CN109731702B - Non-return device and drum for tubular separator with same - Google Patents
Non-return device and drum for tubular separator with same Download PDFInfo
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- CN109731702B CN109731702B CN201910056670.8A CN201910056670A CN109731702B CN 109731702 B CN109731702 B CN 109731702B CN 201910056670 A CN201910056670 A CN 201910056670A CN 109731702 B CN109731702 B CN 109731702B
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- 239000000463 material Substances 0.000 claims abstract description 95
- 239000007788 liquid Substances 0.000 claims abstract description 40
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 238000007789 sealing Methods 0.000 claims description 38
- 238000003825 pressing Methods 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 9
- 239000004519 grease Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 7
- 239000007791 liquid phase Substances 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 3
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- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000012224 working solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
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- 239000000725 suspension Substances 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
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Abstract
The invention discloses a non-return device, which comprises a valve seat and a conical piston, wherein the non-return device is arranged in a bottom shaft cover of a rotary drum; when the drum of the tubular separator rotates to a certain speed, centrifugal hydraulic pressure generated by working fluid in the check device drives the cone piston to move upwards by overcoming the pressure of the spring, so that the material hole on the valve seat is communicated with the bottom material channel of the bottom shaft cover, and the material enters the drum barrel on the upper part of the bottom shaft cover through the bottom material channel and the material hole to carry out centrifugal separation; when the rotating speed of the rotary drum is reduced to a certain value until the rotary drum stops, centrifugal hydraulic pressure generated by working liquid in the non-return device is not enough to overcome the pressure of the spring, so that the cone piston slides downwards to close the material hole and the material channel at the bottom of the bottom shaft cover, when the rotary drum stops rotating, a liquid phase in the rotary drum is blocked in the rotary drum barrel, the liquid phase can be conveniently and sanitarily taken out through a special tool and a special method, and the loss caused by mixing with lubricating grease in the feeding assembly in the outflow process is avoided.
Description
Technical Field
The invention belongs to the technical field of tubular separators, and particularly relates to a non-return device and a rotary drum for the tubular separator with the non-return device.
Background
The tubular separator is the type of industrial centrifuge with highest rotation speed and highest separation factor, and has powerful centrifugal force field formed through high rotation speed, centrifugal force to replace gravity, so that two or three kinds of different components in the material, including suspension or emulsion, are separated fast via specific weight difference and flow out or precipitate separately from their respective outlets to separate the material. At present, the tubular separator is widely applied to the fields of pharmacy, food, biological products, vaccine extraction, chemical engineering and the like, and is particularly applied to the field of pharmacy.
The structure of the tubular separator is shown in fig. 1, and mainly comprises a motor 01 arranged on a frame 05, a speed change mechanism 02 and a rotary drum 03, wherein a liquid inlet component 04 is arranged at the bottom of the rotary drum 03.
The structure of the liquid inlet assembly 04 is shown in fig. 2, and mainly comprises a feeding nozzle 045, a liquid inlet bearing seat 041, a sliding bearing 042, a spring damper 043, a large pressure cap 044 and other parts which are coaxially arranged in sequence from bottom to top, wherein the bottom of the feeding nozzle 045 is provided with a feeding pipe 046, the side surface of the liquid inlet bearing seat 041 is connected with a spiral cover type oil cup 048 through an oil cup connecting pipe 047 and is used for injecting lubricating grease into an oil passage in the liquid inlet bearing seat 041 to ensure the sufficient lubrication of the sliding bearing, and the extruded lubricating grease can drop into the liquid inlet bearing seat 041; meanwhile, an overflow port 049 is also formed in the side surface of the liquid inlet bearing seat 041; wherein, the liquid inlet bearing seat 041 is arranged at the lower part of the frame 05 through a rotating shaft 0410.
The structure of the drum 03 is shown in fig. 3, and includes a drum cylinder 031, three fins 035 are disposed inside the drum cylinder 031, a liquid outlet 032 is disposed at the top of the drum cylinder 031, a bottom shaft cover 033 is disposed at the bottom of the drum cylinder 032, a shaft sleeve 036 and a pressing cap 037 are disposed at the bottom of the bottom shaft cover 033, and a sealing gasket 034 is disposed at the bottom of the drum cylinder 031 and the bottom shaft cover 033.
The sliding bearing 042 and the shaft sleeve 036 at the lower part of the bottom shaft cover 033 move relatively, the feeding nozzle 045 is inserted into the bottom shaft cover 033, and a relatively large gap is formed between the outer wall surface of the feeding nozzle 045 and the inner wall surface of the bottom shaft cover 033, so that the scraping and rubbing cannot occur during working.
When the rotary drum 03 works in a rotating mode, as shown in fig. 4(1), materials to be separated enter the rotary drum 03 through the feeding pipe 046, the feeding nozzle 045 and the bottom shaft cover 033; the motor 01 drives the rotary drum 03 to rotate at a high speed through the speed change mechanism 02, materials can be layered or precipitated due to different densities of components under the action of a centrifugal force field, clear liquid at the innermost layer flows out from a liquid outlet at the upper part of the rotary drum 03, a solid phase A is precipitated on the inner wall of the rotary drum 03 and needs to be manually cleaned after being shut down, and meanwhile, a part of liquid phase B is arranged in the rotary drum 03 besides the precipitated solid phase A. When the rotary drum 03 stops rotating, as shown in fig. 4(2), the part of the liquid phase B left inside the rotary drum 03 flows out through the overflow port 049 on the side surface of the liquid inlet bearing seat 041 through the gap between the bottom shaft cover 033 and the liquid inlet nozzle 045, and the part of the material is mixed with the dropped grease C in the outflow process, so that the part of the outflow material is polluted, even though the dripping grease C is filtered, the dripping grease C cannot be completely treated, and some inevitable losses are caused.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a non-return device and a rotary drum for a tubular separator with the non-return device.
