CN204878102U - Novel load maintaining valve structure for excavator - Google Patents
Novel load maintaining valve structure for excavator Download PDFInfo
- Publication number
- CN204878102U CN204878102U CN201520471132.2U CN201520471132U CN204878102U CN 204878102 U CN204878102 U CN 204878102U CN 201520471132 U CN201520471132 U CN 201520471132U CN 204878102 U CN204878102 U CN 204878102U
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- abdominal cavity
- valve
- plug screw
- valve body
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- 210000000683 abdominal cavity Anatomy 0.000 claims abstract description 87
- 239000000945 filler Substances 0.000 claims description 29
- 238000013016 damping Methods 0.000 claims description 15
- 239000003921 oil Substances 0.000 description 19
- 238000007789 sealing Methods 0.000 description 12
- 239000010720 hydraulic oil Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
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- Operation Control Of Excavators (AREA)
Abstract
The utility model discloses a novel load maintaining valve structure for excavator, including valve body and the abdominal cavity of setting in the valve body, the abdominal cavity includes that first abdominal cavity and the second abdominal cavity that is located first abdominal cavity right side, this second abdominal cavity are linked together with first abdominal cavity, first celiac left side is provided with the cone valve core, and the right -hand member level of this cone valve core is provided with the fore -set, the right side of cone valve core is provided with the valve barrel, and the horizontal the central axis of this valve barrel goes up to open there is logical chamber, the fore -set runs through and is located logical intracavity, second abdominal cavity internalization is provided with the plunger, the area of plunger cross section is greater than the area of fore -set cross section. The utility model discloses a changing present load maintaining valve structure, can making spillage control within 2mlmin, settling amount that can the effective control swing arm is too big, the stability and the security that have improved the excavator.
Description
Technical field
The utility model relates to a kind of load holding valve, relates generally to a kind of dredger load holding valve structure.
Background technique
Load keeping system is a hydraulic system indispensable in excavator hydraulic system, for ensureing that excavator can keep a certain action for a long time, such as, in the excavator maintenance etc. of dipper and swing arm, it can ensure that excavator completes some basic lifting operation actions.And load holding valve is the parts of most critical in load keeping system, its quality directly has influence on the quality of excavator lifting operation, even can threaten the personal safety of staff.Therefore, the quality of load holding valve directly can have influence on the performance of load keeping system.
But the load holding valve that we use at present there is certain internal leakage and this internal leakage is larger.The settling amount that this larger internal leakage directly results in excavator boom and swing arm is comparatively large, affects working stability and the Security of excavator, also there is certain potential safety hazard simultaneously to staff.
Model utility content
The technical problems to be solved in the utility model is: provide a kind of dredger load holding valve structure, the internal leakage of this load holding valve structure is less, can control within 2ml/min, and then reaches the object controlling swing arm and sink.
In order to solve the problems of the technologies described above, the technical solution of the utility model is as follows:
A kind of dredger load holding valve structure, comprise valve body and be arranged on the abdominal cavity in valve body, described abdominal cavity comprises the first abdominal cavity and is positioned at the second abdominal cavity on the right side of the first abdominal cavity, this second abdominal cavity is connected with the first abdominal cavity, the left side in described first abdominal cavity is provided with poppet valve core, and the right-hand member of this poppet valve core has been horizontally disposed with fore-set;
The right side of described poppet valve core is provided with valve pocket, and the horizontal center line axis of this valve pocket has cavity, and described fore-set runs through and is positioned at cavity;
Be movably set with plunger in described second abdominal cavity, the area of described plunger cross section is greater than the area of fore-set cross section;
Described abdominal cavity also comprises the 3rd abdominal cavity, is movably set with pilot valve, is provided with guide's spring between this pilot valve and valve body in described 3rd abdominal cavity;
Described valve body is also provided with P1 filler opening and P2 filler opening, and described P1 filler opening is positioned at the left end of P2 filler opening and both are all connected with the 3rd abdominal cavity; When pilot valve moves right, P2 filler opening can be made to be communicated with the second abdominal cavity.
Further improve as the utility model, described valve body is also provided with the first plug screw, described first plug screw is positioned at the left side in the first abdominal cavity; The right-hand member of described first plug screw arranges damping spring, and described poppet valve core is provided with boss, and the left end of described poppet valve core passes damping spring and is positioned at the first plug screw, and described damping spring is between boss and the first plug screw.Arrange the first plug screw be convenient for changing and maintenance be positioned at the first Intraabdominal parts or cleaning abdominal cavity; Arrange damping spring poppet valve core can be made to complete automatically reset, form cone sealing configuration.
Further improve as the utility model, described valve body is also provided with the second plug screw, described second plug screw is positioned at the right side in the second abdominal cavity.Arrange the second plug screw can conveniently install and overhaul or change and be positioned at the second Intraabdominal parts, convenient and hommization.
Further improve as the utility model, the central axis of described pilot valve has discharge orifice; Described valve body is also provided with unloading port, and this unloading port is communicated with the second abdominal cavity by discharge orifice.Guide oil unnecessary in abdominal cavity can be discharged by this structure, prevent useless guide oil from hindering the movement of internal activity parts in abdominal cavity inner accumulated.
Contrast prior art, the beneficial effects of the utility model are:
The utility model is by changing existing load holding valve structure, when standard load keeps, the first abdominal cavity is made to be hyperbaric chamber, and then utilize high pressure to compress poppet valve core and valve pocket, and being not only the elastic force relying on damping spring, the larger sealing effect of load is better, and leakage rate can be made to control within 2ml/min, the settling amount that effectively can control swing arm is excessive, improves stability and the Security of excavator; When load maintenance removed by needs, acted on the plunger of certain area by guide oil, utilize the area ratio between plunger and fore-set, easily poppet valve core can be backed down, reach the object of pressure release, even when guide oil pressure is less, also can open load holding valve rapidly, make the timely pressure release of load holding valve, ensure that the quick response of action.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is schematic diagram of the present utility model;
In figure: 1, valve body, the 2, first abdominal cavity, the 3, second abdominal cavity, the 4, the 3rd abdominal cavity, 5, poppet valve core, 6, fore-set, 7, valve pocket, 8, cavity, 9, plunger, 10, pilot valve, 11, guide's spring, 12, P1 filler opening, 13, P2 filler opening, the 14, first plug screw, the 15, second plug screw, 16, damping spring, 17, boss, 18, discharge orifice, 19, unloading port, the 20, first overflow hole, the 21, second overflow hole.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in more detail.
Embodiment one
As shown in Figure 1, the utility model provides a kind of dredger load holding valve structure, the abdominal cavity comprising valve body 1 and be arranged in valve body 1, the second abdominal cavity 3 that described abdominal cavity comprises the first abdominal cavity 2 and is positioned on the right side of the first abdominal cavity 2, this first abdominal cavity 2 is connected with the second abdominal cavity 3.
As shown in Figure 1, poppet valve core 5 and valve pocket 7 is from left to right disposed with in the first abdominal cavity 2.The right-hand member of poppet valve core 5 has been horizontally disposed with fore-set 6, and this poppet valve core 5 activity is positioned at the first abdominal cavity 2; The horizontal center line axis of valve pocket 7 has cavity 8, described fore-set 6 runs through and is positioned at cavity 8 and its length is longer than the length of cavity 8.
First abdominal cavity 2 is provided with the first overflow hole 20, first overflow hole 20 is connected with the working oil path of excavator load as parts such as swing arms, ensure that the hydraulic oil in oil duct can enter into formation high pressure in the first abdominal cavity 2, and then make to be formed between poppet valve core 5 and valve pocket 7 to bore sealing configuration.The hydraulic oil being entered into the first abdominal cavity 2 by the first overflow hole 20 carries out pressurize in the first abdominal cavity 2, makes the first abdominal cavity 2 form hyperbaric chamber.Fact proved, the pressure in the first abdominal cavity 2 is larger, and that is induced pressure is larger, and the sealability between poppet valve core 5 and valve pocket 7 is better.Fact proved, maintaining valve internal leakage can be made like this to control within 2ml/min, effectively reduce the settling amount of swing arm, the settling amount of swing arm is controlled effectively, improve stability and the Security of excavator.Valve pocket 7 is provided with the second overflow hole 21, ensure that the hydraulic oil entered in the first abdominal cavity 2 can flow out from the second overflow hole 21, and then complete the pressure leak process to the first abdominal cavity 2.
As shown in Figure 1, slide in the second abdominal cavity 3 and be provided with plunger 9, the cross sectional area of described plunger 9 is greater than the cross sectional area of fore-set 6.This structure makes to form area ratio between plunger 9 and fore-set 6, can push up fore-set 6 to left end very easily like this, and then can open the cone sealing configuration formed between poppet valve core 5 and valve pocket 7.This structure can ensure under lower pilot pressure, also cone sealing configuration can be opened fast, make the timely pressure release of load holding valve, ensure that the quick response of action.
As shown in Figure 1, described abdominal cavity also comprises the 3rd abdominal cavity 4, is movably set with pilot valve 10, is provided with guide's spring 11 between this pilot valve 10 and valve body 1 in described 3rd abdominal cavity 4.Pilot valve can be made automatically to complete reset by the elastic restoring force of guide's spring.
As shown in Figure 1, described valve body 1 is also provided with P1 filler opening 12 and P2 filler opening 13, and described P1 filler opening 12 is positioned at the left end of P2 filler opening 13 and both are all connected with the 3rd abdominal cavity 4.Described P1 filler opening 12 is communicated with pilot-actuated valve, and when pilot-actuated valve obtains control signal, P1 filler opening 12 can be made to pass into the guide oil of 3.9Mpa, described P2 filler opening 13 is communicated with gear pump, makes P2 filler opening 13 pass into the guide oil of 3.9Mpa all the time.Before P1 filler opening 12 does not pass into guide oil, pilot valve 10 is positioned at the left end in the 3rd abdominal cavity 4 under the effect of first guided missile spring 11, P2 filler opening 13 is not communicated with the second abdominal cavity 3, when pilot-actuated valve obtains signal work, guide oil flows into the 3rd abdominal cavity 4 by P1 filler opening 12, pilot valve 10 moves right under the effect of guide oil, P2 filler opening 13 can be made to be communicated with the second abdominal cavity 3, now the second abdominal cavity 3 has passed into guide oil, guide oil promotes plunger 9 toward moving left, plunger 9 and then contact with fore-set 6 and pushed up to left end, bores sealing configuration the most at last and opens.After cone sealing configuration is opened, in the first abdominal cavity 2, hydraulic oil is flowed out by the cavity 8 on valve pocket 7, and the pressure energy of hydraulic oil accesses release, and load holding valve pressure release completes.
As shown in Figure 1, valve body 1 is also provided with the right side that the second plug screw 15, second plug screw 15 is positioned at the second abdominal cavity 3.Arrange the second plug screw 15 can conveniently install parts such as plungers, overhaul or change, convenient and hommization.
The utility model excavator load holding valve structure, change old-fashioned load holding valve and depend merely on spring force to compress the structure of poppet valve core, utilize load the first abdominal cavity can be made to become hyperbaric chamber as swing arm etc., utilize high pressure liquid force feed poppet valve core can be pressed on valve pocket firmly.The pressure of load is larger, and the sealing effect of generation is more obvious, the leakage rate in valve can be controlled within 2ml/min, and then effectively can control the settling amount that dynamic load produces as swing arm, improves stability and the Security of excavator.When needing to discharge the pressure in load holding valve, guide oil can be made to act on plunger, the cross sectional area that cross sectional area due to plunger is greater than fore-set creates certain area ratio, even if also can easily, fast be opened by sealing configuration when the pressure of guide oil is less, ensure that the corresponding fast of action.
Embodiment two
The utility model provides a kind of dredger load holding valve structure, and structure is as described in embodiment one, and its difference is: as shown in Figure 1, and valve body 1 is also provided with the first plug screw 14, and this first plug screw 14 is positioned at the left side in the first abdominal cavity 2; The right-hand member of the first plug screw 14 is provided with damping spring 16, and described poppet valve core 5 is provided with boss 17, and the left end of described poppet valve core 5 passes damping spring 16 and is positioned at the first plug screw 14, and described damping spring 16 is between boss 17 and the first plug screw 14.When plunger 9 promote poppet valve core 5 be moved to the left time, the boss 17 compression damping spring 16 cone sealing configuration that poppet valve core 5 and valve pocket 7 are formed simultaneously is opened, now the first Intraabdominal high pressure oil enters in the cavity 8 of valve pocket 7, then the earth pressure release that hydraulic oil keeps is fallen, thus complete the pressure leak process of load holding valve.When P1 filler opening does not pass into guide oil, pilot valve 10 sets back under the effect of first guided missile spring 11, and P2 filler opening 13 and the second abdominal cavity 3 are disconnected, and plunger 9 loses the Driving force to poppet valve core 5.Now because damping spring 16 is in compressive state, poppet valve core 5 can under the elastic restoring force effect of damping spring 16 under move to right, and then make to recover between poppet valve core 5 and valve pocket 7 to bore sealing configuration.
Embodiment three
The utility model provides a kind of New type conical sealing configuration, and structure is as described in embodiment one, and its difference is: as shown in Figure 1, the central axis of pilot valve 10 has discharge orifice 18; Described valve body 1 is also provided with unloading port 19, and this unloading port 19 is communicated with the second abdominal cavity 3 by overflow hole 18.Discharge orifice 18 can be got rid of gathering the unnecessary hydraulic oil be stored in the second abdominal cavity 3, ensures that the movement of plunger 9 completes smoothly.
Working principle of the present utility model is as follows:
(1) when load keeps as swing arm etc., the first abdominal cavity 2 is hyperbaric chamber, and poppet valve core 5 is pressed on valve pocket 7 by hydraulic oil; Amount of leakage in load holding valve can control within 2ml/min by this structure.
(2) P1 filler opening 12 passes into guide oil and promotes pilot valve 10 and move to right, and then is communicated with the second abdominal cavity 3 by P2 filler opening 13, and the guide oil in P2 filler opening 13 enters the second abdominal cavity 3 and promotes plunger 9 and be moved to the left.
(3) plunger 9 contacts with fore-set 6 and promotes poppet valve core 5 and is moved to the left, and the cone that poppet valve core 5 and valve pocket 7 are formed seals to be opened, and the hydraulic oil in the first abdominal cavity 2 is flowed out by the cavity 8 on valve pocket 7, finally completes the pressure release of load holding valve.
It should be noted that the present embodiment one is most preferred mode of execution of the present utility model, be not restriction the utility model being made to other form, any those skilled in the art of belonging to may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent implementations of equivalent variations.But every do not depart from the prerequisite of the utility model know-why under, any simple modification, equivalent variations and the remodeling done above mode of execution according to technical spirit of the present utility model, all should fall into the utility model scope of patent protection.
Claims (4)
1. a dredger load holding valve structure, the abdominal cavity comprising valve body (1) and be arranged in valve body (1), it is characterized in that: described abdominal cavity comprises the first abdominal cavity (2) and is positioned at second abdominal cavity (3) on right side, the first abdominal cavity (2), this second abdominal cavity (3) is connected with the first abdominal cavity (2), the left side of described first abdominal cavity (2) is provided with poppet valve core (5), and the right-hand member of this poppet valve core (5) has been horizontally disposed with fore-set (6);
The right side of described poppet valve core (5) is provided with valve pocket (7), the horizontal center line axis of this valve pocket (7) has cavity (8), and described fore-set (6) runs through and is positioned at cavity (8);
Be movably set with plunger (9) in described second abdominal cavity (3), the area of described plunger (9) cross section is greater than the area of fore-set (6) cross section;
Described abdominal cavity also comprises the 3rd abdominal cavity (4), is movably set with pilot valve (10), is provided with guide's spring (11) between this pilot valve (10) and valve body (1) in described 3rd abdominal cavity (4);
Described valve body (1) is also provided with P1 filler opening (12) and P2 filler opening (13), and described P1 filler opening (12) is positioned at the left end of P2 filler opening (13) and both are all connected with the 3rd abdominal cavity (4); When pilot valve (10) moves right, P2 filler opening (12) can be made to be communicated with the second abdominal cavity (3).
2. dredger load holding valve structure according to claim 1, it is characterized in that: described valve body (1) is also provided with the first plug screw (14), described first plug screw (14) is positioned at the left side of the first abdominal cavity (2); The right-hand member of described first plug screw (14) arranges damping spring (16), described poppet valve core (5) is provided with boss (17), the left end of described poppet valve core (5) passes damping spring (16) and is positioned at the first plug screw (14), and described damping spring (16) is positioned between boss (17) and the first plug screw (14).
3. dredger load holding valve structure according to claim 1, it is characterized in that: described valve body (1) is also provided with the second plug screw (15), described second plug screw (15) is positioned at the right side of the second abdominal cavity (3).
4. dredger load holding valve structure according to claim 1, is characterized in that: the central axis of described pilot valve (10) has discharge orifice (18); Described valve body (1) is also provided with unloading port (19), this unloading port (19) is communicated with the second abdominal cavity (3) by discharge orifice (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520471132.2U CN204878102U (en) | 2015-07-03 | 2015-07-03 | Novel load maintaining valve structure for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520471132.2U CN204878102U (en) | 2015-07-03 | 2015-07-03 | Novel load maintaining valve structure for excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204878102U true CN204878102U (en) | 2015-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520471132.2U Active CN204878102U (en) | 2015-07-03 | 2015-07-03 | Novel load maintaining valve structure for excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204878102U (en) |
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2015
- 2015-07-03 CN CN201520471132.2U patent/CN204878102U/en active Active
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| RINS | Preservation of patent right or utility model and its discharge | ||
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