Dry ice bath device for detecting and reserving samples of drugs in domestic sewage
By designing a dry ice bath for domestic sewage and drug detection, automatic collection and freezing and preservation are achieved, solving the problem of operators frequently operating ultra-low-temperature freezer cabinets in the prior art, reducing the risk of frostbite and resource waste, and achieving low-cost stable and low-temperature preservation.
Patent Information
- Application Number
- CN202421569690.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-04
AI Technical Summary
In the prior art, domestic sewage drug testing requires 24 hours of sampling and immediate cryopreservation, resulting in the lack of automatic collectors in the sewage treatment plant. Operators need to frequently operate ultra-low temperature freezing cabinets, which are prone to frostbite and waste resources and high costs.
A dry ice bath for domestic sewage drug detection and retaining samples is designed, including a dry ice-solvent preparation tank, an ice bath grid, a sampling bottle, a contact pipe port and a opening and closing mechanism, to realize automatic collection and cryopreservation, and use a dry ice-solvent bath to maintain low temperature.
Through automatic collection and freezing and storage, operators have reduced frequent operations of ultra-low temperature freezer cabinets, reduced frostbite risks, saved resources, reduced costs, and achieved stable low temperature preservation, suitable for domestic sewage and drug testing.
Smart Images
Figure CN222825309U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of domestic sewage detection and sample retention equipment, and in particular to a dry ice bath for domestic sewage drug detection and sample retention. Background Art
[0002] Currently, according to the standard TSHSFJD0001-2021, 13 common drugs and metabolites such as amphetamine, methamphetamine, O6-monoacetylmorphine, morphine, codeine, tramadol, 3,4-methylenedioxymethamphetamine, 3,4-methylenedioxyamphetamine, cocaine, benzoylecgonine, ketamine, norketamine, and methcathinone are stipulated to trace the drug manufacturing and drug use in the region through biological sewage sampling.
[0003] There are clear requirements for the sampling and retention of sewage samples: sampling frequency every 24 hours, sampling volume of 500mL / bottle, sampled samples are immediately frozen (≤-20℃), and stored away from light. Samples collected within 24 hours are mixed in equal proportions, and 500mL samples are sent to the testing unit for measurement.
[0004] In the relevant technology, since the standards require high sample retention conditions (24h periodic sampling, and immediate freezing and storage at ≤-20℃ after sampling), sewage treatment plants currently do not have automatic water sample collectors specially designed for drug testing. They can only manually collect water samples periodically and then manually store them in ultra-low temperature freezers. Operators frequently operate ultra-low temperature freezers, which can easily cause frostbite. In addition, the sample size of domestic sewage drug testing is generally not large. Using ultra-low temperature freezers to retain samples for long-term domestic sewage drug testing can easily lead to waste of resources and high costs. Utility Model Content
[0005] The purpose of the present application is to provide a dry ice bath for retaining samples of domestic sewage drug detection, so as to solve the problem in the related technology that, due to the high sample retention conditions required by the standards (24h periodic sampling, immediate freezing and storage at ≤-20℃ after sampling), sewage treatment plants currently do not have automatic water sample collectors specially designed for drug detection, and can only manually collect water samples periodically and then manually store them in ultra-low temperature freezers. Operators frequently operate ultra-low temperature freezers, which can easily cause frostbite. In addition, the sample size of domestic sewage drug detection is generally not large. Using ultra-low temperature freezers to retain samples for long-term domestic sewage drug detection can easily lead to waste of resources and excessive costs.
[0006] The present application provides a dry ice bath for sample retention for drug detection in domestic sewage, which adopts the following technical solution:
[0007] A dry ice bath for retaining samples for drug detection in domestic sewage, comprising a dry ice-solvent preparation tank, one side of the dry ice-solvent preparation tank is connected to a plurality of ice bath grids, sampling bottles are placed in the plurality of ice bath grids, the bottle mouths of the plurality of sampling bottles are provided with contact pipe openings, the tops of the plurality of ice bath grids are covered with a first heat-insulating cover plate matched with the contact pipe openings, and opening and closing mechanisms are provided between the plurality of ice bath grids and the dry ice-solvent preparation tanks.
[0008] Furthermore, a sliding groove is provided on one side of some of the ice bath grids, and the opening and closing mechanism includes a heat preservation baffle slidably arranged in the sliding groove, and a limiting groove is provided on one side of the heat preservation baffle, and a limiting component abutting against the top of the ice bath grid is arranged in the limiting groove.
[0009] Furthermore, the limiting assembly comprises a limiting block arranged on the wall of the limiting groove, a limiting rod is hinged on the limiting block, and a blocking rod matched with the limiting rod is also arranged on one side of the limiting block.
[0010] Furthermore, a lifting handle is provided on the top of the heat-insulating baffle.
[0011] Furthermore, a waste liquid outlet is provided at a bottom end of one side of a plurality of the ice bath grids, and a sealing cover is provided in the waste liquid outlet.
[0012] Furthermore, a material pushing slope is arranged inside the dry ice-solvent preparation tank.
[0013] Furthermore, a thermometer is provided on the inner wall of the dry ice-solvent preparation tank.
[0014] Furthermore, the top of the dry ice-solvent preparation tank is covered with a second heat-insulating cover plate.
[0015] Compared with the prior art, the beneficial effects of this application are:
[0016] By arranging a dry ice-solvent preparation tank, an ice bath grid, a sampling bottle, a contact tube mouth, a first thermal insulation cover plate and an opening and closing mechanism that cooperate with each other, the test water samples can be automatically collected and frozen for storage, so that the operator does not need to frequently operate the ultra-low temperature freezer to avoid frostbite.
[0017] At the same time, the use of a dry ice-solvent bath to generate and maintain low temperatures is simple, reliable and low-cost. Generally, granular dry ice is carefully added to the required solvent until dry ice blocks coated with frozen solvent appear. At this time, the cooling bath temperature has reached the steady-state temperature that can be achieved. After that, it is only necessary to add dry ice blocks and stir them at regular intervals to maintain the temperature, which can effectively save resources. The dry ice solvent bath has good temperature reproducibility, and the change in steady-state temperature can be controlled within a range of ±1°C.
[0018] In addition, the entire dry ice bath is made of thermal insulation material, which can form stable low-temperature conditions that meet the above standards at a low cost. It is completely suitable for the retention of water samples for drug detection in domestic sewage. Except for taking over the peristaltic pump infusion pipe and replenishing dry ice, basically no other intervention is required by the operator, reducing the risk of frostbite. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of a dry ice bath for retaining samples of domestic sewage for drug detection in an embodiment of the present application.
[0020] Figure 2 It is a schematic diagram of the structure when the heat preservation baffle of the embodiment of the present application is closed.
[0021] Figure 3 It is a schematic diagram of the structure when the heat preservation baffle of the embodiment of the present application is opened.
[0022] Description of reference numerals:
[0023] 1. Dry ice-solvent preparation tank; 11. Pushing ramp; 12. Thermometer; 13. Second insulation cover; 2. Ice bath grid; 21. Sampling bottle; 22. Contact tube mouth; 23. First insulation cover; 24. Sliding slot; 25. Waste liquid outlet; 3. Insulation baffle; 31. Limiting slot; 32. Limiting block; 33. Limiting rod; 34. Blocking rod; 35. Lifting handle. DETAILED DESCRIPTION
[0024] The following is combined with Figure 1-3 This application is described in further detail.
[0025] The present application embodiment discloses a dry ice bath for sample retention for drug detection in domestic sewage, referring to Figure 1 In this embodiment, the dry ice bath for drug detection in domestic sewage includes a dry ice-solvent preparation tank 1, an ice bath grid 2, a contact pipe mouth 22, a first heat-insulating cover plate 23, and an opening and closing mechanism. Among them, there are several ice bath grids 2, and sampling bottles 21 are placed in the several ice bath grids 2. The sampling bottles 21 are used to collect and store the test water samples, and the side of the dry ice-solvent preparation tank 1 is provided with an outlet. The ice bath grids 2 are respectively installed at the opening of the dry ice-solvent preparation tank 1, so that one side of the ice bath grids 2 is connected to the opening of the dry ice-solvent preparation tank 1.
[0026] At the same time, an inlet is opened at the top of the dry ice-solvent preparation tank 1 to pour the dry ice and solvent into the dry ice-solvent preparation tank 1 along the inlet, and a pushing slope 11 is installed inside the dry ice-solvent preparation tank 1. Through the pushing slope 11, the dry ice and solvent inside the dry ice-solvent preparation tank 1 tend to move toward the ice bath grid 2 due to the action of the pushing slope 11, so that the dry ice and the solvent are mixed in the ice bath grid 2 to stably maintain the low temperature state, so that the test water sample in the sampling bottle 21 can be frozen and stored.
[0027] In addition, a plurality of contact pipe openings 22 are provided, and the plurality of contact pipe openings 22 are respectively installed on the bottle openings of the sampling bottles 21; a plurality of first thermal insulation covers 23 are provided, and the plurality of first thermal insulation covers 23 are respectively detachably sealed and covered on the tops of the ice bath grids 2 to reduce the temperature loss in the ice bath grids 2; and through holes are opened at the centers of the first thermal insulation covers 23, and the through holes respectively cooperate with the contact pipe openings 22, so that the contact pipe openings 22 extend out of the tops of the first thermal insulation covers 23 along the through holes, thereby exposing the contact pipe openings 22 to the outside of the entire ice bath grid 2.
[0028] At the same time, the contact pipe port 22 is connected to the input pipe of the external sampling peristaltic pump. When the external sampling peristaltic pump is started, the sampling peristaltic pump discharges the test water sample into the contact pipe port 22 through the input pipe, thereby uniformly discharging the test water sample into the sampling bottle 21 for frozen storage. The sampling bottles 21 are all placed in the ice bath grids 2 in advance, and then the first heat preservation cover plate 23 is sealed on the ice bath grid 2, so as to reduce the frequent opening of the ice bath grid 2 during sampling, thereby reducing temperature loss; and the contact pipe port 22 is exposed to the outside, which can ensure that the pipeline is unobstructed and will not be frozen by low temperature.
[0029] Preferably, a thermometer 12 is also installed on the inner wall of the dry ice-solvent preparation tank 1, and the temperature in the dry ice-solvent preparation tank 1 can be detected by the thermometer 12. A second heat-insulating cover plate 13 is also detachably sealed on the top of the dry ice-solvent preparation tank 1. The second heat-insulating cover plate 13 can reduce the temperature loss. After the dry ice-solvent preparation tank 1 is filled with dry ice, the solvent is poured in, and after the thermometer 12 shows a suitable low temperature, the second heat-insulating cover plate 13 is covered. In this way, the required low-temperature environment can be formed inside the dry ice-solvent preparation tank 1, thereby realizing the frozen storage of the test water sample in the sampling bottle 21.
[0030] In addition, refer to Figure 1 and Figure 2 In this embodiment, a plurality of opening and closing mechanisms are provided, and the plurality of opening and closing mechanisms are respectively provided between the ice bath grids 2 and the dry ice-solvent preparation tanks 1 to control the opening and closing of the ice bath grids 2 .
[0031] Specifically, the opening and closing mechanism includes a heat preservation baffle 3 and a limit assembly. The heat preservation baffle 3 is slidably installed between the ice bath grid 2 and the dry ice-solvent preparation tank 1, and a sliding groove 24 is provided on the side of the ice bath grid 2 facing the dry ice-solvent preparation tank 1. The heat preservation baffle 3 and the sliding groove 24 cooperate with each other, so that the heat preservation baffle 3 slides into the ice bath grid 2 along the sliding groove 24, thereby being able to control the opening and closing of the ice bath grid 2.
[0032] A lifting handle 35 is also installed on the top of the heat-insulating baffle 3. By providing the lifting handle 35, it is convenient to lift the heat-insulating baffle 3 upward, so that the ice bath grid 2 and the dry ice-solvent preparation tank 1 are connected to each other, so that the dry ice and the solvent are discharged from the dry ice-solvent preparation tank 1 into the ice bath grid 2.
[0033] At the same time, a limiting groove 31 is opened on the side of the insulation baffle 3 away from the dry ice-solvent preparation tank 1, and the limiting component is arranged in the limiting groove 31, and the limiting component and the top of the ice bath grid 2 abut against each other, so that the insulation baffle 3 can be effectively and firmly limited when the insulation baffle 3 is picked up.
[0034] Specifically, refer to Figure 2 and Figure 3 In this embodiment, the limit assembly includes a limit block 32, a limit rod 33 and a blocking rod 34. The limit block 32 is mounted on the groove wall of the limit groove 31; one end of the limit rod 33 is hinged on the limit block 32; one end of the blocking rod 34 is fixedly mounted on the side of the limit block 32 away from the heat preservation baffle 3, and the blocking rod 34 is arranged perpendicular to the limit block 32 and can effectively block the limit rod 33, so that the limit rod 33 can only swing 90 degrees.
[0035] When the lifting handle 35 is held to apply force to lift the heat preservation baffle 3, the limiting groove 31 leaks out of the top of the sliding groove 24, and then the limiting rod 33 is swung along the direction of the ice bath grid 2, and then the limiting rod 33 is horizontally placed on the first heat preservation cover plate 23 under the blocking effect of the blocking rod 34, so that the heat preservation baffle 3 can be automatically limited to realize the opening and connection between the ice bath grid 2 and the dry ice-solvent preparation tank 1. At the same time, it is not necessary to slide the heat preservation baffle 3 completely out of the sliding groove 24, so that the leakage of cold air from the sliding groove 24 can also be reduced.
[0036] When the sampling bottle 21 in one of the ice bath grids 2 has completed the infusion of the test water sample, the insulation baffle 3 is immediately opened, and the ice bath grid 2 and the dry ice-solvent preparation tank 1 are opened and connected under the limiting action of the limiting rod 33 and the blocking rod 34, so that the dry ice and solvent in the dry ice-solvent preparation tank 1 are pushed into the ice bath grid 2, and the test water sample in the sampling bottle 21 can be preserved in a low-temperature dry ice bath.
[0037] Better, refer to Figure 1-Figure 3 In this embodiment, a waste liquid outlet 25 is provided at the bottom of a side of the plurality of ice bath grids 2 away from the dry ice-solvent preparation tank 1. The waste liquid outlet 25 can be used to discharge the waste solvent after the dry ice bath reaction is completed. At the same time, a sealing cover is sealed inside the waste liquid outlet 25. The sealing cover can prevent the mixture of dry ice and solvent from being discharged from the outside of the ice bath grid 2 along the waste liquid outlet 25 during the dry ice bath reaction.
[0038] Therefore, by arranging the dry ice-solvent preparation tank 1, the ice bath grid 2, the sampling bottle 21, the contact pipe mouth 22, the first insulation cover plate 23 and the opening and closing mechanism to cooperate with each other, the test water samples can be automatically collected and frozen for preservation, so that the operator does not need to frequently operate the ultra-low temperature freezer to avoid frostbite.
[0039] At the same time, the use of a dry ice-solvent bath to generate and maintain low temperatures is simple, reliable and low-cost. Generally, granular dry ice is carefully added to the required solvent until dry ice blocks coated with frozen solvent appear. At this time, the cooling bath temperature has reached the steady-state temperature that can be achieved. After that, it is only necessary to add dry ice blocks and stir them at regular intervals to maintain the temperature, which can effectively save resources. The dry ice solvent bath has good temperature reproducibility, and the change in steady-state temperature can be controlled within a range of ±1°C.
[0040] In addition, the entire dry ice bath is made of thermal insulation material, which can form stable low-temperature conditions that meet the above standards at a low cost. It is completely suitable for the retention of water samples for drug detection in domestic sewage. Except for taking over the peristaltic pump infusion pipe and replenishing dry ice, basically no other intervention is required by the operator, reducing the risk of frostbite.
[0041] The implementation principle of a dry ice bath for sample retention for drug detection in domestic sewage according to an embodiment of the present application is as follows: first open the first insulation cover 23 of the ice bath grid 2, place each of the sampling bottles 21 in the ice bath grid 2, then cover the first insulation cover 23, expose the contact pipe opening 22 to the outside of the first insulation cover 23, and lower the insulation baffle 3.
[0042] Open the second insulation cover 13 of the dry ice-solvent preparation tank 1, fill the dry ice-solvent preparation tank 1 with dry ice, and then pour the solvent into the dry ice-solvent preparation tank 1. After the thermometer 12 shows a suitable low temperature, cover the second insulation cover 13, use a peristaltic pump to connect one of the contact pipe openings 22 to start sampling, and after the sampling is completed, open the insulation baffle 3, and push the dry ice solvent mixture into the ice bath grid 2 to keep the test water sample in the sampling bottle 21 at a low temperature.
[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A dry ice bath for sampling domestic sewage drug detection, characterized in that: The invention comprises a dry ice-solvent preparation tank (1), one side of the dry ice-solvent preparation tank (1) is connected to a plurality of ice bath grids (2), a sampling bottle (21) is placed in each of the ice bath grids (2), the bottle mouths of each of the sampling bottles (21) are provided with a contact pipe mouth (22), the tops of the plurality of ice bath grids (2) are covered with a first heat-insulating cover plate (23) matched with the contact pipe mouth (22), and an opening and closing mechanism is provided between each of the ice bath grids (2) and the dry ice-solvent preparation tank (1).
2. A dry ice bath for sample retention in domestic sewage drug detection according to claim 1, characterized in that: A sliding groove (24) is provided on one side of the plurality of ice bath grids (2); the opening and closing mechanism comprises a heat preservation baffle (3) slidably arranged in the sliding groove (24); a limiting groove (31) is provided on one side of the heat preservation baffle (3); a limiting component abutting against the top end of the ice bath grid (2) is provided in the limiting groove (31).
3. A dry ice bath for sample retention in domestic sewage drug detection according to claim 2, characterized in that: The limiting assembly comprises a limiting block (32) arranged on the groove wall of the limiting groove (31), a limiting rod (33) being hingedly connected to the limiting block (32), and a blocking rod (34) cooperating with the limiting rod (33) being arranged on one side of the limiting block (32).
4. A dry ice bath for sample retention in domestic sewage drug detection according to claim 2, characterized in that: A lifting handle (35) is provided on the top of the heat-insulating baffle (3).
5. The dry ice bath for sample retention in domestic sewage drug detection according to claim 1, characterized in that: A waste liquid discharge port (25) is provided at the bottom end of one side of a plurality of the ice bath grids (2), and a sealing cover is provided inside the waste liquid discharge port (25).
6. A dry ice bath for sample retention in domestic sewage drug detection according to claim 1, characterized in that: A material pushing inclined surface (11) is arranged inside the dry ice-solvent preparation tank (1).
7. A dry ice bath for sample retention in domestic sewage drug detection according to claim 6, characterized in that: A thermometer (12) is arranged on the inner wall of the dry ice-solvent preparation tank (1).
8. A dry ice bath for sample retention in domestic sewage drug detection according to claim 7, characterized in that: The top of the dry ice-solvent preparation tank (1) is covered with a second heat-insulating cover plate (13).