Sewage purification pretreatment device

Abstract

The utility model provides a sewage purification pretreatment device, and relates to the technical field of sewage purification, the sewage purification pretreatment device comprises a pretreatment main body, the top end surface of the pretreatment main body of a rectangular block structure is provided with a pretreatment groove of a rectangular groove structure; a first intercepting net plate is fixedly mounted on the left side of the interior of the pretreatment tank, a second intercepting net plate is fixedly mounted on the right side of the interior of the pretreatment tank, and a proximity switch b is matched with a metal induction block for induction through timing arrangement of a timing module; according to the automatic cleaning device, the fault of the driving motor used for driving meshing transmission of the gear and the rack can be automatically judged, so that when the driving motor breaks down, buzzing warning at the first time can be achieved, a worker is reminded, the problem that a device structure for automatically cleaning blocked meshes through a driving piece is solved, and the working efficiency is improved. And if a driving piece depended by the device has a fault, the device cannot realize timely fault identification and warning reminding.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage purification, and in particular to a sewage purification pretreatment device. Background Art

[0002] Sewage purification refers to the process of purifying sewage so that it meets the water quality requirements for discharge into a certain water body or reuse. Sewage purification is divided into multiple purification steps, and the first stage refers to sewage pretreatment, which includes removing large suspended particles, fibers, plastics and other solid debris, as well as floating objects in the raw water. This stage is generally achieved by filtering and intercepting. After a long period of use, the mesh of the filter used to achieve filtering and interception will inevitably be clogged by the attachment of impurities, thereby affecting the filtering and interception and the efficiency of sewage passing. Most of the existing cleaning methods are wiped and cleaned manually, which is inconvenient. Some device structures that use automatic cleaning methods rely on driving parts to achieve automatic cleaning, such as motors, electric cylinders, etc. If the driving parts they rely on fail, they cannot achieve timely fault identification and warning reminders, resulting in the inability of the automatic cleaning method to operate normally, which has defects.

[0003] Useful content

[0004] The utility model relates to a sewage purification pretreatment device. Through the timing setting of the timing module and the induction of the proximity switch B and the metal sensing block, it is possible to automatically determine whether a driving motor for driving the meshing transmission of the gear and the rack is faulty, so that when the driving motor fails, a buzzer warning can be realized in the first time to remind the staff so that they can go to the maintenance in time to ensure that the automatic wiping and cleaning operation at each interval is not affected.

[0005] In a first aspect of the present disclosure, a sewage purification pretreatment device is provided, which specifically comprises: a pretreatment body, wherein the top surface of the pretreatment body having a rectangular block structure is provided with a pretreatment tank having a rectangular groove structure; an input pipe is fixedly installed on the upper side of the left end surface of the pretreatment body, and an input hole connected to the pretreatment tank is opened at the axial center of the input pipe; an output pipe is fixedly installed on the lower side of the right end surface of the pretreatment body, and an output hole connected to the pretreatment tank is opened at the axial center of the output pipe; a first interception mesh plate is fixedly installed on the left side of the inside of the pretreatment tank, and a second interception mesh plate is fixedly installed on the right side of the inside of the pretreatment tank; a limiting column is fixedly installed on the four edge angles of the bottom end surface of the inner end of the pretreatment tank relative to the area between the first interception mesh plate and the second interception mesh plate; a front wiping strip block having a rectangular strip block structure is provided on the upper right side of the first interception mesh plate, and a limiting plug hole penetrating the bottom end surface of the front wiping strip block is opened at the front side and rear side edge of the top end of the front wiping strip block, and the two limiting plug holes are respectively connected to the left and right limiting plug holes. The two limiting columns on the side are plugged in and matched; the left end face of the front wiping strip does not contact the right end face of the first intercepting mesh plate, and a wiping brush is fixedly installed on the left end face of the front wiping strip, and the length of the wiping brush is greater than the distance between the left end face of the front wiping strip and the left end face of the first intercepting mesh plate; a rear wiping strip with a rectangular strip structure is provided on the right side of the front wiping strip, and a limiting plug hole that passes through the bottom end face of the rear wiping strip is also opened on the front side and rear edge of the top end of the rear wiping strip The two limit sockets are respectively engaged with the two limit columns located on the right side; the rear wiping strip is located on the left side of the second intercepting mesh plate, and the right end face of the rear wiping strip does not contact the left end face of the second intercepting mesh plate; a wiping brush is also fixedly installed on the right end face of the rear wiping strip, and the length of the wiping brush is greater than the distance between the right end face of the rear wiping strip and the right end face of the second intercepting mesh plate; the right end face of the front wiping strip is fixedly connected to the left end face of the rear wiping strip by two connecting rods.

[0006] Furthermore, a rack is fixedly installed on the rear side of the top end surface of the front wiping strip block, and the tooth end of the rack is facing backward; a support block is fixedly installed on the rear end surface of the pretreatment body, and a group of driving motors are fixedly installed on the right end surface of the support block; a gear is provided on the left side of the support block, and the shaft end of the driving motor passes through the support block and is fixedly installed with the gear; the gear is meshed with the rack.

[0007] Furthermore, a matching protrusion in a rectangular strip structure is provided on the left side of the front end face of the pretreatment body, and the matching protrusion corresponds to the position of the limit column located on the left side; an induction groove is opened on the upper side and the lower side of the front side of the inner end of the pretreatment tank, and a transparent window is sealed and installed at the opening ends of the two induction grooves; the positions of the two induction grooves correspond to the positions of the limit column located on the left side; a group of proximity switches a are installed in the induction groove located on the upper side, and a group of proximity switches b are installed in the induction groove located on the lower side.

[0008] Furthermore, a metal sensing block is embedded in the front end surface of the front wiping strip; when the top end surface of the front wiping strip and the top end surface of the pretreatment body are in the same horizontal plane, the metal sensing block is within the sensing range of the proximity switch a; when the bottom end surface of the front wiping strip contacts the bottom surface of the inner end of the pretreatment tank, the metal sensing block is within the sensing range of the proximity switch b.

[0009] Furthermore, a control box is fixedly installed on the rear end face of the preprocessing body, a microcontroller is arranged inside the control box, and the drive motor, proximity switch a and proximity switch b are electrically connected to the microcontroller; a battery is also arranged inside the control box, the battery is electrically connected to the microcontroller, and the battery is an external power supply; a power switch is fixedly installed on the rear end face of the control box, and the power switch is electrically connected to the microcontroller.

[0010] Furthermore, a buzzer is fixedly installed on the rear end surface of the control box, and the buzzer is electrically connected to the microcontroller; a timing module and a timing module are also provided inside the control box, and both the timing module and the timing module are electrically connected to the microcontroller; the initial timing value of the timing module and the initial timing value of the timing module are not limited and can be set according to actual needs; when the timing value of the timing module is reached, the timing module feedback signal is given to the microcontroller, and the microcontroller controls the drive motor to start, and simultaneously controls the proximity switch b to start sensing and the timing module to start timing; when the timing value of the timing module is reached, the timing module feedback signal is given to the microcontroller, and the microcontroller controls the buzzer to start buzzing; when the metal sensing block is within the sensing range of the proximity switch b, the proximity switch b feedback signal is given to the microcontroller, the microcontroller controls the drive motor to reverse, and simultaneously controls the timing module to close and the proximity switch a to start sensing; when the metal sensing block is within the sensing range of the proximity switch a, the proximity switch a feedback signal is given to the microcontroller, and the microcontroller controls the drive motor to close.

[0011] The utility model provides a sewage purification pretreatment device, which has the following beneficial effects:

[0012] Through the timing setting of the timing module and the meshing transmission of the gear and the rack, the utility model can automatically wipe and clean the first interception mesh plate and the second interception mesh plate used for sewage filtering and intercepting at regular intervals, so as to wipe the mesh holes in the first interception mesh plate and the second interception mesh plate that may be blocked to remove the blockage, thereby ensuring that on the basis of filtering and intercepting, it does not affect the passing efficiency of the sewage after filtering and intercepting.

[0013] The utility model can realize automatic determination of whether the driving motor for driving the meshing transmission of the gear and the rack is faulty through the timing setting of the timing module and the induction of the proximity switch b and the metal sensing block, so that when the driving motor fails, a buzzer warning can be realized in the first time to remind the staff and facilitate them to go to the maintenance in time to ensure that the automatic wiping and cleaning operation at each interval is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the embodiment of the present utility model, the drawings of the embodiment will be briefly introduced below.

[0015] The drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0016] In the attached picture:

[0017] Figure 1 The front end axial structure schematic diagram of the present application is shown;

[0018] Figure 2 The rear end axial structure schematic diagram of the present application is shown;

[0019] Figure 3 A schematic diagram of the structure of the present application in a split state is shown;

[0020] Figure 4 A schematic diagram of the top view of the pre-processing body of the present application is shown;

[0021] Figure 5 It shows a schematic diagram of the axial structure of the front wiping strip block of the present application;

[0022] Figure 6 The main structure diagram of the present application is shown;

[0023] Figure 7 This application shows Figure 6 AA cross-sectional structure diagram;

[0024] Figure 8 This application shows Figure 7 A schematic diagram of the partially enlarged structure at B in the middle;

[0025] Fig. 9shows a system block diagram of the present application;

[0026] Reference numerals list

[0027] 1. Pretreatment body; 101. Pretreatment tank; 102. Input pipe; 103. Input hole; 104. Control box; 105. Matching protrusion; 106. First interception mesh plate; 107. Second interception mesh plate; 108. Gear; 109. Limiting column; 1010. Output pipe; 1011. Output hole; 1012. Power switch; 1013. Buzzer; 1014. Support block; 1015. Driving motor; 1016. Proximity switch a; 1017. Proximity switch b; 1018. Induction tank; 1019. Transparent window; 1020. Timing module; 1021. Timing module; 1022. Battery; 1023. Microcontroller;

[0028] 2. Front wiping strip; 201. rack; 202. rear wiping strip; 203. connecting rod; 204. limit socket; 205. wiping brush; 206. metal sensing block. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the practical embodiment clearer, the technical solution of the practical embodiment will be clearly and completely described below in conjunction with the drawings of the practical embodiment. Obviously, the described embodiment is a part of the practical embodiment, not all of the embodiments. Based on the described practical embodiment, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this practical embodiment.

[0030] Example: Please refer to Figures 1 to 9 :

[0031] The utility model proposes a sewage purification pretreatment device, comprising: a pretreatment body 1, the top surface of the pretreatment body 1 in a rectangular block structure is provided with a pretreatment tank 101 in a rectangular groove structure; an input pipe 102 is fixedly installed on the upper side of the left end surface of the pretreatment body 1, and an input hole 103 connected to the pretreatment tank 101 is opened at the axial part of the input pipe 102; an output pipe 1010 is fixedly installed on the lower side of the right end surface of the pretreatment body 1, and an output hole 1011 connected to the pretreatment tank 101 is opened at the axial part of the output pipe 1010; a first interception mesh plate 106 is fixedly installed on the left side of the pretreatment tank 101, and a second interception mesh plate 107 is fixedly installed on the right side of the pretreatment tank 101, and the first interception mesh plate 106 is fixedly installed on the left side of the pretreatment tank 101, and the second interception mesh plate 107 is fixedly installed on the right side of the pretreatment tank 101. The plate 106 and the second intercepting mesh plate 107 are arranged in coordination for filtering and intercepting solid impurities contained in sewage, so as to realize pretreatment operation before sewage purification; a limiting column 109 is fixedly installed at the four edge angles of the bottom end surface of the inner end of the pretreatment tank 101 relative to the area between the first intercepting mesh plate 106 and the second intercepting mesh plate 107; a front wiping strip 2 with a rectangular strip structure is arranged above the right side of the first intercepting mesh plate 106, and a limiting socket 204 penetrating the bottom end surface of the front wiping strip 2 is provided at the front side and rear side edges of the top end of the front wiping strip 2, and the two limiting sockets 204 are respectively engaged with the two limiting columns 109 located on the left side; the left end surface of the front wiping strip 2 does not contact the first intercepting mesh plate 106 The right end faces of the front wiping strip 2 are in contact with each other, and a wiping brush 205 is fixedly installed on the left end face of the front wiping strip 2, the length of which is greater than the distance between the left end face of the front wiping strip 2 and the left end face of the first intercepting mesh plate 106; a rear wiping strip 202 with a rectangular strip structure is provided on the right side of the front wiping strip 2, and a limiting plug hole 204 that passes through the bottom end face of the rear wiping strip 202 is also provided on the front side and rear edge of the top end of the rear wiping strip 202, and the two limiting plug holes 204 are respectively engaged with the two limiting columns 109 located on the right side; the rear wiping strip 202 is located on the left side of the second intercepting mesh plate 107, and the right end face of the rear wiping strip 202 does not contact the left end face of the second intercepting mesh plate 107; the right end face of the rear wiping strip 202 is also fixed A wiping brush 205 is fixedly installed, and the length of the wiping brush 205 is greater than the distance between the right end face of the rear wiping strip block 202 and the right end face of the second intercepting mesh plate 107; the right end face of the front wiping strip block 2 and the left end face of the rear wiping strip block 202 are fixedly connected by two connecting rods 203; a rack 201 is fixedly installed on the rear side of the top end face of the front wiping strip block 2, and the tooth end of the rack 201 faces rearward; a support block 1014 is fixedly installed on the rear end face of the pretreatment body 1, and a group of driving motors 1015 are fixedly installed on the right end face of the support block 1014; a gear 108 is provided on the left side of the support block 1014, and the rotating shaft end of the driving motor 1015 passes through the support block 1014 and is fixedly installed with the gear 108; the gear 108 is meshed with the rack 201.

[0032] In the disclosed embodiment, a matching protrusion 105 in a rectangular strip structure is provided on the left side of the front end surface of the pretreatment body 1, and the matching protrusion 105 corresponds to the position of the limiting column 109 located on the left side; a sensing groove 1018 is opened on the upper side and the lower side of the front side surface of the inner end of the pretreatment tank 101, and a transparent window 1019 is sealed and installed at the opening end of the two sensing grooves 1018. Through the setting of the transparent window 1019, on the basis of ensuring the induction, sewage is prevented from entering the inside of the sensing groove 1018; the positions of the two sensing grooves 1018 correspond to the positions of the limiting column 109 located on the left side; a group of proximity switches a1016 are installed in the sensing groove 1018 located on the upper side, and a group of proximity switches a1016 are installed in the sensing groove 1018 located on the lower side. A group of proximity switches b1017 are installed; a metal sensing block 206 is embedded in the front end surface of the front wiping strip 2; when the top end surface of the front wiping strip 2 is at the same horizontal plane as the top end surface of the pretreatment body 1, the metal sensing block 206 is within the sensing range of the proximity switch a1016; when the bottom end surface of the front wiping strip 2 contacts the bottom surface of the inner end of the pretreatment tank 101, the metal sensing block 206 is within the sensing range of the proximity switch b1017; a control box 104 is fixedly installed on the rear end surface of the pretreatment body 1, and a microcontroller 1023 is arranged inside the control box 104, and the drive motor 1015, the proximity switch a1016 and the proximity switch b1017 are all electrically connected to the microcontroller 1023; the control box 104 also has A storage battery 1022 is provided, and the storage battery 1022 is electrically connected to the microcontroller 1023, and the storage battery 1022 is connected to an external power source; a power switch 1012 is fixedly installed on the rear end surface of the control box 104, and the power switch 1012 is electrically connected to the microcontroller 1023; a buzzer 1013 is also fixedly installed on the rear end surface of the control box 104, and the buzzer 1013 is electrically connected to the microcontroller 1023; a timing module 1020 and a timing module 1021 are also provided inside the control box 104, and the timing module 1020 and the timing module 1021 are both electrically connected to the microcontroller 1023; the initial timing value of the timing module 1020 and the initial timing value of the timing module 1021 are not limited, and can be set according to actual needs; when the timing module 1020 is reached, the timing module 1021 is set to the same value as the microcontroller 1023; the timing module 1020 is set to the same value as the microcontroller 1023; the timing module 1020 is set to the same value as the microcontroller 1023; the timing module 1020 is set to the same value as the microcontroller 1023; the timing module 1020 is set to the same value as the microcontroller 1023; the timing module 1021 ... 020 timing value, the timing module 1020 feedback signal is given to the microcontroller 1023, the microcontroller 1023 controls the drive motor 1015 to start, and simultaneously controls the proximity switch b1017 to start sensing and the timing module 1021 to start timing; when the timing value of the timing module 1021 is reached, the timing module 1021 feedback signal is given to the microcontroller 1023, and the microcontroller 1023 controls the buzzer 1013 to start buzzing; when the metal sensing block 206 is within the sensing range of the proximity switch b1017, the proximity switch b1017 feedback signal is given to the microcontroller 1023, the microcontroller 1023 controls the drive motor 1015 to reverse, and simultaneously controls the timing module 1021 to close and the proximity switch a1016 to start sensing;When the metal sensing block 206 is within the sensing range of the proximity switch a1016, the proximity switch a1016 provides a feedback signal to the microcontroller 1023, and the microcontroller 1023 controls the drive motor 1015 to turn off. ;

[0033] The working principle of this embodiment:

[0034] The sewage is input into the pretreatment tank 101 through the input hole 103, and the sewage input into the pretreatment tank 101 is filtered and intercepted by the first interception mesh plate 106 and the second interception mesh plate 107, so that the solid impurities contained in the sewage are intercepted and filtered, and the sewage is purified and pretreated, and the filtered and intercepted sewage is discharged through the output hole 1011 to be transported to the next sewage purification process;

[0035] In daily use, when the timing value of the timing module 1020 is reached, the timing module 1020 feedbacks a signal to the microcontroller 1023, and the microcontroller 1023 controls the drive motor 1015 to start, and the drive motor 1015 drives the gear 108 to rotate, and the gear 108 will engage the transmission rack 201. At this time, driven by the rack 201, the front wiping strip 2 moves downward along the pretreatment tank 101 through the sliding connection between the limit socket 204 and the limit column 109, and the rear wiping strip 202 fixedly connected to the front wiping strip 2 through the connecting rod 203 is also connected to the limit socket 204 through the limit socket 204. The sliding plug-in cooperation of the limiting column 109 moves downward synchronously along the pretreatment tank 101, and when the front wiping strip block 2 and the rear wiping strip block 202 move downward along the pretreatment tank 101, the wiping brush 205 fixedly installed on the left end face of the front wiping strip block 2 wipes and cleans the first interception mesh plate 106, and the wiping brush 205 fixedly installed on the right end face of the rear wiping strip block 202 wipes and cleans the second interception mesh plate 107, so that the wiping brush 205 wipes and cleans the blocked mesh holes in the first interception mesh plate 106 and the second interception mesh plate 107 to remove the blockage;

[0036] Furthermore, the timing module 1020 gives a feedback signal to the microcontroller 1023. The microcontroller 1023 controls the start of the drive motor 1015, and also controls the proximity switch b1017 to start the sensing and the timing module 1021 to start the timing. When the current wiping strip 2 moves downward along the pretreatment tank 101 until its bottom end surface contacts the bottom surface of the inner end of the pretreatment tank 101, the metal sensing block 206 is within the sensing range of the proximity switch b1017. The proximity switch b1017 gives a feedback signal to the microcontroller 1023, and the microcontroller 1023 controls the drive motor 1015 to reverse the shaft end to start the wiping strip 206. The meshing transmission of the gear 108 and the rack 201 drives the front wiping strip 2 to move upward along the pretreatment tank 101, and at the same time, the microcontroller 1023 controls the proximity switch a1016 to sense and start and close the timing module 1021. When the front wiping strip 2 moves upward along the pretreatment tank 101 until its top surface is at the same level as the top surface of the pretreatment body 1, the metal sensing block 206 is within the sensing range of the proximity switch a1016, and the proximity switch a1016 feedbacks a signal to the microcontroller 1023, and the microcontroller 1023 controls the drive motor 1015 to turn off, thereby completing the wiping and cleaning operation.

[0037] Furthermore, when the drive motor 1015 fails and is unable to bring the metal sensing block 206 within the sensing range of the proximity switch b1017 through the meshing transmission of the gear 108 and the rack 201 within the timing time of the timing module 1021, when the timing value of the timing module 1021 is reached, the timing module 1021 gives a feedback signal to the microcontroller 1023, and the microcontroller 1023 controls the buzzer 1013 to start buzzing. The buzzing alarm is used to remind the staff so that they can go to repair the failed drive motor 1015 in time to ensure that the automatic wiping and cleaning operation at intervals is not affected.

[0038] In this article, there are a few points to note:

[0039] 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0040] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0041] The above are only specific implementation methods of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be covered by the protection scope of the present disclosure.

Claims

1. A sewage purification pretreatment device, characterized in that: include: A pretreatment body (1) is provided with a pretreatment tank (101) in a rectangular groove structure on the top surface of the pretreatment body (1) in a rectangular block structure; an input pipe (102) is fixedly installed on the upper side of the left end surface of the pretreatment body (1), and an input hole (103) connected to the pretreatment tank (101) is opened at the axial center of the input pipe (102); an output pipe (1010) is fixedly installed on the lower side of the right end surface of the pretreatment body (1), and an output hole (1011) connected to the pretreatment tank (101) is opened at the axial center of the output pipe (1010); a first intercepting block is fixedly installed on the left side of the inside of the pretreatment tank (101) The pretreatment tank (101) is provided with a mesh plate (106), and a second intercepting mesh plate (107) is fixedly installed on the right side of the interior of the pretreatment tank (101); a limiting column (109) is fixedly installed at the four edge angles of the inner bottom end surface of the pretreatment tank (101) relative to the area between the first intercepting mesh plate (106) and the second intercepting mesh plate (107); a front wiping strip (2) with a rectangular strip structure is provided on the upper right side of the first intercepting mesh plate (106), and a limiting plug hole (204) penetrating the bottom end surface of the front wiping strip (2) is provided on the front side and the rear side edge of the top end of the front wiping strip (2), and the two limiting plug holes (204) are respectively connected to the left side of the limiting plug hole (204). The left end face of the front wiping strip (2) does not contact the right end face of the first intercepting mesh plate (106), and a wiping brush (205) is fixedly mounted on the left end face of the front wiping strip (2), and the length of the wiping brush (205) is greater than the distance between the left end face of the front wiping strip (2) and the left end face of the first intercepting mesh plate (106); a rear wiping strip (202) with a rectangular strip structure is provided on the right side of the front wiping strip (2), and a limiting plug hole (204) penetrating the bottom end face of the rear wiping strip (202) is also provided on the front side and the rear side edge of the top end of the rear wiping strip (202). The two limiting plug holes (204) are The insertion holes (204) are respectively engaged with two limiting posts (109) located on the right side; the rear wiping strip (202) is located on the left side of the second intercepting mesh plate (107), and the right end surface of the rear wiping strip (202) does not contact the left end surface of the second intercepting mesh plate (107); a wiping brush (205) is also fixedly mounted on the right end surface of the rear wiping strip (202), and the length of the wiping brush (205) is greater than the distance between the right end surface of the rear wiping strip (202) and the right end surface of the second intercepting mesh plate (107); the right end surface of the front wiping strip (2) and the left end surface of the rear wiping strip (202) are fixedly connected via two connecting rods (203).

2. A sewage purification pretreatment device according to claim 1, characterized in that: A rack (201) is fixedly mounted on the rear side of the top end surface of the front wiping strip block (2), with the gear end of the rack (201) facing rearwards; a support block (1014) is fixedly mounted on the rear end surface of the pretreatment body (1), and a group of drive motors (1015) are fixedly mounted on the right end surface of the support block (1014); a gear (108) is provided on the left side of the support block (1014), and the rotating shaft end of the drive motor (1015) passes through the support block (1014) and is fixedly mounted on the gear (108); the gear (108) is meshed with the rack (201).

3. A sewage purification pretreatment device according to claim 2, characterized in that: A matching protrusion (105) in a rectangular strip structure is arranged on the left side of the front end surface of the pretreatment body (1), and the matching protrusion (105) corresponds to the position of a limit column (109) located on the left side; a sensing groove (1018) is opened on the upper side and the lower side of the front side of the inner end of the pretreatment groove (101), and a transparent window (1019) is sealed and installed at the opening end of the two sensing grooves (1018); the positions of the two sensing grooves (1018) correspond to the positions of the limit column (109) located on the left side; a group of proximity switches a (1016) are installed in the sensing groove (1018) located on the upper side, and a group of proximity switches b (1017) are installed in the sensing groove (1018) located on the lower side.

4. A sewage purification pretreatment device according to claim 3, characterized in that: A metal sensing block (206) is embedded in the front end surface of the front wiping strip (2); when the top end surface of the front wiping strip (2) and the top end surface of the pretreatment body (1) are in the same horizontal plane, the metal sensing block (206) is within the sensing range of the proximity switch a (1016); when the bottom end surface of the front wiping strip (2) contacts the bottom end surface of the inner end of the pretreatment tank (101), the metal sensing block (206) is within the sensing range of the proximity switch b (1017).

5. A sewage purification pretreatment device according to claim 4, characterized in that: A control box (104) is fixedly mounted on the rear end face of the pre-processing body (1), a microcontroller (1023) is arranged inside the control box (104), and a drive motor (1015), a proximity switch a (1016), and a proximity switch b (1017) are all electrically connected to the microcontroller (1023); a storage battery (1022) is also arranged inside the control box (104), the storage battery (1022) is electrically connected to the microcontroller (1023), and the storage battery (1022) is externally connected to a power source; a power switch (1012) is fixedly mounted on the rear end face of the control box (104), and the power switch (1012) is electrically connected to the microcontroller (1023).

6. A sewage purification pretreatment device according to claim 5, characterized in that: A buzzer (1013) is also fixedly mounted on the rear end surface of the control box (104), and the buzzer (1013) is electrically connected to the microcontroller (1023). A timing module (1020) and a timing module (1021) are also provided inside the control box (104), and both the timing module (1020) and the timing module (1021) are electrically connected to the microcontroller (1023). The initial timing value of the timing module (1020) and the initial timing value of the timing module (1021) are not limited and can be set according to actual needs. When the timing value of the timing module (1020) is reached, the timing module (1020) feeds back a signal to the microcontroller (1023), and the microcontroller (1023) controls the drive motor (1015) to start, and simultaneously controls the proximity switch b (1017) to start induction and the timing module (1021) to start. ) timing starts; when the timing value of the timing module (1021) is reached, the timing module (1021) feedback signal is given to the microcontroller (1023), and the microcontroller (1023) controls the buzzer (1013) to start buzzing; when the metal sensing block (206) is within the sensing range of the proximity switch b (1017), the proximity switch b (1017) feedback signal is given to the microcontroller (1023), the microcontroller (1023) controls the drive motor (1015) to reverse, and at the same time controls the timing module (1021) to turn off and the proximity switch a (1016) to start sensing; when the metal sensing block (206) is within the sensing range of the proximity switch a (1016), the proximity switch a (1016) feedback signal is given to the microcontroller (1023), and the microcontroller (1023) controls the drive motor (1015) to turn off.

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