CN117867672A - Flash evaporation non-woven fabric and spinning pump thereof - Google Patents
Flash evaporation non-woven fabric and spinning pump thereof Download PDFInfo
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- CN117867672A CN117867672A CN202410270406.5A CN202410270406A CN117867672A CN 117867672 A CN117867672 A CN 117867672A CN 202410270406 A CN202410270406 A CN 202410270406A CN 117867672 A CN117867672 A CN 117867672A
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- spinning
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- 238000009987 spinning Methods 0.000 title claims abstract description 62
- 239000004745 nonwoven fabric Substances 0.000 title abstract description 11
- 238000001704 evaporation Methods 0.000 title abstract description 7
- 230000008020 evaporation Effects 0.000 title abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 17
- 239000007924 injection Substances 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims description 43
- 230000006835 compression Effects 0.000 claims description 42
- 230000001105 regulatory effect Effects 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 15
- 239000000243 solution Substances 0.000 claims description 11
- -1 polyethylene Polymers 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 8
- 229920000573 polyethylene Polymers 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000007731 hot pressing Methods 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims 2
- 239000004751 flashspun nonwoven Substances 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000000155 melt Substances 0.000 description 18
- 238000001125 extrusion Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 150000001338 aliphatic hydrocarbons Chemical class 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 150000008282 halocarbons Chemical class 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002576 ketones Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Reciprocating Pumps (AREA)
Abstract
The invention provides a flash evaporation non-woven fabric and a spinning pump thereof, which solve the problems of injection stability and the like of the spinning pump. The invention has the advantages of good injection stability, high production efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of flash spinning, and particularly relates to a flash non-woven fabric and a spinning pump thereof.
Background
The process of continuously, quantitatively and uniformly extruding the spinning fluid from the capillary holes of the spinneret or the spinneret into liquid trickles by using a spinning pump, and solidifying the liquid trickles into filaments in air, water or a coagulating bath is called spinning or fiber forming. When the gear in the selected spinning pump rotates, the suction cavity and the extrusion cavity are enabled to suck and press materials due to the change of the volume of the gear meshing cavity. I.e. one end of the feed hole becomes a negative pressure zone, and the melt is sucked in and filled. Because of the continuous rotation of the gear, the melt or solution is continuously brought to the extrusion cavity to form a high-pressure area, and the melt or solution in the high-pressure area is extruded out of the pump body by the rotation of the gear. However, the existing spinning pump has uneven melt conduction pressure in the feeding process, can not ensure the injection stability in the compression process, and finally affects the fiber forming effect. In addition, the existing spinning pump is single in feeding and discharging ports, so that the production efficiency of the spinning pump is low.
In order to solve the defects existing in the prior art, long-term exploration is performed, and various solutions are proposed. For example, chinese patent literature discloses a multi-outlet spinning metering pump [201410018664.0], it include the pump seat and with pump body of pump seat fixed connection, set up metering device and transmission in the pump body, metering device by transmission drives, the pump body includes bottom plate, at least one pump plate and sets up the baffle between two adjacent pump plates, set up a plurality of feed channels and a plurality of discharge channels on bottom plate, pump plate and the baffle, chemical fiber raw materials is measured and is carried to the discharge channel by the feed channel through metering device, feed channel and discharge channel are the curve passageway respectively.
The problem that the spinning pump feed inlet and discharge outlet is single is solved to a certain extent by the scheme, but the scheme still has a plurality of defects, such as the problem that the stability of melt transmission pressure cannot be guaranteed.
Disclosure of Invention
The invention aims to solve the problems and provide a spinning pump with reasonable design and stable melt supply pressure.
Another object of the present invention is to provide a flash nonwoven fabric having good molding quality, in view of the above problems.
A flash evaporation non-woven fabric is prepared from polyethylene; and dissolving polyethylene in a spinning solvent to obtain a spinning solution, carrying out flash spinning on the spinning solution through a main pump body, then carrying out lapping and hot pressing to obtain the flash-evaporated non-woven fabric.
In the flash evaporation non-woven fabric, the mass fraction of polyethylene in the spinning solution is 8-14%;
in the flash-evaporation non-woven fabric, the spinning solvent is a combination of several of aromatic hydrocarbon, aliphatic hydrocarbon, alicyclic hydrocarbon, unsaturated hydrocarbon, halogenated hydrocarbon, alcohol, ester, ether, ketone, amide and fluorocarbon.
The utility model provides a flash spinning pump, including the main pump body, the internal planetary gear set of main pump and the compression subassembly of linking with planetary gear set, the main pump body has a plurality of feed chambers, feed chamber and compression subassembly intercommunication and be provided with automatic pressure regulating subassembly between, the main pump body is including being cuboid form pump case and the pump core of slip grafting in the pump case, pump case both ends are installed and are connected with pump core confined apron, it has feed hose with feed chamber one-to-one feed inlet and feed inlet to open on the apron of one of them end, it has the discharge gate with compression subassembly intercommunication to open on the apron of the other end, the feed chamber sets up in the pump core and is relative with the apron at feed inlet place, install the reposition of redundant personnel subassembly between the apron at pump core and feed inlet place, install the switching assembly of control adjacent feed chamber and compression subassembly break-make between the apron at pump core and discharge gate place.
In the above-mentioned flash spinning pump, the reposition of redundant personnel subassembly is including being annular reposition of redundant personnel base, opens on the apron and supplies the reposition of redundant personnel base embedded shunt groove, is provided with the reposition of redundant personnel passageway in the reposition of redundant personnel base, and the reposition of redundant personnel base is provided with the restriction subassembly with the feed chamber one-to-one with the opposite side of pump core.
In the above-mentioned flash spinning pump, the main pump body has at least four feeding chambers arranged in a central symmetry and the number of the feeding chambers is an even number.
In the flash spinning pump, the flow limiting assembly comprises a first flow limiting cylinder and a second flow limiting cylinder which are inserted into the feeding cavity, the first flow limiting cylinder and the second flow limiting cylinder are arranged at intervals relative to the flow dividing base, a first channel extending along the axial direction is respectively arranged in the first flow limiting cylinder and the second flow limiting cylinder, second channels which are obliquely arranged relative to the first channel are arranged on two sides of the first channel, and the second channels are communicated with the first channels through a third channel in an arc shape; the second channel in the first flow-limiting cylinder is inclined in the opposite direction to the second channel in the second flow-limiting cylinder.
In the above-mentioned flash spinning pump, the switching assembly is including being the annular switching base, and the pump core is opened with the switching groove that supplies switching base telescopic sliding with the relative one end of apron, and the feed chamber port sets up in switching groove bottom, and switching groove bottom is fixed with relative sealing valve block with switching on the base laminating, leaves the feed channel with compression assembly intercommunication between switching base and the apron, and switching base is equipped with the switching subassembly.
In the flash spinning pump, the opening and closing assembly comprises opening and closing openings arranged on the switching base and the sealing valve plate, the opening and closing openings correspond to the feeding cavities where the first flow limiting cylinders are positioned one by one and are communicated with the feeding channels, valve seats corresponding to the opening and closing openings are fixed on the inner sides of the cover plates, and the end heads of the valve seats extend between the sealing valve plate and the feeding cavities and are fixedly provided with auxiliary valve plates which are attached to and pressed with the sealing valve plate; the switching base is connected with a hydraulic push rod.
In the above-mentioned flash spinning pump, compression subassembly is including setting up the compression chamber in the pump core, and the drive screw of axial extension is installed in the compression chamber rotation, and drive screw both sides symmetrical engagement has driven screw, and drive screw and driven screw are connected with planetary gear set transmission respectively, compression chamber and charge-in channel and discharge gate intercommunication.
In the above-mentioned flash spinning pump, automatic pressure regulating subassembly is equipped with the extrusion chamber of adjacent arrangement including setting up the pressure regulating chamber in feed channel, the extrusion intracavity portion is separated into cavity and lower cavity by the elastic diaphragm, go up the cavity and pass through pressure regulating channel and pressure regulating chamber export intercommunication, the elastic diaphragm is connected with and adjusts the pole and extend to the pressure regulating intracavity, the pressure regulating intracavity portion is separated into preceding cavity and back cavity by the throttle valve port, it is relative and be fixed with the throttle valve piece with the throttle valve port to adjust the pole, be provided with elastic reset piece between regulation pole and the pump core.
In the flash spinning pump, the main pump body is provided with the adapter seat communicated with the discharge port, the adapter seat extends outwards relative to the main pump body and is fixedly provided with the injection seat, and the injection seat is provided with the injection port.
In the flash spinning pump, the outer side of the main pump body is provided with the clamping groove, the clamping block is slidably arranged in the clamping groove and is in threaded connection with the threaded piece pressed against the bottom of the clamping groove, and the clamping block is provided with a plurality of mounting holes.
Compared with the prior art, the invention has the advantages that: the internal pressure of the main pump body is maintained stable by the automatic pressure regulating component, so that the injection stability of the compression component in the spinning pump is ensured; the flow dividing component is matched with the switching component to realize the switching of the internal passage of the flow limiting component, maintain the fluidity of the melt in a cut-off state and prevent the internal melt from being coagulated and blocked; the compression assembly adopts a three-screw structure, and has good compression and exhaust performances.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a cross-sectional view of the structure of the present invention.
Fig. 3 is a partial cross-sectional view of the present invention.
Fig. 4 is another partial cross-sectional view of the present invention.
Fig. 5 is another partial cross-sectional view of the present invention.
Fig. 6 is a partial schematic view of the present invention.
Fig. 7 is a schematic diagram of a first embodiment of the present invention.
Fig. 8 is a schematic diagram of a second embodiment of the present invention.
In the drawing, a main pump body 1, a pump housing 11, a pump core 12, a cover plate 13, a feed port 14, a discharge port 15, a planetary gear set 2, a compression assembly 3, a compression chamber 31, a driving screw 32, a driven screw 33, a feed chamber 4, an automatic pressure regulating assembly 5, a pressure regulating chamber 51, a pressing chamber 52, an elastic diaphragm 53, an upper chamber 54, a lower chamber 55, a pressure regulating passage 56, an adjusting lever 57, a throttle valve port 58, a front chamber 581, a rear chamber 582, a throttle block 59, a split assembly 6, a split base 61, a split groove 62, a split passage 63, a first flow limiting cylinder 64, a second flow limiting cylinder 65, a first passage 66, a second passage 67, a third passage 68, a switching assembly 7, a switching base 71, a switching groove 72, a seal valve plate 73, a feed passage 74, a closing opening 75, a valve seat 76, a sub valve plate 77, a hydraulic push rod 78, a adapter 8, an injection seat 81, an injection port 82, a clamping groove 9, and a clamping block 91.
Detailed Description
The invention will be described in further detail with reference to the drawings and the detailed description.
As shown in figures 1-8, the flash spinning pump comprises a main pump body 1 made of stainless steel, wherein a planetary speed change gear set 2 and a compression assembly 3 linked with the planetary speed change gear set 2 are arranged in the main pump body 1, and the planetary speed change gear set 2 is externally connected with a servo motor to provide driving torque. Different from conventional pump body structure, the main pump body 1 has a plurality of feeding chambers 4 in this application and makes things convenient for multichannel feeding, both can satisfy single feeding demand also can satisfy compound feeding demand, further mixes by inside compression subassembly 3, because there is the volatility in feeding pressure, consequently feeding chamber 4 and compression subassembly 3 intercommunication and be provided with automatic pressure regulating assembly 5 between and maintain the fuse-element pressure stability in the compression subassembly 3, guarantees fibre shaping quality.
For convenient disassembly and maintenance, the main pump body 1 comprises a cuboid pump shell 11 and a pump core 12 which is inserted into the pump shell 11 in a sliding way, cover plates 13 which seal the pump core 12 are arranged at two ends of the pump shell 11, and joint parts of the cover plates are bonded and sealed. Wherein, open on the apron 13 of one end have a plurality of and feed cavity 4 one-to-one's feed inlet 14 and feed inlet 14 external connection have the feed hose, open on the other end apron 13 have with compression assembly 3 intercommunication's discharge gate 15, feed cavity 4 set up in pump core 12 and with the apron 13 at feed inlet 14 place relatively, open apron 13 can maintain feed cavity 4 inside. A shunt component 6 is arranged between the pump core 12 and the cover plate 13 where the feed inlet 14 is positioned, and a switching component 7 for controlling the on-off of the adjacent feed cavity 4 and the compression component 3 is arranged between the pump core 12 and the cover plate 13 where the discharge outlet 15 is positioned. The melt enters the feed cavities 4 from the feed openings 14 and is evenly distributed into the individual feed cavities 4 by the distribution assembly 6.
Specifically, the flow dividing assembly 6 includes a circular flow dividing base 61, a flow dividing groove 62 for embedding the flow dividing base 61 is formed in the cover plate 13, a flow dividing channel 63 communicated with the feed inlet 14 is arranged in the flow dividing base 61, and a flow limiting assembly corresponding to the feed cavities 4 one by one is arranged on the side, opposite to the pump core 12, of the flow dividing base 61. The flow direction of the melt inside the feed chamber 4 is restricted by the flow restriction assembly while the flow direction is switched by the switching assembly 7.
In depth, the main pump body 1 has at least four feed chambers 4 arranged in central symmetry and the number of feed chambers 4 is even. The feed chambers 4 and the flow restriction assemblies therein are arranged in pairs, each pair of flow restriction assemblies and feed chambers 4 forming a relatively independent loop.
Further, the flow limiting assembly comprises a first flow limiting cylinder 64 and a second flow limiting cylinder 65 which are inserted into the feeding cavity 4, the first flow limiting cylinder 64 and the second flow limiting cylinder 65 are arranged at intervals relative to the flow dividing base 61, a first channel 66 extending along the axial direction is respectively arranged in the first flow limiting cylinder 64 and the second flow limiting cylinder 65, second channels 67 which are obliquely arranged relative to the first channels 66 are formed in two sides of the first channels 66, and the second channels 67 are communicated with the first channels 66 through a third channel 68 in an arc shape; the second channel 67 in the first flow restrictor 64 is inclined in a direction opposite to the direction of inclination of the second channel 67 in the second flow restrictor 65. When the feed port 14 is fed, the melt enters the first flow-limiting cylinder 64 and flows along the first channel 66, wherein the loop formed by the second channel 67 and the third channel 68 does not influence the flow of the melt and plays a role in acceleration, and when the melt enters the second flow-limiting cylinder 65, the backflow generated by the second channel 67 and the third channel 68 plays a role in blocking the flow of the melt flowing in the first channel 66, and in this state, the second flow-limiting cylinder 65 plays a role in a one-way valve.
Further, the switching assembly 7 is disposed at an end of the feeding chamber 4 far away from the splitting assembly 6, and includes a circular switching base 71, and a switching groove 72 for sliding the switching base 71 in a telescopic manner is opened at an end of the pump core 12 opposite to the cover 13, and the switching groove 72 is connected in parallel with each feeding chamber 4. The feed chamber 4 port is disposed at the bottom of the switching trough 72 and the switching base 71 is kept isolated from the bottom of the switching trough 72. The bottom of the switching groove 72 and the switching base 71 are fixedly attached with opposite sealing valve plates 73, a feeding channel 74 communicated with the compression assembly 3 is reserved between the switching base 71 and the cover plate 13, and the switching base 71 is provided with an opening and closing assembly. The switching assembly pushes the switching base 71 to control the on-off of the feeding channel 74 and the feeding cavity 4.
Besides, the opening and closing assembly comprises opening and closing openings 75 arranged on the switching base 71 and the sealing valve plate 73, the opening and closing openings 75 are in one-to-one correspondence with the feeding cavities 4 where the first flow limiting cylinders 64 are positioned and are communicated with the feeding channels 74, valve seats 76 corresponding to the opening and closing openings 75 are fixed on the inner side of the cover plate 13, and the ends of the valve seats 76 extend between the sealing valve plate 73 and the feeding cavities 4 and are fixedly provided with auxiliary valve plates 77 which are adhered and pressed with the sealing valve plate 73; the switching base 71 is connected with a hydraulic ram 78.
Example 1
In this embodiment, the hydraulic push rod 78 pushes the switching base 71 to make the auxiliary valve plate 77 adhere to and compress the sealing valve plate 73 on the switching base 71, so as to seal the opening and closing opening 75, and the feeding channel 74 is kept isolated from the feeding cavity 4 at this time. In this state, the melt enters the first flow restriction 64 and is accelerated to be transferred into the second flow restriction 65, and the first flow restriction 64 and the second flow restriction 65 arranged in pairs remain in a circulating reflux state.
Example two
In this embodiment, the hydraulic push rod 78 pushes the switching base 71 to separate the auxiliary valve plate 77 from the sealing valve plate 73 on the switching base 71, the opening and closing opening 75 is in an opened state at this time, the melt enters the first flow-limiting cylinder 64 and is accelerated to be transferred to the feeding channel 74, the opposite opening and closing opening 75 of the second flow-limiting cylinder 65 is kept closed, and the melt is continuously introduced into the first flow-limiting cylinder 64 and is transferred to the feeding channel 74 due to the function of the check valve of the second flow-limiting cylinder 65.
Meanwhile, the compression assembly 3 is arranged adjacent to the above-mentioned diversion assembly 6, heat is normally conducted to prevent internal melt from condensing, the compression assembly specifically comprises a compression cavity 31 arranged in the pump core 12, a driving screw 32 extending along the axial direction is rotatably arranged in the compression cavity 31, driven screws 33 are symmetrically meshed with two sides of the driving screw 32, the driving screw 32 and the driven screws 33 are respectively in transmission connection with the planetary gear set 2, and the compression cavity 31 is communicated with the feed channel 74 and the discharge port 15. The melt enters the compression chamber 31 through the feed channel 74 and is guided out of the discharge opening 15 under the pressing torque of the driven screw 33 and the drive screw 32.
Visibly, each feeding channel 74 is provided with an independent automatic pressure regulating assembly 5, comprising a pressure regulating cavity 51 arranged in the feeding channel 74, the pressure regulating cavity 51 is provided with a disc-shaped extrusion cavity 52 which is adjacently arranged, the interior of the extrusion cavity 52 is divided into an upper cavity 54 and a lower cavity 55 by an elastic membrane 53, the upper cavity 54 is communicated with the outlet of the pressure regulating cavity 51 through a pressure regulating channel 56, the elastic membrane 53 is connected with an adjusting rod 57, the adjusting rod 57 extends into the pressure regulating cavity 51, the interior of the pressure regulating cavity 51 is divided into a front cavity 581 and a rear cavity 582 by a throttle valve port 58, the adjusting rod 57 is opposite to the throttle valve port 58 and is fixedly provided with a throttle valve block 59, and an elastic reset piece is arranged between the adjusting rod 57 and the pump core 12. While the melt enters the pressure regulating cavity 51 from the feeding channel 74, part of the melt enters the upper cavity 54 through the pressure regulating channel 56, and when the pressure is excessive, the elastic diaphragm 53 is pressed and pushes the regulating rod 57, and the channel caliber between the throttle valve block 59 and the throttle valve port 58 is reduced, so that the flow rate is reduced. However, when the pressure is too small, the elastic diaphragm 53 rebounds and pulls the adjusting rod 57, the passage diameter between the throttle block 59 and the throttle port 58 increases to increase the flow rate, and the negative feedback adjusting mechanism maintains the internal feed amount of the compression assembly 3 within a constant range.
Obviously, the melt is collected at the discharge hole 15 after being led out from the compression assembly 3, the main pump body 1 is provided with an adapter seat 8 communicated with the discharge hole 15, the adapter seat 8 extends outwards relative to the main pump body 1 and is fixedly provided with an injection seat 81, and the injection seat 81 is provided with injection ports 82. The adapter 8 with different specifications is selected according to actual needs, so that different fibers are sprayed. In addition, the adapter 8 can be separated and connected with the discharge port 15 through an extension pipe, so that different flash spinning mechanisms can be adapted.
Preferably, for convenient assembly and fixation and adjustment of the orientation of the discharge port 15, the outer side of the main pump body 1 is provided with a clamping groove 9, a clamping block 91 is slidably mounted in the clamping groove 9, the clamping block 91 is in threaded connection with a threaded member pressing against the bottom of the clamping groove 9, and a plurality of mounting holes are formed in the clamping block 91. The position of the clamping block 91 relative to the clamping groove 9 can be adjusted, and after the clamping block 91 is clamped and fixed by the screw, other screw can be connected and fixed by the mounting holes on the surface of the clamping block 91, so that the overall direction of the main pump body 1 is adjusted.
A flash evaporation non-woven fabric is prepared from polyethylene; and dissolving polyethylene in a spinning solvent to obtain a spinning solution, carrying out flash spinning on the spinning solution through a main pump body 1, then carrying out lapping and hot pressing to obtain the flash-evaporated non-woven fabric.
Wherein the mass fraction of polyethylene in the spinning solution is 8-14%;
the spinning solvent is a combination of several of aromatic hydrocarbons, aliphatic hydrocarbons, alicyclic hydrocarbons, unsaturated hydrocarbons, halogenated hydrocarbons, alcohols, esters, ethers, ketones, amides and fluorocarbons.
In summary, the principle of this embodiment is as follows: the flow distribution assembly 6 and the switching assembly 7 are matched to control the internal loop of the switching assembly 7, and the flow limiting assembly and the automatic pressure regulating assembly 5 are utilized to adjust the melt feeding amount of the compression assembly 3, so that the discharging stability of the main pump body 1 is ensured.
Although terms such as the main pump body 1, the pump housing 11, the pump core 12, the cover plate 13, the feed port 14, the discharge port 15, the planetary gear set 2, the compression assembly 3, the compression chamber 31, the driving screw 32, the driven screw 33, the feed chamber 4, the automatic pressure adjusting assembly 5, the pressure adjusting chamber 51, the pressing chamber 52, the elastic diaphragm 53, the upper chamber 54, the lower chamber 55, the pressure adjusting passage 56, the adjusting lever 57, the throttle valve port 58, the front chamber 581, the rear chamber 582, the throttle block 59, the split assembly 6, the split base 61, the split groove 62, the split passage 63, the first restriction cylinder 64, the second restriction cylinder 65, the first passage 66, the second passage 67, the third passage 68, the switching assembly 7, the switching base 71, the switching groove 72, the seal 73, the feed passage 74, the opening and closing opening 75, the valve seat 76, the sub-valve plate 77, the hydraulic push rod 78, the switching seat 8, the injection seat 81, the injection port 82, the clamping groove 9, the clamping block 91, and the like are used more herein, the possibility of using other terms is not excluded. These terms are used merely for convenience in describing and explaining the nature of the invention; they are to be interpreted as any additional limitation that is not inconsistent with the spirit of the present invention.
Claims (10)
1. The spinning pump for flash spinning comprises a main pump body (1), wherein a planetary gear set (2) and a compression assembly (3) which is linked with the planetary gear set (2) are arranged in the main pump body (1), the spinning pump is characterized in that the main pump body (1) is provided with a plurality of feeding cavities (4), the feeding cavities (4) are communicated with the compression assembly (3) and are provided with an automatic pressure regulating assembly (5) between the feeding cavities and the compression assembly, the main pump body (1) comprises a pump shell (11) which is in a cuboid shape and a pump core (12) which is slidably inserted in the pump shell (11), cover plates (13) which are used for sealing the pump core (12) are arranged at two ends of the pump shell (11), a plurality of feeding inlets (14) which are in one-to-one correspondence with the feeding cavities (4) are arranged on one end cover plates (13), the feeding inlets (14) are connected with feeding hoses, discharging inlets (15) which are communicated with the compression assembly (3) are arranged on the other end cover plates (13), the feeding cavities (4) are arranged in the pump core (12) and are in a state of being opposite to the cover plates (13) of the pump core (12), a switching component (7) for controlling the on-off of the adjacent feeding cavity (4) and the compression component (3) is arranged between the pump core (12) and the cover plate (13) where the discharge port (15) is positioned.
2. The spinning pump for flash spinning according to claim 1, wherein the flow dividing assembly (6) comprises a circular flow dividing base (61), a flow dividing groove (62) for embedding the flow dividing base (61) is formed in the cover plate (13), a flow dividing channel (63) is formed in the flow dividing base (61), and flow limiting assemblies in one-to-one correspondence with the feeding cavities (4) are arranged on one side, opposite to the pump core (12), of the flow dividing base (61).
3. A flash spinning pump according to claim 2, wherein the main pump body (1) has at least four feeding chambers (4) arranged in a central symmetry and the number of feeding chambers (4) is even.
4. A flash spinning pump according to claim 2, wherein the flow limiting assembly comprises a first flow limiting barrel (64) and a second flow limiting barrel (65) which are inserted into the feeding cavity (4), the first flow limiting barrel (64) and the second flow limiting barrel (65) are arranged at intervals relative to the flow dividing base (61), first channels (66) extending along the axial direction are respectively arranged in the first flow limiting barrel (64) and the second flow limiting barrel (65), second channels (67) which are obliquely arranged relative to the first channels (66) are formed in two sides of the first channels (66), and the second channels (67) are communicated with the first channels (66) through third channels (68) which are arc-shaped; the inclination direction of the second channel (67) in the first flow limiting barrel (64) is opposite to the inclination direction of the second channel (67) in the second flow limiting barrel (65).
5. The spinning pump for flash spinning according to claim 4, wherein the switching assembly (7) comprises a circular switching base (71), a switching groove (72) for the switching base (71) to slide in a telescopic manner is formed in one end, opposite to the cover plate (13), of the pump core (12), a port of the feeding cavity (4) is arranged at the bottom of the switching groove (72), opposite sealing valve plates (73) are fixedly attached to the bottom of the switching groove (72) and the switching base (71), a feeding channel (74) communicated with the compression assembly (3) is reserved between the switching base (71) and the cover plate (13), and the switching base (71) is provided with an opening and closing assembly.
6. The spinning pump for flash spinning according to claim 5, wherein the opening and closing assembly comprises opening and closing openings (75) arranged on the switching base (71) and the sealing valve plate (73), the opening and closing openings (75) are in one-to-one correspondence with the feeding cavities (4) where the first flow limiting cylinders (64) are positioned and are communicated with the feeding channels (74), valve seats (76) corresponding to the opening and closing openings (75) are fixed on the inner side of the cover plate (13), and the ends of the valve seats (76) extend to the positions between the sealing valve plate (73) and the feeding cavities (4) and are fixedly provided with auxiliary valve plates (77) which are jointed and pressed with the sealing valve plate (73); the switching base (71) is connected with a hydraulic push rod (78).
7. The spinning pump according to claim 5, wherein the compression assembly (3) comprises a compression cavity (31) arranged in the pump core (12), a driving screw (32) extending along the axial direction is rotatably arranged in the compression cavity (31), driven screws (33) are symmetrically meshed with two sides of the driving screw (32), the driving screw (32) and the driven screws (33) are respectively in transmission connection with the planetary gear set (2), and the compression cavity (31) is communicated with the feeding channel (74) and the discharging port (15).
8. The spinning pump according to claim 7, wherein the automatic pressure regulating assembly (5) comprises a pressure regulating cavity (51) arranged in a feeding channel (74), the pressure regulating cavity (51) is provided with a pressing cavity (52) which is adjacently arranged, the inside of the pressing cavity (52) is divided into an upper cavity (54) and a lower cavity (55) by an elastic membrane (53), the upper cavity (54) is communicated with the outlet of the pressure regulating cavity (51) through a pressure regulating channel (56), the elastic membrane (53) is connected with an adjusting rod (57) and the adjusting rod (57) extends into the pressure regulating cavity (51), the inside of the pressure regulating cavity (51) is divided into a front cavity (581) and a rear cavity (582) by a throttle valve port (58), the adjusting rod (57) is opposite to the throttle valve port (58) and is fixedly provided with a throttle valve block (59), and an elastic reset piece is arranged between the adjusting rod (57) and the pump core (12).
9. The spinning pump for flash spinning according to claim 1, wherein the main pump body (1) is provided with an adapter seat (8) communicated with the discharge port (15), the adapter seat (8) extends outwards relative to the main pump body (1) and is fixedly provided with an injection seat (81), and injection ports (82) are distributed on the injection seat (81); the main pump body (1) outside open and to have clamping groove (9), clamping groove (9) sliding fit have clamping block (91) just clamping block (91) threaded connection have with clamping groove (9) bottom roof pressure's screw member, clamping block (91) on open and to have a plurality of mounting holes.
10. A flash-spun nonwoven fabric using the spinning pump for flash spinning according to any one of the preceding claims 1 to 9, characterized in that the raw material is polyethylene; and (3) dissolving polyethylene in a spinning solvent to obtain spinning solution, carrying out flash spinning on the spinning solution through a main pump body (1), then carrying out lapping, and carrying out hot pressing to obtain the flash-spun non-woven fabric.
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| CN202410270406.5A CN117867672A (en) | 2024-03-11 | 2024-03-11 | Flash evaporation non-woven fabric and spinning pump thereof |
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| CN202410270406.5A CN117867672A (en) | 2024-03-11 | 2024-03-11 | Flash evaporation non-woven fabric and spinning pump thereof |
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