Automatic sealing type positive and negative pressure drying oven

Abstract

The utility model discloses an automatic sealing type positive and negative pressure drying oven which comprises an oven body and a drying oven body, the drying oven body comprises a cylinder and an end cover, the cylinder is fixedly connected with a fixing support, a front end plate is arranged on the fixing support, the end cover comprises a rotating arm rotatably arranged on the front end plate and an end cover body rotatably arranged on the rotating arm, and the end cover body is fixedly connected with the cylinder. A feeding hole is formed in the cylinder body, a limiting part is arranged in front of the feeding hole in the cylinder body, an abutting part which can be staggered with or aligned to the limiting part is arranged on the end cover body, an annular groove is formed in the front end face of the cylinder body around the feeding hole, a sealing strip with an annular cavity is arranged in the annular groove, and a gas inlet and a gas outlet for nitrogen to enter and exit are formed in the sealing strip. The sealing strip can be tightly attached to the end cover body after being filled with nitrogen, the sealing strip can completely retract into the annular groove after being exhausted, reliable sealing is achieved, meanwhile, a user can close the end cover conveniently, meanwhile, abrasion caused by the fact that the sealing strip protrudes out of the cylinder is reduced, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure ovens, in particular to an automatic sealing positive and negative pressure oven. Background Art

[0002] The pressure oven can be used under positive or negative pressure conditions, and the pressure range is 50torr~10kg / cm 2 , widely used in chip placement and glue filling processes to eliminate bubbles and increase adhesion.

[0003] At present, the structure of a pressure oven generally includes a cylinder and an end cover. The end cover is installed at the open end of the cylinder. In order to ensure that the inside of the cylinder remains sealed when the pressure oven is working, a sealing structure needs to be provided at the connection between the cylinder and the end cover. Generally, the most common sealing structure is a sealing strip, which is made of silicone or rubber material. It is usually fixedly mounted on the cylinder and arranged around the opening of the cylinder. When the end cover is closed, the sealing strip is squeezed by the end cover and deformed, thereby ensuring the seal. In actual operation, the user needs to close the end cover with force to deform the sealing strip, which is extremely inconvenient to operate. At the same time, the sealing strip protrudes from the side wall of the cylinder with an opening. When the end cover is in the open state, the protruding sealing strip is easy to contact and rub against other objects, resulting in serious wear of the sealing strip, which greatly reduces the service life of the sealing strip. Utility Model Content

[0004] The technical problem to be solved by the present invention is that in the prior art, the sealing strip at the end cover of the oven is easily worn and it is inconvenient to close the end cover. Based on this, the present invention provides an automatic sealing positive and negative pressure oven which can reduce the wear of the sealing strip and is easy to operate.

[0005] The technical solution adopted by the utility model to solve its technical problems is: an automatic sealing positive and negative pressure oven, comprising a box body with a fixed bracket inside and an oven body arranged in the box body, the oven body comprising a cylinder and an end cover, the cylinder being fixedly connected to the fixed bracket, the fixed bracket being provided with a front end plate, the end cover comprising a rotating arm rotatably arranged on the front end plate and an end cover body rotatably arranged on the rotating arm, the cylinder having a feed opening, the cylinder being provided with a limiting portion located in front of the feed opening, the end cover body being provided with a supporting portion that can be staggered or aligned with the limiting portion, an annular groove being provided around the feed opening on the front end surface of the cylinder, a sealing strip with an annular cavity being provided in the annular groove, the sealing strip being provided with an air inlet and an exhaust port for nitrogen gas to enter and exit, the sealing strip being able to adhere to the end cover body after being filled with nitrogen, and being able to be completely retracted into the annular groove after being exhausted.

[0006] Furthermore, the air inlet is connected to a nitrogen storage tank via a first pipeline, the first pipeline is provided with a control valve, and the exhaust port is connected to a second pipeline with an exhaust valve.

[0007] Furthermore, a side of the sealing strip away from the end cover body is fixedly connected to the groove wall of the annular groove.

[0008] Furthermore, the sealing strip is made of silicone or rubber material.

[0009] Furthermore, a cylinder is provided between the end cover body and the rotating arm, a cylinder body of the cylinder is rotatably connected to the rotating arm, and an extended end of the cylinder is rotatably connected to the end cover body.

[0010] Furthermore, the rotating arm is rotatably mounted on the front end plate via a rotating shaft, the rotating arm is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the front end plate, and a motor for driving the rotating shaft to rotate is mounted on the front end plate.

[0011] Furthermore, the limiting portion is formed to protrude inwardly along the radial direction of the cylinder, and the supporting portion is formed to protrude outwardly along the radial direction of the end cover body.

[0012] Furthermore, a box door is installed on the box body corresponding to the end cover, and the box door is movable relative to the box body. The movable box door can expose the end cover or cover the end cover in the box body.

[0013] The utility model has the following beneficial effects:

[0014] 1. The automatic sealing positive and negative pressure oven of the utility model discharges the nitrogen in the annular cavity of the sealing strip when the end cover is closed. The sealing strip is completely accommodated in the annular groove in its natural state. The sealing strip does not protrude from the front end surface of the cylinder, thus avoiding contact and friction with other objects, preventing serious wear of the sealing strip and extending the service life of the sealing strip.

[0015] 2. The sealing strip is accommodated in the annular groove. There is no need to squeeze the sealing strip when installing the end cover body. After the sealing strip is moved into place, nitrogen is injected into the annular cavity to expand the sealing strip, thereby tightly pressing against the end cover body. This can achieve a sealing effect between the end cover body and the cylinder body, and the sealing reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 It is a three-dimensional diagram of the automatic sealing positive and negative pressure oven of the utility model;

[0018] Figure 2 yes Figure 1 Another perspective view of the automatic sealing positive and negative pressure oven shown (omitted the oven door);

[0019] Figure 3 yes Figure 1 A partially exploded view of the automatic sealing positive and negative pressure oven shown;

[0020] Figure 4 yes Figure 3 The front view of the baking body in the automatic sealing positive and negative pressure oven shown;

[0021] Figure 5 yes Figure 4 An exploded view of the baking body shown;

[0022] Figure 6 yes Figure 4 A cross-sectional view of the baking body along AA is shown;

[0023] Figure 7 yes Figure 6 A partial enlarged view of point B in the baking body shown;

[0024] Figure 8 This is a simplified diagram of the air path control of the sealing strip in the utility model.

[0025] In the figure: 10, box body, 101, fixed bracket, 102, front end plate, 103, motor, 11, box door, 20, baking body, 21, cylinder, 210, feed port, 201, limit part, 211, annular groove, 212, sealing strip, 2121, annular cavity, 22, end cover, 221, rotating arm, 2211, rotating shaft, 222, end cover body, 2221, supporting part, 223, cylinder, 3, first pipeline, 31, control valve, 4, nitrogen storage tank, 5, second pipeline, 51, exhaust valve. DETAILED DESCRIPTION

[0026] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0027] See also Figure 1-5The utility model provides an automatic sealing positive and negative pressure oven, comprising a box body 10 and an oven body 20 installed in the box body 10, a fixed bracket 101 is provided in the box body 10, the oven body 20 comprises a cylinder 21 and an end cover 22, wherein the cylinder 21 is fixedly connected to the fixed bracket 101, the end cover 22 is rotatably mounted on the fixed bracket 101, and a feed port 210 for feeding chips into the cylinder 21 is provided on the front end surface of the cylinder 21. Rotating the oven body 20 can move the end cover 22 away from the cylinder 21 to open the feed port 210, or move the end cover 22 close to the cylinder 21 to close the feed port 210.

[0028] In this embodiment, a front end plate 102 is fixedly mounted on the fixed bracket 101, and the end cover 22 includes a rotating arm 221 and an end cover body 222. The rotating arm 221 is rotatably connected to the front end plate 102, and the end cover body 222 is mounted on the rotating arm 221. During operation, the rotating arm 221 is rotated relative to the front end plate 102 to drive the end cover body 222 to move, thereby causing the end cover body 222 to open or close the feed port 210.

[0029] As a preferred embodiment, a limiting portion 201 is provided on the cylinder 21 in front of the feed port 210 and protrudes radially inward along the cylinder 21, and a supporting portion 2221 is provided on the edge of the end cover body 222 and protrudes radially outward along the end cover body 222, and the center of the end cover body 222 is rotatably mounted on the rotating arm 221. During use, the end cover body 222 is rotated relative to the rotating arm 221, so that the supporting portion 2221 and the limiting portion 201 are staggered or aligned. When the supporting portion 2221 and the limiting portion 201 are staggered, rotating the rotating arm 221 can drive the supporting portion 2221 to pass through the limiting portion 201, so that the end cover body 222 closes the feed port 210. Then, rotating the end cover body 222 can drive the supporting portion 2221 to move to the rear of the limiting portion 201. At this time, the limiting portion 201 and the supporting portion 2221 are at least partially opposite to each other, and the limiting portion 201 can effectively limit the outward movement of the supporting portion 2221, thereby limiting the end cover body 222. When the feed port 210 needs to be opened, the end cover body 222 needs to be rotated first to offset the abutting portion 2221 from the limiting portion 201 . Only then can the end cover body 222 be moved away by rotating the rotating arm 221 to open the feed port 210 .

[0030] To facilitate the rotation of the end cap body 222, a cylinder 223 is provided between the end cap body 222 and the rotating arm 221. The cylinder body of the cylinder 223 is rotatably connected to the rotating arm 221, and the extended end of the cylinder 223 is rotatably connected to the end cap body 222. When the end cap body 222 needs to be rotated, the cylinder 223 can be driven to rotate by simply activating the cylinder 223.

[0031] In addition, the motor 103 is fixedly mounted on the front end plate 102, and the rotating arm 221 is rotatably mounted on the front end plate 102 via a rotating shaft 2211. Specifically, the rotating arm 221 is fixedly connected to the rotating shaft 2211, which is rotatably connected to the front end plate 102, and the output shaft of the motor 103 is fixedly connected to the rotating shaft 2211. During use, by starting the motor 103, the rotating arm 221 and the end cover body 222 thereon are driven to move.

[0032] See also Figure 6 、 Figure 7 In this embodiment, an annular groove 211 is provided on the front end surface of the cylinder 21, located on the periphery of the feed port 210, and a sealing strip 212 is installed in the annular groove 211. An annular cavity 2121 is provided in the sealing strip 212, and an air inlet (not shown in the figure) and an exhaust port (not shown in the figure) are provided on the sealing strip 212, both of which are connected to the annular cavity 2121. The air inlet is used to fill nitrogen into the annular cavity 2121, and the exhaust port is used to discharge the nitrogen in the annular cavity 2121.

[0033] When the cam 221 is closed, the cam 222 is in a closed position and the cam 222 is in a closed position. The sealing strip 212 is made of silicone or rubber.

[0034] It can be understood that the sealing strip 212 pushes the end cover body 222 tightly against the limiting portion 201, thereby preventing the end cover body 222 from rotating easily, thereby further improving the sealing reliability.

[0035] When the end cover 22 needs to be opened, the user opens the exhaust port, and the nitrogen in the annular cavity 2121 will flow out through the exhaust port. At this time, the sealing strip 212 shrinks and resets under the action of its own elastic force, and finally shrinks completely into the annular groove 211. The squeezing force of the sealing strip 212 on the end cover body 222 is released. At this time, the end cover body 222 can rotate relative to the rotating arm 221, and finally the end cover body 222 is moved away from the feed port 210 by rotating the rotating arm 221.

[0036] In addition, in order to prevent the sealing strip 212 from separating from the annular groove 211, the side of the sealing strip 212 away from the end cover body 222 is fixedly connected to the groove wall of the annular groove 211. Preferably, the sealing strip 212 and the annular groove 211 are fixedly connected by gluing.

[0037] See also Figure 8 As a specific embodiment, the air inlet is connected to the nitrogen storage tank 4 through a first pipe 3, a control valve 31 is installed on the first pipe 3, the exhaust port is connected to a second pipe 5, one end of the second pipe 5 extends to the outside of the oven, and an exhaust valve 51 is installed on the second pipe 5. The control valve 31 is used to control the on and off of nitrogen in the first pipe 3. When the exhaust valve 51 is closed, the nitrogen in the annular cavity 2121 cannot be discharged through the second pipe 5; when the exhaust valve 51 is opened, the nitrogen in the annular cavity 2121 can be discharged to the outside of the oven through the second pipe 5.

[0038] In this embodiment, a door 11 is mounted on the housing 10 corresponding to the end cap 22. The door 11 is movable relative to the housing 10. When the door 11 is movable, the end cap 22 can be exposed or concealed within the housing 10. When the end cap 22 is exposed, the operator can open the end cap 22 to insert or remove chips. The connection between the door 11 and the housing 10 can be a rotating connection or a sliding connection. The operator can operate the movable door 11 by flipping or sliding, which is not limited here.

[0039] In the automatic sealing positive and negative pressure oven of the present invention, when the end cover 22 is closed, the nitrogen in the annular cavity 2121 of the sealing strip 212 is first discharged. The sealing strip 212 in its natural state is completely contained within the annular groove 211. The sealing strip 212 does not protrude from the front end surface of the cylinder 21, thereby avoiding contact and friction with other objects, preventing severe wear of the sealing strip 212, and extending the service life of the sealing strip 212. At the same time, the sealing strip 212 is contained within the annular groove 211. When installing the end cover body 222, there is no need to forcefully squeeze the sealing strip 212. After the sealing strip 212 is moved into place, nitrogen is injected into the annular cavity 2121 to expand the sealing strip 212, thereby tightly contacting the end cover body 222, thereby achieving a seal between the end cover body 222 and the cylinder 21, and achieving high sealing reliability.

[0040] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An automatic sealing positive and negative pressure oven, comprising a box body with a fixed bracket inside and an oven body disposed within the box body, the oven body comprising a cylinder and an end cover, the cylinder being fixedly connected to the fixed bracket, characterized in that: A front end plate is provided on the fixed bracket, and the end cover includes a rotating arm rotatably provided on the front end plate and an end cover body rotatably provided on the rotating arm. A feed port is provided on the cylinder, and a limiting portion is provided on the cylinder in front of the feed port. A supporting portion that can be staggered or aligned with the limiting portion is provided on the end cover body. An annular groove is provided around the feed port on the front end surface of the cylinder, and a sealing strip with an annular cavity is provided in the annular groove. An air inlet and an exhaust port for nitrogen gas are provided on the sealing strip. After the sealing strip is filled with nitrogen, it can be tightly attached to the end cover body, and after the sealing strip is exhausted, it can be completely retracted into the annular groove.

2. The automatic sealing positive and negative pressure oven according to claim 1, characterized in that: The air inlet is connected to the nitrogen storage tank through a first pipeline, the first pipeline is provided with a control valve, and the exhaust port is connected to a second pipeline with an exhaust valve.

3. The automatic sealing positive and negative pressure oven according to claim 1 or 2, characterized in that: A side of the sealing strip away from the end cover body is fixedly connected to the groove wall of the annular groove.

4. The automatic sealing positive and negative pressure oven according to claim 1 or 2, characterized in that: The sealing strip is made of silica gel or rubber material.

5. The automatic sealing positive and negative pressure oven according to claim 1, characterized in that: A cylinder is provided between the end cover body and the rotating arm. The cylinder body of the cylinder is rotatably connected to the rotating arm, and the protruding end of the cylinder is rotatably connected to the end cover body.

6. The automatic sealing positive and negative pressure oven according to claim 5, characterized in that: The rotating arm is rotatably mounted on the front end plate via a rotating shaft, the rotating arm is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the front end plate, and a motor for driving the rotating shaft to rotate is mounted on the front end plate.

7. The automatic sealing positive and negative pressure oven according to claim 1, characterized in that: The limiting portion is formed to protrude inwardly along the radial direction of the cylinder, and the supporting portion is formed to protrude outwardly along the radial direction of the end cover body.

8. The automatic sealing positive and negative pressure oven according to claim 1, characterized in that: A box door is installed on the box body corresponding to the end cover, and the box door is movable relative to the box body. The end cover can be exposed or covered in the box body by moving the box door.

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