CN101734566B - Crane - Google Patents
Crane Download PDFInfo
- Publication number
- CN101734566B CN101734566B CN2008101775952A CN200810177595A CN101734566B CN 101734566 B CN101734566 B CN 101734566B CN 2008101775952 A CN2008101775952 A CN 2008101775952A CN 200810177595 A CN200810177595 A CN 200810177595A CN 101734566 B CN101734566 B CN 101734566B
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- China
- Prior art keywords
- spool
- plugging part
- hoisting crane
- balance cock
- additional channel
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Abstract
The invention discloses a crane comprising a balanced valve serially connected to a winch oil path. Control oil is acted on a valve core through a damping channel; the crane also comprises a plugging component synchronously moving along with the valve core, and an additional channel; the control oil can be acted on the valve core through the additional channel; and the additional channel is gradually plugged by the plugging component in the process of opening a throttling channel of the balanced valve. At the initial phase that the throttling valve is opened, the control oil is acted on the valve core through the additional channel, thus the response speed is high and the operation is basically not delayed. The additional channel is gradually plugged by the plugging component along with the movement of the valve core; at the time, the control oil can be acted on the valve mainly or completely through the damping channel, thereby effectively avoiding the jitter generated in the shift process of the valve core. The crane not only can effectively avoid the jitter generated in the falling process of heavy objects, but also can avoid the operation delay.
Description
Technical field
The present invention relates to technical field of engineering machinery, particularly relate to a kind of hoisting crane.
Background technology
Along with the continuous maturation of correlation technique in the engineering machinery field, the user no longer only is confined to lifting performance for the requirement of hoisting crane, comprises that some other performance of operating fine motion property just more and more receives user's attention.
In the process of hoisting heavy, good operation fine motion property can make operation process more steady, thereby helps improving operational security and comfort level; In the process that weight is transferred, operation fine motion property is particularly important.
During normal operation, hoisting crane utilizes the fluid motor-driven elevator to rotate, and through rolling or decontrol steel rope and realize that the lifting of its loads that hangs perhaps transfers.In order to ensure job safety, at the lifting side hydraulic fluid port of HM Hydraulic Motor, usually balance cock can be installed, comprise check valve and throttling passage in the balance cock.
In the time of need promoting weight, hydraulic oil is directly through balance cock in-to-in check valve, and without the throttling passage of balance cock, thereby avoids hydraulic fluid flow rate is limited, can be with maximum hydraulic pressure oil flow enhancement weight, increase work efficiency.
In the time of need transferring weight, consider the requirement of safe operation, must control the speed that weight falls effectively, the method that can take usually to limit hydraulic fluid flow rate comes the speed that weight falls is controlled.Therefore, can make the throttling passage of hydraulic oil through balance cock, thus the speed of the flow of modulated pressure oil, restriction weight whereabouts.
When transferring weight, want to let the throttling passage of hydraulic oil through balance cock, need to realize the transposition of balance cock spool; Usually can get control oil by self-hydraulic motor lifting side hydraulic fluid port, and the spool that promotes balance cock through this control oil replaces.
Shake easily in the transposition process of above-mentioned balance cock spool, shake opening speed and openings of sizes common and balance cock have substantial connection.If the balance cock opening speed is too fast, may causes the uncontrollable of falling speed, thereby bring huge potential safety hazard; The unexpected whereabouts of weight also can cause the vibration of whole hoisting crane.If the too small openings of balance cock; Be easy to that then balance cock is in and open the state that closes of neglecting suddenly; The flow of the hydraulic oil through balance cock is also suddenly big or suddenly small, and HM Hydraulic Motor is easy in this case produce and creeps, thereby brings intermittence or periodic shake to hoisting crane.
At present,, can make control oil, thereby avoid the too fast transposition of balance cock spool at first through the fixing damping hole of a circulation ability in order to alleviate the shake that is produced in the balance cock spool transposition process.If above-mentioned through hole is bigger than normal, then it is difficult to bring into play the effect that alleviates shake; Yet,, obviously will cause the delay of operation in the existence of the above-mentioned damping hole of starting stage of opening balance cock if above-mentioned damping hole is less than normal.It is different avoiding shaking with the operating delay of requirement avoid to(for) through hole, and in fact, existing balance cock is being avoided shaking and avoided the performance aspect two of the operating delaies all can not be satisfactory.
Therefore, how avoiding simultaneously shake effectively and avoid operating delay, is the present technical issues that need to address of those skilled in the art.
Summary of the invention
The purpose of this invention is to provide a kind of hoisting crane, can when effectively avoiding in the falling process of heavy shake taking place, avoid occurring the operating delay phenomenon.
For solving the problems of the technologies described above, the present invention provides a kind of hoisting crane, comprises the balance cock that is serially connected with in the elevator oil circuit, and control oil acts on the spool of said balance cock through the damp channel of said balance cock; Said hoisting crane further comprises the plugging part that is synchronized with the movement with said spool, and additional channel, and control oil can act on said spool through said additional channel; Open in the process of throttling passage of said balance cock at said spool, said plugging part is the said additional channel of shutoff gradually.
Preferably; The valve seat captive joint control font of said balance cock; Setting has the mounting pipe of central aisle among the oil pocket of said control font, and said plugging part is arranged in the said central aisle, and said additional channel comprises the through hole of the sidewall that runs through said mounting pipe; Open in the process of said throttling passage, said plugging part passes through the said through hole of shutoff gradually.
Preferably, said mounting pipe and said control font flexibly connect, so that can adjust said plugging part and the distance of said through hole on said valve core movement direction.
Preferably, said mounting pipe is threaded with said control font.
Preferably, said spool is connected with the push rod that is synchronized with the movement with it, and the end of said push rod is positioned among the said central aisle, and said plugging part fits in the end of said push rod under the effect of holddown spring.
Preferably, said spool is connected with the push rod that is synchronized with the movement with it, and the end of said push rod is positioned among the said central aisle, and said plugging part is fixedly connected on the end of said push rod.
Preferably, said plugging part is specially the shutoff steel ball.
Preferably, said hoisting crane is specially runabout crane.
Hoisting crane provided by the present invention, its balance cock comprise can be made control oil walk around damp channel and act on the additional channel of spool, and the plugging part that is synchronized with the movement with said spool.In the transposition process of said spool, the throttling passage of said balance cock is opened, and simultaneously, said spool drives said plugging part and is synchronized with the movement; In the process that said throttling passage is opened, said additional channel is by the shutoff gradually of said plugging part.Because in the starting stage that throttling passage is opened, control oil can pass through said additional channel and act on said spool, so speed of response is fast, there is not delay basically in operation.Along with moving of said spool, said plugging part is gradually with said additional channel shutoff; Control oil is used for said spool with mainly or fully just doing through damp channel this moment, therefore can effectively avoid the shake that is produced in the spool transposition process.In a word, hoisting crane provided by the present invention not only can effectively be avoided shaking in the falling process of heavy, and can avoid occurring the operating delay phenomenon.
A kind of preferred embodiment in, be provided with among the oil pocket of said control font and have the mounting pipe of central aisle, said plugging part is arranged in the said central aisle, said additional channel comprises the through hole of the sidewall that runs through said mounting pipe; Said mounting pipe and said control font flexibly connect, so that when said spool stop motion, can adjust the axial distance of said plugging part and said through hole.Therefore; Can adjust the axial distance of said plugging part and said through hole through the relative distance of adjusting said mounting pipe and said control font; Can make said additional channel perhaps delayed shutoff like this by shutoff in advance; Thereby can satisfy the requirement of different tonnage hoisting cranes, have higher adaptability.
Description of drawings
The schematic diagram of the hoisting crane that Fig. 1 is provided for a kind of specific embodiment of the present invention;
Fig. 2 is in the structural representation of closed condition for the present invention's balance cock that a kind of specific embodiment provides;
Fig. 3 is in the structural representation of initial opening state for the balance cock among Fig. 2;
Fig. 4 is in the structural representation of full open position for the balance cock among Fig. 2.
The specific embodiment
Core of the present invention provides a kind of hoisting crane, can when effectively avoiding in the falling process of heavy shake taking place, avoid occurring the operating delay phenomenon.
In order to make those skilled in the art person understand the present invention program better, the present invention is done further detailed description below in conjunction with the accompanying drawing and the specific embodiment.
Please refer to Fig. 1, the schematic diagram of the hoisting crane that Fig. 1 is provided for a kind of specific embodiment of the present invention.
When slinging weight 8, hydraulic oil pump 2 can pump the hydraulic oil in the fuel tank 1, and the position, a left side of change-over valve 3 is communicated with; Therefore hydraulic oil will be through the check valve of balance cock 5; And then getting into HM Hydraulic Motor 4, HM Hydraulic Motor 4 can drive elevator 7 rolling stay cords, thereby realizes the lifting of weight 8.
When transferring weight 8, change-over valve 3 switching-overs are so that its right position is communicated with, and hydraulic oil will directly get into HM Hydraulic Motor 4, so that HM Hydraulic Motor 4 drives elevator 7 backward rotation, thereby transfer weight.In the time of change-over valve 3 switching-overs, control oil can make the spool transposition of balance cock 5, thereby makes its throttling passage conducting.Hydraulic oil can be got back in the fuel tank 1 through the throttling passage and the change-over valve 3 of balance cock 5 through behind the HM Hydraulic Motor 4.The throttling passage of balance cock 5 can avoid weight to descend fast, thereby helps improving operational security.
The present invention has carried out bigger improvement to the structure of balance cock 5.
Please refer to Fig. 2 to Fig. 4, Fig. 2 is in the structural representation of closed condition for the present invention's balance cock that a kind of specific embodiment provides; Fig. 3 is in the structural representation of initial opening state for the balance cock among Fig. 2; Fig. 4 is in the structural representation of full open position for the balance cock among Fig. 2.
In a kind of specific embodiment, balance cock 5 provided by the present invention can be serially connected with in the elevator oil circuit of hoisting crane, and balance cock 5 comprises spool 51, can the throttling passage of balance cock 5 be opened through the transposition of spool 51 when hoisting crane is transferred weight.Spool 51 is arranged in the valve pocket in the valve seat 52.
The outside of valve seat 52 is installed with control font 53, and control font 53 can pass through bolted connection with valve seat 52, and both contact positions can be provided with seal ring, reveals to avoid controlling oil.
Can feed control oil to the inside of control font 53 through oil inlet 58.Have first chamber 531, second chamber 532 and 533, the first chambeies 531, the 3rd chamber in the internal cavity of control font 53 and be connected with second chamber 532, both communication passage can be damping holes, can certainly not be.Be communicated with through damp channel 535 between second chamber 532 and the 3rd chamber 533, the control oil that gets into by oil inlet 58 can be successively through first chamber 531, second chamber 532 and the 3rd chamber 533, finally act on the left side of spool 52.
Also has additional channel among the control font 53.In a kind of specific embodiment, can among the oil pocket of control font 53, mounting pipe 54 be set, mounting pipe 54 has central aisle.Above-mentioned first chamber 531, second chamber 532 and the 3rd chamber 533 can be separated by mounting pipe 54.Mounting pipe 54 keeps sealing with the matching part of control font 53.Offer through hole 534 on the sidewall of the central aisle of mounting pipe 54, through hole 534 can directly be communicated with first chamber 531 and the 3rd chamber 533.Said additional channel is the passage via first chamber 531, through hole 534 to the 3rd chambeies 533.Control oil can directly get in the 3rd chamber 533 from first chamber 531 through said additional channel, thereby gets around damp channel 535; Certainly, control oil also can get in the 3rd chamber 533 via said additional channel and damp channel 535 simultaneously.
The concrete generation type of said additional channel should not receive the restriction that epimere is described, and those skilled in the art needn't pay creative work and can realize through other modes.
Among the control font 53 plugging part 56 can also be set, plugging part 56 is synchronized with the movement with spool 52.According to the diagram specific embodiment, spool 52 moves right in the process of the throttling passage of opening balance cock, plugging part 56 thereby thereupon move right, and gradually with said additional channel shutoff." shutoff " comprises complete shutoff and part shutoff, and promptly plugging part 56 can be with the complete shutoff of said additional channel, also can be with its part shutoff.
Plugging part 56 specifically can be arranged in the central aisle of mounting pipe 54, and is positioned at the left side of through hole 534, has suitable distance between plugging part 56 and the through hole 534.The push rod 55 that is synchronized with the movement with spool 52 can be set, and the end of push rod 55 (left end among the figure) is arranged in the central aisle of mounting pipe 54.Plugging part 56 specifically can be shutoff steel ball or other structures.
Can be accomplished in several ways being synchronized with the movement of plugging part 56 and spool 52.For example, can plugging part 56 be fixedly connected on the end of push rod 55; Perhaps, also the holddown spring 57 that be compressive state can be set, thereby plugging part 56 is pressed to the end of push rod 55, so that the end of plugging part 56 and push rod 55 keeps the state that fits in the left side of plugging part 56.
In opening the process of said throttling passage, plugging part 56 moves with spool 52 to the right, gradually with through hole 534 shutoff, promptly gradually with said additional channel shutoff.The structure of other each several parts of hoisting crane provided by the present invention can be with reference to figure 1 and prior art, and this paper repeats no more.
Because in the starting stage that throttling passage is opened, shown in the dotted line of band arrow among Fig. 3, control oil can pass through said additional channel and act on spool 52, so speed of response is fast, there is not delay basically in operation.Along with moving of spool 52; Plugging part 56 is gradually with said additional channel shutoff; Shown in the dotted line of band arrow among Fig. 4, control oil will just can act on spool 52 through damp channel 535 this moment main or fully, therefore can effectively avoid the shake that is produced in the spool 52 transposition processes.In a word, hoisting crane provided by the present invention not only can effectively be avoided in falling process of heavy, shaking, and can avoid occurring the operating delay phenomenon.
Can further improve above-mentioned balance cock.
For example, can mounting pipe 54 be movably installed in the control font 53 through screw thread or other modes, its distance with respect to control font 53 on spool 52 sense of motions can be adjusted.Like this; When the adjustment of the position of mounting pipe 54; The position of through hole 534 on spool 52 sense of motions adjusted thereupon, also changes in the distance between through hole 534 and the plugging part 56 on spool 52 sense of motions thereupon, thereby can adjust said additional channel by the time of shutoff.
If mounting pipe 54 moves right with respect to control font 53; With enlarging through hole 534 and the distance of plugging part 56 on spool 52 sense of motions; Spool 52 need move right like this, and afterwards plugging part 56 can be with through hole 534 sealings for bigger distance; Be that damp channel 535 is delayed and played a role, be fit to the less hoisting crane of tonnage this moment.
On the contrary; If mounting pipe 54 is moved to the left with respect to control font 53; This will dwindle through hole 534 and the distance of plugging part 56 on spool 52 sense of motions; The distance back plugging part 56 that spool 52 moves right less can be with through hole 534 sealings, and promptly damp channel 535 plays a role in advance, is fit to the bigger hoisting crane of tonnage this moment.
Therefore; Can adjust the plugging part 56 and the axial distance of through hole 534 through the adjustment mounting pipe 54 and the relative distance of control font 53; Can make said additional channel perhaps delayed shutoff like this by shutoff in advance; Thereby can satisfy the requirement of different tonnage hoisting cranes, have higher adaptability.
In addition, hoisting crane provided by the present invention can be common various runabout cranes such as car hosit, rubber tired crane, crawler crane.
More than hoisting crane provided by the present invention has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (8)
1. a hoisting crane comprises the balance cock that is serially connected with in the elevator oil circuit, and control oil acts on the spool of said balance cock through the damp channel of said balance cock; It is characterized in that; Further comprise the plugging part that is synchronized with the movement with said spool, and additional channel, open in the process of throttling passage of said balance cock at said spool; In the starting stage that throttling passage is opened, control oil acts on said spool through said additional channel; Along with moving of said spool, said plugging part is the said additional channel of shutoff gradually, and control oil is main or act on said spool through said damp channel fully.
2. hoisting crane as claimed in claim 1; It is characterized in that; The valve seat captive joint control font of said balance cock; Setting has the mounting pipe of central aisle among the oil pocket of said control font, and said plugging part is arranged in the said central aisle, and said additional channel comprises the through hole of the sidewall that runs through said mounting pipe; Open in the process of said throttling passage, said plugging part is the said through hole of shutoff gradually.
3. hoisting crane as claimed in claim 2 is characterized in that, said mounting pipe and said control font flexibly connect, so that can adjust said plugging part and the distance of said through hole on said valve core movement direction.
4. hoisting crane as claimed in claim 3 is characterized in that, said mounting pipe is threaded with said control font.
5. hoisting crane as claimed in claim 3 is characterized in that said spool is connected with the push rod that is synchronized with the movement with it, and the end of said push rod is positioned among the said central aisle, and said plugging part fits in the end of said push rod under the effect of holddown spring.
6. hoisting crane as claimed in claim 3 is characterized in that said spool is connected with the push rod that is synchronized with the movement with it, and the end of said push rod is positioned among the said central aisle, and said plugging part is fixedly connected on the end of said push rod.
7. like each described hoisting crane of claim 1 to 6, it is characterized in that said plugging part is specially the shutoff steel ball.
8. hoisting crane as claimed in claim 7 is characterized in that, is specially runabout crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101775952A CN101734566B (en) | 2008-11-25 | 2008-11-25 | Crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101775952A CN101734566B (en) | 2008-11-25 | 2008-11-25 | Crane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101734566A CN101734566A (en) | 2010-06-16 |
| CN101734566B true CN101734566B (en) | 2012-01-04 |
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ID=42458693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101775952A Expired - Fee Related CN101734566B (en) | 2008-11-25 | 2008-11-25 | Crane |
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| Country | Link |
|---|---|
| CN (1) | CN101734566B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261354A (en) * | 2011-04-19 | 2011-11-30 | 徐州重型机械有限公司 | Crane hydraulic system and hydraulic balance valve thereof |
| CN109607400A (en) * | 2018-11-16 | 2019-04-12 | 中汽商用汽车有限公司(杭州) | A kind of dedicated lifting mechanism of energy transmission communication signal |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3710863A1 (en) * | 1987-04-01 | 1988-10-20 | Bosch Gmbh Robert | Hydraulic, releasable non-return valve |
| CN2069941U (en) * | 1990-07-13 | 1991-01-23 | 张忠斌 | Vibration-proof backpressure valve |
| CN2804450Y (en) * | 2005-06-01 | 2006-08-09 | 刘恒海 | Balancing valve |
| CN200999772Y (en) * | 2007-04-30 | 2008-01-02 | 江苏鼎晟液压有限公司 | Double-beat drop valve |
| CN201321357Y (en) * | 2008-11-25 | 2009-10-07 | 徐州重型机械有限公司 | Crane |
-
2008
- 2008-11-25 CN CN2008101775952A patent/CN101734566B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3710863A1 (en) * | 1987-04-01 | 1988-10-20 | Bosch Gmbh Robert | Hydraulic, releasable non-return valve |
| CN2069941U (en) * | 1990-07-13 | 1991-01-23 | 张忠斌 | Vibration-proof backpressure valve |
| CN2804450Y (en) * | 2005-06-01 | 2006-08-09 | 刘恒海 | Balancing valve |
| CN200999772Y (en) * | 2007-04-30 | 2008-01-02 | 江苏鼎晟液压有限公司 | Double-beat drop valve |
| CN201321357Y (en) * | 2008-11-25 | 2009-10-07 | 徐州重型机械有限公司 | Crane |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平11-246181A 1999.09.14 |
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| Publication number | Publication date |
|---|---|
| CN101734566A (en) | 2010-06-16 |
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Granted publication date: 20120104 Termination date: 20191125 |