CZ307318B6 - A differential valve - Google Patents

A differential valve

Info

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
Application number
CZ2017-291A
Other languages
Czech (cs)
Other versions
CZ2017291A3 (en
Inventor
Jindřich Schaumann
Original Assignee
Hennlich S.R.O.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hennlich S.R.O. filed Critical Hennlich S.R.O.
Priority to CZ2017-291A priority Critical patent/CZ307318B6/en
Publication of CZ2017291A3 publication Critical patent/CZ2017291A3/en
Publication of CZ307318B6 publication Critical patent/CZ307318B6/en

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).
CZ2017-291A 2017-05-24 2017-05-24 A differential valve CZ307318B6 (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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