Vibration stopping sheet for fixing vibration tube of Coriolis mass flow sensor

Abstract

The utility model relates to a vibration stopping piece for fixing Coriolis mass flow sensor vibration tubes, and relates to the technical field of Coriolis mass flowmeters, the vibration stopping piece comprises more than two splicing pieces, each splicing piece is provided with at least one splicing notch, all the splicing pieces are spliced on bent tube sections of more than two vibration tubes through the splicing notches, and the splicing pieces are spliced on the bent tube sections of more than two vibration tubes through the splicing notches. All the splicing notches in the periphery of each vibration tube are jointly combined to form a connecting hole matched with the outer wall of the vibration tube, the adjacent splicing pieces are fixedly connected, and the spliced vibration stopping pieces are connected with the vibration tubes in a vacuum brazing mode. The vibration stopping piece has the advantages that the vibration stopping piece can be conveniently, rapidly and flexibly installed on the bent pipe sections of the two or more vibration pipes, and the high welding gap requirement of vacuum brazing can be met.

Description

Technical Field

[0001] This application relates to the technical field of Coriolis mass flow meters, and in particular to a vibration damping plate for fixing the vibrating tube of a Coriolis mass flow sensor. Background Technology

[0002] Coriolis mass flow sensors are resonant sensors. Vibration damping plates are installed at specific locations within the internal vibrating tube to reduce the vibration energy leaked outward during sensor operation, and also to prevent vibration crosstalk between the vibrating tube and the pipes installed on both sides.

[0003] Existing vibration damping plates are slidably fitted onto the vibrating tube via sliding holes and then vacuum brazed. To ensure the welding quality of the vacuum brazing, a welding gap of 0.03-0.1 mm needs to be left between the vibration damping plate and the vibrating tube. In straight sections of the vibrating tube, the welding gap for vacuum brazing is usually ensured by machining precision. However, for curved sections of Coriolis mass flow sensors with two or more vibrating tubes, the size of the sliding holes on the vibration damping plate needs to be appropriately increased to ensure that the vibration damping plate can flexibly slide and fit onto the curved sections of two or more vibrating tubes.

[0004] In the above scheme, increasing the size of the sliding hole of the vibration damping plate will cause the assembly error between the side wall of the sliding hole and the outer wall of the vibrating tube to exceed the welding gap requirement, which will easily reduce the quality of vacuum brazing and thus affect the stable resonance state of the sensor. Utility Model Content

[0005] In order to enable the vibration damping pad to be installed conveniently, quickly and flexibly on the bend of two or more vibrating tubes, and to meet the high welding gap requirements of vacuum brazing, this application provides a vibration damping pad for fixing the vibrating tube of a Coriolis mass flow sensor.

[0006] This application provides a vibration damping plate for fixing the vibrating tube of a Coriolis mass flow sensor, employing the following technical solution:

[0007] A vibration damping plate for fixing the vibrating tube of a Coriolis mass flow sensor includes two or more splicing pieces, each splicing piece having at least one splicing notch. All the splicing pieces are assembled on the curved sections of two or more vibrating tubes through the splicing notches. All the splicing notches around each vibrating tube are combined to form a connection hole that fits the outer wall of the vibrating tube. Adjacent splicing pieces are fixedly connected, and the assembled vibration damping plate is vacuum brazed to the vibrating tube.

[0008] By adopting the above technical solution, the splicing pieces are assembled around the vibrating tube in a splicing manner, so that the vibration damping pieces do not need to be slid onto the bends of the vibrating tube as a whole. This makes it easy to directly install the vibration damping pieces on the bends of two or more vibrating tubes. At the same time, the splicing notch forms a connection hole that fits the outer wall of the vibrating tube after assembly, which can ensure the welding gap requirements between the vibration damping pieces and the vibrating tube, thereby ensuring the welding quality of the vacuum brazing between the vibration damping pieces and the vibrating tube, and improving the stability of the Coriolis mass flow sensor resonance.

