CN215811037U

CN215811037U - Metering component for ultrasonic gas meter and gas meter with same

Info

Publication number: CN215811037U
Application number: CN202220023169.9U
Authority: CN
Inventors: 尹玉国; 王贵周; 薛亭亭; 田洪飞; 姜棋
Original assignee: SHANDONG START MEASUREMENT CONTROL EQUIPMENT CO Ltd
Current assignee: SHANDONG START MEASUREMENT CONTROL EQUIPMENT CO Ltd
Priority date: 2022-01-07
Filing date: 2022-01-07
Publication date: 2022-02-11
Anticipated expiration: 2032-01-07

Abstract

The utility model discloses a metering component for an ultrasonic gas meter and a gas meter with the same, and relates to the technical field of gas metering, wherein the metering component comprises a gas flow channel, wherein one end of the gas flow channel is provided with an air inlet, and an ultrasonic sensor is arranged on the gas flow channel; the gas flow channel is of a circular cylindrical structure, and a rectifying component is arranged between the gas inlet and the ultrasonic sensor; the end part of the gas flow passage, which is provided with the gas inlet hole, is provided with a flow blocking part, and the gas inlet hole is arranged on the flow blocking part. The metering component for the ultrasonic gas meter and the gas meter with the metering component solve the technical problem of low metering precision of the gas meter in the prior art, and are accurate in metering data and high in metering precision.

Description

Metering component for ultrasonic gas meter and gas meter with same

Technical Field

The utility model relates to the technical field of gas metering equipment, in particular to a metering component for an ultrasonic gas meter and a gas meter with the metering component.

Background

An ultrasonic gas meter is a metering instrument based on an ultrasonic sensor. The ultrasonic sensor uses sound wave medium to make non-contact non-wear detection for detected object, in which the ultrasonic wave is mechanical wave whose vibration frequency is higher than 20KHz, and it has the characteristics of high frequency, short wavelength, small diffraction phenomenon, specially good directivity, and can be used as ray to make directional propagation. Therefore, the ultrasonic sensor can detect transparent or colored objects, metal or nonmetal objects, solid, liquid and powdery substances, especially opaque solids in sunlight. The detection performance is hardly affected by any environmental conditions, including a smoke environment and rainy days. Based on the advantages of the ultrasonic sensor, people apply the ultrasonic sensor to the metering of gas, measure the flow rate of the gas by adopting the time difference principle, and reflect the flow rate of the fluid by measuring the difference of the forward and backward flow propagation time speeds of the ultrasonic signal in the fluid. The time difference method has the advantages of small error caused by the change of the sound velocity along with the temperature of the fluid, high accuracy and wide application at present.

Although the ultrasonic sensor measures accurately, research shows that due to the fact that turbulent flow exists in the ultrasonic gas meter or due to the fact that impurities exist in the gas, the gas flow is unstable, and therefore a certain error or fluctuation exists in the difference value between the forward flow time and the reverse flow time measured by the ultrasonic sensor, further the metering data of the ultrasonic gas meter is inaccurate, and the metering precision is reduced.

Disclosure of Invention

In view of the above defects, an object of the present invention is to provide a metering component for an ultrasonic gas meter and a gas meter provided with the same, which have good rectification effects, can effectively eliminate turbulence phenomenon and unstable gas flow caused by impurities, and have accurate metering data and high metering precision.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

a metering component for an ultrasonic gas meter comprises a gas flow channel, wherein one end of the gas flow channel is provided with a gas inlet hole, and an ultrasonic sensor is arranged on the gas flow channel; the gas flow channel is of a circular cylindrical structure, and a rectifying component is arranged between the gas inlet and the ultrasonic sensor; the end part of the gas flow passage, which is provided with the gas inlet hole, is provided with a flow blocking part, and the gas inlet hole is arranged on the flow blocking part.

The rectifying component comprises a cylindrical shell, and a plurality of axially extending gas channels are arranged in the shell; the gas channel comprises an inner gas channel which is positioned in the center of the shell and is formed by an octagon surrounded by circumferential clapboards, and also comprises a plurality of outer gas channels which are surrounded on the circumferential side of the inner gas channel, and each outer gas channel is formed by a plurality of radial clapboards which are connected between the corners of the circumferential clapboards and the shell.

