CN220792166U - Integral multi-way valve and excavator - Google Patents
Integral multi-way valve and excavator Download PDFInfo
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- CN220792166U CN220792166U CN202322570191.2U CN202322570191U CN220792166U CN 220792166 U CN220792166 U CN 220792166U CN 202322570191 U CN202322570191 U CN 202322570191U CN 220792166 U CN220792166 U CN 220792166U
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- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to an integral multi-way valve and an excavator, which comprises a valve body, a plurality of valve cores and a control handle; the valve body is an integrated valve body, the valve body is provided with a total oil inlet and a total oil outlet, a total oil way is formed between the total oil inlet and the total oil outlet, and the total oil way comprises an upper-layer total oil way and a lower-layer total oil way which are arranged in parallel; a hydraulic control flow passage is formed between the first reversing oil port and the second reversing oil port outside the valve body; the valve body is provided with an oil return way corresponding to the first reversing oil port and the second reversing oil port respectively; a one-way valve channel is arranged below each first valve core channel and each second valve core channel respectively, a one-way valve is arranged in each one-way valve channel, and a lower layer total oil way is sequentially communicated with the one-way valve channels; when the valve body moves, the upper layer total oil way is closed, and the pressure increase one-way valve in the lower layer total oil way is opened to realize oil supply. The utility model adopts the integrated multi-way valve, reduces the overall weight of the valve, also avoids the problem of leakage inside the valve body, optimizes the oil way and ensures the balance of flow.
Description
Technical Field
The utility model relates to the field of hydraulically-controlled multi-way valves, in particular to an integral multi-way valve and an excavator.
Background
The multi-way valve is a combined valve with two or more reversing valves as main bodies, is used for controlling the movement of a plurality of executing elements, and is commonly used for hydraulic control of mechanical arms of an excavator and the like. The structure of the general multi-way valve comprises a plurality of reversing valve bodies which are arranged side by side, all the reversing valve bodies are assembled together in series through bolts, each reversing valve body is provided with a valve core respectively, and corresponding hydraulic control is realized by controlling the valve cores of the corresponding reversing valve bodies. In the prior art, as disclosed in the utility model patent with publication number of CN 204512531U, a multi-way valve for a small excavator is formed by connecting 2 oil inlet valve bodies, 7 reversing valve bodies, 2 manual reversing valve bodies and 1 oil return valve body in series through bolts, and the functions of swinging arms, pushing shovels, bucket arms, walking left and right, turning and the like of the small excavator are realized by controlling the corresponding valves.
For small and miniature excavators (generally, the miniature excavator is under 2 tons and the miniature excavator is under 6 tons), the conventional multiway valve can achieve the control purpose, but the design of the valve body is heavy on one hand and the problem of hydraulic oil leakage easily occurs; in addition, the existing multi-way valve generally operates one handle at a time when in operation, if two handles are operated simultaneously, hydraulic pressure is possibly insufficient, and the two handles cannot be operated simultaneously, so that the operation efficiency is reduced.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the integral multi-way valve and the excavator, and the integral multi-way valve is adopted, so that the overall weight of the valve is reduced, and the problem of leakage inside the valve body is avoided.
The technical purpose of the utility model is realized by the following technical scheme:
the utility model provides an excavator, wherein a multi-way valve for controlling a hydraulic system of the excavator is arranged on the excavator, and the multi-way valve comprises a valve body, a plurality of valve cores and a control handle;
the valve body is an integrated valve body, a total oil inlet and a total oil outlet are respectively arranged at two ends of the valve body, a total oil path is formed between the total oil inlet and the total oil outlet, the total oil path comprises an upper-layer total oil path and a lower-layer total oil path, and the upper-layer total oil path and the lower-layer total oil path are arranged in parallel;
a plurality of first valve core channels and a plurality of second valve core channels are sequentially arranged in the valve body along an upper layer total oil way from the total oil inlet to the total oil outlet;
the control handle is used for adjusting the position of the valve core in the first valve core channel or the second valve core channel, the first valve core channel and the second valve core channel both comprise a first reversing oil port and a second reversing oil port, and a hydraulic control flow channel is formed between the first reversing oil port and the second reversing oil port outside the valve body; the valve body is provided with an oil return way corresponding to the first reversing oil port and the second reversing oil port respectively, and the oil return way is communicated with the total oil return port;
a one-way valve channel is arranged below each first valve core channel and below a first valve core channel and a second valve core channel adjacent to the first valve core channel respectively, one-way valves are arranged on two sides of a lower layer total oil way in the one-way valve channel respectively corresponding to the first reversing oil port and the second reversing oil port, and the lower layer total oil way is sequentially communicated with the one-way valve channels;
the valve core comprises three state positions in the valve body:
when the valve core is positioned in the middle position, a hydraulic control flow passage between the first reversing oil port and the second reversing oil port is disconnected from the total oil way;
when the valve core moves towards the first reversing oil port, the upper layer total oil way is closed, the hydraulic control flow passage is communicated with the lower layer total oil way and forms a hydraulic flow direction of the second reversing oil port towards the first reversing oil port, and the first reversing oil port is communicated with the corresponding oil return oil way;
when the valve core moves towards the second reversing oil port, the upper layer total oil way is closed, the hydraulic control flow passage is communicated with the lower layer total oil way and forms a hydraulic flow direction of the first reversing oil port towards the second reversing oil port, and the second reversing oil port is communicated with the corresponding oil return oil way.
Further, the first valve core channel and the second valve core channel comprise a first oil groove arranged in the middle of the valve core channel, a second oil groove, a third oil groove, a fourth oil groove and a fifth oil groove are sequentially arranged along the first oil groove towards one end of the valve core channel, and a sixth oil groove, a seventh oil groove, an eighth oil groove and a ninth oil groove are sequentially arranged along the first oil groove towards the other end of the valve core channel; the caliber of the first oil groove, the second oil groove, the third oil groove, the fourth oil groove, the fifth oil groove, the sixth oil groove, the seventh oil groove, the eighth oil groove and the ninth oil groove is larger than that of the valve core channel;
y-shaped oil channels are respectively connected between the total oil inlet and the first valve core channel, between the adjacent first valve core channels and the second valve core channel and between the adjacent second valve core channels.
Further, the valve core comprises a valve rod, a first slide valve is arranged along the middle part of the valve rod, a second slide valve and a third slide valve are sequentially arranged along the first slide valve towards one end of the valve rod, and a fourth slide valve and a fifth slide valve are sequentially arranged along the first slide valve towards the other end of the valve rod; the first spool valve is a spool valve in the form of a spool valve, and the second, third, fourth and fifth spool valves are spool valves in the form of spool valves.
Further, the Y-shaped oil duct comprises a first oil inlet end, a first oil outlet end and a second oil outlet end;
the main oil inlet is connected with a first oil inlet end, the first oil outlet end is connected with a second oil groove, and the second oil outlet end is connected with a sixth oil groove;
between adjacent first valve core channels, a first oil groove of a previous first valve core channel is connected with a first oil inlet end, a first oil outlet end is connected with a second oil groove of a next first valve core channel, and a second oil outlet end is connected with a sixth oil groove of the next first valve core channel;
between the adjacent first valve core channel and second valve core channel, the first oil groove of the first valve core channel is connected with the first oil inlet end, the first oil outlet end is connected with the second oil groove of the second valve core channel, and the second oil outlet end is connected with the sixth oil groove of the second valve core channel;
between adjacent second valve core channels, the first oil groove of the former second valve core channel is connected with the first oil inlet end, the first oil outlet end is connected with the second oil groove of the next second valve core channel, and the second oil outlet end is connected with the sixth oil groove of the next second valve core channel.
Further, the third oil groove and the seventh oil groove of the first valve core channel are respectively connected with the one-way valve channel; the third oil groove and the seventh oil groove of the first second valve core channel adjacent to the first valve core channel are respectively connected with the one-way valve channel; the check valve channel is internally provided with check valves corresponding to the third oil groove and the seventh oil groove respectively; and a third oil groove between adjacent second valve core channels is communicated, and a seventh oil groove between adjacent second valve core channels is communicated.
Further, when the valve core is positioned in the middle position, the one-way valve is closed, and when the valve core moves towards the first reversing oil port or the second reversing oil port, the hydraulic pressure in the lower layer total oil way is increased, and the one-way valve is opened.
Further, when the valve core is positioned at the middle position, the first slide valve is arranged in the middle of the first oil groove, the second slide valve and the third slide valve block the two ends of the fourth oil groove, and the fourth slide valve and the fifth slide valve block the two ends of the eighth oil groove;
when the valve core moves towards the direction of the first reversing oil port, the first slide valve and the fourth slide valve plug two ends of the first oil groove, the upper layer total oil way is closed, the fourth oil groove is communicated with the fifth oil groove, and the seventh oil groove is communicated with the eighth oil groove;
when the valve core moves towards the direction of the second reversing oil port, the first slide valve and the second slide valve plug two ends of the first oil groove, the upper layer total oil way is closed, the third oil groove is communicated with the fourth oil groove, and the eighth oil groove is communicated with the ninth oil groove.
Further, a safety valve runner communicated with the total oil way is arranged in the valve body, and a safety valve for preventing the oil pressure in the valve body from exceeding a set threshold value is arranged in the safety valve runner; an unloading flow passage used for flowing back after overflow and internal leakage of hydraulic oil in the first valve core passage or the second valve core passage is also arranged in the valve body, and the unloading flow passage is communicated with the safety valve flow passage and the total oil passage.
Further, the number of the first valve core channels is 5, and the number of the second valve core channels is 3.
Compared with the prior art, the utility model has the beneficial effects that:
1. the utility model adopts a casting mode to take the valve body as an integral structure, and saves a large number of accessory installation compared with a split structure, thereby reducing the weight of the whole multi-way valve.
2. The original multi-way valve has the problems that the deviation of two paths of hydraulic systems occurs when the control of the multi-way valve needs two paths of parallel hydraulic systems due to the non-uniformity of the oil path flow, such as a forward system, and the deviation easily occurs, so that the safety accident is caused; the oil way design in the utility model ensures that one valve core is operated and the other valve cores are operated to supply oil at the same time, thereby effectively solving the problem that two valve cores cannot be operated at the same time due to insufficient hydraulic pressure and improving the operation efficiency.
3. The original multi-way valve cannot control two valve cores simultaneously, in order to control the two valve cores simultaneously, the prior art adopts the valve cores for each way to be manufactured independently, so that the processing cost of the multi-way valve is increased, the shape of the valve core is matched with the shape of a valve core channel, and the processing and manufacturing cost is increased; through the design of oil circuit in this application, adopt unified case passageway and case, reduced the cost of processing, the suitability of case and case passageway promotes greatly when installing the case.
4. The multi-way valve can be installed on the existing excavator according to the requirement, can be directly used for replacing the multi-way valve on the existing excavator, and is convenient for users to use.
Drawings
Fig. 1 is a schematic view of an integral multi-way valve according to the present utility model.
Fig. 2 is a schematic side view of a valve body in the present utility model.
FIG. 3 is a schematic view of the valve core structure in the present utility model.
Fig. 4 is a schematic view of the first spool passage and the second spool passage according to the present utility model.
Fig. 5 is a schematic cross-sectional view of the valve body of the present utility model at the first spool passage and the second spool passage.
Fig. 6 is a schematic view of a Y-type oil passage structure in the present utility model.
FIG. 7 is a schematic illustration of the connection between adjacent first spool passages in the present utility model.
FIG. 8 is a schematic illustration of the connection between adjacent first and second spool passageways in the present utility model.
FIG. 9 is a schematic illustration of the connection between adjacent second spool passageways in the present utility model.
FIG. 10 is a schematic view of the first spool in the first spool passage of the present utility model in neutral position.
Fig. 11 is a schematic view showing movement of the spool in the first spool passage toward the first pilot port in the present utility model.
Fig. 12 is a schematic view of the hydraulic flow in the state of fig. 11 according to the present utility model.
Fig. 13 is a schematic view showing movement of a spool in a first spool passage toward a second pilot port in the present utility model.
Fig. 14 is a schematic view of the hydraulic flow in the state of fig. 13 according to the present utility model.
Fig. 15 is a schematic diagram of the hydraulic flow direction when the spool in the second spool passage moves toward the first pilot port in the present utility model.
Fig. 16 is a schematic diagram of the hydraulic flow direction when the spool in the second spool passage moves toward the second pilot port in the present utility model.
Fig. 17 is a schematic view of the joystick structure in embodiment 2 of the present utility model.
In the figure, 1, a valve body; 2. a valve core; 3. a manipulation handle; 4. a main oil inlet; 5. a total oil outlet; 6. a first spool passage; 7. a second spool passage; 8. a first reversing oil port; 9. the second reversing oil port; 10. an oil return path; 11. a one-way valve passage; 12. a valve stem; 13. a first spool valve; 14. a second spool valve; 15. a third spool valve; 16. a fourth spool valve; 17. a fifth spool valve; 18. a first oil groove; 19. a second oil groove; 20. a third oil groove; 21. a fourth oil groove; 22. a fifth oil groove; 23. a sixth oil groove; 24. a seventh oil groove; 25. an eighth oil groove; 26. a ninth oil groove; 27. y-shaped oil duct; 28. a first oil inlet end; 29. a first oil outlet end; 30. the second oil outlet end; 31. a lower layer total oil path; 32. a safety valve flow passage; 33. a safety valve; 34. unloading the runner; 35. an end rod knuckle bearing; 36. and a linkage plate.
Detailed Description
The technical scheme of the utility model is further described below with reference to the specific embodiments:
example 1
An integral multi-way valve, as shown in figure 1, comprises a valve body 1, a plurality of valve cores 2 and a control handle 3;
the valve body is an integrated valve body, the valve body 1 is integrally formed by casting, a total oil inlet 4 and a total oil outlet 5 are respectively arranged at two ends of the valve body, a P mark is generally arranged at the total oil inlet 4, a T mark is arranged at the total oil outlet 5, a total oil way is formed between the total oil inlet 4 and the total oil outlet 5, the total oil way comprises an upper-layer total oil way and a lower-layer total oil way, and the upper-layer total oil way and the lower-layer total oil way are arranged in parallel; when the hydraulic pump is used, the main oil inlet 4 is connected with the hydraulic pump, the main oil outlet 5 is connected with the oil tank, and hydraulic oil in the oil tank is circulated through the main oil way by the hydraulic pump.
A plurality of first valve core channels 6 and a plurality of second valve core channels 7 are sequentially arranged in the valve body 1 from the total oil inlet 4 to the total oil outlet 5 along an upper layer total oil way;
the control handle 3 is used for adjusting the position of the valve core 2 in the first valve core channel 6 or the second valve core channel 7, and one valve core is generally provided with one control handle 3, and the control handle 3 enables the valve core to move back and forth in a lever mode; the first valve core channel 6 and the second valve core channel 7 have the same structure and comprise a first reversing oil port 8 and a second reversing oil port 9, and a hydraulic control flow passage is formed between the first reversing oil port 8 and the second reversing oil port 9 outside the valve body: specifically, when in use, the first reversing oil port 8 and the second reversing oil port 9 are required to be connected to a hydraulic mechanism to be controlled, such as a hydraulic cylinder, and the control of the hydraulic mechanism is realized by changing the hydraulic flow direction; the valve body 1 is provided with an oil return way 10 corresponding to the first reversing oil port 8 and the second reversing oil port 9 respectively, and the oil return way 10 is communicated with the total oil return port 5;
as shown in fig. 2, a check valve channel 11 is respectively arranged below each first valve core channel 6 and below a first second valve core channel 7 adjacent to the first valve core channel 6, in this embodiment, the number of the first valve core channels is 5, the number of the second valve core channels is 3, and one check valve channel 11 is respectively arranged below the rest of the first valve core channels 6 and below the second valve core channels 7 except that the two second valve core channels 7 close to the total oil outlet 5 are not provided with check valve channels; the two sides of the lower layer total oil way in the check valve channel 11 are respectively provided with a check valve corresponding to the first reversing oil port 8 and the second reversing oil port 9, and the lower layer total oil way is sequentially communicated with the check valve channel 11;
as shown in fig. 3, the valve core 2 comprises a valve rod 12, a first slide valve 13 is arranged along the middle part of the valve rod 12, a second slide valve 14 and a third slide valve 15 are sequentially arranged along the first slide valve 13 towards one end of the valve rod 12, and a fourth slide valve 16 and a fifth slide valve 17 are sequentially arranged along the first slide valve 13 towards the other end of the valve rod 12; the first spool valve 13 is a spool valve in the form of a spool valve, and the second spool valve 14, the third spool valve 15, the fourth spool valve 16, and the fifth spool valve 17 are spool valves.
First spool passage 6 and second spool passage 7 as shown in fig. 4, each of first spool passage 6 and second spool passage 7 includes a first oil groove 18 provided in the middle of the spool passage, a second oil groove 19, a third oil groove 20, a fourth oil groove 21 and a fifth oil groove 22 are provided in this order along the first oil groove toward one end of the spool passage, and a sixth oil groove 23, a seventh oil groove 24, an eighth oil groove 25 and a ninth oil groove 26 are provided in this order along the first oil groove 18 toward the other end of the spool passage; the diameters of the first oil groove 18, the second oil groove 19, the third oil groove 20, the fourth oil groove 21, the fifth oil groove 22, the sixth oil groove 23, the seventh oil groove 24, the eighth oil groove 25, and the ninth oil groove 26 are larger than the diameters of the first spool passage 6 and the second spool passage 7. The fifth oil groove 22 and the ninth oil groove 26 are connected to the corresponding return oil passage 10, respectively.
As shown in fig. 5, Y-shaped oil passages 27 are respectively connected between the total oil inlet 4 and the first spool passage 6, between adjacent first spool passages 6 and the second spool passage 7, and between adjacent second spool passages 7.
The Y-shaped oil duct is shown in FIG. 6 and comprises a first oil inlet end 28, a first oil outlet end 29 and a second oil outlet end 30; the Y-shaped oil duct 27 is connected with the first valve core channel 6 and the second valve core channel 7 to form an upper layer total oil duct;
between the total oil inlet 4 and the first valve core channel 6, the total oil inlet 4 is connected with a first oil inlet end 28, a first oil outlet end 29 is connected with a second oil groove 19, and a second oil outlet end 30 is connected with a sixth oil groove 23;
as shown in fig. 7, between adjacent first valve core passages 6, the first oil groove 18 of the previous first valve core passage is connected to the first oil inlet end 28, the first oil outlet end 29 is connected to the second oil groove 19 of the next first valve core passage 6, and the second oil outlet end 30 is connected to the sixth oil groove 23 of the next first valve core passage 6;
as shown in fig. 8, between the adjacent first spool passage 6 and second spool passage 7, the first oil groove 18 of the first spool passage 6 is connected to the first oil inlet end 28, the first oil outlet end 29 is connected to the second oil groove 19 of the second spool passage 7, and the second oil outlet end 30 is connected to the sixth oil groove 23 of the second spool passage 7;
as shown in fig. 9, between the adjacent second spool passages 7, the first oil groove 18 of the previous second spool passage 7 is connected to the first oil inlet end 28, the first oil outlet end 29 is connected to the second oil groove of the next second spool passage, and the second oil outlet end is connected to the sixth oil groove of the next second spool passage.
The third oil groove 20 and the seventh oil groove 24 of the first spool passage 6 are respectively connected to the check valve passage 11 as shown in fig. 12; the third oil groove 6 and the seventh oil groove 24 of the first second spool passage 7 adjacent to the first spool passage 6 are respectively connected to the check valve passage 11, referring to fig. 12; check valves are respectively arranged in the check valve channels 11 corresponding to the third oil groove 20 and the seventh oil groove 24; the third oil grooves 6 between the adjacent second spool passages 7 communicate, and the seventh oil grooves 24 between the adjacent second spool passages 7 communicate, as shown in fig. 9. When the valve core is positioned in the middle position, the one-way valve is closed, and when the valve core moves towards the first reversing oil port or the second reversing oil port, the hydraulic pressure in the lower layer total oil way 31 is increased, and the one-way valve is opened.
The valve spool 2 comprises three state positions within the valve body, taking the first spool passage 6 as an example:
as shown in fig. 10, when the spool 2 is at the neutral position, the first spool valve 13 is placed in the middle of the first oil groove 18, the second spool valve 14 and the third spool valve 15 block both ends of the fourth oil groove 21, the fourth spool valve 16 and the fifth spool valve 17 block both ends of the eighth oil groove 26, and the hydraulic control flow passage between the first reversing oil port 8 and the second reversing oil port 9 is disconnected from the total oil passage; hydraulic oil flows from the total oil inlet 4 along the total oil path toward the total oil outlet 5.
As shown in fig. 11 and 12, after the valve core 2 moves towards the first reversing oil port 8, the first slide valve 13 and the fourth slide valve 16 seal two ends of the first oil groove 18, the upper layer total oil path is sealed, the fourth oil groove 21 is communicated with the fifth oil groove 22, the seventh oil groove 25 is communicated with the eighth oil groove 26, the upper layer total oil path is sealed, the hydraulic control flow passage is communicated with the lower layer total oil path and forms a hydraulic flow direction of the second reversing oil port 9 towards the first reversing oil port 8, and the first reversing oil port 8 is communicated with the corresponding return oil path 10 through the fifth oil groove 22; the lower total oil passage 31 supplies oil to the eighth oil groove 25 through the seventh oil groove 24, and flows to the return oil passage 10 after passing through the fourth oil groove 21 and the fifth oil groove 22 during oil return.
As shown in fig. 13 and 14, after the valve core moves towards the second reversing oil port 9, the first slide valve 13 and the second slide valve 14 seal two ends of the first oil groove 18, the upper layer total oil path is closed, the third oil groove 20 is communicated with the fourth oil groove 21, the eighth oil groove 26 is communicated with the ninth oil groove 27, the upper layer total oil path is closed, the hydraulic control flow passage is communicated with the lower layer total oil path 31 and forms a hydraulic flow direction of the first reversing oil port 8 towards the second reversing oil port 9, and the second reversing oil port 9 is communicated with the corresponding return oil path 10 through the ninth oil groove 26; the lower layer total oil passage supplies oil to the fourth oil groove 21 through the third oil groove 20, and flows to the return oil passage 10 after passing through the eighth oil groove 25 and the ninth oil groove 26 during oil return.
Taking the second valve core channel as an example, the three positions of the valve core in the first second valve core channel along the total oil inlet towards the total oil outlet are the same as the hydraulic flow directions of the valve core in the first valve core channel; the second valve core channel and the third valve core channel along the total oil inlet towards the total oil outlet are not provided with one-way valve channels, so that the hydraulic pressure cannot be directly obtained from the lower layer total oil way, and therefore the hydraulic pressure needs to be obtained from the third oil groove or the seventh oil groove of the first second valve core channel, specifically as follows:
as shown in fig. 15, taking the second valve core channel as an example, when the valve core 2 moves towards the first reversing oil port 8, the first slide valve 13 and the fourth slide valve 16 seal two ends of the first oil groove 18, the upper layer total oil path is closed, the fourth oil groove 21 is communicated with the fifth oil groove 22, the seventh oil groove 25 is communicated with the eighth oil groove 26, the upper layer total oil path is closed, the seventh oil groove 24 of the first second valve core channel supplies oil to the eighth oil groove 25 of the second valve core channel through the seventh oil groove 24 of the second valve core channel, and the oil flows to the backflow oil path 10 after passing through the fourth oil groove 21 and the fifth oil groove 22 of the second valve core channel during oil return.
As shown in fig. 16, taking the second valve core channel as an example, when the valve core moves towards the second reversing oil port 9, the first slide valve 13 and the second slide valve 14 block both ends of the first oil groove 18, the upper layer total oil path is closed, the third oil groove 20 is communicated with the fourth oil groove 21, the eighth oil groove 26 is communicated with the ninth oil groove 27, the upper layer total oil path is closed, the third oil groove 20 of the first second valve core channel supplies oil to the fourth oil groove 21 through the third oil groove 20 of the second valve core channel, and the return oil path 10 flows after passing through the eighth oil groove 25 and the ninth oil groove 26 of the second valve core channel during oil return.
When the valve core of the third second valve core channel moves, the third oil groove or the seventh oil groove of the first second valve core channel is sent to the third oil groove or the seventh oil groove of the third valve core channel through the third oil groove or the seventh oil groove of the second valve core channel, which are not described in detail herein.
Preferably, a safety valve runner 32 communicated with the total oil way is further arranged in the valve body 1, and a safety valve 33 for preventing the oil pressure in the valve body from exceeding a set threshold value is arranged in the safety valve runner 32; an unloading flow passage 34 for the overflow of hydraulic oil in the first valve core passage 6 or the second valve core passage 7 and the backflow after the overflow and the internal leakage are also arranged in the valve body, and the unloading flow passage 34 is communicated with the safety valve flow passage 32 and the total oil way.
Example 2
On the basis of embodiment 1, in order to facilitate operation, two adjacent valve core channels share one operating lever, the operating lever swings up and down to adjust the position of one valve core in the valve core channel, and the operating lever swings left and right to adjust the position of the other valve core in the valve core channel. 8 valve cores are sequentially arranged from the total oil inlet 4 to the total oil outlet 5, the left valve core 2 shares one control rod 3, the right valve core 2 shares one control rod 3, and the middle four valve cores 2 are respectively provided with one control rod 3.
Specifically, as shown in fig. 17, the two valve cores 2 are respectively connected to a triangle-like linkage plate 36 through a group of end rod knuckle bearings 35, the end rod knuckle bearings of the two valve cores 2 are respectively connected to two corners of the linkage plate 36, and a group of end rod knuckle bearings 35 are further installed at the remaining corners of the linkage plate 36 to serve as supports for the action of the linkage plate 36; a threaded hole is formed in the center of the linkage plate 36, and the end of the operating rod 3 is connected to the threaded hole in the center of the linkage plate 36 in a threaded manner; the rotating directions of the end rod joint bearings 35 connected with the two valve cores 2 are mutually perpendicular.
Example 3
The utility model also provides an excavator, wherein the multi-way valve in the embodiment 2 is used for the excavator, the hydraulic system of the excavator is provided with the multi-way valve for controlling the excavator, as shown in figure 1, 8 paths of valve cores are sequentially arranged along the total oil inlet 4 towards the total oil outlet 5, and the first path of valve cores are singly used for controlling the breaking hammer to operate by using a control rod from the position close to the total oil inlet 4; the second valve core and the third valve core share an operating lever for controlling the large arm of the excavator to operate; the fourth valve core and the fifth valve core control wheels on two sides of the excavator to run through an operating lever respectively, and the excavator moves forwards or backwards when the fourth valve core and the fifth valve core move in the same direction; a control rod is used for controlling the pushing shovel to operate by a sixth valve core; the seventh valve core and the eighth valve core share one control rod for controlling the operation of the small arm of the excavator.
The present embodiment is further illustrative of the present utility model and is not to be construed as limiting the utility model, and those skilled in the art can make no inventive modifications to the present embodiment as required after reading the present specification, but only as long as they are within the scope of the claims of the present utility model.
Claims (10)
1. An integral multi-way valve is characterized by comprising a valve body, a plurality of valve cores and a control handle;
the valve body is an integrated valve body, a total oil inlet and a total oil outlet are respectively arranged at two ends of the valve body, a total oil path is formed between the total oil inlet and the total oil outlet, the total oil path comprises an upper layer total oil path and a lower layer total oil path, and the upper layer total oil path and the lower layer total oil path are arranged in parallel;
a plurality of first valve core channels and a plurality of second valve core channels are sequentially arranged in the valve body along an upper layer total oil way from a total oil inlet to a total oil outlet;
the control handle is used for adjusting the position of the valve core in the first valve core channel or the second valve core channel, the first valve core channel and the second valve core channel both comprise a first reversing oil port and a second reversing oil port, and a hydraulic control flow channel is formed between the first reversing oil port and the second reversing oil port outside the valve body; the valve body is provided with an oil return way corresponding to the first reversing oil port and the second reversing oil port respectively, and the oil return way is communicated with the total oil return port;
a one-way valve channel is arranged below each first valve core channel and below a first valve core channel and a second valve core channel adjacent to the first valve core channel respectively, one-way valves are arranged on two sides of a lower layer total oil way in the one-way valve channel respectively corresponding to the first reversing oil port and the second reversing oil port, and the lower layer total oil way is sequentially communicated with the one-way valve channels;
the valve core comprises three state positions in the valve body:
when the valve core is positioned in the middle position, a hydraulic control flow passage between the first reversing oil port and the second reversing oil port is disconnected from a total oil way;
when the valve core moves towards the first reversing oil port, the upper layer total oil way is closed, the hydraulic control flow passage is communicated with the lower layer total oil way and forms a hydraulic flow direction of the second reversing oil port towards the first reversing oil port, and the first reversing oil port is communicated with the corresponding oil return oil way;
when the valve core moves towards the second reversing oil port, the upper layer total oil way is closed, the hydraulic control flow passage is communicated with the lower layer total oil way and forms a hydraulic flow direction of the first reversing oil port towards the second reversing oil port, and the second reversing oil port is communicated with the corresponding oil return oil way.
2. The unitary multi-way valve of claim 1, wherein the first and second spool passageways each comprise a first oil groove disposed in a central portion of the spool passageway, the second, third, fourth and fifth oil grooves being disposed sequentially along the first oil groove toward one end of the spool passageway, and the sixth, seventh, eighth and ninth oil grooves being disposed sequentially along the first oil groove toward the other end of the spool passageway; the calibers of the first oil groove, the second oil groove, the third oil groove, the fourth oil groove, the fifth oil groove, the sixth oil groove, the seventh oil groove, the eighth oil groove and the ninth oil groove are larger than the caliber of the valve core channel;
y-shaped oil channels are respectively connected between the total oil inlet and the first valve core channel, between the adjacent first valve core channels and the second valve core channels and between the adjacent second valve core channels.
3. The unitary multi-way valve of claim 2 wherein said valve cartridge comprises a valve stem, a first spool valve disposed along a central portion of the valve stem, a second spool valve and a third spool valve disposed along the first spool valve in sequence toward one end of the valve stem, and a fourth spool valve and a fifth spool valve disposed along the first spool valve in sequence toward the other end of the valve stem; the first slide valve is a sheet slide valve, and the second slide valve, the third slide valve, the fourth slide valve and the fifth slide valve are cylindrical slide valves.
4. A unitary multi-way valve as set forth in claim 3 wherein said Y-shaped oil gallery includes a first oil inlet end, a first oil outlet end and a second oil outlet end;
the main oil inlet is connected with a first oil inlet end, the first oil outlet end is connected with a second oil groove, and the second oil outlet end is connected with a sixth oil groove;
between adjacent first valve core channels, a first oil groove of a previous first valve core channel is connected with a first oil inlet end, a first oil outlet end is connected with a second oil groove of a next first valve core channel, and a second oil outlet end is connected with a sixth oil groove of the next first valve core channel;
between the adjacent first valve core channel and second valve core channel, the first oil groove of the first valve core channel is connected with the first oil inlet end, the first oil outlet end is connected with the second oil groove of the second valve core channel, and the second oil outlet end is connected with the sixth oil groove of the second valve core channel;
between adjacent second valve core channels, the first oil groove of the former second valve core channel is connected with the first oil inlet end, the first oil outlet end is connected with the second oil groove of the next second valve core channel, and the second oil outlet end is connected with the sixth oil groove of the next second valve core channel.
5. The unitary multi-way valve of claim 4, wherein the third and seventh oil grooves of the first spool passage are each connected to a check valve passage; the third oil groove and the seventh oil groove of the first second valve core channel adjacent to the first valve core channel are respectively connected with the one-way valve channel; the check valve channel is internally provided with check valves corresponding to the third oil groove and the seventh oil groove respectively; and a third oil groove between the adjacent second valve core channels is communicated, and a seventh oil groove between the adjacent second valve core channels is communicated.
6. The integrated multi-way valve according to claim 5, wherein the check valve is closed when the valve core is located at the middle position, and the hydraulic pressure in the lower-layer total oil path is increased and the check valve is opened when the valve core moves towards the first reversing oil port or the second reversing oil port.
7. A unitary multi-way valve as set forth in claim 5 wherein,
when the valve core is positioned in the middle position, the first slide valve is arranged in the middle of the first oil groove, the second slide valve and the third slide valve block the two ends of the fourth oil groove, and the fourth slide valve and the fifth slide valve block the two ends of the eighth oil groove;
when the valve core moves towards the direction of the first reversing oil port, the first slide valve and the fourth slide valve plug two ends of the first oil groove, the upper layer total oil way is closed, the fourth oil groove is communicated with the fifth oil groove, and the seventh oil groove is communicated with the eighth oil groove;
when the valve core moves towards the direction of the second reversing oil port, the first slide valve and the second slide valve plug two ends of the first oil groove, the upper layer total oil way is closed, the third oil groove is communicated with the fourth oil groove, and the eighth oil groove is communicated with the ninth oil groove.
8. The integral multi-way valve according to claim 1, wherein a safety valve runner communicated with the total oil way is further arranged in the valve body, and a safety valve for preventing the oil pressure in the valve body from exceeding a set threshold value is arranged in the safety valve runner; and an unloading flow passage used for overflowing hydraulic oil in the first valve core passage or the second valve core passage and flowing back after the hydraulic oil is leaked inwards is also arranged in the valve body, and the unloading flow passage is communicated with the safety valve flow passage and the total oil passage.
9. The unitary multi-way valve of claim 1 wherein said first spool passage is 5 and said second spool passage is 3.
10. An excavator on which a multi-way valve for controlling the hydraulic system of the excavator is mounted, the multi-way valve being as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322570191.2U CN220792166U (en) | 2023-09-21 | 2023-09-21 | Integral multi-way valve and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322570191.2U CN220792166U (en) | 2023-09-21 | 2023-09-21 | Integral multi-way valve and excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220792166U true CN220792166U (en) | 2024-04-16 |
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ID=90636086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322570191.2U Active CN220792166U (en) | 2023-09-21 | 2023-09-21 | Integral multi-way valve and excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220792166U (en) |
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2023
- 2023-09-21 CN CN202322570191.2U patent/CN220792166U/en active Active
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