Full-automatic azotometer

Abstract

The utility model belongs to the technical field of azotometers, and provides a full-automatic azotometer which comprises an azotometer body and a control module, a distiller and a condenser are arranged in the azotometer body, a protection assembly and a detection piece are arranged on the outer side of the azotometer body, the protection assembly comprises a sealing piece, the sealing piece comprises a digestion head, and the digestion head is connected with the control module. The digestion head is fixedly installed on the inner side of the azotometer body, a steam pipe is arranged in the digestion head, one end of the steam pipe is connected with a distiller in the azotometer body, a pipe pressing rod is further arranged in the digestion head, a piston is fixedly installed at the bottom of the pipe pressing rod, and a spring is arranged on the outer side of the pipe pressing rod. The test tube opening of a sample to be detected is placed under the digestion head, the steam tube is located in the test tube, the tube pressing rod is pushed to protrude out of the digestion head through gradual extension of the spring, and the test tube opening is blocked through contact between the piston and the test tube opening, so that the detection work is not influenced while the sealing performance of the device is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen analyzers, in particular to a fully automatic nitrogen analyzer. Background Art

[0002] A fully automatic nitrogen analyzer is an instrument used to determine the nitrogen content in samples, and is widely used in fields such as agriculture, food, environment, and chemistry. The fully automatic nitrogen analyzer realizes the efficient and accurate determination of the nitrogen content in samples through automated operations of digestion, distillation, and titration.

[0003] The fully automatic nitrogen analyzer is based on the Kjeldahl method and combines automation technology to automate the sample processing process. The Chinese patent with the authorized announcement number CN219245471U discloses a fully automatic Kjeldahl nitrogen analyzer. It is convenient to add a mixed indicator into the boric acid container placed at the bottom of the distillate tube through the addition block, so it is not necessary to remove the boric acid container to complete the addition, which is convenient to use and saves the operation process. However, before detection, the sample needs to be heated together with concentrated sulfuric acid and a catalyst (such as selenium, potassium sulfate, etc.). However, due to the different heights of the test tubes containing the samples, the digestion port responsible for heating cannot well seal the test tubes, so that when the device is heating, the heating gas is likely to diffuse, affecting the use safety. Moreover, due to the different models of the test tubes, the test tubes are prone to shift during the heating process, resulting in the contact between the high-temperature steam tube and the test tubes, causing the test tubes to break.

[0004] In summary, the current fully automatic nitrogen analyzer still has the following defects during the installation and use process at the user end:

[0005] (1) Due to the different heights of the test tubes containing the samples, the digestion port responsible for heating cannot well seal the test tubes, so that when the device is heating, the heating gas is likely to diffuse, affecting the use safety;

[0006] (2) Due to the different models of the test tubes, the test tubes are prone to shift during the heating process, resulting in the contact between the high-temperature steam tube and the test tubes, causing the test tubes to break. Summary of the Utility Model

[0007] In order to overcome the defects of the above-mentioned prior art pointed out, the inventor of the present invention has conducted in-depth research and completed the present utility model after a large amount of creative labor.

[0008] Specifically, the technical problem to be solved by the present utility model is: to provide a fully automatic nitrogen determination instrument to solve the problems of the current fully automatic nitrogen determination instrument. Since the heights of the test tubes containing samples are different, the digestion ports responsible for heating cannot seal the test tubes well, so that when the device is heating, the heating gas is likely to diffuse, affecting the use safety. And due to the different models of the test tubes, the test tubes are likely to shift during the heating process, resulting in the contact between the high-temperature steam pipe and the test tube, causing the test tube to break.

[0009] To solve the above technical problems, the technical solution of the present utility model is:

[0010] A fully automatic nitrogen determination instrument includes a nitrogen determination instrument body and a control module. A distiller and a condenser are arranged in the nitrogen determination instrument body, and a protection component and a detection component are arranged on the outer side of the nitrogen determination instrument body;

[0011] The protection component includes a sealing member. The sealing member includes a digestion head. The digestion head is fixedly installed inside the nitrogen determination instrument body. A steam pipe is arranged in the digestion head. One end of the steam pipe is connected to the distiller in the nitrogen determination instrument body;

[0012] A pressure pipe rod is also arranged in the digestion head. A piston is fixedly installed at the bottom of the pressure pipe rod. The inner diameter of the inner circle of the pressure pipe rod is the same as the inner diameter of the inner circle of the piston and is larger than the diameter of the steam pipe;

[0013] A spring is arranged on the outer side of the pressure pipe rod, and the spring is located on the top of the piston. The pressure pipe rod is movably connected in the digestion head through the spring.

[0014] As an improved technical solution, a sealing gasket is fixedly installed at the bottom of the piston, and a stop block is fixedly installed on the other side of the piston. The stop block is movably connected in the digestion head.

[0015] As an improved technical solution, an air bag body is still arranged in the piston. The air bag body is connected to an air delivery module through a hose. The air delivery module is fixedly installed in the nitrogen determination instrument body.

[0016] As an improved technical solution, the protection component further includes a positioning member. The positioning member includes a column. The column is fixedly installed inside the nitrogen determination instrument body. A U-shaped frame is fixedly installed at the top of the column. Pipe clamps are movably connected to both sides of the U-shaped frame. The pipe clamps are threadedly connected to the U-shaped frame through first screws.

[0017] As an improved technical solution, a first positioning ring and a second positioning ring are respectively arranged at the top of the pipe clamp, and the first positioning ring is located between the pipe clamp and the second positioning ring. A deflection shaft is hinged to one side of the first positioning ring, and the other end of the deflection shaft is hinged to a slider. The second positioning ring is fixedly installed on the outer side of the slider, and the slider is threadedly connected to the column through a second screw.

[0018] As an improved technical solution, the detection member includes a condensate pipe, one end of the condensate pipe is connected to a condenser in the Kjeldahl apparatus body, and an absorption liquid pipe and a detection probe are further arranged on the outer side of the condensate pipe. The detection probe is electrically connected to the control module through an electrical signal.

[0019] As an improved technical solution, the detection member further includes a liquid supply module, which is filled with pure water, standard acid solution and standard alkali solution respectively. The liquid supply module is connected to the Kjeldahl apparatus body through a proportioning valve pipe.

[0020] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0021] (1) When using this fully automatic Kjeldahl apparatus, by placing the mouth of the test tube to be detected directly below the digestion head, and the steam pipe is located in the test tube. Through the gradual extension of the spring, the pressing pipe rod is pushed out from the digestion head, and the mouth of the test tube is blocked by the contact of the piston with the mouth of the test tube, which not only ensures the sealing performance of the device but also does not affect the detection work.

[0022] (2) By rotating the second screw, the threaded slider moves in the groove of the column, driving the second positioning ring to move synchronously. At the same time, the first positioning ring is squeezed through the deflection shaft, so that the test tube is not easily loosened and fallen off, thus avoiding the test tube from shifting and contacting the steam pipe during the detection process, resulting in the breakage of the test tube.

[0023] (3) Titration is realized through the absorption liquid pipe, so as to mix the receiving liquid condensed by the condensate pipe connected to the condenser in the Kjeldahl apparatus body, and the detection probe detects the amount of standard acid consumed during the titration process, and the control module calculates to obtain the nitrogen content in the sample, thereby making the detection process more accurate and efficient. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0025] Figure 1 Structural schematic diagram of the full-automatic nitrogen determinator of the present utility model;

[0026] Figure 2 Cross-sectional structural schematic diagram of the full-automatic nitrogen determinator of the present utility model;

[0027] Figure 3 Structural schematic diagram of the protection component of the full-automatic nitrogen determinator of the present utility model;

[0028] Figure 4 Structural schematic diagram of the positioning member of the full-automatic nitrogen determinator of the present utility model;

[0029] Figure 5 Structural schematic diagram of the detection member of the full-automatic nitrogen determinator of the present utility model;

[0030] Reference numerals: 1, nitrogen determinator body; 2, control module; 3, protection component; 31, sealing member; 311, digestion head; 312, steam pipe; 313, pressure pipe rod; 314, piston; 315, spring; 316, sealing gasket; 317, stop block; 318, airbag body; 319, gas transmission module; 32, positioning member; 321, column; 322, U-shaped frame; 323, pipe clamp; 324, first screw; 325, first positioning ring; 326, second positioning ring; 327, deflection shaft; 328, slider; 329, second screw; 4, detection member; 41, condensate pipe; 42, absorption liquid pipe; 43, detection probe; 44, liquid supply module; 45, ratio valve pipe. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0033] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution where A and B are satisfied simultaneously.

[0034] In addition, in the present utility model, descriptions such as "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] As Figures 1 to 5 As commonly shown, this embodiment provides an automatic nitrogen determinator, which includes a nitrogen determinator body 1 and a control module 2. A distiller and a condenser are provided in the nitrogen determinator body 1. A protection component 3 and a detector 4 are arranged outside the nitrogen determinator body 1. The protection component 3 includes a sealing member 31. The sealing member 31 includes a digestion head 311. The digestion head 311 is fixedly installed inside the nitrogen determinator body 1. A steam pipe 312 is arranged in the digestion head 311. One end of the steam pipe 312 is connected to the distiller in the nitrogen determinator body 1. A pressure pipe rod 313 is also arranged in the digestion head 311. A piston 314 is fixedly installed at the bottom of the pressure pipe rod 313. The inner diameter of the pressure pipe rod 313 is the same as the inner diameter of the piston 314 and is larger than the diameter of the steam pipe 312. A spring 315 is arranged outside the pressure pipe rod 313, and the spring 315 is located at the top of the piston 314. The pressure pipe rod 313 is movably connected in the digestion head 311 through the spring 315. The distiller in the nitrogen determinator body 1 and the steam pipe 312 cooperate to complete the digestion and distillation functions of the test sample. The inner diameters of the pressure pipe rod 313 and the piston 314 can ensure that the steam pipe 312 at a higher temperature does not contact the pressure pipe rod 313 and the piston 314, thus ensuring the use safety. When the spring 315 is in the extended state, it pushes the pressure pipe rod 313 to protrude from the digestion head 311, so as to block the test sample test tube opening on the nitrogen determinator body 1 through the piston 314, while ensuring the sealing performance of the device and not affecting the detection work.

[0036] A sealing gasket 316 is fixedly installed at the bottom of the piston 314. A stopper 317 is fixedly installed on the other side of the piston 314. The stopper 317 is movably connected in the digestion head 311, and the cross-section of the stopper 317 is L-shaped. The sealing gasket 316 can provide sealing when the size of the test sample test tube opening is larger than that of the piston 314. The stopper 317 can move in the groove in the digestion head 311 and help the pressure pipe rod 313 to reset, and always keep the groove in the digestion head 311 closed to the outside during the movement to avoid gas leakage.

[0037] An airbag body 318 is still provided in the piston 314. The airbag body 318 is connected to an air supply module 319 through a hose. The air supply module 319 is fixedly installed in the Kjeldahl apparatus body 1. When the mouth of the test tube for the sample to be detected has a relatively large diameter, the airbag body 318 can be supplied with air through the air supply module 319 connected by the hose, and the mouth of the test tube can be blocked by the expansion of the airbag body 318. During the expansion process, the airbag body 318 does not contact the steam pipe 312.

[0038] The protection component 3 further includes a positioning member 32. The positioning member 32 includes a column 321. The column 321 is fixedly installed inside the Kjeldahl apparatus body 1. A U-shaped frame 322 is fixedly installed at the top of the column 321. Pipe clamps 323 are movably connected to both sides of the U-shaped frame 322. The pipe clamps 323 are threadedly connected to the U-shaped frame 322 through first screw rods 324. The column 321 is arranged parallel to the steam pipe 312. The pipe clamps 323 can approach each other by rotating the first screw rods 324 connected by threads, and fix the test tube parallel to the column 321.

[0039] First positioning rings 325 and second positioning rings 326 are respectively arranged at the tops of the pipe clamps 323, and the first positioning ring 325 is located between the pipe clamp 323 and the second positioning ring 326. A deflection shaft 327 is hinged to one side of the first positioning ring 325. The other end of the deflection shaft 327 is hinged to a slider 328. The second positioning ring 326 is fixedly installed outside the slider 328. The slider 328 is threadedly connected to the column 321 through a second screw rod 329. The first positioning ring 325 and the second positioning ring 326 can cooperate with the pipe clamps 323 to position the test tube. When the second screw rod 329 rotates, the slider 328 moves in the groove of the column 321 and drives the second positioning ring 326 to move synchronously. At the same time, the first positioning ring 325 is squeezed through the deflection shaft 327, so that the test tube is not easily loosened and fallen off.

[0040] The detection component 4 includes a condensate pipe 41. One end of the condensate pipe 41 is connected to the condenser in the Kjeldahl apparatus body 1. An absorption liquid pipe 42 and a detection probe 43 are further arranged outside the condensate pipe 41. The detection probe 43 is electrically connected to the control module 2. The condensate pipe 41 can cooperate with the steam pipe 312 to complete the condensation of the detection gas. The absorption liquid pipe 42 can titrate the condensate with a standard acid solution. The detection probe 43 can feed back the detection data to the control module 2, and the control module 2 calculates the nitrogen content in the sample based on the titration result.

[0041] The detection component 4 further includes a liquid supply module 44. The liquid supply module 44 is respectively filled with pure water, standard acid solution and standard alkali solution. The liquid supply module 44 is connected to the Kjeldahl apparatus body 1 through a proportioning valve pipe 45. The liquids in the liquid supply module 44 are all mixed and prepared in the Kjeldahl apparatus body 1 through the proportioning valve pipe 45 to obtain the corresponding concentration of acidic liquid required for use, so that the detection process is more accurate and efficient.

[0042] During use, by placing the mouth of the test tube containing the sample to be detected directly below the digestion head 311 and with the steam pipe 312 located in the test tube, as the spring 315 gradually extends, it pushes the pressure tube rod 313 to protrude from the digestion head 311, and seals the mouth of the test tube through the contact of the piston 314 with the mouth of the test tube. During this process, since the diameters of the pressure tube rod 313 and the piston 314 are larger than the diameter of the steam pipe 312, the steam pipe 312 at a higher temperature does not contact the pressure tube rod 313 and the piston 314. The distiller in the Kjeldahl apparatus main body 1 connected through the steam pipe 312 oxidizes the organic nitrogen in the sample in the test tube to be detected and converts it into ammonium ions. And by heating the digested sample through the distillation unit, the ammonium ions are converted into ammonia gas. The ammonia gas enters the Kjeldahl apparatus main body 1 through the piston 314 and the pressure tube rod 313, and the stop block 317 helps the pressure tube rod 313 to reset. And during the movement, the groove in the digestion head 311 is always closed to the outside to prevent gas leakage. When the mouth of the test tube is relatively large, the air supply module 319 connected by a hose supplies air to the airbag body 318, causing the airbag body 318 to expand. The expansion of the airbag body 318 seals the mouth of the test tube, and during the expansion process, the airbag body 318 does not contact the steam pipe 312, which not only ensures the tightness of the device but also does not affect the detection work. When placing the test tube, by rotating the corresponding first screw rod 324, the clamp 323 connected by threads approaches each other inside the U-shaped frame 322 to clamp and fix the top of the test tube. And by rotating the second screw rod 329, the slider 328 connected by threads moves in the groove of the column 321 and drives the second positioning ring 326 to move synchronously. At the same time, the first positioning ring 325 is squeezed through the deflection shaft 327, so that the test tube is not easily loosened and fallen off, thus avoiding the test tube from shifting and contacting the steam pipe 312 during the detection process, causing the test tube to break. And the liquid in the liquid supply module 44 is transported to the Kjeldahl apparatus main body 1 through the proportioning valve pipe 45 for proportioning preparation to obtain a standard acidic liquid with a corresponding concentration, and titration is achieved through the absorption liquid pipe 42, so as to mix with the receiving liquid condensed by the condensate pipe 41 connected to the condenser in the Kjeldahl apparatus main body 1, and the amount of standard acid consumed during the titration process is detected by the detection probe 43, and calculated by the control module 2, so as to obtain the nitrogen content in the sample, and further make the detection process more accurate and efficient.

[0043] It should be understood that the uses of these embodiments are only for illustrating the present utility model and are not intended to limit the protection scope of the present utility model. In addition, it should also be understood that after reading the technical content of the present utility model, those skilled in the art can make various changes, modifications, and / or variations to the present utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. A fully automatic nitrogen analyzer, comprising a nitrogen analyzer body (1) and a control module (2), wherein the nitrogen analyzer body (1) is provided with a distiller and a condenser, characterized in that: A protective component (3) and a detection component (4) are arranged on the outside of the nitrogen analyzer body (1); The protection component (3) comprises a sealing member (31), the sealing member (31) comprises a digestion head (311), the digestion head (311) is fixedly mounted on the inner side of the nitrogen analyzer body (1), a steam pipe (312) is arranged in the digestion head (311), and one end of the steam pipe (312) is connected to a distiller in the nitrogen analyzer body (1); A pipe pressing rod (313) is also provided in the digestion head (311), a piston (314) is fixedly mounted on the bottom of the pipe pressing rod (313), and the inner diameter of the pipe pressing rod (313) is the same as the inner diameter of the piston (314) and is larger than the diameter of the steam pipe (312); A spring (315) is provided on the outside of the tube pressing rod (313), and the spring (315) is located on the top of the piston (314). The tube pressing rod (313) is movably connected to the digestion head (311) via the spring (315).

2. The fully automatic nitrogen analyzer according to claim 1, characterized in that: A sealing gasket (316) is fixedly mounted on the bottom of the piston (314), and a stopper (317) is fixedly mounted on the other side of the piston (314), wherein the stopper (317) is movably connected in the digestion head (311).

3. The fully automatic nitrogen analyzer according to claim 2, characterized in that: The piston (314) is also provided with an air bag body (318), and the air bag body (318) is connected to a gas supply module (319) via a hose, and the gas supply module (319) is fixedly installed in the nitrogen analyzer body (1).

4. The fully automatic nitrogen analyzer according to claim 1, characterized in that: The protection assembly (3) further comprises a positioning member (32), wherein the positioning member (32) comprises a column (321), wherein the column (321) is fixedly mounted on the inner side of the nitrogen analyzer body (1), a U-shaped frame (322) is fixedly mounted on the top of the column (321), and pipe clamps (323) are movably connected to both sides of the U-shaped frame (322), and the pipe clamps (323) are threadedly connected to the U-shaped frame (322) via a first screw (324).

5. The fully automatic nitrogen analyzer according to claim 4, characterized in that: A first positioning ring (325) and a second positioning ring (326) are respectively provided at the top of the pipe clamp (323), and the first positioning ring (325) is located between the pipe clamp (323) and the second positioning ring (326). A deflection shaft (327) is hinged on one side of the first positioning ring (325), and a slider (328) is hinged on the other end of the deflection shaft (327). The second positioning ring (326) is fixedly mounted on the outside of the slider (328), and the slider (328) is threadedly connected to the column (321) via a second screw rod (329).

6. The fully automatic nitrogen analyzer according to claim 1, characterized in that: The detection element (4) comprises a condensate tube (41), one end of the condensate tube (41) being connected to a condenser in the nitrogen analyzer body (1), an absorption liquid tube (42) and a detection probe (43) being further arranged on the outside of the condensate tube (41), and the detection probe (43) being connected to the control module (2) via an electrical signal.

7. The fully automatic nitrogen analyzer according to claim 6, characterized in that: The detection component (4) further comprises a liquid supply module (44), wherein the liquid supply module (44) is respectively filled with pure water, standard acid solution and standard alkali solution, and the liquid supply module (44) is connected to the nitrogen analyzer body (1) via a proportioning valve tube (45).

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