Sewage treatment device for municipal water supply and drainage

Abstract

The utility model relates to a sewage treatment device for municipal water supply and drainage. The sewage treatment device comprises a fixed plate, a sewage treatment box, a sewage pretreatment mechanism, a pretreated garbage discharge mechanism, a stirring and mixing mechanism, a first water pump and a sewage conveying pipe, the sewage treatment tank is fixedly arranged on the right side of the upper end surface of the fixed plate; the sewage conveying pipe is fixedly arranged on the left side of the top of the sewage treatment tank; the sewage pretreatment mechanism is arranged at the upper end in the sewage treatment tank; the stirring and mixing mechanism is arranged at the lower end in the sewage treatment tank; the pretreated garbage discharge mechanism is arranged at the position, corresponding to the sewage pretreatment mechanism, of the right side of the sewage treatment tank and is used for discharging pretreated garbage discharged by the sewage pretreatment mechanism; the first water pump is fixedly arranged on the left side of the sewage treatment tank and is used for discharging sewage treated by the sewage treatment tank to a subsequent working unit. According to the utility model, the pollution and winding of impurities to the stirring roller are reduced, so that the working intensity of workers is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a sewage treatment device for municipal water supply and drainage. Background Art

[0002] In recent years, with the increasing prominence of water environment problems and the increasing exposure of overload operation problems of centralized sewage treatment plants, the demand for decentralized sewage treatment equipment has become increasingly strong.

[0003] For example, the Chinese patent application with application number CN 220665083 U and titled "A Domestic Sewage Treatment Equipment for Municipal Water Supply and Drainage" relates to the field of sewage treatment technology, including a body, wherein a horizontal plate is fixedly installed at the lower end of the interior of the body, a partition plate 1 is fixedly installed at the left end of the top of the horizontal plate, a partition plate 2 is fixedly installed at the middle end of the top of the horizontal plate, a partition plate 3 is fixedly installed at the right end of the top of the horizontal plate, and a water inlet pipe is fixedly installed at the left end of the top of the body. The utility model drives the screw rod to rotate by starting motor 2. Since the threaded sleeve is fixedly connected to the slider, the slider slides up and down on the slide rail, thereby driving the moving rod to move up and down, so that the cleaning ring moves up and down on the outer surface of the UV tube to clean the impurities on its surface. There is no need to manually remove the UV tube from the equipment for cleaning, which makes cleaning more convenient, reduces damage to the UV tube, and increases the convenience and practicality of the device.

[0004] The defects of the prior art are:

[0005] Since municipal sewage contains more impurities, when the sewage enters the treatment tank, if there are more large solid objects among the impurities, the garbage will easily adhere to or entangle with the stirring rod during the processing and stirring, resulting in the need to manually clean the stirring rod, which is labor-intensive. Summary of the Invention

[0006] In view of the above problems, the utility model provides a sewage treatment device for municipal water supply and drainage, which aims to reduce the pollution and entanglement of impurities on the stirring roller and reduce the work intensity of workers.

[0007] In order to solve the above problems, the technical solution provided by the present invention is:

[0008] A sewage treatment device for municipal water supply and drainage, characterized by comprising: a fixed plate, a sewage treatment tank, a sewage pretreatment mechanism, a pre-treated waste discharge mechanism, a stirring and mixing mechanism, a first water pump and a sewage delivery pipe, wherein:

[0009] The sewage treatment tank is fixedly arranged on the right side of the upper end surface of the fixing plate;

[0010] The sewage delivery pipe is fixedly arranged on the left side of the top of the sewage treatment tank;

[0011] The sewage pretreatment mechanism is arranged at the upper end of the interior of the sewage treatment tank;

[0012] The stirring and mixing mechanism is arranged at the lower end of the interior of the sewage treatment tank;

[0013] The pre-treated garbage discharge mechanism is arranged at a position corresponding to the sewage pre-treatment mechanism on the right side of the sewage treatment tank and is used to discharge the pre-treated garbage discharged by the sewage pre-treatment mechanism;

[0014] The first water pump is fixedly arranged on the left side of the sewage treatment tank and is used to discharge the sewage treated by the sewage treatment tank to the subsequent working unit.

[0015] Preferably, the sewage pretreatment mechanism comprises a first motor, a first transmission gear train, and a filter belt group; wherein:

[0016] The output end of the first motor is fixedly connected to the input end of the first transmission gear train;

[0017] The first transmission wheel system is in transmission connection with the filter belt group; and the filter belt group is provided with a plurality of filter holes.

[0018] Preferably, the first transmission gear train comprises a first driving wheel, a first driven wheel, a first pulley, a second pulley, a second driving wheel and a second driven wheel, wherein:

[0019] The first driving wheel is fixedly connected to the output end of the first motor; the front end of the first driving wheel passes through the side wall of the sewage treatment tank and is then fixedly connected to the first pulley;

[0020] The first pulley is in driving connection with the second pulley;

[0021] The rear end of the second pulley is fixedly connected to the second driving wheel;

[0022] The rear end of the second driving wheel is rotatably connected to the inner wall of the back side of the sewage treatment tank;

[0023] The first driven wheel is rotatably connected to the front and rear ends of the inner wall of the left side of the sewage treatment tank;

[0024] The second driven wheel is rotatably connected to the front and rear ends of the inner wall of the right side of the sewage treatment tank;

[0025] The filter belt set comprises a first filter belt and a second filter belt; wherein:

[0026] The first filter belt is in driving connection with the first driven wheel and the first driving wheel;

[0027] The second filter belt is in driving connection with the second driven wheel and the second driving wheel;

[0028] The outer rings of the first driven wheel, the first driving wheel, the second driving wheel and the second driven wheel are fixedly connected with protrusions adapted to the filter holes on the filter belt group.

[0029] Preferably, a first automatic doser is provided in the middle of the top outer side of the sewage treatment tank; the first delivery pipe of the first automatic doser is fixedly connected to the lower side of the front of the sewage treatment tank; and a liquid level meter is fixedly connected to the left side of the inner wall of the sewage treatment tank.

[0030] Preferably, the pre-treated garbage discharge mechanism includes a discharge box, a box door and an oblique connecting plate, wherein: the right side of the discharge box is hinged to the box door; the left side of the discharge box is fixedly connected to the oblique connecting plate; and a sewage outlet is provided at the connection between the upper right end of the sewage treatment box and the treated garbage discharge mechanism.

[0031] Preferably, the stirring and mixing mechanism includes a second motor, a first pulley group, a second pulley group, a third pulley group and a stirring rod, wherein: the first pulley group is arranged at the front end of the second motor; the first pulley group is transmission-connected to the second pulley group; the second pulley group is transmission-connected to the third pulley group; and the rear ends of the first pulley group, the second pulley group and the third pulley group are respectively provided with multiple groups of stirring rods.

[0032] Preferably, a still box is provided on the left side of the first water pump; the delivery pipe of the first water pump is located at the lower end of the left side of the sewage treatment tank; and the output pipe of the first water pump is located at the upper end of the still box.

[0033] Preferably, a suction mechanism is provided on the left side of the upper end of the static box; the suction mechanism comprises a second water pump, an input pipe, a delivery pipe, a connecting hose, a fixing member, a floating plate and a floating ball, wherein:

[0034] The right side of the second water pump is fixedly connected to the input pipe; the end of the input pipe away from the second water pump is fixedly connected to the connecting hose; the lower end of the connecting hose is fixedly connected to the fixing member; the outer end of the fixing member is fixedly connected to the float plate; the float is fixedly connected to both sides of the lower end of the float plate; the left side of the second water pump is fixedly connected to the delivery pipe; the end of the delivery pipe away from the second water pump is fixedly connected to the disinfection box.

[0035] Preferably, multiple groups of filter screens are provided inside the disinfection box; an inspection box door is provided at the upper end of the left side wall of the disinfection box; multiple groups of support bars are fixedly connected to the inside of the disinfection box; the filter screens are provided at the upper ends of the support bars; a second automatic doser is provided on the outer side of the top of the disinfection box, and the second delivery pipe of the second automatic doser is fixedly connected to the lower side of the front of the disinfection box.

[0036] Preferably, the lower end of the left side of the disinfection box is fixedly connected to a drain pipe; a solenoid valve is provided inside the drain pipe; and the lower end of the static box is fixedly connected to a sewage pipe.

[0037] Compared with the prior art, the present invention has the following advantages:

[0038] Since the device of the utility model reduces the pollution and entanglement of the stirring roller by impurities, the work intensity of the workers is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the overall appearance of the device in a specific embodiment of the present utility model;

[0040] Figure 2 It is a schematic top view of a device in a specific embodiment of the utility model;

[0041] Figure 3 It is a schematic diagram of a front view of a device in a specific embodiment of the present utility model;

[0042] Figure 4 In the device of the specific embodiment of the utility model Figure 3 Schematic diagram of a partial enlarged view of point A;

[0043] Figure 5 This is a schematic diagram of the transmission structure of the sewage pretreatment mechanism in the equipment of a specific embodiment of the utility model;

[0044] Figure 6 This is a schematic diagram of the transmission structure of the stirring and mixing mechanism in the equipment of a specific embodiment of the utility model.

[0045] Wherein: 1. Fixed plate, 2. Sewage treatment tank, 3. Sewage pretreatment mechanism, 301. First motor, 310. First transmission gear train, 320. Filter belt assembly, 302. First driving pulley, 303. First driven pulley, 304. First filter belt, 305. First pulley, 306. Second pulley, 307. Second driving pulley, 308. Second driven pulley, 309. Second filter belt, 4. Pre-treated waste discharge mechanism, 401. Discharge tank, 402. Tank door, 403. Oblique connecting plate, 5. Mixing mechanism, 501. Second motor, 502. First pulley assembly, 503. Second pulley assembly, 504. Third pulley assembly, 505. Stirring rod, 6. First water pump, 7. Still tank, 701. Drain pipe, 8. Disinfection tank, 801. Filter screen, 802. Drain pipe, 9. Suction mechanism, 901. Second water pump, 902. Inlet pipe, 903. Delivery pipe, 904. Connecting hose, 905. Fixing, 906. Float, 907. Float, 10. Sewage delivery pipe, 11. First automatic doser, 1101. First delivery pipe, 12. Second automatic doser, 1201. Second delivery pipe DETAILED DESCRIPTION

[0046] The present invention is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0047] like Figure 1 、 2 , 3, 4, 5, 6, a municipal water supply and drainage sewage treatment device is characterized by comprising: a fixed plate 1, a sewage treatment tank 2, a sewage pretreatment mechanism 3, a pre-treated garbage discharge mechanism 4, a stirring and mixing mechanism 5, a first water pump 6 and a sewage delivery pipe 10, wherein:

[0048] The sewage treatment tank 2 is fixedly arranged on the right side of the upper end surface of the fixing plate 1 .

[0049] The sewage conveying pipe 10 is fixedly arranged on the left side of the top of the sewage treatment tank 2 .

[0050] The sewage pre-treatment mechanism 3 is arranged at the upper end of the sewage treatment tank 2 .

[0051] The stirring and mixing mechanism 5 is provided at the lower end of the sewage treatment tank 2 .

[0052] The pre-treated garbage discharge mechanism 4 is arranged at a position corresponding to the sewage pre-treatment mechanism 3 on the right side of the sewage treatment tank 2 and is used to discharge the pre-treated garbage discharged by the sewage pre-treatment mechanism 3 .

[0053] The first water pump 6 is fixedly arranged on the left side of the sewage treatment tank 2 and is used to discharge the sewage treated by the sewage treatment tank 2 to the subsequent working unit.

[0054] It should be noted that the sewage pretreatment mechanism 3 includes a first motor 301, a first transmission gear train 310, and a filter belt assembly 320; wherein:

[0055] The output end of the first motor 301 is fixedly connected to the input end of the first transmission gear train 310 .

[0056] The first transmission gear train 310 is in transmission connection with the filter belt assembly 320 ; the filter belt assembly 320 is provided with a plurality of filter holes.

[0057] It should be further explained that the first transmission gear train 310 includes a first driving wheel 302, a first driven wheel 303, a first pulley 305, a second pulley 306, a second driving wheel 307 and a second driven wheel 308, wherein:

[0058] The first driving wheel 302 is fixedly connected to the output end of the first motor 301 ; the front end of the first driving wheel 302 passes through the side wall of the sewage treatment tank 2 and is then fixedly connected to the first pulley 305 .

[0059] The first pulley 305 is in transmission connection with the second pulley 306 .

[0060] The rear end of the second pulley 306 is fixedly connected to the second driving pulley 307 .

[0061] The rear end of the second driving wheel 307 is rotatably connected to the inner wall of the back side of the sewage treatment tank 2 .

[0062] The front and rear ends of the inner wall on the left side of the sewage treatment tank 2 are rotatably connected to the first driven wheel 303 .

[0063] The second driven wheels 308 are rotatably connected to the front and rear ends of the inner wall on the right side of the sewage treatment tank 2 .

[0064] The filter belt set 320 includes a first filter belt 304 and a second filter belt 309; wherein:

[0065] The first filter belt 304 is in transmission connection with the first driven wheel 303 and the first driving wheel 302 .

[0066] The second filter belt 309 is in driving connection with the second driven wheel 308 and the second driving wheel 307 .

[0067] The outer rings of the first driven wheel 303 , the first driving wheel 302 , the second driving wheel 307 and the second driven wheel 308 are fixedly connected with protrusions adapted to the filter holes on the filter belt assembly 320 .

[0068] It should be noted that a first automatic doser 11 is provided in the middle of the top outer side of the sewage treatment tank 2; the first delivery pipe 1101 of the first automatic doser 11 is fixedly connected to the lower side of the front of the sewage treatment tank 2; and a liquid level meter is fixedly connected to the left side of the inner wall of the sewage treatment tank 2.

[0069] It should be further explained that the liquid level meter is lower than the sewage outlet, and at the same time, the liquid level meter is signal-connected to the sewage delivery pipe 10 to prevent the untreated sewage inside the sewage treatment tank 2 from being discharged from the sewage outlet.

[0070] It should be noted that the pre-treated garbage discharge mechanism 4 includes a discharge box 401, a box door 402 and an oblique connecting plate 403, wherein: the right side of the discharge box 401 is hinged to the box door 402; the left side of the discharge box 401 is fixedly connected to the oblique connecting plate 403; a sewage outlet is provided at the connection between the upper right end of the sewage treatment box 2 and the treated garbage discharge mechanism 4.

[0071] It should be further explained that, by adopting the above-mentioned technical solution, the impurities filtered by the sewage pretreatment mechanism 3 can be transported to the upper end of the inclined connecting plate 403 through the sewage pretreatment mechanism 3; and fall to the bottom end of the discharge box 401 through the inclination of the inclined connecting plate 403; when there are more impurities at the bottom end of the discharge box 401, the box door 402 can be pushed open to allow the impurities to be discharged through the opening.

[0072] like Figure 3 、 6 As shown, it should be noted that the stirring and mixing mechanism 5 includes a second motor 501, a first pulley group 502, a second pulley group 503, a third pulley group 504 and a stirring rod 505, wherein: the first pulley group 502 is arranged at the front end of the second motor 501; the first pulley group 502 is connected to the second pulley group 503 for transmission; the second pulley group 503 is connected to the third pulley group 504 for transmission; and the rear ends of the first pulley group 502, the second pulley group 503 and the third pulley group 504 are respectively provided with multiple groups of stirring rods 505.

[0073] It should be further explained that the first pulley group 502, the second pulley group 503 and the third pulley group 504 are composed of two groups of pulleys and a transmission belt; the first pulley group 502 is driven to rotate by the second motor 501, the second pulley group 503 is driven to rotate by the first pulley group 502, and then the third pulley group 504 is driven to rotate by the second pulley group 503, thereby driving the stirring rod 505 to rotate.

[0074] It should be noted that a static box 7 is provided on the left side of the first water pump 6 ; the delivery pipe of the first water pump 6 is located at the lower end of the left side of the sewage treatment tank 2 ; and the output pipe of the first water pump 6 is located at the upper end of the static box 7 .

[0075] It should be further explained that the mixed water in the sewage treatment tank 2 can be pumped into the static tank 7 by the first water pump 6 .

[0076] It should be noted that a suction mechanism 9 is provided on the left side of the upper end of the static box 7; the suction mechanism 9 includes a second water pump 901, an input pipe 902, a delivery pipe 903, a connecting hose 904, a fixing member 905, a floating plate 906 and a floating ball 907, wherein:

[0077] The right side of the second water pump 901 is fixedly connected to the input pipe 902; the end of the input pipe 902 away from the second water pump 901 is fixedly connected to the connecting hose 904; the lower end of the connecting hose 904 is fixedly connected to the fixing member 905; the outer end of the fixing member 905 is fixedly connected to the float plate 906; the two sides of the lower end of the float plate 906 are fixedly connected with float balls 907; the left side of the second water pump 901 is fixedly connected to the delivery pipe 903; the end of the delivery pipe 903 away from the second water pump 901 is fixedly connected to the disinfection box 8.

[0078] It should be further explained that after the mixed sewage inside the static box 7 is settled, the float 907 can drive the float plate 906 and the fixing part 905 to float, and the treated water above the sediment can be transported to the inside of the disinfection box 8 through the second water pump 901.

[0079] It should be noted that multiple groups of filter screens 801 are provided inside the disinfection box 8; an inspection box door is provided at the upper end of the left side wall of the disinfection box 8; multiple groups of support bars are fixedly connected inside the disinfection box 8; the filter screens 801 are provided at the upper ends of the support bars; a second automatic doser 12 is provided on the outer side of the top of the disinfection box 8, and the second delivery pipe 1201 of the second automatic doser 12 is fixedly connected to the lower side of the front of the disinfection box 8.

[0080] It should be further explained that by opening the inspection box door, the filter screen plate 801 placed at the upper end of the support bar can be taken out for replacement and cleaning.

[0081] It should be further explained that the second automatic doser 12 is an existing device that can deliver the prepared liquid medicine.

[0082] It should be noted that the lower end of the left side of the disinfection box 8 is fixedly connected to a drain pipe 802; a solenoid valve is provided inside the drain pipe 802; and the lower end of the static box 7 is fixedly connected to a sewage pipe 701.

[0083] It should be noted that the sewage is transported to the upper end of the fixed plate 1 through the sewage conveying pipe 10; it falls from the upper end of the fixed plate 1, and the first motor 301 is started when it falls, and then the first driving wheel 302 is driven to rotate by the first motor 301, driving the first filter belt 304 to be transmitted from bottom to top at the outer end of the first driving wheel 302 and the first driven wheel 303; when the upper end sewage falls, it is filtered through the filter holes of the first filter belt 304; the filtered impurities are transmitted to the inside of the discharge box 401 through the first filter belt 304, the second filter belt 309 and the oblique connecting plate 403; the sewage falling into the sewage treatment tank 2 is added with flocculation agent through the first automatic doser 11; when adding the agent, the second motor 501 drives multiple groups of stirring The mixing rod 505 rotates and stirs, thereby accelerating the mixing of the agent and sewage; after the mixing is completed, the mixed sewage is transported to the interior of the static box 7 for sedimentation through the first water pump 6; when the mixed sewage in the static box 7 is settled, the float 906 and the fixing part 905 can be driven to float by the float ball 907, and the treated water on the upper end of the sediment is transported to the interior of the disinfection box 8 by the second water pump 901; during transportation, the filter plate 801 filters the transported water again, and at the same time, the disinfectant can be added through the second automatic doser 12 at the upper end of the disinfection box 8, and the disinfected water can be transported out through the drain pipe; the cooperation of the above structure reduces the contamination and entanglement of the stirring roller by impurities, thereby reducing the work intensity of the workers.

[0084] In the foregoing detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that embodiments of the claimed subject matter require more features than are clearly recited in each claim. On the contrary, as reflected in the appended claims, the invention comprises less than all the features of any individual disclosed embodiment. The appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0085] The above description of the disclosed embodiments is intended to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments presented herein but is intended to be consistent with the broadest scope of the principles and novel features disclosed herein.

[0086] The foregoing description includes examples of one or more embodiments. Of course, it is not possible to describe all possible combinations of components or methods for the purposes of describing the above embodiments, but one of ordinary skill in the art will recognize that the various embodiments may be further combined and arranged. Therefore, the embodiments described herein are intended to encompass all such changes, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent the term "comprising" is used in the specification or claims, the term is intended to be encompassed in a manner similar to the term "including," as explained in terms of "including," used as a transitional word in the claims. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or."

[0087] The specific implementation methods described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific implementation method of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A sewage treatment device for municipal water supply and drainage, characterized by: It comprises a fixed plate (1), a sewage treatment tank (2), a sewage pretreatment mechanism (3), a pre-treated garbage discharge mechanism (4), a stirring and mixing mechanism (5), a first water pump (6) and a sewage delivery pipe (10), wherein: The sewage treatment tank (2) is fixedly arranged on the right side of the upper end surface of the fixing plate (1); The sewage delivery pipe (10) is fixedly arranged on the left side of the top of the sewage treatment tank (2); The sewage pretreatment mechanism (3) is arranged at the upper end of the interior of the sewage treatment tank (2); The stirring and mixing mechanism (5) is arranged at the lower end inside the sewage treatment tank (2); The pre-treated garbage discharge mechanism (4) is arranged at a position corresponding to the sewage pre-treatment mechanism (3) on the right side of the sewage treatment tank (2) and is used to discharge the pre-treated garbage discharged by the sewage pre-treatment mechanism (3); The first water pump (6) is fixedly arranged on the left side of the sewage treatment tank (2) and is used to discharge the sewage treated by the sewage treatment tank (2) to a subsequent working unit.

2. The sewage treatment device for municipal water supply and drainage according to claim 1, characterized in that: The sewage pretreatment mechanism (3) comprises a first motor (301), a first transmission gear train (310), and a filter belt assembly (320); wherein: The output end of the first motor (301) is fixedly connected to the input end of the first transmission gear train (310); The first transmission wheel train (310) is in transmission connection with the filter belt assembly (320); and the filter belt assembly (320) is provided with a plurality of groups of filter holes.

3. The sewage treatment device for municipal water supply and drainage according to claim 2, characterized in that: The first transmission gear train (310) comprises a first driving wheel (302), a first driven wheel (303), a first pulley (305), a second pulley (306), a second driving wheel (307) and a second driven wheel (308), wherein: The first driving wheel (302) is fixedly connected to the output end of the first motor (301); the front end of the first driving wheel (302) passes through the side wall of the sewage treatment tank (2) and is then fixedly connected to the first pulley (305); The first pulley (305) is in transmission connection with the second pulley (306); The rear end of the second pulley (306) is fixedly connected to the second driving wheel (307); The rear end of the second driving wheel (307) is rotatably connected to the inner wall of the back side of the sewage treatment tank (2); The first driven wheel (303) is rotatably connected to the front and rear ends of the inner wall on the left side of the sewage treatment tank (2); The second driven wheel (308) is rotatably connected to the front and rear ends of the inner wall on the right side of the sewage treatment tank (2); The filter belt set (320) comprises a first filter belt (304) and a second filter belt (309); wherein: The first filter belt (304) is in transmission connection with the first driven wheel (303) and the first driving wheel (302); The second filter belt (309) is in transmission connection with the second driven wheel (308) and the second driving wheel (307); The outer rings of the first driven wheel (303), the first driving wheel (302), the second driving wheel (307) and the second driven wheel (308) are fixedly connected with protrusions that are adapted to the filter holes on the filter belt group (320).

4. The sewage treatment device for municipal water supply and drainage according to claim 3, characterized in that: A first automatic doser (11) is provided in the middle of the outer top portion of the sewage treatment tank (2); a first delivery pipe (1101) of the first automatic doser (11) is fixedly connected to the lower side of the front face of the sewage treatment tank (2); and a liquid level gauge is fixedly connected to the left side of the inner wall of the sewage treatment tank (2).

5. The sewage treatment device for municipal water supply and drainage according to claim 4, characterized in that: The pre-treated garbage discharge mechanism (4) comprises a discharge box (401), a box door (402) and an oblique connecting plate (403), wherein: the right side of the discharge box (401) is hinged to the box door (402); the left side of the discharge box (401) is fixedly connected to the oblique connecting plate (403); and a sewage outlet is provided at the connection between the upper right end of the sewage treatment box (2) and the treated garbage discharge mechanism (4).

6. The sewage treatment device for municipal water supply and drainage according to claim 5, characterized in that: The stirring and mixing mechanism (5) comprises a second motor (501), a first pulley group (502), a second pulley group (503), a third pulley group (504) and a stirring rod (505), wherein: the first pulley group (502) is arranged at the front end of the second motor (501); the first pulley group (502) is connected to the second pulley group (503) in a transmission connection; the second pulley group (503) is connected to the third pulley group (504) in a transmission connection; and a plurality of groups of stirring rods (505) are respectively arranged at the rear ends of the first pulley group (502), the second pulley group (503) and the third pulley group (504).

7. The sewage treatment device for municipal water supply and drainage according to claim 6, characterized in that: A static box (7) is provided on the left side of the first water pump (6); the delivery pipe of the first water pump (6) is located at the lower end of the left side of the sewage treatment tank (2); and the output pipe of the first water pump (6) is located at the upper end of the static box (7).

8. The sewage treatment device for municipal water supply and drainage according to claim 7, characterized in that: A suction mechanism (9) is provided on the left side of the upper end of the static box (7); the suction mechanism (9) comprises a second water pump (901), an input pipe (902), a delivery pipe (903), a connecting hose (904), a fixing member (905), a floating plate (906) and a floating ball (907), wherein: The right side of the second water pump (901) is fixedly connected to the input pipe (902); the end of the input pipe (902) away from the second water pump (901) is fixedly connected to the connecting hose (904); the lower end of the connecting hose (904) is fixedly connected to the fixing member (905); the outer end of the fixing member (905) is fixedly connected to the floating plate (906); the two sides of the lower end of the floating plate (906) are fixedly connected to the float (907); the left side of the second water pump (901) is fixedly connected to the delivery pipe (903); the end of the delivery pipe (903) away from the second water pump (901) is fixedly connected to the disinfection box (8).

9. The sewage treatment device for municipal water supply and drainage according to claim 8, characterized in that: The interior of the disinfection box (8) is provided with multiple groups of filter screens (801); the upper end of the left side wall of the disinfection box (8) is provided with an inspection box door; the interior of the disinfection box (8) is fixedly connected with multiple groups of support bars; the filter screens (801) are arranged at the upper ends of the support bars; a second automatic doser (12) is provided on the outer side of the top of the disinfection box (8), and the second delivery pipe (1201) of the second automatic doser (12) is fixedly connected to the lower side of the front of the disinfection box (8).

10. The sewage treatment device for municipal water supply and drainage according to claim 9, characterized in that: The lower end of the left side of the disinfection box (8) is fixedly connected to a drainage pipe (802); a solenoid valve is provided inside the drainage pipe (802); and the lower end of the static box (7) is fixedly connected to a sewage pipe (701).

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