Hydrological truss suspension rod flow measuring vehicle

Abstract

The utility model discloses a hydrological truss suspension rod flow measuring vehicle, and relates to the technical field of water flow velocity measurement. The utility model provides a hydrological truss suspension rod flow measuring vehicle which comprises a moving part capable of moving above a target water area. The suspension rod is arranged on the moving part, and a flow measuring instrument is arranged at the end part of the suspension rod; the moving part is provided with a driving assembly used for driving the suspension rod to move in the first direction. The technical problem that in the prior art, a flow measuring instrument is fixed in an auxiliary mode through a mooring rope and a fish lead, and when a flow measuring point needs to be replaced, the flow measuring instrument is inconvenient to move is solved.

Description

Technical Field

[0001] The present application relates to the technical field of water flow velocity measurement, and particularly to a hydrological truss suspended rod flow measurement vehicle. Background Art

[0002] Currently, when measuring the flow of rivers, lakes, reservoirs, etc., a flow measurement instrument is usually fixed on a cable, and a lead fish with a counterweight is arranged at the end of the cable. The gravity of the lead fish plays an auxiliary fixing role for the flow measurement instrument. However, when it is necessary to change the flow measurement point, it is inconvenient to move the flow measurement instrument. During flow measurement, the whole of the flow measurement instrument and the lead fish may swing with the water flow, affecting the measurement accuracy of the flow measurement instrument. Content of the Utility Model

[0003] The main purpose of the present application is to provide a hydrological truss suspended rod flow measurement vehicle, aiming to solve the technical problem that when the flow measurement instrument in the prior art is assisted and fixed by a cable and a lead fish, it is inconvenient to move the flow measurement instrument when it is necessary to change the flow measurement point.

[0004] To achieve the above purpose, the present application provides a hydrological truss suspended rod flow measurement vehicle, including a moving member that can move above the target water area;

[0005] A suspended rod is arranged on the moving member, and a flow measurement instrument is arranged at the end of the suspended rod;

[0006] Wherein, a driving component for driving the suspended rod to move in the first direction is arranged on the moving member.

[0007] Optionally, a guiding cylinder is arranged on the moving member, the guiding cylinder has a guiding hole extending in the first direction, and the suspended rod penetrates through the guiding hole;

[0008] The driving component includes a first rack, a first driving wheel and a first motor; the first rack is arranged on the outer wall of the suspended rod, the first motor is arranged on the moving member, at least part of the driving shaft of the first motor is located in the guiding hole, and the first driving wheel is sleeved on the driving shaft of the first motor and meshes with the first rack.

[0009] Optionally, at least two limiting components are arranged along the extending direction of the guiding hole, the limiting component includes two rollers with parallel axes, a limiting space is formed between the two rollers, the suspended rod penetrates through the limiting space, and the opposite side walls of the suspended rod are respectively in contact with the two rollers.

[0010] Optionally, it further includes a truss body. A moving wheel capable of moving along the truss body is provided on the moving member. A second rack extending in the second direction is provided on the truss body. A second motor is provided on the moving member. A second driving wheel meshing with the second rack is connected to the output shaft of the second motor.

[0011] Optionally, the moving member includes a bottom plate and a top plate. A support member is provided between the bottom plate and the top plate. One end of the support member is hinged to the top plate and the other end is a free end. The free end provides a supporting force for the second motor. An elastic component is provided between the free end and the top plate to maintain the meshing state of the second driving wheel and the second rack.

[0012] Optionally, a fixing plate is provided at the free end. A speed reducer is provided on the fixing plate. The second motor is provided on the fixing plate. The output shaft of the second motor is connected to the input shaft of the speed reducer. A transmission wheel is sleeved on the output shaft of the speed reducer. The second driving wheel is rotatably provided on the speed reducer. The transmission wheel meshes with the second driving wheel.

[0013] Optionally, the elastic component includes a positioning cylinder, a positioning rod and a positioning spring;

[0014] One end of the positioning cylinder is hinged to the top plate and the other end has a positioning hole. One end of the positioning rod is hinged to the bottom plate and the other end is matched with the positioning hole. The positioning spring is sleeved outside the positioning cylinder and the positioning rod.

[0015] Optionally, a baffle is in threaded cooperation with the outer wall of the positioning cylinder. The positioning spring is located between the free end and the baffle to adjust the compression degree of the positioning spring by adjusting the position of the baffle on the positioning cylinder.

[0016] Optionally, there are two chutes on the truss body that open back to back in the third direction. The chutes extend in the second direction. At least two connecting members are provided on the moving member. At least two of the connecting members are connected with pulleys respectively cooperating with the two chutes.

[0017] Optionally, the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0018] The beneficial effects that can be achieved by this application:

[0019] A hydrological truss suspension rod flow measurement vehicle proposed in an embodiment of the present application is provided with a suspension rod on a moving member, and a flow meter is arranged at the lower end of the suspension rod. By setting a driving assembly, it is convenient to control the flow meter to descend to different heights to measure information such as the flow velocity of the target water area. The suspension rod is made of a rigid material. Compared with connecting the speedometer through a cable, when the flow meter is controlled by the moving member and the driving assembly to move to different positions for measurement, the flow meter will not sway with the waves following the water flow, and the flow meter can be more accurately fixed at the target position for measurement, improving the measurement accuracy of the flow meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of the flow measurement vehicle according to an embodiment of the present application;

[0021] Figure 2 is a partial schematic diagram for facilitating the observation of the internal structure of the guiding cylinder according to an embodiment of the present application;

[0022] Figure 3 is a schematic structural diagram of the first perspective of the moving member according to an embodiment of the present application;

[0023] Figure 4 is a schematic structural diagram of the second perspective of the moving member according to an embodiment of the present application;

[0024] Reference numerals in the figures: 10 - moving member, 11 - top plate, 12 - bottom plate, 20 - suspension rod, 21 - driving assembly, 211 - first motor, 212 - first driving wheel, 213 - first rack, 22 - limiting assembly, 221 - roller, 23 - guiding cylinder, 231 - guiding hole, 30 - truss body, 31 - second rack, 32 - sliding groove, 321 - pulley, 322 - connecting member, 40 - second motor, 41 - reducer, 42 - transmission wheel, 43 - second driving wheel, 44 - fixing plate, 50 - supporting member, 51 - free end, 60 - elastic assembly, 61 - positioning cylinder, 62 - baffle, 63 - positioning spring, 64 - positioning rod.

[0025] The realization, functional features and advantages of the purpose of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or the solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0030] Embodiment 1

[0031] Referring to Figures 1-4 , Figure 1 and Figure 2 in which X represents the first direction, Y represents the second direction, and Z represents the third direction. The first embodiment of the present application provides a hydrological truss suspension rod flow measurement vehicle, including a moving member 10 and a suspension rod 20. The moving member 10 can move above the target water area; the suspension rod 20 is arranged on the moving member 10, and a flow meter (not shown in the figure) is arranged at the end of the suspension rod 20; wherein, a driving assembly 21 for driving the suspension rod 20 to move in the first direction is arranged on the moving member 10.

