CN201043906Y - Bridge type single-hole orifice plate flowmeter - Google Patents
Bridge type single-hole orifice plate flowmeter Download PDFInfo
- Publication number
- CN201043906Y CN201043906Y CNU2007200907283U CN200720090728U CN201043906Y CN 201043906 Y CN201043906 Y CN 201043906Y CN U2007200907283 U CNU2007200907283 U CN U2007200907283U CN 200720090728 U CN200720090728 U CN 200720090728U CN 201043906 Y CN201043906 Y CN 201043906Y
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- bridge
- orifice plate
- tube
- type single
- orifice
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Abstract
The utility model discloses a bridge-type single hole plate flow meter, which comprises straight pipes; wherein, the hole plate is arranged in the straight pipes; the walls of the straight pipes at the both sides of the hole plate are respectively provided with a measuring pipe; the straight pipe is connected with a bridge pipe in series; the inner cavities of the straight pipe and the bridge pipe are communicated mutually; the connecting points of the straight pipe and the bridge pipe are respectively located at the outer side of the two measuring pipes; and the an on-off control is arranged on the bridge pipe. The utility model has a simple structure, reasonable designe, and can solve negative pressure losses caused by the gas drainage system of a mine due to throttling, and effectively improve gas drainage effects. In addition, the utility model has a wide scope for promoting, can be promoted extensively, and has good social and economic benefits.
Description
One, technical field:
The utility model relates to pipeline gas flow under a kind of gage well, negative pressure, the isoparametric safety measuring equipment of pressure reduction, particularly relates to a kind of bridge-type single hole orifice flowmeter.
Two, background technology:
Utilize the orifice plate throttling technology to measure in the pipeline gas flow comparative maturity at present, its measurement mechanism mainly is the orifice plate that is contained on the pipeline transversal section, its principle is to utilize throttling pore to make the orifice plate front and back form pressure reduction, utilize pressure reduction to calculate flow, in long-term use, discovery has following defective: because of the orifice plate throttling, produce the bigger pressure loss, reduce the emission effect of gas, reach good drawing-off gas effect, need to strengthen investment and increase energy consumption, correspondingly increase the operating cost of enterprise.
Three, utility model content:
Technical problem to be solved in the utility model: overcome the deficiencies in the prior art, provide a kind of design to close
Reason, simple in structure, can reduce because throttling action causes negative pressure loss to pipeline and improves the bridge-type single hole orifice flowmeter of gas pumping effect.
The technical solution of the utility model is: a kind of bridge-type single hole orifice flowmeter, contain straight tube, in the described straight tube orifice plate is installed, a measuring tube is set respectively on the straight pipe wall of these orifice plate both sides, a described straight tube and parallel a connection of bridge tube, the two inner chamber is interconnected, and two tie points of described straight tube and bridge tube lay respectively at the outside of two measuring tubes, a keying of installation operation valve on the described bridge tube.
The rectangle that is shaped as openings at one side of described bridge tube, or be the square of openings at one side, or be the trapezoidal of bottom opening.Described keying operation valve is a ball valve.
The measuring tube center of described inlet end and the distance of orifice plate center line equal the orifice plate internal diameter, and the measuring tube center of described outlet side and the distance of orifice plate center line equal half of orifice plate internal diameter.
Described orifice plate internal diameter equals half of orifice plate external diameter; And the orifice plate endoporus is made up of cylindrical hole and truncated cone hole, and wherein, the orifice plate endoporus of inlet end is a cylindrical hole, and the orifice plate endoporus of outlet side is outside diffused truncated cone hole.The coning angle of described conical bore is 90 °.
Described orifice plate external diameter is any among 15.24mm, 20.32mm, 25.40mm, 38.00mm, the 50.80mm.
Described bridge tube internal diameter and straight tube internal diameter are complementary; Described orifice plate is that red metal plate or the corrosion resistant plate of 3.0mm made by thickness.Described straight tube two ends are respectively arranged with anti-tripping, are convenient to firmly be connected with other pipelines.
The beneficial effects of the utility model are:
1, mainly to act on be that pipeline gas flow under the gage well, negative pressure, pressure reduction are isoparametric to the utility model, bridge tube of parallel connection on its straight tube, when needing reading by closing the keying operation valve on the bridge tube, utilize the throttling action of fluid by orifice, flow velocity is increased, pressure reduces, and causes orifice plate front and back pressure difference, as the foundation of measuring; Do not open the keying operation valve on the bridge tube during reading, utilize the bridge-type shunting action, effectively improved the gas drainage effect to reduce the loss of gas drainage negative pressure.
2, the utility model is reasonable in design, simple in structure, utilizes the bridge-type shunting principle to realize survey measurements and direct through-flow neglecting neither, and uses very convenient.
3, the utility model has reduced because throttling action causes the negative pressure loss to pipeline, and energy savings reduces the enterprise operation cost, improves its economic benefit.
4, the utility model is applied widely, can be applicable to the detection and the circulation of gas flow rate in the multiple pipeline, particularly is applicable to the detection and the extraction of coal-mine gas, is easy to promote, and has good society and economic benefit.
Four, description of drawings:
Accompanying drawing is a bridge-type single hole orifice flowmeter.
Five, embodiment:
Embodiment one: referring to accompanying drawing, among the figure, in the straight tube 1 of bridge-type single hole orifice flowmeter orifice plate 3 is installed, a measuring tube 3 is set respectively on the straight pipe wall of these orifice plate 2 both sides, straight tube 1 and 4 parallel connections an of bridge tube, the two inner chamber is interconnected, and two tie points of straight tube 1 and bridge tube 4 lay respectively at the outside of two measuring tubes 3, a keying of installation operation valve 5 on the bridge tube 4.The rectangle that is shaped as openings at one side of bridge tube 4.Opening and closing operation valve 5 is ball valve.
Its manufacturing process is: (1). process orifice plate 2, straight tube 1, measuring tube 3 and bridge tube 4 by designing requirement; (2) orifice plate 2 is embedded the position that straight tube 1 designs; (3) measuring tube 3 is welded on the predetermined aperture; (4) will open and close operation valve 5 installs on the bridge tube 4; (5) bridge tube 4 is welded to corresponding position by design.
Wherein,
(1), orifice plate 2 employing thickness are red metal plate or the corrosion resistant plate of 3.0mm, internal diameter equals 1/2nd of external diameter, orifice plate 2 endoporus are made up of cylindrical hole and truncated cone hole, wherein, the orifice plate endoporus of inlet end is a cylindrical hole, and thickness is 1mm, and orifice plate 2 endoporus of outlet side are outside diffused truncated cone hole, thickness is 2mm, and the coning angle of conical bore is 90 °.
Orifice plate 2 external diameters have five kinds of 15.24mm, 20.32mm, 25.40mm, 38.00mm, 50.80mm, and corresponding orifice plate 2 internal diameters are respectively: 7.62mm, 10.16mm, 12.70mm, 19.00mm, 25.40mm, choose as required.
(2) straight tube 1 adopts the standard weldless steel tube, two ends respectively are provided with 50mm anti-tripping (not drawing among the figure), the straight tube internal diameter equates with orifice plate 2 external diameters, be respectively: 15.24mm, 20.32mm, 25.40mm, 38.00mm, 50.80mm, have two on the tube wall of straight tube 1 and measure aperture, the diameter of measuring aperture is 6mm, measure aperture centre distance orifice plate 2 center line distances from being respectively: inlet end is the length of orifice plate 2 internal diameters, the outlet side is 1/2nd of orifice plate 2 internal diameters, measure the measuring tube 3 of weld diameter 8mm above the aperture, measuring tube 3 is a copper tube, and its length is 2～3mm.
(3) bridge tube 4 adopts the standard weldless steel tube, and corresponding straight tube 1 internal diameter of bridge tube 4 internal diameters is respectively: 10.16mm, 15.24mm, 20.32mm, 25.40mm, 38.00mm open and close operation valve 5 and adopt and bridge tube 4 corresponding ball valves.
During use, the two ends of straight tube 1 are connected with other pipelines respectively, under suction function, gas flows in straight tube 1 and is discharged from mine, measuring tube 3 and surveying instrument are communicated with (not drawing among the figure), when needing to measure gas flow, close and open and close operation valve 5, gas can not pass through from bridge tube 4, utilize the throttling action of gas by orifice, flow velocity is increased, pressure reduces, cause orifice plate 2 front and back pressure differences, as the foundation of measuring; When not measuring gas flow speed, open and open and close operation valve 5, gas also can pass through from bridge tube 4, utilizes the bridge-type shunting action to reduce the loss of gas drainage negative pressure.Its uses very convenient, and energy efficient greatly.
Embodiment two: present embodiment and embodiment one are basic identical, and something in common does not repeat, and difference is: the square that is shaped as openings at one side of bridge tube.
Embodiment three: present embodiment and embodiment one are basic identical, and something in common does not repeat, and difference is: bridge tube be shaped as the trapezoidal of bottom opening.
Change the concrete size of straight tube, bridge tube, orifice plate, measuring tube, the shape that changes bridge tube and connected mode and change the specific constructive form that opens and closes operation valve, can form a plurality of embodiment, be common variation range of the present utility model, do not describe in detail one by one at this.
Claims (9)
1. bridge-type single hole orifice flowmeter, contain straight tube, in the described straight tube orifice plate is installed, a measuring tube is set respectively on the straight pipe wall of these orifice plate both sides, it is characterized in that: a described straight tube and parallel a connection of bridge tube, the two inner chamber is interconnected, and two tie points of described straight tube and bridge tube lay respectively at the outside of two measuring tubes, a keying of installation operation valve on the described bridge tube.
2. bridge-type single hole orifice flowmeter according to claim 1 is characterized in that: the rectangle that is shaped as openings at one side of described bridge tube, or be the square of openings at one side, or be the trapezoidal of bottom opening.
3. bridge-type single hole orifice flowmeter according to claim 1 and 2 is characterized in that: described keying operation valve is a ball valve.
4. bridge-type single hole orifice flowmeter according to claim 1 and 2, it is characterized in that: the measuring tube center of described inlet end and the distance of orifice plate center line equal the orifice plate internal diameter, and the measuring tube center of described outlet side and the distance of orifice plate center line equal half of orifice plate internal diameter.
5. bridge-type single hole orifice flowmeter according to claim 1 and 2, it is characterized in that: described orifice plate internal diameter equals half of orifice plate external diameter; And the orifice plate endoporus is made up of cylindrical hole and truncated cone hole, and wherein, the orifice plate endoporus of inlet end is a cylindrical hole, and the orifice plate endoporus of outlet side is outside diffused truncated cone hole.
6. bridge-type single hole orifice flowmeter according to claim 5 is characterized in that: the coning angle of described conical bore is 90 °.
7. bridge-type single hole orifice flowmeter according to claim 5 is characterized in that: described orifice plate external diameter is any among 15.24mm, 20.32mm, 25.40mm, 38.00mm, the 50.80mm.
8. bridge-type single hole orifice flowmeter according to claim 1 and 2 is characterized in that: described bridge tube internal diameter and straight tube internal diameter are complementary; Described orifice plate is that red metal plate or the corrosion resistant plate of 3.0mm made by thickness.
9. bridge-type single hole orifice flowmeter according to claim 1 and 2 is characterized in that: described straight tube two ends are respectively arranged with anti-tripping, are convenient to firmly be connected with other pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200907283U CN201043906Y (en) | 2007-06-15 | 2007-06-15 | Bridge type single-hole orifice plate flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200907283U CN201043906Y (en) | 2007-06-15 | 2007-06-15 | Bridge type single-hole orifice plate flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201043906Y true CN201043906Y (en) | 2008-04-02 |
Family
ID=39258799
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200907283U Expired - Lifetime CN201043906Y (en) | 2007-06-15 | 2007-06-15 | Bridge type single-hole orifice plate flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201043906Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261241A (en) * | 2010-05-25 | 2011-11-30 | 淮南矿业(集团)有限责任公司 | Device and method for measuring signal hole in mine gas extraction system |
| CN102373956A (en) * | 2010-08-17 | 2012-03-14 | 淮南矿业(集团)有限责任公司 | Coal extraction single-hole monitoring method |
| CN107701221A (en) * | 2017-09-30 | 2018-02-16 | 河南理工大学 | A kind of high negative pressure pipeline gas extraction metering device and its application method |
-
2007
- 2007-06-15 CN CNU2007200907283U patent/CN201043906Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102261241A (en) * | 2010-05-25 | 2011-11-30 | 淮南矿业(集团)有限责任公司 | Device and method for measuring signal hole in mine gas extraction system |
| CN102261241B (en) * | 2010-05-25 | 2013-11-20 | 淮南矿业(集团)有限责任公司 | Device and method for measuring signal hole in mine gas extraction system |
| CN102373956A (en) * | 2010-08-17 | 2012-03-14 | 淮南矿业(集团)有限责任公司 | Coal extraction single-hole monitoring method |
| CN107701221A (en) * | 2017-09-30 | 2018-02-16 | 河南理工大学 | A kind of high negative pressure pipeline gas extraction metering device and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080402 |
|
| CX01 | Expiry of patent term |