Positive pressure and negative pressure combined precise ventilation hog house

Abstract

The utility model relates to a positive pressure and negative pressure combined precise ventilation hog house, which comprises a hog house body, a suspended ceiling is arranged in the hog house body, the internal space of the hog house body is divided into an upper ventilation area and a lower breeding area by the suspended ceiling, a plurality of ceiling windows are arranged on the suspended ceiling, and the suspended ceiling is connected with the hog house body. The ceiling window is communicated with the ventilation area and the breeding area. The utility model provides a ventilation system with combined use of positive and negative pressure fans, which not only can reduce the temperature in a pig house in a large area and remove dust, but also can enable fresh air to be accurately and uniformly blown away on the body surfaces of pigs, so that the air quality in the pig house is kept at a better level, and the ventilation quantity and the energy consumption are reduced while the effective wind speed is not reduced. The wind speed, the pressure and the temperature in the pig house are distributed more uniformly, and the phenomenon of heat accumulation or local supercooling of a traditional pig house is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pig house ventilation systems, in particular to a positive and negative pressure combined precision ventilation pig house. Background Art

[0002] Pig house ventilation has developed along with the scale, intensiveness and industrialization of pig farming. From traditional open farming by individual households to today's high-density closed farming, ventilation is becoming more and more important, which directly affects the healthy growth of pigs. The purpose of pig house ventilation is to provide a uniform and comfortable temperature, humidity environment and sufficient oxygen for dense pigs. Through ventilation and exhaust, the concentration of ammonia and carbon dioxide in the pig house can be reduced, thereby improving the comfort of pigs and increasing feed intake.

[0003] In the actual pig house construction and application process, there are problems such as poor airtightness of the building structure, low surface wind speed within the pig activity space, and uneven temperature distribution. This leads to large differences in the fresh air that pigs breathe, ineffective fresh air in the respiratory tract, and the failure to timely exchange and discharge harmful gases out of the house, which brings about pig biosafety problems. Ordinary longitudinal ventilation accounts for the largest proportion of breeding ventilation modes. Since my country entered intensive breeding, most pig farms have been using this single-point air inlet and single-point air outlet ventilation mode. The ordinary longitudinal ventilation mode adopts a water curtain + fan ventilation mode. The cooling range is limited in high temperature and high humidity areas in summer. In addition, the longitudinal horizontal ventilation in the pig house means that most of the wind flows away from the pig pen, and the effective wind flowing through the pig pen is small, the utilization rate of fresh air is low, and the wind cooling effect is not reflected. In order to maintain the temperature in the pig house in winter, doors and windows are closed to keep warm, resulting in extremely poor environmental quality in the pig house. The pig house close to the fan has poor ventilation, which can easily lead to excessive ammonia and carbon dioxide, etc., which increases the chance of pigs getting sick in winter. The ceiling ventilation method, because the fan is on the side wall of the pig house, during the overall ventilation process, the wind is discharged as a whole or longitudinally, which is not suitable for longer pig houses. The width of the currently designed pig houses is generally not more than 30 meters. This ventilation mode is not suitable for the southern region and large-scale breeding. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a positive and negative pressure combined precision ventilation pig house in view of the above shortcomings.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A positive and negative pressure combined precision ventilation pig house, comprising a pig house body, wherein a suspended ceiling is arranged in the pig house body, wherein the suspended ceiling divides the internal space of the pig house body into an upper ventilation area and a lower breeding area, wherein a plurality of ceiling windows are arranged on the suspended ceiling, wherein the ceiling windows connect the ventilation area and the breeding area;

[0007] The first side of the pig house body is provided with a first wall and a second wall from inside to outside, a positive pressure fan is provided on the first wall, and the output end of the positive pressure fan is connected to the breeding area, a water curtain is provided on the second wall, and a third wall, a fourth wall and a fifth wall are provided in sequence from inside to outside on the second side of the pig house body, a plurality of first openings connected to the ventilation area are opened on the third wall, a negative pressure fan is provided on the fourth wall, and a deodorizing layer is provided on the fifth wall;

[0008] A plurality of manure ditches are arranged at the bottom of the breeding area, and a plurality of second openings communicating with the manure ditches are opened on the third wall.

