CN218097888U - Low-temperature liquid Coriolis mass flowmeter - Google Patents

Abstract

The utility model discloses a low temperature liquid Coriolis mass flowmeter belongs to Coriolis force mass flowmeter field, and it includes branch fluid, pipeline, flange and expansion joint, the expansion joint sets up on the flange, the flange is with the interface connection who divides the fluid, the pipe sleeve is established in the flange and through flange and the interface connection who divides the fluid. The utility model discloses can solve current flowmeter and be not suitable for the low temperature situation, the unable problem that compensates is carried out to stress of material shrink.

Description

Low-temperature liquid Coriolis mass flowmeter

Technical Field

The utility model belongs to the Coriolis force mass flow meter field, concretely relates to low temperature liquid Coriolis mass flow meter.

Background

The Coriolis mass flowmeter is a device for directly measuring mass flow by using the Coriolis force principle that when fluid flows in a vibrating pipeline, the Coriolis force is generated and is in direct proportion to the mass flow, and the device consists of a flow detection element and a converter. The Coriolis mass flowmeter realizes direct measurement of mass flow, has the characteristics of high precision and capability of measuring multiple media and multiple process parameters, and is widely applied to industries such as petrifaction, pharmacy, food and the like.

The inventor finds that the prior arts at least have the following technical problems in the practical use process:

the material can shrink when low temperature and produce structural stress, and current flowmeter is not suitable for the low temperature situation, can't compensate stress.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects existing in the prior art, the inventor of the utility model continuously reforms and innovates through long-term exploration attempts and multiple experiments and efforts, and provides a low-temperature liquid Coriolis mass flowmeter, which can solve the problem that the existing flowmeter is not suitable for the low-temperature condition and the material shrinkage can not compensate the stress.

In order to realize the purpose, the utility model adopts the technical scheme that: the Coriolis mass flowmeter for the low-temperature liquid comprises a flow dividing body, a pipeline, a flange and an expansion joint, wherein the expansion joint is arranged on the flange, the flange is connected with an interface of the flow dividing body, and the pipeline is sleeved in the flange and is connected with the interface of the flow dividing body through the flange.

According to the utility model discloses a cryogenic liquids coriolis mass flowmeter, its further preferred technical scheme is: the flange includes male flange and female flange, female flange includes: the female joint is connected to the interface; the female flange plate is sleeved outside the pipeline; two ends of the female sleeve are respectively fixedly connected with the female joint and the female flange plate and sleeved outside the pipeline; the male flange includes: the male connector is inserted on the female connector; the male flange plate is connected to one side of the female flange plate; and the two ends of the male sleeve are fixedly connected with a male connector and a male flange plate and are sleeved between the female sleeve and the pipeline.

According to the utility model discloses a low temperature liquid coriolis mass flowmeter, its further preferred technical scheme is: the expansion joint is disposed between a female sleeve and a female joint, the expansion joint comprising: the connecting ring is sleeved on the female sleeve and the female joint respectively; and the elastic piece is arranged between the two connecting rings.

According to the utility model discloses a low temperature liquid coriolis mass flowmeter, its further preferred technical scheme is: the protective cover is sleeved on the connecting ring, one end of the protective cover is fixedly connected with the connecting ring on one side, and the other end of the protective cover is in clearance fit with the connecting ring on the other side.

According to the utility model discloses a low temperature liquid coriolis mass flowmeter, its further preferred technical scheme is: the cross section of the connecting ring is of an L-shaped structure.

According to the utility model discloses a cryogenic liquids coriolis mass flowmeter, its further preferred technical scheme is: the pipeline divide into import pipe and outlet pipe, the reposition of redundant personnel includes: a main body; the interface is arranged on the main body and is divided into an inlet connected with the inlet pipe and an outlet connected with the outlet pipe; the double-row measuring tube is provided with a driving coil and a detection coil, and two ends of the double-row measuring tube are connected with the main body and are connected with the inlet tube and the outlet tube through the main body to form a passage.

According to the utility model discloses a cryogenic liquids coriolis mass flowmeter, its further preferred technical scheme is: and the double-row measuring pipe is also provided with a fixed block.

Compared with the prior art, the technical scheme of the utility model have following advantage beneficial effect:

the utility model discloses in, be provided with the expansion joint on the flange, each part contracts under the low temperature situation, and the expansion joint is flexible warp, carries out axial length compensation, prevents flange and the junction stress concentration who divides the fluid, prevents simultaneously that stress is too big, leads to dividing the deformation of the internal pipeline of fluid, influences measurement accuracy.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic cross-sectional view of a coriolis mass flowmeter for a cryogenic liquid according to the present invention.

