Nitrogen purging device with heating function

Abstract

The utility model belongs to the technical field of industrial production, and particularly relates to a nitrogen purging device with a heating function. The gas distribution assembly comprises a heating cavity mounting plate, a gas pipe elbow, a first distribution partition plate, a second distribution partition plate and a third distribution partition plate, the first distribution partition plate, the second distribution partition plate and the third distribution partition plate are arranged at the lower end of the heating cavity mounting plate, and the gas heating assembly is connected with the heating cavity and located at the lower end of the third distribution partition plate; an air pipe elbow is installed at the upper end of the heating cavity installation plate, an air inlet is formed in the air pipe elbow, and the air inlet, the first flow dividing partition plate, the second flow dividing partition plate, the third flow dividing partition plate and the gas heating assembly communicate in sequence. The oxygen-free concentration device is simple in structure and convenient to operate, gas outlet is more uniform, the gas flow speed is more stable, nitrogen can be rapidly heated and continuously and controllably blown to the surface of a sample, a solvent in the to-be-treated sample is rapidly evaporated and separated, oxygen-free concentration of the sample is achieved, meanwhile, the sample can be kept pure, and the rapid separation and purification effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of industrial production, and particularly relates to a nitrogen purging device with heating function. Background Art

[0002] Nitrogen purging is a device that blows nitrogen onto the surface of a heated sample for sample concentration and separation. It has the characteristics of time-saving, convenient operation, and easy control, and can quickly obtain the expected results. It is widely used in industries such as pesticide residue analysis, commodity inspection, food, environment, pharmaceuticals, biological products, etc., and in sample preparation for liquid phase, gas phase, and mass spectrometry analysis.

[0003] However, during the use of the nitrogen purging device, nitrogen needs to be split into multiple nitrogen needles, and then each nitrogen needle separately concentrates a sample. The existing nitrogen drying instrument directly passes nitrogen into the device where the nitrogen needles are installed. This device does not have a multi-stage splitting structure. The nitrogen needles near the air inlet hole receive a larger amount of nitrogen and a higher gas flow rate, resulting in different concentration effects. Therefore, it is necessary to design a nitrogen purging device with heating function to solve the above problems. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a nitrogen purging device with heating function to solve the problems raised in the above background art.

[0005] To achieve the above object, the utility model provides the following technical solution: A nitrogen purging device with heating function, comprising a heating cavity, a gas splitting component, and a gas heating component. The gas heating component and the gas splitting component are sequentially arranged in the heating cavity from bottom to top.

[0006] The gas splitting component includes a heating cavity mounting plate, a tracheal elbow, a first splitting partition, a second splitting partition, and a third splitting partition. The first splitting partition, the second splitting partition, and the third splitting partition are sequentially arranged at the lower end of the heating cavity mounting plate. The gas heating component is connected to the heating cavity and is located below the third splitting partition.

[0007] The tracheal elbow is installed at the upper end of the heating cavity mounting plate, and an air inlet is opened on the tracheal elbow. The air inlet, the first splitting partition, the second splitting partition, the third splitting partition, and the gas heating component are sequentially connected.

[0008] Further, a first stepped groove is opened on the lower end surface of the first splitting partition, two second stepped grooves are opened on the upper end surface of the second splitting partition, and six third stepped grooves are opened on the upper end surface of the third splitting partition. The first stepped groove communicates with the two second stepped grooves, and one second stepped groove communicates with the three third stepped grooves.

[0009] Further, a wire outlet is provided on the heating chamber mounting plate.

[0010] Further, the gas heating assembly includes a heating bottom plate and filters. A plurality of filter mounting holes are evenly provided on the heating bottom plate, and the filters are arranged in the plurality of filter mounting holes.

[0011] Further, the gas heating assembly further includes a heating film, a thermistor, a thermistor tube sleeve, and a temperature control switch. The heating film is pasted on the upper end surface of the heating bottom plate. A thermistor mounting hole is provided on the side surface of the heating bottom plate, and the thermistor tube sleeve and the thermistor are arranged in the thermistor mounting hole. A temperature control switch mounting groove is provided on the upper end surface of the heating bottom plate, and the temperature control switch is arranged in the temperature control switch mounting groove.

