CN110980528A - Novel single-cylinder plug pin type telescopic system and control method - Google Patents
Novel single-cylinder plug pin type telescopic system and control method Download PDFInfo
- Publication number
- CN110980528A CN110980528A CN201911132534.9A CN201911132534A CN110980528A CN 110980528 A CN110980528 A CN 110980528A CN 201911132534 A CN201911132534 A CN 201911132534A CN 110980528 A CN110980528 A CN 110980528A
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- Prior art keywords
- oil
- valve
- telescopic
- cylinder
- balance valve
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
- B66C13/20—Control systems or devices for non-electric drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/01—Locking-valves or other detent i.e. load-holding devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B2013/0448—Actuation by solenoid and permanent magnet
Abstract
The invention discloses a novel single-cylinder bolt type telescopic system which is characterized by comprising an oil way integrated block and a telescopic balance valve group; the oil circuit manifold block is arranged at the cylinder head of the hydraulic cylinder, and the telescopic balance valve group is arranged at the side part of the oil circuit manifold block; a novel single-cylinder bolt type telescopic control method; by adopting a new arrangement mode and a new control mode, the problems that an oil circuit manifold block of the crane cannot be reduced due to the limitation of a telescopic balance valve and a system back pressure high telescopic balance valve cannot be completely closed can be thoroughly solved; in addition, the novel design method has simple structure, and all the problems can be solved by arranging the telescopic balance valve at the lower side and adding the electromagnetic directional valve.
Description
Technical Field
The invention relates to a novel single-cylinder bolt type telescopic system and a control method, and belongs to the technical field of crane telescopic systems.
Background
At present, two methods are mainly adopted for a crane telescopic system: 1. the double-cylinder rope row mode is characterized in that a first-stage cylinder is arranged on a basic arm and drives a second-section arm to stretch, a second-stage cylinder is arranged on the second-section arm and drives a third-fourth-fifth-section arm to stretch, the cost is low, and the double-cylinder rope row mode is only suitable for a five-section arm stretching mechanism; 2. the single cylinder bolt mode, the hydro-cylinder is installed on basic arm, realizes the reciprocating motion of every section davit through the reciprocating motion of hydro-cylinder, and is with high costs, but application scope is wide.
With the increasing demands of users on the lifting capacity of cranes and the increasing maturity of crane technology, the high performance and light weight of cranes have become the trend of future development. In the conventional double-cylinder rope row and single-cylinder bolt telescopic system, the respective telescopic balance valves are arranged in the oil circuit integrated block, so that the volume of the oil circuit integrated block at the cylinder head cannot be reduced, and the problem of large space at the tail of a boom is caused; in addition, the oil inlet modes of the two telescopic balance valve control ports are directly taken from an oil return pipeline of the hydraulic cylinder, and the problem that the telescopic balance valve cannot be completely closed easily occurs when the back pressure is high.
The invention has the beneficial effects that: by adopting a new arrangement mode and a new control mode, the problems that an oil circuit manifold block of the crane cannot be reduced due to the limitation of a telescopic balance valve and a system back pressure high telescopic balance valve cannot be completely closed can be thoroughly solved; in addition, the novel design method has simple structure, and all the problems can be solved by arranging the telescopic balance valve at the lower side and adding the electromagnetic directional valve.
Disclosure of Invention
The invention aims to provide a novel single-cylinder bolt type telescopic system and a control method, and aims to overcome the defect that an oil circuit integrated block cannot be reduced due to the limitation of a telescopic balance valve in the prior art.
A novel single-cylinder bolt type telescopic system comprises an oil way manifold block and a telescopic balance valve group; the oil circuit manifold block is arranged at the cylinder head of the hydraulic cylinder, and the telescopic balance valve group is arranged at the side part of the oil circuit manifold block.