The gas flow channel is provided with a gas flow baffle, the gas flow baffle comprises a gas flow channel and a fixing ring, the gas flow baffle is fixed with the gas flow channel, a plurality of connecting arms are connected between the gas flow baffle and the fixing ring, and the gas inlet is formed among the fixing ring, the gas flow baffle and each connecting arm.

Wherein the diameter of the flow baffle is slightly larger than that of the rectifying component.

The gas flow channel comprises a first constant-diameter part, the first constant-diameter part is communicated with a first reducing part, the first reducing part is communicated with a reducing flow channel, the reducing flow channel is communicated with an expanding part, the expanding part is communicated with a second constant-diameter part, the flow blocking part is fixed on the inner side of the first constant-diameter part, the rectifying part is installed in the reducing flow channel, and the ultrasonic sensor is installed on the second constant-diameter part; the second constant-diameter part is communicated with a second reducing part which is communicated with a lower channel, and the lower channel is vertical to the gas flow channel; the lower channel is communicated with a gas outlet of the gas meter.

The inner wall of the second constant-diameter part is provided with a plurality of rectifying plates, the width direction of each rectifying plate is consistent with the radial direction of the second constant-diameter part, and the length direction of each rectifying plate is consistent with the axial direction of the second constant-diameter part; the diameter of a virtual circle formed by connecting the inner side edges of the rectifying plates is smaller than or equal to that of the reducing flow channel.

Wherein, the ultrasonic sensor is a correlation ultrasonic sensor.

A gas meter comprises a shell, wherein a metering component for the ultrasonic gas meter is arranged in the shell.

After the technical scheme is adopted, the utility model has the beneficial effects that:

the metering component for the ultrasonic gas meter comprises a gas flow channel, wherein one end of the gas flow channel is provided with a gas inlet hole, and an ultrasonic sensor is arranged on the gas flow channel; the gas flow channel is of a circular cylindrical structure, and a rectifying component is arranged between the gas inlet and the ultrasonic sensor; the end part of the gas flow passage, which is provided with the gas inlet hole, is provided with a flow blocking part, and the gas inlet hole is arranged on the flow blocking part. The gas flow channel is changed into a circular cylinder shape, the rectifying component and the flow blocking component are additionally arranged, and the buffer cavity is formed between the flow blocking component and the rectifying component, so that the gas flow is buffered, the gas flow is prevented from directly entering the rectifying component, the gas flow speed is weakened and uniformly distributed, the rectifying effect is further improved, the gas turbulence and the unstable gas flow caused by impurities can be effectively eliminated, the stability of the gas flow flowing through the gas meter is greatly improved, the error and fluctuation of the difference value of the downstream time and the upstream time measured by the ultrasonic sensor are greatly reduced, the accuracy of the ultrasonic gas meter metering data is improved, and the metering precision of the ultrasonic gas meter is improved.

The ultrasonic gas meter is provided with the metering component, so that the gas meter has accurate metering data and high metering precision.

In summary, the metering component for the ultrasonic gas meter and the gas meter with the metering component solve the technical problem of low metering precision of the gas meter in the prior art, and the metering component for the ultrasonic gas meter and the gas meter with the metering component have accurate metering data and high metering precision.

Drawings

FIG. 1 is a schematic structural diagram of a metering component for an ultrasonic gas meter according to the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic view of the fairing component of FIG. 1;

FIG. 4 is a schematic structural view of the flow blocking member of FIG. 1;

FIG. 5 is a schematic view of the structure of the gas meter of the present invention;

in the figure: 100. the ultrasonic gas meter comprises a metering component 10, a gas flow passage 11, a first constant diameter part 12, a first reducing part 13, a reducing flow passage 14, an expanding part 16, a second constant diameter part 17, a second reducing part 18, a lower channel 20, a rectifying component 22, a shell 24, an outer gas channel 25, an inner gas channel 26, a circumferential partition plate 28, a radial partition plate 30, an ultrasonic sensor 40, a flow blocking component 42, a flow blocking plate 44, a fixing ring 46, a connecting arm 48, an air inlet hole 50, a rectifying plate 60, a shell 62, a gas outlet 64 and a gas inlet.

