CN113899187B - Air pressure balance control method for tunnel type sterilization dryer and tunnel type sterilization dryer - Google Patents
Air pressure balance control method for tunnel type sterilization dryer and tunnel type sterilization dryer Download PDFInfo
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- CN113899187B CN113899187B CN202111370111.8A CN202111370111A CN113899187B CN 113899187 B CN113899187 B CN 113899187B CN 202111370111 A CN202111370111 A CN 202111370111A CN 113899187 B CN113899187 B CN 113899187B
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- 230000001954 sterilising effect Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 252
- 238000010438 heat treatment Methods 0.000 claims abstract description 135
- 239000003814 drug Substances 0.000 claims abstract description 53
- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 abstract description 11
- 238000001035 drying Methods 0.000 description 44
- 238000005406 washing Methods 0.000 description 42
- 238000004519 manufacturing process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
- F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
- F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/04—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/10—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/02—Applications of driving mechanisms, not covered by another subclass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Drying Of Solid Materials (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
Abstract
The invention discloses a tunnel type sterilization dryer and a wind pressure balance control method thereof, wherein the method reduces the air intake of a corresponding functional section according to the arrival position of a first bottle of a container medicine bottle queue, and increases the air intake of the corresponding functional section according to the arrival position of a tail bottle of the container medicine bottle queue, thereby ensuring that the pressure in each functional section is kept unchanged in the working process, realizing that the pressure of the whole machine can be balanced when the outside fluctuates, and the tunnel type sterilization dryer is provided with an adjustable air intake fan assembly, an adjustable exhaust fan assembly and a pressure gradient monitoring unit at each of a preheating section, a heating section and a cooling section, thereby being capable of respectively and independently controlling the pressure conditions of the preheating section and the cooling section. The invention can respectively adjust the air intake of the preheating fan and the cooling fan, thereby accurately adjusting the pressure gradient of each functional section and realizing the accurate control of the air pressure balance of the whole machine when the outside fluctuates.
Description
Technical Field
The invention relates to the field of food and medicine production, in particular to a tunnel type sterilization dryer and a wind pressure balance control method thereof.
Background
The structure of the existing tunnel type sterilization dryer is shown in figure 1, and comprises a preheating section, a heating section and a cooling section which are connected in sequence in a washing and drying room, and preheating exhaust air and cooling exhaust air are melted through a pipeline and then exhausted by sharing one exhaust fan. In order to ensure that the three functional segments can each function, it is usually necessary to maintain a certain pressure gradient, typically 1-2pa, between the segments, and if the pressure is unbalanced, the following will occur: when the pressure of the preheating section is lower than that of the heating section by 1-2pa, hot air of the heating section is filled into the preheating section, so that the temperature of the preheating section is increased, the performance and the service life of the high-efficiency preheating filter can be influenced, when the pressure of the hot air of the heating section is reduced after the hot air flows to the preheating section, cold air of the cooling section is also filled into the heating section, and the sterilization and heat source removal effects of the heating section are influenced. On the contrary, if the pressure in the preheating section is higher than that in the heating section, the air in the preheating section flows into the heating section, and then the pressure in the heating section is increased to cause the hot air to flow into the cooling section, thereby affecting the cooling effect of the cooling section.
When the exhaust fan air discharge capacity of cooling zone was adjusted to prior art, the pressure of preheating section and cooling zone risees simultaneously and reduces, and the exhaust fan is located the cooling zone bottom (the exhaust fan inlet scoop is inconsistent apart from the distance of preheating the air exit and cooling air exit), so the regulation to the pressure gradient of each functional section is difficult to control, prior art's preheating fan in addition, cooling fan is the fixed frequency operation, preheating fan promptly, the cooling fan air discharge capacity is the definite value, can't adjust, it is relatively difficult to synthesize to lead to complete machine wind pressure balance to control when the external world takes place to fluctuate.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems in the prior art, the invention provides a tunnel type sterilization dryer and a wind pressure balance control method thereof, which can respectively adjust the air exhaust volume of a preheating fan and a cooling fan, thereby accurately adjusting the pressure gradient of each functional section and realizing the accurate control of the wind pressure balance of the whole machine when the outside fluctuates.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a wind pressure balance control method for a tunnel type sterilization dryer comprises the following steps:
s1) adjusting the air intake of each functional section to enable the pressure gradient value of each functional section relative to the outside to be within a preset threshold range, and taking the air intake of each functional section at the moment as an initial value;
s2) if the bottles are fed, reducing the air intake of the corresponding functional section according to the position of the first bottle of the container medicine bottle queue reaching the preheating section or the cooling section until the pressure gradient value of the functional section relative to the outside is within a preset threshold range;
s3) in the tail bottle emptying stage, according to the position of the tail bottles of the container medicine bottle queue reaching the preheating section or the cooling section, increasing the air intake of the corresponding functional section until the gradient value of the pressure of the functional section relative to the outside is within a preset threshold range, and after the container medicine bottles are emptied, restoring the air intake of each functional section to the initial value.
Further, the specific steps of step S1) include:
acquiring a pressure gradient value of the preheating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset first threshold range, adjusting the air inlet volume of the preheating section until the pressure gradient value is within the preset first threshold range;
acquiring a pressure gradient value of the heating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset second threshold range, adjusting the air intake of the heating section until the pressure gradient value is in the preset second threshold range;
and obtaining a pressure gradient value of the cooling section of the functional section relative to the outside, and if the pressure gradient value is out of a preset third threshold range, adjusting the air inlet quantity of the cooling section until the pressure gradient value is in the preset third threshold range.
Further, the specific steps of step S2) include:
s21) before the first bottle of the container medicine bottle queue reaches the inlet of the heating section of the functional section, if the pressure gradient value of the preheating section relative to the outside is larger than a first upper limit value, reducing the air inlet quantity of the preheating section until the pressure gradient value is smaller than the first upper limit value;
s22) after the first bottle of the container medicine bottle queue reaches the inlet of the heating section of the functional section, and before the first bottle of the container medicine bottle queue reaches the inlet of the cooling section of the functional section, keeping the air intake of the preheating section, the heating section and the cooling section unchanged;
s23) after the first bottle of the container and medicine bottle queue reaches the inlet of the cooling section, if the pressure gradient value of the cooling section relative to the outside is larger than a second upper limit value, reducing the air intake of the cooling section until the pressure gradient value is smaller than the second upper limit value.
Further, the specific steps of step S3) include:
s31) after the tail bottle of the container medicine bottle queue reaches the inlet of the preheating section of the functional section, if the pressure gradient value of the preheating section of the functional section relative to the outside is smaller than a first lower limit value, increasing the air intake of the preheating section until the pressure gradient value is larger than the first lower limit value;
s32) after the tail bottles of the container medicine bottle queue reach the inlet of the cooling section of the functional section, if the pressure gradient value of the cooling section relative to the outside is smaller than a second lower limit value, increasing the air inlet quantity of the cooling section until the pressure gradient value is larger than the second lower limit value;
s33) after the tail bottles of the container and medicine bottle queue are emptied from the cooling section, the air intake of the preheating section and the cooling section is restored to the initial value.
The invention also provides a tunnel type sterilization dryer, which is used for executing any one of the tunnel type sterilization dryer wind pressure balance control methods, and comprises a preheating section, a heating section and a cooling section which are sequentially connected, and a control unit, wherein each of the preheating section, the heating section and the cooling section is provided with an adjustable air inlet fan assembly, an adjustable exhaust fan assembly and a pressure gradient monitoring unit, the output end of the pressure gradient monitoring unit is respectively connected with the input end of the control unit, and the control end of the exhaust fan assembly is respectively connected with the output end of the control unit, and the tunnel type sterilization dryer wind pressure balance control method is characterized in that:
the air inlet fan assembly comprises a first fan and a first frequency converter which are arranged in a corresponding preheating section or a heating section or a cooling section, the output end of the control unit is connected with the first fan through the first frequency converter, the exhaust fan assembly comprises a second fan and a second frequency converter which are arranged outside the corresponding preheating section or the heating section or the cooling section, and the output end of the control unit is connected with the second fan through the second frequency converter, so that the first frequency converter and the second frequency converter are controlled to adjust the rotating speed of the first fan and the rotating speed of the second fan, and the pressure gradient value of the preheating section or the heating section or the cooling section relative to the outside is changed.
Further, the preheating section includes first air intake and first exhaust duct, first air intake, first fan and exhaust duct arrange in proper order and form first wind channel, the second fan sets up on first exhaust duct.
Further, the heating section includes supply air inlet, return air frame and second exhaust duct, supply air inlet, first fan, return air frame arrange in proper order and form the circulation wind channel, return air frame and second exhaust duct intercommunication form the passageway of airing exhaust, the second fan sets up on second exhaust duct.
Further, the cooling section includes second air intake and third exhaust pipe, second air intake, first fan and third exhaust pipe arrange in proper order and form the second wind channel, the second fan sets up on third exhaust pipe.
Furthermore, the pressure gradient monitoring unit is a pressure transmitter, a first acquisition end of the pressure transmitter is arranged in the corresponding preheating section or heating section or cooling section, a second acquisition end of the pressure transmitter is arranged outside the corresponding preheating section or heating section or cooling section, and an output end of the pressure transmitter is connected with an input end of the control unit.
The invention also provides a wind pressure balance control system of the tunnel sterilizing dryer, which comprises:
the initial pressure adjusting unit is used for adjusting the air intake of each functional section, so that the pressure gradient value of each functional section relative to the outside is within a preset threshold range, and the air intake of each functional section at the moment is taken as an initial value;
the pressure reduction unit is used for reducing the air intake of the corresponding functional section according to the position of the first bottle of the container medicine bottle queue reaching the preheating section or the cooling section until the pressure gradient value of the preheating section or the cooling section relative to the outside is in a preset threshold range;
and the pressure lifting unit is used for increasing the air intake of the corresponding functional section after acquiring that the tail bottles of the container medicine bottle queue reach the position of the preheating section or the cooling section until the pressure gradient value of the preheating section or the cooling section relative to the outside is within a preset threshold range, and restoring the air intake of each functional section to an initial value after the container medicine bottles are emptied.
Compared with the prior art, the invention has the advantages that:
1. according to the arrival positions of the head bottle and the tail bottle of the container medicine bottle queue in the tunnel type sterilizing dryer, the air intake or exhaust volume of the preheating section and the cooling section is respectively adjusted in real time in combination with actual conditions, so that the pressure inside each functional section is kept unchanged, and the pressure of the whole machine can still be balanced when the outside fluctuates.
2. In the tunnel type sterilization dryer, the preheating section and the cooling section are respectively provided with the independent exhaust pipeline, the air inlet fan assembly and the exhaust fan assembly, so that the pressure conditions of the preheating section and the cooling section can be respectively and independently controlled, and the condition that the pressure of the two functional sections is simultaneously increased or reduced is avoided.
Drawings
Fig. 1 is a schematic structural view of a conventional tunnel sterilizing dryer.
Fig. 2 is a flowchart of a method according to a first embodiment of the invention.
Fig. 3 is a schematic structural view of a tunnel sterilizing dryer according to a second embodiment of the present invention.
Fig. 4 is an electrical schematic diagram of a tunnel sterilizing dryer according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a second preheating section according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a heating section according to a second embodiment of the present invention.
FIG. 7 is a schematic structural diagram of a second cooling stage according to an embodiment of the present invention.
Illustration of the drawings: 1-preheating section, 2-heating section, 3-cooling section, 4-container medicine bottle, 5-bottle conveying net belt, 11-preheating coarse-effect filter, 12-preheating laminar flow fan, 13-preheating fan cover, 14-preheating high-efficiency filter, 15-preheating box body, 16-preheating exhaust fan, 17-first exhaust pipeline, 21-high-temperature laminar flow fan, 22-heating component, 23-air supplement opening, 24-high-temperature box body, 25-air return frame, 26-high-temperature exhaust fan, 27-second exhaust pipeline, 28-high-temperature high-efficiency filter, 29-heating fan cover, 31-cooling laminar flow fan, 32-cooling section air inlet, 33-cooling section coarse-effect filter, 34-third exhaust pipeline, 35-cooling box body, 36-cooling high-efficiency filter, 37-cooling fan cover, 38-cooling fan, 40-preheating fan frequency converter, 41-cooling fan frequency converter, 42-preheating exhaust frequency converter, 43-preheating pressure transmitter, 44-cooling frequency converter, 45-high-temperature frequency converter, 46-control unit, 47-high-temperature pressure transmitter, and 48-cooling pressure transmitter.
Detailed Description
The invention is further described below with reference to the drawings and specific preferred embodiments of the description, without thereby limiting the scope of protection of the invention.
