Pusher and spreader for a dewatering apparatus and dewatering apparatus

Abstract

This invention provides a material spreading and feeding device for a dewatering equipment and the dewatering equipment itself. The material spreading and feeding device for the dewatering equipment includes a feeding body, which comprises: a shell with an opening at its bottom; and a feeding pipe installed inside the shell, with the feeding port of the feeding pipe located within the opening. By using a shell, this invention can enclose the feeding pipe within the shell. During the feeding process of the feeding body, the shell is used to push the material, preventing the feeding pipe from directly contacting the filter cloth. This ensures the uniformity of the material output from the feeding pipe and improves the flattening effect on the filter cloth.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, specifically relating to a cloth-pushing and spreading device for sludge dewatering equipment, and also to sludge dewatering equipment equipped with the cloth-pushing and spreading device. Background Technology

[0002] With the continuous increase in urban sewage generation, the number of corresponding sewage treatment facilities is also increasing, leading to a growing amount of sludge, a byproduct of sewage treatment. How to properly handle and dispose of this ever-increasing volume of sludge has become an urgent environmental protection issue in my country. Sludge typically has a moisture content of over 80%. Sludge dewatering is a crucial step in its treatment process. However, the difficulty in deep dewatering sludge has become a bottleneck restricting its harmless and resource-based treatment.

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

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

[0005] In existing technologies, the filter cloth is typically laid flat first, and then sludge is spread on it, resulting in low sludge spreading efficiency. To improve efficiency, Chinese utility model patent application number CN202023099235.0 discloses a fixing device for laying layered filter cloth, which spreads sludge onto the filter cloth simultaneously. Specifically, the near end of the filter cloth is first pressed tightly, and the discharge port of the sludge spreading mechanism pushes the filter cloth forward. During the feeding process of the sludge spreading mechanism, the discharge port of the sludge spreading mechanism evenly spreads the sludge onto the filter cloth.

[0006] However, in the above scheme, the discharge port is directly used to press against the filter cloth, which can easily cause the sludge to stick to the filter cloth and the sludge spreading mechanism, resulting in poor laying effect of the filter cloth and sludge.

[0007] Therefore, designing a cloth spreading device that can spread sludge while spreading filter cloth, and can ensure the spreading effect of filter cloth and sludge, has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] This invention provides a cloth spreading device for dewatering equipment, which solves the problem of poor spreading effect of existing cloth spreading devices on filter cloth and sludge.

[0009] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0010] A fabric spreading device for dewatering equipment includes a spreading body, which includes: a shell with an opening at its bottom; and a spreading pipe installed inside the shell, with the spreading port of the spreading pipe located inside the opening.

[0011] Furthermore, along the feeding direction of the material spreading body, the spreading pipe is installed on the rear side wall of the shell; the opening is set on the bottom wall of the shell, near the front side wall of the shell; preferably, the shell is a horizontally extending cuboid structure.

[0012] Furthermore, a pusher head extending forward and downward is provided on the front side wall of the housing, with the front end of the pusher head extending to a level below the material inlet of the material spreading pipe; the pusher head and the housing are integrated as one piece, or the pusher head and the front side wall of the housing are rotatably fitted together.

[0013] Furthermore, an installation joint is provided on the rear side wall of the housing, and the installation joint extends at least partially into the housing, with a sealed connection between the material laying pipe and the installation joint.

[0014] The end of the mounting connector furthest from the housing is connected to the feed pipe, which is a flexible hose.

[0015] Furthermore, the installation joint includes: a first installation component, disposed on the inner side of the rear side wall, which is cylindrical and has a radial protrusion in the middle. A plug is coaxially disposed on one side of the radial protrusion, and the material laying pipe is sleeved on the plug. A threaded head is coaxially disposed on the other side, which penetrates the rear side wall and extends at least partially to the outer side of the rear side wall; and a second installation component, disposed on the outer side of the rear side wall, which is cylindrical and is screwed onto the threaded head. At least part of the rear side wall is sandwiched between the radial protrusion and the second installation component.

[0016] Furthermore, a connecting pipe is provided at the end of the second mounting component away from the housing, and the first mounting component is sleeved on the connecting pipe and axially limited to the connecting pipe; the end of the connecting pipe is at least partially inserted into the first mounting component.

[0017] Furthermore, the material outlet extends vertically downwards from the opening, at least to the level of the bottom of the opening.

[0018] Preferably, the lower end of the material outlet extends to below the bottom of the opening.

[0019] Furthermore, the opening extends along the feeding direction perpendicular to the material spreading body, the material spreading pipe extends along the feeding direction of the material spreading body, and the material spreading port of the material spreading pipe bends downward from the opening.

[0020] Furthermore, the material spreading pipe includes an input section, a variable diameter section, and an output section, each having a channel. The first end of the variable diameter section is connected to the input section, and the second end of the variable diameter section is connected to the output section. From the first end to the second end, the width of the channel of the variable diameter section gradually increases, and the height of the channel gradually decreases. The material spreading opening bends downward from the end of the output section away from the variable diameter section and extends into the opening. Preferably, the vertical cross-section of the input section channel is the same as the vertical cross-section of the variable diameter section channel at the first end; the vertical cross-section of the output section channel is the same as the vertical cross-section of the variable diameter section channel at the second end.

[0021] Furthermore, the vertical cross-section of the variable diameter section channel at the first end is circular; the vertical cross-section of the variable diameter section channel at the second end is rectangular; preferably, the upper end of the material outlet is set as an arc shape that smoothly transitions with the output section, and the lower end is set as a rectangle with the same vertical cross-section as the output section channel.

[0022] Furthermore, the material spreading pipe includes multiple pipes arranged in a horizontal direction perpendicular to the feeding direction of the material spreading body; the opening is provided with multiple openings corresponding one-to-one with the material spreading ports of each material spreading pipe, and the material spreading ports of each material spreading pipe are respectively installed in the corresponding opening; or, the opening is a strip-shaped opening extending perpendicular to the feeding direction of the material spreading body, and the material spreading ports of each material spreading pipe are arranged side by side in the strip-shaped opening.

[0023] The present invention also provides a dewatering device, including a support frame, on which the above-mentioned fabric spreading device for the dewatering device is mounted, and a drive device for driving the fabric spreading device to reciprocate.

[0024] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0025] 1. By setting up a shell, the present invention can cover the material spreading pipe inside the shell. During the feeding process of the material spreading body, the shell is used to push the cloth, so that the material spreading pipe will not come into direct contact with the filter cloth. This can ensure the uniformity of the material output by the material spreading pipe and improve the flattening effect on the filter cloth.

[0026] 2. In this invention, under the action of the pipe wall, the material gradually becomes thinner and wider, enabling a thin layer of material to be output from the material outlet, thus ensuring that the material is evenly spread on the filter cloth. By setting multiple material spreading pipes, the uniformity of material spreading can be improved.

[0027] 3. By setting a downwardly extending pusher head at the front end of the shell, the present invention can leave space for material to be laid between the filter cloth and the material laying port below the material laying body, which can prevent the material from sticking to the material laying body and improve the spreading effect of the material. Thus, the material can be evenly spread between two adjacent filter cloths, which is beneficial to improving the dehydration effect of the material.

[0028] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0029] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0030] Figure 1 This is a cross-sectional schematic diagram of the sludge dewatering equipment in an embodiment of the present invention;

[0031] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of point B in the middle;

[0032] Figure 3 This is a schematic diagram of the sludge dewatering equipment in an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the connection between the fabric spreading device and the conveying pipe in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the fabric spreading device in an embodiment of the present invention;

[0035] Figure 6 This is a top view of the material body in an embodiment of the present invention;

[0036] Figure 7 This is an embodiment of the present invention. Figure 6 Schematic diagram of the cross section at point AA;

[0037] Figure 8 This is an embodiment of the present invention. Figure 7 Enlarged view of point A in the middle;

[0038] Figure 9 This is a schematic diagram of the structure when the fabric pusher is in the first position in an embodiment of the present invention;

[0039] Figure 10 This is a schematic diagram of the structure when the fabric pusher is in the second position in an embodiment of the present invention;

[0040] Figure 11 This is a schematic diagram of the structure of the material body in an embodiment of the present invention;

[0041] Figure 12 This is an exploded view of the connection structure between the mounting joint and the laying pipe in an embodiment of the present invention;

[0042] Figure 13This is a cross-sectional schematic diagram of the connection between the mounting joint and the material laying pipe in an embodiment of the present invention;

[0043] Figure 14 This is a schematic diagram of the structure of the first guiding component in an embodiment of the present invention;

[0044] Figure 15 This is a cross-sectional schematic diagram of the first guide component in an embodiment of the present invention.

[0045] Description of main components in the diagram:

[0046] 1. Fabric spreading device; 11. Spreading body; 111. Shell; 112. Spreading pipe; 1121. Spreading port; 1122. Input section; 1123. Variable diameter section; 1124. Output section; 113. Fabric pushing head; 1131. First support plate; 1132. Second support plate; 1133. Reinforcing plate; 1134. Solid column; 1135. Notch; 12. Base; 121. Second drive unit; 13. Drive device; 14. Front drive device; 15. Conveying pipe; 16. Mounting joint; 161. First mounting component; 611, Radial protrusion; 1612, Connector; 1613, Threaded head; 162, Second mounting component; 163, Connecting pipe; 17, First guide assembly; 171, First track; 1711, Groove; 1712, Limiting part; 172, Roller; 18, Second guide assembly; 181, Second track; 182, Slider; 183, First drive part; 2, Filter cylinder; 3, Discharge collection hopper; 4, Frame; 41, Guide roller; 5, First pressing assembly; 6, Second pressing assembly; 7, Rolling roller; 71, Filter cloth; 8, Extrusion equipment.

[0047] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0048] To make the objectives, 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 with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0049] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0050] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0051] like Figures 1 to 15 As shown in the embodiment of the present invention, a sludge dewatering device is introduced, including a cloth spreading device 1 and a filter cylinder 2. The cloth spreading device 1 lays the filter cloth 71 in the filter cylinder 2 and sprays the material to be treated onto the filter cloth 71.

[0052] During the material laying process, two sets of cloth pressing assemblies are used to fix the filter cloth 71.

[0053] In some specific embodiments, the cloth spreading device 1 is configured to fold the filter cloth 71 back and forth between the first side and the opposite second side of the filter cylinder 2 and spray the material to be treated onto the filter cloth 71.

[0054] In the direction of movement of the filter cloth 71, a first pressing cloth assembly 5 and a second pressing cloth assembly 6 are respectively provided on the first and second opposite sides of the top of the filter cylinder 2.

[0055] The filter cloth 71 is rolled up on the roll roller 7. The roll roller 7 containing the filter cloth 71 and the cloth spreading device 1 are located on the same side of the filter cylinder 2. The spreading port 1121 of the cloth spreading device 1 is higher than the upper edge of the filter cylinder 2.

[0056] One or more guide rollers 41 are provided between the cloth rolling roller 7 and the filter cylinder. After the filter cloth 71 passes around the guide roller 41, the first pressing assembly 5 presses the filter cloth onto the filter cylinder.

[0057] 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 laying device 1 is outside the filter cylinder 2, the first cloth-pressing assembly 5 presses the filter cloth 71 on the first side onto the filter cylinder 2; the cloth-pushing and laying device 1 pushes the filter cloth 71 towards the second side of the filter cylinder 2, and at the same time, spreads the material evenly on the filter cloth 71, and the other end of the filter cloth 71 is pulled out from the rolling roller 7; when it reaches the second side of the filter cylinder 2, the second cloth-pressing assembly 6 presses the filter cloth 71 on the second side onto the filter cylinder 2, and the cloth-pushing and laying device 1 returns to its original position.

[0058] During the retraction 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 operates again, pressing the filter cloth 71 on the first side onto the filter cylinder 2.

[0059] It also includes an extrusion device 8, which is located above the filter cylinder 2 and is used to extrude the material.

[0060] This process is repeated, and several layers of material to be treated, wrapped in filter cloth 71, are laid up and down inside the filter cylinder 2.

[0061] In this embodiment, the material to be processed is a solid-liquid mixture, such as a material containing water. There is no limitation on the water content.

[0062] In this embodiment, the sludge dewatering equipment is preferably used for solid-liquid separation of sludge with high water content.

[0063] In this embodiment, to ensure the material is properly encapsulated, the width of the filter cloth is greater than the width of the internal space of the filter cylinder, and the width of the material 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 lays the material on the filter cloth, the movable bottom plate of the filter cylinder moves down, and the filter cloth carrying the material falls into the filter cylinder. The sides of the filter cloth are bent upwards by the obstruction of the filter cylinder, wrapping the material from both sides to prevent the material from flowing out from both sides of the filter cloth.

[0064] In some preferred embodiments, there is a certain gap between the pressing position of the first pressing assembly and the internal space of the filter cylinder. Thus, when the movable bottom plate of the filter cylinder moves down, the portion of the filter cloth that exceeds the internal space of the filter cylinder bends upward under the obstruction of the first side of the filter cylinder, so that the side of the material close to the pushing and spreading device is also wrapped by the filter cloth.

[0065] Example 1

[0066] In the prior art, the sludge dewatering equipment uses a material spreading device 1 to directly press the filter cloth 71 against the material spreading port 1121, which is equivalent to pressing the filter cloth 71 against the material spreading pipe 112. During the process of pushing the filter cloth 71 out, the material is spread on the filter cloth 71, which can easily cause the material to stick to the filter cloth 71 and the material spreading device 1.

[0067] like Figures 1 to 15 As shown in the embodiment of the present invention, a cloth spreading device 1 for a sludge dewatering equipment is introduced.

[0068] The fabric spreading device 1 includes a spreading body 11, which includes a housing 111 and a spreading pipe 112 installed inside the housing 111. The bottom of the housing 111 is provided with an opening, and the spreading pipe 112 is installed inside the housing 111. The spreading port 1121 of the spreading pipe 112 is located inside the opening.

[0069] By setting the housing 111, the material spreading pipe 112 can be enclosed in the housing 111. During the feeding process of the material spreading body 11, the housing 111 is used to push the cloth, so that the material spreading pipe 112 will not directly contact the filter cloth 71. This can ensure the uniformity of the material output by the material spreading pipe 112 and improve the flattening effect on the filter cloth 71.

[0070] In some specific embodiments, the material feeding port 1121 extends vertically downward from the opening, at least to the level of the bottom of the opening. Preferably, the material feeding port 1121 extends at least partially below the opening, that is, the height of the material feeding port 1121 is lower than the opening. This prevents the housing 111 from obstructing the material output from the material feeding port 1121, and also prevents the bottom of the housing 111 from adhering to the material output from the material feeding tube 112.

[0071] In this embodiment, the opening extends along the feeding direction perpendicular to the material spreading body 11, the material spreading tube 112 extends along the feeding direction of the material spreading body 11, and the material spreading port 1121 of the material spreading tube 112 bends downward from the opening.

[0072] Specifically, the bottom wall of the housing 111 can extend horizontally, or it can extend upward or downward along the feeding direction of the material spreading body 11. The opening extends horizontally on the bottom wall of the housing 111 in a direction perpendicular to the feeding direction of the material spreading body 11. The material spreading tube 112 extends inside the housing 111 in a direction parallel to the bottom wall of the housing 111. The material spreading port 1121 of the material spreading tube 112 extends vertically downward from the opening, passing through the opening and extending below the opening.

[0073] Preferably, in this embodiment, the material spreading pipe 112 is provided with multiple pipes arranged along the feeding direction perpendicular to the material spreading body 11. By providing multiple material spreading pipes 112 for spreading materials, it is beneficial to improve the uniformity of material spreading.

[0074] In some possible embodiments, the bottom wall of the housing 111 is provided with a plurality of openings corresponding one-to-one with the material inlets 1121 of each of the material laying pipes 112, and the material inlets 1121 of each material laying pipe 112 are respectively installed in the corresponding openings.

[0075] Preferably, each of the openings is arranged along the feeding direction perpendicular to the material laying body 11, and adjacent openings are close together to further improve the uniformity of the laid material.

[0076] In some other possible embodiments, the opening is a strip-shaped opening extending along the feeding direction perpendicular to the material spreading body 11, and the material spreading openings 1121 of each material spreading tube 112 are arranged side by side in the strip-shaped opening.

[0077] In this embodiment, the opening extends along the feeding direction perpendicular to the material spreading body 11, and the material spreading ports 1121 of each material spreading tube 112 are arranged along the length direction of the opening. The width of the material spreading ports 1121 of each material spreading tube 112 along the feeding direction of the material spreading body 11 is the same, and the outlets of each material spreading tube 112 are aligned with each other along the feeding direction perpendicular to the feeding direction of the material spreading body 11.

[0078] Preferably, in this embodiment, all the material spreading pipes 112 are of the same model and the outlet of each material spreading pipe 112 has the same shape.

[0079] Preferably, in this embodiment, the material spreading opening 1121 extends in a horizontal direction.

[0080] Preferably, in this embodiment, the interval between two adjacent material spreading ports 1121 is very small. Specifically, the material spreading ports 1121 of two adjacent material spreading ports 1121 are close to each other, and the wall thickness between two adjacent material spreading ports 1121 is small. Specifically, the wall thickness at both ends of the material spreading port 1121 of the material spreading pipe 112 along the feed direction perpendicular to the material spreading body 11 is less than or equal to the closed thickness at both ends along the feed direction of the material spreading body 11.

[0081] In some possible embodiments, the spreading pipe 112 includes an input section 1122, a variable diameter section 1123, and an output section 1124 arranged sequentially along the feeding direction of the spreading body 11. The output section 1124 is flat, and the spreading port 1121 extends downward from the end of the output section 1124. Through this arrangement, the material conveyed in the spreading pipe 112 gradually extends in a direction perpendicular to the feeding direction of the spreading body 11 during the conveying process, and gradually becomes thinner. That is, under the action of the pipe wall of the spreading pipe 112, the material gradually becomes thinner and wider, enabling the spreading port 1121 to ultimately output a thin layer of material, allowing the material to be evenly spread on the filter cloth 71.

[0082] Preferably, the extension length of the opening is less than or equal to the width of the filter cloth 71.

[0083] More preferably, the output sections 1124 of two adjacent laying tubes 112 are bonded together, and the total extension length of the output sections 1124 of each laying tube 112 along the feed direction perpendicular to the laying body 11 is less than or equal to the width of the filter cloth 71.

[0084] Preferably, the extension direction of the output segment 1124 is parallel to the bottom wall of the housing 111.

[0085] The existing material distribution pipe suffers from uneven material discharge, with inconsistent material thickness on the filter cloth. Some areas have a thicker material layer, while others have almost no material or a very thin layer. Therefore, additional components are needed to level the material on the filter cloth; otherwise, the uneven, multi-layered material is directly compressed, resulting in poor solid-liquid separation.

[0086] In some preferred embodiments, the spreading pipe 112 includes a variable diameter section 1123 and an output section 1124, each having a channel. The second end of the output section 1124 is provided with a spreading port 1121. The second end of the variable diameter section 1123 is connected to the first end of the output section 1124, so that the channels of the variable diameter section 1123 and the output section 1124 are connected. The cross-section of the channel of the output section 1124 is the same in the direction perpendicular to the material's forward movement, and the bottom surface of the output section 1124 that carries the material is a plane. The cross-sectional area of ​​the channel of the variable diameter section 1123 at the second end is smaller than that at the first end, and the vertical cross-section of the channel of the output section 1124 is the same as the vertical cross-section of the channel of the variable diameter section 1123 at the second end.

[0087] The first end of the variable diameter section 1123 is connected to the channel of the input section 1122 used for conveying materials. Material from the input section 1122 enters the output section 1124 from the end of the variable diameter section 1123 with the larger vertical cross-sectional area. Due to the change in the vertical cross-sectional area of ​​the channel in the output section 1124, pressure is applied within the channel, resulting in a wider distribution of material in the horizontal direction perpendicular to the material flow (i.e., the width of the channel). After flowing into the output section 1124 from the end of the variable diameter section 1123 with the smaller vertical cross-sectional area, the material further expands horizontally within the channel of the output section 1124, potentially occupying the entire channel. It then flows out evenly from the material outlet 1121 of the output section 1124 and is laid on the filter cloth.

[0088] In some embodiments, the width of the second end of the variable diameter section 1123 channel is greater than the width of the first end in the horizontal direction perpendicular to the material flow direction.

[0089] In the vertical direction perpendicular to the material flow direction, the height of the second end of the variable diameter section 1123 channel is less than the height of the first end.

[0090] Alternatively, the width of the variable diameter section 1123 gradually increases from the first end to the second end, while the height of the variable diameter section 1123 gradually decreases from the first end to the second end.

[0091] With the setting of the variable diameter section 1123 channel structure, the material enters the channel through the first end of the variable diameter section 1123. During the forward movement, the pressure gradually increases, and the material occupies the variable diameter section 1123 from the center position to both sides in a continuous dispersion.

[0092] Alternatively, the vertical cross-section of the channel at the first end of the variable diameter section 1123 can be circular, near-circular, polygonal, elliptical, or other shapes. Considering ease of processing and assembly, a more preferred option is that the vertical cross-section of the channel at the first end of the variable diameter section 1123 can be circular or near-circular.

[0093] The variable diameter section 1123 has a polygonal width in the vertical cross-section at its second end, with the width direction being a straight line. Preferably, it can be a polygon with parallel sides, such as a parallelogram or rectangle.

[0094] In some implementations, the cross-sectional area of ​​the variable diameter section 1123 at the second end is 0.7-1.0 times that of the cross-sectional area at the first end.

[0095] In some embodiments, the length of the variable diameter section 1123 in the material flow direction is in a ratio of 1:0.6 to 1:3 to the width of the channel at the second end of the variable diameter section 1123.

[0096] The width of the second end of the variable diameter section 1123 refers to the length of the output section 1124 channel in the horizontal direction perpendicular to the material flow direction.

[0097] The length of the variable diameter section 1123 refers to the length between the first end and the second end.

[0098] In some embodiments, the ratio of the length L1 of the variable diameter section 1123 to the length L2 of the output section 1124 in the material flow direction is 1:0.5-1:8.

[0099] The vertical cross-section of the output segment 1124 channel is a polygon with a straight line in the width direction. Preferably, it can be a polygon with parallel sides at the top and bottom; more preferably, the structures on both sides between the top and bottom surfaces of the output segment 1124 channel are symmetrically arranged.

[0100] For example, the vertical cross-section of output channel 1124 can be rectangular, etc. That is, the vertical cross-section shape of output channel 1124 and variable diameter channel 1123 at the second end is the same.

[0101] The material discharged from the second end of the variable diameter section 1123 flows into the output section 1124 channel in the width direction on both sides towards the side walls. The material can be continuously dispersed throughout the bottom of the output section 1124 channel and flows out evenly through the outlet of the output section 1124.

[0102] The upper end of the material outlet 1121 is configured as an arc shape that smoothly transitions to the output section, and the material outlet 1121 faces downward. The lower end of the material outlet 1121 has the same vertical cross-section as the vertical cross-section of the output section channel, preferably a rectangle.

[0103] In this embodiment, the variable diameter section 1123 and the output section 1124 can be integrated as one unit or as separate units.

[0104] Through the material spreading pipe 112 of this embodiment, the material flowing in from the first end of the variable diameter section 1123 passes through the channels of the first and second components and can flow out evenly and continuously through the material spreading port 1121, distributing evenly and continuously on the filter cloth. The thickness of the material spread on the filter cloth is relatively uniform, or the surface of the material is relatively flat. No additional steps or components are needed to level the spread material. Therefore, while saving process steps or reducing components, a good solid-liquid separation effect can be achieved.

[0105] In some specific embodiments, the material spreading pipe 112 is installed on the rear side wall of the housing 111; the opening is located on the bottom wall of the housing 111, near the front side wall of the housing 111.

[0106] In this embodiment, the housing 111 is preferably a horizontally extending cuboid structure. Of course, it can also be other structures with cavities. The aforementioned material laying tube 112 is placed in the cavity inside the housing.

[0107] Specifically, the material spreading pipe 112 can be welded to the housing 111, or the material spreading pipe 112 and the housing 111 can be detachably connected. It is only necessary to ensure that there is no relative movement between the material spreading pipe 112 and the housing 111 during the feeding process of the material spreading body 11.

[0108] Preferred, such as Figures 11 to 13 As shown, in this embodiment, an installation joint 16 is provided on the rear side wall of the housing 111. The installation joint 16 is fixed on the rear side wall of the housing 111. The installation joint 16 extends at least partially into the housing 111. The input section 1122 of the material laying pipe 112 is sealed to the installation joint 16.

[0109] Specifically, the mounting joint 16 includes a first mounting member 161 disposed inside the housing 111 and a second mounting member 162 disposed outside the housing 111. The first mounting member 161 and the second mounting member 162 are connected and clamped on the rear side wall of the housing 111. The material laying pipe 112 is inserted into or sleeved with the first mounting member 161, and a sealing structure is provided at the connection between the material laying pipe 112 and the first mounting member 161.

[0110] In some specific embodiments, the first mounting member 161 is disposed on the inner side of the rear sidewall, is cylindrical, and has a radial protrusion 1611 in the middle. A connector 1612 is coaxially disposed on one side of the radial protrusion 1611, and the material laying tube 112 is sleeved on the connector 1612. A threaded head 1613 is coaxially disposed on the other side of the radial protrusion 1611, and the threaded head 1613 penetrates the rear sidewall and extends at least partially to the outer side of the rear sidewall. The second mounting member 162 is disposed on the outer side of the rear sidewall, is cylindrical, and has an internal thread on its inner peripheral wall that matches the threaded head 1613. The second mounting member 162 is tightened onto the threaded head 1613, and the rear sidewall is at least partially sandwiched between the radial protrusion 1611 and the second mounting member 162.

[0111] In some possible embodiments, the outer peripheral wall of the radial protrusion 1611 is at least partially flat, and the radial protrusion 1611 abuts against the top and / or bottom wall of the housing 111 through the flat surface to achieve circumferential positioning between the first mounting member 161 and the rear sidewall of the housing 111.

[0112] Preferably, in this embodiment, the material laying tube 112 and the plug 1612 of the first mounting member 161 are interference-fitted. Preferably, the material laying tube 112 is sleeved on the plug 1612, the end of the material laying tube 112 abuts against the radial protrusion 1611, and a sealing ring is provided at the overlap of the material laying tube 112 and the plug 1612 to ensure the sealing effect between them.

[0113] Specifically, a sealing groove can be provided on the outer peripheral wall of the plug 1612, and a sealing ring can be provided in the sealing groove. The outer diameter of the sealing ring is larger than the outer diameter of the plug 1612, and the sealing ring is elastically abutted against the inner peripheral wall of the laying pipe 112.

[0114] 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 the end of the second mounting member 162 away from the housing 111, and the first mounting member 161 is sleeved on the connecting pipe 163 and axially limits its movement with the connecting pipe 163. At least part of the end of the connecting pipe 163 is inserted into the first mounting member 161.

[0115] Specifically, the end of the connecting pipe 163 is provided with a first limiting protrusion that protrudes outward in a radial direction, the second mounting member 162 is sleeved on the outer periphery of the connecting pipe 163, and the end of the second mounting member 162 away from the housing 111 is provided with a second limiting protrusion that protrudes inward in a radial direction. The second limiting protrusion abuts against the end of the first limiting protrusion away from the housing 111, thereby achieving axial limiting between the second and the connecting pipe 163.

[0116] The second mounting piece 162 is tightened onto the threaded head 1613, and the first limiting protrusion abuts against the end of the threaded head 1613. The first limiting protrusion protrudes towards the center of one side of the threaded head 1613 and is inserted into the threaded head 1613 to further improve the stability of the connection.

[0117] In this embodiment, the end of the connecting pipe 163 away from the housing 111 is used to connect to the hose for conveying materials.

[0118] In this embodiment, the connecting pipe 163 is rigid and can be integral with the hose used for conveying materials, or it can be detachable from the hose used for conveying materials.

[0119] Preferably, in some possible embodiments, the end of the hose for conveying materials is also provided with a first mounting member 161, the plug 1612 of the first mounting member 161 is inserted into the hose for conveying materials and is interference-fitted with the hose for conveying materials, and the end of the connecting pipe 163 away from the housing 111 is also provided with a second mounting member 162 for connecting with the threaded head 1613 of the first mounting member 161.

[0120] Alternatively, a first mounting piece 161 can be injection molded and connected to the end of the hose used for conveying materials. A connection can also be made between the end of the hose used for conveying materials and the connecting pipe 163. Only a sealed connection is required.

[0121] Preferably, in this embodiment, the front sidewall of the housing 111 is provided with a forward and downward inclined pusher head 113, the front end of the pusher head 113 extends to the material laying opening 1121 below the material laying tube 112; the pusher head 113 and the housing 111 are integrated, or the pusher head 113 and the front sidewall of the housing 111 are rotatably coupled.

[0122] Preferably, in this embodiment, the pusher head 113 includes a first support plate 1131 and a second support plate 1132 extending forward and downward from the upper and lower ends of the front sidewall of the housing 111, respectively, and a solid column 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 column 1134 from the upper and lower sides, respectively.

[0123] Preferably, in this embodiment, the solid column 1134 is a solid cylindrical structure. This embodiment also provides a sludge dewatering device equipped with the aforementioned cloth-pushing and spreading device 1, the sludge dewatering device further including a drive device 13 for driving the cloth-pushing and spreading device 1 to reciprocate.

[0124] Example 2

[0125] In the prior art sludge dewatering equipment, the cloth pushing and spreading device 1 moves forward against the filter cloth 71 while spreading material onto the filter cloth 71. During this process, the material spreading opening is used to press against the filter cloth, causing the filter cloth to unwind from the rolling roller. The filter cloth below the material spreading opening is in contact with the material spreading opening. When the cloth pushing and spreading device moves forward and spreads material at the same time, it is easy for the material to stick to the bottom of the cloth pushing and spreading device and the filter cloth above the material spreading opening.

[0126] In existing technologies, to avoid material sticking to the filter cloth 71 and the cloth-pushing and spreading device 1, a common approach is to spread the material during the reversing process of the cloth-pushing and spreading device. Specifically, the cloth-pushing and spreading device pushes the filter cloth forward to its furthest point, where a second cloth-pressing assembly fixes the filter cloth, creating a height difference between the filter cloth below the spreading opening and the opening itself to accommodate the material flowing out. Then, the cloth-pushing and spreading device retracts, spreading the material during this reversing process. This approach has excessively low material spreading efficiency.

[0127] like Figures 1 to 15 As shown, based on Embodiment 1, the structure of the material spreading body 11 of the cloth spreading device 1 of a sludge dewatering equipment is further introduced to solve the above problems. It can not only ensure the efficiency of material spreading, but also improve the spreading effect of the cloth spreading device 1 on the filter cloth 71 and the material.

[0128] like Figure 8 As shown, in this embodiment, the fabric spreading device 1 includes a spreading body 11, and a spreading opening 1121 is provided at the bottom of the spreading body 11. A downwardly extending spreading head 113 is provided at the front end of the spreading body 11. The first end of the spreading head 113 is connected to the spreading body 11, and the second end opposite to the first end is lower than the first end. The second end of the spreading head 113, opposite to the first end, is lower than the spreading opening 1121 at least when the spreading head 113 abuts against the filter cloth 71.

[0129] In the above scheme, the front end of the material spreading body 11 is specifically the end of the material spreading body 11 facing the filter cylinder 2, that is, the end of the material spreading body 11 that abuts against the filter cloth 71 during the feeding process. During the feeding process, the push head 113 at the front end of the material spreading body 11 pushes against the filter cloth 71, so that the filter cloth 71 is pulled out from the rolling roller 7.

[0130] like Figure 1 and Figure 2As shown, the pusher head 113 at the front end of the spreading body 11 presses against the filter cloth 71, causing the filter cloth 71 to be pulled out from the rolling roller 7. During this process, the filter cloth covers the front end of the spreading body 11, and slides along the front end of the spreading body 11 as the spreading body 11 moves forward.

[0131] By setting a downwardly extending pusher head 113 at the front end of the material spreading body 11, and setting the material spreading opening 1121 at the bottom of the material spreading body 11 behind the pusher head 113, and setting the second end of the pusher head 113 to be lower than the material spreading opening 1121 when the pusher head 113 abuts against the filter cloth 71, the material spreading body 11, during the feeding and material spreading process, pulls the filter cloth 71 out from the roll roller 7 by the pusher head 113, and uses the reaction force to stretch the filter cloth 71 below the material spreading body 11 flat, while simultaneously spreading the material on the ground. On the filter cloth 71 below the main 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 pusher head 113 and the laying opening 1121 can leave space for material to be laid between the filter cloth 71 below the main body 11 and the laying opening 1121, which can prevent the material from sticking to the main body 11 and improve the spreading effect of sludge. Thus, the material can be evenly spread between two adjacent layers of filter cloth 71, which is conducive to improving the dewatering effect of the material.

[0132] Preferably, in this embodiment, at least when the pusher head 113 abuts against the filter cloth 71, the height difference between the second end of the pusher head 113 and the material spreading opening 1121 is greater than the thickness of the material spread on the filter cloth. This further prevents the material from adhering to the material spreading body 11.

[0133] In some specific embodiments, the pusher head 113 extends downward at an angle from the front end of the fabric spreading body 11, and the thickness of the pusher head 113 gradually decreases in the direction perpendicular to the first end to the second end from the first end to the second end. Specifically, the thickness of the pusher head 113 gradually decreases in the direction away from the fabric spreading body 11.

[0134] With the above settings, the pusher head 113 of the material spreading body 11 pushes the filter cloth 71 forward and pulls the filter cloth 71 out of the rolling roller 7. During this process, the filter cloth 71 slides smoothly along the pusher head 113, reducing the resistance of the pusher head 113 to the filter cloth 71. At the same time, it can prevent the filter cloth 71 from having too much excess 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 retracts.

[0135] Preferably, in this embodiment, the second end of the pusher head 113 is configured as an arc shape. This further improves the smoothness of the filter cloth 71 sliding along the second end of the pusher head 113 and prevents the pusher head 113 from damaging the filter cloth 71 during the pushing process.

[0136] Preferably, in the direction perpendicular to the first end to the second end of the pusher head 113, the maximum thickness of the arc at the second end of the pusher head 113 is less than the thickness at the first end of the pusher head 113.

[0137] In this embodiment, the fabric pusher 113 can be configured as a solid structure or a hollow structure.

[0138] In some specific embodiments, the second end of the pusher head 113 is a solid column 1134 with a diameter smaller than the thickness of the front end of the fabric body 11. The solid column 1134 is connected to the fabric body 11 through a support plate that extends downward from the front end of the fabric body 11. The end of the support plate away from the solid column 1134 is the first end of the pusher head 113.

[0139] Specifically, the solid column 1134 is positioned in front of the material laying body 11, spaced apart from the material laying body 11, and connected to the front end of the material laying body 11 via the support plate.

[0140] In this embodiment, the solid column 1134 forms the second end of the pusher head 113, which can prevent the second end of the pusher head from deforming and improve the service life of the device.

[0141] In some possible embodiments, a support plate extends obliquely from the upper side of the solid column 1134 along the tangential direction of the solid body towards the upper edge of the front end of the fabric body 11, and the end of the support plate is smoothly connected to the outer peripheral wall of the solid column 1134.

[0142] In some other possible embodiments, two support plates extend obliquely from the upper and lower sides of the solid column 1134 along the tangential direction of the solid body towards the upper and lower edges of the front end of the material laying body 11; the ends of the support plates are smoothly connected to the outer peripheral wall of the solid column 1134.

[0143] Preferably, the diameter of the solid column 1134 is smaller than the thickness of the front end of the fabric spreading body 11; the support plate includes two plates, which extend obliquely from the outer peripheral wall of the solid column 1134 towards the upper and lower edges of the front end of the fabric spreading body 11, respectively. The end of the support plate away from the solid body forms the first end of the fabric pushing head. One end of the support plate is integrally connected to the solid column 1134, and the other end is connected to the front end of the fabric spreading body 11. The end of the support plate and the outer peripheral wall of the solid column 1134 are smoothly connected, thereby forming a smooth surface at the second end of the fabric pushing head 113, avoiding scratching the filter cloth 71 during the fabric pushing process.

[0144] Preferably, in this embodiment, the two support plates are tangent to the upper and lower sides of the solid column 1134, respectively.

[0145] Preferably, in this embodiment, a reinforcing plate 1133 is provided between the two support plates to reinforce the structure of the pusher head 113.

[0146] like Figure 8 As shown, in some specific embodiments, the extension length of the support plate connected to the solid column 1134 from below is less than the extension length of the support plate connected to the solid column 1134 from above. The reinforcing plate 1133 is disposed between the end of the support plate connected to the solid column 1134 from below away from the solid column 1134 and the middle of the support plate connected to the solid column 1134 from above.

[0147] In this embodiment, the pusher head 113 and the material spreading body 11 can be integrated as one unit, or the pusher head 113 and the material spreading body 11 can be configured to rotate together.

[0148] Preferably, in this embodiment, at least one 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 connected to the material laying body 11.

[0149] Preferably, in this embodiment, the shape of the end of the pusher head 113 connected to the fabric spreading body 11 is adapted to the shape of the front end of the fabric spreading body 11.

[0150] In some possible embodiments, the pusher head 113 is integrated with the material spreading body 11. Specifically, the ends of the two support plates of the pusher head 113 that are away from the solid column 1134 are respectively connected to the upper and lower edges of the front end of the material spreading body 11, and the second end of the pusher head 113 is lower than the material spreading opening 1121.

[0151] In this embodiment, to prevent the pusher head 113 from scraping the material below the material spreading body 11, the material spreading body 11 can be raised when it retracts, or the entire pusher spreading device can be raised, or the movable base plate of the filter cylinder can be moved downwards to allow the pusher head 113 to avoid the material spread on the filter cloth. In some preferred embodiments, the movable base plate initially moves to a position slightly below the top of the filter cylinder 2, and the distance between the movable base plate and the top of the filter cylinder 2 is greater than or equal to the thickness of the material spread on the filter cloth 71; when the pusher spreading device 1 moves beyond the first side along the front end in the feeding direction, the movable base plate of the filter cylinder 2 moves downwards by one stroke, which matches the thickness of the material spread on the filter cloth 71 and the sum of the thickness of the filter cloth 71.

[0152] Specifically, in this embodiment, the filter cylinder includes a cylinder body and a movable bottom plate located inside the cylinder body. The cylinder body has a hollow cubic structure and water outlet holes are provided on all sides. The top of the cylinder body is open, the movable bottom plate matches the cross-section of the inner cavity of the cylinder body and can move up and down along the cylinder body, and the bottom of the cylinder body is open.

[0153] like Figure 9 and Figure 10 As shown, in some other possible embodiments, the pusher head 113 is rotatably coupled to the material spreading body 11. Thus, when the material spreading body 11 advances, the pusher head 113 can be controlled to rotate downwards, so that the second end of the pusher head 113 is lower than the material spreading opening 1121, creating a height difference between the pusher head 113 and the material spreading opening 1121 greater than the thickness of the material spread on the filter cloth. When the material spreading body 11 retracts, the pusher head 113 can be controlled to rotate upwards, so that the second end of the pusher head 113 is higher than the material on the filter cloth 71. This prevents the pusher head 113 from scraping against the material below the material spreading body 11, avoids material sticking to the pusher head 113, improves the material spreading effect, and also helps to increase the retraction speed of the material spreading body 11 and increase the spreading rate.

[0154] Preferably, in this embodiment, the pusher head 113 includes a first position that rotates upward to the upper limit and a second position that rotates downward to the lower limit. When the pusher head 113 is in the first position and the second position, the height difference between the second end of the pusher head 113 is greater than the thickness of the material laid on the filter cloth.

[0155] In this embodiment, a structure for driving the pusher head 113 to rotate between a first position and a second position can be provided between the pusher head 113 and the fabric spreading body 11.

[0156] In this embodiment, the fabric pusher 113 can be driven by a separate small motor.

[0157] Preferably, in this embodiment, an elastic element is provided between the pusher head 113 and the spreading body 11. The elastic element drives the pusher head 113 to rotate to a first position. During the forward feeding process of the spreading body 11, the reaction force exerted by the filter cloth 71 on the pusher head 113 is greater than the elastic force of the elastic element. Driven by the reaction force of the filter cloth 71, the pusher head 113 rotates to a second position. Thus, the pusher head 113 can automatically switch between the first and second positions and can match the pusher head's spreading action with the spreading body 11.

[0158] Specifically, in this embodiment, when the pusher head 113 rotates to the first position, the height of the axis of the solid column 1134 is lower than the height of the rotation center of the pusher head 113, thereby ensuring that the pusher head 113 can smoothly rotate to the second position under the reaction force of the filter cloth 71.

[0159] In some possible embodiments, a limiting structure is provided between the pusher head 113 and the spreading body 11 to limit the upper limit position of the pusher head 113 to rotate upward and the lower limit position of the pusher head 113 to rotate downward.

[0160] In some specific embodiments, the pusher head 113 is mounted on the front end of the spreading body 11 via a rotating shaft. The axis of the rotating shaft extends laterally in a direction perpendicular to the feed direction of the spreading body 11. The limiting structure includes a first limiting structure that limits the upper limit position of the pusher head 113 to rotate upward, and the first limiting structure limits the pusher head 113 to a first position. The second limiting structure limits the lower limit position of the pusher head 113 to rotate downward, and the second limiting structure limits the pusher head 113 to a second position.

[0161] In some possible embodiments, the limiting structure may be disposed between the rotating shaft and the bushing on the pusher head 113.

[0162] like Figure 9 and Figure 10 As shown, in some other possible embodiments, the rotation of the fabric pusher head 113 can be limited by the front end face of the fabric spreading body 11. Specifically, the rotating shaft can be positioned between the middle of the front end face of the fabric spreading body 11 and the fabric pusher head 113. A gap is provided between the fabric pusher head 113 and the fabric spreading body 11 for the fabric pusher head 113 to rotate. When the fabric pusher head 113 rotates to the first position, the upper end of the side of the fabric pusher head 113 near the fabric spreading body 11 abuts against the front end of the fabric spreading body 11. When the fabric pusher head 113 rotates to the second position, the lower end of the side of the fabric pusher head 113 near the fabric spreading body 11 abuts against the front end of the fabric spreading body 11.

[0163] 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 pusher head are provided with an arc-shaped chamfer to avoid scratching the filter cloth.

[0164] In this embodiment, the elastic element used to drive the pusher head 113 to rotate to the first position can be a torsion spring.

[0165] Preferably, in this embodiment, the top of the working end of the first pressing assembly 5 is substantially flush with the bottom of the second end of the pushing head 113, thereby enabling the filter cloth 71 below the laying body 11 to be substantially horizontal.

[0166] Specifically, when the working end of the first pressing cloth 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 pressing cloth assembly 5 is slightly lower than the bottom of the second end of the pushing cloth head 113, so that the pushing cloth head 113 can pass smoothly.

[0167] Preferably, in this embodiment, the height difference between the bottom of the second end of the pusher head 113 and the top of the working end of the first pressing assembly 5 is greater than or equal to the thickness of the filter cloth 71.

[0168] Preferably, in this embodiment, the material spreading port 1121 is located at the bottom of the material spreading body 11 and near the front end of the material spreading body 11, that is, the material spreading port 1121 is located near the cloth pushing head 113, so that the material can be spread all over the filter cloth 71 below, making the structure compact.

[0169] In this embodiment, a sludge dewatering device is also provided. The sludge dewatering device includes a filter cylinder 2 and the aforementioned 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 moves back and forth above the filter cylinder 2, spreading the filter cloth 71 in layers inside the filter cylinder 2 and spraying material onto the filter cloth 71.

[0170] Specifically, the material spreading body 11 sprays material onto the filter cloth 71 during the feeding process, and stops spraying material onto the filter cloth 71 during the retraction process.

[0171] Preferably, the retraction speed of the material spreading body 11 is greater than or equal to the feed speed of the material spreading body 11.

[0172] Preferably, in this embodiment, the material body 11 extends in the horizontal direction.

[0173] Preferably, in this embodiment, the second end of the pusher head 113 has a notch in the middle, which is adapted to the shape of the working end of the second pressing assembly located on the side of the filter cylinder 2 away from the pusher head, so that the working end of the second pressing assembly can pass through and press the filter cloth 71 covered on the second end of the pusher head 113 onto the filter cylinder 2.

[0174] Specifically, the notch 1135 extends through the pusher head 113 in a vertical direction perpendicular to the first end to the second end, and the opening of the notch 1135 faces away from the first end of the pusher head 113; preferably, a second pressing assembly is provided on the side of the filter cylinder 2 away from the pusher head 113; in a horizontal direction perpendicular to the first end to the second end of the pusher head 113, the width of the working end of the second pressing assembly is smaller than the width of the notch 1135; the working end of the second pressing assembly passes through the notch 1135 from top to bottom, pressing the filter cloth 71 covered on the second end of the pusher head 113 onto the filter cylinder 2.

[0175] 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 onto the filter cylinder.

[0176] By setting the thickness of the pusher head 113 to gradually decrease in the direction perpendicular to the first end to the second end, it is easier for the working end of the second pressing assembly 6 to pass through the notch, press the filter cloth tightly, and improve the smoothness of pressing the cloth.

[0177] In this embodiment, a material spreading pipe is provided inside the shell of the material spreading body 11. The material spreading pipe includes a variable diameter section and an output section, each having a channel. The second end of the output section is provided with a material spreading port. The second end of the variable diameter section is connected to the first end of the output section, so that the channels of the variable diameter section and the output section are connected. The channels of the output section have the same cross-section perpendicular to the material forward direction, and the bottom surface of the output section that carries 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-section of the output section channel is the same as the vertical cross-section of the variable diameter section channel at the second end. 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.

[0178] This device can more evenly spread water-containing materials (such as sludge) on the filter cloth.

[0179] Example 3

[0180] Sludge dewatering equipment typically has a discharge collection hopper 3 between the cloth-pushing and spreading device 1 and the filter cylinder 2 for collecting the dewatered material. During the cloth-pushing and spreading process, 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 collection hopper 3 and the space above the filter cylinder 2. During the cloth-pushing and spreading process, the drive device 13 first drives the cloth-pushing and spreading device 1 to extend until it is 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 drive device 13 of the cloth-pushing and spreading device 1 always maintains a large extension length, which is not conducive to ensuring the smoothness of the movement of the cloth-pushing and spreading device 1. Poor smoothness of the movement of the cloth-pushing and spreading device 1 will directly lead to uneven spreading of the material.

[0181] In the above scheme, the cloth spreading process is the process in which the cloth spreading device 1 moves back and forth between the first and second sides of the filter cylinder 2 to fold the filter cloth 71 and spray the material to be treated onto the filter cloth 71.

[0182] like Figures 1 to 15 As shown in the embodiments of the present invention, a dewatering device for water-containing materials is introduced. In some specific embodiments, it can be a sludge dewatering device.

[0183] The dewatering equipment for the moisture-containing material includes a frame 4 and a fabric spreading device 1 mounted on the frame 4. The fabric spreading device 1 includes a base 12 and a spreading body 11 mounted on the base 12. The base 12 is mounted on the frame 4 via a first guide assembly 17, and the spreading body 11 is mounted on the base 12 via a second guide assembly 18. One end of a drive 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 fabric spreading device 1 preferably adopts any of the technical solutions for the spreading body 11 described in Embodiment 1 or Embodiment 2.

[0184] Therefore, before pushing and laying the fabric, the base 12 can be driven to carry the fabric laying body 11 to move along the first guide component 17 and approach the filter cylinder 2. During the pushing and laying process, the drive device 13 only needs to drive the fabric laying body 11 to reciprocate above the filter cylinder 2. The extension length of the drive device 13 is kept within a small range, which helps to ensure the smoothness of the reciprocating motion of the fabric laying body 11 and improves the efficiency and control accuracy of pushing and laying the fabric. At the same time, the use of a small-stroke drive device 13 can realize the driving of the fabric laying body 11, which helps to reduce the cost of the equipment.

[0185] In this embodiment, the cloth spreading process is the process in which the spreading body 11 of the cloth 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 treated onto the filter cloth 71.

[0186] In this embodiment, the extension direction of the first guide component 17 may be the same as or different from the extension direction of the second guide component 18. Specifically, it can be set according to the relative positional relationship between the fabric spreading device 1 and the filter cylinder 2.

[0187] Specifically, the extension direction of the first guide component 17 is parallel to the extension direction of the second guide component 18. As the base 12 moves along the first guide component 17, the front end of the fabric pushing body of the fabric spreading device 1 approaches and remains aligned with the first side of the filter cylinder 2. Alternatively, the extension direction of the first guide component 17 is angled to the extension direction of the second guide component 18. As the base 12 moves along the first guide component 17, the front end of the fabric pushing body of the fabric spreading device 1 approaches and gradually aligns with the first side of the filter cylinder 2.

[0188] In this embodiment, the first guide component 17 and the second guide component 18 can be either a sliding guide rail structure or a rolling guide rail structure.

[0189] In some specific embodiments, the second guide component 18 is a sliding guide rail structure, which is disposed on one or both sides of the feeding direction of the material spreading body 11.

[0190] The second guide assembly 18 includes a second track 181 and a slider 182 fitted on the second track 181.

[0191] In this embodiment, the second track 181 is disposed on one or both sides of the feeding direction of the material spreading body 11, and the slider 182 is disposed on the base 12 corresponding to the second track 181; or, the second track 181 is disposed on the base 12 on one or both sides of the feeding direction of the material spreading body 11, and the slider 182 is disposed on the material spreading body 11 corresponding to the second track 181; or, the second track 181 is disposed on one side of the feeding direction of the material spreading body 11, and the slider 182 is disposed on the other side of the feeding direction of the material spreading body 11, and the base 12 is provided with the slider 182 and the second track 181 respectively corresponding to and cooperating with the second track 181 and the slider 182 on the material spreading body 11.

[0192] Preferably, in this embodiment, the sliding guide rail structure is provided in two sets, which are respectively arranged between the left and right sides of the material laying body 11 and the top of the base 12.

[0193] Specifically, in this embodiment, the sliding guide rail structure includes a second track 181 and a slider 182 mounted on the second track 181 and sliding back and forth along the second track 181. The second track 181 may be disposed on the left and right sides of the material laying body 11 and / or disposed on the base 12, and the slider 182 is disposed on the base 12 and / or disposed on the left and right sides of the material laying body 11, corresponding to the second track 181, and sleeved on the second track 181.

[0194] That is, the second track 181 can be set on the base 12 and the slider 182 can be set on the material laying body 11, or the slider 182 can be set on the base 12 and the second track 181 can be set on the material laying body 11, or the second track 181 on one side of the material laying body 11 can be set on the base 12 and the slider 182 can be set on the material laying body 11, or the second track 181 on the other side of the material laying body 11 can be set on the material laying body 11 and the slider 182 can be set on the base 12.

[0195] Preferably, in this embodiment, the second track 181 is disposed on the base 12, and the slider 182 is disposed on the material spreading body 11.

[0196] Specifically, such as Figure 4 and Figure 5As shown, in this embodiment, the extension length of the base 12 along the feed direction perpendicular to the material spreading body 11 is greater than the extension length of the material spreading body 11 along the feed direction perpendicular to the material spreading body 11. The first track 171 is installed on the top of the base 12, and two first tracks 171 are respectively arranged on both sides of the material spreading body 11. Outwardly extending sliders 182 are respectively provided on both sides of the material spreading body 11, and the sliders 182 are respectively fitted onto the corresponding first tracks 171. Through the above arrangement, a high degree of parallelism can be maintained between the material spreading body 11 and the base 12 at all times, preventing the front end of the material spreading body 11 from tilting downwards during the forward feeding process.

[0197] In this embodiment, the feeding direction of the material laying body 11 is the extending direction of the second guide component 18.

[0198] Preferably, in this embodiment, the material spreading body 11 extends horizontally, the top surface of the base 12 is set as a horizontal plane, and the top surfaces of the material spreading body 11 and the base 12 are close to each other. This improves the structural compactness of the material spreading device 1. Arranging the sliding guide rail structure between the left and right sides of the material spreading body 11 and the base 12 facilitates the fit between the material spreading body 11 and the base 12.

[0199] 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.

[0200] In some specific embodiments, the housing 111 of the material body 11 is configured as a cuboid structure, the slider 182 extends outward from the left and right side walls of the housing 111, the second track 181 is configured as a column, the slider 182 is provided with a through hole adapted to the second track 181, and the slider 182 is sleeved on the second track 181 through the through hole.

[0201] The drive device 13 is provided with two sets of parallel to the extension direction of the sliding guide rail structure. The two sets of drive devices 13 operate synchronously. The fixed end of the drive device 13 is set on the base 12, and the movable ends of the two drive devices 13 are respectively connected to the two sliders 182.

[0202] Preferably, the fixed end of the driving device 13 is disposed 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 part 183 protruding in a direction away from the material spreading body 11, and the movable end of the driving device 13 is connected to the first driving part 183.

[0203] With the above settings, it can be ensured that both sides of the material laying body 11 can be subjected to force simultaneously, ensuring the smooth movement of the material laying body 11. At the same time, by setting the driving device 13 to act directly on the slider 182, the driving device 13 is set close to the sliding guide rail structure, further avoiding the sliding guide rail structure from getting stuck, and further improving the smoothness of driving the material laying body 11.

[0204] In this embodiment, the driving device 13 can be any one or a combination of two or more of the following: hydraulic cylinder, air cylinder, and linear motor.

[0205] Preferably, in this embodiment, the driving device 13 is preferably a hydraulic cylinder.

[0206] In some specific embodiments, the first guide component 17 is a rolling guide rail structure, which includes a first track 171 and a roller 172 adapted to the first track 171.

[0207] Specifically, such as Figure 14 and Figure 15 As shown, in this embodiment, the first track 171 is mounted on the frame 4, and the top of the first track 171 is provided with a groove 1711. The roller 172 is mounted on the bottom of the base 12 through a rotating shaft. The roller 172 is disposed 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 within the groove 1711.

[0208] 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.

[0209] 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.

[0210] In some specific embodiments, the bottom of the groove 1711 is set to be planar, or it is set to be convex upward in the middle along the length direction of the groove 1711, or it is set to be concave downward in the middle along the length direction of the groove 1711. The outer peripheral wall of the roller 172 fits against the bottom of the groove 1711, and the groove wall of the groove 1711 extends upward and outward at an angle to enhance the limiting effect on the roller 172.

[0211] Preferably, in this embodiment, the rolling guide structure has at least two sets arranged at intervals along its extension direction perpendicular to it, so as to ensure the stability of the support for the base 12.

[0212] Preferably, in this embodiment, the rolling guide rail structure is provided in two sets, which are respectively located on the left and right sides of the bottom of the base 12 and between the base 12 and the frame 4. Each set of rolling guide rail structure is provided with at least two rollers 172 arranged at intervals along the extension direction of the first track 171, so as to further improve the support stability of the base 12.

[0213] In this embodiment, the filter cylinder 2 is disposed on the extension path of the first guide component 17 and spaced apart from the fabric spreading device 1; the two ends of the first track 171 are provided with limiting parts 1712 for limiting the roller 172, 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.

[0214] Specifically, when the roller 172 abuts against the limiting part 1712 at the front end of the first track 171, the front end of the material spreading body 11 on the base 12 is aligned with the filter cylinder 2, so that the extension path of the second guide component 18 corresponds to the filter cylinder 2, and the front end of the material spreading body 11 extends to align with the outer edge of the first side of the filter cylinder 2 at most.

[0215] Preferably, in this embodiment, when the roller 172 abuts against the limiting part 1712 at the rear end of the first track 171, the fabric spreading device 1 will clear at least part of the space above the discharge collection hopper 3.

[0216] Preferably, in this embodiment, when the roller 172 abuts against the limiting part 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 collection hopper 3 away from the filter cylinder 2.

[0217] In this embodiment, when each group of first guide components 17 is provided with multiple rollers 172, the rollers 172 abut against the limiting part 1712 at the front end of the first track 171. Specifically, the roller 172 at the front end abuts against the limiting part 1712 at the front end of the first track 171, and the roller 172 abuts against the limiting part 1712 at the rear end of the first track 171. Specifically, the roller 172 at the rear end abuts against the limiting part 1712 at the rear end of the first track 171.

[0218] In this embodiment, a front drive device 14 parallel to the extension direction of the rolling guide rail structure is provided between the frame 4 and the base 12. 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 entire fabric pushing and spreading device 1 to reciprocate along the rolling guide rail structure.

[0219] In this embodiment, the fixed end of the front drive device 14 is mounted on the frame 4, and the movable end is connected to the base 12.

[0220] In some preferred embodiments, two sets of front drive devices 14 are provided, and the two sets of front drive devices 14 operate synchronously. The two sets of front drive devices 14 are respectively located on the left and right sides of the base 12 and between the base 12 and the frame 4. This ensures that both sides of the base 12 can be subjected to force synchronously, thus ensuring the smooth operation of the base 12.

[0221] 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 an outwardly extending second drive part 121, and the movable end of the front drive device 14 is connected to the second drive part 121.

[0222] Preferably, in this embodiment, the front drive device 14 and the first track 171 are arranged close to each other and side by side.

[0223] In this embodiment, the front drive device 14 can be any one or a combination of two or more of the following: hydraulic cylinder, air cylinder, and linear motor.

[0224] Preferably, in this embodiment, the driving device 13 is preferably a hydraulic cylinder.

[0225] 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 during the movement of the base 12 and the material spreading body 11, the front end of the material spreading body 11 is always aligned with the first side of the filter cylinder 2.

[0226] In some specific embodiments, a material spreading pipe 112 is provided inside the material spreading body 11, and a material conveying pipe 15 communicating with the material spreading pipe 112 is provided outside the material spreading body 11. The material conveying pipe 15 is connected to the material spreading pipe 112 and is used to convey materials to the material spreading body 11. In order to accommodate the reciprocating motion of the material spreading body 11, the material conveying pipe 15 is generally set as a flexible hose. By setting the material conveying pipe as a flexible hose, the material conveying pipe can move forward and backward with the base and the material spreading body, without the need to install an additional pipe shaft with a steering function like a rigid pipe. This greatly reduces the complexity of the device and improves its durability.

[0227] In this embodiment, the rear end of the base 12 is provided with a clearance opening for avoiding the material conveying pipe 15 at the location corresponding to the material conveying pipe 15.

[0228] In this embodiment, the material spreading body 11 includes a housing 111 and a material spreading pipe 112 installed inside the housing 111. The rear end of the material spreading pipe 112 is connected to the rear side wall of the housing 111. The material spreading pipe 112 is provided with a plurality of pipes arranged at intervals along the feeding direction perpendicular to the material spreading body 11. Each material spreading pipe 112 is connected to a material conveying pipe 15.

[0229] The clearance opening is located at the rear end of the base 12, corresponding to the material conveying pipe 15. The extension length of the clearance opening along the feed direction perpendicular to the material spreading body 11 is greater than or equal to the layout range of the material conveying pipe 15 at the rear end of the material spreading body 11. By setting the clearance opening, the smoothness of the reciprocating movement of the material spreading body 11 can be further ensured.

[0230] In this embodiment, a method for laying materials in the above-mentioned dewatering equipment for water-containing materials is also provided. When laying materials, the material laying device 1 is first controlled to move along the first guide component 17 to the edge near the top of the filter cylinder 2; then the material laying body 11 is driven to reciprocate along the second guide component 18 above the filter cylinder 2, so that the filter cloth 71 is laid in layers in the filter cylinder 2 and the material is sprayed onto the filter cloth 71.

[0231] Specifically, when material needs to be spread onto the filter cloth 71, the front drive device 14 first drives the entire cloth spreading device 1 forward, bringing it close to the filter cylinder 2. The front end of the spreading body 11 on the base 12 corresponds directly 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 drive device 13 of the spreading body 11 is in the initial position. Then, the drive device 13 of the spreading body 11 drives the spreading body 11 to reciprocate between the first and second sides of the filter cylinder 2, causing the filter cloth 71 to be layered within the filter cylinder 2, and spreading the material between adjacent layers of filter cloth 71 during this process.

[0232] Preferably, in this embodiment, the front end of the spreading body 11 is provided with a pushing head 113. The pushing head 113 extends forward and downward from the front end face of the spreading body 11. The extension length of the pushing head 113 along the feed direction perpendicular to the spreading body 11 is greater than or equal to the length of the front end face of the spreading body 11. The front end of the pushing head 113 extends to a point lower than the spreading opening 1121 of the spreading body 11.

[0233] In this embodiment, when the roller 172 abuts against the limiting part 1712 at the rear end of the first track 171, the pusher 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 pusher head 113 and the base 12.

[0234] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A cloth pushing and laying device for a dewatering apparatus, configured to move back and forth between a first side of a filter cylinder (2) and a second side opposite thereto to fold a filter cloth (71), and to spray a material to be treated onto the filter cloth (71); the cloth pushing and laying device comprising a laying body (11), characterized in that, The main body of the paving material (11) includes: The housing (111) has an opening at its bottom; and, A material spreading pipe (112) is installed inside the housing (111), and the material spreading port (1121) of the material spreading pipe (112) is set inside the opening; A pusher head (113) extending forward and downward is provided on the front side wall of the housing (111); The first end of the pusher head (113) is connected to the material spreading body (11), and the second end of the pusher head (113) is set opposite to the first end of the pusher head (113). The second end of the pusher head (113) is lower than the material spreading opening (1121) at least when the pusher head (113) and the filter cloth (71) come into contact. During the feeding process of the material spreading body (11), the filter cloth (71) is pulled out from the roll roller (7) by the push head (113) and the material is laid on the filter cloth (71) below the material spreading body (11). At least when the pusher head (113) comes into contact with the filter cloth (71), the height difference between the second end of the pusher head (113) and the material laying port (1121) is greater than the thickness of the material laid on the filter cloth.

2. The fabric spreading device for a dewatering equipment according to claim 1, characterized in that, Along the feeding direction of the material spreading body (11), the material spreading pipe (112) is installed on the rear side wall of the housing (111); the opening is set on the bottom wall of the housing (111) near the front side wall of the housing (111).

3. The fabric spreading device for a dewatering equipment according to claim 2, characterized in that, The shell is a horizontally extending cuboid structure.

4. The fabric spreading and feeding device for a dewatering equipment according to claim 1, characterized in that, The pusher head (113) and the housing (111) are set as one piece. When the material spreading body (11) retracts, the material spreading body (11) is controlled to rise, or the entire pusher spreading device is controlled to rise, or the movable bottom plate of the filter cylinder is controlled to move downward so that the pusher head (113) avoids the material spread on the filter cloth. Alternatively, the pusher head (113) can rotate with the front wall of the housing (111). When the material spreading body (11) retracts, the pusher head (113) can be controlled to rotate upward so that the second end of the pusher head (113) is higher than the material on the filter cloth (71), thus preventing the pusher head (113) from scraping the material below the material spreading body (11).

5. The fabric spreading device for a dewatering equipment according to claim 2, characterized in that, An installation joint (16) is provided on the rear side wall of the housing (111), the installation joint (16) extends at least partially into the housing (111), and the material laying pipe (112) is sealed to the installation joint (16); The end of the mounting connector (16) away from the housing (111) is connected to the feed pipe (15).

6. The fabric spreading and feeding device for a dewatering equipment according to claim 5, characterized in that, The feed pipe (15) is a flexible hose.

7. The fabric spreading and feeding device for a dewatering equipment according to any one of claims 1 to 6, characterized in that, The material outlet (1121) extends vertically downward from the opening, at least to the level of the bottom of the opening.

8. The fabric spreading and laying device for a dewatering equipment according to claim 7, characterized in that, The lower end of the material outlet extends to below the bottom of the opening.

9. The fabric spreading and laying device for a dewatering equipment according to claim 8, characterized in that, The opening extends along the feeding direction perpendicular to the material spreading body (11), the material spreading tube (112) extends along the feeding direction of the material spreading body (11), and the material spreading port (1121) of the material spreading tube (112) bends downward from the opening.

10. The fabric spreading device for a dewatering equipment according to claim 9, characterized in that, The material laying pipe includes an input section, a variable diameter section, and an output section, each with a channel. The first end of the variable diameter section is connected to the input section, and the second end of the variable diameter section is connected to the output section. From the first end to the second end, the width of the channel of the variable diameter section gradually increases, and the height of the channel gradually decreases. The material outlet (1121) bends downward from the end of the output section away from the diameter-changing section and extends into the opening.

11. The fabric spreading device for a dewatering equipment according to claim 10, characterized in that, The vertical cross-section of the input channel is the same as the vertical cross-section of the variable diameter channel at its first end; the vertical cross-section of the output channel is the same as the vertical cross-section of the variable diameter channel at its second end.

12. The fabric spreading device for a dewatering equipment according to claim 11, characterized in that, The vertical cross-section of the variable diameter section at the first end is circular; the vertical cross-section of the variable diameter section at the second end is rectangular.

13. The fabric spreading device for a dewatering equipment according to claim 12, characterized in that, The upper end of the material outlet (1121) is set as an arc shape that smoothly transitions to the output section, and the lower end is set as a rectangle with the same vertical cross-section as the vertical cross-section of the output section channel.

14. The fabric spreading and feeding device for a dewatering equipment according to any one of claims 1 to 6, characterized in that, The material spreading tube (112) includes a plurality of tubes arranged in a horizontal direction perpendicular to the feeding direction of the material spreading body (11); The opening is provided with multiple openings corresponding one-to-one with the material inlets (1121) of each material laying pipe (112), and the material inlets (1121) of each material laying pipe (112) are respectively installed in the corresponding openings; or, The opening is a strip-shaped opening extending in a direction 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.

15. A dewatering device, comprising a support frame, characterized in that, The support frame is equipped with a fabric pushing and spreading device for a dewatering equipment as described in any one of claims 1 to 14, and a drive device (13) for driving the fabric pushing and spreading device to reciprocate.

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