CN210555544U

CN210555544U - Mechanical ventilation system for transport ship

Info

Publication number: CN210555544U
Application number: CN201920861826.5U
Authority: CN
Inventors: 胡育铭; 严云修; 卢毅; 马洪福; 张�成
Original assignee: Sinograin Zhenjiang Grain And Oil Co ltd
Current assignee: Sinograin Zhenjiang Grain And Oil Co ltd
Priority date: 2019-06-10
Filing date: 2019-06-10
Publication date: 2020-05-19
Anticipated expiration: 2029-06-10

Abstract

The utility model discloses a mechanical ventilation system for transport ship, which comprises a cabin main body, wherein ventilation pipelines are arranged around the bottom of the cabin main body, a fan is arranged on a side deck at the front end of the cabin main body, and an air outlet of the fan is communicated with an air inlet pipe which vertically extends downwards through a horizontally arranged guide pipe; the air inlet pipe is communicated with the ventilation pipeline; the ventilating duct is provided with a ventilating hole which takes the position where the air inlet pipe is communicated with the ventilating duct as a starting point and extends towards the cabin tail; the utility model provides a mechanical ventilation system simple structure is reasonable, through being equipped with air pipe all around at the cabin bottom of a ship's cabin to set up the ventilation hole of different density apart from the different distance departments of fan at the pipeline, continuously blast air, with the air through ventilation hole diffusion to cabin inside, at the inside accelerated circulation of air of cabin, form cooling ventilation system, avoid leading to the bulkhead dewfall and the dregs of beans intensification because of the circulation of air is not circulated, and then lead to the dregs of beans mildy and rot.

Description

Mechanical ventilation system for transport ship

Technical Field

The utility model relates to a mechanical ventilation system for transport ship.

Background

The soybean meal is a byproduct obtained after oil and fat are extracted from soybeans, is a vegetable protein material which is most widely applied in the feed industry, and is mostly water-soluble protein. In 2017, the yield of soybean meal in China reaches 7445 ten thousand tons, and Zhujiang delta and Yangtze river basin are main consumption areas. The long-distance transportation of the bean pulp mostly adopts two waterway transportation modes of bulk transportation or packaging, and the waterway transportation of the packaged bean pulp accounts for over 85 percent at present because most downstream logistics enterprises or feed factories do not have the operation capability of bulk transportation and bulk transportation. However, when the packed bean pulp stacked in the cabin sails for a long time, the humidity of the material environment is affected by temperature difference, condensation can be formed, the materials can also generate heat, and microorganisms in the high-protein bean pulp grow rapidly in a high-temperature and high-humidity environment, so that the bean pulp is mildewed, caked, lost in moisture and other quality changes. In recent decades, the research on bean pulp is mainly focused in 2 fields of fermented bean pulp and deep processing, and the research on the quality change of the bean pulp in the transportation process is rarely reported, so that when the packaged bean pulp is transported in a waterway, moisture absorption materials such as straw mat, geotextile, high-imitation cotton, sponge and the like are mostly adopted to prevent the quality change of the bean pulp, the cost is high, and after the material is saturated by water absorption, if the material is sailed continuously, the quality deterioration of the bean pulp is accelerated, and great economic loss and waste are caused to enterprises and society, so that a technical means in the waterway transportation of the packaged bean pulp is urgently needed to solve the technical problems and prevent the mildew of the bean pulp.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects of the prior art, and provides a mechanical ventilation system for a transport ship, which comprises a cabin main body, wherein ventilation pipelines are arranged around the bottom of the cabin main body, a fan is arranged on a side deck plate at the front end of the cabin main body, and an air outlet of the fan is communicated with an air inlet pipe which vertically extends downwards through a horizontally arranged guide pipe; the air inlet pipe is communicated with the ventilation pipeline;

the ventilating duct is provided with ventilating holes, the ventilating holes extend towards the cabin tail along the ventilating duct by taking the position where the air inlet pipe is communicated with the ventilating duct as a starting point, the hole distance between adjacent ventilating holes at the ventilating duct section 0-1/4 away from the starting point is set to be 70-90cm, the hole distance between adjacent ventilating holes at the ventilating duct section 1/4-2/4 away from the starting point is set to be 50-70cm, the hole distance between adjacent ventilating holes at the ventilating duct section 2/4-3/4 away from the starting point is set to be 30-50cm, and the hole distance between adjacent ventilating holes at the ventilating duct section 3/4-4/4 away from the starting point is 10-.

Preferably, a temperature and humidity detection unit is further arranged in the cabin main body and comprises a temperature sensor and a humidity sensor and is used for monitoring the temperature and the humidity in the cabin in real time.

Preferably, the length of the air inlet pipe is 1-1.5 m.

Preferably, the air inlet pipe and the ventilation pipeline are PVC pipelines.