[0009] Furthermore, a ventilation duct is provided at the output end of the positive pressure fan, the starting end cross-section of the ventilation duct is larger than the end cross-section, and the ventilation duct is provided with a plurality of air outlet ducts connected to the breeding area.

[0010] Furthermore, the air outlet duct includes a large air outlet duct arranged at the side of the ventilation duct and a small air outlet duct arranged at the bottom of the ventilation duct.

[0011] Furthermore, the small air outlet pipe is a curved pipe, the air outlet direction of the small air outlet pipe is inclined downward, and the air outlet direction of the large air outlet pipe is inclined downward.

[0012] Furthermore, a first protective net is disposed in each of the first opening and the second opening.

[0013] Furthermore, a second protective net is arranged on the outer side of the second wall, and the second protective net and the top of the second wall are closed by tiles.

[0014] Furthermore, the water curtain includes water curtain paper, a water supply pipeline, a return water pipeline, a water pump and a water pool. The water curtain paper, the water supply pipeline and the return water pipeline are all arranged on the second wall. The water supply pipeline and the return water pipeline are respectively arranged at the top and bottom of the water curtain paper, and the water supply pipeline and the return water pipeline are both connected to the water pool. The water pump is arranged on the delivery pipeline.

[0015] Furthermore, the positive pressure fan and the negative pressure fan adopt variable frequency motors or EC motors.

[0016] Furthermore, the distance between the fifth wall and the fourth wall is 6m, the height of the deodorizing layer is 2.5-3m, and the thickness is 300-450mm.

[0017] Compared with the prior art, the utility model has the following advantages after adopting the above technical solution:

[0018] The utility model proposes a ventilation system using a combination of positive and negative pressure fans, which can not only reduce the temperature in the pig house and remove dust over a large area, but also allow fresh air to be accurately and evenly blown on the surface of the pigs, so that the air quality in the house is maintained at a good level. While not reducing the effective wind speed, the ventilation volume and energy consumption are reduced, and the wind speed, pressure and temperature distribution in the pig house are more uniform, avoiding heat accumulation or local overcooling in traditional pig houses.

[0019] By setting up positive pressure fans and ventilation ducts, the external fresh air can be blown onto the pigs through the air outlet ducts, so that the wind cooling effect can be reflected. With the shortest wind distance, the wind can be spread over the entire body surface of the pigs as much as possible, and each pig can breathe fresh air at the first time. This can achieve accurate air supply to the pigs in the house, so that the fresh air can effectively enter the pig pen.

[0020] By setting up a negative pressure fan, the gas in the pig house can be discharged from the manure ditch or ventilation area, which can not only cool down a large area of ​​the pig house and control the temperature of the pig house within the suitable temperature range for pigs, but also take away the waste gas and harmful substances in the pig house.

[0021] The utility model is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a plan view of an embodiment of the utility model;

[0023] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0024] Figure 3 A schematic plan view of a ceiling window in a house according to an embodiment of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a water curtain according to an embodiment of the utility model;

[0026] Figure 5 It is a schematic structural diagram of the ventilation duct according to an embodiment of the utility model.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Pig house body; 1a. Ventilation area; 1b. Breeding area; 11. First wall; 12. Second wall; 13. Third wall; 131. First opening; 132. Second opening; 14. Fourth wall; 15. Fifth wall; 2. Suspended ceiling; 21. Ceiling window; 31. Positive pressure fan; 32. Negative pressure fan; 4. Water curtain; 41. Water curtain paper; 42. Water supply pipeline; 43. Return pipeline; 44. Water pump; 45. Pool; 5. Deodorization layer; 6. Manure ditch; 7. Ventilation duct; 71. Large outlet duct; 72. Small outlet duct; 8. Second protective net. DETAILED DESCRIPTION

