A buoy type water quality monitoring device

CN224744944UActive Publication Date: 2026-09-11济南市生态环境监控中心
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Patent Information

Application Number
CN202522166457.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-14
Publication Date
2026-09-11
Estimated Expiration
2035-10-14

AI Technical Summary

Technical Problem

[0004]本实用新型为解决以上技术问题,提出了一种浮标式水质监测装置,通过插接模块化的设计,可按照实际监测需求搭配选择相对应的监测传感器,使用灵活度高,适用范围广,同时插接模块化的设计取消了现有设计中的连接线缆线束,消除了因线缆线束腐蚀老化造成的稳定性低、可靠性差、使用寿命短的缺陷

Benefits of technology

(1)采用可拆卸的插嵌在浮标体上的若干个监测传感器,可根据监测需求选择对应的水质监测传感器,从而满足不同水质参数的在线监测,使用灵活度高适用范围广,无需花费高昂的成本定制水质监测装置;

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to environmental monitoring equipment technical field provides a kind of buoy type water quality monitoring device, including buoy body, the detachable insertion in the several monitoring sensors of buoy body on the plug-in board piece of detachable setting buoy body upper end surface;The plug-in board piece inside is provided with the power supply unit and main control unit being connected, the lower end surface of plug-in board piece is provided with several plug-in interfaces being electrically connected with the main control unit, the plug-in interface and the docking interface of the top end portion of monitoring sensor corresponding plug-in connection.The utility model provides a kind of buoy type water quality monitoring device, by plug-in modularization's design, can be according to actual monitoring demand collocation selection corresponding monitoring sensor, high degree of use flexibility, wide range of application, while plug-in modularization's design cancels the connecting cable wire harness in existing design, eliminates the defect of low stability, poor reliability, short service life caused by cable wire harness corrosion aging.
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Description

Technical Field

[0001] This utility model belongs to the field of environmental monitoring equipment technology, and specifically relates to a buoy-type water quality monitoring device. Background Technology

[0002] With increasing emphasis on environmental governance, the demand for real-time and continuous water quality monitoring of rivers, lakes, and reservoirs is becoming increasingly urgent. Buoy-type water quality monitoring stations are widely used due to their flexible deployment and lack of shore-based infrastructure. However, existing buoy-type water quality monitoring devices generally suffer from the following problems: Firstly, excessive integration leads to maintenance difficulties. Water quality monitoring sensors are usually fixedly connected to the buoy body, making it difficult to calibrate or replace individual sensors. When a component malfunctions, the entire device often needs to be replaced or repaired, affecting normal water quality monitoring. Secondly, limited functionality and poor expandability. Existing water quality monitoring devices are generally equipped with commonly used Class 5 or Class 7 water quality monitoring sensors (such as pH sensors, conductivity sensors, dissolved oxygen sensors, turbidity sensors, etc.), resulting in limited water quality monitoring functionality. Furthermore, the lack of expandability in the structural design makes it difficult to flexibly add or remove monitoring parameters according to water quality monitoring needs, resulting in poor flexibility and a narrow range of applications. In addition, the water quality monitoring sensors in existing water quality monitoring buoys are generally electrically connected to the controller in the equipment compartment through cable harnesses. However, the connecting cable harnesses are usually exposed on the outside and are in a humid environment for a long time, which makes them very susceptible to moisture and corrosion, causing damage to the cable harnesses and affecting the normal use of the water quality monitoring buoys.

[0003] Therefore, it is necessary to design a buoy-type water quality monitoring device that can at least solve some of the above problems and defects. Summary of the Invention

[0004] To solve the above technical problems, this utility model proposes a buoy-type water quality monitoring device. Through a plug-in modular design, the corresponding monitoring sensors can be selected according to actual monitoring needs, which is highly flexible and has a wide range of applications. At the same time, the plug-in modular design eliminates the connection cable harness in the existing design, thus eliminating the defects of low stability, poor reliability and short service life caused by corrosion and aging of the cable harness.

[0005] The technical solution of this utility model is: This utility model proposes a buoy-type water quality monitoring device, including a buoy body, several monitoring sensors that are detachably embedded in the buoy body, and a detachable plug-in plate set on the upper surface of the buoy body. The plug-in plate is internally equipped with a power supply unit and a main control unit connected to each other. The lower end face of the plug-in plate is provided with several plug-in interfaces that are electrically connected to the main control unit. The plug-in interfaces are plugged into and connected to the docking interface at the top end of the monitoring sensor.

[0006] Preferably, the buoy body is provided with a plurality of vertical through slots adapted to the monitoring sensor, and the upper end face of the buoy body is provided with a countersunk hole located at the top of the through slot, and the docking interface is fitted into the countersunk hole.

[0007] Preferably, the countersunk hole is provided with an inwardly extending positioning block, the plug-in interface is also provided with an inwardly extending positioning block, and the mating interface is provided with a positioning groove that matches the positioning block.

[0008] Preferably, the lower end face of the buoy body is provided with a filter sleeve located at the bottom end of the through groove, the filter sleeve is fixedly connected to the buoy body and is provided with a plurality of filter holes penetrating the side wall. The lower end face of the buoy body is also provided with a counterweight block that is fixedly connected to it.

[0009] Preferably, the monitoring sensors include one or more of the following: water quality pH sensor, water quality conductivity sensor, water quality dissolved oxygen sensor, water quality turbidity sensor, water quality COD sensor, water quality ammonia nitrogen sensor, water quality ISA sensor, water quality ORP sensor, water quality nitrate nitrogen sensor, water quality salinity sensor, water quality suspended solids sensor, water quality sludge concentration sensor, and water quality hardness sensor.

[0010] Preferably, the lower end face of the plug-in plate is provided with a downwardly extending accommodating compartment, the power supply unit is fixedly disposed in the accommodating compartment, and the upper end face of the buoy body is provided with a placement slot adapted to the accommodating compartment.

[0011] Preferably, the upper surface of the plug-in plate is provided with a solar panel that is detachably connected thereto. The solar panel is electrically connected to the power supply unit. The upper surface of the plug-in plate is provided with a limiting barrier that extends upward and is adapted to the solar panel. The solar panel is embedded in the limiting barrier.

[0012] Preferably, the plug-in plate is further provided with a detachable sealing plate covering the solar panel and the limiting barrier. The sealing plate is provided with a window adapted to the solar panel and a sealing sleeve adapted to the limiting barrier. The sealing sleeve is fitted around the outer perimeter of the limiting barrier.

[0013] Preferably, the buoy body is further provided with a rotatable protective cover sleeved around its outer periphery, and the bottom end face of the protective cover sleeve is not higher than the bottom end face of the filter tube sleeve. The outer wall of the buoy body is provided with an annular ball groove and annular protrusions on the upper and lower sides of the annular ball groove. The inner wall of the protective cover is provided with a number of ball heads extending inward and annular protrusions on the upper and lower sides of the ball heads. The annular protrusions are spaced apart on the upper and lower sides of the annular protrusions. The ball heads are movably embedded in the annular ball groove.

[0014] Preferably, the outer wall of the protective cover cylinder is provided with outwardly protruding ribs, the ribs are arranged at an angle and are in the shape of rounded arcs, and there are several ribs arranged at uniform intervals along the circumferential direction.

[0015] This utility model has the following advantages and effects compared with the prior art: (1) Several detachable monitoring sensors are embedded in the buoy body. The corresponding water quality monitoring sensor can be selected according to the monitoring needs, so as to meet the online monitoring of different water quality parameters. It is highly flexible and has a wide range of applications, without the need to spend high costs to customize water quality monitoring devices. (2) A detachable plug-in plate is used on the upper surface of the buoy body. The plug-in plate is connected to the docking interface of several monitoring sensors through several plug-in interfaces on its lower surface to realize data acquisition and transmission. The plug-in structure design simplifies the connection process, making maintenance and replacement more convenient. At the same time, it eliminates the existence of the connection cable harness in the existing design, avoiding the problems of unstable connection, poor reliability and short service life caused by moisture and corrosion of the cable harness. (3) The docking interface and plug-in interface are positioned and connected by positioning blocks and positioning slots, which facilitates the positioning and fixing of the monitoring sensor into the through slot of the buoy body. At the same time, it facilitates the insertion of the pin socket in the docking interface and plug-in interface, avoids docking deviation, and plays a positioning and guiding role in the insertion process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the buoy-type water quality monitoring device in Embodiment 1 of this utility model; Figure 2 This is an exploded structural diagram of the buoy-type water quality monitoring device in Embodiment 1 of this utility model; Figure 3 This is a schematic diagram of the plug-in plate in the buoy-type water quality monitoring device of Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of the structure of the buoy-type water quality monitoring device in Embodiment 2 of this utility model; Figure 5 This is an exploded structural diagram of the buoy-type water quality monitoring device in Embodiment 2 of this utility model; Figure 6 for Figure 5 A magnified structural diagram of position A in the middle.

[0017] Reference numerals: 1. Buoy body; 11. Through groove; 12. Countersunk hole; 13. Filter sleeve; 14. Counterweight block; 15. Placement groove; 16. Annular ball groove; 17. Annular flange; 2. Monitoring sensor; 21. Docking interface; 22. Positioning groove; 3. Insertion plate; 31. Insertion interface; 32. Reception compartment; 33. Limiting barrier; 4. Positioning block; 5. Solar panel; 6. Sealing plate; 61. Window; 62. Sealing sleeve; 7. Protective cover; 71. Ball head; 72. Annular flange; 73. Rib; 8. Locking bolt. Detailed Implementation

[0018] To enable those skilled in the art to better understand this utility model, it will now be further described in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this utility model.

[0019] Example 1: like Figures 1-3 As shown, this utility model provides a buoy-type water quality monitoring device, which includes a buoy body 1, several detachable monitoring sensors 2 vertically embedded in the buoy body 1, and a detachable plug-in plate 3 disposed on the upper surface of the buoy body 1. The plug-in plate 3 internally houses a power supply unit and a main control unit connected thereto. The lower surface of the plug-in plate 3 has several plug-in interfaces 31 electrically connected to the main control unit. Each plug-in interface 31 is plugged into a corresponding docking interface 21 at the top end of the monitoring sensor 2, allowing connection between the plug-in interface 31 and the docking interface 21 of the monitoring sensor 2, thereby receiving and transmitting water quality monitoring data collected by the monitoring sensor 2. Through the modular plug-in design, the corresponding monitoring sensor 2 can be selected according to actual monitoring needs, offering high flexibility and wide applicability. Furthermore, the modular plug-in design eliminates the need for connecting cable harnesses in existing water quality monitoring buoys, thus eliminating the defects of low stability, poor reliability, and short service life caused by corrosion and aging of cable harnesses.

[0020] Buoy body 1 is specifically made of polyethylene, but other engineering plastics can also be used; details will not be provided here. (Reference) Figure 2As shown, the buoy body 1 has several vertical through slots 11 adapted to the monitoring sensor 2, so as to insert and fix the monitoring sensor 2 in the through slots 11. The upper end face of the buoy body 1 has a countersunk hole 12 located at the top of the through slot 11. The docking interface 21 of the top end of the monitoring sensor 2 is inserted into the countersunk hole 12 to fix the monitoring sensor 2. It should be noted that the docking interface 21 of the top end of the countersunk hole 12 and the monitoring sensor 2 adopts a sealed and waterproof structure (not shown in the figure) to avoid moisture and corrosion of the interface. In addition, the edge connection between the plug plate 3 and the upper end face of the buoy body 1 also adopts a sealed and waterproof structure, thereby further improving the sealing and waterproof performance. Since the sealed and waterproof structure (such as sealing ring, etc.) is a mature existing technology in this field, its specific structure and principle will not be described in detail here.

[0021] Furthermore, in combination Figure 2 and Figure 3 As shown, the countersunk hole 12 is provided with an inwardly extending positioning block 4, and the plug-in interface 31 is also provided with an inwardly extending positioning block 4. The docking interface 21 at the top end of the monitoring sensor 2 is provided with a positioning groove 22 that matches the positioning block 4, so as to realize the insertion and positioning of the monitoring sensor 2 through the positioning action between the positioning block 4 and the positioning groove 22, thereby facilitating the direct insertion of the docking interface 21 and the plug-in interface 31 at the bottom of the plug-in plate 3. Specifically, in this embodiment, the docking interface 21 at the top end of the monitoring sensor 2 and the plug-in interface 31 of the plug-in plate 3 are respectively provided with a matching 9-pin RS485 interface to realize data transmission communication between the monitoring sensor 2 and the main control unit. Since the RS485 interface is a commonly used data communication interface in the field, its specific wiring and pin definitions will not be described in detail here. In addition, the main control unit can adopt the controller commonly used in existing water quality monitoring buoy devices, and the main control unit can integrate a wireless communication module, such as 4G / 5G, Beidou / GPS, etc. Since it is a mature existing technology in the field, its specific structure diagram is not shown and its principle will not be described in detail here.

[0022] like Figure 1 and Figure 2 As shown, a filter sleeve 13 is provided on the lower end face of the buoy body 1, located at the bottom end of the through groove 11. The filter sleeve 13 is fixedly connected to the buoy body 1 and has several filter holes penetrating its side wall to filter and protect the probe of the monitoring sensor 2 that extends into the filter sleeve 13, preventing clogging caused by deposits. A counterweight block 14 is also provided on the lower end face of the buoy body 1 and fixedly connected thereto to lower the center of gravity of the overall device, improve stability, and prevent tipping.

[0023] Optionally, in some embodiments, the lower end face of the buoy body 1 is also provided with an anchor chain and an anchor head that are fixedly connected thereto, so as to realize the anchoring and positioning of the buoy body 1 and the overall water quality monitoring device.

[0024] Furthermore, the monitoring sensor 2 includes one or more of the following: water quality pH sensor, water quality conductivity sensor, water quality dissolved oxygen sensor, water quality turbidity sensor, water quality COD sensor, water quality ammonia nitrogen sensor, water quality ISA sensor, water quality ORP sensor, water quality nitrate nitrogen sensor, water quality salinity sensor, water quality suspended solids sensor, water quality sludge concentration sensor, and water quality hardness sensor. Of course, it may also include other ion-based water quality sensors, which will not be listed here.

[0025] Combination Figure 1 and Figure 2 As shown, in this embodiment, the plug-in plate 3 is detachably mounted on the upper surface of the buoy body 1 by a number of locking bolts 8. Specifically, there are five locking bolts 8 evenly spaced along the circumference, the plug-in plate 3 has five vertical through holes, and the upper surface of the buoy body 1 has five evenly spaced screw holes, so that the plug-in plate 3 can be locked and fixed by the locking bolts 8.

[0026] Furthermore, the insertion interface 31 on the lower end face of the insertion plate 3 corresponds one-to-one with the countersunk hole 12 on the upper end face of the buoy body 1, so as to realize the relative insertion of the insertion interface 31 and the docking interface 21 at the top end of the monitoring sensor 2 located in the countersunk hole 12. The insertion interface 31 is provided with a positioning block 4 that matches the positioning groove 22 of the docking interface 21, so as to further ensure the correct insertion of the insertion interface 31 and the interface of the monitoring sensor 2. It should be noted that the insertion plate 3 adopts a sealed and waterproof design. Since the main control unit and power supply unit are arranged inside, the sealed and waterproof design can effectively prevent the internal circuit from being damp and corroded, thereby improving the overall stability and reliability of the application.

[0027] like Figure 2 and Figure 3 As shown, the lower end face of the plug-in plate 3 is provided with a downwardly extending accommodating compartment 32. The power supply unit is fixedly installed in the accommodating compartment 32. Specifically, the power supply unit is a power supply battery, which is fixedly installed in the accommodating compartment 32. The upper end face of the buoy body 1 is provided with a placement groove 15 that is adapted to the accommodating compartment 32, so that the accommodating compartment 32 can be extended into the placement groove 15, thereby lowering the center of gravity of the overall device and providing stability to the overall device.

[0028] refer to Figure 2 As shown, furthermore, a solar panel 5 is detachably connected to the upper surface of the plug-in plate 3. The solar panel 5 achieves electrical connection with the power supply unit through its own power transmission interface and the plug-in interface provided on the upper surface of the plug-in plate 3, so as to transmit and store the solar-generated electrical energy into the power supply unit. A limiting barrier 33 is provided on the upper surface of the plug-in plate 3, which extends upward and is adapted to the solar panel 5, and the solar panel 5 is embedded in the limiting barrier 33.

[0029] Combination Figure 1 and Figure 2 As shown, the plug-in plate 3 is also provided with a detachable sealing plate 6 covering the solar panel 5 and the limiting barrier 33. The sealing plate 6 is provided with an opening 61 adapted to the solar panel 5 and a sealing sleeve 62 adapted to the limiting barrier 33. The sealing plate 6 presses against the upper end face of the limiting barrier 33 and the solar panel 5, and the sealing sleeve 62 is fitted around the outer perimeter of the limiting barrier 33 to achieve sealing and waterproofing of the lower end face of the solar panel 5 and the plug-in interface and power transmission interface located in the limiting barrier 33. Specifically, the sealing plate 6 is provided with a number of holes corresponding one-to-one with the through holes of the plug-in plate 3. In this embodiment, the sealing plate 6 is provided with five holes. The locking bolt 8 can pass through the holes, through holes and screw holes from top to bottom to achieve a detachable connection between the sealing plate 6, the plug-in plate 3 and the buoy body 1.

[0030] Example 2: In Embodiment 2 of this utility model, using Figures 4-6 The following description will be provided. Furthermore, descriptions of parts that are no different from those in Embodiment 1 will be omitted, and the same reference numerals will be used instead.

[0031] like Figure 4 and Figure 5 As shown, the buoy-type water quality monitoring device of this utility model includes a buoy body 1 with a rotatable protective cover 7 fitted around its outer periphery. The bottom end face of the protective cover 7 is not higher than the bottom end face of the filter tube sleeve 13, in order to block foreign objects such as branches and water-attached objects, preventing foreign objects from getting stuck or tangled around the outer periphery of the filter tube sleeve 13 and affecting normal water quality monitoring. Because the protective cover 7 is a rotatable cylindrical structure, when it encounters branches or water-attached objects, it will rotate under the action of the foreign objects and the water body, thereby bypassing the foreign objects and allowing them to automatically detach from the protective cover 7, without getting tangled or stuck between multiple filter tube sleeves 13, thus ensuring the normal operation of water quality monitoring.

[0032] Specifically, in combination Figure 5 and Figure 6As shown, the outer wall of the buoy body 1 is provided with an annular ball groove 16 and annular protrusions 17 extending outward on both the upper and lower sides of the annular ball groove 16. The inner wall of the protective cover 7 is provided with several ball heads 71 ​​extending inward and annular protrusions 72 extending inward on both the upper and lower sides of the ball heads 71. The annular protrusions 72 are spaced apart on the upper and lower sides of the annular protrusions 17. The ball heads 71 ​​are evenly spaced along the circumference and are movably embedded in the annular ball groove 16. It should be noted that the annular protrusions 72 and the annular protrusions 17 are spaced apart to form a certain sealing effect on the internal space of the ball heads 71 ​​and the annular ball groove 16 without affecting the normal rotation of the protective cover 7, thus preventing impurities from entering the ball groove and affecting the normal rotation of the protective cover 7. Of course, to improve the smoothness of the rotation of the protective cover 7, some lubricating oil can be pre-placed between the annular ball groove 16 and the ball heads 71 ​​to improve the smoothness of rotation and reduce the resistance required for rotation.

[0033] Further reference Figure 5 As shown, two sets of annular ball grooves 16, ball heads 71, annular convex edges 17, and annular convex stops 72 are arranged at intervals along the axial direction to improve the stability of the support for the protective cover cylinder 7 and the reliability of its rotational operation.

[0034] like Figure 4 As shown, further, the outer wall of the protective cover 7 is provided with outwardly protruding ribs 73. The ribs 73 are arranged at an angle and are spaced several times along the circumference. The arc-shaped ribs 73 are rounded arcs to prevent foreign objects from adhering and fixing to the outer wall of the protective cover 7. At the same time, the multiple arc-shaped ribs 73 can increase the pushing force of foreign objects and water on the protective cover 7, so that when foreign objects appear, the foreign objects and water will push the protective cover 7 to rotate to a greater extent, thereby driving the foreign objects around the whole device and preventing them from adhering to the water quality monitoring device.

[0035] In summary, the buoy-type water quality monitoring device provided by this utility model, through its plug-in modular design, allows for the selection of corresponding monitoring sensors according to actual monitoring needs, resulting in high flexibility and wide applicability. At the same time, the plug-in modular design eliminates the need for connecting cable harnesses in existing designs, thus eliminating the defects of low stability, poor reliability, and short service life caused by corrosion and aging of cable harnesses.

[0036] The above are merely preferred embodiments of the present utility model and do not limit the patent scope of the present utility model. All equivalent changes and modifications made within the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A buoyant water quality monitoring device, characterized by: It includes a buoy body (1), several monitoring sensors (2) that are detachably inserted into the buoy body (1), and a detachable plug-in plate (3) that is set on the upper end face of the buoy body (1). The plug-in plate (3) is provided with a power supply unit and a main control unit connected to each other. The lower end face of the plug-in plate (3) is provided with a number of plug-in interfaces (31) that are electrically connected to the main control unit. The plug-in interfaces (31) are connected to the docking interface (21) at the top end of the monitoring sensor (2).

2. The buoy-type water quality monitoring device according to claim 1, characterized in that: The buoy body (1) is provided with several vertical through slots (11) that are adapted to the monitoring sensor (2). The upper end face of the buoy body (1) is provided with a countersunk hole (12) located at the top of the through slot (11). The docking interface (21) is embedded in the countersunk hole (12).

3. The buoyant water quality monitoring device of claim 2, wherein: The countersunk hole (12) is provided with an inwardly extending positioning block (4), the plug-in interface (31) is also provided with an inwardly extending positioning block (4), and the docking interface (21) is provided with a positioning groove (22) that is compatible with the positioning block (4).

4. The buoyant water quality monitoring device of claim 2, wherein: The lower end face of the buoy body (1) is provided with a filter sleeve (13) located at the bottom end of the through groove (11). The filter sleeve (13) is fixedly connected to the buoy body (1) and is provided with a number of filter holes penetrating the side wall. The lower end face of the buoy body (1) is also provided with a counterweight block (14) fixedly connected to it.

5. The buoyant water quality monitoring device of claim 1, wherein: The monitoring sensor (2) includes one or more of the following: water quality pH sensor, water quality conductivity sensor, water quality dissolved oxygen sensor, water quality turbidity sensor, water quality COD sensor, water quality ammonia nitrogen sensor, water quality ISA sensor, water quality ORP sensor, water quality nitrate nitrogen sensor, water quality salinity sensor, water quality suspended solids sensor, water quality sludge concentration sensor, and water quality hardness sensor.

6. The buoyant water quality monitoring device of claim 1, wherein: The lower end face of the plug plate (3) is provided with a downwardly extending accommodating compartment (32), the power supply unit is fixedly installed in the accommodating compartment (32), and the upper end face of the buoy body (1) is provided with a placement slot (15) adapted to the accommodating compartment (32).

7. The buoy-type water quality monitoring device according to claim 1, characterized in that: The upper surface of the plug-in plate (3) is provided with a solar panel (5) that can be detachably connected thereto. The solar panel (5) is electrically connected to the power supply unit. The upper surface of the plug-in plate (3) is provided with a limiting barrier (33) that extends upward and is adapted to the solar panel (5). The solar panel (5) is embedded in the limiting barrier (33).

8. The buoyant water quality monitoring device of claim 7, wherein: The plug-in plate (3) is also provided with a detachable sealing plate (6) covering the solar panel (5) and the limiting barrier (33). The sealing plate (6) is provided with an opening (61) adapted to the solar panel (5) and a sealing sleeve (62) adapted to the limiting barrier (33). The sealing sleeve (62) is fitted around the outer perimeter of the limiting barrier (33).

9. The buoyant water quality monitoring device of claim 4, wherein: The buoy body (1) is also provided with a rotatable protective cover (7) sleeved on its outer periphery, and the bottom end face of the protective cover (7) is not higher than the bottom end face of the filter tube sleeve (13). The outer wall of the buoy body (1) is provided with an annular ball groove (16) and an annular protrusion (17) located on the upper and lower sides of the annular ball groove (16). The inner wall of the protective cover (7) is provided with a number of ball heads (71) extending inward and annular protrusions (72) located on the upper and lower sides of the ball heads (71). The annular protrusions (72) are spaced apart on the upper and lower sides of the annular protrusion (17). The ball heads (71) are movably embedded in the annular ball groove (16).

10. The buoy-type water quality monitoring device according to claim 9, characterized in that: The outer wall of the protective cover (7) is provided with outward protruding ribs (73). The ribs (73) are arranged at an angle and are rounded arcs. There are several ribs (73) and they are evenly spaced along the circumference.