CN220649640U - Rectifying component, flowmeter, rectifying device and flowmeter device - Google Patents

Abstract

The application provides a rectifying component, flowmeter, fairing and flowmeter device relates to rectification technical field. The fairing assembly comprises a first fairing and a fairing, the fairing assembly is provided with a first end and a second end along a first direction, the closed end of the fairing is close to the first end, and the opening of the fairing is close to the second end. One end of the first rectifying piece is arranged in the air guide sleeve. Along the second direction, a first gap is formed between the guide cover and the inner wall of the fluid flow channel, a second gap is formed between the guide cover and the first rectifying piece, and the area where the first gap is located is communicated with the area where the second gap is located through an opening of the guide cover. The air guide sleeve comprises an air guide part which extends along a first direction and is close to the first end. The rectifying component, the flowmeter, the rectifying device and the flowmeter device can effectively arrange the flow field, so that the flow field entering the metering section is stable and uniform, and the metering accuracy is improved.

Description

Rectifying component, flowmeter, rectifying device and flowmeter device

Technical Field

The application relates to the technical field of rectification, in particular to a rectifying component, a flowmeter, a rectifying device and a flowmeter device.

Background

An ultrasonic flowmeter is an instrument for measuring flow by detecting the action of fluid flow on an ultrasonic beam (or ultrasonic pulse), and has high correlation between the metering accuracy of the ultrasonic flowmeter and the distribution condition of a gas flow field. In the use process, the device is limited by factors such as a bent pipe, a flow regulating valve, a pressure regulating device and the like in the pipeline or the influence of pressure outside the pipeline, so that various fluctuation exists in the fluid in the pipeline, and the gas flow field is difficult to reach a stable state, namely, the actual distribution and the ideal distribution of the gas flow field have larger deviation, and the metering accuracy of the ultrasonic flowmeter is further reduced. Therefore, how to improve the measurement accuracy of the ultrasonic flowmeter is an integral problem to be solved.

Disclosure of Invention

The utility model provides a rectifying component, flowmeter, fairing and flowmeter device can improve the measurement accuracy.

In order to achieve the above object, the present application provides the following technical solutions:

in a first aspect, the present application provides a fairing assembly for placement within a fluid flow path, the fairing assembly comprising a first fairing and a pod; defining an axial direction of the fairing assembly as a first direction, wherein the fairing assembly has a first end and a second end along the first direction, a closed end of the fairing is adjacent to the first end, and an opening of the fairing is adjacent to the second end; one end of the first rectifying piece is arranged in the air guide sleeve; defining a direction perpendicular to the axial direction of the fairing assembly as a second direction, wherein a first gap is formed between the air guide sleeve and the inner wall of the fluid flow channel along the second direction, a second gap is formed between the air guide sleeve and the first fairing, and the area where the first gap is located is communicated with the area where the second gap is located through an opening of the air guide sleeve; the air guide sleeve comprises an air guide part, the air guide part extends along the first direction and is close to the first end, and the first gap at least comprises a gap between the air guide part and the inner wall of the fluid flow channel in the second direction.

In a possible implementation manner of the above rectifying assembly, the flow guiding portion includes a tapered section extending in the first direction, and an outer diameter of the tapered section gradually increases in a direction from the first end toward the second end.

In one possible implementation manner of the above rectifying assembly, the flow guiding portion further includes an arc-shaped section, along the first direction, the arc-shaped section is close to the first end, the arc-shaped section is connected to the small end of the conical section, and the large end of the conical section is close to the second end.

In a possible implementation manner of the above fairing assembly, the fairing further includes a tubular portion, the small end of the conical section is adjacent to the first end along the first direction, the large end of the conical section is connected to one end of the tubular portion, and the other end of the tubular portion is adjacent to the second end.

In one possible implementation manner of the above fairing assembly, the first fairing includes at least one first fairing hole, and the at least one first fairing hole is disposed inside the fairing.

In one possible implementation manner of the above fairing assembly, the first fairing includes a cylindrical portion, and along the first direction, an end of the cylindrical portion near the closed end of the air guide sleeve has an opening, where the opening is the first fairing hole.

In one possible implementation manner of the above fairing assembly, the cylindrical portion has a closed end, the closed end is disposed inside the air guide sleeve, and the closed end of the cylindrical portion and a side wall of the cylindrical portion have the first fairing hole.

In one possible implementation manner of the above fairing assembly, the fairing assembly further includes a second fairing, and the second fairing is sleeved on an outer wall of the first fairing and contacts the air guide sleeve. The second rectifying piece comprises a plurality of second rectifying holes, and the area where the first gap is located is communicated with the area where the second gap is located through the plurality of second rectifying holes.

