CN207111594U - Hydraulic crawler excavator guide's hydraulic pressure pre-heating system - Google Patents
Hydraulic crawler excavator guide's hydraulic pressure pre-heating system Download PDFInfo
- Publication number
- CN207111594U CN207111594U CN201721053335.5U CN201721053335U CN207111594U CN 207111594 U CN207111594 U CN 207111594U CN 201721053335 U CN201721053335 U CN 201721053335U CN 207111594 U CN207111594 U CN 207111594U
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- mouths
- pilot valve
- branching block
- valve
- connection
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system, including guide oil source block, hydraulic oil container, soil-shifting pilot valve, right handles pilot valve, feet pilot valve, left handle pilot valve, preheating branching block, fuel feeding branching block and oil return branching block；Guide oil source block is connected with preheating branching block, by being connected after shunting with the threeway on each pilot valve；Fuel feeding branching block is connected with the threeway on each pilot valve, is connected after collecting with guide oil source block；Oil return branching block is connected with the T mouths of each pilot valve, is connected after collecting with hydraulic oil container.The utility model can be under excavator idling mode, preheat leading hydraulic system, in this way, even under extremely cold environment, ensure that the oil temperature in pilot system is firm and rise, avoid pilot valve from being worked under extreme use condition, effectively the sealing elements therein premature failure of pilot valve is avoided to damage, reliability is improved, reduces maintenance cost, extends machine life.
Description
Technical field
It the utility model is related to excavator field, and in particular to a kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system.
Background technology
Hydraulic crawler excavator pre- hot hydraulic system of need of work under extremely cold environment, it is close if being not reaching to suitable temperature
The sealing effectiveness of sealing can be affected, and reduce its life-span, or even damage oil leak.Conventional hydraulic system warm is：Hair
Excavator is in holding state after motivation starts, and hydraulic oil returns to fuel tank after reaching main valve middle position off-load by main pump, herein mistake
Cheng Zhong, hydraulic oil is dammed by main valve produces heat come heating system, so as to reach the effect of preheating.And during this, follow
The hydraulic oil of ring has only passed through main pump, main valve, not over pilot system, only operates excavator action, pilot system just meeting
It is preheated.And now excavator action is must to make to produce the larger temperature difference inside pilot valve, the failure of valve interior sealing element is lured into,
Its sealing effectiveness is destroyed, causes the later stage to damage oil leak, reduces reliability, increases maintenance cost.
The content of the invention
In view of the above-mentioned problems of the prior art, the utility model provides a kind of hydraulic crawler excavator guide hydraulic pressure preheating system
System, can preheat leading hydraulic system under excavator idling mode, it is worked under suitable oil temperature, improve reliability,
Increase the service life.
To achieve these goals, the technical solution adopted in the utility model is：
A kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system, including guide oil source block, hydraulic oil container, soil-shifting pilot valve, the right side
Handle pilot valve, feet pilot valve, left handle pilot valve, preheating branching block, fuel feeding branching block and oil return branching block；It is described to bulldoze first
Pilot valve, right handles pilot valve, the oil inlet of feet pilot valve and left handle pilot valve are equipped with a threeway；The guide oil source block
It is connected with preheating branching block, by being connected after shunting with the threeway on each pilot valve；The fuel feeding branching block and each guide
Threeway connection on valve, is connected after collecting with guide oil source block；The oil return branching block is connected with the T mouths of each pilot valve, is converged
It is connected after collection with hydraulic oil container.
Preferably, the guide oil source block includes throttle orifice, filter, pressure-reducing valve, pressure measuring tie-in, accumulator, unidirectional
Valve, safety overflow valve, security solenoid valve and the high low-speed solenoid valve of walking；The guide oil source block be provided with P mouths, A mouths, B mouths, C mouths,
BV mouths, PR mouths, T mouths；The entrance connection of the P mouths and throttle orifice, the outlet of the throttle orifice are connected with the entrance of filter again,
The outlet of the filter and the 1 of pressure-reducing valve mouthful of connection；2 mouthfuls of the pressure-reducing valve, A mouths, B mouths, 1 mouthful of check valve and walking it is high
It is interconnected between 3 mouthfuls of low-speed solenoid valve；2 mouthfuls of the check valve, C mouths, 1 mouthful of safety overflow valve and security solenoid valve
It is interconnected between 3 mouthfuls；3 mouthfuls of the pressure-reducing valve, T mouths, 2 mouthfuls of safety overflow valve, 1 mouthful of security solenoid valve and walking height
It is interconnected between 1 mouthful of fast magnetic valve.
Preferably, the outside main pump of P mouths connection in the guide oil source block；T mouths connection in the guide oil source block
Hydraulic oil container；Connected outside PR mouths in the guide oil source block with the control port of running motor speed change；The pilot control
It is connected outside A mouths in block with pressure measuring tie-in, for measuring the pressure size of pilot system；C mouths in the guide oil source block
Outside is connected with accumulator, can provide pilot pressure oil uninstalling system pressure after excavator shutdown, while can also stablize
The pressure of pilot system in course of normal operation.
Preferably, the B mouths in the guide oil source block with preheat branching block R1 mouths be connected, by after shunting with it is each
The P2 mouths connection of threeway on pilot valve；The R5 mouths of the preheating branching block are connected with the P1 mouths of threeway on soil-shifting pilot valve, in advance
The R4 mouths of thermal shunt block are connected with the P1 mouths of threeway on right handles pilot valve, preheat the R3 mouths of branching block and threeway on feet pilot valve
P1 mouths connection, preheat the R2 mouths of branching block and be connected with the P1 mouths of threeway on left handle pilot valve.
Preferably, the fuel feeding branching block is connected with the P1 mouths of the threeway on each pilot valve；
The P1 mouths of threeway on the soil-shifting pilot valve are connected with the P5 mouths of fuel feeding branching block, on the right handles pilot valve
The P1 mouths of threeway are connected with the P4 mouths of fuel feeding branching block, the P1 mouths of the threeway on the feet pilot valve and the P3 mouths of fuel feeding branching block
Connect, the P1 mouths of the threeway on the left handle pilot valve close with the P2 mouths of fuel feeding branching block with being connected by fuel feeding branching block
After stream collects, the P1 mouths on fuel feeding branching block are connected with the BV mouths in guide oil source block.
Preferably, the T mouths on the soil-shifting pilot valve are connected with the T5 mouths of oil return branching block, the right handles pilot valve
On T mouths be connected with the T4 mouths of oil return branching block, the T mouths on the feet pilot valve are connected with the T3 mouths of oil return branching block, described
T mouths on left handle pilot valve are with the T2 mouths of oil return branching block with being connected, after collecting by oil return branching block interflow, oil return shunting
T1 mouths on block are connected with hydraulic oil container.
Preferably, there are P1 mouths and P2 mouths in the threeway, and P2 with P1 mouths connect.
The utility model beneficial effect：
Under excavator idling mode, the pressure oil after guide oil source block pressure-reducing valve is heated by preheating pipeline
Leading hydraulic system.In this way, even under extremely cold environment, ensure that the oil temperature in pilot system is firm and rise, keep away
Exempt from pilot valve to work under extreme use condition, effectively avoid the sealing elements therein of pilot valve from damaging, improve reliability, drop
Low maintenance cost, extend machine life.In this way, while accelerate the rising of complete machine hydraulic oil temperature, improve complete machine initial stage
Operating characteristics, shorten warm-up period, reduce energy consumption, save time and cost.
Brief description of the drawings
Fig. 1 is hydraulic principle schematic diagram of the present utility model；
In figure：1st, guide oil source block, 1-1, throttle orifice, 1-2, filter, 1-3, pressure-reducing valve, 1-4, pressure measuring tie-in, 1-5,
Accumulator, 1-6, check valve, 1-7, safety overflow valve, 1-8, security solenoid valve, 1-9, the high low-speed solenoid valve of walking, 2, hydraulic oil
Case, 3, threeway, 4, soil-shifting pilot valve, 5, right handles pilot valve, 6, feet pilot valve, 7, left handle pilot valve, 8, preheating branching block,
9th, fuel feeding branching block, 10, oil return branching block.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described by specific embodiment.
As shown in figure 1, a kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system, including guide oil source block 1, hydraulic oil container 2, push away
Native pilot valve 4, right handles pilot valve 5, feet pilot valve 6, left handle pilot valve 7, preheating branching block 8, fuel feeding branching block 9, oil return
Branching block 10；One is equipped with the oil inlet of soil-shifting pilot valve 4, right handles pilot valve 5, feet pilot valve 6 and left handle pilot valve 7
Individual threeway 3.
Guide oil source block 1 includes throttle orifice 1-1, filter 1-2, pressure-reducing valve 1-3, pressure measuring tie-in 1-4, accumulator 1-5, list
To valve 1-6, safety overflow valve 1-7, security solenoid valve 1-8 and the high low-speed solenoid valve 1-9 of walking；Guide oil source block 1 be provided with P mouths,
A mouths, B mouths, C mouths, BV mouths, PR mouths, T mouths；P mouths are connected with throttle orifice 1-1 entrance, throttle orifice 1-1 outlet and and filter
1-2 entrance is connected, and filter 1-2 outlet is connected with 1 mouthful of pressure-reducing valve 1-3；2 mouthfuls of pressure-reducing valve 1-3, A mouths, B mouths, unidirectionally
It is interconnected between 1 mouthful and 3 mouthfuls of the high low-speed solenoid valve 1-9 of walking of valve 1-6；2 mouthfuls of check valve 1-6, C mouths, safety overflow
It is interconnected between 1 mouthful and 3 mouthfuls of security solenoid valve 1-8 of valve 1-7；3 mouthfuls of pressure-reducing valve 1-3, T mouths, safety overflow valve 1-7
It is interconnected between 2 mouthfuls, 1 mouthful of security solenoid valve 1-8 and 1 mouthful of the high low-speed solenoid valve 1-9 of walking.
The outside main pump of P mouths connection in guide oil source block 1；T mouths connection hydraulic oil container 2 in guide oil source block 1；Guide oil
Connected outside PR mouths in source block 1 with the control port of running motor speed change；Connect outside A mouths in guide oil source block 1 with pressure measurement
Head 1-4 connections, the pressure size of pilot system can be measured；It is connected outside C mouths in guide oil source block 1 with accumulator 1-5, can
To provide pilot pressure oil uninstalling system pressure after excavator is shut down, while guide in course of normal operation can also be stablized and be
The pressure of system.
Guide's hydraulic pressure pre-heating system takes pressure-reducing valve 1-3 and list of the hydraulic oil of hydraulic fluid port B mouths inside guide oil source block 1
Hydraulic oil between valve 1-6, i.e.,：B mouths in guide oil source block 1 and 2 mouthfuls of 1 mouthful and check valve 1-6 of pressure-reducing valve 1-3 it is mutual
Connection, guide oil source block B mouths are connected with preheating the R1 mouths of branching block 8, pass through the P2 after shunting with the threeway 3 on each pilot valve
Mouth connection；The R5 mouths of preheating branching block 8 are connected, preheated R4 mouths and the right side of branching block 8 with the P1 mouths of threeway 3 on soil-shifting pilot valve 4
The P1 mouths connection of threeway 3 in handle pilot valve 5, the R3 mouths of preheating branching block 8 are connected with the P1 mouths of threeway 3 on feet pilot valve 6, are pre-
The R2 mouths of thermal shunt block 8 are connected with the P1 mouths of threeway 3 on left handle pilot valve 7, and threeway 3 is connected with each pilot valve oil inlet P.
Fuel feeding branching block 9 is connected with the P1 mouths of the threeway 3 on each pilot valve；The P1 mouths of threeway 3 on soil-shifting pilot valve 4
Be connected with the P5 mouths of fuel feeding branching block 9, on right handles pilot valve 5 the P1 mouths of threeway 3 be connected with the P4 mouths of fuel feeding branching block 9, pin
The P1 mouths of threeway 3 on pilot valve 6 are connected with the P3 mouths of fuel feeding branching block 9, the P1 mouths of threeway 3 on left handle pilot valve 7 with
The P2 mouths of fuel feeding branching block 9 are with being connected, after collecting by the interflow of fuel feeding branching block 9, P1 mouths and guide oil on fuel feeding branching block 9
BV mouths connection in source block 1.
T mouths on each pilot valve are connected with oil return branching block 10；T mouths and oil return branching block 10 on soil-shifting pilot valve 4
The connection of T5 mouths, the T mouths on right handles pilot valve 5 be connected with the T4 mouths of oil return branching block 10, the T mouths on feet pilot valve 6 and time
The T3 mouths connection of oily branching block 10, the T mouths on left handle pilot valve 7 are with the T2 mouths of oil return branching block 10 with being connected, by oil return
After the interflow of branching block 10 is collected, the T1 mouths on oil return branching block 10 are connected with hydraulic oil container 2.
The course of work：
After engine start, excavator is in holding state, and security solenoid valve 1-8 no powers are in the normal state, i.e., 1 mouthful with
2 mouthfuls of UNICOMs.The pressure oil of outside main pump is after throttle orifice 1-1 and pressure-reducing valve 1-3 inside guide oil source block, because throttling is made
With heat is produced, hydraulic fluid temperature raises.Pressure oil by heating flows to the R1 mouths of preheating branching block 8 by B mouths, through undue
Reach the P2 mouths in the threeway 3 being connected with each pilot valve P mouths after stream, P2 and P1 mouths UNICOM in threeway 3, on each pilot valve
The P1 mouths in threeway 3 being connected and the UNICOM of fuel feeding branching block 9, the hydraulic oil after fuel feeding branching block 9 collects reach guide
The BV mouths of oil sources block, now security solenoid valve 1-8 be in the normal state, hydraulic oil eventually passes through oil return oil duct T mouths and returns to hydraulic oil container
2.As can be seen that excavator is when be in holding state during from this, hydraulic oil forms a kind of circulation of flowing, therefore the liquid of heating
Force feed can heat whole leading hydraulic system by above-mentioned this circulation, and this process is not required to the participation of very important person.Work as peace
Full magnetic valve 1-8 is powered when having signal, and security solenoid valve 1-8 switchs to right position working condition, and its 2 mouthfuls connect with 3 mouthfuls, as described above
The described hydraulic oil after fuel feeding branching block 9 collects, by 3 mouthfuls of security solenoid valve 1-8 and check valve 1-6 UNICOMs, this
When whole leading hydraulic system form pressure circuit, each pilot valve can be operated by commutation process and running motor speed
Carry out conventional control.
Under excavator idling mode, the pressure oil after guide oil source block pressure-reducing valve is heated by preheating pipeline
Leading hydraulic system.In this way, even under extremely cold environment, ensure that the oil temperature in pilot system is firm and rise, keep away
Exempt from pilot valve to work under extreme use condition, effectively avoid the sealing elements therein of pilot valve from damaging, improve reliability, drop
Low maintenance cost, extend machine life.In this way, while accelerate the rising of complete machine hydraulic oil temperature, improve complete machine initial stage
Operating characteristics, shorten warm-up period, reduce energy consumption, save time and cost.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied
Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.
Claims (7)
- A kind of 1. hydraulic crawler excavator guide hydraulic pressure pre-heating system, it is characterised in that：Including guide oil source block（1）, hydraulic oil container （2）, soil-shifting pilot valve（4）, right handles pilot valve（5）, feet pilot valve（6）, left handle pilot valve（7）, preheating branching block（8）、 Fuel feeding branching block（9）With oil return branching block（10）；The soil-shifting pilot valve（4）, right handles pilot valve（5）, feet pilot valve（6）With left handle pilot valve（7）Oil inlet it is equal Provided with a threeway（3）；The guide oil source block（1）With preheating branching block（8）Connection, by after shunting with the threeway on each pilot valve（3）Even Connect；The fuel feeding branching block（9）With the threeway on each pilot valve（3）Connection, collect rear and guide oil source block（1）Connection；The oil return branching block（10）It is connected with the T mouths of each pilot valve, collects rear and hydraulic oil container（2）Connection.
- 2. hydraulic crawler excavator guide hydraulic pressure pre-heating system according to claim 1, it is characterised in that：The guide oil source block （1）Including throttle orifice（1-1）, filter（1-2）, pressure-reducing valve（1-3）, pressure measuring tie-in（1-4）, accumulator（1-5）, check valve （1-6）, safety overflow valve（1-7）, security solenoid valve（1-8）With high low-speed solenoid valve of walking（1-9）；The guide oil source block（1）Provided with P mouths, A mouths, B mouths, C mouths, BV mouths, PR mouths, T mouths；The P mouths and throttle orifice（1-1）Entrance connection, the throttle orifice（1-1）Outlet again and filter（1-2）Entrance It is connected, the filter（1-2）Outlet and pressure-reducing valve（1-3）1 mouthful connection；The pressure-reducing valve（1-3）2 mouthfuls, A mouths, B mouths, check valve（1-6）1 mouthful and the high low-speed solenoid valve of walking（1-9）3 mouthfuls Between be interconnected；The check valve（1-6）2 mouthfuls, C mouths, safety overflow valve（1-7）1 mouthful and security solenoid valve（1-8）3 mouthfuls between phase It is intercommunicated；The pressure-reducing valve（1-3）3 mouthfuls, T mouths, safety overflow valve（1-7）2 mouthfuls, security solenoid valve（1-8）1 mouthful and walking High low-speed solenoid valve（1-9）1 mouthful between be interconnected.
- 3. hydraulic crawler excavator guide hydraulic pressure pre-heating system according to claim 2, it is characterised in that：The guide oil source block（1）In the outside main pump of P mouths connection；The guide oil source block（1）In T mouths connection hydraulic oil container （2）；The guide oil source block（1）In PR mouths outside connected with the control port of running motor speed change；The guide oil source block （1）In A mouths outside and pressure measuring tie-in（1-4）Connection, for measuring the pressure size of pilot system；The guide oil source block （1）In C mouths outside and accumulator（1-5）Connection, pilot pressure oil uninstalling system pressure can be provided after excavator shutdown, The pressure of pilot system in course of normal operation can also be stablized simultaneously.
- 4. hydraulic crawler excavator guide hydraulic pressure pre-heating system according to claim 1, it is characterised in that：The guide oil source block （1）In B mouths with preheating branching block（8）R1 mouths connection, by after shunting with the threeway on each pilot valve（3）P2 mouths connect Connect；The preheating branching block（8）R5 mouths and soil-shifting pilot valve（4）The P1 mouths connection of upper threeway, preheats branching block（8）R4 Mouth and right handles pilot valve（5）The P1 mouths connection of upper threeway, preheats branching block（8）R3 mouths and feet pilot valve（6）Upper threeway P1 mouths connect, and preheat branching block（8）R2 mouths and left handle pilot valve（7）The P1 mouths connection of upper threeway.
- 5. hydraulic crawler excavator guide hydraulic pressure pre-heating system according to claim 1, it is characterised in that：The fuel feeding branching block （9）With the threeway on each pilot valve（3）P1 mouths connection；The soil-shifting pilot valve（4）On threeway P1 mouths and fuel feeding branching block（9）P5 mouths connection, the right handles pilot valve （5）The P1 mouths of upper threeway and fuel feeding branching block（9）P4 mouths connection, the feet pilot valve（6）On threeway P1 mouths and fuel feeding Branching block（9）P3 mouths connection, the left handle pilot valve（7）On threeway P1 mouths and fuel feeding branching block（9）P2 mouths with Connection, by fuel feeding branching block（9）After interflow is collected, fuel feeding branching block（9）On P1 mouths and guide oil source block（1）On BV mouths Connection.
- 6. hydraulic crawler excavator guide hydraulic pressure pre-heating system according to claim 1, it is characterised in that：The soil-shifting pilot valve （4）On T mouths and oil return branching block（10）T5 mouths connection, the right handles pilot valve（5）On T mouths and oil return branching block （10）T4 mouths connection, the feet pilot valve（6）On T mouths and oil return branching block（10）The connection of T3 mouths, the left handle is first Pilot valve（7）On T mouths and oil return branching block（10）T2 mouths with being connected, by oil return branching block（10）After interflow is collected, oil return Branching block（10）On T1 mouths and hydraulic oil container（2）Connection.
- 7. hydraulic crawler excavator guide hydraulic pressure pre-heating system according to claim 1, it is characterised in that：The threeway（3）On There are P1 mouths and P2 mouths, and P2 with P1 mouths connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721053335.5U CN207111594U (en) | 2017-08-22 | 2017-08-22 | Hydraulic crawler excavator guide's hydraulic pressure pre-heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721053335.5U CN207111594U (en) | 2017-08-22 | 2017-08-22 | Hydraulic crawler excavator guide's hydraulic pressure pre-heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207111594U true CN207111594U (en) | 2018-03-16 |
Family
ID=61570395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721053335.5U Withdrawn - After Issue CN207111594U (en) | 2017-08-22 | 2017-08-22 | Hydraulic crawler excavator guide's hydraulic pressure pre-heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207111594U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288958A (en) * | 2017-08-22 | 2017-10-24 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system and pre-heating mean |
-
2017
- 2017-08-22 CN CN201721053335.5U patent/CN207111594U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107288958A (en) * | 2017-08-22 | 2017-10-24 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator guide hydraulic pressure pre-heating system and pre-heating mean |
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Legal Events
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180316 Effective date of abandoning: 20230418 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20180316 Effective date of abandoning: 20230418 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |