Non-wearing up-driving spiral sludge dewatering device

Abstract

The utility model discloses a no wearing upper drive spiral sludge dewatering device relates to sludge dewatering equipment technical field, including main drive motor, gear drop mud tank, main driven spiral shaft, fixed dynamic ring piece group. Be equipped with dynamic ring drive mechanism above fixed dynamic ring piece group, and the movement conversion mechanism of dynamic ring drive mechanism will rotate the rotation of rotating transmission shaft and convert into plane swing. The input of arc movement output assembly is connected movement conversion mechanism, and the output is vertically through dynamic ring piece group. Two -way limit guide structure restricts the horizontal degree of freedom of arc movement output assembly bottom. Among them, movement conversion mechanism and arc movement output assembly cooperate, make dynamic ring piece group make arc reciprocating motion between fixed ring piece group, and dynamic ring piece group and driving spiral shaft and driven spiral shaft keep non -contact state, completely eliminate wear and tear, and the whole mechanism is located outside filtrate splashing area, and the structure is compact, and the cost is low, and the maintenance is convenient, and the filtrate passage is unobstructed, and effectively improve dewatering efficiency and equipment life.

Description

Technical Field

[0001] This utility model relates to the technical field of sludge dewatering equipment, specifically to a wear-free upper-drive spiral sludge dewatering device. Background Technology

[0002] Screw extrusion sludge dewatering machine is a commonly used solid-liquid separation device in sewage treatment plants, municipal sewage treatment and industrial wastewater treatment. Its working principle is to use the coaxially arranged active screw shaft and driven screw shaft to continuously squeeze the sludge, so that the filtrate is discharged through the gap between the ring plates, and the solid particles move along the direction of the screw shaft and finally fall out.

[0003] In existing screw extrusion sludge dewatering devices, the movement of the rotating ring is achieved through displacement via contact with the screw shaft. During operation, wear occurs between the ring and the screw shaft, shortening the equipment's lifespan. Furthermore, current technologies often employ a bottom-drive mechanism for the rotating ring, resulting in numerous support points and high manufacturing costs. The support components are located below the filter body, requiring corrosion protection for the transmission components, further increasing manufacturing costs and complicating maintenance. Additionally, the presence of the bottom ring drive prevents the equipment's height from being reduced, increases the area of ​​the outer protective cover, and obstructs the sludge discharge by the drive rod, hindering smooth sludge flow.

[0004] For example, the screw extrusion sludge dewatering machine disclosed in the prior art CN101781076A drives the rotating ring plate to move up and down relative to each other through contact between the screw shaft and the rotating ring plate, so as to achieve filtrate discharge and solid separation. However, in this structure, the rotating ring plate constantly rubs against the screw shaft during operation, resulting in damage to the surfaces of the rotating ring and the screw shaft, which significantly restricts the service life and operational stability of the equipment; at the same time, the friction parts are prone to clogging, increasing the frequency and cost of maintenance and replacement of the ring plate.

[0005] To overcome the wear problem caused by direct contact between the moving ring and the screw shaft, the existing technology CN102887618B discloses a wear-free screw press sludge dewatering machine with a bottom-driven moving ring mechanism. This mechanism uses transmission components such as chains and sliders to drive the ring from below, avoiding direct friction between the ring and the screw shaft. However, this solution has a complex structure due to the drive component being located at the bottom of the equipment. Numerous support rods are distributed in the filtrate splash area, requiring the transmission components to use corrosion-resistant materials and undergo sealing protection, significantly increasing manufacturing costs and maintenance difficulty. Furthermore, the presence of the lower ring drive device prevents effective reduction in equipment height, increases the area of ​​the outer protective cover, and obstructs the sludge falling section with the drive rods. The bottom drive rods also hinder sludge cake detachment, affecting sludge discharge efficiency and the overall compactness of the equipment.

[0006] In summary, existing technologies struggle to completely eliminate wear between the moving ring and the screw shaft. Furthermore, while traditional downward-drive structures can avoid ring wear, they introduce a series of new problems, including structural complexity, high cost, difficult maintenance, large equipment height, and poor sludge discharge. Achieving a simple structure, controllable cost, convenient maintenance, and balancing equipment height with smooth sludge discharge while ensuring contactless and wear-free operation remains a critical technical bottleneck to be addressed in this field. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a wear-free, top-driven spiral sludge dewatering device. This device avoids wear between the moving ring and the spiral shaft, and its top-driven design simplifies the structure, reduces manufacturing costs, and facilitates maintenance.

[0008] The technical solution of this utility model is as follows:

[0009] A wear-free, top-driven spiral sludge dewatering device includes a main drive motor, a gear-driven sludge collection box, a driving spiral shaft, a driven spiral shaft, a feed box, a fixed ring plate assembly, and a moving ring plate assembly. The output end of the main drive motor is driven and connected to the input shaft of the gear-driven sludge collection box, and the output end of the gear-driven sludge collection box is driven and connected to the driving spiral shaft and the driven spiral shaft arranged in the same plane. The feed box is located at the feed end of the driving spiral shaft and the driven spiral shaft. The fixed ring plate assembly is fixedly installed on the inner wall of the equipment housing, and the moving ring plate assembly is movably arranged between the fixed ring plate assemblies. It also includes a moving ring drive mechanism located above the filter ring plate assembly. This moving ring drive mechanism includes an independently driven power source, a rotary transmission shaft driven by the power source, a motion conversion mechanism, an arc-shaped motion output assembly, and a bidirectional limiting guide structure. The motion conversion mechanism converts the rotational motion of the rotary transmission shaft into planar oscillation. The input end of the arc-shaped motion output assembly is connected to the motion conversion mechanism, and the output end vertically penetrates the moving ring plate assembly. The bidirectional limiting guide structure constrains the horizontal degree of freedom of the bottom of the arc-shaped motion output assembly. The motion conversion mechanism and the arc-shaped motion output component work together to make the moving ring plate group reciprocate in an arc between the fixed ring plate group, and the moving ring plate group maintains a non-contact state with the driving screw shaft and the driven screw shaft.

[0010] Furthermore, the motion conversion mechanism includes an eccentric element sleeved on the rotary transmission shaft, a seated bearing disposed at the outer end of the eccentric element, a rolling element, a swing link, a curved groove disposed on the swing link, and an axial limiting pin. The rotary transmission shaft rotates to drive the eccentric element to rotate. The axial limiting pin passes through the rolling element and the eccentric element in sequence, and the eccentric element drives the rolling element to perform circular motion through the axial limiting pin. The rolling element is disposed in the curved groove of the swing link, converting the circular motion of the eccentric element into the planar swing of the swing link.

[0011] Furthermore, the rolling element is a needle roller bearing, whose outer ring forms a rolling fit with the curved groove, driving the swinging connecting rod to swing around the hinge support.

[0012] Furthermore, the arc-shaped motion output component includes an upper lifting shaft and a lower guide shaft arranged coaxially, wherein the upper lifting shaft is hinged to the motion conversion mechanism and the lower guide shaft extends to a bidirectional limiting guide structure.

[0013] Furthermore, the bidirectional limiting and guiding structure is a waist-shaped groove limiting block, whose U-shaped groove forms a sliding fit with the lower guide shaft. The lower guide shaft of the moving ring plate moves up and down within the U-shaped groove of the limiting block to prevent the bottom of the moving ring plate from shifting left and right. This converts the rotational motion of the geared motor into the up and down motion of the moving ring plate.

[0014] Furthermore, the power source is a parallel shaft geared motor with adjustable speed, and the eccentric element is an eccentric shaft; the entire moving ring drive mechanism is located above the filtration section of the equipment, and all transmission components are located outside the filtrate splashing area. By adjusting the speed of the parallel shaft geared motor, the speed of the eccentric wheel and the oscillation frequency of the connecting rod can be flexibly changed, thereby adjusting the reciprocating speed of the moving ring plate to meet the optimal dewatering effect under different sludge moisture content and particle characteristics, and has stronger versatility and on-site commissioning convenience.

[0015] Furthermore, the swing linkage is an L-shaped rigid rod, with its long arm end hinged to the arc-shaped motion output component and its short arm end provided with a curved slide groove.

[0016] Furthermore, the moving ring plate group and the fixed ring plate group are stacked alternately along the axial direction, with each moving ring plate embedded in the gap between adjacent fixed ring plates. The bottom of the moving ring plate group has no mechanical support structure, and its effective filtration area covers the entire projection area of ​​the ring plate.

[0017] Furthermore, the eccentricity of the eccentric element is equal to the distance the moving ring moves up and down. Through a long swing radius structure, the stroke can be significantly increased. When the swing radius of the L-shaped connecting rod is lengthened, within the limits of the mechanical structure, the required vertical movement distance of the moving ring can be matched by appropriately increasing the eccentricity of the eccentric element. This achieves a larger stroke without increasing the motor speed or adding a complex transmission amplification mechanism, thus balancing dehydration depth and smooth movement.

[0018] Compared with the prior art, the present invention achieves the following beneficial technical effects:

[0019] This utility model's moving ring drive mechanism is located above the filter rings, eliminating the need for complex support components such as chains and sliders in the lower filtrate splash area. This reduces the number of parts and material usage, significantly lowering manufacturing costs. All transmission components are located outside the filtrate splash area, allowing the use of conventional materials without the need for corrosion-resistant treatment or sealing protection. Maintenance and debugging are more convenient and quicker without disassembling the lower structure. The use of an independent upper drive mechanism enables contactless operation between the moving rings and the spiral shaft, completely avoiding frictional wear between the rings and the spiral shaft, extending equipment lifespan, and reducing maintenance and replacement frequency. Eliminating the traditional lower ring drive device and bottom support rods significantly reduces the overall height of the equipment and the size of the outer protective cover, ensuring an unobstructed sludge discharge channel and smoother sludge cake detachment. The absence of a mechanical support structure at the bottom of the moving ring assembly increases the effective filtration area.

[0020] This invention cleverly achieves the conversion of rotational to linear motion through a moving ring drive mechanism. It utilizes a parallel shaft geared motor with adjustable speed to drive the transmission shaft to rotate, which in turn drives the eccentric element fitted on it to rotate. The eccentric element drives the needle roller bearing to make circumferential motion through an axial limiting pin. The needle roller bearing rolls in the curved groove on the L-shaped connecting rod, accurately converting the circumferential motion into the planar oscillation of the connecting rod. This, in turn, drives the upper lifting shaft to make arc reciprocating motion through the hinge support. This successfully converts the continuous rotation of the geared motor into the arc reciprocating oscillation motion of the moving ring plate. The structure has a short transmission chain and high efficiency.

[0021] This invention uses needle roller bearings to replace sliding friction, significantly reducing wear. The needle roller bearings bear eccentric motion, replacing all the sliding friction commonly found in the original moving ring drive with rolling friction. This not only reduces frictional resistance and increases transmission efficiency, but also significantly extends the service life of each transmission component and ring plate, completely solving the problem of loss and blockage caused by high-frequency friction between the moving ring plate and the drive mechanism in the prior art.

[0022] The lower guide shaft of this utility model cooperates with the U-shaped limiting block to ensure the positioning accuracy of the component. The lower guide shaft extends vertically along the bottom of the moving ring plate group and slides in the U-shaped groove of the waist-shaped groove limiting block to constrain the horizontal degree of freedom, ensuring that the moving ring plate does not shift laterally or get stuck during the reciprocating process, thereby improving the operating stability and filtration uniformity of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the wear-free upper-drive spiral sludge dewatering device of this utility model.

[0024] Figure 2 This is a frontal schematic diagram of the wear-free upper-drive spiral sludge dewatering device of this utility model.

[0025] Figure 3 for Figure 2 Cross-sectional view of CC.

[0026] Figure 4 for Figure 2 Cross-sectional view of DD.

[0027] Figure 5 This is a top-down schematic diagram of the wear-free, top-driven spiral sludge dewatering device of this utility model.

[0028] Figure 6 This is a schematic diagram of the dynamic ring drive mechanism.

[0029] Figure 7 This is an assembly structure diagram of the moving ring drive mechanism.

[0030] Figure 8 This is a frontal schematic diagram of the moving ring drive mechanism.

[0031] Figure 9 This is a side view of the wear-free upper-drive spiral sludge dewatering device of this utility model.

[0032] Figure 10 This is a schematic diagram of the structure of the ring plate's motion trajectory. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0034] like Figures 1 to 10 As shown, this utility model provides a wear-free, top-driven spiral sludge dewatering device, including a main drive motor 1, a gear-driven sludge collection box 2, a driving spiral shaft 3a, a driven spiral shaft 3b, a feed box 4, a fixed ring plate group 5, and a moving ring plate group 6. The output end of the main drive motor 1 is driven and connected to the input shaft of the gear-driven sludge collection box 2. The output end of the gear-driven sludge collection box 2 is driven and connected to the driving spiral shaft 3a and the driven spiral shaft 3b respectively, and the two spiral shafts are arranged in the same plane. The feed box 4 is located at the feed end of the driving spiral shaft 3a and the driven spiral shaft 3b. The fixed ring plate group 5 is fixedly installed on the inner wall of the equipment housing, and the moving ring plate group 6 is movably arranged between the fixed ring plate group 5. The moving ring plate group 6 and the fixed ring plate group 5 are alternately stacked along the axial direction, and each moving ring plate is embedded in the gap between adjacent fixed ring plates.

[0035] As a key improvement of this utility model, a moving ring drive mechanism 7 is provided above the filter ring assembly. The moving ring drive mechanism 7 includes an independently driven power source 7a (such as a parallel shaft geared motor), a rotary transmission shaft 8 driven by the power source 7a, a motion conversion mechanism 9, an arc-shaped motion output component 10, and a bidirectional limiting guide structure 11.

[0036] The motion conversion mechanism 9 includes an eccentric element 9a (such as an eccentric shaft), a mounted bearing 9b, a rolling element 9c (such as a needle roller bearing), a swing link 9d, a curved groove 9e, an axial limiting pin 9f, and a hinge support 9g. The eccentric element 9a is sleeved on the rotary transmission shaft 8, and the rotation of the rotary transmission shaft 8 drives the eccentric element 9a to rotate. The axial limiting pin 9f passes through the rolling element 9c and the eccentric element 9a in sequence, causing the eccentric element 9a to drive the rolling element 9c to perform circular motion via the axial limiting pin 9f. The rolling element 9c is located within the curved groove 9e of the swing link 9d, converting the circular motion into the swinging motion of the swing link 9d about the plane of the hinge support 9g. The swing link 9d is designed as an L-shaped rigid rod, with its long arm hinged to the arc-shaped motion output assembly 10, and its short arm equipped with the curved groove 9e.

[0037] The arc-shaped motion output assembly 10 includes an upper lifting shaft 10a and a lower guide shaft 10b coaxially arranged. The upper end of the upper lifting shaft 10a is hinged to the long arm end of the swing link 9d, and the lower end is fixedly connected to the moving ring plate assembly 6. The upper end of the lower guide shaft 10b is fixedly connected to the moving ring plate assembly 6, and the lower end extends to the bidirectional limiting guide structure 11. The bidirectional limiting guide structure 11 is a waist-shaped groove limiting block, whose U-shaped groove 11a forms a sliding fit with the lower guide shaft 10b, constraining the horizontal degree of freedom of the bottom of the lower guide shaft 10b, so that it can only move in the vertical direction.

[0038] To facilitate understanding of the above technical solutions of this utility model, the following detailed description of the above technical solutions of this utility model is provided through specific usage methods.

[0039] The specific working process is as follows: The power source 7a (parallel shaft reduction motor) of the moving ring drive mechanism 7 drives the rotary transmission shaft 8 to rotate, and the rotary transmission shaft 8 drives the eccentric element 9a of the motion conversion mechanism 9 to rotate. The eccentric element 9a drives the rolling element 9c to perform circumferential motion through the axial limiting pin 9f. The rolling element 9c rolls in the curved slide groove 9e of the swing link 9d, pushing the swing link 9d to swing in a plane around the hinge support 9g. The long arm end of the swing link 9d drives the upper lifting shaft 10a to move up and down, thereby driving the moving ring plate group 6 to perform arc reciprocating motion. At the same time, the lower guide shaft 10b slides up and down in the U-shaped groove 11a of the bidirectional limiting guide structure 11 to prevent the bottom of the moving ring plate group 6 from shifting left and right. Since the moving ring plate group 6 is driven independently by the moving ring drive mechanism 7 and has no contact with the spiral shafts 3a and 3b, wear is avoided.

[0040] Adjusting the rotational speed of power source 7a can change the frequency of the up-and-down movement of the moving ring plate assembly 6 to adapt to the dewatering requirements of different materials. The eccentricity of the eccentric element 9a is equal to the distance the moving ring plate assembly 6 moves up and down, so the stroke of the moving ring plate assembly 6 can be controlled by designing a suitable eccentricity.

[0041] The rotating ring drive mechanism 7 of this invention is located entirely above the filtration section of the equipment, and the transmission components do not contact the filtrate, thus requiring no special anti-corrosion treatment. The rotating ring plate assembly 6 has no mechanical support structure at its bottom, increasing the effective filtration area. There are no drive rods below the sludge collection box, ensuring smooth sludge discharge.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do 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. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" 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; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0043] It should be noted that in this invention, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features of the present invention.

Claims

1. A wear-free, top-driven spiral sludge dewatering device, comprising a main drive motor (1), the output end of which is drivenly connected to the input shaft of a gear sludge box (2), the output end of which is drivenly connected to a driving spiral shaft (3a) and a driven spiral shaft (3b) arranged in the same plane, a feed box (4) is disposed at the feed ends of the driving spiral shaft (3a) and the driven spiral shaft (3b), a fixed ring plate group (5) is fixedly installed on the inner wall of the equipment housing, and a moving ring plate group (6) is movably disposed between the fixed ring plate groups (5); characterized in that, It also includes a moving ring drive mechanism (7) disposed above the filter ring assembly, the moving ring drive mechanism (7) comprising: Independently driven power source (7a); A rotary transmission shaft (8) driven by the power source; The motion conversion mechanism (9) converts the rotational motion of the rotary transmission shaft (8) into planar oscillation; An arc-shaped motion output component (10) has its input end connected to the motion conversion mechanism (9) and its output end perpendicularly passing through the moving ring plate group (6). A bidirectional limiting guide structure (11) constrains the horizontal degree of freedom at the bottom of the arc-shaped motion output component (10); The motion conversion mechanism (9) and the arc motion output component (10) work together to make the moving ring plate group (6) reciprocate in an arc between the fixed ring plate group (5), and the moving ring plate group (6) maintains a non-contact state with the active screw shaft (3a) and the driven screw shaft (3b).

2. The wear-free upper-drive spiral sludge dewatering device according to claim 1, characterized in that, The motion conversion mechanism (9) includes: An eccentric element (9a) is sleeved on a rotary transmission shaft (8), and the rotary transmission shaft (8) rotates to drive the eccentric element (9a) to rotate. A mounted bearing (9b) is located at the outer end of the eccentric element (9a); A rolling element (9c) is disposed in a curved groove (9e) on a swing link (9d) to convert the circular motion constraint of the eccentric element (9a) into the planar swing of the swing link (9d). The swing link (9d) and the curved groove (9e) provided on the swing link (9d); The axial limiting pin (9f) passes through the rolling element (9c) and the eccentric element (9a) in sequence. The eccentric element (9a) drives the rolling element (9c) to make a circular motion through the axial limiting pin (9f).

3. The wear-free upper-drive spiral sludge dewatering device according to claim 2, characterized in that, The rolling element (9c) is a needle roller bearing, and its outer ring forms a rolling fit with the curved groove (9e), which drives the swing link (9d) to swing around the hinge support (9g).

4. The wear-free upper-drive spiral sludge dewatering device according to claim 1, characterized in that, The arc-shaped motion output assembly (10) includes an upper lifting shaft (10a) and a lower guide shaft (10b) arranged coaxially, wherein the upper lifting shaft (10a) is hinged to the motion conversion mechanism (9), and the lower guide shaft (10b) extends to the bidirectional limiting guide structure (11).

5. The wear-free upper-drive spiral sludge dewatering device according to claim 4, characterized in that, The bidirectional limiting guide structure (11) is a waist-shaped groove limiting block, and its U-shaped groove (11a) forms a sliding fit with the lower guide shaft (10b).

6. The wear-free upper-drive spiral sludge dewatering device according to claim 2, characterized in that, The power source (7a) is a parallel shaft geared motor with adjustable speed, and the eccentric element (9a) is an eccentric shaft; the dynamic ring drive mechanism (7) is located above the filter section of the equipment, and all transmission components are located outside the filtrate splashing area.

7. The wear-free upper-drive spiral sludge dewatering device according to claim 2, characterized in that, The swing link (9d) is an L-shaped rigid rod, with its long arm end hinged to the arc-shaped motion output component (10) and its short arm end provided with a curved slide groove (9e).

8. The wear-free upper-drive spiral sludge dewatering device according to claim 1, characterized in that, The moving ring plate group (6) and the fixed ring plate group (5) are stacked alternately along the axial direction, with each moving ring plate embedded in the gap between adjacent fixed ring plates. The bottom of the moving ring plate group (6) has no mechanical support structure.

9. The wear-free upper-drive spiral sludge dewatering device according to claim 2, characterized in that, The eccentricity of the eccentric element (9a) is equal to the distance the moving ring moves up and down.

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