In one possible implementation of the above rectifying assembly, the rectifying assembly further includes at least one of a third rectifying member and a muffler. The third rectifying piece is arranged outside the air guide sleeve and near the closed end of the air guide sleeve, the third rectifying piece is close to the first end, the third rectifying piece comprises a plurality of third rectifying holes, and the third rectifying holes are used for enabling fluid to enter the area where the first gap is located. The silencer is sleeved on the outer wall of the guide sleeve and is respectively contacted with the outer wall of the guide sleeve and the inner wall of the fluid flow channel, the silencer comprises a silencing channel, and the area where the first gap is located is communicated with the area where the second gap is located through the silencing channel.

In one possible implementation manner of the above rectifying assembly, the fluid flow channel includes a first flow channel section, a second flow channel section, and a third flow channel section sequentially connected along the first direction, an inner diameter of the second flow channel section gradually increases along a direction from the first end toward the second end, and an inner diameter of the first flow channel section is smaller than an inner diameter of the third flow channel section. The rectifying component comprises a third rectifying part and a muffler, the third rectifying part is fixedly connected to the closed end of the air guide sleeve and arranged in the first flow passage section, the outer diameter of the third rectifying part is smaller than that of the muffler, and the muffler is arranged in the third flow passage section.

In a second aspect, the present application also provides a flow meter comprising a flow meter body and a fairing assembly as set forth in any one of the first aspects. The flowmeter body is provided with a fluid flow channel for fluid to flow, the rectifying component is arranged in the fluid flow channel, and the first end of the rectifying component is close to the inlet of the fluid flow channel.

In a third aspect, the present application also provides a fairing comprising a fairing housing and a fairing assembly as claimed in any one of the first aspects. The inner wall of the fairing housing defines a fluid flow path that accommodates the fairing assembly.

In a fourth aspect, the present application also provides a flow meter device comprising a flow meter and a fairing as set forth in the third aspect. The inlet of the flowmeter is communicated with the outlet of the rectifying device.

The utility model provides a pair of fairing, flowmeter, fairing and flowmeter device, this fairing are used for setting up in the inside of fluid runner, and this fairing includes first fairing and kuppe. Along a first direction, the fairing assembly has a first end and a second end, the closed end of the pod is proximate to the first end, and the opening of the pod is proximate to the second end. One end of the first rectifying piece is arranged in the air guide sleeve. Along the second direction, a first gap is formed between the guide cover and the inner wall of the fluid flow channel, a second gap is formed between the guide cover and the first rectifying piece, and the area where the first gap is located is communicated with the area where the second gap is located through an opening of the guide cover. The air guide sleeve comprises an air guide part, the air guide part extends along a first direction and is close to the first end, and the first gap at least comprises a gap between the air guide part and the inner wall of the fluid flow channel in a second direction. Path of fluid in the fluid flow path through the fairing assembly: from the first end toward the second end, the fluid enters the interior of the first gap under the wind flow of the deflector and then enters the interior of the second gap through the opening of the deflector. The path of the fluid in the rectifying component is similar to an S shape, so that the moving distance of the fluid is prolonged, the fluid form can be fully tidied, and the influence of external pressure fluctuation on the fluid can be reduced. In addition, the flow diversion of the flow diversion part can reduce the phenomena of fast central flow velocity and slow edge flow velocity of fluid in the flow field. In addition, the turbulence phenomenon of the fluid in the flow field can be reduced by the rectification of the first rectifying member. Therefore, the rectifying component provided by the embodiment of the application can realize effective arrangement of the flow field, so that the flow field entering the metering section is stable and uniform, and the metering accuracy is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments or the prior art descriptions, it being obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic perspective view of a flow meter device according to an embodiment of the present application;

fig. 2 is a schematic internal perspective view of a rectifying device according to an embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of the fairing shown in FIG. 2;

FIG. 4 is an exploded view of the fairing shown in FIG. 2;

FIG. 5 is a schematic perspective view of the first fairing of FIG. 2;

FIG. 6 is a cross-sectional view of the first fairing of FIG. 2;

FIG. 7 is a schematic perspective view of the pod of FIG. 2 mated with a third fairing;

FIG. 8 is a front view of the pod of FIG. 2 mated with a third fairing;

FIG. 9 is a cross-sectional view of the pod of FIG. 2 mated with a third fairing;

FIG. 10 is a partial perspective view of the muffler of FIG. 2;

fig. 11 is a cross-sectional view of another rectifying device according to an embodiment of the present application.

Reference numerals illustrate:

100. a rectifying device;

110. a rectifying housing; 111. an intermediate portion; 112. a flange portion; 113. a fluid flow path; 1131. a first flow path section; 1132. a second flow path section; 1133. a third flow path segment;

120. a rectifying assembly;

10. a guide cover; 11. a tubular portion; 12. a flow guiding part; 121. an arc section; 122. a conical section;

20. a first fairing; 21. a first rectifying hole; 22. a cylindrical portion; 23. an annular portion; 24. an inner bore;

30. a second rectifying member; 31. a second rectifying hole;

40. a third fairing; 41. a third rectifying hole;

50. a muffler; 51. a sound damping channel; 52. an inner tube; 53. an outer tube; 54. a first annular rectifying sheet; 55. a second annular rectifying sheet;

60. a first gap; 70. a second gap; 80. a second cavity;

200. a flow meter.

