Sectional type transmission device for side wall air inlet of livestock and poultry house and control method

Abstract

The invention belongs to the technical field of livestock and poultry breeding environment regulation and control, and discloses a livestock and poultry house side wall air inlet sectional type transmission device and a control method.The side wall ventilation window is connected with a control device, the control device is located on the side wall on the same side as the side wall air inlet, and the control device is used for controlling the opening degree of the ventilation window; the control device comprises a first driving part, a main control rope and a plurality of sub-control ropes, the output end of the first driving part is connected with the sub-control ropes through the main control rope, and the sub-control ropes are correspondingly connected with the ventilation windows of all the areas through traction ropes; the first driving part is used for driving the branch control ropes to move through the main control rope and controlling the ventilation window to be opened and closed through the traction rope. The parameters such as the cross sectional area of the livestock and poultry house, the number of all ventilation windows on the single side of the livestock and poultry house, the distance between the ventilation windows, the opening size of the ventilation windows, the initial opening degree of the ventilation windows and the like are collected and utilized, and the key ventilation parameters of the livestock and poultry house and the opening degree needed by the ventilation windows in all areas are accurately calculated. The ventilation effect is good, and the regulation and control precision is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of livestock and poultry breeding environment control, and in particular relates to a segmented transmission device for an air inlet on a side wall of a livestock and poultry house and a control method thereof. Background Art

[0002] The indoor environment of large-scale livestock and poultry houses has a vital impact on the healthy growth and production performance of livestock and poultry, and the ventilation system is the core of the indoor environment regulation. At present, livestock and poultry houses mainly use longitudinal ventilation systems to achieve environmental control. During the transition season and winter, fresh air mainly enters the house through the side wall air inlets, and then is directly discharged to the outside of the house through the exhaust fan on the gable. Therefore, precise control of the side wall air inlets is crucial for the creation and regulation of the indoor environment, and is the key to ensuring a uniform indoor environment and reasonable airflow. Since the building area of livestock and poultry houses is usually large, multiple air inlets are usually required on the walls on both sides. However, the existing side wall air inlet control method is relatively simple, and it is impossible to flexibly and accurately adjust the opening of each side wall air inlet according to the actual needs of the livestock and poultry house, and the operation process of implementing the opening adjustment is relatively cumbersome and complicated. Summary of the Invention

[0003] In order to solve the technical problems mentioned in the background technology, the present invention intends to provide a segmented transmission device and control method for the air inlet of the side wall of a livestock and poultry house.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: a segmented transmission device for the side wall air inlet of a livestock and poultry house, comprising a plurality of side wall air inlets, the plurality of side wall air inlets being spaced apart along the extension direction of the side wall of the livestock and poultry house, the plurality of side wall air inlets being divided into a plurality of areas along the extension direction of the livestock and poultry house; ventilation windows being provided in the side wall air inlets, the ventilation windows being connected to a control device, the control device being located on the side wall on the same side as the side wall air inlets, the control device being used to control the opening of the ventilation windows;

[0005] The control device includes a first driving member, a main control rope and several segmented control ropes. The first driving member is located on the side of the side wall of the livestock and poultry house away from the side wall air inlet. The output end of the first driving member is connected to one end of the several segmented control ropes close to the first driving member through the main control rope. The ends of the several segmented control ropes away from the main control rope extend outward along the extension direction of the multiple side wall air inlets. The several segmented control ropes and the ventilation windows in the side wall air inlets of each area are connected to each other through traction ropes; the first driving member is used to drive the several segmented control ropes to move along its own extension direction through the main control rope, and the segmented control ropes are used to control the opening of the ventilation windows through the traction ropes.

[0006] The principles and advantages of this solution are as follows: When ventilating livestock and poultry houses, the first driving member drives several segmented control ropes to move along their own extension direction through the main control rope. During the movement of each segmented control rope, the traction rope located at one end of the segmented control rope drives the traction rope to move along the extension direction of the segmented control rope. As the traction rope moves, the guide plate of the ventilation window moves, so that the ventilation windows in different areas can be accurately adjusted to different openings under the pull of the traction rope.

[0007] In this solution, a single first drive element simultaneously drives the movement of multiple segmented control ropes, enabling personalized adjustment of the ventilation window openings in multiple zones with a single drive force. This avoids the inaccurate and inconvenient adjustment of individual ventilation window positions through manual or independent control devices. Furthermore, by adjusting parameters such as the position and angle of each segmented control rope, the openings of different ventilation windows can be further varied, further improving the precision and convenience of ventilation window control to better meet the environmental requirements for the healthy growth of livestock and poultry.

[0008] Preferably, as an improvement, a pulley block is provided between the main control rope and the segmented control ropes, the pulley block being used to change the extension direction of the segmented control ropes. By providing the pulley block between the main control rope and the segmented control ropes, the multiple segmented control ropes can smoothly change their extension direction when converging at one end of the main control rope, while ensuring that each segmented control rope can move smoothly under the drive of the main control rope, thereby improving the smoothness of the first drive member's control of each segmented control rope.

