Filter pressing type sewage filter

Abstract

The invention relates to the technical field of filter presses, in particular to a filter pressing type sewage filter which comprises a machine body, filter frame assemblies, baffle assemblies, telescopic assemblies and push rod assemblies, the multiple filter frame assemblies are connected with the machine body, each filter frame assembly comprises a frame body, a sliding groove, a sliding plate and a feeding port, the frame bodies are connected with the machine body, the sliding grooves are formed in the inner walls of the frame bodies, and the sliding plates are arranged in the sliding grooves. The sliding plate is in sliding connection with the sliding groove. By arranging the baffle assembly and the filter frame assembly, when filter pressing is finished, the baffle assembly is contracted into the filter frame assembly through the telescopic assembly, so that a plurality of filter cakes can be quickly discharged from the filter pressing chamber, and the movable edge in the baffle assembly is arranged to be a right trapezoid, so that the filter cakes can be conveniently separated from the bevel edge of the top of the movable edge; the width of the moving edge is set to be smaller than that of the filter plate, so that when the rear side of the moving edge is aligned with the rear side of the filter plate, a height difference exists between the front side of the filter plate and the front side of the moving edge, the bottom of the filter cloth is inclined inwards, and the filter cake is further convenient to fall off.

Description

Technical Field

[0001] The present invention relates to the technical field of filter presses, and particularly to a pressure filtration type sewage filter. Background Art

[0002] A chamber filter press is a filtration device that realizes solid-liquid separation based on the physical filtration of a filter cloth. A plurality of filter plates are tightly pressed against each other in pairs by a pressing device to form a sealed filtration chamber, and then a feeding pump is used to inject materials into the filtration chamber. Under the action of hydraulic pressure, the liquid penetrates through the filter cloth and is discharged, while the solid particles remain on the surface of the filter cloth to form a filter cake, thereby realizing solid-liquid separation.

[0003] When filtering muddy water, a filter cake will be formed inside the filtration chamber after filtration. After filtration, the filter cake between the two filter plates needs to be discharged before the next filtration can be carried out. However, in the prior art, a chamber filter press is composed of a plurality of filter plates. To discharge the filter cake, the filter plates need to be separated one by one, which takes a long time to clean. Moreover, the filter cake has a certain viscosity. When the two filter plates are separated, the filter plates need to be shaken to shake off the filter cake from the filter plates, further increasing the cleaning time, resulting in a long interval time between two filtrations and affecting the filtration efficiency.

[0004] Therefore, a pressure filtration type sewage filter is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a pressure filtration type sewage filter to solve the problem that the discharge speed of the filter cake is slow when the chamber filter press finishes filtration, which affects the working efficiency. By setting the filter plates as telescopic structures, when filtering, the front and back sides of a plurality of filter plates are simultaneously extended to form a sealed pressure filtration space. At the end of pressure filtration, the front and back sides of the plurality of filter plates are simultaneously contracted to separate the filter plates from the filter cake, and a discharge channel is formed at the bottom between two adjacent frames, facilitating the discharge of the filter cake, thereby improving the discharge speed of the filter cake. Moreover, when contracting, the filter cake will automatically fall off, and at the same time, the overall installation space is also shortened.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A pressure filtration type sewage filter, comprising a machine body, a filter frame assembly, a filtering assembly, a telescopic assembly and a push rod assembly. A plurality of the filter frame assemblies are connected to the machine body. The filter frame assembly includes a frame body, a sliding groove, a sliding plate and a feed inlet. The frame body is connected to the machine body. The sliding groove is formed on the inner wall of the frame body. The sliding plate is slidably connected to the sliding groove. The feed inlet is formed in the middle of the frame body. The filtering assembly is connected to the sliding plate. The telescopic assembly is connected to the filtering assembly. The push rod assembly is connected to the machine body and is connected to the bottom of the telescopic assembly. The machine body squeezes a plurality of frame bodies together and squeezes the push rod assembly to push the telescopic assembly to move upward. When the telescopic assembly moves upward, it will push the filtering assembly to move outwards of the frame body, and make the filtering assemblies inside two adjacent frame bodies approach each other to form a sealed space. By pulling back the push rod assembly to make the telescopic assembly move downward, when the telescopic assembly moves downward, it drives the filtering assembly to move into the frame body, and makes the filtering assemblies inside two adjacent frame bodies move away from each other, and a discharge channel is formed at the bottom between two adjacent frame bodies.

[0008] In the above solution, in order to be able to discharge the filter cake between multiple filter plates simultaneously at the end of pressure filtration, the original integral structure is set into a telescopic structure. The telescopic assembly is driven by the push rod assembly to control the movement of the filtering assembly on the inner wall of the filter frame assembly, so as to realize the elongation and contraction of the whole filter plate. During pressure filtration, the telescopic assembly is used to push the filtering assembly to move, so that the filtering assemblies between two filter frame assemblies approach each other, thus forming a sealed pressure filtration chamber. At the end of pressure filtration, the telescopic assembly is used to control the movement of the filtering assembly again, so that the filtering assemblies between two filter frame assemblies move away from each other, thus opening the filter chamber to discharge the filter cake. And in this solution, when discharging the filter cake, since the movement of the frame body is not required, the reserved moving distance for the aluminum frame can be shortened, thereby reducing the overall volume and the installation space.

[0009] Preferably, the filtering assembly includes a filter plate and a moving edge. The filter plate is connected to the sliding plate. The moving edge is slidably connected to the inside of the frame body. Filter cloths are connected to the sides of the filter plate and the moving edge away from the telescopic assembly, and the filter cloth on the filter plate and the filter cloth on the moving edge are an integral body.

[0010] In the above solution, water is filtered out from impurities through the filter cloth. The bottom between two frame bodies is sealed by the mutual fitting of the moving edges on the two frame bodies. Thus, when the two frame bodies are fitted, a sealed pressure filtration chamber is formed between the filter plates. At the end of pressure filtration, the telescopic assembly is used to make the moving edge and the filter plate contract into the frame body, while the frame body remains stationary, thereby opening the bottom of the pressure filtration chamber to facilitate the falling off of the filter cake, and increasing the width of the pressure filtration chamber and the falling-off space of the filter cake.

[0011] Preferably, the cross-section of the moving edge is set as a right trapezoid, and there is an inclined surface above it. The width of the moving edge is smaller than the width of the filter plate.

[0012] In the above solution, the moving edge is set as a right trapezoid, so that a groove will be formed when the filter plate and the top of the moving edge are aligned. When the two frames are fitted together, a pressure filtration chamber will be formed in the middle. After the pressure filtration is completed, when the filter plate and the moving edge contract together, the inclined surface above the moving edge facilitates the separation of the filter cake from the filter cloth. The width of the moving edge is smaller than the width of the filter plate. When the rear side of the moving edge is aligned with the rear side of the filter plate, there is a height difference between the front side of the filter plate and the front side of the moving edge, so that the bottom of the filter cloth inclines inward, further facilitating the shedding of the filter cake.

[0013] Preferably, the telescopic assembly includes an upper moving plate, a lower moving plate, a first hinge rod and a second hinge rod. The upper moving plate is slidably connected to the inner wall of the frame. The lower moving plate is slidably connected to the bottom of the upper moving plate. A plurality of first hinge rods are connected to the front and rear sides of the upper moving plate. The second hinge rod is connected to the front and rear sides of the lower moving plate. The push rod assembly includes a moving rod and a third hinge rod. The moving rod is connected to the machine body. The third hinge rod is hinged to the moving rod and its top end is hinged to the lower moving plate.

[0014] In the above solution, during filtration, by pushing the upper moving plate and the lower moving plate upward, the first hinge rod and the second hinge rod are changed from an inclined state to a horizontal state, so that the ends of the first hinge rod and the second hinge rod move away from the upper moving plate and the lower moving plate. Since the upper moving plate and the lower moving plate can only move up and down, the filter plate will be pushed to move away from the upper moving plate, so that the filter plate and the moving edge between the two frames approach each other and cooperate with the frame to form a sealed pressure filtration chamber. At the end, the upper moving plate and the lower moving plate move downward, so that the ends of the first hinge rod and the second hinge rod approach the upper moving plate and the lower moving plate, thereby pulling the filter plate and the moving edge to contract into the frame. And during filtration, the moving trend of the filter plate when it is subjected to the extrusion force is horizontal. Therefore, the direction when the filter plate transfers the thrust to the first hinge rod is also horizontal, parallel to the first hinge rod and perpendicular to the upper moving plate, and will not cause the upper moving plate to have a moving trend, so that the first hinge rod remains stationary and plays a supporting role for the filter plate.

[0015] Preferably, the length of the first hinge rod is smaller than that of the second hinge rod. The first hinge rod is connected to the filter plate, and the second hinge rod is connected to the moving edge.

[0016] In the above solution, since the second hinge rod is connected to the outer wall of the lower moving plate, and the downward movement distance of the lower moving plate is greater than that of the upper moving plate. Therefore, when the lower moving plate moves completely downward, the moving edge contracts and moves a greater distance, so that the front side of the moving edge contracts deeper relative to the front side of the filter plate, thus facilitating the shedding of the filter cake.

[0017] Preferably, the cross section of the filter plate is set as an isosceles trapezoid, and the corresponding side of the filter plate and the telescopic assembly is set as a narrow side.

[0018] In the above solution, since the thrust of the filter plate all comes from the first hinge rod, and the connection between the filter plate and the first hinge rod is equivalent to a point connection. In order to make the pressure between the front side of the filter plate and the filter cake more uniform, the cross-section of the filter plate is set as an isosceles trapezoid, implementing a principle similar to that of an arch bridge. Thus, the thrust of the first hinge rod can be evenly transmitted to the front side of the filter plate. At the same time, due to the stability of the isosceles trapezoid, when the front side of the filter plate receives the reaction thrust from the filter cake, it can also evenly transmit the reaction thrust to the rear side of the filter plate, reducing the deformation of the filter plate and increasing the service life of the filter plate.

[0019] Preferably, sealing plates are connected to the front and rear sides of the frame body, and sealing edges are connected to the left and right sides and the upper side of the outer wall of the filter plate, and the sealing edges cooperate with the sealing plates.

[0020] In the above solution, when pressure filtration is carried out, when the filter plate extends from the inside of the frame body to the outer wall, the sealing plate and the sealing edge are closely attached, so that a seal is formed between the filter plate and the inner wall of the frame body. When the pressure filtration ends, since the edge of the filter cake is attached to the sealing edge, when the filter plate contracts towards the inside of the frame body, the sealing plate hinders the filter cake from moving with the filter plate, so that the filter cake and the filter cloth are separated, facilitating the shedding of the filter cake.

[0021] Furthermore, sealing grooves are provided on the inner wall of the frame body, trapezoidal blocks are connected to the left and right sides of the moving edge, and the sealing grooves cooperate with the trapezoidal blocks.

[0022] In the above solution, through the cooperation of the sealing grooves and the trapezoidal blocks, a seal is formed between the moving edge and the inner wall of the frame body, thereby improving the sealing performance of the pressure filtration chamber.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. By setting the filtering component and the filter frame component, during filtration, a pressure filtration chamber is formed by the mutual fitting of the two groups of filtering components and the filter frame component. When the pressure filtration ends, the filtering component is contracted into the filter frame component through the telescopic component, thereby increasing the space in front of and behind the pressure filtration chamber, causing the filter cake to lose the extrusion force, so that multiple filter cakes are discharged from the pressure filtration chamber, thus accelerating the cleaning speed and avoiding the movement of the frame body, thereby reducing the reserved displacement distance for the frame body, and further reducing the overall volume.

[0025] 2. By setting the sealing plate and the sealing edge, the sealing plate and the sealing edge are closely attached, so that a seal is formed between the filter plate and the inner wall of the frame body. When the pressure filtration ends, since the edge of the filter cake is attached to the sealing edge, when the filter plate contracts towards the inside of the frame body, the sealing plate hinders the filter cake from moving with the filter plate, so that the filter cake and the filter cloth are separated, and the filter cake automatically falls off.

[0026] 3. By setting the telescopic component and making the length of the first hinge rod less than that of the second hinge rod, the moving distance of the moving edge is greater than that of the filter plate. As a result, the front side of the moving edge can be located behind the front side of the filter plate, facilitating the shedding of the filter cake. Moreover, during pressure filtration, the first hinge rod and the upper moving plate are in a vertical state, providing support force for the filter plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a schematic diagram of the structure of the filter frame assembly of the present invention;

[0029] Figure 3 is a schematic diagram of the right - view cross - section of the filter frame assembly of the present invention;

[0030] Figure 4 is a schematic diagram of the structure of the chute of the present invention;

[0031] Figure 5 is a schematic diagram of the structure of the telescopic component of the present invention;

[0032] Figure 6 is a schematic diagram of the structure when the filter frame assemblies of the present invention are in contact with each other;

[0033] Figure 7 of the present invention Figure 6 is an enlarged schematic diagram of part A in;

[0034] Figure 8 is a schematic diagram of the structure when the filter plate is retracted in the present invention.

[0035] In the figure: 1. Machine body; 2. Filter frame assembly; 201. Frame body; 202. Chute; 203. Slide plate; 204. Feed inlet; 205. Sealing plate; 206. Sealing groove; 3. Filtering assembly; 301. Filter plate; 302. Moving edge; 303. Sealing edge; 304. Trapezoidal block; 4. Telescopic component; 401. Upper moving plate; 402. Lower moving plate; 403. First hinge rod; 404. Second hinge rod; 5. Push rod assembly; 501. Moving rod; 502. Third hinge rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention, and in combination with the working state, making its structural features more detailed. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.

[0037] Please refer to Figures 1 to 8 , the present invention provides a pressure - filtration type sewage filter, and the technical solution is as follows:

[0038] A pressure - filtration type sewage filter, referring to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 6 、 Figure 7 and Figure 8 , includes a machine body 1, a filter frame assembly 2, a filtering assembly 3, a telescopic assembly 4 and a push - rod assembly 5. A plurality of the filter frame assemblies 2 are connected to the machine body 1, setting the original integral structure into a telescopic structure. The telescopic assembly 4 is driven by the push - rod assembly 5 to control the movement of the filtering assembly 3 on the inner wall of the filter frame assembly 2, so as to realize the elongation and contraction of the whole filter plate 301. The filter frame assembly 2 includes a frame body 201, a sliding groove 202, a sliding plate 203 and a feed inlet 204. The frame body 201 is connected to the machine body 1. The sliding groove 202 is opened on the inner wall of the frame body 201. The sliding plate 203 is slidably connected to the sliding groove 202. The feed inlet 204 is opened in the middle of the frame body 201. The filtering assembly 3 is connected to the sliding plate 203. The telescopic assembly 4 is connected to the filtering assembly 3. The push - rod assembly 5 is connected to the machine body 1 and is connected to the bottom of the telescopic assembly 4. The machine body 1 squeezes a plurality of frame bodies 201 together and squeezes the push - rod assembly 5 to push the telescopic assembly 4 to move upward. When the telescopic assembly 4 moves upward, it will push the filtering assembly 3 to move out of the frame body 201, and make the filtering assemblies 3 in the inner parts of two adjacent frame bodies 201 approach each other to form a sealed space. By pulling back the push - rod assembly 5 to make the telescopic assembly 4 move downward, when the telescopic assembly 4 moves downward, it drives the filtering assembly 3 to move into the frame body 201, and makes the filtering assemblies 3 in the inner parts of two adjacent frame bodies 201 move away from each other, and a discharge channel is formed at the bottom between two adjacent frame bodies 201 to discharge the filter cake.

[0039] As an embodiment of the present invention, referring to Figure 4 and Figure 5 , the filtering assembly 3 includes a filter plate 301 and a moving edge 302. The filter plate 301 is connected to the sliding plate 203. The moving edge 302 is slidably connected inside the frame body 201, and the whole filter cloth is connected to the surfaces of the filter plate 301 and the moving edge 302. The filter plate 301 and the moving edge 302 are pushed to move by the telescopic assembly 4. The moving edges 302 on two frame bodies 201 are mutually attached to seal the bottom between the two frame bodies 201. Thus, when the two frame bodies 201 are attached, a sealed pressure - filtration chamber is formed between the filter plates 301. At the end of pressure - filtration, the telescopic assembly 4 makes the moving edge 302 and the filter plate 301 contract into the frame body 201 while the frame body 201 remains stationary, so as to open the bottom of the pressure - filtration chamber, facilitating the shedding of the filter cake, and increasing the width of the pressure - filtration chamber and the shedding space of the filter cake.

[0040] As an embodiment of the present invention, referring to Figure 4 and Figure 5 , the cross-section of the moving edge 302 is set as a right trapezoid, so that the front side of the moving edge 302 is more convex relative to the front side of the filter plate 301. When the top edge of the moving edge 302 is aligned with the bottom edge of the filter plate 301, a groove is formed, and a pressure filtration chamber will be formed between the two frame bodies 201 when they are fitted. And there is an inclined surface above. After the pressure filtration is completed, the filter plate 301 and the moving edge 302 contract together. The inclined surface above the moving edge 302 facilitates the filter cake to slide down from the top of the moving edge 302, thereby facilitating the separation of the filter cake from the filter cloth. The width of the moving edge 302 is smaller than the width of the filter plate 301. When the rear side of the moving edge 302 is aligned with the rear side of the filter plate 301, there is a height difference between the front side of the filter plate 301 and the front side of the moving edge 302, so that the bottom of the filter cloth inclines inwards, further facilitating the shedding of the filter cake.

[0041] As an embodiment of the present invention, referring to Figure 5 , the telescopic assembly 4 includes an upper moving plate 401, a lower moving plate 402, a first hinge rod 403 and a second hinge rod 404. The upper moving plate 401 is slidably connected to the inner wall of the frame body 201. The lower moving plate 402 is slidably connected to the bottom of the upper moving plate 401. A plurality of first hinge rods 403 are connected to the front and rear sides of the upper moving plate 401. During filtration, by pushing the upper moving plate 401 and the lower moving plate 402 to move upwards, the first hinge rod 403 and the second hinge rod 404 are changed from an inclined state to a horizontal state, so that the ends of the first hinge rod 403 and the second hinge rod 404 are far away from the upper moving plate 401 and the lower moving plate 402. Because the upper moving plate 401 and the lower moving plate 402 can only move up and down, the filter plate 301 will be pushed to move away from the upper moving plate 401, so that the filter plate 301 and the moving edge 302 between the two frame bodies 201 approach each other and cooperate with the frame body 201 to form a sealed pressure filtration chamber. At the end, the upper moving plate 401 and the lower moving plate 402 move downwards, so that the ends of the first hinge rod 403 and the second hinge rod 404 approach the upper moving plate 401 and the lower moving plate 402, thereby pulling the filter plate 301 and the moving edge 302 to contract towards the inside of the frame body 201. The second hinge rod 404 is connected to the front and rear sides of the lower moving plate 402. The push rod assembly 5 includes a moving rod 501 and a third hinge rod 502. The moving rod 501 is connected to the machine body 1. The third hinge rod 502 is hinged to the moving rod 501 and the top end is hinged to the lower moving plate 402. When it moves forward under the action of the power mechanism of the machine body 1, the third hinge rod 502 is in a vertical state at this time, thereby pushing the upper moving plate 401 and the lower moving plate 402 to move upwards.

[0042] As an embodiment of the present invention, referring to Figure 4 andFigure 5 The length of the first hinge rod 403 is less than that of the second hinge rod 404. The first hinge rod 403 is connected to the filter plate 301, and the second hinge rod 404 is connected to the moving edge 302. The second hinge rod 404 is connected to the outer wall of the lower moving plate 402, and the downward displacement distance of the lower moving plate 402 is greater than that of the upper moving plate 401. Therefore, when the lower moving plate 402 is completely lowered, it will pull the moving edge 302 to contract and move a greater distance, so that the front side of the moving edge 302 contracts deeper relative to the front side of the filter plate 301, facilitating the shedding of the filter cake.

[0043] As an implementation manner of the present invention, referring to Figure 4 and Figure 5 , the cross-section of the filter plate 301 is an isosceles trapezoid, and the corresponding side of the filter plate 301 and the telescopic assembly 4 is a narrow side, realizing the principle similar to that of an arch bridge, so that the thrust of the first hinge rod 403 can be evenly transmitted to the front side of the filter plate 301. At the same time, due to the stability of the isosceles trapezoid, when the front side of the filter plate 301 is subjected to the reaction force of the filter cake, the reaction force can also be evenly transmitted to the rear side of the filter plate 301, reducing the deformation of the filter plate 301 and improving the service life of the filter plate 301.

[0044] As an implementation manner of the present invention, referring to Figure 4 and Figure 5 , sealing plates 205 are connected to the front and rear sides of the frame body 201. Sealing edges 303 are connected to the left and right sides and the upper side of the outer wall of the filter plate 301. The sealing edges 303 cooperate with the sealing plates 205. When pressure filtration is carried out, when the filter plate 301 extends from the inside of the frame body 201 to the outer wall, the sealing plates 205 and the sealing edges 303 are closely attached, so that a seal is formed between the filter plate 301 and the inner wall of the frame body 201. When the pressure filtration ends, since the edge of the filter cake is attached to the sealing edge 303, when the filter plate 301 contracts towards the inside of the frame body 201, the sealing plate 205 hinders the filter cake from moving with the filter plate 301, so that the filter cake and the filter cloth are separated, facilitating the shedding of the filter cake.

[0045] As an implementation manner of the present invention, referring to Figure 4 and Figure 5 , sealing grooves 206 are formed in the inner wall of the frame body 201. Trapezoidal blocks 304 are connected to the left and right sides of the moving edge 302. The sealing grooves 206 cooperate with the trapezoidal blocks 304. Through the cooperation of the sealing grooves 206 and the trapezoidal blocks 304, a seal is formed between the moving edge 302 and the inner wall of the frame body 201, thereby improving the sealing performance of the pressure filtration chamber.

[0046] Working principle: When starting filtration, the body 1 presses a plurality of frame bodies 201 against each other in sequence front and back, so as to form a closed pressure filtration chamber between two frame bodies 201 for pressure filtration;

[0047] In order to quickly discharge the filter cake at the end of the pressure filtration, the original pressing plate is set as a telescopic structure. When the filtration ends, by simultaneously contracting the filtration part while the main body part remains stationary, the speed of discharging the filter cake is accelerated, thereby improving the working efficiency.

[0048] Specifically: The original power mechanism of the machine body 1 is used to push the moving rod 501 forward. When the moving rod 501 moves forward, the third hinge rod 502 changes from an inclined state to a vertical state, thereby pushing the upper moving plate 401 and the lower moving plate 402 upward. At this time, the first hinge rod 403 and the second hinge rod 404 change from an inclined state to a horizontal state, so that the ends of the first hinge rod 403 and the second hinge rod 404 move away from the upper moving plate 401 and the lower moving plate 402, and then push the filter plate 301 and the moving edge 302 to move in the direction outside the frame body 201.

[0049] At this time, the sealing edge 303 and the sealing plate 205 are closely attached, forming a seal at the connection between the filter plate 301 and the frame body 201. At the same time, the trapezoidal block 304 and the inner wall of the sealing groove 206 are closely attached, forming a seal at the connection between the frame body 201 and the moving edge 302, so that a closed pressure filtration chamber is formed between two adjacent frame bodies 201, and the sewage enters the inside of the pressure filtration chamber through the feed port 204 for pressure filtration.

[0050] When the pressure filtration ends, the original power mechanism of the machine body 1 is used to push the moving rod 501 backward, so that the third hinge rod 502 changes from a vertical state to an inclined state, and then the third hinge rod 502 pulls the upper moving plate 401 and the lower moving plate 402 to move downward together, and respectively pulls the filter plate 301 and the moving edge 302 to contract into the frame body 201 through the first hinge rod 403 and the second hinge rod 404. When the upper moving plate 401 moves down to the specified position, since the sliding groove 202 restricts the movement of the frame body 201, and thus restricts the downward movement of the upper moving plate 401. Continuing to pull back the moving rod 501, the lower moving plate 402 continues to move down a certain distance, and the moving edge 302 continues to contract inward, so as to form a discharge channel with a downward opening between the two frame bodies 201, and there is a height difference between the front side of the filter plate 301 and the front side of the moving edge 302, so that the bottom of the filter cloth inclines inward, further facilitating the shedding of the filter cake.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirits of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure filtration type sewage filter, comprising a machine body (1), characterized in that: It also includes a filter frame assembly (2), a filtering assembly (3), a telescopic assembly (4) and a push rod assembly (5). A plurality of the filter frame assemblies (2) are connected to the machine body (1). The filter frame assembly (2) includes a frame body (201), a chute (202), a sliding plate (203) and a feed inlet (204). The frame body (201) is connected to the machine body (1). The chute (202) is formed on the inner wall of the frame body (201). The sliding plate (203) is slidably connected to the chute (202). The feed inlet (204) is formed in the middle of the frame body (201). The filtering assembly (3) is connected to the sliding plate (203). The telescopic assembly (4) is connected to the filtering assembly (3). The push rod assembly (5) is connected to the machine body (1), and the push rod assembly (5) is connected to the bottom of the telescopic assembly (4). The machine body (1) squeezes a plurality of frame bodies (201) together and squeezes the push rod assembly (5) to push the telescopic assembly (4) to move upward. The upward movement of the telescopic assembly (4) will push the filtering assembly (3) to move outward from the frame body (201), so that the filtering assemblies (3) inside two adjacent frame bodies (201) approach each other to form a sealed space. By pulling back the push rod assembly (5), the telescopic assembly (4) moves downward. When the telescopic assembly (4) moves downward, it drives the filtering assembly (3) to move into the frame body (201), so that the filtering assemblies (3) inside two adjacent frame bodies (201) move away from each other, and a discharge channel is formed at the bottom between two adjacent frame bodies (201).

2. The pressure filtration type sewage filter according to claim 1, characterized in that: The filtering assembly (3) includes a filter plate (301) and a moving edge (302). The filter plate (301) is connected to the sliding plate (203). The moving edge (302) is slidably connected to the inside of the frame body (201).

3. The pressure filtration type sewage filter according to claim 2, characterized in that: The cross section of the filter plate (301) is an isosceles trapezoid, and the side corresponding to the telescopic assembly (4) of the filter plate (301) is the narrow side.

4. The pressure filtration type sewage filter according to claim 3, characterized in that: The cross section of the moving edge (302) is a right trapezoid, and there is an inclined surface above it. The width of the moving edge (302) is smaller than the width of the filter plate (301).

5. The pressure filtration type sewage filter according to claim 3, wherein: The telescopic assembly (4) includes an upper moving plate (401), a lower moving plate (402), a first hinge rod (403) and a second hinge rod (404). The upper moving plate (401) is slidably connected to the inner wall of the frame body (201). The lower moving plate (402) is slidably connected to the bottom of the upper moving plate (401). A plurality of first hinge rods (403) are connected to the front and rear sides of the upper moving plate (401). The second hinge rod (404) is connected to the front and rear sides of the lower moving plate (402). The push rod assembly (5) includes a moving rod (501) and a third hinge rod (502). The moving rod (501) is connected to the machine body (1). The third hinge rod (502) is hinged to the moving rod (501), and the top end is hinged to the lower moving plate (402).

6. The pressure filtration type sewage filter according to claim 5, characterized in that: The length of the first hinge rod (403) is smaller than that of the second hinge rod (404). The first hinge rod (403) is connected to the filter plate (301). The second hinge rod (404) is connected to the moving edge (302).

7. The pressure filtration type sewage filter according to claim 2, characterized in that: Sealing plates (205) are connected to the front and rear sides of the frame body (201), and sealing edges (303) are connected to the left and right sides and the upper side of the outer wall of the filter plate (301), and the sealing edges (303) cooperate with the sealing plates (205).

8. A pressure filtration type sewage filter according to claim 7, characterized in that: Sealing grooves (206) are formed in the inner wall of the frame body (201), trapezoidal blocks (304) are connected to the left and right sides of the moving edge (302), and the sealing grooves (206) cooperate with the trapezoidal blocks (304).

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