Multifunctional muffle furnace with high sealing performance

Abstract

The utility model discloses a multifunctional muffle furnace with high sealing performance, which belongs to the technical field of muffle furnaces and comprises a furnace body, and a furnace chamber is arranged in the furnace body. The furnace door is correspondingly arranged in front of the furnace body opening; the sealing mechanism is arranged between the furnace door and the furnace body; the connecting mechanism is used for connecting the furnace body and the furnace door and comprises a two-body connecting rod, a two-door connecting rod and a hinge rod, one end of the two-body connecting rod and one end of the two-door connecting rod are hinged to the hinge rod, and the ends, away from the hinge rod, of the two-body connecting rod are hinged to the upper end and the lower end of the opening side of the furnace body correspondingly; one ends of the two door connecting rods far away from the hinge rod are respectively hinged to the upper end and the lower end of the furnace door; and the hasps are circumferentially and uniformly arranged at the joint of the furnace body and the furnace door. According to the muffle furnace, the furnace door can translate right opposite to the furnace body instead of being buckled in a rotating mode when a traditional furnace door is buckled, so that the furnace door is not prone to being clamped or inclined, the furnace door is fastened in the circumferential direction through the hasps, the sealing mechanism can be better extruded, and the sealing performance of the muffle furnace is better.

Description

Technical Field

[0001] The utility model belongs to the technical field of muffle furnaces, and particularly relates to a high-sealing multi-functional muffle furnace. Background Art

[0002] A muffle furnace is a general heating device, which can be divided into a box furnace, a tube furnace and a crucible furnace according to the appearance shape. There are several common names for muffle furnaces in China: electric furnace, resistance furnace, Maofu furnace, Mafu furnace. It mainly uses an electric current to heat the electric heating elements or heating medium in the furnace to heat workpieces or materials. Muffle furnaces are mainly used in industry for preheating metals before forging, heat treatment of metals, brazing, sintering of powder metallurgy, roasting and annealing of glass ceramics, melting of low-melting-point metals, drying of paint film layers, etc.

[0003] The muffle furnace has very high requirements for temperature control in industrial processing. There needs to be a high seal between the door panel and the opening of the furnace cavity in the muffle furnace. Otherwise, the heat in the furnace cavity is likely to leak, resulting in poor stability of the temperature in the furnace cavity and reducing the quality of workpieces.

[0004] Chinese Patent No. CN220270026U discloses a multi-functional muffle furnace, which includes a fixed seat. A furnace body is arranged on the upper surface of the fixed seat. A box door is hinged at a position near the left end of the front end face of the furnace body. A transparent window is embedded in the middle of the box door. The hollow area between the inner wall and the outer wall of the furnace body is a water storage layer. A drain pipe is embedded at a position near the bottom of the right end face of the furnace body. A liquid inlet pipe is embedded at the top of the furnace body. A heat insulation plate is sleeved on the outer wall of the furnace body. Universal wheels are arranged at positions near the four corners of the lower surface of the fixed seat. However, one end of the furnace door of this muffle furnace is hinged to the furnace cavity, and the other end is fastened to the furnace cavity through a buckle. This connection method rotates the furnace door from the side and buckles it to the opening of the furnace cavity, and it is only fastened through a buckle on one side, which easily causes uneven force on the furnace door, warping and air leakage on the side, and also easily causes the sealing ring to be stuck or not inserted in place during insertion, making it difficult to achieve sealing.

[0005] Therefore, a high-sealing multi-functional muffle furnace is proposed. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model proposes a high-sealing multi-functional muffle furnace.

[0007] To achieve the above object, the utility model provides a high-sealing multi-functional muffle furnace, including:

[0008] A furnace body, in which a furnace cavity is provided;

[0009] A furnace door, correspondingly arranged in front of the opening of the furnace body;

[0010] A sealing mechanism, arranged between the furnace door and the furnace body;

[0011] a connecting mechanism for connecting the furnace body and the furnace door, comprising two body connecting rods, two door connecting rods and a hinged rod, one end of each of the two body connecting rods and the two door connecting rods being hinged to the hinged rod, one end of each of the two body connecting rods being away from the hinged rod being hinged to the upper and lower ends of the furnace body opening side, and one end of each of the two door connecting rods being away from the hinged rod being hinged to the upper and lower ends of the furnace door;

[0012] A plurality of buckles are evenly arranged at the connection between the furnace body and the furnace door in a circumferential direction.

[0013] Preferably, the buckle includes a hook and a ring, the hook is fixed to the outer side wall of the furnace door, and the ring is fixed to the outer side wall of the furnace body corresponding to the position of the hook when the furnace body and the furnace door are buckled together.

[0014] Preferably, the furnace body includes a heating layer, a heat-insulating layer and a fixing layer, and the heating layer, the heat-insulating layer and the fixing layer are fixedly connected in sequence from the inside to the outside, and the furnace cavity is arranged in the heating layer.

[0015] Preferably, a plurality of overlapping strips are provided in pairs on both sides of the inner wall of the heating layer, and frame plates are overlapped on the overlapping strips.

[0016] Preferably, the sealing mechanism includes a sealing gasket and several sealing rings; the sealing gasket is fixed to the position where the fixed layer contacts the furnace door, and the several sealing rings are arranged in a circular shape and fixed to the inner side of the furnace door, and a sealing groove is opened on the insulation layer corresponding to the sealing ring.

[0017] Preferably, a protrusion is protruding from the center of the furnace door corresponding to the furnace cavity.

[0018] Preferably, an air pressure valve is fixedly installed on the top of the furnace body, and the air pressure valve connects the furnace cavity with the outside world.

[0019] Preferably, support legs are fixedly connected to the four corners of the bottom of the furnace body, and the support legs are retractable.

[0020] Compared with the prior art, the present invention has the following advantages and technical effects:

[0021] The heated workpiece is placed in the furnace cavity of the furnace body. When the furnace door and the furnace body are open, there is a certain distance between the furnace door and the furnace body due to the length of the body connecting rod and the door connecting rod. The hinged rod allows the furnace door to rotate around the furnace body, making it convenient to put in and take out the workpiece in the furnace cavity; when closed, the furnace door can be rotated to face the furnace body opening, and the furnace door is pushed close to the furnace body, and then the furnace door and the furnace body are fastened by the buckle. The buckle applies mutual locking force from multiple positions around the furnace door, and the force is more evenly applied. Moreover, because the furnace door can be translated relative to the furnace body, instead of rotating and locking when the traditional furnace door is locked, it is not easy to be stuck or tilted, and the sealing mechanism can be better squeezed to make the muffle furnace more sealed. Brief Description of the Drawings

[0022] The drawings forming a part of this application are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application. In the drawings:

[0023] Figure 1 is a schematic structural diagram of the high-sealing multi-functional muffle furnace of the present utility model;

[0024] Figure 2 is a cross-sectional view of the high-sealing multi-functional muffle furnace of the present utility model;

[0025] Figure 3 is a schematic structural diagram of the high-sealing multi-functional muffle furnace in the open state of the present utility model;

[0026] Figure 4 is a schematic structural diagram of the state where the furnace door faces the furnace body in the present utility model.

[0027] In the figure: 1. Furnace body; 101. Heating layer; 102. Heat insulation layer; 103. Fixed layer; 2. Furnace cavity; 3. Furnace door; 4. Body connecting rod; 5. Door connecting rod; 6. Hinge rod; 7. Buckle; 701. Hook; 702. Loop; 8. Lapping strip; 9. Shelf board; 10. Sealing gasket; 11. Sealing ring; 12. Sealing groove; 13. Protrusion; 14. Pressure valve; 15. Support leg. Detailed Description of the Preferred Embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the drawings and specific embodiments.

[0030] Referring to Figures 1 to 4 as shown, this embodiment provides a high-sealing multi-functional muffle furnace, including:

[0031] ; A furnace body 1, with a furnace cavity 2 provided inside the furnace body 1;

[0032] A furnace door 3, correspondingly arranged in front of the opening of the furnace body 1;

[0033] A sealing mechanism, arranged between the furnace door 3 and the furnace body 1;

[0034] The connecting mechanism is used to connect the furnace body 1 and the furnace door 3, and includes a two-piece connecting rod 4, two door connecting rods 5 and a hinge rod 6. One ends of the two-piece connecting rod 4 and the two door connecting rods 5 are both hinged to the hinge rod 6. The ends of the two-piece connecting rod 4 far from the hinge rod 6 are respectively hinged to the upper end and the lower end of the opening side of the furnace body 1, and the ends of the two door connecting rods 5 far from the hinge rod 6 are respectively hinged to the upper end and the lower end of the furnace door 3;

[0035] A plurality of buckles 7 are circumferentially and evenly arranged at the connection between the furnace body 1 and the furnace door 3.

[0036] The workpiece with heating is placed in the furnace cavity 2 of the furnace body 1. When the furnace door 3 and the furnace body 1 are in the open state, due to the lengths of the body connecting rod 4 and the door connecting rod 5, there is a certain distance between the furnace door 3 and the furnace body 1. The hinge rod 6 enables the furnace door 3 to rotate around the furnace body 1, which is convenient for putting in and taking out the workpiece in the furnace cavity 2; when closed, rotating the furnace door 3 can make the furnace door 3 face the opening of the furnace body 1. Push the furnace door 3 close to the furnace body 1, and then fasten the furnace door 3 and the furnace body 1 through the buckle 7. The buckle 7 applies the force of mutual buckling from multiple circumferential positions of the furnace door 3, and the force application is more uniform. And because the furnace door 3 can translate directly facing the furnace body 1 instead of rotating and buckling when the traditional furnace door 3 is buckled, it is not easy to be stuck or tilted, and can better squeeze the sealing mechanism, making the muffle furnace have better airtightness.

[0037] Furthermore, a controller is fixedly connected to the outer wall of the furnace body to control the heating temperature and time of the furnace body.

[0038] For a further optimized solution, the buckle 7 includes a hook 701 and a loop 702. The hook 701 is fixedly connected to the outer side wall of the furnace door 3, and the loop 702 is fixedly connected to the outer side wall of the furnace body 1 corresponding to the position of the hook 701 when the furnace body 1 and the furnace door 3 are buckled.

[0039] The loop 702 can hook the hook 701 and then pull the hook 701 to move towards the position close to the loop 702 to fasten the furnace door 3 and the furnace body 1;

[0040] Furthermore, the loop 702 can select common market models of the buckle 7 such as DK650-65-P, DK650-65-P-G, etc.

[0041] For a further optimized solution, the furnace body 1 includes a heating layer 101, a heat insulation layer 102 and a fixing layer 103. The heating layer 101, the heat insulation layer 102 and the fixing layer 103 are fixedly connected in sequence from the inside to the outside, and the furnace cavity 2 is arranged in the heating layer 101.

[0042] Heating wires and the like are arranged in the heating layer 101 for heating, the heat insulation layer 102 conducts heat insulation, and the fixing layer 103 is made of relatively strong steel plates, which can maintain the shape of the furnace body 1 and protect the internal heating layer 101 and heat insulation layer 102 of the furnace body 1.

[0043] For a further optimized solution, a number of overlapping strips 8 are arranged in pairs on both sides of the inner wall of the heating layer 101, and a shelf plate 9 is overlapped on the overlapping strip 8.

[0044] The shelf plate 9 can be overlapped on the overlapping strip 8 at an appropriate height to meet the placement requirements of workpieces of different heights. Setting multiple shelf plates 9 can also place multiple workpieces, improving space utilization.

[0045] For a further optimized solution, the sealing mechanism includes a sealing gasket 10 and a number of sealing rings 11; the sealing gasket 10 is fixedly connected to the position where the fixed layer 103 contacts the furnace door 3, and a number of sealing rings 11 are arranged in a loop shape and fixedly connected to the inner side of the furnace door 3. Sealing grooves 12 are provided on the heat preservation layer 102 corresponding to the sealing rings 11.

[0046] When buckling, the sealing rings 11 and the sealing grooves 12 are correspondingly fitted one by one. After the sealing rings 11 are extruded by the furnace door 3, the side seams of the sealing grooves 12 are filled, making the furnace cavity 2 airtight. The multiple layers of sealing rings 11 and sealing grooves 12 are arranged layer by layer to increase the airtightness; the sealing gasket 10 is also extruded to fill the gap at the position where the furnace door 3 contacts the furnace body 1, maintaining the airtightness.

[0047] For a further optimized solution, a protrusion 13 is prominently arranged at the center of the furnace door 3 corresponding to the furnace cavity 2.

[0048] The protrusion 13 corresponds to the furnace cavity 2, which is beneficial for corresponding guidance when the furnace door 3 and the furnace body 1 are buckled.

[0049] For a further optimized solution, a pressure valve 14 is fixedly installed at the top of the furnace body 1, and the pressure valve 14 communicates the furnace cavity 2 with the outside.

[0050] The gas in the furnace cavity 2 is heated, and the thermal expansion and contraction cause the air pressure in the furnace cavity 2 to increase. A large pressure difference is dangerous for explosion. Even if it does not explode, it is easy to push the furnace door 3 outwards, causing a gap between the furnace door 3 and the furnace body 1 and affecting the airtightness. Therefore, a pressure valve 14 needs to be set to ensure that the air pressure inside and outside the furnace body 1 is consistent.

[0051] For a further optimized solution, support legs 15 are fixedly connected to the four corners of the bottom of the furnace body 1, and the support legs 15 are telescopic.

[0052] The support legs 15 at the bottom of the furnace body 1 include sleeves and threaded rods. The telescoping of the support legs 15 can be realized by the rotation of the threads between the sleeves and the threaded rods, and the telescoping of the support legs 15 can adjust the furnace body 1 to be kept horizontal.

[0053] The details not elaborated in the present utility model are all well-known conventional technical means in the art.

[0054] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, 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 should not be construed as a limitation to the present utility model.

[0055] The embodiments described above are only for describing the preferred mode of the present utility model, and do not limit the scope of the present utility model. Without departing from the design spirit of the present utility model, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present utility model shall fall within the protection scope determined by the claims of the present utility model.

Claims

1. A high-sealing multi-functional muffle furnace, characterized in that, Including: A furnace body (1), within which a furnace chamber (2) is provided; A furnace door (3), correspondingly arranged in front of the opening of the furnace body (1); A sealing mechanism, arranged between the furnace door (3) and the furnace body (1); A connecting mechanism, used to connect the furnace body (1) and the furnace door (3), including two body connecting rods (4), two door connecting rods (5) and a hinge rod (6). One end of each of the two body connecting rods (4) and the two door connecting rods (5) is hinged to the hinge rod (6). The other ends of the two body connecting rods (4) away from the hinge rod (6) are respectively hinged to the upper and lower ends of the opening side of the furnace body (1). The other ends of the two door connecting rods (5) away from the hinge rod (6) are respectively hinged to the upper and lower ends of the furnace door (3); A plurality of buckles (7), circumferentially and evenly arranged at the joint of the furnace body (1) and the furnace door (3).

2. The high-sealing multifunctional muffle furnace according to claim 1, wherein: The buckle (7) includes a hook (701) and a buckle loop (702). The hook (701) is fixedly connected to the outer side wall of the furnace door (3), and the buckle loop (702) is fixedly connected to the outer side wall of the furnace body (1) corresponding to the position of the hook (701) when the furnace body (1) and the furnace door (3) are buckled.

3. The high-sealing multi-functional muffle furnace according to claim 1, characterized in that: The furnace body (1) includes a heating layer (101), a heat insulation layer (102) and a fixing layer (103). The heating layer (101), the heat insulation layer (102) and the fixing layer (103) are fixedly connected in sequence from the inside to the outside. The furnace chamber (2) is arranged within the heating layer (101).

4. The high-sealing multifunctional muffle furnace according to claim 3, wherein: On both sides of the inner wall of the heating layer (101), a plurality of overlapping strips (8) are arranged in pairs, and a shelf plate (9) is overlapped on the overlapping strips (8).

5. The high-sealing multifunctional muffle furnace according to claim 3, wherein: The sealing mechanism includes a sealing gasket (10) and a plurality of sealing rings (11); the sealing gasket (10) is fixedly connected to the position where the fixing layer (103) contacts the furnace door (3). The plurality of sealing rings (11) are arranged in a loop shape and are fixedly connected to the inner side of the furnace door (3). A sealing groove (12) is provided on the heat insulation layer (102) corresponding to the sealing rings (11).

6. The high-sealing multi-functional muffle furnace according to claim 1, wherein: A protrusion (13) protrudes from the center of the furnace door (3) corresponding to the furnace chamber (2).

7. The high-sealing multi-functional muffle furnace according to claim 1, characterized in that: A pressure valve (14) is fixedly installed at the top of the furnace body (1), and the pressure valve (14) communicates the furnace chamber (2) with the outside.

8. The high-sealing multifunctional muffle furnace according to claim 1, wherein: Support legs (15) are fixedly connected to the four corners of the bottom of the furnace body (1), and the support legs (15) are telescopic.

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