Sewage treatment device for construction site

Abstract

The invention discloses a construction site sewage treatment device, which relates to the technical field of sewage treatment, and comprises a treatment box and a water inlet pipe arranged at the top of the treatment box, the filtering assembly is arranged in the treatment box and used for filtering the building sewage, the treatment assembly is arranged in the treatment box and used for conducting chemical treatment on the filtered building sewage, and the filtering assembly comprises a first rotating rod, a second rotating rod and a third rotating rod which are rotationally connected to the treatment box; and a filter belt is arranged among the first rotating roller, the second rotating roller and the third rotating roller in a sleeving manner. According to the construction site sewage treatment device disclosed by the invention, through the arrangement of the filtering assembly, impurities such as silt, stones and cement particles filtered out from construction sewage are separated while the construction sewage is filtered, so that the probability that a filtering belt is blocked by the impurities is reduced, and the construction site sewage treatment efficiency is improved. And the labor cost for cleaning the filter belt and the shutdown frequency and duration of equipment are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device for a construction site. Background Art

[0002] During the construction process, a large amount of sewage is generated not only in the construction links such as concrete mixing, curing, and mortar preparation, but also because construction sites are usually open-air operations, there are a large number of loose materials and construction waste on the site. When it rains, rainwater will wash the ground, carrying impurities such as mud, gravel, and cement particles into the drainage system, forming sewage.

[0003] When treating sewage from construction sites, since sewage often contains a large amount of mud, gravel, cement particles and other debris, the first step in sewage treatment is to filter the sewage. The traditional filtering method mainly uses filter plates for filtering. Although the filtering effect of construction sewage can be achieved, during the filtering process, it is necessary to regularly remove the debris on the filter plate to reduce the chance of the filter plate being blocked by debris. In the process of cleaning the debris on the filter plate, not only a lot of manpower is required to increase labor costs, but also frequent cleaning increases the number and duration of equipment downtime, resulting in a reduction in sewage treatment volume, which in turn affects the overall treatment efficiency. For this reason, we propose a construction site sewage treatment device. Summary of the invention

[0004] The object of the present invention is to provide a construction site sewage treatment device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solutions: a construction site sewage treatment device, comprising a treatment box and a water inlet pipe arranged on the top of the treatment box, a water outlet pipe is arranged on one side of the treatment box close to the bottom, and further comprising a filter assembly arranged in the treatment box for filtering the construction sewage and a treatment assembly arranged in the treatment box for performing drug treatment on the filtered construction sewage;

[0006] The filter assembly includes two first rotating rods, a second rotating rod and a third rotating rod rotatably connected to the processing box, the two first rotating rods are horizontally arranged and located on both sides of the two water inlet pipes, the second rotating rod is located inside the processing box, the third rotating rod is located outside the processing box, and the second rotating rod and the third rotating rod are located above the two first rotating rods, the side walls of the two first rotating rods, the second rotating rod and the third rotating rod are respectively provided with a first rotating roller, a second rotating roller and a third rotating roller, a filter belt is sleeved between the two first rotating rollers, the second rotating roller and the third rotating roller, and the processing box is provided with a supporting assembly for supporting the filter belt and a cleaning assembly for cleaning the filter belt.

[0007] Preferably, the side wall of the filter belt is provided with a plurality of strip plates, and the strip plates are arranged at equal distances.

[0008] Preferably, a first fixing plate is fixedly connected to a side of the processing box close to the third rotating rod, a first motor is provided on a side of the first fixing plate away from the filter belt, and an output end of the first motor is connected to the third rotating rod.

[0009] Preferably, the support assembly includes a support rod rotatably connected to two opposite inner walls of the processing box, the two support rods are located on both sides of the water inlet pipe, two support rollers are fixedly connected to the side walls of the two support rods, two opposite side walls of the filter belt are fixedly connected with retaining rings, the two retaining rings are fixedly connected to the sides away from each other with support rings, and the two support rollers located on the same side are arranged against the side walls of the support rings.

[0010] Preferably, the treatment box is provided with a drainage component for draining filtered construction sewage, the drainage component includes two mounting plates fixedly connected to the treatment box, the two mounting plates are fixedly connected with drainage plates on one side close to the filter belt, the drainage plates are arranged to match the shape of the filter belt, and avoidance holes are provided on the side close to the two third rotating rollers, the drainage plate is provided with a drainage groove on the side close to the filter belt, and the drainage groove is sealed on the side close to the two mounting plates.

[0011] Preferably, the water inlet pipe is provided with a buffer assembly for buffering building sewage, the buffer assembly includes a plurality of buffer rods rotatably connected between two opposite inner walls of the water inlet pipe, each of the buffer rods is fixedly connected to a buffer roller on its side wall, one end of each of the buffer rods passes through the water inlet pipe, and two adjacent ones are connected by a transmission belt, and each of the buffer rods close to the support rod is also connected by a transmission belt.

[0012] Preferably, the cleaning component is fixedly connected to two symmetrically arranged second fixed plates on one side of the processing box close to the first fixed plate, the two second fixed plates are located on both sides of the filter belt, and the third rotating rod is rotatably connected to the two second fixed plates, the two second fixed plates are connected to a sliding plate on one side close to the water outlet pipe through a telescopic component, a connecting plate is fixedly connected between the two sliding plates, a plurality of cleaning rods are fixedly connected to the connecting plate on one side close to the filter belt, and the third rotating rod is provided with a driving component for driving each cleaning rod.

[0013] Preferably, the driving assembly includes two cams fixedly connected to the side wall of the third rotating rod and arranged symmetrically with each other, and the two sliding plates are fixedly connected to the driving plate on one side close to the cams, and the two cams are slidably connected to the driving plate.

[0014] Preferably, the telescopic assembly includes a T-bar fixedly connected to the second fixed plate near the connecting plate, the side wall of the T-bar is slidably connected with a telescopic plate, one end of the telescopic plate is connected to the sliding plate, and the side wall of the T-bar is sleeved with a spring, and the two ends of the spring are respectively connected to the second fixed plate and the telescopic plate.

[0015] Preferably, the processing assembly includes a processing rod rotatably connected between two opposite inner walls of the processing box, the side wall of the processing rod is fixedly connected to a stirring blade, the side wall of the processing box is fixedly connected to a second motor, the output end of the second motor is connected to the processing rod, and the side wall of the processing box is fixedly connected to a dosing tube.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The construction site sewage treatment device of the present invention, through the setting of the filtering component, under the action of the supporting component and the cleaning component, can filter the construction sewage and separate the mud, gravel, cement particles and other debris filtered out from the construction sewage, thereby reducing the probability of the filter belt being blocked by debris and reducing the labor cost of cleaning the filter belt and the number and duration of equipment downtime, thereby improving the efficiency of construction sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the internal structure of the processing box of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the filter assembly of the present invention;

[0021] Figure 4 This is a schematic diagram of the support assembly structure of the present invention;

[0022] Figure 5 This is a schematic diagram of the position structure of the drainage component and the filter belt of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of the buffer assembly of the present invention;

[0024] Figure 7 It is a schematic diagram of the shape of the filter belt of the present invention;

[0025] Figure 8 This is a schematic diagram of the drainage assembly structure of the present invention;

[0026] Fig. 9 This is a schematic diagram of the cleaning component structure of the present invention;

[0027] Fig.10 for Fig. 9Enlarged view of point A in the middle.

[0028] In the figure: 101, treatment box; 102, water inlet pipe; 103, water outlet pipe; 201, first rotating rod; 202, second rotating rod; 203, third rotating rod; 204, first rotating roller; 205, second rotating roller; 206, third rotating roller; 207, filter belt; 208, first fixing plate; 209, first motor; 211, strip plate; 301, support rod; 302, support roller; 303, retaining ring; 304, support ring; 401, Mounting plate; 402, drainage plate; 403, drainage groove; 404, avoidance hole; 501, buffer rod; 502, buffer roller; 503, transmission belt; 601, second fixed plate; 602, sliding plate; 603, connecting plate; 604, cleaning rod; 701, cam; 702, driving plate; 801, telescopic plate; 802, T-bar; 803, spring; 901, processing rod; 902, stirring blade; 903, second motor; 904, dosing tube. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-Figure 10 , a construction site sewage treatment device shown in the figure includes a treatment box 101 and a water inlet pipe 102 arranged on the top of the treatment box 101, a water outlet pipe 103 is arranged on one side of the treatment box 101 near the bottom, and also includes a filtering component arranged in the treatment box 101 for filtering the construction sewage and a treatment component arranged in the treatment box 101 for performing drug treatment on the filtered construction sewage;

[0032] The filter assembly includes two first rotating rods 201, a second rotating rod 202 and a third rotating rod 203 which are rotatably connected to the processing box 101. The two first rotating rods 201 are horizontally arranged and located on both sides of the two water inlet pipes 102. The second rotating rod 202 is located inside the processing box 101. The third rotating rod 203 is located outside the processing box 101. The second rotating rod 202 and the third rotating rod 203 are located above the two first rotating rods 201. The side walls of the two first rotating rods 201, the second rotating rod 202 and the third rotating rod 203 are respectively provided with a first rotating roller 204, a second rotating roller 205 and a third rotating roller 206. A filter belt 207 is sleeved between the two first rotating rollers 204, the second rotating roller 205 and the third rotating roller 206. The processing box 101 is provided with a supporting assembly for supporting the filter belt 207 and a cleaning assembly for cleaning the filter belt 207.

[0033] It should be noted here that: through the setting of the filtering component, under the action of the supporting component and the cleaning component, while the construction sewage is filtered, the mud, gravel, cement particles and other debris filtered out from the construction sewage are separated, thereby reducing the probability of the filter belt 207 being blocked by debris, while reducing the labor cost of cleaning the filter belt 207 and the number and duration of equipment downtime, thereby improving the efficiency of construction sewage treatment.

[0034] See also Figure 7 , the side wall of the filter belt 207 shown in the figure is provided with a plurality of strip plates 211, and each strip plate 211 is arranged at equal distances;

[0035] It should be noted here that by providing a plurality of equidistant strip plates 211 on the surface of the filter belt 207 , the blocking effect of the strip plates 211 can be utilized to remove debris such as mud, gravel, cement particles, etc. retained on the surface of the filter belt 207 from the inside of the treatment box 101 .

[0036] See also Figure 3 In the figure, a first fixing plate 208 is fixedly connected to a side of the processing box 101 close to the third rotating rod 203, and a first motor 209 is provided on a side of the first fixing plate 208 away from the filter belt 207, and an output end of the first motor 209 is connected to the third rotating rod 203;

[0037] It should be noted here that: by setting the first motor 209, it is convenient to drive the filter belt 207 to rotate, and then it is convenient to remove the debris such as mud, gravel, cement particles, etc. retained on the surface of the filter belt 207 from the inside of the processing box 101.

[0038] See also Figure 3 and Figure 4The supporting assembly shown in the figure includes a supporting rod 301 rotatably connected to two opposite inner walls of the processing box 101, the two supporting rods 301 are located on both sides of the water inlet pipe 102, two supporting rollers 302 are fixedly connected to the side walls of the two supporting rods 301, a retaining ring 303 is fixedly connected to the two opposite side walls of the filter belt 207, a supporting ring 304 is fixedly connected to the side away from the two retaining rings 303, and the two supporting rollers 302 located on the same side are arranged against the side wall of the supporting ring 304;

[0039] It should be noted here that: through the arrangement of the supporting assembly, the filter belt 207 is made to be U-shaped as a whole, so as to facilitate the flow filtration of construction sewage from a fixed area.

[0040] See also Figure 5 and Figure 8 The treatment box 101 shown in the figure is provided with a drainage assembly for draining the filtered building sewage, and the drainage assembly includes two mounting plates 401 fixedly connected to the treatment box 101, and a drainage plate 402 is fixedly connected to one side of the two mounting plates 401 close to the filter belt 207, and the drainage plate 402 is matched with the shape of the filter belt 207, and a avoidance hole 404 is provided on the side close to the two third rotating rollers 206, and a drainage groove 403 is provided on the side of the drainage plate 402 close to the filter belt 207, and the drainage groove 403 is sealed on the side close to the two mounting plates 401;

[0041] It should be noted here that: through the setting of the drainage component, during the process of treating construction sewage, the filter belt 207 is supported and tightened by the support rollers 302 on the two support rods 301, so that the filter belt 207 is U-shaped as a whole, and under the drainage action of the drainage groove 403 on the drainage plate 402, the filtered sewage flows from a single direction to the treatment box 101, and will not pass through the filter belt 207 for a second time, thereby reducing excessive scouring of the filter belt 207.

[0042] See also Figure 6 The water inlet pipe 102 shown in the figure is provided with a buffer assembly for buffering building sewage, and the buffer assembly includes a plurality of buffer rods 501 rotatably connected between two opposite inner walls of the water inlet pipe 102, and a buffer roller 502 is fixedly connected to the side wall of each buffer rod 501, and one end of each buffer rod 501 is arranged to penetrate the water inlet pipe 102, and two adjacent ones are connected by a transmission belt 503, and one of each buffer rod 501 close to the support rod 301 is also connected by a transmission belt 503;

[0043] It should be noted here that: through the setting of the buffer component, during the rotation of the filter belt 207, the support ring 304 on one side of the retaining ring 303 will be synchronously driven to rotate, and then the support rod 301 will be driven to rotate, and then the transmission belt 503 will be used to drive the buffer rollers 502 on each buffer rod 501 to rotate, so that the rotation of the buffer rollers 502 is used to buffer the potential energy of the construction sewage flowing to the filter belt 207, thereby reducing the impact force on the filter belt 207, and then reducing the damage to the filter belt 207 and the risk of construction sewage splashing everywhere.

[0044] See also Fig. 9 and Fig.10 The cleaning assembly shown in the figure is fixedly connected to two second fixed plates 601 symmetrically arranged on one side of the processing box 101 close to the first fixed plate 208, the two second fixed plates 601 are located on both sides of the filter belt 207, and the third rotating rod 203 is rotatably connected to the two second fixed plates 601, the two second fixed plates 601 are connected to a sliding plate 602 on one side close to the water outlet pipe 103 through a telescopic assembly, a connecting plate 603 is fixedly connected between the two sliding plates 602, and a plurality of cleaning rods 604 are fixedly connected to one side of the connecting plate 603 close to the filter belt 207, and the third rotating rod 203 is provided with a driving assembly for driving each cleaning rod 604;

[0045] It should be noted here that: through the setting of the cleaning component, under the mutual cooperation of the driving component and the telescopic component, the filter belt 207 is subjected to force vibration, and under the action of the vibration, the impurities adhering to the surface of the filter belt 207 are shaken off, thereby reducing the probability of the filter belt 207 being blocked and improving the surface cleanliness of the filter belt 207.

[0046] See also Fig. 9 and Fig.10 The driving assembly shown in the figure includes two symmetrically arranged cams 701 fixedly connected to the side wall of the third rotating rod 203, and the driving plate 702 is fixedly connected to the side of the two sliding plates 602 close to the cams 701, and the two cams 701 are slidably connected to the driving plate 702;

[0047] It should be noted here that: through the setting of the driving component, when the first motor 209 drives the third rotating rod 203 to rotate, the two cams 701 will be driven to rotate synchronously, and then in the process of the two cams 701 rotating, the driving plate 702 at one end of the two sliding plates 602 will be reciprocatingly squeezed, so that under the driving force and the elastic reset action of the telescopic component, the various cleaning rods 604 on the connecting plate 603 are driven to reciprocate and collide with the surface of the filter belt 207.

[0048] See also Fig. 9 and Fig.10The telescopic assembly shown in the figure includes a T-shaped rod 802 fixedly connected to the second fixed plate 601 near the connecting plate 603, the side wall of the T-shaped rod 802 is slidably connected with the telescopic plate 801, one end of the telescopic plate 801 is connected to the sliding plate 602, and the side wall of the T-shaped rod 802 is sleeved with a spring 803, and the two ends of the spring 803 are respectively connected to the second fixed plate 601 and the telescopic plate 801;

[0049] It should be noted here that the telescopic assembly is provided to provide guidance and reset functions for the movement of the connecting plate 603 .

[0050] See also Figure 2 The processing assembly shown in the figure includes a processing rod 901 rotatably connected between two inner walls of the processing box 101, a stirring blade 902 is fixedly connected to the side wall of the processing rod 901, a second motor 903 is fixedly connected to the side wall of the processing box 101, an output end of the second motor 903 is connected to the processing rod 901, and a dosing pipe 904 is fixedly connected to the side wall of the processing box 101;

[0051] It should be noted here that the treatment effect of building sewage is improved by setting up the treatment components.

[0052] In this scheme: a construction site sewage treatment device comprises the following steps:

[0053] When treating construction sewage, the construction sewage is first injected into the treatment box 101 from the water inlet pipe 102 by a high-pressure pump. After the construction sewage is injected into the treatment box 101, it will flow to the filter belt 207 under the drainage effect of the water inlet pipe 102, and then the construction sewage is filtered under the filtering effect of the filter belt 207.

[0054] In the process of filtering construction sewage by the filter belt 207, debris such as mud, gravel, cement particles, etc. in the construction sewage will be retained on the surface of the filter belt 207. At this time, by starting the first motor 209, the third rotating rod 203 is driven to rotate, and then the filter belt 207 is driven to rotate. In the process of the rotation of the filter belt 207, the mud, gravel, cement particles, etc. retained on the surface of the filter belt 207 are removed from the inside of the treatment box 101 by the blocking effect of the strip plate 211 on the surface of the filter belt 207, thereby achieving the separation of mud, gravel, cement particles, etc. filtered from the construction sewage while filtering the construction sewage, thereby reducing the probability of the filter belt 207 being blocked by debris, reducing the labor cost of cleaning the filter belt 207 and the number and duration of equipment downtime, thereby improving the efficiency of construction sewage treatment;

[0055] In the process of treating building sewage, the filter belt 207 is supported and pressed by the support rollers 302 on the two support rods 301, so that the filter belt 207 is U-shaped as a whole, and the drainage groove 403 on the drainage plate 402 makes the filtered sewage flow into the treatment box 101 from a single direction, and will not pass through the filter belt 207 twice, thereby reducing excessive scouring of the filter belt 207;

[0056] At the same time, during the rotation of the filter belt 207, the support ring 304 on one side of the retaining ring 303 will be synchronously driven to rotate, thereby driving the support rod 301 to rotate, and then using the transmission belt 503 to drive the buffer rollers 502 on each buffer rod 501 to rotate, so that the rotation of the buffer rollers 502 can be used to buffer the potential energy of the construction sewage flowing to the filter belt 207, thereby reducing the impact force on the filter belt 207, thereby reducing the damage to the filter belt 207 and the risk of splashing the construction sewage;

[0057] At the same time, when the first motor 209 drives the third rotating rod 203 to rotate, the two cams 701 will be driven to rotate synchronously, and then, when the two cams 701 rotate, the driving plate 702 at one end of the two sliding plates 602 will be reciprocatingly squeezed, so that under the driving force and the elastic reset action of the telescopic component, the cleaning rods 604 on the connecting plate 603 are driven to reciprocate and collide with the surface of the filter belt 207, so that the filter belt 207 is vibrated by force, and then, under the action of vibration, the impurities adhering to the surface of the filter belt 207 are shaken off, thereby reducing the probability of the filter belt 207 being blocked and improving the surface cleanliness of the filter belt 207.

[0058] After the construction sewage is filtered, it will be deposited at the bottom of the treatment box 101. At this time, the reaction agent used for sewage treatment is added into the treatment box 101 through the dosing pipe 904, and the second motor 903 is used to drive the stirring blade 902 on the treatment rod 901 to rotate, so that the reaction agent and the construction sewage are fully mixed, thereby improving the treatment effect of the construction sewage. The treated construction sewage can be discharged from the outlet pipe 103 to the designated area.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A construction site sewage treatment device, comprising: A treatment box (101) and a water inlet pipe (102) arranged at the top of the treatment box (101), wherein a water outlet pipe (103) is arranged on one side of the treatment box (101) close to the bottom; It is characterized by further comprising: A filtering component disposed in the treatment box (101) for filtering building sewage; A processing component disposed in the processing box (101) for performing a drug treatment on the filtered building sewage; The filter assembly comprises two first rotating rods (201), a second rotating rod (202) and a third rotating rod (203) which are rotatably connected to the treatment box (101); the two first rotating rods (201) are arranged horizontally and are located on both sides of the two water inlet pipes (102); the second rotating rod (202) is located inside the treatment box (101); the third rotating rod (203) is located outside the treatment box (101); and the second rotating rod (202) and the third rotating rod (203) are located above the two first rotating rods (201). The first rotating rod (201), the second rotating rod (202) and the third rotating rod (203) are provided with a first rotating roller (204), a second rotating roller (205) and a third rotating roller (206) on their side walls respectively; a filter belt (207) is sleeved between the first rotating rollers (204), the second rotating rollers (205) and the third rotating rollers (206); and the processing box (101) is provided with a supporting component for supporting the filter belt (207) and a cleaning component for cleaning the filter belt (207).

2. A construction site sewage treatment device according to claim 1, characterized in that: The side wall of the filter belt (207) is provided with a plurality of strip plates (211), and each of the strip plates (211) is arranged at equal distances.

3. A construction site sewage treatment device according to claim 2, characterized in that: A first fixed plate (208) is fixedly connected to one side of the processing box (101) close to the third rotating rod (203), and a first motor (209) is provided on the side of the first fixed plate (208) away from the filter belt (207), and an output end of the first motor (209) is connected to the third rotating rod (203).

4. A construction site sewage treatment device according to claim 3, characterized in that: The support assembly comprises a support rod (301) rotatably connected to two opposite inner walls of the treatment box (101); the two support rods (301) are located on both sides of the water inlet pipe (102); two support rollers (302) are fixedly connected to the side walls of the two support rods (301); two opposite side walls of the filter belt (207) are fixedly connected to retaining rings (303); a support ring (304) is fixedly connected to the side of the two retaining rings (303) that are away from each other; and the two support rollers (302) located on the same side are arranged to abut against the side walls of the support ring (304).

5. A construction site sewage treatment device according to claim 4, characterized in that: The treatment box (101) is provided with a drainage component for draining filtered building sewage, the drainage component comprising two mounting plates (401) fixedly connected to the treatment box (101), a drainage plate (402) being fixedly connected to one side of the two mounting plates (401) close to the filter belt (207), the drainage plate (402) being arranged to match the shape of the filter belt (207), and a avoidance hole (404) being provided on one side close to the two third rotating rollers (206), a drainage groove (403) being provided on one side of the drainage plate (402) close to the filter belt (207), and a sealing arrangement being provided on one side of the drainage groove (403) close to the two mounting plates (401).

6. A construction site sewage treatment device according to claim 5, characterized in that: The water inlet pipe (102) is provided with a buffer assembly for buffering building sewage, the buffer assembly comprising a plurality of buffer rods (501) rotatably connected between two opposite inner walls of the water inlet pipe (102), a buffer roller (502) being fixedly connected to the side wall of each buffer rod (501), one end of each buffer rod (501) passing through the water inlet pipe (102), and two adjacent buffer rods are connected by a transmission belt (503), and one of each buffer rod (501) close to the support rod (301) is also connected by a transmission belt (503).

7. A construction site sewage treatment device according to claim 6, characterized in that: The cleaning assembly is fixedly connected to two second fixed plates (601) symmetrically arranged on one side of the processing box (101) close to the first fixed plate (208); the two second fixed plates (601) are located on both sides of the filter belt (207); and the third rotating rod (203) is rotatably connected to the two second fixed plates (601); the two second fixed plates (601) are connected to a sliding plate (602) on one side close to the water outlet pipe (103) through a telescopic assembly; a connecting plate (603) is fixedly connected between the two sliding plates (602); a plurality of cleaning rods (604) are fixedly connected to one side of the connecting plate (603) close to the filter belt (207); and the third rotating rod (203) is provided with a driving assembly for driving each cleaning rod (604).

8. A construction site sewage treatment device according to claim 7, characterized in that: The driving assembly comprises two symmetrically arranged cams (701) fixedly connected to the side wall of the third rotating rod (203); a driving plate (702) is fixedly connected to one side of the two sliding plates (602) close to the cams (701); and the two cams (701) are slidably connected to the driving plate (702).

9. A construction site sewage treatment device according to claim 8, characterized in that: The telescopic assembly comprises a T-shaped rod (802) fixedly connected to a side of the second fixed plate (601) close to the connecting plate (603); the side wall of the T-shaped rod (802) is slidably connected to the telescopic plate (801); one end of the telescopic plate (801) is connected to the sliding plate (602); the side wall of the T-shaped rod (802) is sleeved with a spring (803); the two ends of the spring (803) are respectively connected to the second fixed plate (601) and the telescopic plate (801).

10. A construction site sewage treatment device according to claim 9, characterized in that: The processing assembly comprises a processing rod (901) rotatably connected between two inner walls of a processing box (101), a stirring blade (902) is fixedly connected to the side wall of the processing rod (901), a second motor (903) is fixedly connected to the side wall of the processing box (101), an output end of the second motor (903) is connected to the processing rod (901), and a dosing pipe (904) is fixedly connected to the side wall of the processing box (101).

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