Muffle furnace capable of preventing reagent pollution
By using a full-inclusive silicon carbide furnace lining and split silicon carbide door frame and cavity in the muffle furnace, the problem of slag pollution during use is solved, and the product quality is improved and the cleanliness of reagents is guaranteed.
Patent Information
- Application Number
- CN202421781772.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-26
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-26
AI Technical Summary
The existing muffle furnace may drop slag during use and contaminate the fired products, resulting in a decline in product quality.
A muffle furnace including a full-inclusive silicon carbide furnace lining is designed. The silicon carbide material is heat-conductive and resistant to high temperatures, which can prevent slag from falling out of the furnace, and is conveniently installed through the silicon carbide door frame and cavity with a split structure.
It effectively prevents slag from falling out in the furnace, improves the quality of the fired products, and ensures the cleanliness of the reagents.
Smart Images
Figure CN222849725U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of heating equipment, in particular to a muffle furnace capable of preventing reagent contamination. Background Art
[0002] A muffle furnace is a general heating equipment with a quite wide application range. It can be used for the analysis of chemical raw materials and chemicals, as sample treatment in fields such as water quality analysis and environmental analysis; in the pharmaceutical field, it can be used for the pretreatment of drug inspection and medical samples, and in the fields of coal, geology and mining, and petroleum, it can be used for the determination of moisture, ash content, volatile content, ash melting point analysis, ash component analysis, petroleum analysis, element analysis, and can also be used as a general ashing furnace; in the field of heat treatment of industrial workpieces and the cement and building materials industries, it can carry out the heat treatment or processing of small workpieces. The existing muffle furnace may drop slag during use and contaminate the fired products. Content of the Utility Model
[0003] In view of this, the utility model aims to provide a muffle furnace capable of preventing reagent contamination 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 capable of preventing reagent contamination includes a box body and an inner liner. The front side of the box body is open and provided with a box door, and the inner liner is arranged inside the box body; the inner liner includes a hearth, a heating plate, a furnace lining arranged from outside to inside in sequence, and a fixing plate fixed on the outer side wall of the hearth; the hearth includes a discrete upper side wall of the hearth, a lower side wall of the hearth, a left side wall of the hearth, a right side wall of the hearth, a rear side wall of the hearth and a front door frame, and the fixing plate is used to connect each side wall and the front door frame of the hearth into a whole; the material of the furnace lining is silicon carbide, and the furnace lining includes a silicon carbide door frame and a silicon carbide cavity. The silicon carbide cavity includes a discrete upper side wall of the silicon carbide, a lower side wall of the silicon carbide, a left side wall of the silicon carbide, a right side wall of the silicon carbide and a rear side wall of the silicon carbide. The heating plate is sandwiched between the corresponding side walls of the hearth and the furnace lining, and the silicon carbide door frame is clamped on the front door frame; above the opening of the front side wall of the box body, there is a baffle with a 7-shaped cross section.
[0006] Further, the silicon carbide door frame includes two left and right door frames and two upper and lower door frames. On the outer side walls of the left and right door frames and the upper and lower door frames, there are respectively provided U-shaped first clamping grooves and second clamping grooves. The first clamping grooves and the second clamping grooves jointly form an annular groove and are clamped on the front door frame.
[0007] Further, the front door frame is spliced into a square structure with a hollow center by two U-shaped structures. The rear side wall inside the square with a hollow center is recessed to form an annular recessed groove, so that the first clamping groove and the second clamping groove can be clamped therein.
[0008] Furthermore, the inner side walls of the left and right door frames and the upper and lower door frames are inclined surfaces, so that the inner wall of the silicon carbide door frame surrounded by the left and right door frames and the upper and lower door frames forms a trumpet shape.
[0009] Furthermore, the upper parts of both ends of the upper and lower door frames protrude to form protruding parts, and the upper parts of both ends of the left and right door frames are provided with clamping parts matching with the protruding parts.
[0010] Furthermore, the structures of the upper side wall of silicon carbide and the lower side wall of silicon carbide are the same, and the structures of the left side wall of silicon carbide and the right side wall of silicon carbide are the same; steps are provided at the two ends of the upper side wall of silicon carbide and the lower side wall of silicon carbide where they contact the left side wall of silicon carbide and the right side wall of silicon carbide, respectively, and the left side wall of silicon carbide and the right side wall of silicon carbide are clamped at the corresponding steps, respectively.
[0011] Further, the width of the step is equal to the thickness of the left side wall 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.
[0012] Furthermore, grooves for accommodating the heating plate are provided on the inner walls of the left side wall and the right side wall of the furnace.
[0013] Furthermore, a thermocouple jack and an exhaust hole are respectively provided on the rear side wall of the furnace and the rear side wall of the silicon carbide, and ceramic tubes are inserted into the thermocouple jack and the exhaust hole.
[0014] Furthermore, an exhaust pipe connected to the exhaust hole is also provided on the box body.
[0015] Compared with the prior art, the muffle furnace capable of preventing reagent contamination described in the utility model has the following advantages:
[0016] (1) The muffle furnace capable of preventing reagent contamination described in the utility model is provided with a fully enclosed furnace lining made of silicon carbide on the inner side of the furnace. Silicon carbide is heat-conductive and high-temperature-resistant, which can prevent slag from falling from the furnace and affecting the quality of the fired products.
[0017] (2) The furnace lining described in the present invention includes a silicon carbide door frame and a silicon carbide cavity. Both the silicon carbide door frame and the silicon carbide cavity are split structures, which are convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] 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:
[0019] Figure 1 This is a schematic diagram of the structure of a muffle furnace capable of preventing reagent contamination according to an embodiment of the utility model;
[0020] Figure 2 This is a schematic diagram of the structure of the inner container according to an embodiment of the utility model;
[0021] Figure 3 This is a diagram of the internal structure of the inner container according to an embodiment of the utility model;
[0022] Figure 4 This is a schematic structural diagram of the front door frame according to an embodiment of the utility model;
[0023] Figure 5 It is a structural schematic diagram of the furnace lining according to an embodiment of the utility model;
[0024] Figure 6 This is a schematic structural diagram of a silicon carbide door frame according to an embodiment of the utility model;
[0025] Figure 7 This is a schematic structural diagram of a silicon carbide cavity according to an embodiment of the utility model;
[0026] Figure 8 This is a schematic structural diagram of the left and right door frames according to an embodiment of the utility model;
[0027] Fig. 9 It is a schematic structural diagram of the upper and lower door frames described in an embodiment of the utility model.
[0028] Description of reference numerals:
[0029] 1. Box body; 2. Box door; 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; 3212 1. 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
[0030] 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.
[0031] 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.
[0032] 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.
[0033] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.
[0034] like Figure 1-9As shown in the figure, a muffle furnace capable of preventing reagent contamination includes a box body 1 and an inner liner 3. The front side of the box body 1 is open and is provided with a box door 2. The inner side of the box door 2 is provided with a sealing layer 21, and the edge of the sealing layer is beveled. The inner liner 3 is arranged inside the box body 1; the inner liner 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 separate 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 a whole; 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 separate upper side wall of the silicon carbide 3221, a lower side wall of the silicon carbide 3222, a left side wall of the silicon carbide 3223, a right side wall of the silicon carbide 3224, and a rear side wall of the silicon carbide 3225. 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.
[0035] 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 the furnace chamber from dropping slag and affecting the quality of the fired products.
[0036] 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. The outer side walls of the left and right door frames 3211 and the upper and lower door frames 3212 are respectively provided with 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.
[0037] Specifically, as Figure 4 shown, the front door frame 316 is spliced into a square structure by two U-shaped structures. The rear side wall inside the square is recessed to form an annular recessed groove 3161 to facilitate the first clamping groove 32111 and the second clamping groove 32121 to be clamped therein.
[0038] 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 horn shape; the inclination of the beveled surface matches the inclination of the edge of the sealing layer on the box door.
[0039] Specifically, as Fig. 9 shown, the upper parts of both ends of the upper and lower door frames 3212 protrude to form protruding parts 32123, as 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.
[0040] 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, and the structures of the silicon carbide left side wall 3223 and the silicon carbide right side wall 3224 are the same; 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, and the silicon carbide left side wall 3223 and the silicon carbide right side wall 3224 are clamped at the corresponding steps 32221, respectively.
[0041] Specifically, the width of the step 32221 is equal to the thickness of the left side wall 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.
[0042] The silicon carbide door frame and silicon carbide cavity are both split structures, which are easy to install.
[0043] 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 .
[0044] 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.
[0045] Exemplarily, the box body 1 is further provided with an exhaust pipe 5 connected to the exhaust hole 32252 .
[0046] 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 capable of preventing reagent contamination, characterized in that: It includes a box body and an inner tank. The front side of the box body is open and provided with a box door, and the inner tank is arranged inside the box body; the inner tank includes a furnace chamber, a heating plate, a furnace lining arranged from outside to inside in sequence, and a fixing plate fixed on the outer side wall of the furnace chamber; the furnace chamber includes a discrete upper side wall of the furnace chamber, a lower side wall of the furnace chamber, a left side wall of the furnace chamber, a right side wall of the furnace chamber, a rear side wall of the furnace chamber and a front door frame, and the fixing plate is used to connect the side walls and the front door frame of the furnace chamber into a whole; the material of the furnace lining is silicon carbide, the furnace lining includes a silicon carbide door frame and a silicon carbide cavity, the silicon carbide cavity includes a discrete upper side wall of the silicon carbide, a lower side wall of the silicon carbide, a left side wall of the silicon carbide, a right side wall of the silicon carbide and a rear side wall of the silicon carbide, the heating plate is clamped between the corresponding side walls of the furnace chamber and the furnace lining, and the silicon carbide door frame is clamped on the front door frame; above the opening of the front side wall of the box body, there is a baffle with a 7-shaped cross section.
2. The muffle furnace capable of preventing reagent contamination according to claim 1, characterized in that: The silicon carbide door frame includes two left-right door frames and two up-down door frames. On the outer side walls of the left-right door frames and the up-down door frames, there are respectively provided U-shaped first clamping grooves and second clamping grooves. The first clamping grooves and the second clamping grooves jointly form an annular groove and are clamped on the front door frame.
3. The muffle furnace capable of preventing reagent contamination according to claim 2, characterized in that: The front door frame is spliced into a square structure by two U-shaped structures. The rear side wall inside the square is recessed to form an annular recessed groove to facilitate the first clamping groove and the second clamping groove to be clamped therein.
4. The muffle furnace capable of preventing reagent contamination according to claim 2, characterized in that: The inner side walls of the left-right door frames and the up-down door frames are inclined planes, so that the inner wall of the silicon carbide door frame formed by the left-right door frames and the up-down door frames is in a horn shape.
5. The muffle furnace capable of preventing reagent contamination according to claim 2, characterized in that: At the upper parts of both ends of the up-down door frames, there are convex parts protruding, and at the upper parts of both ends of the left-right door frames, there are clamping parts matching the convex parts.
6. The muffle furnace capable of preventing reagent contamination according to claim 1, characterized in that: The structures of the upper side wall of the silicon carbide and the lower side wall of the silicon carbide are the same, and the structures of the left side wall of the silicon carbide and the right side wall of the silicon carbide are the same; at the contact positions where the two ends of the upper side wall of the silicon carbide and the lower side wall of the silicon carbide are respectively in contact with the left side wall of the silicon carbide and the right side wall of the silicon carbide, there are steps, and the left side wall of the silicon carbide and the right side wall of the silicon carbide are respectively clamped at the corresponding steps.
7. The muffle furnace capable of preventing reagent contamination according to claim 6, characterized in that: The width of the step is equal to the thickness of the left side wall of the silicon carbide, and the thicknesses of the left side wall of the silicon carbide and the right side wall of the silicon carbide are the same.
8. The muffle furnace capable of preventing reagent contamination according to claim 1, characterized in that: On the inner side walls of the left side wall of the furnace chamber and the right side wall of the furnace chamber, there are both grooves for conveniently placing the heating plate.
9. The muffle furnace capable of preventing reagent contamination according to claim 1, characterized in that: On the rear side wall of the furnace chamber and the rear side wall of the silicon carbide, there are respectively provided a thermocouple jack and an exhaust hole, and ceramic tubes are inserted in both the thermocouple jack and the exhaust hole.
10. The muffle furnace capable of preventing reagent contamination according to claim 9, characterized in that: On the box body, there is also an exhaust pipe communicated with the exhaust hole.