[0029] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise" and "counterclockwise" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0031] like Figure 1 , Figure 2 and Figure 3 As shown, a positive and negative pressure combined precision ventilation pig house comprises a pig house body 1, wherein a suspended ceiling 2 is arranged in the pig house body 1, wherein the suspended ceiling 2 divides the internal space of the pig house body 1 into an upper ventilation area 1a and a lower breeding area 1b, wherein a plurality of ceiling windows 21 are arranged on the suspended ceiling 2, wherein the ceiling windows 21 connect the ventilation area 1a and the breeding area 1b;

[0032] The first side of the pig house body 1 is provided with a first wall 11 and a second wall 12 from inside to outside, a positive pressure fan 31 is provided on the first wall 11, and the output end of the positive pressure fan 31 is connected to the breeding area 1b, a water curtain 4 is provided on the second wall 12, and a third wall 13, a fourth wall 14 and a fifth wall 15 are provided in sequence from inside to outside on the second side of the pig house body 1, a plurality of first openings 131 connected to the ventilation area 1a are opened on the third wall 13, a negative pressure fan 32 is provided on the fourth wall 14, and a deodorizing layer 5 is provided on the fifth wall 15;

[0033] A plurality of manure ditches 6 are disposed at the bottom of the breeding area 1 b , and a plurality of second openings 132 communicating with the manure ditches 6 are opened on the third wall 13 .

[0034] like Figure 5 As shown, as an embodiment, the output end of the positive pressure fan 31 is provided with a ventilation duct 7, the starting end cross-section of the ventilation duct 7 is larger than the end cross-section, and the ventilation duct 7 is provided with a plurality of air outlet pipes connected with the breeding area 1b; the air outlet pipe includes a large air outlet pipe 71 arranged on the side of the ventilation duct 7 and a small air outlet pipe 72 arranged at the bottom of the ventilation duct 7; the small air outlet pipe 72 is a curved pipe, and the air outlet direction of the small air outlet pipe 72 is inclined downward, and the air outlet direction of the large air outlet pipe 71 is inclined downward.

[0035] As an implementation manner, a first protection net is disposed in each of the first opening 131 and the second opening 132 .

[0036] As an implementation manner, a second protective net 8 is provided on the outer side of the second wall 12, and the second protective net 8 and the top of the second wall 12 are closed by tiles.

[0037] like Figure 4 As shown, as an embodiment, the water curtain 4 includes a water curtain paper 41, a water supply pipeline 42, a return water pipeline 43, a water pump 44 and a pool 45, the water curtain paper 41, the water supply pipeline 42 and the return water pipeline 43 are all arranged on the second wall 12, the water supply pipeline 42 and the return water pipeline 43 are respectively arranged at the top and bottom of the water curtain paper 41, and the water supply pipeline 42 and the return water pipeline 43 are both connected to the pool 45, and the water pump 44 is arranged on the delivery pipeline.

[0038] Preferably, the positive pressure fan 31 and the negative pressure fan 32 adopt variable frequency motors or EC motors.

[0039] Preferably, the distance between the fifth wall 15 and the fourth wall 14 is 6 m, the height of the deodorizing layer 5 is 2.5-3 m, and the thickness is 300-450 mm.

[0040] Ventilation path 1: second protection net 8 - water curtain 4 - public corridor - positive pressure fan 31 - ventilation duct 7 - breeding area 1b - ceiling window 21 - ventilation area 1a - first opening 131 - negative pressure fan 32 - deodorization layer 5 - outside the house;

[0041] Ventilation path 2: second protective net 8 - water curtain 4 - public corridor - positive pressure fan 31 - ventilation duct 7 - breeding area 1b - manure ditch 6 - second opening 132 - pressure fan 32 - deodorization layer 5 - outside the house.

