Pipeline arrangement structure for vacuum drying oven

Abstract

The utility model discloses a pipeline arrangement structure for a vacuum drying oven, which comprises a drying oven main body, the top of the drying oven main body is respectively provided with an air inlet and an air outlet which are connected with the inside of the drying oven, the air inlet is connected with a nitrogen inlet pipe through an air inlet main pipe, and a nitrogen valve is arranged on the nitrogen inlet pipe; the gas outlet is connected with a gas distribution cylinder through a gas outlet main pipe, the gas distribution cylinder is respectively connected with a vacuum exhaust pipe and a tail gas outlet pipe, a vacuum valve is arranged on the vacuum exhaust pipe, and a tail gas valve is arranged on the tail gas outlet pipe. And pollution during vacuum breaking is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis, in particular to a pipeline arrangement structure for a vacuum drying box. Background Art

[0002] Vacuum drying ovens are often used to dry materials during chemical synthesis. The pipe connection method of the vacuum drying ovens in existing workshops is as follows: the vacuum pipe, nitrogen pipe, and tail gas pipe of the vacuum drying oven in the workshop share a group of cylinders, which are connected to the equipment through a common main pipe.

[0003] This method has defects: when the gas cylinders and common pipelines are evacuated, gas condensation, liquid, impurities or dust will adhere to the inner walls of the pipelines. When the vacuum is broken, that is, when nitrogen is added, other substances on the inner wall of the pipeline may be blown back into the equipment, posing a risk of material contamination. Utility Model Content

[0004] The utility model provides a pipeline arrangement structure for a vacuum drying box, aiming to solve the problem that other substances on the inner wall of the pipeline may be blown back into the interior of the equipment when the vacuum is broken due to the pipeline arrangement, resulting in the risk of material contamination.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A pipeline arrangement structure for a vacuum drying box, comprising a drying box body, wherein the top of the drying box body is respectively provided with an air inlet and an air outlet connected to the inside of the box, wherein the air inlet is connected to a nitrogen air inlet pipe through an air inlet main pipe, and a nitrogen valve is provided on the nitrogen air inlet pipe;

[0007] The gas outlet is connected to the gas sub-cylinder through the gas outlet main pipe, and the gas sub-cylinder is respectively connected to the vacuum suction pipe and the tail gas outlet pipe. The vacuum suction pipe is provided with a vacuum valve, and the tail gas outlet pipe is provided with an tail gas valve.

[0008] Preferably, the sub-cylinder is arranged horizontally, and a top side of the sub-cylinder is connected to the outlet end of the outlet main pipe via a flange, and a bottom side of the sub-cylinder is flange-connected to a support pipe.

[0009] As a more preferred embodiment, the sub-cylinder forms a supporting fit with the support pipe, and the sub-cylinder is clamped and fitted between the main air outlet pipe and the support pipe, and a closing valve is provided on the support pipe.

[0010] Furthermore, the air inlet end of the air outlet main pipe is connected to the air outlet via a flange, and an inverted U-shaped buffer section is provided between the air outlet end and the air inlet end of the air outlet main pipe.

[0011] Furthermore, two connecting ports are provided on the top of the sub-cylinder, and the two connecting ports are respectively connected to the exhaust valve and the vacuum valve through flanges. The other side of the exhaust valve is connected to the air inlet end of the exhaust gas outlet pipe through a flange, and the other side of the vacuum valve is connected to the air inlet end of the vacuum exhaust pipe through a flange.

[0012] Preferably, the outlet end of the air intake main pipe is connected to the air inlet via a flange, the air intake end of the air intake main pipe is connected to the nitrogen valve via a flange, and one side of the nitrogen valve is connected to the outlet end of the nitrogen inlet pipe via a flange.

[0013] Preferably, the exhaust gas outlet pipe, the nitrogen gas inlet pipe and the vacuum exhaust pipe are all arranged vertically.

[0014] As a more preferred embodiment, the exhaust gas outlet pipe, the nitrogen gas inlet pipe and the vacuum exhaust pipe are located in the same vertical plane.

[0015] Beneficial effects of the utility model:

[0016] The utility model separates the inlet and outlet pipes, wherein the inlet part is connected to the air inlet through an air inlet main pipe and air is taken in separately; the outlet part shares the same air sub-cylinder, which is connected to the air outlet through the same air outlet main pipe, so as to avoid the risk of material contamination caused by other substances on the inner wall of the pipe being blown back into the interior of the equipment when the vacuum is broken, that is, when nitrogen is added. At the same time, a buffer section is arranged on the air outlet main pipe to prevent back suction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the arrangement structure of the utility model;

[0018] In the figure: 1. vacuum exhaust pipe; 2. nitrogen inlet pipe; 3. exhaust gas outlet pipe; 4. support pipe; 5. vacuum valve; 6. nitrogen valve; 7. exhaust valve; 8. closing valve; 9. gas cylinder; 10. air inlet main pipe; 11. air outlet main pipe; 12. air inlet; 13. air outlet; 14. drying box body. DETAILED DESCRIPTION

[0019] As follows, embodiments are further described with reference to the accompanying drawings.

[0020] like Figure 1 As shown, as a preferred embodiment 1, a pipeline arrangement structure for a vacuum drying box includes a drying box body 14, characterized in that an air inlet 12 and an air outlet 13 connected to the inside of the box are respectively provided on the top of the drying box body 14, the air inlet 12 is connected to a nitrogen air inlet pipe 2 through an air inlet main pipe 10, and a nitrogen valve 6 is provided on the nitrogen air inlet pipe 2;

[0021] The gas outlet 13 is connected to the gas sub-cylinder 9 through the gas outlet main pipe 11, and the gas sub-cylinder 9 is respectively connected to the vacuum suction pipe 1 and the exhaust gas outlet pipe 3. The vacuum suction pipe 1 is provided with a vacuum valve 5, and the exhaust gas outlet pipe 3 is provided with an exhaust valve 7.

[0022] Embodiment 1 provides a pipeline arrangement structure for a vacuum drying box. Different from the previous three-pipe shared one group of cylinders 9 and main pipes, the inlet and outlet pipes are separated, and the inlet part includes a nitrogen inlet pipe 2, which is connected to the air inlet port 12 through the air inlet main pipe 10, and the air is inhaled separately;

[0023] The exhaust part includes a vacuum exhaust pipe 1 and an exhaust gas outlet pipe 3, which share the same sub-cylinder 9. The sub-cylinder 9 is connected to the outlet 13 through the same outlet main pipe 11. When the sub-cylinder 9 and the common pipeline are evacuated, gas condensation, liquid accumulation, impurities or dust will adhere to the inner wall of the pipeline to avoid breaking the vacuum, that is, when nitrogen is added, other substances on the inner wall of the pipeline may be blown back into the equipment to cause material contamination risk.

[0024] As a preferred embodiment 2, the sub-cylinder 9 is arranged horizontally, and the top side of the sub-cylinder 9 is connected to the outlet end of the outlet main pipe 11 through a flange, and the bottom side of the sub-cylinder 9 is flange-connected to the support pipe 4. It is convenient to keep the sub-cylinder 9 fixedly installed.

[0025] As a preferred embodiment 3, the sub-cylinder 9 forms a support match with the support pipe 4, and the sub-cylinder 9 is clamped and matched between the gas outlet main pipe 11 and the support pipe 4, and a closing valve 8 is provided on the support pipe 4. When the closing valve 8 is closed, the support pipe 4 cooperates with the gas outlet main pipe 11 to form a limit fixation for the sub-cylinder 9, and the support pipe 4 is used to support the sub-cylinder 9; and when the closing valve 8 is opened, the support pipe 4 can be used as a spare connecting pipe, which is connected to the gas outlet main pipe 11 after being connected to other equipment.

[0026] As a preferred embodiment 4, the air inlet end of the air outlet main pipe 11 is connected to the air outlet 13 by a flange to ensure the connection stability, and an inverted U-shaped buffer section is provided between the air outlet end and the air inlet end of the air outlet main pipe 11, and the buffer section is used to ensure that the gas condensation liquid, impurities or dust generated during the air extraction does not flow back, and does not cause additional pollution to the drying box.

[0027] As a preferred embodiment 5, the top of the gas cylinder 9 is provided with two connection ports, which are respectively connected to the tail gas valve 7 and the vacuum valve 5 through flanges, the other side of the tail gas valve 7 is connected to the air inlet end of the tail gas outlet pipe 3 through a flange, and the other side of the vacuum valve 5 is connected to the air inlet end of the vacuum exhaust pipe 1 through a flange. Ensure the firmness of the installation.

[0028] As a preferred embodiment 6, the outlet end of the air intake main pipe 10 is connected to the air inlet 12 via a flange, the air intake end of the air intake main pipe 10 is connected to the nitrogen valve 6 via a flange, and one side of the nitrogen valve 6 is connected to the outlet end of the nitrogen inlet pipe 2 via a flange to ensure the firmness of the installation.

[0029] As a preferred embodiment 7, the exhaust gas outlet pipe 3, the nitrogen gas inlet pipe 2 and the vacuum exhaust pipe 1 are all arranged vertically to save installation space.

[0030] As a preferred embodiment 8, the exhaust gas outlet pipe 3, the nitrogen gas inlet pipe 2 and the vacuum exhaust pipe 1 are located in the same vertical plane, saving installation space.

[0031] As a preferred embodiment 9, the structure is usually installed against a wall or a workshop wall, and the pipeline can form a detachable fixed fit with the wall through the pipeline mounting parts and fasteners, further ensuring the stability of the installation.

[0032] The working principle of this utility model:

[0033] The utility model provides a pipeline arrangement structure for a vacuum drying box. Different from the previous three-pipe shared one group of cylinders 9 and main pipes, the inlet and exhaust pipes are separated, and the inlet part includes a nitrogen inlet pipe 2, which is connected to the air inlet port 12 through the air inlet main pipe 10, and the air is inhaled separately;

[0034] The exhaust part includes a vacuum exhaust pipe 1 and an exhaust gas outlet pipe 3, which share the same sub-cylinder 9. The sub-cylinder 9 is connected to the outlet 13 through the same outlet main pipe 11. When the sub-cylinder 9 and the common pipeline are evacuated, gas condensation, liquid accumulation, impurities or dust will adhere to the inner wall of the pipeline to avoid breaking the vacuum, that is, when nitrogen is added, other substances on the inner wall of the pipeline may be blown back into the equipment to cause material contamination risk.

Claims

1. A pipeline arrangement structure for a vacuum drying oven, comprising a drying oven body (14), characterized in that: The top of the drying box body (14) is provided with an air inlet (12) and an air outlet (13) connected to the inside of the box, respectively; the air inlet (12) is connected to a nitrogen air inlet pipe (2) via an air inlet main pipe (10); and a nitrogen valve (6) is provided on the nitrogen air inlet pipe (2); The gas outlet (13) is connected to the gas sub-cylinder (9) via a gas outlet main pipe (11); the gas sub-cylinder (9) is respectively connected to a vacuum suction pipe (1) and an exhaust gas outlet pipe (3); a vacuum valve (5) is provided on the vacuum suction pipe (1); and an exhaust gas valve (7) is provided on the exhaust gas outlet pipe (3).

2. The pipeline arrangement structure for a vacuum drying box according to claim 1, characterized in that: The gas sub-cylinder (9) is arranged horizontally, and the top side of the gas sub-cylinder (9) is connected to the gas outlet end of the gas outlet main pipe (11) via a flange, and the bottom side of the gas sub-cylinder (9) is flange-connected to a support pipe (4).

3. The pipeline arrangement structure for a vacuum drying box according to claim 2, characterized in that: The gas sub-cylinder (9) and the support pipe (4) form a supporting fit, and the gas sub-cylinder (9) is clamped and fitted between the gas outlet main pipe (11) and the support pipe (4), and a closing valve (8) is provided on the support pipe (4).

4. The pipeline arrangement structure for a vacuum drying box according to claim 3, characterized in that: The air inlet end of the air outlet main pipe (11) is connected to the air outlet (13) via a flange, and an inverted U-shaped buffer section is provided between the air outlet end and the air inlet end of the air outlet main pipe (11).

5. The pipeline arrangement structure for a vacuum drying box according to claim 4, characterized in that: The top of the gas sub-cylinder (9) is provided with two connection ports, which are respectively connected to the exhaust valve (7) and the vacuum valve (5) via flanges; the other side of the exhaust valve (7) is connected to the air inlet end of the exhaust gas outlet pipe (3) via a flange; and the other side of the vacuum valve (5) is connected to the air inlet end of the vacuum exhaust pipe (1) via a flange.

6. The pipeline arrangement structure for a vacuum drying box according to claim 1, characterized in that: The outlet end of the air intake main pipe (10) is connected to the air inlet (12) via a flange, the air intake end of the air intake main pipe (10) is connected to the nitrogen valve (6) via a flange, and one side of the nitrogen valve (6) is connected to the outlet end of the nitrogen air intake pipe (2) via a flange.

7. The pipeline arrangement structure for a vacuum drying box according to claim 1, characterized in that: The exhaust gas outlet pipe (3), the nitrogen gas inlet pipe (2) and the vacuum exhaust pipe (1) are all arranged vertically.

8. The pipeline arrangement structure for a vacuum drying box according to claim 7, characterized in that: The exhaust gas outlet pipe (3), the nitrogen gas inlet pipe (2) and the vacuum exhaust pipe (1) are located in the same vertical plane.

Images