A kind of equipment for dehydrating water-containing materials by stacking filter pressing

Abstract

The present invention provides a cumulative filter pressing and dehydration device for water-containing materials, comprising: a filter cylinder, in which several layers of materials to be processed wrapped by filter cloth are laid up and down in the filter cylinder; an extrusion device, which is arranged above the filter cylinder and comprises an extrusion plate for extruding the materials in the filter cylinder; the extrusion plate comprises a main body, and a protrusion protruding downward is arranged on the bottom surface of the main body, and the cross section of the protrusion gradually decreases from top to bottom. Through the above arrangement, the middle part of the bottom surface of the extrusion plate protrudes downward, so that the extrusion force of the middle part of the bottom surface of the extrusion plate on the material is greater than the extrusion force on the material near the edge, so that the water in the material has a flow trend from the middle part of the filter cylinder to the edge of the filter cylinder, thereby improving the dehydration effect on the material; at the same time, it can also prevent the edge of the filter cloth from being stuck between the movable bottom plate and the inner peripheral wall of the cylinder body, and in the water outlet hole on the inner peripheral wall of the cylinder body, so that the cloth rolling and unloading process can be carried out smoothly, and the filter cloth can be prevented from being torn, thereby improving the service life of the filter cloth.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment, and in particular relates to a stacked filter-pressing dehydration device for water-containing materials. Background Art

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

[0003] There are many methods for solid-liquid separation, including pressing, extrusion, centrifugation, etc., and the corresponding solid-liquid separation equipment is also diverse. Among them, the stacking extrusion device has the characteristics of high extrusion pressure, high extrusion limit, and long extrusion time, and has a good dehydration effect, so it is widely used. The filter cloth of the stacking extrusion device is generally an ultra-long continuous filter cloth. During the operation, the filter cloth needs to be stacked and laid in the filter cylinder and the material is sprayed on the filter cloth, and then the extrusion equipment is used to squeeze downward from the top opening of the filter cylinder, so that the water in the material passes through the filter cloth and is discharged from the water outlet on the inner wall of the filter cylinder. For example, the uniform spray stacking extrusion device involved in the Chinese invention patent with application number CN202210362474.5. The extrusion equipment includes a hydraulic device and an extrusion plate, which are arranged above the cylinder body at the working position B. The hydraulic device has a telescopic rod that can be extended and retracted up and down, and the bottom end of the telescopic rod is connected to the extrusion plate. The area of ​​the extrusion plate matches the cross-section of the inner cavity of the cylinder body. The size of the extrusion plate is slightly smaller than the cross-section of the inner cavity of the cylinder body. The extrusion plate can be extruded downward from the top opening of the cylinder body.

[0004] However, the bottom surface of the extrusion plate of the existing extrusion equipment is usually a horizontally extending plane. During the extrusion process, vertical pressure is uniformly applied to the material at various locations along the horizontal direction. Since the water in the material needs to be discharged through the water outlet holes on the inner wall of the filter cylinder, the existing extrusion equipment may easily cause the water in the material located in the central area of ​​the filter cylinder to be unable to be completely discharged during the process of feeding, extruding and dehydrating the material.

[0005] Therefore, designing a stacked filter press dehydration device for water-containing materials that can improve the dehydration effect of the materials has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0006] The present invention provides a device for stacking and pressing filters to dehydrate water-containing materials. One purpose of the present invention is to solve the problem of poor dehydration effect on materials located in the center area of ​​a filter cylinder in the prior art.

[0007] Another object of the present invention is to solve the problem that when the existing cloth pushing and spreading device is spreading the filter cloth and the sludge simultaneously, the spreading effect of the filter cloth and the sludge is easily affected due to the adhesion of the sludge to the filter cloth and the cloth pushing and spreading device.

[0008] Another object of the present invention is to solve the problem that in the process of pushing and spreading the cloth in the existing water-containing material stacking and filtration dehydration equipment, the driving device is always kept at a large elongation length to drive the pushing and spreading device to reciprocate, resulting in poor smoothness of movement and high requirements on the driving device.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0010] A device for stacking and filtering and dehydrating water-containing materials, comprising: a filter cylinder, in which a plurality of layers of materials to be processed wrapped by filter cloth are laid up and down; an extrusion device, arranged above the filter cylinder, comprising an extrusion plate for extruding the materials in the filter cylinder; the extrusion plate comprises a main body, on the bottom surface of which a protrusion protruding downward is coaxially arranged, and the cross section of the protrusion gradually decreases from top to bottom.

[0011] Furthermore, the cross section of the main body matches the cross section of the internal space of the filter cylinder, the protrusion extends downward from the edge of the bottom surface of the main body, or the protrusion extends downward from the middle of the bottom surface of the main body, near the edge, and the projection of the protrusion on the horizontal plane falls within the projection of the main body on the horizontal plane.

[0012] Furthermore, the cross section of the outer peripheral wall of the protrusion in the vertical direction is a straight line, or a smooth curve, or a part is a straight line and the other part is a smooth curve.

[0013] Furthermore, the surface roughness of at least a portion of the outer peripheral wall of the protrusion is set to Ra3.2 microns to Ra25 microns.

[0014] Furthermore, a chamfer is provided between the bottom surface of the main body and the side wall of the main body.

[0015] Furthermore, a frame is provided on one side of the filter cylinder, and a cloth pushing and spreading device is installed on the frame. The cloth pushing and spreading device reciprocates above the filter cylinder in a horizontal direction to lay the filter cloth in layers in the filter cylinder and spray material onto the filter cloth; a cloth pushing head which can rotate up and down is provided at the front end of the cloth pushing and spreading device along the feeding direction. When the cloth pushing head rotates downward to the lower limit position, the height difference between the front end of the cloth pushing head along the feeding direction of the cloth pushing and spreading device and the spreading port of the cloth pushing and spreading device is greater than the thickness of the material laid on the filter cloth.

[0016] Furthermore, a cloth guide roller is provided on the frame above the cloth pushing and spreading device, and the filter cloth extends from above the cloth pushing and spreading device, bypassing the cloth guide roller to the front side of the cloth pushing and spreading device along the feeding direction; a first cloth pressing assembly is provided on the first side edge of the top of the filter cylinder close to the frame, and the first cloth pressing assembly is used to press the filter cloth against the first side edge; during the feeding process of the cloth pushing and spreading device, the cloth pushing head abuts against the filter cloth, and the cloth pushing head rotates downward to the lower limit position; a second cloth pressing assembly is provided on the second side edge of the top of the filter cylinder away from the frame, and when the cloth pushing head moves to above the second side edge of the filter cylinder, the second cloth pressing assembly is used to press the filter cloth against the second side edge.

[0017] Furthermore, the cloth pushing and spreading device includes a base slidably mounted on a frame, and a spreading body slidably mounted on the base. The frame is provided with a front drive device for driving the cloth pushing and spreading device to feed / retract as a whole, and the base is provided with a drive device for driving the spreading body to feed / retract relative to the base.

[0018] Furthermore, the material laying body includes a shell, and a material laying pipe installed in the shell, the material laying pipe includes a plurality of pipes arranged in a horizontal direction perpendicular to the feeding direction of the material laying body, the material laying pipe is connected to a silo for containing materials through a material delivery pipe; the material laying pipe includes an input section, a reducing section and an output section each having a channel, the first end of the reducing section is connected to the input section, and the second end of the reducing section is connected to the output section; the width of the channel of the reducing section gradually increases and the height of the channel gradually decreases from the first end to the second end; the material laying port is arranged at an end of the output section away from the reducing section, the material laying port is bent and extended downward, and is connected to the outside of the shell from the bottom of the shell.

[0019] Furthermore, a water collecting drain with an open top is arranged on the frame above the cloth pushing and spreading device, and at least part of the filter cloth is arranged above the water collecting drain and corresponds to the water collecting drain in the vertical direction; a cleaner is arranged on the upper and lower sides of the filter cloth corresponding to the water collecting drain in the vertical direction; the cleaner includes a flushing back plate arranged on the lower side of the filter cloth and a flushing component arranged on the upper side of the filter cloth, and there is an angle between the flushing back plate and the corresponding filter cloth.

[0020] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0021] 1. The present invention provides a protruding portion so that the middle part of the bottom surface of the extrusion plate protrudes downward. When the material is extruded, the middle part of the bottom surface of the extrusion plate contacts the material first, so that the extrusion force of the middle part of the bottom surface of the extrusion plate on the material is greater than the extrusion force of the bottom surface of the extrusion plate on the material near the edge, so that the water in the material has a flow trend from the middle part of the filter cylinder to the edge of the filter cylinder, and the water in the material flows out smoothly from the water outlet holes in the inner layer of the peripheral wall of the cylinder body; at the same time, it can also prevent the edge of the filter cloth from being stuck between the movable bottom plate of the filter cylinder and the inner peripheral wall of the cylinder body of the filter cylinder, and in the water outlet holes on the peripheral wall of the cylinder body, so that the cloth rolling and unloading process can be carried out smoothly, and the filter cloth can be prevented from being torn, thereby increasing the service life of the filter cloth.

[0022] 2. The present invention provides a cloth pushing head to leave space for laying materials between the filter cloth below the paving body and the paving opening, thereby preventing the materials from sticking to the paving body and improving the paving effect of the materials. Thus, the materials can be evenly spread between two adjacent layers of filter cloth, which is beneficial to improving the dehydration effect of the materials.

[0023] 3. The present invention provides a cloth-pushing and spreading device including a spreading body and a base. Before the cloth-pushing and spreading is performed, the base can be driven to carry the spreading body and move along the first guide assembly to approach the filter cylinder. During the cloth-pushing and spreading process, the driving device only needs to drive the spreading body to reciprocate above the filter cylinder. The elongated length of the driving device is maintained in a relatively small range, which is beneficial to ensure the smoothness of the reciprocating motion of the spreading body and can improve the efficiency and control accuracy of the cloth-pushing and spreading. At the same time, the driving device with a small stroke can realize the driving of the spreading body, which is beneficial to reduce the cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0025] Figure 1 It is a schematic structural diagram of a stacked filter press dehydration device for water-containing materials in an embodiment of the present invention;

[0026] Figure 2 It is a cross-sectional schematic diagram of a stacked filter press dehydration device for water-containing materials in an embodiment of the present invention;

[0027] Figure 3 For the embodiment of the present invention Figure 2 The enlarged view of point B in the middle;

[0028] Figure 4For the embodiment of the present invention Figure 2 Enlarged view of point C in the middle;

[0029] Figure 5 It is a structural schematic diagram of the cloth pushing and spreading device in the embodiment of the present invention when it moves to the second side of the filter cylinder;

[0030] Figure 6 Schematic diagram of the installation structure of the cloth pressing assembly in an embodiment of the present invention;

[0031] Figure 7 It is a structural schematic diagram of the first cloth pressing assembly when the pressing rod is in the second position in an embodiment of the present invention;

[0032] Figure 8 It is a structural schematic diagram of the first cloth pressing assembly when the driving member is switched to the second working state in an embodiment of the present invention;

[0033] Fig. 9 It is a structural schematic diagram of the first cloth pressing assembly when the pressing rod is in the first position in an embodiment of the present invention;

[0034] Fig.10 It is a structural schematic diagram of the first cloth pressing assembly in the embodiment of the present invention when it is in the middle position during the retreat process;

[0035] Fig.11 It is a structural schematic diagram of the movable part when it rotates to the second position in the embodiment of the present invention;

[0036] Fig.12 It is a structural schematic diagram of the movable part when it rotates to the first position in the embodiment of the present invention;

[0037] Fig.13 It is a cross-sectional schematic diagram of the paving body in the embodiment of the present invention;

[0038] Fig.14 For the embodiment of the present invention Fig.13 The enlarged view of point A in the middle;

[0039] Fig.15 It is a structural schematic diagram of the cloth pushing head in the first position according to the embodiment of the present invention;

[0040] Fig.16 It is a structural schematic diagram of the cloth pushing head in the second position according to the embodiment of the present invention;

[0041] Fig.17 This is a schematic diagram of the structure of a material laying pipe in an embodiment of the present invention;

[0042] Fig.18 It is a schematic diagram of the cooperation structure of two groups of filter cylinders and a frame and an extrusion device in an embodiment of the present invention;

[0043] Fig.19A schematic diagram of the structure of an extrusion pressing plate in an embodiment of the present invention;

[0044] Fig. 20 Another structural schematic diagram of an extrusion pressing plate in an embodiment of the present invention;

[0045] Fig.21 Schematic diagram of another structure of the extrusion pressing plate in the embodiment of the present invention.

[0046] Description of the main components in the figure: 1. cloth-pushing and spreading device; 11. spreading body; 111. shell; 112. spreading pipe; 1121. spreading port; 1122. input section; 1123. diameter-changing section; 1124. output section; 113. cloth-pushing head; 1133. reinforcing plate; 1134. solid column; 1135. notch; 12. base; 121. second driving part; 15. feeding pipe; 2. filter cylinder; 21. cylinder body; 22. movable Bottom plate; 3, discharging collecting hopper; 4, frame; 41, cloth guide roller; 411, first cloth guide roller; 412, second cloth guide roller; 41-1, head cloth guide roller; 41-2, end cloth guide roller; 42, cleaning device; 421, flushing component; 422, flushing back plate; 43, water collecting and draining device; 5, first cloth pressing assembly; 51, pressing rod; 52, driving transmission device; 521, supporting frame; 5211, supporting frame; 522, connecting rod; 52 3. connecting rod; 524. driving member; 5241. abutting part; 525. force storage structure; 53. power source; 54. guide assembly; 541. slide rail; 542. sleeve; 55. position limiting member; 551. first position limiting member; 552. second position limiting member; 55-1. first plate; 55-2. second plate; 55-3. reinforcing rib; 6. second cloth pressing assembly; 61. fixing part; 611. first support seat; 612. second support seat Support seat; 62, movable part; 621, rotating shaft; 622, cloth pressing rod; 6221, neck; 6222, head; 623, driving rod; 7, cloth winding roller; 71, filter cloth; 8, extrusion equipment; 81, extrusion plate; 811, main body; 812, protrusion; 9, silo; 10, equipment for carrying and moving the filter cylinder; 10-1, lifter; 10-2, pressure-bearing member; 10-3, fixed guide rail; 10-4, movable guide rail. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0048] like Figures 1 to 21As shown, in the embodiment of the present invention, a water-containing material stacking filter pressing and dehydration device is introduced, including a cloth pushing and spreading device 1 and a filter cylinder 2. The cloth pushing and spreading device 1 spreads a filter cloth 71 in the filter cylinder 2 and sprays the material to be processed onto the filter cloth 71. During the spreading process, the filter cloth 71 is fixed by two sets of cloth pressing assemblies.

[0049] In some specific embodiments, the cloth pushing and spreading device 1 is configured to move the folded filter cloth 71 back and forth between the first side and the second side opposite to the filter cylinder 2, and spray the material to be processed onto the filter cloth 71. In the moving direction of the filter cloth 71, the first and second side opposite to the top of the filter cylinder 2 are provided with a first cloth pressing assembly 5 and a second cloth pressing assembly respectively.

[0050] The equipment for stacking and filtering and dehydrating water-containing materials also includes a filter cloth placing and unloading and winding device, which includes a unloading component for unloading the dry material after extrusion and dehydration from the filter cloth 71, a filter cloth finishing component for leveling and cleaning the filter cloth 71 from which the dry material has been removed, and a filter cloth unwinding and winding component for winding up the filter cloth 71 and placing the cloth.

[0051] The filter cloth reeling and unreeling assembly includes a cloth reeling roller 7, on which the filter cloth 71 is rolled up. The cloth reeling roller 7 containing the filter cloth 71 and the cloth pushing and spreading device 1 are located on the same side of the filter cylinder 2, and the spreading port of the cloth pushing and spreading device 1 is higher than the upper edge of the filter cylinder 2.

[0052] The embodiment of the present invention also provides a material laying method for a water-containing material stacking filter press dehydration device, comprising the following steps: S1: the first cloth pressing assembly 5 presses the filter cloth 71 against the first side; the movable bottom plate 22 of the filter cylinder 2 moves to be flush with the top of the filter cylinder 2, or the movable bottom plate 22 moves to be lower than the top of the filter cylinder 2, and the interval between the movable bottom plate 22 and the top of the filter cylinder 2 is less than or equal to the thickness of the material laid on the filter cloth 71; S2: the cloth pushing and laying device 1 feeds from the first side to the second side, pushes the filter cloth 71 to be laid from the first side to the second side, and sprays the material onto the filter cloth 71 ; S3: The front end of the cloth-pushing and spreading device 1 moves along the feeding direction to the top of the second side, and the second cloth-pressing assembly 6 presses the filter cloth 71 onto the second side; S4: The cloth-pushing and spreading device 1 retreats from the second side, and during or after the retreat, the first cloth-pressing assembly 5 is reset; S5: When the front end of the cloth-pushing and spreading device 1 moves along the feeding direction to the outside of the first side, the movable bottom plate 22 of the filter cylinder 2 moves downward by a stroke, so that the top layer of the filter cloth 71 wrapped with the material falls into the filter cylinder 2, and the first cloth-pressing assembly 5 moves again to press the filter cloth 71 at the first side; repeat steps S2 to S5. Thus, several layers of the material to be processed wrapped by the filter cloth 71 can be laid up and down in the filter cylinder 2. In this embodiment, in step S5, the downward stroke of the movable bottom plate 22 matches the thickness of the material laid on the filter cloth 71 and the sum of the thickness of the filter cloth 71. Specifically, there are two layers of filter cloth 71 between two adjacent layers of material.

[0053] It also includes an extrusion device 8, which is located above the filter cylinder 2 and is used to extrude the material. After the extrusion is completed, the cloth rolling and unloading process begins. The cloth rolling roller 7 in the filter cloth unloading and unloading winding device rotates under the drive of the motor, driving the filter cloth 71 to move and recover the filter cloth 71; the material after extrusion and dehydration is carried on the filter cloth 71, and leaves the filter cylinder 2 together with the filter cloth 71 and enters the filter cloth unloading and unloading winding device. After being unloaded by the unloading component, the dehydrated material falls into the discharge collection hopper 3 below, and the filter cloth 71 is cleaned and leveled by the filter cloth finishing component and then rolled up on the cloth rolling roller 7.

[0054] The material to be treated is a mixture of solid and liquid, for example, a water-containing material. There is no limit on the water content. The water-containing material stacking filter press dewatering equipment is preferably used for solid-liquid separation of sludge with high water content.

[0055] In this embodiment, in order to ensure the wrapping of the material, the width of the filter cloth 71 is set to be greater than the width of the internal space of the filter cylinder 2, and the width of the spreading opening of the cloth-pushing and spreading device 1 is less than or equal to the width of the internal space of the filter cylinder 2. After the cloth-pushing and spreading device 1 spreads the material on the filter cloth 71, the movable bottom plate of the filter cylinder 2 moves downward, and the filter cloth 71 carrying the material falls into the filter cylinder 2. The side edges of the filter cloth 71 are bent upward under the obstruction of the filter cylinder 2, and the material is wrapped from both sides of the material to prevent the material from flowing out from both sides of the filter cloth 71. In some preferred embodiments, there is a certain interval between the cloth pressing position of the first cloth pressing assembly 5 and the internal space of the filter cylinder 2, so that when the movable bottom plate of the filter cylinder 2 moves downward, the part of the filter cloth 71 that exceeds the internal space of the filter cylinder 2 is bent upward under the obstruction of the first side edge of the filter cylinder 2, so that the side of the material close to the cloth-pushing and spreading device 1 is also wrapped by the filter cloth 71.

[0056] Embodiment 1

[0057] The extrusion equipment includes an extrusion plate and a hydraulic device. The hydraulic device has a telescopic rod that can be extended up and down, and the bottom end of the telescopic rod is connected to the extrusion plate. The bottom surface of the extrusion plate in the prior art is usually a horizontally extending plane. During the extrusion process, vertical pressure is evenly applied to the material at various locations along the horizontal direction. The dehydration effect on the material in the center area of ​​the filter cylinder is poor, and it is easy to cause the edge of the filter cloth to be stuck between the movable bottom plate of the filter cylinder and the inner peripheral wall of the filter cylinder, and in the water outlet holes on the inner peripheral wall of the cylinder body, so that the cloth rolling and unloading process cannot be carried out smoothly, and it is easy to cause the filter cloth to tear. Figures 1 to 21 As shown, in an embodiment of the present invention, a water-containing material stacking filter press dehydration equipment is introduced to solve the above-mentioned problem.

[0058] The water-containing material stacking filter pressing dehydration equipment comprises a filter cylinder 2, a cloth pushing and spreading device 1, a cloth pressing assembly and a filter cloth placing and unloading and winding device, wherein the filter cloth placing and unloading and winding device and the cloth pushing and spreading device 1 are arranged on the same side of the filter cylinder 2 and supported by a frame 4. The filter cloth placing and unloading and winding device comprises a unloading assembly, a filter cloth finishing assembly and a filter cloth unwinding and winding assembly. The cloth winding roller 7 of the filter cloth unwinding and winding assembly is installed on the frame 4, and the filter cloth 71 is rolled up on the cloth winding roller 7. The filter cloth finishing assembly includes a plurality of cloth guide rollers 41 disposed between the cloth winding roller 7 and the filter cylinder 2. The cloth guide rollers 41 and the cloth winding rollers 7 are both rotatably mounted on the frame 4. The cloth guide rollers 41 are parallel to the cloth winding rollers 7, and the cloth guide rollers 41 and the cloth winding rollers 7 are aligned in the axial direction. The filter cloth 71 passes through each cloth guide roller 41 in turn, extending from the top of the cloth pushing and spreading device 1 to the front side of the cloth pushing and spreading device 1 along the feeding direction, and the cloth pressing assembly presses the filter cloth 71 against the filter cylinder 2. The cloth pushing and spreading device 1 reciprocates above the filter cylinder 2 in the horizontal direction, lays the filter cloth 71 in layers in the filter cylinder 2, and sprays and discharges materials onto the filter cloth 71.

[0059] like Figures 1 to 3 and Figures 19 to 21 As shown, the water-containing material stacking filter dehydration device also includes an extrusion device 8, which is used to extrude and dehydrate the material in the filter cylinder 2. Specifically, the cylinder body 21 of the filter cylinder 2 is a hollow cubic structure, the top of the cylinder body 21 is open, and includes a peripheral wall and a bottom wall. The peripheral wall of the cylinder body 21 is set as a double-layer structure, the inner layer and the outer layer of the peripheral wall are arranged at intervals, the tops of the inner layer and the outer layer of the peripheral wall are connected to each other, the bottoms of the inner layer and the outer layer of the peripheral wall are connected to each other, the internal space of the inner layer of the peripheral wall constitutes an inner cavity for accommodating materials, and a channel for water to flow out is formed between the inner layer and the outer layer of the peripheral wall. Water outlet holes are arranged on each side of the inner layer of the peripheral wall, and the water outlet holes on the inner layer of the peripheral wall are arranged in a horizontal direction and / or a vertical direction. The water outlet holes are distributed throughout the entire inner layer wall surface of the peripheral wall, which is used to filter out the water in the material when the extrusion plate 81 squeezes the material. A drainage interface connected to the outside is provided at the bottom of the outer layer of the peripheral wall, which is used to discharge the filtered water. The bottom wall of the cylinder body 21 can be connected to the bottom of the peripheral wall of the cylinder body 21 as a whole, or can be set as a separate structure with the peripheral wall of the cylinder body 21. The movable bottom plate 22 is arranged above the bottom wall. The movable bottom plate 22 matches the cross section of the inner cavity of the cylinder body 21 and can move up and down along the cylinder body 21. A lower opening is arranged in the middle of the bottom wall, and the lower opening is smaller than the cross section of the inner cavity of the cylinder body 21.

[0060] like Figures 19 to 21 As shown, in this embodiment, the extrusion plate 81 of the extrusion device 8 includes a main body 811 and a protrusion 812 arranged on the bottom surface of the main body 811, the protrusion 812 protrudes downward from the bottom surface of the main body 811, the protrusion 812 is coaxial with the main body 811, and the cross section of the protrusion 812 gradually decreases from top to bottom, that is, the middle part of the bottom surface of the extrusion plate 81 protrudes downward. Therefore, when the extrusion plate 81 extrudes the material in the filter cylinder 2, the middle part of the bottom surface of the extrusion plate 81 first contacts the material, exerts pressure on the material, and makes the water of the material near the center of the filter cylinder 2 flow to the surroundings, and the extrusion plate 81 continues to squeeze the material downward, so that the water of the material flows out from the water outlet hole on the inner layer of the peripheral wall of the cylinder body 21. This solution makes the squeezing method of the squeezing plate 81 on the material adapt to the structure of the filter cylinder 2, so that the water in the material has a flow tendency from the middle of the filter cylinder 2 to the edge of the filter cylinder 2, and the water in the material flows out smoothly from the water outlet holes of the inner layer of the peripheral wall of the cylinder body 21. At the same time, the setting of the protrusion 812 can also reduce the squeezing force of the bottom surface of the squeezing plate 81 near the edge on the material, thereby preventing the edge of the filter cloth 71 from being stuck between the movable bottom plate 22 of the filter cylinder 2 and the inner peripheral wall of the cylinder body 21 of the filter cylinder 2, and the water outlet holes on the inner peripheral wall of the cylinder body 21, so that the cloth rolling and unloading process can be carried out smoothly, and the filter cloth 71 can be prevented from being torn, thereby increasing the service life of the filter cloth 71.

[0061] In this embodiment, the cross section of the main body 811 matches the cross section of the internal space of the filter cylinder 2, and the protrusion 812 protrudes downward from the edge of the bottom surface of the main body 811, or the protrusion 812 protrudes downward from the middle of the bottom surface of the main body 811, close to the edge, and the projection of the protrusion 812 on the horizontal plane falls within the projection of the main body 811 on the horizontal plane. The protrusion 812 is connected to the main body 811 as a whole. Specifically, the cross section of the inner cavity of the cylinder body 21 is rectangular, the cross section of the main body 811 matches the cross section of the inner cavity of the cylinder body 21, and the size of the main body 811 is slightly smaller than the cross section of the inner cavity of the cylinder body 21, and the main body 811 can be squeezed downward from the top opening of the cylinder body 21. The cross section of the outer peripheral wall of the protrusion 812 in the vertical direction is a straight line, or a smooth curve, or a part is a straight line and the other part is a smooth curve. The outer peripheral wall of the protrusion 812 and the bottom surface of the main body 811 at the periphery of the protrusion 812 constitute the bottom surface of the pressing plate 81 .

[0062] Specifically, the cross section of the upper end of the protrusion 812 can be circular, quasi-circular, or polygonal, and the upper end of the protrusion 812 only needs to be arranged within the range of the bottom surface of the main body 811. The cross section of the lower end of the protrusion 812 is circular, quasi-circular, or polygonal, and the shape of the cross section of the lower end of the protrusion 812 can be the same as the shape of the cross section of the upper end of the protrusion 812, or different from the cross section of the upper end of the protrusion 812.

[0063] In some preferred embodiments, Fig.19 and Fig. 20 As shown, the outer peripheral wall of the protrusion 812 is a curved surface as a whole, and the curved surface is formed by extending from a point below the bottom surface of the main body 811 to the direction close to the edge of the bottom surface and bending upward. The cross section of the upper end of the protrusion 812 is a circular surface tangent to the bottom surface of the main body 811. Preferably, the outer peripheral wall of the protrusion 812 is a part of a spherical surface.

[0064] In some preferred embodiments, Fig.21 As shown, the outer peripheral wall of the protrusion 812 includes a peripheral side surface extending downward from the bottom surface of the main body 811 and a lower end surface parallel to the bottom surface of the main body 811, the lower end surface is a rectangular surface that is proportionally reduced from the bottom surface of the main body 811, and the peripheral side surface of the protrusion 812 is connected between each side of the lower end surface and each corresponding edge of the bottom surface of the main body 811. The vertical section of the peripheral side surface of the protrusion 812 is a straight line or a smooth curve. The cross section of the upper end of the protrusion 812 is a rectangular surface that coincides with the bottom surface of the main body 811, or the upper end surface of the protrusion 812 is a rectangular surface that is proportionally reduced from the bottom surface of the main body 811 and is larger than the lower end surface of the protrusion 812.

[0065] Preferably, the ratio of the protrusion amount of the protrusion to the side length of the cross section at the upper end of the protrusion is 1:200~1:25. The protrusion amount of the protrusion is the vertical distance between the lowest point of the protrusion and the bottom surface of the main body. Specifically, the ratio of the maximum width of the protrusion along the vertical direction to the maximum width of the cross section at the upper end of the protrusion along the horizontal direction is 1:200~1:25. Preferably, the bottom surface of the main body is a square, the cross section at the upper end of the protrusion is a square that coincides with the bottom surface of the main body, and the ratio of the maximum width of the protrusion along the vertical direction to the side length of the bottom surface of the main body is 1:200~1:25.

[0066] Preferably, the surface roughness of at least part of the peripheral wall of the protrusion is set to Ra3.2 microns to Ra25 microns. This can avoid the problem of cloth running during the extrusion of the material by the extrusion plate, and at the same time, avoid the situation where the filter cloth is scratched due to the roughness of the peripheral wall of the protrusion. In some optional embodiments, the overall surface roughness of the peripheral wall of the protrusion is set to Ra3.2 microns to Ra25 microns, or only the surface roughness at the center of the bottom surface of the protrusion is set to Ra3.2 microns to Ra25 microns. Of course, the surface roughness of multiple areas on the peripheral wall of the protrusion can also be set to Ra3.2 microns to Ra25 microns.

[0067] Preferably, a chamfer is provided between the bottom surface of the main body 811 and the side wall of the main body 811. Thus, it is possible to avoid the bottom of the extrusion plate 81 from forming an angle less than or equal to 90°, which can better protect the filter cloth 71 and increase the service life of the filter cloth 71.

[0068] In this embodiment, the process of pushing the cloth and spreading the material can be completed directly below the extrusion plate 81 of the extrusion device 8, or it can be completed on one side of the extrusion device 8, that is, the filter cylinder 2 can include only one working position, and the filter cylinder 2 does not need to be moved, and the cloth pushing and spreading process and the extrusion dehydration process are completed at this working position. The filter cylinder 2 can also be set to include two working positions, and the filter cylinder 2 performs the cloth pushing and spreading process at one working position and the extrusion dehydration process at the other working position.

[0069] like Figure 1 and Figure 2As shown, in some possible embodiments, only one working position is provided directly below the extrusion platen 81. Specifically, a pressure-bearing member 10-2 is provided directly below the extrusion platen 81, and the filter cylinder 2 is placed on the pressure-bearing member 10-2. An installation chamber is provided in the middle of the pressure-bearing member 10-2, and a lifter 10-1 is installed in the installation chamber. The lifter 10-1 is retractable in the vertical direction. The lifter 10-1 is extended upward and can extend into the cylinder body 21 of the filter cylinder 2 from the lower opening at the bottom of the filter cylinder 2, and supports the movable bottom plate 22 in the cylinder body 21. As the lifter 10-1 is extended or retracted, the movable bottom plate 22 can be lifted and moved upward or downward. When the lifter 10-1 is in a fully retracted state, its upper end is lower than the bearing surface of the pressure-bearing member 10-2.

[0070] like Fig.18 As shown, in some other possible embodiments, the frame 4 and the extrusion device 8 are spaced apart, and a device 10 for carrying and moving the filter cylinder is arranged between the frame 4 and the extrusion device 8, and the device 10 for carrying and moving the filter cylinder includes a moving guide rail 10-4 and a fixed guide rail 10-3. The device 10 for carrying and moving the filter cylinder is configured with a first working position located directly below the extrusion plate 81, and a second working position located between the frame 4 and the extrusion device 8, and the device 10 for carrying and moving the filter cylinder drives the filter cylinder 2 to reciprocate between the first working position and the second working position.

[0071] In some specific embodiments, a fixed guide rail 10-3 is provided at the second working position, and a lifter 10-1 for lifting the movable bottom plate 22 of the filter cylinder 2 is provided between the two fixed guide rails 10-3. The lifter 10-1 can be extended upward to extend into the cylinder body 21 of the filter cylinder 2 from the lower opening at the bottom of the filter cylinder 2, and can carry the movable bottom plate 22 in the cylinder body 21. As the lifter 10-1 is extended or retracted, the movable bottom plate 22 can be lifted and moved upward or downward. When the lifter 10-1 is in a fully retracted state, its upper end is lower than the upper end of the fixed guide rail 10-3. Two movable guide rails 10-4 and a pressure-bearing member 10-2 are provided at the first working position of the device 10 for carrying and moving the filter cylinder. Every two movable guide rails 10-4 are arranged parallel to each other, and the two movable guide rails 10-4 are respectively connected to the two fixed guide rails 10-3 and are respectively in the same straight line, and the pressure-bearing member 10-2 is located between the two movable guide rails 10-4. The upper end of the pressure-bearing member 10-2 is a flat plate structure. When the filter cylinder 2 is located on the fixed guide rail 10-3, the upper end of the pressure-bearing member 10-2 is lower than the bottom end of the filter cylinder 2. The movable guide rail 10-4 can be raised and lowered. When the movable guide rail 10-4 moves upward to the limit position, its upper end is flush with the upper end of the fixed guide rail 10-3, and is used to move the cylinder body 21 from the second working position to the first working position, or from the first working position to the second working position. When the movable guide rail 10-4 drops to the lowest position, its upper end is lower than the upper end of the pressure-bearing member 10-2. At this time, the pressure-bearing member 10-2 is used to support the cylinder body 21.

[0072] In some specific embodiments, a plurality of filter cylinders 2 and racks 4 are arranged around the extrusion device 8, and each rack 4 is respectively provided with a filter cloth 71 placing and unloading winding device and a cloth pushing and spreading device 1, and the racks 4 are arranged one by one with the filter cylinders 2. The device 10 for carrying and moving the filter cylinder is provided with a first working position located directly below the extrusion platen 81, and a second working position is respectively arranged between each rack 4 and the extrusion device 8. In the above scheme, a plurality of racks are arranged around an extrusion device, and each rack is respectively arranged relative to different sides of the extrusion device, a first working position is arranged directly below the extrusion platen of the extrusion device, and a second working position is respectively arranged between different racks and different sides of the extrusion device, and a plurality of second working positions share a first working position, so that the filter cylinders matched with different racks are respectively moved back and forth between their respective second working positions and the first working position at the extrusion device, and the material laying, extrusion, material unloading and filter cloth cleaning are repeatedly and alternately performed, which can not only improve the dehydration efficiency of the material to be processed, but also reduce the equipment cost.

[0073] Embodiment 2

[0074] On the basis of the first embodiment, in the embodiment of the present invention, the specific installation structure of the first cloth pressing assembly 5 and the second cloth pressing assembly 6 is further introduced, such as Figure 5 and Figure 6 As shown, the first cloth pressing assembly 5 is arranged at the end of the first side, and the second cloth pressing assembly 6 is arranged at the middle of the second side away from the first side.

[0075] In some specific embodiments, the first cloth pressing assembly 5 is arranged in pairs at the two ends of the first side, including a pressing rod 51 arranged parallel to the first side, and a driving transmission device 52 for driving the pressing rod 51 to move horizontally along the first side, and to move up and down relative to the first side. The second cloth pressing assembly 6 is isolatedly arranged in the middle of the second side away from the first side, including a fixed part 61, and a movable part 62 that rotates with the fixed part 61, and the movable part 62 includes a cloth pressing rod 622, and the cloth pressing rod 622 rotates with the rotating shaft 621 of the movable part 62 to press / loosen the filter cloth 71.

[0076] Specifically, the top of the cylinder body 21 is open, the top of the cylinder body 21 that is open near the cloth pushing and spreading device 1 is the first side of the filter cylinder 2, and the top of the cylinder body 21 that is open away from the cloth pushing and spreading device 1 is the second side of the filter cylinder 2. The first side and the second side extend in the horizontal direction and are flush with each other in the horizontal direction. The length direction of the first side and the second side is perpendicular to the feeding direction of the cloth pushing and spreading device 1, and the first side and the second side have a certain width in the feeding direction of the cloth pushing and spreading device 1. The first cloth pressing assembly 5 and the second cloth pressing assembly 6 press the filter cloth 71 against the first side and the second side, respectively.

[0077] like Figures 7 to 10 As shown, in some specific embodiments, the pressure rod 51 includes a first position and a second position. The first position is the position where the pressure rod 51 presses the filter cloth 71 onto the filter cylinder 2, and the second position is the position where the projection of the pressure rod 51 on the horizontal plane falls outside the filter cloth 71. The driving transmission device 52 is used to drive the pressure rod 51 to move between the first position and the second position.

[0078] The driving transmission device 52 is arranged on the outer side of the upper edge of the filter cylinder 2, and includes a support seat extending in a direction parallel to the first side, a connecting rod 522 hinged at one end on the support seat, a connecting rod 523 hinged at the other end of the connecting rod 522, and a driving member 524 arranged on the side of the connecting rod 522 away from the filter cylinder 2. 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 and perpendicular to the length direction of the first side. The end of the pressure rod 51 away from the filter cylinder 2 is connected to the driving member 524, and can slide on the driving member 524 in a vertical direction perpendicular to the pressure rod 51. The connecting rod 523 is connected to the middle part of the pressure rod 51 and can slide along the length direction of the pressure rod 51. The power source 53 which can be horizontally extended and retracted along the first side edge drives the driving member 524 to move horizontally. When the driving member 524 drives the pressure rod 51 to move horizontally, the pressure rod 51 is driven to move up and down through the connecting rod 522 and the connecting rod 523 .

[0079] Specifically, the extension direction of the pressure rod 51 is parallel to the extension direction of the support frame 521 and parallel to the length direction of the first side. The extension direction of the connecting rod 523 is parallel to the length direction of the first side and is cylindrical. 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.

[0080] The driving member 524 is slidably connected to the pressure rod 51 through a guide assembly 54, which includes a slide rail 541 provided on the driving member 524, the slide rail 541 extending in the vertical direction, and a slide sleeve 542 provided at one end of the pressure rod 51 away from the filter cylinder 2 corresponding to the slide rail 541, the slide sleeve 542 being sleeved on the slide rail 541. The driving member 524 also includes an abutment portion 5241, which is arranged opposite to the side of the connecting rod 522 away from the filter cylinder 2. When the driving member 524 moves toward the filter cylinder 2, the driving member 524 pushes the pressing rod 51 to slide along the connecting rod 523 through the guide assembly 54, and feeds toward the filter cylinder 2. In this process, the connecting rod 522 is driven to rotate by the abutment portion 5241. Under the limiting and guiding action of the guide assembly 54, the pressing rod 51 slides up and down along the slide rail 541 without rotating, so that the distance between the connecting rod 523 and the support frame 521 can be changed, that is, the pressing rod 51 moves in the vertical direction. Driven by the connecting rod 523, the pressing rod 51 presses the filter cloth 71 against the filter cylinder 2.

[0081] Thus, a power source 53 can be used to drive the driving member 524 to reciprocate in the direction of approaching and moving away from the filter cylinder 2, so that the pressure rod 51 can be fed and pressed down in the direction of approaching the filter cylinder 2, and the pressure rod 51 can be retreated and lifted up in the direction of moving away from the filter cylinder 2. By setting the connecting rod 523 in a cylindrical shape, the force applied by the driving transmission device 52 to the pressure rod 51 can be applied to a certain section of the pressure rod 51 instead of a certain point on the pressure rod 51, so that the pressure rod 51 can be translated and pressed down as a whole, and the situation that the end of the pressure rod 51 away from the driving transmission device 52 is easily lifted up when the pressure rod 51 is pressing the filter cloth 71 is avoided.

[0082] The power source 53 can be a retractable device, specifically, a cylinder, a hydraulic cylinder, etc., or a linear motor, etc. It only needs to be able to drive the driving member 524 to move back and forth in the horizontal direction close to and away from the filter cylinder 2.

[0083] A force storage structure 525 is provided between the connecting rod 522 and the supporting frame 521. When the driving member 524 moves toward the direction approaching the filter cylinder 2 and drives the connecting rod 522 to rotate toward the filter cylinder 2, the force storage structure 525 stores force; when the driving member 524 moves toward the direction away from the filter cylinder 2, the force storage structure 525 is released, driving the connecting rod 522 to rotate in the direction away from the filter cylinder 2.

[0084] In some preferred embodiments, during the process of the driving member 524 moving toward the filter cylinder 2, there are a first working state in which the abutting portion 5241 and the connecting rod 522 are spaced apart, and a second working state in which the abutting portion 5241 and the connecting rod 522 are slidably matched to drive the connecting rod 522 to rotate toward the filter cylinder 2. Specifically, the first working state of the driving member 524 is that the abutting portion 5241 and the connecting rod 522 are spaced apart; the second working state of the driving member 524 is that the abutting portion 5241 and the connecting rod 522 are slidably matched to drive the connecting rod 522 to rotate toward the filter cylinder 2.

[0085] During the process of the driving member 524 moving toward the filter cylinder 2, when it is in the first working state, the driving member 524 only drives the pressing rod 51 to feed toward the filter cylinder 2, and when it is in the second working state, the driving member 524 not only drives the pressing rod 51 to feed toward the filter cylinder 2, but also drives the connecting rod 522 to rotate toward the filter cylinder 2, and drives the pressing rod 51 to move downward through the connecting rod 523. Therefore, the length of the pressing rod 51 feeding toward the filter cylinder 2 can be increased or shortened by setting the path length of the driving member 524 in the first working state during the process of moving toward the filter cylinder 2. Preferably, when the driving member 524 is in the first working state, the horizontal distance between the sliding sleeve 542 and the connecting rod 523 away from one end of the filter cylinder 2 is greater than or equal to the horizontal distance between the abutment portion 5241 and the connecting rod 522.

[0086] The force storage structure 525 can be a torsion spring arranged at the hinge axis of the connecting rod 522, or a compression spring or a tension spring arranged between the connecting rod 522 and the support frame 521, as long as it can drive the connecting rod 522 to rotate in a direction away from the filter cylinder 2.

[0087] Preferably, the force storage structure 525 is configured as a spring-type telescopic rod, which is arranged on the side of the connecting rod 522 close to 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. When the driving member 524 drives the connecting rod 522 to rotate in the direction close to the filter cylinder 2, the spring-type telescopic rod contracts, and the spring inside the spring-type telescopic rod stores force. When the driving member 524 moves in the direction away from the filter cylinder 2, the spring-type telescopic rod extends, driving the connecting rod 522 to reset. In this process, the connecting rod 523 drives the pressure rod 51 to move upward.

[0088] In this embodiment, the support frame 521 of the driving transmission device 52 can be a part of the frame 4 for carrying the cloth pushing and spreading device 1, or can be set on the filter cylinder 2, or can be set separately. The pressure rod 51 can be set above the support frame 521, or the pressure rod 51 can be set below the support frame 521, and it is only necessary to ensure that when the connecting rod 522 rotates in the direction close to the filter cylinder 2, the connecting rod 523 can drive the pressure rod 51 to press down and press the filter cloth 71 on the filter cylinder 2, and when the connecting rod 522 rotates in the direction away from the filter cylinder 2, the connecting rod 523 can drive the pressure rod 51 to lift up.

[0089] If the pressing rod 51 is arranged above the support frame 521, when the pressing rod 51 moves to the first position, the connecting rod 522 is inclined from bottom to top toward the filter cylinder 2. If the pressing rod 51 is arranged below the support frame 521, when the pressing rod 51 moves to the first position, the connecting rod 522 is inclined from bottom to top toward the filter cylinder 2. Through the above arrangement, it can be ensured that when the connecting rod 523 moves to the first position, the feeding length of the pressing rod 51 toward the top of the filter cylinder 2 is the maximum, and it can be ensured that the driving transmission device 52 can convert the force provided by the power source 53 into the pressing force of the pressing rod 51 on the filter cloth 71. Preferably, when the driving member 524 is in the first working state, the connecting rod 522 extends obliquely from bottom to top toward the filter cylinder 2.

[0090] In some preferred embodiments, the pressure rod 51 is arranged just above the support frame 521, so that the force point of the connecting rod 523 on the pressure rod 51 can be closer to the filter cylinder 2, further improving the pressing effect on the filter cloth 71. Preferably, the driving transmission device 52 is arranged near the upper edge of the filter cylinder 2, the support frame 521 is arranged below the upper edge of the filter cylinder 2, and the connecting rod 523 is arranged above the upper edge of the filter cylinder 2, so that the force effect of the driving transmission device 52 on the pressure rod 51 can be improved, and the structure of the water-containing material stacking filter press dehydration equipment can be made compact.

[0091] The pressing rod 51 is configured as a straight rod parallel to the top of the filter cylinder 2 and extending along the length direction of the first side.

[0092] Preferably, the support frame 521 is provided with a support frame 5211 protruding in a direction close to the connecting rod 523 and extending in a direction parallel to the connecting rod 523, and the driving member 524 is slidably provided on the support frame 5211, and the support frame 5211 supports and guides the driving member 524. The connecting rod 523 is provided above the support frame 521, and the vertical distance between the end of the pressure rod 51 close to 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.

[0093] Preferably, when the pressing rod 51 presses the filter cloth 71 against the top of the filter cylinder 2, the end of the pressing rod 51 away from the filter cylinder 2 abuts against the top of the support frame 5211, thereby further improving the horizontality of the pressing rod 51 and improving the pressing effect on the filter cloth 71. Preferably, when the pressing rod 51 is in the first position, the connecting rod 523 and the support frame 5211 are mutually offset in the length direction of the pressing rod 51 to avoid mutual interference.

[0094] In this embodiment, the slide rail 541 and the abutment portion 5241 are staggered along the length direction of the connecting rod 523 . The slide rail 541 is arranged at one end of the driving member 524 close to the filter cylinder 2 , and the abutment portion 5241 is arranged at one end of the driving member 524 away from the filter cylinder 2 .

[0095] In some preferred embodiments, the connecting rod 522 includes a first rod portion and a second rod portion clamped on both sides of the connecting rod 523, the upper ends of the first rod portion and the second rod portion are respectively hinged to the left and right sides of the connecting rod 523, and the lower ends of the first rod portion and the second rod portion are respectively hinged to the left and right sides of the support frame 521, and a gap is formed between the first rod portion and the second rod portion. The support frame 5211 is arranged at the gap between the first rod portion and the second rod portion, protrudes upward from the support frame 521, and extends along the length direction of the support frame 521. The driving member 524 is arranged at the top of the support frame 5211 and slides with the top of the support frame 5211.

[0096] The driving member 524 extends along the length direction of the support frame 5211, and a slide rail 541 extending upward in the vertical direction is provided at one end of the driving member 524 close to the filter cylinder 2, and a first abutting portion 5241 and a second abutting portion 5241 extending downward from the left and right sides of the support frame 5211 are provided at one end of the driving member 524 away from the filter cylinder 2, and the first abutting portion 5241 and the second abutting portion 5241 respectively correspond to the side of the first rod portion and the second rod portion away from the filter cylinder 2. Preferably, the surface of the driving member 524 for abutting against the connecting rod 522 is set as an arc surface.

[0097] The connecting rod 522 may be provided as one or a group, or may be provided as a plurality or a plurality of groups arranged at intervals along the length direction of the connecting rod 523. When the connecting rod 522 is provided as a plurality or a plurality of groups, each connecting rod 522 is of equal length and parallel to each other. Specifically, the connecting rod 522 is provided as a plurality of groups arranged at intervals along the length direction of the connecting rod 523, each connecting rod 522 is of equal length and parallel to each other, and the plurality of connecting rods 522 may be a plurality of first rod portions or second rod portions. Alternatively, the connecting rod 522 is provided as a plurality of groups arranged at intervals along the length direction of the connecting rod 523, each group of connecting rods 522 is of equal length and parallel to each other, and each group of connecting rods 522 includes a first rod portion and a second rod portion clamped on both sides of the connecting rod 523.

[0098] Preferably, the connecting rod 522 is provided with two parallel groups of equal length, which are respectively connected between the two ends of the connecting rod 523 and the support frame 521, forming a parallelogram mechanism on the support frame 521 to ensure the reliability of driving the pressure rod 51.

[0099] In some preferred embodiments, 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°, so that the parallelogram mechanism can convert more of the driving force of the driving member 524 on the connecting rod 522 into downward pressure on the pressure rod 51, thereby improving the clamping effect on the filter cloth 71.

[0100] In this embodiment, the length direction of the support frame 521, the length direction of the support frame 5211, the length direction of the connecting rod 523, and the length direction of the pressure rod 51 are all parallel to the length direction of the first side.

[0101] Preferably, the first cloth pressing assembly 5 further includes a limiting member 55 extending in the vertical direction. The limiting member 55 is disposed on both sides of the pressing rod 51 along the length direction of the pressing rod 51 and fits with both sides of the pressing rod 51 . Specifically, the limiting member 55 includes a first limiting member 551 and a second limiting member 552. The first limiting member 551 is arranged on the side of the pressure rod 51 toward the laying direction of the filter cloth 71, that is, arranged on the side of the pressure rod 51 away from the cloth pushing and spreading device 1, and is in contact with the side of the pressure rod 51 toward the laying direction of the filter cloth 71. The second limiting member 552 is arranged on the side of the pressure rod 51 opposite to the laying direction of the filter cloth 71, that is, arranged on the side of the pressure rod 51 close to the cloth pushing and spreading device 1, and is in contact with the side of the pressure rod 51 opposite to the laying direction of the filter cloth 71. The pressure rod 51 is arranged 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. Therefore, when the pressure rod 51 tends to deflect in the horizontal direction due to the pulling force in the horizontal direction, the first limiting member 551 and the second limiting member 552 stop the pressure rod 51 from both sides of the pressure rod 51 to prevent it from rotating.

[0102] Preferably, the limiting member 55 includes a first plate 55-1 and a second plate 55-2. Specifically, the first plates 55-1 of the first limiting member 551 and the second limiting member 552 extend in the vertical direction, and 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 from each other. The space between the first plates 55-1 of the first limiting member 551 and the second limiting member 552 is used for the pressure rod 51 to pass through, 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 and the second limiting member 552 in directions away from each other.

[0103] Preferably, a reinforcing rib 55-3 is provided between the first plate 55-1 and the second plate 55-2, the reinforcing rib 55-3 is perpendicular to the first plate 55-1 and the second plate 55-2, and extends vertically upward from the top of the second plate 55-2, and the side of the reinforcing rib 55-3 close to the first plate 55-1 is connected to the first plate 55-1. Preferably, the pressure rod 51 is set to be flat and parallel to the top of the filter cylinder 2. The side of the pressure rod 51 opposite to the top of the filter cylinder 2 is set to be a plane parallel to the top of the filter cylinder 2.

[0104] Preferably, the limiting member 55 is arranged at one end of the support seat close to the filter cylinder 2 , and the first limiting member 551 and the second limiting member 552 are arranged as an integral part with the support frame 521 .

[0105] Preferably, along the feeding direction of the cloth-pushing and spreading device 1, the first cloth-pressing assembly 5 is arranged on the outer side walls on the left and right sides of the filter cylinder 2, and one end of the support seat close to the filter cylinder 2 is close to the outer side wall of the filter cylinder 2. Specifically, the filter cylinder 2 includes a third side and a fourth side perpendicular to the first side and the second side, the first cloth-pressing assembly 5 is arranged outside the third side and / or the fourth side, and the extension direction of the pressing rod 51 is arranged perpendicular to the third side and the fourth side. The two first cloth-pressing assemblies 5 are respectively arranged outside the third side and the fourth side, corresponding to the open side of the first side close to the top of the cylinder body 21.

[0106] like Fig.11 and Fig.12 As shown, in some specific embodiments, the movable portion 62 of the second cloth pressing assembly 6 includes a rotating shaft 621 that is rotatably matched with the fixed portion 61, and a cloth pressing rod 622 disposed on the rotating shaft 621. The rotating shaft 621 is disposed on the outer side of the upper edge of the filter cylinder 2, higher than the top of the filter cylinder 2, and extends along the length direction of the second side edge. The cloth pressing rod 622 extends in a direction perpendicular to the rotating shaft 621. The cloth pressing rod 622 is provided with at least two cloth pressing rods 622 that are spaced apart along the axial direction of the rotating shaft 621. The cloth pressing rod 622 rotates with the rotating shaft 621 to press / loosen the filter cloth 71.

[0107] The cloth pressing rods 622 are parallel to each other and have the same length, and one end of each cloth pressing rod 622 away from the rotating shaft 621 simultaneously presses the filter cloth 71. The cloth pressing rods 622 press the filter cloth 71 at the left and right sides of the filter cloth 71 close to the laying direction, which can ensure the fixing effect of the filter cloth 71 and help prevent the material on the filter cloth 71 from flowing out from the two sides of the filter cloth 71.

[0108] The cloth pressing rod 622 presses the filter cloth 71 onto the second side. Preferably, the end of the cloth pressing rod 622, the side facing the second side, is set as a plane parallel to the second side when pressing the filter cloth 71. Specifically, the cloth pressing rod 622 extends as a whole along the radial direction of the rotating shaft 621, and includes a neck 6221 and a head 6222. The first end of the neck 6221 is connected to the rotating shaft 621, and the first end of the head 6222 is connected to the second end of the neck 6221. The first end of the head 6222 protrudes toward the second side relative to the second end of the neck 6221, and the side of the head 6222 toward the second side is set as a plane inclined in the direction away from the rotating shaft 621 and away from the second side.

[0109] Specifically, along the direction away from the rotation axis 621, the cross-sectional area of ​​the head 6222 gradually decreases, the cross-sectional area of ​​the first end of the head 6222 is greater than the cross-sectional area of ​​the second end of the head 6222, and the cross-sectional area of ​​the first end of the head 6222 is greater than the cross-sectional area of ​​the second end of the neck 6221. The left side surface of the neck 6221 and the head 6222 are coplanar, the right side surface is coplanar, and the side surface away from the second side is coplanar, so that the thickness of the head 6222 along the vertical direction perpendicular to the neck 6221 of the cloth pressing rod 622 to the head 6222 gradually decreases. Preferably, the end of the head 6222 has a certain thickness in the direction perpendicular to the cloth pressing rod 622, and the certain thickness can avoid forming a sharp angle at the second end of the head 6222. Preferably, the end of the head 6222 away from the rotation axis 621 is set to be an arc shape. Avoid the situation where the filter cloth 71 is pierced by the end of the cloth pressing rod 622.

[0110] The movable part 62 of the second cloth pressing assembly 6 is configured with a first position where the cloth pressing rod 622 rotates in the first direction to press the filter cloth 71 against the second side edge, and a second position where a certain interval is formed between the cloth pressing rod 622 and the second side edge when it rotates in the second direction. The certain interval enables the front end of the cloth pushing and spreading device 1 along the feeding direction to at least partially extend between the second side edge and the cloth pressing rod 622.

[0111] During the cloth pushing and spreading process, the filter cloth 71 is wrapped around the front end of the cloth pushing and spreading device 1 along the feeding direction. During the process in which the front end of the cloth pushing and spreading device 1 along the feeding direction pushes the filter cloth 71 and moves toward the second side of the filter cylinder 2, the movable portion 62 is in the second position, and a certain interval is formed between the cloth pressing rod 622 and the top of the filter cylinder 2. When the front end of the cloth pushing and spreading device 1 along the feeding direction pushes the filter cloth 71 and moves to the second side of the filter cylinder 2, the front end of the cloth pushing and spreading device 1 along the feeding direction at least partially extends to below the cloth pressing rod 622, the movable portion 62 rotates to the first position, and the cloth pressing rod 622 presses the filter cloth 71 against the second side of the filter cylinder 2.

[0112] When the front end of the cloth pushing and spreading device 1 along the feeding direction moves to the second side of the filter cylinder 2, the front end of the cloth pushing and spreading device 1 along the feeding direction at least partially overlaps with the moving path of the cloth pressing rod 622. During the process of the movable part 62 rotating to the first position, the cloth pressing rod 622 presses the filter cloth 71 covered on the front end of the cloth pushing and spreading device 1 along the feeding direction onto the second side of the filter cylinder 2.

[0113] In this embodiment, the front end of the cloth pushing and spreading device 1 is provided with a notch 1135 for the cloth pressing rod 622 to pass through, and the cloth pressing rod 622 passes through the notch 1135 to press the filter cloth 71 onto the filter cylinder 2. Specifically, the front end of the cloth pushing and spreading device 1 along the feeding direction is provided with a cloth pushing head 113, and two cloth pressing rods 622 correspond to the two ends extending along the length direction of the second side edge close to the cloth pushing head 113, and along the feeding direction of the cloth pushing and spreading device 1, the front end of the cloth pushing head 113 is provided with notches 1135 corresponding to the cloth pressing rods 622 one by one. The notch 1135 passes through the cloth pushing head 113 in the vertical direction, and the end of the cloth pressing rod 622 away from the rotating shaft 621 passes through the notch 1135 from top to bottom to press the filter cloth 71 covered on the cloth pushing head 113 onto the second side edge.

[0114] Preferably, the second cloth pressing assembly 6 also includes a driving member for driving the movable part 62 to rotate, and the driving member is connected to the rotating shaft 621 by transmission, and the rotating shaft 621 can be driven to rotate in any way. For example, the driving member can be a servo motor that drives the rotating shaft 621 through a gear. Preferably, the cloth pressing rod 622 is arranged on a side of the rotating shaft 621 close to the filter cylinder 2, extending in a direction perpendicular to the rotating shaft 621, and a driving rod 623 is provided on the side of the rotating shaft 621 away from the filter cylinder 2, and the driving rod 623 is connected to the driving member by transmission. A driving member connected to the driving rod 623 by transmission is provided on the fixed part 61, and the driving member is a retractable device. The two ends of the retractable device are respectively rotatably matched with the ends of the fixed part 61 and the driving rod 623.

[0115] Specifically, the telescopic device is fixedly mounted on the fixed portion 61, a bar hole is provided on the working end of the telescopic device, a rotating shaft is provided at the end of the driving rod 623, and the rotating shaft is installed in the bar hole. The length direction of the bar hole is perpendicular to the telescopic direction of the telescopic device. During the telescopic process of the telescopic device, the rotating shaft can slide along the bar hole to rotate the movable portion 62.

[0116] Preferably, the cloth pressing rod 622, the rotating shaft 621, and the driving rod 623 are integrally formed. The retractable device can be a cylinder, an oil cylinder, a linear motor, etc.

[0117] Preferably, the fixing portion 61 is arranged on the outer wall of the filter cylinder 2 away from the cloth pushing and spreading device 1, and includes a first support seat 611 and a second support seat 612. The first support seat 611 extends vertically along the length direction of the second side, and two mutually spaced shaft sleeves are arranged on the top of the first support seat 611, and the two ends of the rotating shaft 621 are respectively installed in the two shaft sleeves. The second support seat 612 is vertically arranged on the side of the first support seat 611 away from the second side, and the retractable device is arranged on the second support seat 612.

[0118] Preferably, during the process of the cloth-pushing and spreading device 1 retreating from the second side of the filter cylinder 2, the driving member 524 of the first cloth-pressing assembly 5 moves away from the filter cylinder 2, and the cloth-pushing and spreading device 1 is used to limit the lifting height of the pressing rod 51 during the process of withdrawing it from the filter cloth 71. Specifically, Figures 5 to 10 As shown, in the process of the cloth pushing and spreading device 1 retreating from the second side of the filter cylinder 2, the driving member 524 is controlled to move in the direction away from the filter cylinder 2, and the pressure rod 51 is pulled out of the filter cloth 71. During this process, the force storage structure 525 drives the connecting rod 522 to rotate in the direction away from the filter cylinder 2, and the connecting rod 523 drives the pressure rod 51 to lift up. When the pressure rod 51 rises to abut against the bottom of the cloth pushing and spreading device 1, the connecting rod 523 no longer rises under the reaction force of the pressure rod 51, and the pressure rod 51 continues to be pulled outward under the drive of the driving member 524. When the pressure rod 51 is completely pulled out of the cloth pushing and spreading device 1, the force storage structure 525 drives the connecting rod 522 to continue to rotate in the direction away from the filter cylinder 2, so that the pressure rod 51 rises to its initial position. Thus, it is possible to prevent the end of the filter cloth 71 close to the cloth pushing and spreading device 1 from being lifted too high during the movement of the pressure rod 51 to the second position. The pressure rod 51 lifts the end of the filter cloth 71 close to the cloth pushing and spreading device 1 to abut against the bottom of the cloth pushing and spreading device 1 at most, thereby ensuring the flatness of the material on the filter cloth 71. At the same time, the efficiency of cloth pushing and spreading can be improved. In this embodiment, it is sufficient to ensure that the pressure rod 51 is completely pulled out from both sides of the cloth pushing and spreading device 1 before the cloth pushing head 113 of the cloth pushing and spreading device 1 moves to the first side.

[0119] Preferably, the moving speed of the paving body 11 retreating is greater than or equal to the moving speed of the paving body 11 advancing.

[0120] Embodiment 3

[0121] On the basis of the first or second embodiment, the present invention further introduces a cloth spreading device 1 of a water-containing material stacking filter press dehydration device, such as Figures 1 to 3 ,and Figures 13 to 17 shown.

[0122] The cloth-pushing and spreading device 1 comprises a spreading body 11, and a spreading opening 1121 is arranged at the bottom of the spreading body 11. A cloth-pushing head 113 extending downwardly in an inclined manner is arranged at the front end of the spreading body 11 along the feeding direction, and the first end of the cloth-pushing head 113 is connected to the spreading body 11, and the second end of the cloth-pushing head 113 opposite to the first end of the cloth-pushing head 113 is lower than the spreading opening 1121 at least when the cloth-pushing head 113 abuts against the filter cloth 71. During the cloth-pushing and spreading process, the cloth-pushing head 113 at the front end of the spreading body 11 supports the filter cloth 71, and the filter cloth 71 is wrapped around the front end of the spreading body 11, and during the forward feeding process of the spreading body 11, the filter cloth 71 slides along the front end of the spreading body 11, so that the filter cloth 71 is dragged out from the cloth-winding roller 7, and the filter cloth 71 below the spreading body 11 is stretched flat by the reaction force, and the material is spread on the filter cloth 71 below the spreading body 11. The height difference between the second end of the cloth pushing head 113 and the paving opening 1121 can leave space for laying materials between the filter cloth 71 below the paving body 11 and the paving opening 1121, thereby preventing the materials from sticking to the paving body 11 and improving the paving effect of the sludge.

[0123] Preferably, when the cloth pushing head 113 abuts against the filter cloth 71 , the height difference between the second end of the cloth pushing head 113 and the material laying opening 1121 is greater than the thickness of the material laid on the filter cloth 71 .

[0124] A notch 1135 corresponding to the cloth pressing rod 622 is provided in the middle of the second end of the cloth pushing head 113. The notch 1135 penetrates the cloth pushing head 113 along the vertical direction perpendicular to the first end to the second end of the cloth pushing head 113, and the opening of the notch 1135 faces the direction away from the first end of the cloth pushing head 113. In the horizontal direction perpendicular to the first end to the second end of the cloth pushing head 113, the width of the cloth pressing rod 622 is smaller than the width of the notch 1135. When the second end of the cloth pushing head 113 moves to the top of the second side, the notch 1135 moves to the bottom of the cloth pressing rod 622, the movable part 62 rotates to the first position, and the end of the cloth pressing rod 622 away from the rotating shaft 621 passes through the notch 1135 from top to bottom, pressing the filter cloth 71 wrapped on the second end of the cloth pushing head 113 onto the filter cylinder 2.

[0125] Preferably, when the cloth pushing head 113 contacts the filter cloth 71, in the direction from the first end to the second end of the cloth pushing head 113, at least the top of the cloth pushing head 113 is set as a downwardly inclined plane. In the process of the cloth pressing rod 622 pressing the cloth, the inclined surface at the top of the cloth pushing head 113 can be used to unload the force, so that the filter cloth 71 slides downward along the downwardly inclined plane at the top of the cloth pushing head 113 under the force of the cloth pressing rod 622, which can reduce the shear force on the filter cloth 71 and avoid tearing the filter cloth 71.

[0126] Preferably, the cloth pushing head 113 is tilted downward from the first end to the second end of the cloth pushing head 113, and the thickness of the cloth pushing head 113 in the direction perpendicular to the first end to the second end gradually decreases. Thus, the end of the cloth pressing rod 622 can smoothly pass through the notch 1135 to press the filter cloth 71 against the filter cylinder 2. At the same time, the cloth pushing head 113 of the material spreading body 11 is used to push the filter cloth 71 forward to pull the filter cloth 71 out of the cloth winding roller 7, which is conducive to reducing the resistance of the cloth pushing head 113 to the filter cloth 71, and at the same time, it can avoid the filter cloth 71 from having too much excess at the second side of the filter cylinder 2.

[0127] Preferably, the second end of the cloth pushing head 113 is configured to be arc-shaped.

[0128] Preferably, the second end of the cloth pushing head 113 is a solid cylinder 1134 having a diameter smaller than the thickness of the front end of the material paving body 11, and the solid cylinder 1134 is connected to the material paving body 11 through a support plate extending downwardly from the front end of the material paving body 11, and the end of the support plate away from the solid cylinder 1134 is the first end of the cloth pushing head 113. The solid cylinder 1134 is arranged in front of the material paving body 11, spaced apart from the material paving body 11, and connected to the front end of the material paving body 11 through the support plate. The solid cylinder 1134 constitutes the second end of the cloth pushing head 113.

[0129] Preferably, the diameter of the solid cylinder 1134 is smaller than the thickness of the front end of the material laying body 11; the support plates include two, which extend obliquely from the outer peripheral wall of the solid cylinder 1134 to the upper and lower edges of the front end of the material laying body 11, and the end of the support plate away from the solid body constitutes the first end of the cloth pushing head 113. One end of the support plate is connected to the solid cylinder 1134 as a whole, and the other end is connected to the front end of the material laying body 11. The end of the support plate is smoothly connected to the outer peripheral wall of the solid cylinder 1134, so that the second end of the cloth pushing head 113 forms a smooth surface to avoid scratching the filter cloth 71 during the cloth pushing process. Preferably, the two support plates are tangent to the upper and lower sides of the solid cylinder 1134, respectively.

[0130] Preferably, a reinforcing plate 1133 is provided between the two supporting plates to reinforce the structure of the cloth pushing head 113 .

[0131] like Figures 13 to 16 As shown, in some specific embodiments, the extension length of the support plate connected to the solid column 1134 from the bottom of the solid column 1134 is smaller than the extension length of the support plate connected to the solid column 1134 from the top of the solid column 1134, and the reinforcing plate 1133 is arranged between one end of the support plate connected to the solid column 1134 from the bottom of the solid column 1134 away from the solid column 1134 and the middle part of the support plate connected to the solid column 1134 from the top of the solid column 1134.

[0132] In some possible embodiments, the cloth pushing head 113 is connected to the material spreading body 11 as a whole, and the second end of the cloth pushing head 113 is lower than the material spreading opening 1121. In order to prevent the cloth pushing head 113 from scratching the material under the material spreading body 11, when the material spreading body 11 retreats, the movable bottom plate of the filter cylinder can be controlled to move downward so that the cloth pushing head 113 and the material spread on the filter cloth can be avoided. In some preferred embodiments, the movable bottom plate initially moves to a position slightly lower than the top of the filter cylinder 2, and the interval between the movable bottom plate and the top of the filter cylinder 2 is greater than or equal to the thickness of the material spread on the filter cloth 71; when the front end of the cloth pushing and spreading device 1 moves to the outside of the first side along the feeding direction, the movable bottom plate of the filter cylinder 2 moves downward by a stroke that matches the thickness of the material spread on the filter cloth 71 and the sum of the thickness of the filter cloth 71.

[0133] like Fig.15 and Fig.16 As shown, in some other possible embodiments, the cloth pushing head 113 is rotatably matched with the material laying body 11. Thus, when the material laying body 11 is fed forward, the cloth pushing head 113 can be controlled to rotate downward, so that the second end of the cloth pushing head 113 is lower than the material laying opening 1121, and a height difference greater than the thickness of the material laid on the filter cloth is formed between the cloth pushing head 113 and the material laying opening 1121. When the material laying body 11 is retracted, the cloth pushing head 113 can be controlled to rotate upward, so that the second end of the cloth pushing head 113 is higher than the material on the filter cloth 71, which can prevent the cloth pushing head 113 from scraping the material under the material laying body 11 and preventing the material from sticking to the cloth pushing head 113, thereby improving the material paving effect. At the same time, it is beneficial to increase the retraction speed of the material laying body 11 and the material laying rate.

[0134] Preferably, the cloth-pushing head 113 includes a first position that rotates upward to an upper limit, and a second position that rotates downward to a lower limit. When the cloth-pushing head 113 is in the first position and the second position, the height difference of the second end of the cloth-pushing head 113 is greater than the thickness of the material laid on the filter cloth. Preferably, an elastic member is provided between the cloth-pushing head 113 and the material-laying body 11, and the elastic member is used to drive the cloth-pushing head 113 to rotate toward the first position. During the forward feeding of the material-laying body 11, the reaction force applied by the filter cloth 71 to the cloth-pushing head 113 is greater than the elastic force of the elastic member. The cloth-pushing head 113 rotates toward the second position under the drive of the reaction force of the filter cloth 71. Thus, the cloth-pushing head 113 can be automatically switched between the first position and the second position, and can match the cloth-pushing and material-laying action of the material-laying body 11. Specifically, in this embodiment, when the cloth pushing head 113 rotates to the first position, the height of the axis of the solid cylinder 1134 is lower than the height of the rotation center of the cloth pushing head 113, thereby ensuring that the cloth pushing head 113 can rotate smoothly to the second position under the reaction force of the filter cloth 71.

[0135] like Fig.15 and Fig.16As shown, in some specific embodiments, the front end surface of the material laying body 11 can be used to limit the rotation of the cloth pushing head 113. Specifically, the rotating shaft can be set between the middle of the front end surface of the material laying body 11 and the cloth pushing head 113, and a gap for the cloth pushing head 113 to rotate is set between the cloth pushing head 113 and the material laying body 11. When the cloth pushing head 113 rotates to the first position, the upper end of the cloth pushing head 113 close to the material laying body 11 abuts against the front end of the material laying body 11, and when the cloth pushing head 113 rotates to the second position, the lower end of the cloth pushing head 113 close to the material laying body 11 abuts against the front end of the material laying body 11. The elastic member used to drive the cloth pushing head 113 to rotate to the first position can be a torsion spring.

[0136] Preferably, the upper edge of the front end of the material spreading body 11 and / or the upper edge of the first end of the cloth pushing head is provided with an arc chamfer to avoid scratching the filter cloth.

[0137] When the working end of the first cloth pressing assembly 5 presses the filter cloth 71 on the first side of the filter cylinder 2 onto the filter cylinder 2, the top of the working end of the first cloth pressing assembly 5 is slightly lower than the bottom of the second end of the cloth pushing head 113, allowing the cloth pushing head 113 to pass smoothly.

[0138] Preferably, the height difference between the bottom of the second end of the cloth pushing head 113 and the top of the working end of the first cloth pressing assembly 5 is greater than or equal to the thickness of the filter cloth 71 .

[0139] Preferably, the material spreading opening 1121 is arranged at the bottom of the material spreading body 11 and close to the front end of the material spreading body 11, that is, the material spreading opening 1121 is arranged close to the cloth pushing head 113, so that the material can be spread all over the filter cloth 71 below.

[0140] Preferably, the cloth pushing and spreading device 1 is a double-layer structure, including a base 12 and a spreading body 11 installed on the base 12 .

[0141] The base 12 is mounted on the frame 4 through the first guide assembly 54, and the material-laying body 11 is mounted on the base 12 through the second guide assembly 54. One end of the driving device is connected to the base 12, and the other end is connected to the material-laying body 11. Therefore, before pushing and paving the material, the base 12 can be driven by the front driving device between the base 12 and the frame 4 to carry the material-laying body 11 and move along the first guide assembly 54 to approach the filter cylinder 2. In the process of pushing and paving the material, the driving device only needs to drive the material-laying body 11 to reciprocate above the filter cylinder 2. The elongated length of the driving device is maintained in a relatively small range, which is conducive to ensuring the smoothness of the reciprocating motion of the material-laying body 11, and can improve the efficiency and control accuracy of pushing and paving the material. At the same time, the driving device with a small stroke can realize the driving of the material-laying body 11, which is conducive to reducing the cost of the equipment.

[0142] The first guide assembly 54 and the second guide assembly 54 may be a sliding guide rail structure or a rolling guide rail structure. The extension direction of the first guide assembly 54 is parallel to the extension direction of the second guide assembly 54. During the movement of the base 12 along the first guide assembly 54, the front end of the cloth pushing body of the cloth pushing and spreading device 1 and the first side of the filter cylinder 2 are close to each other and always aligned. The driving device and the front driving device may be any one of a hydraulic cylinder, an air cylinder, and a linear motor, or a combination of two or more thereof.

[0143] In this embodiment, the material laying body 11 includes a shell 111 and a material laying pipe 112 installed in the shell 111. An opening is provided at the bottom of the shell 111. The material laying pipe 112 is installed in the shell 111, and a material laying port 1121 of the material laying pipe 112 is provided in the opening.

[0144] The material spreading opening 1121 extends vertically downward from the opening, and at least a portion of the material spreading opening 1121 extends to below the opening.

[0145] The opening is a strip-shaped opening extending in a feeding direction perpendicular to the material laying main body 11, and extends in the feeding direction perpendicular to the material laying main body 11. The material laying openings 1121 of each material laying pipe 112 are arranged along the length direction of the opening. The material laying openings 1121 of each material laying pipe 112 have the same width along the feeding direction of the material laying main body 11, and the discharge openings of each material laying pipe 112 are aligned with each other along the feeding direction perpendicular to the material laying main body 11.

[0146] The material laying pipe 112 includes an input section 1122, a diameter-reducing section 1123 and an output section 1124 which are sequentially arranged along the feeding direction of the material laying body 11 and respectively have channels. The output section 1124 is arranged in a flat shape, and the material laying port 1121 bends and extends downward from the end of the output section 1124. The first end of the diameter-reducing section 1123 is connected to the input section 1122, and the second end of the diameter-reducing section 1123 is connected to the first end of the output section 1124, so that the channel of the diameter-reducing section 1123 is connected to the channels of the input section 1122 and the output section 1124.

[0147] The channel of the output section 1124 has the same cross-section perpendicular to the forward direction of the material, and the bottom surface of the output section 1124 that supports the material is a plane; the cross-sectional area of ​​the channel of the reducing section 1123 at the second end is smaller than the cross-sectional area at the first end, and the vertical cross-section of the channel of the output section 1124 is the same as the vertical cross-section of the channel of the reducing section 1123 at the second end.

[0148] The material from the input section 1122 enters the output section 1124 from the end of the variable diameter section 1123 with a larger vertical cross-sectional area. The change in the vertical cross-sectional area of ​​the channel of the output section 1124 causes a pressurization effect in the channel of the output section 1124, and the material is distributed wider in the horizontal direction (i.e., the width of the channel) perpendicular to the material flow in the output section 1124. After flowing into the output section 1124 from the end of the variable diameter section 1123 with a smaller vertical cross-sectional area, the material is further distributed wider horizontally in the channel of the output section 1124, and can occupy the entire channel of the output section 1124, and evenly flows out from the material laying port 1121 of the output section 1124 and is laid on the filter cloth. Preferably, in the horizontal direction perpendicular to the material flow direction, the width of the second end of the channel of the variable diameter section 1123 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 channel of the variable diameter section 1123 is less than the height of the first end.

[0149] In an optional solution, the width of the passage of the variable diameter section 1123 gradually increases from the first end to the second end. The height of the passage of the variable diameter section 1123 gradually decreases from the first end to the second end. The material enters the passage through the first end of the variable diameter section 1123, and the pressure gradually increases during the forward movement, and the material occupies the variable diameter section 1123 and is continuously dispersed from the center to both sides.

[0150] Considering the convenience of processing and assembly, the vertical cross-section of the channel at the first end of the reducing section 1123 can be circular or quasi-circular.

[0151] The width direction of the vertical cross section of the channel of the diameter-reducing section 1123 at the second end is a polygon with straight lines. Preferably, it can be a polygon with parallel upper and lower sides, such as a parallelogram, a rectangle, etc.

[0152] In some embodiments, the cross-sectional area of ​​the channel of the reducing section 1123 at the second end is 0.7-1.0 times the cross-sectional area of ​​the first end.

[0153] In some embodiments, the ratio of the length of the reducing section 1123 in the material flow direction to the width of the channel of the reducing section 1123 at the second end is 1:0.6-1:3. The width of the second end of the reducing section 1123 refers to the length of the channel of the output section 1124 in the horizontal direction perpendicular to the material flow direction. The length of the reducing section 1123 refers to the length between the first end and the second end. In some embodiments, in the material flow direction, the ratio of the length L1 of the reducing section 1123 to the length L2 of the output section 1124 is 1:0.5-1:8.

[0154] The vertical cross section of the channel of the output section 1124 is a polygon with straight lines in the width direction. Preferably, it can be a polygon with parallel upper and lower sides; more preferably, the structures on both sides between the top and bottom surfaces of the channel of the output section 1124 are symmetrically arranged. For example, the vertical cross section of the channel of the output section 1124 can be a rectangle, etc. That is, the channel of the output section 1124 has the same shape as the vertical cross section of the channel of the variable diameter section 1123 at the second end. The materials discharged from the second end of the variable diameter section 1123 flow into the channel of the output section 1124 in the direction of the two side walls in the width direction, and the materials can be continuously dispersed throughout the bottom of the channel of the output section 1124, and flow out evenly through the outlet of the output section 1124.

[0155] The upper end of the material paving opening 1121 is set to be an arc shape smoothly connected to the output section, and the material paving opening 1121 is downward. The lower end of the material paving opening 1121 is set to have a vertical cross-section that is the same as the vertical cross-section of the output section channel, preferably a rectangle.

[0156] The outside of the material laying body 11 is provided with a feed pipe 15 connected to the material laying pipe 112. The feed pipe 15 is connected to the material laying pipe 112 and is used to convey materials to the material laying body 11. The material laying pipe is connected to the silo 9 for holding materials through the feed pipe. In order to adapt to the reciprocating motion of the material laying body 11, the feed pipe 15 is generally set as a hose. By setting the feed pipe 15 as a hose, the feed pipe 15 can move forward and backward with the base 12 and the material laying body 11, without the need to install an additional pipe shaft with a steering function like a hard pipe. The complexity of the device is greatly reduced and the durability is improved.

[0157] Embodiment 4

[0158] On the basis of the first embodiment, the second embodiment or the third embodiment, the present invention further introduces a structure of a filter cloth finishing component of a water-containing material stacking filter press dehydration device, such as Figures 1 to 4 shown.

[0159] The filter cloth finishing assembly includes a plurality of cloth guide rollers 41 arranged between the cloth winding roller 7 and the filter cylinder 2. The cloth guide rollers 41 and the cloth winding rollers 7 are both rotatably installed on the frame. The cloth guide rollers 41 are parallel to the cloth winding rollers 7, and the cloth guide rollers 41 and the cloth winding rollers 7 are aligned in the axial direction. The filter cloth 71 passes around each cloth guide roller 41 in turn, and extends from the top of the cloth pushing and spreading device 1 to the front side of the cloth pushing and spreading device 1 along the feeding direction. The first cloth pressing assembly 5 presses the filter cloth 71 against the filter cylinder 2.

[0160] In some embodiments, the cloth rolling roller 7 is arranged on the frame at the rear side of the cloth pushing and spreading device 1 along the feeding direction, and the filter cylinder 2 is arranged on the side of the frame 4 away from the cloth rolling roller 7, that is, on the side of the frame 4 toward the feeding direction of the cloth pushing and spreading device 1.

[0161] The cloth guide roller 41 includes a head cloth guide roller 41-1 arranged near the cloth winding roller 7, a terminal cloth guide roller 41-2 arranged near the filter cylinder 2, and an intermediate cloth guide roller arranged between the head cloth guide roller 41-1 and the terminal cloth guide roller 41-2. According to the traveling direction of the filter cloth 71 when placing the cloth, the filter cloth 71 is sequentially wound around the head cloth guide roller 41-1, the intermediate cloth guide roller and the terminal cloth guide roller 41-2, and extends to the front side of the cloth pushing and spreading device 1 along the feeding direction.

[0162] In some preferred embodiments, the middle cloth guide roller is arranged above the cloth pushing and spreading device 1, and includes two layers arranged in the vertical direction. According to the traveling direction of the filter cloth 71 when placing the cloth, the filter cloth 71 is wound around the middle cloth guide roller of the lower layer and the middle cloth guide roller of the upper layer in sequence. The head end cloth guide roller 41-1 is arranged at the rear side and the bottom of the cloth pushing and spreading device 1, and the head end cloth guide roller 41-1 is arranged on the side of the cloth rolling roller 7 close to the cloth pushing and spreading device 1, and the head end cloth guide roller 41-1 is spaced apart from the cloth rolling roller 7 in the horizontal direction.

[0163] A lower layer middle cloth guide roller closest to the cloth winding roller 7 in the horizontal direction is arranged above the head end cloth guide roller 41-1, and the filter cloth 71 bypasses the head end cloth guide roller 41-1 and bypasses from the upper side of the lower layer middle cloth guide roller closest to the cloth winding roller 7, and the filter cloth 71 between the lower layer middle cloth guide roller closest to the cloth winding roller 7 and the head end cloth guide roller 41-1 extends in the vertical direction, and the positioner of the filter cloth reeling and winding assembly corresponds to the filter cloth 71 here.

[0164] The cleaner 42 of the filter cloth finishing assembly is arranged between the middle cloth guide roller of the lower layer and the middle cloth guide roller of the upper layer.

[0165] The intermediate cloth guide roller of the lower layer is staggered with the intermediate cloth guide roller of the upper layer in the horizontal direction. When the filter cloth 71 is wound from the intermediate cloth guide roller of the lower layer to the intermediate cloth guide roller of the upper layer, it extends upward at an angle. The cleaner 42 corresponds to the inclined extended filter cloth 71. The cleaner 42 includes a flushing back plate 422 arranged on the lower side of the filter cloth 71 and a flushing component 421 arranged on the upper side of the filter cloth 71.

[0166] like Figure 4As shown, in some preferred embodiments, the flushing back plate 422 is set as a flat plate, and along the length and / or width direction of the filter cloth 71, the flushing back plate 422 extends obliquely relative to the filter cloth 71, and the angle between the flushing back plate 422 and the length direction of the filter cloth 71 is greater than or equal to 2°, and less than or equal to 5°, and / or, the angle between the flushing back plate 422 and the width direction of the filter cloth 71 is greater than or equal to 2°, and less than or equal to 5°. Thus, it can be ensured that when the filter cloth 71 is placed, a large area of ​​contact between the filter cloth 71 and the flushing back plate 422 is avoided, thereby reducing the friction generated between the filter cloth 71 and the flushing back plate 422, thereby reducing the tension along the length direction of the filter cloth 71 during the placing process, and reducing the deformation of the filter cloth 71 to ensure that the filter cloth 71 has enough width when carrying materials, and ensure the wrapping effect of the filter cloth 71 on the materials.

[0167] In some preferred embodiments, a gap is provided between the flushing back plate 422 and the filter cloth 71, and the gap between the flushing back plate 422 and the filter cloth 71 is greater than or equal to 10 mm and less than or equal to 15 mm. Thus, when flushing the filter cloth 71, it is possible to avoid excessive deformation of the filter cloth 71, and at the same time, it is possible to further reduce the resistance of the flushing back plate 422 to the filter cloth 71 during the cloth placing process, and even eliminate the resistance of the flushing back plate 422 to the filter cloth 71.

[0168] In this embodiment, in the horizontal direction, the lower intermediate cloth guide roller with the smallest distance from the filter cylinder 2 is the first cloth guide roller 411, and the upper intermediate cloth guide roller with the largest distance from the filter cylinder 2 is the second cloth guide roller 412. According to the traveling direction of the filter cloth 71 when the filter cloth 71 is rolled up, the filter cloth 71 is sequentially wound on the second cloth guide roller 412 and the first cloth guide roller 411. At this time, the surface of the filter cloth 71 used for wrapping the material is turned to the upper side, that is, when the filter cloth 71 is located between the first cloth guide roller 411 and the second cloth guide roller 412, the upper side surface of the filter cloth 71 is the surface used for wrapping the material. In this embodiment, by directly flushing the surface of the filter cloth 71 used for wrapping the material, the cleaning effect of the cleaner 42 on the filter cloth 71 can be improved.

[0169] The filter cloth unloading and unloading and winding device also includes a water collecting and draining device 43, which is arranged below and around the filter cloth 71 corresponding to the cleaning device 42, and includes a bottom wall and a surrounding wall, and at least the upper end of the surrounding wall corresponding to the washing back plate 422 extends to a position higher than the liquid spraying port of the washing component 421. A drainage port is provided at the bottom of the water collecting and draining device 43, and the water collecting and draining device 43 is used to collect the washing liquid sprayed by the washing component 421 and discharge it from the drainage port.

[0170] In this embodiment, a water collecting and draining device 43 for collecting the washing liquid sprayed by the flushing member 421 is arranged above the cloth pushing and spreading device 1. Specifically, Figure 1 and Figure 2 As shown, the two ends of the wall of the water collecting drain 43 arranged along the feeding direction of the cloth pushing and spreading device 1 respectively extend to the side of the first cloth guide roller 411 away from the second cloth guide roller 412, and the side of the second cloth guide roller 412 away from the first cloth guide roller 411, that is, the horizontal projections of the first cloth guide roller 411 and the second cloth guide roller 412 both fall into the water collecting drain 43.

[0171] like Figures 1 to 3 As shown, in this embodiment, the end cloth guide roller 41-2 is arranged close to the top of the filter cylinder 2 on the side close to the frame 4, and the vertical distance between the end cloth guide roller 41-2 and the top of the filter cylinder 2 is greater than the vertical distance between the top of the cloth pushing and spreading device 1 and the top of the filter cylinder 2. After the filter cloth 71 passes around the lower side of the end cloth guide roller 41-2, it is pressed against the filter cylinder 2 by the first cloth pressing assembly 5. In this embodiment, a discharge collecting hopper 3 for collecting dehydrated materials is provided between the cloth pushing and spreading device 1 and the filter cylinder 2, and the unloading assembly corresponds to the filter cloth 71 directly above the discharge collecting hopper 3.

[0172] In some specific embodiments, the terminal cloth guide roller 41-2 is arranged directly above the discharge collecting hopper 3, and a scraper plate is provided at the terminal cloth guide roller 41-2, and / or, the intermediate cloth guide roller adjacent to the terminal cloth guide roller 41-2 is arranged directly above the discharge collecting hopper 3, and a scraper plate is provided at the intermediate cloth guide roller adjacent to the terminal cloth guide roller 41-2.

[0173] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A water-containing material stacking filter press dehydration device, comprising: A filter cylinder (2), wherein a plurality of layers of materials to be processed wrapped by filter cloth (71) are laid up and down in the filter cylinder (2); An extrusion device (8) is arranged above the filter cylinder (2), and comprises an extrusion pressing plate (81) for extruding the material in the filter cylinder (2); The feature is that the extrusion plate (81) comprises a main body (811), a protrusion (812) protruding downward is arranged on the bottom surface of the main body (811), and the cross section of the protrusion (812) gradually decreases from top to bottom; The cross section of the main body (811) matches the cross section of the internal space of the filter cylinder (2); The protrusion (812) is coaxial with the axis of the main body (811) in the vertical direction, and the protrusion (812) protrudes downward from the edge of the bottom surface of the main body (811), or the protrusion (812) protrudes downward from the middle of the bottom surface of the main body (811), and the edge of the upper end of the protrusion (812) is close to the edge of the bottom surface of the main body (811), and the projection of the protrusion (812) on the horizontal plane falls within the projection of the main body (811) on the horizontal plane; The ratio of the maximum width of the protrusion along the vertical direction to the maximum width of the cross section of the upper end of the protrusion along the horizontal direction is 1:200-1:

25.

2. The water-containing material stacking filter press dehydration equipment according to claim 1 is characterized in that: The cross section of the outer peripheral wall of the protrusion (812) in the vertical direction is a straight line, or a smooth curve, or one part is a straight line and the other part is a smooth curve.

3. The water-containing material stacked filter press dehydration equipment according to claim 1 or 2, characterized in that: The surface roughness of at least a portion of the outer peripheral wall of the protrusion (812) is set to Ra3.2 microns to Ra25 microns.

4. The water-containing material stacking filter press dehydration equipment according to claim 1 or 2, characterized in that: A chamfer is provided between the bottom surface of the main body (811) and the side wall of the main body (811).

5. The water-containing material stacked filter press dehydration equipment according to claim 1 or 2, characterized in that: A frame (4) is provided on one side of the filter cylinder (2), and a cloth pushing and spreading device (1) is installed on the frame (4). The cloth pushing and spreading device (1) reciprocates above the filter cylinder (2) in a horizontal direction, lays filter cloths (71) in layers in the filter cylinder (2) and sprays materials onto the filter cloths (71); A cloth pushing head (113) that can rotate up and down is provided at the front end of the cloth pushing and spreading device (1) along the feeding direction. When the cloth pushing head (113) rotates downward to the lower limit position, the height difference between the front end of the cloth pushing head (113) along the feeding direction of the cloth pushing and spreading device (1) and the spreading opening (1121) of the cloth pushing and spreading device (1) is greater than the thickness of the material spread on the filter cloth (71).

6. The water-containing material stacked filter press dehydration equipment according to claim 5 is characterized in that: A cloth guide roller (41) is arranged on the frame (4) above the cloth pushing and spreading device (1), and the filter cloth (71) passes over the cloth guide roller (41) from above the cloth pushing and spreading device (1) to the front side of the cloth pushing and spreading device (1) along the feeding direction; a first cloth pressing assembly (5) is arranged on the first side edge of the top of the filter cylinder (2) close to the frame (4), and the first cloth pressing assembly (5) is used to press the filter cloth (71) against the first side edge; A second cloth pressing assembly (6) is arranged on a second side of the top of the filter cylinder (2) away from the frame (4); when the cloth pushing head (113) moves to above the second side of the filter cylinder (2), the second cloth pressing assembly (6) is used to press the filter cloth (71) onto the second side.

7. The water-containing material stacked filter press dehydration equipment according to claim 6 is characterized in that: The cloth pushing and spreading device (1) comprises a base (12) slidably mounted on a frame (4), and a spreading body (11) slidably mounted on the base (12); the frame (4) is provided with a front drive device for driving the cloth pushing and spreading device (1) as a whole to advance / retreat; and the base (12) is provided with a drive device for driving the spreading body (11) to advance / retreat relative to the base (12).

8. The water-containing material stacking filter press dehydration equipment according to claim 7 is characterized in that: The material laying body (11) comprises a shell (111) and a material laying pipe (112) installed in the shell (111), the material laying pipe (112) comprises a plurality of pipes arranged in a horizontal direction perpendicular to the feeding direction of the material laying body (11), and the material laying pipe (112) is connected to a silo (9) for containing materials through a material conveying pipe (15); The material laying pipe (112) comprises an input section (1122), a diameter-reducing section (1123) and an output section (1124) each having a channel. The first end of the diameter-reducing section (1123) is connected to the input section (1122), and the second end of the diameter-reducing section (1123) is connected to the output section (1124). From the first end to the second end of the diameter-reducing section (1123), the width of the channel gradually increases, and the height of the channel gradually decreases. The material laying opening (1121) is arranged at one end of the output section (1124) away from the diameter-reducing section (1123). The material laying opening (1121) bends and extends downward, and is connected to the outside of the shell (111) from the bottom of the shell (111).

9. The water-containing material stacked filter press dehydration equipment according to claim 5, characterized in that: A water collecting and draining device (43) with an open top is arranged on the frame (4) above the cloth pushing and spreading device (1), and at least a portion of the filter cloth (71) is arranged above the water collecting and draining device (43) and corresponds to the water collecting and draining device (43) in the vertical direction; A washer (42) is arranged on the upper and lower sides of the filter cloth (71) corresponding to the water collecting and draining device (43) in the vertical direction; the washer (42) comprises a flushing back plate (422) arranged on the lower side of the filter cloth (71) and a flushing component (421) arranged on the upper side of the filter cloth (71); an angle is formed between the flushing back plate (422) and the corresponding filter cloth (71).

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