Detailed Description

The utility model is further illustrated below with reference to the figures and examples.

All the orientations referred to in the present specification are based on the orientations shown in the drawings, and only represent relative positional relationships, not absolute positional relationships.

The first embodiment is as follows:

as shown in fig. 1, a metering component 100 for an ultrasonic gas meter includes a gas flow passage 10, the gas flow passage 10 is communicated with a lower passage 18, and the lower passage 18 is communicated with a gas outlet 62 (see fig. 5) of the gas meter. The radial section of the preferred gas runner 10 of this embodiment is circular, and the gas runner 10 is circular tubular structure promptly, designs into gas runner 10 circularly more and is convenient for the rectification, is favorable to improving measurement accuracy, easily installs and fixes a position simultaneously, can improve manufacturability and uniformity, improves production efficiency. The lower channel 18 is preferably perpendicular to the gas flow channel 10 in this embodiment.

As shown in fig. 1, an inlet hole 48 is formed at one end of the gas flow passage 10, and gas enters the gas flow passage 10 through the inlet hole 48. The gas flow passage 10 includes a first constant-diameter portion 11 at an end portion, and the intake holes 48 are provided at the end portion of the first constant-diameter portion 11. The first constant diameter portion 11 is communicated with a first reduced diameter portion 12, the first reduced diameter portion 12 is communicated with a reduced diameter flow passage 13, the reduced diameter flow passage 13 is communicated with an expanded diameter portion 14, the expanded diameter portion 14 is communicated with a second constant diameter portion 16, the second constant diameter portion 16 is communicated with a second reduced diameter portion 17, and the second reduced diameter portion 17 is communicated with a lower channel 18. In the present embodiment, it is preferable that the diameter of the reduced diameter flow path 13 is smaller than the diameter of the first constant diameter portion 11, and the diameter of the first constant diameter portion 11 is smaller than the diameter of the second constant diameter portion 16.

As shown in fig. 1, the ultrasonic sensor 30 is attached to the gas flow passage 10, and in the present embodiment, the ultrasonic sensor 30 is preferably attached to the second constant diameter portion 16, and more preferably, the ultrasonic sensor 30 is a direct-emission ultrasonic sensor. The ultrasonic stroke of the correlation ultrasonic sensor is short, so that the reflection time can be reduced, and the measurement precision of the ultrasonic sensor can be improved.

As shown in fig. 1, the flow regulating member 20 is provided between the air intake hole 48 and the ultrasonic sensor 30, and in the present embodiment, the flow regulating member 20 is preferably installed in the reduced diameter flow passage 13. The gas flow channel 10 adopts a structure of reducing diameter and then expanding diameter, and the rectifying part 20 is additionally arranged at the reducing position, so that the rectifying effect can be effectively improved, and the turbulence of gas and unstable gas flow caused by impurities can be eliminated.

As shown in fig. 1 and 3, the flow straightening member 20 has a cylindrical structure. The rectifying member 20 includes a cylindrical housing 22, and a plurality of axially extending gas passages are provided in a space surrounded by the housing 22. The gas passages include an inner gas passage 25 surrounded by a circumferential partition 26 at the center of the casing 22, and in this embodiment, the radial cross section of the circumferential partition 26 is preferably octagonal, and further, the radial cross section of the circumferential partition 26 is preferably regular octagonal, so that the inner gas passage 25 surrounded by the circumferential partition 26 is a regular octagonal gas passage. The gas channel further comprises a plurality of outer gas channels 24 surrounding the inner gas channel 25, each outer gas channel 24 is divided by a plurality of radial partitions 28 connected between the corners of the circumferential partition 26 and the casing 22, that is, eight outer gas channels 24 are provided, and each outer gas channel 24 is surrounded by one edge of the circumferential partition 26, two adjacent radial partitions 28 and the casing 22. Design into interior gas passage 25 with rectification part 20 and be the octagon to eight outer gas passages 24 are outwards diffused along eight angles of octagon, are favorable to gaseous rectification in the runner, and circular rectification part 20 inner space is big, is favorable to gaseous even subsection, can reduce piling up of static dust, does benefit to the rectification, can improve gaseous rectification effect, and the dismouting in reducible later stage is maintained.

