A rapid drying device and drying method for resin sand mixed with antistatic agent

Abstract

The invention relates to the technical field of drying devices, and in particular to a rapid drying device and a drying method for resin sand mixed with an antistatic agent. The rapid drying device for resin sand mixed with an antistatic agent comprises an inner cylinder with a feed port and an outer cylinder with a discharge port, a screen cylinder is arranged in the outer cylinder, a screw feeder is arranged between the screen cylinder and the discharge port, a feed fan and a discharge fan are arranged at both ends of the outer cylinder, an agitator is arranged in the inner cylinder, and the agitator has a vibration connecting piece capable of controlling the inner cylinder to vibrate during its startup process, and a rotating connecting piece for synchronously controlling the rotation of the screen cylinder. The invention separates the resin sand according to the particle size through the screening effect of the screen cylinder, small-size particles pass through and are dried quickly, and large-size particles are subjected to a longer drying treatment, thereby ensuring that resin sands of different particle sizes can reach a suitable drying state, and improving the pertinence and efficiency of drying.

Description

Technical Field

[0001] The invention relates to the technical field of drying devices, in particular to a rapid drying device for resin sand mixed with an antistatic agent, and also to a drying method for the rapid drying device for resin sand mixed with an antistatic agent. Background Art

[0002] Existing drying equipment quickly dehydrates by rotating the dehydration barrel, thereby improving the drying efficiency. However, during the drying process, a large amount of resin sand mixed with an antistatic agent is placed in a space for drying. If some particles clump together due to moisture, the particles inside the accumulation may be heated unevenly, affecting the drying effect. In addition, using the same drying time for particles of different particle sizes may result in insufficient drying of large-size particles and excessive solidification of small-size particles.

[0003] The currently disclosed Chinese patent CN118066841B discloses a resin drying device, comprising a frame, an outer cylinder, the outer cylinder is fixedly arranged on the top of the frame, a feed port and a discharge port are provided on the outer cylinder, an inner cylinder, the inner cylinder is rotatably arranged inside the outer cylinder, and a gap is provided between the inner cylinder and the outer cylinder, the interior of the inner cylinder is connected with the discharge port, a spiral plate, the spiral plates are provided in plurality, the plurality of spiral plates are arranged between the inner cylinder and the outer cylinder, the plurality of spiral plates are installed on the inner cylinder at intervals along the length direction of the inner cylinder, and a spiral channel is formed between two adjacent spiral plates, the ends of the plurality of spiral channels are connected, and an annular cavity is formed, the inner cylinder is provided with a through hole, the annular cavity is connected with the interior of the inner cylinder through the through hole, and a hot air blower is provided at one end of the outer cylinder, and the air outlet of the hot air blower is connected with the interior of the inner cylinder. The hot air provided by the hot air blower can pass through the inner cylinder, the spiral channel and the annular cavity in sequence to dry the material. The grading component includes a support rod and a plurality of shoveling plates rotatably arranged on the support rod. The support rod passes through the plurality of spiral plates and is movably connected to the spiral plates. The plurality of shoveling plates are respectively arranged in the plurality of spiral channels, and each shoveling plate can rotate synchronously with the inner cylinder. The first driving component can drive the inner cylinder to rotate. The second driving component can drive the shoveling plate to rotate relative to the inner cylinder, and gradually increase the gap between the shoveling plate and the inner wall of the outer cylinder. The shoveling plate includes a connecting member and a plurality of rods. The connecting member is rotatably sleeved on the outer side of the support rod. The plurality of rods are evenly distributed on both sides of the connecting member, and a gap for small-size particles to pass through is formed between two adjacent rods.

[0004] According to the above patent, the above patent uses a spiral method to transport resin particles, so that the resin particles can be dispersed in multiple spiral channels, so that the resin particles are not easy to accumulate, and the drying efficiency of the resin particles can be improved. At the same time, a grading component is provided, which can pick up the resin particles through a shovel, and as the gap between the shovel and the inner wall of the outer cylinder gradually increases, the resin particles of different particle sizes can fall down in sequence, so that the particles of different particle sizes are in the spiral channel for different times, so that the resin particles of different particle sizes are dried for different times. However, although the patent can dry particles of different particle sizes to different degrees, resin particles with too small a particle size may pass through the slit of the shovel and gather in an unexpected position, or particles with too large a particle size and irregular shape may be stuck in the channel or between the shovels, affecting normal operation, so that resin particles of different particle sizes cannot be effectively distinguished and cause blockage, reducing the drying effect. Therefore, there is a need for an efficient drying device that can automatically grade and dynamically adapt to resin sands of different particle sizes to solve the drying degree and blockage problems of particle size treatment in the prior art and ensure the efficiency and continuity of the drying process. Summary of the invention

[0005] In view of the problems existing in the prior art, a rapid drying device for resin sand mixed with an antistatic agent is provided. The present invention separates the resin sand according to particle size through the screening effect of a sieve cylinder. Small-sized particles pass through quickly and are dried, while large-sized particles are dried for a longer time, thereby ensuring that resin sands of different particle sizes can reach a suitable drying state, thereby improving the pertinence and efficiency of drying.

[0006] In order to solve the problems in the prior art, the present invention provides a rapid drying device for resin sand mixed with an antistatic agent, comprising an inner cylinder with a feed port, and an outer cylinder with a discharge port, wherein a sieve cylinder is provided at one end of the outer cylinder facing the inner cylinder and away from the feed port, wherein the sieve cylinder is used for screening out resin sand with small particle size, and a screw feeder is provided between the sieve cylinder and the discharge port, wherein the screw feeder is used for conveying the screened resin sand with large particle size toward the discharge port, and a feed fan and a discharge fan are provided at both ends of the outer cylinder, as well as a feed air port and a discharge air port for providing a hot air flow, wherein the feed fan is used for pushing the resin sand entering from the feed port along the inner cylinder toward the sieve cylinder in the form of wind, and the discharge fan is used for pushing the resin sand with large particle size that has not been screened out on the sieve cylinder along the sieve cylinder toward the discharge port in the form of wind, and an agitator is provided in the inner cylinder, and the agitator has a vibration connecting member capable of controlling the vibration of the inner cylinder during its startup process, and a rotation connecting member for synchronously controlling the rotation of the sieve cylinder.

[0007] Preferably, the inner side of the outer cylinder has an inner liner which is sleeved on the inner cylinder, an internal gap is left between the inner liner and the inner cylinder, the outer side of the outer cylinder has an outer liner which is sleeved on the outer cylinder, an external gap is left between the outer liner and the outer cylinder, and the internal gap and the external gap are connected by an air duct extending to the feed fan.

[0008] Preferably, the screw feeder is arranged between the outer cylinder and the inner container, and the screw feeder has a ring sleeve extending toward the screen cylinder, and a plurality of fixing rods are fixedly connected between the screen cylinder and the ring sleeve.

[0009] Preferably, the agitator has a rotating shaft arranged along the axial direction of the inner cylinder, and a stirring rod arranged on the rotating shaft and extending toward the conical surface of the inner cylinder. An extension rod is fixedly provided on the inner wall of the inner cylinder toward its conical surface to cooperate with the stirring rod to break up the resin sand.

[0010] Preferably, the agitator also has a driving shaft for controlling the rotation of the rotating shaft, and the ends of the rotating shaft and the driving shaft that are separated from each other are respectively rotatably arranged on the outer cylinder, and the rotating shaft can also move along its axial direction relative to the driving shaft, and the ends of the rotating shaft and the driving shaft that are close to each other are connected in a snap-fitting form, the vibration connecting piece is connected between the rotating shaft and the inner cylinder, and the rotating connecting piece is connected between the driving shaft and the screen cylinder.

[0011] Preferably, the vibration connecting member comprises an inner ring arranged around the port of the inner cylinder, and an outer ring sleeved on the inner ring and integrally connected to the inner cylinder, a ball is arranged between the inner ring and the outer ring, and an annular groove is formed for the ball to be embedded therein, a support rod is fixedly connected between the inner ring and the rotating shaft, a limit strip is slidably connected between the outer ring and the inner liner, the vibration connecting member also comprises a trigger structure for driving the inner cylinder to move, and a reset spring is fixedly arranged between the rotating shaft and the driving shaft for cooperating with the trigger structure to make the inner cylinder produce a vibration effect.

[0012] Preferably, the trigger structure has a pressure-applying portion uniformly distributed in the circumferential direction of the ring sleeve around the screw feeder, and a pressure-receiving portion uniformly distributed in the circumferential direction around the outer ring. When the screen drum rotates following the driving shaft, the screw feeder also rotates following the screen drum. Whenever the pressure-applying portion passes through the pressure-receiving portion, and under the action of the reset spring, the outer ring and the inner drum continuously vibrate.

[0013] Preferably, the trigger structure has an inflation tube arranged at the end of the rotating shaft away from the driving shaft, the inflation tube is fixedly connected to the outer cylinder, the end of the rotating shaft has a socket for inserting the inflation tube, and the rotating shaft is also provided with a pressure relief port connected to the socket. When the inflation tube is inflated toward the rotating shaft, the rotating shaft moves relative to the driving shaft under the thrust of the air pressure, and when the inflation tube stops inflating, the air pressure is released from the pressure relief port. With the intermittent inflation of the inflation tube and under the action of the reset spring, the rotating shaft drives the inner cylinder to vibrate continuously.

[0014] Preferably, the rotary connector has a baffle fixed between the drive shaft and the screen drum, and a tuyere is provided at the connection between the baffle and the screen drum for allowing the airflow generated by the discharge fan to flow along the conical surface of the screen drum.

[0015] The present invention also provides a drying method of a rapid drying device for resin sand mixed with an antistatic agent, comprising the following steps:

[0016] S1, resin sand containing antistatic agent is fed into the inner cylinder through the feed port;

[0017] S2, introducing hot air flow toward the inner cylinder through both the feeding fan and the discharging fan, so that the resin sand moving and dispersed in the inner cylinder is preliminarily dried;

[0018] S3, the resin sand falling into the sieve drum is screened by the sieve drum, and the small-sized particles pass through, while the large-sized particles remain in the sieve drum for further drying;

[0019] S4. The large-sized particles slide down to the screw feeder and continue to be dried by the hot air flow until the screw feeder pushes the large-sized resin sand out of the discharge port, completing the final drying.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention introduces hot air flow for heating through an air duct arranged between the outer cylinder and the inner cylinder, thereby maintaining a constant working temperature, continuously providing heat energy to the surfaces of the inner cylinder and the outer cylinder, ensuring the temperature stability during the drying process of the resin sand, and reducing heat loss. It not only accelerates the drying process of the resin sand in the inner cylinder, but also in the process of conveying large-particle resin sand by the screw feeder, the additional heat provided by the outer cylinder further accelerates the drying process of larger particles, ensuring that resin sands of all sizes can reach an ideal drying state.

[0022] 2. The present invention breaks up the agglomerated resin sand through the cooperation between the stirring rod and the extension rod, so that the resin sand is dispersed, and the gaps between the resin sand particles after being broken up are increased, which promotes the uniform penetration of hot air, ensures that the resin sand receives sufficient and uniform heat energy, improves the uniformity of drying, and the loose and uniform small-particle resin sand can pass through the screen more smoothly, while the large particles continue to be dried, which not only improves the screening efficiency, but also ensures that resin sands of different particle sizes are dried for different times.

[0023] 3. The present invention converts the movement of the rotating shaft into the vibration of the inner cylinder along the axial direction through the vibrating connecting piece, which is helpful for better dispersion of the resin sand in the inner cylinder. The vibration of the inner cylinder can not only enhance the dispersion of the resin sand, but also promote the penetration of the airflow, making the drying process more efficient. The screen cylinder is connected to the drive shaft through the rotating connecting piece and rotates independently of the vibration of the inner cylinder, ensuring the continuity and efficiency of the screening process and realizing the synchronous rotation of the vibration of the inner cylinder and the screen cylinder, which not only improves the drying effect of the dispersed resin sand, but also helps to screen resin sands of different particle sizes and improve the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of a rapid drying device for resin sand mixed with an antistatic agent.

[0025] Figure 2 The present invention is a partial three-dimensional structural cross-sectional view showing the direction of the feed inlet of a rapid drying device for resin sand mixed with an antistatic agent.

[0026] Figure 3 The present invention is a partial three-dimensional structural cross-sectional view showing the direction of the discharge port of a rapid drying device for resin sand mixed with an antistatic agent.

[0027] Figure 4 The present invention is a partial plan cross-sectional view of a rapid drying device for resin sand mixed with an antistatic agent.

[0028] Figure 5 The present invention is a three-dimensional structural cross-sectional view of the middle section of a rapid drying device for resin sand mixed with an antistatic agent.

[0029] Figure 6 The invention is a three-dimensional structural diagram of a screen drum and a screw feeder with a feed fan facing a rapid drying device of resin sand mixed with an antistatic agent.

[0030] Figure 7 The invention is a three-dimensional structural diagram of a screen drum and a screw feeder with a discharge fan facing a rapid drying device of resin sand mixed with an antistatic agent.

[0031] Figure 8 yes Figure 5 An enlarged schematic diagram of point A.

[0032] Fig. 9 yes Figure 5 An enlarged schematic diagram of point B.

[0033] Fig.10 yes Figure 5 Enlarged schematic diagram of point C.

[0034] The numbers in the figure are: 1, inner cylinder; 11, feed port; 12, inner liner; 121, internal gap; 13, outer liner; 131, external gap; 14, airway; 2, outer cylinder; 21, discharge port; 22, feed fan; 221, feed air port; 23, discharge fan; 231, discharge air port; 3, sieve cylinder; 4, screw feeder; 41, ring sleeve; 411, pressure-applying part; 412, pressure-receiving part; 42, fixing rod; 5, Agitator; 51, rotating shaft; 511, stirring rod; 512, extension rod; 513, inflation tube; 5131, socket; 5132, pressure relief port; 52, driving shaft; 521, slot; 522, clamping strip; 6, vibration connector; 61, inner ring; 611, support rod; 62, outer ring; 621, limit strip; 63, ball; 64, return spring; 7, rotating connector; 71, baffle; 711, air outlet. DETAILED DESCRIPTION

[0035] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0036] See also Figure 1-Figure 7 As shown, a rapid drying device for resin sand mixed with an antistatic agent comprises an inner cylinder 1 having a feed port 11, and an outer cylinder 2 having a discharge port 21, wherein a screen cylinder 3 is provided at one end of the outer cylinder 2 facing the inner cylinder 1 and away from the feed port 11, wherein the screen cylinder 3 is used to screen out resin sand with small particle size, and a screw feeder 4 is provided between the screen cylinder 3 and the discharge port 21, wherein the screw feeder 4 is used to transport the screened resin sand with large particle size toward the discharge port 21, and a feed fan 22 and a discharge fan 23 are provided at both ends of the outer cylinder 2, respectively. , and a feed air port 221 and a discharge air port 231 for providing hot air flow, the feed fan 22 is used to push the resin sand entering from the feed port 11 along the inner cylinder 1 toward the screen cylinder 3 in the form of wind, and the discharge fan 23 is used to push the large-particle resin sand that has not been screened out on the screen cylinder 3 along the screen cylinder 3 toward the discharge port 21 in the form of wind. A stirrer 5 is provided in the inner cylinder 1, and the stirrer 5 has a vibration connecting member 6 that can control the vibration of the inner cylinder 1 during its startup process, and a rotating connecting member 7 that synchronously controls the rotation of the screen cylinder 3.

[0037] The inner surface of the inner cylinder 1 is a conical surface for the resin sand to slide down in the direction of the screen cylinder 3 , and the inner surface of the screen cylinder 3 is a conical surface for the resin sand to slide down in the direction of the screw feeder 4 .

[0038] When the drying process begins, the resin sand containing the antistatic agent is fed into the inner cylinder 1 through the feed port 11, and the feed fan 22 is immediately started to generate directional wind force, pushing the resin sand along the conical inner surface of the inner cylinder 1 toward the screen cylinder 3 at one end of the outer cylinder 2. The effect of the antistatic agent is apparent at this time, which effectively reduces the electrostatic attraction between the resin sand particles, making it easy to separate the particles and facilitate subsequent processing. As the agitator 5 inside the inner cylinder 1 is started, it not only promotes the uniformity of drying, but also the vibration connector 6 thereon causes the inner cylinder 1 to generate micro-vibration, which is conducive to the formation of gaps between particles. The contact area of ​​the hot air flow is increased. At the same time, the feeding fan 22 is cooperated to slide the resin sand along the conical surface of the inner cylinder 1 toward the screen cylinder 3. When the resin sand reaches the screen cylinder 3, the agitator 5 and the screen cylinder 3 rotate synchronously through the rotating connection 7, so that the resin sand is evenly screened in the screen cylinder 3, and further promotes the drying efficiency of the resin sand on the screen cylinder 3 guided by the hot air flow by the discharge fan 23. During the rotation of the screen cylinder 3, small-sized particles can be smoothly screened out through the screen on the screen cylinder 3 due to their size advantage, and the resin sand moves in the inner cylinder 1 and is screened by the hot air flow. The resin sand in the screen drum 3 is continuously turned over during its rotation. Therefore, the resin sand with small particle size screened out is in a dried state, while the resin sand with large particle size is left on the screen drum 3. At this time, the resin sand with large particle size needs to be dried longer than the resin sand with small particle size. Therefore, the resin sand with large particle size needs to be further dried. Due to the start-up of the discharge fan 23, the wind force generated pushes the resin sand with large particle size left on the screen drum 3 toward the screw feeder 4, so that the resin sand with large particle size slides to the screw feeder 4 during the rotation of the screen drum 3. 4, through the continuous pushing of the screw feeder 4, the resin sand with large particle size is transported toward the discharge port 21 of the outer cylinder 2. In this process, with the assistance of the hot air flow, not only the transportation process is accelerated, but also the resin sand with large particle size is further dried, so that not only the surface of the resin sand with large particle size is dried, but also the inside thereof is dried, until the resin sand with large particle size is discharged from the discharge port 21, the graded drying effect of the resin sand mixed with the antistatic agent is completed, which not only improves the drying efficiency, but also ensures that the drying degree of the resin sand with different particle sizes reaches a suitable state.

[0039] See also Figure 2-Figure 5 As shown, the inner side of the outer cylinder 2 has an inner liner 12 which is sleeved on the inner cylinder 1, and an internal gap 121 is left between the inner liner 12 and the inner cylinder 1. The outer side of the outer cylinder 2 has an outer liner 13 which is sleeved on the outer cylinder 2, and an external gap 131 is left between the outer liner 13 and the outer cylinder 2. The internal gap 121 and the external gap 131 are connected by an air duct 14 extending to the feed fan 22.

[0040] The internal gap 121 and the external gap 131 are connected through the air duct 14, and the air duct 14 extends to the vicinity of the feed fan 22, ensuring that part of the hot air flow originally directly involved in the drying of the resin sand can be effectively guided to the internal gap 121 and the external gap 131. The hot air flow introduced through the air duct 14 passes through the internal gap 121 and the external gap 131, and continuously provides heat energy for the surfaces of the inner tube 1 and the outer tube 2, effectively maintaining the temperature and reducing heat loss. It not only accelerates the drying process of the resin sand in the inner tube 1, but also prevents heat from being directly dissipated into the environment. In the process of the screw feeder 4 transporting the large-particle resin sand toward the discharge port 21, the heat of the outer tube 2 again provides heat energy for the drying of the resin sand, thereby ensuring that the drying effect of the large-particle resin sand reaches a suitable state and improving the overall thermal efficiency.

[0041] See also Figure 2-Figure 5 As shown, the screw feeder 4 is arranged between the outer cylinder 2 and the inner container 12 , and the screw feeder 4 has a ring sleeve 41 extending toward the screen cylinder 3 , and a plurality of fixing rods 42 are fixedly connected between the screen cylinder 3 and the ring sleeve 41 .

[0042] When the screen drum 3 starts to rotate, since the screen drum 3 and the screw feeder 4 are fixedly connected together by the fixing rod 42, the screw feeder 4 also moves synchronously therewith, ensuring that the resin sand can be evenly and continuously pushed along the spiral blades of the screw feeder 4 toward the discharge port 21, effectively promoting the smooth movement of large-particle resin sand and avoiding blockage and accumulation. The screw feeder 4 not only realizes the effective transportation and further drying of large-particle resin sand, but also ensures the continuity and stability of the entire processing flow, significantly improves the drying efficiency, reduces the resin sand processing time, and at the same time ensures the uniformity of resin sand drying and the high quality of the final product.

[0043] See also Figure 2-Figure 5 As shown, the agitator 5 has a rotating shaft 51 arranged along the axial direction of the inner cylinder 1, and a stirring rod 511 arranged on the rotating shaft 51 and extending toward the conical surface of the inner cylinder 1. An extension rod 512 is fixedly arranged on the inner wall of the inner cylinder 1 toward its conical surface and cooperates with the stirring rod 511 to break up the resin sand.

[0044] When the rotating shaft 51 drives the stirring rod 511 to rotate, the stirring rod 511 and the extension rod 512 on the inner wall move in an interlaced manner, so that the stirring rod 511 can effectively contact and penetrate the resin sand clumps during the rotation process, and the extension rod 512 helps to break up these clumps. The precise coordination of the stirring rod 511 and the extension rod 512, through physical impact and shear force, finely disperses the resin sand that may have originally clumped, which not only destroys the adhesion between the resin sands, but also increases the gaps between the resin sand particles to facilitate air circulation. The dispersed resin sand particles are looser and more uniform, which greatly improves the efficiency and quality of subsequent screening by the screen drum 3. Small particles can pass through the screen smoothly, while large particles continue to be dried under the action of the screw feeder 4, ensuring that all resin sands can be fully and evenly dried.

[0045] See also Figure 2-Figure 5 and Figure 8 As shown, the agitator 5 also has a driving shaft 52 for controlling the rotation of the rotating shaft 51. The ends of the rotating shaft 51 and the driving shaft 52 that are far away from each other are respectively rotatably arranged on the outer cylinder 2. The rotating shaft 51 can also move along its axial direction relative to the driving shaft 52. The ends of the rotating shaft 51 and the driving shaft 52 that are close to each other are connected in a snap-fitting form. The vibration connecting member 6 is connected between the rotating shaft 51 and the inner cylinder 1, and the rotating connecting member 7 is connected between the driving shaft 52 and the screen cylinder 3.

[0046] The end of the rotating shaft 51 close to the driving shaft 52 is provided with a slot 521 along its axial direction, and the end of the driving shaft 52 close to the rotating shaft 51 is provided with a clip 522 engaged in the slot 521 along its axial direction. The driving shaft 52 is driven by a rotary driver which is not shown in the figure. When the driving shaft 52 rotates, the rotating shaft 51 rotates together with it. At the same time, the rotating shaft 51 can also move relative to the driving shaft 52, so that in the process of synchronously driving the screen drum 3 to rotate, the inner drum 1 can be driven to vibrate along its axial direction.

[0047] See also Figure 2-Figure 5 and Figure 8 As shown, the vibration connecting member 6 has an inner ring 61 arranged around the end of the inner cylinder 1, and an outer ring 62 sleeved on the inner ring 61 and connected to the inner cylinder 1 as a whole, a ball 63 is arranged between the inner ring 61 and the outer ring 62, and an annular groove is formed for the ball 63 to be embedded therein, a support rod 611 is fixedly connected between the inner ring 61 and the rotating shaft 51, a limit strip 621 is slidably connected between the outer ring 62 and the inner liner 12, the vibration connecting member 6 also has a trigger structure for driving the inner cylinder 1 to move, and a return spring 64 is fixedly arranged between the rotating shaft 51 and the driving shaft 52 for cooperating with the trigger structure to make the inner cylinder 1 produce a vibration effect.

[0048] The inner liner 12 is provided with the limit strip 621 along its axial direction, and the outer ring 62 is provided with a slide groove that is slidably engaged with the limit strip 621. When the rotating shaft 51 rotates following the driving shaft 52, the rotating shaft 51 synchronously drives the inner ring 61 to rotate. Since the inner ring 61 and the outer ring 62 are connected by the ball 63, and the outer ring 62 is restricted by the limit strip 621, the outer ring 62 is in a stationary state relative to the inner ring 61. When the trigger structure drives the inner cylinder 1 to move, the rotating shaft 51 moves relative to the driving shaft 52. Due to the action of the reset spring 64, the inner cylinder 1 can be quickly reset after moving. Under the cooperation of the trigger structure and the reset spring 64, the inner cylinder 1 is continuously vibrated along its axial direction, which effectively disperses the resin sand in the inner cylinder 1 and cooperates with the feed fan 22 to transport the resin sand toward the screen cylinder 3.

[0049] See also Figure 2-Figure 5 , Figure 8 and Fig. 9 As shown, the trigger structure has a pressure-applying portion 411 uniformly distributed in the circumferential direction of the ring sleeve 41 around the screw feeder 4, and a pressure-receiving portion 412 uniformly distributed in the circumferential direction around the outer ring 62. When the screen drum 3 rotates following the driving shaft 52, the screw feeder 4 also rotates following the screen drum 3. Whenever the pressure-applying portion 411 passes through the pressure-receiving portion 412, and under the action of the reset spring 64, the outer ring 62 and the inner drum 1 continuously vibrate.

[0050] As the screen drum 3 rotates with the driving shaft 52, the screw feeder 4 also rotates accordingly. During this rotation process, the pressure-applying portion 411 will periodically contact and apply pressure to the corresponding pressure-receiving portion 412. When the pressure-applying portion 411 passes through the pressure-receiving portion 412, the instantaneous pressure is transmitted to the outer ring 62, and then through the connection between the outer ring 62 and the inner drum 1, the inner drum 1 generates rapid reciprocating vibrations along the axial direction under the reverse action of the return spring 64, constantly breaking the original equilibrium state of the inner drum 1 and quickly restoring it, thereby generating continuous vibration. The vibration of the inner drum 1 effectively disperses the resin sand clumps and improves the drying effect. Combined with the wind force of the feed fan 22, the resin sand can gradually slide toward the screen drum 3.

[0051] See also Figure 2-Figure 5 , Figure 8 and Fig.10As shown, the trigger structure has an air-filling tube 513 arranged at the end of the rotating shaft 51 away from the driving shaft 52, and the air-filling tube 513 is fixedly connected to the outer tube 2. The end of the rotating shaft 51 has a socket 5131 for inserting the air-filling tube 513, and the rotating shaft 51 is also provided with a pressure relief port 5132 connected with the socket 5131. When the air-filling tube 513 is inflated toward the rotating shaft 51, the rotating shaft 51 moves relative to the driving shaft 52 under the thrust of the air pressure, and when the air-filling tube 513 stops inflating, the air pressure is released from the pressure relief port 5132. With the intermittent inflation of the air-filling tube 513 and under the action of the reset spring 64, the rotating shaft 51 drives the inner tube 1 to continuously vibrate.

[0052] When the inflation tube 513 inflates air into the socket 5131 at the end of the rotating shaft 51, the gas pressure pushes the rotating shaft 51 to move along the axial direction, creating an initial driving force for the vibration of the inner cylinder 1. After the inflation stops, the gas is released through the pressure relief port 5132 on the rotating shaft 51, the pressure is reduced, and the reset spring 64 immediately takes effect to restore the rotating shaft 51 to its original position. This reciprocating action forms a continuous vibration of the inner cylinder 1 along the axis. The vibration of the inner cylinder 1 effectively disperses the resin sand clumps and improves the drying effect. Combined with the wind force of the feed fan 22, the resin sand can gradually slide toward the screen cylinder 3.

[0053] See also Figure 4 , Figure 5 and Figure 7 As shown, the rotating connecting member 7 has a baffle 71 fixed between the driving shaft 52 and the sieve drum 3 , and a tuyere 711 is provided at the connection between the baffle 71 and the sieve drum 3 for allowing the airflow generated by the discharge fan 23 to flow along the conical surface of the sieve drum 3 .

[0054] When the discharge fan 23 is running, the airflow generated by the discharge fan 23 passes through the air outlet 711 on the baffle 71 and is effectively guided to the screen drum 3, so that the hot air flow flows downward along the conical surface of the screen drum 3. The directional airflow enhances the movement of the resin sand in the screen drum 3 and speeds up the speed at which fine particles pass through the sieve holes. At the same time, it also provides heat and effectively pushes the large-particle-size resin sand toward the direction of the screw feeder 4, thereby significantly improving the efficiency of the screening operation.

[0055] A drying method for a rapid drying device for resin sand mixed with an antistatic agent, applied to a rapid drying device for resin sand mixed with an antistatic agent, comprises the following steps:

[0056] S1, resin sand containing antistatic agent is fed into inner tube 1 through feed port 11;

[0057] S2, introducing hot air flow toward the inner tube 1 through the feed fan 22 and the discharge fan 23, so that the resin sand moving and dispersed in the inner tube 1 is preliminarily dried;

[0058] S3, the resin sand falling into the sieve drum 3 is rotated and screened by the sieve drum 3, and the small-sized particles pass through, while the large-sized particles remain in the sieve drum 3 for further drying;

[0059] S4, the large-size particles slide down to the screw feeder 4 and continue to be dried by the hot air flow until the screw feeder 4 pushes the large-size resin sand out from the discharge port 21, completing the final drying.

[0060] The present invention separates the resin sand according to the particle size through the screening effect of the screen drum 3. Small-sized particles pass through and are dried quickly, while large-sized particles are dried for a longer time, ensuring that resin sands of different particle sizes can reach a suitable drying state, improving the targetedness and efficiency of drying, and with the coordinated work of the feed fan 22 and the discharge fan 23, as well as the action of the screw feeder 4, the resin sand flow is effectively promoted, reducing the risk of blockage, and the accompanying hot air flow assists in accelerating the drying process, which not only achieves rapid, efficient, and graded drying of the resin sand mixed with the antistatic agent, but also ensures the drying uniformity and high quality of resin sands of different particle sizes, effectively improving the overall efficiency of the drying operation and the final quality of the product.

[0061] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A rapid drying device for resin sand mixed with an antistatic agent, characterized in that: It comprises an inner cylinder (1) having a feed port (11), and an outer cylinder (2) having a discharge port (21), wherein a screen cylinder (3) is provided at one end of the outer cylinder (2) facing the inner cylinder (1) and away from the feed port (11), wherein the screen cylinder (3) is used to screen out resin sand with small particle sizes, and a screw feeder (4) is provided between the screen cylinder (3) and the discharge port (21), wherein the screw feeder (4) is used to transport the screened resin sand with large particle sizes toward the discharge port (21); A feed fan (22) and a discharge fan (23) are respectively provided at both ends of the outer cylinder (2), as well as a feed air port (221) and a discharge air port (231) for providing hot air flow. The feed fan (22) is used to push the resin sand entering from the feed port (11) along the inner cylinder (1) toward the screen cylinder (3) by wind force, and the discharge fan (23) is used to push the resin sand with large particle size that has not been screened out on the screen cylinder (3) along the screen cylinder (3) toward the discharge port (21) by wind force. The inner cylinder (1) is provided with a stirrer (5), and the stirrer (5) has a vibration connection member (6) capable of controlling the vibration of the inner cylinder (1) during its startup process, and a rotation connection member (7) capable of synchronously controlling the rotation of the screen cylinder (3); The agitator (5) comprises a rotating shaft (51) arranged in the inner cylinder (1) along the axial direction thereof, and a stirring rod (511) arranged on the rotating shaft (51) and extending in the direction of the conical surface of the inner cylinder (1); an extension rod (512) is fixedly provided on the inner wall of the inner cylinder (1) in the direction of the conical surface thereof and cooperates with the stirring rod (511) to break up the resin sand; The agitator (5) further comprises a driving shaft (52) for controlling the rotation of the rotating shaft (51); the ends of the rotating shaft (51) and the driving shaft (52) which are separated from each other are respectively rotatably arranged on the outer cylinder (2); the rotating shaft (51) is also movable relative to the driving shaft (52) along its axial direction; the ends of the rotating shaft (51) and the driving shaft (52) which are close to each other are connected in a snap-fitting manner; the vibration connecting member (6) is connected between the rotating shaft (51) and the inner cylinder (1); and the rotating connecting member (7) is connected between the driving shaft (52) and the screen cylinder (3); The vibration connecting member (6) comprises an inner ring (61) arranged around the end of the inner cylinder (1), and an outer ring (62) sleeved on the inner ring (61) and connected to the inner cylinder (1); a ball (63) is arranged between the inner ring (61) and the outer ring (62), and an annular groove is formed for the ball (63) to be embedded therein; a support rod (611) is fixedly connected between the inner ring (61) and the rotating shaft (51); a limit strip (621) is slidably connected between the outer ring (62) and the inner liner (12); the vibration connecting member (6) further comprises a trigger structure for driving the inner cylinder (1) to move; a return spring (64) is fixedly arranged between the rotating shaft (51) and the driving shaft (52) for cooperating with the trigger structure to cause the inner cylinder (1) to produce a vibration effect; When the driving shaft (52) rotates, the rotating shaft (51) rotates together, and the rotating shaft (51) can also move relative to the driving shaft (52), so that in the process of synchronously driving the screen drum (3) to rotate, the inner drum (1) can be driven to vibrate along its axial direction.

2. The rapid drying device for resin sand mixed with an antistatic agent according to claim 1, characterized in that: The inner side of the outer cylinder (2) comprises an inner liner (12) sleeved on the inner cylinder (1), an internal gap (121) being left between the inner liner (12) and the inner cylinder (1), and the outer side of the outer cylinder (2) comprises an outer liner (13) sleeved on the outer cylinder (2), an external gap (131) being left between the outer liner (13) and the outer cylinder (2), and the internal gap (121) and the external gap (131) are connected by an air passage (14) extending to a feed fan (22).

3. The rapid drying device for resin sand mixed with an antistatic agent according to claim 2, characterized in that: The screw feeder (4) is arranged between the outer cylinder (2) and the inner container (12), the screw feeder (4) having a ring sleeve (41) extending in the direction of the screen cylinder (3), and a plurality of fixing rods (42) are fixedly connected between the screen cylinder (3) and the ring sleeve (41).

4. The rapid drying device for resin sand mixed with an antistatic agent according to claim 1, characterized in that: The trigger structure comprises a pressure-applying portion (411) uniformly distributed in the circumferential direction of a ring sleeve (41) around the screw feeder (4), and a pressure-receiving portion (412) uniformly distributed in the circumferential direction around the outer ring (62). When the screen drum (3) rotates following the driving shaft (52), the screw feeder (4) also rotates following the screen drum (3). Whenever the pressure-applying portion (411) passes the pressure-receiving portion (412), and under the action of a return spring (64), the outer ring (62) and the inner drum (1) continuously vibrate.

5. The rapid drying device for resin sand mixed with an antistatic agent according to claim 1, characterized in that: The trigger structure comprises an air-filling tube (513) arranged at an end of the rotating shaft (51) away from the driving shaft (52); the air-filling tube (513) is fixedly connected to the outer cylinder (2); the end of the rotating shaft (51) comprises a socket (5131) for inserting the air-filling tube (513); the rotating shaft (51) is also provided with a pressure relief port (5132) connected to the socket (5131); when the air-filling tube (513) is inflated toward the rotating shaft (51), the rotating shaft (51) moves relative to the driving shaft (52) under the thrust of the air pressure; when the air-filling tube (513) stops inflating, the air pressure is released from the pressure relief port (5132); as the air-filling tube (513) is intermittently inflated and under the action of the return spring (64), the rotating shaft (51) drives the inner cylinder (1) to continuously vibrate.

6. The rapid drying device for resin sand mixed with an antistatic agent according to claim 1, characterized in that: The rotating connecting member (7) comprises a baffle (71) fixed between the driving shaft (52) and the screen drum (3), and a tuyere (711) is provided at the connection between the baffle (71) and the screen drum (3) for allowing the airflow generated by the discharge fan (23) to flow along the conical surface of the screen drum (3).

7. A drying method of a rapid drying device for resin sand mixed with an antistatic agent, applied to the rapid drying device for resin sand mixed with an antistatic agent as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: S1, resin sand containing antistatic agent is fed into the inner cylinder (1) through the feed port (11); S2, introducing hot air flow toward the inner tube (1) through the feed fan (22) and the discharge fan (23), so that the resin sand moving and dispersed in the inner tube (1) is preliminarily dried; S3, the resin sand falling into the sieve drum (3) is rotated and screened by the sieve drum (3), and particles with small particle sizes pass through, while particles with large particle sizes remain in the sieve drum (3) and continue to be dried; S4, the large-sized particles slide down to the screw feeder (4) and continue to be dried by the hot air flow until the screw feeder (4) pushes the large-sized resin sand out from the discharge port (21), completing the final drying.

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