Has the advantages that: the utility model provides a mechanical ventilation system simple structure is reasonable, through being equipped with air pipe all around at the cabin bottom of a ship's cabin to set up the ventilation hole of different density apart from the different distance departments of fan at the pipeline, continuously blast air, with the air through ventilation hole diffusion to cabin inside, at the inside accelerated circulation of air of cabin, form cooling ventilation system, avoid because of the cabin wall dewfall and the beans dregs of rice intensification that the circulation of air leads to, and then lead to the mildening and rot of beans dregs of rice.

Drawings

Fig. 1 is a schematic structural view of a mechanical ventilation system for a transport ship according to the present invention;

FIG. 2 is a top view of a mechanical ventilation system;

FIG. 3 is a temperature and humidity monitoring data graph during navigation of the No. 1 ship;

FIG. 4 is a temperature and humidity monitoring data graph during navigation of No. 3 ship.

Detailed Description

In order to deepen the understanding of the present invention, the present invention will be further described in detail with reference to the following embodiments and the attached drawings, and the embodiments are only used for explaining the present invention, and do not constitute the limitation to the protection scope of the present invention.

The utility model relates to a mechanical ventilation system for transport ship, which comprises a cabin main body 1, wherein ventilation pipelines 2 are arranged around the bottom of the cabin main body 1, a fan 3 is arranged on a side deck at the front end of the cabin main body, and an air outlet of the fan is communicated with an air inlet pipe 42 which vertically extends downwards through a horizontally arranged guide pipe 41; the air inlet pipe 42 is communicated with the ventilating duct 2;

the ventilating duct is provided with a ventilating hole 21, the ventilating hole extends towards the cabin tail along the ventilating duct by taking the position where the air inlet pipe 42 is communicated with the ventilating duct 2 as a starting point, the distance between the adjacent ventilating holes at the ventilating duct section 0-1/4 away from the starting point is set to be 70-90cm, the distance between the adjacent ventilating holes at the ventilating duct section 1/4-2/4 away from the starting point is set to be 50-70cm, the distance between the adjacent ventilating holes at the ventilating duct section 2/4-3/4 away from the starting point is set to be 30-50cm, and the distance between the adjacent ventilating holes at the ventilating duct section 3/4-4/4 away from the starting point is 10.

In the above technical scheme, a temperature and humidity detection unit is further arranged in the cabin main body 1, and the temperature and humidity detection unit comprises a temperature sensor and a humidity sensor (not shown) and is used for monitoring the temperature and humidity in the cabin in real time.

In the above technical solution, the length of the air inlet pipe 42 is 1-1.5m, preferably 1 m.

In the above technical solution, the air inlet pipe 42 and the ventilation duct 2 are PVC pipes.

Device model selection

Selecting 2500-3000 tons of ships to load the packaged bean pulp, wherein the length of a cabin is about 50m, the width of the ship is about 10m, and the depth of the cabin is about 5 m; when the bean pulp is packed and stacked 4, 10cm air channels 5 are reserved between the goods and cabin walls on two sides, and the head and the tail of the ship are not reserved so as to prevent the goods from being stacked, and the indexes of the packed bean pulp are determined by GB/T19541-2017 as shown in Table 1;

TABLE 1

Item	Index (I)	Qualified range
			Protein content	43％	42.7％～43.5％
Protein content	46％	45.6％～46.3％
			Water content	12.5％	12.5％～13％
Packaging specification	50Kg	49.98Kg～50.02Kg
			Packaging specification	70Kg	69.98Kg～70.02Kg

Volume of unilateral ventilation in the cabin: v is 50m × 5m × 10cm is 2.5m³Ventilation volume: l n.v. 60 times x 2.5m³＝150m³Corrected by 1.1 times, the single side ventilation requirement is 165m³/h。

PVC pipe: pipe diameter sectional area is 165m wind quantity/wind speed³/h÷4.2m/s＝0.01527m²The inner diameter d of the pipe is 110 mm;

aperture and spacing requirements: the aperture is 10mm, the distance between adjacent holes of 1/4 section of ventilating pipe is 80cm, the distance between adjacent holes of 2/4 section of ventilating pipe is 60cm, the distance between adjacent holes of 3/4 section of ventilating pipe is 40cm, and the distance between adjacent holes of 4/4 section of ventilating pipe is 20cm by taking the set point of the fan 3 as a starting point.

