Positive and negative pressure drying oven vacuumizing pipeline cooling device

Abstract

The utility model relates to the technical field of pressure drying ovens, in particular to a positive and negative pressure drying oven vacuumizing pipeline cooling device which is used for being installed in a drying oven assembly, a drying oven body and a cooling pipe set are further arranged in the drying oven assembly, the cooling pipe set is located outside the drying oven body and communicated with the drying oven body, and the cooling pipe set comprises a heat exchanger and a vacuum pump. The heat exchanger and the vacuum pump sequentially communicate with the oven body; the heat exchanger is provided with an auxiliary air outlet pipe and an air inlet pipe, the cooling pipe set further comprises a main air outlet pipe, one end of the main air outlet pipe is communicated with the oven body, the other end of the main air outlet pipe is communicated with the air inlet pipe on the heat exchanger, the vacuum pump is communicated with a connecting pipe, and the connecting pipe is communicated with the auxiliary air outlet pipe on the heat exchanger. A quick-release locking piece is arranged at the end of the main air outlet pipe and arranged on the connecting portion of the air inlet pipe and the main air outlet pipe in a sleeving mode. The drying oven assembly comprises the positive and negative pressure drying oven vacuumizing pipeline cooling device.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure ovens, in particular to a cooling device for a vacuum pumping pipeline of a positive and negative pressure oven. Background Art

[0002] Industrial pressure ovens are commonly used for drying, curing, baking and processing various materials, such as coatings, paints, plastics and metal products, etc. They can work in high-temperature and high-pressure environments and are widely used in the fields of automobile manufacturing, aerospace, electronic products and other industries. Industrial pressure ovens include positive pressure ovens and negative pressure ovens. The positive and negative pressure ovens can be used under positive and negative pressure conditions and are applied to the chip mounting and filling processes, which can effectively eliminate bubbles and increase adhesion. The existing vacuum pumping method is to directly pump vacuum from the oven or pump vacuum at room temperature. When the oven reaches a certain temperature, directly pumping vacuum from the inside of the oven may cause the vacuum pumping pipeline to be corroded, and seriously may cause damage to the vacuum pump, thus affecting the use stability and unable to meet the requirement of pumping vacuum at high temperatures.

[0003] To solve the above technical problems, Chinese Patent CN208553611U discloses a tail gas condensation device for an oven, which includes a condensation cabinet with an inner cavity. The exhaust gas discharge pipe of the oven is communicated with the inner cavity in the condensation cabinet, and the air outlet of the exhaust gas discharge pipe extends into the inner cavity. A number of left-side water inlet condensation pipes and right-side water inlet condensation pipes are alternately arranged in sequence along the vertical direction in the inner cavity. The above patent adopts the method of connecting the exhaust gas discharge pipe of the oven with the inner cavity of the condensation cabinet, so that the gas discharged from the oven is introduced into the inner cavity of the condensation cabinet, and then the cooling water in the left-side water inlet condensation pipe and the right-side water inlet condensation pipe is used to exchange heat with the gas to achieve heat exchange. However, the high-temperature gas will cause high-temperature corrosion to the air outlet, and the air outlet of the patent cannot be replaced, thus affecting the use stability.

[0004] Therefore, it is necessary for those skilled in the art to provide a cooling device for a vacuum pumping pipeline of a positive and negative pressure oven to reduce the corrosion of the vacuum pumping pipeline by high-temperature gas and improve the use stability. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a cooling device for a vacuum pumping pipeline of a positive and negative pressure oven to solve the technical problem that when the oven reaches a certain temperature, directly pumping vacuum from the inside of the oven may cause the vacuum pumping pipeline to be corroded, and seriously may cause damage to the vacuum pump, affecting the processing stability in the prior art.

[0006] The technical solution adopted by the present utility model to solve its technical problems is as follows: A cooling device for the vacuum pumping pipeline of a positive and negative pressure oven, which is used to be installed inside the oven assembly. An oven furnace body and a cooling pipe group are also provided inside the oven assembly. The cooling pipe group is located outside the oven furnace body and is connected to the oven furnace body. The cooling pipe group includes a heat exchanger and a vacuum pump, and the heat exchanger and the vacuum pump are sequentially connected to the oven furnace body; a secondary outlet pipe and an inlet pipe are provided on the heat exchanger, and a main outlet pipe is further included in the cooling pipe group. One end of the main outlet pipe is connected to the oven furnace body, and the other end of the main outlet pipe is connected to the inlet pipe on the heat exchanger. A connecting pipe is connected to the vacuum pump, and the connecting pipe is connected to the secondary outlet pipe on the heat exchanger; a quick-release locking member is provided at the end of the main outlet pipe, and the quick-release locking member is sleeved on the connecting part of the inlet pipe and the main outlet pipe.

[0007] Further, a first convex ring is provided at the end of the main outlet pipe, an assembly joint is connected in cooperation with the inlet pipe, and a second convex ring is provided on the assembly joint. The second convex ring abuts against the first convex ring and is connected in cooperation with the first convex ring.

[0008] Further, the quick-release locking member is sleeved outside the first convex ring and the second convex ring, and the quick-release locking member is clamped and connected outside the first convex ring and the second convex ring.

[0009] Further, the quick-release locking member is a clamp.

[0010] Further, the diameters of the first convex ring and the second convex ring are the same.

[0011] Further, flanges are also provided on the main outlet pipe. There are two flanges and they are arranged oppositely, and the two flanges are threadedly connected as a whole.

[0012] Further, a three-way pipe is also provided in the cooling pipe group. One end of the three-way pipe is connected to the heat exchanger, and the other end of the three-way pipe is connected to the connecting pipe.

[0013] Further, the three-way pipe is connected to the secondary outlet pipe, and a valve is provided on the three-way pipe.

[0014] An oven assembly, the oven assembly includes the cooling device for the vacuum pumping pipeline of the positive and negative pressure oven described in any one of the above items.

[0015] The beneficial effects of the present utility model are as follows: A quick-release locking member and a flange are respectively added to the main air outlet pipe of the present utility model, so that the main air outlet pipe can be quickly and conveniently disassembled, improving the use stability. At the same time, an assembly joint is connected and assembled in the air inlet pipe, thereby reducing the direct damage of high-temperature gas to the inner wall of the air inlet pipe and increasing the service life of the air inlet pipe. The main air outlet pipe of the present utility model is connected to the oven furnace body through a flange, reducing the influence of the external environment on the sealing performance of the oven furnace body. At the same time, the main air outlet pipe is completely installed outside, reducing the installation difficulty and improving the replacement convenience, thereby ensuring the stability and service life of the present utility model during use. Brief Description of the Drawings

[0016] Figure 1 is a perspective view of the cooling device for the vacuum pumping pipeline of the positive and negative pressure oven of the present utility model.

[0017] Figure 2 is a perspective view (with part of the outer shell omitted) of the cooling device for the vacuum pumping pipeline of the positive and negative pressure oven of the present utility model.

[0018] Figure 3 is a perspective view of the cooling pipe group in the cooling device for the vacuum pumping pipeline of the positive and negative pressure oven of the present utility model.

[0019] Figure 4 is Figure 3 exploded view of.

[0020] Figure 5 is Figure 4 partial enlarged schematic view of part A in.

[0021] Figure 6 is Figure 3 left view of.

[0022] The markings of each component in the drawings are as follows: 10, oven assembly; 11, oven furnace body; 20, cooling pipe group; 21, main air outlet pipe; 211, first convex ring; 23, flange; 24, three-way pipe; 25, connecting pipe; 26, valve; 27, heat exchanger; 271, water inlet; 272, water outlet; 273, auxiliary air outlet pipe; 274, air inlet pipe; 29, vacuum pump; 30, quick-release locking member; 31, assembly joint; 311, second convex ring. Detailed Description of the Preferred Embodiment

[0023] The present utility model will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present utility model in a schematic manner, so it only shows the components related to the present utility model.

[0024] Please refer to Figure 1, the present utility model provides an oven assembly 10, which includes a cooling device for the positive and negative pressure oven vacuum pumping pipeline. The cooling device for the positive and negative pressure oven vacuum pumping pipeline is installed inside the oven assembly 10. An oven furnace body 11 and a cooling pipe group 20 are further provided inside the oven assembly 10. The cooling pipe group 20 is located outside the oven furnace body 11 and is connected to the oven furnace body 11. The present utility model arranges the cooling pipe group 20 outside the oven furnace body 11 to improve the airtightness of the oven furnace body 11 and ensure the use stability.

[0025] Please refer to Figure 3 , Figure 4 , the cooling pipe group 20 includes a heat exchanger 27 and a vacuum pump 29. The heat exchanger 27 and the vacuum pump 29 are sequentially connected to the oven furnace body 11. During use, the hot air inside the oven furnace body 11 is drawn into the heat exchanger 27 by the vacuum pump 29, and the hot air is heat-exchanged and cooled to obtain cold air. Then, the cold air is drawn out of the equipment by the vacuum pump 29 to complete the vacuum pumping operation of the oven furnace body 11.

[0026] The present utility model arranges the vacuum pump 29 below the heat exchanger 27. When the oven reaches a certain temperature, the inside of the oven is evacuated. The high-temperature gas is cooled by the heat exchanger 27 to obtain cold air, thereby reducing the influence of the high-temperature gas on the vacuum pump 29 and ensuring the use stability of the present utility model.

[0027] Please refer to Figure 5 , Figure 6 , the heat exchanger 27 includes a housing and copper pipes coiled inside the housing. The housing is in the shape of a square shell with a hollow interior. An inlet 271 and an outlet 272 are provided on the housing. The inlet 271 and the outlet 272 penetrate the housing shell and are respectively connected to both ends of the copper pipes. A secondary outlet pipe 273 and an inlet pipe 274 are further provided on the housing. The secondary outlet pipe 273 and the inlet pipe 274 penetrate the housing shell and are connected to the internal cavity of the housing.

[0028] During use, a coolant flows through the copper pipes. The coolant includes but is not limited to water. The coolant is introduced into the copper pipes through the inlet 271 and exits through the outlet 272, thereby realizing the cooling of the internal cavity of the heat exchanger 27. The hot air inside the oven furnace body 11 is drawn into the heat exchanger 27 through the inlet pipe 274. The hot air contacts the copper pipes inside the heat exchanger 27 to realize heat exchange, thereby reducing the temperature of the hot air, completing the cooling and obtaining cold air. The cold air is discharged from the secondary outlet pipe 273 and introduced into the vacuum pump 29 to complete the vacuum pumping operation.

[0029] Further, the cooling pipe group 20 further includes a main air outlet pipe 21. One end of the main air outlet pipe 21 is communicated with the oven furnace body 11, and the other end of the main air outlet pipe 21 is communicated with the intake pipe 274 on the heat exchanger 27. A connecting pipe 25 is communicated with the vacuum pump 29, and the connecting pipe 25 is communicated with the auxiliary air outlet pipe 273 on the heat exchanger 27.

[0030] Specifically, a first convex ring 211 is provided at the end of the main air outlet pipe 21. An assembly joint 31 is connected in cooperation with the intake pipe 274. A second convex ring 311 is provided on the assembly joint 31. The second convex ring 311 abuts against the first convex ring 211 and is connected in cooperation with the first convex ring 211. Preferably, the first convex ring 211 and the second convex ring 311 have the same diameter. Preferably, the assembly joint 31 is made of a high-temperature resistant material, such as ceramics.

[0031] A quick-release locking member 30 is provided on the end of the main air outlet pipe 21. The quick-release locking member 30 is sleeved on the connecting portion of the intake pipe 274 and the main air outlet pipe 21 and fixedly connects the intake pipe 274 and the main air outlet pipe 21 into one body.

[0032] The quick-release locking member 30 is sleeved outside the first convex ring 211 and the second convex ring 311, and the quick-release locking member 30 is clamped and connected to the outside of the first convex ring 211 and the second convex ring 311. Preferably, the quick-release locking member 30 includes, but is not limited to, a clamp.

[0033] Two flanges 23 are also provided on the main air outlet pipe 21 and are arranged oppositely. The two flanges 23 are threadedly connected into one body by fasteners such as bolts or screws.

[0034] During use, the high-temperature gas in the oven furnace body 11 is sucked out, passes through the main air outlet pipe 21 and the intake pipe 274 in sequence and then enters the heat exchanger 27 to complete cooling. Then, the cooled gas is sucked out and passes through the auxiliary air outlet pipe 273 and the connecting pipe 25 in sequence, and finally is sucked into the vacuum pump 29. The cooled air is discharged outside the equipment through the vacuum pump 29 to complete the vacuum pumping operation. It can be seen that before the high-temperature gas is drawn out from the oven furnace body 11 and enters the heat exchanger 27, it will pass through the main air outlet pipe 21 and the intake pipe 274. The high-temperature gas will cause high-temperature corrosion to the main air outlet pipe 21 and the intake pipe 274, resulting in a reduction in the service life of the main air outlet pipe 21 and the intake pipe 274, and further affecting the overall service life and use stability of the equipment.

[0035] The utility model respectively adds a quick-release locking member 30 and a flange 23 on the main air outlet pipe 21, so that the main air outlet pipe 21 can be quickly and conveniently disassembled, improving the use stability. At the same time, a fitting joint 31 is connected and assembled in the air inlet pipe 274, thereby reducing the direct damage of high-temperature gas to the inner wall of the air inlet pipe 274 and improving the service life of the air inlet pipe 274. The utility model connects the main air outlet pipe 21 and the oven furnace body 11 through the flange 23, reducing the influence of the external environment on the sealing performance of the oven furnace body 11. At the same time, the main air outlet pipe 21 is completely installed outside, reducing the installation difficulty and improving the replacement convenience, thereby ensuring the use stability and service life of the utility model.

[0036] Further, a three-way pipe 24 is also provided in the cooling pipe group 20. One end of the three-way pipe 24 is communicated with the heat exchanger 27, and the other end of the three-way pipe 24 is communicated with the connecting pipe 25.

[0037] Specifically, the three-way pipe 24 is communicated with the auxiliary air outlet pipe 273, and a valve 26 is provided on the three-way pipe 24. The valve 26 includes but is not limited to an electromagnetic valve. The valve 26 is used to control the on-off of the three-way pipe 24 to ensure the transmission sequence. When the valve 26 is started, the cooling gas flows from the heat exchanger 27 into the vacuum pump 29. When the valve 26 is closed, the cooling gas flows out of the heat exchanger 27, passes through the three-way pipe 24, and finally flows into another pipe (not shown in the figure), and the cooling gas cannot enter the vacuum pump 29, so as to ensure the controllability and stability of the air circulation.

[0038] The specific operation mode of the utility model is as follows: the hot air inside the oven furnace body 11 is pumped into the heat exchanger 27 by the vacuum pump 29, the hot air is heat-exchanged and cooled to obtain cold air, and then the cold air is discharged to the outside of the equipment through the vacuum pump 29 to complete the rapid vacuum pumping operation.

[0039] The utility model respectively adds a quick-release locking member 30 and a flange 23 on the main air outlet pipe 21, so that the main air outlet pipe 21 can be quickly and conveniently disassembled, improving the use stability. At the same time, a fitting joint 31 is connected and assembled in the air inlet pipe 274, thereby reducing the direct damage of high-temperature gas to the inner wall of the air inlet pipe 274 and improving the service life of the air inlet pipe 274. The utility model connects the main air outlet pipe 21 and the oven furnace body 11 through the flange 23, reducing the influence of the external environment on the sealing performance of the oven furnace body 11. At the same time, the main air outlet pipe 21 is completely installed outside, reducing the installation difficulty and improving the replacement convenience, thereby ensuring the use stability and service life of the utility model.

[0040] It can be understood that the present utility model is described through some embodiments. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A cooling device for the vacuum pumping pipeline of a positive and negative pressure oven, which is used to be installed in an oven assembly (10). An oven furnace body (11) and a cooling pipe group (20) are also arranged in the oven assembly (10). The cooling pipe group (20) is located outside the oven furnace body (11) and is communicated with the oven furnace body (11), and is characterized in that, The cooling pipe group (20) includes a heat exchanger (27) and a vacuum pump (29). The heat exchanger (27) and the vacuum pump (29) are sequentially connected to the oven furnace body (11). A secondary air outlet pipe (273) and an air inlet pipe (274) are provided on the heat exchanger (27). The cooling pipe group (20) further includes a main air outlet pipe (21). One end of the main air outlet pipe (21) is connected to the oven furnace body (11), and the other end of the main air outlet pipe (21) is connected to the air inlet pipe (274) on the heat exchanger (27). A connecting pipe (25) is connected to the vacuum pump (29), and the connecting pipe (25) is connected to the secondary air outlet pipe (273) on the heat exchanger (27). A quick-release locking member (30) is provided at the end of the main air outlet pipe (21), and the quick-release locking member (30) is sleeved on the connecting portion of the air inlet pipe (274) and the main air outlet pipe (21).

2. The cooling device for the vacuum pumping pipeline of the positive and negative pressure oven according to claim 1, characterized in that A first convex ring (211) is provided at the end of the main air outlet pipe (21). An assembly joint (31) is fitted and connected inside the air inlet pipe (274). A second convex ring (311) is provided on the assembly joint (31). The second convex ring (311) abuts against the first convex ring (211) and is fitted and connected with the first convex ring (211).

3. The cooling device for the vacuum pumping pipeline of the positive and negative pressure oven according to claim 2, wherein, The quick-release locking member (30) is sleeved outside the first convex ring (211) and the second convex ring (311), and the quick-release locking member (30) is snap-fitted and connected to the outside of the first convex ring (211) and the second convex ring (311).

4. The cooling device for the vacuum pumping pipeline of the positive and negative pressure oven according to claim 3, characterized in that, The quick-release locking member (30) is a clamp.

5. The positive and negative pressure oven vacuum pumping pipeline cooling device according to claim 3, characterized in that, The first convex ring (211) and the second convex ring (311) have the same diameter.

6. The cooling device for the vacuum pumping pipeline of the positive and negative pressure oven according to claim 1, characterized in that, Two flanges (23) are further provided on the main air outlet pipe (21), and the two flanges (23) are arranged oppositely and are threadedly connected as a whole.

7. The cooling device for the vacuum pumping pipeline of the positive and negative pressure oven according to claim 1, characterized in that, A tee pipe (24) is further provided in the cooling pipe group (20). One end of the tee pipe (24) is connected to the heat exchanger (27), and the other end of the tee pipe (24) is connected to the connecting pipe (25).

8. The positive and negative pressure oven vacuum pumping pipeline cooling device according to claim 7, characterized in that, The tee pipe (24) is connected to the secondary air outlet pipe (273), and a valve (26) is provided on the tee pipe (24).

9. An oven assembly, characterized in that, The oven assembly includes the positive and negative pressure oven vacuum pumping pipeline cooling device according to any one of claims 1-8.

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