In order to achieve the purpose, the invention adopts the following technical scheme: a non-return device comprises a first valve seat, a first cone piston, a first spring, a first pressing cap and a first core piston which are coaxially arranged from bottom to top;
a first sliding hollow groove which penetrates through the upper surface and the lower surface of the first valve seat and is positioned at the upper part and a second sliding hollow groove which is positioned at the lower part are arranged in the first valve seat along the axial direction; the diameter of the first sliding hollow groove is larger than that of the second sliding hollow groove; a plurality of first material holes are uniformly formed in the lower part of the side surface of the first valve seat along the circumferential direction;
the first conical piston is of a cylinder structure with a bottom surface blocked, and the bottom surface of the first conical piston is of a conical surface structure; a first annular boss is coaxially arranged on the outer side wall of the first cone piston; the outer side wall of the lower part of the first conical piston is in sliding connection with the wall surface of the second sliding hollow groove, and the outer side wall of the first annular boss is in sliding connection with the wall surface of the first sliding hollow groove;
the first pressing cap is of an annular structure and is fixedly connected with the first valve seat;
the upper part of the first core piston is in clearance fit connection with a first valve seat and is tightly pressed and fixed by a first pressing cap, and the outer side wall of the middle part of the first core piston is in sliding connection with the inner wall surface of a first cone piston;
a first spring is arranged between the bottom end surface of the first core piston and the inner side bottom surface of the first cone piston;
a first cavity for containing working fluid is defined by the side wall of the first hollow sliding groove, the outer side wall of the first cone piston positioned below the first annular boss, the lower surface of the first annular boss and a step surface between the first sliding hollow groove and the second sliding hollow groove;
a second chamber for containing working fluid is defined by the inner side wall of the first cone piston, the inner bottom surface of the first cone piston and the outer bottom surface of the first core piston;
and a first communication hole for communicating the first chamber with the second chamber is formed in the side wall of the first cone piston.
Preferably, the diameter d of the outer side wall of the lower part of the first cone piston11Diameter d of the first sliding hollow groove12Diameter d of outer side wall in middle of first core piston13The following relationship is satisfied between the two components,
d12 2-d11 2＝d13 2
preferably, the wall surfaces of the second sliding hollow grooves at the upper part and the lower part of the first material hole are embedded with a first O-shaped ring for sealing.
Preferably, the outer side wall of the first annular boss is embedded with a first sealing O-ring.
Preferably, a first O-ring for sealing is embedded on the outer side wall of the lower part of the first core piston.
A rotary drum with a non-return device for a tubular separator comprises a first rotary drum barrel, wherein a first liquid outlet is formed in the top of the first rotary drum barrel, a first bottom shaft cover is arranged at the bottom of the first rotary drum barrel, a first shaft sleeve and a first shaft sleeve pressing cap are arranged at the bottom of the first bottom shaft cover, a first rotary drum sealing gasket is arranged between the first bottom shaft cover and the bottom of the first rotary drum barrel, and four fins are arranged inside the first rotary drum barrel;
the first bottom shaft cover is provided with a check device;
a first mounting groove is formed in the upper portion of a first bottom material channel of the first bottom shaft cover;
the bottom of the first valve seat is fixedly arranged in a first mounting groove, and a first sealing gasket is arranged between the first valve seat and the first mounting groove;
the outer wall surface of the first valve seat is fixedly connected with the four wings.
A non-return device comprises a second valve seat, a second conical piston, a spring baffle and a piston baffle which are coaxially arranged from bottom to top;
a third sliding hollow groove which penetrates through the upper surface and the lower surface of the second valve seat and is positioned at the upper part and a fourth sliding hollow groove which is positioned at the lower part are arranged in the second valve seat along the axial direction; the diameter of the third sliding hollow groove is larger than that of the fourth sliding hollow groove; a plurality of second material holes are uniformly formed in the lower part of the side surface of the second valve seat along the circumferential direction;
the second conical piston is of a cylinder structure with a blocked bottom surface, the bottom surface of the second conical piston is of a conical surface structure, and an inner hole of the second conical piston is of a circular truncated cone structure with a thick upper part and a thin lower part; a second annular boss is coaxially arranged at the upper part of the outer side wall of the second conical piston; the outer side wall of the lower part of the second conical piston is in sliding connection with the wall surface of the fourth sliding hollow groove, and the outer side wall of the second annular boss is in sliding connection with the wall surface of the third sliding hollow groove;
the spring baffle is fixedly arranged at the top of the inner hole of the second conical piston, and an air hole is formed in the middle of the spring baffle;
the upper part of the outer side wall of the second valve seat is fixedly provided with four wings, and the bottoms of the four wings are fixedly provided with wing baffle plates;
a second spring is arranged between the spring baffle and the wing baffle;
the piston baffle is fixedly arranged at the top of the inner hole of the second valve seat; the middle part of the piston baffle is provided with a through hole for the second spring to pass through;
a third cavity for containing working fluid is defined by the side wall of the third hollow sliding groove, the outer side wall of the second conical piston positioned below the second annular boss, the lower surface of the second annular boss and a step surface between the third sliding hollow groove and the fourth sliding hollow groove;
a fourth chamber for containing working fluid is defined by the inner side wall of the second conical piston, the inner bottom surface of the second conical piston and the bottom surface of the spring current plate;
and a second communication hole for communicating the third chamber with the fourth chamber is formed in the side wall of the second conical piston.
