CN218097885U - A novel ultrasonic wave gas meter runner for promoting flow field stability - Google Patents
A novel ultrasonic wave gas meter runner for promoting flow field stability Download PDFInfo
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- CN218097885U CN218097885U CN202123020730.2U CN202123020730U CN218097885U CN 218097885 U CN218097885 U CN 218097885U CN 202123020730 U CN202123020730 U CN 202123020730U CN 218097885 U CN218097885 U CN 218097885U
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Abstract
The utility model discloses a novel ultrasonic wave gas meter runner for promoting flow field stability, which comprises a cavity body, a guide plate is arranged in the cavity body, a valve is arranged above the guide plate, the valve is externally connected with an air inlet, a guide pipe is arranged below the guide plate, the guide pipe is provided with an inlet section, a measuring section and an outlet section, and is also provided with an air outlet pipe and an air outlet, and a buffer cavity is connected between the guide pipe and the air outlet pipe; the energy converter mounting rack is also arranged; and the inlet section is also provided with a grid net. The utility model has the advantages that: the flow channel integrates structures such as a grid net, a horn mouth, a rectifying sheet type straightener and the like, and is used for improving the stability of a flow field and reducing the attenuation degree of ultrasonic waves during flow measurement; the forward and reverse time difference obtained by the transducer mounting frame is ensured to be within a reasonable interval range, so that the flow field of the measuring section is more stable, the ultrasonic measurement precision is improved, and the pressure loss of the ultrasonic gas meter provided with the flow channel is ensured to be within a range required by the verification regulation.
Description
Technical Field
The utility model relates to a measuring equipment field, especially a novel ultrasonic wave gas meter runner for promoting flow field stability.
Background
The ultrasonic gas meter has the advantages of high measurement precision, good reliability, wide range ratio, long service life and the like, and becomes a gas meter with the widest development prospect, and the measurement precision is an important index for measuring the gas meter. The ultrasonic gas meter is a speed type measuring meter, and flow field speed information loaded in a sound wave transmission process is obtained by measuring and solving flight time.
However, at present, many ultrasonic gas meters in China have poor gas flow stability, large ultrasonic detection data fluctuation and poor metering accuracy due to the fact that no rectifier is installed or the rectifier is unreasonable to install. When the W-type sound channel arrangement is adopted, the attenuation of ultrasonic signals is too serious, and when the Z-type sound channel arrangement is adopted, the measurement accuracy is too low due to small forward and reverse time differences.
The patent document CN204346516U discloses an ultrasonic gas meter flow channel structure with a flow stabilizing effect, which comprises an ultrasonic measurement pipeline and a flow channel body, wherein the flow channel body is a flat rectangular block-shaped structure, so that the gas flow rate is increased, the ultrasonic stroke is long, and the maximum forward and reverse time difference of ultrasonic waves is ensured; the caliber of the flow channel body is slightly smaller than the caliber of the ultrasonic measurement pipeline and is connected with the ultrasonic measurement pipeline in an embedded mode; the runner body is provided with a chamfer at the air inlet and a plurality of layers of water stabilizing flow sheets near the air inlet, the flow stabilizing sheets are of sheet flat plate structures, and after gas is stabilized by the plurality of layers of flow stabilizing sheets, the stability of a gas flow field under complex conditions is ensured, and the stability of ultrasonic wave metering is improved. The air outlet of the flow channel body has certain curvature which is vertical to the ultrasonic measuring pipeline, the bending part is arc-shaped and has certain height fall, and the stability of the gas flowing through the flow channel is improved; the outlet of the flow channel body is provided with a horn mouth which is connected with the flow channel body in an embedded manner, so that gas can be discharged smoothly, and the flow stabilizing effect is realized. The flow channel structure is too simple, the pipeline is too long, the air flow pressure loss is large, and the measurement precision is influenced.
Patent document CN111595397A discloses a measuring tube structure for an ultrasonic gas meter, which includes: a first port air chamber, a second port air chamber, a linear measuring tube, a first ultrasonic sensor, a second ultrasonic sensor and a sealing bolt; the central axes of the first ultrasonic sensor and the second ultrasonic sensor are coincided with the central axis of the linear measuring pipe. According to the invention, the port air chambers designed at two ends of the ultrasonic gas meter are used for buffering, so that the stability of air flow in the measuring pipeline is ensured; the linear type measuring pipeline is utilized for measuring, the flow velocity measuring sensitivity is high, and the accuracy of ultrasonic gas meter flow measurement is good. However, with such a structure, the air flow buffer structure has too large space, which is easy to form a vortex and affects the measurement accuracy.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome above technical defect, provide a novel ultrasonic wave gas meter runner for promoting flow field stability, ensure that gas flow is stable, improve measurement accuracy.
The utility model discloses a realize that the technical scheme that its technical objective was taken is: a novel ultrasonic gas meter flow channel for improving the stability of a flow field comprises a cavity body, wherein a guide plate is arranged in the cavity body, a valve is arranged above the guide plate, the valve is externally connected with a gas inlet, a guide pipe is arranged below the valve, an inlet section, a measuring section and an outlet section are arranged on the guide pipe, a gas outlet pipe is further arranged in the cavity body and on the right side of the guide pipe, the tail end of the gas outlet pipe is externally connected with a gas outlet, and a buffer cavity is connected between the guide pipe and the gas outlet pipe;
the guide pipe and the outer wall of the measuring section are also provided with transducer mounting frames; a grid net is also arranged on the inlet section of the conduit.
Preferably, the vertical cross section of cavity is the cuboid structure, including left side wall, right side wall, upper limb wall, lower lateral wall, the valve opening orientation the left side wall.
Preferably, one end of the guide plate is connected to the left side wall, the other end of the guide plate extends towards the right side wall, and the distance between the right end of the guide plate and the right side wall is larger than the diameter of the air outlet pipe.
Preferably, a groove is arranged on the inner wall of the conduit measuring section, and a rectifying piece is inserted in the groove.
Preferably, the duct inlet section is of a bell mouth structure.
Preferably, square holes are formed in the grid mesh.
Preferably, the width of the buffer cavity is larger than the width of the guide pipe, and the length of the buffer cavity is larger than the diameter of the air outlet pipe.
Preferably, the guide pipe and the air outlet pipe are perpendicular to each other.
Preferably, the transducer mounting bracket comprises a bottom plate and mounting holes, the bottom plate is connected with the conduit, the mounting holes comprise two mutually symmetrical mounting holes, and the included angle between the axis of each mounting hole and the bottom plate is an acute angle.
Preferably, a notch is formed in the conduit, a flow deflector and a sealing ring are arranged between the notch and the transducer mounting frame, two through holes are formed in the flow deflector, and the through holes correspond to the mounting holes one to one.
The utility model has the advantages that: the flow channel integrates structures such as a grid mesh, a horn mouth, a rectifier piece type straightener and the like, and is used for improving the stability of a flow field and reducing the attenuation degree of ultrasonic waves during flow measurement; the forward and reverse time difference obtained by the transducer mounting frame is ensured to be within a reasonable interval range, so that the flow field of the measuring section is more stable, the ultrasonic measurement precision is improved, and the pressure loss of the ultrasonic gas meter provided with the flow channel is ensured to be within a range required by a verification regulation.
Drawings
FIG. 1 is a general schematic view of the present invention;
FIG. 2 is a perspective view of the structure of the guide tube and the air outlet tube;
FIG. 3 is another perspective view of the guide tube and the outlet tube;
figure 4 is a cross-sectional view of a catheter.
Labeled in the figure as: 1. a cavity; 101. a left side wall; 102. a right side wall; 103. an upper sidewall; 104. a lower sidewall;
2. a baffle; 3. a valve; 4. an air inlet; 5. a conduit; 51. an inlet section; 52. a measuring section; 521. a groove;
522. a commutator segment; 53. an outlet section; 54. a notch; 55. a flow deflector; 56. a seal ring; 57. a through hole; 6. an air outlet pipe; 7. an air outlet; 8. a buffer chamber; 9. a transducer mounting bracket; 91. a base plate; 92. mounting holes; 10. a grid mesh;
12. a square hole.
Detailed Description
The present invention will be further explained with reference to the embodiments of the drawings.
Example one
As shown in fig. 1-4: a novel ultrasonic gas meter flow channel for improving flow field stability comprises a cavity 1, wherein a flow guide plate 2 is arranged in the cavity 1, a valve 3 is arranged above the flow guide plate 2, the valve 3 is externally connected with an air inlet 4, a guide pipe 5 is arranged below the valve 3, an inlet section 51, a measuring section 52 and an outlet section 53 are arranged on the guide pipe 5, an air outlet pipe 6 is further arranged in the cavity 1 and on the right side of the guide pipe 5, the tail end of the air outlet pipe 6 is externally connected with an air outlet 7, and a buffer cavity 8 is connected between the guide pipe 5 and the air outlet pipe 6;
a transducer mounting rack 9 is arranged on the outer wall of the measuring section 52 on the guide pipe 5; a grid mesh 10 is also provided on the inlet section 51 on the conduit 5.
The vertical section of the cavity 1 is a cuboid structure and comprises a left side wall 101, a right side wall 102, an upper side wall 103 and a lower side wall 104, and the opening of the valve 3 faces the left side wall 101.
One end of the guide plate 2 is connected to the left side wall 101, the other end extends towards the right side wall 102, and the distance between the right end of the guide plate 2 and the front part of the right side wall 102 is larger than the diameter of the outlet pipe 6.
A groove 521 is arranged on the inner wall of the measuring section 52 of the conduit 5, and a fairing 522 is inserted into the groove 521.
The inlet section 51 of the conduit 5 is of a bell mouth structure.
The grid mesh 10 is provided with square holes 12.
The width of the buffer cavity 8 is larger than that of the guide pipe 5, and the length of the buffer cavity 8 is larger than the diameter of the air outlet pipe 6.
The guide pipe 5 and the air outlet pipe 6 are perpendicular to each other.
The transducer mounting frame 9 comprises a bottom plate 91 and a mounting hole 92, the bottom plate 91 is connected with the guide pipe 5, the mounting hole 92 comprises two mutually symmetrical parts, and an included angle between the axis of the mounting hole 92 and the bottom plate 91 is an acute angle.
A notch 54 is formed in the conduit 5, a flow deflector 55 and a sealing ring 56 are arranged between the notch 54 and the transducer mounting frame 9, two through holes 57 are formed in the flow deflector 55, and the through holes 57 correspond to the mounting holes 92 in a one-to-one manner.
The utility model discloses a theory of operation and working process as follows:
as shown by the arrows in fig. 1: after the gas enters from the valve 3, the opening of the valve 3 faces to the left side wall 101, so the gas flows to the left side wall 101 of the cavity 1 firstly, and then flows to the right from the area enclosed by the left side wall 101, the guide plate 2 and the upper side wall 103; the guide plate 2 is longer and extends rightwards, so that the fuel flow speed is buffered;
the gas flows downwards from the gap between the right end of the guide plate 2 and the right side wall 102 and the gas outlet pipe 6, flows leftwards, enters the area enclosed by the left side wall 101, the guide plate 2 and the lower side wall 104, and then enters the guide pipe from the inlet section 51 of the guide pipe 5 with the bell-mouth structure. When the gas enters the guide pipe 5, the grille net 10 with the square holes 12 divides the gas flow and then enters the passages among the commutator segments 522, the square holes 12 correspond to the gas flow passages among all layers of the commutator segments 522, the gas flow with irregular flow is preliminarily restricted, the radial speed of the gas is reduced, and the flow stability is further improved; then flows through the buffer cavity 8 rightwards and is discharged through the air outlet pipe 6. At the test section of the catheter 5, the transducer mounted on the transducer mounting 9 completes the test.
Ultrasonic wave airflow channel simple relatively, the die sinking of being convenient for can effectively promote the uniformity of product, can guarantee ultrasonic measurement signal's validity, can show again and promote flow field stability, its sealed effect has been guaranteed to the sealing washer, carries out actual measurement's pressure loss less to the gas simultaneously.
Claims (10)
1. The utility model provides a novel ultrasonic wave gas meter runner for promoting flow field stability, includes the cavity, its characterized in that: a guide plate is arranged in the cavity, a valve is arranged above the guide plate, the valve is externally connected with an air inlet, a guide pipe is arranged below the guide plate, an inlet section, a measuring section and an outlet section are arranged on the guide pipe, an air outlet pipe is also arranged in the cavity and on the right side of the guide pipe, the tail end of the air outlet pipe is externally connected with an air outlet, and a buffer cavity is connected between the guide pipe and the air outlet pipe;
a transducer mounting rack is arranged on the guide pipe and the outer wall of the measuring section; and a grid net is also arranged on the guide pipe and the inlet section.
2. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 1, characterized in that: the vertical section of cavity is the cuboid structure, including left side wall, right side wall, last lateral wall, lower lateral wall, the valve opening orientation the left side wall.
3. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 2, characterized in that: one end of the guide plate is connected to the left side wall, the other end of the guide plate extends towards the right side wall, and the distance between the right end of the guide plate and the front part of the right side wall is larger than the diameter of the air outlet pipe.
4. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 1, characterized in that: the inner wall of the conduit measuring section is provided with a groove, and a rectifier plate is inserted in the groove.
5. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 4, wherein: the inlet section of the conduit is of a bell mouth structure.
6. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 1, characterized in that: the grid net is provided with square holes.
7. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 1, characterized in that: the width of the buffer cavity is larger than that of the guide pipe, and the length of the buffer cavity is larger than the diameter of the air outlet pipe.
8. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 7, wherein: the guide pipe is perpendicular to the air outlet pipe.
9. The novel ultrasonic gas meter flow channel for improving flow field stability according to claim 1, characterized in that: the transducer mounting bracket comprises a bottom plate and mounting holes, the bottom plate is connected with the conduit, the mounting holes comprise two mutually symmetrical mounting holes, and the axis of each mounting hole and the included angle of the bottom plate are acute angles.
10. The novel ultrasonic gas meter flow channel for improving flow field stability of claim 9, wherein: the guide pipe is provided with a notch, the notch and the transducer mounting frame are provided with a flow deflector and a sealing ring between, the flow deflector is provided with two through holes, and the through holes correspond to the mounting holes one to one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123020730.2U CN218097885U (en) | 2021-12-04 | 2021-12-04 | A novel ultrasonic wave gas meter runner for promoting flow field stability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123020730.2U CN218097885U (en) | 2021-12-04 | 2021-12-04 | A novel ultrasonic wave gas meter runner for promoting flow field stability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218097885U true CN218097885U (en) | 2022-12-20 |
Family
ID=84443309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123020730.2U Active CN218097885U (en) | 2021-12-04 | 2021-12-04 | A novel ultrasonic wave gas meter runner for promoting flow field stability |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218097885U (en) |
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2021
- 2021-12-04 CN CN202123020730.2U patent/CN218097885U/en active Active
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