Industrial wastewater pretreatment device

Abstract

The invention belongs to the technical field of wastewater treatment equipment, and provides an industrial wastewater pretreatment device which comprises a tank body, a first grid group, a second grid group, an oil scraping assembly and an oil collecting tank, and the first grid group is arranged in the tank body; the second grid group is arranged in the tank body and is positioned behind the first grid group along the flowing direction of the wastewater; the oil scraping assembly is arranged at the top of the tank body in a lifting manner and is positioned behind the second grid group along the wastewater flowing direction; the oil collecting tank is arranged on the tank body, is positioned on one side, far away from the second grating group, of the oil scraping assembly and is used for collecting oil scraped by the oil scraping assembly. By means of the technical scheme, the problems that an existing wastewater pretreatment device is poor in filtering effect, and manual deoiling is needed are solved.

Description

Technical Field

[0001] The invention relates to wastewater treatment equipment, in particular to an industrial wastewater pretreatment device. Background Art

[0002] Industrial wastewater treatment is a complex and important process, the main goal of which is to remove harmful substances from wastewater in order to meet environmental emission standards and achieve wastewater reuse. Industrial wastewater treatment mainly includes pretreatment area, reaction area, sedimentation area, post-treatment area and sludge treatment system. The pretreatment area mainly performs preliminary treatment on wastewater to remove large particles of impurities, grease, etc. in the wastewater. The currently widely used pretreatment devices have poor filtering effects on large particles of impurities, and manual degreasing is required, which is not easy to operate, and the grease removal efficiency is low and incomplete. Therefore, there is an urgent need for an industrial wastewater pretreatment device with good filtering and degreasing effects and convenient degreasing operation. Summary of the invention

[0003] The main purpose of the present invention is to provide an industrial wastewater pretreatment device to solve the problem that the existing wastewater pretreatment device has poor filtering effect and requires manual degreasing.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: An industrial wastewater pretreatment device, comprising: Pool body; a first grille group, the first grille group being arranged in the pool body; a second grid group, the second grid group being arranged in the tank body and located behind the first grid group along the flow direction of the wastewater; An oil scraper assembly, which is lifted and arranged on the top of the tank body and is located behind the second grid group along the flow direction of the wastewater; An oil collecting trough is arranged on the pool body and is located on a side of the oil scraping assembly away from the second grid group, and is used to collect the oil scraped by the oil scraping assembly.

[0005] As a further technical solution, the first grid group includes a plurality of first grid bars arranged vertically, a first gap for wastewater to pass through is provided between adjacent first grid bars, and the ends of the plurality of first grid bars are synchronously lifted and lowered in the pool body through a connecting rod mechanism.

[0006] As a further technical solution, the connecting rod mechanism includes: A first power assembly, wherein the first power assembly is arranged on the pool body; A sliding plate, the sliding plate is vertically slidably disposed in the pool body through the first power assembly, and the sliding plate is provided with a limiting hole vertically disposed in the length direction; A fixed plate, the fixed plate is fixedly arranged on the side wall of the tank body and is located between the end of the first grille bar and the sliding plate, and a first sliding hole is vertically arranged along the length direction on the fixed plate; A first connecting rod, wherein the first connecting rods are arranged in a plurality in a vertical arrangement, wherein one of the first connecting rods is fixedly connected to the fixed plate, another of the first connecting rods is fixedly connected to the sliding plate, and the remaining first connecting rods are all slidably arranged on the sliding plate in a vertical direction, and the plurality of the first connecting rods are fixedly connected to the plurality of the first grille bars respectively through connecting rods, and the connecting rods are slidably arranged in the vertical direction through the limiting holes and the first sliding holes, and the first connecting rods are provided with second sliding holes arranged in a transverse direction in a length direction; The second connecting rod is multiple and one second connecting rod is arranged between adjacent first connecting rods. Both ends of the second connecting rod are respectively rotated and slid laterally in the corresponding second sliding hole.

[0007] As a further technical solution, the second grid group includes a plurality of second grid bars arranged vertically, a second gap for wastewater to pass through is provided between adjacent second grid bars, and the ends of the plurality of second grid bars arranged at intervals are synchronously rotated and arranged in the pool body through a transmission mechanism.

[0008] As a further technical solution, the transmission mechanism includes: A second power assembly, wherein the second power assembly is disposed on the pool body; A first rack, the first rack being vertically slidably disposed in the pool body through the second power assembly; The first gears are multiple and arranged vertically, all of which are rotatably arranged in the pool body and are respectively fixedly connected to multiple second grille bars arranged at intervals, and the multiple first gears are all meshed with the first rack.

[0009] As a further technical solution, the cell body comprises: A pretreatment tank, wherein the first grid group and the second grid group are both arranged in the pretreatment tank; A sedimentation tank, wherein the sedimentation tank is connected to the tail end of the pretreatment tank, the bottom of the sedimentation tank is inclined, and the high end is close to the pretreatment tank, and the oil scraping assembly is arranged on the top of the sedimentation tank; As a further technical solution, the oil scraping assembly includes: A lifting frame, the lifting frame is lifted and arranged on the top of the sedimentation tank; A chain assembly, wherein the chain assembly is transmission-arranged on the lifting frame; An oil scraper box is fixedly arranged on the chain assembly and is rotatably arranged on the top of the sedimentation tank through the chain assembly. The oil collecting trough is slidably arranged on the side of the chain assembly away from the second grid group for receiving the oil in the oil scraper box.

[0010] As a further technical solution, an oil receiving plate is fixedly arranged on the lifting frame, the oil receiving plate is located in the middle of the chain assembly, an oil receiving groove is formed between the oil receiving plate and the lifting frame, the oil receiving plate is inclined, and an oil outlet connected to the oil receiving groove is opened on the lifting frame on the lower end side of the oil receiving plate.

[0011] As a further technical solution, it also includes: A knocking assembly, the knocking assembly is located above the oil collecting tank and is used to knock the top of the oil scraper box. The knocking assembly includes: A mounting frame, the mounting frame is fixedly arranged on the top of one end of the sedimentation tank away from the pretreatment tank; A sliding seat, the sliding seat is vertically slidably arranged on the mounting frame, a stopper is fixedly arranged on the top of the sliding seat, a first inclined surface is arranged at the end of the stopper away from the sliding seat, and a through hole is vertically opened on the stopper; A sliding block, the sliding block is vertically slidably arranged on the sliding seat, a first latching tooth is fixedly arranged on the side of the sliding block away from the sliding seat, a limiting rod is fixedly arranged on the end of the sliding block close to the stopper, the limiting rod is vertically slidably arranged in the through hole, and a limiting block is fixedly arranged on the side wall of the stopper away from the sliding block; A first spring, wherein the first spring is sleeved on the limiting rod, and one end of the first spring abuts against the stopper, and the other end abuts against the sliding block; A rotating rod, the rotating rod is rotatably arranged on the mounting frame and is located at a side of the sliding block away from the sliding seat, a second latching tooth for cooperating with the first latching tooth is fixedly arranged on a side of the rotating rod close to the sliding block, and a second inclined surface for cooperating with the first inclined surface is arranged at an end of the rotating rod close to the stopper; A second spring is disposed laterally on a side of the rotating rod away from the sliding block, and one end of the second spring is rotatably connected to the rotating rod, and the other end of the second spring is rotatably connected to the mounting bracket.

[0012] As a further technical solution, the oil collecting tank and the sliding seat are synchronously slidably arranged through a linkage assembly, and the linkage assembly includes: A second rack, the second rack being slidably disposed on the mounting frame and fixedly connected to the sliding seat; A driving gear, which is rotatably arranged on the mounting frame by a first motor and meshes with the second rack; A third gear, the third gear is rotatably disposed on the mounting frame and meshes with the driving gear; A push rod, one end of which is fixedly connected to the third gear, and the other end of which is in sliding contact with an end of the oil collecting tank away from the oil scraping assembly; The third spring is two in number and is respectively arranged on both sides of the oil collecting groove along the sliding direction of the oil collecting groove, with one end abutting against the oil collecting groove and the other end abutting against the mounting frame.

[0013] The beneficial effects of the present invention are: The present invention has a simple structure, and realizes secondary filtration of large particle impurities by setting the first grid group and the second grid group, thereby enhancing the filtration effect and avoiding the problem that a grid group with extremely small gaps is easily blocked and affects the wastewater filtration efficiency. By setting the oil scraping assembly and the oil collecting tank, the oil scraping assembly cooperates with the oil collecting tank to scrape the waste grease in the pool body into the oil collecting tank for collection, which saves manpower and is practical and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 for Figure 1 A schematic diagram of the enlarged structure of part A; Figure 4 is a schematic structural diagram of the second grid bar of the present invention; Figure 5 Schematic diagram of the changing state of the oil collecting tank and the knocking assembly of the present invention Figure 1 ; Figure 6 Schematic diagram of the changing state of the oil collecting tank and the knocking assembly of the present invention Figure 2 ; Figure 7 Schematic diagram of the changing state of the oil collecting tank and the knocking assembly of the present invention Figure 3 .

[0016] Description of Reference Numerals 1. Tank body; 1001. Pretreatment tank; 1002. Sedimentation tank; 2. First grid group; 21. First grid bar; 3. Second grid group; 31. Second grid bar; 4. Oil scraper assembly; 41. Lifting frame; 42. Chain assembly; 43. Oil scraper box; 5. Oil collecting tank; 6. Connecting rod mechanism; 61. First power assembly; 62. Sliding plate; 63. Limiting hole; 64. Fixed plate; 65. First connecting rod; 66. Second sliding hole; 67. Second connecting rod; 7. Transmission mechanism; 71. Second power assembly; 72. First rack; 73. First Gear; 8. Oil receiving plate; 9. Oil outlet; 10. Beating assembly; 101. Mounting frame; 102. Sliding seat; 103. Stop block; 104. Sliding block; 105. First latching tooth; 106. Limit rod; 107. Limit block; 108. First spring; 109. Rotating rod; 1010. Second latching tooth; 1011. Second spring; 11. Linkage assembly; 111. Second rack; 112. Driving gear; 113. Third gear; 114. Push rod; 115. Third spring; 12. Second motor; 13. Screw rod; 14. Screw block. DETAILED DESCRIPTION

[0017] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0018] like Figure 1-Figure 7 As shown, the present invention proposes an industrial wastewater pretreatment device, which mainly includes a tank body 1, a first grid group 2, a second grid group 3, an oil scraper assembly 4, an oil collecting tank 5 and a knocking assembly 10.

[0019] The tank body 1 includes a pretreatment tank 1001 and a sedimentation tank 1002. The sedimentation tank 1002 is connected to the tail end of the pretreatment tank 1001. The bottom of the sedimentation tank 1002 is inclined, and the high end is close to the pretreatment tank 1001. The bottom side wall of the sedimentation tank 1002 is provided with a discharge port, which is located at the lower end of the bottom of the sedimentation tank 1002, which is conducive to the sand and soil settled to the bottom of the tank to gather at the lower end of the bottom of the sedimentation tank 1002 and discharge from the discharge port, and is also convenient for the later cleaning of the bottom sand and soil. The first grid group 2 and the second grid group 3 are arranged in the pretreatment tank 1001 along the flow direction of the wastewater. The oil scraper assembly 4 is lifted and arranged at the top of the sedimentation tank 1002 and is located behind the second grid group 3 along the flow direction of the wastewater. The oil collecting tank 5 is arranged on the sedimentation tank 1002 and is located on the side of the oil scraper assembly 4 away from the second grid group 3, which is used to collect the oil scraped by the oil scraper assembly 4.

[0020] The first grille group 2 includes a plurality of first grille bars 21 arranged vertically, and a first gap for wastewater to pass through is provided between adjacent first grille bars 21. The ends of the plurality of first grille bars 21 are synchronously lifted and lowered in the pretreatment tank 1001 through a connecting rod mechanism 6. Specifically, the connecting rod mechanism 6 includes a first power assembly 61, a sliding plate 62, a fixed plate 64, a first connecting rod 65, and a second connecting rod 67. The first power assembly 61 is provided on the tank body 1, and the sliding plate 62 is vertically slidably provided in the tank body 1 through the first power assembly 61. A limiting hole 63 vertically provided in the length direction is provided on the sliding plate 62. The fixed plate 64 is fixedly provided on the side wall of the tank body 1 and is located between the end of the first grille bar 21 and the sliding plate 62. A first sliding hole vertically provided in the length direction is provided on the fixed plate 64. The first sliding hole coincides with the limiting hole 63. The first connecting rod 65 is a plurality of first connecting rods arranged vertically, and the first sliding hole coincides with the limiting hole 63. One of the first connecting rods 65 is fixedly connected to the fixed plate 64, another first connecting rod 65 is fixedly connected to the sliding plate 62, and the remaining first connecting rods 65 are all vertically slidably set on the sliding plate 62. Multiple first connecting rods 65 are fixedly connected to multiple first grille bars 21 through connecting rods, which are vertically slidable and penetrate the limiting holes 63 and the first sliding holes. The first connecting rod 65 is provided with a second sliding hole 66 which is horizontally arranged in the length direction. There are multiple second connecting rods 67, and a second connecting rod 67 is arranged between adjacent first connecting rods 65. The two ends of the second connecting rod 67 are respectively rotated and horizontally slidable in the corresponding second sliding holes 66.

[0021] In this embodiment, the connecting rod mechanism 6 is capable of adjusting the gap size between multiple first grille bars 21. The specific operating steps are: the first power component 61 drives the sliding plate 62 to rise and fall, and the lifting and lowering of the sliding plate 62 drives the first connecting rod 65 fixedly connected thereto to rise and fall, thereby changing the distance between the first connecting rod 65 and the first connecting rod 65 fixedly set on the fixed plate 64, and driving the end of each second connecting rod 67 to slide horizontally in the second sliding hole 66. Since the first connecting rods 65 are slidably connected by the second connecting rod 67, the change in the distance between any two first connecting rods 65 can drive multiple first connecting rods 65 to slide synchronously, and make the distance between adjacent first connecting rods 65 the same, thereby driving multiple first grille bars 21 to rise and fall and slide, and finally the gaps between adjacent first grille bars 21 are the same, completing the adjustment of the gap size between the first grille bars 21 to meet different usage requirements.

[0022] The second grid group 3 includes a plurality of second grid bars 31 arranged vertically, and a second gap for wastewater to pass through is provided between adjacent second grid bars 31. The ends of the plurality of second grid bars 31 arranged at intervals are synchronously rotated and arranged in the pretreatment tank 1001 through a transmission mechanism 7. Specifically, the transmission mechanism 7 includes a second power assembly 71, a first rack 72 and a first gear 73. The second power assembly 71 is arranged on the pretreatment tank 1001. The first rack 72 is vertically slidably arranged in the pretreatment tank 1001 through the second power assembly 71. The first gear 73 is a plurality of vertically arranged, all of which are rotatably arranged in the pretreatment tank 1001 and are respectively fixedly connected to the plurality of second grid bars 31 arranged at intervals. The other second grid bars 31 are fixedly arranged in the pretreatment tank 1001. The plurality of first gears 73 are all meshed with the first rack 72. Figure 4 As shown, the second grid bar 31 rotates with its transverse central axis as the rotation axis, so as to ensure that after the rotatable second grid bar 31 rotates a certain angle, the minimum gap between the second grid bars 31 fixedly arranged on both sides thereof is the same in size.

[0023] In this embodiment, the transmission mechanism 7 drives the second grille bars 31 to rotate. The specific operation steps are: the second power assembly 71 drives the first rack 72 to rise and fall and slide, and the first rack 72 drives the gears to rotate, thereby driving the second grille bars 31 arranged at intervals to rotate in the same direction by a certain angle, and adjusting the minimum distance between these second grille bars 31 and the second grille bars 31 fixedly arranged on both sides thereof, thereby achieving the purpose of adjusting the gap size between the second grille bars 31. In this embodiment, when the fixed second grille bars 31 are parallel to the rotatable second grille bars 31, the gap between the second grille bars 31 is the largest, and the width of the maximum gap is smaller than the minimum width of the gap between the first grille bars 21, thereby achieving secondary filtration.

[0024] The first power assembly 61 and the second power assembly 71 both include a second motor 12, a screw rod 13 and a wire block 14. The second motor 12 is fixedly arranged on the outer wall of the pretreatment tank 1001. The screw rod 13 is arranged in the vertical direction and is rotatably arranged on the pretreatment tank 1001. One end of the screw rod 13 is fixedly connected to the output shaft of the second motor 12. The wire block 14 is inserted on the screw rod 13 and cooperates with the screw rod 13. One end of the wire block 14 is fixedly connected to the sliding plate 62 or the first rack 72. The first power assembly 61 and the second power assembly 71 drive the sliding plate 62 and the first rack 72 to rise and fall and slide respectively. Specifically, the second motor 12 is started to drive the screw rod 13 to rotate, and the screw rod 13 drives the wire block 14 to rise and fall and slide thereon, thereby driving the sliding plate 62 or the first rack 72 to rise and fall and slide.

[0025] The oil scraper assembly 4 includes a lifting frame 41, a chain assembly 42 and an oil scraper box 43. The lifting frame 41 is lifted and arranged at the top of the sedimentation tank 1002, which is conducive to adjusting the height of the oil scraper assembly 4 to adapt to the water surface height. The chain assembly 42 is transmission-arranged on the lifting frame 41. The specific structure of the chain assembly 42 is prior art and will not be elaborated here. The oil scraper box 43 is fixedly arranged on the chain of the chain assembly 42 and is arranged at the top of the sedimentation tank 1002 as the chain rotates to scrape the oil layer on the top of the sedimentation tank 1002. An oil receiving plate 8 is fixedly provided on the lifting frame 41, and the oil receiving plate 8 is located in the middle of the chain assembly 42. An oil receiving groove is formed between the oil receiving plate 8 and the lifting frame 41. The oil receiving plate 8 is tilted, and an oil outlet 9 connected to the oil receiving groove is opened on the lifting frame 41 on the lower end side of the oil receiving plate 8. The oil collecting groove 5 is slidably provided on the side of the chain assembly 42 away from the second grid group 3, and is used to receive the oil in the oil scraper box 43. That is, when the opening of the oil scraper box 43 is downward, the oil collecting groove 5 is located directly below the oil scraper box 43, so that the oil in the oil scraper box 43 is poured into the oil collecting groove 5. When the scraper box 43 is located at the bottom of the chain assembly 42, the oil layer on the upper layer of the water surface is scraped. When the scraper box 43 is located at the top of the chain assembly 42, part of the oil in the scraper box 43 is spilled onto the oil receiving plate 8, flows to the lowest end along the inclined surface of the oil receiving plate 8, and is discharged from the oil outlet 9, thereby preventing the oil spilled from the scraper box 43 from spilling into the sedimentation tank 1002 and causing the problem of low scraping efficiency. The oil outlet 9 can be connected to the oil collecting tank 5 through a long hose, so that the oil on the oil receiving plate 8 flows into the oil collecting tank 5 through the long hose.

[0026] The knocking assembly 10 is located above the oil collecting tank 5 and is used to knock the top of the oil scraper box 43. The knocking assembly 10 includes a mounting frame 101, a sliding seat 102, a sliding block 104, a first spring 108, a rotating rod 109 and a second spring 1011. The mounting frame 101 is fixedly arranged on the top of the end of the sedimentation tank 1002 away from the pretreatment tank 1001, and the sliding seat 102 is vertically slidably arranged on the mounting frame 101. A stopper 103 is fixedly arranged on the top of the sliding seat 102. The stopper 103 is far away from the pretreatment tank 1001. A first inclined surface is provided at the end away from the sliding seat 102, a through hole is vertically opened on the stopper 103, the sliding block 104 is vertically slidably arranged on the sliding seat 102, a first latching tooth 105 is fixedly arranged on the side of the sliding block 104 away from the sliding seat 102, a limiting rod 106 is fixedly arranged at the end of the sliding block 104 close to the stopper 103, the limiting rod 106 is vertically slidably penetrated in the through hole, and the limiting rod 106 is fixedly arranged on the side wall of the stopper 103 away from the sliding block 104. 107, which is conducive to limiting the lowest position of the sliding block 104 sliding downward to prevent the sliding block 104 from falling downward. The first spring 108 is sleeved on the limiting rod 106, and one end abuts against the stopper 103, and the other end abuts against the sliding block 104. The rotating rod 109 is rotatably set on the mounting frame 101 and is located on the side of the sliding block 104 away from the sliding seat 102. The second latching tooth 1010 used to cooperate with the first latching tooth 105 is fixedly set on the side of the rotating rod 109 close to the sliding block 104. The first latch tooth 105 and the second latch tooth 1010 are both ratchet teeth, which can only be engaged in one direction to avoid the problem of hindering the sliding block 104 from being retracted upward. The end of the rotating rod 109 close to the stop block 103 is provided with a second inclined surface for cooperating with the first inclined surface. The second spring 1011 is laterally arranged on the side of the rotating rod 109 away from the sliding block 104, and one end is rotatably connected to the rotating rod 109, and the other end is rotatably connected to the mounting frame 101. The elastic strength of the second spring 1011 is less than the elastic strength of the first spring 108.

[0027] like Figure 5 As shown, in the normal state of the striking assembly 10, the first latching tooth 105 and the second latching tooth 1010 are in a latching state, the first spring 108 is in a normal state or a slightly compressed state, and the stopper 103 is located above the rotating rod 109. Figure 6-Figure 7As shown, the specific operating steps of the knocking assembly 10 are as follows: the sliding seat 102 slides downward, driving the block 103 thereon to slide downward. Since the first latch tooth 105 contacts and engages with the second latch tooth 1010, the sliding block 104 and the limiting rod 106 cannot slide downward. At this time, as the sliding seat 102 and the block 103 continue to move downward, the block 103 compresses the first spring 108 to accumulate force. When the first inclined surface on the block 103 contacts the second inclined surface on the rotating rod 109 and continues to move downward, the block 103 gradually pushes the rotating rod 109 away from the sliding block 104 until the first latch tooth 105 is separated from the second latch tooth 1010. At this time, the first spring 108 is released, pushing the sliding block 104 to extend downward quickly, thereby striking the top of the oil scraper box 43, so that the grease in the oil scraper box 43 is discharged into the oil collecting groove 5 as much as possible, avoiding the grease sticking to the side wall of the oil scraper box 43 and improving the oil scraping efficiency. After the striking is completed, it is only necessary to slide the sliding seat 102 upwards to reset. In the present embodiment, a push rod 114 may also be provided below the sliding block 104 to give the sliding block 104 an upward thrust when the sliding block 104 is reset upwards, so as to ensure that the sliding block 104 is reset smoothly.

[0028] The oil collecting trough 5 is slidably arranged at the top of one end of the sedimentation tank 1002 away from the pretreatment tank 1001 in the transverse direction. The oil collecting trough 5 and the sliding seat 102 are synchronously slidably arranged through a linkage assembly 11. The linkage assembly 11 includes a second rack 111, a driving gear 112, a third gear 113, a push rod 114 and a third spring 115. The second rack 111 is slidably arranged on the mounting frame 101 and is fixedly connected to the sliding seat 102. The driving gear 112 is rotatably arranged on the mounting frame 101 by a first motor (not shown in the figure) and is meshed with the second rack 111. The third gear 113 is rotatably arranged on the mounting frame 101 and is meshed with the driving gear 112. One end of the push rod 114 is fixedly connected to the third gear 113, and the other end is slidably abutted against the end of the oil collecting trough 5 away from the oil scraping assembly 4. There are two third springs 115, which are respectively arranged on both sides of the oil collecting trough 5 along the sliding direction of the oil collecting trough 5, and one end abuts against the oil collecting trough 5, and the other end abuts against the mounting frame 101.

[0029] like Figure 5-Figure 7As shown, the specific operation steps of the linkage assembly 11 are as follows: the first motor is started to drive the active gear 112 to rotate, and the active gear 112 simultaneously drives the second rack 111 to rise and fall and the third gear 113 to rotate, and the second rack 111 drives the sliding seat 102 to rise and fall to realize the power storage and knocking action of the knocking assembly 10, and at the same time, the third gear 113 drives one end of the push rod 114 to rotate, so that the other end of the push rod 114 pushes the oil collecting tank 5 to slide in the direction close to the chain assembly 42 until it slides to the bottom of the knocking assembly 10, and at the same time, the push of the push rod 114 on the oil collecting tank 5 causes the oil collecting tank 5 to compress the third spring 115, and when the oil collection is completed and needs to be reset, the active gear 112 and the third gear 113 are reversed, driving the push rod 114 to reset, and at this time, the third spring 115 gives thrust to the oil collecting tank 5, driving the oil collecting tank 5 to reset. The linkage assembly 11 is set up to drive the knocking assembly 10 and the oil collecting tank 5 to operate simultaneously through a power, so that when the oil scraper box 43 opens downward, the knocking assembly 10 and the oil collecting tank 5 are respectively located above and below the oil scraper box 43. The structure is simple, the design is reasonable and ingenious, and the cost is saved.

[0030] During use of this embodiment, industrial wastewater continuously enters the pretreatment tank 1001 and is filtered twice through the first grid group 2 and the second grid group 3 in sequence, thereby filtering out large particles of impurities in the wastewater; the gap size between each first grid bar 21 and the gap size between each second grid bar 31 can be adjusted according to water quality requirements, thereby avoiding blockage while ensuring the filtering effect. At the same time, in the event of blockage, the gap between the first grid bars 21 and the gap between the second grid bars 31 can be increased to clear the blockage and avoid affecting the filtering effect.

[0031] Then the filtered wastewater flows into the sedimentation tank 1002, the silt in the wastewater sinks to the bottom of the sedimentation tank 1002, and the grease in the wastewater floats above the water surface. At this time, the lifting frame 41 is lifted and lowered to adjust the position of the oil scraper box 43, and the chain assembly 42 is started. The chain assembly 42 drives the oil scraper box 43 to rotate. When the oil scraper box 43 is located below the chain assembly 42, the oil scraper box 43 scrapes the grease above the water surface and continues to rotate around the outer periphery of the chain assembly 42. When the oil scraper box 43 is about to enter the curved section of the chain assembly 42 close to one end of the knocking assembly 10, the first motor starts to start. As the scraper box 43 rotates along the curved section, the end of the oil collecting trough 5 has slid to the bottom of the scraper box 43. At this time, the first spring 108 of the knocking assembly 10 is in the stage of accumulating force. When the scraper box 43 rotates to the point where the opening faces downward, the chain assembly 42 stops running. At this time, the first spring 108 of the knocking assembly 10 is released and knocks the top of the scraper box 43. The oil collecting trough 5 is located just below the opening of the scraper box 43 to receive the grease in the scraper box 43. Then the first motor reverses to reset the knocking assembly 10 and the oil collecting trough 5. The scraper box 43 continues to rotate to scrape the grease, and the above steps are repeated.

[0032] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiment is only a 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 creative work are within the scope of protection of the present invention.

Claims

1. An industrial wastewater pretreatment device, characterized in that: include: pool(1); A first grille group (2), the first grille group (2) being arranged in the pool body (1); a second grid group (3), the second grid group (3) being arranged in the tank body (1) and located behind the first grid group (2) along the flow direction of the wastewater; An oil scraper assembly (4), the oil scraper assembly (4) being arranged at the top of the tank body (1) in a lifting manner and being located behind the second grille assembly (3) along the flow direction of the wastewater; An oil collecting trough (5) is arranged on the tank body (1) and is located on a side of the oil scraping assembly (4) away from the second grid group (3), and is used to collect oil scraped by the oil scraping assembly (4).

2. An industrial wastewater pretreatment device as claimed in claim 1, characterized in that: The first grid group (2) comprises a plurality of first grid bars (22) arranged vertically, a first gap for wastewater to pass through is provided between adjacent first grid bars (21), and the ends of the plurality of first grid bars (21) are synchronously raised and lowered in the tank body (1) via a connecting rod mechanism (6).

3. An industrial wastewater pretreatment device as claimed in claim 2, characterized in that: The connecting rod mechanism (6) comprises: A first power assembly (61), wherein the first power assembly (61) is arranged on the pool body (1); A sliding plate (62), the sliding plate (62) being arranged in the pool body (1) by sliding vertically through the first power assembly (61), and the sliding plate (62) being provided with a limiting hole (63) arranged vertically in the length direction; a fixed plate (64), the fixed plate (64) being fixedly arranged on the side wall of the tank body (1) and being located between the end of the first grid bar (21) and the sliding plate (62), the fixed plate (64) being provided with a first sliding hole arranged vertically in the length direction; a first connecting rod (65), wherein the first connecting rod (65) is arranged in a plurality in a vertical arrangement, wherein one of the first connecting rods (65) is fixedly connected to the fixed plate (64), another of the first connecting rods (65) is fixedly connected to the sliding plate (62), and the remaining first connecting rods (65) are all arranged on the sliding plate (62) in a vertically sliding manner, wherein the plurality of first connecting rods (65) are fixedly connected to the plurality of first grille bars (21) via connecting rods, respectively, and the connecting rods are vertically slidably inserted into the limiting holes (63) and the first sliding holes, and the first connecting rods (65) are provided with second sliding holes (66) arranged in a transverse direction along the length direction; A second connecting rod (67), wherein the second connecting rod (67) is provided in plurality, and one second connecting rod (67) is provided between adjacent first connecting rods (65), and the two ends of the second connecting rod (67) are respectively rotated and laterally slidably provided in the corresponding second sliding hole (66).

4. An industrial wastewater pretreatment device as claimed in claim 1, characterized in that: The second grid group (3) comprises a plurality of second grid bars (31) arranged vertically, a second gap for wastewater to pass through is provided between adjacent second grid bars (31), and the ends of the plurality of second grid bars (31) arranged at intervals are synchronously rotated and arranged in the tank body (1) via a transmission mechanism (7).

5. An industrial wastewater pretreatment device as claimed in claim 4, characterized in that: The transmission mechanism (7) comprises: a second power assembly (71), wherein the second power assembly (71) is arranged on the pool body (1); a first rack (72), the first rack (72) being vertically slidably disposed in the pool body (1) via the second power assembly (71); A first gear (73), wherein the first gears (73) are arranged in a plurality in a vertical direction, are rotatably disposed in the pool body (1), and are respectively fixedly connected to the plurality of second grid bars (31) arranged at intervals, and the plurality of first gears (73) are all meshed with the first rack (72).

6. An industrial wastewater pretreatment device as claimed in claim 1, characterized in that: The cell body (1) comprises: A pretreatment tank (1001), wherein the first grid group (2) and the second grid group (3) are both arranged in the pretreatment tank (1001); A sedimentation tank (1002), wherein the sedimentation tank (1002) is connected to the tail end of the pretreatment tank (1001), the bottom of the sedimentation tank (1002) is arranged at an inclination, and the top end is close to the pretreatment tank (1001), and the oil scraping assembly (4) is arranged at the top of the sedimentation tank (1002).

7. An industrial wastewater pretreatment device as claimed in claim 6, characterized in that: The oil scraping assembly (4) comprises: A lifting frame (41), the lifting frame (41) being lifted and arranged on the top of the sedimentation tank (1002); A chain assembly (42), wherein the chain assembly (42) is transmission-arranged on the lifting frame (41); An oil scraper box (43) is fixedly arranged on the chain assembly (42) and is rotatably arranged at the top of the sedimentation tank (1002) through the chain assembly (42); the oil collecting trough (5) is slidably arranged on a side of the chain assembly (42) away from the second grid group (3) and is used to receive the oil in the oil scraper box (43).

8. An industrial wastewater pretreatment device as claimed in claim 7, characterized in that: An oil receiving plate (8) is fixedly arranged on the lifting frame (41), the oil receiving plate (8) is located in the middle of the chain assembly (42), an oil receiving groove is formed between the oil receiving plate (8) and the lifting frame (41), the oil receiving plate (8) is arranged obliquely, and an oil outlet (9) connected to the oil receiving groove is opened on the lifting frame (41) at the lower end side of the oil receiving plate (8).

9. An industrial wastewater pretreatment device as claimed in claim 7, characterized in that: Also includes: A knocking assembly (10), the knocking assembly (10) being located above the oil collecting tank (5) and being used to knock the top of the oil scraper box (43), the knocking assembly (10) comprising: A mounting frame (101), the mounting frame (101) being fixedly arranged on the top of an end of the sedimentation tank (1002) away from the pretreatment tank (1001); A sliding seat (102), the sliding seat (102) being slidably arranged on the mounting frame (101) in a vertical direction, a stopper (103) being fixedly arranged on the top of the sliding seat (102), a first inclined surface being arranged at an end of the stopper (103) away from the sliding seat (102), and a through hole being vertically opened on the stopper (103); A sliding block (104), the sliding block (104) being arranged on the sliding seat (102) in a vertical sliding manner, a first latching tooth (105) being fixedly arranged on a side of the sliding block (104) away from the sliding seat (102), a limiting rod (106) being fixedly arranged on an end of the sliding block (104) close to the stopper (103), the limiting rod (106) being arranged in a vertical sliding manner and penetrating the through hole, and a limiting block (107) being fixedly arranged on a side wall of the stopper (103) away from the sliding block (104); a first spring (108), the first spring (108) being sleeved on the limiting rod (106), with one end of the first spring abutting against the stopper (103) and the other end of the first spring abutting against the sliding block (104); a rotating rod (109), the rotating rod (109) being rotatably mounted on the mounting frame (101) and being located on a side of the sliding block (104) away from the sliding seat (102); a second latching tooth (1010) for cooperating with the first latching tooth (105) being fixedly mounted on a side of the rotating rod (109) close to the sliding block (104); and a second inclined surface for cooperating with the first inclined surface being mounted on an end of the rotating rod (109) close to the stopper (103); A second spring (1011), the second spring (1011) is arranged in a transverse direction on a side of the rotating rod (109) away from the sliding block (104), and one end of the second spring is rotatably connected to the rotating rod (109), and the other end of the second spring is rotatably connected to the mounting frame (101).

10. An industrial wastewater pretreatment device as claimed in claim 9, characterized in that: The oil collecting tank (5) and the sliding seat (102) are synchronously slidably arranged via a linkage assembly (11), wherein the linkage assembly (11) comprises: a second rack (111), the second rack (111) being slidably disposed on the mounting frame (101) and fixedly connected to the sliding seat (102); A driving gear (112), the driving gear (112) being rotatably arranged on the mounting frame (101) by a first motor and meshing with the second rack (111); a third gear (113), the third gear (113) being rotatably disposed on the mounting frame (101) and meshing with the driving gear (112); A push rod (114), one end of the push rod (114) being fixedly connected to the third gear (113), and the other end of the push rod (114) being in sliding contact with an end of the oil collecting tank (5) away from the oil scraping assembly (4); A third spring (115), wherein two third springs (115) are respectively arranged on both sides of the oil collecting groove (5) along the sliding direction of the oil collecting groove (5), and one end abuts against the oil collecting groove (5) and the other end abuts against the mounting frame (101).

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