CN204573223U

CN204573223U - Reduction valve

Info

Publication number: CN204573223U
Application number: CN201520251569.5U
Authority: CN
Inventors: 周晓普
Original assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Current assignee: Ningbo Amico Copper Valves Manufacturing Co Ltd
Priority date: 2015-04-24
Filing date: 2015-04-24
Publication date: 2015-08-19
Anticipated expiration: 2025-04-24

Abstract

The utility model discloses a kind of reduction valve, relate to and be a kind ofly applied in the water system of resident, and play the pipeline valve of reduction and stable hydraulic pressure effect, its structure is mainly by valve body, valve seat orifice, support, king-rod, diaphragm, spring, the formation such as regulator and handwheel, there is in this support piston hole and supporting piston, king-rod for driving flap to seal keying valve seat orifice is then elevated and is movably arranged in piston hole, and in the middle part of king-rod and piston, diaphragm is fixed with one, the cavity of resorption that during work, medium will be flowed into by the throttle orifice in valve body below piston, made diaphragm drive piston movement again by the active force to diaphragm, and the keying function of valve is namely achieved in conjunction with the pushing tow of spring, because piston structure and diaphragm structure together constitute the balanced type driving structure of valve, therefore the pressure of valve body water outlet will not affect by the pressure surge of water intake, reduction valve after improvement also has reasonable in design, pressure regulation is convenient, performance-adjustable is advantages of higher comparatively.

Description

Reduction valve

Technical field

The utility model relates to a kind of pipeline valve, specifically refers to reduction valve.

Background technique

Reduction valve is in the water system of a kind of resident of being applied to and plays the pipeline valve of reduction and stable hydraulic pressure effect, it reduces to the outlet pressure of a certain needs by adjustment inlet pressure, and relies on the energy of medium itself automatically to keep stable to make outlet pressure.From hydromechanical viewpoint, reduction valve is the throttle element that a local resistance can change, namely by changing orifice size, the kinetic energy of flow velocity and fluid is changed, cause the different pressure losses, thus reach decompression object, then rely on the adjustment of control and regulation system, the fluctuation of downstream pressure and spring force are balanced each other, makes downstream pressure keep constant in certain margin of error.At present, traditional adjustable reduction valve is all adopt unbalanced diaphragm structure, and the pressure of valve body water outlet can be subject to the change of water intake pressure medium and change, and does not have the effect of steady pressure; Therefore, reduce the use shortcoming of pressure valve for Conventional tunable, design a kind of rational in infrastructure, performance-adjustable is higher, the stable reduction valve of pressure balance can be kept extremely to be necessary.

Summary of the invention

Technical problem to be solved in the utility model be to overcome the defect of prior art and a kind of reasonable in design is provided, pressure regulation is convenient, performance-adjustable is higher, the reduction valve that can effectively keep pressure balance stable.

Technical problem of the present utility model is achieved through the following technical solutions:

A kind of reduction valve, comprise valve body, interconnect and be arranged on the water intake at valve body two ends and water outlet, be arranged on valve seat orifice between entery and delivery port, valve gap that sealing is arranged on body top and the king-rod that lifting activity is installed; Be provided with diaphragm between described valve body and valve gap, above this diaphragm, be divided into closed epicoele, below diaphragm, be divided into the cavity of resorption being communicated with water intake; Described king-rod upper end connects regulator through diaphragm, in the middle part of king-rod and fastened to each other between diaphragm, king-rod lower end is provided with and forms with described valve seat orifice the flap sealing and open and close, be provided with the support that sealing is installed in described valve body, in this support, be provided with the through piston hole of upper and lower axis and the supporting piston be movably arranged in piston hole; Described king-rod lifting is movably arranged in piston hole, and in the middle part of this king-rod, piston and diaphragm be fixed with one; Be provided with the spring be sleeved on outside king-rod in described epicoele, this spring upper end thrusting action is on regulator, and lower end thrusting action is on diaphragm and piston.

Described support comprises support shaft and is arranged on the tray deck at support shaft top; Described support shaft sealed bottom is arranged in valve seat orifice; The upper and lower axis of described piston hole is through to be arranged in support shaft, and described support shaft outer peripheral surface is provided with the osculum of multiple connection piston hole; Form cavity of resorption between described tray deck and diaphragm, tray deck is provided with multiple water inlet being communicated with cavity of resorption and water intake respectively.

Described support shaft bottom surface is provided with seal groove, and described flap end face is provided with and forms with described seal groove the seal ring sealing and open and close.

Described king-rod comprises valve rod and piston rod, and this valve rod upper end is connected on piston, and valve rod lower end is stretched out piston hole and is provided with flap; Described piston-rod lower end and piston, diaphragm are fixed with one, and piston rod upper end connects regulator, and described spring housing is contained in outside piston rod.

Described regulator comprises the regulator bolts being threaded in valve gap top, this regulator bolts upper end is stretched out valve gap and to be in transmission connection handwheel, regulator bolts lower end enters epicoele through valve gap, and be provided with positioning hole in regulator bolts lower end, described piston rod movable upper end stretches in described positioning hole.

Described regulator bolts underpart is provided with setscrew nut, and described piston rod upper end is stretched in positioning hole through setscrew nut activity.

The lower end that described regulator bolts stretches into epicoele is provided with upper spring seat, and described piston-rod lower end is provided with the lower spring cup described piston-rod lower end, piston, diaphragm are fixed with one, and described both ends of the spring difference pushing installation is on upper and lower spring seat.

Described valve gap inner top surface is provided with the axle sleeve to downward-extension, and described upper spring seat is arranged in described axle sleeve, is respectively equipped with guiding rib and the guiding groove of motion guide between upper spring seat and axle sleeve.

Described handwheel end face is provided with dust cover.

The throttle orifice being communicated with water intake and cavity of resorption is respectively provided with in described valve body.

Compared with prior art, the utility model mainly sets up a supporting structure with piston hole and piston in valve body, and lifting activity is also sealed the king-rod and piston that open and close valve seat orifice, diaphragm is fixed with one, the cavity of resorption that during work, medium will be flowed into by the throttle orifice in valve body below piston, made diaphragm drive piston movement again by the active force to diaphragm, and the keying function of valve is namely achieved in conjunction with the pushing tow of spring, because piston structure and diaphragm structure together constitute the balanced type driving structure of valve, therefore the pressure of valve body water outlet will not affect by the pressure surge of water intake, reduction valve after improvement also has reasonable in design, pressure regulation is convenient, performance-adjustable is advantages of higher comparatively.

Accompanying drawing explanation

Fig. 1 is sectional structure schematic diagram of the present utility model.

Fig. 2 is the mounting structure sectional view of regulator, king-rod, diaphragm, spring, piston and support.

Fig. 3 is the three-dimensional exploded view of Fig. 2.

Embodiment

To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.

As shown in Fig. 1 ~ Fig. 3,1. valve seat orifice, 2. valve body, 21. water intakes, 22. water outlets, 23. throttle orifices, 3. support, 31. support shafts, 32. tray decks, 33. piston holes, 34. seal grooves, 35. osculums, 36. water inlets, 4. diaphragm, 5. valve gap, 51. axle sleeves, 6. spring, 7. regulator bolts, 71. positioning holes, 72. setscrew nuts, 8. upper spring seat, 9. king-rod, 91. valve rods, 92. piston rods, 10. handwheel, 11. dust covers, 12. socket head screws, 13. nuts, 14. lower spring cups, 15. pistons, 16. flaps, 17. cavity of resorptions, 18. seal rings.

Reduction valve, be in the water system of a kind of resident of being applied to as shown in Figure 1 and play reduction and the pipeline valve of stable hydraulic pressure effect, its structure is mainly made up of valve body 2, valve seat orifice 1, support 3, piston 15, king-rod 9, diaphragm 4, spring 6, regulator and handwheel 10 etc.

Described valve body 2 adopts hollow tubular structure, the through water intake of level 21 and water outlet 22 is respectively equipped with at valve body 2 two ends, entery and delivery port is all set to the structural type be threaded, be provided with valve seat orifice 1 between entery and delivery port, this valve seat orifice is a line between shaft axis and entery and delivery port is the mounting hole of vertical positional relationship.

Described valve body 2 top is the hollow tubular structure upwards extended, and this hollow tubular structure top is provided with and is threaded and is connected the valve gap 5 of sealing by "O"-ring, and the joint between valve gap and valve body 2 arranges hard-wired diaphragm 4 and support 3.

Described diaphragm 4 is separated into mutual disconnected epicoele and cavity of resorption 17 by valve body 2 and valve gap 5; Wherein epicoele is positioned at above diaphragm 4 is enclosed construction, and cavity of resorption 17 is positioned at below diaphragm 4.

Described support 3 is connected in valve body 2 by the worm structure thread seal at top, diaphragm 4 is then arranged on above support 3, its circumferential outer edge place will be pressed in support 3 end face by valve gap 5 top, in order to make the connection of diaphragm 4 more reliable, diaphragm 4 circumferential outer edge bottom surface is also provided with a circle and installs convex, correspondingly be provided with a circle for the diaphragm groove installing tuck pointing dress at support 3 end face, therefore be threaded after pushing tow by valve gap 5 diaphragm 4 and the connection of support 3 in valve body 2 can be made more firm.

As shown in Figure 2 and Figure 3, to described support 3 it be made up of with the disk-shaped support dish 32 being arranged on support shaft top columniform support shaft 31.

Be arranged in valve seat orifice 1 by "O"-ring sealing bottom described support shaft 31, in support shaft 31, be provided with the through piston hole 33 of upper and lower axis and the supporting piston 15 be movably arranged in piston hole; Meanwhile, support shaft 31 outer peripheral surface is provided with the rectangular-shaped osculum 35 of three circumference uniform distributions, and is communicated with piston hole 33 and water outlet 22 respectively by three osculums 35.

Described tray deck 32 excircle upwards turns down in bowl-shape, and cavity of resorption 17 is exactly a chamber structure being formed between tray deck 32 and diaphragm 4, tray deck 32 is also provided with the fan shape water intake 36 of four circumference uniform distributions, and these four water inlets are all communicated with cavity of resorption 17; Meanwhile, be also provided with a throttle orifice 23 in valve body 2, its effect is connected with cavity of resorption 17 through throttle orifice 23 and four water inlets 36 by water intake 21.

Described king-rod 9 lifting is movably arranged in piston hole 33, and the shaft axis of its lifting activity is overlapping with the shaft axis of valve seat orifice 1, and this king-rod 9 is mainly made up of valve rod 91 and piston rod 92.

Described valve rod 91 threaded upper ends is connected on piston 15, valve rod 91 lower end is stretched out piston hole 33 and is provided with flap 16, this flap end face is provided with the fixing seal ring 18 of a circle setting-in, corresponding be provided with in support 3 bottom surface a seal groove 34 with coordinate the seal ring 18 on flap 16 carry out sealing open and close, therefore when piston 15 be with ovable valve stem 91 be elevated just can drive flap 16 opening/shutting valve.

Described piston rod 92 lower end is threaded on piston 15 through in the middle part of diaphragm 4, also be provided with in piston rod 92 lower end by the fastening lower spring cup 14 of nut 13, and by lower spring cup so that piston rod 92 lower end, piston 15, diaphragm 4 are fixed with one, therefore diaphragm 4 pressurized just can drive piston 15 to move, and piston rod 92 upper end connects regulator.

Described regulator comprises the regulator bolts 7 being threaded in valve gap 5 top, this regulator bolts upper end is stretched out valve gap 5 and is connected with handwheel 10 in the mode of socket head screw 12 and spline joint, be provided with dust cover 11 to be hidden by screw hole at handwheel end face, play attractive in appearance and dust-proof effect; Regulator bolts 7 lower end enters epicoele through valve gap 5, which is provided with the upper spring seat 8 be threaded, this upper spring seat is arranged on valve gap 5 inner top surface in the axle sleeve 51 of downward-extension, and between upper spring seat 8 and axle sleeve 51, be also respectively equipped with the guiding rib and guiding groove that play motion guide effect; Described regulator bolts 7 lower end is provided with a positioning hole 71, and its effect stretches into for piston rod 92 movable upper end; Meanwhile, regulator bolts 7 underpart is also provided with setscrew nut 72, makes piston rod 92 upper end could activity stretch in positioning hole 71 through after setscrew nut 72, makes piston rod 92 motion positions more accurate.

The spring 6 be sleeved on outside piston rod 92 is provided with in described epicoele, this spring upper end thrusting action is on upper spring seat 8, lower end thrusting action on lower spring cup 14, the initial pressure of its initial tension of spring i.e. valve, and operate regulator to realize adjustment by handwheel 10.

Working principle of the present utility model is: four water inlets 36 of medium in the water intake 21 of valve body 2 through throttle orifice 23, tray deck 32 flow in cavity of resorption 17, when the pressure medium of water intake 21 is greater than the pretightening force of spring 6, diaphragm 4 will drive piston 15 to move upward, and then by valve rod 91, seal ring on flap 16 18 is formed to seal with the seal groove 34 bottom support 3, realize the closing function of valve; When the pressure medium of water intake 21 is less than spring 6 pretightening force, diaphragm 4 moves downward under spring 6 thrusting action, and drive piston 15 also to move downward, and then by valve rod 91, flap 16 is also moved downward, seal ring 18 on flap departs from the seal groove 34 bottom support 3, medium now in water intake 21 enters water outlet 22 by piston hole 33, three osculums 35, realizes the open function of valve.

In addition, because valve have employed balance type Design of Piston Structure, the pressure that the upper and lower end face of piston 15 is born is cancelled out each other, therefore the action of piston 15 only and between the setting pressure of spring 6 exists pressure reduction relation, thus the pressure realizing valve outlet 22 is not subject to the pressure fluctuations of valve water intake 21.

Claims

1. a reduction valve, comprise valve body (2), interconnect and be arranged on the water intake (21) at valve body (2) two ends and water outlet (22), be arranged on valve seat orifice (1) between entery and delivery port, valve gap (5) that sealing is arranged on valve body (2) top and the king-rod (9) that lifting activity is installed; Be provided with diaphragm (4) between described valve body (2) and valve gap (5), be divided into closed epicoele above this diaphragm, diaphragm (4) below is divided into the cavity of resorption (17) being communicated with water intake (21); Described king-rod (9) upper end connects regulator through diaphragm (4), fastened to each other between king-rod (9) middle part and diaphragm (4), king-rod (9) lower end is provided with the flap (16) forming with described valve seat orifice (1) and seal and open and close, it is characterized in that the support (3) being provided with sealing installation in described valve body (2), in this support, be provided with the through piston hole of upper and lower axis (33) and the supporting piston (15) be movably arranged in piston hole; Described king-rod (9) lifting is movably arranged in piston hole (33), and this king-rod (9) middle part, piston (15) and diaphragm (4) are fixed with one; Be provided with in described epicoele and be sleeved on king-rod (9) spring outward (6), this spring upper end thrusting action is on regulator, and lower end thrusting action is on diaphragm (4) and piston (15).

2. reduction valve according to claim 1, is characterized in that described support (3) comprises support shaft (31) and is arranged on the tray deck (32) at support shaft top; Described support shaft (31) sealed bottom is arranged in valve seat orifice (1); Described piston hole (33) upper and lower axis is through to be arranged in support shaft (31), and described support shaft (31) outer peripheral surface is provided with the osculum (35) of multiple connection piston hole (33); Form cavity of resorption (17) between described tray deck (32) and diaphragm (4), tray deck (32) is provided with multiple water inlet (36) being communicated with cavity of resorption (17) and water intake (21) respectively.

3. reduction valve according to claim 2, it is characterized in that described support shaft (31) bottom surface is provided with seal groove (34), described flap (16) end face is provided with the seal ring (18) forming with described seal groove (34) and seal and open and close.

4. reduction valve according to claim 1 and 2, it is characterized in that described king-rod (9) comprises valve rod (91) and piston rod (92), this valve rod (91) upper end is connected on piston (15), and valve rod (91) lower end is stretched out piston hole (33) and is provided with flap (16); Described piston rod (92) lower end and piston (15), diaphragm (4) are fixed with one, and piston rod (92) upper end connects regulator, and described spring (6) is sleeved on piston rod (92) outward.

5. reduction valve according to claim 4, it is characterized in that described regulator comprises the regulator bolts (7) being threaded in valve gap (5) top, this regulator bolts upper end is stretched out valve gap (5) and to be in transmission connection handwheel (10), regulator bolts (7) lower end enters epicoele through valve gap (5), be provided with positioning hole (71) in regulator bolts (7) lower end, described piston rod (92) movable upper end stretches in described positioning hole (71).

6. reduction valve according to claim 5, is characterized in that described regulator bolts (7) underpart is provided with setscrew nut (72), and described piston rod (92) upper end is stretched in positioning hole (71) through setscrew nut (72) activity.

7. reduction valve according to claim 5, it is characterized in that the lower end that described regulator bolts (7) stretches into epicoele is provided with upper spring seat (8), described piston rod (92) lower end is provided with the lower spring cup (14) described piston-rod lower end, piston (15), diaphragm (4) are fixed with one, and described spring (6) two ends difference pushing installation is on upper and lower spring seat.

8. reduction valve according to claim 7, it is characterized in that described valve gap (5) inner top surface is provided with the axle sleeve (51) to downward-extension, described upper spring seat (8) is arranged in described axle sleeve (51), is respectively equipped with guiding rib and the guiding groove of motion guide between upper spring seat (8) and axle sleeve (51).

9. reduction valve according to claim 5, is characterized in that described handwheel (10) end face is provided with dust cover (11).

10. reduction valve according to claim 1 and 2, is characterized in that being provided with the throttle orifice (23) being communicated with water intake (21) and cavity of resorption (17) respectively in described valve body (2).