Graphite furnace atomic absorption spectrophotometer

Abstract

The utility model discloses a graphite furnace atomic absorption spectrophotometer, which comprises a shell and a flame atomizer, the shell is provided with a movable door capable of being opened and closed, the movable door is detachably connected with a heat dissipation mechanism, the heat dissipation mechanism comprises a heat dissipation frame, a protective cover, an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are oppositely installed on the front face and the back face of the protective cover, the heat dissipation frame is arranged in the shell, and the protective cover is connected and fixed to the movable door in an inserted mode. According to the flame graphite furnace, through the arranged heat dissipation mechanism, heat dissipation can be conveniently carried out on a combustion area in the flame graphite furnace, a combustor in the flame atomizer is prevented from damaging a shell of the photometer, through the protective cover, the air inlet pipe and the air outlet pipe, dissipation of the temperature above the combustor can be conveniently accelerated, and meanwhile through the detachable heat dissipation mechanism, the heat dissipation efficiency is improved. And the atomic absorption spectrophotometer can be conveniently assembled with the spectrophotometer and the heat dissipation mechanism can be conveniently maintained, so that the atomic absorption spectrophotometer has heat dissipation and protection effects.

Description

Technical Field

[0001] This utility model relates to the field of testing instrument technology, specifically a graphite furnace atomic absorption spectrophotometer. Background Technology

[0002] The graphite furnace atomic absorption spectrophotometer is a commonly used analytical instrument used to determine the concentration of metal elements in a solution. The working principle of the graphite furnace atomic absorption spectrophotometer is to first evaporate the metal elements in the sample solution into a high-temperature graphite furnace, and then pass a beam of light of a specific wavelength generated by a light source through the sample in the graphite furnace. The change in the intensity of absorbed light is detected, and the concentration of the metal element in the sample can be calculated based on the degree of decrease in light intensity.

[0003] A spectrophotometer, also known as a spectrometer, is a scientific instrument that breaks down complex light into spectral lines. Different light sources have their own unique emission spectra, so different light-emitting bodies can be used as the instrument's light source.

[0004] Common spectrophotometers include flame atomic absorption spectrometers and graphite furnace atomic absorption spectrometers. Flame graphite furnace atomic absorption spectrometers utilize the high temperature generated by the combustion of combustible gas to atomize the sample in the graphite tube. The equipment has a simple structure and low maintenance cost. However, due to the high temperature of the flame graphite furnace, the movable door is not closed when testing the sample. After the burner burns, the temperature in the upper space does not dissipate for a long time, making it inconvenient to close the movable door in a timely manner. Therefore, we designed a graphite furnace atomic absorption spectrophotometer with heat dissipation function. Utility Model Content

[0005] The purpose of this invention is to provide a graphite furnace atomic absorption spectrophotometer to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a graphite furnace atomic absorption spectrophotometer, comprising a shell and a flame atomizer, wherein the shell is provided with an openable and closable movable door, and a heat dissipation mechanism is detachably connected to the movable door, the heat dissipation mechanism comprising a heat dissipation frame, a protective cover, an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe being installed opposite each other on the front and back of the protective cover, the heat dissipation frame being disposed inside the shell, the protective cover being inserted into and fixed to the movable door, and the lower end of the protective cover passing through the movable door and being sealed and connected to the heat dissipation frame.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Preferably, the heat dissipation frame is provided with multiple spaced heat dissipation fins on the side near the protective cover. By providing multiple inclined heat dissipation fins, it is convenient to dissipate heat from the rising hot gas during combustion in the flame atomizer and guide it, so that the hot gas undergoes preliminary heat dissipation.

[0009] Preferably, the protective cover is connected to connecting plates on both sides by a pivot, and locking bolts are threaded onto the connecting plates. The protective cover is connected and fixed to the movable door by the connecting plates and locking bolts. By setting the connecting plates, it is easy to flip the connecting plates and store them inside the protective cover, which facilitates the subsequent separation of the protective cover from the movable door, and also facilitates the quick assembly and fixing of the protective cover to the movable door by the connecting plates.

[0010] Preferably, a diversion pipe is provided between the air inlet pipe and the air outlet pipe and the protective cover, and a baffle plate is provided on the inner top wall of the protective cover. By setting the baffle plate inside the protective cover, the airflow can play a wave-like air-guiding effect when passing through the inside of the protective cover, so that the gas carries away more heat from the inside of the protective cover during the movement, thereby drawing in the heat from the bottom of the protective cover.

[0011] Preferably, the top of the heat dissipation frame is snapped onto the bottom of the protective cover, and the connection between the heat dissipation frame and the protective cover is fixed by fixing bolts. By setting a detachable heat dissipation frame and protective cover, it is convenient to replace and maintain the heat dissipation fins inside the heat dissipation frame.

[0012] Preferably, the protective cover is provided with a plurality of spaced heat-conducting rods, which are arranged horizontally. By providing a plurality of heat-conducting rods inside the protective cover, it is easy to divert the rising hot air. At the same time, the heat-conducting rods are made of carbon steel, which facilitates the subsequent upward airflow to carry away the hot air.

[0013] Preferably, the diverter tube is composed of multiple telescopic tubes, and the protective cover is provided with multiple interfaces that are adapted to the port of the diverter tube. One end of the diverter tube is sleeved and fixed to the protective cover. By setting the snap-fit ​​diverter tube, it is easy to disassemble and assemble the air pipe and the protective cover, and it is also easy to divert and concentrate the airflow.

[0014] Preferably, one side of the movable door is connected to the outer casing via a damping pivot, and the other side of the movable door is engaged with the outer casing. A handle is provided at the bottom of the side of the movable door, and the inclined surface of the movable door is made of glass. By providing a movable door, it is convenient to observe the combustion of the flame inside the instrument, and it is also convenient to prevent external debris from affecting the collection of internal research data.

[0015] Preferably, the protective cover and the heat dissipation frame are both positioned above the burner in the flame atomizer. The flame atomizer includes a burner and a graphite tube is installed inside the burner. The orientation of the graphite tube is the same as the emission orientation of the instrument's light source. The spectrophotometer includes a hollow cathode lamp light source, a flame atomizer, a monochromator, and a detector, which facilitates the analysis of metal elements by utilizing the characteristic radiation absorption of the ground-state atomic vapor of the material in the graphite tube.

[0016] Beneficial effects

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] This invention, through its heat dissipation mechanism, facilitates heat dissipation from the combustion zone in the flame graphite furnace, preventing damage to the spectrophotometer's casing from the burner in the flame atomizer. The protective cover, air inlet pipe, and air outlet pipe facilitate rapid dissipation of the temperature above the burner. Simultaneously, the heat dissipation mechanism allows for timely closure of the movable door. Furthermore, the heat dissipation mechanism is easy to assemble with the spectrophotometer and easy to maintain, thus enabling the atomic absorption spectrophotometer to achieve both heat dissipation and protection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the orthographic section of the present invention;

[0020] Figure 2 This is a top view of the structure of this utility model;

[0021] Figure 3 for Figure 1 Enlarged structural diagram at point A in the middle.

[0022] In the diagram: 1. Outer shell; 2. Flame atomizer; 3. Movable door; 4. Heat sink frame; 5. Protective cover; 6. Air outlet duct; 7. Air inlet duct; 8. Heat sink fins; 9. Connecting plate; 10. Diverter duct; 11. Baffle plate; 12. Heat conduction rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-3This utility model provides a technical solution: a graphite furnace atomic absorption spectrophotometer, including a shell 1 and a flame atomizer 2. The shell 1 is provided with an openable and closable movable door 3. One side of the movable door 3 is connected to the shell 1 through a damping pivot, and the other side of the movable door 3 is engaged with the shell 1. A handle is provided at the bottom of the side of the movable door 3, and the inclined surface of the movable door 3 is made of glass. By providing a movable door 3, it is convenient to observe the combustion of the flame inside the instrument, and it is also convenient to prevent external debris from affecting the collection of internal research data.

[0025] A heat dissipation mechanism is detachably connected to the movable door 3. The heat dissipation mechanism includes a heat dissipation frame 4, a protective cover 5, an air inlet pipe 7, and an air outlet pipe 6. The air inlet pipe 7 and the air outlet pipe 6 are installed opposite each other on the front and back of the protective cover 5. A diversion pipe 10 is provided between the air inlet pipe 7 and the air outlet pipe 6 and the protective cover 5. The diversion pipe 10 is composed of multiple telescopic pipes. The protective cover 5 is provided with multiple interfaces that are adapted to the ports of the diversion pipe 10. One end of the diversion pipe 10 is sleeved and fixed to the protective cover 5. By setting the snap-fit ​​diversion pipe 10, it is easy to disassemble and assemble the air pipe and the protective cover 5, and it is also easy to divert and concentrate the airflow.

[0026] Furthermore, the inner top wall of the protective cover 5 is provided with a baffle plate 11. By setting the baffle plate 11 inside the protective cover 5, the airflow can achieve a wave-like air-guiding effect when passing through the inside of the protective cover 5, so that the gas carries away more heat from inside the protective cover 5 during the movement, thereby drawing in the heat at the bottom of the protective cover 5.

[0027] The protective cover 5 is provided with a plurality of spaced heat-conducting rods 12, which are arranged horizontally. By providing a plurality of heat-conducting rods 12 inside the protective cover 5, it is easy to divert the rising hot air. At the same time, the heat-conducting rods 12 are made of carbon steel, which facilitates the subsequent upward airflow to carry away the hot air.

[0028] The heat dissipation frame 4 is located inside the outer shell 1. The protective cover 5 is inserted into and fixed to the movable door 3. The lower end of the protective cover 5 passes through the movable door 3 and is sealed to the heat dissipation frame 4. The heat dissipation frame 4 is provided with multiple spaced heat dissipation fins 8 on the side near the protective cover 5. By providing multiple inclined heat dissipation fins 8, it is convenient to dissipate heat from the rising hot gas during combustion in the flame atomizer 2 and guide it, so that the hot gas undergoes preliminary heat dissipation.

[0029] The top of the heat dissipation frame 4 is snapped onto the bottom of the protective cover 5, and the connection between the heat dissipation frame 4 and the protective cover 5 is fixed by fixing bolts. By setting the detachable heat dissipation frame 4 and the protective cover 5, it is convenient to replace and maintain the heat dissipation fins 8 inside the heat dissipation frame 4.

[0030] Furthermore, the protective cover 5 is connected to the two sides by a pivot plate 9, and the connecting plate 9 is threaded with a locking bolt. The protective cover 5 is connected and fixed to the movable door 3 by the connecting plate 9 and the locking bolt. By setting the connecting plate 9, it is easy to flip the connecting plate 9 and store it inside the protective cover 5, which facilitates the subsequent separation of the protective cover 5 from the movable door 3, and also facilitates the quick assembly and fixation of the protective cover 5 to the movable door 3 by the connecting plate 9.

[0031] The protective cover 5 and the heat dissipation frame 4 are both located above the burner in the flame atomizer 2. The flame atomizer 2 includes a burner and a graphite tube is installed inside the burner. The orientation of the graphite tube is the same as the emission orientation of the instrument light source. The spectrophotometer includes a hollow cathode lamp light source, the flame atomizer 2, a monochromator, and a detector, which facilitates the analysis of metal elements by utilizing the characteristic radiation absorption of the ground-state atomic vapor of the material in the graphite tube.

[0032] In this embodiment, the heat dissipation mechanism facilitates heat dissipation from the combustion area in the flame graphite furnace, preventing the burner in the flame atomizer 2 from damaging the photometer's outer casing 1. The protective cover 5, air inlet pipe 7, and air outlet pipe 6 facilitate faster dissipation of the temperature above the burner. At the same time, the detachable heat dissipation mechanism facilitates assembly with the spectrophotometer and maintenance of the heat dissipation mechanism, thereby enabling the atomic absorption spectrophotometer to have both heat dissipation and protection effects.

[0033] The mechanisms, components, and parts in this utility model that are not specifically described are all existing structures that already exist in the prior art and can be purchased directly from the market.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A graphite furnace atomic absorption spectrophotometer comprising a housing (1) and a flame atomizer (2), said housing (1) being provided with a hingedly openable door (3), characterized in that: The movable door (3) is detachably connected with a heat dissipation mechanism, the heat dissipation mechanism comprises a heat dissipation frame (4), a protective cover (5), an air inlet pipe (7) and an air outlet pipe (6), the air inlet pipe (7) and the air outlet pipe (6) are oppositely installed on the front and back surfaces of the protective cover (5), the heat dissipation frame (4) is arranged in the inside of the shell (1), the protective cover (5) is inserted and fixed on the movable door (3), and the lower end of the protective cover (5) penetrates through the movable door (3) and is sealingly connected to the heat dissipation frame (4).

2. A graphite furnace atomic absorption spectrophotometer according to claim 1, characterized in that: The heat dissipation frame (4) is obliquely provided with a plurality of heat dissipation fins (8) which are spaced apart on one side close to the protective cover (5).

3. A graphite furnace atomic absorption spectrophotometer according to claim 1, wherein: The protective cover (5) is connected with a connecting plate (9) through a rotating shaft on both sides, and a locking bolt is threadedly connected on the connecting plate (9), and the protective cover (5) is connected and fixed with the movable door (3) through the connecting plate (9) and the locking bolt.

4. A graphite furnace atomic absorption spectrophotometer according to claim 1, wherein: The air inlet pipe (7) and the air outlet pipe (6) are provided with a shunt pipe (10) between the connection with the protective cover (5), and the inner top wall of the protective cover (5) is provided with a flow resistance plate (11).

5. A graphite furnace atomic absorption spectrophotometer according to claim 1, wherein: The top of the heat dissipation frame (4) is clamped to the bottom of the protective cover (5), and the connecting part of the heat dissipation frame (4) and the protective cover (5) is fixed by a fixing bolt.

6. A graphite furnace atomic absorption spectrophotometer according to claim 1, characterized in that: The inside of the protective cover (5) is provided with a plurality of heat-conducting rods (12) which are spaced apart, and the plurality of heat-conducting rods (12) are horizontally arranged.

7. A graphite furnace atomic absorption spectrophotometer according to claim 4, wherein: The shunt pipe (10) is composed of a plurality of telescopic pipes, a plurality of interfaces adapted to the ports of the shunt pipe (10) are arranged on the protective cover (5), and one end of the shunt pipe (10) is fixedly sleeved with the protective cover (5).

8. A graphite furnace atomic absorption spectrophotometer according to claim 1, wherein: One side of the movable door (3) is connected with the shell (1) through a damping rotating shaft, and the other side of the movable door (3) is clamped with the shell (1), a handle is arranged on the side bottom of the movable door (3), and the inclined surface of the movable door (3) is arranged as a glass layer.

9. A graphite furnace atomic absorption spectrophotometer according to claim 1, wherein: The protective cover (5) and the heat dissipation frame (4) are arranged above the burner in the flame atomizer (2).

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