic cylinder 4 through the third second core tube inside the third piston rod of the third hydraulic cylinder 3 and the oil pipe.
The fourth hydraulic cylinder 4 comprises a fourth cylinder body, a fourth cylinder cover, a fourth piston and a fourth piston rod, wherein the fourth cylinder body is divided into a fourth rodless cavity and a fourth rod cavity; an A4 oil port is formed in the bottom of the fourth cylinder body on one side of the fourth rodless cavity, and a B4 oil port is formed in the fourth cylinder cover on one side of the fourth rod-containing cavity; an A4 oil port is directly connected to a fourth rodless cavity, a B4 oil port is divided into two through an oil way in a fourth cylinder cover, one oil port is connected with a D4 oil port on a fourth piston rod which is completely extended out through the fourth cylinder cover, the other oil port is connected to the fourth rod cavity through a fourth two-position manual reversing valve 8-4, an E4 oil port and an F4 oil port are formed in a fourth U-shaped hole groove of the fourth cylinder body, close to the extending tail section of the fourth piston, and an E4 oil port and an F4 oil port are communicated through the oil way in the fourth U-shaped hole groove; the E4 oil port is communicated with the fourth rodless cavity when the fourth piston rod is fully extended, and the F4 oil port is communicated with the C4 oil port formed in the fourth piston when the fourth piston rod is fully extended; the C4 oil port is connected to the a5 oil port located at the bottom of the fifth cylinder body of the fifth hydraulic cylinder 5 through the first core tube four and the oil pipe inside the fourth piston rod of the fourth hydraulic cylinder 4, and the D4 oil port opened on the fourth piston rod is connected to the B5 oil port located on the fifth cylinder head of the fifth hydraulic cylinder 5 through the second core tube four and the oil pipe inside the fourth piston rod of the fourth hydraulic cylinder 4.
The fifth hydraulic cylinder 5 comprises a fifth cylinder body, a fifth cylinder cover, a fifth piston and a fifth piston rod, wherein the fifth cylinder body is divided into a fifth rodless cavity and a fifth rod cavity; an A5 oil port is formed in the bottom of the fifth cylinder body on one side of the fifth rodless cavity, and a B5 oil port is formed in the fifth cylinder cover on one side of the fifth rod-containing cavity; an A5 oil port is directly connected to a fifth rodless cavity, a B5 oil port is divided into two through an oil way in a fifth cylinder cover, one oil port is connected with a D5 oil port on a completely extended fifth piston rod through the fifth cylinder cover, and the other oil port is connected with a rod cavity through a fifth two-position oil port and a manual reversing valve 8-5; an E5 oil port and an F5 oil port are formed in a fifth U-shaped hole groove of the fifth cylinder body, which is close to the extending tail section of the fifth piston, and the E5 oil port and the F5 oil port are communicated through an oil way in the fifth U-shaped hole groove; the E5 oil port is communicated with the fifth rodless cavity when the fifth piston rod is fully extended, and the F5 oil port is communicated with the C5 oil port formed in the fifth piston when the fifth piston rod is fully extended; the C5 oil port is connected to the a6 oil port located at the bottom of the sixth cylinder body of the sixth hydraulic cylinder 6 through the first core tube five inside the fifth piston rod of the fifth hydraulic cylinder 5 and the oil pipe, and the D5 oil port opened on the fifth piston rod is connected to the B6 oil port located on the sixth cylinder cover of the sixth hydraulic cylinder 6 through the second core tube five inside the fifth piston rod of the fifth hydraulic cylinder 5 and the oil pipe.
The sixth hydraulic cylinder 6 comprises a sixth cylinder body, a sixth cylinder cover, a sixth piston and a sixth piston rod, wherein the sixth cylinder body is divided into a sixth rodless cavity and a sixth rod cavity; an A6 oil port is formed in the bottom of the sixth cylinder body on one side of the sixth rodless cavity, and a B6 oil port is formed in the sixth cylinder cover on one side of the sixth rodless cavity; the sixth piston rod is not provided with a core pipe; the U-shaped hole groove is not arranged, and the sixth cylinder cover is not provided with the two-position two-way manual reversing valve; and oil ports are not arranged on the sixth piston and the sixth piston rod.
The specific use method comprises the following steps:
when the flexible hydraulic system in multinode arm order stretches out the action, as shown in fig. 3, the right position work of three-position four-way reversing valve 7, fluid passes through the first no pole chamber of A1 hydraulic fluid port entering first pneumatic cylinder 1, first pneumatic cylinder 1 stretches out the action, F1 hydraulic fluid port can't communicate with C1 hydraulic fluid port when first pneumatic cylinder 1 does not stretch out completely, so fluid can't enter into the second no pole chamber of second pneumatic cylinder, the second pneumatic cylinder can't stretch out, and on the same way, the second behind the second pneumatic cylinder 2 third, the fourth, the fifth, the sixth pneumatic cylinder also can't stretch out the action. When the first hydraulic cylinder 1 does not extend completely, the two-position two-way manual reversing valve 8-1 installed on the first hydraulic cylinder 1 is always in an open state, so that oil in the first rod cavity of the first hydraulic cylinder 1 flows back to the oil tank through an oil way in the first cylinder cover of the first rod cavity, the oil port of the first two-position two-way manual reversing valve 8-1, the oil port of the first two-position two-way manual reversing valve B1 and the three-position four-way reversing valve 7. After the first hydraulic cylinder 1 is stretched out, the first two-position two-way manual reversing valve 8-1 installed on the first hydraulic cylinder 1 is closed, the E1 oil port is communicated with the first rodless cavity of the first hydraulic cylinder 1, the F1 oil port is communicated with the C1 oil port on the first piston, oil flows to the A2 oil port of the second hydraulic cylinder 2 through the E1 oil port, the oil passage in the first U-shaped hole groove, the F1 oil port, the C1 oil port and the first core tube I and the oil tube in the first piston rod and enters the second rodless cavity of the second hydraulic cylinder 2, the second hydraulic cylinder 2 is stretched out, when the second hydraulic cylinder 2 is not fully extended, the F2 oil port and the C2 oil port cannot be communicated, the oil cannot enter the third rodless cavity of the third hydraulic cylinder 3, the third hydraulic cylinder 3 cannot be extended, and similarly, the fourth, fifth and sixth hydraulic cylinders behind the third hydraulic cylinder 3 cannot be extended. When the second hydraulic cylinder 2 does not extend completely, the second two-position two-way manual reversing valve 8-2 installed on the second hydraulic cylinder 2 is always in an open state, oil in the second rod cavity flows through the second two-position two-way reversing valve 8-2 and the oil port B2 to the oil port D1, the first hydraulic cylinder 1 is in a completely extending state at the moment, the oil port D1 is communicated with the oil port B1 through an oil way in the first cylinder cover, the first two-position two-way reversing valve 8-1 of the first hydraulic cylinder 1 is closed at the moment, the oil cannot enter the first rod cavity of the first hydraulic cylinder 1, and only can flow back to the oil tank through the oil port B1 and the three-position four-way reversing valve 7. Similarly, the extension principle of the rest hydraulic cylinders is the same as that of the first hydraulic cylinder 1 and the second hydraulic cylinder 2, and the sequential extension actions of the first hydraulic cylinder, the second hydraulic cylinder, the third hydraulic cylinder, the fourth hydraulic cylinder, the fifth hydraulic cylinder and the sixth hydraulic cylinder are realized.
