CN207976248U - Burner Secondary Air in-line meter is based on the continuous blow device for stablizing compensation pressure - Google Patents

Abstract

Burner Secondary Air in-line meter is based on the continuous blow device for stablizing compensation pressure, including pressure reducing valve, pressure reducing valve one end connects air source, the pressure reducing valve other end is connected and fixed one end of pipe, one end of the other end connection velocity of sound aperture of fixing pipe, one end of the other end connection scavenging conduit of velocity of sound aperture, one end of the other end connection threeway of scavenging conduit, the another both ends of threeway are separately connected probe tube and connecting tube, connecting tube end set pressure sensor, scavenging conduit, threeway and sampling pipe outer wall on coat heating tape.The utility model replaces flowmeter using velocity of sound aperture, velocity of sound aperture can ensure the influence of the not tested quantity space pressure oscillation of compensating flowrate, heating tape is coated on scavenging conduit, threeway and sampling pipe outer wall between velocity of sound aperture and measurement space, to ensure that temperature is constant, it can achieve the purpose that compensation pressure is stablized.

Description

Burner Secondary Air in-line meter is based on the continuous blow device for stablizing compensation pressure

Technical field

It is based on stablizing the utility model is related to pressure measurement technology field, especially burner Secondary Air in-line meter and compensate The continuous blow device of pressure.

Background technology

The measurement of Fluid pressure is one of most basic most important measurement of industrial circle, however the fluid media (medium) actually measured It is impure, often contain certain density solid particle.When measuring device is run, solid particle can enter pressure with fluid Inside force measuring device, sampling line is blocked, measuring device failure is caused.In order to avoid sampling line blocks, need with compression Air is purged, and the solid particle of blocking is removed.However this can not be solved the problems, such as at all, on the one hand, empty with compression When air-blowing is swept, flow field is disorderly, and pressure measurement is not normally functioning, and measures this period and interrupts, can not achieve continuous measurement；It is another Aspect, solid particle can condense integrally in pressure pipeline, and regularly purging fully erased can not block.Existing pressure is surveyed Amount uses a kind of mode continuously purged, and principle is：By the purging of continuous small flow, prevent solid particle in fluid Into in pressure pipe.Since there is fixed relationship to be subtracted it is therefore desirable on the basis of the pressure of measurement for flow and differential pressure One fixed pressure, you can obtain the true pressure of fluid.Although above-mentioned measurement method has theoretically prevented blockage problem, The numerical value of pressure measurement is not influenced.But in practical application in industry, effect is unsatisfactory, main reason is that：1, flow is endless Complete to stablize, existing pressure measurement mode controls the flow of continuous purge gas using suspended body flowmeter, but flow is also surveyed The influence of quantity space pressure, that is to say, that when measuring space pressure fluctuation, purge flow rate is simultaneously unstable, causes compensation pressure Power is unstable.2, environment temperature is unstable, if environment temperature changes, although the flow by flowmeter is constant, The density of purge gas can be with temperature change.So as to cause the variation of compensation pressure.

Utility model content

The purpose of this utility model is to provide burner Secondary Air in-line meters to be blown based on the continuous of compensation pressure is stablized Sweeping device replaces flowmeter with velocity of sound aperture, it is ensured that the influence of the not tested quantity space pressure oscillation of compensating flowrate, velocity of sound aperture To the pipeline outer cladding heating tape for measuring space to ensure that temperature is constant, it can achieve the purpose that compensation pressure is stablized.

Technical solution adopted by the utility model to solve its technical problems is：Burner Secondary Air in-line meter is based on steady Determine the continuous blow device of compensation pressure, including pressure reducing valve, pressure reducing valve one end connects air source, and the pressure reducing valve other end is connected and fixed pipe One end, fixing pipe the other end connection velocity of sound aperture one end, velocity of sound aperture the other end connection scavenging conduit one end, purging One end of the other end connection threeway of pipe, the another both ends of threeway are separately connected probe tube and connecting tube, connecting tube end set pressure Force snesor, scavenging conduit, threeway and sampling pipe outer wall on coat heating tape.

The utility model in order to further solve its technical problem used by technical solution be：The velocity of sound aperture Aperture is 0.1-10mm.The heat tracing temperature of the heating tape is 10-30 DEG C.Fixed frame is set above the probe tube, Gu Determine frame lower part setting bracket, bracket is connect with fixing pipe, the lower end of the vertical shaft of rotation installation, the upper end of shaft on fixed frame Solar panels are fixedly mounted, driven gear is fixedly mounted in shaft, are respectively set motor and accumulator on fixed frame, motor it is defeated Driving gear is set on shaft, driving gear is engaged with driven gear, accumulator by conducting wire respectively with solar panels, motor, Pressure sensor and heat tracing band connection.

The utility model has the beneficial effects that：The utility model replaces flowmeter, the work of velocity of sound aperture using velocity of sound aperture Principle is：There are certain pressure difference before and after orifice plate, fluid flow through orifices plate, for certain aperture, flow through the flow of orifice plate with Pressure difference increases and increases.But when pressure difference is more than a certain numerical value, fluid reaches velocity of sound by the flow velocity at orifice plate shrinkage cavity, at this moment, No matter how pressure difference increases, as long as the pressure of orifice plate upstream keeps certain, the flow for flowing through orifice plate will be maintained at certain numerical value and It is not further added by.Therefore, velocity of sound aperture can ensure the influence of the not tested quantity space pressure oscillation of compensating flowrate, velocity of sound aperture and survey Heating tape is coated on scavenging conduit, threeway and sampling pipe outer wall between quantity space, to ensure that temperature is constant, compensation pressure can be reached The purpose that power is stablized.

Description of the drawings：

Fig. 1 is the utility model structure diagram；Fig. 2 is the utility model another kind structural schematic diagram.

Specific implementation mode

Burner Secondary Air in-line meter is based on the continuous blow device for stablizing compensation pressure, as shown in Figure 1, including decompression Valve 1,1 one end of pressure reducing valve connect air source, and 1 other end of pressure reducing valve is connected and fixed one end of pipe 2, and the other end of fixing pipe 2 connects sound One end of fast aperture 3, one end of the other end connection scavenging conduit 4 of velocity of sound aperture 3, the one of the other end connection threeway 5 of scavenging conduit 4 End, the another both ends of threeway 5 are separately connected probe tube 6 and connecting tube 7,7 end set pressure sensor 8 of connecting tube, scavenging conduit 4, Heating tape 9 is coated on 6 outer wall of threeway 5 and probe tube.It connects probe tube 6 and is connected to space is measured.This structure uses velocity of sound aperture 3 Instead of flowmeter, velocity of sound aperture operation principle is：There are certain pressure difference, fluid flow through orifices plates, for certain before and after orifice plate Aperture, the flow for flowing through orifice plate increase as pressure difference increases.But when pressure difference is more than a certain numerical value (being known as critical pressure differential), stream Body reaches velocity of sound by the flow velocity at orifice plate shrinkage cavity, and at this moment, no matter how pressure difference increases, as long as the pressure of orifice plate upstream keeps one Fixed, the flow for flowing through orifice plate will be maintained at certain numerical value without being further added by.Therefore, velocity of sound aperture 3 can ensure compensating flowrate not The influence of tested quantity space pressure oscillation, 6 outer wall of scavenging conduit 4, threeway 5 and probe tube between velocity of sound aperture 3 and measurement space Upper cladding heating tape 9 can achieve the purpose that compensation pressure is stablized to ensure that temperature is constant.

The aperture of the velocity of sound aperture 3 is 0.1-10mm.This structure enables to measurement result accurate.

The heat tracing temperature of the heating tape 9 is 10-30 DEG C.This structure enables to measurement result accurate.

So that measurement result is accurate, generally require to measure the pressure for measuring the different height and position in space, and The pressure measurement of higher position need to employ large-scale lifting appliance, and measuring process is cumbersome, and same place measurement point is often irregular It measures repeatedly, measurement cost is higher, as shown in Fig. 2, fixed frame 10 is arranged in 6 top of probe tube, 10 lower part of fixed frame is set Set bracket 11, bracket 11 is connect with fixing pipe 2, on fixed frame 10 rotation install vertical shaft 12 lower end, shaft 12 it is upper Solar panels 14 are fixedly mounted in end, and driven gear 15 is fixedly mounted in shaft 12, and motor 13 is respectively set on fixed frame 10 and stores Driving gear 16 is arranged on the output shaft of motor 13 for battery 17, and driving gear 16 is engaged with driven gear 15, and accumulator 17 passes through Conducting wire is connect with solar panels 14, motor 13, pressure sensor 8 and heating tape 9 respectively.This structure setting fixed frame 10, and Fixed frame 10 is fixed on the side wall for measuring space, so as to which all parts are installed aloft by fixed frame 10, and It is that pressure sensor 8 and heating tape 9 provide electric energy by 14 sorption enhanced solar energy of solar panels, solar panels 14 also act as guarantor The effect of shield lower section all parts avoids all parts from being drenched with rain, dust corrodes.This structure can make all parts long-term It is measured to measuring space, without repeated disassembled and assembled, improves measurement efficiency, reduce measurement cost.

Specific embodiment of the present utility model is described above in association with attached drawing, but these explanations cannot be understood to The scope of the utility model is limited, the technology contents of the not detailed description of the utility model are known technology.

Claims (4)

1. burner Secondary Air in-line meter is based on the continuous blow device for stablizing compensation pressure, it is characterised in that：Including decompression Valve (1), pressure reducing valve (1) one end connect air source, and pressure reducing valve (1) other end is connected and fixed one end of pipe (2), fixing pipe (2) it is another One end connects one end of velocity of sound aperture (3), and the other end of velocity of sound aperture (3) connects one end of scavenging conduit (4), scavenging conduit (4) The other end connects one end of threeway (5), and the another both ends of threeway (5) are separately connected probe tube (6) and connecting tube (7), connecting tube (7) End set pressure sensor (8), cladding heating tape (9) on scavenging conduit (4), threeway (5) and probe tube (6) outer wall.

2. burner Secondary Air in-line meter as described in claim 1 is based on the continuous blow device for stablizing compensation pressure, It is characterized in that：The aperture of the velocity of sound aperture (3) is 0.1-10mm.

3. burner Secondary Air in-line meter as described in claim 1 is based on the continuous blow device for stablizing compensation pressure, It is characterized in that：The heat tracing temperature of the heating tape (9) is 10-30 DEG C.

4. the burner Secondary Air in-line meter as described in claim 1-3 any one is blown based on the continuous of compensation pressure is stablized Sweeping device, it is characterised in that：Bracket is arranged in setting fixed frame (10) above the probe tube (6), fixed frame (10) lower part (11), bracket (11) is connect with fixing pipe (2), the lower end of the vertical shaft (12) of rotation installation, shaft on fixed frame (10) (12) solar panels (14) are fixedly mounted in upper end, and driven gear (15) is fixedly mounted in shaft (12), divides on fixed frame (10) Not She Zhi motor (13) and accumulator (17), setting driving gear (16) on the output shaft of motor (13), driving gear (16) with Driven gear (15) engage, accumulator (17) by conducting wire respectively with solar panels (14), motor (13), pressure sensor (8) It is connected with heating tape (9).