Preferably, the telescopic balance valve group comprises an electromagnetic valve, a balance valve, a T oil port and a P oil port; the hydraulic control valve comprises a P oil port, a T oil port, a hydraulic cylinder small cavity, an electromagnetic valve, a balance valve, a P oil port, a hydraulic cylinder large cavity, a hydraulic control check valve, a hydraulic cylinder small cavity, an X oil port, an X1 oil port and a left position of the electromagnetic valve, wherein the P oil port is connected with the right position of the balance valve, the right position of the balance valve is connected with the hydraulic cylinder large cavity, the T oil port is connected with the hydraulic control check valve.
Preferably, the P oil port is connected with a hydraulic control one-way valve of the T oil port.
Preferably, the right position of the balance valve is connected with a large cavity of the hydraulic cylinder through damping.
Preferably, the X1 oil port is connected with a damping valve and a one-way valve in sequence and is connected with the P oil port.
Preferably, a filter screen and a damper are sequentially arranged between the left position of the electromagnetic valve and the X oil port from bottom to top.
A novel single-cylinder bolt type telescopic control method comprises the following steps:
when the electromagnetic valve is not electrified:
high-pressure oil output by the hydraulic pump passes through the balance valve from the oil port P to the large cavity of the hydraulic cylinder, and the hydraulic cylinder stretches; at the moment, hydraulic oil in the small cavity of the hydraulic cylinder flows to the oil tank from the X oil port;
when the electromagnetic valve is electrified:
high-pressure oil output by the hydraulic pump enters a small cavity of the hydraulic cylinder through the T port, meanwhile, the telescopic balance valve is pushed to change the direction through the X port, low-pressure oil in the large cavity flows back to the multi-way valve through the left position of the telescopic balance valve, and the hydraulic cylinder contracts.
Preferably, the method further comprises:
when the telescopic oil cylinder stops moving and the electromagnetic valve Y1 is not powered on, the control port X of the telescopic balance valve is communicated with the oil tank, the telescopic balance valve is closed and is not influenced by back pressure of an oil return path, and after the cargo boom stops completely, the telescopic balance valve automatically locks the hydraulic cylinder through the check valve at the right position.
Compared with the prior art, the invention has the following beneficial effects:
1. the novel layout mode can reduce the volume of the oil circuit manifold block, so that the problem of large space at the tail of the arm can be thoroughly solved, in addition, the telescopic balance valve is not limited by the volume of the oil circuit manifold block any more, the reliability of the telescopic balance valve can be improved by increasing a valve sleeve and the like, and the problem of large internal leakage is solved;
2. when the telescopic oil cylinder stops moving, the control port X of the telescopic balance valve is communicated with the oil tank through the electromagnetic directional valve, so that the problem that the high-back-pressure telescopic balance valve cannot be completely closed can be thoroughly solved.
Drawings
FIG. 1 is a novel arrangement of a telescopic balance valve;
FIG. 2 is a schematic diagram of a telescoping system control system;
FIG. 3 is a schematic view of a telescoping equalization valve disposed above an oil manifold;
FIG. 4 is a detailed schematic diagram of a mechanical two-position three-way directional valve instead of an electromagnetic directional valve;
fig. 5 is a specific schematic diagram of a hydraulic control two-position three-way reversing valve instead of an electromagnetic reversing valve.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
A novel single-cylinder bolt type telescopic system comprises an oil way manifold block 1 and a telescopic balance valve group 2; the oil circuit manifold block 1 is arranged at the cylinder head of the hydraulic cylinder, the telescopic balance valve group 2 is arranged at the side part of the oil circuit manifold block 1 and is arranged at the bottom of the oil circuit manifold block 1 as shown in a front view of fig. 1 or at the top of the oil circuit manifold block 1 as shown in fig. 3, and the layout can reduce the volume of the oil circuit manifold block 1, so that the problem of large tail space of the arm can be thoroughly solved.
In order to solve the problem that the telescopic balance valve is not limited by the volume of the oil circuit manifold block any more in the present example, the telescopic balance valve group 2 comprises an electromagnetic valve 3, a balance valve 4, a T oil port and a P oil port; the P oil port is connected with the right position of the balance valve 4, the right position of the balance valve 4 is connected with the large cavity of the hydraulic cylinder, the T oil port is connected with the hydraulic control one-way valve 7, the hydraulic control one-way valve 7 is connected with the small cavity of the hydraulic cylinder, the control oil port X1 oil port on the left position of the electromagnetic valve 3 is connected with the left position of the balance valve 4, the X oil port is connected with the T oil port, and the on-off of the X oil port and the X1 oil port is controlled by the electromagnetic valve 3; when the telescopic oil cylinder stops moving, the control port X of the telescopic balance valve is communicated with the oil tank through the electromagnetic directional valve, so that the problem that the back pressure high balance valve 4 cannot be completely closed is thoroughly solved; the hydraulic control check valve 7 of the T oil port is connected with the P oil port, when the high-pressure oil pump flows high-pressure oil to the large cavity of the hydraulic cylinder, one part of the P oil port flows to the hydraulic control check valve 7 to open the T oil port, so that low-pressure oil in the small cavity of the hydraulic cylinder flows to the multi-way valve, and when high-pressure oil does not flow into the large cavity, the hydraulic control check valve 7 prevents the low-pressure oil in the small cavity from flowing to the multi-way valve from the T oil port.
The right position of the balance valve 4 is connected with a large cavity of the hydraulic cylinder through a damper 5, and when the oil cylinder stands still, the right position of the balance valve 4 works through oil in the large cavity to lock the oil cylinder; balance valve control mouth X, balance valve control mouth X has connected gradually damping, check valve and is connected with the P hydraulic fluid port, makes the unnecessary high-pressure oil that the T hydraulic fluid port was come get back to the P hydraulic fluid port, still be equipped with filter screen and damping from up in proper order down between solenoid valve left side position and the X hydraulic fluid port, communicate with each other flexible balance valve control mouth X and oil tank through the solenoid directional valve, just so can thoroughly solve the problem that the high flexible balance valve of backpressure can' T close completely.
A novel single-cylinder bolt type telescopic control method comprises the following steps:
when the solenoid valve 3 is not energized:
high-pressure oil output by the hydraulic pump passes through the balance valve 4 from the oil port P to the large cavity of the hydraulic cylinder, and the hydraulic cylinder stretches; meanwhile, a hydraulic control one-way valve 7 on the T oil port is opened, and hydraulic oil in the small cavity of the hydraulic cylinder flows to the oil tank from the X oil port at the moment;
when the electromagnetic valve is electrified:
high-pressure oil output by the hydraulic pump enters a small cavity of the hydraulic cylinder through the T port, meanwhile, the balance valve 4 is pushed to reverse through the X1 oil port, low-pressure oil in the large cavity flows back to the multi-way valve through the left position of the balance valve 4, the hydraulic cylinder contracts, the high-pressure oil flows back to the balance valve 4 through the left position of the solenoid valve 3, the control oil port X oil port, the damper 5 and the hydraulic control one-way valve 7 from the T oil port, and at the moment, the low-pressure oil in the large cavity flows back to the multi-way valve through the left position of the balance valve.
The method further comprises the following steps: when the telescopic oil cylinder stops moving, when the electromagnetic valve 3 is not powered on, the control port X oil port of the electromagnetic valve 3 is communicated with the oil tank, the balance valve 4 is closed and is not influenced by back pressure of an oil return path, and after the crane boom stops completely, the balance valve 4 automatically locks the hydraulic cylinder through the check valve at the right position.
In this embodiment, a schematic diagram of a mechanical two-position three-way reversing valve or a hydraulic control two-position three-way reversing valve instead of a solenoid valve for control is shown in fig. 4 and 5, and both the on-off of X1 and X are controlled, which belongs to the conventional technical means in the art and is not described herein in too much detail.
