CN220319974U - Double-cylinder synchronous jacking system of emergency double-pump set - Google Patents
Double-cylinder synchronous jacking system of emergency double-pump set Download PDFInfo
- Publication number
- CN220319974U CN220319974U CN202321771732.1U CN202321771732U CN220319974U CN 220319974 U CN220319974 U CN 220319974U CN 202321771732 U CN202321771732 U CN 202321771732U CN 220319974 U CN220319974 U CN 220319974U
- Authority
- CN
- China
- Prior art keywords
- hydraulic
- double
- valve
- oil
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 238000006073 displacement reaction Methods 0.000 claims description 35
- 238000001514 detection method Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model belongs to the field of hydraulic systems, and particularly relates to an emergency double-pump double-cylinder synchronous jacking system, which comprises two hydraulic control units, wherein the two hydraulic control units respectively control a jacking hydraulic cylinder matched with the two hydraulic control units; a stop valve is arranged between the oil outlets of the hydraulic pumps of the two hydraulic control units; the hydraulic control unit also comprises a one-way valve, and an oil outlet of the one-way valve is respectively connected with an oil inlet of the manual reversing valve and an oil port of the stop valve. When the motor or the hydraulic pump in one loop is damaged and cannot operate, the stop valve can be opened, and the two hydraulic cylinders share the other motor pump group at the moment, so that the hydraulic pump can continue to operate at a reduced speed.
Description
Technical Field
The utility model belongs to the field of hydraulic systems, and particularly relates to an emergency double-pump set double-cylinder synchronous jacking system.
Background
In a double-cylinder jacking hydraulic system of the double-flat-arm type derrick crane, two hydraulic cylinders are arranged on two sides of a derrick frame, and compared with the situation that the two general hydraulic cylinders are arranged on the same side, the double-cylinder jacking hydraulic system is relatively poor in rigidity and greatly affected by unbalanced load, and a double-cylinder synchronous jacking control loop driven by a constant displacement pump is generally adopted in the industry. The two constant displacement pumps have volumetric efficiency errors, and the errors are further increased due to abrasion and unbalanced load working conditions in the use process, so that the synchronism of the two hydraulic cylinders is affected to a certain extent.
In the fault feedback of the elements of the hydraulic system of the tower crane, the fault feedback of the motor and the plunger pump takes up relatively more space. The damage of the motor and the plunger pump can directly lead to the stop of the hydraulic system, so that the tower crane hovers in the high air and cannot act in dangerous situations. For example, chinese patent with the publication number of CN204752022U discloses an electric pole double-cylinder hydraulic jacking system, which comprises two oil ways for jacking, wherein each oil way is provided with an oil filter, a plunger pump with a motor, a combination valve and a hydraulic control valve which are sequentially connected with an oil tank, and the jacking cylinder is further connected with an oil return tank through the combination valve; the oil way of the combination valve connected with the oil return tank is provided with a pressure gauge; the jacking cylinder is also provided with a stroke sensor which is connected with a stroke display; two pressure gauges and two travel displays in the two oil ways are arranged in a box body at the top of the pump station. The operating personnel can detect the strokes and working pressures of the two oil cylinders in real time, and adjust the hydraulic reversing valve at any time, so that the phenomenon that the stroke difference between the two sides is too large is avoided.
