CN213933574U

CN213933574U - Atomic absorption spectrophotometer

Info

Publication number: CN213933574U
Application number: CN202022931147.6U
Authority: CN
Inventors: 高循洲; 周文喜
Original assignee: Zhejiang Bilif Testing Technology Co ltd
Current assignee: Zhejiang Bilif Testing Technology Co ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2021-08-10
Anticipated expiration: 2030-12-07

Abstract

The utility model relates to an atomic absorption spectrophotometer, including the spectrophotometer body, the spectrophotometer body is equipped with the sample atomizer, auto-change over device includes driving motor, the switching piece, switching piece fixedly connected with combustion head, the sample atomizer is equipped with the installation position, the combustion head is equipped with the ignition slit, the spectrophotometer body is equipped with cleaning device, the switching piece includes the bottom segment, the top platform, the bottom segment sets firmly elastic component, the bottom of combustion head is equipped with the direction chamfer, the bottom segment is equipped with the guide bar, the top platform is equipped with the spout, the guide bar cover is equipped with the spring. By arranging the switching piece and the driving motor, the combustion head of the spectrophotometer can be automatically replaced, so that the spectrophotometer is convenient; by arranging the cleaning device, the combustion head can be cleaned, the cleanness of the combustion head is kept, and the detection accuracy is kept; through setting up the elastic component, make the combustion head can sticis the installation position, improve the leakproofness between the two.

Description

Atomic absorption spectrophotometer

Technical Field

The application relates to the technical field of detection, in particular to an atomic absorption spectrophotometer.

Background

Atomic absorption spectrophotometry is a device for analyzing metal elements based on the effect of atomic vapor in the ground state of a substance on the absorption of characteristic radiation.

There are two main types of atomizers, namely flame atomizers and electrothermal atomizers. The flame has various flames, the air-acetylene flame is commonly used at present, the graphite furnace atomizer is commonly used in the electric heating atomizer, so that the flame atomic absorption spectrophotometer and the graphite furnace-containing atomic absorption spectrophotometer have the atomization temperature of 2100-2400 ℃ and the atomization temperature of 2900-3000 ℃.

With regard to the flame atomizer, because can accumulate sample impurity on the transform of sample and the combustion head end wall of its sample atomizer after the live time overlength, when personnel continued to use this instrument to detect, these impurity can cause the interference to the testing result because the drive of high temperature and air current has partly entering flame in, need personnel to take apart the atomic absorption spectrophotometer, manual clearing up the combustion head and change.

In view of the above-mentioned related art, the inventor believes that the manual replacement or cleaning is inconvenient.

SUMMERY OF THE UTILITY MODEL

In order to facilitate replacement of the burner head, the present application provides an atomic absorption spectrophotometer.

The atomic absorption spectrophotometer provided by the application adopts the following technical scheme:

the atomic absorption spectrophotometer comprises a spectrophotometer body, wherein the spectrophotometer body is provided with a sample atomizer, the spectrophotometer body is provided with a switching device, the switching device comprises a driving motor and a switching piece which is rotatably connected with the spectrophotometer body, the switching piece is driven by the driving motor to rotate, a plurality of combustion heads are fixedly connected to the circumferential side wall of the switching piece and are distributed at intervals along the circumferential direction of the switching piece, the sample atomizer is provided with mounting positions for mounting the combustion heads, and the switching piece can rotate to switch the combustion heads in the mounting positions.

Through adopting above-mentioned technical scheme, after this spectrophotometer uses for a long time, after accumulating impurity on the slit inner wall of burning head, personnel's accessible driving motor rotates the switching piece, makes the switching piece of taking impurity keep away from the installation position, accomplishes the installation in the clean burning head gets into the installation position on the switching piece simultaneously, realizes the automatic change of burning head, need not personnel's manual change, and is comparatively convenient.

Preferably, the driving motor is a stepping motor.

Through adopting above-mentioned technical scheme, step motor's turned angle is adjustable, and the accurate switching piece that rotates of personnel of being convenient for realizes the accurate change to the combustion head.

