Mortise joint lining center shaft of disc filter

Abstract

The utility model belongs to the technical field of disc type filters, and particularly discloses a joggle joint lining center shaft of a disc type filter, which comprises a shaft body, a plurality of runners extending along the axial direction of the shaft body are arranged in the shaft body, special-shaped liners are respectively arranged in the runners in a matched mode, the special-shaped liners comprise a plurality of lining assemblies which are connected along the axial direction of the runners, and the lining assemblies are arranged in the shaft body. The adjacent lining assemblies are connected through mortise and tenon joint structures which are arranged in a matched mode, cavities in the middles of the lining assemblies are communicated with one another to jointly form a slurry channel for slurry to flow, and due to the sectional design of the special-shaped lining, the phenomena of brittle cracking and stripping caused by thermal stress of the whole ceramic tube are thoroughly avoided; the sectional joggle joint design of the special-shaped linings ensures accurate positioning of the adjacent ceramic special-shaped pipe sections in the axial direction and the circumferential direction, the concentricity, the connecting strength and the sealing performance of the linings are good, and the special-shaped lining is particularly suitable for a filter to filter high-abrasiveness and high-corrosivity slurry.

Description

TECHNICAL FIELD

[0001] The utility model belongs to disc filter technical field, specifically disclose a disc filter's mortise joint lining center shaft. BACKGROUND

[0002] It is known that disc filter is mainly used for the filtration dewatering of alumina seed liquid of alumina plant in non-ferrous metal industry, coal slime of coal industry and flotation concentrate of various mines;Disc filter forms filter cake on filter cloth of filter plate through the suction of vacuum pump, and filtrate is discharged in turn through filter cloth, inner cavity of filter plate and flow channel of center shaft, so as to achieve the purpose of solid-liquid separation.

[0003] Center shaft is the main component of disc filter, and the flow channel of center shaft mainly has two structural forms: one flow channel form is tubular flow channel, and the flow channel is a full-length circular tube, and the cross section of the circular tube is circular, and since the cross-sectional area of the circular tube is small, the designability is poor in the arrangement of the flow channel, and in addition, due to the limitation of standard diameter steel pipe, the matching of flow channel area and filtration area is poor;The other flow channel form is a special-shaped shaft structure welded by steel plates, and the steel plates are partition plates, and the partition plates, center tube and outer cover plate form a fan-shaped cross-sectional flow channel, and the flow channel of the special-shaped shaft can be designed non-standard according to the properties of the material, and the material adaptability is better, but for some materials with hard slurry particles and large abrasion of the main shaft flow channel, the lining of the special-shaped shaft flow channel cannot be stably installed and has the risk of deformation or peeling, which reduces the service life of the center shaft, and once the filter cloth is damaged, the abrasive material enters the flow channel, and these media have strong abrasiveness to the inner wall of the metal flow channel, which leads to the short service life of the ordinary metal shaft body and frequent replacement, and further leads to frequent shutdown of the equipment, production stagnation and influence on the normal production. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problems in the background art, the utility model discloses a mortise joint lining center shaft of disc filter, which comprises a shaft body and a special-shaped lining corresponding arranged in the flow channel of the shaft body, the special-shaped lining comprises a plurality of lining assemblies connected by mortise and tenon structure, the lining assemblies are connected by mortise and tenon structure, and the cavities in the middle of the lining assemblies are connected to each other to form a slurry channel.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] A mortise joint lining center shaft of disc filter, comprising a shaft body, a plurality of flow channels extending along the axial direction of the shaft body are arranged in the shaft body, and a special-shaped lining is arranged in each flow channel, the special-shaped lining comprises a plurality of lining assemblies arranged along the axial direction of the flow channel, the lining assemblies are connected by a mortise and tenon structure, and the cavities in the middle of the lining assemblies are connected to each other to form a slurry channel.

[0007] Further, the mortise and tenon joint inner lining center shaft of the disc filter, the cross section of the inner lining assembly is a structure similar to a sector or a trapezoid.

