CN114294297A - Sequential telescopic oil cylinder system, control method and equipment thereof - Google Patents
Sequential telescopic oil cylinder system, control method and equipment thereof Download PDFInfo
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Abstract
The invention provides a sequential telescopic oil cylinder system, which is characterized in that a rodless cavity of a multi-stage telescopic oil cylinder is communicated through a connecting pipeline, a rod cavity of the multi-stage telescopic oil cylinder is communicated in a one-way mode through a one-way communicated oil way, a control oil way is arranged between a sealing cavity of a sealing device and a cavity of a piston rod, a piston rod at the upper stage is sealed before being completely extended out, and is communicated after being extended out, so that the control on an oil return oil way of a telescopic oil cylinder at the lower stage is realized; the invention realizes the sequential telescopic control of all levels of telescopic oil cylinders by skillfully designing the oil circuit of the telescopic oil cylinder and reasonably applying the hydraulic element and controlling the oil inlet circuit and the oil return circuit of the sequential telescopic oil cylinder system, and the sequential telescopic oil cylinder system has no mechanical collision of control elements and position limitation of a mechanical structure, so the system is more stable and reliable and has wider application range.
Description
Technical Field
The invention relates to the technical field of oil cylinders, in particular to a sequential telescopic oil cylinder system, a control method and equipment thereof.
Background
The hydraulic oil cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and makes linear reciprocating motion, has simple structure and reliable work, can remove a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to hydraulic systems of various machines. The hydraulic cylinder is basically composed of a cylinder barrel, a cylinder cover, a piston rod, a piston and a sealing device on the piston, wherein an oil inlet end is usually arranged at the bottom of the cylinder barrel, an oil return end is usually arranged at the upper part of the cylinder barrel, which is close to the cylinder cover, a rodless cavity is formed between the piston and the bottom of the cylinder barrel, and a rod cavity is formed between the piston and the cylinder cover.
With the development of hydraulic technology and mechanical equipment, the application of the multi-stage oil cylinder is more and more, and the required application scenes are more and more extensive; for example, in the jib type automobile crane, the multi-stage telescopic oil cylinders are matched with the structures of all levels of jibs for use, the mechanical properties of all levels of jibs are different, and the operation of preferentially using the jibs with good mechanical properties can effectively improve the operation efficiency and ensure the operation safety; therefore, achieving sequential control of the telescopic cylinders is an important issue in the art.
In the existing oil cylinder sequential telescoping technology, for example, the invention patent CN109973463A discloses an oil cylinder, a multi-oil cylinder sequential telescoping mechanism and an engineering machine which can reliably and sequentially telescope, the oil circuit is controlled to be on or off by adopting a stroke control valve and a stroke valve, so that after a first piston rod is completely extended, the oil circuit of a rodless cavity of a next-stage oil cylinder is opened; the piston rod of the next oil cylinder is communicated with the rod cavity of the previous oil cylinder after being completely retracted, so that reliable sequential extension and retraction are realized; although the technology realizes sequential extension and retraction of the multi-stage oil cylinder, the technology still has the following defects in practical application: (1) the reliability and the stability are poor; the primary oil cylinder at least comprises a stroke control valve, a stroke valve and a plurality of pipelines, and has a plurality of fault points; on one hand, the stroke control valve and the stroke valve are controlled by mechanical contact and even extrusion, so that loss and deviation are easy to occur in the use process, on the other hand, the energy of a hydraulic system is increased while the number of stages of the oil cylinder is increased, and the acting force generated by the expansion and contraction of the oil cylinder further influences the reliability and the stability of a mechanical control structure; (2) the applicable range is limited: the stroke control valve is arranged on the piston rod of the upper-stage oil cylinder and the lower-stage oil cylinder, and needs mechanical connection among the multi-stage oil cylinders, so that the application condition of the sequential telescopic oil cylinder is greatly limited, the space utilization, the structural design and the like of engineering machinery are greatly limited, and the popularization and the application of the sequential telescopic oil cylinder technology are influenced.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a sequential telescopic cylinder and a construction machine thereof, which have stable structure, high reliability, wide application range, and self-buffering performance.
The second purpose of the invention is to provide a control method of the sequential telescopic oil cylinder system.
A third object of the present invention is to provide an apparatus for sequentially telescoping a cylinder system.
