A saline-alkali land rice planting shed with a ventilation circulation system

Abstract

The present invention discloses a saline-alkali land rice planting shed with a ventilation circulation system, which relates to the technical field of planting sheds. The ventilation process of the shed used for rice seedling cultivation in saline-alkali land is improved, and a ventilation method formed by combining temperature measurement and gas replacement is adopted. The difference is that the gas circulation method is bottom-out and top-in, and its purpose is to reduce the temperature inside the shed by extracting greenhouse gases, and the air extraction process is mainly aimed at the bottom position inside the shed, and its purpose is to directly act on the rice seedling raising area. Its key purpose is: on the basis of regulating the temperature, the moisture existing in the upper position inside the shed can be "returned" to the rice seedling raising area, avoiding the interference factors of temperature and moisture affecting the ventilation and seedling hardening effect. The above content is combined with the system control method, and an adaptive and time-based working mode is adopted to ensure that the internal environment of the shed is maintained in balance under the premise of normal ventilation.

Description

Technical Field

[0001] The invention relates to the technical field of planting sheds, and in particular to a saline-alkali land rice planting shed with a ventilation circulation system. Background Art

[0002] For ventilation and hardening of rice seedlings in saline-alkali land, the common method is to complete the seedling cultivation in a greenhouse, and to promote the healthy growth of rice seedlings, temperature and moisture management are required. The conventional method is to add a ventilation system.

[0003] The main function of the ventilation system in the greenhouse is to change the temperature in the greenhouse mainly by exchanging air. However, for saline-alkali land rice seedling greenhouses, the bed soil needs to be improved first, including using running water to wash alkali, using water to press alkali, and using rice straw, wheat straw and other crop straw for fermentation and returning to the field. However, as the temperature in the greenhouse rises, on the one hand, it is not conducive to the growth of rice seedlings. On the other hand, it will aggravate the "heat accumulation" phenomenon in the soil temperature in the greenhouse, which is specifically manifested in the obvious upward change in the soil temperature at the roots of rice seedlings, followed by problems such as burning and destroying seedlings. The rising temperature will also cause soil moisture to evaporate, and the evaporation process will further lead to nutrient loss and gas volatilization. Especially for the greenhouse soil that has been fermented and returned to the field, the rising temperature will aggravate the decay of crop straw, and then increase the production of greenhouse gases (CO2, CH4), which will in turn further aggravate the temperature rise.

[0004] Conventional ventilation systems mainly use temperature measurement combined with air exchange. However, for rice seedlings in saline-alkali land, it is difficult to achieve the requirements of fine temperature control. There are still problems such as poor seedling status or even seedling burn. This application proposes a solution to this problem. Summary of the Invention

[0005] The purpose of the present invention is to provide a saline-alkali land rice planting shed with a ventilation circulation system. During the seedling raising stage of saline-alkali land rice, because the bed soil and conventional soil have different acidity and alkalinity, if only the conventional method of temperature measurement combined with ventilation is adopted, it cannot be fully applicable to the ventilation and seedling hardening process, such as poor seedling state or even burning and destruction of seedlings.

[0006] The objectives of the present invention can be achieved through the following technical solutions: A saline-alkali land rice planting shed with a ventilation circulation system, comprising a shed body and a piping system, wherein the piping system consists of a working assembly, an air return pipe, and an air outlet pipe, wherein the air return pipe and the air outlet pipe both extend into the interior of the shed body, and the air return pipe and the air outlet pipe match the working assembly;

[0007] The return air pipeline is arranged at the top of the interior of the shed, and an air return port is provided on the return air pipeline, and a vertically arranged air intake branch pipe is installed on the air outlet pipeline;

[0008] The inside of the air intake branch pipe is provided with an air bearing cover, a counterweight block and a piston block from top to bottom, and the air intake branch pipe is provided with an air vent and an air outlet corresponding to the air bearing cover and the piston block.

[0009] It is further configured as follows: the air return port and the air intake branch pipe are linearly and equidistantly arranged along the length direction of the shed body, and the top end of the air intake branch pipe is installed at the top end position of the shed body.

[0010] It is further configured as follows: the working assembly includes a control module, an air extraction pump, a blower and a temperature module.

[0011] It is further configured that: the central area of the air-bearing cover is slidably connected to the inner wall of the air-inhalation branch pipe, and a plurality of balloons are installed on the outer position of the air-bearing cover.

[0012] It is further configured as follows: a connecting spring is installed between the top position of the inner wall of the air suction branch pipe and the central area of the air bearing cover.

[0013] It is further configured as follows: a connecting guide rod is installed between the air bearing cover and the piston block, the counterweight block is installed on the connecting guide rod, and the piston block is slidably connected to the inner wall of the suction branch pipe.

[0014] It is further configured as follows: a temperature balance model associated with the temperature inside the shed is established through the control module in the working assembly; the temperature balance model is provided with a stage classification unit, a data collection and analysis unit, and an action interaction unit; the stage classification unit is provided with an action cycle associated with the vacuum pump and the blower; a single gas replacement action is performed in each action cycle; and the stage classification unit, the data collection and analysis unit, and the action interaction unit are performed independently;

[0015] The data collection and analysis unit is used to collect the gas temperature parameters during a single gas replacement action and set them as Tt. Tt is used to represent the temperature of the gas sucked into the air intake branch pipe detected by the temperature sensor in the working assembly. The upper temperature limit is further set as To. Tt and To are used to calculate the ambient temperature level MT inside the shed, and the ambient temperature level is input into the action interaction unit.

[0016] In the action interaction unit, perform an interference action on a single gas replacement action using state levels. During the interference action, execute the data collection and analysis unit again and set the following contents:

[0017] When Tt inside the shed 1 is always less than or equal to To, the interference action is not performed, and single gas replacement actions are performed one by one according to the action cycle;

[0018] When MT is greater than 1, the exhaust volume Qt of the exhaust pump and the air supply volume Kt of the blower are set in the data collection and analysis unit. The level threshold associated with the ambient temperature level MT is further set to A. A is greater than 1. If MT is less than A or MT is equal to A, the exhaust pump and the blower continue to run, and Qt=Kt; if MT is greater than A, the exhaust pump and the blower continue to run, and Qt*(1+MT-A)=Kt.

[0019] The present invention has the following beneficial effects:

[0020] Improvements have been made to the ventilation process during the ventilation and hardening stage of rice in saline-alkali soil. A significant difference from conventional ventilation is that: the ventilation circulation direction has been improved. Specifically, the return air duct and the outlet air duct are used to form a bottom-out and top-in circulation mode. The outlet air duct is used to suck out the hot air at the bottom of the greenhouse, while the return air duct is used to replenish the low-temperature / normal-temperature air. The purpose is to use the air replacement method to achieve temperature regulation. However, because high temperature accelerates the evaporation of water vapor, it causes water vapor to accumulate at the top of the greenhouse. Therefore, on the basis of gas replacement, the water vapor can be "returned" to the interior of the greenhouse, avoiding the water vapor imbalance caused by the temperature regulation process that affects the ventilation and hardening effect.

[0021] In combination with the above content, it is further explained that the overall structure utilizes the balance relationship between buoyancy and temperature. Specifically, the buoyancy of the gas inside the balloon increases due to the increase in temperature, thereby affecting the balance relationship between the piston block and the connecting spring. The balance control mode is further set to form an adaptive and time-based working mode, which is used to maintain the normal growth environment of the rice seedlings inside the shed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a saline-alkali land rice planting shed with a ventilation circulation system proposed by the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a piping system in a saline-alkali land rice planting shed with a ventilation circulation system proposed by the present invention;

[0025] Figure 3 This is a front view of the return air pipeline and the outlet air pipeline in a saline-alkali land rice planting shed with a ventilation circulation system proposed by the present invention;

[0026] Figure 4 This is a cross-sectional view of an air intake branch pipe in a saline-alkali land rice planting shed with a ventilation circulation system proposed by the present invention;

[0027] Figure 5 The invention proposes a saline-alkali land rice planting shed with a ventilation circulation system Figure 4 Front view of

[0028] Figure 6 The invention proposes a saline-alkali land rice planting shed with a ventilation circulation system Figure 4 's split diagram.

[0029] In the figure: 1. Shed body; 2. Working assembly; 3. Return air pipeline; 4. Return air port; 5. Exhaust air pipeline; 6. Intake branch pipe; 7. Connecting spring; 8. Balloon; 9. Air cover; 10. Counterweight; 11. Piston block; 12. Connecting guide rod; 13. Exhaust port; 14. Vent port. DETAILED DESCRIPTION

[0030] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0031] During the ventilation and hardening stage of rice seedlings in saline-alkali soil, due to the difference in acidity and alkalinity between the bed soil and conventional soil, the conventional method of temperature measurement combined with ventilation is not fully applicable to the ventilation and hardening process. For example, the seedlings may be in poor condition or even burned or destroyed. In particular, the conventional ventilation system will indirectly lead to an imbalance in temperature and moisture inside the greenhouse. To solve this problem, the following technical solutions are proposed:

[0032] Reference Figures 1 to 6 In this embodiment, a saline-alkali land rice planting shed with a ventilation circulation system includes a shed body 1 and a piping system. The piping system consists of a working assembly 2, an air return pipe 3, and an air outlet pipe 5. The air return pipe 3 and the air outlet pipe 5 both extend into the interior of the shed body 1, and the air return pipe 3 and the air outlet pipe 5 are matched with the working assembly 2.

[0033] The air return pipe 3 is arranged at the top of the shed body 1, and the air return port 4 is provided on the air return pipe 3, and the air outlet pipe 5 is provided with a vertically arranged air intake branch pipe 6;

[0034] The inside of the air intake branch pipe 6 is provided with an air hood 9, a counterweight block 10 and a piston block 11 from top to bottom, and the air intake branch pipe 6 is provided with an air vent 14 and an air outlet 13 corresponding to the air intake hood 9 and the piston block 11. The return air port 4 and the air intake branch pipe 6 are linearly and equidistantly arranged along the length direction of the shed body 1. The top of the air intake branch pipe 6 is installed at the top position of the shed body 1. The working assembly 2 includes a control module, an air pump, a blower and a temperature module.

[0035] Working principle: The present invention is mainly aimed at the ventilation and hardening process of rice planted in saline-alkali land, which needs to be carried out in a greenhouse. The ventilation system in the greenhouse body 1 is one of the key factors affecting the ventilation and hardening effect. It should be noted that the essence of the ventilation system is to extract the air inside the greenhouse body 1 and replenish the low-temperature / normal-temperature air. However, under high-temperature conditions, the evaporation of water in the soil increases, and the evaporated water vapor mainly accumulates at the top position inside the greenhouse body 1. If only the gas replacement method is adopted, the accumulated water vapor will also be extracted, resulting in a relatively dry problem inside the greenhouse body 1. In a relatively dry environment, it will also affect the growth process of the rice seedlings.

[0036] The difference with the ventilation process proposed in this embodiment is that the vacuum pump in the working assembly 2 cooperates with the air outlet pipe 5 to extract the gas inside the shed 1, and the blower is used to replenish the gas from the external environment into the shed 1. However, in this embodiment, it is necessary to further limit the installation positions of the return air pipe 3 and the air outlet pipe 5. The return air pipe 3 is arranged at the top position inside the shed 1, and the air outlet pipe 5 is mainly arranged at the bottom position inside the shed 1. Therefore, when extracting gas, it is mainly targeted at the rice planting area. By directly extracting the hot air from the rice planting area, the temperature of the area can be directly lowered. When replenishing low-temperature / normal-temperature gas, gas is injected from top to bottom. The purpose is to "return" the accumulated water vapor to the rice planting area on the basis of replenishing "fresh" gas, so as to avoid water vapor imbalance and affect the growth of rice seedlings. Example

[0037] This embodiment provides additional explanations for the air intake branch pipe in the first embodiment:

[0038] There is a sliding connection between the central area of the air-bearing hood 9 and the inner wall of the suction branch pipe 6, and multiple balloons 8 are installed on the outside of the air-bearing hood 9. A connecting spring 7 is installed between the top position of the inner wall of the suction branch pipe 6 and the central area of the air-bearing hood 9. A connecting guide rod 12 is installed between the air-bearing hood 9 and the piston block 11. The counterweight 10 is installed on the connecting guide rod 12. There is a sliding connection between the piston block 11 and the inner wall of the suction branch pipe 6.

[0039] Solution description: The return air pipeline 3 is only used as a gas supplementary pipeline, which does not need to be explained in detail. The key lies in the suction branch pipeline 6. The suction branch pipeline 6 is connected to the outlet pipeline 5. When the vacuum pump is started, the gas inside the shed 1 can be sucked out through the outlet 13. However, the suction branch pipeline 6 can also serve as a supporting structure inside the shed 1, so this part will not be explained in detail.

[0040] The key lies in the coordination between the piston block 11 and the air outlet 13. In the initial state, the piston block 11 completely blocks the air outlet 13. In this state, even if the vacuum pump is started normally, the piston block 11 will slide downward along the inner wall of the air suction branch pipe 6, so that the air suction branch pipe 6 cannot suck out the gas inside the shed body 1. To solve this problem, the buoyancy of the balloon sac 8 is utilized in this embodiment. The interior of the balloon sac 8 is filled with a light gas with a low density, such as helium, hydrogen, etc., so that the buoyancy generated by the multiple balloon sacs 8 can drive the entire air cover 9 to move upward.

[0041] It is further explained that: in the initial state, and without considering the friction between the counterweight 11 and the air hood 9 and the inner wall of the air intake branch pipe 6, it is first necessary to limit the balance relationship between the sum of the gravity of the air hood 9, the counterweight 10 and the piston block 11 and the elastic coefficient of the connecting spring 7, which is specifically manifested as: after the connecting spring 7 completely "overcomes" the gravity of the air hood 9, the counterweight 10 and the piston block 11, the air hood 9 is guaranteed to be in a suspended state, but when the internal temperature of the shed 1 rises sharply, and because the internal temperature of the shed 1 is in a "layered" state from top to bottom, the temperature of the upper layer of the shed 1 is greater than the temperature of the lower layer, thereby causing the buoyancy generated by the balloon sacculus 8 to increase under the action of temperature, and then "breaking" the above-mentioned balance relationship, which is specifically manifested as: the piston block 11 moves up until the air outlet 13 is "exposed", and then the inhalation action can be performed to replace the gas. Example

[0042] The working assemblies are summarized and described in combination with Example 1 and Example 2:

[0043] In this embodiment, a temperature balance model related to the internal temperature of the shed 1 is established mainly through the control module. The temperature balance model is provided with a stage classification unit, a data collection and analysis unit, and an action interaction unit. The stage classification unit is provided with an action cycle related to the vacuum pump and the blower. A single gas replacement action is performed in each action cycle. The stage classification unit, the data collection and analysis unit, and the action interaction unit are operated independently.

[0044] The data collection and analysis unit is used to collect the gas temperature parameters in a single gas replacement action and set them as Tt. Tt is used to represent the temperature of the gas sucked into the intake branch pipe 6 detected by the temperature sensor, and the temperature upper limit is further set to To. The calculation process of the internal ambient temperature level MT of the shed 1 is performed using Tt and To, and the ambient temperature level is input into the action interaction unit, MT=(Tt-To) / To.

[0045] In the action interaction unit, the state level is used to perform interference on the single gas replacement action, and is combined with the ambient temperature level MT for analysis. The interference action includes the following:

[0046] S1: When Tt inside the shed 1 is always less than or equal to To, the ambient temperature level does not need to be considered. The specific reason is that the temperature inside the shed 1 is relatively low. As shown in the second embodiment, the air intake branch pipe 6 does not have the air intake capacity. Therefore, the temperature inside the air intake branch pipe 6 remains unchanged. Then, no interference action is performed. Single gas replacement actions are still performed according to the preset action cycle, such as a single gas replacement action every 1 hour.

[0047] S2: As shown in S1, in a single gas replacement action, if MT is greater than 1, it means Tt>To, and then it is necessary to fine-tune the power of the vacuum pump and the blower. For this, it is necessary to return to the data collection and analysis unit and set the suction volume Qt of the vacuum pump and the air supply volume Kt of the blower in the data collection and analysis unit. This needs to be explained again in combination with the external environment of the shed 1. During a certain period of time, the light is strong, which accelerates the production of greenhouse gases inside the shed 1 and accelerates the temperature rise. For this, the level threshold associated with the ambient temperature level MT is further set to A. A is greater than 1, and then the following actions are performed again:

[0048] S2-1: If MT<A or MT=A, the vacuum pump and the blower maintain Qt and Kt at the initial state, specifically, Qt and Kt are equal, and the vacuum pump and the blower continue to operate in this manner until Tt is less than or equal to To, at which time the vacuum pump and the blower stop operating;

[0049] S2-2: If MT>A, the vacuum pump and blower continue to operate, but Qt and Kt of the two need to be fine-tuned, specifically: Qt*(1+MT-A)=Kt. The specific purpose is to increase the content of low-temperature / normal-temperature gas inside the shed 1, thereby significantly reducing the temperature inside the shed 1.