[0009] Optionally, two adjacent splicing pieces may be overlapped.

[0010] By adopting the above technical solution, the overlapping method of connecting two splicing pieces helps to achieve a fixed connection between the two splicing pieces, and makes the two splicing pieces easy to stabilize after being fixed.

[0011] Optionally, the number of splicing pieces is two, and the number of splicing notches on each splicing piece is the same as the number of vibrating tubes, with each splicing notch on the splicing piece corresponding to a vibrating tube.

[0012] By adopting the above technical solution, two splicing pieces can be directly assembled onto two or more vibration tubes, which improves the splicing efficiency of the vibration damping pieces and reduces the overall splicing difficulty of the vibration damping pieces.

[0013] Optionally, all the splicing pieces are divided into two types. The first type of splicing piece is the first splicing piece, and there are two first splicing pieces with one splicing notch. The second type of splicing piece is the second splicing piece, and there is at least one second splicing piece with two splicing notches. The two first splicing pieces are respectively located on the side of the two outermost vibrating tubes that are far apart from each other, and at least one second splicing piece is respectively located between two adjacent vibrating tubes.

[0014] By adopting the above technical solution, the positional accuracy requirements between two adjacent vibrating tubes are reduced by connecting two adjacent vibrating tubes with a single second splicing piece. Especially when the number of vibrating tubes is greater than two, the adjacent second splicing pieces can connect multiple vibrating tubes by tilting. The two first splicing pieces are respectively set on the side of the two outermost vibrating tubes that are far apart from each other, so that the vibration damping piece can be connected to all vibrating tubes under the condition of meeting the welding gap, which enhances the flexibility of vibration damping piece assembly.

[0015] Optionally, the thickness of the splicing piece is 0.1-0.7 mm.

[0016] By adopting the above technical solution, the thickness of the splicing piece can meet its own strength requirements and is not likely to affect the vacuum brazing of the vibration damping piece and the vibration tube.

[0017] Optionally, the diameter of the connecting hole is at least 0.1 mm larger than the outer diameter of the vibrating tube.

[0018] By adopting the above technical solution, the welding gap between the vibration damping plate and the vibration tube can easily meet the requirements of vacuum brazing.

[0019] Optionally, the roughness of the inner surface of the connecting hole is better than Ra1.6.

[0020] By adopting the above technical solution, it is beneficial to the uniform flow and siphoning of brazing solder.

[0021] Optionally, two adjacent splice pieces are spot-welded together.

[0022] By adopting the above technical solution, it is easy to fix the splicing pieces to form vibration damping pieces.

[0023] Optionally, the splicing pieces are made of stainless steel.

[0024] By adopting the above technical solution, the splicing pieces are less prone to corrosion, thus extending their service life.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. By setting splicing pieces and opening splicing notches on the splicing pieces, the vibration damping pieces can be easily installed directly on the bends of two or more vibrating tubes, and can meet the high welding gap requirements of vacuum brazing.

[0027] 2. By setting the number of splicing pieces to two, and ensuring that the number of splicing notches on each splicing piece matches the number of vibrating tubes, the splicing efficiency of the vibration damping pieces is improved, and the overall splicing difficulty of the vibration damping pieces is reduced.

[0028] 3. All splicing pieces are divided into two types. There are two splicing pieces of the first type, which are respectively set on the two outermost vibrating tubes on the side away from each other. There is at least one splicing piece of the second type, which is set between two adjacent vibrating tubes. This reduces the positional accuracy requirements between two adjacent vibrating tubes and enhances the flexibility of vibration damping piece assembly. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0030] Figure 2 This is a schematic diagram of the connection hole structure in Embodiment 1 of this application;

[0031] Figure 3 This is a schematic diagram of the structure of Embodiment 2 of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Splicing piece; 2. Splicing notch; 3. Vibrating tube; 4. Connecting hole; 5. First splicing piece; 6. Second splicing piece. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0035] This application discloses a vibration damping plate for fixing the vibrating tube of a Coriolis mass flow sensor. Example 1:

[0036] Reference Figure 1 and Figure 2 This embodiment uses two vibrating tubes 3 as an example for illustration. A vibration damping plate for fixing the vibrating tube of a Coriolis mass flow sensor includes two or more splicing pieces 1. Each splicing piece 1 has at least one splicing notch 2. All splicing pieces 1 are assembled on the curved section of two or more vibrating tubes 3 through the splicing notches 2. All the splicing notches 2 around each vibrating tube 3 are combined to form a connecting hole 4 that is adapted to the outer wall of the vibrating tube 3. Adjacent splicing pieces 1 are fixedly connected. The assembled vibration damping plate is vacuum brazed to the vibrating tube 3.

[0037] The splicing piece 1 is assembled around the vibrating tube 3 by splicing, so that the vibration damping piece does not need to be slid onto the bend of the vibrating tube 3 as a whole. This makes it easy to directly install the vibration damping piece on the bend of two or more vibrating tubes 3. At the same time, the splicing notch 2 forms a connection hole 4 that fits the outer wall of the vibrating tube 3 after assembly, which can ensure the welding gap requirements between the vibration damping piece and the vibrating tube 3, so as to ensure the welding quality of the vacuum brazing between the vibration damping piece and the vibrating tube 3 and improve the stability of the Coriolis mass flow sensor resonance.

[0038] Furthermore, referring to Figure 1 The two adjacent splicing pieces 1 are connected by overlapping. This overlapping method helps to achieve a fixed connection between the two splicing pieces 1 and makes the two splicing pieces 1 easy to stabilize after being fixed.

[0039] In this embodiment, refer to Figure 1 The number of splicing pieces 1 is preferably two, and the number of splicing notches 2 on each splicing piece 1 is the same as the number of vibrating tubes 3. The splicing notches 2 on the splicing piece 1 correspond one-to-one with the vibrating tubes 3.

[0040] By directly assembling two splicing pieces 1 onto two or more vibration tubes 3, the splicing efficiency of the vibration damping pieces is improved, and the overall splicing difficulty of the vibration damping pieces is reduced.

[0041] Reference Figure 1 In order to ensure that the thickness of the splicing piece 1 meets its own strength requirements and does not easily affect the vacuum brazing of the vibration damping plate and the vibration tube 3, the thickness of the splicing piece 1 is 0.1-0.7mm.

[0042] Reference Figure 2 In order to make the welding gap between the vibration damping plate and the vibration tube 3 easily meet the requirements of vacuum brazing, the diameter of the connecting hole 4 is more than 0.1 mm larger than the outer diameter of the vibration tube 3.

[0043] Reference Figure 2 To facilitate uniform flow and siphoning of the brazing solder, the surface roughness of the inner surface of the connecting hole 4 is better than Ra1.6.

[0044] Reference Figure 1 To facilitate the fixing of splicing piece 1 into a vibration damping piece, two adjacent splicing pieces 1 are spot welded together.

[0045] Reference Figure 1 To prevent the splicing piece 1 from rusting and to extend its service life, the splicing piece 1 is made of stainless steel.

[0046] The implementation principle of a vibration damping plate for fixing a Coriolis mass flow sensor vibrating tube in this application embodiment is as follows: In use, the splicing piece 1 is assembled onto the vibrating tube 3 through the splicing notch 2, so that the vibration damping plate is directly installed on the bend section of the vibrating tube 3 by splicing. Then, adjacent splicing pieces 1 are spot welded together. The connection holes 4 formed by all the splicing notches 2 around the vibrating tube 3 can be adapted to the outer wall of the vibrating tube 3 to leave a just right welding gap. Thus, the vibration damping plate can not only be conveniently, quickly and flexibly installed on the bend section of two or more vibrating tubes, but also meet the high welding gap requirements of vacuum brazing. Example 2:

[0047] Reference Figure 3 This embodiment uses four vibrating tubes 3 as an example for illustration. The difference between this embodiment and embodiment 1 is that all splicing pieces 1 are divided into two types. The first type of splicing piece 1 is the first splicing piece 5, and there are two first splicing pieces 5, and the number of splicing notches 2 on the first splicing piece 5 is one. The second type of splicing piece 1 is the second splicing piece 6, and there is at least one second splicing piece 6, and the number of splicing notches 2 on the second splicing piece 6 is two. The two first splicing pieces 5 are respectively set on the side of the two outermost vibrating tubes 3 that are far away from each other, and at least one second splicing piece 6 is respectively set between two adjacent vibrating tubes 3.

[0048] By connecting two adjacent vibrating tubes 3 with a single second splicing piece 6, the positional accuracy requirements between two adjacent vibrating tubes 3 are reduced. Especially when the number of vibrating tubes 3 is greater than two, the adjacent second splicing pieces 6 can connect multiple vibrating tubes 3 by tilting. The two first splicing pieces 5 are respectively set on the side of the two outermost vibrating tubes 3 that are far apart from each other, so that the vibration damping piece can be connected to all the vibrating tubes 3 under the condition of meeting the welding gap, which enhances the flexibility of vibration damping piece assembly.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A baffle for securing a vibrating tube of a Coriolis mass flow sensor, the baffle comprising: The vibration damping sheet comprises two or more than two splicing pieces (1), at least one splicing gap (2) is arranged on each splicing piece (1), all the splicing pieces (1) are assembled on the bent pipe sections of two or more than two vibration pipes (3) through the splicing gaps (2), all the splicing gaps (2) around each vibration pipe (3) are combined to form a connecting hole (4) matched with the outer wall of the vibration pipe (3), the adjacent splicing pieces (1) are fixedly connected, and the assembled vibration damping sheet is connected with the vibration pipe (3) through vacuum brazing.

2. A vibration stopper for securing a vibrating tube of a Coriolis mass flow sensor according to claim 1, characterized in that: The adjacent two splicing pieces (1) are arranged in overlap.

3. A vibration stopper for securing a vibrating tube of a Coriolis mass flow sensor according to claim 2, characterized in that: The number of the splicing pieces (1) is two, the number of the splicing gaps (2) on each splicing piece (1) is consistent with the number of the vibration pipes (3), and the splicing gap (2) on the splicing piece (1) corresponds to the vibration pipe (3) one by one.

4. The anti-vibration tab for securing a vibrating element of a Coriolis mass flow sensor of claim 2, wherein: All the splicing pieces (1) are divided into two types, the first splicing piece (5) is the first type of splicing piece (1), the number of the first splicing piece (5) is two, the number of the splicing gap (2) on the first splicing piece (5) is one, the second splicing piece (6) is the second type of splicing piece (1), the number of the second splicing piece (6) is at least one, the number of the splicing gap (2) on the second splicing piece (6) is two, the two first splicing pieces (5) are arranged on the sides away from each other of the two outermost vibration pipes (3), and the at least one second splicing piece (6) is arranged between the adjacent two vibration pipes (3).

5. The anti-vibration tab for securing a vibrating element of a Coriolis mass flow sensor of claim 1, wherein: The thickness of the splicing piece (1) is 0.1-0.7mm.

6. A vibration stopper for securing a vibrating tube of a Coriolis mass flow sensor according to claim 1, characterized in that: The aperture of the connecting hole (4) is greater than the outer diameter of the vibration pipe (3) by more than 0.1mm.

7. The anti-vibration tab for securing a vibrating element of a Coriolis mass flow sensor of claim 1, wherein: The roughness of the inner surface of the connecting hole (4) is better than Ra1.

6.

8. The anti-vibration tab for securing a vibrating element of a Coriolis mass flow sensor of claim 1, wherein: The adjacent two splicing pieces (1) are connected through spot welding.

9. The anti-vibration tab for securing a vibrating element of a Coriolis mass flow sensor of claim 1, wherein: The splicing piece (1) is made of stainless steel.

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