CN211346911U - Square air quantity and air pressure measuring valve special for ventilation and air conditioner - Google Patents
Square air quantity and air pressure measuring valve special for ventilation and air conditioner Download PDFInfo
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- CN211346911U CN211346911U CN202020290750.8U CN202020290750U CN211346911U CN 211346911 U CN211346911 U CN 211346911U CN 202020290750 U CN202020290750 U CN 202020290750U CN 211346911 U CN211346911 U CN 211346911U
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Abstract
The utility model relates to the technical field of air quantity and air pressure measurement, in particular to a square air quantity and air pressure measurement valve special for ventilation and air conditioning, which comprises a square valve body, a measuring sheet, a fixing frame and an air pipe connecting piece; the measuring pieces are fixed in the valve body in a front-back mode, the space in the valve body is divided into a plurality of grid shapes, the total pressure holes of the measuring pieces face the windward end of the valve body, and the total pressure average pipe and the static pressure average pipe of each measuring piece are connected with the air quantity and air pressure display instrument through the air pipe connecting piece. The utility model meets the national standard precision requirement according to the national standard measuring point and the technical requirement, is suitable for the one-time measurement of the air quantity and the air pressure in the maintenance of the smoke prevention and exhaust system on the construction site, and has convenient and rapid detection process and accurate and reliable detection result; the device is suitable for measuring square air ducts and fans of different sizes. The production and manufacturing process is simple and convenient, and the parts can be assembled according to actual needs after being produced in batches, so that the waste of finished products is avoided.
Description
Technical Field
The utility model relates to an amount of wind pressure measures technical field, specifically, relates to ventilation and dedicated square amount of wind pressure measurement valve of air conditioner.
Background
The ventilation and air-conditioning system only has detection equipment with laboratory or laboratory precision requirements at present, the constant-speed pipe detector in the market mainly focuses on detection of chemical, petroleum and other liquid fluids, and does not completely meet the precision requirements of GB/T50243-2016 and GB51251-2016 and a special air volume and air pressure measuring tool arranged at a measuring point position, although a laboratory-level pitot tube is adopted for detecting the air volume and the air pressure of the ventilation and air-conditioning system, when the detecting point position is too much or is limited by the installation position of some fans and other reasons, the detection cannot be realized or the daily maintenance cannot be carried out according to the standard requirement (9.0.3 in GB51251-2016 requires that the fan system is subjected to one-time performance detection including the air volume and the air pressure every quarter), the workload and the working difficulty (the installation position of some fans cannot be detected by the existing pitot tube method), even if the national standard has requirements, the practical operation can not be realized, so that a square air volume and air pressure measuring valve special for ventilation and air conditioning, which can carry out practical and convenient detection and can meet the precision requirements of GB/T50243-2016 and GB51251-2016, is urgently needed.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a square air quantity and pressure measuring valve special for ventilation and air conditioning, which comprises a square valve body, a measuring sheet, a fixing frame and an air pipe connecting piece; the measuring piece comprises a vertical measuring piece and a horizontal measuring piece, wherein a total pressure average pipe and a static pressure average pipe are arranged on the vertical measuring piece, a plurality of total pressure holes are formed in the total pressure average pipe, a plurality of static pressure holes are formed in the static pressure average pipe, the vertical measuring piece and the horizontal measuring piece are identical in structure, the total pressure holes of the vertical measuring piece and the horizontal measuring piece are opposite to the windward end of the valve body, one end of the measuring piece is fixedly connected with the valve body through a fixing frame, and the other end of the measuring piece is fixedly connected with the valve body through an air pipe connecting piece;
the fixed frame is a V-shaped frame, the end parts of two branches of the V-shaped frame are respectively plugged and fixedly connected with one ends of the static pressure average pipe and the total pressure average pipe on the measuring sheet, and the other end part of the V-shaped frame is fixedly connected with the inner wall of the valve body;
the trachea connecting piece includes two connecting pipes, and the one end of two connecting pipes is fixed and communicates with the one end of always pressing average pipe, static pressure average pipe respectively, the other end of connecting pipe run through the valve body and with valve body fixed connection, the connecting pipe spills the outer one end fixedly connected with air pipe connector of valve body, air pipe connector is through measuring the trachea and connecting amount of wind pressure display instrument.
Preferably, the vertical measuring pieces and the horizontal measuring pieces are distributed in the valve body in a front-back mode, the internal space of the valve body is divided into a plurality of grids, one end of each pressure hole is communicated with the total pressure averaging tube, the other end of each pressure hole penetrates through the windward end of each measuring piece, the direction of each static pressure hole is perpendicular to the total pressure holes, the static pressure holes are communicated with the static pressure averaging tubes, the two ends of each static pressure hole penetrate through the upper side face and the lower side face of each measuring piece corresponding to the static pressure averaging tubes, the static pressure holes correspond to the total pressure holes one to one, the corresponding static pressure holes are coplanar with the total pressure holes, and the measuring pieces are further provided with temperature compensation tubes.
Preferably, the total pressure holes and the static pressure holes are distributed according to the requirement of GB/T1236-2017 air quantity and air pressure detection positions.
Preferably, the total pressure holes and the static pressure holes are distributed according to the requirement of GB/T50243-2016 wind pressure detection position.
Preferably, the total pressure holes and the static pressure holes are distributed according to the requirement of GB51251-2017 wind pressure detection positions.
Preferably, the measuring sheet is an aluminum profile.
The utility model discloses still including other subassemblies that can make ventilation and air conditioner dedicated square amount of wind pressure measurement valve normal use, the amount of wind pressure display appearance that connects through measuring the trachea like the air pipe connector, temperature compensation arrangement etc. is the conventional technical means in this area. Additionally, the utility model discloses in add the device or the subassembly of injecing and all adopt the conventional technical means in this field, like air pipe joint, mounting hole, connecting pipe, amount of wind pressure display instrument, temperature-compensated equipment etc. all adopt the conventional technical means in this field.
The utility model discloses an operating principle is, mainly utilizes the sample that the test film realized the wind pressure, then according to the cross-sectional area automatic calculation amount of wind pressure numerical value in actual fan and wind channel and provide and maintain and alarm system, and measurement accuracy reaches-5% -10% according to the national standard requirement, belongs to the normal use precision, belongs to the scope that the national standard required. Firstly, the shape and size of the required valve body are determined according to the cross sectional areas of the actual fan and the air duct, then the positions of the measuring points in the fan or the air duct are determined according to the national standard requirements of square fan detection and air duct detection (the total pressure hole and the static pressure hole are made according to the requirements of the national standard GB/T1236-2017, GB50243-2016 or GB51251-2017 on the position of the wind pressure measuring point), the measuring sheets are reasonably distributed according to the positions of the measuring points, holes (static pressure holes and total pressure holes) are punched on the measuring sheets corresponding to the positions of the measuring points, the measuring sheets with the holes are fixed on the valve body, the valve body is arranged at the corresponding position of a detection air duct or a fan, then the air pipe joints of the static pressure average pipe and the total pressure average pipe of each detection piece are connected with an air quantity and air pressure display instrument through a measurement air pipe, and the existing mature air quantity and air pressure instrument can be used for directly measuring data or realizing online real-time monitoring; in the detection process, the original square air volume and air pressure measuring valve special for ventilation and air conditioning sequentially detects point by point and then averagely calculates to obtain a detection result, the detection result is converted into data for simultaneously measuring each measuring point at one time, each average pressure is directly obtained by using a total pressure average pipe and a static pressure average pipe, a conclusion is obtained once after the summary, the result is within an error range of 5-10% meeting the use specification requirement, the online detection is very easy to realize, and a temperature compensation device can be added when the requirement on the detection result is strict, so that the accuracy of the detection result is improved.
The utility model has the advantages that the accuracy requirements of GB/T50243-2016 and GB51251-2016 are met according to the measuring point and the technical requirements of GB/T1236-2017, the device is suitable for one-time measurement of air quantity and air pressure in maintenance of a smoke prevention and exhaust system on a construction site, the detection process is convenient and rapid, and the detection result is accurate and reliable; the detection accuracy can be correspondingly improved by setting temperature compensation according to the requirement; the wind speed and the wind volume can be accurately measured at one time, and manpower and material resources are saved; the device is suitable for measuring square air ducts and fans of different sizes, and has a wide application range. After the parts can be produced in batches, the parts are assembled according to actual needs, so that waste of finished products is avoided.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic structural diagram in an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
fig. 3 is a distribution diagram of measuring points of the square air duct to be measured in the embodiment of the present invention.
In the figure: 1. the device comprises a valve body, 2. a measuring piece, 3. a fixing frame, 4. a connecting pipe, 5. a total pressure hole, 6. a static pressure hole, 7. an air pipe joint, 8. a total pressure average pipe, 9. a static pressure average pipe, 10. a measuring air pipe, 11. a temperature compensation pipe and 12. an air quantity and air pressure display instrument.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings and specific embodiments in the embodiments of the present invention, and the description herein is only for explaining the present invention, but not for limiting the present invention. Based on the embodiments of the present invention, any modifications, equivalent replacements, improvements, etc. made by other embodiments obtained by those skilled in the art without creative efforts should be included in the protection scope of the present invention.
Examples
As shown in fig. 1-3, the utility model provides a square air volume and pressure measuring valve special for ventilation and air conditioning, which comprises a square valve body 1, a measuring piece 2, a fixing frame 3 and an air pipe connecting piece; the measuring piece 2 comprises a vertical measuring piece and a horizontal measuring piece, wherein a total pressure average pipe 8 and a static pressure average pipe 9 are arranged on the vertical measuring piece, a plurality of total pressure holes 5 are arranged on the total pressure average pipe 8, a plurality of static pressure holes 6 are arranged on the static pressure average pipe 9, the vertical measuring piece and the horizontal measuring piece are identical in structure, the total pressure holes 5 of the vertical measuring piece and the horizontal measuring piece are opposite to the windward end of the valve body 1, one end of the measuring piece 2 is fixedly connected with the valve body 1 through a fixing frame 3, and the other end of the measuring piece is fixedly connected with the valve body 1 through an air pipe connecting piece;
the fixed frame 3 is a V-shaped frame, the end parts of two branches of the V-shaped frame are respectively plugged and fixedly connected with one ends of the static pressure average pipe 9 and the total pressure average pipe 8 on the measuring piece 2, and the other end part of the V-shaped frame is fixedly connected with the inner wall of the valve body 1;
the trachea connecting piece includes two connecting pipes 4, and the one end of two connecting pipes 4 is fixed and the intercommunication with the one end of always pressing average pipe 8, static pressure average pipe 9 respectively, the other end of connecting pipe 4 run through valve body 1 and with 1 fixed connection of valve body, connecting pipe 4 spills the outer one end fixedly connected with air pipe connector 7 of valve body 1, air pipe connector 7 is through measuring trachea 10 and connecting amount of wind pressure display instrument 12.
The plurality of vertical measuring pieces and the plurality of horizontal measuring pieces are distributed in the valve body 1 in a front-back mode, the inner space of the valve body 1 is divided into a plurality of grids, one end of each pressure hole 5 is communicated with the corresponding pressure averaging tube 8, the other end of each pressure hole penetrates through the windward end of the measuring piece 2, the direction of each pressure hole 6 is perpendicular to the corresponding pressure hole 5, each pressure hole 6 is communicated with the corresponding pressure averaging tube 9, the two ends of each pressure hole 6 penetrate through the upper side face and the lower side face of the corresponding measuring piece 2 corresponding to the corresponding pressure averaging tube 9, the pressure holes 6 correspond to the pressure holes 5 one to one, the corresponding pressure holes 6 are coplanar with the pressure holes 5, and the measuring piece 2 is further provided with a temperature compensation tube 11.
And the total pressure holes 5 and the static pressure holes 6 are distributed according to the requirement of GB/T1236-2017 air quantity and air pressure detection positions.
The total pressure holes 5 and the static pressure holes 6 are distributed according to the requirement of GB/T50243-2016 wind pressure detection positions.
And the total pressure holes 5 and the static pressure holes 6 are distributed according to the requirement of GB51251-2017 wind pressure detection positions.
The measuring sheet is an aluminum profile.
When the wind pressure measuring device is used, the positions of measuring points in an air channel are determined according to the national standard GB/T50243 wind pressure measuring point positions shown in figure 3 by combining with the actually required area of the measured air channel, the vertical measuring sheet and the horizontal measuring sheet are vertically distributed in the square valve body 1 according to the distribution of the measuring points, then the positions of total pressure holes 5 and static pressure holes 6 on the horizontal measuring sheet and the vertical measuring sheet are determined to be matched with the measuring points, the valve body 1 with the fixed measuring sheet 2 is arranged on the air channel to be measured, the windward end of each measuring sheet 2 is opposite to the air inlet direction of the air channel, the air pipe joints of the static pressure average pipe 9 and the total pressure average pipe 8 of each measuring sheet 2 are respectively connected with an external wind volume wind pressure display instrument through a measuring air pipe 10, the air pipe joints are connected with a mature wind volume measuring instrument (a wind volume display instrument 12) on the market through measuring air pipes, and then the wind pressure coefficient provided by the company is calculated according to obtain the wind volume (the calculation coefficient of the wind The measuring device is divided into:
1. dividing the cross section area into an inner half and an outer half by 500 coefficients, an inner half and an outer half by 750 coefficients, an inner half and an outer half by 1000 coefficients, an inner half and an outer half by 1250 coefficients and an inner half by 1500 coefficients;
2. selecting a correction coefficient according to the designed air volume and the designed air pressure: designing a correction coefficient of the wind speed more than or equal to 7 m/s; designing a wind speed correction coefficient of 5-7 m/s; and designing a wind speed correction coefficient of 0-5 m/s.
3. Temperature compensation selected according to accuracy requirements: whether to add a temperature measurement sensing is determined by the customer to the precision required by the design institute). And can also be directly linked with an online detection alarm system. The data can be directly measured by utilizing the existing mature wind volume and wind pressure instruments.
The foregoing description of the embodiments of the invention has been presented for purposes of illustration and not limitation, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. Ventilation and dedicated square amount of wind pressure measurement valve of air conditioner, its characterized in that: comprises a square valve body, a measuring sheet, a fixing frame and an air pipe connecting piece; the measuring piece comprises a vertical measuring piece and a horizontal measuring piece, wherein a total pressure average pipe and a static pressure average pipe are arranged on the vertical measuring piece, a plurality of total pressure holes are formed in the total pressure average pipe, a plurality of static pressure holes are formed in the static pressure average pipe, the vertical measuring piece and the horizontal measuring piece are identical in structure, the total pressure holes of the vertical measuring piece and the horizontal measuring piece are opposite to the windward end of the valve body, one end of the measuring piece is fixedly connected with the valve body through a fixing frame, and the other end of the measuring piece is fixedly connected with the valve body through an air pipe connecting piece;
the fixed frame is a V-shaped frame, the end parts of two branches of the V-shaped frame are respectively plugged and fixedly connected with one ends of the static pressure average pipe and the total pressure average pipe on the measuring sheet, and the other end part of the V-shaped frame is fixedly connected with the inner wall of the valve body;
the trachea connecting piece includes two connecting pipes, and the one end of two connecting pipes is fixed and communicates with the one end of always pressing average pipe, static pressure average pipe respectively, the other end of connecting pipe run through the valve body and with valve body fixed connection, the connecting pipe spills the outer one end fixedly connected with air pipe connector of valve body, air pipe connector is through measuring the trachea and connecting amount of wind pressure display instrument.
2. The special square air volume and pressure measuring valve for the ventilation and air conditioning as claimed in claim 1, wherein: the vertical measuring pieces and the horizontal measuring pieces are distributed in the valve body in a front-back mode, the inner space of the valve body is divided into a plurality of grids, one end of each pressure hole is communicated with the total pressure averaging tube, the other end of each pressure hole penetrates through the windward end of each measuring piece, the direction of each static pressure hole is perpendicular to the total pressure holes, the static pressure holes are communicated with the static pressure averaging tubes, the two ends of each static pressure hole penetrate through the upper side face and the lower side face of each measuring piece corresponding to the static pressure averaging tubes, the static pressure holes correspond to the total pressure holes in a one-to-one mode, the corresponding static pressure holes are coplanar with the total pressure holes, and a temperature compensation tube is further arranged.
3. The special square air volume and pressure measuring valve for the ventilation and air conditioning as claimed in claim 1, wherein: and the total pressure holes and the static pressure holes are distributed according to the requirement of GB/T1236-2017 air quantity and air pressure detection positions.
4. The special square air volume and pressure measuring valve for the ventilation and air conditioning as claimed in claim 1, wherein: the total pressure holes and the static pressure holes are distributed according to the requirement of GB/T50243-2016 wind pressure detection positions.
5. The special square air volume and pressure measuring valve for the ventilation and air conditioning as claimed in claim 1, wherein: and the total pressure holes and the static pressure holes are distributed according to the requirement of GB51251-2017 wind pressure detection positions.
6. The special square air volume and pressure measuring valve for the ventilation and air conditioning as claimed in claim 1, wherein: the measuring sheet is an aluminum profile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020290750.8U CN211346911U (en) | 2020-03-11 | 2020-03-11 | Square air quantity and air pressure measuring valve special for ventilation and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020290750.8U CN211346911U (en) | 2020-03-11 | 2020-03-11 | Square air quantity and air pressure measuring valve special for ventilation and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN211346911U true CN211346911U (en) | 2020-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020290750.8U Active CN211346911U (en) | 2020-03-11 | 2020-03-11 | Square air quantity and air pressure measuring valve special for ventilation and air conditioner |
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| Country | Link |
|---|---|
| CN (1) | CN211346911U (en) |
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2020
- 2020-03-11 CN CN202020290750.8U patent/CN211346911U/en active Active
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