Cloth pressing assembly for dewatering equipment and dewatering equipment

Abstract

The invention provides a cloth pressing assembly for dehydration equipment and the dehydration equipment. The cloth pressing assembly for the dehydration equipment comprises a pressing rod used for pressing filter cloth to the top of a filter cylinder; and a plane parallel to the top of the filter cylinder is arranged on the pressing rod extending along the horizontal direction and at least at the position propped against the filter cloth. The position, used for abutting against the filter cloth, on the pressing rod is arranged to be the plane parallel to the top of the filter cylinder, so that when the pressing rod presses the filter cloth to the top of the filter cylinder, the filter cloth is clamped and fixed through the plane at the bottom of the pressing rod and the plane at the top of the filter cylinder, and the fixing effect on the filter cloth can be improved; and the condition that the end part of the filter cloth is loosened in the cloth pushing and spreading process can be avoided.

Description

Technical Field

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

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

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

[0004] The filter cloth of the stacking and squeezing device is generally an extra-long continuous filter cloth. During operation, multiple layers of filter cloth need to be stacked and spread, and the sludge needs to be evenly spread between the filter cloths. When the stacking and squeezing device is stacking filter cloths and spreading materials, a cloth pressing assembly is required to fix the filter cloth. It is mainly composed of two sets of front and rear cloth pressing assemblies. The filter cloth is fixed by the front and rear sets of cloth pressing assemblies during the spreading process. Specifically, the proximal end of the filter cloth is first pressed by the front cloth pressing assembly, and the filter cloth is fed forward by the discharge port of the sludge spreading mechanism. The discharge port of the sludge spreading device applies a horizontal force to the filter cloth to flatten the filter cloth. When the sludge spreading mechanism reaches the extreme position at the farthest end, the rear cloth pressing assembly presses the far end of the filter cloth, and then the sludge spreading mechanism retreats. When the discharge port of the sludge spreading mechanism exits the filter cylinder, the front cloth pressing assembly is pulled out from both sides of the filter cloth and then pressed onto the upper layer of filter cloth.

[0005] The front cloth pressing assembly of the existing stacking and squeezing device usually uses a pressing rod to press the filter cloth. However, the pressing rod of the existing front cloth pressing assembly is usually cylindrical. For example, the Chinese utility model patent with application number CN202023099235.0 discloses a fixing device for stacking filter cloth. According to the drawings in its specification, its pressing rod is a cylindrical thin rod. In this scheme, the contact area between the pressing rod of the front cloth pressing assembly and the filter cloth is small, and the fixing effect of the filter cloth is poor. In the process of the sludge spreading device feeding forward, the end of the filter cloth is prone to loosening, and the laying effect of the filter cloth is poor.

[0006] Therefore, designing a cloth pressing assembly for a dehydration device that can improve the fixing effect of the filter cloth and prevent the ends of the filter cloth from loosening during the cloth pushing process has become a technical problem that needs to be solved urgently by technical personnel in this field. Summary of the invention

[0007] The invention provides a cloth pressing assembly for dewatering equipment, which is used to solve the problem that the existing cloth pressing assembly has a poor fixing effect on the filter cloth.

[0008] Another object of the present invention is to solve the problem that the end of the pressure rod away from the driving transmission device is easily lifted up when the pressure rod of the existing cloth pressing assembly presses the filter cloth by arranging a sleeve connection between the driving transmission device and the pressure rod.

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

[0010] The cloth pressing assembly for dehydration equipment comprises a pressing rod for pressing the filter cloth against the top of the filter cylinder; at least the part of the pressing rod extending in the horizontal direction for contacting with the filter cloth is set as a plane parallel to the top of the filter cylinder.

[0011] Furthermore, the pressure rod extends horizontally in a direction perpendicular to the length of the filter cloth; and the vertical cross section of the pressure rod at the position where the pressure rod contacts the filter cloth is set to be rectangular, arched or trapezoidal.

[0012] Furthermore, the vertical cross-section of the pressure rod used for contacting the filter cloth has a width in the vertical direction that is less than or equal to the width in the horizontal direction; preferably, anti-slip grooves are provided on the plane of the pressure rod used for contacting the filter cloth; preferably, anti-slip grooves are provided at the top of the filter cylinder corresponding to the pressure rod.

[0013] Furthermore, when the pressure rod is in the first position, the filter cloth is pressed against the top of the filter cylinder, and when the pressure rod is in the second position, the horizontal projection of the pressure rod falls outside the filter cloth; a driving transmission device for driving the pressure rod to move between the first position and the second position is socketed with the pressure rod.

[0014] Furthermore, the driving transmission device includes: a transmission mechanism, including a connecting rod, and a connecting rod hinged to the connecting rod, the connecting rod including at least two groups of equal lengths and spaced apart along the length direction of the connecting rod to form a parallelogram structure; the connecting rod is sleeved on the pressure rod, or the pressure rod is sleeved on the connecting rod; a driving member is arranged at one end of the transmission mechanism of the parallelogram structure, reciprocates along a direction parallel to the connecting rod, is respectively connected to the pressure rod and the connecting rod, and drives the connecting rod to rotate during the process of the pressure rod sliding along the connecting rod; preferably, the connecting rod is cylindrical, the connecting rod is sleeved in the middle of the pressure rod, and can slide along the length direction of the pressure rod, and the length of the connecting rod is smaller than the length of the pressure rod.

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

[0016] Furthermore, in the process of the driving member driving the pressure rod to slide toward the second end of the pressure rod: in the first working state, the abutment portion and the connecting rod are spaced apart; in the second working state, the abutment portion slides and cooperates with the side of the connecting rod away from the second end of the pressure rod, driving the connecting rod to rotate toward the second end of the pressure rod.

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

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

[0019] In the above scheme, the second end of the pressure rod is the end close to the filter cloth, and the “direction of the second end of the pressure rod” is the “direction close to the filter cloth”, that is, the “direction close to the filter cylinder”; the first end of the pressure rod is the end away from the filter cloth, and the “direction of the first end of the pressure rod” is the “direction away from the filter cloth”, that is, the “direction away from the filter cylinder”.

[0020] The present invention also provides a dewatering device, comprising a filter cylinder, wherein a cloth pushing and spreading device for stacking filter cloths in the filter cylinder and spraying materials onto the filter cloths is arranged on the top of the filter cylinder, and the cloth pressing assembly for the dewatering device is installed at the side of the filter cylinder close to the cloth pushing and spreading device; a cloth pushing head which is inclined downward and can rotate up and down is arranged at the front end of the cloth pushing and spreading device along the feeding direction, and the first end of the cloth pushing head is connected to the front end of the cloth pushing and spreading device along the feeding direction; before the cloth pushing and spreading device is fed, the pressing rod of the cloth pressing assembly presses the filter cloth against the filter cylinder; during the feeding process of the cloth pushing and spreading device, the cloth pushing head abuts against the filter cloth, and the second end of the cloth pushing head opposite to the first end rotates downward, and the distance between the bottom of the second end of the cloth pushing head and the top of the filter cylinder is greater than the distance between the top of the pressing rod and the top of the filter cylinder.

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

[0022] 1. The present invention sets the part of the pressure rod that contacts the filter cloth as a plane parallel to the top of the filter cylinder, so that when the pressure rod presses the filter cloth to the top of the filter cylinder, the filter cloth is clamped and fixed by the plane at the bottom of the pressure rod and the plane at the top of the filter cylinder. Compared with the cylindrical pressure rod in the prior art, the pressure rod in the present invention can achieve a better pressing effect and avoid the situation where the end of the filter cloth is loose.

[0023] 2. The present invention arranges a sleeve connection between the drive transmission device and the pressure rod, so that the force applied by the drive transmission device to the pressure rod can act on a certain section of the pressure rod instead of acting on a certain point on the pressure rod, and can make the pressure rod translate downward as a whole, avoiding the situation that the end of the pressure rod away from the drive transmission device is easy to tilt when the pressure rod is pressing the filter cloth, thereby improving the pressing effect on the filter cloth.

[0024] 3. The present invention sets a rotational cooperation between the cloth pushing head and the material spreading body. When the material spreading body is fed forward, the cloth pushing head can be controlled to rotate downward, so that the front end of the cloth pushing head is lower than the material spreading opening, and a height difference greater than the thickness of the material spread on the filter cloth is formed between the cloth pushing head and the material spreading opening; when the material spreading body is retreated, the cloth pushing head can be controlled to rotate upward, so that the front end of the cloth pushing head is higher than the material on the filter cloth, which can prevent the cloth pushing head from scraping the material under the material spreading body and prevent the material from sticking to the cloth pushing head, thereby improving the material paving effect and, at the same time, helping to increase the retreat speed of the material spreading body and the rate of material spreading.

[0025] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

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

[0028] Figure 2 For the embodiment of the present invention Figure 1 The enlarged view of point B in the middle;

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

[0030] Figure 4 Schematic diagram of the installation structure of the cloth pressing assembly in an embodiment of the present invention;

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

[0032] Figure 6 It is a structural schematic diagram of the first cloth pressing assembly when two connecting rods are provided in an embodiment of the present invention;

[0033] 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;

[0034] Figure 8 It is a structural schematic diagram of the case where the driving member switches to the second working state during the cloth pressing process of the first cloth pressing assembly in an embodiment of the present invention;

[0035] 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;

[0036] 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;

[0037] Fig.11 It is a cross-sectional schematic diagram of the paving body in the embodiment of the present invention;

[0038] Fig.12 For the embodiment of the present invention Fig.11 The enlarged view of point A in the middle;

[0039] Fig.13 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.14 It is a structural schematic diagram of the cloth pushing head in the second position according to the embodiment of the present invention.

[0041] Description of the main components in the figure:

[0042] 1. cloth-pushing and spreading device; 11. spreading body; 111. shell; 112. spreading pipe; 1121. spreading port; 113. cloth-pushing head; 1133. reinforcing plate; 1134. solid column; 2. filter cylinder; 4. frame; 41. cloth-guiding roller; 5. first cloth-pressing assembly; 51. pressing rod; 52. driving transmission device; 521. supporting frame; 5211. supporting frame; 522. connecting rod; 523. connecting rod Rod; 524, driving member; 5241, abutment portion; 525, elastic member; 53, power source; 54, guide assembly; 541, slide rail; 542, sleeve; 55, limiting member; 551, first limiting member; 552, second limiting member; 55-1, first plate; 55-2, second plate; 55-3, reinforcing rib; 6, second cloth pressing assembly; 7, cloth winding roller; 71, filter cloth; 8, extrusion equipment.

[0043] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] 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.

[0045] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] like Figures 1 to 14 As shown, in an embodiment of the present invention, a sludge dewatering device is introduced, including a cloth pushing and spreading device 1 and a filter cylinder 2. The cloth pushing and spreading device 1 spreads a filter cloth 71 in the filter cylinder 2 and sprays the material to be processed onto the filter cloth 71.

[0048] 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 a first side edge and a second side edge opposite to the filter cylinder 2 , and spray the material to be processed onto the filter cloth 71 .

[0050] In the moving direction of the filter cloth 71 , a first cloth pressing assembly 5 and a second cloth pressing assembly 6 are respectively provided on the first side edge and the second side edge opposite to the top of the filter cylinder 2 .

[0051] The filter cloth 71 is rolled up on the cloth winding roller 7 . The cloth winding roller 7 containing the filter cloth 71 and the cloth pushing and spreading device 1 are located on the same side of the filter cylinder 2 . The spreading opening 1121 of the cloth pushing and spreading device 1 is higher than the upper edge of the filter cylinder 2 .

[0052] One or more cloth guide rollers 41 are arranged between the cloth rolling roller 7 and the filter cylinder. After the filter cloth 71 passes around the cloth guide roller 41, the first cloth pressing assembly 5 presses the filter cloth onto the filter cylinder.

[0053] During the process of laying the filter cloth 71 from the first side to the second side of the filter cylinder 2, when the cloth pushing and spreading device 1 is outside the filter cylinder 2, the first cloth pressing assembly 5 presses the filter cloth 71 on the first side down on the filter cylinder 2; the cloth pushing and spreading device 1 moves toward the second side of the filter cylinder 2 against the filter cloth 71, and at the same time, spreads the material evenly on the filter cloth 71, and the other end of the filter cloth 71 is dragged out from the cloth winding roller 7; when reaching the second side of the filter cylinder 2, the second cloth pressing assembly 6 presses the filter cloth 71 on the second side down on the filter cylinder 2, and the cloth pushing and spreading device 1 returns to its original position.

[0054] During the retreat of the cloth pushing and spreading device 1, and / or after the cloth pushing and spreading device 1 exits the filter cylinder 2, the first cloth pressing assembly 5 is pulled out; after the cloth pushing and spreading device 1 exits the filter cylinder 2, the first cloth pressing assembly 5 is activated again to press the filter cloth 71 on the first side down on the filter cylinder 2.

[0055] By repeating the movement, several layers of the material to be processed wrapped by the filter cloth 71 are laid up and down in the filter cylinder 2 .

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

[0057] In this embodiment, the material to be processed is a mixture of solid and liquid, for example, a water-containing material, and there is no limitation on the water content.

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

[0059] In this embodiment, in order to ensure the wrapping of the material, the width of the filter cloth is set to be greater than the width of the internal space of the filter cylinder, and the width of the spreading opening of the cloth-pushing and spreading device is less than or equal to the width of the internal space of the filter cylinder. After the cloth-pushing and spreading device spreads the material on the filter cloth, the movable bottom plate of the filter cylinder moves downward, and the filter cloth carrying the material falls into the filter cylinder. The side edges of the filter cloth are bent upward under the obstruction of the filter cylinder, and the material is wrapped from both sides of the material to prevent the material from flowing out from both sides of the filter cloth.

[0060] In some preferred embodiments, there is a certain interval between the cloth pressing position of the first cloth pressing assembly and the internal space of the filter cylinder. Therefore, when the movable bottom plate of the filter cylinder moves downward, part of the filter cloth exceeding the internal space of the filter cylinder is bent upward under the obstruction of the first side of the filter cylinder, so that the side of the material close to the cloth pushing and spreading device is also wrapped by the filter cloth.

[0061] Embodiment 1

[0062] like Figures 1 to 10 As shown, in an embodiment of the present invention, a cloth pressing assembly of a dehydration device is introduced, which utilizes a power source 53 to drive the cloth pressing assembly to fix the filter cloth 71 on the side of the filter cylinder 2 close to the sludge spreading mechanism, that is, to fix the filter cloth 71 at the first side of the filter cylinder 2.

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

[0064] like Figures 4 to 10 As shown, in this embodiment, the cloth pressing assembly includes a driving transmission device 52, and a pressure rod 51 installed on the driving transmission device 52, and 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 in the horizontal direction 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.

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

[0066] The driving member 524 is slidably connected to the pressure rod 51 through the guide assembly 54, the extension direction of the guide assembly 54 is parallel to the rotation surface of the connecting rod 522, and the guide assembly 54 is set at an angle to the connecting rod 523. The moving path of the driving member 524 is parallel to the extension direction of the connecting rod 523. The driving member 524 reciprocates in the direction of approaching and moving away from the filter cloth under the drive of the power source 53. When the driving member 524 drives the pressure rod 51 to slide along the connecting rod 523, the connecting rod 522 is driven to rotate, and the connecting rod 523 slides along the pressure rod 51 to drive the pressure rod 51 to slide along the guide assembly 54.

[0067] In this embodiment, the "direction approaching and moving away from the filter cloth" is the "direction approaching and moving away from the filter cylinder". Therefore, since the guide assembly 54 and the connecting rod 523 are arranged at an angle, when the driving member 524 moves toward the direction approaching the filter cloth, 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 direction approaching the filter cloth. In the process of driving the connecting rod 522 to rotate, under the limiting and guiding action of the guide assembly 54, the connecting rod 523 drives the pressing rod 51 to move horizontally along the guide assembly 54 without rotating, so that the distance between the connecting rod 523 and the supporting frame 521 can be changed. Driven by the connecting rod 523, the pressing rod 51 presses the filter cloth 71 against the filter cylinder 2.

[0068] Through the above arrangement, a power source 53 can be used to drive the driving member 524 to move back and forth in the direction close to and away from the filter cylinder 2, so that the pressure rod 51 can be fed in the direction close to the filter cylinder 2 and pressed down, and the pressure rod 51 can be retreated and lifted in the direction away from the filter cylinder 2, thereby realizing the movement of the pressure rod 51 between the first position and the second position, reducing the power source 53 used to drive the pressure rod 51, which is beneficial to reducing the cost of the equipment and simplifying the control system of the cloth pressing assembly.

[0069] In this embodiment, by setting the connecting rod to be cylindrical, the force applied by the driving transmission device to the pressure rod can be applied to a certain section of the pressure rod instead of a certain point on the pressure rod, so that the pressure rod can be pressed down as a whole, avoiding the situation where the end of the pressure rod away from the driving transmission device is easily lifted up when the pressure rod is pressing the filter cloth, thereby improving the pressing effect on the filter cloth.

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

[0071] In this embodiment, the support frame 521 of the driving transmission device 52 can be a part of the frame 4 for supporting the cloth pushing and spreading device 1, or can be arranged on the filter cylinder 2, or can be arranged separately.

[0072] In this embodiment, with regard to the setting form of the connecting rod 523 and the support frame 521 of the driving transmission device 52, the pressure rod 51 can be set above the support frame 521, and the pressure rod 51 can also be set below the support frame 521. It is only necessary to ensure that during the rotation of the connecting rod 522 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 against the filter cylinder 2, and during the rotation of the connecting rod 522 in the direction away from the filter cylinder 2, the connecting rod 523 can drive the pressure rod 51 to lift up.

[0073] If the pressure rod 51 is arranged above the support frame 521, then, when the pressure rod 51 moves to the first position, the connecting rod 522 is inclined from bottom to top toward the filter cylinder 2. If the pressure rod 51 is arranged below the support frame 521, then, when the pressure rod 51 moves to the first position, the connecting rod 522 is inclined from bottom to top 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 pressure rod 51 above 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 clamping force of the pressure rod 51 on the filter cloth 71, thereby ensuring the clamping effect on the filter cloth 71.

[0074] In some preferred embodiments, the pressing rod 51 is arranged above the supporting frame 521 , so that the force application point of the connecting rod 523 on the pressing rod 51 can be closer to the filter cylinder 2 , further improving the pressing effect on the filter cloth 71 .

[0075] In this embodiment, regarding the location of the drive transmission device 52, the connecting rod 523 of the drive transmission device 52 can be arranged above the upper edge of the filter cylinder 2, or below the upper edge of the filter cylinder 2, and it is only necessary to ensure that the working end of the pressing rod 51 extends above the upper edge of the filter cylinder 2. The working end of the pressing rod 51 is an end of the pressing rod 51 used to press the filter cloth 71.

[0076] In some preferred embodiments, the driving transmission device 52 is arranged near the upper edge of the filter cylinder 2. Specifically, 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. Thus, the force effect of the driving transmission device 52 on the pressure rod 51 can be improved, and the structure of the sludge dewatering equipment can be made compact.

[0077] In some preferred embodiments, the pressure rod 51 is configured as a straight rod parallel to the top of the filter cylinder 2 and extending in a length direction perpendicular to the filter cloth 71. Thus, in the process of the driving member 524 moving toward the filter cylinder 2, the displacement length of the connecting rod 523 fed toward the filter cylinder 2 is increased, thereby improving the pressing effect of the pressure rod 51 on the filter cloth 71.

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

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

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

[0081] like Figures 7 to 10 As shown, in some specific embodiments, the driving member 524 is arranged at one end of the pressure rod 51 away from the filter cylinder 2, and on at least a portion of the moving path of the driving member 524 toward the filter cylinder 2, the driving member 524 abuts and slides with the side of the connecting rod 522 away from the filter cylinder 2, driving the connecting rod 522 to rotate toward the filter cylinder 2. Thus, the displacement of the pressure rod 51 in the horizontal direction and in the vertical direction can be carried out synchronously or successively.

[0082] Preferably, in the present embodiment, taking into account the cloth pressing method of the cloth pressing assembly, when pressing the cloth, the driving member 524 can be arranged to first drive the pressing rod 51 to feed in a direction close to the filter cylinder 2. After feeding a certain length, the driving member 524 abuts against the side of the connecting rod 522 away from the filter cylinder 2, and the driving member 524 continues to move in a direction close to the filter cylinder 2, driving the connecting rod 522 to rotate in a direction close to the filter cylinder 2, so that the pressing rod 51 presses the filter cloth 71 against the filter cylinder 2, thereby ensuring that the pressing rod 51 has sufficient length to press the filter cloth 71.

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

[0084] In this embodiment, the process of the driving member 524 moving toward the direction approaching the filter cloth includes a first working state and a second working state. Specifically, the first working state of the driving member 524 is that the abutment portion 5241 is spaced apart from the connecting rod; the second working state of the driving member 524 is that the abutment portion 5241 is slidingly matched with the connecting rod, driving the connecting rod to rotate toward the direction approaching the filter cloth.

[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. During the process of the driving member 524 moving toward the filter cylinder 2, 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 press 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 moving toward the filter cylinder 2 in the first working state.

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

[0087] Preferably, when the driving member is in the first working state, the connecting rod extends obliquely from bottom to top toward the filter cylinder.

[0088] In this embodiment, along the length direction of the connecting rod, the slide rail and the abutment portion 5241 are staggered, the slide rail is arranged at one end of the driving member close to the filter cylinder, and the abutment portion 5241 is arranged at one end of the driving member away from the filter cylinder.

[0089] In this embodiment, the driving member 524 is connected to the pressure rod 51 through a guide assembly 54 . The guide assembly 54 is preferably arranged in the rotation plane of the connecting rod 522 , and the extension direction of the guide assembly 54 is arranged at an angle to the connecting rod 523 .

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

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

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

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

[0094] In some specific embodiments, the support frame 521 is provided with a support frame 5211 that protrudes in a direction close to the connecting rod 523 and extends in a direction parallel to the connecting rod 523. The driving member 524 is slidably arranged on the support frame 5211, and the support frame 5211 supports and guides the driving member 524.

[0095] In some possible embodiments, the connecting rod is arranged above the support frame, and the vertical distance between the end of the pressing rod close to the filter cylinder and the top of the filter cylinder is less than or equal to the vertical distance between the end of the pressing rod away from the filter cylinder and the top of the support frame. Thus, it can be ensured that the connecting rod can drive the pressing rod to press the filter cloth on the filter cylinder.

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

[0097] In this embodiment, when the pressure rod is in the first position, the connecting rod and the supporting frame are offset from each other in the length direction of the pressure rod to avoid mutual interference.

[0098] Preferably, the connecting rod 522 includes a first rod portion and a second rod portion clamped on both sides of the connecting rod 523, and the supporting frame 5211 at least partially extends between the first rod portion and the second rod portion.

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

[0100] In some specific embodiments, the upper ends of the first rod portion and the second rod portion of the connecting rod 522 are respectively hinged to the left and right sides of the connecting rod 523, and the lower ends of the first 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 connecting rod 523. The driving member 524 is arranged at the top of the support frame 5211 and slides with the top of the support frame 5211.

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

[0102] Preferably, in this embodiment, the surface of the driving member 524 for contacting with the connecting rod 522 is configured as an arc-shaped surface.

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

[0104] The connecting rod 522 can be provided as one or a group, or can be provided as a plurality of connecting rods 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 of connecting rods or a plurality of groups, each connecting rod 522 is of equal length and parallel to each other.

[0105] Specifically, the connecting rod 522 is provided with a plurality of connecting rods 522 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 with 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.

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

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

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

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

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

[0111] In this embodiment, the elastic member 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, and it only needs to be able to drive the connecting rod 522 to rotate away from the filter cylinder 2.

[0112] like Figure 5 and Figure 6 As shown, in some specific embodiments, the elastic member 525 is configured as a spring-type telescopic rod, and the spring-type telescopic rod 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.

[0113] When the driving member 524 drives the connecting rod 522 to rotate toward the filter cylinder 2, the spring-type telescopic rod contracts, and the spring inside the spring-type telescopic rod accumulates force. When the driving member 524 moves away from the filter cylinder 2, the spring-type telescopic rod extends, driving the connecting rod 522 to reset. During this process, the connecting rod 523 drives the pressure rod 51 to move upward.

[0114] Preferably, in some possible embodiments, the cloth pressing assembly is arranged at a first side edge of the filter cylinder 2 close to the cloth pushing and spreading device 1 .

[0115] Before the cloth-pushing and spreading device 1 is fed from the first side of the filter cylinder 2 to the second side away from the cloth-pushing and spreading device 1, the cloth-pressing assembly presses the filter cloth 71 against the filter cylinder 2. 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 moves in the direction 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 being drawn out of the filter cloth 71.

[0116] Specifically, Figures 7 to 10 As shown, 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 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 elastic member 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 elastic member 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, thereby ensuring the flatness of the material on the filter cloth 71.

[0117] In this embodiment, before the cloth pushing head 113 of the cloth pushing and spreading device 1 moves to the first side edge, the pressing rod 51 can be completely pulled out from both sides of the cloth pushing and spreading device 1 .

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

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

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

[0121] The connecting rod 523 is configured to be cylindrical, and the pressure rod 51 is configured to be a straight rod extending in the horizontal direction and parallel to the connecting rod 523. The shape of the radial cross section of the pressure rod 51 is the same as the inner peripheral shape of the radial cross section of the connecting rod 523. The length of the pressure rod 51 is greater than the length of the connecting rod 523. The pressure rod 51 penetrates the connecting rod 523 from the end of the connecting rod 523 away from the filter cylinder 2. The end of the pressure rod 51 away from the filter cylinder 2 is provided with a sliding sleeve 542 extending in the vertical direction.

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

[0123] The elastic member 525 is arranged at one end of the parallelogram transmission mechanism close to the filter cylinder 2 and is a spring-type telescopic rod, one end of which is hinged to the connecting rod 522 close to the filter cylinder 2 and the other end is hinged to the support frame 521 .

[0124] When the pressing rod 51 is at the second position, the driving member 524 is spaced apart from the connecting rod 522 , and the driving member 524 first drives the pressing rod 51 to move along the connecting rod 523 toward the filter cylinder 2 .

[0125] When the driving member 524 moves to abut against the connecting rod, the driving member 524 continues to move in the direction close to the filter cylinder 2, driving the connecting rod 522 to rotate in the direction close to the filter cylinder 2, so that the connecting rod 523 drives the pressing rod 51 to slide downward along the slide rail 541. Preferably, when the driving member 524 moves to abut against the connecting rod, the sliding sleeve 542 is spaced from the end of the connecting rod 523 away from the filter cylinder 2. When the power source 53 drives the driving member 524 to move in the direction away from the filter cylinder 2, the elastic member 525 drives the connecting rod 522 to rotate in the direction away from the filter cylinder 2, and lifts the pressing rod 51 to a certain height, and then the driving member 524 continues to move in the direction away from the filter cylinder 2. After the pressing rod 51 is completely pulled out from the side of the filter cloth 71, the elastic member 525 drives the connecting rod 522 to continue to rotate, and moves the pressing rod 51 to the second position.

[0126] In the present embodiment, “raising the pressure rod 51 to a certain height” specifically refers to raising the pressure rod 51 until the top of the pressure rod 51 abuts against the bottom of the cloth pushing and spreading device 1 .

[0127] Preferably, in this embodiment, the connecting rod 523 is arranged above the supporting frame 521, and when the driving member 524 is in the initial position, the connecting rod 522 extends obliquely from bottom to top toward the direction close to the filter cylinder 2, and the spring-type telescopic rod extends obliquely from bottom to top toward the direction away from the filter cylinder 2. Thus, the smoothness of the driving member 524 driving the connecting rod 522 to rotate toward the side close to the filter cylinder 2 can be further improved.

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

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

[0130] In this embodiment, the filter cylinder 2 includes a third side and a fourth side perpendicular to the first side and the second side, the cloth pressing assembly 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.

[0131] Preferably, two cloth pressing assemblies are provided, which are respectively arranged at the third side and the fourth side, so as to press the filter cloth 71 from both sides of the filter cloth 71 .

[0132] Embodiment 2

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

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

[0135] Specifically, Figures 4 to 10 As shown, the cloth pressing assembly includes a pressing rod 51 for pressing the filter cloth 71, and the length direction of the pressing rod 51 is set at an angle with the laying direction of the filter cloth 71, and the "laying direction of the filter cloth 71" is the "length direction of the filter cloth 71". At least the part of the pressing rod 51 extending in the horizontal direction that is used to abut against the filter cloth 71 is set as a plane parallel to the top of the filter cylinder 2.

[0136] In some specific embodiments, the pressure rod 51 extends horizontally in a direction perpendicular to the length of the filter cloth 71, and the vertical cross-section of the pressure rod 51 for contacting the filter cloth 71 is close to the filter cylinder 2 and is a straight line parallel to the top of the filter cylinder 2 and extending along the length of the filter cloth 71.

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

[0138] In this embodiment, the side of the vertical cross section at the abutment point between the pressure rod 51 and the filter cloth 71 away from the filter cloth 71 can be a straight line, a curve, or a broken line.

[0139] In some preferred embodiments, the vertical cross-section of the pressure rod 51 at the location where the pressure rod 51 contacts the filter cloth 71 is configured to be rectangular, arched or trapezoidal.

[0140] In some preferred embodiments, the width of the vertical cross section of the pressure rod 51 at the location where the pressure rod 51 contacts the filter cloth 71 along the vertical direction is less than or equal to the width along the horizontal direction.

[0141] Preferably, the vertical cross-section of the pressure rod 51 for contacting the filter cloth 71 has a width in the vertical direction that is smaller than the width in the horizontal direction, that is, the pressure rod 51 for contacting the filter cloth 71 is set to be flat, so that, in the process of pushing the cloth and spreading the material, on the one hand, the pressure rod 51 can have a better fixing effect on the filter cloth 71, and on the other hand, the filter cloth 71 under the spreading body 11 of the cloth pushing and spreading device 1 can be closer to the filter cylinder 2, and after the material is sprayed on the filter cloth 71, the filter cylinder 2 can be used for support, thereby reducing the flow of the material on the filter cloth 71 and improving the uniformity of the material.

[0142] In some possible embodiments, anti-skid patterns are provided on the plane of the pressure rod 51 for contacting the filter cloth 71, and / or anti-skid patterns are provided on the top of the filter cylinder 2 corresponding to the pressure rod 51. Thus, relative sliding between the filter cloth 71, the filter cylinder 2 and the pressure rod 51 can be avoided during the process of pushing the cloth and spreading the material, and the fixing effect of the filter cloth 71 is further improved.

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

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

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

[0146] By arranging the drive transmission device 52 and the pressure rod 51 to be nested, the force applied by the drive 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 pressed downward as a whole, thereby preventing the end of the pressure rod 51 away from the drive transmission device 52 from easily tilting up when the pressure rod 51 presses the filter cloth 71, thereby improving the pressing effect on the filter cloth 71.

[0147] In this embodiment, the driving transmission device 52 can be any driving transmission device in the prior art, and the driving transmission device 52 can also be any one of the above-mentioned embodiment 1, including a connecting rod 523, and the connecting rod 523 is sleeved with the pressure rod 51.

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

[0149] In some possible embodiments, a track extending along the length direction of the pressure rod 51 may be provided on the connecting rod 523 , and at least a portion of one end of the pressure rod 51 away from the filter cylinder 2 is configured as a hollow structure and sleeved on the track.

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

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

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

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

[0154] The transmission mechanism includes a connecting rod 523 and a connecting rod 522 hinged to the connecting rod 523. The connecting rod 522 includes at least two groups of equal lengths arranged at intervals along the length direction of the connecting rod 523 to form a parallelogram structure. The driving member 524 is arranged at one end of the transmission mechanism of the parallelogram structure away from the filter cylinder 2, and reciprocates in a direction parallel to the connecting rod 523. It is respectively connected to the pressure rod 51 and the connecting rod 522, so as to drive the connecting rod 522 to rotate during the process of driving the pressure rod 51 to slide along the connecting rod 523.

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

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

[0157] In some preferred embodiments, an elastic member 525 for driving the connecting rod 522 to rotate toward a side away from the filter cylinder 2 is provided between at least one connecting rod 522 and the supporting frame 521 of the parallelogram-structured transmission mechanism.

[0158] When the driving member 524 drives the connecting rod 522 to rotate toward the filter cylinder 2, the elastic member 525 accumulates force. When the driving member 524 moves away from the filter cylinder 2, the elastic force of the elastic member 525 is released, driving the connecting rod 522 to reset. During this process, the connecting rod 523 drives the pressure rod 51 to move upward.

[0159] Preferably, in the present embodiment, in the process that the driving member 524 drives the pressure rod 51 to slide in the direction close to the filter cylinder 2, it includes a first working state and a second working state. Specifically, the first working state of the driving member 524 is that the abutment portion 5241 and the connecting rod 522 are spaced apart; the second working state of the driving member 524 is that the abutment portion 5241 and the connecting rod 522 are slidingly matched, driving the connecting rod 522 to rotate in the direction close to the filter cloth 71.

[0160] 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 pressure rod 51 to feed toward the filter cylinder 2. During the process of the driving member 524 moving toward the filter cylinder 2, when it is in the second working state, the driving member 524 not only drives the pressure 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 pressure rod 51 to be pressed downward through the connecting rod 523. During this process, the elastic member 525 accumulates force.

[0161] Preferably, in this embodiment, when the driving member 524 is in the first working state, the horizontal distance between the sliding sleeve 542 and the end of the connecting rod 523 away from the filter cylinder 2 is greater than or equal to the horizontal distance between the abutting portion 5241 and the connecting rod 522. Therefore, when the driving member 524 moves toward the filter cylinder 2, the abutting portion 5241 can smoothly abut against the connecting rod 522, and the connecting rod 522 is driven to rotate by the abutting portion 5241, rather than the sliding sleeve 542 on the pressure rod 51 pushing the connecting rod 523 to rotate the connecting rod 522, so that the smoothness of the sliding of the pressure rod 51 along the slide rail 541 can be ensured.

[0162] Preferably, in this embodiment, when the driving member 524 is in the first working state, the connecting rod 522 extends obliquely from bottom to top toward the direction close to the filter cylinder 2; along the length direction of the connecting rod 523, the slide rail 541 and the abutting portion 5241 are staggered, the slide rail 541 is arranged at the end of the driving member 524 close to the filter cylinder 2, and the abutting portion 5241 is arranged at the end of the driving member 524 away from the filter cylinder 2. Therefore, before the abutting portion 5241 abuts against the connecting rod 522, that is, when the driving member 524 is in the first working state, the pressing rod 51 can obtain a larger feeding distance toward the side close to the filter cylinder 2, and then be pressed down under the drive of the transmission mechanism of the parallelogram structure.

[0163] Preferably, in this embodiment, when the pressure rod 51 is in the first position, the angle between the connecting rod 522 and the horizontal direction is less than or equal to 45°, so that the transmission mechanism of the parallelogram structure 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.

[0164] In this embodiment, the connecting rod 523 is arranged above the support frame 521, and the support frame 521 is provided with a support frame 5211 protruding in the direction close to the connecting rod 523 and extending in a direction parallel to the connecting rod 523, and the vertical distance between the end of the pressing 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 pressing rod 51 away from the filter cylinder 2 and the top of the support frame 5211. Therefore, it can be ensured that the connecting rod 523 can drive the pressing rod 51 to press the filter cloth 71 on the filter cylinder 2.

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

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

[0167] In this embodiment, when the pressing rod 51 is in the first position, the connecting rod 523 and the supporting frame 5211 are offset from each other in the length direction of the pressing rod 51 to avoid mutual interference.

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

[0169] Embodiment 3

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

[0171] In this embodiment, based on the first or second embodiment, the structure of the first cloth pressing assembly is further limited.

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

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

[0174] like Figure 4As shown, in some preferred embodiments, the limiting member 55 includes a first limiting member 551 and a second limiting member 552, the first limiting member 551 is 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.

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

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

[0177] In some specific embodiments, the limiting member 55 includes a first plate 55-1 and a second plate 55-2, the first plate 55-1 is perpendicular to the laying direction of the filter cloth 71, the first plate 55-1 is in contact with the pressure rod 51 on one side facing the pressure rod 51, the second plate 55-2 is arranged at any one end of the first plate 55-1 or at both ends of the first plate 55-1, and extends in a direction away from the pressure rod 51, and a reinforcing rib 55-3 is arranged between the first plate 55-1 and the second plate 55-2, thereby improving the supporting strength of the limiting member 55 and further improving the stability of limiting the pressure rod 51.

[0178] like Figures 4 to 10 As shown, in some specific embodiments, the first plates 55-1 of the first limiting member 551 and the second limiting member 552 extend 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 a direction away from each other.

[0179] The reinforcing rib 55-3 is perpendicular to the first plate 55-1 and the second plate 55-2, and extends vertically upward from the top of the second plate 55-2. 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 side of the reinforcing rib 55-3 away from the first plate 55-1 is inclined from bottom to top toward the direction close to the first plate 55-1.

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

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

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

[0183] In some specific embodiments, during the movement of the pressing rod 51 between the first position and the second position, the pressing rod 51 always maintains at least partial contact with the limiting member 55. Specifically, the first plates 55-1 of the first limiting member 551 and the second limiting member 552 extend vertically upward and are higher than the filter cylinder 2 by a certain height, and the certain height enables the first plate 55-1 to at least partially overlap with the pressing rod 51 in the vertical direction when the pressing rod 51 is in the second position. When the pressing rod 51 is in the second position, the first plates 55-1 of the first limiting member 551 and the second limiting member 552 at least partially overlap in the length direction of the pressing rod 51.

[0184] Preferably, when the pressing rod 51 is in the second position, the end of the pressing rod 51 close to the filter cylinder 2 is flush with the outer edge of the top of the filter cylinder 2. Preferably, in this embodiment, the lower ends of the first plates 55-1 of the first limiting members 551 and the second limiting members 552 are lower than the upper edge of the filter cylinder 2.

[0185] In this embodiment, a driving transmission device 52 for driving the pressure rod 51 to move between the first position and the second position is provided on the side of the limiting member 55 away from the filter cylinder 2. The driving transmission device 52 can be any driving transmission device in the prior art, and the driving transmission device 52 can also be the driving transmission device 52 in the above-mentioned embodiment 1. In some preferred embodiments, the first limiting member 551 and the second limiting member 552 are provided as an integral part with the support frame 521.

[0186] Embodiment 4

[0187] like Figures 1 to 14 As shown, a cloth pushing and spreading device 1 of the sludge dewatering equipment described in embodiment 1 is introduced.

[0188] like Figures 1 to 3 , Figures 11 to 14 As shown, in this embodiment, the cloth pushing and spreading device 1 includes a spreading body 11, and a spreading opening 1121 is provided at the bottom of the spreading body 11. A cloth pushing head 113 extending downwardly and obliquely is provided at the front end of the spreading body 11, and a first end of the cloth pushing head 113 is connected to the spreading body 11, and a 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.

[0189] In the above scheme, the front end of the material-laying body 11 is specifically the end of the material-laying body 11 facing the filter cylinder 2, that is, the end that abuts against the filter cloth 71 during the feeding process of the material-laying body 11. During the feeding process of the material-laying body 11, the cloth pushing head 113 at the front end of the material-laying body 11 supports the filter cloth 71, so that the filter cloth 71 is dragged out from the cloth winding roller 7.

[0190] like Figure 1 and Figure 2 As shown, the cloth pushing head 113 at the front end of the material spreading body 11 presses against the filter cloth 71 so that the filter cloth 71 is pulled out from the cloth winding roller 7, and the filter cloth is wrapped around the front end of the material spreading body 11, and the filter cloth slides along the front end of the material spreading body 11 during the process of the material spreading body 11 being fed forward.

[0191] By arranging a cloth pushing head 113 which extends downwardly and obliquely at the front end of the material spreading body 11, arranging the material spreading opening 1121 at the bottom of the material spreading body 11 behind the cloth pushing head 113, and arranging the second end of the cloth pushing head 113 to be lower than the material spreading opening 1121 when the cloth pushing head 113 abuts against the filter cloth 71, the cloth pushing head 113 can drag the filter cloth 71 off the cloth winding roller 7 during the feeding and material spreading process of the material spreading body 11, and the filter cloth 71 under the material spreading body 11 can be stretched flat by the reaction force, and the material can be spread on the cloth spreading body 11 at the same time. On the filter cloth 71 below the paving body 11, on the one hand, the laying effect of the filter cloth 71 can be guaranteed, and on the other hand, the height difference between the second end of the cloth pushing head 113 and the paving port 1121 can reserve space for laying materials between the filter cloth 71 below the paving body 11 and the paving port 1121, which can avoid the material from sticking to the paving body 11 and improve the sludge spreading effect, so that the material can be evenly spread between two adjacent layers of filter cloth 71, which is beneficial to improving the dehydration effect of the material.

[0192] Preferably, in this embodiment, at least when the cloth pushing head 113 abuts against the filter cloth 71, the height difference between the second end of the cloth pushing head 113 and the material spreading opening 1121 is greater than the thickness of the material spread on the filter cloth, thereby further preventing the material from sticking to the material spreading body 11.

[0193] In some specific embodiments, the cloth pushing head 113 extends downwardly from the front end of the material spreading body 11, and the thickness of the cloth pushing head 113 in the direction perpendicular to the first end to the second end gradually decreases from the first end to the second end of the cloth pushing head 113. Specifically, the thickness of the cloth pushing head 113 gradually decreases in the direction away from the material spreading body 11.

[0194] Through the above-mentioned arrangement, when the cloth pushing head 113 of the material spreading body 11 pushes against the filter cloth 71 and feeds forward, and the filter cloth 71 is dragged out from the cloth winding roller 7, the filter cloth 71 slides smoothly along the cloth pushing head 113, thereby reducing the resistance of the cloth pushing head 113 to the filter cloth 71. At the same time, it can avoid that the filter cloth 71 has excessive surplus at the second side of the filter cylinder 2, and can make the filter cloth 71 above the material flat after the material spreading body 11 is retreated.

[0195] Preferably, in this embodiment, the second end of the cloth pushing head 113 is configured to be arc-shaped, thereby further improving the smoothness of the filter cloth 71 sliding along the second end of the cloth pushing head 113 and preventing the cloth pushing head 113 from damaging the filter cloth 71 during the cloth pushing process.

[0196] Preferably, in a direction perpendicular to the first end to the second end of the cloth pushing head 113 , the maximum thickness of the arc shape at the second end of the cloth pushing head 113 is smaller than the thickness of the first end of the cloth pushing head 113 .

[0197] In this embodiment, the cloth pushing head 113 can be set as a solid structure or a hollow structure.

[0198] In some specific embodiments, the second end of the cloth pushing head 113 is a solid cylinder 1134 whose diameter is smaller than the thickness of the front end of the material spreading body 11. The solid cylinder 1134 is connected to the material spreading body 11 through a support plate extending downward from the front end of the material spreading body 11. The end of the support plate away from the solid cylinder 1134 is the first end of the cloth pushing head 113.

[0199] Specifically, the solid column 1134 is disposed in front of the material paving body 11, is spaced apart from the material paving body 11, and is connected to the front end of the material paving body 11 through the support plate.

[0200] In this embodiment, the solid cylinder 1134 constitutes the second end of the cloth pushing head 113, which can prevent the second end of the cloth pushing head from being deformed and increase the service life of the device.

[0201] In some possible embodiments, a support plate extends obliquely from the upper side of the solid column 1134 along the tangent direction of the solid body toward the upper edge of the front end of the paving body 11, and the end of the support plate is smoothly transitioned to the outer peripheral wall of the solid column 1134.

[0202] In other possible embodiments, the two support plates extend obliquely from the upper and lower sides of the solid column 1134 along the tangent direction of the solid body toward the upper and lower edges of the front end of the paving body 11; the ends of the support plates are smoothly transitionally connected to the outer peripheral wall of the solid column 1134.

[0203] Preferably, the diameter of the solid cylinder 1134 is smaller than the thickness of the front end of the material laying body 11; the support plate includes two, which extend obliquely from the outer peripheral wall of the solid cylinder 1134 to the upper and lower edges of the front end of the material laying body 11, respectively, and the end of the support plate away from the solid body constitutes the first end of the cloth pushing head. One end of the support plate is connected to the solid cylinder 1134 as a whole, and the other end is connected to the front end of the material laying body 11, and the end of the support plate is smoothly connected to the outer peripheral wall of the solid cylinder 1134, so that the second end of the cloth pushing head 113 forms a smooth surface to avoid scratching the filter cloth 71 during the cloth pushing process.

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

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

[0206] like Fig.12 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.

[0207] In this embodiment, the cloth pushing head 113 and the material spreading body 11 can be connected as one body, or the cloth pushing head 113 and the material spreading body 11 can be arranged to rotate together.

[0208] Preferably, in this embodiment, at least the end of the support plate connected to the solid column 1134 from above the solid column 1134 away from the solid column 1134 is smoothly transitionally connected to the paving body 11 .

[0209] Preferably, in this embodiment, the shape of one end of the cloth pushing head 113 connected to the material spreading body 11 is adapted to the shape of the front end of the material spreading body 11 .

[0210] In some possible embodiments, the cloth pushing head 113 is connected as a whole with the material spreading body 11. Specifically, one end of the two support plates of the cloth pushing head 113 away from the solid cylinder 1134 is respectively connected to the upper and lower edges of the front end of the material spreading body 11, and the second end of the cloth pushing head 113 is lower than the material spreading opening 1121.

[0211] In this embodiment, in order to prevent the cloth-pushing head 113 from scraping the material under the material-paving body 11, the material-paving body 11 can be controlled to rise when the material-paving body 11 retreats, or the cloth-pushing and material-paving device can be controlled to rise as a whole, or the movable bottom plate of the filter cylinder can be controlled to move downward, so that the cloth-pushing head 113 can avoid the material laid on the filter cloth. In some preferred embodiments, the movable bottom plate is initially moved to a position slightly lower than the top of the filter cylinder 2, and the interval between the movable bottom plate and the top of the filter cylinder 2 is greater than or equal to the thickness of the material laid on the filter cloth 71; when the front end of the cloth-pushing and material-paving device 1 moves to the outside of the first side along the feeding direction, the movable bottom plate of the filter cylinder 2 moves downward by a stroke that matches the thickness of the material laid on the filter cloth 71 and the sum of the thickness of the filter cloth 71.

[0212] Specifically, in this embodiment, the filter cylinder includes a cylinder body and a movable bottom plate located inside the cylinder body. The cylinder body is a hollow cubic structure with water outlet holes on the sides. The top of the cylinder body is open, the movable bottom plate matches the cross-section of the cylinder body cavity and can move up and down along the cylinder body, and the bottom of the cylinder body is open.

[0213] like Fig.13 and Fig.14 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.

[0214] Preferably, in this embodiment, the cloth pushing head 113 includes a first position for rotating upward to an upper limit, and a second position for rotating downward to a lower limit. When the cloth pushing head 113 is in the first position and the second position, the height difference of the second end of the cloth pushing head 113 is greater than the thickness of the material laid on the filter cloth.

[0215] In this embodiment, a structure for driving the cloth pushing head 113 to rotate between the first position and the second position may be provided between the cloth pushing head 113 and the material spreading body 11 .

[0216] In this embodiment, the cloth pushing head 113 can be driven by a separate small motor.

[0217] Preferably, in this embodiment, an elastic member is provided between the cloth pushing head 113 and the material spreading body 11, and the elastic member is used to drive the cloth pushing head 113 to rotate toward the first position. During the forward feeding of the material spreading body 11, the reaction force applied by the filter cloth 71 to the cloth pushing head 113 is greater than the elastic force of the elastic member, and the cloth pushing head 113 rotates toward the second position under the driving force of the reaction force of the filter cloth 71. Thus, the cloth pushing head 113 can be automatically switched between the first position and the second position, and can match the cloth pushing and material spreading action of the material spreading body 11.

[0218] Specifically, in this embodiment, when the cloth pushing head 113 rotates to the first position, the height of the axis of the solid cylinder 1134 is lower than the height of the rotation center of the cloth pushing head 113, thereby ensuring that the cloth pushing head 113 can smoothly rotate to the second position under the reaction force of the filter cloth 71.

[0219] In some possible embodiments, a limiting structure for limiting the upper limit position of the upward rotation of the cloth pushing head 113 and the lower limit position of the downward rotation of the cloth pushing head 113 is provided between the cloth pushing head 113 and the material spreading body 11 .

[0220] In some specific embodiments, the cloth pushing head 113 is installed at the front end of the material spreading body 11 through a rotating shaft, and the axis of the rotating shaft extends laterally in a direction perpendicular to the feeding direction of the material spreading body 11, and the limiting structure includes a first limiting structure for limiting the upper limit position of the upward rotation of the cloth pushing head 113, and the first limiting structure limits the cloth pushing head 113 to the first position, and a second limiting structure for limiting the lower limit position of the downward rotation of the cloth pushing head 113, and the second limiting structure limits the cloth pushing head 113 to the second position.

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

[0222] like Fig.13 and Fig.14As shown, in some other possible embodiments, the front end surface of the material laying body 11 can be limited by the rotation of the cloth pushing head 113. Specifically, the rotating shaft can be set between the middle part of the front end surface of the material laying body 11 and the cloth pushing head 113, and a gap for the cloth pushing head 113 to rotate is set between the cloth pushing head 113 and the material laying body 11. When the cloth pushing head 113 rotates to the first position, the upper end of the cloth pushing head 113 on the side close to the material laying body 11 abuts against the front end of the material laying body 11, and when the cloth pushing head 113 rotates to the second position, the lower end of the cloth pushing head 113 on the side close to the material laying body 11 abuts against the front end of the material laying body 11.

[0223] Preferably, in this embodiment, the upper edge of the front end of the material spreading body 11 and / or the upper edge of the first end of the cloth pushing head are provided with arc-shaped chamfers to avoid scratching the filter cloth.

[0224] In this embodiment, the elastic member used to drive the cloth pushing head 113 to rotate toward the first position may be a torsion spring.

[0225] Preferably, in this embodiment, the top of the working end of the first cloth pressing assembly 5 is substantially flush with the bottom of the second end of the cloth pushing head 113, so that the filter cloth 71 below the material spreading body 11 can be substantially level.

[0226] Specifically, when the working end of the first cloth pressing assembly 5 presses the filter cloth 71 on the first side of the filter cylinder 2 onto the filter cylinder 2, the top of the working end of the first cloth pressing assembly 5 is slightly lower than the bottom of the second end of the cloth pushing head 113, allowing the cloth pushing head 113 to pass smoothly.

[0227] Preferably, in this embodiment, the height difference between the bottom of the second end of the cloth pushing head 113 and the top of the working end of the first cloth pressing assembly 5 is greater than or equal to the thickness of the filter cloth 71 .

[0228] Preferably, in this embodiment, the material spreading opening 1121 is arranged at the bottom of the material spreading body 11, close to the front end of the material spreading body 11, that is, the material spreading opening 1121 is arranged close to the cloth pushing head 113, so that the material can be spread all over the filter cloth 71 below, making the structure compact.

[0229] In this embodiment, a sludge dewatering device is also provided, which includes a filter cylinder 2 and the above-mentioned cloth pushing and spreading device 1 installed on one side of the top of the filter cylinder 2. The spreading body 11 of the cloth pushing and spreading device 1 reciprocates above the filter cylinder 2, laying the filter cloth 71 in layers in the filter cylinder 2 and spraying material onto the filter cloth 71.

[0230] Specifically, the material spreading body 11 sprays the material onto the filter cloth 71 during the feeding process, and stops spraying the material onto the filter cloth 71 during the retreat process.

[0231] 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.

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

[0233] Preferably, in the present embodiment, a notch is provided in the middle portion of the second end of the cloth pushing head 113, which is adapted to the shape of the working end of the second cloth pressing assembly arranged on the side of the filter cylinder 2 away from the cloth pushing and spreading device, so that the working end of the second cloth pressing assembly can pass through to press the filter cloth 71 covered on the second end of the cloth pushing head 113 onto the filter cylinder 2.

[0234] Specifically, the notch 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 faces the direction away from the first end of the cloth pushing head 113; preferably, a second cloth pressing assembly is arranged on the side of the filter cylinder 2 away from the cloth pushing and spreading device; along the horizontal direction perpendicular to the first end to the second end of the cloth pushing head 113, the width of the working end of the second cloth pressing assembly is smaller than the width of the notch; the working end of the second cloth pressing assembly passes through the notch from top to bottom, and presses the filter cloth 71 covered on the second end of the cloth pushing head 113 onto the filter cylinder 2.

[0235] In this embodiment, when the material spreading body reaches the second side of the filter cylinder 2, that is, when the cloth pushing head 113 reaches the second side of the filter cylinder 2, the working end of the second cloth pressing assembly 6 passes through the notch from top to bottom and presses the bent part of the filter cloth against the filter cylinder.

[0236] By setting, the thickness of the cloth pushing head 113 in the direction perpendicular to the first end to the second end gradually decreases from the first end to the second end, which can facilitate the working end of the second cloth pressing assembly 6 to pass through the notch, press the filter cloth, and improve the smoothness of the cloth pressing.

[0237] In this embodiment, a material laying pipe 112 is arranged in the shell 111 of the material laying body 11, and the material laying pipe 112 includes a diameter-reducing section and an output section each having a channel, and a material laying port 1121 is arranged at the second end of the output section, and the second end of the diameter-reducing section is connected to the first end of the output section, so that the diameter-reducing section channel is connected to the output section channel;

[0238] The channels of the output section have the same cross section perpendicular to the forward direction of the material, and the bottom surface of the output section that carries the material is a plane; the cross-sectional area of ​​the channel of the variable diameter section at the second end is less than or equal to the cross-sectional area at the first end, and the vertical cross section of the channel of the output section is the same as the vertical cross section of the channel of the variable diameter section at the second end;

[0239] Among them, in the horizontal direction perpendicular to the material flow direction, the width of the second end of the variable diameter section channel is greater than the width of the first end; in the vertical direction perpendicular to the material flow direction, the height of the second end of the variable diameter section channel is less than the height of the first end.

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

[0241] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the present invention can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents suggested above without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A cloth pressing assembly for a dewatering device, comprising a pressing rod (51) for pressing a filter cloth (71) against the top of a filter cylinder (2); It is characterized in that At least the portion of the pressure rod (51) extending in the horizontal direction that contacts the filter cloth (71) is arranged to be a plane parallel to the top of the filter cylinder (2).

2. The cloth pressing assembly for dehydration equipment according to claim 1, characterized in that: The pressure rod (51) extends horizontally in a length direction perpendicular to the filter cloth (71); the vertical cross section of the pressure rod (51) used for contacting the filter cloth (71) is set to be rectangular, arched or trapezoidal.

3. The cloth pressing assembly for dehydration equipment according to claim 2, characterized in that: The vertical cross section of the pressure rod (51) for contacting the filter cloth (71) has a width in the vertical direction that is less than or equal to the width in the horizontal direction; Preferably, the plane of the pressure rod for contacting with the filter cloth is provided with anti-slip grooves; Preferably, anti-slip grooves are provided at the top of the filter cylinder corresponding to the pressure rod.

4. The cloth pressing assembly for a dehydration device according to any one of claims 1 to 3, characterized in that: When the pressure rod (51) is in the first position, the filter cloth (71) is pressed tightly against the top of the filter cylinder (2); when the pressure rod (51) is in the second position, the projection of the pressure rod (51) in the horizontal direction falls outside the filter cloth (71); A driving transmission device (52) for driving the pressure rod (51) to move between a first position and a second position is sleeved with the pressure rod (51).

5. The cloth pressing assembly for dehydration equipment according to claim 4, characterized in that: The drive transmission device (52) comprises: The transmission mechanism comprises a connecting rod (523) and a connecting rod (522) hinged to the connecting rod (523); the connecting rod (522) comprises at least two groups of equal lengths arranged at intervals along the length direction of the connecting rod (523) to form a parallelogram structure; the connecting rod (523) is sleeved on the pressure rod (51), or the pressure rod (51) is sleeved on the connecting rod (523); the connecting rod (523) is slidable along the length direction of the pressure rod (51), and the length of the connecting rod (523) is less than the length of the pressure rod (51); The driving member (524) is arranged at one end of the transmission mechanism of the parallelogram structure, reciprocates in a direction parallel to the connecting rod (523), and is respectively connected to the pressure rod (51) and the connecting rod (522) in a transmission manner, so as to drive the connecting rod (522) to rotate while the pressure rod (51) slides along the connecting rod (523); Preferably, the connecting rod is cylindrical, is sleeved in the middle of the pressure rod, and is slidable along the length direction of the pressure rod. The length of the connecting rod is smaller than the length of the pressure rod.

6. The cloth pressing assembly for dehydration equipment according to claim 5, characterized in that: The driving member (524) comprises: The slide rail (541) extends in a direction perpendicular to the pressure rod (51), and a slide sleeve (542) is provided at the first end of the pressure rod (51), and the slide sleeve (542) is sleeved on the slide rail (541); The abutment portion (5241) corresponds to a side of the connecting rod (522) away from the second end of the pressing rod (51); When the driving member (524) drives the pressure rod (51) to slide in the direction of the second end of the pressure rod (51), the abutment portion (5241) slides with the side of the connecting rod (522) away from the second end of the pressure rod (51), drives the connecting rod (522) to rotate in the direction of the second end of the pressure rod (51), and drives the pressure rod (51) to slide along the slide rail (541) through the connecting rod (523); Preferably, an elastic member (525) for driving the connecting rod (522) to rotate toward the first end of the pressure rod (51) is provided between at least one connecting rod (522) and the supporting frame (521) of the parallelogram-structured transmission mechanism; Preferably, when the pressure rod is in the first position, the angle between the connecting rod and the horizontal direction is less than or equal to 45°.

7. The cloth pressing assembly for dehydration equipment according to claim 6, characterized in that: The driving member (524) is arranged on a side of the transmission mechanism of the parallelogram structure away from the second end of the pressure rod (51); during the process in which the driving member (524) drives the pressure rod (51) to slide in the direction of the second end of the pressure rod (51): In the first working state, the abutting portion (5241) is spaced apart from the connecting rod (522); In the second working state, the abutment portion (5241) slides and cooperates with the side of the connecting rod (522) away from the second end of the pressure rod (51), driving the connecting rod (522) to rotate in the direction of the second end of the pressure rod (51).

8. The cloth pressing assembly for dehydration equipment according to claim 7, characterized in that: When the driving member (524) is in the first working state, the horizontal distance between the sliding sleeve (542) and the connecting rod (523) is greater than or equal to the horizontal distance between the abutting portion (5241) and the connecting rod (522); Along the length direction of the connecting rod (523), the slide rail (541) and the abutment portion (5241) are staggered, the slide rail (541) is arranged at one end of the driving member (524) close to the pressure rod (51), and the abutment portion (5241) is arranged at one end of the driving member (524) away from the pressure rod (51); Preferably, when the driving member is in the first working state, the connecting rod extends obliquely from bottom to top toward the second end of the pressure rod.

9. The cloth pressing assembly for dehydration equipment according to claim 6, characterized in that: The connecting rod (523) is arranged above the support frame (521), and the support frame (521) is provided with a support frame (5211) which protrudes in a direction close to the connecting rod (523) and extends in a direction parallel to the connecting rod (523); the vertical distance between the second end of the pressure rod (51) and the top of the filter cylinder (2) is less than or equal to the vertical distance between the first end of the pressure rod (51) and the top of the support frame (5211); Preferably, the driving member (524) is slidably disposed on the supporting frame (5211).

10. A dehydration device, characterized in that: The filter cylinder (2) comprises a filter cylinder (2), the top of which is provided with a cloth-pushing and spreading device (1) for laying filter cloths (71) in layers in the filter cylinder (2) and spraying materials onto the filter cloths (71), and a cloth-pressing assembly for a dewatering device according to any one of claims 1 to 9 is installed on the side of the filter cylinder (2) close to the cloth-pushing and spreading device (1); Preferably, a cloth pushing head (113) which extends downwardly and can rotate up and down is provided at the front end of the cloth pushing and spreading device (1) along the feeding direction, and the first end of the cloth pushing head (113) is connected to the front end of the cloth pushing and spreading device (1) along the feeding direction; Before the cloth pushing and spreading device (1) is fed, the pressing rod (51) of the cloth pressing assembly presses the filter cloth (71) tightly onto the filter cylinder (2); During the feeding process of the cloth pushing and spreading device (1), the cloth pushing head (113) abuts against the filter cloth (71), and the second end of the cloth pushing head (113) opposite to the first end rotates downward, and the distance between the bottom of the second end of the cloth pushing head (113) and the top of the filter cylinder (2) is greater than the distance between the top of the pressure rod (51) and the top of the filter cylinder (2).

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