Preferably, the combustion head is provided with an ignition slit, the depth direction of the ignition slit is along the vertical direction, and the spectrophotometer body is provided with a cleaning device for cleaning the inner wall of the ignition slit.

Through adopting above-mentioned technical scheme, cleaning device can clear up the combustion head, keeps it clean to improve the accuracy of testing result.

Preferably, the cleaning device comprises a cleaning cylinder and a cleaning piece fixed on a piston rod of the cleaning cylinder, the piston rod of the cleaning cylinder is axially arranged along the depth direction of the ignition slit, and the circumferential side wall of the cleaning piece is used for being attached to the circumferential inner wall of the ignition slit.

Through adopting above-mentioned technical scheme, personnel's accessible clearance cylinder drive clearance piece downstream stretches into in the ignition slit, and the lateral wall of clearance piece scrapes the circumference inner wall of ignition slit to impurity on the ignition slit inner wall carries out automatic clearance, prevents that impurity on the slit inner wall from being taken out along with the air current together, causes the interference to the testing result, and the setting up of clearance cylinder makes personnel need not manually to burn with clearing up, and is comparatively convenient.

Preferably, the bottom end of the cleaning piece is arranged in a tapered manner.

Through adopting above-mentioned technical scheme, because the circumference lateral wall of clearance spare pastes with the ignition slit inner wall, and its bottom is the convergent form, must be less than the size of slit opening in its bottom, make during clearance spare can get into the ignition slit smoothly, difficult the phenomenon that does not appear jamming.

Preferably, the switching piece comprises a bottom section and a top platform, the combustion head is positioned on the top platform, the bottom section is fixedly connected with a motor shaft of the driving motor, the bottom section is fixedly provided with an elastic piece, the bottom section is connected with the top platform through the elastic piece, and the bottom end of the combustion head is provided with a guide chamfer.

Through adopting above-mentioned technical scheme, personnel's accessible driving motor makes the switching piece rotate, makes the direction chamfer of burning head bottom to leaning on with the avris of installation position, later continues to rotate the switching piece, receives the effect of the component force that makes progress on direction chamfer inclined plane, and the top platform can upwards stretch out and draw back, makes the one section distance of burning head upward movement, gets into the installation position and accomplishes the installation, and the setting of elastic component, direction chamfer makes the burning head can reach the installation department smoothly through the rotation of switching piece.

Preferably, the bottom section is provided with a guide rod, the length direction of the guide rod is along the vertical direction, the top platform is provided with a sliding groove for the guide rod to extend into, the shape of the sliding groove is matched with that of the guide rod, the elastic part adopts a spring and is sleeved on the guide rod, and two ends of the elastic part are respectively fixedly connected with the bottom section and the top platform.

Through adopting above-mentioned technical scheme, the setting up of guide bar makes the direction of motion of top platform can follow vertical direction, makes the bottom of burning head hug closely with the installation phase.

Preferably, the guide bar has a polygonal cross-sectional shape.

Through adopting above-mentioned technical scheme, the shape of guide bar makes the top platform rotate along with the bottom segment is synchronous, prevents top platform and bottom segment relative rotation, makes combustion head skew installation position.

In summary, the present application includes at least one of the following beneficial technical effects:

by arranging the switching piece and the driving motor, the combustion head of the spectrophotometer can be automatically replaced, so that the spectrophotometer is convenient;

the cleaning device can clean the combustion head and keep the combustion head clean;

through setting up the elastic component, make the combustion head can sticis the installation position, improve the leakproofness between the two.

Drawings

Fig. 1 is a perspective view of an embodiment of the present application.

Fig. 2 is a partial structural view of an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a sample atomizer and a switching device according to an embodiment of the present application.

Description of reference numerals: 1. a spectrophotometer body; 2. a sample atomizer; 21. an installation position; 3. a switching device; 31. a drive motor; 32. a switching member; 321. a top stage; 322. a bottom section; 323. an elastic member; 324. a guide bar; 325. a chute; 33. a burner head; 331. an ignition slot; 332. guiding and chamfering; 4. a cleaning device; 41. cleaning the air cylinder; 42. and (6) cleaning the parts.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

An atomic absorption spectrophotometer, refer to fig. 1 and 2, comprises a spectrophotometer body 1, wherein the spectrophotometer body 1 is provided with a sample atomizer 2, a hollow cathode lamp, an optical system and a detection system, and the upper end of the sample atomizer 2 is provided with a combustion head 33.

Referring to fig. 2 and 3, the combustion head 33 is slidably connected to the sample atomizer 2, the spectrophotometer body 1 is provided with a switching device 3, the switching device 3 includes a driving motor 31, a switching member 32 rotatably connected to the spectrophotometer body 1, the switching member 32 is close to the sample atomizer 2, the driving motor 31 is fixedly connected to the spectrophotometer, the switching member 32 is fixedly connected to an output shaft of the driving motor 31 and is driven by the driving motor 31 to rotate, the driving motor 31 is a stepping motor, the combustion head 33 is fixed to the switching member 32, the combustion head 33 is circumferentially spaced apart from the switching member 32, the sample atomizer 2 is provided with a mounting position 21 for the combustion head 33 to mount, the mounting position 21 is a horizontal ring surface, and the switching member 32 can rotate to enable the combustion head 33 to enter the mounting position 21.

After a burning head 33 uses a period, personnel's accessible driving motor 31 drive switching piece 32 rotates, makes the burning head 33 that is located on the installation position 21 keep away from installation position 21, and burning head 33 adjacent with this burning head 33 rotates and gets into installation position 21, replaces this burning head 33 to carry out work, need not personnel's manual change, and is comparatively convenient.

The switching member 32 includes a bottom section 322 and a top platform 321 slidably connected to the bottom section 322, the combustion head 33 is located on the top platform 321, the bottom section 322 is fixedly connected to a motor shaft of the driving motor 31, a guide rod 324 is disposed on a top surface of the bottom section 322, and a cross section of the guide rod 324 is square. The bottom surface of the top platform 321 is provided with a sliding groove 325 into which the guide rod 324 extends, the length direction of the guide rod 324 is along the vertical direction, the shape of the sliding groove 325 is matched with the shape of the guide rod 324, the elastic part 323 adopts a spring, the elastic part 323 is sleeved on the guide rod 324, the elastic part 323 has an inward-contracting elastic force, the elastic direction of the elastic part 323 is along the vertical direction, two ends of the elastic part 323 are respectively fixedly connected with the bottom section 322 and the top platform 321, and the bottom end of the combustion head 33 is provided with a guide chamfer 332.

The height of the bottom end of the combustion head 33 is slightly smaller than the height of the installation position 21, the distance between the bottom end of the combustion head 33 and the installation position 21 is smaller than the height of the guide chamfer 332, a person can rotate the switching piece 32 through the driving motor 31 to enable the guide chamfer 332 at the bottom end of the combustion head 33 to be abutted against the side of the installation position 21 in the lateral direction, then the switching piece 32 continues to rotate, under the action of upward component force of the inclined surface of the guide chamfer 332, the top platform 321 can extend upwards, the combustion head 33 can move upwards for a certain distance to enter the installation position 21, and due to the fact that the spring is tensioned at the moment, the spring has contraction elasticity, the elasticity of the spring is transmitted to the combustion head 33 through the top platform 321, the combustion head 33 is enabled to tightly press the surface of the installation position 21, and the sealing performance between the combustion head 33 and the installation position 21 is enhanced.