[0009] Preferably, as an improvement, the spacing between adjacent segmented control ropes is different. By controlling the spacing between the segmented control ropes, it is ensured that several segmented control ropes move the same distance while being able to adjust the openings of the ventilation windows in different areas, thereby better ensuring the accuracy of the ventilation window opening adjustment in each area.

[0010] Preferably, as an improvement, the system further includes a second drive member, which is arranged parallel to the first drive member along the height of the side wall of the livestock and poultry house. The output end of the second drive member is connected to a global control rope; one end of the global control rope is connected to the output end of the second drive member, and the other end of the global control rope extends in the same direction as the segmented control rope. The global control rope is connected to each ventilation window via a second traction rope, and the second drive member is used to globally and uniformly control the opening of all ventilation windows via the global control rope. In particular, in special circumstances such as when the outdoor temperature is relatively high, the second drive member can drive the global control rope to fully open all ventilation windows to increase air intake.

[0011] Preferably, as an improvement, the global control rope is located between several segmented control ropes and the ventilation windows, so that the global control rope and several segmented control ropes can be separated from each other, avoiding interference between the global control rope and each segmented control rope, so that the ventilation windows can switch freely between global control and segmented control; and the global control rope is arranged above the segmented control rope, so that the distance between the global control rope and the traction rope of the ventilation window is smaller, so that the global control rope can complete the global unified opening of each ventilation window in a shorter moving distance, so as to improve the speed and convenience of opening each ventilation window under special circumstances.

[0012] A segmented control method for the air inlet on the side wall of a livestock and poultry house is applicable to the segmented transmission device for the air inlet on the side wall of a livestock and poultry house, and comprises the following steps:

[0013] Step 1: Collect environmental data parameters of the livestock and poultry house, such as the number of ventilation windows on one side of the livestock and poultry house n, the cross-sectional area A of the livestock and poultry house, the air density ρ, the ventilation volume Q of the livestock and poultry house under the design working conditions, the equivalent diameter D of the livestock and poultry house cross section, and the air inlet area A of a single ventilation window. w wait;

[0014] Step 2: Based on the environmental data parameters collected in step 1, calculate the average wind speed v in the room at the location of the i-th ventilation window. i , dynamic pressure P of the internal section d-i , along-the-line resistance ΔP f-i , ventilation window local resistance ΔP w-i and the local resistance of the cage ΔP c-i Perform calculations;

[0015] Step 3: Based on the environmental data parameters collected in step 1, calculate the air intake velocity v of each ventilation window and the static pressure P of the room section at the location of the first ventilation window. s-1 , calculate the static pressure P of the interior section at each ventilation window location in turn s-i ;

[0016] Step 4: Based on the uniform air intake velocity v of each ventilation window calculated in step 3 and the static pressure P of the internal section at the location of each ventilation window, s-i , calculate the static pressure loss coefficient ζ of each ventilation window i ;

[0017] Step 5: According to the static pressure loss coefficient ζ of each ventilation window obtained in step 4 i By comparing the relationship between the ventilation window opening and the static pressure loss coefficient, the opening of each ventilation window can be determined, and thus the distance between the segmented control ropes in each area can be determined.

[0018] Preferably, as an improvement, in step 2, the average wind speed v in the cross section of the house isn When calculating, first calculate the average wind speed v1 of the first ventilation window at the end of the livestock and poultry house Then, the average wind speed in the room at the location of the i-th ventilation window is Where A is the cross-sectional area of the livestock and poultry house, n is the number of ventilation windows on one side of the livestock and poultry house, and Q is the ventilation volume of the livestock and poultry house under the design working conditions;

[0019] Dynamic pressure P of the internal section at the location of each ventilation window d-i The calculation formula is: Where ρ is the air density;

[0020] The resistance along the way ΔP f-i The calculation formula is Where D is the equivalent diameter of the livestock and poultry house, l is the distance from the i-th ventilation window to the next ventilation window, is the correction coefficient of the resistance along the way;

[0021] The ventilation window local resistance ΔP w-i The calculation formula is Where ζ' is the local resistance coefficient of the ventilation window;

[0022] The local resistance ΔP of the chicken cage c-i The calculation formula is Where S i is the pressure drop per unit length of the chicken cage, l is the distance from the i-th ventilation window to the next ventilation window, C1 is the longitudinal viscous drag coefficient of the chicken cage, C2 is the longitudinal inertial drag coefficient of the chicken cage, and μ is the dynamic viscosity of air.

[0023] Preferably, as an improvement, in step three, the air inlet velocity v of the ventilation window for uniform air suction is first calculated and used as the initial air inlet velocity of the first ventilation window for calculation. And calculate the static pressure of the cross section inside the building corresponding to the position of the first ventilation window: Where, k is the initial opening of the designed ventilation window, ζ k is the static pressure loss coefficient at the initial opening, θ is the angle between the ventilation window and the horizontal plane;

[0024] According to the static pressure P corresponding to the position of the first ventilation window j-1 , calculate the corresponding static pressure of each ventilation window, the calculation formula is: P s-1 +P d-1 =P s-2 +P d-2 -ΔP f-1 -ΔP w-1 -ΔP c-1 .