[0032] In this embodiment, the moving member 10 can move above the target water area, and the moving member 10 can also move on the water surface of the target water area. The moving member 10 moves on a horizontal plane, and the suspension rod 20 moves in the vertical direction. The current meter is arranged at the lower end of the suspension rod 20, and the current meter can also be replaced according to the user's usage requirements to obtain different hydrological information. The current meter can be detachably installed at the lower end of the suspension rod 20 by means of a bolt assembly. When it is necessary to control the current meter to move to a target point for measurement, when there are obstacles such as waterweeds and dead trees on the moving path of the current meter from the initial position to the target position, the suspension rod 20 can be driven to move upward by the driving assembly 21 first, and then the moving member 10 can be moved on the horizontal plane to cross the obstacles in the water. When there are no obstacles on the moving path of the current meter from the initial position to the target position, the moving member 10 can be directly driven to move in the horizontal plane direction. Compared with the prior art in which the current meter is suspended by a cable and a lead fish is connected to the end of the cable to play a role of counterweight and assist in fixing the current meter. However, when the current meter is suspended by a cable, when it is necessary to measure at the initial position, the cable direction can be adjusted by means of a winch, etc., and the current meter and the lead fish suspended at the lower end of the cable can be moved downward to the initial position for measurement; when the current meter needs to move from the initial position to the target position, when the upper end of the cable moves to the target position, the lower end of the cable will not immediately move to the target position synchronously with the upper end of the cable, and the lower end of the cable will be delayed in moving to the target position. At this time, the cable is in an inclined state, and the inclination degree of the cable may be related to the flow velocity of the river and the depth of the lead fish in the water, which is not convenient to judge the position of the current meter according to the position of the upper end of the cable, not convenient to control the position of the current meter, and not convenient to make the current meter accurately reach the target position. By fixing the current meter by means of the suspension rod 20, when the moving member 10 moves a preset distance horizontally, the whole of the suspension rod 20 and the current meter also move a preset distance differently, which is convenient to determine the relative position of the current meter by controlling the moving distance of the moving member 10 and convenient to control the current meter to reach the target position. And compared with the prior art, when the current meter and the lead fish are fixed by a cable, if the moving speed from the initial position to the target position is too fast, the current meter will not stop immediately at the target position, but will move forward a certain distance under the action of inertia, and the current meter may swing back and forth; however, when the current meter is fixed by means of the suspension rod 20, when the moving member 10 stops above the target position, the current meter can immediately stop at the target position and will not shake randomly, enabling the moving member 10 to quickly move to the target position.

[0033] Embodiment 2

[0034] As an alternative embodiment, referring to Figure 1 and Figure 2, this embodiment provides a specific moving method for the suspension rod 20, including: the moving member 10 is provided with a guiding cylinder 23, the guiding cylinder 23 has a guiding hole 231 extending along a first direction, and the suspension rod 20 penetrates through the guiding hole 231; the driving assembly 21 includes a first rack 213, a first driving wheel 212 and a first motor 211; the first rack 213 is arranged on the outer wall of the suspension rod 20, the first motor 211 is arranged on the moving member 10, at least part of the driving shaft of the first motor 211 is located in the guiding hole 231, and the first driving wheel 212 is sleeved on the driving shaft of the first motor 211 and meshes with the first rack 213.

[0035] Optionally, at least two limiting components 22 are arranged along the extending direction of the guiding hole 231. The limiting component 22 includes two rollers 221 with parallel axes. A limiting space is formed between the two rollers 221, the suspension rod 20 penetrates through the limiting space, and the opposite side walls of the suspension rod 20 are respectively abutted against the two rollers 221.

[0036] In this embodiment, the guiding cylinder 23 is arranged on the side wall of the moving member 10 along the first direction, and the outer wall of the guiding cylinder 23 can be fixed to the moving member 10 by welding or bolt connection. The first motor 211 is fixed on the moving member 10. Figure 1 A protective shell is arranged around the first motor 211. Figure 2 The protective shell is removed to facilitate observing the position of the first motor 211. At least part of the output shaft of the first motor 211 is located in the guiding hole 231, and the first driving wheel 212 is sleeved on the part of the output shaft of the first motor 211 located in the guiding hole 231. The suspension rod 20 penetrates through the guiding hole 231 along the first direction, the first rack 213 extends along the first direction, the first rack 213 is arranged on the outer wall of the suspension rod 20, and the first rack 213 is always meshed with the first driving wheel 212 on the first motor 211. When the first motor 211 works, the output shaft of the first motor 211 rotates, and the first driving wheel 212 drives the first rack 213 to move along the first direction. When the first motor 211 stops working, the first rack 213 and the guiding cylinder 23 are relatively fixed. The cross-sectional shape of the guiding cylinder 23 can be circular or square.

[0037] By arranging at least two limiting components 22 in the guiding hole 231 of the guiding cylinder 23, all the limiting components 22 are arranged and distributed along the extending direction of the guiding hole 231. The limiting component 22 is also provided with a fixing frame for supporting the two rollers 221. The two rollers 221 are respectively located on both sides of the suspension rod 20, and the rollers 221 are abutted against the suspension rod 20. The friction between the two rollers 221 and the suspension rod 20 is increased to support the suspension rod 20; the rollers 221 have a clamping groove adapted to the width of the suspension rod 20, and the suspension rod 20 is limited and guided through the clamping groove.

[0038] It should be noted that the above is one of the ways to drive the lifting and moving of the suspension rod 20. Now, another driving method is provided: a hydraulic cylinder or a pneumatic cylinder is provided at the lower end of the moving member 10, the telescopic end of the hydraulic cylinder or the pneumatic cylinder is connected to the upper end of the suspension rod 20, and a flowmeter is provided at the lower end of the suspension rod 20.

[0039] Embodiment 3

[0040] As an alternative implementation, referring to Figures 1-4 , this embodiment provides a specific structure for driving the movement of the moving member 10, including: further including a truss body 30, moving wheels capable of moving along the truss body 30 are provided on the moving member 10, a second rack 31 extending in the second direction is provided on the truss body 30, a second motor 40 is provided on the moving member 10, and a second driving wheel 43 meshing with the second rack 31 is connected to the output shaft of the second motor 40.

[0041] In this embodiment, the truss body 30 is erected above the target water area. For example, the truss can span a river. The upper end of the truss body 30 has a plane for the moving wheels to move. At least two rotating shafts are provided on the moving member 10, a moving wheel is provided at each end of the rotating shaft, a bearing seat is provided on the moving member 10, a bearing body is provided on the bearing seat, the rotating shaft passes through the bearing body, and the bearing seat and the bearing body play a limiting role on the rotating shaft, enabling the rotating shaft to rotate around its own axis. When the second motor 40 works, the second driving wheel 43 meshes with the second rack 31, driving the moving member 10 to move along the extending direction of the second rack 31.

[0042] It should be noted that the above is one of the ways to drive the movement of the moving member 10. Now, another driving method for driving the moving member 10 is provided: a winch is provided at each end of the truss body 30, a pulling rope is provided on the winch, and the end of the pulling rope is connected to the truss body 30. By operating the winches on both sides, the movement of the moving member 10 on the cross-river body is controlled. Similarly, hydraulic cylinders or pneumatic cylinders can also be provided at both ends of the truss body 30 to control the movement of the moving member 10 along the truss pump body in the second direction.

[0043] Embodiment 4

[0044] As an alternative implementation, referring to Figure 3 and Figure 4 , this embodiment provides a specific structure of the moving member 10, including: the moving member 10 includes a bottom plate 12 and a top plate 11, a support member 50 is provided between the bottom plate 12 and the top plate 11, one end of the support member 50 is hinged to the top plate 11, the other end is a free end 51, the free end 51 provides a supporting force for the second motor 40, and an elastic component 60 is provided between the free end 51 and the top plate 11 to maintain the meshing state of the second driving wheel 43 and the second rack 31.

[0045] Optionally, a fixing plate 44 is provided at the free end 51. A speed reducer 41 is provided on the fixing plate 44. The second motor 40 is provided on the fixing plate 44. The output shaft of the second motor 40 is connected to the input shaft of the speed reducer 41. A transmission wheel 42 is sleeved on the output shaft of the speed reducer 41. The second driving wheel 43 is rotatably provided on the speed reducer 41. The transmission wheel 42 meshes with the second driving wheel 43.

[0046] In this embodiment, the moving member 10 includes a top plate 11 and a bottom plate 12. The top plate 11 and the bottom plate 12 are connected by a connecting plate to keep the distance between the bottom plate 12 and the top plate 11 from changing randomly. By providing a support member 50 between the bottom plate 12 and the top plate 11, the hinged end of the support member 50 is hinged to the top plate 11, and the free end 51 of the support plate can move around the hinged end. By providing an elastic component 60, the second motor 40 always has a tendency to approach the bottom plate 12, that is, the second driving wheel 43 has a tendency to approach the second rack 31, ensuring that the second driving wheel 43 meshes with the second rack 31. When the second motor 40 works, the second driving wheel 43 and the second rack 31 cooperate to realize the movement of the moving member 10. By providing a speed reducer 41, a fixing plate 44 and a transmission wheel 42, both the speed reducer 41 and the second motor 40 are provided on the fixing plate 44, and the fixing plate 44 is provided at the movable end of the support member 50, improving the rotational stability of the second driving wheel 43.

[0047] Embodiment 5

[0048] As an alternative implementation manner, referring to Figure 3 As shown, this embodiment provides a specific structure of an elastic component 60, including: the elastic component 60 includes a positioning cylinder 61, a positioning rod 64 and a positioning spring 63; one end of the positioning cylinder 61 is hinged to the top plate 11 and the other end has a positioning hole, one end of the positioning rod 64 is hinged to the bottom plate 12 and the other end is matched with the positioning hole, and the positioning spring 63 is sleeved outside the positioning cylinder 61 and the positioning rod 64.

[0049] Optionally, a baffle 62 is in threaded fit with the outer wall of the positioning cylinder 61. The positioning spring 63 is located between the free end 51 and the baffle 62 to adjust the compression degree of the positioning spring 63 by adjusting the position of the baffle 62 on the positioning cylinder 61.

[0050] In this embodiment, the upper end of the positioning cylinder 61 is hinged to the top plate 11, the lower end of the positioning cylinder 61 is a movable end, the lower end of the positioning rod 64 is hinged to the bottom plate 12, and the upper end of the positioning rod 64 is a movable end. A positioning hole matching the positioning rod 64 is provided at the movable end of the positioning cylinder 61, and the movable end of the positioning rod 64 extends into the positioning hole. Relative movement can occur between the positioning rod 64 and the positioning cylinder 61. By providing external threads on the outer wall of the positioning cylinder 61 and providing a through hole in the middle of the baffle 62, internal threads matching the external threads are provided on the inner wall of the through hole. By rotating the baffle 62, the relative position of the baffle 62 on the positioning cylinder 61 can be adjusted. The baffle 62 plays a limiting role on the upper end of the positioning spring 63, that is, by adjusting the relative position of the baffle 62, the compression degree of the positioning spring 63 can be adjusted, and further the thrust magnitude of the free end 51 of the support member 50 can be adjusted to ensure that the second driving wheel 43 can always mesh with the second rack 31, reducing the situation that after the second driving wheel 43 disengages from the second rack 31, the second motor 40 cannot drive the moving member 10 to move when it works.

[0051] Embodiment 6

[0052] As an alternative embodiment, referring to Figures 1-4 shown, this embodiment provides a specific structure of the truss body 30, including: there are two chutes 32 on the truss body 30 that open away from each other in the third direction, the chutes 32 extend in the second direction, at least two connecting members 322 are provided on the moving member 10, and at least two connecting members 322 are connected with pulleys 321 respectively matching the two chutes 32.

[0053] Optionally, the first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0054] In this embodiment, by providing the chutes 32 at both ends of the truss body 30 in the third direction, the opening directions of the two chutes 32 are opposite, providing the connecting members 322 on the moving member 10, and providing the pulleys 321 for matching the chutes 32 on the connecting members 322, through the cooperation of the two chutes 32 and the pulleys 321, the limiting effect of the moving member 10 in the third direction is realized, avoiding the random deviation of the moving member 10 in the third direction. The height of the pulley 321 is adapted to the height of the chute 32, and the chute 32 plays a limiting role on the pulley 321 in the first direction, reducing the situation that the moving member 10 moves randomly in the first direction. The chute 32 moves in the second direction. By providing the connecting members 322 and the pulleys 321, the moving member 10 moves more smoothly and smoothly in the second direction. Figure 4 The two connecting members 322 and pulleys 321 at the front end in are hidden for observing the internal structure of the moving member 10.

[0055] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A hydrological truss cantilever flow measuring vehicle, characterized in that: include: A moving part capable of moving above a target water area; A suspension rod is arranged on the moving part, and a flow meter is arranged at the end of the suspension rod; Wherein, the moving member is provided with a driving component for driving the suspension rod to move along the first direction.

2. The hydrological truss cantilever flow measuring vehicle according to claim 1, characterized in that: The moving member is provided with a guide cylinder, the guide cylinder has a guide hole extending along the first direction, and the suspension rod passes through the guide hole; The driving assembly includes a first rack, a first driving wheel and a first motor; the first rack is arranged on the outer wall of the suspension rod, the first motor is arranged on the moving part, the driving shaft of the first motor is at least partially located in the guide hole, and the first driving wheel is sleeved on the driving shaft of the first motor and meshes with the first rack.

3. The hydrological truss cantilever flow measuring vehicle according to claim 2, characterized in that: The guide hole is provided with at least two limit assemblies along its extension direction. The limit assemblies include two rollers whose axes are parallel to each other. A limit space is formed between the two rollers. The suspension rod passes through the limit space. The opposite side walls of the suspension rod are respectively in contact with the two rollers.

4. The hydrological truss cantilever flow measuring vehicle according to claim 1, characterized in that: It also includes a truss body, the moving member is provided with a moving wheel capable of moving along the truss body, the truss body is provided with a second rack extending along a second direction, the moving member is provided with a second motor, and the output shaft of the second motor is connected to a second driving wheel meshing with the second rack.

5. The hydrological truss cantilever flow measuring vehicle according to claim 4, characterized in that: The moving part includes a bottom plate and a top plate, a supporting part is arranged between the bottom plate and the top plate, one end of the supporting part is hinged to the top plate, and the other end is a free end, the free end provides supporting force for the second motor, and an elastic component is arranged between the free end and the top plate to maintain the second driving wheel in a state of meshing with the second rack.

6. The hydrological truss cantilever current measuring vehicle according to claim 5, characterized in that: The free end is provided with a fixing plate, the fixing plate is provided with a reducer, the second motor is provided on the fixing plate, the output shaft of the second motor is connected with the input shaft of the reducer, the output shaft sleeve of the reducer is provided with a transmission wheel, the second driving wheel is rotatably provided on the reducer, and the transmission wheel is meshed with the second driving wheel.

7. The hydrological truss cantilever flow measuring vehicle according to claim 5, characterized in that: The elastic component includes a positioning cylinder, a positioning rod and a positioning spring; One end of the positioning tube is hinged to the top plate and the other end has a positioning hole. One end of the positioning rod is hinged to the bottom plate and the other end cooperates with the positioning hole. The positioning spring is sleeved outside the positioning tube and the positioning rod.

8. The hydrological truss cantilever current measuring vehicle according to claim 7, characterized in that: The outer wall of the positioning tube is threadedly matched with a baffle, and the positioning spring is located between the free end and the baffle, so that the compression degree of the positioning spring can be adjusted by adjusting the position of the baffle on the positioning tube.

9. The hydrological truss cantilever flow measuring vehicle according to claim 4, characterized in that: The truss body has two slide grooves that open back to back along the third direction, and the slide grooves extend along the second direction. The moving member is provided with at least two connecting members, and at least two of the connecting members are connected to pulleys that respectively cooperate with the two slide grooves.

10. The hydrological truss cantilever current measuring vehicle according to claim 9, characterized in that: The first direction, the second direction and the third direction are perpendicular to each other.

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