[0042] Embodiment 1:

[0043] Four pig house units are arranged in a row in the pig house body 1;

[0044] The height of the second protection net 8 is 3.9m (it can be changed according to the height of the pig house), the distance between the second protection net 8 and the second wall 12 is 3m, the mesh size of the second protection net 8 is 18 meshes, and it is made of 304 stainless steel. A 500mm high color steel plate is set at the bottom of the second protection net 8, and the color steel plate is used to prevent rats. The second protection net 8 and the top of the second wall 12 are provided with tiles, and the distance between the second protection net 8 and the water curtain 4 is 1m;

[0045] Each pig house unit is equipped with two positive pressure fans 31. The positive pressure fans 31 are selected according to the age of the pigs, the number of pigs, and the ventilation pressure required by the entire system. The positive pressure fans 31 are arranged on the first wall 11 and connected to the ventilation duct 7. The positive pressure fans 31 are not equipped with a wind pipe, and a protective net cover is required. A variable frequency motor or EC motor must be used;

[0046] The starting end of the ventilation duct 7 is connected to the positive pressure fan 31. The ventilation duct 7 is designed to have a gradual cross-section, with a large cross-section at the starting end and a small cross-section at the end. By arranging a row of large air outlet ducts 71 and a row of small air outlet ducts 72 on the side and bottom of the ventilation duct 7, the fresh air in the duct forms a jet and is accurately delivered to the pig house, and the fresh air in the jet state is blown farther; the total length of the ventilation duct 7 is 23500mm, the large air outlet duct 71 is a square-to-circular tube, and the diameter of the large air outlet duct 71 is 150mm, the spacing is 510mm, the small air outlet duct 72 is a 45° PVC elbow tube, and the diameter of the small air outlet duct 72 is 50mm, the spacing is 420mm, the large air outlet duct 71 and the small air outlet The angle of the pipe 72 is 120°. The large air outlet pipe 71 and the small air outlet pipe 72 are both made of PVC pipes. When installing the small air outlet pipe 72, it is necessary to ensure that the air outlet direction is consistent and tighten it on the side of the pig to ensure that the pigs can get effective fresh air. The ventilation duct 7 is made of 0.4mm thick manganese-magnesium-aluminum-zinc plate. The connections between the sections of the duct are fixed with rivets. The gaps need to be sealed with glue. The upper top plate and side surfaces of the ventilation duct 7 can use the ceiling and side walls to form a closed air duct space, or the ceiling or side walls can be used to ensure that the duct is more sealed. The spacing between the large and small air outlet pipes 71 and the small air outlet pipes 72 of the ventilation duct 7 is arranged in combination with the fence size.

[0047] The height of the ceiling 2 is usually designed to be 2.2 to 2.4 meters high according to the requirements of ventilation, feeding and other equipment. The opening size of the ceiling window 21 gradually decreases along the air outlet direction of the positive pressure fan. The flow rate of gas in the breeding area 1b entering the ventilation area 1a can be adjusted by adjusting the opening of the ceiling window 21;

[0048] The mesh size of the first protective net is 18 mesh and is made of 304 stainless steel;

[0049] The interval between the third wall 13 and the fourth wall 14 is 1.5m. Each pig house unit is equipped with two negative pressure fans 32. The negative pressure fans 32 are selected according to the age of the pigs, the number of pigs, and the ventilation pressure required by the entire system. The negative pressure fans are not equipped with a fan duct, and a protective net cover is required. A variable frequency motor or EC motor must be used;

[0050] Each pig house unit is equipped with a set of water curtains 4. The area of ​​the water curtain paper 41 is not more than 2m / s according to the wind speed passing through the curtain. The height of the water curtain 4 can be 1.5m, 1.8m or 2m. The thickness of the water curtain paper 41 is 150mm. The installation method of the water curtain 4 can be designed to be internally hung or externally hung according to the relationship with the wall. The water pool 45 can be equipped with a protective net on the top of the water pool 45 as needed;

[0051] The distance between the fifth wall 15 and the fourth wall 14 is 6m. The deodorizing layer 5 is designed to be continuous and not divided into pig house units. The deodorizing filler area is designed based on the wind speed passing through the deodorizing filler (generally not exceeding 1m / s). The height of the deodorizing filler is generally designed to be 3 meters, 2.5 meters, etc., and the thickness is designed to be 450mm and 300mm. The deodorizing filler in the deodorizing layer 6 needs to be equipped with a deodorizing water pool for deodorizing circulating water.

[0052] The above is an example of the best implementation of the utility model, and the parts not described in detail are common knowledge of ordinary technicians in this field. The protection scope of the utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the utility model is also within the protection scope of the utility model.

Claims

1. A precision ventilation pig house with a combination of positive and negative pressure, characterized in that: The invention comprises a pig house body (1), wherein a suspended ceiling (2) is arranged in the pig house body (1), wherein the suspended ceiling (2) divides the internal space of the pig house body (1) into an upper ventilation area (1a) and a lower breeding area (1b), wherein a plurality of ceiling windows (21) are arranged on the suspended ceiling (2), and wherein the ceiling windows (21) connect the ventilation area (1a) and the breeding area (1b); The first side of the pig house body (1) is provided with a first wall (11) and a second wall (12) from the inside to the outside, the first wall (11) is provided with a positive pressure fan (31), and the output end of the positive pressure fan (31) is connected to the breeding area (1b), the second wall (12) is provided with a water curtain (4), the second side of the pig house body (1) is provided with a third wall (13), a fourth wall (14) and a fifth wall (15) from the inside to the outside, the third wall (13) is provided with a plurality of first openings (131) connected to the ventilation area (1a), the fourth wall (14) is provided with a negative pressure fan (32), and the fifth wall (15) is provided with a deodorizing layer (5); A plurality of manure ditches (6) are provided at the bottom of the breeding area (1b), and a plurality of second openings (132) communicating with the manure ditches (6) are provided on the third wall (13).

2. The positive and negative pressure combined precision ventilation pig house according to claim 1 is characterized in that: The output end of the positive pressure fan (31) is provided with a ventilation duct (7), the starting end cross-section of the ventilation duct (7) is larger than the end cross-section, and the ventilation duct (7) is provided with a plurality of air outlet ducts connected to the breeding area (1b).

3. The positive and negative pressure combined precision ventilation pig house according to claim 2 is characterized in that: The air outlet pipe comprises a large air outlet pipe (71) arranged on the side of the ventilation air pipe (7) and a small air outlet pipe (72) arranged on the bottom of the ventilation air pipe (7).

4. The positive and negative pressure combined precision ventilation pig house according to claim 3 is characterized in that: The small air outlet pipe (72) is a curved pipe, the air outlet direction of the small air outlet pipe (72) is inclined downward, and the air outlet direction of the large air outlet pipe (71) is inclined downward.

5. The positive and negative pressure combined precision ventilation pig house according to claim 1 is characterized in that: A first protective net is disposed in both the first opening (131) and the second opening (132).

6. The positive and negative pressure combined precision ventilation pig house according to claim 1 is characterized in that: A second protective net (8) is arranged on the outer side of the second wall (12), and the second protective net (8) and the top of the second wall (12) are closed by a tile plate.

7. The positive and negative pressure combined precision ventilation pig house according to claim 6 is characterized in that: The water curtain (4) comprises water curtain paper (41), a water delivery pipeline (42), a water return pipeline (43), a water pump (44) and a water pool (45); the water curtain paper (41), the water delivery pipeline (42) and the water return pipeline (43) are all arranged on the second wall (12); the water delivery pipeline (42) and the water return pipeline (43) are respectively arranged at the top and bottom of the water curtain paper (41); the water delivery pipeline (42) and the water return pipeline (43) are both connected to the water pool (45); and the water pump (44) is arranged on the delivery pipeline.

8. The positive and negative pressure combined precision ventilation pig house according to claim 1 is characterized in that: The positive pressure fan (31) and the negative pressure fan (32) adopt variable frequency motors or EC motors.

9. The positive and negative pressure combined precision ventilation pig house according to claim 1 is characterized in that: The distance between the fifth wall (15) and the fourth wall (14) is 6 m, the height of the deodorizing layer (5) is 2.5 to 3 m, and the thickness is 300 to 450 mm.

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