The top surface of the combustion head 33 is provided with an ignition slit 331, the depth direction of the ignition slit 331 is along the vertical direction, the spectrophotometer body 1 is provided with a cleaning device 4 for cleaning the inner wall of the ignition slit 331, the cleaning device 4 is positioned above the combustion head 33 and is far away from the pattern atomizer, the cleaning device 4 comprises a cleaning cylinder 41 and a cleaning piece 42, the cleaning piece 42 is fixedly connected with a piston rod of the cleaning cylinder 41, the cleaning cylinder 41 is fixedly connected with the spectrophotometer, the end part of the piston rod is vertically arranged downwards, the shape of the cleaning piece 42 is matched with the shape of the ignition slit 331, the cleaning piece 42 is in a thin plate shape, the cleaning piece 42 has elasticity, the circumferential side wall of the cleaning piece 42 is provided with cleaning cloth, the cleaning cloth of the circumferential side wall of the cleaning piece 42 is used for being attached to the circumferential inner wall of the ignition slit 331, when the piston rod of the cleaning cylinder 41 repeatedly extends and retracts, the cleaning piece 42 moves up and down, and cleaning the circumferential inner wall of the slit. The bottom end of the cleaning member 42 is tapered so that the cleaning member 42 can smoothly enter the ignition slit 331.

The implementation principle of the atomic absorption spectrophotometer in the embodiment of the application is as follows: when the spectrophotometer is used for a period of time and impurities are accumulated on the surface of the combustion head 33, personnel can drive the switching piece 32 to rotate through the driving motor 31, so that the combustion head 33 with the impurities is installed at the installation position 21 and is rotated to the position below the cleaning piece 42, the cleaning piece 42 can clean the combustion head 33, and meanwhile, the clean combustion head 33 moves to the installation position 21 through the rotation of the switching piece 32, so that the spectrophotometer can work normally.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an atomic absorption spectrophotometer, includes spectrophotometer body (1), spectrophotometer body (1) is equipped with sample atomizer (2), its characterized in that: the spectrophotometer body (1) is equipped with auto-change over device (3), auto-change over device (3) include driving motor (31), rotate with spectrophotometer body (1) and be connected switch (32), switch (32) are rotated by driving motor (31) drive, fixedly connected with a plurality of combustion heads (33) on the circumference lateral wall of switch (32), it is a plurality of combustion heads (33) are along the circumference interval distribution of switch (32), sample atomizer (2) are equipped with installation position (21) that supply combustion head (33) to install, switch (32) can rotate and switch combustion head (33) in the installation position (21).

2. An atomic absorption spectrophotometer as claimed in claim 1, wherein: the driving motor (31) is a stepping motor.

3. An atomic absorption spectrophotometer as claimed in claim 1, wherein: the combustion head (33) is provided with an ignition slit (331), the depth direction of the ignition slit (331) is along the vertical direction, and the spectrophotometer body (1) is provided with a cleaning device (4) for cleaning the inner wall of the ignition slit (331).

4. An atomic absorption spectrophotometer as claimed in claim 3, wherein: cleaning device (4) including clearance cylinder (41), fix clearance piece (42) on clearance cylinder (41) piston rod, the piston rod axial of clearance cylinder (41) sets up along the direction of depth of ignition slit (331), the circumference lateral wall of clearance piece (42) is used for pasting mutually with the circumference inner wall of ignition slit (331).

5. An atomic absorption spectrophotometer as claimed in claim 4, wherein: the bottom end of the cleaning piece (42) is arranged in a tapered shape.

6. An atomic absorption spectrophotometer as claimed in claim 3, wherein: the switching piece (32) comprises a bottom section (322) and a top platform (321), the combustion head (33) is located on the top platform (321), the bottom section (322) is fixedly connected with a motor shaft of the driving motor (31), the bottom section (322) is fixedly provided with an elastic piece (323), the bottom section (322) is connected with the top platform (321) through the elastic piece (323), and the bottom end of the combustion head (33) is provided with a guide chamfer (332).

7. An atomic absorption spectrophotometer as claimed in claim 6, wherein: the utility model discloses a spring, including bottom section (322), top platform (321), top platform (324), bottom section (322) are equipped with guide bar (324), the length direction of guide bar (324) is along vertical direction, top platform (321) are equipped with spout (325) that supply guide bar (324) to stretch into, the shape of spout (325) agrees with the shape of guide bar (324), elastic component (323) adopt the spring, elastic component (323) cup joint on guide bar (324), the both ends of elastic component (323) respectively with bottom section (322), top platform (321) fixed connection.

8. An atomic absorption spectrophotometer as claimed in claim 7, wherein: the cross-sectional shape of the guide bar (324) is polygonal.