An overhung centrifuge discharge port closure device

Abstract

The application relates to the technical field of centrifuge discharge port closing devices, in particular to an upper-suspension type centrifuge discharge port closing device, which comprises a rotating drum matching device, a closing cover device, a driving device and a centrifuge shell, the sealing ring of the rotating drum matching device is fixedly installed on the centrifuge shell, the rear end of the closing cover cylinder of the driving device is rotatably installed at the lower end of the centrifugal shaft connecting sleeve of the rotating drum matching device through a rotating seat; the regular polygonal groove of the closing cover device is connected with the annular clamping groove of the driving device; the sliding sleeve is slidingly installed on the outer side of the cylinder protection cylinder, and the sliding sleeve and the cylinder protection cylinder are slidingly sealed; the sliding sleeve, the closing cover cover body and the circular ring realize sealing, so that the materials are sealed in the centrifuge shell, and the materials are prevented from being closed during stirring.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of centrifuges, in particular to an unloading port closing device of an upper suspension type centrifuge. BACKGROUND

[0002] In the use of the upper suspension type centrifuge, the working process of the centrifuge mainly includes feeding, dewatering, washing, drying, and unloading. The dry material separated by centrifugation is unloaded into the product bin through the unloading hole at the bottom of the centrifuge. During the feeding and washing processes, due to the splashing of air flow and liquid, some materials and mother liquor fall into the discharge port at the bottom of the drum, polluting the product. To prevent pollution during feeding and washing and solve this problem, an unloading port closing device of an upper suspension type centrifuge is specially designed. This device prevents materials, water, and steam in the inner cavity of the drum from entering the unloading port at the bottom of the drum, effectively improving the quality of dry materials. For example, Chinese patent 201911276656.5 provides an upper suspension type centrifuge, which includes an upper suspension type centrifuge base, a locking mechanism, and a plug-in mechanism. The top outer surface of the upper suspension type centrifuge base is fixedly installed with an upper suspension type centrifuge main body portion. The top outer surface of the upper suspension type centrifuge main body portion is fixedly installed with an upper suspension type centrifuge driving portion. The bottom outer surface of the upper suspension type centrifuge base is provided with four groups of damping shock absorbers, which are distributed at the bottom corners of the upper suspension type centrifuge base. The damping shock absorbers are detachably connected to the upper suspension type centrifuge base through the locking mechanism and the plug-in mechanism. The upper suspension type centrifuge disclosed in the present application is provided with a locking mechanism and a plug-in mechanism. The disassembly and assembly of the entire structure can be completed by pulling the pull ring. After assembly, the connection strength is high and the device is not easy to fall off, which is more stable and beneficial to use, bringing better use prospect.

[0003] However, the existing upper suspension type centrifuge and other centrifuges that unload materials from the lower part of the centrifuge all have the problem of dripping from the unloading hole at the bottom of the drum. Therefore, there is an urgent need to invent an upper suspension type centrifuge unloading port closing device that prevents materials from leaking out of the closing cover device during the stirring of materials to solve the above technical problems. SUMMARY

[0004] To solve the above technical problems, the sliding sleeve of the present application is slidingly installed outside the cylinder protection cylinder, and the sliding sleeve and the cylinder protection cylinder are slidingly sealed. The sliding sleeve, the closing cover body, and the circular ring realize sealing, thereby sealing the materials inside the centrifuge shell, preventing materials from leaking out of the closing.

