A two-point or multi-point supported piston pusher centrifuge drum assembly

Abstract

A two-point or multi-point supported piston pusher centrifuge drum assembly comprises a main shaft, a push rod, a drum with one end open and side wall holes, a pusher, a distributor, a drum support structure and a shaft sleeve; one end of the drum support structure is fixed on the shaft sleeve, and the other end is fixed on the drum wall of the drum; the push rod is a hollow tubular structure, and the main shaft and / or the push rod between the pusher and the distributor are provided with a material channel connected to the internal pipeline of the push rod, and the material enters the gap between the pusher and the distributor through the material channel and then enters the inside of the drum; the middle part of the main shaft, the push rod and the shaft sleeve is provided with a wash water channel connected to the inside of the push rod, and the wash water enters the inside of the drum through the wash water channel. Due to the adoption of a multi-point support structure and a unique feeding method, the drum has a large diameter, a fast rotation speed, a long filtration zone length, and a large number of drum stages, and has the advantages of not easy to vibrate, a large separation factor, a low moisture content of the filter residue, a small wash water equivalent, a large production capacity, and easy large-scale production.

Description

Technical Field

[0001] This patent relates to a centrifuge drum assembly, specifically a piston-pushing centrifuge drum assembly supported at two or more points. Background Art

[0002] Conventional piston pusher centrifuge is a continuous operation, pulsating unloading filtering centrifuge. Under high-speed operation, the material is continuously fed in through the feed pipe located at the axial discharge end of the drum, and flows along the feed distributor to the filter screen of the drum. The filtrate passes through the filter screen and is continuously discharged through the filtrate outlet, and the filter residue accumulated on the inner surface of the filter screen is pushed out along the inner wall of the drum by the pusher that reciprocates relative to the drum.

[0003] Since the material is fed in through the feed pipe located at the open end of the drum, the main shaft support of the above piston push centrifuge can only be made into a single-sided support, and the support structure is that the main shaft bearing is located on the same side of the drum. The support structure of the drum is a cantilever structure, one end of the drum is fixed on the main shaft or push rod, and the other end of the drum is a free end (which can generate forces parallel to the axial direction and perpendicular to the axial direction). The axial feed end of the drum wall is connected to the main shaft or push rod by the drum bottom (support structure) to support the drum, and there is no support structure connected to the main shaft or push rod to support the drum at the axial discharge end of the drum.

[0004] The above structure brings the following disadvantages: the stability of the single-side support is not as good as that of the double-point or multi-point support structure. The cantilever structure causes the free end of the drum to vibrate under the combined action of the forces parallel to the axial direction and perpendicular to the axial direction. In severe cases, the bottom of the drum at the fixed end of the drum cracks, causing serious accidents.

[0005] On the other hand, the mechanical characteristics of the single-sided support and cantilever structure limit the increase in the drum diameter, rotation speed, filtration zone length, and drum stage number, which in turn leads to a series of disadvantages of the piston push centrifuge, such as easy vibration, small separation factor, short material filtration time, high material moisture content, high energy consumption per unit product drying, excessively large wash water equivalent, difficulty in post-use wash water treatment, increased environmental protection costs, few drum stages, small production capacity, and inability to scale up. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a piston pusher centrifuge drum assembly supported at two or more points to overcome the disadvantages of conventional piston pusher centrifuges, such as small drum diameter, slow rotation speed, short filtration zone length, few drum stages, easy vibration, small separation factor resulting in short material filtration time, high material moisture content, high energy consumption per unit product drying, excessively large wash water equivalent, difficulty in handling used wash water resulting in increased environmental protection costs, few drum stages, small production capacity, and inability to scale up.

[0007] The technical solution adopted by the present invention is: a two-point or multi-point supported piston pusher centrifuge drum assembly, comprising a main shaft, a push rod, a drum with an open end and a side wall opening, a pusher, a distributor, a drum support structure, and a shaft sleeve;

[0008] The main shaft and the push rod are driven to rotate by an external driving mechanism installed at the shaft end; the push rod is driven by the external driving mechanism to make axial reciprocating motion; the main shaft is a hollow tubular structure, and the push rod is arranged inside the main shaft; the drum wall of the drum has a hole as a filtrate channel; the pusher is fixedly arranged at the left end of the main shaft or the push rod; the distributor is arranged on the right side of the pusher, and the gap between the two serves as a material channel; the sleeve is fixedly sleeved on the outside of the main shaft or the push rod;

[0009] The drum bottom of the drum is fixedly arranged on the main shaft or the push rod, the drum support structure is arranged in the circumferential direction of the shaft sleeve, one end of the drum support structure is fixed on the shaft sleeve, and the other end is fixed on the drum wall of the drum; the push rod is a hollow tubular structure, the left end of the push rod is the feed inlet, and the right end of the push rod is the wash water inlet;

[0010] A material channel connected to the internal pipeline of the push rod is provided on the main shaft and / or push rod between the pusher and the distributor, and the material enters the gap between the pusher and the distributor through the material channel and then enters the interior of the drum; a wash water channel connected to the interior of the push rod is provided in the middle of the main shaft, push rod and sleeve, and wash water enters the interior of the drum through the wash water channel, and a partition plate for separating the material channel and the wash water channel is provided in the push rod.

[0011] Furthermore, the drum support structure is composed of one or more of plates, columns, tubes, hollow shafts, fasteners, etc., which are evenly distributed along the circumference of the drum.

[0012] Furthermore, the number of the drum support structures distributed axially in the drum can be one row, located between the axial feed end and the discharge end of the drum wall, with an axial length equal to or less than the length of the filtration zone of the drum wall, to form a continuous support structure; can be two rows, located respectively at the axial feed end and the discharge end of the drum wall, to form a simply supported beam support structure with double support points; can be more than two rows, located respectively between the axial feed end and the discharge end of the drum wall, to form a multi-support structure.

[0013] Furthermore, the drum is a single-stage drum or a double-stage drum or a multi-stage drum; the drums, the drums and the pusher, the drums and the feed distributor, the pusher and the feed distributor, the drums and the main shaft, and the drums and the push rods are connected through a connecting structure to transmit power for rotation or rotation and reciprocating motion.

[0014] Furthermore, the connection structure is a combination of one or more of a plate, a column, a tube and fasteners, or a combination of multiple types of plates, columns, tubes and fasteners.

[0015] Furthermore, the material channel or the wash water channel is in the form of a hole or an annular seam. When the channel is a hole, both ends of the channel are continuous; when the channel is an annular seam, both ends of the channel are disconnected, and both ends of the annular seam are connected by a connecting structure.

[0016] The beneficial effects and characteristics of the present invention are: feeding through the middle of a push rod and adopting a two-point or multi-point support structure, so that the diameter of the drum is large, the rotation speed is fast, the filter area length is long, and the number of drum stages is large; it has the advantages of not easy to vibrate, large separation factor, increased filter area length, extended material filtration time, low filter residue moisture content, small wash water equivalent, large production capacity, large-scale, energy saving, consumption reduction, emission reduction, and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention (the pusher reciprocates, and the drum does not reciprocate);

[0018] Figure 2 It is a schematic diagram of the overall structure of another preferred embodiment of the present invention (the first layer of the inner drum reciprocates, and the pusher does not reciprocate);

[0019] Figure 3 It is a schematic diagram of the overall structure of another preferred embodiment of the present invention (the inner second layer drum and the pusher reciprocate, and the other layers of drums do not reciprocate);

[0020] Figure 4 It is a schematic diagram of the overall structure of another preferred embodiment of the present invention (the pusher reciprocates, and the drum does not reciprocate);

[0021] Figure 5 It is a schematic diagram of the overall structure of another preferred embodiment of the present invention (the pusher does not reciprocate, and the first layer of the inner drum reciprocates);

[0022] Figure 6 It is a schematic diagram of the overall structure of another preferred embodiment of the present invention (the pusher reciprocates, the second layer drum reciprocates, and the other layers of drums do not reciprocate);

[0023] Figure 7 yes Figure 1 A schematic diagram of the cross-sectional structure at the middle;

[0024] Figure 8 1 is a schematic diagram of the three-dimensional structure of a rotary drum device according to a preferred embodiment of the present invention (in order to facilitate the expression of the internal structure, the side of the rotary drum is partially uncovered);

[0025] Fig. 9 1 is a schematic diagram of the three-dimensional structure of a rotary drum device according to another preferred embodiment of the present invention (in order to facilitate the expression of the internal structure, the side of the rotary drum is partially uncovered);

[0026] Fig.10 It is a schematic diagram of the three-dimensional structure of the axial discharge end of the drum of the drum device of the preferred embodiment of the present invention (the number of drum support structures 6 distributed along the axial direction in the drum is one row).

[0027] Note: The arrows in the figure represent the movement trajectory of materials or washing water.

[0028] The reference numerals in the figure indicate: 1-main shaft, 2-push rod, 21-feed inlet, 22-wash water inlet, 23-material channel, 24-wash water channel, 25-partition plate, 3-drum, 31-drum bottom, 32-drum wall, 4-pusher, 5-distributor, 6-drum supporting structure, 7-sleeve, 8-drum axial discharge end, 9-connecting structure. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Embodiment 1:

[0031] Please refer to Figure 1 , a two-point or multi-point supported piston pusher centrifuge drum assembly, comprising a main shaft 1, a push rod 2, a drum 3 with an open end and a side wall opening, a pusher 4, a distributor 5, a drum support structure 6, and a shaft sleeve 7;

[0032] The main shaft 1 and the push rod 2 are driven to rotate by an external driving mechanism (the external driving mechanism is conventional equipment, so it is not shown in the figure); the push rod 2 is driven by the external driving mechanism to make axial reciprocating motion; the main shaft 1 is a hollow tubular structure, and the push rod 2 is arranged inside the main shaft 1; the drum wall 32 of the drum 3 is opened with a hole as a filtrate channel; the pusher 4 is fixedly arranged at the left end of the main shaft 1 or the push rod 2; the distributor 5 is arranged on the right side of the pusher 4, and the gap between the two is used as a material channel; the shaft sleeve 7 is fixedly sleeved on the outside of the main shaft 1 or the push rod 2;

[0033] The drum bottom 31 of the drum 3 is fixedly arranged on the main shaft 1 or the push rod 2, and the drum support structure 6 is arranged in the circumferential direction of the shaft sleeve 7, one end of the drum support structure 6 is fixed on the shaft sleeve 7, and the other end is fixed on the drum wall 32 of the drum 3; the push rod 2 is a hollow tubular structure, the left end of the push rod 2 is the feed inlet 21, and the right end of the push rod 2 is the wash water inlet 22;

[0034] A material channel 23 (structural form is a through hole) connected to the internal pipeline of the push rod is provided on the main shaft 1 and or the push rod 2 between the pusher 4 and the distributor 5, and the material enters the gap between the pusher 4 and the distributor 5 through the material channel and then enters the inside of the drum; a wash water channel 24 (structural form is a through hole) connected to the inside of the push rod is provided in the middle of the main shaft 1, the push rod 2 and the sleeve 7, and the wash water enters the inside of the drum through the wash water channel, and a partition plate 25 for separating the material channel 21 and the wash water channel 22 is provided in the push rod.

[0035] Specifically, the drum support structure 6 is composed of one or more of plates, columns, tubes, hollow shafts, and fasteners uniformly distributed along the circumference of the drum. Considering the convenience of processing, the reinforcement structure 7 and the distributor 5 are connected as one. The number of the drum support structures 6 distributed along the axial direction in the drum can be one row, located between the axial feed end and the discharge end of the drum wall 32, and the axial length is equal to or less than the length of the drum wall filtration area, forming a continuous support structure (see Figure 1 , Figure 4 );

[0036] Embodiment 2:

[0037] The difference from Example 1 is that the number of the drum support structures 6 distributed in the axial direction inside the drum can be two rows (see Figure 2 , Figure 5 ), respectively located at the axial feeding end and the discharging end of the drum wall 32, forming a double-supported simply supported beam support structure; there may be more than two rows (see Figure 3 , Figure 6 ), which are respectively located between the axial feeding end and the discharging end of the drum wall 32, forming a multi-point support structure.

[0038] Embodiment 3:

[0039] The difference from the first embodiment is that the material channel 23 or the wash water channel 24 is a ring seam on the push rod 2 or other structural forms, and the two ends of the ring seam are connected by a connecting structure 9. At this time, the torque of the driving mechanism is transmitted through the connecting structure 9 (see Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Fig. 9The connecting structure 9 may be a combination of one or more plates, columns, or tubes and fasteners (such as screws or bolts), or a combination of multiple plates, columns, or tubes and fasteners (such as a coupling-like structure).

[0040] Embodiment 4:

[0041] The difference from Example 1 is that, please refer to Figure 2 to Figure 6 The drum 3 is a single-stage drum, a double-stage drum or a multi-stage drum; the drums, the drums and the pusher, the drums and the feed distributor, the pusher and the feed distributor, the drums and the main shaft, and the drums and the push rods are connected through a connecting structure 9 to transmit power for rotation or rotation and reciprocating motion.

[0042] Considering the convenience of processing, Figure 2-Figure 6 The middle distributor 5 and the reinforcement structure 7 can be designed as an integrated structure (or a non-integrated connection structure).

[0043] In order to show the structure more clearly, Figure 8 , Fig. 9 , Fig.10 The three-dimensional structure diagram of the drum is shown (only Figure 1 , Figure 4 Take the middle drum structure as an example. Figure 8 correspond Figure 1 Rotating drum, Fig. 9 correspond Figure 4 rotating drum).

[0044] Specific operating principle: the material enters from the feed port 21 of the push rod 2, and the washing water enters from the washing water port of the push rod 2. A material channel 23 and a washing water channel 24 are opened in the push rod 2 area where the drum 3 is located; the material enters the inside of the drum from the material channel 23, and the washing water enters the inside of the drum from the washing water channel 24. The washing water enters the inside of the drum 3 from the washing water channel 24. The drum 3 rotates under the action of the driving mechanism 6. The material is dried under the action of the centrifugal force, and the filtrate is precipitated from the opening of the drum wall 32. The filter residue is left on the side wall of the drum wall 32 to form a barrel-shaped filter cake 10, and is pushed out of the open end of the drum 3 section by section by the pusher 4 or the drum 3 (the displacement of the left and right reciprocating motion (limited to not closing the material channel or the washing water channel) that reciprocates left and right.

[0045] The present invention changes the cantilever beam support structure supported by a single fulcrum at the axial feed end of the drum wall into a simply supported beam support structure supported by two fulcrums at the axial feed end and the discharge end of the drum wall, or changes it into a multi-fulcrum support structure between the axial feed end and the discharge end of the drum wall, or changes it into a plate support structure with a length approximately equal to the length of the filter zone of the drum wall; the strength of the drum wall is greatly enhanced, so that the drum has a large diameter, a fast rotation speed, a long filter zone length, a large number of drum stages, is not easy to vibrate, has a large separation factor, increases the length of the filter zone, prolongs the material filtration time, has a low moisture content of the filter residue, has a small wash water equivalent, has a large production capacity, and is large-scale.

[0046] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the structural relationship and principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A two-point or multi-point supported piston pusher centrifuge drum assembly, comprising a main shaft (1), a push rod (2), a drum (3) with an open end and a hole in the side wall, a pusher (4), a distributor (5), a drum support structure (6), and a shaft sleeve (7); characterized in that: The main shaft (1) and the push rod (2) are driven to rotate by an external driving mechanism installed at the shaft end; the push rod (2) is driven by the external driving mechanism to perform axial reciprocating motion; the main shaft (1) is a hollow tubular structure, and the push rod (2) is arranged inside the main shaft (1); a hole is opened on the drum wall (32) of the drum (3) as a filtrate channel; The pusher (4) is fixedly arranged on the left end of the main shaft (1) or the push rod (2); the distributor (5) is arranged on the right side of the pusher (4), and the gap between the two serves as a passage for the material; the sleeve (7) is fixedly sleeved on the outside of the main shaft (1) or the push rod (2); The drum bottom (31) of the drum (3) is fixedly arranged on the main shaft (1) or the push rod (2); the drum support structure (6) is arranged in the circumferential direction of the shaft sleeve (7); one end of the drum support structure (6) is fixed on the shaft sleeve (7), and the other end is fixed on the drum wall (32) of the drum (3); the push rod (2) is a hollow tubular structure; the left end of the push rod (2) is a feed inlet (21), and the right end of the push rod (2) is a wash water inlet (22); A material channel (23) connected to the internal pipeline of the push rod is provided on the main shaft (1) and / or the push rod (2) between the pusher (4) and the distributor (5), and the material enters the gap between the pusher (4) and the distributor (5) through the material channel (23) and then enters the interior of the drum; a wash water channel (24) connected to the interior of the push rod is provided in the middle of the main shaft (1), the push rod (2) and the shaft sleeve (7), and wash water enters the interior of the drum through the wash water channel, and a partition plate (25) for separating the material channel (23) and the wash water channel (24) is provided in the push rod; The drum support structure (6) is composed of one or more of plates, columns, tubes, hollow shafts, fasteners, etc., which are evenly distributed along the circumference of the drum. The number of the drum support structures (6) distributed along the axial direction inside the drum is one row, located between the axial feed end and the discharge end of the drum wall (32), with an axial length equal to or less than the length of the filtration zone of the drum wall, forming a continuous support structure; or two rows, located respectively at the axial feed end and the discharge end of the drum wall (32), forming a simply supported beam support structure with double support points; or more than two rows, located respectively between the axial feed end and the discharge end of the drum wall (32), forming a multi-support support structure.

2. The two-point or multi-point supported piston pusher centrifuge drum assembly according to claim 1, characterized in that: The drum (3) is a single-stage drum, a double-stage drum, or a multi-stage drum; the drums, the drums and the pusher, the drums and the feed distributor, the pusher and the feed distributor, the drums and the main shaft, and the drums and the push rods are connected by a connecting structure (9) to transmit power for rotation or rotation and reciprocating motion.

3. The two-point or multi-point supported piston pusher centrifuge drum assembly according to claim 2, characterized in that: The connection structure (9) is a combination of one or more of a plate, a column, a tube and fasteners, or a combination of multiple types of plates, columns, tubes and fasteners.

4. The two-point or multi-point supported piston pusher centrifuge drum assembly according to claim 3, characterized in that: The material channel (23) or the wash water channel (24) is in the form of a hole or an annular slit. When the channel is a hole, both ends of the channel are continuous; when the channel is an annular slit, both ends of the channel are disconnected, and both ends of the annular slit are connected by a connecting structure (9).

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