Air pre-cooling system and application in hot melt adhesive grinding pre-cooling

Abstract

The application provides an air precooling system and application in hot melt glue grinding precooling, and belongs to the technical field of air precooling. The air precooling system comprises a feeding system and a discharging barrel. A flow guide pipe is arranged in the discharging barrel, a cooling assembly is arranged in the flow guide pipe, a screening assembly is arranged on the outer side of the flow guide pipe, the cooling assembly can cool the gas entering the flow guide pipe, the screening assembly can screen the hot melt glue particles entering the discharging barrel, and the cooling assembly can adjust the flow of the cooling gas according to the weight of the hot melt glue particles on the screening assembly. The hot melt glue entering the feeding pipe can move along the spiral track of the screening disc, the screening of the hot melt glue particles is realized, the precooling and cooling time of the large hot melt glue particles is prolonged, the state of "hard outside and soft inside" caused by the short cooling time of the large hot melt glue particles is avoided, the uniformity of the cooling of the hot melt glue particles is improved, and the grinding quality is improved.

Description

Technical Field

[0001] This invention belongs to the field of air precooling technology, specifically relating to an air precooling system and its application in the precooling of hot melt adhesive powder. Background Technology

[0002] Air precooling is a technique that uses air to cool the product. Hot melt adhesive is an environmentally friendly chemical product. While solid at room temperature, hot melt adhesive becomes very viscous and fluid when heated. Therefore, precooling is necessary before grinding to prevent the adhesive from clumping together during the grinding process due to its stickiness.

[0003] Considering the good flowability of granular hot melt adhesives, which makes them easy to disperse and process evenly in grinding equipment, granular hot melt adhesives are often used for grinding. However, the size of granular hot melt adhesives varies, and the pre-cooling time differs for hot melt adhesive particles of different sizes. This leads to uneven cooling of hot melt adhesive particles during the pre-cooling process, which may cause larger hot melt adhesive particles to form a "hard on the outside and soft on the inside" state. As a result, the internal viscosity of the hot melt adhesive remains high, affecting the subsequent pulverization effect. In addition, during the pre-cooling process of hot melt adhesives, although the gas can cool the hot melt adhesive particles when it comes into contact with them, the temperature of the gas will also rise with use, affecting the overall pre-cooling effect and reducing work efficiency.

[0004] Therefore, in order to solve the above problems, an air precooling system is needed. Summary of the Invention

[0005] The purpose of this invention is to provide an air precooling system that addresses the problem in the prior art where the size of granular hot melt adhesive varies, and the precooling time differs for hot melt adhesive particles of different sizes. This results in uneven cooling of the hot melt adhesive particles during the precooling process, which may cause larger hot melt adhesive particles to form a "hard on the outside and soft on the inside" state, resulting in the hot melt adhesive still having high viscosity and affecting the subsequent pulverization effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An air precooling system includes an air supply system and a feeding hopper. The feeding hopper is equipped with a guide pipe, and the guide pipe is equipped with a cooling component. The guide pipe is equipped with a screening component on its outer side. The cooling component can cool the gas entering the guide pipe, and the screening component can screen the hot melt adhesive particles entering the feeding hopper. The cooling component can adjust the flow rate of the cooling gas by the weight of the hot melt adhesive particles on the screening component.

[0008] Preferably, the cooling component includes an air inlet chamber, the bottom of which is fixedly connected to a guide pipe, and the bottom of which is fixedly connected to an exhaust chamber. The diameter of the guide pipe is smaller than the diameter of the air inlet chamber. When the gas inside the air inlet chamber enters the guide pipe, the gas flow rate increases and the pressure decreases, thereby cooling the gas.

[0009] Preferably, the top of the air intake chamber is provided with a movable plate, and a first elastic element is connected between the bottom of the movable plate and the inner wall of the air intake chamber. A connecting rod is provided on the inner side of the first elastic element. A sealing element is provided inside the exhaust chamber. The two ends of the connecting rod are fixedly connected to the sealing element and the movable plate, respectively. The connecting rod can move inside the guide pipe. The sealing element can seal the connection between the guide pipe and the exhaust chamber. Moving the connecting rod can adjust the distance between the sealing element and the guide pipe, and can adjust the gas flow rate of the guide pipe entering the exhaust chamber.

