A graphite plate heater

Abstract

The present invention discloses a graphite plate type heater, which relates to the technical field of graphite heaters, including a box body, fixed power supply devices are fixedly installed on the upper and lower surfaces of the box body, protective gas devices are arranged on the left and right sides of the box body, a sealing cover is fixedly installed on the front surface of the box body, and the box body includes a box side wall, an upper graphite plate is movably installed on the upper ends of the left and right surfaces inside the box side wall, and a lower graphite plate is fixedly installed on the lower end of the box side wall. The present invention solves the problem of insufficient internal space of the graphite tube heater by replacing the graphite tube with a graphite plate. At the same time, the graphite plate is easier to process than the graphite tube, and the processing cost is low and the processing process is simple. An upper keel frame and a lower keel frame are added, and the strength of the upper graphite plate and the lower graphite plate is increased by the upper keel frame and the lower keel frame, so as to prevent the upper graphite plate and the lower graphite plate from breaking due to excessive internal pressure, causing heating termination and gas leakage.

Description

Technical Field

[0001] The invention relates to a graphite heater, and relates to the technical field of graphite heaters, and in particular to a graphite plate heater. Background Art

[0002] The graphite heater is to quantitatively inject the sample into the heater with an injector, and use graphite as a resistance heating element. After power is turned on, the temperature rises rapidly to atomize the sample. It consists of a heating power supply, a protective gas control system and a graphite furnace. The external power supply is applied to both ends of the graphite to supply energy to the atomizer. The current passes through the graphite to generate a temperature of up to 3000°C, which turns the measured element placed in the graphite into ground state atomic vapor. The existing technology has the following problems:

[0003] 1. Most of the existing graphite heaters are tubular heaters. Since graphite itself is a brittle material, the processing of graphite tubes is difficult, and it is not easy to manufacture graphite tubes with thicker diameters. The processing cost is high, the technology is complex and difficult to achieve;

[0004] 2. Graphite is a brittle material, and the graphite heater has no protective measures for the graphite plate. When used in a heating furnace, the graphite plate is easily broken and shattered due to the internal air pressure, affecting the heating process and causing gas leakage. Summary of the invention

[0005] The present invention provides a graphite plate type heater, one purpose of which is to have the effect of easy processing and solve the problems of high cost and difficult processing; another purpose is to solve the problem that the graphite plate is easy to break and fracture, so as to achieve the effect of protecting the graphite plate and increasing its strength.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A graphite plate heater, comprising a box, wherein fixed power supply devices are fixedly installed on the upper and lower surfaces of the box, protective gas devices are arranged on the left and right sides of the box, and a sealing cover is fixedly installed on the front surface of the box;

[0008] The box body comprises a box side wall, an upper graphite plate is movably mounted on the upper ends of the left and right surfaces inside the box side wall, and a lower graphite plate is fixedly mounted on the lower end of the box side wall.

[0009] A further improvement of the technical solution of the present invention is that upper movable sealing strips are fixedly installed on the left and right sides of the upper surface of the upper graphite plate, lower movable sealing strips are fixedly installed on the left and right sides of the lower surface of the upper graphite plate, an upper front sealing plate is fixedly installed on the front surface of the upper graphite plate, and an adjustment device is fixedly installed on the left and right sides of the front end of the upper graphite plate.

[0010] A further improvement of the technical solution of the present invention is that the adjustment device includes a fixed frame, the fixed frame is movably connected to the front end of the box side wall, the right side of the fixed frame is movably connected to a moving wheel, the surface of the moving wheel is movably connected to a transmission chain, and the upper end of the transmission chain is movably connected to a driving wheel.

[0011] A further improvement of the technical solution of the present invention is that upper fixed sealing strips are fixedly installed on the left and right sides of the upper surface of the lower graphite plate, lower fixed sealing strips are fixedly installed on the left and right sides of the lower surface of the lower graphite plate, and a lower front sealing plate is fixedly installed on the front end of the lower graphite plate.

[0012] A further improvement of the technical solution of the present invention is that the fixed power-on device includes an upper keel frame and a lower keel frame, the upper keel frame is fixedly installed on the upper surface of the upper graphite plate, the lower keel frame is fixedly installed on the lower surface of the lower graphite plate, a screw-on terminal is fixedly installed at the center position of the upper surface of the upper keel frame, and a fixed terminal is fixedly installed at the center position of the lower surface of the lower keel frame.

[0013] A further improvement of the technical solution of the present invention is that the protective gas device includes an upper gas port and a lower gas port, the upper gas port is opened at the upper ends of the left and right sides of the box body, and the lower gas port is opened at the lower ends of the left and right sides of the box body, a sealing sleeve is fixedly installed on the outer surface of the lower gas port, and a sealing bolt is movably sleeved inside the sealing sleeve.

[0014] A further improvement of the technical solution of the present invention is that the sealing cover comprises a U-shaped sealing cover, a movable sealing cover is movably sleeved inside the U-shaped sealing cover, a handle is fixedly installed at the front end of the movable sealing cover, and a fixing bolt is movably connected to the front end of the U-shaped sealing cover.

[0015] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art:

[0016] 1. The present invention provides a graphite plate type heater, which changes the graphite tube into a graphite plate. Compared with the graphite tube, the graphite plate is easier to process, has a low processing cost, and a simple processing process. The upper graphite plate can adjust the internal size of the entire heater through an adjustment device. During adjustment, the driving wheel rotates to drive the transmission chain to rotate, and the transmission chain drives the moving wheel to rotate and move up and down, thereby driving the entire upper graphite plate to move up and down through the fixed frame, adjusting the size of the internal space, and solving the problem of insufficient internal space of the graphite tube heater.

[0017] 2. The present invention provides a graphite plate type heater. The present invention adds an upper keel frame and a lower keel frame. The upper keel frame is fixed to the upper surface of the upper graphite plate, which can play an auxiliary supporting role for the entire upper graphite plate and increase the strength of the upper graphite plate. The lower keel frame plays the same role for the lower graphite plate. The strength of the upper graphite plate and the lower graphite plate is increased by the upper keel frame and the lower keel frame to prevent the upper graphite plate and the lower graphite plate from breaking due to excessive internal pressure, resulting in heating termination and gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the bottom structure of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the regulating device of the present invention;

[0022] Figure 5 It is a schematic diagram of the sealing plug and the sealing sleeve structure of the present invention;

[0023] Figure 6 It is a schematic diagram of the sealing cover structure of the present invention.

[0024] In the figure: 1, box body; 11, box side wall; 12, upper graphite plate; 13, lower graphite plate; 121, upper movable sealing strip; 122, lower movable sealing strip; 123, upper front sealing plate; 124, adjusting device; 131, upper fixed sealing strip; 132, lower fixed sealing strip; 133, lower front sealing plate;

[0025] 1241, fixed frame; 1242, moving wheel; 1243, transmission chain; 1244, driving wheel;

[0026] 2. Fixed power supply device; 21. Upper keel frame; 22. Rotary terminal; 23. Lower keel frame; 24. Fixed terminal;

[0027] 3. Protective gas device; 31. Upper gas port; 32. Lower gas port; 33. Sealing sleeve; 34. Sealing plug;

[0028] 4. Sealing cover; 41. U-shaped sealing cover; 42. Movable sealing cover; 43. Handle; 44. Fixing bolt. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with embodiments:

[0030] Example 1

[0031] like Figure 1-6 As shown, the present invention provides a graphite plate heater, including a box body 1, a fixed power supply device 2 is fixedly installed on the upper and lower surfaces of the box body 1, a protective gas device 3 is arranged on the left and right sides of the box body 1, and a sealing cover 4 is fixedly installed on the front surface of the box body 1.

[0032] In this embodiment, the fixed power supply device 2 is used for fixed support and power supply of the graphite plate, the protective gas device 3 is responsible for cooling and protecting the graphite plate after heating, and the sealing cover 4 is used for sealing the front end during heating.

