CN104847720A - Hydraulic system and concrete conveying equipment - Google Patents
Hydraulic system and concrete conveying equipment Download PDFInfo
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- CN104847720A CN104847720A CN201510312546.5A CN201510312546A CN104847720A CN 104847720 A CN104847720 A CN 104847720A CN 201510312546 A CN201510312546 A CN 201510312546A CN 104847720 A CN104847720 A CN 104847720A
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- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 1
Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
The invention provides a hydraulic system and concrete conveying equipment. The hydraulic system comprises a first oil pump, a first main oil cylinder, a second main oil cylinder and concrete withdrawing execution assembly, wherein a rod cavity of the first main oil cylinder is communicated with a rod cavity of the second main oil cylinder, a rodless cavity of the first main oil cylinder is connected with a first oil port of the first oil pump, and a rodless cavity of the second main oil cylinder is connected with a second oil port of the first oil pump; the concrete withdrawing execution assembly is connected with the first main oil cylinder and the second main oil cylinder, and used for driving a piston rod of the first main oil cylinder and a piston rod of the second main oil cylinder to withdraw simultaneously. According to the invention, the concrete withdrawing execution assembly can drive the piston rod of the first main oil cylinder and the piston rod of the second main oil cylinder to withdraw simultaneously, so that people only need to start the concrete withdrawing execution assembly when the first main oil cylinder and the second main oil cylinder are required to be changed simultaneously, and a circumstance that the two main oil cylinder cannot be changed simultaneously because the piston rod of any one of the main oil cylinders extends into a concrete cylinder does not occur.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a hydraulic system and concrete conveying equipment.
Background
For the existing concrete conveying equipment, the structure of a hydraulic system of the existing concrete conveying equipment is shown in fig. 1, and the existing concrete conveying equipment specifically comprises the following components: a first oil pump 1 ', a first master cylinder 2 ' and a second master cylinder 3 '; the rodless cavity of the first main oil cylinder 2 'is connected with a first oil port of the first oil pump 1', the rodless cavity of the second main oil cylinder 3 'is connected with a second oil port of the first oil pump 1', the first main oil cylinder 2 'and the second main oil cylinder 3' are connected in series, and rod cavities of the first main oil cylinder and the second main oil cylinder are communicated. In addition, in the concrete transfer apparatus, a large-sized concrete cylinder (not shown) is provided at right ends of the first master cylinder 2 'and the second master cylinder 3'. It can be seen that when the rodless cavity of the first master cylinder 2 'returns oil, the rodless cavity of the second master cylinder 3' takes oil, at this time, the piston rod in the first master cylinder 2 'retracts into the cylinder barrel, and the piston rod in the second master cylinder 3' extends out of the cylinder barrel and enters the concrete cylinder; when the rodless cavity of the first main oil cylinder 2 'is filled with oil, the rodless cavity of the second main oil cylinder 3' returns oil, at the moment, the piston rod in the first main oil cylinder 2 'extends out of the cylinder barrel and enters the concrete cylinder, and the piston rod in the second main oil cylinder 3' retracts into the cylinder barrel. It can be seen that when the piston rod of one oil cylinder retracts, the piston rod of the other oil cylinder extends out of the cylinder barrel and enters the concrete cylinder, the two piston rods cannot retract into the cylinder barrel simultaneously, if the two main oil cylinders need to be replaced, the whole hydraulic system needs to be disassembled, the two main oil cylinders need to be replaced, and then the hydraulic system with the replaced main oil cylinders is installed at the original position. It can be seen that the operation process of simultaneously replacing the first master cylinder 2 'and the second master cylinder 3' is complicated, time and labor are wasted, and the labor intensity of installation personnel is increased.
Disclosure of Invention
The invention provides a hydraulic system, and aims to solve the problem that piston rods of two main oil cylinders in the conventional hydraulic system cannot retract simultaneously. The invention also provides concrete conveying equipment with the hydraulic system.
In one aspect, the present disclosure provides a hydraulic system comprising: the concrete removing device comprises a first oil pump, a first main oil cylinder, a second main oil cylinder and a concrete removing execution assembly; the rod cavity of the first main oil cylinder is communicated with the rod cavity of the second main oil cylinder, the rodless cavity of the first main oil cylinder is connected with a first oil port of the first oil pump, and the rodless cavity of the second main oil cylinder is connected with a second oil port of the first oil pump; the concrete withdrawing execution assembly is respectively connected with the first main oil cylinder and the second main oil cylinder and is used for driving a piston rod of the first main oil cylinder and a piston rod of the second main oil cylinder to retract simultaneously.
Further, in the above-mentioned hydraulic system, the concrete-withdrawal executing assembly includes: the oil supply device comprises a first reversing assembly, a second reversing assembly, an oil outlet pipe and an oil supply assembly; the connecting pipeline between the rodless cavity of the first main oil cylinder and the first oil pump is connected with the oil outlet pipe through the first reversing assembly, and when the first reversing assembly is in a first working state, the rodless cavity of the first main oil cylinder is communicated with the oil outlet pipe; a connecting pipeline between a rodless cavity of the second main oil cylinder and the first oil pump is connected with the oil outlet pipe through a second reversing assembly, and when the second reversing assembly is in a first working state, the rodless cavity of the second main oil cylinder is communicated with the oil outlet pipe; the oil supply assembly is respectively connected with the rod cavity of the first main oil cylinder and the rod cavity of the second main oil cylinder and is used for simultaneously supplying oil to the rod cavity of the first main oil cylinder and the rod cavity of the second main oil cylinder when the first reversing assembly and the second reversing assembly are both in the first working state.
Further, in the hydraulic system, when the first reversing assembly is in the second working state, the rodless cavity of the first main oil cylinder is communicated with the first oil port of the first oil pump; when the second reversing assembly is in a second working state, the rodless cavity of the second main oil cylinder is communicated with the second oil port of the first oil pump.
Further, in the hydraulic system, the first reversing assembly is a first two-position four-way reversing valve; the first oil port of the first two-position four-way reversing valve is connected with the rodless cavity of the first main oil cylinder, the third oil port of the first two-position four-way reversing valve is connected with the first oil port of the first oil pump, and the fourth oil port of the first two-position four-way reversing valve is connected with the oil outlet pipe.
Further, in the hydraulic system, the second reversing assembly is a second two-position four-way reversing valve; the first oil port of the second two-position four-way reversing valve is connected with the rodless cavity of the second main oil cylinder, the third oil port of the second two-position four-way reversing valve is connected with the second oil port of the first oil pump, and the fourth oil port of the second two-position four-way reversing valve is connected with the oil outlet pipe.
Further, in the above-mentioned hydraulic system, the oil supply unit includes: the stop valve, the second oil pump and the first oil tank; a first oil port of the second oil pump is communicated with the first oil tank, and a second oil port of the second oil pump is respectively communicated with a rod cavity of the first master oil cylinder and a rod cavity of the second master oil cylinder; the stop valve is used for controlling the connection and disconnection between a second oil port of the second oil pump and a rod cavity of the first main oil cylinder and a rod cavity of the second main oil cylinder respectively.
Further, in the hydraulic system, the shutoff valve is a manual valve or an electric valve.
Further, the hydraulic system further comprises a second oil tank; wherein, the second oil tank is communicated with the oil outlet pipe.
The present invention provides a hydraulic system comprising: the concrete removing device comprises a first oil pump, a first main oil cylinder, a second main oil cylinder and a concrete removing execution assembly; the rod cavity of the first main oil cylinder is communicated with the rod cavity of the second main oil cylinder, the rodless cavity of the first main oil cylinder is connected with a first oil port of the first oil pump, and the rodless cavity of the second main oil cylinder is connected with a second oil port of the first oil pump; the concrete withdrawing execution assembly is respectively connected with the first main oil cylinder and the second main oil cylinder and is used for driving a piston rod of the first main oil cylinder and a piston rod of the second main oil cylinder to retract simultaneously. Because the concrete withdrawing execution assembly can drive the piston rod of the first main oil cylinder and the piston rod of the second main oil cylinder to simultaneously retract, when the first main oil cylinder and the second main oil cylinder need to be replaced simultaneously, only the concrete withdrawing execution assembly needs to be started, the piston rod of the first main oil cylinder is withdrawn into the cylinder barrel of the first main oil cylinder, and the piston rod of the second main oil cylinder is withdrawn into the cylinder barrel of the second main oil cylinder. Therefore, the hydraulic system can not cause that two master cylinders cannot be replaced simultaneously because the piston rod of any master cylinder extends into the concrete cylinder. Compared with the existing hydraulic system, the two main oil cylinders in the hydraulic system provided by the invention are more convenient to replace, and the labor intensity of installation personnel is reduced.
In another aspect, the invention further provides concrete conveying equipment which is provided with the hydraulic system.
