Microbend coiled tube mass flowmeter

Abstract

The application discloses a kind of micro-bend column pipe type mass flowmeter, it is related to fluid mass measurement field, including shell and column pipe mechanism, the column pipe mechanism includes multiple capillary bends, the outer side wall of the capillary bend is provided with two connecting components, the connecting component includes two pipe clamps.The present application is rotated by tweezers clamping rotating rod, and the rubber column at both ends of the rotating rod is moved.The position of the rubber column after moving is fixed under the limiting of new positioning circular groove.When the spacing of capillary bend needs to be increased, the rotating rod is rotated towards the axis direction, the rotating rod drives two circular arcs to move away, the circular arc drives the capillary bends to move away from each other, the entire transverse or longitudinal capillary bend is separated from the overall column pipe mechanism, and is extracted through an opening of the guide bend, reducing the number of capillary bends, achieving the effect of adjusting the spacing of capillary bends, avoiding the problem of mutual interference due to the vibration of capillary bends caused by excessive flow, and improving the measurement accuracy at high flow.

Description

Technical Field

[0001] This invention relates to the field of fluid mass measurement technology, specifically to a micro-bend tubular mass flow meter. Background Technology

[0002] A Coriolis mass flow meter, also known as a Coriolis force flow meter, is a device that directly measures mass flow rate by utilizing the Coriolis force generated when fluid flows in a vibrating pipe. The Coriolis force principle states that in order to resist this forced vibration, the fluid exerts a reaction force on the pipe perpendicular to its flow direction. Under the action of this force, known as the Coriolis effect, the vibration of the pipe becomes asynchronous, and there will be a difference in the timing of the vibration between the inlet section and the outlet section. By detecting the magnitude of this time difference, the magnitude of the mass flow rate can be determined.

[0003] In the prior art, such as the "micro-bend type tubular mass flow meter" with Chinese patent number CN107290015A, it includes: a housing; two flow guide sleeves, respectively connected to both ends of the housing; multiple bow-shaped flow guide tubes, disposed inside the housing, with both ends of the flow guide tubes connected to the flow guide sleeves; a pair of bow-shaped flow tubes, disposed inside the housing, with both ends of the flow tubes connected to the flow guide sleeves, the length of the flow tubes being equal to the length of the flow guide tubes; a driving element, fixed to the two flow tubes, the driving element driving the pair of flow tubes to vibrate and located in the center of the flow tubes; and two detection elements, each detection element being fixed to the two flow tubes to detect vibration and located on both sides of the driving element.

[0004] However, in existing technologies, the U-shaped tubes in the original technology are arranged in a tube-by-tube manner, which transforms the vibration detection quantity that was originally in one U-shaped tube into the vibration detection quantity of multiple tubes. By breaking down the whole into parts, the measurement accuracy is improved. However, in actual measurement, the mass and flow rate of the fluid are not stable. When the fluid flow rate is too large, its vibration amplitude increases, and the vibration between the various pipes in the tube-by-tube arrangement will cause interference, affecting the accuracy of the measurement results. Summary of the Invention

[0005] The purpose of this invention is to provide a micro-bend tubular mass flow meter to solve the problem mentioned in the background art that the mass and flow rate of the fluid are not stable in actual measurement. When the fluid flow rate is too large, the amplitude of its vibration increases, and the vibration between the various pipes in the tubular structure will cause interference, affecting the accuracy of the measurement results.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a micro-bend tubular mass flow meter, comprising a housing and a tubular mechanism, wherein the tubular mechanism comprises multiple capillary bends, and two connecting components for connecting adjacent capillary bends are provided on the outer side wall of the capillary bends. Each connecting component comprises two pipe clamps, and an arc rail is fixedly connected to the outer side wall of each pipe clamp. A rubber column is slidably connected to the inner side wall of each arc rail. One of the rubber columns is fixedly connected to each end of a rotating rod. Two connecting components on opposite connecting components located on two adjacent capillary bends are rotatably connected by a rotating rod. Multiple positioning grooves are provided on the two inner side walls of the arc rail.

[0007] Limiting cylinders are fixedly connected at both corner positions of the pipe clamps. A guide post is slidably connected between the two limiting cylinders. The two limiting cylinders located on adjacent capillary bends and positioned opposite each other are slidably connected by a guide post. A fixing screw is threaded between the two pipe clamps. The capillary bends are movably connected by the two pipe clamps. Both ends of the arc rail are provided with openings.

[0008] Preferably, the outer wall of the connecting component is provided with a protective mechanism, which includes a first fixing frame and a second fixing frame, and a protective sponge is provided at the inner center of the first fixing frame.

[0009] Preferably, the protective sponge overlaps with 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.

[0010] Preferably, a spring sheet is fixedly connected to the inner bottom wall of the extrusion groove, a spring pressure block is fixedly connected to the top of the spring sheet, and a baffle is provided above the spring pressure block.

[0011] Preferably, the baffle is fixedly connected to the inner wall of the flat groove, a limiting plate is slidably connected to the bottom end of the baffle, and the limiting plate is fixedly connected to the outer wall of the second fixed frame.

[0012] Preferably, a guide bend is sleeved on the outer side of the tube assembly, and flanges are fixedly connected to both ends of the guide bend. Multiple mounting holes are present on the outer side wall of the flanges.

[0013] Preferably, the middle position of the guide bend is recessed to form an inverted cone structure, and a vibration pickup sensor assembly is fixedly connected to the middle position of the outer side wall of the guide bend.

[0014] Preferably, both ends of the vibration pickup sensing assembly are provided with excitation sensing assemblies, the excitation sensing assemblies are fixedly connected to the outer wall of the guide bend, and a signal conversion assembly is provided above the top of the vibration pickup sensing assembly.

[0015] Preferably, the inner wall of the housing is fixedly connected to the outer wall of the guide bend, the outer wall of the signal conversion assembly is fixedly connected to the inner wall of the housing, and a detection dial is provided above the top of the signal conversion assembly.

[0016] 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 bend.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this invention, the rotating rod is held by tweezers and rotated, causing the rubber columns at both ends of the rotating rod to move. After moving, the rubber columns are fixed in position under the limit of the new positioning groove. When it is necessary to increase the spacing of the capillary bends, the rotating rod rotates in the axial direction. The rotating rod drives the two arc rails away from each other, and the arc rails drive the capillary bends away from each other. The entire horizontal or vertical capillary bend is disengaged from the overall tube structure and pulled out through one opening of the guide bend, reducing the number of capillary bends. This achieves the effect of adjusting the spacing of the capillary bends, avoiding the problem of mutual interference of capillary bend vibration due to excessive flow, and improving the measurement accuracy at high flow rates.

[0019] 2. In this invention, when it is necessary to increase the number of capillary bends, the rotating rod is rotated in a direction deviating from the axis. The rotating rod drives the two arc rails to move closer to each other, and the arc rails drive the capillary bends to move closer to each other, so that space is reserved at the edge of the tube structure. The rubber column is connected to the arc rail at the edge, and each limiting cylinder is connected and fixed to the limiting cylinder at the edge through the guide column. This increases the number of capillary bends to improve the measurement accuracy, and achieves the effect of accurate measurement under low flow conditions.

[0020] 3. In this invention, a protective sponge is fitted over the outside of the connecting component, the limiting plate is aligned with the flat groove, and then the limiting plate is pushed upward to limit the mutual positioning between the limiting plate and the baffle, preventing the limiting plate from detaching from the baffle. At the same time, the elastic force of the spring sheet pushes the spring block upward, and the spring block squeezes the limiting plate and the baffle, achieving the effect of fastening and fixing the first fixed frame and the second fixed frame, protecting the outside of the connecting component and extending the service life of the mass flow meter. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a micro-bend tubular mass flow meter according to the present invention;

[0022] Figure 2 This is a schematic diagram of the housing of a micro-bend tubular mass flow meter according to the present invention;

[0023] Figure 3This is a schematic diagram of the guide bend of a micro-bend tubular mass flow meter according to the present invention;

[0024] Figure 4 This is a schematic diagram of the tube mechanism of a micro-bend tube mass flow meter according to the present invention;

[0025] Figure 5 This is a schematic diagram of the protective mechanism for a micro-bend tubular mass flow meter according to the present invention;

[0026] Figure 6 for Figure 4 Enlarged view of the local structure at point A;

[0027] Figure 7 This is a schematic diagram of the structure of a connecting assembly for a micro-bend tubular mass flow meter according to the present invention;

[0028] Figure 8 for Figure 7 A magnified view of the local structure at point B in the middle.

