Water quality on-line monitor

Abstract

The invention discloses a water quality on-line monitor, which belongs to the technical field of water quality monitoring, and comprises a floating body, a floating air bag is installed on the floating body, and a water quality sensor is installed on the floating air bag; the monitoring assembly is rotationally connected to the side face of the floating body; the rotating assembly is connected to the monitoring assembly; the stabilizing assembly is rotationally connected to the monitoring assembly; and the lifting assembly is slidably connected to the monitoring assembly. When the monitoring ship moves, water wheel blades can drive a rotating rod to rotate on a floating body under the action of water flow, the rotating rod can drive a fixed barrel to rotate circumferentially through a rotating frame when rotating, and the fixed barrel can drive a floating air bag on the surface of the fixed barrel to rotate; the floating air bag can drive the pH sensor, the dissolved oxygen sensor and the turbidity sensor to continuously measure key parameters of water quality in real time. The monitoring area of the sensor or the probe can be increased through circumferential rotation, the water quality at different positions can be monitored, and the monitoring accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water quality monitoring, in particular to a water quality on-line monitor. BACKGROUND

[0002] The water quality on-line monitor is a highly automated precision analysis equipment, which can continuously measure the key water quality parameters such as pH value, dissolved oxygen (DO) and turbidity of water through the pH sensor, dissolved oxygen (DO) sensor and turbidity sensor arranged in the water body for 24 hours. The water quality on-line monitor can capture the instantaneous change and trend of water quality parameters, which cannot be achieved by traditional laboratory manual sampling, and is crucial for early warning of sudden pollution events.

[0003] The existing water quality on-line monitor usually fixes and installs the sensor and probe at a specific position on the bottom of the water, and can quickly obtain water quality data by real-time reading. However, this kind of water quality on-line monitor also has certain limitations, such as small measurement range and inaccurate monitoring in the case of complex bottom terrain. Therefore, it is necessary to provide a water quality on-line monitor to solve the above problems. SUMMARY

[0004] In view of the deficiencies in the prior art, the purpose of the embodiments of the present application is to provide a water quality on-line monitor to solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A water quality on-line monitor comprises:

[0007] A floating body, a floating air bag is installed on the floating body, and a water quality sensor is installed on the floating air bag;

[0008] A monitoring assembly is rotationally connected to the side surface of the floating body, and four groups of floating air bags are slidingly connected to the surface of the monitoring assembly;

[0009] A rotating assembly is connected to the monitoring assembly, and is used to cooperate with the floating body to realize the circumferential rotation of the monitoring assembly;

[0010] A stabilizing assembly is rotationally connected to the monitoring assembly, and is engagedly connected to the surface of the floating body, and is used to cooperate with the floating body to realize the deceleration of the monitoring assembly, thereby realizing the stability of the monitoring assembly;

[0011] A lifting assembly is slidingly connected to the monitoring assembly, and is used to drive the monitoring assembly to lift and lower;

[0012] A counting assembly is rotationally connected to the lifting assembly, and is used to count the height of the lifting and lowering of the lifting assembly;

[0013] The limiting assembly is connected to the counting assembly and is used for limiting the counting assembly.

[0014] As a preferred technical scheme of the present application, the monitoring assembly comprises: a rotating rod rotatably connected to the center of the floating body and having water wheel blades mounted on the surface thereof; a rotating frame having one end connected to the surface of the rotating rod and the other end connected to a fixed cylinder, the surface of the fixed cylinder being marked with scale lines; a lifting rod slidably connected to the inside of the fixed cylinder through a spline shaft and a spline sleeve; a tripod fixed to the lower end of the lifting rod and having a roller rotatably connected to the inside thereof.

[0015] As a preferred technical scheme of the present application, the rotating assembly comprises: a gear ring provided on the floating body; and a gear mounted on the upper end of the fixed cylinder and engaged with the gear ring.

[0016] As a preferred technical scheme of the present application, the stabilizing assembly comprises: a side frame connected to the side surface of the rotating rod, the side frame having a rotating shaft rotatably connected to the surface thereof; an inclined frame having one end fixed to the surface of the rotating shaft and the other end fixed to a counterweight; a limiting frame connected to the end of the inclined frame close to the rotating shaft, the side surface of the limiting frame being provided with a concave tooth; a sliding piece slidably connected to the surface of the rotating rod and having one end connected to the floating body through an elastic piece; a connecting rod having one end hingedly connected to the sliding piece and the other end hingedly connected to the inclined frame; and a convex tooth provided on the surface of the floating body and engaged with the concave tooth when the limiting frame rotates downward.

[0017] As a preferred technical scheme of the present application, the lifting assembly comprises: an L-shaped frame fixed to the upper surface of the gear and having a winding shaft rotatably connected to the inside thereof, the surface of the winding shaft being connected to the L-shaped frame through a torsion spring; and a non-deformation transmission rope having one end wound around the surface of the winding shaft and the other end penetrating through the inside of the fixed cylinder and connected to the end of the lifting rod.

[0018] As a preferred technical scheme of the present application, the counting assembly comprises: a first bevel gear fixed to the end of the winding shaft; a transmission shaft rotatably connected to the L-shaped frame, the end of the transmission shaft being fixed to a second bevel gear, the first bevel gear being engaged with the second bevel gear; a driving wheel fixed to the surface of the transmission shaft, the side surface of the driving wheel being fixed to a rotating column; and a driven shaft rotatably connected to the L-shaped frame, the surface of the driven shaft being fixed to a driven wheel; and a sliding groove provided on the driven wheel, the rotating column being slidably connected to the inside of the sliding groove.

[0019] As a preferred technical scheme of the present application, the limiting assembly comprises: a half wheel mounted on the surface of the transmission shaft; and an arc-shaped groove provided on the driven wheel, the half wheel being rotatably connected to the inside of the arc-shaped groove.

[0020] As a preferred technical scheme of the present application, the L-shaped frame is fixed with a protective frame for protecting the driven wheel.

[0021] As a preferred technical scheme of the present application, the upper side of the floating body is connected with an extension seat.

[0022] Compared with the prior art, the embodiment of the present application has the following beneficial effects: when the monitoring ship is moving, the water wheel blades will drive the rotating rod to rotate on the floating body under the action of the water flow, the rotating rod will drive the fixed cylinder to rotate in a circle through the rotating frame, and then the fixed cylinder can drive the floating air bag on its surface to rotate, and the floating air bag can drive the pH sensor, the dissolved oxygen sensor and the turbidity sensor to measure the key parameters of water quality in real time and continuously. The circumferential rotation can increase the monitoring area of the sensor or the probe, the water quality at different positions can be monitored, and the monitoring accuracy is improved.

[0023] When the sediment is accumulated on the water bottom, the roller moves to the surface of the accumulated sediment, and the roller will push the lifting rod to slide upward in the fixed cylinder under the action of the accumulated sediment. The number of turns of the invariable deformation transmission rope wound on the surface of the winding shaft can be read to measure the water depth through the counting component. Compared with the direct measurement using the measuring scale in the prior art, the present application has the characteristics of high measurement accuracy and large range.

[0024] In order to more clearly illustrate the structural features and effects of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The overall structure schematic diagram of the water quality on-line monitor provided by the embodiment of the present application is shown.

[0026] Figure 2 The front view of the water quality on-line monitor provided by the embodiment of the present application is shown.

[0027] Figure 3 The partial enlarged view of the A part in the figure is shown. Figure 1

[0028] The partial enlarged view of the B part in the figure is shown. Figure 4 Figure 1 The partial enlarged view of the C part in the figure is shown.

[0029] Figure 5 Figure 4 The partial enlarged view of the C part in the figure is shown.

[0030] ​​Mark No. : 1, floating body; 10, floating air bag; 11, extension seat; 2, monitoring assembly; 21, rotating rod; 22, water wheel blade; 23, rotating frame; 24, fixed cylinder; 25, lifting rod; 26, tripod; 27, roller; 3, stabilizing assembly; 31, side frame; 32, rotating shaft; 33, tilting frame; 34, limiting frame; 341, concave tooth; 35, sliding piece; 36, elastic piece; 37, connecting rod; 38, counterweight; 39, convex tooth; 4, rotating assembly; 41, gear ring; 42, gear; 5, lifting assembly; 51, U-shaped frame; 52, winding shaft; 53, non-deformation transmission rope; 6, counting assembly; 61, first bevel gear; 62, transmission shaft; 621, second bevel gear; 63, drive wheel; 64, rotating column; 65, driven shaft; 66, driven wheel; 67, sliding groove; 7, limiting assembly; 71, half wheel; 72, arc-shaped slot; 8, protective frame. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0032] The specific implementation of the present application is described in detail below with reference to specific embodiments.

