Semi-closed electric furnace

Abstract

The utility model relates to the technical field of electric furnaces, in particular to a semi-closed electric furnace. The utility model discloses a semi-closed electric furnace. The semi-closed electric furnace comprises a furnace base, a furnace plate is fixedly installed on the furnace base, an electric heating wire is installed in the furnace plate, a furnace cylinder is fixedly installed on the furnace plate, and a furnace cover which is detachably connected with the furnace cylinder is installed on the furnace cylinder. And a protection assembly is mounted in a mounting cavity between the furnace barrel and the furnace cover. According to the clothes hanger with the locking function, the electric heating wire installed in the furnace plate can not be exposed outside through the protection assembly, the hidden danger that the electric heating wire is polluted by dust or damaged due to falling of other objects is avoided, and when the diameter of the container is smaller than that of the through cavity formed in the furnace cover, the inner sliding area of the sealing and blocking blade can be adjusted, so that the electric heating wire can be locked. Part of the blocking blades are arranged above the electric heating wire to play a role of a support, and therefore the container can be directly placed on the support formed by the blocking blades to be heated.

Description

Technical Field

[0001] The utility model relates to the technical field of electric furnaces, in particular to a semi-enclosed electric furnace. Background Art

[0002] An electric furnace is a device that converts electrical energy into thermal energy to heat a workpiece. Currently, it is used in many university laboratories. Due to the high price and inconvenient maintenance of fully enclosed electric furnaces, they are not suitable for use in university and middle school laboratories. Traditional open electric furnaces are very cheap and suitable for students in university and middle school laboratories. However, open electric furnaces are particularly susceptible to damage. Their heating wires are exposed to the outside for a long time, which makes them susceptible to dust contamination or damage caused by falling objects. At the same time, some small containers are difficult to place directly on the open electric furnace, resulting in the need to constantly add placement racks to the open electric furnace, which is very troublesome.

[0003] Therefore, it is necessary to provide a new semi-enclosed electric furnace to solve the above-mentioned technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a semi-enclosed electric furnace.

[0005] The semi-enclosed electric furnace provided by the utility model comprises a furnace base, a furnace plate is fixedly mounted on the furnace base, and a heating wire is installed in the furnace plate, a furnace drum is fixedly mounted on the furnace plate, and a detachably connected furnace cover is installed on the furnace drum;

[0006] A protective component is installed in the installation cavity between the furnace barrel and the furnace cover, and the protective component includes a sealing leaf. A plurality of sealing leaves are provided, and each of the sealing leaves is installed in the furnace barrel by rotating through a rotating shaft. After the plurality of sealing leaves rotate and abut against adjacent sealing leaves, a circular closed structure for sealing the furnace plate is formed.

[0007] Preferably, the protective assembly also includes a rotating ring, which is rotatably installed in the furnace, and a plurality of annularly distributed internal teeth are fixedly embedded on the inner ring wall of the rotating ring, and a half-tooth portion is fixedly embedded at the end of each of the blocking leaves, and the half-tooth portion is meshed and connected with the corresponding internal tooth portion.

[0008] Preferably, the protective component also includes a guide arc plate, which is provided in multiple pieces, and the multiple guide arc plates are fixedly embedded in the rotating ring and distributed in a ring shape, and the guide arc plate passes through the arc sliding cavity opened in the furnace cover and is slidably connected to the arc sliding cavity.

[0009] Preferably, a handle is fixedly mounted on any one of the guide arc-shaped pieces.

[0010] Preferably, the guide arc pieces and the inner teeth are staggered.

[0011] Preferably, a through cavity is opened in the middle of the furnace cover.

[0012] Preferably, the furnace cover is fixed on the furnace drum by screws.

[0013] Compared with the related art, the semi-enclosed electric furnace provided by the present invention has the following beneficial effects:

[0014] 1. When the electric stove is not in use, the rotating handle drives the rotating ring to rotate clockwise. Since the semi-toothed portion on the sealing leaf is meshed with the inner toothed portion of the rotating ring, each sealing leaf rotates toward the center of the furnace tube until the sealing leaves abut against each other and form a circular closed structure for sealing the stove plate. At this time, the stove plate is sealed, so the heating wire installed in the stove plate will not be exposed to the outside, avoiding the hidden danger of the heating wire being contaminated by dust or damaged by other objects falling on it.

[0015] 2. When the electric furnace of the present invention is used, the rotating handle drives the rotating ring to rotate counterclockwise. At this time, each sealing leaf rotates away from the center of the furnace tube, so that each sealing leaf separates from each other and is screwed into the furnace cover on the inner side of the through cavity. At this time, the heating wire is exposed, and the container to be heated can be placed on the furnace cover. In addition, when the diameter of the container is smaller than the through cavity opened by the furnace cover, the area of ​​the inner sliding of the sealing leaf can be adjusted so that part of the sealing leaf is placed above the heating wire to act as a bracket, so that the container can be directly placed on the bracket formed by the sealing leaf for heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of a semi-enclosed electric furnace provided by the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the explosion structure shown;

[0018] Figure 3 for Figure 1 A schematic diagram of the structure of the protective assembly shown not installed;

[0019] Figure 4 for Figure 1 A schematic diagram of the structure of the furnace cover without being installed;

[0020] Figure 5 for Figure 2 Schematic diagram of the protection component structure shown.

[0021] Numbers in the figure: 1. furnace base; 2. furnace plate; 3. heating wire; 4. furnace barrel; 41. furnace cover; 41a. through cavity; 41b. arc-shaped sliding cavity; 5. protective component; 51. blocking blade; 52. half tooth portion; 53. rotating shaft; 54. rotating ring; 55. inner tooth portion; 56. guide arc piece; 57. handle. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0024] See also Figures 1 to 5 The embodiment of the present invention provides a semi-enclosed electric furnace, which includes a furnace base 1 and a protective assembly 5. A furnace plate 2 is fixedly mounted on the furnace base 1, and a heating wire 3 is installed in the furnace plate 2. A furnace barrel 4 is fixedly mounted on the furnace plate 2, and a detachable furnace cover 41 is installed on the furnace barrel 4. A through cavity 41a is opened in the middle of the furnace cover 41. Specifically, the furnace cover 41 is fixedly mounted on the furnace barrel 4 by screws, so that the furnace cover 41 can be removed from the furnace barrel 4 to facilitate maintenance of the protective assembly 5.

[0025] In the embodiments of the present invention, please refer to Figures 1 to 5 A protective assembly 5 is installed in the installation cavity between the furnace drum 4 and the furnace cover 41, and the protective assembly 5 includes a plurality of sealing leaves 51. Each sealing leaf 51 is rotatably installed in the furnace drum 4 through a rotating shaft 53. After the plurality of sealing leaves 51 rotate and abut against adjacent sealing leaves 51, a circular closed structure for sealing the furnace plate 2 is formed;

[0026] The protective assembly 5 also includes a rotating ring 54, which is rotatably installed in the furnace drum 4, and a plurality of annularly distributed internal teeth 55 are fixedly embedded on the inner ring wall of the rotating ring 54. A half tooth portion 52 is fixedly embedded at the end of each blocking leaf 51, and the half tooth portion 52 is meshed and connected with the corresponding internal tooth portion 55.

[0027] It should be noted that: when the electric stove is not in use, the rotating handle 57 drives the rotating ring 54 to rotate clockwise (with the Figure 5Taking this as an example, since the half teeth 52 on the sealing leaves 51 are meshed with the inner teeth 55 of the rotating ring 54, each sealing leaf 51 rotates toward the center of the furnace tube 4 until the sealing leaves 51 abut against each other and form a circular closed structure for sealing the furnace plate 2. At this time, the furnace plate 2 is sealed, so the heating wire 3 installed in the furnace plate 2 is not exposed to the outside, thereby avoiding the risk of the heating wire 3 being contaminated by dust or damaged by falling objects;

[0028] When the electric stove is in use, the rotating handle 57 drives the rotating ring 54 to rotate counterclockwise (with the Figure 5 As an example, the sealing leaves 51 rotate away from the center of the furnace tube 4, so that the sealing leaves 51 separate from each other and rotate into the furnace cover 41 inside the through cavity 41a. At this time, the heating wire 3 is exposed, and the container to be heated can be placed on the furnace cover 41.

[0029] In addition, when the diameter of the container is smaller than the through cavity 41a opened by the furnace cover 41, the area of ​​the inner sliding of the sealing leaf 51 can be adjusted so that part of the sealing leaf 51 is placed above the heating wire 3 to act as a support, so that the container can be directly placed on the support formed by the sealing leaf 51 for heating.

[0030] Furthermore, in order to improve the stability of the rotating ring 54 when the furnace drum 4 rotates, a guide arc piece 56 is added to the protective component 5. Specifically, the protective component 5 also includes a guide arc piece 56, and the guide arc piece 56 is provided with multiple pieces. The multiple guide arc pieces 56 are fixedly embedded in the rotating ring 54 and are distributed in a ring shape, and the guide arc pieces 56 are staggered with the inner teeth 55. The guide arc piece 56 passes through the arc sliding cavity 41b opened in the furnace cover 41 and is slidably connected to the arc sliding cavity 41b. A handle 57 is fixedly installed on any one of the guide arc pieces 56. Therefore, the guide arc piece 56 cooperates with the arc sliding cavity 41b opened in the furnace cover 41 to not only improve the stability of the rotating ring 54 when the furnace drum 4 rotates, but also limit the rotation angle of the blocking leaf 51, and the handle 57 makes it convenient for the staff to drive the rotating ring 54 to rotate.

[0031] The working principle of the semi-enclosed electric furnace provided by the utility model is as follows:

[0032] When the electric stove is not in use, the rotating handle 57 drives the rotating ring 54 to rotate clockwise (with the Figure 5As an example, since the half teeth 52 on the blocking leaves 51 are meshed with the inner teeth 55 of the rotating ring 54, each blocking leaf 51 rotates toward the center of the furnace tube 4 until each blocking leaf 51 abuts against each other and forms a circular closed structure for sealing the furnace plate 2. At this time, the furnace plate 2 is sealed, so the heating wire 3 installed in the furnace plate 2 will not be exposed to the outside, avoiding the hidden danger of the heating wire 3 being contaminated by dust or damaged by other objects falling. When the electric stove is used, the rotating handle 57 drives the rotating ring 54 to rotate counterclockwise (with the attached Figure 5 Taking the example as an example), at this time, each sealing leaf 51 rotates away from the center of the furnace tube 4, so that each sealing leaf 51 separates from each other and is screwed into the furnace cover 41 inside the through cavity 41a. At this time, the heating wire 3 is exposed, and the container to be heated can be placed on the furnace cover 41 later; in addition, when the diameter of the container is smaller than the through cavity 41a opened by the furnace cover 41, the area of ​​the inner sliding of the sealing leaf 51 can be adjusted so that part of the sealing leaf 51 is placed above the heating wire 3 to act as a bracket, so that the container can be directly placed on the bracket formed by the sealing leaf 51 for heating.

[0033] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0034] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A semi-enclosed electric furnace, comprising a furnace base (1), a furnace plate (2) fixedly mounted on the furnace base (1), a heating wire (3) mounted in the furnace plate (2), a furnace drum (4) fixedly mounted on the furnace plate (2), and a detachably connected furnace cover (41) mounted on the furnace drum (4), characterized in that: A protective assembly (5) is installed in the installation cavity between the furnace barrel (4) and the furnace cover (41), and the protective assembly (5) includes a plurality of sealing leaves (51). Each of the sealing leaves (51) is rotatably installed in the furnace barrel (4) via a rotating shaft (53). The plurality of sealing leaves (51) rotate and abut against adjacent sealing leaves (51) to form a circular closed structure for sealing the furnace plate (2).

2. The semi-enclosed electric furnace according to claim 1, characterized in that: The protection assembly (5) further comprises a rotating ring (54), the rotating ring (54) being rotatably mounted in the furnace drum (4), and a plurality of annularly distributed inner teeth (55) being fixedly engaged on the inner ring wall of the rotating ring (54), and a half-tooth portion (52) being fixedly engaged at the end of each of the blocking leaves (51), and the half-tooth portion (52) being meshedly connected with the corresponding inner teeth (55).

3. The semi-enclosed electric furnace according to claim 2, characterized in that: The protection component (5) further includes a guide arc-shaped piece (56), wherein the guide arc-shaped piece (56) is provided in a plurality of pieces, and the plurality of guide arc-shaped pieces (56) are fixedly embedded in the rotating ring (54) and distributed in a ring shape, and the guide arc-shaped piece (56) passes through the arc-shaped sliding cavity (41b) opened in the furnace cover (41) and is slidably connected to the arc-shaped sliding cavity (41b).

4. The semi-enclosed electric furnace according to claim 3, characterized in that: A handle (57) is fixedly mounted on any one of the guide arc-shaped pieces (56).

5. The semi-enclosed electric furnace according to claim 3, characterized in that: The guide arc-shaped pieces (56) and the inner tooth portion (55) are distributed in an alternating manner.

6. The semi-enclosed electric furnace according to claim 1, characterized in that: A through cavity (41a) is provided in the middle of the furnace cover (41).

7. The semi-enclosed electric furnace according to claim 1, characterized in that: The furnace cover (41) is fixedly mounted on the furnace drum (4) by screws.

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