CN210375260U

CN210375260U - Bent tube type Coriolis mass flowmeter

Info

Publication number: CN210375260U
Application number: CN201921513607.4U
Authority: CN
Inventors: 何晓莉; 张俊; 刘超; 罗正江; 周李; 田隆
Original assignee: Chengdu Hetai Intelligent Technology Co ltd
Current assignee: Chengdu luodingsen Intelligent Technology Co.,Ltd.
Priority date: 2019-09-11
Filing date: 2019-09-11
Publication date: 2020-04-21
Anticipated expiration: 2029-09-11

Abstract

The utility model provides a bent tube type Coriolis mass flowmeter, which comprises a transmitter and a sensor which are connected with each other through a connecting rod, wherein the sensor comprises a main body, a measuring tube assembly and a housing; the appearance of the main body is of an integrally formed square structure, two arc-shaped flow channels are symmetrically arranged in the main body in a bilateral mode, the pipe seats are symmetrically arranged at the tops of the two arc-shaped flow channels in the main body in a bilateral mode, the top surfaces of the pipe seats are provided with small holes connected with the measuring pipe assembly, the small holes are communicated with the arc-shaped flow channels to form horizontal flow channels which are symmetrically arranged in the bilateral mode and opposite in direction, and outlets of. Compared with the prior art, the utility model discloses a main part adopts integrated into one piece's square structure, and the preparation is easy, can obviously reduce manufacturing cost, and the smooth and smooth transition of runner has smoothly just the flow resistance little simultaneously, has improved the symmetry and the stability of runner to mass flow meter's measurement accuracy has been guaranteed.

Description

Bent tube type Coriolis mass flowmeter

Technical Field

The utility model relates to a measuring equipment technical field, concretely relates to bent cast coriolis mass flowmeter.

Background

The Coriolis mass flowmeter is characterized in that a measuring pipe through which a medium flows vibrates according to the Coriolis principle, a sensor detects and analyzes the frequency, phase difference and amplitude change of the measuring pipe, the mass of the medium flowing through the measuring pipe at present is directly measured, and the density is calculated according to the vibration frequency; multiple process variables of the pipeline can be measured simultaneously, such as: mass flow, volume flow, density, temperature. Because of its good reliability, long service life, the characteristics that can also measure high viscosity fluid and high-pressure gas, so in process flow and trade flow settlement measurement, coriolis mass flowmeter uses more and more.

The coriolis mass flowmeter is comprised of a sensor, through which a medium flows directly through a measurement tube within the sensor to effect detection, and a transducer, which is a high performance microprocessor based electronic component, that provides power to the sensor and outputs a signal. The sensor is connected with the transmitter to form a complete mass flow measurement system, and the connection mode of the sensor is divided into an integrated type and a split type. The flow channel in the sensor is a key factor for determining the performance of the mass flowmeter, and the reasonability and smoothness of the flow channel layout directly influence the accuracy and stability of measurement.

The Coriolis mass flowmeter is divided into a single-tube type and a double-tube type according to the different quantity of the measuring tubes; the measuring tube can be divided into a straight tube type and a bent tube type according to different shapes of the measuring tube.

In the prior art, most of the prior art adopts a bent pipe type, the bent pipe type is divided into a U type, a slightly bent type, an △ type, an omega type and the like, wherein the U type, the slightly bent type and the △ type are most widely applied, the traditional slightly bent type has large main body size, so that the flow channel layout is unreasonable, the metering accuracy is low, the manufacturing and processing are complex, the cost is higher, and correspondingly, the size and the occupied space of the measuring pipe are large, and the measuring pipe cannot be installed and used in narrow occasions.