[0033] Reference Figures 1-5 A water quality on-line monitor comprises:

[0034] A floating body 1 is provided with a floating air bag 10, and the floating air bag 10 is provided with a water quality sensor;

[0035] A monitoring assembly 2 is rotationally connected to the side surface of the floating body 1, and four groups of floating air bags 10 are slidingly connected to the surface of the monitoring assembly 2;

[0036] A rotating assembly 4 is connected to the monitoring assembly 2, and is used to cooperate with the floating body 1 to realize the circumferential rotation of the monitoring assembly 2;

[0037] A stabilizing assembly 3 is rotationally connected to the monitoring assembly 2, and is clampedly connected to the surface of the floating body 1, and is used to cooperate with the floating body 1 to realize the deceleration of the monitoring assembly 2, thereby realizing the stability of the monitoring assembly 2;

[0038] A lifting assembly 5 is slidingly connected to the monitoring assembly 2, and is used to drive the monitoring assembly 2 to lift and lower;

[0039] A counting assembly 6 is rotationally connected to the lifting assembly 5, and is used to count the height of the lifting and lowering of the lifting assembly 5;

[0040] A limiting assembly 7 is connected to the counting assembly 6, and is used to limit the counting assembly 6.

[0041] In one embodiment of the present application, as shown in Figure 1 and Figure 2 The monitoring assembly 2 comprises:

[0042] The rotating rod 21 is rotatably connected to the center of the floating body 1, and the water wheel blade 22 is mounted on the surface of the rotating rod 21.

[0043] The rotating frame 23 is connected to one end of the surface of the rotating rod 21, and the fixed cylinder 24 is connected to the other end, and the fixed cylinder 24 is marked with scale lines on the surface.

[0044] The lifting rod 25 is slidably connected to the inside of the fixed cylinder 24 through the spline shaft and the spline sleeve.

[0045] The tripod 26 is fixed to the lower end of the lifting rod 25, and the roller 27 is rotatably connected inside the tripod 26.

[0046] In this embodiment, the upper side of the floating body 1 is connected with the extension seat 11, and when the water quality is monitored in real time, the floating body 1 is first fixed on the monitoring ship through the extension seat 11. After the floating body 1 is installed, the floating air bag 10 will float on the surface of the fixed cylinder 24, and the water depth of the port can be preliminarily read through the scale change on the surface of the fixed cylinder 24. The lower side of the floating air bag 10 is provided with a water quality sensor, which is a pH sensor, a dissolved oxygen (DO) sensor and a turbidity sensor, which can measure the pH value, dissolved oxygen (DO) and turbidity of the water quality in real time and continuously.

[0047] In one embodiment of the present application, as shown in Figure 1 The rotating assembly 4 comprises:

[0048] The gear ring 41 is opened in the floating body 1.

[0049] The gear 42 is mounted on the upper end of the fixed cylinder 24 and is engaged with the gear ring 41.

[0050] In this embodiment, when the monitoring ship is moving, the water wheel blade 22 will drive the rotating rod 21 to rotate on the floating body 1 under the action of the water flow, and the rotating rod 21 will drive the fixed cylinder 24 to rotate in a circle when rotating, and then the fixed cylinder 24 can drive the floating air bag 10 on the surface to rotate, and the monitoring area of the water quality sensor can be increased through the circular rotation, and the monitoring accuracy is improved by monitoring the water quality at different positions.

[0051] The fixed cylinder 24 drives the gear 42 on the surface thereof to rotate in a circle in the process of rotation, the gear 42 drives the fixed cylinder 24 to rotate on the rotating frame 23 under the action of the gear ring 41, and the fixed cylinder 24 drives the tripod 26 to rotate in a circle and also drives the tripod 26 to rotate by the lifting rod 25, so that the tripod 26 can drive the roller 27 to rotate in a circle and rotate, and the roller 27 is driven to rotate by the tripod 26, which can prevent the roller 27 from being jammed under the action of mud or stones, and improve the smoothness of the monitoring process.

[0052] In one embodiment of the application, as shown in Figure 3 The stabilizing assembly 3 comprises:

[0053] The side frame 31 is connected to the side of the rotating rod 21, and the rotating shaft 32 is rotatably connected to the side frame 31.

[0054] The inclined frame 33 is fixed at the end of the rotating shaft 32, and the counterweight 38 is fixed at the end of the inclined frame 33 away from the rotating shaft 32.

[0055] The limiting frame 34 is connected to the end of the inclined frame 33 close to the rotating shaft 32, and the recessed teeth 341 are formed on the side of the limiting frame 34.

[0056] The sliding member 35 is slidably connected to the surface of the rotating rod 21, and the end thereof is connected to the floating body 1 through the elastic member 36.

[0057] The connecting rod 37 is hingedly connected to the sliding member 35 at one end and to the inclined frame 33 at the other end.

[0058] The protruding teeth 39 are formed on the surface of the floating body 1, and the protruding teeth 39 and the recessed teeth 341 are engaged when the limiting frame 34 rotates downward.

[0059] In this embodiment, when the rotating rod 21 rotates on the floating body 1, the inclined frame 33 is driven to rotate by the side frames 31 on both sides, and the counterweight 38 at the end of the inclined frame 33 is driven to rotate, and when the rotating rod 21 rotates too fast under the action of the water wheel blade 22, the counterweight 38 is opened outward under the action of centrifugal force, so that the counterweight 38 drives the rotating shaft 32 to rotate on the side frame 31 through the inclined frame 33, and the limiting frame 34 is inclined downward when the inclined frame 33 rotates, until the recessed teeth 341 on the lower side of the limiting frame 34 contact the protruding teeth 39 on the surface of the floating body 1, and the rotating rod 21 is slowed down under the action of friction between the recessed teeth 341 and the protruding teeth 39, so that the water wheel blade 22 is speed-limited, and the floating body 1 is prevented from rolling over due to the excessive speed of the water wheel blade 22.

[0060] When the counterweight 38 drives the tilt frame 33 to expand outward, the tilt frame 33 will drive the sliding piece 35 to slide downward on the surface of the rotating rod 21 through the connecting rod 37, and the sliding piece 35 will compress the elastic piece 36 when sliding downward, and the elastic piece 36 is specifically a spring; when the rotating speed of the water wheel blade 22 drives the rotating rod 21 to reduce on the floating body 1, the centrifugal force generated by the counterweight 38 is reduced at this time, so that the sliding piece 35 will be reset upward on the surface of the rotating rod 21 under the elastic force of the elastic piece 36.

[0061] In an embodiment of the present application, as shown in Figure 4 the lifting assembly 5 comprises:

[0062] The H-shaped frame 51 is fixed on the upper surface of the gear 42, and the inside is rotatably connected with the winding shaft 52, and the surface of the winding shaft 52 is connected with the H-shaped frame 51 through a torsion spring;

[0063] The non-deformation transmission rope 53 is wound on the surface of the winding shaft 52 at one end, and the other end penetrates through the inside of the fixed cylinder 24 and is connected with the end of the lifting rod 25.

[0064] In this embodiment, when the lifting rod 25 drives the roller 27 to move on the water bottom through the triangular frame 26, when the roller 27 moves to the low-lying position, at this time the lifting rod 25 will slide downward in the inside of the fixed cylinder 24 under the action of gravity, and the lifting rod 25 will drive the winding shaft 52 to rotate on the H-shaped frame 51 when sliding downward, and the winding shaft 52 will compress the torsion spring when rotating.

[0065] When the water bottom is accumulated with silt, the roller 27 moves to the surface of the accumulated silt, and the roller 27 will push the lifting rod 25 to slide upward in the inside of the fixed cylinder 24 under the action of the accumulated silt, so that the non-deformation transmission rope 53 is loosened, and the winding shaft 52 will be reversely rotated on the H-shaped frame 51 under the action of the torsion spring, so that the winding shaft 52 can timely wind the non-deformation transmission rope 53, preventing the non-deformation transmission rope 53 from being too loose.

[0066] In an embodiment of the present application, as shown in Figure 5 the counting assembly 6 comprises:

[0067] The first bevel gear 61 is fixed on the end of the winding shaft 52;

[0068] The transmission shaft 62 is rotatably connected with the H-shaped frame 51, and the end of the transmission shaft 62 is fixed with the second bevel gear 621, and the first bevel gear 61 and the second bevel gear 621 are meshingly connected;

[0069] The driving wheel 63 is fixed on the surface of the transmission shaft 62, and the side surface of the driving wheel 63 is fixed with the rotating column 64;

[0070] The driven shaft 65 is rotatably connected to the frame 51, and the driven wheel 66 is fixed on the surface of the driven shaft 65.

[0071] The sliding groove 67 is arranged on the driven wheel 66, and the rotating column 64 is slidably connected in the sliding groove 67.

[0072] In the embodiment, when the winding shaft 52 rotates, the first bevel gear 61 at the end of the winding shaft 52 rotates synchronously, the first bevel gear 61 drives the transmission shaft 62 to rotate on the frame 51 through the connection with the second bevel gear 621, the transmission shaft 62 drives the rotating column 64 to rotate through the driving wheel 63, when the rotating column 64 rotates to the inside of the sliding groove 67, at this time, the driven wheel 66 drives the driven shaft 65 to rotate on the frame 51 under the action of the sliding groove 67 and the rotating column 64, until the rotating column 64 rotates out of the sliding groove 67.

[0073] In one embodiment of the present application, as shown in the figure, Figure 5 the limiting assembly 7 comprises:

[0074] The half wheel 71 is installed on the surface of the transmission shaft 62.

[0075] The arc-shaped groove 72 is arranged on the driven wheel 66, and the half wheel 71 is rotatably connected in the arc-shaped groove 72.

[0076] In the embodiment, when the rotating column 64 rotates out of the sliding groove 67, the transmission shaft 62 drives the half wheel 71 to rotate to the inside of the arc-shaped groove 72, so that the driven wheel 66 is positioned under the action of the half wheel 71 and the arc-shaped groove 72, thereby improving the stability of the driven wheel 66 after rotation. The sliding groove 67 is arranged on the surface of the driven wheel 66 in ten groups, and the surface of the driven wheel 66 is marked with numbers, when the winding shaft 52 drives the non-deformation transmission rope 53 to wind around the surface for one turn, the driven shaft 65 also drives the driven wheel 66 to rotate one position, so that the number of turns of the non-deformation transmission rope 53 wound around the surface of the winding shaft 52 can be counted. Figure 5 As shown in the figure, the driven shaft 65, the driven wheel 66 and the rotating column 64 are all installed in two groups, which facilitates the counting of the non-deformation transmission rope 53 wound around the surface of the winding shaft 52 in a large number of turns.

[0077] In one embodiment of the present application, as shown in the figure, Figure 2 the frame 51 is fixed with a protective frame 8, and the protective frame 8 is used for protecting the driven wheel 66. The protective frame 8 is a transparent plate, which can protect the counting assembly 6 as a whole and can also read the counting assembly 6. By reading the reading of the scale on the surface of the fixed cylinder 24 and subtracting the reading of the counting assembly 6, the actual water depth can be obtained, which has the characteristics of high measurement accuracy.

[0078] The working principle of the present application is that when the monitoring ship is moving, the water wheel blade 22 will drive the rotating rod 21 to rotate on the floating body 1 under the action of the water flow, the rotating rod 21 will drive the fixed cylinder 24 to rotate in a circle through the rotating frame 23, and then the fixed cylinder 24 can drive the floating air bag 10 on its surface to rotate, and the floating air bag 10 can drive the pH sensor, the dissolved oxygen (DO) sensor and the turbidity sensor to measure the key parameters of water quality in real time and continuously. The circular rotation can increase the monitoring area of the sensor or the probe, the water quality at different positions can be monitored, and the monitoring accuracy is improved.

[0079] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A water quality online monitoring instrument, characterized in that, include: A float (1) is mounted on the float (1), and a floating airbag (10) is mounted on the floating airbag (10); The monitoring component (2) is rotatably connected to the side of the float (1), and the floating airbag (10) is slidably connected to the surface of the monitoring component (2); A rotating component (4) is connected to the monitoring component (2) and is used to cooperate with the float (1) to achieve the circumferential rotation of the monitoring component (2); The stabilizing component (3) is rotatably connected to the monitoring component (2) and engages with the surface of the float (1). It is used to cooperate with the float (1) to decelerate the monitoring component (2) and thus achieve the stability of the monitoring component (2). The lifting component (5) is slidably connected to the monitoring component (2) and is used to drive the monitoring component (2) to lift. The counting component (6) is rotatably connected to the lifting component (5) and is used to count the height of the lifting component (5) as it rises and falls. A limiting component (7) is connected to the counting component (6) and is used to limit the counting component (6).

2. The online water quality monitoring instrument according to claim 1, characterized in that, The monitoring component (2) includes: The rotating rod (21) is rotatably connected to the center of the float (1), and a water turbine blade (22) is installed on its surface; The rotating frame (23) has one end connected to the surface of the rotating rod (21) and the other end connected to the fixed cylinder (24), the surface of which is marked with scale lines; The lifting rod (25) is slidably connected to the inside of the fixed cylinder (24) via a spline shaft and a spline sleeve; A tripod (26) is fixed to the lower end of the lifting rod (25), and a roller (27) is rotatably connected inside the tripod (26).

3. The online water quality monitoring instrument according to claim 2, characterized in that, The rotating component (4) includes: Gear ring (41) is formed on the float (1); The gear (42) is installed at the upper end of the fixed cylinder (24) and meshes with the gear ring (41).

4. The online water quality monitoring instrument according to claim 3, characterized in that, The stabilizing component (3) includes: A side frame (31) is connected to the side of the rotating rod (21), and a rotating shaft (32) is rotatably connected to the side frame (31); The tilting frame (33) is fixed at one end to the surface of the rotating shaft (32), and a counterweight (38) is fixed at the end of the tilting frame (33) away from the rotating shaft (32); A limiting frame (34) is connected to the end of the tilting frame (33) near the rotating shaft (32), and the side of the limiting frame (34) is provided with concave teeth (341); The sliding member (35) is slidably connected to the surface of the rotating rod (21), and its end is connected to the float (1) through the elastic member (36); The connecting rod (37) is hinged at one end to the sliding member (35) and at the other end to the tilting frame (33); A convex tooth (39) is formed on the surface of the float (1). When the limit frame (34) rotates downward, the convex tooth (39) and the concave tooth (341) engage and connect.

5. The online water quality monitoring instrument according to claim 4, characterized in that, The lifting assembly (5) includes: The gusseted frame (51) is fixed on the upper surface of the gear (42), and a winding shaft (52) is rotatably connected inside. The surface of the winding shaft (52) is connected to the gusseted frame (51) by a torsion spring. An invariable transmission rope (53) has one end wrapped around the surface of the take-up shaft (52) and the other end passing through the inside of the fixed cylinder (24) and connected to the end of the lifting rod (25).

6. The online water quality monitoring instrument according to claim 5, characterized in that, The counting component (6) includes: The first bevel gear (61) is fixed to the end of the take-up shaft (52); A drive shaft (62) is rotatably connected to a frame (51). A second bevel gear (621) is fixed at the end of the drive shaft (62). The first bevel gear (61) and the second bevel gear (621) are meshed together. A drive wheel (63) is fixed to the surface of a transmission shaft (62), and a rotating column (64) is fixed to the side of the drive wheel (63); Driven shaft (65) is rotatably connected to the frame (51), and driven wheel (66) is fixed on the surface of driven shaft (65); A groove (67) is formed on the driven wheel (66), and a rotating column (64) is slidably connected inside the groove (67).

7. The online water quality monitoring instrument according to claim 6, characterized in that, The limiting component (7) includes: Half-wheel (71) is mounted on the surface of drive shaft (62); An arc-shaped groove (72) is formed on the driven wheel (66), and the half wheel (71) is rotatably connected inside the arc-shaped groove (72).

8. The online water quality monitoring instrument according to claim 5, characterized in that, A protective frame (8) is fixed on the C-shaped frame (51), which is used to protect the driven wheel (66).

9. The online water quality monitoring instrument according to claim 1, characterized in that, An extension seat (11) is connected to the upper side of the float (1).

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