[0025] Preferably, as an improvement, in step 4, according to the average air inlet velocity v calculated in step 3 and the static pressure P of the interior section at the location of each ventilation window, s-i , calculate the static pressure loss coefficient ζ of each ventilation window i , the calculation formula for the static pressure loss coefficient is:

[0026] Preferably, as an improvement, in step five, the opening of each ventilation window is obtained. When adjusting the opening of each ventilation window, the horizontal lateral displacement x of the segmented control rope in area one is first calculated: Where L is the distance from the traction rope to the lowest end of the ventilation window; h is the distance from the segmented control rope of area 1 to the lowest end of the ventilation window; H is the length of the traction rope in a taut state when the ventilation window is closed;

[0027] The calculation formula of the horizontal displacement distance of the segmented control rope corresponding to each area and the horizontal displacement distance of the segmented control rope corresponding to area 1 is: Where k is the opening of the ventilation windows in each area, and z is the interval length between area 1 and the segmented control ropes corresponding to each area.

[0028] This solution collects and utilizes parameters such as the cross-sectional area of the livestock house, the number of ventilation windows on a single side, the spacing between the ventilation windows, the size of the ventilation window opening, and the initial window opening. This allows accurate calculation of key ventilation parameters and the required window openings for each area of the livestock house. This avoids the problems of localized over- or under-ventilation associated with traditional centralized control of sidewall air inlets, thereby improving the suitability of the livestock house environment. This invention allows for flexible and precise adjustment of the openings of each sidewall air inlet based on the actual thermal comfort needs of livestock and poultry, and the process for adjusting the openings is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a segmented transmission device for the air inlet on the side wall of a livestock and poultry house in an embodiment of the present invention.

[0030] Figure 2 This is a flowchart of the segmented control method for the air inlet on the side wall of a livestock and poultry house in an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the segmented control rope structure of the segmented transmission device for the air inlet on the side wall of a livestock and poultry house in an embodiment of the present invention. DETAILED DESCRIPTION

[0032] The figure marks in the drawings of the specification include: side wall 1, side wall air inlet 101, control device 2, first drive member 201, main control rope 202, segmented control rope 203, traction rope 204, pulley group 3, first pulley 301, second pulley 302, second drive member 4, global control rope 401, second traction rope 402, guide plate 5.

[0033] The following is further described in detail through specific implementation methods:

[0034] As attached Figure 1 The figure shows a segmented transmission device for livestock and poultry house side wall air inlets 101, comprising multiple side wall air inlets 101, each of which is equipped with a ventilation window for controlling the opening of each air inlet. A control device 2 is connected to each ventilation window for regulating the opening and closing of each ventilation window.

[0035] Multiple side wall air inlets 101 are spaced apart on the side wall 1 of the livestock and poultry house along the extension direction of the livestock and poultry house, and the multiple side wall air inlets 101 are divided into multiple areas along the extension direction of the livestock and poultry house; a ventilation window is fixedly installed in the side wall air inlet 101 by bolts, wherein the ventilation window includes a window frame and a guide plate 5, wherein the guide plate 5 and the window frame are hingedly connected to the window frame by connecting parts such as hinges, and one side of the guide plate 5 can be rotated along the axis direction of the connecting part to adjust the opening of the ventilation window; wherein the opening of the ventilation window is controlled and adjusted by the control device 2, and a spring is provided at the bottom of the ventilation window, so that the ventilation window can automatically reset upward and close under the elastic action of the spring. The specific structure of the ventilation window is the existing technology and will not be repeated here.

[0036] The control device 2 includes a first driving member 201, a main control rope 202 and a plurality of segmented control ropes 203, wherein the first driving member 201 is located on the side of the side wall 1 of the livestock and poultry house away from the side wall air inlet 101, the output end of the first driving member 201 is connected to one end of the main control rope 202, and the other end of the main control rope 202 extends in a direction close to the side wall air inlet 101; the ends of the plurality of segmented control ropes 203 close to the first driving member 201 are connected to the ends of the main control rope 202 away from the first driving member 201, and the ends of the plurality of segmented control ropes 203 away from the main control rope 202 extend outward along the extension direction of the plurality of side wall air inlets 101 in a direction away from the first driving member 201, and the plurality of segmented control ropes 203 are connected to the main control rope 202 in a direction away from the first driving member 201. The control ropes 203 are spaced apart in the height direction below the multiple side wall air inlets 101, and the segmented control ropes 203 are parallel to each other. The end of the segmented control rope 203 away from the main control rope 202 can be connected to a winch or a counterweight. The first drive member 201 is used to drive each segmented control rope 203 to move toward or away from the first drive member 201 through the main control rope 202. The first drive member 201 can be a linear actuator such as an electric push rod, and the main control rope 202 and the segmented control ropes 203 can be steel wire ropes. The specific details of the first drive member 201 driving the segmented control ropes 203 through the main control rope 202 are prior art and will not be repeated here. This allows the movement of multiple segmented control ropes 203 to be controlled by a single first drive member 201 under the drive of a single main control rope 202, ensuring that multiple segmented control ropes 203 can move simultaneously and improving the consistency of control of multiple segmented control ropes 203.

[0037] A pulley assembly 3 is provided between the main control rope 202 and the segmented control ropes 203. The pulley assembly 3 includes a first pulley 301 and several second pulleys 302, each of which is bolted to the livestock house sidewall 1. The first pulley 301 is located at the end of the main control rope 202 away from the first drive member 201, while the several second pulleys 302 are located on the side of the first pulley 301 away from the first drive member 201. The several second pulleys 302 are distributed in a corresponding relationship with the several segmented control ropes 203 along the height of the livestock house sidewall. The pulley assembly 3 is used to change the extension direction of the segmented control ropes 203. Specifically, the several segmented control ropes 203 are diffracted onto corresponding second pulleys 302, and the several segmented control ropes 203 converge at the first pulley 301 and connect to the main control rope 202. By setting a pulley group 3 between the main control rope 202 and the segmented control rope 203, when multiple segmented control ropes 203 converge at one end of the main control rope 202, they can smoothly complete the change of extension direction while ensuring that each segmented control rope 203 can move smoothly under the drive of the main control rope 202, thereby improving the smoothness of the first driving member 201 in controlling each segmented control rope 203.

[0038] The plurality of second pulleys 302 are staggered in height along the extension direction of the plurality of side wall air inlets 101. The specific projected distance between each second pulley 302 and the first pulley 301 varies with the height of the second pulley 302. Preferably, in this embodiment, the projected distance between each second pulley 302 and the first pulley 301 increases gradually from top to bottom along the height direction. This ensures that as each segmented control rope 203 extends from its corresponding second pulley 302 toward the first pulley 301, sufficient clearance exists between the segmented control ropes 203, preventing the segmented control ropes 203 from becoming entangled and interfering with each other, thereby affecting the movement of the segmented control ropes 203.

[0039] A traction rope 204 is provided between the segmented control rope 203 and the deflector 5. One end of the traction rope 204 is fixedly connected to the deflector 5 of the ventilation window via a bolt or a buckle, and the other end of the traction rope 204 is connected to the segmented control rope 203. A steering member is bolted to the bottom of the window frame, which is used to change the extension direction of the traction rope 204. Specifically, one end of the traction rope 204 is fixedly connected to the deflector 5 of the ventilation window via a bolt or a buckle, and the other end of the traction rope 204 passes around the steering member and is connected to the segmented control rope 203. The steering member can be a pulley or other structure. The specific structure and working content of the steering member are prior art and will not be described in detail here. This allows the traction rope 204, under the action of the steering member, to convert the pulling force of the traction rope 204 at different angles into a vertical pulling force in the height direction, ensuring that the movement direction of the traction rope 204 is consistent with the opening and closing direction of the deflector 5, thereby improving the accuracy of the traction rope 204's control over the opening and closing of the deflector 5.

[0040] The segmented control ropes 203 are connected to the deflectors 5 in the side wall air inlets 101 in each area. Specifically, the segmented control ropes 203 are connected to the side wall air inlets 101 from bottom to top along the height direction, from the end closest to the first drive member 201 to the area of the side wall air inlet 101 away from the first drive member 201. That is, in this embodiment, the segmented control rope 203 at the bottom of the segmented control ropes 203 is connected to the deflectors 5 in the side wall air inlet 101 in the first area close to the first drive member 201 by a traction rope 204. The connection relationship between the remaining segmented control ropes 203 and the side wall air inlets 101 is similar. This allows the deflectors 5 in each area to be adjusted to different openings under the control of different segmented control ropes 203, ensuring that the openings of multiple ventilation windows can be adjusted to different degrees by adjusting the drive members in sequence, thereby improving the convenience of adjusting the ventilation windows on the side walls 1 of the livestock and poultry house.

[0041] The spacing between adjacent segmented control ropes 203 varies, with the spacing between the segmented control ropes 203 gradually decreasing from top to bottom along the height of the livestock house side wall 1. By adjusting the spacing between the segmented control ropes 203, the segmented control ropes 203 can be moved simultaneously and at the same distance, adjusting the openings of the corresponding ventilation windows to different degrees, ensuring precise adjustment of the ventilation window openings in each area.