The technical scheme of the invention is as follows:
a sequential telescopic oil cylinder system comprises n stages of telescopic oil cylinders, wherein n is an integer greater than or equal to 2, and the front n-1 stage adopts a sequential telescopic oil cylinder; the sequential telescopic oil cylinder comprises an oil inlet end, a rodless cavity, a piston rod, a piston, a telescopic end, a rod cavity, an oil return end and a sealing device, and the sequential telescopic oil cylinder has the following specific structure:
the center of the piston rod is provided with a cavity, the telescopic end is provided with a first connecting oil port and a second connecting oil port, the first connecting oil port is communicated with the cavity, and the second connecting oil port is communicated with the rodless cavity through a connecting pipeline; a first branch for communicating the cavity and the rod cavity is formed in the piston, and a one-way valve for enabling the rod cavity to be communicated to the cavity in one way is arranged in the first branch; the oil return end is provided with a control oil port on one side of the oil return port close to the piston, a sealing cavity is arranged in the middle of the sealing device, the control oil port corresponds to the position of the sealing cavity in a completely extended state of the piston rod, and a second branch for conducting the sealing cavity and the cavity is further arranged in the middle of the piston;
in the sequential telescopic oil cylinder system, an oil inlet end and an oil return end of a first-stage sequential telescopic oil cylinder are connected with a hydraulic system, a rodless cavity of an nth-stage telescopic oil cylinder is communicated with a rodless cavity of an nth-1-stage telescopic oil cylinder through an oil inlet end of the nth-stage telescopic oil cylinder and a second connecting oil port of an nth-1-stage telescopic oil cylinder, and a rod cavity of the nth-stage telescopic oil cylinder is communicated with a cavity of the nth-1-stage telescopic oil cylinder through an oil return end of the nth-stage telescopic oil cylinder and a first connecting oil port of the nth-1-stage telescopic oil cylinder.
Preferably, the connecting pipeline of the second connecting oil port communicated with the rodless cavity is arranged in the middle of the piston.
Preferably, there is a sealing layer between the connecting line and the piston.
Preferably, the control oil port is of a porous structure.
Preferably, the nth stage telescopic oil cylinder is a sequential telescopic oil cylinder.
Preferably, the oil inlet end and the oil return end of the first-stage telescopic oil cylinder are connected with a hydraulic system, the oil inlet end of the nth-stage telescopic oil cylinder is communicated with the rodless cavity of the nth-1-stage telescopic oil cylinder through the second connecting oil port of the nth-1-stage telescopic oil cylinder, the oil return end of the nth-stage telescopic oil cylinder is communicated with the cavity of the nth-1-stage telescopic oil cylinder through the first connecting oil port of the nth-1-stage telescopic oil cylinder, and the first connecting oil port and the second connecting oil port of the nth-stage telescopic oil cylinder are blocked in a closed mode.
A control method of a sequential telescopic oil cylinder system comprises an extension mode and a contraction mode:
the specific steps of the extension mode are as follows:
s1.1, a hydraulic system conveys hydraulic oil to an oil inlet end of a first-stage telescopic oil cylinder, the hydraulic oil enters a rodless cavity of the first-stage telescopic oil cylinder, and simultaneously the hydraulic oil is conveyed to an oil inlet end of a next-stage telescopic oil cylinder through a connecting pipeline in the middle of a piston of the first-stage telescopic oil cylinder and a second connecting oil port of the first-stage telescopic oil cylinder to enter a rodless cavity of the next-stage telescopic oil cylinder until the hydraulic oil is conveyed to the rodless cavity of each stage of telescopic oil cylinder;
s1.2, oil pressure of a rodless cavity rises, a piston rod is pushed by hydraulic pressure, and oil is discharged from a rod cavity to an oil return end;
s1.3, discharging oil in a rod cavity of the first-stage telescopic oil cylinder to a hydraulic system through an oil return end of the first-stage telescopic oil cylinder, and extending a piston rod of the first-stage telescopic oil cylinder; the oil liquid in the rod cavity of the next stage of telescopic oil cylinder flows to a first branch and a second branch of the cavity through a first connecting oil port of the previous stage of telescopic oil cylinder and the cavity through an oil return end, the first branch check valve prevents the oil liquid from being discharged, the tail end of the second branch is a sealed cavity, the oil liquid in the sealed cavity cannot be discharged, and a piston rod of the next stage of telescopic oil cylinder cannot extend out;
s1.4, a piston rod of a first-stage telescopic oil cylinder is completely extended, a sealing cavity of the first-stage telescopic oil cylinder is communicated with a control oil port, oil in a rod cavity of a next-stage telescopic oil cylinder is discharged through a second branch of a cavity of a previous-stage telescopic oil cylinder, and a piston rod of the next-stage telescopic oil cylinder begins to extend;
s1.5, similarly, sequentially extending the piston rods of the sequential telescopic oil cylinders step by step;
the specific steps of the shrinkage mode are as follows:
s2.1, a hydraulic system conveys hydraulic oil to an oil return end of a first-stage telescopic oil cylinder, the hydraulic oil enters a rod cavity of the first-stage telescopic oil cylinder and is conveyed to a cavity of the first-stage telescopic oil cylinder through a first branch of the first-stage telescopic oil cylinder, and the hydraulic oil is conveyed to a rod cavity of a next-stage telescopic oil cylinder through a first connecting oil port of the first-stage telescopic oil cylinder and an oil return end of the next-stage telescopic oil cylinder and is gradually conveyed to the rod cavity of each stage of telescopic oil cylinder;
s2.2, oil pressure of the rod cavity rises, the piston rod is pushed by hydraulic pressure, and the rodless cavity discharges oil to the oil inlet end;
s2.3, a piston rod of the first-stage telescopic oil cylinder is compressed and contracted, and rodless cavity oil of the first-stage telescopic oil cylinder is discharged to a hydraulic system from an oil inlet end of the first-stage telescopic oil cylinder; when other piston rods contract, the piston rod of the next stage of telescopic oil cylinder is pressed to push the oil liquid in the rodless cavity to be output from the oil inlet end to the second connecting oil port of the previous stage of telescopic oil cylinder and then to be conveyed to the rodless cavity of the previous stage of telescopic oil cylinder, and finally, the oil liquid is discharged from the rodless cavity of the first stage of telescopic oil cylinder to the hydraulic system;
s2.4, the contraction of the piston rods at all levels is realized.
Preferably, the specifications of the n-stage telescopic oil cylinders are gradually decreased from the first-stage telescopic oil cylinder, and under a telescopic mode of the sequential oil cylinder system, the telescopic oil cylinders of all stages are sequentially contracted from the first-stage telescopic oil cylinder.
Preferably, the n stages of telescopic oil cylinders have the same specification, and under the contraction mode of the sequential oil cylinder system, all stages of telescopic oil cylinders contract synchronously.
An apparatus for sequentially retracting a cylinder system, comprising a sequentially retracting cylinder system as described above.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a sequential telescopic oil cylinder system, which is characterized in that a rodless cavity of a multi-stage telescopic oil cylinder is communicated through a connecting pipeline, a rod cavity of the multi-stage telescopic oil cylinder is communicated in a one-way mode through a one-way communicated oil way, a control oil way is arranged between a sealing cavity of a sealing device and a cavity of a piston rod, a piston rod at the upper stage is sealed before being completely extended out, and is communicated after being extended out, so that the control on an oil return oil way of a telescopic oil cylinder at the lower stage is realized; the invention realizes the sequential telescopic control of all levels of telescopic oil cylinders by skillfully designing the oil circuit of the telescopic oil cylinder and reasonably applying the hydraulic element and controlling the oil inlet circuit and the oil return circuit of the sequential telescopic oil cylinder system, and the sequential telescopic oil cylinder system has no mechanical collision of control elements and position limitation of a mechanical structure, so the system is more stable and reliable and has wider application range.
Drawings
Fig. 1 is a schematic structural diagram of a sequential telescopic cylinder system.
Fig. 2 is a partially enlarged view of a in fig. 1.
Fig. 3 is a schematic view of the porous structure of the control oil port in example 1.
Fig. 4 is a partially enlarged view of B in fig. 1.
FIG. 5 is a flow chart of the extend mode of the sequential telescopic cylinder system.
Fig. 6 is a schematic diagram of the configuration of the first-stage piston rod fully extended.
FIG. 7 is a flow chart of the retraction mode of the sequential retracting cylinder system.
Wherein: 100. an oil inlet end; 101. a rodless cavity; 102. a rod cavity; 103. an oil return end; 1031. an oil return port; 1032. a control oil port; 200. a piston rod; 201. a piston; 2011. sealing the cavity; 202. a telescopic end; 2021. a first connecting oil port; 2022. a second connecting oil port; 203. a cavity; 2031. a first branch; 2032. a second branch circuit; 2033. a one-way valve; 300. connecting a pipeline; 301. and (7) sealing the layer.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 to 4, in one aspect, the present invention provides a sequential telescopic cylinder system, including n stages of telescopic cylinders, where n is an integer greater than or equal to 2, and the first n-1 stage adopts a sequential telescopic cylinder; the sequential telescopic oil cylinder comprises an oil inlet end 100, a rodless cavity 101, a piston rod 200, a piston 201, a telescopic end 202, a rod cavity 102, an oil return end 103 and a sealing device, and the sequential telescopic oil cylinder has the following specific structure:
the center of the piston rod 200 is provided with a cavity 203, the telescopic end 202 is provided with a first connecting oil port 2021 and a second connecting oil port 2022, the first connecting oil port 2021 is communicated with the cavity 203, and the second connecting oil port 2022 is communicated with the rodless cavity 101 through a connecting pipeline 300; a first branch 2031 for communicating the cavity 203 and the rod cavity 102 is arranged on the piston 201, and a one-way valve 2033 for conducting the rod cavity 102 to the cavity 203 in one way is arranged in the first branch 2031; a control oil port 1032 is formed in one side, close to the piston 201, of the oil return port 1031 of the oil return end 103, a sealing cavity 2011 is formed in the middle of the sealing device, the control oil port 1032 corresponds to the position of the sealing cavity 2011 in the completely extending state of the piston rod 200, and a second branch 2032 for conducting the sealing cavity 2011 and the cavity 203 is further formed in the middle of the piston 201;
in the sequential telescopic oil cylinder system, an oil inlet end 100 and an oil return end 103 of a first-stage sequential telescopic oil cylinder are connected with a hydraulic system, a rodless cavity 101 of an nth-stage telescopic oil cylinder is communicated with the rodless cavity 101 of an nth-1-stage telescopic oil cylinder through the oil inlet end 100 of the nth-stage telescopic oil cylinder and a second connecting oil port 2022 of the nth-1-stage telescopic oil cylinder, and a rod cavity 102 of the nth-stage telescopic oil cylinder is communicated with a cavity 203 of the nth-1-stage telescopic oil cylinder through the oil return end 103 of the nth-stage telescopic oil cylinder and a first connecting oil port 2021 of the nth-1-stage telescopic oil cylinder.
A connection line 300, through which the second connection port 2022 communicates with the rodless chamber 101, is disposed in the middle of the piston 201.
It should be noted that, the connecting pipeline 300 is arranged in the middle of the piston 201, and the arrangement of the sequential telescopic oil paths is realized by improving the internal structure of the oil cylinder, so that the influence of the external environment on the telescopic oil cylinder is reduced, and the stability is better.
There is a sealing layer 301 between the connecting line 300 and the piston 201.
It should be noted that, inside the sequential oil cylinder, the rodless chamber 101 is directly communicated with the next-stage rodless chamber 101 through a connecting pipeline, and the rodless chamber 101 is isolated from the rod chamber 102, the cavity 203, the first branch 2031, and the second branch 2032.
The control oil port 1032 is of a porous structure.
It should be noted that, when the piston rod 200 extends and the piston 201 moves to the control oil port 1032, the sealing ring of the sealing device passes through the control oil port 1032, and under the action of the oil pressure inside the oil cylinder, the oil presses the sealing ring to the control oil port 1032, which easily causes the deformation and even damage of the sealing ring, so that 7 control oil ports 1032 are provided
The sealing ring can be effectively protected due to the porous structure formed by the holes; the total oil passing capacity of the porous structure is the same as the oil passing capacity of the oil return port.
The nth stage telescopic oil cylinder adopts a sequential telescopic oil cylinder.
The oil inlet end 100 and the oil return end 103 of the first-stage telescopic oil cylinder are connected with a hydraulic system, the oil inlet end 100 of the nth-stage telescopic oil cylinder is communicated with the rodless cavity 101 of the nth-1-stage telescopic oil cylinder through the second connecting oil port 2022 of the nth-1-stage telescopic oil cylinder, the oil return end 103 of the nth-stage telescopic oil cylinder is communicated with the cavity 203 of the nth-1-stage telescopic oil cylinder through the first connecting oil port 2021 of the nth-1-stage telescopic oil cylinder, and the first connecting oil port 2021 and the second connecting oil port 2022 of the nth-stage telescopic oil cylinder are sealed and blocked.
Example 2:
the embodiment provides a control method of a sequential telescopic cylinder system, which comprises an extension mode and a contraction mode:
as shown in fig. 5, the specific steps of the protraction mode are as follows:
s1.1, a hydraulic system conveys hydraulic oil to an oil inlet end 100 of a first-stage telescopic oil cylinder, the hydraulic oil enters a rodless cavity 101 of the first-stage telescopic oil cylinder, and meanwhile, the hydraulic oil is conveyed to the oil inlet end 100 of a next-stage telescopic oil cylinder through a connecting pipeline 300 in the middle of a piston 201 of the first-stage telescopic oil cylinder and a second connecting oil port 2022 of the first-stage telescopic oil cylinder to enter the rodless cavity 101 of the next-stage telescopic oil cylinder until the hydraulic oil is conveyed to the rodless cavity 101 of each stage of telescopic oil cylinder;
s1.2, oil pressure of the rodless cavity 101 rises, the piston rod 200 is pushed by hydraulic pressure, and the rod cavity 102 discharges oil to the oil return end 103;
s1.3, oil in a rod cavity 102 of the first-stage telescopic oil cylinder is discharged to a hydraulic system through an oil return end 103 of the first-stage telescopic oil cylinder, and a piston rod 200 of the first-stage telescopic oil cylinder extends out; oil in a rod cavity 102 of the next-stage telescopic oil cylinder flows to a first branch 2031 and a second branch 2032 of the cavity 203 through an oil return end 103 via a first connecting oil port 2021 and the cavity 203 of the previous-stage telescopic oil cylinder, the first branch 2031 is provided with a one-way valve 2033 to prevent the oil from being discharged, the tail end of the second branch 2032 is provided with a sealed cavity 2011, so that the oil in the sealed cavity cannot be discharged, and a piston rod 200 of the next-stage telescopic oil cylinder cannot extend out;
s1.4, the piston rod 200 of the first-stage telescopic oil cylinder is completely extended out, and a sealing cavity 2011 of the first-stage telescopic oil cylinder is communicated with a control oil port 1032, as shown in FIG. 6; the oil in the rod chamber 102 of the next stage telescopic cylinder is discharged through the second branch 2032 of the cavity 203 of the previous stage telescopic cylinder, and the piston rod 200 of the next stage telescopic cylinder begins to extend;
s1.5, sequentially extending the piston rods 200 of the telescopic oil cylinders step by step in sequence;
as shown in fig. 7, the contraction mode comprises the following steps:
s2.1, a hydraulic system conveys hydraulic oil to an oil return end 103 of a first-stage telescopic oil cylinder, the hydraulic oil enters a rod cavity 102 of the first-stage telescopic oil cylinder, is conveyed to a cavity 203 of the first-stage telescopic oil cylinder through a first branch 2031 of the first-stage telescopic oil cylinder, is conveyed to a rod cavity 102 of a next-stage telescopic oil cylinder through a first connecting oil port 2021 of the first-stage telescopic oil cylinder and the oil return end 103 of the next-stage telescopic oil cylinder, and is gradually conveyed to the rod cavity 102 of each-stage telescopic oil cylinder;
s2.2, oil pressure of the rod cavity 102 rises, the piston rod 200 is pushed by hydraulic pressure, and the rodless cavity 101 discharges oil to the oil inlet end 100;
s2.3, a piston rod 200 of the first-stage telescopic oil cylinder is compressed and contracted, and oil in a rodless cavity 101 of the first-stage telescopic oil cylinder is discharged to a hydraulic system from an oil inlet end 100 of the first-stage telescopic oil cylinder; when other piston rods 200 contract, the piston rod 200 of the next stage of telescopic cylinder is pressed to push the oil in the rodless cavity 101 to be output from the oil inlet end 100 to the second connecting oil port 2022 of the previous stage of telescopic cylinder and then to be conveyed to the rodless cavity 101 of the previous stage of telescopic cylinder, and finally, the oil is discharged from the rodless cavity 101 of the first stage of telescopic cylinder to a hydraulic system;
s2.4 effects retraction of the piston rods 200 of the various stages.
The specifications of the n-stage telescopic oil cylinders are the same, and under the contraction mode of the sequential oil cylinder system, all stages of telescopic oil cylinders contract synchronously.
Example 3:
the embodiment provides a control method of a sequential telescopic cylinder system for sequential retraction; the specific steps of the shrinkage mode are as follows:
s2.1, a hydraulic system conveys hydraulic oil to an oil return end 103 of a first-stage telescopic oil cylinder, the hydraulic oil enters a rod cavity 102 of the first-stage telescopic oil cylinder, is conveyed to a cavity 203 of the first-stage telescopic oil cylinder through a first branch 2031 of the first-stage telescopic oil cylinder, is conveyed to a rod cavity 102 of a next-stage telescopic oil cylinder through a first connecting oil port 2021 of the first-stage telescopic oil cylinder and the oil return end 103 of the next-stage telescopic oil cylinder, and is gradually conveyed to the rod cavity 102 of each-stage telescopic oil cylinder;
s2.2, oil pressure of the rod cavity 102 rises, the piston rod 200 is pushed by hydraulic pressure, and the rodless cavity 101 discharges oil to the oil inlet end 100;
s2.3, a piston rod 200 of the first-stage telescopic oil cylinder is compressed and contracted, and oil in a rodless cavity 101 of the first-stage telescopic oil cylinder is discharged to a hydraulic system from an oil inlet end 100 of the first-stage telescopic oil cylinder; when other piston rods 200 contract, the piston rod 200 of the next stage of telescopic cylinder is pressed to push the oil in the rodless cavity 101 to be output from the oil inlet end 100 to the second connecting oil port 2022 of the previous stage of telescopic cylinder and then to be conveyed to the rodless cavity 101 of the previous stage of telescopic cylinder, and finally, the oil is discharged from the rodless cavity 101 of the first stage of telescopic cylinder to a hydraulic system;
s2.4 effects retraction of the piston rods 200 of the various stages.
The specifications of the three-stage telescopic oil cylinders are gradually decreased from the first-stage telescopic oil cylinder, and the telescopic oil cylinders of all stages are sequentially contracted from the first-stage telescopic oil cylinder under the contraction mode of the first-stage sequential telescopic oil cylinder system.
Example 4:
this embodiment provides a flexible hydro-cylinder system's of order equipment, includes the flexible hydro-cylinder system of following order:
the device comprises n stages of telescopic oil cylinders, wherein n is an integer greater than or equal to 2, and the front n-1 stage adopts a sequential telescopic oil cylinder; the sequential telescopic oil cylinder comprises an oil inlet end 100, a rodless cavity 101, a piston rod 200, a piston 201, a telescopic end 202, a rod cavity 102, an oil return end 103 and a sealing device, and the sequential telescopic oil cylinder has the following specific structure:
the center of the piston rod 200 is provided with a cavity 203, the telescopic end 202 is provided with a first connecting oil port 2021 and a second connecting oil port 2022, the first connecting oil port 2021 is communicated with the cavity 203, and the second connecting oil port 2022 is communicated with the rodless cavity 101 through a connecting pipeline 300; a first branch 2031 for communicating the cavity 203 and the rod cavity 102 is arranged on the piston 201, and a one-way valve 2033 for conducting the rod cavity 102 to the cavity 203 in one way is arranged in the first branch 2031; a control oil port 1032 is formed in one side, close to the piston 201, of the oil return port 1031 of the oil return end 103, a sealing cavity 2011 is formed in the middle of the sealing device, the control oil port 1032 corresponds to the position of the sealing cavity 2011 in the completely extending state of the piston rod 200, and a second branch 2032 for conducting the sealing cavity 2011 and the cavity 203 is further formed in the middle of the piston 201;
in the sequential telescopic oil cylinder system, an oil inlet end 100 and an oil return end 103 of a first-stage sequential telescopic oil cylinder are connected with a hydraulic system, a rodless cavity 101 of an nth-stage telescopic oil cylinder is communicated with the rodless cavity 101 of an nth-1-stage telescopic oil cylinder through the oil inlet end 100 of the nth-stage telescopic oil cylinder and a second connecting oil port 2022 of the nth-1-stage telescopic oil cylinder, and a rod cavity 102 of the nth-stage telescopic oil cylinder is communicated with a cavity 203 of the nth-1-stage telescopic oil cylinder through the oil return end 103 of the nth-stage telescopic oil cylinder and a first connecting oil port 2021 of the nth-1-stage telescopic oil cylinder.
A connection line 300, through which the second connection port 2022 communicates with the rodless chamber 101, is disposed in the middle of the piston 201.
There is a sealing layer 301 between the connecting line 300 and the piston 201.
The control oil port 1032 is of a porous structure.
The nth stage telescopic oil cylinder adopts a sequential telescopic oil cylinder.