[0005] The technical scheme used by the present application is: an unloading port closing device of an overhung centrifuge, characterized in that the device comprises a drum matching device, a closing cover device, a driving device and a centrifuge shell, a sealing ring of the drum matching device is fixedly installed on the centrifuge shell, a rear end of a closing cover cylinder of the driving device is rotatably installed on a lower end of a centrifugal shaft connecting sleeve of the drum matching device through a rotating seat; a regular polygon slot of the closing cover device is connected with an annular clamping slot of the driving device;

[0006] The closing cover device comprises a circular ring, an inclined surface is arranged on the circular ring, and a sealing rubber is arranged on the inclined surface of the circular ring; a support slot is arranged inside the sealing rubber, a regular polygon slot is arranged at the center of the circular ring, and the regular polygon slot is fixedly connected with the circular ring through the support slot;

[0007] The driving device comprises a closing cover cylinder, a cylinder protection cylinder is installed outside the closing cover cylinder, a sliding sleeve is slidably installed outside the cylinder protection cylinder, and the sliding sleeve is connected with the support slot through a connecting rod; a closing cover cover body is arranged on the sliding sleeve, the closing cover cover body is in a conical shape, and a lower end of the closing cover cover body is fixedly connected with the inner side of the circular ring; the connecting rod is arranged inside the closing cover cover body.

[0008] Preferably, a fixed circular ring is arranged below the sealing ring, the fixed circular ring is fixedly connected with the centrifuge shell through screws, and an inclined surface is arranged on the inner side of the sealing ring, and the inclination of the inclined surface is consistent with the inclination of the sealing rubber.

[0009] Preferably, an air outlet hole is arranged on the inclined surface of the inner side of the sealing ring.

[0010] Preferably, an annular clamping slot is arranged at the end of a piston rod of the closing cover cylinder, and the annular clamping slot is slidably installed inside the regular polygon slot.

[0011] Preferably, a clamping rod is slidably installed inside the support slot, the clamping rod comprises a rod body, an inclined block is arranged at the outer end of the rod body, a V-shaped slot is arranged at the inner end of the rod body, the V-shaped slot is arranged inside the regular polygon slot, and the inner side of the V-shaped slot is in contact with the annular clamping slot.

[0012] Preferably, a triangular plate is fixedly installed on a fixed plate above the support slot, at least one hand air pump is arranged on the fixed plate above the support slot, a lower end of the hand air pump is connected with the triangular plate, and an upper end of the hand air pump is fixedly connected with the cylinder protection cylinder.

[0013] Preferably, a connecting plate is arranged on the triangular plate, and the connecting plate is rotatably connected with a blowing mechanism at the outer end.

[0014] Preferably, the blowing mechanism comprises a cylinder fixing plate, which is rotationally connected with the connecting plate; the cylinder fixing plate is provided with a sliding cylinder, and the air outlet pipe is slidingly installed in the sliding cylinder; the sliding cylinder is provided with a spring, which resets the air outlet pipe; a rotary motor is arranged outside the connecting plate, and the rotary motor is fixedly connected with the connecting plate, and the motor shaft is fixedly connected with the cylinder fixing plate.

[0015] Preferably, the manual air pump, the triangular plate, the connecting plate, the sliding cylinder and the air outlet pipe are sequentially connected.

[0016] Preferably, the centrifugal shaft connecting sleeve is fixedly connected with the centrifugal shaft, and the rotating drum is arranged below the centrifugal shaft connecting sleeve.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] 1. The sliding sleeve is slidingly installed outside the cylinder protection cylinder, and the sliding sleeve is in sliding sealing with the cylinder protection cylinder; sealing is realized through the sliding sleeve, the cover body of the closing cover and the circular ring, so that the material is sealed in the centrifugal machine shell, and the material is prevented from leaking out of the closing cover device during stirring of the material.

[0019] 2. The sealing ring is in contact with the sealing rubber through the inner inclined surface of the sealing ring, so that sealing is realized; a limiting groove is arranged below the fixed circular ring, the limiting groove is open at the inner side, and a spring and a plug are arranged in the limiting groove; the plug is slidingly installed in the limiting groove, and the plug is used for sealing the limiting groove, so that the material is prevented from entering the limiting groove, the inclined block cannot be inserted into the limiting groove, and sealing failure is caused; and the spring is used for resetting.

[0020] 3. The present application is provided with an air outlet, which is used for blowing away the material above the sealing rubber, so as to facilitate the sealing cooperation of the sealing rubber and the inner inclined surface of the sealing ring. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a closed cover closed state structure schematic diagram of the overall structure of the present application.

[0022] Figure 2 It is a closed cover closed cross-sectional state structure schematic diagram of the overall structure of the present application.

[0023] Figure 3 It is a closed cover open state structure schematic diagram of the overall structure of the present application.

[0024] Figure 4 It is a closed cover open cross-sectional state structure schematic diagram of the overall structure of the present application.

[0025] Figure 5 It is a front structure schematic diagram of the rotating drum cooperation device of the present application.

[0026] Figure 6Another angle structural schematic view of the drum matching device of the present application.

[0027] Figure 7 First angle structural schematic view of the closure cover device of the present application.

[0028] Figure 8 Second angle structural schematic view of the closure cover device of the present application.

[0029] Figure 9 Third angle structural schematic view of the closure cover device of the present application.

[0030] Figure 10 Structural schematic view of the clamping rod of the present application.

[0031] Figure 11 Structural schematic view of the Figure 9 Enlarged structural schematic view of A of the present application.

[0032] Figure 12 First angle structural schematic view of the driving device of the present application.

[0033] Figure 13 Second angle structural schematic view of the driving device of the present application.

[0034] Figure 14 Third angle structural schematic view of the driving device of the present application.

[0035] Figure 15 Structural schematic view of the driving device of the present application in cross-section state.

[0036] Brief Description of the Drawings: 1 - drum matching device; 2 - closure cover device; 3 - driving device; 4 - centrifuge shell; 11 - centrifugal shaft connecting sleeve; 12 - drum; 13 - sealing ring; 14 - fixed ring; 15 - limiting groove; 16 - air outlet hole; 21 - ring; 22 - sealing rubber; 23 - manual air pump; 24 - supporting groove; 25 - clamping rod; 251 - rod body; 252 - V-shaped groove; 253 - inclined block; 26 - regular polygonal groove; 27 - connecting plate; 28 - triangular plate; 29 - air blowing mechanism; 291 - air outlet pipe; 292 - sliding cylinder; 293 - air cylinder fixing plate; 294 - rotary motor; 31 - closure cover air cylinder; 32 - air cylinder protection cylinder; 33 - sliding sleeve; 34 - closure cover body; 35 - connecting rod; 36 - annular clamping groove. DETAILED DESCRIPTION

[0037] The technical solutions of the present application will be further specifically described below by examples in combination with the drawings.

[0038] The technical solutions of the present application will be further described in detail below with examples and in conjunction with the drawings. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many different ways other than those described herein, and one of ordinary skill in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific examples disclosed below.

[0039] It should be noted that the terms "one embodiment", "an embodiment", "exemplary embodiment", "some embodiments", etc. in the description mean that the embodiments can include a particular feature, structure or characteristic, but every embodiment can not necessarily include the particular feature, structure or characteristic. In addition, such terms do not necessarily refer to the same embodiment. In addition, when a particular feature, structure or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the art to implement such a feature, structure or characteristic in connection with other embodiments whether explicitly described or not.

[0040] In addition, spatial relative terms, such as "under", "below", "lower", "above", "upper" and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the drawings. The spatial relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the drawings. The device can have other orientations (rotated 90 degrees or otherwise) and the spatial relative descriptors used herein can be interpreted accordingly.

[0041] It should be noted that in this paper, some connection methods, such as "fixed connection, fixed installation", refer to the fixing of two components, including but not limited to: welding, screw nut fixing, sticking, riveting, interference fit, etc.

[0042] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15As shown in the figure, a kind of upper suspension centrifuge discharge port closing device, including drum cooperation device 1, closing cover device 2, driving device 3 and centrifuge shell 4, the sealing ring 13 of drum cooperation device 1 is fixedly installed on centrifuge shell 4, the rear end of closing cover cylinder 31 of driving device 3 is rotatably installed in the lower end of centrifugal shaft connecting sleeve 11 of drum cooperation device 1 by rotating seat;The regular polygon slot 26 of closing cover device 2 is connected with the annular clamping groove 36 of driving device 3;

[0043] Closing cover device 2 includes circular ring 21, the upper surface of circular ring 21 is inclined plane, and sealing rubber 22 is arranged on the inclined plane of circular ring 21;Support groove 24 is arranged inside sealing rubber 22, regular polygon slot 26 is arranged in the center of circular ring 21, and regular polygon slot 26 is fixedly connected with circular ring 21 through support groove 24;Sealing rubber 22 is moved to contact sealing ring 13, and then fitting and sealing are completed;

[0044] Driving device 3 includes closing cover cylinder 31, cylinder protection cylinder 32 is installed outside closing cover cylinder 31, sliding sleeve 33 is slidably installed outside cylinder protection cylinder 32, and sliding sleeve 33 is connected with support groove 24 through connecting rod 35;Sealing cover body 34 is arranged on the upper surface of sliding sleeve 33, sealing cover body 34 is in the form of a cone, and the lower end of sealing cover body 34 is fixedly connected with the inner side of circular ring 21;Connecting rod 35 is inside sealing cover body 34, and connecting rod 35 plays the role of supporting sealing cover body 34;The upper end of sealing cover body 34 is fixedly sealed with the lower end of sliding sleeve 33, and the lower end of sealing cover body 34 is fixedly sealed with the inner side of circular ring 21;Specifically, sliding sleeve 33 is slidably installed outside cylinder protection cylinder 32, and sliding sleeve 33 is slidably sealed with cylinder protection cylinder 32;Sealing is realized by sliding sleeve 33, sealing cover body 34 and circular ring 21, so that the materials are sealed in centrifuge shell 4, to prevent materials from leaking out of closing cover device 2 when stirring materials.

[0045] In one optional embodiment of the embodiment of the application, as shown in Figure 5 And Figure 6 In order to achieve better sealing effect, fixed circular ring 14 is arranged below sealing ring 13, and fixed circular ring 14 is fixedly connected with centrifuge shell 4 through screws;The inner side of sealing ring 13 is provided with an inclined surface, the inclination of the inclined surface is consistent with the inclination of sealing rubber 22, the inner side of sealing ring 13 is contacted with sealing rubber 22 to realize sealing, limiting groove 15 is arranged below fixed circular ring 14, the inner side of limiting groove 15 is opened, spring and plug are arranged in limiting groove 15, the plug is slidably installed in limiting groove 15, and the plug is used for sealing limiting groove 15, to prevent materials from entering limiting groove 15, so that inclined block 253 cannot be inserted into limiting groove 15, and then sealing failure is caused, and the spring is used for resetting.

[0046] In one optional embodiment of the embodiment of the application,Figure 6 As shown in the drawings, in order to make the sealing effect better, the air outlet hole 16 is arranged on the inner side slope of the sealing ring 13, which is used to blow away the material on the sealing rubber 22, and facilitates the sealing cooperation between the sealing rubber 22 and the inner side slope of the sealing ring 13.

[0047] In an optional embodiment of the present application, Figure 12 Figure 13 Figure 14 Figure 15 As shown in the drawings, in order to make the inclined block 253 move away from the limiting groove 15, the piston rod end of the closing cover cylinder 31 is provided with an annular clamping groove 36 which is slidingly installed inside the regular polygonal groove 26.

[0048] In an optional embodiment of the present application, Figure 7 Figure 8 Figure 9 Figure 10 As shown in the drawings, in order to facilitate the closer cooperation between the sealing rubber 22 and the fixed ring 14, the clamping rod 25 is slidingly installed inside the supporting groove 24, and the clamping rod 25 comprises a rod body 251, an inclined block 253 arranged at the outer end of the rod body 251, and a V-shaped groove 252 arranged at the inner end of the rod body 251, which is located inside the regular polygonal groove 26 and in contact with the annular clamping groove 36; a spring is arranged on the rod body 251 to move the rod body 251 outward; when the annular clamping groove 36 is elongated, the annular clamping groove 36 contacts the V-shaped groove 252, thereby moving the plurality of V-shaped grooves 252 towards the center and pulling the inclined block 253 to move away from the limiting groove 15.

[0049] In an optional embodiment of the present application, Figure 7 Figure 8 Figure 9 Figure 10 As shown in the drawings, in order to realize automatic inflation, the triangular plate 28 is fixedly installed on the fixed plate above the supporting groove 24, and at least one manual air pump 23 is arranged on the fixed plate above the supporting groove 24; the lower end of the manual air pump 23 is connected with the triangular plate 28, and the upper end of the manual air pump 23 is fixedly connected with the cylinder protection cylinder 32; through the contraction of the closing cover cylinder 31, the regular polygonal groove 26 is driven to contract, the regular polygonal groove 26 drives the manual air pump 23 to compress, and the manual air pump 23 is compressed to inflate.

[0050] In an optional embodiment of the present application, Figure 9 Figure 10 Figure 11 As shown in the drawings, the triangular plate 28 is provided with a connecting plate 27, and the outer end of the connecting plate 27 is rotatably connected with the air blowing mechanism 29; the air blowing mechanism 29 is inflated by contacting the hole on the fixed ring 14.

[0051] ​​​​​​​​​​​In an optional embodiment of the embodiment of the present application, Figure 9 and Figure 11 As shown in the figure, the blowing mechanism 29 comprises a cylinder fixing plate 293, which is rotationally connected with the connecting plate 27; the cylinder fixing plate 293 is provided with a sliding cylinder 292, and the air outlet pipe 291 is slidingly installed in the sliding cylinder 292; the hand air pump 23, the triangular plate 28, the connecting plate 27, the sliding cylinder 292 and the air outlet pipe 291 are sequentially connected. The centrifugal shaft connecting sleeve 11 is fixedly connected with the centrifugal shaft, and the rotary drum 12 is arranged below the centrifugal shaft connecting sleeve 11; the sliding cylinder 292 is provided with a spring, which resets the air outlet pipe 291; a rotary motor 294 is arranged outside the connecting plate 27, which is fixedly connected with the connecting plate 27, and the motor shaft is fixedly connected with the cylinder fixing plate 293; the rotary motor 294 is operated to drive the blowing mechanism 29 to rotate; when it is needed to unload the material, the cylinder fixing plate 293 is driven by the rotary motor 294 to rotate, and then the air outlet pipe 291 and the sliding cylinder 292 are rotated to below the triangular plate 28, thereby preventing the material from blocking the air outlet pipe 291; when the material is unloaded, it is needed to close the unloading port, at this time, the rotary motor 294 is operated to rotate the cylinder fixing plate 293, so that the air outlet pipe 291 is opposite to the air holes below the fixed ring 14; the closing cover cylinder 31 drives the closing cover device 2 to move upward, so that the air outlet pipe 291 is connected with the air holes below the fixed ring 14.

[0052] Working principle: when working, the material is first placed in the centrifuge shell 4, and then the centrifugal shaft connecting sleeve 11 is driven by the motor to rotate the rotary drum 12, so that the material is stirred or washed, etc.; when the treatment is completed, the closing cover cylinder 31 is operated to elongate, so that the annular clamping groove 36 moves downward, and then the annular clamping groove 36 moves all the V-shaped grooves 252 to the center, so that the inclined blocks 253 are away from the limiting grooves 15, and then the annular clamping groove 36 continues to move downward, and the annular clamping groove 36 pushes the V-shaped grooves 252 to push the regular polygonal groove 26, so that the entire closing cover device 2 moves downward, so that the sealing rubber 22 is separated from the sealing ring 13, thereby facilitating the material to flow out (such as Figure 3 and Figure 4When the material is unloaded, the closing cover cylinder 31 works to close the ring-shaped clamping groove 36, and the V-shaped groove 252 is moved outward under the spring force. Then the closing cover cylinder 31 continues to contract, driving the regular polygonal groove 26 and the closing cover device 2 to move upward. Then the rotary motor 294 works to rotate the air cylinder fixing plate 293 by a certain angle, driving the air outlet pipe 291 to be opposite to the air hole below the fixed ring 14. Then the closing cover cylinder 31 continues to contract, driving the air outlet pipe 291 to contact the air hole below the fixed ring 14. Then the manual air pump 23 is compressed, and the air pump 23 generates air. The air passes through the connecting plate 27, the sliding cylinder 292, the air outlet pipe 291, and then enters the hole of the fixed ring 14. Then the air passes through the air outlet hole 16 and blows onto the sealing rubber 22, so as to blow the sealing rubber 22 clean, and then the sealing rubber 22 is sealed with the inner inclined surface of the sealing ring 13. Then the closing cover device 2 continues to move upward, and the clamping rod 25 is inserted into the limiting groove 15, so as to realize automatic fixing.

Claims

1. An overhead centrifuge discharge port closure apparatus, characterized by, It includes: The drum matching device (1), the closing cover device (2), the driving device (3) and the centrifuge shell (4), the sealing ring (13) of the drum matching device (1) is fixedly installed on the centrifuge shell (4), the rear end of the closing cover cylinder (31) of the driving device (3) is rotatably installed on the lower end of the centrifugal shaft connecting sleeve (11) of the drum matching device (1) through the rotating seat;The polygonal groove (26) of the closing cover device (2) is connected with the annular clamping groove (36) of the driving device (3); The closing cover device (2) includes a circular ring (21), the upper surface of the circular ring (21) is inclined, and a sealing rubber (22) is arranged on the inclined surface of the circular ring (21);A support groove (24) is arranged in the sealing rubber (22), a polygonal groove (26) is arranged at the center of the circular ring (21), and the polygonal groove (26) is fixedly connected with the circular ring (21) through the support groove (24); The driving device (3) includes a closing cover cylinder (31), a cylinder protection cylinder (32) is installed outside the closing cover cylinder (31), a sliding sleeve (33) is slidably installed outside the cylinder protection cylinder (32), and the sliding sleeve (33) is connected with the support groove (24) through a connecting rod (35);A closing cover cover body (34) is arranged on the upper surface of the sliding sleeve (33), the closing cover cover body (34) is in the form of a cone, and the lower end of the closing cover cover body (34) is fixedly connected with the inner side of the circular ring (21);The connecting rod (35) is inside the closing cover cover body (34); A fixed circular ring (14) is arranged below the sealing ring (13), and the fixed circular ring (14) is fixedly connected with the centrifuge shell (4) through screws;An inclined surface is arranged on the inner side of the sealing ring (13), and the inclination of the inclined surface is consistent with the inclination of the inclined surface of the sealing rubber (22); It also includes a clamping rod (25), which is slidably installed in the support groove (24), the clamping rod (25) includes a rod body (251), an inclined block (253) is arranged at the outer end of the rod body (251), a V-shaped groove (252) is arranged at the inner end of the rod body (251), the V-shaped groove (252) is located inside the polygonal groove (26), and the inner side of the V-shaped groove (252) is in contact with the annular clamping groove (36); It also includes a blowing mechanism (29), which includes a gas cylinder fixing plate (293), and the gas cylinder fixing plate (293) is rotatably connected with the connecting plate (27);A sliding cylinder (292) is arranged on the gas cylinder fixing plate (293), and a gas outlet pipe (291) is slidably installed in the sliding cylinder (292);A spring is arranged in the sliding cylinder (292), the spring resets the gas outlet pipe (291), a rotary motor (294) is arranged on the outer side of the connecting plate (27), the rotary motor (294) is fixedly connected with the connecting plate (27), and the motor shaft is fixedly connected with the gas cylinder fixing plate (293) First, the material is put into the centrifuge shell (4), then through the motor driven centrifugal shaft connecting sleeve (11) and then drive drum (12) rotation, through the drum (12) will be material stirring or washing, etc., when the processing is complete, then through the closure cover cylinder (31) work, closure cover cylinder (31) elongation, in turn drive ring clamping groove (36) to move down, in turn ring clamping groove (36) will all the V-shaped groove (252) to the center, in turn make the inclined block (253) away from the limit groove (15), then ring clamping groove (36) continues to move down, ring clamping groove (36) push V-shaped groove (252) in turn push the regular polygon slot (26) make the whole closure cover device (2) move down, in turn make the sealing rubber (22) and sealing ring (13) separate, in turn facilitate the material outflow; when the material is unloaded, through the closure cover cylinder (31) work, closure cover cylinder (31) shrink drive ring clamping groove (36) no longer press V-shaped groove (252), V-shaped groove (252) in the spring force to move outwards; then the closure cover cylinder (31) continues to shrink, drive regular polygon slot (26) in turn drive the closure cover device (2) to move up, then the rotary motor (294) work make the air cylinder fixed plate (293) rotation a certain angle, in turn make the air outlet pipe (291) opposite fixed ring (14) below the air hole, then the closure cover cylinder (31) continues to shrink, drive air outlet pipe (291) contact to fixed ring (14) below the air hole, then manual air pump (23) compression, manual air pump (23) produce gas, gas through the connecting plate (27), through the sliding cylinder (292), air outlet pipe (291) and then enter the fixed ring (14) hole, in turn gas through the air outlet hole (16) out, gas through the air outlet hole (16) blow to the sealing rubber (22) on the top, in turn blow clean sealing rubber (22) on the top, in turn facilitate the sealing rubber (22) and sealing ring (13) inside the inclined surface sealing cooperation; then the closure cover device (2) continues to move up, make the clamping rod (25) inserted into the limit groove (15), in turn realize automatic fixing.

2. An overhung centrifuge discharge port closure device according to claim 1, wherein, The air outlet hole (16) is arranged on the inner inclined surface of the sealing ring (13).

3. A top suspension centrifuge discharge port closure device according to claim 1, wherein The piston rod end of the closure cover cylinder (31) is provided with a ring clamping groove (36), and the ring clamping groove (36) is slidably installed in the regular polygon slot (26).

4. A top suspension centrifuge discharge port closure device according to claim 1 wherein, Further comprising a triangular plate (28), the triangular plate (28) is fixedly installed on the fixed plate above the support groove (24), and at least one manual air pump (23) is arranged on the fixed plate above the support groove (24); the lower end of the manual air pump (23) is connected with the triangular plate (28), and the upper end of the manual air pump (23) is fixedly connected with the cylinder protection cylinder (32).

5. A top suspension centrifuge discharge port closure device according to claim 4, wherein The triangular plate (28) is provided with a connecting plate (27), and the outer end of the connecting plate (27) is rotatably connected with the air blowing mechanism (29).

6. A top suspension centrifuge discharge port closure device according to claim 5, wherein The manual air pump (23), the triangular plate (28), the connecting plate (27), the sliding cylinder (292) and the air outlet pipe (291) are sequentially connected. The manual air pump (23), the triangular plate (28), the connecting plate (27), the sliding cylinder (292) and the air outlet pipe (291) are sequentially connected.

7. A top suspension centrifuge discharge port closure device as claimed in any one of claims 1 to 6, wherein, The centrifugal shaft connecting sleeve (11) is fixedly connected with the centrifugal shaft, and a rotating drum (12) is arranged below the centrifugal shaft connecting sleeve (11).

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