CN104235478B

CN104235478B - Momentum safety valve

Info

Publication number: CN104235478B
Application number: CN201410464734.5A
Authority: CN
Inventors: 赵春岳; 郑子林; 陈斌
Original assignee: YONGYI-VALVE GROUP Co Ltd
Current assignee: YONGYI-VALVE GROUP Co Ltd
Priority date: 2014-09-10
Filing date: 2014-09-10
Publication date: 2016-08-24
Anticipated expiration: 2034-09-10
Also published as: CN104235478A

Abstract

The present invention relates to a kind of momentum safety valve, including pilot valve, main valve；Mainly use normally closed structure between import and the control mouth of pilot valve；Main valve seat is the bowl shaped structure of inside and outside two-layer, constitutes discharge chamber between its outer layer and internal layer, and main valve seat lower surface is provided with sealing surface of seat；Main valve clack is the bowl shaped structure of opening upwards, is arranged on the inlet side of main valve seat；Main valve lid is the cylindrical structure of inside and outside two-layer, exhaust space is constituted between its outer layer and internal layer, the discharge chamber of outlet and main valve seat that this exhaust space covers end face with main valve respectively is connected, the internal chamber wall of main valve lid internal layer coordinates with the movable sealing of outside piston face, constitutes and control chamber between the inner chamber of piston upper surface and main valve lid internal layer；Main spring compression is arranged between main valve seat internal layer inner bottom surface and piston lower surface.There is the advantages such as flow resistance is low, discharge coefficient big, fast, the good seal performance of pressure release speed.

Description

Momentum safety valve

Technical field

The present invention relates to a kind of safety valve, especially relate to a kind of momentum safety valve.

Background technology

Existing momentum safety valve is all combined by a pilot valve and a main valve, pilot valve by spring structure or The two kinds of safety valve of lever-type structure forms, and main valve is then to be driven by pilot valve by one and is that angie type is tied The valve composition of structure, valve clack sealing surface is positioned at above sealing surface of seat, relies on spring force to be compressed and valve by flap Seat seals, and its major defect is that volume is big, and valve is after unlatching, and during media discharge, flow resistance is big, Discharge coefficient is little, and pressure release speed is slow, in off position under, flap is produced upwards by valve body import pressure medium Thrust, this thrust reduce flap sealing force, poor sealing performance.

Summary of the invention

It is an object of the invention to the shortcoming existed for prior art, it is provided that a kind of volume is little, flow resistance is low, stream Coefficient of discharge is big, pressure release speed is fast, the momentum safety valve of good seal performance.

The present invention realizes by following technical solution:

This momentum safety valve includes pilot valve, main valve, and pilot valve includes pilot valve body, pilot valve lid, pilot valve lobe, pilot valve Bar and spring pressure setting device, main valve includes main valve body, main valve lid, main valve seat, main valve clack, main valve The intake channel of bar, main spring, pilot valve and main valve connects with pressure vessel, control mouth and the main valve of pilot valve Control chamber connection；Mainly use normally closed structure between import and the control mouth of pilot valve；Main valve seat is inside and outside two The bowl shaped structure of layer, constitutes discharge chamber between its outer layer and internal layer, main valve seat lower surface is provided with sealing surface of seat, This sealing surface of seat is fitted in the intake channel of main valve body by main valve lid；Main valve clack is the bowl-type of opening upwards Structure, is arranged on the inlet side of main valve seat, and upper surface is shaped with the flap cooperated with sealing surface of seat and seals Face, center, upper surface is fixing with main valve stem lower end to be connected；Main valve lid is the cylindrical structure of inside and outside two-layer, its Constituting exhaust space between outer layer and internal layer, this exhaust space covers outlet and the main valve of end face respectively with main valve The discharge chamber of seat is connected, and the internal chamber wall of main valve lid internal layer coordinates with the movable sealing of outside piston face, piston upper end Constituting between the inner chamber of face and main valve lid internal layer and control chamber, piston lower surface is fixing with main valve stem upper end to be connected； Main spring compression is arranged between main valve seat internal layer inner bottom surface and piston lower surface.

In above technical scheme, in the valve pocket controlled between mouth and floss hole of pilot valve, piston-type switch is set, Piston bush that this piston-type switch is fixedly mounted in valve pocket from sealing and the work coordinated with this piston bush movable sealing Plug composition, installs push rod between piston lower surface centre bore and pilot valve lobe back side centre bore, pilot stem lower end is inserted Being contained in the centre bore of piston upper surface, piston bush sidewall is formed respectively with and the through hole controlling mouth and floss hole connects, In the middle part of piston, periphery is shaped with annular groove, and the position of this annular groove is when pilot valve lobe closed mode and piston Two through hole alignment of set sidewall.

In above technical scheme, spring pressure setting device is arranged between pilot stem and pilot valve lid, Pilot stem upper end is fixing with the end of handle to be connected, and end face is covered with being fixedly mounted on pilot valve in the middle part of handle Support hinged.

The invention have the advantage that main valve pressure relief opening in the rectilinear direction of intake channel, flow resistance is low, flow system Number is big, pressure release speed is fast；Main valve clack is positioned at main valve seat inlet side, and pressure medium increases main valve clack and main valve seat Between sealing force, good seal performance.

Accompanying drawing explanation

Fig. 1 is the structural representation of the present invention.

Detailed description of the invention

According to Fig. 1, momentum safety valve of the present invention includes pilot valve, main valve, pilot valve include pilot valve body 10, Pilot valve lid 17, pilot valve lobe 11, pilot stem 14 and spring pressure setting device, main valve include main valve body 1, Main valve lid 7, main valve seat 4, main valve clack 2, main valve stem 3, main spring 6, the intake channel of pilot valve and main valve with Pressure vessel connects, and the mouth 20 that controls of pilot valve connects with the control chamber 9 of main valve；The import of pilot valve and control mouth Normally closed structure, the most under regular operating pressures, pilot valve lobe 11 and pilot valve body 10 intake channel is used between 20 Seal mated condition at interior valve seat, between floss hole 12 and the control mouth 20 of pilot valve, locate connected state；Main Valve seat 4 is the bowl shaped structure of inside and outside two-layer, and its bowlshaped mouth upward, constitutes exhaust between its outer layer and internal layer Chamber 5, this discharge chamber 5 connects with main valve seat 4 intake channel, and main valve seat 4 lower surface is provided with sealing surface of seat, This sealing surface of seat is fitted in the intake channel of main valve body 1 by main valve lid 7；Main valve clack 2 is opening upwards Bowl shaped structure, be arranged on the inlet side of main valve seat 4, its upper surface is shaped with and cooperates with sealing surface of seat Valve clack sealing surface, center, upper surface and main valve stem 3 lower end are fixing to be connected, in off position under, medium pressure Power increases the sealing force between main valve clack 2 and sealing surface of seat, improves sealing property；Main valve lid 7 is inside and outside The cylindrical structure of two-layer, between its outer layer and internal layer constitute exhaust space, this exhaust space respectively with main valve The discharge chamber 5 of the outlet and main valve seat 4 of covering 7 upper surfaces is connected, when main valve clack 2 is opened, and main valve body 1 Intake channel medium passes through the discharge chamber 5 of main valve seat 4 and the exhaust space of main valve lid 7 to main valve lid 7 upper end The outlet drain in face, the internal chamber wall of main valve lid 7 internal layer coordinates with piston 8 periphery movable sealing, on piston 8 Constituting between the inner chamber of end face and main valve lid 7 internal layer and control chamber 9, piston 8 lower surface is solid with main valve stem 3 upper end Fixed connection；Main spring 6 compression is arranged between main valve seat 4 internal layer inner bottom surface and piston 8 lower surface, makes Main spring 6 produces elastic force upwards to main valve clack 2, and this elastic force and pressure medium jointly act on and make main valve clack 2 Seal with sealing surface of seat compression fit.When pressure medium reaches set-pressure value, pilot valve inlet pressure leads to Crossing control mouth 20 and enter main valve control chamber 9, promote piston 8 to be opened by main valve clack 2, main valve inlet of releasing is situated between Matter pressure.

Arranging piston-type switch in the valve pocket controlled between mouth 20 and floss hole 12 of pilot valve, this piston type is opened Close the piston bush 22 being fixedly mounted in valve pocket from sealing and the piston boit coordinated with this piston bush 22 movable sealing 13 compositions, i.e. piston bush 22 periphery fixedly mount with pilot valve body 10 valve pocket inner wall sealing, in piston bush 22 Cavity wall coordinates with piston boit 13 movable sealing, piston boit 13 lower surface centre bore and pilot valve lobe 11 back side centre bore Between install push rod 21, pilot stem 14 lower end is inserted in the centre bore of piston boit 13 upper surface, piston bush 22 Sidewall is formed respectively with and the through hole controlling mouth 20 and floss hole 12 connects, and in the middle part of piston boit 13, periphery is shaped with Annular groove, the position of this annular groove when pilot valve lobe 11 closed mode with two of piston bush 22 sidewall Through hole aligns, by recessed by annular with two through holes that floss hole 12 and control mouth 20 connect on piston bush 22 Groove connection is got up, and when pressure medium reaches set-pressure value, pilot valve inlet pressure promotes pilot valve lobe 11 to open Opening, pilot valve lobe 11 is promoted by push rod 21 and moves on piston boit 13, make annular groove on piston boit 13 from Opening the lead to the hole site on piston bush 22, the through hole on piston bush 22 is closed by piston boit 13 periphery, will row Put mouth 12 and control mouth 20 seals off, and pilot valve import connects, by pilot valve inlet pressure with controlling mouth 20 Introducing main valve control chamber 9 by controlling mouth 20, piston 8 promotes main valve stem 3 that main valve clack 2 is opened pressure of releasing Pressure in force container.

Spring pressure setting device is arranged between pilot stem 14 and pilot valve lid 17, by setting spring 15 He Nut 18 of adjusting forms, upper spring seat 16 that setting spring 15 is arranged on pilot stem 14 and lower spring cup Between, nut 18 of adjusting is threadeded with pilot valve lid 17, and its lower end withstands in the upper surface of upper spring seat 16, Fixing with the end of handle 19 in pilot stem 14 upper end and be connected, the middle part of handle 19 is led with being fixedly mounted on The support of valve gap 17 upper surface is hinged.Pilot valve lobe 11 can be opened by pressure handle 19 with pull-up pilot stem 14, Realize manually releasing pressure.

Claims

1. a momentum safety valve, including pilot valve, main valve, pilot valve include pilot valve body (10), pilot valve lid (17), Pilot valve lobe (11), pilot stem (14) and spring pressure setting device, main valve includes main valve body (1), master Valve gap (7), main valve seat (4), main valve clack (2), main valve stem (3), main spring (6), pilot valve and main valve Intake channel connect with pressure vessel, the control mouth (20) of pilot valve connects with the control chamber (9) of main valve； It is characterized in that the import of pilot valve and control to use normally closed structure between mouth (20)；Main valve seat (4) is inside and outside two The bowl shaped structure of layer, constitutes discharge chamber (5), this discharge chamber (5) and main valve seat (4) between its outer layer and internal layer Intake channel connects, and main valve seat (4) lower surface is provided with sealing surface of seat, and this sealing surface of seat is by main valve lid (7) It is fitted in the intake channel of main valve body (1)；Main valve clack (2) is the bowl shaped structure of opening upwards, installs At the inlet side of main valve seat (4), its upper surface is shaped with the valve clack sealing surface cooperated with sealing surface of seat, Center, upper surface is fixing with main valve stem (3) lower end to be connected；Main valve lid (7) is the cylindrical knot of inside and outside two-layer Structure, between its outer layer and internal layer constitute exhaust space, this exhaust space respectively with main valve lid (7) upper surface The discharge chamber (5) of outlet and main valve seat (4) is connected, the internal chamber wall of main valve lid (7) internal layer and piston (8) Periphery movable sealing coordinates, and constitutes and control between the inner chamber of piston (8) upper surface and main valve lid (7) internal layer Chamber (9), piston (8) lower surface is fixing with main valve stem (3) upper end to be connected；Main spring (6) compression is installed Between main valve seat (4) internal layer inner bottom surface and piston (8) lower surface.

Momentum safety valve the most according to claim 1, is characterized in that control mouth (20) and the row of pilot valve Arranging piston-type switch in putting the valve pocket between mouth (12), this piston-type switch is fixedly mounted on valve by sealing Piston bush (22) and the piston boit (13) coordinated with this piston bush (22) movable sealing in chamber form, and live Push rod (21), pilot valve are installed between stick harness (13) lower surface centre bore and pilot valve lobe (11) back side centre bore Bar (14) lower end is inserted in the centre bore of piston boit (13) upper surface, and piston bush (22) sidewall is made respectively The through hole connected with control mouth (20) and floss hole (12), piston boit (13) middle part periphery is had to be shaped with Annular groove, the position of this annular groove when pilot valve lobe (11) closed mode with piston bush (22) sidewall The alignment of two through holes.

Momentum safety valve the most according to claim 1 and 2, is characterized in that spring pressure setting device It is arranged between pilot stem (14) and pilot valve lid (17), at pilot stem (14) upper end and handle (19) End fixing connect, the middle part of handle (19) and the support being fixedly mounted on pilot valve lid (17) upper surface Hinged.