The oil inlet end 100 and the oil return end 103 of the first-stage telescopic oil cylinder are connected with a hydraulic system, the oil inlet end 100 of the nth-stage telescopic oil cylinder is communicated with the rodless cavity 101 of the nth-1-stage telescopic oil cylinder through the second connecting oil port 2022 of the nth-1-stage telescopic oil cylinder, the oil return end 103 of the nth-stage telescopic oil cylinder is communicated with the cavity 203 of the nth-1-stage telescopic oil cylinder through the first connecting oil port 2021 of the nth-1-stage telescopic oil cylinder, and the first connecting oil port 2021 and the second connecting oil port 2022 of the nth-stage telescopic oil cylinder are sealed and blocked.
The same or similar reference numerals correspond to the same or similar parts;
the terms describing positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the patent;
it should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a flexible hydro-cylinder system of order which characterized in that: the device comprises n stages of telescopic oil cylinders, wherein n is an integer greater than or equal to 2, and the front n-1 stage adopts a sequential telescopic oil cylinder; the sequential telescopic oil cylinder comprises an oil inlet end (100), a rodless cavity (101), a piston rod (200), a piston (201), a telescopic end (202), a rod cavity (102), an oil return end (103) and a sealing device, and the sequential telescopic oil cylinder has the following specific structure:
a cavity (203) is formed in the center of the piston rod (200), a first connecting oil port (2021) and a second connecting oil port (2022) are formed in the telescopic end (202), the first connecting oil port (2021) is communicated with the cavity (203), and the second connecting oil port (2022) is communicated with the rodless cavity (101) through a connecting pipeline (300); a first branch (2031) for communicating the cavity (203) and the rod cavity (102) is arranged on the piston (201), and a one-way valve (2033) for conducting the rod cavity (102) to the cavity (203) in one way is arranged in the first branch (2031); a control oil port (1032) is formed in one side, close to the piston (201), of the oil return port (1031) of the oil return end (103), a sealing cavity (2011) is formed in the middle of the sealing device, the control oil port (1032) corresponds to the position of the sealing cavity (2011) in the completely extending state of the piston rod (200), and a second branch (2032) for conducting the sealing cavity (2011) and the cavity (203) is further formed in the middle of the piston (201);
in the sequential telescopic oil cylinder system, an oil inlet end (100) and an oil return end (103) of a first-stage sequential telescopic oil cylinder are connected with a hydraulic system, a rodless cavity (101) of an nth-stage telescopic oil cylinder is communicated with the rodless cavity (101) of the nth-1-stage telescopic oil cylinder through the oil inlet end (100) of the nth-stage telescopic oil cylinder and a second connecting oil port (2022) of the nth-1-stage telescopic oil cylinder, and a rod cavity (102) of the nth-stage telescopic oil cylinder is communicated with a cavity (203) of the nth-1-stage telescopic oil cylinder through the oil return end (103) of the nth-stage telescopic oil cylinder and a first connecting oil port (2021) of the nth-1-stage telescopic oil cylinder.
2. The sequential telescopic cylinder system according to claim 1, wherein the connection line (300) of the second connection oil port (2022) communicating with the rodless chamber (101) is disposed in the middle of the piston (201).
3. A sequential telescopic cylinder system according to claim 2, characterized in that there is a sealing layer (301) between the connecting line (300) and the piston (201).
4. The sequential telescoping cylinder system of claim 1, wherein the control oil port (1032) is of a porous structure.
5. The sequential telescopic cylinder system according to claim 1, wherein the nth stage telescopic cylinder is a sequential telescopic cylinder.
6. The sequential telescopic cylinder system according to claim 5, wherein the oil inlet end (100) and the oil return end (103) of the first stage telescopic cylinder are connected to the hydraulic system, the oil inlet end (100) of the nth stage telescopic cylinder is communicated with the rodless cavity (101) of the nth-1 stage telescopic cylinder through the second connecting oil port (2022) of the nth-1 stage telescopic cylinder, the oil return end (103) of the nth stage telescopic cylinder is communicated with the cavity (203) of the nth-1 stage telescopic cylinder through the first connecting oil port (2021) of the nth-1 stage telescopic cylinder, and the first connecting oil port (2021) and the second connecting oil port (2022) of the nth stage telescopic cylinder are blocked in a closed manner.
