Full-automatic total phosphorus and total nitrogen analyzer convenient for sample tube cooling

Abstract

The utility model discloses a full-automatic total phosphorus and total nitrogen analyzer convenient for sample tube cooling, and relates to the technical field of detection devices, the analyzer comprises a rack, a full-automatic digestion pot, a sample rack, a cooling fan, a liquid adding mechanism and a moving mechanism, a plurality of sample tubes are placed on the sample rack; a control mechanism is arranged at the sample frame on the rack, a placement plate is arranged at the execution end of the control mechanism, and the sample frame is detachably connected with the placement plate; the cooling fan is arranged close to the edge of the sample frame. After the digestion work is completed, the moving mechanism moves the sample tube in the full-automatic digestion pot to the sample frame at the cooling fan, then the cooling fan starts to work, and wind generated by the cooling fan blows to the sample frame. And meanwhile, the control mechanism works, so that the sample frame can move up and down while rotating, and the parts, with different heights, of the sample tube which is placed on the sample frame and is of a slender structure can receive wind generated by the cooling fan, so that the cooling of the sample tube is accelerated.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a full-automatic total phosphorus and total nitrogen analyzer which is convenient for cooling a sample tube. Background Art

[0002] Phosphorus and nitrogen are the main elements contributing to eutrophication in water bodies. Eutrophication can affect water quality and cause mass fish mortality. Furthermore, long-term consumption of eutrophic water can lead to poisoning and illness. Therefore, total phosphorus and total nitrogen levels are crucial parameters for evaluating the effectiveness of sewage treatment plants. Their determination requires a high-temperature, high-pressure digestion process. According to the national standards GB 11893-89 for total phosphorus and HJ 636 2012 for total nitrogen, both tests require digestion at approximately 120°C. Traditional manual procedures are cumbersome, labor-intensive, and inefficient. Therefore, a fully automated total phosphorus and total nitrogen analyzer, designed to strictly adhere to national standards and automatically perform sample pretreatment, digestion, and analysis, can significantly reduce labor intensity and provide safety and efficiency.

[0003] After digestion is complete, the sample tubes need to be cooled. Existing techniques typically use air cooling to dissipate heat from the sample tubes, with the air generated by a cooling fan directed toward the tubes. However, sample tubes are typically long and slender. If the fan's sweeping range doesn't completely cover the tubes, the exposed areas of the tubes will cool faster, while unexposed areas will cool slower, reducing operational efficiency.

[0004] Therefore, a fully automatic total phosphorus and total nitrogen analyzer which is convenient for cooling the sample tube is proposed. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a full-automatic total phosphorus and total nitrogen analyzer which is convenient for cooling a sample tube.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A fully automatic total phosphorus and total nitrogen analyzer that facilitates cooling of sample tubes comprises a frame and a fully automatic digestion pot, a sample rack, a cooling fan, a liquid adding mechanism, and a moving mechanism for moving the sample tubes, all of which are arranged on the frame. A plurality of sample tubes are placed on the sample rack. A control mechanism is provided on the frame at the sample rack, and a placement plate is provided at the execution end of the control mechanism. The sample rack is detachably connected to the placement plate. The cooling fan is arranged near the edge of the sample rack.

[0008] Furthermore, in the present invention, the above-mentioned control mechanism includes a frame body arranged on the above-mentioned frame, a turntable rotatably connected to the above-mentioned frame body, at least two support rods arranged in parallel and spaced apart on the above-mentioned turntable, a driving mechanism and a lifting mechanism both arranged on the above-mentioned frame body, and one end of any of the above-mentioned support rods away from the above-mentioned turntable is connected to the above-mentioned placement plate; the above-mentioned driving mechanism is used to drive the above-mentioned turntable to rotate; and the above-mentioned lifting mechanism is transmission-connected to the above-mentioned placement plate.

[0009] Furthermore, in the present invention, any of the above-mentioned support rods includes a first sleeve and a sliding rod that are slidably connected to each other, the end of the above-mentioned first sleeve away from the above-mentioned sliding rod is connected to the above-mentioned turntable, and the end of the above-mentioned sliding rod away from the above-mentioned first sleeve is connected to the above-mentioned placement plate; the above-mentioned lifting mechanism includes a first motor arranged on the above-mentioned frame, a screw rod transmission connected to the driving end of the above-mentioned first motor, and a second sleeve threadedly connected to the above-mentioned screw rod, and the end of the above-mentioned second sleeve away from the above-mentioned screw rod is connected to the above-mentioned placement plate bearing; the central axis of the above-mentioned first sleeve, the central axis of the above-mentioned sliding rod, the central axis of the above-mentioned screw rod and the central axis of the above-mentioned second sleeve are parallel to each other.

[0010] Furthermore, in the present invention, the driving mechanism includes a second motor provided on the frame and a driving gear provided at the driving end of the second motor, and a gear ring adapted to the driving gear is provided on the circumference of the turntable, and the driving gear and the gear ring are meshed with each other.

[0011] Furthermore, in the present invention, the liquid adding mechanism includes a PPU mechanism provided on the frame, a reagent arm transmission-connected to the execution end of the PPU mechanism, and a clamping mechanism provided on the frame.

[0012] Furthermore, in the present invention, the above-mentioned moving mechanism includes an X-axis moving mechanism arranged on the above-mentioned frame, a Y-axis moving mechanism transmission-connected to the execution end of the above-mentioned X-axis moving mechanism, a Z-axis moving mechanism transmission-connected to the execution end of the above-mentioned Y-axis moving mechanism, and a rotating clamping mechanism arranged at the execution end of the above-mentioned Z-axis moving mechanism.

[0013] Furthermore, in the present invention, a liquid collection needle is also provided at the execution end of the Z-axis moving mechanism.

[0014] Furthermore, in the present invention, a needle washing pool is provided on the frame.

[0015] Furthermore, in the present invention, a first drawer for storing the photometer is provided on the frame.

[0016] Furthermore, in the present invention, a second drawer for storing bottle caps is provided on the frame.

[0017] The beneficial effects of the utility model are:

[0018] The utility model provides a fully automatic total phosphorus and total nitrogen analyzer that facilitates sample tube cooling. When the digestion process is completed, a moving mechanism moves the sample tubes in the fully automatic digestion pot to a sample rack located near a cooling fan. The cooling fan then starts operating, generating air that blows toward the sample rack. Simultaneously, a control mechanism operates to allow the sample rack to move up and down while rotating. Slender sample tubes placed on the sample rack at different heights can all receive air from the cooling fan, thereby accelerating the cooling of the sample tubes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0020] Figure 2 for Figure 1 The main view;

[0021] Figure 3 This is a schematic diagram of the installation position of the cooling fan according to an embodiment of the present utility model;

[0022] Figure 4 This is a schematic structural diagram of the control mechanism of an embodiment of the utility model;

[0023] Figure 5 This is a structural diagram of the liquid adding mechanism of an embodiment of the present utility model.

[0024] In the figure: 101-frame; 201-automatic digestion pot; 301-sample rack; 401-cooling fan; 501-sample tube; 601-placement plate; 701-frame; 702-turntable; 703-support rod; 7031-first sleeve; 7032-slide rod; 704-first motor; 705-screw; 706-second sleeve; 708-second motor; 709-driving gear; 801-PPU mechanism; 802-reagent arm; 803-gripping mechanism; 901-X-axis moving mechanism; 902-Y-axis moving mechanism; 903-Z-axis moving mechanism; 1001-liquid collection needle; 1101-needle washing pool; 1201-first drawer; 1301-second drawer. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0026] See also Figure 1-5 , the utility model provides a technical solution:

[0027] A fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling comprises a frame 101, a fully automatic digestion pot 201 mounted on the frame 101, a sample rack 301, a cooling fan 401, a liquid adding mechanism, and a moving mechanism for moving sample tubes 501. The sample rack 301 houses several sample tubes 501. A control mechanism is mounted on the frame 101, located near the sample rack 301. A placement plate 601 is mounted on the actuator end of the control mechanism, and the sample rack 301 is detachably connected to the placement plate 601. The cooling fan 401 is mounted near the edge of the sample rack 301. The structure and operating principle of the fully automatic digestion pot 201 are prior art and will not be elaborated upon here. The specific structure and operating principle of the fully automatic digestion pot 201 are described in detail in the prior art patent (Patent Title: A Total Phosphorus and Total Nitrogen Analyzer and Method of Use; Publication Number: CN118032689A). The connection between the sample rack 301 and the placement plate 601 can be designed as follows: a plurality of positioning posts are installed at the bottom of the sample rack 301, corresponding positioning holes are designed on the placement plate 601, and the positioning posts are inserted into the positioning holes when placing the sample rack 301.

[0028] Reference Figure 4 In this embodiment, the control mechanism includes a frame 701 installed on the frame 101, a turntable 702 rotatably connected to the frame 701, at least two support rods 703 installed in parallel and at intervals on the turntable 702, a driving mechanism and a lifting mechanism both installed on the frame 701, and one end of any support rod 703 away from the turntable 702 is connected to the placement plate 601; the driving mechanism is used to drive the turntable 702 to rotate; and the lifting mechanism is transmission-connected to the placement plate 601. Any support rod 703 includes a first sleeve 7031 and a slide rod 7032 that are slidably connected to each other. The end of the first sleeve 7031 away from the slide rod 7032 is connected to the turntable 702, and the end of the slide rod 7032 away from the first sleeve 7031 is connected to the placement plate 601; the lifting mechanism includes a first motor 704 installed on the frame 701, a screw 705 that is transmission-connected to the driving end of the first motor 704, and a second sleeve 706 that is threadedly connected to the screw 705, and the end of the second sleeve 706 away from the screw 705 is connected to the placement plate 601 bearing; the central axis of the first sleeve 7031, the central axis of the slide rod 7032, the central axis of the screw 705 and the central axis of the second sleeve 706 are parallel to each other. The driving mechanism includes a second motor 708 mounted on the frame 701 and a driving gear 709 mounted on the driving end of the second motor 708. A gear ring that matches the driving gear 709 is installed on the circumference of the turntable 702, and the driving gear 709 and the gear ring are meshed with each other.

[0029] After digestion is complete, the sample tubes 501 in the fully automatic digestion pot 201 are moved to the sample rack 301 located at the cooling fan 401 via a moving mechanism. The cooling fan 401 then begins to operate, generating air directed toward the sample rack 301. Simultaneously, the second motor 708 operates, controlling the rotation of the turntable 702 via the driving gear 709. This causes the placement plate 601 to rotate synchronously with the two support rods 703, and the sample rack 301 mounted on the placement plate 601 also rotates synchronously. The air generated by the cooling fan 401 dissipates heat from the sample tubes 501 on the sample rack 301.

[0030] Because the first sleeve 7031 and the slide bar 7032 are slidably connected, when the lifting mechanism is not operating, the lifting mechanism acts as a support for the placement plate 601, preventing the placement plate 601 from falling. When the first motor 704 and the second motor 708 are operating simultaneously, the second sleeve 706 can move up and down due to the threaded connection, thereby allowing the placement plate 601 to move up and down while rotating. In this way, the sample rack 301 can also move up and down while rotating, so that different heights of the slender sample tube 501 can receive the air generated by the cooling fan 401, thereby accelerating the cooling of the sample tube 501.

[0031] Reference Figure 1-Figure 3 、 Figure 5 In order to facilitate the addition of reagents into the corresponding sample tubes 501, the liquid adding mechanism in this embodiment includes a PPU mechanism 801 installed on the frame 101, a reagent arm 802 connected to the execution end of the PPU mechanism 801 by transmission, and a clamping mechanism 803 installed on the frame 101. The PPU mechanism 801 can control the movement of the reagent arm 802. The PPU mechanism 801 is a prior art and will not be described in detail here. A syringe is installed at one end of the reagent arm 802. When adding reagent, the PPU mechanism 801 controls the movement of the reagent arm 802 so that the syringe on the reagent arm 802 is aligned with the opening of the sample tube 501 clamped on the clamping mechanism 803.

[0032] In this embodiment, the moving mechanism includes an X-axis moving mechanism 901 mounted on the frame 101, a Y-axis moving mechanism 902 transmission-connected to the actuator end of the X-axis moving mechanism 901, a Z-axis moving mechanism 903 transmission-connected to the actuator end of the Y-axis moving mechanism 902, and a rotating clamping mechanism 803 (not shown) mounted on the actuator end of the Z-axis moving mechanism 903. The X-axis moving mechanism 901, the Y-axis moving mechanism 902, and the Z-axis moving mechanism 903 are all existing technologies, and for example, they can all employ a screw-nut mechanism. The structure of the rotating clamping mechanism 803 is similar to that of the aforementioned clamping mechanism 803, and is simply based on the structure of the aforementioned clamping mechanism 803, with the addition of a mechanism to control its own rotation.

[0033] Reference Figure 2After the water sample is processed, it is necessary to extract the water sample from the sample and inject the sample into the photometer through the syringe pump. Therefore, in order to facilitate this action, a liquid collection needle 1001 is installed at the execution end of the Z-axis moving mechanism 903.

[0034] Reference Figure 1 In order to facilitate cleaning of the liquid collection needle 1001 , a needle washing pool 1101 is installed at a corresponding position on the rack 101 .

[0035] Reference Figure 1-Figure 3 In order to store the photometer conveniently, a first drawer 1201 is installed at a corresponding position on the rack 101. When the photometer needs to be used, the first drawer 1201 can be pulled out.

[0036] Reference Figure 1-Figure 3 In order to store discarded bottle caps, a second drawer 1301 is installed at a corresponding position on the rack 101.

[0037] Working principle:

[0038] The instrument's frame 101 includes two sample racks 301, each equipped with two control mechanisms for rotating and lifting the sample racks 301. Each rack 301 has 42 sample positions, each capable of accommodating a sample tube 501. This allows for the testing of 84 samples at once.

[0039] When the measurement begins, the Z-axis moving mechanism 903 in the moving mechanism automatically moves to the corresponding position. Then, the rotating claw mechanism 803 installed on the Z-axis moving mechanism 903 grabs the sample tube 501 and places it at the reagent adding position on the reagent arm 802. The claw mechanism 803 then clamps the sample tube 501 and unscrews the cap of the sample tube 501 through the rotating claw mechanism 803 installed on the Z-axis moving mechanism 903. There are two ways to complete the reagent filling:

[0040] (1) Reagent is added into the sample tube 501 through the reagent arm 802 and the peristaltic pump assembly (not shown) installed on the rack 101.

[0041] (2) The liquid collection needle 1001 installed on the moving mechanism is matched with a syringe pump (not shown in the figure), and the reagent is added into the sample tube 501 through the pumping of the syringe pump.

[0042] After the reagent filling is completed, the bottle cap is tightened by the rotating clamping mechanism 803, and the sample tube 501 is clamped to the corresponding hole position of the sample rack 301 installed inside the fully automatic digestion pot 201. After all the reagents are filled, the fully automatic digestion pot 201 completes the digestion of the sample. After the digestion is completed, the sample tube 501 in the fully automatic digestion pot 201 is moved to the sample rack 301 at the cooling fan 401 by the moving mechanism. Then the cooling fan 401 starts working, and the second motor 708 starts working at the same time. It controls the rotation of the turntable 702 through the driving gear 709, and the placement plate 601 rotates synchronously under the drive of the two support rods 703. The sample rack 301 installed on the placement plate 601 also rotates synchronously, and the wind generated by the cooling fan 401 can dissipate heat for the multiple sample tubes 501 on the sample rack 301.

[0043] As the placement plate 601 rotates, the first motor 704 is activated as needed, controlling the rotation of the screw 705. The second sleeve 706, through a threaded connection, controls the vertical movement of the placement plate 601. This allows the sample rack 301 to move up and down while rotating. This allows the cooling fan 401 to be applied to all heights of the slender sample tubes 501, accelerating cooling.

[0044] When the temperature of the sample tube 501 drops to a preset level, the rotating clamp mechanism 803 unscrews the cap of the sample tube 501. The corresponding reagent is then added to each sample. Once the water sample is processed, the liquid extraction needle 1001 on the movable mechanism moves over the sample tube 501, extracts the water sample, and injects it into the photometer (installed in the first drawer 1201) via a syringe pump.

[0045] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A fully automatic total phosphorus and total nitrogen analyzer that facilitates sample tube cooling, characterized by: The invention comprises a rack (101) and a fully automatic digestion pot (201), a sample rack (301), a cooling fan (401), a liquid adding mechanism and a moving mechanism for moving sample tubes (501), all of which are arranged on the rack (101); a plurality of sample tubes (501) are placed on the sample rack (301); a control mechanism is arranged on the rack (101) at the sample rack (301); a placement plate (601) is arranged at the execution end of the control mechanism; the sample rack (301) and the placement plate (601) are detachably connected; the cooling fan (401) is arranged near the edge of the sample rack (301).

2. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 1, characterized in that: The control mechanism includes a frame (701) arranged on the frame (101), a turntable (702) rotatably connected to the frame (701), at least two support rods (703) arranged parallel and spaced on the turntable (702), a driving mechanism and a lifting mechanism both arranged on the frame (701), wherein one end of any support rod (703) away from the turntable (702) is connected to the placement plate (601); the driving mechanism is used to drive the turntable (702) to rotate; and the lifting mechanism is transmission-connected to the placement plate (601).

3. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 2, characterized in that: Any of the support rods (703) includes a first sleeve (7031) and a slide rod (7032) that are slidably connected to each other, the end of the first sleeve (7031) away from the slide rod (7032) is connected to the turntable (702), and the end of the slide rod (7032) away from the first sleeve (7031) is connected to the placement plate (601); the lifting mechanism includes a first motor (704) arranged on the frame (701), a screw rod (705) that is transmission-connected to the driving end of the first motor (704), and a second sleeve (706) that is threadedly connected to the screw rod (705), and the end of the second sleeve (706) away from the screw rod (705) is connected to the bearing of the placement plate (601); the central axis of the first sleeve (7031), the central axis of the slide rod (7032), the central axis of the screw rod (705) and the central axis of the second sleeve (706) are parallel to each other.

4. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 2, characterized in that: The driving mechanism comprises a second motor (708) arranged on the frame (701) and a driving gear (709) arranged at the driving end of the second motor (708); a gear ring adapted to the driving gear (709) is arranged on the circumference of the turntable (702); the driving gear (709) and the gear ring are meshed with each other.

5. The fully automatic total phosphorus and total nitrogen analyzer that facilitates sample tube cooling according to claim 1, characterized in that: The liquid adding mechanism comprises a PPU mechanism (801) arranged on the frame (101), a reagent arm (802) transmission-connected to the execution end of the PPU mechanism (801), and a clamping mechanism (803) arranged on the frame (101).

6. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 5, characterized in that: The moving mechanism comprises an X-axis moving mechanism (901) arranged on the frame (101), a Y-axis moving mechanism (902) transmission-connected to the execution end of the X-axis moving mechanism (901), a Z-axis moving mechanism (903) transmission-connected to the execution end of the Y-axis moving mechanism (902), and a rotating clamping claw mechanism (803) arranged at the execution end of the Z-axis moving mechanism (903).

7. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 6, characterized in that: The execution end of the Z-axis moving mechanism (903) is further provided with a liquid collection needle (1001).

8. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 7, characterized in that: A needle washing pool (1101) is provided on the frame (101).

9. The fully automatic total phosphorus and total nitrogen analyzer for facilitating sample tube cooling according to claim 1, characterized in that: The frame (101) is provided with a first drawer (1201) for storing a photometer.

10. The fully automatic total phosphorus and total nitrogen analyzer that facilitates sample tube cooling according to claim 1, characterized in that: The frame (101) is provided with a second drawer (1301) for storing bottle caps.

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