A filter press with easy-to-remove filter cloth

Abstract

This invention discloses a filter press with convenient filter cloth disassembly. A positioning plate is fixed at the upper left end of the frame, and a pressing plate is slidably arranged at the upper right end of the frame. Multiple filter plates are arranged between the positioning plate and the pressing plate. An abutment plate is pressed between every two adjacent filter plates. A hanging mechanism is connected between the upper parts of every two adjacent filter plates. Filter cloth is suspended on the hanging rod. The two ends of the filter cloth are connected to the lower ends of two adjacent filter plates. By setting multiple sets of hanging mechanisms above the frame, and cooperating with the fixing rods set below the filter plates, the left and right ends of the filter cloth can be connected to the fixing rods, and the middle part is connected to the hanging rods in the hanging mechanism. This means that only one set of filter cloth needs to be installed between two adjacent filter plates, reducing the number of filter cloths in the entire filter press, simplifying the installation and disassembly of the filter cloth, improving the installation and disassembly efficiency, and ensuring a sealing effect while facilitating filter cloth installation.

Description

Technical Field

[0001] This invention relates to the field of filter press technology, and in particular to a filter press that allows for easy removal of the filter cloth. Background Technology

[0002] A filter press is a solid-liquid separation device that uses a special filter medium to apply pressure to a material, causing the liquid to seep out. The main components of a filter press are multiple filter plates that are pressed together. Filter cloths are provided on both sides of the filter plates for solid-liquid separation, so that the liquid passes through the filter cloth into the interior of the filter plate and is discharged, while the solids remain on the surface of the filter cloth.

[0003] When installing filter cloths on filter plates in a filter press, two filter cloths are usually fitted onto the left and right sides of the filter plate, respectively, and the overlapping parts of the two filter cloths are tied together with cable ties. Alternatively, the filter cloths can be directly fixed to the surface around the filter plate with multiple screws. The holes in the middle of the filter cloths also need to fit into the holes in the middle of the filter plate. Pipes or other objects are used to ensure that the holes in the filter cloths and the holes in the filter plate fit tightly to prevent leakage of the medium through the gaps at the joints.

[0004] Currently, filter presses require a set of filter cloths on both sides of the filter plates, and each set needs to be installed or removed separately. This means that when disassembling each filter plate, the filter cloth on one side must be removed first, followed by the filter cloth on the other side. This results in a large number of filter cloths and makes installation and disassembly cumbersome. To address this, we have designed a filter press that facilitates the removal of filter cloths. Summary of the Invention

[0005] The present invention proposes a filter press with easy filter cloth disassembly, which solves the problem that a set of filter cloths needs to be set on both sides of the filter plate, and the two sets of filter cloths need to be installed or disassembled separately, resulting in a large number of filter cloths in total, and complicated operation during installation or disassembly.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A filter press for easy disassembly of filter cloth includes a frame. A positioning plate is fixed to the upper left end of the frame, and a pressing plate is slidably arranged to the upper right end of the frame. The right end of the pressing plate is connected to an external hydraulic cylinder for left and right movement of the pressing plate, thereby enabling the pressing plate to tightly press multiple filter plates together to form a sealed structure. Multiple filter plates are arranged between the positioning plate and the pressing plate, and an abutment plate is pressed between every two adjacent filter plates. L-shaped plates are symmetrically arranged in front and behind the filter plates and the pressing plate, and they are slidably placed on the frame through the L-shaped plates.

[0008] A hanging mechanism is connected between each pair of adjacent filter plates. The hanging mechanism includes two sets of extension structures symmetrically arranged above the filter plates. The lower ends of the two sides of the extension structures are rotatably connected to the upper ends of the adjacent filter plates. A hanging rod is provided between the two sets of extension structures. A tensioning structure is connected to the front and rear ends of the hanging rod. A cleaning mechanism is connected to the tensioning structure.

[0009] The filter cloth is suspended on the hanging rod. The filter cloth is folded in half. The two ends of the filter cloth are fixedly connected to the lower ends of two adjacent filter plates. The abutment plate is placed inside the filter cloth and the two abut against each other.

[0010] The extended structure includes an expansion block symmetrically arranged at the middle of the upper part of two adjacent filter plates. Two sets of connecting rods are symmetrically arranged on the outer side of the expansion block. The connecting rods are rotatably connected to the outer side of the expansion block through a shaft pin. The ends of the two connecting rods away from the expansion block are rotatably connected to the upper surface of the two adjacent filter plates through a shaft pin. A hanging rod is slidably arranged between the two sets of expansion blocks.

[0011] The tensioning structure includes movable slides symmetrically arranged on the front and rear sides. An extension plate is integrally formed on the inward side of the movable slide. A circular hole is formed through the extension plate at the top and bottom. A tensioning rod is slidably sleeved in the circular hole. The bottom ends of the two tensioning rods are connected to the outer ends of the hanging rod. A connecting pressure ring is fixed above the tensioning rod by screws. A tensioning spring is provided between the lower end of the connecting pressure ring and the upper part of the extension plate, and the tensioning spring is sleeved on the tensioning rod.

[0012] After the filter cloth is connected to the hanging rod and the fixing rod, the hanging rod tends to move upward under the action of the tensioning rod and the tensioning spring, which can make the filter cloth properly tensioned so that its surface will not wrinkle. When the two adjacent filter plates and the middle abutment plate are pressed together, the filter cloth can deform inward and be placed in the filter pressing groove.

[0013] The unfolding block forms a lifting hole through the front and back. A lifting slider is slidably installed in the lifting hole. The hanging rod is connected to the lifting slider. The lifting slider is fixedly sleeved on the hanging rod. The hanging rod can move up and down in the lifting hole, thereby facilitating the change of the position height of the hanging rod and adjusting the tension of the filter cloth. The position height of the connecting pressure ring can be adjusted as needed. The higher the connecting pressure ring is above the tensioning rod, the smaller the tendency of the tensioning spring to return to its original position, resulting in a smaller upward force on the hanging rod and a lower tension of the filter cloth, and vice versa.

[0014] The cleaning mechanism includes a drive rack fixed above a movable slide. An extension plate on the side of the movable slide forms a through-hole. A lifting rod is slidably sleeved inside the through-hole. The bottom end of the lifting rod is connected to the top of the unfolding block, and a mounting shaft is fixedly installed on the lifting rod. An output shaft is rotatably mounted on the mounting shaft via a bearing. A drive gear is installed at one end of the output shaft, and the drive gear meshes with the drive rack. An impact disc is installed at the other end of the output shaft. The outer surface of the impact disc is provided with multiple impact protrusions arranged in a circumferential array. The protrusion length of the impact protrusions can be changed according to actual needs, so that the downward displacement of the impact seat and tension rod is greater than the downward displacement of the unfolding block.

[0015] The tensioning rod is fixed with an impact seat at the top. A contact block is rotatably arranged above the impact seat. When two adjacent filter plates move away from each other, the unfolding block will descend under the action of the connecting deflector rod. At this time, the lifting rod will also drive the drive gear and the impact disc to descend together. Since the drive gear meshes with the drive rack, the drive gear will rotate, which in turn causes the impact disc to rotate.

[0016] During the rotation of the impact disc, the impact protrusions on the impact disc will contact the impact seat and move it downwards. At this time, the filter cloth will be in a relaxed state. When the impact protrusions detach from the impact seat, the filter cloth will be in a tense state again. This causes the filter cloth to repeatedly perform the action of tensioning-relaxing-tensioning, which can shake off the mud cake attached to the surface of the filter cloth and clean it.

[0017] Furthermore, the left and right sides of the filter plate are recessed inward to form filter pressing grooves. The left and right sides of the filter plate are connected by through holes, which are not connected to the filter chamber inside the filter plate. The filter plate itself has a filter cavity for separating solids and liquids, and the through holes are not connected to this filter cavity. The outer surfaces of the filter pressing grooves on the left and right sides are respectively provided with solid parts, which are aligned with the through holes. The side of the filter plate is connected by drainage holes, which are connected to the filter chamber inside the filter plate. After the sewage is filtered on the surface of the filter plate, the water will enter the filter chamber through the filter holes on the surface of the filter plate, and then be discharged outward through the drainage holes on the side.

[0018] Furthermore, the cross-sectional dimensions and shape of the abutment plate are consistent with those of the filter plate. A rectangular hole is formed through the middle of the abutment plate. Two sets of indentation plates are symmetrically arranged in the rectangular hole. There is a gap between the two sets of indentation plates to form a liquid inlet chamber. The middle of the indentation plate is designed with a circular structure, and the inner circle of the circular ring forms a liquid inlet hole consistent with the connecting hole. The outer diameter of the circular ring is consistent with the outer diameter of the solid part.

[0019] When the abutment plate is pressed between two adjacent filter plates, the ring can press with the solid part to form a sealed structure. Sewage cannot enter the space between the filter groove and the side of the filter cloth, but can only enter the space between the same set of filter cloths, that is, the liquid inlet chamber. In this way, the sewage can be filtered by the filter cloth, so that the filter cake stays on the two inner surfaces of the filter cloth.

[0020] Both sets of the in-depth plates have outward protrusions forming compaction sections. The thickness of the compaction sections is consistent with the depth of the filter groove. The compaction sections can penetrate deep into the filter groove, thereby pressing the ring and the solid part together. They also allow the left and right sides of the filter cloth to spread outward, increasing the space and facilitating the entry of wastewater into the filter.

[0021] Furthermore, symmetrically distributed socket notches are formed on both sides of the filter cloth. The inner diameter of the socket notch is smaller than the outer diameter of the ring and the solid part, and the inner diameter of the socket notch is larger than the outer diameter of the liquid inlet hole and the connecting hole. When the filter plate is pressed into contact with the abutment plate, the socket notch can be pressed between the solid part and the ring of the abutment plate, and the connecting hole can be connected to the liquid inlet hole. The socket notch is set to a reasonable size so that the filter cloth does not need to be too precise when installing the filter cloth, so that it has a certain error tolerance, thereby facilitating the installation of the filter cloth.