7. A method for controlling a sequential telescopic cylinder system according to claim 1, comprising two modes of an extension mode and a retraction mode:
the specific steps of the extension mode are as follows:
s1.1, a hydraulic system conveys hydraulic oil to an oil inlet end (100) of a first-stage telescopic oil cylinder, the hydraulic oil enters a rodless cavity (101) of the first-stage telescopic oil cylinder, and meanwhile, the hydraulic oil is conveyed to the oil inlet end (100) of a next-stage telescopic oil cylinder through a connecting pipeline (300) in the middle of a piston (201) of the first-stage telescopic oil cylinder and a second connecting oil port (2022) of the first-stage telescopic oil cylinder to enter the rodless cavity (101) of the next-stage telescopic oil cylinder until the hydraulic oil is conveyed to the rodless cavity (101) of each stage of telescopic oil cylinder;
s1.2, oil pressure of a rodless cavity (101) rises, a piston rod (200) receives hydraulic thrust, and a rod cavity (102) discharges oil to an oil return end (103);
s1.3, oil in a rod cavity (102) of the first-stage telescopic oil cylinder is discharged to a hydraulic system through an oil return end (103) of the first-stage telescopic oil cylinder, and a piston rod (200) of the first-stage telescopic oil cylinder extends out; oil in a rod cavity (102) of a next-stage telescopic oil cylinder flows to a first branch (2031) and a second branch (2032) of a cavity (203) through an oil return end (103) via a first connecting oil port (2021) of a previous-stage telescopic oil cylinder and the cavity (203), the oil is prevented from being discharged by a check valve (2033) of the first branch (2031), a sealed cavity (2011) is arranged at the tail end of the second branch (2032), the oil in the sealed cavity cannot be discharged, and a piston rod (200) of the next-stage telescopic oil cylinder cannot extend out;
s1.4, a piston rod (200) of a first-stage telescopic oil cylinder extends completely, a sealing cavity (2011) of the first-stage telescopic oil cylinder is communicated with a control oil port (1032), oil in a rod cavity (102) of a next-stage telescopic oil cylinder is discharged through a second branch (2032) of a cavity (203) of a previous-stage telescopic oil cylinder, and the piston rod (200) of the next-stage telescopic oil cylinder begins to extend;
s1.5, similarly, the sequential telescopic oil cylinder piston rods (200) extend out step by step in sequence;
the specific steps of the shrinkage mode are as follows:
s2.1, a hydraulic system conveys hydraulic oil to an oil return end (103) of a first-stage telescopic oil cylinder, the hydraulic oil enters a rod cavity (102) of the first-stage telescopic oil cylinder, is conveyed to a cavity (203) of the first-stage telescopic oil cylinder through a first branch (2031) of the first-stage telescopic oil cylinder, is conveyed to the rod cavity (102) of a next-stage telescopic oil cylinder through a first connecting oil port (2021) of the first-stage telescopic oil cylinder and the oil return end (103) of the next-stage telescopic oil cylinder, and is gradually conveyed to the rod cavity (102) of each stage of telescopic oil cylinder;
s2.2, oil pressure of the rod cavity (102) rises, the piston rod (200) is pushed by hydraulic pressure, and the rodless cavity (101) discharges oil to the oil inlet end (100);
s2.3, a piston rod (200) of the first-stage telescopic oil cylinder is compressed and contracted, and oil in a rodless cavity (101) of the first-stage telescopic oil cylinder is discharged to a hydraulic system from an oil inlet end (100) of the first-stage telescopic oil cylinder; other piston rods (200) contract, the piston rod (200) of the next stage of telescopic oil cylinder pushes the rodless cavity (101) to output oil from the oil inlet end (100) to the second connecting oil port (2022) of the previous stage of telescopic oil cylinder to be conveyed to the rodless cavity (101) of the previous stage of telescopic oil cylinder, and finally the oil is discharged from the rodless cavity (101) of the first stage of telescopic oil cylinder to a hydraulic system;
s2.4, the piston rods (200) at all stages are contracted.
8. The method of claim 7, wherein the n-stage telescopic cylinder is sequentially decreased in size from the first stage telescopic cylinder, and the telescopic cylinders of the respective stages are sequentially contracted from the first stage telescopic cylinder in a contraction mode of the sequential cylinder system.
9. The method according to claim 7, wherein the n-stage telescopic cylinders have the same specification, and the telescopic cylinders of each stage are synchronously contracted in a contraction mode of the sequential cylinder system.
10. An apparatus of a sequential telescopic cylinder system, comprising the sequential telescopic cylinder system as claimed in claim 1.
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| CN202111648175.XA CN114294297A (en) | 2021-12-29 | 2021-12-29 | Sequential telescopic oil cylinder system, control method and equipment thereof |
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| CN202111648175.XA CN114294297A (en) | 2021-12-29 | 2021-12-29 | Sequential telescopic oil cylinder system, control method and equipment thereof |
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