Pressing assembly for a dewatering apparatus and dewatering apparatus

Abstract

The application provides a cloth pressing assembly for a dewatering device and the dewatering device, and the cloth pressing assembly for the dewatering device comprises a pressing rod for pressing filter cloth on the top of a filter cylinder; and a plane parallel to the top of the filter cylinder is arranged on the pressing rod used for abutting with the filter cloth in a horizontal direction. The plane parallel to the top of the filter cylinder is arranged on the pressing rod used for abutting with the filter cloth, so that when the pressing rod presses the filter cloth on the top of the filter cylinder, the filter cloth is clamped and fixed by the plane on the bottom of the pressing rod and the plane on the top of the filter cylinder, the fixing effect on the filter cloth can be improved, and the situation that the end of the filter cloth is loose in the process of pushing cloth and paving material can be avoided.

Description

Technical Field

[0001] This invention belongs to the field of sludge treatment technology, specifically relating to a cloth pressing assembly for dewatering equipment, and also to a dewatering equipment equipped with the cloth pressing assembly. 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 in a stacking and pressing device is typically an ultra-long, continuous filter cloth. During operation, multiple layers of filter cloth need to be stacked and spread, with sludge evenly distributed between them. When stacking and spreading the filter cloth, the stacking and pressing device requires a pressing assembly to secure the filter cloth. This assembly consists of two sets of pressing assemblies, one at the front and one at the back. Specifically, the front pressing assembly first presses the near end of the filter cloth. The sludge spreading mechanism's outlet pushes the filter cloth forward, applying a horizontal force to flatten it. When the sludge spreading mechanism reaches its furthest limit, the rear pressing assembly presses down on the furthest end of the filter cloth, and then the sludge spreading mechanism retracts. As the outlet of the sludge spreading mechanism exits the filter cylinder, the front pressing assembly is pulled out from both sides of the filter cloth and then pressed onto the next layer of filter cloth.

[0005] Existing stacking and pressing devices typically use pressure rods to compress the filter cloth in the front pressing assembly. However, the pressure rods in existing front pressing assemblies are usually cylindrical. For example, Chinese utility model patent application number CN202023099235.0 discloses a fixing device for laying stacked filter cloth, and as shown in the accompanying drawings, its pressure rod is a thin cylindrical rod. In this design, the contact area between the pressure rod and the filter cloth is small, resulting in poor fixing of the filter cloth. During the forward feeding process of the sludge spreading device, the ends of the filter cloth are prone to loosening, leading to poor filter cloth laying effect.

[0006] Therefore, designing a cloth pressing assembly for dewatering equipment that can improve the fixing effect of the filter cloth and prevent the end of the filter cloth from loosening during the cloth pushing process has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0007] This invention provides a cloth pressing assembly for dewatering equipment, which solves the problem of poor fixation effect of existing cloth pressing assemblies on filter cloth.

[0008] Another objective of this invention is to solve the problem that the end of the pressure bar away from the drive transmission device tends to lift up when the filter cloth is pressed by setting the drive transmission device and the pressure bar to be sleeved together.

[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 cloth pressing assembly for a dewatering device includes a pressing bar for pressing a filter cloth against the top of a filter cylinder; the pressing bar, extending horizontally, has at least one plane parallel to the top of the filter cylinder at the point where it contacts the filter cloth.

[0011] Furthermore, the pressure bar extends horizontally along the length direction perpendicular to the filter cloth; the vertical cross-section of the pressure bar at the point of contact with the filter cloth is set as rectangular, arc-shaped, or trapezoidal.

[0012] Furthermore, the vertical section of the pressure bar used to contact the filter cloth has a width in the vertical direction that is less than or equal to the width in the horizontal direction; preferably, the plane of the pressure bar used to contact the filter cloth is provided with anti-slip texture; preferably, the top of the filter cylinder is provided with anti-slip texture corresponding to the pressure bar.

[0013] Furthermore, when the pressure rod is in the first position, it presses the filter cloth tightly against the top of the filter cylinder; when the pressure rod is in the second position, the horizontal projection of the pressure rod falls outside the filter cloth; the drive transmission device for moving the pressure rod between the first and second positions is sleeved with the pressure rod.

[0014] Furthermore, the drive transmission device includes: a transmission mechanism, including a connecting rod and a connecting frame rod hinged to the connecting rod, the connecting frame rod including at least two sets of rods of equal length arranged at intervals along the length direction of the connecting rod, forming a parallelogram structure; the connecting rod is sleeved on the pressure rod, or the pressure rod is sleeved on the connecting rod; a driving member is disposed at one end of the transmission mechanism of the parallelogram structure, reciprocates along a direction parallel to the connecting rod, and is transmittedly connected to the pressure rod and the connecting frame rod respectively, driving the connecting frame rod to rotate during the sliding of the pressure rod along the connecting rod; preferably, the connecting rod is cylindrical, sleeved in the middle of the pressure rod, and slidable along the length direction of the pressure rod, the length of the connecting rod being less than the length of the pressure rod.

[0015] Furthermore, the driving component includes: a slide rail extending in a direction perpendicular to the pressure rod, a sliding sleeve provided at the first end of the pressure rod, the sliding sleeve being fitted onto the slide rail; an abutment portion corresponding to the side of the connecting rod away from the second end of the pressure rod; during the process of the driving component driving the pressure rod to slide towards the second end of the pressure rod, the abutment portion slides in cooperation with the side of the connecting rod away from the second end of the pressure rod, driving the connecting rod to rotate towards the second end of the pressure rod, and driving the pressure rod to slide along the slide rail through the connecting rod; preferably, at least one connecting rod is provided with an elastic element for driving the connecting rod to rotate towards the first end of the pressure rod between it and the support frame of the parallelogram-shaped transmission mechanism; preferably, when the pressure rod is in the first position, the angle between the connecting rod and the horizontal direction is less than or equal to 45°.

[0016] Furthermore, during the process of the driving component driving the pressure rod to slide towards the second end of the pressure rod: in the first working state, the abutting part is spaced apart from the connecting rod; in the second working state, the abutting part slides with the side of the connecting rod away from the second end of the pressure rod, driving the connecting rod to rotate towards the second end of the pressure rod.

[0017] Furthermore, when the driving member is in the first working state, the horizontal distance between the sliding sleeve and the connecting rod is greater than or equal to the horizontal distance between the abutment and the connecting rod; preferably, when the driving member is in the first working state, the connecting rod extends obliquely upward toward the second end of the pressure rod; the driving member is disposed on the side of the parallelogram structure transmission mechanism away from the second end of the pressure rod; along the length direction of the connecting rod, the slide rail and the abutment are offset, the slide rail is disposed at the end of the driving member close to the pressure rod, and the abutment is disposed at the end of the driving member away from the pressure rod.

[0018] Furthermore, the connecting rod is positioned above the support frame, and the support frame is provided with a support frame that protrudes towards the connecting rod and extends in a direction parallel to the connecting rod; the vertical distance between the second end of the pressure rod and the top of the filter cylinder is less than or equal to the vertical distance between the first end of the pressure rod and the top of the support frame; preferably, the driving member is slidably mounted on the support frame.

[0019] In the above scheme, the second end of the pressure rod is the end closer to the filter cloth, and the "direction of the second end of the pressure rod" is the "direction closer to the filter cloth", which is the "direction closer to the filter cylinder"; the first end of the pressure rod is the end away from the filter cloth, and the "direction of the first end of the pressure rod" is the "direction away from the filter cloth", which is the "direction away from the filter cylinder".

[0020] The present invention also provides a dewatering device, including a filter cylinder. A cloth-pushing and laying device is provided at the top of the filter cylinder for layering and laying filter cloth inside the filter cylinder and spraying material onto the filter cloth. A cloth-pressing assembly for the dewatering device is installed on the side of the filter cylinder near the cloth-pushing and laying device. A downwardly extending, vertically rotatable cloth-pushing head is provided at the front end of the cloth-pushing and laying device along the feeding direction. The first end of the cloth-pushing head is connected to the front end of the cloth-pushing and laying device along the feeding direction. Before the cloth-pushing and laying device feeds, the pressure rod of the cloth-pressing assembly presses the filter cloth tightly onto the filter cylinder. During the feeding process of the cloth-pushing and laying device, the cloth-pushing head abuts against the filter cloth, and the second end of the cloth-pushing head opposite the first end rotates downward. The distance between the bottom of the second end of the cloth-pushing head and the top of the filter cylinder is greater than the distance between the top of the pressure rod and the top of the filter cylinder.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0022] 1. By setting the part of the pressure rod that abuts against the filter cloth to be a plane parallel to the top of the filter cylinder, the pressure rod clamps and fixes the filter cloth by the plane at the bottom of the pressure rod and the plane at the top of the filter cylinder when pressing the filter cloth against the top of the filter cylinder. Compared with the cylindrical pressure rod in the prior art, the pressure rod in the present invention can achieve a better clamping effect and avoid the situation of the filter cloth end loosening.

[0023] 2. By setting the drive transmission device and the pressure rod to be sleeved together, the force applied by the drive transmission device to the pressure rod can be applied to a section of the pressure rod instead of a point on the pressure rod. This allows the pressure rod to move and press down as a whole, avoiding the situation where the end of the pressure rod away from the drive transmission device tends to lift up when pressing the filter cloth, thus improving the pressing effect on the filter cloth.

[0024] 3. This invention, by setting up a rotating cooperation between the pusher head and the material spreading body, allows the pusher head to rotate downwards when the material spreading body moves forward, so that the front end of the pusher head is lower than the material spreading opening, creating a height difference between the pusher head and the material spreading opening that is greater than the thickness of the material spread on the filter cloth. When the material spreading body moves backwards, the pusher head can be controlled to rotate upwards, so that the front end of the pusher head is higher than the material on the filter cloth. This prevents the pusher head from scraping the material below the material spreading body, avoids the material from sticking to the pusher head, improves the leveling effect of the material, and at the same time, helps to increase the speed of the material spreading body's retraction and increase the spreading rate.

[0025] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0026] 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:

[0027] Figure 1 This is a cross-sectional schematic diagram of the dehydration equipment in an embodiment of the present invention;

[0028] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of point B in the middle;

[0029] Figure 3 This is a schematic diagram of the sludge dewatering equipment in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the installation structure of the fabric pressing assembly in an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of the first fabric pressing assembly when a connecting rod is provided in an embodiment of the present invention;

[0032] Figure 6 This is a schematic diagram of the structure of the first fabric pressing assembly when two connecting rods are set in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the structure of the first pressure cloth assembly when the pressure bar is in the second position in an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of the structure of the first pressing assembly when the driving component switches to the second working state during the pressing process in an embodiment of the present invention;

[0035] Figure 9 This is a schematic diagram of the structure of the first pressure cloth assembly when the pressure bar is in the first position in an embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the structure of the first pressing fabric assembly in the middle position during the retraction process in an embodiment of the present invention;

[0037] Figure 11 This is a cross-sectional schematic diagram of the main body of the material in an embodiment of the present invention;

[0038] Figure 12 This is an embodiment of the present invention. Figure 11 Enlarged view of point A in the middle;

[0039] Figure 13 This is a schematic diagram of the structure when the fabric pusher is in the first position in an embodiment of the present invention;

[0040] Figure 14 This is a schematic diagram of the structure when the fabric pusher is in the second position in an embodiment of the present invention.

[0041] Description of main components in the diagram:

[0042] 1. Fabric spreading device; 11. Spreading body; 111. Shell; 112. Spreading pipe; 1121. Spreading port; 113. Fabric pushing head; 1133. Reinforcing plate; 1134. Solid column; 2. Filter cylinder; 4. Frame; 41. Guide roller; 5. First pressing assembly; 51. Pressing rod; 52. Drive transmission device; 521. Support frame; 5211. Support frame; 522. Connecting rod; 523. Connecting... 524. Rod; 5241. Drive component; 5241. Abutment part; 525. Elastic component; 53. Power source; 54. Guide assembly; 541. Slide rail; 542. Sliding sleeve; 55. Limiting component; 551. First limiting component; 552. Second limiting component; 55-1. First plate; 55-2. Second plate; 55-3. Reinforcing rib; 6. Second pressing assembly; 7. Cloth roll roller; 71. Filter cloth; 8. Extrusion equipment.

[0043] 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

[0044] 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.

[0045] 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.

[0046] 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.

[0047] like Figures 1 to 14 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.

[0048] During the material laying process, two sets of cloth pressing assemblies are used to fix the filter cloth 71.

[0049] 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.

[0050] 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.

[0051] The filter cloth 71 is wound into a roll 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] It also includes an extrusion device 8, which is located above the filter cylinder 2 and is used to extrude the material.

[0057] 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.

[0058] In this embodiment, the sludge dewatering equipment is preferably used for solid-liquid separation of sludge with high water content.

[0059] 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.

[0060] 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.

[0061] Example 1

[0062] like Figures 1 to 10 As shown in the embodiment of the present invention, a cloth pressing assembly of a dewatering device is introduced, which realizes the action of the cloth pressing assembly driven by a power source 53 to fix the filter cloth 71 on the side of the filter cylinder 2 near the sludge spreading mechanism, that is, to fix the filter cloth 71 at the first side of the filter cylinder 2.

[0063] In this embodiment, the fabric pressing assembly is specifically the first fabric pressing assembly.

[0064] like Figures 4 to 10 As shown, in this embodiment, the pressing assembly includes a drive transmission device 52 and a pressing rod 51 mounted on the drive transmission device 52. The pressing rod 51 has a first position and a second position. The first position is the position where the pressing rod 51 presses the filter cloth 71 onto the filter cylinder 2. The second position is the position where the projection of the pressing rod 51 in the horizontal direction falls outside the filter cloth 71. The drive transmission device 52 is used to drive the pressing rod 51 to move between the first position and the second position.

[0065] The drive transmission device 52 includes a support frame 521, a connecting rod 522, a connecting rod 523, and a drive component 524. One end of the connecting rod 522 is hinged to the support frame 521, and the other end of the connecting rod 522 is hinged to the connecting rod 523. The hinge axis between the connecting rod 522 and the support frame 521 and the hinge axis between the connecting rod 522 and the connecting rod 523 are parallel to each other. The connecting rod 523 is cylindrical and is sleeved on the pressure rod 51. The connecting rod 523 is slidable along the length direction of the pressure rod 51.

[0066] The driving component 524 and the pressure rod 51 are slidably connected by a guide assembly 54. The extension direction of the guide assembly 54 is parallel to the rotation surface of the connecting rod 522, and the guide assembly 54 is angled to the connecting rod 523. The moving path of the driving component 524 is parallel to the extension direction of the connecting rod 523. Driven by the power source 53, the driving component 524 reciprocates in the direction of approaching and moving away from the filter cloth. During the process of the driving component 524 driving the pressure rod 51 to slide along the connecting rod 523, it drives the connecting rod 522 to rotate. The connecting rod 523 slides along the pressure rod 51, causing the pressure rod 51 to slide along the guide assembly 54.

[0067] In this embodiment, the "direction closer to and away from the filter cloth" is the same as the "direction closer to and away from the filter cylinder". Therefore, since the guide assembly 54 and the connecting rod 523 are angled, during the movement of the drive member 524 towards the filter cloth, the drive member 524 pushes the pressure rod 51 to slide along the connecting rod 523 via the guide assembly 54, feeding it towards the filter cloth. During the rotation of the drive frame rod 522, under the limiting and guiding effect of the guide assembly 54, the connecting rod 523 drives the pressure rod 51 to translate along the guide assembly 54 without rotation, thus changing the distance between the connecting rod 523 and the support frame 521. Under the drive of the connecting rod 523, the pressure rod 51 presses the filter cloth 71 tightly onto the filter cylinder 2.

[0068] With the above configuration, a power source 53 can drive the drive component 524 to reciprocate in the direction of approaching and moving away from the filter cylinder 2. This enables the pressure rod 51 to be fed and pressed down in the direction of approaching the filter cylinder 2, and the pressure rod 51 to be retracted and lifted in the direction of moving away from the filter cylinder 2. This allows the pressure rod 51 to move between the first position and the second position, reducing the power source 53 used to drive the pressure rod 51, which helps to reduce the cost of the equipment and simplifies the control system of the fabric pressing assembly.

[0069] In this embodiment, by setting the connecting rod to a cylindrical shape, the force applied to the pressure rod by the drive transmission device can be applied to a section of the pressure rod instead of a point on the pressure rod. This allows the pressure rod to move and press down as a whole, preventing the end of the pressure rod away from the drive transmission device from easily lifting up when pressing the filter cloth, thus improving the pressing effect on the filter cloth.

[0070] In this embodiment, the rotation surface of the connecting rod 522 is the plane where the rotation center of the connecting rod 522 is located, that is, the plane perpendicular to the hinge axis between the connecting rod 522 and the support frame 521.

[0071] In this embodiment, the support frame 521 of the drive transmission device 52 can be part of the frame 4 used to support the fabric spreading device 1, or it can be set on the filter cylinder 2, or it can be set separately.

[0072] In this embodiment, regarding the arrangement of the connecting rod 523 and the support frame 521 of the drive transmission device 52, the pressure rod 51 can be set above the support frame 521 or below the support frame 521. It is only necessary to ensure that when the connecting rod 522 rotates towards the filter cylinder 2, the connecting rod 523 can drive the pressure rod 51 to press down and press the filter cloth 71 onto the filter cylinder 2, and when the connecting rod 522 rotates away from the filter cylinder 2, the connecting rod 523 can drive the pressure rod 51 to lift up.

[0073] If the pressure rod 51 is positioned above the support frame 521, then when the pressure rod 51 moves to the first position, the connecting rod 522 is inclined from bottom to top towards the filter cylinder 2. If the pressure rod 51 is positioned below the support frame 521, then when the pressure rod 51 moves to the first position, the connecting rod 522 is inclined from bottom to top away from the filter cylinder 2. With the above arrangement, it can be ensured that when the connecting rod 523 moves to the first position, the pressure rod 51 feeds to the filter cylinder 2 to the maximum length, and that the drive transmission device 52 can convert the force provided by the power source 53 into the pressing force of the pressure rod 51 on the filter cloth 71, thereby ensuring the pressing effect on the filter cloth 71.

[0074] In some preferred embodiments, the pressure rod 51 is positioned above the support frame 521, thereby enabling the connecting rod 523 to apply force to the pressure rod 51 closer to the filter cylinder 2, further improving the pressing effect on the filter cloth 71.

[0075] In this embodiment, regarding the location of the drive transmission device 52, the connecting rod 523 of the drive transmission device 52 can be located above or below the upper edge of the filter cylinder 2, as long as the working end of the pressure rod 51 extends above the upper edge of the filter cylinder 2. The working end of the pressure rod 51 is the end of the pressure rod 51 used to press the filter cloth 71.

[0076] In some preferred embodiments, the drive transmission device 52 is positioned near the upper edge of the filter cylinder 2. Specifically, the support frame 521 is positioned below the upper edge of the filter cylinder 2, and the connecting rod 523 is positioned above the upper edge of the filter cylinder 2. This not only improves the force application effect of the drive transmission device 52 on the pressure rod 51, but also makes the structure of the sludge dewatering equipment more compact.

[0077] In some preferred embodiments, the pressure rod 51 is configured as a straight rod parallel to the top of the filter cylinder 2 and extending along the length direction perpendicular to the filter cloth 71. This increases the displacement length of the connecting rod 523 in the direction of approaching the filter cylinder 2 as the drive member 524 moves toward the filter cylinder 2, thereby improving the pressing effect of the pressure rod 51 on the filter cloth 71.

[0078] In this embodiment, the "length direction of filter cloth 71" specifically refers to the extension direction of filter cloth 71 at the top of filter cylinder 2, that is, the extension direction from the first side to the second side of filter cylinder 2.

[0079] In some possible embodiments, the power source 53 can be a telescopic device, specifically a cylinder, a hydraulic cylinder, or a linear motor, as long as it can drive the drive component 524 to move back and forth in the direction of approaching and moving away from the filter cylinder 2.

[0080] Preferably, in some specific embodiments, the power source 53 is configured as a hydraulic cylinder, which is fixed on the support frame 521. The working end of the hydraulic cylinder is connected to the drive member 524, and is used to drive the drive member 524 to reciprocate in the direction of approaching and moving away from the filter cylinder 2. The extension direction of the hydraulic cylinder is parallel to the extension direction of the pressure rod 51.

[0081] like Figures 7 to 10 As shown, in some specific embodiments, the driving member 524 is disposed at the end of the pressure rod 51 away from the filter cylinder 2. On at least a portion of the moving path of the driving member 524 towards the filter cylinder 2, the driving member 524 abuts and slides against the side of the connecting rod 522 away from the filter cylinder 2, driving the connecting rod 522 to rotate towards the filter cylinder 2. Thus, the horizontal displacement and vertical displacement of the pressure rod 51 can be performed simultaneously or sequentially.

[0082] Preferably, in this embodiment, considering the pressing method of the pressing assembly, during pressing, the driving member 524 can first drive the pressing rod 51 to feed towards the filter cylinder 2. After feeding a certain length, the driving member 524 abuts against the side of the connecting rod 522 away from the filter cylinder 2. The driving member 524 continues to move towards the filter cylinder 2, driving the connecting rod 522 to rotate towards the filter cylinder 2, so that the pressing rod 51 presses the filter cloth 71 tightly onto the filter cylinder 2, ensuring that the pressing rod 51 has sufficient length to press the filter cloth 71 tightly.

[0083] In this embodiment, the driving member 524 is disposed at the end of the pressure rod 51 away from the filter cloth 71, and is provided with an abutment portion 5241 corresponding to the side of the connecting rod away from the filter cloth; on at least a portion of the moving path of the driving member 524 toward the filter cloth, the abutment portion 5241 slides with the connecting rod 522, driving the connecting rod 522 to rotate toward the filter cloth 71.

[0084] In this embodiment, during the process of the driving member 524 moving towards the filter cloth, there are a first working state and a second working state. Specifically, in the first working state, the abutting part 5241 is spaced apart from the connecting rod; in the second working state, the abutting part 5241 slides with the connecting rod, driving the connecting rod to rotate towards the filter cloth.

[0085] During the movement of the driving component 524 towards the filter cylinder 2, in the first working state, the driving component 524 only drives the pressure rod 51 to advance towards the filter cylinder 2. In the second working state, during the same movement, the driving component 524 not only drives the pressure rod 51 towards the filter cylinder 2 but also drives the connecting rod 522 to rotate towards the filter cylinder 2, thereby pressing the pressure rod 51 downwards via the connecting rod 523. Therefore, by setting the path length of the driving component 524 during the first working state, the length of the pressure rod 51 advancing towards the filter cylinder 2 can be increased or decreased.

[0086] In this embodiment, when the drive unit is in the first working state, the horizontal distance between the sliding sleeve and the end of the connecting rod away from the filter cylinder is greater than or equal to the horizontal distance between the abutment part 5241 and the connecting rod.

[0087] Preferably, when the drive unit is in the first working state, the connecting rod extends obliquely upwards towards the filter cylinder.

[0088] In this embodiment, the slide rail and the abutment part 5241 are misaligned along the length of the connecting rod. The slide rail is located at the end of the drive member closer to the filter cylinder, and the abutment part 5241 is located at the end of the drive member away from the filter cylinder.

[0089] In this embodiment, the driving component 524 and the pressure rod 51 are connected by a guide assembly 54. The guide assembly 54 is preferably disposed in the rotation surface of the connecting rod 522, and the extension direction of the guide assembly 54 is set at an angle to the connecting rod 523.

[0090] Specifically, the guide assembly 54 includes a slide rail 541 disposed on the drive member 524 or at the end of the pressure rod 51 away from the filter cylinder 2, and a sliding sleeve 542 disposed on the end of the pressure rod 51 away from the filter cylinder 2 or on the drive member 524, corresponding to the slide rail 541, with the sliding sleeve 542 sleeved on the slide rail 541.

[0091] Therefore, when the driving member 524 moves toward the filter cylinder 2, the driving member 524 pushes the pressure rod 51 to slide along the connecting rod 523 toward the filter cylinder 2 through the guide assembly 54. During the process of the driving member 524 driving the connecting rod 522 to rotate, the connecting rod 523 drives the pressure rod 51 to move along the slide rail 541, thereby guiding the displacement of the pressure rod 51 in the vertical direction.

[0092] Preferably, in this embodiment, the slide rail 541 is mounted on the drive member 524, and the sliding sleeve 542 is mounted on the end of the pressure rod 51 away from the filter cylinder 2.

[0093] Preferably, in this embodiment, the extension direction of the slide rail 541 is perpendicular to the connecting rod 523.

[0094] In some specific embodiments, the support frame 521 is provided with a support frame 5211 that protrudes toward the connecting rod 523 and extends in a direction parallel to the connecting rod 523. The driving member 524 is slidably disposed on the support frame 5211, and the support frame 5211 provides support and guidance for the driving member 524.

[0095] In some possible embodiments, the connecting rod is positioned above the support frame, and the vertical distance between the end of the pressure rod near the filter cylinder and the top of the filter cylinder is less than or equal to the vertical distance between the end of the pressure rod away from the filter cylinder and the top of the support frame. This ensures that the connecting rod can drive the pressure rod to press the filter cloth on the filter cylinder firmly.

[0096] Preferably, when the pressure bar presses the filter cloth against the top of the filter cylinder, the end of the pressure bar away from the filter cylinder abuts against the top of the support frame, thereby further improving the horizontality of the pressure bar and enhancing the pressing effect on the filter cloth.

[0097] In this embodiment, when the pressure rod is in the first position, the connecting rod and the support frame are misaligned in the length direction of the pressure rod to avoid mutual interference.

[0098] Preferably, the connecting rod 522 includes a first rod portion and a second rod portion sandwiched between the two sides of the connecting rod 523, and the support frame 5211 extends at least partially between the first rod portion and the second rod portion.

[0099] The driving member 524 includes a first abutting part and a second abutting part corresponding to the first rod part and the second rod part respectively, and there is a gap between the first abutting part and the second abutting part corresponding to the support frame 5211.

[0100] In some specific embodiments, the upper ends of the first and second rod portions of the connecting rod 522 are respectively hinged to the left and right sides of the connecting rod 523, and the lower ends of the first and second rod portions are respectively hinged to the left and right sides of the support frame 521. A gap is formed between the first and second rod portions. The support frame 5211 is disposed at the gap between the first and second rod portions, protrudes upward from the support frame 521, and extends along the length direction of the connecting rod 523. The driving member 524 is disposed on the top of the support frame 5211 and slides in cooperation with the top of the support frame 5211.

[0101] The driving member 524 extends along the length of the support frame 5211. The end of the driving member 524 near the filter cylinder 2 is provided with a slide rail 541 extending upward in the vertical direction. The end of the driving member 524 away from the filter cylinder 2 is provided with a first abutting part and a second abutting part extending downward from the left and right sides of the support frame 5211. The first abutting part and the second abutting part correspond to the side of the first rod part and the second rod part away from the filter cylinder 2, respectively.

[0102] Preferably, in this embodiment, the surface on the drive member 524 that abuts against the connecting rod 522 is set as an arc-shaped surface.

[0103] Specifically, at least one side of the first abutting portion and the second abutting portion opposite to the first rod portion and the second rod portion is set as an arc-shaped surface, which can improve the smoothness of the drive member 524 driving the connecting rod 522.

[0104] The connecting rod 522 can be set as one or a group, or multiple rods or groups can be arranged at intervals along the length direction of the connecting rod 523. When the connecting rod 522 is set as multiple or groups, each connecting rod 522 is of equal length and parallel to each other.

[0105] Specifically, the connecting rod 522 is provided with multiple rods spaced apart along the length direction of the connecting rod 523. Each connecting rod 522 is of equal length and parallel to each other. The multiple connecting rods 522 can be multiple first rod sections or second rod sections. Alternatively, the connecting rods 522 are provided with multiple groups of rods spaced apart along the length direction of the connecting rod 523. Each group of connecting rods 522 is of equal length and parallel to each other. Each group of connecting rods 522 includes a first rod section and a second rod section sandwiched between the two sides of the connecting rod 523.

[0106] Preferably, in this embodiment, the connecting rod 522 is set in multiple groups, which can improve the smoothness of the connecting rod 523 driving the pressure rod 51 and ensure the parallelism between the connecting rod 523 and the support frame 521. Thus, during the rotation of the connecting rod 522, the connecting rod 523 only pulls down or lifts the pressure rod 51.

[0107] In some specific embodiments, the connecting rod 522 is provided with two sets of parallel and equal lengths, which are respectively connected between the two ends of the connecting rod 523 and the support frame 521, forming a transmission mechanism with a parallelogram structure on the support frame 521 to ensure the reliability of driving the pressure rod 51.

[0108] In some preferred embodiments, when the pressure bar is in the first position, the angle between the connecting rod and the horizontal direction is less than or equal to 45°, thereby enabling the parallelogram-shaped transmission mechanism to convert more of the driving force of the driving member on the connecting rod into downward pressure on the pressure bar, thus improving the pressing effect on the filter cloth.

[0109] In some possible embodiments, the drive transmission device 52 further includes an elastic element 525 for driving the connecting rod 522 to rotate away from the filter cylinder 2, the elastic element 525 being disposed between at least one connecting rod 522 and the support frame 521.

[0110] Preferably, the elastic element 525 is disposed between any set of connecting rods 522 and support frame 521.

[0111] In this embodiment, the elastic element 525 can be a torsion spring located at the hinge shaft of the connecting rod 522, or a compression spring or tension spring located between the connecting rod 522 and the support frame 521. It only needs to be able to drive the connecting rod 522 to rotate away from the filter cylinder 2.

[0112] like Figure 5 and Figure 6 As shown, in some specific embodiments, the elastic element 525 is configured as a spring-type telescopic rod, which is located on the side of the connecting rod 522 near the filter cylinder 2. One end of the spring-type telescopic rod is hinged to the support frame 521, and the other end is hinged to the connecting rod 522.

[0113] As the driving component 524 drives the connecting rod 522 to rotate closer to the filter cylinder 2, the spring-type telescopic rod retracts, and the spring inside the spring-type telescopic rod stores force. As the driving component 524 moves away from the filter cylinder 2, the spring-type telescopic rod extends, causing the connecting rod 522 to return to its original position. During this process, the connecting rod 523 drives the pressure rod 51 to move upward.

[0114] Preferably, in some possible embodiments, the above-mentioned pressing assembly is disposed on the first side of the filter cylinder 2 near the pushing and spreading device 1.

[0115] Before the fabric spreading device 1 moves from the first side of the filter cylinder 2 to the second side away from the fabric spreading device 1, the fabric pressing assembly presses the filter cloth 71 onto the filter cylinder 2. During the retraction of the fabric spreading device 1 from the second side of the filter cylinder 2, the drive component 524 moves away from the filter cylinder 2, and the fabric spreading device 1 limits the lifting height of the pressure rod 51 during the extraction process from the filter cloth 71.

[0116] Specifically, such as Figures 7 to 10 As shown, during the process of the fabric pushing and spreading device 1 retracting from the second side of the filter cylinder 2, the driving component 524 is controlled to move away from the filter cylinder 2, pulling the pressure rod 51 out of the filter cloth 71. During this process, the elastic component 525 drives the connecting rod 522 to rotate away from the filter cylinder 2, and the connecting rod 523 drives the pressure rod 51 to rise. When the pressure rod 51 rises to abut against the bottom of the fabric pushing and spreading device 1, the connecting rod 523 stops rising under the reaction force of the pressure rod 51, while the pressure rod 51 continues to be pulled outward under the drive of the driving component 524. When the pressure rod 51 is completely pulled out of the fabric pushing and spreading device 1, the elastic component 525 drives the connecting rod 522 to continue rotating away from the filter cylinder 2, so that the pressure rod 51 rises to the initial position. Thus, it is possible to avoid lifting the end of the filter cloth 71 near the pusher and spreading device 1 too high during the process of the pressure rod 51 moving to the second position. The pressure rod 51 will lift the end of the filter cloth 71 near the pusher and spreading device 1 to the bottom of the pusher and spreading device 1, thus ensuring the flatness of the material on the filter cloth 71.

[0117] In this embodiment, before the pusher head 113 of the pusher fabric spreading device 1 moves to the first side, the pressure rod 51 can be completely pulled out from both sides of the pusher fabric spreading device 1.

[0118] like Figure 6 As shown, specifically in this embodiment, the parallelogram-shaped transmission mechanism is vertically arranged, that is, the support frame 521 and the connecting rod 523 are in the same vertical plane, and the two parallel connecting rods 522 are arranged in a direction away from the filter cylinder 2. The connecting rod 523 extends along a length direction perpendicular to the filter cloth 71, that is, the vertical plane in which the parallelogram-shaped transmission mechanism is located is perpendicular to the length direction of the filter cloth 71.

[0119] In this embodiment, the connecting rods 522 and the support frame 521, and the connecting rods 522 and the connecting rods 523 are all hinged. The hinge axes are parallel to each other. The vertical plane of the transmission mechanism of the parallelogram structure is a plane perpendicular to the hinge axis.

[0120] The connecting rod 523 is parallel to the top of the filter cylinder 2. Specifically, it extends in the horizontal direction.

[0121] The connecting rod 523 is cylindrical, and the pressure rod 51 is a straight rod extending horizontally and parallel to the connecting rod 523. The radial cross-section of the pressure rod 51 has the same shape as the inner circumference of the radial cross-section of the connecting rod 523. The length of the pressure rod 51 is greater than the length of the connecting rod 523. The pressure rod 51 passes through the connecting rod 523 from the end away from the filter cylinder 2, and a sliding sleeve 542 extending vertically is provided at the end of the pressure rod 51 away from the filter cylinder 2.

[0122] The driving component 524 is located at the end of the parallelogram-shaped transmission mechanism away from the filter cylinder 2. The driving component 524 is provided with a slide rail 541 extending in the vertical direction, and the sliding sleeve 542 is sleeved on the slide rail 541.

[0123] The elastic element 525 is located at one end of the parallelogram-shaped transmission mechanism near the filter cylinder 2. It is a spring-type telescopic rod, with one end hinged to the connecting rod 522 near the filter cylinder 2 and the other end hinged to the support frame 521.

[0124] When the pressure rod 51 is in the second position, the driving member 524 and the connecting rod 522 are spaced apart. The driving member 524 first drives the pressure rod 51 to move along the connecting rod 523 towards the filter cylinder 2.

[0125] When the driving member 524 moves to abut against the connecting rod, the driving member 524 continues to move closer to the filter cylinder 2, driving the connecting rod 522 to rotate closer to the filter cylinder 2, causing the connecting rod 523 to drive the pressure rod 51 to slide downward along the slide rail 541. Preferably, when the driving member 524 moves to abut against the connecting rod, the sliding sleeve 542 is spaced apart from the end of the connecting rod 523 away from the filter cylinder 2. When the power source 53 drives the driving member 524 to move away from the filter cylinder 2, the elastic member 525 drives the connecting rod 522 to rotate away from the filter cylinder 2, raising the pressure rod 51 to a certain height. Then, the driving member 524 continues to move away from the filter cylinder 2, and after the pressure rod 51 is completely pulled out from the side of the filter cloth 71, the elastic member 525 drives the connecting rod 522 to continue rotating, moving the pressure rod 51 to the second position.

[0126] In this embodiment, "raising the pressure bar 51 to a certain height" specifically means raising the pressure bar 51 until the top of the pressure bar 51 abuts against the bottom of the fabric spreading device 1.

[0127] Preferably, in this embodiment, the connecting rod 523 is positioned above the support frame 521. When the driving member 524 is in its initial position, the connecting rod 522 extends obliquely upwards towards the filter cylinder 2, while the spring-loaded telescopic rod extends obliquely upwards away from the filter cylinder 2. This further improves the smoothness of the driving member 524 driving the connecting rod 522 to rotate towards the side closer to the filter cylinder 2.

[0128] like Figure 4 As shown, in this embodiment, the cloth pressing assembly is disposed on the side of the filter cylinder 2.

[0129] In this embodiment, when the pressure rod 51 is in the second position, the end of the pressure rod 51 near the filter cylinder 2 is located outside the top outer edge of the filter cylinder 2, and the height of the pressure rod 51 is higher than the height of the filter cloth 71 above the first side of the filter cylinder 2.

[0130] In this embodiment, the filter cylinder 2 includes a third side and a fourth side that are perpendicular to the first side and the second side. The cloth pressing assembly is disposed outside the third side and / or the fourth side, and the extension direction of the pressing rod 51 is perpendicular to the third side and the fourth side.

[0131] Preferably, two pressing components are provided, respectively located on the third and fourth sides, to press the filter cloth 71 tightly from both sides.

[0132] Example 2

[0133] The existing pressing assembly, specifically the first pressing assembly 5, uses a horizontally extending pressing rod 51 to press the filter cloth 71 into the filter cylinder 2. However, the pressing rod 51 of the existing first pressing assembly 5 is usually cylindrical, and the contact area between the pressing rod 51 and the filter cloth 71 is small, resulting in poor fixing effect on the filter cloth 71. During the forward feeding process of the sludge spreading device, the end of the filter cloth 71 is prone to loosening, resulting in poor laying effect of the filter cloth 71.

[0134] like Figures 1 to 10 As shown, in this embodiment, based on the first embodiment, the structure of the first pressing cloth assembly is further defined to solve the above-mentioned problems and avoid the situation where the end of the filter cloth 71 becomes loose.

[0135] Specifically, such as Figures 4 to 10 As shown, the pressing assembly includes a pressing rod 51 for pressing the filter cloth 71. The length direction of the pressing rod 51 is angled to the laying direction of the filter cloth 71, where the "laying direction of the filter cloth 71" refers to the "length direction of the filter cloth 71". At least the part of the pressing rod 51 extending horizontally is set as a plane parallel to the top of the filter cylinder 2 for contacting the filter cloth 71.

[0136] In some specific embodiments, the pressure rod 51 extends horizontally along the length direction perpendicular to the filter cloth 71, and the vertical section of the pressure rod 51 at the point of contact with the filter cloth 71 is a straight line parallel to the top of the filter cylinder 2 and extending along the length direction of the filter cloth 71.

[0137] In the above solution, by setting the part of the pressure rod 51 that abuts against the filter cloth 71 to be a plane parallel to the top of the filter cylinder 2, when the pressure rod 51 presses the filter cloth 71 against the top of the filter cylinder 2, the filter cloth 71 is clamped and fixed by the plane at the bottom of the pressure rod 51 and the plane at the top of the filter cylinder 2. Compared with the cylindrical pressure rod 51 in the prior art, the pressure rod 51 in this embodiment can achieve a better pressing effect and avoid the situation where the end of the filter cloth 71 is loose.

[0138] In this embodiment, the side of the vertical cross-section of the pressure rod 51 that abuts against the filter cloth 71 away from the filter cloth 71 can be a straight line, a curve, or a broken line.

[0139] In some preferred embodiments, the vertical cross-section of the pressure bar 51 at the point where it abuts against the filter cloth 71 is set to a rectangle, an arc shape, or a trapezoid.

[0140] In some preferred embodiments, the vertical section of the pressure bar 51 at the point of contact with the filter cloth 71 has a width in the vertical direction that is less than or equal to its width in the horizontal direction.

[0141] Preferably, the vertical section of the pressure rod 51 at the point where it abuts against the filter cloth 71 has a width in the vertical direction that is smaller than its width in the horizontal direction. That is, the part of the pressure rod 51 at the point where it abuts against the filter cloth 71 is set to be flat. Thus, during the process of pushing and spreading the material, on the one hand, the pressure rod 51 can have a better fixing effect on the filter cloth 71, and on the other hand, the filter cloth 71 under the spreading body 11 of the pushing and spreading device 1 can be closer to the filter cylinder 2. After the material is sprayed onto the filter cloth 71, it can be supported by the filter cylinder 2, reducing the flow of material on the filter cloth 71 and improving the uniformity of the material.

[0142] In some possible embodiments, anti-slip textures are provided on the plane of the pressure bar 51 where it abuts against the filter cloth 71, and / or, anti-slip textures are provided on the top of the filter cylinder 2 corresponding to the pressure bar 51. This prevents relative sliding between the filter cloth 71 and the filter cylinder 2 and the pressure bar 51 during the cloth spreading process, further improving the fixation effect on the filter cloth 71.

[0143] In this embodiment, the anti-slip texture can be of any shape.

[0144] Preferably, in this embodiment, the horizontally extending pressure bar 51 is configured as a long straight bar, and the vertical cross-section of the pressure bar 51 is the same everywhere.

[0145] In this embodiment, the pressure rod 51 includes a first position that presses the filter cloth 71 against the top of the filter cylinder 2, and a second position where the projection of the pressure rod 51 in the horizontal direction falls outside the filter cloth 71; a drive transmission device 52 for moving the pressure rod 51 between the first position and the second position is sleeved with the pressure rod 51.

[0146] By setting the drive transmission device 52 and the pressure rod 51 to be sleeved together, the force applied by the drive transmission device 52 to the pressure rod 51 can be applied to a section of the pressure rod 51 instead of a point on the pressure rod 51. This allows the pressure rod 51 to move and press down as a whole, avoiding the situation where the end of the pressure rod 51 away from the drive transmission device 52 tends to lift up when pressing the filter cloth 71, thus improving the pressing effect on the filter cloth 71.

[0147] In this embodiment, the drive transmission device 52 can be any kind of drive transmission device in the prior art, and the drive transmission device 52 can also be any kind of one of the above embodiments, including a connecting rod 523, which is sleeved with the pressure rod 51.

[0148] Specifically, the length of the pressure rod 51 is greater than the length of the connecting rod 523. The connecting rod 523 can be sleeved on the pressure rod 51, or the pressure rod 51 can be sleeved on the connecting rod 523, so that the two can slide relative to each other.

[0149] In some possible embodiments, a track extending along the length of the pressure rod 51 can be provided on the connecting rod 523, and the end of the pressure rod 51 away from the filter cylinder 2 is at least partially hollow and fitted onto the track.

[0150] In some preferred embodiments, the connecting rod 523 is configured as a cylinder, and the connecting rod 523 is sleeved in the middle of the pressure rod 51 and can slide along the length direction of the pressure rod 51.

[0151] Preferably, in this embodiment, the connecting rod 523 is always spaced apart from the upper edge of the filter cylinder 2 in the length direction of the pressure rod 51.

[0152] Preferably, in this embodiment, when the pressure rod 51 moves to the first position, the connecting rod 523 and the upper edge of the filter cylinder 2 are close to each other, which can better transmit the pressure to the pressure rod 51.

[0153] like Figure 4 , Figures 6 to 10 As shown, in some specific embodiments, the drive transmission device 52 includes a transmission mechanism and a drive component 524.

[0154] The transmission mechanism includes a connecting rod 523 and a connecting frame rod 522 hinged to the connecting rod 523. The connecting frame rod 522 includes at least two sets of rods of equal length that are spaced apart along the length of the connecting rod 523, forming a parallelogram structure. The driving member 524 is located at the end of the transmission mechanism of the parallelogram structure away from the filter cylinder 2, and moves back and forth in a direction parallel to the connecting rod 523. It is connected to the pressure rod 51 and the connecting frame rod 522 respectively, and drives the connecting frame rod 522 to rotate during the process of the pressure rod 51 sliding along the connecting rod 523.

[0155] In this embodiment, each set of connecting rods 522 includes a first rod portion and a second rod portion clamped on both sides of the connecting rod 523.

[0156] In some preferred embodiments, the driving member 524 includes a slide rail 541 and an abutment portion 5241. The slide rail 541 extends in a direction perpendicular to the top of the filter cylinder 2. A sliding sleeve 542 is provided at the end of the pressure rod 51 away from the filter cylinder 2, and the sliding sleeve 542 is sleeved on the slide rail 541. The abutment portion 5241 corresponds to the side of the connecting rod 522 away from the filter cylinder 2. During the process of the driving member 524 driving the pressure rod 51 to slide towards the filter cylinder 2, the abutment portion 5241 and the side of the connecting rod 522 away from the filter cylinder 2 slide together, driving the connecting rod 522 to rotate towards the filter cylinder 2. The connecting rod 523 drives the pressure rod 51 to slide along the slide rail 541.

[0157] In some preferred embodiments, at least one connecting rod 522 is provided with an elastic element 525 for driving the connecting rod 522 to rotate away from the filter cylinder 2 between it and the support frame 521 of the parallelogram-shaped transmission mechanism.

[0158] During the process of the drive member 524 driving the connecting rod 522 to rotate closer to the filter cylinder 2, the elastic member 525 stores force. During the process of the drive member 524 moving away from the filter cylinder 2, the elastic force of the elastic member 525 is released, causing the connecting rod 522 to reset. During this process, the connecting rod 523 drives the pressure rod 51 to move upward.

[0159] Preferably, in this embodiment, during the process of the driving member 524 driving the pressure rod 51 to slide towards the filter cylinder 2, there are a first working state and a second working state. Specifically, in the first working state of the driving member 524, the abutting part 5241 is spaced apart from the connecting rod 522; in the second working state of the driving member 524, the abutting part 5241 slides with the connecting rod 522, driving the connecting rod 522 to rotate towards the filter cloth 71.

[0160] During the process of the drive member 524 moving towards the filter cylinder 2, in the first working state, the drive member 524 only drives the pressure rod 51 to move towards the filter cylinder 2. During the process of the drive member 524 moving towards the filter cylinder 2, in the second working state, the drive member 524 not only drives the pressure rod 51 to move towards the filter cylinder 2, but also drives the connecting rod 522 to rotate towards the filter cylinder 2. The connecting rod 523 drives the pressure rod 51 to press down. During this process, the elastic member 525 stores force.

[0161] Preferably, in this embodiment, when the driving member 524 is in the first working state, the horizontal distance between the sliding sleeve 542 and the end of the connecting rod 523 away from the filter cylinder 2 is greater than or equal to the horizontal distance between the abutment portion 5241 and the connecting rod 522. Therefore, as the driving member 524 moves towards the filter cylinder 2, the abutment portion 5241 can smoothly abut against the connecting rod 522, driving the connecting rod 522 to rotate via the abutment portion 5241, rather than pushing the connecting rod 523 to rotate via the sliding sleeve 542 on the pressure rod 51. This ensures the smooth sliding of the pressure rod 51 along the slide rail 541.

[0162] Preferably, in this embodiment, when the driving member 524 is in the first working state, the connecting rod 522 extends obliquely upwards towards the filter cylinder 2; along the length direction of the connecting rod 523, the slide rail 541 and the abutment portion 5241 are offset, with the slide rail 541 located at the end of the driving member 524 near the filter cylinder 2 and the abutment portion 5241 located at the end of the driving member 524 away from the filter cylinder 2. Thus, before the abutment portion 5241 abuts against the connecting rod 522, i.e., when the driving member 524 is in the first working state, the pressure rod 51 can obtain a larger feed distance towards the side closer to the filter cylinder 2, and then press down under the drive of the parallelogram-structured transmission mechanism.

[0163] Preferably, in this embodiment, when the pressure rod 51 is in the first position, the angle between the connecting rod 522 and the horizontal direction is less than or equal to 45°, thereby enabling the parallelogram-shaped transmission mechanism to convert more of the pushing force of the driving member 524 on the connecting rod 522 into downward pressure on the pressure rod 51, thus improving the pressing effect on the filter cloth 71.

[0164] In this embodiment, the connecting rod 523 is positioned above the support frame 521. The support frame 521 has a support frame 5211 that protrudes towards the connecting rod 523 and extends in a direction parallel to the connecting rod 523. The vertical distance between the end of the pressure rod 51 near the filter cylinder 2 and the top of the filter cylinder 2 is less than or equal to the vertical distance between the end of the pressure rod 51 away from the filter cylinder 2 and the top of the support frame 5211. This ensures that the connecting rod 523 can drive the pressure rod 51 to press the filter cloth 71 on the filter cylinder 2 firmly.

[0165] Preferably, in this embodiment, the vertical distance between the end of the pressure rod 51 near the filter cylinder 2 and the top of the filter cylinder 2 is equal to the vertical distance between the end of the pressure rod 51 away from the filter cylinder 2 and the top of the support frame 5211.

[0166] Preferably, when the pressure rod 51 presses the filter cloth 71 against the top of the filter cylinder 2, the end of the pressure rod 51 away from the filter cylinder 2 abuts against the top of the support frame 5211, thereby further improving the horizontality of the pressure rod 51 and improving the pressing effect on the filter cloth 71.

[0167] In this embodiment, when the pressure rod 51 is in the first position, the connecting rod 523 and the support frame 5211 are misaligned with each other in the length direction of the pressure rod 51 to avoid mutual interference.

[0168] In some preferred embodiments, the drive member 524 is disposed on the support frame 5211 and is slidable along the top of the support frame 5211, and the support frame 5211 supports and guides the drive member 524.

[0169] Example 3

[0170] like Figures 4 to 10 As shown in this embodiment, a pressing assembly is introduced to prevent the pressing rod 51 from shifting under the force of the filter cloth 71, thereby improving the stability of the pressing assembly.

[0171] In this embodiment, based on Embodiment 1 or Embodiment 2, the structure of the first pressing fabric assembly is further defined.

[0172] Specifically, such as Figures 4 to 10 As shown, the pressing assembly includes a pressing rod 51 for pressing the filter cloth 71, the length direction of the pressing rod 51 being angled to the laying direction of the filter cloth 71. It also includes a limiting member 55, which is at least located on the side of the pressing rod 51 facing the laying direction of the filter cloth 71, and the limiting member 55 is in contact with the pressing rod 51.

[0173] In this embodiment, the filter cloth 71 is laid in the length direction of the filter cloth 71, which is the direction extending from the first side to the second side of the filter cylinder 2. The pressure rod 51 extends horizontally, and preferably, the length direction of the pressure rod 51 is perpendicular to the laying direction of the filter cloth 71. The limiting member 55 is at least disposed on the side of the pressure rod 51 facing the laying direction of the filter cloth 71, that is, along the laying direction of the filter cloth 71, the limiting member 55 is at least disposed downstream of the pressure rod 51, that is, the limiting member 55 is at least disposed on the side of the pressure rod 51 near the second side of the filter cylinder 2.

[0174] like Figure 4As shown, in some preferred embodiments, the limiting member 55 includes a first limiting member 551 and a second limiting member 552. The first limiting member 551 is disposed on the side of the pressure rod 51 facing the laying direction of the filter cloth 71, that is, on the side of the pressure rod 51 away from the fabric spreading device 1, and is in contact with the side of the pressure rod 51 facing the laying direction of the filter cloth 71. The second limiting member 552 is disposed on the side of the pressure rod 51 opposite to the laying direction of the filter cloth 71, that is, on the side of the pressure rod 51 close to the fabric spreading device 1, and is in contact with the side of the pressure rod 51 facing the opposite direction of the laying direction of the filter cloth 71. The pressure rod 51 is disposed between the first limiting member 551 and the second limiting member 552, and the pressure rod 51 passes through the gap between the first limiting member 551 and the second limiting member 552 to press the filter cloth 71.

[0175] In this embodiment, through the above-mentioned arrangement, the first limiting member 551 and the second limiting member 552 can be used to limit the pressure rod 51 in the horizontal direction. When the pressure rod 51 tends to deflect in the horizontal direction due to the tension in the horizontal direction, the first limiting member 551 and the second limiting member 552 respectively stop the pressure rod 51 from both sides to prevent it from rotating.

[0176] Preferably, the side of the limiting member 55 facing the pressure rod 51 is configured as a plane perpendicular to the laying direction of the filter cloth 71.

[0177] In some specific embodiments, the limiting member 55 includes a first plate 55-1 and a second plate 55-2. The first plate 55-1 is perpendicular to the laying direction of the filter cloth 71. The side of the first plate 55-1 facing the pressure rod 51 is attached to the pressure rod 51. The second plate 55-2 is disposed at either end of the first plate 55-1 or at both ends of the first plate 55-1 and extends in a direction away from the pressure rod 51. A reinforcing rib 55-3 is provided between the first plate 55-1 and the second plate 55-2, thereby improving the support strength of the limiting member 55 and further improving the stability of limiting the pressure rod 51.

[0178] like Figures 4 to 10 As shown, in some specific embodiments, the first plates 55-1 of the first limiting member 551 and the second limiting member 552 extend vertically, the first plates 55-1 of the first limiting member 551 and the second limiting member 552 are arranged opposite to each other and spaced apart, the space between the first plates 55-1 of the first limiting member 551 and the second limiting member 552 is used for the passage of the pressure rod 51, and the second plates 55-2 of the first limiting member 551 and the second limiting member 552 extend horizontally from the bottom of the first plates 55-1 of the second limiting member 551 in a direction away from each other.

[0179] The reinforcing rib 55-3 is perpendicular to the first plate 55-1 and the second plate 55-2, extending vertically upward from the top of the second plate 55-2. The side of the reinforcing rib 55-3 closest to the first plate 55-1 is connected to the first plate 55-1. Preferably, the side of the reinforcing rib 55-3 away from the first plate 55-1 is inclined from bottom to top towards the first plate 55-1.

[0180] Preferably, in this embodiment, the first plate 55-1, the second plate 55-2, and the reinforcing rib 55-3 are a single piece.

[0181] Preferably, in this embodiment, the side wall of the pressure rod 51 near the limiting member 55 is configured as a plane that fits against the limiting member 55. Specifically, in this embodiment, the pressure rod 51 fits against the first plate 55-1 of the first limiting member 551 and the second limiting member 552 through the plane, which can further improve the limiting effect of the limiting member 55 on the pressure rod 51.

[0182] In this embodiment, the pressure rod 51 presses the filter cloth 71 tightly onto the filter cylinder 2, and the limiting member 55 is disposed near the edge of the filter cylinder 2. Preferably, the side of the limiting member 55 near the filter cylinder 2 is in contact with the outer edge of the top of the filter cylinder 2.

[0183] In some specific embodiments, during the movement of the pressure rod 51 between the first position and the second position, the pressure rod 51 always remains at least partially in contact with the limiting member 55. Specifically, the first plate 55-1 of the first limiting member 551 and the second limiting member 552 extends vertically upward, above the filter cylinder 2 by a certain height. This certain height ensures that when the pressure rod 51 is in the second position, the first plate 55-1 at least partially overlaps with the pressure rod 51 in the vertical direction. When the pressure rod 51 is in the second position, the first plate 55-1 of the first limiting member 551 and the second limiting member 552 at least partially overlap in the length direction of the pressure rod 51.

[0184] Preferably, when the pressure rod 51 is in the second position, the end of the pressure rod 51 near the filter cylinder 2 is flush with the outer edge of the top of the filter cylinder 2. Preferably, in this embodiment, the lower end of the first plate 55-1 of the first limiting member 551 and the second limiting member 552 is lower than the upper edge of the filter cylinder 2.

[0185] In this embodiment, a drive transmission device 52 for moving the pressure rod 51 between a first position and a second position is provided on the side of the limiting member 55 away from the filter cylinder 2. The drive transmission device 52 can be any type of drive transmission device in the prior art, or it can be the drive transmission device 52 in the first embodiment described above. In some preferred embodiments, the first limiting member 551 and the second limiting member 552 are integrated with the support frame 521.

[0186] Example 4

[0187] like Figures 1 to 14 As shown, a cloth-pushing and spreading device 1 for a sludge dewatering equipment as described in Embodiment 1 is introduced.

[0188] like Figures 1 to 3 , Figures 11 to 14 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. The front end of the spreading body 11 is provided with a downwardly extending spreading head 113. The first end of the spreading head 113 is connected to the spreading body 11, and the second end of the spreading head 113, which is opposite to the first end of the spreading head 113, is lower than the spreading opening 1121 at least when the spreading head 113 abuts against the filter cloth 71.

[0189] 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.

[0190] like Figure 1 and Figure 2 As 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.

[0191] 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.

[0192] 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 material from adhering to the material spreading body 11.

[0193] 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.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] In this embodiment, the fabric pusher 113 can be configured as a solid structure or a hollow structure.

[0198] 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.

[0199] 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.

[0200] 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.

[0201] 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.

[0202] 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.

[0203] 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.

[0204] Preferably, in this embodiment, the two support plates are tangent to the upper and lower sides of the solid column 1134, respectively.

[0205] Preferably, in this embodiment, a reinforcing plate 1133 is provided between the two support plates to reinforce the structure of the pusher head 113.

[0206] like Figure 12 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.

[0207] 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.

[0208] 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] like Figure 13 and Figure 14 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.

[0214] 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.

[0215] 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.

[0216] In this embodiment, the fabric pusher 113 can be driven by a separate small motor.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] In some possible embodiments, the limiting structure may be disposed between the rotating shaft and the bushing on the pusher head 113.

[0222] like Figure 13 and Figure 14As 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.

[0223] 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.

[0224] In this embodiment, the elastic element used to drive the pusher head 113 to rotate to the first position can be a torsion spring.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] 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.

[0229] 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.

[0230] 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.

[0231] 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.

[0232] Preferably, in this embodiment, the material body 11 extends in the horizontal direction.

[0233] 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.

[0234] Specifically, the notch extends through the pusher head 113 in a vertical direction perpendicular to the first end to the second end, with the opening of the notch facing 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; the working end of the second pressing assembly passes through the notch from top to bottom, pressing the filter cloth 71 covered on the second end of the pusher head 113 onto the filter cylinder 2.

[0235] 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.

[0236] 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.

[0237] In this embodiment, a material spreading pipe 112 is provided inside the shell 111 of the material spreading body 11. The material spreading pipe 112 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 1121. The second end of the variable diameter section is connected to the first end of the output section, so that the channel of the variable diameter section is connected to the channel of the output section.

[0238] The output section has the same cross-section perpendicular to the material's forward direction, and the bottom surface of the output section carrying the material is a plane; the cross-sectional area of ​​the variable diameter section at the second end is less than or equal to the cross-sectional area at the first end, and the vertical cross-section of the output section is the same as the vertical cross-section of the variable diameter section at the second end.

[0239] Specifically, 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.

[0240] This device can more evenly spread water-containing materials (such as sludge) on the filter cloth.

[0241] 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 pressing assembly for a dewatering device, characterized in that, include: The pressure bar (51) used to press the filter cloth (71) against the top of the filter cylinder (2) has a horizontally extending pressure bar (51) with at least the part that abuts against the filter cloth (71) set as a plane parallel to the top of the filter cylinder (2). Drive transmission device (52), including: The transmission mechanism includes a connecting rod (523) and a connecting frame rod (522) hinged to the connecting rod (523). The connecting frame rod (522) includes at least two sets of rods of equal length that are spaced apart along the length direction of the connecting rod (523) to form a parallelogram structure. The connecting rod (523) is sleeved on the pressure rod (51), or the pressure rod (51) is sleeved on the connecting rod (523). The connecting rod (523) is slidable along the length direction of the pressure rod (51), and the length of the connecting rod (523) is less than the length of the pressure rod (51). The driving component (524) is located at one end of the transmission mechanism of the parallelogram structure. It moves back and forth in a direction parallel to the connecting rod (523) and is connected to the pressure rod (51) and the connecting rod (522) respectively. During the process of the pressure rod (51) sliding along the connecting rod (523), it drives the connecting rod (522) to rotate. At least one connecting rod (522) is provided with an elastic element (525) between it and the support frame (521) of the parallelogram structure transmission mechanism for driving the connecting rod (522) to rotate toward the first end of the pressure rod (51).

2. The cloth pressing assembly for a dewatering device according to claim 1, characterized in that, The pressure bar (51) extends horizontally along the length direction perpendicular to the filter cloth (71); the vertical cross section of the pressure bar (51) for contacting the filter cloth (71) is set as rectangular, arc-shaped or trapezoidal.

3. The cloth pressing assembly for a dewatering device according to claim 2, characterized in that, The vertical section of the pressure bar (51) used to abut against the filter cloth (71) has a width in the vertical direction that is less than or equal to the width in the horizontal direction.

4. The cloth pressing assembly for a dewatering device according to claim 3, characterized in that, The pressure bar has anti-slip textures on the flat surface where it contacts the filter cloth.

5. The cloth pressing assembly for a dewatering device according to claim 3, characterized in that, Anti-slip textures are provided on the top of the filter cylinder corresponding to the pressure rod.

6. The cloth pressing assembly for a dewatering device according to any one of claims 1 to 5, characterized in that, When the pressure bar (51) is in the first position, it presses the filter cloth (71) against the top of the filter cylinder (2). When the pressure bar (51) is in the second position, the projection of the pressure bar (51) in the horizontal direction falls outside the filter cloth (71). The drive transmission device (52) is used to move the pressure rod (51) between the first position and the second position.

7. The cloth pressing assembly for a dewatering device according to claim 6, characterized in that, The connecting rod is cylindrical and is sleeved in the middle of the pressure rod, and can slide along the length of the pressure rod.

8. The cloth pressing assembly for a dewatering device according to claim 6, characterized in that, The drive unit (524) includes: The slide rail (541) extends in a direction perpendicular to the pressure rod (51), and the first end of the pressure rod (51) is provided with a sliding sleeve (542), which is sleeved on the slide rail (541). The abutting part (5241) corresponds to the side of the second end of the connecting rod (522) away from the pressure rod (51); During the process of the driving member (524) driving the pressure rod (51) to slide towards the second end of the pressure rod (51), the abutment part (5241) and the connecting rod (522) slidingly engage on the side away from the second end of the pressure rod (51), driving the connecting rod (522) to rotate towards the second end of the pressure rod (51), and driving the pressure rod (51) to slide along the slide rail (541) through the connecting rod (523).

9. The cloth pressing assembly for a dewatering device according to claim 8, characterized in that, When the strut is in the first position, the angle between the connecting rod and the horizontal direction is less than or equal to 45°.

10. The cloth pressing assembly for a dewatering device according to claim 8, characterized in that, The driving component (524) is located on the side of the parallelogram-shaped transmission mechanism away from the second end of the pressure rod (51); during the process of the driving component (524) driving the pressure rod (51) to slide towards the second end of the pressure rod (51): In the first working state, the contact part (5241) is spaced apart from the connecting rod (522); In the second working state, the abutment part (5241) slides with the side of the connecting rod (522) away from the second end of the pressure rod (51), causing the connecting rod (522) to rotate toward the second end of the pressure rod (51).

11. The cloth pressing assembly for a dewatering device according to claim 10, characterized in that, When the drive unit (524) is in the first working state, the horizontal distance between the sliding sleeve (542) and the connecting rod (523) is greater than or equal to the horizontal distance between the abutment part (5241) and the connecting rod (522); Along the length of the connecting rod (523), the slide rail (541) and the abutment part (5241) are offset. The slide rail (541) is located at the end of the driving member (524) near the pressure rod (51), and the abutment part (5241) is located at the end of the driving member (524) away from the pressure rod (51).

12. The cloth pressing assembly for a dewatering device according to claim 11, characterized in that, When the drive unit is in the first working state, the connecting rod extends obliquely upwards toward the second end of the pressure rod.

13. The cloth pressing assembly for a dewatering device according to claim 8, characterized in that, The connecting rod (523) is positioned above the support frame (521), and the support frame (521) is provided with a support frame (5211) that protrudes towards the connecting rod (523) and extends in a direction parallel to the connecting rod (523); the vertical distance between the second end of the pressure rod (51) and the top of the filter cylinder (2) is less than or equal to the vertical distance between the first end of the pressure rod (51) and the top of the support frame (5211).

14. The cloth pressing assembly for a dewatering device according to claim 13, characterized in that, The drive unit (524) is slidably mounted on the support frame (5211).

15. A dehydration device, characterized in that, The filter cylinder (2) includes a filter cylinder (2), the top of which is provided with a cloth pushing and laying device (1) for laying the filter cloth (71) in layers and spraying material onto the filter cloth (71). The filter cylinder (2) is equipped with a cloth pressing assembly for dewatering equipment as described in any one of claims 1 to 14 on the side near the cloth pushing and laying device (1).

16. The dehydration equipment according to claim 15, characterized in that, The fabric pushing and spreading device (1) is provided with a downwardly inclined and rotatable fabric pushing head (113) at the front end along the feeding direction. The first end of the fabric pushing head (113) is connected to the front end of the fabric pushing and spreading device (1) along the feeding direction. Before the feeding of the cloth spreading device (1), the pressure rod (51) of the cloth pressing assembly presses the filter cloth (71) onto the filter cylinder (2); During the feeding process of the cloth pushing and spreading device (1), the cloth pushing head (113) abuts against the filter cloth (71), the second end of the cloth pushing head (113) opposite to the first end rotates downward, and the distance between the bottom of the second end of the cloth pushing head (113) and the top of the filter cylinder (2) is greater than the distance between the top of the pressure rod (51) and the top of the filter cylinder (2).

Images