Muffle furnace

By installing air intake and exhaust regulating components in the muffle furnace, the problems of poor furnace door sealing and poor smoke exhaust are solved, enabling adjustable atmosphere in the furnace cavity and smooth exhaust, thus improving the maintainability and service life of the muffle furnace.

CN223610554UActive Publication Date: 2025-11-28浙江省辐射环境监测站(生态环境部辐射环境监测技术中心)
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Patent Information

Application Number
CN202423244387.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Priority Date
2024-03-29
Filing Date
2024-12-26
Publication Date
2025-11-28
Estimated Expiration
2034-12-26

AI Technical Summary

Technical Problem

Existing muffle furnaces suffer from high maintenance costs, poor door sealing, inadequate smoke extraction, and an inability to regulate the atmosphere inside the furnace cavity.

Method used

An air intake regulating component and an exhaust regulating component were designed, including an air intake port, an exhaust port, a sealing ring, an exhaust pipe, and a sealing component, to regulate the atmosphere inside the furnace cavity and ensure smooth exhaust.

Benefits of technology

It improves the maintainability and exhaust efficiency of the muffle furnace, ensures an adjustable atmosphere inside the furnace cavity, avoids carbon and oil buildup, and extends the service life of the muffle furnace.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223610554U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of muffle furnaces, in particular to a muffle furnace. The muffle furnace provided by the utility model solves the technical problem that the atmosphere in the furnace chamber of the muffle furnace cannot be adjusted in the prior art. The muffle furnace comprises a furnace body provided with a furnace chamber, the furnace body is provided with a furnace door for sealing the furnace chamber, and a sealing ring is arranged between the furnace door and the furnace body; the furnace door is provided with an air inlet hole communicated with the furnace chamber, and is also provided with an air inlet adjusting assembly for adjusting the air inlet quantity of the air inlet hole; the furnace body is provided with an exhaust hole communicated with the furnace cavity, and the exhaust hole is provided with an exhaust adjusting assembly for adjusting the exhaust amount of the exhaust hole. By arranging the air inlet adjusting assembly and the exhaust adjusting assembly, the atmosphere in the furnace chamber can be conveniently adjusted, and the performance of the muffle furnace is optimized.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of muffle furnace, especially to a muffle furnace. BACKGROUND

[0002] Radiation monitoring biological sample pre -treatment uses muffle furnace for sample ashing treatment in large quantities, the main problems that the muffle furnace in prior art encounters in actual use include:

[0003] (1) the maintenance cost is high, and even because of spare parts and the like cannot be repaired in time;

[0004] (2) the furnace door handle is unreasonably designed, cannot be adjusted, and the sealing asbestos sealing effect is poor, is easy to damage, and affects the effect of sample ashing treatment;

[0005] (3) the smoke outlet is designed to be small, is easy to be blocked by sugar coke, carbon deposit and oil stain generated by biological sample, causes that smoke (gas) is not smooth, even forms a sealed circle leakage, carbon deposit;

[0006] (4) cannot control and adjust the atmosphere in the furnace cavity.

[0007] Therefore, the muffle furnace in prior art has the technical problem that the atmosphere in the furnace cavity cannot be adjusted. UTILITY MODEL CONTENTS

[0008] The utility model provides a kind of muffle furnace, solve the technical problem that muffle furnace in prior art cannot adjust the atmosphere in the furnace cavity.

[0009] Some implementation solutions for solving the above technical problems include:

[0010] A muffle furnace, comprising a furnace body provided with a furnace cavity;

[0011] The furnace body is provided with a furnace door sealing the furnace cavity, and a sealing ring is arranged between the furnace door and the furnace body.

[0012] The furnace door is provided with an air inlet hole communicating with the furnace cavity, and the furnace door is further provided with an air inlet adjusting assembly adjusting the air inlet amount of the air inlet hole.

[0013] The furnace body is provided with an air outlet hole communicating with the furnace cavity, and the air outlet hole is provided with an air outlet adjusting assembly adjusting the air outlet amount of the air outlet hole.

[0014] The air outlet adjusting assembly is provided with an air outlet pipe guiding the gas discharged by the air outlet adjusting assembly, the air outlet pipe is inserted into the air outlet adjusting assembly, and a sealing assembly preventing gas leakage is arranged between the air outlet pipe and the air outlet adjusting assembly.

[0015] Preferably, the air intake adjusting assembly is an air intake adjusting valve.

[0016] Preferably, the air intake adjusting assembly comprises a cover plate covering the air intake hole, the cover plate being rotatably connected to the oven door so as to seal the air intake hole or misalign the cover plate with the air intake hole.

[0017] Preferably, a sealing gasket is arranged between the cover plate and the oven door, the sealing gasket being bonded to the cover plate, and the position of the cover plate relative to the air intake hole being defined by the friction between the sealing gasket and the oven door.

[0018] Preferably, the air intake adjusting assembly comprises a cover plate, the cover plate being slidably connected to the oven door, the oven door being provided with a track, the track being provided with a guide groove cooperating with the cover plate, one end of the track being provided with an adjusting stud for adjusting the position of the cover plate, the cover plate being provided with a screw hole cooperating with the stud, and the adjusting stud being rotatably connected to the track.

[0019] Preferably, a sealing gasket is arranged between the cover plate and the oven door, the sealing gasket being bonded to the cover plate.

[0020] Preferably, the air intake hole has at least two.

[0021] Preferably, the air exhaust adjusting assembly is an air exhaust adjusting valve.

[0022] Preferably, the sealing assembly comprises an inner cylinder arranged in the air exhaust adjusting valve, an outer cylinder being arranged outside the inner cylinder, a lower end of the outer cylinder being fixed to the inner cylinder through a connecting ring, the inner cylinder, the outer cylinder and the connecting ring being of an integrated structure, a sealing cavity being formed between the inner cylinder and the outer cylinder, the exhaust pipe being inserted into the sealing cavity, and the sealing cavity being filled with a liquid, a portion of the exhaust pipe being immersed in the liquid.

[0023] Preferably, the oven door is rotatably connected to the oven body through a hinge, and a lock catch is further arranged between the oven body and the oven door to lock the oven door.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] 1. By arranging the air exhaust hole and the air exhaust adjusting assembly, the water vapor evaporated in the oven cavity can be easily and timely discharged, and thus the water vapor will not directly contact the resistance wire, so that the muffle furnace is not easy to be damaged. Meanwhile, the water vapor can be rapidly discharged, so that the muffle furnace can realize the drying function.

[0026] 2. By arranging the air intake hole and the air intake adjusting assembly, the air intake can be adjusted according to the ashing speed.

[0027] 3. The exhaust pipe is inserted into the exhaust adjusting assembly, which is convenient for cleaning carbon and oil.

[0028] By setting the air inlet adjusting assembly and the exhaust adjusting assembly, the atmosphere in the furnace cavity can be conveniently adjusted, and the performance of the muffle furnace is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0029] For the purpose of explanation, several embodiments of the present utility model technology are set forth in the following drawings. The following drawings are incorporated in this text and form part of the specific embodiments. In some cases, the well-known structures and components are shown in block diagram form in order to avoid obscuring the concepts of the present utility model subject technology.

[0030] Figure 1 It is the front view of the present utility model.

[0031] Figure 2 It is the schematic view of the first angle of the present utility model.

[0032] Figure 3 It is the schematic view of the second angle of the present utility model.

[0033] Figure 4 It is the schematic view of the first angle after the furnace door of the present utility model is opened.

[0034] Figure 5 It is the schematic view of the second angle after the furnace door of the present utility model is opened.

[0035] Figure 6 It is the explosion view of the sealing assembly.

[0036] In the drawing:

[0037] 1. The furnace body, 11. The furnace cavity, 12. The sealing ring, 13. The exhaust hole, 14. The exhaust adjusting assembly, 15. The exhaust pipe, 16. The sealing assembly, 161. The inner cylinder, 162. The outer cylinder, 163. The sealing cavity.

[0038] 2. The furnace door, 21. The air inlet hole, 22. The air inlet adjusting assembly, 221. The cover plate, 222. The track, 223. The adjusting stud. DETAILED DESCRIPTION

[0039] The specific embodiments shown below are intended to be a description of various configurations of the present utility model subject technology and are not intended to represent the only configurations in which the present utility model subject technology can be practiced. The specific embodiments include specific details for the purpose of providing a thorough understanding of the present utility model subject technology. However, it will be apparent to those skilled in the art that the present utility model subject technology is not limited to the specific details presented herein and can be practiced without these specific details.

[0040] Referring to Figures 1 to 6 A muffle furnace, as shown in the drawings, comprises a furnace body 1 provided with a furnace cavity 11;

[0041] The furnace body 1 is provided with a furnace door 2 sealing the furnace cavity 11, and a sealing ring 12 is arranged between the furnace door 2 and the furnace body 1. An installation groove for installing the sealing ring 12 can be arranged on the furnace body 1, and the sealing ring 12 is installed in the installation groove by elastic deformation. Since the sealing ring 12 plays a sealing function, in order to enable the sealing ring 12 to effectively contact the furnace door 2, a part of the sealing ring 12 is located in the installation groove.

[0042] The furnace door 2 is provided with an air inlet hole 21 communicating with the furnace cavity 11, and the furnace door 2 is further provided with an air inlet adjusting assembly 22 adjusting the air inlet amount of the air inlet hole 21;

[0043] The furnace body 1 is provided with an air outlet hole 13 communicating with the furnace cavity 11, and the air outlet hole 13 is provided with an air outlet adjusting assembly 14 adjusting the air outlet amount of the air outlet hole 13;

[0044] The air outlet adjusting assembly 14 is provided with an air outlet pipe 15 guiding the gas discharged by the air outlet adjusting assembly 14, the air outlet pipe 15 is inserted into the air outlet adjusting assembly 14, and a sealing assembly 16 preventing gas leakage is arranged between the air outlet pipe 15 and the air outlet adjusting assembly 14.

[0045] In some embodiments, the air inlet adjusting assembly 22 is an air inlet adjusting valve. The air inlet adjusting valve is a flow adjusting valve adjusting the flow of gas in the prior art.

[0046] Referring to Figure 1 In some embodiments, when the furnace door 2 is not suitable for being provided with an air inlet adjusting valve, the air inlet adjusting assembly 22 comprises a cover plate 221 covering the air inlet hole 21, and the cover plate 221 is rotationally connected to the furnace door 2 to enable the cover plate 221 to seal the air inlet hole 21 or to enable the cover plate 221 to be misaligned with the air inlet hole 21.

[0047] A sealing gasket is arranged between the cover plate 221 and the furnace door 2, the sealing gasket is bonded to the cover plate 221, and the position of the cover plate 221 relative to the air inlet hole 21 is defined by the friction between the cover plate 221 and the furnace door 2 by means of the sealing gasket.

[0048] When the cover plate 221 is completely misaligned with the air inlet hole 21, the air inlet hole 21 has the maximum air inlet amount, the misalignment range of the cover plate 221 relative to the air inlet hole 21, i.e. the opening range of the air inlet hole 21, controls the air inlet amount of the air inlet hole 21, and the scheme of using the cover plate 221 enables the air inlet adjusting assembly 22 to have a simple structure and be easy to maintain.

[0049] Referring toFigures 2 to 3 As shown, in some embodiments, the cover plate 221 is positioned by the friction between the sealing gasket and the oven door 2, which has the problem of poor stability, i.e. the cover plate 221 may be misoperated under the action of gravity. In practice, the position of the cover plate 221 may need to have higher stability.

[0050] The cover plate 221 can also be arranged on the oven door 2 by the following scheme: the air inlet adjusting assembly 22 comprises a cover plate 221, the cover plate 221 is slidingly connected to the oven door 2, the oven door 2 is provided with a track 222, the track 222 is provided with a guide groove matched with the cover plate 221, one end of the track 222 is provided with an adjusting stud 223 for adjusting the position of the cover plate 221, the cover plate 221 is provided with a threaded hole matched with the stud, and the adjusting stud 223 is rotatably connected to the track 222.

[0051] The adjusting stud 223 is rotatably connected to the track 222 by a rolling bearing. A first protruding plate can be arranged on the track 222, which can be an integral structure with the track 222. The first protruding plate is provided with a first through hole, and the adjusting stud 223 is installed in the first through hole through the rolling bearing. That is, the inner ring of the rolling bearing is fixedly connected with the adjusting stud 223, and the outer ring of the rolling bearing is fixedly connected with the first through hole. The rolling bearing can be a deep groove ball bearing.

[0052] A sealing gasket is arranged between the cover plate 221 and the oven door 2, and the sealing gasket is bonded to the cover plate 221.

[0053] In some embodiments, the air inlet hole 21 has at least two. The number of air inlet holes 21 is not limited and can be freely selected.

[0054] In some embodiments, the air outlet adjusting assembly 14 is an air outlet adjusting valve.

[0055] Referring to Figures 1 to 6 As shown, in some embodiments, the sealing assembly 16 comprises an inner cylinder 161 arranged on the air outlet adjusting valve, an outer cylinder 162 arranged outside the inner cylinder 161, the lower end of the outer cylinder 162 being fixed to the inner cylinder 161 through a connecting ring, the inner cylinder 161, the outer cylinder 162 and the connecting ring being an integral structure, a sealing cavity 163 being formed between the inner cylinder 161 and the outer cylinder 162, the exhaust pipe 15 being inserted into the sealing cavity 163, and the sealing cavity 163 being filled with a liquid, a part of the exhaust pipe 15 being immersed in the liquid.

[0056] A shoulder can also be arranged on the exhaust pipe 15, which is used to limit the position of the exhaust pipe 15 relative to the inner cylinder 161 or the outer cylinder 162. The shoulder can be an integral structure with the exhaust pipe 15. The shoulder is lapped on the upper end surface of the inner cylinder 161 or the outer cylinder 162.

[0057] The number of exhaust holes 13 can be one, two or more, and each exhaust hole 13 is provided with an exhaust adjusting assembly 14.

[0058] In some embodiments, the oven door 2 is connected to the oven body 1 by a hinge, and a lock catch is further arranged between the oven body 1 and the oven door 2 to lock the oven door 2.

[0059] The lock catch is a common structure in the prior art, and the lock catch can be fixed to the oven body 1 by riveting. A lock hook that cooperates with the lock catch can be arranged on the oven door 2, and the lock hook can be fixed to the oven door 2 by riveting.

[0060] The hinge can be fixed to the oven body 1 and the oven door 2 by riveting, respectively.

[0061] The above describes the subject technical scheme of the utility model and the corresponding details. It should be understood that the above description is only some embodiments of the subject technical scheme of the utility model, and some details can be omitted in the specific implementation.

[0062] In addition, in some embodiments of the above utility model, a plurality of embodiments can be combined for implementation, and various combination schemes are not listed one by one due to the limited space. Those skilled in the art can freely combine the above embodiments according to the needs in the specific implementation to obtain better application experience.

[0063] Those skilled in the art can obtain other detailed configurations or drawings according to the subject technical scheme of the utility model and the drawings when implementing the subject technical scheme of the utility model. Obviously, these details still belong to the scope covered by the subject technical scheme of the utility model without departing from the subject technical scheme of the utility model.

Claims

1. A muffle characterized in that: The oven body (1) is provided with an oven cavity (11); The oven body (1) is provided with an oven door (2) sealing the oven cavity (11), and a sealing ring (12) is arranged between the oven door (2) and the oven body (1); The oven door (2) is provided with an air inlet hole (21) communicating with the oven cavity (11), and an air inlet adjusting assembly (22) is arranged on the oven door (2) to adjust the air inlet amount of the air inlet hole (21); The oven body (1) is provided with an air outlet hole (13) communicating with the oven cavity (11), and an air outlet adjusting assembly (14) is arranged on the air outlet hole (13) to adjust the air outlet amount of the air outlet hole (13); The air outlet adjusting assembly (14) is provided with an air outlet pipe (15) guiding the gas discharged by the air outlet adjusting assembly (14), the air outlet pipe (15) is inserted into the air outlet adjusting assembly (14), and a sealing assembly (16) is arranged between the air outlet pipe (15) and the air outlet adjusting assembly (14) to prevent gas leakage.

2. The muffle of claim 1, wherein: The air inlet adjusting assembly (22) is an air inlet adjusting valve.

3. The muffle of claim 1, wherein: The air inlet adjusting assembly (22) includes a cover plate (221) covering the air inlet hole (21), and the cover plate (221) is rotationally connected to the oven door (2) to seal the air inlet hole (21) or misalign the cover plate (221) with the air inlet hole (21).

4. The muffle of claim 3, wherein: A sealing gasket is arranged between the cover plate (221) and the oven door (2), the sealing gasket is bonded to the cover plate (221), and the position of the cover plate (221) relative to the air inlet hole (21) is defined by the friction between the cover plate (221) and the oven door (2) using the sealing gasket.

5. The muffle of claim 1, wherein: The air inlet adjusting assembly (22) includes a cover plate (221) slidingly connected to the oven door (2), the oven door (2) is provided with a track (222) provided with a guide groove matched with the cover plate (221), one end of the track (222) is provided with an adjusting stud (223) adjusting the position of the cover plate (221), the cover plate (221) is provided with a screw hole matched with the stud, and the adjusting stud (223) is rotationally connected to the track (222).

6. The muffle of claim 5, wherein: A sealing gasket is arranged between the cover plate (221) and the oven door (2), and the sealing gasket is bonded to the cover plate (221).

7. The muffle of any one of claims 1 to 6, characterized in that: The air inlet hole (21) has at least two.

8. The muffle of claim 1, wherein: The air outlet adjusting assembly (14) is an air outlet adjusting valve.

9. The muffle of claim 8, wherein: The sealing assembly (16) comprises an inner cylinder (161) arranged in the exhaust adjusting valve, an outer cylinder (162) is arranged outside the inner cylinder (161), the lower end of the outer cylinder (162) is fixed to the inner cylinder (161) through a connecting ring, the inner cylinder (161), the outer cylinder (162) and the connecting ring are in an integral structure, a sealing cavity (163) is formed between the inner cylinder (161) and the outer cylinder (162), the exhaust pipe (15) is inserted into the sealing cavity (163), the sealing cavity (163) is filled with liquid, and a part of the exhaust pipe (15) is immersed in the liquid.

10. The muffle of claim 1, wherein: The furnace door (2) is rotatably connected to the furnace body (1) through a hinge, and a lock catch for locking the furnace door (2) is further arranged between the furnace body (1) and the furnace door (2).