CN219737536U

CN219737536U - Flow velocity and direction detection device for underwater fluid

Info

Publication number: CN219737536U
Application number: CN202321278508.9U
Authority: CN
Inventors: 顾晟; 张沧洪; 王旭东; 程龙; 王辉; 李威威
Original assignee: Three Gorges New Energy Offshore Wind Power Operation And Maintenance Jiangsu Co ltd
Current assignee: Three Gorges New Energy Offshore Wind Power Operation And Maintenance Jiangsu Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-09-22
Anticipated expiration: 2033-05-24

Abstract

The utility model relates to the technical field of flow velocity and direction detection, in particular to a flow velocity and direction detection device for underwater fluid. Comprises a connecting rod, a shell, an encoder and a flow rate sensing structure; the top end of the connecting rod is suitable for being fixedly connected with the underwater platform; the side surface of the shell is rotatably connected with the bottom end of the connecting rod, and a channel through which water can flow is arranged in the shell; the encoder rotates synchronously with the shell, is suitable for acquiring the rotation angle of the shell and is suitable for being in communication connection with the water platform; the flow rate sensing structure is fixed on the shell, is in communication connection with the encoder and is suitable for sensing the flow rate of water flow. The flow velocity and direction detection device for the underwater fluid has the advantages of high integration level, simple structure, easiness in installation and deployment and capability of realizing real-time monitoring of flow velocity and direction by only one-time installation.

Description

Flow velocity and direction detection device for underwater fluid

Technical Field

The utility model relates to the technical field of flow velocity and direction detection, in particular to a flow velocity and direction detection device for underwater fluid.

Background

The tidal current energy power station requires to install sensing equipment such as a flowmeter, a flow direction meter and the like near the underwater power generation device, realizes real-time monitoring of the flow speed and the flow direction of underwater fluid, and is used for supporting the normal operation of a power generation system.

The traditional flowmeter and the flow direction meter are two independent devices, and only single detection of the fluid flow speed or the fluid flow direction can be realized, and the flowmeter and the flow direction meter are required to be deployed and installed respectively, so that simultaneous measurement of the fluid flow speed and the fluid flow direction can be realized. In practical application, in order to avoid collision between flowmeter and flowmeter, need fix the two respectively in different positions, the space that the installation was accomplished after was great, and need constructor to carry out installation deployment many times, complex operation and inefficiency.

Disclosure of Invention

Therefore, the utility model aims to overcome the defects of large occupied space, complex operation and low efficiency of the flowmeter and the flowmeter in the prior art after the flowmeter and the flowmeter are installed, and further provides the device for detecting the flow velocity and the flow direction of the underwater fluid, which has high integration level, simple structure and easy installation and deployment, and can realize real-time monitoring of the flow velocity and the flow direction only by one time installation.

In order to solve the problems, the utility model provides a flow velocity and direction detection device of underwater fluid, which comprises a connecting rod, a shell, an encoder and a flow velocity sensing structure; the top end of the connecting rod is suitable for being fixedly connected with the underwater platform; the side surface of the shell is rotatably connected with the bottom end of the connecting rod, and a channel through which water can flow is arranged in the shell; the encoder rotates synchronously with the shell, is suitable for acquiring the rotation angle of the shell and is suitable for being in communication connection with the water platform; the flow rate sensing structure is fixed on the shell, is in communication connection with the encoder and is suitable for sensing the flow rate of water flow.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, which further comprises a bearing, wherein the bottom of the connecting rod is fixedly connected with the outer ring of the bearing, and the side surface of the shell is fixedly connected with the inner ring of the bearing.

According to the flow velocity and direction detection device for the underwater fluid, the encoder is fixedly connected to the inner ring of the bearing and rotates synchronously with the shell.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, which further comprises a first connecting hole and a communication line; the first connecting hole is formed in the shell and communicated with the inner ring of the bearing; one end of the communication line is electrically connected with the flow rate sensing structure, and the other end of the communication line penetrates through the first connecting hole to be electrically connected with the encoder.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, which further comprises a second connecting hole and a data line; the second connecting hole is arranged on the connecting rod and communicated with the inner ring of the bearing; one end of the data line is electrically connected with the encoder, and the other end of the data line passes through the second connecting hole and is electrically connected with the water platform.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, wherein a flow velocity sensing structure comprises a fixing piece, a transmission shaft, a propeller and an induction assembly; the fixing piece is fixedly connected to the inside of the shell; the transmission shaft is rotatably connected with the fixing piece and is parallel to the axial direction of the channel; the propeller is fixedly connected to one end of the transmission shaft and is suitable for rotating under the driving of water flow; the sensing assembly is connected with the transmission shaft and is suitable for sensing the flow speed of water flow.

According to the flow velocity and direction detection device for the underwater fluid, the shell is streamline in shape, one end of the shell is an inflow end, the other end of the shell is an outflow end, the diameter of the inflow end is smaller than that of the outflow end, the propeller is located at the inflow end, and water flow is suitable for flowing into a channel from the inflow end.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, wherein an induction component comprises a permanent magnet and a metal coil; the permanent magnet is fixedly connected to the other end of the transmission shaft and synchronously rotates with the propeller; the metal coil corresponds to the position of the permanent magnet, is fixed on the inner wall of the shell, and is suitable for inducing electromotive force.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, which also comprises a fixed groove and a sealing element; the fixed groove is arranged on the inner wall of the shell and corresponds to the position of the permanent magnet, the fixed groove is communicated with the first connecting hole, and the metal coil is positioned in the fixed groove; the sealing piece is positioned on the inner side of the shell and fixedly connected with the notch of the fixing groove, so that a sealing structure is formed on the inner side of the shell.

The utility model provides a flow velocity and flow direction detection device of underwater fluid, which further comprises two groups of first water flow baffles and second water flow baffles; the two groups of first water flow baffles are respectively positioned at two sides of the connecting rod, are arranged along the axial direction of the shell and are fixedly connected with the shell; the second water flow baffle is fixedly connected with the shell, and the second water flow baffle is arranged opposite to the first water flow baffle and is suitable for keeping the flow direction of the shell and the flow direction of the water flow consistent.

The utility model has the following advantages:

1. the utility model provides a flow velocity and flow direction detection device of underwater fluid, which comprises a connecting rod, a shell, an encoder and a flow velocity sensing structure, wherein the connecting rod is arranged on the shell; the top end of the connecting rod is suitable for being fixedly connected with the underwater platform; the side surface of the shell is rotatably connected with the bottom end of the connecting rod, and a channel through which water can flow is arranged in the shell; the encoder rotates synchronously with the shell, is suitable for acquiring the rotation angle of the shell and is suitable for being in communication connection with the water platform; the flow rate sensing structure is fixed on the shell, is in communication connection with the encoder and is suitable for sensing the flow rate of water flow.

The water flow enters the channel of the shell, and the flow speed of the water flow is measured through the flow speed sensing structure; meanwhile, the shell rotates along with the flow direction of water flow, the encoder synchronously rotates along with the shell, the flow direction of the water flow is recorded, and the simultaneous measurement of the flow speed and the flow direction of the water flow is realized. The flow velocity monitoring device and the flow direction detection device are integrated in the same device, the integrated level is high, the structure is simple, the installation and the deployment are easy, the simultaneous monitoring of the flow velocity and the flow direction of water flow can be realized only by one installation, and the occupied space after the installation is completed is small.

2. The utility model provides a flow velocity and flow direction detection device of underwater fluid, which further comprises a bearing, wherein the bottom of the connecting rod is fixedly connected with the outer ring of the bearing, and the side surface of the shell is fixedly connected with the inner ring of the bearing.

The shell and the connecting rod are connected through the bearing, so that friction can be reduced, power consumption is low, mechanical efficiency is high, the shell rotates more stably, free rotation of the shell is realized, the shell can rotate along with the flow direction of water flow conveniently, and measurement accuracy is improved; and the bearing is convenient to mount and dismount, convenient to maintain and long in service life.

3. According to the flow velocity and direction detection device for the underwater fluid, the shell is streamline in shape, one end of the shell is an inflow end, the other end of the shell is an outflow end, the diameter of the inflow end is smaller than that of the outflow end, the propeller is located at the inflow end, and water flow is suitable for flowing into a channel from the inflow end.

The streamlined outer shell enables the entire outer shell to reduce the fluid resistance as much as possible under water. Because the diameter of the inflow end is smaller than that of the outflow end, the shell can rotate along with the flow direction of water flow conveniently, the water flow direction can be effectively limited, the water flow flows into the channel from the inflow end, the forward impact force of the water flow on the propeller blades is enhanced, and the measurement data of the flow speed of the water flow is more accurate.

4. The utility model provides a flow velocity and flow direction detection device of underwater fluid, which also comprises a fixed groove and a sealing element; the fixed groove is arranged on the inner wall of the shell and corresponds to the position of the permanent magnet, the fixed groove is communicated with the first connecting hole, and the metal coil is positioned in the fixed groove; the sealing piece is positioned on the inner side of the shell and fixedly connected with the notch of the fixing groove, so that a sealing structure is formed on the inner side of the shell.

The fixed groove is communicated with the first connecting hole, so that the connection between the metal coil and the communication line is realized; and the notch of fixed slot is connected with the sealing member, under the effect of sealing member, guaranteed the leakproofness of this device overall structure, avoided the direct contact of metal coil, communication line, encoder or data line and sea water, avoided the corruption of sea water, prolonged the life of device, the reliability is higher, realized the velocity of flow and the long-time monitoring of flow direction to rivers, avoided conventional velocity of flow direction detection device because with sea water direct contact, fragile, need frequently carry the problem of overhauling to improve the usable hour number of tidal current energy machine set.

5. The utility model provides a flow velocity and flow direction detection device of underwater fluid, which further comprises two groups of first water flow baffles and second water flow baffles; the two groups of first water flow baffles are respectively positioned at two sides of the connecting rod, are arranged along the axial direction of the shell and are fixedly connected with the shell; the second water flow baffle is fixedly connected with the shell, and the second water flow baffle is arranged opposite to the first water flow baffle and is suitable for keeping the flow direction of the shell and the flow direction of the water flow consistent.

The second rivers baffle sets up with first rivers baffle relatively, along the axis symmetric distribution of casing, can further promote the stability of this device, avoid swaing or the problem of rolling because of the uneven fluid resistance of rivers leads to.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram showing the overall structure of a flow velocity and direction detection device for underwater fluid;

FIG. 2 shows a front view of a flow rate and direction detection device for subsea fluid;

FIG. 3 shows a cross-sectional view of a flow rate and direction detection device of an underwater fluid;

FIG. 4 shows a side view of a flow rate and direction detection device for subsea fluid;

fig. 5 shows a schematic diagram of the connection relationship of the flow rate sensing structure of the present utility model.

Reference numerals illustrate:

1. a connecting rod; 2. a housing; 21. an inflow end; 22. an outflow end; 3. a channel; 4. a bearing; 5. a second connection hole; 6. a data line; 7. a fixing member; 71. a first fixing rod; 72. a second fixing rod; 8. a transmission shaft; 9. a propeller; 10. a permanent magnet; 11. a metal coil; 12. a fixing groove; 13. a seal; 14. a first water flow baffle; 15. and a second water flow baffle.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

As shown in fig. 1 to 5, there is provided a flow velocity and direction detecting device for an underwater fluid in this embodiment, which includes a connecting rod 1, a housing 2, an encoder, and a flow velocity sensing structure; the top end of the connecting rod 1 is suitable for being fixedly connected with an underwater platform; the side surface of the shell 2 is rotatably connected with the bottom end of the connecting rod 1, and a channel 3 through which water can pass is arranged in the shell; the encoder rotates synchronously with the shell 2, is suitable for acquiring the rotation angle of the shell 2 and is suitable for being in communication connection with a water platform; the flow rate sensing structure is fixed on the shell 2, is in communication connection with the encoder and is suitable for sensing the flow rate of water flow.

The water flow enters the channel 3 of the shell 2, and the flow speed of the water flow is measured through the flow speed sensing structure; meanwhile, the shell 2 rotates along with the flow direction of water flow, the encoder synchronously rotates along with the shell 2, the flow direction of water flow is recorded, and the simultaneous measurement of the flow speed and the flow direction of water flow is realized. The flow velocity monitoring device and the flow direction detection device are integrated in the same device, the integrated level is high, the structure is simple, the installation and the deployment are easy, the simultaneous monitoring of the flow velocity and the flow direction of water flow can be realized only by one installation, and the occupied space after the installation is completed is small.

Specifically, through holes are formed in two sides of the top end of the connecting rod 1, and the connecting piece sequentially penetrates through the two through holes to fix the connecting rod 1 on the underwater platform. The connecting piece can be a cross rod or a rope and other structures.

The flow velocity and direction detection device of the underwater fluid in the embodiment further comprises a bearing 4, the bottom of the connecting rod 1 is fixedly connected with the outer ring of the bearing 4, and the side face of the shell 2 is fixedly connected with the inner ring of the bearing 4.

The shell 2 and the connecting rod 1 are connected through the bearing 4, so that friction can be reduced, power consumption is low, mechanical efficiency is high, the rotation of the shell 2 is smoother, free rotation of the shell 2 is realized, the shell 2 can rotate along with the flow direction of water flow conveniently, and measurement accuracy is improved; and the bearing 4 is convenient to mount and dismount, convenient to maintain and long in service life.

In the flow velocity and flow direction detection device of the underwater fluid in the embodiment, the encoder is fixedly connected with the inner ring of the bearing 4 and synchronously rotates with the shell 2, so that the encoder can record the rotation angle of the shell 2 conveniently.

The flow velocity and flow direction detection device of the underwater fluid in the embodiment further comprises a first connecting hole and a communication line; the first connecting hole is arranged on the shell 2 and communicated with the inner ring of the bearing 4; one end of the communication line is electrically connected with the flow rate sensing structure, and the other end of the communication line penetrates through the first connecting hole to be electrically connected with the encoder.

The flow velocity and flow direction detection device of the underwater fluid in the embodiment further comprises a second connecting hole 5 and a data wire 6; the second connecting hole 5 is arranged on the connecting rod 1 and communicated with the inner ring of the bearing 4; one end of the data line 6 is electrically connected with the encoder, and the other end of the data line passes through the second connecting hole 5 and is electrically connected with the water platform.

The communication line transmits the flow rate data of the water flow measured by the flow rate sensing structure to the encoder, and the data line 6 can transmit the rotation angle of the shell 2 recorded by the encoder and the flow rate data of the water flow to the water platform.

The first connecting hole, the inner ring of the bearing 4 and the second connecting hole 5 are all communicated, and the communication line, the encoder and the data line 6 are all positioned in the device, so that the situation that the communication line, the encoder and the data line are exposed outside and corroded by seawater to influence the service life is avoided.

The flow velocity and direction detection device of the underwater fluid in the embodiment, wherein the flow velocity sensing structure comprises a fixing piece 7, a transmission shaft 8, a propeller 9 and a sensing assembly; the fixing piece 7 is fixedly connected to the inside of the shell 2; the transmission shaft 8 is rotatably connected with the fixing piece 7 and is parallel to the axial direction of the channel 3; the propeller 9 is fixedly connected to one end of the transmission shaft 8 and is suitable for rotating under the driving of water flow; the sensing assembly is connected with the transmission shaft 8 and is suitable for sensing the flow velocity of water flow.

The relative speed can be produced to rivers and screw 9 to rivers will drive screw 9 and rotate, will rotate the coaxial transmission of rotational speed simultaneously and give transmission shaft 8, the rotational speed of screw 9 is bigger the faster the water velocity, and the rotational speed of screw 9 is less the slower the water velocity, and transmission shaft 8 is with the synchronous transmission of rotational speed of screw 9 for the response subassembly, and then makes the response subassembly realize the response measurement to water velocity to the response subassembly is with the data transmission that obtains for the encoder through the communication line, and then passes through data line 6 with data transmission water upper platform by the encoder, thereby realizes the real-time measurement to the velocity of flow of rivers.

In the flow velocity and direction detection device of the underwater fluid in this embodiment, the housing 2 is streamlined, one end is an inflow end 21, the other end is an outflow end 22, the diameter of the inflow end 21 is smaller than that of the outflow end 22, the propeller 9 is located at the inflow end 21, and the water flow is suitable for flowing into the channel 3 from the inflow end 21.

The streamlined outer shell enables the entire outer shell 2 to reduce the fluid resistance as much as possible under water. Because the diameter of the inflow end 21 is smaller than that of the outflow end 22, the shell 2 can rotate along with the flow direction of water flow conveniently, the water flow direction can be effectively limited, the water flow flows into the channel 3 from the inflow end 21, the forward impact force of the water flow on the blades of the propeller 9 is enhanced, and the measurement data of the flow speed of the water flow is more accurate.

The flow velocity and direction detection device of the underwater fluid in the embodiment, the induction component comprises a permanent magnet 10 and a metal coil 11; the permanent magnet 10 is fixedly connected to the other end of the transmission shaft 8 and rotates synchronously with the propeller 9; the metal coil 11 is fixed on the inner wall of the housing 2 corresponding to the position of the permanent magnet 10, and is suitable for inducing electromotive force.

The permanent magnet 10 rotates synchronously with the propeller 9 under the drive of the transmission shaft 8, the metal coil 11 induces electromotive force according to the law of electromagnetic induction when the permanent magnet 10 rotates, meanwhile, data are transmitted to the encoder through a communication wire connected with the metal coil 11, and finally, the encoder transmits recorded data to the water platform through the data wire 6.

The flow velocity and flow direction detection device of the underwater fluid in the embodiment further comprises a fixed groove 12 and a sealing element 13; a fixing groove 12 is formed in the inner wall of the housing 2, and is communicated with the first connecting hole corresponding to the position of the permanent magnet 10, and the metal coil 11 is positioned in the fixing groove 12; the sealing element 13 is positioned on the inner side of the shell 2 and fixedly connected with the notch of the fixed groove 12, so that a sealing structure is formed on the inner side of the shell 2.

The fixed groove 12 is communicated with the first connecting hole, so that the connection between the metal coil 11 and the communication line is realized; and the notch of fixed slot 12 is connected with sealing member 13 to under the effect of sealing member 13, guaranteed the leakproofness of this device overall structure, avoided the direct contact of metal coil 11, communication line, encoder or data line 6 and sea water, avoided the corruption of sea water, prolonged the life of device, the reliability is higher, realized the long-time monitoring to the velocity of flow and the flow direction of rivers, avoided conventional velocity of flow direction detection device because with sea water direct contact, fragile, need frequently carry the problem that the surface of water overhauld, thereby improve the usable hour number of trend energy unit.

The flow velocity and direction detection device of the underwater fluid in the embodiment further comprises two groups of first water flow baffles 14 and second water flow baffles 15; two groups of first water flow baffles 14 are respectively positioned at two sides of the connecting rod 1, are arranged along the axial direction of the shell 2 and are fixedly connected with the shell 2; the second water flow baffle 15 is fixedly connected with the housing 2, and the second water flow baffle 15 is opposite to the first water flow baffle 14, so that the housing 2 is suitable for keeping the flow direction of the water flow consistent.

The second rivers baffle 15 sets up with first rivers baffle 14 relatively, along the axis symmetric distribution of casing 2, can further promote the stability of this device, avoid swaing or the problem of rolling because of the uneven fluid resistance of rivers leads to.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A flow rate and direction detection device for an underwater fluid, comprising:

the top end of the connecting rod (1) is suitable for being fixedly connected with the underwater platform;

the side surface of the shell (2) is rotatably connected with the bottom end of the connecting rod (1), and a channel (3) through which water can flow is arranged in the shell;

the encoder rotates synchronously with the shell (2), is suitable for acquiring the rotation angle of the shell (2), and is suitable for being in communication connection with a water platform;

the flow rate sensing structure is fixed on the shell (2), is in communication connection with the encoder and is suitable for sensing the flow rate of water flow.

2. The underwater fluid flow velocity and direction detection device according to claim 1, further comprising a bearing (4), wherein the bottom of the connecting rod (1) is fixedly connected with an outer ring of the bearing (4), and the side surface of the housing (2) is fixedly connected with an inner ring of the bearing (4).

3. The device for detecting the flow velocity and direction of the underwater fluid according to claim 2, wherein the encoder is fixedly connected to the inner ring of the bearing (4) and rotates in synchronization with the housing (2).

4. A flow rate and direction detection device for an underwater fluid according to claim 3, further comprising:

the first connecting hole is arranged on the shell (2) and communicated with the inner ring of the bearing (4);

and one end of the communication line is electrically connected with the flow speed sensing structure, and the other end of the communication line passes through the first connecting hole and is electrically connected with the encoder.

5. A flow rate and direction detection device for an underwater fluid according to claim 3, further comprising:

the second connecting hole (5) is arranged on the connecting rod (1) and is communicated with the inner ring of the bearing (4);

and one end of the data wire (6) is electrically connected with the encoder, and the other end of the data wire passes through the second connecting hole (5) and is electrically connected with the water platform.

6. The apparatus according to claim 4, wherein the flow rate sensing structure comprises:

the fixing piece (7) is fixedly connected inside the shell (2);

a transmission shaft (8) rotatably connected to the fixing member (7) and parallel to the axial direction of the passage (3);

the propeller (9) is fixedly connected to one end of the transmission shaft (8) and is suitable for rotating under the driving of water flow;

the sensing assembly is connected with the transmission shaft (8) and is suitable for sensing the flow speed of water flow.

7. The device according to claim 6, characterized in that the housing (2) is streamlined in shape, with an inflow end (21) at one end and an outflow end (22) at the other end, and in that the inflow end (21) has a smaller diameter than the outflow end (22), the propeller (9) being located at the inflow end (21), and the water flow being adapted to flow from the inflow end (21) into the channel (3).

8. The subsea fluid flow direction sensing apparatus of claim 6, wherein the sensing assembly comprises:

the permanent magnet (10) is fixedly connected to the other end of the transmission shaft (8) and synchronously rotates with the propeller (9);

and the metal coil (11) is fixed on the inner wall of the shell (2) corresponding to the position of the permanent magnet (10) and is suitable for inducing electromotive force.

9. The underwater fluid flow rate and direction detection device of claim 8, further comprising:

the fixing groove (12) is arranged on the inner wall of the shell (2) and corresponds to the position of the permanent magnet (10), the fixing groove is communicated with the first connecting hole, and the metal coil (11) is positioned in the fixing groove (12);

and the sealing piece (13) is positioned on the inner side of the shell (2) and fixedly connected with the notch of the fixing groove (12), so that a sealing structure is formed on the inner side of the shell (2).

10. The underwater fluid flow rate and direction detection apparatus as claimed in any one of claims 1 to 9, further comprising:

two groups of first water flow baffles (14) are respectively positioned at two sides of the connecting rod (1) and are arranged along the axial direction of the shell (2) and fixedly connected with the shell (2);

the second water flow baffle (15) is fixedly connected with the shell (2), and the second water flow baffle (15) is arranged opposite to the first water flow baffle (14) and is suitable for keeping the flow direction of the shell (2) and the flow direction of water flow consistent.