Due to the technical effects of the hydraulic system, the concrete conveying equipment provided with the hydraulic system also has corresponding technical effects.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic system provided in the related art;
FIG. 2 is a schematic structural diagram of a hydraulic system according to an embodiment of the present invention in an operating state;
FIG. 3 is a schematic structural diagram of a hydraulic system according to an embodiment of the present invention in another operating state;
fig. 4 is an oil path directional diagram of a first two-position four-way reversing valve in the hydraulic system according to the embodiment of the present invention when the first two-position four-way reversing valve is in the first gear;
fig. 5 is an oil path directional diagram of a first two-position four-way selector valve in a hydraulic system according to an embodiment of the present invention when the first two-position four-way selector valve is in a second gear position;
fig. 6 is an oil path directional diagram of a second two-position four-way reversing valve in the hydraulic system according to the embodiment of the present invention when the second two-position four-way reversing valve is in the first gear;
fig. 7 is an oil path direction diagram of a second two-position four-way reversing valve in the hydraulic system according to the embodiment of the invention when the second gear is in the second gear.
Detailed Description
The following description will explain specific embodiments of a hydraulic system and a concrete conveying apparatus according to an embodiment of the present invention with reference to the accompanying drawings.
The embodiment of the hydraulic system is as follows:
referring to fig. 2 and 3, a preferred structure of the hydraulic system provided by the embodiment of the invention is shown. As shown in fig. 2 and 3, the present embodiment includes: the system comprises a first oil pump 1, a first main oil cylinder 2, a second main oil cylinder 3 and a concrete withdrawal execution assembly; wherein, the rod cavity of the first main oil cylinder 2 is communicated with the rod cavity of the second main oil cylinder 2. Specifically, the rod chamber of the first master cylinder 2 and the rod chamber of the second master cylinder 2 may be communicated through a connection pipe.
In this embodiment, the rodless cavity of the first master cylinder 2 is connected to a first oil port of the first oil pump 1 (with respect to fig. 2, the oil port at the upper end of the first oil pump 1), and the rodless cavity of the second master cylinder 2 is connected to a second oil port of the first oil pump 1 (with respect to fig. 2, the oil port at the lower end of the first oil pump 1). The concrete withdrawing execution assembly is respectively connected with the first main oil cylinder 2 and the second main oil cylinder 3 and is used for driving a piston rod of the first main oil cylinder 2 and a piston rod of the second main oil cylinder 3 to retract simultaneously. In specific implementation, the concrete-returning execution assembly has various structural forms, and specific connection modes between the concrete-returning execution assembly and the first master cylinder 2 and the second master cylinder 3 can be determined according to the specific structure of the concrete-returning execution assembly, which is not limited in this embodiment.
In this embodiment, since the concrete-releasing executing assembly can drive the piston rod of the first main cylinder 2 and the piston rod of the second main cylinder 3 to retract simultaneously, when the first main cylinder 2 and the second main cylinder 3 need to be replaced simultaneously, only the concrete-releasing executing assembly needs to be started, so that the piston rod of the first main cylinder 2 retracts into the cylinder barrel of the first main cylinder 2, and the piston rod of the second main cylinder 3 retracts into the cylinder barrel of the second main cylinder 3. Therefore, the hydraulic system can not cause that two master cylinders cannot be replaced simultaneously because the piston rod of any master cylinder extends into the concrete cylinder. Compared with the existing hydraulic system, the two main oil cylinders in the hydraulic system provided by the embodiment are more convenient to replace, and the labor intensity of installation personnel is greatly reduced.
Referring to fig. 2 and 3, preferred structures of the concrete-backing executing assembly provided by the embodiment are further shown in the drawings. As shown in fig. 2 and 3, the concrete-unloading executing assembly may include: the oil supply device comprises a first reversing assembly, a second reversing assembly, an oil outlet pipe 6 and an oil supply assembly; the connecting pipeline between the rodless cavity of the first main oil cylinder 2 and the first oil pump 1 is connected with the oil outlet pipe 6 through the first reversing assembly, when the first reversing assembly is in a first working state, the rodless cavity of the first main oil cylinder 2 is communicated with the oil outlet pipe 6, and at the moment, the rodless cavity of the first main oil cylinder 2 is not communicated with the first oil pump 1. A connecting pipeline between the rodless cavity of the second main oil cylinder 3 and the first oil pump 1 is connected with the oil outlet pipe 6 through a second reversing assembly, when the second reversing assembly is in a first working state, the rodless cavity of the second main oil cylinder 3 is communicated with the oil outlet pipe 6, and at the moment, the rodless cavity of the second main oil cylinder 3 is not communicated with the first oil pump 1. The oil supply assembly is respectively connected with the rod cavity of the first main oil cylinder 2 and the rod cavity of the second main oil cylinder 3, and the oil supply assembly is used for simultaneously supplying oil to the rod cavity of the first main oil cylinder 2 and the rod cavity of the second main oil cylinder 3 when the first reversing assembly and the second reversing assembly are both in a first working state.
When the hydraulic control system works specifically, if the first reversing assembly and the second reversing assembly are both in the first working state, the oil supply assembly supplies oil to the rod cavity of the first main oil cylinder 2 and the rod cavity of the second main oil cylinder 3 simultaneously, and at the moment, the piston rod of the first main oil cylinder 2 and the piston rod of the second main oil cylinder 3 retract under the action of oil pressure simultaneously. Along with the simultaneous retraction of the two piston rods, oil in the rodless cavity of the first main oil cylinder 2 and oil in the rodless cavity of the second main oil cylinder 2 can be conveyed to the oil outlet pipe 6, and meanwhile, the oil in the rodless cavity of the first main oil cylinder 2 cannot enter the rodless cavity of the second main oil cylinder 3 through the first oil pump 1.
In this embodiment, when the first reversing assembly is in the second working state, the rodless cavity of the first master cylinder 2 is communicated with the first oil port of the first oil pump 1; when the second reversing assembly is in the second working state, the rodless cavity of the second main oil cylinder 3 is communicated with the second oil port of the first oil pump 1. Therefore, when the reversing assembly is in the second working state, the oil supply assembly does not work, at the moment, the rod cavity of the first main oil cylinder 2 is communicated with the rod cavity of the second main oil cylinder 3, and the rodless cavity of the first main oil cylinder 2 is communicated with the rodless cavity of the second main oil cylinder 3 through the first oil pump 1, so that the hydraulic system can be ensured to realize a normal oil pumping function.
In the above embodiment, the first reversing assembly and the second reversing assembly have various structural forms, and the specific structures of the first reversing assembly and the second reversing assembly may be the same or different. The specific working process of the hydraulic system is described below by using a two-position four-way reversing valve as the first reversing assembly and the second reversing assembly.
As shown in fig. 2 to 5, the first reversing component may be a first two-position four-way reversing valve 4, and the first two-position four-way reversing valve 4 includes four oil ports and two shift positions. The first port K1 of the first two-position four-way reversing valve 4 is connected with the rodless cavity of the first master cylinder 2, the second port K2 of the first two-position four-way reversing valve 4 is suspended, the third port K3 of the first two-position four-way reversing valve 4 is connected with the first port of the first oil pump 1, and the fourth port K4 of the first two-position four-way reversing valve 4 is connected with the oil outlet pipe 6.
As shown in fig. 2, 3, 6 and 7, the second reversing assembly may also be a second two-position four-way reversing valve 5, and similarly, the second two-position four-way reversing valve 5 also includes two shift stages and four oil ports. The first oil port S1 of the second two-position four-way reversing valve 5 is connected with the rodless cavity of the second main oil cylinder 2, the second oil port S2 of the second two-position four-way reversing valve 5 is suspended, the third oil port S3 of the second two-position four-way reversing valve 5 is connected with the second oil port of the first oil pump 1, and the fourth oil port S4 of the second two-position four-way reversing valve 5 is connected with the oil outlet pipe 6.
In this embodiment, the oil supply unit may include: a stop valve 7, a second oil pump 8 and a first oil tank 9; a first oil port of the second oil pump 8 is communicated with the first oil tank 9, and a second oil port of the second oil pump 8 is respectively communicated with a rod cavity of the first master oil cylinder 2 and a rod cavity of the second master oil cylinder 3; the stop valve 7 is used for controlling the connection and disconnection between a second oil port of the second oil pump 8 and a rod cavity of the first main oil cylinder 2 and a rod cavity of the second main oil cylinder 3 respectively. During specific implementation, the stop valve can be a manual valve or an electric valve, the number of the stop valves 7 can be one, and the stop valve is arranged on a pipeline where the second oil pump 8 is communicated with the rod cavity of the first master cylinder 2 and the rod cavity of the second master cylinder 3. Of course, the number of the stop valves 7 is not limited to one, and the specific number thereof may be determined according to actual conditions, and accordingly, the setting positions of the respective stop valves may be adjusted according to the number thereof to ensure the normal operation of the oil supply unit.
When the hydraulic control device works specifically, as shown in fig. 3, 4 and 6, when the first reversing assembly and the second reversing assembly are both in the first working state and the stop valve 7 is in the open state, the oil in the first oil tank 9 enters the rod cavity of the first master cylinder 2 and the rod cavity of the second master cylinder 3 respectively under the action of the second oil pump 8, and the piston rod of the first master cylinder 2 and the piston rod of the second master cylinder 3 retract simultaneously under the action of hydraulic pressure. At this time, the first two-position four-way reversing valve 4 and the second two-position four-way reversing valve 5 are both in the first gear. Specifically, the oil in the rodless chamber of the first master cylinder 2 firstly enters the first two-position four-way selector valve 4 from the first oil port K1 of the first two-position four-way selector valve 4 in the direction indicated by the arrow a in fig. 4, and then flows out of the fourth oil port K4 of the first two-position four-way selector valve 4 in the direction indicated by the arrow B in fig. 4 and enters the oil outlet pipe 6; similarly, the oil in the rodless chamber of the second master cylinder 3 first enters the second two-position four-way selector valve 5 from the first oil port S1 of the second two-position four-way selector valve 5 in the direction indicated by the arrow E in fig. 6, and then flows out of the fourth oil port S4 of the second two-position four-way selector valve 5 in the direction indicated by the arrow F in fig. 6 and enters the oil outlet pipe 6. Thus, the hydraulic system provided by the embodiment realizes that the piston rods of the two master cylinders retract simultaneously.
As shown in fig. 2, 5, and 7, when the first reversing assembly and the second reversing assembly are both in the second working state, the stop valve 7 is in the closed state, the rod chamber of the first master cylinder 2 and the rod chamber of the second master cylinder 3 are kept in the communicated state, and the first two-position four-way reversing valve 4 and the second two-position four-way reversing valve 5 are both in the second gear position. Specifically, the oil in the rodless chamber of the first master cylinder 2 firstly enters the first two-position four-way selector valve 4 from the first oil port K1 of the first two-position four-way selector valve 4 in the direction indicated by the arrow C in fig. 5, then flows out from the third oil port K3 of the first two-position four-way selector valve 4 in the direction indicated by the arrow D in fig. 5, and then the oil flowing out from the third oil port K3 of the first two-position four-way selector valve 4 enters the second two-position four-way selector valve 5 from the third oil port S3 of the second two-position four-way selector valve 5 in the direction indicated by the arrow G in fig. 7, and then flows out from the first oil port S1 of the second two-position four-way selector valve 5 in the direction indicated by the arrow H in fig. 7 and enters the rodless chamber of the second master cylinder 3. At this time, the piston rod of the second master cylinder 3 extends out, and the oil in the rod chamber of the second master cylinder 3 enters the rod chamber of the first master cylinder 2, so that the circulation of the oil is completed. It can be seen that the hydraulic system provided by the embodiment can also realize normal oil pumping of the hydraulic system.
In the above embodiment, the hydraulic system may further include a second oil tank 10, and the second oil tank 10 may be communicated with the oil outlet pipe 6, so as to collect the oil flowing out of the master cylinders of the first master cylinder 2 and the second master cylinder 3 for recycling, thereby preventing the oil from polluting the environment.
In conclusion, the hydraulic system provided by the embodiment realizes the simultaneous retraction of the piston rods of the two master cylinders, the first master cylinder and the second master cylinder are more convenient to replace, and the labor intensity of installation personnel is reduced.
Concrete conveying equipment embodiment:
the invention also provides concrete conveying equipment which is provided with the hydraulic system. The specific implementation of the hydraulic system may refer to the above description, and the description of the embodiment is omitted here.
Due to the technical effects of the hydraulic system, the concrete conveying equipment provided with the hydraulic system also has corresponding technical effects.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A hydraulic system, comprising: the concrete pump comprises a first oil pump (1), a first main oil cylinder (2), a second main oil cylinder (3) and a concrete withdrawal execution assembly; wherein,
a rod cavity of the first master cylinder (2) is communicated with a rod cavity of the second master cylinder (3), a rodless cavity of the first master cylinder (2) is connected with a first oil port of the first oil pump (1), and a rodless cavity of the second master cylinder (3) is connected with a second oil port of the first oil pump (1);
the concrete withdrawing execution assembly is respectively connected with the first main oil cylinder (2) and the second main oil cylinder (3) and used for driving a piston rod of the first main oil cylinder (2) and a piston rod of the second main oil cylinder (3) to retract simultaneously.
