A wet curtain, fan and air pipe positive pressure air blowing cooling system of a semi-open sheep house

Abstract

The utility model discloses a kind of wet curtain, fan and wind pipe positive pressure air blowing cooling system of semi-open sheep house, comprising: semi-open sheep house, wet curtain, fan, variable diameter pipe and wind pipe;Single strip of sheep activity area in semi-open sheep house is enclosed by two ends of sheep house gable installed on sheep house ground and two sides of sheep house roller blind four sides;Fan mounting hole is opened on sheep house gable, wet curtain is fixed on the outside of fan mounting hole of sheep house gable, wet curtain is connected with water pump inner circulation system, fan is fixed in fan mounting hole, the inside of fan mounting hole is connected with wind pipe, and the length of wind pipe covers sheep activity area.The wet curtain and fan of the utility model are split type, fan can select high full pressure fan, and wet curtain can be matched with suitable area.

Description

Technical Field

[0001] This utility model belongs to the technical field of livestock and poultry breeding facilities, specifically a positive pressure cooling system for a semi-open sheepfold, consisting of a wet curtain, a fan, and air ducts. Background Technology

[0002] Summers are hot in southern regions and parts of northern China. Sheep pens, often semi-open structures, typically have solid walls at the gable ends but no walls at the longitudinal sides. Some pens have roller blinds in these areas, while others do not. Sheep management is relatively extensive, and there are generally no additional cooling measures in the pens during summer. Temperatures inside sheep pens in southern regions can reach over 40°C. Sheep, especially lambs (particularly Hu sheep), have long, dense wool, which hinders heat dissipation in summer. In high-temperature environments, heat stress leads to reduced feed intake and slower growth in sheep during the growing season, along with extremely high respiratory rates (up to 200 breaths per minute). This results in decreased conception rates in breeding ewes, increased abortion rates, and decreased semen quality in rams, severely impacting farm productivity and animal welfare. Sheep are also sensitive to humidity; humidity levels exceeding 80% are detrimental to controlling the development and spread of parasites. Therefore, spraying and misting methods used for cattle are unsuitable for sheep pens. Common evaporative cooling systems using evaporative cooling pads and fans are suitable for enclosed sheep pens, but not for semi-open sheep pens. While integrated evaporative cooling systems have been used in beef cattle and pig pens, initial trials in semi-open sheep pens have revealed the following potential problems: 1. During trials, it was found that the fans in existing integrated evaporative cooling systems generally have low total pressure. For sheep pens tens to nearly a hundred meters long, the airflow distance between the evaporative cooling system and the ductwork is insufficient. 2. During installation, top-discharge and bottom-discharge evaporative cooling systems often require elbows to place the ductwork above the sheep pen, significantly increasing air resistance during air delivery. This results in a lower airflow velocity reaching the sheep, while sheep with long, thick wool require higher airflow velocities in summer to alleviate heat stress. 3. During operation, the airflow and evaporative cooling pad area of ​​the integrated evaporative cooling system may not be properly matched, potentially leading to poor cooling performance. Therefore, existing integrated evaporative cooling systems are insufficient for cooling long, semi-open sheep pens in summer. Regarding duct configuration, the installation height of the ducts above the sheep pens affects the airflow reaching the sheep. If installed too high, the airflow to the sheep is too low to meet cooling needs; if installed too low, the sheep will chew on the ducts. With a constant duct diameter along its length and unchanged outlet size and spacing, the airflow velocity is high at the front section of the duct near the fan, but the velocity deviates significantly from the vertical downward direction, making the sheep below the outlet feel no airflow. The airflow velocity at the rear of the duct is lower than at the front. Therefore, to ensure that the airflow to the sheep in the pen is roughly equal from the front to the rear of the duct, the spacing and structure of the outlets need to be adjusted.

[0003] The utility model patent for "A wet curtain air cooler for animal husbandry" with Chinese patent application number 202021087330.6 is mainly used for deodorizing animal houses and is not suitable for semi-open sheep houses with positive pressure air cooling.

[0004] The Chinese utility model patent with patent application number 201811485279.1, entitled "A Precision Air Delivery System and Method for Pig Houses Using Fiber Air Ducts", is mainly used for ventilation in pig houses and is not suitable for cooling in semi-open sheep houses.

[0005] The utility model patent for "A Wet Curtain Cooling Machine" with Chinese patent application number 202420281608.5 is also a machine that integrates wet curtain and fan. If it is used for cooling in semi-open sheep pens, the overall cooling effect may be poor after being matched with air ducts. Utility Model Content

[0006] To address the problems existing in the background technology and to reduce heat stress for sheep in semi-open sheepfolds in high-temperature areas during summer, this utility model provides a positive pressure cooling system for semi-open sheepfolds, consisting of evaporative cooling pads, fans, and ductwork. The technical solution includes: a semi-open sheepfold, evaporative cooling pads, fans, reducing pipes, and ductwork. The semi-open sheepfold includes: sheepfold roller blinds, sheepfold gable walls, sheep activity areas, and sheepfold floors. Each strip-shaped sheep activity area is enclosed by sheepfold gable walls at both ends and sheepfold roller blinds on both sides installed on the sheepfold floor.

[0007] There are fan mounting holes in the gable wall of the sheepfold. A wet curtain is fixed on the gable wall outside the fan mounting holes. The wet curtain is connected to the water pump internal circulation system. The fan is fixed in the fan mounting hole. The inside of the fan mounting hole is connected to the air duct. The air duct covers the length of the sheep activity area.

[0008] Feeding walkways are provided between adjacent sheep activity areas.

[0009] The bottom of the fan is 1.5 to 1.8 meters above the ground inside the sheepfold.

[0010] The wet curtain is attached to the outside of the fan and fixed to the sheepfold wall by the mounting plate below the wet curtain through the triangular fixing bracket. The two sides of the wet curtain are fixed to the sheepfold wall by the hanging ears.

[0011] The fan outlet is connected to the air duct via a reducer.

[0012] The ventilation ducts are fixed to the roof beams inside the sheepfold via hooks and steel wire ropes.

[0013] The lower part of the air duct has an air outlet, and several cuffs are installed at the air outlet.

[0014] The cuffs of the ventilation ducts are arranged longitudinally along the sheepfold in one, two, or three rows; the cuffs are perpendicular to the ground or at an angle to the ground.

[0015] The lower end of the cuff has a rolled-up section.

[0016] The cuffs are divided into large-pitch cuff sections and small-pitch cuff sections, with the front section closest to the fan being the large-pitch cuff section. The distance between adjacent cuffs in the large-pitch cuff section is 0.7 meters to 1.4 meters, while the distance between adjacent cuffs in the small-pitch cuff section is 0.3 meters to 0.6 meters.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. Measures to reduce heat stress in sheep in semi-open sheep pens.

[0019] 2. In this utility model, the wet curtain and the fan are separate units. The fan can be a high-pressure fan, and the wet curtain can be matched with a suitable area.

[0020] 3. In this utility model, the air outlets of the air duct are spaced further apart at the front section near the fan and at the rear section, so that the amount of air blown on sheep at different positions along the length of the air duct is as equal as possible.

[0021] 4. In this utility model, the air outlet of the air duct is fitted with a cuff, which can adjust the inclined airflow to be vertically downward. This not only makes the wind speed on the sheep's body greater, but also allows the cuff to be rolled up as the sheep grows taller, preventing the sheep from biting it. Attached Figure Description

[0022] Figure 1 This is a top view schematic diagram of an embodiment of a positive pressure cooling system for a semi-open sheepfold, consisting of a wet curtain, a fan, and air ducts.

[0023] Figure 2 This is a frontal view of an embodiment of the present utility model.

[0024] Figure 3 This is a schematic diagram of the sheepfold gable wall viewed from the outside of an embodiment of this utility model.

[0025] In the diagram: 1-wet curtain, 2-fan, 3-air duct, 4-sheep pen roll-up curtain, 5-sheep pen gable wall, 6-sheep activity area, 7-feeding walkway, 8-reducing pipe, 9-sheep pen floor, 11-cuff, 10-tripod fixing frame, 12-hook, 14-fan mounting hole, 110-large spacing cuff, 111-small spacing cuff. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings.

[0027] like Figure 1 , Figure 2 and Figure 3The embodiment shown includes: a semi-open sheepfold, a wet curtain 1, a fan 2, a reducer 8, an air duct 3, an adjustable length cuff 11, a tripod bracket 10 for the wet curtain water pump internal circulation module, and a fixing lug 12 for the wet curtain water pump internal circulation module.

[0028] The semi-open sheepfold includes: sheepfold curtain 4, sheepfold gable wall 5, sheep activity area 6, and sheepfold floor 9. The single strip-shaped sheep activity area 6 is surrounded by the sheepfold gable wall 5 at both ends and the sheepfold curtain 4 on both sides installed on the sheepfold floor 9. Feeding walkways 7 are provided between adjacent sheep activity areas 6.

[0029] A fan mounting hole 14 is opened on the gable wall 5 of the sheepfold. A wet curtain 1 is fixed on the gable wall 5 of the sheepfold outside the fan mounting hole 14. The wet curtain 1 is connected to the water pump internal circulation system. The fan 2 is fixed in the fan mounting hole 14. The inside of the fan mounting hole 14 is connected to the air duct 3. The air duct 3 covers the length of the sheep activity area 6 and is located above the sheep activity area 6.

[0030] The installation height of the fan 2 is determined according to the height of the sheep in the sheepfold. In this embodiment, the bottom of the fan 2 is 1.5 meters to 1.8 meters above the ground 9 in the sheepfold.

[0031] The wet curtain 1 is attached to the outside of the fan 2 and is fixed to the sheepfold wall 5 by the lower mounting plate of the wet curtain 1 through the triangular fixing bracket 10. The two sides of the wet curtain 1 are fixed to the sheepfold wall 5 by the hanging ears 12. The wet curtain 1 and the water pump internal circulation system used in this embodiment are mature products on the market. The water pump internal circulation system consists of a water pump, wet curtain, internal circulation water tank, float ball, water pipe, etc. The water pump is connected to the sheep farm's 220V power supply and switch, and the water pipe is connected to the sheep farm's water supply pipe. The water pump and fan can be turned on or off by manual switch or automatic controller according to the temperature, humidity or time inside and outside the sheepfold.

[0032] In this embodiment, the size of the air outlet of the fan 2 is inconsistent with the diameter of the air duct 3. In this case, a reducing pipe 8 is connected in the middle, and the air duct 3 and the reducing pipe 8 are tied together with cable ties. The air outlet of the fan 2 and the reducing pipe 8 are fixed with flanges. The air duct 3 can be made of fiber cloth. The air duct 3 can be fixed to the roof beam in the sheepfold with steel wire rope by hooks.

[0033] The lower part of the air duct 3 has an air outlet, and several cuffs 11 are installed at the air outlet. The length of the cuffs 11 can be 20cm, or a different size can be used. The cuffs 11 are sewn together with the air duct 3 at the air outlet. The lower end of the cuffs 11 has a roll-up part (not shown in the figure), and the length of the roll-up part can be manually adjusted.

[0034] The cuffs 11 have two types of spacing: large-spacing cuffs 110 and small-spacing cuffs 111. The front section near the fan 2 is the large-spacing cuff 110. The spacing between adjacent cuffs 11 in the large-spacing cuff 110 is any value between 0.7 meters and 1.4 meters (specifically 1 meter). The spacing between adjacent cuffs 11 in the small-spacing cuff 111 is any value between 0.3 meters and 0.6 meters (specifically 0.5 meters).

[0035] The cuffs 11 of the air duct 3, which are set along the longitudinal direction of the sheepfold, can be in one, two, or three rows, depending on the width of the sheep activity area in the sheepfold and the position of the air duct 3. The cuffs 11 can also be perpendicular to the ground or at a certain angle to the ground. The diameter of the cuffs 11 can be several tens of millimeters.

[0036] The diameter of the duct 3 can be several hundred millimeters, and the length of the duct 3 can be tens of meters. Since the duct 3 covers the length of the sheep activity area 6, if the total length of the sheepfold is nearly 100 meters, a set of wet curtain 1, fan 2, reducer 8 and duct 3 can be installed on the gable walls of the sheepfold at both ends of a row of sheep pens; if the total length of the sheepfold is less than 45 meters, a set of wet curtain 1, fan 2, reducer 8 and duct 3 can be installed on the gable wall of the sheepfold at one end of a row of sheep pens.

[0037] In this embodiment, the air volume of fan 2 is 10,000 to 20,000 m³ / s. 3 / h, voltage is 380V, total pressure of the fan is above 250Pa. Fan 2 is connected to the sheep farm's AC380V power supply. A switch is installed between the main power supply and fan 2, which can conveniently provide power to fan 2, and can also cut off the power circuit during maintenance to protect personal safety.

[0038] In this embodiment, the sheepfold curtain 4 needs to be closed during the cooling system operation period.

[0039] The workflow of this embodiment is as follows:

[0040] After sunrise or after staff arrive at work, close the sheepfold curtain 4 and turn on the cooling system (start the fans first), with the fans 2 blowing air towards the sheepfold. During operation, staff should turn the fans and water pumps in the internal circulation system on or off as needed, based on the temperature and humidity inside and outside the sheepfold. Specifically, after sunrise, the temperature inside the sheepfold will increase, even exceeding 40℃ at noon, so both the fans and water pumps need to be turned on. If the ambient humidity is too high, it will affect the wool's water absorption; in this case, turn off the water pump circulation system (water pumps), and the residual moisture in the wet curtains will be quickly removed, allowing only dry air to be blown out for cooling the sheepfold.

[0041] After sunset or after staff leave work, turn off the cooling system and open the sheepfold curtains.

Claims

1. A positive pressure cooling system for a semi-open sheepfold, consisting of evaporative cooling pads, fans, and ductwork, characterized in that: include: Semi-open sheepfold, wet curtain (1), fan (2) and air duct (3); The semi-open sheepfold includes: sheepfold curtain (4), sheepfold gable wall (5), sheep activity area (6), and sheepfold floor (9). The single strip-shaped sheep activity area (6) is surrounded by the sheepfold gable wall (5) at both ends and the sheepfold curtain (4) on both sides installed on the sheepfold floor (9). There is a fan installation hole (14) on the sheepfold gable wall (5). A wet curtain (1) is fixed on the sheepfold gable wall (5) outside the fan installation hole (14). The wet curtain (1) is connected to the water pump internal circulation system. The fan (2) is fixed in the fan installation hole (14). The inside of the fan installation hole (14) is connected to the air duct (3). The air duct (3) covers the length of the sheep activity area (6).

2. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 1, characterized in that, Feeding walkways (7) are provided between adjacent sheep activity areas (6).

3. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 1, characterized in that, The bottom of the fan (2) is 1.5 to 1.8 meters above the ground (9) inside the sheepfold, and the air duct (3) is located above the sheep activity area (6).

4. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 1, characterized in that, The wet curtain (1) is attached to the outside of the fan (2). The wet curtain (1) is fixed to the sheepfold wall (5) by the triangular fixing bracket (10) through the mounting plate below the wet curtain (1). The two sides of the wet curtain (1) are fixed to the sheepfold wall (5) through the hanging ears (12).

5. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 1, characterized in that, The air outlet of the fan (2) is connected to the air duct (3) through the reducer (8).

6. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 1 or 5, characterized in that, The air duct (3) is fixed to the roof beam inside the sheepfold by hooks and steel wire rope.

7. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 1, characterized in that, The air duct (3) has an air outlet at the bottom, and several cuffs (11) are installed at the air outlet.

8. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 7, characterized in that, The cuffs (11) of the ventilation duct (3) are arranged in one, two or three rows along the longitudinal direction of the sheepfold; the cuffs (11) are oriented perpendicular to the ground or at an angle to the ground.

9. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to claim 7, characterized in that, The lower end of the cuff (11) is provided with a rolled-up part.

10. The wet curtain, fan, and duct positive pressure cooling system for a semi-open sheepfold according to any one of claims 7 to 9, characterized in that, The cuffs (11) are divided into large-pitch cuffs (110) and small-pitch cuffs (111), with the front section near the fan (2) being the large-pitch cuffs (110). The distance between adjacent cuffs (11) in the large-pitch cuffs (110) is 0.7 meters to 1.4 meters, and the distance between adjacent cuffs (11) in the small-pitch cuffs (111) is 0.3 meters to 0.6 meters.

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