A kind of gas flow orifice plate caliberating deviceTechnical field
The present invention relates to the calibration technique field of gas flow metering device, more particularly to a kind of gas flow orifice plate to demarcateDevice.
Background technology
The linear orifice plate of punishment gas flow can be used for gas flow of the accurate measurement by it.But flow-through orifice is in processingIt is evitable error to be present, so its orifice flow constant and the theoretical value of design have deviation, it is necessary to be demarcated by testing, togetherWhen orifice plate box vavuum pump mounting means it is complicated, be unfavorable for the assembling of equipment, influence operating efficiency.
The content of the invention
The invention aims to solve shortcoming present in prior art, such as：But flow-through orifice can be kept away in processingThe presence error exempted from, so its orifice flow constant and the theoretical value of design have deviation, it is necessary to be demarcated by testing, while holeThe mounting means of plate box vavuum pump is complicated, is unfavorable for the assembling of equipment, influences operating efficiency.
To achieve these goals, present invention employs following technical scheme：
A kind of gas flow orifice plate caliberating device, including base, the base are provided with working gas container, the working gasThe side of container is provided with getter device, and the opposite side of the adjustment container is communicated with vacuum tank, the side connection of the vacuum tankThere is delivery pipe, the delivery pipe is provided with manually-operated gate, preceding manometer and rear manometer, institute are additionally provided with the delivery pipeState and orifice plate box is provided between preceding manometer and rear manometer, be connected with installing plate in the orifice plate box, on the installing plateOrifice plate and chute are additionally provided with, the both sides of the orifice plate are respectively connected with clamping plate, and the side of the clamping plate is fixedly connected with slide bar, describedOne end of slide bar passes through the side wall of chute and is fixedly connected with movable block, and the movable block is slidably connected in chute, the shiftingThe second V shape pole is rotatably connected on motion block, one end of second V shape pole is rotatably connected to fixed block, turned on the fixed blockIt is dynamic to be connected with rotating bar, thread bush is socketed with the rotating bar, threaded block, the screw thread are threaded with the thread bushThe first V shape pole, one end of first V shape pole and the second V shape pole are rotatably connected on block as rotation connection, first V-arrangementOn a mounting board, the other end of the delivery pipe is provided with two first outlet pipes and second outlet for the other end rotation connection of barPipe, one end of the first outlet pipe are connected with adjustment container, and one end of the second outlet pipe is connected with gas device, describedAdjustment container is located on collection device, and the side of the adjustment container is connected with vavuum pump, and annular is additionally provided with the baseFixed plate, four carriages are fixedly connected with the inside of the ring-type fixing plate, the side of each carriage is provided withTrapezoidal fixed block, turn is interspersed with the trapezoidal fixed block of institute, the side of the turn is provided with rotating disk, the center of the rotating diskPlace is interspersed with rotating shaft, and one end of the rotating shaft is connected to the bottom of base, the second sector is fixedly connected with the turnWheel, the second sector gear engagement are connected with the first sector gear, and one end of first sector gear is interspersed with rotational pin,One end of the rotational pin is fixedly connected on the bottom of base, and straight pin, the base are interspersed with first sector gearOne end be provided with multiple circular holes, the straight pin is located in circular hole, and one end of first sector gear is fixedly connected with secondHandle.
Preferably, the getter device includes communicating pipe, and one end of the communicating pipe is connected with air entry, the air entryHorn-like, the other end of the communicating pipe is connected to the side of working gas container.
Preferably, the carriage includes support bar, and one end of the support bar is fixedly connected on ring-type fixing plateSide, the other end of the support bar are rotatably connected to pulley, and the pulley is against the side of trapezoidal fixed block.
Preferably, the both ends of the base are fixedly connected with multiple cylindrical sleeves, and fixing bolt is interspersed with the cylindrical sleeve.
Preferably, rubber blanket is wrapped with the first in command and the second in command, anti-slip veins are set on the rubber blanket.
Preferably, the slide bar and sliding shoe are formed in one.
Compared with prior art, the beneficial effects of the invention are as follows：Operation simple in construction is easy, by rotating bar, slide bar withAnd the interaction of the knot such as movable block, clamping plate can be drawn close to center, be easy to the clamping of orifice plate, while fill using slidingPut, trapezoidal fixed block and the isostructural interaction of the first sector can be easy to vacuum so that turn shrinks inwardsPump clamps, while can demarcate its gas flow using the covering device.
Brief description of the drawings
Fig. 1 is a kind of positive structure schematic of gas flow orifice plate caliberating device proposed by the present invention；
Fig. 2 is a kind of orifice plate clamping device structural representation of gas flow orifice plate caliberating device proposed by the present invention；
Fig. 3 is a kind of vavuum pump clamping device structural representation of gas flow orifice plate caliberating device proposed by the present invention.
In figure：Manometer, 7 peaces before 1 base, 2 getter devices, 3 working gas containers, 4 vacuum tanks, 5 manually-operated gates, 6Loading board, 8 orifice plates, 9 first in command, 10 clamping plates, 11 slide bars, 12 movable blocks, 13 chutes, 14 first V shape poles, 15 fixed blocks, 16Manometer behind two V shape poles, 17 rotating bars, 18 thread bush, 19 threaded blocks, 20 orifice plate boxes, 21,22 delivery pipes, 23 adjustment containers,24 vavuum pumps, 25 second in command, 26 ring-type fixing plates, 27 gas devices, 28 carriages, 29 trapezoidal fixed blocks, 30 turns,31 second sector gears, 32 straight pins, 33 circular holes, 34 rotational pins, 35 first sector gears.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, completeSite preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
In the description of the invention, it is to be understood that term " on ", " under ", "front", "rear", "left", "right",The orientation or position relationship of the instruction such as " top ", " bottom ", " interior ", " outer " are based on orientation shown in the drawings or position relationship, are onlyDescribed for the ease of description is of the invention with simplified, rather than the device or element of instruction or hint meaning must be with specifically sidesPosition, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.
Reference picture 1-3, a kind of gas flow orifice plate caliberating device, including base 1, the both ends of base 1 are fixedly connected with moreIndividual cylindrical sleeve, fixing bolt is interspersed with cylindrical sleeve, increases the stability of equipment, base 1 is provided with working gas container 3, workThe side for making gas container 3 is provided with getter device 2, and getter device 2 includes communicating pipe, and one end of communicating pipe is connected with air entry,Air entry is horn-like, and the other end of communicating pipe is connected to the side of working gas container 3, and horn-like air entry can absorb moreMore gas, the opposite side of adjustment container 3 are communicated with vacuum tank 4, and the side of vacuum tank 4 is connected with delivery pipe 22, delivery pipe 22Manually-operated gate 5 is provided with, preceding manometer 6 and rear manometer 21, preceding manometer 6 and rear pressure are additionally provided with delivery pipe 22Orifice plate box 20 is provided between instrument 21, installing plate 7 is connected with orifice plate box 9, orifice plate 8 and chute 13, hole is additionally provided with installing plate 7The both sides of plate 8 are respectively connected with clamping plate 10, and the side of clamping plate 10 is fixedly connected with slide bar 11, and one end of slide bar 11 passes through chute 13Side wall is simultaneously fixedly connected with movable block 12, and slide bar 11 and sliding shoe 12 are formed in one, and are easy to manufacture, and movable block 12 is slidably connectedIn chute 13, the second V shape pole 16 is rotatably connected on movable block 12, one end of the second V shape pole 16 is rotatably connected to fixed block15, rotating bar 17 is rotatably connected on fixed block 15, and thread bush 18 is socketed with rotating bar 17, is threaded with thread bush 18Threaded block 19, the first V shape pole 14, one end of the first V shape pole 14 and the second V shape pole 16 are rotatably connected on threaded block 19 to rotateConnection, the other end of the first V shape pole 14 are rotatably connected on installing plate 7, and the other end of delivery pipe 22 is provided with two first outletsPipe and second outlet pipe, one end of first outlet pipe are connected with adjustment container 23, and one end of second outlet pipe is connected with gas dress27 are put, working gas device is collected built with multiple rewinding containers；The air inlet of each rewinding container is provided with valve, adjustsLift face device 23 is located on collection device 27, and the side of adjustment container 23 is connected with vavuum pump 24, and it is solid that annular is additionally provided with base 1Fixed board 26, the inner side of ring-type fixing plate 26 are fixedly connected with four carriages 28, and carriage 28 includes support bar, support barOne end be fixedly connected on the side of ring-type fixing plate 26, the other end of support bar is rotatably connected to pulley, and pulley is against trapezoidalThe side of fixed block 29, it is easy to that trapezoidal fixed block will be extruded by support bar and pulley, the side of each carriage 28 is provided withTrapezoidal fixed block 29, is interspersed with turn 30 in trapezoidal fixed block 29, and the side of turn 30 is provided with rotating disk, at the center of rotating diskRotating shaft is interspersed with, one end of rotating shaft is connected to the bottom of base 1, and the second sector gear 31 is fixedly connected with turn 30, theThe engagement of two sector gears 31 is connected with the first sector gear 35, and one end of the first sector gear 35 is interspersed with rotational pin 34, rotatesOne end of pin 34 is fixedly connected on the bottom of base 1, and straight pin 32 is interspersed with the first sector gear 11, and one end of base 1 is setThere are multiple circular holes 33, straight pin 32 is located in circular hole 33, and one end of the first sector gear 11 is fixedly connected with the second in command 25, theRubber blanket is wrapped with leader 9 and the second in command 25, anti-slip veins is set on rubber blanket, is easy to rotate, prevent from skidding, demarcationExperiment process is as follows：Orifice plate 8 is placed in orifice plate box 4 first, is then collected all rewinding containers in working gas device and is evacuatedAfterwards, the weight of each rewinding container is weighed respectively, and rewinding container and adjustment container 9 use liquid nitrogen frozen；Then working gasContainer 3 and vacuum tank 4 communicate, and make the working gas that certain pressure is full of in vacuum tank 4；Open the valve and hand of adjustment container 23Movable valve 5, connection working gas feed circuit and rewinding circuit, rewinding are received to adjustment container 23, and pressure ratio is more than before and after making orifice plate 82, to meet sonic conditions, if pressure is higher after orifice plate 8, it vavuum pump 24 can be used to take out low-pressure；Regulation manually-operated gate 5 makes holeThe pressure that manometer 6 is shown before plate reaches preset value, closes the valve of adjustment container 23 after stable, while open one of themThe valve of rewinding container, timing start；After reaching rewinding time t, the valve of the rewinding container is closed；After pulling down the rewinding containerWeigh the weight after rewinding；Gas flow, then profit can be obtained by weight difference before and after rewinding container rewinding and the time collectedOrifice coefficient K can be obtained with formula G=Kd2 P 1, wherein：G- passes through the gas flow of orifice plate, K- orifice coefficients, d- orifice platesThe diameter of middle measured hole, gas pressure before 1-orifice plates of P.Calibrated orifice plate 8 is arranged on after needing position to be mounted, need to only be knownPressure meets sonic conditions before and after pressure P 1 and orifice plate 8 before road orifice plate 8, so that it may is calculated by formula G=Kd2 P 1Pass through the gas flow G of orifice plate 8.
In the present invention, when user uses the device, rotating bar 17 is allowed to rotate, so that thread bush 18 rotates, and thenThe threaded block 19 made moves on thread bush 18, so as to drive the first V shape pole 14 and the second V shape pole 16 to rotate, then to moveThe movement of band moving slide-bar 11 drives clamping plate 10 to clamp orifice plate 8 while motion block 12 slides in chute 13, then using secondHand 25 rotates the first sector gear 35, so as to drive the second sector gear 31 to rotate, then drives spring 30 to rotate, then utilizesRoller on carriage 28 while is extruded trapezoidal fixed block 29 to center of turntable, then in the slip of trapezoidal fixed block 29Drive turn 30 to press to center extruding, vavuum pump 24 can thus be clamped.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and itsInventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.