Municipal drainage pretreatment equipment

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to municipal drainage pretreatment equipment which comprises a primary sedimentation tank, a water inlet is formed in the left side end surface of the primary sedimentation tank; a water outlet is formed in the right side end surface of the primary sedimentation tank; a collecting bin is fixedly mounted above the water outlet; a separation mechanism is arranged on the left side of the water outlet; the separating mechanism comprises a belt type filter screen; the belt type filter screen rotates on the two rotating rollers; the rotating roller positioned at the bottom rotates in the primary sedimentation tank; mounting plates are arranged on the two sides of the rotating roller located at the top, the mounting plates are mounted on the primary sedimentation tank, and the rotating roller located at the top rotates on the two mounting plates; evenly-arranged baffle plates are fixedly connected to the belt type filter screen, and evenly-arranged first leakage holes are formed in the baffle plates. A water control mechanism is arranged between the two mounting plates; an isolation mechanism is arranged above the rotating roller located at the bottom. And by arranging the primary settling tank, water in the garbage can be squeezed out, so that the water amount in the garbage is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, in particular to a municipal drainage pretreatment device. Background Art

[0002] With the acceleration of urbanization, municipal sewage contains not only domestic sewage, but also industrial wastewater, rainwater runoff, etc. Domestic sewage contains a large amount of organic matter, suspended solids, etc.; industrial wastewater may contain heavy metals, toxic and harmful substances and difficult-to-degrade organic pollutants; rainwater runoff will carry garbage, sediment, oil pollution, etc. on the surface;

[0003] Wastewater and rainwater contain a lot of harmful substances. If they are discharged directly into water or the ground without treatment, it will cause great harm to the environment and human health. Therefore, in order to avoid this situation, it is very necessary to pre-treat the wastewater or rainwater before discharge.

[0004] Drainage pretreatment can not only purify wastewater or rainwater, but also reduce the burden of the treatment process and improve the efficiency and quality of subsequent treatment. At the same time, drainage pretreatment is also a necessary measure to protect the environment and human health;

[0005] Drainage pretreatment is a purification method, which is mainly used for the preparation of wastewater and rainwater before discharge. The purpose of drainage pretreatment is to remove or reduce impurities and pollutants in wastewater or rainwater to a certain level, thereby reducing the burden of subsequent treatment processes and improving treatment efficiency and quality. Drainage pretreatment usually includes separation, coagulation, sedimentation and other steps;

[0006] When separating sewage, the filter screen is mainly used to intercept large suspended matter in the sewage, such as plastic bags, paper, branches and other large garbage. If the large suspended garbage is not removed in time, it will cause damage to the subsequent sewage treatment equipment;

[0007] When suspended garbage is filtered through a filter, as the amount of filtered sewage gradually increases, the garbage in the sewage will accumulate on the filter, causing the filter to become blocked. In the existing related technology, the garbage blocked at the filter can be discharged to avoid the filter from becoming blocked. However, when the garbage is discharged, a large amount of water will be carried with it, such as the water remaining in the garbage bag. When this part of the garbage containing water is taken out, the harmful substances in the water will also be taken out, which will cause harm to the external environment and increase the drying time of the garbage. Summary of the invention

[0008] In order to make up for the shortcomings of the prior art and solve the above technical problems, the present invention proposes a municipal drainage pretreatment device, which can squeeze out the water in the garbage by setting a primary sedimentation tank, thereby reducing the amount of water in the garbage. The specific structure is as follows;

[0009] A municipal drainage pretreatment device comprises a primary sedimentation tank; a water inlet is provided on the left end surface of the primary sedimentation tank; a water outlet is provided on the right end surface of the primary sedimentation tank;

[0010] A collection bin is fixedly installed above the water outlet; a separation mechanism is provided on the left side of the water outlet; the separation mechanism comprises a belt filter; the belt filter rotates on two rollers;

[0011] The roller at the bottom rotates in the primary sedimentation tank; the roller at the top is provided with mounting plates on both sides, and the mounting plates are mounted on the primary sedimentation tank, and the roller at the top rotates on the two mounting plates;

[0012] The belt filter is fixedly connected with evenly arranged baffles, and the baffles are provided with evenly arranged first leakage holes;

[0013] A water control mechanism is provided between the two mounting plates, and the water control mechanism is used to control the garbage in the water;

[0014] An inclined plate is provided on the left side of the rotating roller at the bottom, and an arc surface is provided on the side of the inclined plate close to the belt filter, and the rotating baffle plate will pass through the arc surface;

[0015] A baffle is rotatably mounted on one side of the inclined plate close to the rotating roller through a torsion spring, and the other side of the baffle is in contact with the belt filter;

[0016] An isolation mechanism is provided above the rotating roller at the bottom, and the isolation mechanism is used to isolate garbage floating on the water.

[0017] Preferably, the water control mechanism comprises a squeezing roller; the squeezing roller rotates between two mounting plates;

[0018] A first motor is fixedly mounted on one of the mounting plates, and the first motor is used to drive the squeezing roller to rotate counterclockwise;

[0019] The outer ring surface of the squeezing roller is provided with evenly arranged deep grooves, and the deep grooves are meshed with the baffles on the belt filter; the openings of the deep grooves are all provided with rounded corners;

[0020] In the initial state, one of the baffles extends into one of the deep grooves, and when the squeezing roller rotates, the deep grooves on the squeezing roller will mesh with the baffles in turn;

[0021] A support plate is provided in the belt filter below the squeezing roller, and the support plate is parallel to the belt filter; and both sides of the support plate are installed on the mounting plate.

[0022] Preferably, two sides of the support plate are provided with slide grooves on the two mounting plates, and the slide grooves are perpendicular to the belt filter;

[0023] Slide blocks are fixedly mounted on the two end surfaces of the support plate close to the slide slot, and the slide blocks slide in the slide slot;

[0024] A spring is fixedly connected to the bottom of the two sliding blocks, and the other side of the spring is connected to the bottom of the slide groove; the support plate is in contact with the upper belt filter in the initial state.

[0025] Preferably, the support plate comprises a bottom plate and a plurality of long blocks;

[0026] The slider is fixedly connected to the bottom plate; a slideway is provided on the top end surface of the bottom plate; long blocks arranged evenly are slidably connected in the slideway, and adjacent long blocks are fitted to each other;

[0027] A spring is fixedly connected to the bottom of each long block, and the other side of the spring is connected to the bottom of the slideway; a through hole is opened at the bottom of the bottom plate, and the through hole is used for water leakage.

[0028] Preferably, a top plate is slidably connected in the deep groove of each of the squeezing rollers;

[0029] A spring is fixedly connected to each of the top plates, and the other side of the spring is connected to the bottom of the deep groove. In the initial state, the top plate is located at the notch of the deep groove.

[0030] Preferably, the side walls of the left side of the belt filter on both sides of the primary sedimentation tank are provided with inclined grooves, and the inclined grooves and the belt filter are parallel to each other;

[0031] The isolation mechanism comprises a floating roller; a rotating rod is fixedly connected to the floating roller, and the rotating rod is located in two inclined grooves;

[0032] The outer ring surface of the floating roller is fixedly connected with evenly arranged rotating plates.

[0033] Preferably, a slide plate is slidably connected in each of the two chutes, and in the initial state, the slide plate partially extends out of the chutes and extends to above the primary sedimentation tank;

[0034] The two sides of the rotating rod rotate in the opposite slides respectively; the second motor is fixedly installed on one side of the slide extending above the primary sedimentation tank, and a pulley is installed on the rotating shaft of the second motor;

[0035] The belt pulley and the rotating roller are connected with a driving belt for common rotation. When the second motor rotates, the driving belt drives the rotating rod to rotate.

[0036] Preferably, each of the rotating plates is provided with evenly arranged second leakage holes.

[0037] The beneficial effects of the present invention are as follows:

[0038] 1. The municipal drainage pretreatment equipment described in the present invention can discharge garbage blocked at the belt filter by setting a circulating belt filter, thereby preventing the belt filter from being blocked by garbage at the belt filter position. At the same time, by setting a water control mechanism, water in the garbage can be squeezed out, thereby reducing the amount of water in the garbage, avoiding that when garbage with excessive water content is brought into the external environment, the external environment will be harmed due to the presence of harmful substances in the sewage. Since the water content in the garbage is reduced, the drying time of the garbage is also reduced.

[0039] 2. A municipal drainage pretreatment device described in the present invention, when the thickness of garbage at different positions on the same side of the baffle on the belt filter is different, when the squeezing roller squeezes the garbage, the long block under the thicker garbage slides downward a greater distance, and the long block under the thinner garbage slides downward a smaller distance. At this time, the distance the long block moves downward is determined by the thickness of the garbage. In this process, when squeezing garbage of different thicknesses on the same side of the baffle, the squeezing roller can squeeze the garbage of different thicknesses evenly, thereby avoiding the situation where the thickness of some garbage is high, resulting in the garbage with low thickness being unable to be squeezed thoroughly when the squeezing roller squeezes the garbage, resulting in the water in some garbage not being squeezed out. By providing a plurality of long blocks sliding downward, the squeezed garbage can be made to fit the long blocks below, thereby improving the effect of dehydrating the garbage.

[0040] 3. The municipal drainage pretreatment equipment described in the present invention can automatically adjust its position according to the height of the liquid level by setting a floating roller, and can block the garbage at the same time. Each time the rotating plate rotates, a part of the garbage can be taken away, so that the garbage can be transferred to the belt filter in batches, and then squeezed by the squeezing roller in batches, so as to avoid all the floating garbage floating to the belt filter position at one time, thereby avoiding too much garbage being directly taken away by the belt filter, making the garbage on the belt filter too thick, resulting in incomplete squeezing by the squeezing roller, so that the moisture in some garbage cannot be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] Figure 1 It is a structural diagram of the primary sedimentation tank of the present invention;

[0043] Figure 2 It is the internal structure diagram of the primary sedimentation tank of the present invention;

[0044] Figure 3 It is an exploded view of the separation mechanism, the water control mechanism and the isolation mechanism in the present invention;

[0045] Figure 4 The present invention Figure 3 A partial enlarged view of the middle part;

[0046] Figure 5 It is a structural diagram of the support plate in the present invention;

[0047] Figure 6 It is a top view of the primary settling tank of the present invention;

[0048] Figure 7 The present invention Figure 6 Sectional view at the middle BB;

[0049] Figure 8 The present invention Figure 7 A partial enlarged view of point C in the middle;

[0050] Fig. 9 The present invention Figure 7 A partial enlarged view of point D in the middle.

[0051] In the figure: 1, primary sedimentation tank; 11, water inlet; 12, water outlet; 13, collecting bin; 14, inclined plate; 15, baffle; 2, belt filter; 21, roller; 22, mounting plate; 23, baffle; 24, first leakage hole; 3, squeezing roller; 31, first motor; 32, deep groove; 33, top plate; 4, support plate; 41, slide; 42, slider; 43, bottom plate; 44, long block; 45, slide; 5, inclined trough; 51, floating roller; 52, rotating rod; 53, rotating plate; 54, slide plate; 55, second motor; 56, driving belt; 57, second leakage hole. DETAILED DESCRIPTION

[0052] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0053] Embodiment 1: Figures 1 to 9 As shown, a municipal wastewater pretreatment device according to the present invention comprises a primary sedimentation tank 1; a water inlet 11 is provided on the left end surface of the primary sedimentation tank 1; a water outlet 12 is provided on the right end surface of the primary sedimentation tank 1;

[0054] A collecting bin 13 is fixedly installed above the water outlet 12; a separation mechanism is provided on the left side of the water outlet 12; the separation mechanism comprises a belt filter 2; the belt filter 2 rotates on two rollers 21;

[0055] The roller 21 at the bottom rotates in the primary sedimentation tank 1; the roller 21 at the top is provided with mounting plates 22 on both sides, and the mounting plates 22 are mounted on the primary sedimentation tank 1, and the roller 21 at the top rotates on the two mounting plates 22;

[0056] The belt filter 2 is fixedly connected with evenly arranged baffles 23, and evenly arranged first leakage holes 24 are opened on the baffles 23;

[0057] A water control mechanism is provided between the two mounting plates 22, and the water control mechanism is used to control the garbage in the water;

[0058] The left side of the rotating roller 21 at the bottom is provided with an inclined plate 14, and the side of the inclined plate 14 close to the belt filter 2 is provided with an arc surface, and the rotating baffle 23 will pass through the arc surface;

[0059] The baffle plate 15 is rotatably mounted on one side of the inclined plate 14 close to the rotating roller 21 through a torsion spring, and the other side of the baffle plate 15 is in contact with the belt filter 2;

[0060] An isolation mechanism is provided above the rotating roller 21 at the bottom, and the isolation mechanism is used to isolate garbage floating on the water;

[0061] In this embodiment, the water control mechanism includes a squeezing roller 3; the squeezing roller 3 rotates between two mounting plates 22;

[0062] A first motor 31 is fixedly mounted on one of the mounting plates 22, and the first motor 31 is used to drive the squeezing roller 3 to rotate counterclockwise;

[0063] The outer ring surface of the squeezing roller 3 is provided with evenly arranged deep grooves 32, and the deep grooves 32 are meshed with the baffles 23 on the belt filter 2; the openings of the deep grooves 32 are all provided with rounded corners;

[0064] In the initial state, one of the baffles 23 extends into one of the deep grooves 32, and when the squeezing roller 3 rotates, the deep grooves 32 on the squeezing roller 3 will mesh with the baffles 23 in turn;

[0065] A support plate 4 is provided in the belt filter 2 below the squeezing roller 3, and the support plate 4 is parallel to the belt filter 2; both sides of the support plate 4 are mounted on the mounting plate 22;

[0066] Specifically, when pre-treating sewage, the water control mechanism is first started, and then the sewage is discharged from the water inlet 11 into the primary sedimentation tank 1. After the sewage enters the primary sedimentation tank 1, the sewage will carry the floating garbage to the water outlet 12. When the water control mechanism is started, the first motor 31 will drive the squeezing roller 3 to rotate counterclockwise slowly and uniformly. Since the baffle 23 on the belt filter 2 is engaged, the squeezing roller 3 will be engaged with the baffle 23 on the belt filter 2 in turn during the counterclockwise rotation of the squeezing roller 3, thereby driving the belt filter 2 rotates clockwise along the two rollers 21. During the clockwise rotation of the belt filter 2, the plurality of baffles 23 are driven to rotate clockwise. When the baffles 23 pass through the arc surface on the inclined plate 14, the baffles 23 rotate along the inclined surface. When the baffles 23 contact the baffle 15, the baffle 15 is pushed to rotate. After the baffles 23 pass through the baffle 15, the baffle 15 returns to its initial state. In this process, part of the garbage can be prevented from flowing through the distance between the belt filter 2 and the inclined plate 14, so that the part of the garbage cannot be discharged.

[0067] More specifically, when the suspended garbage floats to the position of the belt filter 2, the part of the garbage will contact the belt filter 2, and with the cyclic rotation of the baffle 23, the part of the garbage can be driven to move upward and gradually leave the water surface. When the baffle 23 drives the garbage to move above the water surface, the baffle 23 and part of the water carried by the garbage will flow down from the first leakage hole 24 opened on the baffle 23, thereby reducing the amount of water carried by the garbage. Since the belt filter 2 rotates slowly, more water in the garbage moved above the water surface can be made to flow down, thereby further reducing the amount of water carried by the garbage. Since the belt filter 2 circulates to bring out the garbage, it can avoid the situation where the garbage accumulated at the position of the belt filter 2 gradually increases, so that the accumulated garbage blocks the belt filter 2.

[0068] Furthermore, when the baffle 23 drives the garbage to move below the squeezing roller 3, the garbage driven by the baffle 23 is located above the supporting plate 4, and then the squeezing roller 3 will gradually fit with the garbage on the belt filter 2. During the fitting process, the garbage on the belt filter 2 will be squeezed. When the garbage is squeezed, the water carried by the garbage will be squeezed out; for example, the water remaining in the plastic bag and the water absorbed by some water-absorbing garbage can be squeezed out by the squeezing roller 3, and the water in the water-absorbing garbage can be squeezed out, thereby reducing the amount of water in the garbage. The squeezed water will flow downward through the first leakage hole 24 and along the supporting plate 4. When the garbage passes through the squeezing roller 3 and the belt filter 2 drives the garbage to rotate to the top position, the garbage will fall into the collection box, and then the belt filter 2 will continue to rotate in a cycle;

[0069] Furthermore, by setting a circulating belt filter 2, the garbage blocked at the belt filter 2 can be discharged, thereby preventing the garbage at the belt filter 2 from clogging the belt filter 2. At the same time, by setting a water control mechanism, the water in the garbage can be squeezed out, thereby reducing the amount of water in the garbage, avoiding that when garbage with excessive water content is brought into the external environment, the harmful substances present in the sewage will cause harm to the external environment. Since the water content in the garbage is reduced, the drying time of the garbage will also be reduced.

[0070] Embodiment 2: The two sides of the support plate 4 are respectively provided with slide grooves 41 on the two mounting plates 22, and the slide grooves 41 are perpendicular to the belt filter 2;

[0071] Slide blocks 42 are fixedly mounted on the two end surfaces of the support plate 4 close to the slide groove 41, and the slide blocks 42 slide in the slide groove 41;

[0072] A spring is fixedly connected to the bottom of the two sliders 42, and the other side of the spring is connected to the bottom of the slide slot 41; the support plate 4 is initially in contact with the upper belt filter 2;

[0073] In this embodiment, the support plate 4 includes a bottom plate 43 and a plurality of long blocks 44;

[0074] The slider 42 is fixedly connected to the bottom plate 43; a slideway 45 is provided on the top end surface of the bottom plate 43; uniformly arranged long blocks 44 are slidably connected in the slideway 45, and adjacent long blocks 44 fit each other;

[0075] A spring is fixedly connected to the bottom of each of the long blocks 44, and the other side of the spring is connected to the bottom of the slideway 45; a through hole is opened at the bottom of the bottom plate 43, and the through hole is used for water leakage;

[0076] In this embodiment, a top plate 33 is slidably connected in the deep groove 32 of each of the squeezing rollers 3;

[0077] Each of the top plates 33 is fixedly connected with a spring, and the other side of the spring is connected to the bottom of the deep groove 32. In the initial state, the top plate 33 is located at the notch of the deep groove 32.

[0078] Specifically, since the sliders 42 fixedly connected on both sides of the support plate 4 slide in the slide grooves 41 on the mounting plate 22 through springs, when the squeezing roller 3 squeezes the garbage above the support plate 4, the garbage above the support plate 4 is squeezed. When the garbage above the support plate 4 is squeezed to the limit position, since the squeezed garbage has a certain thickness, the garbage squeezed by the squeezing roller 3 will squeeze the belt filter 2 and the support plate 4, thereby pushing the belt filter 2 and the support plate 4 to move downward. When the support plate 4 moves downward, the support plate 4 will drive the slider 42 to slide downward in the slide groove 41, and the slider 42 will squeeze the spring. In this process, it can be avoided that when the garbage is squeezed, there is still a certain thickness of garbage, which will reversely squeeze the support plate 4 and the squeezing roller 3, so that the squeezing roller 3 or the support plate 4 is squeezed and damaged;

[0079] More specifically, since the support plate 4 is composed of a bottom plate 43 and a plurality of long blocks 44, and the long blocks 44 are all slid in the bottom plate 43 by springs, when the garbage moves onto the support plate 4, the garbage is located above the plurality of long plates at this time, and when the squeezing roller 3 squeezes the garbage, since the squeezed garbage still has a certain thickness, the garbage of this thickness will squeeze the long blocks 44 downwards, and when the long blocks 44 are squeezed downwards, they will move down into the slide 45 and compress the springs at the bottom of the long blocks 44, thereby preventing the garbage from still having a certain thickness after being squeezed, which will reversely squeeze the support plate 4 and the squeezing roller 3. At the same time, since the long blocks 44 are evenly arranged on the bottom plate 43, when the thickness of the garbage at different positions on the same side of the baffle 23 on the belt filter 2 is different, when the squeezing roller 3 squeezes the garbage , the long block 44 under the thicker garbage slides downward for a longer distance, and the long block 44 under the thinner garbage slides downward for a shorter distance. At this time, the distance that the long block 44 moves downward is determined by the thickness of the garbage. In this process, when squeezing garbage of different thicknesses on the same side of the baffle 23, the squeezing roller 3 can squeeze the garbage of different thicknesses evenly, thereby avoiding that the thicker part of the garbage cannot be squeezed completely when the squeezing roller 3 squeezes the garbage, resulting in the water in some garbage not being squeezed out. By setting a plurality of long blocks 44 sliding downward, the squeezed garbage can be made to fit with the long blocks 44 below, thereby improving the effect of dehydrating the garbage; since a through hole is provided at the bottom of the bottom plate 43, if some water enters the slide 45, it will flow out through the through hole;

[0080] Furthermore, since the top plate 33 is connected to the deep groove 32 through a spring sliding connection, when the baffle 23 extends into the deep groove 32, it will squeeze the top plate 33 in the deep groove 32, and the top plate 33 will compress the spring connected to the top plate 33. When the baffle 23 gradually moves out of the deep groove 32, the top plate 33 will gradually slide to its initial state under the push of the spring. When the baffle 23 is completely moved out of the deep groove 32, the top plate 33 returns to its initial state. During the recovery of the top plate 33, the inner wall of the deep groove 32 can be scraped, thereby preventing some garbage from entering the deep groove 32 and causing the deep groove 32 to be blocked.

[0081] Embodiment 3: The side walls of the left side of the belt filter 2 on both sides of the primary sedimentation tank 1 are provided with inclined grooves 5, and the inclined grooves 5 and the belt filter 2 are parallel to each other;

[0082] The isolation mechanism includes a floating roller 51; a rotating rod 52 is fixedly connected to the floating roller 51, and the rotating rod 52 is located in the two inclined grooves 5;

[0083] The outer ring surface of the floating roller 51 is fixedly connected with evenly arranged rotating plates 53;

[0084] In this embodiment, a slide plate 54 is slidably connected in each of the two chutes 5, and the slide plate 54 partially extends out of the chutes 5 in the initial state and extends to the top of the primary sedimentation tank 1;

[0085] The two sides of the rotating rod 52 rotate in the opposite slide plates 54 respectively; the slide plate 54 extends to one side above the primary sedimentation tank 1 and is fixedly installed with a second motor 55, and a pulley is installed on the rotating shaft of the second motor 55;

[0086] The pulley and the roller 21 are connected to a driving belt 56 for co-rotation. When the second motor 55 rotates, the driving belt 56 drives the rotating rod 52 to rotate.

[0087] In this embodiment, each of the rotating plates 53 is provided with uniformly arranged second leakage holes 57;

[0088] Specifically, when the liquid level in the initial settling tank 1 gradually rises, the floating roller 51 moves upward along the chute 5 under the action of buoyancy. Since the chute 5 and the belt filter 2 are parallel to each other, the floating roller 51 that moves upward is always parallel to the belt filter 2. When the floating roller 51 moves upward, the sliding plate 54 is driven to slide in the chute 5 through the rotating rod 52, and the top of the sliding plate 54 gradually moves out of the chute 5, and at the same time, the second motor 55 and the driving belt 56 installed on the sliding plate 54 are driven to move upward;

[0089] More specifically, when the garbage suspended in the sewage floats to the position of the floating roller 51, the floating roller 51 can block the garbage and make the garbage accumulate at the left side of the floating roller 51, thereby preventing all the floating garbage from floating to the position of the belt filter 2 at one time, preventing too much garbage from being directly taken away by the belt filter 2, making the garbage on the belt filter 2 too thick, resulting in incomplete squeezing by the squeezing roller 3, so that the water in some garbage cannot be discharged;

[0090] Furthermore, when it is necessary to discharge the garbage, the second motor 55 is controlled to rotate, and the second motor 55 drives the rotating rod 52 and the floating roller 51 to rotate slowly clockwise through the driving belt 56. During the rotation of the floating roller 51, the floating roller 51 drives the uniformly arranged rotating plate 53 to rotate. When the rotating plate 53 rotates, it will bring up part of the garbage accumulated on the left side of the floating roller 51, and gradually follow the rotating plate 53 to rotate clockwise. When the rotating plate 53 drives the garbage to rotate upward, this part of the garbage is located above the liquid surface, and the excess water in this part of the garbage will flow down from the second leakage hole 57, thereby reducing the amount of water carried by the garbage. When the rotating plate 53 drives the garbage to rotate to the lower right position, this part of the garbage will fall on the passing belt filter 2, and then be driven by the belt filter 2 to the position of the squeezing roller 3 for squeezing;

[0091] By setting a floating roller 51, its position can be automatically adjusted according to the height of the liquid level, and the garbage can be blocked at the same time. Each time the rotating plate 53 rotates, a part of the garbage can be taken away, so that the garbage can be transferred to the belt filter 2 in batches, and then squeezed by the squeezing roller 3 in batches, so as to avoid all the floating garbage floating to the position of the belt filter 2 at one time, thereby avoiding too much garbage being directly taken away by the belt filter 2, making the garbage on the belt filter 2 too thick, resulting in incomplete squeezing by the squeezing roller 3, so that the moisture in some garbage cannot be discharged.

[0092] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0093] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A municipal wastewater pretreatment device, comprising a primary sedimentation tank (1); characterized in that: A water inlet (11) is provided on the left end surface of the primary sedimentation tank (1); a water outlet (12) is provided on the right end surface of the primary sedimentation tank (1); A collecting bin (13) is fixedly installed above the water outlet (12); a separation mechanism is provided on the left side of the water outlet (12); the separation mechanism comprises a belt filter (2); the belt filter (2) rotates on two rollers (21); The roller (21) located at the bottom rotates in the primary sedimentation tank (1); mounting plates (22) are provided on both sides of the roller (21) located at the top, and the mounting plates (22) are mounted on the primary sedimentation tank (1), and the roller (21) at the top rotates on the two mounting plates (22); The belt filter (2) is fixedly connected to evenly arranged baffles (23), and evenly arranged first leakage holes (24) are provided on the baffles (23); A water control mechanism is provided between the two mounting plates (22), and the water control mechanism is used to control the garbage in the water; A sloping plate (14) is provided on the left side of the rotating roller (21) at the bottom, and a curved surface is provided on the side of the sloping plate (14) close to the belt filter (2), and the rotating baffle (23) passes through the curved surface; A baffle (15) is rotatably mounted on one side of the inclined plate (14) close to the rotating roller (21) via a torsion spring, and the other side of the baffle (15) is in contact with the belt filter (2); An isolation mechanism is provided above the rotating roller (21) at the bottom, and the isolation mechanism is used to isolate garbage floating on the water.

2. A municipal wastewater pretreatment device according to claim 1, characterized in that: The water control mechanism comprises a squeezing roller (3); the squeezing roller (3) rotates between two mounting plates (22); A first motor (31) is fixedly mounted on one of the mounting plates (22), and the first motor (31) is used to drive the squeezing roller (3) to rotate counterclockwise; The outer ring surface of the squeezing roller (3) is provided with evenly arranged deep grooves (32), and the deep grooves (32) are meshed with the baffles (23) on the belt filter (2); the openings of the deep grooves (32) are all provided with rounded corners; In the initial state, one of the baffles (23) extends into one of the deep grooves (32), and when the squeezing roller (3) rotates, the deep grooves (32) on the squeezing roller (3) will mesh with the baffle (23) in sequence; A support plate (4) is provided in the belt filter (2) below the squeezing roller (3), and the support plate (4) is parallel to the belt filter (2); both sides of the support plate (4) are mounted on a mounting plate (22).

3. A municipal wastewater pretreatment device according to claim 2, characterized in that: The support plate (4) is provided with slide grooves (41) on two mounting plates (22) on both sides, and the slide grooves (41) and the belt filter (2) are perpendicular to each other; Slide blocks (42) are fixedly mounted on the two end surfaces of the support plate (4) close to the slide groove (41), and the slide blocks (42) slide in the slide groove (41); A spring is fixedly connected to the bottom of each of the two sliding blocks (42), and the other side of the spring is connected to the bottom of the slide groove (41); in the initial state, the support plate (4) is in contact with the upper belt filter (2).

4. A municipal wastewater pretreatment device according to claim 3, characterized in that: The support plate (4) comprises a bottom plate (43) and a plurality of long blocks (44); The slider (42) is fixedly connected to the bottom plate (43); a slideway (45) is provided on the top end surface of the bottom plate (43); uniformly arranged long blocks (44) are slidably connected in the slideway (45), and adjacent long blocks (44) are fitted to each other; A spring is fixedly connected to the bottom of each long block (44), and the other side of the spring is connected to the bottom of the slideway (45); a through hole is opened at the bottom of the bottom plate (43), and the through hole is used for water leakage.

5. A municipal wastewater pretreatment device according to claim 4, characterized in that: A top plate (33) is slidably connected in the deep groove (32) of each squeezing roller (3); A spring is fixedly connected to each of the top plates (33), and the other side of the spring is connected to the bottom of the deep groove (32). In an initial state, the top plate (33) is located at the notch of the deep groove (32).

6. A municipal wastewater pretreatment device according to claim 5, characterized in that: The side walls of the belt filter (2) on both sides of the primary sedimentation tank (1) are provided with inclined grooves (5), and the inclined grooves (5) and the belt filter (2) are parallel to each other; The isolation mechanism comprises a floating roller (51); a rotating rod (52) is fixedly connected to the floating roller (51), and the rotating rod (52) is located in two inclined grooves (5); The outer ring surface of the floating roller (51) is fixedly connected with evenly arranged rotating plates (53).

7. A municipal wastewater pretreatment device according to claim 6, characterized in that: The two chute grooves (5) are both slidably connected with a slide plate (54), and in the initial state, the slide plate (54) partially extends out of the chute groove (5) and extends to the top of the primary sedimentation tank (1); The two sides of the rotating rod (52) are respectively rotated in the opposite slide plates (54); a second motor (55) is fixedly installed on one side of the slide plate (54) extending above the primary sedimentation tank (1), and a pulley is installed on the rotating shaft of the second motor (55); The belt wheel and the rotating roller (21) are connected with a driving belt (56) for co-rotation. When the second motor (55) rotates, the driving belt (56) drives the rotating rod (52) to rotate.

8. A municipal wastewater pretreatment device according to claim 7, characterized in that: Each of the rotating plates (53) is provided with evenly arranged second leakage holes (57).

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