[0029] In the diagram: 1. Outer shell; 2. Guide bend; 3. Flange; 31. Mounting hole; 4. Detection dial; 5. Tube assembly; 51. Capillary bend; 52. Connecting assembly; 521. Pipe clamp; 522. Arc rail; 523. Limiting cylinder; 524. Fixing screw; 525. Positioning groove; 526. Rubber column; 53. Rotating rod; 54. Guide column; 6. Vibration pickup sensor assembly; 7. Excitation sensor assembly; 8. Signal conversion assembly; 9. Protective mechanism; 91. First fixing frame; 92. Second fixing frame; 93. Protective sponge; 94. Baffle; 95. Extrusion groove; 96. Spring; 97. Limiting plate; 98. Spring block; 99. Flat groove. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0031] Reference Figure 1-8As shown: A micro-bend tubular mass flow meter includes a housing 1 and a tubular mechanism 5. The tubular mechanism 5 includes multiple capillary bends 51. The outer side wall of the capillary bends 51 is provided with two connecting components 52 for connecting adjacent capillary bends 51. The connecting component 52 includes two pipe clamps 521. The outer side wall of the pipe clamps 521 is fixedly connected to an arc rail 522. The inner side wall of the arc rail 522 is slidably connected to a rubber column 526. The two ends of the rotating rod 53 are respectively fixedly connected to a rubber column 526. The two connecting components 52 on the connecting components located on two adjacent capillary bends 51 and opposite to each other are rotatably connected by the rotating rod 53. The two inner side walls of the arc rail 522 are provided with multiple positioning grooves 525.

[0032] Limiting cylinders 523 are fixedly connected at both corner positions of pipe clamp 521. A guide post 54 is slidably connected between the two limiting cylinders 523. The two limiting cylinders 523 located on adjacent capillary bends 51 and positioned opposite each other are slidably connected by a guide post 54. A fixing screw 524 is threaded between the two pipe clamps 521. The capillary bends 51 are movably connected by the two pipe clamps 521. Both ends of the arc rail 522 are provided with openings.

[0033] In this embodiment, the capillary bends 51 are multiple tubes arranged in a certain geometric shape, and the bending trajectory of the capillary bends 51 is the same as that of the guide bends 2. The number of capillary bends 51 located in the middle of the guide bends 2 can be adjusted at any time. When it is necessary to reduce the number of capillary bends 51, the transverse and longitudinal connecting components 52 at the edge are removed, so that the limiting cylinder 523 is disengaged from the guide post 54, and the rubber post 526 is removed from the two ends of the arc rail 522, so that the entire transverse or longitudinal capillary bends 51 are disengaged from the overall tube structure 5, and pulled out from one opening of the guide bends 2. Conversely, when it is necessary to increase the number of capillary bends 51, the rubber post 526 is first connected to the arc rail 522 at the edge, and each limiting cylinder 523 is connected and fixed to the limiting cylinder 523 at the edge through the guide post 54, so as to achieve the effect of adjusting the number of capillary bends 51 inside the guide bends 2.

[0034] Two sets of pipe clamps 521 are fixedly connected to the outside of each capillary bend 51. Each set of pipe clamps 521 includes two semi-enclosed pipe clamps 521. The two sets of pipe clamps 521 connect one capillary bend 51 to capillary bends 51 in the horizontal and vertical directions respectively. In other words, a capillary bend 51 is simultaneously affected by the connection effect of two rotating rods 53 in the horizontal and vertical directions. That is, when the horizontal distance between the entire capillary bend 51 increases, the position of the rubber column 526 inside a set of arc rails 522 on the capillary bend 51 slides, so that the angle between the rotating rod 53 and the axis of the two connected capillary bends 51 decreases. If it is necessary to change the overall horizontal and vertical distance at the same time, the rotating rods 53 on the two sets of connecting components 52 need to be adjusted at the same time.

[0035] Based on initial observation, the flow rate entering the inlet of the guide bend 2 is determined. If the user believes that the flow rate is too high and may cause interference from the vibration between the capillary bends 51, the distance between the capillary bends 51 is increased. The rotating rod 53 is then held by tweezers and rotated in the axial direction, thereby causing the rubber columns 526 at both ends of the rotating rod 53 to push outwards from the arc rail 522. After the movement, the rubber columns 526 are fixed in position under the limit of the new positioning groove 525 until further adjustment is made using tweezers or other tools. Conversely, if the flow rate is considered too low and the number of capillary bends 51 needs to be increased to improve measurement accuracy, the rotating rod 53 is rotated in a direction deviating from the axial direction. Example

[0036] Figure 4-6 As shown, the outer wall of the connecting component 52 is provided with a protective mechanism 9. The protective mechanism 9 includes a first fixing frame 91 and a second fixing frame 92. A protective sponge 93 is provided at the center of the inner part of the first fixing frame 91. The protective sponge 93 overlaps with the outer wall of the capillary bend 51. A flat groove 99 is provided on the outer wall of the first fixing frame 91, and an extrusion groove 95 is provided on the bottom wall of the flat groove 99.

[0037] A spring sheet 96 is fixedly connected to the inner bottom wall of the extrusion groove 95, and a spring-loaded block 98 is fixedly connected to the top of the spring sheet 96. A baffle 94 is provided above the spring-loaded block 98. The baffle 94 is fixedly connected to the inner side wall of the flat groove 99, and a limiting plate 97 is slidably connected to the bottom end of the baffle 94. The limiting plate 97 is fixedly connected to the outer side wall of the second fixed frame 92.

[0038] In this embodiment, after determining the number of capillary bends 51, the outer side of the connecting component 52 is protected by a protective sponge 93. At the same time, the two ends of the protective sponge 93 are respectively fastened to the first fixing frame 91 and the second fixing frame 92, so that the protective sponge 93 and the capillary bend 51 no longer slip sideways, thus avoiding the problem of the protective sponge 93 separating from the connecting component 52 again.

[0039] When the second fixed frame 92 is fastened to the first fixed frame 91, the limiting plate 97 is aligned with the flat groove 99, and then the limiting plate 97 is pushed upward to limit the mutual positioning between the limiting plate 97 and the baffle 94, preventing the limiting plate 97 from detaching from the baffle 94. At the same time, the elastic force of the spring piece 96 pushes the spring block 98 upward, thereby causing the spring block 98 to squeeze the limiting plate 97 and the baffle 94, increasing the friction between the limiting plate 97 and the baffle 94, making the limiting plate 97 and the baffle 94 more tightly fastened, and achieving the effect of fixing the second fixed frame 92 and the first fixed frame 91. Example

[0040] according to Figure 1-5 As shown, a guide bend 2 is sleeved on the outer side of the tube assembly 5. Flanges 3 are fixedly connected to both ends of the guide bend 2, and multiple mounting holes 31 are present on the outer side wall of the flanges 3. The middle of the guide bend 2 is recessed to form an inverted conical structure, and a vibration pickup sensor assembly 6 is fixedly connected to the middle of the outer side wall of the guide bend 2. Excitation sensor assemblies 7 are provided at both ends of the vibration pickup sensor assembly 6, and the excitation sensor assemblies 7 are fixedly connected to the outer side wall of the guide bend 2. A signal conversion assembly 8 is located above the top of the vibration pickup sensor assembly 6. The inner side wall of the outer casing 1 is fixedly connected to the outer side wall of the guide bend 2, and the outer side wall of the signal conversion assembly 8 is fixedly connected to the inner side wall of the outer casing 1. A detection dial 4 is located 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 outer casing 1, and the outer side wall of the first fixing frame 91 is fixedly connected to the inner side wall of the guide bend 2.

[0041] In this embodiment, flanges 3 are provided at both ends of the guide bend 2, and multiple mounting holes 31 are opened on the surface of the flanges 3 to facilitate the sealing connection between the flanges 3 and the inlet and outlet pipes. The middle end of the guide bend 2 is connected to the vibration pickup sensor assembly 6, and excitation sensor assemblies 7 are also provided at both ends of the vibration pickup sensor assembly 6. When the fluid mass is different, the vibration energy on both sides is different. The vibration data of the internal capillary bend 51 is collected by the excitation sensor assembly 7 and summarized on the signal conversion assembly 8. After the structure is calculated, the fluid mass is obtained, and the result is reflected by the pointer reading on the surface of the detection dial 4.

[0042] The usage and working principle of this device are as follows: After preliminary observation, the flow rate of water entering the inlet of the guide bend 2 is determined. When the user believes that the flow rate is too high and may cause interference from the vibration between the capillary bends 51, the rotating rod 53 is held by tweezers and rotated in the axial direction. The two ends of the rotating rod 53 drive the rubber column 526 to push outwards to the arc rail 522. After the movement, the rubber column 526 is fixed in position under the limit of the new positioning groove 525.

[0043] At the same time, the horizontal and vertical connecting components 52 at the edge are removed, so that the limiting cylinder 523 is disengaged from the guide post 54, and the rubber post 526 is removed from the two ends of the arc rail 522, so that the entire horizontal or vertical capillary tube 51 is disengaged from the overall tube mechanism 5, and is pulled out from one opening of the guide tube 2.

[0044] When the lateral distance between the entire capillary bends 51 increases, the rubber column 526 inside a set of arc rails 522 on the capillary bends 51 slides, causing the angle between the rotating rod 53 and the axis of the two connected capillary bends 51 to decrease, increasing the distance between the capillary bends 51. After the distance between the capillary bends 51 increases, the mutual interference effect is weakened, and the measurement accuracy is improved.

[0045] When the user believes that the flow rate is too low and it is necessary to increase the number of capillary bends 51 to improve the measurement accuracy, the rotating rod 53 is rotated in a direction away from the axis to reduce the space occupied by a certain number of capillary bends 51, so that the tube structure 5 can reserve more space.

[0046] Then, the rubber column 526 is fitted with the arc rail 522 at the edge, and each limiting cylinder 523 is connected and fixed to the limiting cylinder 523 at the edge through the guide column 54, so that more capillary bends 51 for measurement are placed inside the guide bend 2. Under the condition that the capillary bends 51 do not vibrate and interfere with each other, the more capillary bends 51 there are, the more accurate the flow meter measurement results will be.

[0047] When measuring fluid mass, the vibration energy on both sides is different. The vibration data of the internal capillary bend 51 is collected by the excitation sensing assembly 7 and summarized on the signal conversion assembly 8. After the structure is processed, the fluid mass is obtained, and the result is reflected by the pointer reading on the surface of the detection dial 4.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A micro-bend tubular mass flow meter, comprising a housing (1) and a tubular mechanism (5), characterized in that: The tube assembly (5) includes multiple capillary bends (51). Two connecting components (52) for connecting adjacent capillary bends (51) are provided on the outer wall of each capillary bend (51). Each connecting component (52) includes two pipe clamps (521). An arc-shaped rail (522) is fixedly connected to the outer wall of each pipe clamp (521). Rubber columns (526) are slidably connected to the inner wall of each arc-shaped rail (522). Two connecting components (52) located on adjacent capillary bends (51) and positioned opposite each other are rotatably connected by a rotating rod (53). The two ends of the rotating rod (53) are respectively fixed... A rubber column (526) is connected, and multiple positioning grooves (525) are provided on both inner sidewalls of the arc rail (522); a limiting cylinder (523) is fixedly connected at the corner positions of both ends of the pipe clamp (521). The two limiting cylinders (523) on the connecting components located on the two adjacent capillary bends (51) are slidably connected by a guide column (54). A fixing screw (524) is threaded between the two pipe clamps (521). The capillary bends (51) are movably connected by the two pipe clamps (521). Both ends of the arc rail (522) are provided with openings.

2. The micro-bend tubular mass flow meter according to claim 1, characterized in that: The outer wall of the connecting component (52) is provided with a protective mechanism (9), which includes a first fixing frame (91) and a second fixing frame (92). A protective sponge (93) is provided at the center of the inner part of the first fixing frame (91).

3. The micro-bend tubular mass flow meter according to claim 2, characterized in that: The protective sponge (93) overlaps with the outer wall of the capillary bend (51), and 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).

4. The micro-bend tubular mass flow meter according to claim 3, characterized in that: The inner bottom wall of the extrusion groove (95) is fixedly connected to a spring piece (96), the top of the spring piece (96) is fixedly connected to a spring pressure block (98), and a baffle (94) is provided above the spring pressure block (98).

5. A micro-bend tubular mass flow meter according to claim 4, characterized in that: The baffle (94) is fixedly connected to the inner wall of the flat groove (99), and the bottom end of the baffle (94) is slidably connected to the limiting plate (97). The limiting plate (97) is fixedly connected to the outer wall of the second fixed frame (92).

6. A micro-bend tubular mass flow meter according to claim 5, characterized in that: The outer side of the tube assembly (5) is fitted with a guide bend (2), and both ends of the guide bend (2) are fixedly connected with flanges (3). The outer side wall of the flange (3) is provided with multiple mounting holes (31).

7. A micro-bend tubular mass flow meter according to claim 6, characterized in that: The middle position of the guide bend (2) is recessed downward to form an inverted cone structure, and a vibration pickup sensor assembly (6) is fixedly connected to the middle position of the outer side wall of the guide bend (2).

8. A micro-bend tubular mass flow meter according to claim 7, characterized in that: Both ends of the vibration pickup sensing assembly (6) are provided with excitation sensing assemblies (7), the excitation sensing assembly (7) is fixedly connected to the outer wall of the guide bend (2), and a signal conversion assembly (8) is provided above the top of the vibration pickup sensing assembly (6).

9. A micro-bend tubular mass flow meter according to claim 8, characterized in that: The inner wall of the housing (1) is fixedly connected to the outer wall of the guide bend (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 provided above the top of the signal conversion assembly (8).

10. A micro-bend tubular mass flow meter according to claim 9, characterized in that: The bottom end of the detection dial (4) is fixedly connected to the side wall of the outer shell (1), and the outer side wall of the first fixing frame (91) is fixedly connected to the inner side wall of the guide bend (2).

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