A gravity tensioning cloth device for a belt filter

Abstract

The utility model relates to a belt filter auxiliary equipment technical field, concretely relates to a gravity tensioning filter cloth device for belt filter, including the gravity roller that can vertically remove and rotate around own axis, the vertical guide rail of the front and back side of the frame is established, and the slide block of the guide rail cooperation is fixedly connected the slide seat, and the gravity roller is established in the middle part of slide seat, the frame is established upper and lower sprocket, and the chain is connected slide seat, and two upper sprocket, two lower sprocket or both are fixed through through shaft. Optional damping mechanism adjusts lifting buffer, and the chain can be segmented stringing tensioner. The utility model realizes the multiple function of'synchronous tensioning, self -adaptation telescoping, stable buffer' through structural innovation, effectively overcomes the defects of prior art, and the reliability, economy and applicability of belt filter filter cloth tensioning device are significantly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for belt filter presses, specifically to a gravity tensioning filter cloth device for belt filter presses, which is suitable for stable tensioning of filter cloth during the operation of belt filter presses, and avoids filter cloth displacement or damage. Background Technology

[0002] In practical applications of belt filter presses, the filter cloth tensioning device is one of the key components ensuring the normal operation of the belt filter press. Its performance directly affects the service life of the filter cloth and the filtration efficiency of the belt filter press. Currently, existing filter cloth tensioning devices have certain structural defects: The drawback of single gravity tensioning: Some devices rely solely on the gravity of the rollers to tension the filter cloth. However, over time, the filter cloth may become uneven in length on both sides, causing the gravity rollers to tilt and the filter cloth to shift. This not only affects the filtration effect but also accelerates wear on the filter cloth edges, shortening its lifespan. Defects of screw clamping: Another part of the device uses a screw to clamp and fix the filter cloth on the upper part of the gravity roller. When the filter cloth shrinks due to temperature changes, tension, or other reasons, the screw cannot move synchronously with the shrinkage of the filter cloth, resulting in excessive tension between the filter cloth and the roller. This can easily cause the filter cloth to tear or the roller to deform and be damaged, increasing equipment maintenance costs and downtime. Utility Model Content

[0003] To overcome the deficiencies or one of the deficiencies of the existing technology, this utility model discloses a gravity-tensioned filter cloth device for a filter press, solving the technical problems of "single gravity tension causing gravity roller tilting and filter cloth offset" or "screw tightening failing to move with filter cloth contraction, leading to filter cloth / roller damage," while ensuring the stability of the gravity roller during operation. The following technical solution is adopted for this purpose: A gravity-tensioned filter cloth device for a filter press includes a gravity roller. The axis of the gravity roller is horizontal and it is rotatably mounted on the frame of the filter press, while the gravity roller can move freely in the vertical direction. At least one section of the filter cloth is wrapped around the outer circumference of the gravity roller. The gravity roller applies a downward tension force in the vertical direction to the filter cloth wrapped around it by its own weight. The device is characterized in that guide rails extending in the vertical direction are fixed on the front and rear sides of the frame, and slide blocks are fixedly connected to the sliders that slide with the guide rails. The gravity roller is rotated in the middle of the slide blocks. Upper sprockets and lower sprockets are rotated on the frame outside the upper and lower ends of the guide rails, respectively. The two ends of the chain pass over the upper and lower sprockets and are fixedly connected to the slide blocks, and the two upper sprockets and / or the two lower sprockets are fixedly connected by a through shaft.

[0004] Furthermore, it also includes a damping mechanism, which includes a damping wheel fixedly mounted on the outside of the lower sprocket and coaxially fixed to the lower sprocket, an adjusting screw screwed to the frame and whose axial direction is consistent with the axial direction of the lower sprocket, and a damping plate fixedly connected to the inner end of the adjusting screw, the damping plate abutting against the end face of the damping wheel.

[0005] Furthermore, the chain is divided into two segments, with a tensioner connected in series between the two segments.

[0006] Furthermore, the tensioner is a spring.

[0007] Furthermore, the tensioner includes a connecting plate, on which an axially vertical tensioning screw is screwed. The connecting plate and the tensioning screw are respectively fixed to the serial ends of the two chain segments.

