CN116380184A - Microbending tubular mass flowmeter - Google Patents

Abstract

The invention discloses a microbending tube-in-tube type mass flowmeter, which relates to the field of fluid mass measurement and comprises a shell and a tube-in-tube mechanism, wherein the tube-in-tube mechanism comprises a plurality of capillary bends, two connecting components are arranged on the outer side walls of the capillary bends, and each connecting component comprises two tube clamps. According to the invention, the rotating rods are clamped by the tweezers to rotate, so that the two ends of the rotating rods drive the rubber columns to move, the moved rubber columns are fixed at the limit positions of the new positioning circular grooves, when the distance between the capillary elbows needs to be increased, the rotating rods rotate towards the axial direction, the rotating rods drive the two circular arc rails to be far away, the circular arc rails drive the capillary elbows to be far away from each other, the whole transverse or longitudinal capillary elbows are separated from the whole tube arranging mechanism, one opening of the guide elbow is pulled out, the number of the capillary elbows is reduced, the effect of adjusting the distance between the capillary elbows is realized, the problem that the capillary elbows vibrate to interfere each other due to overlarge flow is avoided, and the measurement accuracy at high flow is improved.

Description

A kind of micro-curved shell and tube mass flowmeter

technical field

The invention relates to the technical field of fluid quality measurement, in particular to a microbent tube-type mass flowmeter.

Background technique

The Coriolis mass flowmeter, referred to as the Coriolis force flowmeter for short, is a device that uses the Coriolis force principle that is proportional to the mass flow when the fluid flows in the vibrating pipeline to directly measure the mass flow. The principle of force is that in order to resist this forced vibration, the fluid will give the pipe a reaction force perpendicular to its flow direction. Under the action of this force called Coriolis effect, the vibration of the pipe is out of sync. There will be differences in the time of vibration of the outlet pipe, and if the time difference can be detected, the mass flow rate can be determined.

In the prior art, for example, the Chinese Patent No.: CN107290015A "micro-curved tubular mass flowmeter", comprising: a casing; two diversion sleeves, respectively connected to the two ends of the casing; multiple arcuate diversion tubes , set in the shell, the two ends of the flow tube are respectively connected to the flow guide sleeve; a pair of bow-shaped flow tubes are set in the shell, the two ends of the flow tube are respectively connected to the flow guide sleeve, the length of the flow tube is the same as that of the flow guide tube The lengths are equal; one driving element is fixed on the two flow tubes, the driving element drives a pair of flow tubes to generate vibration and is located in the center of the flow tube; and two detection elements, each detection element is respectively fixed on the two flow tubes to detect vibration and is respectively located in the drive both sides of the element.

However, in the existing technology, the U-shaped tubes in the prior art are arranged in a row of tubes, so that the vibration detection value originally in one U-shaped tube is converted into the vibration detection value of multiple tubes, and the idea of breaking it into parts , to improve the accuracy of measurement, however, in actual measurement, the quality and flow of the fluid are not stable, when the fluid flow is too large, the amplitude of its vibration increases, and the vibration between the various pipes in the tube will cause interference, affect the accuracy of the measurement results.

Contents of the invention

The purpose of the present invention is to provide a micro-bend tube mass flowmeter to solve the above-mentioned background technology. In the actual measurement, the mass and flow rate of the fluid are not stable. When the fluid flow rate is too large, the amplitude of its vibration increases. Large, the vibration between the various pipes in the tube array will cause interference and affect the accuracy of the measurement results.

In order to achieve the above object, the present invention provides the following technical solution: a micro-bent tube-type mass flowmeter, including a housing and a tube mechanism, the tube mechanism includes a plurality of capillary bends, the outer wall of the capillary bend There are two connection assemblies, the connection assembly includes two pipe clips, the outer wall of the pipe clip is fixedly connected with a circular arc rail, the inner wall of the circular arc rail is slidingly connected with a rubber column, and the two pipe clips A rotating rod is fixedly connected between the rubber columns, and the two connecting components are connected through a rotating connection, and the two inner walls of the circular arc rail are provided with a plurality of positioning circular grooves;

The corners of both ends of the pipe clamp are fixedly connected to the limit tubes, and there are guide posts slidingly connected between the two limit tubes, and the two connecting components are slidably connected between the guide posts. Fixing screws are threadedly connected between the pipe clips, the capillary elbow is movably connected by two pipe clips, and openings are opened at both ends of the circular arc rail.

Preferably, a protection mechanism is provided on the outer side wall of the connection assembly, and the protection mechanism includes a first fixing frame and a second fixing frame, and a protective sponge is arranged at the inner center of the first fixing frame.

Preferably, the protective sponge overlaps the outer wall of the capillary bend, the outer wall of the first fixing frame is provided with a flat groove, and the bottom wall of the flat groove is provided with an extrusion groove.

Preferably, an elastic piece is fixedly connected to the inner bottom wall of the extrusion groove, an elastic block is fixedly connected to the top of the elastic piece, and a baffle is arranged above the elastic block.

Preferably, the baffle is fixedly connected to the inner side wall of the flat groove, the bottom end of the baffle is slidably connected to a limiting plate, and the limiting plate is fixedly connected to the outer side wall of the second fixed frame .

Preferably, the outer side of the tube arrangement is sleeved with a guide elbow, both ends of the guide elbow are fixedly connected with flanges, and the outer wall of the flange begins with a plurality of installation holes.

Preferably, the middle position of the guide elbow is recessed downward to form an inverted tapered structure, and the middle position of the outer wall of the guide bend is fixedly connected with a vibration pickup sensor assembly.

Preferably, both ends of the vibration pickup sensor assembly are provided with a vibration sensor assembly, the vibration sensor assembly is fixedly connected to the outer side wall of the guide bend, and the vibration pickup sensor assembly A signal conversion assembly is arranged above the top of the assembly.

Preferably, the inner side wall of the housing is fixedly connected to the outer side wall of the guide elbow, the outer side wall of the signal conversion assembly is fixedly connected to the inner side wall of the housing, and the top end of the signal conversion assembly is arranged There is a detection dial.

Preferably, the bottom end of the detection dial is fixedly connected to the side wall of the housing, and the outer side wall of the first fixing frame is fixedly connected to the inner side wall of the guide elbow.

Compared with prior art, the beneficial effect of the present invention is:

1. In the present invention, the rotating rod is clamped and rotated by tweezers, so that both ends of the rotating rod drive the rubber column to move, and the moved rubber column is fixed at the limit of the new positioning circular groove, and the distance between the capillary bend needs to be increased When the turning rod rotates to the axial direction, the rotating rod drives the two arc rails away, and the arc rails drive the capillary bends away from each other, the entire horizontal or vertical capillary bends are separated from the overall tube arrangement, and the guide bend One of the openings is drawn out, reducing the number of capillary bends, realizing the effect of adjusting the distance between capillary bends, avoiding the problem of mutual interference of capillary bend vibration caused by excessive flow, and improving the measurement accuracy at high flow rates.

2. In the present invention, when it is necessary to increase the number of capillary bends, the rotating rod is rotated in a direction deviated from the axis, and the rotating rod drives the two arc rails to approach each other, and the arc rails drive the capillary bends to approach each other, so that the tube arrangement mechanism Reserve a space at the edge, connect the rubber column with the arc rail at the edge, and connect and fix each limit cylinder with the limit cylinder at the edge through the guide column to increase the number of capillary bends to improve The accuracy of the measurement realizes the effect of accurate measurement in the case of low flow.

3. In the present invention, the protective sponge is put on the outer side of the connection assembly, the limiting plate is aligned with the flat groove, and then the limiting plate is pushed upwards so that the limiting plate and the baffle plate are mutually limited to avoid the limit The plate is detached from the baffle, and at the same time, the elastic force of the shrapnel pushes the spring pressing block upwards, and the spring pressing block squeezes the limit plate and the baffle, realizing the effect of fastening and fixing the first fixed frame and the second fixed frame, and the connection The outside of the assembly is protected to extend the life of the mass flow meter.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of a micro-bend tube mass flowmeter of the present invention;

Fig. 2 is a structural schematic diagram of a shell of a micro-bend tube-type mass flowmeter according to the present invention;

Fig. 3 is a structural schematic diagram of a guide elbow of a micro-bent tube-type mass flowmeter according to the present invention;

Fig. 4 is a structural schematic diagram of a tube mechanism of a microbent tube mass flowmeter according to the present invention;

Fig. 5 is a structural schematic diagram of a protection mechanism of a microbent tube-type mass flowmeter according to the present invention;

Fig. 6 is an enlarged rendering of the local structure at A in Fig. 4;

Fig. 7 is a structural schematic diagram of a broken rod connection assembly of a micro-bend tube-type mass flowmeter according to the present invention;

Fig. 8 is an enlarged effect diagram of the local structure at B in Fig. 7 .

In the figure: 1. shell; 2. guide elbow; 3. flange; 31. installation hole; 4. detection dial; 5. tube mechanism; 51. capillary bend; 52. connecting component; 522, arc rail; 523, limit cylinder; 524, fixing screw; 525, positioning circular groove; 526, rubber column; 53, rotating rod; 54, guide column; Vibration sensor assembly; 8. Signal conversion assembly; 9. Protection mechanism; 91. First fixed frame; 92. Second fixed frame; 93. Protective sponge; 94. Baffle plate; 95. Extrusion groove; 96. Shrapnel; 97, limit plate; 98, elastic pressing block; 99, flat groove.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment one

Referring to Figures 1-8, a micro-bend tube-type mass flowmeter includes a housing 1 and a tube mechanism 5. The tube mechanism 5 includes a plurality of capillary bends 51, and the outer wall of the capillary bend 51 is provided with two A connection assembly 52, the connection assembly 52 includes two pipe clamps 521, the outer wall of the pipe clamp 521 is fixedly connected with an arc rail 522, and the inner wall of the arc rail 522 is slidingly connected with a rubber column 526, between the two rubber columns 526 A rotating rod 53 is fixedly connected between the two connecting components 52, and the two connecting components 52 are rotatably connected through the connecting component 52. The two inner side walls of the arc rail 522 are provided with a plurality of positioning circular grooves 525;

The corners of both ends of the pipe clip 521 are fixedly connected to the limit cylinder 523, and the guide column 54 is slidably connected between the two limit cylinders 523. 521 are threadedly connected with fixing screws 524, and the capillary elbow 51 is movably connected by two pipe clips 521, and both ends of the circular arc rail 522 are provided with openings.

In this embodiment, the capillary bend 51 is a plurality of rows of tubes arranged in a certain geometric shape, and the bend track of the capillary bend 51 is the same as that of the guide bend 2, and the capillary bend located in the middle of the guide bend 2 The number of tubes 51 can be adjusted at any time. When it is necessary to reduce the number of capillary bends 51, the horizontal and vertical connecting components 52 at the edge are removed, and the space between the spacer cylinder 523 and the guide column 54 is separated from the spacer, and the The rubber column 526 is taken off from the openings at both ends of the circular arc rail 522, so that the entire horizontal or vertical capillary bend 51 is separated from the overall tube arrangement 5, and is extracted from an opening of the guide bend 2. Otherwise, it is necessary to When increasing the number of capillary bends 51, first connect the rubber column 526 with the arc rail 522 at the edge, and connect and fix each limit cylinder 523 with the limit cylinder 523 at the edge through the guide column 54, Realize the effect of adjusting the number of capillary bends 51 inside the guide bend 2;

