CN212838668U - Double-pump unloading valve group - Google Patents
Double-pump unloading valve group Download PDFInfo
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- CN212838668U CN212838668U CN202021439763.3U CN202021439763U CN212838668U CN 212838668 U CN212838668 U CN 212838668U CN 202021439763 U CN202021439763 U CN 202021439763U CN 212838668 U CN212838668 U CN 212838668U
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Abstract
The application discloses two pump off-load valves, including first oil circuit, the second oil circuit, third oil circuit and off-load oil circuit, first oil circuit and second oil circuit are parallelly connected, and first oil circuit and second oil circuit both communicate with the third oil circuit, be provided with first check valve on the first oil circuit, the export and the third oil circuit of first check valve communicate, still parallelly connected have first overflow valve on the first oil circuit, the import of first overflow valve communicates with the export of first check valve, the export and the off-load oil circuit of first overflow valve communicate, be provided with the second check valve on the second oil circuit, the export and the third oil circuit of second check valve communicate, still parallelly connected have the second overflow valve on the second oil circuit, the import of second overflow valve communicates with the export of first check valve, the export and the off-load oil circuit of second overflow valve communicate. This application has extension equipment life's effect.
Description
Technical Field
The application relates to the field of hydraulic devices for engineering machinery, in particular to a double-pump unloading valve bank.
Background
The hydraulic system functions to increase the force by changing the pressure. A complete hydraulic system consists of five parts, namely a power element, an actuator, a control element, an auxiliary element (attachment) and hydraulic oil. Hydraulic systems can be divided into two categories: hydraulic transmission systems and hydraulic control systems. Hydraulic drive systems have as a primary function the transmission of power and motion. The hydraulic control system is then required to have the hydraulic system output meet specific performance requirements (particularly dynamic performance).
An existing hydraulic oil circuit comprises an oil inlet and an oil outlet, an oil pump is arranged at the oil inlet, an execution element is arranged at the oil outlet, an oil duct is communicated between the oil inlet and the oil outlet, and a one-way valve is further arranged between the oil inlet and the oil outlet.
By adopting the scheme, in the work, the oil pump pumps the hydraulic oil into the oil duct from the oil inlet, the hydraulic oil flows to the oil outlet through the one-way valve and drives the actuating element, but in the hydraulic oil duct, the oil pump continuously works, so that the pressure in the oil duct is continuously increased, when the pressure in the oil duct is too high, the equipment is easily damaged, and a part to be improved exists.
SUMMERY OF THE UTILITY MODEL
In order to guarantee that the pressure in the oil duct is in a reasonable scope to reduce the damage of equipment, and then the life of extension equipment, this application provides a double pump unloading valves.
The application provides a double-pump unloading valve group adopts following technical scheme: a double-pump unloading valve set comprises a first oil way, a second oil way, a third oil way and an unloading oil way, wherein the first oil way is connected with the second oil way in parallel, the first oil way and the second oil way are both communicated with the third oil way, a first one-way valve is arranged on the first oil way, an outlet of the first one-way valve is communicated with the third oil way, a first overflow valve is further connected with the first oil way in parallel, an inlet of the first overflow valve is communicated with an outlet of the first one-way valve, an outlet of the first overflow valve is communicated with the unloading oil way, a second one-way valve is arranged on the second oil way, an outlet of the second one-way valve is communicated with the third oil way, a second overflow valve is further connected with the second oil way in parallel, an inlet of the second overflow valve is communicated with an outlet of the first one-way valve, and an outlet of the second overflow valve is communicated with the unloading oil way.
By adopting the technical scheme, in work, hydraulic oil flows into the third oil way through the first oil way and the second oil way respectively, when the oil pressure in the first oil way reaches the opening value of the first overflow valve, the first overflow valve is opened, and the hydraulic oil flows into the unloading oil way through the first overflow valve; when the oil pressure in the second oil way reaches the opening value of the second overflow valve, the second overflow valve is opened, and the hydraulic oil flows into the unloading oil way through the second overflow valve; when the oil pressure in the third oil path reaches the opening value of the first overflow valve or the second overflow valve, the first overflow valve or the second overflow valve is opened, hydraulic oil flows into the unloading oil path through the first overflow valve or the second overflow valve, and the first check valve and the first overflow valve, the second check valve and the second overflow valve which are arranged in parallel are used for helping to ensure that the pressure in the hydraulic pipeline is kept in a reasonable range, so that the damage to equipment is reduced.
Preferably: and a fourth oil path is further connected to the third oil path, a one-way throttle valve is arranged on the fourth oil path, and an inlet of the one-way throttle valve is communicated with the third oil path.
Through adopting above-mentioned technical scheme, in operation, the staff adjusts one-way throttle valve to the velocity of flow of hydraulic oil in the control fourth oil circuit, and then helps improving the suitability of valves.
Preferably: the first oil way, the second oil way, the third oil way, the fourth oil way, the unloading oil way, the first check valve, the second check valve, the first overflow valve, the second overflow valve and the one-way throttle valve are integrated on the valve block.
Through adopting above-mentioned technical scheme, be integrated into a whole with each hydraulic component with the help of the valve piece, help improving the convenience that the valves used.
Preferably: the side wall of the central valve block is provided with a first oil inlet and a second oil inlet, the first oil inlet is communicated with the first oil duct, the second oil inlet is communicated with the second oil duct, a first oil pipe is detachably fixed on the first oil inlet, and a second oil pipe is detachably fixed on the second oil inlet.
Through adopting above-mentioned technical scheme, in the work, the staff is with the help of can dismantling fixed first oil pipe and second oil pipe respectively with the two and the oil tank intercommunication of first oil inlet and second oil inlet, helps improving the convenience that the valve block used.
Preferably: the first oil inlet and the second oil inlet are both provided with internal threads, the first oil pipe and the second oil pipe are both provided with external threads, the first oil port is in threaded fit with the first oil pipe, and the second oil port is in threaded fit with the second oil pipe.
Through adopting above-mentioned technical scheme, with the help of the screw-thread fit of internal thread and external screw thread, specifically realized first hydraulic fluid port and first oil pipe can dismantle fixed connection, second hydraulic fluid port and second oil pipe can dismantle fixed connection, help reducing staff's the work degree of difficulty to help improving staff's work efficiency.
Preferably: and high-pressure sealing rings are arranged between the first oil pipe and the first oil inlet and between the second oil pipe and the second oil inlet.
Through adopting above-mentioned technical scheme, with the help of high-pressure seal circle, help improving the sealed compactness of valves.
Preferably: and an oil return port is formed in the side wall of the central valve block and is communicated with the unloading oil way, and outlets of the first overflow valve and the second overflow valve are communicated with the oil return port.
By adopting the technical scheme, in work, hydraulic oil in the unloading oil way flows out of the valve bank through the oil return port, and the convenience in use of the valve bank is improved.
Preferably: the side wall of the central valve block is provided with a first oil outlet, a second oil outlet and a third oil outlet, the first oil outlet and the second oil outlet are communicated with a third oil duct, the third oil outlet is communicated with a fourth oil duct, and the third oil outlet is communicated with an outlet of the one-way throttle valve.
Through adopting above-mentioned technical scheme, with the help of first oil-out, second oil-out and the third oil-out that sets up on the valve block to make the valves can communicate with a plurality of executive component simultaneously, and then help improving the work efficiency of valves.
In summary, the present application includes at least one of the following beneficial technical effects:
(1) by means of the first check valve and the first overflow valve which are arranged in parallel, and the second check valve and the second overflow valve, the pressure in the hydraulic pipeline is kept in a reasonable range, so that the damage of equipment is reduced, and the service life of the equipment is prolonged;
(2) with the help of the valve block and the first oil pipe and the second oil pipe which are detachably connected to the valve block, the use convenience of the unloading valve group is improved.
Drawings
Fig. 1 is a hydraulic schematic diagram mainly embodying a dual-pump unloading valve bank in the present embodiment;
FIG. 2 is a schematic view of the main structure of the valve block according to the present embodiment;
FIG. 3 is a schematic view of the present embodiment mainly showing the back structure of the valve block;
fig. 4 is a schematic view mainly showing a connection structure of both the first oil pipe and the second oil pipe and the valve block in the present embodiment.
Reference numerals: 1. a first oil passage; 11. a first check valve; 12. a first oil inlet; 13. a first overflow valve; 2. a second oil passage; 21. a second one-way valve; 22. a second oil inlet; 23. a second overflow valve; 3. a third oil passage; 31. a first oil outlet; 32. a second oil outlet; 4. an unloading oil way; 41. an oil return port; 5. a fourth oil passage; 51. a one-way throttle valve; 52. a third oil outlet; 6. a valve block; 61. a first oil pipe; 62. a second oil pipe; 7. an internal thread; 8. an external thread; 9. high-pressure seal ring.
Detailed Description
The present application is described in further detail below with reference to the accompanying drawings.
The embodiment of the application discloses a double-pump unloading valve bank. Referring to fig. 1, a first oil passage 1, a second oil passage 2, a third oil passage 3, and a relief oil passage 4 are included. The first oil passage 1 is connected in parallel with the second oil passage 2, and both the first oil passage 1 and the second oil passage 2 are communicated with the third oil passage 3.
During operation, the operator can control the hydraulic oil to flow into the third oil passage 3 from the first oil passage 1, can control the hydraulic oil to flow into the third oil passage 3 from the second oil passage 2, and can control the hydraulic oil to flow into the third oil passage 3 from the first oil passage 1 and the second oil passage 2 together.
The first oil path 1 is provided with a first one-way valve 11, an inlet of the first one-way valve 11 is communicated with a first oil inlet 12, and an outlet of the first one-way valve 11 is communicated with the third oil path 3. The first oil path 1 is also connected with a first overflow valve 13 in parallel, an inlet of the first overflow valve 13 is communicated with an outlet of the first check valve 11, and an outlet of the first overflow valve 13 is communicated with the unloading oil path 4.
The second oil path 2 is provided with a second check valve 21, an inlet of the second check valve 21 is communicated with a second oil inlet 22, an outlet of the second check valve 21 is communicated with the third oil path 3, the second oil path 2 is also connected with a second overflow valve 23 in parallel, an inlet of the second overflow valve 23 is communicated with an outlet of the first check valve 11, and an outlet of the second overflow valve 23 is communicated with the unloading oil path 4. One end of the unloading oil path 4, which is far away from the outlets of the first overflow valve 13 and the second overflow valve 23, is communicated with an oil return port 41.
During work, hydraulic oil flows into the third oil path 3 through the first oil path 1 and the second oil path 2 respectively, when the oil pressure in the first oil path 1 reaches the opening value of the first overflow valve 13, the first overflow valve 13 is opened, and the hydraulic oil flows into the unloading oil path 4 through the first overflow valve 13; when the oil pressure in the second oil path 2 reaches the opening value of the second overflow valve 23, the second overflow valve 23 is opened, and the hydraulic oil flows into the unloading oil path 4 through the second overflow valve 23; when the oil pressure in the third oil passage 3 reaches the opening value of the first relief valve 13 or the second relief valve 23, the first relief valve 13 or the second relief valve 23 is opened, and the hydraulic oil flows into the unloading oil passage 4 through the first relief valve 13 or the second relief valve 23.
The third oil path 3 is communicated with a first oil outlet 31 and a second oil outlet 32, the third oil path 3 is also connected with a fourth oil path 5, the fourth oil path 5 is provided with a one-way throttle valve 51, the inlet of the one-way throttle valve 51 is communicated with the third oil path 3, and the outlet of the one-way throttle valve 51 is communicated with a third oil outlet 52. The worker adjusts the flow rate of the hydraulic oil in the fourth oil passage 5 by adjusting the one-way throttle valve 51.
Referring to fig. 2, the dual-pump unloading valve group further includes a valve block 6, and the first oil path 1, the second oil path 2, the third oil path 3, the fourth oil path 5, the unloading oil path 4, the first check valve 11, the second check valve 21, the first overflow valve 13, the second overflow valve 23, and the check throttle valve 51 are all integrated on the valve block 6. The first oil inlet 12, the second oil inlet 22, the oil return port 41, the first oil outlet 31, the second oil outlet 32 and the third oil outlet 52 are all arranged on the side wall of the valve block 6. The first oil inlet 12, the second oil inlet 22 and the oil return port 41 are opened on the same side wall of the valve block 6, the first oil outlet 31 is opened on a side wall adjacent to the first oil inlet 12, and the second oil outlet 32 and the third oil outlet 52 are opened on a side wall opposite to the first oil inlet 12.
In the work, the staff integrates all hydraulic elements on valve block 6, helps improving the convenience that double pump unloading valves used.
Referring to fig. 3, a first oil pipe 61 is detachably fixed to the first oil inlet 12, and a second oil pipe 62 is opened to the second oil inlet 22. And the first oil inlet 12 and the second oil inlet 22 are both provided with internal threads 7, and the first oil pipe 61 and the second oil pipe 62 are both provided with external threads 8. The internal thread 7 is in threaded fit with the external thread 8. High-pressure sealing rings 9 are embedded between the first oil pipe 61 and the first oil inlet 12 and between the second oil pipe 62 and the second oil inlet 22.
In operation, the staff connects the two-pump unloading valve group with the oil tank by the first oil pipe 61 and the second oil pipe 62.
