CN220149156U - Parallel circuit electrohydraulic energy recovery system valve group - Google Patents
Parallel circuit electrohydraulic energy recovery system valve group Download PDFInfo
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- CN220149156U CN220149156U CN202321329051.XU CN202321329051U CN220149156U CN 220149156 U CN220149156 U CN 220149156U CN 202321329051 U CN202321329051 U CN 202321329051U CN 220149156 U CN220149156 U CN 220149156U
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- Prior art keywords
- oil port
- valve
- oil
- energy recovery
- recovery system
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- 238000011084 recovery Methods 0.000 title claims abstract description 21
- 239000003921 oil Substances 0.000 claims description 130
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 238000005381 potential energy Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Abstract
The utility model provides a parallel circuit electrohydraulic energy recovery system valve group, which comprises a first valve block and a second valve block; the first valve block comprises a first electromagnetic valve, a second electromagnetic valve, a first throttle valve, a second throttle valve, a third throttle valve, a proportional flow control valve, an oil port P, an oil port T, an oil port C, an oil port PB1, an oil port P1 and an oil port T1; the second valve block comprises at least one reversing branch connected in parallel, and the reversing branch is provided with a direction control valve; according to the utility model, the load is controlled to descend through the second electromagnetic valve, the first throttle valve is opened, the second electromagnetic valve is powered on, an oil way flows out from the lifting oil cylinder, the oil way reaches the oil port P through the oil port C and the first throttle valve, the motor pump connected to the oil port P is driven to rotate, energy is converted into electric energy, and the electric energy is collected through the storage battery, so that energy recovery is realized, the excessive pressure of the energy accumulator is avoided, and the potential safety hazard is reduced.
Description
Technical Field
The utility model belongs to the technical field of hydraulic systems, and particularly relates to a valve group of a parallel circuit electrohydraulic energy recovery system.
Background
The electric forklift is a forklift driven by electric energy, when the forklift lifts a heavy object, the pump motor starts to work, oil is filled into the rodless cavity of the lifting oil cylinder to drive the piston rod to extend out, and then the piston rod drives the heavy object to lift; when the goods on the forklift descends, under the action of the dead weight of the goods, the rod cavity of the lifting oil cylinder is used for oil inlet, the rod cavity is not used for oil return, and the pump motor does not work; however, in the lower cavity process, potential energy is not effectively recycled, and energy waste is formed.
In the prior art, as disclosed in chinese patent application publication No. CN105236317a, an electric fork lift truck and a potential energy recovery system and method thereof are disclosed, when in descending operation, a lifting cylinder is unidirectionally communicated with an accumulator, potential energy generated by cargo self weight acts on the lifting cylinder, hydraulic oil in a rodless cavity of the lifting cylinder is pressed into the accumulator, and thus the potential energy is converted into hydraulic energy to be stored in the accumulator; during lifting operation in the next cycle, the energy accumulator conveys the stored hydraulic oil to a rodless cavity of the lifting oil cylinder for driving cargoes to lift, so that the recycling of energy sources is realized, and the energy waste is avoided; however, in order to recover larger potential energy, the accumulator in the mode needs to be provided with larger volume, and the pressure in the accumulator is also larger, so that certain potential safety hazards exist.
Therefore, a parallel circuit electrohydraulic energy recovery system valve group capable of recycling energy and reducing potential safety hazards is required to be designed to solve the technical problems faced at present.
Disclosure of Invention
Aiming at the defects existing in the prior art, the utility model provides a parallel loop electrohydraulic energy recovery system valve group capable of recycling energy and reducing potential safety hazards.
The technical scheme of the utility model is as follows: the parallel circuit electrohydraulic energy recovery system valve group comprises a first valve block and a second valve block; the first valve block comprises a first electromagnetic valve, a second electromagnetic valve, a first throttle valve, a second throttle valve, a third throttle valve, a proportional flow control valve, an oil port P, an oil port T, an oil port C, an oil port PB1, an oil port P1 and an oil port T1; the second valve block comprises at least one reversing branch connected in parallel, and the reversing branch is provided with a direction control valve; the first electromagnetic valve is connected in series between the oil port P and the oil port C, the proportional flow control valve is connected in series between the oil port C and the oil port T, the first throttle valve and the second electromagnetic valve are connected in series between the oil port P and the oil port C, the second throttle valve is connected in series between the oil port C and the oil port T, and the third throttle valve is connected in series between the oil port PB1 and the oil port T; the direction control valve is connected with the oil port P1 and the oil port T1.
The parallel circuit electrohydraulic energy recovery system valve group further comprises an overflow valve, and the overflow valve is connected in series between the oil port P and the oil port T.
And the oil port PB1 is connected with a pressure measuring joint.
An oil port PQ1 is connected to the oil port C, and a first pressure sensor is connected to the oil port PQ 1.
An oil port PQ2 is connected to the oil port P, and a second pressure sensor is connected to the oil port PQ 2.
And the oil port PB1 is connected with an energy accumulator.
The utility model has the beneficial effects that:
(1) According to the utility model, the load is controlled to descend through the second electromagnetic valve, the first throttle valve is opened, the second electromagnetic valve is powered on, an oil way flows out from the lifting oil cylinder, the oil way reaches the oil port P through the oil port C and the first throttle valve, the motor pump connected to the oil port P is driven to rotate, energy is converted into electric energy, and the electric energy is collected through the storage battery, so that energy recovery is realized, the excessive pressure of the energy accumulator is avoided, and the potential safety hazard is reduced;
(2) The flow control valve and the first throttle valve can regulate and control the flow of the loop to realize the control of the load falling speed.
Drawings
FIG. 1 is a schematic diagram of a parallel circuit electro-hydraulic energy recovery system valve block of the present utility model.
Fig. 2 is a schematic diagram of a first valve block of the present utility model.
Fig. 3 is a schematic diagram of a second valve block of the present utility model.
Detailed Description
Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative, and is in no way intended to limit the utility model, its application, or uses. The present utility model may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the utility model to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.
The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
As shown in fig. 1 to 3, the parallel circuit electrohydraulic energy recovery system valve group comprises a first valve block and a second valve block; the first valve block comprises a first electromagnetic valve 3.1, a second electromagnetic valve 3.2, a first throttle valve 4.0, a second throttle valve 6.1, a third throttle valve 6.2, a proportional flow control valve 5.0, an oil port P, an oil port T, an oil port C, an oil port PB1, an oil port P1 and an oil port T1; the second valve block comprises at least one reversing branch connected in parallel, and the reversing branch is provided with a direction control valve; the first electromagnetic valve 3.1 is connected in series between the oil port P and the oil port C, the proportional flow control valve 5.0 is connected in series between the oil port C and the oil port T, the first throttle valve 4.0 and the second electromagnetic valve 3.2 are connected in series between the oil port P and the oil port C, the second throttle valve 6.1 is connected in series between the oil port C and the oil port T, and the third throttle valve 6.2 is connected in series between the oil port PB1 and the oil port T; the direction control valve is connected with the oil port P1 and the oil port T1; in the utility model, when a load is lifted, the first electromagnetic valve 3.1 is electrified, other valves are closed, an oil path reaches an oil port C through a pump outlet and the first electromagnetic valve 3.1, and the oil enters a lifting oil cylinder from the oil port C to lift the load; when the load is lowered, the load can be controlled by the proportional flow control valve 5.0, the proportional flow control valve 5.0 is powered on, other valves are closed, an oil way flows out of the lifting oil cylinder, and the oil way reaches the oil port T through the oil port C and the proportional flow control valve 5.0; meanwhile, the load can be controlled to descend through the second electromagnetic valve 3.2, the first throttle valve 4.0 is opened, the second electromagnetic valve 3.2 is powered on, an oil way flows out of the lifting oil cylinder, the oil way reaches the oil port P through the oil port C and the first throttle valve 4.0, the motor pump connected to the oil port P is driven to rotate, energy is converted into electric energy, and the electric energy is collected through the storage battery to realize energy recovery, so that the excessive pressure of the energy accumulator is avoided, and the potential safety hazard is reduced; the proportional flow control valve 5.0 and the first throttle valve 4.0 can regulate and control the flow of the loop to realize the control of the load falling speed.
In the embodiment, the second valve block realizes the functions of controlling the corresponding oil cylinders to drive the fork to move sideways, the steering system, the fork to incline and the like; for example, as shown in fig. 1, the reversing branch with the first direction control valve 11.1 is connected with the middle oil port A1 and the oil port B1 and the oil cylinder driving the fork to incline. When the left tilting of the frame is controlled, the left position of the first direction control valve 11.1 is electrified, the oil inlet path of the valve flows out from the pump outlet, reaches the rodless cavity of the corresponding oil cylinder through the left position of the first direction control valve 11.1, and drives the frame to tilt left through the oil cylinder; the oil outlet path is a rod cavity corresponding to the oil cylinder, discharges oil, and flows back to the oil tank through the left position of the first direction control valve 11.1. When the frame is controlled to tilt right, the right position of the first direction control valve 11.1 is electrified, the oil inlet path of the valve flows out from the pump outlet, reaches the rod cavity of the corresponding oil cylinder through the right position of the first direction control valve 11.1, and drives the frame to tilt right through the oil cylinder; the oil outlet is a rodless cavity corresponding to the oil cylinder, and the oil is discharged and flows back to the oil tank through the right position of the first direction control valve 11.1. The cylinder action of the fork lateral shifting and steering system is similar to the cylinder action of the fork tilting control, and the corresponding cylinders are respectively connected with the second direction control valve 11.2 and the third direction control valve 11.3.
