CN205744644U - Lifting machine decompression lifting loop - Google Patents
Lifting machine decompression lifting loop Download PDFInfo
- Publication number
- CN205744644U CN205744644U CN201620396992.9U CN201620396992U CN205744644U CN 205744644 U CN205744644 U CN 205744644U CN 201620396992 U CN201620396992 U CN 201620396992U CN 205744644 U CN205744644 U CN 205744644U
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- CN
- China
- Prior art keywords
- relief valve
- valve
- fuel tank
- decompression
- branch road
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of lifting machine decompression lifting loop, including fuel tank, hydraulic pump, check valve, pilot operated compound relief valve and system pressure table, described hydraulic pump input is connected with fuel tank, described hydraulic pump outfan is connected with major loop by check valve, decompression branch road and pressure regulation branch road it is provided with at described one-way valved outlet, it is provided with pilot operated compound relief valve on described pressure regulation branch road, the overfall of described pilot operated compound relief valve is connected to fuel tank, and the remote control orifice of described pilot operated compound relief valve is connected with fuel tank by two-position two-way solenoid valve；It is provided with overflow air relief valve on described decompression branch road.This new structural design is reasonable so that lifting machine lifting loop has pressure regulation, off-load and decompression, will not damage overflow air relief valve, reduce maintenance cost, it is ensured that work safety and continuous production, improve work efficiency when loading excessive.
Description
Technical field
This utility model relates to a kind of hydraulic circuit, specifically a kind of lifting machine decompression lifting loop.
Background technology
In the lifting loop of lifting machine, generally require addition air relief valve to constitute decompression branch road, do not affect principal series
Lift-off pressures is regulated in the case of the operating pressure of system, due to the existing producer of cost reason many uses direct acting pressure valve,
And during actually used, when often load occurring more than direct acting pressure valve set pressure, in direct acting pressure valve
Spool move under the effect of B mouth pressure and by completely separated with B mouth for A mouth so that go out in direct acting pressure valve
The problem now closing pressure, the situation even causing direct acting pressure valve to damage, not only increase maintenance cost, also shadow
Ring work safety, reduce work efficiency.
Utility model content
The purpose of this utility model is to provide a kind of lifting machine decompression lifting loop, to solve above-mentioned background technology
The problem of middle proposition.
For achieving the above object, the following technical scheme of this utility model offer:
A kind of lifting machine decompression lifting loop, including fuel tank, hydraulic pump, check valve, pilot operated compound relief valve and be
System Pressure gauge, described hydraulic pump input is connected with fuel tank, and described hydraulic pump outfan is by check valve and leads back
Road is connected, and is provided with decompression branch road and pressure regulation branch road, described pressure regulation branch road is provided with at described one-way valved outlet
Pilot operated compound relief valve, the overfall of described pilot operated compound relief valve is connected to fuel tank, described pilot operated compound relief valve remote
Program control donsole is connected with fuel tank by two-position two-way solenoid valve；It is provided with overflow air relief valve on described decompression branch road,
The A mouth of described overflow air relief valve is connected with major loop, and the B mouth of described overflow air relief valve passes through two-position four-way electromagnetism
Valve is connected with hydraulic cylinder, and the T mouth of described overflow air relief valve is connected with fuel tank；It is provided with system on described major loop
Pressure gauge, the decompression branch road at described overflow air relief valve rear is provided with load pressure table.
As further program of the utility model: described two position two-way valve is normally open.
Compared with prior art, the beneficial effects of the utility model are: arrange pilot operated compound relief valve, are used for regulating
The pressure of primary heat transport system also measures display by system pressure table；Two-position two-way solenoid valve is set, when obtaining electric,
System is unloading condition, and during dead electricity, pilot operated compound relief valve normally works；Overflow air relief valve is set, is used for reducing pressure
The decompression of branch road, and, when the load pressure of B mouth is more than overflow air relief valve set pressure, overflow air relief valve
Spool move under the effect of B mouth pressure and B mouth connected with T mouth so that fluid flows back to fuel tank, reaches
Overflow effect, it is achieved that the self-protection function of overflow air relief valve, it is to avoid load excessive damage overflow air relief valve,
Reduce maintenance cost, it is ensured that work safety, improve work efficiency；The setting of two-position four-way solenoid valve, for liquid
The commutation of cylinder pressure；Load pressure table is for measuring the load pressure of overflow air relief valve B mouth.
In sum, this new structural design is reasonable so that lifting machine lifting loop has pressure regulation, off-load and subtracts
Pressure function, will not damage overflow air relief valve when loading excessive, reduce maintenance cost, it is ensured that work safety and production
Seriality, improves work efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation in lifting machine decompression lifting loop.
In figure: 1-fuel tank, 2-hydraulic pump, 3-check valve, 4-pilot operated compound relief valve, 5-two-position two-way solenoid valve,
6-system pressure table, 7-overflow air relief valve, 8-load pressure table, 9-two-position four-way solenoid valve, 10-hydraulic cylinder.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the technical scheme in this utility model embodiment
It is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model,
Rather than whole embodiments.Based on the embodiment in this utility model, those of ordinary skill in the art are not having
Make the every other embodiment obtained under creative work premise, broadly fall into the scope of this utility model protection.
Refer to Fig. 1, a kind of lifting machine decompression lifting loop, including fuel tank 1, hydraulic pump 2, check valve 3,
Pilot operated compound relief valve 4 and system pressure table 6, described hydraulic pump 2 input is connected with fuel tank 1, described hydraulic pressure
Pump 2 outfan is connected with major loop by check valve 3, described check valve 3 exit be provided with reduce pressure branch road and
Pressure regulation branch road, described pressure regulation branch road is provided with pilot operated compound relief valve 4, the overflow of described pilot operated compound relief valve 4
Mouth is connected to fuel tank 1, and the remote control orifice of described pilot operated compound relief valve 4 is by two-position two-way solenoid valve 5 and oil
Case 1 is connected；Overflow air relief valve 7, the A mouth of described overflow air relief valve 7 and master it is provided with on described decompression branch road
Loop is connected, and the B mouth of described overflow air relief valve 7 is connected with hydraulic cylinder 10 by two-position four-way solenoid valve 9,
The T mouth of described overflow air relief valve 7 is connected with fuel tank 1；System pressure table 6, institute it is provided with on described major loop
State and be provided with load pressure table 8 on the decompression branch road at overflow air relief valve 7 rear.
Operation principle of the present utility model is: arrange pilot operated compound relief valve 4, for regulating the pressure of primary heat transport system
Power also measures display by system pressure table 6；Arranging two-position two-way solenoid valve 5, when obtaining electric, system is off-load
State, during dead electricity, pilot operated compound relief valve 4 normally works；Overflow air relief valve 7 is set, for reducing pressure branch road
Decompression, and, when the load pressure of B mouth is more than overflow air relief valve 7 set pressure, overflow air relief valve 7
Spool move under the effect of B mouth pressure and B mouth connected with T mouth so that fluid flows back to fuel tank, reaches
Overflow effect, it is achieved that the self-protection function of overflow air relief valve, it is to avoid load excessive damage overflow air relief valve 7,
Reduce maintenance cost, it is ensured that work safety, improve work efficiency；The setting of two-position four-way solenoid valve 9, is used for
The commutation of hydraulic cylinder 10；Load pressure table 8 is for measuring the load pressure of overflow air relief valve 7B mouth.
Claims (2)
1. a lifting machine decompression lifting loop, including fuel tank, hydraulic pump, check valve, pilot operated compound relief valve and system pressure
Power table, it is characterised in that described hydraulic pump input is connected with fuel tank, described hydraulic pump outfan is by check valve and leads back
Road is connected, and is provided with decompression branch road and pressure regulation branch road at described one-way valved outlet, described pressure regulation branch road is provided with pilot-operated type and overflows
Stream valve, the overfall of described pilot operated compound relief valve is connected to fuel tank, and the remote control orifice of described pilot operated compound relief valve passes through two
Two-way electromagnetic valve is connected with fuel tank；Overflow air relief valve, the A mouth of described overflow air relief valve and master it is provided with on described decompression branch road
Loop is connected, and the B mouth of described overflow air relief valve is connected with hydraulic cylinder by two-position four-way solenoid valve, described overflow air relief valve
T mouth is connected with fuel tank；It is provided with system pressure table on described major loop, the decompression branch road at described overflow air relief valve rear sets
It is equipped with load pressure table.
Lifting machine the most according to claim 1 decompression lifting loop, it is characterised in that described two position two-way valve is normal
Open state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620396992.9U CN205744644U (en) | 2016-05-04 | 2016-05-04 | Lifting machine decompression lifting loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620396992.9U CN205744644U (en) | 2016-05-04 | 2016-05-04 | Lifting machine decompression lifting loop |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205744644U true CN205744644U (en) | 2016-11-30 |
Family
ID=57372188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620396992.9U Expired - Fee Related CN205744644U (en) | 2016-05-04 | 2016-05-04 | Lifting machine decompression lifting loop |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205744644U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972664A (en) * | 2022-12-19 | 2023-04-18 | 山东泰丰智能控制股份有限公司 | Angle modulation device control system |
-
2016
- 2016-05-04 CN CN201620396992.9U patent/CN205744644U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115972664A (en) * | 2022-12-19 | 2023-04-18 | 山东泰丰智能控制股份有限公司 | Angle modulation device control system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170823 Address after: 221000 No. 3, Lo Shan Road, Xuzhou economic and Technological Development Zone, Jiangsu Patentee after: Xuzhou mantty Electronics Co. Ltd. Address before: 221000 Xuzhou economic and Technological Development Zone, Xuzhou, green window Commercial Plaza (I) block office building A, B and commercial building, unit 825, No. three Patentee before: Xuzhou Zhi Ou mechanical and Electrical Equipment Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161130 Termination date: 20170504 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |