Turbine flowmeter

Abstract

The utility model discloses a turbine flowmeter which comprises a shell with a through hole and a meter core assembly arranged in the through hole, the meter core assembly comprises a rectification cover, a sleeve, a front flow guide body, a supporting seat, an impeller and a rear flow guide body, the rectification cover is located at the input end of the through hole, the rectification cover comprises a first cover plate and a second cover plate, and the first cover plate is located at the input end of the through hole. The edge of the first cover plate is fixedly connected with the input end of the through hole, the first cover plate is provided with a center shaft and a plurality of first flow channels, the center of the second cover plate is rotatably connected with the center shaft, the second cover plate is provided with a plurality of second flow channels, the second flow channels correspond to the first flow channels one to one, and the first flow channels are communicated with the second flow channels. The shell is provided with a driving assembly used for controlling the second cover plate to rotate. The device has the advantages that the size of the flow channel on the rectifying cover can be flexibly adjusted, and the applicability is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meters, and particularly relates to a turbine flow meter. Background Art

[0002] A turbine flow meter is a commonly used flow measurement instrument. A conventional turbine flow meter, such as a gas turbine flow meter disclosed in the patent application No. CN201620791496.3, includes a housing and a core assembly. A through hole is provided on the housing, and connecting flanges are provided at both ends of the through hole. The core assembly is installed in the through hole. The core assembly includes a rectifying cover, a sleeve, a front guide fluid, a support seat, an impeller, and a rear guide fluid. The sleeve is sleeved in the through hole, and the rectifying cover is fixed at the inlet end of the sleeve. When fluid passes through the turbine flow meter, the impeller rotates, and the flow velocity and flow rate of the fluid can be calculated by detecting the rotation speed of the impeller.

[0003] The rectifying cover is located at the inlet end of the sleeve, which is not only used to stabilize the fluid flow, but also used to protect the blades, preventing the particulate matter or impurities in the fluid from directly hitting the blades and causing blade wear or damage, which helps to extend the service life of the turbine flow meter. For this reason, according to the use environment, if the fluid is relatively clean, a rectifying cover with a larger flow channel can be selected; if the fluid contains particulate matter or impurities that need to be filtered, a rectifying cover with a smaller flow channel needs to be selected. However, the flow channel size of the conventional rectifying cover is fixed and cannot be adjusted according to the actual use environment, so its applicability needs to be improved. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a turbine flow meter that can flexibly adjust the flow channel size of the rectifying cover and has good applicability.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows: A turbine flow meter includes a housing having a through hole and a core assembly disposed in the through hole. The core assembly includes a rectifying cover, a sleeve, a front guide fluid, a support seat, an impeller, and a rear guide fluid. The rectifying cover is located at the input end of the through hole. The rectifying cover includes a first cover plate and a second cover plate. The edge of the first cover plate is fixedly connected to the input end of the through hole. A central shaft and a plurality of first flow channels are provided on the first cover plate. The center of the second cover plate is rotatably connected to the central shaft. A plurality of second flow channels are provided on the second cover plate. The plurality of second flow channels correspond to the plurality of first flow channels one by one. A driving assembly for controlling the rotation of the second cover plate is provided on the housing.

[0006] Preferably, an annular step groove is provided at the input end of the through hole. The first cover plate is fixedly connected to the step groove. The second cover plate is located between the first cover plate and the bottom of the step groove.

[0007] Preferably, a plurality of mounting blocks are fixedly provided at the bottom of the step groove, screw holes and bolts are provided on the mounting blocks, a plurality of mounting holes are provided on the first cover plate, the plurality of mounting holes correspond to and are connected with the plurality of screw holes one by one, and the bolts are threadedly connected with the screw holes after passing through the mounting holes.

[0008] Preferably, a plurality of slots are provided at one end of the first cover plate facing the mounting block, the mounting holes are provided at the bottom of the slots, the plurality of slots correspond to the plurality of mounting blocks one by one, and the slots are covered on the corresponding mounting blocks.

[0009] Preferably, the driving assembly includes a cylinder and a rod body, and the side of the step groove is provided with a first through hole and a second through hole located on the same straight line, the first through hole passes through the outer side of the shell, and the cylinder is fixedly arranged on the outer side of the shell, one end of the rod body is connected to the telescopic shaft of the cylinder, and the other end of the rod body passes through the first through hole and the step groove and extends into the second through hole, the side of the rod body is provided with a tooth portion, and the side of the second cover plate is provided with an outer gear ring, and the tooth portion is meshingly connected with the outer gear ring.

[0010] Preferably, a flange is integrally provided on the outer side surface of the shell, the first through hole passes through the flange, and the oil cylinder is provided on the outer side surface of the flange.

[0011] Preferably, a mounting seat is fixedly provided on the outer side surface of the flange, and the oil cylinder is fixedly provided on the mounting seat.

[0012] Preferably, a plurality of sealing rings are provided between the rod body and the first through hole.

[0013] Preferably, a plurality of annular grooves are provided on the side surface of the rod body, and the plurality of annular grooves correspond one-to-one to the plurality of sealing rings, and the sealing rings are sleeved on the corresponding annular grooves.

[0014] Compared with the prior art, the advantages of the utility model are:

[0015] 1. By setting the fairing cover into a fixed first cover plate and a rotatable second cover plate, the first flow channel on the first cover plate corresponds to the second flow channel on the second cover plate, and the second flow channel can be controlled to communicate, intersect or stagger with the corresponding first flow channel through the driving component to adjust the size of the area of the first flow channel for the fluid to pass through, that is, it can be adjusted according to the actual use environment to be suitable for a clean fluid environment or a fluid environment containing particles or impurities, and has good applicability;

[0016] 2. The flow channel of the rectifying cover can be adjusted in real time by rotating the second cover plate and is controlled by the driving component, enabling the turbine flowmeter to flexibly respond under different fluid conditions. This dynamic adjustment ability is particularly suitable for working conditions that require frequent switching between different fluids or changing, which helps to reduce the maintenance and adjustment time of the equipment. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural view of the present utility model;

[0018] Figure 2 is a schematic cross-sectional structural view of the present utility model;

[0019] Figure 3 is an exploded structural view of the present utility model;

[0020] Figure 4 is a schematic structural view of the first cover plate in the present utility model;

[0021] Figure 5 is Figure 3 an enlarged view of part A in

[0022] In the figure: 1. Housing; 11. Through hole; 12. Step groove; 13. Mounting block; 131. Screw hole; 132. Bolt; 14. First perforation; 15. Second perforation; 16. Flange; 17. Mounting seat; 2. Meter core assembly; 21. Rectifying cover; 211. First cover plate; 2111. Central axis; 2112. First flow channel; 2113. Mounting hole; 2114. Card slot; 212. Second cover plate; 2121. Second flow channel; 22. Sleeve; 23. Front guiding fluid; 24. Support seat; 25. Impeller; 26. Rear guiding fluid; 27. Meter core mounting seat; 28. Rotating shaft; 29. Signal disc; 3. Driving component; 31. Oil cylinder; 32. Rod body; 321. Annular groove; 4. Sealing ring. Detailed Embodiment

[0023] The following further describes the present utility model in detail with reference to the embodiments of the drawings.

[0024] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0025] Embodiment 1: As Figures 1 to 3As shown, a turbine flowmeter comprises a housing 1 having a through hole 11 and a core assembly 2 arranged in the through hole 11, wherein the core assembly 2 comprises a fairing cover 21, a sleeve 22, a front guide fluid 23, a support seat 24, an impeller 25 and a rear guide fluid 26, wherein the fairing cover 21 is located at the input end of the through hole 11, and the fairing cover 21 comprises a first cover plate 211 and a second cover plate 212, wherein the edge of the first cover plate 211 is fixedly connected to the input end of the through hole 11, and the first cover plate 211 is provided with a central axis 2111 and a plurality of second cover plates 212. A flow channel 2112, the center of the second cover plate 212 is rotatably connected to the central axis 2111, a plurality of second flow channels 2121 are arranged on the second cover plate 212, and the plurality of second flow channels 2121 correspond to the plurality of first flow channels 2112 one by one, and a driving component 3 for controlling the rotation of the second cover plate 212 is arranged on the housing 1, and the second flow channel 2121 is controlled to communicate, intersect or stagger with the corresponding first flow channel 2112 by the driving component 3, so as to adjust the size of the area for the fluid to pass through the first flow channel 2112. Among them, the first cover plate 211 and the second cover plate 212 are both circular plates, the central axis 2111 is fixedly connected to the first cover plate 211, and a central hole is arranged on the second cover plate 212 to be sleeved on the central axis 2111.

[0026] In this embodiment, an annular step groove 12 is provided at the input end of the through hole 11 , the first cover plate 211 is fixedly connected to the step groove 12 , and the second cover plate 212 is located between the first cover plate 211 and the bottom of the step groove 12 .

[0027] Conventionally, the sleeve 22 is sleeved in the through hole 11, the leading fluid 23 is located in the sleeve 22 and is detachably connected to the central axis 2111, the support seat 24 is fixed to the outlet end of the sleeve 22, a movement mounting seat 27 is fixed in the support seat 24, a rotating shaft 28 is rotatably mounted on the movement mounting seat 27, the impeller 25 is located in the support seat 24 and fixed to the head of the rotating shaft 28, a signal transmitting disk 29 is fixed to the tail of the rotating shaft 28, and the rear fluid guide 26 is fixed to the end of the support seat 24.

[0028] Embodiment 2: Figure 3 and Figure 4 As shown, the rest of the parts are the same as those in the first embodiment, except that a plurality of mounting blocks 13 are fixedly provided at the bottom of the step groove 12, and the plurality of mounting blocks 13 are distributed around the outer periphery of the second cover plate 212, and screw holes 131 and bolts 132 are provided on the mounting blocks 13, and a plurality of mounting holes 2113 are provided on the first cover plate 211, and the plurality of mounting holes 2113 correspond to and are connected with the plurality of screw holes 131 one by one, and the bolts 132 pass through the mounting holes 2113 and are threadedly connected with the screw holes 131.

[0029] In this embodiment, one end of the first cover plate 211 facing the mounting block 13 is provided with a plurality of card slots 2114. An installation hole 2113 is provided at the bottom of the card slot 2114. The plurality of card slots 2114 correspond to the plurality of mounting blocks 13 one by one. The card slot 2114 covers the corresponding mounting block 13. The setting of the card slot 2114 facilitates the first cover plate 211 to be inserted into the stepped groove 12 at a specified angle, so that the installation hole 2113 is accurately aligned with the screw hole 131, which helps to improve the assembly efficiency. At the same time, it also helps to improve the connection stability between the first cover plate 211 and the mounting block 13.

[0030] Embodiment 3: As Figure 1 , Figure 3 and Figure 5 shown, the rest is the same as that in Embodiment 1. The difference is that the driving component 3 includes an oil cylinder 31 and a rod body 32. A first through hole 14 and a second through hole 15 which are located on the same straight line are provided on the side surface of the stepped groove 12. The first through hole 14 penetrates the outer side surface of the housing 1. The oil cylinder 31 is fixedly arranged on the outer side surface of the housing 1. One end of the rod body 32 is connected to the telescopic shaft of the oil cylinder 31. The other end of the rod body 32 passes through the first through hole 14 and the stepped groove 12 and then extends into the second through hole 15. A tooth portion (not shown in the figure) is provided on the side surface of the rod body 32. An external tooth ring (not shown in the figure) is provided on the side surface of the second cover plate 212. The tooth portion is meshed and connected with the external tooth ring. By driving the rod body 32 to expand and contract through the oil cylinder 31, the rotation angle of the second cover plate 212 can be accurately controlled, and the cooperation between the tooth portion and the external tooth ring can ensure a stable rotation process, so as to accurately adjust the flow channel size of the rectifying cover 21, thereby better controlling the flow path and flow rate of the fluid. At the same time, the oil cylinder 31 can be connected to the controller to realize automatic adjustment, without manual intervention, reducing the operation difficulty and time.

[0031] In this embodiment, a flange 16 for connecting with other components is integrally provided on the outer side surface of the housing 1. The first through hole 14 penetrates the flange 16. The oil cylinder 31 is arranged on the outer side surface of the flange 16. Further, in order to facilitate the stable and reliable connection of the oil cylinder 31, a mounting seat 17 is fixedly provided on the outer side surface of the flange 16. The oil cylinder 31 is fixedly arranged on the mounting seat 17.

[0032] In this embodiment, a plurality of sealing rings 4 are provided between the rod body 32 and the first through hole 14. Further, a plurality of annular grooves 321 are provided on the side surface of the rod body 32. The plurality of annular grooves 321 correspond to the plurality of sealing rings 4 one by one. The sealing ring 4 is sleeved at the corresponding annular groove 321. By providing the sealing ring 4, it can prevent the fluid from leaking out through the first through hole 14, and the reliability is better.

[0033] The present utility model has been described exemplarily in conjunction with the accompanying drawings. Obviously, the implementation of the present utility model is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or the concept and technical solution of the present utility model are directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A turbine flowmeter, comprising a housing (1) having a through hole (11) and a meter core assembly (2) disposed in the through hole (11), the meter core assembly (2) including a rectifying cover (21), a sleeve (22), a front guide fluid (23), a support seat (24), an impeller (25) and a rear guide fluid (26), the rectifying cover (21) being located at the input end of the through hole (11), characterized in that The rectifying cover (21) includes a first cover plate (211) and a second cover plate (212). The edge of the first cover plate (211) is fixedly connected to the input end of the through hole (11). A central shaft (2111) and a plurality of first flow channels (2112) are provided on the first cover plate (211). The center of the second cover plate (212) is rotatably connected to the central shaft (2111). A plurality of second flow channels (2121) are provided on the second cover plate (212). The plurality of second flow channels (2121) correspond to the plurality of first flow channels (2112) one by one. A driving assembly (3) for controlling the rotation of the second cover plate (212) is provided on the housing (1).

2. The turbine flowmeter according to claim 1, characterized in that An annular step groove (12) is provided at the input end of the through hole (11). The first cover plate (211) is fixedly connected to the step groove (12). The second cover plate (212) is located between the first cover plate (211) and the bottom of the step groove (12).

3. A turbine flowmeter according to claim 2, characterized in that A plurality of mounting blocks (13) are fixedly provided at the bottom of the step groove (12). A screw hole (131) and a bolt (132) are provided on the mounting block (13). A plurality of mounting holes (2113) are provided on the first cover plate (211). The plurality of mounting holes (2113) correspond to and communicate with the plurality of screw holes (131) one by one. The bolt (132) passes through the mounting hole (2113) and is threadedly connected to the screw hole (131).

4. A turbine flowmeter according to claim 3, characterized in that A plurality of clamping grooves (2114) are provided at one end of the first cover plate (211) facing the mounting block (13). The mounting holes (2113) are provided at the bottom of the clamping grooves (2114). The plurality of clamping grooves (2114) correspond to the plurality of mounting blocks (13) one by one. The clamping grooves (2114) cover the corresponding mounting blocks (13).

5. A turbine flowmeter according to claim 2, characterized in that The driving assembly (3) includes an oil cylinder (31) and a rod body (32). A first through hole (14) and a second through hole (15) which are located on the same straight line are provided on the side surface of the step groove (12). The first through hole (14) penetrates the outer side surface of the housing (1). The oil cylinder (31) is fixedly provided on the outer side surface of the housing (1). One end of the rod body (32) is connected to the telescopic shaft of the oil cylinder (31). The other end of the rod body (32) passes through the first through hole (14) and the step groove (12) and then extends into the second through hole (15). A tooth portion is provided on the side surface of the rod body (32). An external gear ring is provided on the side surface of the second cover plate (212). The tooth portion is meshed and connected with the external gear ring.

6. A turbine flowmeter according to claim 5, wherein A flange plate (16) is integrally provided on the outer side surface of the housing (1). The first through hole (14) penetrates the flange plate (16). The oil cylinder (31) is provided on the outer side surface of the flange plate (16).

7. A turbine flowmeter according to claim 6, characterized in that A mounting seat (17) is fixedly provided on the outer side surface of the flange plate (16). The oil cylinder (31) is fixedly provided on the mounting seat (17).

8. A turbine flowmeter according to claim 5, characterized in that A plurality of sealing rings (4) are arranged between the rod body (32) and the first through hole (14).

9. A turbine flowmeter according to claim 8, wherein A plurality of annular grooves (321) are arranged on the side surface of the rod body (32), and the plurality of annular grooves (321) correspond to the plurality of sealing rings (4) one by one. The sealing rings (4) are sleeved at the corresponding annular grooves (321).

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