CN210004747U

CN210004747U - muffle furnace

Info

Publication number: CN210004747U
Application number: CN201920780867.1U
Authority: CN
Inventors: 王侃; 尹随随; 邱园园; 蒋建
Original assignee: Nanjing Tengsen Analytical Instrument Co Ltd
Current assignee: Nanjing Tengsen Analytical Instrument Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-01-31
Anticipated expiration: 2029-05-28

Abstract

The utility model relates to a muffle furnace technical field discloses kind of muffle furnace, it includes lower heat preservation lid, be equipped with the heating groove in it, heating groove bottom is equipped with the resistance wire, go up the heat preservation lid, its rotation is connected in lower heat preservation lid's top and is used with lower heat preservation lid cooperation, go up to keep warm to cover and be equipped with the second heating groove, second heating groove forms the heating chamber with heating groove cooperation, the crucible bracket, its rotation is installed and is covered under, the crucible bracket is located the heating intracavity and is equipped with a plurality of through-holes on it, makes heating groove and second heating groove intercommunication, the utility model discloses locate heating groove bottom with the resistance wire, when the heating is waited to heat, will be equipped with the crucible of treating to heat and place on the crucible bracket or directly will treat to heat and put on the crucible bracket, rate of heating is fast, the utility model discloses small, easily carry, and open 's design on, can be faster reduce the temperature in the muffle furnace, it is more convenient to operate, and the bracket can rotate, operates safelyr.

Description

muffle furnace

Technical Field

The utility model relates to a muffle furnace technical field especially relates to kinds of muffle furnace.

Background

The muffle furnace is heating equipment for heating workpieces, is used for to be widely applied due to accurate temperature control, simple and convenient operation and high heating speed, and is often used when the heavy metal content in a certain substance is analyzed, but the volume of a heating cavity of the muffle furnace in the market is large, the heating speed is relatively low, after the substance is heated, the heat dissipation speed is low, and when the heated substance is taken out, operators are easily scalded, and the potential safety hazard of is existed.

Taking the rapid pretreatment of the sample as an example, the temperature inside the muffle furnace needs to be raised to 600 ℃ for about forty minutes to hours, and the temperature inside the muffle furnace needs to be lowered from 600 ℃ to 50 ℃ for about four hours, so that the percentage proportion of the temperature rise time and the temperature decrease time of the rapid pretreatment of batches of samples to the total treatment time is too large, and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

Based on above, the utility model aims at providing kinds of muffle furnace has solved the current muffle furnace heating chamber the volume great, the programming time is long, cooling rate is slow and because the radiating rate is slow and the potential safety hazard problem that exists.

In order to achieve the purpose, the utility model adopts the following technical proposal:

A muffle comprising:

a th heating groove is formed in the lower heat-insulating cover, and a resistance wire is arranged at the bottom of the th heating groove;

the upper heat-insulation cover is rotatably connected above the lower heat-insulation cover and is matched with the lower heat-insulation cover for use, a second heating groove is formed in the upper heat-insulation cover, and the second heating groove is matched with the th heating groove to form a heating cavity;

the crucible bracket, its rotate install in on the lower heat preservation covers, the crucible bracket is located in the heating chamber just be equipped with a plurality of through-holes on the crucible bracket, it is a plurality of the through-hole makes the th heating bath with the second heating bath intercommunication.

As a preferable scheme of muffle furnaces, a groove is formed in the bottom of the heating groove, and the resistance wire is located in the groove.

As the preferred scheme of kinds of muffle furnace, be equipped with the louvre on the upper heat preservation lid, the louvre with the heating chamber intercommunication for with the flue gas in the heating chamber gives off to the external world.

As a preferable scheme of muffle furnaces, the heat dissipation holes are positioned at the top of the second heating groove.

As a preferred scheme of muffle furnaces, the lower heat-preserving cover comprises a lower heat-preserving cover furnace lining, the upper heat-preserving cover comprises an upper heat-preserving cover furnace lining, the th heating groove is located on the lower heat-preserving cover furnace lining, and the second heating groove is located on the upper heat-preserving cover furnace lining.

As the preferred scheme of kinds of muffle furnaces, the upper heat-insulating cover further comprises an upper heat-insulating cover body, a furnace lining of the upper heat-insulating cover and the upper heat-insulating cover body form a heat dissipation cavity, the heat dissipation cavity is communicated with the heat dissipation holes, a heat dissipation fence is arranged on the back side surface of the upper heat-insulating cover body, and the heat dissipation fence is communicated with the heat dissipation holes and the outside.

