CN201636134U - Safety balance valve bank - Google Patents
Safety balance valve bank Download PDFInfo
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- CN201636134U CN201636134U CN2010201421927U CN201020142192U CN201636134U CN 201636134 U CN201636134 U CN 201636134U CN 2010201421927 U CN2010201421927 U CN 2010201421927U CN 201020142192 U CN201020142192 U CN 201020142192U CN 201636134 U CN201636134 U CN 201636134U
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- valves
- oil
- valve
- equilibrium
- oil cylinder
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Abstract
The utility model relates to a safety balance valve bank for a hydraulic heightening system of a coal mining machine, belonging to an important component of the hydraulic heightening system of the coal mining machine. The safety balance valve bank is provided with a valve block, balance valves, one-way valves and overflowing valves, wherein the valve block is provided with two balance valves, two balance valves and two overflowing valves; oil inlets of the two balance valves are connected into the system; oil outlets of the two balance valves are respectively connected with a rod cavity and a rodless cavity of an oil cylinder; the oil inlets of the two one-way valves and the two overflowing valves are respectively connected on oil passages where the oil outlets of the two balance valves and the oil cylinder are connected; the oil outlets of the two overflowing valves and the two one-way valves are gathered together and are connected back to an oil tank by the oil passages. In the safety balance valve bank, the set pressure of the overflowing valves is higher than the overflowing pressure of the balance valves; the overflowing valves are used for secondary protection of pressure impact; and the one-way valves are used for supplying oil of the oil cylinder. The safety balance valve bank solves the problems that in the prior art, the damage of the balance valves is frequent, the system impact has larger damage on the sealing of the oil cylinder, and the service life of the oil cylinder is reduced, and the like.
Description
Technical field
The utility model relates to a kind of stable equilibrium valve group that is used for coal winning machine hydraulic pressure height-adjusting system, belongs to the important component part of coal winning machine hydraulic pressure height-adjusting system; Simultaneously, in the hydraulic system of other equal similar operating mode, also can be used widely.
Background technique
Coal winning machine is the nucleus equipment of fully mechanized mining face, and coal winning machine hydraulic pressure height-adjusting system is the indispensable part of coal winning machine.It can realize the lifting of coal machine rocking arm, makes cylinder reach suitable position and then the position that keeps rocking arm and cylinder, guarantees that the height of mining on request carries out.The equilibrium valve group belongs to the easily damaged parts of coal winning machine hydraulic pressure height-adjusting system, because in the process of coal winning machine coal cutting, cylinder can be impacted, and this impact passes to rocking arm by cylinder and passes to oil cylinder by rocking arm, passes to stable equilibrium valve group by oil cylinder.In the using process of reality, often occur producing fault because of the inefficacy of equilibrium valve.This just requires stable equilibrium valve group when the excellent pressure maintaining function is arranged, also wanting can be in that surpass can drain charge when setting dwell pressure and impact, guaranteeing that pipeline and other element are not hit and damage, and can make the pressure in oil cylinder two chambeies reach balance rapidly in the time of off-load.
At present, the assembly of forming by two equilibrium valves and valve piece that the equilibrium valve group that coal winning machine is commonly used is commonly used, this equilibrium valve group can satisfy the requirement that pressurize, high pressure unloading and additional oil cylinder fluid reach oil cylinder two cavity pressure balances in theory.But in actual use, because system is frequently impacted, high pressure unloading also frequently takes place, when particularly being subjected to huge impact in system, equilibrium valve pressure can raise suddenly, and the equilibrium valve overflow needs the regular hour to respond, and the spool to equilibrium valve will produce erratic impact like this, and these impacts reduce the working life of equilibrium valve.
In addition, impacted and after making the equilibrium valve overflow,, will cause a chamber of oil cylinder to produce negative pressure, must replenish fluid immediately and make oil cylinder two cavity pressures reach balance because cylinder rod chamber is different with the rodless cavity area at oil cylinder.Though equilibrium valve itself has the passage of repairing from system, the oil of mending comes from the system, and the fluid of suction must pass through filter, cooler, valve piece, valve etc., has just strengthened the time of repairing response.Like this, cylinder seal there is very big infringement, reduces the life-span of cylinder seal.
The model utility content
The purpose of this utility model is to provide a kind of stable equilibrium valve group that is used for coal winning machine hydraulic pressure height-adjusting system, mainly solves equilibrium valve of the prior art and damages frequently, and system shock is big to the cylinder seal infringement, the problems such as life-span of reduction cylinder seal.It can prolong equilibrium valve working life, prolong cylinder seal working life, improves the reliability of coal-mining machine hydraulic system.
The technical solution of the utility model is:
A kind of stable equilibrium valve group, this stable equilibrium valve group is provided with valve piece, equilibrium valve, one-way valve and relief valve, two equilibrium valves, two one-way valves and two relief valves are installed on the valve piece, the filler opening connecting system of two equilibrium valves, the oil outlet of two equilibrium valves connects the rod chamber and the rodless cavity of oil cylinder respectively, the filler opening of two one-way valves and two relief valves is connected on respectively on the oil duct that two equilibrium valves export with oil cylinder is connected, the oil outlet of two relief valves and two one-way valves pools together, and takes back fuel tank by oil duct.
Described stable equilibrium valve group, during the normal oil inlet and oil return of two equilibrium valves, an equilibrium valve control of turning hydraulic fluid port is received the filler opening of another equilibrium valve respectively.
Described stable equilibrium valve group, the valve piece is provided with five hydraulic fluid ports, and wherein two hydraulic fluid ports link to each other with rodless cavity with the rod chamber of oil cylinder respectively, two hydraulic fluid port difference connecting systems, another one hydraulic fluid port connected tank.
Described stable equilibrium valve group, two hydraulic fluid ports of connecting system are respectively the filler opening of two equilibrium valves, and two hydraulic fluid ports that connect the rod chamber of oil cylinder and rodless cavity are respectively the oil outlet of two equilibrium valves.
The beneficial effects of the utility model are:
1. the utility model stable equilibrium valve group has shortened equilibrium valve and has been stressed time of overflow response when impacting, and prolongs the working life of equilibrium valve, has reduced because of the fault of equilibrium valve because of the hydraulic pressure height-adjusting system that is subjected to frequent impacting with high pressure damage and causes.
2. the utility model stable equilibrium valve group can make and impact that the pressure in oil cylinder two chambeies reaches pressure balance rapidly after the off-load, has avoided oil cylinder untimely because of repairing, and a chamber produces negative pressure and causes cylinder seal to damage, and then has prolonged the working life of adjust high cylinder.
3. the setting pressure of the utility model relief valve is higher than the oil pressure relief of equilibrium valve; after equilibrium valve is under pressure and impacts; when pressure is higher than the oil pressure relief that equilibrium valve sets and when being lower than the pressure that relief valve sets; fluid is by the equilibrium valve overflow; fluid is by equilibrium valve and relief valve overflow simultaneously when pressure is higher than the pressure of relief valve setting; so just shunted the flow of equilibrium valve overflow; shortened the equilibrium valve overflow response time; reduced the impact of equilibrium valve, relief valve has played the second class protection of compression shock.The hydraulic oil that relief valve overflows can be directly replenishes to another chamber of oil cylinder by one-way valve, when the oil cylinder rodless cavity overflow, replenished cylinder rod chamber after, the then direct oil sump tank of redundance; When the cylinder rod chamber overflow, replenished oil cylinder rodless cavity after, insufficient section hydraulic oil can be immediately be inhaled into oil cylinder from fuel tank through one-way valve.
Description of drawings
Fig. 1 is the schematic diagram (dot and dash line wire frame part) of the utility model stable equilibrium valve group.
Fig. 2 is the outline drawing of the utility model stable equilibrium valve group.
Among the figure, 1 valve piece; 2 equilibrium valves; 3 one-way valves; 4 relief valves; 2.1 equilibrium valve I; 2.2 equilibrium valve II; 3.1 one-way valve I; 3.2 one-way valve II; 4.1 relief valve I; 4.2 relief valve II.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified.
Shown in Fig. 1-2, the utility model stable equilibrium valve group, mainly comprise: valve piece 1, equilibrium valve 2, one-way valve 3, relief valve 4 etc., two equilibrium valves 2 are installed on the valve piece 1, two one-way valves 3 and two relief valves 4, the filler opening connecting system of two equilibrium valves 2 (coal winning machine hydraulic pressure height-adjusting system) oil inlet and oil return, the oil outlet of two equilibrium valves 2 connects the rod chamber and the rodless cavity of oil cylinder respectively, the filler opening of two one-way valves 3 and two relief valves 4 is connected on respectively on the oil duct that two equilibrium valves export with oil cylinder is connected, the oil outlet of two relief valves and two one-way valves pools together, and takes back fuel tank by oil duct.
In the utility model, during the normal oil inlet and oil return of two equilibrium valves 2, an equilibrium valve control of turning hydraulic fluid port is received the filler opening of another equilibrium valve respectively.
As shown in Figure 2, in the utility model, valve piece 1 is provided with five hydraulic fluid ports (A1, B1, A2, B2 and Dr), and wherein two hydraulic fluid port A2, B2 link to each other with rodless cavity with the rod chamber of oil cylinder respectively, two hydraulic fluid port A1, B1 difference connecting system oil inlet and oil returns, another one hydraulic fluid port Dr connected tank.Two hydraulic fluid port A1, B1 of connecting system are respectively the filler opening of two equilibrium valves (equilibrium valve I 2.1 and equilibrium valve II2.2), two hydraulic fluid port A2, B2 connecing the rod chamber of oil cylinder and rodless cavity are respectively the oil outlet of two equilibrium valves (equilibrium valve I 2.1 and equilibrium valve II2.2), and the filler opening of two relief valves (relief valve I 4.1 and relief valve II 4.2) and two one-way valves (one-way valve I3.1 and one-way valve II3.2) is connected on respectively on two equilibrium valves outlets and the oil duct that oil cylinder is connected.Then, the oil outlet of two relief valves and two one-way valves is pooled together, take back fuel tank.
In the utility model, the setting pressure of relief valve is higher than the oil pressure relief of equilibrium valve, and relief valve is used for the second class protection of compression shock, and one-way valve is used for replenishing oil cylinder fluid.
Working procedure of the present utility model is as follows:
Shown in Fig. 1-2, A1 mouth, B1 mouth connecting system, A2 mouth, B2 mouth connect oil cylinder, Dr mouth connected tank.The setting pressure of equilibrium valve 2 overflows is lower than the setting pressure of relief valve 4.During the normal coal cutting of coal winning machine,
Impact setting pressure less than equilibrium valve 2 overflows when oil cylinder is stressed, stable equilibrium valve group is in packing state;
When oil cylinder rodless cavity is hit pressure for greater than the setting pressure of equilibrium valve 2 overflows, less than relief valve 4 setting pressures the time, rodless cavity hydraulic oil is through equilibrium valve II2.2 overflow; Simultaneously, rod chamber sucks the fuel tank inner fluid through one-way valve I 3.1, reaches oil cylinder two cavity pressure balances immediately; When cylinder rod chamber is hit pressure for greater than the setting pressure of equilibrium valve 2 overflows, less than the setting pressure of relief valve 4 time, rod chamber hydraulic oil is through equilibrium valve I 2.1 overflows; Simultaneously, rodless cavity sucks the fuel tank inner fluid through one-way valve II 3.2, reaches oil cylinder two cavity pressure balances immediately.
When being stressed, oil cylinder rodless cavity impacts the setting pressure that surpasses relief valve 4, equilibrium valve II2.2 and relief valve II4.2 overflow simultaneously, the hydraulic oil that relief valve II4.2 overflows replenishes to the oil cylinder rod chamber by one-way valve I 3.1, redundance reaches oil cylinder two cavity pressure balances immediately then through the direct oil sump tank of Dr mouth.When cylinder rod chamber is stressed when impact surpassing relief valve 4 setting pressures, equilibrium valve I 2.1 and relief valve I 4.1 overflows simultaneously, the hydraulic oil that relief valve I 4.1 overflows replenishes to the oil cylinder rodless cavity by one-way valve II 3.2, insufficient section hydraulic oil can be immediately from fuel tank process Dr mouth, be inhaled into oil cylinder rodless cavity through one-way valve II 3.2, reach oil cylinder two cavity pressure balances immediately.
Claims (4)
1. stable equilibrium valve group, it is characterized in that: this stable equilibrium valve group is provided with valve piece, equilibrium valve, one-way valve and relief valve, two equilibrium valves, two one-way valves and two relief valves are installed on the valve piece, the filler opening connecting system of two equilibrium valves, the oil outlet of two equilibrium valves connects the rod chamber and the rodless cavity of oil cylinder respectively, the filler opening of two one-way valves and two relief valves is connected on respectively on the oil duct that two equilibrium valves export with oil cylinder is connected, the oil outlet of two relief valves and two one-way valves pools together, and takes back fuel tank by oil duct.
2. according to the described stable equilibrium valve of claim 1 group, it is characterized in that: during the normal oil inlet and oil return of two equilibrium valves, an equilibrium valve control of turning hydraulic fluid port is received the filler opening of another equilibrium valve respectively.
3. according to the described stable equilibrium valve of claim 1 group, it is characterized in that: the valve piece is provided with five hydraulic fluid ports, and wherein two hydraulic fluid ports link to each other with rodless cavity with the rod chamber of oil cylinder respectively, two hydraulic fluid port difference connecting systems, another one hydraulic fluid port connected tank.
4. according to the described stable equilibrium valve of claim 1 group, it is characterized in that: two hydraulic fluid ports of connecting system are respectively the filler opening of two equilibrium valves, and two hydraulic fluid ports that connect the rod chamber of oil cylinder and rodless cavity are respectively the oil outlet of two equilibrium valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201421927U CN201636134U (en) | 2010-03-26 | 2010-03-26 | Safety balance valve bank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201421927U CN201636134U (en) | 2010-03-26 | 2010-03-26 | Safety balance valve bank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201636134U true CN201636134U (en) | 2010-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201421927U Expired - Fee Related CN201636134U (en) | 2010-03-26 | 2010-03-26 | Safety balance valve bank |
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| Country | Link |
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| CN (1) | CN201636134U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536963A (en) * | 2011-12-31 | 2012-07-04 | 长沙中联消防机械有限公司 | Engineering machinery as well as protection method and protection method of landing leg horizontal oil cylinder thereof |
| CN102979767A (en) * | 2012-11-07 | 2013-03-20 | 中国航空工业集团公司沈阳发动机设计研究所 | Limiting method for synchronous limit of actuating cylinders |
| CN103758805A (en) * | 2013-12-27 | 2014-04-30 | 北京市三一重机有限公司 | Main pushing hydraulic system and tube push bench |
| CN105134685A (en) * | 2015-09-16 | 2015-12-09 | 凯盛重工有限公司 | Hydraulic circuit system for protecting oil cylinders |
| CN108730255A (en) * | 2018-07-31 | 2018-11-02 | 上海立新液压有限公司 | A kind of luffing balanced valve |
-
2010
- 2010-03-26 CN CN2010201421927U patent/CN201636134U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102536963A (en) * | 2011-12-31 | 2012-07-04 | 长沙中联消防机械有限公司 | Engineering machinery as well as protection method and protection method of landing leg horizontal oil cylinder thereof |
| CN102979767A (en) * | 2012-11-07 | 2013-03-20 | 中国航空工业集团公司沈阳发动机设计研究所 | Limiting method for synchronous limit of actuating cylinders |
| CN102979767B (en) * | 2012-11-07 | 2016-01-20 | 中国航空工业集团公司沈阳发动机设计研究所 | The synchronous limit limit method of a kind of pressurized strut |
| CN103758805A (en) * | 2013-12-27 | 2014-04-30 | 北京市三一重机有限公司 | Main pushing hydraulic system and tube push bench |
| CN103758805B (en) * | 2013-12-27 | 2016-03-23 | 北京市三一重机有限公司 | Main propulsion hydraulic system and push-bench |
| CN105134685A (en) * | 2015-09-16 | 2015-12-09 | 凯盛重工有限公司 | Hydraulic circuit system for protecting oil cylinders |
| CN108730255A (en) * | 2018-07-31 | 2018-11-02 | 上海立新液压有限公司 | A kind of luffing balanced valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20160326 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |