Cloth pushing and spreading device of dehydration equipment and dehydration equipment

Abstract

The invention provides dewatering equipment and a cloth pushing and spreading device thereof.The cloth pushing and spreading device of the dewatering equipment comprises a spreading body, a spreading opening is formed in the bottom of the spreading body, a cloth pushing head obliquely extending downwards is arranged at the front end of the spreading body, and the first end of the cloth pushing head is connected with the spreading body; a second end opposite to the first end is lower than the first end, and the position of the second end of the cloth pushing head in the direction perpendicular to the bottom of the material spreading body is changeable. The cloth pushing head which obliquely extends downwards is arranged at the front end of the spreading main body, so that in the cloth pushing and spreading process of the spreading main body, filter cloth is dragged out from a cloth roller by the cloth pushing head, the filter cloth below the spreading main body is stretched to be flat by utilizing counter-acting force, and meanwhile, materials are spread on the filter cloth below the spreading main body; the laying effect of the filter cloth can be guaranteed, meanwhile, a space for laying materials can be reserved between the filter cloth below the material laying main body and the material laying opening, and the materials can be prevented from being adhered to the material laying main body.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a cloth pushing and spreading device for sludge dewatering equipment, and also relates to sludge dewatering equipment equipped with the cloth pushing and spreading device. Background Art

[0002] As the amount of urban sewage continues to grow, the number of corresponding sewage treatment facilities has also increased, and the amount of residual sludge, a byproduct of sewage treatment, has also increased. How to properly handle and dispose of these sludges that are constantly generated and increasing in quantity has become an urgent problem to be solved in my country's environmental protection. The moisture content of residual sludge is generally above 80%. Sludge dehydration is a key step in its treatment process. However, the difficulty of deep dehydration of sludge has become a bottleneck problem restricting the harmless and resource-based treatment of sludge.

[0003] There are many methods for solid-liquid separation, including pressing, extrusion, centrifugation, etc., and the corresponding solid-liquid separation equipment is also diverse. Among them, the stacking extrusion device has the characteristics of high extrusion pressure, high extrusion limit, and long extrusion time, and has a good dehydration effect, so it is widely used.

[0004] The filter cloth of the stacking extrusion device is generally an extra-long continuous filter cloth. During the operation, multiple layers of filter cloth need to be stacked and spread, and the sludge needs to be evenly spread between the filter cloths.

[0005] In the prior art, the filter cloth is generally laid flat first, and then the sludge is laid on the filter cloth. The sludge laying efficiency is low. In order to improve efficiency, the Chinese utility model patent with application number CN202023099235.0 discloses a fixing device for laying laminated filter cloth, which lays the sludge on the filter cloth while laying the filter cloth. Specifically, the proximal end of the filter cloth is first pressed, and the discharge port of the sludge spreading mechanism is used to push the filter cloth forward. During the feeding process of the sludge spreading mechanism, the discharge port of the sludge spreading mechanism spreads the sludge evenly on the filter cloth.

[0006] However, in the above scheme, the sludge spreading mechanism uses the discharge port to press against the filter cloth during the sludge spreading process, so that the filter cloth is unwound from the cloth roll, and the filter cloth below the discharge port fits with the discharge port. When the sludge spreading mechanism feeds forward and spreads the material at the same time, it is easy for the material to adhere to the bottom of the sludge spreading mechanism and the filter cloth above the discharge port, resulting in poor laying effect of the filter cloth. At the same time, the sludge is easy to adhere to the filter cloth and the sludge spreading mechanism, which will also cause the problem of poor sludge spreading effect. Poor spreading effect of the filter cloth will result in part of the sludge not being dehydrated by the filter cloth, and uneven sludge laying will result in uneven force during extrusion, affecting the moisture content of the sludge.

[0007] Therefore, designing a cloth pushing and spreading device that can spread the sludge while spreading the filter cloth and can ensure the spreading effect of the filter cloth and the sludge has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0008] The invention provides a cloth pushing and spreading device for dewatering equipment, which is used to solve the problem that the existing cloth pushing and spreading device has poor spreading effect on filter cloth and sludge.

[0009] One purpose of the present invention is to solve the problem that when the existing cloth pushing and spreading device is spreading the filter cloth and the sludge simultaneously, the spreading effect of the filter cloth and the sludge is easily affected due to the adhesion of the sludge to the filter cloth and the cloth pushing and spreading device.

[0010] Another object of the present invention is to solve the problem that the existing cloth pushing and spreading device is prone to sticking to sludge during the retreat process.

[0011] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0012] A cloth pushing and spreading device of sludge dewatering equipment includes a spreading body, a spreading opening is arranged at the bottom of the spreading body, a cloth pushing head is arranged at the front end of the spreading body and extends obliquely downward, a first end of the cloth pushing head is connected to the spreading body, a second end opposite to the first end is lower than the first end, and the position of the second end of the cloth pushing head in a direction vertical to the bottom of the spreading body is changeable.

[0013] Furthermore, at least when the cloth pushing head is in contact with the filter cloth, the second end of the cloth pushing head is lower than the material laying opening, and the height difference between the second end of the cloth pushing head and the material laying opening is greater than the thickness of the material laid on the filter cloth; preferably, the material laying opening is arranged close to the cloth pushing head.

[0014] Furthermore, the cloth pushing head is fixed on the material spreading body, and at least a part of the cloth pushing head is made of elastic material; or, the cloth pushing head is rotatably connected to the material spreading body, and the cloth pushing head is configured with a first position for rotating upward to an upper limit, and a second position for rotating downward to a lower limit, and when the cloth pushing head is in the first position and the second position, the height difference of the second end of the cloth pushing head is greater than the thickness of the material spread on the filter cloth.

[0015] Furthermore, the cloth pushing head is rotatably connected to the material spreading body. When the cloth pushing head rotates to the first position, the height of the second end of the cloth pushing head is lower than the height of the rotation center of the cloth pushing head. An elastic member for driving the cloth pushing head to rotate to the first position is arranged between the cloth pushing head and the material spreading body.

[0016] Further, in a direction from the first end to the second end of the cloth pushing head, a thickness of the cloth pushing head in a direction perpendicular to the direction from the first end to the second end gradually decreases.

[0017] Furthermore, the cross-section of the second end of the cloth pushing head is arranged to be an arc shape protruding in the direction away from the first end; preferably, in the direction perpendicular to the first end to the second end of the cloth pushing head, the maximum thickness of the arc shape of the second end of the cloth pushing head is less than the thickness of the first end of the cloth pushing head.

[0018] Furthermore, the second end of the cloth pushing head is a solid cylinder with a diameter smaller than the thickness of the front end of the material spreading body. The solid cylinder is connected to the material spreading body through a support plate extending downward from the front end of the material spreading body. The end of the support plate away from the solid cylinder is the first end of the cloth pushing head.

[0019] Furthermore, a support plate extends obliquely from the upper side of the solid column along the tangent direction of the solid body toward the upper edge of the front end of the paving body; or, two support plates extend obliquely from the upper and lower sides of the solid column along the tangent direction of the solid body toward the upper and lower edges of the front end of the paving body; the end of the support plate is smoothly transitionally connected to the outer peripheral wall of the solid column.

[0020] Furthermore, a notch is provided in the middle of the second end of the cloth pushing head, and the notch penetrates the cloth pushing head along the vertical direction perpendicular to the first end to the second end of the cloth pushing head, and the opening of the notch faces the direction away from the first end of the cloth pushing head; preferably, a cloth pressing assembly is provided on the side of the filter cylinder away from the cloth pushing and spreading device; along the horizontal direction perpendicular to the first end to the second end of the cloth pushing head, the width of the working end of the cloth pressing assembly is smaller than the width of the notch; the working end of the cloth pressing assembly passes through the notch from top to bottom, and presses the filter cloth covered on the second end of the cloth pushing head onto the filter cylinder.

[0021] The present invention also provides a dewatering device, comprising a filter cylinder, the top of which is provided with a cloth pushing and spreading device of the above-mentioned dewatering device, which is used for laying filter cloths in layers in the filter cylinder and spraying materials onto the filter cloths; a spreading pipe is provided in the shell of the spreading body, the spreading pipe comprises a variable diameter section and an output section respectively having channels, a spreading opening is provided at the second end of the output section, the second end of the variable diameter section is connected with the first end of the output section, so that the variable diameter section channel is connected with the output section channel; the channels of the output section have the same cross-section perpendicular to the forward direction of the materials, and the bottom surface of the output section carrying the materials is a plane; the cross-sectional area of ​​the variable diameter section channel at the second end is less than or equal to the cross-sectional area at the first end, and the vertical cross-sectional area of ​​the output section channel is the same as the vertical cross-sectional area of ​​the variable diameter section channel at the second end; wherein, in the horizontal direction perpendicular to the material flow direction, the width of the second end of the variable diameter section channel is greater than the width of the first end; in the vertical direction perpendicular to the material flow direction, the height of the second end of the variable diameter section channel is less than the height of the first end.

[0022] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0023] 1. The present invention provides a cloth-pushing head that extends obliquely downward at the front end of a material-placing body, arranges a material-placing opening at the bottom of the material-placing body behind the cloth-pushing head, and arranges the second end of the cloth-pushing head to be lower than the material-placing opening, so that in the process of feeding the material-placing body to push and spread the cloth, the cloth-pushing head drags the filter cloth from the cloth-winding roller, and utilizes the reaction force to flatten the filter cloth under the material-placing body, and at the same time lays the material on the filter cloth under the material-placing body. On the one hand, the laying effect of the filter cloth can be guaranteed, and on the other hand, the height difference between the second end of the cloth-pushing head and the material-placing opening can reserve a space for laying the material between the filter cloth under the material-placing body and the material-placing opening, which can avoid the material from sticking to the material-placing body and improve the spreading effect of the material, so that the material can be evenly spread between two adjacent layers of filter cloth, which is beneficial to improving the dehydration effect of the material.

[0024] 2. The present invention arranges a cloth pushing head to extend obliquely downward from the front end of the material spreading body, and the thickness of the cloth pushing head gradually decreases in the direction away from the material spreading body, and the second end of the cloth pushing head is arranged in an arc shape, so that when the cloth pushing head of the material spreading body supports the filter cloth and feeds forward, the filter cloth slides smoothly along the cloth pushing head in the process of being dragged out from the cloth winding roller, thereby reducing the resistance of the cloth pushing head to the filter cloth, improving the smoothness of the sliding of the filter cloth along the second end of the cloth pushing head, and avoiding the cloth pushing head from damaging the filter cloth during the cloth pushing process.

[0025] 3. The present invention sets a rotational cooperation between the cloth pushing head and the material spreading body. When the material spreading body is fed forward, the cloth pushing head can be controlled to rotate downward, so that the second end of the cloth pushing head is lower than the material spreading opening, and a height difference greater than the thickness of the material spread on the filter cloth is formed between the cloth pushing head and the material spreading opening; when the material spreading body is retreated, the cloth pushing head can be controlled to rotate upward, so that the second end of the cloth pushing head is higher than the material on the filter cloth, which can prevent the cloth pushing head from scraping the material under the material spreading body and prevent the material from sticking to the cloth pushing head, thereby improving the material paving effect and, at the same time, helping to increase the retreat speed of the material spreading body and the rate of material spreading.

[0026] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0028] Figure 1 It is a cross-sectional schematic diagram of a dehydration device in an embodiment of the present invention;

[0029] Figure 2For the embodiment of the present invention Figure 1 The enlarged view of point B in the middle;

[0030] Figure 3 It is a structural schematic diagram of a dehydration device in an embodiment of the present invention;

[0031] Figure 4 It is a structural schematic diagram of the connection between the cloth pushing and spreading device and the material conveying pipe in an embodiment of the present invention;

[0032] Figure 5 It is a structural schematic diagram of a cloth pushing and spreading device in an embodiment of the present invention;

[0033] Figure 6 It is a top view of the paving body in an embodiment of the present invention;

[0034] Figure 7 For the embodiment of the present invention Figure 6 Schematic diagram of the cross section at AA in the middle;

[0035] Figure 8 For the embodiment of the present invention Figure 7 The enlarged view of point A in the middle;

[0036] Fig. 9 It is a structural schematic diagram of the cloth pushing head in the first position according to the embodiment of the present invention;

[0037] Fig.10 It is a structural schematic diagram of the cloth pushing head in the second position according to the embodiment of the present invention;

[0038] Fig.11 It is a structural schematic diagram of the paving body in an embodiment of the present invention;

[0039] Fig.12 An exploded view of the connection structure between the installation joint and the material laying pipe in an embodiment of the present invention;

[0040] Fig.13 It is a cross-sectional schematic diagram of the connection between the installation joint and the material laying pipe in an embodiment of the present invention;

[0041] Fig.14 It is a structural schematic diagram of the first guide assembly in an embodiment of the present invention;

[0042] Fig.15 It is a cross-sectional schematic diagram of the first guide assembly in an embodiment of the present invention.

[0043] Description of the main components in the figure:

[0044] 1. cloth-pushing and spreading device; 11. spreading body; 111. shell; 112. spreading pipe; 1121. spreading port; 1122. input section; 1123. diameter-changing section; 1124. output section; 113. cloth-pushing head; 1131. first support plate; 1132. second support plate; 1133. reinforcing plate; 1134. solid cylinder; 1135. notch; 12. base; 121. second driving part; 13. driving device; 14. front driving device; 15. feeding pipe; 16. mounting joint; 161. first mounting member; 1 611, radial protrusion; 1612, plug connector; 1613, threaded head; 162, second mounting member; 163, connecting pipe; 17, first guide assembly; 171, first track; 1711, groove; 1712, limiter; 172, roller; 18, second guide assembly; 181, second track; 182, slider; 183, first driving unit; 2, filter cylinder; 3, discharge collecting hopper; 4, frame; 41, cloth guide roller; 5, first cloth pressing assembly; 6, second cloth pressing assembly; 7, cloth winding roller; 71, filter cloth; 8, extrusion equipment.

[0045] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0047] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] like Figures 1 to 15As shown, in an embodiment of the present invention, a sludge dewatering device is introduced, including a cloth pushing and spreading device 1 and a filter cylinder 2. The cloth pushing and spreading device 1 spreads a filter cloth 71 in the filter cylinder 2 and sprays the material to be processed onto the filter cloth 71.

[0050] During the spreading process, the filter cloth 71 is fixed by two sets of cloth pressing assemblies.

[0051] In some specific embodiments, the cloth pushing and spreading device 1 is configured to move the folded filter cloth 71 back and forth between a first side edge and a second side edge opposite to the filter cylinder 2 , and spray the material to be processed onto the filter cloth 71 .

[0052] In the moving direction of the filter cloth 71 , a first cloth pressing assembly 5 and a second cloth pressing assembly 6 are respectively provided on the first side edge and the second side edge opposite to the top of the filter cylinder 2 .

[0053] The filter cloth 71 is rolled up on the cloth winding roller 7 . The cloth winding roller 7 containing the filter cloth 71 and the cloth pushing and spreading device 1 are located on the same side of the filter cylinder 2 . The spreading opening 1121 of the cloth pushing and spreading device 1 is higher than the upper edge of the filter cylinder 2 .

[0054] One or more cloth guide rollers 41 are arranged between the cloth rolling roller 7 and the filter cylinder. After the filter cloth 71 passes around the cloth guide roller 41, the first cloth pressing assembly 5 presses the filter cloth onto the filter cylinder.

[0055] During the process of laying the filter cloth 71 from the first side to the second side of the filter cylinder 2, when the cloth pushing and spreading device 1 is outside the filter cylinder 2, the first cloth pressing assembly 5 presses the filter cloth 71 on the first side down on the filter cylinder 2; the cloth pushing and spreading device 1 moves toward the second side of the filter cylinder 2 against the filter cloth 71, and at the same time, spreads the material evenly on the filter cloth 71, and the other end of the filter cloth 71 is dragged out from the cloth winding roller 7; when reaching the second side of the filter cylinder 2, the second cloth pressing assembly 6 presses the filter cloth 71 on the second side down on the filter cylinder 2, and the cloth pushing and spreading device 1 returns to its original position.

[0056] During the retreat of the cloth pushing and spreading device 1, and / or after the cloth pushing and spreading device 1 exits the filter cylinder 2, the first cloth pressing assembly 5 is pulled out; after the cloth pushing and spreading device 1 exits the filter cylinder 2, the first cloth pressing assembly 5 is activated again to press the filter cloth 71 on the first side down on the filter cylinder 2.

[0057] By repeating the movement, several layers of the material to be processed wrapped by the filter cloth 71 are laid up and down in the filter cylinder 2 .

[0058] It also includes an extrusion device 8, which is located above the filter cylinder 2 and is used to extrude the material.

[0059] In this embodiment, the material to be processed is a mixture of solid and liquid, for example, a water-containing material, and there is no limitation on the water content.

[0060] In this embodiment, the sludge dewatering equipment is preferably used for solid-liquid separation of sludge with high water content.

[0061] In this embodiment, in order to ensure the wrapping of the material, the width of the filter cloth is set to be greater than the width of the internal space of the filter cylinder, and the width of the spreading opening of the cloth-pushing and spreading device is less than or equal to the width of the internal space of the filter cylinder. After the cloth-pushing and spreading device spreads the material on the filter cloth, the movable bottom plate of the filter cylinder moves downward, and the filter cloth carrying the material falls into the filter cylinder. The side edges of the filter cloth are bent upward under the obstruction of the filter cylinder, and the material is wrapped from both sides of the material to prevent the material from flowing out from both sides of the filter cloth.

[0062] In some preferred embodiments, there is a certain interval between the cloth pressing position of the first cloth pressing assembly and the internal space of the filter cylinder. Therefore, when the movable bottom plate of the filter cylinder moves downward, part of the filter cloth exceeding the internal space of the filter cylinder is bent upward under the obstruction of the first side of the filter cylinder, so that the side of the material close to the cloth pushing and spreading device is also wrapped by the filter cloth.

[0063] Embodiment 1

[0064] The cloth pushing and spreading device 1 of the sludge dewatering equipment in the prior art moves forward against the filter cloth 71 and spreads the material on the filter cloth 71 at the same time. The spreading port is used to press against the filter cloth so that the filter cloth is unwound from the cloth winding roller. The filter cloth below the spreading port is fitted with the spreading port. When the cloth pushing and spreading device is fed forward and spreads the material at the same time, the material is easily caused to adhere to the bottom of the cloth pushing and spreading device and the filter cloth above the spreading port.

[0065] In the prior art, in order to prevent the material from sticking to the filter cloth 71 and the cloth-pushing and spreading device 1, a solution is generally adopted in which the cloth-pushing and spreading device spreads the material during the retreat process, that is, after the cloth-pushing and spreading device pushes the filter cloth forward to the farthest end, the filter cloth is fixed by the second cloth-pressing assembly to form a height difference between the filter cloth below the spreading opening and the spreading opening to accommodate the material flowing out of the spreading opening, and then the cloth-pushing and spreading device retreats, and spreads the material during the retreat process. The spreading efficiency of this solution is too low.

[0066] like Figures 1 to 15 As shown, in an embodiment of the present invention, a cloth pushing and spreading device 1 of a sludge dewatering equipment is introduced to solve the above-mentioned problem, which can not only ensure the efficiency of laying materials, but also improve the spreading effect of the cloth pushing and spreading device 1 on the filter cloth 71 and the material.

[0067] like Figure 8As shown, in this embodiment, the cloth pushing and spreading device 1 includes a spreading body 11, and a spreading opening 1121 is provided at the bottom of the spreading body 11. A cloth pushing head 113 extending obliquely downward is provided at the front end of the spreading body 11, and the first end of the cloth pushing head 113 is connected to the spreading body 11, and the second end opposite to the first end is lower than the first end, and the position of the second end of the cloth pushing head 113 in the direction perpendicular to the bottom of the spreading body 11 is variable. The second end of the cloth pushing head 113 opposite to the first end of the cloth pushing head 113 is lower than the spreading opening 1121 at least when the cloth pushing head 113 is in contact with the filter cloth 71.

[0068] In the above scheme, the front end of the material-laying body 11 is specifically the end of the material-laying body 11 facing the filter cylinder 2, that is, the end that abuts against the filter cloth 71 during the feeding process of the material-laying body 11. During the feeding process of the material-laying body 11, the cloth pushing head 113 at the front end of the material-laying body 11 supports the filter cloth 71, so that the filter cloth 71 is dragged out from the cloth winding roller 7.

[0069] like Figure 1 and Figure 2 As shown, the cloth pushing head 113 at the front end of the material spreading body 11 presses against the filter cloth 71 so that the filter cloth 71 is pulled out from the cloth winding roller 7, and the filter cloth is wrapped around the front end of the material spreading body 11, and the filter cloth slides along the front end of the material spreading body 11 during the process of the material spreading body 11 being fed forward.

[0070] By arranging a cloth pushing head 113 which extends downwardly and obliquely at the front end of the material spreading body 11, arranging the material spreading opening 1121 at the bottom of the material spreading body 11 behind the cloth pushing head 113, and arranging the second end of the cloth pushing head 113 to be lower than the material spreading opening 1121 when the cloth pushing head 113 abuts against the filter cloth 71, the cloth pushing head 113 can drag the filter cloth 71 off the cloth winding roller 7 during the feeding and material spreading process of the material spreading body 11, and the filter cloth 71 under the material spreading body 11 can be stretched flat by the reaction force, and the material can be spread on the cloth spreading body 11 at the same time. On the filter cloth 71 below the paving body 11, on the one hand, the laying effect of the filter cloth 71 can be guaranteed, and on the other hand, the height difference between the second end of the cloth pushing head 113 and the paving port 1121 can reserve space for laying materials between the filter cloth 71 below the paving body 11 and the paving port 1121, which can avoid the material from sticking to the paving body 11 and improve the sludge spreading effect, so that the material can be evenly spread between two adjacent layers of filter cloth 71, which is beneficial to improving the dehydration effect of the material.

[0071] Preferably, in this embodiment, at least when the cloth pushing head 113 abuts against the filter cloth 71, the height difference between the second end of the cloth pushing head 113 and the material spreading opening 1121 is greater than the thickness of the material spread on the filter cloth, thereby further preventing the material from sticking to the material spreading body 11.

[0072] In some specific embodiments, the cloth pushing head 113 extends downwardly from the front end of the material spreading body 11, and the thickness of the cloth pushing head 113 in the direction perpendicular to the first end to the second end gradually decreases from the first end to the second end of the cloth pushing head 113. Specifically, the thickness of the cloth pushing head 113 gradually decreases in the direction away from the material spreading body 11.

[0073] Through the above-mentioned arrangement, when the cloth pushing head 113 of the material spreading body 11 pushes against the filter cloth 71 and feeds forward, and the filter cloth 71 is dragged out from the cloth winding roller 7, the filter cloth 71 slides smoothly along the cloth pushing head 113, thereby reducing the resistance of the cloth pushing head 113 to the filter cloth 71. At the same time, it can avoid that the filter cloth 71 has excessive surplus at the second side of the filter cylinder 2, and can make the filter cloth 71 above the material flat after the material spreading body 11 is retreated.

[0074] Preferably, in this embodiment, the second end of the cloth pushing head 113 is configured to be arc-shaped, thereby further improving the smoothness of the filter cloth 71 sliding along the second end of the cloth pushing head 113 and preventing the cloth pushing head 113 from damaging the filter cloth 71 during the cloth pushing process.

[0075] Preferably, in a direction perpendicular to the first end to the second end of the cloth pushing head 113 , the maximum thickness of the arc shape at the second end of the cloth pushing head 113 is smaller than the thickness of the first end of the cloth pushing head 113 .

[0076] In this embodiment, the cloth pushing head 113 can be set as a solid structure or a hollow structure.

[0077] In some specific embodiments, the second end of the cloth pushing head 113 is a solid cylinder 1134 whose diameter is smaller than the thickness of the front end of the material spreading body 11. The solid cylinder 1134 is connected to the material spreading body 11 through a support plate extending downward from the front end of the material spreading body 11. The end of the support plate away from the solid cylinder 1134 is the first end of the cloth pushing head 113.

[0078] Specifically, the solid column 1134 is disposed in front of the material paving body 11, is spaced apart from the material paving body 11, and is connected to the front end of the material paving body 11 through the support plate.

[0079] In this embodiment, the solid cylinder 1134 constitutes the second end of the cloth pushing head 113, which can prevent the second end of the cloth pushing head from being deformed and increase the service life of the device.

[0080] In some possible embodiments, a support plate extends obliquely from the upper side of the solid column 1134 along the tangent direction of the solid body toward the upper edge of the front end of the paving body 11, and the end of the support plate is smoothly transitioned to the outer peripheral wall of the solid column 1134.

[0081] In other possible embodiments, the two support plates extend obliquely from the upper and lower sides of the solid column 1134 along the tangent direction of the solid body toward the upper and lower edges of the front end of the paving body 11; the ends of the support plates are smoothly transitionally connected to the outer peripheral wall of the solid column 1134.

[0082] Preferably, the diameter of the solid cylinder 1134 is smaller than the thickness of the front end of the material laying body 11; the support plate includes two, which extend obliquely from the outer peripheral wall of the solid cylinder 1134 to the upper and lower edges of the front end of the material laying body 11, respectively, and the end of the support plate away from the solid body constitutes the first end of the cloth pushing head. One end of the support plate is connected to the solid cylinder 1134 as a whole, and the other end is connected to the front end of the material laying body 11, and the end of the support plate is smoothly connected to the outer peripheral wall of the solid cylinder 1134, so that the second end of the cloth pushing head 113 forms a smooth surface to avoid scratching the filter cloth 71 during the cloth pushing process.

[0083] Preferably, in this embodiment, the two support plates are tangent to the upper and lower sides of the solid column 1134 respectively.

[0084] Preferably, in this embodiment, a reinforcing plate 1133 is provided between the two support plates to reinforce the structure of the cloth pushing head 113 .

[0085] like Figure 8 As shown, in some specific embodiments, the extension length of the support plate connected to the solid column 1134 from the bottom of the solid column 1134 is smaller than the extension length of the support plate connected to the solid column 1134 from the top of the solid column 1134, and the reinforcing plate 1133 is arranged between one end of the support plate connected to the solid column 1134 from the bottom of the solid column 1134 away from the solid column 1134 and the middle part of the support plate connected to the solid column 1134 from the top of the solid column 1134.

[0086] In this embodiment, the cloth pushing head 113 and the material spreading body 11 can be connected as one body, or the cloth pushing head 113 and the material spreading body 11 can be arranged to rotate together.

[0087] Preferably, in this embodiment, at least the end of the support plate connected to the solid column 1134 from above the solid column 1134 away from the solid column 1134 is smoothly transitionally connected to the paving body 11 .

[0088] Preferably, in this embodiment, the shape of one end of the cloth pushing head 113 connected to the material spreading body 11 is adapted to the shape of the front end of the material spreading body 11 .

[0089] In some possible embodiments, the cloth pushing head 113 is connected as a whole with the material spreading body 11. Specifically, one end of the two support plates of the cloth pushing head 113 away from the solid cylinder 1134 is respectively connected to the upper and lower edges of the front end of the material spreading body 11, and the second end of the cloth pushing head 113 is lower than the material spreading opening 1121.

[0090] In this embodiment, in order to prevent the cloth-pushing head 113 from scraping the material under the material-paving body 11, the material-paving body 11 can be controlled to rise when the material-paving body 11 retreats, or the cloth-pushing and material-paving device can be controlled to rise as a whole, or the movable bottom plate of the filter cylinder can be controlled to move downward, so that the cloth-pushing head 113 can avoid the material laid on the filter cloth. In some preferred embodiments, the movable bottom plate is initially moved to a position slightly lower than the top of the filter cylinder 2, and the interval between the movable bottom plate and the top of the filter cylinder 2 is greater than or equal to the thickness of the material laid on the filter cloth 71; when the front end of the cloth-pushing and material-paving device 1 moves to the outside of the first side along the feeding direction, the movable bottom plate of the filter cylinder 2 moves downward by a stroke that matches the thickness of the material laid on the filter cloth 71 and the sum of the thickness of the filter cloth 71.

[0091] Specifically, in this embodiment, the filter cylinder includes a cylinder body and a movable bottom plate located inside the cylinder body. The cylinder body is a hollow cubic structure with water outlet holes on the sides. The top of the cylinder body is open, the movable bottom plate matches the cross-section of the cylinder body cavity and can move up and down along the cylinder body, and the bottom of the cylinder body is open.

[0092] Preferably, the cloth-pushing head 113 is fixed on the material-laying body 11, and at least part of the cloth-pushing head 113 is made of elastic material. Specifically, the middle part of the support plate connected between the solid cylinder 1134 and the material-laying body 11 is at least partly made of elastic material. When the material-laying body 11 is fed forward, the solid cylinder 1134 abuts against the filter cloth 71, and driven by the reaction force of the filter cloth 71, the part of the cloth-pushing head 113 made of elastic material produces elastic deformation, and the second end of the cloth-pushing head 113 rotates downward in the vertical direction, and a height difference greater than the thickness of the material laid on the filter cloth is formed between the second end of the cloth-pushing head 113 and the material-laying opening 1121. When the material-laying body 11 retreats, the part of the cloth-pushing head 113 made of elastic material rebounds to prevent the material from sticking to the cloth-pushing head 113.

[0093] like Fig. 9 and Fig.10As shown, in some other possible embodiments, the cloth pushing head 113 is rotatably matched with the material laying body 11. Thus, when the material laying body 11 is fed forward, the cloth pushing head 113 can be controlled to rotate downward, so that the second end of the cloth pushing head 113 is lower than the material laying opening 1121, and a height difference greater than the thickness of the material laid on the filter cloth is formed between the cloth pushing head 113 and the material laying opening 1121. When the material laying body 11 is retracted, the cloth pushing head 113 can be controlled to rotate upward, so that the second end of the cloth pushing head 113 is higher than the material on the filter cloth 71, which can prevent the cloth pushing head 113 from scraping the material under the material laying body 11 and preventing the material from sticking to the cloth pushing head 113, thereby improving the material paving effect. At the same time, it is beneficial to increase the retraction speed of the material laying body 11 and the material laying rate.

[0094] Preferably, in this embodiment, the cloth pushing head 113 includes a first position for rotating upward to an upper limit, and a second position for rotating downward to a lower limit. When the cloth pushing head 113 is in the first position and the second position, the height difference of the second end of the cloth pushing head 113 is greater than the thickness of the material laid on the filter cloth.

[0095] In this embodiment, a structure for driving the cloth pushing head 113 to rotate between the first position and the second position may be provided between the cloth pushing head 113 and the material spreading body 11 .

[0096] In this embodiment, the cloth pushing head 113 can be driven by a separate small motor.

[0097] Preferably, in this embodiment, an elastic member is provided between the cloth pushing head 113 and the material spreading body 11, and the elastic member is used to drive the cloth pushing head 113 to rotate toward the first position. During the forward feeding of the material spreading body 11, the reaction force applied by the filter cloth 71 to the cloth pushing head 113 is greater than the elastic force of the elastic member, and the cloth pushing head 113 rotates toward the second position under the driving force of the reaction force of the filter cloth 71. Thus, the cloth pushing head 113 can be automatically switched between the first position and the second position, and can match the cloth pushing and material spreading action of the material spreading body 11.

[0098] Specifically, in this embodiment, when the cloth pushing head 113 rotates to the first position, the height of the axis of the solid cylinder 1134 is lower than the height of the rotation center of the cloth pushing head 113, thereby ensuring that the cloth pushing head 113 can smoothly rotate to the second position under the reaction force of the filter cloth 71.

[0099] In some possible embodiments, a limiting structure is provided between the cloth pushing head 113 and the material spreading body 11 for limiting the upper limit position of the cloth pushing head 113 when rotating upward and the lower limit position of the cloth pushing head 113 when rotating downward.

[0100] In some specific embodiments, the cloth pushing head 113 is installed at the front end of the material spreading body 11 through a rotating shaft, and the axis of the rotating shaft extends laterally in a direction perpendicular to the feeding direction of the material spreading body 11, and the limiting structure includes a first limiting structure for limiting the upper limit position of the upward rotation of the cloth pushing head 113, and the first limiting structure limits the cloth pushing head 113 to the first position, and a second limiting structure for limiting the lower limit position of the downward rotation of the cloth pushing head 113, and the second limiting structure limits the cloth pushing head 113 to the second position.

[0101] In some possible embodiments, the limiting structure may be disposed between the rotating shaft and the bushing on the cloth pushing head 113 .

[0102] like Fig. 9 and Fig.10 As shown, in some other possible embodiments, the front end surface of the material laying body 11 can be limited by the rotation of the cloth pushing head 113. Specifically, the rotating shaft can be set between the middle part of the front end surface of the material laying body 11 and the cloth pushing head 113, and a gap for the cloth pushing head 113 to rotate is set between the cloth pushing head 113 and the material laying body 11. When the cloth pushing head 113 rotates to the first position, the upper end of the cloth pushing head 113 on the side close to the material laying body 11 abuts against the front end of the material laying body 11, and when the cloth pushing head 113 rotates to the second position, the lower end of the cloth pushing head 113 on the side close to the material laying body 11 abuts against the front end of the material laying body 11.

[0103] Preferably, in this embodiment, the upper edge of the front end of the material spreading body 11 and / or the upper edge of the first end of the cloth pushing head are provided with arc-shaped chamfers to avoid scratching the filter cloth.

[0104] In this embodiment, the elastic member used to drive the cloth pushing head 113 to rotate toward the first position may be a torsion spring.

[0105] Preferably, in this embodiment, the top of the working end of the first cloth pressing assembly 5 is substantially flush with the bottom of the second end of the cloth pushing head 113, so that the filter cloth 71 below the material spreading body 11 can be substantially level.

[0106] Specifically, when the working end of the first cloth pressing assembly 5 presses the filter cloth 71 on the first side of the filter cylinder 2 onto the filter cylinder 2, the top of the working end of the first cloth pressing assembly 5 is slightly lower than the bottom of the second end of the cloth pushing head 113, allowing the cloth pushing head 113 to pass smoothly.

[0107] Preferably, in this embodiment, the height difference between the bottom of the second end of the cloth pushing head 113 and the top of the working end of the first cloth pressing assembly 5 is greater than or equal to the thickness of the filter cloth 71 .

[0108] Preferably, in this embodiment, the material spreading opening 1121 is arranged at the bottom of the material spreading body 11, close to the front end of the material spreading body 11, that is, the material spreading opening 1121 is arranged close to the cloth pushing head 113, so that the material can be spread all over the filter cloth 71 below, making the structure compact.

[0109] In this embodiment, a sludge dewatering device is also provided, which includes a filter cylinder 2 and the above-mentioned cloth pushing and spreading device 1 installed on one side of the top of the filter cylinder 2. The spreading body 11 of the cloth pushing and spreading device 1 reciprocates above the filter cylinder 2, laying the filter cloth 71 in layers in the filter cylinder 2 and spraying material onto the filter cloth 71.

[0110] Specifically, the material spreading body 11 sprays the material onto the filter cloth 71 during the feeding process, and stops spraying the material onto the filter cloth 71 during the retreat process.

[0111] Preferably, the moving speed of the paving body 11 retreating is greater than or equal to the moving speed of the paving body 11 advancing.

[0112] Preferably, in this embodiment, the paving body 11 extends in a horizontal direction.

[0113] Preferably, in the present embodiment, a notch is provided in the middle portion of the second end of the cloth pushing head 113, which is adapted to the shape of the working end of the second cloth pressing assembly arranged on the side of the filter cylinder 2 away from the cloth pushing and spreading device, so that the working end of the second cloth pressing assembly can pass through to press the filter cloth 71 covered on the second end of the cloth pushing head 113 onto the filter cylinder 2.

[0114] Specifically, the notch 1135 passes through the cloth pushing head 113 along the vertical direction perpendicular to the first end to the second end of the cloth pushing head 113, and the opening of the notch 1135 faces the direction away from the first end of the cloth pushing head 113; preferably, a second cloth pressing assembly is arranged on the side of the filter cylinder 2 away from the cloth pushing and spreading device; along the horizontal direction perpendicular to the first end to the second end of the cloth pushing head 113, the width of the working end of the second cloth pressing assembly is smaller than the width of the notch 1135; the working end of the second cloth pressing assembly passes through the notch 1135 from top to bottom, and presses the filter cloth 71 covered on the second end of the cloth pushing head 113 against the filter cylinder 2.

[0115] In this embodiment, when the material spreading body reaches the second side of the filter cylinder 2, that is, when the cloth pushing head 113 reaches the second side of the filter cylinder 2, the working end of the second cloth pressing assembly 6 passes through the notch from top to bottom and presses the bent part of the filter cloth against the filter cylinder.

[0116] By setting, the thickness of the cloth pushing head 113 in the direction perpendicular to the first end to the second end gradually decreases from the first end to the second end, which can facilitate the working end of the second cloth pressing assembly 6 to pass through the notch, press the filter cloth, and improve the smoothness of the cloth pressing.

[0117] In the present embodiment, a material laying pipe is arranged in the shell of the material laying main body 11, and the material laying pipe includes a variable diameter section and an output section respectively having channels, and a material laying port is arranged at the second end of the output section, and the second end of the variable diameter section is connected with the first end of the output section, so that the variable diameter section channel is connected with the output section channel; the channel of the output section has the same cross-section perpendicular to the forward direction of the material, and the bottom surface of the output section bearing the material is a plane; the cross-sectional area of ​​the variable diameter section channel at the second end is less than or equal to the cross-sectional area at the first end, and the vertical cross-sectional area of ​​the output section channel is the same as the vertical cross-sectional area of ​​the variable diameter section channel at the second end; wherein, in the horizontal direction perpendicular to the material flow direction, the width of the second end of the variable diameter section channel is greater than the width of the first end; in the vertical direction perpendicular to the material flow direction, the height of the second end of the variable diameter section channel is less than the height of the first end.

[0118] The device can spread water-containing materials (such as sludge) on the filter cloth more evenly.

[0119] Embodiment 2

[0120] The sludge dewatering equipment is generally provided with a discharge collecting hopper 3 for collecting dehydrated materials between the cloth pushing and spreading device 1 and the filter cylinder 2. During the process of cloth pushing and spreading, the cloth pushing and spreading device 1 needs to be able to move forward at least the sum of the lengths of the space above the discharge collecting hopper 3 and the space above the filter cylinder 2. During the process of cloth pushing and spreading, the driving device 13 first drives the cloth pushing and spreading device 1 to extend to be aligned with the edge of the filter cylinder 2, and then drives the cloth pushing and spreading device 1 to reciprocate above the filter cylinder 2. During this process, the driving device 13 of the cloth pushing and spreading device 1 always maintains a large elongated length, which is not conducive to ensuring the smooth movement of the cloth pushing and spreading device 1. The poor smoothness of the movement of the cloth pushing and spreading device 1 will directly lead to uneven spreading of the material.

[0121] In the above scheme, the cloth pushing and material spreading process is a process in which the cloth pushing and material spreading device 1 moves back and forth between the first side and the second side of the filter cylinder 2 to fold the filter cloth 71 and spray the material to be processed onto the filter cloth 71 .

[0122] like Figures 1 to 15 As shown, in the embodiment of the present invention, a water-containing material dehydration device is introduced, and in some specific embodiments, it can be a sludge dehydration device.

[0123] The water-containing material dehydration equipment includes a frame 4, and a cloth-pushing and spreading device 1 installed on the frame 4, and the cloth-pushing and spreading device 1 includes a base 12 and a spreading body 11 installed on the base 12. The base 12 is installed on the frame 4 through a first guide component 17, and the spreading body 11 is installed on the base 12 through a second guide component 18. One end of the driving device 13 is connected to the base 12, and the other end is connected to the spreading body 11. The spreading body 11 of the cloth-pushing and spreading device 1 preferably adopts any technical solution of the spreading body 11 described in the first embodiment.

[0124] Thus, before pushing the cloth and spreading the material, the base 12 can be driven to carry the paving body 11 to move along the first guide assembly 17 and approach the filter cylinder 2. In the process of pushing the cloth and spreading the material, the driving device 13 only needs to drive the paving body 11 to reciprocate above the filter cylinder 2. The extension length of the driving device 13 is maintained in a smaller range, which is beneficial to ensure the smoothness of the reciprocating motion of the paving body 11 and can improve the efficiency and control accuracy of pushing the cloth and spreading the material. At the same time, the driving device 13 with a small stroke can be used to drive the paving body 11, which is beneficial to reduce the cost of the equipment.

[0125] In this embodiment, the cloth pushing and spreading process is a process in which the spreading body 11 of the cloth pushing and spreading device 1 moves back and forth between the first side and the second side of the filter cylinder 2 to fold the filter cloth 71 and spray the material to be processed onto the filter cloth 71.

[0126] In this embodiment, the extension direction of the first guide component 17 can be the same as the extension direction of the second guide component 18, or can be different from the extension direction of the second guide component 18. Specifically, it can be set according to the relative position relationship between the cloth pushing and spreading device 1 and the filter cylinder 2.

[0127] Specifically, the extension direction of the first guide assembly 17 is parallel to the extension direction of the second guide assembly 18. When the base 12 moves along the first guide assembly 17, the front end of the cloth-pushing body of the cloth-pushing and spreading device 1 and the first side of the filter cylinder 2 approach each other and are always aligned. Alternatively, the extension direction of the first guide assembly 17 and the extension direction of the second guide assembly 18 are set at an angle. When the base 12 moves along the first guide assembly 17, the front end of the cloth-pushing body of the cloth-pushing and spreading device 1 and the first side of the filter cylinder 2 approach each other and are gradually aligned.

[0128] In this embodiment, the first guide assembly 17 and the second guide assembly 18 may be a sliding guide rail structure or a rolling guide rail structure.

[0129] In some specific embodiments, the second guide assembly 18 is a sliding guide rail structure, which is arranged on one side or both sides of the feeding direction of the material paving body 11.

[0130] The second guide assembly 18 includes a second rail 181 and a slider 182 sleeved on the second rail 181 .

[0131] In this embodiment, the second track 181 is arranged on one side or both sides of the feeding direction of the material paving body 11, and the slider 182 is arranged on the base 12 corresponding to the second track 181; or, the second track 181 is on the base 12 on one side or both sides of the feeding direction of the material paving body 11, and the slider 182 is arranged on the material paving body 11 corresponding to the second track 181; or, the second track 181 is arranged on one side of the feeding direction of the material paving body 11, and the slider 182 is arranged on the other side of the feeding direction of the material paving body 11, and the base 12 is provided with a slider 182 and a second track 181 that respectively cooperate with the second track 181 and the slider 182 on the material paving body 11.

[0132] Preferably, in the present embodiment, two groups of the sliding guide rail structures are provided, which are respectively arranged between the left and right sides of the material paving body 11 and the top of the base 12 .

[0133] Specifically, in this embodiment, the sliding guide structure includes a second track 181, and a slider 182 installed on the second track 181 and sliding back and forth along the second track 181. The second track 181 can be arranged on the left and right sides of the material laying body 11 and / or on the base 12, and the slider 182 is arranged on the base 12 and / or on the left and right sides of the material laying body 11 corresponding to the second track 181, and is sleeved on the second track 181.

[0134] That is, the second track 181 can be set on the base 12 and the slider 182 can be set on the paving body 11, or the slider 182 can be set on the base 12 and the second track 181 can be set on the paving body 11. The second track 181 on one side of the paving body 11 can also be set on the base 12, and the slider 182 can be correspondingly set on the paving body 11, and the second track 181 on the other side of the paving body 11 can be set on the paving body 11, and the slider 182 can be correspondingly set on the base 12.

[0135] Preferably, in this embodiment, the second track 181 is disposed on the base 12 , and the slider 182 is disposed on the paving body 11 .

[0136] Specifically, Figure 4 and Figure 5As shown, in this embodiment, the extension length of the base 12 along the feeding direction perpendicular to the material paving body 11 is greater than the extension length of the material paving body 11 along the feeding direction perpendicular to the material paving body 11, the first track 171 is installed on the top of the base 12, and the two first tracks 171 are respectively arranged on both sides of the material paving body 11. The two sides of the material paving body 11 are respectively provided with sliders 182 extending outwards, and the sliders 182 are respectively sleeved on the corresponding first tracks 171. Through the above arrangement, the material paving body 11 and the base 12 can always maintain a high degree of parallelism, and avoid the situation where the front end of the material paving body 11 tilts downward during the forward feeding process.

[0137] In this embodiment, the feeding direction of the material paving body 11 is the extending direction of the second guide assembly 18 .

[0138] Preferably, in this embodiment, the material spreading body 11 extends in the horizontal direction, the top surface of the base 12 is set as a horizontal plane, and the material spreading body 11 and the top surface of the base 12 are close to each other. Thus, the compactness of the structure of the cloth pushing material spreading device 1 can be improved. The sliding guide structure is arranged between the left and right sides of the material spreading body 11 and the base 12, which can facilitate the fitting of the material spreading body 11 and the base 12.

[0139] Preferably, in this embodiment, the fixed end of the driving device 13 is disposed on the base 12 , and the movable end is connected to the slider 182 .

[0140] In some specific embodiments, the shell 111 of the paving body 11 is configured as a rectangular parallelepiped structure, the slider 182 extends outward from the left and right side walls of the shell 111, the second track 181 is configured as a columnar shape, and the slider 182 is provided with a through hole adapted to the second track 181, and the slider 182 is mounted on the second track 181 through the through hole.

[0141] The driving devices 13 are provided with two groups parallel to the extension direction of the sliding guide rail structure. The two groups of driving devices 13 act synchronously. The fixed end of the driving device 13 is set on the base 12, and the movable ends of the two driving devices 13 are respectively connected to the two sliders 182.

[0142] Preferably, the fixed end of the driving device 13 is arranged on the base 12 behind the slider 182, and the movable end of the driving device 13 is connected to the slider 182. Preferably, the end of the slider 182 away from the fixed end of the driving device 13, that is, the front end of the slider 182 is provided with a first driving portion 183 protruding and extending in a direction away from the material paving body 11, and the movable end of the driving device 13 is connected to the first driving portion 183.

[0143] Through the above-mentioned arrangement, it can be ensured that both sides of the paving body 11 can be subjected to force synchronously, thereby ensuring the smooth movement of the paving body 11. At the same time, by arranging the driving device 13 to act directly on the slider 182, the driving device 13 and the sliding guide rail structure are arranged adjacent to each other, thereby further avoiding the jamming of the sliding guide rail structure and further improving the smoothness of driving the paving body 11.

[0144] In this embodiment, the driving device 13 can be any one of a hydraulic cylinder, a pneumatic cylinder, and a linear motor, or a combination of two or more thereof.

[0145] Preferably, in this embodiment, the driving device 13 is preferably a hydraulic cylinder.

[0146] In some specific embodiments, the first guide assembly 17 is a rolling guide rail structure, and the rolling guide rail structure includes a first rail 171 and a roller 172 adapted to the first rail 171 .

[0147] Specifically, Fig.14 and Fig.15 As shown, in this embodiment, the first track 171 is arranged on the frame 4, and a groove 1711 is provided on the top of the first track 171. The roller 172 is installed on the bottom of the base 12 through a rotating shaft. The roller 172 is arranged in the groove 1711 of the first track 171, and the peripheral wall of the roller 172 abuts against the inner wall of the groove 1711. The groove 1711 limits the roller 172 in the groove 1711.

[0148] In some possible embodiments, the cross-sectional shape of the bottom of the groove 1711 is the same as the cross-sectional shape of the outer peripheral wall of the roller 172 .

[0149] In some possible embodiments, the cross-sectional shape of the outer peripheral wall of the roller 172 is the same as the cross-sectional shape of the groove 1711 .

[0150] In some specific embodiments, the bottom of the groove 1711 is set to be flat, or to be set to be a shape that bulges upward in the middle along the length direction of the groove 1711, or to be set to be a shape that is concave downward in the middle along the length direction of the groove 1711. The outer peripheral wall of the roller 172 is fitted with the bottom of the groove 1711, and the groove wall of the groove 1711 extends upward and toward the outside of the groove 1711, thereby enhancing the limiting effect on the roller 172.

[0151] Preferably, in this embodiment, the rolling guide rail structure is provided with at least two groups arranged at intervals perpendicular to the extension direction thereof to ensure the support stability of the base 12 .

[0152] Preferably, in this embodiment, the rolling guide rail structure is provided with two groups, which are respectively arranged on the left and right sides of the bottom of the base 12 and between the frame 4, and each group of rolling guide rail structures is respectively provided with at least two rollers 172 arranged at intervals along the extension direction of the first track 171 to further improve the support stability of the base 12.

[0153] In this embodiment, the filter cylinder 2 is arranged on the extension path of the first guide assembly 17 and is separated from the cloth pushing and spreading device 1; limiting parts 1712 for limiting the roller 172 are provided at both ends of the first track 171, and the distance between the roller 172 and the limiting part 1712 at the front end of the first track 171 is less than or equal to the distance between the spreading body 11 and the filter cylinder 2.

[0154] Specifically, when the roller 172 abuts against the limiting portion 1712 at the front end of the first rail 171, the front end of the paving body 11 on the base 12 is aligned with the filter cylinder 2, so that the extension path of the second guide assembly 18 corresponds to the filter cylinder 2, and the front end of the paving body 11 extends at most to align with the outer edge of the first side of the filter cylinder 2.

[0155] Preferably, in this embodiment, when the roller 172 abuts against the limiting portion 1712 at the rear end of the first track 171 , the cloth pushing and spreading device 1 avoids at least a portion of the space above the discharge collecting hopper 3 .

[0156] Preferably, in this embodiment, when the roller 172 abuts against the limiting portion 1712 at the rear end of the first track 171 , the front end of the base 12 corresponds to the upper edge of the side of the discharge collecting hopper 3 away from the filter cylinder 2 .

[0157] In this embodiment, when each group of first guide components 17 is provided with multiple rollers 172, the rollers 172 abut against the limiting portion 1712 at the front end of the first rail 171, specifically, the rollers 172 arranged at the front end abut against the limiting portion 1712 at the front end of the first rail 171, and the rollers 172 abut against the limiting portion 1712 at the rear end of the first rail 171, specifically, the rollers 172 arranged at the rear end abut against the limiting portion 1712 at the rear end of the first rail 171.

[0158] In this embodiment, a front drive device 14 parallel to the extension direction of the rolling guide rail structure is arranged between the frame 4 and the base 12, and the front drive device 14 is used to drive the base 12 to reciprocate, that is, the front drive device 14 is used to drive the cloth pushing and spreading device 1 as a whole to reciprocate along the rolling guide rail structure.

[0159] In this embodiment, the fixed end of the front drive device 14 is arranged on the frame 4 , and the movable end is connected to the base 12 .

[0160] In some preferred embodiments, the front drive device 14 is provided with two groups, the two groups of front drive devices 14 act synchronously, and the two groups of front drive devices 14 are respectively arranged between the left and right sides of the base 12 and the frame 4. Thus, it can be ensured that the two sides of the base 12 can be subjected to force synchronously, and the smoothness of the movement of the base 12 is ensured.

[0161] Preferably, in this embodiment, the movable end of the front drive device 14 is connected to the middle of both sides of the base 12. Specifically, the middle of both sides of the base 12 is provided with a second drive part 121 extending outward, and the movable end of the front drive device 14 is connected to the second drive part 121.

[0162] Preferably, in this embodiment, the front driving device 14 and the first track 171 are arranged close to each other and in parallel.

[0163] In this embodiment, the front drive device 14 can be any one of a hydraulic cylinder, a pneumatic cylinder, and a linear motor, or a combination of two or more thereof.

[0164] Preferably, in this embodiment, the driving device 13 is preferably a hydraulic cylinder.

[0165] Preferably, in this embodiment, the extension direction of the first guide component 17 is parallel to the extension direction of the second guide component 18, and when the base 12 and the paving body 11 are moving, the front end of the paving body 11 always corresponds to the first side of the filter cylinder 2.

[0166] In some specific embodiments, a material laying pipe 112 is provided inside the material laying body 11, and a material delivery pipe 15 connected to the material laying pipe 112 is provided outside the material laying body 11. The material delivery pipe 15 is connected to the material laying pipe 112 and is used to deliver materials to the material laying body 11. In order to adapt to the reciprocating motion of the material laying body 11, the material delivery pipe 15 is generally set as a hose. By setting the material delivery pipe as a hose, the material delivery pipe can move forward and backward with the base and the material laying body, and there is no need to install an additional pipe shaft with a steering function like a hard pipe. The complexity of the device is greatly reduced and the durability is improved.

[0167] In this embodiment, a clearance opening for evading the material delivery pipe 15 is provided at the rear end of the base 12 corresponding to the material delivery pipe 15 .

[0168] In this embodiment, the material laying body 11 includes a shell 111 and a material laying pipe 112 installed in the shell 111. The rear end of the material laying pipe 112 is connected to the rear side wall of the shell 111. The material laying pipe 112 is provided with a plurality of material laying pipes 112 arranged at intervals along a feeding direction perpendicular to the material laying body 11, and each of the material laying pipes 112 is respectively connected to a material delivery pipe 15.

[0169] The avoidance opening is arranged at the rear end of the base 12, corresponding to the material delivery pipe 15, and the extension length of the avoidance opening along the feeding direction perpendicular to the material paving body 11 is greater than or equal to the layout range of the material delivery pipe 15 at the rear end of the material paving body 11. By setting the avoidance opening, the smoothness of the reciprocating movement of the material paving body 11 can be further ensured.

[0170] In the present embodiment, a material spreading method for the above-mentioned water-containing material dehydration equipment is also provided. When spreading the material, the cloth pushing and spreading device 1 is first controlled to move along the first guide component 17 to the edge close to the top of the filter cylinder 2; then the material spreading body 11 is driven to reciprocate above the filter cylinder 2 along the second guide component 18, so that the filter cloth 71 is stacked and laid in the filter cylinder 2 and the material is sprayed onto the filter cloth 71.

[0171] Specifically, when it is necessary to spread material on the filter cloth 71, the cloth pushing and spreading device 1 is first driven forward as a whole by the front drive device 14, so that the cloth pushing and spreading device 1 is close to the filter cylinder 2, and the front end of the spreading body 11 on the base 12 is exactly corresponding to the first side of the filter cylinder 2, that is, the front end of the spreading body 11 is parallel to the first side of the filter cylinder 2, and the front end of the spreading body 11 corresponds to the middle of the first side of the filter cylinder 2. At this time, the spreading body 11 is in the retracted position, and the driving device 13 of the spreading body 11 is in the initial position. Then, the driving device 13 of the spreading body 11 drives the spreading body 11 to reciprocate between the first side and the second side of the filter cylinder 2, so that the filter cloth 71 is stacked in the filter cylinder 2, and in this process, the material is spread between two adjacent layers of filter cloth 71.

[0172] Preferably, in the present embodiment, a cloth pushing head 113 is provided at the front end of the material spreading body 11, and the cloth pushing head 113 extends forward and downward obliquely from the front end face of the material spreading body 11, and the extension length of the cloth pushing head 113 along the feeding direction perpendicular to the material spreading body 11 is greater than or equal to the length of the front end face of the material spreading body 11, and the front end of the cloth pushing head 113 extends to a material spreading opening 1121 lower than the material spreading body 11.

[0173] In this embodiment, when the roller 172 abuts against the limiting portion 1712 at the rear end of the first track 171, the cloth pushing head 113 is placed outside the base 12, which can ensure that the material spreading body 11 and the base 12 are compact while avoiding interference between the cloth pushing head 113 and the base 12.

[0174] Embodiment 3

[0175] The cloth pushing and spreading device 1 of the sludge dewatering equipment in the prior art directly uses the spreading port 1121 to press against the filter cloth 71, which is equivalent to using the spreading pipe 112 to press against the filter cloth 71. In the process of pushing the filter cloth 71, the material is spread on the filter cloth 71, which easily causes the material to stick to the filter cloth 71 and the cloth pushing and spreading device 1.

[0176] like Figures 1 to 15 As shown, based on the first embodiment, the structure of a spreading body 11 of a cloth pushing and spreading device 1 of a sludge dewatering equipment is further introduced.

[0177] The cloth pushing and spreading device 1 includes a spreading body 11, which includes a shell 111 and a spreading pipe 112 installed in the shell 111. An opening is provided at the bottom of the shell 111, and the spreading pipe 112 is installed in the shell 111. The spreading port 1121 of the spreading pipe 112 is provided in the opening.

[0178] By setting up the shell 111, the material laying pipe 112 can be covered in the shell 111. During the feeding process of the material laying body 11, the shell 111 is used to push the cloth so that the material laying pipe 112 will not directly contact the filter cloth 71, thereby ensuring the uniformity of the material output by the material laying pipe 112 and improving the paving effect of the filter cloth 71.

[0179] In some specific embodiments, the material spreading opening 1121 extends vertically downward from the opening, at least to the level with the bottom of the opening. Preferably, the material spreading opening 1121 at least partially extends below the opening, that is, the height of the material spreading opening 1121 is lower than the opening. Thus, it is possible to prevent the shell 111 from obstructing the output of materials at the material spreading opening 1121, and it is possible to prevent the bottom of the shell 111 from adhering to the materials output from the material spreading pipe 112.

[0180] In this embodiment, the opening extends in a direction perpendicular to the feeding direction of the material laying body 11 , the material laying pipe 112 extends along the feeding direction of the material laying body 11 , and the material laying port 1121 of the material laying pipe 112 bends and extends downward from the opening.

[0181] Specifically, the bottom wall of the shell 111 can extend in a horizontal direction, or can extend obliquely upward or downward along the feeding direction of the material laying body 11, and the opening on the bottom wall of the shell 111 extends horizontally in a direction perpendicular to the feeding direction of the material laying body 11, and the material laying pipe 112 extends in the shell 111 in a direction parallel to the bottom wall of the shell 111, and the material laying port 1121 of the material laying pipe 112 bends vertically downward from the opening and extends through the opening to below the opening.

[0182] Preferably, in this embodiment, a plurality of the material laying pipes 112 are arranged along a feeding direction perpendicular to the material laying body 11. By providing a plurality of material laying pipes 112 to lay materials, it is helpful to improve the uniformity of material spreading.

[0183] In some possible embodiments, a plurality of openings corresponding to the material laying openings 1121 of each material laying pipe 112 are provided on the bottom wall of the shell 111 , and the material laying openings 1121 of each material laying pipe 112 are respectively installed in the corresponding openings.

[0184] Preferably, the openings are arranged perpendicular to the feeding direction of the paving body 11, and two adjacent openings are closely adjacent to each other, so as to further improve the uniformity of the paving material.

[0185] In some other possible embodiments, the opening is a strip-shaped opening extending perpendicular to the feeding direction of the material laying body 11 , and the material laying openings 1121 of each material laying pipe 112 are arranged side by side in the strip-shaped opening.

[0186] In this embodiment, the opening extends along the feeding direction perpendicular to the material laying main body 11, and the material laying openings 1121 of each material laying pipe 112 are arranged along the length direction of the opening. The material laying openings 1121 of each material laying pipe 112 have the same width along the feeding direction of the material laying main body 11, and, along the feeding direction perpendicular to the material laying main body 11, the discharge openings of each material laying pipe 112 are aligned with each other.

[0187] Preferably, in this embodiment, the types of the material laying pipes 112 are the same, and the shapes of the material outlets of the material laying pipes 112 are the same.

[0188] Preferably, in this embodiment, the material laying opening 1121 extends in a horizontal direction.

[0189] Preferably, in this embodiment, the interval between two adjacent material laying openings 1121 is very small, specifically, the material laying openings 1121 of two adjacent material laying openings 1121 are close to each other, and the thickness of the tube wall between the two adjacent material laying openings 1121 is relatively small. Specifically, the thickness of the tube wall at both ends of the material laying openings 1121 of the material laying tube 112 along the feeding direction perpendicular to the material laying body 11 is less than or equal to the closed thickness of both ends along the feeding direction of the material laying body 11.

[0190] In some possible embodiments, the material laying pipe 112 includes an input section 1122, a diameter-reducing section 1123, and an output section 1124 sequentially arranged along the feeding direction of the material laying body 11, the output section 1124 is arranged to be flat, and the material laying port 1121 is bent and extended downward from the end of the output section 1124. Through the above arrangement, the material conveyed in the material laying pipe 112 gradually extends in a direction perpendicular to the feeding direction of the material laying body 11 during the conveying process, and gradually becomes thinner, that is, under the action of the pipe wall of the material laying pipe 112, the material gradually becomes thinner and wider, so that the material laying port 1121 can finally output a thin layer of material, so that the material is evenly laid on the filter cloth 71.

[0191] Preferably, the extension length of the opening is less than or equal to the width of the filter cloth 71 .

[0192] Further preferably, the output sections 1124 of two adjacent material laying pipes 112 fit together, and the total extension length of the output sections 1124 of each material laying pipe 112 along the feeding direction perpendicular to the material laying body 11 is less than or equal to the width of the filter cloth 71 .

[0193] Preferably, the extension direction of the output section 1124 is parallel to the bottom wall of the shell 111 .

[0194] The existing material laying pipe has the problem of uneven material discharge. The thickness of the material laid on the filter cloth is uneven. Some parts of the filter cloth have thicker materials, while some parts have almost no materials or the material thickness is relatively thin. Therefore, additional components are required to scrape the materials on the filter cloth flat; or the uneven multi-layer materials are directly squeezed, resulting in poor solid-liquid separation effect.

[0195] In some preferred embodiments, the material laying pipe 112 includes a reducing section 1123 and an output section 1124, each of which has a channel. The second end of the output section 1124 is provided with a material laying port 1121. The second end of the reducing section 1123 is connected to the first end of the output section 1124, so that the channel of the reducing section 1123 is connected to the channel of the output section 1124; the channel of the output section 1124 has the same cross-section perpendicular to the forward direction of the material, and the bottom surface of the output section 1124 that supports the material is a plane; the cross-sectional area of ​​the channel of the reducing section 1123 at the second end is smaller than the cross-sectional area at the first end, and the vertical cross-sectional area of ​​the channel of the output section 1124 is the same as the vertical cross-sectional area of ​​the channel of the reducing section 1123 at the second end.

[0196] The first end of the variable diameter section 1123 is connected to the channel of the input section 1122 for conveying materials. The material from the input section 1122 enters the output section 1124 from the end of the variable diameter section 1123 with a larger vertical cross-sectional area. The change in the vertical cross-sectional area of ​​the channel of the output section 1124 exerts a pressurizing effect in the channel of the output section 1124, and the material is distributed more widely in the horizontal direction perpendicular to the flow of the material in the output section 1124 (i.e., the width of the channel). After flowing into the output section 1124 from the end of the variable diameter section 1123 with a smaller vertical cross-sectional area, the material is further distributed more widely horizontally in the channel of the output section 1124, and can occupy the entire channel of the output section 1124, and evenly flows out from the material laying port 1121 of the output section 1124 and is laid on the filter cloth.

[0197] In some embodiments, in the horizontal direction perpendicular to the material flow direction, the width of the second end of the channel of the diameter-reducing section 1123 is greater than the width of the first end.

[0198] In the vertical direction perpendicular to the material flow direction, the height of the second end of the channel of the diameter-changing section 1123 is smaller than the height of the first end.

[0199] In an optional solution, the width of the passage of the diameter-changing section 1123 gradually increases from the first end to the second end, and the height of the passage of the diameter-changing section 1123 gradually decreases from the first end to the second end.

[0200] By setting the channel structure of the variable diameter section 1123, the material enters the channel through the first end of the variable diameter section 1123. During the forward process, the pressure gradually increases, and the material occupies the variable diameter section 1123 and is continuously dispersed from the center position to both sides.

[0201] In an optional solution, the vertical cross section of the channel at the first end of the reducing section 1123 can be circular, quasi-circular, polygonal, elliptical, etc. In consideration of the convenience of processing and assembly, in a more preferred solution, the vertical cross section of the channel at the first end of the reducing section 1123 can be circular or quasi-circular.

[0202] The width direction of the vertical cross section of the channel of the diameter-reducing section 1123 at the second end is a polygon with straight lines. Preferably, it can be a polygon with parallel upper and lower sides, such as a parallelogram, a rectangle, etc.

[0203] In some embodiments, the cross-sectional area of ​​the channel of the reducing section 1123 at the second end is 0.7-1.0 times the cross-sectional area of ​​the first end.

[0204] In some embodiments, the ratio of the length of the reducing section 1123 in the material flow direction to the width of the channel of the reducing section 1123 at the second end is 1:0.6-1:3.

[0205] The width of the second end of the variable diameter section 1123 refers to the length of the channel of the output section 1124 in the horizontal direction perpendicular to the material flow direction.

[0206] The length of the diameter-reducing section 1123 refers to the length between the first end and the second end.

[0207] In certain embodiments, in the material flow direction, the ratio of the length L1 of the diameter-reducing section 1123 to the length L2 of the output section 1124 is 1:0.5-1:8.

[0208] The vertical cross section of the channel of the output section 1124 is a polygon with straight lines in the width direction. Preferably, it can be a polygon with parallel upper and lower sides; more preferably, the structures on both sides between the top and bottom surfaces of the channel of the output section 1124 are symmetrically arranged.

[0209] For example, the vertical cross section of the channel of the output section 1124 may be a rectangle, etc. That is, the channel of the output section 1124 and the channel of the reducing section 1123 have the same shape of the vertical cross section at the second end.

[0210] The material discharged from the second end of the variable diameter section 1123 flows into the channel of the output section 1124 toward the two side walls in the width direction, and can be continuously dispersed throughout the bottom of the channel of the output section 1124 and flow out evenly through the outlet of the output section 1124.

[0211] The upper end of the material paving opening 1121 is set to be an arc shape smoothly connected to the output section, and the material paving opening 1121 is downward. The lower end of the material paving opening 1121 is set to have a vertical cross-section that is the same as the vertical cross-section of the output section channel, preferably a rectangle.

[0212] The diameter-reducing section 1123 and the output section 1124 of this embodiment may be arranged in one piece or in separate pieces.

[0213] Through the material laying pipe 112 of this embodiment, the material flowing in from the first end of the variable diameter section 1123 can flow out through the material laying port 1121 evenly and continuously after passing through the channels of the first and second components, and be evenly and continuously distributed on the filter cloth. On the filter cloth, the thickness of the laid material is relatively uniform, or the surface of the material is relatively flat, and no additional steps or parts are required to flatten the laid material. Therefore, a good solid-liquid separation effect can be achieved while saving process or reducing parts.

[0214] In some specific embodiments, the material laying pipe 112 is installed on the rear side wall of the shell 111 ; the opening is arranged on the bottom wall of the shell 111 , close to the front side wall of the shell 111 .

[0215] In this embodiment, the shell 111 is preferably a horizontally extending rectangular parallelepiped structure. Of course, it can also be other structures with a cavity. The above-mentioned laying pipe 112 is placed in the cavity inside the shell.

[0216] Specifically, the material laying pipe 112 can be welded to the shell 111, or the material laying pipe 112 and the shell 111 can be set to be detachably connected. It only needs to ensure that no relative movement occurs between the material laying pipe 112 and the shell 111 during the feeding process of the material laying body 11.

[0217] Preferably, Figures 11 to 13 As shown, in this embodiment, a mounting joint 16 is provided on the rear side wall of the shell 111, and the mounting joint 16 is fixed on the rear side wall of the shell 111. The mounting joint 16 at least partially extends into the shell 111, and the input section 1122 of the material laying pipe 112 is sealedly connected to the mounting joint 16.

[0218] Specifically, the mounting joint 16 includes a first mounting member 161 arranged inside the shell 111 and a second mounting member 162 arranged outside the shell 111. The first mounting member 161 and the second mounting member 162 are connected and clamped on the rear side wall of the shell 111. The material laying pipe 112 and the first mounting member 161 are plugged or socketed together, and a sealing structure is arranged at the connection between the material laying pipe 112 and the first mounting member 161.

[0219] In some specific embodiments, the first mounting member 161 is arranged on the inner side of the rear side wall, is cylindrical, has a radial protrusion 1611 in the middle, a plug connector 1612 is coaxially arranged on one side of the radial protrusion 1611, the material laying pipe 112 is sleeved on the plug connector 1612, and a thread head 1613 is coaxially arranged on the other side of the radial protrusion 1611, the thread head 1613 penetrates the rear side wall and at least partially extends to the outside of the rear side wall. The second mounting member 162 is arranged on the outside of the rear side wall, is cylindrical, and an internal thread matching the thread head 1613 is arranged on the inner peripheral wall of the second mounting member 162, the second mounting member 162 is tightened on the thread head 1613, and the rear side wall is at least partially sandwiched between the radial protrusion 1611 and the second mounting member 162.

[0220] In some possible embodiments, the outer peripheral wall of the radial protrusion 1611 is at least partially configured as a plane, and the radial protrusion 1611 abuts against the top and / or bottom wall of the shell 111 through the plane to achieve circumferential positioning between the first mounting member 161 and the rear side wall of the shell 111.

[0221] Preferably, in this embodiment, the material laying pipe 112 is interference fit with the plug connector 1612 of the first mounting member 161. Preferably, the material laying pipe 112 is sleeved on the plug connector 1612, and the end of the material laying pipe 112 abuts against the radial protrusion 1611, and a sealing ring is provided at the overlap of the material laying pipe 112 and the plug connector 1612 to ensure the sealing effect between the two.

[0222] Specifically, a sealing groove may be provided on the outer peripheral wall of the plug connector 1612 , a sealing ring may be provided in the sealing groove, and an outer diameter of the sealing ring may be larger than an outer diameter of the plug connector 1612 , and the sealing ring may be elastically abutted against the inner peripheral wall of the material laying pipe 112 .

[0223] In some specific embodiments, the mounting joint 16 further includes a connecting pipe 163, which is disposed outside the housing 111. The connecting pipe 163 is disposed at one end of the second mounting member 162 away from the housing 111, the first mounting member 161 is sleeved on the connecting pipe 163 and axially limitedly engaged with the connecting pipe 163, and the end of the connecting pipe 163 is at least partially inserted into the first mounting member 161.

[0224] Specifically, the end of the connecting tube 163 is provided with a first limiting protrusion protruding radially outward, the second mounting member 162 is sleeved on the outer periphery of the connecting tube 163, and the end of the second mounting member 162 away from the shell 111 is provided with a second limiting protrusion protruding radially inward, the second limiting protrusion abuts against the end of the first limiting protrusion away from the shell 111, thereby realizing axial limitation between the connecting tube 163.

[0225] The second mounting member 162 is screwed onto the threaded head 1613, and the first limiting protrusion abuts against the end of the threaded head 1613. The first limiting protrusion protrudes toward the middle of one side of the threaded head 1613 and toward the direction close to the threaded head 1613, and is inserted into the threaded head 1613 to further improve the stability of the connection.

[0226] In this embodiment, one end of the connecting pipe 163 away from the housing 111 is used to connect with a hose for conveying materials.

[0227] In this embodiment, the connecting pipe 163 is hard and can be an integral structure with the hose for conveying materials, or can be a detachable structure with the hose for conveying materials.

[0228] Preferably, in some possible embodiments, a first mounting member 161 is also provided at the end of the hose for conveying materials, and a plug connector 1612 of the first mounting member 161 is inserted into the hose for conveying materials and has an interference fit with the hose for conveying materials, and a second mounting member 162 for connecting with the threaded head 1613 of the first mounting member 161 is also provided at one end of the connecting pipe 163 away from the shell 111.

[0229] Of course, the first mounting member 161 connected to the hose for conveying materials can also be provided to be injection-molded and connected to the end of the hose for conveying materials. The end of the hose for conveying materials can also be provided to be sleeved with the connecting pipe 163. It is only necessary to achieve a sealed connection.

[0230] Preferably, in this embodiment, a cloth pushing head 113 extending forward and downward at an angle is provided on the front side wall of the shell 111, and the front end of the cloth pushing head 113 extends to a position lower than a material laying opening 1121 of the material laying pipe 112; the cloth pushing head 113 and the shell 111 are configured as an integral part, or the cloth pushing head 113 and the front side wall of the shell 111 are rotatably matched.

[0231] Preferably, in the present embodiment, the cloth pushing head 113 includes a first support plate 1131 and a second support plate 1132 extending forwardly and downwardly obliquely from the upper and lower ends of the front side wall of the shell 111, respectively, and a solid cylinder 1134 connected between the front ends of the first support plate 1131 and the second support plate 1132; the angle between the first support plate 1131 and the horizontal direction is greater than the angle between the second support plate 1132 and the horizontal direction, and the front ends of the first support plate 1131 and the second support plate 1132 are tangent to the solid cylinder 1134 from the upper and lower sides of the solid cylinder 1134, respectively.

[0232] Preferably, in this embodiment, the solid column 1134 is a solid cylindrical structure. This embodiment also provides a sludge dewatering device equipped with the cloth pushing and spreading device 1, and the sludge dewatering device also includes a driving device 13 for driving the cloth pushing and spreading device 1 to perform reciprocating motion.

[0233] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A cloth spreading device for a dewatering device, comprising a spreading body (11), a spreading opening (1121) being arranged at the bottom of the spreading body (11), characterized in that: A cloth pushing head (113) extending obliquely downward is provided at the front end of the material spreading body (11), a first end of the cloth pushing head (113) is connected to the material spreading body (11), a second end opposite to the first end is lower than the first end, and the position of the second end of the cloth pushing head (113) in a direction perpendicular to the bottom of the material spreading body (11) is variable.

2. The cloth pushing and spreading device of the dewatering equipment according to claim 1, characterized in that: At least when the cloth pushing head (113) abuts against the filter cloth (71), the second end of the cloth pushing head (113) is lower than the material laying opening (1121), and the height difference between the second end of the cloth pushing head (113) and the material laying opening (1121) is greater than the thickness of the material laid on the filter cloth (71); Preferably, the material spreading opening is arranged close to the cloth pushing head.

3. The cloth pushing and spreading device of the dewatering equipment according to claim 1 or 2, characterized in that: The cloth pushing head (113) is fixed on the material spreading body (11), and at least a part of the cloth pushing head (113) is made of elastic material; or, The cloth pushing head (113) is rotatably connected to the material spreading body (11), and the cloth pushing head (113) is configured with a first position for rotating upward to an upper limit, and a second position for rotating downward to a lower limit. When the cloth pushing head (113) is in the first position and the second position, the height difference of the second end of the cloth pushing head (113) is greater than the thickness of the material spread on the filter cloth (71).

4. The cloth pushing and spreading device of the dewatering equipment according to claim 3, characterized in that: The cloth pushing head (113) is rotatably connected to the material spreading body (11); when the cloth pushing head (113) is rotated to a first position, the height of the second end of the cloth pushing head (113) is lower than the height of the rotation center of the cloth pushing head (113); an elastic member for driving the cloth pushing head (113) to rotate to the first position is provided between the cloth pushing head (113) and the material spreading body (11).

5. The cloth pushing and spreading device of the dewatering equipment according to claim 1 or 2, characterized in that: In a direction from the first end to the second end of the cloth pushing head (113), the thickness of the cloth pushing head (113) in a direction perpendicular to the direction from the first end to the second end gradually decreases.

6. The cloth pushing and spreading device of the dewatering equipment according to claim 5, characterized in that: The cross section of the second end of the cloth pushing head (113) is arranged to be an arc shape protruding in a direction away from the first end; Preferably, in a direction perpendicular to the first end to the second end of the cloth pushing head, the maximum thickness of the arc shape of the second end of the cloth pushing head is smaller than the thickness of the first end of the cloth pushing head.

7. The cloth pushing and spreading device of the dewatering equipment according to claim 6, characterized in that: The second end of the cloth pushing head (113) is a solid cylinder (1134) whose diameter is smaller than the thickness of the front end of the material spreading body (11); the solid cylinder (1134) is connected to the material spreading body (11) via a support plate extending downwardly from the front end of the material spreading body (11); and the end of the support plate away from the solid cylinder (1134) is the first end of the cloth pushing head (113).

8. The cloth pushing and spreading device of the dewatering equipment according to claim 7, characterized in that: A support plate extends obliquely from the upper side of the solid column (1134) along the tangent direction of the solid body toward the upper edge of the front end of the paving body (11); or two support plates extend obliquely from the upper and lower sides of the solid column (1134) along the tangent direction of the solid body toward the upper and lower edges of the front end of the paving body (11); The end of the support plate is smoothly connected to the outer peripheral wall of the solid column (1134).

9. The cloth pushing and spreading device of the dewatering equipment according to claim 1 or 2, characterized in that: A notch (1135) is provided in the middle of the second end of the cloth pushing head (113), the notch (1135) penetrates the cloth pushing head (113) along a vertical direction perpendicular to the first end to the second end of the cloth pushing head (113), and the opening of the notch (1135) faces a direction away from the first end of the cloth pushing head (113); Preferably, a cloth pressing assembly is provided on a side of the filter cylinder away from the cloth pushing and spreading device; along a horizontal direction perpendicular to the first end to the second end of the cloth pushing head, the width of the working end of the cloth pressing assembly is smaller than the width of the notch; Preferably, the working end of the cloth pressing assembly passes through the notch from top to bottom to press the filter cloth coated on the second end of the cloth pushing head onto the filter cylinder.

10. A dehydration device, comprising a filter cylinder (2), characterized in that: The top of the filter cylinder (2) is provided with a cloth pushing and spreading device of the dehydration equipment according to any one of claims 1 to 9, which is used to lay the filter cloth (71) in layers in the filter cylinder (2) and spray the material onto the filter cloth (71); Preferably, a material laying pipe is arranged in the shell of the material laying body (11), the material laying pipe comprises a diameter-reducing section and an output section each having a channel, a second end of the output section is provided with a material laying port, and the second end of the diameter-reducing section is connected to the first end of the output section, so that the diameter-reducing section channel is connected to the output section channel; The channels of the output section have the same cross section perpendicular to the forward direction of the material, and the bottom surface of the output section that carries the material is a plane; the cross-sectional area of ​​the channel of the variable diameter section at the second end is less than or equal to the cross-sectional area at the first end, and the vertical cross section of the channel of the output section is the same as the vertical cross section of the channel of the variable diameter section at the second end; Preferably, in the horizontal direction perpendicular to the material flow direction, the width of the second end of the variable diameter section channel is greater than the width of the first end; in the vertical direction perpendicular to the material flow direction, the height of the second end of the variable diameter section channel is less than the height of the first end.

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