Double-pushing and double-discharging type material pushing centrifugal machine with pre-thickening structure

Abstract

The invention discloses a double-pushing and double-discharging type material pushing centrifugal machine with a pre-thickening structure, and relates to the technical field of material pushing centrifugal machines, the double-pushing and double-discharging type material pushing centrifugal machine has the advantage that the requirement for the solid-to-liquid ratio of slurry entering the centrifugal machine is lowered, and the technical scheme is characterized in that the double-pushing and double-discharging type material pushing centrifugal machine comprises a pre-thickening assembly arranged in a screen barrel and a feeding pipe arranged on a product chamber; the feeding pipe conveys slurry into the pre-thickening assembly, after the slurry is thickened by the pre-thickening assembly, bidirectional material distribution is carried out, the driving part pushes the pre-thickening assembly to move in the screen barrel in a reciprocating mode, and solid-phase discharging pipes are arranged at the positions, below one side of the opening of the rotary drum and below the discharging hole, of the product chamber.

Description

Technical Field

[0001] The invention relates to the technical field of pusher centrifuges, in particular to a double-push and double-outlet pusher centrifuge with a pre-thickening structure. Background Art

[0002] As a continuously operating filtering centrifuge, pusher centrifuge is widely used in the field of solid-liquid separation.

[0003] At present, the existing pusher centrifuges on the market require that the solid-liquid ratio of the slurry entering the centrifuge is high, and the effect is better if it is greater than 40%. If the solid-liquid ratio is low, the machine is prone to uneven distribution and vibration. Therefore, a high solid-liquid ratio of the slurry entering the centrifuge is required.

[0004] Therefore, the applicant has developed a new technical solution in the actual production process to solve the above technical problems. Summary of the invention

[0005] In view of the above-mentioned technical deficiencies, the object of the present invention is to provide a double-push double-outlet pusher centrifuge with a pre-thickening structure, which has the advantage of reducing the requirement for the solid-liquid ratio of the slurry entering the centrifuge.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: The present invention provides a double-push double-outlet pusher centrifuge with a pre-thickening structure, comprising a product chamber, a drum rotatably connected to the product chamber through a driving member, and a screen cylinder located on the inner wall of the drum, one side of the drum is provided with an opening, and the openings are horizontally distributed with a gap between the vertical wall of the product chamber, and the drum is provided with a plurality of discharge holes on a side away from the drum opening, and each of the discharge holes is located on one side of the screen cylinder; It also includes a pre-thickening component arranged in the screen cylinder and a feed pipe arranged on the product chamber. The feed pipe transports slurry into the pre-thickening component. After the pre-thickening component thickens the slurry, it performs bidirectional material distribution. The driving member drives the pre-thickening component to reciprocate in the screen cylinder. The product chamber is provided with a solid phase discharge pipe below one side of the drum opening and below the discharge hole.

[0007] By adopting the above technical scheme, after the slurry enters the pre-thickening component from the feed pipe, it is pre-dehydrated by the pre-thickening component to reduce the moisture in the slurry, and then the pre-thickening component is discharged in two directions, and then the solid-liquid separation is performed through the screen cylinder, thereby improving the efficiency of solid-liquid separation of the slurry. With the pre-thickening component, the solid-liquid ratio requirement of the slurry can be reduced, such as 25%, 15%, etc. After pre-thickening, a part of the water is filtered out, which is equivalent to increasing the concentration of the slurry, reducing the solid-liquid ratio requirement of the slurry entering the centrifuge, and can also save the pre-thickening equipment in the previous process. Without the pre-thickening component, the pre-thickening equipment must be added in front of the centrifuge, which increases the cost and energy consumption, and some slurries cannot be concentrated by the pre-thickening equipment. The pre-thickening component of the centrifuge can solve this problem.

[0008] Preferably, the product chamber is provided with a mounting opening on a side wall facing the drum opening, and a door plate is installed on the outer wall of the product chamber by bolts, and the door plate closes the mounting opening, and the feed pipe is horizontally passed through and fixed on the door plate, and the feed pipe conveys slurry to the pre-thickening component, and the pre-thickening component is slidably connected to the outer wall of the feed pipe.

[0009] Preferably, it also includes an oil tank for hydraulic oil, the oil tank also serves as a centrifuge base, a bearing seat is mounted on the oil tank, and the driving member is arranged on the bearing seat; The driving member includes a hollow shaft that performs rotational motion and a push rod shaft that passes through the hollow shaft and performs horizontal linear motion and rotational motion. The hollow shaft is rotatably connected in a bearing seat, and one end of the hollow shaft and the push rod shaft both extend out of the bearing seat into the product chamber. The drum is arranged at the end of the hollow shaft that enters the product chamber, one end of the push rod shaft is provided with a bottom plate located in the drum, one end of the push rod shaft passes through the drum, a plurality of pillars are arranged on the bottom plate, and a push plate is provided at one end of each pillar away from the bottom plate, and the pre-thickening component is arranged on the push plate.

