Energy-saving centrifuge bag pulling and twisting switching device and centrifuge

Abstract

The present invention relates to an energy-saving centrifuge bag pulling and twisting switching device and a centrifuge thereof. By improving the structure for driving two pin shafts to move axially, one of the pin shafts can remain plugged into the corresponding guide groove when not driven by a wedge block, and the other pin shaft remains separated from the corresponding guide groove, thereby achieving the goal of keeping the bag pulling centrifuge in a pulling and twisting mode state in an unpowered state. At this time, since there is no need to drive the two pin shafts, the switching piston cylinder does not need to provide power, and no energy is consumed. Ultimately, the technical problem that the current centrifuge bag pulling and twisting mode switching device has to maintain an energy consumption state for a long time when in use, resulting in poor energy-saving effect is solved.

Description

Technical Field

[0001] The invention relates to the technical field of centrifuges, and in particular to an energy-saving centrifuge bag pulling and twisting switching device and a centrifuge thereof. Background Art

[0002] A bag-pulling centrifuge refers to a centrifuge in which the filter bag inside the filter cartridge can be pulled downward and straightened to improve the effect of removing residual filter cake on the filter bag. However, in actual production, if the filter bag is simply pulled downward and straightened or shaken, part of the filter cake will still stick to the surface of the filter bag and cannot be removed. In response to this technical problem, an invention patent application with application number 202210608245.7 discloses an "alternating pulling and twisting mechanism applied to a bag-pulling centrifuge", which can realize bidirectional twisting of the bag, thereby greatly improving the filter cake cleaning effect.

[0003] However, when this alternating pulling and twisting mechanism is used, each time the bag twisting mode is switched, the lifting piston cylinder needs to be driven. After the bag twisting mode is switched, the lifting piston cylinder needs to maintain the driving force to maintain this bag twisting mode, so as to prevent the pin shaft inserted into the slide slot from moving outwards autonomously under the action of elastic force, and the part not inserted into the slide slot is inserted into the slide slot, and finally both pin shafts are partially inserted into the corresponding slide slot, affecting the normal lifting of the center shaft. Therefore, this structure needs to maintain power for a long time during the centrifuge cake cleaning stage, which requires a long time to consume energy. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an energy-saving centrifuge bag pulling and twisting mode switching device to solve the technical problem that the current centrifuge bag pulling and twisting mode switching device has to maintain an energy consumption state for a long time during use, resulting in poor energy saving effect.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: an energy-saving centrifuge bag pulling and twisting mode switching device, which is applied to a bag pulling centrifuge, comprising two sets of pin shaft seats fixedly connected to the lower end of a passive pulley of the centrifuge, and a pin shaft is slidably connected to the two sets of pin shaft seats, respectively. The two pin shafts are radially arranged along the central axis of the centrifuge and correspond one to one to the two guide grooves on the central axis. The lower end of the passive pulley is also coaxially connected to a sleeve, which is sleeved on the outside of the pin shaft seat, and the sleeve is provided with two circumferentially arranged and axially extended slide grooves. A lifting ring plate is arranged in the sleeve, and sliding rods corresponding to the two slide grooves are arranged on the outer edge of the lifting ring plate. The lifting ring plate is sleeved outside the central axis and is located below the two pin shaft seats. The two sliding rods respectively pass through the corresponding slide grooves and extend out of the sleeve and are connected to a connecting ring. The connecting ring is coaxially arranged with the sleeve and has a clearance fit. A switching piston cylinder for driving the lifting ring plate to lift is connected to the base of the centrifuge.

[0006] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs that are respectively provided with a plurality of springs and a plurality of springs that are provided with springs.

[0007] The end of the pin shaft passing through the through hole away from the central axis is located outside the baffle and is rotatably connected to a horizontally arranged roller. The axial direction of the roller is perpendicular to the pin shaft, and there is a gap between the roller and the baffle. A wedge block that cooperates with the roller is connected to the lifting ring plate, and the top of the wedge block has a guide surface inclined upward and outward. The wedge block is located between the roller and the baffle. When the wedge block is lifted, the guide surface of the wedge block contacts the roller and pushes the roller and the pin shaft connecting the roller to move in a direction away from the central axis.

[0008] The side of the rotating arm facing away from the central axis is an inclined surface facing obliquely downward. The lifting ring plate is connected to a lifting plug plate that cooperates with the inclined surface of the rotating arm. The top of the lifting plug plate is adapted to the inclined surface. When the lifting plug plate is lifted, the upper end of the rotating arm is driven to rotate toward the central axis, thereby pushing the corresponding pin axis to move toward the direction of the central axis.

[0009] As a preferred solution, the sliding rod or connecting ring is connected to a vertically arranged support rod, the support rod corresponds to the roller, the top of the support rod is connected to a safety block that passes through the sliding groove and extends into the sleeve, the safety block corresponds to the roller, when the lifting ring plate is located at the lower dead point, the safety block is opposite to the roller and the distance between the two is less than the depth of the guide groove, the safety block prevents the pin shaft connected to the roller from accidentally detaching from the corresponding guide groove.

[0010] As a preferred solution, the upper and lower ends of the baffle are connected to the corresponding pin seats through an upper connecting plate and a lower supporting plate respectively.

[0011] As a preferred solution, the push rod of the switching piston cylinder is arranged downward, and a support connected to the base is arranged between the switching piston cylinder and the central axis, the support extends downward, and the lower end of the support is rotatably connected to a connecting rod, the support is connected to the middle part of the connecting rod, one end of the connecting rod is hinged to the free end of the push rod of the switching piston cylinder, and the other end extends to the bottom of the connecting ring, when the push rod of the switching piston cylinder is extended downward, the free end of the connecting rod is tilted upward to drive the lifting ring plate to rise, and when the push rod of the switching piston cylinder is retracted upward, the free end of the connecting rod falls downward, and the lifting ring plate falls under the action of its own gravity.

[0012] As a preferred solution, the lower end of the sleeve is connected to a limit plate extending radially inward, and the limit plate is an annular plate or a plate with several circumferential discrete portions. The upper surface of the limit plate is flush with the bottom surface of the slide groove, and the lifting ring plate abuts against the limit plate when it is at the lower dead point.

[0013] As a preferred solution, two guide grooves are arranged on both sides of the central axis, one of which is a straight groove extending along the axial direction of the central axis, and the other is an inclined groove inclined to the axial direction of the central axis.

[0014] As a preferred solution, the pin connected to the roller corresponds to a guide groove parallel to the axial direction of the central axis.

[0015] A further technical problem to be solved by the present invention is to provide a bag pulling centrifuge to solve the technical problem of high energy consumption of the conventional bag pulling centrifuge with pulling and twisting mode switching.

[0016] In order to solve the above technical problems, the technical solution adopted by the present invention is: a bag-pulling centrifuge, comprising a base, an axle seat connected to the base and arranged vertically, a hollow rotating shaft rotatably connected in the axle seat and arranged vertically, a rotating drum fixedly connected to the top of the rotating shaft, a passive pulley fixedly connected to the lower end of the rotating shaft, a main drive fixedly connected to the base and transmission-connected to the passive pulley, a shell connected to the base and covering the rotating drum, a central shaft coaxially arranged in the rotating shaft, a bag-pulling bracket connected to the top of the central shaft, and a lifting driver connected to the lower end of the central shaft for driving the central shaft to rise and fall, a distributor and a scraper mechanism with a lower end inserted into the rotating drum are connected to the shell, a filter bag is arranged on the inner wall of the rotating drum, the top of the filter bag is fixedly connected to the top of the rotating drum, the bottom of the filter bag is connected to the bag-pulling bracket, a plurality of circumferentially evenly distributed blanking openings are provided on the bottom surface of the rotating drum, a discharge opening corresponding to the blanking opening is provided on the base, and the above-mentioned energy-saving centrifuge bag-pulling and twisting mode switching device is also included.

[0017] As a preferred solution, an isolation cover is connected to the lower end of the shaft seat, the isolation cover is located on the periphery of the connecting ring and the sliding rod, a long hole is opened on the side wall of the isolation cover for the free end of the connecting rod to pass through, the free end of the connecting rod can move up and down in the long hole, the discharge port is located outside the isolation cover, the isolation cover prevents materials from contaminating the transmission structure of the pin shaft, the lifting drive is fixedly connected to the bottom of the isolation cover through a connecting frame, the lifting drive is an oil cylinder, and the push rod of the lifting drive is coaxially connected to the lower end of the center shaft through a rotating joint.

[0018] The beneficial effect of the present invention is as follows: the present invention improves the structure for driving the axial movement of the two pin shafts, so that one of the pin shafts can remain plugged into the corresponding guide groove when not driven by the wedge block, and the other pin shaft remains separated from the corresponding guide groove, thereby achieving the goal of keeping the bag pulling centrifuge in a pulling and twisting mode in an unpowered state. At this time, since there is no need to drive the two pin shafts, the switching piston cylinder does not need to provide power, and no energy is consumed. Ultimately, the technical problem that the current centrifuge bag pulling and twisting mode switching device has to maintain an energy consumption state for a long time when in use, resulting in poor energy saving effect is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0020] Figure 1 It is a structural schematic diagram of the energy-saving centrifuge bag pulling and twisting mode switching device of the present invention;

[0021] Figure 2 yes Figure 1 A magnified view of part A in FIG.

[0022] Figure 3 It is a schematic diagram of the structure of a bag pulling centrifuge using the energy-saving centrifuge bag pulling and twisting mode switching device of the present invention;

[0023] Figure 4 yes Figure 3 The schematic diagram of the bag pulling centrifuge bag pulling state is shown;

[0024] Figure 1~Figure 4Middle: 1. Passive pulley, 2. Pin seat, 3. Pin, 4. Center shaft, 5. Guide groove, 6. Sleeve, 7. Slide, 8. Lifting ring plate, 9. Slide rod, 10. Connecting ring, 11. Base, 12. Switching piston cylinder, 13. Baffle, 14. Retaining ring, 15. Elastic part, 16. Rotating arm, 17. Hinge shaft, 18. Articulated seat, 19. Convex arc surface, 20. Through hole, 21. Roller, 22. Wedge, 23. Guide surface, 24. Inclined surface, 25. Lifting plug plate, 26. Support rod, 27. Safety block, 28. Upper connecting plate, 29, lower supporting plate, 30, support, 31, connecting rod, 32, limiting plate, 33, shaft seat, 34, rotating shaft, 35, rotating drum, 36, main drive, 37, outer shell, 38, bag pulling bracket, 39, lifting drive, 40, distributor, 41, scraper mechanism, 42, filter bag, 43, drop port, 44, discharge port, 45, energy-saving centrifuge bag pulling and twisting mode switching device, 46, isolation cover, 47, long hole, 48, connecting frame, 49, rotating joint, 50, through hole, 51, guide bucket. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Example 1

[0026] like Figure 1 and Figure 2The energy-saving centrifuge bag pulling and twisting mode switching device shown is applied to the bag pulling centrifuge, including two sets of pin seats 2 fixedly connected to the lower end of the passive pulley 1 of the centrifuge, and a pin 3 is slidably connected to each of the two sets of pin seats 2. The two pins 3 are radially arranged along the central axis 4 of the centrifuge and correspond one to one to the two guide grooves 5 on the central axis 4. The lower end of the passive pulley 1 is also coaxially connected to a sleeve 6, which is sleeved on the outside of the pin seat 2. The sleeve 6 is provided with two circumferentially arranged and axially extended slide grooves 7. A lifting ring plate 8 is arranged in the sleeve 6, and a sliding rod 9 corresponding to the two slide grooves 7 is arranged on the outer edge of the lifting ring plate 8. The lifting ring plate is sleeved outside the central axis 4 and is located below the two pin seats 2. The two sliding rods 9 respectively pass through the corresponding slide grooves 7 and extend out of the sleeve 6 and are connected to a connecting ring 10. The connecting ring 10 is coaxially arranged with the sleeve 6 and has a clearance fit. A switching piston cylinder 12 for driving the lifting ring plate 8 to lift is connected to the base 11 of the centrifuge. The push rod of the switching piston cylinder 12 is set downward, and a support 30 connected to the base 11 is set between the switching piston cylinder 12 and the central axis 4. The support 30 extends downward, and the lower end of the support 30 is rotatably connected to a connecting rod 31. The support 30 is connected to the middle of the connecting rod 31. One end of the connecting rod 31 is hinged to the free end of the push rod of the switching piston cylinder 12, and the other end extends to the bottom of the connecting ring 10. When the push rod of the switching piston cylinder 12 is extended downward, the free end of the connecting rod 31 is tilted upward to drive the lifting ring plate 8 to rise. When the push rod of the switching piston cylinder 12 is retracted upward, the free end of the connecting rod 31 falls downward, and the lifting ring plate 8 falls under the action of its own gravity.

[0027] In addition to using the lever-type connecting rod 31 to drive the lifting ring plate 8 to rise and fall, the support 30 can also be omitted, and the connecting rod 31 can be directly connected to the push rod of the switching piston cylinder 12, and the rising of the switching piston cylinder 12 can be used to drive the connecting rod 31 to rise, thereby pushing up the lifting ring plate.

[0028] like Figure 2As shown, a baffle 13 is fixedly provided on the side of the left pin seat 2 of the two pin shaft seats 2 facing away from the central axis 4, and a through hole 20 is opened on the baffle 13 for the pin shaft 3 to pass through, and radially outwardly protruding retaining rings 14 are provided on both pin shafts 3. The pin shaft 3 on the left passes through the through hole 20 and the retaining ring 14 of the pin shaft 3 is located between the baffle 13 and the pin shaft seat 2, and an elastic member 15 is provided between the retaining ring 14 of the pin shaft 3 and the baffle 13, and the elastic member 15 is respectively abutted on the baffle 13 and the retaining ring 14 to drive the pin shaft 3 to move toward the central axis 4; the other pin shaft 3 on the right side is opposite to the central axis 4 on the side corresponding to A swivel arm 16 is provided, and the lower end of the swivel arm 16 is rotatably connected to the pin shaft seat 2 through a hinge shaft 17 and a hinge seat 18. The hinge shaft 17 is located below the pin shaft 3. The hinge shaft 17 is horizontally arranged and perpendicular to the pin shaft 3. The upper end of the swivel arm 16 extends to the top of the corresponding pin shaft 3. The side of the swivel arm 16 facing the central axis 4 is a convex arc surface 19, and the convex arc surface 19 abuts against the retaining ring 14 on the corresponding pin shaft 3. An elastic member 15 is also connected to the pin shaft 3 corresponding to the swivel arm 16. The elastic member 15 is arranged between the pin shaft seat 2 located on the right side and the retaining ring 14 of the pin shaft 3. The elastic member 15 drives the corresponding pin shaft 3 to move in a direction away from the central axis 4.

[0029] In this embodiment, the elastic member 15 is a spring, and in practical applications, the elastic member may also be a spring, but the spring has a smaller deformation distance and greater elasticity than a spring, and is therefore more suitable for this embodiment.

[0030] The end of the pin shaft 3 passing through the through hole 20 away from the central axis 4 is located outside the baffle 13 and is rotatably connected to a horizontally arranged roller 21. The axial direction of the roller 21 is perpendicular to the pin shaft 3. There is a gap between the roller 21 and the baffle 13. A wedge block 22 cooperating with the roller 21 is connected to the lifting ring plate 8. The top end of the wedge block 22 is inserted into the gap between the roller 21 and the baffle 13. The top of the wedge block 22 has a guide surface 23 inclined upward and outward. The wedge block 22 is located between the roller 21 and the baffle 13. When the wedge block 22 is lifted, the guide surface 23 of the wedge block 22 contacts the roller 21 and pushes the roller 21 and the pin shaft 3 connected to the roller 21 to move in a direction away from the central axis 4, so that the right end of the pin shaft 3 on the left side is disengaged from the corresponding guide groove 5.

[0031] The side of the rotating arm 16 facing away from the central axis 4 is an inclined surface 24 facing obliquely downward. A lifting plug plate 25 is connected to the lifting ring plate 8 and cooperates with the inclined surface 24 of the rotating arm 16. The top of the lifting plug plate 25 is adapted to the inclined surface 24. When the lifting plug plate 25 is lifted, the upper end of the rotating arm 16 is driven to rotate toward the central axis 4, thereby pushing the corresponding pin shaft 3 to move toward the direction of the central axis 4, so that the left end of the pin shaft 3 located on the right side is inserted into the corresponding guide groove 5.

[0032] In this embodiment, when the lifting ring plate 8 descends to the lower dead point under the action of its own weight, the pin shaft 3 located on the left side remains inserted into the corresponding guide groove 5 under the elastic force of the elastic member 15. When the central shaft 4 is lifted or lowered, the central shaft 4 is guided by the left pin shaft 3 and the guide groove 5 to perform a specific action, driving the bag pulling centrifuge to perform a certain mode of bag pulling action, such as vertical pulling or twisting pulling. When the lifting ring plate 8 is at the lower dead point, no external force is required to maintain its position state, so there is no need to switch the piston cylinder 12 to work. At this time, the switching piston cylinder 12 has no power output and can stop working, thereby achieving the energy saving goal.

[0033] like Figure 2 As shown, as an improvement on the above technical solution, the present embodiment further connects a vertically arranged support rod 26 to the slide rod 9 or the connecting ring 10, the support rod 26 corresponds to the roller 21, and a safety block 27 is connected to the top of the support rod 26, which passes through the slide groove 7 and extends into the sleeve 6, and the safety block 27 corresponds to the roller 21. When the lifting ring plate 8 is located at the lower dead point, the safety block 27 is opposite to the roller 21 and the distance between the two is less than the depth of the guide groove 5. The safety block 27 prevents the pin shaft 3 connected with the roller 21 from accidentally detaching from the corresponding guide groove 5, for example, when the elastic member 15 fails or the centrifugal force on the pin shaft 3 is greater than the elastic force provided by the elastic member 15.

[0034] In actual application, a support rod 26 corresponding to the pivot arm 16 can also be connected to the slide rod or the connecting ring 10, and a safety block 27 corresponding to the pivot arm 16 is connected to the support rod 26. When the lifting ring plate 8 is located at the lower dead point, the safety block 27 corresponding to the pivot arm 16 just corresponds to the pivot arm 16, preventing the pivot arm 16 from swinging to the right too much, so that the pivot arm 16 maintains the limit position on the corresponding pin shaft 3, preventing the pin shaft 3 located on the right side from falling out of the corresponding pin shaft seat 2 under the action of centrifugal force.

[0035] The safety block 27 corresponding to the rotating arm 16 is disengaged from the corresponding relationship with the rotating arm 16 when the lifting ring plate 8 rises. The rotating arm 16 is pushed by the lifting plug plate 25 to keep the corresponding pin 3 in position.

[0036] In this embodiment, a through hole 50 extending along the axial direction of the pin 3 is further provided on the rotating arm 16. Figure 2 As shown, the right end of the pin shaft 3 located on the right side is inserted into the through hole 50, and the retaining ring on the pin shaft 3 is threadedly connected to the pin shaft 3, so that the depth of the pin shaft 3 inserted into the corresponding guide groove 5 can be adjusted.

[0037] The upper and lower ends of the baffle 13 in this embodiment are connected to the corresponding pin shaft seat 2 through an upper connecting plate 28 and a lower supporting plate 29 respectively. This connection structure makes the connection between the baffle 13 and the pin shaft seat 2 more stable.

[0038] In order to further improve the stability of the lifting ring plate 8 when it is at the lower dead point, in this embodiment, a limit plate 32 extending radially inward is connected to the lower end of the sleeve 6. The limit plate 32 is an annular plate or a plate with several circumferential discrete portions. The upper surface of the limit plate 32 is flush with the bottom surface of the slide groove 7, and the lifting ring plate 8 is in contact with the limit plate 32 when it is at the lower dead point.

[0039] In this embodiment, two guide grooves 5 are arranged on both sides of the central axis 4, one of which is a straight groove extending along the axial direction of the central axis 4, guiding the central axis 4 to only do axial lifting and lowering movements. The other guide groove 5 is an oblique groove inclined to the axial direction of the central axis 4, guiding the central axis 4 to do twisting movements while lifting and lowering. The two guide grooves 5 correspond to two bag pulling and twisting modes respectively.

[0040] In this embodiment, the pin shaft 3 connected with the roller 21 corresponds to the guide groove 5 parallel to the axial direction of the central axis 4. Because the straight pull mode of the bag pulling centrifuge is a conventional mode, it is usually used more times than the twist pull mode, so this setting can further improve the energy saving effect. Example 2

[0041] like Figure 3 The centrifuge shown in the figure is a bag pulling centrifuge, which includes a base 11, a shaft seat 33 connected to the base 11 and arranged vertically, a hollow rotating shaft 34 rotatably connected in the shaft seat 33 and arranged vertically, a rotating drum 35 fixedly connected to the top of the rotating shaft 34, a passive pulley 1 fixedly connected to the lower end of the rotating shaft 34, a main driver 36 fixedly connected to the base 11 and drivingly connected to the passive pulley 1, a housing 37 connected to the base 11 and covering the rotating drum 35, a central shaft 4 coaxially arranged in the rotating shaft 34, a bag pulling bracket 38 connected to the top of the central shaft 4, and a lifting driver 39 connected to the lower end of the central shaft 4 for driving the central shaft 4 to rise and fall, wherein the outer The shell 37 is connected with a distributor 40 and a scraper mechanism 41 with the lower end inserted into the drum 35. A filter bag 42 is arranged on the inner wall of the drum 35. The top of the filter bag 42 is fixedly connected to the top of the drum 35, and the bottom of the filter bag 42 is connected to the bag-pulling bracket 38. A plurality of circumferentially evenly distributed drop openings 43 are provided on the bottom surface of the drum 35. A discharge opening 44 corresponding to the drop opening 43 is provided on the base 11. A guide bucket 51 is also provided in the drum 35. The guide bucket 51 is formed by connecting a cone bucket located at the upper part and a straight tube located at the lower part. The cone bucket has a large upper opening and a small lower opening. The upper end of the guide bucket 51 is sealed with the inner wall of the drum, and the lower end is connected to the periphery of the drop opening 43 on the bottom surface of the drum. The lower end of the bag-pulling bracket 38 is inserted into the straight tube of the guide bucket 51. It also includes the energy-saving centrifuge bag-pulling and twisting mode switching device 45 described in the above embodiment 1.

[0042] In this embodiment, an isolation cover 46 is connected to the lower end of the shaft seat 33. The isolation cover 46 is located on the periphery of the connecting ring 10 and the sliding rod 9. A long hole 47 is opened on the side wall of the isolation cover 46 for the free end of the connecting rod 31 to pass through. The free end of the connecting rod 31 can move up and down in the long hole 47. The discharge port 44 is located outside the isolation cover 46. The isolation cover 46 prevents materials from contaminating the transmission structure of the pin shaft 3. The lifting drive 39 is fixedly connected to the bottom of the isolation cover 46 through a connecting frame 48. The lifting drive 39 is an oil cylinder, and the push rod of the lifting drive 39 is coaxially connected to the lower end of the central shaft 4 through a rotating joint 49.

[0043] like Figure 4 As shown, when the lifting driver 39 drives the central shaft 4 to descend, the top of the central shaft 4 drives the bag-pulling bracket 38 to descend, and the bag-pulling bracket 38 pulls the lower end of the filter bag 42 to descend. The bag-pulling bracket 38 straightens the filter bag 42 originally attached to the inner wall of the drum 35. By repeatedly lifting and lowering the central shaft 4, the filter bag 42 can be repeatedly stretched, so that the filter cake and filter residue fall off and fall into the drop port 43 of the drum 35 along the filter bag 42.

[0044] The working principle of the present invention is: Figure 1~Figure 4 As shown, the present invention improves the structure for driving the axial movement of the two pin shafts 3 so that one of the pin shafts 3 can remain plugged into the corresponding guide groove 5 when not driven by the wedge block 22, and the other pin shaft 3 remains separated from the corresponding guide groove 5, thereby achieving the goal of keeping the bag pulling centrifuge in a pulling and twisting mode in an unpowered state. At this time, since there is no need to drive the two pin shafts 3, the switching piston cylinder 12 does not need to provide power, and no energy is consumed. Ultimately, the technical problem that the current centrifuge bag pulling and twisting mode switching device has to maintain an energy consumption state for a long time when in use, resulting in poor energy saving effect is solved.

[0045] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. An energy-saving centrifuge bag pulling and twisting mode switching device, applied to a bag pulling centrifuge, comprising two sets of pin seats (2) fixedly connected to the lower end of a passive pulley (1) of the centrifuge, wherein a pin (3) is slidably connected to each of the two sets of pin seats (2), and the two pins (3) are radially arranged along a central axis (4) of the centrifuge and correspond one to one to two guide grooves (5) on the central axis (4), characterized in that: The lower end of the passive pulley (1) is also coaxially connected to a sleeve (6), the sleeve (6) is sleeved on the outside of the pin shaft seat (2), two circumferentially arranged and axially extending slide grooves (7) are opened on the sleeve (6), a lifting ring plate (8) is arranged in the sleeve (6), and the outer edge of the lifting ring plate (8) is provided with a slide rod (9) corresponding to the two slide grooves (7), the lifting ring plate is sleeved on the outside of the central shaft (4) and is located below the two pin shaft seats (2), the two slide rods (9) respectively pass through the corresponding slide grooves (7) and extend out of the sleeve (6) and are connected to a connecting ring (10), the connecting ring (10) and the sleeve (6) are coaxially arranged and clearance-matched, and a switching piston cylinder (12) for driving the lifting ring plate (8) to rise and fall is connected to the base (11) of the centrifuge; A baffle (13) is fixedly arranged on the side of one of the two pin shaft seats (2) facing away from the central axis (4), and a through hole (20) is provided on the baffle (13) for the pin shaft (3) to pass through. Both pin shafts (3) are provided with radially outwardly protruding retaining rings (14). One pin shaft (3) passes through the through hole (20) and the retaining ring (14) of the pin shaft (3) is located between the baffle (13) and the pin shaft seat (2). An elastic member (15) is arranged between the retaining ring (14) of the pin shaft (3) and the baffle (13), and the elastic member (15) is respectively abutted against the baffle (13) and the retaining ring (14) to drive the pin shaft (3) to move in the direction of the central axis (4); a rotating arm is correspondingly arranged on the side of the other pin shaft (3) facing away from the central axis (4). (16), the lower end of the rotating arm (16) is rotatably connected to the pin shaft seat (2) through a hinge shaft (17) and a hinge seat (18), the hinge shaft (17) is located below the pin shaft (3), the hinge shaft (17) is horizontally arranged and perpendicular to the pin shaft (3), the upper end of the rotating arm (16) extends to the top of the corresponding pin shaft (3), the side of the rotating arm (16) facing the central axis (4) is a convex arc surface (19), and the convex arc surface (19) abuts against the retaining ring (14) on the corresponding pin shaft (3), and the pin shaft (3) corresponding to the rotating arm (16) is also connected to an elastic member (15), the elastic member (15) is arranged between the pin shaft seat (2) and the retaining ring (14) of the pin shaft (3), and the elastic member (15) drives the corresponding pin shaft (3) to move in a direction away from the central axis (4); One end of the pin shaft (3) passing through the through hole (20) away from the central axis (4) is located outside the baffle (13) and is rotatably connected to a horizontally arranged roller (21). The axial direction of the roller (21) is perpendicular to the pin shaft (3). There is a gap between the roller (21) and the baffle (13). A wedge block (22) cooperating with the roller (21) is connected to the lifting ring plate (8). The top of the wedge block (22) has a guide surface (23) inclined upward and outward. The wedge block (22) is located between the roller (21) and the baffle (13). When the wedge block (22) is lifted, the guide surface (23) of the wedge block (22) contacts the roller (21) and pushes the roller (21) and the pin shaft (3) connected to the roller (21) to move in a direction away from the central axis (4). The side of the rotating arm (16) facing away from the central axis (4) is an inclined surface (24) facing obliquely downward, and the lifting ring plate (8) is connected to a lifting plug plate (25) that matches the inclined surface (24) of the rotating arm (16), and the top of the lifting plug plate (25) is adapted to the inclined surface (24). When the lifting plug plate (25) is lifted, the upper end of the rotating arm (16) is driven to rotate toward the central axis (4), thereby pushing the corresponding pin shaft (3) to move in the direction of the central axis (4); The slide bar (9) or the connecting ring (10) is connected to a vertically arranged support bar (26), the support bar (26) corresponds to the roller (21), the top end of the support bar (26) is connected to a safety block (27) that passes through the slide groove (7) and extends into the sleeve (6), the safety block (27) corresponds to the roller (21), when the lifting ring plate (8) is located at the lower dead point, the safety block (27) and the roller (21) are opposite and the distance between the two is less than the depth of the guide groove (5), the safety block (27) prevents the pin shaft (3) connected to the roller (21) from accidentally leaving the corresponding guide groove (5); The push rod of the switching piston cylinder (12) is arranged downward, and a support (30) connected to the base (11) is arranged between the switching piston cylinder (12) and the central axis (4). The support (30) extends downward, and the lower end of the support (30) is rotatably connected to a connecting rod (31). The support (30) is connected to the middle of the connecting rod (31). One end of the connecting rod (31) is hinged to the free end of the push rod of the switching piston cylinder (12), and the other end extends to the bottom of the connecting ring (10). When the push rod of the switching piston cylinder (12) extends downward, the free end of the connecting rod (31) tilts upward to drive the lifting ring plate (8) to rise. When the push rod of the switching piston cylinder (12) retracts upward, the free end of the connecting rod (31) falls downward, and the lifting ring plate (8) falls under the action of its own gravity.

2. The energy-saving centrifuge bag pulling and twisting mode switching device according to claim 1 is characterized in that: The upper and lower ends of the baffle (13) are connected to the corresponding pin shaft seat (2) via an upper connecting plate (28) and a lower supporting plate (29) respectively.

3. The energy-saving centrifuge bag pulling and twisting mode switching device according to claim 1 is characterized in that: The lower end of the sleeve (6) is connected to a limit plate (32) extending radially inwards. The limit plate (32) is a ring plate or a plate with several circumferentially discrete parts. The upper surface of the limit plate (32) is flush with the bottom surface of the slide groove (7). When the lifting ring plate (8) is at the lower dead point, it abuts against the limit plate (32).

4. The energy-saving centrifuge bag pulling and twisting mode switching device according to any one of claims 1 to 3, characterized in that: The two guide grooves (5) are arranged on both sides of the central axis (4), one of the guide grooves (5) is a straight groove extending along the axial direction of the central axis (4), and the other guide groove (5) is an inclined groove inclined to the axial direction of the central axis (4).

5. The energy-saving centrifuge bag pulling and twisting mode switching device according to claim 4 is characterized in that: The pin shaft (3) connected to the roller (21) corresponds to a guide groove (5) parallel to the axial direction of the central axis (4).

6. A bag centrifuge, comprising a base (11), a shaft seat (33) connected to the base (11) and arranged vertically, a hollow rotating shaft (34) rotatably connected in the shaft seat (33) and arranged vertically, a rotating drum (35) fixedly connected to the top of the rotating shaft (34), a passive pulley (1) fixedly connected to the lower end of the rotating shaft (34), a main driver (36) fixedly connected to the base (11) and drivingly connected to the passive pulley (1), a housing (37) connected to the base (11) and covering the rotating drum (35), a central shaft (4) coaxially arranged in the rotating shaft (34), and a pulling shaft (35) connected to the top of the central shaft (4). A bag bracket (38) and a lifting driver (39) connected to the lower end of the central shaft (4) for driving the central shaft (4) to rise and fall, the outer shell (37) is connected to a distributor (40) and a scraper mechanism (41) whose lower end is inserted into the drum (35), a filter bag (42) is arranged on the inner wall of the drum (35), the top of the filter bag (42) is fixedly connected to the top of the drum (35), the bottom of the filter bag (42) is connected to the bag pulling bracket (38), a plurality of circumferentially evenly distributed drop openings (43) are provided on the bottom surface of the drum (35), and a discharge opening (44) corresponding to the drop opening (43) is provided on the base (11), characterized in that: It also includes the energy-saving centrifuge bag pulling and twisting mode switching device (45) as described in any one of claims 1 to 5.

7. The bag pulling centrifuge according to claim 6, characterized in that: The lower end of the shaft seat (33) is connected to an isolation cover (46). The isolation cover (46) is located outside the connecting ring (10) and the sliding rod (9). A long hole (47) is provided on the side wall of the isolation cover (46) for the free end of the connecting rod (31) to pass through. The free end of the connecting rod (31) can move up and down in the long hole (47). The discharge port (44) is located outside the isolation cover (46). The isolation cover (46) prevents materials from contaminating the transmission structure of the pin shaft (3). The lifting drive (39) is fixedly connected to the bottom of the isolation cover (46) through a connecting frame (48). The lifting drive (39) is an oil cylinder. The push rod of the lifting drive (39) is coaxially connected to the lower end of the central shaft (4) through a rotating joint (49).

Images