IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
|
출원번호 |
US-0354524
(2003-01-30)
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우선권정보 |
DE-0003886 (2002-01-31) |
발명자
/ 주소 |
- Suilmann, Franz-Heinrich
- Mundry, Sebastian M.
- Hantke, Patrick
- Boldt, Torsten
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출원인 / 주소 |
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대리인 / 주소 |
Cook, Alex, McFarron, Manzo, Cummings &
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인용정보 |
피인용 횟수 :
3 인용 특허 :
1 |
초록
▼
The present invention relates to a pilot control valve, especially for use in mining hydraulics. The valve has a valve insert constructed as a valve cartridge, whose single or multipart valve housing has an input entry 17 for pressure fluid P, a connection opening 18 for a load connection A, an outp
The present invention relates to a pilot control valve, especially for use in mining hydraulics. The valve has a valve insert constructed as a valve cartridge, whose single or multipart valve housing has an input entry 17 for pressure fluid P, a connection opening 18 for a load connection A, an output opening 19, opening into the return flow T and an axial boring 21 to accept a valve closing body 20 provided with a closing surface, which can be lifted from a valve sealing seat 31 arranged between the entry opening 17 and the connection opening 18 by means of an electro-magnetic or piezo-electric switching device which can be fastened onto the valve housing. With the lifting movement of the valve closing body 20 from the valve sealing seat 31 is coupled an at least two part closing mechanism for their separation arranged between the connection opening 18 and the output opening 19. In accordance with the present invention a single part valve closing body 20 is provided, having the sealing surface in the form of a collar 28 and the moving part of the closing mechanism in the form of a shaft section 22, whereby the shaft section 22 enters into a boring section 21C of the axial boring 21 during the lifting movement, closing a radial opening 39. The valve sealing seat 31 can be exchanged with a valve sleeve 130 and the nominal bore of the pilot control valve can be changed by means of a throttle 47.
대표청구항
▼
1. A pilot control valve especially for use in mining hydraulics with a valve insert configured as a valve cartridge which can be arranged in a valve accepting boring of a valve block forming a multi-way valve whose valve housing has an inlet for pressure fluid, a connecting opening for a load, an o
1. A pilot control valve especially for use in mining hydraulics with a valve insert configured as a valve cartridge which can be arranged in a valve accepting boring of a valve block forming a multi-way valve whose valve housing has an inlet for pressure fluid, a connecting opening for a load, an outlet opening into a return feed and an axial boring for the acceptance of a valve closing body provided with a sealing surface, which can be lifted by means of a switching device fixed to the valve housing, against the return force of a spring from a valve sealing seat arranged between an inlet opening and the connecting opening, whereby with the lifting movement of the valve closing body from the valve sealing seat an at least two part closing mechanism arranged between the connecting opening and the outlet opening is coupled for their separation wherein a single part valve closing body has a closing surface and a moving part of the closing mechanism, whereby the moving part comprises a shaft section of the valve closing body which plunges with the lifting movement into a boring section of the axial boring, closing a radial opening.2. A pilot control valve according to claim 1, in which the valve closing body has a ring shaped collar whose rear side facing the valve seal seat forms the closing surface or the support surface for a sealing body.3. A pilot control valve according to claim 2, in which the collar is equipped with an additional seating material on its rear side.4. A pilot control valve according to claim 1, in which the shaft section forms one end of the valve closing body, and a pin section forms the other end of the valve closing body, whereby the pin and shaft sections have the same diameter and form guiding surfaces of the valve closing body in the boring sections of the axial boring.5. A pilot control valve according to claim 2, in which the valve closing body has a diameter reducing cut-out with a conical transition section to the shaft section and/or the collar between the collar and the shaft section forming the moving part of the closing mechanism.6. A pilot control valve according to claim 1, in which the valve sealing seat is a component of an exchangeable valve sleeve inserted, especially pressed, into blind boring extensions of the axial boring.7. A pilot control valve according to claim 6, in which the internal diameter of the valve sleeve at the valve sealing seat has essentially the same diameter as the shaft section and a pin section and forms the inner side of the valve sleeve sections of the axial boring.8. A pilot control valve according to Claim 1, in which a valve case comprises a single case part with a stepped blind hole, in which a valve sleeve is inserted, a sleeve end of which inserted into the blind hole forms the valve sealing seat, forms sections of the axial boring with its inside and has the radial opening between two boring sections, whereby preferably the radial opening opens into a circulating groove in the inner side of the valve sleeve.9. A pilot control valve according to claim 8, in which the valve sleeve is made stepped on the inside and the circulating groove is formed by means of an inserted valve sleeve insert in the steps of the valve sleeve.10. A pilot control valve according to claim 1, in which a valve case comprises a first case part and a second case part joined which is provided with a stepped blind hole, in which from the separation plane between the first and second case parts a valve sleeve is inserted, whose free end forms the valve sealing seat and between its other end and a stepped section of the blind hole forms a radial opening by means of gap openings at a sleeve end.11. A pilot control valve according to claim 1, in which a valve case comprises a first case part and a second case part joined which is provided with a stepped blind hole extension, in which from the separation plane between the first and second case parts a valve sleeve is inserted, whose free end forms the valve sealing seat, whereby the extension of the length between a ring shoulder and the base of the sleeve is shorter than the stepped blind hole extension.12. A pilot control valve according to claim 1, in which a valve case comprises a first, a second and a third case part with a first separation plane between the first and the second and a second separation plane between the second and the third case parts, whereby the second case part is provided with a stepped blind hole extension, into which a free sleeve end of the valve sleeve forming the valve sealing seat is inserted.13. A pilot control valve according to claim 12, in which a radial opening is formed from an intermediate gap at the second separation plane.14. A pilot control valve according to claim 1, in which a valve case comprising at least one part and in which at least one of the case parts has at least one decentral through boring for driving out a valve sleeve.15. A pilot control valve according to claim 1, in which at least one flow resistance for the fluid connected in series with the valve sealing seat and the closing mechanism to change the effective nominal bore of the pilot control valve.16. A pilot control valve according to claim 12, in which a flow resistance comprises a throttle or a shutter, whereby a single throttle or a shutter is associated with at least one load connection or a combination of these connections.17. A pilot control valve according to claim 15, in which the throttle or shutter is inserted at a distance from the valve closing body in a boring in a cover forming a load connection, in a valve case.18. A pilot control valve according to claim 1, in which the switching device is an electro-magnetic or piezo-electric actuator, whereby preferably the valve insert is retained in the valve accepting boring in the valve block by means of the switching device.19. A pilot control valve according to claim 1, in which in a multi-part valve case the boring sections of the axial boring form guide and bearing sections for shaft and pin sections are provided in each outer case part with an accepting groove for a sealing ring.
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