CN212838651U - Hydraulic synchronous deviation rectifying control loop - Google Patents
Hydraulic synchronous deviation rectifying control loop Download PDFInfo
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- CN212838651U CN212838651U CN202021284092.8U CN202021284092U CN212838651U CN 212838651 U CN212838651 U CN 212838651U CN 202021284092 U CN202021284092 U CN 202021284092U CN 212838651 U CN212838651 U CN 212838651U
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Abstract
The utility model discloses a hydraulic pressure synchronous deviation control circuit that rectifies belongs to the hydraulic pressure technology field, the oil tank comprises an oil tank, the electric oil pump, first hydro-cylinder, reposition of redundant personnel collecting valve and second hydro-cylinder, still including locating the hydraulic control valves between electric oil pump and the reposition of redundant personnel collecting valve and with the chain first switching-over valve of this hydraulic control valves, the hydraulic control valves is by the one-way oil return choke valve that connects gradually, one-way oil feed choke valve, one-way hydrovalve is constituteed, the oil circuit that first hydro-cylinder and second hydro-cylinder are connected with the reposition of redundant personnel collecting valve respectively is connected with the second switching-over valve jointly, be equipped with on the platform that first hydro-cylinder and second hydro-cylinder supported with the. The utility model discloses can solve the problem that can't effectively rectify in the current hydraulic circuit.
Description
Technical Field
The utility model belongs to the technical field of hydraulic pressure, concretely relates to hydraulic pressure synchronous deviation rectification control circuit.
Background
In some mechanical devices, where one cylinder cannot push a load or multiple cylinders are required to keep the platform level, more than two cylinders are required to move synchronously. In the prior art, some synchronous valves, such as a flow dividing and collecting valve, a synchronous motor, etc., are usually added. In some high-precision occasions, a displacement sensor, a servo valve and the like are required to form a closed-loop control system. As described above, most of the hydraulic synchronization circuits are synchronization circuits using two hydraulic cylinders, and there are synchronization circuits using two hydraulic cylinders that are integral multiples of each other. If the number of the synchronous hydraulic cylinders is more than two, the basic principle is similar to the working principle of the circuit of the two hydraulic cylinders.
However, the most common option is to use a combining and diverting valve in many hydraulically synchronous control circuits. Because, this kind of scheme simple structure, the cost is lower, and the pipeline installation is also very convenient. And the synchronization precision of the hydraulic system is mainly determined by the precision of the flow dividing and collecting valve. In the current technology, under the condition that the loads of the two hydraulic cylinders are balanced, the flow distributing precision of the flow distributing and collecting valve is within about 5%. However, if the loads of the two hydraulic cylinders are greatly different, the oil flows at the two outlets of the flow dividing and combining valve are greatly different, and further, a large synchronization error is generated for the hydraulic circuit, and sometimes, the safety of equipment is even endangered. That is, when a synchronization deviation occurs, the hydraulic circuit has no means for correcting the deviation.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a hydraulic pressure synchronization deviation control circuit to solve the problem that can't effectively rectify in the current hydraulic circuit.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a hydraulic pressure synchronous deviation control circuit, the oil tank comprises an oil tank, the electric oil pump, first hydro-cylinder, reposition of redundant personnel collecting valve and second hydro-cylinder, still including locating the hydraulic control valves between electric oil pump and the reposition of redundant personnel collecting valve and with the chain first switching-over valve of this hydraulic control valves, the hydraulic control valves is by the one-way oil return choke valve that connects gradually, one-way oil feed choke valve, one-way hydrovalve is constituteed, the oil circuit that first hydro-cylinder and second hydro-cylinder are connected with the second switching-over valve respectively with the reposition of redundant personnel collecting valve jointly, be equipped with on the platform that first hydro-cylinder and second hydro-cylinder supported with the chain angle sensor of second.
By adopting the scheme, when the angle sensor finds that a certain inclination angle is generated, the flow distributing and collecting valve enables one side of oil to flow back to the oil tank and the other side of the oil to flow into the oil cylinder through the second reversing valve. When the inclination angle is less than a certain value, the two oil cylinders continue to move synchronously. Therefore, the problem of deviation correction of the two oil cylinders can be effectively solved, the inclination angle between the two oil cylinders can be controlled within a certain range finally, and the safety of equipment is ensured.
Further, still including locating the check valve between electric oil pump and the liquid accuse valves.
Furthermore, the electromagnetic overflow valve is arranged between the electric oil pump and the one-way valve and connected with the oil tank.
Furthermore, the valve also comprises a switch valve arranged between the flow distributing and collecting valve and the hydraulic control valve group.
Further, a pressure gauge is arranged on an oil way close to the switch valve.
Furthermore, the first wire changing valve is a J-shaped wire changing valve, and the second reversing valve is an O-shaped reversing valve.
Further, a butterfly valve and a soft connection are arranged between the electric oil pump and the oil tank.
The utility model has the advantages that:
1. the utility model discloses a set up angle sensor and implement interlocking control with the second switching-over valve, the inclination that can guarantee two hydro-cylinders is rectified and is in certain requirement range, very big reduction because the equipment that asynchronous caused damages.
2. The utility model discloses a set up one-way oil return choke valve, one-way oil feed choke valve and guarantee that two hydro-cylinders all can implement throttle control, guarantee its safe motion ascending or descending in-process.
3. The utility model discloses a design liquid accuse valves is by one-way oil return choke valve, one-way oil feed choke valve, one-way hydrovalve component structure, can make this deviation control circuit simply and easily operate the realization.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of the present invention; wherein the reference numerals are: the oil tank comprises an oil tank 1, a butterfly valve 2, a soft connection 3, an electric oil pump 4, an electromagnetic overflow valve 5, a one-way valve 6, a one-way oil return throttling valve 7, a one-way oil inlet throttling valve 8, a one-way hydraulic valve 9, a first reversing valve 10, a platform 11, an angle sensor 12, a second reversing valve 13, a second oil cylinder 14, a flow dividing and collecting valve 15, a first oil cylinder 16, a switch valve 17 and a pressure gauge 18.
Fig. 2 is a schematic diagram of the ascending flow of the platform of the present invention.
Fig. 3 is a flow chart of the oil path during the raising process of the platform of the present invention, wherein the arrows represent the flow direction of the hydraulic oil.
Fig. 4 is the oil path flow diagram of the present invention in the descending process of the platform, wherein the arrows represent the flow direction of the hydraulic oil.
Detailed Description
The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
As shown in fig. 1, the hydraulic synchronous deviation rectification control loop in this embodiment includes an oil tank 1, an electric oil pump 4, a first oil cylinder 16, a flow dividing and collecting valve 15 and a second oil cylinder 14, where the electric oil pump 4 is connected to the oil tank 1 through a soft coupling 3 and a butterfly valve 2, the first oil cylinder 16 and the second oil cylinder 14 are respectively connected to the flow dividing and collecting valve 15, the electric oil pump 4 is connected to the flow dividing and collecting valve 15 through a hydraulic control valve group, and simultaneously, a first direction changing valve 10 is linked to the hydraulic control valve group, the hydraulic control valve group is composed of an oil return one-way throttle valve 7, an oil return one-way throttle valve 8, and a one-way hydraulic valve 9, which are sequentially connected, oil ways of the first oil cylinder 16 and the second oil cylinder 14, which are respectively connected to the flow dividing and collecting valve 15, are commonly connected to a second direction changing valve 13, and an angle. By adopting the scheme, when the angle sensor finds that a certain inclination angle is generated, the flow distributing and collecting valve enables one side of oil to flow back to the oil tank and the other side of the oil to flow into the oil cylinder through the second reversing valve. When the inclination angle is less than a certain value, the two oil cylinders continue to move synchronously. Therefore, the problem of deviation correction of the two oil cylinders can be effectively solved, the inclination angle between the two oil cylinders can be controlled within a certain range finally, and the safety of equipment is ensured.
A check valve 6 is arranged between the electric oil pump 4 and the hydraulic control valve group in the embodiment to ensure the one-way flow of the oil output from the electric oil pump. Meanwhile, an electromagnetic overflow valve 5 connected with the oil tank 1 is arranged between the electric oil pump 4 and the one-way valve 6, and a pressure gauge 18 is arranged on an oil way close to a switch valve 17 in a combined manner, so that the oil pressure safety of the whole control loop is ensured; and the switch valve 17 is arranged between the flow distributing and collecting valve 15 and the hydraulic control valve group for maintenance.
In this embodiment, the first line changing valve is a J-type line changing valve, and the second direction changing valve is an O-type direction changing valve, which can meet the use requirement of the control loop.
The following describes the operation flow of the hydraulic synchronous deviation rectifying control circuit in detail as follows.
As shown in fig. 2 and 3, when the platform needs to be lifted, the valve positions YA1 of the electromagnetic spill valve 5 and YA2 of the first direction valve 10 are electrified: in the synchronous ascending process of the first oil cylinder and the second oil cylinder, oil enters the first oil cylinder 16 and the second oil cylinder 14 from an oil tank 1, a butterfly valve 2, a flexible connection 3, an electric oil pump 4, a one-way valve 6, a YA2 valve position of a first reversing valve 10, a one-way hydraulic valve 9, a one-way oil inlet throttle valve 8, a one-way oil return throttle valve 7, a flow dividing and collecting valve 15 respectively, if the angle sensor 12 finds that the first oil cylinder 16 has deviation, namely the speed of the first oil cylinder is accelerated, the valve position YA3 of the second reversing valve 13 is controlled to be electrified in a linkage mode, so that the oil entering the first oil cylinder 16 is partially shunted and flows back to the oil tank, the ascending speed of the first oil cylinder is reduced, the synchronous relation between the first oil cylinder and the second oil cylinder is adjusted, and when the inclination angle measured by the angle sensor 12 is smaller than a certain value, the valve position YA3 of the, until the platform rises to the right position; if the angle sensor 12 finds that the second oil cylinder 14 has deviation, namely the speed of the second oil cylinder is accelerated, the valve position YA4 of the second reversing valve 13 is correspondingly controlled to be electrified in an interlocking mode, so that part of oil entering the second oil cylinder 14 is shunted and flows back to the oil tank, the ascending speed of the second oil cylinder is slowed down, the synchronous relation between the first oil cylinder and the second oil cylinder is adjusted, and when the inclination angle measured by the angle sensor 12 is smaller than a certain value, the valve position YA4 of the second reversing valve 13 is controlled to be electrified, so that the two oil cylinders continue to synchronously move until the platform ascends to the right position.
As shown in fig. 4, when the platform needs to descend, the valve positions YA1 of the electromagnetic spill valve 5 and YA5 of the first direction valve 10 are powered: in the synchronous descending process of the first oil cylinder and the second oil cylinder, oil flows from an oil tank 1, a butterfly valve 2, a flexible connection 3, an electric oil pump 4, a one-way valve 6, a YA5 position of a first reversing valve 10, the one-way hydraulic valve 9, the YA5 position of the first reversing valve 10 and the one-way hydraulic valve 9, the oil flows back to the oil tank 1 directly through the YA5 position of the first reversing valve 10, the first oil cylinder 16 and the second oil cylinder 14 are opened by an oil circuit and fall under the self weight of a platform, the hydraulic oil flows back through a flow dividing and collecting valve 15 and flows back to the oil tank 1 through a one-way oil return throttling valve 7, a one-way oil inlet throttling valve 8, the one-way hydraulic valve 9 and a YA5 position of the first reversing valve 10 in sequence, if the angle sensor 12 finds that the first oil cylinder 16 has deviation, namely the speed of the first oil cylinder is accelerated, the valve position YA4, the descending speed of the second oil cylinder is accelerated to adjust the synchronous relation between the first oil cylinder and the second oil cylinder, and when the inclination angle measured by the angle sensor 12 is smaller than a certain value, the valve position YA4 of the second reversing valve 13 is controlled to be powered off, so that the two oil cylinders continue to synchronously move until the platform descends to the right position; if the angle sensor 12 finds that the second oil cylinder 14 has deviation, namely the speed of the second oil cylinder is accelerated, the valve position YA3 of the second reversing valve 13 is controlled to be electrified in a linkage mode, so that oil entering the first oil cylinder 16 is partially shunted and flows back to the oil tank, the descending speed of the first oil cylinder is accelerated, the synchronous relation between the first oil cylinder and the second oil cylinder is adjusted, and when the inclination angle measured by the angle sensor 12 is smaller than a certain value, the valve position YA3 of the second reversing valve 13 is controlled to be electrified, so that the two oil cylinders continue to synchronously move until the platform descends to the right position.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a hydraulic pressure control circuit of rectifying in step, includes oil tank (1), electric oil pump (4), first hydro-cylinder (16), reposition of redundant personnel collecting valve (15) and second hydro-cylinder (14), its characterized in that, still including locate electric oil pump and reposition of redundant personnel collecting valve between the hydraulic control valves and with this hydraulic control valves chain first switching-over valve (10), the hydraulic control valves comprises one-way oil return choke valve (7), one-way oil feed choke valve (8), one-way hydraulic valve (9) that connect gradually, first hydro-cylinder and second hydro-cylinder are connected with second switching-over valve (13) jointly with the oil circuit that reposition of redundant personnel collecting valve is connected respectively, be equipped with on platform (11) that first hydro-cylinder and second hydro-cylinder supported with second switching-over valve chain angle sensor (12) of second switching-over valve.
2. The hydraulic synchronous deviation rectifying control circuit according to claim 1, further comprising a check valve (6) disposed between the electric oil pump and the hydraulic control valve set.
3. The hydraulic synchronous deviation rectifying control circuit according to claim 2, further comprising an electromagnetic overflow valve (5) disposed between the electric oil pump and the check valve and connected to the oil tank.
4. The hydraulic synchronous deviation rectifying control circuit according to claim 1, further comprising a switch valve (17) disposed between the flow distributing and collecting valve and the hydraulic control valve set.
5. The hydraulic synchronous deviation rectifying control circuit according to claim 4, characterized in that a pressure gauge (18) is provided on the oil path close to the on-off valve.
6. The hydraulic synchronous deviation rectifying control circuit according to claim 1, wherein the first line changing valve is a J-type line changing valve, and the second direction changing valve is an O-type direction changing valve.
7. The hydraulic synchronous deviation rectifying control circuit according to claim 1, characterized in that a butterfly valve (2) and a soft coupling (3) are arranged between the electric oil pump and the oil tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021284092.8U CN212838651U (en) | 2020-07-03 | 2020-07-03 | Hydraulic synchronous deviation rectifying control loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021284092.8U CN212838651U (en) | 2020-07-03 | 2020-07-03 | Hydraulic synchronous deviation rectifying control loop |
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| CN212838651U true CN212838651U (en) | 2021-03-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370629A (en) * | 2022-09-23 | 2022-11-22 | 徐州建机工程机械有限公司 | Hydraulic jacking system with pump control and valve control |
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2020
- 2020-07-03 CN CN202021284092.8U patent/CN212838651U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370629A (en) * | 2022-09-23 | 2022-11-22 | 徐州建机工程机械有限公司 | Hydraulic jacking system with pump control and valve control |
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