[0010] Preferably, the screening component includes a sliding sleeve, the outer wall of which is fixedly connected to a spirally arranged screening disc, the outer wall of which is slidably connected to the inner wall of the feeding barrel, and the screening disc is provided with multiple filter holes. The hot melt adhesive particles that enter the feeding barrel can move along the spiral trajectory on the screening disc and can be screened through the filter holes.

[0011] Preferably, the drain pipe includes a feed pipe, which is L-shaped and has one end passing through the feeding bucket and the other end fixedly connected to an installation pipe. The feed pipe has a feeding port inside and a filter screen fixedly connected inside to prevent hot melt adhesive particles from entering the installation pipe. Hot melt adhesive particles that enter the feed pipe can fall onto the screen plate through the feeding port.

[0012] Preferably, the outer walls of the air intake chamber and the exhaust chamber are fixedly connected to the inner wall of the mounting pipe, the outer wall of the movable plate is slidably connected to the inner wall of the mounting pipe, the inner wall of the exhaust chamber is provided with multiple sliding grooves, the inner wall of the mounting pipe is provided with limiting grooves that are the same number as the sliding grooves and corresponding in position, each limiting groove is slidably connected to a connector that is fixedly connected to the sealing member, and each connector is slidably connected to the inner wall of the corresponding sliding groove, the top of the sliding sleeve is fixedly connected to an adjusting sleeve that is slidably connected to the outer wall of the mounting pipe, and the end of each connector away from the sealing member is fixedly connected to the inner wall of the adjusting sleeve.

[0013] Preferably, the bottom of the mounting pipe is fixedly connected to an exhaust pipe, the outer wall of the exhaust pipe has multiple exhaust ports, the inner wall of the sliding sleeve is slidably connected to the outer wall of the exhaust pipe, and the outer wall of the sliding sleeve has multiple air outlets. The gas entering the exhaust pipe can pass through the exhaust ports and air outlets to blow air onto the hot melt adhesive particles on the screen tray.

[0014] Preferably, a vibrating element is fixedly connected to the bottom of the exhaust pipe, and a connecting sleeve that is slidably connected to the outer wall of the vibrating element is fixedly connected to the bottom of the sliding sleeve. The vibrating element has multiple receiving grooves inside, and multiple protrusions that are equidistantly distributed are fixedly connected inside each receiving groove. The inner side of the sliding sleeve is fixedly connected with limiting members that are the same number and position as the receiving grooves. Each limiting member is slidably connected to the inner wall of the corresponding receiving groove. Each limiting member has a chamber inside, and a squeezing member is slidably connected inside each chamber. A second elastic member is connected between the side of each squeezing member away from the vibrating element and the inner wall of the corresponding chamber. Moving the connecting sleeve allows the squeezing member to intermittently contact the protrusions inside the corresponding receiving groove, thereby generating vibration.

[0015] Preferably, the air supply system includes a fan, a feeding pipe and a feed inlet. The feeding pipe is connected to one end of the feed pipe that passes through the feeding hopper. The hot melt adhesive particles that enter the feeding pipe through the feed inlet can be blown into the interior of the feeding hopper by the fan.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. This invention incorporates a screening disc. Hot melt adhesive entering the feed pipe, upon reaching the discharge port, falls onto the screening disc and moves along its spiral path. During this process, smaller hot melt adhesive particles pass through the filter holes and fall directly to the bottom of the discharge hopper, while larger particles remain on the screening disc, thus achieving particle sieving. This movement of larger particles on the screening disc increases their pre-cooling time, preventing them from becoming "hard on the outside, soft on the inside" due to insufficient cooling. This improves the uniformity of cooling and enhances the overall crushing quality.

[0018] 2. This invention, through the setting of the guide pipe, allows the granular hot melt adhesive to flow into the feeding hopper via a fan and feeding pipe. Upon reaching the feeding port, it falls onto the sieve tray. Due to the high wind speed of the fan and the corresponding discharge ports of the feeding pipe and the inlet pipe, a large amount of airflow passes through the filter screen and enters the installation pipe. It then passes through the air inlet chamber and the guide pipe into the exhaust chamber. During this process, the gas flow rate increases, the pressure decreases, and the gas temperature drops. The cooled gas then enters the exhaust pipe, passes through the exhaust port and air outlet, and blows air onto the hot melt adhesive particles on the sieve tray. This further cools larger hot melt adhesive particles on the sieve tray, improving the overall pre-cooling effect and increasing work efficiency.

[0019] 3. This invention, through the adjustment sleeve and connecting sleeve, allows the screen to move downwards when the amount of hot melt adhesive particles on the screen becomes excessive. The sliding sleeve then moves the adjustment sleeve and connecting sleeve downwards simultaneously. During this downward movement, the adjustment sleeve disengages the sealing element from the connection between the guide pipe and the exhaust chamber, and adjusts the gap between the sealing element and the guide pipe, thus regulating the gas flow rate into the exhaust chamber. This allows the cooling component to automatically adjust its gas emission based on the amount of hot melt adhesive particles on the screen, preventing excessive particles from affecting the pre-cooling effect. During the downward movement of the connecting sleeve, the extrusion element intermittently contacts the protrusions inside the corresponding receiving groove, generating vibration. This vibration is transmitted to the screen, causing the hot melt adhesive particles on the screen to vibrate, effectively preventing clogging of the screen's filter holes and improving the screening effect. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a schematic diagram of the overall structure of the air precooling system of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the feeding hopper of the present invention;

[0023] Figure 3 This is a schematic diagram of the internal structure of the feeding hopper of the present invention;

[0024] Figure 4 This is a schematic diagram of the screening component and drainage tube of the present invention;

[0025] Figure 5 This is a cross-sectional view of the screening component and drainage tube of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the screening disc of the present invention;

[0027] Figure 7 This is a schematic diagram of the exhaust pipe structure of the present invention;

[0028] Figure 8 This is a schematic diagram of the cooling component and adjusting sleeve of the present invention;

[0029] Figure 9 This is a schematic diagram of the overall structure of the cooling component of the present invention;

[0030] Figure 10 This is a schematic diagram of the internal structure of the cooling component of the present invention;

[0031] Figure 11 This is a schematic diagram of the structure of the adjusting sleeve of the present invention;

[0032] Figure 12 This is a schematic diagram of the internal structure of the adjusting sleeve of the present invention;

[0033] Figure 13 This is a schematic diagram of the adjusting sleeve and vibration element of the present invention.

[0034] In the diagram: 1. Air supply system; 11. Fan; 12. Feeding pipe; 13. Inlet; 2. Discharge hopper; 3. Drainage pipe; 31. Inlet pipe; 32. Installation pipe; 33. Discharge port; 34. Filter screen; 35. Limiting groove; 36. Exhaust pipe; 37. Exhaust port; 38. Vibrating component; 39. Receiving groove; 310. Protrusion; 4. Cooling component; 41. Air inlet chamber; 42. Guide pipe; 43. Exhaust chamber; 44. Movable plate; 45. First elastic component; 46. Connecting rod; 47. Sealing component; 48. Slide groove; 49. Connecting component; 5. Screening component; 51. Sliding sleeve; 52. Screening disc; 53. Filter hole; 54. Adjusting sleeve; 55. Air outlet; 56. Connecting sleeve; 57. Limiting component; 58. Chamber; 59. Extrusion component; 510. Second elastic component. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1

[0037] Existing hot melt adhesive grinding methods often use granular hot melt adhesive for grinding. However, the size of granular hot melt adhesive varies, and the pre-cooling time is also different for hot melt adhesive particles of different sizes. This results in uneven cooling of hot melt adhesive particles during the pre-cooling process, which may cause larger hot melt adhesive particles to form a "hard on the outside and soft on the inside" state. As a result, the internal viscosity of the hot melt adhesive is still high, which affects the subsequent grinding effect.

[0038] Please see Figures 1 to 6 The present invention provides the following technical solution: an air precooling system, including an air supply system 1 and a feeding barrel 2. The feeding barrel 2 is provided with a guide pipe 3, and the guide pipe 3 is provided with a cooling component 4. The outside of the guide pipe 3 is provided with a screening component 5. The cooling component 4 can cool the gas entering the guide pipe 3, and the screening component 5 can screen the hot melt adhesive particles entering the feeding barrel 2. The cooling component 4 can adjust the cooling gas flow rate by the weight of the hot melt adhesive particles on the screening component 5.

[0039] like Figure 6As shown, the screening component 5 includes a sliding sleeve 51, and a spirally arranged screening disc 52 is fixedly connected to the outer wall of the sliding sleeve 51. The outer wall of the screening disc 52 is slidably connected to the inner wall of the feeding barrel 2. The screening disc 52 is provided with multiple filter holes 53. The hot melt adhesive particles that enter the feeding barrel 2 can move along the spiral trajectory on the screening disc 52 and can be screened through the filter holes 53.

[0040] like Figure 4 As shown, the feed pipe 3 includes a feed pipe 31, which is L-shaped and has one end that passes through the feed hopper 2. The other end is fixedly connected to an installation pipe 32. The feed pipe 31 has a discharge port 33 inside. A filter screen 34 is fixedly connected inside the feed pipe 31 to prevent hot melt adhesive particles from entering the installation pipe 32. The hot melt adhesive particles that enter the feed pipe 31 can fall onto the screen plate 52 through the discharge port 33.

[0041] like Figure 7 As shown, the filter screen 34 is set on the side of the discharge port 33 away from the feed pipe 12. When the granular hot melt adhesive flows inside the feed pipe 31, it can be blocked by the filter screen 34 when it comes into contact with it, ensuring that the granular hot melt adhesive can only fall from the discharge port 33.

[0042] like Figure 1 As shown, the air supply system 1 includes a fan 11, a feeding pipe 12, and a feeding port 13. The feeding pipe 12 is connected to one end of the feeding pipe 31 that passes through the feeding barrel 2. The hot melt adhesive particles that enter the feeding pipe 12 through the feeding port 13 can be blown into the interior of the feeding barrel 2 by the fan 11. During this process, the hot melt adhesive particles can be cooled by the airflow blown out by the fan 11. The surface of the feeding barrel 2 is provided with multiple exhaust holes. The gas that enters the interior of the feeding barrel 2 can be discharged to the outside through the exhaust holes. This is the existing technology and will not be described in detail.

[0043] In actual use, the hot melt adhesive particles entering the feeding pipe 12 through the inlet 13 can be blown by the blower 11 into the feeding pipe 31 inside the discharge hopper 2. When the granular hot melt adhesive flows to the discharge port 33, it can fall onto the screen plate 52 through the discharge port 33 and move along the spiral trajectory of the screen plate 52. During this process, smaller hot melt adhesive particles can fall directly to the bottom of the discharge hopper 2 through the filter holes 53 for feeding, while larger hot melt adhesive particles will continue to move on the screen plate 52, thus achieving the screening of hot melt adhesive particles. In this way, the movement of larger hot melt adhesive particles on the screen plate 52 increases the pre-cooling time of larger hot melt adhesive particles, avoids the formation of a "hard outside and soft inside" state of larger hot melt adhesive particles, improves the uniformity of cooling of hot melt adhesive particles, and improves the crushing quality.

[0044] Based on actual usage needs, the number of turns and length of the spiral of the sieve disc 52 can be set to adjust the residence time of larger hot melt adhesive particles on the sieve disc 52. The size of the filter hole 53 can also be set to adapt to the screening of hot melt adhesive particles of different sizes.

[0045] In summary, by setting up a sieve disc 52, the hot melt adhesive entering the feed pipe 31 can fall onto the sieve disc 52 when it moves to the discharge port 33, and move along the spiral trajectory of the sieve disc 52. During this process, smaller hot melt adhesive particles can fall directly to the bottom of the discharge bucket 2 through the filter holes 53 for discharge, while larger hot melt adhesive particles are retained and continue to move on the sieve disc 52, thus achieving the screening of hot melt adhesive particles. Therefore, by moving the larger hot melt adhesive particles on the sieve disc 52, the pre-cooling time of the larger hot melt adhesive particles is increased, avoiding the "hard on the outside and soft on the inside" state caused by the short cooling time of the larger hot melt adhesive particles, improving the uniformity of the cooling of the hot melt adhesive particles, and improving the crushing quality.

[0046] Example 2

[0047] Based on the above embodiments, during the movement of hot melt adhesive particles inside the feeding pipe, although the gas from the fan can cool the hot melt adhesive particles when it comes into contact with them, the temperature of the gas will also rise with use, resulting in a high temperature of the gas entering the feeding hopper. This makes it impossible to effectively and quickly cool the hot melt adhesive particles on the screen tray, affecting the overall pre-cooling effect and reducing work efficiency.

[0048] Please see Figures 3 to 10 The cooling component 4 includes an air inlet chamber 41, with a guide pipe 42 fixedly connected to the bottom of the air inlet chamber 41 and an exhaust chamber 43 fixedly connected to the bottom of the guide pipe 42. The diameter of the guide pipe 42 is smaller than the diameter of the air inlet chamber 41. When the gas inside the air inlet chamber 41 enters the guide pipe 42, the gas flow rate increases and the pressure decreases, thereby cooling the gas.

[0049] According to the principles of fluid mechanics, when the pipe diameter decreases, the gas velocity will increase accordingly. The increased velocity will reduce the gas pressure. During the process of pressure reduction, the gas needs to overcome flow resistance, which will lead to a decrease in the gas's internal energy, thereby reducing the temperature. Thus, reducing the gas pressure can achieve a reduction in gas temperature.

[0050] The bottom of the mounting pipe 32 is fixedly connected to the exhaust pipe 36. The outer wall of the exhaust pipe 36 has multiple exhaust ports 37. The inner wall of the sliding sleeve 51 is slidably connected to the outer wall of the exhaust pipe 36. The outer wall of the sliding sleeve 51 has multiple air outlets 55. The gas entering the exhaust pipe 36 can pass through the exhaust ports 37 and air outlets 55, and can blow air onto the hot melt adhesive particles on the screen plate 52.

[0051] During the process of sliding the sliding sleeve 51 up and down on the outer wall of the exhaust pipe 36, the exhaust port 37 is always inside the sliding sleeve 51. The purpose is to ensure that during the movement of the sliding sleeve 51, the gas entering the exhaust pipe 36 can always pass through the exhaust port 37 and the air outlet 55 to blow air and cool the hot melt adhesive particles on the screen plate 52.

[0052] In actual use, the hot melt adhesive particles entering the feeding pipe 12 through the inlet 13 are blown by the blower 11 into the inlet pipe 31 inside the discharge hopper 2. When the granular hot melt adhesive flows to the discharge port 33, it falls onto the screen plate 52. Due to the high wind speed of the blower 11 and the corresponding discharge ports of the inlet pipe 31 and the feeding pipe 12, a large amount of airflow passes through the filter screen 34 and enters the interior of the mounting pipe 32, and then enters the feed pipe 32 through the gap between the movable plate 44 and the mounting pipe 32. The gas enters the interior of the air chamber 41 and then flows into the exhaust chamber 43 through the guide pipe 42. During this process, the gas can increase its flow rate and reduce its pressure, thereby cooling the gas. The cooled gas can then enter the exhaust pipe 36 and pass through the exhaust port 37 and the air outlet 55. This allows the gas to blow air onto the hot melt adhesive particles on the screen plate 52, further cooling the larger hot melt adhesive particles on the screen plate 52, improving the overall pre-cooling effect and increasing work efficiency.

[0053] In summary, this invention, through the arrangement of the guide pipe 42, allows the granular hot melt adhesive to flow to the discharge port 33 when the material is fed into the discharge hopper 2 via the fan 11 and the feeding pipe 12. The granular hot melt adhesive then falls onto the screen plate 52. Due to the high wind speed of the fan 11 and the corresponding discharge ports of the feed pipe 12 and the inlet pipe 31, a large amount of airflow passes through the filter screen 34 and enters the installation pipe 32. Subsequently, it passes through the air inlet chamber 41 and the guide pipe 42 into the exhaust chamber 43. During this process, the gas flow rate increases, the pressure decreases, and the gas temperature drops. The cooled gas then enters the exhaust pipe 36 and passes through the exhaust port 37 and the air outlet 55, blowing air onto the hot melt adhesive particles on the screen plate 52. This further cools the larger hot melt adhesive particles on the screen plate 52, improving the overall pre-cooling effect and increasing work efficiency.

[0054] Example 3

[0055] Based on the above embodiments, with prolonged use, the granular hot melt adhesive will clog the filter holes on the sieve tray, affecting the sieving effect of the sieve tray, resulting in more hot melt adhesive particles on the sieve tray, which in turn affects the pre-cooling effect of the gas discharged from the vent on the hot melt adhesive particles on the sieve tray.

[0056] Please see Figures 5 to 13The top of the air intake chamber 41 is provided with a movable plate 44. The bottom of the movable plate 44 is connected to the inner wall of the air intake chamber 41 with a first elastic element 45. The inner side of the first elastic element 45 is provided with a connecting rod 46. The interior of the exhaust chamber 43 is provided with a sealing element 47. The two ends of the connecting rod 46 are fixedly connected to the sealing element 47 and the movable plate 44 respectively. The connecting rod 46 can move inside the guide pipe 42. The sealing element 47 can seal the connection between the guide pipe 42 and the exhaust chamber 43. Moving the connecting rod 46 can adjust the distance between the sealing element 47 and the guide pipe 42, and can adjust the gas flow rate of the guide pipe 42 into the exhaust chamber 43.

[0057] like Figures 8 to 10 As shown, the outer walls of the intake chamber 41 and the exhaust chamber 43 are fixedly connected to the inner wall of the mounting pipe 32. The outer wall of the movable plate 44 is slidably connected to the inner wall of the mounting pipe 32. The inner wall of the exhaust chamber 43 is provided with multiple sliding grooves 48. The inner wall of the mounting pipe 32 is provided with limiting grooves 35 that are the same number and position as the sliding grooves 48. Each limiting groove 35 is slidably connected to a connector 49 that is fixedly connected to the sealing member 47. Each connector 49 is slidably connected to the inner wall of the corresponding sliding groove 48. The top of the sliding sleeve 51 is fixedly connected to an adjusting sleeve 54 that is slidably connected to the outer wall of the mounting pipe 32. The end of each connector 49 away from the sealing member 47 is fixedly connected to the inner wall of the adjusting sleeve 54.

[0058] like Figure 13 As shown, a vibrating element 38 is fixedly connected to the bottom of the exhaust pipe 36, and a connecting sleeve 56 that is slidably connected to the outer wall of the vibrating element 38 is fixedly connected to the bottom of the sliding sleeve 51. The vibrating element 38 has multiple receiving grooves 39 inside, and multiple protrusions 310 that are equidistantly distributed are fixedly connected inside each receiving groove 39. The inner side of the sliding sleeve 51 is fixedly connected to limiting elements 57 that are the same number and position as the receiving grooves 39. Each limiting element 57 is slidably connected to the inner wall of the corresponding receiving groove 39. Each limiting element 57 has a chamber 58 inside, and a pressing element 59 is slidably connected inside each chamber 58. A second elastic element 510 is connected between the side of each pressing element 59 away from the vibrating element 38 and the inner wall of the corresponding chamber 58. The movable connecting sleeve 56 can make the pressing element 59 intermittently contact the protrusions 310 inside the corresponding receiving groove 39, which can generate vibration.

[0059] The limiting groove 35 is used to limit the movement distance of the adjusting sleeve 54. The adjusting sleeve 54 and the connecting sleeve 56 are slidably connected to the outer wall of the exhaust pipe 36. The inner wall of the sliding sleeve 51 is slidably connected to the outer wall of the vibrating element 38 and the mounting pipe 32. The purpose is to ensure that the adjusting sleeve 54 and the connecting sleeve 56 can move on the exhaust pipe 36, and the sliding sleeve 51 can move on the vibrating element 38 and the mounting pipe 32.

[0060] When the extruder 59 contacts the protrusion 310, the extruder 59 can move away from the protrusion 310 inside the corresponding chamber 58, and can compress the second elastic member 510. When the extruder 59 does not contact the protrusion 310, the second elastic member 510 elastically resets, which allows the extruder 59 to quickly contact and collide with the inner wall of the receiving groove 39. Thus, vibration is generated through the intermittent contact between the extruder 59 and the protrusion 310.

[0061] like Figure 10 As shown, the diameter of the connecting rod 46 is smaller than the inner diameter of the guide tube 42, and there is a gap between the connecting rod 46 and the guide tube 42. The space of the guide tube 42 can be further reduced by the connecting rod 46, the gas flow rate entering the guide tube 42 can be further increased, the gas pressure can be further reduced, and the gas can be further cooled.

[0062] It should be noted that under normal conditions, i.e., when there are no hot melt adhesive particles on the screening disc 52, the sealing member 47 can seal the connection between the guide pipe 42 and the exhaust chamber 43 under the action of the first elastic member 45. At this time, the connecting member 49 can contact the top inner wall of the corresponding sliding groove 48 and the limiting groove 35, and the limiting member 57 can contact the top inner wall of the receiving groove 39. During use, when the hot melt adhesive particles on the screening disc 52 increase, the screening disc 52 will move downward due to gravity, which can cause the sliding sleeve 51 to slide downward on the outer wall of the exhaust pipe 36, and drive the adjusting sleeve 54 and the connecting sleeve 56 to move downward synchronously. During the downward movement of the adjusting sleeve 54, it can drive the sealing member 47 to move downward through the connecting member 49, and drive the movable plate 44 to move downward through the connecting rod 46, which can compress the first elastic member 45. An elastic element 45 can disengage the sealing element 47 from the connection between the guide pipe 42 and the exhaust chamber 43, and can adjust the gap between the sealing element 47 and the guide pipe 42, thereby adjusting the gas flow rate of the guide pipe 42 into the exhaust chamber 43. Thus, the amount of hot melt adhesive particles on the screen plate 52 can be used to adjust the gas emission of the cooling component 4, preventing the hot melt adhesive particles on the screen plate 52 from affecting the pre-cooling effect. During the downward movement of the connecting sleeve 56, the extrusion element 59 can intermittently contact the protrusion 310 inside the corresponding receiving groove 39, generating vibration. The vibration is transmitted to the screen plate 52, causing the hot melt adhesive particles on the screen plate 52 to vibrate, effectively preventing the filter holes 53 of the screen plate 52 from becoming blocked, and improving the screening effect of the screen plate 52.

[0063] During the sliding process of the adjusting sleeve 54 on the outer wall of the mounting pipe 32, the limiting groove 35 is always inside the adjusting sleeve 54, in order to prevent the gas entering the exhaust chamber 43 from being discharged from the limiting groove 35.

[0064] In summary, this invention, through the adjustment sleeve 54 and connecting sleeve 56, allows the screen plate 52 to move downwards during use when the amount of hot melt adhesive particles on the screen plate 52 increases. The sliding sleeve 51 then drives the adjustment sleeve 54 and connecting sleeve 56 to move downwards simultaneously. During this downward movement, the adjustment sleeve 54 allows the sealing member 47 to disengage from the connection between the guide pipe 42 and the exhaust chamber 43, and it also adjusts the gap between the sealing member 47 and the guide pipe 42, thereby regulating the gas flow rate into the exhaust chamber 43. This allows for the... The amount of hot melt adhesive particles on the screening tray 52 is automatically adjusted by regulating the gas emission of the cooling component 4 to prevent the hot melt adhesive particles on the screening tray 52 from increasing and affecting the pre-cooling effect. During the downward movement of the connecting sleeve 56, the extrusion part 59 can intermittently contact the protrusion 310 inside the corresponding receiving groove 39, which can generate vibration. The vibration is transmitted to the screening tray 52, which can cause the hot melt adhesive particles on the screening tray 52 to vibrate, effectively preventing the filter holes 53 of the screening tray 52 from becoming blocked and improving the screening effect of the screening tray 52.

[0065] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An air precooling system, comprising an air supply system (1) and a feeding hopper (2), characterized in that: The feeding hopper (2) is provided with a diversion pipe (3), and a cooling component (4) is provided inside the diversion pipe (3). A screening component (5) is provided on the outside of the diversion pipe (3). The cooling component (4) can cool the gas entering the diversion pipe (3). The screening component (5) can screen the hot melt adhesive particles entering the feeding hopper (2). The cooling component (4) can adjust the flow rate of the cooling gas by the weight of the hot melt adhesive particles on the screening component (5). The cooling component (4) includes an air inlet chamber (41), the bottom of which is fixedly connected to a guide pipe (42), and the bottom of the guide pipe (42) is fixedly connected to an exhaust chamber (43). The diameter of the guide pipe (42) is smaller than the diameter of the air inlet chamber (41). When the gas inside the air inlet chamber (41) enters the guide pipe (42), the gas flow rate increases and the pressure decreases, thereby cooling the gas. The top of the air intake chamber (41) is provided with a movable plate (44). The bottom of the movable plate (44) is connected to the inner wall of the air intake chamber (41) with a first elastic element (45). The inner side of the first elastic element (45) is provided with a connecting rod (46). The interior of the exhaust chamber (43) is provided with a sealing element (47). The two ends of the connecting rod (46) are fixedly connected to the sealing element (47) and the movable plate (44) respectively. The connecting rod (46) can move inside the guide pipe (42). The sealing element (47) can seal the connection between the guide pipe (42) and the exhaust chamber (43). Moving the connecting rod (46) can adjust the distance between the sealing element (47) and the guide pipe (42) and adjust the gas flow rate of the guide pipe (42) into the exhaust chamber (43).

2. The air precooling system according to claim 1, characterized in that: The screening component (5) includes a sliding sleeve (51), and a spirally arranged screening disc (52) is fixedly connected to the outer wall of the sliding sleeve (51). The outer wall of the screening disc (52) is slidably connected to the inner wall of the feeding barrel (2). The screening disc (52) is provided with multiple filter holes (53). The hot melt adhesive particles that enter the feeding barrel (2) can move along the spiral trajectory on the screening disc (52) and can be screened through the filter holes (53).

3. The air precooling system according to claim 2, characterized in that: The drain pipe (3) includes a feed pipe (31), which is L-shaped and has one end passing through the feed bucket (2) and the other end is fixedly connected to an installation pipe (32). The feed pipe (31) has a discharge port (33) inside. The feed pipe (31) is fixedly connected to a filter screen (34) to prevent hot melt adhesive particles from entering the installation pipe (32). The hot melt adhesive particles that enter the feed pipe (31) can fall onto the screen plate (52) through the discharge port (33).

4. The air precooling system according to claim 3, characterized in that: The outer walls of the air intake chamber (41) and the exhaust chamber (43) are fixedly connected to the inner wall of the mounting pipe (32). The outer wall of the movable plate (44) is slidably connected to the inner wall of the mounting pipe (32). The inner wall of the exhaust chamber (43) is provided with multiple sliding grooves (48). The inner wall of the mounting pipe (32) is provided with limiting grooves (35) that are the same number and corresponding in position as the sliding grooves (48). Each limiting groove (35) is slidably connected to a connector (49) that is fixedly connected to the sealing member (47). Each connector (49) is slidably connected to the inner wall of the corresponding sliding groove (48). The top of the sliding sleeve (51) is fixedly connected to an adjusting sleeve (54) that is slidably connected to the outer wall of the mounting pipe (32). The end of each connector (49) away from the sealing member (47) is fixedly connected to the inner wall of the adjusting sleeve (54).

5. The air precooling system according to claim 4, characterized in that: The bottom of the mounting pipe (32) is fixedly connected to an exhaust pipe (36). The outer wall of the exhaust pipe (36) is provided with multiple exhaust ports (37). The inner wall of the sliding sleeve (51) is slidably connected to the outer wall of the exhaust pipe (36). The outer wall of the sliding sleeve (51) is provided with multiple air outlets (55). The gas entering the exhaust pipe (36) can pass through the exhaust ports (37) and air outlets (55) and blow air onto the hot melt adhesive particles on the screen plate (52).

6. The air precooling system according to claim 5, characterized in that: The bottom of the exhaust pipe (36) is fixedly connected to a vibrating element (38), and the bottom of the sliding sleeve (51) is fixedly connected to a connecting sleeve (56) that slides on the outer wall of the vibrating element (38). The vibrating element (38) has multiple receiving grooves (39) inside, and each receiving groove (39) has multiple protrusions (310) fixedly connected inside. The inner side of the sliding sleeve (51) is fixedly connected to a limiting element (57) that is the same number and position as the receiving grooves (39). Each limiting element (57) has multiple protrusions (310) that are evenly distributed inside. 7) All are slidably connected to the inner wall of the corresponding receiving groove (39). Each limiting member (57) has a cavity (58) inside. Each cavity (58) is slidably connected to a pressing member (59). A second elastic member (510) is connected between the side of each pressing member (59) away from the vibrating member (38) and the inner wall of the corresponding cavity (58). The movable connecting sleeve (56) can make the pressing member (59) intermittently contact the protrusion (310) inside the corresponding receiving groove (39) to generate vibration.

7. The air precooling system according to claim 6, characterized in that: The air supply system (1) includes a fan (11), a feeding pipe (12) and a feed inlet (13). The feeding pipe (12) and the feed pipe (31) are connected through one end of the feeding barrel (2). The hot melt adhesive particles that enter the feeding pipe (12) through the feed inlet (13) can be blown into the interior of the feeding barrel (2) by the fan (11).

8. The application of the air precooling system according to any one of claims 1-7 in the precooling of hot melt adhesive grinding.

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