CN205663449U - Two telescoping mast shock resistance - Google Patents
Two telescoping mast shock resistance Download PDFInfo
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- CN205663449U CN205663449U CN201620508386.1U CN201620508386U CN205663449U CN 205663449 U CN205663449 U CN 205663449U CN 201620508386 U CN201620508386 U CN 201620508386U CN 205663449 U CN205663449 U CN 205663449U
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Abstract
The utility model relates to a two telescoping mast shock resistance, including outside -in nested one -level jar in proper order, keep apart jar, activity jar and activity king -rod, be equipped with the liquid outlet of intercommunication one -level jar epicoele at the top of one -level jar, return the liquid mouth what the top of activity jar was equipped with intercommunication activity jar cavity of resorption, aprowl set up the logical oil pocket of intercommunication one -level jar cavity of resorption and activity jar epicoele on the pole, the bottom that leads to the oil pocket is equipped with the stroke check valve of the logical oil pocket of switch. The utility model discloses use activity king -rod replaces traditional second grade jar, the shock resistance of stand has been promoted, while increases safe mouth and prevents bloated mouthful on the one -level jar, incremental control mouth on the activity jar, adjust with this and keep apart jar and the running state of activity jar at flexible in -process, can realize quick liter, the post falls, and can provide high initiative setting load, can avoid simultaneously the bloated jar phenomenon of two telescoping mast in the appearance of operation in -process, the security of two telescoping mast operation in -process is greatly improved.
Description
Technical field
This utility model relates to a kind of shock resistance double-telescopic upright post, particularly relates to a kind of underground mining hydraulic support pair and stretches
Contracting column, belongs to hydraulic prop technical field.
Background technology
Hydraulic support as the most important support apparatus of fully-mechanized mining working, be responsible for balance roof pressure, supported face,
Isolation goaf, safeguard the task of Stope safty working space.Along with work surface efficiently combines the development of technology of adopting in recent years,
Combine and adopt full-seam mining recovery method and be increasingly becoming the main flow of thick coal-layer mining because of its high resource recovery, high ature of coal, high efficiency
Direction, promotes hydraulic support gradually to high supporting height, the development of high workload drag direction.Double telescopic hydraulic cylinders (column) are because of its row
Journey length, magnification are widely used in greatly hydraulic support (can improve the adaptability of hydraulic support).Double telescopic hydraulic cylinders are (vertical
Post) as the main pressure-containing member of hydraulic support, its performance performance (high actively setting load, shock resistance) to hydraulic support
There is extremely important impact.
The current the highest supporting height of domestic hydraulic support has reached 8.8 meters (ZY26000/40/88D, column cylinder diameter 600mm),
When the increase of hydraulic support cylinder diameter causes roof of coal face to press, hydraulic cylinder instantaneous emulsion output, exponentially goes upAnd middle cylinder is little due to bearing area, in identical working resistance lower pillar stand, cylinder pressure is much larger than column first-stage cylinder pressure
Power (as a example by shield type large mining height hydraulic support ZY21000/38/82, when first-stage cylinder pressure is 40MPa operating pressure, middle cylinder
Pressure has reached more than 74MPa), when the high-flow safety valve being connected with hydraulic support can not earial drainage in time time (existing hydraulic support
Column high-flow safety valve maximum stream flow is 1000L/min, it is difficult to meets shock loading and carrys out the moment of interim column first-stage cylinder
Vent flow), easily occur, because of the swollen cylinder of cylinder, the quick-fried situation of drum in the column that fall post causes not in time, there is great potential safety hazard.
Industry field is known, and hydraulic support actively setting load has extremely important impact to support-Surrounding Rock System balance,
High trestle actively setting load can be improved support management top board ability, improve bracket support effect, reduction support from the most just support
To the fall post amount in constant-resistance stage, reduce and move top board settling amount before and after frame.And fully-mechanized mining working is tediously long due to industrial pipeline, pumping plant supplies
Hydraulic coupling loss is big, and as a example by pump station pressure 31.5MPa, emulsion is when feed liquid pipeline arrival is with liquid support, and pressure is the most
It is down to 28MPa, it is contemplated that the unlatching pressure of stroke check valve and choke pressure loss, being actually reached middle cylinder pressure can be down to
22MPa, seriously reduces the active setting load of support.The mode of existing raising Setting Load of Powered Supports is often for improving emulsion
Pumping plant liquid supply pressure, increase setting load keep system, increase column boost-up circuit etc., and emulsion power pack is by sealing, driving motor
The factor restrictions such as installation dimension, existing liquid supply pressure is up to 43MPa (cost is the highest)；Increase just support pressurizer to improve
The redundancy of work surface liquid-supplying system so that liquid-supplying system is increasingly complex.