As the preferred scheme of muffle furnaces, the muffle furnace further comprises an electrical cabinet and a heat dissipation fan, wherein the electrical cabinet and the heat dissipation fan are located below the lower heat-insulating cover, a mounting cavity is formed in the lower heat-insulating cover, and the heat dissipation fan is located in the mounting cavity.

As a preferred scheme of muffle furnaces, an air inlet is arranged on the electrical cabinet, the air inlet is located on the side end face of the electrical cabinet, and the air inlet is communicated with the mounting cavity.

The preferable scheme of muffle furnaces further comprises an actuator and a rotating button, wherein the actuator is connected with the crucible bracket, the rotating button is positioned on the front side surface of the electric cabinet, the actuator is configured to move the crucible bracket upwards and rotate in the direction when the rotating button is pressed down, and the actuator is further configured to reset the crucible bracket when the rotating button is reset.

As a preferable proposal of muffle furnaces, the upper heat preservation cover is provided with a handle which is positioned on the side end surface of the upper heat preservation cover.

The beneficial effects of the utility model are that, the utility model discloses a with heating groove and the cooperation of second heating groove formation heating chamber, the size in heating chamber can set up according to actual need, and the resistance wire is directly located heating groove bottom, when treating the heating object heating, will be equipped with the crucible of treating the heating object and place on the crucible bracket or directly will treat the heating object and place on the crucible bracket, the programming rate is fast, the utility model discloses small, easily carry, it compares with is opened to the side among the prior art to open on, has overcome prior art's technical bias, and heat radiating area increases, and the temperature in the muffle furnace can be faster the reduction, and it is more convenient to operate, crosses and the crucible bracket is rotated to the outside, makes the treating after the heating object position in the oblique top of heat preservation lid down, takes off the heating on the crucible bracket this moment, and the operation is safer.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only the embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.

FIG. 1 is a schematic view of a muffle according to an embodiment of the invention;

FIG. 2 is a schematic view of a muffle furnace with an upper heat-retaining cover removed according to an embodiment of the present invention;

FIG. 3 is a schematic view of the muffle furnace with the upper heat-insulating cover and the crucible tongs bracket removed according to the embodiment of the present invention.

In the figure:

1-lower heat preservation cover, 11- th heating groove, 111-groove, 2-upper heat preservation cover, 21-second heating groove, 22-heat dissipation hole, 23-handle, 24-avoidance groove, 3-crucible bracket, 31-through hole, 4-electrical cabinet, 41-air inlet, 5-rotary button, 6-power switch, 7-display screen and 8-crucible.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved by the present invention clearer, the following will make steps of detailed description on the technical solution of the embodiments of the present invention with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention , but not all embodiments.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like refer to orientations and positional relationships based on the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" shall be construed , and for example, they may be fixedly connected or detachably connected, they may be mechanically connected or electrically connected, they may be directly connected or indirectly connected through an intermediate medium, and they may communicate between two elements.

As shown in fig. 1-3, the present embodiment provides kinds of muffle furnaces, which includes a lower thermal cover 1, an upper thermal cover 2 and a crucible bracket 3, wherein the upper thermal cover 2 is rotatably connected to the lower thermal cover 1, the upper thermal cover 2 is located above the lower thermal cover 1 and is used in cooperation with the lower thermal cover 1, a heating slot 11 is provided in the lower thermal cover 1, a resistance wire is provided at the bottom of the heating slot 11, a second heating slot 21 is provided on the upper thermal cover 2, the second heating slot 21 is used in cooperation with the heating slot 11 to form a heating cavity, the crucible bracket 3 is mounted on the lower thermal cover 1 through a shaft rotation, the crucible bracket 3 is located in the heating cavity and is provided with a plurality of through holes 31, the plurality of through holes 31 enable the heating slot 11 to communicate with the second heating slot 21, correspondingly, the upper thermal cover 2 is provided with an escape slot 24 to ensure that when the upper thermal cover 2 and the lower thermal cover are combined at , the end faces of the upper thermal cover 2 and the lower thermal cover can be tightly attached to , so that the crucible bracket 3.

, the bottom of the heating groove 11 is provided with a groove 111, the resistance wires are located in the groove 111, the number of the grooves 111 is eight in this embodiment, the eight grooves 111 are evenly distributed along the bottom of the heating groove 11 in sequence, correspondingly, the number of the resistance wires is also eight, and the eight resistance wires are located in the eight grooves 111 respectively.

The heating groove 11 and the second heating groove 21 of this embodiment are matched to form a heating cavity, the size of the heating cavity can be set according to actual needs, the resistance wire is directly arranged at the bottom of the heating groove 11, when an object to be heated is heated, the crucible 8 with the object to be heated is placed on the crucible bracket 3 or the object to be heated is directly placed on the crucible bracket 3, and the heating speed is high.

Because the object to be heated can produce the flue gas in the heating process, in order to discharge the flue gas in the heating cavity, be equipped with louvre 22 on the upper heat preservation lid 2, louvre 22 is located second heating groove 21 top, and louvre 22 communicates with the external world, makes the flue gas discharge as early as possible. In order to facilitate the opening and closing of the upper heat-preservation cover 2, a handle 23 is arranged on the upper heat-preservation cover 2, and the handle 23 is positioned on the side end face of the upper heat-preservation cover 2.

The lower heat preservation cover 1 of this embodiment includes the lower heat preservation cover furnace lining, th heating groove 11 is located the lower heat preservation cover furnace lining, the lower heat preservation cover furnace lining comprises refractory material and insulation material, wherein be close to the heating chamber be refractory material, keep away from the heating chamber be insulation material, go up heat preservation cover 2 and include the upper heat preservation cover furnace lining, second heating groove 21 is located the upper heat preservation cover furnace lining, the upper heat preservation cover furnace lining comprises refractory material and insulation material, wherein be close to the heating chamber be refractory material, keep away from the heating chamber be insulation material.

The upper heat-insulating cover 2 of the embodiment further comprises an upper heat-insulating cover body, a heat dissipation cavity is formed by the upper heat-insulating cover furnace lining and the upper heat-insulating cover body, the heat dissipation cavity is communicated with the heat dissipation holes 22, a heat dissipation fence (not shown in the figure) is arranged on the back side surface of the upper heat-insulating cover body, and the heat dissipation fence is communicated with the heat dissipation holes 22 and the outside, so that smoke generated when an object to be heated is discharged.

The muffle furnace of the embodiment further comprises an electric cabinet 4 and a heat dissipation fan, wherein the electric cabinet 4 and the heat dissipation fan are located below the lower heat preservation cover 1, the mounting cavity is formed in the lower heat preservation cover 1, the heat dissipation fan is located in the mounting cavity, and when the muffle furnace heats an object to be heated, the heat dissipation fan is opened to enable parts in the muffle furnace to be rapidly cooled. The electrical cabinet 4 is provided with an air inlet 41, the air inlet 41 is located on a side end face of the electrical cabinet 4, the air inlet 41 is communicated with the installation cavity, the air inlet 41 is composed of a plurality of strip-shaped through holes 31, the air inlet 41 of the embodiment includes two, and the two air inlets 41 are respectively arranged on two sides of the electrical cabinet 4.

The muffle furnace of the embodiment further comprises an actuator, a rotary button 5, a power switch 6 and a display screen 7, wherein the rotary button 5, the power switch 6 and the display screen 7 are positioned on the front side surface of the electrical cabinet 4, as shown in fig. 3, the power switch 6 is used for controlling whether the muffle furnace is communicated with a power supply, and the display screen 7 can display the temperature in the heating cavity, the rotary button 5 is positioned on the front side surface of the electrical cabinet 4, the actuator is connected with the crucible bracket 3, the actuator is configured to press the rotary button 5 to enable the crucible bracket 3 to move upwards and rotate in the th direction, and the actuator is further configured to enable the crucible bracket 3 to rotate in the opposite direction of the th direction and move downwards when the rotary button 5 is reset, so that the crucible bracket 3 is reset.

Preferably, the executor of this embodiment, the function of display screen 7 and rotating button 5 all realizes through the controller, the controller is located the heating intracavity, executor and rotating button 5 all electricity are connected in the controller, the connected mode of controller and display screen 7 and executor belongs to prior art, and controller and display screen 7 all can be obtained through purchasing outward, it is no longer repeated here.

In this embodiment, the controller may be a centralized or distributed controller, for example, the controller may be single-chip microcomputers, or may be composed of a plurality of distributed single-chip microcomputers, and a control program may be run in the single-chip microcomputers to control the actuator to realize upward movement and rotation or rotation and downward movement, so as to realize outward rotation or resetting of the crucible holder 3.

The muffle furnace of the embodiment is small in furnace cavity volume, large in power, and during heating, the temperature rising speed is faster, specifically, the muffle furnace of the embodiment is heated to 600 ℃ for fifteen minutes, the design of the upper and the heat dissipation hole 22 of the embodiment enables the heat dissipation speed of the muffle furnace to be faster, twenty minutes is needed for cooling from 600 ℃ to 50 ℃.

Taking heating rice as an example, the operation process of the muffle furnace provided by the embodiment is described in detail as follows:

1) taking 8 (about 0.2g) rice samples, placing the crucibles 8, the volume of which is 5ml, in a crucible 8, and placing the crucibles 8 on a crucible holder 3;

2) heating the muffle furnace to 300 ℃ for five minutes and continuously heating for ten minutes, then heating the muffle furnace from 300 ℃ to 600 ℃ for fifteen minutes and continuously heating for fifty minutes, and thus finishing heating the rice sample;

3) the upper heat preservation cover 2 of the muffle furnace is opened, the heat dissipation fan is started, the resistance wire is cooled by the heat dissipation fan, the rotary button 5 is pressed, the crucible bracket 3 moves upwards and rotates to a region far away from the resistance wire along the th direction, the sample is cooled to 50 ℃ for about twenty minutes, the color is changed to grey white, the processing is completed, and the cooling of the rice sample is finished.

The rice sample needs hundred minutes after being heated to 50 ℃, the next batches of samples can be processed after hundred minutes, four batches of samples can be processed in days, the whole process of the traditional muffle furnace needs about 5 to 6 hours, only batches of samples can be processed every day, the percentage proportion of the temperature rise time and the temperature fall time of the muffle furnace provided by the embodiment to the total processing time is greatly reduced, and the processing speed of the samples is greatly improved.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1, muffle furnace, comprising:

the lower heat-insulation cover (1) is internally provided with an th heating groove (11), and the bottom of the th heating groove (11) is provided with a resistance wire;

the upper heat-insulation cover (2) is rotatably connected above the lower heat-insulation cover (1) and is matched with the lower heat-insulation cover (1) for use, a second heating groove (21) is formed in the upper heat-insulation cover (2), and the second heating groove (21) is matched with the -th heating groove (11) to form a heating cavity;

crucible bracket (3), its rotate install in on lower heat preservation lid (1), crucible bracket (3) are located the heating intracavity just be equipped with a plurality of through-holes (31) on crucible bracket (3), a plurality of through-hole (31) make heating bath (11) with second heating bath (21) intercommunication.

2. Muffle according to claim 1, characterized in that the heating groove (11) is provided with a groove (111) at the bottom, and the resistance wire is located in the groove (111).

3. The muffle furnace according to claim 1, wherein the upper heat-insulating cover (2) is provided with heat dissipation holes (22), and the heat dissipation holes (22) are communicated with the heating cavity and used for dissipating the flue gas in the heating cavity to the outside.

4. Muffle according to claim 3, wherein said louvers (22) are located at the top of said second heating channel (21).

5. Muffle according to claim 3, wherein the lower retaining cover (1) comprises a lower retaining cover lining, the upper retaining cover (2) comprises an upper retaining cover lining, and the -th heating channel (11) is located on the lower retaining cover lining and the second heating channel (21) is located on the upper retaining cover lining.

6. The muffle furnace of claim 5, wherein the upper heat-preserving cover (2) further comprises an upper heat-preserving cover body, the upper heat-preserving cover lining and the upper heat-preserving cover body form a heat dissipation cavity, the heat dissipation cavity is communicated with the heat dissipation holes (22), a heat dissipation fence is arranged on the back side surface of the upper heat-preserving cover body, and the heat dissipation fence is communicated with the heat dissipation holes (22) and the outside.

7. The muffle furnace according to of claims 1-6, further comprising an electrical cabinet (4) and a heat dissipation fan located below the lower thermal cover (1), wherein the lower thermal cover (1) is provided with a mounting cavity, and the heat dissipation fan is located in the mounting cavity.

8. The muffle of claim 7, wherein the electrical cabinet (4) is provided with an air inlet (41), the air inlet (41) is located on a side end face of the electrical cabinet (4), and the air inlet (41) is communicated with the mounting cavity.

9. Muffle according to claim 8, further comprising an actuator connected to the crucible holder (3) and a rotation button (5), the rotation button (5) being located on the front side of the electrical cabinet (4), the actuator being configured to move the crucible holder (3) upwards and rotate in direction when the rotation button (5) is pressed, the actuator being further configured to reset the crucible holder (3) when the rotation button (5) is reset.

10. Muffle furnace according to , according to claim 1-6, wherein a handle (23) is provided on the upper heat retaining cover (2), said handle (23) being located on a side end face of the upper heat retaining cover (2).