Multifunctional integrated high-speed centrifugal vacuum pump

Abstract

The invention relates to the technical field of vacuum pumps, in particular to a multifunctional integrated high-speed centrifugal vacuum pump which comprises a pump body, an air inlet valve, an exhaust barrel, a filter unit and an air inlet caliber adjusting unit. The centrifugal vacuum pump can solve the following problems in an existing centrifugal vacuum pump: gas extracted by the centrifugal vacuum pump cannot be filtered, so that particle impurities easily enter the centrifugal vacuum pump to cause faults of the centrifugal vacuum pump; an impeller cannot continue to improve the air exhaust efficiency and the vacuum degree of a centrifugal vacuum pump at the maximum rotating speed, and limitation exists. Particle impurities, harmful substances and harmful gas in gas can be effectively filtered out, the filtered gas is extracted by the pump body, and therefore faults of the pump body are avoided; by reducing the diameter of the air inlet of the pump body and increasing the flow speed of air passing through the air inlet of the pump body, the air pumping strength of the pump body can be improved when the impeller is at the maximum rotating speed, and the air pumping efficiency and the vacuum degree of the pump body can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum pumps, and in particular to a multifunctional integrated high-speed centrifugal vacuum pump. Background Art

[0002] In many industrial fields, such as chemical, pharmaceutical and electronic industries, centrifugal vacuum pumps play a vital role in extracting gases to obtain a specific vacuum environment. However, existing centrifugal vacuum pumps generally have a single function and are only used for vacuuming, which cannot meet the needs of modern complex industrial production for the integration of multiple functions. For example, in chemical production, the extracted gas may contain impurities. If there is no integrated filtering function, the impurities will enter the pump body, accelerate the wear of internal parts, reduce the service life of the pump, and even cause failures.

[0003] With the development of science and technology, technicians in related fields have also carried out a lot of optimization on centrifugal vacuum pumps. In order to make a more accurate comparison, a Chinese patent with publication number CN117469183A discloses a centrifugal vacuum pump, including a vacuum pump body, an air intake pipe and a connecting pipe. The vacuum pump body includes an air flow channel, a connecting plate and an impeller. The impeller is located between the air flow channel and the connecting plate. There is a wheel back cavity between the impeller and the connecting plate. The first end of the connecting pipe is connected to the wheel back cavity, and the second end of the connecting pipe is connected to the interior of the air intake pipe through the side wall of the air intake pipe.

[0004] When the above-mentioned prior art is in use, the connecting pipe connects the wheel back cavity with the intake pipe. Since the pressure in the wheel back cavity is greater than that in the intake pipe, the gas in the wheel back cavity enters the intake pipe through the connecting pipe, reducing the pressure in the wheel back cavity and increasing the pressure in the intake pipe, thereby reducing the axial force on the impeller caused by the pressure difference between the wheel back cavity and the intake pipe, so that the impeller is balanced in the axial direction, avoiding the wear of the internal parts of the centrifugal vacuum pump due to the movement of the impeller, and improving the stability of the centrifugal vacuum pump.

[0005] However, the centrifugal vacuum pump provided by the above prior art has some shortcomings in actual use: 1. Since centrifugal vacuum pumps need to be used in a variety of different scenarios, such as industrial or chemical production that produces particulate impurities, harmful substances or gases, the gas extracted by the centrifugal vacuum pump may contain particulate impurities. However, the above-mentioned prior art is unable to filter the gas extracted by the centrifugal vacuum pump, resulting in particulate impurities in the gas entering the interior of the centrifugal vacuum pump, causing wear of the internal parts of the centrifugal vacuum pump, and easily causing failure of the centrifugal vacuum pump. In addition, the gas discharged from the centrifugal vacuum pump contains unfiltered harmful substances and harmful gases, which easily pollutes the environment.

[0006] 2. In addition, in some environments, the centrifugal vacuum pump is required to have sufficient suction efficiency and vacuum degree. Although the suction efficiency and vacuum degree of the centrifugal vacuum pump can be adjusted by increasing or decreasing the rotation speed of the impeller, the suction efficiency and vacuum degree of the centrifugal vacuum pump cannot be further improved when the impeller is at the maximum rotation speed. Moreover, the above-mentioned prior art cannot adjust the suction efficiency and vacuum degree of the centrifugal vacuum pump according to actual needs, and thus has limitations.

[0007] Therefore, under the above-stated viewpoint, the existing centrifugal vacuum pumps still have room for improvement. Summary of the invention

[0008] In order to solve the above problems, the present invention provides a multifunctional integrated high-speed centrifugal vacuum pump, including a pump body installed inside a casing; an intake valve installed at the intake end of the pump body through a connecting tube, and an interface for connecting to an input pipe is provided at the upper end of the intake valve; an exhaust tube is provided at the exhaust end of the pump body, and one end of the exhaust tube away from the pump body extends to the outside after passing through the casing; a filter unit is installed on the connecting tube, and is used to filter the gas sucked into the pump body; an intake port diameter adjustment unit is provided at the intake end of the pump body, and is used to adjust the diameter of the intake port of the pump body, so as to adjust the flow rate of the gas entering the pump body as well as the suction efficiency and vacuum degree.

[0009] As a preferred technical solution of the present invention, the filter unit includes a through hole opened on the connecting tube, a block is slidably penetrated in the through hole, and a filter element for filtering the gas passing through the connecting tube is installed on the block.

[0010] As a preferred technical solution of the present invention, the filter element consists of a cover shell, a dust screen and an activated carbon filter pad, wherein the cover shell is detachably arranged in the mounting hole, the dust screen is detachably installed on the side of the cover shell away from the pump body, and a plurality of activated carbon filter pads are installed on the side of the cover shell close to the pump body.

[0011] As a preferred technical solution of the present invention, the block is provided with a plurality of mounting holes equidistantly distributed along its length direction, the filter element has a plurality of filter elements, and the plurality of filter elements are detachably disposed in the plurality of mounting holes.

[0012] As a preferred technical solution of the present invention, both side walls in the thickness direction of the block are provided with multiple positioning groups corresponding to the positions of the mounting holes, each positioning group includes two connecting grooves opened on the side walls of the block, a top block is arranged in the connecting groove through a supporting spring rod, and two fixed blocks matching the position of the top block are installed on the outer wall of the connecting tube.

[0013] As a preferred technical solution of the present invention, one of the filter elements has a hollow structure inside, a blocking net is provided on the side of the filter element away from the dust screen, storage cavities corresponding to the position of the filter element are provided at both the upper and lower ends of the block, and a plurality of atomization holes are provided in the storage cavity and inside the filter element; A liquid storage box is installed on the side wall of the block, and a vacuum pump and an exhaust pump are installed at both ends of the liquid storage box to spray the liquid in the liquid storage box into the filter element through the storage cavity in the form of atomization to intercept and filter the gas.

[0014] As a preferred technical solution of the present invention, the air inlet diameter adjustment unit includes an annular spring piece installed inside the air inlet end of the pump body, the annular spring piece cover is arranged outside the impeller, and annular elastic pads are installed between the two ends of the annular spring piece and the inner wall of the air inlet end of the pump body.

[0015] As a preferred technical solution of the present invention, the side wall of the air inlet end of the pump body is penetrated by a plurality of annularly distributed threaded rods by means of a threaded connection, and an end of the threaded rod close to the impeller is rotatably installed with an extrusion pad that rests against the outer wall of the annular spring sheet, and the outer side wall of the air inlet end of the pump body is rotatably installed with a plurality of sleeves that are respectively movably sleeved on the outer walls of the threaded rods, and the plurality of sleeves are connected by a circular conveyor belt, and the outer wall of any one of the conveyor belts is sleeved with a linkage gear, and a positioning motor is installed on the outer side wall of the air inlet end of the pump body through a motor seat, and the output end of the positioning motor is sleeved with a driving gear that meshes with the linkage gear.

[0016] As a preferred technical solution of the present invention, the threaded rod is provided with a longitudinal slide groove parallel to its axis, and the inner wall of the sleeve is provided with key teeth slidably docked in the longitudinal slide groove.

[0017] As a preferred technical solution of the present invention, a stepped cylinder is installed at the upper end of the interface, and the stepped cylinder is composed of multiple fixed cylinders with different diameters. A threaded groove is opened on the outer wall of each fixed cylinder for connecting with input pipes of different specifications.

[0018] In summary, this application includes the following beneficial technical effects: 1. The present invention can filter out particulate impurities, fine particles, harmful substances and harmful gases in the gas through the filter element, so that the pump body draws the filtered gas, thereby preventing the particulate matter and harmful substances in the gas from entering the pump body and causing malfunctions, so as to extend the service life of the pump body, and the filtered gas can be directly discharged into the air to avoid residual harmful substances and harmful gases in the gas from polluting the environment.

[0019] 2. The multiple filter elements distributed in the length direction of the block provided by the present invention are used to filter gases containing particles such as dust, filter gases containing odors, and filter gases containing harmful substances and harmful gases in turn. When the pump body draws gas in different scenarios, it pushes the block and drives the filter element with corresponding filtering function to overlap with the connecting tube, thereby being able to adjust the filtering effect of the gas according to actual needs, so as to adapt to different usage scenarios and be easy to operate.

[0020] 3. The present invention can remove harmful substances and harmful gases by spraying water mist inside the filter element to fully react with harmful substances in the gas, thereby intercepting and filtering the gas through the water mist to ensure the filtering strength of the gas; when the pump body draws gas, the filtered gas in the connecting cylinder and part of the water mist that has not risen in time are extracted together and pass through the blocking net, and the filtered gas can be further filtered through the blocking net to facilitate the adsorption of reacted particulate matter in the gas, further ensuring the filtering effect of harmful gases.

[0021] 4. The present invention controls the rotation of the threaded rod and drives the extrusion pad, the annular spring sheet and the annular elastic pad to shrink toward the side close to the impeller, thereby reducing the diameter of the air inlet of the pump body, thereby increasing the flow rate of the gas passing through the air inlet of the pump body, making the gas more concentrated when entering the pump body, reducing air flow turbulence and energy loss, which is beneficial to improving the intensity of extracting gas from the pump body when the impeller is at the maximum speed, and can effectively improve the air extraction efficiency and vacuum degree of the pump body; and the present invention can also increase the diameter of the air inlet of the pump body according to actual needs, so that it can be used for vacuum treatment in different scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure among the pump body, the air intake valve, the filter unit and the air intake caliber adjustment unit of the present invention.

[0025] Figure 3 It is a schematic diagram of the structure between the connecting cylinder, the stopper and the filter element of the present invention.

[0026] Figure 4 It is a schematic diagram of the structure between the connecting cylinder and the stopper of the present invention.

[0027] Figure 5 The present invention Figure 4 A partial enlarged view of point A.

[0028] Figure 6 It is a schematic diagram of the structure between the stopper and the filter element of the present invention.

[0029] Figure 7 It is a schematic diagram of the structure between the pump body and the air inlet diameter adjustment unit of the present invention.

[0030] Figure 8 It is a schematic diagram of the structure between the pump body, the impeller and the air inlet diameter adjustment unit of the present invention.

[0031] Fig. 9 The present invention Figure 8 A partial enlarged view of point B.

[0032] In the figure, 1, pump body; 11, impeller; 12, casing; 2, connecting tube; 3, air inlet valve; 31, interface; 32, stepped tube; 4, exhaust tube; 5, filter unit; 51, block; 511, connecting groove; 512, supporting spring rod; 513, top block; 514, fixing block; 52, filter element; 521, cover; 522, dust screen; 523, activated carbon filter pad; 524, blocking net; 525, through hole ; 526, storage chamber; 527, atomization hole; 528, liquid storage box; 529, vacuum pump; 530, exhaust pump; 531, atomization head; 6, air inlet diameter adjustment unit; 61, annular spring; 62, annular elastic pad; 63, threaded rod; 64, extrusion pad; 65, sleeve; 66, circular conveyor belt; 67, linkage gear; 68, positioning motor; 69, driving gear; 70, longitudinal slide groove; 71, key tooth. DETAILED DESCRIPTION

[0033] The following is combined with Figure 1-9 Embodiments of the present invention are described in detail.

[0034] The embodiment of the present application discloses a multifunctional integrated high-speed centrifugal vacuum pump. It should be noted that the multifunctional integrated high-speed centrifugal vacuum pump of the present application is mainly used in the process of extracting gas to obtain a vacuum environment. In terms of technical effect, it can filter out particulate impurities, fine particles, harmful substances and harmful gases in the gas extracted by the pump body 1, so that the pump body 1 extracts the filtered gas, thereby preventing the particulate matter and harmful substances in the gas from entering the pump body 1 and causing malfunctions; especially when filtering the gas generated in industrial or chemical production, the gas can be intercepted and filtered by water mist to remove harmful substances and harmful gases; further, the multifunctional integrated high-speed centrifugal vacuum pump of the present application can also adjust the diameter of the air inlet of the pump body 1. When the diameter of the air inlet of the pump body 1 is reduced, the flow rate of the gas passing through the air inlet of the pump body 1 can be increased, reducing air flow turbulence and energy loss, which is beneficial to improving the strength of the impeller 11 in extracting gas, and can effectively improve the air extraction efficiency and vacuum degree of the pump body 1.

[0035] Reference Figure 1 and Figure 2As shown, a multifunctional integrated high-speed centrifugal vacuum pump includes a pump body 1, which is installed inside a casing 12; an air inlet valve 3, which is installed on the air inlet end of the pump body 1 through a connecting tube 2, and an interface 31 for connecting to an input pipe is provided on the upper end of the air inlet valve 3; a stepped tube 32 is installed on the upper end of the interface 31, and the stepped tube 32 is composed of a plurality of fixed tubes with different diameters, and a threaded groove is provided on the outer wall of each fixed tube for connecting to input pipes of different specifications; an exhaust tube 4 is arranged at the exhaust end of the pump body 1, and the end of the exhaust tube 4 away from the pump body 1 passes through the casing 12 and extends to the outside; a flange for installing a pipeline is provided on the upper end of the exhaust tube 4, so that the gas discharged from the pump body 1 can be reused according to needs; a filter unit 5, which is installed on the connecting tube 2, and is used to filter the gas sucked into the pump body 1; an air inlet diameter adjustment unit 6, which is arranged at the air inlet end of the pump body 1, and is used to adjust the diameter of the air inlet of the pump body 1, so as to adjust the flow rate of the gas entering the pump body 1 as well as the suction efficiency and vacuum degree.

[0036] In the specific implementation process, before using the pump body 1, first connect the interface 31 of the pump body 1 to the input pipe, then start the pump body 1, control the impeller 11 inside the pump body 1 to rotate and generate negative pressure at its air inlet end, and the pump body 1 extracts the gas in the working container through the input pipe. During this period, since the gas may contain harmful substances or gases that cannot meet the emission standards, the filter unit 5 can filter the gas before it enters the pump body 1, so as to filter out harmful substances and gases in the gas, and then the pump body 1 discharges the filtered gas into the air through the exhaust pipe 4; in addition, the diameter of the air inlet of the pump body 1 can be adjusted through the air inlet diameter adjustment unit 6, thereby adjusting the air extraction efficiency and vacuum degree.

[0037] Reference Figure 3 As shown, in industrial or chemical production, the gas extracted by the pump body 1 may contain harmful substances or harmful gases, which can easily accelerate the wear of the internal parts of the pump body 1 and cause the pump body 1 to easily malfunction. In order to extend the service life of the pump body 1, a filter unit 5 is provided in this embodiment. Specifically, the filter unit 5 includes a through hole opened on the connecting tube 2, the opening direction of the through hole is perpendicular to the axial direction of the connecting tube 2, and the through hole passes through the inner diameter of the connecting tube 2. A block 51 is slidably penetrated in the through hole, and a filter element 52 for filtering the gas passing through the connecting tube 2 is installed on the block 51.

[0038] Furthermore, in this embodiment, the filter element 52 is composed of a cover shell 521, a dust screen 522 and an activated carbon filter pad 523, wherein the cover shell 521 is detachably arranged in the mounting hole, the dust screen 522 is detachably installed on the side of the cover shell 521 away from the pump body 1, and a plurality of activated carbon filter pads 523 are installed on the side of the cover shell 521 close to the pump body 1, and the plurality of activated carbon filter pads 523 in the same cover shell 521 are respectively used for filtering out fine particles in the gas, and adsorbing harmful substances and harmful gases in the gas.

[0039] In the specific implementation process, when the pump body 1 is used to extract gas in industrial or chemical production, the gas passes through the filter element 52. During this period, the particulate impurities in the gas can be filtered out by the dust screen 522, and then the fine particles, harmful substances and harmful gases in the gas can be filtered out by multiple activated carbon filter pads 523, so that the pump body 1 extracts the filtered gas, thereby preventing the particulate matter and harmful substances in the gas from entering the pump body 1 and causing malfunctions, so as to extend the service life of the pump body 1; and the filtered gas can be directly discharged into the air to avoid residual harmful substances and harmful gases in the gas from polluting the environment.

[0040] It should be supplemented that a plurality of mounting holes equidistantly distributed along the length direction of the block 51 are provided, and a plurality of filter elements 52 are provided, and the plurality of filter elements 52 are detachably arranged in the plurality of mounting holes; the filter elements 52 in different mounting holes are respectively used to filter gases in different scenarios. Specifically, the plurality of filter elements 52 distributed along the length direction of the block 51 are respectively used to filter gases containing particles such as dust, gases containing odors, and gases containing harmful substances and harmful gases, so that the pump body 1 can push the block 51 when extracting gas in different scenarios, so that the block 51 slides in the through hole and drives the filter element 52 with corresponding filtering function to overlap with the connecting tube 2, and then the filtering effect on the gas can be adjusted according to actual needs, so as to adapt to different usage scenarios and be convenient to operate.

