Automatic stratified water sampling device and method

Abstract

The present invention relates to the technical field of water sampling. Disclosed in the present invention are an automatic stratified water sampling device and method. The device comprises sampling boxes, wherein a plurality of the sampling boxes are fixedly connected by means of connecting assemblies; a partition plate is fixedly arranged in each sampling box; a sliding stop block is arranged in a matching manner at the position of the inner side of the sampling box corresponding to the position of a water intake hole; a water intake channel is arranged in the sliding stop block; a water intake pipe is arranged in a communicating manner at the position of the bottom end of the sliding stop block corresponding to the position of one end of the water intake channel; a connecting tube is fixedly arranged on each sampling box; and a sampling mechanism which facilitates the movement of the sliding stop block is arranged inside the connecting tube. In the present invention, fixed frames are symmetrically arranged at the upper end of each sampling box, and a plurality of limiting sliding rods are arranged at the bottom end of each sampling box, thereby facilitating fixed connection of the plurality of the sampling boxes; and under the action of a sliding plate, a push rod, a second rack, a gear and a first rack, the sliding stop block moves in the length direction of a guide sliding groove, thereby automatically completing water sampling.

Description

An automated water stratification sampling device and method Technical Field

[0001] This invention relates to the field of water sampling technology, specifically an automated water stratification sampling device and method. Background Technology

[0002] Water sampling is a crucial part of water quality monitoring, requiring the accurate extraction of water samples from specific times and locations. When sampling deep water, it is often necessary to sample at multiple depths according to a depth gradient. Currently, when performing stratified sampling, a water sampling container is typically lowered to a designated depth. The container is equipped with a one-way opening and closing cover, which is opened during lowering and closed during lifting to achieve the sampling work. This sampling method can only collect samples from one depth at a time, and stratified sampling requires lowering the container multiple times, resulting in low sampling efficiency.

[0003] Chinese patent CN115326491B discloses a stratified water sampler for water environment testing. This sampler has several snap-fit ​​components on a vertical pipe, and each snap-fit ​​component is equipped with a water sampling container. By placing the water sampling container in the water and pulling the handle, several flip-tops open simultaneously, and the air pump is turned on at the same time to take samples. However, when using the above sampler, the sampling depth is limited by the length of the vertical pipe, making it difficult to sample deeper water. In addition, the sampling process requires manual pulling of the handle, which makes it inconvenient to achieve automatic sampling.

[0004] Based on this, an automated water stratification sampling device and method are provided, which can eliminate the drawbacks of existing devices. Technical issues

[0005] The purpose of this invention is to provide an automated water stratification sampling device and method to solve the problems in the prior art of inconvenience in sampling deep water and inconvenience in automatic sampling. Technical solutions

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An automated water stratification sampling device includes sampling boxes, several of which are fixedly connected by connecting components. Each sampling box has a fixed lifting ring at its upper end. A partition is fixedly installed inside each sampling box, and the bottom end of the partition and the bottom of the sampling box together form a water storage chamber. A drain pipe is connected to one side of the bottom of each sampling box, and an electromagnetic valve is fitted onto the drain pipe. A water inlet is located on one side of each sampling box. A sliding stop is fitted onto the inner side of the sampling box at a position corresponding to the water inlet, with one side of the sliding stop in close contact with the inner side of the sampling box. Guide grooves are slidably provided on guide rods on both sides of the sliding stop, and the guide grooves are fixedly installed inside the sampling box. A water inlet channel is provided inside the sliding stop, and a water inlet pipe is connected to the bottom end of the sliding stop at a position corresponding to one end of the water inlet channel. The water inlet pipe is slidably positioned within a circular perforation at the upper end of the partition. A connecting pipe is fixedly installed on the sampling box, and a sampling mechanism is provided inside the connecting pipe to facilitate the movement of the sliding stop.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one alternative embodiment: the connecting assembly includes a fixing frame, and the upper end of each sampling box is symmetrically provided with a fixing frame. The fixing frame is U-shaped, and the upper inner side of the fixing frame is symmetrically provided with a limiting slide rod. The limiting slide rod is slidably disposed in a rectangular through hole on one side of the fixing tube. The fixing tube is fixedly disposed at the bottom end of the sampling box, and the bottom end of the limiting slide rod is fixedly provided with a mounting plate. A return spring is fixedly disposed between one side of the mounting plate and one side inside the fixing tube.

[0010] In one alternative: the two limiting slides on the same side are both fitted onto a connecting frame.

[0011] In one alternative embodiment: the sampling mechanism includes a first rack, which is fixedly mounted on one side of a sliding stop. A gear is fitted on the first rack, and the two ends of the gear are rotatably mounted in the mounting groove inside the sampling box. A second rack is fitted on the gear and fixedly mounted on the upper end of a push rod. A sliding plate is fixedly mounted on one end of the push rod and slidably mounted inside a connecting pipe. One end of the sliding plate is fixedly connected to one end of an adjusting spring, and the other end of the adjusting spring is fixedly connected to one side of an adjusting plate. The adjusting plate is slidably mounted inside the connecting pipe. A threaded rod is fitted in a threaded hole on one side of the adjusting plate. One end of the threaded rod has an external thread and rotatably mounted in the mounting groove on one side of the sampling box. An exhaust pipe is connected to the inside of the water storage chamber, and a one-way valve is fitted on the exhaust pipe.

[0012] In one alternative: a scale is fixedly provided on one side of the adjustment plate, and the scale has several graduation values.

[0013] In one alternative: a float is provided inside the sampling box, the float is fixedly mounted on one end of a sliding column, a sliding support plate is slidably mounted on the sliding column, the sliding support plate is fixedly mounted inside the sampling box, a push plate is fixedly mounted on the other end of the sliding column, and a mounting hole is provided at the upper end of the partition plate corresponding to the position of the push plate, and a button pressure sensor is fixedly mounted in the mounting hole.

[0014] In one alternative: a filter screen is fixedly installed inside the water inlet hole of the sampling box.

[0015] In one alternative: a counterweight is provided at the bottom of the lowest sampling box, and a fixing frame is symmetrically provided at the upper end of the counterweight. Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] This invention features symmetrically arranged fixing frames at the top of the sampling box and several limiting sliding rods at the bottom, facilitating the fixed connection of multiple sampling boxes and allowing for the addition or reduction of the number of sampling boxes according to usage needs. This enhances the practicality of the water stratification sampling device. A sliding stop block with a water inlet channel is slidably installed inside the sampling box. The sliding stop block moves along the length of the guide groove under the action of a sliding plate, push rod, second rack, gear, and first rack, enabling automatic water sampling. When the water pressure exceeds the set spring force of the connecting pipe, the water inlet channel extends beyond the inlet hole, preventing water from continuing to enter the storage chamber. A threaded rod and adjusting plate allow for adjustment of the spring force when sampling water at different depths. A float and button pressure sensor provide notification that sampling inside the storage chamber is complete, thus facilitating the practical use of the water stratification sampling device. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of the present invention.

[0019] Figure 2 is a schematic diagram of the installation of the one-way valve of the present invention.

[0020] Figure 3 is a schematic diagram of the internal structure of the sampling box of the present invention.

[0021] Figure 4 is a schematic diagram of the sliding stop structure of the present invention.

[0022] Figure 5 is a schematic diagram of the internal structure of the connecting pipe of the present invention.

[0023] Figure 6 is a schematic diagram of the limiting slide bar structure of the present invention.

[0024] Figure label annotations: 11 Sampling box, 12 Sliding stop, 13 Inlet pipe, 14 Exhaust pipe, 15 One-way valve, 16 Filter screen, 17 Drain pipe, 18 Solenoid valve, 19 First rack, 20 Gear, 21 Second rack, 22 Push rod, 23 Sliding plate, 24 Connecting pipe, 25 Threaded rod, 26 Adjusting plate, 27 Adjusting spring, 28 Scale, 29 Float, 30 Button pressure sensor, 31 Fixing bracket, 32 Limiting slide bar, 33 Connecting bracket, 34 Return spring, 35 Counterweight, 36 Lifting ring. Embodiments of the present invention

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example

[0026] In one embodiment, as shown in Figures 1-6, an automated water stratification sampling device includes sampling boxes 11. Several sampling boxes 11 are fixedly connected by connecting components. Each sampling box 11 has a hanging ring 36 fixedly mounted on its upper end. A partition is fixedly mounted inside each sampling box 11, and the bottom end of the partition and the bottom end of the sampling box 11's interior combine to form a water storage chamber. A drain pipe 17 is connected to one side of the bottom end of each sampling box 11, and a solenoid valve 18 is fitted onto the drain pipe 17. A water inlet is provided on one side of each sampling box 11, and a sliding stop 12 is fitted onto the inner side of each sampling box 11 at a position corresponding to the water inlet. 2 One side is in close contact with the inner side of the sampling box 11. Guide groove rods are slidably provided on both sides of the guide rod of the sliding block 12. The guide groove rods are fixedly provided inside the sampling box 11. A water inlet channel is provided inside the sliding block 12. A water inlet pipe 13 is connected to the bottom end of the sliding block 12 at one end of the water inlet channel. The water inlet pipe 13 is slidably provided in the circular through hole at the upper end of the partition. A connecting pipe 24 is fixedly provided on the sampling box 11. A sampling mechanism is provided inside the connecting pipe 24 to facilitate the movement of the sliding block 12. The sampling mechanism facilitates the movement of the sliding block 12, so that one end of the water inlet channel coincides with the water inlet hole.

[0027] The connecting assembly includes a fixing frame 31. Each sampling box 11 has a symmetrically arranged fixing frame 31 on its upper end. The fixing frame 31 is U-shaped. A limiting slide rod 32 is symmetrically arranged on the upper inner side of each fixing frame 31. The limiting slide rod 32 slides within a rectangular through hole on one side of a fixing tube. The fixing tube is fixed to the bottom end of the sampling box 11. A mounting plate is fixed to the bottom end of the limiting slide rod 32. A return spring 34 is fixed between one side of the mounting plate and the inside of the fixing tube. In use, when it is necessary to connect several sampling boxes 11 together... Align the bottom limiting slide bar 32 of one sampling box 11 with the upper fixing frame 31 of the other sampling box 11. Then, make one end of the limiting slide bar 32 tightly against the upper end of the fixing frame 31. The bottom end of one end of the limiting slide bar 32 is arc-shaped, so that one end of the limiting slide bar 32 slides inside the fixing tube. When one end of the limiting slide bar 32 is disengaged from one side of the fixing frame 31, the limiting slide bar 32 slides to the initial position under the action of the return spring 34. At the same time, the upper end of the limiting slide bar 32 is tightly against the upper inner side of the fixing frame 31, thereby fixing the two sampling boxes 11 together.

[0028] Both of the limiting slide bars 32 on the same side are fitted onto a connecting frame 33. When it is necessary to disassemble the sampling box 11, pull the two connecting frames 33 so that several limiting slide bars 32 simultaneously disengage from the upper inner side of the fixing frame 31, thereby removing the sampling box 11.

[0029] The sampling mechanism includes a first rack 19, which is fixedly mounted on one side of the sliding stop 12. A gear 20 is fitted on the first rack 19, and the two ends of the gear 20 are rotatably mounted in the mounting groove inside the sampling box 11. A second rack 21 is fitted on the gear 20, and the second rack 21 is fixedly mounted on the upper end of the push rod 22. A sliding plate 23 is fixedly mounted on one end of the push rod 22, and the sliding plate 23 is slidably mounted inside the connecting pipe 24. One end of the sliding plate 23 is fixedly connected to one end of the adjusting spring 27. 7. The other end is fixedly connected to one side of the adjusting plate 26. The adjusting plate 26 is slidably disposed inside the connecting pipe 24. A threaded rod 25 is fitted in the threaded hole on one side of the adjusting plate 26. One end of the threaded rod 25 has an external thread, and the other end of the threaded rod 25 is rotatably disposed in the mounting groove on one side of the sampling box 11. An exhaust pipe 14 is connected to the inside of the water storage chamber. A one-way valve 15 is fitted on the exhaust pipe 14. In use, when it is necessary to perform stratified sampling of the water body, the upper end of the sampling box 11 at the top is connected to the external traction equipment via the lifting ring 36. Then, according to the sampling depth... As the threaded rod 25 rotates, the threaded rod 25 and the adjusting plate 26 move along the axis of the threaded rod 25 under the action of the thread, thereby adjusting the elastic force of the adjusting spring 27. Then, several sampling boxes 11 are slowly dropped into the water by an external traction device. When the dropping depth reaches a set distance of one sampling box 11, the sliding plate 23 slides inside the connecting pipe 24 under the action of water pressure. The sliding plate 23 pushes the second rack 21 to move through the push rod 22. The second rack 21 meshes with the gear 20, causing the gear 20 to... When the gear 20 rotates, it meshes with the first rack 19, causing the first rack 19 to drive the sliding stop 12 to move along the length of the guide groove rod. When one end of the water inlet channel coincides with the water inlet hole, the sliding plate 23 stops moving, and water enters the water storage chamber through the water inlet pipe 13. At the same time, the gas in the water storage chamber is discharged through the exhaust pipe 14. When the sampling box 11 continues to sink, the water pressure increases, and the sliding plate 23 continues to move, so that one end of the water inlet channel exceeds the position of the water inlet hole. The sliding stop 12 seals the water inlet hole, thereby preventing water of other depths from entering the water storage chamber.

[0030] A scale 28 is fixedly provided on one side of the adjustment plate 26. The scale 28 has several scale values. When in use, it is convenient to move the adjustment plate 26 by the scale 28 when adjusting the elastic force of the adjustment spring 27, and the scale values ​​are convenient to confirm the movement distance of the adjustment plate 26.

[0031] The sampling box 11 is equipped with a float 29, which is fixedly mounted on one end of a sliding column. A sliding support plate is slidably mounted on the sliding column and fixedly mounted inside the sampling box 11. A push plate is fixedly mounted on the other end of the sliding column. An installation hole is provided at the upper end of the partition plate corresponding to the position of the push plate. A button pressure sensor 30 is fixedly mounted in the installation hole. In use, when the water level inside the water storage chamber rises, the float 29 floats on the water surface inside the water storage chamber. When the water level inside the water storage chamber reaches the set height, the float 29 presses the button pressure sensor 30 through the sliding column and the push plate. The output end of the button pressure sensor 30 is electrically connected to an external control component, so that the staff can easily understand the liquid level inside the water storage chamber.

[0032] A filter plate 16 is fixedly installed inside the water inlet hole of the sampling box 11, which helps to reduce impurities from entering the water storage chamber when sampling water. Example

[0033] The difference from Embodiment 1 is that: a counterweight 35 is provided at the bottom of the sampling box 11 at the bottom. A fixing frame 31 is symmetrically provided at the upper end of the counterweight 35. In use, the counterweight 35 is installed at the bottom of the sampling box 11, and the fixing frame 31 is fixed by several limiting slide rods 32 at the bottom of the sampling box 11, thereby fixing the counterweight 35 and increasing the total amount of the sampling box 11 when sampling.

[0034] The above embodiment discloses an automated water stratification sampling device. When stratified water sampling is required, the bottom limiting slide rod 32 of one sampling box 11 is aligned with the upper fixing frame 31 of another sampling box 11. Then, one end of the limiting slide rod 32 is pressed tightly against the upper end of the fixing frame 31. The bottom end of one end of the limiting slide rod 32 is arc-shaped, allowing it to slide inside the fixing tube. When one end of the limiting slide rod 32 disengages from one side of the fixing frame 31, the return spring 34 causes the limiting slide rod 32 to slide to its initial position. Simultaneously, the upper end of the limiting slide rod 32 is pressed tightly against the upper inner side of the fixing frame 31, thus fixing the two sampling boxes 11 in place. This method is repeated to connect multiple sampling boxes 11. Together, the counterweight 35 is then installed at the bottom of the sampling box 11. Several limiting slide rods 32 at the bottom of the sampling box 11 are used to fix the fixing frame 31, thus securing the counterweight 35. The upper lifting ring 36 of the sampling box 11 at the top is connected to the external traction equipment. Then, depending on the sampling depth, the threaded rod 25 is rotated. Under the action of the thread, the adjusting plate 26 moves along the axis of the threaded rod 25, thereby adjusting the elasticity of the adjusting spring 27. Subsequently, several sampling boxes 11 are slowly lowered into the water using the external traction equipment. When the depth reaches a set distance for one sampling box 11, the sliding plate 23 moves under the water pressure. Sliding inside the connecting pipe 24, the sliding plate 23 pushes the second rack 21 to move via the push rod 22. The second rack 21 meshes with the gear 20, causing the gear 20 to rotate. The gear 20 meshes with the first rack 19, causing the first rack 19 to drive the sliding stop 12 to move along the length of the guide groove rod. When one end of the water inlet channel coincides with the water inlet hole, the sliding plate 23 stops moving, and water enters the water storage chamber through the water inlet pipe 13. At the same time, the gas in the water storage chamber is discharged through the exhaust pipe 14. When the water level in the water storage chamber rises, the float 29 floats on the water surface inside the water storage chamber. When the water level in the water storage chamber reaches the set height, the float 29 squeezes the button pressure sensor 30 through the sliding column and the push plate. The pressure sensor 30 is electrically connected to the external control component to remind the staff that the water sample collection in the water storage chamber is complete. Then, the external traction device continues to increase the depth of the sampling box 11. As the sampling box 11 continues to sink, the water pressure increases and the sliding plate 23 continues to move, so that one end of the water inlet channel exceeds the position of the water inlet hole. The sliding block 12 seals the water inlet hole to prevent water at other depths from entering the water storage chamber. After the sampling is completed, the sampling box 11 is taken out of the water. Then, the two connecting frames 33 are pulled, so that several limit sliding rods 32 simultaneously disengage from the upper inner side of the fixed frame 31, thereby removing the sampling box 11 and opening it through the solenoid valve 18 to discharge the water sample in the water storage chamber. Industrial applicability

[0035] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. An automated water stratification sampling device, comprising sampling boxes (11), wherein a plurality of sampling boxes (11) are fixedly connected by connecting components, and each sampling box (11) is fixedly provided with a lifting ring (36) at its upper end, characterized in that, The sampling box (11) is equipped with a partition plate inside. The bottom end of the partition plate and the bottom end of the sampling box (11) are combined to form a water storage chamber. A drain pipe (17) is connected to one side of the bottom end of the sampling box (11). An electromagnetic valve (18) is fitted on the drain pipe (17). A water inlet is provided on one side of the sampling box (11). A sliding stop (12) is fitted on the inner side of the sampling box (11) at the position corresponding to the water inlet. One side of the sliding stop (12) is in close contact with the inner side of the sampling box (11). (12) Guide groove rods are slidably provided on both sides of the guide rods. The guide groove rods are fixedly provided inside the sampling box (11). The sliding block (12) is provided with a water inlet channel. The bottom end of the sliding block (12) is connected to one end of the water inlet channel and a water inlet pipe (13) is provided. The water inlet pipe (13) is slidably provided in the circular perforation at the upper end of the partition. A connecting pipe (24) is fixedly provided on the sampling box (11). The connecting pipe (24) is provided with a sampling mechanism that facilitates the movement of the sliding block (12).

2. The automated water stratification sampling device according to claim 1, characterized in that, The connecting assembly includes a fixing frame (31). The upper end of the sampling box (11) is symmetrically provided with fixing frames (31). The fixing frames (31) are U-shaped. The upper inner side of the fixing frame (31) is symmetrically provided with limiting slide rods (32). The limiting slide rods (32) are slidably disposed in a rectangular through hole on one side of the fixing tube. The fixing tube is fixedly disposed at the bottom end of the sampling box (11). The bottom end of the limiting slide rods (32) is fixedly provided with an installation plate. A return spring (34) is fixedly disposed between one side of the installation plate and one side inside the fixing tube.

3. The automated water stratification sampling device according to claim 2, characterized in that, The two limiting slides (32) on the same side are both mounted on a connecting frame (33).

4. The automated water stratification sampling device according to claim 1, characterized in that, The sampling mechanism includes a first rack (19), which is fixedly mounted on one side of the sliding block (12). A gear (20) is fitted on the first rack (19). The two ends of the gear (20) are rotatably mounted in the mounting groove inside the sampling box (11). A second rack (21) is fitted on the gear (20). The second rack (21) is fixedly mounted on the upper end of the push rod (22). A sliding plate (23) is fixedly mounted on one end of the push rod (22). The sliding plate (23) is slidably mounted inside the connecting pipe (24). One end of the plate (23) is fixedly connected to one end of the adjusting spring (27), and the other end of the adjusting spring (27) is fixedly connected to one side of the adjusting plate (26). The adjusting plate (26) is slidably disposed inside the connecting pipe (24). A threaded rod (25) is fitted in the threaded hole on one side of the adjusting plate (26). One end of the threaded rod (25) is provided with an external thread. One end of the threaded rod (25) is rotatably disposed in the mounting groove on one side of the sampling box (11). An exhaust pipe (14) is connected to the inside of the water storage chamber. A one-way valve (15) is fitted on the exhaust pipe (14).

5. An automated water stratification sampling device according to claim 4, characterized in that, A scale (28) is fixedly provided on one side of the adjustment plate (26), and the scale (28) has several scale values.

6. The automated water stratification sampling device according to claim 1, characterized in that, The sampling box (11) is equipped with a float (29) inside. The float (29) is fixedly installed at one end of the sliding column. A sliding support plate is slidably installed on the sliding column. The sliding support plate is fixedly installed inside the sampling box (11). A push plate is fixedly installed at the other end of the sliding column. An installation hole is provided at the upper end of the partition plate corresponding to the position of the push plate. A button pressure sensor (30) is fixedly installed in the installation hole.

7. An automated water stratification sampling device according to claim 1, characterized in that, A filter screen plate (16) is fixedly installed inside the water inlet hole of the sampling box (11).

8. An automated water stratification sampling device according to claim 1, characterized in that, The bottom of the sampling box (11) at the bottom is provided with a counterweight (35), and the upper end of the counterweight (35) is symmetrically provided with a fixing frame (31).

9. A method of using an automated water stratification sampling device according to any one of claims 1-8, characterized in that, Includes the following steps; Step 1: By cooperating with the upper fixing frame (31) of one sampling box and several limiting slide rods (32) at the bottom of another sampling box (11), several sampling boxes (11) are connected together. The counterweight (35) is installed at the bottom of the sampling box (11) located at the bottom, and the upper lifting ring (36) of the sampling box (11) located at the top is connected to the external traction equipment. Step 2: Rotate the threaded rod (25) to adjust the elastic force of the adjusting spring (27), and slowly put several sampling boxes (11) into the water. When the depth reaches the set distance of a sampling box (11), the sliding plate (23) slides inside the connecting pipe (24) under the action of water pressure. The sliding plate (23) pushes the second rack (21) to move through the push rod (22). With the cooperation of the second rack (21), gear (20) and first rack (19), when one end of the water inlet channel coincides with the water inlet hole, water enters the water storage chamber through the water inlet pipe (13). At the same time, the gas in the water storage chamber is discharged through the exhaust pipe (14). After sampling is completed, the float (29) squeezes the button pressure sensor (30) through the sliding column and push plate. Step 3: After sampling is completed, the sampling box (11) is removed from the water. Then, the two connecting frames (33) are pulled so that several limiting slide bars (32) are simultaneously disengaged from the upper inner side of the fixed frame (31), thereby removing the sampling box (11) and opening it through the electromagnetic valve (18) to discharge the water sample inside the water storage chamber.

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