Anti-blocking plastic fragment dehydrator

Abstract

The anti-blocking plastic fragment dehydrator comprises an outer shell, an inner screen drum, a centrifugal dehydration mechanism and a positive and negative flushing mechanism, a feeding hopper is arranged at the bottom of the outer shell, and a discharging opening is formed in the top of the outer shell; the inner screen drum is arranged on the inner side of the outer shell and communicates with the feeding hopper. The centrifugal dewatering mechanism comprises a rotating driving part, a middle shaft and a spiral blade, the rotating driving part is installed on the outer shell, the driving end of the rotating driving part is connected with the middle shaft, the spiral blade is arranged on the middle shaft, a hollow cavity is formed in the middle shaft, and a through opening is formed in the bottom of the hollow cavity. The air holes are formed in the center shaft of the centrifugal dewatering mechanism and matched with the positive and negative flushing mechanism, the two effects are achieved, the first effect is outward air blowing, the air drying effect is achieved, the dewatering efficiency of plastic fragments is improved, the second effect is inward air draft, plastic particles are dewatered during air drying, meanwhile, air flow conducts back flushing on an inner screen drum, a self-cleaning mechanism is achieved, and the service life of the plastic particles is prolonged. And blockage is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of plastic processing and recycling equipment, and in particular to an anti-clogging plastic fragment dehydrator. Background Art

[0002] In the plastic recycling and manufacturing industry, a dehydrator is one of the indispensable equipment, which is mainly used to remove moisture from plastic particles or sheets for subsequent storage, transportation and reprocessing. The traditional plastic dehydrator mainly includes a feeding system, a centrifugal dehydration system and a discharge system, wherein the centrifugal dehydration system generates centrifugal force by high-speed rotation to throw out the moisture in the material to achieve the purpose of dehydration. For example, Chinese patent 201820056092.9 discloses a plastic dehydrator, including a frame, a rotating barrel arranged in the frame, a feed pipe arranged outside the frame and connected to the rotating barrel, and a collection device arranged outside the frame and connected to the rotating barrel, a spiral panel is arranged on the inner wall of the rotating barrel, and a plurality of water outlet holes for drainage are also arranged on the inner wall of the rotating barrel, and a filter screen arranged at the bottom of the rotating barrel is also arranged in the frame.

[0003] The above-mentioned prior art still has the following problems: the centrifugal dehydration part usually uses a screen and a drainage hole structure to discharge water stains during the centrifugal dehydration process, and the plastic fragments are mixed with some debris and sundries, which will form residues attached to the screen and the drainage holes. However, the existing dehydrator lacks an effective self-cleaning mechanism, which easily leads to the accumulation of residues and causes the screen and the drainage hole structure to be blocked. The blockage not only seriously affects the operating efficiency of the dehydrator and increases the downtime, but may also cause equipment damage, increase maintenance costs, and even affect the normal operation of the entire production line. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and propose an anti-clogging plastic fragment dehydrator to solve the technical problem that the dehydrator in the prior art lacks an effective self-cleaning mechanism, which easily leads to residue accumulation and causes blockage of the screen and drainage hole structure.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: The present invention provides an anti-clogging plastic fragment dehydrator, comprising: The outer shell has a feed hopper at the bottom and a discharge port at the top; An inner screen cylinder, which is arranged on the inner side of the outer shell and is connected to the feed hopper; A centrifugal dehydration mechanism, comprising a rotating driving member, a central shaft and spiral blades, wherein the rotating driving member is mounted on the outer shell and a driving end thereof is connected to the central shaft, the spiral blades are arranged on the central shaft, a hollow cavity is arranged inside the central shaft, a through opening is provided at the bottom of the hollow cavity, and a plurality of air holes are provided on the outer side thereof, forming an air passage from the through opening, the hollow cavity, the air holes to the inner sieve drum; and The forward and reverse flushing mechanism is arranged on the inner side of the hollow cavity and is used for alternately blowing outwards and sucking inwards.

[0006] In some embodiments, an air separation mechanism is also included. The air separation mechanism is arranged on the discharge port and has two discharge pipes for sorting and screening plastic fragments and debris.

[0007] In some embodiments, a heat pipe is disposed inside the hollow cavity for heating the air.

[0008] In some embodiments, a heat-conducting tube is disposed on the inner bottom wall of the hollow cavity, and the heat-conducting tube is sleeved on the outer side of the heat pipe, and the through port is located on the inner side of the heat-conducting tube.

[0009] In some embodiments, the forward and reverse flushing mechanism includes a first fan and an air guide tube, the air guide tube is inserted into the inner side of the through opening, and one end of the first fan is connected to the air guide tube.

[0010] In some embodiments, the top of the inner screen cylinder is provided with an opening opposite to the discharge port, and an inclined surface is provided between the inner screen cylinder and the outer shell for guiding the material to slide toward the discharge port.

[0011] In some embodiments, the air separation mechanism includes a box body and a second fan, the two discharge pipes are arranged at the bottom of the box body, a baffle located between the two discharge pipes is arranged on the inner bottom wall of the box body, and the second fan is arranged at the bottom of the box body.

[0012] In some embodiments, a mesh is formed on a side of the box away from the outer shell.

[0013] In some embodiments, a plurality of heating elements are disposed on the outer side of the inner sieve cylinder for heating the inner sieve cylinder.

[0014] In some embodiments, a drainage pipe is provided at the bottom of the outer shell and located at the gap between the inner screen drum and the outer shell.

[0015] Compared with the prior art, the anti-clogging plastic fragment dehydrator provided by the present invention has air holes on the central axis of the centrifugal dehydration mechanism for the passage of internal and external air, and cooperates with the forward and reverse flushing mechanisms to form a double effect. The first effect is to blow air outwards, which has an air-drying effect and promotes the dehydration efficiency of the plastic fragments. The second effect is to draw air inwards. While the air-drying promotes the dehydration of the plastic particles, the airflow recoils the inner screen cylinder, which has a self-cleaning mechanism to avoid clogging; forward flushing and reverse suction are performed intermittently, which correspondingly promote the outward rejection of water and the inward recoil to clear blockages. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of an anti-clogging plastic debris dehydrator provided by an embodiment of the present invention; Figure 2 It is a front cross-section and a forward airflow direction diagram of an anti-clogging plastic debris dehydrator provided by an embodiment of the present invention; Figure 3 It is a partial three-dimensional diagram of an anti-clogging plastic debris dehydrator provided by an embodiment of the present invention; Figure 4 It is a partial three-dimensional exploded view of the anti-clogging plastic debris dehydrator provided by an embodiment of the present invention; Figure 5 It is a schematic diagram of the movement of plastic chips of the anti-clogging plastic chip dehydrator provided in an embodiment of the present invention.

[0017] Explanation of the reference numerals: 1. outer shell; 101. feed hopper; 102. discharge port; 103. drain pipe; 2. inner screen cylinder; 201. open mouth; 202. inclined surface; 3. centrifugal dehydration mechanism; 31. rotating drive member; 32. central axis; 33. spiral blade; 3201. hollow cavity; 3202. through port; 3203. air vent; 4. forward and reverse flushing mechanism; 41. first fan; 42. air guide tube; 5. air selection mechanism; 51. box body; 52. second fan; 53. baffle; 54. mesh; 501. discharge pipe; 6. heat pipe; 601. heat-conducting tube; 7. heating element. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] In order to solve the technical problem that the dehydrator lacks an effective self-cleaning mechanism, which easily leads to residue accumulation and causes blockage of the screen and drainage hole structure, the present invention provides an anti-clogging plastic fragment dehydrator that can achieve self-cleaning, is not prone to residue accumulation, and keeps the screen and drainage holes unobstructed.

[0020] It should be noted that the anti-clogging plastic fragments dehydrator described in the present invention is used for but not limited to plastic fragments, etc. For the convenience of explanation, in the present invention, only the application of the anti-clogging plastic fragments dehydrator to the dehydration of plastic fragments is taken as an example for explanation, and the principle of applying the anti-clogging plastic fragments dehydrator to other types of equipment is essentially the same as the principle applied to the dehydration of plastic fragments, which will not be elaborated here.

[0021] See also Figure 1 and Figure 2 , Figure 1 A three-dimensional diagram of an anti-clogging plastic debris dehydrator in one embodiment of the present invention, Figure 2 The figure is a cross-section and forward flushing airflow diagram of the anti-clogging plastic fragment dehydrator in this embodiment. The anti-clogging plastic fragment dehydrator includes an outer shell 1, an inner screen drum 2, a centrifugal dehydration mechanism 3, and a forward and reverse flushing mechanism 4. Among them, a feed hopper 101 is arranged at the bottom of the outer shell 1, and the feed hopper 101 guides the material from the side and enters the inner bottom of the outer shell 1, and then under the action of the centrifugal dehydration mechanism 3, the material moves upward while being centrifugally dehydrated. A discharge port 102 is arranged at the top of the outer shell 1, until the material moves to the discharge port 102 for discharge, completing the entire dehydration process in the outer shell 1; the inner screen drum 2 is arranged on the inner side of the outer shell 1, and is connected to the feed hopper 101, and the feed hopper 101 passes through the outer shell. The outer body 1 is connected to the inner side of the inner screen cylinder 2, and the material is fed into the inner screen cylinder 2. The inner screen cylinder 2 is used to screen the plastic fragments inside the inner screen cylinder 2 during the centrifugal dehydration process, and the water stains pass through the inner screen cylinder 2 and are thrown out; the centrifugal dehydration mechanism 3 includes a rotating drive member 31, a central shaft 32 and a spiral blade 33. The rotating drive member 31 is installed on the outer body 1, and its driving end is connected to the central shaft 32. The central shaft 32 is arranged inside the inner screen cylinder 2, and the spiral blade 33 is arranged on the inner screen cylinder 2. The central axis 32 is provided with a hollow cavity 3201, the bottom of the hollow cavity 3201 is provided with a through opening 3202, and the outer side thereof is provided with a plurality of air holes 3203, so as to form an air passage from the through opening 3202, the hollow cavity 3201, the air holes 3203 to the inner sieve cylinder 2; the forward and reverse flushing mechanism 4 is provided on the inner side of the hollow cavity 3201, and is used for alternately blowing outward and sucking inward, and in the forward and reverse flushing, the air is blown outward and sucked inward. When the mechanism 4 blows outwards, it follows the air passage to break up the plastic fragments being centrifugally dehydrated at the centrifugal dehydration mechanism 3, and promotes the removal of water stains, thereby improving the dehydration efficiency of the plastic fragments. When the forward and reverse flushing mechanism 4 sucks inwards, it goes against the air passage to form a recoil airflow that penetrates the sieve holes on the inner sieve cylinder 2, so that the debris and sundries attached to the sieve holes are recoiled, thereby cleaning the inner sieve cylinder 2 and effectively avoiding clogging of the inner sieve cylinder 2.

[0022] In this embodiment, the feed hopper 101 feeds the material and the material enters the inner screen drum 2. Under the rotation drive of the rotating drive member 31, the central shaft 32 and the spiral blades 33 are driven to rotate. When the spiral blades 33 rotate, the material on the blades will be subjected to an outward centrifugal force. This is because the linear velocity of the rotating object generates an outward force in its radial direction. This force is the centrifugal force, which is used for centrifugal dehydration. In addition, the spiral shape of the spiral blades 33 is designed so that the material is pushed upward along the inclined surface of the spiral blades while being subjected to the centrifugal force. The material continuously moves forward and upward as the spiral blades rotate, and is finally discharged at the discharge port 102.

[0023] In one embodiment, see Figure 1 and Figure 2 Since debris and sundries will be recoiled and re-mixed with the plastic fragments, in order to ensure the purity of the discharged plastic fragments, an air sorting mechanism 5 is also included. The air sorting mechanism 5 is arranged on the discharge port 102, and has two discharge pipes 501 thereon, which are used to sort and screen the plastic fragments and debris and sundries. The sorting is performed by wind power. According to the different densities between the plastic fragments and the debris and sundries, the lighter debris and sundries are blown to the discharge pipe 501 at the far end under the blowing of wind power, while the heavier plastic fragments are discharged from the discharge pipe 501 at the near end.

[0024] For details, please refer to Figure 2 The air selection mechanism 5 includes a box body 51 and a second fan 52. The two discharge pipes 501 are both arranged at the bottom of the box body 51. A baffle 53 located between the two discharge pipes 501 is arranged on the inner bottom wall of the box body 51. The second fan 52 is arranged at the bottom of the box body 51 and blows air toward the upper left. The baffle 53 is located in the blowing direction and is used to separate the two discharge pipes 501. The lighter debris is blown and passes over the baffle 53 to the discharge pipe 501 at the far end, while the heavier plastic fragments are blocked by the baffle 53 and discharged from the discharge pipe 501 at the near end.

[0025] Furthermore, in order to allow the gas to be discharged normally, a mesh hole 54 is formed on a side of the box body 51 away from the outer shell 1 .

[0026] In one embodiment, see Figure 2 A heat pipe 6 is arranged on the inner side of the hollow cavity 3201 for heating the air. Under the heating of the heat pipe 6, the air at normal temperature is heated to hot air, and when it contacts the plastic fragments, it has a thermal drying effect on them. It not only has an air-drying effect, but its heat has a drying and evaporation effect on the moisture, and cooperates with centrifugal dehydration to improve the dehydration efficiency.

[0027] Furthermore, in order to fully heat the blown air, a heat-conducting tube 601 is provided on the inner bottom wall of the hollow cavity 3201, and the heat-conducting tube 601 is sleeved on the outside of the heat pipe 6, and the through-port 3202 is located on the inner side of the heat-conducting tube 601, so that the air first passes through the entire heat pipe 6, and then bends to enter the outside of the heat-conducting tube 601, and when flowing through the heat-conducting tube 601, it also has heat exchange with the heat-conducting tube 601, forming double heating inside and outside, so that the air is fully heated, and when it is blown to contact the plastic fragments, it is effectively heat-dried.

[0028] In one embodiment, see Figure 2 The forward and reverse flushing mechanism 4 includes a first fan 41 and an air guide tube 42. The air guide tube 42 is inserted into the inner side of the through opening 3202. One end of the first fan 41 is connected to the air guide tube 42. The air guide tube 42 is fixed on the outer shell 1 and inserted into the inner side of the through opening 3202. A sealing ring is arranged on the outer side thereof to provide structural sealing when the central axis 32 rotates.

[0029] It can be understood that the sealing of the sealing ring is only one form of rotary sealing, which is not limited here, and other rotary sealing structures can be used to achieve the sealing effect.

[0030] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The top of the inner screen drum 2 is provided with an opening 201 opposite to the discharge port 102, and an inclined surface 202 is provided between the inner screen drum 2 and the outer shell 1 for guiding the material to slide toward the discharge port 102. When the spiral blades 33 transport the material upward to the opening 201, the material overflows and slides into the discharge port 102 along the inclined surface 202, so that the material can be smoothly discharged.

[0031] In one embodiment, see Figure 4 A plurality of heating elements 7 are arranged on the outer side of the inner sieve drum 2 for heating the inner sieve drum 2, wherein both the heat pipe 6 and the heating element 7 can be electric heating pipes, and the heating element 7 heats the inner sieve drum 2 to reduce attached water stains, reduce the probability of debris and sundries adhering to the inner sieve drum 2 due to water stains, and improve the convenience of cleaning.

[0032] In one embodiment, see Figure 2 A drainage pipe 103 is provided at the bottom of the outer shell 1 at the gap between the inner screen drum 2 and the outer shell 1 for draining water stains thrown out by centrifugal dehydration.

[0033] In order to better understand the present invention, the following Figures 1 to 5The technical solution of the present invention is described in detail: the material is put into the feed hopper 101 and flows into the inner screen drum 2. Under the rotation of the spiral blade 33, the material is centrifugally dehydrated and pushed upward. At the same time, the first fan 41 continues to blow air, which is introduced into the hollow cavity 3201 through the air guide tube, and flows upward along the inner side of the heat-conducting tube 601. It is heated by the heat pipe 6 to form hot air, which flows out from the air vents 3203 to dry the material in the inner screen drum 2 with hot air; an intermittent recoil time is set, and when the recoil time is reached, Then, the first fan 41 is switched to exhaust mode to form negative pressure, and the air flow is guided to flow from the inner screen drum 2, the air holes 3203, the hollow cavity 3201 to the through-port 3202 in sequence, and the mesh holes on the inner screen drum 2 are backflushed to achieve the cleaning purpose; the material transported to the top overflows from the open port 201, slides along the inclined surface 202 to the discharge port 102, and enters the air separation mechanism 5, and is sorted under the blowing of the second fan 52, and the two discharge pipes 501 are used to discharge plastic fragments and debris and sundries respectively.

[0034] Compared with the prior art, the embodiments of the present invention have at least the following effects: First, the spiral feeds upward, with a central axis 32 in the middle, and a vent hole 3203 is provided on the central axis 32 for the passage of internal and external air, and can be back-drawn to form a double effect. The first is to blow hot air outward to promote the dehydration efficiency of plastic particles; the second is to draw hot air inward, which promotes the dehydration of plastic particles while back-flushing the external mesh cover to avoid blockage; intermittent forward flushing and back-flushing correspondingly promote outward water rejection and inward back-flushing to clear blockage; a heating element 7 is provided on the mesh cover to heat the inner screen drum 2 to avoid water stains and adhesion of particles; Secondly, the heat-conducting tube 601 compresses the width of the air duct so that the wind can fully fill the hollow cavity 3201 and blow out effectively from each air hole 3203; and, with the improvement of the air ducts on both the inner and outer layers, the air flow path is extended so that it is fully heated; in addition, the inner layer is heated and the outer layer is heated, which has a double heating effect, so that the temperature is effectively maintained within the required temperature range; Thirdly, the spiral blade 33 is used to feed upward, and the plastic fragments and the sundries that are not thrown out are fed upward. A wind separation mechanism 5 is set at the discharge point, and the plastic fragments fall, while the sundries are separated from them by wind separation, so as to avoid mixing sundries at the discharge point.

[0035] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An anti-clogging plastic debris dehydrator, characterized in that: include: The outer shell has a feed hopper at the bottom and a discharge port at the top; An inner screen cylinder, which is arranged on the inner side of the outer shell and is connected to the feed hopper; A centrifugal dehydration mechanism, comprising a rotating driving member, a central shaft and spiral blades, wherein the rotating driving member is mounted on the outer shell, and a driving end thereof is connected to the central shaft, and the spiral blades are arranged on the central shaft, and a hollow cavity is arranged inside the central shaft, a through opening is opened at the bottom of the hollow cavity, and a plurality of air holes are opened on the outer side thereof, forming an air passage from the through opening, the hollow cavity, the air holes to the inner sieve cylinder; as well as The forward and reverse flushing mechanism is arranged on the inner side of the hollow cavity and is used for alternately blowing outwards and sucking inwards.

2. The anti-clogging plastic debris dehydrator according to claim 1, characterized in that: It also includes an air separation mechanism, which is arranged on the discharge port and has two discharge pipes for sorting and screening plastic fragments and debris.

3. The anti-clogging plastic debris dehydrator according to claim 1, characterized in that: A heat pipe is arranged inside the hollow cavity for heating the air.

4. The anti-clogging plastic debris dehydrator according to claim 3, characterized in that: A heat-conducting tube is arranged on the inner bottom wall of the hollow cavity, and the heat-conducting tube is sleeved on the outer side of the heat pipe, and the through opening is located on the inner side of the heat-conducting tube.

5. The anti-clogging plastic debris dehydrator according to claim 1, characterized in that: The forward and reverse flushing mechanism comprises a first fan and an air guide tube. The air guide tube is inserted into the inner side of the through hole. One end of the first fan is connected to the air guide tube.

6. The anti-clogging plastic debris dehydrator according to claim 1, characterized in that: An opening opposite to the discharge port is formed on the top of the inner screen cylinder, and an inclined surface is provided between the inner screen cylinder and the outer shell body for guiding the material to slide toward the discharge port.

7. The anti-clogging plastic debris dehydrator according to claim 2, characterized in that: The air separation mechanism includes a box body and a second fan, the two discharge pipes are arranged at the bottom of the box body, a baffle located between the two discharge pipes is arranged on the inner bottom wall of the box body, and the second fan is arranged at the bottom of the box body.

8. The anti-clogging plastic debris dehydrator according to claim 7, characterized in that: A mesh hole is formed on one side of the box body away from the outer shell.

9. The anti-clogging plastic debris dehydrator according to claim 1, characterized in that: A plurality of heating elements are arranged on the outer side of the inner screen cylinder for heating the inner screen cylinder.

10. The anti-clogging plastic debris dehydrator according to claim 1, characterized in that: A drainage pipe located at the gap between the inner screen drum and the outer shell is arranged at the bottom of the outer shell.

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