CN209557715U - A kind of adjustable check valve - Google Patents

Abstract

To realize flow adjusting, non-return, anti-leak function, reduce user equipment expense expenditure and installation space needed for maintenance cost and reduction valve as far as possible simultaneously, the utility model provides a kind of adjustable check valve, including valve seat, valve body, flap, rocking bar and valve rod, one end of rocking bar and valve rod are hinged；Its improvement is: further including worm wheel head and guide rail；Worm wheel head is connected with valve rod one end；Defining the face opposite with valve clack sealing surface is the flap back side, and guide rail is connected in the flap back side；Long arc-shaped holes are offered on guide rail；The radian of long arc-shaped holes is centered on valve rod axle center；The rocking bar other end is connected with guide rail, and rocking bar can arcuately long hole move.The utility model is in conventional check valves structure basis, guide rail is additionally arranged at flap back, guide rail is flexibly connected with rocking bar, worm wheel head also is additionally arranged in valve stem end simultaneously, it can be moved with ovable valve stem, rocking bar by rotation of worm gear head, so as to which valve opening is adjusted flexibly, the control of pipeline flow size is realized.

Description

A kind of adjustable check valve

Technical field

The utility model belongs to valve technology field, and in particular to a kind of adjustable check valve.

Background technique

Check-valves is opening and closing element (flap) self gravity or bullet opened by pipeline fluid kinetic energy, then rely on valve internal Spring force and the pressure of return water realize a kind of valve of closing function.Therefore, existing check-valves is in the case where no back pressure, The pressure of very little can make valve wide open.But in the application of many pipelines, it is sometimes desirable to which the aperture of control valve controls its stream Amount and it also requires valve has check function, while there is a need for being able to forcibly close valve to prevent its leakage.

It in traditional scheme, is used in series by using regulating valve and check-valves, reaches adjusting and check function, in this way User equipment expense expenditure and maintenance cost are not only increased, and it also requires bigger installation space.

Utility model content

In order to realize flow adjusting, non-return, anti-leak function, while reducing user equipment expense expenditure and dimension as far as possible Installation space needed for protecting cost and reducing valve, the utility model provide a kind of adjustable check valve.

The technical solution of the utility model is:

A kind of adjustable check valve, including valve seat, valve body, setting be in the intracorporal flap of valve, rocking bar and valve rod, the one of rocking bar It holds hinged with valve rod；It is characterized in that further include worm wheel head and guide rail；

The worm wheel head is connected with one end of valve rod；

The back side that the face opposite with valve clack sealing surface is flap is defined, the guide rail is connected in the back side of the flap；Institute It states and offers long arc-shaped holes on guide rail；The radian of the long arc-shaped holes is centered on the axle center of the valve rod；

The other end of the rocking bar is connected with the guide rail, and rocking bar can be moved along the long arc-shaped holes on guide rail.

Further, one end of the worm wheel head and valve rod is keyed.

Further, the other end of the rocking bar is connected with the guide rail by pin shaft and split pin, and pin shaft is passed through and shaken Long arc-shaped holes on the inner hole of boom end and the guide rail, split pin are arranged in the through-hole of pin shaft.

Further, the other end setting of the valve rod is fluted, is provided with divided ring in groove, the valve rod it is another End is limited on the flange at tail end of valve body by divided ring.

Further, heap is welded with wear-resisting, corrosion resistant alloy metal layer on the sealing surface of the flap and valve seat.

Further, the metal layer is stainless steel layer or hard alloy layer.

Further, the valve deck and valve body are made of cast steel, and the flap is made of forged steel.

The utility model has the advantages that:

1. the utility model is additionally arranged guide rail in conventional check valves structure basis, at the back of flap, by guide rail with shake Bar is flexibly connected, while being also additionally arranged worm wheel head in the end of valve rod, can be with ovable valve stem, rocking bar (In by rotation of worm gear head Do not have under Fluid pressure, worm wheel head opening and closing not will drive flap movement) movement, it is real so as to which the aperture of valve is adjusted flexibly The control of existing pipeline flow size.

2. the utility model is voluntarily closed by flap self gravity in pipeline decompression, the bigger sealing of valve back pressure is more Tightly, when the minimum seal pressure needed for back pressure is less than sealing pair, valve will appear leakage, at this moment can be come with rotation of worm gear head It is forcibly closed, solves conventional check valves when back pressure is too low, the problem of valve leaks.

3. the utility model can also use in pipeline as block valve, when pipeline needs that fluid is truncated, traling snail Wheel head can realize that fluid is truncated, and traditional check-valves is that do not have the function.

4. current limliting, truncation, non-return are integrated in one by the utility model, required installation space is small, and maintenance cost is low, economical It is practical.

5. the utility model when sealing pair is closed without opposite because sliding, therefore valve tightness is good, and service life is high；Because of valve Door internal structure is unblocked at cleanliness, therefore valve flow resistance coefficient is low, and the pressure loss is small.

6. the utility model is applied widely, it can be used for the distributing systems such as domestic water, petroleum, chemical industry fluid and steam In.

Detailed description of the invention

Fig. 1 is the structure chart of the utility model adjustable check valve.

Fig. 2 is the A direction view of Fig. 1.

Fig. 3 is enlarged view at I in Fig. 2.

Fig. 4 be II in Fig. 2 at enlarged drawing.

Fig. 5 is the utility model adjustable check valve truncation status diagram.

Fig. 6 is the utility model adjustable check valve full-gear schematic diagram.

Closed mode schematic diagram when Fig. 7 is the utility model adjustable check valve non-return.

Fig. 8 is the utility model adjustable check valve adjustment state schematic diagram.

Appended drawing reference:

1- lifting bolt, 2- valve deck, 3- gasket, the first flat key of 4-, 5- rocking bar, 6- guide rail, 7- valve body, 8- flap, 9- Valve seat, 10- valve rod, 11- filler, 12- gland, the first bolt of 13-, the second flat key of 14-, 15- bracket, 16- worm wheel head, 17- head end flange, 18- nut, the second bolt of 19-, 20- divided ring, 21- end cap, 22- sealing ring, the first screw of 23-, 24- tail End flanges, the second screw of 25-, 26- pin shaft, 27- split pin

Specific embodiment

The utility model progress is illustrated clear and completely with reference to the accompanying drawing.

As shown in Figure 1, the adjustable check valve of the utility model includes valve body 7, valve deck 2, flap 8, rocking bar 5, valve rod 10 With the equal components of worm wheel head 16.

Valve body 7 is three way type, and the both sides of valve body 7 are respectively equipped with fluid inlet channel and fluid outlet channels, fluid into Mouth channel, fluid outlet channels are connected to the upper chamber of valve body 7；

Lifting bolt 1 is arranged on valve deck 2, hangs installation convenient for opening；The upper end of valve body 7 is arranged in valve deck 2, logical with valve body 7 Cross nut 18, the second bolt 19 is fastenedly connected, the upper port of valve body 7 is closed；Sealing is additionally provided between valve deck 2 and valve body 7 Pad 3；

Flap 8 is arranged in valve body 7, for fluid import and export channel to be truncated when valve is closed；The back side of flap 8 is (i.e. The face opposite with the sealing surface of flap 8) on be provided with arc-shaped guide rail 6；Long arc-shaped holes, the arc of long arc-shaped holes are offered on guide rail 6 Degree is using 10 axle center of valve rod as rotation center, and 5 lower wall central point of rocking bar is formed by camber line as motion profile, in pipeline without pressure When power, rotation is opened in the rotation of rocking bar 5 not will drive the movement of flap 8, and flap 8 makees arcuate movement under the pressure of fluid with 6 radian of guide rail, to Always without departing from valve seat 9 when lower closing；

Flap 8 and guide rail 6 can be monoblock cast, are also possible to fission and are fixedly connected；

One end of rocking bar 5 is the disk with through-hole, and the side of disk offers through-hole, and guide rail 6 passes through the through-hole, is utilized Pin shaft 26 passes through the through-hole and guide rail 6 of disk side, is then lockked with split pin 26, realizes one end and the guide rail 6 of rocking bar 5 It is flexibly connected, after connection, rocking bar 5 can be moved along guide rail 6；5 other end of rocking bar is the cylinder with through-hole, the through-hole on the cylinder It is provided with keyway and threaded hole, the end of rocking bar 5 is connect by the first flat key 4 with valve rod 10, and fixed using the second screw 25；When When valve rod 10 rotates, it is able to drive the rotation of rocking bar 5.It is provided with split pin 27 in the through-hole of pin shaft 26, falls off to prevent shotpin axis 26；

Valve rod 10 is arranged in valve body 7, after one end of valve rod 10 is pierced by the head end flange of valve body 7, passes through the second flat key 14 It being connect with worm wheel head 16, by 14 power transmission of the second flat key to valve rod 10 when worm wheel head 16 starts, valve rod 10 is acted with worm wheel head 16, The other end of valve rod 10 is fixed on the flange at tail end 24 of valve body 7 by divided ring 20, and divided ring 20 can prevent valve rod 10 axial It is mobile；The flange at tail end 24 of valve body 7 is closed by end cap 21, and end cap 21 and flange at tail end 24 connect by the way that the first screw 23 is fixed It connects, and is equipped with sealing ring 22 between flange at tail end 24 and end cap 21；It is provided with and fills out in the stuffing-box of the head end flange 17 of valve body 7 Material 11, filler 11 compress sealing by gland 12；15 bracket 15 of bracket is provided between head end flange 17 and worm wheel head 16 It plays a transition role, connection worm wheel head 16 and head end flange 17), it is fixedly connected, is propped up with one end of bracket 15 by the first bolt 13 The other end of frame 15 is fixedly connected with worm wheel head 16；

In order to make valve that there is good sealing performance and high life property, the sealing surface of flap 8 and valve seat 9 can built-up welding not Becoming rusty, steel or hard alloy etc. be wear-resisting, corrosion-resistant metal alloy layer.

The course of work and principle of the utility model:

Truncation state:

In pipeline normal operation, the utility model is in the open state.If desired it when cut-out cock downstream fluid, closes The utility model can be achieved with, and rotate clockwise worm wheel head 16 at this time, since worm wheel head 16 and valve rod 10 pass through the second flat key 14 Transmission connection, the rotation of worm wheel head 16 just will drive valve rod 10 and rotate towards each other, because valve rod 10 and rocking bar 5 pass through the rotation of the second flat key 4 Connection, the rotation of valve rod 10 just will drive rocking bar 5 and rotate towards each other, and because rocking bar 5 is movable even by the guide rail 6 of pin shaft 26 and flap 8 It connects, rocking bar 5, which rotates clockwise, drives flap 8 to move down, and until flap 8 and valve seat 9 fit closely, valve is closed at this time, such as Shown in Fig. 5.

Full-gear:

When pipeline needs to connect with normal trandfer fluid, rotation of worm gear head 16 counterclockwise, the rotation of worm wheel head 16 drives valve Bar 10 and rocking bar 5 rotate towards each other, and are flexibly connected because the guide rail of flap 86 passes through pin shaft 26 with rocking bar 5, in no Fluid pressure In the case where, only rocking bar 5 rotates counterclockwise upwards along guide rail 6, and flap 8 will not follow rocking bar 5 to move, but in inlet fluid Under pressure, flap 8 can follow rocking bar 5 closely and move upwards, until valve wide open, as shown in Figure 6.

Non-return state:

When pipeline needs to close pump to stop fluid conveying or power-off termination of pumping suddenly, the Fluid pressure for flowing through valve is instantaneously Zero, flap 8 is fallen after rise rapidly, in the case where self gravity using 6 camber line of guide rail as motion profile, until flap 8 and valve seat 9 The fitting of two sealing surfaces.After the of short duration time, valve export fluid starts to flow back, when the pressure acted on 8 back side of flap When more than minimum seal pressure needed for the sealing pair of valve seat 9 and flap 8, valve reaches sealing effect, as shown in Figure 7.But when The Fluid pressure of reflux is too small, and when being not enough to overcome sealing pair minimum seal pressure, valve will generate leakage, at this time can be suitable Hour hands traling worm wheel head 16 to drive rocking bar 5 to flap Final 8 row seal, it is this take external force forcibly close valve be it is existing its The function that its check-valves does not have.

Adjustment state:

Starting worm wheel head 16 can just make flap 8 be in any open position, and the aperture of such control valve can be real Now to the control of pipeline flow, as shown in Figure 8.Meanwhile under different opening when pipeline decompression, flap 8 can also be at itself Under gravity, fallen after rise rapidly using 6 camber line of guide rail as motion profile until being bonded with the sealing surface of valve seat 9, so that valve closes It closes, to realize automatic braking function.

Claims (7)

1. a kind of adjustable check valve, including valve seat, valve body, setting are in the intracorporal flap of valve, rocking bar and valve rod, one end of rocking bar It is hinged with valve rod；It is characterized by also including worm wheel heads and guide rail；

The worm wheel head is connected with one end of valve rod；

The back side that the face opposite with valve clack sealing surface is flap is defined, the guide rail is connected in the back side of the flap；It is described to lead Long arc-shaped holes are offered on rail；The radian of the long arc-shaped holes is centered on the axle center of the valve rod；

The other end of the rocking bar is connected with the guide rail, and rocking bar can be moved along the long arc-shaped holes on guide rail.

2. adjustable check valve according to claim 1, it is characterised in that: one end key of the worm wheel head and valve rod connects It connects.

3. adjustable check valve according to claim 2, it is characterised in that: the other end of the rocking bar and the guide rail are logical It crosses pin shaft to be connected with split pin, pin shaft passes through the long arc-shaped holes on the inner hole and the guide rail of rocking bar end, and split pin is set It sets in the through-hole of pin shaft.

4. adjustable check valve according to claim 1 or 2 or 3, it is characterised in that: the other end of the valve rod is provided with Groove is provided with divided ring in groove, and the other end of the valve rod is limited on the flange at tail end of valve body by divided ring.

5. adjustable check valve according to claim 4, it is characterised in that: built-up welding on the sealing surface of the flap and valve seat There is wear-resisting, corrosion resistant alloy metal layer.

6. adjustable check valve according to claim 5, it is characterised in that: the metal layer is stainless steel layer or hard Alloy-layer.

7. adjustable check valve according to claim 6, it is characterised in that: the valve body is made of cast steel, the valve Valve is made of forged steel.