A Roots pump with strong suction force for sewage suction

Abstract

The present invention relates to the field of Roots pumps, in particular to a strong suction Roots pump for sewage suction, comprising a purification mechanism, which is used for impurity removal and vacuum treatment of sewage, wherein the bottom of the purification mechanism is fixedly connected with a water inlet pipe; the bottom of the water inlet pipe is fixedly connected with a central pump body, and the two ends of the central pump body are symmetrically connected with a No. 1 end cover and a No. 2 end cover, respectively, and the bottom of the central pump body is fixedly connected with a bracket and a water outlet pipe, respectively, and the interior of the central pump body is respectively provided with a No. 1 rotor assembly and a No. 2 rotor assembly; wherein the No. 2 rotor assembly comprises a No. 2 rotating shaft, and the outer side of the No. 2 rotating shaft is fixedly connected with a rotor member, and the two ends of the No. 2 rotating shaft are respectively extruded and adapted with a No. 3 bearing and a No. 4 bearing, and the strong suction Roots pump for sewage suction has an inner aperture of a tapered hole larger than its outer aperture, so as to make it difficult for impurities discharged from a filter pocket to flow back into the filter pocket.

Description

Technical Field

[0001] The present invention relates to the technical field of Roots pumps, and specifically to a Roots pump with strong suction for sewage suction. Background Art

[0002] A Roots vacuum pump (abbreviation: Roots pump) refers to a variable volume vacuum pump in which two leaf-shaped rotors that rotate synchronously in opposite directions are installed inside the pump, and there are small gaps between the rotors and between the rotors and the inner wall of the pump housing without contacting each other.

[0003] Roots vacuum pumps have withstood long-term operation tests on devices such as petroleum, chemical industry, plastics, pesticides, dynamic balancing of steam turbine rotors, and aerospace space simulation, so they should be vigorously promoted and applied in China. At the same time, they are also widely used in industries such as petroleum, chemical industry, metallurgy, and textiles. Vacuum pump accessories, as vacuum pump silencers, are used for noise control of vacuum pumps.

[0004] The existing Roots pumps have the following problems: 1. The gap between the rotor and the pump cavity of the Roots pump may increase due to wear, resulting in a decrease in sealing performance, thereby reducing the air extraction capacity; 2. There are impurities in the water, causing foreign objects such as metal particles and dust to enter the pump, resulting in the blockage of the gap between the rotor and the pump cavity, thereby preventing the rotor from rotating. Summary of the Invention

[0005] The present invention aims to provide a Roots pump with strong suction for sewage suction to solve the problems mentioned in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A Roots pump with strong suction for sewage suction includes a purification mechanism for removing impurities and evacuating sewage. A water inlet pipe is fixedly connected to the bottom of the purification mechanism.

[0007] The bottom of the water inlet pipe is fixedly connected to a central pump body. A first end cover and a second end cover are symmetrically connected to both ends of the central pump body respectively. A bracket and a water outlet pipe are fixedly connected to the bottom of the central pump body respectively. A first rotor assembly and a second rotor assembly are arranged inside the central pump body respectively.

[0008] The second rotor assembly includes a second rotating shaft. A rotor part is fixedly connected to the outer side of the second rotating shaft. A third bearing and a fourth bearing are respectively press-fitted at both ends of the second rotating shaft. A second fixing plate is press-fitted on the outer side of the third bearing. The second fixing plate is fixedly connected inside the first end cover. A second gear is fixedly connected to one end of the second rotating shaft close to the third bearing. A second limiting cover is fixedly connected to the end of the second gear away from the third bearing.

[0009] The outer side of the No. 4 bearing is extrusion-fitted with a No. 2 fixed ring, the No. 2 fixed ring is fixedly connected inside the No. 2 end cover, and one end of the No. 2 rotating shaft close to the No. 4 bearing is fixedly connected with a shaft coupling sleeve.

[0010] Preferably, the No. 1 rotor assembly includes a No. 1 rotating shaft, a No. 1 rotor is fixedly connected to the outer side of the No. 1 rotating shaft, the outer side of the No. 1 rotor is slidably connected to the inner wall of the central pump body, both ends of the No. 1 rotating shaft are extrusion-fitted with a No. 1 bearing and a No. 2 bearing respectively, the outer side of the No. 1 bearing is extrusion-fitted with a No. 1 fixed plate, the No. 1 fixed plate is fixedly connected inside the No. 2 end cover, and one end of the No. 1 rotating shaft close to the No. 1 bearing is fixedly connected with an external protection plate.

[0011] Preferably, the outer side of the No. 2 bearing is extrusion-fitted with a No. 1 fixed ring, the No. 1 fixed ring is fixedly connected inside the No. 1 end cover, one end of the No. 1 rotating shaft close to the No. 2 bearing is fixedly connected with a No. 1 gear, the outer side of the No. 1 gear is meshed and driven with a No. 2 gear, and one end of the No. 1 gear away from the No. 1 rotating shaft is fixedly connected with a No. 1 limit cover.

[0012] Preferably, the rotor part includes a No. 2 rotor, the No. 2 rotor is slidably connected to the inner wall of the central pump body, the inner side of the No. 2 rotor is fixedly connected with a No. 2 rotating shaft, a No. 1 embedded pipe and a No. 2 embedded pipe are respectively fixedly connected to the outer side of the No. 2 rotor, a No. 1 groove is formed in the inner wall of the No. 1 embedded pipe, and a No. 1 sliding block is slidably fitted inside the No. 1 groove. One end of the No. 1 sliding block away from the No. 1 groove is fixedly connected with a No. 1 moving column, a No. 1 magnet is fixedly connected to the bottom end of the No. 1 moving column, a No. 2 magnet is arranged at one end of the No. 1 magnet away from the No. 1 moving column, and the No. 2 magnet is fixedly connected to the bottom of the inner cavity of the No. 1 embedded pipe.

[0013] Preferably, one end of the No. 1 moving column away from the No. 1 magnet is fixedly connected with a No. 1 hinge joint, one end of the No. 1 hinge joint away from the No. 1 moving column is fixedly connected with a No. 1 flexible piece, the outer side of the No. 1 flexible piece is extrusion-fitted with the No. 1 rotor, both ends of the No. 1 flexible piece are rotatably connected with a No. 1 support, and the No. 1 support is fixedly connected to the outer side of the No. 2 rotor.

[0014] Preferably, a No. 2 groove is formed in the No. 2 embedded pipe, a No. 2 sliding block is slidably fitted inside the No. 2 groove, one end of the No. 2 sliding block away from the No. 2 groove is fixedly connected with a No. 2 moving column, a No. 3 magnet is fixedly connected to the bottom end of the No. 2 moving column, a No. 4 magnet is arranged at one end of the No. 3 magnet away from the No. 2 moving column, and the No. 4 magnet is fixedly connected to the bottom of the inner cavity of the No. 2 embedded pipe.

[0015] Preferably, the top of the No. 2 shift column is fixedly connected with a No. 2 hinge head, the top of the No. 2 hinge head is fixedly connected with a No. 2 flexure, the outer side of the No. 2 flexure is extruded and adapted with the inner wall of the central pump body, both ends of the No. 2 flexure are rotatably connected with a No. 2 support, and the No. 2 support is fixedly connected to the outer side of the No. 2 rotor.

[0016] Preferably, the purification mechanism includes a circulation pipe, the bottom of which is fixedly connected to the water inlet pipe, an exhaust assembly is fixedly installed on the outer side of the circulation pipe, an arc-shaped filter is fixedly connected to the inside of the circulation pipe, a drainage plate is fixedly connected to the bottom of the inner cavity of the circulation pipe, a filter pocket is fixedly connected to the outer side of the circulation pipe, a conical hole is opened on the surface of the filter pocket, and a drainage platform is fixedly connected to the bottom of the filter pocket.

[0017] Preferably, the outer side of the filter pocket is fixedly connected to an external tube, the bottom of the external tube is fixedly connected to a return pipe, one end of the return pipe away from the external tube is fixedly connected to the outer side of the flow tube, the outer side of the external tube is plugged with a panel, the inner side of the panel is fixedly connected to a debris receiving basket, and the surface of the debris receiving basket is provided with a bottom hole.

[0018] Preferably, the vacuum assembly includes a ring seat, which is fixedly connected to the top of the inner cavity of the circulation tube, and the bottom of the ring seat is rotatably connected to a force-bearing plate, the outer side of the force-bearing plate is fixedly connected to a spring, and the end of the spring away from the force-bearing plate is fixedly connected to the circulation tube, the outer side of the force-bearing plate is extruded and adapted with a curved block, and the outer side of the curved block is fixedly connected with a reset spring bar, and the end of the reset spring bar away from the curved block is fixedly connected to the circulation tube, a limiting rod is inserted into the interior of the curved block, and the limiting rod is fixedly connected to the inner side of the circulation tube, and the outer side of the curved block is slidably adapted with a small vacuum pump, and the small vacuum pump is fixedly connected to the outer side of the circulation tube.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The inner diameter of the tapered hole should be larger than its outer diameter. The purpose of this is to make it difficult for impurities discharged from the filter bag to flow back into the filter bag. In addition, the panel is inserted on the outside of the external pipe, so the operator can regularly pull out the panel and connect it to the debris basket for cleaning.

[0021] 2. By moving the curved block away from the small vacuum pump, the small vacuum pump will be connected to the flow pipe, thereby extracting the gas in the water, while improving the vacuum efficiency of the Roots pump itself, reducing the impact of gas binding and energy loss, and also enhancing the operating stability, avoiding pressure fluctuations and reducing the wear between the gas and the inner wall of the Roots pump.

[0022] 3. By squeezing and bending inward through the first rotor, the part where the first flexible piece is in contact with the first rotor is made tight, but not overly tight, to achieve the function of compressing the air in the Roots pump body.

[0023] 4. By rotating the part where the second rotor is in contact with the inner wall of the central pump body, and discharging the air compressed by the first flexible piece and the first rotor outward, it serves to create a vacuum environment in the Roots pump and accelerate the discharge of sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the external structure of a strong suction Roots pump for sewage suction according to the present invention.

[0025] Figure 2 It is a schematic diagram of the sectional structure of the whole of the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the first rotor assembly of the present invention.

[0027] Figure 4 It is a schematic diagram of the structure of the second rotor assembly of the present invention.

[0028] Figure 5 It is a schematic diagram of the sectional structure of the second rotor assembly of the present invention.

[0029] Figure 6 It is a schematic diagram of the sectional structure of the first rotor assembly of the present invention.

[0030] Figure 7 It is a schematic diagram of the sectional structure of the rotor part of the present invention.

[0031] Figure 8 For the present invention Figure 7 An enlarged schematic diagram of part A.

[0032] Figure 9 It is an enlarged schematic diagram of some components of the rotor part of the present invention.

[0033] Figure 10 For the present invention Figure 9 An enlarged schematic diagram of part B.

[0034] Figure 11 It is a schematic diagram of the structure of the purification mechanism of the present invention.

[0035] Figure 12 It is a schematic diagram of the sectional structure of the purification mechanism of the present invention.

[0036] Figure 13 For the present invention Figure 12 An enlarged schematic diagram of part C.

[0037] Figure 14 It is a schematic cross-sectional structural diagram of the air extraction component of the present invention.

[0038] In the figure: 1, central pump body; 2, bracket; 3, water inlet pipe; 4, purification mechanism; 5, end cover No. 1; 6, end cover No. 2; 7, water outlet pipe; 8, rotor assembly No. 1; 9, rotor assembly No. 2; 81, shaft No. 1; 82, rotor No. 1; 83, bearing No. 1; 84, bearing No. 2; 85, fixed plate No. 1; 86, external guard plate; 87, fixed ring No. 1; 88, gear No. 1; 89, limit cover No. 1; 91, shaft No. 2; 92, rotor member; 93, bearing No. 3; 94, bearing No. 4; 95, fixed ring No. 2; 96, shaft sleeve; 97, fixed plate No. 2; 98, gear No. 2; 99, limit cover No. 2; 921, rotor No. 2; 922, embedded pipe No. 1; 923, slider No. 1; 924, shift column No. 1; 925, magnet No. 1; 926 , magnet No. 2; 927, hinge joint No. 1; 928, tack piece No. 1; 929, support No. 1; 901, embedded tube No. 2; 902, slot No. 2; 903, slider No. 2; 904, shift column No. 2; 905, magnet No. 3; 906, magnet No. 4; 907, hinge joint No. 2; 908, tack piece No. 2; 909, support No. 2; 41, flow pipe; 42, exhaust assembly ; 43. Arc filter; 44. Drainage plate; 45. Filter pocket; 46. Conical hole; 47. Drainage table; 48. External pipe; 49. Return pipe; 40. Panel; 401. Connector basket; 402. Bottom hole; 421. Ring seat; 422. Force plate; 423. Spring; 424. Curved block; 425. Reset spring strip; 426. Limiting rod; 427. Small vacuum pump. DETAILED DESCRIPTION

[0039] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. It should be noted that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0040] See also Figures 1 to 14 The present invention provides a technical solution: Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, it includes a purification mechanism 4, which is used for removing impurities and evacuating sewage, and a water inlet pipe 3 is fixedly connected to the bottom of the purification mechanism 4;

[0041] The bottom of the water inlet pipe 3 is fixedly connected to the central pump body 1. The two ends of the central pump body 1 are symmetrically connected to a first end cover 5 and a second end cover 6 respectively. The bottom of the central pump body 1 is fixedly connected to a bracket 2 and a water outlet pipe 7 respectively. A first rotor assembly 8 and a second rotor assembly 9 are arranged inside the central pump body 1.

[0042] Among them, the second rotor assembly 9 includes a second rotating shaft 91. A rotor member 92 is fixedly connected to the outer side of the second rotating shaft 91. A third bearing 93 and a fourth bearing 94 are respectively pressed and fitted at both ends of the second rotating shaft 91. A second fixed plate 97 is pressed and fitted on the outer side of the third bearing 93. The second fixed plate 97 is fixedly connected inside the first end cover 5. One end of the second rotating shaft 91 close to the third bearing 93 is fixedly connected to a second gear 98. A second limit cover 99 is fixedly connected to the end of the second gear 98 far from the third bearing 93. A second fixed ring 95 is pressed and fitted on the outer side of the fourth bearing 94. The second fixed ring 95 is fixedly connected inside the second end cover 6. One end of the second rotating shaft 91 close to the fourth bearing 94 is fixedly connected to a shaft coupling sleeve 96.

[0043] The first rotor assembly 8 includes a first rotating shaft 81. A first rotor 82 is fixedly connected to the outer side of the first rotating shaft 81. The outer side of the first rotor 82 is slidably connected to the inner wall of the central pump body 1. A first bearing 83 and a second bearing 84 are respectively pressed and fitted at both ends of the first rotating shaft 81. A first fixed plate 85 is pressed and fitted on the outer side of the first bearing 83. The first fixed plate 85 is fixedly connected inside the second end cover 6. One end of the first rotating shaft 81 close to the first bearing 83 is fixedly connected to an external protection plate 86. A first fixed ring 87 is pressed and fitted on the outer side of the second bearing 84. The first fixed ring 87 is fixedly connected inside the first end cover 5. One end of the first rotating shaft 81 close to the second bearing 84 is fixedly connected to a first gear 88. The outer side of the first gear 88 is meshed and driven with the second gear 98. A first limit cover 89 is fixedly connected to the end of the first gear 88 far from the first rotating shaft 81.