One of key performance of hydraulic support be hydraulic support dust cycle (setting prop, fall post, actively just support,
Passive just support, weighing apparatus resistance, fall post), fast lifting post ability can shorten the cycle period of hydraulic support, improve hydraulic support from
Move speed, automatically with motor speed, thus improve the production efficiency of fully-mechanized mining working, existing increase column ascending, descending post speed is often
By increasing column and enter, realizing by the way of liquid return hole diameter, but which is affected by pump station pressure and pipeline layout, has bigger
Limitation.
To sum up, how existing hydraulic support double-telescopic upright post is in the condition not increasing fully-mechanized mining working feed flow loop redundancy
Lower high actively setting load, the fast lifting post ability realizing hydraulic support, and the impact resistance of column when improving roof weighting
Can, thus improve the ability of hydraulic support management top board, become the problem that those skilled in the art need solve.
Utility model content
For the deficiencies in the prior art, this utility model provides the shock resistance double-telescopic upright post of a kind of new structure,
The high performance hydraulic cylinder that under the conditions of fast lifting post, equal feed flow, setting load is higher, shock resistance is higher can be realized.
The technical solution of the utility model is as follows:
A kind of shock resistance double-telescopic upright post, including first-stage cylinder, isolation cylinder, movable cylinder and activity that ecto-entad is nested successively
Middle bar, in activity, the top of bar is provided with upper piston, bottom is provided with lower piston, and the bottom of isolation cylinder is fixing with lower piston to be connected, on
Piston is positioned at movable cylinder, and first-stage cylinder inner chamber is divided into first-stage cylinder epicoele and first-stage cylinder cavity of resorption by lower piston, and upper piston is by activity
Cylinder inner chamber is divided into movable cylinder epicoele and movable cylinder cavity of resorption, be communicated with in the bottom of first-stage cylinder first-stage cylinder cavity of resorption inlet and
Safe mouth, is communicated with the liquid outlet of first-stage cylinder epicoele at the top of first-stage cylinder, is communicated with movable cylinder at the top of movable cylinder
The liquid return hole of cavity of resorption, aprowl offers connection first-stage cylinder cavity of resorption and the logical oil pocket of movable cylinder epicoele, the end of logical oil pocket on bar
Portion is provided with the stroke check valve of the logical oil pocket of switch.
Preferably, the cylinder barrel of described movable cylinder offers blow vent, blow vent connection isolation cylinder inner chamber.
Preferably, the top of described movable cylinder is provided with movable cylinder cylinder head, bottom is provided with movable cylinder piston, on movable cylinder piston
Offering gas outlet, in activity, bar runs through movable cylinder piston, and gas outlet is connected with blow vent.This design is advantageous in that, every
Gas from cylinder inner chamber can pass through the outwardly inspiration of gas outlet, blow vent or discharge.
Preferably, the top in first-stage cylinder is additionally provided with the anti-swollen mouth of connection first-stage cylinder epicoele.The advantage of this design is, should
Double-telescopic upright post when being applied on hydraulic support, hydraulic support action setting prop, fall post time first-stage cylinder rod end chamber (first-stage cylinder
Epicoele) pressure jump when there may be holding and column action, set up anti-swollen mouth at first-stage cylinder epicoele, coordinate with overflow valve
The anti-swollen purpose of first-stage cylinder rod end chamber can be realized.
Preferably, the top at movable cylinder is communicated with the control mouth of movable cylinder epicoele.This design is advantageous in that, passes through
Controlling mouth and connect four two-port valves of electro-hydraulic control, the F.F. that can realize double-telescopic upright post returns to, high setting load and the mesh of overload pressure release
's.
Preferably, lower piston is provided with sealing ring and three double jets rings with the contact position of first-stage cylinder inwall.