Preferably, the wall surfaces of the fourth sliding hollow grooves at the upper part and the lower part of the second material hole are embedded with a second O-shaped ring for sealing.
Preferably, a second O-ring for sealing is embedded on the outer side wall of the second annular boss.
A drum for a tubular separator with a non-return device comprises a second drum barrel, wherein a second liquid outlet is formed in the top of the second drum barrel, a second bottom shaft cover is arranged at the bottom of the second drum barrel, a second shaft sleeve and a second shaft sleeve pressing cap are arranged at the bottom of the second bottom shaft cover, and a first drum sealing gasket is arranged between the second bottom shaft cover and the bottom of the second drum barrel;
a non-return device is arranged on the second bottom shaft cover;
a second mounting groove is formed in the upper portion of a second bottom material channel of the second bottom shaft cover;
the bottom of the second valve seat is fixedly arranged in a second mounting groove, and a second sealing gasket is arranged between the second valve seat and the second mounting groove; the four tabs are located inside the second drum.
The invention has the beneficial effects that:
when the tubular separator drum rotates to a certain speed, centrifugal hydraulic pressure generated by working liquid in the check device drives the cone piston to move upwards by overcoming the pressure of the spring, so that a material hole in the valve seat is communicated with a material channel at the bottom of the bottom shaft cover, and materials enter a drum barrel at the upper part of the bottom shaft cover through the material channel at the bottom and the material hole to be centrifugally separated; when the rotating speed of the rotary drum is reduced to a certain value until the rotary drum stops, centrifugal hydraulic pressure generated by working liquid in the non-return device is not enough to overcome the pressure of the spring, so that the cone piston slides downwards to close the material hole and the material channel at the bottom of the bottom shaft cover, and when the rotary drum stops rotating, a liquid phase in the rotary drum is blocked in the rotary drum barrel, and can be conveniently and sanitarily taken out through a special tool and a special method, so that the loss caused by mixing with lubricating grease in the feeding assembly in the outflow process is avoided.
Drawings
FIG. 1 is a schematic diagram of a prior art tubular separator;
FIG. 2 is a schematic view of an assembly of a prior art liquid inlet assembly;
FIG. 3 is a schematic structural diagram of a drum in the prior art;
FIG. 4(1) is a schematic diagram of the feeding of a rotary drum in the prior art;
FIG. 4(2) is a schematic diagram of the overflow after the drum is stopped in the prior art;
fig. 5 is an assembly view of a check device in embodiment 1 of the present invention;
fig. 6(1) is a schematic structural view of a material hole of a non-return device in embodiment 1 of the present invention when the material hole is closed;
fig. 6(2) is a schematic structural view of the check device according to embodiment 1 of the present invention when the material hole is opened;
FIG. 7 is a schematic view of the structure of the check device assembled with four wings in example 1 of the present invention;
fig. 8 is an assembly view of a check device in embodiment 2 of the present invention;
fig. 9(1) is a schematic structural view of a material hole of a non-return device in embodiment 2 of the present invention when the material hole is closed;
fig. 9(2) is a schematic structural view of the check device according to embodiment 2 of the present invention when the material hole is opened;
FIG. 10(1) is a schematic view showing the construction of a drum for a pipe separator of the present invention having a check device in example 1;
FIG. 10(2) is a schematic structural view of a drum for a pipe separator of the present invention having a check device in example 2;
FIG. 11 is a schematic view of a drum grabber and a tubular separator drum with a backstop device according to the present invention;
FIG. 12 is a schematic view of the assembly of a drum and a drainage groove of a tubular separator with a check device of example 1 according to the present invention;
FIG. 13 is a schematic view of the structure of the feed tube;
wherein,
01-a motor, 02-a speed change mechanism,
03-rotary drum, 031-rotary drum barrel, 032-liquid outlet, 033-bottom shaft cover, 034-sealing gasket, 035-three fins, 036-shaft sleeve and 037-pressing cap;
04-feeding assembly, 041-liquid inlet bearing seat, 042-sliding bearing, 043-spring damping, 044-large pressure cap, 045-feeding nozzle, 046-feeding pipe, 047-oil cup adapter, 048-spiral cover type oil cup, 049-overflow port, 0410-rotating shaft; a-solid, B-liquid, C-dripping greases
05-a frame;
11-first valve seat, 111-first sliding hollow groove, 112-second sliding hollow groove, 113-first material hole, 114-first O-ring; 12-a first cone piston, 121-a first annular boss, 122-a first communication hole, 13-a first press cap, 14-a first core piston, 15-a first spring, 16-a first chamber, 17-a second chamber;
21-a first rotary drum barrel, 22-a first liquid outlet, 23-a first bottom shaft cover, 231-a first bottom material channel, 232-a first installation groove, 24-a first shaft sleeve, 25-a first shaft sleeve pressing cap, 26-a first rotary drum sealing gasket, 27-a first sealing gasket and 28-four fins;
31-second valve seat, 311-third sliding hollow groove, 312-fourth sliding hollow groove, 313-second material hole, 314-second O-ring; 32-second cone piston, 321-second annular boss, 322-second communication hole, 33-spring baffle, 331-air hole, 34-piston baffle, 341-spring retainer, 35-second spring, 36-third chamber, 37-fourth chamber, 38-four wings, 39-wing baffle;
41-a second drum barrel, 42-a second liquid outlet, 43-a second bottom shaft cover, 431-a second bottom material channel, 432-a second installation groove, 44-a second shaft sleeve, 45-a second shaft sleeve pressing cap, 46-a second drum sealing gasket and 47-a second sealing gasket;
51-rotary drum grabbing vehicle, 52-drainage groove, 53-material pipe, 531-strip-shaped hole, 54-guiding spring, 55-mounting seat and 56-guiding sealing gasket.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The invention is further illustrated with reference to the following figures and examples.
Example 1:
as shown in fig. 5, the non-return device comprises a first valve seat 11, a first cone piston 12, a first pressing cap 13, a first core piston 14 and a first spring 15 which are coaxially arranged from bottom to top;
a first sliding hollow groove 111 which penetrates through the upper surface and the lower surface of the first valve seat 11 and is positioned at the upper part and a second sliding hollow groove 112 which is positioned at the lower part are arranged in the first valve seat 11 along the axial direction; the diameter of the first sliding hollow groove 111 is larger than that of the second sliding hollow groove 112; a plurality of first material holes 113 are uniformly formed in the lower part of the side surface of the first valve seat 11 along the circumferential direction; the number of the first material holes 113 is 2-10.
The first conical piston 12 is of a cylindrical structure with a bottom surface blocked, and the bottom surface of the first conical piston 12 is of a conical surface structure, so that the material distribution is uniform; a first annular boss 121 is coaxially arranged on the outer side wall of the first cone piston 12; the outer side wall of the lower part of the first cone piston 12 is in sliding connection with the wall surface of the second sliding hollow groove 112, and the outer side wall of the first annular boss 121 is in sliding connection with the wall surface of the first sliding hollow groove 111; namely, the first cone piston 12 can move up and down along the inner hole of the first valve seat 11;
the first pressing cap 13 is of an annular structure, and the first pressing cap 13 is fixedly connected with the first valve seat 11; wherein the outer wall surface of the first pressure cap 13 is provided with external threads, the inner wall surface of the upper part of the first valve seat 11 is provided with internal threads, and the first pressure cap 13 is in threaded connection with the first valve seat 11; holes are uniformly distributed on the end face of the first pressing cap 13 and are used as wrench holes when threads are screwed;
the upper part of the first core piston 14 is in clearance fit connection with the first valve seat 11 and is pressed and fixed by a first pressing cap 13, and the outer side wall of the middle part of the first core piston 14 is in sliding connection with the inner wall surface of the first cone piston 12; as shown in fig. 6(1) and 6(2), the upper step of the first core piston 14 is in clearance fit connection with the upper groove of the first valve seat 11;
a first spring 15 is arranged between the bottom end surface of the first core piston 14 and the inner bottom surface of the first cone piston 12; as shown in fig. 6(1) and 6(2), a first spring 15 is sleeved between the boss with the minimum diameter at the lower end of the outer surface of the first core piston 14 and the groove with the minimum diameter at the bottom surface of the inner side of the first cone piston 12; when the first cone piston 12 moves upwards, the lower end surface of the upper step of the first core piston 14 is contacted with the end surface of the uppermost part of the first cone piston 12 to form an upper end point of the stroke; when the first conical piston 12 moves downwards, the lower end surface of the radial boss where the first through hole 122 is located contacts with the lower end surface of the first sliding hollow groove 111 as a stroke lower end point; the first core piston 14 is hollow in form to reduce weight;
the middle and upper part of the side wall of the first hollow annular groove 111 of the first valve seat 11 is provided with a plurality of through holes, and the through holes have the following functions: first, it is used as the wrench hole for the screw connection of the first valve seat 11 and the first bottom shaft cover 23; and residual liquid can be well drained or thrown out after shutdown or during cleaning.
A first chamber 16 for containing working fluid is defined by the side wall of the first hollow sliding groove 111, the outer side wall of the first cone piston 12 positioned below the first annular boss 121, the lower surface of the first annular boss 121, and a step surface between the first sliding hollow groove 111 and the second sliding hollow groove 112; the working fluid is typically water;
a second chamber 17 for containing working fluid is defined by the inner side wall of the first cone piston 12, the inner bottom surface of the first cone piston 12 and the outer bottom surface of the first core piston 14; the working fluid is typically water;
a first communication hole 122 for communicating the first chamber 16 and the second chamber 17 is formed in the side wall of the first cone piston 12;
before use, the second chamber 17 is filled with a dose of working fluid (usually water) which is generally not lost during use and therefore does not need to be added repeatedly during later use.
Preferably, the diameter d of the outer side wall of the lower part of the first cone piston 1211Diameter d of the first sliding hollow groove 11112Outside wall diameter d of the middle of the first core piston 1213The following relationship is satisfied between the two components,
d12 2-d11 2＝d13 2
wherein the outer side wall diameter d of the upper part of the first core piston 1213The diameter at which the volume of the second chamber 17 changes;
when the non-return device rotates along with the rotary drum, the first cone piston 12 moves up and down under the action of centrifugal hydraulic pressure of working fluid in the first chamber 16, and because no air hole is formed in the non-return device and is communicated with the atmosphere, in order to prevent the first cone piston 12 from being blocked due to vacuum or air resistance during action, when the first cone piston 12 moves up, the increased volume in the first chamber 16 must be ensured to be equal to the reduced volume of the second chamber 17; as the first cone piston 12 moves down, the decreasing volume in the first chamber 16 equals the increasing volume of the second chamber 17;
at the same time, the change in height of the first chamber 16 and the second chamber 17 is one-to-one, regardless of whether the first cone piston 12 moves up or down;
it is only necessary to ensure that the bottom area of the first chamber 16 is equal to the bottom area of the place where the volume of the second chamber 17 changes,
namely, it is
And then the above formula is obtained.
Preferably, a first sealing O-ring 114 is embedded in the wall surface of the second sliding hollow groove 112 above and below the first material hole 113; when the first cone piston 12 moves downwards, the first cone piston contacts with the first O-shaped ring 114 at the lower end to seal the first material hole 113, and the first material hole 113 is matched and sealed in a radial matching and sealing mode.
Preferably, a first O-ring 114 for sealing is embedded on the outer side wall of the first annular boss 121, so that the working fluid is prevented from running off, and the material is prevented from being polluted by the working fluid.
Preferably, a first O-ring 114 for sealing is embedded on the outer side wall of the lower portion of the first core piston 14, so as to prevent the working fluid from running off and prevent the working fluid from polluting the material.
A drum for a tubular separator with the check device described in embodiment 1, as shown in fig. 10(1), includes a first drum 21, a first liquid outlet 22 is disposed at the top of the first drum 21, a first bottom shaft cover 23 is disposed at the bottom of the first drum 21, a first shaft sleeve 24 and a first shaft sleeve pressure cap 25 are disposed at the bottom of the first bottom shaft cover 23, a first drum gasket 26 is disposed at the bottoms of the first bottom shaft cover 23 and the first drum 21, and four fins 28 are disposed inside the first drum 21;
the first bottom shaft cover 23 is provided with a non-return device;
as shown in fig. 6(1) and 6(2), a first mounting groove 232 is formed in the upper portion of the first bottom material channel 231 of the first bottom shaft cover 23;
the bottom of the first valve seat 11 is fixedly arranged in a first mounting groove 232, and a first sealing gasket 27 is arranged between the first valve seat 11 and the first mounting groove 232; an internal thread is arranged on the side wall of the first mounting groove 232, an external thread is arranged on the side wall of the lower part of the first valve seat 11, and the first valve seat 11 is in threaded connection with the first bottom shaft cover 23;
as shown in fig. 7, the outer wall surface of the first valve seat 11 is fixedly connected to the four fins 28 by welding.
The drum for the tubular separator with the non-return device of example 1 was implemented as follows:
before use, a certain amount of working fluid is injected into the first chamber 16 and the second chamber 17.
The non-return device is fixed in the first bottom shaft cover 23 and rotates synchronously with the rotary drum. The first cone piston 12 is positioned at the lower end by the pressure of the first spring 15, and seals the first material hole 113 in cooperation with the first O-ring 114 at the lower end, as shown in fig. 6 (1).
After the power supply of the tubular separator is started, the rotary drum starts to rotate, working liquid in the second chamber 17 enters the first chamber 16 from the first through hole 122 under the action of centrifugal force, and the working liquid in the first chamber 16 generates centrifugal hydraulic pressure; if the cone piston 12 is moved up, then it must:
Fon the upper part>FLower part
Wherein: fOn the upper part: the centrifugal fluid pressure of the first chamber 16;
Flower part＝F2+F3+F4+F5
F2: the centrifugal liquid pressure of the second chamber 17;
F3: the force of the first spring 15 acting on the first cone piston 12;
F4: the mass of the first cone piston 12;
F5: the friction force of the first O-ring 114 on the first cone piston 12.
FOn the upper partIncreasing with increasing rotational speed, since the diameter of the first chamber 16 is larger than the diameter of the second chamber 17, when rotating to a specific rotational speed, FOn the upper part>FLower partWhen the first cone piston 12 moves upward, the first material hole 113 is opened, and as shown in fig. 6(2), the material can smoothly enter the drum.
When the machine is stopped, feeding is stopped, the power supply is turned off, and the rotary drum is stopped freely due to inertia. When the drum speed drops below this specific speed, FOn the upper part<FLower partThe first cone piston 12 moves downwards to seal the first material hole 113 in cooperation with the first O-ring 114 at the lower end until the rotary drum completely stops, and the material liquid is stored in the rotary drum and cannot flow out along the overflow ports of the first bottom shaft cover 23 and the feeding assembly 04.
Example 2:
as shown in fig. 8, a non-return device includes a second valve seat 31, a second conical piston 32, a spring baffle 33, and a piston baffle 34, which are coaxially arranged from bottom to top;
a third sliding hollow groove 311 located at the upper part and a fourth sliding hollow groove 312 located at the lower part, which penetrate the upper and lower surfaces of the second valve seat 31, are provided in the second valve seat 31 along the axial direction; the diameter of the third sliding hollow groove 311 is greater than the diameter of the fourth sliding hollow groove 312; a plurality of second material holes 313 are uniformly formed in the lower part of the side surface of the second valve seat 31 along the circumferential direction; the number of the second material holes 313 is 2-10.
The second conical piston 32 is of a cylindrical structure with a bottom surface blocked, the bottom surface of the second conical piston 32 is of a conical surface structure, and an inner hole of the second conical piston 32 is of a circular truncated cone structure with a thick upper part and a thin lower part, namely, the inner hole of the second conical piston 32 has a certain taper, so that the working fluid can smoothly enter the third chamber 36; a second annular boss 321 is coaxially arranged on the upper part of the outer side wall of the second conical piston 32; the outer side wall of the lower part of the second conical piston 32 is in sliding connection with the wall surface of the fourth sliding hollow groove 312, and the outer side wall of the second annular boss 321 is in sliding connection with the wall surface of the third sliding hollow groove 311; i.e. the second conical piston 32 can move up and down along the inner bore of the second valve seat 31;
the spring baffle 33 is fixedly arranged at the top of the inner hole of the second conical piston 32 and can be connected through welding, and an air hole 331 is formed in the middle of the spring baffle 33;
a four-wing piece 38 is fixedly arranged on the upper part of the outer side wall of the second valve seat 31, and a wing piece baffle 39 is fixedly arranged on the bottom of the four-wing piece 38;
a second spring 35 is arranged between the spring baffle 33 and the fin baffle 39;
the piston baffle 34 is fixedly arranged at the top of the inner hole of the second valve seat 31; a through hole for the second spring 35 to pass through is formed in the middle of the piston baffle 34; the piston stopper 34 is fixed inside the second valve seat 32 by a spring collar 341, and the piston stopper 34 defines the end of the upward stroke of the second conical piston 32;
a third chamber 36 for containing working fluid is defined by the side wall of the third hollow sliding groove 311, the outer side wall of the second conical piston 32 located below the second annular boss 321, the lower surface of the second annular boss 321, and a step surface between the third sliding hollow groove 311 and the fourth sliding hollow groove 312;
a fourth chamber 37 for containing working fluid is defined by the inner side wall of the second conical piston 32, the inner bottom surface of the second conical piston 32 and the bottom surface of the spring buffer plate 33;
a second communication hole 322 for communicating the third chamber 36 and the fourth chamber 37 is formed in the side wall of the second conical piston 32;
prior to use, a dose of working fluid (typically water) is first injected into the fourth chamber 37 using an injection needle and needle.
Preferably, a second O-ring 314 for sealing is embedded in the wall surface of the fourth sliding hollow groove 312 at the upper part and the lower part of the second material hole 313; when the second cone piston 32 moves downwards, the second cone piston contacts with the second O-shaped ring 314 at the lower end to seal the first material hole 113, and the second material hole 313 is sealed in a radial matching and sealing manner, so that the sealing is reliable, the structure is simple, and the sealing device is suitable for most materials.
Preferably, a second O-ring 314 for sealing is embedded on the outer side wall of the second annular boss 321; the working solution is prevented from running off, and the pollution of the working solution to materials is avoided.
A drum for a tubular separator with the check device described in embodiment 2, as shown in fig. 10(2), includes a second drum 41, a second liquid outlet 42 is provided at the top of the second drum 41, a second bottom shaft cover 43 is provided at the bottom of the second drum 41, a second shaft sleeve 44 and a second shaft sleeve pressure cap 45 are provided at the bottom of the second bottom shaft cover 43, and a first drum gasket 46 is provided at the bottom of the second bottom shaft cover 43 and the second drum 41;
a non-return device is arranged on the second bottom shaft cover 43;
as shown in fig. 9(1) and 9(2), a second mounting groove 432 is provided at the upper part of the second bottom material channel 431 of the second bottom shaft cover 43;
the bottom of the second valve seat 31 is fixedly arranged in the second mounting groove 432, and a second sealing gasket 47 is arranged between the second valve seat 31 and the second mounting groove 432; the side wall of the second mounting groove 432 is provided with an internal thread, the side wall of the lower part of the second valve seat 31 is provided with an external thread, and the second valve seat 31 is in threaded connection with the second bottom shaft cover 43; the four tabs 38 are located inside the second rotating drum 41.
The drum for the tubular separator with the check device in example 2 was implemented as follows:
prior to use, a dose of working fluid (typically water) is first injected into the second chamber 37 using an injection needle and needle.
The non-return device is fixed in the second bottom shaft cover 43 and rotates synchronously with the rotary drum. The second conical piston 32 is positioned at the lower end by the pressure of the second spring 35, and seals the second material hole 313 in cooperation with the second O-ring 314 at the lower end, as shown in fig. 9 (1).
After the power supply of the tubular separator is started, the rotary drum starts to rotate, working liquid in the fourth chamber 37 enters the third chamber 36 through the second communication hole 322 under the action of centrifugal force, and the working liquid in the third chamber 36 generates centrifugal hydraulic pressure; according to the same principle as that of embodiment 1, when the second conical piston 32 moves upward and the second material hole 313 is opened when the drum rotates to a specific rotation speed, the material can smoothly enter the drum as shown in fig. 9 (2). The second conical piston 32 does not rise any further upon contact with the piston stop 34, which is the upper end of travel of the second conical piston 32. The material is tightly adhered to the inner wall of the rotary drum under the action of centrifugal force, so that the center of the rotary drum is hollow, and the fourth chamber 37 is communicated with the atmosphere through the air hole 331 on the spring baffle plate 33.
When the machine is stopped, feeding is stopped, the power supply is turned off, and the rotary drum is stopped freely due to inertia. In the same principle as in example 1, when the rotation speed of the drum drops below the specific rotation speed, the second conical piston 32 descends to cooperate with the second O-ring 314 at the lower end to seal the second material hole 313 until the drum completely stops, and the material liquid will be stored in the drum and will not flow out along the overflow ports of the second bottom shaft cover 43 and the feeding assembly 04.
The drum for a tubular separator having the check device of example 1 or example 2 is described below as an example of a drum for a tubular separator having the check device of example 1, and the method of taking out the material liquid from the drum is not limited to the method described below, but is only one example.
As shown in fig. 11, firstly, the drum is taken down from the frame 05 by using a drum grabbing vehicle 51, the drum grabbing vehicle 51 can be realized by the prior art, and then the material liquid is led out through a material guiding groove 52; as shown in fig. 12, a material pipe 53 is arranged at the upper part of the material guiding groove 52, as shown in fig. 13, a plurality of holes 531 are arranged on the upper wall surface of the material pipe 53 along the circumferential direction, a material guiding spring 54 is sleeved at the lower part of the material pipe 53, the lower end of the material guiding spring 54 contacts the upper surface of the material guiding groove 52, an installation seat 55 is arranged at the upper end of the material guiding spring 54, the material pipe 53 upwards passes through the installation seat 55, and a material guiding sealing gasket 56 is arranged on the inner wall surface of the installation seat 55;
when in use, as shown in fig. 12, the material pipe 53 is inserted upwards into the material channel at the bottom of the first bottom shaft cover 23, and under the gravity of the rotary drum and the elastic force of the material guiding spring 54, the bottom of the first bottom shaft cover 23 falls into the mounting seat 55 and is sealed by the material guiding sealing gasket 56; the material pipe 53 overcomes the elastic force of the material guiding spring 54 upwards to push the first cone piston 12, so that the first cone piston 12 moves upwards, the first material hole 113 is opened, and the material liquid flows into the material guiding groove 52 through the material pipe 53, and clean and pollution-free material liquid is obtained.
In the description of the present invention, it is to be understood that the terms "top," "bottom," "upper," "lower," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the present invention, and it should be understood by those skilled in the art that various modifications and changes may be made without inventive efforts based on the technical solutions of the present invention.
Claims (10)
1. A non-return device is characterized by comprising a first valve seat, a first cone piston, a first spring, a first pressing cap and a first core piston which are coaxially arranged from bottom to top;
a first sliding hollow groove which penetrates through the upper surface and the lower surface of the first valve seat and is positioned at the upper part and a second sliding hollow groove which is positioned at the lower part are arranged in the first valve seat along the axial direction; the diameter of the first sliding hollow groove is larger than that of the second sliding hollow groove; a plurality of first material holes are uniformly formed in the lower part of the side surface of the first valve seat along the circumferential direction;
the first conical piston is of a cylinder structure with a bottom surface blocked, and the bottom surface of the first conical piston is of a conical surface structure; a first annular boss is coaxially arranged on the outer side wall of the first cone piston; the outer side wall of the lower part of the first conical piston is in sliding connection with the wall surface of the second sliding hollow groove, and the outer side wall of the first annular boss is in sliding connection with the wall surface of the first sliding hollow groove;
the first pressing cap is of an annular structure and is fixedly connected with the first valve seat;
the upper part of the first core piston is in clearance fit connection with a first valve seat and is tightly pressed and fixed by a first pressing cap, and the outer side wall of the middle part of the first core piston is in sliding connection with the inner wall surface of a first cone piston;
a first spring is arranged between the bottom end surface of the first core piston and the inner side bottom surface of the first cone piston;
a first cavity for containing working fluid is defined by the side wall of the first hollow sliding groove, the outer side wall of the first cone piston positioned below the first annular boss, the lower surface of the first annular boss and a step surface between the first sliding hollow groove and the second sliding hollow groove;
a second chamber for containing working fluid is defined by the inner side wall of the first cone piston, the inner bottom surface of the first cone piston and the outer bottom surface of the first core piston;
and a first communication hole for communicating the first chamber with the second chamber is formed in the side wall of the first cone piston.
2. The non-return device of claim 1, wherein the diameter of the outer side wall of the lower portion of the first cone piston is larger than the diameter of the outer side wall of the lower portion of the first cone pistond11Diameter d of the first sliding hollow groove12Diameter d of outer side wall in middle of first core piston13The following relationship is satisfied between the two components,
d12 2-d11 2＝d13 2。
3. the non-return device of claim 1, wherein a first sealing O-ring is embedded in each of the walls of the second sliding hollow groove at the upper and lower portions of the first material hole.
4. The non-return device of claim 1, wherein a first sealing O-ring is embedded on the outer side wall of the first annular boss.
5. The non-return device of claim 1, wherein a first O-ring for sealing is embedded on an outer side wall of a lower portion of the first core piston.
6. A rotary drum for a tubular separator comprises a first rotary drum barrel, wherein a first liquid outlet is formed in the top of the first rotary drum barrel, a first bottom shaft cover is arranged at the bottom of the first rotary drum barrel, a first shaft sleeve and a first shaft sleeve pressing cap are arranged at the bottom of the first bottom shaft cover, a first rotary drum sealing gasket is arranged between the first bottom shaft cover and the bottom of the first rotary drum barrel, and four fins are arranged inside the first rotary drum barrel; it is characterized in that the utility model is characterized in that,
the first bottom shaft cover is provided with a non-return device as claimed in any one of claims 1 to 5;
a first mounting groove is formed in the upper portion of a first bottom material channel of the first bottom shaft cover;
the bottom of the first valve seat is fixedly arranged in a first mounting groove, and a first sealing gasket is arranged between the first valve seat and the first mounting groove;
the outer wall surface of the first valve seat is fixedly connected with the four wings.
7. A non-return device is characterized by comprising a second valve seat, a second conical piston, a spring baffle and a piston baffle which are coaxially arranged from bottom to top;
a third sliding hollow groove which penetrates through the upper surface and the lower surface of the second valve seat and is positioned at the upper part and a fourth sliding hollow groove which is positioned at the lower part are arranged in the second valve seat along the axial direction; the diameter of the third sliding hollow groove is larger than that of the fourth sliding hollow groove; a plurality of second material holes are uniformly formed in the lower part of the side surface of the second valve seat along the circumferential direction;
the second conical piston is of a cylinder structure with a blocked bottom surface, the bottom surface of the second conical piston is of a conical surface structure, and an inner hole of the second conical piston is of a circular truncated cone structure with a thick upper part and a thin lower part; a second annular boss is coaxially arranged at the upper part of the outer side wall of the second conical piston; the outer side wall of the lower part of the second conical piston is in sliding connection with the wall surface of the fourth sliding hollow groove, and the outer side wall of the second annular boss is in sliding connection with the wall surface of the third sliding hollow groove;
the spring baffle is fixedly arranged at the top of the inner hole of the second conical piston, and an air hole is formed in the middle of the spring baffle;
the upper part of the outer side wall of the second valve seat is fixedly provided with four wings, and the bottoms of the four wings are fixedly provided with wing baffle plates;
a second spring is arranged between the spring baffle and the wing baffle;
the piston baffle is fixedly arranged at the top of the inner hole of the second valve seat; the middle part of the piston baffle is provided with a through hole for the second spring to pass through;
a third cavity for containing working fluid is defined by the side wall of the third hollow sliding groove, the outer side wall of the second conical piston positioned below the second annular boss, the lower surface of the second annular boss and a step surface between the third sliding hollow groove and the fourth sliding hollow groove;
a fourth chamber for containing working fluid is defined by the inner side wall of the second conical piston, the inner bottom surface of the second conical piston and the bottom surface of the spring current plate;
and a second communication hole for communicating the third chamber with the fourth chamber is formed in the side wall of the second conical piston.
8. The non-return device of claim 7, wherein a second O-ring for sealing is embedded in the wall surface of the fourth sliding hollow groove at the upper part and the lower part of the second material hole.
9. The non-return device of claim 7, wherein a second O-ring is embedded on the outer side wall of the second annular boss for sealing.
10. A rotary drum for a tubular separator comprises a second rotary drum barrel, wherein a second liquid outlet is formed in the top of the second rotary drum barrel, a second bottom shaft cover is arranged at the bottom of the second rotary drum barrel, a second shaft sleeve and a second shaft sleeve pressing cap are arranged at the bottom of the second bottom shaft cover, and a first rotary drum sealing gasket is arranged between the second bottom shaft cover and the bottom of the second rotary drum barrel; it is characterized in that the utility model is characterized in that,
the second bottom shaft cover is provided with a non-return device as claimed in any one of claims 7 to 9;
a second mounting groove is formed in the upper portion of a second bottom material channel of the second bottom shaft cover;
the bottom of the second valve seat is fixedly arranged in a second mounting groove, and a second sealing gasket is arranged between the second valve seat and the second mounting groove;
the four tabs are located inside the second drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910056670.8A CN109731702B (en) | 2019-01-18 | 2019-01-18 | Non-return device and drum for tubular separator with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910056670.8A CN109731702B (en) | 2019-01-18 | 2019-01-18 | Non-return device and drum for tubular separator with same |
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| Publication Number | Publication Date |
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| CN109731702A CN109731702A (en) | 2019-05-10 |
| CN109731702B true CN109731702B (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910056670.8A Active CN109731702B (en) | 2019-01-18 | 2019-01-18 | Non-return device and drum for tubular separator with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110756340A (en) * | 2019-11-14 | 2020-02-07 | 上海知正离心机有限公司 | Non-return flow-guiding tube type centrifugal machine |
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| US7393317B2 (en) * | 2005-04-11 | 2008-07-01 | Cummins Filtration Ip, Inc. | Centrifuge rotor-detection oil-shutoff device |
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| US3426876A (en) * | 1966-06-24 | 1969-02-11 | Srm Hydromekanik Ab | Modulating valve for hydrostatic coupling |
| DE3134875A1 (en) * | 1981-09-03 | 1983-03-24 | Siegfried 7140 Ludwigsburg Schraivogel | Rotary valve, particularly for centrifuges |
| CN2080604U (en) * | 1990-09-29 | 1991-07-10 | 李立夫 | Static pressure reducing valve |
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| CN109731702A (en) | 2019-05-10 |
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