In some embodiments, the parallel circuit electrohydraulic energy recovery system valve group further comprises an overflow valve 2.0, wherein the overflow valve 2.0 is connected in series between the oil port P and the oil port T, and when the pressure in the overflow valve 2.0 circuit is higher than the set pressure of the overflow valve 2.0 in the load lifting process, overflow pressure relief is performed through the overflow valve 2.0, so that overload of the system is prevented.
In some embodiments, the oil port PB1 is connected with a pressure measuring joint 8.5, and pressure measurement is conveniently performed on the corresponding loop through the pressure measuring joint 8.5.
In some embodiments, an oil port PQ1 is connected to the oil port C, and a first pressure sensor 9.1 is connected to the oil port PQ 1; an oil port PQ2 is connected to the oil port P, and a second pressure sensor 9.2 is connected to the oil port PQ 2; the pressure of the corresponding loop can be detected in real time through the first pressure sensor 9.1 and the second pressure sensor 9.2, and the pressure abnormality can be found in time, so that the operation safety is improved.
In some embodiments, the oil port PB1 is connected to an accumulator, and the accumulator is used to ensure that the system pressure is kept in a relatively stable pressure interval, and when the pressure value of the accumulator is lower than a preset value, the accumulator is charged, and when the pressure value of the accumulator is higher than the preset value, the accumulator is stopped, and when the system pressure is insufficient, the energy stored in the accumulator is released, so that the stability and reliability of the system pressure are ensured.
Thus, various embodiments of the present utility model have been described in detail. In order to avoid obscuring the concepts of the utility model, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.
The above examples only represent some embodiments of the utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (6)
1. A parallel circuit electrohydraulic energy recovery system valve group is characterized in that:
comprises a first valve block and a second valve block;
the first valve block comprises a first electromagnetic valve, a second electromagnetic valve, a first throttle valve, a second throttle valve, a third throttle valve, a proportional flow control valve, an oil port P, an oil port T, an oil port C, an oil port PB1, an oil port P1 and an oil port T1;
the second valve block comprises at least one reversing branch connected in parallel, and the reversing branch is provided with a direction control valve;
the first electromagnetic valve is connected in series between the oil port P and the oil port C, the proportional flow control valve is connected in series between the oil port C and the oil port T, the first throttle valve and the second electromagnetic valve are connected in series between the oil port P and the oil port C, the second throttle valve is connected in series between the oil port C and the oil port T, and the third throttle valve is connected in series between the oil port PB1 and the oil port T; the direction control valve is connected with the oil port P1 and the oil port T1.
2. The parallel circuit electro-hydraulic energy recovery system valve set of claim 1, wherein: the hydraulic oil pump further comprises an overflow valve, and the overflow valve is connected in series between the oil port P and the oil port T.
3. The parallel circuit electro-hydraulic energy recovery system valve set of claim 1, wherein: and the oil port PB1 is connected with a pressure measuring joint.
4. The parallel circuit electro-hydraulic energy recovery system valve set of claim 1, wherein: an oil port PQ1 is connected to the oil port C, and a first pressure sensor is connected to the oil port PQ 1.
5. The parallel circuit electro-hydraulic energy recovery system valve set of claim 1, wherein: an oil port PQ2 is connected to the oil port P, and a second pressure sensor is connected to the oil port PQ 2.
6. The parallel circuit electro-hydraulic energy recovery system valve set of claim 1, wherein: and the oil port PB1 is connected with an energy accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321329051.XU CN220149156U (en) | 2023-05-29 | 2023-05-29 | Parallel circuit electrohydraulic energy recovery system valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321329051.XU CN220149156U (en) | 2023-05-29 | 2023-05-29 | Parallel circuit electrohydraulic energy recovery system valve group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220149156U true CN220149156U (en) | 2023-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321329051.XU Active CN220149156U (en) | 2023-05-29 | 2023-05-29 | Parallel circuit electrohydraulic energy recovery system valve group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220149156U (en) |
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2023
- 2023-05-29 CN CN202321329051.XU patent/CN220149156U/en active Active
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