CN220625390U - Contact type rectangular air duct section flow velocity distribution measuring device - Google Patents
Contact type rectangular air duct section flow velocity distribution measuring device Download PDFInfo
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- CN220625390U CN220625390U CN202322392223.4U CN202322392223U CN220625390U CN 220625390 U CN220625390 U CN 220625390U CN 202322392223 U CN202322392223 U CN 202322392223U CN 220625390 U CN220625390 U CN 220625390U
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- velocity distribution
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- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000005381 potential energy Methods 0.000 abstract description 3
- 230000005483 Hooke's law Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000009434 installation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 239000005336 safety glass Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The utility model discloses a contact type rectangular air duct section flow velocity distribution measuring device which comprises a supporting pipe, wherein a supporting frame is arranged in the supporting pipe, the supporting frame is arranged on the cross section inside the supporting pipe, a plurality of flow velocity converters are arranged on the supporting frame, each flow velocity converter comprises a spring pile casing, the axis of each spring pile casing is perpendicular to the cross section of the supporting pipe, a spring is connected in each spring pile casing, the front end of each spring is connected with the supporting frame, the tail end of each spring is connected with a resistance plate through a connecting rod, and each resistance plate is positioned outside each spring pile casing. The device is contacted with the resistance plate in the supporting tube through air flow, so that the air flow kinetic energy in the air tube is converted into the elastic potential energy of the spring, and the flow velocity distribution in the flow velocity field of the inner section of the air tube is measured by combining Hooke's law and a hydrodynamic impulse equation, so that powerful data support is provided for maintenance, air tightness detection and service life assessment of the air tube.
Description
Technical Field
The utility model belongs to the technical field of pipe flow section flow velocity measuring devices, and discloses a contact type rectangular air pipe section flow velocity distribution measuring device.
Background
There are a large number of gas pipelines in industrial and civil buildings, both with and without pressure pipelines. The measurement and calculation of the hydrodynamic parameters in the pipeline have important guiding significance for the design, maintenance and maintenance of the pipeline. Especially, the rectangular air pipe (the rectangular section is most widely applied) in the ventilation and air conditioning industry in a large industrial factory building is mostly manufactured by galvanized iron sheets, and has the characteristics of high installation height, large cross section area, large dead weight, easy shaking, multiple special-shaped pipe sections and the like. Quality defects in later operation after construction acceptance are often caused by galvanized iron sheet quality problems and improper interface construction treatment.
How can obtain the distribution law of rectangle tuber pipe section flow to confirm the iron sheet thickness that the tuber pipe design was used and the rigidity parameter of tuber pipe internal support, how can in time discover the problem in its operation, thereby correct the mistake, these two points have important meaning to extension tuber pipe's life and assurance its stability. Meanwhile, the method calculates the average value of the on-way resistance loss and the local resistance loss in the limited section of the air pipe, and the work has powerful data judgment basis for the leakage detection and the installation quality evaluation of the air pipe.
At present, no suitable detection device exists in the engineering field at home and abroad, and the monitoring and displaying of the internal real-time state of the air pipe cannot be realized. In order to prevent problems in advance and discover problems in time during operation, it is a necessary measure to add detection devices at different parts of the pipe section.
Disclosure of Invention
Aiming at the technical problems, the utility model discloses a contact type rectangular air duct section flow velocity distribution measuring device which converts air flow kinetic energy in an air duct into elastic potential energy of a spring, can effectively and accurately measure section flow velocity in the air duct, and provides powerful judgment basis for maintenance, detection and service life assessment of the air duct.
The utility model provides a contact rectangle tuber pipe section velocity of flow distribution measuring device, includes the stay tube, be provided with the support frame in the stay tube, the support frame is installed on the inside cross section of stay tube, install a plurality of velocity of flow converters on the support frame, the velocity of flow converter includes that axis and stay tube cross section are vertically spring protects a section of thick bamboo, spring protects a section of thick bamboo in being connected with the spring, the front end of spring is connected to on the support frame, the end-to-end connection of spring has the resistance board, the resistance board is located the spring and protects a section of thick bamboo outside direct and airflow contact.
Preferably, the spring is connected with the resistance plate through a connecting rod, and the connecting rod and the spring casing are coaxially arranged.
Preferably, a pointer for indicating the expansion and contraction amount of the spring is arranged on the connecting rod.
Preferably, one end of the spring protection cylinder, which is far away from the spring, is provided with a connecting rod protection tube, and the connecting rod protection tube is coaxially sleeved outside the connecting rod.
Preferably, the plane of the resistance plate and the cross section of the support tube are arranged in parallel.
Preferably, at least 5 flow velocity converters are arranged in the cross-sectional flow velocity field, and at least one flow velocity converter is installed at the center of the support tube.
Preferably, the flow velocity converters are installed symmetrically to each other in the region outside the center of the support tube.
Preferably, the support frame is formed by mutually crossing at least two support rods.
Preferably, the outer side of the pipe wall of the spring casing is provided with a size scale value.
Preferably, the support tube is made of organic glass, and flanges used for being connected with the air pipe are respectively arranged at two ends of the support tube.
The beneficial effects are that:
according to the utility model, the converters are arranged in the cross-sectional areas, the kinetic energy of air flow in the air pipe is converted into the elastic potential energy of the spring by the converters, and the flow velocity at different converter positions is calculated by the hydrodynamic impulse equation. The method is characterized in that the flow velocity distribution size and rule in the section range are obtained, meanwhile, the mean value of the on-way resistance coefficient and the local resistance coefficient which are available in engineering can be obtained, the flow resistance and the energy loss of fluid in the air pipe are evaluated, the trend of the air pipe is further improved, the setting of special-shaped pieces is optimized, the flow velocity size in the air pipe is monitored in real time, the service life of the air pipe is measured and calculated, the installation quality and the leakage detection of the air pipe are monitored and inspected, and the method has important significance for the design and the later maintenance of the air pipe.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the overall structure of the present utility model.
Fig. 2 is a schematic diagram of the structure of the converter (a) of the present utility model.
The method comprises the following steps: b. An air duct; 1. a support tube; 2. a support frame; the device comprises an A converter, A1 and a spring; a2, a spring protection cylinder; a3, connecting a rod protection tube; a4, a resistance plate; a5, a pointer; a6, connecting rods.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by way of the drawings are exemplary only and should not be construed as limiting the utility model.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, and/or groups thereof.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
In the description of this specification, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the description of the present specification, the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate an orientation or positional relationship based on that shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present technology.
The terms "mounted," "connected," and "disposed" are to be construed broadly, and may be, for example, fixedly connected, disposed, detachably connected, or integrally connected, disposed, unless otherwise specifically defined and limited. The specific meaning of the above terms in the present technology can be understood by those of ordinary skill in the art according to the specific circumstances.
In order that the utility model may be readily understood, a further description of the utility model will be rendered by reference to specific embodiments that are illustrated in the appended drawings and are not to be construed as limiting the practice of the utility model.
It will be appreciated by those skilled in the art that the drawings are merely schematic representations of the embodiments, and that the elements in the drawings are not necessarily required to practice the utility model.
As shown in figures 1-2, the utility model discloses a device for measuring the flow velocity distribution of a cross section of a contact type rectangular air duct, which utilizes a supporting tube 1 to replace an original galvanized iron sheet air duct, and flanges are arranged at two ends of the supporting tube and are used for being connected with the existing air duct. The supporting tube is made of organic safety glass, has the same size as the existing air duct and has the length of 200mm
The cross-shaped support frame 2 is arranged in the support tube 1, the plane of the cross formed by the two support rods of the support frame is required to be parallel to the cross section of the air pipe as much as possible, a flow velocity converter A is arranged at the center of intersection of the two support rods of the support frame, at least one flow velocity converter A is arranged at the outer end parts of the two support rods, the flow velocity converter is a mechanism which uses spring stress to stretch and deform, the mechanism comprises a spring protection tube A2 with the axis perpendicular to the cross section of the air pipe, the spring protection tube is a cylinder with two through ends, the front end of the spring protection tube is connected with the support frame 2, the rear end of the protection tube is suspended, a spring A1 is arranged in the spring protection tube, the spring is comprehensively selected according to the size of the cross section of the air pipe and the flow of the air machine, and conventionally configured spring specifications are 1.0 x 25 x 50, 2.0 x 40 x 50, 2.5 x 40 x 60, 3.0 x 60 and the like (the length of the outside diameter of the air pipe) and the flow velocity in the air pipe is adapted by replacing springs with different rigidities. The other end of the spring is connected with a connecting rod A6, the axis of the connecting rod is coaxial with the axis of the spring protection barrel A2, the connecting rod extends to the outside of the spring protection barrel towards the right side of the position shown in fig. 1-2, the right end of the spring protection barrel is connected with a connecting rod protection pipe A3, the connecting rod penetrates through the connecting rod protection pipe rightwards and then protrudes out of the connecting rod protection pipe, the protruding part of the connecting rod is connected with a resistance plate A4, and the resistance plate and the cross section of the supporting pipe are mutually parallel. In order to measure the deformation of the spring, a spring pointer A5 is arranged on the connecting rod, and a size scale value is arranged on the surface of the spring protection tube.
The connecting rod and the resistance plate are made of rigid materials with small deformation.
The basic principle of the device is as follows:
the device is characterized in that a flow velocity converter A is designed, the viscous characteristic of fluid is utilized to contact with the converter in an air pipe B, the fan flow drives a resistance plate component of the converter A, the fluid flow is converted into the elongation of a spring A1, and the force is equivalently calculated by utilizing Hooke's law. As known from Newton's internal friction law, the flow velocity distribution of each point in the section flow velocity field is different, the approximate shape is a secondary parabolic curve, and the fan flow parameters are combined with the hydrodynamic impulse equationThe flow velocity at each point where the transducer is arranged in the cross section range can be obtained, and then the flow velocity distribution condition can be determined. Thus, various practical effects can be achieved: firstly, the display of the internal working condition of the air pipe in the operation process can be obtainedThe flow velocity parameters at different device positions are obtained through simple calculation, so that whether the air pipe leaks or not is judged, and the quality of the air pipe installation quality is checked; secondly, the available on-way resistance coefficient and local resistance coefficient in engineering can be obtained to evaluate the flow resistance and energy loss of fluid in the air pipe, further the trend of the air pipe is improved, the setting of the special-shaped piece is optimized, furthermore, the service life of the air pipe can be predicted by the on-way resistance coefficient, if the on-way resistance loss is large, the pressure of the air pipe can be increased, the service life can be reduced, and the on-way resistance coefficient can provide data support for the design, the installation and the maintenance of the air pipe, so that the on-way resistance coefficient has important guiding significance.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a contact rectangle tuber pipe section velocity of flow distribution measuring device, its characterized in that, including stay tube (1), be provided with support frame (2) in the stay tube, the support frame is installed on the inside cross section of stay tube, install a plurality of velocity of flow converters (A) on the support frame, the velocity of flow converters includes that axis and stay tube cross section are perpendicular's spring protects a section of thick bamboo (A2), spring protects a section of thick bamboo in being connected with spring (A1), the front end of spring is connected to on the support frame, the end-to-end connection of spring has resistance board (A4), the resistance board is located the spring and protects a section of thick bamboo outside direct and airflow contact.
2. The device for measuring the flow velocity distribution of the cross section of the rectangular contact air duct according to claim 1, wherein the spring (A1) is connected with the resistance plate (A4) through a connecting rod (A6), and the connecting rod is coaxially arranged with the spring casing.
3. A contact rectangular duct section flow velocity distribution measuring apparatus according to claim 2, wherein a pointer (A5) for indicating the amount of spring expansion and contraction is provided on the connecting rod (A6).
4. The device for measuring the flow velocity distribution of the cross section of the rectangular contact air duct according to claim 2, wherein a connecting rod protecting tube (A3) is arranged at one end, far away from the spring (A1), of the spring protecting tube (A2), and the connecting rod protecting tube is coaxially sleeved outside the connecting rod.
5. A contact rectangular duct section flow velocity distribution measuring apparatus according to any one of claims 1 to 4, wherein the plane of the resistance plate (A4) and the cross section of the support tube (1) are arranged parallel to each other.
6. A contact rectangular duct section flow velocity distribution measuring apparatus according to any one of claims 1 to 4, wherein at least 5 flow velocity converters (a) are arranged in the cross-sectional flow velocity field, and at least one flow velocity converter is installed at the center of the support tube (1).
7. A contact rectangular duct section flow velocity distribution measuring apparatus according to any one of claims 1 to 4, wherein the flow velocity converters located in the areas outside the center of the support tube are installed in a mutually symmetrical manner.
8. A contact rectangular duct section flow velocity distribution measuring apparatus according to any one of claims 1 to 4, wherein the support frame (2) is formed by at least two support bars intersecting each other.
9. A contact rectangular duct section flow velocity distribution measuring apparatus according to any one of claims 1 to 4, wherein the outer side of the wall of the spring casing (A2) is provided with a size scale value.
10. The device for measuring the cross-sectional flow velocity distribution of a rectangular contact air duct according to any one of claims 1 to 4, wherein the support tube (1) is made of organic glass, and flanges for connecting with the air duct (B) are respectively arranged at both ends of the support tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322392223.4U CN220625390U (en) | 2023-09-04 | 2023-09-04 | Contact type rectangular air duct section flow velocity distribution measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322392223.4U CN220625390U (en) | 2023-09-04 | 2023-09-04 | Contact type rectangular air duct section flow velocity distribution measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220625390U true CN220625390U (en) | 2024-03-19 |
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ID=90235553
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322392223.4U Active CN220625390U (en) | 2023-09-04 | 2023-09-04 | Contact type rectangular air duct section flow velocity distribution measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220625390U (en) |
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2023
- 2023-09-04 CN CN202322392223.4U patent/CN220625390U/en active Active
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