Plastic particles need to be dehumidified and dried before injection molding to prevent bubbles from appearing in the plastic products. The existing dehumidification and drying equipment has two dehumidification devices, one is the silicone honeycomb runner, and the equipment structure uses this device. Complex, high energy consumption, and difficult to miniaturize; the other is molecular sieve. The equipment using this device has a simple structure, low energy consumption and is convenient for miniaturization. However, due to the strong moisture absorption capacity of molecular sieve, it is usually necessary to prevent it from being exposed to the air. The molecular sieve is injected into the container and then sealed by welding. When the molecular sieve fails and needs to be replaced, the entire container needs to be replaced, which is time-consuming, labor-intensive, and costly.
Technical realization elements:
The purpose of the present invention is to overcome the shortcomings of the prior art and provide a dehumidifying dryer that can easily replace the molecular sieve.
In order to achieve the above objective, the technical solution adopted by the present invention is a dehumidifying dryer, including:
The machine body, a vacuum hopper, a drying barrel, a high-precision dust filter element, a high temperature resistant dust filter element, a dehumidification device, a circulating fan, a feed fan, and a heating device arranged on the body;
The vacuum hopper is located above the drying barrel, the bottom of the vacuum hopper is connected to the drying barrel, the center of the top plate of the vacuum hopper is connected with an air inlet pipe, and the outer circumference of the vacuum hopper is close to the top plate of the vacuum hopper A feed pipe is connected to the air inlet, the end of the air inlet pipe away from the vacuum hopper is connected to the feed fan through the high-precision dust filter element, and the end of the feed pipe away from the vacuum hopper extends into In a bucket containing plastic particles;
A U-shaped tube is connected to the top plate of the drying barrel, and one end of the U-shaped tube away from the drying barrel is communicated with the air inlet of the circulating fan through the high temperature resistant dust filter element. The outer circumference of the drying barrel is A hot air duct is connected to the surface close to the top plate of the drying barrel, and one end of the hot air duct away from the drying barrel is connected to the air outlet of the circulating fan through the heating device, and the hot air duct extends into the drying barrel One end of the inner portion extends downward along the axis of the drying barrel, and a material quantity control device is provided at the outlet at the bottom of the drying barrel;
The dehumidification device includes a cylinder and a molecular sieve arranged in the cylinder. The cylinder includes a cylinder, an upper cover, and a lower cover. The cylinder body and the upper cover are detachably separated by a first clamp. Connection, the cylinder body and the lower cover are detachably connected by a second clamp, an upper sealing ring is arranged between the cylinder body and the upper cover, and a lower seal is arranged between the cylinder body and the lower cover A sealing ring, a compressed air source is connected at the center of the upper cover, and an air pipe leading to the air inlet of the circulating fan is connected at the center of the lower cover.
Preferably, the inner wall of the drying barrel is provided with heat-resistant insulation cotton.
Preferably, the end opening of the hot air duct extending into the drying barrel is a flared opening that opens downward, and there is a gap between the edge of the flared opening and the inner wall of the drying barrel for the plastic particles Through the gap.
Further preferably, the distance between the lower edge of the bell-shaped opening and the bottom outlet of the drying barrel is 10-15 cm.
Preferably, the vacuum hopper is provided with a full material switch and a material shortage switch, the full material switch is located at the upper part of the vacuum hopper, and the material shortage switch is located at the bottom of the vacuum hopper. When the full material switch When triggered, the feed fan is stopped, and when the lack of material switch is triggered, the feed fan is turned on.
Further preferably, when the lack of material switch is triggered, the feed fan is turned on for 50-80 seconds.
Further preferably, the full material switch and the shortage switch are both mechanical travel switches.
Preferably, the end of the U-shaped tube connected to the top plate of the drying barrel is provided with a filter screen for filtering the plastic particles.
Preferably, the material quantity control device includes a baffle slidably used to control the size of the outlet at the bottom of the drying barrel, and an air cylinder connected to one end of the baffle to drive the baffle to slide.
Preferably, the heating device includes a heating tube and a heating tube cylinder for accommodating the heating tube.
Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:
In the dehumidification dryer of the present invention, the cylinder body of the dehumidification device is set in a split structure with a cylinder body, an upper cover and a lower cover, and the cylinder body and the upper cover are detachably connected through the first clamp. The body and the lower cover are detachably connected through the second clamp, and the upper sealing ring provided between the cylinder body and the upper cover and the lower sealing ring provided between the cylinder body and the lower cover are sealed so that the The molecular sieve can be easily replaced, and can be kept isolated from the outside air.
