CN204439143U - A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head - Google Patents
A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head Download PDFInfo
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- CN204439143U CN204439143U CN201520152980.7U CN201520152980U CN204439143U CN 204439143 U CN204439143 U CN 204439143U CN 201520152980 U CN201520152980 U CN 201520152980U CN 204439143 U CN204439143 U CN 204439143U
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Abstract
The utility model discloses a kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head, comprise the cylinder-shaped joint of epimere and the pressure head body of hypomere, there is in pressure head the total head passage through to pressure head body lower part from cylinder-shaped joint top and static pressure passage, the bottom of pressure head body is respectively equipped with the total head flow-guiding channel and static pressure flow-guiding channel that are connected with static pressure passage with total head passage, the cross section of pressure head body is in T shape, total head passage, total head flow-guiding channel and static pressure passage, static pressure flow-guiding channel is placed on the vertical edge of T-shaped pressure head body and horizontal edge, total head passage, the axis of static pressure passage and total head flow-guiding channel is in same plane, the axis of static pressure flow-guiding channel and described total head passage, the determined plane being perpendicular of axis of static pressure passage and total head flow-guiding channel, and the axis perpendicular of the axis of static pressure flow-guiding channel and total head flow-guiding channel.The utility model can extract the larger differential pressure value of low flow velocity fluid, and then can accurately measure the flow of low flow velocity fluid in pipeline.
Description
Technical field
The utility model relates to a kind of pitot tube differential pressure flow sensor pressure head, especially relates to a kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head.
Background technology
Pitot tube differential pressure flow sensor is the flow sensor of the pitot tube principle design according to French scientist H.Pitot invention, pitot tube differential pressure flow sensor primarily of cylindricality connecting pipe be arranged on the pressure head group be connected below cylindricality connecting pipe and with cylindricality connecting pipe and become, described connecting pipe has ram-air pipe and static tube, and described pressure head is the pressure element of pitot tube principle.The pressure header structure of pitot tube differential pressure flow sensor of the prior art is the isometrical right cylinder of external diameter and described cylindricality cylindricality connecting pipe, total head passage and static pressure passage is provided with in pressure head, the bottom of pressure head is provided with and the total head flow-guiding channel of total head passage and static pressure channel connection and static pressure flow-guiding channel, described total head passage, static pressure passage, pressure head, the axis of total head flow-guiding channel and static pressure flow-guiding channel at grade, the axis of total head flow-guiding channel and static pressure flow-guiding channel on the same line and with the axis perpendicular of pressure head, when described pressure head and described cylindricality connecting pipe are assembled into one, described total head passage is connected with static tube with the ram-air pipe of described connecting pipe respectively with static pressure passage.
Form with connecting pipe when above-mentioned pitot tube differential pressure flow sensor pressure head of the prior art uses and integrally form pitot tube differential pressure flow sensor, pitot tube differential pressure flow sensor is vertically inserted in tested pipeline, make total head flow-guiding channel facing to fluid carry out flow path direction, static pressure flow-guiding channel goes flow path direction consistent with fluid, pitot tube differential pressure flow sensor extracts the total head of fluids within pipes and static pressure difference by pressure head and sends the pressure reduction of total head and static pressure to flow integrator in electric signal mode by differential pressure transmitter again, finally calculate by flow integrator the flow flowing through fluids within pipes.The structure of pressure head is very large to the Accuracy of fluids within pipes flow measurement, the structure of above-mentioned prior art pressure head is applicable to the fluid flow of the higher situation of measuring channel inner fluid speed, the fluid total head that pressure head extracts when fluids within pipes flow velocity is lower and the pressure reduction of static pressure very little, the electric signal sending flow integrator through differential pressure transmitter to is very weak, directly cause the error of fluids within pipes flow measurement comparatively large, the flow of fluids within pipes cannot be accurately measured.
Utility model content
The technical problems to be solved in the utility model is to provide a kind ofly also can be extracted the differential pressure value of larger fluid total head and static pressure and then can accurately measure low flow velocity, the high precision pitot tube differential pressure flow sensor pressure head of fluids within pipes flow when fluids within pipes flow velocity is lower.
For solving the problems of the technologies described above, a kind of low flow velocity of the utility model, high precision pitot tube differential pressure flow sensor pressure head, this pressure head comprises the cylinder-shaped joint of epimere and the pressure head body of hypomere, there is in pressure head the total head passage through to pressure head body lower part from cylinder-shaped joint top and static pressure passage, the bottom of pressure head body is respectively equipped with the total head flow-guiding channel and static pressure flow-guiding channel that are connected with static pressure passage with described total head passage, the cross section of described pressure head body is in T shape, described total head passage, total head flow-guiding channel and static pressure passage, static pressure flow-guiding channel is placed on the vertical edge of T-shaped pressure head body and horizontal edge, described total head passage, the axis of static pressure passage and total head flow-guiding channel is in same plane, the axis of described static pressure flow-guiding channel and described total head passage, the determined plane being perpendicular of axis of static pressure passage and total head flow-guiding channel, and the axis perpendicular of the axis of static pressure flow-guiding channel and total head flow-guiding channel.
Adopt the low flow velocity of said structure, high precision pitot tube differential pressure flow sensor pressure head, during use, pressure head to be connected with connecting pipe with the cylinder-shaped joint of its epimere and to be formed sensor, when measuring channel inner fluid flow pressure head total head flow-guiding channel facing to fluid carry out flow path direction, because the cross section of described pressure head body is in T shape, described total head passage, total head flow-guiding channel and static pressure passage, static pressure flow-guiding channel is placed on the vertical edge of T-shaped pressure head body and horizontal edge, described total head passage, the axis of static pressure passage and total head flow-guiding channel is in same plane, the axis of described static pressure flow-guiding channel and described total head passage, the determined plane being perpendicular of axis of static pressure passage and total head flow-guiding channel, and the axis perpendicular of the axis of static pressure flow-guiding channel and total head flow-guiding channel, two right angle that fluid can be formed at the vertical edge of T-shaped pressure head body side and horizontal edge when fluids within pipes flows through this pressure head body produce whirlpool, fluid can form return phenomenon after producing whirlpool and be slipped over fast by the horizontal edge edge of T-shaped pressure head body, produce minimum pressure at static pressure flow-guiding channel place and even can form negative pressure, therefore pressure head of the present utility model can extract relatively large differential pressure value when fluids within pipes flow velocity is very low, and then the flow of low flow velocity fluid in pipeline can be accurately measured.
As further improvement of the utility model, the internal diameter of described total head passage, total head flow-guiding channel is preferably 8mm; The internal diameter of described static pressure passage, static pressure flow-guiding channel is preferably 6mm.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is the schematic front view of the utility model low flow velocity, high precision pitot tube differential pressure flow sensor pressure head.
Fig. 2 is the side cross-sectional schematic of the utility model low flow velocity, high precision pitot tube differential pressure flow sensor pressure head.
Fig. 3 is along A-A line cross-sectional schematic in Fig. 2.
Embodiment
See Fig. 1-Fig. 3, a kind of low flow velocity of the utility model, high precision pitot tube differential pressure flow sensor pressure head, this pressure head comprises the cylinder-shaped joint 1 of epimere and the pressure head body 2 of hypomere, there is in pressure head the total head passage 3 through to pressure head body 2 bottom from cylinder-shaped joint 1 top and static pressure passage 4, the bottom of pressure head body 2 is respectively equipped with the total head flow-guiding channel 5 and static pressure flow-guiding channel 6 that are connected with static pressure passage 4 with described total head passage 3, the cross section of described pressure head body 2 is in T shape, described total head passage 3, total head flow-guiding channel 5 and static pressure passage 4, static pressure flow-guiding channel 6 is placed on the vertical edge 7 of T-shaped pressure head body 2 and horizontal edge 8, described total head passage 3, the axis of static pressure passage 4 and total head flow-guiding channel 5 is in same plane, the axis of described static pressure flow-guiding channel 6 and described total head passage 3, the determined plane being perpendicular of axis of static pressure passage 4 and total head flow-guiding channel 5, and the axis perpendicular of the axis of static pressure flow-guiding channel 6 and total head flow-guiding channel 5.The internal diameter of described total head passage 3, total head flow-guiding channel 5 is preferably 8mm; The internal diameter of described static pressure passage 4, static pressure flow-guiding channel 6 is preferably 6mm.
Claims (2)
1. a low flow velocity, high precision pitot tube differential pressure flow sensor pressure head, this pressure head comprises the cylinder-shaped joint (1) of epimere and the pressure head body (2) of hypomere, there is in pressure head the total head passage (3) through to pressure head body (2) bottom from cylinder-shaped joint (1) top and static pressure passage (4), the bottom of pressure head body (2) is respectively equipped with the total head flow-guiding channel (5) and static pressure flow-guiding channel (6) that are connected with static pressure passage (4) with described total head passage (3), it is characterized in that: the cross section of described pressure head body (2) is in T shape, described total head passage (3), total head flow-guiding channel (5) and static pressure passage (4), static pressure flow-guiding channel (6) is placed on the vertical edge (7) of T-shaped pressure head body (2) and horizontal edge (8), described total head passage (3), the axis of static pressure passage (4) and total head flow-guiding channel (5) is in same plane, the axis of described static pressure flow-guiding channel (6) and described total head passage (3), the determined plane being perpendicular of axis of static pressure passage (4) and total head flow-guiding channel (5), and the axis perpendicular of the axis of static pressure flow-guiding channel (6) and total head flow-guiding channel (5).
2. low flow velocity, high precision pitot tube differential pressure flow sensor pressure head as claimed in claim 1, is characterized in that: the internal diameter of described total head passage (3), total head flow-guiding channel (5) is 8mm; The internal diameter of described static pressure passage (4), static pressure flow-guiding channel (6) is 6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520152980.7U CN204439143U (en) | 2015-03-18 | 2015-03-18 | A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520152980.7U CN204439143U (en) | 2015-03-18 | 2015-03-18 | A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204439143U true CN204439143U (en) | 2015-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520152980.7U Expired - Fee Related CN204439143U (en) | 2015-03-18 | 2015-03-18 | A kind of low flow velocity, high precision pitot tube differential pressure flow sensor pressure head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204439143U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387894A (en) * | 2015-10-16 | 2016-03-09 | 辽宁毕托巴科技有限公司 | Bitobar flowmeter |
-
2015
- 2015-03-18 CN CN201520152980.7U patent/CN204439143U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105387894A (en) * | 2015-10-16 | 2016-03-09 | 辽宁毕托巴科技有限公司 | Bitobar flowmeter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150701 Termination date: 20180318 |