When the multi-arm sequential telescopic hydraulic system performs the retracting action, as shown in fig. 4, the retracting action is based on the extending sequence, that is, when one hydraulic cylinder retracts, all the hydraulic cylinders in front of the hydraulic cylinder are in a fully extending state. The three-position four-way reversing valve 7 works at the left position, oil liquid passes through the oil port B1, but the first two-position two-way reversing valve 8-1 arranged on the first hydraulic cylinder 1 is in a closed state at the moment, so the oil liquid can not enter the first rodless cavity of the first hydraulic cylinder 1, the first hydraulic cylinder 1 can not retract, the oil liquid can only flow to the oil port B2 through the oil port D1 and the second core tube in the first piston rod, similarly, the second two-position two-way manual reversing valve 8-2 of the second hydraulic cylinder 2 is also in a closed state, the second hydraulic cylinder 2 can not retract, similarly, the third hydraulic cylinder 3, the fourth hydraulic cylinder 4 and the fifth hydraulic cylinder 5 can not retract, the oil liquid can only flow to the rod cavity of the sixth hydraulic cylinder 6, the sixth hydraulic cylinder 6 retracts first, the oil liquid of the sixth hydraulic cylinder 6 flows through the oil port A6, the oil pipe and the first core tube in the fifth piston rod of the fifth hydraulic cylinder 5 to the oil port C5, at this time, the fifth hydraulic cylinder 5 is fully extended, so the C5 oil port is communicated with the F5 oil port, and the oil flows to the fifth rodless cavity of the fifth hydraulic cylinder 5 through the F5 oil port, the oil path in the fifth U-shaped hole groove and the E5 oil port, and flows back to the oil tank through the three-position four-way reversing valve 7 at the same stage as the a5 oil port. When the retraction action of the sixth hydraulic cylinder 6 is completed, the sixth hydraulic cylinder 6 impacts a fifth two-position two-way reversing valve 8-5 of the fifth hydraulic cylinder 5, the fifth two-position two-way reversing valve 8-5 on the fifth hydraulic cylinder 5 is opened, oil flows into a fifth rod cavity of the fifth hydraulic cylinder 5, the fifth hydraulic cylinder 5 starts the retraction action, and meanwhile, the oil in a fifth rodless cavity of the fifth hydraulic cylinder 5 flows through an oil port A5, an oil port C4, an oil port F4, an oil port E4 and an oil port A4; thus, the oil flows back to the oil tank through the three-position four-way reversing valve 7 at one stage. The retraction principle of other hydraulic cylinders is the same as the principle, and the sequential retraction action of six, five, four, three, two and one is realized.
The invention is not limited to six hydraulic cylinders, and can be flexibly arranged according to actual conditions and actual requirements, and more or less hydraulic cylinders can be arranged.
In conclusion, the structure of each hydraulic cylinder is skillfully designed by designing six hydraulic cylinders, so that the rear section of arm can extend only after each section of arm extends completely when the telescopic hydraulic system extends, and the front section of arm can retract only after each section of arm retracts completely when the telescopic hydraulic system retracts, so that the suspension arms can extend from small to large and retract from large to small sequentially; the extending sequence and the retracting sequence are fixed and stable, the phenomenon of extending disorder can not occur, and the extending and retracting sequence can not be changed along with the change of the load.
Claims (7)
1. A multi-section-arm sequential telescopic hydraulic system is characterized in that: the hydraulic cylinder comprises a first hydraulic cylinder (1), a second hydraulic cylinder (2), a third hydraulic cylinder (3), a fourth hydraulic cylinder (4) and a fifth hydraulic cylinder (5) which have the same structure and are respectively provided with 1 two-position two-way manual reversing valve on a hydraulic cylinder cover, wherein different sixth hydraulic cylinders (6) are arranged, and the hydraulic cylinder also comprises a three-position four-way reversing valve (7) arranged on an oil tank and an oil pipe used for conveying oil;
an A1 oil port formed in the bottom of the first cylinder body on one side of a first rodless cavity of the first hydraulic cylinder (1) is connected with an oil port of the three-position four-way reversing valve (7) through an oil pipe, and a B1 oil port formed in the first cylinder cover on one side of the first rodless cavity is connected with the other oil port of the three-position four-way reversing valve (7) through an oil pipe (9);
an A2 oil port formed in the bottom of a second cylinder body on one side of a second rodless cavity of the second hydraulic cylinder (2) is connected with a C1 oil port formed in a first piston of the first hydraulic cylinder (1) through a first core tube and an oil tube inside a first piston rod of the first hydraulic cylinder (1), a B2 oil port formed in a second cylinder cover on one side of a second rodless cavity is connected with a D1 oil port formed in the first piston rod of the first hydraulic cylinder (1) through a second core tube and the oil tube inside the first piston rod of the first hydraulic cylinder (1), and a B2 oil port formed in the second cylinder cover on one side of the second rodless cavity is also communicated with a second rodless cavity of the hydraulic cylinder through a second two-position manual reversing valve (8-2); a D2 oil port formed in the second piston rod is communicated with a B2 oil port on the second cylinder cover close to one side of the second rod cavity when the second piston rod is completely extended, a C2 oil port formed in the second piston is communicated with an F2 oil port in a second U-shaped hole groove of the second rodless cavity of the hydraulic cylinder close to the extending tail section, and the other E2 oil port in the second U-shaped hole groove is communicated with the second rodless cavity after the second piston rod is completely extended;
an A3 oil port formed in the bottom of a third cylinder body on one side of a third rodless cavity of the third hydraulic cylinder (3) is connected with a C2 oil port formed in a second piston of the second hydraulic cylinder (2) through a second core tube and an oil tube inside a second piston rod of the second hydraulic cylinder (2), a B3 oil port formed in a third cylinder cover on one side of the third rodless cavity is connected with a D2 oil port formed in the second piston rod of the second hydraulic cylinder (2) through a second core tube and an oil tube inside the second piston rod of the second hydraulic cylinder (2), and a B3 oil port formed in the third cylinder cover on one side of the third rodless cavity is also communicated with a third rodless cavity of the hydraulic cylinder through a third two-position manual reversing valve (8-3); a D3 oil port formed in the third piston rod is communicated with a B3 oil port on a third cylinder cover close to one side of a third rod-containing cavity when the third piston rod is completely extended, a C3 oil port formed in the third piston is communicated with an F3 oil port in a third U-shaped hole groove of the third rodless cavity of the hydraulic cylinder close to the extended tail section, and the other E3 oil port in the third U-shaped hole groove is communicated with the third rodless cavity after the third piston rod is completely extended;
an A4 oil port formed in the bottom of a fourth cylinder body on one side of a fourth rodless cavity of the fourth hydraulic cylinder (4) is connected with a C3 oil port formed in a third piston of the third hydraulic cylinder (3) through a first core tube III and an oil tube in the third piston rod of the third hydraulic cylinder (3), a B4 oil port formed in a fourth cylinder cover on one side of a fourth rod cavity is connected with a D3 oil port formed in the third piston rod of the third hydraulic cylinder (3) through a second core tube III and an oil tube in the third piston rod of the third hydraulic cylinder (3), and a B4 oil port formed in the fourth cylinder cover on one side of the fourth rod cavity is also communicated with a fourth rod cavity of the hydraulic cylinder through a fourth two-position manual reversing valve (8-4); a D4 oil port formed in the fourth piston rod is communicated with a B4 oil port on a fourth cylinder cover close to one side of a fourth rod-containing cavity when the fourth piston rod is completely extended, a C4 oil port formed in the fourth piston is communicated with an F4 oil port in a fourth U-shaped hole groove of the fourth rodless cavity of the hydraulic cylinder close to the extending tail section, and the other E4 oil port in the fourth U-shaped hole groove is communicated with the fourth rodless cavity after the fourth piston rod is completely extended;