[0008] Furthermore, the chain is a roller chain, and the upper and lower sprockets have 20-30 teeth each, which are meshed with the chain.

[0009] Furthermore, the guide rail has a T-shaped cross-section, and the slider is provided with a T-shaped groove that matches the T-shaped guide rail. The slider and the guide rail form an anti-slip sliding fit through the T-shaped groove.

[0010] Furthermore, both ends of the gravity roller are rotatably connected to the slide block via deep groove ball bearings, with the outer ring of the bearing having an interference fit with the slide block and the inner ring having a transition fit with the gravity roller shaft head.

[0011] Furthermore, both ends of the through shaft are mounted on the frame via seated bearings, and the base of the seated bearings is bolted to the frame.

[0012] Furthermore, the outer circumferential surface of the gravity roller is uniformly distributed with anti-slip textures along the axial direction, and the depth of the anti-slip textures is 0.5-1mm.

[0013] The beneficial technical effects of this utility model are as follows: 1. Solving the problem of gravity roller tilting and filter cloth misalignment: Through the rigid constraint structure of "double-sided guide rail-slide seat" combined with the synchronous transmission design of "through shaft fixed connection double sprocket", the two ends of the gravity roller are forced to keep horizontal and synchronously raised and lowered. This completely avoids the problem of gravity roller tilting caused by the difference in length on both sides of the filter cloth in traditional single gravity tensioning devices. It eliminates the hidden danger of filter cloth misalignment from the root, reduces wear on the edge of the filter cloth, extends the service life of the filter cloth, and ensures the stability of the filtration effect of the filter press.

[0014] 2. Adaptive filter cloth expansion and contraction, protecting core components: The gravity roller can move freely in the vertical direction. With the transmission linkage of chain and sprocket, it can adjust its position synchronously with the filter cloth as it changes in temperature, is stretched or contracted by force. This avoids the problem of "excessive stretching of the filter cloth caused by rigid fixation" in the screw clamping structure, effectively preventing filter cloth tearing and roller deformation, and reducing equipment maintenance costs and downtime.

[0015] 3. Improved operational stability and buffering performance: The damping mechanism, through the frictional damping effect of the damping plate and the damping wheel, can flexibly adjust the lifting speed of the gravity roller, avoiding the impact of "sudden rise and fall" caused by its own weight or sudden changes in filter cloth tension, reducing device vibration, and further ensuring the stability of filter cloth tension; at the same time, the design of the adjusting screw can adapt to the damping requirements under different working conditions, enhancing the adaptability of the device.

[0016] 4. Optimized transmission reliability and ease of maintenance: The segmented chain design and the addition of a tensioner can compensate for the stretching and slack of the chain caused by long-term use in real time, ensuring the meshing accuracy between the chain and the sprocket and maintaining transmission synchronization; the diversified design of the tensioner (automatic spring tensioning or manual screw adjustment) can adapt to different tension requirements, improving the practicality and ease of maintenance of the device.

[0017] 5. Enhanced structural details and wider adaptability: The T-shaped guide rail anti-detachment design, the precision fit of the deep groove ball bearing, and the stable support of the through shaft by the seated bearing are among the optimized details that further improve the structural strength and operating accuracy of the device; the anti-slip texture design on the outer periphery of the gravity roller enhances the friction with the filter cloth, avoiding local wear caused by relative sliding, making the device suitable for filter cloths of various materials and thicknesses, and thus having a wider range of applications.

[0018] In summary, this utility model achieves multiple functions of "synchronous tensioning, adaptive expansion and contraction, and stable buffering" through structural innovation, effectively overcoming the defects of the prior art and significantly improving the reliability, economy and applicability of the filter cloth tensioning device for filter presses. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0021] Figure 3 for Figure 1 The left view.

[0022] Figure 4 for Figure 3 A magnified view of a section at point B in the middle. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the paper. This orientation or positional relationship is only for the convenience of describing this utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] like Figure 1-4 The illustrated gravity-tensioned filter cloth device for a filter press includes a gravity roller 1. The gravity roller 1 is horizontally oriented and rotatably mounted on the frame 100 of the filter press, while also being able to move freely in the vertical direction. At least one section of the filter cloth 200 is wound around the outer circumference of the gravity roller 1. The gravity roller 1 applies a downward tension force in the vertical direction to the filter cloth 200 wound around it by its own weight. The front and rear sides of the frame 100 are respectively fixed with vertical tensioning devices. A guide rail 2 extends in a straight direction, and a slider 3 is fixedly connected to the slider that slides with the guide rail 2. The gravity roller 1 is rotated in the middle of the slider 3. An upper sprocket 4 and a lower sprocket 5 are respectively rotated on the frame 100 outside the upper and lower ends of the guide rail 2. The two ends of the chain 6 pass around the upper sprocket 4 and the lower sprocket 5 respectively and are fixedly connected to the slider 3. The two lower sprockets 5 are fixedly connected by a through shaft 7. The two upper sprockets 4 are independently rotated on the frame 100 and are not fixedly connected by a through shaft 7.

[0027] The working principle of this embodiment can be summarized as "gravity tensioning as the core, synchronous transmission as the guarantee, and adaptive adjustment as the key", as detailed below: 1. The fundamental role of gravity tension The gravity roller 1 applies a downward vertical tension force to the filter cloth 200 wound around it using its own weight, which is the core power source for maintaining the tension of the filter cloth. As the filter cloth 200 moves with the other rollers during the operation of the belt filter, the gravity roller 1 continuously acts on the filter cloth, ensuring that the filter cloth is always in a taut state and preventing slack from affecting the filtration effect.

[0028] 2. Synchronous transmission and anti-tilt mechanism The vertical guide rails 2 on the front and rear sides of the frame 100 cooperate with the slider to limit the slide 3 to move only in the vertical direction (it cannot tilt horizontally), while the gravity roller 1 is mounted in the middle of the slide 3. The horizontal posture of the slide directly determines the horizontality of the axis of the gravity roller, thus structurally constraining the gravity roller to prevent it from tilting. Two lower sprockets 5 are fixedly connected by a through shaft 7 to form a "rigid synchronous body"—when the filter cloth 200 drives the gravity roller 1 to rise and fall, the chain 6 pulls the lower sprockets 5 to rotate, and the through shaft 7 forces the lower sprockets on both sides to rotate synchronously at the same angle, ensuring that the tension and displacement of the chains on both sides on the slide block 3 are completely consistent, so that the slide block 3 drives the gravity roller 1 to rise and fall horizontally at all times, completely avoiding the tilting of the gravity roller and the offset of the filter cloth caused by the difference in movement on both sides. The independent setting of the upper sprocket 4 (without a through shaft) does not affect the core synchronization, as it only serves as a chain guide. The key to synchronous transmission is ensured by the lower sprocket 5 and the through shaft 7.

[0029] 3. The adjustment process of adaptive filter cloth stretching When the filter cloth 200 stretches due to stress, temperature changes, etc.: the filter cloth tension decreases, the gravity roller 1 moves downward under its own weight, and drives the lower sprockets 5 on both sides to rotate synchronously through the chain 6 (through shaft 7 ensures synchronization). The slide 3 moves vertically downward along the guide rail 2. The downward movement of the gravity roller 1 matches the stretching of the filter cloth, maintaining the stability of the filter cloth tension. When the filter cloth 200 shrinks: the tension of the filter cloth increases, pulling the gravity roller 1 to move upward. The chain 6 drives the lower sprocket 5 to rotate synchronously in the opposite direction. The slide 3 moves vertically upward along the guide rail 2. The upward movement of the gravity roller 1 is synchronized with the amount of filter cloth shrinkage, so as to avoid the filter cloth being overstretched and torn.

[0030] In summary, this embodiment achieves stable tension of the filter cloth through the synergistic effect of "gravity tension providing basic force + guide rail-slide constraining motion trajectory + lower sprocket-through shaft ensuring transmission synchronization". At the same time, it can adapt to the expansion and contraction of the filter cloth, effectively solving the problems of tilting, offset and excessive pulling in traditional devices.

[0031] In another preferred embodiment, the two upper sprockets 4 are fixedly connected by a through shaft 7, while the two lower sprockets 5 are independently mounted on the frame 100 without being fixedly connected by a through shaft 7. When the two upper sprockets are fixedly connected by a through shaft while the lower sprockets are independent, the forced synchronization performance of the upper sprockets ensures the consistency of the upper chain transmission. The auxiliary slide maintains a horizontal posture during lifting and lowering, effectively enhancing the stability of the upper transmission structure and reducing operational deviations caused by the asynchrony of the upper sprockets.

[0032] In another preferred embodiment, both upper sprockets 4 and both lower sprockets 5 are fixedly connected by a through shaft 7. When both upper and lower sprockets are fixedly connected by the through shaft, the upper and lower double synchronous constraint structure forms a complete transmission synchronization system, which can minimize the movement difference between the chains on both sides and ensure that the gravity roller always remains horizontal from the upper and lower transmission nodes, further improving the stability of the device operation.

[0033] In another preferred embodiment, a damping mechanism 8 is further included. The damping mechanism 8 includes a damping wheel 81 fixedly mounted on the outside of the lower sprocket 5 and coaxially connected to the lower sprocket 5, an adjusting screw 83 screwed to the frame 100 and whose axial direction is consistent with the axial direction of the lower sprocket 5, and a damping plate 82 fixedly connected to the inner end of the adjusting screw 83, the damping plate 82 abutting against the end face of the damping wheel 81. When a damping mechanism is added, the contact pressure between the damping plate and the damping wheel can be flexibly changed by adjusting the screw, thereby adjusting the frictional damping force. This can effectively buffer the lifting speed of the gravity roller, avoid the impact caused by sudden changes in filter cloth tension, make the tensioning process more stable, and can flexibly adapt to damping requirements according to different working conditions.

[0034] In another preferred embodiment, the chain 6 is divided into two sections, with a tensioner 9 connected in series between the two sections. When the chain is divided into two sections and a tensioner is connected in series, it can promptly compensate for the stretching and slack of the chain caused by long-term use, always maintain a good meshing state between the chain and the sprocket, ensure that the transmission efficiency does not decrease, and at the same time reduce wear caused by excessive chain slack, thus extending the service life of the chain.

[0035] In another preferred embodiment, the tensioner 9 is a spring. When the tensioner is a spring, the elastic characteristics of the spring can automatically adapt to the slight stretching of the chain, continuously providing a stable tension force to the chain, eliminating the need for frequent manual adjustments, simplifying the maintenance process of the device, and adapting to the dynamic tension changes during the operation of the filter cloth.

[0036] In another preferred embodiment, the tensioner 9 includes a connecting plate with an axially vertical tensioning screw screwed onto it. The connecting plate and the tensioning screw screw are respectively fixed to the connecting plate and the two chain segments 6 at their connecting ends. When the tensioner consists of a connecting plate and a tensioning screw screw, the tension of the chain can be precisely adjusted by rotating the tensioning screw screw. This allows for flexible adaptation to the tension requirements of filter cloths of different materials and thicknesses. The rigid structural design ensures stability even under high tension conditions, thus expanding the applicability of the device.

[0037] In another preferred embodiment, the chain 6 is a roller chain, and the upper sprocket 4 and lower sprocket 5 have 20-30 teeth each, meshing properly with the chain 6. When the chain is a roller chain and the sprockets have 20-30 teeth, the meshing degree between the chain and the sprockets is higher, the transmission process is smoother, and the transmission impact caused by poor meshing can be reduced. This is suitable for the working intensity of the filter press and effectively extends the service life of the sprockets and chain.

[0038] In another preferred embodiment, the guide rail 2 has a T-shaped cross-section, and the slider has a T-shaped groove adapted to the T-shaped guide rail. The slider and the guide rail 2 form an anti-detachment sliding fit through the T-shaped groove. When the guide rail has a T-shaped cross-section and the slider has a T-shaped groove, the anti-detachment characteristic of the T-shaped structure can prevent the slider from detaching from the guide rail during the lifting and lowering of the gravity roller, enhancing the reliability of the connection between the guide rail and the slider. Especially under the condition that the gravity roller is heavy, it can significantly improve the structural safety of the device.

[0039] In another preferred embodiment, both ends of the gravity roller 1 are rotatably connected to the slide block 3 via deep groove ball bearings, with the outer ring of the bearing having an interference fit with the slide block 3 and the inner ring having a transition fit with the shaft end of the gravity roller 1. When the gravity roller is connected to the slide block via deep groove ball bearings and a specific fit is adopted, the deep groove ball bearings can simultaneously withstand radial and axial forces. The combination of interference fit and transition fit ensures both the flexibility of the gravity roller's rotation and the stability of the assembly, reduces bearing wear, and extends the smooth operation time of the gravity roller.

[0040] In another preferred embodiment, both ends of the through shaft 7 are mounted on the frame 100 via seated bearings, and the base of the seated bearings is bolted to the frame 100. When the through shaft is mounted via seated bearings, the seated bearings can provide stable support for the through shaft, improve the installation accuracy of the through shaft, reduce the deflection of the through shaft during rotation, ensure that the synchronous transmission accuracy of the sprocket is not affected, and extend the service life of the through shaft.

[0041] In another preferred embodiment, the outer circumferential surface of the gravity roller 1 is uniformly distributed with axial anti-slip patterns, the depth of which is 0.5-1mm. When the gravity roller has anti-slip patterns on its outer circumference, these patterns increase the friction between the gravity roller and the filter cloth, preventing localized slippage during relative movement, reducing filter cloth wear, and adapting to various filter cloth materials such as cotton and synthetic fibers, thus expanding the applicability of the device.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gravity-tensioned filter cloth device for a belt filter press, comprising a gravity roller (1), wherein the axis of the gravity roller (1) is horizontal and the gravity roller (1) is rotatably mounted on the frame (100) of the belt filter press, and the gravity roller (1) is also rotatable about its own axis, while the gravity roller (1) is freely movable in the vertical direction; at least one section of the filter cloth (200) is wound around the outer circumference of the gravity roller (1), and the gravity roller (1) applies a downward tension force in the vertical direction to the filter cloth (200) wound thereon by its own gravity, characterized in that, The front and rear sides of the frame (100) are respectively fixed with guide rails (2) extending in the vertical direction. The slider that slides with the guide rails (2) is fixed with a slide block (3). The gravity roller (1) is rotated in the middle of the slide block (3). The upper sprocket (4) and the lower sprocket (5) are respectively rotated on the frame (100) outside the upper and lower ends of the guide rails (2). The two ends of the chain (6) pass around the upper sprocket (4) and the lower sprocket (5) respectively and are fixed to the slide block (3). The two upper sprockets (4) and / or the two lower sprockets (5) are fixedly connected by a through shaft (7).

2. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, It also includes a damping mechanism (8), which includes a damping wheel (81) fixed on the outside of the lower sprocket (5) and coaxially fixed to the lower sprocket (5), an adjusting screw (83) screwed to the frame (100) and whose axial direction is consistent with the axial direction of the lower sprocket (5), and a damping plate (82) fixed to the inner end of the adjusting screw (83), the damping plate (82) abutting against the end face of the damping wheel (81).

3. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, The chain (6) is divided into two sections, and a tensioner (9) is connected in series between the two sections.

4. The gravity-tensioned filter cloth device for a belt filter press according to claim 3, characterized in that, The tensioner (9) is a spring.

5. The gravity-tensioned filter cloth device for a belt filter press according to claim 3, characterized in that, The tensioner (9) includes a connecting plate, on which a tensioning screw with an axial verticality is screwed. The connecting plate and the tensioning screw are respectively fixed at the serial ends of the two segments of the chain (6).

6. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, The chain (6) is a roller chain, and the upper sprocket (4) and lower sprocket (5) have 20-30 teeth and are meshed with the chain (6).

7. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, The guide rail (2) has a T-shaped cross section, and the slider is provided with a T-shaped groove that is adapted to the T-shaped guide rail. The slider and the guide rail (2) form an anti-slip sliding fit through the T-shaped groove.

8. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, The two ends of the gravity roller (1) are rotatably connected to the slide block (3) through deep groove ball bearings, and the outer ring of the bearing is interference-fitted with the slide block (3), while the inner ring is transition-fitted with the shaft head of the gravity roller (1).

9. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, The two ends of the through shaft (7) are mounted on the frame (100) by bearing seats, and the base of the bearing seats is bolted to the frame (100).

10. The gravity-tensioned filter cloth device for a belt filter press according to claim 1, characterized in that, The outer circumferential surface of the gravity roller (1) is uniformly distributed with anti-slip patterns along the axial direction, and the depth of the anti-slip patterns is 0.5-1mm.

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