As shown in fig. 1 and 4, the gas flow path 10 is provided with the baffle member 40 at the end portion thereof provided with the gas inlet hole 48, that is, the baffle member 40 is fixed inside the end portion of the first constant diameter portion 11, and the gas inlet hole 48 is provided in the baffle member 40. The flow blocking member 40 includes a fixing ring 44, a flow blocking plate 42 is disposed in the fixing ring 44, a plurality of connecting arms 46 are connected between the flow blocking plate 42 and the fixing ring 44, and air inlet holes 48 are formed between the fixing ring 44, the flow blocking plate 42 and each connecting arm 46. The fixing ring 44 is used to fix the gas flow path 10, that is, the fixing ring 44 is fixed to the first constant diameter portion 11. In the present embodiment, it is preferable that the flow blocking plate 42 and the fixing ring 44 are concentric, and the diameter of the flow blocking plate 42 is slightly larger than that of the rectifying member 20. When the gas enters the gas flow channel 10, the baffle plate 42 can block the gas flow to play a role of buffering, and the first constant diameter portion 11 and the first reducing portion 12 form a buffer cavity between the baffle plate 42 and the rectifying part 20, so that the gas flow is buffered, the gas flow is prevented from directly entering the rectifying part 20, the gas flow speed is reduced and is uniformly distributed, and the rectifying effect is further improved.

As shown in fig. 1 and 2, a plurality of flow regulating plates 50 are provided on the inner wall of the second constant-diameter portion 16, the width direction of each flow regulating plate 50 coincides with the radial direction of the second constant-diameter portion 16, and the length direction of each flow regulating plate 50 coincides with the axial direction of the second constant-diameter portion 16, that is, the plane where each flow regulating plate 50 is located intersects the central axis of the second constant-diameter portion 16. In the present embodiment, it is preferable that the diameter of the virtual circle formed by connecting the inner edges of the flow straightening plates 50 is equal to or smaller than the diameter of the reduced diameter flow channel 13, and it is more preferable that the diameter of the virtual circle formed by connecting the inner edges of the flow straightening plates 50 is equal to the diameter of the reduced diameter flow channel 13, that is, the width of each flow straightening plate 50 is equal to and equal to the difference in radius between the second constant diameter portion 16 and the reduced diameter flow channel 13. Each rectifying plate 50 can better rectify the gas at the edge of the measuring flow channel, so that the gas flow at the edge of the measuring flow channel is more stable, and the metering precision can be further improved.

According to the metering component for the gas meter, a gas flow passage adopts a cylindrical structure of reducing diameter and expanding diameter, a rectifying component and a flow blocking component are additionally arranged in the gas flow passage, when gas passes through a buffer space of a circular baffle buffer gas flow inlet, the gas flow speed is weakened and uniformly distributed, the direction of the gas flow is straightened through a circular rectifying device, the direction and the speed of the gas flow flowing into the flow passage are uniform, the gas flow is slowly diffused into the flow passage of an ultrasonic sensor through expanding diameter to be measured, and each rectifying plate can further rectify the gas flow at the edge part of the flow passage, so that a relatively stable gas flow environment is provided for the ultrasonic sensor, the rectifying effect of the gas is improved from multiple dimensions, the metering data of the gas meter is accurate, and the metering precision of the gas meter is improved.

Example two:

as shown in fig. 5, a gas meter includes a housing 60, a gas inlet 64 and a gas outlet 62 are provided on the housing 60, a metering component 100 for an ultrasonic gas meter according to the first embodiment is provided in the housing 60, and a lower channel 18 (see fig. 1) of the metering component 100 for an ultrasonic gas meter is communicated with the gas outlet 62.