[0012] Further, the gas heating assembly further includes a heating sheet. The heating sheet is located between the heating film and the third shunt partition plate and is connected to the heating film. A plurality of bosses are evenly distributed on the upper end surface of the heating sheet, and air outlet small holes are provided at the gaps between two adjacent bosses on the heating sheet.

[0013] Further, the heated nitrogen purging device further includes a thimble plate, a silica gel gasket, a silica gel pressing frame, and air outlet steel needles. The thimble plate is arranged in the heating cavity. The silica gel pressing frame is arranged at the lower end of the heating cavity. The silica gel gasket is arranged in the silica gel pressing frame. The air outlet steel needles sequentially pass through the silica gel pressing frame and the silica gel gasket and are connected to the thimble plate.

[0014] Technical effects and advantages of the present utility model:

[0015] 1. By providing the first shunt partition plate, the second shunt partition plate, and the third shunt partition plate, multi-level shunting can be realized, so that the heated nitrogen purging device has the characteristics of more uniform air outlet and more stable gas flow rate, which is beneficial to quickly heating, continuously and controllably blowing nitrogen onto the surface of the sample, quickly evaporating and separating the solvent in the sample to be processed, thereby realizing anaerobic concentration of the sample, and at the same time, being able to keep the sample pure, so as to achieve the effect of rapid separation and purification.

[0016] Other features and advantages of the present utility model will be described in the subsequent description, and some of them will become obvious from the description or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the structures pointed out in the description and the drawings. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 Shows the structural schematic diagram of the heating nitrogen purging device according to the embodiment of the present invention;

[0019] Figure 2 Shows the exploded structural schematic diagram of the heating nitrogen purging device according to the embodiment of the present invention;

[0020] Figure 3 Shows the exploded structural schematic diagram of the gas shunt assembly according to the embodiment of the present invention;

[0021] Figure 4 Shows the structural schematic diagram of the heating chamber mounting plate according to the embodiment of the present invention;

[0022] Figure 5 Shows the structural schematic diagram of the first shunt partition according to the embodiment of the present invention;

[0023] Figure 6 Shows the exploded structural schematic diagram of the gas heating assembly according to the embodiment of the present invention;

[0024] Figure 7 Shows the structural schematic diagram of the heating bottom plate according to the embodiment of the present invention;

[0025] Figure 8 Shows the structural schematic diagram of the heating sheet according to the embodiment of the present invention;

[0026] Figure 9 Shows the structural schematic diagram of the gas outlet steel needle according to the embodiment of the present invention;

[0027] Figure 10 Shows the exploded structural schematic diagram of the heating nitrogen purging device according to the embodiment of the present invention.

[0028] Reference numerals: 1, heating cavity; 11, first sealing groove; 12, second sealing groove; 2, gas flow splitting assembly; 21, heating cavity mounting plate; 211, fourth step groove; 212, wire outlet; 22, tracheal elbow; 23, first flow splitting partition; 231, first step groove; 24, second flow splitting partition; 241, second step groove; 25, third flow splitting partition; 251, third step groove; 3, gas heating assembly; 31, heating bottom plate; 311, filter mounting hole; 312, thermistor mounting hole; 313, temperature control switch mounting groove; 32, filter; 33, heating film; 34, thermistor; 35, thermistor tube sleeve; 36, temperature control switch; 37, temperature control switch pressing piece; 38, heating sheet; 381, boss; 382, air outlet small hole; 41, ejector pin plate; 42, silicone gasket; 43, silicone pressing frame; 44, air outlet steel needle; 45, first O-ring; 46, second O-ring. Detailed implementation manners

[0029] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. 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.

[0030] As Figures 1 to 3 and Figure 10 shown, a nitrogen purging device with heating of an embodiment of the present utility model includes a heating cavity 1, a gas flow splitting assembly 2 and a gas heating assembly 3. The gas heating assembly 3 and the gas flow splitting assembly 2 are sequentially arranged in the heating cavity 1 from bottom to top;

[0031] The gas flow splitting assembly 2 includes a heating cavity mounting plate 21, a tracheal elbow 22, a first flow splitting partition 23, a second flow splitting partition 24 and a third flow splitting partition 25. The first flow splitting partition 23, the second flow splitting partition 24 and the third flow splitting partition 25 are sequentially arranged at the lower end of the heating cavity mounting plate 21. The gas heating assembly 3 is connected to the heating cavity 1 and is located at the lower end of the third flow splitting partition 25;

[0032] The tracheal elbow 22 is mounted at the upper end of the heating cavity mounting plate 21. An air inlet is formed in the tracheal elbow 22. The air inlet, the first flow splitting partition 23, the second flow splitting partition 24, the third flow splitting partition 25 and the gas heating assembly 3 are sequentially communicated.

[0033] Specifically, the first flow-dividing partition 23, the second flow-dividing partition 24, and the third flow-dividing partition 25 are tightly fixed on the heating chamber mounting plate 21 step by step by 6 M3x16 socket head cap screws to form an integral state.

[0034] In this embodiment, nitrogen is introduced through the tracheal elbow 22. The nitrogen passes through the first flow-dividing partition 23, the second flow-dividing partition 24, and the third flow-dividing partition 25 in sequence, and finally makes the nitrogen evenly enter the gas heating assembly 3. Thus, by setting the first flow-dividing partition 23, the second flow-dividing partition 24, and the third flow-dividing partition 25, multi-level flow division can be achieved, making the nitrogen blowing device with heating have the characteristics of more uniform air outlet and more stable gas flow rate, which is beneficial to quickly heating, continuously and controllably blowing nitrogen towards the surface of the sample, rapidly evaporating and separating the solvent in the sample to be processed, thereby realizing anaerobic concentration of the sample. At the same time, the purity of the sample can be maintained, thus achieving the effect of rapid separation and purification.

[0035] Optionally, as Figure 3 and Figure 5 shown, a first stepped groove 231 is formed on the lower end surface of the first flow-dividing partition 23, two second stepped grooves 241 are formed on the upper end surface of the second flow-dividing partition 24, six third stepped grooves 251 are formed on the upper end surface of the third flow-dividing partition 25, the first stepped groove 231 communicates with the two second stepped grooves 241, and one of the second stepped grooves 241 communicates with the three third stepped grooves 251.

[0036] Specifically, the first stepped groove 231 is set to be elongated, the second stepped groove 241 is set to be triangular, and the third stepped groove 251 is set to be rectangular. Secondly, as Figure 4 shown, a fourth stepped groove 211 is formed on the lower end surface of the heating chamber mounting plate 21, and the fourth stepped groove 211 communicates with the first stepped groove 231 and the air inlet.

[0037] In this embodiment, when nitrogen enters the first stepped groove 231, it can flow into the two second stepped grooves 241 respectively, and then flow into the six third stepped grooves 251 respectively from the two stepped grooves, so that the first flow-dividing partition 23, the second flow-dividing partition 24, and the third flow-dividing partition 25 perform multi-level flow division on nitrogen.

[0038] Optionally, as Figure 3 shown, a wire outlet 212 is formed on the heating chamber mounting plate 21.

[0039] In this embodiment, by forming the wire outlet 212 on the mounting plate of the heating chamber 1, it can be used for the wire outlet of the internal structure of the gas heating assembly 3 inside the heating chamber 1.

[0040] Optionally, as Figure 6 、Figure 8 and Figure 10 As shown in Figure 10 , the gas heating assembly 3 includes a heating bottom plate 31 and a filter 32. A plurality of filter mounting holes 311 are evenly formed in the heating bottom plate 31, and the filter 32 is disposed in each of the plurality of filter mounting holes 311.

[0041] Specifically, there are 96 filter mounting holes 311.

[0042] In this embodiment, by forming a plurality of filter mounting holes 311 in the heating bottom plate 31 and disposing the filter 32 in each filter mounting hole 311, impurities or other contaminants in the gas can be filtered out before the nitrogen gas exits, avoiding contamination.

[0043] Optionally, as shown in Figure 8 and Figure 10 As shown in Figure 10 , the gas heating assembly 3 further includes a heating film 33, a thermistor 34, a thermistor sleeve 35, and a temperature control switch 36. The heating film 33 is pasted on the upper end surface of the heating bottom plate 31. A thermistor mounting hole 312 is formed in the side surface of the heating bottom plate 31, and the thermistor sleeve 35 and the thermistor 34 are disposed in the thermistor mounting hole 312. A temperature control switch mounting groove 313 is formed in the upper end surface of the heating bottom plate 31, and the temperature control switch 36 is disposed in the temperature control switch mounting groove 313.

[0044] In this embodiment, by pasting the heating film 33 on the upper end surface of the heating bottom plate 31 and respectively forming a thermistor mounting hole 312 and a temperature control switch mounting groove 313 in the heating bottom plate 31, the thermistor sleeve 35, the thermistor 34, and the temperature control switch 36 can be respectively mounted, facilitating the formation of the gas heating assembly 3 into a whole. Secondly, the heating bottom plate 31, the heating film 33, the temperature control switch 36, the temperature control switch pressing piece 37, the thermistor 34, the thermistor sleeve 35, and the heating sheet 38 form a heating assembly. The heating film 33 serves as a gas heating heat source and is pasted on the heating bottom plate 31. At the same time, a temperature control switch 36 and a thermistor 34 are mounted on the heating bottom plate 31. The temperature control switch 36 is connected in series with the heating film 33 to the main control board of the control unit, while the thermistor 34 is separately connected to the main control board of the control unit; through the cooperation of the thermistor 34 and the temperature control switch 36, the temperature of the gas in the heating cavity 1 can be monitored in real time. The heating assembly will implement automatic heating when the temperature of the gas in the heating cavity 1 is lower than the set value according to the temperature parameter requirements set by the system control module; when the temperature of the gas in the heating cavity 1 reaches the set value, it will automatically disconnect, so that the temperature of the gas in the heating cavity 1 can be kept constant all the time.

[0045] Optionally, as shown in Figure 7As shown, the gas heating assembly 3 further includes a heating sheet 38. The heating sheet 38 is located between the heating film 33 and the third flow dividing partition 25 and is connected to the heating film 33. A plurality of bosses 381 are evenly distributed on the upper end surface of the heating sheet 38, and air outlet small holes 382 are formed at the gaps between two adjacent bosses 381 on the heating sheet 38.

[0046] In this embodiment, the bosses 381 on the heating sheet 38 adopt a three-dimensional columnar structure, and the air outlet holes are formed between the gaps of the respective bosses 381. Compared with other heating structural parts on the market, this structural part has the advantages of shorter nitrogen heating-up time and more stable temperature.

[0047] Optionally, as Figure 9 and Figure 10 shown, the nitrogen gas purging device with heating further includes a thimble plate 41, a silica gel gasket 42, a silica gel pressing frame 43 and an air outlet steel needle 44. The thimble plate 41 is arranged in the heating cavity 1, the silica gel pressing frame 43 is arranged at the lower end of the heating cavity 1, the silica gel gasket 42 is arranged in the silica gel pressing frame 43, and the air outlet steel needle 44 sequentially passes through the silica gel pressing frame 43 and the silica gel gasket 42 and is connected to the thimble plate 41.

[0048] Specifically, 96 air outlet steel needles 44 are provided, corresponding to 96 filters 32 respectively. Secondly, as Figure 10 shown, a first sealing groove 11 and a second sealing groove 12 are formed in the heating cavity 1 for installing a first O-ring 45 and a second O-ring 46 respectively. Among them, the first O-ring 45 is arranged at the connection between the heating cavity mounting plate 21 and the heating cavity 1, and the second O-ring 46 is arranged at the connection between the heating bottom plate 31 and the heating cavity 1.

[0049] In this embodiment, by arranging the thimble plate 41, the silica gel gasket 42 and the silica gel pressing frame 43, it is convenient to install the air outlet steel needle 44.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. It should be particularly noted that in this embodiment, the number of nitrogen needles is 96, which is only one of the embodiments, and the number of nitrogen needles can be set according to actual requirements, such as 24, 32, 48, 96, 192, etc. Different number settings should all be included in the protection scope of this application.

Claims

1. A heating nitrogen purging device, characterized in that, It includes a heating cavity (1), a gas shunt assembly (2), and a gas heating assembly (3). The gas heating assembly (3) and the gas shunt assembly (2) are sequentially arranged in the heating cavity (1) from bottom to top; The gas shunt assembly (2) includes a heating cavity mounting plate (21), a tracheal elbow (22), a first shunt partition plate (23), a second shunt partition plate (24), and a third shunt partition plate (25). The first shunt partition plate (23), the second shunt partition plate (24), and the third shunt partition plate (25) are sequentially arranged at the lower end of the heating cavity mounting plate (21). The gas heating assembly (3) is connected to the heating cavity (1) and is located at the lower end of the third shunt partition plate (25); The tracheal elbow (22) is installed at the upper end of the heating cavity mounting plate (21). An air inlet is provided on the tracheal elbow (22). The air inlet, the first shunt partition plate (23), the second shunt partition plate (24), the third shunt partition plate (25), and the gas heating assembly (3) are sequentially connected.

2. The nitrogen purging device with heating according to claim 1, characterized in that, A first stepped groove (231) is provided on the lower end face of the first shunt partition plate (23). Two second stepped grooves (241) are provided on the upper end face of the second shunt partition plate (24). Six third stepped grooves (251) are provided on the upper end face of the third shunt partition plate (25). The first stepped groove (231) communicates with the two second stepped grooves (241). One second stepped groove (241) communicates with the three third stepped grooves (251).

3. The nitrogen purging device with heating according to claim 1, wherein, A wire outlet (212) is provided on the heating cavity mounting plate (21).

4. The nitrogen purging device with heating according to claim 1, characterized in that The gas heating assembly (3) includes a heating bottom plate (31) and a filter (32). A plurality of filter mounting holes (311) are evenly provided on the heating bottom plate (31). The filter (32) is provided in each of the plurality of filter mounting holes (311).

5. The nitrogen purging device with heating according to claim 4, wherein The gas heating assembly (3) further includes a heating film (33), a thermistor (34), a thermistor tube sleeve (35), and a temperature control switch (36). The heating film (33) is pasted on the upper end face of the heating bottom plate (31). A thermistor mounting hole (312) is provided on the side surface of the heating bottom plate (31). The thermistor tube sleeve (35) and the thermistor (34) are provided in the thermistor mounting hole (312). A temperature control switch mounting groove (313) is provided on the upper end face of the heating bottom plate (31). The temperature control switch (36) is provided in the temperature control switch mounting groove (313).

6. The nitrogen purging device with heating according to claim 5, wherein The gas heating assembly (3) further includes a heating sheet (38). The heating sheet (38) is located between the heating film (33) and the third shunt partition plate (25) and is connected to the heating film (33). A plurality of bosses (381) are evenly distributed on the upper end face of the heating sheet (38). Air outlet small holes (382) are provided at the gaps between two adjacent bosses (381) on the heating sheet (38).

7. The nitrogen purging device with heating according to claim 1, wherein The nitrogen purge device with heating further includes a thimble plate (41), a silica gel gasket (42), a silica gel pressing frame (43), and an air outlet steel needle (44). The thimble plate (41) is arranged in the heating cavity (1), the silica gel pressing frame (43) is arranged at the lower end of the heating cavity (1), the silica gel gasket (42) is arranged in the silica gel pressing frame (43), and the air outlet steel needle (44) sequentially passes through the silica gel pressing frame (43) and the silica gel gasket (42) and is connected to the thimble plate (41).

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