Rotary nozzle flushing device and water quality detection equipment

Abstract

The utility model discloses a rotary spray head flushing device and water quality detection equipment, the rotary spray head flushing device comprises a rotary spray head assembly, a liquid inlet pipe and a limiting assembly, the liquid inlet pipe is connected with the rotary spray head assembly and is used for providing cleaning liquid for the rotary spray head assembly, the liquid inlet pipe is transversely arranged above the rotary spray head assembly, and the limiting assembly is connected with the rotary spray head assembly. The limiting assembly is mounted on the liquid inlet pipe; the rotary spray head assembly comprises a rotating shaft, at least one spray head rod arranged in the circumferential direction of the rotating shaft at intervals, and a plurality of spray heads arranged on the spray head rod; the limiting assembly comprises an elastic limiting part extending in the direction towards the spray head rod, the elastic limiting part is used for elastically abutting against the spray head rod, and the acting force of the elastic limiting part on the spray head rod is smaller than that of the spray head driving the spray head rod to rotate. The flushing device for the rotary spray head assembly can be limited and fixed after the rotary spray head assembly stops rotating, interference of the rotary spray head assembly on detection operation is effectively avoided, and the limiting structure is simple and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to a rotary nozzle flushing device and water quality detection equipment using the rotary nozzle flushing device. Background Art

[0002] At present, in water quality testing equipment, a rotating nozzle is generally configured to automatically flush the water sample box. However, in order to avoid the interference of the rotating nozzle with the sampling and testing operations, the rotating nozzle can usually only be set at the bottom of the water sample box. For example, the small water quality monitoring station provided by Chinese utility model patent CN209215369U sets the rotating nozzle at the bottom of the detection pool to flush the detection pool. This structure not only requires the rotating nozzle to be fixedly connected to the detection pool, which is difficult to disassemble and repair and maintain, but also causes cleaning dead corners at the bottom of the detection pool, and also causes the bottom of the detection pool to have openings, which is prone to water seepage and leakage problems. Utility Model Content

[0003] The utility model primarily provides a rotary nozzle flushing device to solve the technical problems that the existing rotary nozzle can only be arranged at the bottom of a water sample box, which results in difficulty in disassembly and assembly, dead corners for cleaning, and easy water seepage and leakage.

[0004] The utility model also provides a water quality monitoring device, which adopts the above-mentioned rotating nozzle flushing device.

[0005] According to a first aspect of the utility model, a rotary nozzle flushing device is provided, comprising a rotary nozzle assembly, a liquid inlet pipe and a limit assembly, wherein the liquid inlet pipe is connected to the rotary nozzle assembly and is used to provide cleaning liquid to the rotary nozzle assembly, the liquid inlet pipe is horizontally arranged above the rotary nozzle assembly, and the limit assembly is installed on the liquid inlet pipe;

[0006] The rotating spray head assembly comprises a rotating shaft and a plurality of spray head rods arranged at intervals along the circumference of the rotating shaft, and a plurality of spray heads arranged on the spray head rod along the length direction of the spray head rod, the spray head rod is arranged to extend radially along the rotating shaft, the spray heads are arranged to be inclined relative to the vertical direction on the same side of the spray head rod, and the spray heads are used to spray cleaning liquid and drive the spray head rod to rotate along the rotating shaft through the reaction force when spraying the cleaning liquid;

[0007] The limiting assembly includes an elastic limiting portion extending in the direction toward the nozzle rod, the elastic limiting portion is used to elastically abut the nozzle rod, and the force exerted by the elastic limiting portion on the nozzle rod is smaller than the force exerted by the nozzle to drive the nozzle rod to rotate, so that the elastic limiting portion can be pushed away by the nozzle rod when the nozzle drives the nozzle rod to rotate, and the elastic limiting portion can be elastically reset and the nozzle rod can be limited and fixed when the nozzle stops spraying cleaning fluid.

[0008] Preferably, the liquid inlet pipe is provided with an anti-slip segment, and the limiting assembly is sleeved on the anti-slip segment and extends in a direction toward the spray head rod to form the elastic limiting portion.

[0009] Preferably, the anti-slip segment is configured as an external hexagonal structure.

[0010] Preferably, the limiting assembly further comprises a collar portion sleeved on the liquid inlet pipe, and the elastic limiting portion is connected to the collar portion and the length thereof extending relative to the collar portion is adjustable.

[0011] Preferably, the distance between the abutment position of the elastic limiting portion on the nozzle rod and the rotating shaft is 50% to 80% of the total length of the nozzle rod.

[0012] Preferably, there are three spray head rods, and the three spray head rods are arranged equidistantly along the circumference of the rotating shaft, so that the angle between two adjacent spray head rods is 120 degrees.

[0013] Preferably, a plurality of the limiting assemblies are provided at intervals along the length direction of the liquid inlet pipe, and the elastic limiting parts of the plurality of limiting assemblies are respectively used to elastically abut against different positions of the spray head rod.

[0014] According to the second aspect of the utility model, there is also provided a water quality detection device, comprising the above-mentioned rotating nozzle flushing device, a water sample box and a multi-parameter probe device;

[0015] The water sample box comprises a water sample cavity and an opening opened on the top of the water sample cavity;

[0016] The multi-parameter probe device is mounted above the water sample box, and the multi-parameter probe device includes a multi-parameter probe and a lifting mechanism connected to the multi-parameter probe and used to drive the multi-parameter probe to move up and down;

[0017] The rotating spray head assembly is mounted at the opening of the water sample box, and the liquid inlet pipe is offset relative to the bottom of the multi-parameter probe.

[0018] Preferably, the water quality testing equipment also includes a multi-station turntable device, which is mounted between the water sample box and the multi-parameter probe device. The multi-station turntable device includes a sample tray and a rotating mechanism connected to the sample tray. The upper surface of the sample tray is circumferentially arranged with a detection station and a plurality of standard sample stations. The detection station is provided with a first detection hole for communicating with the opening, and the standard sample station is provided with a standard sample bottle group for containing standard samples. The rotating mechanism is used to drive the sample tray to rotate and to rotate the detection station or the standard sample station to be directly below the multi-parameter probe.

[0019] Preferably, the multi-parameter probe comprises a plurality of detection electrodes, one of which is a turbidity electrode;

[0020] The multi-parameter probe device also includes a stirring and cleaning mechanism, which includes an injection needle arranged on the turbidity electrode and a two-way pump connected to the injection needle, and a buffer component arranged between the two-way pump and the injection needle. The two-way pump is used to suck the liquid at the injection needle into the buffer component, and the two-way pump is also used to discharge the liquid in the buffer component along the injection needle.

[0021] The utility model has the following beneficial effects:

[0022] The nozzle of the rotary nozzle flushing device provided by the utility model is tilted, and the nozzle can drive the nozzle rod to rotate along the rotating shaft through the reaction force when spraying the cleaning liquid during the process of spraying the cleaning liquid, so as to realize the automatic rotation type all-round cleaning operation, effectively improve the flushing effect, and the flushing structure is simple and efficient. Secondly, by installing a limit assembly with damping elasticity on the liquid inlet pipe, when the nozzle stops spraying the cleaning liquid, the limit assembly can elastically abut the nozzle rod and circumferentially limit the nozzle rod, so that the nozzle rod avoids the specified position, effectively avoiding the nozzle rod from blocking and interfering with the work of other devices, ensuring smooth and interference-free movement between various mechanisms, and then appropriately extending the length of the nozzle rod and increasing the number of nozzles, further improving the flushing effect, and the rotary nozzle flushing device can be installed above the container to be flushed, so that the rotary nozzle flushing device is separated from the container to be flushed, effectively avoiding the problem that the rotary nozzle assembly is difficult to disassemble, repair and maintain, and there is no cleaning dead corner in the container to be flushed, no hole is required, and there will be no water seepage and leakage problems.

[0023] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0025] Figure 1 A three-dimensional diagram of a water quality detection device provided by an embodiment of the utility model;

[0026] Figure 2 for Figure 1 The three-dimensional diagram of the water quality testing equipment shown after the water sample box is removed;

[0027] Figure 3 for Figure 1 A three-dimensional diagram of a multi-parameter probe device in a water quality testing device shown;

[0028] Figure 4 for Figure 1 A three-dimensional diagram of a multi-station turntable device in a water quality testing device shown;

[0029] Figure 5 for Figure 4 An exploded view of the multi-station turntable device shown;

[0030] Figure 6 for Figure 5 A three-dimensional view of the sample tray in the multi-station turntable device taken from another angle;

[0031] Figure 7 for Figure 5 An exploded view of a standard sample bottle in a multi-station carousel device is shown;

[0032] Figure 8 for Figure 7 The schematic diagram of the cross-sectional structure of the standard sample bottle in use is shown;

[0033] Fig. 9 for Figure 8 A schematic cross-sectional structure diagram of a magnetic suction cover in a standard sample bottle shown;

[0034] Fig.10 for Fig. 9 A schematic cross-sectional structure diagram of another embodiment of a magnetic suction cover is shown;

[0035] Fig.11 for Fig. 9 A schematic cross-sectional structure diagram of another embodiment of a magnetic cover is shown;

[0036] Fig.12 for Figure 2 A three-dimensional diagram of a rotating nozzle flushing device in a water quality testing device shown;

[0037] Fig.13 A flow path diagram of the stirring and cleaning mechanism provided in an embodiment of the utility model.

[0038] Legend:

[0039] 1000, water quality testing equipment; 1, water sample box; 2, multi-station turntable device; 21, sample tray; 211, first detection hole; 212, cleaning tank; 213, standard sample bottle set; 214, positioning notch; 215, positioning pin; 216, petal-shaped limiting flange; 217, handle; 22, rotating mechanism; 221, fixing ring; 2211, positioning groove; 222, rotating ring; 2221, positioning boss; 2222, positioning hole; 2223, induction component; 223, limit switch; 224, driving wheel; 225, rotating driving component; 23, inner cover; 231, second detection hole; 232, positioning block; 24, blowing seat; 241, blowing hole; 200, standard sample bottle; 201, bottle body; 2011, bottle mouth; 202, magnetic ring; 203, magnetic suction cover; 2031 , reinforcement part; 2032, magnetic body; 2033, sealing rubber sleeve; 2034, guiding slope; 204, pressure cover; 2041, through hole; 3, multi-parameter probe device; 31, multi-parameter probe; 311, detection electrode; 32, lifting mechanism; 321, lifting seat; 33, stirring and cleaning mechanism; 331, injection needle; 332, two-way pump; 333, buffer component; 34, first flow path pipeline; 35, second flow path pipeline; 351, flow meter; 36, flow path control unit; 37, waste liquid tank; 38, ultrasonic cleaning rod; 4, rotating nozzle flushing device; 41, rotating nozzle assembly; 411, rotating shaft; 412, nozzle rod; 413, nozzle; 42, liquid inlet pipe; 421, anti-slip segment; 43, limit assembly; 431, elastic limit part; 432, collar part. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. However, the present invention can be implemented in a variety of different ways as defined and covered below.

[0041] like Fig.12 As shown, an embodiment of the utility model provides a rotating nozzle flushing device 4, including a rotating nozzle assembly 41, a liquid inlet pipe 42 and a limit assembly 43, the rotating nozzle assembly 41 is used to be erected at the top opening of the water sample box 1 and is centered relative to the opening, the liquid inlet pipe 42 is connected to the rotating nozzle assembly head 41 and is used to provide cleaning liquid for the rotating nozzle assembly 41, the liquid inlet pipe 42 is horizontally arranged above the rotating nozzle assembly 41 and is offset relative to the bottom of the multi-parameter probe 311, and the limit assembly 43 is installed on the liquid inlet pipe 42.

[0042] Preferably, the rotating nozzle assembly 41 includes a rotating shaft 411 and at least one nozzle rod 412 arranged along the circumference of the rotating shaft 411, and a plurality of nozzles 413 arranged on the nozzle rod 412 along the length direction of the nozzle rod 412. The nozzle rod 412 is extended radially along the rotating shaft 411, and the nozzles 413 are inclined relative to the vertical direction on the same side of the nozzle rod 412. The nozzles 413 are used to spray cleaning liquid toward the water sample chamber of the water sample box 1 and drive the nozzle rod 412 to rotate along the rotating shaft 411 through the reaction force when spraying the cleaning liquid. That is, the rotating nozzle assembly 41 is rotated by the oblique water flow force, and there is no need to set up a rotating motor.

[0043] Preferably, the limiting assembly 43 includes an elastic limiting portion 431 extending in the direction toward the nozzle rod 412, and the elastic limiting portion 431 is used to elastically abut the nozzle rod 412. The force exerted by the elastic limiting portion 431 on the nozzle rod 412 is smaller than the force exerted by the nozzle 413 to drive the nozzle rod 412 to rotate, so that the elastic limiting portion 431 can be pushed away by the nozzle rod 413 when the nozzle 413 drives the nozzle rod 412 to rotate, and the elastic limiting portion 431 can be elastically reset and the nozzle rod 412 can be limited and fixed when the nozzle 413 stops spraying cleaning fluid, and one of the nozzle rods 412 is limited by the elastic limiting portion 431.

[0044] Since the nozzle 413 of the rotating nozzle flushing device 4 is tilted, the nozzle 413 can drive the nozzle rod 412 to rotate along the rotating shaft 411 through the reaction force when spraying the cleaning liquid, so as to realize automatic rotation and all-round cleaning operation, effectively improve the flushing effect, and the flushing structure is simple and efficient. Secondly, by installing a limit assembly 43 with damping elasticity on the liquid inlet pipe 42, when the nozzle 413 stops spraying the cleaning liquid, the limit assembly 43 can elastically abut the nozzle rod 412 and circumferentially limit the nozzle rod 412, so that the nozzle rod 412 avoids the specified position, effectively avoiding the nozzle rod 412 from blocking and interfering with the work of other devices, ensuring smooth and interference-free operation between the mechanisms, and then appropriately extending the length of the nozzle rod 412 and increasing the number of the nozzles 413, further improving the flushing effect. The rotating nozzle flushing device 4 can be installed above the container to be flushed, so that the rotating nozzle flushing device 4 is separated from the container to be flushed, effectively avoiding the problem that the rotating nozzle assembly 41 is difficult to disassemble, repair and maintain. Moreover, there is no dead corner for cleaning the container to be flushed, no holes need to be opened, and no water seepage or leakage problems will occur.

[0045] Preferably, the liquid inlet pipe 42 is provided with an anti-slip segment 421, and the limiting assembly 43 is sleeved on the anti-slip segment 421 and extends in the direction toward the spray head rod 412 to form the elastic limiting portion 431. The installation position of the limiting assembly 43 is limited and fixed by the anti-slip segment 421, so as to prevent the limiting assembly 43 from being displaced by the repeated pushing action of the spray head rod 412 during the high-speed rotation of the rotating spray head assembly 41, thereby ensuring the limiting effect of the limiting assembly 43.

[0046] Preferably, the anti-slip segment 421 is configured as an external hexagonal structure, which can not only strengthen the fixation of the limit assembly 43 , but also serve as a wrench clamp for the liquid inlet pipe 42 , making it convenient to insert the wrench to disassemble and assemble the liquid inlet pipe 42 .

[0047] Preferably, the limiting assembly 43 also includes a ring portion 432 sleeved on the liquid inlet pipe 42, and the elastic limiting portion 431 is connected to the ring portion 432 and the length extending relative to the ring portion 432 is adjustable, so as to flexibly adjust the limiting resistance of the elastic limiting portion 431 relative to the nozzle rod 412, so as to avoid the elastic limiting portion 431 affecting the smooth rotation of the rotating nozzle assembly 41, and ensure the limiting effect during the deceleration process of the rotating nozzle assembly 41 stopping rotation.

[0048] Preferably, the distance between the abutment position of the elastic limiting portion 431 on the nozzle rod 412 and the rotating shaft 411 is 50% to 80% of the total length of the nozzle rod 412, so as to reduce the limiting resistance by utilizing the lever principle, so that the elastic limiting portion 431 can easily limit the nozzle rod 412. It is worth noting that when the distance between the abutment position of the elastic limiting portion 431 on the nozzle rod 412 and the rotating shaft 411 is less than 50% of the total length of the nozzle rod 412, the elastic limiting portion 431 will find it difficult to stop the nozzle rod 412 in time, causing the nozzle rod 412 to pass over the elastic limiting portion 431 and stay directly below the multi-parameter probe 31. However, when the distance between the abutment position of the elastic limiting portion 431 on the nozzle rod 412 and the rotating shaft 411 is more than 80% of the total length of the nozzle rod 412, the resistance of the elastic limiting portion 431 to the nozzle rod 412 will be too large, causing the rotation of the nozzle rod 412 to easily get stuck.

[0049] Furthermore, there are three nozzle rods 412, which are equidistantly arranged along the circumference of the rotating shaft 411, so that the angle between two adjacent nozzle rods 412 is 120 degrees, ensuring the flushing effect while providing a certain avoidance space between two adjacent nozzle rods 412, so as to facilitate the passage of the multi-parameter probe 31.

[0050] Furthermore, the limiting assembly 43 is provided with one or more. When the limiting assembly 43 is provided with multiple, the multiple limiting assemblies 43 are arranged at intervals along the length direction of the liquid inlet pipe 42. The elastic limiting parts 431 of the multiple limiting assemblies 43 are respectively used to elastically abut against different positions of the nozzle rod 412, and the lengths of the elastic limiting parts 431 of the multiple limiting assemblies 43 are the same or different. The nozzle rod 412 is limited and fixed by the multiple limiting assemblies 43, which effectively improves the limiting effect. When some of the limiting assemblies 43 are damaged, the nozzle rod 412 can still be limited by other limiting assemblies 43, thereby improving the fault tolerance rate.

[0051] Please combine Figure 1 and Figure 2 As a second aspect, the embodiment of the utility model further provides a water quality detection device 1000, comprising the above-mentioned rotating nozzle flushing device 4, as well as a water sample box 1 and a multi-parameter probe device 3. The water sample box 1 comprises a water sample chamber and an opening on the top of the water sample chamber. The multi-parameter probe device 3 is mounted above the water sample box 1, and the multi-parameter probe device 3 comprises a multi-parameter probe 31 and a lifting mechanism 32 connected to the multi-parameter probe 31 and used to drive the multi-parameter probe 31 to move up and down. The rotating nozzle assembly 41 is mounted at the opening of the water sample box 1, and the liquid inlet pipe 42 is offset relative to the bottom of the multi-parameter probe 31.

[0052] The water quality monitoring equipment 1000 drives the multi-parameter probe 31 to descend into the water sample box 1 through the lifting mechanism 32 to perform water sample detection operations. Since the rotating nozzle flushing device 4 is provided with a limit assembly 43, the limit assembly 43 can be used to make the nozzle rod 412 of the rotating nozzle assembly 41 avoid the state directly below the multi-parameter probe 31 after stopping rotation, without affecting the lifting action of the multi-parameter probe 31, thereby ensuring smooth and interference-free operation of each mechanism, and the limit structure is simple and efficient.

[0053] Preferably, the water quality testing equipment 1000 also includes a multi-station turntable device 2, which is mounted between the water sample box 1 and the multi-parameter probe device 3. The multi-station turntable device 2 includes a sample tray 21 and a rotating mechanism 22 connected to the sample tray 21 and used to drive the sample tray 21 to rotate. The upper surface of the sample tray 21 is circumferentially arranged with detection stations and at least one standard sample station. The detection station is provided with a first detection hole 211 for communicating with the opening. The standard sample station is provided with a standard sample bottle group 213 for holding standard samples. When there are multiple standard sample stations, the standard sample bottle groups 213 on different standard sample stations are respectively used to hold standard samples of different concentrations, so as to realize multiple standard sample verification / calibration operations.

[0054] Specifically, the rotating mechanism 22 is used to drive the sample tray 21 to rotate and rotate the detection station or the standard sample station to directly below the multi-parameter probe 31. The rotation of the multi-station turntable device 2 can realize flexible switching between the detection station and the standard sample station. The lifting mechanism 32 in the multi-parameter probe device 3 drives the multi-parameter probe 31 to move up and down, so that the multi-parameter probe 31 can realize detection or standard sample verification / calibration operations. There is no need to configure multiple sets of valve bodies, pumps and circulation pools to realize the conversion between detection and standard sample verification / calibration operations, which effectively simplifies the equipment structure, reduces the equipment size, avoids the problem of blockage of the water intake pipeline or the valve body, and improves the detection accuracy and standard sample verification / calibration accuracy of the multi-parameter probe 31.

[0055] Preferably, a cleaning station is further provided on the upper surface of the sample tray 21 , and a cleaning pool 212 is provided on the cleaning station. The rotating mechanism 22 is also used to drive the cleaning station on the sample tray 21 to rotate to directly below the multi-parameter probe 31 .

[0056] Since the water quality testing equipment 1000 is also provided with the cleaning station on the sample tray 21, the sample tray 21 can be driven to rotate by the rotating mechanism 22, and the cleaning tank 212 on the cleaning station can be rotated to directly below the multi-parameter probe 31, thereby realizing automatic switching between more stations, and the multi-parameter probe 31 can be automatically cleaned by the cleaning station before each detection or each standard sample verification / calibration, effectively avoiding cross-influence between different water samples and / or different standard samples, and the multi-parameter probe 31 can be immersed in the clean water of the cleaning tank when not in use to achieve the effect of maintaining the multi-parameter probe 31, thereby increasing the service life of the multi-parameter probe 31.

[0057] like Figure 5 As shown, the rotating mechanism 22 includes a fixed ring 221 and a rotating ring 222 . The rotating ring 222 is connected to the fixed ring 221 and is used to rotate relative to the fixed ring 221 . The sample tray 21 is mounted on the rotating ring 222 .

[0058] Preferably, the multi-station turntable device 2 further comprises an inner cover 23 connected to the fixing ring 221, the inner cover 23 is located below the sample tray 21 and is provided with a second detection hole 231 facing the multi-parameter probe 31. The first detection hole 211 is used to be connected to the opening through the second detection hole 231 when the first detection hole 211 is rotated to the position directly below the multi-parameter probe 31, and the first detection hole 211 is also used to separate the opening through the inner cover 23 when the first detection hole 211 is rotated to a position deviating from the multi-parameter probe 31, and then the inner cover 23 is used to cover and seal the opening when no detection operation is required, so that the water sample is isolated from the outside air, and the representativeness of the water sample is ensured.

[0059] Specifically, since the inner cover 23 is installed on the fixing ring 221, the inner cover 23 is fixed relative to the water sample box 1. When the detection station of the sample tray 21 is rotated to the position directly below the multi-parameter probe 31 and the water sample detection operation is performed, the first detection hole 211 and the second detection hole 231 are arranged opposite to each other, and the opening can be connected through the first detection hole 211 and the second detection hole 231; and when the cleaning station or the standard sample station of the sample tray 21 is rotated to the position directly below the multi-parameter probe 31, the first detection hole 211 and the second detection hole 231 are staggered from each other, and the inner cover 23 can be automatically covered. The first detection hole 211 is sealed to prevent the first detection hole 211 from being connected to the opening, so that the water sample is isolated from the outside air, and the representativeness of the water sample is ensured. The automatic opening and closing of the first detection hole 211 can be achieved by rotating the sample plate 21 to switch the workstation. Only when the detection workstation is directly below the multi-parameter probe 31, the first detection hole 211 will be connected to the opening, so that the workstation switching action and the opening and closing action of the first detection hole 211 produce a synergistic effect. The structure is simple and efficient, and there is no need to additionally set up an opening and closing cover structure, so that the water sample is isolated from the outside air, the representativeness of the water sample is ensured, and the detection accuracy is improved.

[0060] It should be understood that in this embodiment, the fixing ring 221 is independently provided to facilitate accurate positioning and fixing, and to facilitate disassembly, assembly, maintenance or replacement. In other embodiments, the fixing ring 221 can also be fixedly installed on the opening of the water sample box 1 or directly formed integrally with the water sample box 1. In this case, installing the rotating ring 222 on the fixing ring 221 can also drive the sample plate 21 to rotate and switch positions on the water sample box 1 through the rotating ring 222, and the fixing ring 221 and the water sample box 1 can also be disassembled and assembled at the same time, reducing the assembly process and improving the convenience of use and repair and maintenance.

[0061] Preferably, the multi-station turntable device 2 further comprises an air blowing seat 24, which is set below the second detection hole 231 and is used for the multi-parameter probe 31 to pass through. The inner circle of the air blowing seat 24 is provided with an air blowing hole 241 for blowing air toward the multi-parameter probe 31. Preferably, the air blowing hole 241 is set as an annular structure surrounding the multi-parameter probe 31. When the multi-parameter probe 31 completes the detection, standard sample or cleaning operation, the detection station can be rotated to the right below the multi-parameter probe 31 and the multi-parameter probe 31 can be driven to rise and fall reciprocally through the lifting mechanism 32, so that the multi-parameter probe 31 moves up and down in the inner circle of the air blowing seat 24, and the high-pressure air blown out through the air blowing hole 241 will dry the water vapor hanging on the outer wall of the multi-parameter probe 31, so as to prevent the liquid from hanging on the surface of the multi-parameter probe 31 and affecting the standard sample verification / calibration result, and to prevent the test water sample from hanging on the surface of the multi-parameter probe 31 and then dripping on the sample disk 21. It should be noted that the blowing seat 24 can be set as a circular ring, a triangular ring, a quadrilateral ring or other polygonal ring structure, as long as it is convenient for the multi-parameter probe 31 to pass through. The blowing holes 241 are arranged along the inner circle of the blowing ring 24 to quickly dry the water vapor on the outer wall of the multi-parameter probe 31.

[0062] Preferably, the sample disk 21 is detachably embedded in the rotating ring 222, and a first positioning structure for circumferentially positioning the sample disk 21 is provided between the sample disk 21 and the rotating ring 222; the inner cover 23 is detachably embedded in the fixed ring 221, and a second positioning structure for circumferentially positioning the inner cover 23 is provided between the inner cover 23 and the fixed ring 221.

[0063] The sample tray 21 and the inner cover 23 of the multi-station turntable device 2 both adopt a detachable structure. The disassembly and assembly process of the sample tray 21 and the inner cover 23 does not affect the drive coupling and positioning of the rotating ring 222, and can also facilitate the replacement or filling of standard samples. After removing the sample tray 21 and the inner cover 23, the opening of the water sample box 1 is completely exposed, which is convenient for cleaning the water sample box 1 and ensuring that the water sample box 1 is clean and pollution-free.

[0064] Please combine Figure 5 and Figure 6The first positioning structure includes a positioning boss 2221 and a positioning notch 214. The positioning boss 2221 is provided on one side of the inner wall of the rotating ring 222. The positioning notch 214 is provided at the bottom of the sample tray 21 and is used to embed the positioning boss 2221. The sample tray 21 is positioned circumferentially by the mutual cooperation between the positioning boss 2221 and the positioning notch 214, so that the sample tray 21 can be quickly and accurately disassembled and assembled, and the sample tray 21 can be quickly and accurately installed back to its original position. In addition, since the rotating ring 222 does not need to be disassembled and assembled, the rotating ring 222 and its related transmission structure remain connected. After reassembling the sample tray 21, there is no need to recouple the transmission structure and re-adjust the travel switch, which is conducive to reducing the difficulty of disassembly and assembly operations and improving operational stability.

[0065] Optionally, the first positioning structure includes a positioning hole 2222 and a positioning pin 215, wherein a plurality of positioning holes 2222 are arranged along the circumference of the rotating ring 222 and are asymmetrically distributed, and the positioning pin 215 is arranged at the bottom of the sample tray 21 and corresponds to the positioning hole 2222 one by one. Through the asymmetrical distribution of the positioning holes 2222 on the circumference of the rotating ring 222 and the mutual cooperation of the positioning pins 215, the circumferential positioning of the sample tray 21 is achieved, the sample tray 21 can be quickly and easily disassembled and assembled, and the sample tray 21 can be quickly and accurately installed back to its original position.

[0066] More preferably, a petal-shaped limiting flange 216 is further provided at the bottom of the sample tray 21, and the positioning notch 214 is provided on one side of the petal-shaped limiting flange 216. The petal-shaped limiting flange 216 includes a plurality of arc-shaped limiting surfaces arranged at intervals along the circumferential direction. The petal-shaped limiting flange 216 is used to be embedded in the inner ring of the rotating ring 222 and to abut against different positions of the inner ring of the rotating ring 222 respectively through a plurality of arc-shaped limiting surfaces, thereby realizing the centering limit of the sample tray 21 relative to the rotating ring 222, and reducing the contact area of ​​the sample tray 21 relative to the inner ring of the rotating ring 222, so as to facilitate quick disassembly and assembly.

[0067] Furthermore, a handle 217 is provided on the upper surface of the sample tray 21 , and two handles 217 are symmetrically provided so that the sample tray 21 can be stably lifted by the handles 217 , thereby facilitating the disassembly and assembly of the sample tray 21 .

[0068] Furthermore, the second positioning structure includes a positioning groove 2211 and a positioning block 232, the positioning groove 2211 is arranged on the fixing ring 221, and the positioning block 232 is arranged on the inner cover 23 and is used to be embedded in the positioning groove 2211. The inner cover 23 is circumferentially positioned through the mutual cooperation of the positioning groove 2211 and the positioning block 232, so that the inner cover 23 can be quickly and accurately disassembled and assembled, ensuring that the inner cover 23 can be quickly and accurately installed back to its original position.

[0069] Furthermore, the rotating ring 222 is respectively provided with sensing components 2223 corresponding to the detection station, the cleaning station and the standard sample station. The rotating mechanism 22 also includes a limit switch 223. The limit switch 223 is arranged on one side of the rotating ring 222 and is used for allowing the sensing component 2223 to pass through when the rotating ring 222 rotates, thereby detecting the positions of the detection station, the cleaning station and the standard sample station in real time, and facilitating the precise rotation of any one of the detection station, the cleaning station and the standard sample station to be directly below the multi-parameter probe 31.

[0070] Furthermore, the sensing components 2223 on the detection station, the cleaning station and the standard sample station are all the same, and an initial position sensing component (not shown in the figure, the same below) is also provided on the rotating ring 222, and the initial position sensing component is composed of at least two sensing components 2223, so that when the initial position sensing component passes through the limit switch 223, it can be determined that the rotating ring 222 is rotated to the initial position, so that the stations corresponding to the remaining sensing components 2223 can be determined in sequence according to the rotation direction of the rotating ring 222, and there is no need to set different sensing components 2223 for different stations, which effectively simplifies the structure, reduces costs, and ensures positioning accuracy.

[0071] Furthermore, the rotating mechanism 22 further includes a driving wheel 224 coaxially connected to the rotating ring 222, and a rotating driving assembly 225 (in Figure 3 ). In this embodiment, the driving wheel 224 is configured as a gear plate, and the driving wheel 224 is integrally formed with the rotating ring 222. The rotating driving assembly 225 includes a driving motor and a driving gear connected to the output shaft of the driving motor. The driving gear is meshed with the gear plate and can drive the gear plate to rotate under the drive of the driving motor, thereby ensuring driving accuracy and stability. In other embodiments, the driving wheel 224 can also be a belt pulley that is sleeved on the outer periphery of the rotating ring 222 and fixed circumferentially relative to the rotating ring 222.

[0072] Please combine Figure 3 and Figure 4Furthermore, the multi-parameter probe 31 includes a plurality of detection electrodes 311, and the standard sample bottle group 213 includes a plurality of standard sample bottles 200 arranged in one-to-one correspondence with the plurality of detection electrodes 311, so that standard samples of different detection electrodes 311 can be contained in different standard sample bottles 200.

[0073] Please combine Figure 7 and Figure 8 The standard sample bottle 200 includes a bottle body 201 and a bottle cap, and the bottle cap includes a magnetic ring 202 and a magnetic cover 203. The magnetic ring 202 is used to cover the bottle mouth 2011 of the bottle body 201. When the bottle is closed, the magnetic ring 202 is arranged around the bottle mouth 2011 and extends radially inwardly along the bottle mouth 2011. The magnetic cover 203 is magnetically attracted to the bottom of the magnetic ring 202 and is used to block the bottle mouth 2011. The magnetic cover 203 is used to be driven by the pushing force of the detection electrode 311 to flip and open relative to the magnetic ring 202 when the detection electrode 311 enters the bottle body 201. The magnetic cover 203 is also used to be driven by the magnetic force of the magnetic ring 202 to reset and block the bottle mouth 2011 when the detection electrode 311 is separated from the bottle body 201.

[0074] Since the bottle cap of the standard sample bottle 200 includes a magnetic ring 202 and a magnetic cover 203, when the cap is closed, the magnetic ring 202 is located at the bottle mouth 2011 of the bottle body 201, so that the magnetic cover 203 is magnetically attracted to the bottom of the magnetic ring 202 to seal the entire bottle mouth 2011, thereby achieving the sealing of the bottle mouth 2011. This not only ensures the sealing effect of the bottle mouth 2011, but also because the magnetic cover 203 has no fixed connection structure, it is convenient to take out the entire magnetic cover 203 for cleaning or replacement, thereby ensuring that there is no dead angle when cleaning the standard sample bottle 200. Secondly, in the process of the detection electrode 311 descending into the bottle body 201, the pushing force of the detection electrode 311 can drive the magnetic cover 203 to flip and open. In the process of the detection electrode 311 rising and separating from the bottle body 201, the magnetic force of the magnetic ring 202 can drive the magnetic cover 203 to reset and seal the bottle mouth 2011, thereby realizing the automatic opening and closing action of the bottle cover without the need to additionally set up an active opening mechanism. The structure is simple and efficient, and can better adapt to standard sample verification / calibration operations.

[0075] like Fig. 9As shown, a reinforcing portion 2031 is provided on one side of the magnetic cover 203 , and the magnetic attraction force of the reinforcing portion 2031 relative to the magnetic ring 202 is greater than the magnetic attraction force of the magnetic cover 203 relative to the magnetic ring 202 at other positions. By providing the reinforcing portion 2031, the magnetic force exerted on the magnetic cover 203 in the circumferential direction is made different. When the detecting electrode 311 descends and pushes open the magnetic cover 203, the side of the magnetic cover 203 subjected to smaller magnetic attraction can be separated from the magnetic ring 202 first, while the side of the magnetic cover 203 subjected to larger magnetic attraction (the side provided with the reinforcing portion) can be tightly adsorbed on the magnetic ring 202, so that the detecting electrode 311 can easily push open the magnetic cover 203 and drive the magnetic cover 203 to flip and open and close, thereby avoiding damage to the detecting electrode 311 due to excessive magnetic attraction resistance, and the magnetic cover 203 will not fall off as a whole relative to the magnetic ring 202 due to overly uniform force exerted on it in the circumferential direction, thereby ensuring automatic opening and closing effect and sealing effect.

[0076] Preferably, the magnetic cover 203 includes a magnetic body 2032 and a sealing rubber sleeve 2033 coated on the outer periphery of the magnetic body 2032. The magnetic body 2032 can be magnetically attracted by the magnetic ring 202. The sealing rubber sleeve 2033 is made of flexible materials such as rubber and silicone. The sealing rubber sleeve 2033 is located on the side of the magnetic body 2032 facing the magnetic ring 202 and is set as a sealing surface. The thickness of the sealing surface at the reinforcing portion 2031 is smaller than the thickness at other positions, so that the distance between the magnetic body 2032 and the magnetic ring 202 at the position of the reinforcing portion 2031 is smaller than the distance between the magnetic body 2032 and the magnetic ring 202 at other positions. The sealing effect of the magnetic cover 203 relative to the bottle mouth 2011 is improved by providing the sealing rubber sleeve 2033, and the magnetic attraction force of the magnetic cover 203 at different positions can be adjusted by adjusting the thickness of the sealing surface at different positions.

[0077] Preferably, the thickness of the magnetic body 2032 at the reinforcement part 2031 is greater than the thickness at other positions, that is, at the position where the thickness of the sealing surface is thinner, the thickness of the magnetic body 2032 is thicker; and at the position where the thickness of the sealing surface is thicker, the thickness of the magnetic body 2032 is thinner, which can not only further enhance the magnetic attraction force of the reinforcement part 2031 relative to the magnetic ring 202, but also balance the overall thickness of the magnetic cover 203, so that the overall thickness of the magnetic cover 203 is uniform, thereby ensuring the sealing effect.

[0078] like Fig.10As shown, in another embodiment, the magnetic body 2032 can also be tilted, and the side of the magnetic body 2032 away from the reinforcement part 2031 is tilted toward the direction away from the magnetic ring 202. At this time, the thickness of the magnetic body 2032 at different positions is evenly set, and the thickness of the sealing surface at the reinforcement part 2031 can also be made smaller than the thickness at other positions. By adjusting the tilt angle of the magnetic body 2032, the magnetic difference of the reinforcement part 2031 relative to other positions can be adjusted.

[0079] Preferably, the magnetic cover 203 is symmetrically arranged at both axial ends of the bottle mouth 2011, that is, the two sealing surfaces are provided and the two sealing surfaces are symmetrically arranged on two opposite surfaces of the magnetic body 2032, so that the magnetic cover 203 does not need to distinguish between the front and back sides, and is convenient for quick assembly and use. When the sealing rubber sleeve 2033 on one side of the magnetic cover 203 is squeezed and deformed due to long-term use, the magnetic cover 203 can be flipped to the other side for continued use, which effectively improves the service life.

[0080] like Fig.11 As shown, in other embodiments, the magnetic cover 203 may also adopt an asymmetric structure, so that the overall thickness of the magnetic cover 203 at the reinforcement portion 2031 is smaller than the thickness at other positions, so that the weight of the magnetic cover 203 at the reinforcement portion 2031 is lighter, and the magnetic attraction of this area relative to the magnetic ring 202 is tighter and more firm, and the weight of the magnetic cover 203 at a position away from the reinforcement portion 2031 is heavier, so that this area is easier to detach from the magnetic ring 202 under the action of its own gravity, and thus it is more conducive to the smooth flipping of the magnetic cover 203 relative to the magnetic ring (202) under the pushing action of external force, thereby preventing the magnetic cover 203 from falling off as a whole.

[0081] Preferably, a guide slope 2034 is provided on the edge of the magnetic cover 203, and the guide slope 2034 is used to guide the magnetic cover 203 to be centered relative to the magnetic ring 202 during the process of the magnetic cover 203 being adsorbed to the magnetic ring 202, thereby avoiding the magnetic cover 203 from tilting and ensuring the sealing effect of the magnetic cover 203 on the bottle mouth 2011.

[0082] Please combine Figure 7 and Figure 8Furthermore, the bottle cap also includes a pressure cap 204, which is detachably connected to the bottle body 201, specifically, a threaded connection or a snap connection can be adopted. The pressure cap 204 can also be sleeved on the bottle body 201 through an interference fit, so as to facilitate quick disassembly and assembly. The pressure cap 304 is used to press the magnetic ring 202 onto the end of the bottle body 201 and shield the magnetic ring 202. The end surface of the pressure cap 304 corresponding to the bottle mouth 2011 is provided with a through hole 2041 adapted to the magnetic suction cover 203. The pressure cap 304 is used to press and shield the magnetic ring 202 to prevent the magnetic ring 202 from being exposed. The through hole 2041 can be used to guide the lifting and lowering movement of the detection electrode 311, so as to prevent the detection electrode 311 from contacting the magnetic ring 202 while ensuring that the detection electrode 311 can accurately push open the magnetic suction cover 203.

[0083] Furthermore, a hook is provided on the pressure cover 204 or the bottle mouth 2011 , and the magnetic ring 202 is detachably connected to the hook and is positioned and fixed by the hook to improve the installation accuracy and stability of the magnetic ring 202 . Specifically, when the hook is arranged on the pressure cover 204, the magnetic ring 202 is detachably connected to the pressure cover 204 through the hook, so that the pressure cover 204 can drive the magnetic ring 202 to cover the bottle body 201 as a whole, which is convenient and quick to assemble in place, and the pressure cover 204 can drive the magnetic ring 202 to be removed as a whole relative to the bottle body 201, quickly exposing the bottle mouth 2011, which is convenient for cleaning and maintenance of the bottle body 201 and the bottle cap; and when the hook is arranged on the bottle mouth 2011, the magnetic ring 202 is directly detachably connected to the bottle mouth 2011 through the hook. At this time, the pressure cover 204 can be omitted, further simplifying the structure, reducing costs, and conveniently observing whether the magnetic ring 202 and the magnetic cover 203 are installed in place, ensuring the installation and positioning accuracy. Optionally, a mounting groove is provided in the gland 204 or on the bottle mouth 2011 , and the magnetic ring 202 is detachably mounted in the mounting groove, thereby achieving positioning and fixing. Of course, the magnetic ring 202 can also be fixedly mounted in the gland 204 .

[0084] like Fig.13As shown, preferably, the multi-parameter probe device 3 also includes a stirring and cleaning mechanism 33, one of the multiple detection electrodes 311 is a turbidity electrode, the stirring and cleaning mechanism 33 includes an injection needle 331 arranged on the turbidity electrode and a two-way pump 332 connected to the injection needle 331, and a buffer component 333 arranged between the two-way pump 332 and the injection needle 331, the pumping direction of the two-way pump 332 is switchable, the two-way pump 332 is used for forward pumping to draw the liquid at the injection needle 331 into the buffer component 333, and the two-way pump 333 is also used for reverse pumping and discharging the liquid in the buffer component 333 along the injection needle 331.

[0085] Specifically, the bidirectional pump 332 of the stirring and cleaning mechanism 33 can draw the liquid at the injection needle 331 into the buffer component 333, or discharge the liquid in the buffer component 333 along the injection needle 331. The liquid at the injection needle 331 can be stirred by the repeated suction and discharge action of the bidirectional pump 332. When the turbidity electrode is in the turbidity standard sample, the turbidity standard sample can be mixed by the stirring and cleaning mechanism 33, making the standard sample verification / calibration more accurate and reliable. When the multi-parameter probe 31 is in the cleaning tank 212, air can be blown into the cleaning liquid by the bidirectional pump 332 to strengthen the cleaning operation and improve the cleaning effect. More importantly, compared with the traditional blade stirring method, only the injection needle 331 needs to be installed on the turbidity electrode to achieve the stirring and mixing operation of the turbidity standard sample. It is small and reliable, and reduces the size of the turbidity standard bottle and the amount of standard sample.

[0086] Furthermore, the buffer component 333 includes a buffer tube that is coiled multiple times, the first end of the buffer tube is connected to the bidirectional pump 332, and the second end of the buffer tube is connected to the injection needle 331. The length of the buffer tube is effectively extended in a limited space by the arrangement of coiling multiple times, thereby increasing the buffer space between the bidirectional pump 332 and the injection needle 331, and achieving buffering of more liquid. In other embodiments, the buffer tube is not limited to the arrangement of coiling multiple times at the same position. The buffer tube can also be coiled at multiple positions, or the buffer tube can be replaced by a buffer bottle with a larger inner diameter, and the injection needle 331 is connected to the bottom end of the buffer bottle, which can also achieve the liquid buffering effect. The buffer bottle can also be used to remove bubbles during the mixing operation, so that the bubbles enter the upper end of the buffer bottle by themselves, effectively preventing too much air from entering the turbidity standard liquid, making the standard sample verification / calibration more accurate and reliable.

[0087] Preferably, the multi-parameter probe device 3 further includes a first flow path pipeline 34, a second flow path pipeline 35 and a flow path control unit 36. The first end of the first flow path pipeline 34 is used to connect the air, and the second end of the first flow path pipeline 34 is connected to the first port of the flow path control unit 36. The first end of the second flow path pipeline 35 is used to connect the cleaning liquid, and the second end of the second flow path pipeline 35 is connected to the second port of the flow path control unit 36. The third port of the flow path control unit 36 ​​is connected to the first port of the two-way pump 332, and the second port of the two-way pump 332 is connected to the buffer component 333. The flow path control unit 36 ​​is used to switchably connect the first port and the third port of the flow path control unit 36, or connect the second port and the third port of the flow path control unit 36.

[0088] Specifically, the flow control unit 36 ​​can directly adopt a three-way solenoid valve, or can be composed of multiple two-way solenoid valves. When the first port of the flow control unit 36 ​​is connected to the third port, the two-way pump 332 can extract the air on the first end of the first flow pipe 34 into the injection needle 331, so that when the multi-parameter probe 31 is in the cleaning pool 212, air is blown into the cleaning pool 212, and the cleaning liquid is stirred by bubbles to improve the cleaning effect. When the second port of the flow control unit 36 ​​is connected to the third port, the two-way pump 332 can extract the cleaning liquid on the first end of the second flow pipe 34 into the injection needle 331, so that when the multi-parameter probe 31 is in the cleaning pool 212, cleaning liquid is added to the cleaning pool 212, which is convenient for quick replacement of the cleaning liquid. Therefore, the stirring and cleaning mechanism 33 can not only achieve the mixing operation of the turbidity standard liquid and the stirring and cleaning operation, but also realize the blowing of air to strengthen the cleaning operation and the replenishment of the cleaning liquid. A two-way pump 332 can achieve multiple functions and meet multiple stirring and cleaning needs.

[0089] Preferably, the multi-parameter probe device 3 also includes a waste liquid pool 37, the first end of the first flow path pipe 34 is arranged above the waste liquid pool 37 and is spaced relative to the waste liquid pool 37, the first flow path pipe 34 is used to suck air into the injection needle 331 through the two-way pump 332 and blow it out, and the first flow path pipe 34 is also used to suck the liquid at the injection needle 331 into the waste liquid pool 37 through the two-way pump 332.

[0090] By arranging the first end of the first flow path pipe 34 above the waste liquid pool 37 and at a distance from the waste liquid pool 37, the two-way pump 332 can suck air into the injection needle 331 and blow it out when sucking along the first end of the first flow path pipe 34 toward the second end, and the two-way pump 332 can suck liquid at the injection needle 331 into the waste liquid pool 37 when sucking along the second end of the first flow path pipe 34 toward the first end, so that the used or contaminated cleaning liquid in the cleaning pool 212 can be drawn into the waste liquid pool 37, thereby realizing automatic replacement operation of the cleaning liquid and avoiding cross contamination.

[0091] Furthermore, the waste liquid pool 37 is provided with a sealing cover (not shown in the figure, the same below) and a cover opening drive mechanism connected to the sealing cover and used to drive the sealing cover to open and close relative to the waste liquid pool 37. By providing a sealing cover that can be opened and closed automatically on the waste liquid pool 37, the waste liquid pool 37 can be sealed in time to prevent the air above the waste liquid pool 37 from being contaminated by the waste liquid, so that the two-way pump 332 can draw fresh air through the first flow path pipe 34.

[0092] Furthermore, the multi-parameter probe device 3 also includes a flow meter 351 arranged on the second flow path pipeline 35. The flow meter 351 can specifically adopt a pulse flow meter to accurately detect the liquid flow passing through the second flow pipeline 35, facilitate the metering of the cleaning liquid, and avoid insufficient or excessive addition of the cleaning liquid.

[0093] Preferably, the multi-parameter probe device 3 further includes an ultrasonic cleaning rod 38, and a plurality of detection electrodes 311 are arranged around the ultrasonic cleaning rod 38. The ultrasonic cleaning rod 38 is used to clean the detection electrodes 311 in the cleaning tank 212 by ultrasonic action to enhance the cleaning effect, and because the injection needle 331 can blow air into the cleaning tank 212, the cavitation effect of the ultrasonic wave is enhanced, further improving the cleaning effect.

[0094] Preferably, the lifting mechanism 32 includes a lifting seat 321 and a lifting component connected to the lifting seat 321 and used to drive the lifting seat 321 to move up and down. The lifting component can specifically adopt a gas rod or a hydraulic rod, or a motor with a screw nut assembly. A plurality of detection electrodes 311 are respectively installed on the lifting seat 321 and move synchronously with the lifting seat 321. The buffer component 333 is installed in the lifting seat 321 and connected to the injection needle 331 through a linear pipe.

[0095] Since the injection needle 331 is fixedly arranged relative to the lifting seat 321, when the lifting seat 321 moves up and down, it is convenient for the two-way pump 332 to accurately suck, thereby ensuring the stirring and cleaning effects.

[0096] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A rotating nozzle flushing device, characterized in that: The invention comprises a rotating spray head assembly (41), a liquid inlet pipe (42) and a stopper assembly (43), wherein the liquid inlet pipe (42) is connected to the rotating spray head assembly (41) and is used to provide cleaning liquid to the rotating spray head assembly (41), the liquid inlet pipe (42) is horizontally arranged above the rotating spray head assembly (41), and the stopper assembly (43) is installed on the liquid inlet pipe (42); The rotating spray head assembly (41) comprises a rotating shaft (411) and at least one spray head rod (412) arranged along the circumference of the rotating shaft (411), and a plurality of spray heads (413) arranged on the spray head rod (412) along the length direction of the spray head rod (412), wherein the spray head rod (412) is arranged to extend radially along the rotating shaft (411), and the spray heads (413) are arranged to be inclined relative to the vertical direction on the same side of the spray head rod (412), and the spray heads (413) are used to spray cleaning liquid and drive the spray head rod (412) to rotate along the rotating shaft (411) through the reaction force when spraying the cleaning liquid; The limiting assembly (43) comprises an elastic limiting portion (431) extending in a direction toward the nozzle rod (412), the elastic limiting portion (431) being used to elastically abut against the nozzle rod (412), the force exerted by the elastic limiting portion (431) on the nozzle rod (412) being smaller than the force exerted by the nozzle (413) to drive the nozzle rod (412) to rotate, so that when the nozzle (413) drives the nozzle rod (412) to rotate, the elastic limiting portion (431) can be pushed away by the nozzle rod (412), and when the nozzle (413) stops spraying the cleaning liquid, the elastic limiting portion (431) can be elastically reset and the nozzle rod (412) can be limited and fixed.

2. The rotary nozzle flushing device according to claim 1, characterized in that: The liquid inlet pipe (42) is provided with an anti-slip segment (421), and the limiting component (43) is sleeved on the anti-slip segment (421) and extends in a direction toward the spray head rod (412) to form the elastic limiting portion (431).

3. The rotary nozzle flushing device according to claim 2, characterized in that: The anti-slip segment (421) is configured as an external hexagonal structure.

4. The rotary nozzle flushing device according to claim 1, characterized in that: The limiting assembly (43) further comprises a collar portion (432) sleeved on the liquid inlet pipe (42); the elastic limiting portion (431) is connected to the collar portion (432) and the length of the elastic limiting portion (431) extending relative to the collar portion (432) is adjustable.

5. The rotary nozzle flushing device according to claim 1, characterized in that: The distance between the abutment position of the elastic limiting portion (431) on the nozzle rod (412) and the rotating shaft (411) is 50% to 80% of the total length of the nozzle rod (412).

6. The rotary nozzle flushing device according to claim 1, characterized in that: There are three spray head rods (412), and the three spray head rods (412) are arranged equidistantly along the circumference of the rotating shaft (411), so that the angle between two adjacent spray head rods (412) is 120 degrees.

7. The rotary nozzle flushing device according to claim 1, characterized in that: A plurality of the limiting components (43) are arranged at intervals along the length direction of the liquid inlet pipe (42), and the elastic limiting parts (431) of the plurality of limiting components (43) are respectively used to elastically abut against different positions of the spray head rod (412).

8. A water quality testing device, characterized in that: It comprises a rotating nozzle flushing device as claimed in any one of claims 1 to 7, as well as a water sample box (1) and a multi-parameter probe device (3); The water sample box (1) comprises a water sample chamber and an opening formed on the top of the water sample chamber; The multi-parameter probe device (3) is mounted above the water sample box (1), and comprises a multi-parameter probe (31) and a lifting mechanism (32) connected to the multi-parameter probe (31) and used to drive the multi-parameter probe (31) to move upward and downward; The rotating nozzle assembly (41) is mounted at the opening of the water sample box (1), the liquid inlet pipe (42) is offset relative to the bottom of the multi-parameter probe (31), and the elastic limiting portion (431) is used to limit the nozzle rod (412) to a state away from the bottom of the multi-parameter probe (31).

9. The water quality testing device according to claim 8, characterized in that: The water quality testing device further comprises a multi-station turntable device (2), wherein the multi-station turntable device (2) is mounted between the water sample box (1) and the multi-parameter probe device (3), wherein the multi-station turntable device (2) comprises a sample tray (21) and a rotating mechanism (22) connected to the sample tray (21), wherein a testing station and a plurality of standard sample stations are arranged circumferentially on the upper surface of the sample tray (21), wherein a first testing hole (211) for communicating with the opening is provided on the testing station, and a standard sample bottle group (213) for containing standard samples is provided on the standard sample station, and the rotating mechanism (22) is used to drive the sample tray (21) to rotate and to rotate the testing station or the standard sample station to be directly below the multi-parameter probe (31).

10. The water quality testing device according to claim 9, characterized in that: The multi-parameter probe (31) comprises a plurality of detection electrodes (311), wherein one detection electrode (311) is a turbidity electrode; The multi-parameter probe device (3) further comprises a stirring and cleaning mechanism (33), the stirring and cleaning mechanism (33) comprising an injection needle (331) arranged on the turbidity electrode and a two-way pump (332) connected to the injection needle (331), and a buffer component (333) arranged between the two-way pump (332) and the injection needle (331), the two-way pump (332) being used to draw liquid at the injection needle (331) into the buffer component (333), and the two-way pump (332) being also used to discharge the liquid in the buffer component (333) along the injection needle (331).

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