[0042] The system further includes a second driver 4, which is arranged parallel to the first driver 201 along the height of the side wall of the livestock and poultry house. A global control rope 401 is connected to the output end of the second driver 4. One end of the global control rope 401 is connected to the output end of the second driver 4, and the other end of the global control rope 401 extends in the same direction as the segmented control rope 203. The global control rope 401 is connected to the deflector 5 in each side wall air inlet via a second traction rope 402. Specifically, two second traction ropes 402 are provided on each deflector 5: one second traction rope 402 is used to connect the deflector 5 of the ventilation window to the segmented control rope 203, and the other second traction rope 402 is used to connect the deflector 5 of the ventilation window to the global control rope 401. The second driver 4 and the global control rope 401 are used to globally control the deflectors 5 in all side wall air inlets 101. The specific selection of the second driver 4 can be the same as that of the first driver 201. When special requirements such as high temperature are met, the second driving member 4 can drive the global control rope 401 to perform global and unified adjustment on the opening and closing size of the air inlet window on the side wall 1 of the livestock and poultry house, ensuring that when a large amount of air is required, the second driving member 4 and the global control rope 401 can be used for rapid control and adjustment, thereby improving the convenience of controlling the air inlet window on the side wall 1 and reducing the workload of controlling the air inlet window.

[0043] The global control rope 401 is located above the several segmented control ropes 203, and the second driving member 4 is located at the same height as the global control rope 401. This allows the global control rope 401 to be separated from the several segmented control ropes 203, preventing interference between the global control rope 401 and the segmented control ropes 203, which could affect the smoothness of global and individual control of the air intake windows. Furthermore, positioning the global control rope 401 above the segmented control ropes 203 reduces the distance between the global control rope 401 and the air intake windows, relative to the traction ropes 204. This allows the global control rope 401 to fully open all the air intake windows with a shorter travel distance, improving the convenience of opening the air intake windows in special circumstances.

[0044] The present invention also intends to provide a segmented control method for the air inlet 101 on the side wall of a livestock and poultry house, which is applicable to the segmented transmission device for the air inlet on the side wall of a livestock and poultry house, as shown in the attached figure. Figure 2 As shown, the following steps are included:

[0045] Step 1. Collect environmental data parameters of the livestock and poultry house. Specifically, based on the configuration of the designed livestock and poultry house, the geometric dimensions of the livestock and poultry house, the cross-sectional area A of the livestock and poultry house, the number n of all ventilation windows on one side of the livestock and poultry house, the ventilation window spacing, the ventilation window opening size, the designed ventilation window initial opening k, the static pressure loss coefficient at each ventilation window opening, and the livestock and poultry house ventilation volume Q under the designed working conditions are collected. When collecting various parameters of the livestock and poultry house, they can be obtained through actual measurement, experiments, etc. The specific content of collecting various parameters is existing technology and will not be repeated here.

[0046] Step 2: Based on the environmental data parameters collected in step 1, calculate the average wind speed v in the room where each ventilation window is located. i , dynamic pressure P of the internal section d-i , along-the-line resistance ΔP f-i , ventilation window local resistance ΔP w-i and the local resistance of the cage ΔP c-i Perform calculations;

[0047] In step 2, the average wind speed v in the room at the location of each ventilation window is i When calculating, the average wind speed v in the section at each ventilation window is calculated based on the cross-sectional area A of the livestock and poultry house collected in step 1, the number of all ventilation windows on one side of the livestock and poultry house n, and the ventilation volume Q of the livestock and poultry house under the design working conditions. i Calculate the average wind speed v in the room where each ventilation window is located. i When calculating, first calculate the average wind speed v1 of the section inside the livestock and poultry house at the location of the first ventilation window at the end of the livestock and poultry house, and the average wind speed v2 of the section inside the livestock and poultry house at the location of the first ventilation window at the end of the livestock and poultry house The average wind speed in the building section at the location of the i-th ventilation window Specifically, the first ventilation window at one end of the livestock and poultry house close to the fan is the first ventilation window, and the other ventilation windows are set as the second ventilation window and the third ventilation window in sequence.

[0048] After calculating the average wind speed of the section inside the building at the location of each ventilation window, the calculated v i Dynamic pressure P of each ventilation window in the room d-i Calculation is performed, where the dynamic pressure P of the inner section is d-n The calculation formula is: Where ρ is the air density (unit kg / m 3 ).

[0049] In step 2, the resistance ΔP along the way is f-i When calculating, the resistance along the way ΔP f-i The calculation formula is Specific ΔP f-i is the resistance along the path between the i-th ventilation window and the i+1-th ventilation window; where D is the equivalent diameter of the livestock and poultry house section. For non-circular pipes, the ratio of 4 times the cross-sectional area to the cross-sectional wetted perimeter is taken. is the correction coefficient of the resistance along the way.

[0050] In step 2, the local resistance ΔP of the ventilation window is w-i (i.e. the local resistance of the ventilation window to the passage inside the house) Where ζ' is the local resistance coefficient of the ventilation window.