Detailed Description

The metering accuracy of the ultrasonic flowmeter and the distribution condition of the gas flow field have high correlation. In the use process, the device is limited by factors such as a bent pipe, a flow regulating valve, a pressure regulating device and the like in the pipeline or the influence of pressure outside the pipeline, so that various fluctuation exists in the fluid in the pipeline, and the gas flow field is difficult to reach a stable state, namely, the actual distribution and the ideal distribution of the gas flow field have larger deviation, and the metering accuracy of the ultrasonic flowmeter is further reduced. Therefore, how to improve the measurement accuracy of the ultrasonic flowmeter is an integral problem to be solved.

In order to obtain a better flow field, the metering accuracy is improved. In the related art, one way is to set a longer front straight pipe section (at least 5 times of caliber length) at the front end of the ultrasonic flowmeter and a rear straight pipe section with 3 times of caliber length at the rear end, but this way has higher space size requirement on the installation environment, and if the installation site space is narrow, the accuracy of measurement cannot be ensured. In addition, the larger installation space can greatly increase the cost. Or another way is to install a rectifying device, such as an orifice plate, a honeycomb and other rectifiers, on the ultrasonic flowmeter, but this way can only solve the problem of a single flow field, for example, the orifice plate can effectively distribute the flow velocity but can not eliminate the vortex, the honeycomb can effectively eliminate the vortex but has a smaller adjusting effect on the flow velocity, and the flow velocity can not be adjusted while eliminating the vortex.

In view of this, the embodiment of the present application provides a rectifying component 120, a flowmeter 200, a rectifying device 100 and a flowmeter 200 device, which not only can effectively distribute the flow velocity, but also can effectively eliminate the vortex, and realize the effective arrangement of the flow field, so that the flow field entering the metering section is stable and uniform, and the metering accuracy is improved.

Fig. 1 is a schematic perspective view of a flow meter device according to an embodiment of the present application. Referring to fig. 1, a flow meter device according to an embodiment of the present application includes a flow meter 200 and a rectifying device 100. Wherein the inlet of the flow meter 200 is in communication with the outlet of the fairing 100. The fluid flow field entering the flowmeter 200 through the rectifying device 100 is effectively arranged, so that the stability and uniformity of the flow field entering the flow section are improved.

In the present embodiment, an ultrasonic flowmeter is taken as an example of the flowmeter 200. In addition, in the embodiments of the present application, the description will be given taking the gas as an example of the fluid, and thus, the fluid flow field may also be referred to as a gas flow field.

In the present embodiment, the rectifying device 100 includes a rectifying housing 110 and a rectifying assembly 120. Wherein the rectifying housing 110 is adapted to be connected to a housing of the flow meter 200, and an inner wall of the rectifying housing 110 defines a fluid flow channel 113 accommodating the rectifying assembly 120, and an outlet of the fluid flow channel 113 is adapted to be in communication with an inlet of the flow meter 200.

In this embodiment of the present application, rectifying assembly 120 and rectifying housing 110 form rectifying device 100, so that rectifying device 100 and flowmeter 200 are mutually independent, and structural design of flowmeter 200 can be avoided being influenced, versatility of products is effectively improved, maintenance and upgrading of old products are facilitated, and maintenance cost of products is reduced.

However, the fairing assembly 120 may also be located inside the flow meter 200, i.e., the fairing assembly 120 is integrated into the flow meter 200. In one possible implementation, embodiments of the present application provide a flow meter 200, the flow meter 200 including a flow meter body and a fairing assembly 120. The flowmeter body is provided with a fluid flow channel 113 for gas to flow, the rectifying component 120 is arranged in the fluid flow channel 113, and the closed end of the air guide sleeve 10 of the rectifying component 120 is close to the inlet of the fluid flow channel 113. By doing so, the installation space required for arranging the fairing assembly 120 can be eliminated, and in addition, the requirement for the installation space can be reduced while the metering accuracy of the flowmeter 200 is improved.

The rectifying assembly 120 and the rectifying device 100 according to the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Fig. 2 is a schematic internal perspective view of a rectifying device 100 according to an embodiment of the present application, fig. 3 is a cross-section of the rectifying device 100 shown in fig. 2, and fig. 4 is an exploded view of the rectifying device 100 shown in fig. 2. As shown in fig. 2 to 4, the rectifying device 100 provided in the embodiment of the present application includes a rectifying housing 110 and a rectifying component 120. Wherein the inner wall of the rectifying housing 110 defines a fluid flow passage 113 of a hollow structure, one opening of the fluid flow passage 113 is used as an inlet for gas to enter, and the other opening of the fluid flow passage 113 is used as an outlet for gas to flow out and is used to communicate with the inlet of the flow meter 200.

In the embodiment of the present application, the structure of the rectifying casing 110 is not limited here. Illustratively, as shown in connection with fig. 2-4, the fairing housing 110 includes a hollow center portion 111 and two flange portions 112. Wherein, two flange portions 112 are respectively sleeved on the outer walls of the opposite ends of the middle portion 111, the two flange portions 112 are used for fixing the rectifying device 100, and one flange portion 112 is used for being connected with the casing of the flowmeter 200. The inner wall of the intermediate portion 111 defines a fluid flow passage 113 such that the fairing assembly 120 is disposed within the interior of the intermediate portion 111.

In this embodiment, the axial direction of the rectifying element 120 is defined as a first direction (X direction in fig. 3), and a direction perpendicular to the axial direction of the rectifying element 120 is defined as a second direction (Y direction in fig. 3), and along the first direction, the rectifying element 120 has a first end and a second end, the first end is close to the inlet of the fluid flow channel 113, and the second end is close to the outlet of the fluid flow channel 113.

As shown in fig. 2 to 4, the fairing assembly 120 provided in the embodiment of the present application includes a first fairing 20 and a pod 10. Wherein, along the first direction, the closed end of the air guide sleeve 10 is close to the first end, and the opening of the air guide sleeve 10 is close to the second end. One end of the first fairing 20 is disposed inside the pod 10. In the second direction, a first gap 60 is formed between the air guide sleeve 10 and the inner wall of the fluid flow channel 113, a second gap 70 is formed between the air guide sleeve 10 and the first rectifying piece 20, and the area where the first gap 60 is located is communicated with the area where the second gap 70 is located through the opening of the air guide sleeve 10.

With continued reference to fig. 3, the other end of the first fairing 20 is located outside the pod 10 and in contact with the inner wall of the fluid flow path 113 to ensure that gas exiting the region where the first gap 60 is located can enter the second gap 70 through the opening of the pod 10. Of course, in some embodiments, a flow guiding element (not shown) may be disposed around the other end of the first rectifying element 20, so that the gas leaving the first gap 60 enters the second gap 70 through the opening of the air guide sleeve 10.

Referring to the dashed arrows in fig. 3, the flow path of the gas inside the fairing assembly 120: the gas at the first end first enters the first gap 60 and moves in a first direction from the first end toward the second end until it enters the interior of the second gap 70 through the opening of the pod 10 and moves in the first direction toward the second end toward the first end. It is thus understood that the flow path of the gas inside the rectifying assembly 120 is similar to an "S" shape (as the dotted arrow in fig. 3 goes), and not only the length of the rectifying assembly 120 in the first direction can be reduced to contribute to downsizing of the rectifying device 100, but also the flow path of the gas can be prolonged to allow the gas form to be sufficiently sorted, and also the influence of external pressure fluctuation on the fluid can be reduced.

With continued reference to fig. 3, the interior of the pod 10 may have a first cavity including at least the region where the second gap 70 is located, the first cavity communicating with the region where the first gap 60 is located through the opening of the pod 10.

Wherein the first cavity is communicated with the area where the first gap 60 is located through the opening of the air guide sleeve 10 means that the gas leaving the first gap 60 can enter the first cavity through the opening of the air guide sleeve 10, so that the first rectifying member 20 rectifies the gas leaving the first gap 60.

Optionally, with continued reference to fig. 3, the interior of the pod 10 may also have a second cavity 80. The second cavity 80 at least includes a region between the closed end of the air guide sleeve 10 and the first fairing 20, the first cavity is communicated with the second cavity 80, and along a direction from the first end toward the second end, a cross-sectional area of the second cavity 80 is gradually increased, and a cross-sectional area of the second cavity 80 is perpendicular to the first direction. By means of the arrangement, the structure of the air guide sleeve 10 is matched with that of the fluid flow channel 113, the first gap 60 can be a uniform and narrow annular channel, fluid between the air guide sleeve 10 and the fluid flow channel 113 can be fully compressed, the air flow state is fully tidied, and the influence of external pressure fluctuation on the air flow is reduced.

As shown in fig. 3, the cross-sectional area of the second cavity 80 gradually increases in a direction from the first end toward the second end. Of course, in some embodiments, the cross-sectional area of the second cavity 80 may also increase gradually in a direction from the first end toward the second end.

As shown in fig. 3, in the embodiment of the application, the first cavity includes an area where the second gap 70 is located, and along the first direction, the second cavity 80 includes an area between the closed end of the pod 10 and the first fairing 20. Of course, in some embodiments, the first cavity includes the second gap 70 and the second cavity 80 includes the area between the closed end of the pod 10 and the first fairing 20 and the interior of the barrel 22 of the first fairing 20. Alternatively, in one embodiment, the first cavity includes an area where the second gap 70 is located and an interior of the cylindrical portion 22 of the first fairing 20, and the second cavity 80 includes an area between the pod 10 and the first fairing 20.

The first fairing 20 includes at least one first fairing hole 21, where the at least one first fairing hole 21 is disposed inside the pod 10, for example, as shown in fig. 3, and the first fairing 20 includes a plurality of first fairing holes 21 disposed inside the pod 10. The vortex is eliminated after the fluid in the area where the second gap 70 is located passes through the first rectifying hole 21, so that the flow velocity distribution is more uniform, the purpose of rectifying the fluid is realized, and the metering accuracy can be improved.

Fig. 5 is a schematic perspective view of the first fairing 20 of fig. 2. As shown in fig. 2 and 3 in combination, and referring to fig. 5, the first fairing 20 includes a barrel 22. The closed end of the cylindrical portion 22 is disposed inside the air guide sleeve 10, and the second cavity 80 is located between the closed end of the air guide sleeve 10 and the closed end of the cylindrical portion 22 along the first direction, and the closed end of the cylindrical portion 22 and the sidewall of the cylindrical portion 22 have the first rectifying hole 21. By the arrangement, the speed of ensuring that the fluid leaves the rectifying flow passage can be improved, and the flow velocity distribution can be more uniform.

Wherein the cylindrical portion 22 has a cylindrical shape. Of course, the outer shape of the cylindrical portion 22 may be other structures, such as rectangular parallelepiped.

The shape of the closed end of the cylindrical portion 22 and the shape of the first rectifying hole 21 on the side wall may be the same or different, for example, as shown in fig. 2, the closed end of the cylindrical portion 22 and the first rectifying hole 21 on the side wall are circular holes. In addition, the side wall of the cylindrical portion 22 and the inner diameter of the first rectifying hole 21 at the closed end are the same, and uniform flow velocity distribution can be ensured.

As shown in fig. 5, the first rectifying member 20 includes a plurality of first rectifying holes 21, however, the first rectifying member 20 may include one first rectifying hole 21, and the one first rectifying hole 21 may be provided at a closed end or a side wall of the cylindrical portion 22. In one embodiment, the first rectifying element 20 includes a cylindrical portion 22, and along the first direction, an end of the cylindrical portion 22 near the closed end of the air guide sleeve 10 has an opening, where the opening is a first rectifying hole. Wherein the openings may include, but are not limited to, circular holes, square holes, and the like. In one embodiment, when the opening is a circular hole, the inner diameter of the opening may be equal to the inner diameter of the cylindrical portion 22. When the inner diameter of the opening is equal to the inner diameter of the cylindrical portion 22, the cylindrical portion 22 may have a tubular structure with a hollow structure, in other words, the cylindrical portion 22 resembles a hollow circular tube.

Fig. 6 is a cross-sectional view of the first fairing 20 of fig. 2. Referring to fig. 6 in conjunction with fig. 5, the first fairing 20 also includes an annular segment 23. The annular portion 23 is disposed outside the pod 10 and connected to an open end of the cylindrical portion 22, and the inner hole 24 of the annular portion 23 is used for guiding out fluid inside the cylindrical portion 22. The diameter of the inner bore 24 gradually increases in the direction from the first end toward the second end, and the diameter of the small end of the inner bore 24 is the same as the inner diameter of the open end of the cylindrical portion 22. This allows for even diffusion of fluid into the flow meter 200.

The cylindrical portion 22 and the annular portion 23 may be integrally formed, or may be separately formed, for example, by screwing.

Wherein the outer wall of the annular portion 23 is in contact with the inner wall of the fluid flow passage 113 to ensure that gas flowing out of the first gap 60 passes through the opening of the pod 10 into the second gap 70.

Fig. 7 is a schematic perspective view of the pod 10 of fig. 2 and the third fairing 40, fig. 8 is a front view of the pod 10 of fig. 2 and the third fairing 40, and fig. 9 is a cross-sectional view of the pod 10 of fig. 2 and the third fairing 40. As shown in combination with fig. 2 and 3 and referring to fig. 7 to 9, the pod 10 includes a pod 12 and a tubular portion 11. Wherein, along the first direction, the guiding portion 12 is close to the first end and extends along the first direction, one end of the guiding portion 12 is connected with one end of the tubular portion 11, and the other end of the tubular portion 11 is close to the second end. The first gap 60 includes a gap between the flow guiding portion 12 and an inner wall of the fluid flow passage in the second direction and a gap between the tubular portion 11 and the fluid flow passage in the second direction.

The longitudinal section of the tubular portion 11 is circular, so that the distance between the outer wall of the tubular portion 11 and the inner wall of the rectifying housing 110 is the same along the first direction, and a uniform annular channel is ensured between the outer wall of the tubular portion 11 and the inner wall of the rectifying housing 110.

Referring to fig. 3, the portion of the tubular portion 11 extending in the first direction and used for the first fairing 20 may extend the flow path of the fluid within the fairing assembly 120 to improve accuracy of metering.

Referring to fig. 3, since the flow guiding portion 12 is close to the first end and defines a portion of the first gap 60 with the inner wall of the fluid flow channel, during the process of entering the first gap 60, the flow splitting of the flow guiding portion 12 can reduce the phenomena of fast central flow velocity and slow edge flow velocity of the fluid in the flow field, so as to improve the accuracy of metering.

With continued reference to fig. 7-9, the deflector 12 includes an arcuate segment 121 and a tapered segment 122. Wherein the tapered section 122 extends in a first direction, and the tapered section 122 has an outer diameter that gradually increases in a direction from the first end toward the second end. In the first direction, the arcuate segment 121 is connected to and near the small end of the tapered segment 122, and the large end of the tapered segment 122 is connected to and near the second end of the tubular portion 11, and the other end of the tubular portion 11 is near the second end. By the arrangement, the first gap 60 between the air guide sleeve 10 and the fluid flow channel 113 can be a uniform annular channel, and the fluid can be fully compressed, so that the air flow is fully tidied, and the influence of external pressure on the air flow is reduced.

As shown in fig. 8 and 9, the arc-shaped section 121 has a hemispherical shape, and of course, the arc-shaped section 121 may have a fan shape.

As shown in fig. 8 and 9, the flow guiding portion 12 has a bowl-shaped structure, and the cavity inside the flow guiding portion 12 is a part of the second cavity 80, that is, the flow guiding portion 12 has a hollow structure. Of course, the flow guide 12 may be a solid structure. When the flow guiding portion 12 is of a solid structure, only the arc-shaped section 121 may be of a solid structure, or both the arc-shaped section 121 and the tapered section 122 may be of a solid structure.

With continued reference to FIG. 3, the fluid flow channel 113 includes a first flow channel section 1131, a second flow channel section 1132, and a third flow channel section 1133 that are sequentially connected in a first direction, with the inner diameter of the second flow channel section 1132 gradually increasing in a direction from the first end toward the second end, with the inner diameter of the first flow channel section 1131 being smaller than the inner diameter of the third flow channel section 1133. The flow guiding portion 12 of the flow guiding cover 10 is disposed inside the second flow channel section 1132, and the tubular portion 11 is disposed inside the third flow channel section 1133. By this arrangement, the first gap 60 between the pod 10 and the inner wall of the fluid flow path 113 can be formed as a uniform annular channel, thereby sufficiently compressing the fluid.

Wherein the deflector 12 can be matched to the second channel section 1132 of the fluid channel 113 such that the gap between the deflector 12 and the second channel section 1132 is a uniform annular channel.

With continued reference to fig. 3, the fairing assembly 120 also includes a third fairing 40. The third rectifying element 40 is disposed outside the air guide sleeve 10 and connected to the closed end of the air guide sleeve 10, the third rectifying element 40 is close to the first end and disposed inside the first flow channel section 1131, and the third rectifying element 40 includes a plurality of third rectifying holes 41, where the plurality of third rectifying holes 41 are used for allowing fluid to enter the area where the first gap 60 is located. Accordingly, by providing the third rectifying member 40 having the third rectifying hole 41, the problems of the rapid center flow rate and the slow edge flow rate can be improved, a flow field with a more uniform flow rate can be obtained, and the vortex can be effectively eliminated.

Here, the structure of the third rectifying member 40 is not limited. The third rectifying member 40 may be of a circular plate-like structure, and the plurality of third rectifying holes 41 are uniformly arranged in the third rectifying member 40. By this arrangement, not only is swirl eliminated, but the flow rate is distributed more evenly.

The first end of the third fairing 40 is fixedly connected with the closed end of the fairing 10, and the second end of the third fairing 40 is connected with the fairing housing 110, so that not only the fixing difficulty of the fairing 10 can be reduced, but also the assembly efficiency of the fairing 100 can be improved. Of course, in addition to the third fairing 40 being fixedly connected to the pod 10, the third fairing 40 may also be in contact with the closed end of the pod 10 or spaced apart from the closed end of the pod 10 along the first direction.

In this embodiment, the third rectifying element 40 includes a plurality of rectifying groups, each of which includes a plurality of third rectifying holes 41 surrounding the axis of the air guide sleeve 10, and the inner diameters and center distances of the third rectifying holes 41 of two adjacent groups are different. The center-to-center distance refers to a distance between centers of two third rectifying holes 41 adjacent in the first direction in the same group of rectification.

In this embodiment, the inner diameters, the number and the center distance of the third rectifying holes 41 of the multiple rectifying groups gradually decrease, increase, and increase from inside to outside in the second direction.

With continued reference to fig. 3, the fairing assembly 120 also includes a muffler 50. The muffler 50 is sleeved on the outer wall of the air guide sleeve 10 and is respectively contacted with the outer wall of the air guide sleeve 10 and the inner wall of the fluid flow channel 113, the outer diameter of the muffler 50 is larger than that of the third rectifying part 40 and is arranged in the third flow channel section 1133, the muffler 50 comprises a silencing channel 51, and the area where the first gap 60 is located is communicated with the area where the second gap 70 is located through the silencing channel 51. By so doing, the influence of the front-end pressure fluctuation of the muffler 50 can be further eliminated, so that the noise present is further eliminated.

Wherein the cross section of the sound damping channel 51 is wave-shaped, and the cross section of the sound damping channel 51 is parallel to the first direction. In addition, the extending direction of the muffler channel 51 is parallel to the first direction.

Since the pod 10 is composed of the flow guiding portion 1212 and the tubular portion 11, the muffler 50 is correspondingly sleeved on the outer wall of the tubular portion 11 and contacts the outer wall of the tubular portion 11 and the inner wall of the rectifying casing 110. In addition, the length of the muffler 50 is equal to the length of the tubular portion 11 in the first direction, and the sound-deadening effect can be improved. Of course, the length of the muffler 50 may be smaller or larger than the length of the tubular portion 11.

In the embodiment of the present application, no limitation is made here as to the specific structure of the muffler 50.

Fig. 10 is a partial perspective view of the muffler 50 of fig. 2. Illustratively, referring to fig. 10, the muffler 50 may include an inner pipe 52, an outer pipe 53, a plurality of first annular fairings 54, and a plurality of second annular fairings 55. Wherein, along the second direction, the outer pipe 53 and the inner pipe 52 are spaced around the pod 10, and the pod 10 contacts the inner pipe 52. The first annular rectifying pieces 54 and the second annular rectifying pieces 55 are arranged between the inner pipe fitting 52 and the outer pipe fitting 53, the first annular rectifying pieces 54 are connected to the inner pipe fitting 52, the second annular rectifying pieces 55 are connected to the outer pipe fitting 53, and the first annular rectifying pieces 54 and the second annular rectifying pieces 55 encircle the air guide sleeve 10. The plurality of first annular rectifying pieces 54 and the plurality of second annular rectifying pieces 55 are alternately arranged in the first direction with gaps between adjacent first annular rectifying pieces 54 and second annular rectifying pieces 55. The inner tube 52, the outer tube 53, the first annular fairing 54, and the second annular fairing 55 together define the above-described sound damping channel 51.

Fig. 11 is a cross-sectional view of another rectifying device 100 according to an embodiment of the present application. Fig. 10 differs from fig. 3 in that the fairing assembly 120 can also include a second fairing 30. The fairing assembly 120 further includes a second fairing 30, where the second fairing 30 is sleeved on the outer wall of the first fairing 20 and contacts the pod 10. The second rectifying member 30 includes a plurality of second rectifying holes 31, and the region where the first gap 60 is located communicates with the region where the second gap 70 is located through the plurality of second rectifying holes 31. By this arrangement, the rectifying effect can be further improved.

The second rectifying element 30 is disposed outside the air guide sleeve 10 and contacts with the end surface of the air guide sleeve 10, and along the second direction, the projection of the air guide sleeve 10 covers all the projections of the second rectifying holes 31. Of course, the second fairing 30 may also be disposed inside the pod 10 and in contact with the inner wall of the pod 10.

Here, the structure of the second rectifying member 30 is not limited. Illustratively, as shown in fig. 11, the second rectification is in a ring-shaped plate-like structure.

The axial direction of the second rectifying hole 31 is parallel to the first direction, so that the fluid is ensured to flow along the flow direction of the rectifying flow channel. The second rectifying holes 31 are uniformly formed in the second rectifying member 30, so as to ensure the stability of the flow field.

Wherein, along the first direction, the projection of the air guide sleeve 10 covers the projection of the second rectifying part 30, so that the second rectifying part 30 can avoid affecting the fluid to leave from between the air guide sleeve 10 and the fluid flow channel 113.

As shown in fig. 11, the muffler 50 and the second rectifying member 30 exist at the same time, however, in some embodiments, the muffler 50 may be omitted, i.e., only the second rectifying member 30 may be provided.

The parallel, vertical, numerical and numerical ranges referred to in the embodiments of the present application are approximations, and may be subject to a range of errors, which may be considered negligible by those skilled in the art, due to the manufacturing process.

In the description of the embodiments of the present application, it should be understood that the terms "top," "bottom," "upper," "lower," "left," "right," "vertical," "horizontal," and the like indicate an orientation or a positional relationship, if any, based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the embodiments of the present application and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can lead the interior of two elements to be communicated or lead the two elements to be in interaction relationship. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims (13)

1. A rectifying assembly, wherein the rectifying assembly is arranged in a fluid flow channel, and the rectifying assembly comprises a first rectifying piece and a guide cover;

defining an axial direction of the fairing assembly as a first direction, wherein the fairing assembly has a first end and a second end along the first direction, a closed end of the fairing is adjacent to the first end, and an opening of the fairing is adjacent to the second end; one end of the first rectifying piece is arranged in the air guide sleeve;

defining a direction perpendicular to the axial direction of the fairing assembly as a second direction, wherein a first gap is formed between the air guide sleeve and the inner wall of the fluid flow channel along the second direction, a second gap is formed between the air guide sleeve and the first fairing, and the area where the first gap is located is communicated with the area where the second gap is located through an opening of the air guide sleeve;

the air guide sleeve comprises an air guide part, the air guide part extends along the first direction and is close to the first end, and the first gap at least comprises a gap between the air guide part and the inner wall of the fluid flow channel in the second direction.

2. The fairing assembly of claim 1, wherein said flow guide includes a tapered section extending in said first direction, said tapered section having an outer diameter that gradually increases in a direction from said first end toward said second end.

3. The fairing assembly of claim 2, wherein said flow guide further comprises an arcuate segment, said arcuate segment being adjacent said first end in said first direction, said arcuate segment being connected to a small end of said tapered segment, a large end of said tapered segment being adjacent said second end.

4. The fairing assembly as recited in claim 2, wherein said fairing further comprises a tubular portion, said smaller end of said tapered section being adjacent said first end in said first direction, said larger end of said tapered section being connected to one end of said tubular portion, and said other end of said tubular portion being adjacent said second end.

5. The fairing assembly of any one of claims 1-4, wherein the first fairing comprises at least one first fairing aperture disposed inside the pod.

6. The fairing assembly as recited in claim 5, wherein said first fairing comprises a cylindrical portion having an opening at an end of said cylindrical portion proximate to a closed end of said pod in said first direction, said opening being said first fairing aperture; or,

the tubular part is provided with a closed end, the closed end is arranged in the air guide sleeve, and the closed end of the tubular part and the side wall of the tubular part are provided with the first rectifying hole.

7. The fairing assembly of claim 6, wherein the first fairing further comprises an annular portion disposed on an exterior of the pod and coupled to the open end of the barrel, an interior bore of the annular portion for directing fluid from an interior of the barrel, wherein:

the diameter of the inner hole gradually increases along the direction from the first end to the second end, and the diameter of the small end of the inner hole is the same as the inner diameter of the opening end of the cylindrical part.

8. The fairing assembly of any one of claims 1-4, further comprising a second fairing that is nested on an outer wall of the first fairing and in contact with the pod;

the second rectifying piece comprises a plurality of second rectifying holes, and the area where the first gap is located is communicated with the area where the second gap is located through the plurality of second rectifying holes.

9. The fairing assembly of any one of claims 1-4, further comprising at least one of a third fairing and a muffler, wherein:

the third rectifying piece is arranged outside the air guide sleeve and near the closed end of the air guide sleeve, the third rectifying piece is close to the first end, and the third rectifying piece comprises a plurality of third rectifying holes which are used for allowing fluid to enter the area where the first gap is located;

the silencer is sleeved on the outer wall of the guide sleeve and is respectively contacted with the outer wall of the guide sleeve and the inner wall of the fluid flow channel, the silencer comprises a silencing channel, and the area where the first gap is located is communicated with the area where the second gap is located through the silencing channel.

10. The fairing assembly of claim 9, wherein said fluid flow path comprises a first flow path segment, a second flow path segment, and a third flow path segment connected in sequence along said first direction, said second flow path segment having an inner diameter that progressively increases along said first end toward said second end, said first flow path segment having an inner diameter that is less than an inner diameter of said third flow path segment;

the rectifying component comprises a third rectifying part and a muffler, the third rectifying part is fixedly connected to the closed end of the air guide sleeve and arranged in the first flow passage section, the outer diameter of the third rectifying part is smaller than that of the muffler, and the muffler is arranged in the third flow passage section.

11. A flow meter comprising a flow meter body and the fairing assembly of any of claims 1 to 10;

the flowmeter body is provided with a fluid flow channel for fluid to flow, the rectifying component is arranged in the fluid flow channel, and the first end of the rectifying component is close to the inlet of the fluid flow channel.

12. A rectifying device comprising a rectifying housing and a rectifying assembly according to any one of claims 1 to 10;

the inner wall of the fairing housing defines a fluid flow path that accommodates the fairing assembly.

13. A flow meter apparatus comprising a flow meter and the fairing of claim 12;

the inlet of the flowmeter is communicated with the outlet of the rectifying device.