[0044] Such as Figure 7 、 Figure 8 、 Figure 9 and Figure 10As shown, the rotor member 92 includes a second rotor 921. The second rotor 921 is slidably connected to the inner wall of the central pump body 1. The inner side of the second rotor 921 is fixedly connected to a second rotating shaft 91. The outer side of the second rotor 921 is fixedly connected to a first embedded pipe 922 and a second embedded pipe 901 respectively. A first groove is formed in the inner wall of the first embedded pipe 922, and a first slider 923 is slidably fitted inside the first groove. One end of the first slider 923 away from the first groove is fixedly connected to a first moving column 924. The bottom end of the first moving column 924 is fixedly connected to a first magnet 925. One end of the first magnet 925 away from the first moving column 924 is provided with a second magnet 926. The second magnet 926 is fixedly connected to the bottom of the inner cavity of the first embedded pipe 922. One end of the first moving column 924 away from the first magnet 925 is fixedly connected to a first hinge joint 927. One end of the first hinge joint 927 away from the first moving column 924 is fixedly connected to a first flexible piece 928. The outer side of the first flexible piece 928 is in extrusion fit with the first rotor 82. Both ends of the first flexible piece 928 are rotatably connected to a first support 929. The first support 929 is fixedly connected to the outer side of the second rotor 921. By connecting the second rotating shaft 91 to an external motor and making it rotate forward, the second gear 98 fixedly connected to the outer side of the second rotating shaft 91 will rotate forward together. The outer side of the second gear 98 is meshed with the first gear 88 for transmission, so that the rotor member 92 fixedly connected to the outer side of the second rotating shaft 91 and the first rotor 82 fixedly connected to the outer side of the first rotating shaft 81 will rotate in the same direction and downward. However, during the rotation of the rotor member 92, the first moving column 924 inside it will move inward along the first groove through the first slider 923. At the same time, the distance between the first magnet 925 and the second magnet 926 will be shortened. The first magnet 925 and the second magnet 926 are in a repulsive relationship. The first hinge joint 927 fixedly connected to the outer end of the first moving column 924 will drive the first flexible piece 928 to be squeezed and bent inward by the first rotor 82, so that the part where the first flexible piece 928 is in extrusion fit with the first rotor 82 is tight and not in over-tight contact, so as to realize the function of compressing the air in the Roots pump body.

[0045] The interior of the second embedded pipe 901 is provided with a second groove 902. A second slider 903 is slidably fitted inside the second groove 902. One end of the second slider 903 away from the second groove 902 is fixedly connected to a second moving column 904. The bottom end of the second moving column 904 is fixedly connected to a third magnet 905. One end of the third magnet 905 away from the second moving column 904 is provided with a fourth magnet 906. The fourth magnet 906 is fixedly connected to the bottom of the inner cavity of the second embedded pipe 901. The top end of the second moving column 904 is fixedly connected to a second hinge joint 907. The top end of the second hinge joint 907 is fixedly connected to a second flexible piece 908. The outer side of the second flexible piece 908 is in extrusion fit with the inner wall of the central pump body 1. Both ends of the second flexible piece 908 are rotatably connected to second supports 909. The second supports 909 are fixedly connected to the outer side of the second rotor 921. The second flexible piece 908 that does not come into extrusion contact with the first rotor 82 will, under the repulsive force of the third magnet 905 and the fourth magnet 906, cause the second moving column 904 to move outward along the second groove 902 through the second slider 903. Subsequently, the second flexible piece 908 connected to the second moving column 904 through the second hinge joint 907 will bend outward and be in close fit with the inner wall of the central pump body 1. The fit here is not a tight contact. At this time, the part of the second rotor 921 in contact with the inner wall of the central pump body 1 will rotate, and the air compressed by the first flexible piece 928 and the first rotor 82 will be discharged outward, thereby achieving the purpose of creating a vacuum environment inside the Roots pump and accelerating the discharge of sewage outward. In addition, there are four contact points between the first rotor 82 and the second rotor 921, so the air inside the Roots pump can be discharged more quickly.

[0046] Such as Figure 11 , Figure 12 , Figure 13 And Figure 14As shown in the figure, the purification mechanism 4 includes a circulation pipe 41. The bottom of the circulation pipe 41 is fixedly connected to the water inlet pipe 3. An air extraction component 42 is fixedly installed on the outer side of the circulation pipe 41. An arc-shaped filter screen 43 is fixedly connected inside the circulation pipe 41. A drainage plate 44 is fixedly connected to the bottom of the inner cavity of the circulation pipe 41. A filter pocket 45 is fixedly connected to the outer side of the circulation pipe 41. A conical hole 46 is formed on the surface of the filter pocket 45. A drainage platform 47 is fixedly connected to the bottom of the filter pocket 45. An outer connection pipe 48 is fixedly connected to the outer side of the filter pocket 45. A return pipe 49 is fixedly connected to the bottom of the outer connection pipe 48. One end of the return pipe 49 away from the outer connection pipe 48 is fixedly connected to the outer side of the circulation pipe 41. A panel 40 is inserted into the outer side of the outer connection pipe 48. A impurity collection basket 401 is fixedly connected to the inner side of the panel 40. A bottom hole 402 is formed on the surface of the impurity collection basket 401. By introducing sewage from the top of the circulation pipe 41 and flowing along the drainage plate 44 into the inside of the circulation pipe 41, the drainage plate 44 serves to introduce the sewage towards the arc-shaped filter screen 43. At this time, the impurities in the sewage will be filtered by the arc-shaped filter screen 43. The arc-shaped filter screen 43 is in an arc shape, and its bottom end is relatively close to the connection part of the circulation pipe 41 and the water inlet pipe 3. Subsequently, the impurities and part of the water flow will be attracted by the arc-shaped filter screen 43 and enter into the filter pocket 45. At this time, the drainage platform 47 fixedly connected to the bottom of the filter pocket 45 will direct the impurities and part of the water towards the conical hole 46. The conical hole 46 is formed on the surface of the filter pocket 45, and the inner diameter of the conical hole 46 is larger than its outer diameter. The purpose of this is to make it difficult for the impurities discharged from the filter pocket 45 to flow back into the filter pocket 45. At this time, the impurities and water will enter into the outer connection pipe 48 through the conical hole 46. Then, the water flow will re-enter the circulation pipe 41 along the return pipe 49, while the impurities will be limited and caught by the impurity collection basket 401. The outer side of the impurity collection basket 401 is connected to the panel 40, and the panel 40 is inserted into the outer side of the outer connection pipe 48. Therefore, the operator can regularly extract the panel 40 to clean the impurity collection basket 401.

[0047] The air extraction assembly 42 includes an annular seat 421 which is fixedly connected to the top inside the flow pipe 41. A force-bearing plate 422 is rotatably connected to the bottom of the annular seat 421. A spring 423 is fixedly connected to the outer side of the force-bearing plate 422. The end of the spring 423 away from the force-bearing plate 422 is fixedly connected to the flow pipe 41. A curved surface block 424 is squeezed and adapted to the outer side of the force-bearing plate 422. A reset elastic strip 425 is fixedly connected to the outer side of the curved surface block 424. The end of the reset elastic strip 425 away from the curved surface block 424 is fixedly connected to the flow pipe 41. A limiting insertion rod 426 is inserted into the curved surface block 424. The limiting insertion rod 426 is fixedly connected to the inner side of the flow pipe 41. A small air extraction pump 427 is slidably adapted to the outer side of the curved surface block 424. The small air extraction pump 427 is fixedly connected to the outer side of the flow pipe 41. As water flows in the flow pipe 41, it will continuously impact the force-bearing plate 422. The impacted force-bearing plate 422 will deflect counterclockwise through the annular seat 421 and compress the spring 423. The spring 423 plays a role in resetting the force-bearing plate 422. At the same time, the rotating force-bearing plate 422 will also impact the curved surface block 424. The contact surface between the curved surface block 424 and the force-bearing plate 422 is a curved surface. The impacted curved surface block 424 will move downward along the limiting insertion rod 426 and stretch the reset elastic strip 425. The reset elastic strip 425 plays a role in resetting the curved surface block 424 until the small air extraction pump 427 originally blocked by the curved surface block 424 is connected to the flow pipe 41, thereby playing a role in pumping the gas in the water outwards, improving the air extraction efficiency of the roots pump itself, reducing the influence of air binding and energy loss, enhancing the operation stability, avoiding pressure fluctuations and reducing the wear between the gas and the inner wall of the roots pump, and also playing a role in maintaining the size of the gap between the rotor and the pump cavity of the roots pump, avoiding increasing the gap due to wear and reducing the sealing performance.

[0048] When the present invention is in use: First, sewage is introduced from the top of the flow pipe 41 and enters the interior of the flow pipe 41 along the diversion plate 44. At this time, impurities in the sewage will be filtered by the arc-shaped filter screen 43. Subsequently, the impurities and part of the water flow will enter the filter pocket 45. At this time, the diversion platform 47 fixedly connected to the bottom of the filter pocket 45 will divert the impurities and part of the water to the conical hole 46. Then, the impurities and water will enter the outer connection pipe 48 through the conical hole 46. Immediately afterwards, the water flow will re-enter the flow pipe 41 along the return pipe 49, while the impurities will be limited and caught by the impurity receiving basket 401. As the water flows in the flow pipe 41, it will continuously impact the force-receiving plate 422. The impacted force-receiving plate 422 will deflect counterclockwise through the ring seat 421 and compress the spring 423. At the same time, the rotating force-receiving plate 422 will also impact the curved surface block 424. The impacted curved surface block 424 will move downward along the limit insertion rod 426 and stretch the reset elastic strip 425 until the small air pump 427 originally blocked by the curved surface block 424 is connected to the flow pipe 41, thereby realizing the air extraction treatment.

[0049] By connecting the second rotating shaft 91 to an external motor and making it rotate forward, at this time, the second gear 98 fixedly connected to the outer side of the second rotating shaft 91 will rotate forward together. The outer side of the second gear 98 is meshed and driven with the first gear 88, so that the rotor member 92 fixedly connected to the outer side of the second rotating shaft 91 and the first rotor 82 fixedly connected to the outer side of the first rotating shaft 81 will rotate in a forward and downward direction. However, during the rotation of the rotor member 92, the first moving column 924 inside it will move inward along the first groove through the first slider 923. At the same time, the distance between the first magnet 925 and the second magnet 926 will be shortened, and the first hinge joint 927 fixedly connected to the outer end of the first moving column 924 will drive the first flexible piece 928 to be squeezed and bent inward by the first rotor 82.

[0050] The second flexible piece 908 that does not come into extrusion contact with the first rotor 82 will, under the repulsive force of the third magnet 905 and the fourth magnet 906, cause the second moving column 904 to move outward along the second groove 902 through the second slider 903. Subsequently, the second flexible piece 908 connected to the second moving column 904 through the second hinge joint 907 will bend outward and be squeezed and adapted to the inner wall of the central pump body 1.

[0051] The above-mentioned embodiments are only the preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Those of ordinary skill in the art, starting from the above-mentioned conceptions and without creative labor, all kinds of transformations made will fall within the scope of protection of the present invention.

Claims

1. A Roots pump with strong suction for sewage suction, characterized in that, Including: A purification mechanism (4) for removing impurities and evacuating sewage. A water inlet pipe (3) is fixedly connected to the bottom of the purification mechanism (4); The bottom of the water inlet pipe (3) is fixedly connected to a central pump body (1). A first end cover (5) and a second end cover (6) are symmetrically connected to both ends of the central pump body (1) respectively. A bracket (2) and a water outlet pipe (7) are fixedly connected to the bottom of the central pump body (1) respectively. A first rotor assembly (8) and a second rotor assembly (9) are arranged inside the central pump body (1); The second rotor assembly (9) includes a second rotating shaft (91). A rotor member (92) is fixedly connected to the outer side of the second rotating shaft (91). A third bearing (93) and a fourth bearing (94) are respectively press-fitted at both ends of the second rotating shaft (91). A second fixing plate (97) is press-fitted on the outer side of the third bearing (93). The second fixing plate (97) is fixedly connected inside the first end cover (5). A second gear (98) is fixedly connected to one end of the second rotating shaft (91) close to the third bearing (93). A second limiting cover (99) is fixedly connected to the end of the second gear (98) away from the third bearing (93); A second fixing ring (95) is press-fitted on the outer side of the fourth bearing (94). The second fixing ring (95) is fixedly connected inside the second end cover (6). A shaft coupling sleeve (96) is fixedly connected to one end of the second rotating shaft (91) close to the fourth bearing (94); The rotor member (92) includes a second rotor (921). The second rotor (921) is slidably connected to the inner wall of the central pump body (1). The inner side of the second rotor (921) is fixedly connected to the second rotating shaft (91). A first embedded pipe (922) and a second embedded pipe (901) are fixedly connected to the outer side of the second rotor (921) respectively. A first groove is formed in the inner wall of the first embedded pipe (922). A first sliding block (923) is slidably fitted inside the first groove. A first moving column (924) is fixedly connected to the end of the first sliding block (923) away from the first groove. A first magnet (925) is fixedly connected to the bottom end of the first moving column (924). A second magnet (926) is arranged at the end of the first magnet (925) away from the first moving column (924). The second magnet (926) is fixedly connected to the bottom of the inner cavity of the first embedded pipe (922); A first hinge joint (927) is fixedly connected to the end of the first moving column (924) away from the first magnet (925). A first flexible piece (928) is fixedly connected to the end of the first hinge joint (927) away from the first moving column (924). The outer side of the first flexible piece (928) is press-fitted with a first rotor (82). Both ends of the first flexible piece (928) are rotatably connected to a first support (929). The first support (929) is fixedly connected to the outer side of the second rotor (921); A second slot (902) is provided inside the second embedded pipe (901). A second slider (903) is slidably fitted inside the second slot (902). One end of the second slider (903) away from the second slot (902) is fixedly connected to a second moving column (904). A third magnet (905) is fixedly connected to the bottom end of the second moving column (904). A fourth magnet (906) is provided at one end of the third magnet (905) away from the second moving column (904). The fourth magnet (906) is fixedly connected to the bottom of the inner cavity of the second embedded pipe (901); The top end of the second moving column (904) is fixedly connected to a second hinge joint (907). The top end of the second hinge joint (907) is fixedly connected to a second flexible piece (908). The outer side of the second flexible piece (908) is in pressing fit with the inner wall of the central pump body (1). Both ends of the second flexible piece (908) are rotatably connected to second supports (909). The second supports (909) are fixedly connected to the outside of the second rotor (921); The purification mechanism (4) includes a flow pipe (41). The bottom of the flow pipe (41) is fixedly connected to the water inlet pipe (3). An air extraction component (42) is fixedly installed on the outside of the flow pipe (41). An arc-shaped filter screen (43) is fixedly connected inside the flow pipe (41). A drainage plate (44) is fixedly connected to the bottom of the inner cavity of the flow pipe (41). A filter pocket (45) is fixedly connected to the outside of the flow pipe (41). Conical holes (46) are provided on the surface of the filter pocket (45). A drainage platform (47) is fixedly connected to the bottom of the filter pocket (45); An outer connecting pipe (48) is fixedly connected to the outside of the filter pocket (45). A return pipe (49) is fixedly connected to the bottom of the outer connecting pipe (48). One end of the return pipe (49) away from the outer connecting pipe (48) is fixedly connected to the outside of the flow pipe (41). A plug board (40) is inserted into the outside of the outer connecting pipe (48). A impurity receiving basket (401) is fixedly connected to the inner side of the plug board (40). Bottom holes (402) are provided on the surface of the impurity receiving basket (401); The air extraction assembly (42) includes an annular seat (421). The annular seat (421) is fixedly connected to the top of the inner cavity of the flow pipe (41). A stress plate (422) is rotatably connected to the bottom of the annular seat (421). A spring (423) is fixedly connected to the outer side of the stress plate (422). One end of the spring (423) away from the stress plate (422) is fixedly connected to the flow pipe (41). A curved surface block (424) is extrusion-fitted to the outer side of the stress plate (422). A reset elastic strip (425) is fixedly connected to the outer side of the curved surface block (424). One end of the reset elastic strip (425) away from the curved surface block (424) is fixedly connected to the flow pipe (41). A limiting insertion rod (426) is inserted into the curved surface block (424). The limiting insertion rod (426) is fixedly connected to the inner side of the flow pipe (41). A small air pump (427) is slidably fitted to the outer side of the curved surface block (424). The small air pump (427) is fixedly connected to the outer side of the flow pipe (41).

2. The strong suction Roots pump for sewage suction according to claim 1, characterized in that: The first rotor assembly (8) includes a first rotating shaft (81). A first rotor (82) is fixedly connected to the outer side of the first rotating shaft (81). The outer side of the first rotor (82) is slidably connected to the inner wall of the central pump body (1). A first bearing (83) and a second bearing (84) are respectively extrusion-fitted to both ends of the first rotating shaft (81). A first fixing plate (85) is extrusion-fitted to the outer side of the first bearing (83). The first fixing plate (85) is fixedly connected to the inside of the second end cover (6). An external protection plate (86) is fixedly connected to one end of the first rotating shaft (81) close to the first bearing (83).

3. The strong suction Roots pump for sewage suction according to claim 2, characterized in that: A first fixing ring (87) is extrusion-fitted to the outer side of the second bearing (84). The first fixing ring (87) is fixedly connected to the inside of the first end cover (5). A first gear (88) is fixedly connected to one end of the first rotating shaft (81) close to the second bearing (84). The outer side of the first gear (88) is in meshing transmission with a second gear (98). A first limiting cover (89) is fixedly connected to one end of the first gear (88) away from the first rotating shaft (81).

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