Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K15/00—Check valves
  • F16K15/02—Check valves with guided rigid valve members
  • F16K15/06—Check valves with guided rigid valve members with guided stems
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
  • F16K17/12—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side weight-loaded
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
  • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
  • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
  • F16K17/19—Equalising valves predominantly for tanks
  • F16K17/194—Equalising valves predominantly for tanks weight-loaded

Definitions

• the invention relates to the construction, and specifically to a normally closed non-return valve for installation on vertical pipes of water supply and heating systems, which are designed to eliminate (“blow") the vacuum generated during the emptying of closed risers, when lowering the column of water in the riser causes a decrease in pressure over this column below atmospheric, leading to "freezing" of the part of the drained water and the inability to completely empty the riser.
• Known normally closed non-return valve comprising a housing with a cylindrical cavity and a protruding nozzle located outside on one side of the housing along the axis of the cavity for connecting the valve to the pipe, the cavity of which communicates with the cylindrical cavity of the housing, a cover that closes the cylindrical cavity of the housing from the side opposite to the location of the pipe has its own pipe for connecting the valve to the pipe, the cavity of which also communicates with the cylindrical cavity of the housing, a locking element having the ability to move freely along the axis of the housing and the cover and spring-loaded in the direction of the cover, which has a seating seat in the area of the valve opening to which the said locking element is mated via a sealing element.
• the locking element has, on the one hand, for seating in the saddle, a conical surface with an annular groove in which said sealing element in the form of a ring is installed.
• a centering element is located that extends into the end of the spring, which rests against the round sample in the bottom of the cylindrical cavity of the housing around the opening of the housing pipe (JP 2006-71075 A, IPC F16K 17/196, 2006).
• the shut-off element moves away from the seat and allows the fluid to enter the cylindrical cavity of the housing, thereby relieving pressure depression.
• This known non-return valve has an upwardly open nozzle for fluid inlet, the cavity of which is clogged during continuous operation of the valve and, if activated, dirt can enter both the body cavity and the pipe, which is undesirable, especially when using a non-return valve of known design for a water supply system .
• the springiness of the spring may decrease over time, especially when using the valve for hot environments, which can lead to a reduction in the set pressure or even to “sag” of the locking element.
• check valve designs are used in which the intake openings are shut off due to the weight of the shut-off elements.
• a normally closed non-return valve comprising a housing with a cylindrical cavity and a protruding nozzle located outside on one side of the housing along the axis of the cylindrical cavity, extending into the cylindrical cavity and having radial holes in the walls of the housing cavity, as well as a cover that the housing is closed, and locking element (US 2006/0174947 A1, IPC F16K 17/194, 2006, Figs. 1 and 2).
• the cover is fixed rigidly, located on the side opposite to the one where the pipe protrudes from the outside of the housing, and is coupled to the end of the pipe inside the cavity of the housing.
• a locking element in the form of a ring, which is placed inside the cylindrical cavity of the housing on the pipe and has the ability to move freely along the axis of the housing (pipe).
• valve zone arranged generally similarly with a locking element in the form of a ring lying on the inner partition with holes in the cylindrical cavity of the housing.
• This zone which is not directly related to the essence of this utility model, is designed to relieve excess pressure when its shut-off element rises, passes the fluid from the cylindrical cavity of the housing to its upper part above the internal partition, where it exits through holes in the walls corps.
• the technical result of the invention is to expand the arsenal of normally closed check valves, used mainly for installation on vertical pipes of water supply and heating systems (risers) to eliminate (“blow") the vacuum generated during their emptying, eliminating the ingress of dirt and reliably protecting against the release of fluid pressure, which also allows disassembly using simple plumbing tools for the implementation of preventive maintenance.
• W normally closed check valves
• a locking element in the form of a disk located in a cylindrical cavity of the housing with the possibility of free movement along its axis.
• the locking element at the end side of the lid is made with an axial rod and three air holes around the axis, separated by radial jumpers.
• the lid on the inside is made with a protrusion with a blind central hole in which the rod of the locking element is located for its reciprocating movement along the axis of the cylindrical cavity of the housing.
• the housing is made with a portion of the internal thread in the cylindrical cavity along which the lid is fixed by the portion of the external thread, the housing and the cover being sealed together by an annular sealing element.
• the housing in the particular case of implementation can be made with three holes in the form of arcs around the axis of the cylindrical cavity of the housing, separated by radial jumpers.
• the protruding pipe in the particular case of implementation can be performed with an external threaded section for connecting the valve to the pipe of the water supply or heating system. But it is possible to make a pipe with an internal threaded section.
• the cover in the particular case of implementation can be externally made with a central protrusion having the shape of a hexagonal prism for a wrench, which further facilitates the assembly and disassembly of the non-return valve.
• the annular groove in the locking element in which the annular sealing element is fixed in the particular case of implementation, can be made in the cross-section in the form of a "dovetail", which ensures reliable fastening of the annular sealing element and additionally affects the increase in the reliability of the structure.
• the annular sealing element can protrude above the end face on which it is fixed, which will further increase the reliability of the non-return valve and increase the protection against the release of pressure of the fluid in the pipeline.
• the annular sealing element may be made of ethylene-propylene rubber, or fluororubber, or nitrile butadiene rubber, or silicone rubber. Use of other acceptable materials is possible.
• the implementation of the invention is made of ethylene-propylene rubber, or fluororubber, or nitrile butadiene rubber, or silicone rubber. Use of other acceptable materials is possible.
• FIG. 1 shows a longitudinal section of a normally closed check valve assembly
• FIG. 1 is a plan view on the bottom of the cylindrical cavity
• - figure 4 is a cover, top view.
• a normally closed non-return valve for installation on vertical pipes of water supply and heating systems includes a housing 1, a cover 2 and a shut-off element 3.
• the housing 1 is made with a cylindrical cavity 4 and a protruding pipe 5 located outside on one side along the axis of the cylindrical cavity 4, the cavity 6 of which communicates with the cylindrical cavity 4 of the housing 1 and which is made with a threaded section 7 for connecting the housing 1 to the pipe (not shown shown) water supply or heating systems.
• the cover 2 closes the cylindrical cavity 4 of the housing 1 from the side opposite to the location of the nozzle 5.
• the locking element 3 has a disk shape and is located in the cylindrical cavity 4 of the housing 1 with the possibility of free movement along its axis.
• Air holes 9 are parallel to the axis of the cylindrical cavity 4 and are made in the wall 8 of the housing 1 from the nozzle 5 side.
• the locking element 3 at the end 10 from the side to the nozzle 5 is made with an annular groove 1 1 in which an annular sealing element 12 is fixed having an area that covers the air holes 9 in the mating position under the action of its own weight with the wall 8 of the housing 1 from the side of the pipe 5, and also, at least one passage hole 13 located in the Central zone of the locking element 3 opposite the hole 14 of the pipe 4.
• the locking element 3 at the end 15 from the side of the cover 2 is made with an axial rod 16 and three air holes 13 around the axis, separated by radial jumpers 17 (Fig.Z).
• the cover 2 on the inside is made with a protrusion 18 with a blind central hole 19, in which the rod 16 of the locking element 3 is located for its reciprocating movement along the axis of the cylindrical cavity 4 of the housing 1.
• the housing 1 is made with a portion of the internal thread 20 in the cylindrical cavity 4, on which the cover 2 is fixed with a portion of the external thread, the housing 1 and the cover 2 are sealed together by an annular sealing element 21.
• the housing 1 is made with three holes 9 in the form of arcs around the axis of the cylindrical cavity 4, separated by radial bridges 22 (figure 2).
• the threaded section 7 of the pipe 5 is made external, and the cover 2 outside (top) is made with a central protrusion 23 (figure 4), having the shape of a hexagonal prism for a wrench.
• the annular groove 1 1 in the locking element 3, in which the annular sealing element 12 is fixed, is made in cross section in the form of a dovetail.
• the annular sealing element 12 protrudes above the end of the locking element 3, on which it is fixed and can be made of ethylene-propylene rubber, fluororubber, nitrile butadiene rubber or silicone rubber.
• Other check valve parts can be made of brass, bronze or stainless steel. All check valve parts are manufactured using well-known technologies for manufacturing parts from used materials.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Check Valves (AREA)
• Valve Housings (AREA)
• Details Of Valves (AREA)
• Multiple-Way Valves (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=48698096

Family Applications (1)

Country Status (4)

Cited By (1)

Citations (5)

Family Cites Families (4)

• 2011
  • 2011-12-28 RU RU2011153760/06A patent/RU2511774C2/ru active
• 2012
  • 2012-10-23 UA UAU201310991U patent/UA88924U/uk unknown
  • 2012-10-23 CN CN201290000698.1U patent/CN203880157U/zh not_active Expired - Lifetime
  • 2012-10-23 WO PCT/RU2012/000856 patent/WO2013100805A1/fr not_active Ceased

Patent Citations (5)

Non-Patent Citations (1)

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