CN204921522U - Excavator decompression throttle system - Google Patents
Excavator decompression throttle system Download PDFInfo
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- CN204921522U CN204921522U CN201520701811.4U CN201520701811U CN204921522U CN 204921522 U CN204921522 U CN 204921522U CN 201520701811 U CN201520701811 U CN 201520701811U CN 204921522 U CN204921522 U CN 204921522U
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- way valve
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Abstract
The utility model discloses a parallelly connected with first damping hole and first check valve respectively after excavator decompression throttle system, first relief pressure valve establish ties with first orifice, establish ties in first overflow valve and first damping hole, and the spring end control mouthful connection of first relief pressure valve is between first overflow valve and first damping hole, and first overflow valve, first relief pressure valve, first damping hole, first orifice and first check valve constitute decompression choke valve I jointly, parallelly connected with second damping hole and second check valve respectively after the second relief pressure valve is established ties with the second orifice, establish ties in second overflow valve and second damping hole, and the spring end control mouthful connection of second relief pressure valve is between second overflow valve and second damping hole, and second overflow valve, second relief pressure valve, second damping hole, second orifice, second check valve constitute decompression choke valve II jointly. The beneficial effects are that can reduce pressure and flow through this decompression throttle entering execute component of system, the dependable flow does not produce undulantly along with the change of load.
Description
Technical field
The utility model relates to a kind of excavator decompression throttle system, belongs to hydraulic system pressure and Flow-rate adjustment technical field.
Background technique
In minus flow hydraulic system, when system pressure and flow all lower than excavator of the working pressure needed for executive component and flow, need to adjust the pressure of excavator and flow to meet the requirement of executive component.Pressure regulative mode is relief valve in parallel or series connection one way pressure-reducing valve on pressure duct, and Flow-rate adjustment mode is that the openings of sizes by controlling pilot handle realizes.The shortcoming of this mode is: when adopting relief valve to reduce the pressure of a certain branch road, when the multiple executive component of excavator works simultaneously, because the pressure oil between each executive component communicates, relief valve can make the pressure of other executive component all lower.When adopting one way pressure-reducing valve to reduce the pressure of a certain branch road, then can not produce above-mentioned phenomenon.But, be use relief valve or one way pressure-reducing valve all can not adjust flux.Excavator is at invariable power MODE of operation, and along with the change of load, flow system flow is in continuous change, executive component constant flow is entered to keep, constantly must adjust the openings of sizes of pilot handle, have very high requirement to operation skill, easily make operator produce fatigue.
Summary of the invention
For above-mentioned prior art Problems existing, the utility model provides a kind of excavator to reduce pressure throttle system, when the system pressure of excavator and flow are greater than pressure required for executive component and flow, reduces the pressure and the flow that enter executive component.
To achieve these goals, the technical solution adopted in the utility model is: a kind of excavator decompression throttle system, comprises the first relief valve, the first reduction valve, the first damping hole, first segment discharge orifice, the first one-way valve, the second relief valve, the second reduction valve, the second damping hole, second section discharge orifice, the second one-way valve; First reduction valve is in parallel with the first damping hole and the first one-way valve respectively after connecting with first segment discharge orifice, first relief valve is connected with the first damping hole, the spring terminal of the first reduction valve controls mouth and is connected between the first relief valve and the first damping hole, and the first relief valve, the first reduction valve, the first damping hole, first segment discharge orifice and the first one-way valve form pressure reducing throttle valve I jointly; Second reduction valve is in parallel with the second damping hole and the second one-way valve respectively after connecting with second section discharge orifice, second relief valve is connected with the second damping hole, the spring terminal of the second reduction valve controls mouth and is connected between the second relief valve and the second damping hole, and the second relief valve, the second reduction valve, the second damping hole, second section discharge orifice, the second one-way valve form pressure reducing throttle valve II jointly.
Further, the utility model also comprises the 3rd one-way valve, the 4th one-way valve and the 3rd relief valve, and the outlet of pressure reducing throttle valve I divides two-way, and a road connects one end oil pocket of executive component, and another road connects the 3rd one-way valve; The outlet of pressure reducing throttle valve II is divided into two-way, and a road connects the other end oil pocket of executive component, and another road connects the 4th one-way valve; 3rd one-way valve and the 4th one-way valve differential concatenation, the outlet between the 3rd one-way valve with the 4th one-way valve is connected the 3rd relief valve, and the first relief valve is connected at T mouth with the 3rd relief valve.
Described pressure reducing throttle valve I, pressure reducing throttle valve II, the 3rd one-way valve, the 4th one-way valve and the 3rd relief valve are integrated in a valve block.
The beneficial effects of the utility model are: when the multiple action of excavator works simultaneously, the pressure and flow that enter executive component can be reduced, guaranteed flow does not produce fluctuation with the change of load, the opening of pilot handle only need be transferred to maximum by operator in operation, the opening of pilot handle need not be adjusted the moment, simple to operate; And the utility model can ensure that the pressure of other executive component is unaffected while use.
Accompanying drawing explanation
Fig. 1 is the utility model system connection diagram.
In figure: 1, the first relief valve, the 2, first reduction valve, the 3, first damping hole, 4, first segment discharge orifice, the 5, first one-way valve, the 6, the 3rd one-way valve, 7, the 4th one-way valve, the 8, the 3rd relief valve, 9, second section discharge orifice, 10, the second one-way valve, the 11, second damping hole, the 12, second reduction valve, 13, the second relief valve, 14, pressure reducing throttle valve I, 15, pressure reducing throttle valve II, 16 selector valve.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1: the utility model comprises the first relief valve 1, first reduction valve 2, first damping hole 3, first segment discharge orifice 4, first one-way valve 5, second relief valve 13, second reduction valve 12, second damping hole 11, second section discharge orifice 9, second one-way valve 10; First reduction valve 2 is in parallel with the first damping hole 3 and the first one-way valve 5 respectively after connecting with first segment discharge orifice 4, first relief valve 1 is connected with the first damping hole 3, the spring terminal of the first reduction valve 2 controls mouth and is connected between the first relief valve 1 and the first damping hole 3, and the first relief valve 1, first reduction valve 2, first damping hole 3, first segment discharge orifice 4 and the first one-way valve 5 form pressure reducing throttle valve I 14 jointly; Second reduction valve 12 is in parallel with the second damping hole 11 and the second one-way valve 10 respectively after connecting with second section discharge orifice 9, second relief valve 13 is connected with the second damping hole 11, the spring terminal of the second reduction valve 12 controls mouth and is connected between the second relief valve 13 and the second damping hole 11, and the second relief valve 13, second reduction valve 12, second damping hole 11, second section discharge orifice 9, second one-way valve 10 form pressure reducing throttle valve II 15 jointly.
When the logical oil in the left position of selector valve 16, the oil-feed of B mouth, the oil return of A mouth, the first reduction valve 2 is connected with first segment discharge orifice 4, then in parallel with the first damping hole 3, and these three valves are combined, and realize the flow control to executive component.The flow entering executive component is regulated by the opening area of adjustment first segment discharge orifice 4; The effect of the first relief valve 1 ensures that the pressure of A1 mouth is not more than the rated pressure of executive component; The oil of A2 mouth flows back to fuel tank by the second one-way valve 10 and selector valve 16.When the logical oil in the right position of selector valve 16, the oil-feed of A mouth, the oil return of B mouth, it is same that principle and the left position of selector valve 16 lead to oil phase.
The utility model can also comprise the 3rd one-way valve 6, the 4th one-way valve 7 and the 3rd relief valve 8, and the outlet of pressure reducing throttle valve I 14 divides two-way, and a road connects one end oil pocket of executive component, and another road connects the 3rd one-way valve 6; The outlet of pressure reducing throttle valve II 15 is divided into two-way, and a road connects the other end oil pocket of executive component, and another road connects the 4th one-way valve 7; 3rd one-way valve 6 and the 4th one-way valve 7 differential concatenation, outlet between 3rd one-way valve 6 with the 4th one-way valve 7 is connected the 3rd relief valve 8, first relief valve 1 is connected at T mouth with the 3rd relief valve 8, setting in this way, the hydraulic shock produced when executive component transships suddenly can be absorbed, ensure the safety of executive component, when certain element fault causes the pressure in executive component to discharge, the pressure of executive component two ends oil pocket also can be unloaded by the pressure reducing the 3rd relief valve 8.
Pressure reducing throttle valve I 14, pressure reducing throttle valve II 15, the 3rd one-way valve 6, the 4th one-way valve 7 and the 3rd relief valve 8 are integrated in a valve block, and structure is compacter, is also convenient to follow-up I&M.
Claims (3)
1. an excavator decompression throttle system, is characterized in that comprising the first relief valve (1), the first reduction valve (2), the first damping hole (3), first segment discharge orifice (4), the first one-way valve (5), the second relief valve (13), the second reduction valve (12), the second damping hole (11), second section discharge orifice (9), the second one-way valve (10), first reduction valve (2) is in parallel with the first damping hole (3) and the first one-way valve (5) respectively after connecting with first segment discharge orifice (4), first relief valve (1) is connected with the first damping hole (3), the spring terminal of the first reduction valve (2) controls mouth and is connected between the first relief valve (1) and the first damping hole (3), and the first relief valve (1), the first reduction valve (2), the first damping hole (3), first segment discharge orifice (4) and the first one-way valve (5) form pressure reducing throttle valve I (14) jointly, second reduction valve (12) is in parallel with the second damping hole (11) and the second one-way valve (10) respectively after connecting with second section discharge orifice (9), second relief valve (13) is connected with the second damping hole (11), the spring terminal of the second reduction valve (12) controls mouth and is connected between the second relief valve (13) and the second damping hole (11), second relief valve (13), second reduction valve (12), second damping hole (11), second section discharge orifice (9), second one-way valve (10) forms pressure reducing throttle valve II (15) jointly, pressure reducing throttle valve I (14) is connected with one end of executive component, pressure reducing throttle valve II (15) is connected with the other end of executive component.
2. a kind of excavator decompression throttle system according to claim 1, it is characterized in that, also comprise the 3rd one-way valve (6), the 4th one-way valve (7) and the 3rd relief valve (8), the outlet of pressure reducing throttle valve I (14) divides two-way, one tunnel connects one end oil pocket of executive component, and another road connects the 3rd one-way valve (6); The outlet of pressure reducing throttle valve II (15) is divided into two-way, and a road connects the other end oil pocket of executive component, and another road connects the 4th one-way valve (7); 3rd one-way valve (6) and the 4th one-way valve (7) differential concatenation, the outlet between the 3rd one-way valve (6) with the 4th one-way valve (7) is connected the 3rd relief valve (8), and the first relief valve (1) is connected at T mouth with the 3rd relief valve (8).
3. a kind of excavator decompression throttle system according to claim 2, it is characterized in that, described pressure reducing throttle valve I (14), pressure reducing throttle valve the II (15), the 3rd one-way valve (6), the 4th one-way valve (7) and the 3rd relief valve (8) are integrated in a valve block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520701811.4U CN204921522U (en) | 2015-09-11 | 2015-09-11 | Excavator decompression throttle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520701811.4U CN204921522U (en) | 2015-09-11 | 2015-09-11 | Excavator decompression throttle system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204921522U true CN204921522U (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520701811.4U Active CN204921522U (en) | 2015-09-11 | 2015-09-11 | Excavator decompression throttle system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204921522U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564877A (en) * | 2014-12-15 | 2015-04-29 | 徐州徐工挖掘机械有限公司 | Pressure reducing and throttling system for excavators |
-
2015
- 2015-09-11 CN CN201520701811.4U patent/CN204921522U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564877A (en) * | 2014-12-15 | 2015-04-29 | 徐州徐工挖掘机械有限公司 | Pressure reducing and throttling system for excavators |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |