Temperature regulating mechanism and temperature regulating method of grain dryer

Abstract

The present invention discloses a temperature control mechanism and a temperature control method for a grain dryer, comprising: a front air intake chamber, the front air intake chamber comprising at least one vertical-horizontal partition and being continuously arranged within two adjacent chambers, the two vertical-horizontal partitions jointly defining at least two completely isolated chambers so that the two chambers are respectively in a connected or closed state; at least one hot air chamber and a cold air chamber are respectively defined in one of the chambers of the front air intake chamber. The vertical-horizontal partition is pivotally connected with a connecting shaft to form a revolving door structure, and the vertical-horizontal partitions of the two adjacent chambers are respectively in a vertical state and a horizontal state, and the connecting shaft is externally connected to a driving component. The above structure can ensure a uniform hot air temperature of the dryer, can control the hot air volume as the moisture content changes, reduce the occurrence of high-temperature waist-holding, improve the drying quality, reduce fuel usage, and has an energy-saving function.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature regulation of grain dryers, and in particular to a temperature regulation mechanism and a temperature regulation method of a grain dryer. Background Art

[0002] A variety of grain dryers are known in the art, which can be classified according to their structural features for the grain displacement path and the drying air circulation. Currently, existing dryers have baffles for guiding the air flow, and the drying air is confined within the baffles. The drying air is usually heated by a burner or heater system.

[0003] In order to ensure the required heat and flow, the hot air furnace is mainly controlled manually to achieve furnace temperature and hot air inlet volume. Although there is a temperature display at the outlet of the hot air furnace, the temperature control accuracy is limited due to factors such as ambient temperature differences, differences in operator technical experience, and slow temperature adjustment response speed. Large temperature adjustment differences will affect the drying grain. Depending on the temperature change, there is a risk of high temperature drying. For this reason, we provide grain dryer temperature control mechanism and temperature control method to solve the above problems. Summary of the Invention

[0004] In response to the problems existing in the above-mentioned prior art, one of the purposes of the present invention is to provide a grain dryer temperature control mechanism to ensure uniform hot air temperature of the dryer, control the hot air volume as the moisture content changes, reduce the occurrence of high-temperature waist-holding, improve drying quality, reduce fuel usage, and have energy-saving function. Another purpose of the present invention is to provide a grain dryer temperature control method that fully utilizes the grain dryer temperature control mechanism.

[0005] In order to achieve the above-mentioned object, the temperature regulating mechanism of the grain dryer adopted by the present invention comprises:

[0006] a drying section, through which the grain to be dried passes;

[0007] front air chamber;

[0008] rear air outlet chamber;

[0009] an inlet for loading grain to be dried;

[0010] The grain discharge section is located below the entrance;

[0011] A programmable logic control component, which is connected to at least the above-mentioned drive component, temperature sensor and humidity sensor, wherein:

[0012] At least one temperature sensor and at least one humidity sensor are located in the drying portion; wherein:

[0013] The front air chamber includes at least one vertical-horizontal partition continuously arranged in two adjacent chambers, and the two vertical-horizontal partitions jointly define at least two completely isolated chambers so that the two chambers are respectively in a connected or closed state;

[0014] At least one hot air chamber and a cold air chamber are respectively defined in one of the chambers of the front air intake chamber.

[0015] The vertical-horizontal partitions are pivotally connected with a connecting shaft to form a revolving door structure, and the vertical-horizontal partitions of two adjacent chambers are respectively in a vertical state and a horizontal state, and the connecting shaft is externally connected to a driving component.

[0016] The above-mentioned driving component includes a connecting rod connected to the outside of each connecting shaft, and multiple connecting rods are connected together by a cross bar. The swing rod connected to the output shaft of the driving motor is connected to the above-mentioned cross bar. The swing rod rotates with the above-mentioned output shaft and drives the cross bar to swing to realize the synchronous swinging action of multiple connecting rods, so that the connecting shaft rotates and realizes the switching of the vertical-horizontal partition between the horizontal state and the vertical state.

[0017] The above structure can ensure the uniform hot air temperature of the dryer, control the hot air volume according to the change of moisture content, reduce the occurrence of high temperature waist, improve the drying quality, reduce fuel consumption, and have energy-saving function.

[0018] As a further optimization of the above solution, the interior of the chamber is provided with a pad for limiting the rotation position of the vertical-horizontal partition to avoid excessive rotation of the vertical-horizontal partition.

[0019] Based on the above structure, from the perspective of energy saving, there are generally two ways, one is to adopt a circulating air structure, and the other is a stepped hot air structure. In view of this, we combine the circulating air structure with the stepped hot air structure to form the following structure:

[0020] The circulating air duct connects the hot air chamber and the rear air outlet chamber. Specifically:

[0021] The drying part comprises an upper and a lower part, the upper part being a first heating chamber and the lower part being a second heating chamber;

[0022] The hot air chamber has two independent connecting chambers, which are respectively connected to the first heating chamber and the second heating chamber, wherein:

[0023] The temperature of the first heating chamber is higher than that of the second heating chamber.

[0024] The above-mentioned structural setting integrates the circulating air structure with the stepped hot air structure to significantly reduce the energy consumption of the grain dryer.

[0025] Specifically, for common grain structures, the temperature of the first heating chamber can be set to 140°C-160°C, and the temperature of the second heating chamber can be set to 90°C-110°C.

[0026] For the utilization of circulating air, we propose a more detailed usage structure. Through the four-sector structure, we ensure the realization of gradient heating and better utilization of circulating air. More importantly, the four sectors supply circulating air with different humidity and temperature to achieve precise utilization of circulating air. The specific structure is shown below:

[0027] The rear air outlet chamber has three ventilation channels and four sectors. The three ventilation channels are the first ventilation channel, the second ventilation channel and the third ventilation channel. The four sectors are the first sector, the second sector, the third sector and the fourth sector.

[0028] The first ventilation channel receives the hot air ventilated from the drying part;

[0029] The second ventilation channel receives the hot air ventilated from the drying part and has a built-in heating device;

[0030] The third ventilation channel receives the hot air ventilated from the drying part and has at least two built-in heating devices;

[0031] The first sector controls and communicates the first ventilation channel and the second heating chamber through the hot air chamber;

[0032] The second sector controls and connects the first ventilation channel, the second ventilation channel and the second heating chamber through the hot air chamber;

[0033] The third sector controls and communicates with the second ventilation channel and the first heating chamber through the hot air chamber;

[0034] The fourth sector controls and is connected to the third ventilation channel and the first heating chamber through the hot air chamber.

[0035] A grain dryer temperature control method implements the grain dryer temperature control mechanism as described in any of the above schemes.

[0036] The grain dryer temperature control mechanism and temperature control method of the present invention have the following beneficial effects:

[0037] 1. The temperature regulating mechanism of the grain dryer of the present invention can ensure the uniform hot air temperature of the dryer, control the hot air volume as the moisture content changes, reduce the occurrence of high-temperature waist-holding, improve the drying quality, reduce fuel usage, and have energy-saving function.

[0038] 2. The temperature regulating mechanism of the grain dryer of the present invention integrates the circulating air structure with the stepped hot air structure from the perspective of energy saving to achieve the energy saving effect to the maximum extent.

[0039] 3. The temperature control mechanism of the grain dryer of the present invention takes into account the influence of humidity in the circulating air and is designed with a four-sector structure to ensure the realization of gradient heating and better utilization of the circulating air. More importantly, the four sectors supply circulating air with different humidity and temperature to achieve accurate utilization of the circulating air.

[0040] 4. The grain dryer temperature control method of the present invention can fully utilize the temperature control mechanism of the grain dryer.

[0041] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating how the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby, and the embodiments of the present invention include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural diagram of the temperature control mechanism of the grain dryer;

[0043] Figure 2 Schematic diagram of the structure of the front air chamber in the present invention;

[0044] Figure 3 Schematic diagram of the structure of the vertical-horizontal partition in the present invention;

[0045] Figure 4 Schematic diagram of the structure of the driving motor in the present invention;

[0046] Figure 5 Schematic diagram of the structure of the circulating air duct in the present invention;

[0047] Figure 6 Schematic diagram of the structure of the drying section in the present invention;

[0048] Figure 7 It is a structural schematic diagram of the rear air outlet chamber in the present invention.

[0049] In the figure: 1. slow recovery section; 2. drying section; 3. grain discharge section; 4. front air intake chamber; 5. rear air outlet chamber; 6. vertical-horizontal partition; 7. hot air chamber; 8. cold air chamber; 9. circulating air duct; 21. first heating chamber; 22. second heating chamber; 51. first ventilation channel; 52. second ventilation channel; 53. third ventilation channel; 54. first sector; 55. second sector; 56. third sector; 57. fourth sector; 61. connecting shaft; 62. connecting rod; 63. cross bar; 64. driving motor; 65. swing rod; 66. pad. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0051] It should be noted that when an element is referred to as being "disposed on, provided with" another element, it may be directly on the other element or there may also be an element in the middle; when an element is considered to be "connected, connected to" another element, it may be directly connected to the other element or there may be an element in the middle at the same time; "fixed connection" means a fixed connection, and there are many ways of fixed connection, which are not within the scope of protection of this article; the terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0053] Please refer to the instruction manual Figure 1-4 It can be clearly seen that the present invention discloses a temperature regulating mechanism for a grain dryer, which allows drying under ideal temperature and humidity conditions, thereby obtaining grain of better quality and achieving significantly low energy consumption.

[0054] First, for illustrative purposes, refer to Figure 1 , specifically will show the detailed structure of the grain dryer in the present invention:

[0055] Generally, a grain dryer has a three-dimensional structure, with a slow drying section 1, a drying section 2, and a grain discharge section 3 arranged in sequence along the vertical direction. However, the present invention mainly focuses on the drying section 2, which specifically includes the following structures:

[0056] a drying section, through which the grain to be dried passes;

[0057] Front air chamber 4;

[0058] rear air outlet chamber 5;

[0059] an inlet for loading grain to be dried;

[0060] The grain discharge part located below the inlet is called the grain discharge section; it is characterized by:

[0061] Specific reference Figure 2-Figure 4The front air chamber 4 includes at least one vertical-horizontal partition 6 and is continuously arranged in two adjacent chambers. The two vertical-horizontal partitions 6 together define at least two completely isolated chambers so that the two chambers are respectively in a connected or closed state;

[0062] At least one hot air chamber 7 for receiving external hot air and a cold air chamber 8 for receiving external cold air are respectively defined in one of the chambers of the front air intake chamber 4;

[0063] A programmable logic control component, which is connected to at least the above-mentioned drive component, temperature sensor and humidity sensor, wherein:

[0064] At least one temperature sensor and at least one humidity sensor are located in the drying portion.

[0065] Special References Figure 2 There is one hot air chamber 7 and two cold air chambers 8 , and the cold air chambers 8 are located on both sides of the hot air chamber 7 .

[0066] Special References Figure 2 The hot air chamber 7 is connected to an external hot air pipe, and the cold air chamber 8 is connected to a cold air pipe (not shown in the figure). Of course, as a possibility, the cold air chamber 8 can also be directly connected to the outside air.

[0067] Special References Figure 3 as well as Figure 4 ,Should Figure 3 as well as Figure 4 The detailed structure of the vertical-horizontal partition 6 is shown. Specifically, in this embodiment:

[0068] The above-mentioned vertical-horizontal partition 6 is pivotally connected with a connecting shaft 61 to form a revolving door structure, and the vertical-horizontal partitions 6 of the two adjacent chambers are respectively in a vertical state and a horizontal state. The connecting shaft 61 is externally connected to a driving component, and the above-mentioned driving component includes a connecting rod 62 connected to the outside of each connecting shaft 61. Multiple connecting rods 62 are connected together by a cross bar 63. The swing rod 65 connected to the output shaft of the drive motor 64 is connected to the above-mentioned cross bar 63. The swing rod 65 rotates with the above-mentioned output shaft and drives the cross bar 63 to swing to realize the synchronous swinging action of multiple connecting rods 62, so that the connecting shaft 61 rotates and realizes the switching of the vertical-horizontal partition 6 between the horizontal state and the vertical state.

[0069] More specifically, Figure 3 as well as Figure 4As shown, the vertical-horizontal partitions 6 in the hot air chamber 7 and the cold air chamber 8 are in different states. For example, when hot air needs to be introduced into the drying section 2, the vertical-horizontal partitions 6 in the hot air chamber 7 are in a vertical state to allow external hot air to pass through the hot air chamber into the drying section 2, while the vertical-horizontal partitions 6 in the cold air chamber 8 are in a horizontal state to close the passage of the cold air chamber 8 and prevent external cold air from entering the drying section 2.

[0070] When it is necessary to let in cold air, the driving motor drives the multi-link structure composed of the swing rod 65, the cross rod 63, the connecting rod 62 and the connecting shaft 61 to swing, so that the vertical-horizontal partition 6 in the hot air chamber 7 is in a horizontal state to close the hot air chamber and the vertical-horizontal partition 6 in the cold air chamber 8 is in a vertical state to open the cold air chamber 8, so that cold air can be introduced into the drying section 2.

[0071] As a supplement to the above scheme, in details, such as Figure 3 as well as Figure 4 As shown, the interior of the chamber is provided with a pad 66 for limiting the rotation position of the vertical-horizontal partition 6 to avoid excessive rotation of the vertical-horizontal partition 6 .

[0072] Figure 6 The second embodiment is further improved on the basis of the above structure. Based on the above structure, the second embodiment takes energy saving into consideration. There are generally two energy saving methods for the drying section of the grain dryer. One method is to adopt a circulating air structure. The circulating air structure, such as Figure 5 As shown, it is generally arranged on the hot air stove as a preheating structure. The other is a stepped hot air structure. By setting a stepped temperature in the drying section 2, the consumption of bottom fuel is reduced to achieve the purpose of energy saving.

[0073] In view of the above situation, please refer to Figure 6 , we integrate the circulating air structure with the stepped hot air structure and form the following structure:

[0074] The circulating air duct 9 is connected to the hot air chamber 7 and the rear air outlet chamber 5. Specifically:

[0075] The drying part comprises an upper and a lower part, the upper part being a first heating chamber 21 and the lower part being a second heating chamber 22;

[0076] The hot air chamber 7 has two independent connecting chambers, which are respectively connected to the first heating chamber 21 and the second heating chamber 22, wherein:

[0077] The temperature of the first heating chamber 21 is higher than that of the second heating chamber 22 .

[0078] The above-mentioned structural setting integrates the circulating air structure with the stepped hot air structure to significantly reduce the energy consumption of the grain dryer.

[0079] As a supplement to the above solution, in terms of details, for common grain structures, the temperature of the first heating chamber 21 can be set to 140℃-160℃, and the temperature of the second heating chamber 22 can be set to 90℃-110℃. Generally, the temperature of the first heating chamber 21 is maintained at 150℃, and the temperature of the second heating chamber 22 is at 100℃.

[0080] For the utilization of circulating air, we propose a more detailed usage structure, such as Figure 7 As shown, the four-sector structure ensures the realization of gradient heating and better utilization of circulating air. More importantly, the four sectors supply circulating air with different humidity and temperature to achieve accurate utilization of circulating air. The specific structure is shown below:

[0081] The rear air outlet chamber 5 has three ventilation channels and four sectors. The three ventilation channels are the first ventilation channel 51, the second ventilation channel 52 and the third ventilation channel 53. The four sectors are the first sector 54, the second sector 55, the third sector 56 and the fourth sector 57.

[0082] The first ventilation channel 51 receives the hot air ventilated from the drying part;

[0083] The second ventilation channel 52 receives the hot air ventilated from the drying part and has a built-in heating device;

[0084] The third ventilation channel 53 receives the hot air ventilated from the drying part and has at least two built-in heating devices;

[0085] The first sector 54 controls and connects the first ventilation channel 51 and the second heating chamber 22 through the hot air chamber 7;

[0086] The second sector 55 controls and connects the first ventilation channel 51, the second ventilation channel 52 and the second heating chamber 22 through the hot air chamber 7;

[0087] The third sector 56 controls and connects the second ventilation channel 52 and the first heating chamber 21 through the hot air chamber 7;

[0088] The fourth sector 57 controls and is connected to the third ventilation channel 53 and the first heating chamber 21 through the hot air chamber 7 .

[0089] Specifically, the sectors are controlled by a control component to control a revolving door similar to the vertical-horizontal partition 6 structure to realize the opening and closing of the sectors, so as to achieve the purpose of controlling whether ventilation is passed through the sectors.

[0090] Specifically, for example, the third sector allows a temperature of 140°C-150°C, an allowable relative humidity of 20%-22%, and an outlet temperature of 45°C and a relative humidity of 55%. Only when the hot air in the third sector reaches the allowable temperature and relative humidity, the revolving door of the sector opens, thereby enhancing the utilization effect of the circulating air. Taking the drying effect of soybeans as an example, the moisture content of the soybean variety was reduced from an initial 13% to 8%. The traditional method uses 2500Kcal / kg of energy, which is reduced by 500-1000Kcal / kg. Obviously, the above improvements have significant advantages in energy saving.

[0091] The present invention also provides a grain dryer temperature control method, which includes a grain dryer temperature control mechanism constructed by the above scheme.

[0092] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. Grain dryer temperature control mechanism, including: a drying section, through which the grain to be dried passes; front air chamber; rear air outlet chamber; an inlet for loading grain to be dried; The grain discharge part is located below the inlet; it is characterized by: The front air chamber includes at least one vertical-horizontal partition continuously arranged in two adjacent chambers, and the two vertical-horizontal partitions jointly define at least two completely isolated chambers so that the two chambers are respectively in a connected or closed state; At least one hot air chamber for receiving external hot air and a cold air chamber for receiving external cold air are respectively defined in one of the chambers of the front air intake chamber; The circulating air duct is connected to the hot air chamber and the rear air outlet chamber; The drying part comprises an upper and a lower part, the upper part being a first heating chamber and the lower part being a second heating chamber; The hot air chamber has two independent connecting chambers, which are respectively connected to the first heating chamber and the second heating chamber, wherein: The temperature of the first heating chamber is higher than that of the second heating chamber; The temperature of the first heating chamber is 140℃-160℃, and the temperature of the second heating chamber is 90℃-110℃; The rear air outlet chamber has three ventilation channels and four sectors. The three ventilation channels are the first ventilation channel, the second ventilation channel and the third ventilation channel. The four sectors are the first sector, the second sector, the third sector and the fourth sector. The first ventilation channel receives the hot air ventilated from the drying part; The second ventilation channel receives the hot air ventilated from the drying part and has a built-in heating device; The third ventilation channel receives the hot air ventilated from the drying part and has at least two built-in heating devices; The first sector controls and communicates the first ventilation channel and the second heating chamber through the hot air chamber; The second sector controls and connects the first ventilation channel, the second ventilation channel and the second heating chamber through the hot air chamber; The third sector controls and communicates with the second ventilation channel and the first heating chamber through the hot air chamber; The fourth sector controls and is connected to the third ventilation channel and the first heating chamber through the hot air chamber.

2. The temperature regulating mechanism of the grain dryer according to claim 1, characterized in that: The vertical-horizontal partitions are pivotally connected with a connecting shaft to form a revolving door structure, and the vertical-horizontal partitions of two adjacent chambers are respectively in a vertical state and a horizontal state, and the connecting shaft is externally connected to a driving component.

3. The temperature regulating mechanism of the grain dryer according to claim 2, characterized in that: The above-mentioned driving component includes a connecting rod connected to the outside of each connecting shaft, and multiple connecting rods are connected together by a cross bar. The swing rod connected to the output shaft of the driving motor is connected to the above-mentioned cross bar. The swing rod rotates with the above-mentioned output shaft and drives the cross bar to swing to realize the synchronous swinging action of multiple connecting rods, so that the connecting shaft rotates and realizes the switching of the vertical-horizontal partition between the horizontal state and the vertical state.

4. The temperature regulating mechanism of the grain dryer according to claim 3, characterized in that: The interior of the chamber is provided with a pad for limiting the rotation position of the vertical-horizontal partition.

5. The temperature regulating mechanism of the grain dryer according to claim 4, characterized in that: The system further comprises a programmable logic control component, which is connected to at least the above-mentioned drive component, temperature sensor and humidity sensor, wherein: At least one temperature sensor and at least one humidity sensor are located in the drying portion.

6. Grain dryer temperature control method, characterized by: Implement the grain dryer temperature control mechanism as described in any one of claims 1 to 5.

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