A multi-cylinder vacuum pump for a vacuum glass furnace

Abstract

The present invention relates to the technical field of vacuum pumps, and specifically relates to a multi-cylinder vacuum pump for a vacuum glass furnace, which includes a driving mechanism, a transmission mechanism, and a vacuum pumping mechanism; the driving mechanism includes a motor, the transmission mechanism includes a power distribution box and a first assembly seat and a second assembly seat arranged in the power distribution box; there are two sets of vacuum pumping mechanisms, and each vacuum pumping mechanism includes a cylinder block, an end cover, a sealing seat, and a vacuum pumping assembly. A drain pipe is arranged at the bottom of the cylinder block, and an air inlet pipe, an exhaust pipe, a water inlet pipe, and an overflow pipe are arranged on the end cover. Both the air inlet pipe and the exhaust pipe are communicated with the internal space in the cylinder block. The vacuum pumping assembly includes a rotor and a plurality of blades circumferentially arranged outside the rotor, and the rotor is eccentrically arranged in the cylinder block. In the present invention, a single motor can simultaneously drive two air pumping mechanisms to perform vacuum pumping operations, improving the operation efficiency and having good sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pumps, and specifically to a multi-cylinder vacuum pump for a vacuum glass furnace. Background Art

[0002] A vacuum furnace is a heating device where workpieces (metals or multi-layered glass) are heated inside the furnace chamber, such as in processes like quenching and bonding. The workpieces complete multiple processes including heating, heat preservation and pressure maintenance, and cooling in a vacuum environment. To ensure the vacuum performance of the vacuum furnace, a basic principle needs to be followed in the structural design of the vacuum heat treatment furnace, that is, the furnace body should adopt airtight welding to minimize the chance of vacuum leakage. Components and accessories installed on the vacuum furnace body, such as water-cooled electrodes and thermocouple lead-out devices, also need to be designed with sealing structures. On the premise of ensuring the furnace body seal, a vacuum pump is required to extract the air inside the container during use. Existing vacuum pumps use a single motor to drive a single impeller to rotate for vacuum pumping. However, for a vacuum furnace, the drawback of this structure is low efficiency, and the water vapor or volatiles generated by the heating of the workpieces inside the furnace body are not easily extracted, thus affecting the forming quality of the workpieces. Therefore, it is often necessary to use two or more vacuum pumps to work simultaneously for vacuum pumping, resulting in an increase in the cost of the vacuum furnace. Summary of the Invention

[0003] The present invention provides a multi-cylinder vacuum pump for a vacuum glass furnace, where one motor drives two air extraction mechanisms simultaneously for vacuum pumping operations. While improving the operation efficiency, the positions of the intake pipes and exhaust pipes on both sides are symmetric left and right, the overall structure has a stable center, and the vibration amplitude is small.

[0004] To achieve the above object, the present invention provides the following technical solution: A multi-cylinder vacuum pump for a vacuum glass furnace, comprising a driving mechanism, a transmission mechanism, and a vacuum pumping mechanism;

[0005] The driving mechanism includes a motor;

[0006] The transmission mechanism includes a power distribution box and mounting seats I and II arranged inside the power distribution box;

[0007] There are two sets of the vacuum pumping mechanisms, which are respectively arranged on the left and right sides of the power distribution box. A single set of the vacuum pumping mechanism includes a cylinder block, an end cover, a sealing seat, and a vacuum pumping assembly. One end of the cylinder block is fixedly connected to the power distribution box, and the other end is detachably connected to the end cover by bolts. A drain pipe is arranged at the bottom of the cylinder block, and an intake pipe, an exhaust pipe, a water inlet pipe, and an overflow pipe are arranged on the end cover. The intake pipe and the exhaust pipe are both connected to the internal space inside the cylinder block. The vacuum pumping assembly includes a rotor and a plurality of blades circumferentially arranged outside the rotor, and the rotor is eccentrically arranged inside the cylinder block.

[0008] Further, the front inner wall of the power distribution box is rotatably connected to a first rotating shaft. One end of the first rotating shaft is in transmission connection with the output shaft of the driving motor. The other end of the first rotating shaft is coaxially fixed with a first bevel gear. The left inner wall of the power distribution box is rotatably connected to a second rotating shaft. The right end of the second rotating shaft is coaxially fixed with a second bevel gear. The left end of the second rotating shaft extends out of the power distribution box. The left side of the first mounting seat is rotatably connected to a third rotating shaft and a fourth rotating shaft. The left end of the third rotating shaft is coaxially fixed with a third bevel gear. The first bevel gear is in meshing transmission with the second bevel gear and the third bevel gear respectively. A first gear is coaxially fixed on the third rotating shaft. A second gear is coaxially fixed on the fourth rotating shaft. The first gear is in meshing transmission with the second gear. The right end of the fourth rotating shaft penetrates through the first mounting seat and is coaxially fixed with a third gear. The right side of the first mounting seat is rotatably connected to a fifth rotating shaft. A fourth gear is coaxially fixed on the fifth rotating shaft. The third gear is in meshing transmission with the fourth gear. The second mounting seat is rotatably connected to a sixth rotating shaft. The left end of the sixth rotating shaft is coaxially fixedly connected with a fifth gear. The fifth gear is in meshing transmission with the fourth gear. The right end of the sixth rotating shaft penetrates through the second mounting seat and extends out of the power distribution box. The axes of the second rotating shaft, the third rotating shaft, and the sixth rotating shaft coincide. The rotor in the vacuum pumping mechanism on the left side is coaxially fixed with the second rotating shaft. The rotor in the vacuum pumping mechanism on the right side is coaxially fixed with the sixth rotating shaft.

[0009] Further, the sealing seat is located inside the end cover. The sealing seat is provided with a shoulder. Grooves are provided on the inner walls of the cylinder block and the end cover close to each other. After the cylinder block and the end cover are butted, the two grooves form a fitting groove adapted to the shoulder. A radial sealing component and an axial sealing component are provided on the sealing seat. The radial sealing component is located between the cylinder block and the sealing seat to form a first seal. The axial sealing component is located between the end cover and the sealing seat to form a second seal. An air inlet hole communicating with the air inlet pipe is provided on the sealing seat. An air outlet hole communicating with the exhaust pipe is provided on the sealing seat. The water inlet pipe and the overflow pipe penetrate through the sealing seat and extend into the cylinder block, and are located outside the blades.

[0010] Further, the vacuum pumping mechanism further includes a gasket, and the gasket is located between the rotor and the sealing seat.

[0011] Further, a water inlet valve is provided on the water inlet pipe. A plugging cover is provided on the overflow pipe. A plugging component is provided on the drain pipe. The plugging component includes a plug cap, a connecting rod, and a plug block. The plug cap is threadedly connected to the pipe orifice of the drain pipe. One end of the connecting rod is located at the bottom of the plug cap. The other end of the connecting rod extends into the drain pipe. The plug block is located at the end of the connecting rod in the drain pipe. The upper side of the plug block is tangent to the inner wall of the cylinder block. The front side of the plug block contacts the bottom wall of the drain pipe.

[0012] Further, a counterweight is provided on the left side of the power distribution box.

[0013] Further, the radial sealing assembly and the axial sealing assembly include an annular support skeleton, an outer sealing ring, and two inner sealing rings. An arc-shaped groove is provided on the outer wall of the annular support skeleton, and two U-shaped grooves are provided on the inner wall. An inwardly buckled outer sealing lip is provided on each side of the arc-shaped groove, and two outwardly turned inner sealing lips are provided between the two U-shaped grooves. The outer sealing ring is located in the arc-shaped groove, and the two inwardly buckled outer sealing lips are located on both sides of the outer sealing ring. The inner sealing rings are located in the U-shaped grooves.

[0014] Further, a V-shaped groove is provided at the bottom of the U-shaped groove. The inner sealing ring is located in the U-shaped groove and contacts both sides of the V-shaped groove. The inner sealing ring is located outside the two inwardly buckled outer sealing lips in space. After deformation, the inner sealing ring obliquely presses upward on the annular support skeleton, and the extrusion force causes the inwardly buckled outer sealing lip to tightly hold the outer sealing ring, preventing the outer sealing ring from slipping out of the arc-shaped groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The multi-cylinder vacuum pump for a vacuum glass furnace disclosed in the present invention. In the present invention, the power of the driving mechanism drives the two vacuum pumping mechanisms to operate simultaneously through the transmission mechanism, realizing a dual-vacuum pumping mechanism with one motor, which improves the vacuum pumping efficiency;

[0017] In addition, the driving mechanism, the transmission mechanism, and the two vacuum pumping mechanisms together form a T-shaped structure. The driving mechanism is located at the front side, and the transmission mechanism and the two vacuum pumping mechanisms are both located at the rear side. This layout makes the center of gravity of the driving mechanism coincide with the center of gravity of the combination of the transmission mechanism and the two vacuum pumping mechanisms near the axis of the output shaft of the driving mechanism. A counterweight is provided on the left side of the power distribution box to adjust the center of gravity of the entire device to the axis of the output shaft, thereby reducing the vibration amplitude during the operation of the vacuum pump and improving the service life of the device;

[0018] In addition, after the power of the motor is distributed by the transmission mechanism, the rotors and impellers in the two vacuum pumping mechanisms rotate at the same speed and in the same direction, further reducing the vibration amplitude of the entire device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a perspective view of the multi-cylinder vacuum pump for a vacuum glass furnace in Embodiment 1;

[0020] Figure 2 is a cross-sectional view of the power distribution box in Embodiment 1;

[0021] Figure 3 is a structural schematic diagram of the vacuum pumping mechanism in Embodiment 1;

[0022] Figure 4 Cross-sectional view of the vacuum pumping mechanism in Embodiment 1;

[0023] Figure 5 Stereogram of the sealing seat in Embodiment 1;

[0024] Figure 6 Stereogram of the plugging component in Embodiment 1;

[0025] Figure 7 Top view of the multi-cylinder vacuum pump for a vacuum glass furnace in Embodiment 1;

[0026] Figure 8 is Figure 7 Cross-sectional view along the A-A direction;

[0027] Figure 9 is Figure 7 Cross-sectional view along the B-B direction;

[0028] Figure 10 Cross-sectional view of the radial sealing assembly and the axial sealing assembly in Embodiment 2.

[0029] In the figure: 100 - motor, 201 - power distribution box, 202 - first mounting seat, 203 - second mounting seat, 204 - maintenance cover plate, 205 - first rotating shaft, 206 - first bevel gear, 207 - second rotating shaft, 208 - second bevel gear, 209 - third rotating shaft, 210 - fourth rotating shaft, 211 - third bevel gear, 212 - first gear, 213 - second gear, 214 - third gear, 215 - fifth rotating shaft, 216 - fourth gear, 217 - sixth rotating shaft, 218 - fifth gear, 301 - cylinder block, 302 - end cover, 303 - sealing seat, 304 - drain pipe, 305 - intake pipe, 306 - exhaust pipe, 307 - water inlet pipe, 308 - overflow pipe, 309 - rotor, 310 - blade, 311 - shoulder, 312 - radial sealing assembly, 313 - axial sealing assembly, 314 - intake hole, 315 - exhaust hole, 316 - gasket, 317 - water inlet valve, 318 - plugging cover, 319 - plug cap, 320 - connecting rod, 321 - plug block, 322 - annular support frame, 323 - outer sealing ring, 324 - inner sealing ring, 325 - arc-shaped groove, 326 - U-shaped groove, 327 - inwardly buckled outer sealing lip, 328 - outwardly turned inner sealing lip, 329 - V-shaped groove. Detailed implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Embodiment 1

[0031] Please refer to Figure 1-9 , this embodiment provides a multi-cylinder vacuum pump for a vacuum glass furnace, which includes a driving mechanism, a transmission mechanism, and a vacuum pumping mechanism.

[0032] The driving mechanism includes a motor 100.

[0033] The transmission mechanism includes a power distribution box 201, a first mounting seat 202 and a second mounting seat 203 arranged in the power distribution box 201. A maintenance cover plate 204 is arranged at the upper end of the power distribution box 201. The front inner wall of the power distribution box 201 is rotatably connected to a first rotating shaft 205. The first rotating shaft 205 is connected to the output shaft of the driving motor 100 through a coupling. A first bevel gear 206 is coaxially fixed to the rear end of the first rotating shaft 205. The left inner wall of the power distribution box 201 is rotatably connected to a second rotating shaft 207. A second bevel gear 208 is coaxially fixed to the right end of the second rotating shaft 207. The left end of the second rotating shaft 207 extends to the outside of the power distribution box 201. The left side of the first mounting seat 202 is rotatably connected to a third rotating shaft 209 and a fourth rotating shaft 210. A third bevel gear 211 is coaxially fixed to the left end of the third rotating shaft 209. The first bevel gear 206 is meshed and driven with the second bevel gear 208 and the third bevel gear 211 respectively. A first gear 212 is coaxially fixed on the third rotating shaft 209. A second gear 213 is coaxially fixed on the fourth rotating shaft 210. The first gear 212 is meshed and driven with the second gear 213. The right end of the fourth rotating shaft 210 penetrates through the first mounting seat 202 and is coaxially fixed with a third gear 214. The right side of the first mounting seat 202 is rotatably connected to a fifth rotating shaft 215. A fourth gear 216 is coaxially fixed on the fifth rotating shaft 215. The third gear 214 is meshed and driven with the fourth gear 216. The second mounting seat 203 is rotatably connected to a sixth rotating shaft 217. A fifth gear 218 is coaxially fixed to the left end of the sixth rotating shaft 217. The fifth gear 218 is meshed and driven with the fourth gear 216. The right end of the sixth rotating shaft 217 penetrates through the second mounting seat 203 and extends to the outside of the power distribution box 201. The axes of the second rotating shaft 207, the third rotating shaft 209, and the sixth rotating shaft 217 coincide.

[0034] There are two sets of the vacuum pumping mechanisms, which are respectively arranged on the left and right sides of the power distribution box 201. A single set of vacuum pumping mechanism includes a cylinder block 301, an end cover 302, a sealing seat 303 and a vacuum pumping assembly. One end of the cylinder block 301 is fixedly connected to the power distribution box 201, and the other end is detachably connected to the end cover 302 by bolts. A drain pipe 304 is arranged at the bottom of the cylinder block 301. An air inlet pipe 305, an exhaust pipe 306, a water inlet pipe 307 and an overflow pipe 308 are arranged on the end cover 302. Both the air inlet pipe 305 and the exhaust pipe 306 are communicated with the internal space in the cylinder block 301. The vacuum pumping assembly includes a rotor 309 and a plurality of blades 310 circumferentially arranged outside the rotor 309. The rotor 309 in the vacuum pumping mechanism on the left side is coaxially fixed with the second rotating shaft 207, and the rotor 309 in the vacuum pumping mechanism on the right side is coaxially fixed with the sixth rotating shaft 217. The rotor 309 is eccentrically arranged in the cylinder block 301.

[0035] The sealing seat 303 is located inside the end cover 302. In this embodiment, the sealing seat 303 is made of rubber material. The sealing seat 303 is provided with a shoulder 311. Grooves are arranged on the inner walls of the cylinder block 301 and the end cover 302 that are close to each other. After the cylinder block 301 and the end cover 302 are butted, the two grooves form an assembly groove adapted to the shoulder 311. A radial sealing component 312 and an axial sealing component 313 are arranged on the sealing seat 303. The radial sealing component 312 is located between the cylinder block 301 and the sealing seat 303 to form the first seal, and the axial sealing component 313 is located between the end cover 302 and the sealing seat 303 to form the second seal. In this embodiment, the radial sealing component 312 and the axial sealing component 313 adopt O-ring seals. An air inlet hole 314 communicated with the air inlet pipe 305 is arranged on the sealing seat 303. An exhaust hole 315 communicated with the exhaust pipe 306 is arranged on the sealing seat 303. The water inlet pipe 307 and the overflow pipe 308 penetrate through the sealing seat 303 and then extend into the cylinder block 301 and are located outside the blades 310.

[0036] The vacuum pumping mechanism further includes a gasket 316. The gasket 316 is located between the rotor 309 and the sealing seat 303. The gasket 316 is provided with holes corresponding to the water inlet pipe 307, the overflow pipe 308, the air inlet hole 314 and the exhaust hole 315.

[0037] As a preferred embodiment of the present invention, a water inlet valve 317 is provided on the water inlet pipe 307, a plugging cover 318 is provided on the overflow pipe 308, and a plugging assembly is provided on the drain pipe 304. The plugging assembly includes a plug cap 319, a connecting rod 320, and a plug block 321. The plug cap 319 is threadedly connected to the pipe orifice of the drain pipe 304. One end of the connecting rod 320 is located at the bottom of the plug cap 319, and the other end of the connecting rod 320 extends into the drain pipe 304. The plug block 321 is located at one end of the connecting rod 320 within the drain pipe 304. The upper side surface of the plug block 321 is tangent to the inner wall of the cylinder block 301, and the front side surface of the plug block 321 is in contact with the bottom wall of the drain pipe 304.

[0038] The working principle of the multi-cylinder vacuum pump for a vacuum glass furnace provided in this embodiment is as follows:

[0039] The air inlet pipe 305 and the exhaust pipe 306 are respectively connected to the vacuum glass furnace. Before performing the vacuum pumping operation, the drain pipe 304 is connected to an external water supply pipe. After opening the water inlet valve 317 and the plugging cover 318, water is injected into the cylinder block 301. The water flows into the interior of the cylinder block through the water inlet pipe 307. When the water level reaches a predetermined height, the water flows out from the overflow pipe 308. When water flows out from the overflow pipe 308, the water injection is stopped. When no water flows out from the overflow pipe 308, the plugging cover 318 is screwed on.

[0040] The motor 100 is started. After the motor 100 is started, the first rotating shaft 205 drives the second rotating shaft 207 and the third rotating shaft 209 to rotate at the same speed and in different directions through the meshing transmission of the first bevel gear 206, the second bevel gear 208 and the third bevel gear 211. The third rotating shaft 209 drives the fourth rotating shaft 210 to rotate at the same speed and in different directions through the meshing transmission of the first gear 212 and the second gear 213. The fourth rotating shaft 210 drives the fifth rotating shaft 210 to rotate at the same speed and in different directions through the meshing transmission of the third gear 214 and the fourth gear 216. The rotating shaft 215 rotates at the same speed in different directions. The fifth rotating shaft 215 drives the sixth rotating shaft 217 to rotate at the same speed in different directions through the meshing transmission of the fourth gear 216 and the fifth gear 218. At this point, the second rotating shaft 207 and the sixth rotating shaft 217 rotate at the same speed and in the same direction, so that the rotors 309 on both sides rotate in the same direction. When the rotor 309 rotates in the cylinder body 301, the water in the cylinder body 301 is thrown to the surroundings of the cylinder body 301 by the blades 310, and the thrown water forms a closed space in the cylinder body 301. The inner surface of the upper part of the closed ring is tangent to the blade 310, and the inner surface of the lower part of the closed ring is in contact with the top of the blade 310. At this time, a crescent-shaped space is formed between the blades 310, and this space is divided into a number of small cavities equal to the number of blades 310 by the blades 310. If the upper part of the blade 310 is 0° as the starting point, the volume of the small cavity changes from small to large when the blade 310 rotates 180° before, and is connected to the air inlet 314. At this time, the gas is sucked in from the air inlet pipe 305. When the air intake is finished, the small cavity is isolated from the air inlet 314; when the blade 310 continues to rotate, the small cavity becomes smaller, so that the gas is compressed; when the small cavity is connected to the exhaust hole 315, the gas is discharged from the exhaust hole 315. The total cross-sectional area of the exhaust hole 315 is smaller than the cross-sectional area of the air inlet 314, so that the gas is easier to discharge. The gasket 316 can prevent the rotor 309 from contacting the sealing seat 303, and prevent the sealing seat 303 from rubbing against the adjacent rotor 309, thereby increasing the service life. After use, turn off the motor 100, unscrew the plug cap 319, take out the connecting rod 320, and release the water in the cylinder 301. Example 2

[0041] The structure of this embodiment is basically the same as that of the first embodiment, except that: Figure 10, the radial seal assembly 312 and the axial seal assembly 313 have the same structure, specifically including an annular support skeleton 322, an outer sealing ring 323 and two inner sealing rings 324. In this embodiment, the annular support skeleton 322 is made of rubber. An arc-shaped groove 325 is provided on the outer wall of the annular support skeleton 322, and two U-shaped grooves 326 are provided on the inner wall. An inwardly buckled outer sealing lip 327 is provided on each side of the arc-shaped groove 325, and two outwardly turned inner sealing lips 328 are provided between the two U-shaped grooves 326. A V-shaped groove 329 is provided at the bottom of the U-shaped groove 326. The outer sealing ring 323 is located in the arc-shaped groove 325, and the two inwardly buckled outer sealing lips 327 are located on both sides of the outer sealing ring 323. The inner sealing ring 324 is located in the U-shaped groove 326 and contacts both sides of the V-shaped groove 329. The inner sealing ring 324 is located outside the two inwardly buckled outer sealing lips 327 in space. After the inner sealing ring 324 deforms, it obliquely upwardly presses the annular support skeleton 322, and the pressing force causes the inwardly buckled outer sealing lip 327 to tightly hold the outer sealing ring 323, preventing the outer sealing ring 323 from slipping out of the arc-shaped groove 325.

[0042] When the vacuum pump is used in combination with a vacuum glass furnace, since the air temperature in the vacuum glass furnace is relatively high, the temperature of the air entering the vacuum pumping mechanism increases. In order to achieve the sealing function of the sealing seat and at the same time to overcome the problem of thermal expansion of the sealing seat, a small gap is preset between the radial and axial directions of the sealing seat and the cylinder block and the end cover.

[0043] However, thermal expansion is a dynamically changing process. When the expansion deformation amount of the sealing seat does not completely fill the gap, the sealing seat is a component that undergoes small displacements, and it is necessary to rely on the radial seal assembly and the axial seal assembly to achieve sealing.

[0044] In the long-term high-temperature environment, the aging efficiency of the O-ring in Embodiment 1 gradually becomes faster and the sealing effect deteriorates. In order to delay the sealing failure cycle, in this embodiment, the radial seal assembly and the axial seal assembly are further improved. The outer sealing ring 323 and the inner sealing ring 324 respectively realize the main sealing areas between two components, and the inwardly buckled outer sealing lips 327 and the outwardly turned inner sealing lips 328 form the auxiliary sealing areas of the two components. Especially when the sealing ring undergoes displacement changes, after the inner sealing ring 324 deforms, it generates an obliquely upward pressing force on the annular support skeleton 322, causing the inwardly buckled outer sealing lip 327 to tightly hold the outer sealing ring 323, preventing the outer sealing ring 323 from slipping out of the arc-shaped groove 325, and ensuring the sealing performance of the vacuum pumping mechanism.

[0045] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A multi-cylinder vacuum pump for a vacuum glass furnace, comprising a driving mechanism, a transmission mechanism, and a vacuum pumping mechanism; the driving mechanism includes a motor; the transmission mechanism includes a power distribution box and a first mounting seat and a second mounting seat arranged in the power distribution box; the vacuum pumping mechanism has two sets, which are respectively arranged on the left and right sides of the power distribution box. A single set of vacuum pumping mechanism includes a cylinder body, an end cover, a sealing seat, and a vacuum pumping component. One end of the cylinder body is fixedly connected to the power distribution box, and the other end is detachably connected to the end cover by bolts. A drain pipe is arranged at the bottom of the cylinder body, and an air inlet pipe, an exhaust pipe, a water inlet pipe, and an overflow pipe are arranged on the end cover. The air inlet pipe and the exhaust pipe are both communicated with the internal space in the cylinder body. The vacuum pumping component includes a rotor and a plurality of blades circumferentially arranged outside the rotor. The rotor is eccentrically arranged in the cylinder body; the front inner wall of the power distribution box is rotatably connected to a first rotating shaft, one end of the first rotating shaft is in transmission connection with the output shaft of the driving motor, and the other end of the first rotating shaft is coaxially fixed with a first bevel gear. The left inner wall of the power distribution box is rotatably connected to a second rotating shaft, the right end of the second rotating shaft is coaxially fixed with a second bevel gear, and the left end of the second rotating shaft extends outside the power distribution box. The left side of the first mounting seat is rotatably connected to a third rotating shaft and a fourth rotating shaft. The left end of the third rotating shaft is coaxially fixed with a third bevel gear. The first bevel gear is in meshing transmission with the second bevel gear and the third bevel gear respectively. A first gear is coaxially fixed on the third rotating shaft, and a second gear is coaxially fixed on the fourth rotating shaft. The first gear is in meshing transmission with the second gear. The right end of the fourth rotating shaft passes through the first mounting seat and is coaxially fixed with a third gear. The right side of the first mounting seat is rotatably connected to a fifth rotating shaft, and a fourth gear is coaxially fixed on the fifth rotating shaft. The third gear is in meshing transmission with the fourth gear. The second mounting seat is rotatably connected to a sixth rotating shaft, and the left end of the sixth rotating shaft is coaxially fixed and connected with a fifth gear. The fifth gear is in meshing transmission with the fourth gear. The right end of the sixth rotating shaft passes through the second mounting seat and extends outside the power distribution box. The axes of the second rotating shaft, the third rotating shaft, and the sixth rotating shaft coincide. The rotor in the vacuum pumping mechanism on the left side is coaxially fixed with the second rotating shaft, and the rotor in the vacuum pumping mechanism on the right side is coaxially fixed with the sixth rotating shaft; the sealing seat is located in the end cover, the sealing seat is provided with a shoulder, and grooves are arranged on the inner walls of the cylinder body and the end cover close to each other. After the cylinder body and the end cover are butted, the two grooves form a mounting groove adapted to the shoulder. A radial sealing component and an axial sealing component are arranged on the sealing seat. The radial sealing component is located between the cylinder body and the sealing seat to form a first seal, and the axial sealing component is located between the end cover and the sealing seat to form a second seal. An air inlet hole communicated with the air inlet pipe is arranged on the sealing seat, and an exhaust hole communicated with the exhaust pipe is arranged on the sealing seat. The water inlet pipe and the overflow pipe pass through the sealing seat and extend into the cylinder body and are located outside the blades; It is characterized in that: The radial sealing assembly and the axial sealing assembly include an annular support framework, an outer sealing ring, and two inner sealing rings. An arc-shaped groove is provided on the outer wall of the annular support framework, and two U-shaped grooves are provided on the inner wall. An inwardly buckled outer sealing lip is provided on each side of the arc-shaped groove, and two outwardly turned inner sealing lips are provided between the two U-shaped grooves. The outer sealing ring is located in the arc-shaped groove, and the two inwardly buckled outer sealing lips are located on both sides of the outer sealing ring. The inner sealing rings are located in the U-shaped grooves. A V-shaped groove is provided at the bottom of the U-shaped groove. The inner sealing rings are located in the U-shaped grooves and are in contact with both sides of the V-shaped groove. The inner sealing rings are located outside the two inwardly buckled outer sealing lips in space. After deformation, the inner sealing rings are obliquely upwardly pressed against the annular support framework, and the pressing force causes the inwardly buckled outer sealing lips to tightly hold the outer sealing ring, preventing the outer sealing ring from coming out of the arc-shaped groove.

2. The multi-cylinder vacuum pump for a vacuum glass furnace according to claim 1, wherein: The vacuum pumping mechanism further includes a gasket, and the gasket is located between the rotor and the sealing seat.

3. The multi-cylinder vacuum pump for a vacuum glass furnace according to claim 1, characterized in that: An inlet valve is provided on the water inlet pipe, a plugging cover is provided on the overflow water pipe, and a plugging assembly is provided on the drain pipe. The plugging assembly includes a plug cap, a connecting rod, and a plug block. The plug cap is threadedly connected to the pipe orifice of the drain pipe. One end of the connecting rod is located at the bottom of the plug cap, and the other end of the connecting rod extends into the drain pipe. The plug block is located at the end of the connecting rod in the drain pipe. The upper side surface of the plug block is tangent to the inner wall of the cylinder block, and the front side surface of the plug block is in contact with the bottom wall of the drain pipe.

4. The multi-cylinder vacuum pump for a vacuum glass furnace according to claim 1, characterized in that: A counterweight is provided on the left side of the power distribution box.

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