Therefore, there is a need to design a coriolis mass flowmeter that has a small volume, a low manufacturing cost, and a high metering accuracy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the not enough of prior art, the utility model aims at providing a bent tube type coriolis mass flowmeter to the main part size who slightly bends among the solution prior art is big, leads to the runner overall arrangement unreasonable, the measurement degree of accuracy is low, and the preparation processing is complicated, and the cost is on the high side, and correspondingly it surveys buret size and occupation space also big, can't be at the problem of constrictive occasion installation and use.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a bent tube type Coriolis mass flowmeter, including transmitter and sensor through connecting rod interconnect, the sensor includes main part, surveys buret assembly and housing, survey buret assembly with the main part is connected, the housing covers survey buret assembly after with the main part is connected; the main part outward appearance is integrated into one piece's square structure, locates two arc runners and bilateral symmetry at its top including bilateral symmetry and locates its tube socket, the tube socket top surface is seted up and is connected survey buret assembly's aperture, the aperture with arc runner intercommunication forms bilateral symmetry and opposite direction's horizontal runner, horizontal runner export and flange weld.

Further, survey buret assembly including surveying buret, driver, detector and damping piece, survey buret both ends respectively with the aperture is connected, the driver is located survey buret the central axis department, the detector symmetry is located survey buret inboard, damping piece symmetry is located survey buret is last.

Furthermore, two small holes are arranged on the top surface of the tube seat in a symmetrical mode, and the two small holes are evenly and smoothly transited into the arc-shaped flow channel; correspondingly, the measuring tubes are also arranged in two parallel.

Furthermore, the top surface of the tube seat is obliquely arranged with a high inside and a low outside, and the two small holes are arranged in the oblique direction of the top surface of the tube seat.

Further, the measuring pipe comprises a bending section and straight pipe sections which are symmetrically arranged and connected to two ends of the bending section.

Further, the bending section is a major arc circular tube.

Furthermore, the whole housing is of a cylindrical structure and is divided into an upper housing section, a main housing body and a lower housing section which are mutually welded up and down, and the lower housing section is welded with the main body through a middle groove.

Further, the middle upper part of the housing main body is provided with a convex arc surface.

Furthermore, a spherical upper cover is arranged on the upper section of the housing.

Compared with the prior art, the utility model provides a bent cast coriolis mass flowmeter has following beneficial effect:

1. the main body adopts an integrally formed square structure, the manufacturing is easy, the manufacturing cost can be obviously reduced, meanwhile, the flow channel is in smooth transition, smooth and small in flow resistance, and the symmetry and the stability of the flow channel are improved, so that the metering accuracy of the mass flowmeter is ensured;

2. the measuring tube is designed in a bent tube type, the bending angle of the measuring tube is larger than 180 degrees, a U-shaped structure is formed, the difficulty of bending the tube can be reduced, the yield of batch production is improved, the consistency after bending the tube is ensured, meanwhile, the measuring tube is convenient to assemble with a small hole of a main body, the occupied size is small, and the measuring tube can be installed and used in narrow occasions; in addition, the measuring tube of the structure has easy oscillation starting, stable resonance of the mass flowmeter and higher metering accuracy;

3. the cover shell is of a cylindrical structure, three parts of the cover shell are welded together, the manufacture is easy, the cost is lower, the whole structure is compact and concise, the installation space requirement is small, and the appearance is attractive and elegant.

Drawings

Fig. 1 is a schematic view of the structure of the present invention;

fig. 2 is a left side view structure diagram of the present invention;

fig. 3 is a schematic bottom view of the present invention;

FIG. 4 is a schematic diagram of the interior of the sensor in a front view;

FIG. 5 is a schematic left side view of the interior of the sensor;

FIG. 6 is a perspective view of the main body;

FIG. 7 is a schematic view of a half-section of the main body;

FIG. 8 is a schematic view of the structure of FIG. 5 along line A-A;

fig. 9 is a schematic perspective view of a measurement pipe.

The reference numerals are explained below:

1: a connecting rod 2: main body

21: arc-shaped flow passage 22: tube holder

221: small hole 23: horizontal flow passage

3: measurement pipe assembly 31: measuring tube

311: the curved section 312: straight pipe section

32: the driver 33: detector

34: damping block 4: housing shell

41: housing upper section 42: housing body

43: the lower section 5 of the housing: and (4) a flange.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence between the upper, lower, left and right directions of the drawings themselves, and do not limit the structure.