The principle of the invention is as follows: the principle schematic diagram of the control system of the telescopic system is shown in fig. 2, hydraulic oil output by a hydraulic pump enters a P port through a multi-way valve, high-pressure oil enters a large cavity of a hydraulic cylinder through the right position of a balance valve 4, low-pressure oil flows back to the multi-way valve through a T oil port of a small cavity, the hydraulic cylinder extends, when an extending arm stops, the balance valve 4 can be completely closed even if the back pressure of the T oil port is high, and the back pressure does not affect the closing of the telescopic balance valve because an electromagnetic valve 3 is not powered at the moment, the left position enters the work, and the X1 port directly returns to; when the reversing valve 4 is reversed, the electromagnetic valve 3 is electrified, the right position enters the work, high-pressure oil output by the hydraulic pump enters the small cavity of the hydraulic cylinder through the T port, the balance valve 4 is pushed to reverse through the X1 oil port, low-pressure oil in the large cavity flows back to the multi-way valve through the left position of the balance valve 4, and the hydraulic cylinder contracts.
When the telescopic oil cylinder stops moving, the electromagnetic valve 3 is not powered, the control port X oil port of the electromagnetic valve 3 is communicated with the oil tank, the back pressure of an oil return path cannot influence the closing of the balance valve 4, and the balance valve 4 automatically locks the hydraulic cylinder through the check valve on the right position after the crane boom completely stops.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A novel single-cylinder bolt type telescopic system is characterized by comprising an oil way integrated block and a telescopic balance valve group; the oil circuit manifold block is arranged at the cylinder head of the hydraulic cylinder, and the telescopic balance valve group is arranged at the side part of the oil circuit manifold block.
2. The novel single cylinder bolt type telescopic system according to claim 1, wherein the telescopic balance valve set comprises an electromagnetic valve, a balance valve, a T oil port and a P oil port; the hydraulic control valve comprises a P oil port, a T oil port, a hydraulic cylinder small cavity, an electromagnetic valve, a balance valve, a P oil port, a hydraulic cylinder large cavity, a hydraulic control check valve, a hydraulic cylinder small cavity, an X oil port, an X1 oil port and a left position of the electromagnetic valve, wherein the P oil port is connected with the right position of the balance valve, the right position of the balance valve is connected with the hydraulic cylinder large cavity, the T oil port is connected with the hydraulic control check valve.
3. The novel single cylinder bolt type telescopic system of claim 2, wherein the P oil port is connected with a hydraulic control one-way valve of a T oil port.
4. The new single cylinder bolt type telescopic system according to claim 2, characterized in that the right position of the balancing valve is connected with the large cavity of the hydraulic cylinder through damping.
5. The novel single cylinder bolt type telescopic system according to claim 2, wherein the X1 oil port is connected with a damping valve and a check valve in sequence and is connected with a P oil port.
6. The novel single-cylinder bolt type telescopic system according to claim 5, wherein a filter screen and a damper are further arranged between the left position of the electromagnetic valve and the oil port of the X-shaped oil cylinder from bottom to top in sequence.
7. A novel single-cylinder bolt type telescopic control method is characterized by comprising the following steps:
when the electromagnetic valve is not electrified:
high-pressure oil output by the hydraulic pump passes through the balance valve from the oil port P to the large cavity of the hydraulic cylinder, and the hydraulic cylinder stretches; at the moment, hydraulic oil in the small cavity of the hydraulic cylinder flows to the oil tank from the X oil port;
when the electromagnetic valve is electrified:
high-pressure oil output by the hydraulic pump enters a small cavity of the hydraulic cylinder through the T port, meanwhile, the telescopic balance valve is pushed to change the direction through the X port, low-pressure oil in the large cavity flows back to the multi-way valve through the left position of the telescopic balance valve, and the hydraulic cylinder contracts.
