CN201258987Y

CN201258987Y - Check valve

Info

Publication number: CN201258987Y
Application number: CNU200720194273XU
Authority: CN
Inventors: 特德·马克文
Original assignee: VAL MATIC VALVE&MFG CORP
Current assignee: VAL MATIC VALVE&MFG CORP
Priority date: 2007-11-28
Filing date: 2007-11-28
Publication date: 2009-06-17
Anticipated expiration: 2017-11-28

Abstract

The utility model provides a check valve which comprises a valve body, a spring, a hinge pivoted with the valve body as well as a concave part arranged in a shell; the hinge is connected with a pivoting movable valve clack; the spring is jointed with the valve clack; the spring also comprises a near end; the near end surrounds the hinge and extends, and is contiguously jointed with the concave part and does not penetrate the valve body; the spring also comprises a far end which is jointed with the valve clack; the spring is not fixed on the valve body; the utility model also provides a check valve provided with an indicating device; the indicating device comprises a revealed part used for providing the visual indication of the valve clack position, a jointing part connected with the revealed part and used for jointing the valve clack, and a movable seal part used for providing an interface between the inside of the valve body and the outside of the valve body; the jointing part and the revealed part are connected with a seal part; moreover, the indicating device comprises a mechanism which maintains the jointing part to be contacted with the valve clack. An electric switch can be provided with a position used for detecting the revealed part, and transmitting proper signals.

Description

Safety check

Technical field

The present invention relates in general to the safety check with spring return mechanism and/or indicating device.

Background technique

Safety check with the close mechanism that is made of elastic valve plate generally has been used for feedwater and drainage system, to prevent the refluence in such system.Usually, these elastic valve plate safety check have when operating position about flow path and are installed in valve block in the valve body with miter angle.Valve block comprises usually and integratedly is molded into valve block and rigidity is held in place in valve body hinge.Elastic valve plate about 35 degree of pivot usually arrives open positions, and complete flow region or approximate complete flow region are provided thus.The range of movement of preferred 35 degree because it provides short closing stroke, is avoided the bump of valve in operating position like this.Above-mentioned design is very reliable, because a moving member-elastic valve plate is only arranged.And the integrated connection between hinge and the valve block is avoided passing valve block and is formed connection between hinge and the valve block.

Summary of the invention

But the present invention aims to provide the safety check that a kind of more reliable, more durable and structure is simple relatively, be easy to can guarantee with low-cost production sealing effect.

Safety check of the present invention comprises: have the valve body of entrance and exit, be formed with flow path between described entrance and exit;

Be mounted and be used for transverse to described flow path and be pivotally connected to the hinge of the recess of described valve body, described be hinged be useful on will export the operating position of isolating from inlet and provide access and export between pivot movement valve block between the open position that is communicated with;

With the spring of described valve block towards described operating position biasing, described spring engages with valve block, described spring also comprises near-end, this near-end extends around described hinge, and the described recess of contiguous engagement and do not pass described valve body, described spring also comprises far-end, and this far-end engages with described valve block, and described spring is not fixed to described valve body;

Be positioned at the recess of housing, described recess also comprises straight portion, and described straight portion engages with the near-end of described spring.

The present invention provides a kind of safety check in another embodiment, comprises indicating device, and it can be at factory or the on-the-spot top that is installed to safety check, so that the position indication of described valve block to be provided.Described indicating device also can provide the high-visibility indication and not interfere the operation of valve.Described indicating device comprises: be used to provide the exposed part of described valve block position vision indication, described exposed part extends in described valve body outside; Be connected to the mating part of described exposed part, described mating part are arranged on and are used to engage described valve block in the described valve body; Be used to provide the removable sealed member at the interface between described valve inner and the described valve body outside, described mating part and described exposed part are connected to described sealed member; With the mechanism that keeps described mating part to contact with described valve block.Described indicating device also provides the installation of electric limit switch, is used for the remote indication valve position.

Beneficial effect of the present invention comprises: elastic valve plate is used the spring return mechanism that is contained in the form of springs in the valve body fully, does not need to pass or the process valve body, and more reliable and durable valve is provided thus.This mechanism is simple relatively, and is easy to low-cost production; Spring only engages with valve block, and does not need as mentioned above to pass valve block or be connected to valve block by fastening piece, and passes valve block or be connected to the inefficacy that valve block may cause sealing in time by fastening piece.

Description of drawings

Fig. 1 is the sectional view according to the valve body of embodiment of the invention manufacturing and spring biasing elastic valve plate safety check, and valve block and the spring that is in the open and close position is shown;

Fig. 2 is the side view of spring mechanism shown in Fig. 1.

Fig. 3 is the sectional view of valve body, valve block safety check and the indicating device made according to a further embodiment of the invention.

Fig. 4 is the Zoom Side sectional view of the indicating device shown in Fig. 3.

Fig. 5 is the sectional view of indicating device rotation 90 degree among Fig. 4.

Fig. 6 is for show installing the side view of the optional limit switch that is used to engage indicating device.

Embodiment

The elastic valve plate safety check 10 that has valve body 12 shown in Fig. 1, valve body 12 have main or main body 14, comprise inlet 16 and outlet 18.Main body 14 also forms the flow path by arrow 20 indications.The main body 14 of valve body 12 comprises the open top 22 by lid 24 closures.Joint between the main body 14 of lid 24 and valve body 12 forms recess 26.

Valve 10 comprise have far-end 30, the elastic valve plate parts 28 of near-end 32 and intermediate portion 34.Near-end 32 is connected to pin 34.Near-end 32 and pin 34 all are contained in the recess 26.Valve block 28 can be a rigidity or flexible, and if flexible, then can be by the elastomeric polymer made.

Valve block 28 is having flow of fluid not move in the operating position by gravity, backflow effect when the valve body 12 usually, perhaps its can by shown in the figure and the spring that describes below be biased in the operating position.

Among Fig. 1, valve block 28 is biased in the operating position by spring 36, and described spring 36 has near-end 38 and far-end 40.The near-end 38 of spring 36 extends around the near-end 32 of valve block 28, and the straight portion 42 of the recess 26 that also provides with main body 14 by valve body 12 engages.Spring 36 does not cause because the near-end 38 of spring 36 engages the rotation or the pivot movement of the near-end 38 of the spring 36 that causes with the straight portion 42 of recess 26 to the pivot movement between the upper position shown in open position or Fig. 1 at the lower position shown in operating position or Fig. 1.

Spring 36 comprises along the rear side 45 of valve block 28 and extending and very near its intermediate portion 44.As a result, spring 36 or directly engage, or be arranged to very near valve block 28 with valve block 28, therefore, spring 36 forward or opposite direction be not easy to catch or gather the chip that flows through valve body 12.

Except the near-end 38 of spring 36 valve block 28 from the pivot motion course that is closed into open position, keep static, the near-end 32 of valve block 28 and pin 34 also keep static at valve block 28 from the pivot motion course that is closed into open position, vice versa.The near-end 32 of the near-end 38 of spring 36, pin 34 and valve block 28 is contained in the recess 26 closely or frictionally.

Valve body 12 comprises the seat 46 that is used to engage valve block 28 seating surfaces, and the seating surface of valve block 28 also can comprise Stamping Steel Ribbon 48.Valve body 12 can comprise similar chocking construction 50, is used to engage valve block 28 when it moves to open position.

Valve block 28 can be made by the elastomeric polymer material.Hinge pin 34 embeds in the far-end 32 of valve block 28.And stiffening element 52 also can be used for increasing the structural integrity and the weight of valve block 28.

The concrete structure of sheet spring 36 further is shown among Fig. 2.The main body 14 of tip 54 engage valve body 12 of the near-end 38 of spring 36 as shown in fig. 1, and prevents any rotation or the pivot movement of spring 36 close ends 38.At relaxed state, the intermediate portion 44 of spring 36 is an arc, shown in the left side among Fig. 2.As a result, when mounted, spring 36 engages valve block 28 (referring to Fig. 1), and takes the position shown in Fig. 2 centre.From entering the mouth 16 to outlet 18 when flowing through valve body 12 (referring to Fig. 1), valve block is taked among Fig. 2 towards the position shown in the upper right.Far-end 40 bendings of spring 36 are not so that it can damage the surface 46 of valve block 28.The additional springs (not shown) can be stacked on the top of spring 36, so that stronger closing force to be provided.

Spring 36 is made by the high-tensile stainless steel materials.Spring 36 can use mould by the steel plate punching press and easily form.The thickness of spring is less relatively, 0.5mm for example, and this provides high suppleness.The length of spring 36 and width select the global geometric shape coupling with valve 10.Particularly, spring 36 answers long enough to contact with the intermediate portion 34 of valve block 28, or extends to the intermediate portion 34 that just passes through valve block 28, as shown in fig. 1.The power that the width of spring 36 can apply according to the size and the expectation of valve 10 changes to 65cm from 2.5cm.In extreme adverse current situation, spring 36 can increase one or more additional springs provides additional force.

Elastic valve plate 28 is used the spring return mechanism that is contained in spring 36 forms in the valve body 12 fully.Do not need to pass or process valve body 12, more reliable and durable valve is provided thus.This mechanism is simple relatively, and is easy to low-cost production.Spring 36 only engages with valve block 28, and does not need as mentioned above to pass valve block 28 or be connected to valve block 28 by fastening piece, passes valve block 28 or is connected to the inefficacy that valve block 28 may cause sealing in time by fastening piece.

Among the embodiment shown in Figure 3, indication component 60 comprises tapped hole or the threaded insert 62 in the threaded bosses 64, indication support 66 and the bar assembly 67 that inserts on valve gap 24 tops, described bar assembly 67 comprises bar 68, it is remained in the threaded insert 62 by can pivot spherical member or ball 69, extending from described plug, and move with respect to described valve block 28 at both direction.When valve block 28 closures, the end 70 that bar 68 extends internally is kept near valve block 28 by extension spring 72.One end of spring 72 is connected to bar 68, and the opposite end keeps static with respect to valve body 12.Stretch out from valve gap the outward extending end of bar 68 74, and stop near the top 76 of indicator board 78, to show that valve block 28 is in " closure " position.When forming current 20 in pipeline, valve block 28 raises towards the top cover 24 of valve body 12.By contacting of the end 70 that extends internally at it and valve block 28, promote rising bar 68 successively.So bar 68 outward extending ends 74 pivot towards " opening " end 80 of plate 78 downwards.In bar 68 moving process, it keeps preventing translation by the ball 69 that is contained in the threaded insert 62.Ball 69 is near the rotation in indication plug 62 of

nonmetal sealing gasket

82,84, and the pressure integrity of maintenance valve body 12.

Mechanism is presented in the Figure 4 and 5 in detail.Plug 62 is formed with common conical pipeline screw thread 86, is used for simple assembled in situ.The top 88 of plug 62 has hexagonal shape, thereby can be used to the spanner installing stopper.The inside 90 of plug 62 has processing positioning seat 92, to admit for example teflon nonmetal sealing gaskets 84 such as (Teflon).Gag 94 has the processing positioning seat 96 that similarly is used for relative sealing gasket 82.Gag 94 also has the Hexagon top 96 for the assembling purpose.But the screw thread in the gag 94 98 is a straight thread, thus will cover 94 fastening, up to indicator board 78 press stall off 62 or by plug 62 near seizure.Simultaneously, on

nonmetal sealing gasket

82,84, provide mild compression, provide to close and close.Therefore the operation moment of torsion of indicating device is very low, because the diameter of ball 69 is selected very for a short time (7.3mmOD), provides little bonding area between the spherical surface of the spherical surface of ball 69 and sealing gasket 82,84.Low moment of torsion is necessary, so that do not disturb the operation of valve block 28.

Indicator board 78 is made by thin Corrosion Resistant Steel, so that forming process.Plate 78 has vertical support plate 100, so that the outer end 74 of bar 68 is enough far away apart from ball 69, to show motion in valve block 28 moving process.Top curved 102 in the plate 78 need be determined display unit 104 directions of plate 78 in vertical plane, so that the valve block position far just can be seen from valve body 12 from several yards.Plate 78 comprises the slit 106 through horizontal support plate 107, is used for the motion of guide rod 68.Because bar 68 passes valve by ball 69, so bar can rotate freely along any axis.Groove 106 need keep the relation between indicator board 78 and valve block 28 motions.

Mark 110,112, it can be the form that comprises the adhesive label 114 of capitalization " O " and " C ", pastes the reference that plate 78 provides " opening " and " closure " state.Capitalization " O " and " C " are with the miter angle orientation, so that it is shown as level in the mounting point, because about 45 degree of the plug of installing 62 inclinations.Label 114 is preferably formed by the monolithic with special cutting 116, with plate 78 on 45 degree chamferings 118 couplings, thereby the unidirectional only installation of label.Label 114 can be used color coding (redness=closure (regional 114a), green=as to open (regional 114b)), is suitable for watching at a distance.The plastic cap 120 of bright color also can be added on the outer end 74 of bar 68, so that the fair visibility of either direction to be provided.

Extension spring 72 is depended in the operation of indicating device, and it needs always with the valve block 28 of bar 68 maintenances near valve 10.Elastic force need overcome the frictional force between impact flow power on the bar and ball 69 and the nonmetal sealing gasket 82,84.Plate 78 comprises groove 122, is used to hold an end 124 of spring 72, and is used for keeping it static with respect to valve body 12.The other end 126 of spring 72 is through the hole 128 in the bar 68.

Bar 68 is through the cylindrical channel 130 of processing in the ball 69.Bar 68 is by compressed fit or by using the anaerobic immobilized compound to be fixed to ball 69.The inner 70 preferred processing of bar 68 have round nose, so that the rear surface of valve block 28 does not have to damage owing to the fricting movement that boom end repeats.

As shown in Figure 6, additional groove 132 is arranged in the vertical support plate 100, is used to connect L type support 134, and L type support 134 uses screw and nut 136 fixing.Limit switch 138 uses screw and nut 139 to be installed to support 134, and its vertical arm extends in the swing path of bar 68.When bar 68 arrives " closure " position, vertically arm 140 deflections, this starts electric switch 138.The switching position can be by regulating along groove 132 slip L brackets 134.The switch of other types and erecting device can be used for the position of test rod 68, except other mechanical switching devices, also comprise infrared, ultrasonic or other electromagnetism power spectrum or hall-effect switches.Described switch also can be provided for the open position of indicating valve, and perhaps two switches can be used for being provided for the unlike signal of open position and operating position.Can be used for the long distance vision or the audible indication of valve position by the suitable electrical signal of switching manipulation transmission, perhaps also can be used for according to FLOW CONTROL miscellaneous equipment through valve.

Though only propose some embodiments, other embodiments and various improvement will it will be apparent to those skilled in the art that by top description and comprise to be different from valve body and from the mode of screw thread on one's body plug being remained in the valve body; For example other fastening pieces can be used for plug is fixed to valve body, bar is formed rather than single-piece with two, bar or rod unit are with flat board or be different from shown cylindrical shape formation, use pressure spring or directly connect bar is fixed near valve block, utilize removable sealed member rather than ball, for example flexible diaphragm or elastomeric joint.These and other selections can be thought equivalent, and drop in the spirit and scope of the present invention.Position indicator can be used for having in the safety check that can move freely valve block, and perhaps its middle valve plate is biased in the safety check in the operating position by spring or other mechanisms.Position indicator also can be installed as original device in factory, if perhaps valve body is provided with when being used to hold the threaded bosses of threaded insert, can install at the scene, perhaps improves in mode described herein, to hold the plug with indicating arm.

Claims

1. safety check comprises:

Valve body with entrance and exit is formed with flow path between described entrance and exit,

It is characterized in that described safety check also comprises:

With the spring of described valve block towards described operating position biasing, described spring engages with valve block, described spring comprises near-end, this near-end extends around described hinge, and the described recess of contiguous engagement and do not pass described valve body, described spring also comprises far-end, and this far-end engages with described valve block, and described spring is not fixed to described valve body;

2. safety check according to claim 1 is characterized in that: described spring is arranged in the described valve body fully.

3. safety check according to claim 1 is characterized in that: described spring does not pass or the described valve block of process.

4. safety check according to claim 1 is characterized in that: described spring comprises the curved distal end that engages described valve block.

5. safety check according to claim 1 is characterized in that: described valve block comprises the near-end that is connected to described hinge and engages described valve body distally when described valve block is in the described operating position, engages the far-end of described valve body nearside in described valve block is shown in an open position the time;

The near-end of described valve block and described hinge keep static at described valve block in the pivot motion course between described open and close position.

6. safety check comprises:

It is characterized in that described safety check also comprises:

Be mounted and be used for transverse to described flow path and be pivotally connected to the hinge of the recess of described valve body, described be hinged be useful on will export the operating position of isolating from inlet and provide access and export between pivot movement valve block between the open position that is communicated with,

Indicating device comprises: be used to provide the exposed part of described valve block position vision indication, described exposed part extends in described valve body outside; Be connected to the mating part of described exposed part, described mating part are arranged on and are used to engage described valve block in the described valve body; Be used to provide the removable sealed member at the interface between described valve inner and the described valve body outside, described mating part and described exposed part are connected to described sealed member; With the mechanism that keeps described mating part to contact with described valve block.

7. safety check according to claim 6, it is characterized in that: described mating part and described exposed part comprise the bar with first end and second end, described first end engages with described valve block, described second end extends described valve body, described removable sealed member comprises the pivot ball of seizure in the threaded insert parts, described bar extends through described ball and catches in described ball, and described mechanism comprises that an end is connected to described bar and the opposite end keeps static spring with respect to described valve body.

8. safety check according to claim 6 is characterized in that: also comprise the indicator board that is installed on the described valve body.

9. safety check according to claim 6 is characterized in that: also comprise installing being used for moving to when determining the position electric switch by described exposed part startup when described valve block in described valve body.