PVA aging machine

Abstract

The present invention relates to the field of aging equipment, and discloses a PVA aging machine, which includes a heat-conducting case with an inlet for adding additives and an outlet at one end, and a tracing mechanism installed in the heat-conducting case for heating the heat-conducting case and heating materials through the heat-conducting case. By installing the tracing mechanism, the aging machine according to the present invention can effectively control the temperature of the alcoholysis reaction, and by installing multiple inlets, different additives can be added according to actual market demand, and the molar ratio of alkali added during alcoholysis, the concentration of styrene acetate-methanol solution and the water content can be adjusted, so that the polyvinyl alcohol products produced by the conventional alcoholysis setting can be reprocessed by the PVA aging machine according to the present invention to realize the production of polyvinyl alcohol products with different specifications. By installing the PVA aging machine according to the present invention, the production of polyvinyl alcohol products with multiple specifications can be realized.

Description

Technical Field

[0001] The present invention relates to the field of aging devices, and particularly to a PVA aging machine.

Background Art

[0002] Polyvinyl alcohol is abbreviated as PVA (polyvinyl alcohol). Since "vinyl alcohol" is easily isomerized to acetaldehyde, polyvinyl alcohol cannot be produced by polymerizing the theoretically monomer "vinyl alcohol", and can only be produced by alcoholysis or hydrolysis reaction of polyvinyl acetate. Polyvinyl alcohol produced by the alcoholysis method is easy to purify, has high purity, and the performance of the main product is excellent. Therefore, it is common in industry to produce polyvinyl alcohol by the alcoholysis method.

[0003] Currently, when producing polyvinyl alcohol by the alcoholysis method, it is restricted by the structural characteristics of alcoholysis devices such as belt-type alcoholysis devices and crushers. In order to smoothly proceed with the production process and stabilize the alcoholysis degree and polymerization degree, which are important indicators of product performance, the reaction temperature of alcoholysis, the molar ratio of alkali added during alcoholysis, the concentration of styrene acetate methanol solution, and the water content can only be adjusted to the corresponding specified values. Therefore, the conventional alcoholysis device can only produce one standard of polyvinyl alcohol, which is not new in the consumer market and lacks competitiveness. Therefore, how to produce multiple standards of polyvinyl alcohol has become an urgent issue to be solved by those skilled in the art.

Summary of the Invention

Problems to be Solved by the Invention

[0004] To solve the above technical problems, the present invention provides a PVA aging machine, and by reprocessing polyvinyl alcohol products manufactured with a conventional alcoholysis setting with the PVA aging machine according to the present invention, it is possible to realize the production of polyvinyl alcohol with different specifications.

Means for Solving the Problems

[0005] To achieve the above object, the present invention provides the following aspects.

[0006] The present invention is a PVA aging machine, a heat-conducting case in which a plurality of inlets for adding additives are installed and an outlet is installed at one end, a rotating shaft, and an agitation and conveyance mechanism including a spiral blade provided spirally on the rotating shaft along the length direction of the rotating shaft, wherein both ends of the rotating shaft extend through both ends of the heat-conducting case, and the spiral blade is used to agitate the material installed inside the heat-conducting case and convey the material to the outlet, a base, where one base is installed at each of both ends of the rotating shaft, and both ends of the rotating shaft are rotatably supported by the two bases respectively, a power device connected to the rotating shaft so as to rotationally drive the rotating shaft, and a tracing mechanism installed in the heat-conducting case for heating the heat-conducting case and heating the material through the heat-conducting case, to provide a PVA aging machine.

[0007] Preferably, a relief flap is installed at the outlet.

[0008] Preferably, the PVA aging machine further includes a discharge mechanism, the discharge mechanism includes a discharge plate and a link, a discharge port is installed in the relief flap, the link is connected to the discharge plate, and the discharge plate is used to open and close the discharge port.

[0009] Preferably, the PVA aging machine further includes a handle, a positioning sleeve, and a locking sleeve. One end of the link is connected to the discharge plate, the other end of the link extends through the heat conduction case, the locking sleeve is provided on the link, and the locking sleeve is fixed to the heat conduction case. One end of the positioning sleeve penetrates through the locking sleeve and is positioned via a restricting structure. The handle is covered outside the other end of the positioning sleeve and is fixedly connected to the positioning sleeve. The other end of the link penetrates through the positioning sleeve and is threadedly connected to the positioning sleeve.

[0010] Preferably, the PVA aging machine further includes two sealing components. The two sealing components are symmetrically installed at both ends of the heat conduction case. Openings for the rotating shaft to penetrate are installed at both ends of the heat conduction case respectively. The two sealing components correspond one-to-one to the two openings, and the sealing components are used to seal the gap between the side wall of the corresponding opening and the rotating shaft.

[0011] Preferably, the seal component includes a first seal sleeve, a second seal sleeve, and a distribution hole ring. The first seal sleeve is installed in the corresponding opening, the rotating shaft penetrates the first seal sleeve, and two seal tooth components are installed on the inner peripheral wall of the first seal sleeve along the axial direction of the first seal sleeve. The seal tooth component includes a plurality of annular teeth arranged in parallel along the axial direction of the first seal sleeve, and a labyrinth cavity is formed between any two adjacent annular teeth. The interior of the first seal sleeve communicates with the discharge port, and the communication position between the first seal sleeve and the discharge port is located between the two seal tooth components. The second seal sleeve is installed at the end of the first seal sleeve away from the heat conduction case and is connected to the first seal sleeve. The second seal sleeve covers the rotating shaft, and a filler seal chamber is installed on the inner peripheral wall of the second seal sleeve. A plurality of filler seal rings are installed in parallel in the filler seal chamber along the axial direction of the second seal sleeve, and each filler seal ring covers the rotating shaft. A seal groove is further installed on the inner peripheral wall of the end of the second seal sleeve close to the first seal sleeve, and a lip seal ring is installed in the seal groove. The distribution hole ring is installed between two adjacent filler seal rings among the plurality of filler seal rings. The distribution hole ring covers the rotating shaft, and a plurality of intake holes are installed on the circumferential side wall of the distribution hole ring. A plurality of first exhaust holes installed along the circumferential direction of the distribution hole ring and a plurality of second exhaust holes installed along the circumferential direction of the distribution hole ring are installed at both ends of the distribution hole ring respectively. The intake holes correspond one-to-one to both the first exhaust holes and the second exhaust holes, the intake holes communicate with the inert gas, and the intake holes communicate with both the corresponding first exhaust holes and the second exhaust holes.

[0012] Preferably, the trace mechanism is a trace jacket, and a heat exchange medium is installed inside the trace jacket.

[0013] Preferably, the stirring and conveying mechanism further includes stirring rakes installed in sequence along the axial direction of the rotating shaft, the stirring rakes include stirring blades uniformly installed along the circumferential direction of the plurality of rotating shafts, and each of the stirring blades is fixedly connected to the rotating shaft.

[0014] Preferably, the rotating shaft includes a driving shaft and a driven shaft installed coaxially, one end of the driving shaft is transmission-connected to one end of the driven shaft, the other ends of the driving shaft and the driven shaft respectively extend through both ends of the heat conduction case, and are respectively rotatably supported by the two bases, the number of the power devices and the stirring and conveying mechanisms are both two, the two stirring and conveying mechanisms are installed in parallel, and the two power devices are respectively used to rotationally drive the two rotating shafts.

[0015] The power device includes a motor, a reducer, and a manual transmission that are connected in sequence by transmission, and the output end of the manual transmission is transmission-connected to the rotating shaft.

Advantages of the Invention

[0016] The present invention can obtain the following technical effects compared with the prior art.

[0017] The PVA aging machine according to the present invention includes a heat conduction case with an inlet for adding an additive and an outlet at one end, a rotating shaft, and a stirring and conveying mechanism including spiral blades spirally provided on the rotating shaft along the length direction of the rotating shaft, wherein both ends of the rotating shaft respectively extend through both ends of the heat conduction case, and the spiral blades are used to stir the material installed inside the heat conduction case and convey the material to the outlet, a base with one base installed at each of both ends of the rotating shaft, and both ends of the rotating shaft are respectively rotatably supported by the two bases, a power device connected to the rotating shaft to rotationally drive the rotating shaft, and a tracing mechanism installed on the heat conduction case to heat the heat conduction case and heat the material through the heat conduction case.

[0018] Conventional alcohol addition decomposition devices include a belt-type alcohol addition decomposition device, a crusher, and a centrifugal dehydrator. The belt-type alcohol addition decomposition device and the crusher are used to process polyvinyl alcohol products of a certain fixed standard, and the centrifugal dehydrator is used to put the processed polyvinyl alcohol products into dehydration and drying. In specific use, the PVA aging machine according to the present invention is installed after the crusher and before the centrifugal dehydrator. The polyvinyl alcohol products processed by the belt-type alcohol addition decomposition device and the crusher are transported to the aging machine according to the present invention. After re-alcohol addition decomposition by the aging machine according to the present invention, they are transported to the centrifugal dehydrator for dehydration and drying. By installing a plurality of inlets, different additives can be added into the heat conduction case of the PVA aging machine according to the present invention according to the actual market demand. Furthermore, the molar ratio of the alkali added during alcohol addition decomposition, the concentration of the styrene acetate methanol solution, and the water content can be adjusted. By installing a trace mechanism, the reaction temperature of alcohol addition decomposition can be adjusted. In this way, the production of polyvinyl alcohol products of multiple specifications can be realized by the PVA aging machine according to the present invention.

Brief Description of the Drawings

[0019] To more clearly explain the technical solutions in the embodiments of the present invention or the prior art, the drawings required to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without creative labor.

Figure 1

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Figure 5

Embodiments for Carrying Out the Invention

[0020] The object of the present invention is to provide an aging machine capable of realizing the production of polyvinyl alcohol products of multiple specifications.

[0021] In order to make the above objects, features, and advantages of the present invention clearer and easier to understand, the present invention will be described in more detail below by combining the accompanying drawings and specific embodiments.

[0022] Referring to FIGS. 1-5, the PVA aging machine 100 according to this embodiment includes a heat-conducting case 1 with an inlet 101 for adding additives installed thereon and an outlet installed at one end, a rotating shaft 2, and a spiral blade 3 provided spirally on the rotating shaft 2 along the length direction of the rotating shaft 2. The stirring and conveying mechanism is such that both ends of the rotating shaft 2 extend through both ends of the heat-conducting case 1 respectively, and the spiral blade 3 is used to stir the material installed inside the heat-conducting case 1 and convey the material to the outlet. It also includes a base 5 with one base 5 installed at each of both ends of the rotating shaft 2, and both ends of the rotating shaft 2 are rotatably supported by the two bases 5 respectively, a power device 6 connected to the rotating shaft 2 to rotationally drive the rotating shaft 2, and a tracing mechanism 7 installed on the heat-conducting case 1 to heat the heat-conducting case 1 and heat the material through the heat-conducting case 1.

[0023] Conventional alcoholysis devices include a belt-type alcoholysis device, a crusher, and a centrifugal dehydrator. The belt-type alcoholysis device and the crusher are used to process polyvinyl alcohol products of a certain fixed standard, and the centrifugal dehydrator is used to put the processed polyvinyl alcohol products into dehydration and drying. In specific use, the PVA aging machine 100 according to the present invention is installed after the crusher and before the centrifugal dehydrator. The polyvinyl alcohol products that have been processed by the belt-type alcoholysis device and the crusher are transported to the aging machine according to the present invention. After re-alcoholysis by the aging machine according to the present invention, they are transported to the centrifugal dehydrator for dehydration and drying. By installing a plurality of inlets 101, different additives can be added into the heat conduction case 1 of the PVA aging machine 100 according to the present invention according to the actual market demand. Furthermore, the molar ratio of the alkali added during alcoholysis, the concentration of the styrene acetate methanol solution, and the water content can be adjusted. By installing the trace mechanism 7, the reaction temperature of alcoholysis can be adjusted. In this way, the PVA aging machine 100 according to the present invention can realize the production of polyvinyl alcohol products of multiple specifications.

[0024] In this embodiment, the additive specifically includes acetic acid, methanol, an alkali involved in the alcoholysis reaction, and water. Furthermore, four inlets 101 are installed in the heat conduction case 1, and the four inlets 101 are respectively used to add acetic acid, methanol, an alkali involved in the alcoholysis reaction, and water. However, it is not limited to providing four inlets 101, and other numbers can also be provided. Also, a plurality of additives can share one inlet 101, and a plurality of additives can be added into the heat conduction case 1 through one inlet 101.

[0025] Furthermore, the inlet 101 is installed at the top of the heat conduction case 1, and the discharge pipe 18 communicates with the discharge port.

[0026] Furthermore, an observation port, a light irradiation port, a pressure measurement port, and a temperature measurement port are further installed in the heat conduction case 1.

[0027] In this embodiment, in order to fully react the material and the additive, a relief flap 8 is installed at the discharge port, and when the material is filled in the housing at the position of the relief plate, the discharge is started.

[0028] In this embodiment, as shown in FIGS. 2-3, the PVA aging machine 100 further includes a discharge mechanism 9. The discharge mechanism 9 includes a discharge plate 901 and a link 902. A discharge port is installed in the relief flap 8. The link 902 is connected to the discharge plate 901, and the discharge plate 901 is used to open and close the discharge port. In specific use, the material remaining in the heat conduction case 1 is discharged through the discharge plate 901.

[0029] In this embodiment, as shown in FIG. 3, the PVA aging machine 100 further includes a handle 903, a positioning sleeve 10, and a locking sleeve 11. One end of the link 902 is connected to the discharge plate 901, and the other end of the link 902 extends through the heat conduction case 1. The locking sleeve 11 covers the link 902, and the locking sleeve 11 is fixed to the heat conduction case 1. One end of the positioning sleeve 10 passes through the locking sleeve 11 and is positioned through a restricting structure. The handle 903 covers the outside of the other end of the positioning sleeve 10 and is fixedly connected to the positioning sleeve 10. The other end of the link 902 passes through the positioning sleeve 10 and is screw-connected to the positioning sleeve 10. In specific use, the handle 903 is rotated forward and backward, the link 902 moves the discharge plate 901 away from or closer to the discharge port, and further realizes the opening and closing of the discharge port.

[0030] Furthermore, the restricting structure is specifically a restricting flange. The locking sleeve 11 abuts against the restricting flange, and both ends of the positioning sleeve 10 are respectively positioned on the restricting flange through the handle 903.

[0031] In this embodiment, the PVA aging machine 100 further includes two sealing components. The two sealing components are symmetrically installed at both ends of the heat conduction case 1. An opening for the rotation shaft 2 to penetrate is installed at each of both ends of the heat conduction case 1. The two sealing components correspond one-to-one to the two openings, and the sealing components are used to seal the gap between the side wall of the corresponding opening and the rotation shaft 2.

[0032] Furthermore, as shown in FIG. 4, the seal component includes a first seal sleeve 12, a second seal sleeve 14, and a distribution hole ring 16. The first seal sleeve 12 is installed in the corresponding opening, and the rotating shaft 2 penetrates the first seal sleeve 12. Two seal tooth components are installed on the inner peripheral wall of the first seal sleeve 12 along the axial direction of the first seal sleeve 12. The seal tooth components include a plurality of annular teeth 1201 arranged in parallel along the axial direction of the first seal sleeve 12. A labyrinth cavity is formed between any two adjacent annular teeth 1201. The interior of the first seal sleeve 12 communicates with the discharge port, and the communication position between the first seal sleeve 12 and the discharge port is located between the two seal tooth components. The second seal sleeve 14 is installed at the end of the first seal sleeve 12 away from the heat conduction case 1 and is connected to the first seal sleeve 12. The second seal sleeve 14 is covered by the rotating shaft 2. A filler seal chamber is installed on the inner peripheral wall of the second seal sleeve 14. A plurality of filler seal rings 15 are arranged in parallel along the axial direction of the second seal sleeve 14 in the filler seal chamber, and each filler seal ring 15 is covered by the rotating shaft 2. A seal groove is further installed on the inner peripheral wall of the end of the second seal sleeve 14 close to the first seal sleeve 12, and a lip seal ring 19 is installed in the seal groove. The distribution hole ring 16 is installed between two adjacent filler seal rings 15 among the plurality of filler seal rings 15. The distribution hole ring 16 is covered by the rotating shaft 2. A plurality of intake holes are installed on the circumferential side wall of the distribution hole ring 16. A plurality of first exhaust holes arranged along the circumferential direction of the distribution hole ring 16 and a plurality of second exhaust holes arranged along the circumferential direction of the distribution hole ring 16 are installed at both ends of the distribution hole ring 16 respectively. The intake holes correspond one-to-one to the first exhaust holes and the second exhaust holes. The intake holes communicate with the inert gas and communicate with both the corresponding first exhaust holes and the second exhaust holes.

[0033] Furthermore, specifically, nitrogen gas is used as the inert gas. The first seal sleeve 12 communicates with the discharge port via the flow guide pipe 13, and the communication position between the first seal sleeve 12 and the flow guide pipe 13 is located between the two seal tooth components.

[0034] In specific use, after primary sealing by the first seal sleeve 12, the leakage of the liquid phase and the solid phase is guided to the discharge port via the flow guide pipe 13 and merged, and the leakage of the gas phase is secondary-sealed by the lip seal ring 19, the filler seal ring 15, and the distribution hole ring 16. By installing the seal components, the sealing effect of the PVA aging machine 100 according to this embodiment is greatly improved.

[0035] Furthermore, a third seal sleeve 21 is installed on the heat conduction case 1, the link 902 penetrates through the third seal sleeve 21, and a seal filler for sealing the gap between the third seal sleeve 21 and the link 902 is installed between the third seal sleeve 21 and the link 902. One end of the third seal sleeve 21 is closed, and a supply port and a pressing lid 20 for opening and closing the supply port are installed at the other end, and the seal filler is supplied from the supply port between the third seal sleeve 21 and the link 902.

[0036] In this embodiment, the tracing mechanism 7 is a tracing jacket, and a heat exchange medium is installed inside the tracing jacket.

[0037] Furthermore, the tracing jacket has a tubular structure, but is not limited to the tubular structure. Furthermore, it may also have a honeycomb structure. Also, a plurality of tracing mechanisms 7 may be installed along the length direction of the heat conduction case 1 as needed, and the temperatures of the plurality of tracing mechanisms 7 may be the same or different, and are determined according to actual needs.

[0038] Furthermore, the heat exchange medium is water, but is not limited to water, and other media that enable heat exchange may be selected.

[0039] In this embodiment, in order to more fully mix the material and the additive, the stirring and conveying mechanism further includes a stirring rake 4 installed in sequence along the axial direction of the rotating shaft 2, and the stirring rake 4 includes a plurality of stirring blades uniformly installed along the circumferential direction of the rotating shaft 2, and each stirring blade is fixedly connected to the rotating shaft 2.

[0040] In this embodiment, as shown in FIG. 5, the rotating shaft 2 includes a driving shaft 201 and a driven shaft 202 installed coaxially. One end of the driving shaft 201 is transmitted and connected to one end of the driven shaft 202, and the other ends of the driving shaft 201 and the driven shaft 202 respectively extend through both ends of the heat conduction case 1 and are rotatably supported by two bases 5 respectively.

[0041] Furthermore, a first mounting hole and a second mounting hole are respectively installed at both opposite ends of both the driving shaft 201 and the driven shaft 202. Both ends of the connecting short shaft 203 are respectively inserted into the first mounting hole and the second mounting hole, and both ends of the connecting short shaft 203 are respectively connected to the driving shaft 201 and the driven shaft 202 by a first bolt and a second bolt.

[0042] Furthermore, the connecting short shaft 203 is connected to the inner wall of the heat conduction case 1 through a hanger 17. A hanging sliding bearing is installed on the connecting short shaft 203, the hanging sliding bearing is installed in a hanging bearing seat, and the hanging bearing seat is fixed to the housing through a hanger 17.

[0043] In this embodiment, both the number of the power device 6 and the stirring and conveying mechanism are two. The two stirring and conveying mechanisms are installed in parallel, and the two power devices 6 are respectively used to rotationally drive the two rotating shafts 2. By installing the two stirring and conveying mechanisms, the material and the additive can be more fully mixed.

[0044] In this embodiment, the power device 6 includes a motor, a reducer, and a manual transmission that are sequentially transmitted and connected. The output end of the manual transmission is transmitted and connected to the rotating shaft 2. In specific use, the rotation speed of the rotating shaft 2 is adjusted by the manual transmission.

[0045] In this specification, the principles and embodiments of the present invention have been described using specific examples. However, the descriptions of the above embodiments are only for assisting the understanding of the method of the present invention and its core idea. Moreover, those skilled in the art will have changes in specific embodiments and application scopes based on the idea of the present invention. As described above, the content of this specification should not be understood as a limitation to the present invention.

Description of Reference Numerals

[0046] 100, PVA aging machine; 1, heat conduction case; 101, inlet; 2, rotating shaft; 201, driving shaft; 202, driven shaft; 203, connecting short shaft; 3, spiral blade; 4, stirring rake; 5, base; 6, power device; 7, tracing mechanism; 8, relief flap; 9, discharging mechanism; 901, discharging plate; 902, link; 903, handle; 10, positioning sleeve; 11, locking sleeve; 12, first sealing sleeve; 1201, annular tooth; 13, diversion pipe; 14, second sealing sleeve; 15, filler sealing ring; 16, distribution hole ring; 17, hanger; 18, discharge pipe; 19, lip sealing ring; 20, pressing lid; 21, third sealing sleeve.

Claims

Claim 1 A PVA aging machine, comprising: A heat-conducting case with an inlet for adding additives and an outlet installed at one end; A stirring and conveying mechanism including a rotating shaft and spiral blades provided spirally along the length direction of the rotating shaft, wherein both ends of the rotating shaft extend through both ends of the heat-conducting case, and the spiral blades are used to stir the material installed inside the heat-conducting case and convey the material to the outlet; A base with one base installed at each of both ends of the rotating shaft, and both ends of the rotating shaft are rotatably supported by the two bases respectively; A power device connected to the rotating shaft to drive the rotating shaft to rotate; And a tracing mechanism installed on the heat-conducting case to heat the heat-conducting case and heat the material through the heat-conducting case. The PVA aging machine is characterized by the above. Claim 2 The PVA aging machine according to claim 1, wherein a relief flap is installed at the outlet. Claim 3 Further comprising a discharging mechanism, the discharging mechanism including a discharge plate and a link, a discharge port is installed on the relief flap, the link is connected to the discharge plate, and the discharge plate is used to open and close the discharge port. The PVA aging machine according to claim 2 is characterized by the above. Claim 4 Further comprising a handle, a positioning sleeve, and a locking sleeve. One end of the link is connected to the discharge plate, the other end of the link extends through the heat-conducting case, the locking sleeve is provided on the link and fixed to the heat-conducting case, one end of the positioning sleeve penetrates through the locking sleeve and is positioned through a restricting structure, the handle covers the outside of the other end of the positioning sleeve and is fixedly connected to the positioning sleeve, the other end of the link penetrates through the positioning sleeve and is screw-connected to the positioning sleeve. The PVA aging machine according to claim 3 is characterized by the above. Claim 5 It further includes two sealing components, the two sealing components are symmetrically installed at both ends of the heat-conducting case, and at each of the two ends of the heat-conducting case, an opening for the rotating shaft to penetrate is installed. The two sealing components correspond one-to-one to the two openings, and the sealing component is used to seal the gap between the side wall of the corresponding opening and the rotating shaft. The PVA aging machine according to claim 1, characterized in that.

6. The sealing component includes a first sealing sleeve, a second sealing sleeve, and a distribution hole ring. The first sealing sleeve is installed in the corresponding opening, the rotating shaft penetrates through the first sealing sleeve, and two sealing tooth components are installed on the inner peripheral wall of the first sealing sleeve along the axial direction of the first sealing sleeve. The sealing tooth component includes a plurality of annular teeth arranged in parallel along the axial direction of the first sealing sleeve, and a labyrinth cavity is formed between any two adjacent annular teeth. The interior of the first sealing sleeve communicates with the discharge port, and the communication position between the first sealing sleeve and the discharge port is located between the two sealing tooth components. The second sealing sleeve is installed at the end of the first sealing sleeve away from the heat-conducting case and is connected to the first sealing sleeve. The second sealing sleeve covers the rotating shaft, and a filler sealing chamber is installed on the inner peripheral wall of the second sealing sleeve. A plurality of filler sealing rings are installed in parallel along the axial direction of the second sealing sleeve in the filler sealing chamber. Each filler sealing ring covers the rotating shaft. A sealing groove is further installed on the inner peripheral wall of the end of the second sealing sleeve close to the first sealing sleeve, and a lip sealing ring is installed in the sealing groove. Among the plurality of the filler seal rings, the distribution hole ring is installed between two adjacent filler seal rings. The distribution hole ring is covered by the rotating shaft. A plurality of intake holes are installed on the circumferential side wall of the distribution hole ring. At each of both ends of the distribution hole ring, a plurality of first exhaust holes installed along the circumferential direction of the distribution hole ring and a plurality of second exhaust holes installed along the circumferential direction of the distribution hole ring are installed. The intake holes are in one-to-one correspondence with both the first exhaust holes and the second exhaust holes. The intake holes communicate with an inert gas, and the intake holes communicate with both the corresponding first exhaust holes and the second exhaust holes. The PVA aging machine according to claim 5, characterized in that.

7. The tracing mechanism is a tracing jacket, and a heat exchange medium is installed inside the tracing jacket. The PVA aging machine according to claim 1, characterized in that.

8. The stirring and conveying mechanism further includes a stirring rake installed in sequence along the axial direction of the rotating shaft. The stirring rake includes stirring blades uniformly installed along the circumferential direction of the plurality of rotating shafts. Each of the stirring blades is fixedly connected to the rotating shaft. The PVA aging machine according to claim 1, characterized in that.

9. The rotating shaft includes a driving shaft and a driven shaft installed coaxially. One end of the driving shaft is transmitted and connected to one end of the driven shaft. The other end of the driving shaft and the other end of the driven shaft respectively extend through both ends of the heat conduction case and are respectively rotatably supported by the two bases. The number of the power devices and the stirring and conveying mechanisms are both two. The two stirring and conveying mechanisms are installed in parallel. The two power devices are respectively used to rotationally drive the two rotating shafts. The PVA aging machine according to claim 1, characterized in that.

10. The power device includes a motor, a reducer, and a manual transmission that are transmitted and connected in sequence. The output end of the manual transmission is transmitted and connected to the rotating shaft. The PVA aging machine according to claim 1, characterized in that.

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