Fig. 2 is a schematic side view of the flow divider of the present invention.

Fig. 3 is a schematic view of the connection structure of the expansion joint and the flange of the present invention.

The labels in the figure are respectively: 3, an expansion joint; an inlet pipe 11, a split fluid 12 and an outlet pipe 13; 121 main body, 122 interface, 123 double-row measuring tube, 124 driving coil, 125 detecting coil and 129 fixing block; 1221 inlet, 1222 outlet; 23 male flanges and 24 female flanges; 231 male connector, 232 male flange, 233 male sleeve; 241 female joint, 242 female flange and 243 female sleeve; 31 connecting rings, 32 elastic pieces and 33 protective covers.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Thus, the detailed description of the embodiments of the present invention provided below is not intended to limit the scope of the claimed invention, but is merely representative of selected embodiments of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

Example (b):

as shown in fig. 1, a cryogenic liquid coriolis mass flowmeter comprises: piping, expansion joint 3, flanges and a shunt 12 for measurement. The pipeline is connected with a flow distribution body 12, and the pipeline is divided into: an inlet pipe 11 and an outlet pipe 13, wherein the low-temperature liquid enters the flow splitting body 12 from the inlet pipe 11 and then flows out from the outlet pipe 13.

The cryogenic liquid may be liquid hydrogen, liquid nitrogen, liquid oxygen, liquefied natural gas, or other cryogenic liquid. This example will be described with reference to liquid hydrogen.

As shown in fig. 2, the flow distribution body 12 includes: main part 121, interface 122 and double measuring pipe 123, interface 122 sets up on main part 121, interface 122 divide into import 1221 and export 1222, and import pipe 11 is connected with import 1221, outlet pipe 13 is connected with export 1222, double measuring pipe 123 comprises two pipelines, and its both ends draw close each other and set up on main part 121, make double measuring pipe 123 form the triangle-shaped structure, and its both ends communicate with import pipe 11 and outlet pipe 13 respectively, and liquid hydrogen loops through import pipe 11, main part 121's import 1221, double measuring pipe 123 and main part 121's export 1222 promptly. The two ends of the double-row measurement pipe 123 adopt the fixing blocks 129 to clamp and position the two parallel measurement pipes, the drive coil 124 is installed in the middle of the double-row measurement pipe 123, the detection coils 125 are respectively arranged at two corners of a triangle on the double-row measurement pipe 123, the magnetic steel and the detection coils 125 need to be installed on the detection coils 125, the phase difference is measured, the mass flow is obtained, and the measurement of the mass flow is the prior art, so detailed description is omitted.

The present invention is provided with a coil bobbin that constitutes the detection coil 125 and the drive coil 124, and a material such as an adhesive and an adhesive tape that needs to be used, and a material suitable for low temperature. For example, DW-3 is adopted as the adhesive, and polyimide is adopted as the low-temperature material related to the measurement pipe accessory.

The flange includes male flange 23 and female flange 24, male flange 23 pegs graft in female flange 24, female flange 24 includes: the pipe joint comprises a female joint 241, a female flange 242 and a female sleeve 243, wherein the female joint 241 is installed at the joint, the female sleeve 243 is arranged at one end far away from the female joint 241, the female sleeve 243 is sleeved outside the pipe, and the other end of the female sleeve 243 is fixedly connected with the female flange 242. The male flange 23 includes: the male flange plate 232 is arranged on one side, away from the flow dividing body, of the female flange plate 242, the male sleeve 233 is arranged on the male flange plate 232, and the other end of the male sleeve 233 is fixedly connected with the male connector 231. The male connector 231 and the male sleeve 233 form an extending structure and extend into the female sleeve 243, and the male connector 231 is inserted into a groove matched with the female connector 241 and is communicated with the interface. The pipe end is connected to the male connector 231, which in turn communicates with the interface.

Specifically, the pipeline is divided into an inlet pipe 11 and an outlet pipe 13, flanges are arranged at an inlet and an outlet of the divided fluid, the inlet pipe 11 is connected with the inlet through the flanges, and the outlet pipe 13 is connected with the outlet through the flanges. Taking the inlet of the flow splitting body as an example, one end of the inlet pipe 11 is connected to the male connector 231, and then is communicated with the interface. The outer side of the inlet pipe 11 is sleeved with a male sleeve 233 and a female sleeve 243 in sequence.

When the temperature changes, the material can take place expansion or shrink, if each part of structure inflation and shrink degree are different, perhaps the expansion and the shrink of structure are restricted, will produce thermal stress, and thermal stress is too big, surpasss the allowable stress of material, can influence flowmeter measuring accuracy, in order to solve this problem the utility model discloses in be provided with expansion joint 3 for compensate thermal stress, eliminate thermal stress.

The stress compensation device is an expansion joint 3, as shown in fig. 3, expansion joints are arranged on the female flanges at two ends of the split fluid, the expansion joint 3 is arranged between the female joint and the female sleeve, and the stress compensation device comprises: an attachment ring 31, a resilient member 32 and a shield 33. Connect the ring to have two, one sets up the tip at female joint, one sets up the tip at female sleeve, elastic component 32 is the spring, and it sets up between two connect rings 31, both ends respectively with connect ring 31 fixed connection, connect the cross-section of ring 31 to be the L type, be provided with the guard shield 33 that plays supporting role at the top that connects ring 31, guard shield 33 one end and female sleeve on connect ring 31 fixed connection, the other end and female joint on connect ring 31 clearance fit.

After the low-temperature liquid enters, all parts contract, the elastic piece 32 deforms along the axial direction of the female sleeve in a telescopic mode, axial length compensation is carried out on the female sleeve, thermal stress is eliminated, and meanwhile the expansion joint 3 is arranged at the joint of the female sleeve and the female joint to prevent stress concentration.

In the present invention, in addition to the expansion joint 3 described in this embodiment, the stress compensation device may also be a bent pipe type expansion joint or a sleeve type expansion joint.

When the Coriolis force measuring device is used, low-temperature liquid enters the main body 121 through the inlet pipe 11, the male connector and the female connector in sequence, then passes through the smoothly-transitional flow dividing cavity 128, the low-temperature liquid is divided into two paths to enter the double-row measuring pipe 123 and is vibrated to generate Coriolis force, and the flow dividing cavity 128 is arranged into an arc-shaped structure, so that the low-temperature liquid can be divided more uniformly. The detected cryogenic liquid flows from the double-row measurement pipe 123 again through the diversion chamber 128, joins the outlet pipe 13, completes diversion and joining, and finally flows out of the outlet pipe 13.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. The first feature being "under," "below," and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or merely indicates that the first feature is at a lower level than the second feature.

The above are only preferred embodiments of the present invention, and it should be noted that the above preferred embodiments should not be considered as limitations of the present invention, and the scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and enhancements can be made without departing from the spirit and scope of the invention, and such modifications and enhancements are intended to be within the scope of the invention.

Claims (7)

1. The Coriolis mass flowmeter for the low-temperature liquid is characterized by comprising a flow dividing body, a pipeline, a flange and an expansion joint, wherein the expansion joint is arranged on the flange, the flange is connected with an interface of the flow dividing body, and the pipeline is sleeved in the flange and is connected with the interface of the flow dividing body through the flange.

2. The cryogenic liquid coriolis mass flowmeter of claim 1, characterized in that said flanges comprise a male flange and a female flange, said female flange comprising: the female joint is connected to the interface; the female flange plate is sleeved outside the pipeline; two ends of the female sleeve are respectively fixedly connected with the female joint and the female flange plate and sleeved outside the pipeline; the male flange includes: the male connector is inserted on the female connector; the male flange plate is connected to one side of the female flange plate; and the two ends of the male sleeve are fixedly connected with a male connector and a male flange plate and are sleeved between the female sleeve and the pipeline.

3. The cryogenic liquid coriolis mass flowmeter of claim 2, wherein said expansion joint is disposed between a female sleeve and a female connection, said expansion joint comprising: the connecting ring is sleeved on the female sleeve and the female joint respectively; and the elastic piece is arranged between the two connecting rings.

4. The coriolis mass flowmeter of claim 3 further comprising a shield surrounding said adapter ring, one end of said shield being fixedly connected to said adapter ring on one side and the other end of said shield being in clearance fit with said adapter ring on the other side.

5. The coriolis mass flowmeter of claim 4, wherein said interface ring has an L-shaped cross-section.

6. The cryogenic liquid coriolis mass flowmeter of claim 5 wherein said conduit is divided into an inlet tube and an outlet tube, said flow divider comprising: a main body; the interface is arranged on the main body and is divided into an inlet connected with the inlet pipe and an outlet connected with the outlet pipe; the double-row measuring tube is provided with a driving coil and a detection coil, and two ends of the double-row measuring tube are connected with the main body and are connected with the inlet tube and the outlet tube through the main body to form a passage.

7. The coriolis mass flowmeter of claim 6 wherein said double row of measurement tubes are further defined by mounting blocks.

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