CN210802569U - Pitot tube structure and differential pressure type flowmeter - Google Patents
Pitot tube structure and differential pressure type flowmeter Download PDFInfo
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- CN210802569U CN210802569U CN201921730690.0U CN201921730690U CN210802569U CN 210802569 U CN210802569 U CN 210802569U CN 201921730690 U CN201921730690 U CN 201921730690U CN 210802569 U CN210802569 U CN 210802569U
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Abstract
The utility model provides a pitot tube structure and a differential pressure type flowmeter, which relates to the technical field of pitot tubes, and comprises a dynamic pressure measuring tube and an auxiliary measuring tube; one end of the dynamic pressure measuring pipe is provided with a first measuring port, the auxiliary measuring pipe is communicated with the dynamic pressure measuring pipe, and the auxiliary measuring pipe is provided with a second measuring port; because the one end that the buret was surveyed to the dynamic pressure is provided with first measurement mouth, be provided with the second on the supplementary buret of surveying and measure the mouth, first measurement mouth and second are measured the mouth and are set up in the position of difference, and supplementary buret of surveying communicates with the buret is surveyed to the dynamic pressure, compare with the pitot tube among the prior art, measure mouthful through first measurement mouth and second and cooperate, increased the quantity that the mouth was measured to the dynamic pressure, can the balanced fluidic dynamic pressure of different positions departments in the pipeline, do benefit to the measuring error who reduces fluid dynamic pressure.
Description
Technical Field
The utility model belongs to the technical field of the pitot tube technique and specifically relates to a pitot tube structure and differential pressure formula flowmeter are related to.
Background
The pitot tube is a tubular device for measuring total pressure (dynamic pressure) and static pressure of fluid to determine fluid velocity, and the pitot tube is combined with a transmitter, a flow calculation controller and the like to form a differential pressure type flowmeter.
The current pitot tube mainly includes dynamic pressure survey buret and static pressure survey buret, and wherein, the one end of dynamic pressure survey buret is provided with a dynamic pressure and measures the mouth, and the one end of static pressure survey buret is provided with the static pressure and measures the mouth, and the one end that the dynamic pressure surveyed the mouth was kept away from to dynamic pressure survey buret and the one end that the static pressure survey buret kept away from the static pressure and measure the mouth.
Because the fluid in the pipeline flows in an irregular wave shape, the dynamic pressure of the fluid at different positions is different, the dynamic pressure value of the fluid is difficult to accurately detect only through a single dynamic pressure measuring port at the end part of the dynamic pressure measuring pipe, and the measuring error is large.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art that is known to a person skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pitot tube structure and differential pressure formula flowmeter to the great technical problem of pitot tube to fluid dynamic pressure measuring error among the prior art has been alleviated.
In order to solve the technical problem, the utility model provides a technical scheme lies in:
the pitot tube structure provided by the utility model comprises a dynamic pressure measuring tube and an auxiliary measuring tube;
one end of the dynamic pressure measuring pipe is provided with a first measuring port, the auxiliary measuring pipe is communicated with the dynamic pressure measuring pipe, and a second measuring port is arranged on the auxiliary measuring pipe.
Further, two second measuring ports are arranged, and the two second measuring ports are respectively arranged at two ends of the auxiliary measuring pipe.
Further, the first measuring port and the second measuring port are both provided with oval shapes.
Further, the auxiliary measuring pipe and the dynamic pressure measuring pipe are arranged in parallel;
the auxiliary measuring pipe and the dynamic pressure measuring pipe are provided with a connecting pipe, one end of the connecting pipe is communicated with the dynamic pressure measuring pipe, and the other end of the connecting pipe is communicated with the auxiliary measuring pipe.
Furthermore, one end, far away from the first measuring port, of the dynamic pressure measuring pipe is provided with a first sealing plug, and the first sealing plug is detachably connected with the dynamic pressure measuring pipe.
Furthermore, one end of the dynamic pressure measuring pipe, which is close to the first sealing plug, is provided with a first pressure guiding pipe; the first pressure pipe and the dynamic pressure measuring pipe are arranged at an included angle, and one end of the first pressure pipe is communicated with the dynamic pressure measuring pipe.
Further, the pitot tube structure further comprises a static pressure measuring tube arranged in parallel with the dynamic pressure measuring tube;
the outer wall of the static pressure measuring pipe is connected with the outer wall of the dynamic pressure measuring pipe;
the static pressure measuring tube is close to one end of the first measuring port and is provided with a static pressure measuring port, and the other end of the static pressure measuring tube is detachably connected with a second sealing plug.
Further, a second pressure leading pipe is arranged on the static pressure measuring pipe;
the second draws presses the pipe with the static pressure survey buret is the contained angle setting, the second draw the one end of pressing the pipe with the static pressure surveys buret intercommunication.
Further, the pitot tube structure further comprises a connecting flange;
the connecting flange is sleeved on the static pressure measuring pipe and the dynamic pressure measuring pipe and is respectively connected with the static pressure measuring pipe and the dynamic pressure measuring pipe;
and the connecting flange is provided with a connecting screw hole.
The utility model provides a differential pressure flowmeter, which comprises a transmitter and a pitot tube structure;
the transmitter is communicated with the dynamic pressure measuring pipe.
Technical scheme more than combining, the utility model discloses the beneficial effect who reaches lies in:
the utility model provides a pitot tube structure, which comprises a dynamic pressure measuring tube and an auxiliary measuring tube; one end of the dynamic pressure measuring pipe is provided with a first measuring port, the auxiliary measuring pipe is communicated with the dynamic pressure measuring pipe, and a second measuring port is arranged on the auxiliary measuring pipe.
Because the one end that the buret was surveyed to the dynamic pressure is provided with first measurement mouth, be provided with the second on the supplementary buret of surveying and measure the mouth, first measurement mouth and second are measured the mouth and are set up in the position of difference, and supplementary buret of surveying communicates with the buret is surveyed to the dynamic pressure, compare with the pitot tube among the prior art, measure mouthful through first measurement mouth and second and cooperate, increased the quantity that the mouth was measured to the dynamic pressure, can the balanced fluidic dynamic pressure of different positions departments in the pipeline, do benefit to the measuring error who reduces fluid dynamic pressure.
Drawings
For a clear explanation of the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a front view of a pitot tube structure provided in an embodiment of the present invention;
fig. 2 is a top view of a pitot tube structure according to an embodiment of the present invention.
Icon: 100-dynamic pressure measuring tube; 110-a first measurement port; 120-a first sealing plug; 130-a first pressure-leading pipe; 200-auxiliary measuring tube; 210-a second measurement port; 300-static pressure measuring tube; 310-static pressure measuring port; 320-a second sealing plug; 330-a second pressure-leading pipe; 400-a connecting flange; 410-connecting screw holes.
Detailed Description
The technical solution of the present invention will be described in detail and fully with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present embodiment provides a pitot tube structure including a dynamic pressure measurement pipe 100 and an auxiliary measurement pipe 200; one end of the dynamic pressure measuring pipe 100 is provided with a first measuring port 110, the auxiliary measuring pipe 200 is communicated with the dynamic pressure measuring pipe 100, and the auxiliary measuring pipe 200 is provided with a second measuring port 210.
Specifically, the dynamic pressure measuring tube 100 is a hollow metal circular tube, preferably, the dynamic pressure measuring tube 100 is made of stainless steel, the end of one end of the dynamic pressure measuring tube 100 is provided with a first measuring port 110, the first measuring port 110 may be circular, oval or other polygons, preferably, the first measuring port 110 is oval; the auxiliary measuring tube 200 is also provided as a hollow metal round tube, preferably, the auxiliary measuring tube 200 is also provided as a stainless steel material, the second measuring ports 210 are provided at the ends or other positions other than the ends of the auxiliary measuring tube 200, the second measuring ports 210 may be provided as a circle, an ellipse or other polygons, and preferably, the second measuring ports 210 are also provided as an ellipse.
Compared with the circular measuring port, the elliptical measuring port increases the contact area with the fluid, has wider coverage area for the fluid which moves irregularly, and is beneficial to improving the measuring accuracy; the number of the second measuring ports 210 can be one or more, and the first measuring port 110 is matched with the second measuring port 210, so that measuring points for fluid are increased, fluid pressures at different positions can be balanced, and the accuracy of fluid dynamic pressure measurement is improved.
The pitot tube structure that this embodiment provided, because the one end of dynamic pressure measurement pipe 100 is provided with first measurement mouth 110, be provided with second measurement mouth 210 on the supplementary measurement pipe 200, first measurement mouth 110 and second measurement mouth 210 set up in the position of difference, and supplementary measurement pipe 200 and dynamic pressure measurement pipe 100 intercommunication, compare with the pitot tube among the prior art, cooperate through first measurement mouth 110 and second measurement mouth 210, the quantity of dynamic pressure measurement mouth has been increased, can equalize the dynamic pressure of the different positions departments of the fluid in the pipeline, do benefit to and reduce the measuring error of dynamic pressure fluid.
On the basis of the above embodiment, further, the present embodiment provides two second measurement ports 210 in the pitot tube structure, and the two second measurement ports 210 are respectively disposed at two ends of the auxiliary measurement tube 200.
Specifically, two second measurement ports 210 are respectively provided at both ends of the auxiliary measurement pipe 200, and the fluid pressure is transmitted into the auxiliary measurement pipe 200 through the two second measurement ports 210 and then transmitted into the dynamic pressure measurement pipe 100 from the auxiliary measurement pipe 200.
As another embodiment of the present embodiment, the second measuring ports 210 are provided as one, one second measuring port 210 is provided at one end of the auxiliary measuring pipe 200, and the end of the auxiliary measuring pipe 200 away from the second measuring port 210 is closed.
As another embodiment of the present embodiment, at least three second measurement ports 210 are provided, two of the second measurement ports are provided at both ends of the auxiliary measurement pipe 200, and the remaining second measurement ports 210 are provided at positions other than the ends of the auxiliary measurement pipe 200.
Further, the first measuring port 110 and the second measuring port 210 are each provided in an elliptical shape.
Specifically, as shown in fig. 2, an included angle is formed between the plane of the outer contour of the oval measuring port and the horizontal plane, preferably, the included angle between the plane of the outer contour of the oval measuring port and the horizontal plane is 23 °, and tests show that the pressure production effect of the dynamic pressure measuring pipe 100 and the auxiliary measuring pipe 200 is the best when the included angle is 23 °.
Furthermore, as shown in fig. 1, the connection point of the auxiliary measuring pipe 200 and the dynamic pressure measuring pipe 100 can be appropriately translated to the left or right, and preferably, the position of the auxiliary measuring pipe 200 is set as follows: three points are obtained by vertically projecting one first measuring port 110 and two second measuring ports 210 in a horizontal plane, wherein the projection point of one second measuring port 210 close to the first measuring port 110 is located at the middle position of the connecting line of the projection point of the other second measuring port 210 and the projection point of the first measuring port 110.
As another embodiment of this embodiment, the first measuring port 110 is provided in an elliptical shape, and the second measuring port 210 is provided in a circular shape;
as another embodiment of this embodiment, the first measuring port 110 is provided in a circular shape, and the second measuring port 210 is provided in an elliptical shape;
as another implementation of the present embodiment, the first measuring port 110 and the second measuring port 210 are both provided in a circular shape;
further, the auxiliary measuring pipe 200 and the dynamic pressure measuring pipe 100 are arranged in parallel;
a connecting pipe is arranged between the auxiliary measuring pipe 200 and the dynamic pressure measuring pipe 100, one end of the connecting pipe is communicated with the dynamic pressure measuring pipe 100, and the other end is communicated with the auxiliary measuring pipe 200.
Specifically, the one end welding of connecting pipe is on auxiliary measuring pipe 200, and the other end welding is on dynamic pressure measuring pipe 100, and the straight line of connecting pipe place perpendicular to auxiliary measuring pipe 200 place straight line and dynamic pressure measuring pipe 100 place straight line, and the connecting pipe is in auxiliary measuring pipe 200's intermediate position.
As an alternative embodiment of this embodiment, the outer wall of the auxiliary measuring pipe 200 abuts against the outer wall of the dynamic pressure measuring pipe 100, the auxiliary measuring pipe 200 is welded to the dynamic pressure measuring pipe 100, and a communication hole is provided between the auxiliary measuring pipe 200 and the dynamic pressure measuring pipe 100.
Further, one end of the dynamic pressure measuring pipe 100, which is far away from the first measuring port 110, is provided with a first sealing plug 120, and the first sealing plug 120 is detachably connected with the dynamic pressure measuring pipe 100.
Specifically, an internal thread is arranged at one end of the dynamic pressure measuring pipe 100, which is far away from the first measuring port 110, an external thread is arranged on the first sealing plug 120, and the first sealing plug 120 is in threaded connection with the dynamic pressure measuring pipe 100; the interior of the dynamic pressure measuring pipe 100 can be easily cleaned by removing the first sealing plug 120.
As an alternative embodiment of this embodiment, a first sealing plug 120 is bonded to the end of the dynamic pressure measuring tube 100 remote from the first measuring port 110.
Further, a first pressure guiding pipe 130 is arranged at one end of the dynamic pressure measuring pipe 100 close to the first sealing plug 120; the first pressure leading pipe 130 and the dynamic pressure measuring pipe 100 are arranged at an included angle, and one end of the first pressure leading pipe 130 is communicated with the dynamic pressure measuring pipe 100.
Specifically, the first pressure guiding pipe 130 is a stainless steel circular pipe; the first pressure guiding pipe 130 is arranged at one end of the dynamic pressure measuring pipe 100 close to the first sealing plug 120, one end of the first pressure guiding pipe 130 is welded on the dynamic pressure measuring pipe 100, and the other end of the first pressure guiding pipe 130 is used for being communicated with a transmitter; because an included angle is formed between the first pressure introduction pipe 130 and the dynamic pressure measuring pipe 100, dirt is not easy to accumulate in the first pressure introduction pipe 130, and the first pressure introduction pipe 130 is not easy to block.
According to the pitot tube structure provided by the embodiment, the first measuring port 110 and the second measuring port 210 are both oval, and compared with a round measuring port, the oval measuring port has a larger contact area with fluid, so that pressure is easier to be obtained; be provided with the contained angle between the pipe 100 is surveyed through first pressure pipe 130 and the dynamic pressure to and the one end that first measurement mouth 110 was kept away from to dynamic pressure survey pipe 100 can be dismantled and be connected with first sealed end cap 120, conveniently surveys pipe 100 to the dynamic pressure and cleans, and dynamic pressure surveys pipe 100 also is difficult for blockking up.
On the basis of the above embodiment, further, the pitot tube structure provided by this embodiment further includes a static pressure measuring tube 300 disposed in parallel with the dynamic pressure measuring tube 100; the outer wall of the static pressure measuring pipe 300 is connected with the outer wall of the dynamic pressure measuring pipe 100; the static pressure measuring tube 300 is provided with a static pressure measuring port 310 at one end near the first measuring port 110, and a second sealing plug 320 is detachably connected at the other end.
Specifically, the static pressure measuring pipe 300 is set up to the metal pipe, and the static pressure pipe of preferred sets up to stainless steel, and the length of static pressure measuring pipe 300 and the length of dynamic pressure measuring pipe 100 set up to equal, and the tip of static pressure measuring pipe 300 and the tip parallel and level setting of dynamic pressure measuring pipe 100, and the static pressure measuring pipe 300 is connected with dynamic pressure measuring pipe 100 through the welding in the mode.
The static pressure measurement port 310 is provided with a circular opening, the connection mode of the second sealing plug 320 and the pressure reduction measurement pipe and the connection mode of the first sealing plug 120 and the dynamic pressure measurement pipe 100 are the same, and the connection mode is not repeated here, so that the second sealing plug 320 is detached from the static pressure measurement pipe 300, and the inside of the pressure reduction measurement pipe can be cleaned conveniently.
Further, a second pressure leading pipe 330 is arranged on the static pressure measuring pipe 300; the second pressure leading pipe 330 and the static pressure measuring pipe 300 are arranged at an included angle, and one end of the second pressure leading pipe 330 is communicated with the static pressure measuring pipe 300.
Specifically, one end of the second pressure-leading pipe 330 is welded on the static pressure measuring pipe 300, and the connection point of the second pressure-leading pipe 330 and the static pressure pipe is located right below the connection point of the first pressure-leading pipe 130 and the dynamic pressure measuring pipe 100; the angle between the second pressure introduction pipe 330 and the static pressure measurement pipe 300 and the angle between the first pressure introduction pipe 130 and the dynamic pressure measurement pipe 100 are set to be equal, and the first pressure introduction pipe 130 and the second pressure introduction pipe 330 are symmetrical with respect to the horizontal plane.
Further, the pitot tube structure further includes a connection flange 400; the connecting flange 400 is sleeved on the static pressure measuring pipe 300 and the dynamic pressure measuring pipe 100, and the connecting flange 400 is respectively connected with the static pressure measuring pipe 300 and the dynamic pressure measuring pipe 100; the connection flange 400 is provided with a connection screw hole 410.
Specifically, a through hole is formed in the center of the connecting flange 400, the connecting flange 400 is sleeved on the static pressure measuring tube 300 and the dynamic pressure measuring tube 100 through the through hole, and the static pressure measuring tube 300 and the dynamic pressure measuring tube 100 are both welded on the connecting flange 400; the connecting screw holes 410 may be provided in plural, a connecting line of center points of the plurality of connecting screw holes 410 is provided in a ring shape, distances between two adjacent connecting screw holes 410 are set to be equal, and the connecting screw holes 410 are used to be matched with an external connecting bolt.
The pitot tube structure that this embodiment provided, static pressure measurement pipe 300 and dynamic pressure measurement pipe 100 form complete pitot tube structure mutually, draw through the second and press and be provided with the contained angle between pipe 330 and the static pressure measurement pipe 300 to and static pressure measurement pipe 300 keeps away from the one end of static pressure measurement mouth 310 and can dismantle and be connected with second seal plug 320, and the difficult jam of decompression measurement pipe also makes things convenient for the inside of static pressure measurement pipe 300 to clean.
On the basis of the above embodiment, further, the differential pressure flowmeter provided by this embodiment includes a transmitter and a pitot tube structure; the transducer communicates with a dynamic pressure measuring tube 100.
Specifically, the transmitter is fixed on the connecting flange 400 through a connecting bolt, the transmitter is respectively communicated with the first pressure guiding pipe 130 and the second pressure guiding pipe 330, the pressure at the first measuring port 110 and the second measuring port 210 is transmitted to the transmitter through the first pressure guiding pipe 130, and the pressure at the static pressure measuring port 310 is also transmitted to the transmitter through the second pressure guiding pipe 330.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A pitot tube structure, comprising: a dynamic pressure measuring pipe (100) and an auxiliary measuring pipe (200);
one end of the dynamic pressure measuring pipe (100) is provided with a first measuring port (110), the auxiliary measuring pipe (200) is communicated with the dynamic pressure measuring pipe (100), and a second measuring port (210) is arranged on the auxiliary measuring pipe (200).
2. A pitot tube structure according to claim 1, characterized in that two second measuring ports (210) are provided, two second measuring ports (210) being provided at both ends of the auxiliary measuring tube (200), respectively.
3. The pitot tube structure of claim 2, wherein said first measuring port (110) and said second measuring port (210) are each provided in an elliptical shape.
4. Pitot tube structure according to claim 3, characterized in that the auxiliary measuring tube (200) and the dynamic pressure measuring tube (100) are arranged in parallel;
the auxiliary measuring pipe (200) and the dynamic pressure measuring pipe (100) are provided with a connecting pipe therebetween, one end of the connecting pipe is communicated with the dynamic pressure measuring pipe (100), and the other end is communicated with the auxiliary measuring pipe (200).
5. The pitot tube structure according to claim 1, characterized in that an end of the dynamic pressure measuring tube (100) remote from the first measuring port (110) is provided with a first sealing plug (120), the first sealing plug (120) being detachably connected with the dynamic pressure measuring tube (100).
6. The pitot tube structure of claim 5, wherein one end of the dynamic pressure measuring tube (100) near the first sealing plug (120) is provided with a first pressure guiding tube (130);
the first pressure leading pipe (130) and the dynamic pressure measuring pipe (100) are arranged at an included angle, and one end of the first pressure leading pipe (130) is communicated with the dynamic pressure measuring pipe (100).
7. A pitot tube structure according to claim 1, characterized in that the pitot tube structure further comprises a static pressure measuring tube (300) arranged in parallel with the dynamic pressure measuring tube (100);
the outer wall of the static pressure measuring pipe (300) is connected with the outer wall of the dynamic pressure measuring pipe (100);
one end of the static pressure measuring tube (300) close to the first measuring port (110) is provided with a static pressure measuring port (310), and the other end of the static pressure measuring tube is detachably connected with a second sealing plug (320).
8. The pitot tube structure of claim 7, wherein a second pressure tapping tube (330) is provided on the static pressure measuring tube;
the second pressure leading pipe (330) and the static pressure measuring pipe (300) are arranged at an included angle, and one end of the second pressure leading pipe (330) is communicated with the static pressure measuring pipe (300).
9. The pitot tube structure of claim 7, further comprising a connection flange (400);
the connecting flange (400) is sleeved on the static pressure measuring pipe (300) and the dynamic pressure measuring pipe (100), and the connecting flange (400) is respectively connected with the static pressure measuring pipe (300) and the dynamic pressure measuring pipe (100);
and the connecting flange (400) is provided with a connecting screw hole (410).
10. A differential pressure flowmeter comprising a transmitter and the pitot tube structure of any of claims 1-9;
the transmitter is communicated with the dynamic pressure measuring pipe (100).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921730690.0U CN210802569U (en) | 2019-10-15 | 2019-10-15 | Pitot tube structure and differential pressure type flowmeter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921730690.0U CN210802569U (en) | 2019-10-15 | 2019-10-15 | Pitot tube structure and differential pressure type flowmeter |
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| CN210802569U true CN210802569U (en) | 2020-06-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856530A (en) * | 2021-01-20 | 2022-08-05 | 中国石油化工股份有限公司 | Petroleum wellhead instrument installation component |
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2019
- 2019-10-15 CN CN201921730690.0U patent/CN210802569U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114856530A (en) * | 2021-01-20 | 2022-08-05 | 中国石油化工股份有限公司 | Petroleum wellhead instrument installation component |
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