Full-automatic digestion pot convenient for mounting sample rack

Abstract

The utility model discloses a full-automatic digestion pot convenient to install a sample rack, which relates to the technical field of scientific instruments, a connecting shaft is arranged at the bottom of the sample rack, and the digestion pot comprises a pot body assembly and a positioning column, the pot body assembly comprises a pot body, a cover turning mechanism arranged on one side of the pot body, a swing arm connected with the execution end of the cover turning mechanism, a pot cover rotationally connected with the swing arm and a screwing mechanism arranged on the swing arm, the pot cover can be buckled at the opening end of the pot body, and the execution end of the screwing mechanism is in transmission connection with the pot cover; a positioning hole matched with the connecting shaft is formed in the positioning column, and a fixing mechanism used for fixing the connecting shaft in the positioning hole is arranged on the positioning column. A positioning column is installed in a pot body, a positioning hole is formed in the positioning column, and a connecting shaft can be rapidly fixed in the positioning hole through a fixing mechanism (namely, a sample frame can be rapidly fixed in the pot body); after the digestion work is finished, the sample frame can be quickly taken out and quickly assembled and disassembled, so that the digestion work efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scientific instruments, in particular to a full-automatic digestion pot which is convenient for installing a sample rack. Background Art

[0002] Phosphorus and nitrogen are the main elements contributing to eutrophication in water bodies. Eutrophication affects water quality and can 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. Determination of total phosphorus and total nitrogen 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 automatic digestion vessel with automatic lid opening and closing, heating, and water addition and drainage has been designed to significantly reduce labor intensity and provide safety and efficiency.

[0003] When using a digestion pot to digest samples, several digestion tubes (digestion tubes are used to store samples to be digested) are generally installed on the sample rack first, then the samples are injected into the digestion tubes, and finally the sample rack is fixed in the digestion pot to start the digestion work.

[0004] However, in the prior art, the sample rack is generally placed directly in the digestion pot without any temporary fixing measures. When encountering vibration, the sample rack containing several digestion tubes may shift or tilt, affecting the normal progress of the digestion work.

[0005] Therefore, a fully automatic digestion pot which is convenient for installing a sample rack is proposed. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a fully automatic digestion pot that is convenient for installing a sample rack.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A fully automatic digestion pot that is easy to install a sample rack. A connecting shaft is provided at the bottom of the sample rack. The digestion pot includes a pot body assembly and a positioning column arranged at the inner bottom of the above-mentioned pot body. The above-mentioned pot body assembly includes a pot body, a flip cover mechanism arranged on one side of the above-mentioned pot body, a swing arm connected to the execution end of the above-mentioned flip cover mechanism, a pot cover rotatably connected to the above-mentioned swing arm, and a tightening mechanism provided on the above-mentioned swing arm. The above-mentioned pot cover can be buckled into the open end of the above-mentioned pot body, and the execution end of the above-mentioned tightening mechanism is transmission-connected to the above-mentioned pot cover; the above-mentioned positioning column is provided with a positioning hole adapted for the above-mentioned connecting shaft, and the above-mentioned positioning column is provided with a fixing mechanism for fixing the above-mentioned connecting shaft in the above-mentioned positioning hole.

[0009] Furthermore, in the present invention, two limiting holes are symmetrically arranged on the above-mentioned connecting shaft, and the two limiting holes are symmetrical about the central axis of the above-mentioned connecting shaft; the above-mentioned fixing mechanism includes a connecting rod slidably arranged in the above-mentioned positioning hole and two telescopic rods symmetrically arranged on both sides of the above-mentioned positioning hole, and the sliding direction of the above-mentioned connecting rod is parallel to the central axis of the above-mentioned positioning hole; the telescopic direction of the two telescopic rods is toward the above-mentioned positioning hole; the two ends of the above-mentioned connecting rod are connected to the two telescopic rods by two pull ropes; when the above-mentioned connecting shaft is extended into the above-mentioned positioning hole, the two telescopic rods can be extended into the two limiting holes.

[0010] Furthermore, in the present invention, two slideways are symmetrically disposed on either side of the positioning hole, communicating with the positioning hole. The two telescopic rods are disposed within the two slideways, respectively. Each telescopic rod comprises a spring and a push rod connected in sequence, with the spring end remote from the push rod connected to the slideway. The push rod end remote from the spring faces the positioning hole. The pull cord end remote from the connecting rod is connected to the push rod.

[0011] Furthermore, in the present invention, two fixed pulleys are symmetrically provided on both sides of the positioning hole, and any of the fixed pulleys is rotatably connected to the positioning column; and the middle portion of any of the pull ropes is wound around the corresponding fixed pulley.

[0012] Furthermore, in the present invention, a avoidance groove adapted to the push rod is provided on the connecting shaft, the avoidance groove is communicated with the limiting hole, and one end of the avoidance groove faces one end of the connecting shaft away from the sample rack.

[0013] Furthermore, in the present invention, a water inlet and a drain outlet are provided on the pot body. A water inlet valve is provided at the water inlet, and a drain valve is provided at the drain outlet.

[0014] Furthermore, in the present invention, an exhaust pipe is provided on the pot body, and the exhaust pipe is connected to an exhaust valve.

[0015] Furthermore, in the present invention, a liquid level sensor is provided in the pot body.

[0016] Furthermore, in the present invention, a temperature sensor is provided in the pot body.

[0017] Furthermore, in the present invention, a heating tube is provided in the pot body.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a fully automatic digestion pot which is convenient for installing a sample rack. A positioning column is installed inside the pot body, and a positioning hole is provided on the positioning column. A connecting shaft can be quickly fixed in the positioning hole by a fixing mechanism (that is, the sample rack can be quickly fixed in the pot body); after the digestion work is completed, the sample rack can be quickly taken out, and the sample rack is quickly installed and removed, thereby improving the efficiency of the digestion work. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0021] Figure 2 This is a schematic structural diagram of an embodiment of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 4 This is a schematic structural diagram of the fixing mechanism of an embodiment of the present utility model;

[0024] Figure 5 This is a structural schematic diagram of an embodiment of the utility model in which the connecting shaft is fixed in the positioning hole.

[0025] In the figure: 101-sample rack; 102-connecting shaft; 201-pot body; 202-flip mechanism; 203-swing arm; 204-pot lid; 205-tightening mechanism; 301-positioning column; 3011-positioning hole; 401-connecting rod; 402-pull rope; 403-spring; 404-push rod; 405-fixed pulley; 501-avoidance groove; 601-water inlet; 602-drain outlet; 603-water inlet valve; 604-drain valve; 701-exhaust valve; 801-liquid level sensor; 901-heating tube. DETAILED DESCRIPTION

[0026] 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.

[0027] See also Figure 1-5 , the utility model provides a technical solution:

[0028] A fully automatic digestion pot is provided for facilitating installation of a sample rack. A connecting shaft 102 is installed at the bottom of the sample rack 101. The sample rack 101 can store 42 digestion tubes at the same time, which means that the digestion of 42 samples can be completed at the same time.

[0029] The digestion pot includes a pot body assembly and a positioning column 301 installed at the bottom of the pot body 201. The pot body assembly includes the pot body 201, a flip cover mechanism 202 installed on one side of the pot body 201, a swing arm 203 connected to the execution end of the flip cover mechanism 202, a pot cover 204 rotatably connected to the swing arm 203, and a tightening mechanism 205 installed on the swing arm 203. The pot cover 204 can be snapped onto the open end of the pot body 201, and the execution end of the tightening mechanism 205 is transmission-connected to the pot cover 204; a positioning hole 3011 adapted to the connecting shaft 102 is opened on the positioning column 301, and a fixing mechanism for fixing the connecting shaft 102 in the positioning hole 3011 is installed on the positioning column 301.

[0030] In this embodiment, the flip mechanism 202 includes a lid opening and closing motor and a switch position detection photoelectric device mounted on one side of the pot body 201. A swing arm 203 is mounted on the drive shaft of the lid opening and closing motor, and the switch position detection photoelectric device is mounted at a corresponding position on the pot body 201. When the sample begins to perform a digestion task, the lid opening and closing motor operates to control the swing arm 203 to swing, thereby driving the lid 204 to flip. When the lid 204 rotates to a closed position relative to the pot body 201, the lid opening and closing photoelectric device is triggered, causing the lid 204 to stop flipping.

[0031] In this embodiment, the tightening mechanism 205 includes a lid 204 tightening motor, a transmission mechanism, and a lid 204 tightening position detection photoelectric device, all of which are mounted on the swing arm 203. The transmission mechanism includes a driving wheel mounted on the drive shaft of the lid 204 tightening motor and a driven wheel coaxially connected to the lid 204. The driving wheel and the driven wheel are both synchronous wheels, and the two are connected by a timing belt. After the lid 204 stops turning, the lid 204 tightening motor starts to drive the lid 204 to rotate. When the lid 204 rotates to the closed position, the lid 204 tightening position detection photoelectric device is triggered, indicating that the lid 204 is tightened, thereby stopping the rotational movement.

[0032] Reference Figure 4 and Figure 5 In this embodiment, two limiting holes are symmetrically provided on the connecting shaft 102, and the two limiting holes are symmetrical about the central axis of the connecting shaft 102. A cavity is machined inside the positioning column 301 according to the design to facilitate the installation of the fixing mechanism. Specifically, the fixing mechanism includes a connecting rod 401 slidably installed in the positioning hole 3011 and two telescopic rods symmetrically installed on both sides of the positioning hole 3011. The extension direction of the connecting rod 401 is perpendicular to the central axis of the positioning hole 3011, and the sliding direction of the connecting rod 401 is parallel to the central axis of the positioning hole 3011. The telescopic directions of the two telescopic rods are perpendicular to the central axis of the positioning hole 3011; the two ends of the connecting rod 401 are connected to the two telescopic rods by two pull ropes 402; when the connecting shaft 102 is inserted into the positioning hole 3011, the two telescopic rods can be inserted into the two limiting holes.

[0033] To facilitate the installation of the two telescopic rods, two symmetrically connected slideways are provided on either side of the positioning hole 3011. The central axes of the two slideways are perpendicular to the central axis of the positioning hole 3011, and the two telescopic rods are respectively placed in the two slideways. Specifically, each telescopic rod comprises a spring 403 and a push rod 404 connected in sequence. The end of the spring 403 away from the push rod 404 is connected to the slideway. The end of the push rod 404 away from the spring 403 faces the positioning hole 3011. The end of the pull cord 402 away from the connecting rod 401 is connected to the push rod 404.

[0034] In order to facilitate the support of the pull rope 402 and the push rod 404 to drive the two telescopic rods to extend and retract, two fixed pulleys 405 are symmetrically installed on both sides of the positioning hole 3011. Any fixed pulley 405 is rotatably connected to the positioning column 301; the middle part of any pull rope 402 is wound around the corresponding fixed pulley 405.

[0035] When the connecting shaft 102 is fixed in the positioning hole 3011, the two push rods 404 are inserted into the two limiting holes. When the connecting shaft 102 needs to be taken out from the positioning hole 3011, the parts of the two push rods 404 located in the limiting holes will hinder the removal of the connecting shaft 102. Figure 5 The connecting shaft 102 is provided with an avoidance groove 501 adapted to the push rod 404 . The avoidance groove 501 is connected to the limiting hole, and one end of the avoidance groove 501 faces the end of the connecting shaft 102 away from the sample rack 101 .

[0036] In this embodiment, the pot body 201 is also equipped with supporting facilities, including a water inlet 601 and a drain outlet 602 at the bottom of the pot body 201. The water inlet 601 is equipped with a water inlet valve 603, and the drain outlet 602 is equipped with a drain valve 604. An exhaust pipe is also installed at an appropriate position on the pot body 201, connecting the interior of the pot body 201 with the outside world. An exhaust valve 701 is installed at one end of the exhaust pipe, located outside the pot body 201. Furthermore, a pressure sensor is installed on the outer wall of the pot body 201 to control the operation of the exhaust valve 701. The pressure sensor continuously monitors the air pressure inside the pot, thereby controlling the opening and closing of the exhaust valve 701. Two liquid level sensors 801 are installed within the pot body 201 to simultaneously detect high and low liquid levels. When the liquid level is high, water replenishment is stopped, and when the liquid level is low, water replenishment is automatic. To simultaneously monitor the temperature inside the pot, a temperature sensor (not shown) is installed within the pot body 201. In order to heat the water in the pot body 201, a heating pipe 901 is installed in the pot body 201. Through the above design, the digestion pot can realize automatic opening and closing of the lid; automatically complete the digestion process; monitor the temperature and pressure in the pot in real time; automatically fill and drain the water; monitor the water level in the pot; and automatically vent.

[0037] Working principle:

[0038] Before starting digestion, several digestion tubes containing samples are installed on the sample rack 101, and then the connecting shaft 102 is inserted into the positioning hole 3011 on the positioning column 301, and then the connecting shaft 102 is fixed in the positioning hole 3011 by the fixing mechanism.

[0039] Reference Figure 4 When the connecting shaft 102 is not inserted into the positioning hole 3011, the ends of the two push rods 404 close to the positioning hole 3011 are retracted into the slideway under the action of the elastic force of the two springs 403 until the two springs 403 are in a balanced state.

[0040] from Figure 4 and Figure 5From a perspective of FIG, before the connecting shaft 102 is inserted into the positioning hole 3011 and contacts the connecting rod 401, the ends of the two push rods 404 near the positioning hole 3011 are retracted into the two slideways, so the two push rods 404 do not hinder the downward movement of the connecting shaft 102. After the connecting shaft 102 contacts the connecting rod 401, it continues to move toward the bottom of the positioning hole 3011. During this process, the two push rods 404 move toward the positioning hole 3011 under the tension of the two pull ropes 402. After one end of the two push rods 404 extends into the two limiting holes, the connecting shaft 102 can no longer move toward the bottom of the positioning hole 3011. At this time, the pressure generated by the weight of the connecting shaft 102 and the sample rack 101 acts on the connecting rod 401, and the connecting rod 401, through the pull ropes 402, keeps the two push rods 404 in contact with the two limiting holes, thereby fixing the connecting shaft 102 in the positioning hole 3011.

[0041] After the sample rack 101 is secured within the pot body 201, the pot lid 204 begins to flip under the influence of the lid opening and closing motor. When the pot lid 204 rotates to a position closed with the pot body 201, the lid opening and closing position detection photoelectric sensor is triggered, causing the pot lid 204 to stop flipping. The pot lid 204 tightening motor then begins to rotate the pot lid 204. When the pot lid 204 rotates to the closed position, the lid 204 tightening position detection photoelectric sensor is triggered, indicating that the pot lid 204 is tightened, thereby stopping the rotation.

[0042] When the pot lid 204 automatically closes, the water inlet valve 603 opens, and an external water pump automatically pumps water into the pot body 201. When the liquid level reaches a preset height, the liquid level sensor 801 is triggered, stopping water addition. In this embodiment, two liquid level sensors 801 are installed at the bottom of the pot body 201 to simultaneously detect high and low liquid levels. Water replenishment stops when the liquid level is high, and automatically replenishes water when the liquid level is low. To drain the water from the pot, simply open the drain valve 604. When the water level reaches the predetermined height, the heating tube 901 begins operating and continues to heat the water to 120 degrees Celsius. During this process, a pressure sensor continuously monitors the air pressure inside the pot, controlling the opening and closing of the exhaust valve 701. A temperature sensor also simultaneously monitors the temperature inside the pot, and in conjunction with an external temperature controller, enables precise temperature control within the pot.

[0043] When the digestion work is completed, the exhaust valve 701 will automatically open, causing the air pressure in the pot to continue to drop. When the air pressure in the pot is balanced with the external atmospheric pressure, the pot cover 204 will automatically open again, thus completing a complete digestion work.

[0044] After the digestion work is completed, the sample rack 101 needs to be taken out. At this time, the sample rack 101 is pulled upward, and the ends of the two push rods 404 are gradually retracted into the two slideways under the squeezing action of the two avoidance grooves 501, so that the connecting shaft 102 can be separated from the positioning hole 3011.

[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 digestion pot that is convenient for installing a sample rack, wherein a connecting shaft (102) is provided at the bottom of the sample rack (101), characterized in that: include: A pot assembly, comprising a pot body (201), a flip cover mechanism (202) disposed on one side of the pot body (201), a swing arm (203) connected to an execution end of the flip cover mechanism (202), a pot cover (204) rotatably connected to the swing arm (203), and a tightening mechanism (205) disposed on the swing arm (203), wherein the pot cover (204) can be fastened to the open end of the pot body (201), and the execution end of the tightening mechanism (205) is transmission-connected to the pot cover (204); A positioning column (301) is provided at the bottom of the pot body (201), wherein a positioning hole (3011) adapted to the connecting shaft (102) is provided on the positioning column (301), and a fixing mechanism for fixing the connecting shaft (102) in the positioning hole (3011) is provided on the positioning column (301).

2. The fully automatic digestion pot convenient for installing a sample rack according to claim 1, characterized in that: Two limiting holes are symmetrically provided on the connecting shaft (102), and the two limiting holes are symmetrical about the central axis of the connecting shaft (102); the fixing mechanism comprises a connecting rod (401) slidably provided in the positioning hole (3011) and two telescopic rods symmetrically provided on both sides of the positioning hole (3011), the sliding direction of the connecting rod (401) is parallel to the central axis of the positioning hole (3011); the telescopic directions of the two telescopic rods are toward the positioning hole (3011); the two ends of the connecting rod (401) are connected to the two telescopic rods by two pull ropes (402); when the connecting shaft (102) is extended into the positioning hole (3011), the two telescopic rods can be extended into the two limiting holes.

3. The fully automatic digestion pot convenient for installing a sample rack according to claim 2, characterized in that: Two slideways connected to the positioning hole (3011) are symmetrically arranged on both sides thereof, and the two telescopic rods are respectively arranged in the two slideways; any of the telescopic rods comprises a spring (403) and a push rod (404) connected in sequence, and one end of the spring (403) away from the push rod (404) is connected to the slideway; one end of the push rod (404) away from the spring (403) faces the positioning hole (3011); and one end of the pull rope (402) away from the connecting rod (401) is connected to the push rod (404).

4. The fully automatic digestion pot convenient for installing a sample rack according to claim 3, characterized in that: Two fixed pulleys (405) are symmetrically arranged on both sides of the positioning hole (3011), and any of the fixed pulleys (405) is rotatably connected to the positioning column (301); and the middle portion of any of the pull ropes (402) is wound around the corresponding fixed pulley (405).

5. The fully automatic digestion pot convenient for installing a sample rack according to claim 3, characterized in that: The connecting shaft (102) is provided with an avoidance groove (501) adapted to the push rod (404), the avoidance groove (501) is communicated with the limiting hole, and one end of the avoidance groove (501) faces toward the end of the connecting shaft (102) away from the sample rack (101).

6. The fully automatic digestion pot convenient for installing a sample rack according to claim 1, characterized in that: The pot body (201) is provided with a water inlet (601) and a water outlet (602), the water inlet (601) is provided with a water inlet valve (603), and the water outlet (602) is provided with a water outlet valve (604).

7. The fully automatic digestion pot convenient for installing a sample rack according to claim 1, characterized in that: An exhaust pipe is provided on the pot body (201), and the exhaust pipe is connected to an exhaust valve (701).

8. The fully automatic digestion pot convenient for installing a sample rack according to claim 1, characterized in that: A liquid level sensor (801) is provided in the pot body (201).

9. The fully automatic digestion pot convenient for installing a sample rack according to claim 1, characterized in that: A temperature sensor is provided in the pot body (201).

10. The fully automatic digestion pot convenient for installing a sample rack according to claim 1, characterized in that: A heating tube (901) is provided in the pot body (201).

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