CN215523630U

CN215523630U - Laboratory ventilation device for atomic absorption spectrometer

Info

Publication number: CN215523630U
Application number: CN202121136595.5U
Authority: CN
Inventors: 黎中令; 王舒敏; 盛勇
Original assignee: Nanjing Nuowei Testing Technology Co ltd
Current assignee: Nanjing Nuowei Testing Technology Co ltd
Priority date: 2021-05-25
Filing date: 2021-05-25
Publication date: 2022-01-14
Anticipated expiration: 2031-05-25

Abstract

The utility model discloses a laboratory ventilation device for an atomic absorption spectrometer, which solves the problems that the size of an air port of a conventional laboratory ventilation pipeline is not adjustable, the ventilation speed is constant and various laboratory ventilation requirements in a laboratory cannot be met, and the utility model adopts the main technical scheme that an adjusting mechanism is fixedly connected to the bottom of an extension pipeline, the adjusting mechanism comprises a fan cover, a rotating tooth, a first fan-shaped tooth, a second fan-shaped tooth, a rack and a baffle plate, a sliding chute is arranged at the joint of the fan cover and the extension pipeline, the bottom of the baffle plate is connected with the sliding chute in a sliding manner, the rotating tooth is connected with the fan cover in a rotating manner, one end of the rotating tooth is engaged and matched with the first fan-shaped tooth and the second fan-shaped tooth in an alternating manner, the other end of the rotating tooth is engaged and matched with the rack, the rack is connected with the fan cover in a sliding manner, the first fan-shaped tooth and the second fan-shaped tooth are respectively connected with the fan cover in a rotating manner through a synchronous belt, and the baffle plate is used for adjusting the air outlet area at the bottom of the extension pipeline, the baffle is fixedly connected with the rack through a connecting frame.

Description

Laboratory ventilation device for atomic absorption spectrometer

Technical Field

The utility model relates to the technical field of atomic absorption spectrometers, in particular to a laboratory ventilation device for an atomic absorption spectrometer.

Background

An atomic absorption spectrometer is an instrument for measuring various elements, and the main principle is that the instrument radiates light with characteristic spectral lines of the elements to be measured from a light source, the light is absorbed by ground state atoms of the elements to be measured in steam when passing through steam of a sample, and the content of the elements to be measured in the sample is measured by the weakened degree of the radiation characteristic spectral line light.

In atomic spectrometer's actual operation, its own with gas safety demand high, acetylene gas cylinder in the instrument, argon gas cylinder must use under the standard operation, detect back waste gas waste water and discharge through the unified discharge of the inside air compressor machine of instrument, the interior ventilation unit of deuterogamy laboratory discharges, and what adopt to atomic spectrometer laboratory at present is that air pipe and external world ventilate, ventilation speed is difficult to adjust, ventilation effect is limited, is unfavorable for laboratory personnel safe and healthy for a long time.

SUMMERY OF THE UTILITY MODEL

To overcome the above disadvantages, an object of the present invention is to provide a laboratory ventilation apparatus for an atomic absorption spectrometer capable of autonomously adjusting the ventilation amount of a ventilation opening.

In order to achieve the above purposes, the utility model adopts the technical scheme that: a laboratory ventilation unit for atomic absorption spectroscopy appearance, including centrifugal fan, the last bolt fastening of centrifugal fan has the extension pipeline, extension pipeline bottom fixedly connected with adjustment mechanism, adjustment mechanism includes fan housing, commentaries on classics tooth, first fan-shaped tooth, the fan-shaped tooth of second, rack and baffle, fan housing one end is fixed and is linked together with the extension pipeline bottom, and the other end is towards the atomic spectrum absorptometer, the fan housing is equipped with the spout with the extension pipeline junction, the baffle bottom slides with the spout and is connected, the commentaries on classics tooth rotates with the fan housing to be connected, commentaries on classics tooth one end meshes the cooperation with first fan-shaped tooth, the fan-shaped tooth of second alternating, and the other end meshes the cooperation with the rack, the rack slides with the fan housing to be connected, first fan-shaped tooth, the fan-shaped tooth of second rotate with the fan-shaped tooth respectively and are connected with the knob through the hold-in range rotation, the baffle is used for adjusting the air outlet area at the bottom of the extension pipeline, and the baffle is fixedly connected with the rack through a connecting frame.

Preferably, centrifugal fan includes motor, flabellum frame and connection platform, the motor rotates with the flabellum frame to be connected, it is used for centrifugal fan monolithic stationary to connect the platform.

Preferably, the cross-sectional area of the hood is larger than the cross-sectional area of the extension duct.

Preferably, the bottom of the fan housing is fixedly connected with a filter screen.

The utility model has the advantages that the air inlet of the ventilation pipeline can be adjusted through a simple mechanical mechanism, so that the overall ventilation speed in a laboratory is controlled, various experimental working conditions are fitted, the control is convenient, the adjustment is simple, the overall design is reasonable, and the utility model is practical and convenient.

Drawings

FIG. 1 is a front view of a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A of FIG. 1 in accordance with a preferred embodiment of the present invention;

fig. 3 is a schematic internal structure diagram of a preferred embodiment of the present invention.

In the figure: 1. a centrifugal fan; 11. a motor; 12. a fan blade frame; 13. a connecting table; 2. an extension duct; 3. an adjustment mechanism; 31. a fan housing; 32. rotating the teeth; 33. a first sector tooth; 34. a second sector-shaped tooth; 35. a baffle plate; 36. a chute; 37. a synchronous belt; 38. a knob; 39. a rack; 4. a connecting frame; 5. and (5) filtering by using a filter screen.

Detailed Description

The following detailed description of the preferred embodiments of the present invention, taken in conjunction with the accompanying drawings, will make the advantages and features of the utility model easier to understand by those skilled in the art, and thus will clearly and clearly define the scope of the utility model.

Referring to fig. 1 to 3, the laboratory ventilation apparatus for an atomic absorption spectrometer in the present embodiment includes a centrifugal ventilator 1:

as shown in fig. 1, an extension duct 2 is fixed to the centrifugal fan 1 by bolts, and an adjusting mechanism 3 is fixedly connected to the bottom of the extension duct 2.

As shown in fig. 2 and 3, the adjusting mechanism 3 includes a fan housing 31, a rotating tooth 32, a first sector tooth 33, and a second sector tooth 34, rack 39 and baffle 35, fan housing 31 one end is fixed and is communicated with extension pipeline 2 bottom, the other end is towards the atomic spectrum absorption instrument, fan housing 31 is equipped with spout 36 with extension pipeline 2 junction, baffle 35 bottom is slided with spout 36 and is connected, it is connected with fan housing 31 to rotate tooth 32, change tooth 32 one end and first fan-shaped tooth 33, the meshing cooperation of second fan-shaped tooth 34 alternating, the other end and the meshing cooperation of rack 39, rack 39 slides with fan housing 31 and is connected, first fan-shaped tooth 33, second fan-shaped tooth 34 rotates with fan housing 31 respectively and is connected, first fan-shaped tooth 33 rotates through hold-in range 37 with second fan-shaped tooth 34 and is connected with knob 38, baffle 35 is used for adjusting extension pipeline 2 bottom air-out area, baffle 35 passes through link 4 fixed connection with rack 39.

As shown in fig. 1, the centrifugal fan 1 includes a motor 11, a fan frame 12, and a connection platform 13, wherein the motor 11 is rotatably connected to the fan frame 12, and the connection platform 13 is used for integrally fixing the centrifugal fan 1.

As shown in fig. 2 and 3, the cross-sectional area of the wind shield 31 is larger than that of the extension duct 2, and the bottom of the wind shield 31 is fixedly connected with the filter screen 5.

When the fan is used specifically, the motor 11 drives the fan blades in the fan blade frame 12 to rotate, the fan blades generate centrifugal force, so that indoor and outdoor ventilation exchange is realized, a user can realize ventilation adjustment of an air port only by rotating the knob 38, after the knob 38 rotates, the first sector-shaped teeth 33 and the second sector-shaped teeth 34 can be driven to rotate simultaneously through the synchronous belt 37, so that the rotating teeth 32 can be meshed and matched with the first sector-shaped teeth 33 and the second sector-shaped teeth 34 alternately, and finally, intermittent linear reciprocating motion of the rack 39 meshed and matched with the top of the rotating teeth 32 is realized, the rack 39 can drive the baffle 35 to move together through the connecting frame 4 while sliding on the fan housing 31, after the baffle 35 slides in the sliding groove 36, the area of the bottom of the fan housing 31 can be controlled, the filter screen 5 can reduce accumulation of foreign dust in the fan housing 31, the user only needs to manually rotate the knob 38 without positive and negative differences, the air volume required by the user is controlled by sensing the air outlet volume, and the device is practical, convenient, low in cost and simple to install.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.

Claims

1. Laboratory ventilation device for atomic absorption spectrometers, comprising a centrifugal ventilator (1), characterized in that: the centrifugal fan (1) is fixed with an extension pipeline (2) by bolts, the bottom of the extension pipeline (2) is fixedly connected with an adjusting mechanism (3), the adjusting mechanism (3) comprises a fan cover (31), a rotating tooth (32), a first fan-shaped tooth (33), a second fan-shaped tooth (34), a rack (39) and a baffle (35), one end of the fan cover (31) is fixed and communicated with the bottom of the extension pipeline (2), the other end of the fan cover faces to an atomic spectrum absorption instrument, a sliding groove (36) is arranged at the joint of the fan cover (31) and the extension pipeline (2), the bottom of the baffle (35) is connected with the sliding groove (36) in a sliding manner, the rotating tooth (32) is connected with the fan cover (31) in a rotating manner, one end of the rotating tooth (32) is meshed with the first fan-shaped tooth (33) and the second fan-shaped tooth (34) in an alternating manner, the other end of the rotating tooth is meshed with the rack (39), and the rack (39) is connected with the fan cover (31) in a sliding manner, first fan-shaped tooth (33), fan-shaped tooth of second (34) rotate with fan housing (31) respectively and are connected, first fan-shaped tooth (33) rotate through hold-in range (37) with fan-shaped tooth of second (34) and are connected with knob (38), baffle (35) are used for adjusting extension pipeline (2) bottom air-out area, baffle (35) pass through link (4) fixed connection with rack (39).

2. The laboratory ventilation apparatus for an atomic absorption spectrometer of claim 1, wherein: centrifugal fan (1) includes motor (11), flabellum frame (12) and is connected platform (13), motor (11) rotate with flabellum frame (12) and be connected, it is used for centrifugal fan (1) monolithic stationary to connect platform (13).

3. The laboratory ventilation apparatus for an atomic absorption spectrometer of claim 1, wherein: the sectional area of the fan cover (31) is larger than that of the extension pipeline (2).

4. The laboratory ventilation apparatus for an atomic absorption spectrometer of claim 1, wherein: the bottom of the fan cover (31) is fixedly connected with a filter screen (5).