an A5 oil port formed in the bottom of a fifth cylinder body on one side of a fifth rodless cavity of the fifth hydraulic cylinder (5) is connected with a C4 oil port formed in a fourth piston of the fourth hydraulic cylinder (4) through a first core tube four and an oil tube inside a fourth piston rod of the fourth hydraulic cylinder (4), a B5 oil port formed in the fifth cylinder cover on one side of the fifth rod cavity is connected with a D4 oil port formed in the fourth piston rod of the fourth hydraulic cylinder (4) through a second core tube four and an oil tube inside the fourth piston rod of the fourth hydraulic cylinder (4), and a B5 oil port formed in the fifth cylinder cover on one side of the fifth rod cavity is also communicated with a fifth rod cavity of the hydraulic cylinder through a fifth two-position manual reversing valve (8-5); a D5 oil port formed in the fifth piston rod is communicated with a B5 oil port on the fifth cylinder cover close to one side of the fifth rod cavity when the fifth piston rod is completely extended, a C5 oil port formed in the fifth piston is communicated with an F5 oil port in a fifth U-shaped hole groove of the fifth rodless cavity of the hydraulic cylinder close to the extending tail section, and the other E5 oil port in the fifth U-shaped hole groove is communicated with the fifth rodless cavity after the fifth piston rod is completely extended;
an A6 oil port formed in the bottom of a sixth cylinder body on one side of a sixth rodless cavity of the sixth hydraulic cylinder (6) is connected with a C5 oil port formed in a fifth piston of the fifth hydraulic cylinder (5) through a first core tube five and an oil tube inside the fifth piston rod of the fifth hydraulic cylinder (5), and a B6 oil port formed in a sixth cylinder cover on one side of the sixth rodless cavity is connected with a C5 oil port formed in the fifth piston rod of the fifth hydraulic cylinder (5) through a second core tube five and an oil tube inside the fifth piston rod of the fifth hydraulic cylinder (5).
2. A multi-boom sequential telescopic hydraulic system according to claim 1, wherein: the first hydraulic cylinder (1) comprises a first cylinder body, a first cylinder cover, a first piston and a first piston rod, wherein the first cylinder body is divided into a first rodless cavity and a first rod cavity; an A1 oil port is formed in the bottom of the first cylinder body on one side of the first rodless cavity, a B1 oil port is formed in the first cylinder cover on one side of the first rod-containing cavity, and the A1 oil port and the B1 oil port are respectively connected with two oil ports of a three-position four-way reversing valve (7) through oil pipes; an A1 oil port is directly connected to the first rodless cavity, a B1 oil port is divided into two through an oil way in the first cylinder cover, one oil port is connected with a D1 oil port on the first piston rod after the first cylinder cover is completely extended out, and the other oil port is connected to the first rod cavity through a first two-position two-way manual reversing valve (8-1); an E1 oil port and an F1 oil port are formed in a first U-shaped hole groove of the first cylinder body, close to the extending tail section of the first piston, and the E1 oil port and the F1 oil port are communicated through an oil way in the first U-shaped hole groove; the E1 oil port is communicated with the first rodless cavity when the first piston rod is fully extended, and the F1 oil port is communicated with the C1 oil port formed on the first piston when the first piston rod is fully extended; the C1 oil port is connected to the A2 oil port located at the bottom of the second cylinder body of the second hydraulic cylinder (2) through the first core tube and the oil tube inside the first piston rod of the first hydraulic cylinder (1), and the D1 oil port formed in the first piston rod is connected to the B2 oil port located on the second cylinder cover of the second hydraulic cylinder (2) through the second core tube and the oil tube inside the first piston rod of the first hydraulic cylinder (1).
3. A multi-boom sequential telescopic hydraulic system according to claim 1, wherein: the second hydraulic cylinder (2) comprises a second cylinder body, a second cylinder cover, a second piston and a second piston rod, wherein the second cylinder body is divided into a second rodless cavity and a second rod cavity; an A2 oil port is formed in the bottom of the second cylinder body on one side of the second rodless cavity, and a B2 oil port is formed in the second cylinder cover on one side of the second rod-containing cavity; an A2 oil port is directly connected to the second rodless cavity, a B2 oil port is divided into two through an oil way in the second cylinder cover, one oil port is connected with a D2 oil port on the second piston rod after the second cylinder cover is completely extended out, and the other oil port is connected to the second rodless cavity through a second two-position two-way manual reversing valve (8-2); an E2 oil port and an F2 oil port are formed in a second U-shaped hole groove, close to the extending tail section of the second piston, of the second cylinder body, the E2 oil port and the F2 oil port are communicated through an oil way in the second U-shaped hole groove, the E2 oil port is communicated with a second rodless cavity when the second piston rod extends completely, and the F2 oil port is communicated with a C2 oil port formed in the second piston when the second piston rod extends completely; the oil port C2 is connected to the oil port A3 through the second core tube and the oil pipe inside the second piston rod of the second hydraulic cylinder (2), and the oil port D2 is connected to the oil port B3 through the second core tube and the oil pipe inside the second piston rod of the second hydraulic cylinder (2).