[0008] Further, the mortise and tenon joint inner lining center shaft of the disc filter, the cross section of the inner lining assembly is a structure similar to a sector or a trapezoid.

[0009] Further, the mortise and tenon joint inner lining center shaft of the disc filter, the cross section of the inner lining assembly is a structure similar to a sector or a trapezoid.

[0010] Further, the mortise and tenon joint inner lining center shaft of the disc filter, the cross section of the inner lining assembly is a structure similar to a sector or a trapezoid.

[0011] Further, the mortise and tenon joint inner lining center shaft of the disc filter, the cross section of the inner lining assembly is a structure similar to a sector or a trapezoid.

[0012] Compared with the prior art, the disc filter has the advantages that:

[0013] 1. Good wear resistance and long service life: the inner surface of the flow channel is uniformly distributed with high-performance engineering ceramics, which fundamentally solves the problems of easy wear and corrosion of the metal flow channel, and the service life can be extended by several times to several tens of times;

[0014] 2. Excellent thermal shock resistance: the segmented design of the special-shaped lining divides the whole long ceramic pipe into multiple short ceramic special-shaped pipe sections, which is convenient to install, and each section can independently expand and contract in a small range, thereby effectively absorbing and releasing the thermal stress generated between the metal and the ceramic due to the different thermal expansion coefficients, completely avoiding the brittle cracking and peeling phenomenon of the whole ceramic pipe caused by thermal stress.

[0015] 3. Excellent connection reliability and sealing: the segmented mortise-tenon joint design of the profiled inner liner, the mortise-tenon joint formed by the protrusions and the grooves, ensures the accurate positioning of the adjacent ceramic profiled pipe segments in the axial and circumferential directions, prevents misalignment and rotation during use, and the inner liner has good concentricity, connection strength and sealing performance, is particularly suitable for filtering high-abrasive and high-corrosive slurry by the filter, and meanwhile, the connection forms a "labyrinth" sealing path, effectively prevents high-pressure fluid from directly impacting the joint, and improves the overall sealing performance and erosion resistance;

[0016] 4. Good manufacturing process and low cost: the short ceramic profiled pipe segments with profiled cross sections have much lower difficulty and waste rate than the whole long pipe in the processes of mold manufacturing, pressing forming and high-temperature sintering, and significantly reduce the manufacturing cost;

[0017] 5. Easy maintenance and good economy: when the flow channel is partially damaged, the entire shaft or the inner liner does not need to be replaced, and only the damaged single or several ceramic profiled pipe segments need to be positioned and replaced, so that the maintenance cost and downtime are greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a perspective structural schematic view of the mortise-tenon joint inner liner central shaft of the disc filter of the present application;

[0019] Figure 2 is a perspective structural schematic view of the shaft body in the present application;

[0020] Figure 3 is a perspective structural schematic view of the profiled inner liner in the present application;

[0021] Figure 4 is a cross-sectional structural schematic view of the profiled inner liner in the present application;

[0022] In the above figures: 1 - shaft body; 1.1 - outer cover plate; 1.2 - flow channel; 1.3 - central pipe; 2 - profiled inner liner; 2.1 - first inner liner assembly; 2.2 - second inner liner assembly; 2.21 - protrusion; 2.22 - groove; 2.3 - fan plate mounting hole; 2.4 - third inner liner assembly. DETAILED DESCRIPTION

[0023] In order to better understand the present application, the content of the present application will be further illustrated below in combination with examples, but the content of the present application is not limited to the following examples only.

[0024] In the description of the utility model, unless another definite provision and limitation, the term "a plurality of" represents two and two or more, the term "connect", "connect", "fix" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or the interaction relationship of two elements.For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0025] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0026] In the description of the embodiment, the orientation or position relationship of the terms "on", "under", "left", "right" and the like is based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0027] In combination with the accompanying Figures 1-4 , a mortise lining center shaft of a disc filter is described in detail, including shaft body 1, the shaft body 1 includes outer cover plate 1.1 and center tube 1.3, a plurality of independent flow channels 1.2 extending along the axial direction of the shaft body 1 are spliced by steel plates between the outer cover plate 1.1 and the center tube 1.3, a plurality of special-shaped linings 2 are respectively arranged in the flow channels 1.2, the special-shaped linings 2 include a plurality of lining assemblies arranged in the axial direction of the flow channels 1.2, the mortise and tenon structure in the form of matching convex 2.21 and groove 2.22 is connected between adjacent lining assemblies, the cavities in the middle of the lining assemblies are communicated with each other to form a slurry channel for slurry flow;

[0028] The mortise and tenon joint inner lining center shaft of the disc filter is characterized in that the inner lining assembly is in an integrated structure after splicing, the inner surface of the flow channel is fully protected by high-performance wear-resistant material, wear of the flow channel is avoided, the service life of the center shaft is greatly prolonged, the special-shaped inner lining 2 is designed in a splicing mode, the whole special-shaped inner lining 2 is decomposed into a plurality of short inner lining assemblies, each inner lining assembly can independently expand and contract in a small range, thereby effectively absorbing and releasing thermal stress generated between the shaft body 1 and the special-shaped inner lining 2 due to different thermal expansion coefficients, brittle cracking and peeling of the whole special-shaped inner lining 2 caused by thermal stress are avoided, the inner lining assemblies are connected through the matching mortise and tenon structure, the accurate positioning of the adjacent inner lining assemblies in the axial and circumferential directions is ensured, misplacement and rotation in the use process are prevented, meanwhile, the connection forms a "labyrinth" sealing path, direct impact of high-pressure fluid on the joint is effectively hindered, the sealing performance and the erosion resistance of the whole are improved, when the special-shaped inner lining 2 is locally damaged, the whole shaft body 1 or the special-shaped inner lining 2 does not need to be replaced, only the damaged single or several inner lining assemblies need to be positioned and replaced, thereby greatly reducing the maintenance cost and downtime.

[0029] As an optional design, preferably the mortise and tenon joint inner lining center shaft of the disc filter, the inner lining assembly is a ceramic special-shaped pipe or a wear-resistant special-shaped steel pipe; both the ceramic special-shaped pipe and the wear-resistant special-shaped steel pipe have high hardness and chemical inertness, and can support the main shaft in the flow channel to protect the main shaft, wherein the ceramic material is the best choice due to its extremely high hardness and chemical inertness, the special-shaped inner lining 2 in the utility model comprises a plurality of inner lining assemblies made of ceramic material and arranged in the axial direction of the flow channel 1.2, the adjacent inner lining assemblies are connected through the matching mortise and tenon structure in the form of the protrusion 2.21 and the groove 2.22, not only the defects such as multiple ceramic piece joints, easy falling off under fluid impact, discontinuous surface and easy leakage and wear at the joints are avoided, but also the problems such as difficulty in forming the whole ceramic special-shaped pipe for the flow channel with a special-shaped section, low sintering yield, high cost are solved, most importantly, the thermal expansion coefficient difference between the metal matrix and the ceramic lining is huge, when the equipment starts and stops or the working condition temperature changes, the thermal stress generated will cause the whole ceramic special-shaped pipe to crack or separate from the metal matrix, resulting in failure; the segmented design decomposes the whole long ceramic pipe into a plurality of short ceramic special-shaped pipe segments, each segment can independently expand and contract in a small range, thereby effectively absorbing and releasing the thermal stress generated between the metal and the ceramic due to different thermal expansion coefficients, brittle cracking and peeling of the whole ceramic special-shaped pipe caused by thermal stress are completely avoided.

[0030] As an optional design, preferably the mortise and tenon joint inner lining center shaft of the disc filter, the cross section of the inner lining assembly is a structure similar to a fan shape or a trapezoidal shape, which is designed according to the specific fluid medium characteristics, and is helpful to reduce the flow dead zone, reduce the pressure loss and improve the conveying efficiency.

[0031] As an optional design, the tenon joint inner lining center shaft of the disc filter is preferably provided with a first inner lining assembly 2.1, a third inner lining assembly 2.4 and a plurality of second inner lining assemblies 2.2, the first inner lining assembly 2.1 is arranged at the head of the flow channel 1.2, the second inner lining assembly 2.2 is arranged at the middle of the flow channel 1.2, both ends of the first inner lining assembly 2.1 and the second inner lining assembly 2.2 are open, the third inner lining assembly 2.4 is arranged at the tail of the flow channel 1.2, the head of the third inner lining assembly 2.4 is open, the tail is closed, the short ceramic special-shaped pipe segment with a special-shaped section has a difficulty and a waste rate far lower than those of the whole long pipe in the processes of mold manufacturing, press forming and high-temperature sintering, and the manufacturing cost is significantly reduced, the joint surfaces of the adjacent inner lining assemblies are provided with the matched tenon-mortise structures, the tenon-mortise connection formed by the protrusions and the grooves ensures the accurate positioning of the adjacent ceramic special-shaped pipe segments in the axial and circumferential directions and prevents the dislocation and rotation in the use process. Meanwhile, the connection forms a "labyrinth" sealing path, effectively hinders the direct impact of the high-pressure fluid on the joint, and improves the overall sealing performance and the erosion resistance, the flow channel 1.2 is provided with a fan-shaped plate mounting hole 2.3 at a position corresponding to the fan-shaped plate, the fan-shaped plate mounting hole 2.3 is communicated with the slurry channel, and the flow of the filtrate is ensured.

[0032] As an optional design, the tenon joint inner lining center shaft of the disc filter is preferably provided with a first inner lining assembly 2.1, a third inner lining assembly 2.4 and a plurality of second inner lining assemblies 2.2, the first inner lining assembly 2.1 is arranged at the head of the flow channel 1.2, the second inner lining assembly 2.2 is arranged at the middle of the flow channel 1.2, both ends of the first inner lining assembly 2.1 and the second inner lining assembly 2.2 are open, the third inner lining assembly 2.4 is arranged at the tail of the flow channel 1.2, the head of the third inner lining assembly 2.4 is open, the tail is closed, the short ceramic special-shaped pipe segment with a special-shaped section has a difficulty and a waste rate far lower than those of the whole long pipe in the processes of mold manufacturing, press forming and high-temperature sintering, and the manufacturing cost is significantly reduced, the joint surfaces of the adjacent inner lining assemblies are provided with the matched tenon-mortise structures, the tenon-mortise connection formed by the protrusions and the grooves ensures the accurate positioning of the adjacent ceramic special-shaped pipe segments in the axial and circumferential directions and prevents the dislocation and rotation in the use process. Meanwhile, the connection forms a "labyrinth" sealing path, effectively hinders the direct impact of the high-pressure fluid on the joint, and improves the overall sealing performance and the erosion resistance, the flow channel 1.2 is provided with a fan-shaped plate mounting hole 2.3 at a position corresponding to the fan-shaped plate, the fan-shaped plate mounting hole 2.3 is communicated with the slurry channel, and the flow of the filtrate is ensured.