Preferably, movable cylinder piston and activity are provided with between bar movable cylinder fairlead, movable cylinder fairlead is arranged
There are sealing ring, dust ring and guide ring.The advantage of this design is, movable cylinder piston is through bar in activity, and movable cylinder is upper
During moving or declining, the movable cylinder fairlead on movable cylinder piston inner hole can improve and sealing between bar in activity
Property, the cylinder piston of reduction activity simultaneously frictional force in moving process.
Preferably, it is provided with sealing ring and double jets ring between the inwall of upper piston and movable cylinder.
Preferably, between top and the isolation cylinder of first-stage cylinder, it is provided with first-stage cylinder fairlead, first-stage cylinder fairlead is arranged
There are sealing ring and guide ring.This design is advantageous in that, on the one hand first-stage cylinder fairlead can improve sealing, prevents leakage of oil,
On the other hand frictional resistance when isolation cylinder runs can be reduced.
A kind of hydraulic system containing shock resistance double-telescopic upright post, including above-mentioned shock resistance double-telescopic upright post, first spherical section
Only valve, the second ball check valve, 3-position 4-way electro-hydraulic reversing valve, hydraulic control one-way valve, first-stage cylinder relief valve, anti-swollen cylinder relief valve,
Four two-way electro-hydraulic reversing valves and movable cylinder relief valve；Inlet be sequentially connected with hydraulic control one-way valve, 3-position 4-way electro-hydraulic reversing valve,
First ball check valve and feed tube, liquid outlet and movable cylinder liquid return hole are sequentially connected with 3-position 4-way electro-hydraulic reversing valve, the second ball
Shape stop valve and drain pipe, safe mouth connects first-stage cylinder relief valve, and anti-swollen mouth connects anti-swollen relief valve, controls mouth and connects four two
Logical electro-hydraulic reversing valve, four two-way electro-hydraulic reversing valves are also connected with feed tube, drain pipe and movable cylinder relief valve.
The using method of a kind of hydraulic system containing shock resistance double-telescopic upright post, comprises the following steps,
(1) setting prop, fall post process:
Setting prop at a slow speed: open left 1 and first spherical of the right position of 3-position 4-way electro-hydraulic reversing valve, four two-way electro-hydraulic reversing valves
Stop valve, emulsion passes sequentially through the first ball check valve, 3-position 4-way electro-hydraulic reversing valve, hydraulic control one-way valve from feed tube, enters
Liquid mouth enters first-stage cylinder cavity of resorption, and now stroke check valve is not switched on, and along with the rising of emulsion pressure, isolation cylinder is protruding,
When lower piston touches first-stage cylinder fairlead, isolation cylinder reaches rated travel, along with the continuation of emulsion pressure rises, and emulsifying
Liquid backs down stroke check valve, and emulsion enters into movable cylinder epicoele by the logical oil pocket of bar in activity, along with the pressure of emulsion
Continue to increase, outside jacking activity cylinder, complete movable two grades of setting prop processes of cylinder；
Quickly setting prop: open right 1 and first spherical of the right position of 3-position 4-way electro-hydraulic reversing valve, four two-way electro-hydraulic reversing valves
Stop valve, emulsion passes sequentially through the first ball check valve, 3-position 4-way electro-hydraulic reversing valve, hydraulic control one-way valve from feed tube, enters
Liquid mouth enter first-stage cylinder cavity of resorption, simultaneously emulsion by four two way selected valves of electro-hydraulic control through control mouth entrance activity cylinder epicoele, with
The rising of emulsion pressure, isolation cylinder and movable cylinder the most protruding, when lower piston touches first-stage cylinder fairlead, activity
When cylinder fairlead touches upper piston, column completes quick setting prop process；
Post drops at a slow speed: open the left position of three position four-way directional control valve, left 1 of four two way selected valves, the first ball check valve and
Second ball check valve, emulsion enters under first-stage cylinder epicoele, movable cylinder through the first ball check valve, three position four-way directional control valve
Chamber, due to the restriction of stroke check valve, post first drops in isolation cylinder, after isolation cylinder reaches rated travel, stroke check valve touching one
Level cylinder cylinder bottom is opened, and on movable cylinder, the emulsion of intracavity is discharged be back to emulsion via logical oil pocket, inlet, hydraulic control one-way valve
Case, completes movable two grades of fall post processes of cylinder；
Fast prompt drop post: open the left position of three position four-way directional control valve, right 2 of four two way selected valves, the first ball check valve and
Second ball check valve, emulsion enters under first-stage cylinder epicoele, movable cylinder through the first ball check valve, three position four-way directional control valve
Chamber, movable cylinder and isolation cylinder decline simultaneously, and under first-stage cylinder, the emulsion of intracavity changes through inlet, hydraulic control one-way valve, 3-position 4-way
Flowing back to emulsion box to valve, on movable cylinder, the emulsion of intracavity flows back to emulsion box through controlling mouth and four two way selected valves, complete
Become fast prompt drop post process.
The beneficial effects of the utility model are:
This utility model shock resistance double-telescopic upright post changes the version of traditional double telescopic column, uses brand-new design
Activity in bar replace tradition secondary cylinder, improve the shock resistance that column is overall, on first-stage cylinder casing wall, increase peace simultaneously
Quan Kou and anti-swollen mouth, be also additionally arranged isolation cylinder and cut off and close realizing oil circuit, prevent outside air from entering cylinder interior, living
Increase on dynamic cylinder and control mouth and supporting four two way selected valves, realize first-stage cylinder and movable cylinder fortune in telescopic process with this
Row state, it is possible to realize quick ascending, descending post, and be provided that high actively setting load, simultaneously it can be avoided that double-telescopic upright post is running
During occur swollen cylinder phenomenon, substantially increase the safety in double-telescopic upright post running.Compare traditional double flexible
Column efficiency is high, safety is high, has good effect and effect, is worthy of popularization.
Accompanying drawing explanation
Fig. 1 is the sectional view of this utility model shock resistance double-telescopic upright post；
Fig. 2 is the enlarged drawing of I part in Fig. 1；
Fig. 3 is the enlarged drawing of II part in Fig. 1；
Fig. 4 is the enlarged drawing of III part in Fig. 1；
Fig. 5 is the hydraulic schematic diagram (before isolation cylinder stretches out) of this utility model shock resistance double-telescopic upright post；
Fig. 6 is the hydraulic schematic diagram (after isolation cylinder stretches out) of this utility model shock resistance double-telescopic upright post；
Fig. 7 is the hydraulic schematic diagram (after movable cylinder stretches out) of this utility model shock resistance double-telescopic upright post；
Fig. 8 is isolation cylinder and the annexation schematic diagram of bar in activity；
Fig. 9 is the structural representation of movable cylinder；
Figure 10 is the structural representation of movable cylinder piston；
Wherein: 1, first-stage cylinder cylinder bottom；2, first-stage cylinder oil-in；3, double jets ring；4, at the bottom of bar；5, dust ring；6, guide
Ring；7, movable cylinder fairlead；8, first-stage cylinder cylinder barrel；9, movable cylinder cylinder barrel；10, bar in activity；11, double jets ring；12, seal
Circle；13, sealing ring；14, first-stage cylinder fairlead；15, seal with annular groove step；16, oil duct；17 sealing rings；18, feed tube；19, go out
Liquid pipe；20, the second ball check valve；21, the first ball check valve；22, three position four-way directional control valve；23, hydraulic control one-way valve；24、
First-stage cylinder；25, stroke check valve；26, lower piston；27, first-stage cylinder relief valve；28, movable cylinder；29, anti-swollen relief valve；30, live
Dynamic cylinder relief valve；31, four two way selected valves；32, mouth is controlled；33, liquid return hole；34, liquid outlet；35, inlet；36, safety
Mouthful；37, logical oil pocket；38, anti-swollen mouth；39, isolation cylinder；40, upper piston；41, gas outlet；42, blow vent；43, movable cylinder cylinder head；
44, movable cylinder piston.
Detailed description of the invention
Below by embodiment and combine accompanying drawing this utility model is described further, but it is not limited to this.
Embodiment 1:
As shown in Figures 1 to 4, the present embodiment provides a kind of shock resistance double-telescopic upright post, the most nested including ecto-entad
First-stage cylinder 24, isolation cylinder 39, movable cylinder 28 and activity in bar 10, in activity, the top of bar 10 is provided with upper piston 40, bottom sets
Having lower piston 26, the bottom of isolation cylinder 39 to weld together with lower piston 26, upper piston 40 is positioned at movable cylinder 28, lower piston 26
First-stage cylinder inner chamber is divided into first-stage cylinder epicoele and first-stage cylinder cavity of resorption, and activity cylinder inner chamber is divided into movable cylinder epicoele by upper piston 40
With movable cylinder cavity of resorption, it is communicated with inlet 35 and the safe mouth 36 of first-stage cylinder cavity of resorption in the bottom of first-stage cylinder 24, in first-stage cylinder
Top be communicated with the liquid outlet 34 of first-stage cylinder epicoele, be communicated with the liquid return hole of movable cylinder cavity of resorption at the top of movable cylinder
33, aprowl offer connection first-stage cylinder cavity of resorption and the logical oil pocket 37 of movable cylinder epicoele on bar, the bottom of logical oil pocket is provided with out
Close the stroke check valve 25 of logical oil pocket.
The top of movable cylinder is provided with movable cylinder cylinder head 43, bottom is provided with movable cylinder piston 44, and movable cylinder cylinder head 43 is with movable
Cylinder cylinder barrel 9 welds together, and movable cylinder piston 44 is threadeded with the bottom of movable cylinder, and movable cylinder cylinder barrel 9 offers ventilation
Mouth 42, movable cylinder piston 44 offers gas outlet 41, and in activity, bar 10 runs through movable cylinder piston 44, gas outlet 41 and blow vent
42 are connected.The gas of isolation cylinder inner chamber can pass through the outwardly inspiration of gas outlet, blow vent or discharge, and blow vent was provided with
Filter, prevents introduced contaminants from entering.
The anti-swollen mouth 38 of connection first-stage cylinder epicoele it is additionally provided with at the top of first-stage cylinder 24.This double-telescopic upright post is being applied to
Time on hydraulic support, the holding that may be present of first-stage cylinder rod end chamber and column action when hydraulic support action setting prop, fall post
Time pressure jump, newly established anti-swollen mouth at column first-stage cylinder epicoele, coordinated with overflow valve and can realize first-stage cylinder piston rod
The anti-swollen purpose in chamber.
The control mouth 32 of movable cylinder epicoele it is communicated with at the top of movable cylinder 28.Electro-hydraulic control four is connected by controlling mouth
Two-port valve, the F.F. that can realize double-telescopic upright post returns to, high setting load and the purpose of overload pressure release.
Lower piston 26 is provided with sealing ring 17 and three double jets rings 3 with the contact position of first-stage cylinder inwall, wherein has two
Individual double jets ring is arranged on the place that below sealing ring 17, oil liquid pressure is big, and a double jets ring is arranged on sealing ring 17
Top, as shown in Figure 2.
Movable cylinder piston 44 and activity are provided with inversion type activity cylinder fairlead 7, on movable cylinder fairlead 7 between bar 10
It is provided with sealing ring 13, dust ring 5 and guide ring 6, as shown in Figure 3.
Being provided with sealing ring 12 and double jets ring 11 between the inwall of upper piston 40 and movable cylinder 28, high-pressure side dress is double leads
Xiang Huan, the single guide ring of low-pressure side dress, as shown in Figure 4.
It is provided with first-stage cylinder fairlead 14 between top and the isolation cylinder 39 of first-stage cylinder 24, first-stage cylinder fairlead 14 is arranged
There are sealing ring and guide ring, as shown in Figure 4.
The technical scheme of the present embodiment, compared with traditional double-telescopic upright post, uses bar in activity to replace traditional two grades
Cylinder, its shock resistance is substantially better than traditional double-telescopic upright post, has more preferable anti-impact when being applied to underground hydraulic support frame
Hit effect.On movable cylinder, offer control mouth simultaneously, in first-stage cylinder, offered anti-swollen mouth, on the one hand can realize column
Fast lifting post, on the other hand can be prevented effectively from the swollen cylinder problem that column occurs in the course of the work, substantially increase column
Safety.
