Constant-temperature and constant-pressure device of positive and negative pressure drying oven

Abstract

The utility model relates to the technical field of pressure drying ovens, in particular to a constant-temperature and constant-pressure device of a positive and negative pressure drying oven, which is used for being installed on the pressure drying oven, the pressure drying oven comprises a pressurizing assembly and a heating assembly, the heating assembly comprises a heating inner shell and a heating outer shell, and the heating outer shell wraps the heating inner shell. The heating inner shell is of a hollow shell-shaped structure, a heating cavity is formed between the heating inner shell and the heating outer shell, and a heating pipe is arranged in the heating cavity; the heating assembly further comprises a plurality of supports, the supports are evenly arranged and arranged in the heating cavity, the supports are detachably connected to the heating inner shell, and the heating pipes are installed in the supports. The pressurizing assembly comprises a pressurizing cylinder and a pipe set, one end of the pipe set is communicated into the heating cavity, and the other end of the pipe set is communicated with the pressurizing cylinder. The pressure drying oven comprises the constant-temperature and constant-pressure device for the positive pressure drying oven and the negative pressure drying oven.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure ovens, in particular to a positive and negative pressure oven constant temperature and pressure device. Background Art

[0002] Positive and negative pressure oven is a kind of heat treatment equipment used in laboratory and industrial applications. It can be used for baking, drying, curing, heat treatment and other materials and samples. It uses a constant temperature and pressure device to control the temperature and pressure of the internal environment and can be used under positive and negative pressure conditions of the cavity pressure. The use pressure range is 50-10 kg per square centimeter, which can be applied to chip mounting and glue filling processes. Usually, positive and negative pressure ovens use positive and negative pressure to circulate pressure under heating conditions to discharge bubbles in the product glue. The constant temperature and pressure device can be used to keep the temperature and pressure in the box stable. By controlling the heating element and the exhaust and air intake system, it can adjust and maintain the temperature and pressure inside the oven within the preset range to achieve precise control and heat treatment of the sample. However, the existing vacuum oven and nitrogen oven cannot apply a positive pressure of 10 kg per square centimeter, so the bubble discharge effect in the product glue is not ideal.

[0003] In order to solve the above technical problems, Chinese patent CN206469598U discloses a constant temperature and constant pressure hot air circulation oven, including a box body, a heating pipe is installed in the box body, a hot air circulation fan is installed on the side wall of the box body, a control panel is installed outside the box body, and one or more exhaust ducts are connected to the rear side of the box body, a manual valve and an electronic valve are installed on the exhaust duct, a relay is installed in the control panel, and the electronic valve is connected to the relay through a control line. The constant temperature and constant pressure hot air circulation oven disclosed in the above patent has multiple exhaust ducts and electronic valves for real-time monitoring of the pressure in the oven and pressure relief when the pressure is too high, so as to ensure the constant pressure and temperature in the oven, but for nitrogen ovens, the above patent cannot achieve nitrogen pressurization, and thus cannot reach a positive pressure of 10 kilograms per square centimeter.

[0004] Therefore, it is necessary for technicians in this field to provide a positive and negative pressure oven constant temperature and pressure device, and to increase the pressure application capacity of the oven by adding nitrogen boosting equipment to ensure the stability and effect of use. Utility Model Content

[0005] The utility model aims to provide a positive and negative pressure oven constant temperature and pressure device to solve the technical problem that the vacuum oven and the nitrogen oven in the prior art cannot apply a positive pressure of 10 kilograms per square centimeter, and therefore, the bubble discharge effect in the product glue is not ideal.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a positive and negative pressure oven constant temperature and pressure device, which is used to be installed on a pressure oven, the pressure oven comprises a pressurizing component and a heating component, the heating component comprises a heating inner shell and a heating outer shell, the heating outer shell wraps the heating inner shell, the heating inner shell is a shell-like structure with a hollow interior, a heating cavity is provided between the heating inner shell and the heating outer shell, a heating tube is provided in the heating cavity; the heating component also comprises a bracket, a plurality of brackets are provided and evenly arranged, a plurality of brackets are arranged in the heating cavity, the brackets are detachably connected to the heating inner shell, and the heating tube is installed in the bracket; the pressurizing component comprises a booster cylinder and a pipe group, one end of the pipe group is connected to the heating cavity, and the other end of the pipe group is connected to the booster cylinder.

[0007] Furthermore, the bracket includes a lower bracket and an upper bracket, the lower bracket is installed at the end of the heating inner shell, and the upper bracket is installed on the lower bracket, and a gap is left between the upper bracket and the lower bracket.

[0008] Furthermore, the heating tube is installed in the gap between the lower bracket and the upper bracket.

[0009] Furthermore, high-temperature steam flows through the heating tube.

[0010] Furthermore, the heating component also includes a hot air circulation motor, which is installed outside the heating shell. The rotating shaft of the hot air circulation motor passes through the wall of the heating shell and extends into the heating cavity.

[0011] Furthermore, the heating cavity is communicated with the inner cavity of the heating inner shell.

[0012] Furthermore, a blade is provided on the rotating shaft of the hot air circulation motor.

[0013] Furthermore, the heating shell is in a sealed state.

[0014] A pressure oven comprises any one of the positive and negative pressure oven constant temperature and pressure devices described above.

[0015] Furthermore, the pressure oven also includes a vacuum pumping component and a water cooling component. The vacuum pumping component is connected to the heating cavity, and the water cooling component is connected to the vacuum pumping component.

[0016] The beneficial effects of the utility model are as follows: the utility model increases the internal pressure of the equipment by pressurizing with nitrogen, ensures the sufficiency and stability of the bubble extrusion of the workpiece, and makes up for the technical problem that the pressure of the common pressure oven for vacuuming is limited and the positive pressure of kilograms per square centimeter cannot be stably reached; at the same time, the utility model arranges a bracket inside the equipment, and the heating tube is stably installed in the heating cavity through the bracket to prevent the heating tube from touching the heating inner shell or the heating outer shell, thereby ensuring the stability of the use of the utility model and ensuring constant temperature and pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the positive and negative pressure oven constant temperature and pressure device of the utility model (part of the outer shell is omitted).

[0018] Figure 2 It is a cross-sectional view of the positive and negative pressure oven constant temperature and pressure device of the utility model.

[0019] Figure 3 It is a cross-sectional view of the positive and negative pressure oven constant temperature and pressure device of the utility model (the outer shell is omitted).

[0020] Figure 4 yes Figure 3 Top view of the .

[0021] Figure 5 yes Figure 4 Sectional view along AA (isometric state).

[0022] Figure 6 The utility model is an exploded schematic diagram of a heating component in a positive and negative pressure oven constant temperature and pressure device.

[0023] Figure 7 yes Figure 6 A partial enlarged schematic diagram of area A in the middle.

[0024] The components in the accompanying drawings are marked as follows: 10, vacuum assembly; 20, pressurizing assembly; 21, booster cylinder; 30, heating assembly; 31, heating inner shell; 32, heating outer shell; 33, heating cavity; 34, heating tube; 35, hot air circulation motor; 36, bracket; 361, lower bracket; 362, upper bracket; 40, water cooling assembly. DETAILED DESCRIPTION

[0025] Now the utility model is described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the utility model in a schematic manner, so it only shows the components related to the utility model.

[0026] See also Figure 1 , Figure 2 The utility model provides a positive and negative pressure oven constant temperature and pressure device, which is used to be installed on a pressure oven, and the pressure oven includes a shell (not shown in the figure), and a vacuum assembly 10, a pressurizing assembly 20, a heating assembly 30 and a water cooling assembly 40 located in the shell. The vacuum assembly 10 is used to vacuum the pressure oven, the pressurizing assembly 20 and the heating assembly 30 are used to pressurize and heat the pressure oven, and the water cooling assembly 40 is used to cool the pressure oven and the vacuum assembly 10.

[0027] Furthermore, the heating assembly 30 includes a heating inner shell 31 and a heating outer shell 32, the heating outer shell 32 wraps the heating inner shell 31, the heating outer shell 32 is in a sealed state, the heating inner shell 31 is a shell-like structure with a hollow interior, a heating cavity 33 is provided between the heating inner shell 31 and the heating outer shell 32, the heating cavity 33 is connected to the internal cavity of the heating inner shell 31, and a heating pipe 34 is provided in the heating cavity 33. In this embodiment, high-temperature steam is passed through the heating pipe 34 to heat the heating pipe 34, thereby heating the heating cavity 33.

[0028] For further information, see Figure 3 , Figure 4 The pressurizing assembly 20 includes a pressurizing cylinder 21 and a pipe group (not shown), one end of the pipe group is connected to the heating cavity 33, and the other end of the pipe group is connected to the pressurizing cylinder 21. When in use, nitrogen is passed into the heating cavity 33 through the pressurizing cylinder 21 to achieve pressurization.

[0029] When in use, the vacuum assembly 10 is connected to the heating cavity 33, and the water cooling assembly 40 is connected to the vacuum assembly 10; the workpiece is placed in the heating inner shell 31, and the heating cavity 33 is heated by the heating tube 34, thereby heating the workpiece, and then the vacuum assembly 10 is used to vacuum the internal cavity of the heating inner shell 31, and negative pressure and positive pressure are circulated in the heating environment to discharge the bubbles in the glue of the workpiece, and finally the booster cylinder 21 is used to increase the pressure delivery to ensure the efficiency of bubble discharge.

[0030] It can be understood that the pressure oven includes a vacuum assembly 10, a pressurizing assembly 20, a heating assembly 30 and a water cooling assembly 40. The processes of positive and negative ovens generally include several main steps such as vacuuming, heating, pressurizing and degassing. In this process, the environment in the oven is evacuated to a vacuum state, and then the heating assembly 30 heats the oven to expand the gas inside the object, thereby achieving the discharge of bubbles. Since the vacuum pressure of a common pressure oven is limited and it is impossible to stably reach a positive pressure of 10 kilograms per square centimeter, the utility model increases the internal pressure by pressurizing with nitrogen gas to further squeeze out the remaining bubbles.

[0031] For further information, see Figure 5 , Figure 6 , Figure 7 The heating assembly 30 also includes a bracket 36, which is provided with multiple and evenly arranged brackets 36. The multiple brackets 36 are arranged in the heating cavity 33. The brackets 36 are detachably connected to the heating inner shell 31 using fasteners such as bolts or screws, and the heating tube 34 is installed in the brackets 36.

[0032] Specifically, the bracket 36 includes a lower bracket 361 and an upper bracket 362, the lower bracket 361 is mounted on the end of the heating inner shell 31, the upper bracket 362 is mounted on the lower bracket 361, a gap is left between the upper bracket 362 and the lower bracket 361, and the heating tube 34 is mounted in the gap between the lower bracket 361 and the upper bracket 362. The utility model stably mounts the heating tube 34 in the heating cavity 33 through the bracket 36, prevents the heating tube 34 from touching the heating inner shell 31 or the heating outer shell 32, and ensures the stability of the utility model.

[0033] Furthermore, the heating assembly 30 further includes a hot air circulation motor 35, which is mounted outside the heating housing 32, and a rotating shaft of the hot air circulation motor 35 penetrates the wall of the heating housing 32 and extends into the heating cavity 33. A paddle (not shown) is provided on the rotating shaft of the hot air circulation motor 35, and when in use, the hot air circulation motor 35 is driven, and the paddle rotates in the heating cavity 33, thereby realizing hot air circulation, making the internal temperature of the utility model more uniform and stable, and ensuring the stability of workpiece heating.

[0034] The specific operation method of the utility model is: placing the workpiece in the heating inner shell 31, using the heating tube 34 to heat the heating cavity 33, and then using the vacuum assembly 10 to vacuum the internal cavity of the heating inner shell 31, and finally using the booster cylinder 21 to increase the pressure and complete the bubble discharge.

[0035] The utility model increases the internal pressure of the equipment by filling nitrogen for pressurization, ensures the sufficiency and stability of the bubble extrusion of the workpiece, and makes up for the technical problem that the vacuum pressure of the common pressure oven is limited and the positive pressure of 10 kilograms per square centimeter cannot be stably reached; at the same time, the utility model arranges a bracket 36 inside the equipment, and the heating tube 34 is stably installed in the heating cavity 33 through the bracket 36, preventing the heating tube 34 from touching the heating inner shell 31 or the heating outer shell 32, thereby ensuring the stability of the use of the utility model and ensuring constant temperature and pressure.

[0036] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A positive and negative pressure oven constant temperature and pressure device, used for installation on a pressure oven, the pressure oven comprising a pressurizing component (20) and a heating component (30), characterized in that: The heating component (30) comprises a heating inner shell (31) and a heating outer shell (32), wherein the heating outer shell (32) wraps the heating inner shell (31), and the heating inner shell (31) is a shell-like structure with a hollow interior. A heating cavity (33) is provided between the heating inner shell (31) and the heating outer shell (32), and a heating tube (34) is provided in the heating cavity (33); the heating component (30) further comprises a bracket (36), wherein a plurality of brackets (36) are provided and evenly arranged, and the plurality of brackets (36) are arranged in the heating cavity (33), and the brackets (36) are detachably connected to the heating inner shell (31), and the heating tube (34) is installed in the bracket (36); the pressurizing component (20) comprises a boosting cylinder (21) and a tube group, wherein one end of the tube group is connected to the heating cavity (33), and the other end of the tube group is connected to the boosting cylinder (21).

2. The positive and negative pressure oven constant temperature and pressure device according to claim 1, characterized in that: The support (36) comprises a lower support (361) and an upper support (362); the lower support (361) is mounted on the end of the heating inner shell (31); the upper support (362) is mounted on the lower support (361); and a gap is left between the upper support (362) and the lower support (361).

3. The positive and negative pressure oven constant temperature and pressure device according to claim 2, characterized in that: The heating tube (34) is installed in the gap between the lower bracket (361) and the upper bracket (362).

4. The positive and negative pressure oven constant temperature and pressure device according to claim 3, characterized in that: High-temperature steam flows through the heating pipe (34).

5. The positive and negative pressure oven constant temperature and pressure device according to claim 1, characterized in that: The heating assembly (30) further comprises a hot air circulation motor (35), which is mounted outside the heating shell (32), and a rotating shaft of the hot air circulation motor (35) passes through the wall of the heating shell (32) and extends into the heating cavity (33).

6. The positive and negative pressure oven constant temperature and pressure device according to claim 5, characterized in that: The heating cavity (33) is communicated with the inner cavity of the heating inner shell (31).

7. The positive and negative pressure oven constant temperature and pressure device according to claim 6, characterized in that: The rotating shaft of the hot air circulation motor (35) is provided with paddles.

8. The positive and negative pressure oven constant temperature and pressure device according to claim 1, characterized in that: The heating shell (32) is in a sealed state.

9. A pressure oven, characterized in that: The pressure oven comprises the positive and negative pressure oven constant temperature and pressure device according to any one of claims 1 to 8.

10. The pressure oven according to claim 9, characterized in that The pressure oven further comprises a vacuum pumping component (10) and a water cooling component (40), wherein the vacuum pumping component (10) is connected to the heating cavity (33), and the water cooling component (40) is connected to the vacuum pumping component (10).

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