Muffle furnace convenient to open

Abstract

The utility model provides a muffle furnace convenient to open. The muffle furnace comprises a furnace body, a furnace door, a driving mechanism, a limiting mechanism and a connecting mechanism, the furnace door is an electric door and is controlled to be opened through a driving mechanism and a limiting mechanism, manual operation is not needed, the electric door can ensure that an operator does not need to make direct contact with the high-temperature furnace door in a high-temperature environment, and therefore the risk of scalding and other safety accidents is reduced; through electric control, the furnace door can be automatically opened and closed in the experiment process, and the safety of the experiment process is ensured. Wherein the limiting mechanism comprises a limiting plate and two photoelectric proximity switches, the limiting plate is fixed on the rotating shaft and can rotate along with the rotating shaft, and when the limiting plate rotates to the photoelectric proximity switches, the furnace door can be triggered to be opened or closed.

Description

Technical Field

[0001] This utility model relates to the field of muffle furnace technology, and in particular to a muffle furnace that is easy to open. Background Technology

[0002] Muffle furnaces are commonly used heating instruments in laboratory analysis and industrial production, specifically for heating samples at high temperatures for roasting, melting, and ashing. Existing muffle furnaces require operators to manually open the furnace door. Due to the very high temperature inside the muffle furnace, burns or other safety accidents may occur, posing a risk to the operator's safety. Utility Model Content

[0003] In view of this, the present invention aims to provide an easy-to-open muffle furnace to solve the above problems.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An easy-to-open muffle furnace includes a furnace body, a furnace door, a drive mechanism, a limiting mechanism, and a connecting mechanism. The furnace body includes an upper furnace chamber and a lower equipment cavity. The furnace door is installed on the front side of the furnace chamber. The drive mechanism and the limiting mechanism are located inside the equipment cavity. The drive mechanism includes a motor and a rotating shaft. The rotating shaft is driven to rotate by the motor and is vertically arranged. The furnace door is connected to the rotating shaft through the connecting mechanism. The limiting mechanism includes a limiting plate, a first photoelectric proximity switch, a second photoelectric proximity switch, and a mounting bracket. The limiting plate is fixed on the rotating shaft. The mounting bracket is installed on the side wall below the limiting plate. The rotating shaft passes through the mounting bracket and is rotatably connected to the mounting bracket. The first photoelectric proximity switch and the second photoelectric proximity switch are respectively located on the outer and inner sides of the mounting bracket. The limiting plate has through holes to facilitate the passage of light beams emitted by the first and second photoelectric proximity switches.

[0006] Furthermore, the connecting mechanism includes an upper mounting plate, an upper fixing plate, a lower mounting plate, a lower fixing plate, and a connecting plate; the upper mounting plate is fixed above the front opening of the furnace, the lower mounting plate is fixed below the front opening of the furnace, the upper end of the rotating shaft is rotatably mounted on the upper mounting plate, one end of the upper fixing plate is fixed on the rotating shaft, and the other end of the upper fixing plate is hinged to the inner side of the furnace door; one end of the lower fixing plate is also fixed on the rotating shaft, the other end of the lower fixing plate is hinged to the connecting plate, and the connecting plate is hinged to the inner side of the furnace door.

[0007] Furthermore, the drive mechanism also includes a reducer and a handwheel; the reducer is connected to the motor, the handwheel and the rotating shaft respectively, the connecting shaft of the handwheel is perpendicular to the rotating shaft, and the connecting shaft of the motor is parallel to the connecting shaft of the handwheel.

[0008] Furthermore, both the speed reducer and the motor are mounted on a bracket, which is fixed inside the equipment cavity.

[0009] Furthermore, a panel is provided on the front side of the equipment cavity, and the panel has a groove for hiding the handwheel, which is embedded in the groove.

[0010] Furthermore, a removable sealing cap is provided at the groove.

[0011] Furthermore, the mounting bracket is a 7-shaped plate, with an arc-shaped hole on the horizontal section of the mounting bracket, and a notch communicating with the arc-shaped hole on the horizontal section of the mounting bracket; the first photoelectric proximity switch and the second photoelectric proximity switch are installed in the arc-shaped hole.

