CN205879480U - Gas table valve gap, valve seat seal nature detection device - Google Patents

Abstract

The utility model provides a gas table valve gap, valve seat seal nature detection device belongs to gas table detection auxiliary assembly field, including fixing device, exhaust apparatus, detection device, negative pressure pump and the drive arrangement who is used for installing the disk seat, drive arrangement's output shaft is used for the drive to connect the valve gap, orders about the valve gap and rotates for the disk seat, form sealing region between disk seat, valve gap and the fixing device, sealing region intercommunication exhaust apparatus's air inlet, detection device is connected to exhaust apparatus's gas outlet, and detection device connects the negative pressure pump, and detection device rotates according to the valve gap that the in -process is gaseous lets out the leakproofness that leakage quantity judges disk seat and valve gap. This detection device simple structure is reasonable, the manufacture of being convenient for, the convenient operation during use, can be accurate carry out developments to disk seat and valve gap and reveal flow measurement, the leakproofness result that obtains accords with the use standard of gas table more.

Description

Gas meter, flow meter valve gap, seat leakage detection device

Technical field

This utility model relates to gas meter, flow meter detection auxiliary device field, in particular to a kind of gas meter, flow meter valve gap, valve seat Device for detecting sealability.

Background technology

Current domestic gas meter, flow meter valve seat, valve bonnet seal detection have two kinds of methods.First method be test respectively valve seat, By indirectly testing, the flatness of valve gap and roughness, judge that sealing is the most qualified；Second method is that valve base sealing is fixed On pedestal, valve seat is placed valve gap, sealing when using detection of negative pressure valve seat valve gap static.

Inventor finds under study for action, and traditional valve seat, valve bonnet seal at least have a disadvantage in that during detecting

One, first method are disadvantageous in that detection flatness and roughness can only estimate that sealing can not be direct Detection leakage flow between valve seat, valve gap, detection accuracy is low；

Two, second method can only detect valve seat, valve gap leakage stream between valve seat, valve gap when being still in fixed position Amount, the scope being suitable for is little.

Utility model content

The purpose of this utility model is to provide a kind of gas meter valve gap, seat leakage detection device, and this detection device is tied Structure advantages of simple, it is simple to manufacture processing, easy to operate during use, it is possible to accurately valve seat and valve gap to be carried out dynamic leakage flow Detection, the sealing result obtained more conforms to the use standard of gas meter, flow meter.

Embodiment of the present utility model is achieved in that

Based on above-mentioned purpose, this utility model provides a kind of gas meter valve gap, seat leakage detection device, including for The fixing device of described valve seat, exhaust apparatus, detection device, negative pressure pump and driving means are installed, wherein:

The output shaft of described driving means, for valve gap described in drive connection, orders about described valve gap and turns relative to described valve seat Dynamic；Forming sealing area between described valve seat, described valve gap and described fixing device, described sealing area connects described aerofluxus dress The air inlet put, the gas outlet of described exhaust apparatus connects described detection device, and described negative pressure pump connects described detection device, institute State detection device and judge described valve seat and described valve gap according to the leakage rate of gas in sealing area in described valve gap rotation process Sealing.

In this utility model preferred embodiment, described fixing device includes base, axis and elastic sealing layer, institute Stating axis and be perpendicular to be installed on described base, described axis is used for installing described valve seat and described valve gap, described elastic sealing layer It is installed on described base.

In this utility model preferred embodiment, described elastic sealing layer is embedded in described base, and described elasticity is close The position fitted with described valve seat of sealing is respectively provided with fluted, the groove width of described groove less than corresponding described valve seat with The binding face of described elastic sealing layer, makes the notch of the described groove of described valve seat capping correspondence.

In this utility model preferred embodiment, described elastic sealing layer is set to silica gel sealing pad.

In this utility model preferred embodiment, described gas meter, flow meter valve gap also includes hold down gag, described hold down gag Being connected with described fixing device, described hold down gag is positioned at the top of described base, is used for described seat compression at described bullet On property sealant.

In this utility model preferred embodiment, described hold down gag includes cylinder assembly and pressure strip, described gas Cylinder component is installed on described fixing device, and the outfan drive connection of described cylinder assembly, in described pressure strip, orders about described pressure Tight plate is pressed on described valve seat, and described exhaust apparatus is installed on described pressure strip, with described pressure strip synchronizing moving.

In this utility model preferred embodiment, described fixing device also includes riser and installing plate, described riser Being perpendicular to be connected to described base, described installing plate is installed on the end away from described base of described riser, described installing plate Being parallel to described base, described cylinder assembly is installed on described installing plate.

In this utility model preferred embodiment, described pressure strip includes the first transverse slat, the second transverse slat and straight plate, institute Stating the first transverse slat and described second transverse slat be arranged in parallel, described straight plate is vertically connected at described first transverse slat and described second horizontal stroke Plate, and described first transverse slat and described second transverse slat be positioned at the both sides in plate face of described straight plate, described first transverse slat is slidably connected In described riser, and being parallel to described base, the glide direction of described first transverse slat is parallel to the axis direction of described axis, institute Stating the second transverse slat and be positioned at the top of described base, described exhaust apparatus is installed on described first transverse slat.

In this utility model preferred embodiment, described driving means is set to motor, and described motor is installed on described On second transverse slat, the output shaft of described motor is coaxially disposed with described axis.

In this utility model preferred embodiment, described gas meter detection device includes effusion meter, Pressure gauge, pressure regulator valve And PLC, described exhaust apparatus, described effusion meter, described Pressure gauge, described pressure regulator valve, described negative pressure pump are gone here and there successively Connection, described negative pressure pump, described driving means and described effusion meter are electrically connected described PLC.

This utility model embodiment provides the benefit that:

In sum, this utility model provides a kind of gas meter, flow meter valve gap, seat leakage detection device, this detection device Simple and reasonable, convenient processing and manufacture, easy to install and use, meanwhile, it is capable to respectively valve gap and valve seat are dynamically let out The detection of dew amount, i.e. uses standard valve seat as reference, it is possible to judge that valve gap is the most qualified, or uses standard valve gap as ginseng Examining, and then judge that valve seat is the most qualified, the sealing propertytest result obtained more conforms to the use standard of gas meter, flow meter, gas meter, flow meter Use more safe and reliable.Specific as follows:

This utility model embodiment provides a kind of gas meter, flow meter valve gap, seat leakage detection device, including fixing device, Exhaust apparatus, detection device and driving means.During use, valve seat is installed on the securing means, then, valve gap is installed on valve On seat, valve gap can rotate relative to valve seat, i.e. by driving means drive connection valve gap, drives valve gap to turn relative to valve seat Dynamic, and then when simulating gas meter, flow meter duty, relatively rotating of valve gap and valve seat.In order to detect valve seat and valve gap relative motion Time sealing, after valve seat is arranged on fixing device, between valve seat, valve gap and fixing device, define sealing area, the most fixing Device instead of the effect of the bellows of gas meter, flow meter, and valve seat will not leak gas with multiple link positions of fixing device, at valve seat and valve Lid is when relatively rotating, and valve seat and valve gap and link position do not fully seal, and has a certain amount of gas can be at sealing area and outer Circulate between portion, meanwhile, for the effect of negative pressure pump so that sealing area and outside exist draught head, when valve gap rotates, outward Portion's gas can be flowed in sealing area at the gap of valve gap and valve seat, and the gas being flowed in sealing area is filled by aerofluxus Putting and be delivered to detect device, utilize detection device to detect average leaked amount and maximum leakage amount, detection device can be according to flat All numerical value of leakage rate and maximum leakage amount judges that sealing is the most qualified, so complete dynamic under valve gap and valve seat close The detection of envelope property, due to the functional structure of negative pressure pump, it is possible to ensure that gas flows into negative pressure pump after flowing at detection device, Both completed the measurement of the amount of flow of gas, ensure that sealing area was in negative pressure state all the time simultaneously.Whole detection process is grasped Make simple and convenient, and the result that detection obtains is accurately and reliably, improves safety in utilization and the metering accuracy of gas meter, flow meter.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, will use required in embodiment below Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiment of the present utility model, the most should be by Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, also may be used To obtain other relevant accompanying drawings according to these accompanying drawings.

Fig. 1 is the gas meter, flow meter valve gap of this utility model embodiment, axonometric drawing (the not shown inspection of seat leakage detection device Survey device and negative pressure pump)；

Fig. 2 is this utility model embodiment gas meter, flow meter valve gap, the sectional view of seat leakage detection device；

Fig. 3 is the shaft side figure of this utility model embodiment fixing device；

Fig. 4 is the schematic diagram of this utility model embodiment base；

Fig. 5 is the schematic diagram of this utility model embodiment elastic sealing layer；

Fig. 6 is the schematic diagram of this utility model embodiment pressure strip；

Fig. 7 is the signal of this utility model embodiment driving means；

Fig. 8 is the structural representation of this utility model embodiment valve gap.

In figure:

Fixing device 100, base 110, depressed part 111, elastic sealing layer 120, groove 121, axis 130, riser 140, Installing plate 150,

Exhaust apparatus 200, detection device 300, negative pressure pump 400,

Driving means 500, of bonding tooth 510,

Hold down gag 600, cylinder assembly 610, pressure strip 620, the first transverse slat 621, the second transverse slat 622, straight plate 623,

Valve gap 700, keyway 710, valve seat 800.

Detailed description of the invention

At present, the range of gas meter, flow meter is wide, for the wanting of sealing of valve gap during the use of gas meter, flow meter and valve seat Ask more and more higher, both ensured the normal work of gas meter, flow meter, added safety and accuracy simultaneously.And traditional detection valve seat and During the sealing of valve gap, use two kinds of methods, a kind of method by the plane of test valve seat and valve gap respectively and between roughness Connect and judge that sealing is the most qualified, it is impossible to the flow that directly detection is revealed, the accuracy of detection is low；Another kind of method uses negative pressure Sealing when detection valve seat valve gap is static, applicable scope is little, it is impossible to obtain the valve gap under gas meter, flow meter duty and valve seat Sealing.

In consideration of it, designer of the present utility model devises a kind of gas meter, flow meter valve seat, valve bonnet seal detection device, its knot Structure advantages of simple, it is possible to the valve gap under detection dynamically and the sealing of valve seat, the parameter obtained is more reasonable, the use of gas meter, flow meter More safe and reliable.

For making the purpose of this utility model embodiment, technical scheme and advantage clearer, new below in conjunction with this practicality Accompanying drawing in type embodiment, is clearly and completely described the technical scheme in this utility model embodiment, it is clear that retouched The embodiment stated is a part of embodiment of this utility model rather than whole embodiments.Generally described in the accompanying drawing herein and The assembly of this utility model embodiment illustrated can be arranged with various different configurations and design.

Therefore, below the detailed description of the embodiment of the present utility model provided in the accompanying drawings is not intended to limit requirement The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in this utility model Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, all Belong to the scope of this utility model protection.

It should also be noted that similar label and letter represent similar terms, therefore, the most a certain Xiang Yi in following accompanying drawing Individual accompanying drawing is defined, then need not it be defined further and explains in accompanying drawing subsequently.

In description of the present utility model, it should be noted that term " on ", " vertically ", " level ", " interior ", " outward " etc. Orientation or the position relationship of instruction are based on orientation shown in the drawings or position relationship, or when this utility model product uses The orientation usually put or position relationship, be for only for ease of description this utility model and simplify description rather than instruction or dark The device or the element that show indication must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that right Restriction of the present utility model.Describe additionally, term " first ", " second " etc. are only used for distinguishing, and it is not intended that indicate or dark Show relative importance.

Additionally, the term such as term " level ", " vertically " is not offered as requiring parts abswolute level or pendency, but can be slightly Low dip.As " level " only refers to for its direction relatively " vertically " more level, it is not that this structure of expression must be complete Full level, but can be slightly tilted.

In description of the present utility model, in addition it is also necessary to explanation, unless otherwise clearly defined and limited, term " sets Put ", should be interpreted broadly " installation ", " being connected ", " connection ", connect for example, it may be fixing, it is also possible to be to removably connect, Or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to pass through intermediary It is indirectly connected to, can be the connection of two element internals.For the ordinary skill in the art, can manage with concrete condition Solve above-mentioned term concrete meaning in this utility model.

It should be noted that in the case of not conflicting, the embodiment in this utility model and the feature in embodiment can To be mutually combined.

Embodiment

Refer to Fig. 1 and Fig. 2, present embodiments provide a kind of gas meter, flow meter valve gap 700, valve seat 800 device for detecting sealability 300, whether valve seat 800 and the sealing of valve gap 700 under detecting dynamically meet use requirement, and the parameter obtained is more accurate Really, result is relatively reliable, substantially increases the range of gas meter, flow meter and adds the accuracy of safety, metering.Gas meter, flow meter Valve seat 800, valve gap 700 device for detecting sealability 300 include fixing device 100, exhaust apparatus 200, detection device 300, compress Device 600, negative pressure pump 400 and driving means 500.

Refer to Fig. 3, after fixing device 100 is used for installing valve seat 800 and valve gap 700, valve seat 800 and valve gap 700 installation, Can simulate use state lower valve base 800 and the relative motion of valve gap 700 of gas meter, flow meter, concrete, fixing device 100 includes the end Seat 110, axis 130, elastic sealing layer 120 and installing rack.

Referring to Fig. 4, base 110 is preferably arranged to rectangular slab, its size and the on-demand setting of material, can be according to different The shape size of the valve seat 800 of gas meter, flow meter is determined, and adds man-hour flexible and changeable, it is possible to meet the use need under varying environment Ask.The base 110 of rectangular slab is easy to process, and symmetry is good, it is simple to the installation of valve seat 800.Base 110 includes two be oppositely arranged Individual plate face, two plate faces are plane, and base 110 is placed on horizontally disposed operating board or is directly placed on horizontal plane, Fitting with horizontal plane in one plate face, makes base 110 substantially be the level of state, it is simple to the installation of valve seat 800, and is easy to simulate valve seat 800 and the relative motion of valve gap 700.Another plate face of base 110 is provided with depressed part 111, and the position of depressed part 111 is on-demand to be set Putting, meet the installation of the valve seat 800 of different size and shape, the position of valve seat 800 is easy to determine, easier for installation.

Axis 130 is the axle that valve gap 700 rotates around valve seat 800, and it is cylindrical shape, and axis 130 is arranged on base 110 On, axis 130 can all use metal material to make with base 110, then fixing connection, sound construction by the way of welding Reliably, easy to process.Axis 130 is arranged on the on-demand setting in position of base 110, it is simple to the installation of valve seat 800, and is easy to valve The rotation of lid 700.

Refer to Fig. 3, in order to simulate valve seat 800 and the duty of valve gap 700, need to ensure valve seat 800 and base 110 Between sealing, after i.e. valve seat 800 is arranged on base 110, the contact position of valve seat 800 and base 110 needs to seal Process so that form sealing area between valve gap 700, valve seat 800 and base 110, do not have the situation of gas leakage, do not interfere with The result of test.In the preferred version of the present embodiment, arranging elastic sealing layer 120 on base 110, elastic sealing layer 120 is embedding It is located in base 110, easy for installation, it is difficult to because of deformed damaged, service life is long, will be arranged on base by elastic sealing layer 120 In the depressed part 111 of 110, the position that base 110 contacts with valve seat 800 is provided with depressed part 111, each depressed part 111 Inside it is both provided with elastic sealing layer 120, good sealing effect.Elastic sealing layer 120 preferably employs silica gel sealing pad and makes, and seals effect Fruit more preferably, and is easy to machine-shaping, and service life is long.

Refer to Fig. 5, further, in order to improve the sealing between base 110 and valve seat 800, this embodiment excellent Selecting in scheme, arrange groove 121 on silica gel sealing pad, valve seat 800 has multiple with the contact position of base 110, each contact Position is all tightly connected by silica gel sealing pad, and the position that silica gel sealing pad contacts with valve seat 800 is respectively arranged with recessed Groove 121, the length direction of groove 121 is consistent with the contour line of valve seat 800 and the contact position of base 110, it is ensured that valve seat 800 with The sealing of the contact position of silica gel sealing pad.Meanwhile, the groove width of groove 121 is less than the patch with silica gel sealing pad of valve seat 800 The width in conjunction face, it is ensured that on the notch of the groove 121 that valve seat 800 is sealed on correspondence, between valve seat 800 and corresponding groove 121 Form airtight chamber, time actually used, press valve seat 800 so that valve seat 800 moves towards silica gel sealing pad, silica gel sealing Pad deforms upon, and the gas in groove 121 is extruded, and i.e. defines pressure reduction between valve seat 800 and silica gel sealing pad, will be by pressure After unclamping, silica gel sealing pad recovers deformation, and valve seat 800 is adsorbed on base 110 by silica gel sealing pad, fixing of valve seat 800 Solid and reliable, and the good airproof performance of entirety, it is ensured that during detection, not leakiness at valve seat 800 and the link position of base 110 Gas, improves the accuracy of detection.

Referring to Fig. 3, installing rack is used for installing hold down gag 600, is preferably arranged to, and installing rack includes riser 140 and peace Filling plate 150, riser 140 and installing plate 150 are rectangular plate-like structure, and processing is with easily manufactured, and riser 140 is perpendicular to base 110 are arranged, i.e. riser 140 is vertically arranged, and riser 140 is preferably provided at the one side of base 110, and along being perpendicular to base A plate face of base 110 is protruded in the direction, plate face of 110, and riser 140 and installing plate 150 vertically connect, and installing plate 150 is parallel to the end Seat 110, base 110 and installing plate 150 are positioned at the same side of riser 140.

Valve seat 800 is pressed on base 110 by hold down gag 600, valve seat 800 and the better tightness of base 110, with Time, exhaust apparatus 200 can be pressed on valve seat 800 by hold down gag 600 so that the air vent of valve seat 800 and exhaust apparatus 200 are tightly connected.

Referring to Fig. 2, concrete, hold down gag 600 is positioned at the top of base 110, namely is positioned at valve seat 800 and valve gap The top of 700, it includes cylinder assembly 610 and pressure strip 620, and cylinder assembly 610 is arranged on the installing plate 150 of installing rack, The output shaft drive connection pressure strip 620 of cylinder assembly 610, orders about pressure strip 620 past along the axis direction being parallel to axis 130 Multiple mobile, pressure strip 620 is pressed on valve seat 800 in moving process so that valve seat 800 is pressed on elastic sealing layer 120.

Referring to Fig. 6, further, pressure strip 620 includes first transverse slat the 621, second transverse slat 622 and straight plate 623, the One transverse slat the 621, second transverse slat 622 and straight plate 623 are disposed as rectangular slab, it is clear that its shape is not unique, on-demand setting, Process more flexible.First transverse slat 621 and the second transverse slat 622 be arranged in parallel, and straight plate 623 is vertically connected at the first transverse slat 621 He Second transverse slat 622, and the first transverse slat 621 and the second transverse slat 622 be positioned at the both sides in plate face of straight plate 623, the first transverse slat 621 slides Being connected to riser 140, and be parallel to base 110, the glide direction of the first transverse slat 621 is parallel to the axis direction of axis 130, the Two transverse slats 622 are positioned at the top of base 110, and exhaust apparatus 200 is installed on the first transverse slat 621.

Further, the first transverse slat 621 is set in outside riser 140, and riser 140 and the first transverse slat 621 define guide rail, lead The structure of set, the first transverse slat 621 slides along the length direction of riser 140, and riser 140 has guide effect, whole pressure strip 620 slide more steadily reliably.Exhaust apparatus 200 is set to exhaustor, and the axis of exhaustor is parallel to axis 130 and arranges, just Connecting in the air vent with valve seat 800, and be provided with sealing member between exhaustor and valve seat 800, cylinder assembly 610 drives and compresses When plate 620 is pressed on valve seat 800 downwards, the first transverse slat 621 contacts with valve seat 800, the air vent of exhaustor connection valve seat 800, Sealing member plays sealing function, it is ensured that exhaustor and the sealing of valve seat 800, is difficult to gas leakage.

Negative pressure pump 400 is prior art, for improve its 26S Proteasome Structure and Function in the present embodiment, in order to avoid narration weight Multiple burden, here, be not described in detail.Negative pressure pump 400 connects with the steam vent of valve seat 800, concrete, and negative pressure pump 400 leads to Cross exhaustor to connect with steam vent so that produce negative pressure in the sealing area that valve seat 800, valve gap 700 and base 110 are formed, make Body of bringing about the desired sensation can be externally entering in sealing area, carries out the detection of leakage rate.Negative pressure pump 400 preferably employs vacuum pump.

Being also associated with detecting device 300 between negative pressure pump 400 and exhaustor, detection device 300 is for the stream of detected gas Momentum, concrete, detection device 300 includes effusion meter, Pressure gauge, pressure regulator valve and PLC, exhaustor, effusion meter, pressure Power table, pressure regulator valve are sequentially connected with, and gas is when exhaust pipe flow, and through effusion meter, effusion meter carries out record to the flow of gas, And average leaked amount and maximum leakage amount can be obtained, meanwhile, negative pressure pump 400, driving means 500 and effusion meter are electrically connected PLC, the numerical value of the leakage rate that PLC exports according to effusion meter judges that sealing is the most qualified, and PLC is also The rotating speed of driving means 500, and then the velocity of rotation of application valve cover 700 can be controlled.When practical operation, by pressure regulator valve pair Air pressure in loop is adjusted, and then is easy to measure the sealing between different pressures state bottom flange 700 and valve seat 800 Can, obtain result more accurately.

Refer to Fig. 7 and Fig. 8, driving means 500 drive connection valve gap 700, drive valve gap 700 relative to valve seat 800 turns Dynamic, driving means 500 is preferably arranged to motor, valve seat 800 and valve gap 700 and is all arranged on axis 130, on the output shaft of motor Being provided with of bonding tooth 510, this of bonding tooth 510 coordinates with the keyway 710 on valve gap 700, electric machine rotation, drive valve gap 700 around Axis 130 rotates, and then simulates the duty of gas meter, flow meter.

Whole apparatus structure advantages of simple, by valve seat 800 is arranged on base 110, valve seat 800 and base 110 it Between be tightly connected by silica gel sealing pad, valve seat 800 and valve gap 700 are positioned by the axis 130 being arranged on base 110, valve Cover 700, between base 110 and valve seat 800, define sealing area, and valve seat 800 is adsorbed at base 110 by silica gel sealing pad On, solid and reliable；Driving means 500 drive connection valve gap 700, drives valve gap 700 to rotate around axis 130, and then simulates The duty of gas meter, flow meter.Sealing area connects with the steam vent of valve seat 800, and steam vent is further through exhaustor and detection device 300, vacuum pump connection, vacuum pump makes sealing area produce negative pressure, and in valve gap 700 rotation process, extraneous gas passes through valve Gap between lid 700 and valve seat 800 enters in sealing area, then flows through detection device 300, it is achieved that the meter of leakage rate Amount.Detect the valve gap 700 under device 300 is judged dynamically and the sealing of valve seat 800 by the numerical value of its leakage rate recorded Property the most qualified, i.e. use standard valve seat 800 as reference, it is possible to judge that valve gap 700 is the most qualified, or employing standard valve gap 700 as reference, and then judges that valve seat 800 is the most qualified.This detection device 300 can be respectively to valve seat 800 and valve gap 700 Carry out dynamic leakage flow detection, also can carry out dynamic leakage flow detection in pairs to specifying valve seat 800, valve gap 700.

The foregoing is only preferred embodiment of the present utility model, be not limited to this utility model, for this For the technical staff in field, this utility model can have various modifications and variations.All in spirit of the present utility model and principle Within, any modification, equivalent substitution and improvement etc. made, within should be included in protection domain of the present utility model.

Claims (10)

1. a gas meter, flow meter valve gap, seat leakage detection device, it is characterised in that include for installing the fixing of described valve seat Device, exhaust apparatus, detection device, negative pressure pump and driving means, wherein:

The output shaft of described driving means, for valve gap described in drive connection, orders about described valve gap and rotates relative to described valve seat； Forming sealing area between described valve seat, described valve gap and described fixing device, described sealing area connects described exhaust apparatus Air inlet, the gas outlet of described exhaust apparatus connects described detection device, and described detection device connects described negative pressure pump, described Detection device judges described valve seat and the sealing of described valve gap according to the leakage rate of gas in described valve gap rotation process.

Gas meter, flow meter valve gap the most according to claim 1, seat leakage detection device, it is characterised in that described fixing dress Putting and include that base, axis and elastic sealing layer, described axis are perpendicular to be installed on described base, described axis is used for installing institute Stating valve seat and described valve gap, described elastic sealing layer is installed on described base.

Gas meter, flow meter valve gap the most according to claim 2, seat leakage detection device, it is characterised in that described elasticity is close Sealing is embedded in described base, and the position fitted with described valve seat of described elastic sealing layer is respectively provided with fluted, institute State the groove width binding face less than corresponding described valve seat with described elastic sealing layer of groove, make the institute that the capping of described valve seat is corresponding State the notch of groove.

Gas meter, flow meter valve gap the most according to claim 2, seat leakage detection device, it is characterised in that described elasticity is close Sealing is set to silica gel sealing pad.

5. according to the gas meter, flow meter valve gap described in any one of claim 2-4, seat leakage detection device, it is characterised in that institute Stating gas meter, flow meter valve gap and also include that hold down gag, described hold down gag are connected with described fixing device, described hold down gag is positioned at institute State the top of base, be used for described seat compression at described elastic sealing layer.

Gas meter, flow meter valve gap the most according to claim 5, seat leakage detection device, it is characterised in that described compression fills Put and include that cylinder assembly and pressure strip, described cylinder assembly are installed on described fixing device, the outfan of described cylinder assembly Drive connection, in described pressure strip, is ordered about described pressure strip and is pressed on described valve seat, and described exhaust apparatus is installed on described pressure Tight plate, with described pressure strip synchronizing moving.

Gas meter, flow meter valve gap the most according to claim 6, seat leakage detection device, it is characterised in that described fixing dress Putting and also include riser and installing plate, described riser is perpendicular to be connected to described base, and described installing plate is installed on described riser The end away from described base, described installing plate is parallel to described base, and described cylinder assembly is installed on described installing plate.

Gas meter, flow meter valve gap the most according to claim 7, seat leakage detection device, it is characterised in that described pressure strip Including the first transverse slat, the second transverse slat and straight plate, described first transverse slat and described second transverse slat be arranged in parallel, and described straight plate is vertical It is connected to described first transverse slat and described second transverse slat, and described first transverse slat and described second transverse slat are positioned at the plate of described straight plate The both sides in face, described first transverse slat is slidably connected to described riser, and is parallel to described base, the slip side of described first transverse slat To being parallel to the axis direction of described axis, described second transverse slat is positioned at the top of described base, and described exhaust apparatus is installed on Described first transverse slat.

Gas meter, flow meter valve gap the most according to claim 8, seat leakage detection device, it is characterised in that described driving fills Installing and be set to motor, described motor is installed on described second transverse slat, and the output shaft of described motor is coaxially disposed with described axis.

Gas meter, flow meter valve gap the most according to claim 8, seat leakage detection device, it is characterised in that described gas meter, flow meter Detection device includes effusion meter, Pressure gauge, pressure regulator valve and PLC, described exhaust apparatus, described effusion meter, described pressure Power table, described pressure regulator valve, described negative pressure pump are sequentially connected in series, and described negative pressure pump, described driving means and described effusion meter are respectively Electrically connect described PLC.