[0041] Reference Figure 4 and Figure 5As shown, in order to prevent the filter element 52 from being unable to overlap with the connecting tube 2 after the block 51 moves and thus affecting the filtering effect on the gas, in this embodiment, both side walls in the thickness direction of the block 51 are provided with a plurality of positioning groups corresponding to the positions of the mounting holes, each positioning group includes two connecting grooves 511 opened on the side wall of the block 51, and the two connecting grooves 511 of each positioning group are horizontally distributed and symmetrically distributed along the mounting hole, a top block 513 is provided in the connecting groove 511 through a supporting spring rod 512, and two fixing blocks 514 corresponding to the positions of the top block 513 are installed on the outer wall of the connecting tube 2, and the top block 513 is away from the supporting spring rod 512. One side is hemispherical, and a groove matching with the top block 513 is formed on the side of the fixed block 514 close to the stopper 51; the support spring rod 512 always applies a top extension force to the top block 513, so that the top block 513 has a tendency to move away from the connecting groove 511. When the fixed block 514 coincides with the top block 513, the top block 513 is abutted in the groove under the action of the support spring rod 512. Therefore, when the stopper 51 is pushed to make the filter element 52 coincide with the connecting tube 2, the stopper 51 can be limited by the mutual cooperation of the top block 513 and the groove, so as to prevent the stopper 51 from moving arbitrarily and affecting the normal filtering of the gas in the connecting tube 2 by the filter element 52.

[0042] Reference Figure 6 As shown, since the gas generated in industrial or chemical production may contain harmful substances or harmful gases, the filter element 52 cannot completely remove the harmful substances or harmful gases in the gas. Based on this, in the present embodiment, the interior of the filter element 52 for filtering harmful substances and harmful gases is a hollow structure, and a blocking net 524 is provided on the side of the filter element 52 away from the dust screen 522. A through hole 525 for quickly installing or removing the blocking net 524 is provided at the upper end of the block 51. Storage chambers 526 corresponding to the position of the filter element 52 are provided at both the upper and lower ends of the block 51. A plurality of atomization holes 527 are provided inside the storage chamber 526 and the filter element 52, and a sealing plate is detachably installed inside the storage chamber 526, and the sealing plate is flush with the side wall of the block 51.

[0043] Furthermore, in the present embodiment, a liquid storage tank 528 is installed on the side wall of the block 51, and an alkaline solution for filtering harmful substances and harmful gases in the gas is stored in the liquid storage tank 528. An air suction pump 529 and an exhaust pump 530 are installed at both the upper and lower ends of the liquid storage tank 528. The input end of the air suction pump 529 is connected to the storage chamber 526 extending above the block 51, and the output end of the air suction pump 529 extends to the liquid storage tank 528. The input end of the exhaust pump 530 extends to the liquid storage tank 528, and the output end of the exhaust pump 530 extends to the storage chamber 526 below the block 51. The output end of the exhaust pump 530 is installed with an atomizing head 531, which is used to spray the liquid in the liquid storage tank 528 in the form of atomization through the storage chamber 526 into the inside of the filter element 52 to intercept and filter the gas.

[0044] When filtering the gas generated in industrial or chemical production, the block 51 is pushed so that the block 51 drives the filter element 52 for filtering harmful substances and harmful gases to overlap with the connecting tube 2, and then the vacuum pump 529 and the exhaust pump 530 are started. The exhaust pump 530 extracts the liquid in the liquid storage tank 528 and atomizes the liquid through the atomizing head 531 and discharges it into the storage chamber 526 below the block 51; the water mist in the storage chamber 526 below the block 51 rises to the inside of the filter element 52 along the atomizing hole 527. At the same time, the vacuum pump 529 extracts gas to generate negative pressure in the storage chamber 526 above the block 51, so that the water mist inside the filter element 52 can rise to the storage chamber 526 above the block 51 along the atomizing hole 527, so that the vacuum pump 529 draws the water mist above the block 51 back to the liquid storage tank 528 for reuse.

[0045] During this period, when the gas entering the connecting cylinder 2 passes through the water mist, the water mist can fully react with the harmful substances in the gas, so as to remove the harmful substances and harmful gases, thereby intercepting and filtering the gas through the water mist, which can ensure the filtering strength of the gas; in addition, when the pump body 1 draws gas, the gas in the connecting cylinder 2 is quickly extracted. At this time, the filtered gas in the connecting cylinder 2 and some water mist that has not risen in time are extracted together and pass through the blocking net 524. The filtered gas can be further filtered through the blocking net 524 to adsorb the reacted particulate matter in the gas, further ensuring the filtering effect of the harmful gas; the blocking net 524 needs to be replaced and cleaned regularly during use to ensure the filtering strength of the blocking net 524 for harmful gases.

[0046] Reference Figure 7 , Figure 8 and Fig. 9 As shown, since the pump body 1 needs to have different air extraction efficiencies in different usage scenarios, by reducing the diameter of the air inlet of the pump body 1, the cross-sectional area of ​​the gas at the air inlet becomes smaller, and the flow rate will increase accordingly, thereby increasing the flow rate of the gas entering the pump body 1, thereby increasing the air extraction efficiency of the pump body 1; based on this, in this embodiment, the diameter of the air inlet end of the pump body 1 can also be adjusted accordingly, as follows: The air inlet diameter adjustment unit 6 includes an annular spring piece 61 installed inside the air inlet end of the pump body 1. The annular spring piece 61 is covered on the outside of the impeller 11, and an annular elastic pad 62 is installed between the two ends of the annular spring piece 61 and the inner wall of the air inlet end of the pump body 1. The annular elastic pad 62 and the annular spring piece 61 are used to guide the gas extracted by the pump body 1, and the diameter of the annular spring piece 61 is the diameter of the air inlet of the pump body 1. In addition, the annular elastic pad 62 and the annular spring piece 61 can both undergo elastic deformation under the action of external force.

[0047] Furthermore, in the present embodiment, a plurality of annularly distributed threaded rods 63 are penetrated through the side wall of the air inlet end of the pump body 1 by means of a threaded connection, and an end of the threaded rod 63 close to the impeller 11 is rotatably installed with an extrusion pad 64 resting against the outer wall of the annular spring piece 61, and a plurality of sleeves 65 movably sleeved on the outer wall of the threaded rod 63 are rotatably installed on the outer side wall of the air inlet end of the pump body 1, and the plurality of sleeves 65 are connected by a circular conveyor belt 66. Through the setting of the circular conveyor belt 66, the plurality of sleeves 65 can rotate synchronously, and a linkage gear 67 is sleeved on the outer wall of any one of the conveyor belts, and a positioning motor 68 is installed on the outer side wall of the air inlet end of the pump body 1 through a motor seat, and a driving gear 69 meshing with the linkage gear 67 is sleeved on the output end of the positioning motor 68.

[0048] It should be noted that the compression pad 64 fits the outer wall of the annular spring sheet 61 . Since the annular spring sheet 61 is elastic, there is friction between the annular spring sheet 61 and the compression pad 64 , so that the rotation of the threaded rod 63 cannot drive the compression pad 64 to rotate.

[0049] Furthermore, in this embodiment, a longitudinal groove 70 parallel to the axis of the threaded rod 63 is provided, and a key tooth 71 slidably docked in the longitudinal groove 70 is provided on the inner wall of the sleeve 65. The sleeve 65 can drive the threaded rod 63 to rotate through the mutual cooperation between the key tooth 71 and the longitudinal groove 70, but the sleeve 65 will not affect the movement of the threaded rod 63 along its axial direction during rotation.

[0050] During the specific implementation process, if the impeller 11 is adjusted to the maximum speed and it is necessary to further improve the suction efficiency and vacuum degree of the pump body 1, it is necessary to adjust the diameter of the air inlet of the pump body 1. At this time, the positioning motor 68 is started, and the positioning motor 68 drives the driving gear 69 to rotate. The driving gear 69 drives the sleeve 65 and the threaded rod 63 to rotate forward through the linkage gear 67, so that the threaded rod 63 drives the extrusion pad 64 to move toward the side close to the impeller 11, so that the extrusion pad 64 drives the annular spring piece 61 to shrink toward the side close to the impeller 11. During this period, the annular elastic pad 62 shrinks adaptively, thereby reducing the diameter of the air inlet of the pump body 1, and then increasing the flow rate of the gas when passing through the air inlet of the pump body 1, so that the gas is more concentrated when entering the pump body 1. When the gas flows in a smaller channel, the air flow turbulence and energy loss are reduced, which is beneficial to improve the strength of the pump body 1 to extract the gas when the impeller 11 is at the maximum speed, and can effectively improve the suction efficiency and vacuum degree of the pump body 1.

[0051] On the contrary, when the positioning motor 68 drives the linkage gear 67, the sleeve 65 and the threaded rod 63 to rotate in the opposite direction through the driving gear 69, the threaded rod 63 drives the extrusion pad 64 to move to the side away from the impeller 11, and the annular spring piece 61 and the annular elastic pad 62 expand adaptively. At this time, the diameter of the air inlet of the pump body 1 can be increased according to actual needs, so that it can be used for vacuum treatment in different scenarios.

[0052] During operation: Step 1: Before using the pump body 1, first connect the interface 31 of the pump body 1 to the input pipe, then start the pump body 1, control the impeller 11 inside the pump body 1 to rotate and generate negative pressure at its air inlet end, and the pump body 1 extracts the gas in the working container through the input pipe.

[0053] Step 2: When the pump body 1 draws gas, the gas passes through the filter element 52. During this period, particulate impurities in the gas can be filtered out through the dust screen 522, and then fine particles, harmful substances and harmful gases in the gas can be filtered out through multiple activated carbon filter pads 523, so that the pump body 1 draws filtered gas; the filtered gas can be directly discharged into the air to avoid residual harmful substances and harmful gases in the gas from polluting the environment.

[0054] Step 3: When filtering the gas generated in industrial or chemical production, push the block 51 so that the block 51 drives the filter element 52 for filtering harmful substances and harmful gases to overlap with the connecting tube 2, and then start the vacuum pump 529 and the exhaust pump 530. The exhaust pump 530 extracts the liquid in the liquid storage tank 528 and atomizes the liquid through the atomizing head 531 and discharges it into the storage chamber 526 below the block 51; the water mist in the storage chamber 526 below the block 51 rises along the atomizing hole 527 to the inside of the filter element 52, and the vacuum pump 529 draws the water mist above the block 51 back to the liquid storage tank 528 for reuse.

[0055] During this period, when the gas entering the connecting cylinder 2 passes through the water mist, the water mist can fully react with the harmful substances in the gas, so as to remove the harmful substances and harmful gases, thereby intercepting and filtering the gas through the water mist, thereby ensuring the filtering intensity of the gas; in addition, when the pump body 1 draws gas, the gas in the connecting cylinder 2 is quickly extracted. At this time, the filtered gas in the connecting cylinder 2 and some of the water mist that has not risen in time are extracted together and pass through the blocking net 524. The filtered gas can be further filtered through the blocking net 524 to adsorb the reacted particulate matter in the gas, thereby further ensuring the filtering effect of harmful gases.

[0056] Step 4: When it is necessary to adjust the diameter of the air inlet of the pump body 1, start the positioning motor 68, and the positioning motor 68 drives the driving gear 69 to rotate. The driving gear 69 drives the sleeve 65 and the threaded rod 63 to rotate forward through the linkage gear 67, so that the threaded rod 63 drives the extrusion pad 64 to move toward the side close to the impeller 11, so that the extrusion pad 64 drives the annular spring piece 61 to shrink toward the side close to the impeller 11. During this period, the annular elastic pad 62 shrinks adaptively, thereby reducing the diameter of the air inlet of the pump body 1, and then increasing the flow rate of the gas when passing through the air inlet of the pump body 1, so that the gas is more concentrated when entering the pump body 1, reducing air flow turbulence and energy loss, which is beneficial to improving the strength of the impeller 11 to extract gas, and can effectively improve the air extraction efficiency and vacuum degree of the pump body 1.

[0057] On the contrary, when the positioning motor 68 drives the linkage gear 67, the sleeve 65 and the threaded rod 63 to rotate in the opposite direction through the driving gear 69, the threaded rod 63 drives the extrusion pad 64 to move to the side away from the impeller 11, and the annular spring piece 61 and the annular elastic pad 62 expand adaptively. At this time, the diameter of the air inlet of the pump body 1 can be increased according to actual needs, so that it can be used for vacuum treatment in different scenarios.

[0058] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A multifunctional integrated high-speed centrifugal vacuum pump, characterized in that: include: A pump body (1) is installed inside the casing (12); An air intake valve (3) is mounted on the air intake end of the pump body (1) via a connecting tube (2); an upper end of the air intake valve (3) is provided with an interface (31) for connecting to an input pipeline; An exhaust pipe (4) is arranged at the exhaust end of the pump body (1), and an end of the exhaust pipe (4) away from the pump body (1) passes through the casing (12) and then extends to the outside; A filter unit (5) is mounted on the connecting tube (2) and is used to filter the gas sucked into the pump body (1); An air inlet diameter adjustment unit (6) is arranged at the air inlet end of the pump body (1) and is used to adjust the diameter of the air inlet of the pump body (1) so as to adjust the flow rate of gas entering the pump body (1) as well as the air extraction efficiency and vacuum degree.

2. A multifunctional integrated high-speed centrifugal vacuum pump according to claim 1, characterized in that: The filter unit (5) comprises a through hole formed on the connecting cylinder (2), a stopper (51) being slidably inserted into the through hole, and a filter element (52) for filtering gas passing through the connecting cylinder (2) being mounted on the stopper (51).

3. A multifunctional integrated high-speed centrifugal vacuum pump according to claim 2, characterized in that: The filter element (52) is composed of a cover shell (521), a dust screen (522), and an activated carbon filter pad (523), wherein the cover shell (521) is detachably arranged in the mounting hole, a side of the cover shell (521) away from the pump body (1) is detachably mounted with the dust screen (522), and a side of the cover shell (521) close to the pump body (1) is mounted with a plurality of activated carbon filter pads (523).

4. A multifunctional integrated high-speed centrifugal vacuum pump according to claim 2, characterized in that: The stopper (51) is provided with a plurality of mounting holes which are equidistantly distributed along its length direction. There are a plurality of filter cores (52), and the plurality of filter cores (52) are respectively disposed in the plurality of mounting holes in a detachable manner.

5. The multifunctional integrated high-speed centrifugal vacuum pump according to claim 2, characterized in that: Both side walls of the stopper (51) in the thickness direction are provided with a plurality of positioning groups corresponding to the positions of the mounting holes, each positioning group comprising two connecting grooves (511) opened on the side walls of the stopper (51), a top block (513) being provided in the connecting groove (511) via a supporting spring rod (512), and two fixing blocks (514) matching the positions of the top blocks (513) being installed on the outer wall of the connecting tube (2).

6. The multifunctional integrated high-speed centrifugal vacuum pump according to claim 3, characterized in that: One of the filter elements (52) has a hollow structure inside, a blocking net (524) is provided on a side of the filter element (52) away from the dust blocking net (522), storage cavities (526) corresponding to the position of the filter element (52) are provided at both upper and lower ends of the block (51), and a plurality of atomization holes (527) are provided inside the storage cavity (526) and the filter element (52); A liquid storage box (528) is installed on the side wall of the stopper (51), and an air suction pump (529) and an air exhaust pump (530) are installed at both the upper and lower ends of the liquid storage box (528) for spraying the liquid in the liquid storage box (528) through the storage cavity (526) into the interior of the filter element (52) in the form of atomization to filter the gas by interception.

7. The multifunctional integrated high-speed centrifugal vacuum pump according to claim 1, characterized in that: The air inlet caliber adjustment unit (6) comprises an annular spring piece (61) installed inside the air inlet end of the pump body (1), the annular spring piece (61) is covered outside the impeller (11), and an annular elastic pad (62) is installed between the two ends of the annular spring piece (61) and the inner wall of the air inlet end of the pump body (1).

8. The multifunctional integrated high-speed centrifugal vacuum pump according to claim 7, characterized in that: The pump body (1) has a plurality of threaded rods (63) distributed in an annular manner through a threaded connection on the side wall of the air inlet end. The end of the threaded rod (63) close to the impeller (11) is rotatably mounted with a compression pad (64) that abuts against the outer wall of the annular spring sheet (61). The outer wall of the air inlet end of the pump body (1) has a plurality of sleeves (65) movably mounted on the outer walls of the threaded rods (63). The plurality of sleeves (65) are connected by a circular conveyor belt (66). The outer wall of any conveyor belt is sleeved with a linkage gear (67). The outer wall of the air inlet end of the pump body (1) is mounted with a positioning motor (68) through a motor seat. The output end of the positioning motor (68) is sleeved with a driving gear (69) that meshes with the linkage gear (67).

9. The multifunctional integrated high-speed centrifugal vacuum pump according to claim 8, characterized in that: The threaded rod (63) is provided with a longitudinal sliding groove (70) parallel to the axis thereof, and the inner wall of the sleeve (65) is provided with a key tooth (71) slidably docked in the longitudinal sliding groove (70).

10. The multifunctional integrated high-speed centrifugal vacuum pump according to claim 1, characterized in that: A stepped cylinder (32) is installed at the upper end of the interface (31), and the stepped cylinder (32) is composed of a plurality of fixed cylinders with different diameters, and a threaded groove is provided on the outer wall of each fixed cylinder for connecting to input pipes of different specifications.

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