[0050] In summary: The ventilation process of the greenhouse used for rice seedling cultivation in saline-alkali land is improved, and a ventilation method formed by combining temperature measurement and gas replacement is adopted. The difference is that the gas circulation method is bottom-out and top-in, and its purpose is to reduce the temperature inside the greenhouse by extracting greenhouse gases. The air extraction process is mainly aimed at the bottom position inside the greenhouse, and its purpose is to directly act on the rice seedling area. Its key purpose is: on the basis of regulating the temperature, the moisture in the upper position inside the greenhouse can be "returned" to the rice seedling area, avoiding the interference of temperature and moisture factors that affect the ventilation and seedling hardening effect. The above content is combined with the system control method, and an adaptive and time-based working mode is adopted to ensure that the internal environment of the greenhouse is maintained in balance under the premise of normal ventilation.

[0051] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they shall fall within the scope of protection of the present invention.

[0052] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A saline-alkali land rice planting shed with a ventilation circulation system, characterized in that: The utility model comprises a shed body (1) and a pipeline system, wherein the pipeline system is composed of a working assembly (2), a return air pipeline (3) and an outlet air pipeline (5), wherein the return air pipeline (3) and the outlet air pipeline (5) both extend into the interior of the shed body (1), and the return air pipeline (3) and the outlet air pipeline (5) are matched with the working assembly (2); The return air pipeline (3) is arranged at the top end of the shed body (1), and an air return port (4) is provided on the return air pipeline (3), and a vertically arranged air intake branch pipe (6) is installed on the air outlet pipeline (5); The air intake branch pipe (6) is provided with an air cover (9), a counterweight block (10) and a piston block (11) in the direction from top to bottom, and an air vent (14) and an air outlet (13) corresponding to the air cover (9) and the piston block (11) are provided on the air intake branch pipe (6); A temperature balance model of the internal temperature of the associated shed (1) is established through the control module in the working assembly (2), wherein the temperature balance model is provided with a stage classification unit, a data collection and analysis unit, and an action interaction unit. The stage classification unit is provided with an action cycle of an associated vacuum pump and a blower, and a single gas replacement action is performed in each action cycle. The stage classification unit is independently operated from the data collection and analysis unit and the action interaction unit. The data collection and analysis unit is used to collect the gas temperature parameters in a single gas replacement action and set it as Tt, Tt is used to represent the temperature of the gas sucked into the suction branch pipe (6) detected by the temperature sensor in the working assembly (2), and the temperature upper limit is further set to To, and the calculation process of the internal ambient temperature level MT of the shed body (1) is carried out using Tt and To, and the ambient temperature level is input into the action interaction unit, MT=(Tt-To) / To; In the action interaction unit, perform an interference action on a single gas replacement action using state levels. During the interference action, execute the data collection and analysis unit again and set the following contents: When Tt inside the shed (1) is always less than or equal to To, the interference action is not performed, and single gas replacement actions are performed one by one according to the action cycle; When MT is greater than 1, the exhaust volume Qt of the exhaust pump and the air supply volume Kt of the blower are set in the data collection and analysis unit. The level threshold associated with the ambient temperature level MT is further set to A. A is greater than 1. If MT is less than A or MT is equal to A, the exhaust pump and the blower continue to run, and Qt=Kt; if MT is greater than A, the exhaust pump and the blower continue to run, and Qt*(1+MT-A)=Kt.

2. The saline-alkali land rice planting shed with a ventilation circulation system according to claim 1, characterized in that: The air return port (4) and the air intake branch pipe (6) are linearly and equidistantly arranged along the length direction of the shed body (1), and the top end of the air intake branch pipe (6) is installed at the top end of the shed body (1).

3. The saline-alkali land rice planting shed with a ventilation circulation system according to claim 1, characterized in that: The working assembly (2) includes a control module, an air extraction pump, a blower and a temperature module.

4. The saline-alkali land rice planting shed with a ventilation circulation system according to claim 1, characterized in that: The central area of the air-bearing cover (9) and the inner wall of the air-inhalation branch pipe (6) are in sliding connection, and a plurality of balloons (8) are installed at the outer position of the air-bearing cover (9).

5. The saline-alkali land rice planting shed with a ventilation circulation system according to claim 4, characterized in that: A connecting spring (7) is installed between the top end of the inner wall of the air suction branch pipe (6) and the central area of the air bearing cover (9).

6. The saline-alkali land rice planting shed with a ventilation circulation system according to claim 4, characterized in that: A connecting guide rod (12) is installed between the air bearing cover (9) and the piston block (11), the counterweight block (10) is installed on the connecting guide rod (12), and the piston block (11) is in sliding connection with the inner wall of the air intake branch pipe (6).

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