4. A multi-boom sequential telescopic hydraulic system according to claim 1, wherein: the third hydraulic cylinder (3) comprises a third cylinder body, a third cylinder cover, a third piston and a third piston rod, wherein the third cylinder body is divided into a third rodless cavity and a third rod cavity; the bottom of the third cylinder body at one side of the third rodless cavity is provided with an A3 oil port, and the third cylinder cover at one side of the third rod-containing cavity is provided with a B3 oil port; an A3 oil port is directly connected to a third rodless cavity, a B3 oil port is divided into two through an oil way in a third cylinder cover, one oil port is connected with a D3 oil port on a third piston rod which is completely extended out through the third cylinder cover, and the other oil port is connected to the third rodless cavity through a third two-position manual reversing valve (8-3); an E3 oil port and an F3 oil port are formed in a third U-shaped hole groove, close to the extending tail section of the third piston, of the third cylinder body, and the E3 oil port and the F3 oil port are communicated through an oil way in the third U-shaped hole groove; the E3 oil port is communicated with the third rodless cavity when the third piston rod is fully extended, and the F3 oil port is communicated with the C3 oil port arranged on the third piston when the third piston rod is fully extended; the C3 oil port is connected to the A4 oil port located at the bottom of the fourth cylinder body of the fourth hydraulic cylinder (4) through the third core tube inside the third piston rod of the third hydraulic cylinder (3) and the oil pipe, and the D3 oil port formed in the third piston rod is connected to the B4 oil port located on the fourth cylinder cover of the fourth hydraulic cylinder (4) through the third core tube inside the third piston rod of the third hydraulic cylinder (3) and the oil pipe.
5. A multi-boom sequential telescopic hydraulic system according to claim 1, wherein: the fourth hydraulic cylinder (4) comprises a fourth cylinder body, a fourth cylinder cover, a fourth piston and a fourth piston rod, wherein the fourth cylinder body is divided into a fourth rodless cavity and a fourth rod cavity; an A4 oil port is formed in the bottom of the fourth cylinder body on one side of the fourth rodless cavity, and a B4 oil port is formed in the fourth cylinder cover on one side of the fourth rod-containing cavity; an A4 oil port is directly connected to a fourth rodless cavity, a B4 oil port is divided into two through an oil way in a fourth cylinder cover, one oil port is connected with a D4 port on a fourth piston rod which is completely extended out through the fourth cylinder cover, the other oil port is connected to the fourth rod cavity through a fourth two-position manual reversing valve (8-4), an E4 oil port and an F4 oil port are formed in a fourth U-shaped hole groove of the fourth cylinder body, close to the extending tail section of the fourth piston, and the E4 oil port and the F4 oil port are communicated through the oil way in the fourth U-shaped hole groove; the E4 oil port is communicated with the fourth rodless cavity when the fourth piston rod is fully extended, and the F4 oil port is communicated with the C4 oil port formed in the fourth piston when the fourth piston rod is fully extended; the C4 oil port is connected to the A5 oil port located at the bottom of the fifth cylinder body of the fifth hydraulic cylinder (5) through the first core tube four and the oil pipe inside the fourth piston rod of the fourth hydraulic cylinder (4), and the D4 oil port formed in the fourth piston rod is connected to the B5 oil port located on the fifth cylinder cover of the fifth hydraulic cylinder (5) through the second core tube four and the oil pipe inside the fourth piston rod of the fourth hydraulic cylinder (4).
