Sample reserving and automatic emptying device of automatic water sampler

Abstract

The utility model relates to the technical field of automatic water quality monitoring, in particular to a sample reserving and automatic emptying device of an automatic water quality sampler, which comprises a plurality of sample reserving bottles, a plurality of sample reserving bottles form a ring, a water collecting box is arranged at the bottom of each sample reserving bottle, a water outlet is arranged at the bottom of each water collecting box, and a rotating shaft penetrates through the center of the ring. The rotating shaft is connected with an automatic emptying mechanism, an outer cylinder is sleeved outside the rotating shaft, a gear disc is connected outside the outer cylinder, a stepping motor is arranged on one side of the gear disc, a transmission gear meshed with the gear disc is arranged at the output end of the stepping motor, a water guide device is further arranged on the outer side of the outer cylinder, and a sample reserving mechanism is arranged in the water guide device. The automatic emptying mechanism comprises a fixing frame arranged on the gear disc, and an emptying control assembly and an emptying switch assembly are arranged on the fixing frame. The automatic water quality sampler has the following beneficial effects that the maintenance frequency of workers is reduced, the automation degree of the automatic water quality sampler is improved, and the positioning is accurate and reliable.

Description

Technical Field

[0001] This utility model relates to the field of automatic water quality monitoring technology, and in particular to a sample retention and automatic emptying device for an automatic water sampler. Background Technology

[0002] Automatic water samplers are used in the field of automatic water quality monitoring to collect water samples from pollution sources and supply them to online water quality monitoring instruments for testing. When a certain indicator (chemical oxygen demand, ammonia nitrogen, total phosphorus, total nitrogen, or heavy metals, etc.) measured by the online water quality monitoring instrument exceeds a set limit, the automatic water sampler needs to transfer the sample to a retention bottle for manual comparison in the laboratory. This means the automatic water sampler and the online water quality monitoring instrument work together to achieve sample retention for exceeding limits. The water sample collected by the automatic water sampler is stored in a sampling bucket. The water sample that meets the requirements is mixed in the sampling bucket and then supplied to the automatic water quality monitoring instrument for testing. When sample retention is needed for exceeding limits, the water sample in the sampling bucket is transferred to a retention bottle for later use. This retention bottle is usually a container with only one inlet. After the automatic water sampler transfers the sample to the retention bottle, on-site maintenance personnel usually manually remove the bottle to empty the water sample; it typically does not have an automatic emptying function. In addition, current conventional automatic water samplers have multiple sample bottles, such as 24. After all the sample bottles are used, researchers need to go to the site to empty them in time. Therefore, there is an urgent need for an automatic water sampler with an automatic sample bottle emptying device to improve the intelligence of the sampler, reduce the number of times maintenance personnel need to maintain it on site, and thus save costs. Utility Model Content

[0003] In order to solve the problems existing in the prior art, this utility model provides a sample retention and automatic emptying device for an automatic water sampler, so as to solve the problem of low automation level of the automatic water sampler.

[0004] To solve the above problems, the technical solution of this utility model is as follows: A sample retention and automatic emptying device for an automatic water quality sampler includes several sample bottles arranged in a ring. A water collection box is provided at the bottom of the sample bottles, and a drain outlet is provided at the bottom of the water collection box. A rotating shaft is provided through the center of the ring, and an automatic emptying mechanism is connected to the rotating shaft. An outer cylinder is provided outside the rotating shaft, and a gear disk is connected to the outer cylinder. A stepper motor is provided on one side of the gear disk, and a transmission gear meshing with the gear disk is provided at the output end of the stepper motor. A water guide is also provided on the outside of the outer cylinder, and a sample retention mechanism is provided inside the water guide.

[0005] Furthermore, the sample bottle is equipped with a self-sealing mechanism at both the top and bottom.

[0006] Furthermore, the automatic venting mechanism includes a fixed frame mounted on the gear disk, a venting control component on the fixed frame that controls the up-and-down reciprocating motion of the rotating shaft, and a venting switch component connected to the bottom of the rotating shaft.

[0007] Furthermore, the venting control component includes a cam motor located on one side of the fixed frame. The output end of the cam motor is connected to a cam. The cam is connected to the rotating shaft via a connecting rod. A limiting groove is provided at the lower end of the fixed frame to limit the up and down movement of the connecting rod. It also includes a limiting block located in the annulus that allows the rotating shaft to pass through. A spring with one end abutting against the limiting block is provided on the rotating shaft.

[0008] Furthermore, the drain switch assembly is arc-shaped, with a hinge hole for hinged connection with the water collection box, a sliding groove at one end of the drain switch assembly, a sliding rod that slides along the sliding groove at the bottom of the rotating shaft, and a top hook that pushes up the self-sealing mechanism at the other end of the drain switch assembly.

[0009] Furthermore, the sample retention mechanism includes a water injection head passing through the end of the water guide, a water guide groove at the end of the water guide, the water injection head sliding up and down along the water guide groove, a water injection head inlet on the water injection head, a water guide pipe passing through the fixed frame, the outer cylinder, the water guide and connected to the water injection head inlet, and also includes a sample retention control component for controlling the up and down movement of the water injection head.

[0010] Furthermore, the sample retention control component includes a sample retention motor located on one side of the fixed frame. The sample retention motor is connected to a rope locking wheel, and a steel wire is connected to the rope locking wheel. A first guide wheel is provided inside the outer cylinder, and a second guide wheel is provided inside the water guide. The steel wire passes through the first guide wheel and the second guide wheel and is connected to the upper end of the water injection head. A locking spring is provided on the water injection head.

[0011] Furthermore, a first positioner is provided on the gear disk to position the water guide, and a second positioner is provided on the cam motor to position the upper and lower positioning points of the cam.

[0012] Furthermore, the sample bottle includes an inlet at the top and an outlet at the bottom, and the self-sealing mechanism is a spring check valve located at the inlet and outlet.

[0013] Furthermore, the water collection box is barrel-shaped, and a fixing plate for fixing the sample bottle is connected to the upper end of the water collection box.

[0014] Compared with existing technologies, this utility model has the following advantages: it uses three motors working together to complete the sampling, emptying, and switching of sample bottles, reducing the number of maintenance tasks for staff, improving the automation level of the automatic water sampler, and ensuring accurate and reliable positioning; the rotating shaft is located inside the ring, making the structure compact and reducing the space occupied by the device; the rotation of the sampling motor pulls the steel wire, causing the water injection head to move downward and insert into the sample bottle to complete the sampling operation; the cam motor controls the up and down movement of the rotating shaft, driving the emptying switch assembly to rotate, realizing the automatic discharge of liquid. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0017] Figure 3 This is a top view of the structure of this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 5 For this utility model Figure 1 Schematic diagram of the structure at point A in the middle;

[0020] Figure 6 This is a schematic diagram of the structure of an existing automatic water quality sampler.

[0021] In the diagram: 1 Sample bottle, 2 Water collection box, 201 Fixing plate, 3 Drain outlet, 4 Rotating shaft, 401 Slide rod, 5 Outer cylinder, 6 Gear disk, 7 Stepper motor, 701 Transmission gear, 8 Water guide, 801 Water guide groove, 9 Fixing frame, 10 Cam motor, 11 Cam, 12 Connecting rod, 13 Limit groove, 14 Limit block, 15 Spring, 16 Drain switch assembly, 1601 Slide groove, 1602 Top hook, 17 Hinge hole, 18 Water injection head, 1801 Water injection head inlet, 19 Water guide pipe, 20 Sample motor, 21 Locking rope wheel, 22 Steel wire, 23 First guide wheel, 24 Second guide wheel, 25 Locking spring, 26 First positioner, 27 Second positioner. Detailed Implementation

[0022] like Figure 1-5As shown, an automatic water sampler includes a sample retention and automatic emptying device, comprising several sample bottles 1 arranged in a ring. A water collection box 2 is provided at the bottom of the sample bottles 1, and a drain outlet 3 is provided at the bottom of the water collection box 2. A rotating shaft 4 is provided through the center of the ring, and an automatic emptying mechanism is connected to the rotating shaft 4. An outer cylinder 5 is provided around the rotating shaft 4, and a gear disk 6 is connected to the outer cylinder 5. A stepper motor 7 is provided on one side of the gear disk 6. The output end of the stepper motor 7 is provided with a transmission gear 701 that meshes with the gear disk 6. The stepper motor 7 can be fixed on the cooling box of the automatic water sampler. A water guide 8 is also provided on the outside of the outer cylinder 5, and a sample retention mechanism is provided inside the water guide 8.

[0023] The sample bottle 1 is equipped with a self-sealing mechanism at both the top and bottom. The self-sealing mechanism is a spring check valve located at the inlet and outlet of the sample bottle 1. The spring check valve is existing technology and its structure is known, so it will not be described in detail. The self-sealing mechanism at the inlet can be a cross-shaped silicone pad, which can achieve sealing for sample retention and drainage.

[0024] like Figure 4 , Figure 5 As shown, the automatic venting mechanism includes a fixed frame 9 mounted on the gear disk 6, a venting control component that controls the up-and-down reciprocating motion of the rotating shaft 4 on the fixed frame 9, and a venting switch assembly 16 connected to the bottom of the rotating shaft 4.

[0025] The venting control assembly includes a cam motor 10 located on one side of the fixed frame 9. The output end of the cam motor 10 is connected to a cam 11. The cam 11 is connected to the rotating shaft 4 via a connecting rod 12. A limiting groove 13 is provided at the lower end of the fixed frame 9 to limit the up and down movement of the connecting rod 12. It also includes a limiting block 14 located in the annulus that allows the rotating shaft 4 to pass through. A spring 15 is provided on the rotating shaft 4 with one end abutting against the limiting block 14.

[0026] like Figure 2 , Figure 5 As shown, the drain switch assembly 16 is arc-shaped. The drain switch assembly 16 is provided with a hinge hole 17 that is hinged to the water collection box 2. A slide groove 1601 is provided at one end of the drain switch assembly 16. A slide rod 401 that slides along the slide groove 1601 is provided at the bottom of the rotating shaft 4. A top hook 1602 that pushes up the self-sealing mechanism is provided at the other end of the drain switch assembly 16.

[0027] like Figure 4 , Figure 5 As shown, the sample retention mechanism includes a water injection head 18 passing through the end of the water guide 8, a water guide groove 801 at the end of the water guide 8, the water injection head 18 sliding up and down along the water guide groove 801, a water injection head inlet 1801 on the water injection head 18, a water guide pipe 19 passing through the fixing frame 9, the outer cylinder 5, the water guide 8 and connected to the water injection head inlet 1801, and also includes a sample retention control component for controlling the up and down movement of the water injection head 18.

[0028] The sample retention control assembly includes a sample retention motor 20 located on one side of the fixed frame 9. The sample retention motor 20 is connected to a rope locking wheel 21. A steel wire 22 is connected to the rope locking wheel 21. A first guide wheel 23 is provided inside the outer cylinder 5. A second guide wheel 24 is provided inside the water guide 8. The steel wire 22 passes through the first guide wheel 23 and the second guide wheel 24 and is connected to the upper end of the water injection head 18. A locking spring 25 is provided on the water injection head 18.

[0029] A first positioner 26 is provided on the gear disk 6 to position the water guide 8, and a second positioner 27 is provided on the cam motor 10 to position the upper and lower positioning points of the positioning cam 11.

[0030] The water collection box 2 is barrel-shaped, and a fixing plate 201 for fixing the sample bottle 1 is connected to the upper end of the water collection box 2 to prevent the sample bottle 1 from shifting.

[0031] like Figure 5 As shown, when using it, first select sample bottle 1, then take the sample. The water sample is discharged from the water mixing tank of the automatic water sampler to sample bottle 1. When emptying, first select sample bottle 1, and then empty sample bottle 1.

[0032] Specifically, during sampling, the control system of the automatic water sampler controls the stepper motor 7 to rotate, and the first positioner 26 positions and selects the sample bottle 1 to be sampled. Each sample bottle 1 has a self-sealing device at its upper end. The control system controls the sampling motor 20 to rotate, which drives the locking rope wheel 21 to rotate. The steel wire 22 wraps around the locking rope wheel 21, and changes direction through the first guide wheel 23 and the second guide wheel 24. The steel wire 22 is pulled down, and the water injection head 18 compresses the locking spring 25 downward, opening the self-sealing mechanism at the upper end of the sample bottle 1 to inject water. After water injection is completed, the sampling motor 20 stops, the locking spring 25 relaxes and resets, and the water injection head 18 is pulled out of the self-sealing mechanism, completing the sampling operation. During emptying, the control system... The cam motor 10 is controlled to rotate, which drives the cam 11 to rotate. The connecting rod 12 moves downward along the limiting groove 13, compressing the spring 15. The lower end of the sample bottle 1 has a self-sealing device, which is opened by pushing the top hook 1602 of the drain switch assembly 16 upward. The water sample is drained into the water collection box 2 by gravity. After draining, the self-sealing switch is reset, the spring 15 is relaxed, the drain switch assembly 16 is reset, and the sample bottle 1 self-seales. The stepper motor 7 drives the transmission gear 701 to drive the gear disk 6 to rotate. The first positioner 26 determines the bottle number position, realizing the positioning of the bottle number. The cam motor 10 drives the cam 11 to rotate, and the second positioner 27 determines the upper and lower positioning points.

[0033] This application provides separate control over sample retention, emptying, and selection of sample bottle 1, achieving a high degree of automation compared to existing automatic water samplers, such as... Figure 6As shown, this reduces the workload of staff, improves the automation level of the automatic water sampler, ensures accurate and reliable positioning, and increases work efficiency.

[0034] The above specific embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A sample retention and automatic emptying device for an automatic water sampler, comprising a plurality of sample bottles arranged in a ring, a water collection box at the bottom of each sample bottle, and a drain outlet at the bottom of the water collection box, characterized in that: A rotating shaft is located through the center of the ring. The rotating shaft is connected to an automatic drainage mechanism. An outer cylinder is installed around the rotating shaft. A gear disk is connected to the outer cylinder. A stepper motor is installed on one side of the gear disk. The output end of the stepper motor is equipped with a transmission gear that meshes with the gear disk. A water guide is also installed on the outside of the outer cylinder. A sample retention mechanism is installed inside the water guide.

2. The sample retention and automatic emptying device according to claim 1, characterized in that: The sample bottle is equipped with a self-sealing mechanism at both the top and bottom.

3. The sample retention and automatic emptying device according to claim 2, characterized in that: The automatic venting mechanism includes a fixed frame mounted on a gear disk, a venting control component on the fixed frame that controls the up-and-down reciprocating motion of the rotating shaft, and a venting switch component connected to the bottom of the rotating shaft.

4. The sample retention and automatic emptying device according to claim 3, characterized in that: The venting control assembly includes a cam motor located on one side of the fixed frame. The output end of the cam motor is connected to a cam. The cam is connected to the rotating shaft via a connecting rod. A limiting groove is provided at the lower end of the fixed frame to limit the up and down movement of the connecting rod. The assembly also includes a limiting block located in the annulus that allows the rotating shaft to pass through. A spring with one end abutting against the limiting block is provided on the rotating shaft.

5. The sample retention and automatic emptying device according to claim 4, characterized in that: The drain switch assembly is arc-shaped and has a hinge hole that is hinged to the water collection box. One end of the drain switch assembly has a sliding groove, and the bottom of the rotating shaft has a sliding rod that slides along the sliding groove. The other end of the drain switch assembly has a top hook that pushes up the self-sealing mechanism.

6. The sample retention and automatic emptying device according to claim 5, characterized in that: The sample retention mechanism includes a water injection head passing through the end of the water guide, a water guide groove at the end of the water guide, the water injection head sliding up and down along the water guide groove, a water injection head inlet on the water injection head, a water guide pipe passing through the fixed frame, the outer cylinder, the water guide and connected to the water injection head inlet, and also includes a sample retention control component for controlling the up and down movement of the water injection head.

7. The sample retention and automatic emptying device according to claim 6, characterized in that: The sample retention control assembly includes a sample retention motor located on one side of the fixed frame. The sample retention motor is connected to a locking rope wheel, and a steel wire is connected to the locking rope wheel. A first guide wheel is provided inside the outer cylinder, and a second guide wheel is provided inside the water guide. The steel wire passes through the first guide wheel and the second guide wheel and is connected to the upper end of the water injection head. A locking spring is provided on the water injection head.

8. The sample retention and automatic emptying device according to claim 7, characterized in that: A first positioner is provided on the gear disk to position the water guide, and a second positioner is provided on the cam motor to position the upper and lower positioning points of the cam.

9. The sample retention and automatic emptying device according to claim 8, characterized in that: The sample bottle includes an inlet at the top and an outlet at the bottom, and the self-sealing mechanism is a spring check valve located at the inlet and outlet.

10. The sample retention and automatic emptying device according to claim 9, characterized in that: The water collection box is barrel-shaped, and a fixing plate for fixing the sample bottle is connected to the upper end of the water collection box.

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