Example one
For the existing tunnel type sterilization dryer, the pressure difference condition of each working stage is analyzed as follows:
and (3) no-load phase analysis:
in no-load, because no bottle is arranged above the mesh belt, the heating inlet air brake SV1, the heating outlet air brake SV2 and the oven outlet air brake SV3 are closed, the pressure difference of each functional section is low, the pressure difference change is mostly only influenced by a preheating laminar flow fan, a high-temperature laminar flow fan and a cooling laminar flow fan, and the fluctuation is small.
Analysis of bottle feeding stage:
the bottle feeding stage is a process from no-load (no bottle on a mesh belt) to full load (a bottle is on the mesh belt), the heating inlet air brake SV1, the heating outlet air brake SV2 and the oven outlet air brake SV3 are closed to opened, and bottle feeding starts, and because the heating inlet air brake SV1 is closed, the bottle feeding blocks laminar air blown by a preheating laminar flow fan, so that the pressure difference between a preheating section and the heating section is gradually increased, and the pressure difference fluctuates; similarly, when entering the heating section and the cooling section, the pressure difference between the heating section and the cooling section is increased and becomes fluctuated; before the bottle enters the air brake SV3 at the outlet of the oven, when the air brake SV3 at the outlet of the oven is opened, the laminar flow air of the laminar flow fan blocked by the bottle and the air filled between the bottles enable the pressure difference of the cooling section to be larger than that of the heating section, so that the bottle does not accord with the control requirement.
Full load phase analysis:
during the full-load stage, the heating inlet air brake SV1, the heating outlet air brake SV2 and the oven outlet air brake SV3 are opened, the frequency of the laminar flow fan is not changed, most of the pressure difference is only influenced by the pressure difference between filling, and the pressure difference is stable.
Analysis of the tail bottle emptying stage:
the tail bottle emptying stage is a process from full load (bottle is on the mesh belt) to no load (no bottle is on the mesh belt), a heating inlet air brake SV1, a heating outlet air brake SV2 and an oven outlet air brake SV3 are opened to be closed.
When emptying begins, before a heating inlet air brake SV1 is opened, the preheating section begins to have no bottle, no bottle blocks laminar air blown down by a preheating laminar flow fan, so that the pressure difference between the preheating section and the heating section is gradually reduced, and the heating section and the cooling section are still in a full-load state (full of bottles), because the pressure of the heating section is greater than that of the preheating section and the cooling section, the air of the heating section flows to the preheating section, so that the pressure difference fluctuates; when the preheating section is completely empty of bottles, the heating inlet air brake SV1 is closed, and most factors influencing the pressure difference of the preheating section are changed into the rotating speed (air discharge quantity) of the preheating laminar flow fan. Similarly, when no bottle is arranged on the heating section and the cooling section, the pressure difference of the heating section and the cooling section is also reduced and becomes fluctuation; when the bottle leaves the air brake SV3 at the outlet of the drying oven, the air brake SV3 at the outlet of the drying oven is opened, the cooling section has no bottle to block laminar air of the laminar flow fan, only the air filled in the filling space is left to lead the differential pressure of the cooling section to fluctuate, and the differential pressure of the cooling section is reduced; when all bottles leave the air brake SV3 at the outlet of the oven, the air brake SV3 at the outlet of the oven is closed, and most of the influence factors of the pressure difference of the preheating section, the heating section and the cooling section are pressure difference fluctuation caused by the rotating speed (air exhaust amount) of the hot laminar flow fan, the high-temperature laminar flow fan and the cooling laminar flow fan.
Based on the analysis, the pressure difference of the preheating section, the heating section and the cooling section is in no-load state, the full-load stage is generally not changed, and the equipment pressure difference is stable as long as the pressure difference between the filling chamber and the bottle washing chamber is kept stable; during the production bottle feeding stage and the tail bottle emptying stage, the bottle feeding stage generates the fluctuation of the pressure difference due to the state transition of the bottle conveying process (from no-load to full-load) and the tail bottle emptying stage (from full-load to no-load). Therefore, pressure difference fluctuation in the bottle feeding stage and the tail bottle emptying stage is well handled, and good air pressure balance can be maintained.
For the analysis of the internal pressure conditions of the preheating section, the heating section and the cooling section in the working process, the embodiment provides a method for controlling the wind pressure balance of a tunnel type sterilization dryer, as shown in fig. 2, which includes the following steps:
s1) adjusting the air inlet volume of each functional section to ensure that the pressure gradient value of each functional section relative to the outside is in a preset threshold range, taking the air inlet volume and the air outlet volume of each functional section as initial values at the moment, specifically, respectively adjusting the air inlet volume of a preheating section, a heating section and a cooling section to ensure that the pressure gradient values of the preheating section, the heating section and the cooling section relative to a washing and drying room are in the preset threshold range, and taking the air inlet volume and the air outlet volume of the preheating section and the cooling section as initial values at the moment;
s2) according to the position that the first bottle of the container medicine bottle queue reaches the preheating section or the cooling section, reducing the air intake of the corresponding function section or increasing the air exhaust of the corresponding function section until the pressure gradient value of the function section relative to the outside is within a preset threshold range, specifically, after the first bottle of the container medicine bottle queue reaches the preheating section, reducing the air intake of the preheating section or increasing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying chamber is within the preset threshold range, and after the first bottle of the container medicine bottle queue reaches the cooling section, reducing the air intake of the cooling section or increasing the air exhaust of the cooling section relative to the washing and drying chamber until the pressure gradient value of the cooling section relative to the washing and drying chamber is within the preset threshold range;
and S3) increasing the air intake or reducing the air exhaust of the corresponding functional section according to the position of the tail bottles of the container medicine bottle queue reaching the preheating section or the cooling section until the pressure gradient value of the functional section relative to the outside is within a preset threshold range, recovering the air intake and the air exhaust of each functional section to initial values after the container medicine bottles are emptied, specifically, increasing the air intake or reducing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying room is within the preset threshold range after the tail bottles of the container medicine bottle queue reach the heating section, increasing the air intake or reducing the air exhaust of the cooling section until the pressure gradient value of the cooling section relative to the washing and drying room is within the preset threshold range after the tail bottles of the container medicine bottle queue reach the cooling section, and recovering the air intake and the air exhaust of the preheating section and the cooling section to initial values after the container medicine bottles are emptied from the cooling section.
Wherein, the specific steps of step S1) include:
acquiring a pressure gradient value of a relative washing and drying room of a preheating section, and if the pressure gradient value is out of a preset first threshold value range, adjusting the air inlet quantity of the preheating section until the pressure gradient value is within the preset first threshold value range, wherein the first threshold value range is 2-10pa in the embodiment;
acquiring a pressure gradient value of the heating section relative to the washing and drying room, and if the pressure gradient value is out of a preset second threshold value range, adjusting the air intake rate of the heating section until the pressure gradient value is within the preset second threshold value range, wherein the second threshold value range is 3-12pa in the embodiment;
and acquiring a pressure gradient value of the cooling section relative to the washing and drying room, and if the pressure gradient value is out of a preset third threshold range, adjusting the air intake of the cooling section until the pressure gradient value is in the preset third threshold range, wherein the third threshold range is 2-10pa in the embodiment.
After debugging is finished, the values of the air intake volume and the air exhaust volume of the preheating section, the heating section and the cooling section are used as initial values, wherein the air intake volume of the heating section is not changed any more, and the air pressure balance control of the tunnel type sterilization dryer is finished by adjusting the air intake volume and the air exhaust volume of the preheating section and the cooling section subsequently.
A bottle feeding stage:
when the bottle is conveyed to the preheating section and before the bottle reaches the SV1 air brake of the heating inlet, the pressure gradient between the preheating section and the washing and drying chamber is increased, only the air inlet amount of the preheating section is reduced or the air exhaust amount of the preheating section is increased, and the air inlet amount and the air exhaust amount of the heating section and the cooling section are kept unchanged;
when the bottle is transported to the heating section and before reaching the heating outlet air lock SV2, the pressure gradient between the heating section and the washing and drying is increased because the pressure difference is maintained as follows: the preheating section < the heating section > the cooling section, so that the air inlet volume and the air outlet volume of the preheating section, the heating section and the cooling section are kept unchanged without adjustment;
when the bottle is conveyed to the cooling section and before the bottle reaches an air brake SV3 at the outlet of the oven, the pressure gradient between the cooling section and the washing and drying chamber is increased, only the air inlet amount of the cooling section is reduced or the air exhaust amount of the cooling section is increased, and the air inlet amount and the air exhaust amount of the preheating section and the heating section are kept unchanged;
when the bottle is conveyed to the outlet of the oven and reaches the SV3 air brake at the outlet of the oven, the pressure gradient between the cooling section and the washing and drying section is increased under the influence of the pressure difference between the filling sections and the full-load state of the bottle, only the air intake of the cooling section is reduced or the air exhaust of the cooling section is increased, and the air intake and the air exhaust of the preheating section and the heating section are kept unchanged.
Therefore, the specific steps of step S2) in this embodiment include:
s21) before the first bottle of the container medicine bottle queue reaches the inlet of the heating section, if the pressure gradient value of the preheating section relative to the washing and drying room is larger than a first upper limit value, reducing the air inlet quantity of the preheating section or increasing the air outlet quantity of the preheating section until the pressure gradient value is smaller than the first upper limit value, wherein the first upper limit value in the embodiment is the upper limit value 10pa of a first threshold value area;
s22) after the first bottle of the container medicine bottle queue reaches the inlet of the heating section and before the first bottle reaches the inlet of the cooling section, keeping the air intake and the air exhaust of the preheating section, the heating section and the cooling section unchanged;
s23) after the first bottle of the container medicine bottle queue reaches the inlet of the cooling section, if the pressure gradient value of the cooling section relative to the washing and drying room is larger than a second upper limit value, reducing the air inlet amount of the cooling section or increasing the air exhaust amount of the cooling section until the pressure gradient value is smaller than the second upper limit value, wherein the second upper limit value in the embodiment is the upper limit value 10pa of the third threshold area.
And (3) tail bottle emptying stage:
when the bottle leaves the preheating section, the heating inlet air brake SV1 is closed, the pressure gradient between the preheating section and the washing and drying chamber is reduced, only the air inlet amount of the preheating section is increased or the air exhaust amount of the preheating section is reduced, and the air inlet amount and the air exhaust amount of the heating section and the cooling section are kept unchanged;
when the bottle is taken away from the heating section, the heating outlet air brake SV2 is closed, and the pressure gradient between the heating section and the washing and drying section is reduced, because the pressure difference can be kept as follows: the preheating section < the heating section > is greater than the cooling section, so that the air inlet volume and the air outlet volume of the preheating section, the heating section and the cooling section are kept unchanged without adjustment;
when the bottle is conveyed to the cooling section and the air brake SV3 at the outlet of the oven is opened, the pressure gradient between the cooling section and the washing and drying section is reduced, only the air inlet amount of the cooling section is increased or the air exhaust amount of the cooling section is reduced, and the air inlet amount and the air exhaust amount of the preheating section and the heating section are kept unchanged;
when the bottle is brought to the outlet of the oven and the air lock SV3 at the outlet of the oven is closed, the pressure gradient between the cooling section and the washing and drying chamber is reduced, only the air intake of the cooling section is increased or the air exhaust of the cooling section is reduced, the air intake and the air exhaust of the preheating section and the heating section are maintained unchanged, and after the air lock SV3 at the outlet of the oven is closed, the whole tunnel type sterilization dryer is restored to an idle state, so that when the pressure gradient between the cooling section and the washing and drying chamber returns to the third threshold range, the air intake and the air exhaust of the preheating section and the cooling section are restored to the initial values.
Therefore, the specific step of step S3) in this embodiment includes:
s31) after the tail bottles of the container medicine bottle queue reach the inlet of the preheating section, if the pressure gradient value of the preheating section relative to the washing and drying chamber is smaller than a first lower limit value, increasing the air intake of the preheating section or reducing the air exhaust of the preheating section until the pressure gradient value is larger than the first lower limit value, wherein the first lower limit value in the embodiment is the lower limit value 2pa of a first threshold area;
s32) after the tail bottles of the container medicine bottle queue reach the inlet of the cooling section, if the pressure gradient value of the cooling section relative to the washing and drying chamber is smaller than a second lower limit value, increasing the air intake quantity of the cooling section or reducing the air exhaust quantity of the cooling section until the pressure gradient value is larger than the second lower limit value, wherein the second lower limit value in the embodiment is the lower limit value 2pa of a third threshold area;
s33) after the tail bottles of the container and medicine bottle queue are emptied from the cooling section, the air intake and the air exhaust of the preheating section and the cooling section are restored to the initial values.
According to the steps, the arrival positions of the head bottle and the tail bottle of the container medicine bottle queue in the tunnel type sterilizing dryer are adjusted in real time by combining with actual conditions, the air intake or the air exhaust of the preheating section and the cooling section are adjusted in real time, so that the pressure inside each functional section is kept unchanged, the pressure of the whole machine can be still balanced when the outside fluctuates, the pressure difference fluctuation in the bottle feeding stage and the tail bottle emptying stage in production is avoided, and the operation functional effect of each section is prevented from being influenced and parts such as a filter are prevented from being damaged.