[0012] Compared with existing technologies, the easy-to-open muffle furnace described in this utility model has the following advantages:

[0013] The muffle furnace door of this invention is an electric door, controlled by a drive mechanism and a limiting mechanism, requiring no manual operation. The electric door ensures that operators do not need to directly contact the high-temperature furnace door in high-temperature environments, thus reducing the risk of burns and other safety accidents. Through electric control, the furnace door can be automatically opened and closed during experiments, ensuring the safety of the experimental process. The limiting mechanism includes a limiting plate and two photoelectric proximity switches. The limiting plate is fixed on a rotating shaft and can rotate with the shaft. When the limiting plate rotates to the photoelectric proximity switch position, it triggers the opening or closing of the furnace door. Attached Figure Description

[0014] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of the easy-to-open muffle furnace described in an embodiment of the present invention;

[0016] Figure 2 This is an internal structural diagram of the easy-to-open muffle furnace described in an embodiment of the present invention;

[0017] Figure 3 This is a partial enlarged view of point A of the easy-to-open muffle furnace described in this embodiment of the present invention;

[0018] Figure 4 This is a structural diagram of the furnace door described in an embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Furnace body; 2. Furnace door; 3. Panel; 31. Groove; 32. Sealing cover; 4. Drive mechanism; 41. Reducer; 42. Motor; 43. Rotating shaft; 44. Handwheel; 45. Bracket; 5. Limiting mechanism; 51. Limiting plate; 52. First photoelectric proximity switch; 53. Second photoelectric proximity switch; 54. Mounting bracket; 55. Arc-shaped hole; 56. Notch; 57. Through hole; 6. Connecting mechanism; 61. Upper mounting plate; 62. Upper fixing plate; 63. Lower mounting plate; 64. Lower fixing plate; 65. Connecting plate. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1-4As shown, an easy-to-open muffle furnace includes a furnace body 1, a furnace door 2, a drive mechanism 4, a limiting mechanism 5, and a connecting mechanism 6. The furnace body 1 includes an upper furnace chamber and a lower equipment cavity. The furnace door 2 is installed on the front side of the furnace chamber. The drive mechanism 4 and the limiting mechanism 5 are located inside the equipment cavity. The drive mechanism 4 includes a motor 42 and a rotating shaft 43. The rotating shaft 43 is driven to rotate by the motor 42 and is vertically arranged. The furnace door 2 is connected to the rotating shaft 43 through the connecting mechanism 6. The limiting mechanism 5 includes a limiting plate 51, a first photoelectric proximity switch 52, a second photoelectric proximity switch 53, and a mounting bracket 54. The limiting plate 51 is fixed on the rotating shaft 43. The mounting bracket 54 is installed on the side wall below the limiting plate 51. The rotating shaft 43 passes through the mounting bracket 54 and is rotatably connected to the mounting bracket 54. The first photoelectric proximity switch 52 and the second photoelectric proximity switch 53 are respectively located on the outer and inner sides of the mounting bracket 54. The limiting plate 51 is provided with a through hole 57 to facilitate the passage of the light beams emitted by the first photoelectric proximity switch 52 and the second photoelectric proximity switch 53.

[0026] The equipment cavity is equipped with a controller, which is connected to the motor, the first photoelectric proximity switch, and the second photoelectric proximity switch.

[0027] The muffle furnace door described in this utility model is an electric door, which is controlled to open by a drive mechanism and a limit mechanism, eliminating the need for manual operation. The electric door ensures that operators do not need to directly contact the high-temperature furnace door in high-temperature environments, thereby reducing the risk of burns and other safety accidents. Through electric control, the furnace door can be automatically opened and closed during the experiment, ensuring the safety of the experiment.

[0028] The limiting mechanism includes a limiting plate and two photoelectric proximity switches. The limiting plate is fixed on the rotating shaft and can rotate with the rotating shaft. When the limiting plate rotates to the photoelectric proximity switch, it can trigger the opening or closing of the furnace door.

[0029] like Figure 4 As shown, the second photoelectric proximity switch 53 is activated when the furnace door is opened to a predetermined position, causing the motor to stop working. This indicates that the furnace door is now fully open. The first photoelectric proximity switch 51 is normally closed when the furnace door is closed. As soon as the furnace door is opened, the photoelectric switch will activate to control the heating system to stop heating. This is the door-opening power-off function, which prevents personnel from accidentally touching the sample and causing electric shock. Only when the furnace door is fully closed will the first photoelectric proximity switch 51 continue to work and the heating system will be powered on again.

[0030] For example, the connecting mechanism 6 includes an upper mounting plate 61, an upper fixing plate 62, a lower mounting plate 63, a lower fixing plate 64, and a connecting plate 65; the upper mounting plate 61 is fixed above the front opening of the furnace, the lower mounting plate 63 is fixed below the front opening of the furnace, the upper end of the rotating shaft 43 is rotatably mounted on the upper mounting plate 61, one end of the upper fixing plate 62 is fixed on the rotating shaft 43, and the other end of the upper fixing plate 62 is hinged to the inner side of the furnace door 2; one end of the lower fixing plate 64 is also fixed on the rotating shaft 43, and the other end of the lower fixing plate 64 is hinged to the connecting plate 65, and the connecting plate 65 is hinged to the inner side of the furnace door 2.

[0031] When the shaft rotates, it drives the upper fixed plate 62 and the lower fixed plate 64 to rotate, thereby opening the furnace door.

[0032] For example, the drive mechanism 4 also includes a reducer 41 and a handwheel 44; the reducer 41 is connected to the motor 42, the handwheel 44 and the rotating shaft 43 respectively, the connecting shaft of the handwheel 44 is perpendicular to the rotating shaft 43, and the connecting shaft of the motor 42 is parallel to the connecting shaft of the handwheel 44.

[0033] The handwheel is designed to allow the electric door to be opened manually if it cannot be opened.

[0034] Specifically, both the reducer 41 and the motor 42 are mounted on the bracket 45, which is fixed inside the equipment cavity.

[0035] Specifically, the front side of the equipment cavity is provided with a panel 3, and the panel 3 is provided with a groove 31 to facilitate the concealment of the handwheel 44, which is embedded in the groove 31.

[0036] More specifically, a removable sealing cap 32 is also provided at the groove 31.

[0037] For example, the mounting bracket 54 is a 7-shaped plate, and the horizontal section of the mounting bracket 54 is provided with an arc-shaped hole 55, and the horizontal section of the mounting bracket 54 is also provided with a notch 56 communicating with the arc-shaped hole 55; the first photoelectric proximity switch 52 and the second photoelectric proximity switch 53 are installed in the arc-shaped hole 55.

[0038] The notch design facilitates the insertion of the first photoelectric proximity switch 52 and the second photoelectric proximity switch 53 into the arc-shaped hole. Afterward, the first photoelectric proximity switch 52 and the second photoelectric proximity switch 53 are moved along the arc-shaped hole to the set position for installation.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A muffle furnace that is easy to open, characterized in that: The furnace includes a furnace body, a furnace door, a drive mechanism, a limiting mechanism, and a connecting mechanism. The furnace body includes an upper furnace chamber and a lower equipment cavity. The furnace door is installed on the front side of the furnace chamber. The drive mechanism and the limiting mechanism are located inside the equipment cavity. The drive mechanism includes a motor and a rotating shaft. The rotating shaft is driven to rotate by the motor and is vertically arranged. The furnace door is connected to the rotating shaft through the connecting mechanism. The limiting mechanism includes a limiting plate, a first photoelectric proximity switch, a second photoelectric proximity switch, and a mounting bracket. The limiting plate is fixed on the rotating shaft. The mounting bracket is installed on the side wall below the limiting plate. The rotating shaft passes through the mounting bracket and is rotatably connected to the mounting bracket. The first photoelectric proximity switch and the second photoelectric proximity switch are respectively located on the outer and inner sides of the mounting bracket. The limiting plate has through holes to facilitate the passage of light beams emitted by the first and second photoelectric proximity switches.

2. The easy-to-open muffle furnace according to claim 1, characterized in that: The connecting mechanism includes an upper mounting plate, an upper fixing plate, a lower mounting plate, a lower fixing plate, and a connecting plate. The upper mounting plate is fixed above the front opening of the furnace, and the lower mounting plate is fixed below the front opening of the furnace. The upper end of the rotating shaft is rotatably mounted on the upper mounting plate. One end of the upper fixing plate is fixed to the rotating shaft, and the other end of the upper fixing plate is hinged to the inside of the furnace door. One end of the lower fixing plate is also fixed to the rotating shaft, and the other end of the lower fixing plate is hinged to the connecting plate. The connecting plate is hinged to the inside of the furnace door.

3. The easy-to-open muffle furnace according to claim 1, characterized in that: The drive mechanism also includes a reducer and a handwheel; the reducer is connected to the motor, the handwheel and the shaft respectively, the connecting shaft of the handwheel is perpendicular to the shaft, and the connecting shaft of the motor is parallel to the connecting shaft of the handwheel.

4. The easy-to-open muffle furnace according to claim 3, characterized in that: Both the speed reducer and the motor are mounted on a bracket, which is fixed inside the equipment cavity.

5. The easy-to-open muffle furnace according to claim 3, characterized in that: The front of the equipment cavity is provided with a panel, and the panel has a groove for hiding the handwheel, which is embedded in the groove.

6. The easy-to-open muffle furnace according to claim 5, characterized in that: The groove also features a removable sealing cap.

7. The easy-to-open muffle furnace according to claim 1, characterized in that: The mounting bracket is a 7-shaped plate with an arc-shaped hole on the horizontal section and a notch on the horizontal section that communicates with the arc-shaped hole; the first photoelectric proximity switch and the second photoelectric proximity switch are installed in the arc-shaped hole.

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