CN1049284C - Pressure guiding device for online monitoring of air quantity of ventilator and monitoring method thereof - Google Patents
Pressure guiding device for online monitoring of air quantity of ventilator and monitoring method thereof Download PDFInfo
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- CN1049284C CN1049284C CN 94111460 CN94111460A CN1049284C CN 1049284 C CN1049284 C CN 1049284C CN 94111460 CN94111460 CN 94111460 CN 94111460 A CN94111460 A CN 94111460A CN 1049284 C CN1049284 C CN 1049284C
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000009423 ventilation Methods 0.000 claims description 22
- 238000009530 blood pressure measurement Methods 0.000 claims description 17
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000003068 static effect Effects 0.000 description 9
- 238000009434 installation Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention relates to a pressure guiding device and a method for online monitoring of a ventilator. The pressure leading device comprises a pressure equalizing pipe with the same shape as the section of the air duct, the pressure equalizing pipe is fixed on the wall surface of the wind tunnel of the air duct through a fixing frame, a plurality of pressure measuring heads are arranged on the pressure equalizing pipe, the pressure measuring heads are perpendicular to the section of the air duct, the end heads of the pressure measuring heads face the incoming flow direction, pressure signals in the pressure equalizing pipe are led out through a pressure measuring leading-out guide pipe, and a water drain valve is arranged at the lowest position of the pressure equalizing pipe. And respectively arranging a set of pressure guiding devices at two ends of a flow passage zooming section of the ventilator inlet or outlet air passage, respectively measuring the pressure of the two sections, obtaining the differential pressure value of the two sections, and obtaining the air volume. The invention has high measurement precision.
Description
The present invention relates to a kind of parameter test device and method thereof of blower performance, the particularly pressure-inducting device of ventilation blower air quantity on-line monitoring and monitoring method thereof.
The key problem in technology of ventilator performance parameters on-line monitoring is the on-line monitoring of air quantity.Patent Office of the People's Republic of China disclosed " a kind of test method of ventilator performance parameters " of Li Dongyang invention on September 29th, 1993, publication number: CN1076782A, this method is on the section several static openings to be set by going into, export at ventilation blower in air channel and the ventilation blower shell, and gaging hole links to each other with sensor or testing tool by conduit.There are following 2 deficiencies in this method: 1. go into, export several static openings are set on air channel and the body fuselage at ventilation blower, the static pressure of the sensitive just nearly wall boundary layer of respective cross-section, have only and work as
During for constant, the static pressure of nearly wall boundary layer could equate with turbulent core district static pressure on the respective cross-section (R be on the cross section any point apart from the distance at center, air channel).Because the Fan Inlet main flow of gas is vertically, but still exist radially the secondary main flow and along circumferential curling up in advance; Also there is radial diffusion in the ventilation blower exit flow, circumferentially curls up and axial main flow, and therefore, ventilation blower goes into, export all to belong to the ternary flow field, and then closely the static pressure of wall boundary layer is not equal to the center static pressure; 2. in eddy flow field is arranged, bernoulli equation can only be set up by the longshore current line, if the static pressure substitution bernoulli equation (streamline) of only ventilation blower being gone into, export and with flow Q that continuity equation (always flowing) simultaneous solution goes out be not the real traffic of ventilation blower.
Patent Office of the People's Republic of China disclosed " flow measurement device for industrial pipeline gas " of Yao Qun invention on October 30th, 1991, publication number: CN1055815A, this device places flow conduit to be measured by the pressure-measuring head that contraction shape hydraucone segment of curve and through hole straight length combine, by pressure-measuring head straight length inside surface static pressure P
1Static pressure P with the industrial pipeline relevant position
2Calculate flow in the pipeline.In order not influence the pipe interior flow field, shrink shape hydraucone pressure-measuring head size and must do very for a short time, in order to avoid increase resistance, and measuring-signal P
2-P
1Value but is proportional to the area ratio of pressure-measuring head hydraucone and straight length.Amass 10 for duct cross-section
2About mine ventilation wind cave system, this device exists the fixing difficulty of supporting, range of signal is little, measuring accuracy is poor.
The object of the present invention is to provide a kind of pressure-inducting device and monitoring method thereof that is applicable to mine ventilation dust-laden, humidity, ventilation blower air quantity on-line monitoring that gas is big, measuring accuracy height of the present invention, simple in structure, easy for installation.
Purpose of the present invention can realize in the following manner: a kind of pressure-inducting device of ventilation blower air quantity on-line monitoring, include the balance pipe identical with the duct cross-section shape, it is fixed on the wind cave wall in air channel by fixed mount, be mounted with several pressure-measuring heads on the balance pipe, pressure-measuring head is perpendicular to duct cross-section, and the termination facing the wind come flow path direction, one end of pressure measurement extraction catheter communicates with balance pipe, the other end passes wind cave wall the blast in the balance pipe is drawn, and is mounted with water drain valve at the lowest part of balance pipe.
Described pressure-measuring head includes the pressure measurement body of rod of hollow, and its front end has a profile to be the pressure measuring rod head of fairing, and the rear end is mounted with the pressure measurement pole socket of hollow, radially has the pressure tap that communicates with its inner chamber in pressure measurement body of rod upper edge.
The described pressure tap of being opened on the pressure measurement body of rod is no less than 3, and is uniformly distributed on the same cross section.
A kind of ventilation blower air quantity on-line monitoring method, in the runner drastic change link in Fan Inlet or outlet air channel, promptly the two ends of convergent-divergent section are provided with pressure-inducting device respectively, record the pressure difference between two sections, according to mathematical model, try to achieve the flow of blower fan.
The present invention compared with prior art has following advantage: the present invention guarantees that the pressure signal is a center fluid field pressure signal, thereby has improved measuring accuracy greatly because pressure tap has taken into full account the influence to the pressure precision of border, balance pipe on choosing.Pressure-inducting device is simple in structure in addition, manufacturing cost is low.Pressure-measuring head and balance pipe are convenient to safeguard for being threaded.Monitoring method is simple, reliable, the long-term on-line monitoring of particularly suitable blower performance test and running status.
Description of drawings:
Accompanying drawing 1 is the structural drawing of the pressure-inducting device of ventilation blower air quantity on-line monitoring.
Accompanying drawing 2 is structural drawing of pressure-measuring head of the pressure-inducting device of ventilation blower air quantity on-line monitoring.
Accompanying drawing 3 is pressure-inducting device arrangenent diagrams in the air channel of ventilation blower air quantity on-line monitoring.
The invention will be further described with reference to the accompanying drawings:
Shown in accompanying drawing 1,2: Fig. 1,2 has showed the structural drawing of the pressure-inducting device of ventilation blower air quantity on-line monitoring.A kind of pressure-inducting device of ventilation blower air quantity on-line monitoring includes balance pipe 2, makes with galvanized conduit or stainless-steel tube or steel pipe, and it is identical with the duct cross-section shape that balance pipe 2 is made, if duct cross-section is square, then balance pipe 2 is made square; If duct cross-section is circular, then balance pipe 2 is made circular.Balance pipe 2 is fixed on by fixed mount 4 on the wind cave wall 6 in air channel, and balance pipe 2 is not less than 100mm with the distance of wind cave wall 6, and the number of being won the confidence is that equal pressure signal is flowed in the center to guarantee.Be mounted with several pressure-measuring heads 3 on the balance pipe 2, pressure-measuring head 3 is perpendicular to duct cross-section, and the termination of pressure-measuring head 3 facing the wind come flow path direction.Described pressure-measuring head 3 includes the pressure measurement body of rod 3-3 of hollow in a tubular form, radially has the pressure tap 3-2 that communicates with inner chamber on pressure measurement body of rod 3-3, and the pressure tap 3-2 that is opened is no less than 3, and is uniformly distributed on the same cross section.Its front end of pressure measurement body of rod 3-3 has a profile to be a pressure measuring rod 3-1 of fairing, and the purpose that a pressure measuring rod 3-1 makes fairing is to reduce resistance, does not destroy the pressure flow field of the pressure tap 3-2 that is positioned at thereafter.Pressure tap 3-2 is not less than 100mm apart from the distance of balance pipe 2, with avoid pressure tap 3-2 the number of being won the confidence the flow field of being surveyed is disturbed by balance pipe 2 frameworks, improve the pressure precision.The rear end of pressure measurement body of rod 3-3 is connected with the pressure measurement pole socket 3-4 of mesopore, gauge head 3 can be placed on the balance pipe 2 by pressure measurement pole socket 3-4.The pressure-measuring head of settling on balance pipe 23 is no less than 4, and is distributed in symmetrically and evenly on the balance pipe 2.One end of pressure measurement extraction catheter 1 communicates with balance pipe 2, and the other end passes wind cave wall 6 blast in the balance pipe 2 is drawn.Lowest part at balance pipe 2 is mounted with water drain valve 5.Regularly open water drain valve 5, the water in the discharging balance pipe 2 guarantees that pressure-inducting device can operate as normal.
Shown in accompanying drawing 3: Fig. 3 has showed the installation site figure of pressure-inducting device in the air channel of ventilation blower air quantity on-line monitoring.Runner drastic change link in Fan Inlet or outlet air channel, the two ends that are convergent-divergent section 7 are provided with pressure-inducting device 8 respectively, thereby can record the pressure at convergent-divergent section 7 two ends respectively, thereby can obtain that pressing of two sections is worth in the air channel, according to the mathematical model of setting up, try to achieve the flow of blower fan.
Claims (11)
1. the pressure-inducting device of a ventilation blower air quantity on-line monitoring, it is characterized in that: include the balance pipe (2) identical with the duct cross-section shape, it is fixed on the wind cave wall (6) in air channel by fixed mount (4), be mounted with several pressure-measuring heads (3) on the balance pipe (2), pressure-measuring head (3) is perpendicular to duct cross-section, and the termination facing the wind come flow path direction, one end of pressure measurement extraction catheter (1) communicates with balance pipe (2), the other end passes wind cave wall (6) blast in the balance pipe (2) is drawn, and is mounted with water drain valve (5) at the lowest part of balance pipe (2).
2. pressure-inducting device according to claim 1, it is characterized in that: described pressure-measuring head (3) includes the pressure measurement body of rod (3-3) of hollow, its front end has a profile to be the pressure measuring rod head (3-1) of fairing, the rear end is mounted with the pressure measurement pole socket (3-4) of hollow, radially has the pressure tap (3-2) that communicates with its inner chamber on the pressure measurement body of rod (3-3).
3. pressure-inducting device according to claim 2 is characterized in that: the described pressure tap of being opened on the pressure measurement body of rod (3-3) (3-2) is no less than 3, and is uniformly distributed on the same cross section.
4. according to claim 2 or 3 described pressure-inducting devices, it is characterized in that: described pressure tap (3-2) is not less than 100mm apart from the distance of balance pipe (2).
5. according to claim 1,2 or 3 described pressure-inducting devices, it is characterized in that: described balance pipe (2) is gone up the pressure-measuring head of settling (3) and is no less than 4, and is distributed in symmetrically and evenly on the balance pipe (2).
6. pressure-inducting device according to claim 4 is characterized in that: described balance pipe (2) is gone up the pressure-measuring head of settling (3) and is no less than 4, and is distributed in symmetrically and evenly on the balance pipe (2).
7. according to claim 1,2 or 3 described pressure-inducting devices, it is characterized in that: described balance pipe (2) is not less than 100mm with the distance of wind cave wall (6).
8. pressure-inducting device according to claim 4 is characterized in that: described balance pipe (2) is not less than 100mm with the distance of wind cave wall (6).
9. pressure-inducting device according to claim 5 is characterized in that: described balance pipe (2) is not less than 100mm with the distance of wind cave wall (6).
10. pressure-inducting device according to claim 6 is characterized in that: described balance pipe (2) is not less than 100mm with the distance of wind cave wall (6).
11. ventilation blower air quantity on-line monitoring method, it is characterized in that: runner drastic change link in Fan Inlet or outlet air channel, the two ends that are convergent-divergent section (7) are provided with a cover pressure-inducting device (8) respectively, record the pressure of two sections respectively, draw the pressure difference between two sections, thereby can try to achieve air quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111460 CN1049284C (en) | 1994-09-30 | 1994-09-30 | Pressure guiding device for online monitoring of air quantity of ventilator and monitoring method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94111460 CN1049284C (en) | 1994-09-30 | 1994-09-30 | Pressure guiding device for online monitoring of air quantity of ventilator and monitoring method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1119728A CN1119728A (en) | 1996-04-03 |
| CN1049284C true CN1049284C (en) | 2000-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94111460 Expired - Fee Related CN1049284C (en) | 1994-09-30 | 1994-09-30 | Pressure guiding device for online monitoring of air quantity of ventilator and monitoring method thereof |
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| CN (1) | CN1049284C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013097216A1 (en) * | 2011-12-31 | 2013-07-04 | 中山大洋电机股份有限公司 | Structure for automatically adjusting pressure-measuring port of blower |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353407A (en) * | 2011-10-11 | 2012-02-15 | 山东电力研究院 | Gas flow measuring device |
| CN102878652A (en) * | 2012-10-24 | 2013-01-16 | 苏州霍尼奥科空调设备有限公司 | Novel flow-measurement air outlet terminal |
| JP2018511790A (en) * | 2015-02-26 | 2018-04-26 | ドワイヤー インスツルメンツ，インコーポレイテッド | Airflow hood |
| CN105737913B (en) * | 2016-02-26 | 2018-11-16 | 中钢集团马鞍山矿山研究院有限公司 | A kind of device and method of indirect determination mine return air well air quantity |
| CN108168628A (en) * | 2018-02-02 | 2018-06-15 | 安徽理工大学 | A kind of New type ventilator airflow pressure measuring device |
-
1994
- 1994-09-30 CN CN 94111460 patent/CN1049284C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013097216A1 (en) * | 2011-12-31 | 2013-07-04 | 中山大洋电机股份有限公司 | Structure for automatically adjusting pressure-measuring port of blower |
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| Publication number | Publication date |
|---|---|
| CN1119728A (en) | 1996-04-03 |
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