[0033] As an optional design, the tenon joint inner lining center shaft of the disc filter is preferably provided with a first inner lining assembly 2.1, a third inner lining assembly 2.4 and a plurality of second inner lining assemblies 2.2, the first inner lining assembly 2.1 is arranged at the head of the flow channel 1.2, the second inner lining assembly 2.2 is arranged at the middle of the flow channel 1.2, both ends of the first inner lining assembly 2.1 and the second inner lining assembly 2.2 are open, the third inner lining assembly 2.4 is arranged at the tail of the flow channel 1.2, the head of the third inner lining assembly 2.4 is open, the tail is closed, the short ceramic special-shaped pipe segment with a special-shaped section has a difficulty and a waste rate far lower than those of the whole long pipe in the processes of mold manufacturing, press forming and high-temperature sintering, and the manufacturing cost is significantly reduced, the joint surfaces of the adjacent inner lining assemblies are provided with the matched tenon-mortise structures, the tenon-mortise connection formed by the protrusions and the grooves ensures the accurate positioning of the adjacent ceramic special-shaped pipe segments in the axial and circumferential directions and prevents the dislocation and rotation in the use process. Meanwhile, the connection forms a "labyrinth" sealing path, effectively hinders the direct impact of the high-pressure fluid on the joint, and improves the overall sealing performance and the erosion resistance, the flow channel 1.2 is provided with a fan-shaped plate mounting hole 2.3 at a position corresponding to the fan-shaped plate, the fan-shaped plate mounting hole 2.3 is communicated with the slurry channel, and the flow of the filtrate is ensured.

[0034] The working process of the utility model is as follows:

[0035] During installation, the third inner lining assembly 2.4 is first installed at the tail of the flow channel 1.2, then the second inner lining assembly 2.2 is tenon-jointed at the head of the third inner lining assembly 2.4, the plurality of second inner lining assemblies 2.2 are sequentially connected, finally the tail of the first inner lining assembly 2.1 is tenon-jointed with the adjacent second inner lining assembly 2.2, and then the inner lining assemblies in other flow channels are sequentially installed, and finally the adhesive is filled between the special-shaped inner lining 2 and the inner wall of the shaft body 1.

[0036] The above description is only the application implementation manner of the present application, but the protection scope of the present application is not limited to this, and the protection scope of the present application cannot be limited by this, and any equivalent change according to the technical scheme of the present application should be covered in the protection scope of the present application.

Claims

1. A mortise lining center shaft of a disc filter, comprising a shaft body, a plurality of flow channels are arranged in the shaft body and extend along the axial direction of the shaft body, characterized in that: The flow channel is provided with a specially-shaped inner liner which is provided with a plurality of inner liner assemblies arranged along the axial direction of the flow channel, and the adjacent inner liner assemblies are connected by a specially-shaped mortise and tenon structure.

2. The dowelled liner center shaft for disc filters according to claim 1, characterized in that The inner liner assembly is a specially-shaped ceramic pipe or a specially-shaped wear-resistant steel pipe.

3. A dowelled lining centre shaft for a disc filter according to claim 1 or 2, characterised in that: The cross section of the inner liner assembly is a structure similar to a sector or a trapezoid.

4. The dowelled liner center shaft for disc filters according to claim 3, characterized in that: The inner liner assembly includes a first inner liner assembly, a third inner liner assembly and a plurality of second inner liner assemblies, the first inner liner assembly is arranged at the head of the flow channel, the second inner liner assemblies are arranged at the middle part of the flow channel, the first inner liner assembly and the second inner liner assembly are both open at both ends, the third inner liner assembly is arranged at the tail of the flow channel, the head of the third inner liner assembly is open and the tail is closed, the abutting surface of the adjacent inner liner assemblies is provided with a mortise and tenon structure in the form of a specially-shaped protrusion and groove, the sector plate mounting hole is arranged at the position corresponding to the sector plate on the second inner liner assembly, and the sector plate mounting hole is communicated with the slurry channel.

5. The dowelled liner center shaft for disc filters according to claim 3, characterized in that in The inner liner assembly is respectively provided with a single-layer slurry channel or a multi-layer slurry layer channel which extends along the axial direction of the flow channel, the slurry layer channels are arranged in layers along the radial direction of the shaft body, and the connecting holes are arranged between the adjacent layers of slurry layer channels, and the slurry layer channels jointly form the slurry channel for the slurry to flow.

6. The dowelled liner center shaft for disc filters according to claim 3, characterized in that: The specially-shaped inner liner and the inner wall of the shaft body are filled with an adhesive.

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