As shown in fig. 1 to 9, the present invention provides a bent tube type coriolis mass flowmeter, which comprises a transmitter (not shown in the figure) and a sensor connected to each other through a connecting rod 1, wherein the sensor comprises a main body 2, a measuring tube assembly 3 and a housing 4, the measuring tube assembly 3 is connected to the main body 2, and the housing 4 is connected to the main body 2 after covering the measuring tube assembly 3; the appearance of the main body 2 is of an integrally formed square structure, the main body comprises two arc-shaped flow passages 21 which are arranged in the main body in a bilateral symmetry mode and a pipe seat 22 which is arranged at the top of the main body in a bilateral symmetry mode, the pipe seat 22 is provided with a small hole 221 connected with the measuring pipe assembly 3, the small hole 221 is communicated with the arc-shaped flow passages 21 to form horizontal flow passages 23 which are in bilateral symmetry and opposite in direction, and outlets of the horizontal flow passages 23 are welded with flanges 5. In the present embodiment, the main body 2 is integrally formed by precision casting. Due to the structure of the main body, the flow channel structure is easy to manufacture, the manufacturing cost can be obviously reduced, the flow channel is in smooth transition, the flow resistance is small, the symmetry and the stability of the flow channel are improved, and the metering accuracy of the mass flow meter is ensured.

As shown in fig. 4 to 5, the measuring pipe assembly 3 includes a measuring pipe 31, a driver 32, a detector 33, and a vibration damping block 34, wherein both ends of the measuring pipe 31 are respectively connected to the small holes 221, the driver 32 is disposed at the central axis of the measuring pipe 31 for generating vibration, the detector 33 is symmetrically disposed inside the measuring pipe 31, and the vibration damping block 34 is symmetrically disposed on the measuring pipe 31.

As shown in fig. 6 to 8, the top surface of the tube seat 22 is inclined from the inside to the outside, two small holes 221 are symmetrically arranged in the inclined direction of the top surface of the tube seat 22, and the two small holes 221 are uniformly and smoothly transited into the arc-shaped flow passage 21; correspondingly, the measuring tubes 31 are also arranged in two and parallel to each other.

As shown in fig. 9, the measurement pipe 31 includes a curved section 311 and straight pipe sections 312 symmetrically disposed and connected to both ends of the curved section 311; in the present embodiment, the bending section 311 is a circular arc tube, i.e. the bending angle (i.e. the central angle) is greater than 180 °. The measuring tube is designed in a bent tube type, the bending angle of the measuring tube is larger than 180 degrees, a U-shaped structure is formed, the difficulty of bending the tube can be reduced, the yield of batch production is improved, the consistency after bending the tube is ensured, meanwhile, the measuring tube is convenient to assemble with a small hole of a main body, the occupied size is small, and the measuring tube can be installed and used in narrow occasions; in addition, the measuring pipe of the structure is easy to start oscillation, the resonance of the mass flow meter is stable, and the metering accuracy is high.

Specifically, the driver 32 includes a coil, a magnet and two brackets, the coil is mounted on one bracket by a screw, the magnet is mounted on the other bracket by a screw, the two brackets are respectively welded on the measuring tubes arranged in parallel by vacuum brazing, the coil and the magnet are coaxially matched for use, so that the driver is mounted on the central axis of the measuring tubes; the structure and action principle of the detector 33 are the same as those of the driver, and the detector is respectively arranged on the straight pipe section 312 of the measuring pipe 31 in an inverted symmetry manner and at a position close to the bent section 311; damper blocks 34 are symmetrically mounted on straight tube sections 312 of measurement duct 31 adjacent tube block 22. In operation, when no fluid flows through the measurement pipe 31, the measurement pipe 31 is not twisted, and the electromagnetic signals detected by the two side detectors 33 are in phase; when a fluid flows through the measuring pipe 31, the measuring pipe 31 is twisted, the electromagnetic signals detected by the two side detectors 33 generate a phase difference, and the magnitude of the fluid flow is calculated through the phase difference.

The cover 4 is a cylindrical structure and is divided into an upper cover section 41, a main cover body 42 and a lower cover section 43 which are welded with each other up and down, and the lower cover section 43 is welded with the main body 2 through a middle groove. The upper middle part of the housing main body 42 is provided with a convex arc surface to ensure that the gap between the sensor main body and the maximum size position of the measuring pipe is enough, and meanwhile, the appearance of the sensor is modeled to avoid the appearance of the sensor being a single cylinder, so that the appearance is more attractive. The upper casing section 41 is provided with a spherical upper cover, and is welded with the casing main body 42 to form a closed space for protecting the measuring tube so as to be isolated from the external space. The three parts of the housing 4 are all formed by processing and tailor-welding pipe materials, and the manufacturing is easy and the cost is lower.

