CN203529814U - Variable amplitude control system for fixed fly jib of crane - Google Patents
Variable amplitude control system for fixed fly jib of crane Download PDFInfo
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- CN203529814U CN203529814U CN201320609708.8U CN201320609708U CN203529814U CN 203529814 U CN203529814 U CN 203529814U CN 201320609708 U CN201320609708 U CN 201320609708U CN 203529814 U CN203529814 U CN 203529814U
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Abstract
The utility model discloses a variable amplitude control system for a fixed fly jib of a crane. The variable amplitude control system comprises an oil source, a control valve and two parallel arranged cylinders, wherein the first oil outlet of the control valve is communicated with non-rod cavities of the two cylinders, the second oil outlet of the control valve is respectively communicated with rod cavities of the two cylinders; the non-rod cavities of the two cylinders are communicated with each other through a first through pipeline, and the rod cavities of the two cylinders are communicated with each other through a second through pipeline. By adopting the structure, in the working process of the two cylinders, pressure and flow of the non-rod cavities of the two cylinders can be balanced by virtue of the first through pipeline, and pressure and flow of the rod cavities of the two cylinders can be balanced by virtue of the second through pipeline, so that the two cylinders can meet the designing requirement for precisely synchronous movement, and safety accidents can be avoided.
Description
Technical field
The utility model relates to technical field of engineering machinery, relates in particular to the fixedly luffing control system of auxiliary of a kind of hoisting crane.
Background technology
On ultra-large type hoisting crane, dispose for hoisting and falling the fixedly luffing device of auxiliary, for make fixing auxiliary luffing convenient and swift, accelerate job scheduling and increase the ability of continuous amplitude transforming, conventionally adopt oil-cylinder variable amplitude, by the free-extension of amplitude oil cylinder, realize the fixedly stepless luffing of auxiliary, guarantee the operating efficiency of hoisting crane.
Please refer to Fig. 1, Fig. 1 is the fixing structural representation of the luffing device of auxiliary of hoisting crane in prior art, briefly introduces the principle of work of said apparatus and the technological deficiency of existence thereof below.
As shown in Figure 1, swivel mount 2 ＇ that this luffing device comprises support 1 ＇, is rotationally connected with support 1 ＇, and be connected in two amplitude oil cylinder 3 ＇ between support 1 ＇, swivel mount 2 ＇.In working process, adopt two control cock to control separately respectively the flow of the hydraulic oil of two amplitude oil cylinder 3 ＇, drive the continuous and adjustable of two oil cylinder 3 ＇, make swivel mount and support form the continually varying anglec of rotation, thereby realize the fixedly electrodeless luffing of auxiliary, finally change crane job operating mode.
Above-mentioned luffing device adopts two oil cylinder forms, can adapt to larger loading demand, but owing to being subject to the manufacturing dimension error of hydraulic actuating cylinder, the suffered outer load imbalance of two oil cylinders, the impact of the factor such as the friction coefficient of the sealing members such as two oil cylinder pistons, orienting sleeve is inconsistent very easily there is asynchrony phenomenon in two oil cylinder 3 ＇ in motion process.Once and this phenomenon produces, rotation rack structure, due to stressed unbalanced in both sides, can cause the fixedly side sway of auxiliary, finally damages framing member, and cause lifting inaccurate, easily cause safety misadventure.
In view of this, urgently, for the luffing control system of a kind of fixedly auxiliary of above-mentioned luffing device design, to guarantee the synchronism of two oil cylinders, avoid the generation of safety misadventure.
Utility model content
The purpose of this utility model, for a kind of luffing control system of fixedly auxiliary of hoisting crane is provided, by being communicated with the rodless cavity of two oil cylinders and the rod chamber of two oil cylinders of connection, has realized two oil cylinder synchronization actions, has avoided the generation of safety misadventure.
For solving the problems of the technologies described above, the utility model provides the fixedly luffing control system of auxiliary of a kind of hoisting crane, comprise oil sources, control cock and two oil cylinders that are set up in parallel, the first oil outlet of described control cock is communicated with the rodless cavity of two described oil cylinders, the second oil outlet is communicated with the rod chamber of two described oil cylinders respectively; The rodless cavity of two described oil cylinders connects pipeline connection by first, and the rod chamber of two described oil cylinders connects pipeline connection by second.
Preferably, the described first two ends that connect pipeline are communicated with the rodless cavity of two described oil cylinders by two explosion relief valves respectively, and the described second two ends that connect pipeline are communicated with the rod chamber of two described oil cylinders by two described explosion relief valves respectively.
Preferably, described explosion relief valve is the first 2/2-way change-over valve, and when primary importance, its first hydraulic fluid port, the second hydraulic fluid port are communicated with; When the second place, its first hydraulic fluid port, the second hydraulic fluid port disconnect; And two pressure control port is communicated with its first hydraulic fluid port, the second hydraulic fluid port respectively.
Preferably, described the first perforation pipeline, described second connects on pipeline and is all connected with pressure relay.
Preferably, described control cock is three position four-way directional control valve,
When primary importance, its oil-feed port is communicated with the first oil outlet, and its return opening is communicated with the second oil outlet;
When the second place, its oil-feed port and the first oil outlet, the second oil outlet all disconnect;
When the 3rd position, its oil-feed port is communicated with the second oil outlet, and its return opening is communicated with the first oil outlet.
Preferably, also comprise the second 2/2-way change-over valve being connected between described oil sources and described three position four-way directional control valve valve,
When described the second 2/2-way change-over valve is during in primary importance, described oil sources is communicated with the oil-feed port of described three position four-way directional control valve by described the second 2/2-way change-over valve;
When described the second 2/2-way change-over valve is during in the second place, its oil inlet and its oil outlet disconnect.
Preferably, described three position four-way directional control valve and described the second 2/2-way change-over valve are electromagnetic valve.
Preferably, be also provided with check valve group between the return opening of described control cock and fuel tank, described check valve group comprises two check valves that are set up in parallel, and the circulating direction of two described check valves is contrary.
Preferably, the first oil outlet of described control cock is communicated with the rodless cavity of two described oil cylinders respectively by two balance cocks, and the second oil outlet of described control cock is communicated with the rod chamber of two described oil cylinders respectively by two described balance cocks.
Preferably, the hydraulic tubing of described luffing control system comprises at least one quick coupling and at least one reel, and described quick coupling and described reel interconnect.
The utility model provides the fixedly luffing control system of auxiliary of a kind of hoisting crane, and the rodless cavity of two oil cylinder connects pipeline connection by first, and the rod chamber of two oil cylinders connects pipeline connection by second.
Adopt this structure, in the working process of two oil cylinders, first connects pressure and the flow equalization that pipeline makes the rodless cavity of two oil cylinders, second connects pressure and the flow equalization that pipeline makes the rod chamber of two oil cylinders, thereby guarantee that two oil cylinders can be synchronized with the movement with the precision meeting design requirement, and avoid the generation of safety misadventure.
Accompanying drawing explanation
Fig. 1 is the fixing structural representation of the luffing device of auxiliary of hoisting crane in prior art;
Fig. 2 provides the hydraulic schematic diagram of luffing control system for the utility model;
Fig. 3 is the structural representation of the explosion relief valve in Fig. 2.
Wherein, the Reference numeral in Fig. 1 and the corresponding relation between component names are:
Support 1 ＇; Swivel mount 2 ＇; Oil cylinder 3 ＇;
Reference numeral and the corresponding relation between component names in Fig. 2 to Fig. 3 are:
Oil sources 1; Oil cylinder 2; First connects pipeline 21; Second connects pipeline 22;
The specific embodiment
Core of the present utility model is for providing a kind of luffing control system of fixedly auxiliary of hoisting crane, the rodless cavity of two oil cylinders of this control system is communicated with, the rodless cavity of two oil cylinders is communicated with, thereby avoided two oil cylinder synchronization actions, guaranteed the fixedly job security of auxiliary.
In order to make those skilled in the art understand better the technical solution of the utility model, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 2, Fig. 2 provides the hydraulic schematic diagram of luffing control system for the utility model.
In a kind of specific embodiment, as shown in Figure 2, the utility model provides the fixedly luffing control system of auxiliary of a kind of hoisting crane, comprise oil sources 1, control cock 3 and two oil cylinders that are set up in parallel 2, the oil-feed port P of this control cock 3 is communicated with oil sources 1, its oil return inlet T is communicated with fuel tank, and its first oil outlet A is communicated with the rodless cavity of two oil cylinders 2, the second oil outlet B is communicated with the rod chamber of two oil cylinders 2.The rodless cavity of two oil cylinders 2 connects pipeline 21 by first and is communicated with, and the rod chamber of two oil cylinders 2 connects pipeline 22 by second and is communicated with.
Adopt this structure, in the working process of two oil cylinders 2, first connects pressure and the flow equalization that pipeline 21 makes the rodless cavity of two oil cylinders 2, second connects pressure and the flow equalization that pipeline 22 makes the rod chamber of two oil cylinders 2, thereby guarantee that two oil cylinders 2 can be synchronized with the movement with the precision meeting design requirement, and avoid the generation of safety misadventure.
Further, in scheme, as shown in Figure 2, the above-mentioned first two ends that connect pipeline 21 are communicated with the rodless cavity of two oil cylinders 2 by two explosion relief valves 6 respectively, and the second two ends that connect pipeline 22 are also communicated with the rod chamber of two oil cylinders 2 by two explosion relief valves 6 respectively.
In concrete scheme, as shown in Figure 3, Fig. 3 is the structural representation of the explosion relief valve 6 in Fig. 2, and above-mentioned explosion relief valve 6 is the first 2/2-way change-over valve, and when primary importance, its first hydraulic fluid port, the second hydraulic fluid port are communicated with; When the second place, its first hydraulic fluid port, the second hydraulic fluid port disconnect; And two pressure control port is communicated with its first hydraulic fluid port, the second hydraulic fluid port respectively.
Adopt this structure, when oil cylinder 2 normal work, the first 2/2-way change-over valve is in the second place, now the first hydraulic fluid port P1 and the second hydraulic fluid port P2 mouth conducting, realize the perforation of two amplitude oil cylinder 2 corresponding epitrochoidal chambers, the pressure in balanced two chambeies, and make flow be tending towards balanced, guarantee the synchronization accuracy of two oil cylinders 2.Once first connects pipeline 21 or second, connect pipeline 22 generation explosions, the pressure of the first hydraulic fluid port P1 of the explosion relief valve 6 on this pipeline can be reduced to zero moment, now by the second hydraulic fluid port P2, bear load pressure, this pressure can overcome spring force, drive the oil circuit of valve core movement shutoff explosion relief valve 6 from the first hydraulic fluid port P1 to the second hydraulic fluid port P2, the first 2/2-way change-over valve switches to the first control position, the fluid in oil cylinder 2 can not be leaked by the pipeline of explosion, the generation of Accident prevention.
As can be seen here, adopt above-mentioned pressure controlled the first 2/2-way change-over valve as explosion relief valve 6, can guarantee to connect when explosion occurs pipeline 22 and avoid two fluid in oil cylinder 2 to leak by the first perforation pipeline 21 or the second perforation pipeline 22 at the first perforation pipeline 21 or second, further guarantee the safety of luffing control system.Can expect, above-mentioned explosion relief valve 6, not only for said structure, can also adopt other structures.
In the another kind of specific embodiment, above-mentioned the first perforation pipeline 21, second connects on pipeline 22 and is all connected with pressure relay 7.
Like this, two pressure relayes 7 can detect the first perforation pipeline 21, the second pressure that connects pipeline 22 respectively in real time, once first connects pipeline 21, second, connect pipeline 22 generation explosions, pressure relay 7 can react in time by the variation of its pressure, further guarantees the stability of luffing control system.
The specific constructive form of above-mentioned control cock 3 can also be further set.
In the another kind of specific embodiment, as shown in Figure 2, above-mentioned control cock 3 can be three position four-way directional control valve, and when primary importance, its oil-feed port P is communicated with the first oil outlet A, and its oil return inlet T is communicated with the second oil outlet B; When the second place, its oil-feed port P and the first oil outlet A, the second oil outlet B all disconnect; When the 3rd position, its oil-feed port P is communicated with the second oil outlet B, and its oil return inlet T is communicated with the first oil outlet A.
Adopt this structure, when control cock 3 is during in the second place, luffing control system is in off working state.When control cock 3 is during in primary importance, the fluid that oil sources 1 provides is filled with the rodless cavity of oil cylinder 2 through oil-feed port P, the first oil outlet A and hydraulic tubing, drive the piston rod of oil cylinder 2 to move to rod chamber, rod chamber inner fluid flows back to fuel tank through hydraulic tubing, the second oil outlet B and oil return inlet T.When control cock 3 is during in the 3rd position, the fluid that oil sources 1 provides is filled with the rod chamber of oil cylinder 2 through oil-feed port P, the second oil outlet B and hydraulic tubing, drive the piston rod of oil cylinder 2 to move to rodless cavity, rodless cavity inner fluid flows back to fuel tank through hydraulic tubing, the first oil outlet A and oil return inlet T.
As can be seen here, adopt above-mentioned three position four-way directional control valve as control cock 3, can realize the motion of two oil cylinder 2 different directions, and then realize hoisting or falling of fixing auxiliary.Certainly, above-mentioned control cock 3, not only for above-mentioned three position four-way directional control valve, can also be other structures.
Further in scheme, above-mentioned luffing control system can also comprise the second 2/2-way change-over valve 4 being connected between oil sources 1 and three position four-way directional control valve valve, when the second 2/2-way change-over valve 4 is during in primary importance, oil sources 1 is communicated with the oil-feed port P of three position four-way directional control valve by 2/2-way change-over valve; When the second 2/2-way change-over valve 4 is during in the second place, its oil inlet and its oil outlet disconnect.
Adopt this structure, can be by switching the control position of the second 2/2-way change-over valve 4, realize being communicated with or disconnection of oil sources 1 and three position four-way directional control valve, further play the effect of safe limit.
Above-mentioned three position four-way directional control valve and the second 2/2-way change-over valve 4 can be electromagnetic valve, by the switching electric, dead electricity realizes control position that obtains of its electromagnet.Certainly, above-mentioned three position four-way directional control valve, the second 2/2-way change-over valve 4, not only for automatically controlled form, can also adopt the form of hydraulic control.
In the another kind of specific embodiment, as shown in Figure 2, between the oil return inlet T of control cock 3 and fuel tank, be also provided with check valve group 5, check valve group 5 comprises two check valves that are set up in parallel, wherein the flow direction of the first check valve 51 is that the flow direction of 3, the second check valves 52 from fuel tank to control cock is from control cock 3 to fuel tank.
Adopt this structure, by the conducting pressure of the first check valve 51 and the second check valve 52 is set, fluid after can avoiding fixing auxiliary to hoist in pipeline is because fuel tank is flowed back in deadweight, can also avoid the fluid in fuel tank to enter control cock 3 inside, further guarantee the safety of luffing control system.
In the another kind of specific embodiment, the first oil outlet A of above-mentioned control cock 3 is communicated with the rodless cavity of two oil cylinders 2 respectively by two balance cocks 8, and the second oil outlet B of control cock 3 is communicated with the rod chamber of two oil cylinders 2 respectively by two balance cocks 8.
Adopt this structure, each balance cock 8 can guarantee that its two ends line pressure is stable, plays the effect of pressurize, prevents because fixed joint arm lengths causes oil cylinder 2 that uncontrollable telescopic variation occurs compared with the long chatter that produces, avoid fluid in oil cylinder 2 to external leakage, the generation of Accident prevention.
In the another kind of specific embodiment, the hydraulic tubing of above-mentioned luffing control system comprises at least one quick coupling 9 and at least one reel 10, and quick coupling 9 interconnects with reel 10.
Adopt this structure, the assembly and disassembly process of luffing control system is simple, convenient, is applicable to the fixed joint arm configuration of different length, has good practicality.
Above to a kind of hoisting crane provided by the utility model fixedly the luffing control system of auxiliary be described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. the fixing luffing control system of auxiliary of a hoisting crane, comprise oil sources (1), control cock (3) and two oil cylinders that are set up in parallel (2), the first oil outlet of described control cock (3) is communicated with the rodless cavity of two described oil cylinders (2) respectively, the second oil outlet is communicated with the rod chamber of two described oil cylinders (2) respectively; It is characterized in that, the rodless cavity of two described oil cylinders (2) connects pipeline (21) by first and is communicated with, and the rod chamber of two described oil cylinders (2) connects pipeline (22) by second and is communicated with.
2. the fixing luffing control system of auxiliary of hoisting crane according to claim 1, it is characterized in that, the described first two ends that connect pipeline (21) are communicated with the rodless cavity of two described oil cylinders (2) by two explosion relief valves (6) respectively, and the described second two ends that connect pipeline (22) are communicated with the rod chamber of two described oil cylinders (2) by two described explosion relief valves (6) respectively.
3. the fixing luffing control system of auxiliary of hoisting crane according to claim 2, is characterized in that, described explosion relief valve (6) is the first 2/2-way change-over valve, and when primary importance, its first hydraulic fluid port, the second hydraulic fluid port are communicated with; When the second place, its first hydraulic fluid port, the second hydraulic fluid port disconnect; And two pressure control port is communicated with its first hydraulic fluid port, the second hydraulic fluid port respectively.
4. the fixing luffing control system of auxiliary of hoisting crane according to claim 3, is characterized in that, described first connects pipeline (21), described second connects on pipeline (22) and be all connected with pressure relay (7).
5. according to the fixing luffing control system of auxiliary of the hoisting crane described in claim 1-4 any one, it is characterized in that, described control cock (3) is three position four-way directional control valve,
When primary importance, its oil-feed port is communicated with the first oil outlet, and its return opening is communicated with the second oil outlet;
When the second place, its oil-feed port and the first oil outlet, the second oil outlet all disconnect;
When the 3rd position, its oil-feed port is communicated with the second oil outlet, and its return opening is communicated with the first oil outlet.
6. the fixing luffing control system of auxiliary of hoisting crane according to claim 5, is characterized in that, also comprises the second 2/2-way change-over valve (4) being connected between described oil sources (1) and described three position four-way directional control valve valve,
When described the second 2/2-way change-over valve (4) is during in primary importance, described oil sources (1) is communicated with the oil-feed port of described three position four-way directional control valve by described the second 2/2-way change-over valve (4);
When described the second 2/2-way change-over valve (4) is during in the second place, its oil inlet and its oil outlet disconnect.
7. the fixing luffing control system of auxiliary of hoisting crane according to claim 6, is characterized in that, described three position four-way directional control valve and described the second 2/2-way change-over valve (4) are electromagnetic valve.
8. the fixing luffing control system of auxiliary of hoisting crane according to claim 6, it is characterized in that, between the return opening of described control cock (3) and fuel tank, be also provided with check valve group (5), described check valve group (5) comprises two check valves that are set up in parallel, and the circulating direction of two described check valves is contrary.
9. according to the fixing luffing control system of auxiliary of the hoisting crane described in claim 1-4 any one, it is characterized in that, the first oil outlet of described control cock (3) is communicated with the rodless cavity of two described oil cylinders (2) respectively by two balance cocks (8), and the second oil outlet of described control cock (3) is communicated with the rod chamber of two described oil cylinders (2) respectively by two described balance cocks (8).
10. according to the fixing luffing control system of auxiliary of the hoisting crane described in claim 1-4 any one, it is characterized in that, the hydraulic tubing of described luffing control system comprises at least one quick coupling (9) and at least one reel (10), and described quick coupling (9) interconnects with described reel (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609708.8U CN203529814U (en) | 2013-09-29 | 2013-09-29 | Variable amplitude control system for fixed fly jib of crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320609708.8U CN203529814U (en) | 2013-09-29 | 2013-09-29 | Variable amplitude control system for fixed fly jib of crane |
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| Publication Number | Publication Date |
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| CN203529814U true CN203529814U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320609708.8U Expired - Fee Related CN203529814U (en) | 2013-09-29 | 2013-09-29 | Variable amplitude control system for fixed fly jib of crane |
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| CN (1) | CN203529814U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071709A (en) * | 2014-07-18 | 2014-10-01 | 徐州重型机械有限公司 | Fixed fly jib stepless amplitude-variation control system for crane and crane |
| CN105179356A (en) * | 2015-08-27 | 2015-12-23 | 徐州重型机械有限公司 | Auxiliary boom control valve, auxiliary boom hydraulic control system and crane |
-
2013
- 2013-09-29 CN CN201320609708.8U patent/CN203529814U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104071709A (en) * | 2014-07-18 | 2014-10-01 | 徐州重型机械有限公司 | Fixed fly jib stepless amplitude-variation control system for crane and crane |
| CN105179356A (en) * | 2015-08-27 | 2015-12-23 | 徐州重型机械有限公司 | Auxiliary boom control valve, auxiliary boom hydraulic control system and crane |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20200929 |
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| CF01 | Termination of patent right due to non-payment of annual fee |