A screening device for sludge treatment

Abstract

The present invention relates to a screening device for sludge treatment, comprising a box body, a driving mechanism arranged on the box body, a mobile box movably arranged in the box body, a screening net arranged on the mobile box, a connecting mechanism arranged between the driving mechanism and the mobile box, a vibrating mechanism arranged on the screening net, a loading hopper arranged on the box body, a circulating crushing mechanism arranged on the box body, a discharge pipe fixedly arranged on the mobile box at one end and penetrating the other end movably arranged on the box body, and a first valve arranged on the discharge pipe. The powder screening net in the present invention can both reciprocate and vibrate up and down, so that the sludge is not easy to accumulate on the screening net, which is convenient for subsequent sludge screening, and large-particle sludge can be screened for multiple cycles, which greatly improves the qualified rate and processing efficiency of the sludge; the cooperation of multiple gears in the barrel driving mechanism and the arrangement of two conveyor belts make the reciprocating movement of the mobile frame and the powder screening net stable, which not only improves the stability of the entire device, but also increases the service life of the entire device.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, and in particular to a screening device for sludge treatment. Background Art

[0002] Sludge is the sediment discharged from sewage treatment facilities. It is easy to rot and stink, has fine particles, small specific gravity, high water content and is not easy to dehydrate. It is a hydrophilic substance with a colloidal structure. It is a thick substance between liquid and solid, which can be transported by pumps, but it is difficult to separate solids and liquids through sedimentation.

[0003] Sludge screening is an important part of the sludge treatment process, and sludge treatment has particle size requirements. Only sludge that meets the particle size requirements can proceed to the next step of sludge treatment. However, the existing sludge screening device still has the following problems when screening sludge: First, a reciprocating screen is usually used to screen the sludge, but the reciprocating screen has poor vibration effect. After a long period of sludge screening, the sludge will still accumulate on the screen, affecting the sludge screening efficiency; second, a cylinder is often used to realize the reciprocating movement of the screen, and the screen will also generate vibration force during the reciprocating movement. Combined with the principle of action and reaction force, the vibration force will act on the cylinder, making the cylinder unstable and easy to be damaged after long-term use. Summary of the invention

[0004] In view of the problems in the prior art, the present invention provides a screening device for sludge treatment.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a screening device for sludge treatment, comprising a box body, a driving mechanism arranged on the box body, a mobile box movably arranged in the box body, a screening net arranged on the mobile box, a connecting mechanism arranged between the driving mechanism and the mobile box, a vibrating mechanism arranged on the screening net, a hopper arranged on the box body, a circulating crushing mechanism arranged on the box body, a discharge pipe with one end fixed on the mobile box and the other end passing through the movably arranged on the box body, and a first valve arranged on the discharge pipe; the vibrating mechanism comprises a first guide plate and a second guide plate fixedly arranged in the box body, a first chute and a second chute arranged on the mobile box, a first spring and a second spring with one end fixedly arranged on the mobile box and the other end fixedly arranged on the screening net, a first spring and a second spring with one end fixedly arranged on the mobile box and the other end fixedly arranged on the screening net, and a first spring and a second spring with one end fixedly arranged on the mobile box and the other end fixedly arranged on the screening net. A third spring and a fourth spring fixed on the screening net, a first upper sealing plate and a first lower sealing plate fixed on the screening net, a second upper sealing plate and a second lower sealing plate fixed on the screening net, and a round rod passing through and fixed on the screening net; one end of the screening net can be slidably arranged on the first slide groove, and the other end of the screening net can be slidably arranged on the second slide groove; the driving mechanism includes a moving frame, a support plate fixed on the box body, a first base fixed on the support plate, a frame fixed on the support plate, a first shaft body and a second shaft body passing through and rotatably arranged on the frame body, a first motor arranged on the first base and used to drive the first shaft body to rotate, a first gear and a second gear fixedly mounted on the first shaft body, and a third gear and a fourth gear fixedly mounted on the second shaft body.

[0006] Specifically, the first guide plate and the second guide plate have the same structure; the first guide plate includes a main body, a plurality of arc grooves equidistantly arranged on the main body, and a plurality of arc protrusions equidistantly arranged and fixed on the main body.

[0007] Specifically, the plurality of arc-shaped grooves and the plurality of arc-shaped protrusions are arranged in a staggered manner.

[0008] Specifically, the driving mechanism also includes a third shaft body that passes through and is rotatably arranged on the frame, a fifth gear that is fixedly mounted on the third shaft body, a fourth shaft body that passes through and is rotatably arranged on the frame, a sixth gear that is fixedly mounted on the fourth shaft body, a first connecting rod whose one end is fixedly mounted on the third shaft body, a first short shaft that passes through and is rotatably arranged on the first connecting rod, a second connecting rod whose one end is fixedly mounted on the first short shaft and is rotatably arranged on the movable frame at the other end, a first external gear that is fixedly mounted on the first short shaft, a second external gear that is fixedly mounted on the frame, a first conveyor belt whose one end is wound around the first external gear and the other end is wound around the second external gear, a third connecting rod whose one end is fixedly mounted on the fourth shaft body, a second short shaft that passes through and is rotatably arranged on the third connecting rod, a fourth connecting rod whose one end is fixedly mounted on the second short shaft and the other end is rotatably arranged on the movable frame, a third external gear that is fixedly mounted on the second short shaft, a fourth external gear that is fixedly mounted on the frame, and a second conveyor belt whose one end is wound around the third external gear and the other end is wound around the fourth external gear.

[0009] Specifically, the first gear is meshed with the third gear, the fourth gear is meshed with the fifth gear, and the second gear is meshed with the sixth gear.

[0010] Specifically, the connecting mechanism includes a third slide groove arranged on the box body, a connecting rod with one end fixed on the mobile frame and the other end fixed on the mobile box, and a large sealing plate fixedly sleeved on the connecting rod; the connecting rod can be slidably arranged on the third slide groove.

[0011] Specifically, the circulating crushing mechanism includes a crushing box fixed on the box body, a support rod fixed on the box body, a first suction pump arranged on the support rod, a first tube body and a second tube body arranged on the first suction pump, a third tube body having one end fixed on the movable box and the other end passing through a movably arranged on the first tube body, a second valve arranged on the second tube body, a third valve arranged on the third tube body, a second base fixed on the crushing box, a rotating shaft passing through and rotatably arranged on the crushing box, a plurality of cutting knives fixed on the rotating shaft, a second motor arranged on the second base and used to drive the rotating shaft to rotate, a second suction pump arranged on the crushing box, a fourth tube body having one end arranged on the suction pump and the other end connected to the crushing box, a fifth tube body having one end arranged on the second suction pump and the other end connected to the upper hopper, a fourth valve arranged on the fourth tube body, and a fifth valve arranged on the fifth tube body.

[0012] The beneficial effects of the present invention are:

[0013] When in use, the sludge is put into the upper hopper, and then the sludge falls onto the screening net, and the first motor is turned on at the same time. The first motor drives the driving mechanism to work, and the driving mechanism makes the third shaft and the fourth shaft rotate simultaneously when working, and through the cooperation between multiple gears and the setting of two conveyor belts, the reciprocating movement of the moving frame, the moving box and the powder screening net is stable, which not only improves the stability of the entire device, but also increases the service life of the entire device. Therefore, compared with the method of using cylinders, the driving mechanism of the present invention is not only stable during operation, but also has a long service life; when the moving frame drives the moving box and the screening net to reciprocate, the sludge is dispersed to various positions of the screening net and will not accumulate together, so that the sludge can be better screened by the screening net. After screening, small particles of sludge fall to the bottom of the box. At the same time, when the moving box and the powder screening net are reciprocating, the setting of the second guide plate of the first guide plate makes the screening The separation net also vibrates in the upward and downward directions on the moving box, so that the sludge collides with the screening net, thereby better dispersing the sludge and avoiding the sludge from accumulating on the screening net, so that the sludge is better screened by the powder screening net, and the screening effect is good; after screening, small particles of sludge fall to the bottom of the box, and large particles of sludge remain on the screening net, and then the first suction pump is turned on to suck the sludge on the screening net into the crushing box, and then the second motor is turned on to crush and separate the sludge through multiple cutting knives, so that the sludge is broken into small particles of sludge, and then the second suction pump is turned on to suck the crushed sludge into the upper hopper, and the sludge falls into the box again through the upper hopper and is re-screened. If there are still large particles of sludge, the screening can be repeated for multiple times, so that the sludge can be screened for multiple cycles, which greatly improves the qualified rate of sludge particle size and also greatly improves the sludge treatment efficiency; finally, the treated sludge is discharged through the discharge pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 It is a front view of the present invention;

[0017] Figure 3 for Figure 2 AA line section view;

[0018] Figure 4 for Figure 3 BB line structural cross-sectional view;

[0019] Figure 5 for Figure 4 A in the enlarged view;

[0020] Figure 6 for Figure 4 The enlarged view of point B in the figure;

[0021] Figure 7 for Figure 2 The CC line section view in the figure;

[0022] Figure 8 for Figure 7 DD line section view;

[0023] Fig. 9 It is a partial structural schematic diagram of the present invention;

[0024] Fig.10 It is a partial structural schematic diagram of the present invention;

[0025] Fig.11 It is a partial structural schematic diagram of the present invention.

[0026] In the figure: 1, box; 2, driving mechanism; 3, mobile box; 4, screening net; 5, connecting mechanism; 6, vibration mechanism; 7, upper hopper; 8, circulating crushing mechanism; 9, discharge pipe; 10, first valve; 61, first guide plate; 62, second guide plate; 63, first slide; 64, second slide; 65, first spring; 66, second spring; 67, third spring; 68, fourth spring; 69, first upper sealing plate; 610, first Lower sealing plate; 611, second upper sealing plate; 612, second lower sealing plate; 613, round rod; 6011, body; 6012, arc groove; 6013, arc convex block; 20, mobile frame; 21, support plate; 22, first base; 23, frame; 24, first shaft; 25, second shaft; 26, first motor; 27, first gear; 28, second gear; 29, third gear; 210, fourth gear; 211, third Axis body; 212, fifth gear; 213, fourth shaft body; 214, sixth gear; 215, first connecting rod; 216, first short shaft; 217, second connecting rod; 218, first external gear; 219, second external gear; 220, first conveyor belt; 221, third connecting rod; 222, second short shaft; 223, fourth connecting rod; 224, third external gear; 225, fourth external gear; 226, second conveyor belt; 51, third slide; 52. Connecting rod; 53. Large sealing plate; 81. Crushing box; 82. Support rod; 83. First suction pump; 84. First tube body; 85. Second tube body; 86. Third tube body; 87. Second valve; 88. Third valve; 89. Second base; 810. Rotating shaft; 811. Cutting knife; 812. Second motor; 813. Second suction pump; 814. Fourth tube body; 815. Fifth tube body; 816. Fourth valve; 817. Fifth valve. DETAILED DESCRIPTION

[0027] 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.

[0028] like Figure 1-Figure 11As shown, a screening device for sludge treatment described in the present invention comprises a box body 1, a driving mechanism 2 arranged on the box body, a mobile box 3 movably arranged in the box body, a screening net 4 arranged on the mobile box, a connecting mechanism 5 arranged between the driving mechanism and the mobile box, a vibration mechanism 6 arranged on the screening net, a top hopper 7 arranged on the box body, a circulating crushing mechanism 8 arranged on the box body, a discharge pipe 9 fixedly arranged on the mobile box at one end and penetrating the other end movably arranged on the box body, and a first valve 10 arranged on the discharge pipe; the vibration mechanism 6 comprises a first guide plate 61 and a second guide plate 62 fixedly arranged in the box body, a first chute 63 and a second chute 64 arranged on the mobile box, a first spring 65 and a second spring 66 fixedly arranged on the mobile box at one end and fixedly arranged on the screening net at the other end, and a third spring 67 fixedly arranged on the mobile box at one end and fixedly arranged on the screening net at the other end and a fourth spring 68, a first upper sealing plate 69 and a first lower sealing plate 610 fixed on the screening net, a second upper sealing plate 611 and a second lower sealing plate 612 fixed on the screening net, and a round rod 613 passing through and fixed on the screening net; one end of the screening net 4 can be slidably arranged on the first slide groove, and the other end of the screening net 4 can be slidably arranged on the second slide groove; the driving mechanism 2 includes a moving frame 20, a support plate 21 fixed on the box body, a first base 22 fixed on the support plate, a frame 23 fixed on the support plate, a first shaft 24 and a second shaft 25 passing through and rotatably arranged on the frame, a first motor 26 arranged on the first base and used to drive the first shaft to rotate, a first gear 27 and a second gear 28 fixedly sleeved on the first shaft body, a third gear 29 and a fourth gear 210 fixedly sleeved on the second shaft body.When in use, the sludge is put into the upper hopper, and then the sludge falls onto the screening net, and the first motor is turned on at the same time. The first motor drives the driving mechanism to work. When the driving mechanism is working, the third shaft body and the fourth shaft body rotate at the same time, and through the cooperation between multiple gears, the reciprocating movement of the movable frame is stable, and then the reciprocating movement of the movable box and the powder screening net is stable, which not only improves the stability of the entire device, but also further increases the service life of the entire driving mechanism. Therefore, compared with the method of using a cylinder, the driving mechanism of the present invention is not only stable during operation, but also has a long service life; when the movable frame reciprocates, it also drives the movable box and the screening net to reciprocate, so that the sludge is dispersed to various positions of the screening net and will not pile up together, so that the sludge can be better screened by the screening net, so that small particles of sludge fall below the box, and at the same time, when the movable box and the powder screening net reciprocate, through the setting of the second guide plate of the first guide plate, the round rod also vibrates in the up and down direction during the reciprocating movement, so that the powder screening net can reciprocate back and forth and reciprocate up and down. Vibration, The vibration effect is good, which makes the sludge spread out better and facilitates sludge screening; when the screening net vibrates up and down, its two ends slide on the first chute and the second chute respectively, and at the same time the first spring to the fourth spring are extended and retracted, so that the sludge collides with the screening net, so that the sludge is dispersed and the sludge is prevented from accumulating on the screening net, so that the sludge can be better screened by the powder screening net, and the screening effect is good; after screening, small particles of sludge fall to the bottom of the box, and large particles of sludge remain on the screening net, and then the first suction pump is turned on to suck the sludge on the screening net into the crushing box Then, the second motor is turned on to break and separate the sludge through multiple cutting knives, so that the sludge is broken into small particles. Then, the second suction pump is turned on to suck the broken sludge into the upper hopper, and the sludge falls into the box again through the upper hopper and is re-screened. If there are still large particles of sludge, the screening can be repeated multiple times, so that the sludge can be screened multiple times in a cycle, which greatly improves the qualified rate of sludge particle size and also greatly improves the sludge treatment efficiency. Finally, the first valve is opened to discharge the treated sludge through the discharge pipe.

[0029] Specifically, the first guide plate 61 and the second guide plate 62 have the same structure; the first guide plate 61 includes a body 6011, a plurality of arc grooves 6012 arranged on the body at equal intervals, and a plurality of arc protrusions 6013 arranged on the body at equal intervals. When the round rod reciprocates, the round rod is guided by the plurality of arc grooves and the plurality of arc protrusions so that the round rod continuously vibrates in the up-and-down direction, so that the screening net vibrates in the up-and-down direction while reciprocating, so that the sludge is dispersed and the sludge is prevented from accumulating on the screening net.

[0030] Specifically, the plurality of arc grooves 6012 and the plurality of arc protrusions 6013 are arranged alternately, so that the round rods are constantly vibrating in the up-and-down direction, and the screening net is vibrating in the up-and-down direction while reciprocating, which has a better vibration effect, disperses the sludge, avoids the sludge from accumulating on the screening net, and further enables the sludge to be screened better.

[0031] Specifically, the driving mechanism 2 also includes a third shaft 211 that passes through and is rotatably mounted on the frame, a fifth gear 212 that is fixedly mounted on the third shaft, a fourth shaft 213 that passes through and is rotatably mounted on the frame, a sixth gear 214 that is fixedly mounted on the fourth shaft, a first connecting rod 215 that has one end fixedly mounted on the third shaft, a first short shaft 216 that passes through and is rotatably mounted on the first connecting rod, a second connecting rod 217 that has one end fixedly mounted on the first short shaft and the other end rotatably mounted on the movable frame, a first external gear 218 that is fixedly mounted on the first short shaft, and a first gear 219 that is fixedly mounted on the frame. a second external gear 219 on the frame, a first conveyor belt 220 with one end wound around the first external gear and the other end wound around the second external gear, a third connecting rod 221 with one end fixedly mounted on the fourth shaft, a second short shaft 222 rotatably arranged on the third connecting rod, a fourth connecting rod 223 with one end fixedly mounted on the second short shaft and the other end rotatably arranged on the movable frame, a third external gear 224 fixedly mounted on the second short shaft, a fourth external gear 225 fixedly mounted on the frame, and a second conveyor belt 226 with one end wound around the third external gear and the other end wound around the fourth external gear. When the first motor is working, it drives the first shaft to rotate, and at the same time drives the first gear and the second gear on the first shaft to rotate. Since the first gear is meshed with the third gear and the second gear is meshed with the sixth gear, the third gear and the sixth gear are driven to rotate, and then the second shaft, the fourth gear, and the fourth shaft are driven to rotate. Since the fourth gear is meshed with the fifth gear, the fifth gear is also driven to rotate. When the fifth gear rotates, it drives the third shaft to rotate. When the third shaft rotates, it drives the first connecting rod to rotate around the third shaft, and then drives the second connecting rod to rotate, and at the same time, the first conveyor belt rotates around the third shaft, and at the same time, when the fourth shaft rotates, it also drives the third connecting rod to rotate around the fourth shaft, and then drives the fourth connecting rod to rotate, and at the same time, the second conveyor belt rotates around the fourth shaft, so that the moving frame continuously reciprocates. Due to the coordinated arrangement of multiple gears and the arrangement of two conveyor belts, the entire transmission work is more stable, and the reciprocating movement of the screening net is more stable, thereby greatly improving the service life of the entire device.

[0032] Specifically, the first gear 27 is meshed with the third gear 29, the fourth gear 210 is meshed with the fifth gear 211, and the second gear 25 is meshed with the sixth gear 214. The first gear is meshed with the third gear, so that the second shaft body is driven to rotate when the first shaft body rotates; the fourth gear is meshed with the fifth gear, so that the third shaft body is driven to rotate when the second shaft body rotates; the second gear is meshed with the sixth gear, so that the fourth shaft body is driven to rotate when the first shaft body rotates, so as to achieve the effect of overall transmission work being coherent and reasonably connected.

[0033] Specifically, the connecting mechanism 5 includes a third slide 51 provided on the box body, a connecting rod 52 with one end fixed on the mobile frame and the other end fixed on the mobile box, and a large sealing plate 53 fixedly sleeved on the connecting rod; the connecting rod 52 is slidably provided on the third slide. When the mobile frame reciprocates, it also drives the connecting rod and the large sealing plate to reciprocate, and then drives the mobile box and the screening net to reciprocate, so that the sludge falling from the upper hopper falls evenly on various positions of the screening net, avoiding the sludge from accumulating on the screening net.

[0034] Specifically, the circulating crushing mechanism 8 includes a crushing box 81 fixed on the box body, a support rod 82 fixed on the box body, a first suction pump 83 arranged on the support rod, a first tube body 84 and a second tube body 85 arranged on the first suction pump, a third tube body 86 with one end fixed on the mobile box and the other end passing through and movably arranged on the first tube body, a second valve 87 arranged on the second tube body, a third valve 88 arranged on the third tube body, a second base 89 fixed on the crushing box, and a third valve 89 passing through and movably arranged on the first tube body. A rotating shaft 810 arranged on the crushing box, a plurality of cutting knives 811 fixedly arranged on the rotating shaft, a second motor 812 arranged on the second base and used for driving the rotating shaft to rotate, a second suction pump 813 arranged on the crushing box, a fourth tube body 814 with one end arranged on the suction pump and the other end connected to the crushing box, a fifth tube body 815 with one end arranged on the second suction pump and the other end connected to the upper hopper, a fourth valve 816 arranged on the fourth tube body, and a fifth valve 817 arranged on the fifth tube body. After the sludge is screened, small particles of sludge fall below the box, and this part of the sludge meets the particle size requirement, while large particles of sludge remain on the screening net, and this part of the sludge does not meet the particle size requirement; then open the first suction pump, and at the same time open the second valve and the third valve, suck the sludge on the screening net through the first suction pump, and discharge it into the crushing box through the third pipe body, the first pipe body, and the second pipe body in turn, and then close the first suction pump, the second valve and the third valve; then turn on the second motor, and when the second motor is working, it drives the shaft to rotate, and at the same time drives the multiple cutting knives on the shaft to rotate, The sludge in the crushing box is crushed and separated by multiple cutting knives, so that large particles of sludge are dispersed into small particles of sludge, and then the second motor is turned off; then the fourth valve and the fifth valve are opened, and the second suction pump is opened, the sludge in the crushing box is sucked in by the second suction pump, and is discharged into the upper hopper through the fourth pipe body and the fifth pipe body in turn, and falls into the box body through the upper hopper for re-screening; if large particles of sludge still exist after screening, the screening can be repeated multiple times, so that the sludge can be screened multiple times in a cycle, which greatly improves the qualified rate of sludge particle size, and also greatly improves the sludge treatment efficiency.

[0035] The first motor and the second motor are both available on the market, and the first suction pump and the second suction pump are prior art, which will not be elaborated in detail here.

[0036] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A screening device for sludge treatment, characterized in that: The invention comprises a box body (1), a driving mechanism (2) arranged on the box body (1), a movable box (3) movably arranged in the box body (1), a screening net (4) arranged on the movable box (3), a connecting mechanism (5) arranged between the driving mechanism (2) and the movable box (3), a vibrating mechanism (6) arranged on the screening net (4), a loading hopper (7) arranged on the box body (1), a circulating crushing mechanism (8) arranged on the box body (1), a discharge pipe (9) one end of which is fixedly arranged on the movable box (3) and the other end of which passes through the movable box (1), and a connecting mechanism (5) arranged between the driving mechanism (2) and the movable box (3). a first valve (10) on the discharge pipe (9); the vibration mechanism (6) comprises a first guide plate (61) and a second guide plate (62) fixedly arranged in the box body (1), a first slide groove (63) and a second slide groove (64) arranged on the movable box (3), a first spring (65) and a second spring (66) with one end fixedly arranged on the movable box (3) and the other end fixedly arranged on the screening net (4), a third spring (67) and a fourth spring (68) with one end fixedly arranged on the movable box (3) and the other end fixedly arranged on the screening net (4), A first upper sealing plate (69) and a first lower sealing plate (610) fixedly arranged on the screening net (4), a second upper sealing plate (611) and a second lower sealing plate (612) fixedly arranged on the screening net (4), and a round rod (613) penetrating and fixedly arranged on the screening net (4); one end of the screening net (4) is slidably arranged on the first slide groove (63), and the other end of the screening net (4) is slidably arranged on the second slide groove (64); the driving mechanism (2) comprises a moving frame (20), a support plate (21) fixedly arranged on the box body (1); ), a first base (22) fixedly mounted on the support plate (21), a frame (23) fixedly mounted on the support plate (21), a first shaft (24) and a second shaft (25) rotatably mounted on the frame (23), a first motor (26) mounted on the first base (22) and used to drive the first shaft (24) to rotate, a first gear (27) and a second gear (28) fixedly mounted on the first shaft (24), and a third gear (29) and a fourth gear (210) fixedly mounted on the second shaft (25); The driving mechanism (2) further comprises a third shaft (211) passing through and rotatably arranged on the frame (23), a fifth gear (212) fixedly sleeved on the third shaft (211), a fourth shaft (213) passing through and rotatably arranged on the frame (23), a sixth gear (214) fixedly sleeved on the fourth shaft (213), a first connecting rod (215) with one end fixedly sleeved on the third shaft (211), a first short shaft (216) passing through and rotatably arranged on the first connecting rod (215), a second connecting rod (217) with one end fixedly sleeved on the first short shaft (216) and the other end rotatably arranged on the movable frame (20), a first external gear (218) fixedly sleeved on the first short shaft (216), and a first gear (219) fixedly sleeved on the first short shaft (216). a second external gear (219), a first conveyor belt (220) having one end wound around the first external gear (218) and the other end wound around the second external gear (219), a third connecting rod (221) having one end fixedly sleeved on the fourth shaft (213), a second short shaft (222) penetrating and rotatably arranged on the third connecting rod (221), a fourth connecting rod (223) having one end fixedly sleeved on the second short shaft (222) and the other end rotatably arranged on the movable frame (20), a third external gear (224) fixedly sleeved on the second short shaft (222), a fourth external gear (225) fixedly arranged on the frame (23), and a second conveyor belt (226) having one end wound around the third external gear (224) and the other end wound around the fourth external gear (225); The first gear (27) is meshed with the third gear (29), the fourth gear (210) is meshed with the fifth gear (212), and the second gear (28) is meshed with the sixth gear (214); The connecting mechanism (5) comprises a third slide groove (51) provided on the box body (1), a connecting rod (52) having one end fixedly provided on the moving frame (20) and the other end fixedly provided on the moving box (3), and a large sealing plate (53) fixedly sleeved on the connecting rod (52); the connecting rod (52) is slidably provided on the third slide groove (51).

2. A sludge treatment screening device according to claim 1, characterized in that: The first guide plate (61) and the second guide plate (62) have the same structure; the first guide plate (61) comprises a main body (6011), a plurality of arc-shaped grooves (6012) arranged on the main body (6011) at equal intervals, and a plurality of arc-shaped protrusions (6013) arranged on the main body (6011) at equal intervals.

3. A sludge treatment screening device according to claim 2, characterized in that: The plurality of arc-shaped grooves (6012) and the plurality of arc-shaped protrusions (6013) are arranged in a staggered manner.

4. A sludge treatment screening device according to claim 1, characterized in that: The circulating crushing mechanism (8) comprises a crushing box (81) fixedly mounted on the box body (1), a support rod (82) fixedly mounted on the box body (1), a first suction pump (83) mounted on the support rod (82), a first tube body (84) and a second tube body (85) mounted on the first suction pump (83), a third tube body (86) having one end fixedly mounted on the movable box (3) and the other end penetrating and movably mounted on the first tube body (84), a second valve (87) mounted on the second tube body (85), a third valve (88) mounted on the third tube body (86), a second base (89) fixedly mounted on the crushing box (81), and a valve (89) penetrating and rotatably mounted on the crushing box (81). a rotating shaft (810) on the rotating shaft (810), a plurality of cutting knives (811) fixedly mounted on the rotating shaft (810), a second motor (812) mounted on the second base (89) and used for driving the rotating shaft (810) to rotate, a second suction pump (813) mounted on the crushing box (81), a fourth tube body (814) having one end mounted on the second suction pump (813) and the other end connected to the crushing box (81), a fifth tube body (815) having one end mounted on the second suction pump (813) and the other end connected to the upper hopper (7), a fourth valve (816) mounted on the fourth tube body (814), and a fifth valve (817) mounted on the fifth tube body (815).

Images