Example two
This embodiment provides a tunnel type sterilization desiccator based on embodiment one, as shown in fig. 3, including preheating section 1, heating section 2 and the cooling section 3 that connects gradually, the feed end of heating section 2 is provided with heating entry air brake SV1, and the discharge end of heating section 2 is provided with heating export air brake SV2, and the discharge end of cooling section 3 is provided with oven export air brake SV3. The bottle conveying net belt 5 drives the medicine bottles 4 of the container to sequentially pass through the preheating section 1, the heating section 2 and the cooling section 3 for sterilization.
As shown in fig. 4, the preheating section 1, the heating section 2, and the cooling section 3 each include an adjustable air inlet fan assembly, an adjustable air outlet fan assembly, and a pressure gradient monitoring unit, wherein an output end of the pressure gradient monitoring unit is connected to an input end of the control unit 46, and an output end of the control unit 46 is connected to control ends of the air inlet fan assembly and the air outlet fan assembly.
In this embodiment, the air inlet fan assembly includes a first fan and a first frequency converter that are arranged in the corresponding preheating section 1 or heating section 2 or cooling section 3, the output end of the control unit 46 is connected with the first fan through the first frequency converter, the exhaust fan assembly includes a second fan and a second frequency converter that are arranged outside the corresponding preheating section 1 or heating section 2 or cooling section 3, and the output end of the control unit 46 is connected with the second fan through the second frequency converter.
Through the above structure, the control unit 46 can individually control the air inlet fan assemblies and the air outlet fan assemblies in the preheating section 1, the heating section 2 and the cooling section 3 according to the feedback information of each pressure gradient monitoring unit, i.e. control the first frequency converter and the second frequency converter to adjust the rotating speeds of the first fan and the second fan, so as to change the pressure gradient value of the preheating section 1 or the heating section 2 or the cooling section 3 relative to the outside, thereby avoiding the situation that the pressure of each functional section is simultaneously increased or reduced, and being capable of individually adjusting the internal pressure of each functional section, so that the overall pressure can still be balanced when the outside fluctuates.
As shown in fig. 5 to 7, the first fan in this embodiment is: a preheating laminar flow fan 12, a high temperature laminar flow fan 21, and a cooling laminar flow fan 31;
the first frequency converter is: a preheating fan frequency converter 40, a cooling fan frequency converter 41 and a high temperature fan frequency converter (not shown in the figure);
the second fan is: preheating exhaust fan 16, high-temperature exhaust fan 26, cooling exhaust fan 38;
the second frequency converter is: a preheating exhaust frequency converter 42, a cooling exhaust frequency converter 44, and a high-temperature exhaust frequency converter 45;
the control end of the preheating laminar flow fan 12 is connected with the output end of the control unit 46 through a preheating fan frequency converter 40, the control end of the high-temperature laminar flow fan 21 is connected with the output end of the control unit 46 through a high-temperature fan frequency converter, the control end of the cooling laminar flow fan 31 is connected with the output end of the control unit 46 through a cooling fan frequency converter 41, the control end of the preheating exhaust fan 16 is connected with the output end of the control unit 46 through a preheating exhaust frequency converter 42, the control end of the high-temperature exhaust fan 26 is connected with the output end of the control unit 46 through a high-temperature exhaust frequency converter 45, and the control end of the cooling exhaust fan 38 is connected with the output end of the control unit 46 through a cooling exhaust frequency converter 44.
For practicing thrift the cost, the differential pressure monitoring between preheating section 1, heating section 2, the cooling section 3 does not have direct monitoring device in this embodiment, and pressure gradient monitoring unit is pressure transmitter, and pressure transmitter is: preheating pressure transmitter 43, high temperature pressure transmitter 47, cooling pressure transmitter 48, wherein, preheating pressure transmitter 43, high temperature pressure transmitter 47, the first collection end of cooling pressure transmitter 48 sets up in preheating section 1, heating section 2, cooling section 3, preheating pressure transmitter 43, high temperature pressure transmitter 47, the second collection end of cooling pressure transmitter 48 sets up in preheating section 1, heating section 2, the outside of cooling section 3, namely preheating pressure transmitter 43, high temperature pressure transmitter 47, the second collection end of cooling pressure transmitter 48 sets up in the washing and drying room, preheating pressure transmitter 43, high temperature pressure transmitter 47, the output of cooling pressure transmitter 48 is connected with the input of control unit 46 respectively. The pressure difference between the functional sections (namely the pressure difference between the preheating section 1 and the heating section 2 and the pressure difference between the heating section 2 and the cooling section 3) is converted by monitoring the pressure difference between the functional sections and the external washing and drying.
In this embodiment, the first collecting terminals of the preheating pressure transmitter 43, the high temperature pressure transmitter 47 and the cooling pressure transmitter 48 are respectively arranged at the positions 150mm below the preheating high-efficiency filter 14, the high-temperature high-efficiency filter 28 and the cooling high-efficiency filter 36. So as to accurately collect the internal pressure values of the preheating section 1, the heating section 2 and the cooling section 3.
As shown in fig. 5, the preheating section 1 of this embodiment includes a first air inlet disposed on the preheating box body 15, and a preheating laminar flow fan 12, a preheating fan housing 13, a preheating high-efficiency filter 14, a preheating exhaust fan 16, and a first exhaust duct 17 in the preheating box body 15, where the first air inlet is provided with a preheating coarse-efficiency filter 11. The first air inlet, the preheating laminar flow fan 12 and the first exhaust duct 17 are sequentially arranged to form a first air duct, and the preheating exhaust fan 16 is arranged on the first exhaust duct 17. With reference to the air flow arrow in fig. 4, the air flow of the preheating section 1 of this embodiment adopts an external circulation mode, the air entering from the first air inlet enters the negative pressure chamber where the preheating laminar flow fan 12 is located after being primarily filtered by the preheating coarse filter 11, enters the preheating air hood 13 under the adsorption load of the preheating laminar flow fan 12 and is uniformly and vertically blown to the preheating high efficiency filter 14 for secondary filtration, the laminar flow air after secondary filtration is vertically blown to the container medicine bottles 4 moving above the bottle conveying mesh belt 5 for preheating process treatment, and then the laminar flow air is exhausted through the first exhaust duct 17 under the adsorption of the preheating exhaust fan 16.
As shown in fig. 6, the heating section 2 in this embodiment includes an air supply opening 23 disposed on a high temperature box 24, and a high temperature laminar flow fan 21, a heating assembly 22, an air return frame 25, a high temperature high efficiency filter 28, a heating air cover 29, a high temperature exhaust fan 26, and a second exhaust duct 27 disposed in the high temperature box 24. The air supply opening 23, the high-temperature laminar flow fan 21 and the air return frame 25 are sequentially arranged to form a circulating air duct, the air return frame 25 is communicated with the second exhaust pipeline 17 to form an exhaust channel, and the high-temperature exhaust fan 26 is arranged on the second exhaust pipeline 17. In combination with the wind flow arrows in fig. 5, the wind flow of the heating section 2 in this embodiment adopts an internal circulation mode, a small amount of air entering from the position of the air supply opening 23 and a large amount of internal circulation wind enter the heating fan housing 29 under the adsorption load of the high-temperature laminar flow fan 21 after being heated by the heating assembly 22 and vertically blow towards the high-temperature high-efficiency filter 28, the filtered laminar flow air vertically blows towards the container medicine bottles 4 moving above the bottle conveying net belt 5, the container medicine bottles are subjected to the process treatment of drying, sterilizing and removing the heat source, and then the laminar flow wind enters the next operation cycle after passing through the return air frame 25 of the heating section 2, wherein because the air humidity at the feeding position of the heating section 2 is relatively high, the second exhaust duct 27 is arranged at the bottom, and a part of the high-temperature high-humidity air is exhausted from the heating section 2 through the high-temperature exhaust fan 26, and at the same time, the pressure gradient inside and outside the heating section 2 can be controlled.
As shown in fig. 7, the cooling section 3 in this embodiment includes a second air inlet on the cooling box 35, a laminar cooling fan 31, a high-efficiency cooling filter 36, and a cooling fan cover 37 in the cooling box 35, and further includes a cooling exhaust fan 38 and a third exhaust duct 34, the second air inlet is the cooling section air inlet 32 in fig. 6, the cooling section air inlet 32 is further provided with a coarse cooling filter 33, the cooling section air inlet 32, the laminar cooling fan 31, and the third exhaust duct 34 are sequentially arranged to form a second air duct, and the cooling exhaust fan 38 is disposed on the third exhaust duct 34. With reference to the airflow arrow in fig. 6, the airflow of the cooling section 3 in this embodiment adopts an external circulation mode, a large amount of cold air enters from the cooling section air inlet 32, after being primarily filtered by the cooling section coarse filter 33, enters the cooling fan housing 37 under the adsorption load of the cooling laminar flow fan 31 and is vertically blown to the cooling section high efficiency filter 36 for secondary filtering, the secondary filtered laminar flow air is vertically blown to the container medicine bottles 4 moving above the bottle conveying net belt 5 for cooling process treatment, and then is discharged out of the cooling box 35 through the exhaust duct 34 under the action of the cooling exhaust fan 38.
In this embodiment, the preheating section 1 and the cooling section 3 are respectively provided with an independent exhaust duct, an air inlet fan assembly and an exhaust fan assembly, so that the pressure conditions of the preheating section 1 and the cooling section 3 can be respectively and independently controlled, and the conditions that the pressures of the two functional sections are simultaneously increased or reduced are avoided.
The following is a specific implementation process of this embodiment:
an unloaded state: after the complete machine is installed in a customer pharmaceutical factory, the working opening of the preheating exhaust fan 16 and the cooling exhaust fan 38 is adjusted to a proper value in the working range (namely, a space which can be adjusted vertically in subsequent adjustment is ensured) and is kept unchanged at the stage, at the moment, the room pressure of the washing and drying room and the working pressure of the filling room are adjusted to a state in normal production, the working frequencies of the preheating laminar flow fan 12, the high-temperature laminar flow fan 21 and the cooling laminar flow fan 31 are adjusted through pressure difference display, so that the complete machine system achieves a wind pressure balance design gradient which meets hundred-level laminar flow, and after the balance gradient is stable, the working frequency of the high-temperature laminar flow fan 21 is not changed any more:
firstly, the air quantity of the preheating laminar flow fan 12 is controlled by gradually adjusting the frequency of the frequency converter 40 of the preheating fan by taking the range of 0-50HZ as a step length through the pressure gradient between the preheating section 1 and the washing and drying monitored by the preheating pressure transmitter 43 until the pressure of the preheating section 1 is higher than the pressure of the washing and drying room by 2-10pa.
Then, the air volume of the high-temperature laminar flow fan 21 is controlled by gradually adjusting the frequency of the frequency converter of the high-temperature fan by taking the range of 0-50HZ as a step length through the pressure gradient between the heating section 2 and the washing and drying room monitored by the high-temperature pressure transmitter 47 until the pressure of the heating section 2 is higher than the pressure of the washing and drying room by 3-12 pa.
Finally, the air volume of the cooling laminar flow fan 31 is controlled by gradually adjusting the frequency of the frequency converter 41 of the cooling fan by taking the range of 0-50HZ as a step length through the pressure gradient between the cooling section 3 and the washing and drying room monitored by the cooling pressure transmitter 48 until the pressure of the cooling section 3 is higher than the pressure of the washing and drying room by the range of 2-10pa.
It should be noted that, when adjusting the frequencies corresponding to the preheating laminar flow fan 12, the high temperature laminar flow fan 21, and the cooling laminar flow fan 31, the commissioning personnel may adjust the operating frequencies of the preheating laminar flow fan 12, the high temperature laminar flow fan 21, and the cooling laminar flow fan 31 to the reasonable frequency and then perform fine adjustment with the range of 0 to 50HZ as a step length, after combining the past empirical values.
When normal production is finished in debugging, the bottle feeding stage is started, the initial working frequencies of the preheating laminar flow fan 12, the high-temperature laminar flow fan 21, the cooling laminar flow fan 31, the preheating exhaust fan 16, the high-temperature exhaust fan 26 and the cooling exhaust fan 38 are unchanged, the rotating speed at the moment is used as the initial rotating speed, and the working frequencies of the preheating laminar flow fan 12, the cooling laminar flow fan 31, the preheating exhaust fan 16 and the cooling exhaust fan 38 are automatically adjusted according to the bottle feeding position to maintain the balance of the internal pressure gradient, wherein the specific working conditions are as follows:
a bottle feeding stage:
the production bottle feeding stage is a process from no-load (no bottle on the mesh belt) to full load (bottle on the mesh belt), a heating inlet air brake SV1, a heating outlet air brake SV2 and an oven outlet air brake SV3 are opened from closing. When the bottle is fed, the heating inlet air lock SV1 is closed, and because the bottle is fed to block laminar air blown by the preheating laminar flow fan 12, so that the pressure difference of the preheating section 1 is gradually increased, and at the moment, the preheating pressure transmitter 43 monitors that the pressure gradient between the preheating section 1 and the washing and drying is higher than a set first upper limit, in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the preheating fan frequency converter 40 to reduce the rotating speed of the preheating laminar flow fan 12, reduce the air volume of the discharged air, avoid the fluctuation of the preheating pressure difference, and in order to reduce the adjustment time, the control unit 46 can also control the preheating exhaust frequency converter 42 to improve the rotating speed of the preheating exhaust fan 16; in the same way, the pressure gradient monitored by the high-temperature pressure transmitter 47 and the cooling pressure transmitter 48 is increased and changed into fluctuation after entering the heating section 2 and the cooling section 3; before the bottle enters the oven outlet air lock SV3, when the oven outlet air lock SV3 is opened, the laminar air of the cooling laminar flow fan 31 blocked by the bottle and the air filled in the filling room enable the pressure difference of the cooling section 3 to be continuously increased, and at the moment, the cooling pressure transmitter 48 monitors that the pressure gradient between the cooling section 3 and the washing and drying room is higher than a set second upper limit, so that in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the cooling fan frequency converter 41 to reduce the rotating speed of the cooling laminar flow fan 31, reduce the air exhaust volume, avoid the fluctuation of the cooling pressure difference, meet the control requirement, and in order to reduce the adjustment time, the control unit 46 can also control the cooling air exhaust frequency converter 44 to increase the rotating speed of the cooling air exhaust fan 38.
And (3) tail bottle emptying stage:
the production tail bottle emptying stage is a process from full load (bottle on the mesh belt) to no load (no bottle on the mesh belt), a heating inlet air brake SV1, a heating outlet air brake SV2 and an oven outlet air brake SV3 are opened to be closed.
When emptying begins, because the bottle cannot block laminar air blown by the preheating laminar flow fan 12 when emptying, the pressure difference of the preheating section 1 is gradually reduced, and at the moment, the preheating pressure transmitter 43 monitors that the pressure gradient between the preheating section 1 and the washing and drying is lower than a set first lower limit value, in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the preheating fan frequency converter 40 to increase the rotating speed of the preheating laminar flow fan 12, increase the air exhaust volume, avoid the fluctuation of the preheating pressure difference, and in order to reduce the adjustment time, the control unit 46 can also control the preheating exhaust frequency converter 42 to reduce the rotating speed of the preheating exhaust fan 16; when the mesh belt passes through the heating inlet air brake SV1 and completely enters the heating section 2, the preheating section 1 is in an idle state, the heating inlet air brake SV1 is closed, at this time, the influence of the heating section 2 on the preheating section 1 is reduced, most of the pressure difference of the preheating section 1 is influenced by the rotating speed of the preheating laminar flow fan 12, and the control unit 46 starts to control the preheating fan frequency converter 40 to adjust the rotating speed of the preheating laminar flow fan 12 to recover an initial set value and maintain the idle pressure difference. In the same way, the bottle is emptied through the heating section 2 and the cooling section 3, and the pressure gradient monitored by the high-temperature pressure transmitter 47 and the cooling pressure transmitter 48 is also reduced and changed into fluctuation; when the bottle is emptied to the front of the oven outlet air lock SV3 at the rear of the cooling section 3, the cooling laminar flow air which cannot be blocked after the bottle is emptied is only the air which is fed from the filling room, and at this time, the cooling pressure transmitter 48 monitors that the pressure gradient between the cooling section 3 and the washing and drying room may be lower than the set second lower limit value, so in order to maintain the original pressure gradient value of the whole machine, the control unit 46 starts to control the cooling fan frequency converter 41 to increase the rotating speed of the cooling laminar flow fan 31, increase the pressure difference, avoid the fluctuation of the cooling pressure difference, meet the control requirement, and in order to reduce the adjustment time, the control unit 46 can also control the cooling exhaust frequency converter 44 to decrease the rotating speed of the cooling exhaust fan 38. When the bottle is emptied and leaves out of the air lock SV3 at the outlet of the oven, the air lock SV3 at the outlet of the oven is closed, the control unit 46 starts to control the frequency converter 41 of the cooling fan to adjust the laminar flow fan 31 to recover the initial rotation speed, and controls the frequency converter 44 of the cooling exhaust fan to adjust the cooling exhaust fan 38 to recover the initial rotation speed, and the whole state of the oven is recovered to the no-load state. At this time, the operation is performed only in the idle state. This completes the whole process control of the production flow.
EXAMPLE III
The embodiment provides a tunnel type sterilization dryer wind pressure balance control system according to an embodiment, which comprises:
the initial pressure adjusting unit is used for respectively adjusting the air inlet amount of the preheating section, the heating section and the cooling section, so that the pressure gradient values of the preheating section, the heating section and the cooling section relative to the washing and drying room are all in a preset threshold range, and the air inlet amount and the air exhaust amount of the preheating section and the cooling section at the moment are used as initial values;
the pressure reduction unit is used for reducing the air intake of the preheating section or increasing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying room is within a preset threshold range after the first bottle of the container medicine bottle queue reaches the preheating section, and reducing the air intake of the cooling section or increasing the air exhaust of the cooling section until the pressure gradient value of the cooling section relative to the washing and drying room is within the preset threshold range after the first bottle of the container medicine bottle queue reaches the cooling section;
and the pressure lifting unit is used for increasing the air intake of the preheating section or reducing the air exhaust of the preheating section until the pressure gradient value of the preheating section relative to the washing and drying room is within a preset threshold range after the tail bottles of the container medicine bottle queue reach the heating section, increasing the air intake of the cooling section or reducing the air exhaust of the cooling section until the pressure gradient value of the cooling section relative to the washing and drying room is within a preset threshold range after the tail bottles of the container medicine bottle queue reach the cooling section, and recovering the air intake and the air exhaust of the preheating section and the cooling section to initial values after the container medicine bottles are emptied from the cooling section.
The foregoing is considered as illustrative of the preferred embodiments of the invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention, unless the technical essence of the present invention departs from the content of the technical solution of the present invention.
Claims (9)
1. A tunnel sterilizing dryer wind pressure balance control method is characterized by comprising the following steps:
s1) adjusting the air intake of each functional section to enable the pressure gradient value of each functional section relative to the outside to be within a preset threshold range, and taking the air intake of each functional section at the moment as an initial value;
s2) if in the bottle feeding stage, reducing the air intake of the corresponding functional section according to the position of the first bottle of the container medicine bottle queue reaching the preheating section or the cooling section until the pressure gradient value of the preheating section or the cooling section relative to the outside is in a preset threshold range;
s3) if the tail bottles in the container medicine bottle queue reach the preheating section or the cooling section in the tail bottle emptying stage, increasing the air intake of the corresponding functional section until the pressure gradient value of the preheating section or the cooling section relative to the outside is within the preset threshold range, and restoring the air intake of each functional section to the initial value after the container medicine bottles are emptied.
2. The method for controlling the wind pressure balance of the tunnel sterilizing dryer according to claim 1, wherein the specific steps of the step S1) comprise:
acquiring a pressure gradient value of the preheating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset first threshold range, adjusting the air intake of the preheating section until the pressure gradient value is in the preset first threshold range;
acquiring a pressure gradient value of the heating section of the functional section relative to the outside, and if the pressure gradient value is out of a preset second threshold range, adjusting the air intake of the heating section until the pressure gradient value is in the preset second threshold range;
and obtaining a pressure gradient value of the cooling section of the functional section relative to the outside, and if the pressure gradient value is out of a preset third threshold range, adjusting the air inlet quantity of the cooling section until the pressure gradient value is in the preset third threshold range.
3. The method for controlling the wind pressure balance of the tunnel sterilizing dryer according to claim 1, wherein the specific steps of the step S2) include:
s21) before the first bottle of the container medicine bottle queue reaches the inlet of the heating section of the functional section, if the pressure gradient value of the preheating section relative to the outside is larger than a first upper limit value, reducing the air intake of the preheating section until the pressure gradient value is smaller than the first upper limit value;
s22) after the first bottle of the container medicine bottle queue reaches the inlet of the heating section of the functional section, and before the first bottle of the container medicine bottle queue reaches the inlet of the cooling section of the functional section, keeping the air intake of the preheating section, the heating section and the cooling section unchanged;
s23) after the first bottle of the container and medicine bottle queue reaches the inlet of the cooling section, if the pressure gradient value of the cooling section relative to the outside is larger than a second upper limit value, reducing the air intake of the cooling section until the pressure gradient value is smaller than the second upper limit value.
4. The method for controlling wind pressure balance of the tunnel sterilizing dryer according to claim 1, wherein the step S3) comprises the following steps:
s31) after the tail bottle of the container medicine bottle queue reaches the inlet of the preheating section of the functional section, if the pressure gradient value of the preheating section of the functional section relative to the outside is smaller than a first lower limit value, increasing the air intake of the preheating section until the pressure gradient value is larger than the first lower limit value;
s32) after the tail bottles of the container medicine bottle queue reach the inlet of the cooling section of the functional section, if the pressure gradient value of the cooling section relative to the outside is smaller than a second lower limit value, increasing the air inlet quantity of the cooling section until the pressure gradient value is larger than the second lower limit value;
s33) after the tail bottles of the container and medicine bottle queue are emptied from the cooling section, the air supply volume of the preheating section and the cooling section is restored to the initial value.
5. A tunnel sterilizing dryer for executing the method of controlling the wind pressure balance of tunnel sterilizing dryer of any one of claims 1~4, comprising a preheating section (1), a heating section (2) and a cooling section (3) which are connected in sequence, further comprising a control unit (46), wherein each section of the preheating section (1), the heating section (2) and the cooling section (3) is provided with an adjustable air inlet fan assembly, an adjustable exhaust fan assembly and a pressure gradient monitoring unit, the output end of the pressure gradient monitoring unit is connected with the input end of the control unit (46), the control end of the exhaust fan assembly is connected with the output end of the control unit (46), and the tunnel sterilizing dryer is characterized in that:
the air inlet fan assembly comprises a first fan and a first frequency converter which are arranged in a corresponding preheating section (1), a heating section (2) or a cooling section (3), the output end of the control unit (46) is connected with the first fan through the first frequency converter, the exhaust fan assembly comprises a second fan and a second frequency converter which are arranged outside the corresponding preheating section (1), the heating section (2) or the cooling section (3), and the output end of the control unit (46) is connected with the second fan through the second frequency converter, so that the first frequency converter and the second frequency converter are controlled to adjust the rotating speed of the first fan and the rotating speed of the second fan, and the pressure gradient value of the preheating section (1), the heating section (2) or the cooling section (3) relative to the outside is changed.
6. The tunnel sterilization dryer according to claim 5, wherein the preheating section (1) comprises a first air inlet and a first exhaust duct (17), the first air inlet, the first fan and the first exhaust duct (17) are arranged in sequence to form a first air duct, and the second fan is disposed on the first exhaust duct (17).
7. The tunnel type sterilization dryer according to claim 5, wherein the heating section (2) comprises an air supply opening (23), an air return frame (25) and a second exhaust duct (27), the air supply opening (23), the first fan and the air return frame (25) are sequentially arranged to form a circulating air duct, the air return frame (25) and the second exhaust duct (27) are communicated to form an exhaust air channel, and the second fan is arranged on the second exhaust duct (27).
8. The tunnel sterilization dryer of claim 5, wherein the cooling section (3) comprises a second air inlet and a third air exhaust duct (34), the second air inlet, the first fan and the third air exhaust duct (34) are sequentially arranged to form a second air duct, and the second fan is disposed on the third air exhaust duct (34).
9. The tunnel sterilization dryer of claim 5, wherein the pressure gradient monitoring unit is a pressure transmitter, a first collection end of the pressure transmitter is arranged in the corresponding preheating section (1) or heating section (2) or cooling section (3), a second collection end of the pressure transmitter is arranged outside the corresponding preheating section (1) or heating section (2) or cooling section (3), and an output end of the pressure transmitter is connected with an input end of the control unit (46).
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Application publication date: 20220107 Assignee: Changsha Pharmaceutical Equipment Industrial Technology Research Institute Co.,Ltd. Assignor: TRUKING TECHNOLOGY Ltd. Contract record no.: X2023980051833 Denomination of invention: Wind Pressure Balance Control Method and Tunnel Sterilization and Drying Machine for Tunnel Sterilization and Drying Granted publication date: 20230328 License type: Common License Record date: 20231213 |