[0051] In step 2, the local resistance ΔP of the chicken cage is also c-i When performing calculations, the calculation formula is

[0052] Where S i is the pressure drop per unit length of the chicken cage, l is the distance from the i-th ventilation window to the next ventilation window, C1 is the longitudinal viscous drag coefficient of the chicken cage, C2 is the longitudinal inertial drag coefficient of the chicken cage, and μ is the dynamic viscosity of air. The specific values of C1, C2 and μ can be obtained by measurement, etc., and their specific values are not repeated here.

[0053] Step 3: Based on the ventilation volume of the livestock and poultry house under the design working conditions collected in step 1 and the air inlet area A of the ventilation window w Calculate the uniform air intake velocity v of each ventilation window and the static pressure P of the internal section at the location of each ventilation window. s-i The specific calculation formula for calculating the air inlet velocity v of each ventilation window is: This is used as the initial air inlet velocity of the first ventilation window, and the static pressure loss coefficient at the initial opening of the ventilation window is used to calculate the static pressure of the interior section corresponding to the first ventilation window position. The calculation formula is: Where A w is the air inlet area of a single ventilation window, k is the initial opening of the designed ventilation window, ζ k is the static pressure loss coefficient at the initial opening, and θ is the angle between the ventilation window and the horizontal plane.

[0054] The static pressure P corresponding to the first ventilation window position is calculated. j-1 Then, the Bernoulli equation P of each ventilation window is established. s-1 +P d-1 =P s-2 +P d-2 -ΔP f-1 -ΔP w-1 -ΔP c-1The static pressure of the next ventilation window position is calculated based on the static pressure of the previous ventilation window, and the static pressure of the air inlet positions of all ventilation windows are calculated in this way. The specific process of calculating the static pressure of each ventilation window position by the Bernoulli equation is an existing technology and will not be repeated here.

[0055] Step 4: Based on the average air inlet velocity v calculated in step 3 and the static pressure P of the interior section at the location of each ventilation window, s-i , calculate the static pressure loss coefficient ζ of each ventilation window i ; Specifically in the static pressure loss coefficient ζ i During the calculation, since the opening of the first ventilation window is determined to be k, there is no need to adjust the static pressure loss coefficient ζ1 of the first ventilation window. Therefore, when adjusting the static pressure loss coefficient ζ i The calculation starts from the static pressure loss coefficient ζ2 of the second ventilation window, where the calculation formula for the static pressure loss coefficient is: For example, the calculation formula for the static pressure loss coefficient ζ2 of the second ventilation window is

[0056] Step 5: According to the static pressure loss coefficient ζ of each ventilation window obtained in step 4 i By comparing the relationship between the ventilation window opening and the static pressure loss coefficient, the opening of each ventilation window can be determined, and thus the distance between the segmented control ropes in each area can be determined.

[0057] In step five, when adjusting the opening of each ventilation window, the driving member pulls each segmented control rope 203, causing the segmented control rope 203 to move forward and backward along the extension direction of each ventilation window, thereby driving the movement of the traction rope 204. During the movement, the traction rope 204 drives the guide plate 5 of the ventilation window to move and complete the adjustment of the ventilation window opening. Specifically, the length of the ventilation window traction rope 204 extending from the closed state to the fully open state is L, and the horizontal displacement of the segmented control rope 203 is x, where the calculation formula for the horizontal displacement distance x of the segmented control rope 203 is: The distance between the ventilation window traction rope 204 and the lowest end of the ventilation window is L; the ventilation windows in the first area of the livestock and poultry house close to the fan are area one, and the ventilation windows in the remaining areas are area two, area three, etc. according to their arrangement positions. The distance between the segmented control rope 203 of area one and the lowest end of the ventilation window is h. The ventilation window traction rope 204 is in a taut state when the ventilation window is closed, and its length is H.

[0058] Therefore, according to the determined distance h between the lower edge of the ventilation window and the segmented control rope 203 corresponding to area 1 and the required opening k of the ventilation window in each area, when the ventilation window opening is k, the length of the ventilation window pulling rope 204 extended is H+k L, assuming that the ventilation window opening in area 1 is k1, and the ventilation window openings in areas 2, 3, and 4 are k2, k3, and k4 respectively, the horizontal lateral displacement distance of the segmented control rope 203 corresponding to each area and the horizontal lateral displacement distance of the segmented control rope 203 corresponding to area 1 are calculated as follows: Wherein z is the interval length between area 1 and the segmented control ropes 203 corresponding to each area.

[0059] Specifically, as attached Figure 3 As shown, in this embodiment, the interval length between the segmented control ropes 203 corresponding to area 1 and area 2 is a, the interval length between the segmented control ropes 203 corresponding to area 1 and area 3 is b, the interval length between the segmented control ropes 203 corresponding to area 1 and area 4 is c, and so on. After determining the opening k and h, the corresponding formula between the segmented control ropes 203 corresponding to each area is as follows:

[0060] Calculation of the segmented control rope 203 for area 1 and area 2:

[0061]

[0062] Calculation of the control rope 203 for area 1 and area 3:

[0063]

[0064] Calculation of the corresponding segmented control rope 203 for area 1 and area 4:

[0065]

[0066] The calculation formulas for the corresponding relationships between the segmented control ropes 203 in other areas can be deduced from the above calculation formulas, and will not be repeated here.

[0067] For example, when the opening of the ventilation window in area 1 reaches the maximum, the displacement is x. According to the opening k2 of the ventilation window in area 2, preferably in this embodiment, the opening of the ventilation window in area 2 is 50%. The horizontal displacement of the segmented control rope 203 in area 2 is equal to the horizontal displacement x of the segmented control rope 203 corresponding to the fully opened area 1. The ventilation window traction rope 204 extends L / 2 from the closed state to the fully opened state. The calculation formula of the horizontal displacement distance x of the segmented control rope 203 can be used to calculate the translation distance calculation formula of area 2. The interval a between area 1 and area 2 can be obtained. Since the segmented control rope 203 of area 1 and the segmented control rope 203 of area 2 are both controlled by a main control rope 202, the above calculation formula can be used to obtain Thus, the distance a between the segmented control rope 203 corresponding to area 1 and the segmented control rope 203 corresponding to area 2 can be calculated.

[0068] In the same application scheme (chicken house), twenty-eight side wall air inlets 101 and corresponding ventilation windows (specifications 0.6m*0.3m) are evenly arranged on the side wall 1 (single wall) of the chicken house, and the distance between adjacent ventilation windows is 3.5m. One is to use the scheme in this embodiment to control the opening of the side wall air inlet 101, the second is to use the existing conventional opening control method 1 to perform equal opening control operation, and the third is to use the existing conventional opening control method 2 to operate in an opening increasing manner. The actual measured results in the chicken house involving each method show that: after the opening is regulated by the scheme in this embodiment, the maximum wind speed difference is 0.67 and the wind speed unevenness is 4.02%; after the equal opening control operation is performed by the existing conventional opening control method 1, the maximum wind speed difference is 2.17m / s, and the wind speed unevenness is 16.67%; after the existing conventional opening control method 2 is operated in an opening increasing manner, the maximum wind speed difference is 1.21m / s, and the wind speed unevenness is 8.38%. It can be seen that the opening control method in the embodiment has good feasibility and high accuracy and control precision.

[0069] Compared to existing technologies, this solution accurately calculates key ventilation parameters and the required window openings for each area of the livestock house by collecting parameters such as the cross-sectional area of the livestock house, the number of ventilation windows on a single side of the livestock house, the spacing between the ventilation windows, the size of the ventilation window openings, and the initial window openings. This avoids the problems of localized over- or under-ventilation caused by the unified control of traditional side wall air inlets, thereby improving the suitability of the livestock house environment. This invention allows for flexible and precise adjustment of the openings of each side wall air inlet based on the actual thermal comfort needs of livestock and poultry, and the operation process for implementing the opening adjustment is simple and convenient.

[0070] It should be noted that those skilled in the art may make a number of variations and improvements without departing from the technical solution of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed by this application shall be based on the content of the claims, and the specific embodiments and other descriptions in the specification may be used to interpret the content of the claims.

Claims

1. A segmented transmission device for a livestock and poultry house side wall air inlet, comprising a plurality of side wall air inlets, the plurality of side wall air inlets being spaced apart along an extension direction of the livestock and poultry house side wall, the plurality of side wall air inlets being divided into a plurality of zones along the extension direction of the livestock and poultry house; ventilation windows being provided in the side wall air inlets, the ventilation windows being connected to a control device, the control device being located on the side wall on the same side as the side wall air inlet, the control device being used to control the opening of the ventilation windows; and characterized in that: The control device includes a first driving member, a main control rope and several segmented control ropes. The first driving member is located on the side of the side wall of the livestock and poultry house away from the side wall air inlet. The output end of the first driving member is connected to one end of the several segmented control ropes close to the first driving member through the main control rope. The ends of the several segmented control ropes away from the main control rope extend outward along the extension direction of the multiple side wall air inlets. The several segmented control ropes and the ventilation windows in the side wall air inlets of each area are connected to each other through traction ropes; the first driving member is used to drive the several segmented control ropes to move along its own extension direction through the main control rope, and the segmented control ropes are used to control the opening of the ventilation windows through the traction ropes.

2. The segmented transmission device for the air inlet on the side wall of a livestock and poultry house according to claim 1 is characterized in that: A pulley block is provided between the main control rope and the segmented control rope, and the pulley block is used to change the extension direction of the segmented control rope.

3. The segmented transmission device for the air inlet on the side wall of a livestock and poultry house according to claim 1 is characterized in that: It also includes a second driving member, which is distributed parallel to the first driving member along the height direction on the side wall of the livestock and poultry house, and the output end of the second driving member is connected to a global control rope; one end of the global control rope is connected to the output end of the second driving member, and the extension direction of the other end of the global control rope is consistent with the extension direction of the segmented control rope. The global control rope is connected to each ventilation window through a second traction rope, and the second driving member is used to perform global and unified control of the opening of all ventilation windows through the global control rope.

