Turbine flowmeter
By adopting a split-structure inner tube in the turbine flowmeter to form the medium passing cavity and using guide grooves and guide plates to fix the position of the components, the problem of difficult disassembly and maintenance of existing turbine flowmeters when measuring salt-containing liquids is solved, and convenient maintenance and normal flowmeter operation are achieved.
Patent Information
- Application Number
- CN202422811105.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-19
AI Technical Summary
When existing turbine flowmeters measure liquid media with high salt content, salt is separated out and adheres to the inner wall of the measuring tube and components, making disassembly and maintenance difficult and affecting the normal operation of the flowmeter.
A turbine flowmeter is designed, which adopts a split structure of the first inner tube, the second inner tube and the third inner tube to form a medium passage cavity. The positions of the leading fluid, the trailing fluid and the impeller are fixed by guide grooves and guide plates, making disassembly and maintenance more convenient.
The invention realizes easier disassembly and maintenance of components of the turbine flowmeter in the case of salt adhesion, avoids damage to the mechanical structure caused by the difficulty of disassembly, and ensures the normal operation of the flowmeter.
Smart Images
Figure CN223361507U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of turbine flow equipment, in particular to a turbine flowmeter. Background Art
[0002] Turbine flowmeters are the primary type of impeller flowmeter. Typically, the turbine flow sensor is located outside the pipeline. A turbine flow sensor uses a multi-bladed rotor to sense the average velocity of the fluid, thereby deriving the flow rate or total volume. When the measured fluid flows through the sensor, the impeller is forced to rotate by the fluid. The impeller's speed is proportional to the average flow velocity in the pipeline. This rotation periodically changes the magnetic resistance of the magnetoelectric converter, causing the magnetic flux in the sensing coil to change periodically. This generates a periodic induced potential, or electrical pulse signal, which is amplified by an amplifier and sent to a display instrument for display.
[0003] When a turbine flowmeter is used to measure the flow rate of a liquid medium with a high salt content, the presence of the impeller causes pressure fluctuations in the liquid medium as it passes through the impeller. This leads to salt precipitation and adhesion upstream of the impeller and on the impeller surface. Although the lead fluid, impeller assembly, and backflow fluid in existing turbine flowmeters are all installed using a detachable connection, the precipitated salt adheres to the inner wall of the measuring tube, the lead fluid, the impeller assembly, and the backflow fluid, making it difficult to remove the lead fluid, the impeller assembly, and the backflow fluid from the measuring tube. This requires first clearing the inner wall of the measuring tube, the lead fluid, the impeller assembly, and the backflow fluid of the lead fluid, the impeller assembly, and the backflow fluid before removing them and performing targeted maintenance on them. Finally, the replaced or repaired lead fluid, impeller assembly, and backflow fluid must be reinstalled into the preset positions within the measuring tube before the turbine flowmeter can be put back into operation. During the process of removing salt from the inner wall of the measuring tube, the leading fluid, the impeller assembly, and the trailing fluid, it is easy to damage the corresponding mounting holes and slots, causing the impeller assembly to be unable to be installed in the preset position. Although the newly repaired turbine flowmeter can still provide flow feedback, the increased installation gap causes the impeller assembly to rotate away from the preset position during the flow feedback process. As a result, the change in magnetic flux sensed by the turbine flow sensor due to the rotation of the impeller assembly will also deviate from the actual value. As a result, the repaired turbine flowmeter cannot perform its task properly. Therefore, there is room for improvement in the structure of turbine flowmeters for measuring liquid media with high salt content in the prior art. Even if salt precipitation occurs in the liquid medium passing through the channel, the relevant leading fluid, impeller assembly, and trailing fluid can still be easily removed from the measuring tube. This can avoid excessive damage to the mechanical structure during the cleaning process of attached salt crystals, thereby maintaining the normal operation of the impeller assembly after repair. Summary of the Invention
[0004] In view of the deficiencies in the prior art, the present invention provides a turbine flowmeter that can facilitate the removal of an impeller assembly, a leading fluid, and a trailing fluid from a measuring tube, so as to overcome the defects in the prior art.
[0005] The technical solution adopted by the utility model is: a turbine flowmeter, including a measuring tube, wherein a plurality of guide grooves are provided on the inner wall of the measuring tube and are evenly distributed in a star shape around the central axis of the measuring tube, each guide groove is respectively provided with a first guide plate and a second guide plate, a first connecting ring is provided on one end of the plurality of first guide plates away from the guide groove, a leading fluid is provided on the first connecting ring, a second connecting ring is provided on one end of the plurality of second guide plates away from the guide groove, a trailing fluid is provided on the second connecting ring, a first inner tube is provided on the plurality of first guide plates, a second inner tube is provided on the plurality of second guide plates, a third inner tube is provided on the plurality of first guide plates and the plurality of second guide plates, the third inner tube is located between the first inner tube and the second inner tube, the second inner tube and the third inner tube are abutted against each other, and the third inner tube and the first inner tube are abutted against each other, a rotating shaft is provided on the leading fluid and the trailing fluid, an impeller is provided on the rotating shaft between the leading fluid and the trailing fluid, a signal detector is provided on the measuring tube outside the impeller, and a signal amplifier is provided on the signal detector.
[0006] Preferably, the first inner tube, the second inner tube and the third inner tube all adopt a tubular structure, the end of the first inner tube facing the third inner tube and the end of the second inner tube facing the third inner tube both adopt a step-shaped structure, the shape of the end of the third inner tube facing the first inner tube matches the shape of the end of the first inner tube facing the third inner tube, and the shape of the end of the third inner tube facing the second inner tube matches the shape of the end of the second inner tube facing the third inner tube.
[0007] Preferably, the leading fluid and the trailing fluid both adopt a stepped cylindrical structure, and the leading fluid and the trailing fluid both include a large head end and a small head end, the first connecting ring is movably sleeved on the small head end of the leading fluid, the second connecting ring is movably sleeved on the small head end of the trailing fluid, a leading flow sleeve is provided on the small head end of the trailing fluid on the side of the second connecting ring away from the large head end of the trailing fluid, and a trailing flow sleeve is provided on the small head end of the trailing fluid on the side of the first connecting ring away from the large head end of the leading fluid, and the circumscribed circle diameter of the leading flow sleeve away from the end of the first connecting ring and the circumscribed circle diameter of the trailing flow sleeve away from the end of the second connecting ring gradually decrease from close to the impeller to away from the impeller.
[0008] Preferably, a first connecting groove is provided on the leading fluid guide, one end of the rotating shaft is installed in the first connecting groove, and the end of the rotating shaft located in the first connecting groove cooperates with part of the first connecting groove. A second connecting groove is provided on the rear guide, and the second connecting groove adopts a stepped cylindrical structure including a large head end and a small head end. The other end of the rotating shaft is installed in the second connecting groove, and a pressure block and a spring are sequentially provided in the large head end of the second connecting groove along the direction from close to the rotating shaft to away from the rotating shaft. The adjusting screw is threadedly connected to the second connecting groove, and the shape of the end of the rotating shaft away from the first connecting groove cooperates with the shape of part of the pressure block, and the end of the rotating shaft away from the first connecting groove is movably connected to the pressure block.
[0009] Preferably, the measuring tube is respectively provided with a first flange on one end close to the first inner tube, and a second flange is provided on one end close to the second inner tube. The end of the first flange away from the third inner tube and the end of the second flange away from the third inner tube are respectively provided with mounting grooves. A third connecting ring is provided in the mounting groove of the first flange, and the third connecting ring is sleeved on the first inner tube outside the measuring tube. A fourth connecting ring is provided in the mounting groove of the second flange, and the fourth connecting ring is sleeved on the second inner tube outside the measuring tube. A first connecting hole and a first fixing bolt are provided on the first flange and the third connecting ring, and a second connecting hole and a second fixing bolt are provided on the second flange and the second connecting ring.
[0010] Preferably, a first sealing groove is provided on the third connecting ring on the inner side of the several first connecting holes and the several first fixing bolts, a second sealing groove is provided on the fourth connecting ring on the inner side of the several second connecting holes and the several second fixing bolts, a first sealing ring is provided on the third connecting ring and the first flange, and the first sealing ring is located on the inner side of the several first connecting holes and the several first fixing bolts, a second sealing ring is provided on the fourth connecting ring and the second flange, and the second sealing ring is located on the inner side of the several second connecting holes and the several second fixing bolts.
[0011] The beneficial effects of the utility model are as follows: first, the utility model installs a medium-passing cavity composed of the first inner tube, the second inner tube and the third inner tube in the measuring tube; the first inner tube, the second inner tube and the third inner tube play a limiting role on the first guide plate and the second guide plate, and also fix the relative installation positions of the leading fluid, the trailing fluid and the impeller, making the installation work easy to carry out; at the same time, since the liquid medium directly drives the impeller to rotate through the medium-passing cavity composed of the first inner tube, the second inner tube and the third inner tube, even if salt adheres to the first inner tube, the second inner tube and the third inner tube, since the first inner tube, the second inner tube and the third inner tube adopt a split structure, the disassembly work is easier than directly disassembling from the measuring tube with an integrated structure.
[0012] Secondly, the circumscribed diameter of the front guide sleeve at the end away from the first connecting ring and the circumscribed diameter of the rear guide sleeve at the end away from the second connecting ring of the present invention both gradually decrease in size as they move from the impeller to the impeller. This facilitates the use of the shape of the front guide sleeve at the end away from the first connecting ring and the shape of the rear guide sleeve at the end away from the second connecting ring to guide the passing liquid medium and avoid excessive turbulence in the liquid medium.
[0013] The utility model has the advantages of simple structure, convenient operation, ingenious design, greatly improved work efficiency, good social and economic benefits, and is a product that is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the present utility model.
[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model.
[0016] Figure 3 It is a structural diagram of the components of the utility model. DETAILED DESCRIPTION
[0017] like Figures 1 to 3 As shown, a turbine flowmeter includes a measuring tube 1, wherein the inner wall of the measuring tube 1 is provided with a plurality of guide grooves 2 evenly distributed in a star shape around the central axis of the measuring tube 1, each guide groove 2 is respectively provided with a first guide plate 3 and a second guide plate 4, a plurality of first guide plates 3 are provided with a first connecting ring 5 on one end away from the guide groove 2, a leading fluid 6 is provided on the first connecting ring 5, a plurality of second guide plates 4 are provided with a second connecting ring 7 on one end away from the guide groove 2, a rear fluid 8 is provided on the second connecting ring 7, and a plurality of first guide plates 3 are provided with a first inner tube 9. A second inner tube 10 is provided on several second guide plates 4, and a third inner tube 11 is provided on several first guide plates 3 and several second guide plates 4. The third inner tube 11 is located between the first inner tube 9 and the second inner tube 10. The second inner tube 10 and the third inner tube 11 are offset against each other, and the third inner tube 11 and the first inner tube 9 are offset against each other. A rotating shaft 12 is provided on the leading fluid guide 6 and the trailing fluid guide 8. An impeller 13 is provided on the rotating shaft 12 between the leading fluid guide 6 and the trailing fluid guide 8. A signal detector 14 is provided on the measuring tube 1 outside the impeller 13, and a signal amplifier 15 is provided on the signal detector 14.
[0018] The first inner tube 9, the second inner tube 10, and the third inner tube 11 all have tubular structures. The end of the first inner tube 9 facing the third inner tube 11 and the end of the second inner tube 10 facing the third inner tube 11 both have stepped structures. The shape of the end of the third inner tube 11 facing the first inner tube 9 matches the shape of the end of the first inner tube 9 facing the third inner tube 11. The shape of the end of the third inner tube 11 facing the second inner tube 10 matches the shape of the end of the second inner tube 10 facing the third inner tube 11. This facilitates the use of the first inner tube 9 and the second inner tube 10 to clamp the third inner tube 11 so that the third inner tube 11 can be installed in a preset position.
[0019] Furthermore, the measuring tube 1 is provided with a first flange 23 on one end close to the first inner tube 9, and a second flange 24 is provided on one end close to the second inner tube 10. The end of the first flange 23 away from the third inner tube 11 and the end of the second flange 24 away from the third inner tube 11 are respectively provided with a mounting groove 25. A third connecting ring 26 is provided in the mounting groove 25 of the first flange 23. The third connecting ring 26 is sleeved on the first inner tube 9 outside the measuring tube 1, and the third connecting ring 26 is connected to the first inner tube 9; a fourth connecting ring 27 is provided in the mounting groove 25 of the second flange 24. The fourth connecting ring 27 is sleeved on the second inner tube 10 outside the measuring tube 1, and the fourth connecting ring 27 is connected to the second inner tube 10; The first flange 23 and the third connecting ring 26 are provided with first connecting holes 28 and first fixing bolts 29. Several first connecting holes 28 facilitate connecting pipe connectors near the first flange 23. The second flange 24 and the second connecting ring 7 are provided with second connecting holes 30 and second fixing bolts 31. Several second connecting holes 30 facilitate connecting pipe connectors near the second flange 24. The first connecting holes 28, first fixing bolts 29, second connecting holes 30, and second fixing bolts 31 are all provided in a plurality, and the plurality of first connecting holes 28, first fixing bolts 29, second connecting holes 30, and second fixing bolts 31 are evenly distributed in a star shape around the central axis of the measuring tube 1. This facilitates guiding the first inner tube 9 using the third connecting ring 26 and the first flange 23 so that the first inner tube 9 can be installed in a predetermined installation position. It also facilitates guiding the second inner tube 10 using the second flange 24 and the fourth connecting ring 27 so that the second inner tube 10 can be installed in a predetermined installation position.
[0020] Furthermore, a first sealing groove 32 is provided on the third connecting ring 26 inside the several first connecting holes 28 and the several first fixing bolts 29, and a second sealing groove 33 is provided on the fourth connecting ring 27 inside the several second connecting holes 30 and the several second fixing bolts 31. The first sealing groove 32 and the second sealing groove 33 are provided to facilitate the installation of sealing rings to seal the gap between the first flange 23 and the corresponding pipe connecting piece and the gap between the second flange 24 and the corresponding pipe connecting piece; a first sealing ring 34 is provided on the third connecting ring 26 and the first flange 23, and the installation of the first sealing ring 34 facilitates the sealing of the gap between the third connecting ring 26 and the first flange 23; the first sealing ring 34 is located on the inner sides of the several first connecting holes 28 and the several first fixing bolts 29, and a second sealing ring 35 is provided on the fourth connecting ring 27 and the second flange 24, and the installation of the second sealing ring 35 facilitates the sealing of the gap between the fourth connecting ring 27 and the second flange 24; the second sealing ring 35 is located on the inner sides of the several second connecting holes 30 and the several second fixing bolts 31.
[0021] The leading fluid guide 6 and the trailing fluid guide 8 both adopt a stepped cylindrical structure. The leading fluid guide 6 and the trailing fluid guide 8 both include a large end and a small end. The first connecting ring 5 is movably mounted on the small end of the leading fluid guide 6. The second connecting ring 7 is movably mounted on the small end of the trailing fluid guide 8. The second connecting ring 7 is away from the small end of the trailing fluid guide 8 on the side of the large end of the trailing fluid guide 8. A leading guide sleeve 16 is provided on the small end of the trailing fluid guide 8. The leading guide sleeve 16 is threadedly connected to the small end of the leading fluid guide 6. The installation of the leading guide sleeve 16 is convenient for fixing. The relative position of the first connecting ring 5 is fixed; a rear guide sleeve 17 is provided on the small end of the rear guide body 8 on the side of the large end of the first connecting ring 5 away from the front guide body 6. The rear guide sleeve 17 is threadedly connected to the small end of the rear guide body 8. Installing the rear guide sleeve 17 facilitates fixing the relative position of the second connecting ring 7; the circumscribed circle diameter of the end of the front guide sleeve 16 away from the first connecting ring 5 and the circumscribed circle diameter of the end of the rear guide sleeve 17 away from the second connecting ring 7 both gradually decrease from the direction close to the impeller 13 to the direction away from the impeller 13. This facilitates the use of the shape of the front guide sleeve 16 away from the first connecting ring 5 and the shape of the rear guide sleeve 17 away from the second connecting ring 7 to guide the passing liquid medium to avoid excessive turbulence of the liquid medium.
[0022] The leading fluid guide 6 is provided with a first connecting groove 18, one end of the rotating shaft 12 is mounted in the first connecting groove 18, and the end of the rotating shaft 12 located in the first connecting groove 18 cooperates with a portion of the first connecting groove 18. The trailing fluid guide 8 is provided with a second connecting groove 19, which adopts a stepped cylindrical structure including a large end and a small end. The other end of the rotating shaft 12 is mounted in the second connecting groove 19. The large end of the second connecting groove 19 is provided with a pressure block 20, a spring 21, and an adjusting screw 22 in sequence from close to the rotating shaft 12 to away from the rotating shaft 12. The adjusting screw 22 is threadedly connected to the second connecting groove 19. The shape of the end of the rotating shaft 12 away from the first connecting groove 18 matches the shape of a portion of the pressure block 20, and the end of the rotating shaft 12 away from the first connecting groove 18 is movably connected to the pressure block 20. This facilitates the use of the pressure block 20 and the first connecting groove 18 to limit the rotating shaft 12, thereby reducing the excessive displacement of the impeller 13 during the process of the liquid medium driving the impeller 13 to rotate.
[0023] The method of using this product is as follows: Figures 1 to 3 As shown, the following steps are included:
[0024] First, install the product in the pre-set installation position. The upstream medium enters the inner cavity of the first inner tube 9 from one end. Then, it is guided by the front guide sleeve 16 and several first guide plates 3 and enters the inner cavity of the third inner tube 11. After that, it drives the impeller 13 to rotate, continues to move along the inner cavity of the third inner tube 11, and is guided by several second guide plates 4 and transported to the inner cavity of the second inner tube 10. Finally, it is discharged from the second inner tube 10 into the downstream pipeline. During this period, the signal detector 14 feedbacks the signal value based on the impeller 13, and the signal amplifier 15 converts it into flow parameters and feeds it back to the staff.
[0025] When maintenance is required, after disassembling the product from its pre-set installation position, first remove several first fixing bolts 29 to remove the third connecting ring 26 from the first flange 23, and then use the third connecting ring 26 to remove the first inner tube 9. Then, remove several second fixing bolts 31 to remove the fourth connecting ring 27 from the second flange 24, and then use the third connecting ring 27 to remove the second inner tube 10. Then, remove the third inner tube 11 and its components, including the first guide plate 3, second guide plate 4, first connecting ring 5, front guide 6, second connecting ring 7, rear guide 8, rotating shaft 12, impeller 13, front guide sleeve 16, and rear guide sleeve 17, from the measuring tube 1. Finally, remove the front guide sleeve 16 and rear guide sleeve 17 to complete the product disassembly. After repairing the required components, reinstall them to complete the maintenance task.
[0026] According to this embodiment, a medium passage cavity composed of the first inner tube 9, the second inner tube 10 and the third inner tube 11 is installed in the measuring tube 1; the first inner tube 9, the second inner tube 10 and the third inner tube 11 limit the first guide plate 3 and the second guide plate 4, and also fix the relative installation positions of the leading fluid 6, the trailing fluid 8 and the impeller 13; so that the installation work is easy to carry out; at the same time, because the liquid medium directly drives the impeller 13 to rotate through the medium passage cavity composed of the first inner tube 9, the second inner tube 10 and the third inner tube 11, even if salt adheres to the first inner tube 9, the second inner tube 10 and the third inner tube 11, since the first inner tube 9, the second inner tube 10 and the third inner tube 11 adopt a split structure, it is easier to disassemble them than directly disassembling them from the measuring tube 1 with an integrated structure.
[0027] The embodiments described above are only preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structure, features and principles described in the patent scope of the present invention should be included in the scope of the patent application of the present invention.
Claims
1. A turbine flowmeter, characterized in that: The measuring tube (1) comprises a plurality of guide grooves (2) uniformly distributed in a star shape around the central axis of the measuring tube (1) on the inner wall of the measuring tube (1), a first guide plate (3) and a second guide plate (4) are respectively provided on each guide groove (2), a first connecting ring (5) is provided on one end of the plurality of first guide plates (3) away from the guide groove (2), a leading fluid (6) is provided on the first connecting ring (5), a second connecting ring (7) is provided on one end of the plurality of second guide plates (4) away from the guide groove (2), a rear fluid (8) is provided on the second connecting ring (7), a first inner tube (9) is provided on the plurality of first guide plates (3), and a plurality of second guide plates (4) are provided. A second inner tube (10) is provided on the first guide plates (3) and the second guide plates (4). A third inner tube (11) is provided on the first inner tube (9) and the second inner tube (10). The second inner tube (10) and the third inner tube (11) are offset against each other. The third inner tube (11) and the first inner tube (9) are offset against each other. A rotating shaft (12) is provided on the leading fluid (6) and the trailing fluid (8). An impeller (13) is provided on the rotating shaft (12) between the leading fluid (6) and the trailing fluid (8). A signal detector (14) is provided on the measuring tube (1) outside the impeller (13). A signal amplifier (15) is provided on the signal detector (14).
2. The turbine flowmeter according to claim 1, characterized in that: The first inner tube (9), the second inner tube (10) and the third inner tube (11) all adopt a tubular structure. The end of the first inner tube (9) facing the third inner tube (11) and the end of the second inner tube (10) facing the third inner tube (11) both adopt a step-shaped structure. The shape of the end of the third inner tube (11) facing the first inner tube (9) matches the shape of the end of the first inner tube (9) facing the third inner tube (11). The shape of the end of the third inner tube (11) facing the second inner tube (10) matches the shape of the end of the second inner tube (10) facing the third inner tube (11).
3. The turbine flowmeter according to claim 1, characterized in that: The leading fluid (6) and the trailing fluid (8) both adopt a stepped cylindrical structure. The leading fluid (6) and the trailing fluid (8) both include a large head end and a small head end. The first connecting ring (5) is movably sleeved on the small head end of the leading fluid (6). The second connecting ring (7) is movably sleeved on the small head end of the trailing fluid (8). A leading flow sleeve (16) is provided on the small head end of the trailing fluid (8) on the side of the second connecting ring (7) away from the large head end of the trailing fluid (8). A trailing flow sleeve (17) is provided on the small head end of the trailing fluid (8) on the side of the first connecting ring (5) away from the large head end of the leading fluid (6). The circumscribed circle diameter of the leading flow sleeve (16) at one end away from the first connecting ring (5) and the circumscribed circle diameter of the trailing flow sleeve (17) at one end away from the second connecting ring (7) both gradually decrease in a direction from close to the impeller (13) to far away from the impeller (13).
4. The turbine flowmeter according to claim 1, characterized in that: The leading fluid guide (6) is provided with a first connecting groove (18), one end of the rotating shaft (12) is installed in the first connecting groove (18), and the end of the rotating shaft (12) located in the first connecting groove (18) matches with a part of the first connecting groove (18). A second connecting groove (19) is provided on the trailing fluid guide (8), and the second connecting groove (19) adopts a stepped cylindrical structure including a large head end and a small head end. The other end of the rotating shaft (12) is installed in the second connecting groove (19), and a pressure block (20), a spring (21) and an adjusting screw (22) are sequentially provided in the large head end of the second connecting groove (19) along the direction from close to the rotating shaft (12) to away from the rotating shaft (12). The adjusting screw (22) is threadedly connected to the second connecting groove (19), and the shape of the end of the rotating shaft (12) away from the first connecting groove (18) matches with the shape of a part of the pressure block (20), and the end of the rotating shaft (12) away from the first connecting groove (18) is movably connected to the pressure block (20).
5. The turbine flowmeter according to claim 1, characterized in that: The measuring tube (1) is provided with a first flange (23) on one end close to the first inner tube (9), a second flange (24) is provided on one end close to the second inner tube (10), an installation groove (25) is provided on one end of the first flange (23) away from the third inner tube (11) and an end of the second flange (24) away from the third inner tube (11), a third connecting ring (26) is provided in the installation groove (25) of the first flange (23), and the third connecting ring (26) is sleeved A fourth connecting ring (27) is provided in a mounting groove (25) of a second flange (24) mounted on a first inner tube (9) outside the measuring tube (1). The fourth connecting ring (27) is sleeved on the second inner tube (10) outside the measuring tube (1). A first connecting hole (28) and a first fixing bolt (29) are provided on the first flange (23) and the third connecting ring (26). A second connecting hole (30) and a second fixing bolt (31) are provided on the second flange (24) and the second connecting ring (7).
6. The turbine flowmeter according to claim 5, characterized in that: A first sealing groove (32) is provided on the third connecting ring (26) inside the plurality of first connecting holes (28) and the plurality of first fixing bolts (29), a second sealing groove (33) is provided on the fourth connecting ring (27) inside the plurality of second connecting holes (30) and the plurality of second fixing bolts (31), a first sealing ring (34) is provided on the third connecting ring (26) and the first flange (23), and the first sealing ring (34) is located inside the plurality of first connecting holes (28) and the plurality of first fixing bolts (29), a second sealing ring (35) is provided on the fourth connecting ring (27) and the second flange (24), and the second sealing ring (35) is located inside the plurality of second connecting holes (30) and the plurality of second fixing bolts (31).