The technical scheme of the Chinese patent has the following defects: 1. the plunger pump adopted by the double-cylinder hydraulic jacking system is a constant delivery pump, the pump displacement is not adjustable, the double-cylinder synchronization precision is controlled completely by the observation of an operator and the opening degree of an operation reversing valve, the difference of the volumetric efficiency of the two plunger pumps, the machining error of the two hydraulic cylinders, the precision error of a hydraulic control valve and the like are difficult to eliminate or compensate, and the more the errors accumulate along with the abrasion of using elements of the hydraulic system, the synchronization precision is greatly affected. 2. As can be seen from the full description and the patent drawings, if the motor or the plunger pump in one hydraulic cylinder loop is damaged and cannot operate, the other loop also has to be stopped, otherwise, the tower crane is deflected by the top; and the shutdown can cause the tower crane to hover in high altitude, thereby increasing the danger.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model provides an emergency double-pump double-cylinder synchronous jacking system, wherein hydraulic pumps of two hydraulic control units are manual variable pumps, the displacement is adjustable, and then the running speeds of the two hydraulic cylinders are adjusted, so that speed difference caused by processing size errors of the two hydraulic cylinders, precision errors of hydraulic control valves and volumetric efficiency errors of the pumps is compensated; a stop valve is designed between the outlets of the two hydraulic pumps, and is in a closed state in general, so that the basic loops of the two hydraulic cylinders are independent, when a motor or a hydraulic pump in one loop is damaged and cannot operate, the stop valve can be opened, at the moment, the two hydraulic cylinders share the other motor pump group, the two hydraulic cylinders can continue to work under the condition of deceleration, the risk of suspending a tower crane from high altitude caused by shutdown is avoided, an emergency function is realized, and the reliability and maintainability of a hydraulic system are improved.
The utility model is realized by the following technical scheme: the emergency double-pump double-cylinder synchronous jacking system comprises two hydraulic control units, wherein the two hydraulic control units respectively control a jacking hydraulic cylinder matched with the two hydraulic control units, the hydraulic control units comprise a hydraulic pump connected with an oil tank, the hydraulic pump is driven by a motor, an oil outlet of the hydraulic pump is connected with an oil inlet of a manual reversing valve, a first working oil port of the manual reversing valve is connected with a rod cavity of the jacking hydraulic cylinder, and a second working oil port of the manual reversing valve is connected with a rodless cavity of the jacking hydraulic cylinder; the jacking hydraulic cylinder is provided with a stroke detection device; a stop valve is arranged between the oil outlets of the hydraulic pumps of the two hydraulic control units;
the hydraulic control unit further comprises a one-way valve, an oil inlet of the one-way valve is connected with an oil outlet of the hydraulic pump, and an oil outlet of the one-way valve is respectively connected with an oil inlet of the manual reversing valve and an oil port of the stop valve.
In some embodiments, the hydraulic pump of the hydraulic control unit is a variable displacement pump.
In some embodiments, the stroke detection device comprises a stay cord displacement sensor arranged on the jacking hydraulic cylinder, and the stay cord displacement sensor is in signal connection with the displacement digital display meter.
In some embodiments, a double one-way throttle valve is installed between the manual reversing valve and the jacking hydraulic cylinder; one-way throttle valve of the double-way throttle valve is connected between a first working oil port of the manual reversing valve and a rod cavity of the jacking hydraulic cylinder, and the other one-way throttle valve of the double-way throttle valve is connected between a second working oil port of the manual reversing valve and a rodless cavity of the jacking hydraulic cylinder.
In some embodiments, a balance valve is arranged between the second working oil port of the manual reversing valve and the rodless cavity of the jacking hydraulic cylinder, and a control port of the balance valve is connected with the rod cavity of the jacking hydraulic cylinder.
In some embodiments, an overflow valve is arranged between an oil inlet of the manual reversing valve and an oil return port of the manual reversing valve.
In some embodiments, a pressure gauge is further connected to the oil inlet of the manual directional valve.
In some embodiments, the oil return ports of the manual reversing valves of the two hydraulic control units are connected in parallel and then connected with the oil inlet of the oil return filter, and the oil return port of the oil return filter is connected with the oil tank.
The beneficial effects of the utility model are as follows: each jacking hydraulic cylinder is driven by an independent motor pump set and operated by an independent manual reversing valve; the hydraulic pumps of the two hydraulic control units are manual variable pumps, the displacement is adjustable, and then the running speeds of the two hydraulic cylinders are adjusted, so that speed differences caused by processing size errors of the two hydraulic cylinders, precision errors of the hydraulic control valves and volumetric efficiency errors of the pumps are compensated; a stop valve is designed between the outlets of the two hydraulic pumps, and is in a closed state in general, so that the basic loops of the two hydraulic cylinders are independent, when a motor or a hydraulic pump in one loop is damaged and cannot operate, the stop valve can be opened, at the moment, the two hydraulic cylinders share the other motor pump group, the two hydraulic cylinders can continue to work under the condition of deceleration, the risk of suspending a tower crane from high altitude caused by shutdown is avoided, an emergency function is realized, and the reliability and maintainability of a hydraulic system are improved.
Drawings
FIG. 1 is a hydraulic schematic of the present utility model;
in the figure, 1, an oil tank, 2.1, a first motor, 2.2, a second motor, 3.1, a first hydraulic pump, 3.2, a second hydraulic pump, 4.1, a first check valve, 4.2, a second check valve, 5.1, a first pressure gauge, 5.2, a second pressure gauge, 6.1, a first overflow valve, 6.2, a second overflow valve, 7.1, a first manual reversing valve, 7.2, a second manual reversing valve, 8.1, a first double check throttle valve, 8.2, a second double check throttle valve, 9.1, a first hose, 9.2, a second hose, 10.1, a first balance valve, 10.2, a second balance valve, 11.1, a first jack-up hydraulic cylinder, 11.2, a second jack-up hydraulic cylinder, 12.1, a first pull-rope displacement sensor, 12.2, a second pull-rope displacement sensor, 13.1, a first displacement digital display meter, 13.2, a second display device, 14, a stop valve and a stop valve are arranged.
Description of the embodiments
The utility model is further described below with reference to the drawings and examples.
As shown in fig. 1, the emergency double-pump double-cylinder synchronous jacking system comprises two hydraulic control units, wherein one of the two hydraulic control units is used for providing operation control for a first jacking hydraulic cylinder 11.1, and the hydraulic control unit used for controlling the first jacking hydraulic cylinder 11.1 comprises a first motor 2.1, a first hydraulic pump 3.1 and a first manual reversing valve 7.1; the other of the two hydraulic control units is for providing a working control for the second lifting hydraulic cylinder 11.2, the hydraulic control unit for controlling the second lifting hydraulic cylinder 11.2 comprising a second electric motor 2.2, a second hydraulic pump 3.2 and a second manual reversing valve 7.2. The first motor 2.1 is used for driving the first hydraulic pump 3.1, an oil inlet of the first hydraulic pump 3.1 is connected with the oil tank 1, an oil outlet of the first hydraulic pump 3.1 is connected with an oil inlet of the first manual reversing valve 7.1, a first working oil port of the first manual reversing valve 7.1 is connected with a rod cavity of the first jacking hydraulic cylinder 11.1, a second working oil port of the first manual reversing valve 7.1 is connected with a rodless cavity of the first jacking hydraulic cylinder 11.1, and a stroke detection device is arranged on the first jacking hydraulic cylinder 11.1; the second motor 2.2 is used for driving the second hydraulic pump 3.2, the oil inlet of the second hydraulic pump 3.2 is connected with the oil tank 1, the oil outlet of the second hydraulic pump 3.2 is connected with the oil inlet of the second manual reversing valve 7.2, the first working oil port of the second manual reversing valve 7.2 is connected with the rod cavity of the second jacking hydraulic cylinder 11.2, the second working oil port of the second manual reversing valve 7.2 is connected with the rodless cavity of the second jacking hydraulic cylinder 11.2, and the second jacking hydraulic cylinder 11.2 is provided with a stroke detection device. The two working oil ports of the first manual reversing valve 7.1 are connected with the two cavities of the first jacking hydraulic cylinder 11.1 through corresponding first hoses 9.1; the two working oil ports of the second manual reversing valve 7.2 are connected with the two cavities of the second jacking hydraulic cylinder 11.2 through corresponding second hoses 9.2.
