Dust collection box for dry vacuum pump

Abstract

The invention provides a dust collection box for a dry vacuum pump, and relates to the technical field of vacuum pump parts, the dust collection box comprises equipment frame trusses and dust collection box modules, equipment frame supporting columns are fixedly mounted at the upper ends of the equipment frame trusses, and a plurality of equipment frame cross beams are fixedly mounted between the equipment frame trusses; a dust collection box mounting partition plate is fixedly mounted at the upper end of the equipment frame cross beam, and the dust collection box module is fixedly mounted on the dust collection box mounting partition plate; the vacuum pump transition air tank is arranged at the lower end of the dry vacuum pump, hot air generated around the dry vacuum pump is firstly filtered through the dust collection box module, then part of the hot air is collected to the air tank connecting pipe and enters the vacuum pump transition air tank, and heat preservation can be conducted on the dry vacuum pump through contact with the dry vacuum pump; compared with an existing vacuum pump dust collection box, the vacuum pump dust collection box has the advantages that preheating heat can be recycled, and the energy-saving and environment-friendly effects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum pump components, in particular to a dust collecting box for a dry vacuum pump. Background Art

[0002] An oil-free dry mechanical vacuum pump is a pump that can pump air from atmospheric pressure and discharge the pumped gas directly into the atmosphere. The pump chamber contains no oil or other working media, and the pump's ultimate pressure is equal to or close to that of an oil-sealed vacuum pump. To prevent excessive dust from entering the pumped air, vacuum pumps use dust collection boxes. Vacuum pumps generate a large amount of heat during operation, and if left unattended, this heat will dissipate invisibly and cannot be utilized. Summary of the Invention

[0003] In view of the deficiencies in the prior art, the present invention provides a dust collecting box for a dry vacuum pump, which solves the problems raised in the background art.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions: a dust collecting box for a dry vacuum pump, comprising an equipment frame truss and a dust collecting box module, an equipment frame support column is fixedly installed on the upper end of the equipment frame truss, a number of equipment frame beams are fixedly installed between the equipment frame trusses, a dust collecting box mounting partition is fixedly installed on the upper end of the equipment frame beam, and the dust collecting box module is fixedly installed on the dust collecting box mounting partition.

[0005] Preferably, a vacuum pump mounting base partition is fixedly installed on the upper end of the equipment frame truss, a vacuum pump mounting base is fixedly installed on the upper surface of the vacuum pump mounting base partition, and two vacuum pump transition gas tanks are fixedly installed on the upper end of the vacuum pump mounting base.

[0006] Preferably, a dry vacuum pump is fixedly installed on the upper end of the vacuum pump transition gas tank, and a gas tank connecting pipe is fixedly connected to the inner end of the vacuum pump transition gas tank.

[0007] Preferably, a vacuum pump installation side partition is fixedly installed between the equipment frame support columns.

[0008] Preferably, the dust collecting box module includes: a first dust collecting bellows, a second dust collecting bellows, a dust filter cabin group, a dust collecting bellows mounting lug, a diversion heat preservation gas tank fixing rod, a hot gas diversion heat preservation gas tank, and a diversion connecting pipe;

[0009] Dust collecting bellows mounting ears are fixedly installed on the sides of the first dust collecting bellows and the second dust collecting bellows, and the dust collecting bellows mounting ears are fixedly mounted on the equipment frame support column and the dust collecting box mounting partition respectively, and a dust filter cabin group is provided between the first dust collecting bellows and the second dust collecting bellows;

[0010] The internal structures of the first dust collecting bellows and the second dust collecting bellows are symmetrical about the center of the dust filter chamber group. A diversion insulation gas tank fixing rod is fixedly installed at the lower end of the second dust collecting bellows, and a hot gas diversion insulation gas tank is fixedly installed at the lower end of the diversion insulation gas tank fixing rod. Two diversion connecting pipes are fixedly connected to the outside of the hot gas diversion insulation gas tank.

[0011] Preferably, external partition nets are fixedly installed on the outside of the first dust collecting bellows and the second dust collecting bellows.

[0012] Preferably, the inner end of the diversion connecting pipe is fixedly connected to a gas tank connecting pipe.

[0013] Preferably, the first dust collecting bellows comprises: a dust collecting bellows housing, a dust collecting fan duct, a fan motor mounting bracket, a fan motor, fan blades, a fan rear duct, a dust collecting diversion hole, a dust collecting diversion pipe, and a dust collecting pipe opening;

[0014] A dust collecting fan duct is fixedly installed inside the dust collecting bellows housing, a fan motor mounting bracket is fixedly installed on the inner wall of the dust collecting fan duct, a fan motor is fixedly installed on the front end of the fan motor mounting bracket, and fan blades are fixedly installed on the output shaft of the fan motor;

[0015] A fan rear air duct is integrated inside the dust collecting fan duct, a dust collecting diversion hole is opened on the inner wall of the fan rear air duct, a dust collecting diversion pipe is integrated at the rear end of the dust collecting diversion hole, and a dust collecting pipe opening is integrated at the rear end of the dust collecting diversion pipe.

[0016] Preferably, the dust filter cabin group includes: a dust filter cartridge, a filter replacement window, a filter cabin cover, a dust collection variable diameter cover, a hot air return pipe, a diversion hole blocking platform, a flow-gathering and boosting ring cavity, an outer flow layer, an outer flow hole, a filter element fixing top platform, and an inner groove of the top platform;

[0017] A filter replacement window is provided at the upper end of the dust collecting filter cartridge, and dust collecting variable diameter covers are integrated on the outer sides of both ends of the dust collecting filter cartridge. A filter cabin cover is integrated on the outer side of the dust collecting variable diameter cover, and the filter cabin cover is fixed to the inner surface of the dust collecting bellows shell;

[0018] A diverter hole blocking platform is provided in the middle of the filter cabin cover tube, a filter element fixing top platform is integrated in the middle of the inner side of the diverter hole blocking platform, and a flow-gathering and pressurizing ring cavity is provided between the diverter hole blocking platform and the filter element fixing top platform;

[0019] An outer flow layer is provided between the outer side of the diverter hole blocking platform and the dust collecting variable diameter cover, an outer flow hole is provided inside the outer flow layer and located on the diverter hole blocking platform, and booster flow rings are integrated at both ends of the inner wall of the dust collecting filter cartridge;

[0020] The inner end of the filter element fixing top platform is provided with a top platform inner groove, the dust collecting filter element is fixedly installed in the dust collecting filter element barrel, and filter element mounting top shafts are provided at both ends of the dust collecting filter element, and the filter element mounting top shafts are arranged in the top platform inner groove.

[0021] Preferably, the filter cabin cover is located outside the opening of the dust collecting pipe, and a hot air return pipe is fixedly connected to the inner side of one of the filter cabin cover tubes.

[0022] The present invention provides a dust collecting box for a dry vacuum pump. It has the following beneficial effects:

[0023] (1) The present invention provides a vacuum pump transition gas tank at the lower end of the dry vacuum pump, and first filters the hot air generated around the dry vacuum pump through the dust collecting box module, and then collects a portion of the hot air into the gas tank connecting pipe and enters the vacuum pump transition gas tank. The hot air can be kept warm by contact with the dry vacuum pump and transported to other places to assist other equipment in preheating or heating. Compared with the existing vacuum pump dust collecting box, the present invention can recycle the preheated heat, which has the effect of energy saving and environmental protection;

[0024] (2) The present invention drives the fan blades to rotate by the fan motor in the second dust collecting wind box, and draws the hot air around the dry vacuum pump into the dust collecting fan duct under negative pressure. Then, the rear end of the fan rear duct is sealed by the diversion hole blocking table. The hot air can only enter the dust collecting diversion pipe through the dust collecting diversion hole. After the hot air is diverted, dust collection and filtration can be better performed.

[0025] (3) In the present invention, after the hot air comes out from the opening of the dust collecting pipe, it enters the focusing and boosting circle cavity through the outer flow layer and the outer flow hole, and changes the diameter and boosts the pressure through the gap between the inner filter element fixed top platform and the boosting flow circle in the focusing and boosting circle cavity. When passing through the dust collecting filter element, the dust can be better collected, and the hot air after filtration enters the hot gas diversion insulation tank through the hot air return pipe at the lower end, and then is connected to the tank connecting pipe through the diversion connecting pipe at the outer end of the hot gas diversion insulation tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a structural schematic diagram of another perspective of the present invention;

[0028] Figure 3 This is a structural diagram of the dust collection box module of the present invention;

[0029] Figure 4 This is a structural diagram of the dust collection box module of the present invention from another perspective;

[0030] Figure 5Schematic diagram of the structure of the first dust collecting bellows in the present invention;

[0031] Figure 6 Schematic diagram of the side structure of the first dust collecting bellows in the present invention;

[0032] Figure 7 For the present invention Figure 6 Schematic diagram of the cross-sectional structure along line aa;

[0033] Figure 8 Schematic diagram of the structure of the dust filter cabin group in the present invention;

[0034] Figure 9 Schematic diagram of the side view of the dust filter cabin group in the present invention;

[0035] Figure 10 For the present invention Figure 9 Schematic diagram of the cross-sectional structure along the bb line.