2. The hydraulic system of claim 1, wherein the concrete withdrawal actuation assembly comprises: the oil supply device comprises a first reversing assembly, a second reversing assembly, an oil outlet pipe (6) and an oil supply assembly; wherein,
a connecting pipeline between the rodless cavity of the first main oil cylinder (2) and the first oil pump (1) is connected with the oil outlet pipe (6) through the first reversing assembly, and when the first reversing assembly is in a first working state, the rodless cavity of the first main oil cylinder (2) is communicated with the oil outlet pipe (6);
a connecting pipeline between the rodless cavity of the second main oil cylinder (3) and the first oil pump (1) is connected with the oil outlet pipe (6) through the second reversing assembly, and when the second reversing assembly is in a first working state, the rodless cavity of the second main oil cylinder (3) is communicated with the oil outlet pipe (6);
the oil supply assembly is respectively connected with the rod cavity of the first main oil cylinder (2) and the rod cavity of the second main oil cylinder (3) and used for supplying oil to the rod cavity of the first main oil cylinder (2) and the rod cavity of the second main oil cylinder (3) simultaneously when the first reversing assembly and the second reversing assembly are both in the first working state.
3. The hydraulic system of claim 2,
when the first reversing assembly is in a second working state, the rodless cavity of the first main oil cylinder (2) is communicated with the first oil port of the first oil pump (1);
and when the second reversing assembly is in a second working state, the rodless cavity of the second main oil cylinder (3) is communicated with the second oil port of the first oil pump (1).
4. A hydraulic system as claimed in claim 3, characterized in that the first reversing assembly is a first two-position four-way reversing valve (4); wherein,
the first oil port of the first two-position four-way reversing valve (4) is connected with the rodless cavity of the first main oil cylinder (2), the third oil port of the first two-position four-way reversing valve (4) is connected with the first oil port of the first oil pump (1), and the fourth oil port of the first two-position four-way reversing valve (4) is connected with the oil outlet pipe (6).
5. The hydraulic system according to claim 3, characterized in that the second reversing assembly is a second two-position four-way reversing valve (5); wherein,
the first oil port of the second two-position four-way reversing valve (5) is connected with the rodless cavity of the second main oil cylinder (3), the third oil port of the second two-position four-way reversing valve (5) is connected with the second oil port of the first oil pump (1), and the fourth oil port of the second two-position four-way reversing valve (5) is connected with the oil outlet pipe (6).
6. The hydraulic system of any one of claims 2-5, wherein the oil supply assembly comprises: a stop valve (7), a second oil pump (8) and a first oil tank (9); wherein,
a first oil port of the second oil pump (8) is communicated with the first oil tank (9), and a second oil port of the second oil pump (8) is respectively communicated with a rod cavity of the first master oil cylinder (2) and a rod cavity of the second master oil cylinder (3);
the stop valve (7) is used for controlling the connection and disconnection between a second oil port of the second oil pump (8) and a rod cavity of the first main oil cylinder (2) and a rod cavity of the second main oil cylinder (3) respectively.
7. Hydraulic system according to claim 6, characterised in that the shut-off valve (7) is a manual or electric valve.
8. A hydraulic system as claimed in any one of claims 2 to 5 or 7, characterized by further comprising a second oil tank (10); wherein the second oil tank (10) is communicated with the oil outlet pipe (6).
9. A concrete conveying apparatus, characterized in that a hydraulic system according to any one of claims 1-8 is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510312546.5A CN104847720A (en) | 2015-06-08 | 2015-06-08 | Hydraulic system and concrete conveying equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510312546.5A CN104847720A (en) | 2015-06-08 | 2015-06-08 | Hydraulic system and concrete conveying equipment |
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| Publication Number | Publication Date |
|---|---|
| CN104847720A true CN104847720A (en) | 2015-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510312546.5A Pending CN104847720A (en) | 2015-06-08 | 2015-06-08 | Hydraulic system and concrete conveying equipment |
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| CN (1) | CN104847720A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324719A (en) * | 2020-11-04 | 2021-02-05 | 北京自动化控制设备研究所 | Redundancy electro-hydrostatic actuating system and control method |
-
2015
- 2015-06-08 CN CN201510312546.5A patent/CN104847720A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112324719A (en) * | 2020-11-04 | 2021-02-05 | 北京自动化控制设备研究所 | Redundancy electro-hydrostatic actuating system and control method |
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Application publication date: 20150819 |