The sensor and the transmitter are connected together through a connecting rod 1 (i.e. a split design as shown in fig. 1), and when the temperature of an application medium is too low or too high, the design is lengthened in order to reduce the transmission of low temperature or high temperature to the corresponding electronic device and influence the work of the electronic device.

The flange 5 is a process interface for face-to-face installation with application equipment, as shown in fig. 1, and different process interfaces can be configured according to actual field application differences. The measuring tube and the main body form the most main medium flow passage of the sensor, and by adopting the measures, the flange mounting size of the mass flow meter can be smaller, and the narrow field mounting space requirement is met; the flow channel is smooth, the flow resistance is small, and the metering accuracy of the mass flowmeter is ensured; the whole structure is compact, and the appearance is beautiful.

By the structure, the main body is in a square structure when viewed from the outside of the sensor, the manufacturing is easy, the cost is low, the cover shell is in a cylindrical structure, the whole structure is compact and concise, the installation space requirement is small, and the appearance is attractive and elegant; the measuring tube with the U-shaped structure has high yield in batch production, ensures good resonance stability of the mass flow meter, and ensures the metering accuracy of the mass flow meter.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. A bent tube type Coriolis mass flowmeter comprises a transmitter and a sensor which are connected with each other through a connecting rod (1), and is characterized in that the sensor comprises a main body (2), a measuring tube assembly (3) and a cover (4), the measuring tube assembly (3) is connected with the main body (2), and the cover (4) covers the measuring tube assembly (3) and then is connected with the main body (2); main part (2) outward appearance is integrated into one piece's square structure, locates tube socket (22) at its top including bilateral symmetry locate its inside two arc runners (21) and bilateral symmetry, connect has been seted up to tube socket (22) top surface survey aperture (221) of pipe assembly (3), aperture (221) with arc runner (21) intercommunication forms bilateral symmetry and opposite direction's horizontal runner (23), horizontal runner (23) export and flange (5) welding.

2. The bent tube type coriolis mass flowmeter of claim 1, wherein said measurement tube assembly (3) comprises a measurement tube (31), a driver (32), a detector (33) and a vibration damping block (34), said measurement tube (31) being connected to said small holes (221) at both ends thereof, said driver (32) being disposed at a central axis of said measurement tube (31), said detector (33) being symmetrically disposed inside said measurement tube (31), and said vibration damping block (34) being symmetrically disposed on said measurement tube (31).

3. The elbow type coriolis mass flowmeter of claim 2, wherein said two small holes (221) are arranged symmetrically to said top surface of said stem (22), and said two small holes (221) uniformly and smoothly transition into said curved flow channel (21); correspondingly, the measuring tubes (31) are also arranged in two parallel.

4. The elbow type coriolis mass flowmeter of claim 3, wherein said tube base (22) is inclined obliquely upward and downward from the top surface thereof, and said small holes (221) are provided in two symmetrically with respect to the inclination direction of said tube base (22) top surface.

5. The bent-tube coriolis mass flowmeter of claim 2 or 3 characterized in that said measurement tube (31) comprises a curved section (311) and straight tube sections (312) symmetrically disposed and connected to both ends of said curved section (311).

6. The bent-tube coriolis mass flowmeter of claim 5 characterized in that said curved section (311) is a circular major arc tube.

7. The elbow type coriolis mass flowmeter of claim 1, wherein said casing (4) has an overall cylindrical structure and is divided into three parts, an upper casing section (41), a main casing section (42), and a lower casing section (43), which are welded to each other, and said lower casing section (43) is welded to said main section (2) by a central groove.

8. The elbow type coriolis mass flowmeter of claim 7, wherein said casing main body (42) is provided with a convex circular arc surface at its middle upper portion.

9. The bent tube type coriolis mass flowmeter of claim 7, characterized in that said housing upper section (41) is provided with a spherical upper cover.