Plate-and-frame filter press for pseudo-boehmite production

Abstract

This invention belongs to the field of boehmite production equipment, and proposes a plate and frame filter press for boehmite production, including a frame, main beams, a filtration system, a rolling support mechanism, a pressing device, a hydraulic cylinder, and a guide support mechanism. One end of each of the two main beams is rotatably connected to the frame, and a guide support mechanism is provided between the other ends of the two main beams. The guide support mechanism includes a guide bracket with a swing guide hole. A synchronizing rod connecting the two main beams is provided in the swing guide hole. A connecting rod that rotates with the synchronizing rod is provided on the synchronizing rod. A pull rod is provided at the head end of the connecting rod, and a guide sleeve that horizontally moves with the pull rod and is connected to the frame is provided on the pull rod. One end of the pull rod is provided on a tension seat connected to the telescopic end of the hydraulic cylinder. This invention has a reasonable design, good automatic unloading effect, helps reduce the workload of workers assisting in shoveling material, and improves the overall utilization rate of the equipment, making it suitable for large-scale promotion.

Description

Technical Field

[0001] This invention belongs to the field of plate and frame filter presses, and particularly relates to a plate and frame filter press for the production of pseudoboehmite. Background Technology

[0002] In the separation process of pseudoboehmite, the pseudoboehmite slurry needs to be separated into liquid and solid components using a plate and frame filter press. The mother liquor is returned to the main alumina production process, while the solids enter a washing tank where water is added, heated, and stirred to wash away any adhering alkali. The filtration effect of the plate and frame filter press effectively separates the pseudoboehmite solids from the liquid, ensuring product quality. The plate and frame filter press mainly consists of a frame, a filtration system, a pressing device, a hydraulic system, and a discharge system.

[0003] In existing plate and frame filter presses, the unloading system includes a plate-pulling trolley, guide rails, a cable chain, and a transmission device. For example, Chinese utility model patent CN206980215U discloses an automatic plate-pulling filter press where the plate-pulling trolley moves along the guide rails via a transmission mechanism, and the automatic plate-pulling plates on the trolley hook onto the filter plates and frames, separating them one by one. Because the plate-pulling trolley uses frequent reciprocating motion and separates the filter plates and frames individually, the unloading cycle is relatively long. Furthermore, since the filter plates and frames mostly move horizontally, the automatic unloading effect of some filter cakes after separation is poor, resulting in a significant workload for workers assisting with shoveling and unloading, which to some extent affects the overall utilization rate of the equipment. Summary of the Invention

[0004] This invention addresses the technical problems of plate and frame filter presses mentioned above by proposing a plate and frame filter press for the production of boehmite that is reasonably designed, has a good automatic unloading effect, reduces the workload of workers in assisting with material shoveling, and improves the overall utilization rate of the equipment.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The plate and frame filter press for producing pseudo-boehmite provided by the present invention includes a frame, two main beams arranged on both sides of the frame, a filtration system and a pressing device arranged on the main beams, the filtration system including multiple filter plates and filter frames, the filter frames being provided with a discharge pipe, a flushing pipe and a rolling support mechanism, a filter cake tank and a mother liquor recovery tank arranged below the filtration system, a hydraulic cylinder arranged on one side of the pressing device, the hydraulic cylinder being horizontally arranged on the frame, the main beams being horizontally T-shaped, and one end of each of the two main beams being rotatably connected to the frame. A guide support mechanism is provided between the other ends of the beams. The guide support mechanism includes a guide bracket with a swing guide hole. A synchronous rod that horizontally connects the two main beams is provided in the swing guide hole. A connecting rod that rotates with the synchronous rod is provided on the synchronous rod. A pull rod that rotates with the connecting rod is provided at the head end of the connecting rod. A guide sleeve that horizontally moves with the pull rod and is connected to the frame is provided on the pull rod. A transverse elongated tension hole is provided at the end of the pull rod away from the guide sleeve. A tension shaft is provided in the tension hole. The tension shaft is provided on a tension seat, which is connected to the telescopic end of a hydraulic cylinder.

[0006] Preferably, the telescopic end of the hydraulic cylinder is provided with a balancing mechanism connected to the clamping device. The balancing mechanism includes an I-shaped balancing seat, a countersunk hole in the center of the balancing seat, the countersunk hole being nested with the telescopic end of the hydraulic cylinder, vertical elongated balancing holes on both sides of the countersunk hole, balancing bolts in the balancing holes, and a mating plate connected to the balancing bolts at the telescopic end of the hydraulic cylinder.

[0007] Preferably, the top of the filtration system and the pressing device is provided with a plate fastening mechanism. The plate fastening mechanism includes a pair of connecting seats provided on the top of each filter frame and the top of the pressing device. The connecting seats are I-shaped structures and have a pair of hinges on both sides of their top surface. Each pair of connecting seats is provided with two chain plates connected to the hinges. The chain plates on adjacent filter frames are hinged to each other.

[0008] Preferably, the rolling support mechanism includes an angular seat, an inner side of which a support roller is rotatably connected, and an outer side of which a loop seat is provided. The loop seat meanders toward the inner side of the main beam, and at its meandering end is a clamping roller opposite to the support roller. The support roller and the clamping roller are used to roll and support the top surface of the main beam. The axial distance between the support roller and the clamping roller is greater than the thickness of the top surface of the main beam.

[0009] Preferably, a limiting mechanism is provided above the guide support mechanism. The limiting mechanism includes a bushing connected to the top of the frame, and a horizontal limiting rod is provided in the bushing. The limiting rod cooperates with the T-shaped end of the main beam.

[0010] Preferably, a braking mechanism is provided on both sides of the hydraulic cylinder. The braking mechanism includes a thin cylinder, the telescopic end of which faces the main beam and is provided with a brake pawl. The side of the main beam is provided with a clamping pawl that cooperates with the brake pawl.

[0011] Preferably, the brake pawl includes a brake pawl plate, and the end face of the brake pawl plate is provided with three brake pawl blocks arranged in a circular array. The clamping pawl includes three clamping pawl blocks that are staggered with the brake pawl blocks.

[0012] Preferably, the back of the brake pawl is provided with a box-type seat, and the top and bottom surfaces of the box-type seat are slidably engaged with the inner box surface of the frame.

[0013] Preferably, the guide bracket is provided with a pair of horizontally parallel guide holes, and a guide shaft is provided in the horizontal guide holes, the guide shaft being connected to the end of the pull rod.

[0014] Compared with the prior art, the advantages and positive effects of the present invention are as follows:

[0015] The plate and frame filter press for producing pseudo-boehmite provided by this invention can not only adjust the tightness of the fit between the pressing device and the filtration system through the extension and retraction of the hydraulic cylinder, but also simultaneously control the angle of the main beam. This causes the filter frames to tend to separate under the guidance of the inclined main beam, which is beneficial to improving unloading efficiency. This invention has a reasonable design, good automatic unloading effect, reduces the workload of manual material handling, and improves the overall utilization rate of the equipment, making it suitable for large-scale promotion. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a plate and frame filter press for producing boehmite provided in an embodiment;

[0018] Figure 2 A side view of a plate and frame filter press for producing boehmite, provided for an embodiment;

[0019] Figure 3 for Figure 2 Enlarged schematic diagram of the plate and frame filter press for boehmite production in China at point A;

[0020] Figure 4 A front view of a plate and frame filter press for producing boehmite provided in an embodiment;

[0021] Figure 5 for Figure 4 Enlarged schematic diagram of the plate and frame filter press for boehmite production in China at point B;

[0022] Figure 6 A top view of a plate and frame filter press for producing boehmite, provided in an embodiment;

[0023] Figure 7 This is a schematic diagram showing the distribution of the rolling support mechanism on the filter frame;

[0024] Figure 8 A three-dimensional view of the clamping device, balancing mechanism, and hydraulic cylinder;

[0025] Figure 9 Working drawings for the guide support mechanism, frame, and main beam;

[0026] Figure 10 A three-dimensional view of the guide support mechanism, frame, and main beam;

[0027] Figure 11 This is a schematic diagram of the braking mechanism operating on the main beam.

[0028] In the above figures:

[0029] 1. Frame; 2. Main beam; 3. Filtration system; 31. Filter plate; 32. Filter frame; 33. Discharge pipe; 34. Washing pipe; 35. Filter cake tank; 36. Mother liquor recovery tank; 4. Pressing device; 5. Rolling support mechanism; 51. Angle seat; 52. Support roller; 53. Recessed seat; 54. Clamping roller; 6. Hydraulic cylinder; 7. Guide support mechanism; 71. Guide bracket; 72. Swing guide hole; 73. Synchronizing rod; 74. Connecting rod; 75. Pull rod; 76. Guide sleeve; 77. Tension hole; 78. Tension shaft; 79. Tension seat 710. Horizontal guide hole; 711. Guide shaft; 8. Balancing mechanism; 81. Balancing seat; 82. Countersunk hole; 83. Balancing hole; 84. Balancing bolt; 85. Butt plate; 9. Plate buckle mechanism; 91. Connecting seat; 92. Hinge; 93. Chain plate; 10. Limiting mechanism; 101. Bushing; 102. Limiting rod; 11. Braking mechanism; 111. Thin cylinder; 112. Brake pawl; 1121. Brake pawl plate; 1122. Brake pawl block; 113. Clamping pawl; 1131. Clamping pawl block; 114. Box-type seat. Detailed Implementation

[0030] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0031] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0032] Examples, such as Figures 1-11 As shown, the plate and frame filter press for producing boehmite provided by the present invention includes a frame 1. Two main beams 2 are arranged on both sides of the frame 1. A filtration system 3 and a pressing device 4 are arranged on the main beams 2. The filtration system 3 includes multiple filter plates 31 and filter frames 32. A discharge pipe 33, a flushing pipe 34 and a rolling support mechanism 5 are arranged on the filter frames 32. A filter cake tank 35 and a mother liquor recovery tank 36 are arranged below the filtration system 3. A hydraulic cylinder 6 is arranged on one side of the pressing device 4. The hydraulic cylinder 6 is horizontally arranged on the frame 1. The frame 1 includes at least two steel plate frames arranged opposite each other on the left and right sides. The two sides of the steel plate frames are bolted to the mother liquor recovery tank 36, thus the mother liquor recovery tank 36 also serves to reinforce the frame 1 to some extent. The inner side of the steel plate frames is used to centrally place the filter cake tank 35, which holds the pseudo-boehmite filter cake discharged during the unloading process. The filter plate 31 is located in the middle of the filter frame 32. The filter plate 31 can be a perforated plate with holes covering its entire surface, or it can be designed with multiple filter caps arranged in a unified manner. The filtrate enters the interior of the filter frame 32 through the filter holes and is discharged into the mother liquor recovery tank 36 through the discharge pipe 33, where it is filtered onto the adjacent filter plates 3. The filter cake between 1 and 2 falls during the unloading process; the flushing pipe 34 is used to connect to the flushing water source to backwash the filter plate 31 to ensure the pressure filtration performance of the device in the next working stage; the specifications and stroke of the hydraulic cylinder 6 are designed to meet the pressure filtration requirements. The workshop is equipped with a hydraulic station. After receiving the command, the hydraulic station supplies hydraulic oil as needed. The motor drives the oil pump to rotate and draw hydraulic oil from the oil tank. The oil pump pressurizes the hydraulic oil to form high-pressure oil. The valve stabilizes the system pressure to ensure that the pressure does not exceed the set value. After the high-pressure oil enters the hydraulic cylinder 6, it pushes the piston to move, converting hydraulic energy into mechanical energy, thereby realizing the extension and retraction action.

[0033] Based on this, the main beam 2 provided by the present invention is a horizontally lying T-shaped beam. The main beam 2 includes a beam plate body, which is T-shaped and has a reinforcing steel plate around its perimeter. In particular, its top surface is used to cooperate with the rolling support mechanism 5, providing a support plane for the filter plate 31 and the filter frame 32. One end of each of the two main beams 2 is rotatably connected to the frame 1, and a guide support mechanism 7 is provided between the other ends of the two main beams 2. The guide support mechanism 7 includes a guide bracket 71, and the guide bracket 71 is provided with a swing guide hole 72. A synchronizing rod 73 is provided in the hole 72 to horizontally connect the two main beams 2. A connecting rod 74 is provided on the synchronizing rod 73 to rotate with it. A pull rod 75 is provided at the head end of the connecting rod 74 to rotate with it. A guide sleeve 76 is provided on the pull rod 75 to move horizontally with it and to connect with the frame 1. A transverse elongated tension hole 77 is provided at the end of the pull rod 75 away from the guide sleeve 76. A tension shaft 78 is provided in the tension hole 77. The tension shaft 78 is provided on the tension seat 79. The tension seat 79 is connected to the telescopic end of the hydraulic cylinder 6.

[0034] Specifically, the head end of the main beam 2 is provided with a pivot hole, which is axially connected to the pivot hole set on the frame 1; the tail end of the main beam 2 is close to the hydraulic cylinder 6 and its bottom extends a distance towards the workshop floor. The extended part is used to connect the synchronizing rod 73, which lowers the center of gravity of the synchronizing rod 73 and limits the actual swing limit of the main beam 2; the top of the swing guide hole 72 is the upper limit of the synchronizing rod 73, and its bottom end is the lower limit of the synchronizing rod 73. The swing guide hole 72 provides the synchronizing rod 73 with a central angle of less than 70 degrees corresponding to the swing arc length of the upper and lower limits, which limits the maximum swing angle of the main beam 2 and helps to improve the safety of the main beam 2 and the filter system 3 and the pressing device 4 supported by the main beam 2 during the adjustment process of this device. Furthermore, the guide support mechanism 7 is used to adjust the angle of the main beam 2 during the unloading process. The adjustment power comes partly from the gravity of the main beam 2 and the entire structure it supports, and partly from the driving force of the hydraulic cylinder 6. Therefore, the extension and retraction of the hydraulic cylinder 6 can not only adjust the tightness of the fit between the clamping device 4 and the filter system 3, but also control the angle of the main beam 2 synchronously.

[0035] More specifically, the left and right ends of the tension hole 77 provide two limit nodes for the movement of the tension shaft 78, such as... Figure 4As shown, when the tension shaft 78 is at the left limit position of the tension hole 77, the tension seat 79 is also at the longest extension position of the hydraulic cylinder 6, and the tie rod 75, connecting rod 74, and synchronizing rod 73 are in a taut state, with the synchronizing rod 73 at the upper limit position. This allows the main beam 2 to be in a horizontal state, and the clamping device 4 also maintains the clamping of the filter plate 31 and filter frame 32 in the filtration system 3, thus enabling effective pressure filtration. Conversely, when the extension end of the hydraulic cylinder 6 retracts, the weight of the main beam 2 and its supporting structure applies downward swing pressure to the synchronizing rod 73. The movement tendency of the synchronizing rod 73 can cause the connecting rod 74 and the tie rod 75 to move in tandem. The tie rod 75 generates a translational distance in the direction of the hydraulic cylinder 6. During the process when the main beam 2 has not fully swung into position, the tension shaft 78 is always in contact with the tension hole 77. 7. Maintaining a tight fit ensures stability during the downward swing of the main beam 2. After the main beam 2 has fully swung into position, since all the filter frames 32 and filter plates 31 have not yet completely separated, the hydraulic cylinder 6 needs to continue retracting its telescopic end, while the pull rod 75 no longer moves horizontally. The tension shaft 78 and the tension shaft 79 are loosely fitted. The tension seat 79 continues to move horizontally towards the right limit position of the tension hole 77 as the telescopic end of the hydraulic cylinder 6 retracts, until the tension shaft 78 reaches the right limit position. The hydraulic cylinder 6 then stops retracting, and all the filter frames 32 are completely separated from the main beam 2. The filter frames 32, which were originally in a synchronous tilted posture with the main beam 2, can automatically switch to a vertical posture due to gravity. At the moment of this posture change, the filter residue can be automatically unloaded, effectively reducing the workload of workers assisting in shoveling materials.

[0036] The front and rear mechanical actions of the guide support mechanism 7 provided by this invention constitute a complete unloading action. This design not only controls the inclination limit of the main beam 2 but also prevents the improved equipment from significantly exceeding the original equipment's volume, thus improving the equipment's space utilization. It should be noted that this equipment can be equipped with the existing plate-pulling trolley or not. Even with the plate-pulling trolley installed, the total reciprocating stroke of the trolley is significantly shortened. Therefore, this equipment is beneficial for improving unloading efficiency and overall equipment utilization.

[0037] like Figure 1 , Figure 6 , Figures 8-10As shown, the extension end of the hydraulic cylinder 6 provided by the present invention is provided with a balancing mechanism 8 connected to the clamping device 4. The balancing mechanism 8 includes an I-shaped balancing seat 81, with a countersunk hole 82 at the center of the balancing seat 81. The countersunk hole 82 is nested with the extension end of the hydraulic cylinder 6. Vertical elongated balancing holes 83 are provided on both sides of the countersunk hole 82, and balancing bolts 84 are provided in the balancing holes 83. The extension end of the hydraulic cylinder 6 is provided with a mating plate 85 connected to the balancing bolts 84. Considering that rollers are also provided on both sides of the clamping device 4 to ensure its translation performance on the main beam 2, the clamping device 4 will automatically straighten from tilt during the unloading stage, while the hydraulic cylinder 6 remains fixedly connected to the frame 1. The linear direction of the extension and retraction of the hydraulic cylinder 6 will not change. Therefore, in order to ensure the efficiency of the hydraulic cylinder 6 in driving the clamping device 4 and the filtration system 3 to separate, the present invention installs a balancing mechanism 8 at the extension end of the hydraulic cylinder 6. Specifically, in its longest extended state, the shaft end of the hydraulic cylinder 6 protrudes and is nested in the countersunk hole 82 to ensure the straightness and reliability of the hydraulic cylinder 6 loading the clamping device 4. During the shortening process of the extension end of the hydraulic cylinder 6, its shaft end exits the countersunk hole 82, and the docking plate 85 pulls all the balance bolts 84 to move horizontally. The clamping device 4 tilts with the tilting trend of the main beam 2. The balance hole 83 provides sufficient margin for the balance bolts 84. Therefore, the balance bolts 84 not only always maintain the connection between the balance seat 81 and the docking plate 85, so that the driving force of the hydraulic cylinder 6 can be effectively transmitted to the clamping device 4 and the filter frame 32, but also meet the mechanical requirement of the clamping device 4 returning to the vertical direction after tilting, so as to effectively separate from the filter frame 32.

[0038] like Figures 1-6As shown, the present invention provides a set of plate fastening mechanism 9 on the top of the filtration system 3 and the pressing device 4. The plate fastening mechanism 9 includes a pair of connecting seats 91 on the top of each filter frame 32 and the top of the pressing device 4. The connecting seats 91 have an I-shaped structure and a pair of hinge ears 92 on both sides of their top surface. Each pair of connecting seats 91 is provided with two chain plates 93 connected to the hinge ears 92. The chain plates 93 on adjacent filter frames 32 are hinged to each other. In this way, as the main beam 2 swings downward under the drive of the hydraulic cylinder 6, the plate buckle tends to unfold until all the filter frames 32 are completely separated along the length of the main beam 2. The plate buckle mechanism 9 is fully opened, providing sufficient unloading gaps between adjacent filter frames 32, allowing ample operating space for manual shoveling. Simultaneously, each filter frame 32 can switch to a vertical position around the hinge center between its top hinge 92 and the chain plate 93. During this separation and posture switching phase, the filter cake can be automatically unloaded, while any remaining filter cake is manually shoveled. This invention, with the assistance of the guide support mechanism 7 and the plate buckle mechanism 9, enables effective separation and unfolding of adjacent filter frames 32, effectively shortening the necessary unloading time. Furthermore, if this equipment is equipped with a plate-pulling trolley, the total stroke of the trolley will be greatly shortened, thus helping to shorten the production cycle of the pseudo-boehmite and improve workshop production efficiency.

[0039] like Figure 1 , Figure 3 and Figure 7As shown, the rolling support mechanism 5 provided by the present invention includes an angular seat 51. A support roller 52 is rotatably connected to the inner side of the angular seat 51. A loop seat 53 is provided on the outer side of the angular seat 51. The loop seat 53 meanders toward the inner side of the main beam 2 and a clamping roller 54 opposite to the support roller 52 is provided at the end of its meandering. The support roller 52 and the clamping roller 54 are used to roll and support the top surface of the main beam 2. The axial distance between the support roller 52 and the clamping roller 54 is greater than the thickness of the top surface of the main beam 2. The support roller 52 is always in contact with the top surface of the main beam 2 and provides support, ensuring that the filter frame 32 and the filter plate 31 have a reasonable height from the ground. As for the clamping roller 54, during the filter pressing operation of this equipment, the clamping roller 54 is not in contact with the top surface of the main beam 2, so the clamping roller 54 and the main beam 2 maintain a certain gap. During the unloading stage, the main beam 2 is driven to tilt to a certain extent, and the rolling support mechanism 5 moves along the surface of the main beam 2 as the filter frame 32 separates. Due to gravity, the separated filter frame 32 tends to return to a vertical posture, and the rolling support mechanism 5 swings with the filter frame 32 until the clamping roller 54 clamps the inner side of the top surface of the main beam 2. In conjunction with the support roller 52, the filter frame 32 can be stably supported on the main beam 2. In this way, at the moment the filter frame 32 resets, the clamping roller 54 and the inner side of the top surface of the main beam 2 have a certain impact force. This impact force and inertia are conducive to the separation of filter residue from the filter plate 31 and the filter frame 32, which is beneficial to unloading. On the other hand, the clamping action of the clamping roller 54 and the support roller 52 on the main beam 2 reduces the pressure of the plate fastening mechanism 9 at its multiple hinge centers to a certain extent, which is conducive to extending the actual service life of the plate fastening mechanism 9.

[0040] like Figure 1 , Figure 3 and Figure 4 As shown, a limiting mechanism 10 is provided above the guide support mechanism 7. The limiting mechanism 10 includes a bushing 101 connected to the top of the frame 1. A horizontal limiting rod 102 is provided in the bushing 101, and the limiting rod 102 cooperates with the T-shaped end of the main beam 2. Both ends of the limiting rod 102 extend from the bushing 101. As the T-shaped end of the main beam 2 returns to its original horizontal position driven by the hydraulic cylinder 6, the limiting rod 102 effectively limits the final lifting limit, thereby ensuring that the balancing mechanism 8 and the shaft end of the hydraulic cylinder 6 are fully aligned. This helps to ensure the filtration performance of the pressing device 4 and the filtration system 3 in the filtration process.

[0041] like Figure 1 , Figure 2 , Figure 3 and Figure 11As shown, to improve the pressure filtration performance of this equipment, the present invention provides an interlocking mechanism. One locking mechanism is a mechanical self-locking structure composed of a pull rod 75, a connecting rod 74, a synchronizing rod 73, and a hydraulic cylinder 6. The other locking mechanism is provided by a braking mechanism 11. Specifically, a braking mechanism 11 is provided on both sides of the hydraulic cylinder 6. The braking mechanism 11 includes a thin cylinder 111 that is horizontally mounted on the frame 1. The telescopic end of the thin cylinder 111 is horizontally oriented towards the main beam 2 and is provided with a brake pawl 112 at its telescopic end. The side of the main beam 2 is provided with a clamping pawl 113 that cooperates with the brake pawl 112. The thin cylinder 111 can be either a thin electric push cylinder or a thin pneumatic cylinder. If a thin pneumatic cylinder is used, it is connected to the air source provided by the workshop, which provides driving force to the thin cylinder 111. The thin cylinder 111 can quickly engage and disengage the brake pawl 112 and the clamping pawl 113 through rapid extension and retraction. The action time interval is short, which can fully match the driving action of the hydraulic cylinder 6, improve the unloading efficiency of the equipment, and after the brake pawl 112 and the clamping pawl 113 are fully engaged, the interlocking effect of the two locking structures can effectively improve the reliability of the interlocking mechanism of the equipment, so as to ensure the filtration performance of the equipment in the filtration stage.

[0042] Furthermore, the brake pawl 112 provided by the present invention includes a brake pawl plate 1121, and the end face of the brake pawl plate 1121 is provided with three brake pawl blocks 1122 arranged in a circular array. The engaging pawl 113 includes three engaging pawl blocks 1131 that are staggered with the brake pawl blocks 1122. By using the spaced distribution of six pawl blocks, multiple pairs of braking pairs can be formed, and the braking area and braking diameter of the braking pairs are relatively large, which can effectively improve the reliability of the braking mechanism.

[0043] To improve the reliability of the interlocking mechanism, the brake pawl 112 provided in this invention is provided with a box-type seat 114 on its back. The top and bottom surfaces of the box-type seat 114 are slidably engaged with the inner box surface of the frame 1. By using the box-type seat 114 to engage with the frame 1, multiple pairs of planar contact pairs are formed between the two, which can effectively reduce the load on the telescopic shaft of the thin cylinder 111. This facilitates the transmission of the pressure of the main beam 2 to the frame 1, and then from the frame 1 to the ground, thereby improving the stability of the main beam 2 under the action of the interlocking mechanism and ensuring that the mechanical parts constituting the interlocking mechanism have a longer actual service life.

[0044] To improve the efficiency of the translational movement of the pull rod 75, the guide bracket 71 provided by this invention is provided with a pair of horizontally parallel guide holes 710, each containing a guide shaft 711, which is connected to the end of the pull rod 75. The pull rod 75 is made of welded sheet metal or steel profiles, and the inner hole of the guide sleeve 76 that mates with it is a square hole. The two guide shafts 711 engage with the horizontal guide holes 710 via cylindrical contact. Each guide shaft and the horizontal guide hole 710 form two line contact pairs, resulting in four line contact pairs at the end of the pull rod 75 engaging with the guide bracket 71. This provides better guidance and support for the pull rod 75 and prevents it from jamming at the guide sleeve 76.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A plate and frame filter press for producing borosilicate glass, comprising a frame, two main beams on both sides of the frame, a filtration system and a pressing device mounted on the main beams, the filtration system comprising multiple filter plates and filter frames, the filter frames being provided with a discharge pipe, a flushing pipe and a rolling support mechanism, a filter cake tank and a mother liquor recovery tank being located below the filtration system, and a hydraulic cylinder mounted on one side of the pressing device, the hydraulic cylinder being horizontally mounted on the frame, characterized in that... The main beams are horizontally T-shaped, with one end of each main beam rotatably connected to the frame. A guide support mechanism is provided between the other ends of the two main beams. The guide support mechanism includes a guide bracket with a swing guide hole. A synchronizing rod horizontally connects the two main beams within the swing guide hole. A connecting rod rotatably engages with the synchronizing rod. A pull rod rotatably engages with the head of the connecting rod. A guide sleeve horizontally moves with the pull rod and connects to the frame. A transverse elongated tension hole is provided at the end of the pull rod away from the guide sleeve, and a tension shaft is provided within the tension hole. The tension shaft is mounted on the tension seat, which is connected to the telescopic end of the hydraulic cylinder. The head end of the main beam is provided with a pivot hole, which is axially connected to the pivot mounted on the frame. The tail end of the main beam is close to the hydraulic cylinder, and the bottom of the tail end of the main beam extends towards the workshop floor. The extended portion is used to connect the synchronizing rod and limit the downward swing limit of the main beam. The top end of the swing guide hole is used to limit the upper limit of the synchronizing rod, and the bottom end of the swing guide hole is used to limit the lower limit of the synchronizing rod. The central angle corresponding to the swing arc length of the upper and lower limits provided by the swing guide hole for the synchronizing rod is less than 70 degrees, and it limits the maximum swing angle of the main beam.

2. The plate and frame filter press for producing boehmite according to claim 1, characterized in that, The telescopic end of the hydraulic cylinder is provided with a balancing mechanism connected to the clamping device. The balancing mechanism includes an I-shaped balancing seat with a countersunk hole at the center. The countersunk hole is nested with the telescopic end of the hydraulic cylinder. Vertical elongated balancing holes are provided on both sides of the countersunk hole. Balancing bolts are installed in the balancing holes. The telescopic end of the hydraulic cylinder is provided with a mating plate connected to the balancing bolts.

3. The plate and frame filter press for producing boehmite according to claim 2, characterized in that, The top of the filtration system and the pressing device is provided with a plate fastening mechanism. The plate fastening mechanism includes a pair of connecting seats on the top of each filter frame and the top of the pressing device. The connecting seats are I-shaped structures and have a pair of hinges on both sides of their top surface. Each pair of connecting seats is provided with two chain plates connected to the hinges. The chain plates on adjacent filter frames are hinged to each other.

4. The plate and frame filter press for producing boehmite according to claim 3, characterized in that, The rolling support mechanism includes an angular seat, an inner side of which a support roller is rotatably connected, and an outer side of which a loop seat is provided. The loop seat meanders toward the inner side of the main beam, and at its meandering end is a clamping roller opposite to the support roller. The support roller and the clamping roller are used to roll and support the top surface of the main beam. The axial distance between the support roller and the clamping roller is greater than the thickness of the top surface of the main beam.

5. The plate and frame filter press for producing boehmite according to claim 1, characterized in that, A limiting mechanism is provided above the guide support mechanism. The limiting mechanism includes a bushing connected to the top of the frame, and a horizontal limiting rod is provided in the bushing. The limiting rod cooperates with the T-shaped end of the main beam.

6. The plate and frame filter press for producing boehmite according to claim 1, characterized in that, A braking mechanism is provided on both sides of the hydraulic cylinder. The braking mechanism includes a thin cylinder. The telescopic end of the thin cylinder faces the main beam and is provided with a brake pawl. The side of the main beam is provided with a clamping pawl that cooperates with the brake pawl.

7. The plate and frame filter press for producing boehmite according to claim 6, characterized in that, The brake pawl includes a brake pawl plate, and the end face of the brake pawl plate is provided with three brake pawl blocks arranged in a circular array. The clamping pawl includes three clamping pawl blocks that are staggered with the brake pawl blocks.

8. The plate and frame filter press for producing boehmite according to claim 7, characterized in that, The back of the brake pawl is provided with a box-type seat, and the top and bottom surfaces of the box-type seat are slidably engaged with the inner box surface of the frame.

9. The plate and frame filter press for producing boehmite according to claim 1, characterized in that, The guide bracket is provided with a pair of horizontally parallel guide holes, and a guide shaft is provided in the horizontal guide holes. The guide shaft is connected to the end of the pull rod.

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