The oil outlet of the first hydraulic pump 3.1 is provided with a first one-way valve 4.1, and the oil outlet of the second hydraulic pump 3.2 is provided with a second one-way valve 4.2; a stop valve 15 is arranged between the oil outlet of the first hydraulic pump 3.1 and the oil outlet of the second hydraulic pump 3.2; the oil outlet of the first one-way valve 4.1 is respectively connected with the oil inlet of the first manual reversing valve 7.1 and the left oil port of the stop valve 15, and the oil outlet of the second one-way valve 4.2 is respectively connected with the oil inlet of the second manual reversing valve 7.2 and the right oil port of the stop valve 15. A stop valve 15 is designed between the oil outlet of the first hydraulic pump 3.1 and the oil outlet of the second hydraulic pump 3.2, and the stop valve 15 is in a closed state in general, so that basic loops of the first lifting hydraulic cylinder 11.1 and the second lifting hydraulic cylinder 11.2 are independent, when a motor or a hydraulic pump in one loop is damaged and cannot operate, the stop valve 15 can be opened, and at the moment, the first lifting hydraulic cylinder 11.1 and the second lifting hydraulic cylinder 11.2 share the other motor pump group, and can continue to work under the speed reduction, so that the risk of suspending a tower crane from high altitude caused by shutdown is avoided, an emergency function is realized, and the reliability and maintainability of a hydraulic system are improved. The arrangement of the first check valve 4.1 and the second check valve 4.2 can prevent the oil from flowing backward at the outlet of the hydraulic pump when the stop valve 15 is opened, so as to ensure the sharing of oil sources.
In some embodiments, the first hydraulic pump 3.1 and the second hydraulic pump 3.2 are both variable displacement plunger pumps; the displacement is adjustable, and then adjusts first jacking pneumatic cylinder 11.1 and second jacking pneumatic cylinder 11.2 running speed, realizes making up the speed difference that first jacking pneumatic cylinder 11.1 and second jacking pneumatic cylinder 11.2 processing size error, hydraulic control valve precision error, pump volumetric efficiency error brought, improves the synchronism.
In some embodiments, the stroke detection device on the first lifting hydraulic cylinder 11.1 includes a first pull rope displacement sensor 12.1 installed on the first lifting hydraulic cylinder 11.1, where the first pull rope displacement sensor 12.1 is in signal connection with a first displacement digital display meter 13.1. The stroke detection device on the second jacking hydraulic cylinder 11.2 comprises a second stay cord displacement sensor 12.2 arranged on the second jacking hydraulic cylinder 11.2, and the second stay cord displacement sensor 12.2 is in signal connection with a second displacement digital display meter 13.2. The displacement data of the first jacking hydraulic cylinder 11.1 are collected by the first stay cord displacement sensor 12.1 and then displayed on the first displacement digital display meter 13.1, and similarly, the displacement data of the second jacking hydraulic cylinder 11.2 are collected by the second stay cord displacement sensor 12.2 and then displayed on the second displacement digital display meter 13.2. The operator can directly observe displacement real-time data, and when the displacement of the first lifting hydraulic cylinder 11.1 and the displacement of the second lifting hydraulic cylinder 11.2 are different, the displacement of the first manual reversing valve 7.1 and the displacement of the second manual reversing valve 7.2 are controlled to reduce the difference.
