CN202251166U - Pilot oil control loop - Google Patents
Pilot oil control loop Download PDFInfo
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- CN202251166U CN202251166U CN2011202684549U CN201120268454U CN202251166U CN 202251166 U CN202251166 U CN 202251166U CN 2011202684549 U CN2011202684549 U CN 2011202684549U CN 201120268454 U CN201120268454 U CN 201120268454U CN 202251166 U CN202251166 U CN 202251166U
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Abstract
The utility model discloses a pilot oil control loop. The pilot oil control loop comprises main valves (100), and pilot valves (11) which are connected with control ports of the main valves (100); the pilot oil control loop also comprises reversing devices; the pilot valves (11) are connected with the control ports of the main valves (100) through the reversing devices; and the ratio of the number N of the main valves (11) to the number M of the pilot valves (M) is greater than 1/2, wherein N and M are both positive integers. In the pilot oil control loop, the reversing devices are arranged between the pilot valves and the main valves, so the pilot valve is not needed to be arranged for each control port of the main valve; and therefore, the aim of reducing the using number of the pilot valves is fulfilled, and total cost is reduced.
Description
Technical field
The utility model relates to the hydraulic control field, particularly, relates to a kind of guide oil control loop.
Background technique
At present, in the hydraulic control field, the mode that extensively adopts the guide to control is come the main valve of controlled hydraulic system, to be adapted to the application of hydraulic system in heavily loaded occasion.
Shown in Figure 1 is a kind of schematic representation of traditional guide oil control loop.As shown in Figure 1, traditional guide oil control loop comprises main valve 100 and is installed in two guide's electromagnetic proportional valves 201 and 202 at main valve 100 two ends respectively.When the valve rod that needs main valve 100 101 moves in orientation shown in Figure 1 from left to right; Guide's electromagnetic proportional valve 201 is connected; To allow guide oil to get into valve rod 101 left sides of main valve 100; Thereby actuate valve stem 101 moves from left to right, and the guide oil on valve rod 101 right sides then flows back to fuel tank through guide's electromagnetic proportional valve 202.
The defective of this traditional guide oil control loop is: to a main valve, two guide's electromagnetic proportional valves must be set, therefore the demand so that the valve rod that satisfies this main valve moves at both direction needs to use more guide's electromagnetic proportional valve.Because the price of guide's electromagnetic proportional valve is higher relatively, thereby causes the whole cost of guide oil control loop higher.
Example among Fig. 1 belongs to comparatively simple example, and in practical project machinery, because hydraulic system is comparatively complicated, so the guide oil control loop can use a lot of guide's electromagnetic proportional valves, causes cost sharply to rise.
Therefore, the cost that how to reduce the guide oil control loop effectively becomes related domain technical issues that need to address.
The model utility content
The purpose of the utility model provides the relatively low guide oil control loop of a kind of cost.
To achieve these goals; The utility model provides a kind of guide oil control loop, and this guide oil control loop comprises main valve and the pilot valve that is connected with the control mouth of this main valve, wherein; Said guide oil control loop also comprises reversing arrangement; Said pilot valve is connected with the control mouth of said main valve through this reversing arrangement, and the ratio of the number N of said main valve and the number M of said pilot valve is greater than 1/2, and N and M are positive integer.
Preferably, said reversing arrangement has M guide oil inlet and 2N guide oil outlet, and this M guide oil inlet is connected with the outlet of each said pilot valve respectively, and said 2N guide oil outlet is connected with the control mouth of each said main valve respectively.
Preferably; The number N of said main valve is 1; The number M of said pilot valve is 1; Said reversing arrangement comprises one first selector valve, outlet of first guide oil and the outlet of second guide oil that this first selector valve has the guide oil inlet that is connected with the outlet of said pilot valve, the return opening that is connected with fuel tank and is connected with the control mouth of said main valve respectively.
Preferably, said first selector valve is a two-position four-way valve, and when the spool of this two-position four-way valve was positioned at primary importance, said guide oil inlet was connected with said first guide oil outlet, and said return opening is connected with said second guide oil outlet; When the spool of said two-position four-way valve was positioned at the second place, said guide oil inlet was connected with said second guide oil outlet, and said return opening is connected with said first guide oil outlet.
Preferably; The number N of said main valve is not less than 2; The number M of said pilot valve is not less than 1; Said reversing arrangement selectively is separately connected to the control mouth of each said main valve respectively the outlet of corresponding pilot valve, perhaps selectively simultaneously the control mouth of any two main valves is connected to the outlet of corresponding pilot valve at least.
Preferably; The number N of said main valve is 2; The number M of said pilot valve is 2, and said reversing arrangement is connected to the outlet of corresponding pilot valve respectively independently with the control mouth of each said main valve, perhaps simultaneously the control mouth of each said main valve is connected to the outlet of corresponding pilot valve.
Preferably; Said reversing arrangement comprises one second selector valve and two the 3rd selector valves; This second selector valve has two guide oil inlets and two outlets; The return opening that each said the 3rd selector valve (14) has filler opening, connect with fuel tank and the outlet of first guide oil and second guide oil that are connected with the control mouth of corresponding main valve respectively export; Two guide oil inlets of said second selector valve are connected with the outlet of said two pilot valves respectively, and two outlets of said second selector valve are connected with the filler opening of said two the 3rd selector valves respectively.
Preferably, said second selector valve is two-position four-way valve or three-position four-way valve, and said the 3rd selector valve is a two-position four-way valve.
Preferably; The number N of said main valve is 4; The number M of said pilot valve is 2, and said reversing arrangement is connected to the outlet of corresponding pilot valve respectively independently with the control mouth of each said main valve, and control mouth that perhaps simultaneously will any two main valves is connected to the outlet of the pilot valve of correspondence.
Preferably; Said reversing arrangement comprises two the 4th selector valves and four the 5th selector valves; Each the 4th selector valve has a guide oil inlet and three outlets; The return opening that each the 5th selector valve has filler opening, connect with fuel tank and the outlet of first guide oil and second guide oil that are connected with the control mouth of corresponding main valve respectively export; The guide oil inlet of said two the 4th selector valves is connected with the outlet of two pilot valves respectively; Three outlets of one the 4th selector valve are connected to first three filler openings to the 3rd the 5th selector valve, and three outlets of another the 4th selector valve are connected to second three filler opening to the 4th the 5th selector valve.
Preferably, said the 4th selector valve is a three-position four-way valve, and said the 5th selector valve is a two-position four-way valve.
Preferably, when at the same time the control mouth of any two main valves being connected to the outlet of corresponding pilot valve, the outlet connection of the control mouth of different main valves and different pilot valves.
Preferably; The number M of the number N of said main valve and said pilot valve is 5; Said reversing arrangement comprises 5 the 6th selector valves, and each the 6th selector valve has the guide oil inlet that connects with the outlet of a corresponding pilot valve, the return opening that is connected with fuel tank and first guide oil that is connected with the control mouth of a corresponding main valve respectively exports and second guide oil exports.
Preferably, said pilot valve is an electromagnetic proportional valve.
Pass through technique scheme; Because in the guide oil control loop, through between pilot valve and main valve, being provided with reversing arrangement, thereby need not pilot valve all to be set to each control mouth of main valve; And then realize reducing the purpose that pilot valve uses number, reduce whole cost.
Other feature and advantage of the utility model will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is the further understanding that is used to provide the utility model, and constitutes the part of specification, is used to explain the utility model with following embodiment, but does not constitute the restriction to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation of traditional guide oil control loop;
Fig. 2 is the principle sketch according to the guide oil control loop of the utility model;
Fig. 3 is the schematic representation according to the guide oil control loop of a kind of mode of execution of the utility model;
Fig. 4 is the schematic representation according to the guide oil control loop of the another kind of mode of execution of the utility model;
Fig. 5 is the schematic representation according to the guide oil control loop of another mode of execution of the utility model;
Fig. 6 is the schematic representation according to the guide oil control loop of another mode of execution of the utility model.
Description of reference numerals
First selector valve 12
The guide oil inlet 121 of first selector valve
The return opening 122 of first selector valve
First guide oil outlet 123 of first selector valve
Second guide oil outlet 124 of first selector valve
The guide oil inlet 131,132 of second selector valve
The outlet 133,134 of second selector valve
The 3rd selector valve 14
The filler opening 141 of the 3rd selector valve
The return opening 142 of the 3rd selector valve
First guide oil outlet 143 of the 3rd selector valve
Second guide oil outlet 144 of the 3rd selector valve
The 4th selector valve 15
The guide oil inlet 151 of the 4th selector valve
The outlet 152,153,154 of the 4th selector valve
The 5th selector valve 16
The filler opening 161 of the 5th selector valve
The return opening 162 of the 5th selector valve
First guide oil outlet 163 of the 5th selector valve
Second guide oil outlet 164 of the 5th selector valve
The 6th selector valve 17
Embodiment
Be elaborated below in conjunction with the embodiment of accompanying drawing to the utility model.Should be understood that embodiment described herein only is used for explanation and explains the utility model, is not limited to the utility model.
As shown in Figure 2; The guide oil control loop that the utility model provided comprises main valve 100 and the pilot valve 11 that is connected with the control mouth of this main valve 100; Wherein, said guide oil control loop also comprises reversing arrangement, and said pilot valve 11 is connected with the control mouth of said main valve 100 through this reversing arrangement; And the ratio of the number N of said main valve 100 and the number M of said pilot valve 11 is greater than 1/2, and N and M are positive integer.
Different with traditional guide oil control loop, in the technological scheme of the utility model, the control mouth of main valve 100 is not directly to be connected with pilot valve 11; But realize and being connected of pilot valve 11 through reversing arrangement; Therefore do not need to utilize reversing arrangement can realize the flow direction of guide oil, thereby reduce dependence largely to pilot valve 11 with the pilot valve that independent setting is provided to each control mouth of main valve 100; Reduce whole cost, to realize the purpose of the utility model.
And because the control mouth of each main valve 100 does not need the pilot valve that is provided with separately, so the ratio of the number N of main valve 100 (then the number of the control mouth of main valve 100 is 2N) and the number M of pilot valve 11 is greater than 1/2; Wherein, N and M are positive natural number (1,2,3 ...).Can also see in the mode of execution below that the number N of main valve 100 equals the situation of the number M of pilot valve 11, and the number N of main valve 100 is 2 times the situation of the number M of pilot valve 11.This can both explain that the technological scheme of the utility model can reduce cost at the quantitative good effect of dependence that reduces pilot valve 11 largely.
Because reversing arrangement is connected between the control mouth of outlet and main valve 100 of pilot valve 11; Therefore; Said reversing arrangement has M guide oil inlet and 2N guide oil outlet; This M guide oil inlet is connected with the outlet of each said pilot valve 11 respectively, and said 2N guide oil outlet is connected with the control mouth of each said main valve 100 respectively.
Reversing arrangement can adopt the reversing arrangements of various differences controls that can the guide oil of pilot valve 11 selectively be transported to main valve 100 mouthful, can adopt the combination (for example switch etc.) of various valves and other hydraulic element.To combine accompanying drawing below, the various combination mode of main valve 100 and pilot valve 11 and the various combination mode of reversing arrangement will be described in detail.
As shown in Figure 3; The number N of said main valve 100 can be 1; The number M of said pilot valve 11 can be 1; Said reversing arrangement comprises one first selector valve 12, first guide oil outlet, 123 and second guide oil outlet 124 that this first selector valve 12 has the guide oil inlet 121 that is connected with the outlet of said pilot valve 11, the return opening 122 that is connected with fuel tank and is connected with the control mouth of said main valve 100 respectively.
The control that mode of execution shown in Fig. 3 is realized the guide oil that comes from a pilot valve 11 through one first selector valve 12; Thereby make guide oil both can flow to the control mouth in main valve 100 left sides; Also can flow to the control mouth on main valve 100 right sides, to realize control to the spool of main valve 100.Compare with the traditional guide oil control loop shown in Fig. 1, the mode of execution shown in Fig. 3 only needs a pilot valve 11 to get final product, and therefore realizes the purpose that reduces cost.
Specifically, pilot valve 11 is controlled the guide oil the inlet 121 whether guide oil that comes from oil sources P feeds first selector valve 12.When the spool of pilot valve 11 was in position, a left side in Fig. 3, guide oil flow to the guide oil inlet 121 of first selector valve 12 via pilot valve 11.
In this case; If want the spool of main valve 100 in the orientation of Fig. 3, to move from left to right, then make the spool of first selector valve 12 be in right position, guide oil flows into first selector valve 12 from guide oil inlet 121; And from first guide oil outlet, 123 outflows, first selector valve 12; Get into the control mouth in main valve 100 left sides, thereby the spool that drives main valve 100 moves from left to right, the hydraulic oil on the spool right side of main valve 100 can export 124 oil returns to fuel tank through second guide oil at this moment; If want the spool of main valve 100 in the orientation of Fig. 3, to move from right to left; Then make the spool of first selector valve 12 be in position, a left side,, guide oil flows into first selector valve 12 from guide oil inlet 121; And from second guide oil outlet, 124 outflows, first selector valve 12; Get into the control mouth on main valve 100 right sides, thereby the spool that drives main valve 100 moves from right to left, the hydraulic oil in the spool of main valve 100 left side exports 123 oil returns to fuel tank through first guide oil at this moment.
First selector valve 12 can be various suitable selector valves, and for example two-position four-way valve or three-position four-way valve etc. are as long as can realize the function of first selector valve 12.The control mode of first selector valve 12 also can be selected according to concrete working condition, and for example first selector valve 12 can be hand control valve or hydraulic control valve, but is preferably solenoid electric valve.
Under the preferable case; As shown in Figure 3; Said first selector valve 12 is a two-position four-way valve; When the spool of this two-position four-way valve was arranged in primary importance (being the right position of Fig. 3), said guide oil inlet 121 was connected with said first guide oil outlet 123, and said return opening 122 is connected with said second guide oil outlet 124; When the spool of said two-position four-way valve was arranged in the second place (being the position, a left side of Fig. 3), said guide oil inlet 121 was connected with said second guide oil outlet 124, and said return opening 122 is connected with said first guide oil outlet 123.
In the mode of execution shown in Figure 3, the number N of main valve 100 is 1, and the number M of pilot valve 11 is 1.But the utility model is not limited to this, and main valve 100 also has more compound mode with pilot valve 11.For example; The number N of said main valve 100 can be not less than 2 (being N >=2); The number M of said pilot valve 11 is not less than 1 (being M >=1); Said reversing arrangement selectively is separately connected to the control mouth of each said main valve 100 respectively the outlet of corresponding pilot valve 11, perhaps selectively simultaneously the control mouth of any two main valves 100 is connected to the outlet of corresponding pilot valve 11 at least.In this embodiment, can realize utilizing the action of the more main valve 100 of pilot valve 11 controls still less, for example can utilize the action of two main valves 100 of a pilot valve 11 controls.The control mouth of each main valve 100 can be separately connected to the outlet of corresponding pilot valve 11 respectively through reversing arrangement; Thereby can utilize pilot valve 11 and reversing arrangement to realize independent control, make separate and action uninterruptedly between each main valve 100 each main valve 100.In addition; Reversing arrangement can also be connected to the control mouth of any two main valves 100 outlet of corresponding pilot valve 11 simultaneously at least; Thereby can control the action of these main valves 100 simultaneously, this can satisfy the needs of the workplace that these main valves 100 are fitted to each other.For example, as required can be simultaneously any two, the control mouth of any three or whole main valve 100 be connected to the outlet of corresponding pilot valve 11.
For example; Preferably; As shown in Figure 4, the number N of said main valve 100 is 2, and the number M of said pilot valve 11 is 2; Said reversing arrangement is connected to the outlet of corresponding pilot valve 11 respectively independently with the control mouth of each said main valve 100, perhaps simultaneously the control mouth of each said main valve 100 is connected to the outlet of corresponding pilot valve 11.
In mode of execution shown in Figure 4, utilize reversing arrangement, can utilize the action of two main valves 100 of two pilot valve control.Specifically, reversing arrangement can be connected to the control mouth of each main valve 100 outlet of corresponding pilot valve 11 respectively independently, and selectively controls the Different control mouth that guide oil flows to different main valves 100; Perhaps simultaneously the control mouth of each main valve 100 is connected to the outlet of corresponding pilot valve 11, thereby can drives the action of main valve 100 simultaneously.
In order to realize this mode of execution, can adopt various suitable reversing arrangements, this reversing arrangement can comprise the combination of multiple selector valve, can also utilize simultaneously the on off operating mode of pilot valve 11 oneself.For example, reversing arrangement can be three six-way transfer valves, and these six valve ports are connected to the outlet of two pilot valves 11 and the control mouth of two main valves 100, in different positions, realize the on off operating mode between the different valve ports.
But preferably; In order to control guide oil more easily, as shown in Figure 4, said reversing arrangement comprises one second selector valve 13 and two the 3rd selector valves 14; This second selector valve 13 has two guide oil inlets 131; Return opening 142 that 132 and two outlets 133,134, each said the 3rd selector valve 14 have filler opening 141, connect with fuel tank and first guide oil that is connected with the control mouth of corresponding main valve 100 respectively export 143 and second guide oil and export 144; Two guide oil inlets 131 of said second selector valve 13; 132 are connected with the outlet of said two pilot valves 11 respectively, and two outlets 133,134 of said second selector valve 13 are connected with the filler opening 141 of said two the 3rd selector valves 14 respectively.
The effect of second selector valve 13 is that the guide oil that comes from two pilot valves 11 is distributed to two the 3rd selector valves 14, thereby is supplied to the control mouth of main valve 100 separately by 14 decisions of the 3rd selector valve again.
Specifically, when wanting any main valve 100 action, corresponding pilot valve 11 is connected, and another pilot valve 11 break off.For example, main valve 100 actions in left side in wanting Fig. 4, when the main valve 100 on right side was failure to actuate, the pilot valve 11 on the left of can making was connected, and the pilot valve 11 on right side breaks off, thereby only utilizes the pilot valve 11 in left side to supply guide oils to second selector valve 13.Under this state; Guide oil gets into second selector valve 13 through the pilot valve 11 in left side; And the guide oil inlet 131 and the outlet 133 that are in second selector valve 13 of left side position through spool flow to the filler opening 141 of the 3rd selector valve 14 in left side, and then the valve element position of the 3rd selector valve 14 in control left side decides the control mouth that guide oil is transferred to the correspondence of left side main valve 100.When only wanting to control right side main valve 100, the pilot valve 11 in left side is broken off, and only utilize the pilot valve 11 on right side to supply guide oils to second selector valve 13.This process and said process are similar, repeat no more here.And when wanting to control left side main valve 100 with right side main valve 100 simultaneously; Then two pilot valves 11 are all to second selector valve, 13 supply guide oils; Then the two-way guide oil can be supplied to left side the 3rd selector valve 14 and right side the 3rd selector valve 14 respectively simultaneously, and then utilizes the spool of these two the 3rd selector valves, 14 each self-corresponding main valves 100 of control.
Can know through foregoing description, utilize this mode of execution, can distinguish and control each main valve 100 individually, can also control two main valves 100 simultaneously, thereby be adapted to the requirement of different operating occasion.Here, pilot valve 11 self also plays the function of control guide oil flow direction.
In addition; In the mode of execution of Fig. 4, be designed with two pilot valves; Thereby when utilizing two pilot valves simultaneously guide oil to be fed to two 100 last times of different main valves respectively, owing to flow to the separate and mutual noninterference of the guide oil of control mouth of two main valves 100, can be according to two main valves, 100 different working conditions needs; Control the displacement amount of corresponding main valve 100 valve rods through the oil pressure size of controlling corresponding pilot valve 11, and then realize respectively main valve 100 being carried out proportional control.
But the utility model is not limited to this, on the basis of the mode of execution of Fig. 4, designs a pilot valve 11 and also is fine.Just, in the mode of execution of a pilot valve 11, the oil pressure of guide oil that is fed to the control mouth of two main valves 100 simultaneously equals the oil pressure of these pilot valve 11 output guide oils, and therefore the action of the spool of two main valves 100 is interactional.
The effect of second selector valve 13 is that the guide oil that comes from two pilot valves 11 is distributed to two the 3rd selector valves 14.This second selector valve 13 can adopt various suitable selector valve devices, for example three-position four-way valve, two-position four-way valve etc.The control mode of second selector valve 13 also can be manually operated valve, hydraulic control valve, but is preferably solenoid electric valve.As shown in Figure 4, when the spool of second selector valve 13 during in right position, this second selector valve 13 cuts out, thereby plays the effect of similar main switch, so that carry out operation such as system maintenance.
The effect of the 3rd selector valve 14 is to control which control mouth that the guide oil that comes from second selector valve 13 flows to corresponding main valve 100, and the 3rd selector valve 14 can be for two-position four-way valve or three-position four-way valve etc., as long as can realize the function of the 3rd selector valve 14.The control mode of the 3rd selector valve 14 also can be selected according to concrete working condition, for example can be hand control valve or hydraulic control valve, but be preferably solenoid electric valve.
For another example; As shown in Figure 5; Preferably, the number N of said main valve 100 is 4, and the number M of said pilot valve 11 is 2; Said reversing arrangement is connected to the outlet of corresponding pilot valve 11 respectively independently with the control mouth of each said main valve 100, and control mouth that perhaps simultaneously will any two main valves 100 is connected to the outlet of the pilot valve 11 of correspondence.
In mode of execution shown in Figure 5, utilize reversing arrangement, can utilize the action of four main valves 100 of two pilot valve control.Specifically, reversing arrangement can be connected to the control mouth of each main valve 100 outlet of corresponding pilot valve 11 respectively independently, and selectively controls the Different control mouth that guide oil flows to different main valves 100; Perhaps simultaneously the control mouth of any two main valves 100 is connected to the outlet of corresponding pilot valve 11, thereby can drives the action of these two main valves 100 simultaneously.
Reversing arrangement can adopt various suitable types, and this reversing arrangement can comprise the combination of multiple selector valve, can also utilize simultaneously the on off operating mode of pilot valve 11 oneself.
For example; Preferably; As shown in Figure 5, said reversing arrangement comprises two the 4th selector valves 15 and four the 5th selector valves 16, and each the 4th selector valve 15 has 151 and three outlets 152 of a guide oil inlet; 153; 154, return opening 162 that each the 5th selector valve 16 has filler opening 161, connect with fuel tank and first guide oil outlet, 163 and second guide oil outlet 164 that is connected with the control mouth of corresponding main valve 100 respectively, the guide oil of said two the 4th selector valves 15 enters the mouth and 151 is connected with the outlet of two pilot valves 11 respectively; Three outlets 152 of one the 4th selector valve 15 are connected to first three filler openings 161 to the 3rd the 5th selector valve 16, and three outlets 152 of another the 4th selector valve 15 are connected to second three filler opening 161 to the 4th the 5th selector valve 16.
Two the 4th selector valves 15 are connected with separately pilot valve 11 respectively, and the guide oil that will come from each pilot valve 11 according to the different working occasion is assigned to the 5th different selector valves 16.The 5th selector valve 16 has corresponding relation with main valve 100, and each the 5th selector valve 16 is used to control the control mouth of guide oil being supplied with corresponding main valve 11.
Simultaneously; Three outlets 152 of one the 4th selector valve 15 are connected to first three filler openings 161 to the 3rd the 5th selector valve 16; Three outlets 152 of another the 4th selector valve 15 are connected to second three filler opening 161 to the 4th the 5th selector valve 16; Thereby first only is connected with one the 4th corresponding selector valve 15 with the 4th the 5th selector valve 16, and second be connected with two the 4th corresponding selector valves 15 with the 3rd the 5th selector valve 16 simultaneously.Utilize this Placement, can realize the control mouth of each said main valve 100 is connected to respectively independently the outlet of corresponding pilot valve 11, thereby each main valve 100 is moved independently; Can also realize simultaneously the control mouth of any two main valves 100 being connected to the outlet of corresponding pilot valve 11, thereby these two main valves 100 are moved simultaneously.Here four the 5th selector valves 16 are sorted, it should be understood that this ordering only is that four the 5th selector valves 16 are distinguished, rather than to the restriction of this technological scheme.For example, in orientation shown in Figure 5, four the 5th selector valves 16 can sort from left to right, and promptly Far Left is first the 5th selector valve, and rightmost is the 4th the 5th selector valve; Also can sort from right to left, promptly rightmost is first the 5th selector valve, and Far Left is the 4th the 5th selector valve.
Describe the running of guide oil control loop below with the mode that sorts from left to right in the orientation shown in Figure 5, promptly leftmost the 5th selector valve is first the 5th selector valve, and rightmost the 5th selector valve is the 4th the 5th selector valve.
When 100 actions of needs leftmost side main valve, the pilot valve 11 in left side is connected, and the pilot valve 11 on right side breaks off.The spool of the 4th selector valve 15 in left side is positioned at position, a left side; The guide oil of the pilot valve 11 on the left of therefore coming from flows to first the 5th selector valve 16 through the guide oil inlet 151 of the 4th selector valve 15 in left side with outlet 152; Flow to the control mouth of leftmost side main valve 100 by the 5th selector valve 16 control guide oils again, thereby realize control the action of this main valve 100.
When needs second main valve 100 action from left to right, the pilot valve 11 in left side is connected, and the pilot valve 11 on right side breaks off, and the spool of the 4th selector valve 15 in left side is positioned at meta, and the 4th selector valve 15 on right side breaks off.The guide oil of the pilot valve 11 on the left of therefore coming from flows to second the 5th selector valve 16 through the guide oil inlet 151 of the 4th selector valve 15 in left side with outlet 153; Flow to the control mouth of corresponding main valve 100 (promptly second main valve 100) from left to right again by the 5th selector valve 16 control guide oils, thereby realize control the action of this main valve 100.In addition, the pilot valve 11 in left side is broken off, the pilot valve 11 on right side is connected, and the 4th selector valve 15 in left side breaks off, and the 4th selector valve 15 on right side is in position, a left side.Therefore the guide oil inlet 151 of guide oil through the 4th selector valve 15 on right side that comes from the pilot valve 11 on right side flows to second the 5th selector valve 16 with outlet 152, thereby realizes the control to the main valve (second main valve 100 from left to right) of correspondence.
The control of the 3rd main valve and last main valve 100 from left to right can be repeated no more with reference to foregoing description here.
The outlet that simultaneously the control mouth of any two main valves 100 is connected to corresponding pilot valve 11 is described below, thus the situation that these two main valves 100 are moved simultaneously.
When needs when first main valve and second main valve 100 move simultaneously from left to right; The pilot valve 11 in left side is connected; The spool of the 4th selector valve 15 in left side is positioned at position, a left side; Thereby the guide oil of pilot valve 11 can flow to first the 5th selector valve 16 on the left of coming from, thereby control the action of first main valve 100; Simultaneously, the pilot valve 11 on right side is also connected, and the 4th selector valve 15 on right side also is positioned at left side position, thereby the guide oil that comes from right side pilot valve 11 can flow to second the 5th selector valve 16, and then the control action of second main valve 100 from left to right.This shows that first main valve can be supplied guide oils by different pilot valve 11 with second main valve 100 from left to right, thereby moves simultaneously.
When needs when first main valve and the 3rd main valve 100 move simultaneously from left to right; The pilot valve 11 in left side is connected; The spool of the 4th selector valve 15 in left side is positioned at position, a left side; Thereby the guide oil of pilot valve 11 can flow to first the 5th selector valve 16 on the left of coming from, thereby control the action of first main valve 100; Simultaneously, the pilot valve 11 on right side is also connected, and the 4th selector valve 15 on right side is positioned at meta, thereby the guide oil that comes from right side pilot valve 11 can flow to the 3rd the 5th selector valve 16, and then the control action of the 3rd main valve 100 from left to right.This shows that first main valve can be supplied guide oils by different pilot valve 11 with the 3rd main valve 100 from left to right, thereby moves simultaneously.
When needs when first main valve and the 4th main valve 100 move simultaneously from left to right; The pilot valve 11 in left side is connected; The spool of the 4th selector valve 15 in left side is positioned at position, a left side; Thereby the guide oil of pilot valve 11 can flow to first the 5th selector valve 16 on the left of coming from, thereby control the action of first main valve 100; Simultaneously, the pilot valve 11 on right side is also connected, and the 4th selector valve 15 on right side is positioned at right position, thereby the guide oil that comes from right side pilot valve 11 can flow to the 4th the 5th selector valve 16, and then the control action of the 4th main valve 100 from left to right.This shows that first main valve can be supplied guide oils by different pilot valve 11 with the 4th main valve 100 from left to right, thereby moves simultaneously.
When needs when second main valve and the 3rd main valve 100 move simultaneously from left to right; The pilot valve 11 in left side is connected; The spool of the 4th selector valve 15 in left side is positioned at meta; Thereby the guide oil of pilot valve 11 can flow to second the 5th selector valve 16 on the left of coming from, thereby control the action of second main valve 100; Simultaneously, the pilot valve 11 on right side is also connected, and the 4th selector valve 15 on right side is positioned at meta, thereby the guide oil that comes from right side pilot valve 11 can flow to the 3rd the 5th selector valve 16, and then the control action of the 3rd main valve 100 from left to right.This shows that second main valve can be supplied guide oils by different pilot valve 11 with the 3rd main valve 100 from left to right, thereby moves simultaneously.
Move simultaneously for second main valve and the 4th main valve 100 from left to right, and the 3rd main valve and the 4th situation that main valve 100 moves simultaneously from left to right, can repeat no more here with reference to foregoing description.
Can know according to above description; Utilize mode of execution shown in Figure 5; Can realize the independent control to each main valve 100, control when can also realize any two main valves in four main valves 100 100 is need to be adapted to the workplace of two main valve 100 cooperatings.
In addition; When any two main valves 100 are controlled; The guide oil that gets into the control mouth of these two main valves 100 comes from different pilot valve 11 respectively, owing to flow to the separate and mutual noninterference of the guide oil of control mouth of two main valves 100, and can be according to two main valves, 100 different working conditions needs; Control the displacement amount of corresponding main valve 100 valve rods through the oil pressure size of controlling corresponding pilot valve 11, and then realize respectively main valve 100 being carried out proportional control.
Certainly, the utility model is not limited to mode of execution shown in Figure 5.For example, the number N of main valve 100 can be 3,5, even more.The number of pilot valve 11 can be 1, can also be 3 or 4.Reversing arrangement can also have multiple variation pattern, and for example two the 4th selector valves 15 can be combined as a valve, and perhaps four the 5th selector valves 16 can two be combined as a selector valve etc.
But preferably, as shown in Figure 5, said the 4th selector valve 15 is a three-position four-way valve, and said the 5th selector valve 16 is a two-position four-way valve.The 4th selector valve 15 with or the control mode of the 5th selector valve 16 also can select according to concrete working condition, for example can be hand control valve or hydraulic control valve, but be preferably solenoid electric valve.
As stated; When at the same time the control mouth of any two main valves 100 being connected to the outlet of corresponding pilot valve 11; The control mouth of different main valves 100 can be connected with the outlet of same pilot valve 11, thereby supplies guide oil by same pilot valve 11 to different main valves.But preferably, the control mouth of different main valves 100 can connect with the outlet of different pilot valve 11 through reversing arrangement, thus by different pilot valve 11 to different main valve supply guide oils.
In addition; Though concrete mode of execution mainly is to be that example is described with the situation that simultaneously the control mouth of any two main valves 100 is connected to the outlet of corresponding pilot valve 11 in the specification; But the utility model is not limited to this; As stated, under the situation of a plurality of main valves 100, can realize selectively simultaneously will be arbitrarily at least two main valves 100 (any three, four ..., up to N all main valve 100) the control mouth be connected to the outlet of corresponding pilot valve 11.For example, when the control mouth of any three main valves 100 is connected in corresponding pilot valve simultaneously, be particularly useful for the occasion of three main valve coordinated of needs work, for example the workplace of machinery such as large excavator.
For another example; As shown in Figure 6; The number N of main valve 100 equals 5; The number M of said pilot valve 11 equals 5, and said reversing arrangement comprises 5 the 6th selector valves 17, and each the 6th selector valve 17 has the guide oil inlet that connects with the outlet of a corresponding pilot valve 11, the return opening that is connected with fuel tank and first guide oil that is connected with the control mouth of a corresponding main valve 100 respectively exports and second guide oil exports; Because first selector valve and the annexation of pilot valve and main valve are similar to the Placement of the 6th selector valve among Fig. 6 and corresponding pilot valve and main valve in Fig. 3, so in Fig. 6, do not mark each hydraulic fluid port of the 6th selector valve 17.Can be about the 6th selector valve and the annexation of corresponding pilot valve and main valve with reference to the mode of execution shown in Fig. 3.
In guide oil control loop shown in Figure 6; Each pilot valve 11 is controlled guide oil respectively and is flow to the 6th corresponding selector valve 17; By the corresponding main valve 100 of the 6th selector valve 17 control guide oils inflows one controls mouth again, and is back to fuel tank from another control mouth through the 6th selector valve 17.Therefore, when the 100 difference isolated operations of five main valves of needs, the independent control that can utilize each pilot valve 11 and the 6th corresponding selector valve 17 to realize to each main valve 100.In this case, the method for operation and the mode of execution shown in Fig. 3 of the main valve 100 of each operation are similar, no longer do detailed description here.
In addition, in guide oil control loop shown in Figure 6, can also realize the composition operation between any a plurality of main valve 100.Specifically; When for example two or three main valves 100 need to cooperate operation simultaneously; The self-corresponding pilot valve 11 of each of these a plurality of main valves 100 is connected (remaining pilot valve 11 can end) simultaneously, and the control that utilizes the 6th selector valve 17 separately to realize each main valve 100.
The situation of a plurality of main valve 100 cooperatings of this needs is common in large-scale engineering machinery, for example crane.In crane, above-mentioned five main valves 100 can be respectively flexible valve, the control shear leg arm width of cloth of the rotary valve that rotates on control hoist top, control shear leg fore and aft motion luffing valve, the main up-coiler of control the master winch valve and control the secondary elevator valve of secondary up-coiler.Utilize the cooperating of above-mentioned any a plurality of main valves, thereby accomplish the job requirement of machinery.Certainly, the application of the guide oil control loop described in this specification is not limited to hoist, also applicable to other application, like pump truck etc.
First selector valve 12, the 3rd selector valve 14, the 5th selector valve 16 that flow to the control mouth of main valve 100 as the control guide oil can be identical or similar selector valve with the 6th selector valve 17, as long as can realize its function.
For the convenience of describing, the term in mentioned expression orientation all is to describe with the position of orientation among each figure like " left side ", " right side " in this specification, and this should not be regarded as the restriction to the utility model.
More than combine accompanying drawing to describe the preferred implementation of the utility model in detail; But; The utility model is not limited to the detail in the above-mentioned mode of execution; In the technical conceive scope of the utility model, can carry out multiple simple variant to the technological scheme of the utility model, these simple variant all belong to the protection domain of the utility model.
Need to prove that in addition each the concrete technical characteristics described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner.For fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible compound modes.
In addition, also can carry out combination in any between the various mode of execution of the utility model, as long as its thought without prejudice to the utility model, it should be regarded as content disclosed in the utility model equally.
Claims (14)
1. guide oil control loop; This guide oil control loop comprises the pilot valve (11) that main valve (100) is connected with control mouth with this main valve (100); It is characterized in that said guide oil control loop also comprises reversing arrangement, said pilot valve (11) is connected with the control mouth of said main valve (100) through this reversing arrangement; And the ratio of the number M of the number N of said main valve (100) and said pilot valve (11) is greater than 1/2, and N and M are positive integer.
2. guide oil control loop according to claim 1; It is characterized in that; Said reversing arrangement has M guide oil inlet and 2N guide oil outlet; This M guide oil inlet is connected with the outlet of each said pilot valve (11) respectively, and said 2N guide oil outlet is connected with the control mouth of each said main valve (100) respectively.
3. guide oil control loop according to claim 1 and 2; It is characterized in that; The number N of said main valve (100) is 1; The number M of said pilot valve (11) is 1; Said reversing arrangement comprises one first selector valve (12), first guide oil outlet (123) and second guide oil outlet (124) that this first selector valve (12) has the guide oil inlet (121) that is connected with the outlet of said pilot valve (11), the return opening (122) that is connected with fuel tank and is connected with the control mouth of said main valve (100) respectively.
4. guide oil control loop according to claim 3; It is characterized in that; Said first selector valve (12) is a two-position four-way valve; When the spool of this two-position four-way valve was positioned at primary importance, said guide oil inlet (121) exported (123) with said first guide oil and is connected, and said return opening (122) exports (124) with said second guide oil and is connected; When the spool of said two-position four-way valve was positioned at the second place, said guide oil inlet (121) exported (124) with said second guide oil and is connected, and said return opening (122) exports (123) with said first guide oil and is connected.
5. guide oil control loop according to claim 1 and 2; It is characterized in that; The number N of said main valve (100) is not less than 2; The number M of said pilot valve (11) is not less than 1, and said reversing arrangement selectively is separately connected to the control mouth of each said main valve (100) respectively the outlet of corresponding pilot valve (11), perhaps selectively simultaneously arbitrarily the control mouth of at least two main valves (100) be connected to the outlet of corresponding pilot valve (11).
6. guide oil control loop according to claim 5; It is characterized in that; The number N of said main valve (100) is 2; The number M of said pilot valve (11) is 2, and said reversing arrangement is connected to the outlet of corresponding pilot valve (11) respectively independently with the control mouth of each said main valve (100), perhaps simultaneously the control mouth of each said main valve (100) is connected to the outlet of corresponding pilot valve (11).
7. guide oil control loop according to claim 6; It is characterized in that; Said reversing arrangement comprises one second selector valve (13) and two the 3rd selector valves (14), and this second selector valve (13) has two guide oil inlets (131,132) and two outlets (133; 134); Return opening (142) that each said the 3rd selector valve (14) has filler opening (141), connect with fuel tank and first guide oil outlet (143) that is connected with the control mouth of corresponding main valve (100) respectively export (144) with second guide oil, two guide oils of said second selector valve (13) enter the mouth (131,132) be connected with the outlet of said two pilot valves (11) respectively; Two outlets (133,134) of said second selector valve (13) are connected with the filler opening (141) of said two the 3rd selector valves (14) respectively.
8. guide oil control loop according to claim 6 is characterized in that, said second selector valve (13) is two-position four-way valve or three-position four-way valve, and said the 3rd selector valve (14) is a two-position four-way valve.
9. guide oil control loop according to claim 5; It is characterized in that; The number N of said main valve (100) is 4; The number M of said pilot valve (11) is 2, and said reversing arrangement is connected to the outlet of corresponding pilot valve (11) respectively independently with the control mouth of each said main valve (100), and control mouth that perhaps simultaneously will any two main valves (100) is connected to the outlet of the pilot valve (11) of correspondence.
10. guide oil control loop according to claim 9; It is characterized in that; Said reversing arrangement comprises two the 4th selector valves (15) and four the 5th selector valves (16); Each the 4th selector valve (15) has a guide oil inlet (151) and three outlets (152; 153; 154), return opening (162) that each the 5th selector valve (16) has filler opening (161), connect with fuel tank and first guide oil outlet (163) that is connected with the control mouth of corresponding main valve (100) respectively export (164) with second guide oil, the guide oil of said two the 4th selector valves (15) enter the mouth (151) be connected with the outlet of two pilot valves (11) respectively; Three outlets (152) of one the 4th selector valve (15) are connected to first three filler openings (161) to the 3rd the 5th selector valve (16), and three outlets (152) of another the 4th selector valve (15) are connected to second three filler opening (161) to the 4th the 5th selector valve (16).
11. guide oil control loop according to claim 10 is characterized in that, said the 4th selector valve (15) is a three-position four-way valve, and said the 5th selector valve (16) is a two-position four-way valve.
12. guide oil control loop according to claim 5; It is characterized in that; When at the same time the control mouth of any two main valves (100) being connected to the outlet of corresponding pilot valve (11), the outlet connection of the control mouth of different main valve (100) and different pilot valve (11).
13. guide oil control loop according to claim 5; It is characterized in that; The number M of the number N of said main valve (100) and said pilot valve (11) is 5; Said reversing arrangement comprises 5 the 6th selector valves (17), and each the 6th selector valve (17) has the guide oil inlet that connects with the outlet of a corresponding pilot valve (11), the return opening that is connected with fuel tank and first guide oil that is connected with the control mouth of a corresponding main valve (100) respectively exports and second guide oil exports.
14. guide oil control loop according to claim 1 is characterized in that, said pilot valve (11) is an electromagnetic proportional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202684549U CN202251166U (en) | 2011-07-27 | 2011-07-27 | Pilot oil control loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202684549U CN202251166U (en) | 2011-07-27 | 2011-07-27 | Pilot oil control loop |
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| Publication Number | Publication Date |
|---|---|
| CN202251166U true CN202251166U (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011202684549U Expired - Fee Related CN202251166U (en) | 2011-07-27 | 2011-07-27 | Pilot oil control loop |
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| CN (1) | CN202251166U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917111A (en) * | 2017-09-12 | 2018-04-17 | 上海立新液压有限公司 | A kind of efficient windlass valve group |
| CN110578728A (en) * | 2019-10-11 | 2019-12-17 | 广东冠邦科技有限公司 | Automatic change valve |
-
2011
- 2011-07-27 CN CN2011202684549U patent/CN202251166U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107917111A (en) * | 2017-09-12 | 2018-04-17 | 上海立新液压有限公司 | A kind of efficient windlass valve group |
| CN110578728A (en) * | 2019-10-11 | 2019-12-17 | 广东冠邦科技有限公司 | Automatic change valve |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20170727 |