[0036] Among them, 1. Equipment frame truss; 2. Equipment frame support column; 3. Dust box installation partition; 4. Dust box module; 401. First dust box; 4011. Dust box shell; 4012. Dust fan duct; 4013. Fan motor mounting bracket; 4014. Fan motor; 4015. Fan blades; 4016. Fan rear duct; 4017. Dust diversion hole; 4018. Dust diversion duct; 4019. Dust duct opening; 402. Second dust box; 403. Dust filter cabin group; 4031. Dust filter cartridge; 4032. Filter cartridge replacement window; 4033. Filter cabin cover; 4034. Dust reducer cover; 4035. Hot air return pipe; 4 036. Diversion hole plugging platform; 4037. Converging and boosting ring cavity; 4038. Outer flow layer; 4039. Outer flow hole; 40310. Filter element fixing top platform; 40311. Booster flow ring; 40312. Top platform inner groove; 40313. Dust collecting filter element; 40314. Filter element installation top shaft; 404. Dust collecting bellows installation ear; 405. Diversion insulation gas tank fixing rod; 406. Hot gas diversion insulation gas tank; 407. External partition net; 408. Diversion connecting pipe; 5. Vacuum pump installation base partition; 6. Vacuum pump installation base; 7. Vacuum pump transition gas tank; 8. Dry vacuum pump; 9. Vacuum pump installation side partition; 10. Equipment frame beam; 11. Gas tank connecting pipe. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, 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 efforts are within the scope of protection of the present invention.

[0038] like Figures 1 to 2 As shown, an embodiment of the present invention provides a dust collecting box for a dry vacuum pump, comprising an equipment frame truss 1 and a dust collecting box module 4, wherein the upper end of the equipment frame truss 1 is fixedly installed with an equipment frame support column 2, and a plurality of equipment frame beams 10 are fixedly installed between the equipment frame trusses 1, and the upper end of the equipment frame beam 10 is fixedly installed with a dust collecting box mounting partition 3, and the dust collecting box module 4 is fixedly installed on the dust collecting box mounting partition 3, and the upper end of the equipment frame truss 1 is fixedly installed with a vacuum pump mounting base partition 5, and the upper end surface of the vacuum pump mounting base partition 5 is fixedly installed with a vacuum pump mounting base 6, and two vacuum pump transition gas tanks 7 are fixedly installed on the upper end of the vacuum pump transition gas tank 7, and a dry vacuum pump 8 is fixedly installed on the upper end of the vacuum pump transition gas tank 7, and the inner end of the vacuum pump transition gas tank 7 is fixedly connected with a gas tank connecting pipe 11, and a vacuum pump mounting side partition 9 is fixedly installed between the equipment frame support columns 2.

[0039] In the above technical solution, a vacuum pump transition gas tank 7 is provided at the lower end of the dry vacuum pump 8, and the hot air generated around the dry vacuum pump 8 is first filtered through the dust collecting box module 4, and then a part of the hot air is collected into the gas tank connecting pipe 11 and enters the vacuum pump transition gas tank 7. It can be kept warm through contact with the dry vacuum pump 8 and transported to other places to assist other equipment in preheating or heating. Compared with the existing vacuum pump dust collecting box, it can recycle the preheated heat and has the effect of energy saving and environmental protection.

[0040] like Figure 1 、 Figure 3 、 Figure 4As shown, the dust collecting box module 4 includes: a first dust collecting wind box 401, a second dust collecting wind box 402, a dust filter cabin group 403, a dust collecting wind box mounting ear 404, a shunt insulation gas tank fixing rod 405, a hot gas shunt insulation gas tank 406, and a shunt connecting pipe 408; the first dust collecting wind box 401 and the second dust collecting wind box 402 are fixedly installed with a dust collecting wind box mounting ear 404 on the side, and the dust collecting wind box mounting ear 404 is respectively fixedly installed on the equipment frame support column 2 and the dust collecting box mounting partition 3, and a dust filter cabin group is provided between the first dust collecting wind box 401 and the second dust collecting wind box 402. 403; The internal structures of the first dust collecting bellows 401 and the second dust collecting bellows 402 are symmetrical about the center of the dust filter chamber group 403, and the lower end of the second dust collecting bellows 402 is fixedly installed with a diversion insulation gas tank fixing rod 405, and the lower end of the diversion insulation gas tank fixing rod 405 is fixedly installed with a hot gas diversion insulation gas tank 406, and the outside of the hot gas diversion insulation gas tank 406 is fixedly connected with two diversion connecting pipes 408, and the outside of the first dust collecting bellows 401 and the second dust collecting bellows 402 are both fixedly installed with an external partition net 407, and the inner end of the diversion connecting pipe 408 is fixedly connected to the gas tank connecting pipe 11.

[0041] like Figure 3 、 Figures 5 to 7 As shown, the first dust collecting bellows 401 includes: a dust collecting bellows shell 4011, a dust collecting fan duct 4012, a fan motor mounting bracket 4013, a fan motor 4014, a fan blade 4015, a fan rear air duct 4016, a dust collecting diversion hole 4017, a dust collecting diversion pipe 4018, and a dust collecting pipe opening 4019; the dust collecting fan duct 4012 is fixedly installed inside the dust collecting bellows shell 4011, and the fan motor mounting bracket 4013 is fixedly installed on the inner wall of the dust collecting fan duct 4012. A fan motor 4014 is fixedly installed at the front end of the fan motor mounting bracket 4013, and a fan blade 4015 is fixedly installed on the output shaft of the fan motor 4014; a fan rear air duct 4016 is integrated inside the dust collecting fan duct 4012, and a dust collecting diversion hole 4017 is opened on the inner wall of the fan rear air duct 4016, and a dust collecting diversion pipe 4018 is integrated at the rear end of the dust collecting diversion hole 4017, and a dust collecting pipe opening 4019 is integrated at the rear end of the dust collecting diversion pipe 4018.

[0042] like Figure 3 、 Figures 8 to 10As shown, the dust filter cabin group 403 includes: a dust filter cartridge 4031, a filter replacement window 4032, a filter cabin cover 4033, a dust collection variable diameter cover 4034, a hot air return pipe 4035, a diversion hole blocking platform 4036, a flow-gathering booster ring cavity 4037, an outer layer flow layer 4038, an outer layer flow hole 4039, a filter element fixing top platform 40310, and an inner groove 40312 of the top platform; the upper end of the dust filter cartridge 4031 is provided with a filter replacement window 4032. 32. The outer sides of both ends of the dust collecting filter cartridge 4031 are integrated with dust collecting variable diameter covers 4034, and the outer sides of the dust collecting variable diameter cover 4034 are integrated with a filter cabin cover 4033, and the filter cabin cover 4033 is fixed to the inner surface of the dust collecting bellows housing 4011; a diverter hole blocking platform 4036 is provided in the middle of the filter cabin cover 4033, and a filter element fixing top platform 40310 is integrated in the middle of the inner side of the diverter hole blocking platform 4036. A flow-gathering and pressurizing ring cavity 4037 is provided between the flow hole blocking platform 4036 and the filter element fixed top platform 40310; an outer flow layer 4038 is provided between the outer side of the diverter hole blocking platform 4036 and the dust collecting variable diameter cover 4034, and an outer layer flow hole 4039 is provided inside the outer flow layer 4038 and located on the diverter hole blocking platform 4036. The inner walls of the dust collecting filter cartridge 4031 are integrated with pressurizing rings 40311; the filter element fixed top platform 40310 A top platform inner groove 40312 is opened at the inner end, and a dust collecting filter 40313 is fixedly installed in the dust collecting filter cartridge 4031. Both ends of the dust collecting filter 40313 are provided with a filter cartridge mounting top shaft 40314, and the filter cartridge mounting top shaft 40314 is set in the top platform inner groove 40312. The filter cabin cover 4033 covers the outside of the dust collecting pipe opening 4019, and a hot air return pipe 4035 is fixedly connected to the inside of one of the filter cabin cover 4033.

[0043] In the above technical solution, the fan motor 4014 in the second dust collecting air box 402 drives the fan blades 4015 to rotate, and the hot air around the dry vacuum pump 8 is sucked into the dust collecting fan duct 4012 under negative pressure. Then, the rear end of the fan rear duct 4016 is sealed by the diversion hole blocking platform 4036, and the hot air can only enter the dust collecting diversion pipe 4018 through the dust collecting diversion hole 4017. After the hot air is diverted, dust collection and filtration can be better performed.

[0044] Among them, after the hot air comes out from the dust collecting pipe opening 4019, it enters the gathering and boosting circle cavity 4037 through the outer flow layer 4038 and the outer flow hole 4039, and is variable-diameter and pressurized through the gap between the inner filter element fixed top platform 40310 and the boosting flow circle 40311 in the gathering and boosting circle cavity 4037. When passing through the dust collecting filter element 40313, the dust can be better collected, and the filtered hot air enters the hot gas diversion insulation gas tank 406 through the hot air return pipe 4035 at the lower end, and then is connected to the gas tank connecting pipe 11 through the diversion connecting pipe 408 at the outer end of the hot gas diversion insulation gas tank 406.

[0045] Working principle:

[0046] The present invention provides a vacuum pump transition gas tank 7 at the lower end of the dry vacuum pump 8, and first filters the hot air generated around the dry vacuum pump 8 through the dust collection box module 4, and then collects a portion of the hot air into the gas tank connecting pipe 11 and enters the vacuum pump transition gas tank 7. The hot air can be kept warm by contact with the dry vacuum pump 8 and transported to other places to assist other equipment in preheating or heating. Compared with the existing vacuum pump dust collection box, the present invention can recycle the preheated heat, which has the effect of energy saving and environmental protection.

[0047] The fan motor 4014 in the second dust collecting air box 402 drives the fan blades 4015 to rotate, drawing the hot air around the dry vacuum pump 8 into the dust collecting fan duct 4012 under negative pressure. Subsequently, the rear end of the fan rear duct 4016 is sealed by the diversion hole blocking platform 4036, so that the hot air can only enter the dust collecting diversion pipe 4018 through the dust collecting diversion hole 4017. After the hot air is diverted, dust collection and filtration can be better performed.

[0048] Among them, after the hot air comes out from the dust collecting pipe opening 4019, it enters the gathering and boosting circle cavity 4037 through the outer flow layer 4038 and the outer flow hole 4039, and is variable-diameter and pressurized through the gap between the inner filter element fixed top platform 40310 and the boosting flow circle 40311 in the gathering and boosting circle cavity 4037. When passing through the dust collecting filter element 40313, the dust can be better collected, and the filtered hot air enters the hot gas diversion insulation gas tank 406 through the hot air return pipe 4035 at the lower end, and then is connected to the gas tank connecting pipe 11 through the diversion connecting pipe 408 at the outer end of the hot gas diversion insulation gas tank 406.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. Any obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A dust collecting box for a dry vacuum pump, comprising an equipment frame truss (1) and a dust collecting box module (4), characterized in that: An equipment frame support column (2) is fixedly mounted on the upper end of the equipment frame truss (1), a plurality of equipment frame cross beams (10) are fixedly mounted between the equipment frame trusses (1), a dust box mounting partition (3) is fixedly mounted on the upper end of the equipment frame cross beam (10), and the dust box module (4) is fixedly mounted on the dust box mounting partition (3).

2. A dust collecting box for a dry vacuum pump according to claim 1, characterized in that: A vacuum pump mounting base partition (5) is fixedly mounted on the upper end of the equipment frame truss (1), a vacuum pump mounting base (6) is fixedly mounted on the upper end surface of the vacuum pump mounting base partition (5), and two vacuum pump transition gas tanks (7) are fixedly mounted on the upper end of the vacuum pump mounting base (6).

3. A dust collecting box for a dry vacuum pump according to claim 2, characterized in that: A dry vacuum pump (8) is fixedly mounted on the upper end of the vacuum pump transition gas tank (7), and a gas tank connecting pipe (11) is fixedly connected to the inner end of the vacuum pump transition gas tank (7).

4. A dust collecting box for a dry vacuum pump according to claim 3, characterized in that: A vacuum pump installation side partition (9) is fixedly installed between the equipment frame support columns (2).

5. A dust collecting box for a dry vacuum pump according to claim 4, characterized in that: The dust collecting box module (4) comprises: a first dust collecting bellows (401), a second dust collecting bellows (402), a dust filter cabin assembly (403), a dust collecting bellows mounting lug (404), a diversion heat preservation gas tank fixing rod (405), a hot gas diversion heat preservation gas tank (406), and a diversion connecting pipe (408); Dust collecting bellows mounting ears (404) are fixedly mounted on the sides of the first dust collecting bellows (401) and the second dust collecting bellows (402), and the dust collecting bellows mounting ears (404) are fixedly mounted on the equipment frame support column (2) and the dust collecting box mounting partition (3), respectively. A dust filter cabin group (403) is provided between the first dust collecting bellows (401) and the second dust collecting bellows (402); The internal structures of the first dust collecting wind box (401) and the second dust collecting wind box (402) are symmetrical about the center of the dust filter chamber group (403); a diversion heat preservation gas tank fixing rod (405) is fixedly installed at the lower end of the second dust collecting wind box (402); a hot gas diversion heat preservation gas tank (406) is fixedly installed at the lower end of the diversion heat preservation gas tank fixing rod (405); and two diversion connecting pipes (408) are fixedly connected to the outer side of the hot gas diversion heat preservation gas tank (406).

6. A dust collecting box for a dry vacuum pump according to claim 5, characterized in that: External partition nets (407) are fixedly mounted on the outsides of the first dust collecting wind box (401) and the second dust collecting wind box (402).

7. A dust collecting box for a dry vacuum pump according to claim 6, characterized in that: The inner end of the diversion connecting pipe (408) is fixedly connected to the gas tank connecting pipe (11).

8. The dust collecting box for a dry vacuum pump according to claim 7, characterized in that: The first dust collecting bellows (401) comprises: a dust collecting bellows housing (4011), a dust collecting fan air duct (4012), a fan motor mounting frame (4013), a fan motor (4014), fan blades (4015), a fan rear air duct (4016), a dust collecting diversion hole (4017), a dust collecting diversion pipe (4018), and a dust collecting pipe opening (4019); A dust collecting fan duct (4012) is fixedly mounted inside the dust collecting bellows housing (4011), a fan motor mounting bracket (4013) is fixedly mounted on the inner wall of the dust collecting fan duct (4012), a fan motor (4014) is fixedly mounted on the front end of the fan motor mounting bracket (4013), and a fan blade (4015) is fixedly mounted on the output shaft of the fan motor (4014); A fan rear air duct (4016) is integrated inside the dust collecting fan air duct (4012), a dust collecting diversion hole (4017) is provided on the inner wall of the fan rear air duct (4016), a dust collecting diversion pipe (4018) is integrated at the rear end of the dust collecting diversion hole (4017), and a dust collecting pipe opening (4019) is integrated at the rear end of the dust collecting diversion pipe (4018).

9. The dust collecting box for a dry vacuum pump according to claim 8, characterized in that: The dust filter cabin assembly (403) comprises: a dust filter cartridge (4031), a filter cartridge replacement window (4032), a filter cabin cover (4033), a dust collecting variable diameter cover (4034), a diversion hole blocking platform (4036), a flow-gathering and pressurizing ring cavity (4037), an outer layer flow layer (4038), an outer layer flow-through hole (4039), a filter cartridge fixing top platform (40310), and a top platform inner groove (40312); A filter replacement window (4032) is provided at the upper end of the dust collecting filter cartridge (4031), dust collecting variable diameter covers (4034) are integrally provided on the outer sides of both ends of the dust collecting filter cartridge (4031), a filter cabin cover cylinder (4033) is integrally provided on the outer side of the dust collecting variable diameter cover (4034), and the filter cabin cover cylinder (4033) is fixed to the inner surface of the dust collecting bellows housing (4011); A diverter hole blocking platform (4036) is provided in the middle of the filter cabin cover (4033), a filter element fixing top platform (40310) is integrated in the middle of the inner side of the diverter hole blocking platform (4036), and a flow-gathering and pressurizing ring cavity (4037) is provided between the diverter hole blocking platform (4036) and the filter element fixing top platform (40310); An outer flow layer (4038) is provided between the outer side of the diverter hole blocking platform (4036) and the dust collecting variable diameter cover (4034); an outer flow hole (4039) is provided inside the outer flow layer (4038) and located on the diverter hole blocking platform (4036); and booster flow rings (40311) are integrally provided at both ends of the inner wall of the dust collecting filter cartridge (4031); The inner end of the filter element fixing top platform (40310) is provided with a top platform inner groove (40312), a dust collecting filter element (40313) is fixedly installed in the dust collecting filter element barrel (4031), and filter element mounting top shafts (40314) are provided at both ends of the dust collecting filter element (40313), and the filter element mounting top shafts (40314) are arranged in the top platform inner groove (40312).

10. The dust collecting box for a dry vacuum pump according to claim 9, characterized in that: The filter cabin cover tube (4033) covers the outside of the dust collecting pipe opening (4019), and a hot air return pipe (4035) is fixedly connected to the inside of one of the filter cabin cover tubes (4033).

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