CN2474825Y

CN2474825Y - Multifunction self driving piston valve

Info

Publication number: CN2474825Y
Application number: CN 01248031
Authority: CN
Inventors: 郭玉臣; 郭玉润
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-29
Filing date: 2001-05-29
Publication date: 2002-01-30
Anticipated expiration: 2011-05-29

Abstract

The utility model discloses a multifunctional self-driven piston valve, the upper portion of a main valve body 2 is provided with a cylinder-shaped control chamber 1 with the diameter bigger than that of a main valve 6-1. The cylinder at the upper end of a piston valve core 3 is engaged with the control chamber, the lower end thereof is in contact with a main valve seat 6. A control valve 14 is arranged on a flange disk 11. A one-way throttle 10 with series connection is connected between the inlet opening of the main valve body 1 and the control valve through a pressure guiding tube 9. And a one-way throttle 19 with series connection and a switch 18 are connected between the outlet opening of the main valve body 8 and the control valve through the pressure guiding tube. The valve can not only be opened or closed completely, but also precisely control the opening extent with the advantages of simple structure, low cost, low fault rate and the like.

Description

Multi-functional self-driving type piston valve

The utility model belongs to a kind of valve that blocks and regulate pipeline medium flow.

In media feed system, use various gate valves and stop valve now widely, these valves all are to utilize manually opened mode, and are big when the valve latus rectum, when pressure is high, will make the labor intensity of operating personnel height, sometimes even be difficult to operation; For overcoming the above problems, be extensive use of electric valve now, it has increased by a sleeving valve door operating gear, and needs external power supply, thus it have valve complex structure, processing difficulties, cost height, shortcoming such as fault is many, maintenance load is big; ZL90204108 has announced a kind of " hydraulic control piston valve; " ZL96205931 has announced a kind of " two water level hydraulic control valve ", ZL92226457 has announced a kind of " multi-functional self-pressure type piston valve ", above valve all is to utilize the opened by pressure of medium itself and the valve of closing, this class valve has can only complete opening or close, its aperture can not be regulated, though have can regulate aperture, can accurately not control and regulate aperture.

The purpose of this utility model is a kind of multi-functional self-driving type piston valve of design, and it can not only be realized complete opening or close, and can also realize the part unlatching, and can control and regulate aperture accurately.Characteristics such as it should have rapid operation, simple in structure, easy processing, cost is low, rate of fault is low, maintenance load is few.

The utility model comprises main valve body 2, piston valve core 3, control valve 14, one-way throttle valve 10, one-way throttle valve 19, switch 18, main valve body 2 tops are provided with the columniform control chamber 12 bigger than main valve 6-1 diameter, the cylindrical body 3-1 of piston valve core 3 upper ends and the inner periphery 12-1 of control chamber 12 form and are slidingly matched, the lower end surface 3-2 of piston valve core 3 contacts with main valve gate seat 6 sealings of valve body 2 inside, control valve 14 is installed on the blind flange 11 above the control chamber 12, control valve 14 communicates with control chamber 12, between the import 13 of the import 1 of main valve body 2 and control valve 14, be connected with tandem one-way throttle valve 10 with medium flow direction control valve 14 through PRESSURE PIPE 9, be connected with tandem one-way throttle valve 19 with medium flow direction control valve 14 through PRESSURE PIPE 21 between the import 16 of the outlet 8 of main valve body 2 and control valve 14, switch 18 is connected with the outlet 15 of control valve 14 and the outlet 8 of main valve body 2 respectively through honeycomb duct 21-1.During work, by adjusting control valve 14, i.e. pressure medium in the can regulate control chamber 12, thus make piston valve core 3 under the effect of its two ends medium thrust difference, realize opening and closing.Accurately the aperture of control main valve reaches the purpose of regulating flow.

The utility model is according to hydraulic principle, very little try hard to recommend moving switch 18 and just can realize opening and closing to main valve having the easy advantage of rapid operation with one; Adjust control valve 14, just can regulate the pressure medium of control chamber 12, accurately control the aperture of main valve, realize regulating the purpose of flow; When the inlet pressure bust, piston valve core 3 can be closed main valve automatically under the outlet pressure action of medium, prevents that medium from flowing backwards, and has check function; Adjust tandem one-

way throttle valve

10 and 19, just can regulate valve port and close the speed of closing, realize the Slow Close function, and can eliminate water hammer effect fully, effectively protect pump and pipeline with non-return.This valve also has simple in structure, easy processing, cost is low, rate of fault is low, maintenance load is few advantage.

Fig. 1 is the structural representation of the utility model when being in closed condition, and Fig. 2 is the structural representation of control valve 14, and Fig. 3 is the structural representation of tandem one-

way throttle valve

10 and 19, and Fig. 4 is the A-A sectional view of Fig. 3.

Embodiment one: present embodiment is made up of main valve body 2, piston valve core 3, guide way 4, control valve 14, one-way throttle valve 19, one-way throttle valve 10, switch 13.Main valve body 2 left ends are imports 1, and right-hand member is outlet 8, and the centre is a main valve gate seat 6, and its top is provided with the cylindrical control chamber 12 bigger than main valve 6-1 diameter.The cylindrical body 3-1 of piston valve core 3 upper ends and the inner periphery 12-1 of control chamber 12 form and are slidingly matched, on the cylndrical surface 3-1 of piston valve core 3 upper ends, seal ring 7 is installed, piston valve core 3 lower end surface 3-2 contact with 6 sealings of main valve gate seat, and are provided with O-ring seals 5 on surface of contact.Piston valve core 3 lower ends are equipped with the guide way 4 that matches with the internal surface of main valve 6-1.Control valve 14 is installed on the blind flange 11 of control chamber 12 tops, and communicates with control chamber.Between the import 13 of import 1 and control valve 14, be connected with PRESSURE PIPE 9, a tandem one-way throttle valve 10 is installed on PRESSURE PIPE 9, make the medium can only be from import 1 flow direction control valve 14.Between outlet 8 and the straightthrough port 20 of tandem one-way throttle valve 19, be connected a PRESSURE PIPE 21, between the import 16 of the side port 17 of one-way throttle valve 19 and control valve 14, be connected a PRESSURE PIPE 21, between the outlet 15 of another straightthrough port 20 of one-way throttle valve 19 and control valve 14, be connected with PRESSURE PIPE 21-1, on PRESSURE PIPE 20-1, be provided with switch 18.Main valve body 2 is straight-through type valve body, right-angle type valve body or other structural type in the present embodiment.

Embodiment two: present embodiment and embodiment one are different is that control valve 14 is by poppet valve core 25, valve body 24, upper valve body 29 and pressure regulation assembly are formed down.Following valve body 24 is connected the lower end of upper valve body 29, the radial direction through hole at following valve body 24 middle parts is import 13 and import 16, axial central through hole 22 is arranged at following valve body 24 bottoms, and axial center hole 23 is arranged at following valve body top, and poppet valve core 25 constitutes control valve port 26 with the center hole 23 and the upper-end surface of following valve body 24.On upper valve body 29, be provided with control valve outlet 15.On the guide rod above the poppet valve core 25 28, be provided with the pressure regulation assembly.The pressure regulation assembly is made up of spring 27, spring seat 30, regulator bolts 34, nut 33, on guide rod 28, be with pressure adjusting spring 27 and spring seat 30, guide rod 28 tops are fixedly connected with elastic scheibe 31, upper valve body 29 internal surfaces and spring seat 30 excircles form and are slidingly matched, upper valve body 29 upper ends are connected with nut 30, the lower end surface that is positioned at the regulator bolts 34 of upper valve body 29 inside forms with spring seat 30 and contacts, the outside thread on regulator bolts 34 tops matches with the internal thread on nut 33 tops, is provided with seal ring 32 on the external cylindrical surface of regulator bolts 34 bottoms.Other composition is identical with embodiment one with annexation.

Embodiment three: what present embodiment and embodiment one were different is that tandem one-way throttle valve 19 is made up of valve body 38, throttling needle 35, nut 36, nonreturn valve core 39, Returnning spring 41, joint 43, spring seat 42.Valve body 38 middle part radial direction through hole are two straightthrough ports 20, and valve body 38 inner straight mouths 20 left ends have axial center hole 44, and valve body about 38 ends are connected with nut 36, joint 43 respectively.In the throttling needle 35 centering holes 44, the excircle of throttling needle 35 middle part shoulders 45 and center hole 44 internal surfaces form and are slidingly matched, O RunddichtringO 37 is installed on shoulder 45, and the outside thread of throttling needle 35 left ends matches with the internal thread of nut 36 left ends.The mode that the right-hand member of valve body 38 inner straight mouths 20 increases progressively with diameter is provided with center hole 47, center hole 49 and the center hole 51 that is interconnected.Center hole 47 left ends are the throttle valve seat 46 that the flat plane of ream forms, and the needle point 48 of throttling needle 35 right-hand members stretches in the center hole 47 and constitutes the throttle orifice of can regulate flow with throttle valve seat.Nonreturn valve core 39 left ends are provided with the cylinder 39-1 that radial cross section is a square (or triangle), and cylinder 39-1 is positioned at center hole 49, and the arc corner angle 50 of cylinder 39-1 form with the internal surface of center hole 49 and are slidingly matched.Be to increase flow area, have center hole 54 and radial direction through hole 53 at the left end of cylinder 39-1.The right-hand member plane of center hole 49 is unidirectional valve seat 52, the check-valve port that the left end of nonreturn valve core 39 and unidirectional valve seat 52 constitute in order to the break-make pressure medium.Left end at nonreturn valve core 39 is provided with O-ring seals 40, is provided with Returnning spring 41 and spring seat 42 at the right-hand member of nonreturn valve core 39, and spring seat 42 is connected with joint 43.Joint 43 center holes are side port 17.

The difference of the structure of tandem one-way throttle valve 10 and tandem one-way throttle valve 19 is to be provided with shutoff 20-1 on a straightthrough port 20, and other composition is identical with tandem one-way throttle valve 19 with annexation.

Above-mentioned throttle valve and one-way valve are combined in series, and structure is compact.Its nonreturn valve core 39 left end cylinder 39-1 are only contacted with hole wall by corner angle, and this structure can overcome in the medium impurity jam phenomenon of nonreturn valve core 39 for a long time.Installation O-ring seals 40 can reduce the machining accuracy of spool, and sealability is improved greatly.This structure also can be used in other hydraulic system separately.

This multi-functional self-driving type piston valve has following function:

One, the Slow Close of main valve and open function:

The pressure medium of main valve body import 1 at first acts on piston valve core 3 lower end surfaces, produces upwards thrust, makes piston valve core 3 produce the upwards trend of slide-open.The pressure medium of import 1 simultaneously is through PRESSURE PIPE 9 and tandem one-way throttle valve 10 flow direction control valves 14.Because of the effect of tandem one-way throttle valve 19 is arranged, pressure medium can not flow out from control valve import 16.At this moment as switch 18 cuts out, then pressure medium can not flowed out by center hole 23.Therefore the pressure medium that enters from import 1 can only flow to control chamber 12 through center hole 22.Pressure acts on the upper-end surface of piston valve core 3, and produces downward thrust, makes piston valve core 3 produce the trend that glides and close.Along with entering of media in the control chamber 12, its internal pressure raises gradually, and near the pressure of import 1, because of the bearing area of piston valve core upper-end surface greater than lower end bearing area (being main valve 6-1 area), so piston valve core 3 downward sliding closing main valves.Because PRESSURE PIPE 9 is thinner, the time that charges into medium to control chamber 12 is longer, just compares slowly so close the time of main valve.The throttling needle 35 of regulating string data one-way throttle valve 10 is with regard to the can regulate flow, and control Slow Close speed.

When needs are opened main valve, open switch 18, the pressure medium of control chamber backs down poppet valve core 25, and pressure medium will flow to the outlet 8 of main valve body through center hole 23, outlet 15 and switch 18 and PRESSURE PIPE 21.The very fast reduction of control chamber 12 pressure this moment, and near the pressure that exports 8, piston valve core upwards slides, main valve is opened.

Two, main valve aperture control function:

After switch 18 is opened, regulate the upper-lower position of regulator bolts 34.When regulator bolts 34 is in highest point, move on the pressure regulation assembly, poppet valve core 25 will be controlled valve port 26 and open fully, and the pressure medium in the control chamber 12 flows out under unresisted condition, and the pressure of control chamber 12 is near the pressure of outlet 8, and main valve is opened fully.

Regulator bolts 34 is moved down, and then the pressure regulation assembly pressure that overcomes medium moves down, and near control valve port 26.This moment, the medium active force increased, and jack-up poppet valve core 25 is with spring 27 compressions.Pressure medium is increased by the resistance of controlling valve port 26, and the pressure of control chamber 12 increases.The suffered downward thrust in piston valve core 3 upper-end surfaces increases, and forces piston valve core 3 to move down, and the aperture of main valve is reduced.But the upwards thrust that acts on after moving down on piston valve core 3 lower end surfaces increases, and stops it to move down, and behind thrust-balancing up and down, piston valve core 3 stops to move, and stops on a certain position.By the position of up-down adjustment regulator bolts 34, can accurately regulate the aperture of main valve.Because above balance is transient equiliblium, its degree of regulation is higher.

When regulator bolts 34 was moved to minimum point, pressure adjusting spring 27 was pressed on poppet valve core 25 on the control valve gate seat 26, and pressure medium is less than the pressure of pressure adjusting spring, and poppet valve core 25 can't be backed down, and this moment, main valve can be closed fully.

Three, the Slow Close check function of main valve:

During normal operation, as special circumstances such as power failures, pump is quit work, import 1 pressure drops to immediately and exports 8 pressure when following, and pressure medium flows backwards.The poppet valve core 25 of control valve 14 loses thrust upwards and falls at this moment, will control valve port 26 and close.Exporting 8 pressure medium this moment can only flow backwards through the import 16 of PRESSURE PIPE 21, one-way throttle valve 19 and control valve 14 and enter control chamber 12.At this moment control chamber 12 pressure are increased to gradually near outlet pressure, make piston valve core 3 stressed downward sliding closing main valves, realize check function.Regulate the throttling needle 35 of one-way throttle valve 19, with regard to the flow of can regulate refluence medium, thus the speed that the control non-return is closed.

Four, the voltage stabilizing function of main valve:

During normal the operation, main valve outlet or inlet pressure raise because of certain reason or reduce.The pressure of control chamber 12 also must increase or reduce.Piston valve core 3 corresponding declines or rising, the main valve aperture turns down automatically or opens greatly.Thereby outlet or inlet pressure are reduced or rising, reduce pressure surge, realize pressure stabilization function to a certain degree.

Claims

1, multi-functional self-driving type piston valve, it comprises main valve body (2), piston valve core (3), control valve (14), one-way throttle valve (10), one-way throttle valve (19), switch (18), it is characterized in that main valve body (2) top is provided with the columniform control chamber (12) bigger than main valve (6-1) diameter, the cylindrical body (3-1) of piston valve core (3) upper end forms with the inner periphery (12-1) of control chamber (12) and is slidingly matched, the lower end surface (3-2) of piston valve core (3) contacts with main valve gate seat (6) sealing of valve body (2) inside, control valve (14) is installed on the top blind flange (11) of control chamber (12), control valve (14) communicates with control chamber (12), between the import (13) of the import (1) of main valve body (2) and control valve (14), be connected with tandem one-way throttle valve (10) with medium flow direction control valve (14) through PRESSURE PIPE (9), be connected with tandem one-way throttle valve (19) with medium flow direction control valve (14) through PRESSURE PIPE (21) between the import (16) of the outlet (8) of main valve body (2) and control valve (14), switch (18) is connected with the outlet (15) of control valve (14) and the outlet (8) of main valve body (2) respectively through honeycomb duct (21).

2, multi-functional self-driving type piston valve according to claim 1 is characterized in that piston valve core (3) lower end is equipped with the guide way (4) that matches with the internal surface of main valve (6-1).

3, multi-functional self-driving type piston valve according to claim 1, it is characterized in that control valve (14) is by poppet valve core (25), down valve body (24), upper valve body (29) and pressure regulation assembly are formed, poppet valve core (25) constitutes control valve port (26) with the center hole (23) and the upper-end surface of following valve body (24), is provided with the pressure regulation assembly on the guide rod (28) of poppet valve core (25) top.

4, multi-functional self-driving type piston valve according to claim 3, it is characterized in that the pressure regulation assembly is made up of spring (27), spring seat (30), regulator bolts (34), nut (33), on guide rod (28), be with pressure adjusting spring (27) and spring seat (30), upper valve body (29) upper end is connected with nut (30), the lower end surface that is positioned at the inner regulator bolts (34) of upper valve body (29) forms with spring seat (30) and contacts, and the outside thread on regulator bolts (34) top matches with the internal thread on nut (33) top.

5, multi-functional self-driving type piston valve according to claim 1, it is characterized in that tandem one-way throttle valve (19) is by valve body (38), throttling needle (35), nut (36), nonreturn valve core (39), Returnning spring (41), joint (43), spring seat (42) is formed, valve body (38) inner straight mouth (20) left end has axial center hole (44), end is connected with nut (36) respectively about valve body (38), joint (43), in throttling needle (35) the centering hole (44), the outside thread of throttling needle (35) left end matches with the internal thread of nut (36) left end, the mode that the right-hand member of valve body (38) inner straight mouth (20) increases progressively with diameter is provided with the center hole (47) that is interconnected, center hole (49) and center hole (51), center hole (47) left end is the throttle valve seat (46) that the flat plane of ream forms, and the needle point (48) of throttling needle (35) right-hand member stretches in the center hole (47) and constitutes the throttle orifice of can regulate flow with throttle valve seat.

6, multi-functional self-driving type piston valve according to claim 5, the right-hand member plane that it is characterized in that center hole (49) is unidirectional valve seat (52), the left end of nonreturn valve core (39) and unidirectional valve seat (52) constitute the check-valve port in order to the break-make pressure medium, right-hand member at nonreturn valve core (39) is provided with Returnning spring (41) and spring seat (42), and spring seat (42) is connected with joint (43).

7, multi-functional self-driving type piston valve according to claim 6, it is characterized in that it is foursquare cylinder (39-1) that nonreturn valve core (39) left end is provided with radial cross section, cylinder (39-1) is positioned at center hole (49), the arc corner angle (50) of cylinder (39-1) and the internal surface of center hole (39) form and are slidingly matched, and have center hole (54) and radial direction through hole (53) at the left end of cylinder (39-1).

8, multi-functional self-driving type piston valve according to claim 6 is characterized in that being provided with O-ring seals (40) at the left end of nonreturn valve core (39).

9, multi-functional self-driving type piston valve according to claim 1 is characterized in that being provided with O-ring seals (5) on the surface of contact of piston valve core (3) and main valve (6).