8. The new single cylinder bolt extension and retraction system according to claim 7, wherein said method further comprises:
when the telescopic oil cylinder stops moving and the electromagnetic valve Y1 is not powered on, the control port X of the telescopic balance valve is communicated with the oil tank, the telescopic balance valve is closed and is not influenced by back pressure of an oil return path, and after the cargo boom stops completely, the telescopic balance valve automatically locks the hydraulic cylinder through the check valve at the right position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132534.9A CN110980528A (en) | 2019-11-19 | 2019-11-19 | Novel single-cylinder plug pin type telescopic system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911132534.9A CN110980528A (en) | 2019-11-19 | 2019-11-19 | Novel single-cylinder plug pin type telescopic system and control method |
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| CN110980528A true CN110980528A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911132534.9A Pending CN110980528A (en) | 2019-11-19 | 2019-11-19 | Novel single-cylinder plug pin type telescopic system and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396390A (en) * | 2020-04-29 | 2020-07-10 | 徐州徐工随车起重机有限公司 | Balance valve group suitable for stability control of overhead working truck |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371799A (en) * | 1967-03-01 | 1968-03-05 | Baldwin Lima Hamilton Corp | Telescopic boom angle control system |
| GB1356517A (en) * | 1971-09-07 | 1974-06-12 | Ruston Bucyrus Ltd | Light weight telescoping boom |
| CN2723414Y (en) * | 2004-08-27 | 2005-09-07 | 蚌埠市振冲安利工程机械有限公司 | Truck crane suspension arm |
| CN201818571U (en) * | 2010-09-27 | 2011-05-04 | 武桥重工集团股份有限公司 | Hydraulic system controlling two oil cylinders to sequentially telescope |
| CN202170138U (en) * | 2011-07-13 | 2012-03-21 | 淮安信息职业技术学院 | Tension device of full-hydraulic tape machine |
| CN102602826A (en) * | 2012-03-24 | 2012-07-25 | 三一汽车起重机械有限公司 | Crane and a hydraulic control system of single-cylinder telescopic mechanism thereof |
| CN104591012A (en) * | 2014-12-29 | 2015-05-06 | 三一汽车起重机械有限公司 | Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery |
| CN104692266A (en) * | 2015-02-05 | 2015-06-10 | 三一汽车起重机械有限公司 | Hydraulic system for telescopic buffer of crane boom and crane |
-
2019
- 2019-11-19 CN CN201911132534.9A patent/CN110980528A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3371799A (en) * | 1967-03-01 | 1968-03-05 | Baldwin Lima Hamilton Corp | Telescopic boom angle control system |
| GB1356517A (en) * | 1971-09-07 | 1974-06-12 | Ruston Bucyrus Ltd | Light weight telescoping boom |
| CN2723414Y (en) * | 2004-08-27 | 2005-09-07 | 蚌埠市振冲安利工程机械有限公司 | Truck crane suspension arm |
| CN201818571U (en) * | 2010-09-27 | 2011-05-04 | 武桥重工集团股份有限公司 | Hydraulic system controlling two oil cylinders to sequentially telescope |
| CN202170138U (en) * | 2011-07-13 | 2012-03-21 | 淮安信息职业技术学院 | Tension device of full-hydraulic tape machine |
| CN102602826A (en) * | 2012-03-24 | 2012-07-25 | 三一汽车起重机械有限公司 | Crane and a hydraulic control system of single-cylinder telescopic mechanism thereof |
| CN104591012A (en) * | 2014-12-29 | 2015-05-06 | 三一汽车起重机械有限公司 | Hydraulic control system for single cylinder pin type telescopic boom and engineering machinery |
| CN104692266A (en) * | 2015-02-05 | 2015-06-10 | 三一汽车起重机械有限公司 | Hydraulic system for telescopic buffer of crane boom and crane |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396390A (en) * | 2020-04-29 | 2020-07-10 | 徐州徐工随车起重机有限公司 | Balance valve group suitable for stability control of overhead working truck |
| CN111396390B (en) * | 2020-04-29 | 2021-05-18 | 徐州徐工随车起重机有限公司 | Balance valve group suitable for stability control of overhead working truck |
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Application publication date: 20200410 |
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