A flat plate sedimentation centrifuge

Abstract

A flat plate sedimentation centrifuge includes a bottom plate, a motor, a drum, and a casing; a damping shock absorber is arranged on the lower side of the bottom plate; the drum and the motor are arranged on the upper side of the bottom plate, and the motor is connected to the drum by belt transmission; the casing covers the outer side of the drum, and an upper cover is arranged on the upper side of the casing; an explosion-proof lamp, a scraping mechanism, a liquid inlet pipe, a material level detector, and an observation port are arranged on the upper cover; a sight glass made of transparent material is arranged on the observation port; a pumping device and a feed pipe are also arranged on the casing corresponding to the upper side of the drum, and the pumping device includes a tube body, a support, a hand wheel and a nut, and the tube body can reciprocate relative to the support axis; the hand wheel drives the nut to rotate, thereby controlling the advance and retreat of the tube body, and after each work process is completed, the hand wheel only needs to be turned to return the tube body to the initial state to complete the entire work process. It has excellent safety performance, precise operation, reasonable design, easy cleaning, high degree of automation, and can effectively reduce labor intensity, improve production efficiency and drug quality.

Description

Technical Field

[0001] The invention relates to a flat plate sedimentation centrifuge. Background Art

[0002] Sedimentation centrifuges are widely used in the field of pharmaceutical production. Existing sedimentation centrifuges have complex operations and many unreasonable designs, which affect production efficiency. The specific defects are as follows: 1. The traditional sedimentation centrifuge has a three-legged structure, many sanitary dead corners, poor safety performance, the gas in the body is not closed, and the toxic and harmful gases cannot be effectively treated, which causes great harm to the operator's body and does not meet GMP requirements; 2. After centrifugation of the traditional sedimentation centrifuge, the solid phase needs to be scraped manually and transferred to another container for secondary dissolution processing of the solid phase material. Every 5 centrifuges need to be equipped with 4 to 5 people, the steps are complicated, the labor intensity is high, and the labor cost is high; 3. The traditional sedimentation centrifuge drum is equipped with a baffle plate, and there are many sanitary dead corners between the baffle plates, which are difficult to clean, and after adding the baffle plate, automatic scraping, stirring, and dissolution cannot be achieved; 4. The inlet and outlet and liquid extraction devices of the traditional sedimentation centrifuge all use fixed pipelines, and the position control is not accurate, which cannot adapt to the separation of different types of raw materials, etc. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a flat plate sedimentation centrifuge with excellent safety performance, precise operation, reasonable design, easy cleaning, high degree of automation, which can effectively reduce labor intensity and improve production efficiency and drug quality.

[0004] In order to solve the above technical problems, the present invention provides a flat plate sedimentation centrifuge, comprising a bottom plate, a motor, a drum, and a casing;

[0005] The bottom plate is arranged horizontally, and a number of damping shock absorbers are arranged on the lower side of the bottom plate;

[0006] The drum comprises a drum body, which is a vertically arranged cylindrical body with an open upper side, an annular liquid blocking plate extending horizontally inward is arranged at the upper open side of the drum body, a bearing is arranged at the upper position of the bottom plate corresponding to the center of the drum, a rotating shaft is arranged on the bearing, and the upper side of the rotating shaft is coaxially connected with the drum;

[0007] The motor is installed on the upper side of the bottom plate, and the output shaft of the motor is connected to the rotating shaft through a belt drive;

[0008] The casing is a vertically arranged cylinder with an open upper side, the casing covers the outer side of the drum, the upper side of the casing exceeds the upper side of the drum, the lower side of the casing is fixedly connected to the bottom plate, and an upper cover matching the casing is provided on the upper side of the casing;

[0009] A closed assembly is provided on the outside of the casing, and the closed assembly includes a hinge seat, a swing arm and a balancing oil cylinder. The hinge seat is fixedly connected to the upper part of the outer wall of the casing, one end of the swing arm in the length direction is fixedly connected to the upper cover, and the other end of the swing arm in the length direction extends outward from the upper cover. The middle part of the swing arm is hinged to the hinge seat, and the other end of the swing arm is hinged to the piston rod of the balancing oil cylinder. The bottom of the balancing oil cylinder is hinged to the bottom plate.

[0010] A feed pipe is provided at the upper part of the circumferential side wall of the casing and penetrates the side wall of the casing in the horizontal direction. A 90° bend is provided vertically downward at one end of the feed pipe located inside the casing.

[0011] The upper cover is equipped with explosion-proof lamp, scraper mechanism, material level detector and observation port;

[0012] The explosion-proof lamp is arranged on the upper side of the upper cover, and the lower side of the explosion-proof lamp is connected to the inner side of the casing;

[0013] The scraper mechanism comprises a shell, a scraper plate and a scraper shaft; the scraper shaft is arranged in the shell, the middle part of the shell is fixedly connected to the upper cover of the centrifuge, vertically extends out from the lower side of the shell and extends into the drum; the scraper plate at the lower end of the scraper shaft is a vertically arranged rectangular plate, one side of the scraper plate in the length direction is connected to the lower part of the scraper shaft, a plurality of through grooves arranged at intervals along the length direction of the scraper plate are arranged on the lower side of the scraper plate, an L-shaped rod is arranged above each through groove at one side of the thickness direction of the scraper plate, the L-shaped rod is composed of a horizontal part and a vertical part connected end to end, and the horizontal part is connected to the scraper plate on the side away from the vertical part along its length direction , the vertical part extends vertically downward along one side away from the horizontal part in the length direction thereof, and the lower side of the vertical part is flush with the lower side of the scraper plate, the scraper shaft comprises a lifting cylinder and a rotating assembly, the scraper plate is connected to the lower part of the lifting cylinder body, the rotating assembly comprises a rotating chamber, a gear sleeve, a rack and two pistons, the rack and the two pistons are both in the rotating chamber, the two pistons are respectively fixed on both sides of the rack, the two pistons separate the two sides of the rotating chamber into two independent oil chambers, the two ends of the rotating chamber are respectively equipped with oil port joints identical to the two oil chambers, the gear sleeve is sleeved on the side wall of the lifting cylinder body, and the gear sleeve cooperates with the rack;

[0014] The material level detector comprises a connecting rod and a detection head, wherein the connecting rod is arranged vertically, the middle part of the connecting rod is fixedly connected to the upper cover, the lower side of the connecting rod extends into the drum from the upper side of the drum, and the detection head is connected to the lower side of the connecting rod;

[0015] The observation port passes through the upper cover, and a viewing mirror made of transparent material is provided on the observation port;

[0016] A pumping device is also provided above the drum at a position corresponding to the casing, and the pumping device comprises a horizontally arranged liquid collection pipe, a support, a hand wheel and a nut; the length direction of the liquid collection pipe is arranged along the radial direction of the drum, and the side of the pumping device close to the central axis of the drum along the radial direction of the drum is set as the front, and the side away from the central axis of the drum is set as the rear; the middle part of the outer side of the support is fixedly connected to the casing, a cavity is provided in the support which penetrates the support along the axial direction of the liquid collection pipe, a guide groove is provided at the front part of the cavity of the support, and a receiving part matching the nut is provided at the rear part of the inner side of the support, the receiving part extends backward to the rear side of the support, the nut is installed on the rear side of the support, the front part of the nut extends into the receiving part, the nut can rotate along the axis of the nut in the receiving part, and a A limiting pressure cover cooperates with the nut, the rear part of the nut exceeds the accommodating part, a coaxially connected hand wheel is provided at the rear position of the nut corresponding to the rear of the limiting cover, the rear part of the liquid taking tube is provided with an external thread matching the nut, the front part of the liquid taking tube is provided with a guide key matching the guide groove, the liquid taking tube passes through the nut and the support from back to front in sequence, the liquid taking tube can reciprocate back and forth in the cavity of the support, and the rear side of the liquid taking tube exceeds the rear side of the nut, and the front side of the liquid taking tube exceeds the front side of the support, the rear part of the liquid taking tube cooperates with the nut thread, and the front part of the liquid taking tube cooperates with the cavity key of the support; the front side of the liquid taking tube extends into the drum and bends downward 180° to face the side wall of the drum, the pipe mouth of the liquid taking tube is a round head, and liquid taking holes are provided on both sides of the round head.

[0017] For the purpose of simple explanation, the flat plate sedimentation centrifuge described in the present invention is referred to as the centrifuge below.

[0018] The working process and internal principle of this centrifuge are as follows: first, the material to be centrifuged is injected into the drum through the feed pipe for centrifugal operation, and then the liquid is extracted through the manually controlled liquid extraction device. The worker manually turns the handwheel to drive the nut to rotate, and the rotation of the nut drives the entire liquid extraction tube to move axially. The inner port of the liquid extraction tube gradually approaches the high-speed rotating liquid material in the drum. During the liquid extraction process, the inner end of the liquid extraction tube moves from the inside to the outside to extract the liquid phase to complete the liquid extraction operation; after the liquid extraction operation is completed, the handwheel is turned in the opposite direction to return the liquid extraction tube to the initial state to avoid affecting the next centrifugal operation; the remaining solid phase material after the liquid phase is extracted by the liquid extraction device will stick to the inner wall of the centrifuge drum. At this time, the rotating component passes through Change the pressure of the two oil pumps to control the scraper plate to rotate close to the inner wall of the drum. When it is 8-10mm away from the inner wall of the drum, it stops rotating and keeps the drum rotating at a low speed. As the drum rotates, the lifting cylinder controls the scraper plate to gradually move down. The materials attached to the inner wall of the drum are scraped off from top to bottom. After the scraping is completed, the scraper plate is reset and the drum stops running. At this time, open the sight glass, add the solvent used to dissolve the solid phase material into the drum, and then start the drum motor. The scraper plate rotates again to 8-10mm away from the inner wall of the drum, slowly descends to the bottom of the drum, and reciprocates up and down the liquid surface. At this time, the scraper plate with a through groove is equivalent to a material rake, which plays the role of crushing the solid phase material and stirring and dissolving. The solid phase materials at different liquid levels are crushed and stirred until they are dissolved. Finally, the liquid phase in the drum is extracted from the observation port to complete the entire workflow.

[0019] Advantages of this centrifuge: 1. This centrifuge uses a horizontal bottom plate instead of the tripod structure of the prior art, so that the support structure of this centrifuge is easy to clean, the safety performance is greatly improved, and toxic and harmful gases are easy to centrally treat. The weight of the bottom plate accounts for 20% to 30% of the total weight of this centrifuge, which can minimize the occurrence of resonance; 2. The manual liquid extraction device is accurate in operation, and the position of the liquid extraction pipe can be controlled in time according to the liquid situation in the drum to meet the needs of liquid extraction after centrifugal operation of different liquids; 3. The drum adopts an embedded liquid blocking plate, which is simple to process, beautiful in appearance, easy to clean, and the material blocking plate structure is cancelled, the sanitary dead corner is eliminated, and automatic unloading is realized; 4. The scraping mechanism automatically performs the scraping operation, and after scraping, the solid phase material is directly crushed and stirred and dissolved in the drum, with a high degree of automation, without manual intervention, and the number of operators for every 5 centrifuges is reduced to 2, without the need to transfer materials, which can simplify the operation steps, improve efficiency, and reduce costs. In summary, this centrifuge is simple to operate, reasonably designed, and can effectively improve production efficiency.

[0020] In order to achieve better use effect of this centrifuge, the preferred solution is as follows:

[0021] Preferably, the lower side of the vertical portion is provided with a taper, and the lower side of the scraper plate and the side of the scraper plate in the length direction away from the lifting cylinder are both provided with a slope.

[0022] The solid phase material after centrifugation is relatively hard. The slope set on the scraper plate is equivalent to a cutting edge, which can facilitate the scraper plate to be inserted into the solid phase material for scraping. The taper on the lower side of the vertical part facilitates insertion into the solid phase material, which can make it easier to break the solid phase material, thereby accelerating dissolution.

[0023] Preferably, a circumferentially arranged water channel is provided above the upper cover, the water channel is in the shape of a large half circle, a water inlet is provided on the upper side of the water channel, a plurality of vertically arranged water outlet pipes are provided on the lower side of the arc-shaped water channel, the lower side of the water outlet pipes passes through the upper cover from top to bottom, and a spherical nozzle is provided on the lower side of each water outlet pipe.

[0024] The water channel and the corresponding spherical nozzle can spray and clean the inside of the centrifuge, which is easy to use and saves manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of this centrifuge.

[0026] Figure 2 This is a top view of the centrifuge.

[0027] Figure 3 It is a structural schematic diagram of the scraping mechanism of the centrifuge.

[0028] Figure 4 It is a top view of the scraping mechanism of the centrifuge.

[0029] Figure 5 It is a structural schematic diagram of the scraper plate in the scraper mechanism of the centrifuge.

[0030] Figure 6 It is a structural schematic diagram of the centrifuge pumping device.

[0031] Figure 7 It is a structural diagram of the centrifuge level detector. DETAILED DESCRIPTION

[0032] See also Figure 1-Figure 7 , Figure 1 and Figure 2 This is only a schematic diagram of the overall structure of the centrifuge, in which the detailed structures of the scraper mechanism, drum, and pumping device are shown in Figure 3-Figure 7 shall prevail.

[0033] A flat plate sedimentation centrifuge comprises a bottom plate 1, a motor 14, a rotating drum 3, and a casing 2;

[0034] The bottom plate 1 is arranged horizontally, and a plurality of damping shock absorbers 11 are arranged on the lower side of the bottom plate 1;

[0035] The drum 3 includes a drum body, which is a vertically arranged cylindrical body with an open upper side. An annular liquid blocking plate 31 extending horizontally inward is provided at the upper open side of the drum body 3. A bearing 12 is provided at the upper position of the bottom plate 1 corresponding to the center of the drum 3. A rotating shaft 13 is provided on the bearing 12. The upper side of the rotating shaft 13 is coaxially connected to the drum 3.

[0036] The motor 14 is installed on the upper side of the bottom plate 1, and the output shaft of the motor 14 is connected to the rotating shaft 13 through a belt 15;

[0037] The casing 2 is a vertically arranged cylinder with an open upper side. The casing 2 covers the outer side of the drum 3. The upper side of the casing 2 exceeds the upper side of the drum 3. The lower side of the casing 2 is fixedly connected to the bottom plate 1. An upper cover 7 matching the casing 2 is provided on the upper side of the casing 2.

[0038] A closing assembly 4 is provided on the outside of the casing 2, and the closing assembly 4 includes a hinge seat 43, a rotating arm 42 and a balancing oil cylinder 41. The hinge seat 43 is fixedly connected to the upper part of the outer wall of the casing 2, one end of the rotating arm 42 in the length direction is fixedly connected to the upper cover 7, and the other end of the rotating arm 42 in the length direction extends outward from the upper cover 7. The middle part of the rotating arm 42 is hinged to the hinge seat 43, and the other end of the rotating arm 42 is hinged to the piston rod of the balancing oil cylinder 41. The bottom of the balancing oil cylinder 41 is hinged to the bottom plate 1;

[0039] A feed pipe 21 is provided at the upper portion of the circumferential side wall of the casing 2 and penetrates the side wall of the casing 2 in the horizontal direction. One end of the feed pipe 21 located inside the casing 2 is provided with a 90° bend vertically downward.

[0040] The upper cover 7 is provided with an explosion-proof lamp 73, a scraping mechanism 5, a material level detector 6, and an observation port 71;

[0041] The explosion-proof lamp 73 is arranged on the upper side of the upper cover 7, and the lower side of the explosion-proof lamp 73 is connected to the inner side of the housing 2;

[0042] The scraper mechanism 5 comprises a housing 51, a scraper plate 52 and a scraper shaft 53; the scraper shaft 53 is arranged in the housing 51, the middle of the housing 51 is fixedly connected to the centrifuge cover 7, vertically extends out of the lower side of the housing 51 and extends into the drum 3; the scraper plate 52 at the lower end of the scraper shaft 53 is a vertically arranged rectangular plate, one side of the scraper plate 52 in the length direction is connected to the lower part of the scraper shaft 53, and the lower side of the scraper plate 52 is provided with a plurality of through grooves 521 arranged at intervals along the length direction of the scraper plate 52, and the scraper plate 52 has a plurality of through grooves 521 arranged at intervals along the length direction of the scraper plate 52, and the scraper plate 52 has a plurality of through grooves 521 arranged at intervals above the through grooves 521 on one side of the thickness direction of the scraper plate 52. An L-shaped rod 54 is provided, and the L-shaped rod 54 is composed of a horizontal portion 541 and a vertical portion 542 connected end to end. The horizontal portion 541 is connected to the scraper plate 52 on the side away from the vertical portion 542 along its length direction, and the vertical portion 542 extends vertically downward on the side away from the horizontal portion 541 along its length direction, and the lower side of the vertical portion 542 is flush with the lower side of the scraper plate 52. The lower side of the vertical portion 542 is provided with a taper, and the lower side of the scraper plate 52 and the side of the scraper plate 52 in the length direction away from the lifting cylinder 531 are both provided with a slope. The scraper shaft 53 includes a lifting cylinder 531 and a rotating assembly 55. The scraper plate 52 is connected to the lower part of the cylinder body of the lifting cylinder 531. The rotating assembly 55 includes a rotating chamber 551, a gear sleeve 552, a rack 553 and two pistons 554. The rack 553 and the two pistons 554 are both in the rotating chamber 551. The two pistons 554 are respectively fixed on both sides of the rack 553. The two pistons 554 separate the two sides of the rotating chamber 551 into two independent oil chambers. The two ends of the rotating chamber 551 are respectively installed with oil port joints 555 that are the same as the two oil chambers. The gear sleeve 552 is sleeved on the side wall of the cylinder body of the lifting cylinder 531, and the gear sleeve 552 cooperates with the rack 553.

[0043] The material level detector 6 comprises a connecting rod 61 and a detection head 62. The connecting rod 61 is arranged vertically, the middle part of the connecting rod 61 is fixedly connected to the upper cover 7, the lower side of the connecting rod 61 extends from the upper side of the drum 3 into the drum 3, and the detection head 62 is connected to the lower side of the connecting rod 61;

[0044] The observation port 71 passes through the upper cover 7, and a viewing mirror 72 made of a transparent material is provided on the observation port 71;

[0045] A pumping device 9 is also provided above the drum 3 at a position corresponding to the casing 2, and the pumping device 9 comprises a horizontally arranged liquid taking pipe 91, a support 92, a hand wheel 93 and a nut 94; the length direction of the liquid taking pipe 91 is arranged along the radial direction of the drum 3, and the side of the pumping device 9 close to the central axis of the drum 3 along the radial direction of the drum 3 is set as the front, and the side away from the central axis of the drum 3 is set as the rear; the middle part of the outer side of the support 92 is fixedly connected to the casing 2, and a cavity 921 is provided in the support 92, which penetrates the support 92 along the axial direction of the liquid taking pipe 91, and a guide groove is provided at the front part of the cavity 921 of the support 92 (the guide groove is not shown in the figure); a receiving portion 922 matching the nut 94 is provided at the rear part of the inner side of the support 92, and the receiving portion 922 extends backward to the rear side of the support 92, and the nut 94 is installed on the rear side of the support 92, and the front part of the nut 94 extends into the receiving portion 922. The nut 94 can rotate along the axis of the nut 94 in the receiving portion 922, and the support A limiting pressure cover 95 matching with the nut 94 is provided at the rear side of the seat 92, the rear part of the nut 94 exceeds the accommodating portion 922, a coaxially connected hand wheel 93 is provided at the rear position of the nut 94 corresponding to the rear of the limiting cover, the rear part of the liquid taking tube 91 is provided with an external thread matching with the nut 94, the front part of the liquid taking tube 91 is provided with a guide key 911 matching with the guide groove, the liquid taking tube 91 passes through the nut 94 and the support 92 from back to front, and the liquid taking tube 91 is in the support The liquid taking tube 91 can reciprocate back and forth in the cavity 921 of the drum 92, and the rear side of the liquid taking tube 91 exceeds the rear side of the nut 94, and the front side of the liquid taking tube 91 exceeds the front side of the support 92. The rear part of the liquid taking tube 91 is threadedly matched with the nut 94, and the front part of the liquid taking tube 91 is keyed with the cavity 921 of the support 92; the front side of the liquid taking tube 91 extends into the drum 3 and bends downward 180° to face the side wall of the drum 3. The tube mouth of the liquid taking tube 91 is a round head, and liquid taking holes 912 are provided on both sides of the round head.

[0046] A circumferentially arranged water channel 8 is also provided above the upper cover 7. The water channel 8 is in the shape of a large half circle. A water inlet 83 is provided on the upper side of the water channel 8. A plurality of vertically arranged water outlet pipes 81 are provided on the lower side of the arc-shaped water channel 8. The lower side of the water outlet pipes 81 passes through the upper cover 7 from top to bottom, and a spherical nozzle 82 is provided on the lower side of each water outlet pipe 81.

[0047] The working process and internal principle of the centrifuge are as follows: first, the material to be centrifuged is injected into the drum 3 through the feed pipe 21 for centrifugal operation, and then the liquid is extracted through the manually controlled liquid extraction device 9. The worker manually rotates the hand wheel 93 to drive the nut 94 to rotate. The rotation of the nut 94 drives the entire liquid extraction tube 91 to move axially. The inner port of the liquid extraction tube 91 gradually approaches the high-speed rotating liquid material in the drum 3. During the liquid extraction process, the inner end of the liquid extraction tube 91 moves from the inside to the outside to extract the liquid phase to complete the liquid extraction operation; after the liquid extraction operation is completed, the hand wheel 93 is rotated in the opposite direction to return the liquid extraction tube 91 to the initial state to avoid affecting the next centrifugal operation; after the liquid phase is extracted by the liquid extraction device 9, the remaining solid phase material will adhere to the inner wall of the centrifuge drum 3. At this time, the rotating component 55 changes the The pressure of the two oil pumps controls the scraper plate 52 to rotate close to the inner wall of the drum 3. When the distance from the inner wall of the drum 3 is 8-10 mm, it stops rotating and keeps the drum 3 rotating at a low speed. As the drum 3 rotates, the lifting cylinder 531 controls the scraper plate 52 to gradually move downward. The materials attached to the inner wall of the drum 3 are scraped off from top to bottom. After the scraping is completed, the scraper plate 52 is reset and the drum 3 stops running. At this time, the sight glass 72 is opened, and the solvent for dissolving the solid phase material is added to the drum 3. Then the drum motor 14 is started, and the scraper plate 52 rotates again to 8-10 mm from the inner wall of the drum 3, slowly descends to the bottom of the drum 3, and reciprocates up and down the liquid surface. At this time, the scraper plate 52 with the through groove 521 is equivalent to a material rake, which plays the role of crushing the solid phase material and stirring and dissolving. The solid phase materials at different liquid levels are crushed and stirred until they are dissolved. Finally, the liquid phase in the drum 3 is extracted from the observation port 71 to complete the entire workflow.

[0048] Advantages of the centrifuge: 1. The centrifuge uses a horizontal bottom plate 1 instead of the tripod structure of the prior art, so that the support structure of the centrifuge is easy to clean, the safety performance is greatly improved, and it is convenient for the centralized treatment of toxic and harmful gases. The weight of the bottom plate 1 accounts for 20% to 30% of the total weight of the centrifuge, which can minimize the occurrence of resonance; 2. The manual liquid extraction device 9 is accurate in operation, and the position of the liquid extraction pipe 91 can be timely controlled according to the liquid situation in the drum 3 to meet the needs of liquid extraction after centrifugal operation of different liquids; 3. The drum 3 adopts an embedded liquid blocking plate 31, which is simple to process, beautiful in appearance, easy to clean, and the material blocking plate structure is cancelled, the sanitary dead corner is eliminated, and automatic unloading is realized; 4. The scraping mechanism 5 automatically performs the scraping operation, and after scraping, the solid phase material is directly crushed and stirred and dissolved in the drum 3, with a high degree of automation, without manual intervention, and the number of operators for every 5 centrifuges is reduced to 2, which can simplify the operation steps, reduce labor intensity, improve efficiency, and reduce costs. In summary, the centrifuge is simple to operate, reasonably designed, and can effectively improve production efficiency.

[0049] The solid phase material after centrifugation is relatively hard. The slope set on the scraper plate 52 is equivalent to a cutting edge, which can facilitate the scraper plate 52 to be inserted into the solid phase material for scraping. The taper on the lower side of the vertical portion 542 facilitates insertion into the solid phase material, which can make it easier to break the solid phase material, thereby accelerating dissolution.

[0050] A circumferentially arranged water channel 8 is also provided above the upper cover 7. The water channel 8 is in the shape of a large half circle. A water inlet 83 is provided on the upper side of the water channel 8. A plurality of vertically arranged water outlet pipes 81 are provided on the lower side of the arc-shaped water channel 8. The lower side of the water outlet pipes 81 passes through the upper cover 7 from top to bottom, and a spherical nozzle 82 is provided on the lower side of each water outlet pipe 81.

[0051] The water channel 8 and the corresponding spherical nozzle 82 can spray and clean the inside of the centrifuge, which is easy to use and saves manpower.

Claims

1. A flat plate decanter centrifuge, characterized in that: Including base plate, motor, drum and casing; The bottom plate is arranged horizontally, and a number of damping shock absorbers are arranged on the lower side of the bottom plate; The drum comprises a drum body, which is a vertically arranged cylindrical body with an open upper side, an annular liquid blocking plate extending horizontally inward is arranged at the upper open side of the drum body, a bearing is arranged at the upper position of the bottom plate corresponding to the center of the drum, a rotating shaft is arranged on the bearing, and the upper side of the rotating shaft is coaxially connected with the drum; The motor is installed on the upper side of the bottom plate, and the output shaft of the motor is connected to the rotating shaft through a belt drive; The casing is a vertically arranged cylinder with an open upper side, the casing covers the outer side of the drum, the upper side of the casing exceeds the upper side of the drum, the lower side of the casing is fixedly connected to the bottom plate, and an upper cover matching the casing is provided on the upper side of the casing; A closed assembly is provided on the outside of the casing, and the closed assembly includes a hinge seat, a swing arm and a balancing oil cylinder. The hinge seat is fixedly connected to the upper part of the outer wall of the casing, one end of the swing arm in the length direction is fixedly connected to the upper cover, and the other end of the swing arm in the length direction extends outward from the upper cover. The middle part of the swing arm is hinged to the hinge seat, and the other end of the swing arm is hinged to the piston rod of the balancing oil cylinder. The bottom of the balancing oil cylinder is hinged to the bottom plate. A feed pipe is provided at the upper part of the circumferential side wall of the casing and penetrates the side wall of the casing in the horizontal direction. A 90° bend is provided vertically downward at one end of the feed pipe located inside the casing. The upper cover is equipped with explosion-proof lamp, scraper mechanism, material level detector and observation port; The explosion-proof lamp is arranged on the upper side of the upper cover, and the lower side of the explosion-proof lamp is connected to the inner side of the casing; The scraper mechanism comprises a shell, a scraper plate and a scraper shaft; the scraper shaft is arranged in the shell, the middle part of the shell is fixedly connected to the upper cover of the centrifuge, vertically extends out from the lower side of the shell and extends into the drum; the scraper plate at the lower end of the scraper shaft is a vertically arranged rectangular plate, one side of the scraper plate in the length direction is connected to the lower part of the scraper shaft, a plurality of through grooves arranged at intervals along the length direction of the scraper plate are arranged on the lower side of the scraper plate, an L-shaped rod is arranged above each through groove at one side of the thickness direction of the scraper plate, the L-shaped rod is composed of a horizontal part and a vertical part connected end to end, and the horizontal part is connected to the scraper plate on the side away from the vertical part along its length direction , the vertical part extends vertically downward along one side away from the horizontal part in the length direction thereof, and the lower side of the vertical part is flush with the lower side of the scraper plate, the scraper shaft comprises a lifting cylinder and a rotating assembly, the scraper plate is connected to the lower part of the lifting cylinder body, the rotating assembly comprises a rotating chamber, a gear sleeve, a rack and two pistons, the rack and the two pistons are both in the rotating chamber, the two pistons are respectively fixed on both sides of the rack, the two pistons separate the two sides of the rotating chamber into two independent oil chambers, the two ends of the rotating chamber are respectively equipped with oil port joints identical to the two oil chambers, the gear sleeve is sleeved on the side wall of the lifting cylinder body, and the gear sleeve cooperates with the rack; The material level detector comprises a connecting rod and a detection head, wherein the connecting rod is arranged vertically, the middle part of the connecting rod is fixedly connected to the upper cover, the lower side of the connecting rod extends into the drum from the upper side of the drum, and the detection head is connected to the lower side of the connecting rod; The observation port passes through the upper cover, and a viewing mirror made of transparent material is provided on the observation port; A pumping device is also provided above the drum at a position corresponding to the casing, and the pumping device comprises a horizontally arranged liquid collection pipe, a support, a hand wheel and a nut; the length direction of the liquid collection pipe is arranged along the radial direction of the drum, and the side of the pumping device close to the central axis of the drum along the radial direction of the drum is set as the front, and the side away from the central axis of the drum is set as the rear; the middle part of the outer side of the support is fixedly connected to the casing, a cavity is provided in the support which penetrates the support along the axial direction of the liquid collection pipe, a guide groove is provided at the front part of the cavity of the support, and a receiving part matching the nut is provided at the rear part of the inner side of the support, the receiving part extends backward to the rear side of the support, the nut is installed on the rear side of the support, the front part of the nut extends into the receiving part, the nut can rotate along the axis of the nut in the receiving part, and a A limiting pressure cover matched with the nut, the rear part of the nut exceeds the accommodating part, a coaxially connected hand wheel is provided at the rear position of the nut corresponding to the rear of the limiting cover, the rear part of the liquid taking tube is provided with an external thread matching the nut, the front part of the liquid taking tube is provided with a guide key matching the guide groove, the liquid taking tube passes through the nut and the support from back to front in sequence, the liquid taking tube can reciprocate back and forth in the cavity of the support, and the rear side of the liquid taking tube exceeds the rear side of the nut, and the front side of the liquid taking tube exceeds the front side of the support, the rear part of the liquid taking tube is matched with the nut thread, and the front part of the liquid taking tube is matched with the cavity key of the support; the front side of the liquid taking tube extends into the drum and bends downward 180° to face the side wall of the drum, the pipe mouth of the liquid taking tube is a round head, and liquid taking holes are provided on both sides of the round head; The lower side of the vertical portion is provided with a taper, and the lower side of the scraper plate and the side of the scraper plate in the length direction away from the lifting cylinder are both provided with a slope; A circumferentially arranged water channel is also provided above the upper cover. The water channel is in the shape of a large half circle. A water inlet is provided on the upper side of the water channel. A plurality of vertically arranged water outlet pipes are provided on the lower side of the arc-shaped water channel. The lower side of the water outlet pipe passes through the upper cover from top to bottom, and a spherical nozzle is provided on the lower side of each water outlet pipe.

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