A distribution head for a disc filter

Abstract

A distribution head of a disc filter is matched with a dynamic distribution pad on a central shaft, the distribution head comprising a static distribution valve body and a static distribution pad; the side of the distribution valve body is provided with a suction dry pipe, a suction liquid pipe and a blowing pipe; the middle of the distribution valve body is provided with a bushing matched with the central shaft; the static distribution pad is detachably fixed to the inner side of the distribution valve body, and the end face of the static distribution pad is in sealing contact with the dynamic distribution pad; the static distribution pad is provided with a central hole matched with the flow channel of the central shaft; the static distribution pad is provided with a perforated area distributed along the circumference thereof, the perforated area comprising a suction dry area, a suction liquid area and a blowing area respectively corresponding to the suction dry pipe, the suction liquid pipe and the blowing pipe for communication, and a blind area formed between adjacent perforated areas; the suction dry area and the blowing area are above the liquid level, and the suction liquid area is below the liquid level. The static distribution pad is additionally arranged between the distribution valve body and the dynamic distribution pad, and has good wear resistance and lubricating capacity; after wear, only the static distribution pad needs to be replaced, and the replacement cost is low.

Description

Technical Field

[0001] This invention relates to the field of disc filter technology, specifically to a distribution head for a disc filter. Background Technology

[0002] Disc vacuum filters are dewatering devices used for solid-liquid separation, widely applied in aluminum hydroxide seed filtration and mineral processing industries both domestically and internationally. The disc vacuum filter uses a vacuum pump to draw the slurry onto the filter cloth of the filter plates, forming a filter cake. The filtrate then passes sequentially through the filter cloth, the inner cavity of the filter plates, and the flow channels of the central shaft, before being discharged through a distribution head, achieving solid-liquid separation. The distribution head, located at the end of the central shaft, remains stationary during operation and connects the central shaft flow channels to the vacuum pipeline of the gas-liquid separator and the compressed air pipeline. By setting appropriate angle ranges, each sector plate flow channel is connected to a vacuum or compressed air within a designated range during one cycle, achieving the functions of cake suction, dewatering, and unloading.

[0003] In disc filters, the distributor head is a wear part, especially when processing highly abrasive materials such as iron ore. The distributor head is cast in one piece, with the distribution valve body directly contacting the moving distribution pad. The end face of the distribution valve body, the high-speed scouring parts of the distributor head's suction pipe, and the junction of the airflow and suction are extremely prone to wear. Once wear is severe, the entire distribution valve body needs to be scrapped and replaced. However, the replacement cycle for the distributor head is relatively long, resulting in high costs and severely impacting equipment operating rates, causing significant production disruptions. Furthermore, insufficient lubrication frequently leads to oil shortages and slurry leakage between the distributor head and the moving distribution pad on the central shaft. Summary of the Invention

[0004] The purpose of this invention is to provide a distribution head for a disc filter, which adds a static distribution pad between the distribution valve body and the moving distribution pad, and has good wear resistance and lubrication ability. After wear, only the static distribution pad needs to be replaced, resulting in low replacement cost.

[0005] The technical solution adopted in this invention is: a distribution head for a disc filter, which cooperates with a moving distribution pad on a central shaft, the distribution head comprising a stationary distribution valve body and a stationary distribution pad; The side of the distribution valve body is equipped with a suction tube, a liquid suction tube, and a blower tube; The distribution valve body has a bushing in the middle that mates with the central shaft; The static distribution pad is detachably fixed to the inner side of the distribution valve body, and the end faces of the static distribution pad and the dynamic distribution pad are in sealed contact. The static distribution pad is provided with a central hole that matches the central axis flow channel; The static distribution pad has perforated areas distributed along its circumference. The perforated areas include a drying area, a liquid absorption area, and a blowing area that are respectively connected to the suction tube, the liquid suction tube, and the blowing tube. A blind area is formed between adjacent perforated areas. The drying zone and the blowing zone are above the liquid surface, while the liquid absorption zone is below the liquid surface.

[0006] As a preferred embodiment, the absorbent area includes absorbent area one and absorbent area two; The second drying zone is located between the first drying zone and the blowing zone, and the circumferential width of the second drying zone is smaller than that of the first drying zone.

[0007] As a preferred embodiment, the blind zone includes blind zone one located between the blowing zone and the drying zone two, blind zone two located between the drying zone two and the drying zone one, and blind zone three located between the drying zone one and the liquid absorption zone; wherein, the width of blind zone one is greater than the width of blind zone two and the width of blind zone three.

[0008] As a preferred embodiment, the disc filter is equipped with a spring assembly that compresses the distribution valve body to make the moving distribution pad and the stationary distribution pad elastically contact each other.

[0009] As a preferred option, an oil seal is installed between the dynamic distribution pad and the static distribution pad.

[0010] As a preferred embodiment, the oil seal includes an inner oil groove, an outer oil groove, and an outer oil suction ring arranged sequentially in a radially outward direction on the end face of the static distribution pad; the inner oil groove is located between the perforated area and the central hole of the static distribution pad; the outer oil groove and the outer oil suction ring are located outside the perforated area of ​​the static distribution pad.

[0011] As a preferred embodiment, the static distribution pad is provided with an axially penetrating inner ring waste oil hole, which is located inside the inner ring oil groove.

[0012] As a preferred option, the distribution valve body is provided with an inspection port, and the inspection port is provided with an openable and closable observation plug.

[0013] As a preferred option, the suction tube, the liquid suction tube and the external flange tube are connected by a rubber sealing tube, and the joint of the rubber sealing tube is tightened by a hose clamp.

[0014] As a preferred embodiment, the length directions of the suction tube, the liquid suction tube, and the blower tube are parallel to the axial direction of the distribution valve body, and the area inside the distribution valve body corresponding to the suction area and the liquid suction area is provided with wear-resistant material.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The distribution valve body and the static distribution gasket are fixed by bolts. Once worn, only the static distribution gasket needs to be replaced, reducing the replacement cycle and replacement cost.

[0016] 2. The high-speed flushing area of ​​the pipeline in the distribution valve body is made of wear-resistant material, which can improve the service life of the distribution valve body.

[0017] 3. The static distribution pad effectively solves the problems of insufficient lubrication and leakage between the distribution head and the dynamic distribution pad by setting inner and outer ring U-shaped oil grooves, inner ring waste oil hole and outer ring oil suction ring, thus ensuring lubrication and sealing between the sealing surfaces.

[0018] 4. The distribution head of the present invention has a simple structure, is easy to manufacture and has a short production cycle. It effectively solves the problems of the distribution head of disc filter being not wear-resistant and being inconvenient to replace after wear. It has high application and promotion value and is especially suitable for mining filter machines with high wear resistance requirements. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a right-side view of the present invention; Figure 2 This is a front view schematic diagram of the present invention; Figure 3 This is a schematic diagram of the left side of the present invention; Figure 4 for Figure 3 AA schematic diagram of the static distribution pad; Figure 5 This is a diagram of the bushing and seal of the present invention.

[0021] Figure label: 1. Distribution valve body; 101. Suction tube; 102. Liquid suction tube; 103. Air blower; 104. Observation plug; 2. Static distribution pad; 201. Inner ring oil groove; 202. Outer ring oil groove; 203. Inner ring waste oil hole; 204. Outer ring oil suction ring; 205. Drying zone one; 206. Drying zone two; 207. Liquid suction zone; 208. Air blowing zone; 209. Blind zone; 2091. Blind zone one; 2092. Blind zone two; 2093. Blind zone three; 2094. Blind zone four; 3. Connecting bolt assembly; 4. Bushing; 5. Spring assembly; 6. Rubber sealing tube; 7. Flange pipe; 8. Hoof clamp; 9. Anti-rotation device; 10. Tightening device; 11. Wear-resistant material; 12. Central axis; 13. Dynamic distribution pad; 14. Nylon baffle; 15. Sealing gasket. Detailed Implementation

[0022] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0023] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," etc., used in the specification and claims of this patent application do not express a limitation on quantity, but rather indicate the presence of at least one; the terms "first," "second," and "third," as used herein, should not be considered as a limitation on the order of components, but are merely for distinguishing different components; the terms "comprising," "including," etc., indicate that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0024] To more clearly describe the distribution head of this disc filter, in conjunction with the attached... Figure 1-5 This embodiment is described as follows: like Figure 1-5 As shown, a distribution head of a disc filter mates with a moving distribution pad 13 on a central shaft 12. The distribution head includes a stationary distribution valve body 1 and a stationary distribution pad 2. The side of the distribution valve body 1 is provided with a suction pipe 101, a liquid suction pipe 102, and a blower pipe 103. The middle of the distribution valve body 1 is provided with a bushing 4 that mates with the central shaft 12. The end of the bushing 4 is provided with a nylon baffle 14 and a sealing gasket 15. The stationary distribution pad 2 is disc-shaped and is detachably fixed to the inner side of the distribution valve body 1 by a connecting bolt group 3. The end face of the stationary distribution pad 2 is in sealing contact with the moving distribution pad 13. The upper part is provided with a central hole that matches the flow channel of the central shaft 12; the static distribution pad 2 has perforated areas distributed along its circumference. The perforated areas include a drying area, a liquid absorption area 207 and a blowing area 208 that are respectively connected to the drying pipe 101, the liquid absorption pipe 102 and the blowing pipe 103. A blind area 209 is formed between adjacent perforated areas. The proportion of each perforated area is determined according to the material test to improve the production capacity while reducing the moisture of the filter cake; the distribution valve body 1 is arranged horizontally and partially immersed in the liquid, wherein the drying area and the blowing area 208 are above the liquid surface, and the liquid absorption area 207 is below the liquid surface.

[0025] The distribution valve body 1 is specifically connected to the static distribution pad 2 via the connecting bolt group 3. If the wear is too great after long-term use, simply remove the connecting bolt group 3 and replace the static distribution pad 2 directly.

[0026] The distribution valve body 1 is a cast structure with uniform wall thickness. Its interior is divided into multiple non-interconnected fan-shaped flow channels, each corresponding to a perforated area on the static distribution pad 2. Each fan-shaped flow channel forms a flow-through annular area for filtrate or air blowing. Both the filtrate and air blowing channels are streamlined, ensuring smoother filtrate flow and air blowing. A bushing 4 is embedded inside the distribution valve body 1. The end of the central shaft 12 extends into and rotates within the bushing 4. The bushing 4 is a wear-resistant bushing, improving wear resistance and saving mold costs and reducing production costs during mass production. The bushing 4 penetrates the distribution valve body 1, fitting tightly. Lubrication holes are provided on the bushing 4 to ensure sufficient lubrication between the bushing 4 and the central shaft 12. The outer side of the bushing 4 is sealed with a nylon baffle 14 and a sealing gasket 15 to prevent excess lubricating oil from overflowing.

[0027] The distribution valve body 1 is provided with an inspection port, and the inspection port is provided with an openable and closable observation plug 104. The observation plug 104 may be made of glass, allowing the condition inside the distribution valve body 1 to be viewed without disassembly. If there is material accumulation or blockage inside the distribution valve body 1, the observation plug 104 can be removed and the material can be cleaned through the inspection port.

[0028] The lengths of the suction pipe 101, the liquid suction pipe 102, and the air blowing pipe 103 are parallel to the axial direction of the distribution valve body 1, ensuring smoother flow of filtrate and air blowing. The area inside the distribution valve body 1 corresponding to the suction zone and the liquid suction zone 207 is a high-speed scouring area, where wear-resistant material 11 is provided to further extend the service life of the distribution valve body. The suction pipe 101 and the liquid suction pipe 102 are connected to the external flange pipe 7 via a rubber sealing pipe 6. The joint of the rubber sealing pipe 6 is tightened by a hose clamp 8 to ensure the pipe's sealing performance. The air blowing pipe 103 is connected to the air blowing pipe via a flange, and the blowing time is controlled by a solenoid valve.

[0029] Since the distribution valve body 1 and the static distribution pad 2 need to remain stationary, an anti-rotation device 9 and a tightening device 10 are installed on the side of the distribution valve body 1 to prevent the distribution head from rotating with the central shaft. The anti-rotation device 9 is specifically an anti-rotation block, which is connected to the distribution valve body 1 and the frame of the disc filter. There are two tightening devices 10, consisting of tightening blocks and tightening bolts, located on both sides of the anti-rotation device 9, which work together with the anti-rotation device 9 to ensure the stability of the distribution valve body 1 in the working state.

[0030] The suction zone includes suction zone one 205 and suction zone two 206. The two suction zones of the static distribution pad 2 correspond to two suction pipes 101, which are positioned at the lowest point of the suction zone and at the lowest point of the fan-shaped flow channel of the distribution valve body 1 corresponding to the suction zone, ensuring no liquid accumulation. Suction zone two 206 is located between suction zone one 205 and the blowing zone 208, and its circumferential width is smaller than that of suction zone one 205. Most of the liquid is discharged through the larger suction zone one 205, while the smaller suction zone two 206, closer to the blowing zone 208, is the remaining small portion of liquid discharged through suction zone two 206.

[0031] The first drying zone 205, the second drying zone 206, the liquid absorption zone 207, and the air blowing zone 208 are all arc-shaped grooves. The two ends of the arc-shaped grooves are chamfered to ensure uniform force distribution.

[0032] The blowing zone 208 is located between the smaller drying zone and the liquid absorption zone, and its cross-sectional shape is trapezoidal.

[0033] Blind zones 209 include blind zone one 2091 between the blowing zone 208 and the second suction zone 206, blind zone two 2092 between the second suction zone 206 and the first suction zone 205, blind zone three 2093 between the first suction zone 205 and the liquid suction zone 207, and blind zone four 2094 between the second suction zone 206 and the liquid suction zone 207. The width of blind zone one 2091 is greater than the widths of blind zone two 2092 and blind zone three 2093. This is to increase the area of ​​the transition zone at the junction of the blowing and suction zones, prevent cavitation between positive and negative pressures, reduce wear, and extend the life of the distribution valve body. The main function of blind zone four 2094 is to achieve dual vacuum, with the liquid suction vacuum and suction vacuum being relatively independent and adjustable. The spacing of blind zone two 2092 between the two suction zones helps to clean accumulated material on the distribution pad and protect the gap in the blowing zone.

[0034] The disc filter housing or support is equipped with a spring assembly 5 that compresses the distribution valve body 1, causing the moving distribution pad 13 to elastically contact the stationary distribution pad 2. Four lifting lugs are provided along the circumference of the distribution valve body 1 for mounting the spring assembly 5 to adjust the gap between the distribution head and the central shaft 12, ensuring effective sealing and compensating for wear on the mating surfaces to prevent leakage.

[0035] Specifically, the spring assembly 5 includes a pull rod, a spring, and a bolt, with a washer between the spring and the bolt. One end of the pull rod is fixed to the disc filter, and the other end passes through the hole of the lifting lug. The bolt is connected to the threaded part of one end of the pull rod. The spring is fitted onto the pull rod between the bolt and the lifting lug. The spring is a compression spring, and the compression degree of the spring can be adjusted by the bolt, thereby adjusting the magnitude of the force exerted by the static distribution pad 2 towards the dynamic distribution pad 13, thus controlling the size of the gap between the dynamic distribution pad 13 and the static distribution pad 2.

[0036] An oil seal is installed between the dynamic distribution pad 13 and the static distribution pad 2. The oil seal can improve the sealing performance of the sealing surfaces of the two pads and reduce wear caused by friction.

[0037] The oil seal includes an inner oil groove 201, an outer oil groove 202, and an outer oil suction ring 204 arranged sequentially along the radial direction on the end face of the static distribution pad 2. The inner oil groove 201 is located between the perforated area and the center hole of the static distribution pad 2; the outer oil groove 202 and the outer oil suction ring 204 are located outside the perforated area of ​​the static distribution pad 2. The outer oil suction ring 204 is a V-shaped groove that can form a vacuum ring effect. Excess waste oil and waste liquid are sucked into the groove by the suction effect of the vacuum ring, ensuring the sealing performance between the sealing surfaces of the static distribution pad 2 and the dynamic distribution pad 13, and preventing leakage of liquid and oil.

[0038] Both the inner ring oil groove 201 and the outer ring oil groove 202 are U-shaped, which can increase the oil storage capacity of the sealing surface, so that it can be fully lubricated with the moving distribution pad 13 of the central shaft 12, and extend the service life of the static distribution pad 2 and the moving distribution pad 13.

[0039] The static distribution pad 2 has an axially penetrating inner ring waste oil hole 203, which is located inside the inner ring oil groove 201. The distribution valve body 1 has an independent waste oil pipe / hole connecting to its outer surface, and the inner ring waste oil hole 203 is only connected to this waste oil pipe / hole. Waste oil and waste liquid can be discharged from the inner ring waste oil hole 203 to the outside of the distribution head, preventing waste oil and waste liquid from accumulating and forming crusts between the sealing surfaces of the static distribution pad 2 and the dynamic distribution pad 13. Accumulated waste oil and waste liquid will form an internal high-pressure zone, making it impossible to adjust the gap between the distribution head and the distribution pad properly.

[0040] The parts not described in detail in the above embodiments are existing technologies.

[0041] It should be noted that although the present invention has been described through the above embodiments, the present invention may have many other embodiments. Without departing from the spirit and scope of the present invention, those skilled in the art can obviously make various corresponding changes and modifications to the present invention, but all such changes and modifications should fall within the scope of protection of the appended claims and their equivalents.

Claims

1. A distribution head for a disc filter, which cooperates with a movable distribution pad (13) on a central shaft (12), characterized in that, The distribution head includes a stationary distribution valve body (1) and a stationary distribution pad (2); The side of the distribution valve body (1) is provided with a suction tube (101), a liquid suction tube (102) and a blower tube (103); the middle part of the distribution valve body (1) is provided with a bushing (4) that mates with the central shaft (12). The static distribution pad (2) is detachably fixed to the inner side of the distribution valve body (1), and the static distribution pad (2) is in sealing contact with the end face of the dynamic distribution pad (13); the static distribution pad (2) is provided with a central hole that matches the flow channel of the central shaft (12); The static distribution pad (2) has perforated areas distributed along its circumference. The perforated areas include a drying area, a liquid absorption area (207), and a blowing area (208) that are respectively connected to the drying tube (101), the liquid absorption tube (102), and the blowing tube (103). A blind area (209) is formed between adjacent perforated areas. The drying area and the blowing area (208) are above the liquid surface, and the liquid absorption area (207) is below the liquid surface. The drying area includes drying area one (205) and drying area two (206); drying area two (206) is located between drying area one (205) and air blowing area (208), and the circumferential width of drying area two (206) is smaller than the circumferential width of drying area one (205); the blind area (209) includes blind area one (2091) located between air blowing area (208) and drying area two (206), blind area two (2092) located between drying area two (206) and drying area one (205), and blind area three (2093) located between drying area one (205) and liquid absorption area (207); wherein, the width of blind area one (2091) is greater than the width of blind area two (2092) and the width of blind area three (2093); An oil seal is provided between the dynamic distribution pad (13) and the static distribution pad (2); the oil seal includes an inner ring oil groove (201), an outer ring oil groove (202) and an outer ring oil suction ring (204) arranged sequentially in the radial direction on the end face of the static distribution pad (2); the inner ring oil groove (201) is located between the perforated area and the center hole of the static distribution pad (2); the outer ring oil groove (202) and the outer ring oil suction ring (204) are located outside the perforated area of ​​the static distribution pad (2); the static distribution pad (2) is provided with an axially penetrating inner ring waste oil hole (203), and the inner ring waste oil hole (203) is located inside the inner ring oil groove (201).

2. The distribution head of a disc filter according to claim 1, characterized in that: The disc filter is equipped with a spring assembly (5) that compresses the distribution valve body (1) so that the moving distribution pad (13) and the stationary distribution pad (2) come into elastic contact.

3. The distribution head of a disc filter according to claim 1, characterized in that: The distribution valve body (1) is provided with an inspection port, and the inspection port is provided with an openable and closable observation plug (104).

4. The distribution head of a disc filter according to claim 1, characterized in that: The suction tube (101) and the liquid suction tube (102) are connected to the external flange tube (7) through the rubber sealing tube (6), and the joint of the rubber sealing tube (6) is tightened by the hose clamp (8).

5. The distribution head of a disc filter according to claim 1, characterized in that: The length direction of the suction tube (101), the liquid suction tube (102) and the blower tube (103) is parallel to the axial direction of the distribution valve body (1), and the area inside the distribution valve body (1) corresponding to the suction area and the liquid suction area (207) is provided with wear-resistant material (11).

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