The outer sides of each capillary bend 51 are fixedly connected with two sets of tube clamps 521, one set of tube clamps 521 includes two half-surrounded tube clamps 521, two groups of tube clamps 521 respectively connect a capillary bend 51 with two horizontally and vertically. The capillary bend 51 of two directions is connected, in other words, a capillary bend 51 is subjected to the connection effect of horizontal and vertical two rotating rods 53 at the same time, that is to say, when the transverse distance of whole capillary bend 51 becomes larger, capillary The position of the rubber column 526 inside a group of circular arc rails 522 on the elbow 51 slides, so that the included angle between the rotating rod 53 and the axes of the two connected capillary elbows 51 is reduced. Then it is necessary to adjust the rotating rods 53 on the two groups of connecting assemblies 52 at the same time;

According to the preliminary observation, judge the flow rate entering the water inlet of the guide elbow 2. When the user thinks that the flow rate is too large, which may interfere with the vibration between the capillary bends 51, increase the distance between the capillary bends 51. , the rotating rod 53 is clamped by tweezers to rotate in the direction of the axis, so that the two ends of the rotating rod 53 drive the rubber column 526 to displace the circular arc rail 522 outward, and the moved rubber column 526 is in the limit position of the new positioning circular groove 525 Fix it, and adjust it with tools such as tweezers later on. Conversely, if the flow rate is considered to be too small and the number of capillary bends 51 needs to be increased to improve measurement accuracy, just turn the rotating rod 53 in a direction deviated from the axial direction.

Embodiment two

As shown in Figures 4-6, the outer wall of the connection assembly 52 is provided with a protective mechanism 9, the protective mechanism 9 includes a first fixed frame 91 and a second fixed frame 92, and a protective sponge 93 is provided at the inner center of the first fixed frame 91 . The protective sponge 93 is overlapped with the outer wall of the capillary bend 51 , the outer wall of the first fixing frame 91 is provided with a flat groove 99 , and the bottom wall of the flat groove 99 is provided with an extrusion groove 95 .

The inner bottom wall of the extrusion groove 95 is fixedly connected with an elastic piece 96 , the top of the elastic piece 96 is fixedly connected with an elastic block 98 , and a baffle 94 is arranged above the elastic block 98 . The baffle plate 94 is fixedly connected to the inner sidewall of the flat groove 99 , the bottom end of the baffle plate 94 is slidably connected to the limiting plate 97 , and the limiting plate 97 is fixedly connected to the outer sidewall of the second fixed frame 92 .

In this embodiment, after determining the number of rear capillary bends 51, the outer side of the connection assembly 52 is protected by a protective sponge 93, and at the same time, the two ends of the protective sponge 93 are fastened to the first fixing frame 91 and the second fixing frame 91 respectively. Fix the frame 92 so that the protective sponge 93 and the capillary bend 51 no longer slide sideways, avoiding the problem that the protective sponge 93 is separated from the connection assembly 52 again;

When fastening the second fixed frame 92 on the first fixed frame 91, the limit plate 97 is aligned with the flat groove 99, and then the limit plate 97 is pushed upwards so that the limit plate 97 and the baffle plate 94 are mutually limited. position, to prevent the limiting plate 97 from detaching from the baffle plate 94, and at the same time, the elastic force of the shrapnel 96 pushes the spring pressing block 98 upwards, so that the elastic pressing block 98 squeezes the limiting plate 97 and the baffle plate 94, increasing the limit plate 97 The frictional force between the limiting plate 97 and the baffle 94 makes the fastening between the limiting plate 97 and the baffle 94 tighter, so as to achieve the effect of fixing the second fixing frame 92 and the first fixing frame 91 .

Embodiment Three

As shown in Figures 1-5, the outer side of the tubular mechanism 5 is sleeved with a guide elbow 2, and both ends of the guide elbow 2 are fixedly connected with a flange 3, and the outer wall of the flange 3 begins to have a plurality of installation holes 31 . The middle position of the guide elbow 2 is recessed downward to form an inverted tapered structure, and the middle position of the outer wall of the guide bend 2 is fixedly connected with a vibration pickup sensor assembly 6 . Both ends of the vibration pickup sensor assembly 6 are provided with an excitation sensor assembly 7, the vibration sensor assembly 7 is fixedly connected with the outer side wall of the guide elbow 2, and the top end of the vibration pickup sensor assembly 6 is arranged Signal conversion assembly 8 is arranged. The inner wall of the housing 1 is fixedly connected to the outer wall of the guide elbow 2, the outer wall of the signal conversion assembly 8 is fixedly connected to the inner wall of the housing 1, and a detection dial 4 is arranged above the top of the signal conversion assembly 8. The bottom end of the detection dial 4 is fixedly connected to the side wall of the housing 1 , and the outer side wall of the first fixing frame 91 is fixedly connected to the inner side wall of the guide elbow 2 .

In this embodiment, flanges 3 are provided at both ends of the guide elbow 2, and a plurality of mounting holes 31 are opened on the surface of the flange 3, so that the flange 3 is sealed with the water inlet pipe and the water outlet pipe, and the guide elbow 2 is sealed. The middle end is connected with the vibration pickup sensor assembly 6, and the vibration sensor assembly 7 is also arranged at both ends of the vibration pickup sensor assembly 6. The sense assembly 7 collects the vibration data of the internal capillary bend 51, and summarizes it to the signal conversion assembly 8, and calculates the structure to obtain the fluid quality, and reflects the result by detecting the pointer reading on the surface of the dial 4.

The use method and working principle of this device: After preliminary observation, judge the flow rate entering the water inlet of the guide elbow 2. When the user thinks that the flow rate is too large, which may interfere with the vibration between the capillary bends 51, use tweezers Clamp the rotating rod 53 to rotate in the direction of the axis, so that the two ends of the rotating rod 53 drive the rubber column 526 to displace the circular arc rail 522 outward, and the moved rubber column 526 is fixed under the limit position of the new positioning circular groove 525;

At the same time, remove the horizontal and vertical connecting components 52 at the edge, disengage the position between the limit cylinder 523 and the guide column 54, and remove the rubber column 526 from the openings at both ends of the arc rail 522 , so that the entire horizontal or vertical capillary bend 51 is separated from the overall tube arrangement 5, and drawn out from an opening of the guide bend 2;

When the transverse distance of the whole capillary bend 51 becomes larger, the position of the rubber column 526 inside a set of circular arc rails 522 on the capillary bend 51 slides, so that the clamping between the rotating rod 53 and the axes of the two connected capillary bends 51 When the angle is reduced, the distance between the capillary bends 51 is increased. After the distance between the capillary bends 51 is increased, the effect of mutual interference is weakened, which improves the measurement accuracy;

When the user thinks that the flow rate is too small and needs to increase the number of capillary bends 51 to improve the measurement accuracy, the rotating rod 53 is rotated in a direction deviated from the axial direction to reduce the occupied space of a certain number of capillary bends 51, so that the tube arrangement mechanism 5. It is convenient to reserve more space;

Then, the rubber column 526 is socketed between the circular arc rail 522 at the edge, and each limit cylinder 523 is connected and fixed with the limit cylinder 523 at the edge through the guide column 54, so that the inside of the guide elbow 2 is arranged more Capillary bends 51 are mostly used for measurement. Under the condition that the capillary bends 51 do not vibrate and interfere with each other, the more capillary bends 51, the more accurate the measurement results of the flowmeter;

When measuring the fluid quality, the vibration energy on both sides is different, and the vibration data of the internal capillary bend 51 is collected through the excitation sensor assembly 7, and summarized to the signal conversion assembly 8, and the fluid quality is obtained after the structure is calculated. The result is reflected by detecting the pointer reading on the surface of the dial 4 .

Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or perform equivalent replacements for some of the technical features. Within the spirit and principles of the present invention, any modifications, equivalent replacements, improvements, etc., shall be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a microbending shell and tube mass flowmeter, includes shell (1) and shell and tube mechanism (5), its characterized in that: the tube arranging mechanism (5) comprises a plurality of capillary bent tubes (51), two connecting components (52) are arranged on the outer side walls of the capillary bent tubes (51), each connecting component (52) comprises two tube clamps (521), an arc rail (522) is fixedly connected to the outer side walls of the tube clamps (521), rubber columns (526) are slidably connected to the inner side walls of the arc rails (522), a rotating rod (53) is fixedly connected between the two rubber columns (526), the two connecting components (52) are rotationally connected through the connecting components (52), and a plurality of positioning circular grooves (525) are formed in the two inner side walls of the arc rails (522);

both ends corner of pipe strap (521) all fixedly connected with spacing section of thick bamboo (523), two sliding connection has guide post (54) between spacing section of thick bamboo (523), two coupling assembling (52) are through sliding connection between guide post (54), two threaded connection has set screw (524) between pipe strap (521), capillary return bend (51) are through two pipe strap (521) swing joint, the opening has all been seted up at the both ends of circular arc rail (522).

2. A microbend tubular mass flowmeter according to claim 1, wherein: the outer side wall of the connecting assembly (52) is provided with a protection mechanism (9), the protection mechanism (9) comprises a first fixing frame (91) and a second fixing frame (92), and a protection sponge (93) is arranged at the inner center position of the first fixing frame (91).

3. A microbend tubular mass flowmeter according to claim 2, wherein: the protection sponge (93) with capillary return bend (51) lateral wall overlap joint, flat groove (99) have been seted up to the lateral wall of first fixed frame (91), extrusion groove (95) have been seted up to the diapire of flat groove (99).

4. A microbend tubular mass flowmeter according to claim 3, characterized in that: the inner bottom wall of extrusion groove (95) fixedly connected with shell fragment (96), shell fragment (96) top fixedly connected with bullet briquetting (98), the top of bullet briquetting (98) is provided with baffle (94).

5. A microbend tubular mass flowmeter according to claim 4, wherein: the baffle (94) with the inside wall fixed connection of flat groove (99), the bottom sliding connection of baffle (94) has limiting plate (97), limiting plate (97) with fixed connection between the lateral wall of second fixed frame (92).

6. A microbend tubular mass flowmeter according to claim 5, wherein: the outside of shell and tube mechanism (5) has cup jointed guide return bend (2), the both ends of guide return bend (2) are all fixedly connected with flange (3), the lateral wall of flange (3) begins to have a plurality of mounting holes (31).

7. A microbend tubular mass flowmeter according to claim 6, wherein: the middle position of the guide elbow pipe (2) is sunken downwards to form an inverted cone structure, and the middle position of the outer side wall of the guide elbow pipe (2) is fixedly connected with a vibration pickup sensing assembly (6).

8. A microbend tubular mass flowmeter according to claim 7, wherein: vibration excitation sensing assemblies (7) are arranged at two ends of the vibration pickup sensing assembly (6), the vibration excitation sensing assemblies (7) are fixedly connected with the outer side wall of the guide bent pipe (2), and a signal conversion assembly (8) is arranged above the top end of the vibration pickup sensing assembly (6).

9. A microbend tubular mass flowmeter according to claim 8, wherein: the device is characterized in that the inner side wall of the shell (1) is fixedly connected with the outer side wall of the guide bent pipe (2), the outer side wall of the signal conversion assembly (8) is fixedly connected with the inner side wall of the shell (1), and a detection dial plate (4) is arranged above the top end of the signal conversion assembly (8).

10. A microbend tubular mass flowmeter according to claim 9, wherein: the bottom of the detection dial plate (4) is fixedly connected with the side wall of the shell (1), and the outer side wall of the first fixing frame (91) is fixedly connected with the inner side wall of the guide elbow pipe (2).

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