[0010] Preferably, the pre-thickening component includes a baffle plate slidably connected to the feed pipe, the baffle plate is provided with a conical main distributor cover covering the outside of the feed pipe, the end of the main distributor cover with a larger taper extends out of the feed pipe and the end of the main distributor cover with a larger taper is coaxially provided with an annular resistance plate, the resistance plate and the push plate are connected by a plurality of connecting rods, each of the connecting rods is distributed along the periphery of the resistance plate, the outer wall of the resistance plate contacts the inner wall of the screen cylinder, there is a gap between the outer wall of the push plate and the screen cylinder, the end of the feed pipe located in the main distributor cover is closed and the outer wall is circumferentially provided with a plurality of discharge holes, the discharge pipe is provided with a coaxially distributed conical distribution plate at the closed end, and the end of the conical distribution plate with a larger taper extends through the discharge hole; The inner wall of the main distributor cover is provided with an annular mounting ring 1 and mounting ring 2, the mounting ring 1 and mounting ring 2 are connected by a conical screen, and the mounting ring 2 is distributed away from the baffle plate; The second mounting ring is provided with a water distribution cylinder with the same taper as the conical screen, and the water distribution cylinder is provided with a plurality of water outlet holes in the circumferential direction, and the main distributor cover is provided with main liquid outlet holes corresponding to the various water outlet holes; An annular guide plate is coaxially fixed to one end of the water dividing cylinder away from the second mounting ring, the inner wall and outer wall of the guide plate are respectively located on the inner and outer sides of the water dividing cylinder, the second mounting ring is provided with a drainage hole located between two adjacent water outlet holes, the guide plate is provided with drainage holes distributed corresponding to each drainage hole, each of the drainage holes is located on one side of the outer wall of the water dividing cylinder, and the outer wall of the water dividing cylinder is provided with a partition plate 1 extending to the inner wall of the main distributor cover on both sides of each water outlet hole, and the two sides of the partition plate 1 are respectively fixedly connected to the guide plate and the second mounting ring.

[0011] Preferably, a plurality of reinforcing plates abutting against the conical screen are provided between the mounting ring 1 and the mounting ring 2, and the reinforcing plates are located on the side of the conical screen facing the main distributor cover. When the reinforcing plates are distributed opposite to the drainage holes, the reinforcing plates are located at one end of the mounting ring 2, and at this time there is a gap between the reinforcing plates and the mounting ring 2.

[0012] Preferably, the drainage plate is provided with a plurality of secondary liquid outlet holes on the plate surface facing the inner wall of the water separation cylinder, each of the secondary liquid outlet holes is located between two adjacent water outlet holes, one end of the water separation cylinder penetrates into the contact plate and there is a gap between the end and the annular inner hole of the contact plate, at this time, after the drainage plate is installed on the water separation cylinder, it is located on the side of the contact plate away from the conical screen and is fixedly connected to the contact plate by bolts, and each of the drainage holes is located in the inner hole of the contact plate; The drainage plate is coaxially provided with an annular sealing plate fixedly connected to the pushing plate on the side away from the water distribution cylinder, and the sealing plate is located between the drainage hole and the secondary liquid outlet hole; The pushing plate is provided with an axial hole directly facing each secondary liquid outlet hole, and the inner wall of the water dividing cylinder is provided with a partition plate 2 located on two opposite sides of the water outlet hole, and one side of the partition plate 2 is fixedly connected to the drainage plate.

[0013] Preferably, a dividing ring extending to the push plate is coaxially provided on the inner wall of the guide plate, and the dividing ring is circumferentially provided with dividing holes corresponding to each axial hole, and the outer diameter of the dividing ring is smaller than the circular diameter of each axial hole distribution.

[0014] Preferably, the pushing plate is fixedly connected to an annular auxiliary distributor seat through a plurality of connecting rods on the side away from the contact plate, and the auxiliary distributor seat includes an auxiliary distributor cylinder coaxially distributed with the pushing plate and a contact ring coaxially arranged on the side of the auxiliary distributor cylinder away from the pushing plate, the contact ring is opposite to the pushing plate and the outer wall is in contact with the inner wall of the screen cylinder, the connecting rod is fixed on the contact ring wall, and each of the axial holes is located in the conical auxiliary distributor cylinder.

[0015] Preferably, the push plate is provided with a plurality of connecting rods three extending from the auxiliary distributor seat, each of the connecting rods three is connected by an annular material stopper ring, there is a gap between the material stopper ring and the auxiliary distributor seat, and the outer wall of the material stopper ring extends to the inner wall of the resistance ring, the inner wall of the material stopper ring extends to each pillar, and a groove is provided for each pillar to be embedded.

[0016] Preferably, the product chamber is provided with an outer feed plate on the side of the screen cylinder away from the hollow shaft, and an inner feed plate is provided on the side of the screen cylinder close to the hollow shaft, and the two solid phase discharge pipes on the lower end wall of the product chamber are respectively connected with the outer feed plate and the inner feed plate; A washing pipe 1 is inserted into the feed pipe, one end of the washing pipe 1 passes through the push plate, and the other end is provided with a curved pipe that passes through the outer wall of the feed pipe, and a plurality of washing holes are opened on the outer wall of the push plate when the washing pipe 1 passes through the push plate; A washing pipe 2 is provided on the door plate, the washing pipe 2 is located above the feed pipe and one end of the washing pipe 2 passes through the door plate, and the other end extends toward the screen cylinder, and a plurality of nozzles for spraying toward the inner wall of the screen cylinder are provided on the washing pipe 2.

[0017] The beneficial effect of the present invention is that after the slurry enters the pre-thickening component from the feed pipe, it is pre-dehydrated by the pre-thickening component to reduce the water content in the slurry, and then the pre-thickening component is bidirectionally discharged, and then solid-liquid separation is performed through the screen cylinder, thereby improving the efficiency of solid-liquid separation of the slurry. With the pre-thickening component, the solid-liquid ratio requirement of the slurry can be reduced, such as 25%, 15%, etc. After pre-thickening, a part of the water is filtered out, which is equivalent to increasing the concentration of the slurry, reducing the solid-liquid ratio requirement of the slurry entering the centrifuge, and can also save the pre-thickening equipment of the previous process. If there is no pre-thickening component, the pre-thickening equipment must be added in front of the centrifuge, which increases the cost and energy consumption, and some slurries cannot be concentrated by the pre-thickening equipment. The pre-thickening component of the centrifuge can solve this problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of this embodiment; Figure 2 This is a schematic diagram of the structure of the conical screen in this embodiment; Figure 3 This is a schematic diagram of the slurry passage trajectory in this embodiment; Figure 4 This is a schematic diagram of the structure of the drum in this embodiment; Figure 5 This is a schematic diagram of the structure of the pre-thickening component of this embodiment; Figure 6 This is a schematic diagram of the structure of the retaining ring of this embodiment; Figure 7 This is a schematic diagram of the structure of the drain hole in this embodiment; Figure 8 It is a schematic diagram of the structure of the partition 2 of this embodiment.

[0020] Description of reference numerals: In the figure: 1, product chamber; 11, drum; 112, discharge hole; 12, screen cylinder; 13, feed pipe; 131, installation port; 132, door plate; 133, discharge hole; 134, conical distribution plate; 14, solid phase discharge pipe; 15, oil tank; 151, bearing seat; 152, hollow shaft; 153, push rod shaft; 154, bottom plate; 155, support; 156, push plate; 16, baffle plate; 161, main distributor cover; 162, contact plate; 163, connecting rod 1; 164, installation ring 1; 1641, reinforcement plate; 165, installation ring 2; 1651 , drainage hole; 166, conical screen; 167, water distribution cylinder; 1671, partition one; 168, water outlet hole; 169, main outlet hole; 17, drainage plate; 171, drainage hole; 172, secondary outlet hole; 173, sealing plate; 174, axial hole; 175, partition two; 176, distribution ring; 177, distribution hole; 18, connecting rod two; 181, auxiliary distribution cylinder; 182, resistance ring; 19, connecting rod three; 191, blocking ring; 2, outer discharge plate; 21, inner discharge plate; 22, washing pipe one; 221, elbow; 222, washing hole; 23, washing pipe two. DETAILED DESCRIPTION

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] A double-pushing and double-discharging type pusher centrifuge with a pre-thickening structure, as Figure 1 and Figure 2 and Figure 4 , includes a product chamber 1, a drum 11 rotatably connected in the product chamber 1 through a driving member, and a screen cylinder 12 located on the inner wall of the drum 11. The longitudinal section of the drum 11 is in a U-shape. One side of the drum 11 is provided with an opening, and there is a gap one between the horizontally distributed opening and the vertical wall of the product chamber 1. A plurality of blanking holes 112 are circumferentially provided on the side of the drum 11 away from the opening of the drum 11, and each blanking hole 112 is located on one side of the screen cylinder 12; the setting of the gap one and the blanking holes 112 facilitates the bidirectional discharge of the solid phase material in the drum 11; drain holes are evenly provided on the drum 11 along the circumferential direction to facilitate the discharge of water in the drum 11; the product chamber 1 is the space for solid-liquid separation of the centrifuge.

[0023] As Figure 1 and Figure 2 , it further includes a pre-thickening assembly arranged in the screen cylinder 12 and a feed pipe 13 arranged on the product chamber 1. The feed pipe 13 conveys the slurry into the pre-thickening assembly. After the pre-thickening assembly thickens the slurry, it performs two-way feeding. The driving member pushes the pre-thickening assembly to reciprocate in the screen cylinder 12 to facilitate pushing the filtered solid into the gap one or the blanking holes 112. Solid phase discharge pipes 14 are provided below the opening side of the drum 11 and below the blanking holes 112 in the product chamber 1.

[0024] As Figure 1 and Figure 2 , after the slurry enters the pre-thickening assembly from the feed pipe 13, it is pre-dehydrated by the pre-thickening assembly to reduce the moisture in the slurry. Subsequently, it is discharged in two directions by the pre-thickening assembly and then undergoes solid-liquid separation through the screen cylinder 12, thereby improving the efficiency of solid-liquid separation of the slurry. Moreover, with the pre-thickening assembly, the solid-liquid ratio requirement of the slurry can be reduced, such as 25%, 15%, etc. After pre-thickening, a part of the water is filtered out, which is equivalent to increasing the concentration of the slurry, reducing the solid-liquid ratio requirement of the slurry entering the centrifuge, and can also save the pre-thickening equipment in the previous process. Without the pre-thickening assembly, it is necessary to add pre-thickening equipment in front of the centrifuge, increasing costs and energy consumption, and there are still some slurries that cannot be thickened by the pre-thickening equipment. This pre-thickening assembly of the centrifuge can solve this problem.

[0025] As Figure 1 and Figure 2 A mounting opening 131 is provided on a side wall of the product chamber 1 which opens toward the drum 11. A door plate 132 is installed on the outer wall of the product chamber 1 by bolts. The door plate 132 closes the mounting opening 131. A feed pipe 13 is horizontally passed through and fixed on the door plate 132. The feed pipe 13 conveys slurry to the pre-thickening component, and the pre-thickening component is slidably connected to the outer wall of the feed pipe 13, so that the pre-thickening component can push the material while distributing the material in both directions.

[0026] like Figure 1 and Figure 2 , and also includes an oil tank 15 for containing hydraulic oil, the oil tank 15 also has the function of a centrifuge base, a bearing seat 151 is installed on the oil tank 15, a driving member is arranged on the bearing seat 151, and a product chamber 1 is arranged at one end of the bearing seat 151; like Figure 1 and Figure 2 The driving member includes a hollow shaft 152 that performs rotational motion and a push rod shaft 153 that is inserted into the hollow shaft 152 and performs horizontal linear motion and rotational motion. The hollow shaft 152 is rotatably connected to the bearing seat 151, and one end of the hollow shaft 152 and the push rod shaft 153 both extend out of the bearing seat 151 and enter the product chamber 1; like Figure 1 and Figure 2 , specific connection structure: the front bearing and the rear bearing are installed in the bearing seat 151, which are fixed by the front bearing pressure cover and the rear bearing pressure cover respectively, and the hollow shaft 152 is installed into the front bearing and the rear bearing to facilitate the rotation of the hollow shaft 152; a front shaft sleeve and a rear shaft sleeve are arranged between the hollow shaft 152 and the push rod shaft 153, and the front shaft sleeve and the rear shaft sleeve are sleeved outside the push rod shaft 153 and are used to support the push rod shaft 153. The end of the hollow shaft 152 away from the drum 11 extends out of the bearing seat 151, and a cylinder pulley is fixedly installed at the extended end; the cylinder pulley is equipped with a cylinder cover; there is a composite piston inside the cylinder pulley, which is connected to the push rod shaft 153. Under the action of hydraulic oil, the composite piston automatically switches the direction of the oil circuit and reciprocates under the action of hydraulic oil, thereby driving the push rod shaft 153 to reciprocate horizontally; the inner wall of the hollow shaft 152 is provided with a guide key, and the outer wall of the push rod shaft 153 is provided with a guide groove for the guide key to slide along the length direction of the push rod shaft 153. However, it is not limited to the above connection structure, as long as the structure can realize the self-rotation of the hollow shaft 152 and the horizontal linear motion and rotational motion of the push rod shaft 153.

[0027] like Figure 1 and Figure 2 The cylinder pulley drives the hollow shaft 152 to perform a rotary motion in the bearing seat 151. The push rod shaft 153 follows the hollow shaft 152 to perform a rotary motion through the guide key, and the push rod shaft 153 follows the composite piston to perform a reciprocating motion.

[0028] like Figure 1 and Figure 2 The driving part also includes the following structure: the drum 11 is arranged at one end of the hollow shaft 152 entering the product chamber 1, one end of the push rod shaft 153 is provided with a bottom plate 154 located in the drum 11, one end of the push rod shaft 153 passes through the drum 11, and there are several pillars 155 on the bottom plate 154, and each pillar 155 is provided with a pushing plate 156 at one end away from the bottom plate 154, and the pre-thickening component is arranged on the pushing plate 156.

[0029] like Figure 1 and Figure 2 and Figure 3 The pre-thickening component includes a baffle plate 16 slidably connected to the feed pipe 13, the baffle plate 16 is a circular plate, a conical main distributor cover 161 covering the outside of the feed pipe 13 is provided on the baffle plate 16, the end of the main distributor cover 161 with a smaller taper is fixed to the outer wall of the circular plate, the end of the main distributor cover 161 with a larger taper extends out of the feed pipe 13 and the end of the main distributor cover 161 with a larger taper is coaxially provided with an annular resistance plate 162, the resistance plate 162 is distributed parallel to the push plate 156 and there is a gap between the resistance plate 162 and the push plate 156, and the resistance plate 162 is connected to the push plate 156 through a plurality of connecting rods 163, Each connecting rod 163 is distributed along the periphery of the abutment plate 162, the outer wall of the abutment plate 162 contacts the inner wall of the screen cylinder 12, there is a gap between the outer wall of the push plate 156 and the screen cylinder 12, the gap is convenient for the discharge of the pre-filtered liquid, the end of the feed pipe 13 located in the main distributor cover 161 is closed and a plurality of discharge holes 133 are opened in the circumferential direction of the outer wall, the discharge pipe is provided with a coaxially distributed conical distribution plate 134 at the closed end, the end of the conical distribution plate 134 with a larger taper extends through the discharge hole 133, the purpose of the conical distribution plate 134 is to guide the slurry discharged from the discharge hole 133 to the inner wall of the main distributor cover 161; like Figure 2 and Figure 3 The inner wall of the main distributor cover 161 is provided with an annular mounting ring 164 and a mounting ring 2 165, and the mounting ring 164 and the mounting ring 2 165 are connected by a conical screen 166, and the conical screen 166 is fixed to the end of the mounting ring 164 and the mounting ring 2 165 away from the inner wall of the main distributor cover 161, so that there is a gap between the conical screen 166 and the inner wall of the main distributor cover 161, which is convenient for the flow of pre-filtered liquid, and the mounting ring 2 165 is distributed away from the baffle plate 16; at this time, the conical screen 166 pre-filters and thickens the slurry, and the filtered liquid flows along the conical main distributor cover 161 to the side with a larger taper.

[0030] like Figure 5 and Figure 6 and Figure 7 and Figure 8The second mounting ring 165 is provided with a water distribution cylinder 167 with the same taper as the conical screen 166. A plurality of water outlet holes 168 are provided on the circumferential direction of the water distribution cylinder 167. The main distributor cover 161 is provided with main liquid outlet holes 169 corresponding to the water outlet holes 168. At this time, the purpose of the conical distribution plate 134 is to guide the slurry discharged from the outlet hole 133 to the inner wall of the main distributor cover 161, and then the slurry flows along the conical screen 166 on the inner wall of the main distributor cover 161. It is pre-filtered and then flows to the water dividing cylinder 167. The water outlet 168 on the water dividing cylinder 167 discharges the pre-filtered slurry, and then it is discharged from the main distributor cover 161 through the main liquid outlet 169, and flows toward the screen cylinder 12, and then secondary filtration is performed to realize the distribution of the outer side of the push plate 156. The outer side, that is, the side of the push plate 156 facing the warehouse door plate 132, and the inner wall of the water dividing cylinder 167 and the inner wall of the conical screen 166 are located on the same cone surface.

[0031] like Figure 5 and Figure 6 and Figure 7 and Figure 8 The end of the water dividing cylinder 167 away from the second mounting ring 165 is coaxially fixed with an annular guide plate 17. The inner wall and the outer wall of the guide plate 17 are respectively located on the inner and outer sides of the water dividing cylinder 167. The second mounting ring 165 is provided with a drainage hole 1651 located between two adjacent water outlet holes 168. The guide plate 17 is provided with drainage holes 171 distributed corresponding to each drainage hole 1651. Each drainage hole 171 is located on one side of the outer wall of the water dividing cylinder 167, and is divided into The outer wall of the water cylinder 167 is provided with a partition 1671 extending to the inner wall of the main distributor cover 161 on both sides of each water outlet hole 168, and the two sides of the partition 1671 are respectively fixedly connected to the guide plate 17 and the mounting ring 165. At this time, the two adjacent partitions 1671 seal the water in the water outlet hole 168 in the two adjacent partitions 1671, so that the water in each water outlet hole 168 can flow out of the main liquid outlet 169 on the main distributor cover 161.

[0032] like Figure 5 and Figure 6 and Figure 7 and Figure 8 A plurality of reinforcing plates 1641 are provided between the mounting ring 164 and the mounting ring 2 165, and the reinforcing plates 1641 are located on the side of the conical screen 166 facing the main distributor cover 161. When the reinforcing plates 1641 are directly opposite to the drainage holes 1651, the reinforcing plates 1641 are located at one end of the mounting ring 2 165. At this time, there is a gap between the reinforcing plates 1641 and the mounting ring 2 165, so that the filtered liquid flows out of the conical screen 166, flows through the drainage holes 1651 on the mounting ring 2 165 to the outer wall of the water diversion cylinder 167, and then is discharged to the side of the abutment plate 162 away from the main distributor cover 161 through the drainage holes 171, so as to flow out through the screen cylinder 12.

[0033] like Figure 5 and Figure 6 and Figure 7 and Figure 8 , the surface of the drainage plate 17 is vertically distributed, and the drainage plate 17 is provided with a plurality of secondary liquid outlet holes 172 on the surface of the drainage plate 17 facing the inner wall of the water dividing cylinder 167, and each secondary liquid outlet hole 172 is located between two adjacent water outlet holes 168, and one end of the water dividing cylinder 167 penetrates into the contact plate 162 and there is a gap between the end and the inner hole of the annular contact plate 162. At this time, the drainage plate 17 is installed on the water dividing cylinder 167 and is located on the side of the contact plate 162 away from the conical screen 166 and is fixedly connected to the contact plate 162 by bolts, and each drainage hole 171 is located in the inner hole of the contact plate 162; like Figure 2 and Figure 6 and Figure 7 and Figure 8 The drainage plate 17 is coaxially provided with an annular sealing plate 173 fixedly connected to the pushing plate 156 on the side away from the water separation cylinder 167. The sealing plate 173 is located between the drainage hole 171 and the secondary liquid outlet hole 172, and is used to separate the liquid filtered through the conical screen 166 and the pre-thickened slurry, so that the liquid filtered through the conical screen 166 is discharged from the drainage hole 171 to the outer wall of the sealing plate 173, and the pre-thickened slurry is discharged from the secondary liquid outlet hole 172 to the inside of the sealing plate 173; like Figure 2 and Figure 6 and Figure 7 and Figure 8 The push plate 156 is provided with an axial hole 174 that is directly opposite to each secondary liquid outlet hole 172. The axial hole 174 guides the slurry in the sealing plate 173 to the side of the push plate 156 away from the discharge pipe, thereby realizing the inner distribution of the push plate 156. The inner wall of the water dividing cylinder 167 is provided with a partition plate 175 located on the opposite sides of the water outlet hole 168. One side of the partition plate 175 is fixedly connected to the guide plate 17. The setting of the partition plate 175 facilitates the slurry on the conical screen 166 to pass to the water outlet hole 168. In addition, since each secondary liquid outlet hole 172 is located between two adjacent water outlet holes 168, the partition plate 175 also passes the slurry through the secondary liquid outlet hole 172, thereby realizing the uniform distribution of the slurry on the conical screen 166 to the water outlet hole 168 and the secondary liquid outlet hole 172, that is, the uniform distribution of the slurry on the conical screen 166 to the inner and outer sides of the push plate 156.

[0034] like Figure 2 and Figure 8A dividing ring 176 extending to the pushing plate 156 is coaxially provided on the inner wall of the guide plate 17, and the inner wall of the dividing ring 176 is flush with the inner wall of the guide plate 17. The circumferential outer wall of the dividing ring 176 is provided with dividing holes 177 corresponding to each axial hole 174. The outer diameter of the dividing ring 176 is smaller than the circular diameter of each axial hole 174. At this time, the dividing hole 177 will discharge the slurry accumulated on one side of the conical screen 166 into the axial hole 174 through the dividing hole 177 to reduce liquid accumulation. In addition, in order to ensure uniform distribution of material on both sides of the push plate 156, the hole size of the secondary liquid outlet hole 172 can be reduced so that the amount of slurry discharged from the secondary liquid outlet hole 172 is less than the amount of slurry discharged from the water outlet hole 168 on the water dividing cylinder 167, and the less amount is compensated by the slurry discharged from the dividing hole 177, so that the amount of slurry discharged from the dividing hole 177 and the secondary liquid outlet hole 172 is the same as the amount of slurry discharged from the water outlet hole 168 on the water dividing cylinder 167, thereby achieving the purpose of uniform distribution of material on both sides of the push plate 156.

[0035] like Figure 2 and Figure 6 The push plate 156 is fixedly connected to a ring-shaped auxiliary material distributor seat on the side away from the contact plate 162 through a plurality of connecting rods 18. The auxiliary material distributor seat includes an auxiliary material distributor cylinder 181 coaxially distributed with the push plate 156 and a contact ring 182 coaxially arranged on the side of the auxiliary material distributor cylinder 181 away from the push plate 156. At this time, the auxiliary material distributor cylinder 181 can be a conical cylinder or a straight cylinder, preferably a conical cylinder. The end of the auxiliary material distributor cylinder 181 with a larger taper is distributed away from the push plate 156, and the contact ring 182 is directly opposite to the push plate 156 and outside The wall contacts the inner wall of the screen cylinder 12. At this time, the outer wall of the contact ring 182 and the contact plate 162 are in contact with the inner wall of the screen cylinder 12, thereby forming a discharge space for the liquid phase filtered by the conical screen 166, and as the pushing plate 156 moves horizontally back and forth, the contact ring 182 and the contact plate 162 push the solid phase material on the screen cylinder 12 to discharge into the gap 1 and the discharge hole 112 respectively, realizing two-way discharge, and the connecting rod 2 18 is fixed on the wall of the contact ring 182, and each axial hole 174 is located in the conical auxiliary distribution cylinder 181. The conical auxiliary distribution cylinder 181 guides the slurry discharged from the axial hole 174, thereby facilitating the slurry to flow toward the screen cylinder 12.

[0036] like Figure 2 and Figure 6 The push plate 156 is provided with a plurality of connecting rods 19 extending from the auxiliary distributor seat, each connecting rod 19 is connected by an annular blocking ring 191, there is a gap between the blocking ring 191 and the auxiliary distributor seat, and the outer wall of the blocking ring 191 extends to the inner wall of the abutment ring 182, the inner wall of the blocking ring 191 extends to each pillar 155, and a groove is provided for each pillar 155 to be embedded. The setting of the blocking ring 191 further guides the slurry flowing out of the auxiliary distributor seat, so that the slurry flows to the screen cylinder 12 for solid-liquid separation.

[0037] Working principle of pre-thickening component: Slurry pre-thickening: After the slurry enters from the feed pipe 13, it passes through the discharge hole 133 on the feed pipe 13 and is guided by the conical distribution plate 134 to the side of the inner wall of the main distributor cover 161 with a smaller taper, so that the slurry is guided to the conical screen 166, and the slurry is pre-filtered by the conical screen 166 to discharge part of the liquid phase in the slurry, which is equivalent to increasing the concentration of the slurry and achieving the purpose of slurry pre-thickening; Discharge of pre-thickened liquid: After the liquid phase material in the slurry filtered by the conical screen 166 passes through the conical screen 166, it flows along the inner wall of the main distributor cover 161 toward the second mounting ring 165, flows to the outer wall of the water diversion cylinder 167 through the drainage hole 1651 on the second mounting ring 165, and then is discharged to the side of the contact plate 162 away from the main distributor cover 161 through the drainage hole 171, that is, enters the space formed by the contact plate 162, the contact ring 182, the sealing plate 173, the auxiliary distribution cylinder 181, and the screen cylinder 12, so as to facilitate the liquid phase material in the slurry filtered by the conical screen 166 to flow out through the screen cylinder 12, as shown in FIG. Figure 3 The C passage trajectory in ; Bidirectional distribution on both sides of the push plate 156: the slurry filtered by the conical screen 166 flows along the conical screen 166 to the water separation cylinder 167, and the water outlet 168 on the water separation cylinder 167 guides the pre-filtered slurry out of the main distributor cover 161 through the main liquid outlet 169, and flows toward the screen cylinder 12, and then performs secondary filtration, so as to realize the distribution outside the push plate 156, such as Figure 3 The A passage trajectory in: The secondary liquid outlet 172 discharges the remaining slurry in the water distribution cylinder 167 to the side of the push plate 156 away from the feed pipe 13 through the axial hole 174, and the distribution hole 177 discharges the slurry on one side of the accumulated conical screen 166 to the axial hole 174 through the distribution hole 177, and then discharges it to the side of the push plate 156 away from the feed pipe 13. Through the guidance of the auxiliary distributor seat, the slurry inside the push plate 156 flows toward the screen cylinder 12, so that the distribution inside the push plate 156 is realized. Figure 3 The B passage trajectory in .

[0038] like Figure 4 An outer discharge plate 2 is provided on the side of the screen cylinder 12 of the product chamber 1 away from the hollow shaft 152, and an inner discharge plate 21 is provided on the side of the screen cylinder 12 close to the hollow shaft 152. The two solid phase discharge pipes 14 on the lower end wall of the product chamber 1 are respectively connected to the outer discharge plate 2 and the inner discharge plate 21; the outer discharge plate 2 and the inner discharge plate 21 are used to guide the solid phase material to reduce material splashing.

[0039] like Figure 1 and Figure 4The drum 11 is provided with a groove connected to the drainage hole and larger than the drainage hole on one side with the screen cylinder 12. The purpose of the groove is to accelerate the discharge of the liquid phase. A plurality of annular baffles are provided on the inner wall of the product chamber 1. There is a gap between each baffle and the outer wall of the drum 11. The outer wall of the product chamber 1 is provided with a liquid phase outlet pipe connected to the space between adjacent baffles. The outer discharge plate 2 and the inner discharge plate 21 are respectively fixed on the side opposite to each other of the two farthest baffles. The outer discharge plate 2 and the inner discharge plate 21 include a semi-arc plate fixed on the baffle and baffles arranged at both ends below the semi-arc plate. The semi-arc plate of the inner discharge plate 21 is sleeved on the outer wall of the drum 11, and the bottoms of the two baffles extend to the solid phase discharge pipe 14, which is convenient for guiding the material.

[0040] like Figure 1 A washing pipe 22 is passed through the feed pipe 13, one end of the washing pipe 22 passes through the pushing plate 156, and the other end is provided with a bent pipe 221 that bends and passes through the outer wall of the feed pipe 13. The washing pipe 22 is provided with a plurality of washing holes 222 on the outer wall passing through the pushing plate 156; detergent is introduced through the bent pipe 221 and the washing pipe 22, and the detergent is sprayed out through each washing hole 222, thereby facilitating the cleaning of the screen cylinder 12 on the inner side of the pushing plate 156.

[0041] like Figure 1 The second washing pipe 23 is provided on the door plate 132. The second washing pipe 23 is located above the feed pipe 13 and one end of the second washing pipe 23 passes through the door plate 132, and the other end extends toward the screen cylinder 12. The second washing pipe 23 is provided with a plurality of nozzles spraying toward the inner wall of the screen cylinder 12. The second washing pipe 23 on the door plate 132 is used to wash the inner wall of the screen cylinder 12 located outside the push plate 156 in the drum 11.

[0042] Traditional pusher centrifuges are not suitable for low-concentration slurries. When the slurry concentration is too low, filter cakes cannot be formed. The centrifuge of the above technical solution can pre-thicken low-concentration slurries, making the pusher centrifuge suitable for materials with lower concentrations, thus expanding the application range of the pusher centrifuge.

[0043] The bidirectional pushing structure is adopted, and the pushing plate 156 pushes materials in two directions, which improves the uniformity of material distribution in the centrifuge. The pushing efficiency is increased to twice the original, and the output of the centrifuge is increased to about twice that of the traditional one-way pushing structure.

[0044] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A double-push and double-discharge pusher centrifuge with a pre-thickening structure, characterized in that: The invention comprises a product chamber (1), a drum (11) rotatably connected to the product chamber (1) via a driving member, and a screen cylinder (12) located on the inner wall of the drum (11); an opening is provided on one side of the drum (11), and the openings are horizontally distributed with a gap between the openings and the vertical wall of the product chamber (1); a plurality of material discharge holes (112) are provided on a side of the drum (11) away from the opening of the drum (11), and each of the material discharge holes (112) is located on one side of the screen cylinder (12); The invention also comprises a pre-thickening component arranged in the screen cylinder (12) and a feed pipe (13) arranged on the product chamber (1). The feed pipe (13) conveys slurry into the pre-thickening component. After the pre-thickening component thickens the slurry, it performs bidirectional material distribution. The driving member drives the pre-thickening component to move back and forth in the screen cylinder (12). The product chamber (1) is provided with a solid phase discharge pipe (14) below one side of the opening of the drum (11) and below the discharge hole (112).

2. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 1, characterized in that: The product chamber (1) is provided with a mounting opening (131) on a side wall opening toward the drum (11); a door plate (132) is mounted on the outer wall of the product chamber (1) by means of bolts; the door plate (132) closes the mounting opening (131); the feed pipe (13) is horizontally passed through and fixed on the door plate (132); the feed pipe (13) conveys slurry to the pre-thickening component, and the pre-thickening component is slidably connected to the outer wall of the feed pipe (13).

3. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 2, characterized in that: It also includes an oil tank (15) for storing hydraulic oil, the oil tank (15) also serving as a centrifuge base, a bearing seat (151) being mounted on the oil tank (15), and the driving member being arranged on the bearing seat (151); The driving member comprises a hollow shaft (152) that performs rotational motion and a push rod shaft (153) that passes through the hollow shaft (152) and performs horizontal linear motion and rotational motion. The hollow shaft (152) is rotatably connected to a bearing seat (151), and one end of the hollow shaft (152) and the push rod shaft (153) both extend out of the bearing seat (151) and enter the product chamber (1). The drum (11) is arranged at the end of the hollow shaft (152) that enters the product chamber (1). One end of the push rod shaft (153) is provided with a bottom plate (154) located in the drum (11). One end of the push rod shaft (153) passes through the drum (11). A plurality of pillars (155) are arranged on the bottom plate (154). A push plate (156) is arranged at one end of each pillar (155) away from the bottom plate (154). The pre-thickening component is arranged on the push plate (156).

4. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 3, characterized in that: The pre-thickening assembly comprises a baffle plate (16) slidably connected to a feed pipe (13), the baffle plate (16) being provided with a conical main distributor cover (161) covering the outside of the feed pipe (13), the main distributor cover (161) having a larger conicity at one end extending out of the feed pipe (13), and a ring-shaped abutment plate (162) being coaxially provided at the main distributor cover (161) having a larger conicity, the abutment plate (162) being connected to a push plate (156) via a plurality of connecting rods (163), each of the connecting rods (163) being connected to a push plate (156) and a push plate (156 ... 163) are distributed along the periphery of the abutment plate (162), the outer wall of the abutment plate (162) contacts the inner wall of the screen cylinder (12), a gap exists between the outer wall of the push plate (156) and the screen cylinder (12), one end of the feed pipe (13) located in the main distributor cover (161) is closed and a plurality of discharge holes (133) are opened in the circumferential direction of the outer wall, the discharge pipe is provided with a coaxially distributed conical distribution plate (134) at the closed end, and the end of the conical distribution plate (134) with a larger taper extends through the discharge hole (133); The inner wall of the main distributor cover (161) is provided with an annular mounting ring 1 (164) and a mounting ring 2 (165), the mounting ring 1 (164) and the mounting ring 2 (165) are connected via a conical screen (166), and the mounting ring 2 (165) is arranged away from the baffle plate (16); The second mounting ring (165) is provided with a water distribution cylinder (167) having the same taper as the conical screen (166); a plurality of water outlet holes (168) are circumferentially provided on the water distribution cylinder (167); and main liquid outlet holes (169) corresponding to the respective water outlet holes (168) are provided on the main distributor cover (161); An annular guide plate (17) is coaxially fixedly provided at one end of the water dividing cylinder (167) away from the second mounting ring (165); the inner wall and the outer wall of the guide plate (17) are respectively located at the inner and outer sides of the water dividing cylinder (167); the second mounting ring (165) is provided with a drainage hole (1651) located between two adjacent water outlet holes (168); the guide plate (17) is provided with drainage holes (171) distributed corresponding to each drainage hole (1651); each drainage hole (171) is located at one side of the outer wall of the water dividing cylinder (167); and the outer wall of the water dividing cylinder (167) is provided with a partition plate (1671) extending to the inner wall of the main distributor cover (161) on both sides of each water outlet hole (168); and both sides of the partition plate (1671) are respectively fixedly connected to the guide plate (17) and the second mounting ring (165).

5. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 4, characterized in that: A plurality of reinforcing plates (1641) are provided between the first mounting ring (164) and the second mounting ring (165) to abut against the conical screen (166). The reinforcing plates (1641) are located on a side of the conical screen (166) facing the main distributor cover (161). When the reinforcing plates (1641) are arranged opposite to the drainage holes (1651), the reinforcing plates (1641) are located at one end of the second mounting ring (165), and at this time, there is a gap between the reinforcing plates (1641) and the second mounting ring (165).

6. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 4, characterized in that: The drainage plate (17) is provided with a plurality of secondary liquid outlet holes (172) on the plate surface facing the inner wall of the water separation cylinder (167), each of the secondary liquid outlet holes (172) being located between two adjacent water outlet holes (168), one end of the water separation cylinder (167) penetrates into the contact plate (162) and there is a gap between the end and the inner hole of the annular contact plate (162), at which time the drainage plate (17) is installed on the water separation cylinder (167) and is located on the side of the contact plate (162) away from the conical screen (166) and is fixedly connected to the contact plate (162) by bolts, and each of the drainage holes (171) is located in the inner hole of the contact plate (162); The drainage plate (17) is coaxially provided with an annular sealing plate (173) fixedly connected to the material pushing plate (156) on a side away from the water distribution cylinder (167), and the sealing plate (173) is located between the drainage hole (171) and the secondary liquid outlet hole (172); The push plate (156) is provided with an axial hole (174) directly opposite to each secondary liquid outlet hole (172), and the inner wall of the water distribution cylinder (167) is provided with a second partition plate (175) located on two opposite sides of the water outlet hole (168), and one side of the second partition plate (175) is fixedly connected to the drainage plate (17).

7. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 6, characterized in that: A material distribution ring (176) is coaxially provided on the inner wall of the guide plate (17) and extends to the push plate (156). The material distribution ring (176) is circumferentially provided with material distribution holes (177) located corresponding to the axial holes (174). The outer diameter of the material distribution ring (176) is smaller than the diameter of the circles distributed around the axial holes (174).

8. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 7, characterized in that: The push plate (156) is fixedly connected to an annular auxiliary material distributor seat via a plurality of connecting rods (18) on a side away from the contact plate (162). The auxiliary material distributor seat comprises an auxiliary material distributor cylinder (181) coaxially distributed with the push plate (156) and a contact ring (182) coaxially arranged on a side of the auxiliary material distributor cylinder (181) away from the push plate (156). The contact ring (182) is directly opposite to the push plate (156) and its outer wall contacts the inner wall of the screen cylinder (12). The connecting rods (18) are fixed on the wall of the contact ring (182). Each of the axial holes (174) is located in the conical auxiliary material distributor cylinder (181).

9. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 8, characterized in that: The push plate (156) is provided with a plurality of connecting rods (19) extending from the auxiliary material distributor seat. Each of the connecting rods (19) is connected via an annular material stopper ring (191). A gap exists between the material stopper ring (191) and the auxiliary material distributor seat. The outer wall of the material stopper ring (191) extends to the inner wall of the abutment ring (182). The inner wall of the material stopper ring (191) extends to each pillar (155) and is provided with a groove for each pillar (155) to be embedded.

10. A double-push and double-outlet pusher centrifuge with a pre-thickening structure as claimed in claim 3 or 8, characterized in that: The product chamber (1) is provided with an outer feed plate (2) on the side of the screen cylinder (12) away from the hollow shaft (152), and an inner feed plate (21) on the side of the screen cylinder (12) close to the hollow shaft (152), and two solid phase discharge pipes (14) on the lower end wall of the product chamber (1) are respectively connected to the outer feed plate (2) and the inner feed plate (21); A washing pipe (22) is provided in the feed pipe (13), one end of the washing pipe (22) passes through the push plate (156), and the other end is provided with a bent pipe (221) that passes through the outer wall of the feed pipe (13), and a plurality of washing holes (222) are opened in the outer wall of the washing pipe (22) passing through the push plate (156); A second washing pipe (23) is provided on the door plate (132), the second washing pipe (23) is located above the feed pipe (13), one end of the second washing pipe (23) passes through the door plate (132), and the other end extends in the direction of the screen cylinder (12), and a plurality of nozzles for spraying toward the inner wall of the screen cylinder (12) are provided on the second washing pipe (23).

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