Muffle furnace lining

Abstract

The utility model provides a muffle furnace lining which comprises a silicon carbide door frame and a silicon carbide cavity, and the silicon carbide cavity comprises a silicon carbide upper side wall, a silicon carbide lower side wall, a silicon carbide left side wall, a silicon carbide right side wall and a silicon carbide rear side wall which are spliced in a split mode. The silicon carbide door frame is spliced on the front side of the silicon carbide cavity, the silicon carbide door frame comprises a left door frame, a right door frame, an upper door frame and a lower door frame which are spliced separately, a first U-shaped clamping groove and a second U-shaped clamping groove are formed in the outer side walls of the left door frame, the right door frame, the upper door frame and the lower door frame respectively, and the first clamping groove and the second clamping groove jointly define an annular groove and are clamped on the front door frame. The muffle furnace lining is wrapped on the inner side of the hearth, and the silicon carbide material is heat-conducting and high-temperature-resistant, so that the hearth can be prevented from slag falling, the firing temperature can be ensured, and the quality of a fired product is not influenced. In addition, the silicon carbide door frame and the silicon carbide cavity are both of a split structure, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the field of heating equipment, in particular to a muffle furnace lining. Background Art

[0002] A muffle furnace is a general heating equipment with a quite wide range of applications. During the use of the existing muffle furnace, slag may fall off and contaminate the fired products. If a layer of furnace lining made of high-temperature resistant material is added inside the furnace chamber, the influence of slag falling on the products can be avoided. Content of the Utility Model

[0003] In view of this, the utility model aims to provide a muffle furnace lining to solve the above problems.

[0004] To achieve the above object, the technical solution of the utility model is realized as follows:

[0005] A muffle furnace lining includes a silicon carbide door frame and a silicon carbide cavity. The silicon carbide cavity includes a silicon carbide upper side wall, a silicon carbide lower side wall, a silicon carbide left side wall, a silicon carbide right side wall and a silicon carbide rear side wall which are separately spliced; the silicon carbide door frame is spliced on the front side of the silicon carbide cavity. The silicon carbide door frame includes two left and right door frames and two upper and lower door frames which are separately spliced. C-shaped first clamping grooves and second clamping grooves are respectively arranged on the outer side walls of the left and right door frames and the upper and lower door frames. The first clamping grooves and the second clamping grooves jointly form an annular groove and are clamped on the front door frame.

[0006] Further, the inner side walls of the left and right door frames and the upper and lower door frames are inclined planes, so that the inner wall of the silicon carbide door frame formed by the left and right door frames and the upper and lower door frames is in a horn shape; the inclination degree of the inclined plane matches the inclination degree of the edge of the sealing layer on the box door.

[0007] Further, the upper parts of the two ends of the upper and lower door frames protrude to form protruding parts, and clamping parts matching the protruding parts are arranged on the upper parts of the two ends of the left and right door frames.

[0008] Further, the silicon carbide upper side wall and the silicon carbide lower side wall have the same structure, and the silicon carbide left side wall and the silicon carbide right side wall have the same structure; steps are formed by depressions at the contact positions of the left and right ends of the silicon carbide upper side wall and the silicon carbide lower side wall with the silicon carbide left side wall and the silicon carbide right side wall respectively, and the silicon carbide left side wall and the silicon carbide right side wall are respectively clamped at the corresponding steps.

[0009] Further, the width of the step is equal to the thickness of the silicon carbide left side wall, and the silicon carbide left side wall and the silicon carbide right side wall have the same thickness.

[0010] Further, a thermocouple jack and an exhaust hole are arranged on the silicon carbide rear side wall, and ceramic tubes are inserted into both the thermocouple jack and the exhaust hole.

[0011] Compared with the prior art, the muffle furnace lining described in the utility model has the following advantages:

[0012] The muffle furnace lining of the utility model is coated on the inner side of the furnace, and the silicon carbide material is heat-conductive and high-temperature resistant, which can prevent the furnace from falling slag while ensuring the firing temperature, and does not affect the quality of the fired products. In addition, the silicon carbide door frame and the silicon carbide cavity are both split structures, which are easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0014] Figure 1 It is a structural schematic diagram of the muffle furnace lining according to an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the inner container according to an embodiment of the utility model;

[0016] Figure 3 This is a diagram of the internal structure of the inner container according to an embodiment of the utility model;

[0017] Figure 4 This is a schematic structural diagram of the front door frame according to an embodiment of the utility model;

[0018] Figure 5 It is a structural schematic diagram of the furnace lining according to an embodiment of the utility model;

[0019] Figure 6 This is a schematic structural diagram of a silicon carbide door frame according to an embodiment of the utility model;

[0020] Figure 7 This is a schematic structural diagram of a silicon carbide cavity according to an embodiment of the utility model;

[0021] Figure 8 This is a schematic structural diagram of the left and right door frames according to an embodiment of the utility model;

[0022] Fig. 9 It is a schematic structural diagram of the upper and lower door frames described in an embodiment of the utility model.

[0023] Description of reference numerals:

[0024] 1. Box body; 2. Box door; 21. Sealing layer; 3. Inner liner; 31. Furnace; 311. Upper side wall of furnace; 312. Lower side wall of furnace; 313. Left side wall of furnace; 3131. Groove; 314. Right side wall of furnace; 315. Rear side wall of furnace; 316. Front door frame; 3161. Inner groove; 32. Furnace lining; 321. Silicon carbide door frame; 3211. Left and right door frames; 32111. First slot; 32112. Clamping part; 3212. Upper and lower door frames; 3 2121, second card slot; 32122, inclined surface; 32123, protrusion; 322, silicon carbide cavity; 3221, silicon carbide upper side wall; 3222, silicon carbide lower side wall; 32221, step; 3223, silicon carbide left side wall; 3224, silicon carbide right side wall; 3225, silicon carbide rear side wall; 32251, thermocouple jack; 32252, exhaust hole; 33, heating plate; 34, fixing plate; 4, baffle; 5, exhaust pipe; 6, ceramic tube. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] As Figure 1-9 shown, a muffle furnace capable of preventing reagent contamination includes a box body 1 and an inner tank 3. The front side of the box body 1 is open and provided with a box door 2. A sealing layer 21 is provided on the inner side of the box door 2, and the edge of the sealing layer is beveled. The inner tank 3 is arranged inside the box body 1; the inner tank 3 includes a furnace chamber 31, a heating plate 33, a furnace lining 32 arranged in sequence from outside to inside, and a fixing plate 34 fixed on the outer side wall of the furnace chamber 31; the furnace chamber 31 includes a separately arranged upper side wall of the furnace chamber 31, a lower side wall of the furnace chamber 31, a left side wall of the furnace chamber 31, a right side wall of the furnace chamber 31, a rear side wall of the furnace chamber 31, and a front door frame 316. The fixing plate 34 is used to connect the side walls and the front door frame 316 of the furnace chamber 31 into one body; the material of the furnace lining 32 is silicon carbide. The furnace lining 32 includes a silicon carbide door frame 321 and a silicon carbide cavity 322. The silicon carbide cavity 322 includes a separately arranged upper side wall 3221 of the silicon carbide, a lower side wall 3222 of the silicon carbide, a left side wall 3223 of the silicon carbide, a right side wall 3224 of the silicon carbide, and a rear side wall 3225 of the silicon carbide. The heating plate 33 is sandwiched between the corresponding side walls of the furnace chamber 31 and the furnace lining 32. The silicon carbide door frame 321 is clamped on the front door frame 316; above the opening at the front side wall of the box body 1, there is a baffle 4 with a 7-shaped cross section, and the baffle can prevent the upper edge of the opening from being blackened by high temperature.

[0030] The muffle furnace is provided with a fully enclosed furnace lining made of silicon carbide on the inner side of the furnace chamber. Silicon carbide has good heat conduction and high temperature resistance, which can prevent slag from falling from the furnace chamber and affecting the quality of the fired products.

[0031] Exemplarily, as Figure 6 shown, the silicon carbide door frame 321 includes two left and right door frames 3211 and two upper and lower door frames 3212. On the outer side walls of the left and right door frames 3211 and the upper and lower door frames 3212, there are respectively provided U-shaped first clamping grooves 32111 and second clamping grooves 32121. The first clamping grooves 32111 and the second clamping grooves 32121 jointly form an annular groove and are clamped on the front door frame 316.

[0032] Specifically, as Figure 4 shown, the front door frame 316 is formed by splicing two U-shaped structures into a square structure with a hollow center. The rear side wall inside the square structure is recessed to form an annular recessed groove 3161 to facilitate the first clamping grooves 32111 and the second clamping grooves 32121 to be clamped therein.

[0033] Specifically, as Figure 5 and 6 shown, the inner side walls of the left and right door frames 3211 and the upper and lower door frames 3212 are beveled surfaces 32122, so that the inner wall of the silicon carbide door frame 321 formed by the left and right door frames 3211 and the upper and lower door frames 3212 is in a trumpet shape; the inclination of the beveled surface matches the inclination of the edge of the sealing layer on the box door.

[0034] Specifically, Fig. 9 As shown, the upper portions of both ends of the upper and lower door frames 3212 protrude to form protruding portions 32123, as shown in FIG. Figure 8 As shown, the upper parts of both ends of the left and right door frames 3211 are provided with clamping parts 32112 matching with the protruding parts 32123.

[0035] For example, Figure 7 As shown, the structures of the silicon carbide upper side wall 3221 and the silicon carbide lower side wall 3222 are the same, the structures of the silicon carbide left side wall 3223 and the silicon carbide right side wall 3224 are the same, and steps 32221 are provided at the two ends of the silicon carbide upper side wall 3221 and the silicon carbide lower side wall 3222 where they contact the silicon carbide left side wall 3223 and the silicon carbide right side wall 3224 respectively, and the silicon carbide left side wall 3223 and the silicon carbide right side wall 3224 are clamped at the corresponding steps 32221 respectively.

[0036] Specifically, the width of the step 32221 is equal to the thickness of the left side wall 3223 of the silicon carbide, and the thickness of the left side wall of the silicon carbide is the same as the thickness of the right side wall of the silicon carbide.

[0037] The silicon carbide door frame and silicon carbide cavity are both split structures, which are easy to install.

[0038] For example, Figure 3 As shown, grooves 3131 for accommodating the heating plate 33 are provided on the inner walls of the left side wall of the furnace 31 and the right side wall of the furnace 31 .

[0039] Exemplarily, a thermocouple socket 32251 and an exhaust hole 32252 are respectively provided on the rear side wall of the furnace 31 and the silicon carbide rear side wall 3225. Ceramic tubes 6 are inserted into the thermocouple socket 32251 and the exhaust hole 32252 to prevent slag from falling from the thermocouple socket and the exhaust hole and entering the heating chamber.

[0040] Exemplarily, the box body 1 is further provided with an exhaust pipe 5 connected to the exhaust hole 32252 .

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A muffle furnace lining, characterized in that: It includes a silicon carbide doorframe and a silicon carbide cavity. The silicon carbide cavity includes a silicon carbide upper sidewall, a silicon carbide lower sidewall, a silicon carbide left sidewall, a silicon carbide right sidewall, and a silicon carbide rear sidewall that are discretely spliced; the silicon carbide doorframe is spliced on the front side of the silicon carbide cavity. The silicon carbide doorframe includes two left-right doorframes and two up-down doorframes that are discretely spliced. The outer sidewalls of the left-right doorframes and the up-down doorframes are respectively provided with U-shaped first card slots and second card slots. The first card slots and the second card slots jointly form an annular groove and are clamped on the front doorframe.

2. The muffle furnace lining according to claim 1, characterized in that: The inner sidewalls of the left-right doorframes and the up-down doorframes are inclined surfaces, so that the inner wall of the silicon carbide doorframe formed by the left-right doorframes and the up-down doorframes is in a flared shape; the inclination of the inclined surface matches the inclination of the edge of the sealing layer on the box door.

3. The muffle furnace lining according to claim 1, characterized in that: The upper parts of both ends of the up-down doorframes protrude to form protruding parts, and the upper parts of both ends of the left-right doorframes are provided with clamping parts that match the protruding parts.

4. The muffle furnace lining according to claim 1, characterized in that: The structures of the silicon carbide upper sidewall and the silicon carbide lower sidewall are the same, and the structures of the silicon carbide left sidewall and the silicon carbide right sidewall are the same; steps are formed by depressions at the contact points where the left and right ends of the silicon carbide upper sidewall and the silicon carbide lower sidewall respectively contact the silicon carbide left sidewall and the silicon carbide right sidewall, and the silicon carbide left sidewall and the silicon carbide right sidewall are respectively clamped at the corresponding steps.

5. The muffle furnace lining according to claim 4, characterized in that: The width of the step is equal to the thickness of the silicon carbide left sidewall, and the thicknesses of the silicon carbide left sidewall and the silicon carbide right sidewall are the same.

6. The muffle furnace lining according to claim 1, characterized in that: Thermocouple jacks and exhaust holes are provided on the silicon carbide rear sidewall, and ceramic tubes are inserted into both the thermocouple jacks and the exhaust holes.

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