CN203202329U

CN203202329U - Bypass differential valve

Info

Publication number: CN203202329U
Application number: CN 201320049498
Authority: CN
Inventors: 卓旦春
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-28
Filing date: 2013-01-28
Publication date: 2013-09-18
Anticipated expiration: 2023-01-28

Abstract

The utility model provides a bypass differential valve, belongs to the field of mechanical technology and solves the problem that the locking gear of an existing bypass differential valve is complex in structure and cannot be applied to differential valves with springs. The bypass differential valve comprises a valve body with an internal cavity; the bottom of the valve body is provided with a water inlet which is communicated with the cavity, the lateral part of the valve body is provided with a water outlet which is communicated with the cavity, and the inside of the valve body is provided with a valve core and an adjusting rod. The adjusting rod is fixedly connected onto the valve body in an axial direction, and the inner end of the adjusting rod is threadedly connected with adjusting blocks which are fixedly connected with the valve body in a circumferential direction; springs are arranged between the valve core and the adjusting blocks, and under the action of the elastic force of the spring, the valve core is provide with a tendency to closing the water inlet; the outer end of the adjusting rod extends outside the valve body and provided with a hand wheel in a sleeve mode, the hand wheel is connected with the adjusting rod through a screw, and a positioning structure which can circumferentially fix the hand wheel and the valve body is arranged between the hand wheel and the valve body. The bypass differential valve is simple and compact in structure and simple in the locking process and has a high use valve.

Description

A kind of bypass compression difference limen

Technical field

The utility model belongs to field of mechanical technique, relates to a kind of valve, particularly a kind of bypass compression difference limen.

Background technique

Pressure difference valve is self-balanced differential pressure valve, and it does not need the external energy, relies on to be transferred the variation of medium self pressure to automatically adjust, and eliminates the residual pressure head of pipeline and the flow deviation that pressure surge causes automatically, constant user's inlet outlet pressure differential.It is specially adapted in household metering or the automatic control system, helps the stable system operation.

In order to regulate the setting pressure difference of pressure difference valve, normally adjustable lever is regulated, it is compressed to regulate the spring of back between adjustable lever and spool.Thereby spring compression back has reached and has changed the purpose that it sets pressure reduction.But existing pressure difference valve can not lock after regulating, and handwheel is touched its setting pressure reduction of back and can change, and influences pressure difference valve and normally uses.

Its publication number of Chinese patent CN2143705Y provides a kind of " the spur-geared locking framework of butterfly valve ", it drives small gear by handwheel by rotating shaft, small gear drives gearwheel, gearwheel drives valve rod, the following connection valve plate of valve rod, casing at driving mechanism is installed lock screw, under the rotating shaft spring is arranged, and spring must not block and rotated postponing the locked screw of small gear in the rotating shaft.And make quill and pinion shaft in the rotating shaft that handwheel drives, handwheel and quill can be taken away during inoperation.As can be seen, it is by lock screw small gear to be locked, and it is also just locked that small gear can't rotate the spool of butterfly valve.Its complex structure of lock gear, and it also can't be applied in the pressure difference valve with spring.

Summary of the invention

The purpose of this utility model is the problems referred to above that exist at prior art, and a kind of bypass compression difference limen simple in structure, easy to use is provided.

The purpose of this utility model can realize by following technical proposal: a kind of bypass compression difference limen, comprise the inner valve body of cavity that is, described valve body bottom has the water intake that communicates with above-mentioned cavity, described valve body sidepiece has the water outlet that communicates with above-mentioned cavity, be provided with spool and adjustable lever in the valve body, it is characterized in that, described adjustable lever axially is connected on the valve body, the regulating block that described adjustable lever the inner is threaded and circumferentially is connected with valve body, has spring between described regulating block and the spool, elastic force effect lower valve core at spring has the trend that above-mentioned water intake is sealed, valve body is stretched out in the adjustable lever outer end, described adjustable lever outer end is with handwheel, links by screw between described handwheel and the adjustable lever, has the position structure that both are circumferentially fixed between described handwheel and the valve body.

Flowing medium enters in the water outlet process through water intake, by the elastic force that spring applies spool, eliminates the residual pressure head of pipeline and the flow deviation that pressure surge causes automatically, constant user's inlet outlet pressure differential.When needing to change the setting pressure reduction of bypass compression difference limen, unclamp position structure rotation handwheel and get final product, by position structure handwheel and valve body are locked again after regulating.

In above-mentioned bypass compression difference limen, described handwheel is cylindric, and described position structure comprises some teeth two in some teeth one of inboard, handwheel port and the valve end outside, when handwheel sleeve at valve end, above-mentioned teeth one can be meshed with teeth two.

After handwheel was fastened on the valve body, teeth one can make both circumferentially fixing with teeth two engagements.By screw handwheel and valve body are linked then, both axial restraints finally can make firm the linking together of handwheel and valve body, have realized changing it and have set behind the pressure reduction and the purpose that is locked.

In above-mentioned bypass compression difference limen, described handwheel is cylindric, and described position structure comprises the recessed locating slot of the inboard positioning strip that protrudes of handwheel and the valve end outside, when handwheel sleeve at valve end, above-mentioned positioning strip is positioned at the locating slot place.

Obviously, teeth one and teeth two are replaced with positioning strip, locating slot after, can realize that equally handwheel firmly is connected with valve body.

In above-mentioned bypass compression difference limen, described valve body sidepiece has viewing window, and viewing window is corresponding with position, above-mentioned spring place.

Whether stable being between adjustable lever and the spool of spring just can get information about by viewing window.

In above-mentioned bypass compression difference limen, described handwheel middle part has the attachment hole that axially runs through along it, described attachment hole inboard has the retaining edge of protrusion, and above-mentioned screw is positioned at the connection hole and the screw upper end is resisted against retaining along last, and the screw lower end is threaded with above-mentioned adjustable lever outer end.Retaining guarantees stable being connected on the valve body of handwheel along between screw upper end and adjustable lever outer end.

In above-mentioned bypass compression difference limen, described retaining is along being positioned at attachment hole middle part and retaining along attachment hole being divided into two parts up and down: upper cavity and lower chamber, and above-mentioned screw upper end is positioned at the upper cavity place, and lower chamber and adjustable lever outer end are circumferentially fixing.

Rotate handwheel and can drive the adjustable lever rotation, but handwheel can move up and down with respect to adjustable lever.

In above-mentioned bypass compression difference limen, described upper cavity place has the recessed restraining groove of annular, has jump ring in the described restraining groove, and above-mentioned screw upper end is between jump ring and retaining edge.

By jump ring that screw is spacing in attachment hole, when can regulating, screw can from attachment hole, not come off.

In above-mentioned bypass compression difference limen, have guiding element in the described valve body, above-mentioned spool is positioned at the guiding element place.

Guarantee that by guiding element spool can stable moving up and down.

In above-mentioned bypass compression difference limen, has seal ring between described guiding element and the spool.

Guiding element cooperates the water flowing chamber of body cavity for sealing that can make the guiding element bottom with seal ring, and the installation cavity of the valve body interior wall on guiding element top for installing for above-mentioned spring, adjustable lever etc.

In above-mentioned bypass compression difference limen, described regulating block is the nut that is threaded on the adjustable lever, and described nut sidepiece has the gib block of protrusion, and described gib block is embedded in above-mentioned viewing window place.

Viewing window is the bar hole that runs through the valve body sidepiece, and gib block is positioned at the viewing window place makes regulating block and valve body circumferentially fixing.

Compared with prior art, in this bypass compression difference limen handwheel can with the stable fastening of valve body, simple in structure, compact.Simultaneously, handwheel sleeve behind valve end, is locked by screw and gets final product, it is easier that locking process seems.In addition, can learn the stressing conditions of spring by the viewing window operator, thereby learn that whether this differential-pressure bypass valve is in normal working state, has than higher use value.

Description of drawings

Fig. 1 is the perspective view of this bypass compression difference limen.

Fig. 2 is this bypass compression difference limen sectional structure schematic representation.

Fig. 3 is the sectional structure schematic representation of this bypass compression difference limen other direction.

Fig. 4 is the sectional structure schematic representation that this bypass compression difference limen handwheel is in rotary state.

Among the figure, 1, valve body; 1a, water intake; 1b, water outlet; 1c, teeth two; 1d, guiding element; 2, spool; 3, adjustable lever; 4, handwheel; 4a, teeth one; 4b, attachment hole; 4c, retaining edge; 4d, upper cavity; 4d1, restraining groove; 4e, lower chamber; 5, screw; 6, viewing window; 7, spring; 8, regulating block; 8a, gib block; 9, jump ring; 10, seal ring.

Embodiment

As shown in Figure 1, this bypass compression difference limen comprises that inside is the valve body 1 of cavity, and valve body 1 bottom has the water intake 1a that communicates with above-mentioned cavity, and valve body 1 sidepiece has the water outlet 1b that communicates with above-mentioned cavity.

As shown in Figures 2 and 3, be provided with spool 2, adjustable lever 3 in the valve body 1.Adjustable lever 3 axially is connected on the valve body 1, and adjustable lever 3 is inner to be threaded with regulating block 8, has spring 7 between regulating block 8 and the spool 2, has the trend that above-mentioned water intake 1a is sealed at the elastic force effect lower valve core 2 of spring 7.Valve body 1 is stretched out in adjustable lever 3 outer ends, and adjustable lever 3 outer ends are with handwheel 4, links by screw 5 between handwheel 4 and the adjustable lever 3, and handwheel 4 ends have the position structure of circumferentially fixing with valve body 1 end.

Handwheel 4 is cylindric, and position structure comprises some teeth one 4a of inboard, handwheel 4 port and some teeth two 1c in the outside, valve body 1 end, can be meshed with teeth two 1c when handwheel 4 is enclosed within above-mentioned teeth one 4a in valve body 1 end.Certainly, it also is feasible adopting another according to the actual conditions position structure, particularly, another position structure comprises the recessed locating slot of the inboard positioning strip that protrudes of handwheel and the valve end outside, when handwheel sleeve is positioned at the locating slot place at the above-mentioned positioning strip of valve end.

Valve body 1 sidepiece has viewing window 6, and viewing window 6 is the bar hole that runs through valve body 1 sidepiece, and viewing window 6 is corresponding with position, above-mentioned spring 7 place.Handwheel 4 middle parts have the attachment hole 4b that axially runs through along it, and the retaining that attachment hole 4b inboard has protrusion is along 4c, and screw 5 is positioned at attachment hole 4b place and screw 5 upper ends are resisted against retaining along on the 4c, and screw 5 lower ends are threaded with above-mentioned adjustable lever 3 outer ends.Retaining between screw 5 upper ends and adjustable lever 3 outer ends, guarantees handwheel 4 stable being connected on the valve body 1 along 4c.In the present embodiment, retaining is positioned at attachment hole 4b middle part and retaining is divided into two parts up and down along 4c with attachment hole 4b along 4c: upper cavity 4d and lower chamber 4e, and screw 5 upper ends are positioned at upper cavity 4d place, and lower chamber 4e and adjustable lever 3 outer ends circumferentially are connected.

Upper cavity 4d place has the recessed restraining groove 4d1 of annular, has jump ring 9 in the restraining groove 4d1, screw 5 upper ends jump ring 9 with keep off along between the 4c.In addition, have guiding element 1d in valve body 1, spool 2 is positioned at guiding element 1d place, has seal ring 10 between guiding element 1d and the spool 2.

Flowing medium enters in the water outlet 1b process through water intake 1a, by the elastic force that spool 2 is applied of spring 7, eliminates the residual pressure head of pipeline and the flow deviation that pressure surge causes automatically, constant user's inlet outlet pressure differential.

As Fig. 2 and shown in Figure 4, when needing to change the setting pressure reduction of bypass compression difference limen, get final product by the elastic force that rotates handwheel 4 change springs 7.Particularly, unclamp screw 5 backs and rotate handwheel 4, owing to handwheel 4 and adjustable lever 3 outer ends circumferentially are connected, and adjustable lever 3 axially is connected with valve body 1, and therefore, handwheel 4 drives adjustable lever 3 and rotates.The regulating block 8 that has been threaded on the adjustable lever 3, regulating block 8 can only move up and down and can not rotate with respect to valve body 1.Obviously, handwheel 4 drives that regulating block 8 moves up and down in adjustable levers 3 rotation processes, and the two ends of spring 7 act on respectively on regulating block 8 and the spool 2, has changed the elastic acting force that acts on the spool 2 after spring 7 is compressed, that is to say to have changed its setting pressure.Again screw 5 is penetrated in the handwheel 4 attachment hole 4b after regulating, by instrument rotating screw 5, be resisted against retaining along on the 4c until screw 5 upper ends, when retaining is pressed between screw 5 upper ends and adjustable lever 3 outer ends along 4c, teeth one 4a on the handwheel 4 is meshed with teeth two 1c on the valve body 1, guarantees that handwheel 4 and valve body 1 also can obtain axial restraint in the time of circumferentially fixing.

In the said structure, regulating block 8 is for being threaded in the nut on the adjustable lever 3, and the nut sidepiece has the gib block 8a of protrusion, and gib block 8a is embedded in above-mentioned viewing window 6 places.Viewing window 6 is for running through the bar hole of valve body 1 sidepiece, and gib block 8a is positioned at viewing window 6 places makes regulating block 8 and valve body 1 circumferentially fixing.

Claims

1. bypass compression difference limen, comprise the inner valve body of cavity (1) that is, described valve body (1) bottom has the water intake (1a) that communicates with above-mentioned cavity, described valve body (1) sidepiece has the water outlet (1b) that communicates with above-mentioned cavity, be provided with spool (2) and adjustable lever (3) in the valve body (1), it is characterized in that, described adjustable lever (3) axially is connected on the valve body (1), the regulating block (8) that described adjustable lever (3) the inner is threaded and circumferentially is connected with valve body (1), has spring (7) between described regulating block (8) and the spool (2), elastic force effect lower valve core (2) at spring (7) has the trend that above-mentioned water intake (1a) is sealed, valve body (1) is stretched out in adjustable lever (3) outer end, described adjustable lever (3) outer end is with handwheel (4), link by screw (5) between described handwheel (4) and the adjustable lever (3), have the position structure that both are circumferentially fixed between described handwheel (4) and the valve body (1).

2. bypass compression difference limen according to claim 1, it is characterized in that, described handwheel (4) is cylindric, described position structure comprises some teeth one (4a) of handwheel (4) inboard, port and some teeth two (1c) in the outside, valve body (1) end, when handwheel (4) is enclosed within valve body (1) end, above-mentioned teeth one (4a) can be meshed with teeth two (1c).

3. bypass compression difference limen according to claim 1, it is characterized in that, described handwheel (4) is cylindric, described position structure comprises the recessed locating slot of the inboard positioning strip that protrudes of handwheel (4) and the outside, valve body (1) end, is positioned at the locating slot place when handwheel (4) is enclosed within the above-mentioned positioning strip in valve body (1) end.

4. according to claim 1 or 2 or 3 described bypass compression difference limens, it is characterized in that described valve body (1) sidepiece has viewing window (6), and viewing window (6) and above-mentioned spring (7) to locate the position corresponding.

5. according to claim 1 or 2 or 3 described bypass compression difference limens, it is characterized in that, described handwheel (4) middle part has along its attachment hole that axially runs through (4b), described attachment hole (4b) inboard has the retaining of protrusion along (4c), above-mentioned screw (5) is positioned at that attachment hole (4b) is located and screw (5) upper end is resisted against retaining along on (4c), and screw (5) lower end is threaded with above-mentioned adjustable lever (3) outer end.

6. bypass compression difference limen according to claim 5, it is characterized in that, described retaining is positioned at attachment hole (4b) middle part and keeps off edge (4c) along (4c) attachment hole (4b) is divided into two parts up and down: upper cavity (4d) and lower chamber (4e), above-mentioned screw (5) upper end is positioned at upper cavity (4d) to be located, and lower chamber (4e) is circumferentially fixing with adjustable lever (3) outer end.

7. bypass compression difference limen according to claim 6, it is characterized in that, described upper cavity (4d) locates to have the recessed restraining groove (4d1) of annular, has jump ring (9) in the described restraining groove (4d1), and above-mentioned screw (5) upper end is positioned between jump ring (9) and the retaining edge (4c).

8. according to claim 1 or 2 or 3 described bypass compression difference limens, it is characterized in that having guiding element (1d) in the described valve body (1), above-mentioned spool (2) is positioned at guiding element (1d) and locates.

9. bypass compression difference limen according to claim 8 is characterized in that, has seal ring (10) between described guiding element (1d) and the spool (2).

10. bypass compression difference limen according to claim 4, it is characterized in that, described regulating block (8) is for being threaded in the nut on the adjustable lever (3), and described nut sidepiece has the gib block (8a) of protrusion, and described gib block (8a) is embedded in above-mentioned viewing window (6) and locates.