CN209486128U - A kind of novel Pitot tube - Google Patents

A kind of novel Pitot tube Download PDF

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Publication number
CN209486128U
CN209486128U CN201920347744.9U CN201920347744U CN209486128U CN 209486128 U CN209486128 U CN 209486128U CN 201920347744 U CN201920347744 U CN 201920347744U CN 209486128 U CN209486128 U CN 209486128U
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pressure
tube
static
total
ram
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田文
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Abstract

The utility model provides a kind of novel Pitot tube, for solving in the prior art the technical problem that Pitot tube measurement error is big, manufacture is difficult, comprising: base tube, sealing plate, total head pressure, ram-air pipe, hydrostatic head, static tube, total pressure pressure tap and static pressure pressure tap;Wherein, total head pressure and the hydrostatic head interlaced arrangement on base tube extending direction;Total head pressure is connected to total pressure pressure tap by ram-air pipe;Hydrostatic head is connected to static pressure pressure tap by static tube;Sealing plate seals the both ends of base tube, and passes through for ram-air pipe and static tube;Implement the technical solution of the utility model, static pressure pressure tap and total pressure pressure tap distance farther out, do not interfere with each other, improve Pitot tube detection accuracy;Temperature sensor is set, and optimization algorithm improves detection accuracy;Ram-air pipe and the static tube reasonable layout on sealing plate are convenient for the process operations such as welding, are conducive to large-scale production.

Description

A kind of novel Pitot tube
Technical field
The utility model relates to barometric surveying field, in particular to a kind of novel Pitot tube.
Background technique
Pitot tube is the detection device for measuring gas pressure.The total pressure of gas in pipelines and quiet can be measured by Pitot tube Pressure, and then can determine the flow velocity of gas in pipelines, but total head pressure and hydrostatic head can flow gas and impact, gas passes through When can be formed about the wake zone of gas movement disorder in total head pressure and hydrostatic head, the air-flow of disorder will lead to total pressure and static pressure Measurement error.Furthermore existing Pitot tube total head pressure and hydrostatic head are closely located, and hydrostatic head is in addition to the wake flow in itself formation Can also be in the wake zone that total head pressure is formed except area, thus static pressure measurement error is larger, and gas flow rate is caused to calculate measurement As a result inaccurate.And Pitot tube small volume, complex manufacturing process, higher cost.
Therefore the Pitot tube that one kind is structurally reasonable, measurement is accurate, is simple to manufacture is needed.
Utility model content
In order to solve the above-mentioned technical problem, a kind of novel Pitot tube, the skill of the utility model are disclosed in the utility model Art scheme is implemented:
A kind of novel Pitot tube, comprising: base tube, sealing plate, total head pressure, ram-air pipe, hydrostatic head, static tube, total pressure pressure tap With static pressure pressure tap;Wherein, the total head pressure and hydrostatic head interlaced arrangement on the base tube extending direction;The total pressure Head is connected to the total pressure pressure tap by the ram-air pipe;The hydrostatic head is connected to the static pressure by the static tube and surveys Press mouth;The sealing plate seals the both ends of the base tube, and passes through for the ram-air pipe and the static tube.
Preferably, the novel Pitot tube, further includes temperature sensor, close to the total pressure pressure tap and static pressure pressure tap Sealing plate be equipped with thermometer hole, the temperature sensor pass through the thermometer hole, measure the temperature in the base tube.
Preferably, the novel Pitot tube, further includes two pressure sensors, and described two pressure sensors are separately connected The total pressure pressure tap and the static pressure pressure tap.
Preferably, the ram-air pipe, the static tube are with the sealing plate by being welded and fixed.
Preferably, the center of the ram-air pipe is not less than at a distance from the center of the static tube is on the sealing plate 15mm。
Preferably, the base tube is stainless steel tube, and diameter is not more than 50mm, and wall thickness is not less than 1mm.
The skill that Pitot tube measurement error is big, manufacture is difficult can be solved in the prior art by implementing the technical solution of the utility model Art problem;Implement the technical solution of the utility model, static pressure pressure tap and total pressure pressure tap distance farther out, do not interfere with each other, improve Pitot tube detection accuracy;Temperature sensor is set, and optimization algorithm improves detection accuracy;Ram-air pipe and static tube close on sealing plate Reason distribution, is convenient for the process operations such as welding, is conducive to large-scale production.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is an embodiment of the present invention, for those of ordinary skill in the art, before not making the creative labor property It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of Pitot tube front view of specific embodiment of the utility model;
Fig. 2 is a kind of Pitot tube top view of specific embodiment of the utility model;
Fig. 3 is a kind of Pitot tube cross section structure schematic diagram of specific embodiment of the utility model.
In above-mentioned attached drawing, each figure number label is respectively indicated:
1- base tube;2- sealing plate;3- static pressure pressure tap;4- static tube;5- total pressure pressure tap;6- ram-air pipe;7- hydrostatic head;8- Total head pressure;9- thermometer hole.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, fall within the protection scope of the utility model.
In a kind of specific embodiment of the utility model, a kind of novel Pitot tube, as shown in Figure 1, Figure 2 and Figure 3, packet It includes: base tube 1, sealing plate 2, static pressure pressure tap 3, static tube 4, total pressure pressure tap 5, ram-air pipe 6, hydrostatic head 7 and total head pressure 8;Wherein, Static pressure pressure tap 3 and the interlaced arrangement on 1 extending direction of base tube of total pressure pressure tap 5;Static pressure pressure tap 3 is connected to by static tube 4 To hydrostatic head 7;Total pressure pressure tap 5 is connected to total head pressure 8 by ram-air pipe 6;Sealing plate 2 seals the both ends of base tube 1, and for static tube 4 and ram-air pipe 6 pass through.
In the prior art, in order to reduce production cost, static tube 4 and ram-air pipe 6 be standing to be set to the identical gold of specification, shape Belong to pipe, same point is arranged in pipeline in static pressure pressure tap 3 and total pressure pressure tap 5, is respectively facing and backwards to airflow direction, uses This measurement means, when air-flow flows through static pressure pressure tap 3, static pressure pressure tap 3 can impact the flowing of air-flow, make by complete The air-flow of pressure pressure tap 5 is in disturbance state, is easy to cause total pressure pressure tap 5 to measure inaccuracy, to improve barometric surveying Error.
In this specific embodiment, static tube 4 and ram-air pipe 6, static pressure pressure tap 3 and total pressure pressure tap 5 are set as straight Pipe produces convenient for lot-size metaplasia, reduces device production cost.The caliber of Pitot tube is set as 8mm, is relatively large in diameter, and avoids pipe Lead to the reduction of barometric surveying precision in the case that diameter is too small and caliber is too long, convenient for Pitot tube compared with being arranged under high measurement accuracy For long length, the applicable scene of Pitot tube can be increased, improve Pitot tube compatibility.Static tube 4 is parallel with ram-air pipe 6 to be set It sets, passes through sealing plate 2, base tube 1, be set to off symmetrical in 1 center of base tube, static tube 4 and ram-air pipe 6 are outside base tube 1 Apart from identical, keep influence of the ambient temperature to static tube 4 and ram-air pipe 6 close, it is possible to reduce 1 ambient temperature of base tube Influence to detection accuracy, and can corrosion with less gas in pipelines to static tube 4 and ram-air pipe 6, extend device lifetime.
The distance of hydrostatic head 7 and total head pressure 8 is set as 100mm on 1 direction of base tube, hydrostatic head 7 towards with airflow direction On the contrary, the total pressure for measuring fluid, total head pressure 8 are with static pressure difference towards, measurement air-flow static pressure identical as airflow direction, total pressure For dynamic pressure, external computing device can realize the measurement to gas flow rate by dynamic pressure conversion gas flow rate.Hydrostatic head 7 and complete Distance is remote between pressure head 8, and hydrostatic head 8 is in outside the wake zone that total head pressure 8 and ram-air pipe 6 are formed, and reduces total head pressure 8 and ram-air pipe The influence of 6 pairs of static pressure measurements effectively improves static pressure detection accuracy.User can also be arranged different quiet according to practical pipeline situation Pressure pipe 4 improves Pitot tube compatibility at a distance from 6 spacing of ram-air pipe and hydrostatic head 7 and total head pressure 8.
The method system that integrated casting can be used with ram-air pipe 6 with static tube 4, total pressure pressure tap 5 in static pressure pressure tap 3 It makes, screw thread can be set in static pressure pressure tap 3 and total pressure pressure tap 5, for connecting external pressure measuring device.Pitot tube and survey are pressed It installs and is set to removably, store Pitot tube convenient for user.
In a preferred embodiment, a kind of novel Pitot tube further includes as shown in Figure 1, Figure 2 and Figure 3 that temperature passes Sensor is equipped with thermometer hole 9 close to the sealing plate 2 of static pressure pressure tap 3 and total pressure pressure tap 5, and temperature sensor passes through thermometer hole 9, surveys Measure the temperature in base tube 1.Due to base tube 1 often some stretch out pipeline, the temperature inside base tube 1 may be with pipeline The temperature of interior gas is different, and the gas pressure that the temperature inside base tube 1 will cause in static tube 4 and ram-air pipe 6 changes, from And the dynamic pressure being calculated is caused to have large error, cause gas flow rate measurement large error occur.In the specific embodiment In, the simple sensor of the structures such as thermocouple sensor can be used in temperature sensor, and thermocouple sensor is small in size, Ke Yicong Lesser thermometer hole 9 protrudes into inside base tube 1, and 1 internal temperature of base tube is with 1 external environment of base tube when avoiding 9 aperture of thermometer hole excessive Temperature change is too fast, improves the accuracy of Pitot tube testing result.
In a preferred embodiment, a kind of novel Pitot tube further includes as depicted in figs. 1 and 2 that two pressure pass Sensor, two pressure sensors are separately connected static pressure pressure tap 3 and total pressure pressure tap 5.Pressure sensor can be surveyed by static pressure Mouth 3 and threaded connection static pressure pressure tap 3 and total pressure pressure tap 5 in total pressure pressure tap 5 are pressed, measures 3 He of static pressure pressure tap respectively Gas pressure in total pressure pressure tap 5, user calculate the gas flow rate in pipeline with this.
In a preferred embodiment, as shown in Figure 1, Figure 2 and Figure 3, static tube 4, ram-air pipe 6 and sealing plate 2 pass through It is welded and fixed, the welding manners such as laser spot welding, melting welding can be used, effectively improve the connection of static tube 4, ram-air pipe 6 and sealing plate 2 Intensity, when avoiding air in pipeline flow velocity excessive, hydrostatic head 7 and the long-term stress of total head pressure 8 lead to static tube 4 and ram-air pipe 6 Position is moved, and can also be entered Pitot tube by the gap on sealing plate 2 to avoid the corrosive gas in pipeline, be caused temperature The damage or environmental pollution of sensor.
In a preferred embodiment, as shown in Figure 1, Figure 2 and Figure 3, in the center of static tube 4 and ram-air pipe 6 Distance of the heart on sealing plate 2 is not less than 15mm, and sufficient operating space can be reserved to operations such as welding.7 He of hydrostatic head simultaneously Total head pressure 8 has certain distance in gas flow direction, reduces influence of the total pressure measurement to static pressure measurement.
In a preferred embodiment, as shown in Figure 1, Figure 2 and Figure 3, base tube 1 is stainless steel tube, and diameter is not more than 50mm, wall thickness are not less than 1mm, control the volume of base tube 1 in smaller range, and control the weight of base tube 1 in lighter range, The influence that gas is flowed in the installation of Pitot tube is reduced, device reliability is improved.Stainless steel tube has stronger support strength, and And there is certain corrosion resistance, extend service using life, can be adapted for the gasmetry containing certain organic matter.
It should be pointed out that the above is only the preferred embodiment of the utility model only, not to limit this reality With novel, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on should all include It is within the protection scope of the utility model.

Claims (6)

1. a kind of novel Pitot tube characterized by comprising base tube, sealing plate, total head pressure, ram-air pipe, hydrostatic head, static tube, complete Press pressure tap and static pressure pressure tap;Wherein,
The total head pressure and hydrostatic head interlaced arrangement on the base tube extending direction;
The total head pressure is connected to the total pressure pressure tap by the ram-air pipe;
The hydrostatic head is connected to the static pressure pressure tap by the static tube;
The sealing plate seals the both ends of the base tube, and passes through for the ram-air pipe and the static tube.
2. a kind of novel Pitot tube according to claim 1, which is characterized in that further include temperature sensor, close to described The sealing plate of total pressure pressure tap and static pressure pressure tap is equipped with thermometer hole, and the temperature sensor passes through the thermometer hole, described in measurement Temperature in base tube.
3. a kind of novel Pitot tube according to claim 2, which is characterized in that it further include two pressure sensors, it is described Two pressure sensors are separately connected the total pressure pressure tap and the static pressure pressure tap.
4. a kind of novel Pitot tube according to claim 3, which is characterized in that the ram-air pipe, the static tube and institute Sealing plate is stated by being welded and fixed.
5. a kind of novel Pitot tube according to claim 4, which is characterized in that the center of the ram-air pipe and the static pressure Distance of the center of pipe on the sealing plate is not less than 15mm.
6. a kind of novel Pitot tube according to claim 5, which is characterized in that the base tube is stainless steel tube, and diameter is not Greater than 50mm, wall thickness is not less than 1mm.
CN201920347744.9U 2019-03-19 2019-03-19 A kind of novel Pitot tube Active CN209486128U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920347744.9U CN209486128U (en) 2019-03-19 2019-03-19 A kind of novel Pitot tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920347744.9U CN209486128U (en) 2019-03-19 2019-03-19 A kind of novel Pitot tube

Publications (1)

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CN209486128U true CN209486128U (en) 2019-10-11

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113125800A (en) * 2021-04-19 2021-07-16 重庆地格科技有限责任公司 Wind speed and direction measuring method based on pitot tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113125800A (en) * 2021-04-19 2021-07-16 重庆地格科技有限责任公司 Wind speed and direction measuring method based on pitot tube
CN113125800B (en) * 2021-04-19 2023-01-06 重庆地格科技有限责任公司 Wind speed and direction measuring method based on pitot tube

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