A belt filter deviation rectifying device and method

Abstract

The application discloses a belt filter press deviation rectifying device and method, and belongs to the technical field of auxiliary equipment of belt filter press.The device comprises a rack, a deviation rectifying roller, a detection rod, a proportional valve, a control rod, a displacement conversion assembly and a deviation rectifying cylinder, and each component is installed on the rack; the detection end of the detection rod is attached to the edge of the filter belt, and converts the filter belt deviation into the displacement of the detection rod; the displacement conversion assembly connects the detection rod and the control rod, and realizes accurate displacement transmission; the proportional valve is matched with a tapered valve core through a V-shaped throttling groove, realizes linear regulation of the air inlet flow, drives the deviation rectifying cylinder to extend and retract, and adjusts the roller seat of the deviation rectifying roller.The deviation rectifying method comprises pre-tightening detection, displacement conversion, deviation rectifying action and reset emergency steps, realizes self-adaptive deviation rectifying of the filter belt "small deviation slow rectification and large deviation fast rectification", and can accurately capture slight deviation, avoids secondary deviation of the filter belt, is stable in operation, has high universality, and can guarantee continuous operation of the belt filter press.

Description

Technical Field

[0001] This invention relates to the field of sludge treatment technology, specifically to a belt filter press alignment device and method. Background Technology

[0002] During operation, belt filter presses are prone to belt misalignment due to uneven material distribution, roller parallelism error, and uneven belt tension.

[0003] Currently, most belt filter presses use photoelectric induction or mechanical baffle triggering methods for their belt alignment devices. These devices often employ on / off control of the alignment amount, resulting in overly abrupt belt misalignment and a "snake-like" belt movement with poor stability. Specifically: The mechanical baffle triggering method causes the filter belt edge to directly impact the shift fork, pushing the pneumatic reversing valve. This structure has a large impact force, and the filter belt burrs usually show severe wear within 3 months.

[0004] The photoelectric induction triggering method detects deviation through a photoelectric switch and controls the cylinder with a solenoid valve. However, this method is prone to false alarms in filter press workshops with high dust and humidity, and requires a complex electrical control system (PLC), making it unsuitable for explosion-proof environments.

[0005] Therefore, a purely mechanical correction device with high detection sensitivity, accurate correction, and simple structure is needed, which is the key to solving the shortcomings of existing technologies. Summary of the Invention

[0006] The purpose of this invention is to provide a belt filter press alignment device and method to solve the technical problems of large alignment impact, easy wear of filter belt and easy failure in the prior art.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: A belt filter press alignment device includes: a frame for supporting and fixing various functional components; an alignment roller disposed on the frame, the roller surface of which is in contact with the filter belt of the filter press, and both ends of the alignment roller can move synchronously or asynchronously in a vertical plane to adjust the tension of the corresponding side edge of the filter belt; a detection rod horizontally disposed on the frame, the detection rod being slidably connected to the frame, and the detection end of the detection rod always in contact with the edge of the filter belt, so that the offset of the filter belt can be converted into the displacement of the detection rod along its own axis; and a proportional valve disposed on the frame, the valve chamber of which has a valve core capable of reciprocating along the flow channel direction to adjust the flow channel. Flow area; control rod, horizontally mounted on the frame, the control rod being slidably connected to the frame and positioned along the displacement direction of the valve core, passing through the proportional valve and connecting to the valve core to drive the valve core to move; displacement conversion assembly, mounted on the frame, connected to both the detection rod and the control rod to convert the displacement of the detection rod into the displacement of the control rod, thereby converting the offset of the filter belt into the displacement of the valve core within the proportional valve; correction cylinder, mounted on the frame, the inlet of the correction cylinder connected to the outlet of the proportional valve, the piston rod of the correction cylinder connected to and driving the roller seat of the correction roller.

[0008] Furthermore, the detection rod is arranged perpendicularly to the edge of the filter belt, and the detection end of the detection rod is provided with a roller, which makes rolling contact with the filter belt.

[0009] Furthermore, the edge of the roller has a groove that surrounds itself along a direction perpendicular to its own axis of rotation. The height of the groove is matched with the thickness of the filter belt. The position of the roller is set so that the filter belt can be stuck in the groove and roll in contact with the bottom of the groove.

[0010] Furthermore, the detection rod is an elastic telescopic structure, the roller is disposed at the end of the telescopic part of the detection rod, and the telescopic part is connected to the valve core via the displacement conversion assembly; wherein, the telescopic part includes a rod body and a sleeve sleeved outside the rod body, the rod body and the sleeve are clearance-fitted, the outer wall of the sleeve is provided with a locking cavity communicating with its own interior, the rod body is provided with a first rack part on the side facing the locking cavity, the locking cavity is provided with a tooth block that can reciprocate in a direction perpendicular to the first rack part, the tooth block can mesh with the first rack part, a bolt is threadedly connected in the locking cavity along the moving direction of the tooth block, the head of the bolt is located outside the locking cavity, the tooth block is provided with a rotating hole on the side facing the bolt along its own moving direction, the end of the bolt is rotatably engaged with the rotating hole, and the bottom of the rotating hole extends radially outward with a limit groove, the end of the bolt is provided with a limit plate that is stuck in the limit groove to prevent the bolt and the tooth block from disengaging.

[0011] Furthermore, the displacement conversion assembly includes a first gear and a second gear, which are coaxially arranged and rotate synchronously; the telescopic part of the control rod and the drive rod are both provided with a second rack, which meshes with the first gear and the second gear respectively.

[0012] Furthermore, the end of the control rod connected to the valve core is provided with a push rod, which contacts the valve core; wherein, the flow channel is provided with a V-shaped throttling groove at the position in contact with the valve core, the end of the valve core facing the flow channel is a conical head that matches it, and the width of the V-shaped throttling groove gradually increases along the axial direction of the valve core, so that the throttling area is linearly related to the displacement of the valve core.

[0013] Furthermore, the frame is provided with guide sleeves that are respectively fitted onto the detection rod and / or the control rod, for providing a preset static friction torque that prevents the detection rod and / or the control rod from swinging freely.

[0014] Furthermore, the frame is symmetrically provided with two sets of sliding grooves in the vertical direction corresponding to the installation position of the roller seat. Each side wall of the roller seat is provided with a limiting block for each set of sliding grooves. The limiting block slides with the sliding groove and can move along the sliding groove. Limiting posts are provided at both ends of the two sets of sliding grooves to limit the vertical movement of the roller seat.

[0015] Furthermore, a manual directional valve is connected in parallel across the proportional valve to manually control the correction cylinder to reset the correction roller in the event of pneumatic control failure.

[0016] To address the aforementioned technical problems, the present invention further provides the following technical solution: A belt filter press alignment method, based on the aforementioned belt filter press alignment device, includes the following steps: S1. Pre-tightening contact and trend detection: The detection end of the detection rod is pre-tightened to the edge of the filter belt. When the filter belt deviates slightly, the edge of the filter belt pushes the detection rod to move along its own axis. S2, Mechanical Displacement Conversion: The linear movement of the detection rod is converted into the linear movement of the control rod along its own axis by the displacement conversion component; S3. Correction action: The control lever pushes the valve core of the proportional valve to move, which drives the correction cylinder. The correction cylinder drives the roller seat at the corresponding end of the correction roller to move along the slide groove, adjusting the tension of the filter belt on the side that is off track, so that the filter belt gradually returns to the correct position. S4. Static Zone Reset: When the filter belt returns to its correct position, the detection rod loses the thrust from the edge of the filter belt. Under the elastic force of the detection rod's own elastic telescopic structure, the detection rod returns to its original position synchronously. After conversion by the displacement conversion component, the control rod cancels the thrust applied to the valve core, the valve core resets, the proportional valve stops supplying flow to the correction cylinder, and the correction action stops.

[0017] Compared with the prior art, the present invention has the following advantages: The displacement conversion component enables precise displacement conversion between the detection rod and the control rod, converting the filter belt deviation into the displacement corresponding to the proportional valve core. The proportional valve uses a V-shaped throttling groove and a conical valve core to achieve linear flow regulation, thereby ensuring smooth and controllable correction action and preventing secondary deviation of the filter belt.

[0018] The detection rod uses rollers to make rolling contact with the filter belt, resulting in low friction loss. The rollers are also equipped with grooves to prevent detachment, which can detect slight deviations in the filter belt. At the same time, the elastic telescopic structure can achieve automatic reset, ensuring the timeliness and stability of the detection.

[0019] It is also equipped with a manual reversing valve, which can manually control the correction roller to reset in case of pneumatic control system failure, avoid equipment downtime and ensure production continuity. Attached Figure Description

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a belt filter press alignment device; Figure 2 This is a schematic diagram of the structure at the detection rod. Figure 3This is a structural diagram of the control lever. Figure 4 This is a schematic diagram of the internal valve core of a proportional valve. Figure 5 This is a schematic diagram of the roller structure; Figure 6 This is a schematic diagram of the internal structure of the locking cavity; Figure 7 This is the control circuit diagram for the directional valve.

[0022] The labels in the diagram represent the following: 1-Frame, 2-Correction roller, 3-Detection rod, 4-Proportional valve, 5-Displacement conversion assembly, 6-Correction cylinder; 11-Guide sleeve, 21-Roller seat, 22-Slide groove, 23-Limiting post; 31-Roller, 32-Groove, 33-Telescopic part, 34-Rod, 35-Sleeve, 36-Locking cavity, 361-First rack part, 362-Tooth block, 363-Bolt, 364-Rotating hole, 365-Limiting groove, 366-Limiting plate; 41-Flow channel, 42-V-shaped throttling groove, 43-Conical head; 51-First gear, 52-Second gear, 53-Control lever, 54-Second rack section, 55-Push rod. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] like Figure 1 As shown, this invention provides an implementation method for a belt filter press belt deviation correction device. It mainly uses a detection rod 3 to capture the belt deviation status in real time, and a displacement conversion component 5 to achieve precise displacement transmission and conversion between the detection rod 3 and the control rod 53, synchronously converting the actual deviation of the filter belt into the corresponding displacement of the proportional valve 4's valve core. Simultaneously, the proportional valve 4 employs a precise matching structure of a V-shaped throttling groove 42 and a conical valve core to achieve linear adjustment of the airflow. Furthermore, the proportional valve 4 drives the deviation correction cylinder 6 to smoothly extend and retract, precisely adjusting the roller seat 21 of the deviation correction roller 2. Ultimately, this achieves stable and efficient belt deviation correction, effectively preventing secondary deviation caused by excessive movement during the correction process, and ensuring the continuous and stable operation of the belt filter press.

[0025] Specifically, all relevant functional components are fixedly mounted on frame 1. Frame 1 adopts a frame-type welded structure, is made of high-strength steel, and undergoes aging treatment to eliminate welding stress, possessing sufficient rigidity, stability, and vibration resistance. It can effectively withstand various forces generated during the alignment process, preventing deformation of frame 1 from affecting alignment accuracy. In this embodiment, the frame 1 can directly use the original frame of the belt filter press, eliminating the need for an additional independent frame, reducing equipment modification costs, and ensuring the coaxiality and positional accuracy of the component installation.

[0026] The alignment roller 2 is horizontally mounted on the frame 1. Its roller surface is in close contact with the surface of the filter belt of the belt filter press. During operation, it can apply a uniform clamping force to the filter belt to ensure that the filter belt does not slip during operation.

[0027] The two ends of the correction roller 2 are connected to the roller seat 21 through bearings. The roller seat 21 and the frame 1 are in sliding fit, so that the two ends of the correction roller 2 can move synchronously or asynchronously in the vertical plane to adjust the external force applied to the filter belt by the corresponding end of the correction roller 2. When the filter belt deviates to one side, the corresponding end of the correction roller 2 applies an external force to the filter belt to increase the tension of the filter belt on that side and uses the tension difference of the filter belt to push the filter belt back to the correct position.

[0028] The detection rod 3 is horizontally set on the frame 1. The detection rod 3 is slidably connected to the frame 1, and the detection end of the detection rod 3 is always in contact with the edge of the filter belt, ensuring that any deviation of the filter belt can be transmitted to the detection rod 3 in a timely manner, and accurately converting the lateral deviation of the filter belt into the linear displacement of the detection rod 3 along its own axis.

[0029] The proportional valve 4 is mounted on the frame 1 and is a pneumatically controlled proportional valve. Its valve chamber has a valve core that can reciprocate along the direction of the flow channel 41 to adjust the flow area of ​​the flow channel 41, thereby controlling the air intake flow and speed of the correction cylinder 6 and achieving precise control of the correction action.

[0030] The control lever 53 is horizontally mounted on the frame 1. The control lever 53 is slidably connected to the frame 1 and is positioned along the displacement direction of the valve core. It passes through the proportional valve 4 and is connected to the valve core to drive the valve core to move.

[0031] The displacement conversion component 5 is mounted on the frame 1. The displacement conversion component 5 is connected to the detection rod 3 and the control rod 53 respectively, so as to convert the displacement of the detection rod 3 into the displacement of the control rod 53, and then convert the offset of the filter belt into the displacement of the valve core inside the proportional valve 4.

[0032] The correction cylinder 6 is mounted on the frame 1. It is a double-acting cylinder and there are two sets of it, which correspond to the two ends of the correction roller 2 respectively. The air inlet of each correction cylinder 6 is connected to the air outlet of the proportional valve 4 through an air pipe. The piston rod of the correction cylinder 6 is connected through a flange and drives the roller seat 21 of the correction roller 2 to move.

[0033] like Figure 2 As shown, this embodiment provides the following examples for the detection rod 3.

[0034] The detection rod 3 is set perpendicular to the edge of the filter belt, and a roller 31 is installed at its detection end. The roller 31 is made of high-strength polyurethane material in one piece. This material not only has good elasticity and wear resistance, but also has excellent anti-aging and anti-corrosion properties. It can achieve flexible rolling contact with the filter belt, minimize friction loss between the roller and the filter belt, effectively avoid scratching the surface of the filter belt, and ensure the stability of the detection process.

[0035] Furthermore, such as Figure 4 As shown, the edge of the roller 31 has a groove 32 that surrounds itself along the direction perpendicular to its own axis of rotation. The cross-section of the groove 32 is arc-shaped. The height of the groove 32 is matched with the thickness of the filter belt with a clearance of 0.05-0.1mm. The position of the roller 31 is set so that the filter belt can be stuck in the groove 32 and roll in contact with the bottom of the groove 32.

[0036] This structure effectively prevents the roller 31 from detaching from the edge of the filter belt, ensuring the continuity and accuracy of the detection signal. On the other hand, it also limits the edge of the filter belt, preventing it from curling or deforming due to force, ensuring that the offset of the filter belt can be accurately transmitted to the detection rod 3, providing a reliable basis for the precise control of subsequent correction actions.

[0037] To ensure that roller 31 remains in close contact with the edge of the filter belt during equipment operation and automatically resets after the filter belt returns to its normal position, such as... Figure 5 As shown, this embodiment also provides the following examples.

[0038] The detection rod 3 has an elastic telescopic structure, with a roller 31 located at the end of the telescopic part 33 of the detection rod 3. The telescopic part 33 is connected to the valve core via the displacement conversion component 5. The elastic telescopic structure of the detection rod 3 can store a certain amount of elastic potential energy. When the filter belt deviates and pushes the roller 31 to move, the telescopic part 33 undergoes elastic deformation. When the filter belt returns to its correct position, the elastic potential energy is released, causing the detection rod 3 to automatically reset. This eliminates the need for an additional reset drive component, simplifying the equipment structure and reducing maintenance costs.

[0039] During long-term operation of the equipment, the filter belt may be slightly shifted due to the cumulative effects of various factors such as filter belt wear, equipment vibration, and material adhesion. In order to ensure that the roller 31 always maintains close contact with the filter belt, the position of the roller 31 needs to be flexibly fine-tuned. Therefore, this embodiment also provides the following examples.

[0040] The telescopic part 33 includes a rod 34 and a sleeve 35 sleeved outside the rod 34. The rod 34 and the sleeve 35 are fitted with a clearance fit. The outer wall of the sleeve 35 is provided with a locking cavity 36 that communicates with its own interior. The locking cavity 36 is a rectangular cavity. A first rack portion 361 is integrally formed on the side of the rod 34 facing the locking cavity 36. The tooth pitch of the first rack portion 361 is 1 mm and the tooth depth is 0.5 mm. The locking cavity 36 is provided with a tooth block 362 that can reciprocate in a direction perpendicular to the first rack portion 361. The tooth shape of the tooth block 362 meshes with the first rack portion 361, which can realize the relative fixation of the rod 34 and the sleeve 35, thereby adjusting the telescopic length of the telescopic part 33 of the detection rod 3.

[0041] A bolt 363 is threadedly connected inside the locking cavity 36 along the moving direction of the toothed block 362. The bolt 363 is an internal hex bolt, and its head is located outside the locking cavity 36 for easy adjustment by the operator. A rotating hole 364 is opened on the side of the toothed block 362 facing the bolt 363 along its own moving direction. The rotating hole 364 is a blind hole. The end of the bolt 363 is rotatably engaged with the rotating hole 364. The bottom of the rotating hole 364 extends radially outward with a limiting groove 365. The limiting groove 365 is an annular groove. A limiting plate 366 is welded to the end of the bolt 363 and is stuck in the limiting groove 365. The limiting plate 366 is a circular plate with a diameter larger than the diameter of the rotating hole 364. It is used to prevent the bolt 363 and the toothed block 362 from disengaging and to ensure the stability of the adjustment process.

[0042] By rotating the bolt 363, the toothed block 362 can be moved in a direction perpendicular to the rod 34, realizing the engagement or disengagement of the toothed block 362 with the first rack portion 361. When the toothed block 362 disengages from the first rack portion 361, the rod 34 can be pulled to move within the sleeve 35, adjusting the extension length of the detection rod 3, so that the roller 31 is precisely fitted with the edge of the filter belt. After adjustment, the bolt 363 is rotated in the opposite direction, so that the toothed block 362 is tightly engaged with the first rack portion 361, fixing the length of the detection rod 3. This adjustment structure can not only be flexibly fine-tuned according to the actual operation of the filter belt, but also adapt to filter belts of different widths, improving the versatility and applicability of the device.

[0043] For displacement conversion component 5, such as Figure 2 and Figure 3 As shown, this embodiment provides the following examples.

[0044] The displacement conversion component 5 includes a first gear 51 and a second gear 52. The first gear 51 and the second gear 52 are coaxially arranged and fixed on the same rotating shaft by a key connection to achieve synchronous rotation. The rotating shaft is mounted on the frame 1 by bearings to ensure smooth rotation without jamming.

[0045] The telescopic portion of the control lever 53 and the telescopic portion of the detection lever 3 are both integrally formed with a second rack portion 54; wherein, the second rack portion 54 on the detection lever 3 meshes with the first gear 51, and the second rack portion 54 on the control lever 53 meshes with the second gear 52.

[0046] When the filter belt deviates and pushes the detection rod 3 to move along its own axis, the second rack portion 54 on the detection rod 3 drives the first gear 51 to rotate. Since the first gear 51 and the second gear 52 rotate synchronously on the same axis, the second gear 52 rotates synchronously as well, and drives the second rack portion 54 on the control rod 53 to move through the teeth on its surface, thereby driving the control rod 53 to move along its own axis, so as to achieve accurate transmission of displacement.

[0047] Furthermore, by reasonably setting the gear ratio of the first gear 51 and the second gear 52, the displacement transmission ratio of the detection rod 3 and the control rod 53 can be flexibly adjusted to adapt to different correction accuracy requirements: when higher correction accuracy is required, the gear ratio can be increased so that the displacement of the control rod 53 is greater than the displacement of the detection rod 3, thereby amplifying the adjustment of the deviation amount; when the filter belt has good running stability and the correction accuracy requirement is low, the gear ratio can be reduced to simplify the adjustment process.

[0048] In this embodiment, the gear ratio of the first gear 51 and the second gear 52 is preferably 4:1 to 8:1. This ratio range can take into account both the correction accuracy and the adjustment response speed, and is suitable for most belt filter press operating scenarios.

[0049] Regarding the flow regulation method of proportional valve 4, such as Figure 4 As shown, this embodiment also provides the following examples.

[0050] The end of the control lever 53 connected to the valve core is provided with a push rod 55. The push rod 55 contacts the valve core, and the contact part adopts a spherical design to reduce contact friction and avoid displacement transmission lag or deviation due to excessive friction. This ensures that the displacement of the control lever 53 can be accurately and timely transmitted to the valve core, thus guaranteeing the accuracy of flow regulation.

[0051] The proportional valve 4 has a V-shaped throttling groove 42 in the flow channel 41 facing the position where it contacts the valve core. The opening of the V-shaped throttling groove 42 faces the valve core, and its width gradually increases along the axial direction of the valve core. The end of the valve core facing the flow channel 41 is designed as a conical head 43 that matches it. The taper of the conical head 43 is completely consistent with the inclination angle of the V-shaped throttling groove 42, forming a precise fit.

[0052] This structure ensures a strict linear relationship between the throttling area of ​​the proportional valve 4 and the displacement of the valve core: the greater the movement distance of the valve core, the larger the flow area of ​​the V-shaped throttling groove 42, and the greater the compressed air flow rate output by the proportional valve 4 to the correction cylinder 6, resulting in a faster extension and retraction speed of the correction cylinder 6; conversely, the smaller the movement distance of the valve core, the smaller the flow area, and the slower the correction speed. This linear adjustment method achieves smooth and controllable correction action, effectively preventing secondary belt misalignment due to excessively fast correction speed, while also preventing exacerbated belt misalignment due to excessively slow correction speed, thus ensuring the stability of the correction effect.

[0053] Furthermore, depending on the actual movement of the detection rod 3 and the control rod 53, a guide sleeve 11 can be added to provide a preset static friction torque that prevents the detection rod 3 or the control rod 53 from swinging freely.

[0054] Taking the detection rod 3 as an example, the guide sleeve 11 is made of copper with a smooth inner wall and is fitted with the detection rod 3 with a clearance. It can not only provide guidance for the detection rod 3, but also provide a preset static friction torque to prevent the detection rod 3 from swinging freely, so as to avoid the detection rod 3 from malfunctioning due to vibration and ensure detection accuracy.

[0055] Regarding the moving structure of the guide roller 2 roller seat 21, such as Figure 1 As shown, this embodiment provides the following examples.

[0056] Two sets of sliding grooves 22 are symmetrically arranged in the vertical direction at the mounting positions of the roller seat 21 on the frame 1. The sliding grooves 22 adopt a rectangular groove structure, and the groove walls are hardened to improve wear resistance. Each set of sliding grooves 22 has an integrally formed limit block on both sides of the roller seat 21. The limit block and the sliding groove 22 are fitted with a clearance of 0.1-0.2mm, which ensures that the limit block can move smoothly along the sliding groove 22 and avoids shaking during the movement.

[0057] Meanwhile, limit posts 23 are welded between the two ends of the two sets of chutes 22. The limit posts 23 are made of circular steel columns and their height is higher than the opening of the chutes 22. They are used to limit the up and down movement of the roller seat 21 and prevent the roller seat 21 from moving too much, which would cause the filter belt to be overstretched or damaged. The lower limit posts 23 are fitted with polyurethane buffer sleeves.

[0058] Furthermore, to prevent equipment shutdown in case of pneumatic control system failure, such as Figure 7 As shown, this device also includes a manual directional valve connected in parallel to both ends of the proportional valve 4. The manual directional valve is a two-position five-way manual valve, which is fixedly installed on the frame 1. Its air inlet is connected to the air source, and its air outlet is connected to the air inlet of the correction cylinder 6. When the pneumatic control system (proportional valve 4, displacement conversion component 5, etc.) fails, the operator can manually operate the directional valve to control the extension and retraction of the correction cylinder 6, so that the correction roller 2 is reset, ensuring production continuity.

[0059] This embodiment also provides a belt filter press alignment method, based on the above-mentioned belt filter press alignment device, including the following steps: 1. Pre-tightening contact and trend detection First, adjust the telescopic length of the detection rod according to the width and position of the filter belt: rotate the bolt to drive the toothed block to disengage from the first rack, pull the rod body to move inside the sleeve, so that the detection end (roller) of the detection rod is aligned with the edge of the filter belt, and then rotate the bolt in the opposite direction to make the toothed block mesh with the first rack, thus fixing the length of the detection rod.

[0060] Before starting the belt filter press, ensure that the groove of the roller is engaged with the edge of the filter belt and makes rolling contact with the bottom of the groove of the filter belt. This will achieve a pre-tight fit between the detection rod and the edge of the filter belt. The pre-tightening force is achieved by adjusting the elastic telescopic structure of the detection rod, ensuring that the roller fits tightly with the filter belt without damaging it.

[0061] When the belt filter press is working, the filter belt runs in the preset direction. If the filter belt deviates slightly (deviance ≥ 0.1mm), the edge of the filter belt will push the roller of the detection rod, causing the telescopic part of the detection rod to move linearly along its own axis. The direction of movement is the same as the direction of the filter belt deviation.

[0062] S2, Mechanical Displacement Conversion The telescopic part of the detection rod moves linearly along its own axis, which is converted into the linear movement of the control rod along its own axis by the displacement conversion component: When the telescopic part of the detection rod moves, the second rack part on its surface drives the first gear to rotate. Since the first gear and the second gear rotate synchronously on the same axis, the second gear rotates accordingly, and drives the second rack part on the control rod to move through the teeth on its surface, thereby driving the control rod to move along its own axis, realizing the precise transmission of displacement.

[0063] The offset of the filter belt, i.e. the movement of the detection rod, is S1. Then the movement of the control rod, i.e. the movement of the valve core, is S2 = S1 * (first gear radius / second gear radius).

[0064] By reasonably setting the gear ratio of the first gear and the second gear, the ratio between S2 and S1 can be flexibly adjusted to adapt to different correction accuracy requirements and ensure the accuracy of the correction action.

[0065] S3, Correction Action When the control lever moves along its own axis, the spherical push rod at its end pushes the valve core of the proportional valve to move along the flow channel. Since the conical head of the valve core and the V-shaped throttling groove of the proportional valve are precisely matched, the displacement of the valve core and the flow area of ​​the V-shaped throttling groove have a strict linear relationship: the greater the movement distance of the valve core, the greater the flow area of ​​the V-shaped throttling groove, and the greater the compressed air flow rate output by the proportional valve to the correction cylinder; conversely, the smaller the movement distance of the valve core, the smaller the flow area, and the smaller the output flow rate.

[0066] The output flow rate Q of compressed air can be calculated using the formula Q=Cv×ΔP×S2 (where Cv is the flow coefficient of the proportional valve, which is determined by the structural parameters of the proportional valve; ΔP is the pressure difference between the inlet and outlet of the proportional valve, which is a constant value). It can be seen from the formula that the output flow rate Q is proportional to the displacement S2 of the valve core, that is, proportional to the offset S1 of the filter belt, thus achieving linear regulation of the flow rate.

[0067] Compressed air, after being output through a proportional valve, enters the cavity of the correction cylinder through a high-pressure air pipe, pushing the piston rod to extend and retract. The piston rod, through a flange, drives the correction roller seat to move smoothly along the slide groove on the frame. When compressed air enters the rodless chamber of the double-acting cylinder, it generates a thrust F=P×A (where P is the pressure of the compressed air and A is the effective area of ​​the piston), pushing the correction roller to move and correct the deviation at a speed V=Q / A. Since the flow rate Q is proportional to the deviation S1, the correction speed V is also proportional to the deviation S1, achieving an adaptive correction effect of "slow correction for small deviations and fast correction for large deviations," ensuring smooth and accurate correction.

[0068] The specific correction process is as follows: If the filter belt deviates to the left, the piston rod of the left-side correction cylinder extends, driving the left-side roller seat to move upward along the slide groove, increasing the tension of the left-side filter belt; at the same time, the right-side correction cylinder remains stationary or slightly contracts, keeping the tension of the right-side filter belt constant or slightly decreasing. Under the action of the tension difference between the two sides, the filter belt gradually returns to the right. Conversely, if the filter belt deviates to the right, the piston rod of the right-side correction cylinder extends, driving the right-side roller seat to move upward, increasing the tension of the right-side filter belt; the left-side correction cylinder remains stationary or slightly contracts, and under the action of the tension difference, the filter belt gradually returns to the left. The entire correction process is smooth and controllable, without impact or jerking, effectively avoiding secondary deviation of the filter belt due to excessive correction speed.

[0069] S4, Static Zone Reset As the filter belt gradually returns to its correct position under the corrective action, the edge of the filter belt disengages from the roller of the detection rod, and the detection rod loses the horizontal thrust of the filter belt edge. At this time, the elastic telescopic structure of the detection rod releases the stored elastic potential energy. Under the action of the elastic force, the telescopic part of the detection rod moves in the opposite direction along its own axis and synchronously returns to the initial preset position.

[0070] When the detection rod returns to its original position, the displacement conversion component drives the control rod to move in the opposite direction. The control rod cancels the thrust applied to the proportional valve core. Under the elastic force of its own return spring, the valve core moves in the opposite direction along the flow channel and returns to its initial position. At this time, the V-shaped throttling groove of the proportional valve closes, stops supplying compressed air to the correction cylinder, the piston rod of the correction cylinder stops extending and retracting, the roller seat remains in the current position, the correction action officially stops, and the filter belt maintains uniform and stable operation on the preset running trajectory.

[0071] If the pneumatic control system malfunctions (e.g., a blocked proportional valve, a stuck displacement conversion component, a broken detection rod, or a detached roller), preventing the automatic alignment function from working properly, the operator can immediately manually operate the handle of the manual reversing valve. This manual control circuit will then extend or retract the piston rod of the alignment cylinder, resetting the alignment roller to its initial position. This prevents equipment downtime, ensures continuous operation of the belt filter press, and minimizes production losses caused by the malfunction. During equipment shutdown for maintenance, the faulty components of the pneumatic control system can be repaired or replaced to restore the automatic alignment function.

[0072] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A belt filter press alignment device, characterized in that, include: The rack (1) is used to support and fix the various functional components; The correction roller (2) is mounted on the frame (1). The roller surface of the correction roller (2) is in contact with the filter belt of the filter press and applies external force to the filter belt. The two ends of the correction roller (2) can move synchronously or asynchronously in the vertical plane to adjust the external force applied to the filter belt by the corresponding end of the correction roller (2). The detection rod (3) is horizontally set on the frame (1). The detection rod (3) is slidably connected to the frame (1), and the detection end of the detection rod (3) is always in contact with the edge of the filter belt, so that the offset of the filter belt can be converted into the displacement of the detection rod (3) along its own axis. A proportional valve (4) is provided on the frame (1). The valve chamber of the proportional valve (4) has a valve core that can reciprocate along the direction of the flow channel (41) to adjust the flow area of ​​the flow channel (41). The control lever (53) is horizontally mounted on the frame (1). The control lever (53) is slidably connected to the frame (1). The control lever (53) is mounted along the displacement direction of the valve core and passes through the proportional valve (4) to connect with the valve core so as to drive the valve core to move. Displacement conversion component (5) is disposed on the frame (1). The displacement conversion component (5) is connected to the detection rod (3) and the control rod (53) respectively, so as to convert the displacement of the detection rod (3) into the displacement of the control rod (53), and then convert the offset of the filter belt into the displacement of the valve core inside the proportional valve (4). The correction cylinder (6) is mounted on the frame (1). The air inlet of the correction cylinder (6) is connected to the air outlet of the proportional valve (4). The piston rod of the correction cylinder (6) is connected to and drives the roller seat (21) of the correction roller (2) to move.

2. The belt filter press alignment device according to claim 1, characterized in that, The detection rod (3) is arranged perpendicularly to the edge of the filter belt, and the detection end of the detection rod (3) is provided with a roller (31), which makes rolling contact with the filter belt.

3. The belt filter press alignment device according to claim 2, characterized in that, The edge of the roller (31) has a groove (32) that surrounds itself in a direction perpendicular to its own axis of rotation. The height of the groove (32) is matched with the thickness of the filter belt. The position of the roller (31) is set so that the filter belt can be stuck in the groove (32) and roll in contact with the bottom of the groove (32).

4. The belt filter press alignment device according to claim 1, characterized in that, The detection rod (3) is an elastic telescopic structure, the roller (31) is located at the end of the telescopic part (33) of the detection rod (3), and the telescopic part (33) is connected to the valve core via the displacement conversion assembly (5); The telescopic part (33) includes a rod (34) and a sleeve (35) sleeved outside the rod (34). The rod (34) and the sleeve (35) are fitted with a clearance. The outer wall of the sleeve (35) is provided with a locking cavity (36) that communicates with its own interior. A first rack part (361) is provided on the side of the rod (34) facing the locking cavity (36). The locking cavity (36) is provided with a tooth block (362) that can reciprocate in a direction perpendicular to the first rack part (361). The tooth block (362) can mesh with the first rack part (361). A bolt (363) is threadedly connected inside the locking cavity (36) along the moving direction of the toothed block (362). The head of the bolt (363) is located outside the locking cavity (36). A rotating hole (364) is opened on the side of the toothed block (362) facing the bolt (363) along its own moving direction. The end of the bolt (363) is rotatably engaged with the rotating hole (364). A limiting groove (365) is opened at the bottom of the rotating hole (364) extending radially outward. A limiting plate (366) is provided at the end of the bolt (363) and is stuck in the limiting groove (365) to restrict the bolt (363) and the toothed block (362) from disengaging.

5. The belt filter press alignment device according to claim 1, characterized in that, The displacement conversion component (5) includes a first gear (51) and a second gear (52), which are coaxially arranged and rotate synchronously; the telescopic part of the control rod (53) and the detection rod (3) are both provided with a second rack part (54), which meshes with the first gear (51) and the second gear (52) respectively.

6. The belt filter press alignment device according to claim 1, characterized in that, The end of the control lever (53) connected to the valve core is provided with a push rod (55), and the push rod (55) is in contact with the valve core; The flow channel (41) has a V-shaped throttling groove (42) in contact with the valve core. The end of the valve core facing the flow channel (41) is a conical head (43) that matches it. The width of the V-shaped throttling groove (42) gradually increases along the axial direction of the valve core, so that the throttling area is linearly related to the displacement of the valve core.

7. The belt filter press alignment device according to claim 1, characterized in that, The frame (1) is provided with guide sleeves (11) that are respectively sleeved with the detection rod (3) and / or the control rod (53) to provide a preset static friction torque that prevents the detection rod (3) and / or the control rod (53) from swinging freely.

8. The belt filter press alignment device according to claim 1, characterized in that, The frame (1) is symmetrically provided with two sets of sliding grooves (22) in the vertical direction corresponding to the mounting position of the roller seat (21). Each side wall of the roller seat (21) is provided with a limiting block for each set of sliding grooves (22). The limiting block slides with the sliding groove (22) and can move along the sliding groove (22). Both ends of the two sets of sliding grooves (22) are provided with limiting posts (23) between them to limit the vertical movement of the roller seat (21).

9. The belt filter press alignment device according to claim 1, characterized in that, Includes a manual directional valve connected in parallel to both ends of the proportional valve (4), used to manually control the correction cylinder (6) to reset the correction roller (2) when the pneumatic control fails.

10. A method for correcting the alignment of a belt filter press, characterized in that, The belt filter press alignment device according to any one of claims 1-9 includes the following steps: S1, Pre-tightening contact and trend detection: The detection end of the detection rod (3) is pre-tightened to the edge of the filter belt. When the filter belt deviates slightly, the edge of the filter belt pushes the telescopic part (33) of the detection rod (3) to move along its own axis. S2, Mechanical displacement conversion: The linear movement of the detection rod (3) (telescopic part (33)) is converted into the linear movement of the control rod (53) along its own axis by the displacement conversion component (5); S3, Correction action: The control lever (53) pushes the valve core of the proportional valve (4) to move, driving the correction cylinder (6). The correction cylinder (6) drives the roller seat (21) at one end of the correction roller (2) to move along the slide groove (22) to adjust the tension of the filter belt on the side that is off track, so that the filter belt gradually returns to the correct position. S4. Static Zone Reset: When the filter belt returns to the correct position, the detection rod (3) loses the thrust of the filter belt edge. Under the elastic force of the elastic extension structure of the detection rod (3), the extension part (33) of the detection rod (3) returns to its original position synchronously. And through the conversion of the displacement conversion component (5), the control rod (53) cancels the thrust applied to the valve core, the valve core is reset, the proportional valve (4) stops supplying flow to the correction cylinder (6), and the correction action stops.

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