Embodiment 2:
As it is shown in figure 5, a kind of hydraulic system containing shock resistance double-telescopic upright post, including shock resistance as described in Example 1
Double-telescopic upright post, first ball check valve the 21, second ball check valve 20,3-position 4-way electro-hydraulic reversing valve 22, hydraulic control one-way valve
23, first-stage cylinder relief valve 27, anti-29, four two-way electro-hydraulic reversing valves 31 of swollen relief valve and movable cylinder relief valve 30；Inlet 35
It is sequentially connected with hydraulic control one-way valve 23,3-position 4-way electro-hydraulic reversing valve the 22, first ball check valve 21 and feed tube 18, liquid outlet 34
And activity cylinder liquid return hole 33 is sequentially connected with 3-position 4-way electro-hydraulic reversing valve the 22, second ball check valve 20 and drain pipe 19, safety
Mouth 36 connects first-stage cylinder relief valve 27, and anti-swollen mouth 38 connects anti-swollen relief valve 29, and control mouth 32 connects four electro-hydraulic commutations of two-way
Valve 31, four two-way electro-hydraulic reversing valves 31 are also connected with feed tube 18 and movable cylinder relief valve 30.
Embodiment 3:
A kind of using method of the hydraulic system containing shock resistance double-telescopic upright post described in embodiment 2, process is as follows,
(1) setting prop, fall post process:
Setting prop at a slow speed: open the right position of 3-position 4-way electro-hydraulic reversing valve 22, four two-way electro-hydraulic reversing valves 31 left 1 and feed liquors
The first ball check valve 21 on pipe 18, emulsion passes sequentially through the first ball check valve 21,3-position 4-way electricity from feed tube 18
Liquid reversal valve 22, hydraulic control one-way valve 23, inlet 35 enter first-stage cylinder cavity of resorption, and now stroke check valve 25 is not switched on, along with breast
Changing the rising of hydraulic coupling, in activity, bar 10 is protruding, when lower piston 26 touches first-stage cylinder fairlead 14, and bar 10 in activity
Reaching rated travel, along with the continuation of emulsion pressure rises, emulsion backs down stroke check valve 25, and emulsion is by activity
The logical oil pocket 37 of bar 10 enters into movable cylinder epicoele, along with the pressure of emulsion continues to increase, and outside jacking activity cylinder 28, movable
Cylinder 28 gradually stretches out in isolation cylinder 39, completes movable 28 2 grades of setting prop processes of cylinder；
Quickly setting prop: open the right position of 3-position 4-way electro-hydraulic reversing valve 22, four two-way electro-hydraulic reversing valves 31 right 1 and feed liquors
The first ball check valve 21 on pipe 18, emulsion passes sequentially through the first ball check valve 21,3-position 4-way electricity from feed tube 18
Liquid reversal valve 22, hydraulic control one-way valve 23, inlet 35 enter first-stage cylinder cavity of resorption, and emulsion is by four two-way commutations of electro-hydraulic control simultaneously
Valve 31 is through controlling mouth 32 entrance activity cylinder epicoele, along with the rising of emulsion pressure, in activity bar 10 and movable cylinder 28 simultaneously to
Overhang, when lower piston 26 touch first-stage cylinder fairlead 14, movable cylinder fairlead touch upper piston time, column completes quickly
Setting prop process；
Post drops at a slow speed: open the left position of three position four-way directional control valve 22, four two way selected valves 31 left 1, the first spherical cut-offs
Valve 21 and the second ball check valve 20, emulsion enters in first-stage cylinder through the first ball check valve 21, three position four-way directional control valve 22
Chamber, movable cylinder cavity of resorption, due to the restriction of stroke check valve 25, and if only if after post drops in isolation cylinder 39, the breast of intracavity on movable cylinder
Changing liquid to be flowed out by the logical oil pocket 37 of bar in activity, therefore post first drops in isolation cylinder 39, after isolation cylinder 39 reaches rated travel, OK
Journey check valve 25 is opened when touching first-stage cylinder cylinder bottom 1, on movable cylinder the emulsion of intracavity via the logical oil pocket 37 of bar in activity, enter
Liquid mouth 35, hydraulic control one-way valve 23, three position four-way directional control valve the 22, second ball check valve 20 are discharged and are back to emulsion box, complete
Two grades of fall post processes；
Fast prompt drop post: open the left position of three position four-way directional control valve 22, four two way selected valves right 2, the first ball check valves
21 and second ball check valve 20, emulsion road after the first ball check valve 21, three position four-way directional control valve 22 enters one-level
Cylinder epicoele, another road entrance activity cylinder cavity of resorption, owing to four two way selected valves are in right 2, now control mouth connection, movable cylinder
28 and isolation cylinder 39 decline simultaneously, under first-stage cylinder the emulsion of intracavity through inlet 35, hydraulic control one-way valve 23,3-position 4-way commutation
Valve the 22, second ball check valve 20 flows back to emulsion box, and on movable cylinder, the emulsion of intracavity changes through controlling mouth 32 and four two-ways
Flow back to emulsion box to valve 31, complete fast prompt drop post process.
Claims (8)
1. a shock resistance double-telescopic upright post, it is characterised in that include the ecto-entad first-stage cylinder of nesting, isolation cylinder, work successively
Bar in dynamic cylinder and activity, in activity, the top of bar is provided with upper piston, bottom is provided with lower piston, and the bottom of isolation cylinder is solid with lower piston
Fixed connection, upper piston is positioned at movable cylinder, and first-stage cylinder inner chamber is divided into first-stage cylinder epicoele and first-stage cylinder cavity of resorption, upper work by lower piston
Activity cylinder inner chamber is divided into movable cylinder epicoele and movable cylinder cavity of resorption by plug, is communicated with first-stage cylinder cavity of resorption in the bottom of first-stage cylinder
Inlet and safe mouth, be communicated with the liquid outlet of first-stage cylinder epicoele at the top of first-stage cylinder, is provided with even at the top of movable cylinder
The liquid return hole of logical movable cylinder cavity of resorption, aprowl offers connection first-stage cylinder cavity of resorption and the logical oil pocket of movable cylinder epicoele on bar, logical
The bottom of oil pocket is provided with the stroke check valve of the logical oil pocket of switch.
2. shock resistance double-telescopic upright post as claimed in claim 1, it is characterised in that offer logical on the cylinder barrel of described movable cylinder
QI KOU, blow vent connection isolation cylinder inner chamber.
3. shock resistance double-telescopic upright post as claimed in claim 2, it is characterised in that the top of described movable cylinder is provided with movable cylinder
Cylinder head, bottom are provided with movable cylinder piston, and movable cylinder piston offers gas outlet, and in activity, bar runs through movable cylinder piston, gives vent to anger
Mouth is connected with blow vent.
4. shock resistance double-telescopic upright post as claimed in claim 1, it is characterised in that be additionally provided with connection one at the top of first-stage cylinder
The anti-swollen mouth of level cylinder epicoele.
5. shock resistance double-telescopic upright post as claimed in claim 1, it is characterised in that be communicated with activity at the top of movable cylinder
The control mouth of cylinder epicoele.
6. shock resistance double-telescopic upright post as claimed in claim 1, it is characterised in that lower piston and the contact position of first-stage cylinder inwall
It is provided with sealing ring and three double jets rings.
7. shock resistance double-telescopic upright post as claimed in claim 3, it is characterised in that set between bar in movable cylinder piston and activity
It is equipped with movable cylinder fairlead, movable cylinder fairlead is provided with sealing ring, dust ring and guide ring.
8. shock resistance double-telescopic upright post as claimed in claim 1, it is characterised in that set between the inwall of upper piston and movable cylinder
It is equipped with sealing ring and double jets ring；
It is provided with first-stage cylinder fairlead between top and the isolation cylinder of first-stage cylinder, first-stage cylinder fairlead is provided with sealing ring and leads
Xiang Huan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620508386.1U CN205663449U (en) | 2016-05-30 | 2016-05-30 | Two telescoping mast shock resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620508386.1U CN205663449U (en) | 2016-05-30 | 2016-05-30 | Two telescoping mast shock resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205663449U true CN205663449U (en) | 2016-10-26 |
Family
ID=57157691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620508386.1U Expired - Fee Related CN205663449U (en) | 2016-05-30 | 2016-05-30 | Two telescoping mast shock resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205663449U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840218A (en) * | 2016-05-30 | 2016-08-10 | 山东科技大学 | Anti-impact double-telescopic stand column and application thereof |
-
2016
- 2016-05-30 CN CN201620508386.1U patent/CN205663449U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840218A (en) * | 2016-05-30 | 2016-08-10 | 山东科技大学 | Anti-impact double-telescopic stand column and application thereof |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20161026 Termination date: 20170530 |