The implementation principle of the double-pump unloading valve bank in the embodiment of the application is as follows: during work, a worker can control the hydraulic oil to flow into the third oil path 3 from the first oil path 1, can also control the hydraulic oil to flow into the third oil path 3 from the second oil path 2, and can also control the hydraulic oil to flow into the third oil path 3 from the first oil path 1 and the second oil path 2 together; when the oil pressure in the first oil path 1 reaches the opening value of the first overflow valve 13, the first overflow valve 13 is opened, and the hydraulic oil flows into the unloading oil path 4 through the first overflow valve 13; when the oil pressure in the second oil path 2 reaches the opening value of the second overflow valve 23, the second overflow valve 23 is opened, and the hydraulic oil flows into the unloading oil path 4 through the second overflow valve 23; when the oil pressure in the third oil passage 3 reaches the opening value of the first relief valve 13 or the second relief valve 23, the first relief valve 13 or the second relief valve 23 is opened, and the hydraulic oil flows into the unloading oil passage 4 through the first relief valve 13 or the second relief valve 23.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A double-pump unloading valve group is characterized by comprising a first oil way (1), a second oil way (2), a third oil way (3) and an unloading oil way (4), wherein the first oil way (1) is connected with the second oil way (2) in parallel, the first oil way (1) and the second oil way (2) are both communicated with the third oil way (3), a first one-way valve (11) is arranged on the first oil way (1), the outlet of the first one-way valve (11) is communicated with the third oil way (3), a first overflow valve (13) is further connected with the first oil way (1) in parallel, the inlet of the first overflow valve (13) is communicated with the outlet of the first one-way valve (11), the outlet of the first overflow valve (13) is communicated with the unloading oil way (4), a second one-way valve (21) is arranged on the second oil way (2), and the outlet of the second one-way valve (21) is communicated with the third oil way (3), and a second overflow valve (23) is also connected in parallel on the second oil path (2), the inlet of the second overflow valve (23) is communicated with the outlet of the first check valve (11), and the outlet of the second overflow valve (23) is communicated with the unloading oil path (4).
2. A double-pump unloading valve group according to claim 1, wherein a fourth oil path (5) is further connected to the third oil path (3), a one-way throttle valve (51) is arranged on the fourth oil path (5), and an inlet of the one-way throttle valve (51) is communicated with the third oil path (3).
3. The double-pump unloading valve bank according to claim 2, characterized by further comprising a valve block (6), wherein the first oil path (1), the second oil path (2), the third oil path (3), the fourth oil path (5), the unloading oil path (4), the first check valve (11), the second check valve (21), the first overflow valve (13), the second overflow valve (23) and the one-way throttle valve (51) are integrated on the valve block (6).
4. The dual-pump unloading valve group according to claim 3, wherein a first oil inlet (12) and a second oil inlet (22) are formed in a side wall of the valve block (6), the first oil inlet (12) is communicated with a first oil passage, the second oil inlet (22) is communicated with a second oil passage, a first oil pipe (61) is detachably fixed to the first oil inlet (12), and a second oil pipe (62) is detachably fixed to the second oil inlet (22).
5. The double-pump unloading valve bank according to claim 4, wherein the first oil inlet (12) and the second oil inlet (22) are both provided with internal threads (7), the first oil pipe (61) and the second oil pipe (62) are both provided with external threads (8), the first oil port is in threaded fit with the first oil pipe (61), and the second oil port is in threaded fit with the second oil pipe (62).
6. A double pump unloading valve group according to claim 5, wherein high pressure sealing rings (9) are arranged between the first oil pipe (61) and the first oil inlet (12) and between the second oil pipe (62) and the second oil inlet (22).
7. The double-pump unloading valve group according to claim 3, wherein an oil return port (41) is formed in a side wall of the valve block (6), the oil return port (41) is communicated with the unloading oil passage (4), and outlets of the first overflow valve (13) and the second overflow valve (23) are communicated with the oil return port (41).
8. The double-pump unloading valve group according to claim 3, wherein a first oil outlet (31), a second oil outlet (32) and a third oil outlet (52) are formed in the side wall of the valve block (6), the first oil outlet (31) and the second oil outlet (32) are both communicated with a third oil channel, the third oil outlet (52) is communicated with a fourth oil channel (5), and the third oil outlet (52) is communicated with an outlet of a one-way throttle valve (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021439763.3U CN212838668U (en) | 2020-07-20 | 2020-07-20 | Double-pump unloading valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021439763.3U CN212838668U (en) | 2020-07-20 | 2020-07-20 | Double-pump unloading valve group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212838668U true CN212838668U (en) | 2021-03-30 |
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ID=75119266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021439763.3U Active CN212838668U (en) | 2020-07-20 | 2020-07-20 | Double-pump unloading valve group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212838668U (en) |
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2020
- 2020-07-20 CN CN202021439763.3U patent/CN212838668U/en active Active
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