Description of the drawings
Figure 1 is a schematic front view of the present invention;
Figure 2 is a schematic left view of the present invention;
Figure 3 is a schematic front view of the drying barrel of the present invention;
Figure 4 is a cross-sectional view in the direction of a-a in Figure 3;
Figure 5 is a three-dimensional schematic diagram of the drying barrel in the present invention;
Figure 6 is a schematic diagram of an axial cross-section of the dehumidification device of the present invention;
Among them: 100. Body; 200. Vacuum hopper; 201. Air inlet pipe; 202. Feed pipe; 203. Vacuum hopper top plate; 204. Full material switch; 205. Material shortage switch; 300. Drying barrel; 301. Drying barrel Top plate; 302. U-shaped pipe; 303. Hot air pipe; 304. Material control device; 305. High temperature resistant insulation cotton; 306. U-shaped pipe interface; 307. Hot air pipe interface; 308. Observation window; 309. Trumpet shape Opening; 400. High-precision dust filter element; 500. High temperature resistant dust filter element; 600. Dehumidification device; 601. Body; 602. Upper cover; 603. Lower cover; 604. First clamp; 605. Second card Hoop; 606. Upper sealing ring; 607. Lower sealing ring; 608. Molecular sieve; 700. Circulating fan; 800. Feeding fan; 900. Heating device; 901. Heating tube barrel.
Detailed ways
The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so that the protection scope of the present invention can be defined more clearly.
The up and down directions described in the present invention refer to the up and down directions in FIG. 1.
The present invention provides a dehumidification dryer, as shown in Figs. 1-2, comprising: a body 100, a vacuum hopper 200, a drying barrel 300, a high-precision dust filter element 400, a high-temperature-resistant dust filter element 500, and a vacuum hopper 200 arranged on the body 100. Dehumidification device 600, circulation fan 700, feed fan 800, heating device 900, wherein the vacuum hopper 200 is located above the drying barrel 300, the bottom of the vacuum hopper 200 is connected to the top of the drying barrel 300, and the vacuum hopper 200 and the drying barrel 300 are arranged between There are hinges and locks. When cleaning or overhauling the interior of the drying barrel 300 is required, the vacuum hopper 200 can be removed from the drying barrel 300. The inside of the vacuum hopper 200 and the drying barrel 300 form a closed space. The vacuum hopper 200 It is used to hold the plastic particles to be dried and dehumidified. The drying barrel 300 is the main place for dehumidifying and drying the plastic particles. The center of the top plate 203 of the vacuum hopper is connected with an air inlet pipe 201, and the end of the air inlet pipe 201 away from the vacuum hopper 200 passes through The high-precision dust filter element 400 is connected to the feed fan 800. The outer circumference of the vacuum hopper 200 is close to the top plate 203 of the vacuum hopper, and a feed pipe 202 is connected. The end of the feed pipe 202 away from the vacuum hopper 200 extends into the plastic particles. Inside the barrel, a full switch 204 and a lack switch 205 are arranged inside the vacuum hopper 200. The full switch 204 is located at the upper part of the vacuum hopper 200, and the lack switch 205 is located at the bottom of the vacuum hopper 200. When the full switch 204 is triggered, The feeding fan 800 stops. When the shortage switch 205 is triggered, the feeding fan 800 is turned on for 50-80s. When the feeding fan 800 is turned on, negative pressure is formed in the vacuum hopper 200, and plastic particles are sucked into the vacuum hopper 200 by the feeding pipe 202. Inside, the dust in the plastic particles passes through the air inlet pipe 201 and is adsorbed by the high-precision dust filter element 400, which greatly reduces the amount of dust in the vacuum hopper 200. In order to ensure that the full material switch 204 and the shortage switch 205 are not triggered by mistake, the material is full. The switch 204 and the lack of material switch 205 all use mechanical travel switches;
The top of the drying barrel 300 has a drying barrel top plate 301. The drying barrel top plate 301 is connected to a U-shaped tube 302 through a U-shaped tube interface 306. The end of the U-shaped tube 302 away from the drying barrel 300 passes through the high-temperature dust filter element 500 and the circulating fan 700. The air inlet is connected. The outer circumference of the drying barrel 300 is close to the top plate 301 of the drying barrel, and a hot air pipe 303 is connected through the hot air pipe interface 307. After connection, the hot air pipe interface 307 becomes a part of the hot air pipe 303, and the outer circumference of the drying barrel 300 There is also an observation window 308 for observing the inside of the drying barrel 300. The end of the hot air pipe 303 away from the drying barrel 300 is connected to the air outlet of the circulating fan 700 through the heating device 900. When the circulating fan 700 is started, the inside of the drying barrel 300 The air flows through the U-shaped tube 302, the high-temperature resistant dust filter element 500, the circulating fan 700, the heating device 900, and the hot air pipe 303 in sequence. When the air in the drying barrel 300 circulates, the plastic particles are blocked by the filter mesh inside the drying barrel 300. The high temperature dust filter element 500 is used to filter the small amount of dust remaining in the drying barrel 300 and pass through the drying barrel 300. The air circulates and drives the dust to flow through the high-temperature resistant dust filter element 500 to be adsorbed. The heating device 900 is used to heat the air flowing through the heating device 900. The heating device 900 includes a heating tube and a heating tube cylinder for accommodating the heating tube. 901, the heating tube cylinder 901 is a sealed cylinder, which has an upper opening connected to the hot air pipe 303 and a lower opening connected to the air outlet of the circulating fan 700. The hot air pipe 303 extends into the drying barrel 300 along one end of the drying barrel. The axial direction of the horn 300 extends downward and forms a downwardly flared horn-shaped opening 309. There is a gap between the edge of the horn-shaped opening 309 and the inner wall of the drying barrel 300 for plastic particles to pass through. The distance between the outlets at the bottom of the barrel 300 has a certain impact on the load of the circulating fan 700 and the dehumidification and drying effect of the plastic particles in the drying barrel 300. When the distance is too large, a large number of plastic particles are located under the horn-shaped opening 309, which cannot be effectively performed. Dehumidification and drying. When the distance is too small, plastic particles accumulate above the horn-shaped opening 309, which hinders the air circulation in the drying barrel 300, which increases the load of the circulating fan 700 to ensure the dehumidification and drying effect of the plastic particles in the drying barrel 300 And appropriately reduce the load of the circulating fan 700, the preferred range of the distance is 10-15cm, in this embodiment, the distance is 12cm, the bottom of the drying barrel 300 is provided with a material volume control device 304 for controlling the discharge volume of the drying barrel 300 The material quantity control device 304 includes a slidable baffle for controlling the size of the outlet at the bottom of the drying barrel 300, and a cylinder connected to one end of the baffle to drive the baffle to slide. The inner wall of the drying barrel 300 is also covered with a layer of 1cm thick The heat-resistant insulation cotton prevents the temperature in the drying barrel 300 from spreading, and prevents the noise in the drying barrel 300 from being transmitted to the external environment. It reduces the impact of plastic particles when they hit the inner wall of the drying barrel 300 and prevents the plastic particles from being Crushed dust generated after impact;
The dehumidification device 600 includes a cylinder and a molecular sieve 608 arranged inside the cylinder. The cylinder 601 includes a cylinder 601, an upper cover 602, and a lower cover 603. The upper cover 602 is located above the cylinder 601, and the lower cover 603 is located below the cylinder 601. The cylinder body 601 and the upper cover 602 are detachably connected by a first clamp 604, an upper sealing ring 606 for sealing is provided between the cylinder body 601 and the upper cover 602, and a first sealing ring 606 is provided between the cylinder body 601 and the lower cover 603. The two clamps 605 are detachably connected. A lower sealing ring 607 for sealing is provided between the cylinder body 601 and the lower cover 603. The center of the upper cover 603 is connected with a compressed air source, and the center of the lower cover 604 is connected to the circulation The air pipe at the air inlet of the fan 700 turns on the compressed air source when the circulating fan 700 is turned on. The compressed air dehumidified by the molecular sieve 608 enters the air inlet of the circulating fan 700 through the air pipe, and is driven by the circulating fan 700 to The plastic particles are dehumidified. When the molecular sieve 608 inside the cylinder is replaced, the cylinder 601 can be removed by opening the first clamp 604 and the second clamp 605, so that the molecular sieve 608 can be replaced.
By setting the cylinder of the dehumidification device 600 into a split structure with a cylinder 601, an upper cover 602, and a lower cover 603, and the cylinder 601 and the upper cover 602 are detachably connected through the first clamp 604, the cylinder The body 601 and the lower cover 603 are detachably connected by a second clamp 605, through the upper sealing ring 606 provided between the cylinder body 601 and the upper cover 602, and the lower sealing ring provided between the cylinder body 601 and the lower cover 603 607 is sealed, so that the molecular sieve 608 located in the cylinder can be easily replaced, and can be kept isolated from the outside air.
The above-mentioned embodiments are only to illustrate the technical concept and features of the present invention, and their purpose is to enable those familiar with the technology to understand the content of the present invention and implement them accordingly, and cannot limit the scope of protection of the present invention. The equivalent changes or modifications made by the spirit essence should all be covered by the protection scope of the present invention.
Technical features:
1. A dehumidifying dryer, characterized in that it comprises:
The machine body, a vacuum hopper, a drying barrel, a high-precision dust filter element, a high temperature resistant dust filter element, a dehumidification device, a circulating fan, a feed fan, and a heating device arranged on the body;
The vacuum hopper is located above the drying barrel, the bottom of the vacuum hopper is connected to the drying barrel, the center of the top plate of the vacuum hopper is connected with an air inlet pipe, and the outer circumference of the vacuum hopper is close to the top plate of the vacuum hopper A feed pipe is connected to the air inlet, the end of the air inlet pipe away from the vacuum hopper is connected to the feed fan through the high-precision dust filter element, and the end of the feed pipe away from the vacuum hopper extends into In a bucket containing plastic particles;
A U-shaped tube is connected to the top plate of the drying barrel, and one end of the U-shaped tube away from the drying barrel is communicated with the air inlet of the circulating fan through the high temperature resistant dust filter element. The outer circumference of the drying barrel is A hot air duct is connected to the surface close to the top plate of the drying barrel, and one end of the hot air duct away from the drying barrel is connected to the air outlet of the circulating fan through the heating device, and the hot air duct extends into the drying barrel One end of the inner portion extends downward along the axis of the drying barrel, and a material quantity control device is provided at the outlet at the bottom of the drying barrel;
The dehumidification device includes a cylinder and a molecular sieve arranged in the cylinder. The cylinder includes a cylinder, an upper cover, and a lower cover. The cylinder body and the upper cover are detachably separated by a first clamp. Connection, the cylinder body and the lower cover are detachably connected by a second clamp, an upper sealing ring is arranged between the cylinder body and the upper cover, and a lower seal is arranged between the cylinder body and the lower cover A sealing ring, a compressed air source is connected at the center of the upper cover, and an air pipe leading to the air inlet of the circulating fan is connected at the center of the lower cover.
2. The desiccant dryer according to claim 1, wherein the inner wall of the drying barrel is provided with heat-resistant thermal insulation cotton.
3. The dehumidification dryer according to claim 1, wherein the end opening of the hot air duct extending into the drying barrel is a downwardly flared horn-shaped opening, and the edge of the horn-shaped opening and There is a gap between the inner walls of the drying barrel for the plastic particles to pass through.
4. The desiccant dryer according to claim 3, wherein the distance between the lower edge of the bell-shaped opening and the bottom outlet of the drying barrel is 10-15 cm.
5. The desiccant dryer according to claim 1, characterized in that: a full material switch and a shortage switch are arranged in the vacuum hopper, the full material switch is located at the upper part of the vacuum hopper, and the shortage switch Located at the bottom of the vacuum hopper, when the full material switch is triggered, the feed fan stops, and when the lack of material switch is triggered, the feed fan turns on.
6. The dehumidifying dryer according to claim 5, characterized in that: when the lack of material switch is triggered, the feed fan is turned on for 50-80 seconds.
7. The dehumidifying dryer according to claim 5, wherein the full material switch and the shortage switch are both mechanical travel switches.
8. The desiccant dryer of claim 1, wherein the end of the U-shaped tube connected to the top plate of the drying barrel is provided with a filter screen for filtering the plastic particles.
9. The dehumidification dryer according to claim 1, wherein the material control device includes a baffle slidably used to control the size of the outlet at the bottom of the drying barrel, and one end of the baffle is connected to A cylinder that drives the baffle to slide.
10. The dehumidifying dryer according to claim 1, wherein the heating device comprises a heating tube and a heating tube cylinder for accommodating the heating tube.
The invention discloses a dehumidification dryer. The cylinder body of the dehumidification device is arranged in a split structure with a cylinder body, an upper cover, and a lower cover, and the cylinder body and the upper cover are detachably separated by a first clamp The connection, the cylinder body and the lower cover are detachably connected through the second clamp, and the upper sealing ring provided between the cylinder body and the upper cover and the lower sealing ring provided between the cylinder body and the lower cover are sealed so that the The molecular sieve in the cylinder can not only be replaced easily, but also can be kept isolated from the outside air.
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