Detachable special-shaped flow channel central shaft of mining disc filter

Abstract

The invention relates to a detachable special-shaped flow channel central shaft of a mining disc filter, which comprises a central cylinder, an annular plate is arranged in the middle of the central cylinder, and a plurality of detachable special-shaped flow channels are respectively arranged on the central cylinder on two sides of the annular plate. The runner is placed on the runner supporting ring and is radially fixed through the runner locking ring and the tensioning device, end face flanges are arranged at the two ends of the center cylinder respectively, the outer end of the runner is inserted into special-shaped holes in the end face flanges, and the inner end of the runner is axially jacked through a jacking device arranged on an annular plate. And the whole central shaft is simple in structure, easy to manufacture and short in production period, solves the problems that the central shaft of the filter cannot be detached and is inconvenient to replace after being abraded, and is more suitable for mining filters with higher requirements on wear resistance.

Description

Technical Field

[0001] The invention relates to the field of disc filters, in particular to a detachable special-shaped flow channel central axis of a mining disc filter. Background Art

[0002] Disc vacuum filters are dehydration equipment used for solid-liquid separation and have seen rapid development in recent years, becoming widely used in aluminum hydroxide seed filtration and the mineral processing industry. In mining filters, due to the highly abrasive and sticky nature of the slurry and the fine particle size of the material, the filter cloth is easily clogged, resulting in a short service life of 20 to 30 days. Mining filters require continuous operation, and filter cloths are often not replaced in a timely manner, resulting in defective operation. Damaged filter cloths can allow slurry to enter the central shaft flow channel, causing wear on the central shaft.

[0003] The flow channels of the center shaft of traditional mining filters are roughly divided into seamless steel tube type and special-shaped shaft welded type structures. The seamless steel tube type structure is extremely easy to wear due to its small diameter, and is limited by the center shaft structure of the tubular flow channel, making it impossible to scale up the filter. The welded flow channel of the center shaft of the special-shaped flow channel is lined with wear-resistant materials, which is difficult to manufacture, has high production costs, and a long production cycle. During use, the service life is short, the flow channel wears quickly, and it cannot be replaced after wear, resulting in the entire center shaft being scrapped, which greatly increases the cost of use and maintenance, limits the technical application and development of the center shaft of the special-shaped flow channel, and seriously affects production. Summary of the Invention

[0004] In view of the defects of the prior art, the present invention provides a detachable special-shaped flow channel center shaft of a mining disc filter. The detachable special-shaped flow channel solves the problem of inconvenience and high replacement cost of the disc filter center shaft after wear.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A detachable special-shaped flow channel center axis of a mining disc filter includes a center cylinder, a ring plate is provided in the middle of the center cylinder, and several flow channels are arranged on the center cylinder on both sides of the ring plate, the flow channels extend axially along the center cylinder and are arranged in the circumferential direction of the center cylinder. The flow channel is a detachable flow channel with a special-shaped cross-section, and a plurality of flow channel support rings are axially arranged on the outside of the center cylinder, and a plurality of reinforcing ribs are radially distributed on the outer side of each flow channel support ring along the circumferential direction. The reinforcing ribs and the flow channel support ring constitute a space for installing the flow channel, and the flow channel is placed in the space and radially fixed by a flow channel locking ring and a tightening device. End face flanges are respectively provided at both ends of the center cylinder, and special-shaped holes corresponding to the flow channels are provided on the end face flanges. The outer end of the flow channel is inserted into the special-shaped hole on the end face flange, and the inner end is axially tightened by a tightening device provided on the ring plate.

[0006] Furthermore, the flow channel locking ring is a U-shaped structure, which is buckled on the outside of the flow channel. Each flow channel locking ring connects two flow channels. The tightening device is a long screw. A corresponding bolt fixing block is provided on the central cylinder. A bolt hole is provided in the middle of the flow channel locking ring. One end of the long screw is installed in the bolt fixing block, and the other end tightens the flow channel locking ring through a nut. The flow channel locking rings on the two adjacent circles of flow channel support rings are staggered.

[0007] Furthermore, the end of the flow channel close to the ring plate is a closed end, and the end close to the end face flange is an open end. The flow channels on both sides of the ring plate are staggered in the circumferential direction of the central cylinder.

[0008] Furthermore, the tightening device is a tightening bolt provided on the ring plate, and the tightening bolts correspond to the inner ends of the flow channels respectively. The axial tightening of the flow channels is achieved by tightening the tightening bolts.

[0009] Furthermore, the annular plate includes two annular surfaces parallel to each other, each annular surface is respectively provided with a tightening bolt corresponding to an adjacent side flow channel, and each flow channel corresponds to at least two tightening bolts.

[0010] Furthermore, a sealing gasket is installed in the special-shaped hole of the end face flange. When the outer end of the flow channel is pressed into the special-shaped hole, the sealing gasket is pressed between the flow channel and the special-shaped hole, and resin glue is filled between the flow channel and the special-shaped hole of the end face flange for sealing and fixing.

[0011] Furthermore, a distribution pad is installed on the outside of the end face flange. The distribution pad is made of wear-resistant material and is connected to the end face flange by bolts.

[0012] Furthermore, each flow channel is processed with a plurality of filter plate mounting surfaces and filtrate holes, and a sector plate mounting block is welded to the outer side of the filter plate mounting surface for mounting the sector filter plate.

[0013] Furthermore, the central cylinder is a seamless steel pipe, a plurality of annular supports are arranged axially inside the central cylinder, and sleeves are respectively welded to both ends of the central cylinder for installing support shafts.

[0014] Furthermore, the cross section of the flow channel is trapezoidal, and the flow channel is lined with wear-resistant material.

[0015] Beneficial effects: The present invention adopts a detachable special-shaped flow channel center axis structure, and the flow channel is detachably installed on the center cylinder. After wear, the flow channel can be disassembled and replaced separately without replacing the entire center axis, thereby reducing maintenance and use costs; the flow channel cross-section is trapezoidal and the pipe diameter is large, which is conducive to the large-scale filter; the flow channel is lined with wear-resistant material, which can improve wear resistance and extend the service life of the center axis; the outer end of the detachable special-shaped flow channel is bonded to the end face flange by resin glue, which can ensure sealing and achieve detachability. This installation method simplifies the processing flow of the center axis, shortens the processing and manufacturing cycle of the center axis, saves labor time, and at the same time solves the problem that the flow channel is difficult to disassemble after wear.

[0016] The invention has a simple structure, is easy to manufacture, and has a short production cycle. It solves the problem that the central shaft of the filter cannot be disassembled and is inconvenient to replace after the central shaft is worn. It is particularly suitable for mining filters with high wear resistance requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall structure of the present invention; Figure 2 yes Figure 1 Partial structure diagram on the AA section.

[0018] Figure numerals: 1. Central cylinder; 2. Support shaft; 3. Flow channel support ring; 4. Flow channel; 5. Flow channel locking ring; 6. Tensioning device; 7. Tightening device; 8. End face flange; 9. Sealing gasket; 10. Distribution gasket; 11. Sleeve; 12. Sector plate mounting block; 13. Bolt fixing block; 14. Ring plate; 15 Reinforcing rib plate. DETAILED DESCRIPTION

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1-2 As shown, a detachable special-shaped flow channel center shaft of a mining disc filter is mainly composed of a central cylinder 1, support shafts 2 at both ends, a flow channel support ring 3, a flow channel 4, a flow channel locking ring 5, a tightening device 6, a tightening device 7, an end face flange 8, an end face sealing gasket 9, and a distribution gasket 10.

[0021] The central cylinder 1 supports the central axis. In this embodiment, the central cylinder 1 is a seamless steel pipe. In order to improve the strength, several annular supports are designed axially inside the steel pipe. Sleeves 11 are welded at both ends of the central cylinder 1, and the support shaft 2 is installed in the sleeves 11 on both sides of the central cylinder 1.

[0022] A ring plate 14 is provided in the middle of the central cylinder 1, dividing the central cylinder 1 into two sections. Several flow channels 4 are respectively installed on the central cylinder 1 on both sides of the ring plate 14. The flow channels 4 extend axially along the central cylinder 1 and are arranged around the circumference of the central cylinder 1. The flow channels 1 are detachable special-shaped flow channels with special-shaped cross-sections. In this embodiment, the cross-section of the flow channel 1 is trapezoidal, and the number of flow channels 1 is set according to the diameter of the filter disc (not shown in the figure) installed on the central axis. In this embodiment, the number of filter discs is m, the number of flow channels 4 is n, then the number of flow channel support rings 3 is m, and the flow channel locking rings 5 ​​have a total of m circles, with n / 2 flow channel locking rings 5 ​​in each circle.

[0023] The outside of the central cylinder 1 is welded with m flow channel support rings 3 in the axial direction. The flow channel support ring 3 is a circular ring. The outer side of each flow channel support ring 3 is evenly distributed with n reinforcing ribs 15 in a radial pattern along the circumferential direction. The reinforcing ribs 15 and the flow channel support ring 3 constitute a space for installing the flow channel 4. The flow channel 4 is placed in the space and is radially fixed by the flow channel locking ring 5 and the tensioning device 6. Specifically, the flow channel locking ring 5 is a welded U-shaped structure. The flow channel locking ring 5 is buckled on the outside of the flow channel 4. Each flow channel locking ring 5 fixes two flow channels 4. The tensioning device 6 The device 6 is a long screw, and a corresponding bolt fixing block 13 is provided on the central cylinder 1 (at the position where the bolt fixing block 13 is provided, the reinforcing rib 15 is notched for avoidance), and a bolt hole is provided in the middle of the flow channel locking ring 5. One end of the long screw is installed in the bolt fixing block 13, and the other end passes through the bolt hole and tightens the flow channel locking ring 5 through a nut. Each flow channel locking ring 5 cooperates with the tightening device 6 to fix the two flow channels 4. The flow channel locking ring 5 is provided with a total of m circles, with n / 2 in each circle, and the two adjacent circles of flow channel locking rings 5 ​​are staggered to increase reliability.

[0024] The inner end of the flow channel 4 close to the ring plate 14 is a closed end, and the outer end close to the end flange is an open end. The flow channels 4 located on both sides of the ring plate 14 are staggered in the circumferential direction of the central cylinder 1.

[0025] The two ends of the central cylinder 1 are also provided with end face flanges 8 and distribution pads 10. The end face flanges 10 are fixed on the central cylinder 1 of the central axis. The distribution pad 10 is made of wear-resistant material and is connected to the outer side of the end face flange 8 by bolts; the end face flange 8 is provided with a special-shaped hole corresponding to the cross-sectional shape of the flow channel 4. One side of the end face flange 8 is connected to the flow channel 4, and the other side is connected to the distribution pad 10. The distribution pad 10 is provided with a distribution hole corresponding to the flow channel 4. The tightening device 7 is arranged on the middle ring plate 14. The outer end of the flow channel 4 is inserted into the special-shaped hole on the end face flange 8, and the inner end is axially tightened by the tightening device 7.

[0026] In this embodiment, the end face flange 8 is made of thick steel plates welded together, and equi-angled special-shaped holes corresponding to the flow channel 4 are processed into a special-shaped hole. A sealing gasket 9 adapted to the shape of the flow channel 4 is installed in the special-shaped hole. When the flow channel 4 is tightened into the end face flange 8, the sealing gasket 9 is pressed between the flow channel 4 and the special-shaped hole to ensure sealing. In order to prevent thermal expansion or vibration during the operation of the central axis from affecting the sealing between the flow channels 4, after all the flow channels 4 are installed, the special-shaped holes of the end face flange 8 and the flow channels 4 are filled with resin glue. The resin glue has good fluidity, can achieve a good sealing effect, and does not affect the detachability of the flow channel 4.

[0027] The tightening device 7 is mainly used for tightening the end of the flow channel 4. The tightening device 7 is a tightening bolt provided on the ring plate 14. The ring plate 14 includes two parallel annular surfaces, and each annular surface is respectively provided with a tightening bolt corresponding to the adjacent side flow channel 4. Each flow channel 4 corresponds to at least two tightening bolts. By tightening the tightening bolts, the flow channel 4 is tightened to the end face flange 8, and then sealing is achieved by the sealing gasket 9 and resin glue.

[0028] The flow channel 4 can be welded or customized as a finished product. The interior of the flow channel 4 is lined with wear-resistant materials such as ceramics to increase its wear resistance. Each flow channel 4 is processed with multiple filter plate mounting surfaces and filtrate holes. During processing, an appropriate mold is used to maintain the unity of the flow channel 4. The fan-shaped plate mounting block 12 is welded on the filter plate mounting surface outside the flow channel 4 to install the fan-shaped filter plate. The position of the fan-shaped plate mounting block 12 is axially staggered from the position of the flow channel support ring 3. The flow channel 4 and the fan-shaped plate mounting block 12 need to be pre-welded and processed according to the mold before the flow channel 4 is installed on the flow channel support ring 3. On the support ring 3, one end is inserted into the special-shaped hole on the end face flange 10, and the other end is tightened by the tightening device 7 to tighten each flow channel 4. The outer side of the flow channel 4 is fixed to the tightening device 6 through the flow channel locking ring 5. The flow channel locking rings 5 ​​on the two adjacent circles of flow channel support rings 3 are arranged alternately. After the flow channel 4 is installed, the sector filter plate is installed on the sector plate mounting block 12 to form each filter disc. When the filter is working, the filtrate inside the filter plate enters the flow channels 4 of the central axis from the filtrate hole, flows out from the outer end of the flow channel 4, and enters the distribution head through the distribution hole on the distribution pad 10.

[0029] When a certain flow channel 4 wears out quickly and needs to be replaced, first remove the various fan-shaped filter plates on the flow channel 4, then remove the tensioning device 6, and then loosen the corresponding tightening device 7, and the flow channel 4 can be removed. It should be noted that the strength of the resin glue does not affect the disassembly of the flow channel.

[0030] The center shaft of the present invention adopts a detachable special-shaped flow channel, which makes the flow channel easy to maintain and replace, reducing the maintenance cost of the center shaft; the detachable special-shaped flow channel adopts a trapezoidal cross-section and a large pipe diameter, which is conducive to large-scale implementation, and the flow channel can be lined with wear-resistant materials such as ceramics to improve wear resistance and extend the service life of the center shaft; the center shaft adopts a two-stage setting, which can enable separate unloading of the two sides and facilitate tightening the flow channel from the middle to achieve detachable installation; in general, the center shaft of the present invention has a simple structure, is easy to make, and has a short production cycle, effectively solving the problem that the center shaft of the filter cannot be disassembled and the problem that the center shaft is inconvenient to replace after wear, and has a high value of use and promotion.

[0031] The parts not described in detail in this invention are prior art.

[0032] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the present profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content disclosed above without departing from the scope of the technical solution of the present invention. 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 content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A detachable special-shaped flow channel center shaft of a mining disc filter, comprising a central cylinder, a ring plate provided in the middle of the central cylinder, and a plurality of flow channels arranged on the central cylinder on both sides of the ring plate, the flow channels extending axially along the central cylinder and arranged around the circumference of the central cylinder, characterized in that: The flow channel is a detachable flow channel with an irregular cross-section. A plurality of flow channel support rings are axially arranged on the outside of the central cylinder. A plurality of reinforcing ribs are radially distributed on the outer side of each flow channel support ring in the circumferential direction. The reinforcing ribs and the flow channel support ring constitute a space for installing the flow channel. The flow channel is placed in the space and radially fixed by a flow channel locking ring and a tightening device. End face flanges are respectively provided at both ends of the central cylinder, and irregular holes corresponding to the flow channel are provided on the end face flanges. The outer end of the flow channel is inserted into the irregular hole on the end face flange, and the inner end is axially tightened by a tightening device provided on the ring plate.

2. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 1 is characterized in that: The flow channel locking ring is a U-shaped structure, which is buckled on the outside of the flow channel. Each flow channel locking ring connects two flow channels. The tightening device is a long screw. A corresponding bolt fixing block is provided on the central cylinder. A bolt hole is provided in the middle of the flow channel locking ring. One end of the long screw is installed in the bolt fixing block, and the other end tightens the flow channel locking ring through a nut. The flow channel locking rings on the two adjacent circles of flow channel support rings are staggered.

3. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 1 is characterized in that: The end of the flow channel close to the ring plate is a closed end, and the end close to the end face flange is an open end. The flow channels on both sides of the ring plate are staggered in the circumferential direction of the central cylinder.

4. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 3, characterized in that: The tightening device is a tightening bolt provided on the ring plate. The tightening bolts correspond to the inner ends of the flow channels respectively. The axial tightening of the flow channels is achieved by tightening the tightening bolts.

5. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 4, characterized in that: The annular plate includes two annular surfaces parallel to each other, each annular surface is respectively provided with a tightening bolt corresponding to an adjacent side flow channel, and each flow channel corresponds to at least two tightening bolts.

6. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 1, characterized in that: A sealing gasket is installed in the special-shaped hole of the end face flange. When the outer end of the flow channel is pressed into the special-shaped hole, the sealing gasket is pressed between the flow channel and the special-shaped hole, and resin glue is filled between the flow channel and the special-shaped hole of the end face flange to seal and fix them.

7. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 6, characterized in that: A distribution pad is installed on the outside of the end face flange. The distribution pad is made of wear-resistant material and is connected to the end face flange by bolts.

8. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 1, characterized in that: Each flow channel is processed with multiple filter plate mounting surfaces and filtrate holes, and the outer side of the filter plate mounting surface is welded with a sector plate mounting block for mounting the sector filter plate.

9. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 1, characterized in that: The central cylinder is a seamless steel pipe, and a plurality of annular supports are arranged axially inside the central cylinder. Sleeves are welded to both ends of the central cylinder for installing support shafts.

10. The detachable special-shaped flow channel center axis of a mining disc filter according to claim 1, characterized in that: The cross section of the flow channel is trapezoidal, and the flow channel is lined with wear-resistant material.

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