Sealing structure for wide-temperature-range low-vacuum-degree drying box

Abstract

A sealing structure for a wide-temperature-range low-vacuum-degree drying oven belongs to the technical field of drying oven sealing and comprises an oven body, an oven door, an inner container, an oven body sealing structure and an oven door sealing structure, the inner container is arranged in the oven body, the oven door is arranged on the opening side of the oven body, the oven door sealing structure is arranged on the inner side of the oven door, and the oven door sealing structure is arranged on the inner side of the oven door. A box body sealing structure is arranged on the contact face of the box body and the box door, and the box body sealing structure and the box door sealing structure are matched to form a sealing structure of the drying box. According to the box body sealing structure, the multi-layer outwards-extending square sealing structure is adopted, the contact area of the sealing face is increased, meanwhile, the sealing glue is adopted for conducting secondary sealing on the contact gap, and therefore the sealing performance of the box body sealing structure is guaranteed. In addition, the box door sealing structure is supported by rubber, and initial pre-tightening force can be provided when the box door is closed, so that the tempered glass is tightly attached to the outer sealing gasket, and the vacuum extraction efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the sealing technical field of drying box, specifically relates to a sealing structure for wide temperature range low vacuum degree drying box. BACKGROUND

[0002] Wide temperature range low vacuum degree drying box can keep high temperature and low vacuum degree in the working chamber for a long time when working, is specially designed for drying heat-sensitive, easily decomposable and easily oxidizable substances, and can rapidly dry and activate products, however, when the temperature of the working chamber is about 230 DEG C, the existing vacuum drying box sealing structure is difficult to keep the pressure in the working chamber below 4Pa for a long time, and cannot meet the needs of the activation of some products in production. SUMMARY

[0003] In view of the defects in the prior art, the utility model aims at providing a sealing structure for wide temperature range low vacuum degree drying box, which can meet the needs of the working temperature of 230 DEG C and the pressure in the working chamber below 4Pa.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a sealing structure for wide temperature range low vacuum degree drying box, which comprises a box body, a door, an inner container, a box body sealing structure and a door sealing structure, the box body is internally provided with the inner container, the opening side of the box body is provided with the door, the inner side of the door is provided with the door sealing structure, the contact surface of the box body and the door is provided with the box body sealing structure, and the box body sealing structure and the door sealing structure are matched to form the sealing structure of the drying box.

[0005] The box body sealing structure comprises an inner sealing gasket, a sealing flange and an outer sealing gasket, the inner sealing gasket is provided with a through hole, the sealing flange is provided with a counterbore, the counterbore and the through hole are matched, the sealing flange and the inner sealing gasket are fixed on the box body by using a countersunk screw, and the outer sealing gasket and the sealing flange and the inner sealing gasket are adhesively fixed by high-temperature-resistant sealing glue applied on the contact surface.

[0006] The door sealing structure comprises a door, rubber supports, tempered glass and a glass baffle, the middle part of the door is provided with an observation window, the inner side of the observation window is uniformly provided with rubber supports, the inner side of the rubber support is provided with tempered glass, the outer side of the tempered glass is in contact with the rubber support, the inner side of the tempered glass is in contact with the outer side of the outer sealing gasket, and the glass baffle is installed at the upper and lower ends of the inner side of the door and plays the roles of supporting and positioning the tempered glass.

[0007] The inner container is a rectangular structure with an opening at one end, is integrally formed by using a stainless steel plate, is arranged inside the box body, and the edge of the opening end of the inner container protrudes from the opening side of the box body to form a flange, the width of the flange is less than the sum of the thicknesses of the inner sealing gasket, the sealing flange and the outer sealing gasket.

[0008] The outer sealing gasket, the sealing flange and the inner sealing gasket are all square frame structures, the outer edge length is less than the length of the opening side of the box body, and the inner edge length is greater than the length of the opening end of the inner container.

[0009] The opening side surface of the box body is uniformly provided with threaded blind holes, the threaded blind holes are matched with the countersunk screws to fix the sealing flange and the inner sealing gasket on the opening side surface of the box body.

[0010] The outer sealing gasket and the inner sealing gasket are both thin-layer chromatography silica gel plates, the size of the outer sealing gasket is the same as that of the inner sealing gasket, the sealing flange is made of an aluminum alloy, the surface roughness of the contact surface of the sealing flange and the outer sealing gasket and the inner sealing gasket is less than or equal to 1.6, and the high-temperature-resistant sealing glue is a neutral single-component room-temperature curing silicone rubber.

[0011] The utility model discloses the beneficial effect is: adopt soft-hard-soft layered structure, connect the sealing plate directly with the box body, increase the contact area of the sealing surface, reduce the leakage, also reduce the roughness requirement when the box body outer wall and the inner container surface processing to reduce the production cost, in addition, adopt high-temperature-resistant sealing glue to fill the contact gap between the sealing structure, further enhance the sealing property, guarantee the pressure in the box body can maintain within 4Pa when the temperature in the working room of vacuum drying box is changed between room temperature to 230 DEG. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the explosion schematic drawing of the utility model.

[0013] Figure 2 It is the sealing structure schematic drawing of the utility model.

[0014] Figure 3 It is Figure 2 the A place local enlargement schematic drawing of.

[0015] Figure 4 It is the box door sealing structure schematic drawing.

[0016] Figure 5 It is the outer sealing gasket schematic drawing of the utility model.

[0017] Figure 6 It is the sealing flange schematic drawing of the utility model.

[0018] Figure 7 It is the inner sealing gasket schematic drawing of the utility model.

[0019] Figure 8 The figure shows the flange of the inner container.

[0020] In the figure: 1, box door, 2, rubber support, 3, toughened glass, 4, outer sealing gasket, 5, sealing flange, 501, counterbore, 6, box, 601, threaded blind hole, 7, countersunk screw, 8, inner sealing gasket, 801, through hole, 9, inner container, 901, flange, 10, glass baffle. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described clearly and completely in combination with the drawings of the utility model, and it should be noted that the described embodiments are only some of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figures 1-8A sealing structure for a wide temperature range low vacuum drying oven, comprising a box body 6, a box door 1, an inner container 9, a box body sealing structure and a box door sealing structure, the inside of the box body 6 is provided with the inner container 9, the opening side of the box body 6 is provided with the box door 1, the inside of the box door 1 is provided with the box door sealing structure, the contact surface of the box body 6 and the box door 1 is provided with the box body sealing structure, and the box body sealing structure and the box door sealing structure cooperate to form the sealing structure of the drying oven. The box body sealing structure comprises an inner sealing gasket 8, a sealing flange 5 and an outer sealing gasket 4, the inner sealing gasket 8 is provided with a through hole 801, the sealing flange 5 is provided with a counterbore 501, the counterbore 501 and the through hole 801 cooperate, and the sealing flange 5 and the inner sealing gasket 8 are fixed on the box body 6 by using the countersunk screw 7, and the outer sealing gasket 4 and the sealing flange 5 and the inner sealing gasket 8 are bonded and fixed by applying high-temperature-resistant sealing glue on the contact surface. The box door sealing structure comprises the box door 1, rubber supports 2, tempered glass 3 and glass baffles 10, the middle part of the box door 1 is provided with an observation window, the inside of the observation window is uniformly provided with the rubber supports 2, the inside of the rubber supports 2 is provided with the tempered glass 3, the outside of the tempered glass 3 is in contact with the rubber supports 2, and the inside is in contact with the outside of the outer sealing gasket 4, and the glass baffles 10 are installed at the upper and lower ends of the inside of the box door 1 and play the roles of supporting and positioning the tempered glass 3. The inner container 9 is a rectangular structure with an opening at one end and is integrally formed by using a stainless steel plate, the inner container 9 is arranged in the inside of the box body 6, the edge of the opening end of the inner container 9 protrudes out of the opening side of the box body 6 to form a flange 901, and the width of the flange 901 is less than the sum of the thicknesses of the inner sealing gasket 8, the sealing flange 5 and the outer sealing gasket 4. The outer sealing gasket 4, the sealing flange 5 and the inner sealing gasket 8 are all square frame structures, the outer edge length thereof is less than the length of the opening side of the box body 6, and the inner edge length thereof is greater than the length of the opening end of the inner container 9. The opening side surface of the box body 6 is uniformly provided with threaded blind holes 601, the threaded blind holes 601 cooperate with the countersunk screws 7 to fix the sealing flange 5 and the inner sealing gasket 8 on the opening side surface of the box body 6. The outer sealing gasket 4 and the inner sealing gasket 8 are both thin-layer chromatography silica gel plates, the size of the outer sealing gasket 4 is the same as that of the inner sealing gasket 8, the sealing flange 5 is made of aluminum alloy, the surface roughness of the contact surfaces of the sealing flange 5, the outer sealing gasket 4 and the inner sealing gasket 8 is less than or equal to 1.6, and the high-temperature-resistant sealing glue is neutral single-component room temperature curing silicone rubber.

[0023] The sealing structure of the utility model in use:

[0024] The observation window is arranged on the box door 1, which is convenient for observing the condition in the box body 6 and reading the temperature meter, the rubber support 2 is connected with the box door 1 in a bonding mode, and is evenly distributed along the periphery of the observation window, when the box door 1 is closed, the rubber support 2 is compressed to generate deformation, thereby generating the pre-tightening force which is compressed and evenly distributed to the tempered glass 3, so that the tempered glass 3 is more closely attached to the outer sealing gasket 4, the glass baffle 10 is arranged on the upper and lower sides of the box door 1, which plays a positioning role on the tempered glass 3, and guarantees the attachment of the tempered glass 3 to the rubber support 2, and prevents the overturning and movement of the tempered glass 3;

[0025] The sealing flange 5 is made of aluminum alloy plate, in order to reduce the leakage amount at high temperature, the surface roughness of the contact surface of the sealing flange 5 with the outer sealing gasket 4 and the inner sealing gasket 8 is less than or equal to 1.6, the size is consistent with the size of the inner sealing gasket 8 and the outer sealing gasket 4, the surface of the side of the box body 6 with the flange 901 is processed with the threaded blind hole 601, when installation, the sealing flange 5 and the inner sealing gasket 8 are connected with the box body 6 through the countersunk screw 7, then, a layer of neutral single-component room temperature curing silicone rubber is coated on the contact surface of the sealing flange 5 and the outer sealing gasket 4, then, the outer sealing gasket 4 is aligned with the sealing flange 5 and pressed together and left for 24 hours to solidify the adhesive, then, the neutral single-component room temperature curing silicone rubber is used to fill and block the gap between the outer sealing gasket 4, the sealing flange 5, the inner sealing gasket 8 and the inner container 9, and left for 24 hours to solidify.

[0026] The above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc.

[0027] The part not described in the present application is the prior art.

Claims

1. A sealing structure for a wide-temperature-range low-vacuum drying oven, comprising an oven body (6), an oven door (1), an inner container (9), an oven body sealing structure and an oven door sealing structure, characterized in that: The box (6) is internally provided with an inner container (9), the opening side of the box (6) is provided with a box door (1), the inner side of the box door (1) is provided with a box door sealing structure, the contact surface of the box (6) and the box door (1) is provided with a box sealing structure, and the box sealing structure and the box door sealing structure cooperatively form the sealing structure of the drying box as a whole.

2. The sealing structure for the wide temperature range low vacuum degree drying oven according to claim 1, characterized in that: The box sealing structure comprises an inner sealing gasket (8), a sealing flange (5) and an outer sealing gasket (4), the inner sealing gasket (8) is provided with a through hole (801), the sealing flange (5) is provided with a counterbore (501), the counterbore (501) and the through hole (801) are matched, the sealing flange (5) and the inner sealing gasket (8) are fixed on the box (6) by using a countersunk screw (7), and the outer sealing gasket (4) and the sealing flange (5) and the inner sealing gasket (8) are adhesively fixed by applying a high-temperature-resistant sealing glue on the contact surface.

3. The sealing structure for the wide temperature range low vacuum degree drying oven according to claim 1, characterized in that: The box door sealing structure comprises the box door (1), rubber supports (2), tempered glass (3) and glass baffles (10), the middle part of the box door (1) is provided with an observation window, the inner side of the observation window is uniformly provided with the rubber supports (2), the inner side of the rubber support (2) is provided with the tempered glass (3), the outer side of the tempered glass (3) is in contact with the rubber support (2), and the inner side of the tempered glass (3) is in contact with the outer side of the outer sealing gasket (4), and the glass baffles (10) are installed at the upper and lower ends of the inner side of the box door (1) and play a supporting and positioning role on the tempered glass (3).

4. The sealing structure for the wide temperature range low vacuum degree drying oven according to claim 2, characterized in that: The inner container (9) is a rectangular structure with an opening at one end, is integrally formed by using a stainless steel plate, is arranged in the interior of the box (6), and the edge of the opening end of the inner container (9) protrudes from the opening side of the box (6) to form a flange (901), and the width of the flange (901) is less than the sum of the thicknesses of the inner sealing gasket (8), the sealing flange (5) and the outer sealing gasket (4).

5. The sealing structure for the wide temperature range low vacuum degree drying oven according to claim 2, characterized in that: The outer sealing gasket (4), the sealing flange (5) and the inner sealing gasket (8) are all square frame structures, the outer edge length thereof is less than the length of the opening side of the box (6), and the inner edge length thereof is greater than the length of the opening end of the inner container (9).

6. The sealing structure for the wide temperature range low vacuum degree drying oven according to claim 2, characterized in that: The opening side surface of the box (6) is uniformly provided with threaded blind holes (601), the threaded blind holes (601) are matched with the countersunk screws (7) to fix the sealing flange (5) and the inner sealing gasket (8) on the opening side surface of the box (6).

7. The sealing structure for the wide temperature range low vacuum degree drying oven according to claim 2, characterized in that: The outer sealing gasket (4) and the inner sealing gasket (8) are both thin-layer chromatography silica gel plates, the size of the outer sealing gasket (4) is the same as that of the inner sealing gasket (8), the sealing flange (5) is made of an aluminum alloy, the surface roughness of the contact surfaces of the sealing flange (5) and the outer sealing gasket (4) and the inner sealing gasket (8) is less than or equal to 1.6, and the high-temperature-resistant sealing glue is a neutral single-component room-temperature curing silicone rubber.

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