CN102759384A - Gas roots type flow meter - Google Patents
Gas roots type flow meter Download PDFInfo
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- CN102759384A CN102759384A CN2012102033091A CN201210203309A CN102759384A CN 102759384 A CN102759384 A CN 102759384A CN 2012102033091 A CN2012102033091 A CN 2012102033091A CN 201210203309 A CN201210203309 A CN 201210203309A CN 102759384 A CN102759384 A CN 102759384A
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Abstract
The invention relates to a gas roots type flow meter with functions of alarm and bypass. The flow meter comprises a differential pressure base, a signal trigger mechanism and a flow meter body, wherein two ends of a cut-through channel are respectively provided with a waist wheel, the differential pressure base is communicated with an air inlet end through a conduit, the differential pressure base is internally provided with an elastic leather membrane, the differential pressure base is connected with a universal driving shaft fixed with the leather membrane, the universal driving shaft is hinged with an elastic pinch plate of which one end is provided with a hook angle, the cut-through channel is internally provided with a valve seat, a valve rod is arranged on the valve seat, a restoring spring is connected between the valve rod and the valve seat, a valve clack is fixedly arranged on the valve rod, the valve clack is connected with a hook angle of the elastic pinch plate in a clamping way, the signal trigger mechanism comprises a magnetic steel support column, and the magnetic steel support column leans against one end of the valve rod which is far away from the valve clack. The gas roots type flow meter has the benefit effects that 1. after the flow meter has fault, a bypass device starts, and gas directly passes through the cut-through channel, so that the gas supply of upstream gas equipment can be guaranteed within a short time; and 2. the valve rod is separated from the magnetic steel support column, so that the signal trigger mechanism transmits a signal so as to promote workers to maintain the flow meter.
Description
Technical field
The present invention relates to a kind of flow instrument, especially relate to a kind of gas Roots type flowmeter with warning and bypass function.
Background technology
The gas Roots type flowmeter is a kind of volumetric flow metering instrument of accurate measurement gas flow; Have precision height, good reliability, in light weight, characteristics such as the life-span is long, running noises is low; Be suitable for measuring noncorrosive gases such as rock gas, town gas, propane, nitrogen, industrial inertia gas, be widely used in the commercial clearing of combustion gas of industries such as food and drink, hotel, the transmission and distribution network gas metering; The metering of combustion gas voltage regulating station, gas meterings such as industry and civil boiler.
The principle of work of gas Roots type flowmeter is following: when gas passes through flowmeter; Produce pressure reduction at inlet end and outlet side; Act on high-accuracy synchromesh gear be linked together two waists wheel on, thereby drive the rotation of two waists wheel, form confined space between two during this period waists wheels and flowmeter shell inwall and the gland; Come periodic inflation and exhaust; The revolution of two waist wheels is directly proportional with the gas volume amount through flowmeter, and the rotation of two waist wheels passes to mechanical counter through magnetic coupler, and the volume of measurement chamber is to realize the purpose of metering thereby accumulative total is flowed through.
In the normal use of gas Roots type flowmeter, the waist wheel runs well, and the gas loss amount between the Roots type flowmeter entrance end is very little, and gas flows directly into downstream user with pipeline.But when waist wheel is installed improper or because booty when stuck; Gas can not smooth and easyly be discharged through the outlet side; It is big that pressure reduction between the Roots type flowmeter entrance end becomes, and gas condenses upon the inlet end of gas Roots type flowmeter gradually, like untimely processing; Can influence the gas just commonly used of flowmeter downstream gas-fired equipment, and can cause flowmeter to damage.
A kind of flowmeter is provided at present, like notification number is: a kind of point contact type warning suspended body flowmeter that the Chinese utility model patent of CN87212150U provides is applicable to the flow measurement of non-conductive solution and gas; It endpiece above the tapered tube with below entrance point and the corresponding a certain scale of alarm setting value place, be provided with at least one group of electric contact, when flow reaches and exceeds upper limit alarming value; When being lower than the next limit alarming value; Float contacts with electric contact, by the alert circuit of circular, sends alerting signal.The float of this patent contacts with electric contact under gas pressure, realize reporting to the police, and under gas pressure, float receives disturbing factor many, and movable poor stability, reliable inadequately, the problem that occurs false alarm easily even can not report to the police.
Summary of the invention
The present invention mainly is to the existing not accurate enough problem of the existing alarm decision of alarm flowmeter, a kind of accuracy height of reporting to the police is provided, stops up the gas Roots type flowmeter that gas can be discharged from bypass.
Above-mentioned technical matters of the present invention mainly is able to solve through following technical proposals: a kind of gas Roots type flowmeter comprise flowmeter bodies, but flowmeter bodies is provided with the put-through channel that supplied gas is passed through; The two ends of put-through channel are provided with the waist wheel, also comprise the pressure reduction seat and the signal trigger mechanism that are arranged on the flowmeter bodies, and the pressure reduction seat is communicated with the inlet end of put-through channel through conduit; Be provided with the elasticity epithelium that forms seal point in the pressure reduction seat, be connected with movably universal driving shaft on the pressure reduction seat, universal driving shaft is fixedly connected with epithelium; Be hinged with the elastic force buckle at an end buckle angle on the universal driving shaft; Be provided with valve seat in the put-through channel, valve seat is provided with the valve rod that can move along put-through channel, is connected with back-moving spring between valve rod and the valve seat; Be installed with flap on the valve rod; The cheicers clamping of flap and elastic force buckle, signal trigger mechanism comprise movably magnet steel pillar, and the magnet steel pillar is resisted against on the valve rod end away from flap.When the gas Roots type flowmeter normally used, valve rod one end was held the magnet steel pillar, and signal trigger mechanism can not react; Install improper or because booty when stuck, the gaseous tension of inlet end increases when waist wheel, gas can get into the pressure reduction seat along conduit; And the epithelium in the pressure reduction seat produced downforce, when downforce during, will move downward in the middle part of the epithelium greater than the elastic deformation force of epithelium itself; And drive universal driving shaft and together descend, the elastic force buckle is movable, and flap separates with the elastic force buckle; Then valve rod moves under the acting force of back-moving spring, and the magnet steel pillar separates with valve rod and moves down, and signal trigger mechanism reacts thereupon; Signal trigger mechanism transmits to remote control terminal, reminds this gas Roots type flowmeter of operating personnel to break down, and in time notifies gas company that flowmeter is safeguarded.Valve seat, flap, valve rod and back-moving spring are by-pass collar of the present invention; By-pass collar is opened; Be that flap moves to the put-through channel outlet side, form less gas passage between flap and the put-through channel, gas can be discharged through this passage; Guarantee the air feed demand of downstream gas-fired equipment in short time, this time period can supply operating personnel to remove to safeguard the gas Roots type flowmeter.
As preferably, described signal trigger mechanism comprises sensor holder, is provided with tongue tube in the sensor holder; The bottom of sensor holder is provided with screwed union; Being axially arranged with of screwed union extends to the pillar hole of tongue tube below, and said magnet steel pillar is positioned at pillar hole and is slidingly connected with screwed union, and the upper end of magnet steel pillar is provided with magnet; Be connected with the magnetosensitive signal wire on the tongue tube; The magnetosensitive signal wire is connected with remote control terminal through radio, and the bottom of magnet steel pillar is with overcoat, and bottom one side of overcoat is provided with the valve rod hole that can supply valve rod to pass.Be set on outward in the pipeline of flowmeter shell and overcoat coupling, sensor holder is positioned at the top of pipeline, and valve rod can move under the flap effect.When unusual condition appearred in flowmeter, flap separated with the elastic force buckle, and valve rod withdraws from overcoat under the acting force of back-moving spring; Do the movement of falling object in the magnet steel pillar its external sleeve; The magnet of magnet steel pillar top is away from tongue tube, two reeds in the tongue tube since magnet away from becoming separated position by closure state, the variation of reed state transmits to remote control terminal the magnetosensitive signal wire; Remote control terminal receives signal and learns that unusual condition appears in flowmeter, so far accomplishes alarm procedure.
As preferably, described sensor holder surface is provided with oil fill plug, and the port place of overcoat is with hold-down ring, is provided with adhesive layer between tongue tube and magnetosensitive signal wire and the sensor holder.Oil fill plug is transparence, and operating personnel can observe magnet steel pillar and the situation of magnet in sensor holder through oil fill plug; Hold-down ring makes outer being enclosed within the installation process, and after the valve rod hole of overcoat was aimed at valve rod, hold-down ring was fixed through screw thread and overcoat, and overcoat and flowmeter pipeline inwall are fixed; Adhesive layer has improved sealing, makes the position of magnetosensitive signal wire comparatively fixing simultaneously.
As preferably, described pressure reduction seat comprises epithelium loam cake and epithelium lower cover, is covered with the sealing ring with epithelium lower cover butt on the epithelium, and the epithelium edge is embedded with O-ring seal between sealing ring side and the epithelium lower cover between sealing ring and epithelium lower cover.After being covered with the sealing ring with epithelium lower cover butt on the epithelium, the contact area of epithelium loam cake and epithelium lower cover increases, and the sealing property between epithelium loam cake and the epithelium lower cover improves, and epithelium more is prone to make pressure reduction seat upper-lower seal, and gas is difficult for revealing; O-ring seal has further improved the sealing between epithelium loam cake and the epithelium lower cover.
As preferably, be bolted with two nuts on the universal driving shaft, be provided with top board and lower platen between two nuts; The lower platen middle part is provided with boss; Top board is provided with the groove adaptive with boss, top board and lower platen clamping, epithelium be socketed on the boss and epithelium between top board and lower platen.Top board, epithelium and lower platen are fixed together, and have strengthened the epithelium anti-pressure ability, increase the service life, and the fixing safety of epithelium and universal driving shaft is firm in addition; Top board and lower platen are connected together, and accurate positioning is reliable, are difficult for becoming flexible, and epithelium is safe and reliable.
As preferably, it is prominent that the outer edge of described epithelium extends to form the location downwards, covers under the epithelium to be provided with to hold the prominent locating slot in location, and the epithelium middle part raises up and forms annular pressure ring, and pressure ring is between dashing forward in top board and location.Location on the epithelium is prominent to be inserted in the locating slot, and the epithelium fixation be difficult for throwing off, and sealing property improves; Pressure ring raises up, and the downward pressure direction of protrusion direction and air-flow is opposite, and epithelium more is prone to elastic deformation takes place under the effect of stream pressure, and reaction sensitivity is high.
As preferably, described epithelium loam cake is fixedly connected with the epithelium lower cover through set bolt, is installed with below the epithelium loam cake and places restrictions on piece, places restrictions on piece and aims at top board.The epithelium loam cake is fixed through bolt and epithelium lower cover, technology maturation, fixation; After epithelium middle part moved downward, when epithelium top air pressure reduced or disappears, epithelium rebounded under the effect of self elastic force; The epithelium middle part moves upward, if the bounce-back amount of exercise is excessive, epithelium collides the epithelium loam cake easily; Epithelium damages easily, places restrictions on piece and aims at top board so on epithelium, cover to be provided with, and places restrictions on piece and at first touches top board; Be used to slow down the reaction force of epithelium, prolong its serviceable life.
As preferably, the valve seat bottom is provided with and can holds the pilot hole that valve rod passes, and valve rod and valve seat are slidingly connected, and back-moving spring is set on the valve rod, and butt, the other end and flap butt bottom an end of back-moving spring and the valve seat.Valve seat is fixed in the put-through channel of flowmeter, and valve rod passes pilot hole and valve seat slip relatively, and after flap and the disconnection of elastic force buckle, valve rod can move under the effect of back-moving spring.
As preferably, be provided with T-valve between described pressure reduction seat and the conduit, a valve port of T-valve is connected with conduit; A valve port is connected with the pressure reduction seat; Remain a valve port and be provided with big footpath section, big footpath section is provided with sealed steel ball with the junction of valve port, also is provided with compression spring in the section of big footpath; One end of compression spring and steel ball against, the other end is connected on the section external port of big footpath.After the flowmeter inlet end stopped up, gas got into T-valve from conduit, gets in the pressure reduction seat again; Epithelium is produced pressure, and the big footpath section on the another one valve port is bigger than the bore of this valve port self, when gas fully gets into the pressure reduction seat; When the epithelium middle part moved downward to extreme position, air pressure continued increase and will cause epithelium damaged, so in the section of big footpath, be provided with compression spring and steel ball; Too much assemble gas promotion steel ball and move, gas can avoid the gas Roots type flowmeter to damage through the section discharge of big footpath.
Therefore; The invention has the beneficial effects as follows: 1, when flowmeter breaks down, through the by-pass collar of opening, gas directly flows through the flowmeter bodies put-through channel; Guarantee the air feed of downstream gas-fired equipment in short time, is provided the time for operating personnel safeguard the gas Roots type flowmeter; 2, after Roots type flowmeter broke down, gas got into the pressure reduction seat and makes the motion of epithelium middle part, and valve rod is separated with the magnet steel pillar, and signal trigger mechanism sends to report to the police informs the associative operation personnel, so that keep in repair, reports to the police accurately good stability; 3, be provided with T-valve between pressure reduction seat and the conduit, the gas of too much assembling can be discharged through T-valve, avoids the gas Roots type flowmeter to damage.
Description of drawings
Accompanying drawing 1 is a kind of perspective view of the present invention;
Accompanying drawing 2 is a kind of synoptic diagram under the normal operating condition of the present invention;
Accompanying drawing 3 is after the present invention breaks down, a kind of synoptic diagram of alarm activation;
Shown in the figure: the 1-flowmeter bodies; The 2-put-through channel; 3-pressure reduction seat; The 4-signal trigger mechanism; The 5-conduit; The 6-epithelium; The 7-universal driving shaft; 8-elastic force buckle; The 9-valve seat; The 10-valve rod; The 11-back-moving spring; The 12-flap; 13-magnet steel pillar; The 14-sensor holder; The 15-tongue tube; The 16-screwed union; 17-magnet; 18-magnetosensitive signal wire; The 19-overcoat; The 20-pillar hole; The 21-oil fill plug; The 22-sealing ring; The 23-top board; The 24-lower platen; The 25-location is prominent; The 26-pressure ring; 27-places restrictions on piece; The 28-T-valve; The 29-steel ball; The 30-compression spring; The 31-pilot hole; 32-epithelium loam cake; 33-epithelium lower cover; The 34-hold-down ring; The 35-compression fittings.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.
Embodiment:
Shown in Figure of description 1, a kind of gas Roots type flowmeter comprises flowmeter bodies 1 and is arranged on pressure reduction seat 3, the signal trigger mechanism 4 on the flow element body 1; But flowmeter bodies 1 is provided with the put-through channel 2 that supplied gas is passed through, and the two ends of put-through channel 2 are provided with two waist wheels, and the upper end snail of pressure reduction seat 3 is connected to the compression fittings 35 of connection; Shown in Figure of description 6, the top of compression fittings 35 is provided with T-valve 28, and compression fittings 35 is fixed through nut with a valve port of T-valve 28; Another valve port of T-valve 28 is connected with conduit 5; Conduit 5 extends to the air inlet port of put-through channel 2, and conduit 5 is fixed through nut with the valve port of corresponding T-valve 28, and T-valve 28 remaining valve ports are provided with big footpath section; Big footpath section is provided with sealed steel ball 29 with the junction of valve port; Also be provided with compression spring 30 in the section of big footpath, an end of compression spring 30 and steel ball 29 against, the other end is connected on the section external port of big footpath; Shown in Figure of description 4, pressure reduction seat 3 comprises epithelium loam cake 32, epithelium lower cover 33, top board 23 and lower platen 24, is provided with epithelium 6 and universal driving shaft 7 in the pressure reduction seat 3; Epithelium loam cake 32, epithelium lower cover 33, epithelium 6, top board 23 and lower platen 24 are discoid, and epithelium 6 adopts nylon to strengthen cloth and processes, and the outer edge of epithelium 6 extends to form location prominent 25 downwards; Epithelium 6 raises up and forms pressure ring 26, and pressure ring 26 is positioned on the epithelium 6 near a side of location prominent 25, and pressure ring 26 is around epithelium 6 circumference one circle; Epithelium loam cake 32 is provided with four bolt connecting holes, and four bolt connecting holes evenly are laid in around the epithelium loam cake 32, and epithelium loam cake 32 is fixedly connected with epithelium lower cover 33 through set bolt; Epithelium loam cake 32 lower end one are fixedly connected with sealing ring 22, and epithelium lower cover 33 upper ends are provided with the open slot adaptive with sealing ring 22, offer the locating slot that can hold location prominent 25 on the open slot; Location prominent 25 places in the locating slot, and the sealing ring 22 of epithelium loam cake 32 compresses with the open slot of epithelium lower cover 33, is embedded with rubber seal between sealing ring 22 sides and the epithelium lower cover 33; Be linked to be cavity between epithelium loam cake 32 and the epithelium lower cover 33, epithelium 6 is arranged in cavity and epithelium 6 makes the cavity upper-lower seal, and the upper end of universal driving shaft 7 is the little axle head that is covered with screw thread; Be bolted with two nuts on the little axle head, upper and lower surface and the epithelium 6 that top board 23 and lower platen 24 lay respectively at epithelium 6 respectively with top board 23 and lower platen 24 butts, top board 23 and lower platen 24 are between two nuts; Lower platen 24 middle parts are provided with boss, and the middle part of epithelium 6 is provided with aperture, and epithelium 6 is socketed on the boss through aperture; Top board 23 is provided with the groove adaptive with boss, and the distance of lower platen 24 to epithelium lower cover 33 is 0.4 times of epithelium 6 radiuses, top board 23 and lower platen 24 clampings; Pressure ring 26 is between location prominent 25 and top board 23, and the central upper portion position of epithelium loam cake 32 is provided with bolt apertures, and epithelium loam cake 32 is connected with compression fittings 35 through bolt apertures; The lower surface of epithelium loam cake 32 is installed with four boss shapes and places restrictions on 27, four of pieces and place restrictions on piece 27 and evenly be laid in around the bolt apertures and aim at top board 23, and epithelium lower cover 33 bottoms are provided with the epithelium holder; The bottom of epithelium holder is provided with screw thread, and epithelium holder and flowmeter bodies 1 is fixing, and universal driving shaft 7 connects epithelium lower covers 33 and epithelium holder and is slidingly connected with the two; The bottom of universal driving shaft 7 extends to the outlet side of flowmeter bodies 1, and the bottom of universal driving shaft 7 is hinged with elastic force buckle 8, is integrally formed with cheicers with universal driving shaft 7 relative ends on the elastic force buckle 8; Be installed with valve seat 9 in the put-through channel 2, valve seat 9 bottoms are provided with pilot hole 31, and valve seat 9 is provided with valve rod 10; Valve rod 10 passes pilot hole 31 and is slidingly connected with valve seat 9, and an end of valve rod 10 is provided with flap 12, and flap 12 closely is connected with valve rod 10; Be arranged with back-moving spring 11 on the valve rod 10; One end of back-moving spring 11 and valve seat 9 bottom butts, the other end and flap 12 butts, the cheicers clamping of flap 12 and elastic force buckle 8; Shown in Figure of description 5, signal trigger mechanism 4 signal trigger mechanisms 4 comprise sensor holder 14, and the bottom of sensor holder 14 is provided with screwed union 16; Screwed union 16 be axially arranged with the pillar hole 20 that extends to tongue tube 15 belows, be provided with tongue tube 15 in the sensor holder 14, be connected with magnetosensitive signal wire 18 on the tongue tube 15; Magnetosensitive signal wire 18 parts are positioned at sensor holder 14, and outside part position and the sensor holder 14, magnetosensitive signal wire 18 is connected with remote control terminal through radio; Be provided with adhesive layer between integral body that tongue tube 15 and magnetosensitive signal wire 18 constitute and the sensor holder 14, sensor holder 14 surfaces are provided with oil fill plug 21, and being inserted with in the pillar hole 20 can be along the magnet steel pillar 13 of pillar hole 20 slips; Magnet steel pillar 13 inner and upper are provided with magnet 17 near tongue tube 15 places; Magnet 17 parts are in magnet steel pillar 13, and another part is outside magnet steel pillar 13, and the bottom of magnet steel pillar 13 is provided with overcoat 19; The degree of depth of overcoat 19 is greater than magnet steel pillar 13; Bottom one side of overcoat 19 is provided with a valve rod hole, and valve rod 10 passes valve rod hole, withstands magnet steel pillar 13 in the valve rod 10 1 end its external sleeve 19; Magnet steel pillar 13 is positioned at the top of valve rod 10, and the port place of overcoat 19 is with hold-down ring 34.
The inlet end of gas Roots type flowmeter and outlet side produce pressure reduction, act on high-accuracy synchromesh gear be linked together two waists wheels on, rotate thereby drive two waists wheels.When gas Roots type flowmeter operate as normal, shown in Figure of description 2, gas gets into flowmeter bodies from inlet end; Discharge gas through the rotation of two waist wheels again, supply downstream gas-fired equipment gas just commonly used, this moment, epithelium can not deform; Remain on initial position, universal driving shaft is positioned at initial position, and the elastic force buckle is through cheicers and flap clamping; Back-moving spring is in compressive state; Valve rod passes valve rod hole and holds the magnet steel pillar, and two reeds in the tongue tube are in closure state under the absorption affinity of magnet, and signal trigger mechanism can not react.When waist wheel is installed improper or because booty when stuck, shown in Figure of description 3, two waists wheels are stuck; Gas can not be discharged through two waist wheels, and the gas of air inlet port is assembled gradually, and the gas of air inlet port gets into T-valve through conduit; Get into again in the cavity of pressure reduction seat,, the epithelium in the cavity is produced downforce along with air pressure increases gradually; When pressure during greater than the elastic deformation force of epithelium itself, the epithelium middle part will move downward, and drive universal driving shaft and together descend; Movable with the elastic force buckle that universal driving shaft is hinged, the elastic force buckle separates with flap, and valve rod and flap move to the outlet side direction under the restoring force of back-moving spring; Valve rod withdraws from overcoat, and valve rod can not support the magnet steel pillar more thereupon, and the magnet steel pillar drives the magnet steel post top portion under the self gravitation effect magnet together descends; The magnet of magnet steel pillar top is away from tongue tube, two reeds in the tongue tube since magnet away from becoming separated position by closure state, the variation of reed state transmits to remote control terminal the magnetosensitive signal wire; Remote control terminal receives signal and learns that unusual condition appears in flowmeter, reminds this gas Roots type flowmeter of operating personnel to break down, and in time notifies gas company that flowmeter is safeguarded; After by-pass collar was opened simultaneously, promptly flap moved to the put-through channel outlet side, formed less gas passage between flap and the put-through channel; Gas can be discharged through this passage, guarantees the air feed demand of downstream gas-fired equipment in the short time, and this time period can supply operating personnel to remove to safeguard the gas Roots type flowmeter.
If this gas Roots type flowmeter fails in time to safeguard; Too much when the air accumulation of air inlet port, shown in Figure of description 6, too much gas will promote the steel ball withdrawal; And can discharge through the space between steel ball and the big footpath section, this structure has avoided the gas Roots type flowmeter to damage.
Safeguard back and ability operate as normal when this gas Roots type flowmeter, the pressure reduction of entrance end reduces gradually, and the pressure on epithelium top reduces; When this gas downforce during less than the elastic deformation force of epithelium self, upwards rebound down in the effect of self elastic force in the epithelium middle part, top board with on move; Top board touches places restrictions on piece; Play position-limiting action, prevent that epithelium from excessively moving upward, the epithelium that causes damages.
Can find out that to sum up the present invention accurately reports to the police, remind the staff that flowmeter is safeguarded; Guarantee the gas just commonly used of downstream gas-fired equipment; Can too much gas be discharged through the valve port of T-valve again, prevented that the gas Roots type flowmeter from damaging, and prolonged its serviceable life under strong gas pressure; It is little to user's influence that this gas Roots type flowmeter has reliable operation, the pulsating flow interference is little, metering is accurate, break down in the scene, reduces combustion gas and carry characteristics such as trade measurement shoutage.
Should be understood that this embodiment only to be used to the present invention is described and be not used in the restriction scope of the present invention.Should be understood that in addition those skilled in the art can do various changes or modification to the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (10)
1. a gas Roots type flowmeter comprises flowmeter bodies (1), flowmeter bodies (1) but be provided with the put-through channel (2) that supplied gas is passed through; The two ends of put-through channel (2) are provided with the waist wheel, it is characterized in that, also comprise the pressure reduction seat (3) and the signal trigger mechanism (4) that are arranged on the flowmeter bodies (1); Pressure reduction seat (3) is communicated with the inlet end of put-through channel (2) through conduit (5); Be provided with the elasticity epithelium (6) that forms seal point in the pressure reduction seat (3), be connected with movably universal driving shaft (7) on the pressure reduction seat (3), universal driving shaft (7) is fixedly connected with epithelium (6); Be hinged with the elastic force buckle (8) at an end buckle angle on the universal driving shaft (7); Be provided with valve seat (9) in the put-through channel (2), valve seat (9) is provided with and can be connected with back-moving spring (11) between valve rod (10) and the valve seat (9) along the mobile valve rod (10) of put-through channel (2); Be installed with flap (12) on the valve rod (10); The cheicers clamping of flap (12) and elastic force buckle (8), signal trigger mechanism (4) comprises movably magnet steel pillar (13), magnet steel pillar (13) is resisted against valve rod (10) and goes up the end away from flap (12).
2. a kind of gas Roots type flowmeter according to claim 1; It is characterized in that described signal trigger mechanism (4) comprises sensor holder (14), be provided with tongue tube (15) in the sensor holder (14); The bottom of sensor holder (14) is provided with screwed union (16); Being axially arranged with of screwed union (16) extends to the pillar hole (20) of tongue tube (15) below, and said magnet steel pillar (13) is positioned at pillar hole (20) and is slidingly connected with screwed union (16), and the upper end of magnet steel pillar (13) is provided with magnet (17); Be connected with magnetosensitive signal wire (18) on the tongue tube (15); Magnetosensitive signal wire (18) is connected with remote control terminal through radio, and the bottom of magnet steel pillar (13) is with overcoat (19), and bottom one side of overcoat (19) is provided with valve rod (10) hole that can supply valve rod (10) to pass.
3. a kind of gas Roots type flowmeter according to claim 2; It is characterized in that; Described sensor holder (14) surface is provided with oil fill plug (21); The port place of overcoat (19) is with hold-down ring (34), is provided with adhesive layer between tongue tube (15) and magnetosensitive signal wire (18) and the sensor holder (14).
4. a kind of gas Roots type flowmeter according to claim 3; It is characterized in that; Described pressure reduction seat (3) comprises epithelium loam cake (32) and epithelium lower cover (33); Epithelium loam cake (32) is provided with the sealing ring (22) with epithelium lower cover (33) butt, and epithelium (6) edge is positioned between sealing ring (22) and the epithelium lower cover (33), is embedded with O-ring seal between sealing ring (22) side and the epithelium lower cover (33).
5. a kind of gas Roots type flowmeter according to claim 4; It is characterized in that, be bolted with two clamp nuts on the universal driving shaft (7), be provided with top board (23) and lower platen (24) between two clamp nuts; Lower platen (24) middle part is provided with boss; Top board (23) is provided with the groove adaptive with boss, top board (23) and lower platen (24) clamping, and epithelium (6) is socketed on the boss and epithelium (6) is positioned between top board (23) and the lower platen (24).
6. a kind of gas Roots type flowmeter according to claim 5; It is characterized in that; The outer edge of described epithelium (6) extends to form location prominent (25) downwards; Epithelium lower cover (33) is provided with the locating slot that can hold location prominent (25), and epithelium (6) middle part raises up and forms annular pressure ring (26), and pressure ring (26) is positioned between top board (23) and location prominent (25).
7. a kind of gas Roots type flowmeter according to claim 6; It is characterized in that; Described epithelium loam cake (32) is fixedly connected with epithelium lower cover (33) through set bolt, is installed with below the epithelium loam cake (32) and places restrictions on piece (27), places restrictions on piece (27) and aims at top board (23).
8. according to any described a kind of gas Roots type flowmeter in the claim 1 to 7; It is characterized in that, be provided with T-valve (28) between pressure reduction seat (3) and the conduit (5), a valve port of T-valve (28) is connected with conduit (5); A valve port is connected with pressure reduction seat (3); Remain a valve port and be provided with big footpath section, big footpath section is provided with sealed steel ball (29) with the junction of valve port, also is provided with compression spring (30) in the section of big footpath; One end of compression spring (30) and steel ball (29) against, the other end is connected on the section external port of big footpath.
9. according to any described a kind of gas Roots type flowmeter in the claim 1 to 7; It is characterized in that; Valve seat (9) bottom is provided with and can holds the pilot hole (31) that valve rod (10) passes, and valve rod (10) is slidingly connected with valve seat (9), and back-moving spring (11) is set on the valve rod (10); One end of back-moving spring (11) and valve seat (9) bottom butt, the other end and flap (12) butt.
10. a kind of gas Roots type flowmeter according to claim 1; It is characterized in that, be provided with T-valve (28) between pressure reduction seat (3) and the conduit (5), a valve port of T-valve (28) is connected with conduit (5); A valve port is connected with pressure reduction seat (3); Remain a valve port and be provided with big footpath section, big footpath section is provided with sealed steel ball (29) with the junction of valve port, also is provided with compression spring (30) in the section of big footpath; One end of compression spring (30) and steel ball (29) against, the other end is connected on the section external port of big footpath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203309.1A CN102759384B (en) | 2012-06-18 | 2012-06-18 | Gas roots type flow meter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203309.1A CN102759384B (en) | 2012-06-18 | 2012-06-18 | Gas roots type flow meter |
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| CN102759384A true CN102759384A (en) | 2012-10-31 |
| CN102759384B CN102759384B (en) | 2014-07-02 |
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| CN201210203309.1A Active CN102759384B (en) | 2012-06-18 | 2012-06-18 | Gas roots type flow meter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487348A (en) * | 2019-08-08 | 2019-11-22 | 浙江长虹飞狮电器工业有限公司 | The gas amount detecting device of alkaline battery |
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| US3014508A (en) * | 1957-05-06 | 1961-12-26 | Monk Philip Reginald | Liquid dispensing apparatus |
| CN2303274Y (en) * | 1997-02-22 | 1999-01-06 | 王玉鸿 | Diaphagm type oxygen flow rate and accumulating volume meter |
| CN2932325Y (en) * | 2006-07-26 | 2007-08-08 | 天津市天农科技有限公司 | Milk flowmeter |
| CN202229792U (en) * | 2011-09-30 | 2012-05-23 | 浙江苍南仪表厂 | Double-waist-wheel gas Roots flow meter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487348A (en) * | 2019-08-08 | 2019-11-22 | 浙江长虹飞狮电器工业有限公司 | The gas amount detecting device of alkaline battery |
| CN110487348B (en) * | 2019-08-08 | 2024-04-30 | 浙江长虹飞狮电器工业有限公司 | Gas amount detecting device for alkaline battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102759384B (en) | 2014-07-02 |
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