CZ307318B6 - A differential valve - Google Patents
A differential valveInfo
- Publication number
- CZ307318B6 CZ307318B6 CZ2017-291A CZ2017291A CZ307318B6 CZ 307318 B6 CZ307318 B6 CZ 307318B6 CZ 2017291 A CZ2017291 A CZ 2017291A CZ 307318 B6 CZ307318 B6 CZ 307318B6
- Authority
- CZ
- Czechia
- Prior art keywords
- closure
- connection
- cylindrical chamber
- seating
- piston
- Prior art date
Links
Landscapes
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Actuator (AREA)
- Fluid-Pressure Circuits (AREA)
- Safety Valves (AREA)
Abstract
A differential valve is created especially for the function of a hydraulic differential between the hydraulic jack circuits and the hydraulic corner cylinder of the ceiling joist of the mechanized reinforcement section of deep mines, with a liquid pressure of up to 50 MPa, typically at a nominal pressure of 32 MPa. It consists of a body (1) with a cylindrical chamber (20) in which the outer tube (5) is freely placed and the inner tube (7) is placed freely in the outer tube (5). The cylindrical chamber (20) and the two tubes (5, 7) are closed from one side by a connection (2) with a through hole (3) leading into the gap between these tubes (5, 7), and, from the other side, by a closure (4) spaced from the bottom of the cylindrical chamber (20). The outer tube (5) is sealed in the middle of its length in the cylindrical chamber (20), whereby the space of the cylindrical chamber (20) is divided into three parts, each of which has a channel (A, B, R) for feeding the control pressure of the liquid. The connection (2) and the closure (4) are provided with a seating (15), (16) and radial holes (6) flowable towards the seating (15), (16). In the area of the inner tube (7), there is the main spring (8), which is, at one end, leaning against a piston (11) leading in the connection (2), and, at the other end, leaning against a piston (12) leading in the closure (4). The piston (12) in the connection (2) carries a spring-loaded pin (9) which closes the seating (15) in the connection (2), and the piston (12) in the closure (4) carries a spring-loaded pin (10) which closes the seating (16) in the closure (4).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ2017-291A CZ307318B6 (en) | 2017-05-24 | 2017-05-24 | A differential valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CZ2017-291A CZ307318B6 (en) | 2017-05-24 | 2017-05-24 | A differential valve |
Publications (2)
Publication Number | Publication Date |
---|---|
CZ2017291A3 CZ2017291A3 (en) | 2018-05-30 |
CZ307318B6 true CZ307318B6 (en) | 2018-05-30 |
Family
ID=62188891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CZ2017-291A CZ307318B6 (en) | 2017-05-24 | 2017-05-24 | A differential valve |
Country Status (1)
Country | Link |
---|---|
CZ (1) | CZ307318B6 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2526609Y (en) * | 2001-07-04 | 2002-12-18 | 丛志华 | Two-way valve for removing fish scale with high-pressure water |
CZ304474B6 (en) * | 2009-01-29 | 2014-05-21 | Hennlich Industrietechnik, Spol. S R. O. | Safety and surge valve for protection of hydraulic units |
EP3002464A1 (en) * | 2014-10-01 | 2016-04-06 | Nabtesco Corporation | Hydraulic valve |
CZ306635B6 (en) * | 2012-07-24 | 2017-04-12 | Hennlich Idustrietechnik, Spol. S R. O. | A safety valve for protecting hydraulic units |
-
2017
- 2017-05-24 CZ CZ2017-291A patent/CZ307318B6/en not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2526609Y (en) * | 2001-07-04 | 2002-12-18 | 丛志华 | Two-way valve for removing fish scale with high-pressure water |
CZ304474B6 (en) * | 2009-01-29 | 2014-05-21 | Hennlich Industrietechnik, Spol. S R. O. | Safety and surge valve for protection of hydraulic units |
CZ306635B6 (en) * | 2012-07-24 | 2017-04-12 | Hennlich Idustrietechnik, Spol. S R. O. | A safety valve for protecting hydraulic units |
EP3002464A1 (en) * | 2014-10-01 | 2016-04-06 | Nabtesco Corporation | Hydraulic valve |
Also Published As
Publication number | Publication date |
---|---|
CZ2017291A3 (en) | 2018-05-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Patent lapsed due to non-payment of fee |
Effective date: 20220524 |