CN2298394Y - Servo foot valve suitable for band saw bed - Google Patents
Servo foot valve suitable for band saw bed Download PDFInfo
- Publication number
- CN2298394Y CN2298394Y CN 97237949 CN97237949U CN2298394Y CN 2298394 Y CN2298394 Y CN 2298394Y CN 97237949 CN97237949 CN 97237949 CN 97237949 U CN97237949 U CN 97237949U CN 2298394 Y CN2298394 Y CN 2298394Y
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- valve body
- utility
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- valve
- briquetting
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- Expired - Fee Related
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Abstract
The utility model relates to a servo foot valve suitable for a band saw bed. A valve body is provided with a hydraulic oil inlet and a hydraulic oil outlet. The hydraulic oil inlet and the hydraulic oil outlet control the switching of the valve body through the position variation of an annular groove at one end of a valve core. One end of the valve core is provided with a secondary spring. One end of the secondary spring is contacted with the valve body. The other end of the valve core is contacted with a pressing block through a ball. The other end of the pressing block is sheathed with a main spring. The other end of the main spring is clamped with the pressing block which is connected with a pressure adjusting nut. The utility model has simple structure. The utility model can effectively control the working conditions of a saw belt to protect the saw belt. The utility model can also automatically control the feeding speed of the saw belt according to the magnitude of the sawing resistance. The cutting rate can be enhanced effectively; the service life of the utility model can be extended. The utility model is suitable for matching with various horizontal band saw beds.
Description
The utility model relates to a kind of hydrovalve, and refering in particular to is a kind of servo-actuated back pressure valve.
Horizontal band sawing machine is a kind of energy-saving metal cutting machine tool, generally is to be produced by saw frame deadweight to make power that saw frame wraparound rotating shaft moves downward to realize the feed movement of saw band.The speed of its feed movement is generally by the check valve that is connected on the saw frame lifting oil cylinder cavity of resorption oil return circuit, back pressure valve, throttle valve control, when or the strength of materials big by cut spare diameter is higher, the feeding drag that saw blade bears is quite big, maximum can reach the feed force of all being conducted oneself with dignity and being produced by saw frame, at this moment, saw frame is zero to the active force of oil cylinder piston, that is the pressure of oil cylinder cavity of resorption is zero, this pressure is called " back pressure ", when " back pressure " is zero, back pressure valve is ineffective, and the feeding drag that saw band is born and the saw frame feed force that produces of all conducting oneself with dignity equates, and saw frame is conducted oneself with dignity big more, the feeding drag is also big more, cause saw blade to reduce working life, broken belt occurs, vexed car, beat phenomenons such as tooth, influence the proper functioning of band sawing machine.
The purpose of this utility model is to overcome the deficiency of prior art and provides a kind of simple in structure, and manufacturing is easy, can regulate oil cylinder back pressure value automatically, guarantees that saw band is in the servo-actuated back pressure valve that band sawing machine uses that is suitable for of working under the metastable sawing drag.
Main purpose of the present utility model is achieved in that and is provided with the hydraulic oil import and export that two annular groove change in location by spool one end are controlled its break-make on valve body, one end of spool is equipped with the secondary spring that an end contacts with valve body, the other end of spool contacts with a briquetting by a ball, the other end of briquetting is set with a main spring, and the other end of main spring is installed with a briquetting that links to each other with the pressure regulation nut.
Further improvement of the utility model is also to be provided with one to control the make-up oil inlet of itself and filler opening break-make by another annular groove of spool on valve body.
Concrete structure of the present utility model describes in detail below in conjunction with accompanying drawing:
Accompanying drawing 1 is the utility model master sectional view.
Accompanying drawing 2 is another embodiment's of the utility model a main sectional view.
See accompanying drawing 1, the utility model is by valve body 1, valve core 3, main bullet Huang 4, pressure regulation nut 5, auxilliary spring 6, briquetting 10,11, ball 12 is formed, described spool 3 is installed in the valve pocket 13 in the valve body 1, one end is equipped with an auxilliary spring 6 that contacts with valve body 1 end cap 14, the other end contacts with briquetting 10 by ball 12, the other end of briquetting 10 is set with main spring 4, the other end of main spring 4 is installed with briquetting 11, look nut 5 spinnings contact on valve body 1 end cap 15 and with briquetting 11, also be provided with filler opening 2 and communicate with damp tube 7 in the valve body 1 on valve body 1, oil outlet 8 is located on the valve body 1 and is controlled the break-make of itself and filler opening 2 by being located at annular groove 16 change in location on the spool 3.
See accompanying drawing 2, further improvement of the utility model is a repairing mouth 17 to be set and by being located at the break-make of annular groove 18 control itself and filler opening 2 on the spool 3 on the valve body.
Working principle of the present utility model is sketched in following:
1, do not adopt the scheme of repairing mouth, when saw frame wraparound rotating shaft descends drive saw band feeding work, saw frame interlock oil cylinder piston produces back pressure to the hydraulic oil of oil cylinder cavity of resorption, the hydraulic oil pressurized is through filler opening 2, damping hole 7 enters to be in the valve body 1 to reach between spool 3 annular grooves 16 and the valve pocket 13 and enters between spool 3 ends and the valve body end cap 14 through through hole 20 on the spool 3, when back pressure value during greater than the pressure of 4 pairs of spools 3 of main spring, move on the spool 3, its annular groove 16 will and oil outlet 8 between form an opening 9 (dotted line part among the figure), the pressure oil in the oil cylinder cavity of resorption will flow out from oil outlet 8; When the cutting area increases; when the cutting drag increased, oil cylinder cavity of resorption back pressure value reduced, and main spring 4 is pressed to spool 3 and moved down; reduce very to cause sealing opening 9; oil cylinder cavity of resorption back pressure value is increased, reduce the feed speed of saw blade, so repeatedly; saw blade is under the metastable feeding drag works; reach the protection saw blade, prolong machine working life, improve the purpose of complete machine cutting-rate.
When 2, adopting repairing mouth scheme, working principle is the same, only is when back pressure reduces, spool moves down closes oil outlet 8, thereby its annular groove 18 forms an opening 19 and connects repairing mouth 17 and filler opening 2, and hydraulic oil replenishes oil sources to the oil cylinder cavity of resorption under external oil pump effect, its back pressure is increased, and after back pressure increases, make again on the spool 3 and move, sealing repairing mouth 17 and filler opening 2 are opened oil outlet 8, and so forth, the back pressure value is in the transient equiliblium.
In sum; the utility model is simple and reasonable; manufacturing is easy; can effectively control the operating conditions of saw band; the protection saw band, and can effectively improve cutting-rate according to the automatic feed speed of controlling saw band of the size of sawing drag; prolong the working life of machine, be suitable for and the supporting use of various horizontal band sawing machines.
Claims (2)
1, be suitable for the servo-actuated back pressure valve that band sawing machine uses, comprise valve body 1, valve core 3, main bullet Huang 4, pressure regulation nut 5, auxilliary spring 6, briquetting 10,11, ball 12, it is characterized in that spool 3 is installed in the valve pocket 13 in the valve body 1, one end is equipped with an auxilliary spring 6 that contacts with valve body 1 end cap 14, the other end contacts with briquetting 10 by ball 12, the other end of briquetting 10 is set with main spring 4, the other end of main spring 4 is installed with briquetting 11, look nut 5 spinnings contact on valve body 1 end cap 15 and with briquetting 11, also be provided with filler opening 2 and communicate with damp tube 7 in the valve body 1 on valve body 1, oil outlet 8 is located on the valve body 1 and is controlled the break-make of itself and filler opening 2 by being located at annular groove 16 change in location on the spool 3.
2, according to claim 1ly be suitable for the servo-actuated back pressure valve that band sawing machine uses, it is characterized in that valve body is provided with a repairing mouth 17 and by being located at the break-make of annular groove 18 controls itself and filler opening 2 on the spool 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237949 CN2298394Y (en) | 1997-04-14 | 1997-04-14 | Servo foot valve suitable for band saw bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97237949 CN2298394Y (en) | 1997-04-14 | 1997-04-14 | Servo foot valve suitable for band saw bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2298394Y true CN2298394Y (en) | 1998-11-25 |
Family
ID=33948470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97237949 Expired - Fee Related CN2298394Y (en) | 1997-04-14 | 1997-04-14 | Servo foot valve suitable for band saw bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2298394Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687311A (en) * | 2009-12-28 | 2012-09-19 | 长野自动机械株式会社 | Apparatus for supplying electrolytic solution |
-
1997
- 1997-04-14 CN CN 97237949 patent/CN2298394Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102687311A (en) * | 2009-12-28 | 2012-09-19 | 长野自动机械株式会社 | Apparatus for supplying electrolytic solution |
| CN102687311B (en) * | 2009-12-28 | 2014-12-17 | 长野自动机械株式会社 | Method and apparatus for supplying electrolytic solution |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |