Vacuumizing device for ultra-high-speed low-vacuum pipeline

Abstract

The invention relates to a vacuumizing device for an ultra-high-speed low-vacuum pipeline, and relates to the technical field of vacuumizing devices, the vacuumizing device is used for vacuumizing a running pipeline and comprises a vacuum pump and a filtering mechanism, and the filtering mechanism comprises a filtering box, a filtering assembly, an ash removing assembly and a direction adjusting assembly; the filtering assembly comprises a moving track, a circulating pipeline and a filtering ball, the dust removing assembly comprises an air blowing part and a collecting part, the direction adjusting assembly comprises an adjusting iron ring and an adjusting magnetic ring, the filtering ball circularly sliding in the moving track and the circulating pipeline can filter dust, and the air blowing part and the collecting part are matched to blow the filtering ball. And the adjusting magnetic ring drives the adjusting iron ring to rotate the filtering ball, so that the blowing and dust cleaning effects of the filtering ball are better, and the filtering mechanism performs filtering in a manner of self-recovery of the filtering capacity, so that the filtering mechanism is not easy to block. The driving pipeline has the effect that the driving pipeline is not prone to being blocked due to a large amount of dust during vacuumizing.

Description

Technical Field

[0001] This application relates to the technical field of vacuum pumping devices, and in particular to a vacuum pumping device for ultra-high-speed and low-vacuum pipelines. Background Art

[0002] A maglev train is an orbital train with a speed of over 400 kilometers per hour. Its driving resistance mainly comes from the air. In order to further reduce the driving resistance of the maglev train, the maglev train will run in a low-vacuum pipeline to reduce the resistance from the air.

[0003] The driving pipeline of the maglev train is mainly transformed into a low-vacuum state by means of vacuum pumping, so that the maglev train can run at ultra-high speed. Due to the large space of the driving pipeline of the maglev train, the dust content in the driving pipeline is also relatively high. The filtering means relying on the filter element inside the vacuum pump and setting a filter screen in the vacuum pumping pipeline are difficult to meet the dust filtering requirements. After filtering a large amount of dust, the filter element and the filter screen will become blocked, making it difficult for the vacuum pump to continuously pump the driving pipeline to a vacuum, and thus it is difficult to make the driving pipeline of the maglev train reach a low-vacuum state. Summary of the Invention

[0004] In order to prevent the driving pipeline from being blocked by a large amount of dust during vacuum pumping, this application provides a vacuum pumping device for ultra-high-speed and low-vacuum pipelines.

[0005] A vacuum pumping device for ultra-high-speed and low-vacuum pipelines provided by this application adopts the following technical solutions: A vacuum pumping device for ultra-high-speed and low-vacuum pipelines, which is used to pump the driving pipeline to a vacuum, includes a vacuum pump and a filtering mechanism. The filtering mechanism has the function of self-recovery filtering ability. The filtering mechanism includes a filtering box, a filtering component, a dust cleaning component, an azimuth adjustment component, and a transmission component; The vacuum pump is connected to a vacuum pumping pipeline, and the vacuum pumping pipeline and the driving pipeline are respectively connected to the two opposite sides of the filtering box; The filtering component includes a moving track, a circulating pipeline, and filtering balls; The moving track is arranged inside the filtering box and is coiled in multiple layers. The circulating pipeline is arranged outside the filtering box. Both ends of the circulating pipeline are connected to the filtering box. The two ends of the circulating pipeline are respectively arranged opposite to the two ends of the moving track. A plurality of filtering balls are provided and are slidably arranged one by one inside the moving track and the circulating pipeline. Adjacent two filtering balls are in contact with each other. The filtering balls are used to filter dust; A spiral conveyor rod is rotatably arranged inside one end of the circulating pipeline. The spiral conveyor rod is connected to a motor. The spiral conveyor rod is used to drive the filtering balls to move inside the circulating pipeline, so that all the filtering balls circulate and slide inside the moving track and the circulating pipeline; The dust cleaning assembly includes a blowing part and a collecting part. There are multiple blowing parts. The multiple blowing parts and the collecting part are oppositely arranged on both sides of the circulation pipeline. Each blowing part is connected with an air extraction pipe. All the air extraction pipes are commonly connected to a connecting pipe, and the connecting pipe is connected to a vacuum extraction pipeline. The blowing part is used to suck the air flow in the vacuum extraction pipeline to blow the dust on the filtering balls, and the collecting part is used to collect the dust blown from the filtering balls. There are multiple orientation adjustment assemblies, which are respectively located between two adjacent blowing parts. The orientation adjustment assemblies are arranged on the circulation pipeline and are used to rotate the filtering balls so that different blowing parts can face different sides of the filtering balls. The transmission assembly is connected to the output shaft of the blowing part and the motor, and is also connected to the output shaft of the orientation adjustment assembly and the motor. The transmission assembly is used to drive the blowing part to circulate for air extraction and blowing by means of the driving force of the motor output shaft, and the transmission assembly is used to drive the orientation adjustment assembly to rotate the filtering balls by means of the driving force of the motor output shaft.

[0006] Optionally, the blowing part includes a blowing cylinder, a blowing piston and a push rod. The blowing cylinder is communicated with a blowing pipe, and the blowing pipe is communicated on the circulation pipeline. The end of the air extraction pipe far from the connecting pipe is communicated with the blowing cylinder. The blowing piston is hermetically and slidably arranged in the blowing cylinder, and the push rod is connected to the blowing piston. A first one-way valve is arranged on the blowing pipe, and the conduction direction of the first one-way valve is from the inside of the blowing cylinder to the inside of the circulation pipeline. A second one-way valve is arranged on the air extraction pipe, and the conduction direction of the second one-way valve is from the inside of the connecting pipe to the inside of the blowing cylinder.

[0007] Optionally, the collecting part includes collecting pipes and a collecting box. There are multiple collecting pipes, and all of them are communicated on the circulation pipeline. The collecting pipes and the blowing pipes are arranged in one-to-one correspondence and oppositely, and the collecting box is communicated with all the collecting pipes.

[0008] Optionally, a check valve is hinged at the connection between the collecting box and each collecting pipe. A check torsion spring is arranged between the check valve and the collecting box. The check torsion spring is used to drive the check valve to close the connection between the collecting box and the collecting pipe. The elastic force of the check torsion spring is less than the impact force of the air flow blown from the blowing pipe on the check valve. A pressure relief valve is arranged on the collecting box to maintain the air pressure stability in the collecting box.

[0009] Optionally, the orientation adjustment assembly includes an adjusting iron ring and an adjusting magnetic ring. The adjusting iron ring is embedded in the inner wall of the circulation pipeline and is rotatably connected to the circulation pipeline. The adjusting magnetic ring is sleeved on the outer wall of the circulation pipeline and is rotatably connected to the circulation pipeline. The adjusting magnetic ring is magnetically connected to the adjusting iron ring. An adjusting cloth strip is connected to the inner side wall of the adjusting iron ring. When the filtering ball slides to the adjusting iron ring, the filtering ball is pressed against the adjusting cloth strip.

[0010] Optionally, the transmission assembly includes a transmission roller, a first belt drive, and a second belt drive. Both ends of the transmission roller are rotatably connected to support plates, and the support plates are connected to the circulation pipeline. The first belt drive connects the transmission roller and the output shaft of the motor. There are multiple second belt drives, which correspond to the adjustment magnetic rings one by one. The second belt drive connects the transmission roller and the adjustment magnetic ring. Multiple cam grooves are formed on the transmission roller, which correspond to the push rods one by one. One end of the push rod away from the air blowing piston is connected to a sliding rod, and the sliding rod is slidably arranged in the cam groove.

[0011] Optionally, a filter screen assembly is arranged in the filter box. The filter screen assembly includes a filter screen and an oscillation spring. The filter screen is arranged close to the side wall of the filter box where it communicates with the traveling pipeline, and divides the filter box into two chambers. The filter screen is slidably connected to the filter box. The oscillation spring is arranged between the filter screen and the filter box and is used to drive the filter screen to slide towards the direction close to the vacuum pumping pipeline. A vibrating block is connected to the part of the filter screen corresponding to the lowermost layer of the moving track. When the filter balls on the lowermost layer of the moving track slide over the vibrating block, the filter balls push the filter screen to slide away from the vacuum pumping pipeline.

[0012] Optionally, the moving track includes more than three track rods. All the track rods surround to form the moving track. The filter balls are located in the area surrounded by all the track rods. The track rods are in contact with the filter balls. The distance between two adjacent track rods is less than the diameter of the filter balls. Both ends of each track rod are connected to the filter box.

[0013] Optionally, a plurality of first filter holes are formed in the filter balls along three mutually perpendicular directions. The first filter holes penetrate through the filter balls, and the first filter holes in the three directions communicate with each other in pairs.

[0014] Optionally, an ash storage cavity is formed in the filter balls. A plurality of second filter holes are formed in the filter balls along the diameter direction. The second filter holes communicate with the ash storage cavity.

[0015] In summary, the present application includes at least one of the following beneficial technical effects: 1. A vacuum pumping device for a super-high-speed low-vacuum pipeline in the present application includes a vacuum pump and a filtering mechanism. The filtering mechanism includes a filter box, a filtering component, an ash cleaning component, an orientation adjustment component, and a transmission component. Among them, all the filter balls circulate and slide in the moving track and the circulation pipeline. When the filter balls are in the moving track, they filter dust. When the filter balls are in the circulation pipeline, they are cleaned under the cooperation of the air blowing part and the collection part to restore the filtering ability of the filter balls, so that the filter balls in the filter box are always in a self-renewing state. Thus, the filtering mechanism can always filter air with better filtering performance, making it difficult for a large amount of dust contained in the air to block the filtering mechanism, and making it difficult for the vacuum pump to become blocked. Furthermore, the vacuum pump can continuously pump vacuum for the traveling pipeline. 2. The vacuum pumping device for an ultra-high-speed low-vacuum pipeline in this application further includes a filter screen assembly. Among them, the filter screen can intercept large-volume sundries contained in the air of the pipeline during travel, and the filter screen can oscillate under the combined drive of the filter balls and the oscillating springs, so that the filter screen is not easily blocked, and thus the large-volume sundries in the pipeline during travel are easily and stably filtered out. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of Embodiment 1 of this application; Figure 2 is a schematic structural diagram of the filtering mechanism in Embodiment 1 of this application; Figure 3 is a schematic structural diagram of the moving track in Embodiment 1 of this application; Figure 4 is a schematic structural diagram of the screw conveyor rod in Embodiment 1 of this application; Figure 5 is Figure 2 an enlarged view of part A in Figure 6 is Figure 2 an enlarged view of part B in Figure 7 is a cross-sectional view of the oscillating block in Embodiment 1 of this application; Figure 8 is a schematic structural diagram of the filter ball in Embodiment 1 of this application; Figure 9 is a schematic structural diagram of the filter ball in Embodiment 2 of this application.

[0017] Description of the Reference Numerals: 1. Vacuum pump; 11. Vacuum extraction pipeline; 111. Extraction pipe; 112. Connecting pipe; 113. Second check valve; 2. Filter mechanism; 3. Filter box; 31. Second cleaning hole; 32. Second cleaning plate; 4. Filter assembly; 41. Moving track; 411. Track rod; 42. Circulation pipeline; 421. Screw conveyor rod; 422. Motor; 43. Filter ball; 431. First filter hole; 432. Ash storage cavity; 433. Second filter hole; 5. Ash cleaning assembly; 51. Blowing part; 511. Blowing cylinder; 5111. Blowing pipe; 5112. First check valve; 512. Blowing piston; 513. Push rod; 5131. Slide bar; 52. Collection part; 521. Collection pipe; 522. Collection box; 523. Check plate; 524. Check torsion spring; 525. Pressure relief valve; 526. First cleaning hole; 527. First cleaning plate; 6. Azimuth adjustment assembly; 61. Adjusting iron ring; 611. Adjusting cloth strip; 62. Adjusting magnetic ring; 621. Rotating retaining ring; 7. Transmission assembly; 71. Transmission roller; 711. Support plate; 712. Cam groove; 72. First belt drive; 73. Second belt drive; 8. Filter screen assembly; 81. Filter screen; 82. Oscillation spring; 83. Oscillation block. Detailed implementation mode

[0018] The following will further elaborate on this application in conjunction with the attached Figures 1-9 to provide a more detailed description of this application.

[0019] The embodiment of this application discloses a vacuum extraction device for ultra-high-speed and low-vacuum pipelines. Embodiment 1:

[0020] Referring to Figure 1 , a vacuum extraction device for ultra-high-speed and low-vacuum pipelines, used for extracting vacuum from the traveling pipeline, includes a vacuum pump 1 and a filter mechanism 2. The filter mechanism 2 has the function of self-recovery filtration ability, and the filter mechanism 2 includes a filter box 3, a filter assembly 4, an ash cleaning assembly 5, an azimuth adjustment assembly 6, and a transmission assembly 7.

[0021] The vacuum pump 1 is connected to a vacuum extraction pipeline 11. The vacuum extraction pipeline 11 and the traveling pipeline are respectively connected to the two opposite sides of the filter box 3. The filter box 3 is vertically arranged. The connection position of the vacuum extraction pipeline 11 and the filter box 3 is at the bottom of the filter box 3, and the connection position of the traveling pipeline and the filter box 3 is at the top of the filter box 3.

[0022] Referring to Figure 2 , the filter assembly 4 includes a moving track 41, a circulation pipeline 42, and a filter ball 43.

[0023] Referring to Figure 2 and Figure 3, the moving track 41 is arranged inside the filtering box 3, and is spirally arranged in multiple layers from the bottom end to the top end of the filtering box 3, and each layer of the moving track 41 is arranged in a serpentine shape. The circulating pipeline 42 is arranged outside the filtering box 3, and both ends of the circulating pipeline 42 are respectively communicated with the top and bottom of the filtering box 3, and both ends of the circulating pipeline 42 are respectively arranged opposite to both ends of the moving track 41. A plurality of filtering balls 43 are arranged, and are slidably arranged one by one inside the moving track 41 and the circulating pipeline 42. The filtering balls 43 can circulate and slide inside the moving track 41 and the circulating pipeline 42, and two adjacent filtering balls 43 are in contact with each other. The filtering balls 43 are used for filtering dust.

[0024] Refer to Figure 2 and Figure 4 , a spiral conveyor rod 421 is rotatably arranged inside one end of the circulating pipeline 42 close to the bottom of the filtering box 3. The spiral conveyor rod 421 is connected with a motor 422. The motor 422 is fixedly connected to the outer wall of the circulating pipeline 42. The output shaft of the motor 422 rotates and penetrates into the circulating pipeline 42. The output shaft of the motor 422 is fixedly connected with the spiral conveyor rod 421. The spiral conveyor rod 421 is used for driving the filtering balls 43 to move inside the circulating pipeline 42, so that all the filtering balls 43 can circulate and slide inside the moving track 41 and the circulating pipeline 42.

[0025] Refer to Figure 1 and Figure 2 , the dust cleaning assembly 5 includes a blowing part 51 and a collecting part 52. A plurality of blowing parts 51 are arranged, and the plurality of blowing parts 51 and the collecting part 52 are arranged opposite to each other on both sides of the circulating pipeline 42. Each blowing part 51 is connected with an air extraction pipe 111. All the air extraction pipes 111 are jointly communicated with a connecting pipe 112. The connecting pipe 112 is communicated with the vacuum extraction pipeline 11. The blowing part 51 is used for sucking the air flow inside the vacuum extraction pipeline 11 to blow the dust on the filtering balls 43, and the collecting part 52 is used for collecting the dust blown off the filtering balls 43.

[0026] Refer to Figure 2 , a plurality of azimuth adjusting assemblies 6 are arranged, and are respectively located between two adjacent blowing parts 51. The azimuth adjusting assemblies 6 are arranged on the circulating pipeline 42. The azimuth adjusting assemblies 6 are used for rotating the filtering balls 43, so that different blowing parts 51 can be opposite to different sides of the filtering balls 43.

[0027] The transmission assembly 7 is connected with the output shaft of the blowing part 51 and the motor 422. The transmission assembly 7 is connected with the output shaft of the azimuth adjusting assembly 6 and the motor 422. The transmission assembly 7 is used for driving the blowing part 51 to circulate for air extraction and blowing by means of the driving force of the output shaft of the motor 422. The transmission assembly 7 is used for driving the azimuth adjusting assembly 6 to rotate the filtering balls 43 by means of the driving force of the output shaft of the motor 422.

[0028] During use, the vacuum pump 1 sucks the air in the traveling pipeline through the evacuation pipeline 11 and the filter box 3, so that the traveling pipeline gradually enters a low-vacuum state. The air in the traveling pipeline flows into the filter box 3, and the filter balls 43 in the moving track 41 intercept and filter the dust in the air, so that the dust in the air is not easily introduced into the vacuum pump 1.

[0029] The motor 422 drives the screw conveyor rod 421 to rotate, and the screw conveyor rod 421 drives the filter balls 43 to move spirally. Since two adjacent filter balls 43 are in contact with each other, all the filter balls 43 can circulate and slide in the moving track 41 and the circulation pipeline 42 under the drive of the screw conveyor rod 421, so that the filter balls 43 in the moving track 41 can be continuously replaced.

[0030] The transmission component 7 transmits the driving force of the motor 422 to the blowing part 51 and the azimuth adjustment component 6. The blowing part 51 can suck the air in the evacuation pipeline 11 by virtue of the driving force of the motor 422, and the blowing part 51 can blow the dust on the filter balls 43 by virtue of the driving force of the motor 422, so that the dust is blown into the collection part 52, and the collection part 52 collects the dust, so that the filter balls 43 can recover their filtering ability.

[0031] Since the azimuth adjustment component 6 is located between two adjacent blowing parts 51, the filter balls 43 will first pass through the azimuth adjustment component 6 after passing through the previous blowing part 51. The azimuth adjustment component 6 can rotate the filter balls 43 by virtue of the driving force of the motor 422, so that the azimuth of the filter balls 43 relative to the blowing part 51 can be changed, and the next blowing part 51 can blow the filter balls 43 from another azimuth angle, improving the blowing effect of the filter balls 43 and contributing to the recovery of the filtering ability of the filter balls 43.

[0032] Since the filter balls 43 in the moving track 41 can flow dynamically, and the filter balls 43 that flow back into the moving track 41 are the filter balls 43 with restored filtering ability, the filtering ability of the filtering mechanism 2 can be continuously restored during the process of filtering dust. Although the filtering mechanism 2 needs to filter a large amount of dust, because the filtering ability of the filtering mechanism 2 can be automatically restored, the filtering mechanism 2 is not easily blocked while filtering a large amount of dust, and further enables the vacuum pump 1 to continuously evacuate the traveling pipeline, so that the traveling pipeline of the maglev train can achieve a low-vacuum state.

[0033] Specifically, referring to Figure 5 the blowing part 51 includes a blowing cylinder 511, a blowing piston 512 and a push rod 513.

[0034] The blowing cylinder 511 is communicated with a blowing pipe 5111. The blowing pipe 5111 is communicated with the circulating pipeline 42. One end of the air extraction pipe 111 away from the communicating pipe 112 is communicated with the blowing cylinder 511. A blowing piston 512 is hermetically and slidably arranged in the blowing cylinder 511. The blowing piston 512 is used to make the blowing cylinder 511 extract air and blow air.

[0035] A push rod 513 is fixedly connected to the blowing piston 512. Moving the push rod 513 can make the blowing piston 512 slide. A first one-way valve 5112 is arranged on the blowing pipe 5111. The conduction direction of the first one-way valve 5112 is from the inside of the blowing cylinder 511 to the inside of the circulating pipeline 42. A second one-way valve 113 is arranged on the air extraction pipe 111. The conduction direction of the second one-way valve 113 is from the inside of the communicating pipe 112 to the inside of the blowing cylinder 511.

[0036] When the filtering ball 43 moves to the blowing pipe 5111, the push rod 513 is reciprocally moved. The push rod 513 drives the blowing piston 512 to reciprocally slide. When the blowing piston 512 slides away from the blowing pipe 5111, the space enclosed by the blowing piston 512 and the blowing cylinder 511 will increase to form a negative pressure. The negative pressure in the blowing cylinder 511 closes the first one-way valve 5112 and opens the second one-way valve 113, so that the air in the vacuum extraction pipeline 11 can be pumped into the blowing cylinder 511. When the blowing piston 512 slides close to the blowing pipe 5111, the space enclosed by the blowing piston 512 and the blowing cylinder 511 will decrease to form a positive pressure. The positive pressure in the blowing cylinder 511 opens the first one-way valve 5112 and closes the second one-way valve 113, so that the air in the blowing cylinder 511 can be blown into the circulating pipeline 42 from the blowing pipe 5111. The air flow blown out by the blowing pipe 5111 can blow the dust on the filtering ball 43, so as to restore the filtering ability of the filtering ball 43.

[0037] Specifically, referring to Figure 2 , the collection part 52 includes a collection pipe 521 and a collection box 522.

[0038] Referring to Figure 2 and Figure 6 , a plurality of collection pipes 521 are arranged and are all communicated with the circulating pipeline 42. The collection pipes 521 and the blowing pipes 5111 are arranged in one-to-one correspondence and face each other. The collection box 522 is communicated with all the collection pipes 521.

[0039] Since the blowing pipes 5111 and the collection pipes 521 are arranged to face each other, the air flow in the blowing pipes 5111 can blow the dust on the filtering balls 43 into the collection pipes 521. The air flow carries the dust and enters the collection box 522 from the collection pipes 521, so that the dust after blowing is convenient for automatic centralized collection.

[0040] Particularly, referring to Figure 2, To facilitate the cleaning of the dust collected in the collection box 522, a first cleaning hole 526 is provided at the bottom end of the collection box 522, and a first cleaning plate 527 is hermetically and slidably inserted at the first cleaning hole 526. By opening the first cleaning plate 527, the dust in the collection box 522 can be conveniently cleaned.

[0041] Furthermore, referring to Figure 2 and Figure 6 , a check valve plate 523 is hinged at the connection between the collection box 522 and each collection pipe 521. A check torsion spring 524 is fixedly provided between the check valve plate 523 and the collection box 522. The check torsion spring 524 is used to drive the check valve plate 523 to close the connection between the collection box 522 and the collection pipe 521. The elastic force of the check torsion spring 524 is less than the impact force of the airflow blown out by the blow pipe 5111 on the check valve plate 523. A pressure relief valve 525 for maintaining the stable air pressure in the collection box 522 is provided on the collection box 522 to prevent the air pressure in the collection box 522 from being too high, resulting in the airflow blown out of the blow pipe 5111 being unable to open the check valve plate 523.

[0042] When there is airflow blown out in the blow pipe 5111, the impact force of the airflow on the check valve plate 523 can overcome the elastic force of the check torsion spring 524 to open the check valve plate 523, so that the airflow can blow and sweep the dust into the collection box 522; when the airflow in the blow pipe 5111 stops blowing, the check valve plate 523 can close the connection between the collection pipe 521 and the collection box 522 under the action of the elastic force of the check torsion spring 524, making the dust in the collection box 522 not easily sucked back into the circulation pipeline 42; when the air pressure in the collection box 522 increases, the pressure relief valve 525 can discharge the gas in the collection box 522 to reduce the air pressure in the collection box 522, making it easy to maintain the stable air pressure in the collection box 522.

[0043] Specifically, referring to Figure 6 , the azimuth adjustment assembly 6 includes an adjustment iron ring 61 and an adjustment magnetic ring 62.

[0044] The adjustment iron ring 61 is embedded in the inner wall of the circulation pipeline 42 and is rotatably connected to the circulation pipeline 42. The adjustment magnetic ring 62 is sleeved on the outer wall of the circulation pipeline 42 and is rotatably connected to the circulation pipeline 42. The adjustment magnetic ring 62 is magnetically connected to the adjustment iron ring 61. An adjustment cloth strip 611 is fixedly connected to the inner side wall of the adjustment iron ring 61. When the filter ball 43 slides to the adjustment iron ring 61, the filter ball 43 is pressed against the adjustment cloth strip 611.

[0045] Among them, rotating retaining rings 621 are provided on both sides of the adjustment magnetic ring 62. The rotating retaining rings 621 are fixedly connected to the circulation pipeline 42 and are arranged in a fitting manner with the adjustment magnetic ring 62. The rotating retaining rings 621 on both sides of the adjustment magnetic ring 62 form a rotational connection structure between the adjustment magnetic ring 62 and the circulation pipeline 42.

[0046] Since the adjusting iron ring 61 is magnetically connected to the adjusting magnetic ring 62, rotating the adjusting magnetic ring 62 can drive the adjusting iron ring 61 to rotate. When the filtering ball 43 slides to the position of the adjusting iron ring 61, the adjusting iron ring 61 can drive the filtering ball 43 to rotate through the adjusting cloth strip 611. Therefore, by rotating the adjusting magnetic ring 62 outside the circulating pipeline 42, the filtering ball 43 inside the circulating pipeline 42 can be driven to rotate, so that the azimuth angle of the blowing of the filtering ball 43 can be adjusted.

[0047] Specifically, referring to Figure 2 , the transmission assembly 7 includes a transmission roller 71, a first belt drive 72 and a second belt drive 73.

[0048] Referring to Figure 2 and Figure 6 , both ends of the transmission roller 71 are rotatably connected with support plates 711, and the support plates 711 are fixedly connected to the circulating pipeline 42; the first belt drive 72 connects the output shaft of the transmission roller 71 and the motor 422, and the first belt drive 72 transmits the driving force of the output shaft of the motor 422 to the transmission roller 71; there are multiple second belt drives 73, and they correspond to the adjusting magnetic rings 62 one by one. The second belt drive 73 connects the transmission roller 71 and the adjusting magnetic ring 62, and the second belt drive 73 transmits the driving force of the transmission roller 71 to the adjusting magnetic ring 62.

[0049] Referring to Figure 5 , a plurality of cam grooves 712 are formed on the transmission roller 71, and the cam grooves 712 correspond to the push rods 513 one by one. One end of the push rod 513 away from the blowing piston 512 is fixedly connected with a sliding rod 5131, and the sliding rod 5131 is slidably arranged in the cam groove 712. During the rotation of the cam groove 712 with the transmission roller 71, the cam groove 712 can drive the push rod 513 to reciprocate through the sliding rod 5131.

[0050] When the motor 422 drives the screw conveyor 421 to convey the filtering balls 43, the output shaft of the motor 422 can drive the transmission roller 71 to rotate through the first belt drive 72. The transmission roller 71 can drive the push rod 513 to move through the cam groove 712, and the transmission roller 71 can drive the adjusting magnetic ring 62 to rotate through the second belt drive 73. Therefore, when the filtering ball 43 slides, the transmission roller 71 can drive the push rod 513 and the adjusting magnetic ring 62 to act synchronously. Through the transmission function of the transmission roller 71, the driving force of the motor 422 is used for three purposes, making full use of the driving force of the motor 422.

[0051] Referring to Figure 2 , in order to intercept large-volume sundries in the driving pipeline, a filter screen assembly 8 is arranged in the filter box 3, and the filter screen assembly 8 includes a filter screen 81 and an oscillating spring 82.

[0052] Referring to Figure 1 and Figure 2, the filter screen 81 is arranged close to the side wall of the filter box 3 communicating with the driving pipeline, and divides the filter box 3 into two chambers. The filter screen 81 is slidably connected to the filter box 3, and the sliding direction of the filter screen 81 is the direction close to or away from the vacuum extraction pipeline 11.

[0053] Refer to Figure 2 and Figure 7 , a plurality of oscillating springs 82 are provided. The oscillating springs 82 are fixedly arranged between the filter screen 81 and the filter box 3, and are used to drive the filter screen 81 to slide in the direction close to the vacuum extraction pipeline 11. A vibrating block 83 is fixedly connected to the part of the filter screen 81 corresponding to the lowermost layer of the moving track 41. The vibrating block 83 is triangular. When the filtering balls 43 on the lowermost layer of the moving track 41 slide over the vibrating block 83, the filtering balls 43 push the filter screen 81 to slide in the direction away from the vacuum extraction pipeline 11.

[0054] The filter screen 81 can first filter the air in the driving pipeline, so that large-volume sundries mixed in the driving pipeline can be intercepted on the side of the filter screen 81 close to the driving pipeline, making it difficult for large-volume sundries in the driving pipeline to enter the vacuum extraction pipeline 11 through the filter box 3; when the filtering balls 43 slide, the filtering balls 43 on the lowermost layer of the moving track 41 can push the vibrating block 83 to move. Under the elastic force of the oscillating springs 82, the filter screen 81 can realize reciprocating oscillation, so that the large-volume sundries filtered by the filter screen 81 are easy to fall to the bottom of the filter box 3, making it difficult for the filter screen 81 to be blocked, so that the filter screen 81 can continuously filter the air in the driving pipeline.

[0055] In particular, refer to Figure 7 , in order to facilitate the cleaning of large-volume sundries in the filter box 3, a second cleaning hole 31 is opened at the bottom end of the filter box 3. The second cleaning hole 31 is located on the side of the filter screen 81 close to the driving pipeline. A second cleaning plate 32 is hermetically inserted at the second cleaning hole 31. By opening the second cleaning plate 32, the dust in the filter box 3 can be conveniently cleaned.

[0056] Refer to Figure 2 and Figure 3 , in order to facilitate the filtering balls 43 to filter dust, the moving track 41 includes three track rods 411. All the track rods 411 surround to form the moving track 41. The filtering balls 43 are located in the area surrounded by all the track rods 411. The track rods 411 are in contact with the filtering balls 43. The distance between two adjacent track rods 411 is less than the diameter of the filtering balls 43, and the filtering balls 43 cannot fall out of the moving track 41 between two adjacent track rods 411. Both ends of each track rod 411 are fixedly connected to the filter box 3.

[0057] The moving track 41 is formed by three track rods 411, so that the moving track 41 is not likely to block the filtering ball 43, thereby facilitating the full filtering of the filtering ball 43 and improving the filtering effect of the filtering ball 43.

[0058] Referring to Figure 8 , in order to make it easy for the filtering ball 43 to filter dust and make the dust filtered by the filtering ball 43 easy to be purged, a plurality of first filter holes 431 are provided on the filtering ball 43 along three mutually perpendicular directions. The first filter holes 431 penetrate through the filtering ball 43, and the first filter holes 431 in the three directions are mutually connected in pairs.

[0059] Since the first filter holes 431 are provided in the filtering ball 43 in three directions, when air passes through the filtering ball 43, the probability of air flowing through the first filter holes 431 is increased, and the effectiveness of the filtering ball 43 in filtering air is improved; since the first filter holes 431 in the three directions on the filtering ball 43 are mutually connected in pairs, when purging is performed from one direction of the filtering ball 43, the dust in the first filter holes 431 in the three directions can be synchronously blown out, making the dust filtered by the filtering ball 43 easy to be purged.

[0060] The implementation principle of an evacuation device for a super-high-speed and low-vacuum pipeline in an embodiment of the present application is as follows: during use, the vacuum pump 1 sucks the air in the traveling pipeline, the motor 422 drives the spiral conveying rod 421 to rotate, the spiral conveying rod 421 drives all the filtering balls 43 to circulate and slide in the moving track 41 and the circulation pipeline 42, air flows into the filtering box 3, the filter net 81 filters out large-volume sundries in the air, the filtering balls 43 filter out a large amount of dust contained in the air, the filtering balls 43 are purged and cleaned when sliding past the air blowing pipe 5111 and the collection pipe 521, and the filtering balls 43 are adjusted in purging angle when sliding past the adjusting iron ring 61, so that the filtering balls 43 can restore the filtering ability when re-entering the filtering box 3, enabling the filtering mechanism 2 to automatically restore the filtering ability, thereby making the traveling pipeline not likely to be blocked by a large amount of dust during evacuation, and making it easy to achieve a low-vacuum state for the traveling pipeline of the maglev train. Embodiment 2:

[0061] Referring to Figure 9 , the difference between this embodiment and Embodiment 1 is that, in order to make it easy for the filtering ball 43 to filter dust and make the dust filtered by the filtering ball 43 easy to be purged, a dust storage cavity 432 is provided in the filtering ball 43, and a plurality of second filter holes 433 are provided on the filtering ball 43 along the diameter direction. The second filter holes 433 are communicated with the dust storage cavity 432.

[0062] Since a plurality of second filter holes 433 are formed along the diameter direction of the filter ball 43, some of the second filter holes 433 on the filter ball 43 will always face the flowing air, making it easy for the filter ball 43 to effectively filter the air; since the second filter holes 433 communicate with the ash storage cavity 432, when purging from one direction of the filter ball 43, the purging air flow can blow the dust out of the second filter holes 433 that are not facing the air flow through the ash storage cavity 432, making it easy to purge the dust filtered by the filter ball 43.

[0063] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A vacuum pumping device for ultra-high-speed low-vacuum pipelines, characterized in that: It comprises a vacuum pump (1) and a filtering mechanism (2), wherein the filtering mechanism (2) comprises a filtering box (3), a filtering assembly (4), a dust cleaning assembly (5), an orientation adjustment assembly (6) and a transmission assembly (7); The vacuum pump (1) is connected to a vacuum extraction pipeline (11), and the vacuum extraction pipeline (11) and the travel pipeline are respectively connected to two sides directly facing the filter box (3); The filter assembly (4) comprises a moving track (41), a circulation pipeline (42) and a filter ball (43); The movable track (41) is arranged in the filter box (3) and is arranged in a winding manner with multiple layers. The circulation pipe (42) is arranged outside the filter box (3). Both ends of the circulation pipe (42) are connected to the filter box (3). Both ends of the circulation pipe (42) are arranged opposite to both ends of the movable track (41). A plurality of filter balls (43) are arranged and are slidably arranged one by one in the movable track (41) and the circulation pipe (42). Two adjacent filter balls (43) are in contact with each other. The filter balls (43) are used to filter dust. A spiral conveying rod (421) is rotatably disposed inside one end of the circulation pipe (42), the spiral conveying rod (421) is connected to a motor (422), and the spiral conveying rod (421) is used to drive the filter balls (43) to move in the circulation pipe (42), so that all the filter balls (43) slide in a circulation manner in the moving track (41) and the circulation pipe (42); The dust cleaning component (5) comprises a blowing part (51) and a collecting part (52). A plurality of blowing parts (51) are provided. The plurality of blowing parts (51) and the collecting part (52) are arranged on both sides of the circulation pipe (42) opposite to each other. Each blowing part (51) is connected to an exhaust pipe (111). All the exhaust pipes (111) are connected to a connecting pipe (112). The connecting pipe (112) is connected to the vacuum pipe (11). The blowing part (51) is used to suck the airflow in the vacuum pipe (11) to sweep the dust on the filter ball (43). The collecting part (52) is used to collect the dust blown off the filter ball (43). A plurality of orientation adjustment components (6) are provided and are respectively located between two adjacent blowing parts (51). The orientation adjustment components (6) are arranged on the circulation pipe (42). The orientation adjustment components (6) are used to rotate the filter ball (43) so that different blowing parts (51) can face different sides of the filter ball (43). The transmission assembly (7) is connected to the blowing part (51) and the output shaft of the motor (422), and is also connected to the azimuth adjustment assembly (6) and the output shaft of the motor (422). The transmission assembly (7) is used to drive the blowing part (51) to cyclically perform air extraction and air blowing by means of the driving force of the output shaft of the motor (422). The transmission assembly (7) is used to drive the azimuth adjustment assembly (6) to rotate the filter ball (43) by means of the driving force of the output shaft of the motor (422).

2. A vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 1, characterized in that: The blowing part (51) comprises a blowing cylinder (511), a blowing piston (512) and a push rod (513); the blowing cylinder (511) is connected to a blowing pipe (5111); the blowing pipe (5111) is connected to the circulation pipe (42); one end of the exhaust pipe (111) away from the connecting pipe (112) is connected to the blowing cylinder (511); the blowing piston (512) is sealingly slidably arranged in the blowing cylinder (511); and the push rod (513) is A first one-way valve (5112) is provided on the blowing pipe (5111), which is connected to the blowing piston (512). The conducting direction of the first one-way valve (5112) is from the inside of the blowing cylinder (511) to the inside of the circulation pipe (42). A second one-way valve (113) is provided on the exhaust pipe (111). The conducting direction of the second one-way valve (113) is from the inside of the connecting pipe (112) to the inside of the blowing cylinder (511).

3. A vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 2, characterized in that: The collecting portion (52) comprises a collecting pipe (521) and a collecting box (522). A plurality of collecting pipes (521) are provided and are all connected to the circulation pipe (42). The collecting pipes (521) correspond to the blowing pipes (5111) one by one and are arranged opposite to each other. The collecting box (522) is connected to all the collecting pipes (521).

4. A vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 3, characterized in that: A check plate (523) is hingedly connected at the connection point between the collection box (522) and each collection tube (521), and a check torsion spring (524) is provided between the check plate (523) and the collection box (522). The check torsion spring (524) is used to drive the check plate (523) to close the connection point between the collection box (522) and the collection tube (521). The elastic force of the check torsion spring (524) is smaller than the impact force of the air flow blown out by the blowing pipe (5111) on the check plate (523). The collection box (522) is provided with a pressure relief valve (525) for maintaining the air pressure in the collection box (522) stable.

5. The vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 2, characterized in that: The orientation adjustment component (6) comprises an adjustment iron ring (61) and an adjustment magnetic ring (62); the adjustment iron ring (61) is embedded in the inner wall of the circulation pipe (42) and is rotatably connected to the circulation pipe (42); the adjustment magnetic ring (62) is sleeved on the outer wall of the circulation pipe (42) and is rotatably connected to the circulation pipe (42); the adjustment magnetic ring (62) is magnetically connected to the adjustment iron ring (61); an adjustment cloth strip (611) is connected to the inner side wall of the adjustment iron ring (61); when the filter ball (43) slides to the adjustment iron ring (61), the filter ball (43) is pressed against the adjustment cloth strip (611).

6. A vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 5, characterized in that: The transmission assembly (7) comprises a transmission roller (71), a first belt transmission (72) and a second belt transmission (73). Both ends of the transmission roller (71) are rotatably connected with support plates (711), the support plates (711) are connected to the circulation pipeline (42), the first belt transmission (72) is connected to the transmission roller (71) and the output shaft of the motor (422), a plurality of second belt transmissions (73) are provided, and they correspond one-to-one with the adjustment magnetic ring (62), the second belt transmission (73) is connected to the transmission roller (71) and the adjustment magnetic ring (62), a plurality of cam grooves (712) are provided on the transmission roller (71), the cam grooves (712) correspond one-to-one with the push rod (513), one end of the push rod (513) away from the blowing piston (512) is connected to a sliding rod (5131), and the sliding rod (5131) is slidably arranged in the cam groove (712).

7. The vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 1, characterized in that: A filter assembly (8) is arranged in the filter box (3), and the filter assembly (8) comprises a filter (81) and an oscillation spring (82). The filter (81) is arranged near a side wall of the filter box (3) communicating with the travel pipe, and divides the filter box (3) into two chambers. The filter (81) is slidably connected to the filter box (3). The oscillation spring (82) is arranged between the filter (81) and the filter box (3), and is used to drive the filter (81) to slide in a direction close to the vacuum pipe (11). An oscillation block (83) is connected to a portion of the filter (81) corresponding to the bottom layer of the moving track (41). When a filter ball (43) at the bottom layer of the moving track (41) slides over the oscillation block (83), the filter ball (43) pushes the filter (81) to slide in a direction away from the vacuum pipe (11).

8. The vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 1, characterized in that: The movable track (41) comprises more than three track rods (411), all of which surround the movable track (41), the filter balls (43) are located in the area surrounded by all of the track rods (411), the track rods (411) abut against the filter balls (43), the distance between two adjacent track rods (411) is smaller than the diameter of the filter balls (43), and both ends of each track rod (411) are connected to the filter box (3).

9. The vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 1, characterized in that: The filter ball (43) is provided with a plurality of first filter holes (431) along three directions that are perpendicular to each other. The first filter holes (431) pass through the filter ball (43), and the first filter holes (431) in the three directions are interconnected in pairs.

10. The vacuum pumping device for ultra-high-speed low-vacuum pipeline according to claim 1, characterized in that: An ash storage cavity (432) is provided in the filter ball (43), and a plurality of second filter holes (433) are provided on the filter ball (43) along the diameter direction, and the second filter holes (433) are communicated with the ash storage cavity (432).

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