A water bath nitrogen blowing device

Abstract

This invention relates to the field of laboratory analytical instrument technology, specifically to a water bath nitrogen blowing device, comprising a water bath nitrogen blowing instrument, a drain pipe fixedly connected to one end of the drain pipe, and a wastewater tank fixedly connected to one end of the drain pipe. A protrusion is fixedly installed inside the wastewater tank, and the protrusion has multiple sets of first straight grooves, inclined grooves, and second straight grooves. A hydraulic rod is installed at the upper end of the wastewater tank, and a fixed box is installed at the power output end of the hydraulic rod. Multiple sample collection tubes are installed inside the fixed box for sampling wastewater. Each sample collection tube has a sliding sealing rod slidably connected inside, and a sliding ball is fixedly connected to one end of the sliding sealing rod. The sliding ball is slidably connected to each of the first straight groove, inclined groove, and second straight groove. This device can automatically sample wastewater at different depths when sampling and testing is required.

Description

Technical Field

[0001] This invention relates to the field of laboratory analytical instrument technology, specifically a water bath nitrogen blowing device. Background Technology

[0002] A water bath nitrogen purging system is a widely used laboratory device for sample pretreatment. Its core principle combines the gentle, uniform heating of a constant-temperature water bath with the inertial purging of high-purity nitrogen. By vertically blowing nitrogen onto the surface of the heated sample, the partial pressure of the solvent surface is reduced, accelerating evaporation while isolating oxygen to prevent sample oxidation, thus achieving rapid, oxygen-free concentration. This device typically consists of a water bath, a rotatable and height-adjustable sample rack, and an independently controlled gas distribution system. It boasts advantages such as high temperature control accuracy, low nitrogen consumption, and ease of operation, and can process multiple samples simultaneously, significantly shortening analysis time. As a key supporting device for liquid chromatography, gas chromatography, and mass spectrometry analysis in fields such as pesticide residue analysis, environmental monitoring, pharmaceutical testing, bioanalysis, and food and beverage testing, it can efficiently concentrate liquid samples to a set volume or near-dry state, providing high-concentration, non-oxidized samples for subsequent accurate analysis. It is an indispensable and efficient sample preparation tool in modern laboratories.

[0003] The wastewater in the existing equipment's wastewater tank will naturally stratify due to differences in solvent density. When sampling is required to investigate pollutants or classify and treat them, it is necessary to specifically sample the wastewater in the deeper parts, which requires multiple samplings and causes inconvenience to the operators. Summary of the Invention

[0004] The purpose of this invention is to provide a water bath nitrogen blowing device to solve the problem mentioned in the background art where the wastewater in the wastewater tank of the equipment naturally separates due to different solvent densities. When sampling is required to investigate pollutants or classify and treat them, it is necessary to specifically sample the wastewater in the deeper parts, which requires multiple samplings and causes inconvenience to the operators.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a water bath nitrogen blowing device, including a water bath nitrogen blowing instrument, a drain pipe fixedly connected to the water bath nitrogen blowing instrument, a wastewater tank fixedly connected to one end of the drain pipe, a protruding block fixedly installed inside the wastewater tank, and multiple sets of first straight sliding grooves, inclined sliding grooves and second straight sliding grooves opened on the protruding block; A hydraulic rod is installed at the upper end of the wastewater tank. A fixed box is installed at the power output end of the hydraulic rod. Multiple sample collection tubes are installed inside the fixed box. The sample collection tubes are used to sample the wastewater. A sliding sealing rod is slidably connected inside each sample collection tube. A sliding ball is fixedly connected to one end of the sliding sealing rod. The sliding ball is slidably connected to each of the first straight slide groove, the inclined slide groove, and the second straight slide groove.

[0006] Furthermore, one end of each sample collection tube is connected to a pipe, a pipette is installed inside the fixing box, multiple pipettes are fixedly connected to the pipette, and an expansion tube is provided in the middle section of the pipette.

[0007] Furthermore, a fixing pipe is fixedly connected to one side of the fixing box, and a water inlet pipe is provided at the center of the fixing pipe.

[0008] Furthermore, a sliding disc is slidably connected inside the fixed box, a fixed rod is fixedly connected to one side of the sliding disc, a sealing disc is fixedly connected to one end of the fixed rod, the sealing disc is slidably connected to the inside of the straw, and a return spring is provided on one side of the sliding disc, with one end of the return spring abutting against the inside of the fixed box.

[0009] Furthermore, a push plate is provided on one side of the sliding disc, the push plate is slidably connected to the interior of the fixed box, a water inlet hole is provided at the center of the push plate, and a movable sealing plate is rotatably connected to the water inlet hole.

[0010] Furthermore, a limiting groove is provided inside the fixed pipe, and a sealing plate is slidably connected inside the limiting groove. One end of the sealing plate is provided with an inclined surface. The sealing plate is used to block the water inlet pipe, and a sliding column is fixedly connected to one side of the sealing plate.

[0011] Furthermore, a control slide plate is slidably connected to one side of the sealing plate. The control slide plate is located inside the fixed box. The control slide plate is provided with a guide straight slide groove and a guide oblique slide groove. The guide straight slide groove and the guide oblique slide groove are fixedly connected. The sliding column is slidably connected to the guide straight slide groove and the guide oblique slide groove.

[0012] Furthermore, a fixed rack is fixedly connected inside the fixed box, and a first gear is meshed with one side of the fixed rack. The first gear is rotatably connected to a protrusion on the sliding disc.

[0013] Furthermore, a first rack is meshed with one side of the first gear, and one end of the first rack is fixedly connected to a protrusion on the control slide plate.

[0014] Furthermore, one end of the fixed rack is meshed with a second gear, the second gear meshes with the first rack, one side of the first rack is slidably connected to a second rack, the second rack meshes with the second gear, and one side of the second rack is fixedly connected to a protrusion on the push plate.

[0015] The technical solution provided by this invention has the following advantages compared with the known prior art: I. This invention utilizes the cooperation of inclined sliding grooves at different heights on the protruding block with the second straight sliding groove. When the hydraulic rod drives the fixed box downward, the sliding ball can trigger the sliding sealing rod at different depths to generate negative pressure. This negative pressure draws wastewater from a specific water layer into the corresponding sample collection tube through the pipeline, avoiding the mixing of liquids at different depths and ensuring the accuracy and representativeness of the test data. II. The present invention uses a gear and rack transmission mechanism to fix the rack, first gear, second gear, first rack, and second rack in a coordinated manner. When the sealing plate moves to generate negative pressure for sample suction, the sealing plate will automatically move down to block the water inlet pipe and stop water intake. At the same time, the second rack drives the push plate to push the sample in the fixed tube into the suction tube. The mechanism of first blocking and then pushing reduces sample residue and reduces cross-contamination between samples at different depths. Third, this invention uses a snap-fit ​​design between the sample collection tube and the fixing box, and takes advantage of the straight up-and-down characteristics of the second straight sliding groove. After sampling is completed, the hydraulic rod moves upward, and the sliding ball can slide directly along the second straight sliding groove out of the protrusion, so that the collection tube can easily break free from the restriction. There is no need for manual insertion into the wastewater tank to retrieve it. Combined with the self-locking function of the one-way valve, it not only avoids sample leakage, but also greatly reduces the labor intensity of operators and the risk of contact with wastewater. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic cross-sectional view of the wastewater tank of the present invention; Figure 3 This is a schematic diagram of the fixing box structure of the present invention; Figure 4 This is a schematic cross-sectional view of the protrusion block structure of the present invention; Figure 5 This is a cross-sectional view of the fixing box structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the internal structure of the fixing box of the present invention; Figure 8 This is a schematic cross-sectional view of the fixed tube structure of the present invention; Figure 9 This is a schematic diagram of the sliding column structure of the present invention; Figure 10 This is a schematic cross-sectional view of the top of the fixing box of the present invention.

[0018] In the diagram: 1. Water bath nitrogen blower; 2. Drain pipe; 3. Wastewater tank; 4. Protrusion; 5. First straight chute; 6. Inclined chute; 7. Second straight chute; 8. Hydraulic rod; 9. Fixing box; 10. Sample collection tube; 11. Sliding sealing rod; 12. Sliding ball; 13. Pipe; 14. Pipe; 15. Outer expansion tube; 16. Fixing tube; 17. Water inlet pipe; 18. Sliding disc; 19. Fixing rod; 20. Sealing disc; 21. Return spring; 22. Pushing disc; 23. Water inlet; 24. Movable sealing disc; 25. Restricting chute; 26. Sealing plate; 27. Inclined surface; 28. Sliding column; 29. ​​Control slide plate; 30. Guide straight chute; 31. Guide inclined chute; 32. Fixing rack; 33. First gear; 34. First rack; 35. Second gear; 36. Second rack. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example: A water bath nitrogen blowing device, such as Figures 1-10 As shown, the device includes a water bath nitrogen evaporator 1, with a drain pipe 2 fixedly connected to the water bath nitrogen evaporator 1. One end of the drain pipe 2 is fixedly connected to a wastewater tank 3. It should be noted that the wastewater tank 3 is integrated with the water bath nitrogen evaporator 1. The water bath nitrogen evaporator 1 is existing technology, and its specific working principle will not be elaborated in detail. A protrusion 4 is fixedly installed inside the wastewater tank 3. The protrusion 4 has multiple sets of first straight sliding grooves 5, inclined sliding grooves 6, and second straight sliding grooves 7. See [link to documentation]. Figure 4 The height of the inclined slide 6 is different, decreasing from top to bottom, while the second straight slide 7 is a straight through groove. A hydraulic rod 8 is installed at the upper end of the wastewater tank 3. A fixing box 9 is installed at the power output end of the hydraulic rod 8. Multiple sample collection tubes 10 are installed inside the fixing box 9. It should be noted that the sample collection tubes 10 and the fixing box 9 are designed to be snapped together. The fixing box 9 can be opened, and then the sample collection tubes 10 can be taken out from the fixing box 9. The sample collection tubes 10 are used to sample wastewater. Through the design of multiple sample collection tubes 10, wastewater at different depths can be collected. A sliding sealing rod 11 is slidably connected inside each sample collection tube 10. A sliding ball 12 is fixedly connected to one end of the sliding sealing rod 11. The sliding ball 12 is slidably connected to each of the first straight slide groove 5, the inclined slide groove 6, and the second straight slide groove 7. It should be noted that the sliding ball 12 can slide out from the end of the first straight slide groove 5, which facilitates the removal of the collection tube 10.

[0022] One end of each sample collection tube 10 is connected to a pipe 13. It should be noted that each sample collection tube 10 and pipe 13 is equipped with a one-way valve that allows water to enter the sample collection tube 10 but not exit it. The fixed box 9 is equipped with a pipette 14. Multiple pipes 13 are fixedly connected to the pipette 14. The middle section of the pipette 14 is equipped with an expansion tube 15.

[0023] A fixing tube 16 is fixedly connected to one side of the fixing box 9. A water inlet pipe 17 is set at the center of the fixing tube 16. The design of the water inlet pipe 17 makes it possible for the sliding ball 12 to generate negative pressure when it slides in the sample collection tube 10. This negative pressure is transmitted to the water inlet pipe 17 through the pipe 13 and the pipette 14, so that the wastewater can be sucked into the sample collection tube 10.

[0024] A sliding disc 18 is slidably connected inside the fixed tube 16. A fixed rod 19 is fixedly connected to one side of the sliding disc 18. A sealing disc 20 is fixedly connected to one end of the fixed rod 19. The sealing disc 20 is slidably connected to the inside of the straw 14. An inclined surface is provided at the junction of the straw 14 and the outer expansion tube 15 to prevent the sealing disc 20 from getting stuck when it is reset. A reset spring 21 is provided on one side of the sliding disc 18. The reset spring 21 can drive the sliding disc 18, the fixed rod 19 and the sealing disc 20 to reset. One end of the reset spring 21 abuts against the inside of the fixed box 9. The design of the sliding disc 18 can limit the position of the fixed rod 19 and the sealing disc 20 to prevent positional deviation during the sliding process.

[0025] A push plate 22 is provided on one side of the sliding disc 18. The push plate 22 is slidably connected to the interior of the fixed box 9. A water inlet hole 23 is opened at the center of the push plate 22. A movable sealing plate 24 is rotatably connected to the water inlet hole 23. The design of the water inlet hole 23 and the movable sealing plate 24 prevents clogging when water is drawn into the interior. See Figure 8The fixed tube 16 has a groove inside, located below the sliding disc 18. At the same time, the push disc 22 has a protrusion that slides in the groove. With this design, after the sample flows into the fixed tube 16, it can flow into the pipette 14 under the action of the groove, preventing the sliding disc 18 from blocking the sample. At the same time, the protrusion below the push disc 22 can push the sample in the groove to flow towards the pipette 14.

[0026] The fixed box 9 has a limiting groove 25 inside, and a sealing plate 26 is slidably connected inside the limiting groove 25. By opening the limiting groove 25, the position of the sealing plate 26 can be limited, so that the sealing plate 26 can slide within a predetermined trajectory to prevent deviation. One end of the sealing plate 26 has an inclined surface 27. The sealing plate 26 is used to block the water inlet pipe 17. By opening the inclined surface 27, the sealing plate 26 is prevented from getting stuck when blocking the water inlet pipe 17. A sliding column 28 is fixedly connected to one side of the sealing plate 26.

[0027] A control slide plate 29 is slidably connected to one side of the sealing plate 26. The control slide plate 29 is located inside the fixed box 9. The control slide plate 29 is provided with a guide straight slide groove 30 and a guide oblique slide groove 31. The guide straight slide groove 30 and the guide oblique slide groove 31 are fixedly connected. It should be noted that one end of the guide oblique slide groove 31 is provided with a straight slide groove. The sliding column 28 is slidably connected to the guide straight slide groove 30 and the guide oblique slide groove 31. By opening the guide straight slide groove 30 and the guide oblique slide groove 31, the position of the sliding column 28 can be restricted, so that when the sliding column 28 slides in the guide oblique slide groove 31, it can drive the sliding column 28 and the sealing plate 26 to slide down together.

[0028] The fixed box 9 is internally fixedly connected to a fixed rack 32. A first gear 33 is meshed with one side of the fixed rack 32. The first gear 33 is rotatably connected to a protrusion on the sliding disc 18. With this design, when the sliding disc 18 slides, it can drive the first gear 33 to move together.

[0029] The first gear 33 is meshed with a first rack 34 on one side. One end of the first rack 34 is fixedly connected to a protrusion on the control slide plate 29. This design allows the control slide plate 29 to slide together when the first rack 34 slides.

[0030] One end of the fixed rack 32 is meshed with a second gear 35, which meshes with the first rack 34. A second rack 36 is slidably connected to one side of the first rack 34. It should be noted that the first rack 34 and the second rack 36 are slidably connected to the interior of the fixed box 9. The interior of the fixed box 9 has grooves for restricting the positions of the first rack 34 and the second rack 36, preventing displacement during sliding. The first rack 34 and the second rack 36 are horizontally parallel and slidingly connected. The second rack 36 meshes with the second gear 35. One side of 6 is fixedly connected to the protrusion on the push disk 22. Through the design of the second gear 35 meshing with the first rack 34 and the second rack 36, the subsequent sliding disk 18 can drive the first gear 33 to rotate under the action of the fixed rack 32 when pushing the first gear 33 to slide. At the same time, the first gear 33 rotates and drives the first rack 34 to slide. The first rack 34 slides and drives the second gear 35 to rotate. The second gear 35 rotates and pushes the second rack 36, so that the second rack 36 can slide. Through this design, the stroke of the second rack 36 is greater than the stroke of the first rack 34.

[0031] During operation, the water bath nitrogen evaporator 1 generates wastewater containing various substances. This wastewater is transported to the wastewater tank 3 through the drain pipe 2. The wastewater is collected in the wastewater tank 3. When the wastewater tank 3 is nearly full, the wastewater needs to be tested to determine the appropriate treatment method. When sampling of the wastewater in the wastewater tank 3 is required, the hydraulic rod 8 is activated. The hydraulic rod 8 drives the fixed box 9 to slide to the bottom of the wastewater tank 3. As the fixed box 9 slides downward, it also drives the sliding ball 12 downward. Figure 4 When one of the sliding balls 12 slides to the inclined groove 6, the inclined groove 6 guides the sliding ball 12, causing it to slide to the left. Simultaneously, the sliding ball 12 slides to the left, causing the sliding sealing rod 11 to slide as well, creating a negative pressure inside the sample collection tube 10. The sample is then adsorbed through the pipe 13 and the pipette 14. Figure 7At this time, the sealing disc 20 inside the straw 14 slides to the left. Simultaneously, the sealing disc 20 generates an adsorption force within the fixed tube 16 and at the inlet pipe 17, allowing wastewater to enter the fixed tube 16 through the inlet pipe 17. As the sealing disc 20 slides to the left, it also drives the fixed rod 19 and the sliding disc 18 to slide to the left, causing the first rack 34 to slide to the left as well. Simultaneously, the first rack 34 drives the control slide plate 29 to slide. At this time, the sliding column 28 slides within the guide straight slide groove 30. The design of the guide straight slide groove 30 prevents the sealing plate 26 from sliding downwards under the action of the guide inclined slide groove 31, thus affecting the sample inflow. When the sample flows into the fixed tube 16, it pushes open the movable sealing disc 24, allowing the sample to flow between the sliding disc 18 and the pushing disc 22. At this time, the sliding ball 12 is in the inclined slide groove... The sealing disc 20 slides within the straw 14. It should be noted that multiple independent sliding groove units are arranged side by side along the horizontal direction on the protrusion 4. Each sliding groove unit is composed of a first straight groove 5, an inclined groove 6, and a second straight groove 7 connected in sequence. The multiple sliding groove units are independent of each other on the protrusion 4 and do not intersect. Multiple sliding balls 12 are also arranged side by side along the horizontal direction. Each sliding ball 12 corresponds to a set of sliding groove units and slides only within its own sliding groove unit. It will not enter other sets of sliding grooves. The entrances of each set of sliding groove units are staggered and the paths are independent, ensuring that when the sliding ball goes down, it can only enter the first straight groove 5 of the corresponding set, and then enter the inclined groove 6 and the second straight groove 7 in sequence. There will be no cross-groove or mutual interference, so that only one sliding ball is located in the inclined groove 6 at the same time, and only one sliding ball 12 slides in the inclined groove 6 at the same time.

[0032] At this time, the sealing plate 20 will continue to slide to the left, which will continue to drive the first rack 34 to slide to the left, and at the same time drive the control slide plate 29 to slide together. At this time, the sliding column 28 slides in the guide inclined slide groove 31. Through this design, the sealing plate 26 can seal the water inlet pipe 17 to prevent excess sample from entering the fixed pipe 16. At this time, the sliding sealing rod 11 will continue to slide in the sample collection tube 10, and will continue to generate negative pressure. As the pusher plate 22 slides to the left, the movable sealing plate 24 will be in close contact with the water inlet 23, which can prevent the sample from flowing to the other side of the pusher plate 22 and push more sample into the pipette 14 as much as possible, reducing the impact on subsequent deeper samples. At this time, the sliding column 28 has slid into the straight groove of the guide inclined slide 31. Through the design of the straight groove of the guide inclined slide 31, after the subsequent water inlet pipe 17 is blocked, the pusher plate 22 can continue to slide with the second rack 36, so that the pusher plate 22 can continue to push the sample into the pipette 14. It should be noted that the first rack 34 and the second rack 36 are designed to slide side by side. The width of the second gear 35 is sufficient to mesh with both the first rack 34 and the second rack 36 simultaneously. When the first gear 33 slides to the left, it will rotate under the action of the fixed rack 32. At the same time, the rotation of the first gear 33 drives the first rack 34 to slide to the left. The sliding of the first rack 34 to the left will drive the second gear 35 to rotate together. While rotating, the second gear 35 will move to the left under the action of the fixed rack 32. When the second gear 35 moves to the left, it will drive the second rack 36 to move to the left together. At the same time, the rotation of the second gear 35 can drive the second rack 36 again. Through this design, the stroke of the second rack 36 is greater than the stroke of the first rack 34, so that the second rack 36 can drive the pusher 22 to one side of the sliding disk 18, so that the sample in the fixed tube 16 can be pushed to the pipette 14.

[0033] When the pushing disk 22 slides to one side of the sliding disk 18, the sealing disk 20 has opened the seal on the suction tube 14 and has slid into the outer expansion tube 15, so that the sample in the fixed tube 16 can be drawn into the sample collection tube 10. It should be noted that the moment when the sealing disk 20 leaves the suction tube 14 and enters the outer expansion tube 15 is mechanically limited by the groove stroke of the inclined slide 6 and the moving stroke of the sliding sealing rod 11. When the sliding ball 12 descends to the preset position of the inclined slide 6, the sealing disk 20 moves into the outer expansion tube 15 to open the passage, forming a precise timing coordination with the sealing plate 26 sealing and the pushing action of the pushing disk 22. This timing is guaranteed by the structure. At the same time, the sliding ball 12 will continue to slide under the guidance of the inclined slide 6 to achieve uninterrupted adsorption. The sealing disk 20 will not slide back into the suction tube 14 under the action of the return spring 21. When the sealing disc 20 slides into the expansion tube 15, with the cooperation of the fixed rack 32, the first gear 33, the first rack 34, the second gear 35, and the second rack 36, the second rack 36 slides the pushing disc 22 to one side of the sliding disc 18. As the pushing disc 22 slides to the left, it pushes the sample in the fixed tube 16 into the pipette 14 and the expansion tube 15. This design prevents the sample from continuing to enter the fixed tube 16 and pushes the sample in the fixed tube 16 into the pipette 14, preventing it from affecting the sample in the deeper layers. Even if there is residual sample in the fixed tube 16, it will not affect the sample in the deeper layers. At this time, the sliding ball 12 will continue to slide in the inclined groove 6. Guided by the inclined groove 6, the sliding ball 12 will pull the sliding sealing rod 11 to continue sliding in the sample collection tube 10, so that the sample collection tube 10 will continue to generate negative pressure, so that the sample can enter the sample collection tube 10 through the pipe 13, pipette 14 and expansion tube 15. When the sliding ball 12 slides to the junction of the inclined groove 6 and the second straight groove 7, the sliding ball 12 will no longer drive the sliding sealing rod 11 to slide in the sample collection tube 10. At this time, the sample collection has been completed. When the sample collection tube 10 no longer generates adsorption force through the pipe 13 and the pipette 14, the sliding disc 18, the fixing rod 19, and the sealing disc 20 will slide to the right under the action of the reset spring 21. At the same time, the inclined surface at the junction of the pipette 14 and the expansion tube 15 can guide the pipette 14 and prevent the sealing disc 20 from getting stuck during reset. While the sliding disc 18 and the sealing disc 20 slide to the right, they will drive the guide straight slide groove 30 to slide together. While the guide straight slide groove 30 slides, it will drive the control slide plate 29 to slide together. Under the guidance of the guide inclined slide groove 31, the sealing plate 26 will slide upward, so that the sealing plate 26 can open the seal on the water inlet pipe 17. At the same time, under the action of the second rack 36, the push disc 22 will be driven to return to the initial position, preparing for the collection of samples from deeper layers. At this time, the hydraulic rod 8 will continue to push the fixed box 9 to slide down. When another sliding ball 12 slides into the next inclined slide groove 6, a sample at that depth will be collected. When the sliding ball 12 slides to a deeper layer, another sliding ball 12 will slide into the inclined slide groove 6, and so on, to complete the collection of samples at different depths.

[0034] After sample collection is completed, the hydraulic rod 8 will pull the fixing box 9 upward. At the same time, after the samples at different depths are collected, the sliding ball 12 will slide from the inclined slide groove 6 into the second straight slide groove 7. When the fixing box 9 drives each sliding ball 12 to slide upward, the sliding ball 12 will slide directly along the second straight slide groove 7 to the top of the protrusion 4 and slide out. Then, each sample collection tube 10 is taken out, and samples at different depths are tested to determine the subsequent processing method. It should be noted that when the sliding ball 12 slides to the junction of the second straight slide groove 7 and the inclined slide groove 6 during the upward sliding process, the position of the sliding ball 12 is fixed and will not slide to the right.

[0035] In this embodiment: the hydraulic rod 8 drives the fixed box 9 downward, causing the sliding ball 12 at the bottom of the sliding sealing rod 11 in each sample collection tube 10 to slide along the inclined grooves 6 on the protrusion 4 in the wastewater tank 3; the displacement of the sliding ball 12 causes the sliding sealing rod 11 to move and generate negative pressure, which draws wastewater of the corresponding depth into the sample collection tube 10 through the pipe 13. At the same time, the negative pressure is transmitted to the fixed tube 16 through the suction pipe 14, pulling the sealing disc 20 and the sliding disc 18 to move to the left and compressing the return spring 21; the sliding disc 18 is linked by the gear transmission mechanism of the fixed rack 32, the first gear 33, the second gear 35, the first rack 34, and the second rack 36, on the one hand, by controlling the sliding plate 2 The guide sloping groove 31 on the 9 drives the sealing plate 26 to move down and block the water inlet pipe 17 to stop the water inlet. On the other hand, the second rack 36 drives the push plate 22 to push the residual sample in the fixed tube 16 into the pipette 14 to reduce the contamination of the deep sample. When the sliding ball 12 slides into the second straight sloping groove 7, it completes single-point sampling. When it slides to different depths, the corresponding sliding ball 12 will cooperate with the corresponding sloping groove 6 to complete the collection of samples at different depths. When the hydraulic rod 8 moves up to reset, the sliding ball 12 slides out of the protrusion 4 along the second straight sloping groove 7, which makes it easy to take out the sample collection tube 10 for layer detection, thereby realizing automatic sampling, residue prevention and convenient removal of wastewater at different depths.

[0036] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water bath nitrogen blowing device, comprising a water bath nitrogen blowing instrument (1), wherein a drain pipe (2) is fixedly connected to the water bath nitrogen blowing instrument (1), and a wastewater tank (3) is fixedly connected to one end of the drain pipe (2), characterized in that: The wastewater tank (3) is fixedly installed with a protrusion (4), and the protrusion (4) has multiple sets of first straight slide groove (5), inclined slide groove (6) and second straight slide groove (7). A hydraulic rod (8) is installed at the upper end of the wastewater tank (3). A fixed box (9) is installed at the power output end of the hydraulic rod (8). Multiple sample collection tubes (10) are installed inside the fixed box (9). The sample collection tubes (10) are used to sample wastewater. A sliding sealing rod (11) is slidably connected inside each sample collection tube (10). A sliding ball (12) is fixedly connected to one end of the sliding sealing rod (11). The sliding ball (12) is slidably connected to each of the first straight groove (5), the inclined groove (6), and the second straight groove (7).

2. The water bath nitrogen blowing device according to claim 1, characterized in that: One end of each sample collection tube (10) is connected to a pipe (13), and a pipette (14) is provided inside the fixing box (9). Multiple pipettes (13) are fixedly connected to the pipette (14), and an expansion tube (15) is provided in the middle section of the pipette (14).

3. The water bath nitrogen blowing device according to claim 2, characterized in that: A fixing pipe (16) is fixedly connected to one side of the fixing box (9), and a water inlet pipe (17) is provided at the center of the fixing pipe (16).

4. The water bath nitrogen blowing device according to claim 3, characterized in that: The fixed box (9) is slidably connected to a sliding disc (18). A fixed rod (19) is fixedly connected to one side of the sliding disc (18). A sealing disc (20) is fixedly connected to one end of the fixed rod (19). The sealing disc (20) is slidably connected to the inside of the straw (14). A return spring (21) is provided on one side of the sliding disc (18). One end of the return spring (21) abuts against the inside of the fixed box (9).

5. The water bath nitrogen blowing device according to claim 4, characterized in that: A push plate (22) is provided on one side of the sliding disc (18). The push plate (22) is slidably connected to the inside of the fixed box (9). A water inlet hole (23) is provided at the center of the push plate (22). A movable sealing plate (24) is rotatably connected to the water inlet hole (23).

6. The water bath nitrogen blowing device according to claim 5, characterized in that: The fixed pipe (16) has a limiting groove (25) inside, and a sealing plate (26) is slidably connected inside the limiting groove (25). One end of the sealing plate (26) has an inclined surface (27). The sealing plate (26) is used to block the water inlet pipe (17). A sliding column (28) is fixedly connected to one side of the sealing plate (26).

7. The water bath nitrogen blowing device according to claim 6, characterized in that: A control slide plate (29) is slidably connected to one side of the sealing plate (26). The control slide plate (29) is located inside the fixed box (9). A guide straight slide groove (30) and a guide oblique slide groove (31) are provided on the control slide plate (29). The guide straight slide groove (30) and the guide oblique slide groove (31) are fixedly connected. The sliding column (28) is slidably connected to the guide straight slide groove (30) and the guide oblique slide groove (31).

8. A water bath nitrogen blowing device according to claim 7, characterized in that: The fixed box (9) is fixedly connected to a fixed rack (32), and a first gear (33) is meshed with one side of the fixed rack (32). The first gear (33) is rotatably connected to a protrusion on the sliding disc (18).

9. A water bath nitrogen blowing device according to claim 8, characterized in that: The first gear (33) is meshed with a first rack (34) on one side, and one end of the first rack (34) is fixedly connected to a protrusion on the control slide plate (29).

10. The water bath nitrogen blowing device according to claim 9, characterized in that: One end of the fixed rack (32) is meshed with a second gear (35), the second gear (35) is meshed with the first rack (34), a second rack (36) is slidably connected to one side of the first rack (34), the second rack (36) is meshed with the second gear (35), and one side of the second rack (36) is fixedly connected to a protrusion on the push disk (22).

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