CN213957159U

CN213957159U - Transverse heating graphite tube

Info

Publication number: CN213957159U
Application number: CN202023098210.9U
Authority: CN
Inventors: 宋雅东; 温天龙
Original assignee: Beijing Purkinje General Instrument Co Ltd
Current assignee: Beijing Purkinje General Instrument Co Ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-08-13
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a transverse heating graphite pipe, including the graphite pipe main part, the pyrolysis graphite platform, the graphite retaining ring, the electric current transition piece, supporting seat and electrode contact piece, the pyrolysis graphite platform is inlayed at graphite pipe main part inner chamber downside, the graphite retaining ring sets up and compresses tightly on the pyrolysis graphite platform at graphite pipe main part inner chamber both ends, two electric current transition pieces are fixed in graphite pipe main part both sides, two supporting seats are connected with two electric current transition pieces respectively, two electrode contact pieces fixed connection respectively are on two supporting seats, the supporting seat is hollow structure, electrode contact piece is hollow structure, the side of electrode contact piece is the electrode contact face, the area of electrode contact face is 96 square millimeters-175 square millimeters. The utility model discloses a transverse heating graphite pipe has increaseed the area of contact with the front and back electrode, improves 2 times to 4 times than prior art, has reduced contact resistance, has improved the rate of rising temperature.

Description

Transverse heating graphite tube

Technical Field

The utility model relates to an analytical instrument field atomic absorption spectrophotometer graphite furnace method sample atomization's a intensification annex. In particular to a transverse heating graphite tube.

Background

As shown in fig. 1-2, the tapered surface of the transverse heating graphite tube in the prior art is an electrode contact surface 1, the area of the electrode contact surface is 38.5 square millimeters, and the disadvantage is that the contact area between the electrode contact surface 1 of the transverse heating graphite tube and the front and rear electrodes is small, which results in large contact resistance, low temperature rise rate, and influence on the sensitivity of high-temperature element analysis and test.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem of main solution is that the electrode contact surface of transverse heating graphite pipe is less, leads to the intensification speed to be low, and aim at provides a new transverse heating graphite pipe, has bigger electrode area of contact.

The utility model provides a technical scheme does: the utility model provides a transverse heating graphite pipe, including the graphite pipe main part, the pyrolysis graphite platform, the graphite retaining ring, the electric current transition piece, supporting seat and electrode contact piece, the pyrolysis graphite platform is inlayed at graphite pipe main part inner chamber downside, the graphite retaining ring sets up and compresses tightly on the pyrolysis graphite platform at graphite pipe main part inner chamber both ends, two electric current transition pieces are fixed in graphite pipe main part both sides, two supporting seats are connected with two electric current transition pieces respectively, two electrode contact pieces are fixed connection respectively on two supporting seats, the supporting seat is hollow structure, the electrode contact piece is hollow structure, the side of electrode contact piece is the electrode contact face, the area of electrode contact face is 96 square millimeters-175 square millimeters. When the transverse heating graphite tube works, current flows into the supporting seat through the electrode contact surface, flows through the current transition block, passes through the graphite tube main body, then flows into the other current transition block, flows into the other supporting seat, and finally flows out of the other electrode contact surface. In the process, the graphite tube body capable of converting electric energy into heat energy can generate 2700 ℃ high temperature, so that a sample in the graphite tube body is atomized.

The supporting seat is a hollow cylinder, and the electrode contact block is a hollow round table.

The outer diameter of the large bottom surface of the electrode contact block is greater than or equal to 10mm and less than or equal to 13 mm.

The included angle between the supporting seat and the electrode contact surface is more than or equal to 10 degrees and less than or equal to 30 degrees, and the height of the electrode contact block is more than or equal to 3 mm.

The supporting seat and the electrode contact block are of an integrated structure, and the electrode contact block is of a chamfer structure of the end face of the supporting seat.

The connecting part of the current transition block and the graphite tube main body is arc-shaped.

The current transition block is a long block.

The length of the current transition block is the same as that of the sample atomization chamber.

And the current transition block is provided with a resistance adjusting block.

The resistance adjusting block is a graphite block.

The two resistance adjusting blocks are respectively arranged at the upper side and the lower side of the current transition block.

The utility model discloses a transverse heating graphite pipe has increaseed the area of contact with the front and back electrode, and electrode contact surface area improves 2 times to 4 times than prior art between 96 square millimeters to 175 square millimeters, has reduced contact resistance, has improved the rate of rising temperature.

Drawings

FIG. 1 is a front view of a prior art graphite furnace for transverse heating of graphite tubes.

FIG. 2 is a schematic diagram of a three-dimensional structure of a transverse heating graphite tube of a graphite furnace in the prior art.

Fig. 3 is a top view of the horizontal heating graphite tube of the present invention.

Fig. 4 is a schematic diagram of the three-dimensional structure of the transverse heating graphite tube of the present invention.

Wherein, 4-graphite tube main body, 5-graphite retainer ring, 6-pyrolytic graphite platform, 41-electrode contact surface, 42-support seat, 43-graphite block, 44-current transition block, 45-sample atomization chamber, 48-photometry hole

Detailed Description

The structure and features of the present invention will be described in detail below with reference to the accompanying drawings and examples.

The utility model discloses a transverse heating graphite pipe is as shown in figure 3, as shown in figure 4, and transverse heating graphite pipe includes graphite pipe main part 4, graphite retaining ring 5, pyrolytic graphite platform 6, electrode contact piece 41, supporting seat 42, graphite piece 43, electric current transition piece 44. The transverse heating graphite tubes are symmetrical up, down, left and right. Wherein, the support seat 42, the graphite block 43, the current transition block 44, the sample atomization chamber 45 formed by the inner cavity of the graphite tube main body 4, the outline of the sampling hole and the photometric hole 48 are formed by processing a cutter of a machine tool on a graphite blank, the pyrolytic graphite platform 6 is inlaid at the lower side of the inner cavity of the graphite tube main body 4, and the graphite retainer rings 5 are arranged at two ends of the inner cavity of the graphite tube main body 4 and are pressed on the pyrolytic graphite platform 6.

The two current transition blocks 44 are fixed on two sides of the graphite tube main body 4, the two support seats 42 are respectively connected with the two current transition blocks 44, the two electrode contact blocks 41 are respectively and fixedly connected to the two support seats 42, the support seats 42 are of a hollow structure, the electrode contact blocks 41 are of a hollow structure, the side surfaces of the electrode contact blocks 41 are electrode contact surfaces, and the area of the electrode contact surfaces is 96 square millimeters to 175 square millimeters. The supporting seat 42 is a hollow cylinder, the electrode contact block 41 is a hollow circular truncated cone, and the supporting seat 42 and the electrode contact block 41 can be of a separate structure and are bonded together by adhesion. In a preferred embodiment, the supporting base 42 and the electrode contact block 41 are integrally formed, and the electrode contact block 41 is a chamfered structure of the end face of the supporting base 42. The outer diameter of the large bottom surface of the electrode contact block 41 is 10mm or more and 13mm or less. The angle 46 between the support base 42 and the electrode contact surface is greater than or equal to 10 degrees and less than or equal to 30 degrees, and the height 47 (i.e., the horizontal distance of the chamfer) of the electrode contact block 41 is greater than or equal to 3 mm.

The outer diameter of the large bottom surface of the electrode contact block 41 (i.e., the outer diameter of the support base 42 when the support base 42 and the electrode contact block 41 are of a unitary construction) the height 47 of the electrode contact block 41 and the included angle 46 of the support base 42 and the electrode contact surface 41 are important factors in increasing the electrode contact surface. The area of the electrode contact surface 41 formed varies depending on the range of the influence factor, and it is found that the area of the electrode contact surface 41 is preferably 96 mm to 175 mm by testing. The area of the electrode contact surface 41 is 2 times to 4 times of that of the prior art, so that the contact resistance can be effectively reduced, and the heating rate is improved.

When the support base 42 and the electrode contact block 41 are integrated, the end of the support base 42 can be chamfered to form the electrode contact block 41 after the coating of the pyrolysis coating furnace is completed.

As shown in fig. 3, the connecting portion between the current transition block 44 and the graphite tube main body 4 is circular arc-shaped. Since the circular arc can make a smooth transition, the current is uniformly distributed as it flows through the sample atomization chamber 45. The current transition block 44 may be in the shape of a long bar, which is the same as the length of the sample atomization chamber 45.

As shown in fig. 3-4, two resistance-adjusting graphite blocks 43 are respectively provided at the upper and lower sides of the current transition block 44 at both sides of the graphite tube main body 4, and the shape thereof may be square, spherical, circular or other shapes.

Finally, it should be noted that: the above-mentioned embodiments are only used for illustrating the technical solution of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a transverse heating graphite pipe, including the graphite pipe main part, the pyrolysis graphite platform, the graphite retaining ring, the electric current transition piece, supporting seat and electrode contact piece, the pyrolysis graphite platform is inlayed at graphite pipe main part inner chamber downside, the graphite retaining ring sets up and compresses tightly on the pyrolysis graphite platform at graphite pipe main part inner chamber both ends, two electric current transition pieces are fixed in graphite pipe main part both sides, two supporting seats are connected with two electric current transition pieces respectively, two electrode contact pieces are fixed connection respectively on two supporting seats, the supporting seat is hollow structure, the electrode contact piece is hollow structure, the side of electrode contact piece is the electrode contact face, the area of electrode contact face is 96 square millimeters-175 square millimeters.

2. The transverse heating graphite tube of claim 1, wherein the support base is a hollow cylinder and the electrode contact block is a hollow truncated cone.

3. The transverse heating graphite tube of claim 2, wherein the outer diameter of the large bottom surface of the electrode contact block is greater than or equal to 10mm and less than or equal to 13 mm.

4. The transverse heating graphite tube of claim 3, wherein the angle between the support base and the electrode contact surface is greater than or equal to 10 ° and less than or equal to 30 °, and the height of the electrode contact block is greater than or equal to 3 mm.

5. A transverse heating graphite tube according to any one of claims 1 to 4, in which the support block and the electrode contact block are of unitary construction, the electrode contact block being of chamfered construction at the end face of the support block.

6. The transverse heating graphite tube of claim 1, wherein the connection between the current transition block and the graphite tube body is circular arc.

7. The transverse heating graphite tube of claim 1, wherein the current transition block is provided with a resistance adjustment block.

8. The transverse heating graphite tube of claim 7, wherein the resistance adjusting block is a graphite block.

9. The transverse heating graphite tube of claim 7, wherein the two resistance adjusting blocks are respectively arranged at the upper side and the lower side of the current transition block.

10. The transverse heating graphite tube of claim 7, wherein the current transition block is a long block.