[0022] The width of the filter cloth is greater than the width of the filter plate's pressure groove. The filter cloth can contact the filter plate and the abutment plate from the front, back, top, and bottom, thereby pressing them together to form a sealed structure.

[0023] Furthermore, two sets of fixing rods are symmetrically arranged on the lower left and right sides of the filter plate. The filter cloth is hung on the hanging rods, and both ends of the filter cloth are fixed to the fixing rods close to the lower side of the adjacent filter plate. When installing the filter cloth, the middle position of the filter cloth is overlapped on the hanging rod. Then, the two ends of the filter cloth are fixed to the fixing rods on the left and right sides respectively by clamps or screws and other fasteners. Before fixing, the filter cloth is unfolded.

[0024] Then, spread out the part of the filter cloth above the hanging rod, and then fix it to the hanging rod with fasteners such as clips or screws. At this point, the installation of the filter cloth is complete. To disassemble, simply remove the connection between the fixing rod and the hanging rod.

[0025] Furthermore, the cross-section of the contact block is a right-angled triangular structure, and the bottom end of its inclined side is rotatably connected to the upper surface of the impact seat through a pin. The pin is also provided with a torsion spring for the contact block to reset. A notch is opened on the contact block, the pin is installed in the notch, and the torsion spring is sleeved on the pin. The torsion spring enables the bottom of the contact block to return to its original position and contact the upper surface of the impact seat after deflection.

[0026] The impact protrusion has a 1 / 4 circular structure, with one side being arc-shaped and the other side being straight. The arc-shaped structure is used to contact the inclined surface of the contact block and cause the impact seat to move downward. The straight side allows the impact seat to move upward and reset instantly when the arc-shaped side of the impact protrusion does not contact the inclined side of the contact block. The straight side is used to contact the right-angled surface of the contact block and cause it to deflect around the pivot pin, thereby allowing the impact disk to rotate normally and the impact seat to not move downward.

[0027] Furthermore, two sets of movable guide rods are symmetrically arranged on the upper part of the frame, and the movable slide blocks form movable sliding holes through the left and right sides. The movable slide blocks are slidably connected to the movable guide rods through the movable sliding holes. When one of the filter plates moves to the left, the expansion structure will unfold as a whole. At this time, the entire hanging mechanism and cleaning mechanism will also move accordingly, thereby enabling the corresponding filter cloth to be unfolded and disassembled. During the unfolding process, the filter cake after pressing can be detached from the surface of the filter cloth.

[0028] The beneficial effects of this invention are:

[0029] 1. By setting multiple sets of hanging mechanisms above the frame, and cooperating with the fixing rods set below the filter plates, the left and right ends of the filter cloth can be connected to the fixing rods, and the middle part is connected to the hanging rods in the hanging mechanism. This means that only one set of filter cloth needs to be installed between two adjacent filter plates, reducing the number of filter cloths in the entire filter press, simplifying the installation and disassembly of the filter cloth, and thus improving the installation and disassembly efficiency of the filter cloth. Solid parts are set on the left and right sides of the filter plate, and abutment plates are pressed between two adjacent filter plates, which facilitates the installation of filter cloth while ensuring the sealing effect and normal operation of the filter plate.

[0030] 2. By setting a tensioning structure on the hanging rod, the tensioning structure can move up and down with the hanging rod, which facilitates the unfolding and disassembly of the filter cloth. During the installation process, the tension of the tensioning structure can be adjusted as needed, so that the filter cloth can maintain its tension during installation and will not wrinkle, which facilitates its subsequent filter pressing operation.

[0031] 3. By setting a cleaning mechanism on the hanging mechanism, and connecting the cleaning mechanism with the tensioning structure and the expansion structure, the cleaning mechanism can move downward together with the tensioning mechanism and the expansion structure during the unfolding of the filter cloth. The tensioning structure causes the hanging rod to swing back and forth continuously during the downward movement, thereby causing the filter cloth to repeatedly perform the action of tensioning-relaxing-tensioning, which can shake off the mud cake attached to the surface of the filter cloth and clean the mud cake on the surface of the filter cloth. Attached Figure Description

[0032] Figure 1This is a front view of a filter press with easily removable filter cloth, as proposed in this invention.

[0033] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0034] Figure 3 for Figure 1 Front view;

[0035] Figure 4 for Figure 1 Axonometric projections of the front and rear angles;

[0036] Figure 5 for Figure 2 Schematic diagram of the middle abutment plate;

[0037] Figure 6 for Figure 1 Schematic diagram showing the connection between the intermediate filter plate, filter cloth, hanging mechanism, and cleaning mechanism;

[0038] Figure 7 for Figure 6 A schematic diagram of a structure without filter plates;

[0039] Figure 8 for Figure 6 A schematic diagram of the structure of the hanging mechanism and the cleaning mechanism after the middle filter plates are separated from each other;

[0040] Figure 9 for Figure 8 Enlarged view of a portion of the image;

[0041] Figure 10 for Figure 2 A schematic diagram of the hanging mechanism and cleaning mechanism after the middle filter plates are pressed and contacted with each other;

[0042] Figure 11 for Figure 8 Enlarged diagram of point B in the middle.

[0043] Labels in the diagram: 1. Frame; 2. Moving guide rod; 3. Pressing plate; 4. Positioning plate; 5. Abutment plate; 51. Deep insertion plate; 52. Liquid inlet chamber; 53. Liquid inlet hole; 6. Filter plate; 61. Filter pressing groove; 62. Connecting hole; 63. Solid part; 64. Fixing rod; 7. Filter cloth; 71. Socket notch; 8. Hanging mechanism; 81. Expansion structure; 811. Expanding block; 812. Lifting hole; 813. Connecting deflector rod; 82. Hanging 821. Connecting rod; 83. Lifting slider; 84. Tensioning structure; 85. Moving slide; 86. Moving slide hole; 87. Extension plate; 88. Tensioning rod; 89. Connecting pressure ring; 80. Tensioning spring; 90. Cleaning mechanism; 91. Drive rack; 92. Impact disc; 921. Impact protrusion; 93. Impact seat; 94. Contact block; 95. Torsion spring; 96. Drive gear; 97. Mounting shaft; 98. Lifting rod. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0045] Reference Figure 1-11 A filter press for easy disassembly of filter cloth includes a frame 1. A positioning plate 4 is fixed on the upper left end of the frame 1. A pressing plate 3 is slidably arranged on the upper right end of the frame 1. The right end of the pressing plate 3 is connected to an external hydraulic cylinder for left and right movement of the pressing plate 3, so that the pressing plate 3 can tightly press multiple filter plates 6 together to form a sealed structure. Multiple filter plates 6 are arranged between the positioning plate 4 and the pressing plate 3. An abutment plate 5 is pressed between every two adjacent filter plates 6. L-shaped plates are symmetrically arranged on the front and back of the filter plates 6 and the pressing plate 3. They are slidably placed on the frame 1 through the L-shaped plates.

[0046] A hanging mechanism 8 is connected between each pair of adjacent filter plates 6. The hanging mechanism 8 includes two sets of extension structures 81 symmetrically arranged above the filter plates 6. The lower ends of both sides of the extension structure 81 are rotatably connected to the upper ends of the adjacent filter plates 6. A hanging rod 82 is provided between the two sets of extension structures 81. A tensioning structure 83 is connected to the front and rear ends of the hanging rod 82. A cleaning mechanism 9 is connected to the tensioning structure 83.

[0047] A filter cloth 7 is suspended on the hanging rod 82. The filter cloth 7 is folded in half. The two ends of the filter cloth 7 are fixedly connected to the lower ends of two adjacent filter plates 6. The abutment plate 5 is placed inside the filter cloth 7 and the two abut against each other.

[0048] The extended structure 81 includes an expansion block 811 symmetrically arranged at the middle of the upper part of two adjacent filter plates 6. Two sets of connecting rods 813 are symmetrically arranged on the outer side of the expansion block 811. The connecting rods 813 are rotatably connected to the outer side of the expansion block 811 through a shaft pin. The ends of the two connecting rods 813 away from the expansion block 811 are respectively rotatably connected to the upper surface of the two adjacent filter plates 6 through a shaft pin. A hanging rod 82 is slidably arranged between the two sets of expansion blocks 811.

[0049] The tensioning structure 83 includes movable slides 831 symmetrically arranged on the front and rear sides. An extension plate 833 is integrally formed on the inner side of the movable slides 831. The extension plate 833 forms a circular hole through the top and bottom. Tensioning rods 834 are slidably sleeved in the circular hole. The bottom ends of the two tensioning rods 834 are connected to the outer end of the hanging rod 82. A connecting pressure ring 835 is fixed above the tensioning rods 834 by screws. A tensioning spring 836 abuts between the lower end of the connecting pressure ring 835 and the upper part of the extension plate 833, and the tensioning spring 836 is sleeved on the tensioning rods 834.

[0050] After the filter cloth 7 is connected to the hanging rod 82 and the fixing rod 64, the hanging rod 82 tends to move upward under the action of the tensioning rod 834 and the tensioning spring 836, so that the filter cloth 7 can be properly tensioned so that its surface will not wrinkle. When the two adjacent filter plates 6 and the middle abutment plate 5 are pressed together, the filter cloth 7 can deform inward and be placed in the filter pressing groove 61.

[0051] The unfolding block 811 extends through to form a lifting hole 812. A lifting slider 821 is slidably installed inside the lifting hole 812. The hanging rod 82 is connected to the lifting slider 821. The lifting slider 821 is fixedly sleeved on the hanging rod 82. The hanging rod 82 can move up and down inside the lifting hole 812, thereby facilitating the change of the position height of the hanging rod 82 and adjusting the tension of the filter cloth 7. The position height of the connecting pressure ring 835 can be adjusted as needed. The higher the connecting pressure ring 835 is above the tensioning rod 834, the smaller the tendency of the tension spring 836 to return to its original position, resulting in a smaller upward force on the hanging rod 82 and a lower tension of the filter cloth 7, and vice versa.

[0052] The cleaning mechanism 9 includes a drive rack 91 fixed above the movable slide 831. The extension plate 833 of the movable slide 831 extends vertically to form a through-hole. A lifting rod 96 is slidably sleeved inside the through-hole. The bottom end of the lifting rod 96 is connected to the top of the unfolding block 811. A mounting shaft 95 is fixedly installed on the lifting rod 96. An output shaft is rotatably installed on the mounting shaft 95 through a bearing. A drive gear 94 is installed at one end of the output shaft, and the drive gear 94 meshes with the drive rack 91. An impact disk 92 is installed at the other end of the output shaft. Multiple impact protrusions 921 are arranged in a circumferential array on the outer surface of the impact disk 92.

[0053] Mounting bearing 95 is fixed to lifting rod 96 with screws, and its position and height can be adjusted according to actual needs. The protrusion length of impact protrusion 921 can be replaced according to actual needs, so that the downward displacement of impact bearing 93 and tension rod 834 is greater than the downward displacement of unfolding block 811.

[0054] The top of the tension rod 834 is fixed with an impact seat 93, and a contact block 931 is rotatably arranged above the impact seat 93. When two adjacent filter plates 6 move away from each other, the unfolding block 811 will descend under the action of the connecting deflector rod 813. At this time, the lifting rod 96 will also drive the drive gear 94 and the impact disc 92 to descend together. Since the drive gear 94 meshes with the drive rack 91, the drive gear 94 will rotate, which will cause the impact disc 92 to rotate.

[0055] Furthermore, when the unfolding block 811 moves downward, the hanging rod 82 will also move downward. When the hanging rod 82 moves downward, it will move to the right together with the unfolding block 811 and the moving slide 831 to ensure that the entire filter cloth 7 is in a taut state. During the downward movement, the top of the hanging rod 82 tends to move upward under the action of the tension spring 836 and will contact the top of the lifting hole 812 and move downward together. During the rotation of the impact disc 92, the impact protrusion 921 on the impact disc 92 will contact the impact seat 93 and move downward.

[0056] The impact protrusion 921 causes the impact seat 93 and tension rod 834 to move downwards at a greater distance than they move downwards with the unfolding block 811. This means that the hanging rod 82 will move downwards a certain distance, and the filter cloth 7 will be in a relaxed state. When the impact protrusion 921 disengages from the impact seat 93, the hanging rod 82 will move upwards together with the tension rod 834 under the action of the tension spring 836. At this time, the filter cloth 7 will be in a tensile state again, thus causing the filter cloth 7 to repeatedly perform the action of tensioning-relaxing-tensioning, thereby shaking off the mud cake attached to the surface of the filter cloth 7 and cleaning it.

[0057] The left and right sides of the filter plate 6 are recessed inward to form a filter pressing groove 61. The left and right sides of the filter plate 6 are connected by a through hole 62, which is not connected to the filter chamber inside the filter plate 6. The outer surface of the filter pressing groove 61 on the left and right sides is provided with a solid part 63, which is aligned with the through hole 62. The side of the filter plate 6 is connected by a drain hole, which is connected to the filter chamber inside the filter plate 6. After the sewage is filtered on the surface of the filter plate 6, the water will enter the filter chamber through the filter holes on the surface of the filter plate 6, and then the clean water will be discharged outward through the drain hole on the side.

[0058] The cross-sectional dimensions and shape of the abutment plate 5 are the same as those of the filter plate 6. A rectangular hole is formed through the middle of the abutment plate 5. Two sets of indentation plates 51 are symmetrically arranged inside the rectangular hole. There is a gap between the two sets of indentation plates 51 to form a liquid inlet chamber 52. The middle of the indentation plate 51 is designed with a circular structure, and the inner circle of the circular ring forms a liquid inlet hole 53 that is consistent with the connecting hole 62. The outer diameter of the circular ring is consistent with the outer diameter of the solid part 63.

[0059] When the abutment plate 5 is pressed between two adjacent filter plates 6, the ring can be pressed with the solid part 63 to form a sealed structure. Sewage cannot enter the space between the filter pressing groove 61 and the side of the filter cloth 7, but can only enter the space in the middle of the same set of filter cloths 7, that is, the liquid inlet chamber 52. Thus, the sewage can be filtered by the filter cloth 7, so that the filter cake stays on the two inner surfaces of the filter cloth 7.

[0060] Both sets of in-depth plates 51 have outward protrusions forming compaction sections. The thickness of the compaction sections is consistent with the depth of the filter groove 61. The compaction sections can penetrate deep into the filter groove 61, thereby pressing the ring and the solid part 63 together. It also allows the left and right sides of the filter cloth 7 to spread outward, increasing the space and facilitating the entry of wastewater into the filter.

[0061] The filter cloth 7 has symmetrically distributed sleeve notches 71 on both sides. The inner diameter of the sleeve notch 71 is smaller than the outer diameter of the ring and the solid part 63, and the inner diameter of the sleeve notch 71 is larger than the outer diameter of the liquid inlet hole 53 and the connecting hole 62. When the filter plate 6 is pressed into contact with the abutment plate 5, the sleeve notch 71 can be pressed between the solid part 63 and the ring of the abutment plate 5, and the connecting hole 62 can be connected to the liquid inlet hole 53. The sleeve notch 71 is set with a reasonable size so that the filter cloth 7 does not need to be too precise when it is installed, so that it has a certain error tolerance, thus facilitating the installation of the filter cloth 7.

[0062] The width of the filter cloth 7 is greater than the width of the filter plate 6's pressure groove 61. The filter cloth 7 can contact the filter plate 6 and the abutment plate 5 from the front, back, top, and bottom, and thus can be pressed together to form a sealing structure.

[0063] Two sets of fixing rods 64 are symmetrically arranged on the left and right sides below the filter plate 6. The filter cloth 7 is hung on the hanging rod 82, and the two ends of the filter cloth 7 are respectively fixed to the fixing rods 64 close to the bottom of the adjacent filter plate 6.

[0064] When installing the filter cloth 7, the middle part of the filter cloth 7 is overlapped on the hanging rod 82. Then, the two ends of the filter cloth 7 are fixed to the fixing rods 64 on the left and right sides respectively with fasteners such as clips or screws. Before fixing, the filter cloth 7 is unfolded. Then, the part of the filter cloth 7 above the hanging rod 82 is unfolded back and forth. Then, it is fixed to the hanging rod 82 with fasteners such as clips or screws. At this time, the installation of the filter cloth 7 is completed. When disassembling, simply disconnect the connection between the fixing rod 64 and the hanging rod 82.

[0065] The contact block 931 has a right-angled triangular cross-section, and its bottom end on one side of the slope is rotatably connected to the upper surface of the impact seat 93 via a pin. The pin is also provided with a torsion spring 932 for resetting the contact block 931. The contact block 931 has a notch, the pin is installed in the notch, and the torsion spring 932 is sleeved on the pin. The torsion spring 932 enables the bottom of the contact block 931 to return to its original position and contact the upper surface of the impact seat 93 after deflection.

[0066] The impact protrusion 921 has a quarter-circular structure with an arc-shaped structure on one side and a straight structure on the other. The arc-shaped structure is used to contact the inclined surface of the contact block 931 and cause the impact seat 93 to move downward. The straight structure on one side allows the impact seat 93 to move upward and reset instantly when the arc-shaped side of the impact protrusion 921 does not contact the inclined side of the contact block 931. The straight structure on the other side is used to contact the right-angled surface of the contact block 931 and cause it to deflect around the shaft pin, thereby allowing the impact disk 92 to rotate normally and the impact seat 93 to not move downward.

[0067] Two sets of movable guide rods 2 are symmetrically arranged on the front and back of the frame 1. The movable slide 831 passes through the left and right to form a movable sliding hole 832. The movable slide 831 is slidably connected to the movable guide rod 2 through the movable sliding hole 832. When one of the filter plates 6 moves to the left, the expansion structure 81 will be fully unfolded. At this time, the entire hanging mechanism 8 and cleaning mechanism 9 will also move accordingly, so that the corresponding filter cloth 7 can be unfolded and disassembled. During the unfolding process, the filter cake after pressing can be detached from the surface of the filter cloth 7.

[0068] Working principle: When the filter press is in actual operation, each of the multiple filter plates 6 is connected to a pipe for discharging the filtered water through its drain holes. The right end of the pressing plate 3 is connected to an external hydraulic cylinder, which pushes the pressing plate 3 to move to the left, thereby pressing the multiple filter plates 6 tightly between the positioning plate 4 and the pressing plate 3. The positioning plate 4 is also provided with openings on the left and right sides for sewage to enter. The openings are connected to sewage pipes, allowing sewage to enter the space between the multiple filter plates 6 and be filtered. The sludge will remain on the surface of the filter cloth 7, while the clean water will enter the filter chamber and be discharged through the drain holes.

[0069] When the filter screen needs to be cleaned or disassembled, the pressing plate 3 moves to the rightmost end under the action of the hydraulic cylinder. Then, the external walking robot makes the rightmost filter plate 6 slide along the frame 1 to the right and approach the pressing plate 3. At this time, the unfolding block 811 between the two adjacent filter plates 6 will move to the right and down at the same time. The filter cloth 7 between the two adjacent filter plates 6 will also unfold. During the unfolding process, the unfolding block 811 moves down and the hanging rod 82 will also move down. It is worth noting that when the hanging rod 82 moves down, it will move to the right together with the unfolding block 811 and the moving slide 831 to ensure that the entire filter cloth 7 is in a taut state. During the downward movement, the top of the hanging rod 82 has an upward tendency under the action of the tension spring 836 and will contact the top of the lifting hole 812 and move down together.

[0070] At the same time, the lifting rod 96 will also drive the drive gear 94 and the impact plate 92 to descend together. Since the drive gear 94 meshes with the drive rack 91, the drive gear 94 will rotate, which will cause the impact plate 92 to rotate. During the rotation of the impact plate 92, the impact protrusion 921 on the impact plate 92 will contact the impact seat 93 and make it move downward. The impact protrusion 921 causes the impact seat 93 and the tension rod 834 to move downward by a greater displacement than they move downward with the unfolding block 811. That is, the hanging rod 82 will move downward by a certain distance. At this time, the filter cloth 7 will be in a relaxed state. When the impact protrusion 921 disengages from the impact seat 93, under the action of the tension spring 836, the hanging rod 82 will move upward together with the tension rod 834. At this time, the filter cloth 7 will be in a tense state again, which will cause the filter cloth 7 to repeatedly perform the action of tensioning-relaxing-tensioning, thereby shaking off the mud cake attached to the surface of the filter cloth 7 and cleaning it.

[0071] Once the filter cloth 7 is fully unfolded, the mud cake attached to its surface will also fall off. At this point, the surface can be rinsed with a water gun, and the fasteners connected to the fixing rod 64 and the hanging rod 82 can be removed. Then, the filter cloth 7 can be removed from the two adjacent filter plates 6. After that, the walking robot will move the multiple filter plates 6 to the right in sequence, and the filter cloth 7 can be removed one by one in the above manner.

[0072] When installing the filter cloth 7, the middle part of the filter cloth 7 is overlapped on the hanging rod 82. Then, the two ends of the filter cloth 7 are fixed to the fixing rods 64 on the left and right sides respectively with fasteners such as clips or screws. Before fixing, the filter cloth 7 is unfolded. Then, the part of the filter cloth 7 above the hanging rod 82 is unfolded back and forth. Then, it is fixed to the hanging rod 82 with fasteners such as clips or screws. At this time, the filter cloth 7 can be completely installed. After the filter cloth 7 is connected to the hanging rod 82 and the fixing rod 64, the hanging rod 82 has a downward tendency under the action of the tension rod 834 and the tension spring 836, which can make the filter cloth 7 properly tensioned so that its surface will not wrinkle. When the two adjacent filter plates 6 and the middle abutment plate 5 are pressed together, the filter cloth 7 can deform inward and be placed in the filter pressing groove 61.

[0073] Meanwhile, the hanging rod 82 can move up and down within the lifting hole 812, thereby facilitating the change of the position height of the hanging rod 82 and adjusting the tension of the filter cloth 7. The position height of the connecting pressure ring 835 can be adjusted as needed. The higher the connecting pressure ring 835 is above the tensioning rod 834, the smaller the tendency of the tensioning spring 836 to return to its original position, resulting in a smaller upward force on the hanging rod 82 and a lower tension of the filter cloth 7, and vice versa.

[0074] By setting multiple sets of hanging mechanisms 8 above the frame 1, and cooperating with the fixing rods 64 set below the filter plates 6, the left and right ends of the filter cloth 7 can be connected to the fixing rods 64, and the middle part is connected to the hanging rods 82 in the hanging mechanism 8. This means that only one set of filter cloth 7 needs to be installed between two adjacent filter plates 6, which reduces the number of filter cloths 7 in the entire filter press, simplifies the installation and disassembly of the filter cloth 7, and improves the installation and disassembly efficiency of the filter cloth 7. Solid parts 63 are set on the left and right sides of the filter plates 6, and abutment plates 5 are pressed between two adjacent filter plates 6, which facilitates the installation of the filter cloth 7 while ensuring the sealing effect and normal operation of the filter plates 6.

[0075] By setting a tensioning structure 83 on the hanging rod 82, the tensioning structure 83 can move up and down together with the hanging rod 82, which facilitates the unfolding and disassembly of the filter cloth 7. During the installation process, the tension of the tensioning structure 83 can be adjusted as needed, so that the filter cloth 7 can maintain its tension during installation and will not wrinkle, which facilitates its subsequent filter pressing operation.

[0076] By setting a cleaning mechanism 9 on the hanging mechanism 8, and connecting the cleaning mechanism 9 to the tensioning structure 83 and the extension structure 81, the cleaning mechanism 9 can move downward together with the tensioning mechanism and the extension structure 81 during the unfolding of the filter cloth 7. Furthermore, the cleaning mechanism 9 can cause the hanging rod 82 to swing back and forth continuously during the downward movement through the tensioning structure 83, thereby causing the filter cloth 7 to repeatedly perform the alternating action of tensioning-relaxing-tensioning, which can shake off the mud cake attached to the surface of the filter cloth 7 and clean the mud cake on the surface of the filter cloth 7.

[0077] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A filter press with easily removable filter cloth, comprising a frame (1), characterized in that, A positioning plate (4) is fixed on the upper left end of the frame (1), and a pressing plate (3) is slidably arranged on the upper right end of the frame (1). Multiple filter plates (6) are arranged between the positioning plate (4) and the pressing plate (3), and an abutment plate (5) is pressed between each two adjacent filter plates (6). A hanging mechanism (8) is connected between each pair of adjacent filter plates (6). The hanging mechanism (8) includes two sets of extension structures (81) symmetrically arranged above the filter plates (6) at the front and back. The lower ends of the two sides of the extension structure (81) are rotatably connected to the upper ends of the two adjacent filter plates (6), and a hanging rod (82) is provided between the two sets of extension structures (81). A tensioning structure (83) is connected to the front and back ends of the hanging rod (82), and a cleaning mechanism (9) is connected to the tensioning structure (83). The filter cloth (7) is suspended on the hanging rod (82). The filter cloth (7) is folded in half. The two ends of the filter cloth (7) are fixedly connected to the lower ends of the two adjacent filter plates (6). The abutment plate (5) is placed inside the filter cloth (7) and the two abut against each other. The extended structure (81) includes an expansion block (811) symmetrically arranged at the middle of the upper part of two adjacent filter plates (6). Two sets of connecting rods (813) are symmetrically arranged on the outer side of the expansion block (811). The connecting rods (813) are rotatably connected to the outer side of the expansion block (811) through a shaft pin. The ends of the two connecting rods (813) away from the expansion block (811) are respectively rotatably connected to the upper surface of the two adjacent filter plates (6) through a shaft pin. A hanging rod (82) is slidably arranged between the two sets of expansion blocks (811). The tensioning structure (83) includes symmetrically arranged movable slides (831) on the front and rear sides. An extension plate (833) is integrally formed on the inward side of the movable slide (831). The extension plate (833) forms a circular hole through the top and bottom. Tensioning rods (834) are slidably sleeved in the circular hole. The bottom ends of the two tensioning rods (834) are connected to the outer ends of the hanging rod (82). A connecting pressure ring (835) is fixed above the tensioning rods (834) by screws. A tension spring (836) abuts between the lower end of the pressure ring (835) and the upper part of the extension plate (833), and the tension spring (836) is sleeved on the tension rod (834). The unfolding block (811) forms a lifting hole (812) through the front and back. A lifting slider (821) is slidably arranged in the lifting hole (812). The hanging rod (82) is connected to the lifting slider (821), and the lifting slider (821) is fixedly sleeved on the hanging rod (82). The cleaning mechanism (9) includes a drive rack (91) fixed above a movable slide (831). An extension plate (833) on the side of the movable slide (831) forms a through-hole. A lifting rod (96) is slidably sleeved inside the through-hole. The bottom end of the lifting rod (96) is connected to the top of the unfolding block (811). A mounting seat (95) is fixedly installed on the lifting rod (96). An output shaft is rotatably installed on the mounting seat (95) via a bearing. A drive gear (94) is installed at one end of the output shaft. The drive gear (94) meshes with the drive rack (91). An impact disk (92) is installed at the other end of the output shaft. Multiple impact protrusions (921) are arranged in a circular array on the outer surface of the impact disk (92). An impact seat (93) is fixed at the top of the tension rod (834). A contact block (931) is rotatably arranged above the impact seat (93).

2. A filter press with easily removable filter cloth according to claim 1, characterized in that, The left and right sides of the filter plate (6) are recessed inward to form a filter pressing groove (61). The left and right sides of the filter plate (6) form a through hole (62), and the through hole (62) is not connected to the filter chamber inside the filter plate (6). The outer surface of the filter pressing groove (61) on the left and right sides is respectively provided with a solid part (63), and the solid part (63) is aligned with the through hole (62).

3. A filter press with easily removable filter cloth according to claim 2, characterized in that, The cross-sectional dimensions and shape of the abutment plate (5) are consistent with those of the filter plate (6). A rectangular hole is formed through the middle of the abutment plate (5). Two sets of indentation plates (51) are symmetrically arranged in the rectangular hole. There is a gap between the two sets of indentation plates (51) to form an inlet cavity (52). The middle of the indentation plate (51) is designed with a circular structure, and an inlet hole (53) is formed in the inner circle of the circular ring, which is consistent with the connecting hole (62). The outer diameter of the circular ring is consistent with the outer diameter of the solid part (63). Both sets of the in-depth plates (51) have outward protrusions forming compacted portions, the thickness of which is consistent with the depth of the filter groove (61).

4. A filter press with easily removable filter cloth according to claim 3, characterized in that, The filter cloth (7) has symmetrically distributed sleeve notches (71) on both sides. The inner diameter of the sleeve notch (71) is smaller than the outer diameter of the ring and the solid part (63), and the inner diameter of the sleeve notch (71) is larger than the outer diameter of the liquid inlet hole (53) and the connecting hole (62). The width of the filter cloth (7) is greater than the width of the filter groove (61) of the filter plate (6).

5. A filter press with easily removable filter cloth according to claim 1, characterized in that, Two sets of fixing rods (64) are symmetrically arranged on the left and right sides below the filter plate (6). The filter cloth (7) is hung on the hanging rod (82), and the two ends of the filter cloth (7) are respectively fixed to the fixing rods (64) below the adjacent filter plate (6).

6. A filter press with easily removable filter cloth according to claim 1, characterized in that, The cross-section of the contact block (931) is a right-angled triangle structure, and the bottom end of its inclined side is rotatably connected to the upper surface of the impact seat (93) through a shaft pin. The shaft pin is also provided with a torsion spring (932) for resetting the contact block (931). The impact protrusion (921) has a 1 / 4 circular structure, with one side having an arc shape and the other side having a straight line structure.

7. A filter press with easily removable filter cloth according to claim 6, characterized in that, Two sets of movable guide rods (2) are symmetrically arranged on the top of the frame (1). The movable slide (831) forms a movable sliding hole (832) through the left and right sides. The movable slide (831) is slidably connected to the movable guide rod (2) through the movable sliding hole (832).

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