Tunnel type sterilizing dryer

Abstract

The utility model discloses a tunnel type sterilizing dryer which comprises a tunnel type box body and a conveying mesh belt arranged in the box body, the tunnel type box body is sequentially provided with a preheating area, a heating area and a cooling area from front to back, the preheating area, the heating area and the cooling area are communicated with one another, a heating area shell is fixed in the heating area, and the conveying mesh belt is arranged in the box body. The conveying mesh belt penetrates through the heating area shell, three fan covers are sequentially arranged in an inner cavity of the heating area shell from front to back, and the heating area is divided into a front heating area, a middle heating area and a rear heating area by the three fan covers; the tunnel type sterilizing and drying machine has the advantages that the heating assemblies of the front heating area, the middle heating area and the rear heating area are respectively arranged on the rear fixing plate and the front fixing plate, so that a worker can conveniently maintain and replace the heating assemblies, and meanwhile, the temperature of the front heating area, the temperature of the middle heating area and the temperature of the rear heating area are respectively controlled; the sterilization effect is prevented from being influenced by overlarge temperature difference of the heating front area, the heating middle area and the heating rear area.

Description

Technical Field

[0001] The utility model relates to the technical field of food and medicine packaging machinery, in particular to a tunnel-type sterilizing and drying machine. Background Art

[0002] In the food and pharmaceutical packaging machinery industries, tunnel sterilization dryers are primarily used for drying, sterilizing, and removing pyrogens from pharmaceutical bottles. Based on their structure and function, dryers are divided into preheating, high-temperature, and cooling sections. The high-temperature section primarily transports bottles washed in a bottle dryer into a high-temperature oven for drying, sterilization, and pyrogen removal.

[0003] Chinese Patent Authorization Publication No.: CN 210718529 U discloses a tunnel-type sterilization oven, comprising an oven tunnel and a conveyor mesh belt, the conveyor mesh belt horizontally passing through the oven tunnel and being powered by a drive motor disposed below the oven tunnel; the oven tunnel is divided, from front to back, into an inlet zone, a heating zone, a cooling zone, and an outlet zone; a first high-efficiency filter is disposed above the inlet zone, the first high-efficiency filter being connected to a front laminar flow fan, which in turn is connected to a first medium-efficiency filter; a second high-efficiency filter is disposed above the cooling zone, the second high-efficiency filter being connected to a rear laminar flow fan, which in turn is connected to a second medium-efficiency filter; the heating zone is divided, from front to back, into a preheating zone, a high-temperature zone, and a cooling zone, each of which is provided with a varying number of electric heating tubes; temperature sensors are equidistantly disposed within the heating zone; an exhaust fan is disposed below the cooling zone, the exhaust fan being powered by a drive motor; and existing devices make it difficult to repair or replace the heating tubes.

[0004] Chinese Patent Authorization Announcement No.: CN 102241286 B discloses an oven with an online sterilization function for a tunnel-type sterilization dryer, comprising a box body and a hot air component, a conveyor mesh belt, and a heater installed in the box body. The hot air component is located above the conveyor mesh belt, and the air inlet end of the heater is connected to the bottom of the conveyor mesh belt through a return air channel. An air inlet chamber is formed between the air outlet end of the heater and the air inlet end of the hot air component. The box body is equipped with one or more sterilization gas generating devices, and the outlet of the sterilization gas generating device is connected to the air inlet chamber. The existing device has only one heater, which causes the entire oven to be at a single temperature, making it difficult to regulate the temperature at different positions in the oven. As a result, the temperature difference is too large when the conveyor mesh belt moves from the front heating zone to the middle heating zone and the rear heating zone, affecting the sterilization effect. Utility Model Content

[0005] In response to the above problems, the utility model proposes a tunnel-type sterilization dryer. By arranging the heating components of the front heating zone, the middle heating zone and the rear heating zone on the rear fixed plate and the front fixed plate respectively, it is convenient for staff to repair and replace the heating components. At the same time, the temperature of the front heating zone, the middle heating zone and the rear heating zone is controlled separately to avoid excessive temperature difference between the front heating zone, the middle heating zone and the rear heating zone that affects the sterilization effect.

[0006] The technical solutions adopted are:

[0007] A tunnel-type sterilizing and drying machine comprises a tunnel-type box body and a conveyor mesh belt arranged in the box body, wherein the tunnel-type box body is provided with a preheating zone, a heating zone and a cooling zone in sequence from front to back, and the preheating zone, the heating zone and the cooling zone are connected to each other, a heating zone shell is fixed inside the heating zone, the conveyor mesh belt passes through the heating zone shell, and an inner cavity of the heating zone shell is provided with three air hoods in sequence from front to back, the three air hoods are all arranged above the conveyor mesh belt and fixedly connected to the heating zone shell, the three air hoods divide the heating zone into a front heating zone, a middle heating zone and a rear heating zone, and each of the three air hoods is provided with a hot air blower on one side fixed to the heating zone shell, and an air inlet on the other opposite side; an opening is opened on the left side of the heating zone shell, a front fixing plate is hingedly connected to the front end of the opening, and a rear fixing plate is hingedly connected to the rear end, the opening covers the entire heating zone, a heating component of the front heating zone is fixed on the inner side of the front fixing plate, a heating component of the middle heating zone and a heating component of the rear heating zone are fixed on the inner side of the rear fixing plate, a primary filter is provided on the side of the box body opposite to the opening, the primary filter is located below the opening in the horizontal direction, and the primary filter is connected to the heating zone cavity.

[0008] As a further optimization of the technical solution of the present invention, a temperature sensor is respectively provided in the front heating zone, the middle heating zone and the rear heating zone, so as to accurately know the temperature changes of the front heating zone, the middle heating zone and the rear heating zone, thereby accurately controlling the temperature.

[0009] Further optimization of the technical solution of the present invention is that a PID controller for the front heating zone, a PID controller for the middle heating zone and a PID controller for the rear heating zone are provided on one side of the box body, the input end of the PID controller for the front heating zone is connected to the temperature sensor signal of the front heating zone, and the output end is electrically connected to the heating component of the front heating zone, the input end of the PID controller for the middle heating zone is connected to the temperature sensor signal of the middle heating zone, and the output end is electrically connected to the heating component of the middle heating zone, the input end of the PID controller for the rear heating zone is connected to the temperature sensor signal of the middle heating zone, and the output end is electrically connected to the heating component of the rear heating zone; it is used to respectively regulate the heating component of the front heating zone, the heating component of the middle heating zone and the heating component of the rear heating zone according to different temperature changes of the front heating zone, the middle heating zone and the rear heating zone, thereby respectively regulating the temperatures of the front heating zone, the middle heating zone and the rear heating zone to avoid the temperatures of the front heating zone, the middle heating zone and the rear heating zone being too low or too high.

[0010] In a further optimization of the technical solution of the present invention, the heating component of the heating front zone is a plurality of heating tubes fixed horizontally from top to bottom on the front fixed plate, and the plurality of heating tubes are electrically connected to the PID controller of the heating front zone; and are used to increase the heating area of ​​the heating component of the heating front zone on the front fixed plate.

[0011] In a further optimization of the technical solution of the present invention, the heating component of the heating center zone is a plurality of heating tubes, a part of the plurality of heating tubes is fixed horizontally from top to bottom in the middle of the rear fixed plate, and the other part is fixed vertically on the front side of the heating tube arranged horizontally in the middle, and the plurality of heating tubes is electrically connected to the PID controller of the heating center zone; it is used to increase the heating area of ​​the heating component of the heating center zone on the rear fixed plate as much as possible.

[0012] In a further optimization of the technical solution of the present invention, the heating component of the heating rear zone is arranged on the rear side of the heating component of the heating middle zone, and the heating component of the heating rear zone is a plurality of heating tubes fixed in a vertical direction on the rear fixed plate, and the plurality of heating tubes are electrically connected to the PID controller of the heating rear zone; and is used to increase the heating area of ​​the heating component of the heating rear zone on the rear fixed plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The utility model arranges the heating components of the front heating zone, the middle heating zone and the rear heating zone on the rear fixing plate and the front fixing plate respectively, so that the staff can easily repair and replace the heating components.

[0015] 2. The utility model increases the heating area on the rear fixing plate and the front fixing plate as much as possible and improves the heating efficiency by arranging the heating components of the front heating zone, the middle heating zone and the rear heating zone on the rear fixing plate. At the same time, it cooperates with the three-way PID controller to control the heating components of the front heating zone, the middle heating zone and the rear heating zone to achieve multi-stage temperature control of the front heating zone, the middle heating zone and the rear heating zone, thereby avoiding excessive temperature difference between the front heating zone, the middle heating zone and the rear heating zone to affect the sterilization effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the overall structure of this embodiment;

[0017] Figure 2 This is a cross-sectional view of the overall structure of this embodiment and the internal air flow direction;

[0018] Figure 3 This is a left side view of the overall structure of this embodiment;

[0019] Figure 4 It is a partial structural cross-sectional view of this embodiment;

[0020] Figure 5 It is a schematic diagram of the distribution of the heating components on the rear fixed plate;

[0021] Figure 6 is a schematic diagram of the heating assembly on the front fixing plate;

[0022] Explanation of the accompanying drawings: 1-box, 2-heating zone shell, 3-preheating zone, 4-heating zone, 5-cooling zone, 6-wind hood, 7-hot air blower, 8-air inlet, 9-primary filter, 10-conveying mesh belt, 21-rear fixed plate, 22-front fixed plate, 41-heating front zone, 42-heating middle zone, 43-heating rear zone, 211-heating component of heating middle zone, 212-heating component of heating rear zone, 221-heating component of heating front zone. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of this utility model more clear, the following Figure 1-6 And embodiments, the utility model is further described in detail. Example

[0024] like Figure 1-6 As shown, a tunnel-type sterilizing dryer of this embodiment includes a tunnel-type box body 1 and a conveyor mesh belt 10 arranged in the box body 1. The tunnel-type box body 1 is provided with a preheating zone 3, a heating zone 4 and a cooling zone 5 from front to back, and the heating zone 4 and the cooling zone 5 are interconnected.

[0025] A heating zone shell 2 is fixed at the heating zone 4, and a conveyor mesh belt 10 passes through the heating zone shell 2. The medicine bottles on the conveyor mesh belt 10 pass through the heating zone 4 to complete the drying and sterilization of the medicine bottles. Three wind hoods 6 are provided in sequence in the inner cavity of the heating zone shell 2 from front to back. The three wind hoods 6 are all arranged above the conveyor mesh belt 10 and fixedly connected to the heating zone shell 2. The openings of the three wind hoods 6 face the conveyor mesh belt 10. The three wind hoods 6 divide the heating zone 4 from front to back into a front heating zone 41, a middle heating zone 42 and a rear heating zone 43.

[0026] In this embodiment, the right sides of the three air covers 6 and the inner side wall of the heating zone housing 2 form an air duct that facilitates the flow of air in the inner cavity of the heating zone housing 2 .

[0027] An air inlet 8 is provided on the top of the left side of the three air hoods 6 on the side opposite to the heating zone shell 2, that is, the three air hoods 6. A hot air blower 7 is provided on the side where the three air hoods 6 are fixedly connected to the heating zone shell 2, that is, the right side of the three air hoods 6, respectively, for guiding the air in the inner cavity of the heating zone shell 2 through the air duct and into the air hood 6 from the air inlet 8 under the action of the hot air blower 7 to dry and sterilize the medicine bottles on the conveyor belt 10.

[0028] In this embodiment, a high-temperature and high-efficiency filter is provided at the opening of each of the three air hoods 6. The air in the air hood 6 is filtered by the high-temperature and high-efficiency filter and then used to dry and sterilize the medicine bottles on the conveyor belt 10, thereby reducing the contamination of the medicine bottles by the air.

[0029] like Figure 3 As shown, in this embodiment, an opening is opened on the left side of the heating zone housing 2, and the opening covers the entire heating zone 4. The rear end of the opening is hinged with a rear fixing plate 21, and the front end of the opening is hinged with a front fixing plate 22. When the rear fixing plate 21 and the front fixing plate 22 are closed on the opening, the front fixing plate 22 is opposite to the first wind shield 6 from the front to the rear, that is, the front fixing plate 22 is opposite to the heating front zone 41. A heating component 221 for the heating front zone is provided on the front fixing plate 22. The heating component 221 for the heating front zone is between the front fixing plate 22 and the heating front zone 41. The air flowing through is heated, and the rear fixed plate 21 is opposite to the second wind hood 6 and the third wind hood 6 from the front to the rear, that is, the rear fixed plate 21 is opposite to the heating middle zone 42 and the heating rear zone 43. The rear fixed plate 21 is fixed with a heating component 211 of the heating middle zone and a heating component 212 of the heating rear zone. The heating component 211 of the heating middle zone heats the air flowing through between the rear fixed plate 21 and the heating middle zone 42, and the heating component 212 of the heating rear zone heats the air flowing through between the rear fixed plate 21 and the heating rear zone 43.

[0030] In this embodiment, a primary filter 9 is fixed on the side of the box body 1 opposite to the opening. The primary filter 9 is located below the opening. The primary filter 9 is connected to the inner cavity of the heating zone shell 2. The external air enters the inner cavity of the heating zone shell 2 after being filtered by the primary filter 9.

[0031] like Figure 6 As shown, in this embodiment, the heating components 221 of the heating front zone are multiple heating tubes in a horizontal direction from top to bottom. The heating components 221 of the heating front zone cover the front fixed plate 22 as much as possible, so as to increase the heating area on the front fixed plate 22, thereby better heating the air between the front fixed plate 22 and the heating front zone 41.

[0032] At this time, under the action of the hot air blower 7 in the heating front zone 41, the air between the heating front zone 41 and the front fixed plate 22 enters the wind hood 6 through the air inlet 8 of the first wind hood 6 from front to back, flows through the high-temperature and high-efficiency filter, and performs preliminary drying and sterilization on the medicine bottles on the conveyor belt 10.

[0033] like Figure 5As shown, the heating assembly 211 of the heating center zone is composed of multiple horizontal heating tubes and multiple vertical heating tubes. The multiple horizontal heating tubes are fixed on the middle section of the rear fixed plate 21 from top to bottom. At the same time, the multiple horizontal heating tubes are stacked on the rear fixed plate 21 toward the heating center zone 42 through fixed brackets. The heating tubes stacked on different layers are staggered to cover the middle section of the rear fixed plate 21 as much as possible; the multiple vertical heating tubes are arranged in front of the multiple horizontal heating tubes, and the multiple vertical heating tubes are staggered. The heating assembly 211 of the heating center zone covers the left end and the middle section of the rear fixed plate 21 as much as possible to heat the air in the rear fixed plate 21 and the heating center zone 42. The superposition of multiple layers of heating tubes can also speed up the heating speed of the air.

[0034] Under the action of the hot air blower 7 in the heating middle area 42, the air between the heating middle area 42 and the rear fixed plate 21 enters the wind hood 6 through the air inlet 8 of the second wind hood 6 from front to back, flows through the high-temperature and high-efficiency filter, and further dries and sterilizes the medicine bottles on the conveyor belt 10.

[0035] The heating component 212 of the heating rear zone is arranged on the rear side of the heating component 211 of the heating middle zone. The heating component 212 of the heating rear zone is a plurality of vertical heating tubes. The plurality of vertical heating tubes are arranged on the rear side of the plurality of horizontal heating tubes of the heating component 211 of the heating middle zone, and are used to heat the air between the rear fixed plate 21 and the heating rear zone 43.

[0036] Under the action of the hot air blower 7 in the heating rear area 43, the air between the heating rear area 43 and the rear fixed plate 21 enters the wind hood 6 through the air inlet 8 of the third wind hood 6 from front to back, flows through the high-temperature and high-efficiency filter, and performs the final drying and sterilization on the medicine bottles on the conveyor belt 10.

[0037] In this embodiment, three temperature sensors are provided on the top of the heating zone shell 2 from front to back, specifically a temperature sensor for the front heating zone 41, a temperature sensor for the middle heating zone 42 and a temperature sensor for the rear heating zone 43. The temperature sensor for the front heating zone 41 corresponds to the area of ​​the front heating zone 41, the temperature sensor for the middle heating zone 42 corresponds to the area of ​​the middle heating zone 42, and the temperature sensor for the rear heating zone 43 corresponds to the area of ​​the rear heating zone 43; they are used to accurately monitor the temperatures of the front heating zone 41, the middle heating zone 42 and the rear heating zone 43.

[0038] In this embodiment, three PID heaters are also provided on one side of the box body 1, namely, a PID controller for the front heating zone 41, a PID controller for the middle heating zone 42 and a PID controller for the rear heating zone 43. The input end of the PID controller for the front heating zone 41 is connected to the temperature sensor signal of the front heating zone 41, and the output end is electrically connected to multiple heating tubes of the front heating zone 41. The input end of the PID controller for the middle heating zone 42 is connected to the temperature sensor signal of the middle heating zone 42, and the output end is electrically connected to multiple heating tubes of the middle heating zone 42. The input end of the PID controller for the rear heating zone 43 is connected to the temperature sensor signal of the middle heating zone 42, and the output end is electrically connected to multiple heating tubes of the rear heating zone 43. The precise control of the temperatures of the front heating zone 41, the middle heating zone 42 and the rear heating zone 43 is achieved through the cooperation between the three PID controllers, the three temperature sensors and the multiple heating tubes.

[0039] The specific method of using the tunnel-type sterilizing dryer of the present embodiment is as follows: when in use, the heating component 211 in the heating middle zone is controlled to make the temperature of the heating middle zone 42 reach the set threshold value, and the temperature of the heating rear zone 43 and the heating front zone 41 is observed to see whether they have reached the set threshold value. If not, the corresponding heating component is turned on for heating to make the temperature of the current zone reach the set threshold value, and the conveyor mesh belt 10 drives the medicine bottles on the conveyor mesh belt 10 to move from the preheating zone 3 to the heating zone 4 and then to the cooling zone 5. When the medicine bottles move from the preheating zone 3 to the heating front zone 41, the external air enters the inner cavity of the heating zone shell through the primary filter 9, and the air is heated by the heating component 221 in the heating front zone and enters the first air hood 6 from the front to the back through the air inlet 8 of the first air hood 6, and is passed through the high-temperature and high-efficiency The medicine bottles are initially dried and sterilized by filtering; the conveyor mesh belt 10 then transfers the medicine bottles from the front heating zone 41 to the middle heating zone 42. At this time, the air in the inner cavity of the heating zone shell is heated by the heating component 211 of the middle heating zone and enters the second air hood 6 from the front to the back through the air inlet 8 of the second air hood 6, and is filtered through a high-temperature and high-efficiency filter to further dry and sterilize the medicine bottles. When the conveyor mesh belt 10 drives the medicine bottles from the middle heating zone 42 to the rear heating zone 43, the air in the inner cavity of the heating zone shell is affected by the heating component 212 of the rear heating zone and enters the third air hood 6 from the front to the back through the air inlet 8 of the third air hood 6, and is filtered through a high-temperature and high-efficiency filter to dry and sterilize the medicine bottles, thereby avoiding excessive temperature difference between the front heating zone 41, the middle heating zone 42 and the rear heating zone 43 to affect the sterilization effect.

[0040] The above embodiments are only for illustrating the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the present invention.

Claims

1. A tunnel-type sterilizing dryer, comprising a tunnel-type box (1) and a conveyor mesh belt (10) arranged in the box (1), wherein the tunnel-type box (1) is provided with a preheating zone (3), a heating zone (4) and a cooling zone (5) in sequence from front to back, and the preheating zone (3), the heating zone (4) and the cooling zone (5) are interconnected, and is characterized in that: A heating zone shell (2) is fixed inside the heating zone (4), a conveying mesh belt (10) passes through the heating zone shell (2), and three wind hoods (6) are sequentially provided in the inner cavity of the heating zone shell (2) from front to back. The three wind hoods (6) are all arranged above the conveying mesh belt (10) and fixedly connected to the heating zone shell (2). The three wind hoods (6) divide the heating zone (4) into a front heating zone (41), a middle heating zone (42) and a rear heating zone (43). A hot air blower (7) is provided on one side where the three wind hoods (6) are fixed to the heating zone shell (2), and an air inlet (8) is provided on the other side opposite thereto. The left side of the heating zone shell (2) is provided with an opening, the front end of the opening is hingedly connected to a front fixing plate (22), and the rear end is hingedly connected to a rear fixing plate (21), and the opening covers the entire heating zone (4). A heating component (221) for heating the front zone is fixed on the inner side of the front fixing plate (22), and a heating component (211) for heating the middle zone and a heating component (212) for heating the rear zone are fixed on the inner side of the rear fixing plate (21). A primary filter (9) is provided on the side of the box (1) opposite to the opening. The primary filter (9) is located below the opening in the horizontal direction, and the primary filter (9) is communicated with the cavity of the heating zone (4).

2. A tunnel-type sterilizing and drying machine according to claim 1, characterized in that: A temperature sensor is provided in each of the heating front zone (41), the heating middle zone (42) and the heating rear zone (43).

3. The tunnel-type sterilizing and drying machine according to claim 2, characterized in that: A PID controller for a front heating zone (41), a PID controller for a middle heating zone (42), and a PID controller for a rear heating zone (43) are provided on one side of the box body (1). The input end of the PID controller for the front heating zone (41) is connected to the temperature sensor signal of the front heating zone (41), and the output end is electrically connected to the heating component (221) of the front heating zone. The input end of the PID controller for the middle heating zone (42) is connected to the temperature sensor signal of the middle heating zone (42), and the output end is electrically connected to the heating component (211) of the middle heating zone. The input end of the PID controller for the rear heating zone (43) is connected to the temperature sensor signal of the middle heating zone (42), and the output end is electrically connected to the heating component (212) of the rear heating zone.

4. The tunnel-type sterilizing and drying machine according to claim 3, characterized in that: The heating assembly (221) of the heating front zone is a plurality of heating tubes fixed on the front fixing plate (22) in a horizontal direction from top to bottom, and the plurality of heating tubes are electrically connected to the PID controller of the heating front zone (41).

5. The tunnel-type sterilizing and drying machine according to claim 4, characterized in that: The heating assembly (211) of the central heating zone comprises a plurality of heating tubes, a portion of which is fixed horizontally from top to bottom in the middle of the rear fixing plate (21), and another portion is fixed vertically in front of the central horizontally arranged heating tube. The plurality of heating tubes are electrically connected to a PID controller of the central heating zone (42).

6. The tunnel-type sterilizing and drying machine according to claim 5, characterized in that: The heating assembly (212) for heating the rear zone is arranged on the rear side of the heating assembly (211) for heating the middle zone. The heating assembly (212) for heating the rear zone comprises a plurality of heating tubes fixed in a vertical direction on the rear fixing plate (21). The plurality of heating tubes are electrically connected to a PID controller for heating the rear zone (43).

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