4. The segmented transmission device for the air inlet on the side wall of a livestock and poultry house according to claim 1, characterized in that: The global control rope is located between the several segmented control ropes and the ventilation windows, so that the global control rope and the several segmented control ropes can be separated from each other, and the global control rope is arranged above the segmented control ropes.

5. A control method using the segmented transmission device for the air inlet on the side wall of a livestock and poultry house according to any one of claims 1 to 4, characterized in that: The following steps are involved: Step 1: Collect environmental data parameters of the livestock and poultry house, including the number of all ventilation windows on one side of the livestock and poultry house n, the cross-sectional area A of the livestock and poultry house, the air density ρ, the ventilation volume Q of the livestock and poultry house under the design working conditions, the equivalent diameter D of the livestock and poultry house cross section, and the air inlet area A of a single ventilation window. w ; Step 2: Based on the environmental data parameters collected in step 1, calculate the average wind speed v in the room at the location of the i-th ventilation window. i , dynamic pressure P of the internal section d-i , along-the-line resistance ΔP f-i , ventilation window local resistance ΔP w-i and the local resistance of the cage ΔP c-i Perform calculations; Step 3: Based on the environmental data parameters collected in step 1, calculate the air intake velocity v of each ventilation window and the static pressure P of the room section at the location of the first ventilation window. s-1 , calculate the static pressure P of the interior section at each ventilation window location in turn s-i ; Step 4: Based on the uniform air intake velocity v of each ventilation window calculated in step 3 and the static pressure P of the internal section at the location of each ventilation window, s-i , calculate the static pressure loss coefficient ζ of each ventilation window i ; Step 5: According to the static pressure loss coefficient ζ of each ventilation window obtained in step 4 i By comparing the relationship between the ventilation window opening and the static pressure loss coefficient, the opening of each ventilation window can be determined, and thus the distance between the segmented control ropes in each area can be determined.

6. The control method according to claim 5, characterized in that: In step 2, the average wind speed v in the cross section of the house is n When calculating, first calculate the average wind speed v1 of the first ventilation window at the end of the livestock and poultry house Then, the average wind speed in the room at the location of the i-th ventilation window is Where A is the cross-sectional area of the livestock and poultry house, n is the number of ventilation windows on one side of the livestock and poultry house, and Q is the ventilation volume of the livestock and poultry house under the design working conditions; Dynamic pressure P of the internal section at the location of each ventilation window d-i The calculation formula is: Where ρ is the air density; The resistance along the way ΔP f-i The calculation formula is Where D is the equivalent diameter of the livestock and poultry house, l is the distance from the i-th ventilation window to the next ventilation window, is the correction coefficient of the resistance along the way; The ventilation window local resistance ΔP w-i The calculation formula is Where ζ' is the local resistance coefficient of the ventilation window; The local resistance ΔP of the chicken cage c-i The calculation formula is Where S i is the pressure drop per unit length of the chicken cage, l is the distance from the i-th ventilation window to the next ventilation window, C1 is the longitudinal viscous drag coefficient of the chicken cage, C2 is the longitudinal inertial drag coefficient of the chicken cage, and μ is the dynamic viscosity of air.

7. The control method according to claim 5, characterized in that: In step 3, first calculate the air inlet velocity v of the ventilation window for uniform air intake and use it as the initial air inlet velocity for the first ventilation window: And calculate the static pressure of the cross section inside the building corresponding to the position of the first ventilation window: Where, k is the initial opening of the designed ventilation window, ζ k is the static pressure loss coefficient at the initial opening, θ is the angle between the ventilation window and the horizontal plane; According to the static pressure P corresponding to the position of the first ventilation window j-1 , calculate the corresponding static pressure of each ventilation window, the calculation formula is: P s-1 +P d-1 =P s-2 +P d-2 -ΔP f-1 -ΔP w-1 -ΔP c-1 .

8. The control method according to claim 5, characterized in that: In step 4, according to the average air inlet velocity v calculated in step 3 and the static pressure P of the interior section at the location of each ventilation window, s-i , calculate the static pressure loss coefficient ζ of each ventilation window i , the calculation formula for the static pressure loss coefficient is:

9. The control method according to claim 5, characterized in that: In step five, the opening of each ventilation window is obtained. When adjusting the opening of each ventilation window, the horizontal displacement x of the segmented control rope in area one is first calculated: Where L is the distance from the traction rope to the lowest end of the ventilation window; h is the distance from the segmented control rope of area 1 to the lowest end of the ventilation window; H is the length of the traction rope in a taut state when the ventilation window is closed; The calculation formula of the horizontal displacement distance of the segmented control rope corresponding to each area and the horizontal displacement distance of the segmented control rope corresponding to area 1 is: Where k is the opening of the ventilation windows in each area, and z is the interval length between area 1 and the segmented control ropes corresponding to each area.

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