The gas meter has the advantages of good rectification effect, accurate metering data and high metering precision.

It should be noted that the nomenclature with reference numbers (such as the first constant diameter unit, the second constant diameter unit, etc.) in this specification is only for distinguishing technical features, and does not represent the positional relationship, the operation sequence, etc. between the features.

The present invention is not limited to the above-described embodiments, and those skilled in the art will be able to make various modifications without creative efforts from the above-described conception, and fall within the scope of the present invention.

Claims

1. The metering component for the ultrasonic gas meter comprises a gas flow channel (10), wherein one end of the gas flow channel (10) is provided with a gas inlet hole (48), and an ultrasonic sensor (30) is arranged on the gas flow channel (10); the ultrasonic sensor is characterized in that the gas flow channel (10) is of a circular cylindrical structure, and a rectifying component (20) is arranged between the gas inlet hole (48) and the ultrasonic sensor (30); the end part of the gas flow passage (10) provided with the gas inlet hole (48) is provided with a flow blocking part (40), and the gas inlet hole (48) is arranged on the flow blocking part (40).

2. The metering component for the ultrasonic gas meter according to claim 1, wherein the rectifying component (20) comprises a cylindrical housing (22), and a plurality of axially extending gas passages are provided in the housing (22); the gas channel comprises an inner gas channel (25) which is positioned in the center of the shell (22) and is surrounded by a circumferential partition plate (26) in an octagonal shape, and the gas channel further comprises a plurality of outer gas channels (24) which are surrounded on the circumferential side of the inner gas channel (25), and each outer gas channel (24) is divided by a plurality of radial partition plates (28) which are connected between the corners of the circumferential partition plate (26) and the shell (22).

3. The metering component for the ultrasonic gas meter according to claim 1, wherein the flow blocking component (40) includes a fixing ring (44) fixed to the gas flow channel (10), a flow blocking plate (42) is disposed in the fixing ring (44), a plurality of connecting arms (46) are connected between the flow blocking plate (42) and the fixing ring (44), and the air inlet holes (48) are formed among the fixing ring (44), the flow blocking plate (42) and each of the connecting arms (46).

4. The metering component for the ultrasonic gas meter according to claim 3, wherein the diameter of the baffle plate (42) is slightly larger than the diameter of the rectifying component (20).

5. The metering member for the ultrasonic gas meter according to claim 3, wherein the gas flow path (10) includes a first constant diameter portion (11), the first constant diameter portion (11) communicates with a first reduced diameter portion (12), the first reduced diameter portion (12) communicates with a reduced diameter flow path (13), the reduced diameter flow path (13) communicates with an enlarged diameter portion (14), the enlarged diameter portion (14) communicates with a second constant diameter portion (16), the flow blocking member (40) is fixed to an inner side of the first constant diameter portion (11), the flow rectifying member (20) is mounted in the reduced diameter flow path (13), and the ultrasonic sensor (30) is mounted on the second constant diameter portion (16); the second constant-diameter part (16) is communicated with a second reducing part (17), the second reducing part (17) is communicated with a lower channel (18), and the lower channel (18) is perpendicular to the gas flow channel (10); the lower channel (18) is communicated with a gas outlet (62) of the gas meter.

6. The metering member for an ultrasonic gas meter according to claim 5, wherein a plurality of flow straightening plates (50) are provided on an inner wall of the second constant-diameter portion (16), a width direction of each flow straightening plate (50) coincides with a radial direction of the second constant-diameter portion (16), and a length direction of each flow straightening plate (50) coincides with an axial direction of the second constant-diameter portion (16); the diameter of a virtual circle formed by connecting the inner sides of the rectifying plates (50) is smaller than or equal to the diameter of the reducing flow channel (13).

7. The metering component for an ultrasonic gas meter according to claim 1, wherein the ultrasonic sensor (30) is a correlation ultrasonic sensor.

8. Gas meter, comprising a housing (60), characterized in that, a metering component (100) for an ultrasonic gas meter according to any one of claims 1 to 7 is arranged in the housing (60).