Roots vacuum pump sealing structure

Abstract

The utility model provides a Roots vacuum pump sealing structure, which relates to the technical field of vacuum pumps and comprises a mounting pump body, an auxiliary exhaust component mounted in the mounting pump body, and pressure adjusting components mounted at the left end and the right end of the auxiliary exhaust component. Under the cooperation of the auxiliary exhaust assembly and the pressure adjusting assembly, when the exhaust valve plate is damaged and the air tightness detector detects that the exhaust air tightness is reduced, secondary exhaust adjustment is effectively formed through the structure, so that the whole device accurately controls and monitors the exhaust pressure of the vacuum pump, the air tightness is improved, and the service life of the vacuum pump is prolonged. And then the airtightness detector is in close contact with the surfaces of the exhaust communicating pipe plate and the two-way exhaust groove frame through the detection end, the airtightness of the exhaust system can be monitored in real time, it is ensured that no leakage exists, then the top of the exhaust communicating pipe plate communicates with a communicating exhaust pipe, and exhaust gas is guided to a designated exhaust point.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum pumps, in particular to a sealing structure of a Roots vacuum pump. Background Art

[0002] Roots vacuum pump is a variable displacement vacuum pump with two blade-shaped rotors rotating synchronously in opposite directions. There is a small gap between the rotors and between the rotors and the inner wall of the pump casing, but they do not touch each other. Roots vacuum pump has been tested in long-term operation in devices such as petroleum, chemical, plastic, pesticide, turbine rotor dynamic balance, and aerospace space simulation, so it should be vigorously promoted and applied in China. It is also widely used in industries such as petroleum, chemical, metallurgy, and textile.

[0003] However, during the use of the existing Roots vacuum pump, when the internal temperature and pressure are too high and need to be exhausted, the exhaust operation is mostly performed actively through the exhaust valve plate. However, during the exhaust process, the exhaust valve plate is in a high temperature and high pressure environment for a long time, which can easily cause the contact surface of the exhaust valve plate to wear, affecting the overall sealing performance, resulting in reduced exhaust efficiency or air leakage. Therefore, it is necessary to propose a new Roots vacuum pump sealing structure. Utility Model Content

[0004] The utility model aims to solve the problem that, during the use of a Roots vacuum pump, when the internal temperature and pressure are too high and exhaust is required, active exhaust operation is mostly performed through an exhaust valve plate. However, during the exhaust process, the exhaust valve plate is in a high temperature and high pressure environment for a long time, which easily causes the contact surface of the exhaust valve plate to wear, affects the overall sealing performance, and leads to reduced exhaust efficiency or air leakage. A sealing structure for a Roots vacuum pump is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a Roots vacuum pump sealing structure, comprising a mounting pump body, the mounting pump body is installed at the exhaust end of the vacuum pump, an auxiliary exhaust component is installed inside the mounting pump body, and pressure regulating components are installed at the left and right ends of the auxiliary exhaust component;

[0006] The auxiliary exhaust component includes a two-way slot frame, magnetic track slots are installed on both sides of the frame body of the two-way slot frame, magnetic spheres are slidably installed inside the magnetic track slots, a pressure rod column is arranged at the bottom of the magnetic sphere, the bottom of the pressure rod column is fastened with a pressure spring damper, the bottom end of the pressure spring damper is fastened with an exhaust pressure plate, the bottom end surfaces of both sides of the two-way slot frame are connected with exhaust connecting tube sheets, the side wall surface of the exhaust connecting tube sheet is installed with an airtight detector, the airtight detector is installed through the detection end and the exhaust connecting tube sheet and the two-way slot frame surface detection, and the top of the exhaust connecting tube sheet is connected with a connecting pipe.

[0007] Preferably, the pressure adjustment assembly includes a pressure guide rod, the side end of the pressure guide rod is connected to an adjustment frame through a connecting plate, sliding grooves are provided on both sides of the side wall surface of the adjustment frame, a sliding spring is slidingly connected inside the sliding groove, and a rotating seat is hinged at the side end of the sliding spring, and the rotating seat is installed on the two side surfaces of the outer wall of the two-way slot frame.

[0008] Preferably, the side end of the pressure guide rod is fastened with a pressure rod, the side end of the pressure rod is fastened with a pressure elastic piston, the side end of the pressure elastic piston passes through a two-way slot frame, and the side end of the pressure guide rod is installed with a pressing end.

[0009] Preferably, a mounting groove is provided at a side end of the mounting pump body, and two ends of the interior of the mounting groove are fastened with docking protrusions.

[0010] Preferably, an exhaust valve end is installed at the central end of the installation groove, and a side end of the exhaust valve end penetrates the installation pump body and is connected to the exhaust connecting tube plate through the exhaust control valve.

[0011] Preferably, a guide valve is installed on the outer peripheral side of the top end of the connecting exhaust pipe, and an exhaust pipe is installed on the side end of the guide valve.

[0012] Preferably, a connecting pin is installed on the side end of the mounting pump body, and the connecting pin and the docking protrusion are plugged and fixedly connected with the exhaust end of the vacuum pump.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, when the exhaust valve plate is damaged, the pressure elastic piston is pressed downward by the auxiliary exhaust assembly, and gas is injected into the two-way slot frame to form air pressure expansion inside the two-way slot frame, so that the magnetic sphere can slide freely in the magnetic track groove under the action of the magnetic field by using the formed air pressure expansion force, and a pressure rod column is arranged at the bottom of the magnetic sphere, and the bottom of the pressure rod column is connected to the pressure spring damping, and the bottom end of the pressure spring damping is connected to the exhaust pressure plate. The pressure spring damping can absorb the impact force during the exhaust process, ensure the exhaust process is stable, and adjust the exhaust pressure plate through the spring force. The position of the magnetic sphere can be adjusted to change the stress state of the exhaust pressure plate, thereby adjusting the exhaust pressure. After that, the airtightness detector is closely contacted with the exhaust connecting tube plate and the surface of the two-way row slot frame through the detection end, so as to monitor the airtightness of the exhaust system in real time to ensure that there is no leakage. Then, the top of the exhaust connecting tube plate is connected to the connecting pipe to guide the exhaust gas to the designated discharge point. The overall structure is effective. When the exhaust valve plate is damaged and the airtightness detector detects that the exhaust airtightness is reduced, the secondary exhaust adjustment is formed through the above structure, so that the overall device can accurately control and monitor the exhaust pressure of the vacuum pump and improve the airtightness.

[0015] 2. In the utility model, with the cooperation of the pressure regulating assembly, according to the connection linkage formed by the pressure guide rod, the regulating frame, the slide groove, the sliding spring, the rotating seat, the pressure rod, and the pressure elastic piston, the position of the pressure guide rod can be manually adjusted by operating the pressing end, so that the sliding spring is forced to slide inside the slide groove, and the pressure rod and the pressure elastic piston are adjusted downward, thereby affecting the exhaust pressure, realizing accurate adjustment of the exhaust pressure, and further ensuring the effectiveness of the operation of the auxiliary exhaust assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the main structure of a Roots vacuum pump sealing structure is provided for the utility model;

[0017] Figure 2 The utility model provides a schematic diagram of the internal cross-sectional structure of a Roots vacuum pump sealing structure;

[0018] Figure 3 A schematic diagram of the structure of a pressure regulating component of a Roots vacuum pump sealing structure is provided for the utility model;

[0019] Figure 4 The utility model provides a schematic structural diagram of an auxiliary exhaust component of a Roots vacuum pump sealing structure.

[0020] Legend: 1. Install the pump body; 2. Connect the pin; 3. Install the groove; 4. Docking protrusion; 5. Exhaust valve end; 6. Press end; 7. Auxiliary exhaust assembly; 71. Two-way slot rack; 72. Magnetic track slot; 73. Magnetic sphere; 74. Pressure rod column; 75. Pressure spring damping; 76. Exhaust pressure plate; 8. Pressure regulating assembly; 81. Pressure guide rod; 82. Slide groove; 83. Sliding spring; 84. Rotating seat; 85. Pressure rod; 86. Pressure elastic piston; 9. Exhaust connecting pipe plate; 10. Airtight detector; 11. Connecting pipe; 12. Guide valve; 13. Exhaust pipe. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Example 1

[0024] like Figure 1-Figure 4 As shown, the utility model provides a technical solution: a Roots vacuum pump sealing structure, including a pump body 1, the pump body 1 is installed at the exhaust end of the vacuum pump, an auxiliary exhaust assembly 7 is installed inside the pump body 1, and pressure regulating assemblies 8 are installed at the left and right ends of the auxiliary exhaust assembly 7; the auxiliary exhaust assembly 7 includes a two-way slot frame 71, magnetic track grooves 72 are installed on both sides of the frame of the two-way slot frame 71, a magnetic sphere 73 is slidably installed inside the magnetic track groove 72, a pressure rod column 74 is arranged at the bottom of the magnetic sphere 73, a pressure spring damper 75 is fastened to the bottom of the pressure rod column 74, an exhaust pressure plate 76 is fastened to the bottom end of the pressure spring damper 75, an exhaust connecting pipe sheet 9 is connected to the bottom end surface of the two sides of the two-way slot frame 71, and a gas connecting pipe sheet 9 is installed on the side wall surface of the exhaust connecting pipe sheet 9 The airtight detector 10 is installed through the detection end and the exhaust connecting tube plate 9 and the two-way slot frame 71 surface detection. The top of the exhaust connecting tube plate 9 is connected with a connecting pipe 11. The pressure regulating assembly 8 includes a pressure guide rod 81. The side end of the pressure guide rod 81 is connected to the adjustment frame through a connecting piece. The side wall surface of the adjustment frame is provided with a slide groove 82 on both sides. The inside of the slide groove 82 is slidably connected with a sliding spring 83. The side end of the sliding spring 83 is hinged with a rotating seat 84. The rotating seat 84 is installed on the two side surfaces of the outer wall of the two-way slot frame 71. The side end of the pressure guide rod 81 is fastened with a pressure rod 85. The side end of the pressure rod 85 is fastened with a pressure elastic piston 86. The side end of the pressure elastic piston 86 penetrates the two-way slot frame 71. The side end of the pressure guide rod 81 is installed with a pressing end 6.

[0025] In this embodiment, through the cooperation of the pressure guide rod 81, the adjustment frame, the slide groove 82, the sliding spring 83, the rotating seat 84, the pressure rod 85, and the pressure elastic piston 86, when the exhaust valve plate is damaged, the position of the pressure guide rod 81 can be manually adjusted by operating the pressing end 6, so that the sliding spring 83 is forced to slide inside the slide groove 82, and the pressure rod 85 and the pressure elastic piston 86 are adjusted downward, thereby affecting the exhaust pressure and realizing precise adjustment of the exhaust pressure. Then, the magnetic track grooves 72 are installed on both sides of the two-way groove frame 71, and the magnetic ball 73 is slidably installed inside the magnetic track groove 72. When the pressure elastic piston 86 is pressed downward, gas is injected into the two-way groove frame 71, so that the gas forms air pressure expansion inside the two-way groove frame 71, and the air pressure expansion force formed is used to make the magnetic ball 73 slide freely in the magnetic track groove 72 under the action of the magnetic field, and a pressure-resistant member is set at the bottom of the magnetic ball 73. The rod column 74 is pressed against the bottom of the rod column 74 and connected to a pressure spring damper 75, and the bottom end of the pressure spring damper 75 is further connected to the exhaust pressure plate 76. The pressure spring damper 75 can absorb the impact force during the exhaust process to ensure a smooth exhaust process, and adjust the position of the exhaust pressure plate 76 by spring force, thereby controlling the exhaust pressure, that is, by adjusting the position of the magnetic sphere 73, the stress state of the exhaust pressure plate 76 is changed, thereby adjusting the exhaust pressure, and then the airtightness detector 10 is closely contacted with the exhaust connecting tube plate 9 and the surface of the two-way groove rack 71 through the detection end, so as to monitor the airtightness of the exhaust system in real time to ensure that there is no leakage, and then the top of the exhaust connecting tube plate 9 is connected to the connecting pipe 11 to guide the exhaust gas to the designated discharge point. The overall effective exhaust valve plate is damaged, and when the airtightness detector 10 detects that the exhaust airtightness is reduced, the above structure is used to form a secondary exhaust adjustment, so that the overall device can accurately control and monitor the exhaust pressure of the vacuum pump and improve the airtightness.

[0026] Example 2

[0027] like Figure 1-Figure 4 As shown, a mounting groove 3 is provided at the side end of the mounting pump body 1, and docking protrusions 4 are fastened at both ends of the interior of the mounting groove 3, an exhaust valve end 5 is installed at the center end of the mounting groove 3, and the side end of the exhaust valve end 5 penetrates the mounting pump body 1 and is connected with the exhaust connecting tube plate 9 through the exhaust control valve, a guide valve 12 is installed on the outer peripheral side of the top end of the connecting exhaust pipe 11, and an exhaust pipe 13 is installed at the side end of the guide valve 12, and a connecting pin 2 is installed at the side end of the mounting pump body 1, and the connecting pin 2 and the docking protrusion 4 are plugged and fixedly connected with the exhaust end of the vacuum pump.

[0028] In this embodiment, the connecting pin 2 is used to plug the corresponding holes of the installation pump body 1 and the exhaust end of the vacuum pump to achieve a preliminary fixed connection. Then, based on the plug-in fixation of the connecting pin 2, the docking protrusions 4 at both ends of the installation groove 3 are tightly plugged into the corresponding grooves or protrusions of the exhaust end of the vacuum pump to further strengthen the connection between the installation pump body 1 and the exhaust end of the vacuum pump to ensure that the connection between the two is firm and well sealed. After that, the exhaust valve end 5 is ensured to be smoothly docked with the exhaust channel inside the vacuum pump, and effective connection with the connecting drain pipe 11 is achieved through the exhaust control valve and the exhaust connecting pipe plate 9, and a guide valve 12 is installed on the outer peripheral side of the top end of the connecting drain pipe 11 to guide and control the exhaust flow direction. Then, the exhaust pipe 13 is used to guide the exhaust gas to the designated discharge point or treatment equipment.

[0029] The working principle of this embodiment is as follows: by using the connecting pin 2 and the docking protrusion 4, the corresponding groove or protrusion of the installation pump body 1 and the exhaust end of the vacuum pump are tightly plugged, and the connection between the installation pump body 1 and the exhaust end of the vacuum pump is further strengthened. Then, the exhaust valve end 5 is smoothly docked with the exhaust channel inside the vacuum pump, and the exhaust control valve and the exhaust connecting pipe plate 9 are effectively connected with the connecting exhaust pipe 11. When the exhaust valve plate is damaged, the position of the pressure guide rod 81 can be manually adjusted by operating the pressing end 6, so that the sliding spring 83 is forced to move inside the slide groove 82. The pressure rod 85 and the pressure elastic piston 86 are slidably mounted on the two sides of the two-way slot frame 71, and the magnetic ball 73 is slidably mounted inside the magnetic track groove 72, so that when the pressure elastic piston 86 is pressed downward, gas is injected into the two-way slot frame 71, so that the gas forms air pressure expansion inside the two-way slot frame 71, and the air pressure expansion force formed is used to make the magnetic ball 73 in the magnetic track groove under the action of the magnetic field. The magnetic sphere 73 is freely slidable in the inner chamber 72, and a pressure rod column 74 is arranged at the bottom of the magnetic sphere 73, and the bottom of the pressure rod column 74 is connected to a pressure spring damper 75, and the bottom end of the pressure spring damper 75 is connected to an exhaust pressure plate 76. The pressure spring damper 75 can absorb the impact force during the exhaust process to ensure a smooth exhaust process, and adjust the position of the exhaust pressure plate 76 by the spring force, thereby controlling the exhaust pressure, that is, by adjusting the position of the magnetic sphere 73, the force state of the exhaust pressure plate 76 is changed, thereby adjusting the exhaust pressure, and then the airtight detector 10 is connected to the exhaust through the detection end. The surfaces of the tube plate 9 and the two-way groove rack 71 are in close contact, and the air tightness of the exhaust system can be monitored in real time to ensure that there is no leakage. Then the top of the exhaust connecting tube plate 9 is connected to the connecting pipe 11, and with the cooperation of the guide valve 12, the exhaust flow direction is guided and controlled, and then the exhaust pipe 13 is used to guide the exhaust gas to the designated discharge point. When the exhaust valve plate is damaged and the airtightness detector 10 detects that the exhaust airtightness is reduced, the above structure is used to form a secondary exhaust adjustment, so that the overall device can accurately control and monitor the exhaust pressure of the vacuum pump and improve the airtightness.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A Roots vacuum pump sealing structure, characterized in that: It comprises an installation pump body (1), the installation pump body (1) is installed at the exhaust end of a vacuum pump, an auxiliary exhaust component (7) is installed inside the installation pump body (1), and pressure regulating components (8) are installed at the left and right ends of the auxiliary exhaust component (7); The auxiliary exhaust assembly (7) comprises a two-way slot rack (71), magnetic track slots (72) are installed on both sides of the frame body of the two-way slot rack (71), a magnetic sphere (73) is slidably installed inside the magnetic track slot (72), a pressure rod column (74) is arranged at the bottom of the magnetic sphere (73), a pressure spring damper (75) is fastened to the bottom of the pressure rod column (74), an exhaust pressure plate (76) is fastened to the bottom end of the pressure spring damper (75), the bottom end surfaces of both sides of the two-way slot rack (71) are connected to the exhaust connecting tube sheet (9), an airtightness detector (10) is installed on the side wall surface of the exhaust connecting tube sheet (9), the airtightness detector (10) is installed through the detection end and the exhaust connecting tube sheet (9) and the two-way slot rack (71) surface detection, and the top of the exhaust connecting tube sheet (9) is connected to the connecting pipe (11).

2. The sealing structure of a Roots vacuum pump according to claim 1, characterized in that: The pressure regulating assembly (8) comprises a pressure guide rod (81), the side end of the pressure guide rod (81) is connected to an adjusting frame through a connecting piece, and the side wall surface of the adjusting frame is provided with a slide groove (82) on both sides, and the inside of the slide groove (82) is slidably connected with a sliding spring (83), and the side end of the sliding spring (83) is hinged with a rotating seat (84), and the rotating seat (84) is installed on the two side surfaces of the outer wall of the bidirectional slot rack (71).

3. The sealing structure of a Roots vacuum pump according to claim 2, characterized in that: The side end of the pressure guide rod (81) is fastened to a pressure rod (85), and the side end of the pressure rod (85) is fastened to a pressure elastic piston (86). The side end of the pressure elastic piston (86) passes through the two-way slot frame (71), and the side end of the pressure guide rod (81) is installed with a pressing end (6).

4. The sealing structure of a Roots vacuum pump according to claim 1, characterized in that: A mounting groove (3) is provided at the side end of the mounting pump body (1), and two ends of the interior of the mounting groove (3) are fastened with docking protrusions (4).

5. The sealing structure of a Roots vacuum pump according to claim 4, characterized in that: An exhaust valve end (5) is installed at the central end of the installation groove (3), and a side end of the exhaust valve end (5) penetrates the installation pump body (1) and is connected to the exhaust connecting tube plate (9) through the exhaust control valve.

6. The sealing structure of a Roots vacuum pump according to claim 1, characterized in that: A guide valve (12) is installed on the outer peripheral side of the top end of the connecting exhaust pipe (11), and an exhaust pipe (13) is installed on the side end of the guide valve (12).

7. The sealing structure of a Roots vacuum pump according to claim 1, characterized in that: A connecting pin (2) is installed on the side end of the installation pump body (1), and the connecting pin (2) and the docking protrusion (4) are plugged and fixedly connected to the exhaust end of the vacuum pump.

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