Test experiments:

selecting a plurality of ships from Zhenjiang harbor to Chongqing harbor, and testing the change conditions of mildew, short weight, moisture and protein solubility in the bean pulp after the packaged bean pulp is sailed for a long time within 20 days; the initial packaged soybean meal package specifications, protein and moisture content, and ventilation mode are shown in table 2;

and (3) ventilation time: twice a day (except during overcast and rainy periods), 5: 00-9: 00 and 19: 00-24: 00; ventilation is not performed in rainy periods;

after the navigation time is over, the test results are shown in tables 3-5; table 3 shows the results of the mildewing and short-weight of the packaged soybean meal after each ship sailing for the corresponding time; table 4 shows the moisture change index of the packaged soybean meal after each ship sailing for the corresponding time; table 5 shows the index of change in protein solubility of the packaged soybean meal after each ship voyage for a corresponding time;

TABLE 2

TABLE 3

TABLE 4

TABLE 5

The high-temperature period in summer is a season with frequent mildew, and the main reasons are that the dew point temperature is about 21 ℃, the internal temperature of a cabin in summer is 60 ℃, the shipping temperature of packaged bean pulp is generally 37 ℃, the temperature of river water is about 20 ℃, the temperature difference exceeds 15 ℃, condensation can be formed on the inner wall of the cabin, the condensation water permeates into the bagged bean pulp, and the mildew is caused by rapid propagation of the mildew due to high temperature and high humidity; the shortness and heaviness are mainly caused by the moisture loss of the soybean meal, and the moisture loss of the soybean meal is caused by direct solar radiation due to high temperature in summer; as can be seen from table 3, since No. 1 ship adopts the mechanical ventilation mode, compared with No. 2 ship, the number of mildew of soybean meal is reduced by half, and no short and heavy phenomena occur.

As can be seen from Table 4, the water dispersion of the soybean meal during sailing is positively correlated with the mildew and short-weight, and the water dispersion of the packaged soybean meal of the No. 1 ship is obviously reduced compared with that of the No. 2 ship.

As can be seen from table 5, the difference in protein solubility is positively correlated with the amount of mildew, and the more the protein solubility decreases, the more the amount of mildew increases, so that the protein solubility is an index reflecting the degree of heating of the soybean meal, and the protein solubility of the soybean meal which is heated excessively decreases, and the urease activity decreases seriously; it is believed that the protein solubility is between 70-85%, and when the protein solubility of the soybean meal is less than 70%, the digestibility is reduced, so that the protein solubility of the soybean meal with heat caused by mildew is obviously reduced, which also means that the availability of the protein is reduced. Because the mechanical ventilation mode is adopted by the No. 1 ship, compared with the No. 2 ship, the protein solubility is reduced a little, which shows that the heating degree of the soybean meal is reduced by good ventilation.

FIGS. 3 and 4 show temperature and humidity monitoring data during sailing of No. 1 and No. 3 ships, respectively; the water temperature of Yangtze river is kept at about 20 ℃ in 8 months, the initial temperature of the bagged soybean meal is 35 ℃, and the humidity is 70; as shown in fig. 3, the humidity of the lower cabin is basically maintained, and the temperature is slowly reduced to be close to the temperature of river water; this is mainly because ventilation pipe exhaust vent sets up in the cabin bottom, and the air circulation is accelerated in the continuous blast, forms cooling ventilation system, avoids leading to the bulkhead dewfall because of the air is not circulated. The middle-layer cabin and the upper-layer cabin are close to the upper part of the river surface, and are obviously influenced by external temperature, particularly 9 months and 13 days, the tarpaulin covering the cabins is opened under the influence of typhoon, the temperature and the humidity are greatly changed, the humidity is obviously increased later, and mildewed soybean meal is generated. It can be seen that the main cause of the mildewing of the soybean meal is the result of the increase of the moisture content of the soybean meal, but the moisture content of the mildewed soybean meal is not always over-standard.

As shown in figure 4, the water temperature of the Yangtze river is kept at about 12 ℃ for 12 months, the humidity of the upper, middle and lower layers of the cabin is stable, the temperature in the cabin is slowly reduced, and the phenomena of short and heavy mildewing do not occur.

From this can prove that although summer and winter season, ambient temperature and the temperature difference in the cabin are more than 10 degrees, can form cooling and ventilating system through mechanical ventilation, avoid forming the high temperature and high humidity environment in the cabin, reduce and milden and rot.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mechanical ventilation system for a transport ship is characterized by comprising a cabin main body, wherein ventilation pipelines are arranged around the periphery of the bottom of the cabin main body, a pair of fans are symmetrically arranged on a side deck at the front end of the cabin main body, and air outlets of the fans are communicated with an air inlet pipe which vertically extends downwards through a horizontally arranged guide pipe; the air inlet pipe is communicated with the ventilation pipeline;

2. The mechanical ventilation system for the transport ship according to claim 1, wherein a temperature and humidity detection unit is further arranged in the cabin main body, and the temperature and humidity detection unit comprises a temperature sensor and a humidity sensor and is used for monitoring the temperature and humidity in the cabin in real time.

3. The mechanical ventilation system for transport vessels of claim 1, wherein the length of the air intake duct is 1-1.5 m.

4. The mechanical ventilation system for the transport ship of claim 1, wherein the air inlet pipe and the air vent pipe are PVC pipes.