[0033] like Figure 1-6 As shown, in the present embodiment, preferably, the protective gas device 3 includes a gas upper port 31 and a gas lower port 32, the gas upper port 31 is opened at the upper ends of the left and right sides of the box body 1, and the gas lower port 32 is opened at the lower ends of the left and right sides of the box body 1, and a sealing sleeve 33 is fixedly installed on the outer surface of the gas lower port 32, and a sealing bolt 34 is movably sleeved inside the sealing sleeve 33, and the sealing cover 4 includes a U-shaped sealing cover 41, and a movable sealing cover 42 is movably sleeved inside the U-shaped sealing cover 41, and a handle 43 is fixedly installed at the front end of the movable sealing cover 42, and a fixing bolt 44 is movably connected to the front end of the U-shaped sealing cover 41, and the protective gas enters from the gas upper port 31 and the gas lower port 32 to cool the upper and lower surfaces of the graphite plate and prevent the graphite plate from oxidation reaction at high temperature, and the movable sealing cover 42 can adjust the size of the entire sealing cover 4 according to the position of the upper graphite plate 12, and fix the U-shaped sealing cover 41 and the movable sealing cover 42 by the fixing bolt 44.

[0034] Example 2

[0035] like Figure 1-6As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the box body 1 includes a box side wall 11, an upper graphite plate 12 is movably installed on the upper ends of the left and right surfaces inside the box side wall 11, a lower graphite plate 13 is fixedly installed on the lower end of the box side wall 11, an upper movable sealing strip 121 is fixedly installed on the left and right sides of the upper surface of the upper graphite plate 12, a lower movable sealing strip 122 is fixedly installed on the left and right sides of the lower surface of the upper graphite plate 12, an upper front sealing plate 123 is fixedly installed on the front surface of the upper graphite plate 12, and an adjusting device 124 is fixedly installed on the left and right sides of the front end of the upper graphite plate 12, and the adjusting device 124 includes a fixing frame 1241, the fixing frame 1241 is movably clamped at the front end of the box side wall 11, and a moving wheel 1242 is movably connected to the right side of the fixing frame 1241, a transmission chain 1243 is movably connected to the surface of the moving wheel 1242, and a driving wheel 124 is movably connected to the upper end of the transmission chain 1243 4. Upper fixed sealing strips 131 are fixedly installed on the left and right sides of the upper surface of the lower graphite plate 13, lower fixed sealing strips 132 are fixedly installed on the left and right sides of the lower surface of the lower graphite plate 13, and a lower front sealing plate 133 is fixedly installed on the front end of the lower graphite plate 13. The upper graphite plate 12 can adjust the internal size of the entire heater through the adjustment device 124. During adjustment, the driving wheel 1244 rotates to drive the transmission chain 1243 to rotate, and the transmission chain 1243 drives the moving wheel 1242 to rotate and move up and down, thereby driving the entire upper graphite plate 12 to move up and down through the fixed frame 1241 to adjust the size of the internal space. The upper moving sealing strip 121, the lower moving sealing strip 122, the upper fixed sealing strip 131, the lower fixed sealing strip 132, the upper front sealing plate 123 and the lower front sealing plate 133 all play a sealing role on the entire box body 1, and the driving wheel 1244 is used to fix the position of the transmission chain 1243.

[0036] Example 3

[0037] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the fixed power-on device 2 includes an upper keel frame 21 and a lower keel frame 23, the upper keel frame 21 is fixedly installed on the upper surface of the upper graphite plate 12, and the lower keel frame 23 is fixedly installed on the lower surface of the lower graphite plate 13, a screw-on terminal 22 is fixedly installed at the center position of the upper surface of the upper keel frame 21, and a fixed terminal 24 is fixedly installed at the center position of the lower surface of the lower keel frame 23, the upper keel frame 21 is fixed to the upper surface of the upper graphite plate 12, which can play an auxiliary supporting role for the entire upper graphite plate 12 and increase the strength of the upper graphite plate 12, and the lower keel frame 23 plays the same role for the lower graphite plate 13, the strength of the upper graphite plate 12 and the lower graphite plate 13 are increased by the upper keel frame 21 and the lower keel frame 23, and at the same time, the graphite plate is connected to the two electrodes through the screw-on terminal 22 and the fixed terminal 24 for power-on heating.

[0038] The following is a detailed description of the working principle of the graphite plate heater.

[0039] like Figure 1-6 As shown, the driving wheel 1244 rotates to drive the transmission chain 1243 to rotate, and the transmission chain 1243 drives the moving wheel 1242 to rotate and move up and down, thereby driving the entire upper graphite plate 12 to move up and down through the fixed frame 1241 to adjust the size of the internal space, and then the sample is quantitatively injected into the heater using an injector, and the size of the entire sealing cover 4 is adjusted according to the position of the upper graphite plate 12, and the U-shaped sealing cover 41 and the movable sealing cover 42 are fixed by the fixing bolt 44, and then the graphite plate is connected to the two electrodes through the screw-on terminal 22 and the fixed terminal 24, and electrically heated. After the heating is completed, the protective gas enters from the gas upper port 31 and the gas lower port 32 to cool the upper and lower surfaces of the graphite plate, while preventing the graphite plate from oxidation reaction at high temperature.

[0040] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A graphite plate heater, comprising a housing (1), characterized in that: The upper and lower surfaces of the box body (1) are fixedly mounted with a fixed power supply device (2), the left and right sides of the box body (1) are provided with a protective gas device (3), and the front surface of the box body (1) is fixedly mounted with a sealing cover (4); The box body (1) comprises a box side wall (11), an upper graphite plate (12) is movably mounted on the upper ends of the left and right surfaces inside the box side wall (11), and a lower graphite plate (13) is fixedly mounted on the lower ends of the box side wall (11); An upper movable sealing strip (121) is fixedly mounted on the left and right sides of the upper surface of the upper graphite plate (12), a lower movable sealing strip (122) is fixedly mounted on the left and right sides of the lower surface of the upper graphite plate (12), an upper front sealing plate (123) is fixedly mounted on the front surface of the upper graphite plate (12), and an adjusting device (124) is fixedly mounted on the left and right sides of the front end of the upper graphite plate (12); The adjusting device (124) comprises a fixing frame (1241), the fixing frame (1241) is movably connected to the front end of the box side wall (11), the right side of the fixing frame (1241) is movably connected to a moving wheel (1242), the surface of the moving wheel (1242) is movably connected to a transmission chain (1243), and the upper end of the transmission chain (1243) is movably connected to a driving wheel (1244); Upper fixed sealing strips (131) are fixedly mounted on the left and right sides of the upper surface of the lower graphite plate (13), lower fixed sealing strips (132) are fixedly mounted on the left and right sides of the lower surface of the lower graphite plate (13), and a lower front sealing plate (133) is fixedly mounted on the front end of the lower graphite plate (13).

2. A graphite plate heater according to claim 1, characterized in that: The fixed power supply device (2) comprises an upper keel frame (21) and a lower keel frame (23), wherein the upper keel frame (21) is fixedly mounted on the upper surface of the upper graphite plate (12), and the lower keel frame (23) is fixedly mounted on the lower surface of the lower graphite plate (13), a screw-on terminal (22) is fixedly mounted at the center of the upper surface of the upper keel frame (21), and a fixed terminal (24) is fixedly mounted at the center of the lower surface of the lower keel frame (23).

3. A graphite plate heater according to claim 1, characterized in that: The protective gas device (3) comprises an upper gas port (31) and a lower gas port (32), wherein the upper gas port (31) is provided at the upper ends of the left and right sides of the box body (1), and the lower gas port (32) is provided at the lower ends of the left and right sides of the box body (1). A sealing sleeve (33) is fixedly mounted on the outer surface of the lower gas port (32), and a sealing bolt (34) is movably sleeved inside the sealing sleeve (33).

4. A graphite plate heater according to claim 1, characterized in that: The sealing cover (4) comprises a U-shaped sealing cover (41), a movable sealing cover (42) is movably sleeved inside the U-shaped sealing cover (41), a handle (43) is fixedly mounted on the front end of the movable sealing cover (42), and a fixing bolt (44) is movably connected to the front end of the U-shaped sealing cover (41).

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