In some embodiments, a first double one-way throttle valve 8.1 is installed between the first manual reversing valve 7.1 and the first lifting hydraulic cylinder 11.1; one-way throttle valve in the first double one-way throttle valve 8.1 is connected between the first working oil port of the first manual reversing valve 7.1 and the rod cavity of the first lifting hydraulic cylinder 11.1, and the other one-way throttle valve in the first double one-way throttle valve 8.1 is connected between the second working oil port of the first manual reversing valve 7.1 and the rod-free cavity of the first lifting hydraulic cylinder 11.1. A second double-unidirectional throttle valve 8.2 is arranged between the second manual reversing valve 7.2 and the second jacking hydraulic cylinder 11.2; one-way throttle valve of the second two-way throttle valve 8.2 is connected between the first working oil port of the second manual reversing valve 7.2 and the rod cavity of the second lifting hydraulic cylinder 11.2, and the other one-way throttle valve of the second two-way throttle valve 8.2 is connected between the second working oil port of the second manual reversing valve 7.2 and the rod-free cavity of the second lifting hydraulic cylinder 11.2. The double one-way throttle valve described above may be used to adjust the operating speed of the jacking cylinders.
In some embodiments, a first balance valve 10.1 is disposed between the second working oil port of the first manual reversing valve 7.1 and the rodless cavity of the first lifting hydraulic cylinder 11.1, and the control port of the first balance valve 10.1 is connected with the rod cavity of the first lifting hydraulic cylinder 11.1. A second balance valve 10.2 is arranged between a second working oil port of the second manual reversing valve 7.2 and the rodless cavity of the second jacking hydraulic cylinder 11.2, and a control port of the second balance valve 10.2 is connected with the rod-containing cavity of the second jacking hydraulic cylinder 11.2. A first overflow valve 6.1 is arranged between the oil inlet of the first manual reversing valve 7.1 and the oil return port of the first manual reversing valve 7.1. A second overflow valve 6.2 is arranged between the oil inlet of the second manual reversing valve 7.2 and the oil return port of the second manual reversing valve 7.2. The oil inlet of the first manual reversing valve 7.1 is also connected with a first pressure gauge 5.1; and a second pressure gauge 5.2 is further connected to the oil inlet of the second manual reversing valve 7.2.
In some embodiments, the oil return port of the first manual directional valve 7.1 and the oil return port of the second manual directional valve 7.2 are connected in parallel and then connected with the oil inlet of the oil return filter 14, and the oil return port of the oil return filter 14 is connected with the oil tank 1.
The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation and modification made to the above embodiments according to the technical principles of the present utility model are within the scope of the technical solutions of the present utility model.
Claims (8)
1. The double-cylinder synchronous jacking system of the emergency double pump unit comprises two hydraulic control units, wherein the two hydraulic control units respectively control a jacking hydraulic cylinder matched with the two hydraulic control units, the hydraulic control unit comprises a hydraulic pump connected with an oil tank (1), the hydraulic pump is driven by a motor, an oil outlet of the hydraulic pump is connected with an oil inlet of a manual reversing valve, a first working oil port of the manual reversing valve is connected with a rod cavity of the jacking hydraulic cylinder, and a second working oil port of the manual reversing valve is connected with a rodless cavity of the jacking hydraulic cylinder; the jacking hydraulic cylinder is provided with a stroke detection device; the method is characterized in that: a stop valve (15) is arranged between the oil outlets of the hydraulic pumps of the two hydraulic control units;
the hydraulic control unit further comprises a one-way valve, an oil inlet of the one-way valve is connected with an oil outlet of the hydraulic pump, and an oil outlet of the one-way valve is respectively connected with an oil inlet of the manual reversing valve and an oil port of the stop valve (15).
2. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: the hydraulic pump of the hydraulic control unit is a variable displacement plunger pump.
3. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: the stroke detection device comprises a stay cord displacement sensor arranged on the jacking hydraulic cylinder, and the stay cord displacement sensor is in signal connection with the displacement digital display meter.
4. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: a double one-way throttle valve is arranged between the manual reversing valve and the jacking hydraulic cylinder; one-way throttle valve of the double-way throttle valve is connected between a first working oil port of the manual reversing valve and a rod cavity of the jacking hydraulic cylinder, and the other one-way throttle valve of the double-way throttle valve is connected between a second working oil port of the manual reversing valve and a rodless cavity of the jacking hydraulic cylinder.
5. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: a balance valve is arranged between the second working oil port of the manual reversing valve and the rodless cavity of the jacking hydraulic cylinder, and a control port of the balance valve is connected with the rod cavity of the jacking hydraulic cylinder.
6. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: an overflow valve is arranged between an oil inlet of the manual reversing valve and an oil return port of the manual reversing valve.
7. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: and the oil inlet of the manual reversing valve is also connected with a pressure gauge.
8. The emergency double-pump double-cylinder synchronous jacking system according to claim 1, wherein: the oil return ports of the manual reversing valves of the two hydraulic control units are connected in parallel and then connected with the oil inlet of the oil return filter (14), and the oil return port of the oil return filter (14) is connected with the oil tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321771732.1U CN220319974U (en) | 2023-07-07 | 2023-07-07 | Double-cylinder synchronous jacking system of emergency double-pump set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321771732.1U CN220319974U (en) | 2023-07-07 | 2023-07-07 | Double-cylinder synchronous jacking system of emergency double-pump set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220319974U true CN220319974U (en) | 2024-01-09 |
Family
ID=89426190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321771732.1U Active CN220319974U (en) | 2023-07-07 | 2023-07-07 | Double-cylinder synchronous jacking system of emergency double-pump set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220319974U (en) |
-
2023
- 2023-07-07 CN CN202321771732.1U patent/CN220319974U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105502234B (en) | Adjustable speed high thrust hydraulic elevator platform | |
| CN101571155A (en) | Digital electric-hydraulic synchronous control system | |
| CN202064326U (en) | Synchronous split hydraulic hoist | |
| CN108488112B (en) | Differential loop of large-flow hydraulic system and control method thereof | |
| CN201396344Y (en) | Digital electro-hydraulic isochronous control system | |
| CN201526546U (en) | Hydraulic control system of underground anti-explosion hoister adopting multi-pump combination technique | |
| CN207061745U (en) | A kind of hydraulic power unit of three-dimensional adjusting machine | |
| CN111943099A (en) | Energy-saving hydraulic system | |
| CN102758421A (en) | Synchronous split-type hydraulic hoist | |
| CN220319974U (en) | Double-cylinder synchronous jacking system of emergency double-pump set | |
| CN113236613A (en) | Electric hydrostatic driving device of missile transporting and hanging integrated vehicle | |
| CN212982290U (en) | Luffing portal synchronous deviation rectifying system for submersible hoisting operation | |
| CN102616700B (en) | Oil and air hybrid driven lifting control device | |
| CN112922914A (en) | High-efficiency precise synchronous lifting hydraulic control system for segment assembly of shield tunneling machine | |
| CN205592208U (en) | Automobile elevator control system | |
| CN216430089U (en) | Multi-oil-cylinder synchronous control system based on variable flow and displacement feedback | |
| CN106640825B (en) | A kind of axial force of the supports numerical control hydraulic device and method for controlling frequency conversion | |
| CN112483495B (en) | Synchronous motor based multi-cylinder synchronous open-loop control system and control method | |
| CN201512397U (en) | Multi-cylinder synchronization lifting platform | |
| CN216788847U (en) | Synchronous control system of double-lifting-point hydraulic hoist | |
| CN210799577U (en) | Hydraulic valve set debugging test bed for heading machine | |
| CN211116877U (en) | Integrated bidirectional pump-controlled high-speed double-cylinder synchronous hydraulic control system | |
| CN209510754U (en) | A kind of Multi-cylinder lifts/declines synchronous digital hydraulic control system | |
| CN204628110U (en) | A kind of car lift deceleration pressure dwelling loop | |
| CN110240067A (en) | A kind of gantry crane is verted-hangs storehouse integration electrohydraulic control system and its control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |