CN200971882Y - Differential valve - Google Patents
Differential valve Download PDFInfo
- Publication number
- CN200971882Y CN200971882Y CN 200620011601 CN200620011601U CN200971882Y CN 200971882 Y CN200971882 Y CN 200971882Y CN 200620011601 CN200620011601 CN 200620011601 CN 200620011601 U CN200620011601 U CN 200620011601U CN 200971882 Y CN200971882 Y CN 200971882Y
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- Prior art keywords
- valve body
- port
- fluid
- communicated
- control mouth
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- Expired - Lifetime
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- Multiple-Way Valves (AREA)
Abstract
The utility model discloses a differential valve, which has the mainly technological points that sliding valve core is provided with an independent first flow route and a second flow route. When the sliding valve core is in a first working position, first liquid control port of valve body is communicated with a first liquid passing port through the first flow route of the sliding valve core, and a second liquid control port of the valve body is communicated with a second liquid passing port through the second flow route of the sliding valve core. When the sliding valve core is in a second working position, the second liquid control port of the valve body is directly communicated with the second liquid passing port, and the second liquid control port of the valve body is communicated with the first liquid passing port through the second flow route of the sliding valve core. Traveling speed of piston in hydraulic cylinder is promoted with more than two times without changing flux of the hydraulic pump. If arranged on horizontal broacher, the differential valve can largely shorten recovering time of telescopic broaching cutter and improve working efficiency of the broacher.
Description
Technical field
The utility model relates to the valve technology field, relates in particular to a kind ofly when the rod chamber of oil hydraulic cylinder or rodless cavity feed high pressure oil respectively, makes hydraulic cylinder piston have the valve of different motion speed.
Background technique
For horizontal broaching machine, broaching tool is fixed together by the piston rod of a chuck and oil hydraulic cylinder, and under the control of hydraulic system, piston rod when retraction realized the broaching operation, and piston rod is realized the broaching tool return when stretching out.Since broaching tool and piston rod tension during retraction, good rigidity, not yielding, thereby can guarantee the precision of workpiece, and broaching tool is an idle stroke when stretching out, and is not subjected to cutting force, thereby avoided broaching tool and piston rod in the easy unstability of pressured state, and produce deflection deformation, influence the problem of machining accuracy.From the angle of increasing work efficiency, the return time of broaching tool should be short more good more, but in known technology, broaching tool is when return, the rodless cavity of oil hydraulic cylinder is a hyperbaric chamber, rod chamber is a low-pressure cavity, broaching tool is when broaching, and the rod chamber of oil hydraulic cylinder is a hyperbaric chamber, and rodless cavity is a low-pressure cavity, because amass the long-pending water cross section that is greater than rod chamber, the water cross section of rodless cavity, so under same flow rate conditions, the return speed of broaching tool is less than the cutting feed speed of broaching tool, in other words, the broaching time of the return time ratio broaching tool of broaching tool also will be grown, and this situation greatly reduces the working efficiency of broaching machine.
Summary of the invention
Technical problem to be solved in the utility model is: a kind of differential valve is provided, and this differential valve when the rodless cavity to oil hydraulic cylinder feeds high pressure oil, can improve the movement velocity of hydraulic cylinder piston under the situation of the flow that does not change oil hydraulic pump.
For solving the problems of the technologies described above, the technical solution of the utility model is: differential valve, comprise that inside is provided with the valve body of piston chamber, in the described piston chamber sliding spool is installed, described valve body is provided with the first hydraulic control mouth and the second hydraulic control mouth that can be connected with two fluid-through ports of selector valve respectively, with first fluid-through port that can be connected, with second fluid-through port that can be connected with the rodless cavity of oil hydraulic cylinder with the rod chamber of oil hydraulic cylinder; Described sliding spool is provided with the first not connected stream and second stream; Described sliding spool has two working positions in piston chamber, be respectively that the first hydraulic control mouth of valve body, first stream by sliding spool is communicated with, simultaneously the second hydraulic control mouth of valve body is passed through first working position that second stream of sliding spool is communicated with second fluid-through port of valve body and the second hydraulic control mouth of valve body directly is communicated with, simultaneously the second hydraulic control mouth of valve body is passed through second working position that second stream of sliding spool is communicated with first fluid-through port of valve body with second fluid-through port of valve body with first fluid-through port of valve body.
After having adopted technique scheme, the beneficial effects of the utility model are: because described valve body is provided with the first hydraulic control mouth and the second hydraulic control mouth that can be connected with two fluid-through ports of selector valve respectively, with first fluid-through port that can be connected, with second fluid-through port that can be connected with the rodless cavity of oil hydraulic cylinder with the rod chamber of oil hydraulic cylinder; Described sliding spool is provided with the first not connected stream and second stream; Described sliding spool has two working positions in piston chamber, so by selector valve when the first hydraulic control mouth injects high pressure oil, sliding spool slides to first working position under the effect of oil pressure, this moment, the first hydraulic control mouth was communicated with first fluid-through port by first stream of sliding spool, the second hydraulic control mouth is communicated with second fluid-through port by second stream of sliding spool, high pressure oil enters rod chamber from first fluid-through port, and the low pressure oil in the rodless cavity flows to selector valve and then flows back to hydraulic oil container from second fluid-through port.When by selector valve when the second hydraulic control mouth injects high pressure oil, sliding spool slides to second working position under the effect of oil pressure, this moment, the second hydraulic control mouth directly was communicated with second fluid-through port, the second hydraulic control mouth is communicated with first fluid-through port by second stream of sliding spool, high pressure oil enters the rodless cavity of oil hydraulic cylinder from second fluid-through port, enter the rod chamber of oil hydraulic cylinder simultaneously by first fluid-through port, because long-pending water cross section greater than rod chamber, the water cross section of rodless cavity is long-pending, so hydraulic cylinder piston moves to the rod chamber direction, and the hydraulic oil that flows out from rod chamber can not flow back to selector valve, but be sent to rodless cavity together, under the situation of the flow that does not change oil hydraulic pump, the travelling speed of hydraulic cylinder piston is improved more than the twice.If this differential valve is installed on the horizontal broaching machine, will shorten the return time of broaching tool greatly, improve the working efficiency of broaching machine.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the sectional view of the utility model embodiment when sliding spool is in first working position;
Fig. 2 is the sectional view of the utility model embodiment when sliding spool is in second working position;
Fig. 3 is the stereogram of valve body among the utility model embodiment.
Embodiment
A kind of differential valve, shown in Fig. 1 and Fig. 3 were common, the inside of valve body 1 was provided with piston chamber, and sliding spool 5 is installed in the described piston chamber.Described valve body 1 is provided with the first hydraulic control mouth 11 and the second hydraulic control mouth, 12, the first fluid-through ports 13 and second fluid-through port 14.The first hydraulic control mouth gland 3 is fixed in the first hydraulic control mouth 11, it can be connected with a fluid-through port of selector valve, the second hydraulic control mouth gland 4 is fixed in the second hydraulic control mouth 12, it can be connected with another fluid-through port of selector valve, the first fluid-through port gland 2 is fixed in first fluid-through port 13, and can be connected with the rod chamber of oil hydraulic cylinder, second fluid-through port 14 can be connected with the rodless cavity of oil hydraulic cylinder.The first hydraulic control mouth 11 and the second hydraulic control mouth 12 of described valve body have same axis with piston chamber respectively, and such straight-through structure helps reducing the resistance of hydraulic oil flow when the connecting part of hydraulic control mouth and piston chamber.Described sliding spool 5 is provided with the first not connected stream 51 and second stream 52, and first stream 51 and second stream 52 of described sliding spool are respectively the right angle type liquid chunnel, and it can be connected by an axial blind hole and a radial direction through hole and realize.The piston chamber of described valve body is provided with first circular groove 16 and second circular groove 17, first fluid-through port 13 of described valve body is communicated with piston chamber at first circular groove, 16 places, and second fluid-through port 14 of described valve body is communicated with piston chamber at second circular groove, 17 places by intercommunicating pore 15.Such structure, even sliding spool 5 rotates in piston chamber, the also connection effect that can not hinder the one 51 and second stream 52 to be play.
Described sliding spool 5 has two working positions in piston chamber, be respectively as shown in Figure 1 first working position and second working position as shown in Figure 2, sliding spool 5 mobile injected high pressure oils to the first hydraulic control mouth 11 or the second hydraulic control mouth 12 respectively by selector valve and realizes.When sliding spool 5 was in first working position, the first hydraulic control mouth 11 of valve body was communicated with second fluid-through port 14 of valve body by second stream 52 that first stream 51 of sliding spool is communicated with first fluid-through port 13 of valve body, the second hydraulic control mouth 12 of while valve body passes through sliding spool.When sliding spool 5 was in second working position, the second hydraulic control mouth 12 of valve body directly was communicated with second fluid-through port 14 of valve body, the second hydraulic control mouth 14 of while valve body is communicated with first fluid-through port 13 of valve body by second stream 52 of sliding spool.
When selector valve injects high pressure oil to the first hydraulic control mouth 11, sliding spool 5 slides to first working position under the effect of oil pressure, this moment, high pressure oil flowed out the rod chamber that enters oil hydraulic cylinder from first fluid-through port 13, low pressure oil in the rodless cavity of oil hydraulic cylinder flows into from second fluid-through port 14, second stream 52 and the second hydraulic control mouth 12 through sliding spool flow to selector valve, and then flow back to hydraulic oil container.When selector valve injects high pressure oil to the second hydraulic control mouth 12, sliding spool 5 slides to second working position under the effect of oil pressure, this moment, high pressure oil entered the rodless cavity of oil hydraulic cylinder from second fluid-through port 14, and also enter the rod chamber of oil hydraulic cylinder simultaneously by first fluid-through port 13, because amass the long-pending water cross section that is greater than rod chamber, the water cross section of rodless cavity, so hydraulic cylinder piston moves to the rod chamber direction, and the hydraulic oil that flows out from rod chamber can not flow back to selector valve, but be sent to the rodless cavity of oil hydraulic cylinder together, under the situation of the flow that does not change oil hydraulic pump, the travelling speed of hydraulic cylinder piston is improved more than the twice.If this differential valve is installed on the horizontal broaching machine, will shorten the return time of broaching tool greatly, improve the working efficiency of broaching machine.
Claims (3)
1, differential valve, comprise that inside is provided with the valve body of piston chamber (1), sliding spool (5) is installed in the described piston chamber, it is characterized in that: described valve body (1) is provided with the first hydraulic control mouth (11) and the second hydraulic control mouth (12) that can be connected with two fluid-through ports of selector valve respectively, with first fluid-through port (13) that can be connected, with second fluid-through port (14) that can be connected with the rodless cavity of oil hydraulic cylinder with the rod chamber of oil hydraulic cylinder; Described sliding spool (5) is provided with not connected first stream (51) and second stream (52); Described sliding spool (5) has two working positions in piston chamber, be respectively that the first hydraulic control mouth (11) of valve body, first stream (51) by sliding spool is communicated with first fluid-through port (13) of valve body, first working position that the second hydraulic control mouth (12) of valve body, second stream (52) by sliding spool is communicated with second fluid-through port (14) of valve body and the second hydraulic control mouth (12) of valve body directly is communicated with second fluid-through port (14) of valve body simultaneously, second working position that the second hydraulic control mouth (14) of valve body, second stream (52) by sliding spool is communicated with first fluid-through port (13) of valve body simultaneously.
2, differential valve as claimed in claim 1, it is characterized in that: the first hydraulic control mouth (11) and the second hydraulic control mouth (12) of described valve body have same axis with piston chamber respectively, and first stream (51) and second stream (52) of described sliding spool are respectively the right angle type liquid chunnel.
3, differential valve as claimed in claim 2, it is characterized in that: the piston chamber of described valve body is provided with first circular groove (16) and second circular groove (17), first fluid-through port (13) of described valve body is located to be communicated with piston chamber at first circular groove (16), and second fluid-through port (14) of described valve body is located to be communicated with piston chamber at second circular groove (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620011601 CN200971882Y (en) | 2006-11-17 | 2006-11-17 | Differential valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620011601 CN200971882Y (en) | 2006-11-17 | 2006-11-17 | Differential valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200971882Y true CN200971882Y (en) | 2007-11-07 |
Family
ID=38883136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620011601 Expired - Lifetime CN200971882Y (en) | 2006-11-17 | 2006-11-17 | Differential valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200971882Y (en) |
-
2006
- 2006-11-17 CN CN 200620011601 patent/CN200971882Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20091007 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |