Plate-and-frame filter press for sludge treatment

Abstract

The invention relates to the technical field of filter presses, in particular to a plate-and-frame filter press for sludge treatment. Comprising a filter press frame, a plurality of filter plates are arranged on the filter press frame, filter cloth is arranged on the filter plates, two supports are fixedly connected to the filter plates, the supports are slidably connected with a supporting frame, the supporting frame is slidably connected with the filter press frame, first springs are fixedly connected between the supports and the supporting frame, and second springs are fixedly connected between the supports and the supporting frame. Grooves are formed in the supports, the supporting frame is connected with limiting blocks in a sliding mode, the upper portions of the limiting blocks are in a sawtooth shape, and the limiting blocks limit movement of the corresponding supports through the grooves; and the two plate pushers are connected to the filter press frame in a sliding manner. The first spring in the supporting frame quickly pushes the bracket to move upwards, so that the filter plate quickly moves to enable a mud cake on the filter plate to fall off, the filter cloth is not subjected to fitting and scraping operation, the integrity of the surface of the filter cloth is ensured, and the service life of the filter cloth is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of filter presses, and particularly relates to a plate-and-frame filter press for sludge treatment. Background Art

[0002] The plate-and-frame filter press is an advanced environmental protection equipment for solid-liquid separation widely used in fields such as sewage treatment, chemical industry, and food processing. Its main function is to compress solid particles (such as sludge) suspended in a liquid into a mud cake by applying pressure and separate the clarified liquid. However, during the actual operation of the plate-and-frame filter press, due to reasons such as too high water content of the mud cake, improper selection of filter cloth material, or insufficient cleaning of the filter cloth, there is often a situation where the mud cake still adheres to the filter cloth when the two filter plates are separated. Existing devices usually use a scraper to fit and squeeze the filter cloth, and the scraper moves on the surface of the filter cloth to comprehensively scrape off the mud cake adsorbed on the surface of the filter cloth. This operation will generate frictional force at the surface where the scraper contacts the filter cloth and the mud cake, increasing the wear of the filter cloth surface, thereby increasing the probability of subsequent mud cake adhering to the filter cloth, reducing the service life of the filter cloth, and increasing the cost of filter cloth maintenance and replacement. Summary of the Invention

[0003] Aiming at the problem that the filter cloth is easily damaged when removing the mud cake adsorbed on the filter cloth, the present invention provides a plate-and-frame filter press for sludge treatment.

[0004] The technical implementation scheme of the present invention is: a plate-and-frame filter press for sludge treatment, including: A filter press frame, on which a plurality of filter plates are arranged, filter cloths are arranged on the filter plates, two brackets are fixedly connected to the filter plates, the brackets are slidably connected with a support frame, the support frame is slidably connected with the filter press frame, a first spring is fixedly connected between the brackets and the support frame, a groove is arranged on the brackets, a limiting block is slidably connected to the support frame, the upper part of the limiting block is serrated, and the limiting block limits the movement of the corresponding bracket through the groove; Two pusher devices, both slidably connected to the filter press frame, and the pusher devices control the movement of the filter plates by pushing the brackets; A control mechanism, arranged on the filter press frame, for actively triggering the corresponding two brackets to drive the filter plates to move upward.

[0005] As a preference of the present invention, the control mechanism includes: The sliding frame is slidably connected to the filter press frame. A support frame is slidably connected to the sliding frame. An electric push rod is arranged on the support frame. The telescopic end of the electric push rod is fixedly connected with a sliding frame. The telescopic end of the electric push rod penetrates through the support frame. The sliding frame is slidably connected with the support frame. A sliding plate is slidably connected to the support frame. The sliding frame is used to fix the filter plate and push the sliding plate. The sliding plate is used to squeeze the serrated part of the limit block to release the limit of the bracket. Two reset components are respectively arranged on the corresponding pusher to actively control a plurality of the brackets on one side of the corresponding pusher to return to the initial position. Two separation components are both arranged on the sliding frame to actively peel off the upper part of the mud cake adsorbed on the filter cloth of the filter plate.

[0006] As a preference of the present invention, the reset component includes: A fixed plate is fixedly connected to the corresponding pusher. Connecting frames are slidably connected to the lower parts of a plurality of the support frames on the same side as the pusher. A sliding block is slidably connected in the connecting frame. Inclined surfaces are arranged on both the upper and lower sides of the sliding block. The fixed plate is used to squeeze the inclined surface on the lower side of the sliding block. A pull rope is fixedly connected to the connecting frame. A connecting block is slidably connected to the upper part of the support frame. A first tension spring is fixedly connected between the connecting block and the support frame. The connecting block is fixedly connected to the pull rope. The connecting block is used to first push the bracket to return to the initial position and then push the limit block to re-limit the bracket.

[0007] As a preference of the present invention, the reset component further includes: Partition plates, the number of which is the same as that of the connecting frames, are respectively slidably connected to the corresponding connecting frames. Second tension springs are fixedly connected between the partition plates and the connecting frames. The partition plates are used to hinder the movement of the sliding blocks. Connecting ropes are fixedly connected to the partition plates. The connecting ropes are fixedly connected to the support frames.

[0008] As a preference of the present invention, a connecting bent rod is fixedly connected to the sliding plate. A support rod is fixedly connected to the lower part of the sliding block. The connecting bent rod is used to squeeze the support rod.

[0009] As a preference of the present invention, an inclined surface is arranged on the lower part of the connecting bent rod, and the lowermost side of the moving range of the connecting bent rod is located above the horizontal plane where the fixed plate is located.

[0010] As a preference of the present invention, the separation component includes: The rotating bent rod is rotatably connected to the sliding frame. The rotating bent rod is rotatably connected with a plurality of connecting plates, and the plurality of connecting plates are jointly rotatably connected with a swing frame. The swing frame is rotatably connected with the sliding frame. A plurality of sliding support plates are slidably connected to the swing frame, and a second spring is fixedly connected between the sliding support plates and the swing frame.

[0011] As a preference of the present invention, the distance between the rotation axes of the two swing frames and the difference between twice the maximum distance from the sliding support plate to the corresponding rotation axis of the swing frame are less than the thickness of the filter plate, so as to make the sliding support plate fit and slide on the filter cloth and insert between the filter cloth and the filter cake. The lowermost side of the sliding support plate is an arc surface.

[0012] As a preference of the present invention, a rack is arranged on the support frame, and a gear is fixedly connected to the rotating bent rod. The gear meshes with the rack.

[0013] As a preference of the present invention, it further includes: Straightening mechanisms, the number of which is the same as that of the filter plates, are respectively arranged in the corresponding filter plates and are used for actively flattening the filter cloth on the filter plates. The straightening mechanisms include: Two limit sliders are both limit slidably connected in the filter plate. The sliding frame is used to squeeze the limit sliders. Four transmission sliders are slidably connected in the filter plate. The transmission sliders are used to flatten the surface of the filter cloth on the filter plate. A third tension spring is fixedly connected between two adjacent transmission sliders. Two inclined surfaces are arranged on the lower side of the limit slider, and the inclined surfaces of the limit slider are used to push the corresponding transmission sliders.

[0014] Compared with the prior art, the present invention has the following advantages: 1. In the present invention, the first spring in the support frame quickly pushes the support upward, so that the filter plate quickly moves to make the filter cake on it fall off, without performing the operation of scraping the filter cloth by fitting, ensuring the integrity of the surface of the filter cloth and prolonging the service life of the filter cloth.

[0015] 2. In the present invention, through the cooperation of the sliding block and the partition plate in the reset assembly, the purpose that the sliding block is misaligned with the fixed plate when not working is achieved, and the separate support and support frame can be reset in time after being triggered, ensuring the continuity and stability of the operation of the present device.

[0016] 3. In the present invention, through the swing of the swing frame driving the sliding support plate in the separation assembly, the sliding support plate fits and slides on the surface of the filter cloth, and the upper part of the filter cake adsorbed on the filter cloth is initially peeled off and inclined, reducing the possibility that the filter cake is still adsorbed on the filter cloth when the filter plate moves quickly.