6. A multi-boom sequential telescopic hydraulic system according to claim 1, wherein: the fifth hydraulic cylinder (5) comprises a fifth cylinder body, a fifth cylinder cover, a fifth piston and a fifth piston rod, wherein the fifth cylinder body is divided into a fifth rodless cavity and a fifth rod cavity; an A5 oil port is formed in the bottom of the fifth cylinder body on one side of the fifth rodless cavity, and a B5 oil port is formed in the fifth cylinder cover on one side of the fifth rod-containing cavity; an A5 oil port is directly connected to a fifth rodless cavity, a B5 oil port is divided into two through an oil way in a fifth cylinder cover, one oil port is connected with a D5 oil port on a completely extended fifth piston rod through the fifth cylinder cover, and the other oil port is connected with the fifth rodless cavity through a fifth two-position manual reversing valve (8-5); an E5 oil port and an F5 oil port are formed in a fifth U-shaped hole groove of the fifth cylinder body, which is close to the extending tail section of the fifth piston, and the E5 oil port and the F5 oil port are communicated through an oil way in the fifth U-shaped hole groove; the E5 oil port is communicated with the fifth rodless cavity when the fifth piston rod is fully extended, and the F5 oil port is communicated with the C5 oil port formed in the fifth piston when the fifth piston rod is fully extended; the oil port C5 is connected to the oil port A6 through a first core tube five and an oil tube inside a fifth piston rod of the fifth hydraulic cylinder (5) and is located at the bottom of a sixth cylinder body of the sixth hydraulic cylinder (6), and the oil port D5 formed in the fifth piston rod is connected to the oil port B6 through a second core tube five and an oil tube inside the fifth piston rod of the fifth hydraulic cylinder (5) and is located on a sixth cylinder cover of the sixth hydraulic cylinder (6).
7. A multi-boom sequential telescopic hydraulic system according to claim 1, wherein: the sixth hydraulic cylinder (6) comprises a sixth cylinder body, a sixth cylinder cover, a sixth piston and a sixth piston rod, wherein the sixth cylinder body is divided into a sixth rodless cavity and a sixth rod cavity; an A6 oil port is formed in the bottom of the sixth cylinder body on the side of the sixth rodless cavity, and a B6 oil port is formed in the sixth cylinder cover on the side of the sixth rod cavity.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4403905A (en) * | 1980-08-22 | 1983-09-13 | J. I. Case Company | Operating mechanism for a swing mechanism valve |
| CN102705288A (en) * | 2012-06-19 | 2012-10-03 | 常德中联重科液压有限公司 | Anti-shaking balance valve, telescopic control loop of hydraulic cylinder and hydraulic device |
| CN103010976A (en) * | 2012-12-17 | 2013-04-03 | 中联重科股份有限公司 | Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery |
| CN205592215U (en) * | 2016-03-14 | 2016-09-21 | 三一帕尔菲格特种车辆装备有限公司 | Many hydro -cylinders telescope in sequence mechanism and engineering machine tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015048261A1 (en) * | 2013-09-27 | 2015-04-02 | Oceaneering International, Inc. | Rapid release emergency disconnect system incorporating bouancy apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4403905A (en) * | 1980-08-22 | 1983-09-13 | J. I. Case Company | Operating mechanism for a swing mechanism valve |
| CN102705288A (en) * | 2012-06-19 | 2012-10-03 | 常德中联重科液压有限公司 | Anti-shaking balance valve, telescopic control loop of hydraulic cylinder and hydraulic device |
| CN103010976A (en) * | 2012-12-17 | 2013-04-03 | 中联重科股份有限公司 | Hydraulic system for controlling oil cylinder to stretch out and draw back in sequence, horizontal supporting leg system and engineering machinery |
| CN205592215U (en) * | 2016-03-14 | 2016-09-21 | 三一帕尔菲格特种车辆装备有限公司 | Many hydro -cylinders telescope in sequence mechanism and engineering machine tool |
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| CN111140559A (en) | 2020-05-12 |
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