Interlocking titration water conservancy project water body pollution detection device

Abstract

The invention relates to the technical field of water quality detection, in particular to a water conservancy project water body pollution detection device with interlocking titration, a locking structure comprises an elastic traction kit arranged on a support, and the elastic traction kit is fixedly connected with an ejector rod; the locking block is fixedly connected with the elastic traction suite; the lantern ring is rotationally connected with the bracket, and the treatment test tube is detachably mounted on the lantern ring; the follow-up rotating part is coaxially and fixedly connected with the rotating shaft of the lantern ring, a locking groove is formed in the follow-up rotating part, and the locking groove is matched with the locking block, so that the treatment agent can be obliquely guided into the treatment test tube, splashing of the treatment agent in the dropwise adding process is prevented, and the reagent dropwise adding precision and the detection precision are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of water quality detection, and particularly relates to a water conservancy project water body pollution detection device with interlocking titration. BACKGROUND

[0002] In the process of daily water quality inspection and pollution source tracking of water conservancy projects, the water body must be quickly pretreated after sampling to mask heavy metal complexing agents, oxidizing agents, residual chlorine and irrelevant components such as suspended particles, so as to avoid cross interference on subsequent spectral, electrochemical or colorimetric detection.

[0003] The existing automatic pretreatment platform generally adopts a 'turntable-test tube-coaxial titration' mode. Specifically, a stepper motor drives a cross bracket to rotate, and each processing test tube is sequentially stopped below a fixed type dropping device. A lifting mechanism is used to vertically insert a dropping tube into the test tube opening, and coaxial positioning is used to ensure that the reagent falls into the geometric center.

[0004] However, in order to prevent the dropping tube from being contaminated, the equipment must leave a safe air gap when dropping the processing liquid, resulting in a suspended drop difference of several to more than ten millimeters between the dropping opening and the liquid surface. When high-concentration acid, alkali or organic extractant freely falls at a speed of several drops per second, the transient shock wave formed by the impact of the liquid drop on the gas-liquid interface can induce splashing, and part of the reagent beads rebound and adhere to the upper part of the inner wall of the test tube, which cannot participate in the target reaction, resulting in incomplete pretreatment of the water body and affecting the subsequent detection accuracy. SUMMARY

[0005] The application aims to provide a water conservancy project water body pollution detection device with interlocking titration to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the application provides the following technical scheme. A water conservancy project water body pollution detection device with interlocking titration comprises: A rack is provided with a driving structure and a bracket, and the driving structure can drive the bracket to rotate. A plurality of processing test tubes are circumferentially and equidistantly installed on the bracket. A locking structure is arranged on the bracket, and the locking structure can lock or unlock the rotating shaft of the processing test tube. A lifting assembly is arranged on the bracket, and a sample dropping device is rotatably connected to the action end of the lifting assembly. The lifting assembly and a top rod connected to the locking structure cooperate to switch the rotating shaft of the processing test tube from the locked state to the unlocked state. An elastic retaining assembly is connected to the lifting assembly and the sample dropping device, and the elastic retaining assembly can keep the sample dropping device in a vertical state. A deflection structure is connected to the support and the sample dropping device, and can drive the sample dropping device and the processing test tube to deflect when the sample dropping device enters the processing test tube.

[0007] The driving structure comprises a driving device fixedly installed on the frame and a hollow pipe rotatably installed through the frame, and the hollow pipe is coaxially fixedly connected with the support; The driving structure further comprises a first gear coaxially fixedly connected with the rotating shaft of the driving device and a second gear coaxially fixedly connected with the hollow pipe, and the second gear is engaged with the first gear.

[0008] The locking structure comprises: An elastic traction set is fixedly connected with the top rod and arranged on the support; A locking block is fixedly connected with the elastic traction set; A sleeve ring is rotatably connected with the support, and the processing test tube is detachably installed on the sleeve ring; A follow-up rotating member is coaxially fixedly connected with the rotating shaft of the sleeve ring, and a locking groove is arranged on the follow-up rotating member and adapted to the locking block.

[0009] The elastic traction set comprises a lifting frame slidably installed on the support, the lifting frame is connected with the top rod and the locking block, and a guide block is arranged on the inner wall of the lifting frame and slidably connected with a limiting groove arranged on the side of the support; The elastic traction set further comprises a first cylindrical spring connected with the support and the lifting frame.

[0010] The lifting assembly comprises a central shaft fixedly installed on the frame and a sliding sleeve plate slidably installed on the central shaft, and the central shaft penetrates through the hollow pipe; An electric telescopic rod is fixedly installed on the central shaft, and the action end of the electric telescopic rod is fixedly connected with the sliding sleeve plate; The end of the sliding sleeve plate, which is away from the electric telescopic rod, is rotatably connected with the sample dropping device.

[0011] The central shaft is provided with a groove along the length direction thereof, and a protrusion is arranged on the inner wall of the sliding sleeve plate and slidably matched with the groove.

[0012] The interlocking titration water conservancy water body pollution detection device as described above: the elastic retaining assembly includes a follow-up deflection plate fixedly connected with the rotating shaft of the sample dropping device and a convex shaft fixedly installed on the sliding cover plate, and the follow-up deflection plate is in abutment with the convex shaft. The elastic retaining assembly further includes an elastic traction structure connecting the sliding cover plate and the sample dropping device, and the elastic traction structure can keep the follow-up deflection plate in abutment with the convex shaft.

[0013] The interlocking titration water conservancy water body pollution detection device as described above: the elastic traction structure includes a first extension plate arranged on the sample dropping device, a second columnar spring is rotatably installed on the first extension plate, and one end of the second columnar spring away from the first extension plate is rotatably connected with the lower end of the sliding cover plate.

[0014] The interlocking titration water conservancy water body pollution detection device as described above: the second extension plate is rotatably installed with an abutment shaft. The deflection structure further includes a support portion connected with the support, and a support plane is arranged on the support portion, and the support plane is in abutment with the abutment shaft.

[0015] Compared with the prior art, the beneficial effects of the present application are: During the downward movement of the sample dropping device, the rotating shaft of the treatment test tube can be first unlocked, so that the treatment test tube can perform a reverse deflection action when the sample dropping device deflects. Secondly, when the dropping tube of the sample dropping device enters the treatment test tube, the sample dropping device can deflect, and when the dropping tube acts on the upper part of the rotating shaft of the treatment test tube, the treatment test tube is driven to rotate in reverse, so that when the sample dropping device adds treatment liquid to the treatment test tube, the treatment liquid can flow along the side wall of the treatment test tube to the water body, thereby avoiding the situation that the treatment liquid splashes or the splashed droplets adhere to the inner wall of the treatment test tube, ensuring that the quality of the treatment liquid added to the water body reaches the preset quality, improving the pretreatment effect on the water body, and ensuring the subsequent detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the interlocking titration water conservancy water body pollution detection device.

[0017] Figure 2 It is Figure 1 It is a structural enlarged view of A in the middle.

[0018] Figure 3 It is a structural schematic view of another angle of the interlocking titration water conservancy water body pollution detection device.

[0019] Figure 4It is a structure diagram of hollow pipe and center shaft in the water conservancy project water body pollution detection device of interlocking titration.

[0020] Figure 5 It is a structure diagram of bracket, sleeve ring and support part in the water conservancy project water body pollution detection device of interlocking titration.

[0021] Figure 6 It is a structure diagram of locking structure in the water conservancy project water body pollution detection device of interlocking titration.

[0022] Figure 7 It is an explosion view of locking structure in the water conservancy project water body pollution detection device of interlocking titration.

[0023] Figure 8 It is a structure diagram of elastic retaining assembly in the water conservancy project water body pollution detection device of interlocking titration.

[0024] Figure 9 It is a structure diagram of elastic retaining assembly in the water conservancy project water body pollution detection device of interlocking titration.

[0025] In the figure: 1, rack; 2, driving device; 3, first gear; 4, second gear; 5, hollow pipe; 6, bracket; 601, limiting groove; 7, sleeve ring; 8, follow-up rotating part; 801, locking groove; 9, support part; 901, support plane; 10, processing test tube; 11, electric control valve; 12, lifting frame; 1201, guide block; 1202, top rod; 13, locking block; 14, first cylindrical spring; 15, center shaft; 1501, groove; 16, electric telescopic rod; 17, sliding sleeve plate; 1701, protrusion; 18, sample dropping device; 1801, first extension plate; 1802, second extension plate; 19, second cylindrical spring; 20, abutting shaft; 21, follow-up deflection plate; 22, convex shaft. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0027] Please refer to Figures 1-9 As an embodiment of the present application, the water conservancy project water body pollution detection device of interlocking titration comprises a rack 1, a processing test tube 10, a locking structure, a lifting assembly, an elastic retaining assembly and a deflection structure.

[0028] The rack 1 is provided with a driving structure and a support 6, the driving structure can drive the support 6 to rotate, the driving structure comprises a driving device 2 fixedly installed on the rack 1 and a hollow pipe 5 rotationally installed through the rack 1, the hollow pipe 5 is coaxially fixedly connected with the support 6; The driving structure further comprises a first gear 3 coaxially fixedly connected with the rotating shaft of the driving device 2 and a second gear 4 coaxially fixedly connected with the hollow pipe 5, the second gear 4 is engaged with the first gear 3.

[0029] In the embodiment, the driving device 2 is a stepping motor, and the support 6 is a cross-shaped structure, four groups of processing test tubes 10 are installed on the support 6, in this state, the driving device 2 can drive the support 6 to rotate 90° each time, specifically: In use, the water body to be detected is poured into one of the processing test tubes 10, then the driving device 2 works to drive the first gear 3 connected therewith to rotate, and the first gear 3 is in engagement with the second gear 4, so that the second gear 4 drives the hollow pipe 5 to rotate, thereby driving the support 6 to rotate, so as to realize the position switching of the processing test tube 10, so that the water body to be detected can be sequentially injected into each processing test tube 10, realizing continuous detection.

[0030] Further, the circumferential radius of the first gear 3 is smaller than that of the second gear 4, thereby achieving the effect of deceleration, and under this effect, the driving error of the driving device 2 can be reduced, so that the angle of the processing test tube 10 in the circumferential motion is more controllable and the error is smaller in the case that the driving device 2 has driving error, which ensures that the processing test tube 10 can be more coaxial with the sample dropping device 18 after the position switching is completed, preventing misalignment of the two to cause the processing liquid to be unable to accurately enter the processing test tube 10 when the sample dropping device 18 drops the processing liquid.

[0031] Please refer to Figure 2 、 Figures 6-7 , the processing test tube 10 is provided with multiple groups and is rotationally installed on the support 6 at equal intervals, the bottom of the processing test tube 10 is provided with an electric control valve 11, through the electric control valve 11, the water body can be timely discharged from the processing test tube 10 when the water body is completed in the pre-treatment, and after the processing test tube 10 is pressurized and the cleaning liquid is delivered, the cleaning liquid can be discharged from the electric control valve 11 after completing the cleaning of the processing test tube 10, thereby realizing the cleaning of the processing test tube 10, preventing the water body or the processing liquid from remaining in the processing test tube 10, and improving the subsequent detection accuracy.

[0032] The locking structure is arranged on the support 6, the locking structure can lock or unlock the rotating shaft of the processing test tube 10, the locking structure comprises: An elastic traction assembly is arranged on the bracket 6, and the elastic traction assembly is fixedly connected with the top rod 1202. The elastic traction assembly comprises a lifting frame 12 which is slidingly arranged on the bracket 6. The lifting frame 12 is connected with the top rod 1202 and a locking block 13. A guide block 1201 is arranged on the inner wall of the lifting frame 12, and the guide block 1201 is slidingly connected with a limiting groove 601 arranged on the side of the bracket 6. The elastic traction assembly further comprises a first cylindrical spring 14 which connects the bracket 6 and the lifting frame 12. The locking block 13 is fixedly connected with the lifting frame 12. The sleeve ring 7 is rotationally connected with the bracket 6. The processing test tube 10 is detachably arranged on the sleeve ring 7. The follow-up rotating member 8 is coaxially fixedly connected with the rotation shaft of the sleeve ring 7. The follow-up rotating member 8 is provided with a locking groove 801 which is matched with the locking block 13.

[0033] In the initial state, the first cylindrical spring 14 is in a stretched state. Under the action of the first cylindrical spring 14, the lifting frame 12 has a tendency to move upward. Under this tendency, the locking block 13 can act in the locking groove 801, so that the rotation shaft of the processing test tube 10 can be locked. In this way, the swing of the processing test tube 10 during the rotation of the bracket 6 can be prevented, so that the subsequent processing liquid cannot be added.

[0034] Further, in the case that the rotation shaft of the processing test tube 10 is not locked, the rotation of the bracket 6 will inevitably cause the processing test tube 10 to swing. In order to improve the accuracy of adding the processing liquid, it is necessary to wait for the processing test tube 10 to change from the swing state to the static state, that is, additional waiting time is needed. In the embodiment, the rotation shaft of the processing test tube 10 is locked, so that the above-mentioned waiting time is not needed, which shortens the pre-processing period to a certain extent.

[0035] Further, when the lifting assembly acts on the top rod 1202, the lifting frame 12 can move downward. At this time, the locking block 13 can move with the lifting frame 12, so that the locking block 13 can be separated from the locking groove 801, that is, the rotation shaft of the processing test tube 10 is unlocked. At this time, when the sample adding device 18 rotates and abuts against the upper part of the rotation shaft of the processing test tube 10 at the end, the processing test tube 10 can be rotated, so that the inclined addition of the processing liquid is realized, and the splashing phenomenon of the processing liquid during the addition of the processing liquid is prevented.

[0036] Please refer to Figure 1 , Figure 4The lifting assembly is arranged on the support 6, a sample dropping device 18 is rotatably connected to the action end of the lifting assembly, and the lifting assembly cooperates with the top rod 1202 connected with the locking structure, so that the rotating shaft of the processing test tube 10 can be switched from the locked state to the unlocked state. The lifting assembly comprises a center shaft 15 fixedly installed on the rack 1 and a sliding sleeve plate 17 slidably installed on the center shaft 15, and the center shaft 15 penetrates the hollow tube 5. The center shaft 15 is fixedly installed with an electric telescopic rod 16, and the action end of the electric telescopic rod 16 is fixedly connected with the sliding sleeve plate 17. The end of the sliding sleeve plate 17 away from the electric telescopic rod 16 is rotatably connected with the sample dropping device 18, the center shaft 15 is provided with a groove 1501 along the length direction thereof, and the inner wall of the sliding sleeve plate 17 is provided with a protrusion 1701, and the protrusion 1701 and the groove 1501 are in sliding cooperation.

[0037] In this embodiment, the electric telescopic rod 16 can drive the sliding sleeve plate 17 to move along the length direction of the center shaft 15, so that the sliding sleeve plate 17 realizes lifting, and in this process, the sliding sleeve plate 17 drives the sample dropping device 18 to perform lifting action, so that the sample dropping device 18 can be inserted into the inside of the processing test tube 10, and the accuracy of the processing liquid dropping is improved.

[0038] Wherein, under the cooperation of the protrusion 1701 and the groove 1501, the sliding sleeve plate 17 and the center shaft 15 can realize axial self-locking, which can effectively prevent the sliding sleeve plate 17 from rotating relative to the center shaft 15, so that the position state of the sample dropping device 18 relative to the rack 1 is more stable, and the sliding sleeve plate 17 is prevented from rotating relative to the center shaft 15 during lifting, so that the sample dropping device 18 is misaligned with the processing test tube 10 after position switching, and the accuracy of the processing liquid dropping is further ensured.

[0039] Please refer to Figures 6-9 The elastic retaining assembly is connected with the lifting assembly and the sample dropping device 18, the elastic retaining assembly can keep the sample dropping device 18 in a vertical state, the elastic retaining assembly comprises a follow-up deflection plate 21 fixedly connected with the rotating shaft of the sample dropping device 18 and a convex shaft 22 fixedly installed on the sliding sleeve plate 17, and the follow-up deflection plate 21 and the convex shaft 22 are in abutting cooperation. The elastic holding assembly further comprises an elastic traction structure connecting the sliding cover plate 17 and the sample dropping device 18, which can keep the follow-up deflection plate 21 in abutment with the convex shaft 22, and the elastic traction structure comprises a first extension plate 1801 arranged on the sample dropping device 18, a second columnar spring 19 being rotatably arranged on the first extension plate 1801, and the second columnar spring 19 being rotatably connected with the lower end of the sliding cover plate 17 at the end away from the first extension plate 1801.

[0040] In the initial state, the second columnar spring 19 is in a stretched state, and the second columnar spring 19 has a tendency to pull the sample dropping device 18 to rotate relative to the sliding cover plate 17, but in this state, the follow-up deflection plate 21 is in abutment with the convex shaft 22, so that the sample dropping device 18 can be kept stable in this state, and the dropping tube of the sample dropping device 18 is in a vertical state, so that when the sample dropping device 18 follows the sliding cover plate 17 to move towards the processing test tube 10, the sample dropping device 18 can more accurately enter the processing test tube 10, preventing the sample dropping device 18 from being in an inclined state, causing the dropping tube to fail to enter the processing test tube 10 and interference between the dropping tube and the processing test tube 10.

[0041] The deflection structure connects the bracket 6 and the sample dropping device 18, and can drive the sample dropping device 18 and the processing test tube 10 to deflect after the sample dropping device 18 enters the processing test tube 10, and the deflection structure comprises a second extension plate 1802 arranged on the sample dropping device 18, and an abutment shaft 20 being rotatably arranged on the second extension plate 1802. The deflection structure further comprises a support portion 9 connected with the bracket 6, and the support portion 9 is provided with a support plane 901 abutting with the abutment shaft 20.

[0042] In the initial state, the sample dropping device 18 is in a vertical state, and as the sliding cover plate 17 descends, the sliding cover plate 17 will first abut against the top rod 1202 to drive the lifting frame 12 to move by the top rod 1202, at this time, the locking block 13 will move away from the locking groove 801 to unlock the rotating shaft of the processing test tube 10, and then the sliding cover plate 17 will continue to descend, and when the dropping pipe at the lower end of the sliding cover plate 17 enters the processing test tube 10, the abutment shaft 20 will also abut against the supporting plane 901, so that the abutment shaft 20 can drive the sample dropping device 18 to deflect in the process of cooperating with the supporting plane 901, and since the dropping pipe of the sample dropping device 18 is inside the processing test tube 10, at this time, when the dropping pipe acts on the processing test tube 10, it can drive the processing test tube 10 to deflect in the opposite direction, and the end of the dropping pipe abuts against the inner wall of the processing test tube 10, in this state, when the sample dropping device 18 drops the processing liquid into the processing test tube 10, the processing liquid can flow along the side wall of the processing test tube 10 and finally enter the water body, thereby avoiding the phenomenon that the processing liquid splashes when it touches the water body due to the suspended dropping of the processing liquid, thereby avoiding that the processing liquid splashes outside the processing test tube 10 or adheres to the side wall of the processing test tube 10 without effectively reacting with the water body, and improving the processing effect of the processing liquid on the water body.

[0043] It should be noted that during the deflection of the sample dropping device 18, the lower end of the dropping pipe is always located above the rotating shaft of the processing test tube 10, thereby ensuring that the processing test tube 10 can perform a reverse deflection action when the sample dropping device 18 deflects.

[0044] Based on the above arrangement, during the downward movement of the sample dropping device 18, the rotating shaft of the processing test tube 10 can be first unlocked to ensure that the processing test tube 10 can perform a reverse deflection action when the sample dropping device 18 deflects, and secondly, the sample dropping device 18 can deflect when the dropping pipe enters the processing test tube 10, and drive the processing test tube 10 to rotate in the opposite direction when the dropping pipe acts on the upper part of the rotating shaft of the processing test tube 10, so that the processing liquid can flow along the side wall of the processing test tube 10 to the water body when the sample dropping device 18 adds the processing liquid into the processing test tube 10, thereby avoiding the splashing of the processing liquid or the adhesion of the splashed droplets on the inner wall of the processing test tube 10, ensuring that the quality of the processing liquid added into the water body reaches the preset quality, and improving the pretreatment effect on the water body.

[0045] It will be obvious to a person skilled in the art that the application is not limited to the details of the foregoing exemplary embodiments and can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims to the identity of the reference signs therein.

[0046] Furthermore, it should be understood that although the description is made on the basis of the embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. An interlocked titration water conservancy water body pollution detection device, characterized in that, The utility model relates to a kind of automatic sample processing device, including: Rack, which is provided with driving structure and support, the driving structure can drive the support to rotate; Processing test tube, which is provided with multiple groups and is installed on the support in equal distance rotation; Locking structure, which is provided on the support, the locking structure can lock or unlock the rotation axis of the processing test tube; Lifting assembly, which is provided on the support, the action end of the lifting assembly is rotatably connected with sample dropping device, and the lifting assembly cooperates with the top rod connected with the locking structure, so that the rotation axis of the processing test tube can be switched from the locked state to the unlocked state; Elastic retaining assembly, which is connected with the lifting assembly and sample dropping device, the elastic retaining assembly can keep the sample dropping device in vertical state; Deflection structure, which is connected with the support and sample dropping device, when sample dropping device enters the processing test tube, the deflection structure can drive the sample dropping device and processing test tube to deflect.

2. The water pollution detection device for hydraulic engineering according to claim 1, wherein The driving structure includes driving device fixedly installed on the rack and hollow tube rotatably installed through the rack, and the hollow tube is coaxially fixedly connected with the support; The driving structure further includes first gear coaxially fixedly connected with the rotation axis of the driving device and second gear coaxially fixedly connected with the hollow tube, and the second gear is engaged with the first gear.

3. The water pollution detection device for hydraulic engineering according to claim 1, wherein The locking structure includes: Elastic traction set provided on the support, which is fixedly connected with the top rod; Locking block fixedly connected with the elastic traction set; Sleeve ring rotatably connected with the support, and the processing test tube is detachably installed on the sleeve ring; Cooperative rotating member coaxially fixedly connected with the rotation axis of the sleeve ring, which is provided with locking groove, and the locking groove is matched with the locking block.

4. The water pollution detection device for hydraulic engineering according to claim 3, wherein The elastic traction set includes lifting frame slidably installed on the support, which is connected with the top rod and locking block, and the inner wall of the lifting frame is provided with guide block, which is slidably connected with limiting groove provided on the side of the support; The elastic traction set further includes first cylindrical spring connected with the support and the lifting frame.

5. The water pollution detection device for hydraulic engineering water body according to claim 2, characterized in that, The lifting assembly includes central shaft fixedly installed on the rack and sliding sleeve plate slidably installed on the central shaft, and the central shaft penetrates the hollow tube; The central shaft is fixedly installed with electric telescopic rod, and the action end of the electric telescopic rod is fixedly connected with the sliding sleeve plate; The end of the sliding sleeve plate away from the electric telescopic rod is rotatably connected with the sample dropping device.

6. The water pollution detection device for hydraulic engineering water body according to claim 5, wherein, The central shaft is provided with groove along its length direction, and the inner wall of the sliding sleeve plate is provided with protrusion, which is slidably matched with the groove.

7. The water pollution detection device according to claim 5, wherein, The elastic retaining assembly includes cooperative deflection plate fixedly connected with the rotation axis of the sample dropping device and convex shaft fixedly installed on the sliding sleeve plate, and the cooperative deflection plate is abutted and matched with the convex shaft; The elastic retaining assembly further includes elastic traction structure connected with the sliding sleeve plate and sample dropping device, which can keep the cooperative deflection plate and the convex shaft in abutting state.

8. The water pollution detection device according to claim 7, wherein, The elastic traction structure comprises a first extension plate arranged on the sample dropping device, a second cylindrical spring is rotatably arranged on the first extension plate, and one end of the second cylindrical spring away from the first extension plate is rotatably connected with the lower end of the sliding sleeve plate.

9. The water pollution detection device according to claim 1, wherein The deflection structure comprises a second extension plate arranged on the sample dropping device, and an abutting shaft is rotatably arranged on the second extension plate. The deflection structure further comprises a support part connected with the support, and a support plane is arranged on the support part, and the support plane is abuttingly matched with the abutting shaft.

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