[0017] 4. In the present invention, through the movement of the transmission slider in the straightening mechanism, a part of the filter cloth is straightened, assisting the sliding support plate to quickly complete the peeling operation of the upper part of the filter cake, and reducing the possibility of residual filter cake on the filter cloth. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present invention; Figure 2 is a three-dimensional structural schematic diagram of the parts at the sliding frame and the support frame of the present invention; Figure 3 is a three-dimensional structural schematic diagram of the parts at the support frame and the push plate device of the present invention; Figure 4 is a three-dimensional structural schematic diagram of the parts at the push plate device and the fixed plate of the present invention; Figure 5 is a three-dimensional structural schematic diagram of the parts at the push plate device and the support frame of the present invention; Figure 6 is a three-dimensional structural schematic diagram of the parts at the support frame and the limit block of the present invention; Figure 7 is a three-dimensional structural schematic diagram of the parts at the limit block and the sliding plate of the present invention; Figure 8 is a three-dimensional structural schematic diagram of the parts at the connecting bent rod and the support rod of the present invention; Figure 9 is a three-dimensional structural schematic diagram of the parts at the sliding block and the pull rope of the present invention; Figure 10 is a three-dimensional structural schematic diagram of the parts at the rack and the gear of the present invention; Figure 11 is a three-dimensional structural schematic diagram of the parts at the rotating bent rod and the connecting plate of the present invention; Figure 12 is a three-dimensional structural schematic diagram of the parts at the rotating bent rod and the gear of the present invention; Figure 13 is a three-dimensional structural schematic diagram of the internal structure of the sliding support plate of the present invention; Figure 14 is a three-dimensional structural schematic diagram of the parts at the limit slider and the transmission slider of the present invention.

[0019] The meanings of the reference numerals in the drawings: 1 - filter press frame, 2 - filter plate, 3 - support frame, 4 - push plate device, 5 - support frame, 6 - limit block, 21 - sliding frame, 22 - support frame, 23 - electric push rod, 24 - sliding frame, 25 - sliding plate, 31 - fixed plate, 32 - connecting frame, 33 - sliding block, 34 - pull rope, 35 - connecting block, 36 - partition plate, 37 - connecting rope, 41 - connecting bent rod, 42 - support rod, 51 - rotating bent rod, 52 - connecting plate, 53 - swinging frame, 54 - sliding support plate, 61 - rack, 62 - gear, 71 - limit slider, 72 - transmission slider. Detailed implementation manners

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the appended Figure 1 - appended Figure 14 drawings. Apparently, 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 skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0021] Embodiment 1: During the operation of the existing plate-and-frame filter press, due to reasons such as too high water content of the filter cake, improper selection of filter cloth material, or insufficient cleaning of the filter cloth, the situation that the filter cake still adheres to the filter cloth when the two filter plates are separated often occurs. The existing mechanism usually uses a scraper to scrape off the filter cake adhering to the filter cloth. This operation will increase the surface roughness of the filter cloth, increase the possibility of the filter cake adhering to the filter cloth, and reduce the service life of the filter cloth.

[0022] A plate-and-frame filter press for sludge treatment, please refer to the appended Figure 1 - appended Figure 7 drawings and the appended Figure 10 drawings, which includes: a filter press frame 1, on which a plurality of filter plates 2 are arranged, filter cloth is arranged on the filter plates 2, two brackets 3 are fixedly connected to the filter plates 2, a support frame 5 is slidably connected to the brackets 3, the support frame 5 is slidably connected to the filter press frame 1, a first spring is fixedly connected between the brackets 3 and the support frame 5, a groove is arranged on the brackets 3, a limiting block 6 is slidably connected to the support frame 5, the upper part of the limiting block 6 is serrated, and the limiting block 6 limits the movement of the corresponding bracket 3 through the groove; two pusher devices 4, both of which are slidably connected to the filter press frame 1, and the pusher devices 4 control the movement of the filter plates 2 by pushing the brackets 3; a control mechanism, which is arranged on the filter press frame 1 and is used to actively trigger the corresponding two brackets 3 to drive the filter plates 2 to move upward. The control mechanism includes: a sliding frame 21, which is slidably connected to the filter press frame 1, a support frame 22 is slidably connected to the sliding frame 21, an electric push rod 23 is arranged on the support frame 22, the telescopic end of the electric push rod 23 is fixedly connected with a sliding frame 24, the telescopic end of the electric push rod 23 penetrates the support frame 22, the sliding frame 24 is slidably connected to the support frame 22, a sliding plate 25 is slidably connected to the support frame 5, the sliding frame 24 is used to fix the filter plates 2 and push the sliding plate 25, and the sliding plate 25 is used to squeeze the serrated part of the limiting block 6 to release the limit of the bracket 3; two reset components, which are respectively arranged on the corresponding pusher devices 4 and are used to actively control the corresponding multiple brackets 3 on one side of the pusher devices 4 to return to the initial position; two separation components, both of which are arranged on the sliding frame 24 and are used to actively peel off the upper part of the filter cake adsorbed on the filter cloth of the filter plates 2.

[0023] In the above solution, it aims to solve the problem that the filter cloth is easily damaged when removing the mud cake adsorbed on the filter cloth by the scraper; a control panel is provided on the filter press frame 1 (the filter press frame 1 is an existing mechanism, and the filter press frame 1 can control multiple filter plates 2 to be pressed together. First, sludge is injected between the multiple filter plates 2, and the sludge is squeezed by the filter plates 2, and the water in the sludge is discharged through the pipes on the lower sides of the multiple filter plates 2, and the multiple filter plates 2 are controlled to separate the sludge into a mud cake and water). The pusher 4, the sliding frame 21, and the electric push rod 23 are all electrically connected to the control panel. The first spring at the bracket 3 is in a compressed state initially. An intelligent monitoring device (an existing mechanism, not shown in the figure) is provided on the pusher 4, which is used to quickly judge whether there is a mud cake adsorbed on the filter cloth on both sides of the filter plate 2. The relative moving distance between the sliding frame 21 and the support frame 22 is equal to the moving distance of the bracket 3 in the support frame 5. The sliding frame 24 moves downward on the support frame 22 to complete the positioning and fixing of the position of one filter plate 2. The serrated part of the limit block 6 is composed of multiple inclined surfaces. The inclined surface of the limit block 6 in contact with the sliding plate 25 is inclined from top to bottom and leftward. Initially, during the movement of the sliding frame 21 driving the support frame 22 and the sliding frame 24, they do not contact any filter plate 2 and bracket 3.

[0024] During the process of using this device to treat sludge, after separating the sludge into a mud cake and water through multiple filter plates 2, the control panel controls the pusher 4 to move on the filter press frame 1. The pusher 4 moves the multiple filter plates 2 from right to left in sequence, and the adjacent two filter plates 2 are separated, and the mud cake between the two filter plates 2 falls naturally. When the intelligent monitoring device on the pusher 4 detects that the mud cake on the filter cloth of a certain filter plate 2 has not fallen, the pusher 4 controls the movement of this filter plate 2 to create a gap between this filter plate 2 and the filter plates 2 on its left and right sides, and then the pusher 4 closes. Subsequently, the control panel controls the movement of the sliding frame 21. When the sliding frame 21 is aligned with the filter plate 2 with a mud cake on the filter cloth, the control panel stops moving the sliding frame 21. Then the control panel starts the electric push rod 23, and the telescopic end of the electric push rod 23 extends and makes the sliding frame 24 move downward. The sliding frame 24 fixes the filter plate 2. Before the sliding frame 24 moves downward to the limit, the sliding frame 24 separates the upper part of the mud cake adsorbed on the filter cloth from the filter cloth through the separation component, making the mud cake mostly fit the filter cloth but its upper part inclined away from the filter cloth. As the sliding frame 24 moves, when the telescopic end of the electric push rod 23 extends completely, the control panel closes the electric push rod 23, and the sliding frame 24 stops moving.

[0025] During the process that the sliding frame 24 is about to move downward to the limit position, the sliding frame 24 contacts and pushes the two sliding plates 25 to move downward. The sliding plates 25 squeeze the serrated parts of the corresponding limit blocks 6, and the limit blocks 6 move to the right. The limit on the support 3 by the limit blocks 6 is released. Both supports 3 move upward under the elastic force of the first springs connected thereto. The two supports 3 drive the filter plate 2 to move upward rapidly. Due to the fixation of the filter plate 2 by the sliding frame 24, the filter plate 2 drives the support frame 22 to move upward synchronously through the sliding frame 24 and the electric push rod 23. The mud cake adsorbed on the filter cloth at the filter plate 2 falls off under the action of inertia. At the same time, if the adsorption force of the mud cake on the filter cloth is large, the inclined part at the upper part of the mud cake will drive the mud cake at its lower part to fall off in turn under the action of inertia (similar to the operation of tearing adhesive tape). The mud cake adsorbed on the filter cloth can be rapidly removed only by inertia, the damage to the filter cloth during mud cake removal is reduced, and the service life of the filter cloth is prolonged. When the support 3 moves upward to the limit in the support frame 5, the filter plate 2 stops moving. Subsequently, the control panel controls the pusher 4 to continue the above operation of moving the filter plate 2 in sequence. During the movement of the pusher 4, the pusher 4 makes the support 3 move downward through the reset assembly and resume the initial limiting state, and the filter plate 2 moves synchronously with the support 3 to resume the initial position. The support frame 22 moves downward to reset under the gravity of the parts connected thereto. At the same time, the control panel controls the telescopic end of the electric push rod 23 to retract, and the sliding frame 24 moves to reset, and the fixation of the filter plate 2 is released. After that, when it is detected again that there is a mud cake adsorbed on the filter cloth of another filter plate 2, the above mud cake cleaning operation is repeated. When all the mud cakes in the device are removed, the device continues to be used to treat the sludge. When the sludge treatment is completed, all the filter cloths of the filter plates 2 are cleaned and waiting for the next use.

[0026] Please refer to the attached Figure 2 、attached Figure 5 、attached Figure 6 and attached Figure 8 - attached Figure 13As shown, the reset assembly includes: a fixing plate 31, fixedly connected to the corresponding pusher 4. A connecting frame 32 is slidably connected to the lower part of each of a plurality of support frames 5 on the same side as the pusher 4. A sliding block 33 is slidably connected within the connecting frame 32. Inclined surfaces are provided on both the upper and lower sides of the sliding block 33. The fixing plate 31 is used to press the inclined surface on the lower side of the sliding block 33. A pull rope 34 is fixedly connected to the connecting frame 32. A connecting block 35 is slidably connected to the upper part of the support frame 5. A first tension spring is fixedly connected between the connecting block 35 and the support frame 5. The connecting block 35 is fixedly connected to the pull rope 34. The connecting block 35 is used to first push the bracket 3 back to its initial position and then push the limiting block 6 to re-limit the bracket 3. The reset assembly further includes: partition plates 36, the number of which is the same as the number of connecting frames 32, and are respectively slidably connected to the corresponding connecting frames 32. A second tension spring is fixedly connected between the partition plate 36 and the connecting frame 32. The partition plate 36 is used to hinder the movement of the sliding block 33. A connecting rope 37 is fixedly connected to the partition plate 36, and the connecting rope 37 is fixedly connected to the support frame 5. A connecting bent rod 41 is fixedly connected to the sliding plate 25. A support rod 42 is fixedly connected to the lower part of the sliding block 33. The connecting bent rod 41 is used to press the support rod 42. An inclined surface is provided at the lower part of the connecting bent rod 41, and the lowermost side of the movement range of the connecting bent rod 41 is above the horizontal plane where the fixing plate 31 is located. The separation assembly includes: a rotating bent rod 51, rotatably connected to the sliding frame 24. The rotating bent rod 51 is rotatably connected to a plurality of connecting plates 52. A plurality of connecting plates 52 together rotatably connect to a swing frame 53. The swing frame 53 is rotatably connected to the sliding frame 24. A plurality of sliding support plates 54 are slidably connected to the swing frame 53. A second spring is fixedly connected between the sliding support plate 54 and the swing frame 53. The distance between the rotation axes of the two swing frames 53 and the difference between twice the maximum distance from the sliding support plate 54 to the corresponding rotation axis of the swing frame 53 is less than the thickness of the filter plate 2, which is used to make the sliding support plate 54 fit and slide along the filter cloth and insert between the filter cloth and the mud cake. The lowermost side of the sliding support plate 54 is an arc surface. A rack 61 is provided on the support frame 22. A gear 62 is fixedly connected to the rotating bent rod 51, and the gear 62 meshes with the rack 61.

[0027] In the above solution, it is aimed to control the quick reset of the bracket 3 at the support frame 5 and at the same time control the peeling of the upper part of the filter cake from the filter cloth. There is damping between the connecting frame 32 and the sliding block 33 (the sliding block 33 in the connecting frame 32 will not move autonomously under the action of its own gravity). The length of the connecting rope 37 is less than the moving distance of the connecting frame 32. When the connecting block 35 is used to push the bracket 3 to reset, the partition plate 36 releases the limit on the sliding block 33. The second tension spring connected to the partition plate 36 is in a stretched state initially. The distance that the connecting bent rod 41 drives the sliding block 33 to move through the support rod 42 is equal to the height of the upper inclined plane of the sliding block 33 projected on the vertical plane. The distance between the two inclined planes on the sliding block 33 gradually decreases from left to right. Through the meshing movement of the rack 61 and the gear 62, the gear 62 forms a mechanism similar to a crank and connecting rod through the rotating bent rod 51, the connecting plate 52 and the swing frame 53 to control the sliding support plate 54 to peel the upper part of the filter cake from the filter cloth and become an inclined state. The second spring at the sliding support plate 54 is used to make the sliding support plate 54 move relative to the swing frame 53 when squeezing the filter cloth (the elastic coefficient of the second spring at the sliding support plate 54 is small. The sliding support plate 54 will move relative to the swing frame 53 only under the obstruction of the filter cloth. The sliding support plate 54 will not press the filter cloth onto the filter plate 2 for hard extrusion and movement, reducing the damage to the filter cloth caused by the sliding of the sliding support plate 54 fitting the filter cloth). The sliding support plate 54 slides along the filter cloth for a certain distance, so that the sliding support plate 54 is inserted between the filter cake and the filter cloth.

[0028] In the process that the sliding frame 24 is about to move downward to the limit position, the sliding frame 24 pushes the sliding plate 25 to move. The sliding plate 25 makes the sliding block 33 move downward through the connecting bent rod 41 and the support rod 42. The partition plate 36 moves leftward under the pulling force of the second tension spring connected to it. The partition plate 36 limits the sliding block 33. The sliding frame 24 fixes the position of the filter plate 2. Taking the rack 61 on the left as an example, when the rack 61 meshes with the gear 62, as the sliding frame 24 moves downward, since the rack 61 is fixed, the gear 62 drives the swing frame 53 to swing counterclockwise (viewed from front to back) through the rotating bent rod 51 and the connecting plate 52. The swing frame 53 drives the sliding support plate 54 to squeeze the filter cloth on the corresponding filter plate 2. The filter cloth obstructs the movement of the sliding support plate 54. The sliding support plate 54 moves toward the swing frame 53 and compresses the second spring inside it. After that, as the sliding frame 24 moves downward and the rotating bent rod 51 rotates, the sliding support plate 54 is inserted between the filter cloth and the filter cake. At the same time, the sliding support plate 54 swings clockwise (viewed from front to back), making the upper part of the filter cake become an inclined state. When the sliding frame 24 moves downward to the limit, the rotating bent rod 51 stops rotating.

[0029] When the bracket 3 moves upward, the mud cake on the filter cloth falls off, and then the control panel controls the push plate device 4 to move left. At the same time, the control panel controls the telescopic end of the electric push rod 23 to slowly shrink, the sliding frame 24 loses contact with the sliding plate 25, and the push plate device 4 drives the fixed plate 31 to move synchronously. The fixed plate 31 contacts and squeezes the inclined surface on the lower side of the sliding block 33. Since the partition plate 36 limits the sliding block 33, the fixed plate 31 drives the connecting frame 32 to move left through the sliding block 33. The connecting frame 32 pulls the connecting block 35 downward through the pull rope 34, and the connecting block 35 stretches the first tension spring connected to it. The connecting block 35 contacts and pushes the bracket 3 to move and reset. The bracket 3 compresses the first spring connected to it. When the bracket 3 moves and resets, the connecting block 35 squeezes the serrated part of the limit block 6. The positioning block 6 is inserted into the groove of the bracket 3, and the bracket 3 returns to the initial limited state. At this time, the connecting rope 37 is tightened, the partition plate 36 stops moving, and the fixed plate 31 drives the connecting frame 32 to continue to move to the left through the sliding block 33. The partition plate 36 loses its limit on the sliding block 33, and the second tension spring connected to the partition plate 36 is stretched. The sliding block 33 is squeezed by the fixed plate 31 and moves upward. The sliding block 33 and the fixed plate 31 lose contact. The height of the upper inclined surface of the sliding block 33 exceeds the partition plate 36. The sliding block 33 clamps the partition plate 36, and the partition plate 36 returns to its initial position. Subsequently, the connecting block 35 moves upward and resets under the tension of the first tension spring connected to it. The connecting block 35 restores the connecting frame 32 to its initial position through the pull rope 34. At this point, all parts in the device have returned to their initial positions.

[0030] Example 2: Based on Example 1, please refer to the attached Figure 3 , Attachment Figure 5 and attached Figure 14 As shown, it also includes: a straightening mechanism, the number of which is the same as the number of filter plates 2, which are respectively arranged in the corresponding filter plates 2 and are used to actively flatten the filter cloth on the filter plate 2. The straightening mechanism includes: two limit sliders 71, both of which are limitedly slidably connected in the filter plate 2, the sliding frame 24 is used to squeeze the limit slider 71, and four transmission sliders 72 are slidably connected in the filter plate 2. The transmission slider 72 is used to flatten the surface of the filter cloth on the filter plate 2, and a third tension spring is fixed between two adjacent transmission sliders 72. Two inclined surfaces are arranged on the lower side of the limit slider 71, and the inclined surfaces of the limit slider 71 are used to push the corresponding transmission slider 72.

[0031] In the above solution, it aims to assist the sliding support plate 54 to quickly separate the connection between the upper part of the mud cake and the filter cloth; the middle parts on both sides of the filter plate 2 are in a sunken state, and the mud cake adsorbed on the filter cloth is opposite to the sunken part on the filter plate 2. When the sliding support plate 54 slides along the filter cloth, it is easy to insert into the sunken part on the filter plate 2, resulting in a situation where part of the mud cake still remains on the filter cloth. By moving the left and right transmission sliders 72 away from each other, only the upper part of the filter cloth is stretched and flattened, assisting the sliding support plate 54 to peel off the mud cake from the upper side of the filter cloth. There are two inclined surfaces at the lower part of the limit slider 71, and the distance between the two inclined surfaces on the limit slider 71 gradually decreases from top to bottom. The limit slider 71 is provided with a groove, and the groove of the limit slider 71 is used to avoid the third tension spring between the two transmission sliders 72.

[0032] During the downward movement of the sliding frame 24, the sliding frame 24 contacts and pushes the limit slider 71 to move downward. The limit slider 71 pushes the two transmission sliders 72 away from each other, and the third tension spring between the two transmission sliders 72 is stretched. The front and rear two transmission sliders 72 on one side of the filter plate 2 flatten the filter cloth. Subsequently, the rack 61 and the gear 62 are engaged, and the sliding support plate 54 performs the peeling operation on the upper part of the mud cake. When the device completes the operation of removing the mud cake, the sliding frame 24 moves upward to reset. The two transmission sliders 72 move closer to each other and reset under the pulling force of the third tension spring connected to them. The transmission slider 72 pushes the limit slider 71 to move and reset through the corresponding inclined surface. By temporarily flattening part of the filter cloth, it assists the sliding support plate 54 to quickly complete the peeling operation on the upper part of the mud cake, reducing the residue of the mud cake on the filter cloth.

[0033] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present invention, so that those skilled in the art in the relevant technical field can understand and utilize the present invention well. As long as it does not deviate from the structure of the invention or exceed the protection scope of the present invention, it should fall within the protection scope of the present invention.

Claims

1. A plate and frame filter press for sludge treatment, characterized in that it comprises: A filter press frame (1), wherein a plurality of filter plates (2) are arranged on the filter press frame (1), filter cloths are arranged on the filter plates (2), two brackets (3) are fixedly connected to the filter plates (2), the brackets (3) are slidably connected to a support frame (5), the support frame (5) is slidably connected to the filter press frame (1), a first spring is fixedly connected between the bracket (3) and the support frame (5), a groove is arranged on the bracket (3), the support frame (5) is slidably connected to a limiting block (6), the upper part of the limiting block (6) is serrated, and the limiting block (6) limits the movement of the corresponding bracket (3) through the groove; Two plate pushers (4) are both slidably connected to the filter press frame (1), and the plate pushers (4) control the movement of the filter plate (2) by pushing the bracket (3); A control mechanism is arranged on the filter press frame (1) and is used to actively trigger the corresponding two brackets (3) to drive the filter plate (2) to move upward.

2. A plate and frame filter press for sludge treatment according to claim 1, characterized in that: The control mechanism comprises: A sliding frame (21) is slidably connected to the filter press frame (1); a support frame (22) is slidably connected to the sliding frame (21); an electric push rod (23) is provided on the support frame (22); a sliding frame (24) is fixedly connected to the telescopic end of the electric push rod (23); the telescopic end of the electric push rod (23) penetrates the support frame (22); the sliding frame (24) is slidably connected to the support frame (22); a sliding plate (25) is slidably connected to the support frame (5); the sliding frame (24) is used to fix the filter plate (2) and push the sliding plate (25); the sliding plate (25) is used to squeeze the serrated portion of the limit block (6) to release the limit of the bracket (3); Two reset components, respectively arranged on the corresponding push plate devices (4), and used to actively control the plurality of brackets (3) on one side of the corresponding push plate device (4) to restore to an initial position; Two separation components are both arranged on the sliding frame (24) and are used to actively peel off the upper part of the mud cake adsorbed on the filter cloth of the filter plate (2).

3. A plate and frame filter press for sludge treatment according to claim 2, characterized in that: The reset component comprises: A fixed plate (31) is fixedly connected to the corresponding push plate device (4); the lower parts of the plurality of support frames (5) on the same side as the push plate device (4) are slidably connected to a connection frame (32); a sliding block (33) is slidably connected inside the connection frame (32); upper and lower sides of the sliding block (33) are provided with inclined surfaces; the fixed plate (31) is used to squeeze the inclined surface on the lower side of the sliding block (33); the connection frame (32) is fixedly connected to a pull rope (34); the upper part of the support frame (5) is slidably connected to a connection block (35); a first tension spring is fixedly connected between the connection block (35) and the support frame (5); the connection block (35) is fixedly connected to the pull rope (34); the connection block (35) is used to first push the support (3) to restore the initial position, and then push the limit block (6) to limit the support (3) again.

4. A plate and frame filter press for sludge treatment according to claim 3, characterized in that: The reset component also includes: The number of partition plates (36) is the same as the number of the connection frames (32), and they are slidably connected to the corresponding connection frames (32). A second tension spring is fixedly connected between the partition plates (36) and the connection frames (32). The partition plates (36) are used to hinder the movement of the sliding block (33). The partition plates (36) are fixedly connected to a connection rope (37), and the connection rope (37) is fixedly connected to the support frame (5).

5. The plate-and-frame filter press for sludge treatment according to claim 4, characterized in that: A connecting bent rod (41) is fixedly connected to the sliding plate (25), a supporting rod (42) is fixedly connected to the lower part of the sliding block (33), and the connecting bent rod (41) is used to press the supporting rod (42).

6. A plate and frame filter press for sludge treatment according to claim 5, characterized in that: The lower part of the connecting bent rod (41) is provided with an inclined surface, and the lowermost side of the moving range of the connecting bent rod (41) is located above the horizontal plane where the fixing plate (31) is located.

7. A plate and frame filter press for sludge treatment according to claim 6, characterized in that: The separation component comprises: A rotating bent rod (51) is rotatably connected to the sliding frame (24); the rotating bent rod (51) is rotatably connected to a plurality of connecting plates (52); the plurality of connecting plates (52) are rotatably connected to a swing frame (53); the swing frame (53) is rotatably connected to the sliding frame (24); a plurality of sliding support plates (54) are slidably connected to the swing frame (53); a second spring is fixedly connected between the sliding support plate (54) and the swing frame (53).

8. The plate-and-frame filter press for sludge treatment according to claim 7, characterized in that: The difference between the spacing between the rotation axes of the two swing frames (53) and twice the maximum distance from the sliding support plate (54) to the corresponding rotation axis of the swing frame (53) is less than the thickness of the filter plate (2), so that the sliding support plate (54) can slide against the filter cloth and be inserted between the filter cloth and the mud cake, and the lowermost side of the sliding support plate (54) is an arc-shaped surface.

9. A plate and frame filter press for sludge treatment according to claim 8, characterized in that: A rack (61) is provided on the support frame (22), a gear (62) is fixedly connected to the rotating bent rod (51), and the gear (62) is meshed with the rack (61).

10. A plate-and-frame filter press for sludge treatment according to claim 9, characterized in that include: The straightening mechanisms, the number of which is the same as the number of the filter plates (2), are respectively arranged in the corresponding filter plates (2) and are used to actively flatten the filter cloth on the filter plates (2). The straightening mechanisms include: Two limit sliders (71) are both limit-slidingly connected in the filter plate (2); the sliding frame (24) is used to squeeze the limit slider (71); four transmission sliders (72) are slidably connected in the filter plate (2); the transmission sliders (72) are used to flatten the surface of the filter cloth on the filter plate (2); a third tension spring is fixedly connected between two adjacent transmission sliders (72); two inclined surfaces are provided on the lower side of the limit slider (71); the inclined surfaces of the limit slider (71) are used to push the corresponding transmission sliders (72).

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