Efficient vacuum pump pipeline structure

Abstract

The utility model relates to the technical field of vacuum pumps, in particular to an efficient vacuum pump pipeline structure. The efficient vacuum pump pipeline structure comprises a roots vacuum pump, the front side of an exhaust pipe of the roots vacuum pump is communicated with an exhaust valve, and a bypass assembly is placed on the front side of an air outlet of the exhaust valve; before the Roots vacuum pump works, the exhaust valve is opened, when the pressure in the exhaust pipe of the Roots vacuum pump is too large, high-pressure gas can eject the sealing disc open and then is exhausted from the bypass pipe, so that the pressure in the exhaust pipe of the Roots vacuum pump is relieved, and when the exhaust pressure of the Roots vacuum pump is reduced, the suction capacity of the Roots vacuum pump can be improved; therefore, the vacuumizing efficiency is improved; when the bypass assembly breaks down, the bypass assembly can be quickly disassembled for maintenance only by screwing off the bolt and the nut, at the moment, the exhaust valve is closed, and it can be guaranteed that the roots vacuum pump can still work normally in the maintenance process of the bypass assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a high-efficiency vacuum pump pipeline structure. Background Art

[0002] Roots vacuum pump, referred to as Roots pump, is usually used for boosting to reduce power consumption and increase pumping speed to achieve energy saving. Roots vacuum pump is characterized by fast start-up, low power consumption, low operation and maintenance costs, high pumping speed, high efficiency, insensitivity to small amounts of water vapor and dust contained in the pumped gas, high pumping rate within a certain pressure range, and the ability to quickly remove suddenly released gas. Based on the above characteristics, it is currently widely used in smelting, degassing, rolling in vacuum metallurgy, as well as vacuum distillation, vacuum concentration and vacuum drying in the chemical, food and pharmaceutical industries;

[0003] However, the vacuuming efficiency of Roots vacuum pumps is greatly affected by the exhaust pressure. When the Roots vacuum pump is running, the higher the exhaust pressure, the smaller the suction volume will be, and the corresponding shaft power consumption will be greater; on the contrary, when the exhaust pressure is smaller, the suction volume will be larger, and the corresponding shaft power consumption will be smaller; therefore, in the actual operation and maintenance process, the exhaust pressure data should be observed in real time. When abnormal exhaust pressure data appears, corresponding measures should be taken immediately to update and transform the entire vacuum system. In view of the above situation, technical innovation is carried out on the basis of the existing vacuum pumps. Utility Model Content

[0004] The purpose of the utility model is to provide a high-efficiency vacuum pump pipeline structure to solve the problems raised in the above background technology.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: a high-efficiency vacuum pump pipeline structure, comprising:

[0006] A Roots vacuum pump, wherein the front side of the exhaust pipe of the Roots vacuum pump is connected to an exhaust valve, and a bypass component is placed in front of the air outlet of the exhaust valve, wherein:

[0007] The bypass assembly includes a bypass pipe, a pressure relief chamber is opened inside the bypass pipe, a limit ring and a cross support frame are arranged inside the bypass pipe, the limit ring and the cross support frame are respectively located at the front and rear sides of the pressure relief chamber, a through hole is opened through the front side of the cross support frame, a connecting column is arranged in the through hole, a limit disk and a sealing disk are respectively arranged at the front and rear sides of the connecting column, and a spring is placed on the outer ring of the connecting column.

[0008] Preferably, the limiting disk is located at the front side of the cross support frame, the rear side of the sealing disk is in contact with the front side of the limiting ring, and the spring is located between the sealing disk and the cross support frame and is placed in the pressure relief chamber.

[0009] Preferably, a first flange is provided on the outer ring of the air outlet of the bypass pipe, and a second flange is provided on the outer ring of the air inlet and outlet of the bypass pipe.

[0010] Preferably, a third flange is provided on the outer ring of the gas outlet of the exhaust valve, bolts are provided in the docking holes of the third flange and the second flange, and nuts are screwed on the outer side walls of the bolts.

[0011] Preferably, an annular groove is provided on the front side of the air outlet of the exhaust valve, and a sealing ring is placed in the annular groove.

[0012] Preferably, the front side of the sealing ring is in contact with the rear side of the bypass pipe, and the exhaust valve is connected to the bypass pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model can push open the sealing disk when the pressure in the exhaust pipe of the Roots vacuum pump is too high, so as to release the pressure in the exhaust pipe of the Roots vacuum pump. When the exhaust pressure of the Roots vacuum pump is reduced, the suction volume of the Roots vacuum pump is increased, thereby improving the vacuuming efficiency.

[0015] When the bypass assembly fails, you only need to unscrew the bolts and nuts to quickly disassemble it for maintenance. At this time, closing the exhaust valve can ensure that the bypass assembly can still work normally during the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the pipeline structure of the high-efficiency vacuum pump of the utility model;

[0017] Figure 2 It is a top cross-sectional view of the pipeline structure of the high-efficiency vacuum pump of the utility model;

[0018] Figure 3 For this utility model Figure 2 Enlarged view of part A.

[0019] In the figure: 1. Roots vacuum pump; 2. bypass pipe; 21. first flange; 22. second flange; 3. exhaust valve; 31. third flange; 32. bolts; 33. nuts; 34. sealing ring; 4. cross support frame; 41. limit plate; 42. connecting column; 43. spring; 44. sealing plate; 45. limit ring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 3 The high-efficiency vacuum pump pipeline structure includes a Roots vacuum pump 1. The front side of the exhaust pipe of the Roots vacuum pump 1 is connected with an exhaust valve 3. A bypass component is placed in front of the air outlet of the exhaust valve 3. Before the Roots vacuum pump 1 works, the exhaust valve 3 is opened.

[0022] The bypass assembly includes a bypass pipe 2, a pressure relief chamber is provided inside the bypass pipe 2, a limit ring 45 and a cross support frame 4 are fixedly provided inside the bypass pipe 2, the limit ring 45 and the cross support frame 4 are respectively located at the front and rear sides of the pressure relief chamber, a through hole is provided on the front side of the cross support frame 4, a connecting column 42 is slidably provided in the through hole, a limit plate 41 and a sealing plate 44 are respectively fixedly provided on the front and rear sides of the connecting column 42, the limit plate 41 is located on the front side of the cross support frame 4, the rear side of the sealing plate 44 is in contact with the front side of the limit ring 45, and the outer ring of the connecting column 42 is arranged A spring 43 is placed between the sealing disk 44 and the cross support frame 4 and in the pressure relief chamber. Part of the airflow discharged from the exhaust pipe of the Roots vacuum pump 1 will enter the bypass pipe 2 through the exhaust valve 3 and squeeze the sealing disk 44. When the pressure in the exhaust pipe of the Roots vacuum pump 1 is too high, the sealing disk 44 is squeezed to overcome the elastic force of the spring 43. At this time, the sealing disk 44 moves to the pressure relief chamber. At this time, the gas pressure in the exhaust pipe of the Roots vacuum pump 1 will pass through the pressure relief chamber and the cross support frame 4 and be discharged, thereby reducing the gas pressure in the exhaust pipe of the Roots vacuum pump 1.

[0023] A first flange 21 is fixedly provided on the outer ring of the gas outlet of the bypass pipe 2, a second flange 22 is fixedly provided on the outer ring of the gas inlet and outlet of the bypass pipe 2, a third flange 31 is fixedly provided on the outer ring of the gas outlet of the exhaust valve 3, bolts 32 are fixedly provided in the docking holes of the third flange 31 and the second flange 22, nuts 33 are screwed on the outer wall of the bolts 32, an annular groove is provided on the front side of the gas outlet of the exhaust valve 3, a sealing ring 34 is placed in the annular groove, the front side of the sealing ring 34 is fitted with the rear side of the bypass pipe 2, the exhaust valve 3 is connected to the bypass pipe 2, the connecting gap between the exhaust valve 3 and the bypass pipe 2 is sealed by the sealing ring 34, when the bypass assembly fails, it can be disassembled for maintenance by simply unscrewing the bolts 32 and the nuts 33, at this time, closing the exhaust valve 3 can ensure that the bypass assembly can still work normally during the maintenance process.

[0024] Working principle: before the Roots vacuum pump 1 works, the exhaust valve 3 is opened, and part of the airflow discharged from the exhaust pipe of the Roots vacuum pump 1 will enter the bypass pipe 2 through the exhaust valve 3 and squeeze the sealing disk 44. When the pressure in the exhaust pipe of the Roots vacuum pump 1 is too high, the sealing disk 44 is squeezed to overcome the elastic force of the spring 43, and the sealing disk 44 moves to the pressure relief chamber. At this time, the gas pressure in the exhaust pipe of the Roots vacuum pump 1 will pass through the pressure relief chamber and the cross support frame 4 and be discharged, so as to reduce the gas pressure in the exhaust pipe of the Roots vacuum pump 1. When the bypass component fails, it can be disassembled for maintenance by simply unscrewing the bolts 32 and the nuts 33. At this time, closing the exhaust valve 3 can ensure that the bypass component can still work normally during the maintenance process.

Claims

1. High-efficiency vacuum pump pipeline structure, characterized by: include: A Roots vacuum pump (1), wherein the front side of the exhaust pipe of the Roots vacuum pump (1) is connected to an exhaust valve (3), and a bypass component is arranged on the front side of the exhaust port of the exhaust valve (3), wherein: The bypass assembly comprises a bypass pipe (2), a pressure relief chamber is provided inside the bypass pipe (2), a limit ring (45) and a cross support frame (4) are arranged inside the bypass pipe (2), the limit ring (45) and the cross support frame (4) are respectively located at the front and rear sides of the pressure relief chamber, a through hole is provided through the front side of the cross support frame (4), a connecting column (42) is arranged in the through hole, a limit disk (41) and a sealing disk (44) are respectively arranged at the front and rear sides of the connecting column (42), and a spring (43) is arranged on the outer ring of the connecting column (42).

2. The high-efficiency vacuum pump pipeline structure according to claim 1 is characterized in that: The limiting plate (41) is located on the front side of the cross support frame (4), the rear side of the sealing plate (44) is in contact with the front side of the limiting ring (45), and the spring (43) is located between the sealing plate (44) and the cross support frame (4) and is placed in the pressure relief chamber.

3. The high-efficiency vacuum pump pipeline structure according to claim 2 is characterized in that: The outer ring of the air outlet of the bypass pipe (2) is provided with a first flange (21), and the outer ring of the air inlet and outlet of the bypass pipe (2) is provided with a second flange (22).

4. The high-efficiency vacuum pump pipeline structure according to claim 3 is characterized in that: The outer ring of the air outlet of the exhaust valve (3) is provided with a third flange (31), the butt holes of the third flange (31) and the second flange (22) are provided with bolts (32), and the outer side walls of the bolts (32) are screwed with nuts (33).

5. The high-efficiency vacuum pump pipeline structure according to claim 2 is characterized in that: An annular groove is provided on the front side of the gas outlet of the exhaust valve (3), and a sealing ring (34) is placed in the annular groove.

6. The high-efficiency vacuum pump pipeline structure according to claim 5 is characterized in that: The front side of the sealing ring (34) is in contact with the rear side of the bypass pipe (2), and the exhaust valve (3) is in communication with the bypass pipe (2).

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